TWI875347B - Height adjustment mechanism, seat adjustment device, rotation adjustment mechanism and chair - Google Patents

Abstract

The present disclosure provides a height adjustment mechanism, a seat adjustment device, a rotation adjustment mechanism and a chair. The height adjustment mechanism is disposed between a bracket assembly and a seat assembly, and includes a supporting base and two adjustment members. The bracket assembly includes a base, and the seat assembly includes a seat. The supporting base is integrated with the base or rotatably mounted on the base, and the supporting base supports the seat through the two adjustment members. Lower ends of the two adjustment members are respectively pivotally connected to the supporting base through two first shafts, and upper ends of the two adjustment members are respectively movably connected to the seat to form two connecting points. The two adjustment members are rotatable respectively around corresponding first shafts to change positions of the two connecting points relative to the supporting base or the seat, so as to raise or lower the seat.

Description

Height adjustment mechanism, seat adjustment device, rotation adjustment mechanism and chair

The invention relates to a height adjustment mechanism, a seat adjustment device, a rotation adjustment mechanism and a chair.

A high chair includes a support frame with multiple legs and a seat supported by the support frame, and is used to support a child in a higher sitting position, so that a caregiver can feed the child or the child and the caregiver can have a meal together. The high chair provides a fixed sitting position for the child, but the tabletop heights in different families are not completely consistent, or there are multiple tabletop heights in the same family, and a high chair with a fixed height cannot adapt to different tabletop heights.

Some vehicles such as high chairs are usually equipped with a leg folding structure so that the high chair has an unfolded state with the legs unfolded, and a folded state with the legs folded. Current leg folding structures usually include a support seat, a plurality of legs, a slide bar, and a plurality of linkages. Each leg is pivoted to the support seat respectively. The slide bar passes through the center hole of the support seat so as to be able to move along the vertical direction of the support seat. The top end of the slide bar is used to install the child seat. The bottom end of the slide bar is pivoted to one end of each linkage, and the other end of each linkage is pivoted to each leg. When the legs are unfolded, the slide bar drives the child seat to move downward relative to the support seat. When the legs are folded, the slide bar drives the child seat to move upward relative to the support seat, so that the folded carrier occupies a larger space in the vertical direction.

Some high chairs achieve height adjustment by slidably mounting the seat on legs and by sliding the seat relative to the legs.

On the one hand, the present invention provides a height adjustment mechanism, which is arranged between a bracket assembly and a seat assembly, and the height adjustment mechanism includes a support seat and two adjustment pieces; the bracket assembly includes a base, and the seat assembly includes a seat; the support seat and the base are an integral part or the support seat is rotatably mounted on the base, and the support seat supports the seat through the two adjustment pieces; the lower ends of the two adjustment pieces are respectively pivoted to the support seat through two first axes, and the upper ends of the two adjustment pieces are respectively movably connected to the seat to form two connection points; the two adjustment pieces can rotate around the corresponding first axes to change the positions of the two connection points relative to the support seat or the seat, thereby raising or lowering the seat.

According to one embodiment, the two adjustment members are capable of rotating in opposite directions around the corresponding first axes so that the positions of the two connection points relative to the support base or the seat are changed.

According to one embodiment, the seat has a first height and a second height relative to the support base, and the first height is greater than the second height; when the seat is at the first height, the support base, the seat, and the connection points between the two adjustment parts define a first area; when the seat is at the second height, the support base, the seat, and the connection points between the two adjustment parts define a second area; the first area is greater than the second area.

According to one embodiment, the two adjusting members are arranged opposite to each other in a first horizontal direction and separated from each other, the axial direction of each first axis is perpendicular to the first horizontal direction, and when the two adjusting members rotate in opposite directions around the corresponding first axis, the two connection points move in the vertical direction while approaching or moving away from each other in the first horizontal direction; and/or, the height adjustment mechanism further includes two first locking members, the two first locking members correspond one-to-one to the two adjusting members; and each of the first locking members has a locking position for locking the relative position of the corresponding adjusting member and the seat.

According to one embodiment, the seat is provided with a plurality of slots, and each of the first locking members is selectively engaged with a corresponding slot among the plurality of slots; and/or, the height adjustment mechanism further includes a first elastic element, and the first elastic element is used to drive each of the first locking members to engage with the seat.

According to one embodiment, the height adjustment mechanism also includes two slide blocks slidably matched with the seat, the two slide blocks are respectively pivoted with the upper ends of the two adjustment members through a second axis, the second axis is parallel to the first axis; and the two slide blocks correspond one-to-one to the two first locking members, and each of the first locking members is movably connected to the corresponding slide block.

According to one embodiment, a receiving cavity is provided at the bottom of the seat, the two slide blocks are located in the receiving cavity, each of the second axes extends from the side wall of the receiving cavity and is hinged with the upper end of the corresponding adjusting member; and the side wall of the receiving cavity is provided with a first elongated hole corresponding to the two ends of each of the second axes.

According to one embodiment, each of the first locking members moves in a vertical direction relative to the corresponding sliding block to move to a locking position engaged with the seat or a releasing position disengaged from the seat; and/or, the height adjustment mechanism further includes two first driving members, and the two first driving members correspond one-to-one to the two first locking members; each of the first driving members is drivingly connected to the corresponding first locking member, and each of the first driving members drives the corresponding first locking member to move and disengage from the seat when subjected to external force.

According to one embodiment, one of the first locking member and the corresponding first driving member is provided with a first pin, and the other is provided with a driving slope; the first pin is parallel to the first axis; the driving slope abuts against the first pin; and when each of the first driving members is subjected to the external force, the driving slope abuts against the first pin, driving the first locking member to move.

According to one embodiment, the height adjustment mechanism further includes at least one first release member, and the at least one first release member and the two first driving members are operably connected to apply the external force to each of the first driving members.

According to one embodiment, the height adjustment mechanism includes two first release members, and the two first release members correspond to the two first driving members one by one; each of the first release members is connected to the corresponding first driving member through a first pull member, and the first pull member is set in a protective cover; and/or, the height adjustment mechanism also includes a second elastic element, and the second elastic element is used to drive at least one first release member to reset.

According to one embodiment, the two adjustment members are arranged opposite to each other in a first horizontal direction and separated from each other; each of the adjustment members includes a pair of connecting arms arranged opposite to each other in a second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the upper ends of the pair of connecting arms are movably connected to the seat, the lower ends of the pair of connecting arms are connected to the support seat through a first axis pivot, and the pair of connecting arms are connected through a side panel; at least one of the two opposite surfaces of the pair of connecting arms is provided with a slide groove, and the seat is provided with a protrusion that slidably cooperates with the slide groove.

According to one embodiment, the two adjusting members are arranged opposite to each other in a first horizontal direction and separated from each other, and the axial direction of the first axis is perpendicular to the first horizontal direction; the supporting seat is provided with two supporting members arranged opposite to each other in the first horizontal direction, and the two supporting members correspond to the two adjusting members one by one; one of the upper end of the supporting member and the lower end of the adjusting member is provided with a mounting hole, and the other is provided with the first axis, and the first axis is pivotally connected to the mounting hole; an angle limiting mechanism is provided between at least one pair of corresponding supporting members and adjusting members, and the angle limiting mechanism is used to limit the rotation angle range of the adjusting member.

According to one embodiment, the upper end distance between the two support members is greater than the lower end distance thereof; and/or, the angle limiting mechanism includes: a first arcuate groove, located on the hole wall of the mounting hole and extending circumferentially; and an elastic telescopic pin, mounted on the first axis and suitable for being inserted into the first arcuate groove.

According to one embodiment, the hole wall of the mounting hole is provided with a slope, and the slope is used to guide the elastic telescopic pin to be inserted into the first arc groove.

On the other hand, the present invention provides a seat adjustment device, which is arranged between a bracket assembly and a seat assembly, and the seat adjustment device includes: a first adjustment column, connected to the seat of the seat assembly; a second adjustment column, connected to the base of the bracket assembly and plugged into and matched with the first adjustment column; and a height adjustment mechanism, which is arranged between the first adjustment column and the second adjustment column, and the height adjustment mechanism can switch between a locked state and a released state; wherein, when the height adjustment mechanism is in a locked state, the first adjustment column is fixed at a certain height position relative to the second adjustment column, and when the height adjustment mechanism is in a released state, the first adjustment column can move relative to the second adjustment column.

According to one embodiment, the height adjustment mechanism includes: a plurality of adjustment holes, which are arranged on one of the first adjustment column and the second adjustment column; a height locking piece, which is movably arranged on the other of the first adjustment column and the second adjustment column, and the height locking piece can be switched between a first locking position and a first release position; wherein, when the height locking piece is located at the first locking position, the height locking piece is engaged with at least one of the plurality of adjustment holes, and when the height locking piece is located at the first release position, the height locking piece is disengaged from the at least one adjustment hole.

According to one embodiment, the height adjustment mechanism further includes a height driving member, one of the height locking member and the height driving member is provided with a first driving groove, the other of the height locking member and the height driving member is provided with a first driving pin, the extension direction of the first driving groove is inclined relative to the moving direction of the height locking member, the first driving pin is plugged into and matched with the first driving groove and can move along the first driving groove, and the height driving member can drive the height locking member to move between the first locking position and the first releasing position.

According to one embodiment, the multiple adjustment holes are arranged on the second adjustment column, and the height locking piece is arranged on the first adjustment column; the height adjustment mechanism also includes: a fixed seat, connected to the first adjustment column and provided with a guide groove, the extension direction of the guide groove is perpendicular to the axial direction of the first adjustment column; the first driving pin is plugged into the guide groove and can move along the guide groove.

According to one embodiment, the height adjustment mechanism further includes a first reset member, which is suitable for biasing the height drive member to move the height locking member toward the first locking position; and/or, the height adjustment mechanism further includes: a height operating member, which can switch between a first position and a second position; a pulling member, one end of which is connected to the height driving member, and the other end of which is connected to the height operating member; wherein the height operating member can be operated to drive the height driving member to move through the pulling member, so as to drive the height locking member from the first locking position to the first release position.

According to one embodiment, the height adjustment mechanism further includes a second reset member, which is suitable for biasing the height operating member to move to the first position; and/or, the seat adjustment device further includes a mounting seat, and the first adjustment column is connected to the seat through the mounting seat; the mounting seat includes: an upper cover, connected to the bottom of the seat and connected to the first adjustment column; a lower cover, which is enclosed with the upper cover to form a first accommodating cavity, and at least a portion of the height operating member is accommodated in the first accommodating cavity.

According to one embodiment, the mounting seat further includes a connecting tube, which is arranged around the outer circumference of the first adjustment column and encloses the first adjustment column to form a second accommodating cavity, the second accommodating cavity is connected to the first accommodating cavity, and at least a portion of the pulling member is accommodated in the second accommodating cavity.

According to one embodiment, the height adjustment mechanism further includes a fixed seat, which is arranged at an end of the first adjustment column far away from the seat assembly, and at least a portion of the fixed seat is accommodated in the second accommodating cavity, the height driving member and the height locking member are accommodated in the second accommodating cavity, and are respectively movably connected to the fixed seat.

According to one embodiment, the seat adjustment device further includes an anti-escape mechanism, which includes: an elastic finger, arranged on the connecting tube, the elastic finger having a hook portion protruding in a direction away from the second accommodating cavity; and a locking groove, arranged on the bracket assembly, the extension direction of the locking groove is parallel to the axial direction of the second adjustment column; wherein the hook portion can move along the locking groove, and the end of the locking groove limits the moving stroke of the hook portion.

According to one embodiment, the bracket assembly further includes an adjustment seat, which is connected to the base; the adjustment seat is at least partially arranged around the second adjustment column and connected to the second adjustment column, and the engaging groove is arranged on the adjustment seat.

According to one embodiment, the bracket assembly further includes an adjustment seat, which is connected to the base so as to be rotatable relative to each other; a first receiving groove is defined between the adjustment seat and the second adjustment column, the connecting tube is slidably matched with the first receiving groove, and the connecting tube cannot be rotated relative to the adjustment seat.

According to one embodiment, the first adjustment column has a hollow inner cavity, and the second adjustment column is inserted into the hollow inner cavity and can move along the hollow inner cavity.

According to one embodiment, a protrusion is provided on the outer side surface of the second adjustment column, and the protrusion abuts against and slidably cooperates with the cavity wall of the hollow inner cavity of the first adjustment column.

According to one embodiment, a fixing seat is provided at one end of the first adjustment column far from the seat assembly, and the fixing seat is provided with a groove, and the groove is suitable for cooperating with the protrusion and allowing the protrusion to pass through.

Another aspect of the present invention provides a rotation adjustment mechanism, which is arranged between a seat component and a bracket component that can rotate relative to each other to operatively lock the circumferential position of the seat component relative to the bracket component.

According to one embodiment, the seat assembly is mounted on a support seat, the bracket assembly includes a base, and the support seat is rotatably mounted on the base; the rotation adjustment mechanism includes a third locking piece, and the third locking piece is mounted on one of the support seat and the base, and the other of the support seat and the base is circumferentially provided with a plurality of positioning holes, and the third locking piece is selectively inserted into one of the plurality of positioning holes to lock the relative position of the support seat and the base.

According to one embodiment, the seat assembly is connected to the bracket assembly via an adjustment seat; the rotation adjustment mechanism is operably arranged on the bracket assembly, and the rotation adjustment mechanism has a release state and a lock state. When the rotation adjustment mechanism is in the release state, the adjustment seat can rotate relative to the bracket assembly or the seat assembly to adjust the circumferential relative position of the seat assembly and the bracket assembly; when the rotation adjustment mechanism is in the lock state, the adjustment seat cannot rotate relative to the bracket assembly and the seat assembly, thereby locking the circumferential relative position of the seat assembly and the bracket assembly.

According to one embodiment, the seat assembly is connected to a first adjustment column, the adjustment seat is connected to a second adjustment column, and the second adjustment column is plugged into and fit with the first adjustment column; a height adjustment mechanism is provided between the first adjustment column and the second adjustment column, and the height adjustment mechanism can switch between a locked state and a released state; wherein, when the height adjustment mechanism is in a locked state, the first adjustment column is fixed at a certain height position relative to the second adjustment column, and when the height adjustment mechanism is in a released state, the first adjustment column can move relative to the second adjustment column.

According to one embodiment, the rotation adjustment mechanism includes: a plurality of slots, which are arranged in one of the bracket assembly and the adjustment seat; and a rotation locking piece, which is arranged in the other of the bracket assembly and the adjustment seat, and the rotation locking piece can switch between a second locking position and a second release position; wherein, when the rotation locking piece is in the second locking position, the rotation locking piece is engaged with at least one of the plurality of slots, so that the adjustment seat cannot rotate relative to the bracket assembly, and when the rotation locking piece is in the second release position, the rotation locking piece is disengaged from the plurality of slots, so that the adjustment seat can rotate relative to the bracket assembly.

According to one embodiment, the rotating locking member is disposed on the adjusting seat, the adjusting seat is provided with a second through hole, and the rotating locking member is movably penetrated through the second through hole.

According to one embodiment, the rotation adjustment mechanism further includes a rotation operating member, which is mounted to the adjustment seat, and the rotation operating member is drivingly connected to the rotation locking member to drive the rotation locking member to switch between the second locking position and the second release position.

According to one embodiment, the rotating locking member has a first driving surface, and the rotating operating member has a second driving surface, the second driving surface abuts against the first driving surface, and the rotating operating member can be operated to push the first driving surface through the second driving surface, thereby driving the rotating locking member to switch to the second unlocking position; or, the rotating locking member is provided with a plug-in slot, the side wall of the plug-in slot forms the first driving surface, the rotating operating member includes a plug-in portion, the side surface of the plug-in portion forms the second driving surface, the second driving surface is inclined relative to the extension direction of the rotating locking member, the plug-in portion is plug-fitted with the plug-in slot, and the second driving surface abuts against the first driving surface.

According to one embodiment, the bracket assembly is provided with a receiving hole, the adjusting seat is at least partially received in the receiving hole, the rotating operating member is movably connected to the adjusting seat, and the rotating operating member is at least partially exposed from the receiving hole for operation.

According to one embodiment, the rotation adjustment mechanism further includes: a rotation reset member, suitable for biasing the rotation locking member to move the rotation locking member toward the second locking position.

According to one embodiment, the rotating locking members are arranged in pairs, and the rotating reset member is connected or abutted between the two rotating locking members in the pair to bias the two rotating locking members simultaneously.

According to one embodiment, the bracket assembly includes a leg base connected to the multiple legs, the seat assembly is installed on a seat plate, and the seat plate and the leg base are connected to be rotatable relative to each other; the rotation adjustment mechanism is arranged between the leg base and the seat plate, and when the rotation adjustment mechanism is in a released state, the seat plate can rotate relative to the leg base; when the rotation adjustment mechanism is in a locked state, the seat plate cannot rotate relative to the leg base.

According to one embodiment, the rotation adjustment mechanism includes: a positioning member having a third locking position and a third releasing position; the leg seat is provided with a first positioning groove, and the seat plate is provided with a second positioning groove; when the rotation adjustment mechanism is in a locking state, the positioning member is in the third locking position, and the positioning member is simultaneously engaged with the first positioning groove and the second positioning groove; when the rotation adjustment mechanism is in a releasing state, the positioning member is in the third releasing position, and the positioning member is disengaged from at least one of the first positioning groove and the second positioning groove.

According to one embodiment, the positioning member includes a positioning portion for engaging with the second positioning groove and the first positioning groove, and the cross-section of the positioning portion is a non-circular rotationally symmetrical figure; and/or the rotation adjustment mechanism further includes a positioning reset member, which is suitable for biasing the positioning member to move toward the third locking position, and the positioning reset member abuts or is connected between the positioning member and the leg seat.

According to one embodiment, the rotation adjustment mechanism further includes a positioning operating member, which is drivingly connected to the positioning member, and the positioning operating member is operably arranged on the leg seat, and the positioning operating member can be operated to drive the positioning member to move to the third release position.

According to one embodiment, the positioning operating member is arranged on a side of the leg seat away from the first positioning groove, and the positioning operating member is connected to the positioning member through a fastener.

According to one embodiment, the seat plate is provided with a first receiving groove, and the leg seat is provided with a rotating connection part, at least a portion of the rotating connection part is received in the first receiving groove and abuts against the side wall of the first receiving groove, so that the seat plate can rotate around the rotation axis relative to the leg seat.

According to one embodiment, the seat plate includes a first seat plate and a second seat plate, the first seat plate is provided with the first receiving groove, the second seat plate is arranged at the groove opening of the first receiving groove, an opening is formed between the second seat plate and the first seat plate, and at least a portion of the rotating connection portion extends into the opening and is clamped on the groove wall of the first receiving groove.

According to one embodiment, the seat plate includes a first seat plate and a second seat plate, the first seat plate and the second seat plate are combined to form a first receiving groove, a connecting rod is inserted in the first receiving groove, and the part of the connecting rod extending from the first receiving groove is connected to the backrest; and/or, the bracket assembly further includes a roller, the roller is rotatably arranged on the leg seat, the roller is provided with a first inclined surface, and the seat plate is provided with a second inclined surface around the rotation axis of the seat plate, and the second inclined surface is in rolling contact with the first inclined surface.

According to one embodiment, the positioning operating member is rotatably disposed on the leg support seat, the leg support seat is provided with a positioning rib, and the positioning operating member is provided with a retaining rib, and the retaining rib abuts against the positioning rib to keep the positioning member in the third unlocking position.

In yet another aspect, the present invention provides a chair comprising the above-mentioned height adjustment mechanism and/or the above-mentioned seat adjustment device and/or the above-mentioned rotation adjustment mechanism.

Yet another aspect of the present invention provides a chair, comprising a support assembly, wherein the support assembly comprises a plurality of legs and a folding mechanism, wherein the folding mechanism is used to open or fold the plurality of legs.

According to one embodiment, the folding mechanism includes: an adjustment seat; a plurality of connecting members and at least one second locking member mounted on the adjustment seat; wherein the adjustment seat is slidably connected to the plurality of legs via the plurality of connecting members; the at least one second locking member is used to engage with at least one of the legs to lock the relative position of the adjustment seat and the at least one of the legs.

According to one embodiment, two or more locking grooves are provided on the at least one leg, and the two or more locking grooves are arranged at intervals along the length direction of the at least one leg to selectively engage with the at least one second locking member.

According to one embodiment, the chair further includes a second release member, which is mounted on the adjustment seat and operably connected to the at least one second locking member; and/or each of the connecting members has a slot, each of the legs is provided with a sliding rail, and each of the connecting members is slidably connected to the sliding rail on the corresponding leg through its slot.

According to one embodiment, the bracket assembly includes a base, the base has a slide extending in the vertical direction; the multiple legs are respectively pivotally connected to the base; the folding mechanism includes: a first sliding member, which slidably cooperates with the slide; multiple connecting members, which are connected between the first sliding member and the multiple legs; when the first sliding member moves along the slide, the multiple connecting members drive the multiple legs to expand or fold synchronously.

According to one embodiment, the folding mechanism further includes: a stabilizer, connected to the first sliding member through at least one connecting member to allow the stabilizer to move in the vertical direction along with the first sliding member; and the stabilizer has a rotation axis parallel to the vertical direction; at least one first motion conversion mechanism is arranged between the stabilizer and the base; when the stabilizer moves in the vertical direction, each of the first motion conversion mechanisms drives the stabilizer to rotate around the rotation axis relative to the first sliding member.

According to one embodiment, one of the stabilizer and the first sliding member is provided with at least one arc-shaped hole, and the other is provided with at least one through hole; the at least one connecting member is inserted into the at least one arc-shaped hole and the at least one through hole along the vertical direction; or, the at least one connecting member includes at least two snap hooks extending from the stabilizer or the first sliding member, and each of the snap hooks extends in the vertical direction.

According to one embodiment, each of the first motion conversion mechanisms includes: a first driving chute, which is disposed on one of the base and the stabilizer; and a first driving pin, which is disposed on the other of the base and the stabilizer and slidably cooperates with the first driving chute.

According to one embodiment, the slideway is formed by a column portion extending in the vertical direction, and the first sliding member is sleeved on the outside of the column portion.

According to one embodiment, the slideway is formed by a column portion extending in the vertical direction, the first sliding member and the stabilizer are both sleeved on the outside of the column portion, and the at least one first motion conversion mechanism is arranged between the stabilizer and the column portion.

According to one embodiment, the folding mechanism further includes: at least one locking member, which is mounted to the base and used to lock the first sliding member to limit the movement of the first sliding member relative to the slideway.

According to one embodiment, the folding mechanism further includes: at least one release member, operably connected to the at least one locking member, for driving the at least one locking member to release the first sliding member; and/or, at least one elastic member, for driving the at least one locking member to lock the first sliding member.

According to one embodiment, the first sliding member includes at least one locking portion, each of which includes a locking recess; each of the locking members includes a plurality of locking protrusions extending in a transverse direction, and the plurality of locking protrusions are arranged at intervals in the vertical direction; the locking recess selectively cooperates with the plurality of locking protrusions to lock the first sliding member at different positions of the slideway.

According to one embodiment, the first sliding member includes at least one locking portion, each of the locking portions includes a plurality of locking recesses, and the plurality of locking recesses are arranged at intervals in the vertical direction; each of the locking members includes a locking protrusion extending along the transverse direction; the plurality of locking recesses selectively cooperate with the locking protrusion to lock the first sliding member at different positions of the slideway.

According to one embodiment, each of the release members is mounted on the base and can move in the vertical direction; a second motion conversion mechanism is provided between each of the release members and each of the locking members, and the second motion conversion mechanism is used to convert the movement of each of the release members in the vertical direction into the movement of each of the locking members in the lateral direction, so as to allow each of the locking members to lock or release the first sliding member.

According to one embodiment, the second motion conversion mechanism includes: a second driving inclined groove, which is arranged on one of the release member and the locking member; and a second driving pin, which is arranged on the other of the release member and the locking member and slidingly cooperates with the second driving inclined groove.

According to one embodiment, the base includes a receiving cavity, the slideway, the first sliding member and the stabilizing member are located in the receiving cavity, and the base is provided with a plurality of first through grooves communicating with the receiving cavity; the first ends of the plurality of connecting members pass through the plurality of first through grooves and are pivotally connected to the first sliding member; and/or, the plurality of legs are respectively provided with a cover body, each of the covers is provided with a second through groove; the second end of each of the connecting members passes through the second through groove and is pivotally connected to each of the legs.

According to one embodiment, the bracket assembly is installed on the seat plate, and the multiple legs are constructed to pivot relative to the seat plate to enable the chair to switch between a high position and a low position; the bracket assembly also includes a foot pedal, which is movably connected to the multiple legs, and the foot pedal can move between a first position and a second position and drive the multiple legs to pivot, when the foot pedal is in the first position, the multiple legs are unfolded to make the chair in a low position, and when the foot pedal is in the second position, the multiple legs are folded to make the chair in a high position.

According to one embodiment, each of the legs is provided with a second sliding member, and the second sliding member is pivotally connected to the pedal member so that the pedal member can slide between the first position and the second position together with the second sliding member.

According to one embodiment, the folding mechanism includes: a locking member movably disposed on at least one of the multiple legs, and the locking member can switch between a fourth locking position and a fourth release position; an engaging hole disposed on the second sliding member; when the folding mechanism is in a locked state, the locking member is in the fourth locking position, and the locking member engages with the engaging hole to lock the second sliding member relative to the leg; when the folding mechanism is in a release state, the locking member is in the fourth release position, and the locking member is disengaged from the engaging hole.

According to one embodiment, the folding mechanism further includes: a driving member, wherein the driving member and one of the engaging members are provided with a driving groove, and the driving member and the other of the engaging members are provided with a driving pin, wherein the extension direction of the driving groove is inclined relative to the moving direction of the engaging member, and the driving pin is plugged into and fits with the driving groove and can move along the driving groove to drive the engaging member to move between the fourth locking position and the fourth releasing position.

According to one embodiment, the folding mechanism further includes: a fixed seat fixedly arranged on at least one of the multiple legs; the fixed seat is provided with a guide groove, the guide groove extends parallel to the moving direction of the driving member, the driving pin is plugged into and matched with the guide groove and can move along the guide groove; and/or, a folding and resetting member, suitable for biasing the driving member so that the driving member drives the engaging member to move toward the fourth locking position.

According to one embodiment, the folding mechanism further includes: a folding operating member, which can be movably arranged on the bracket assembly; and a pulling member, one end of the pulling member is connected to the driving member, and the other end of the pulling member is connected to the folding operating member; wherein the folding operating member can be operated to drive the driving member to move through the pulling member to drive the engaging member to move from the fourth locking position to the fourth releasing position.

According to one embodiment, the multiple legs have a hollow inner cavity, and at least a portion of the folding mechanism is accommodated in the hollow inner cavity; and/or, at least one of the multiple legs is provided with a first limit member, and the first limit member is suitable for abutting against the second sliding member to limit the pedal member from sliding upward from the first position; and/or, at least one of the multiple legs is provided with a second limit member, and the second limit member is suitable for abutting against the second sliding member to limit the pedal member from sliding downward from the second position.

According to one embodiment, each of the legs includes a first leg and a second leg, one end of the first leg is connected to the seat plate, and the other end of the first leg is detachably connected to the second leg.

According to one embodiment, the chair further includes a seat disassembly mechanism, and the seat assembly is detachably connected to the mounting seat through the seat disassembly mechanism, and the seat disassembly mechanism includes: a locking hole, which is arranged on the mounting seat; and a disassembly locking piece, which is arranged on the seat assembly, and the disassembly locking piece has a hook portion and can move between a third position and a fourth position; wherein, when the disassembly locking piece is located at the third position, the hook portion engages with the locking hole so that the seat assembly is fixed relative to the mounting seat, and when the disassembly locking piece is located at the fourth position, the hook portion is disengaged from the locking hole so that the seat assembly can be separated relative to the mounting seat.

According to one embodiment, the mounting seat is provided with a connecting groove, the engaging hole is provided on the side wall of the connecting groove and is connected to the connecting groove, the disassembly locking piece is plugged into and matched with the connecting groove, and the disassembly locking piece can move in a direction parallel to the bottom wall of the connecting groove to achieve movement between the third position and the fourth position.

According to one embodiment, the seat disassembly mechanism further includes: an engaging recess, which is arranged on the mounting seat; a disassembly release member, which is operably arranged on the seat assembly, and the disassembly release member has an engaging protrusion, and the disassembly release member can switch between a sixth release position and a sixth locking position; wherein, when the disassembly release member is located at the sixth locking position, the engaging protrusion can engage with the engaging recess to limit the disassembly lock member to the third position, and when the disassembly release member is located at the sixth release position, the engaging protrusion is disengaged from the engaging recess, so that the disassembly lock member can switch between the third position and the fourth position; a disassembly reset member, which is suitable for biasing the disassembly release member to move the disassembly release member toward the sixth locking position.

According to one embodiment, the seat assembly is provided with a receiving hole, and the engaging protrusion of the disassembly release member can pass through the receiving hole and engage with the engaging recess, and the end of the disassembly release member away from the engaging protrusion is provided with an operating recess, and the operating recess at least partially extends out of the receiving hole.

According to one embodiment, the seat assembly is provided with a second receiving groove, the disassembly release member also has an abutment portion, at least a portion of the abutment portion is received in the second receiving groove, the disassembly reset member is received in the second receiving groove, and the two ends of the disassembly reset member abut against the groove wall of the second receiving groove and the abutment portion respectively.

According to one embodiment, the bracket assembly is installed on a seat plate, and the seat plate is provided with a backrest; the seat assembly includes a seat and a backrest portion, and the backrest portion is provided with a first connecting member, and the seat assembly is detachably connected to the backrest via the first connecting member; when the seat assembly is connected to the backrest, the chair has a first usage state; when the seat assembly is separated from the backrest, the chair has a second usage state.

According to one embodiment, the backrest is provided with a connecting hole, and the first connecting member is rotatably arranged on the seat assembly and can be switched between a fifth locking position and a fifth releasing position; wherein, when the first connecting member is located at the fifth releasing position, the first connecting member can move along the extension direction of the connecting hole; the first connecting member can be rotated to the fifth locking position, and when the first connecting member is in the fifth locking position, the seat assembly and the first connecting member can be respectively located on both sides of the backrest and the first connecting member abuts against the backrest, so that the seat assembly and the backrest are relatively fixed.

According to one embodiment, the backrest portion is provided with a connecting protrusion that can be plugged into the connecting hole, and the first connecting member is rotatably connected to the connecting protrusion; and/or, a second connecting member is provided at the bottom of the seat assembly, the second connecting member extends downward and forms a connecting groove, and the second connecting member is structured to engage with the seat plate through the connecting groove.

According to one embodiment, a positioning protrusion is provided on the back side of the backrest, and a positioning recess is correspondingly provided on the first connecting member, and when the first connecting member is located in the fifth locking position, the positioning protrusion engages with the positioning recess; and/or, a recess is provided on a side of the backrest facing away from the seat assembly, and when the first connecting member is in the fifth locking position, the first connecting member abuts against the bottom wall of the recess.

According to one embodiment, the seat assembly includes a seat and a dining tray, and the dining tray is connected to the seat via a dining tray adjustment mechanism, and the dining tray adjustment mechanism includes: a plurality of gear slots, which are arranged on the side of the seat; and a dining tray release, which has a locking portion, and the dining tray release is movably arranged on the dining tray and has a seventh locking position and a seventh releasing position; wherein, when the dining tray release is located at the seventh locking position, the locking portion is engaged with at least one of the plurality of gear slots to fix the dining tray on the seat, and when the dining tray release is located at the seventh releasing position, the locking portion is disengaged from the plurality of gear slots, so that the dining tray can be separated from the seat or can move relative to the seat.

According to one embodiment, the dinner plate has a front side capable of bearing a load and a back side facing away from the front side, the dinner plate release is arranged on the back side, and the dinner plate release also has a second operating portion, the second operating portion protrudes from the engaging portion and extends away from the back side; and/or, the dinner plate adjustment mechanism further includes an adjustment reset member, the adjustment reset member is arranged between the dinner plate release member and the dinner plate, and the adjustment reset member is suitable for biasing the dinner plate release member to move the dinner plate release member toward the seventh locking position.

According to one embodiment, one of the meal tray and the meal tray release latch is provided with a strip groove, and the other of the meal tray and the meal tray release latch is provided with a connecting pin, and the connecting pin is plugged into and matched with the strip groove; and/or, the meal tray is provided with a connecting plate, and the connecting plate is provided along the front-rear direction of the chair, and the connecting plate is provided with a hole, and the engaging portion can pass through the hole to engage or disengage with the multiple gear grooves; and/or, the meal tray is also provided with a limiting portion, and the limiting portion can abut against the side of the seat to limit the movement of the meal tray.

First Embodiment

Referring to FIG. 1 , there is shown a three-dimensional diagram of a chair (more specifically a high chair 1000) provided in an embodiment of the present invention, which is applied with a height adjustment mechanism 2 and a folding mechanism 7 provided in an embodiment of the present invention. When the structure of the high chair 1000 is described below, the structures of the height adjustment mechanism 2 and the folding mechanism 7 will also be described.

1 , a high chair 1000 includes a seat assembly 100 and a support assembly 200, wherein the seat assembly 100 is attached to the support assembly 200. The seat assembly 100 provides a seating position for a child, and the support assembly 200 is used to support the seat assembly 100 at a certain height. The height of at least one of the seat assembly 100 and the support assembly 200 is adjustable, so that the height of the high chair 1000 can be adjusted to adapt to different table heights at home.

Referring to FIG. 1 , a seat assembly 100 includes a seat 1. The seat 1 has a surface for a child to sit on. In some embodiments, the seat 1 may be selectively provided with a dining tray 12, a backrest 13, a footrest 14, a safety belt 16, etc. A support assembly 200 includes a base 5 and a plurality of legs 6, the upper ends of the plurality of legs 6 being pivotally connected to the base 5, and the lower ends of the plurality of legs 6 being supported by the ground. It should be noted that the number of the plurality of legs 6 of the support assembly 200 is not limited to the four shown in the figure, and in alternative embodiments, it may be, for example, three or more. In addition, in some alternative embodiments, the plurality of legs 6 may be pivotally connected to the base 5 in groups of two through the same pivot. In addition, in an alternative embodiment, the connection method between the upper ends of the multiple legs 6 and the base 5 is not limited to hinged. For example, the upper end of each leg 6 is slidably connected to the base 5 and can be extended or retracted in the horizontal direction.

Referring to FIG. 1 , the seat 1 is indirectly mounted on the base 5 via the height adjustment mechanism 2, so that the seat assembly 100 is supported by the bracket assembly 200. Of course, the installation method of the seat assembly 100 and the bracket assembly 200 is not limited to the above examples. For example, in some alternative embodiments, the seat assembly 100 can omit the height adjustment mechanism 2, and the seat 1 can be directly connected to the base 5 so as to be relatively rotatable, or the seat 1 can be directly fixedly connected to the base 5. In some alternative embodiments, the base 5 can be further omitted, and the upper ends of the plurality of legs 6 can be directly connected to the seat 1.

There are many ways to adjust the height of the high chair 1000. For example, in some embodiments not shown, the length of each leg 6 itself is retractable, so that the height of the support assembly 200 can be adjusted, and thus the height of the high chair 1000 can be adjusted. More specifically, each leg 6, for example, includes at least two telescopic legs that are sequentially sleeved and a locking mechanism for releasing or locking the relative movement of these telescopic legs. When the height of the high chair 1000 needs to be adjusted, the telescopic legs are released and the length of the telescopic legs is adjusted to the desired length and then locked again.

Continuing to refer to FIG. 1 , in some embodiments, the height of the seat 1 can be adjusted by using a height adjustment mechanism 2, thereby adjusting the height of the high chair 1000. The height adjustment mechanism 2 may include a support seat 27, two adjustment members 21 arranged opposite to each other in the first horizontal direction H1, and the above-mentioned seat (also referred to as a movable member) 1. The upper end of each adjustment member 21 is movably connected to the seat 1, and the lower end of each adjustment member 21 is pivotally connected to the support seat 27 through a first axis 31, and the support seat 27 supports the seat 1 through the two adjustment members 21. The axial direction of the first axis 31 is perpendicular to the first horizontal direction H1. In the embodiment shown in FIG. 1 , the support seat 27 is rotatably mounted on the base 5. By controlling the support base 27 to rotate relative to the base 5, the orientation of the chair 1 can be easily adjusted without moving the high chair 1000 as a whole. In some alternative embodiments, the base 5 can be used as the support base 27 pivoted with each adjustment member 21, that is, the base 5 and the support base 27 are a single piece and fixed to each other. In some embodiments, the base 5 and the support base 27 are, for example, a single-piece molded member, and the height adjustment mechanism 2 accordingly may not be provided with a separate support base 27 outside the base 5.

Refer to the partial front view of the high chair 1000 shown in Figures 2 and 3. The connection between the upper ends of the two adjustment members 21 and the seat 1 forms two connection points P1 and P2, and the connection point P1 corresponds to the connection point between one adjustment member 21 and the seat 1, and the connection point P2 corresponds to the connection point between the other adjustment member 21 and the seat 1. By controlling the two adjustment members 21 to rotate around the corresponding first axis 31, the positions of the two connection points P1 and P2 relative to the corresponding adjustment members 21 do not change, but the positions of the two connection points P1 and P2 relative to the corresponding seats 1 do change. More specifically, the two connection points P1 and P2 located at the upper ends of the two adjustment members 21 are away from or close to each other along the seat 1 in the first horizontal direction H1. As each adjusting member 21 rotates, the position of the connection points P1 and P2 between each adjusting member 21 and the seat 1 will rise or fall accordingly in the vertical direction V, thereby raising or lowering the seat 1. In some embodiments, during the process of the two adjusting members 21 rotating around the corresponding first axis 31, the distance between the upper ends of the two adjusting members 21 is always smaller than the distance between the lower ends. That is, the two adjusting members 21 support the seat 1 in an arched posture, providing reliable support for the seat 1. At this time, when the upper ends of the two adjusting members 21 are away from each other, the seat 1 rises; when the upper ends of the two adjusting members 21 are close to each other, the seat 1 falls.

Continuing to refer to FIG. 2 and FIG. 3 , in some embodiments, the seat 1 has a first height G1 and a second height G2 relative to the support seat 27, and the first height G1 is greater than the second height G2. The height of the seat 1 relative to the support seat 27 is based on the vertical distance of the connection between the adjustment member 21 and the seat 1 relative to the first axis 31. When the seat 1 is at the first height G1, the connection points P1, P2, P3, and P4 between the support seat 27, the seat 1, and the two adjustment members 21 define a first area S1 (the first area S1 is enclosed by a dotted line in FIG. 2 ). As described above, the two connection points P1 and P2 are formed at the connection between the seat 1 and the two adjustment members 21. The connection points P3 and P4 are formed at the connection between the support seat 27 and the two adjustment members 21. In some embodiments, the two first axes 31 correspond to the connection points P3 and P4. When the seat 1 is at the second height G2, the support seat 27, the seat 1, and the connection points P1 to P4 between the two adjustment members 21 define a second area S2 (the second area S2 is enclosed by a dotted line in FIG3 ). The first area S1 is larger than the second area S2. That is, when the height of the seat 1 relative to the support seat 27 is reduced, the area defined by the connection points P1, P2, P3, and P4 between the support seat 27, the seat 1, and the two adjustment members 21 tends to decrease. On the contrary, when the height of the seat 1 relative to the support seat 27 increases, the area defined by the connection points P1, P2, P3, and P4 between the support seat 27, the seat 1, and the two adjustment members 21 tends to increase.

It should be noted that in some alternative embodiments, when the two adjustment members 21 are controlled to rotate around the corresponding first axis 31, the positions of the two connection points P1 and P2 relative to their respective corresponding seats 1 do not change, but the positions of the two connection points P1 and P2 relative to their respective corresponding adjustment members 21 change, so that the seat 1 can also be raised or lowered.

Referring to Fig. 4 and Fig. 5, Fig. 4 shows a rear perspective view of the high chair 1000, and Fig. 5 is a U1-U1 cross-sectional view of the high chair 1000 shown in Fig. 2. The high chair 1000 may further include a rotation adjustment mechanism for locking the relative positions of the support seat 27 and the base 5. In some embodiments, the rotation adjustment mechanism includes a third locking member 275 to prevent the seat 1 from rotating arbitrarily when the child is having a meal. In some embodiments, the third locking member 275 can be movably mounted on the support seat 27 in the vertical direction V, and the support seat 27 has an outwardly protruding operating portion 2751, and the support seat 27 has a longitudinal hole 270 for the operating portion 2751 to pass through. The base 5 is provided with one, two or more positioning holes 50 along the circumference, and the plurality of positioning holes 50 are, for example, evenly arranged in the circumference, and the axial direction of each positioning hole 50 is parallel to the vertical direction V. When the third locking member 275 is inserted into a positioning hole 50, the support seat 27 is locked at a position. When the orientation of the seat 1 needs to be adjusted, the third locking member 275 is lifted up until it exits the currently inserted positioning hole 50, and then the seat 1 is rotated to a suitable position, and then the third locking member 275 is inserted into another positioning hole 50. In some alternative embodiments, the positions of the third locking member 275 and the positioning hole 50 on the support seat 27 and the base 5 can be interchanged. In some alternative embodiments, the third locking member 275 can be moved in the horizontal direction to insert into or exit from the horizontally extending positioning hole 50. It should be noted that in some alternative embodiments, the above-mentioned adjustment member 21 may not be provided between the support seat 27 and the seat 1, and the support seat 27 may be integrated with the seat 1, or the support seat 27 may be attached to the seat 1 by means of screws, rivets, or clamping. In this case, the high chair 1000 may also be provided with a third locking member 275 to allow the circumferential position of the seat 1 relative to the base 5 to be adjustable.

Referring to FIG. 5 , in some embodiments, a fourth elastic element 44 may be disposed between the support seat 27 and the third locking member 275. The fourth elastic element 44 is used to drive the third locking member 275 to engage with the positioning hole 50, so as to prevent the third locking member 275 from being accidentally hit and withdrawing from the positioning hole 50. Of course, in some alternative embodiments, the fourth elastic element 44 may not be disposed. It can be understood that when the third locking member 275 is disposed on the base 5, the fourth elastic element 44 is disposed between the base 5 and the third locking member 275.

See Figures 4 and 6, Figure 6 shows a U2-U2 cross-sectional view of the high chair 1000 shown in Figure 5. In some embodiments, the support seat 27 is provided with two support members 271 arranged opposite to each other in the first horizontal direction H1, the two support members 271 correspond to the two adjustment members 21 one by one, and the upper ends of the two support members 271 are pivotally connected to the lower ends of the two adjustment members 21 through the first shaft 31. As can be seen from Figure 6, the two support members 271 extend upward from the support seat 27, and the upper end distance between the two support members 271 is greater than the lower end distance, which is conducive to reducing the radial dimension of the support seat 27. In some embodiments, the two support members 271 and the support base 27 can be integrally formed.

Referring to the three-dimensional view of the adjustment member 21 shown in FIG7 , in some embodiments, each adjustment member 21 includes a pair of connecting arms 211 arranged opposite to each other in the second horizontal direction H2, and the second horizontal direction H2 is perpendicular to the first horizontal direction H1 (see FIG1 ). The upper ends of the pair of connecting arms 211 are movably connected to the seat 1, and the lower ends of the pair of connecting arms 211 are pivotally connected to the support seat 27 through the first axis 31. At least one of the two opposite surfaces of the pair of connecting arms 211 is provided with a slide groove 2111, and the seat 1 is provided with a boss 102 that slidably cooperates with the slide groove 2111 (see FIG9 ). Through the cooperation between the slide groove 2111 and the boss 102, the range of movement of each adjustment member 21 relative to the seat 1 is limited. In some embodiments, each adjusting member 21 further includes a side plate 212 , and the side plate 212 is connected between a pair of connecting arms 211 , which is beneficial to the rotation consistency of the pair of connecting arms 211 .

Referring to Figures 6 to 8, Figure 8 shows a three-dimensional view of the support seat 27. In some embodiments, in a pair of corresponding support members 271 and adjustment members 21, the upper end of the support member 271 is provided with a mounting hole 2710, and the lower end of the adjustment member 21 is provided with a first shaft 31, and the first shaft 31 is pivotally connected to the mounting hole 2710, so that the adjustment member 21 is pivotally connected to the support member 271 through the first shaft 31. In some alternative embodiments, the positions of the mounting hole 2710 and the first shaft 31 on the upper end of the support member 271 and the lower end of the adjustment member 21 can be interchanged.

Referring to FIG. 7 and FIG. 8 , in some embodiments, an angle limiting mechanism 28 is provided between the adjusting member 21 and the supporting member 271, and the angle limiting mechanism 28 is used to limit the rotation angle range of the adjusting member 21 to ensure that the height adjustment operation of the seat 1 is controllable. In some embodiments, the angle limiting mechanism 28 may include a first arcuate groove 281 and an elastic telescopic pin 282. The first arcuate groove 281 is provided on the hole wall of the mounting hole 2710 and extends in the circumferential direction, and the elastic telescopic pin 282 is provided on the first shaft 31 and can be extended and retracted in the radial direction of the first shaft 31. When the first shaft 31 is installed in the mounting hole 2710, the elastic telescopic pin 282 is inserted into the first arcuate groove 281. In order to facilitate the elastic telescopic pin 282 to be inserted into the first arc groove 281, the hole wall of the mounting hole 2710 may be provided with an inclined surface 2712, and the inclined surface 2712 is used to guide the elastic telescopic pin 282 to be inserted into the first arc groove 281. Of course, in other embodiments, the angle limiting mechanism 28 may also have other implementation methods, as long as the rotation angle range of the adjustment member 21 can be limited.

Referring to FIG6 , the height adjustment mechanism 2 may further include two first locking members 22, and the two first locking members 22 correspond to the two adjusting members 21 one by one. Each first locking member 22 is used to lock the relative position between the corresponding adjusting member 21 and the seat 1, thereby locking the seat 1 at the adjusted height. In some embodiments, each first locking member 22 may be directly or indirectly disposed at the upper end of the corresponding adjusting member 21. When each adjusting member 21 moves into place, each first locking member 22 is snapped into the snap-in slot 101 on the seat 1, thereby locking the relative position between each adjusting member 21 and the seat 1.

See FIG. 6 and FIG. 9 , FIG. 9 shows a bottom perspective view of the seat 1 of the high chair 1000 . In some embodiments, the bottom of the seat 1 may be provided with a plurality of slots 101 , and the plurality of slots 101 are arranged along the first horizontal direction H1 . The first part (two, three or more slots 101 ) of the plurality of slots 101 corresponds to a first locking member 22 , and the second part (two, three or more slots 101 ) of the plurality of slots 101 corresponds to another first locking member 22 . The first part of the slots 101 and the second part of the slots 101 are symmetrically arranged. Each first locking member 22 moves in the vertical direction V to engage or disengage with the corresponding slot 101 at the bottom of the seat 1 , respectively. When the first locking member 22 is engaged with the slot 101, the first locking member 22 is in a locked position. When the first locking member 22 is disengaged from the slot, the first locking member 22 is in a released position. In addition, each first locking member 22 moves in the first horizontal direction H1 to correspond to a different slot 101. In an alternative embodiment, the layout of the plurality of slots 101 and the movement of the first locking member 22 may also be in other ways. For example, the plurality of slots 101 may be provided on a vertically extending side wall (e.g., the side wall 11) of the seat 1, and the first locking member 22 is engaged with or disengaged from the slot 101 by moving in the second horizontal direction H2.

See FIG. 6 and FIG. 11 , FIG. 11 is a top perspective view of some components of the height adjustment mechanism 2. In some embodiments, the height adjustment mechanism 2 further includes two sliders 23 that are slidably matched with the seat 1, and the two sliders 23 are respectively connected to the upper ends of the two adjustment members 21 through second axes 32, and the second axes 32 are parallel to the first axis 31. In some embodiments, the two second axes 32 correspond to the connection points P1 and P2. In some embodiments, each slider 23 is respectively provided with a through hole 2301, and the upper end of the connecting arm 211 of each adjustment member 21 is provided with a through hole 2110, and each second axis 32 passes through the corresponding through hole 2301 and through hole 2110. The two slide blocks 23 correspond to the two first locking members 22 one by one, and each first locking member 22 is movably connected to the corresponding slide block 23. Referring to FIG6, when each first locking member 22 is disengaged from the corresponding locking slot 101, the two adjustment members 21 are controlled to rotate in opposite directions around their respective first axes 31, and the upper ends of the two adjustment members 21 drive the two slide blocks 23 to move away from or toward each other in the first horizontal direction H1 through the second axis 32, and the seat 1 is raised or lowered accordingly. When the height of the seat 1 is adjusted to a suitable position, each first locking member 22 moves relative to the corresponding slider 23 along the vertical direction V and engages with the corresponding slot 101, i.e., the positions of the two sliders 23 are locked, and then the relative positions of each adjustment member 21 and the seat 1 are locked, and the seat 1 is locked at the adjusted height position. In some embodiments, each slider 23 has a cavity 230 (see FIG. 13 ), and each first locking member 22 is installed in the corresponding cavity 230, and the cavity 230 limits the first locking member 22 to move relative to the corresponding slider 23 in the vertical direction V.

See FIG. 6, FIG. 9, FIG. 11 and FIG. 12, FIG. 12 shows a bottom perspective view of the high chair 1000. In some embodiments, the bottom of the seat 1 includes, for example, two side walls 11 (shown in FIG. 9 and FIG. 12) arranged opposite to each other in the second horizontal direction H2 and a cover 15 covering the bottom of the two side walls 11. A plurality of slots 101 are located between the two side walls 11. The two ends of the cover 15 pass through a pair of connecting arms 211 of each adjusting member 21 and bend upward. The fastener (not shown) passes through the hole 151 (FIG. 12) on the cover 15 and is connected to the hole 105 (FIG. 9) of the seat 1. The bottom surface of the seat 1, the two side walls 11, and the cover 15 surround the accommodating chamber 10 (see FIG. 6). Two sliders 23 and two first locking members 22 are located in the receiving chamber 10. As described above, the two sliders 23 can move along the first horizontal direction H1 with the two first locking members 22. The second shafts 32 corresponding to each slider 23 extend from the two side walls 11 and are pivoted with the through holes 2110 at the upper ends of the corresponding adjusting members 21. Each side wall 11 of the receiving chamber 10 is provided with a first elongated hole 110 (see FIGS. 9 and 12 ) corresponding to the two ends of each second shaft 32, and the first elongated hole 110 extends along the first horizontal direction H1. By installing each slider 23 and each first locking member 22 in the receiving chamber 10, it is possible to prevent the external environment from interfering with the normal movement of each slider 23. The cooperation between each second shaft 32 and the corresponding first elongated hole 110 also limits the movement range of each adjusting member 21 relative to the seat 1 .

Referring to FIG. 10 , which is a three-dimensional diagram showing the first locking member 22 and related parts, the height adjustment mechanism 2 may further include a first elastic element 41, which is used to drive each first locking member 22 to engage with the seat 1. The first elastic element 41 may include a spring installed in a cavity 230 (see FIG. 13 ) of each slider 23, and the spring is clamped between the slider 23 and the corresponding first locking member 22.

6, 10 and 11, in order to facilitate the operation of each first locking member 22, in some embodiments, the height adjustment mechanism 2 further includes two first driving members 24, and the two first driving members 24 correspond to the two first locking members 22. Each first driving member 24 is drivingly connected with the corresponding first locking member 22, so that each first driving member 24 moves in the first horizontal direction H1 when subjected to an external force F1, and drives the corresponding first locking member 22 to move downward and disengage from the locking groove 101 of the seat 1.

There are many ways to convert the horizontal movement of each first driving member 24 into the downward movement of the corresponding first locking member 22. Referring to Figures 10, 13 and 14, in some embodiments, each first locking member 22 has a through hole 220 (see Figure 14), in which a first pin 221 is installed, and the first pin 221 is parallel to the first axis 31. In some embodiments, each slider 23 has an elongated hole 2302 extending along the vertical direction V (see Figure 14), and the first pin 221 and the elongated hole 2302 are slidably matched. Each first driving member 24 is respectively provided with a hole 240, and each first pin 221 passes through the corresponding hole 240. Each hole 240 has a driving inclined surface 241 (see Figure 10), and the driving inclined surface 241 abuts against the corresponding first pin 221. Referring to FIG. 6 and FIG. 10 , when each first driving member 24 is subjected to an external force F1 and moves in the first horizontal direction H1, its driving inclined surface 241 pushes the corresponding first pin 221 to move downward, and each first pin 221 drives the corresponding first locking member 22 to disengage from the clamping slot 101. When the external force F1 is withdrawn, the first elastic element 41 drives each first driving member 24 to move upward and clamp with the corresponding clamping slot 101. In some alternative embodiments, the hole 240 can be designed as an oblique long hole, and the first elastic element 41 can be omitted. By applying a force in the opposite direction of the external force F1 to each first driving member 24, the corresponding first pin 221 can be pushed upward, so that each first locking member 22 is clamped with the corresponding clamping slot 101. In some alternative embodiments, the positions of the first pin 221 and the hole 240 having the driving slope 241 on the first locking member 22 and the first driving member 24 can be interchanged.

Referring to Figures 11 to 14, Figures 13 and 14 show exploded views of the high chair in two directions. In some embodiments, the height adjustment mechanism 2 may further include two first release members 25, the two first release members 25 correspond to the two first driving members 24 one by one, and each first release member 25 is operably connected to the corresponding first driving member 24. The caregiver can use the two first release members 25 to conveniently apply the external force F1 to each first driving member 24. In some embodiments, referring to Fig. 11 and Fig. 13, the inner surface of the cover 15 is provided with two protrusions 152 spaced apart in the second horizontal direction H2, and the portion of each first release member 25 located in the accommodating chamber 10 has an elongated hole 250, and the two protrusions 152 are respectively slidably matched with the elongated holes 250 of the two first release members 25 to guide the two first release members 25 to slide in the first horizontal direction H1. In some embodiments, referring to Fig. 14, the cover 15 is provided with two through holes 150, and each first release member 25 includes an operating portion 252, and the operating portions 252 of the two first release members 25 extend from the two through holes 150 and are slidably matched with the two through holes 150 to guide the two first release members 25 to slide in the first horizontal direction H1. The caregiver can conveniently apply the external force F1 ( FIG. 10 ) to each first driving member 24 through the operating portion 252 of each first releasing member 25. In some alternative embodiments, the height adjustment mechanism 2 may include a releasing member 25, such as a knob, which is operably connected to the two first driving members 24 at the same time to drive the two first driving members 24 to move in the first horizontal direction H1.

Referring to FIG. 11 , in some embodiments, each first release member 25 is connected to the corresponding first driving member 24 via a first traction member 261, and each first release member 25 drives the corresponding first driving member 24 to move in the first horizontal direction H1 via the first traction member 261. The first traction member 261 may be a wire rope, a flexible belt, etc. One end of the first traction member 261 is connected to the mounting portion 242 (see FIG. 10 ) of the first driving member 24, and the other end is connected to the mounting portion 251 of the first release member 25. In some embodiments, each first pulling member 261 is covered with a protective cover 262 , one end of the protective cover 262 can be mounted on the mounting portion 231 of the slider 23 , and the other end of the protective cover 262 can be mounted on the protrusion 152 .

The working process of adjusting the height of the seat 1 by the height adjustment mechanism 2 will be described below with reference to FIG. 6 and FIG. 11 .

6 and 10 , the seat 1 is supported at a certain height by the height adjustment mechanism 2, and the two first locking members 22 are engaged with the corresponding slots 101. The caregiver applies an external force F1 to the operating parts 252 of the two first release members 25, and the two first release members 25 pull the two first driving members 24 to move toward each other in the first horizontal direction H1 through the two first traction members 261, and the driving inclined surfaces 241 of the two first driving members 24 push the two first pins 221 to move downward, so that the two first locking members 22 move downward and disengage from the slots 101. At this time, the seat 1 is pressed down or lifted up, and the seat 1 moves in the vertical direction. At the same time, the two sliders 23 drive the two first locking members 22 to move toward or away from each other in the first horizontal direction H1. When the height of the seat 1 is appropriate, the external force F1 is removed, and the two first locking members 22 automatically move up under the action of the first elastic element 41 and engage with the slot 101, thereby locking the seat 1 at the adjusted height. When the two first locking members 22 move up, they push the two first driving members 24 to reset, and the process of the two first driving members 24 returning to their original positions will drive the two first locking members 22 to reset.

It can be understood that, under the action of the protective cover 262, even if the first locking member 22 is engaged with different slots 101, the release stroke of the first release member 25 for releasing the first locking member 22 is the same as the distance that the first lead member 261 can slide in the protective cover 262. More specifically, the protective cover 262 is, for example, a rubber cover, and the two sliders 23 move toward or away from each other in the first horizontal direction H1, which will cause the protective cover 262 to deform. The first lead member 261 is bent or straightened as a whole as the protective cover 262 is deformed, but the sliding stroke of the first lead member 261 in the protective cover 262 is not affected. Therefore, no matter which slot 101 the first locking member 22 is engaged with, the first lead member 261 can be pulled to drive the first driving member 24 to move when the first release member 25 is operated. Similarly, when the external force is removed, the first locking member 22 will reset the first driving member 24, and then the first release member 25 will be reset through the first lead member 261.

13 and 14 , in some embodiments, the height adjustment mechanism 2 may further include a second elastic element 42, which is used to drive each first release member 25 to reset. In some embodiments, the second elastic element 42 includes, for example, two springs, which are in the accommodating cavity 10 (see FIG. 6 ) and clamped between the two first release members 25.

Refer to Figures 15 and 16, which are three-dimensional diagrams of the high chair 1000 when the folding mechanism 7 is in different states. In some embodiments, the upper end of each leg 6 is pivoted with the base 5. The folding mechanism 7 is used to change the state of the bracket assembly 200. In some embodiments, the folding mechanism 7 is connected to the plurality of legs 6, and the height of the base 5 is adjusted by controlling the opening degree of the plurality of legs 6, thereby adjusting the height of the seat 1. In some embodiments, the plurality of legs 6 have a minimum opening degree and a maximum opening degree. Referring to Figure 15, when the plurality of legs 6 are in the minimum opening degree, the sharp angle formed by each leg 6 and the vertical direction reaches the minimum, corresponding to the highest height of the base 5. On the contrary, referring to FIG. 16 , when the plurality of legs 6 are at the maximum extension, the sharp angle formed by each leg 6 and the vertical direction reaches the maximum, corresponding to the lowest height of the base 5. In some embodiments, when the plurality of legs 6 are at the minimum extension, it may correspond to the folded state of the support assembly 200. In some embodiments, the support assembly 200 can still stand on the ground when in the folded state. In some alternative embodiments, the plurality of legs 6 may also have one or more states between the maximum extension and the minimum extension, so that the base 5 has a plurality of adjustable heights.

Referring to Figures 15 and 16, in some embodiments, the folding mechanism 7 may include an adjustment seat 71 and a plurality of connecting members 72. The adjustment seat 71 is slidably connected to a plurality of legs 6 via the plurality of connecting members 72, so that the adjustment seat 71 can move along the vertical direction V, thereby controlling the synchronous opening or synchronous folding of each leg 6. In some alternative embodiments, the folding mechanism 7 may also have other implementations.

There are many ways to slidably connect each connector 72 to the corresponding leg 6. See FIG. 17 , which is a top view of the high chair. In some embodiments, each connector 72 is pivoted with the adjustment seat 71 via the third axis 33, and each connector 72 has a notch 721. Each leg 6 is provided with a slide rail 61, and each connector 72 is slidably connected to the slide rail 61 on the corresponding leg 6 via its notch 721. In some alternative embodiments, each connector 72 may include a sleeve structure, which is sleeved on the corresponding leg 6 and can move along the leg 6 itself.

See FIG. 18 , which is a U3-U3 cross-sectional view of the bracket assembly shown in FIG. 16 , in which the bracket assembly is in an open state. FIG. 19 is a cross-sectional view of the bracket assembly shown in FIG. 18 in a folded state. In some embodiments, at least one locking groove 62 is provided on at least one leg 6. The folding mechanism 7 further includes at least one second locking member 73, which is used to engage with the locking groove 62 of the leg 6 to lock the relative position of the adjustment seat 71 and at least one leg 6, thereby locking the base 5 at the adjusted height. In some embodiments, the folding mechanism 7 may include a plurality of second locking members 73, and the plurality of second locking members 73 correspond to the plurality of legs 6 one by one, and each leg 6 is provided with at least one locking groove 62. Each second locking member 73 is used to engage with the locking groove 62 on the corresponding leg 6 to lock the relative position of the adjustment seat 5 and each leg 6, and more reliably lock the relative position of the adjustment seat 71 and each leg 6.

Referring to FIG. 18 and FIG. 19 , in some embodiments, two or more locking grooves 62 may be provided on each leg 6, and these locking grooves 62 are provided at intervals along the length direction L of the leg 6. When the plurality of second locking members 73 are engaged with the locking grooves 62 at different positions, the base 5 is locked at different heights. In some embodiments, when each locking member 73 is engaged with the lowest locking groove 62, the bracket assembly 200 is in a folded state, and the engagement of the locking member 73 with the locking groove 62 can prevent the plurality of legs 6 from being accidentally opened. In some alternative embodiments, each leg 6 may also be provided with only one locking groove 62.

Continuing to refer to FIG. 18 , in some embodiments, each second locking member 73 corresponds to each connecting member 72 and is movably connected. More specifically, each second locking member 73 has a second elongated hole 731, and the second elongated hole 731 is sleeved on the third axis 33 of the corresponding connecting member 72, which is conducive to the compact structure of the folding mechanism 7. In some embodiments, each connecting member 72 has a groove 720 for the corresponding second locking member 73 to pass through, and the groove 720 defines the extension and contraction path of the second locking member 73.

Referring to Fig. 17 and Fig. 18, in some embodiments, the folding mechanism 7 may further include at least one second release member 74 and at least one second pull member 75, and the at least one second release member 74 is connected to the at least one second locking member 73 through the at least one second pull member 75 to drive the at least one second locking member 73 to disengage from the corresponding locking groove 62. In some embodiments, the second release member 74 may be configured as one, and the number of the second pull members 75 is the same as the number of the second locking members 73. The second release member 74 synchronously drives the plurality of second locking members 73 to disengage from the corresponding locking groove 62 through the plurality of second pull members 75, thereby simplifying the release operation. In some alternative embodiments, the number of the second release members 74 may be consistent with the number of the second locking members 73, and each second release member 74 independently drives the corresponding second locking member 73 through each second pulling member 75.

17 and 18 , in some embodiments, the folding mechanism 7 may further include at least one third elastic element 43, and the at least one third elastic element 43 is used to drive at least one second locking member 73 to engage with the corresponding locking groove 62. In some embodiments, the number of the third elastic elements 43 is consistent with the number of the second locking members 73, and the third elastic element 43 may directly or indirectly abut against the second locking member 73 to apply an elastic force to the second locking member 73 to insert the second locking member 73 into the corresponding locking groove 62.

Referring to FIGS. 17 to 21 , FIGS. 20 and 21 are top perspective views of some parts of the bracket assembly. In some embodiments, the adjustment seat 71 includes, for example, an upper shell 711 and a lower shell 712, which are connected together and define an inner cavity 70 therebetween. Each second pulling member 75 is located in the inner cavity 70, and each second locking member 73 is retractable relative to the inner cavity 70. The second release member 74 is a knob, which can be mounted on the lower shell 712. The second release member 74 has second arcuate grooves 740 corresponding to the number of the second lead members 75, and each second arcuate groove 740 spirally extends in the circumferential direction, so that the first end of each second arcuate groove 740 is close to the center M of the second release member 74, and the second end is close to the outer periphery of the second release member 74. Each second lead member 75 is slidably connected to at least one second arcuate groove 740 through a second pin 7521.

18, 19 and 20, when the second pin 7521 of each second traction member 75 is located at the second end of the corresponding second arc-shaped groove 740, each second locking member 73 is engaged with the corresponding locking groove 62 under the action of the third elastic element 43, and the position of the adjustment seat 71 relative to each leg 6 is locked, and the height of the base 5 is locked. When the position of the adjustment seat 71 needs to be adjusted, the torque T indicated by the arrow in FIG. 17 is applied to the operating portion 741 of the second release member 74, and the second release member 74 rotates, and drives each second pin 7521 to move toward the center of the second release member 74 through the groove wall of each second arc-shaped groove 740, and the third elastic element 43 is compressed. When each second pin 7521 is located at the first end of the corresponding second arc-shaped groove 740, each second locking member 73 is disengaged from the corresponding locking groove 62, and the adjustment seat 71 can be moved. After the adjustment seat 71 moves to a suitable position, the torque T is released, and each second locking member 73 is automatically engaged with the corresponding locking groove 62 under the action of the third elastic element 43, and the second release member 74 is driven to reset through the cooperation of the second pin 7521 and the second arc-shaped groove 740. In some alternative embodiments, a torsion spring for resetting the second release member 74 can also be installed in the adjustment seat 71.

Referring to FIGS. 18 to 21 , in some embodiments, each second traction member 75 may include a linking member 751 and a second driving member 752 (see FIG. 18 ). The first end of the linking member 751 is pivoted with the corresponding second locking member 73 via the fourth axis 34, and the second end of the linking member 751 is pivoted with the first end of the second driving member 752 via the fifth axis 35. The second end of the second driving member 752 is connected to the second release member 74, and more specifically, the second end of the second driving member 752 is slidably connected to the corresponding second arc groove 740 of the second release member 74 via the second pin 7521. In some embodiments, each third elastic element 43 may be installed between the second driving member 752 and the upper housing 711. Of course, in other embodiments, each second pulling member 75 may also have other implementation methods, and the second pulling member 75 may be a flexible cable, for example.

Referring to FIG. 17 , in some embodiments, the base 5 is made of plastic, for example, and a reinforcing sheet 51 may be installed at the bottom of the base 5. The reinforcing sheet 51 is, for example, a metal sheet (such as an iron sheet) and is used to strengthen the structural strength of the base 5. The reinforcing sheet 51 includes a plurality of hinge seats 511, and the upper ends of the plurality of legs 6 are hinged to the plurality of hinge seats 511.

See FIG. 16 and FIG. 22 , FIG. 22 is a three-dimensional diagram showing another use of the high chair 1000. In some embodiments, each leg 6 may include an upper leg (also referred to as a first leg) 601, a lower leg (also referred to as a second leg) 602, and a foot 603 that are detachably connected. More specifically, when the upper leg 601 and the lower leg 602 are connected together, the foot 602 is mounted on the bottom of the lower leg 602. When the lower leg 602 is removed from the upper leg 601, the foot 603 is removed from the bottom of the lower leg 602 and then mounted on the bottom of the upper leg 601. Thus, the bracket assembly 200 can provide more height options for the base 5.

Referring to Fig. 16 and Fig. 22, in some embodiments, the slide rail 61 is arranged on the upper leg 601, and the upper leg 601, the lower leg 602 and the foot 602 are detachably connected, for example, by screwing or clamping. In this way, after the lower leg 602 is removed, the folding mechanism 7 can still work normally.

Referring to Fig. 13, in some embodiments, a hook 610 may be provided at the lower end of each slide rail 61, and the hook 610 may be detachably connected to the storage bag 8. The storage bag 8 may provide additional storage space for the high chair.

It should be noted that the high chair 1000 provided in the embodiment of the present invention can be selectively equipped with one or both of the height adjustment mechanism 2 and the folding mechanism 7. In some high chairs 1000 having both the height adjustment mechanism 2 and the folding mechanism 7, the height adjustment operations of the height adjustment mechanism 2 and the folding mechanism 7 do not affect each other, providing more height adjustment possibilities for the high chair 1000.

It should be noted that the application scope of the height adjustment mechanism 2 provided in the embodiment of the present invention is not limited to the high chair 1000. By replacing the seat 1 of the height adjustment mechanism 2 with any suitable movable part, the height adjustment mechanism 2 can be applied to any suitable product. In addition, the application scope of the folding mechanism 7 provided in the embodiment of the present invention is not limited to the high chair 1000. It can also be applied to any suitable product, such as for storing a table.

It should be noted that, unless otherwise clearly specified and limited, the directional terms "horizontal" and "vertical" in the embodiments of the present invention are based on the orientation of the high chair in normal use, and the arrows H1, H2, and V in the figure schematically show the directions of "first horizontal direction", "second horizontal direction" and "vertical direction". These directional terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the scope of protection of the present invention.

Second Embodiment

FIG. 23 to FIG. 26 show a three-dimensional view of a vehicle provided by an embodiment of the present invention and a cross-sectional view of a support assembly 300 provided by an embodiment of the present invention. As shown in the figure, the vehicle is specifically described by taking a high chair 1000 (or a child seat, a child dining chair, or a chair) as an example, and it has a support assembly (also referred to as a leg folding structure) 300 provided by an embodiment of the present invention and a seat (also referred to as a child seat) 1 mounted on the support assembly 300. The support assembly 300 can adjust the state of the high chair 1000 by changing its own state. For example, when the support assembly 300 is in an unfolded state (see FIG. 23), the high chair 1000 is also in an unfolded state; when the support assembly 300 is in a folded state (see FIG. 25), the high chair 1000 is also in a folded state. In some alternative embodiments, the support assembly 300 may also have at least one intermediate state between the unfolded state and the folded state. It is understood that when the support assembly 300 is in different states, the seat 1 is supported at different heights to cope with different usage scenarios. It is understood that in some alternative embodiments, the type of the high chair 1000 is not limited to the child seat exemplified in this embodiment, and it may be, for example, a table, a high stool used in a bar, a tripod for supporting a camera, and the like.

24 and 26 , the bracket assembly 300 may include a base (also referred to as a support base) 5, a plurality of legs 6, a first sliding member 761, and a plurality of connecting members 762. The first sliding member 761 and the connecting member 762 may be used as part of a folding mechanism for opening or folding the plurality of legs 6.

Referring to Figures 23 and 25, the seat 1 is mounted on the base 5. In some embodiments, the seat 1 is connected to the base 5 so as to be relatively rotatable, for example, via a bottom turntable 100a, which allows the orientation of the seat 1 to be adjusted without rotating the entire high chair 1000. A locking device (not shown) may also be provided between the seat 1 and the base 5, which is used to lock the relative rotation of the seat 1 and the base 5 to keep the seat 1 in the adjusted orientation. In some alternative embodiments, the seat 1 is fixedly connected to the base 5, for example, and cannot be relatively rotatable.

The exploded view of the bracket assembly 300 shown in FIG27 shows an exemplary embodiment of the base 5. The base 5, for example, includes an upper shell 501, an intermediate shell 503, and a lower shell 502. The upper shell 501 and the lower shell 502 are connected, for example, by fasteners (not shown) and define a receiving chamber 5001. The intermediate shell 503 is, for example, located in the receiving chamber 5001. In some embodiments, the intermediate shell 503, for example, has a portion clamped between the upper shell 501 and the lower shell 502, and the fasteners for connecting the upper shell 501 and the lower shell 502 may also pass through the clamped portion of the intermediate shell 503. In some other embodiments, the middle shell 503 can be connected to one of the upper shell 501 and the lower shell 502 by, for example, snap-fitting or fastener connection.

The upper shell 501 faces the seat 1. In some embodiments, the upper shell 501, for example, has a center hole 5010, the middle shell 503, for example, has a center hole 5030, and the bottom turntable 100a of the seat 1, for example, is connected to the center hole 5010 and the center hole 5030. The middle part of the middle shell 503 (or the middle part of the base 5) has a hollow cylindrical column part 50311 extending in the vertical direction V. The column part 50311 is coaxial with the center hole 5030, and the outer peripheral wall of the column part 50311 forms a slide 5031, which is located inside the accommodating cavity 5001. In this embodiment, when the high chair 1000 is in normal use, the vertical direction V corresponds to, for example, a vertical direction perpendicular to the ground (or referred to as a height direction), and the column portion 50311 more specifically extends downward in the vertical direction V. A plurality of mounting seats 5032 may be provided on the periphery of the middle shell 503, and each mounting seat 5032 has a pivot hole 50320. The lower shell 502 has, for example, a plurality of holes 50201, and the plurality of holes 50201 correspond to the plurality of mounting seats 5032 one by one.

Referring to FIG. 24 and FIG. 26 , the plurality of legs 6 are pivotally connected to the base 5, respectively, and the slideway 5031 is located in the middle of the plurality of legs 6. The upper end of each leg 6 passes through the hole 50201 of the lower shell 502 and pivotally connected to the pivot hole 50320 of the mounting seat 5032 through the pivot 625. It can be understood that each leg 6 can rotate around the pivot 625, so the size of the hole 50201 should not interfere with the rotation of the leg 6. The lower ends of the plurality of legs 6 are suitable for being supported by the ground.

Referring to FIG. 24 , when the multiple legs 6 pivot away from each other to the maximum opening degree, the support assembly 300 is in the unfolded state. Referring to FIG. 26 , when the multiple legs 6 pivot toward each other to the minimum opening degree, the support assembly 300 is in the folded state. In some embodiments, the support assembly 300 can still stand on the ground when in the folded state. In some embodiments, the multiple legs 6 can also have one or more states between the maximum opening degree and the minimum opening degree, and the height of the base 5 changes with the change of the opening degree of the multiple legs 6, thereby providing a variety of support heights for the seat 1.

As can be seen from FIG. 23 and FIG. 25 , the support assembly 300 in this embodiment specifically includes four legs 6. It is understood that in some alternative embodiments, the number of legs 6 of the support assembly 300 is not limited to four, and the number of legs 6 can be, for example, three or more. In addition, in some alternative embodiments, the plurality of legs 6 can be connected to the base 5 in groups of two through the same hinge.

In addition, in some embodiments, the length of each leg 6 itself is retractable, which can provide more height options for the seat 1. Specifically, each leg 6, for example, includes at least two telescopic legs that are sleeved in sequence and a locking mechanism for releasing or locking the relative movement of these telescopic legs. When it is necessary to adjust the height of the seat 1, the telescopic legs are released and the length of the telescopic legs is adjusted to the desired length and then locked again. Or each leg 6, for example, includes two sleeve tubes that are sleeved in sequence, and the two sleeve tubes are detachably connected, and the seat 1 can be adjusted to two heights by removing or not removing the lower sleeve.

24 and 26 , the first sliding member 761 is, for example, annular and sleeved on the outside of the column portion 50311 in the accommodating chamber 5001. The first sliding member 761 can move along the column portion 50311 in the vertical direction V, that is, the first sliding member 761 is slidably matched with the slideway 5031. A plurality of linking members 762 are connected between the first sliding member 761 and the plurality of legs 6. More specifically, the lower shell 502 has a plurality of first through slots 5021 communicating with the accommodating chamber 5001, and the first end of each connecting member 762 passes through the first through slot 5021 and is pivotally connected to the first sliding member 761 through the pivot 551, and the second end of each connecting member 762 is pivotally connected to each supporting leg 6 outside the accommodating chamber 5001 through the pivot 552.

Referring to FIG. 27 , in some embodiments, the first sliding member 761 is provided with a plurality of slots 7610, and the plurality of slots 7610 are used to accommodate the first ends of the plurality of linking members 762. A recess 7613 may be provided near each slot 7610, and adjacent slots 7610 and recesses 7613 are connected through an axis hole (not shown in the figure). Each pivot 551 may be inserted into the axis hole from the recess 7613, and extend into the corresponding slot 7610 through the axis hole to pivot with the first end of the linking member 762.

Referring to FIG. 24 and FIG. 26 , in some embodiments, a reinforcing member 623 is attached to each leg 6 near the base 5. The reinforcing member 623 may be a sheet made of metal (e.g., iron or steel). The reinforcing member 623 is used to be pivoted with the second end of each link 762 through the pivot 552. In addition, a cover 622 may be installed on each leg 6, and the reinforcing member 623 is covered by the cover 622. Each cover 622 is provided with a second through-slot 6220 for each link 762 to pass through. After the second end of each link 762 passes through the second through-slot 6220, it is pivoted with the reinforcing member 623 on each leg 6 through the pivot 552. It is understood that the size of each second through-slot 6220 should not interfere with the rotation of the corresponding link 762. Each linking member 762 has, for example, a bent structure.

When it is necessary to unfold or fold the bracket assembly 300 of this embodiment, any leg 6 can be pushed, and any leg 6 will drive the first sliding member 761 to move relative to the column portion 50311 through the corresponding connecting member 762, and the first sliding member 761 will further drive the other legs 6 to unfold or fold synchronously through other connecting members 762.

In the support assembly 300 provided in this embodiment, each leg 6 is connected to the first slide member 761 through a connecting member 762, and the first slide member 761 can move relative to the slideway 5031 of the base 5, thereby driving each leg 6 to expand or fold, so that the support assembly 300 has a compact structure. In addition, the folding of the legs 6 will not cause the seat 1 to rise relative to the base 5, and the high chair using the support assembly 300 will not occupy too much longitudinal space after folding.

Referring to FIGS. 24 , 26 and 27 , in some embodiments, the folding mechanism of the bracket assembly 300 may further include a stabilizer 763 and at least one first motion conversion mechanism 766.

The stabilizer 763 is connected to the first sliding member 761 through at least one connecting member 405, so as to allow the stabilizer 763 to move along with the first sliding member 761 in the vertical direction V. In addition, the stabilizer 763 can rotate relative to the first sliding member 761 around a rotation axis X-X parallel to the vertical direction V. In this embodiment, the stabilizer 763 is, for example, in the shape of a ring, and the stabilizer 763 is sleeved on the outside of the column portion 50311 in the accommodating chamber 5001. The stabilizer 763 is coaxial with the column portion 50311.

27 and 28 illustrate an exemplary connection method of the stabilizing member 763 and the first sliding member 761. The stabilizing member 763 and the first sliding member 761 are both ring-shaped members. The central hole 7630 of the stabilizing member 763 can be placed on the column portion 50311, and the central hole 7611 of the first sliding member 761 can be placed on the column portion 50311. The stabilizing member 763 may be provided with at least one arc-shaped hole 7631. The number of the arc-shaped holes 7631 may be, for example, but not limited to four, and the plurality of arc-shaped holes 7631 may be evenly spaced around the rotation axis X-X. For example, the first sliding member 761 is provided with at least one through hole 7612, the number and position of the through hole 7612 correspond to the number and position of the arc holes 7631. At least one connecting member 405 is, for example, a bolt, and the number of connecting members 405 is the same as the number of through holes 7612. Each connecting member 405 is inserted into the corresponding arc hole 7631 and through hole 7612 along the vertical direction V to connect the stabilizer 763 and the first sliding member 761 together, and each connecting member 405 is slidably matched with the corresponding arc hole 7631. In this way, the stabilizer 763 can move in the vertical direction V along with the first sliding member 761, and can also rotate around the rotation axis X-X relative to the first sliding member 761.

Of course, the connection method of the stabilizer 763 and the first sliding member 761 is not limited to the above examples. For example, in some unshown embodiments, the positions of the arc hole 7631 and the through hole 7612 on the stabilizer 763 and the first sliding member 761 can be interchanged. In some other unshown embodiments, at least one connecting member 405, for example, includes at least two snap hooks, each snap hook, for example, extends from one of the stabilizer 763 and the first sliding member 761 in the vertical direction V, and is suitable for snapping with the other of the stabilizer 763 and the first sliding member 761, while allowing the stabilizer 763 to rotate relative to the first sliding member 761 around the rotation axis X-X. More specifically, in some embodiments, two or more engaging hooks extend downward from the outer periphery of the stabilizer 763, and the hook body of each engaging hook hooks the first sliding member 761, so that the stabilizer 763 can move along the column portion 50311 synchronously with the first sliding member 761. The two or more engaging hooks are evenly arranged around the rotation axis X-X, and the end surface of the first sliding member 761 can be provided with an annular slideway that slidably cooperates with the hook body of each engaging hook.

At least one first motion conversion mechanism 766 is provided between the stabilizer 763 and the base 5 , more specifically, between the stabilizer 763 and the column portion 50311 . The number of the first motion conversion mechanisms 766 may be, for example, but is not limited to four. The plurality of first motion conversion mechanisms 766 may be evenly spaced around the rotation axis X-X, for example. When the stabilizer 763 moves in the vertical direction V with the first slider 761 , each first motion conversion mechanism 766 drives the stabilizer 763 to rotate about the rotation axis X-X relative to the first slider 761 .

Referring to FIG. 27 , this embodiment also shows an exemplary implementation of the first motion conversion mechanism 766. Specifically, the first motion conversion mechanism 766 may include a first drive chute 7660 and a first drive pin 7661. The first drive chute 7660 is disposed on the base 5, more specifically, for example, on the column portion 50311. The first drive pin 7661 is disposed on the stabilizer 763 and slidably cooperates with the first drive chute 7660. For example, the stabilizer 763 is provided with a mounting hole 7632, and the first drive pin 7661 is mounted in the mounting hole 7632. When the stabilizer 763 moves up and down along the vertical direction with the first sliding member 761, the different inclined walls of the first driving inclined groove 7660 abut against the first driving pin 7661, thereby pushing the stabilizer 763 to rotate around the rotation axis X-X in both positive and negative directions. Of course, the implementation of the first motion conversion mechanism 766 is not limited to the above example, as long as it can push the stabilizer 763 to rotate around the rotation axis X-X when the stabilizer 763 moves along the first sliding member 761. For example, in some alternative embodiments, the first driving groove 7660 can be set on the stabilizer 763, and the first driving pin 7661 can be installed on the column portion 50311 of the base 5 and slidably cooperate with the first driving groove 7660.

For the support assembly 300 equipped with the stabilizer 763 and the first motion conversion mechanism 766, when the first slide 761 is pushed by any leg 6 and moves in the vertical direction V, the stabilizer 763 will move along with the first slide 761, and the stabilizer 763 rotates around the rotation axis X-X under the action of the first motion conversion mechanism 766, so that the stabilizer 763 is not easy to tilt and can move smoothly in the vertical direction V. The stable movement of the stabilizer 763 in the vertical direction V acts on the first slide 761 through the plurality of connecting members 405, and the first slide 761 as a whole can also move smoothly in the vertical direction V, thereby driving each leg 6 to be synchronously unfolded or folded.

See the side view and cross-sectional view of the leg folding structure shown in Figures 29 and 30. The bracket assembly 300 may also include at least one locking member 767 for locking the first sliding member 761 to limit the movement of the first sliding member 761 in the vertical direction V relative to the column portion 50311, thereby maintaining the bracket assembly 300 in an adjusted state. The number of locking pieces 767 may be but is not limited to two, and the plurality of locking pieces 767 may be evenly spaced around the rotation axis X-X, for example. Each locking member 767 can be installed on the lower shell 502 of the base 5, and each locking member 767 can move in a transverse direction H that is not parallel to the vertical direction V, so as to engage with or disengage from the first sliding member 761, thereby locking or releasing the first sliding member 761. In this embodiment, the transverse direction H can also be referred to as a horizontal direction, and the transverse direction H is, for example, perpendicular to the vertical direction V.

Referring to Figures 27 and 30, in some embodiments, the first slider 761 includes at least one locking portion 7614, and each locking portion 7614 includes one or more locking recesses 76140. In some embodiments, the number of locking parts 7614 may be but is not limited to two, and the plurality of locking parts 7614 may be evenly spaced around the rotation axis X-X, for example. The number of locking pieces 767 is, for example, consistent with the number of locking parts 7614 . Each lock 767 may include one or more locking tabs 7671. One or more locking recesses 76140 selectively cooperate with one or more locking protrusions 7671 to lock the first sliding member 761 at different positions (heights) of the column portion 50311 (i.e., the slideway 5031), thereby maintaining the bracket assembly 300 in an adjusted state.

Specifically in this embodiment, each locking portion 7614 includes a locking recess 76140. Each locking member 767 is located outside the receiving chamber 5001 and has two locking protrusions 7671, which are arranged at intervals in the vertical direction V. The lower shell 502 of the base 5 is provided with two holes 5027, and each locking protrusion 7671 can extend into the receiving chamber through the corresponding hole 5027. Referring to FIG. 30 , when the first sliding member 761 moves to a lower position along with the unfolded leg 6, the lower locking protrusion 7671 of the two locking protrusions 7671 cooperates with the locking recess 76140, the first sliding member 761 is locked, and the bracket assembly 300 is kept in the unfolded state. When each locking member 767 moves in the transverse direction H so that each locking protrusion 7671 moves out of the moving path of the first sliding member 761, the first sliding member 761 can move upward along with the folded leg 6. When the first sliding member 761 moves to the right position, each locking member 767 moves in the lateral direction so that the locking protrusion 7671 located above cooperates with the locking recess 76140, and the first sliding member 761 is locked again, and the bracket assembly 300 is kept in the folded state. It can be understood that in some alternative embodiments, each locking member 767 may include more locking protrusions 7671 arranged at intervals in the vertical direction V, and these locking protrusions 7671 selectively cooperate with the locking recess 76140 to lock the first sliding member 761 at different positions of the column part 50311, so as to stably maintain the bracket assembly 300 in any adjusted state.

In some alternative embodiments, each locking member 767 may have a locking protrusion 7671. Each locking portion 7614 may include two or more locking recesses 76140 arranged at intervals in the vertical direction V. According to the position change of the first sliding member 761 relative to the column portion 50311, the locking protrusion 7671 selectively cooperates with one of the multiple locking recesses 76140 to limit the sliding of the first sliding member 761 relative to the column portion 50311. Of course, in some alternative embodiments, each locking member 767 may have a plurality of locking protrusions 7671, and each locking portion 7614 may include a plurality of locking recesses 76140. As the position of the first sliding member 761 moves in the vertical direction V, the plurality of locking protrusions 7671 and the plurality of locking recesses 76140 may selectively cooperate to lock the position of the first sliding member 761.

27, 31 and 32, the bracket assembly 300 may further include at least one release member 768 and at least one elastic member 769. In some embodiments, the number of the release members 768 and the elastic member 769 is, for example, the same as the number of the locking members 767. The release member 768 is operably connected to the locking member 767 and is used to drive the locking member 767 to release the first sliding member 761. More specifically, each release member 768 has, for example, a receiving groove 7680, and the locking member 767 is, for example, installed in the receiving groove 7680. The elastic member 769 is used to drive the locking member 767 to lock the first sliding member 761. In some alternative embodiments, multiple locking members 767 may share one release member 768, and the number of elastic members 769 may be inconsistent with the number of locking members 767.

In some embodiments, the lower shell 502 of the base 5 is provided with at least one slide groove 5025, the number of which is the same as the number of the release members 768 and extends in the vertical direction V. Each release member 768 is installed in the corresponding slide groove 5025 and can move along the slide groove 5025 in the vertical direction V. A second motion conversion mechanism 7662 is provided between each release member 768 and the corresponding locking member 767, and the second motion conversion mechanism 7662 is used to convert the movement of each release member 768 in the vertical direction V into the movement of each locking member 767 in the transverse direction H, so as to allow each locking member 767 to lock or release the first sliding member 761.

31 and 32 illustrate an exemplary implementation of the second motion conversion mechanism 7662. Specifically, the second motion conversion mechanism 7662 includes a second drive slant groove 76620 and a second drive pin 76621. The second drive slant groove 76620 is disposed on the release member 768. The second drive pin 76621 is disposed on the locking member 767 and slidably cooperates with the second drive slant groove 76620. In some embodiments, a mounting hole for mounting the second drive pin 76621 may be provided on the locking member 767, and in some embodiments, the second drive pin 76621 may be attached to the locking member 767 or formed integrally therewith. When the release member 768 moves up and down along the slide groove 5025, different inclined walls of the second driving inclined groove 76620 abut against the second driving pin 76621, thereby pushing the locking member 767 to move along the transverse direction H to lock or release the first sliding member 761. Of course, the implementation of the second motion conversion mechanism 7662 is not limited to the above example, as long as it can drive the locking member 767 to lock or release the first sliding member 761 when the release member 768 moves in the vertical direction V. For example, in some alternative embodiments, the second drive groove 76620 can be set on the locking member 767, and the second drive pin 76621 can be installed on the release member 768 and slidingly cooperate with the second drive groove 76620.

30 to 32, the release member 768 is connected to the locking member 767 through the cooperation of the second driving inclined groove 76620 and the second driving pin 76621. By properly setting the release stroke of the release member 768, it is prevented that the locking protrusion 7671 completely withdraws from the corresponding hole of the lower housing 502 when the release member 768 drives the locking member 767 to release, so that the release member 768 can be prevented from falling off the slide groove 5025. Of course, there are many other ways to prevent the release member 768 from falling off the slide groove 5025, which will not be elaborated here.

In this embodiment, the release member 768 may be provided with an outwardly protruding operating portion 7681, so that the user can operate the release member 768. In addition, in this embodiment, when the release member 768 moves upward, the locking member 767 is driven to release the first sliding member 761; when the release member 768 moves downward, the locking member 767 is driven to lock the first sliding member 761. Referring to FIG. 30, the elastic member 769 is, for example, a spring, which may be arranged along the vertical direction V and clamped between the release member 768 and the lower housing 502 of the base 5. The elastic member 769 applies a downward force to the release member 768, thereby driving the locking member 767 to move to a position to lock the first sliding member 761. Of course, in some alternative embodiments, it can be designed that when the release member 768 moves downward, the locking member 767 is driven to release the first sliding member 761; when the release member 768 moves upward, the locking member 767 is driven to lock the first sliding member 761.

In some alternative embodiments, the bracket assembly 300 provided by the present invention may have the following modifications, for example.

1. The base 5 is not limited to being composed of the upper shell 501, the middle shell 503 and the lower shell 502. For example, in some embodiments, the base 5 may not have the upper shell 501, the middle shell 503 directly faces the seat 1, and the middle shell 503 and the lower shell 502 define the receiving chamber 5001. Alternatively, in some embodiments, the base 5 may not have the lower shell 502, and thus the base 5 does not have the receiving chamber 5001, in which case the first sliding member 761 and the stabilizing member 763 may be exposed. The locking member 767, the release member 768, the elastic member 769 and other components associated with the lower shell 502 may be installed on the middle shell 503. In some alternative embodiments, the base 5 may even have only the intermediate shell 503.

Second, the slideway 5031 is not limited to being formed by the outer peripheral wall of the cylindrical column part 50311 extending in the vertical direction V. For example, in some embodiments, the base 5 has a cylindrical hollow slide groove extending in the vertical direction V, and the cylindrical hollow slide groove, for example, forms the slideway 5031. The stabilizer 763 can be sleeved in the cylindrical hollow slide groove, and the first slide member 761, for example, has a sliding part sleeved in the cylindrical hollow slide groove. The first motion conversion mechanism 766 is arranged between the stabilizer 763 and the wall of the slideway 5031.

3. In some embodiments, at least one of the release member 768 and the elastic member 769 may not be provided. For example, a slide groove extending along the transverse direction H is provided on the base 5, and the locking member 767 is, for example, a latch that slides with the slide groove. The locking member 767 may have an operating portion for the user to operate, and the user manually moves the operating portion to make the locking member 767 lock or release the first sliding member 761. In some embodiments, the elastic member 769 is, for example, directly clamped between the locking member 767 and the base 5 to drive the locking member 767 to move to a position to lock the first sliding member 761.

Third Embodiment

An embodiment of the present invention provides a high chair, more specifically, the high chair is a child seat (or a child dining chair, chair) as an example. As shown in Figures 33 to 35, the child seat includes a seat assembly 100, a bracket assembly (also called a support assembly) 200 and a seat adjustment device 400. The seat assembly 100 is connected to the bracket assembly 200 through the seat adjustment device 400. The bracket assembly 200 includes a base (also called a support seat) 5 and a plurality of legs (also called support legs) 6 connected to the base 5. The base 5 is provided with a receiving hole 5211, and the seat adjustment device 400 is connected to the base 5 through the receiving hole 5211, and can rotate relative to the base 5. It should be understood that the seat adjustment device 400 provided by the present invention is not only applicable to child seats, but can also be applied to chairs such as growth chairs and office chairs.

In some embodiments, as shown in FIGS. 36 to 38 , the seat adjustment device 400 includes a first adjustment column 431, a second adjustment column 432, a height adjustment mechanism 433, a mounting seat 435, an adjustment seat 436, and a rotation adjustment mechanism 437. The first adjustment column 431 is located approximately in the middle of the bottom of the seat assembly 100, and the second adjustment column 432 is located approximately in the middle of the top of the base 5. The first adjustment column 431 is connected to the seat assembly 100 through the mounting seat 435. The mounting seat 435 includes an upper cover 4351, a lower cover 4352, and a connecting pipe 4353. The upper cover 4351 is connected to the seat assembly 100. The first adjustment column 431 is connected to the upper cover 4351. The lower cover 4352 and the upper cover 4351 are enclosed to form a first accommodating chamber 4354, and at least a portion of the height operating member 4337 (described later) is accommodated in the first accommodating chamber 4354. Specifically, the lower cover 4352 is detachably connected to the upper cover 4351, for example, by a connector such as a rivet. Referring to FIG. 37 , the connecting tube 4353 is connected to the upper cover 4351. Specifically, the connecting tube 4353 is formed integrally with the upper cover 4351. The connecting tube 4353 is arranged around the outer periphery of the first adjustment column 431 and encloses the first adjustment column 431 to form a second accommodating chamber 4355 for partially accommodating the height adjustment mechanism 433. The second accommodating chamber 4355 is connected to the first accommodating chamber 4354 so that the height locking member 4331 (described later) and the height operating member 4337 (described later) of the height adjustment mechanism 433 can be driven and connected. In other embodiments, the lower cover 4352 may not be provided, and the height operating member 4337 is operably connected to the upper cover 4351.

37 and 38 , the first adjustment column 431 has a hollow inner cavity 4311. Specifically, the first adjustment column 431 is a hollow tubular structure. The second adjustment column 432 is connected to the bracket assembly 200 and plugged with the first adjustment column 431. In some embodiments, the first adjustment column 431 and the second adjustment column 432 are plugged and matched so as not to rotate relative to each other. Specifically, one end of the second adjustment column 432 is plugged into the hollow inner cavity 4311 and can move along the hollow inner cavity 4311, and the other end of the second adjustment column 432 is connected to the base 5. In this embodiment, the second adjustment column 432 is a hollow tubular structure, and the second adjustment column 432 is rotatably connected to the base 5 through the adjustment seat 436. Specifically, the adjustment seat 436 is accommodated in the receiving hole 5211 and is rotatable relative to the base 5, and the second adjustment column 432 is fixedly connected to the adjustment seat 436. In other embodiments, the adjustment seat 436 may be accommodated in the receiving hole 5211 and is fixed relative to the base 5, and the second adjustment column 432 is rotatably connected to the adjustment seat 436. In other embodiments not shown, the adjustment seat 436 may not be provided, and the second adjustment column 432 may be fixedly connected or rotatably connected to the receiving hole 5211.

37 and 38, in this embodiment, both left and right sides of the first adjustment column 431 are provided with height adjustment mechanisms 433. For ease of description, the height adjustment mechanism 433 located on the left side in FIG. 37 is used as an example for explanation. The structure and working principle of the height adjustment mechanism 433 located on the right side in FIG. 37 are substantially the same as those on the left side.

Specifically, the height adjustment mechanism 433 includes a height locking member 4331, a height driving member 4332, a fixing seat 4333, a first reset member 4334 and a plurality of adjustment holes 4336 provided on the second adjustment column 432. The fixing seat 4333 is connected to the first adjustment column 431. In this embodiment, the fixing seat 4333 is plugged into and matched with an end of the first adjustment column 431 that is away from the mounting seat 435. The fixing seat 4333 includes a first portion 43331 and a second portion 43332. The first adjustment column 431 is plugged into the first portion 43331. The first portion 43331 is at least partially accommodated in the second accommodation chamber 4355 to be connected to the height locking member 4331. The second portion 43332 covers an end of the first adjustment column 431 away from the upper cover 4351 and abuts against the connecting tube 4353. The second portion 43332 forms a bottom wall of the second accommodating chamber 4355.

Referring to FIG. 42 and FIG. 44 , at least two ear plates 43337 are disposed on the periphery of the first portion 43331. In this embodiment, the number of the ear plates 43337 is four, and the four ear plates 43337 are symmetrically distributed on the periphery of the first portion 43331. For ease of description, two of the ear plates 43337 are used as an example for explanation. The two ear plates 43337 are disposed parallel to each other and enclosed with the second portion 43332 to form a first receiving groove 43336. At least a portion of the height driving member 4332 is received in the first receiving groove 43336 and can move along the first receiving groove 43336. A first boss 43338 is disposed in the first receiving groove 43336. The ear plate 43337 of the fixing seat 4333 is provided with a guide groove 43333 , and the extending direction of the guide groove 43333 is perpendicular to the axial direction of the first adjusting column 431 .

Referring to Figures 37, 38 and 40, a protrusion 4322 is provided on the outer side of the second adjustment column 432. Specifically, the second adjustment column 432 includes an adjustment tube 4323 and a tube plug 4321. One end of the adjustment tube 4323 is connected to the base 5, and the other end is provided with a tube plug 4321. The side surface of the tube plug 4321 forms a protrusion 4322. The protrusion 4322 abuts against the cavity wall of the hollow inner cavity 4311 of the first adjustment column 431 and can slide relative to the cavity wall of the hollow inner cavity 4311 of the first adjustment column 431. The provision of the protrusion 4322 can ensure the stability of the sliding of the first adjustment column 431. Optionally, the number of the protrusions 4322 can be one or at least two. In some other embodiments not shown, the outer wall of the adjustment tube 4323 may also form a protrusion 4322, and the present invention is not limited thereto. Referring to FIG. 41 , a fixing seat 4333 is provided at one end of the first adjustment column 431 away from the seat assembly 100, and the fixing seat 4333 is provided with a groove 43335, and the groove 43335 is suitable for cooperating with the protrusion 4322 and allowing the protrusion 4322 to pass through. Specifically, the second part 43332 of the fixing seat 4333 is provided with a socket 43334 corresponding to the hollow inner cavity 4311. Referring to FIG. 41 , the socket 43334 is connected to the hollow inner cavity 4311. The side wall of the socket 43334 is provided with a groove 43335. Optionally, the number of the grooves 43335 may be one or at least two. The number, position and shape of the grooves 43335 correspond to the number, position and shape of the protrusions 4322. The cooperation between the grooves 43335 and the protrusions 4322 can play a guiding role, and can also facilitate the insertion of the second adjustment column 432 into the hollow inner cavity 4311 of the first adjustment column 431. In some other embodiments not shown, the cavity wall of the hollow inner cavity 4311 of the first adjustment column 431 can also form the grooves 43335. In other embodiments not shown, the cavity wall of the hollow inner cavity 4311 can also form the protrusions 4322, and the outer side surface of the second adjustment column 432 can form the grooves 43335, etc., and the present invention is not limited to this.

In some embodiments, as shown in Figures 37 and 38, at least a portion of the height locking member 4331 is accommodated in the second accommodation chamber 4355. Please also refer to Figure 42, one end of the height locking member 4331 is connected to the fixing seat 4333, specifically, one end of the height locking member 4331 is connected to the first driving pin 4335, and the first driving pin 4335 is inserted into the guide groove 43333 of the fixing seat 4333 and can move along the guide groove 43333. Such arrangement enables the height locking member 4331 to move along the extension direction of the guide groove 43333, that is, the height locking member 4331 moves toward or away from the portion of the second adjusting column 432 where the adjusting hole 4336 is provided, thereby preventing the height locking member 4331 from being offset during the movement.

The other end of the height locking member 4331 is a first engaging end 43311. The first adjusting column 431 is provided with a first through hole 4312 for the first engaging end 43311 of the height locking member 4331 to pass through. The fixing seat 4333 is correspondingly provided with a second through hole 43339. Please also refer to FIG. 12 , the second through hole 43339 penetrates the first portion 43331 and the first protruding column 43338 of the fixing seat 4333, and is connected to the first through hole 4312. The height locking member 4331 is movably penetrated through the first through hole 4312 and the second through hole 43339, and switches between a first locking position (also referred to as a height locking position) and a first release position (also referred to as a height release position). When the height locking member 4331 is located at the first locking position, the first engaging end 43311 of the height locking member 4331 passes through the second through hole 43339 and the first through hole 4312 to engage with at least one of the plurality of adjustment holes 4336. In this embodiment, the height locking member 4331 is pin-shaped, and the number of the first engaging end 43311 is one, and the first engaging end 43311 can pass through the second through hole 43339 and the first through hole 4312 to engage with one of the plurality of adjustment holes 4336. When the height locking member 4331 is engaged with any of the adjustment holes 4336, it corresponds to the locking state of the height adjustment mechanism 433. When the height locking piece 4331 is in the first unlocking position, the height locking piece 4331 is disengaged from the adjusting hole 4336, that is, the first engaging end 43311 of the height locking piece 4331 is disengaged from the adjusting hole 4336, so that the first adjusting column 431 can move relative to the second adjusting column 432, which corresponds to the unlocking state of the height adjustment mechanism 433.

The seat adjustment device 400 in this embodiment makes the height locking member 4331 move between the first locking position and the first unlocking position so that the first adjustment column 431 is fixed or movable relative to the second adjustment column 432, thereby achieving the adjustment of the height of the seat assembly 100 relative to the bracket assembly 200 (i.e., the base 5).

As shown in FIGS. 37 and 38 , the height driving member 4332 is accommodated in the second accommodating chamber 4355. At least a portion of the height driving member 4332 is accommodated in the first accommodating groove 43336 and is movable relative to the first accommodating groove 43336. Please also refer to FIGS. 43 and 44 , the height driving member 4332 is provided with a first driving groove 43321, and the extension direction of the first driving groove 43321 is inclined relative to the moving directions D1 and D2 of the height locking member 4331. The moving directions D1 and D2 of the height locking member 4331 are substantially perpendicular to the length extension direction of the second adjustment column 432, and the moving directions D3 and D4 of the height driving member 4332 are substantially parallel to the length extension direction of the second adjustment column 432. In this embodiment, the length extension direction of the second adjustment column 432 is also the axial direction of the second adjustment column 432, and the axial direction of the second adjustment column 432 is parallel to the axial direction of the first adjustment column 431. The first driving pin 4335 is connected to the height locking member 4331. The first driving pin 4335 is plug-fitted with the first driving groove 43321 and is movable along the first driving groove 43321. In some embodiments, the moving direction of the height driving member 4332 is substantially perpendicular to the height locking member 4331. Specifically, the first driving pin 4335 passes through the first driving groove 43321 and the guide groove 43333 and realizes the driving connection between the height locking member 4331 and the height driving member 4332. In other embodiments not shown, the height locking member 4331 may be provided with the first driving groove 43321, and the first driving pin 4335 may be fixedly provided or detachably provided on the height driving member 4332.

As shown in FIGS. 37 and 38 , the first reset member 4334 is disposed between the height driving member 4332 and the fixing seat 4333. The first reset member 4334 is adapted to bias the height driving member 4332 so that the height locking member 4331 moves to the first locking position. The first reset member 4334 may be an elastic member such as a spring or a spring sheet. In this embodiment, please also refer to FIG. 44 , the height driving member 4332 forms a first reset member receiving groove 43322 facing the first portion 43331, and at least a portion of the first protrusion 43338 extends into the first reset member receiving groove 43322. The first reset member 4334 is received in the first reset member receiving groove 43322. One end of the first reset member 4334 abuts against the wall of the first reset member receiving groove 43322, and the other end abuts against the first protrusion 43338. The first reset member 4334 is simultaneously received in the first receiving groove 43336. In other embodiments, the two ends of the first reset member 4334 may abut against the bottom wall of the height driving member 4332 and the second receiving chamber 4355, respectively. Referring to Figure 38, when the height locking member 4331 is operated to the first release position, the first reset member 4334 is in a compressed state, and the height driving member 4332 can be driven to move along the D4 direction under the action of the elastic restoring force of the first reset member 4334. The height driving member 4332 drives the first driving pin 4335 to move along the D1 direction through the first driving groove 43321, thereby driving the height locking member 4331 from the first release position to the D1 direction to the first locking position, so that the first engaging end 43311 passes through the first outlet hole 4312 and engages with one of the adjustment holes 4336. The provision of the first reset member 4334 enables the height locking member 4331 to automatically reset from the first unlocking position to the first locking position.

In some embodiments, as shown in FIGS. 36 to 37 , the height adjustment mechanism 433 includes a height operating member 4337, a pulling member 4338, and a second reset member 4339. The height operating member 4337 is drivingly connected to the height driving member 4332 via the pulling member 4338. Specifically, one end of the pulling member 4338 is received in the first receiving chamber 4354 and connected to the height operating member 4337, and the other end of the pulling member 4338 extends into the second receiving chamber 4355 and connected to the height driving member 4332.

As shown in FIG. 37 , the height operating member 4337 is operably disposed on the mounting seat 435. When the height operating member 4337 is operated, the height operating member 4337 can be switched between the first position and the second position. For example, when the height operating member 4337 moves from the first position to the second position, the height operating member 4337 drives the height locking member 4331 to switch from the first locking position to the first unlocking position through the traction member 4338. The height operating member 4337 includes a first operating portion 43371 and a first connecting portion 43372. The first operating portion 43371 is connected to the approximate middle portion of the first connecting portion 43372. The first connecting portion 43372 is movably accommodated in the first accommodating chamber 4354. The lower cover 4352 is provided with a first through hole 4356, and the first operating portion 43371 extends out of the first accommodating chamber 4354 through the first through hole 4356. The first operating portion 43371 can abut against the side wall of the first through hole 4356 to limit the movement stroke of the height operating member 4337. One end of the first connecting portion 43372 is connected to the pulling member 4338, and the other end is provided with a second reset member accommodating groove 43373 for accommodating the second reset member 4339, and the notch of the second reset member accommodating groove 43373 faces the radial outer side of the mounting seat 435.

37, the second reset member 4339 is adapted to bias the height operating member 4337 so that the height operating member 4337 moves to the first position. The second reset member 4339 is accommodated in the first accommodation chamber 4354, and the two ends of the second reset member 4339 respectively abut against the height operating member 4337 and the cavity wall of the first accommodation chamber 4354. Specifically, one end of the second reset member 4339 abuts against the radial outer side wall of the mounting seat 435 of the first accommodation chamber 4354, and the other end is accommodated in the second reset member accommodation groove 43373 and abuts against the bottom wall of the second reset member accommodation groove 43373, so as to prevent the second reset member 4339 from being offset during the deformation process.

37 and 38, when the height of the seat assembly 100 needs to be adjusted, an external force is applied to the height operating member 4337 to move the height operating member 4337 from the first position to the second position, and the height operating member 4337 drives the height driving member 4332 to move in the D3 direction (upward) through the traction member 4338, and the guide groove 43333, the first driving groove 43321 and the first driving pin 4335 are plugged into each other (see FIG. 42 and 43), driving the height locking member 4331 to move in the direction D2 (towards the outside of the second adjusting column 432), so that the height locking member 4331 moves from the first locking position to the first unlocking position, that is, the first engaging end 43311 of the height locking member 4331 is disengaged from the corresponding adjustment hole 4336. At this time, the first adjusting column 431 can be moved relative to the second adjusting column 432 to adjust the height of the seat assembly 100.

When the seat assembly 100 is adjusted to a desired height, that is, when the first adjustment post 431 moves to a desired height position relative to the second adjustment post 432, the first through hole 4312 is aligned with another corresponding adjustment hole 4336. The external force applied to the height operating member 4337 is released, and the height operating member 4337 moves from the second position to the first position under the elastic restoring force of the second reset member 4339, and the traction member 4338 relaxes, and the external force transmitted to the height driving member 4332 through the traction member 4338 is eliminated. Referring to FIG. 37 , the height driving member 4332 moves in the direction D4 (downward) under the elastic restoring force of the first reset member 4334, and the height locking member 4331 is driven to move in the direction D1 (toward the inner side of the second adjustment column 432) through the plug-in cooperation between the first driving pin 4335 and the guide groove 43333 and the first driving groove 43321, so that the first engaging end 43311 of the height locking member 4331 is engaged with the adjustment hole 4336 aligned with the first through hole 4312, so that the first adjustment column 431 is locked relative to the second adjustment column 432. In this way, the seat assembly 100 is locked at a desired height.

The seat adjustment device 400 of the embodiment of the present invention adjusts the height of the seat assembly 100 relative to the bracket assembly 200 by inserting and matching the first adjustment column 431 and the second adjustment column 432 and limiting or releasing the relative movement between the first adjustment column 431 and the second adjustment column 432 using the height adjustment mechanism 433. The seat adjustment device 400 of the embodiment of the present invention has a simple structure and is easy to operate.

In some embodiments, as shown in FIG. 37 and FIG. 38 , the seat adjustment device 400 further includes an anti-escape mechanism 438. Referring to FIG. 40 and FIG. 41 , the anti-escape mechanism 438 includes an elastic finger 4381 and a snap-fit groove 4382 disposed on the adjustment seat 436. Specifically, the adjustment seat 436 has a first receiving groove 4361, and the snap-fit groove 4382 is disposed on the side wall of the first receiving groove 4361. The extension direction of the snap-fit groove 4382 is substantially parallel to the extension direction of the second adjustment column 432. The lower end of the second adjustment column 432 is fixed to the bottom wall of the first receiving groove 4361. In other embodiments, the engaging groove 4382 may be provided on the base 5 of the bracket assembly 200. For example, when the adjustment seat 436 is not provided, the engaging groove 4382 may be provided on the side wall of the receiving hole 5211 of the base 5. Referring to FIG. 38 and FIG. 41 , the elastic finger 4381 has a hook portion 43811, and the elastic finger 4381 is provided on the connecting tube 4353. The hook portion 43811 can move along the engaging groove 4382 and can be engaged with the end of the engaging groove 4382. When the first adjustment column 431 moves along the D3 direction relative to the second adjustment column 432, the anti-disengagement mechanism 438 can prevent the first adjustment column 431 from disengaging from the end of the second adjustment column 432.

The connecting tube 4353 of the mounting seat 435 is inserted into the first receiving groove 4361 of the adjusting seat 436. The connecting tube 4353 and the first receiving groove 4361 in this embodiment are both non-circular in shape and include mutually abutting section walls (not numbered in the figure), which prevents the mounting seat 435 and the adjusting seat 436 from rotating relative to each other.

In some embodiments, as shown in FIGS. 45 to 47 , the rotation adjustment mechanism 437 includes a rotation locking member 4371, a rotation operating member 4372, a rotation resetting member 4373, and a plurality of slots 4374 disposed on the base 5 of the bracket assembly 200. The rotation locking member 4371 is movably connected to the adjustment seat 436 so that the rotation locking member 4371 can be switched between a second locking position (also referred to as a rotation locking position) and a second release position (also referred to as a rotation release position). One end of the rotation locking member 4371 is a second engaging end 43711. A second receiving groove 4362 is provided on a side of the adjustment seat 436 away from the second adjustment column 432, and an end of the rotating locking member 4371 away from the second engaging end 43711 is received in the second receiving groove 4362. Please also refer to FIG. 48 , the adjustment seat 436 is provided with a second through hole 4363 for the rotating locking member 4371 to pass through, and the second through hole 4363 passes through the side walls of the first receiving groove 4361 and the second receiving groove 4362. The rotating locking member 4371 is movably passed through the second through hole 4363. When the rotating locking member 4371 is in the second locking position, that is, the rotating adjustment mechanism 437 is in the locking state, the second engaging end 43711 of the rotating locking member 4371 passes through the second through hole 4363 and engages with one of the plurality of slots 4374, so that the adjusting seat 436 is fixed relative to the base 5. When the rotating locking member 4371 is in the second unlocking position, that is, the rotating adjustment mechanism 437 is in the unlocking state, the second engaging end 43711 of the driving locking member 4371 exits the corresponding slot 4374, so that the adjusting seat 436 can rotate relative to the base 5. In this embodiment, there are two rotating locking members 4371, which are symmetrically arranged relative to the pivot axis R-R of the adjustment seat 436, so that the seat assembly 100 can be locked in a desired orientation more stably. In other embodiments not shown, the number of the rotating locking members 4371 is one or more than two, and the present invention is not limited thereto.

46 and 47, the number of the slots 4374 is at least twice the number of the rotation locks 4371. In this embodiment, the number of the slots 4374 is four. The four slots 4374 are evenly distributed in the circumferential direction relative to the pivot axis R-R of the adjustment seat 436. The angle between two adjacent slots 4374 is about 90 degrees, so that the adjustment seat 436 can be rotated relative to the base 5 and locked at 90 degrees, 180 degrees, 270 degrees and 360 degrees, respectively, that is, the seat assembly 100 can be rotated relative to the base 5 and locked at 90 degrees, 180 degrees, 270 degrees and 360 degrees, respectively. By adjusting the number of slots 4374 and the angle between two adjacent slots 4374, the seat assembly 100 can be rotated relative to the base 5 and locked in different orientations. In other embodiments not shown, the number of slots 4374 can be six, and the angle between two adjacent slots 4374 is about 60 degrees. The number of slots 4374 of the present invention is not limited. Each rotating locking member 4371 is provided with a first driving surface 43712.

In some embodiments, as shown in FIG. 46 and FIG. 47 , the rotating operating member 4372 is operably disposed on the base 5. The rotating operating member 4372 is movably connected to the adjustment seat 436, and the adjustment seat 436 is accommodated in the accommodation hole 5211 and is rotatable relative to the base 5. Specifically, the adjustment seat 436 is provided with a connecting hole 4364, and the connecting hole 4364 passes through the bottom wall of the second accommodation groove 4362. Please also refer to FIG. 49 , the rotating operating member 4372 is provided with a connecting column 43723. The connecting column 43723 is plugged and matched with the connecting hole 4364. Specifically, the number of the connecting columns is two, and the number of the connecting holes 4364 corresponds to the number of the connecting columns 43723. In other embodiments, the rotating operating member 4372 may be movably connected to the second adjusting column 432 .

Referring to FIG. 46 , the rotating operating member 4372 is provided with a second driving surface 43721. Specifically, please also refer to FIG. 49 , the rotating operating member 4372 includes a plug-in portion 43722, and the side surface of the plug-in portion 43722 forms the second driving surface 43721. The number of the plug-in portions 43722 corresponds to the number of the rotating locking members 4371. In this embodiment, the number of the plug-in portions 43722 is two. The two plug-in portions 43722 are spaced apart from the two connecting posts 43723. In this embodiment, the two plug-in parts 43722 are arranged opposite to each other, the two connecting posts 43723 are also arranged opposite to each other, and the angle between the connecting line of the two plug-in parts 43722 and the connecting line of the two connecting posts 43723 is about 90 degrees. Correspondingly, please refer to FIG. 47 , each rotating locking member 4371 is provided with a plug-in slot 43713, and the side wall of the plug-in slot 43713 forms a first driving surface 43712. The two plug-in parts 43722 are respectively plugged and matched with the plug-in slots 43713 corresponding to the two rotating locking members 4371, and the second driving surface 43721 abuts against the first driving surface 43712. In some embodiments, at least one of the first driving surface 43712 and the second driving surface 43721 is inclined relative to the extension direction of the rotation locking member 4371. In this embodiment, the movement directions D5 and D6 of the rotation locking member 4371 are substantially perpendicular to the extension direction of the second adjustment column 432, and substantially perpendicular to the movement directions D1 and D2 of the height locking member 4331. The movement directions D7 and D8 of the rotation operating member 4372 are substantially parallel to the extension direction of the second adjustment column 432.

As shown in Figures 46 and 47, the rotation reset member 4373 is accommodated in the second accommodating groove 4362. The rotation reset member 4373 is suitable for biasing the two rotation locking members 4371 to move to the second locking position. The rotation reset member 4373 includes elastic members such as springs and elastic sheets. In this embodiment, the number of the rotation reset member 4373 is one. The rotation reset member 4373 is connected between the two rotation locking members 4371, and the two ends of the adjustment seat 436 are respectively abutted against the two rotation locking members 4371. Specifically, a third reset member accommodating groove 43714 is provided at one end of each rotation locking member 4371 away from the second engaging end 43711. The two ends of the rotation reset member 4373 are received in the third reset member receiving grooves 43714 of the two rotation locking members 4371. In other embodiments, the number of the rotation reset members 4373 can be multiple. For example, two rotation reset members 4373 are provided corresponding to the rotation locking members 4371. One end of each rotation reset member 4373 abuts against the corresponding rotation locking member 4371, and the other end abuts against the side wall of the second receiving groove 4362.

When the seat assembly 100 needs to be adjusted, an external force is applied to the rotating operating member 4372 to move the rotating operating member 4372 along the D7 direction. Through the driving cooperation of the first driving surface 43712 and the second driving surface 43721, the two rotating locking members 4371 move toward each other, so that the second engaging ends 43711 of the two rotating locking members 4371 are respectively disengaged from the slots 4374, thereby allowing the adjustment seat 436 to rotate relative to the base 5, and thus allowing the seat assembly 100 to rotate relative to the base 5.

When the seat assembly 100 is rotated a certain angle (for example, 90 degrees) to the desired orientation, the external force applied to the rotating operating member 4372 is released, and the two rotating locking members 4371 move in opposite directions under the elastic restoring force of the rotating reset member 4373 until they move to the second locking position, so that the second engaging end 43711 of each rotating locking member 4371 engages with the corresponding slot 4374, thereby limiting the relative rotation between the adjustment seat 436 and the base 5, and thus achieving the locking of the seat assembly 100 in the desired orientation.

The seat adjustment device 400 of the embodiment of the present invention can realize the rotation and locking of the seat assembly 100 relative to the support assembly 200 at a desired position by providing a rotation adjustment mechanism 437, so as to conveniently realize the position adjustment of the seat assembly 100. Thus, the child seat can realize both height adjustment and position adjustment, so as to better meet the use requirements of different children in different application scenarios.

In some embodiments, as shown in FIGS. 50 to 53 , the seat assembly 100 may be detachably connected to the mounting seat 435 via a seat disassembly mechanism 500. As shown in FIG. 40 , the seat assembly 100 may include a seat 1 and a dining tray 12, wherein the seat 1 includes a seat portion 111, a backrest portion 112, and two side portions 113 respectively connected to the two sides of the seat portion 111. As shown in FIGS. 52 to 54 , the seat disassembly mechanism 500 includes a disassembly locking member 541, a disassembly releasing member 542, a disassembly restoring member 543, a snap-fitting hole 544 disposed on the mounting seat 435, and a snap-fitting recess 545 disposed on the mounting seat 435. 52 , the mounting seat 435 is provided with a connecting groove 4358, the engaging hole 544 is provided on the side wall of the connecting groove 4358 and is connected with the connecting groove 4358, the disassembly locking member 541 is inserted into the connecting groove 4358 and can move in a direction parallel to the bottom wall of the connecting groove 4358 to realize movement between the third position and the fourth position.

As shown in Figures 51 and 52, the disassembly locking member 541 is arranged on the bottom surface of the seat portion 111 of the seat 1. The disassembly locking member 541 includes a hook portion 5411 and a base 5412 connected to each other. One end of the base 5412 is connected to the bottom surface of the seat portion 111, and the other end is connected to the hook portion 5411. In this embodiment, the disassembly locking member 541 is an integrally formed structure. When the disassembly locking member 541 is located in the third position, the hook portion 5411 is engaged with the engaging hole 544 so that the seat 1 is fixed relative to the mounting seat 435. When the disassembly locking member 541 is located in the fourth position, the hook portion 5411 is disengaged from the engaging hole 544 so that the seat 1 can be separated from the mounting seat 435. There are at least two disassembly locking members 541, and the number of the engaging holes 544 corresponds to the number of the disassembly locking members 541. At least two disassembly locking members 541 are evenly distributed on a side of the seat portion 111 facing the mounting seat 435, so that the seat assembly 100 can be more stably fixed on the mounting seat 435. The hook portions 5411 of the multiple disassembly locking members 541 extend in the same direction or are parallel to each other. The shapes and sizes of the multiple hook portions 5411 can be the same or different, as long as each hook portion 5411 can be engaged or disengaged with the corresponding engaging hole 544 when the seat assembly 100 moves. In this embodiment, the number of the disassembly locking members 541 is four, and the number of the engaging holes 544 is also four accordingly. Specifically, the mounting seat 435 has a substantially rectangular top surface, and the four engaging holes 544 are respectively located near the four top corners of the top surface of the mounting seat 435. In the present embodiment, the hook portion 5411 is configured to extend backward from the base 5412 of the disassembly locking member 541, while in other embodiments, the hook portion 5411 may also be configured to extend forward from the base 5412 of the disassembly locking member 541, and the present invention is not limited to this.

In some embodiments, as shown in FIG. 53 and FIG. 54 , a disassembly release 542 is operably disposed on the seat assembly 100, and the disassembly release 542 has a snap-fitting protrusion 5421, and the disassembly release 542 is switchable between a sixth release position (also referred to as a disassembly release position) and a sixth locking position (also referred to as a disassembly locking position). When the disassembly release 542 is located at the sixth locking position, the snap-fitting protrusion 5421 can snap-fit with the snap-fitting recess 545 to restrict the disassembly locking member 541 to the third position. When the disassembly release 542 is located at the release position, the snap-fitting protrusion 5421 is released from the snap-fitting recess 545, so that the disassembly locking member 541 is at the fourth position. In this embodiment, the disassembly release member 542 is disposed at the front side of the seat portion 111 of the seat 1, and in other embodiments, the disassembly release member 542 may also be disposed at the rear side, the left side or the right side of the seat portion 111 of the seat 1, and the present invention is not limited thereto. The seat assembly 100 is provided with a receiving hole 1014, and specifically, the receiving hole 1014 passes through the seat portion 111 of the seat 1. The engaging protrusion 5421 of the disassembly release member 542 can pass through the receiving hole 1014 and engage with the engaging recess 545, and an operating recess 5422 is provided at one end of the disassembly release member 542 away from the engaging protrusion 5421 to facilitate operation of the disassembly release member 542, and the operating recess 5422 at least partially extends out of the receiving hole 1014.

In this embodiment, as shown in FIGS. 45 and 53 , the seat assembly 100 further includes a stopper 1113. The stopper 1113 is generally T-shaped, and includes a stopper portion 1031 and a support portion 1032 connected to each other. One end of the stopper portion 1031 is fixed to the middle of the front edge of the seat portion 111, and the other end is connected to the middle of the support portion 1032. The support portion 1032 is supported by the bottom of the dining tray 12. In this way, when an infant sits on the seat 1, the infant's legs extend from both sides of the stopper portion 1031, and the stopper portion 1031 stops the infant's crotch to prevent the infant from sliding off the seat 1. The front side of the stopper 1031 is provided with a mounting groove 10311 connected to the receiving hole 1014, and at least the portion of the disassembly release member 542 provided with the operating recess 5422 is located in the mounting groove 10311 for easy operation. In other embodiments, the operating recess 5422 may not be provided, or a pull ring or the like may be provided at the end of the disassembly release member 542 away from the engaging protrusion to facilitate operation of the disassembly release member 542.

As shown in FIG. 53 and FIG. 54 , the disassembly reset member 543 is disposed between the seat assembly 100 and the disassembly release member 542. The disassembly reset member 543 is adapted to bias the disassembly release member 542 so that the disassembly release member 542 moves toward the sixth locking position. The seat assembly 100 is provided with a second receiving groove 1015, and the disassembly release member 542 also has an abutment portion 5423, at least a portion of which is received in the second receiving groove 1015 to prevent the disassembly reset member 543 from being offset. The disassembly reset member 543 is received in the second receiving groove 1015 and abuts against the abutment portion 5423. In this embodiment, the abutment portion 5423 is provided with a second convex column 5424 extending away from the engaging convex portion 5421. The disassembly restoring member 543 is a compression spring, one end of which is sleeved on the second protruding column 5424, and the other end of which is in contact with the groove wall of the second receiving groove 1015, thereby further reducing the displacement of the disassembly restoring member 543 under the action of external force.

52 and 54 , in this embodiment, when the seat assembly 100 needs to be disassembled, the disassembly release member 542 is pulled to move the disassembly release member 542 from the sixth locking position to the sixth unlocking position, so that the disassembly lock member 541 can move relative to the mounting seat 435. At this time, the disassembly release member 542 is kept in the disassembly release position, and an external force along the D9 direction is applied to the seat assembly 100, so that the four disassembly lock members 541 simultaneously move from the third position to the fourth position along the D9 direction, and each hook portion 5411 exits the engaging hole 544 along the connecting groove 4358 to release the engagement between each hook portion 5411 and the corresponding engaging hole 544, so that the seat assembly 100 can be separated relative to the mounting seat 435. When the seat assembly 100 is separated from the mounting seat 435 and the external force is removed, the disassembly release member 542 automatically returns to the sixth locking position from the sixth unlocking position under the elastic restoring force of the disassembly reset member 543.

When the seat assembly 100 needs to be installed, each disassembly locking member 541 is inserted into the corresponding connection groove 4358 and each hook portion 5411 is aligned with the corresponding engagement hole 544, and the disassembly release member 542 is moved from the sixth locking position to the sixth unlocking position under the action of an external force, such as the squeezing force of the engagement projection on the base 5. The disassembly locking member 541 is kept at the sixth unlocking position, and the seat assembly 100 is pushed along the D10 direction, so that the disassembly locking member 541 moves along the D10 direction to the sixth locking position. At this time, the engaging protrusion 5421 of the disassembly release member 542 is aligned with the engaging recess 545, and the engaging protrusion 5421 is no longer squeezed by the base 5. The disassembly release member 542 moves to the sixth locking position under the elastic restoring force of the disassembly reset member 543, thereby fixing the seat assembly 100 to the mounting seat 435.

In some embodiments, as shown in FIGS. 55 and 56 , the meal tray 12 is connected to the seat 1 via a meal tray adjustment mechanism 12A. Specifically, the meal tray 12 is detachably connected to two side portions 113 of the seat 1 and can be moved relative to the two side portions 113. The upper edges of the two side portions 113 of the seat 1 protrude outward to form an armrest portion 115. In other embodiments not shown, the meal tray 12 may be connected to only one of the side portions 113 of the seat 1. Alternatively, the meal tray 12 is connected to the seat 1 via other components, such as a connecting seat fixed to the side portion 113 of the seat 1. For ease of description, the connection between the side portion 113 located on one side of the seat 1 and the meal tray 12 is taken as an example for explanation below.

As shown in Figures 56 to 58, the meal tray adjustment mechanism 12A includes a meal tray release member 1251, an adjustment reset member 1252, and a plurality of gear slots 1253 provided on the side portion 113 of the seat 1. The plurality of gear slots 1253 are located below the armrest portion 115. The side of the meal tray 12 that can carry loads (e.g., place tableware, etc.) is the front side 121 (see Figure 55), and the side away from the front side 121 is the back side 122. The meal tray 12 is provided with a connecting plate 123 to guide the meal tray 12 to move along the extension direction of the connecting plate 123. The connecting plate 123 is provided with a hole 124 for the meal tray release member 1251 to pass through. The meal tray 12 is also provided with a limiting portion 125, and the limiting portion 125 is provided at one end of the connecting plate 123. The limiting portion 125 can abut against the side portion 113 of the seat 1 to limit the movement of the meal tray 12. In this embodiment, the connecting plate 123 and the limiting portion 125 are both arranged on the back side 122 of the meal tray 12. The connecting plate 123 and the limiting portion 125 are both provided with reinforcing ribs 126 to increase the anti-deformation strength of the two.

Referring to FIG. 57 , the plate release 1251 has a snap-fit portion 12511 and a second operating portion 12512, and the second operating portion 12512 protrudes from the snap-fit portion 12511 and extends in a direction away from the back surface 122. The plate release 1251 is movably disposed on the plate 12. Specifically, the plate release 1251 is movably inserted into the hole 124. The second operating portion 12512 can abut against one side of the connecting plate 123 to limit the movement stroke of the plate release 1251. Referring to FIG. 56 to FIG. 57 , the plate release 1251 is provided with a strip groove 1513, and the plate 12 is provided with a connecting pin 127, and the connecting pin 127 is plugged into and matched with the strip groove 1513. The connecting pin 127 is movable along the strip groove 1513 and can abut against the end of the strip groove 1513 to limit the movement of the plate release member 1251. In other embodiments, the plate 12 may be provided with a strip groove 1513, and the plate release member 1251 may be provided with a connecting pin 127, and the connecting pin 127 is plugged into and matched with the strip groove 1513.

As shown in Figures 56 and 57, the adjustment reset member 1252 is disposed between the tray release member 1251 and the tray 12, and the adjustment reset member 1252 is suitable for biasing the tray release member 1251 to move the tray release member 1251 to the seventh locking position (also referred to as the tray locking position). Specifically, the adjustment reset member 1252 is accommodated in the strip groove 1513. One end of the adjustment reset member 1252 abuts against the end of the strip groove 1513, and the other end of the adjustment reset member 1252 abuts against the connecting pin 127. The tray release member 1251 has a seventh locking position and a seventh unlocking position (also referred to as the tray unlocking position). When the tray release member 1251 is located at the seventh locking position, the engaging portion 12511 engages with at least one of the plurality of shift slots 1253 to fix the tray 12 on the seat 1. Specifically, the engaging portion 12511 passes through the hole 124 and engages with one of the plurality of shift slots 1253. At this time, the engaging portion 12511 and the second operating portion 12512 are respectively located on both sides of the connecting plate 123. After the tray 12 is installed, the connecting plate 123 is located below the armrest portion 115 and engages with the armrest portion 115, thereby further positioning the tray 12 in the up-down direction and increasing the connection strength of the tray 12 in this direction. When the meal tray release 1251 is located at the seventh release position, the engaging portion 12511 is disengaged from at least one of the plurality of shift slots 1253, so that the meal tray 12 can be separated from the seat 1 or can be moved relative to the seat 1. Specifically, the engaging portion 12511 is withdrawn from the shift slot 1253, so that the meal tray 12 can be separated from the seat 1 and can be moved along the connecting plate 123. In this embodiment, the connecting plate 123 extends roughly along the front-to-back direction of the child seat. The moving direction of the meal tray 12 is roughly the front-to-back direction. The moving direction of the meal tray release 1251 is roughly perpendicular to the extending direction of the connecting plate 123, that is, the meal tray release 1251 can be moved roughly along the left-right direction of the child seat. It should be understood that the front in this article is the direction facing the child sitting in the child seat, the rear in this article is the direction facing away from the child sitting in the child seat, and the left and right directions in this article are correspondingly the left and right directions of the child sitting in the child seat.

When the dining tray 12 needs to be adjusted or removed, the dining tray release members 1251 on both sides can be pushed at the same time to move the dining tray release member 1251 from the seventh locking position to the seventh unlocking position, and the engaging portion 12511 of the dining tray release member 1251 exits the gear slot 1253. At this time, the dining tray 12 can be moved along the extending direction of the connecting plate 123, or the dining tray 12 can be removed from the seat 1. When the dinner plate 12 moves to a suitable position, one of the plurality of gear slots 1253 is aligned with the engaging portion 12511, and the external force is released at this time. The dinner plate release member 1251 moves from the seventh unlocking position to the seventh locking position under the elastic restoring force of the adjustment reset member 1252, so that the engaging portion 12511 of the dinner plate release member 1251 engages with the corresponding gear slot 1253. Thus, the position adjustment of the dinner plate 12 is realized.

The structure of the base 5 and the legs 6 in the third embodiment, as well as the connection relationship between the base 5 and the legs 6, can refer to the description in the second embodiment above. That is, the third embodiment includes the bracket assembly 300 described in the second embodiment.

More specifically, the base 5 may include the upper shell 501, the middle shell 503 and the lower shell 502 described in the second embodiment, each leg 6 may be connected to the first slide 761 through a connecting member 762, and the first slide 761 slides in the vertical direction along the slideway 5031 in the base 5. The first slide 761 is also connected to the stabilizer 763. The accommodating hole 5211 in this third embodiment corresponds to the bottom center hole of the lower shell 502 in the second embodiment. The adjustment seat 436 in this third embodiment can enter the center hole 5030 of the middle shell 503 from the center hole 5010 of the upper shell 501 in the second embodiment. The adjustment seat 436 can rotate around the axis R-R relative to the base 5. In addition, the bottom turntable 100a of the seat 1 in the second embodiment may correspond to the mounting seat 435 in the third embodiment, and the seat 1 in the second embodiment may be connected to the base 5 so as to be relatively rotatable via the seat adjustment device 400 in the third embodiment.

Fourth embodiment

An embodiment of the present invention provides a child seat (or referred to as a child seat, a high chair, or a chair). The child seat has multiple usage modes to meet the usage needs of different groups of people, and has a simple structure and is easy to manufacture.

As shown in Figures 59 and 61, the child seat includes a chair body 2000 and a seat assembly 100. The seat assembly 100 is detachably connected to the chair body 2000. The seat assembly 100 includes a seat (also referred to as a seat body) 1, a stopper 1113 and a dining tray 12. As shown in Figure 63, the seat 1 includes a seat portion 111, a backrest portion (also referred to as a back portion) 112 connected to the seat portion 111, and two side portions 113 respectively connected to the seat portion 111 and the backrest portion 112. The seat portion 111, the backrest portion 112 and the two side portions 113 together define the seating space of the seat assembly 100. Please also refer to Figure 68, the stopper 1113 is generally a T-shaped structure, including a stopper portion 1131 and a supporting portion 1132 connected to each other. One end of the stopper 1131 is connected to the approximate middle of the support 1132, and the stopper 1131 can also be formed integrally with the support 1132. The support 1132 is connected to the bottom of the meal tray 12. In this way, when a child sits on the seat assembly 100, the child's legs extend from both sides of the stopper 1131, and the stopper 1131 stops the child's crotch to restrict the child in the seating space and prevent the child from sliding off the seat assembly 100. The meal tray 12 is located above the support 1132 of the stopper 1113 to facilitate the child's meal. The dining tray 12 is detachably connected to the two side portions 113 and can move relative to the two side portions 113 so that the seat assembly 100 can be adapted to children of different sizes.

When the seat assembly 100 is mounted on the chair body 2000, as shown in FIG59, the child seat is in the first use mode, i.e., the high-legged dining chair mode. This mode is suitable for infants and young children between about six months and three years old to dine at the same table with adults, and the infants and young children can sit in the riding space without easily sliding off the high-legged dining chair. When the seat assembly 100 is removed from the chair body 2000, as shown in FIG60, the child seat is in the second use mode, i.e., the adult chair mode, which is suitable for adults over about 12 years old. The child seat in this mode is not limited to use as a dining chair, but can also be used in a variety of occasions such as learning or games.

Specifically, as shown in Figures 59 and 60, the chair body 2000 includes a seat plate 822, a support assembly (also referred to as a leg assembly) 200 connected to the seat plate 822, and a backrest 825 connected to the seat plate 822. The support assembly 200 includes a plurality of legs (also referred to as supporting legs) 6. Each leg 6 includes a first leg 601 and a second leg 602. One end of the first leg 601 is rotatably connected to the seat plate 822, and the other end is detachably connected to the second leg 602. As shown in Figure 61, when the seat assembly 100 is mounted on the chair body 2000 and the second leg 602 is detached from the first leg 601, the child seat is in the third usage mode, i.e., the small dining chair mode. This mode is suitable for infants and young children aged about six months to three years old to use for dining. Compared with the first use mode, the child seat in this mode is shorter and occupies less space, which is convenient for infants and young children to enter and exit the child seat independently, and can also be conveniently fixed on an ordinary dining chair for use. As shown in Figure 62, when the seat assembly 100 is removed from the chair body 2000 and the second leg 602 is also removed from the first leg 601, the child seat is in the fourth use mode, namely the child seat mode. This mode is suitable for infants and young children aged about 3 to 12 years old or children. The child seat in this mode is not limited to use as a dining chair, but can also be used in various occasions such as learning or games. The child seat of this embodiment has multiple use modes, which meets the use requirements in different scenarios and improves the use efficiency of the child seat.

Of course, in other embodiments, when the user only needs to use the second usage mode and the fourth usage mode, the child seat may also include only the chair body 2000. Alternatively, when the user only needs to use the first usage mode and the third usage mode, the child seat may also include the seat assembly 100 and the chair body 2000, and the first leg 601 and the second leg 602 of each leg 6 of the chair body 2000 are connected in a non-detachable manner, or each leg 6 is an integrally formed structure. Alternatively, when the user only needs to use the third usage mode and the fourth usage mode, the child seat may also include the seat assembly 100 and the chair body 2000, and each leg 6 of the chair body 2000 includes only the first leg 601. In short, the child seat can have different component structures according to the needs of the user.

In some embodiments, as shown in FIGS. 63 to 65 , the chair body 2000 is detachably connected to the seat assembly 100 via a seat disassembly mechanism 800. The seat disassembly mechanism 800 includes a first connecting member 831 and a second connecting member 832. The longitudinal direction Q1 is the front-back direction of the high chair in normal use, the transverse direction Q2 is the left-right direction of the high chair in normal use, and the vertical direction V is the height direction of the high chair in normal use.

63, the first connecting member 831 is rotatably disposed on the seat assembly 100 and can be switched between a fifth locking position (also referred to as a disassembly locking position) and a fifth unlocking position (also referred to as a disassembly unlocking position). Specifically, the first connecting member 831 is disposed on the backrest portion 112 of the seat assembly 100. The backrest 825 is provided with a connecting hole 8251. The side of the backrest 825 facing forward is the front side 8252, and the side of the backrest 825 facing backward is the back side 8253. When the first connecting member 831 is located at the fifth unlocking position, the first connecting member 831 can move along the longitudinal direction N (see Figure 67) with the seat assembly 100, that is, the first connecting member 831 can pass through the connecting hole 8251 from the front side 8252 of the backrest 825 to reach the back side 8253 of the backrest 825, or the first connecting member 831 can also exit the connecting hole 8251 from the back side 8253 of the backrest 825 to reach the front side 8252 of the backrest 825. At this time, the seat assembly 100 and the chair body 2000 can be separated. When the seat assembly 100 is mounted on the chair body 2000, when the first connecting member 831 is rotated by a specific angle so that the first connecting member 831 is in the fifth locking position, the backrest portion 112 of the seat assembly 100 and the first connecting member 831 are respectively located at the front and rear sides of the backrest 825, and the first connecting member 831 abuts against the backrest 825. That is, the seat assembly 100 is located at the front side 8252 of the backrest 825, the first connecting member 831 is located at the back side 8253 of the backrest 825, and the first connecting member 831 can abut against the back side 8253 of the backrest 825. At this time, since the backrest 825 is clamped between the first connecting member 831 and the backrest portion 112 of the seat assembly 100, the backrest portion 112 limits the seat assembly 100 from moving backward relative to the backrest 825, and the first connecting member 831 in the fifth locking position limits the seat assembly 100 from moving forward relative to the backrest 825, thereby making the seat assembly 100 relatively fixed relative to the chair body 2000.

As shown in FIGS. 63 to 65 , the backrest portion 112 of the seat assembly 100 is provided with a connecting protrusion 104 that can be plugged into the connecting hole 8251, and the first connecting member 831 is rotatably connected to the connecting protrusion 104. At least a portion of the outer contour of the connecting protrusion 104 abuts against the side wall of the connecting hole 8251 to prevent the connecting protrusion 104 from swinging or shaking in the first connecting hole 8251. In this embodiment, the outer contour shape of the connecting protrusion 104 is the same as the shape of the connecting hole 8251, and the cross-sectional area of the connecting protrusion 104 in a certain plane is equal to or slightly smaller than the cross-sectional area of the connecting hole 8251 in this plane. When the connecting protrusion 104 is fully inserted into the connecting hole 8251, the end surface of the connecting protrusion 104 slightly protrudes from the connecting hole 8251 or is flush with the end of the connecting hole 8251. This improves the stability of the connection between the seat assembly 100 and the chair body 2000, and prevents the seat assembly 100 from shaking or swaying relative to the chair body 2000 when the seat assembly 100 is fixed to the chair body 2000. In this embodiment, the number of the connecting protrusion 104, the first connecting member 831 and the connecting hole 8251 is two, so that the connection between the seat assembly 100 and the chair body 2000 is more stable. In other embodiments, the number of the connecting protrusion 104, the first connecting member 831 and the connecting hole 8251 can be one or more than two.

Referring to FIGS. 64 to 66 , a positioning protrusion 8254 is provided on the back surface 8253 of the backrest 825, and a positioning recess 8311 is provided on the first connector 831 accordingly. The positioning recess 8311 is provided on the side of the first connector 831 facing the back surface 8253 of the backrest 825. When the first connector 831 is located at the fifth locking position, the positioning protrusion 8254 is engaged with the positioning recess 8311, thereby limiting the further rotation of the first connector 831 and preventing the first connector 831 from being accidentally rotated to the fifth unlocking position. The first connector 831 is made of a material having a certain amount of elastic deformation, such as a plastic material. In this way, the first connector 831 can be deformed when operated to pass over the positioning protrusion 8254 and rotate between the fifth locking position and the fifth unlocking position. In other embodiments, the back side 8253 of the backrest 825 may be provided with a positioning recess 8311, and the first connector 831 may be provided with a positioning protrusion 8254 accordingly. The present invention is not limited thereto. Referring to FIG. 64 and FIG. 65 , the back side 8253 of the backrest 825 is provided with a recess 8255. When the first connector 831 is in the fifth locking position, the first connector 831 passes through the connecting hole 8251 and abuts against the bottom wall of the recess 8255. The bottom wall of the recess 8255 is a plane. When the backrest 825 has a certain curvature, the bottom wall of the recess 8255 can provide a relatively flat rotation space for the first connector 831, thereby facilitating the setting of the positioning protrusion 8254 and the positioning recess 8311, and facilitating user operation. The positioning protrusion 8254 is disposed on the bottom wall of the recess 8255. In this embodiment, there are two first connectors 831, and the two first connectors 831 are symmetrically distributed on the backrest 825 of the seat assembly 100. In other embodiments, there can be one or more than two first connectors 831. The present invention does not limit the number of first connectors 831.

As shown in FIG. 63 and FIG. 67 , the second connector 832 is disposed on the seat assembly 100. Specifically, the second connector 832 is disposed on the bottom of the seat assembly 100. In some embodiments, the second connector 832 is connected to or integrally formed on the lower surface of the seat portion 111 of the seat assembly 100. In this embodiment, the seat disassembly mechanism 800 includes two second connectors 832, and the two second connectors 832 are disposed at the front side of the seat portion 111. The second connector 832 is provided with a connecting groove 8321, and the second connector 832 is configured to engage with the seat plate 822 through the connecting groove 8321. Specifically, the front edge of the seat plate 822 engages with the connecting groove 8321. By connecting the second connecting member 832 and the seat plate 822, the connection between the seat assembly 100 and the chair body 2000 is more stable.

When the seat assembly 100 needs to be installed on the chair body 2000, the first connecting member 831 is rotated to the fifth unlocking position, the connecting groove 8321 of the second connecting member 832 is engaged with the front side of the seat plate 822, and the first connecting member 831 is completely passed through the connecting hole 8251 (refer to FIG. 6). At this time, the first connecting member 831 is rotated to the fifth locking position, the first connecting member 831 abuts against the bottom wall of the recess 8255 so that the seat assembly 100 is fixed on the chair body 2000, and the positioning recess 8311 of the first connecting member 831 is engaged with the positioning protrusion 8254 of the backrest 825 so that the first connecting member 831 is fixed in the fifth locking position. When the seat assembly 100 needs to be removed from the chair body 2000, an external force can be applied to the first connecting member 831 to rotate the first connecting member 831, and the positioning recess 8311 is separated from the positioning protrusion 8254, and the first connecting member 831 is further rotated to the fifth unlocking position. At this time, the seat assembly 100 can be moved, so that the first connecting member 831 exits the connecting hole 8251 and the connecting groove 8321 is separated from the seat plate 822, thereby realizing the disassembly of the seat assembly 100.

Furthermore, as shown in FIGS. 68 to 72 , the support assembly 200 includes, in addition to the plurality of legs 6 mentioned above, a leg seat (also referred to as a foot seat or a base) 6212, a footrest 6213 movably connected to the plurality of legs 6, and a second slide 6214 slidably connected to the plurality of legs 6. The plurality of legs 6 are pivoted to the leg seat 6212. The leg seat 6212 is connected to the seat plate 822, and the plurality of legs 6 are configured to pivot relative to the seat plate 822 so that the chair body 2000 can be switched between a high position and a low position. The high position means that the seat plate 822 of the chair body 2000 is relatively far from the ground or its supporting surface, and the low position means that the seat plate 822 of the chair body 2000 is relatively close to the ground or its supporting surface. The pedal member 6213 is movably connected to the plurality of legs 6. Specifically, each leg 6 is provided with a second sliding member 6214, and the pedal member 6213 is pivotally connected to the plurality of second sliding members 6214. In the present embodiment, the second sliding member 6214 is, for example, a sliding sleeve, each sliding sleeve is sleeved outside the corresponding leg 6 and can slide relative to the leg 6, and the pedal member 6213 is pivotally connected to the plurality of sliding sleeves respectively. A reinforcing member 62131 is provided near the position where the pedal member 6213 is pivotally connected to the sliding sleeve to enhance the strength of the connection of the pedal member 6213, thereby enhancing the strength of the pedal member 6213. The pedal member 6213 can move between a first position and a second position to drive the plurality of legs 6 to pivot.

Referring to FIG. 59 , when the pedal member 6213 is in the first position, the plurality of legs 6 are relatively far apart, and the chair body 2000 is in a low position. Please also refer to FIG. 60 , when the pedal member 6213 is in the second position, the plurality of legs 6 are relatively close together, and the chair body 2000 is in a high position. The pedal member 6213 is closer to the seat plate 822 in the first position than in the second position, that is, the second position of the pedal member 6213 is lower than the first position. In this way, when the child seat is switched from the first use mode shown in FIG. 59 to the second use mode shown in FIG. 60 , the pedal member 6213 can be moved from the first position to the second position, so that it is suitable for taller users to place their feet, and at the same time, the height of the seat plate 822 is correspondingly increased, thereby improving the user's comfort. The same applies when the child seat is switched from the second usage mode shown in FIG. 60 to the first usage mode shown in FIG. 59 .

As shown in FIGS. 68 to 71 , at least one of the plurality of legs 6 is provided with a first stopper 6215, the first stopper 6215 being located between the second slide 6214 and the seat plate 822, and the first stopper 6215 being adapted to abut against the second slide 6214 to limit the pedal 6213 from continuing to slide upward from the first position. At least one of the plurality of legs 6 is provided with a second stopper 6216, the second stopper 6216 being adapted to abut against the second slide 6214 to limit the pedal 6213 from continuing to slide downward from the second position. The first stopper 6215 is located above the second stopper 6216. The second sliding member 6214 can move between the first stopper 6215 and the second stopper 6216, so that the chair body 2000 can be switched between the low position and the high position. In this way, the height of the child seat can be adjusted, so that the child seat can meet different usage requirements in different usage scenarios, and the utilization rate of the child seat is further improved.

As shown in Figures 68 to 72, there are four legs 6, and four second sliding members 6214 are correspondingly provided, and the four second sliding members 6214 are respectively pivoted with the pedal members 6213. For ease of description, one of the legs 6 is taken as an example for explanation. In addition to the first leg 601 and the second leg 602 described above, each leg 6 also includes a connecting joint 62113 and a mounting member 62114. The leg seat 6212 is provided with a joint receiving groove 62122, which faces the leg 6 and can accommodate at least a portion of the connecting joint 62113, and the connecting joint 62113 can rotate relative to the joint receiving groove 62122. The leg seat 6212 is provided with a limiting hole 62123 which is connected to the bottom wall of the joint receiving groove 62122. The mounting member 62114 is provided on a side of the leg seat 6212 away from the leg 6 and is connected to the connecting joint 62113 by a fastener such as a bolt. The mounting member 62114 has a limiting protrusion 621141, at least a portion of which is accommodated in the limiting hole 62123. The limiting protrusion 621141 can abut against the side wall of the limiting hole 62123 when the connecting joint 62113 rotates, thereby limiting the rotation stroke of the connecting joint 62113, and further limiting the rotation stroke of the leg 6, thereby also limiting the high position state and the low position state of the chair body 2000.

Specifically, one end of the first leg 601 is connected to the connecting joint 62113. The other end of the first leg 601 is detachably connected to the second leg 602. Optionally, the first leg 601 and the second leg 602 are connected by, for example, a snap connection, a threaded connection, etc. In this embodiment, the first leg 601 and the second leg 602 are both metal tubes with a hollow inner cavity 62115. The first limiter 6215 is provided on the first leg 601, and the second limiter 6216 is provided on the second leg 602. The connecting joint 62113 is made of, for example, plastic. A foot (also referred to as a foot pad) 603 is provided at one end of the second leg 602 away from the first leg 601, and the foot 603 can be detachably connected to the second leg 602 or the first leg 601. The support leg 603 is made of, for example, plastic, so that the noise caused by friction between the support leg 6 and the ground or the supporting surface can be reduced.

When the child seat is in the first use mode as shown in FIG59 or the second use mode as shown in FIG60, the foot 603 is connected to the second leg 602. When the child seat is in the third use mode as shown in FIG61 or the fourth use mode as shown in FIG62, the foot 603 can be removed from the second leg 602 and connected to the first leg 601 (as shown in FIGS. 61 and 62).

Furthermore, as shown in FIGS. 69 , 71 and 72 , the chair body 2000 further includes a folding mechanism (also referred to as a folding mechanism) 923. The folding mechanism 923 is used to lock the second sliding member 6214 in the first position or the second position. When the folding mechanism 923 is in a locked state, the folding mechanism 923 can lock the second sliding member 6214 relative to the plurality of legs 6, and when the folding mechanism 923 is in an unlocked state, the second sliding member 6214 can slide relative to the plurality of legs 6. For example, when the second sliding member 6214 is in the first position and the folding mechanism 923 is in a locked state, the chair body 2000 is locked in a low position. When the folding mechanism 923 is in the unlocked state (the second sliding member 6214 can be located at the first position or the second position), the second sliding member 6214 can slide between the first position and the second position, so that the chair body 2000 can freely switch between the high position and the low position. Specifically, when the folding mechanism 923 is in the locked state, the folding mechanism 923 is engaged with the second sliding member 6214, so that the second sliding member 6214 cannot slide relative to the leg 6, thereby limiting the footrest member 6213 to the first position. When the folding mechanism 923 is in the unlocked state, the folding mechanism 923 is released from the second sliding member 6214, so that the second sliding member 6214 can slide relative to the leg 6, thereby allowing the pedal member 6213 to move freely between the first position and the second position.

Referring to FIG. 68 and FIG. 70 , there are two folding mechanisms 923, which are symmetrically arranged on the bracket assembly 200, so that the pedal 6213 can be locked in the first position more stably. In other embodiments, the number of folding mechanisms 923 can be one, two or three. The present invention is not limited to this. For the convenience of description, one of the folding mechanisms 923 is used as an example for description below.

In this embodiment, the folding mechanism 923 is arranged on the upper part of the supporting leg, so that the low position state of the chair body can be locked. In other embodiments not shown, the folding mechanism 923 can also be additionally arranged on the lower part of the supporting leg, so that the low position state and the high position state of the chair body can be locked respectively.

In some embodiments, as shown in FIG. 69 , FIG. 71 and FIG. 72 , the folding mechanism 923 includes a clamping member 9231, a driving member 9232, a fixing seat 9233, a folding reset member 9234, a folding operating member 9235 and a pulling member 9236. The folding operating member 9235 is connected to the driving member 9232 via the pulling member 9236, and the driving member 9232 is drivingly connected to the clamping member 9231. The fixing seat 9233 is fixedly disposed on the leg 6, specifically, the fixing seat 9233 is accommodated in the hollow inner cavity 62115 of the first leg 601, and is connected to the first leg 601 together with a first stopper 6215 disposed outside the hollow inner cavity 62115 via a fastener such as a bolt.

In this embodiment, the folding mechanism 923 includes two engaging members 9231, two driving members 9232, two fixing seats 9233, two folding and resetting members 9234, two pulling members 9236 and a folding operating member 9235. The two engaging members 9231, the two driving members 9232, the two fixing seats 9233 and the two folding and resetting members 9234 are respectively disposed in two adjacent legs 6, and one end of the two pulling members 9236 is respectively connected to the two driving members 9232, and the other end is connected to the folding operating member 9235. In this way, the movement of the driving members 9232 in the two legs 6 can be controlled simultaneously through a folding operating member 9235, thereby controlling the movement of the engaging member 9231, and making the locking of the pedal member 6213 more stable.

In other embodiments, the folding mechanism 923 may also only include a folding operating member 9235 and a locking member 9231 disposed in one of the legs 6, a driving member 9232, a fixing seat 9233, a folding reset member 9234 and a pulling member 9236.

The structure is specifically described below by taking the folding operating member 9235 in the folding mechanism and the engaging member 9231, the driving member 9232, the fixing seat 9233, the folding reset member 9234 and the pulling member 9236 disposed in one of the legs 6 as an example.

As shown in FIG. 69 and FIG. 71 , the fixing seat 9233 is provided with a guide groove 92331. The guide groove 92331 extends in a direction parallel to the moving direction of the driving member 9232, that is, the guide groove 92331 extends in a direction parallel to the length of the first leg 601. The engaging member 9231 can move between a fourth locking position (also referred to as a retracted locking position) and a fourth releasing position (also referred to as a retracted releasing position). At least a portion of the engaging member 9231 is accommodated in the hollow inner cavity 62115 of the first leg 601. One end of the engaging member 9231 is connected to the fixing seat 9233. Specifically, the fixing seat 9233 is provided with a first receiving groove 92332, and the guide groove 92331 is arranged on the side wall of the first receiving groove 92332. One end of the engaging member 9231 is plugged into and matched with the first accommodating groove 92332 and is connected to the driving pin 9237. Specifically, the engaging member 9231 is provided with a driving groove 9239, and the extension direction of the driving groove 9239 is staggered and not perpendicular to the moving direction M1 of the engaging member 9231, that is, the extension direction of the driving groove 9239 is inclined relative to the moving direction of the engaging member 9231. The driving pin 9237 is plugged into and matched with the driving groove 9239 and the guide groove 92331 of the fixing seat 9233. The driving pin 9237 can move along the guide groove 92331. Such a configuration enables the engaging member 9231 to move along the extension direction of the first receiving groove 92332, thereby preventing the engaging member 9231 from being offset when moving between the fourth locking position and the fourth unlocking position. The other end of the engaging member 9231 is the engaging end 92311. The first leg 601 is provided with a through hole 62116 for the engaging end 92311 to pass through. When the engaging member 9231 is in the fourth locking position, the engaging end 92311 of the engaging member 9231 passes through the through hole 62116, and the engaging end 92311 is plugged into the engaging hole 9238 of the second sliding member 6214. When the engaging member 9231 is at the fourth unlocking position, the engaging end 92311 of the engaging member 9231 is disengaged from the engaging hole 9238 , so that the second sliding member 6214 can move relative to the supporting leg 6 .

The chair body 2000 in this embodiment makes the engaging member 9231 move between the fourth locking position and the fourth unlocking position so that the second sliding member 6214 is fixed or movable relative to the leg 6, thereby selectively locking the footrest member 6213 in the first position, that is, selectively locking the chair body 2000 in the low position.

As shown in FIGS. 69 and 71 , the driving member 9232 is accommodated in the hollow inner cavity 62115 of the first leg 601. The fixing seat 9233 is provided with a second accommodating groove 92333, and at least a portion of the driving member 9232 is accommodated in the second accommodating groove 92333 and can move relative to the second accommodating groove 92333. The driving member 9232 is connected to the driving pin 9237. In this embodiment, the moving direction M2 of the driving member 9232 is substantially parallel to the extending direction of the first leg 601, and the moving direction M1 of the engaging member 9231 is substantially perpendicular to the extending direction of the first leg 601. The driving pin 9237 is plug-fitted with the driving groove 9239 and can move along the driving groove 9239. Specifically, the driving pin 9237 passes through the driving groove 9239 and the guide groove 92331 and realizes the driving connection between the engaging member 9231 and the driving member 9232. In other embodiments not shown, the driving member 9232 may be provided with the driving groove 9239, and the driving pin 9237 may be fixedly or detachably provided on the engaging member 9231. The moving direction M2 is substantially perpendicular to the moving direction M1.

As shown in FIG. 69 and FIG. 71 , the folding and restoring member 9234 is disposed between the driving member 9232 and the fixing seat 9233, and the folding and restoring member 9234 is suitable for biasing the driving member 9232 to drive the engaging member 9231 to move to the fourth locking position. The folding and restoring member 9234 can be an elastic member such as a spring or an elastic sheet. In this embodiment, referring to FIG. 59 and FIG. 71 , a portion of the driving member 9232 accommodated in the second receiving groove 92333 forms a boss 92321. The folding and restoring member 9234 is accommodated in the second receiving groove 92333. One end of the folding and restoring member 9234 abuts against the side wall of the second receiving groove 92333, and the other end of the folding and restoring member 9234 is sleeved on the boss 92321. Such a configuration can prevent the folding and restoring member 9234 from being offset during the deformation process.

As shown in Figures 69, 71 and 72, the folding operating member 9235 is operably disposed on the leg seat 6212. Specifically, the folding operating member 9235 is operably disposed on the side of the leg seat 6212 that is away from the seat plate 822, that is, the folding operating member 9235 is operably disposed on the lower side of the leg seat 6212. One end of the traction member 9236 is accommodated in the hollow inner cavity 62115 of the first leg 601 and connected to the driving member 9232, and the other end of the traction member 9236 passes through the hollow inner cavity 62115 of the first leg 601 and is connected to the folding operating member 9235. The traction member 9236 is, for example, a driving cable such as a steel cable or a carbon fiber cable. When the folding operating member 9235 is operated, the folding operating member 9235 drives the driving member 9232 to move through the pulling member 9236, so as to drive the engaging member 9231 to move from the fourth locking position to the fourth unlocking position. When the external force applied to the folding operating member 9235 is released, the driving member 9232 drives the folding operating member 9235 to return to the initial position through the pulling member 9236 under the elastic restoring force of the folding reset member 9234.

68 and 69, when the pedal member 6213 is in the first position, the engaging hole 9238 of the second sliding member 6214 is opposite to the through hole 62116 of the leg 6, and the engaging end 92311 of the engaging member 9231 passes through the through hole 62116 and engages with the engaging hole 9238. At this time, the folding mechanism 923 is in a locked state, the second sliding member 6214 cannot slide relative to the leg 6, and the pedal member 6213 is locked in the first position, that is, the chair body 2000 is locked in a low position. When the height of the chair body 2000 needs to be adjusted, the folding operating member 9235 is operated to move to drive the driving member 9232 to move upward along the M2 direction through the pulling member 9236, and the driving connection between the driving pin 9237 and the driving groove 9239 drives the engaging member 9231 to move from the fourth locking position to the fourth releasing position along the M1 direction, so that the engaging end 92311 of the engaging member 9231 is disengaged from the engaging hole 9238 (refer to Figure 71). At this time, an external force is applied to the pedal member 6213 to move the pedal member 6213 to the second position. When the pedal member 6213 moves to the point where the second sliding member 6214 is no longer in contact with the engaging member 9231, the external force applied to the folding operating member 9235 is released, and the driving member 9232 moves downward along the M2 direction under the elastic restoring force of the folding reset member 9234. The driving member 9232 drives the folding operating member 9235 to move to the initial position through the traction member 9236, and drives the engaging member 9231 to reset to the second locking position along the M1 direction through the cooperation between the driving pin 9237 and the driving groove 9239. Since the through hole 62116 and the engaging hole 9238 are misaligned at this time, the driving pin 9237 cannot engage with the engaging hole 9238, and the second sliding member 6214 can move relative to the leg 6, that is, the pedal member 6213 can move relative to the leg 6. When the pedal member 6213 moves to a suitable position, that is, when the chair body 2000 is adjusted to a desired height, the external force applied to the pedal member 6213 is released. The pedal member 6213 is fixed at the suitable position (the suitable position can be, for example, the second position, or any position between the first position and the second position) under the action of its own weight and the friction between the second sliding member 6214 and the leg 6.

In some embodiments, as shown in FIGS. 73 to 75 , the seat plate 822 includes a first seat plate 8221 and a second seat plate 8222, and the first seat plate 8221 is provided with a first receiving groove 82211. The second seat plate 8222 is provided at the notch of the first receiving groove 82211. Specifically, the first seat plate 8221 is fixedly connected to the second seat plate 8222. The second seat plate 8222 is provided around the leg seat 6212 of the bracket assembly 200. The notch of the first receiving groove 82211 faces the direction of the leg seat 6212, that is, the first seat plate 8221 is located above the leg seat 6212. In this embodiment, the first seat plate 8221 and the second seat plate 8222 are connected by fasteners such as bolts. In other embodiments, the first seat plate 8221 and the second seat plate 8222 are detachably connected, for example, by means of a snap connection, a threaded connection, etc. In this embodiment, the leg seat 6212 is a disc-shaped structure, the second seat plate 8222 is a ring-shaped structure disposed around the leg seat 6212, and the first seat plate 8221 is a disc-shaped structure that can cover the leg seat 6212 and the second seat plate 8222.

73 , the chair body 2000 further includes a connecting rod 826, one end of which is connected to the backrest 825, and the other end of which extends into the first receiving groove 82211 and is connected to the second seat plate 8222. In other embodiments not shown, the other end of the connecting rod 826 may be connected to the first seat plate 8221.

As shown in FIG. 75 , the first receiving groove 82211 has an annular first side wall 82212 and an annular second side wall 82213 surrounding the first side wall 82212. The second side wall 82213 is farther from the rotation axis R-R of the seat plate 822 than the first side wall 82212. The leg seat 6212 is provided with a rotating connection portion 62124, at least a portion of which is received in the first receiving groove 82211 and abuts against the first side wall 82212 of the first receiving groove 82211, so that the seat plate 822 can rotate around the rotation axis R-R relative to the leg seat 6212. An opening 82223 is formed between the second seat plate 8222 and the first seat plate 8221. Specifically, an opening 82223 is formed between the second seat plate 8222 and the first side wall 82212. At least a portion of the rotating connection portion 62124 passes through the opening 82223 and is engaged with the first side wall 82212 of the first receiving groove 82211. In other embodiments not shown, the rotating connection portion 62124 may abut against the second side wall 82213 of the first receiving groove 82211. In other embodiments not shown, the rotating connection portion 62124 may also pass through the opening 82223 and be engaged with the second seat plate 8222. The present invention is not limited to this.

In some embodiments, as shown in FIGS. 73 to 75 , the chair body 2000 further includes a rotation adjustment mechanism (also referred to as a rotation positioning mechanism) 924, which can selectively position the seat plate 822 at a desired angle. Specifically, when the rotation adjustment mechanism 924 is in an unlocked state, the seat plate 822 can rotate relative to the leg support 6212, so that the seat plate 822 can rotate relative to the leg support 6212. When the rotation adjustment mechanism 924 is in a locked state, the seat plate 822 cannot rotate relative to the leg support 6212, so that the seat plate 822 can be locked at a desired angle.

As shown in FIGS. 73 to 75 , the rotation adjustment mechanism 924 includes a positioning member 9241, a positioning reset member 9242, and a positioning operating member 9243. The positioning operating member 9243 is drivingly connected to the positioning member 9241. The leg support seat 6212 is provided with a first positioning groove 9244, and the seat plate 822 is provided with a second positioning groove 9245. When the rotation adjustment mechanism 924 is in a locked state, the positioning member 9241 is in a third locking position, and the positioning member 9241 is simultaneously engaged with the first positioning groove 9244 and the second positioning groove 9245. That is, a portion of the first positioning member 9241 is accommodated in the first positioning groove 9244, and another portion of the positioning member 9241 is accommodated in the second positioning groove 9245, so that the seat plate 822 cannot rotate relative to the leg support seat 6212, thereby locking the seat plate 822 at a desired angle. When the rotation adjustment mechanism 924 is in the unlocked state, the positioning member 9241 is in the third unlocked position, and the positioning member 9241 is disengaged from the second positioning groove 9245, that is, the positioning member 9241 is only accommodated in the first positioning groove 9244, so that the seat plate 822 can rotate relative to the leg support 6212, thereby adjusting the angle of the seat plate 822 relative to the leg support 6212. In other embodiments not shown, when the rotation adjustment mechanism 924 is in the unlocked state, the positioning member 9241 is disengaged from the first positioning groove 9244, that is, the positioning member 9241 is only accommodated in the second positioning groove 9245, so that the seat plate 822 can rotate relative to the leg support 6212, thereby adjusting the angle of the seat plate 822 relative to the leg support 6212.

As shown in FIGS. 73 to 75 , the positioning member 9241 includes a positioning portion 92411 for engaging with the second positioning groove 9245 and the first positioning groove 9244, and the cross-section of the positioning portion 92411 is a non-circular rotationally symmetrical figure. In this embodiment, the cross-section of the positioning portion 92411 is generally "+"-shaped, so that the seat plate 822 can be locked at four angle positions relative to the leg seat 6212, and every two adjacent angle positions are 90 degrees apart. The "+"-shaped positioning portion 92411 can be formed by, for example, two mutually staggered rectangles, or by, for example, two mutually staggered ellipses. In other embodiments not shown, the positioning portion 92411 may also be formed by a rectangle or an ellipse, or the positioning portion 92411 may be formed by more than three mutually staggered rectangles or more than three mutually staggered ellipses. In other embodiments not shown, the cross-section of the positioning portion 92411 may also be a regular polygon, such as an equilateral triangle, a regular quadrilateral, a regular hexagon, etc. The present invention does not limit the specific shape of the cross-section of the positioning portion 92411. A person skilled in the art may select a suitable cross-sectional shape of the positioning portion 92411 according to the angle required for positioning. For example, if six angular positions are required, the cross-section of the positioning portion 92411 may be selected as three mutually staggered rectangles or ellipses, or a single regular hexagon. The shapes and sizes of the first positioning groove 9244 and the second positioning groove 9245 correspond to those of the positioning portion 92411 respectively.

As shown in FIG. 75 , the positioning operating member 9243 is operably disposed on the leg support 6212. The positioning operating member 9243 is disposed on a side of the leg support 6212 that is away from the first positioning groove 9244, and the positioning operating member 9243 is drivingly connected to the positioning member 9241 through a fastener 9249 such as a bolt. When operated, the positioning operating member 9243 can drive the positioning member 9241 to move through a fastener such as a bolt. The bottom of the first positioning groove 9244 or the bottom of the second positioning groove 9245 can abut against the positioning member 9241, thereby limiting the movement stroke of the positioning member 9241, thereby limiting the movement stroke of the positioning operating member 9243.

As shown in FIG. 75 , the positioning reset member 9242 is suitable for biasing the positioning member 9241 to switch the rotation adjustment mechanism 924 to the locked state. The positioning reset member 9242 can be an elastic member such as a spring or a spring sheet. In this embodiment, the positioning reset member 9242 is a compression spring, and the positioning reset member 9242 is arranged between the positioning member 9241 and the leg support 6212. Specifically, please refer to FIG. 73 , the positioning member 9241 has a positioning connection portion 92412. The positioning portion 92411 is arranged around the positioning connection portion 92412 and is rotationally symmetrical about the rotation axis R-R of the seat plate 822. A third receiving groove 92413 is formed on one side of the positioning connection portion 92412 facing the leg seat 6212, and a boss 92441 is provided at the bottom of the first positioning groove 9244. One end of the positioning reset member 9242 is sleeved on the boss 92441 and abuts against the bottom of the first positioning groove 9244, and the other end of the positioning reset member 9242 abuts against the bottom of the third receiving groove 92413. This arrangement can prevent the positioning reset member 9242 from shifting during the deformation process. When the positioning operating member 9243 is pulled downward, the positioning member 9241 is driven to move downward and compress the positioning reset member 9242, so that the positioning member 9241 is released from the second positioning groove 9245. When the pulling force applied to the positioning operating member 9243 is released, under the elastic restoring force of the compressed positioning reset member 9242, the positioning member 9241 moves upward to a locked state engaged with the second positioning groove 9245 and drives the positioning operating member 9243 to move upward.

In some other embodiments not shown, the positioning reset member 9242 may also be disposed between the seat plate 822 and the positioning member 9241, for example, between the bottom of the second positioning groove 9245 and the positioning member 9241. The positioning reset member 9242 is, for example, a compression spring. When the positioning operating member 9243 is pressed upward, the positioning member 9241 is driven to move upward and compress the positioning reset member 9242, so that the positioning member 9241 is released from the first positioning groove 9244. When the pressing force applied to the positioning operating member 9243 is released, under the elastic restoring force of the compressed positioning reset member 9242, the positioning member 9241 moves downward to a locked state engaged with the second positioning groove 9245 and drives the positioning operating member 9243 to move downward.

In some embodiments, as shown in Figures 75 to 77, the positioning operating member 9243 can rotate relative to the leg support 6212. The end surface of the leg support 6212 facing the positioning operating member 9243 is provided with a positioning rib 62121, and the positioning operating member 9243 is correspondingly provided with a retaining rib 92431, which can operably abut against the positioning rib 62121 to keep the rotation adjustment mechanism 924 in a released state, so that the seat plate 822 of the chair body 2000 can rotate freely, so as to facilitate use by older children or adults. Specifically, the positioning rib 62121 is provided with an abutting end 62121a and an inclined surface 62121b, and the inclined surface 62121b is connected to the abutting end 62121a and the lower end surface of the leg seat 6212, respectively, so that when the positioning operating member 9243 is rotated, the retaining rib 92431 can move along the inclined surface 62121b to abut against the abutting end 62121a, thereby keeping the rotation adjustment mechanism 924 in the unlocked state. The positioning rib 62121 is also provided with a limiting end 62121c protruding from the abutting end 62121a, so as to prevent the positioning operating member 9243 from rotating excessively and being misaligned with the abutting end 62121a and failing to abut. When it is not necessary to keep the rotation adjustment mechanism 924 in the unlocked state, the positioning operating member 9243 is rotated in the reverse direction to make the retaining rib 92431 misaligned with the abutting end 62121a and the inclined surface 62121b, that is, the retaining rib 92431 is misaligned with the positioning rib 62121, thereby switching the rotation adjustment mechanism 924 to the locked state. In this embodiment, the number of the positioning ribs 62121 is at least two, for example, three, four, six, etc. At least two positioning ribs 62121 are rotationally symmetrically distributed relative to the rotation axis R-R of the seat plate 822. Accordingly, the number of the retaining ribs 92431 is at least two, for example, three, four, six, etc. At least two retaining ribs 92431 are rotationally symmetrically distributed relative to the rotation axis R-R of the seat plate 822.

In some embodiments, as shown in FIGS. 73 and 75 , the support assembly 200 further includes a roller 6217. The roller 6217 is disposed on the leg support base 6212 and is capable of rotating relative to the leg support base 6212. At least a portion of the seat plate 822 is in rolling contact with the roller 6217. In this embodiment, the outer side surface of the first side wall 82212 of the first receiving groove 82211 is in rolling contact with the roller 6217. This arrangement can assist the seat plate 822 to rotate relative to the leg support base 6212. Specifically, the roller 6217 has a first inclined surface 62171, and the seat plate 822 is provided with a second inclined surface 82214 around the rotation axis R-R of the seat plate 822, and the second inclined surface 82214 is in rolling contact with the first inclined surface 62171. In this embodiment, the number of rollers 6217 includes at least two, for example, three, five, six, etc. At least two rollers 6217 are symmetrically distributed relative to the rotation axis R-R of the seat plate 822.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

1000: High chair 2: Height adjustment mechanism 7: Folding mechanism 100: Seat assembly 200: Bracket assembly 1: Seat 12: Tray 13: Backrest 14: Footrest 16: Safety strap 6: Leg 5: Base 27: Support seat H1: First horizontal direction 21: Adjustment member 31: First axis P1, P2, P3, P4: Connection point V: Vertical direction G1: First height G2: Second height S1: First area S2: Second area 275: Third locking member 2751: Operating part 270: Longitudinal hole 50: Positioning hole 44: Fourth elastic element 271: Support member H2: Second horizontal direction 211: Connecting arm 2111: Slide 102: convex column 212: side plate 2710: mounting hole 28: angle limiting mechanism 281: first arc groove 282: elastic telescopic pin 2712: inclined plane 22: first locking member 101: slot 11: side wall 23: slider 32: second axis 2301, 220, 2110, 150: through hole 230: concave cavity 15: cover 151, 105, 240, 50201, 5027, 124: hole 10: accommodating cavity 110: first elongated hole 41: first elastic element 24: first driving member F1: external force 221: first pin 2302, 250: elongated hole 241: driving inclined plane 25: first release member 152: bump 252: operating part 261: first lead member 242, 251: mounting part 262: protective cover 42: second elastic element 71: adjustment seat 72: connecting member 33: third axis 721: slot 61: slide rail 62: locking groove 73: second locking member L: length direction 731: second long hole 720: groove 74: second release member 75: second lead member 43: third elastic element 711: upper shell 712: lower shell 70: inner cavity 740: second arc groove M: center 7521: second pin 741: operating part T: torque 751: link 752: second drive member 34: fourth axis 35: fifth axis 51: reinforcement sheet 511: pivot seat 601: upper leg 602: lower leg 603: support foot 610: hook 8: storage bag 300: bracket assembly 761: first slide member 762: link 100a: bottom turntable 501: upper shell 503: middle shell 502: lower shell 5001: storage chamber 5010, 5030, 7630, 7611: center hole 50311: column 5031: slideway 5032: mounting seat 50320: pivot hole 625: pivot 5021: first through slot 551, 552: pivot 7610: slot 7613: recess 623: reinforcement 622: cover 6220: second through slot 763: stabilizer 766: first motion conversion mechanism 405: connection X-X: rotation axis 7631: arc hole 7612: through hole 7660: first drive inclined slot 7661: first drive pin 7632: mounting hole 767: locking member H: horizontal direction 7614: locking part 76140: locking recess 7671: locking protrusion 768: release member 769: elastic member 7680: receiving groove 5025: slide groove 7662: second motion conversion mechanism 76620: second drive chute 76621: second drive pin 7681: operating part 400: seat adjustment device 5211: accommodating hole 431: first adjustment column 432: second adjustment column 433: height adjustment mechanism 435: mounting seat 436: adjustment seat 437: rotation adjustment mechanism 4351: upper cover 4352: lower cover 4353: connecting tube 4354: first accommodating chamber 4337: height operating member 4355: second accommodating chamber 4331: height locking member 4337: height operating member 4311: hollow inner cavity 4332: height driving member 4333: fixing seat 4334: first reset member 4336: adjustment hole 43331: first part 43332: second part 43337: ear plate 43336: first receiving groove 43338: first boss 43333: guide groove 4322: protrusion 4323: adjustment tube 4321: pipe plug 4322: protrusion 43335: groove 43334: insertion hole 4335: first driving pin 43311: first engaging end 4312: first through hole 43339: second through hole 43321: first driving groove D1, D2, D3, D4, D5, D6, D7, D8, D9, D10: moving direction 43322: first reset member receiving groove 4337: height operating member 4338: pulling member 4339: Second reset member 43371: First operating portion 43372: First connecting portion 4356: First through hole 43373: Second reset member receiving groove 438: Anti-escape mechanism 4381: Elastic finger 4382: Engagement groove 4361: First receiving groove 43811: Hook portion 4371: Rotation locking member 4372: Rotation operating member 4373: Rotation reset member 4374: Slot 43711: Second engagement end 4362: Second receiving groove 4363: Second through hole R-R: Pivot shaft 4364: Connecting hole 43723: Connecting column 43721: Second driving surface 43722: Insertion portion 43713: Insertion groove 43712: first driving surface 43714: third reset member receiving groove 500: seat disassembly mechanism 111: seat 112: backrest 113: side 541: disassembly lock 542: disassembly release 543: disassembly reset 544: engaging hole 545: engaging recess 4358: connecting groove 5411: hook 5412: base 5421: engaging protrusion 1014: receiving hole 5422: operating recess 1113: stopper 1031: stopper 1032: supporting part 10311: mounting groove 1015: second receiving groove 5423: abutting part 5424: second protrusion 12A: meal tray adjustment mechanism 115: armrest 1251: meal tray release 1252: adjustment reset 1253: gear slot 121: front 122: back 123: connecting plate 125: limiter 126: reinforcing rib 12511: locking part 12512: second operating part 1513: strip groove 127: connecting pin 2000: chair body 1131: stopper 1132: support part 822: seat plate 825: backrest 800: seat disassembly mechanism 831: first connecting part 832: second connecting part Q1: longitudinal direction Q2: transverse direction 8251: connecting hole 8252: front 8253: back N: longitudinal direction 104: connecting protrusion 8254: positioning protrusion 8311: positioning recess 8255: recess 8321: connecting groove 6212: leg support 6213: pedal 6214: second sliding member 6214: second sliding member 62131: reinforcing member 6215: first limiting member 6216: second limiting member 62113: connecting joint 62114: mounting member 62122: joint receiving groove 62123: limiting hole 621141: limiting protrusion 62115: hollow inner cavity 923: folding mechanism 9231: engaging member 9232: driving member 9233: fixing seat 9234: folding reset member 9235: folding operating member 9236: pulling member 92331: guiding groove 92332: first receiving groove 9237: driving pin 9239: driving groove M1, M2: moving direction 92311: clamping end 62116: through hole 9238: clamping hole 92333: second receiving groove 92321: boss 8221: first seat plate 8222: second seat plate 82211: first receiving groove 826: connecting rod 82212: first side wall 82213: second side wall 62124: rotating connecting part 82223: opening 924: rotating adjustment mechanism 9241: positioning member 9242: positioning reset member 9243: positioning operating member 9244: first positioning groove 9245: Second positioning groove 92411: Positioning part 9249: Fastener 92412: Positioning connection part 92413: Third accommodation groove 92441: Boss 62121: Positioning rib 92431: Retaining rib 62121a: Abutment end 62121b: Inclined surface 62121c: Limiting end 6217: Roller 62171: First inclined surface 82214: Second inclined surface

FIG. 1 is a three-dimensional diagram of a high chair provided in an embodiment of the present invention, wherein the high chair is provided with a height adjustment mechanism and a folding mechanism.

FIG. 2 is a partial front view of the high chair of FIG. 1 , wherein the height adjustment mechanism supports the seat at a height.

FIG. 3 shows a partial front view of the high chair of FIG. 1 , wherein the height adjustment mechanism supports the seat at another height.

FIG. 4 is a rear perspective view of the high chair of FIG. 1 .

FIG. 5 shows a U1 - U1 cross-sectional view of the high chair of FIG. 2 .

FIG. 6 shows a U2-U2 cross-sectional view of the high chair of FIG. 5 .

FIG. 7 is a perspective view showing the adjustment member of the high chair of FIG. 1 .

FIG. 8 is a three-dimensional view showing the support base of the high chair of FIG. 1 .

FIG. 9 is a bottom perspective view of the seat of the high chair of FIG. 1 .

FIG. 10 is a perspective view showing the first locking member and the first driving member of the high chair of FIG. 1 .

FIG. 11 is a perspective view showing some parts of the height adjustment mechanism of the high chair of FIG. 1 .

FIG. 12 is a bottom perspective view of the high chair of FIG. 1 .

FIG. 13 is a partially exploded view showing one orientation of the high chair of FIG. 1 .

FIG. 14 is a partially exploded view of the high chair of FIG. 1 from another direction.

FIG. 15 is a three-dimensional view of the high chair of FIG. 1 , wherein the folding mechanism supports the base at a certain height.

FIG. 16 is a perspective view of the high chair of FIG. 1 , wherein the folding mechanism supports the base at another height.

FIG. 17 is a bottom-up perspective view of the high chair of FIG. 16 .

FIG. 18 shows a U3-U3 cross-sectional view of the support assembly of the high chair of FIG. 16 , wherein the support assembly is in an open state.

FIG. 19 is a cross-sectional view showing the support assembly of FIG. 18 in a folded state.

FIG. 20 is a top perspective view of some parts of the support assembly of the high chair of FIG. 1 , wherein the second locking member is engaged with the corresponding locking groove.

FIG. 21 is a top perspective view of some parts of the support assembly of the high chair of FIG. 1 , wherein the second locking member is disengaged from the corresponding locking groove.

FIG. 22 is a perspective view of the high chair of FIG. 1 , wherein the lower legs of each leg are removed.

FIG. 23 is a three-dimensional diagram of a vehicle provided by an embodiment of the present invention, wherein the vehicle has a folding leg structure, and the folding leg structure is in an unfolded state.

FIG. 24 shows a U4-U4 cross-sectional view of the leg folding structure in FIG. 23 .

FIG. 25 shows another three-dimensional view of the vehicle of FIG. 23 , wherein the leg folding structure is in a folded state.

FIG. 26 shows a U5-U5 cross-sectional view of the leg folding structure in FIG. 25 .

FIG. 27 is an exploded view of the leg folding structure in FIG. 23 .

FIG. 28 is a top view of the folding leg structure in FIG. 23 , in which the base is omitted.

FIG. 29 is a side view of the leg folding structure in FIG. 23 .

FIG30 shows a U6-U6 cross-sectional view of FIG29, in which the stabilizer is omitted.

FIG. 31 is a three-dimensional diagram showing the locking member, the unlocking member and the elastic member in FIG. 27 assembled together.

FIG. 32 is another three-dimensional diagram showing the locking member, the releasing member and the elastic member in FIG. 27 assembled together.

FIG. 33 is a schematic diagram showing the structure of a child seat provided in an embodiment of the present invention.

FIG. 34 is a schematic diagram showing the structure of the child seat in FIG. 33 after being raised.

FIG. 35 shows a left view of the child seat in FIG. 34 .

FIG. 36 shows a cross-sectional view of the child seat along line U7-U7 in FIG. 35 .

FIG. 37 is an enlarged view of point A in FIG. 36 .

FIG. 38 is an enlarged view of point B in FIG. 37 .

FIG. 39 is a schematic diagram showing the structure of a bracket assembly and a second adjustment column provided in an embodiment of the present invention.

FIG. 40 is an enlarged view of point C in FIG. 39 .

FIG. 41 is a schematic diagram showing the structure of a mounting base provided in an embodiment of the present invention.

FIG. 42 is a schematic diagram showing the structure of a height adjustment mechanism and a first adjustment column provided in an embodiment of the present invention.

FIG. 43 is a schematic diagram showing the structure of FIG. 42 with the fixing seat hidden.

FIG. 44 is an exploded view of FIG. 41 .

FIG. 45 shows a front view of the child seat in FIG. 34 .

FIG. 46 shows a cross-sectional view of the child seat in FIG. 45 along line U8-U8.

FIG. 47 shows a cross-sectional view of the child seat in FIG. 45 along line U9-U9.

FIG. 48 is a schematic diagram showing the structure of an adjustment seat provided in an embodiment of the present invention.

FIG. 49 is a exploded view of a rotation adjustment mechanism provided in one embodiment of the present invention.

Figure 50 is a schematic structural diagram of a seat assembly provided in an embodiment of the present invention.

FIG. 51 is a schematic structural diagram of a bracket assembly and a seat adjustment device provided in an embodiment of the present invention.

FIG. 52 shows a cross-sectional view of the child seat of FIG. 45 with one of the locking members removed.

Figure 53 shows a partial cross-sectional view of the child seat along U8-U8 in Figure 45.

FIG. 54 is an enlarged view of point D in FIG. 53 .

FIG. 55 is a schematic diagram showing the structure of the child seat in FIG. 34 from another perspective.

FIG. 56 is an enlarged view of point E in FIG. 55 .

Figure 57 shows a schematic diagram of the structure of the dinner plate in Figure 55 and an enlarged diagram of part of its structure.

Figure 58 is a schematic diagram of the structure of the seat in Figure 55.

FIG. 59 is a schematic structural diagram of a child seat provided by an embodiment of the present invention in a first usage mode.

FIG. 60 is a schematic structural diagram of a child seat provided by an embodiment of the present invention in a second usage mode.

FIG. 61 is a schematic structural diagram of a child seat provided by an embodiment of the present invention in a third usage mode.

FIG. 62 is a schematic structural diagram of a child seat provided by an embodiment of the present invention in a fourth usage mode.

FIG. 63 shows a partial exploded view of the child seat in FIG. 59 .

FIG. 64 shows a rear view of the child seat of FIG. 59 and an enlarged view of the first connecting member, wherein the seat disassembly mechanism is in the unlocked state.

Figure 65 shows a rear view of the child seat in Figure 59 and an enlarged view of the first connecting member, wherein the seat removal mechanism is in a locked state.

FIG. 66 is a schematic diagram showing the structure of a first connecting member provided in an embodiment of the present invention.

Figure 67 shows a right side view of the child seat in Figure 59 and an enlarged view of the second connecting member.

FIG. 68 shows a cross-sectional view of the child seat in FIG. 59 and an enlarged view of the connection between the legs and the leg seats, wherein the folding locking mechanism is in a locked state.

FIG. 69 is an enlarged view of point F in FIG. 68 .

Figure 70 shows a cross-sectional view of the child seat in Figure 59, wherein the folded locking mechanism is in the unlocked state.

FIG. 71 is an enlarged view of point J in FIG. 70 .

FIG. 72 is a schematic diagram showing the structure of the child seat in FIG. 59 from another perspective.

Figure 73 shows a structural schematic diagram of the chair body provided by an embodiment of the present invention when the first seat plate is omitted, as well as an enlarged view of the leg seat and the second seat plate.

FIG. 74 is a schematic diagram showing the structure of the first seat plate provided in an embodiment of the present invention.

Figure 75 shows a cross-sectional view of the chair body provided by an embodiment of the present invention, an enlarged view of the rotation adjustment mechanism, and an enlarged view of the connection between the first seat plate and the second seat plate.

Figure 76 shows a structural schematic diagram of the chair body provided by an embodiment of the present invention when the positioning operating member is omitted, as well as an enlarged diagram of the location for connecting the positioning operating member.

FIG. 77 is a schematic diagram showing the structure of a positioning operating member provided in an embodiment of the present invention.

1000: High chair

100: Seat assembly

13: Backrest

1: Seat

110: First elongated hole

32: Second axis

151: Hole

15: Cover

2111: Chute

211: Connecting arm

212: Side panels

21: Adjustment parts

H2: Second horizontal direction

31: First axis

271:Supporting parts

27: Support seat

V: vertical direction

6: Legs

601: Upper leg

602: Lower leg

603: Legs

7: Folding mechanism

5: Base

200: Bracket assembly

14: Footsteps

2: Height adjustment mechanism

11: Side wall

12: Plate

16: Safety belt

Claims (15)

A height adjustment mechanism is arranged between a support assembly and a seat assembly, the height adjustment mechanism comprises a support seat and two adjustment members, wherein: the support assembly comprises a base, the seat assembly comprises a seat; the support seat and the base are an integral part or the support seat is rotatably mounted on the base, the support seat supports the seat through the two adjustment members; the lower ends of the two adjustment members are connected through two first The shafts are respectively pivoted with the support seat, and the upper ends of the two adjustment members are respectively movably connected with the seat to form two connection points; and the two adjustment members can rotate around the corresponding first shafts to change the positions of the two connection points relative to the support seat or the seat, thereby raising or lowering the seat, wherein the support seat maintains a constant height during the raising or lowering process of the seat. A height adjustment mechanism as described in claim 1, wherein the two adjustment members can rotate in opposite directions around the corresponding first axis to change the positions of the two connection points relative to the support seat or the seat. A height adjustment mechanism as described in claim 1, wherein: the seat has a first height and a second height relative to the support seat, the first height is greater than the second height; when the seat is at the first height, the support seat, the seat, and the connection points between the two adjustment members define a first area; when the seat is at the second height, the support seat, the seat, and the connection points between the two adjustment members define a second area; and the first area is greater than the second area. The height adjustment mechanism as described in claim 1, wherein: the two adjustment members are arranged opposite to each other in the first horizontal direction and separated from each other, the axial direction of each first axis is perpendicular to the first horizontal direction, and when the two adjustment members rotate in opposite directions around the corresponding first axis, the two connection points move in the vertical direction while approaching or moving away from each other in the first horizontal direction; and/or the height adjustment mechanism further includes two first locking members, the two first locking members correspond to the two adjustment members one by one; and each first locking member has a locking position for locking the relative position of the corresponding adjustment member and the seat. The height adjustment mechanism as described in claim 4, wherein: the seat is provided with a plurality of slots, and each of the first locking members is selectively engaged with a corresponding slot among the plurality of slots; and/or the height adjustment mechanism further comprises a first elastic element, and the first elastic element is used to drive each of the first locking members to engage with the seat. The height adjustment mechanism as described in claim 4, wherein: the height adjustment mechanism further includes two slide blocks that are slidably matched with the seat, the two slide blocks are respectively connected to the upper ends of the two adjustment members through a second axis, the second axis is parallel to the first axis; and the two slide blocks correspond to the two first locking members one by one, and each of the first locking members is movably connected to the corresponding slide block. A height adjustment mechanism as described in claim 6, wherein a receiving cavity is provided at the bottom of the seat, the two slide blocks are located in the receiving cavity, each of the second axes extends from the side wall of the receiving cavity and is pivotally connected to the upper end of the corresponding adjustment member; and the side wall of the receiving cavity is provided with a first elongated hole corresponding to the two ends of each of the second axes. The height adjustment mechanism as described in claim 6, wherein: each of the first locking members moves in a vertical direction relative to the corresponding slider to move to a locking position engaged with the seat or a release position disengaged from the seat; and/or the height adjustment mechanism further includes two first driving members, the two first driving members correspond to the two first locking members one by one; each of the first driving members is drivingly connected to the corresponding first locking member, and each of the first driving members drives the corresponding first locking member to move and disengage from the seat when subjected to external force. A height adjustment mechanism as described in claim 8, wherein: one of the first locking member and the corresponding first driving member is provided with a first pin, and the other is provided with a driving slope; the first pin is parallel to the first axis; the driving slope abuts against the first pin; and when each of the first driving members is subjected to the external force, the driving slope abuts against the first pin, driving the first locking member to move. The height adjustment mechanism as described in claim 8 further includes at least one first release member, and the at least one first release member and the two first drive members are operably connected to apply the external force to each of the first drive members. A height adjustment mechanism as described in claim 10, wherein: the height adjustment mechanism includes two first release members, the two first release members correspond to the two first driving members one by one; each first release member is connected to the corresponding first driving member through a first pull member, and the first pull member is set in a protective cover; and/or the height adjustment mechanism also includes a second elastic element, and the second elastic element is used to drive the at least one first release member to reset. The height adjustment mechanism as described in claim 1, wherein the two adjustment members are arranged opposite to each other in a first horizontal direction and separated from each other; each of the adjustment members includes a pair of connecting arms arranged opposite to each other in a second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the upper ends of the pair of connecting arms are movably connected to the seat, the lower ends of the pair of connecting arms are connected to the support seat through a first axis pivot, and the pair of connecting arms are connected through a side plate; at least one of the two opposite surfaces of the pair of connecting arms is provided with a slide groove, and the seat is provided with a boss that slidably cooperates with the slide groove. The height adjustment mechanism as described in claim 1, wherein: the two adjustment members are arranged opposite to each other in the first horizontal direction and separated from each other, and the axial direction of the first axis is perpendicular to the first horizontal direction; the support seat is provided with two support members arranged opposite to each other in the first horizontal direction, and the two support members correspond to the two adjustment members one by one; one of the upper end of the support member and the lower end of the adjustment member is provided with a mounting hole, and the other is provided with the first axis, and the first axis is pivotally connected to the mounting hole; an angle limiting mechanism is provided between at least one pair of corresponding support members and adjustment members, and the angle limiting mechanism is used to limit the rotation angle range of the adjustment member. A height adjustment mechanism as described in claim 13, wherein: the distance between the upper ends of the two support members is greater than the distance between the lower ends thereof; and/or the angle limiting mechanism comprises: a first arcuate groove located on the hole wall of the mounting hole and extending circumferentially; and an elastic telescopic pin mounted on the first shaft and suitable for being inserted into the first arcuate groove. As described in claim 14, the height adjustment mechanism, wherein the hole wall of the mounting hole is provided with a slope, and the slope is used to guide the elastic telescopic pin to be inserted into the first arc groove.

Images