TWI906129B - 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, swivel adjustment mechanism and chair

This invention relates to a height adjustment mechanism, a seat adjustment device, a swivel adjustment mechanism, and a chair.

A high chair consists of a support frame with multiple legs and a seat supported by the frame. It is used to elevate a child, facilitating feeding by caregivers or allowing the child to eat with their caregiver. High chairs provide a fixed seating position for children, but table heights vary between households, or even within the same household, multiple table heights may exist. A high chair with a fixed height cannot accommodate different table heights.

Some high chairs and similar vehicles are typically equipped with a folding leg structure, allowing the high chair to have its legs extended and folded. Current folding leg structures generally include a support base, multiple legs, a slide bar, and multiple linkages. Each leg is hinged to the support base. The slide bar passes through a central hole in the support base to move vertically along the support base. The top end of the slide bar is used to mount the child seat. The bottom end of the slide bar is hinged to one end of each linkage, and the other end of each linkage is hinged to each leg. When the legs are extended, the slide bar moves the child seat downwards relative to the support base. When the outriggers are folded down, the slide bar moves the child seat upwards relative to the support, resulting in the folded vehicle occupying a larger vertical space.

Some bar chairs achieve height adjustment by sliding the seat onto the legs and allowing the seat to slide relative to the legs.

This invention provides a height adjustment mechanism disposed between a support assembly and a seat assembly. The height adjustment mechanism includes a support base and two adjusting members. The support assembly includes a base, and the seat assembly includes a seat. The support base and the base are integral, or the support base is rotatably mounted on the base. The support base supports the seat via the two adjusting members. The lower ends of the two adjusting members are respectively connected to the support base via two first axes, and the upper ends of the two adjusting members are respectively movably connected to the seat to form two connection points. The two adjusting members are capable of rotating around corresponding first axes to change the position of the two connection points relative to the support base or the seat, thereby raising or lowering the seat.

According to one embodiment, the two adjusting members are capable of rotating in opposite directions about corresponding first axes to change the position of the two connection points relative to the support or the seat.

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

According to one embodiment, the two adjusting members are disposed opposite to each other and separated in a first horizontal direction, with the axial direction of each first axis perpendicular to the first horizontal direction. When the two adjusting members rotate about their corresponding first axes in opposite directions, the two connecting points move vertically while simultaneously moving closer to or further apart from each other in the first horizontal direction; and/or, the height adjustment mechanism further includes two first locking members, each corresponding to one of the two adjusting members; and each first locking member 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, each of the first locking members selectively engaging with a corresponding slot among the plurality of slots; and/or, the height adjustment mechanism further includes a first elastic element for driving each of the first locking members to engage with the seat.

According to one embodiment, the height adjustment mechanism further includes two sliders that slidably engage with the seat. The two sliders are respectively hinged to the upper ends of the two adjusting members via a second axis parallel to the first axis; and the two sliders correspond one-to-one with the two first locking members, each of the first locking members being movably connected to its corresponding slider.

According to one embodiment, the seat has a receiving cavity at its bottom, the two sliders are located in the receiving cavity, each of the second shafts extends from the side wall of the receiving cavity and is hinged to the upper end of a corresponding adjusting member; and the side wall of the receiving cavity has a first elongated hole corresponding to both ends of each of the second shafts.

According to one embodiment, each of the first locking members moves vertically relative to the corresponding slider to a locked position engaging with the seat or an unlocked position disengaging from the seat; and/or, the height adjustment mechanism further includes two first drives, each corresponding to one of the two first locking members; each first drive is drivenly connected to a corresponding first locking member, and each first drive, when subjected to an external force, drives the corresponding first locking member to move and disengage from the seat.

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 ramp; the first pin is parallel to the first axis; the driving ramp abuts against the first pin; and when each of the first driving members is subjected to the external force, the driving ramp 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 operably connected to the two first actuators to apply the external force to each of the first actuators.

According to one embodiment, the height adjustment mechanism includes two first release elements, each corresponding to one of the two first drives; each first release element and its corresponding first drive are connected via a first traction member, the first traction member being sleeved in a protective sleeve; and/or, the height adjustment mechanism further includes a second elastic element for driving the at least one first release element to reset.

According to one embodiment, the two adjusting members are disposed opposite to each other and separated in a first horizontal direction; each adjusting member includes a pair of connecting arms disposed opposite to each other in a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction; the upper ends of the pair of connecting arms are movably connected to the seat, and the lower ends of the pair of connecting arms are hinged to the support seat via a first shaft; the pair of connecting arms are connected via side plates; at least one of the two opposite surfaces of the pair of connecting arms is provided with a groove, and the seat is provided with a protrusion that slidably engages with the groove.

According to one embodiment, the two adjusting members are arranged opposite to each other and separated in a first horizontal direction, and the axis of the first shaft is perpendicular to the first horizontal direction; the support base is provided with two supporting members arranged opposite to each other in the first horizontal direction, the two supporting members corresponding one-to-one with the two adjusting members; 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 shaft, the first shaft being hinged to the mounting hole; an angle limiting mechanism is provided between at least one pair of corresponding supporting members and adjusting members, the angle limiting mechanism being used to limit the rotation angle range of the adjusting member.

According to one embodiment, the upper distance between the two supports is greater than the lower distance between them; and/or, the angle limiting mechanism includes: a first arcuate groove located on the wall of the mounting hole and extending circumferentially; and an elastic telescopic pin mounted on the first shaft and adapted to be inserted into the first arcuate groove.

According to one embodiment, the wall of the mounting hole is provided with a bevel, the bevel serving to guide the elastic telescopic pin into the first arc-shaped groove.

In another aspect, this invention provides a seat adjustment device disposed between a support assembly and a seat assembly. 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 support assembly and engaging with the first adjustment column; and a height adjustment mechanism disposed between the first and second adjustment columns, the height adjustment mechanism being switchable between a locked state and an unlocked state; wherein, when the height adjustment mechanism is in the locked state, the first adjustment column is fixed at a certain height relative to the second adjustment column; and when the height adjustment mechanism is in the unlocked state, the first adjustment column is movable relative to the second adjustment column.

According to one embodiment, the height adjustment mechanism includes: a plurality of adjustment holes disposed on one of the first adjustment post and the second adjustment post; and a height locking member movably disposed on the other of the first adjustment post and the second adjustment post, the height locking member being switchable between a first locked position and a first unlocked position; wherein, when the height locking member is in the first locked position, the height locking member engages with at least one of the plurality of adjustment holes, and when the height locking member is in the first unlocked position, the height locking member disengages from the at least one adjustment hole.

According to one embodiment, the height adjustment mechanism further includes a height drive member. One of the height locking member and the height drive member is provided with a first drive groove, and the other of the height locking member and the height drive member is provided with a first drive pin. The extending direction of the first drive groove is inclined relative to the moving direction of the height locking member. The first drive pin is inserted into the first drive groove and is movable along the first drive groove. The height drive member can drive the height locking member to move between a first locked position and a first unlocked position.

According to one embodiment, the plurality of adjusting holes are disposed on the second adjusting post, and the height locking member is disposed on the first adjusting post; the height adjusting mechanism further includes: a fixed base connected to the first adjusting post and provided with a guide groove, the extending direction of the guide groove being perpendicular to the axial direction of the first adjusting post; the first driving pin is inserted into the guide groove and is movable along the guide groove.

According to one embodiment, the height adjustment mechanism further includes a first reset member adapted to bias the height drive member to move the height locking member to the first locked position; and/or, the height adjustment mechanism further includes: a height operating member capable of switching between a first position and a second position; a traction member, one end of which is connected to the height drive member, and the other end of which is connected to the height operating member; wherein the height operating member can be operated to move the height drive member via the traction member to drive the height locking member from the first locked position to the first unlocked position.

According to one embodiment, the height adjustment mechanism further includes a second reset member adapted to bias the height operating member to move towards the first position; and/or, the seat adjustment device further includes a mounting base through which the first adjusting post is connected to the seat; the mounting base includes: an upper cover connected to the bottom of the seat and connected to the first adjusting post; and a lower cover that, together with the upper cover, surrounds a first receiving cavity, in which at least a portion of the height operating member is received.

According to one embodiment, the mounting base further includes a connecting pipe disposed around the outer periphery of the first adjusting post and forming a second receiving cavity with the first adjusting post. The second receiving cavity communicates with the first receiving cavity, and at least a portion of the traction member is received within the second receiving cavity.

According to one embodiment, the height adjustment mechanism further includes a fixed base disposed at one end of the first adjustment column away from the seat assembly, and at least a portion of the fixed base is received in a second receiving cavity. The height drive and the height locking member are received within the second receiving cavity and are movably connected to the fixed base, respectively.

According to one embodiment, the seat adjustment device further includes an anti-disengagement mechanism, the anti-disengagement mechanism comprising: an elastic finger disposed on the connecting pipe, the elastic finger having a hook portion protruding away from the second receiving cavity; and an engaging groove disposed on the bracket assembly, the engaging groove extending parallel to the axial direction of the second adjusting post; wherein the hook portion is movable along the engaging groove, and the end of the engaging groove restricts the movement stroke of the hook portion.

According to one embodiment, the support assembly further includes an adjustment seat connected to the base; the adjustment seat is at least partially disposed around and connected to the second adjustment post, and the engaging groove is disposed in the adjustment seat.

According to one embodiment, the support assembly further includes an adjustment seat rotatably connected to the base; a first receiving groove is defined between the adjustment seat and the second adjustment post, the connecting pipe slidably engages with the first receiving groove, and the connecting pipe is not rotatable relative to the adjustment seat.

According to one embodiment, the first adjusting post has a hollow inner cavity, and the second adjusting post is inserted into and movable along the hollow inner cavity.

According to one embodiment, a protrusion is provided on the outer surface of the second adjusting column, the protrusion abutting against and slidingly engaging with the cavity wall of the hollow inner cavity of the first adjusting column.

According to one embodiment, a fixing seat is provided at the end of the first adjusting column away from the seat assembly. The fixing seat has a groove adapted to engage with the protrusion and allowing the protrusion to pass through.

In another aspect, the invention provides a rotation adjustment mechanism disposed between a rotatable seat assembly and a support assembly to operatively lock the circumferential position of the seat assembly relative to the support assembly.

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

According to one embodiment, the seat assembly is connected to the support assembly via an adjusting seat; a rotation adjustment mechanism is operably disposed on the support assembly, the rotation adjustment mechanism having an unlocked state and a locked state. When the rotation adjustment mechanism is in the unlocked state, the adjusting seat can rotate relative to the support assembly or the seat assembly to adjust the circumferential relative position of the seat assembly and the support assembly; when the rotation adjustment mechanism is in the locked state, the adjusting seat cannot rotate relative to the support assembly and the seat assembly, thereby locking the circumferential relative position of the seat assembly and the support assembly.

According to one embodiment, the seat assembly is connected to a first adjusting column, and the adjusting seat is connected to a second adjusting column, with the second adjusting column engaging with the first adjusting column. A height adjustment mechanism is provided between the first and second adjusting columns, and this mechanism can switch between a locked and an unlocked state. When the height adjustment mechanism is locked, the first adjusting column is fixed at a certain height relative to the second adjusting column; when the height adjustment mechanism is unlocked, the first adjusting column can move relative to the second adjusting column.

According to one embodiment, the rotation adjustment mechanism includes: a plurality of slots disposed in one of the bracket assembly and the adjustment seat; and a rotation locking member disposed in the other of the bracket assembly and the adjustment seat, the rotation locking member being switchable between a second locked position and a second unlocked position; wherein, when the rotation locking member is in the second locked position, the rotation locking member engages with at least one of the plurality of slots, preventing the adjustment seat from rotating relative to the bracket assembly; when the rotation locking member is in the second unlocked position, the rotation locking member disengages from the plurality of slots, allowing the adjustment seat to rotate relative to the bracket assembly.

According to one embodiment, the rotary locking member is disposed on the adjusting base, the adjusting base having a second through hole, and the rotary locking member is movably inserted through the second through hole.

According to one embodiment, the rotation adjustment mechanism further includes a rotation operating member mounted to the adjustment seat, the rotation operating member being drivenly connected to the rotation locking member to drive the rotation locking member to switch between a second locked position and a second unlocked position.

According to one embodiment, the rotary locking member has a first driving surface, and the rotary operating member has a second driving surface, the second driving surface abutting against the first driving surface. The rotary operating member can be operated to push the first driving surface through the second driving surface, thereby driving the rotary locking member to switch to a second unlocking position; or, the rotary locking member is provided with a insertion groove, the sidewall of the insertion groove forming the first driving surface, the rotary operating member including a insertion portion, the sidewall of the insertion portion forming a second driving surface, the second driving surface being inclined relative to the extending direction of the rotary locking member, the insertion portion engaging with the insertion groove, and the second driving surface abutting against the first driving surface.

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

According to one embodiment, the rotation adjustment mechanism further includes: a rotation reset member adapted to bias the rotation locking member to move the rotation locking member to the second locking position.

According to one embodiment, the rotary locking members are arranged in pairs, and the rotary reset member is connected to or abuts between the two rotary locking members to simultaneously bias both rotary locking members.

According to one embodiment, the support assembly includes leg seats connected to the plurality of legs, and the seat assembly is mounted on a seat plate, the seat plate being rotatably connected to the leg seats. A rotation adjustment mechanism is disposed between the leg seats and the seat plate; when the rotation adjustment mechanism is in an unlocked state, the seat plate can rotate relative to the leg seats; when the rotation adjustment mechanism is in a locked state, the seat plate cannot rotate relative to the leg seats.

According to one embodiment, the rotation adjustment mechanism includes: a positioning member having a third locked position and a third unlocked position; the support 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 the locked state, the positioning member is in the third locked 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 the unlocked state, the positioning member is in the third unlocked 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, the positioning portion having a non-circular rotationally symmetrical cross-section; and/or, the rotation adjustment mechanism further includes a positioning reset member adapted to bias the positioning member toward the third locking position, the positioning reset member abutting or connected between the positioning member and the support leg seat.

According to one embodiment, the rotation adjustment mechanism further includes a positioning actuating element, which is drivenly connected to the positioning member and operably disposed on the support leg seat. The positioning actuating element is operable to drive the positioning member to move toward the third unlocked position.

According to one embodiment, the positioning actuating element is disposed on the side of the support leg seat opposite to the first positioning groove, and the positioning actuating element is connected to the positioning element by a fastener.

According to one embodiment, the seat plate is provided with a first receiving groove, and the support leg seat is provided with a rotatable connecting portion. At least a portion of the rotatable connecting portion is received in the first receiving groove and abuts against the side wall of the first receiving groove, allowing the seat plate to rotate relative to the support leg seat about a rotation axis.

According to one embodiment, the seat plate includes a first seat plate and a second seat plate. The first seat plate is provided with a first receiving groove, and the second seat plate is disposed at the opening of the first receiving groove. An opening is formed between the second seat plate and the first seat plate. At least a portion of the rotating connecting part extends into the opening and engages with 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, which together form a first receiving groove. A connecting rod is inserted into the first receiving groove, and a portion of the connecting rod extending from the first receiving groove is connected to the backrest. And/or, the support assembly further includes a roller rotatably disposed on the support leg seat. The roller has a first inclined surface, and the seat plate has a second inclined surface surrounding a rotation axis of the seat plate, the second inclined surface rollingly contacting the first inclined surface.

According to one embodiment, the positioning actuating member is rotatably disposed on the support leg seat, the support leg seat being provided with a positioning rib, and the positioning actuating member being provided with a retaining rib, the retaining rib abutting against the positioning rib to hold the positioning member in the third unlocked position.

In another aspect, the present invention provides a chair, including the aforementioned height adjustment mechanism and/or the aforementioned seat adjustment device and/or the aforementioned swivel adjustment mechanism.

In another aspect, the invention provides a chair comprising a support assembly including a plurality of legs and a folding mechanism for opening or closing the plurality of legs.

According to one embodiment, the folding mechanism includes: an adjusting base; a plurality of connectors mounted on the adjusting base; and at least one second locking member; wherein the adjusting base is slidably connected to the plurality of legs via the plurality of connectors; and 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 adjusting base and the at least one leg.

According to one embodiment, the at least one of the outriggers is provided with two or more locking slots, which are spaced apart along the length of the at least one outrigger 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 adjusting seat and operatively 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 slide rail, and each of the connecting members is slidably connected to the slide rail on the corresponding leg through its slot.

According to one embodiment, the support assembly includes a base having a slide rail extending in a vertical direction; the plurality of support legs are respectively connected to the base; the folding mechanism includes: a first sliding member slidably engaging with the slide rail; and a plurality of linkages connected between the first sliding member and the plurality of support legs; when the first sliding member moves along the slide rail, the plurality of linkages drive the plurality of support legs to simultaneously unfold or fold.

According to one embodiment, the folding mechanism further includes: a stabilizer connected to the first sliding member via at least one connector to allow the stabilizer to move with the first sliding member in the vertical direction; and the stabilizer having a rotation axis parallel to the vertical direction; at least one first motion conversion mechanism disposed between the stabilizer and the base; each of the first motion conversion mechanisms drives the stabilizer to rotate relative to the first sliding member about the rotation axis when the stabilizer moves in the vertical direction.

According to one embodiment, one of the stabilizer and the first slider 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 disposed in 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 engaging hooks extending from the stabilizer or the first slider, each of the engaging hooks extending in the vertical direction.

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

According to one embodiment, the slide 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 slide 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 disposed between the stabilizer and the column portion.

According to one embodiment, the folding mechanism further includes: at least one locking member, the at least one locking member being mounted to the base and used to lock the first slider to restrict movement of the first slider relative to the track.

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

According to one embodiment, the first slider includes at least one locking portion, each locking portion including a locking recess; each locking member includes a plurality of locking protrusions extending in a transverse direction, the plurality of locking protrusions being arranged at intervals in the vertical direction; the locking recesses selectively engage with the plurality of locking protrusions to lock the first slider at different positions on the slide rail.

According to one embodiment, the first slider includes at least one locking portion, each locking portion including a plurality of locking recesses arranged at intervals in the vertical direction; each locking member includes a locking protrusion extending in the transverse direction; the plurality of locking recesses selectively engage with the locking protrusions to lock the first slider at different positions on the slide rail.

According to one embodiment, each of the releasing members is mounted on the base and is movable in the vertical direction; a second motion conversion mechanism is provided between each of the releasing members and each of the locking members, the second motion conversion mechanism being used to convert the vertical movement of each of the releasing members into horizontal movement of each of the locking members, 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 drive groove disposed on one of the releasing member and the locking member; and a second drive pin disposed on the other of the releasing member and the locking member and slidably engaging with the second drive groove.

According to one embodiment, the base includes a receiving cavity, in which the slide, the first sliding member, and the stabilizing member are located. The base is provided with a plurality of first through slots communicating with the receiving cavity. The first ends of the plurality of linkages pass through the plurality of first through slots and are hinged to the first sliding member. And/or, each of the plurality of legs is respectively equipped with a cover, and each cover is provided with a second through slot. The second ends of each linkage pass through the second through slots and are hinged to each of the legs.

According to one embodiment, the support assembly is mounted on the seat plate, and the plurality of support legs are configured to pivot relative to the seat plate to switch the chair between a high position and a low position. The support assembly further includes a footrest movably connected to the plurality of support legs. The footrest is movable between a first position and a second position, causing the plurality of support legs to pivot. When the footrest is in the first position, the plurality of support legs are extended, placing the chair in the low position; when the footrest is in the second position, the plurality of support legs are folded, placing the chair in the high position.

According to one embodiment, each of the outriggers is provided with a second sliding member, the second sliding member being hinged to the foot pedal, such that the foot pedal can slide together with the second sliding member between the first position and the second position.

According to one embodiment, the folding mechanism includes: a locking member movably disposed on at least one of the plurality of legs, the locking member being switchable between a fourth locked position and a fourth unlocked position; and a locking hole disposed on the second sliding member; when the folding mechanism is in the locked state, the locking member is in the fourth locked position, the locking member engaging with the locking hole to lock the second sliding member relative to the legs; when the folding mechanism is in the unlocked state, the locking member is in the fourth unlocked position, the locking member disengaging from the locking hole.

According to one embodiment, the folding mechanism further includes: a drive member, one of which, and the engaging member, is provided with a drive groove; the other of which, and the drive member, is provided with a drive pin; the extension direction of the drive groove is inclined relative to the movement direction of the engaging member; the drive pin is inserted into the drive groove and is movable along the drive groove to drive the engaging member to move between the fourth locked position and the fourth unlocked position.

According to one embodiment, the folding mechanism further includes: a fixing seat, fixedly disposed on at least one of the plurality of legs; the fixing seat having a guide groove extending parallel to the direction of movement of the drive member, the drive pin engaging with the guide groove and movable along the guide groove; and/or, a retraction reset member adapted to bias the drive member such that the drive member drives the engaging member to move toward the fourth locking position.

According to one embodiment, the folding mechanism further includes: a folding operation member movably disposed on the bracket assembly; and a traction member, one end of which is connected to the drive member, and the other end of which is connected to the folding operation member; wherein the folding operation member can be operated to move the drive member via the traction member, thereby driving the engaging member to move from the fourth locking position to the fourth unlocking position.

According to one embodiment, the plurality of outriggers have hollow cavities, and at least a portion of the folding mechanism is accommodated within the hollow cavities; and/or, at least one of the plurality of outriggers is provided with a first limiting member adapted to abut against a second sliding member to restrict upward sliding of the foot pedal from the first position; and/or, at least one of the plurality of outriggers is provided with a second limiting member adapted to abut against the second sliding member to restrict downward sliding of the foot pedal 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 being connected to the seat plate, and the other end of the first leg being detachably connected to the second leg.

According to one embodiment, the chair further includes a seat removal mechanism, through which the seat assembly is detachably connected to a mounting base. The seat removal mechanism includes: an engaging hole disposed on the mounting base; and a disassembly locking member disposed on the seat assembly. The disassembly locking member has a hook portion and is movable between a third position and a fourth position. When the disassembly locking member is in the third position, the hook portion engages with the engaging hole, fixing the seat assembly relative to the mounting base. When the disassembly locking member is in the fourth position, the hook portion disengages from the engaging hole, allowing the seat assembly to detach from the mounting base.

According to one embodiment, the mounting base is provided with a connecting groove, and the engaging hole is located on the side wall of the connecting groove and communicates with the connecting groove. The disassembly locking member is inserted into the connecting groove, and the disassembly locking member can move in a direction parallel to the bottom wall of the connecting groove to move between the third position and the fourth position.

According to one embodiment, the seat removal mechanism further includes: an engaging recess disposed on the mounting base; a release member operably disposed on the seat assembly, the release member having an engaging protrusion, the release member being switchable between a sixth release position and a sixth locking position; wherein, when the release member is in the sixth locking position, the engaging protrusion engages with the engaging recess to restrict the release member to the third position; when the release member is in the sixth release position, the engaging protrusion disengages from the engaging recess, allowing the release member to switch between the third position and the fourth position; and a release repositioning member adapted to bias the release member to move the 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 release mechanism can pass through the receiving hole and engage with the engaging recess. An operating recess is provided at one end of the release mechanism away from the engaging protrusion, 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, and the disassembly and release member further has an abutment portion, at least a portion of which is received in the second receiving groove. The disassembly and repositioning member is received in the second receiving groove, and both ends of the disassembly and repositioning member abut against the groove wall of the second receiving groove and the abutment portion, respectively.

According to one embodiment, the support assembly is mounted on a seat plate, the seat plate being provided with a backrest; the seat assembly includes a seat and a backrest portion, the backrest portion being provided with a first connecting member, and the seat assembly being 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 disposed on the seat assembly and can switch between a fifth locked position and a fifth unlocked position; wherein, when the first connecting member is in the fifth unlocked position, the first connecting member can move along the extending direction of the connecting hole; the first connecting member can be rotated to the fifth locked position, and when the first connecting member is in the fifth locked 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 is provided with a connecting protrusion capable of engaging with the connecting hole, and the first connecting member is rotatably connected to the connecting protrusion; and/or, the bottom of the seat assembly is provided with a second connecting member, the second connecting member extending downward and forming a connecting groove, the second connecting member being configured to engage with the seat plate through the connecting groove.

According to one embodiment, the backrest has a positioning protrusion on its back side, and the first connector has a corresponding positioning recess. When the first connector is in the fifth locking position, the positioning protrusion engages with the positioning recess; and/or, the side of the backrest facing away from the seat assembly has a recess, and when the first connector is in the fifth locking position, the first connector abuts against the bottom wall of the recess.

According to one embodiment, the seat assembly includes a seat and a plate. The plate is connected to the seat via a plate adjustment mechanism. The plate adjustment mechanism includes: a plurality of position slots disposed on the side of the seat; and a plate release mechanism having an engaging portion. The plate release mechanism is movably disposed on the plate and has a seventh locking position and a seventh unlocking position. When the plate release mechanism is in the seventh locking position, the engaging portion engages with at least one of the plurality of position slots to fix the plate to the seat. When the plate release mechanism is in the seventh unlocking position, the engaging portion disengages from the plurality of position slots, allowing the plate to be separated from the seat or to move relative to the seat.

According to one embodiment, the plate has a load-bearing front and a back opposite the front, the plate release mechanism is disposed on the back, and the plate release mechanism also has a second operating portion protruding from the engaging portion and extending away from the back; and/or, the plate adjustment mechanism further includes an adjustment reset member disposed between the plate release mechanism and the plate, the adjustment reset member being adapted to bias the plate release mechanism to move the plate release mechanism toward the seventh locking position.

According to one embodiment, one of the plate and the plate unlocking device is provided with a slot, and the other of the plate and the plate unlocking device is provided with a connecting pin, the connecting pin engaging with the slot; and/or, the plate is provided with a connecting plate, the connecting plate being arranged along the front-to-back direction of the chair, the connecting plate having a hole through which the engaging portion can engage or disengage with the plurality of position slots; and/or, the plate is further provided with a limiting portion, the limiting portion abutting against the side of the seat to limit the travel of the plate.

1000: High Chair

2: Height Adjustment Mechanism

7: Collection and discounting institutions

100: Seat assembly

200: Bracket assembly

1: Seats

12: Dinner Plate

13: Backrest

14: Footsteps

16: Safety Belt

6: Support Legs

5: Base

27: Support base

H1: First horizontal direction

21: Adjustment component

31: First Axis

P1, P2, P3, P4: Connection points

V: Vertical direction

G1: First Altitude

G2: Second Altitude

S1: First area

S2: Second area

275: Third locking component

2751: Operations Department

270: Longitudinal hole

50: Positioning hole

44: Fourth elastic element

271: Support component

H2: Second horizontal direction

211: Connecting Arm

2111: Slide

102: Convex column

212:Side panel

2710: Mounting Hole

28: Angle Limiting Mechanism

281: First arc-shaped groove

282: Elastic expansion pin

2712: Incline

22: First locking element

101: Card Slot

11: Side wall

23: Slide

32: Second Axis

2301, 220, 2110, 150: Through holes

230: Cavity

15: Cover

151, 105, 240, 50201, 5027, 124: Hole

10: Reception chamber

110: First elongated hole

41: First elastic element

24: First Drive

F1: External Force

221: First Sale

2302, 250: Elongated holes

241: Driving Inclined Surface

25: First unlocking device

152: Bump

252: Operations Department

261: First tractor

242, 251: Installation Department

262: Protective Cover

42: Second elastic element

71: Adjustable Seat

72: Connectors

33: Third Axis

721: Groove

61: Sliding rail

62: Lock slot

73: Second locking element

L: Length direction

731: Second elongated hole

720: Groove

74: Second unlocking device

75: Second traction component

43: Third elastic element

711: Upper Shell

712: Lower shell

70: Internal cavity

740: Second arc-shaped groove

M: Center

7521: Second Selling

741: Operations Department

T: Torque

751: Linkage

752: Second drive unit

34: Fourth Axis

35: Fifth Axis

51: Enhanced tablets

511: Hub

601: Upper support leg

602: Lower support leg

603: Support leg

610: Hook and Hanging Section

8: Storage Bags

300: Bracket Assembly

761: First Slider

762: Linkage

100a: Bottom Turntable

501: Upper Shell

503: Intermediate Shell

502: Lower shell

5001: Reception Cavity

5010, 5030, 7630, 7611: Center Hole

50311: Column section

5031: Slide

5032: Mounting Socket

50320: Slint hole

625: Pivot Axis

5021: First slot

551, 552: Pivot Axis

7610: Slot

7613: concave part

623: Firmware Enhancement

622: Cover

6220: Second slot

763: Stable component

766: The First Sports Transformation Institution

405: Connector

X-X: Rotation axis

7631: Arc-shaped hole

7612: Through hole

7660: First Drive Inclined Slot

7661: First Drive Sales

7632: Mounting Hole

767: Locking component

H: Lateral direction

7614: Locking Unit

76140: Locking recess

7671: Locking Protrusion

768: Unlocking Device

769: Elastic component

7680: Storage Tank

5025: Slide

7662: Second motion conversion mechanism

76620: Second drive chute

76621: Second Drive Sales

7681: Operations Department

400: Seat adjustment device

5211: Receiving Hole

431: First Adjustment Column

432: Second Adjustment Column

433: Height Adjustment Mechanism

435: Mounting Socket

436: Adjust Seat

437: Rotation Adjustment Mechanism

4351: Top Cover

4352: Lower cover

4353: Connecting to take over

4354: First Reception Chamber

4337: Height control component

4355: Second Reception Chamber

4331: Height Locking Component

4337: Height control component

4311: Hollow inner cavity

4332: Height drive component

4333: Fixed base

4334: First reset component

4336: Adjustment Hole

43331: Part One

43332: Part Two

43337: Earplate

43336: First Reception Slot

43338: First convex pillar

43333: Guide slot

4322: Protrusion

4323: Adjustment tube

4321: Pipe plug

4322: Protrusion

43335: Groove

43334: Socket

4335: First Drive Sales

43311: First card closing end

4312: First Exit Hole

43339: Second Exit Hole

43321: First Drive Slot

D1, D2, D3, D4, D5, D6, D7, D8, D9, D10: Direction of movement

43322: First reset component receiving slot

4337: Height control component

4338: Pulling component

4339: Second reset component

43371: First Operations Department

43372: First Connector

4356: First perforation

43373: Second reset component receiving slot

438: Anti-exit mechanism

4381: Elastic Fingers

4382: Snap-fit slot

4361: First receiving slot

43811: Hook Body

4371: Rotary locking element

4372: Rotation control component

4373: Rotation reset component

4374: Slot

43711: Second card connection end

4362: Second receiving slot

4363: Second perforation

R-R: Rotary shaft

4364: Connecting hole

43723: Connecting Post

43721: Second drive surface

43722: Connector

43713: Connector slot

43712: First Drive Surface

43714: Third reset component receiving slot

500: Seat Removal Mechanism

111: Seat section

112: Backrest section

113: Side

541: Disassembly of the locking component

542: Disassemble the release mechanism

543: Disassembly of the reset component

544: Engagement Hole

545: Engagement recess

4358: Connecting slot

5411: Hook section

5412: Matrix

5421: Engaging protrusion

1014: Accommodation aperture

5422: Operation recess

1113: Stopper

1031: Stop section

1032: Support Unit

10311: Mounting Slot

1015: Second Reception Slot

5423:Butt part

5424: Second convex pillar

12A: Plate Adjustment Mechanism

115: Handrail section

1251: Plate Unlock Device

1252: Adjustment and reset component

1253: Gear slot

121: Front

122: Back view

123: Connector Board

125: Limiting part

126: Reinforced Ribs

12511: Kahebu

12512: Second Operations Department

1513: Groove

127: Connecting pin

2000: Chair Body

1131: Stop section

1132: Support Unit

822: Seat Plate

825: Backrest

800: Seat Removal Mechanism

831: First Connector

832: Second Connector

Q1: Vertical direction

Q2: Horizontal direction

8251: Connecting hole

8252: Front

8253: Back side

N: Longitudinal direction

104: Connecting Protrusion

8254: Positioning convexity

8311: Positioning recess

8255: concave part

8321: Connecting slot

6212: Support Legs

6213: Foot pedal component

6214: Second Slider

6214: Second Slider

62131: Reinforcing component

6215: First limiting component

6216: Second limiting component

62113: Connecting joints

62114: Installer

62122: Joint receiving slot

62123: Limiting hole

621141: Limiting convex part

62115: Hollow inner cavity

923: Collection and Discount Agency

9231: Card Assembly

9232: Driver

9233: Fixed base

9234: Retraction and repositioning component

9235: Closing/Retracting Operation Component

9236: Pulling component

92331: Guide slot

92332: First receiving slot

9237: Drive Selling

9239: Drive bay

M1, M2: Direction of movement

92311: Card-connected end

62116: Through hole

9238: Engagement Hole

92333: Second receiving slot

92321: convex platform

8221: First Seat

8222: Second seat plate

82211: First Reception Slot

826: Connecting rod

82212: First sidewall

82213: Second side wall

62124: Rotating Connector

82223: Open

924: Rotation Adjustment Mechanism

9241: Positioning component

9242: Positioning and Resetting Component

9243: Positioning manipulator

9244: First positioning slot

9245: Second positioning slot

92411: Positioning Department

9249: Fasteners

92412: Positioning Connector

92413: Third Reception Slot

92441: Convex column

62121: Positioning Rib

92431: Maintain Ribs

62121a: Abutment end

62121b: Inclined plane

62121c: Limiting end

6217: Roller

62171: First inclined plane

82214:Second slope

Figure 1 shows a perspective view of a high chair provided in an embodiment of the present invention, wherein the high chair incorporates a height adjustment mechanism and a folding mechanism.

Figure 2 shows a partial front view of the high chair in Figure 1, where the height adjustment mechanism supports the seat at a certain height.

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

Figure 4 shows a rear perspective view of the high chair in Figure 1.

Figure 5 shows a cross-sectional view along line U1-U1 of the high chair in Figure 2.

Figure 6 shows a cross-sectional view along line U2-U2 of the high chair in Figure 5.

Figure 7 shows a three-dimensional view of the adjustment mechanism of the high chair in Figure 1.

Figure 8 shows a three-dimensional view of the support base of the high chair in Figure 1.

Figure 9 shows a bottom-view perspective of the seat of the high chair in Figure 1.

Figure 10 shows a three-dimensional view of the first locking component and the first driving component of the high chair in Figure 1.

Figure 11 shows a three-dimensional view of some components of the height adjustment mechanism of the high chair in Figure 1.

Figure 12 shows a three-dimensional view of the high chair in Figure 1 from below.

Figure 13 shows a partial exploded view of the high chair in Figure 1 from one direction.

Figure 14 shows a partial exploded view of the high chair in Figure 1 from another direction.

Figure 15 shows a three-dimensional view of the high chair in Figure 1, where a folding mechanism supports the base at a certain height.

Figure 16 shows a three-dimensional view of the high chair in Figure 1, where a folding mechanism supports the base at another height.

Figure 17 shows a three-dimensional view of the high chair in Figure 16 from below.

Figure 18 shows a U3-U3 sectional view of the support assembly of the high chair in Figure 16, with the support assembly in the open position.

Figure 19 shows a cross-sectional view of the support assembly in Figure 18 in its folded state.

Figure 20 shows a top perspective view of some parts of the support assembly of the high chair in Figure 1, wherein the second locking member engages with the corresponding locking groove.

Figure 21 shows a top perspective view of some parts of the support assembly of the high chair in Figure 1, wherein the second locking member is disengaged from and engaged with the corresponding locking groove.

Figure 22 shows a three-dimensional view of the high chair in Figure 1, with the lower legs of each support leg removed.

Figure 23 shows a perspective view of a vehicle provided in an embodiment of the present invention, the vehicle having a folding leg structure in the deployed state.

Figure 24 shows a U4-U4 sectional view of the folded-back structure of the legs in Figure 23.

Figure 25 shows another perspective view of the vehicle of Figure 23, with the outriggers folded down in the folded-down state.

Figure 26 shows a U5-U5 sectional view of the folded-back structure of the legs in Figure 25.

Figure 27 shows an exploded view of the folded-down leg structure in Figure 23.

Figure 28 shows a top view of the folded-back structure of the legs in Figure 23; the base is omitted in the figure.

Figure 29 shows a side view of the folded-back structure of the legs in Figure 23.

Figure 30 shows a sectional view of U6-U6 in Figure 29, with the stabilizer omitted.

Figure 31 shows a three-dimensional view of the locking, releasing, and elastic components of Figure 27 assembled together.

Figure 32 shows another three-dimensional view of the locking, releasing, and elastic components of Figure 27 assembled together.

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

Figure 34 shows a schematic diagram of the child seat in Figure 33 after it has been adjusted to a higher position.

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

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

Figure 37 shows an enlarged view of point A in Figure 36.

Figure 38 shows an enlarged view of point B in Figure 37.

Figure 39 shows a schematic diagram of the structure of the support assembly and the second adjusting column provided in one embodiment of the present invention.

Figure 40 shows an enlarged view of point C in Figure 39.

Figure 41 is a schematic diagram illustrating the structure of the mounting base provided in one embodiment of the present invention.

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

Figure 43 shows a schematic diagram of the structure in Figure 42 with the mounting bracket hidden.

Figure 44 shows an exploded view of Figure 41.

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

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

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

Figure 48 shows a schematic diagram of the structure of the adjustment base provided in one embodiment of the present invention.

Figure 49 shows an exploded view of the rotation adjustment mechanism provided in an embodiment of the present invention.

Figure 50 shows a schematic diagram of the structure of a seat assembly provided in one embodiment of the present invention.

Figure 51 is a schematic diagram illustrating the structure of the support assembly and seat adjustment device provided in an embodiment of the present invention.

Figure 52 shows a cross-sectional view of the child seat in Figure 45 at one of the disassembled locking components.

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

Figure 54 shows an enlarged view of point D in Figure 53.

Figure 55 shows a structural schematic of the child seat in Figure 34 from another viewpoint.

Figure 56 shows an enlarged view of point E in Figure 55.

Figure 57 shows a schematic diagram of the structure of the plate in Figure 55, and an enlarged view of some of its components.

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

Figure 59 illustrates a schematic diagram of the child seat provided in an embodiment of the present invention in its first usage mode.

Figure 60 illustrates a schematic diagram of the child seat provided in an embodiment of the present invention in its second usage mode.

Figure 61 is a schematic diagram illustrating the structure of a child seat provided in an embodiment of the present invention in its third usage mode.

Figure 62 illustrates a schematic diagram of the child seat provided in an embodiment of the present invention in its fourth usage mode.

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

Figure 64 shows a rear view of the child seat in Figure 59 and an enlarged view of the first connecting part, with the seat removal mechanism 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 part, with the seat removal mechanism in the locked position.

Figure 66 is a schematic diagram illustrating the structure of the first connector 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 connector.

Figure 68 shows a cross-sectional view of the child seat in Figure 59 and an enlarged view of the connection between the leg and the leg seat, with the folding and locking mechanism in the locked state.

Figure 69 shows an enlarged view of point F in Figure 68.

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

Figure 71 shows an enlarged view of point J in Figure 70.

Figure 72 shows a structural schematic of the child seat in Figure 59 from another viewpoint.

Figure 73 shows a schematic diagram of the chair body provided in an embodiment of the present invention with the first seat board omitted, as well as enlarged views of the leg support and the second seat board.

Figure 74 shows a schematic diagram of the structure of the first base plate provided in an embodiment of the present invention.

Figure 75 shows a cross-sectional view of the chair body provided in 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 illustrates a schematic diagram of the chair body provided in an embodiment of the present invention with the positioning operation member omitted, and an enlarged view of the part used to connect the positioning operation member.

Figure 77 is a schematic diagram illustrating the structure of a positioning actuator provided in an embodiment of the present invention.

First Implementation Example

Referring to Figure 1, a perspective view of a chair (more specifically, a high chair 1000) provided in an embodiment of the present invention is shown. It utilizes a height adjustment mechanism 2 and a folding mechanism 7 provided in an embodiment of the present invention. The structures of the height adjustment mechanism 2 and the folding mechanism 7 will be described in conjunction with the structure of the high chair 1000 described below.

Referring to Figure 1, the high chair 1000 includes a seat assembly 100 and a support assembly 200, with the seat assembly 100 attached to the support assembly 200. The seat assembly 100 provides a seating position for a child, and the support assembly 200 supports 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, allowing the high chair 1000 to be adjusted to accommodate different table heights in the home.

Referring to Figure 1, the 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 optionally equipped with a tray 12, a backrest 13, a footrest 14, a safety harness 16, etc. The support assembly 200 includes a base 5 and multiple legs 6, the upper ends of which are hinged to the base 5, and the lower ends of which are supported by the ground. It should be noted that the number of legs 6 in the support assembly 200 is not limited to the four shown in the figure; in alternative embodiments, there may be three or more. In addition, in some alternative embodiments, the multiple legs 6 may be hinged to the base 5 in pairs via the same pivot. Furthermore, in alternative embodiments, the connection between the upper ends of the multiple legs 6 and the base 5 is not limited to hinged connections. For example, the upper ends of each leg 6 may be slidably connected to the base 5, allowing them to extend or retract horizontally.

Referring to Figure 1, the seat 1 is indirectly mounted on the base 5 via a height adjustment mechanism 2, such that the seat assembly 100 is supported by the bracket assembly 200. Of course, the mounting method of the seat assembly 100 and the bracket assembly 200 is not limited to the example described above. For example, in some alternative embodiments, the height adjustment mechanism 2 may be omitted from the seat assembly 100; the seat 1 may be directly rotatably connected to the base 5, or the seat 1 may be directly fixedly connected to the base 5. In some alternative embodiments, the base 5 may be further omitted, and the upper ends of the multiple support legs 6 may 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 is retractable, making the height of the support assembly 200 adjustable, and thus the height of the high chair 1000 adjustable. More specifically, each leg 6 includes, for example, at least two telescopic legs that are sequentially nested together, 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, their lengths adjusted to the desired length, and then locked again.

Referring again to Figure 1, in some embodiments, the height of the seat 1 can be adjusted using the height adjustment mechanism 2, thereby adjusting the height of the high chair 1000. The height adjustment mechanism 2 may include a support base 27, two adjusting members 21 disposed opposite each other in the first horizontal direction H1, and the aforementioned seat (also referred to as a movable member) 1. The upper end of each adjusting member 21 is movably connected to the seat 1, and the lower end of each adjusting member 21 is hinged to the support base 27 via a first shaft 31. The support base 27 supports the seat 1 via the two adjusting members 21. The axis of the first shaft 31 is perpendicular to the first horizontal direction H1. In the embodiment shown in Figure 1, the support base 27 is rotatably mounted on the base 5. By controlling the rotation of the support 27 relative to the base 5, the orientation of the seat 1 can be easily adjusted without moving the entire high chair 1000. In some alternative embodiments, the base 5 can serve as the support 27 connected to each adjusting element 21; that is, the base 5 and the support 27 are a single piece fixed to each other. In some embodiments, the base 5 and the support 27 are, for example, integrally molded, and the height adjustment mechanism 2 can accordingly eliminate the need for a separate support 27 outside the base 5.

See Figures 2 and 3 for a partial front view of the high chair 1000. The upper ends of the two adjusting members 21 connect to the seat 1 at two connection points P1 and P2. Connection point P1 corresponds to the connection point between one adjusting member 21 and the seat 1, and connection point P2 corresponds to the connection point between the other adjusting member 21 and the seat 1. By controlling the rotation of the two adjusting members 21 around their corresponding first axes 31, the positions of the two connection points P1 and P2 relative to their respective adjusting members 21 remain unchanged, but their positions relative to their respective seats 1 change. More specifically, the two connection points P1 and P2 located at the upper ends of the two adjusting members 21 are either opposite to or close to each other along the seat 1 in the first horizontal direction H1. As each adjusting member 21 rotates, the positions of the connection points P1 and P2 between each adjusting member 21 and the seat 1 rise or fall accordingly in the vertical direction V, thereby raising or lowering the seat 1. In some embodiments, during the rotation of two adjusting members 21 around their corresponding first axes 31, the distance between the upper ends of the two adjusting members 21 is always less than the distance between their 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 opposite to each other, the seat 1 rises; when the upper ends of the two adjusting members 21 are close together, the seat 1 falls.

Referring again to Figures 2 and 3, in some embodiments, the seat 1 has a first height G1 and a second height G2 relative to the support 27, where the first height G1 is greater than the second height G2. The height of the seat 1 relative to the support 27 is referenced to the vertical distance between the connection point of the adjusting member 21 and the seat 1 and 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 27, the seat 1, and the two adjusting members 21 define a first area S1 (the first area S1 is outlined by dashed lines in Figure 2). As described above, the two connection points P1 and P2 are formed at the connection point between the seat 1 and the two adjusting members 21. Connection points P3 and P4 are formed at the connection point between the support 27 and the two adjusting members 21. In some embodiments, the two first axes 31 correspond to connection points P3 and P4. When the seat 1 is at the second height G2, the connection points P1~P4 between the support 27, the seat 1, and the two adjusting members 21 define a second area S2 (the second area S2 is enclosed by dashed lines in Figure 3). The first area S1 is larger than the second area S2. That is, when the height of the seat 1 relative to the support 27 decreases, the area defined by the connection points P1, P2, P3, and P4 between the support 27, the seat 1, and the two adjusting members 21 tends to decrease. Conversely, when the height of seat 1 relative to support 27 increases, the area defined by the connection points P1, P2, P3, and P4 between support 27, seat 1, and the two adjusting members 21 tends to increase.

It should be noted that in some alternative embodiments, when controlling the two adjusting members 21 to rotate around the corresponding first axis 31, the positions of the two connection points P1 and P2 relative to their respective seats 1 do not change, but the positions of the two connection points P1 and P2 relative to their respective adjusting members 21 change, thus raising or lowering the seat 1.

Referring to Figures 4 and 5, Figure 4 shows a rear perspective view of the high chair 1000, and Figure 5 is a U1-U1 sectional view of the high chair 1000 shown in Figure 2. The high chair 1000 may also include a rotation adjustment mechanism for locking the relative positions of the support 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 while the child is eating. In some embodiments, the third locking member 275 is movably mounted on the support 27 in the vertical direction V, and the third locking member 275 has an outwardly protruding operating portion 2751, and the support 27 has a longitudinal hole 270 through which the operating portion 2751 passes. The base 5 has one, two, or more positioning holes 50 arranged circumferentially. These positioning holes 50 are, for example, evenly distributed circumferentially, with the axis of each positioning hole 50 parallel to the vertical direction V. When the third locking member 275 is inserted into a positioning hole 50, the support 27 is locked in a position. When the orientation of the seat 1 needs to be adjusted, the third locking member 275 is lifted upwards until it exits the currently inserted positioning hole 50, then the seat 1 is rotated to the appropriate position, and the third locking member 275 is then inserted into another positioning hole 50. In some alternative embodiments, the positions of the third locking member 275 and the positioning holes 50 on the support 27 and the base 5 can be interchanged. In some alternative embodiments, the third locking member 275 can move horizontally to insert into or withdraw from horizontally extending positioning holes 50. It should be noted that in some alternative embodiments, the aforementioned adjusting element 21 may not be provided between the support 27 and the seat 1. The support 27 may be integral with the seat 1, or it may be attached to the seat 1 using screws, rivets, snap-fits, or other methods. In this case, the high chair 1000 can still be equipped with a third locking element 275 to allow the circumferential position of the seat 1 relative to the base 5 to be adjustable.

Referring to Figure 5, in some embodiments, a fourth elastic element 44 may be provided between the support 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, thus preventing the third locking member 275 from being accidentally disengaged from the positioning hole 50. Of course, in some alternative embodiments, the fourth elastic element 44 may not be provided. It can be understood that when the third locking member 275 is provided on the base 5, the fourth elastic element 44 is provided between the base 5 and the third locking member 275.

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

Referring to the perspective view of the adjusting member 21 shown in Figure 7, in some embodiments, each adjusting member 21 includes a pair of connecting arms 211 disposed opposite each other in a second horizontal direction H2, which is perpendicular to the first horizontal direction H1 (see Figure 1). 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 hinged to the support seat 27 via a first shaft 31. At least one of the two opposite surfaces of the pair of connecting arms 211 is provided with a groove 2111, and the seat 1 is provided with a protrusion 102 that slidably engages with the groove 2111 (see Figure 9). The engagement between the groove 2111 and the protrusion 102 limits the range of movement of each adjusting member 21 relative to the seat 1. In some embodiments, each adjusting element 21 further includes a side plate 212 connected between a pair of connecting arms 211, which facilitates the uniformity of rotation of the pair of connecting arms 211.

Referring to Figures 6 to 8, Figure 8 shows a perspective view of the support 27. In some embodiments, in a pair of corresponding support members 271 and adjusting members 21, the upper end of the support member 271 is provided with a mounting hole 2710, and the lower end of the adjusting member 21 is provided with a first shaft 31. The first shaft 31 is hinged to the mounting hole 2710, such that the adjusting member 21 is hinged to the support member 271 via the first shaft 31. In some alternative embodiments, the positions of the mounting hole 2710 and the first shaft 31 at the upper end of the support member 271 and the lower end of the adjusting member 21 can be interchanged.

Referring to Figures 7 and 8, in some embodiments, an angle limiting mechanism 28 is provided between the adjusting member 21 and the support member 271. 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 wall of the mounting hole 2710 and extends circumferentially, and the elastic telescopic pin 282 is provided on the first shaft 31 and can extend and retract radially along 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. To facilitate the insertion of the elastic telescopic pin 282 into the first arc-shaped groove 281, the wall of the mounting hole 2710 can be provided with a bevel 2712. The bevel 2712 guides the elastic telescopic pin 282 into the first arc-shaped groove 281. Of course, in other embodiments, the angle limiting mechanism 28 can also have other implementations, as long as it can limit the rotation angle range of the adjusting member 21.

Referring to Figure 6, the height adjustment mechanism 2 may further include two first locking elements 22, each corresponding to one of the two adjusting elements 21. Each first locking element 22 is used to lock the relative position of the corresponding adjusting element 21 to the seat 1, thereby locking the seat 1 at the adjusted height. In some embodiments, each first locking element 22 may be directly or indirectly disposed on the upper end of the corresponding adjusting element 21. When each adjusting element 21 has moved into position, each first locking element 22 engages with the slot 101 on the seat 1, thereby locking the relative position of each adjusting element 21 to the seat 1.

Referring to Figures 6 and 9, Figure 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 multiple slots 101, arranged along a first horizontal direction H1. A first portion (two, three, or more slots 101) of the multiple slots 101 corresponds to a first locking member 22, and a second portion (two, three, or more slots 101) of the multiple slots 101 corresponds to another first locking member 22. The first portion of the slots 101 and the second portion of the slots 101 are symmetrically arranged. Each first locking member 22 moves in the vertical direction V to engage or disengage from the corresponding slot 101 on the bottom of the seat 1. When the first locking member 22 engages with the slot 101, the first locking member 22 is in the locked position. When the first locking member 22 disengages from the slot, the first locking member 22 is in the unlocked position. Furthermore, each first locking member 22 moves in the first horizontal direction H1 to correspond to a different slot 101. In alternative embodiments, the layout of the multiple slots 101 and the movement of the first locking members 22 can also be different. For example, the multiple slots 101 can be provided on the vertically extending side wall (e.g., side wall 11) of the seat 1, and the first locking member 22 engages or disengages from the slot 101 by moving in the second horizontal direction H2.

Referring to Figures 6 and 11, Figure 11 shows 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 slidably engage with the seat 1. The two sliders 23 are respectively connected to the upper ends of two adjusting members 21 via second shafts 32, which are parallel to the first shaft 31. In some embodiments, the two second shafts 32 correspond to connection points P1 and P2. In some embodiments, each slider 23 is provided with a through hole 2301, and the upper end of the connecting arm 211 of each adjusting member 21 is provided with a through hole 2110. Each second shaft 32 passes through the corresponding through hole 2301 and through hole 2110. Two sliders 23 correspond one-to-one with two first locking elements 22, and each first locking element 22 is movably connected to its corresponding slider 23. Referring to Figure 6, when each first locking element 22 disengages from its corresponding slot 101, it controls the two adjusting elements 21 to rotate in opposite directions around their respective first axes 31. The upper ends of the two adjusting elements 21 then drive the two sliders 23 to move away from each other or closer together in the first horizontal direction H1 via the second axis 32, and the seat 1 is raised or lowered accordingly. When the height of seat 1 is adjusted to a suitable position, each first locking member 22 moves vertically V relative to its corresponding slider 23 and engages with its corresponding slot 101, thus locking the position of the two sliders 23. This, in turn, locks the relative position of each adjusting member 21 to seat 1, thereby locking seat 1 at the adjusted height. In some embodiments, each slider 23 has a cavity 230 (see Figure 13), and each first locking member 22 is installed in its corresponding cavity 230, which limits the vertical movement V of the first locking member 22 relative to its corresponding slider 23.

Referring to Figures 6, 9, 11, and 12, Figure 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 Figures 9 and 12) disposed opposite each other in a second horizontal direction H2, and a cover 15 covering the bottom of the two side walls 11. Multiple 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. Fasteners (not shown) pass through holes 151 (Figure 12) in the cover 15 and connect to holes 105 (Figure 9) in the seat 1. The bottom surface of the seat 1, the two side walls 11, and the cover 15 enclose a receiving cavity 10 (see Figure 6). Two sliders 23 and two first locking members 22 are located in the receiving cavity 10. As described above, the two sliders 23, along with the two first locking members 22, can move along a first horizontal direction H1. The second shaft 32 corresponding to each slider 23 extends from the two side walls 11 and is hinged to the through hole 2110 at the upper end of the corresponding adjusting member 21. Each side wall 11 of the receiving cavity 10 is provided with a first elongated hole 110 (see Figures 9 and 12) corresponding to both ends of each second shaft 32, which extends along the first horizontal direction H1. By installing each slider 23 and each first locking member 22 in the receiving cavity 10, the normal movement of each slider 23 can be prevented from being interfered with by the external environment. The engagement of each second shaft 32 with its corresponding first elongated hole 110 also limits the range of movement of each adjusting element 21 relative to the seat 1.

Referring to Figure 10, a perspective view illustrating the first locking member 22 and related components, the height adjustment mechanism 2 may further include a first elastic element 41 for driving each of the first locking members 22 to engage with the seat 1. The first elastic element 41 may include a spring installed within the cavity 230 (see Figure 13) of each slider 23, the spring clamping between the slider 23 and the corresponding first locking member 22.

Referring to Figures 6, 10, and 11, to facilitate operation of each first locking element 22, in some embodiments, the height adjustment mechanism 2 further includes two first driving elements 24, each corresponding to one of the two first locking elements 22. Each first driving element 24 is drivenly connected to its corresponding first locking element 22, such that when each first driving element 24 is subjected to an external force F1, it moves in a first horizontal direction H1, driving the corresponding first locking element 22 to move downwards and disengage from and engage with the slot 101 of the seat 1.

There are many ways to convert the horizontal movement of each first drive 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, the first pin 221 being parallel to the first axis 31. In some embodiments, each slider 23 has an elongated hole 2302 extending in the vertical direction V (see Figure 14), and the first pin 221 slidably engages with the elongated hole 2302. Each first drive member 24 is provided with a hole 240, through which each first pin 221 passes. Each hole 240 has a driving ramp 241 (see Figure 10), which abuts against the corresponding first pin 221. Referring to Figures 6 and 10, when each first driving member 24 is subjected to an external force F1 and moves in the first horizontal direction H1, its driving ramp 241 pushes the corresponding first pin 221 downward, and each first pin 221 drives the corresponding first locking member 22 to disengage from the slot 101. When the external force F1 is removed, the first elastic element 41 drives each first driving member 24 to move upward and engage with the corresponding slot 101. In some alternative embodiments, the hole 240 can be designed as an elongated, slanted hole. In this case, the first elastic element 41 can be omitted. By applying a force opposite to the direction of the external force F1 to each of the first driving members 24, the corresponding first pin 221 can be pushed upward, causing each of the first locking members 22 to engage with the corresponding slot 101. In some alternative embodiments, the positions of the first pin 221 and the hole 240 with 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 illustrate exploded views of the high chair in two directions. In some embodiments, the height adjustment mechanism 2 may further include two first release elements 25, each corresponding to one of the two first drives 24, and each first release element 25 is operatively connected to its corresponding first drive 24. The caregiver can conveniently apply the aforementioned external force F1 to each of the first drives 24 using the two first release elements 25. In some embodiments, referring to Figures 11 and 13, the inner surface of the cover 15 is provided with two protrusions 152 spaced apart in the second horizontal direction H2. Each first release member 25 has an elongated hole 250 in the portion located in the receiving cavity 10. The two protrusions 152 slidably engage 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 Figure 14, the cover 15 is provided with two through holes 150. Each first release member 25 includes an operating part 252. The operating parts 252 of the two first release members 25 extend from the two through holes 150 and slidably engage 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 aforementioned external force F1 (FIG. 10) to each of the first actuators 24 via the operating portion 252 of each of the first release elements 25. In some alternative embodiments, the height adjustment mechanism 2 may include a release element 25, such as a knob, operably connected to both first actuators 24 simultaneously to drive both first actuators 24 to move in a first horizontal direction H1.

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

The following description, in conjunction with Figures 6 and 11, illustrates the process by which the height adjustment mechanism 2 adjusts the height of the seat 1.

Referring to Figures 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. When the caregiver applies an external force F1 to the operating parts 252 of the two first release members 25, the two first release members 25 pull the two first driving members 24 towards each other in the first horizontal direction H1 through the two first traction members 261. The driving ramps 241 of the two first driving members 24 push the two first pins 221 downward, causing the two first locking members 22 to move downward and disengage from the slots 101. At this time, pressing down on or pulling up on seat 1 causes seat 1 to move vertically. Simultaneously, the two sliders 23 drive the two first locking members 22 to move in opposite directions (either towards or away from each other) in the first horizontal direction H1. When the seat 1 is at the correct height, the external force F1 is released, and the two first locking members 22 automatically move upward under the action of the first elastic element 41 and engage with the slot 101, thereby locking seat 1 at the adjusted height. As the two first locking members 22 move upward, they push the two first driving members 24 to reset. The return process of the two first driving members 24 drives the two first locking members 22 to reset as well.

It is understandable that, under the action of the protective sleeve 262, even if the first locking member 22 engages with different slots 101, the release stroke of the first releasing member 25 for releasing the first locking member 22 is the same as the distance the first traction member 261 can slide within the protective sleeve 262. More specifically, the protective sleeve 262 is, for example, a rubber sleeve, and the opposing or receding movements of the two sliders 23 in the first horizontal direction H1 will cause the protective sleeve 262 to deform. The first traction member 261 will bend or straighten as a whole with the deformation of the protective sleeve 262, but this will not affect the sliding stroke of the first traction member 261 within the protective sleeve 262. Therefore, regardless of which slot 101 the first locking member 22 engages with, operating the first releasing member 25 will pull the first traction member 261, causing the first driving member 24 to move. Similarly, when the external force is removed, the repositioning of the first locking member 22 will cause the first driving member 24 to reset, which in turn will cause the first releasing member 25 to reset via the first traction member 261.

Referring to Figures 13 and 14, in some embodiments, the height adjustment mechanism 2 may further include a second elastic element 42 for actuating the reset of each of the first release members 25. In some embodiments, the second elastic element 42 may include, for example, two springs located in the receiving cavity 10 (see Figure 6) and clamped between the two first release members 25.

Referring to Figures 15 and 16, perspective views are provided showing the high chair 1000 in different states of the folding mechanism 7. In some embodiments, the upper ends of each leg 6 are hinged to the base 5. The folding mechanism 7 is used to change the state of the support assembly 200. In some embodiments, the folding mechanism 7 is connected to multiple legs 6 and adjusts the height of the base 5 by controlling the opening degree of the multiple legs 6, thereby adjusting the height of the seat 1. In some embodiments, the multiple legs 6 have a minimum opening degree and a maximum opening degree. Referring to Figure 15, when the multiple legs 6 are at their minimum opening degree, the acute angle formed by each leg 6 with the vertical direction is minimized, corresponding to the maximum height of the base 5. Conversely, referring to Figure 16, when the multiple support legs 6 are at their maximum opening, the acute angle formed by each support leg 6 and the vertical direction reaches its maximum, corresponding to the lowest height of the base 5. In some embodiments, when the multiple support legs 6 are at their minimum opening, it corresponds to the folded state of the support assembly 200. In some embodiments, the support assembly 200 can still stand on the ground when folded. In some alternative embodiments, the multiple support legs 6 can also have one or more states between the maximum and minimum opening, thereby allowing the base 5 to have multiple adjustable heights.

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

There are many ways in which the connectors 72 are slidably connected to their corresponding legs 6. See Figure 17, a bottom-view perspective of the high chair. In some embodiments, each connector 72 is hinged to the adjusting seat 71 via a third axis 33, and each connector 72 has a slot 721. Each leg 6 is provided with a slide rail 61, and each connector 72 is slidably connected to the slide rail 61 on its corresponding leg 6 through its slot 721. In some alternative embodiments, each connector 72 may include a sleeve structure that is fitted onto the corresponding leg 6 and is movable along the leg 6 itself.

Referring to Figure 18, a cross-sectional view along U3-U3 of the support assembly shown in Figure 16 is shown, with the support assembly in the open state. Figure 19 shows a cross-sectional view of the support assembly shown in Figure 18 in the folded state. In some embodiments, at least one leg 6 is provided with at least one locking groove 62. The folding mechanism 7 also includes at least one second locking member 73, which engages with the locking groove 62 of the leg 6 to lock the relative position of the adjusting 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 multiple second locking members 73, each corresponding to one of the multiple legs 6, and each leg 6 is provided with at least one locking groove 62. Each second locking element 73 engages with a locking groove 62 on a corresponding support leg 6 to lock the relative position of the adjusting seat 5 and each support leg 6, thus more reliably locking the relative position of the adjusting seat 71 and each support leg 6.

Referring to Figures 18 and 19, in some embodiments, each support leg 6 may have two or more locking slots 62, spaced apart along the length L of the support leg 6. When multiple second locking members 73 engage with locking slots 62 at different positions, the base 5 is locked at different heights. In some embodiments, when each locking member 73 engages with the lowermost locking slot 62, the bracket assembly 200 is in a folded state, and the engagement of the locking members 73 and the locking slots 62 prevents multiple support legs 6 from accidentally opening. In some alternative embodiments, each support leg 6 may also have only one locking slot 62.

Referring again to Figure 18, in some embodiments, each second locking member 73 corresponds one-to-one with and is movably connected to each connecting member 72. More specifically, each second locking member 73 has a second elongated hole 731 that fits onto the third axis 33 of the corresponding connecting member 72, thus facilitating a compact structure of the folding mechanism 7. In some embodiments, each connecting member 72 has a groove 720 through which the corresponding second locking member 73 passes, defining the extension path of the second locking member 73.

Referring to Figures 17 and 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. The at least one second release member 74 is connected to at least one second locking member 73 via the at least one second pull member 75 to drive the at least one second locking member 73 to disengage from the corresponding lock slot 62. In some embodiments, the second release member 74 may be configured as one, and the number of second pull members 75 is the same as the number of second locking members 73. The second release member 74 drives multiple second locking members 73 to disengage from the corresponding lock slot 62 simultaneously via multiple second pull members 75, thus simplifying the release operation. In some alternative embodiments, the number of second release elements 74 may be the same as the number of second locking elements 73, with each second release element 74 independently driving a corresponding second locking element 73 via a respective second traction element 75.

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

Referring to Figures 17 to 21, Figures 20 and 21 illustrate top perspective views of some parts of the bracket assembly. In some embodiments, the adjusting seat 71 includes, for example, an upper housing 711 and a lower housing 712, which are joined together and define a cavity 70 between them. Each second traction member 75 is located within the cavity 70, and each second locking member 73 extends relative to the cavity 70. A second release member 74 is a knob that can be mounted on the lower housing 712. The second release member 74 has a number of second arcuate grooves 740 corresponding to the number of second traction members 75. Each second arcuate groove 740 extends spirally in the circumferential direction, such that a first end of each second arcuate groove 740 is close to the center M of the second release member 74, and a second end is close to the outer periphery of the second release member 74. Each second traction member 75 is slidably connected to at least one second arcuate groove 740 via a second pin 7521.

Referring to Figures 18, 19, and 20, when the second pin 7521 of each second traction member 75 is positioned at the second end of the corresponding second arcuate groove 740, each second locking member 73 engages with the corresponding locking groove 62 under the action of the third elastic element 43, locking the position of the adjusting seat 71 relative to each support leg 6, and locking the height of the base 5. When it is necessary to adjust the position of the adjusting seat 71, the torque T shown by the arrow in Figure 17 is applied to the operating part 741 of the second releasing member 74. The second releasing member 74 rotates and drives each second pin 7521 to move toward the center of the second releasing member 74 through the groove wall of each second arcuate groove 740, and the third elastic element 43 is compressed. When each of the second pins 7521 is positioned at the first end of the corresponding second arcuate groove 740, each of the second locking members 73 disengages from the corresponding locking groove 62, allowing the adjusting seat 71 to move. After the adjusting seat 71 moves to the appropriate position, the torque T is released, and each of the second locking members 73 automatically engages with the corresponding locking groove 62 under the action of the third elastic element 43. Furthermore, the engagement of the second pins 7521 with the second arcuate groove 740 drives the second release member 74 to reset. In some alternative embodiments, a torsion spring for resetting the second release member 74 can also be installed in the adjusting seat 71.

Referring to Figures 18 to 21, in some embodiments, each of the second traction members 75 may include a linkage 751 and a second drive member 752 (see Figure 18). The first end of the linkage 751 is linked to a corresponding second locking member 73 via a fourth shaft 34, and the second end of the linkage 751 is linked to the first end of the second drive member 752 via a fifth shaft 35. The second end of the second drive member 752 is connected to a second release member 74; more specifically, the second end of the second drive member 752 is slidably connected to a corresponding second arcuate groove 740 of the second release member 74 via a second pin 7521. In some embodiments, each of the third elastic elements 43 may be mounted between the second drive member 752 and the upper housing 711. Of course, in other embodiments, each of the second traction members 75 may have other embodiments; for example, the second traction member 75 may be a flexible cable.

Referring to Figure 17, in some embodiments, the base 5 is made of plastic, for example, and a reinforcing plate 51 may be installed at the bottom of the base 5. The reinforcing plate 51 is, for example, a metal plate (e.g., an iron plate) used to enhance the structural strength of the base 5. The reinforcing plate 51 includes multiple hinge seats 511, and the upper ends of multiple legs 6 are hinged to multiple hinge seats 511.

Referring to Figures 16 and 22, Figure 22 illustrates a perspective view of another use of the high chair 1000. In some embodiments, each leg 6 may include a detachably connected upper leg (also referred to as the first leg) 601, a lower leg (also referred to as the second leg) 602, and a foot 603. More specifically, when the upper leg 601 and the lower leg 602 are connected, the foot 603 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 mounted on the bottom of the upper leg 601. Thus, the support assembly 200 can provide more height options for the base 5.

Referring to Figures 16 and 22, in some embodiments, the slide rail 61 is mounted on the upper support leg 601, and the upper support leg 601, lower support leg 602, and support foot 602 are detachably connected, for example, by screws or snap-fits. This allows the folding mechanism 7 to continue functioning normally even after the lower support leg 602 is removed.

Referring to Figure 13, in some embodiments, each slide rail 61 may have a hook 610 at its lower end, which can be detachably connected to the storage bag 8. The storage bag 8 can provide additional storage space for the high chair.

It should be noted that the high chair 1000 provided in this embodiment of the invention can be selectively configured with one or both of the height adjustment mechanism 2 and the folding mechanism 7. In some high chairs 1000 that simultaneously have 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 the high chair 1000 with more height adjustment possibilities.

It should be noted that the application scope of the height adjustment mechanism 2 provided in this embodiment is not limited to the high chair 1000. By replacing the seat 1 of the height adjustment mechanism 2 with any suitable movable component, the height adjustment mechanism 2 can be applied to any suitable product. Furthermore, the application scope of the folding mechanism 7 provided in this embodiment is not limited to the high chair 1000; it can also be applied to any suitable product, such as for table storage.

It should be noted that, unless otherwise expressly 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 when it is in normal use, and the directions of the "first horizontal direction," "second horizontal direction," and "vertical direction" are schematically shown in the figures using arrows H1, H2, and V. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not intended to unduly limit the scope of protection of the present invention.

Second Implementation Example

Figures 23 to 26 illustrate a perspective view of the vehicle provided in an embodiment of the present invention and a cross-sectional view of the support assembly 300 provided in an embodiment of the present invention. As shown in the figures, the vehicle is specifically illustrated using a high chair 1000 (or a child's seat, a children's dining chair, or a chair) as an example, which has a support assembly (also referred to as a leg folding structure) 300 provided in an embodiment of the present invention and a seat (also referred to as a child's 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 the unfolded state (see Figure 23), the high chair 1000 is also in the unfolded state; when the support assembly 300 is in the folded state (see Figure 25), the high chair 1000 is also in the folded state. In some alternative embodiments, the support assembly 300 may also have at least one intermediate state between an unfolded state and a folded state. It is understood that when the support assembly 300 is in different states, the seat 1 is supported at different heights to accommodate different usage scenarios. It is also understood that in some alternative embodiments, the type of high chair 1000 is not limited to the child chair exemplified in this embodiment; it may be, for example, a table, a high stool used for a bar, a tripod for supporting a camera, etc.

Referring to Figures 24 and 26, the support assembly 300 may include a base (also referred to as a support base) 5, multiple support legs 6, a first slider 761, and multiple linkages 762. The first slider 761 and linkages 762 may be part of a folding mechanism for opening or closing the multiple support legs 6.

Referring to Figures 23 and 25, seat 1 is mounted on base 5. In some embodiments, seat 1 is rotatably connected to base 5, for example, via a bottom turntable 100a, allowing adjustment of the orientation of seat 1 without rotating the entire high chair 1000. A locking device (not shown) may also be provided between seat 1 and base 5 to lock the relative rotation of seat 1 and base 5, thereby holding seat 1 in the adjusted orientation. In some alternative embodiments, seat 1 is fixedly connected to base 5 and cannot rotate relative to it.

An exploded view of the support assembly 300 shown in Figure 27 illustrates an exemplary embodiment of the base 5. The base 5 includes, for example, an upper shell 501, a middle shell 503, and a lower shell 502. The upper shell 501 and lower shell 502 are connected, for example, by fasteners (not shown) and define a receiving cavity 5001. The middle shell 503 is located, for example, within the receiving cavity 5001. In some embodiments, the middle shell 503 has, for example, 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 middle shell 503. In other embodiments, the intermediate housing 503 may be connected to one of the upper housing 501 and the lower housing 502, for example, by snap-fit or by fastener connection.

The upper shell 501 faces the seat 1. In some embodiments, the upper shell 501 has, for example, a central hole 5010, and the intermediate shell 503 has, for example, a central hole 5030. The bottom turntable 100a of the seat 1 is connected, for example, to the central holes 5010 and 5030. The middle portion of the intermediate shell 503 (or the middle portion of the base 5) has a hollow cylindrical column portion 50311 extending in the vertical direction V. The column portion 50311 is coaxial with the central hole 5030, and the outer peripheral wall of the column portion 50311 forms a slide 5031, which is located inside the receiving cavity 5001. In this embodiment, when the bar chair 1000 is in normal use, the vertical direction V corresponds, for example, to a vertical direction perpendicular to the ground (or the height direction), and the upright portion 50311 extends downward specifically in the vertical direction V. Multiple mounting seats 5032 may be provided on the outer periphery of the intermediate shell 503, each mounting seat 5032 having a hinge hole 50320. The lower shell 502, for example, has multiple holes 50201, each corresponding to one of the mounting seats 5032.

Referring to Figures 24 and 26, multiple support legs 6 are respectively hinged to the base 5, with a slide rail 5031 located in the middle of the support legs 6. The upper end of each support leg 6 passes through the hole 50201 in the lower housing 502 and is hinged to the hinge hole 50320 of the mounting base 5032 via a pivot 625. It is understood that each support leg 6 can rotate around the pivot 625; therefore, the size of the hole 50201 should not interfere with the rotation of the support leg 6. The lower ends of the multiple support legs 6 are suitable for support by the ground.

Referring to Figure 24, when the multiple support legs 6 are pivoted in opposite directions to their maximum opening degree, this corresponds to the extended state of the support assembly 300. Referring to Figure 26, when the multiple support legs 6 are pivoted in opposite directions to their minimum opening degree, this corresponds to the folded state of the support assembly 300. In some embodiments, the support assembly 300 can still stand on the ground when in the folded state. In some embodiments, the multiple support legs 6 can also have one or more states between the maximum and minimum opening degrees, and the height of the base 5 varies with the opening degree of the multiple support legs 6, thereby providing multiple support heights for the seat 1.

As can be seen from Figures 23 and 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 in the support assembly 300 is not limited to four; for example, there may be three or more legs 6. Furthermore, in some alternative embodiments, multiple legs 6 may be linked to the base 5 in pairs via the same pivot.

In some embodiments, the length of each support leg 6 is extendable, providing more height options for the seat 1. Specifically, each support leg 6 includes, for example, at least two telescopic legs that are sequentially fitted together, and a locking mechanism for releasing or locking the relative movement of these telescopic legs. When the height of the seat 1 needs to be adjusted, the telescopic legs are released, their length adjusted to the desired length, and then locked again. Alternatively, each support leg 6 may include, for example, two sleeves that are sequentially fitted together, detachably connected, allowing for two height adjustments of the seat 1 by removing or not removing the lower sleeve.

Referring to Figures 24 and 26, the first slider 761 is, for example, annular and fits inside the cavity 5001 onto the outside of the column portion 50311. The first slider 761 is movable along the column portion 50311 in the vertical direction V, that is, the first slider 761 slidably engages with the slide rail 5031. Multiple linkages 762 are connected between the first slider 761 and multiple support legs 6. More specifically, the lower housing 502 has multiple first through slots 5021 communicating with the accommodating cavity 5001. The first end of each linkage 762 passes through the first through slot 5021 and is hinged to the first sliding member 761 via a pivot 551. The second end of each linkage 762 is hinged to each support leg 6 outside the accommodating cavity 5001 via a pivot 552.

Referring to Figure 27, in some embodiments, the first slider 761 is provided with multiple slots 7610 for accommodating the first ends of multiple linkages 762. A recess 7613 may be provided near each slot 7610, and adjacent slots 7610 and recesses 7613 communicate through a shaft hole (not shown). Each pivot 551 can be inserted into the shaft hole from the recess 7613 and extend through the shaft hole into the corresponding slot 7610 to pivot with the first end of the linkage 762.

Referring to Figures 24 and 26, in some embodiments, each support leg 6 is attached to a reinforcement member 623 near the base 5. This reinforcement member 623 can be a sheet of metal (e.g., iron, steel) and is used to link with the second end of each linkage 762 via a pivot 552. Additionally, each support leg 6 may be fitted with a cover 622, which encloses the reinforcement member 623. Each cover 622 has a second through slot 6220 through which each linkage 762 passes. After passing through the second through slot 6220, the second end of each linkage 762 is linked with the reinforcement member 623 on each support leg 6 via a pivot 552. It is understood that the dimensions of each second through slot 6220 should not interfere with the rotation of the corresponding linkage 762. Each linkage 762, for example, has a bent structure.

When it is necessary to unfold or fold the support assembly 300 of this embodiment, any one leg 6 can be pushed. This leg 6 will then drive the first sliding member 761 to move relative to the column portion 50311 via a corresponding linkage 762. The first sliding member 761, in turn, drives the other legs 6 to unfold or fold synchronously via other linkages 762.

The support assembly 300 provided in this embodiment has each leg 6 connected to a first sliding member 761 via a linkage 762. The first sliding member 761 can move relative to the slide rail 5031 of the base 5, thereby causing each leg 6 to unfold or fold, resulting in a compact structure for the support assembly 300. Furthermore, folding the legs 6 does not cause the seat 1 to rise relative to the base 5, and the high chair using this support assembly 300 does not occupy excessive longitudinal space when folded.

Referring to Figures 24, 26, and 27, in some embodiments, the folding mechanism of the support 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 slider 761 via at least one connector 405, allowing the stabilizer 763 to move with the first slider 761 in the vertical direction V. Furthermore, the stabilizer 763 is capable of rotating relative to the first slider 761 about a rotation axis X-X parallel to the vertical direction V. In this embodiment, the stabilizer 763 is, for example, annular, and is fitted inside the cavity 5001 onto the outside of the column portion 50311. 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 connector 405, such as a bolt, is present, and the number of connectors 405 matches the number of through holes 7612. Each connector 405 passes through a corresponding arc-shaped hole 7631 and through hole 7612 along the vertical direction V, connecting the stabilizer 763 and the first sliding member 761 together, and each connector 405 slidably engages with the corresponding arc-shaped hole 7631. Thus, the stabilizer 763 can move along the vertical direction V with the first sliding member 761, and can also rotate relative to the first sliding member 761 about the axis of rotation X-X.

Of course, the connection method between the stabilizer 763 and the first slider 761 is not limited to the examples described above. For example, in some embodiments not shown, the positions of the arc-shaped hole 7631 and the through hole 7612 on the stabilizer 763 and the first slider 761 can be interchanged. In other embodiments not shown, at least one connector 405 includes, for example, at least two hooks, each hook extending, for example, from one of the stabilizer 763 and the first slider 761 in the vertical direction V, and adapted to engage with the other of the stabilizer 763 and the first slider 761, while allowing the stabilizer 763 to rotate relative to the first slider 761 about the axis of rotation X-X. More specifically, in some embodiments, two or more latches extend downward from the outer periphery of the stabilizer 763, with the hook body of each latch engaging the first slider 761, allowing the stabilizer 763 to move synchronously along the column portion 50311 with the first slider 761. The two or more latches are evenly spaced around the axis of rotation X-X, and the end face of the first slider 761 may be provided with an annular track that slidably engages with the hook body of each latch.

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 Figure 27, an exemplary embodiment of the first motion conversion mechanism 766 is also shown in this embodiment. Specifically, the first motion conversion mechanism 766 may include a first drive spur groove 7660 and a first drive pin 7661. The first drive spur groove 7660 is disposed on the base 5, and more specifically, for example, on the column portion 50311. The first drive pin 7661 is disposed on the stabilizer 763 and slidably engages with the first drive spur groove 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 vertically up and down with the first sliding member 761, the different inclined walls of the first driving groove 7660 abut against the first driving pin 7661, thereby pushing the stabilizer 763 to rotate in both directions around the rotation axis X-X. Of course, the implementation of the first motion conversion mechanism 766 is not limited to the above example; it only needs to be able to push the stabilizer 763 to rotate around the rotation axis X-X when the stabilizer 763 moves with the first sliding member 761. For example, in some alternative embodiments, the first drive chute 7660 may be disposed on the stabilizer 763, and the first drive pin 7661 may be mounted on the column portion 50311 of the base 5 and slidably engage with the first drive chute 7660.

For the support assembly 300 equipped with a stabilizer 763 and a first motion conversion mechanism 766, when the first sliding member 761 moves vertically in the V direction due to the push of any leg 6, the stabilizer 763 moves along with it. Under the action of the first motion conversion mechanism 766, the stabilizer 763 rotates around the axis X-X, ensuring it moves smoothly in the vertical direction V without easily tilting. This smooth movement of the stabilizer 763 in the vertical direction V is further actuated by multiple connecting members 405, allowing the first sliding member 761 to also move smoothly in the vertical direction V, thereby causing each leg 6 to extend or retract synchronously.

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 element 767 may be mounted on the lower housing 502 of the base 5, and each locking element 767 may move, for example, in a horizontal direction H that is not parallel to the vertical direction V, to engage or disengage with the first sliding element 761, thereby locking or releasing the first sliding element 761. In this embodiment, the horizontal direction H may also be referred to as the horizontal direction, and the horizontal direction H may be perpendicular to the vertical direction V, for example.

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 engage with one or more locking protrusions 7671 to lock the first slider 761 at different positions (heights) on the column portion 50311 (i.e., the slide rail 5031), thereby holding the bracket assembly 300 in the adjusted state.

Specifically, in this embodiment, each locking part 7614 includes a locking recess 76140. Each locking member 767 is located outside the receiving cavity 5001 and has two locking protrusions 7671, which are spaced apart in the vertical direction V. The lower housing 502 of the base 5 is provided with two holes 5027, through which each locking protrusion 7671 can extend into the receiving cavity. Referring to Figure 30, when the first slider 761 moves to a lower position along with the extended support leg 6, the lower locking protrusion 7671 of the two locking protrusions 7671 engages with the locking recess 76140, locking the first slider 761 and keeping the support assembly 300 in the extended state. When each locking member 767 moves in the lateral direction H, causing each locking protrusion 7671 to move out of the movement path of the first slider 761, the first slider 761 can move upward along with the folded support leg 6. After the first slider 761 moves into position, each locking member 767 moves laterally so that the upper locking protrusion 7671 engages with the locking recess 76140, locking the first slider 761 again and holding the bracket assembly 300 in the folded state. It is understood that in some alternative embodiments, each locking member 767 may include more locking protrusions 7671 spaced apart in the vertical direction V. These locking protrusions 7671 selectively engage with the locking recesses 76140 to lock the first slider 761 at different positions on the column portion 50311, thereby stably holding 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 spaced apart in the vertical direction V. Depending on the positional change of the first slider 761 relative to the post portion 50311, the locking protrusion 7671 selectively engages with one of the multiple locking recesses 76140 to restrict the sliding of the first slider 761 relative to the post portion 50311. Of course, in some alternative embodiments, each locking member 767 may have multiple locking protrusions 7671, and each locking portion 7614 may include multiple locking recesses 76140. As the first sliding member 761 moves in the vertical direction V, the multiple locking protrusions 7671 and the multiple locking recesses 76140 may selectively engage to lock the position of the first sliding member 761.

Referring to Figures 27, 31, and 32, the bracket assembly 300 may further include at least one release member 768 and at least one resilient member 769. In some embodiments, the number of release members 768 and resilient members 769 may be the same as the number of locking members 767. The release member 768 is operatively connected to the locking member 767 for actuating the locking member 767 to release the first sliding member 761. More specifically, each release member 768 may have, for example, a receiving groove 7680 in which the locking member 767 is, for example, mounted. The resilient member 769 is used to actuate the locking member 767 to lock the first sliding member 761. In some alternative embodiments, multiple locking elements 767 may share a single unlocking element 768, and the number of elastic elements 769 may differ from the number of locking elements 767.

In some embodiments, the lower housing 502 of the base 5 is provided with at least one groove 5025, the number of which, for example, matches the number of release members 768 and extends in the vertical direction V. Each release member 768 is installed in a corresponding groove 5025 and is movable along the groove 5025 in the vertical direction V. A second motion conversion mechanism 7662 is provided between each release member 768 and a corresponding locking member 767. 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 horizontal direction H, so as to allow each locking member 767 to lock or release the first sliding member 761.

Figures 31 and 32 illustrate exemplary embodiments of the second motion conversion mechanism 7662. Specifically, the second motion conversion mechanism 7662 includes a second drive groove 76620 and a second drive pin 76621. The second drive groove 76620 is disposed on the release member 768. The second drive pin 76621 is disposed on the locking member 767 and slidably engages with the second drive groove 76620. In some embodiments, a mounting hole for mounting the second drive pin 76621 may be provided on the locking member 767; in some embodiments, the second drive pin 76621 may, for example, be attached to or integrally formed with the locking member 767. When the releasing member 768 moves up and down along the slide groove 5025, the different inclined walls of the second driving groove 76620 abut against the second driving pin 76621, thereby pushing the locking member 767 to move in the lateral 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 releasing member 768 moves in the vertical direction V. For example, in some alternative embodiments, the second drive chute 76620 may be disposed on the locking member 767, and the second drive pin 76621 may be mounted on the release member 768 and slidably engage with the second drive chute 76620.

Referring to Figures 30 to 32, the releasing element 768 is connected to the locking element 767 through the cooperation of the second driving groove 76620 and the second driving pin 76621. By properly setting the release stroke of the releasing element 768, it is prevented that the locking protrusion 7671 will completely retract from the corresponding hole in the lower housing 502 when the releasing element 768 drives the locking element 767 to release, thus preventing the releasing element 768 from falling out of the slide groove 5025. Of course, there are many other ways to prevent the releasing element 768 from falling out of the slide groove 5025, which will not be described in detail here.

In this embodiment, the release member 768 may be provided with a protruding operating portion 7681 to facilitate user operation of the release member 768. Furthermore, in this embodiment, when the release member 768 moves upward, it drives the locking member 767 to release the first sliding member 761; when the release member 768 moves downward, it drives the locking member 767 to lock the first sliding member 761. Referring to FIG30, the elastic member 769, for example a spring, may be arranged in the vertical direction V and sandwiched 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 towards the position where the first sliding member 761 is locked. Of course, in some alternative embodiments, it can be designed such that when the release member 768 moves downward, it drives the locking member 767 to release the first sliding member 761; and when the release member 768 moves upward, it drives the locking member 767 to lock the first sliding member 761.

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

1. The base 5 is not limited to being composed of an upper shell 501, a middle shell 503, and a lower shell 502. For example, in some embodiments, the base 5 may not have an upper shell 501, with the middle shell 503 directly facing the seat 1, and the middle shell 503 and the lower shell 502 defining a receiving cavity 5001. Alternatively, in some embodiments, the base 5 may not have a lower shell 502, and therefore the base 5 may not have a receiving cavity 5001, in which case the first sliding member 761 and the stabilizing member 763 may be exposed. Components associated with the lower shell 502, such as the locking member 767, the releasing member 768, and the elastic member 769, may be mounted on the middle shell 503. In some alternative embodiments, the base 5 may even consist only of the intermediate shell 503.

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

III. In some embodiments, at least one of the releasing member 768 and the elastic member 769 may be omitted. For example, a groove extending in the transverse direction H is provided on the base 5, and the locking member 767 is, for example, a latch that slides into the groove. The locking member 767 may have an operating part for user operation, by which the user manually moves the operating part to 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 towards the position where the first sliding member 761 is locked.

Third Implementation Example

One embodiment of the present invention provides a high chair, more specifically, a children's chair (or children's dining chair, chair). As shown in Figures 33 to 35, the children's chair includes a seat assembly 100, a support assembly (also referred to as a support component) 200, and a seat adjustment device 400. The seat assembly 100 is connected to the support assembly 200 via the seat adjustment device 400. The support assembly 200 includes a base (also referred to as a support seat) 5 and a plurality of legs (also referred to as support feet) 6 connected to the base 5. The base 5 is provided with a receiving hole 5211, through which the seat adjustment device 400 is connected to the base 5 and is rotatable relative to the base 5. It should be understood that the seat adjustment device 400 provided by this invention is not only applicable to children's seats, but also to other types of chairs such as growing chairs and office chairs.

In some embodiments, as shown in Figures 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 base 435, an adjustment seat 436, and a rotation adjustment mechanism 437. The first adjustment column 431 is located approximately at the center of the bottom of the seat assembly 100, and the second adjustment column 432 is located approximately at the center of the top of the base 5. The first adjustment column 431 is connected to the seat assembly 100 via the mounting base 435. The mounting base 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 together form a first receiving cavity 4354, in which at least a portion of the height operating member 4337 (described later) is received. Specifically, the lower cover 4352 is detachably connected to the upper cover 4351, for example, by means of a rivet or other connector. Referring to FIG. 37, the connecting pipe 4353 is connected to the upper cover 4351. Specifically, the connecting pipe 4353 is integrally formed with the upper cover 4351. The connecting pipe 4353 is disposed around the outer periphery of the first adjusting post 431 and together with the first adjusting post 431 forms a second receiving cavity 4355 for partially receiving the height adjustment mechanism 433. The second receiving cavity 4355 communicates with the first receiving cavity 4354 to drive the height locking member 4331 (described later) and the height operating member 4337 (described later) of the height adjustment mechanism 433. In other embodiments, the lower cover 4352 may be omitted, and the height operating member 4337 may be operatively connected to the upper cover 4351.

Referring to Figures 37 and 38, the first adjusting post 431 has a hollow inner cavity 4311. Specifically, the first adjusting post 431 is a hollow tubular structure. The second adjusting post 432 is connected to the support assembly 200 and is inserted into the first adjusting post 431. In some embodiments, the first adjusting post 431 and the second adjusting post 432 are inserted into each other in a non-rotatable manner. Specifically, one end of the second adjusting post 432 is inserted into the hollow inner cavity 4311 and can move along the hollow inner cavity 4311, and the other end of the second adjusting post 432 is connected to the base 5. In this embodiment, the second adjusting post 432 is a hollow tubular structure, and the second adjusting post 432 is rotatably connected to the base 5 via an adjusting seat 436. Specifically, the adjusting base 436 is received in the receiving hole 5211 and is rotatable relative to the base 5, while the second adjusting post 432 is fixedly connected to the adjusting base 436. In other embodiments, the adjusting base 436 may be received in the receiving hole 5211 and fixed relative to the base 5, while the second adjusting post 432 is rotatably connected to the adjusting base 436. In other embodiments not shown, the adjusting base 436 may be omitted, and the second adjusting post 432 may be fixedly or rotatably connected to the receiving hole 5211.

Referring to Figures 37 and 38, in this embodiment, height adjustment mechanisms 433 are provided on both the left and right sides of the first adjusting column 431. For ease of description, the height adjustment mechanism 433 located on the left side in Figure 37 will be used as an example. The structure and working principle of the height adjustment mechanism 433 located on the right side in Figure 37 are largely 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 fixed base 4333, a first reset member 4334, and a plurality of adjustment holes 4336 disposed on the second adjusting post 432. The fixed base 4333 is connected to the first adjusting post 431. In this embodiment, the fixed base 4333 is inserted into one end of the first adjusting post 431 away from the mounting base 435. The fixed base 4333 includes a first portion 43331 and a second portion 43332. The first adjusting post 431 is inserted into the first portion 43331. The first portion 43331 is at least partially received within the second receiving cavity 4355 for connection with the height locking member 4331. The second portion 43332 covers the end of the first adjusting column 431 away from the upper cover 4351 and abuts against the connecting pipe 4353. The second portion 43332 forms the bottom wall of the second receiving cavity 4355.

Referring to Figures 42 and 44, at least two ear plates 43337 are disposed on the outer periphery of the first portion 43331. In this embodiment, there are four ear plates 43337, which are symmetrically distributed on the outer periphery of the first portion 43331. For ease of description, two ear plates 43337 are used as an example. The two ear plates 43337 are arranged parallel to each other and together with the second portion 43332 form a first receiving groove 43336. At least a portion of the height drive member 4332 is received in the first receiving groove 43336 and can move along the first receiving groove 43336. A first protrusion 43338 is disposed in the first receiving groove 43336. The lug 43337 of the fixing base 4333 is provided with a guide groove 43333, the extending direction of which is perpendicular to the axis of the first adjusting post 431.

Referring to Figures 37, 38, and 40, a protrusion 4322 is provided on the outer surface of the second adjusting column 432. Specifically, the second adjusting column 432 includes an adjusting tube 4323 and a plug 4321. One end of the adjusting tube 4323 is connected to the base 5, and the other end is provided with the plug 4321. The side surface of the plug 4321 forms a protrusion 4322. The protrusion 4322 abuts against the cavity wall of the hollow inner cavity 4311 of the first adjusting column 431 and can slide relative to the cavity wall of the hollow inner cavity 4311 of the first adjusting column 431. The protrusion 4322 ensures the stability of the sliding of the first adjusting column 431. Optionally, the number of protrusions 4322 can be one or at least two. In some embodiments not shown, the outer wall of the adjusting tube 4323 may form a protrusion 4322, which is not a limitation of this invention. Referring also to Figure 41, a fixing seat 4333 is provided at the end of the first adjusting column 431 away from the seat assembly 100. The fixing seat 4333 has a groove 43335, which is adapted to mate with the protrusion 4322 and allows the protrusion 4322 to pass through. Specifically, the second part 43332 of the fixing seat 4333 has a socket 43334 corresponding to the hollow cavity 4311. Referring also to Figure 41, the socket 43334 communicates with the hollow cavity 4311. The side wall of the socket 43334 has a groove 43335. Optionally, the number of 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 mating of the grooves 43335 and protrusions 4322 serves a guiding function and facilitates the insertion of the second adjusting post 432 into the hollow cavity 4311 of the first adjusting post 431. In other embodiments not shown, the cavity wall of the hollow cavity 4311 of the first adjusting post 431 may form the grooves 43335. In other embodiments not shown, the cavity wall of the hollow cavity 4311 may form the protrusions 4322, and the outer surface of the second adjusting post 432 may form the grooves 43335, etc. This invention does not limit the scope of the invention in these aspects.

In some embodiments, as shown in Figures 37 and 38, at least a portion of the height locking member 4331 is received in the second receiving cavity 4355. Referring also to Figure 42, one end of the height locking member 4331 is connected to the fixing base 4333. Specifically, one end of the height locking member 4331 is connected to the first drive pin 4335, which is inserted into the guide groove 43333 of the fixing base 4333 and is movable along the guide groove 43333. This arrangement allows the height locking member 4331 to move along the extension direction of the guide groove 43333, enabling it to move closer to or further away from the portion of the second adjusting post 432 with the adjusting hole 4336, thereby preventing the height locking member 4331 from shifting during movement.

The other end of the height locking member 4331 is a first engaging end 43311. The first adjusting post 431 is provided with a first through hole 4312 through which the first engaging end 43311 of the height locking member 4331 passes. The fixing seat 4333 is correspondingly provided with a second through hole 43339. Referring to Figure 12, the second through hole 43339 passes through the first part 43331 and the first protrusion 43338 of the fixing seat 4333, and communicates with the first through hole 4312. The height locking member 4331 is movably inserted through the first through hole 4312 and the second through hole 43339, and switches between a first locked position (also referred to as a height locked position) and a first unlocked position (also referred to as a height unlocked position). When the height locking member 4331 is in the first locked 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 there is one first engaging end 43311, which 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 engages with any adjustment hole 4336, it corresponds to the locking state of the height adjustment mechanism 433. When the height locking member 4331 is in the first unlocked position, it disengages from the adjusting hole 4336. That is, the first engaging end 43311 of the height locking member 4331 disengages from the adjusting hole 4336, allowing the first adjusting post 431 to move relative to the second adjusting post 432. This corresponds to the unlocked state of the height adjustment mechanism 433.

The seat adjustment device 400 in this embodiment adjusts the height of the seat assembly 100 relative to the support assembly 200 (i.e., the base 5) by moving the height locking member 4331 between a first locked position and a first unlocked position, thereby fixing or allowing the first adjusting column 431 to be movable relative to the second adjusting column 432.

As shown in Figures 37 and 38, the height actuator 4332 is received in the second receiving cavity 4355. At least a portion of the height actuator 4332 is received in and movable relative to the first receiving groove 43336. Referring also to Figures 43 and 44, the height actuator 4332 is provided with a first driving groove 43321, the extension direction of which is inclined relative to the movement directions D1 and D2 of the height locking member 4331. The movement directions D1 and D2 of the height locking member 4331 are generally perpendicular to the length extension direction of the second adjusting post 432, and the movement directions D3 and D4 of the height actuator 4332 are generally parallel to the length extension direction of the second adjusting post 432. In this embodiment, the length extension direction of the second adjusting post 432 is also the axial direction of the second adjusting post 432, and the axial direction of the second adjusting post 432 is parallel to the axial direction of the first adjusting post 431. The first drive pin 4335 is connected to the height locking member 4331. The first drive pin 4335 is inserted into the first drive groove 43321 and is movable along the first drive groove 43321. In some embodiments, the movement direction of the height driving member 4332 is generally perpendicular to the height locking member 4331. Specifically, the first drive pin 4335 passes through the first drive 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 first drive groove 43321 may be provided with the height locking member 4331, and the first drive pin 4335 may be fixedly or detachably provided with the height drive member 4332.

As shown in Figures 37 and 38, a first resetting member 4334 is disposed between the height drive member 4332 and the fixed base 4333. The first resetting member 4334 is adapted to bias the height drive member 4332 to move the height locking member 4331 to the first locked position. The first resetting member 4334 can be an elastic member such as a spring or a spring sheet. In this embodiment, referring to Figure 44 as well, the height drive member 4332 forms a first resetting member receiving groove 43322 facing the first portion 43331, and at least a portion of the first protrusion 43338 extends into the first resetting member receiving groove 43322. The first resetting member 4334 is received in the first resetting member receiving groove 43322. One end of the first repositioning member 4334 abuts against the wall of the first repositioning member receiving groove 43322, and the other end abuts against the first protrusion 43338. The first repositioning member 4334 is also received in the first receiving groove 43336. In other embodiments, both ends of the first repositioning member 4334 may abut against the bottom walls of the height driving member 4332 and the second receiving cavity 4355, respectively. Referring to Figure 38, when the height locking member 4331 is operated to the first unlocking position, the first reset member 4334 is in a compressed state. Under the action of the elastic restoring force of the first reset member 4334, the height driving member 4332 can be driven to move along the D4 direction. 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 to move from the first unlocking position to the first locking position in the D1 direction, so that the first engaging end 43311 passes through the first through hole 4312 and engages with one of the adjustment holes 4336. The first reset member 4334 is configured to allow the height locking member 4331 to automatically reset from the first unlocked position to the first locked position.

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

As shown in Figure 37, the height operating member 4337 is operably disposed on the mounting base 435. When the height operating member 4337 is operated, it can switch between a first position and a 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 a first locked position to a first unlocked position via the traction member 4338. The height operating member 4337 includes a first operating part 43371 and a first connecting part 43372, with the first operating part 43371 connected to approximately the middle of the first connecting part 43372. The first connecting part 43372 is movably received in a first receiving cavity 4354. The lower cover 4352 has a first through hole 4356, through which a first operating part 43371 extends into a first receiving cavity 4354. The first operating part 43371 abuts against the side wall of the first through hole 4356 to limit the travel of the height operating member 4337. One end of the first connecting part 43372 is connected to the traction member 4338, and the other end has a second reset member receiving groove 43373 for accommodating a second reset member 4339. The opening of the second reset member receiving groove 43373 faces radially outward from the mounting base 435.

Referring to Figure 37, the second reset member 4339 is adapted to bias the height operating member 4337 to move the height operating member 4337 to the first position. The second reset member 4339 is received in the first receiving cavity 4354, and both ends of the second reset member 4339 abut against the walls of the height operating member 4337 and the first receiving cavity 4354, respectively. Specifically, one end of the second reset member 4339 abuts against the radially outer wall of the mounting base 435 of the first receiving cavity 4354, and the other end is received in the second reset member receiving groove 43373 and abuts against the bottom wall of the second reset member receiving groove 43373 to prevent the second reset member 4339 from shifting during deformation.

Referring to Figures 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 it from the first position to the second position. The height operating member 4337 drives the height driving member 4332 to move in the D3 direction (upward) via the traction member 4338, and the first driving pin 4335 is engaged through the guide groove 43333, the first driving groove 43321, and the first driving pin 4335 (see Figure). (Figures 42 and 43) The height locking member 4331 is moved in the D2 direction (outside the second adjusting column 432), causing it to move from the first locked position to the first unlocked position. This disengages the first engaging end 43311 of the height locking member 4331 from the corresponding adjusting hole 4336. At this point, 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 the desired height, that is, when the first adjusting column 431 moves to the desired height position relative to the second adjusting column 432, the first through hole 4312 aligns with another corresponding adjusting 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. The traction member 4338 relaxes, and the external force transmitted to the height drive member 4332 through the traction member 4338 is eliminated. Referring to Figure 37, the height drive 4332 moves in the D4 direction (downward) under the elastic restoring force of the first reset member 4334, and drives the height locking member 4331 in the D1 direction (inward to the inside of the second adjusting post 432) through the insertion and engagement of the first drive pin 4335 with the guide groove 43333 and the first drive groove 43321. This causes the first engaging end 43311 of the height locking member 4331 to engage with the adjusting hole 4336 aligned with the first through hole 4312, thus locking the first adjusting post 431 relative to the second adjusting post 432. This achieves the locking of the seat assembly 100 at the desired height.

The seat adjustment device 400 of this embodiment of the invention achieves height adjustment of the seat assembly 100 relative to the support assembly 200 by means of the plug-in engagement of the first adjustment column 431 and the second adjustment column 432, and by using a height adjustment mechanism 433 to restrict or release the relative movement between the first adjustment column 431 and the second adjustment column 432. The seat adjustment device 400 of this embodiment of the invention has a simple structure and is easy to operate.

In some embodiments, as shown in Figures 37 and 38, the seat adjustment device 400 further includes an anti-disengagement mechanism 438. Referring to Figures 40 and 41, the anti-disengagement mechanism 438 includes a flexible finger 4381 and an engaging groove 4382 disposed in the adjustment seat 436. Specifically, the adjustment seat 436 has a first receiving groove 4361, and the engaging groove 4382 is disposed on the side wall of the first receiving groove 4361. The extending direction of the engaging groove 4382 is substantially parallel to the extending direction of the second adjusting post 432. The lower end of the second adjusting post 432 is fixed to the bottom wall of the first receiving groove 4361. In other embodiments, the engaging groove 4382 can be provided on the base 5 of the support assembly 200. For example, without the adjustment seat 436, the engaging groove 4382 can be provided on the side wall of the receiving hole 5211 of the base 5. Referring to Figures 38 and 41, the elastic finger 4381 has a hook portion 43811, which is provided on the connecting pipe 4353. The hook portion 43811 is movable along the engaging groove 4382 and can engage with the end of the engaging groove 4382. When the first adjustment post 431 moves relative to the second adjustment post 432 in the D3 direction, the anti-disengagement mechanism 438 can prevent the end of the first adjustment post 431 from disengaging from the end of the second adjustment post 432.

The connecting pipe 4353 of the mounting base 435 is inserted into the first receiving groove 4361 of the adjusting base 436. In this embodiment, both the connecting pipe 4353 and the first receiving groove 4361 are non-circular in shape, and both include mutually abutting cross-sectional walls (not labeled in the figures). This prevents the mounting base 435 and the adjusting base 436 from rotating relative to each other.

In some embodiments, as shown in Figures 45 to 47, the rotation adjustment mechanism 437 includes a rotation locking member 4371, a rotation operating member 4372, a rotation reset member 4373, and multiple slots 4374 disposed on the base 5 of the support assembly 200. The rotation locking member 4371 is movably connected to the adjusting seat 436 so that the rotation locking member 4371 can be switched between a second locked position (also referred to as a rotation locked position) and a second unlocked position (also referred to as a rotation unlocked position). One end of the rotation locking member 4371 is a second engaging end 43711. A second receiving groove 4362 is provided on the side of the adjusting base 436 away from the second adjusting post 432. The end of the rotating locking member 4371 away from the second engaging end 43711 is accommodated in the second receiving groove 4362. Referring also to Figure 48, the adjusting base 436 is provided with a second through hole 4363 through which the rotating locking member 4371 passes. The second through hole 4363 passes through the sidewalls of the first receiving groove 4361 and the second receiving groove 4362. The rotating locking member 4371 is movably inserted through the second through hole 4363. When the rotating locking member 4371 is in the second locked position, that is, when the rotating adjustment mechanism 437 is in the locked 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 multiple slots 4374, so that the adjusting base 436 is fixed relative to the base 5. When the rotating locking member 4371 is in the second unlocked position, that is, when the rotating adjustment mechanism 437 is in the unlocked state, the second engaging end 43711 of the locking member 4371 is driven to disengage from the corresponding slot 4374, so that the adjusting base 436 can rotate relative to the base 5. In this embodiment, there are two rotary locking elements 4371, which are symmetrically arranged relative to the pivot axis R-R of the adjusting seat 436, thereby enabling the seat assembly 100 to be locked more stably in the desired position. In other embodiments not shown, the number of rotary locking elements 4371 may be one or more, and the present invention is not limited thereto.

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

In some embodiments, as shown in Figures 46 and 47, the rotating operating member 4372 is operably disposed on the base 5. The rotating operating member 4372 is movably connected to the adjusting seat 436, which is received in the receiving hole 5211 and rotatable relative to the base 5. Specifically, the adjusting seat 436 is provided with a connecting hole 4364 that penetrates the bottom wall of the second receiving groove 4362. Referring also to Figure 49, the rotating operating member 4372 is provided with connecting posts 43723. The connecting posts 43723 are inserted into the connecting holes 4364. Specifically, there are two connecting posts, and the number of connecting holes 4364 corresponds to the number of connecting posts 43723. In other embodiments, the rotating operating element 4372 may be movably connected to the second adjusting column 432.

Referring to Figure 46, the rotating operating member 4372 is provided with a second driving surface 43721. Specifically, referring to Figure 49, the rotating operating member 4372 includes a plug portion 43722, the side of which forms the second driving surface 43721. The number of plug portions 43722 corresponds to the number of rotating locking members 4371. In this embodiment, there are two plug portions 43722. The two plug portions 43722 are spaced apart from the two connecting posts 43723. In this embodiment, two plug-in portions 43722 are arranged opposite to each other, and two connecting posts 43723 are also arranged opposite to each other. The angle between the line connecting the two plug-in portions 43722 and the line connecting the two connecting posts 43723 is approximately 90 degrees. Correspondingly, referring to Figure 47, each rotary locking member 4371 is provided with a plug-in groove 43713, and the side wall of the plug-in groove 43713 forms a first driving surface 43712. The two plug-in portions 43722 and the corresponding plug-in grooves 43713 of the two rotary locking members 4371 are respectively plugged into each other, 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 extending direction of the rotary locking member 4371. In this embodiment, the movement directions D5 and D6 of the rotary locking member 4371 are substantially perpendicular to the extending direction of the second adjusting post 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 rotary operating member 4372 are substantially parallel to the extending direction of the second adjusting post 432.

As shown in Figures 46 and 47, the rotation reset member 4373 is received in the second receiving groove 4362. The rotation reset member 4373 is adapted to bias the two rotation locking members 4371 to move towards the second locked position. The rotation reset member 4373 includes elastic members such as springs and spring sheets. In this embodiment, the number of rotation reset members 4373 is one. The rotation reset member 4373 is connected between the two rotation locking members 4371, and the two ends of the adjusting seat 436 abut against the two rotation locking members 4371 respectively. Specifically, each rotation locking member 4371 has a third reset member receiving groove 43714 at the end away from the second engaging end 43711. Both ends of the rotary reset member 4373 are received in the third reset member receiving groove 43714 of the two rotary locking members 4371. In other embodiments, the number of rotary reset members 4373 may be multiple. For example, two rotary reset members 4373 may be provided corresponding to the rotary locking members 4371. One end of each rotary reset member 4373 abuts against the corresponding rotary locking member 4371, and the other end abuts against the side wall of the second receiving groove 4362.

When the seat assembly 100 needs adjustment, an external force is applied to the rotating operating member 4372, causing it to move along the D7 direction. Through the driving engagement of the first driving surface 43712 and the second driving surface 43721, the two rotating locking members 4371 move towards each other, thereby disengaging the second engaging ends 43711 of the two rotating locking members 4371 from the slots 4374. This allows the adjusting seat 436 to rotate relative to the base 5, thus enabling the seat assembly 100 to rotate relative to the base 5.

When the seat assembly 100 is rotated a certain angle (e.g., 90 degrees) to the desired position, the external force applied to the rotation operating member 4372 is released. The two rotation locking members 4371 move in opposite directions under the elastic restoring force of the rotation reset member 4373 until they reach the second locking position. This causes the second engaging end 43711 of each rotation locking member 4371 to engage with the corresponding slot 4374, thereby restricting the relative rotation between the adjusting seat 436 and the base 5, thus locking the seat assembly 100 in the desired position.

The seat adjustment device 400 of this embodiment of the invention, through a rotating adjustment mechanism 437, allows the seat assembly 100 to rotate relative to the support assembly 200 and lock in the desired position, enabling convenient adjustment of the seat assembly 100's orientation. This allows the child seat to be adjusted both in height and orientation, better meeting the usage needs of different children in various application scenarios.

In some embodiments, as shown in Figures 50 to 53, the seat assembly 100 may also be detachably connected to the mounting base 435 via a seat removal mechanism 500. As shown in Figure 40, the seat assembly 100 may include a seat 1 and a tray 12. The seat 1 includes a seat portion 111, a backrest portion 112, and two side portions 113 respectively connected to both sides of the seat portion 111. As shown in Figures 52 to 54, the seat removal mechanism 500 includes a removal locking member 541, a removal releasing member 542, a removal resetting member 543, an engaging hole 544 provided in the mounting base 435, and an engaging recess 545 provided in the mounting base 435. Referring to Figure 52, the mounting base 435 is provided with a connecting groove 4358. A locking hole 544 is located on the side wall of the connecting groove 4358 and communicates with it. A release locking member 541 is inserted into the connecting groove 4358 and can move along a direction parallel to the bottom wall of the connecting groove 4358 to achieve movement between a third position and a fourth position.

As shown in Figures 51 and 52, a disassembly locking member 541 is disposed 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 in the third position, the hook portion 5411 engages with the engagement hole 544, fixing the seat 1 relative to the mounting base 435. When the disassembly locking member 541 is in the fourth position, the hook portion 5411 disengages from the engagement hole 544, allowing the seat 1 to be separated from the mounting base 435. The number of disassembly locking elements 541 is at least two, and the number of engaging holes 544 corresponds to the number of disassembly locking elements 541. At least two disassembly locking elements 541 are evenly distributed on the side of the seat portion 111 facing the mounting base 435, so that the seat assembly 100 can be more stably fixed to the mounting base 435. The hook portions 5411 of the plurality of disassembly locking elements 541 extend in the same direction or are parallel to each other. The multiple hook portions 5411 can be the same or different in shape and size, as long as they can engage or disengage with the corresponding engaging hole 544 when the seat assembly 100 moves. In this embodiment, the number of disassembly locking members 541 is four, and the number of engaging holes 544 is also four. Specifically, the mounting base 435 has a generally rectangular top surface, and the four engaging holes 544 are located near the four apex corners of the top surface of the mounting base 435. In this embodiment, the hook portion 5411 is configured to extend rearward from the base 5412 of the disassembly locking member 541. However, in other embodiments, the hook portion 5411 may also be configured to extend forward from the base 5412 of the disassembly locking member 541. This invention does not impose any limitation on this arrangement.

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

In this embodiment, as shown in Figures 45 and 53, the seat assembly 100 further includes a stop member 1113. The stop member 1113 is generally T-shaped and includes a stop portion 1031 and a support portion 1032 connected to each other. One end of the stop portion 1031 is fixed to the middle of the generally front edge of the seat portion 111, and the other end is connected to the middle of the generally central part of the support portion 1032. The support portion 1032 abuts against and supports the underside of the tray 12. Thus, when an infant or toddler sits in the seat 1, the infant's legs extend from both sides of the stop portion 1031, and the stop portion 1031 stops the infant's hips to prevent the infant or toddler from slipping off the seat 1. The front side of the stop portion 1031 has a mounting groove 10311 communicating with the receiving hole 1014. At least the portion of the release mechanism 542 with the operating recess 5422 is located within the mounting groove 10311 for operation. In other embodiments, the operating recess 5422 may be omitted, or a pull ring or other component facilitating operation of the release mechanism 542 may be provided at the end of the release mechanism 542 away from the engaging protrusion.

As shown in Figures 53 and 54, a release repositioning member 543 is disposed between the seat assembly 100 and the release release member 542. The release repositioning member 543 is adapted to bias the release release member 542 to move the release release member 542 to a sixth locking position. The seat assembly 100 is provided with a second receiving groove 1015, and the release 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 release repositioning member 543 from shifting. The release repositioning 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 protrusion 5424 extending away from the engaging protrusion 5421. The disassembly reset component 543 is a compression spring. One end of the disassembly reset component 543 is sleeved on the second protrusion 5424, and the other end abuts against the groove wall of the second receiving groove 1015, thereby further reducing the displacement of the disassembly reset component 543 under external force.

Referring to Figures 52 and 54, in this embodiment, when the seat assembly 100 needs to be disassembled, the disassembly release member 542 is pulled up to move from the sixth locking position to the sixth releasing position, thereby allowing the disassembly lock member 541 to move relative to the mounting base 435. At this time, the disassembly release member 542 is held in the disassembly release position, and an external force along the D9 direction is applied to the seat assembly 100, causing all four disassembly lock members 541 to move simultaneously from the third position to the fourth position along the D9 direction. Each hook portion 5411 exits the engagement hole 544 along the connecting groove 4358 to release the engagement of each hook portion 5411 with the corresponding engagement hole 544, thereby allowing the seat assembly 100 to be separated from the mounting base 435. After the seat assembly 100 is separated from the mounting base 435, and the external force is removed, the release release component 542 automatically returns from the sixth release position to the sixth locked position under the elastic restoring force of the release reset component 543.

When the seat assembly 100 needs to be installed, each disassembly locking member 541 is inserted into the corresponding connecting groove 4358 and each hook portion 5411 is aligned with the corresponding engaging hole 544. At the same time, the disassembly releasing member 542 is moved from the sixth locking position to the sixth releasing position under the action of external force, such as the squeezing force of the base 5 on the engaging protrusion. The disassembly locking member 541 is held in the sixth releasing position, and the seat assembly 100 is pushed in the D10 direction, so that the disassembly locking member 541 moves in the D10 direction to the sixth locking position. At this point, the engaging protrusion 5421 of the release mechanism 542 aligns with the engaging recess 545, and the engaging protrusion 5421 is no longer subjected to the squeezing force of the base 5. Under the elastic restoring force of the release mechanism 543, the release mechanism 542 moves to the sixth locking position, thereby securing the seat assembly 100 to the mounting base 435.

In some embodiments, as shown in Figures 55 and 56, the plate 12 is connected to the seat 1 via a plate adjustment mechanism 12A. Specifically, the plate 12 is detachably connected to both sides 113 of the seat 1 and can move relative to the two sides 113. The upper edges of the two sides 113 of the seat 1 project outward to form armrests 115. In other embodiments not shown, the plate 12 may be connected to only one side 113 of the seat 1. Alternatively, the plate 12 may be connected to the seat 1 via other components, such as a connecting seat fixed to the side 113 of the seat 1. For ease of description, the connection between the plate 12 and one side 113 of the seat 1 will be described below as an example.

As shown in Figures 56 to 58, the plate adjustment mechanism 12A includes a plate release mechanism 1251, an adjustment reset mechanism 1252, and multiple position slots 1253 disposed on the side 113 of the seat 1. The multiple position slots 1253 are located below the armrest portion 115. The side of the plate 12 capable of bearing load (e.g., placing cutlery) is designated as the front face 121 (see Figure 55), and the side opposite to the front face 121 is designated as the back face 122. The plate 12 is provided with a connecting plate 123 to guide the plate 12 to move along the extending direction of the connecting plate 123. The connecting plate 123 is provided with a hole 124 for the plate release mechanism 1251 to pass through. The plate 12 also includes a limiting portion 125, which is located at one end of the connecting plate 123. The limiting portion 125 abuts against the side 113 of the seat 1 to restrict the movement of the plate 12. In this embodiment, both the connecting plate 123 and the limiting portion 125 are located on the back 122 of the plate 12. Both the connecting plate 123 and the limiting portion 125 are provided with reinforcing ribs 126 to increase their resistance to deformation.

Referring to Figure 57, the plate release mechanism 1251 has an engaging portion 12511 and a second operating portion 12512. The second operating portion 12512 protrudes from the engaging portion 12511 and extends away from the back surface 122. The plate release mechanism 1251 is movably disposed on the plate 12. Specifically, the plate release mechanism 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 travel of the plate release mechanism 1251. Referring to Figures 56 and 57, the plate release mechanism 1251 is provided with a slot 1513, and the plate 12 is provided with a connecting pin 127, which engages with the slot 1513. The connecting pin 127 is movable along the slot 1513 and abuts against the end of the slot 1513 to limit the travel of the plate release mechanism 1251. In other embodiments, the plate 12 may have the slot 1513, and the plate release mechanism 1251 may have the connecting pin 127, which engages with the slot 1513.

As shown in Figures 56 and 57, an adjusting reset member 1252 is disposed between the plate release member 1251 and the plate 12. The adjusting reset member 1252 is adapted to bias the plate release member 1251 so that the plate release member 1251 moves to the seventh locking position (also referred to as the plate locking position). Specifically, the adjusting reset member 1252 is accommodated in the slot 1513. One end of the adjusting reset member 1252 abuts against the end of the slot 1513, and the other end of the adjusting reset member 1252 abuts against the connecting pin 127. The plate release member 1251 has a seventh locking position and a seventh release position (also referred to as the plate release position). When the plate release mechanism 1251 is in the seventh locked position, the engaging portion 12511 engages with at least one of the multiple position slots 1253 to secure the plate 12 to the seat 1. Specifically, the engaging portion 12511 engages with one of the multiple position slots 1253 through the hole 124. At this time, the engaging portion 12511 and the second operating portion 12512 are located on both sides of the connecting plate 123. After the plate 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 plate 12 in the vertical direction and increasing the connection strength of the plate 12 in this direction. When the tray release mechanism 1251 is in the seventh release position, the engaging portion 12511 disengages from at least one of the plurality of position slots 1253, allowing the tray 12 to detach from the seat 1 or move relative to the seat 1. Specifically, the engaging portion 12511 disengages from the position slot 1253, allowing the tray 12 to both detach from the seat 1 and move along the connecting plate 123. In this embodiment, the connecting plate 123 extends substantially along the front-to-back direction of the child seat. The tray 12 moves substantially in the front-to-back direction. The tray release mechanism 1251 moves substantially perpendicular to the extension direction of the connecting plate 123, that is, the tray release mechanism 1251 can move substantially along the left-to-right direction of the child seat. It should be understood that "front" in this text refers to the direction the child is facing while seated in the child seat, "back" refers to the direction the child is facing away from while seated in the child seat, and "left" and "right" refer to the directions the child is facing to the left and right while seated in the child seat.

When it is necessary to adjust or remove the plate 12, the plate release parts 1251 on both sides can be pushed simultaneously, so that the plate release parts 1251 move from the seventh locked position to the seventh unlocked position, and the engaging part 12511 of the plate release parts 1251 disengages from the position groove 1253. At this time, the plate 12 can be moved along the extending direction of the connecting plate 123, or the plate 12 can be removed from the seat 1. When the plate 12 moves to the appropriate position, one of the multiple position slots 1253 aligns with the engaging part 12511. At this point, external force is released, and the plate release element 1251, under the elastic restoring force of the adjusting reset element 1252, moves from the seventh unlocking position to the seventh locking position, causing the engaging part 12511 of the plate release element 1251 to engage with the corresponding position slot 1253. This achieves position adjustment of the plate 12.

The structure of the base 5 and the support leg 6 in this third embodiment, as well as the connection relationship between the base 5 and the support leg 6, can be referred to the description in the second embodiment above. That is, this third embodiment includes the support 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 support leg 6 can be connected to the first sliding member 761 via a linkage 762. The first sliding member 761 slides vertically along a slide rail 5031 within the base 5. The first sliding member 761 is also connected to a stabilizer 763. The receiving hole 5211 in this third embodiment corresponds to the bottom center hole of the lower shell 502 in the second embodiment. The adjusting 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 adjusting seat 436 can rotate relative to the base 5 about an axis R-R. Furthermore, the bottom turntable 100a of the seat 1 in the second embodiment corresponds to the mounting base 435 in this third embodiment, and the seat 1 of the second embodiment can be rotatably connected to the base 5 via the seat adjustment device 400 in this third embodiment.

Fourth Implementation Example

This invention provides a child seat (or child chair, high chair, or chair). This child seat has multiple usage modes to suit the needs of different users, 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 the seat body) 1, a stop member 1113, and a tray 12. As shown in Figure 63, the seat 1 includes a seat portion 111, a backrest portion (also referred to as the backrest) 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. Referring also to Figure 68, the stop member 1113 is generally T-shaped and includes a stop portion 1131 and a support portion 1132 connected to each other. One end of the stop 1131 is connected to approximately the middle of the support 1132, and the stop 1131 may also be integrally formed with the support 1132. The support 1132 is connected to the bottom of the tray 12. Thus, when a child sits on the seat assembly 100, the child's legs extend from both sides of the stop 1131, and the stop 1131 stops at the child's hips to confine the child within the seating space and prevent the child from slipping off the seat assembly 100. The tray 12 is located above the support 1132 of the stop 1113 to facilitate the child's dining. The tray 12 is detachably connected to both sides 113 and can move relative to the sides 113 to allow the seat assembly 100 to accommodate children of different sizes.

When the seat assembly 100 is installed on the chair body 2000, as shown in Figure 59, the child seat is in its first usage mode, namely, high chair mode. This mode is suitable for infants and toddlers aged approximately six months to three years to eat at the same table with adults, as the infants and toddlers can sit comfortably without easily slipping off the high chair. When the seat assembly 100 is detached from the chair body 2000, as shown in Figure 60, the child seat is in its second usage mode, namely, adult chair mode, which is suitable for adults aged approximately 12 years and older. In this mode, the child seat is not limited to use as a high chair; it can also be used in various settings such as learning or play.

Specifically, as shown in Figures 59 and 60, the chair body 2000 includes a seat 822, a support assembly (also referred to as a leg assembly) 200 connected to the seat 822, and a backrest 825 connected to the seat 822. The support assembly 200 includes multiple legs (also referred to as support feet) 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 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 a third usage mode, namely, a high chair mode. This mode is suitable for infants and toddlers aged approximately six months to three years for mealtime use. Compared to the first mode, the child seat in this mode is lower and occupies less space, making it easier for infants and toddlers to get in and out of the child seat independently. It can also be easily fixed to a regular high chair. As shown in Figure 62, when the seat assembly 100 is detached from the chair body 2000 and the second leg 602 is also detached from the first leg 601, the child seat is in the fourth mode, namely the child seat mode. This mode is suitable for infants and toddlers aged approximately three to twelve years. In this mode, the child seat is not limited to use as a high chair; it can also be used in various settings such as learning or play. This embodiment of the child seat has multiple usage modes, meeting the needs of different scenarios and improving the efficiency of the child seat's use.

Of course, in other embodiments, when the user only needs to use the second and fourth usage modes, the child seat may only include the seat body 2000. Alternatively, when the user only needs to use the first and third usage modes, the child seat may include the seat assembly 100 and the seat body 2000, where the first leg 601 and second leg 602 of each support leg 6 of the seat body 2000 are non-detachably connected, or each support leg 6 is a one-piece structure. Alternatively, when the user only needs to use the third and fourth usage modes, the child seat may also include the seat assembly 100 and the seat body 2000, where each support leg 6 of the seat body 2000 includes only the first leg 601. In short, the child seat can have different configurations depending on the user's needs.

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

Referring to Figure 63, the first connector 831 is rotatably disposed on the seat assembly 100 and can be switched between a fifth locked position (also referred to as a disengaged locked position) and a fifth unlocked position (also referred to as a disengaged unlocked position). Specifically, the first connector 831 is disposed on the backrest portion 112 of the seat assembly 100. The backrest 825 is provided with a connecting hole 8251. The front side of the backrest 825 is designated as the front face 8252, and the rear side of the backrest 825 is designated as the back face 8253. When the first connector 831 is in the fifth unlocked position, the first connector 831 can move along the longitudinal direction N (see Figure 67) with the seat assembly 100. That is, the first connector 831 can pass through the connection hole 8251 from the front 8252 of the backrest 825 to the back 825 8253, or the first connector 831 can exit from the back 825 8253 of the backrest 825 to the front 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 installed on the chair body 2000, when the first connector 831 is rotated by a specific angle to the fifth locking position, the backrest 112 of the seat assembly 100 and the first connector 831 are respectively located on the front and rear sides of the backrest 825, and the first connector 831 abuts against the backrest 825. That is, the seat assembly 100 is located on the front 8252 of the backrest 825, the first connector 831 is located on the back 8253 of the backrest 825, and the first connector 831 can abut against the back 8253 of the backrest 825. At this time, since the backrest 825 is sandwiched between the first connector 831 and the backrest portion 112 of the seat assembly 100, the backrest portion 112 restricts the seat assembly 100 from moving backward relative to the backrest 825, and the first connector 831, in the fifth locking position, restricts the seat assembly 100 from moving forward relative to the backrest 825, thereby fixing the seat assembly 100 relative to the chair body 2000.

As shown in Figures 63 to 65, the backrest portion 112 of the seat assembly 100 is provided with a connecting protrusion 104 that can be inserted into a connecting hole 8251. A 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 within 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 that plane. When the connecting protrusion 104 is fully inserted into the connecting hole 8251, the end face 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, preventing the seat assembly 100 from wobbling or swaying relative to the chair body 2000 when it is fixed to the chair body 2000. In this embodiment, there are two connecting protrusions 104, two first connecting members 831, and two connecting holes 8251, making the connection between the seat assembly 100 and the chair body 2000 more stable. In other embodiments, the number of connecting protrusions 104, two first connecting members 831, and two connecting holes 8251 may be one or more.

Referring to Figures 64 to 66, a positioning protrusion 8254 is provided on the back side 8253 of the backrest 825, and a corresponding positioning recess 8311 is provided on the first connector 831. The positioning recess 8311 is located on the side of the first connector 831 facing the back side 8253 of the backrest 825. When the first connector 831 is in the fifth locked position, the positioning protrusion 8254 engages with the positioning recess 8311, thereby restricting further rotation of the first connector 831 and preventing the first connector 831 from being accidentally rotated to the fifth unlocked position. The first connector 831 is made of a material with a certain amount of elastic deformation, such as plastic. This allows the first connector 831 to deform when operated, allowing it to rotate between the fifth locked position and the fifth unlocked position over the positioning protrusion 8254. In other embodiments, a positioning recess 8311 may be provided on the back surface 8253 of the backrest 825, and a corresponding positioning protrusion 8254 may be provided on the first connector 831. The present invention does not limit this. Referring to Figures 64 and 65, a recess 8255 is provided on the back surface 8253 of the backrest 825. 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 flat. 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. A positioning protrusion 8254 is disposed on the bottom wall of the recess 8255. In this embodiment, there are two first connecting members 831, which are symmetrically distributed on the backrest 825 of the seat assembly 100. In other embodiments, there may be one or more first connecting members 831. The present invention does not limit the number of first connecting members 831.

As shown in Figures 63 and 67, a second connector 832 is disposed on the seat assembly 100. Specifically, the second connector 832 is disposed at 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 removal mechanism 800 includes two second connectors 832, which are disposed at a forward position on 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 forward edge of the seat plate 822 engages with the connecting groove 8321. The connection between the second connector 832 and the seat plate 822 makes the connection between the seat assembly 100 and the chair body 2000 more stable.

When it is necessary to install the seat assembly 100 onto the chair body 2000, rotate the first connector 831 to the fifth unlock position, engage the connecting groove 8321 of the second connector 832 with the front side of the seat plate 822, and make the first connector 831 completely pass through the connecting hole 8251 (see Figure 6). At this time, rotate the first connector 831 to the fifth locking position, and the first connector 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 connector 831 engages with the positioning protrusion 8254 of the backrest 825, so that the first connector 831 is fixed in the fifth locking position. When it is necessary to detach the seat assembly 100 from the chair body 2000, an external force can be applied to the first connecting member 831, causing it to rotate. Simultaneously, the positioning recess 8311 and the positioning protrusion 8254 separate, and the first connecting member 831 is further rotated to the fifth unlocked position. At this point, the seat assembly 100 can be moved, causing the first connecting member 831 to disengage from the connecting hole 8251, and simultaneously separating the connecting groove 8321 from the seat plate 822, thereby achieving the disassembly of the seat assembly 100.

Furthermore, as shown in Figures 68 to 72, the support assembly 200, in addition to the multiple legs 6 mentioned above, also includes a leg seat (also called a footrest or base) 6212, a foot pedal 6213 movably connected to the multiple legs 6, and a second sliding member 6214 slidably connected to the multiple legs 6. The multiple legs 6 are hinged to the leg seat 6212. The leg seat 6212 is connected to the seat plate 822, and the multiple legs 6 are configured to pivot relative to the seat plate 822 to allow the chair body 2000 to switch between a high position and a low position. The high position refers to the seat plate 822 of the chair body 2000 being relatively far from the ground or its support surface, and the low position refers to the seat plate 822 of the chair body 2000 being relatively close to the ground or its support surface. The foot pedal 6213 is movably connected to multiple support legs 6. Specifically, each support leg 6 is provided with a second sliding member 6214, and the foot pedal 6213 is hinged to multiple second sliding members 6214. In this embodiment, the second sliding member 6214 is, for example, a sliding sleeve, each sliding sleeve being fitted over a corresponding support leg 6 and capable of sliding relative to the support leg 6, and the foot pedal 6213 is hinged to multiple sliding sleeves respectively. A reinforcing member 62131 is provided near the position where the foot pedal 6213 is hinged to the sliding sleeve to enhance the strength of the connection of the foot pedal 6213, thereby enhancing the strength of the foot pedal 6213. The foot pedal 6213 can move between a first position and a second position to drive the multiple support legs 6 to rotate.

Referring to Figure 59, when the footrest 6213 is in the first position, the multiple legs 6 are relatively far apart, and the chair body 2000 is in a low position. Referring also to Figure 60, when the footrest 6213 is in the second position, the multiple legs 6 are relatively close together, and the chair body 2000 is in a high position. The footrest 6213 is closer to the seat 822 in the first position than it is in the second position; that is, the second position of the footrest 6213 is lower than its first position. Thus, when the child seat switches from the first usage mode shown in Figure 59 to the second usage mode shown in Figure 60, the footrest 6213 can move from the first position to the second position, making it suitable for taller users to place their feet. Simultaneously, the height of the seat 822 also increases accordingly, improving user comfort. The same applies when switching the child seat from the second usage mode shown in Figure 60 to the first usage mode shown in Figure 59.

As shown in Figures 68 to 71, at least one of the plurality of support legs 6 is provided with a first limiting member 6215, which is located between the second sliding member 6214 and the seat plate 822. The first limiting member 6215 is adapted to abut against the second sliding member 6214 to restrict the foot pedal 6213 from continuing to slide upward from the first position. At least one of the plurality of support legs 6 is provided with a second limiting member 6216, which is adapted to abut against the second sliding member 6214 to restrict the foot pedal 6213 from continuing to slide downward from the second position. The first limiting member 6215 is located above the second limiting member 6216. The second sliding member 6214 can move between the first limiting member 6215 and the second limiting member 6216, thereby allowing the chair body 2000 to switch between a low position and a high position. This enables height adjustment of the child seat, allowing it to meet different usage needs in various scenarios and further improving its utilization rate.

As shown in Figures 68 to 72, there are four support legs 6, and four corresponding second sliding members 6214 are provided. Each of the four second sliding members 6214 is connected to a foot pedal 6213. For ease of description, one support leg 6 is used as an example. Each support leg 6, in addition to the first support leg 601 and the second support leg 602 mentioned above, also includes a connecting joint 62113 and a mounting member 62114. The support leg seat 6212 is provided with a joint receiving groove 62122, which faces the support leg 6 and is capable of accommodating at least a portion of the connecting joint 62113. The connecting joint 62113 is rotatable relative to the joint receiving groove 62122. The leg support 6212 has a limiting hole 62123 that penetrates the bottom wall of the joint receiving groove 62122. A mounting member 62114 is located on the side of the leg support 6212 away from the leg 6 and is connected to the connecting joint 62113 by fasteners such as bolts. The mounting member 62114 has a limiting protrusion 621141, at least a portion of which is received within the limiting hole 62123. When the connecting joint 62113 rotates, the limiting protrusion 621141 abuts against the side wall of the limiting hole 62123, thereby limiting the rotational stroke of the connecting joint 62113, and consequently limiting the rotational stroke of the leg 6. This also limits the high and low positions 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. Alternatively, the first leg 601 and the second leg 602 are connected by means such as snap-fit or threaded connection. In this embodiment, both the first leg 601 and the second leg 602 are metal tubes with a hollow inner cavity 62115. A first limiting member 6215 is provided on the first leg 601, and a second limiting member 6216 is provided on the second leg 602. The connecting joint 62113 is made of plastic, for example. A foot (also called a foot pad) 603 is provided at the 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 outrigger 603 is made of, for example, plastic, which reduces noise from friction between the outrigger 6 and the ground or supporting surface.

When the child seat is in the first usage mode as shown in Figure 59 or the second usage mode as shown in Figure 60, the support leg 603 is connected to the second support leg 602. When the child seat is in the third usage mode as shown in Figure 61 or the fourth usage mode as shown in Figure 62, the support leg 603 can be detached from the second support leg 602 and connected to the first support leg 601 (as shown in Figures 61 and 62).

Furthermore, as shown in Figures 69, 71, and 72, the chair body 2000 also includes a folding mechanism (also referred to as a retracting mechanism) 923. The folding mechanism 923 is used to lock the second slider 6214 in a first position or a second position. When the folding mechanism 923 is in the locked state, it can lock the second slider 6214 relative to the plurality of legs 6; when the folding mechanism 923 is in the unlocked state, the second slider 6214 can slide relative to the plurality of legs 6. For example, when the second slider 6214 is in the first position and the folding mechanism 923 is in the locked state, the chair body 2000 is locked in a low position. When the folding mechanism 923 is in the unlocked state (the second slider 6214 can be in either the first or second position), the second slider 6214 can slide between the first and second positions, allowing the chair body 2000 to freely switch between a high and a low position. Specifically, when the folding mechanism 923 is in the locked state, the folding mechanism 923 engages with the second slider 6214, preventing the second slider 6214 from sliding relative to the support leg 6, thereby restricting the footrest 6213 to the first position. When the folding mechanism 923 is in the unlocked state, it disengages from the second slider 6214, allowing the second slider 6214 to slide relative to the support leg 6, thereby enabling the foot pedal 6213 to move freely between the first and second positions.

Referring to Figures 68 and 70, there are two folding mechanisms 923, symmetrically arranged on the support assembly 200, allowing the foot pedal 6213 to be more stably locked in the first position. In other embodiments, the number of folding mechanisms 923 may be one, two, or three. The present invention is not limited in this regard. For ease of explanation, the following description uses one folding mechanism 923 as an example.

In this embodiment, the folding mechanism 923 is disposed on the upper part of the support legs, thereby locking the chair body in a low-positioned state. In other embodiments not shown, the folding mechanism 923 may also be disposed on the lower part of the support legs, thereby locking the chair body in both a low-positioned and high-positioned state separately.

In some embodiments, as shown in Figures 69, 71, and 72, the folding mechanism 923 includes a locking member 9231, a drive member 9232, a fixing seat 9233, a folding reset member 9234, a folding operation member 9235, and a traction member 9236. The folding operation member 9235 is connected to the drive member 9232 via the traction member 9236, and the drive member 9232 is drivenly connected to the locking member 9231. The fixing seat 9233 is fixedly disposed on the support leg 6. Specifically, the fixing seat 9233 is housed within the hollow cavity 62115 of the first support leg 601 and is connected to the first support leg 601 together with a first limiting member 6215 disposed outside the hollow cavity 62115 via fasteners such as bolts.

In this embodiment, the folding mechanism 923 includes two locking components 9231, two driving components 9232, two fixing seats 9233, two folding reset components 9234, two traction components 9236, and one folding operation component 9235. The two locking components 9231, two driving components 9232, two fixing seats 9233, and two folding reset components 9234 are respectively disposed in two adjacent support legs 6. One end of each of the two traction components 9236 is connected to one of the two driving components 9232, and the other end of each is connected to the folding operation component 9235. Thus, a single retraction actuator 9235 can simultaneously control the movement of the drive components 9232 within both support legs 6, thereby controlling the movement of the locking component 9231, and making the locking of the foot pedal 6213 more stable.

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

The structure is explained below using the folding mechanism's folding operation component 9235 and the engaging component 9231, driving component 9232, fixing base 9233, folding reset component 9234, and traction component 9236 disposed in one of the support legs 6 as examples.

As shown in Figures 69 and 71, the fixing base 9233 is provided with a guide groove 92331. The guide groove 92331 extends parallel to the movement direction of the drive member 9232, that is, the guide groove 92331 extends parallel to the length direction of the first leg 601. The engaging member 9231 is movable between a fourth locked position (also referred to as a retracted locked position) and a fourth unlocked position (also referred to as a retracted unlocked position). At least a portion of the engaging member 9231 is accommodated in the hollow cavity 62115 of the first leg 601. One end of the engaging member 9231 is connected to the fixing base 9233. Specifically, the fixing base 9233 is provided with a first receiving groove 92332, and the guide groove 92331 is disposed on the side wall of the first receiving groove 92332. One end of the engaging member 9231 is inserted into the first receiving groove 92332 and connected to the drive pin 9237. Specifically, the engaging member 9231 is provided with a drive groove 9239, the extension direction of which is intersecting but not perpendicular to the movement direction M1 of the engaging member 9231, that is, the extension direction of the drive groove 9239 is inclined relative to the movement direction of the engaging member 9231. The drive pin 9237 is inserted into the drive groove 9239 and also into the guide groove 92331 of the fixing base 9233. The drive pin 9237 can move along the guide groove 92331. This arrangement allows the engaging member 9231 to move along the extension direction of the first receiving groove 92332, preventing the engaging member 9231 from shifting 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 through which the engaging end 92311 passes. 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 inserted into the engaging hole 9238 of the second slider 6214. When the engaging member 9231 is in the fourth unlocked position, the engaging end 92311 of the engaging member 9231 disengages from the engaging hole 9238, allowing the second sliding member 6214 to move relative to the support leg 6.

In this embodiment, the chair body 2000, by moving the engaging member 9231 between a fourth locked position and a fourth unlocked position, allows the second sliding member 6214 to be fixed or movable relative to the support leg 6, thereby selectively locking the footrest 6213 to the first position, that is, selectively locking the chair body 2000 in a low position.

As shown in Figures 69 and 71, the drive member 9232 is received in the hollow cavity 62115 of the first leg 601. The fixing seat 9233 is provided with a second receiving groove 92333, and at least a portion of the drive member 9232 is received in and movable relative to the second receiving groove 92333. The drive member 9232 is connected to a drive pin 9237. In this embodiment, the direction of movement M2 of the drive member 9232 is approximately parallel to the extension direction of the first leg 601, and the direction of movement M1 of the engaging member 9231 is approximately perpendicular to the extension direction of the first leg 601. The drive pin 9237 is inserted into and can move along the drive groove 9239. Specifically, the drive pin 9237 passes through the drive groove 9239 and the guide groove 92331, achieving a drive connection between the engaging member 9231 and the drive member 9232. In other embodiments not shown, the drive member 9232 may have a drive groove 9239, and the drive pin 9237 may be fixedly or detachably mounted on the engaging member 9231. The movement direction M2 and the movement direction M1 are substantially perpendicular.

As shown in Figures 69 and 71, a retractable repositioning member 9234 is disposed between the drive member 9232 and the fixed base 9233. The retractable repositioning member 9234 is adapted to bias the drive member 9232 to drive the engaging member 9231 to move to the fourth locking position. The retractable repositioning member 9234 can be an elastic member such as a spring or a spring sheet. In this embodiment, referring to Figures 59 and 71, a portion of the drive member 9232 received in the second receiving groove 92333 forms a boss 92321. The retractable repositioning member 9234 is received in the second receiving groove 92333. One end of the retractable repositioning member 9234 abuts against the side wall of the second receiving groove 92333, and the other end of the retractable repositioning member 9234 is sleeved on the boss 92321. This design prevents the retractable locking component 9234 from shifting during deformation.

As shown in Figures 69, 71, and 72, the retraction operation member 9235 is operably disposed on the leg base 6212. Specifically, the retraction operation member 9235 is operably disposed on the side of the leg base 6212 opposite to the seat plate 822, that is, the retraction operation member 9235 is operably disposed on the lower side of the leg base 6212. One end of the traction member 9236 is housed in the hollow cavity 62115 of the first leg 601 and connected to the drive member 9232, while the other end of the traction member 9236 extends out of the hollow cavity 62115 of the first leg 601 and is connected to the retraction operation member 9235. The traction member 9236 is, for example, a steel cable, carbon fiber cable, or other drive cable. When the retraction actuator 9235 is activated, it moves the drive member 9232 via the traction member 9236, thereby moving the locking member 9231 from the fourth locked position to the fourth unlocked position. When the external force applied to the retraction actuator 9235 is released, under the elastic restoring force of the retraction reset member 9234, the drive member 9232 drives the retraction actuator 9235 back to its initial position via the traction member 9236.

Referring to Figures 68 and 69, when the footrest 6213 is in the first position, the engaging hole 9238 of the second slider 6214 is opposite to the through hole 62116 of the support 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 the locked state, the second slider 6214 cannot slide relative to the support leg 6, the footrest 6213 is locked in the first position, that is, the chair body 2000 is locked in the low position. When the height of the chair body 2000 needs to be adjusted, the operating mechanism 9235 is moved to drive the drive component 9232 upward along the M2 direction via the traction component 9236, and the engaging component 9231 is moved from the fourth locking position to the fourth unlocking position along the M1 direction via the driving pin 9237 and the driving groove 9239, so that the engaging end 92311 of the engaging component 9231 is released from the engaging hole 9238 (see Figure 71). At this time, an external force is applied to the foot pedal 6213, causing it to move to the second position. When the foot pedal 6213 moves to the point where the second sliding member 6214 no longer contacts the engaging member 9231, the external force applied to the retracting operation member 9235 is released. Under the elastic restoring force of the retracting reset member 9234, the drive member 9232 moves downward along the M2 direction. On the one hand, the drive member 9232 drives the retracting operation member 9235 to the initial position through the traction member 9236; on the other hand, the drive pin 9237 drives the engaging member 9231 to reset to the second locking position along the M1 direction through the cooperation of the drive pin 9237 and the drive groove 9239. Since the through hole 62116 is misaligned with the engaging hole 9238 at this time, the drive pin 9237 cannot engage with the engaging hole 9238. Therefore, the second sliding member 6214 can move relative to the support leg 6, meaning the footrest 6213 can move relative to the support leg 6. When the footrest 6213 moves to the appropriate position, that is, when the chair body 2000 is adjusted to the required height, the external force applied to the footrest 6213 is released. The footrest 6213 is fixed in this appropriate position (this appropriate position can be, for example, the second position, or any position between the first and second positions) under its own weight and the friction between the second sliding member 6214 and the support leg 6.

In some embodiments, as shown in Figures 73 to 75, the base plate 822 includes a first base plate 8221 and a second base plate 8222. The first base plate 8221 is provided with a first receiving groove 82211. The second base plate 8222 is disposed at the opening of the first receiving groove 82211. Specifically, the first base plate 8221 and the second base plate 8222 are fixedly connected. The second base plate 8222 is disposed around the support leg seat 6212 of the support assembly 200. The opening of the first receiving groove 82211 faces the support leg seat 6212, that is, the first base plate 8221 is located above the support leg seat 6212. In this embodiment, the first base plate 8221 and the second base plate 8222 are connected by fasteners such as bolts. In other embodiments, the first base plate 8221 and the second base plate 8222 are detachably connected, for example, by snap-fit or threaded connection. In this embodiment, the leg base 6212 has a disc-shaped structure, the second base plate 8222 has an annular structure surrounding the leg base 6212, and the first base plate 8221 has a disc-shaped structure that can cover the leg base 6212 and the second base plate 8222.

Referring to Figure 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 Figure 75, the first receiving groove 82211 has an annular first sidewall 82212 and an annular second sidewall 82213 surrounding the first sidewall 82212. The second sidewall 82213 is further away from the axis of rotation R-R of the seat plate 822 than the first sidewall 82212. The leg seat 6212 is provided with a rotating connection 62124, at least a portion of which is received in the first receiving groove 82211 and abuts against the first sidewall 82212 of the first receiving groove 82211, so that the seat plate 822 can rotate relative to the leg seat 6212 about the axis of rotation R-R. 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 base plate 8222 and the first side wall 82212. At least a portion of the rotatable connector 62124 passes through the opening 82223 and engages with the first side wall 82212 of the first receiving groove 82211. In other embodiments not shown, the rotatable connector 62124 may abut against the second side wall 82213 of the first receiving groove 82211. In still other embodiments not shown, the rotatable connector 62124 may also engage with the second base plate 8222 through the opening 82223. The present invention is not limited in this respect.

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

As shown in Figures 73 to 75, the rotation adjustment mechanism 924 includes a positioning member 9241, a positioning reset member 9242, and a positioning operation member 9243. The positioning operation member 9243 is drivenly connected to the positioning member 9241. The support leg 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 the locked state, the positioning member 9241 is in the third locked position, and the positioning member 9241 is simultaneously engaged with the first positioning groove 9244 and the second positioning groove 9245. That is, a part of the first positioning member 9241 is accommodated in the first positioning groove 9244, and the other part of the positioning member 9241 is accommodated in the second positioning groove 9245, so that the seat plate 822 cannot rotate relative to the support leg seat 6212, thereby locking the seat plate 822 at the required 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, allowing the seat plate 822 to rotate relative to the leg seat 6212, thereby adjusting the angle of the seat plate 822 relative to the leg seat 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, allowing the seat plate 822 to rotate relative to the leg seat 6212, thereby adjusting the angle of the seat plate 822 relative to the leg seat 6212.

As shown in Figures 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. 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 approximately "+" shaped, so that the seat plate 822 can be locked relative to the support leg seat 6212 at four angular positions, with each pair of adjacent angular positions spaced 90 degrees apart. The "+" shaped positioning portion 92411 can be formed, for example, by two intersecting rectangles, or by, for example, two intersecting ellipses. In other embodiments not shown, the positioning part 92411 may also be formed by a rectangle or an ellipse, or by three or more intersecting rectangles or three or more intersecting ellipses. In other embodiments not shown, the cross-section of the positioning part 92411 may also be a regular polygon, such as an equilateral triangle, a regular quadrilateral, or a regular hexagon. The present invention does not limit the specific shape of the cross-section of the positioning part 92411. Those skilled in the art can select a suitable cross-sectional shape of the positioning part 92411 according to the required positioning angle. For example, if six angular positions are required, the cross-section of the positioning part 92411 can be selected as three intersecting rectangles or ellipses, or a single regular hexagon. The shapes and dimensions of the first positioning groove 9244, the second positioning groove 9245, and the positioning part 92411 correspond respectively.

As shown in Figure 75, a positioning actuation member 9243 is operably disposed on the support leg base 6212. The positioning actuation member 9243 is located on the side of the support leg base 6212 opposite to the first positioning groove 9244, and is drivenly connected to the positioning member 9241 by a fastener 9249, such as a bolt. When operated, the positioning actuation member 9243 can move the positioning member 9241 via the fastener. 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 travel of the positioning member 9241, and thus limiting the travel of the positioning actuation member 9243.

As shown in Figure 75, the positioning reset member 9242 is adapted to bias 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 disposed between the positioning member 9241 and the support leg seat 6212. Specifically, referring to Figure 73, the positioning member 9241 has a positioning connection portion 92412. The positioning portion 92411 is disposed around the positioning connection portion 92412 and is symmetrical about the rotation axis R-R of the seat plate 822. The positioning connector 92412 has a third receiving groove 92413 formed on the side facing the support leg 6212, and a protrusion 92441 is provided at the bottom of the first positioning groove 9244. One end of the positioning reset member 9242 is sleeved on the protrusion 92441 and abuts against the bottom of the first positioning groove 9244, while the other end of the positioning reset member 9242 abuts against the bottom of the third receiving groove 92413. This arrangement prevents the positioning reset member 9242 from shifting during deformation. When the positioning operating member 9243 is pulled downward, the positioning member 9241 is driven downward and compresses the positioning reset member 9242, causing the positioning member 9241 to disengage from the second positioning groove 9245. When the tension 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, engaging with the second positioning groove 9245, and thus moves the positioning operating member 9243 upward.

In other embodiments not shown, the positioning reset member 9242 may also be disposed between the base 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 upwards, the positioning member 9241 is driven upwards and compresses the positioning reset member 9242, causing the positioning member 9241 to disengage 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 downwards to a locked state engaging with the second positioning groove 9245, and drives the positioning operating member 9243 downwards.

In some embodiments, as shown in Figures 75 to 77, the positioning actuation member 9243 is rotatable relative to the leg support 6212. The end face of the leg support 6212 facing the positioning actuation member 9243 is provided with a positioning rib 62121, and the positioning actuation member 9243 is correspondingly provided with a retaining rib 92431. The retaining rib 92431 is operable to abut against the positioning rib 62121 to keep the rotation adjustment mechanism 924 in the unlocked state, thereby allowing the seat plate 822 of the chair body 2000 to rotate freely for use by older children or adults. Specifically, the positioning rib 62121 is provided with an abutting end 62121a and an inclined surface 62121b. The inclined surface 62121b is connected to the abutting end 62121a and the lower end face of the support leg seat 6212, respectively. This allows the positioning operating member 9243 to move along the inclined surface 62121b to abut the abutting end 62121a when it is rotated, 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 to prevent the positioning operating member 9243 from rotating excessively and misaligning with the abutting end 62121a, thus 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 opposite direction, causing the retaining rib 92431 to be misaligned with the abutment end 62121a and the inclined surface 62121b, that is, the retaining rib 92431 to be misaligned with the positioning rib 62121, thereby switching the rotation adjustment mechanism 924 to the locked state. In this embodiment, the number of positioning ribs 62121 is at least two, for example, three, four, six, etc. At least two positioning ribs 62121 are symmetrically distributed with respect to the rotation axis R-R of the base plate 822. Correspondingly, the number of retaining ribs 92431 is at least two, for example, three, four, six, etc. At least two retaining ribs 92431 are rotationally symmetrically distributed R-R relative to the rotation axis of the base plate 822.

In some embodiments, as shown in Figures 73 and 75, the support assembly 200 further includes a roller 6217. The roller 6217 is disposed on and rotatable relative to the leg seat 6212. At least a portion of the seat plate 822 rolls in contact with the roller 6217. In this embodiment, the outer surface of the first sidewall 82212 of the first receiving groove 82211 rolls in contact with the roller 6217. This arrangement assists in the rotation of the seat plate 822 relative to the leg seat 6212. Specifically, roller 6217 has a first inclined surface 62171, and seat plate 822 is provided with a second inclined surface 82214 surrounding the rotation axis R-R of seat plate 822. The second inclined surface 82214 rolls in 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 with respect to the rotation axis R-R of seat plate 822.

The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

The embodiments described above merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

1000: High chair; 100: Seat assembly; 13: Backrest; 1: Seat; 110: First elongated hole; 32: Second axis; 151: Hole; 15: Cover; 2111: Slide; 211: Connecting arm; 212: Side plate; 21: Adjusting element; H2: Second horizontal direction; 31: First axis; 271: Support; 27: Support seat; V: Vertical direction; 6: Leg; 601: Upper leg; 602: Lower leg; 603: Support foot; 7: Folding mechanism; 5: Base; 200: Support assembly; 14: Footrest; 2: Height adjustment mechanism; 11: Side wall; 12: Dinner plate; 16: Safety belt

Claims (10)

A chair includes a seat assembly and a support assembly, the seat assembly providing a seating position for a user and supported by the support assembly, the support assembly including a plurality of legs and a folding mechanism, the folding mechanism being configured to open or fold the plurality of legs while the height of the seating position relative to the plurality of legs remains constant, wherein: the folding mechanism includes: an adjustable seat; a plurality of connectors mounted on the adjustable seat, and at least one second locking member; wherein the adjustable seat is slidably connected to the plurality of legs via the plurality of connectors; 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 adjustable seat and the at least one leg. The chair as claimed in claim 1, wherein the at least one of the legs is provided with two or more locking slots, the two or more locking slots being spaced apart along the length of the at least one leg to selectively engage with the at least one second locking member. The chair as claimed in claim 1, wherein: the chair further includes a second release member, the second release member being mounted on the adjusting seat and operably connected to the at least one second locking member; and/or each of the connecting members having a slot, each of the legs being provided with a slide rail, each of the connecting members being slidably connected to the slide rail on the corresponding leg through its slot. A chair includes a seat assembly and a support assembly. The seat assembly provides a seating position for a user and is supported by the support assembly. The support assembly includes multiple legs and a folding mechanism configured to open or fold the multiple legs while the seating position maintains a constant height relative to the multiple legs. The support assembly includes a base having a slide rail extending vertically. The multiple legs are respectively connected to the base. The folding mechanism includes: a first slider that slidably engages with the slide rail; and multiple linkages connected between the first slider and the multiple legs. When the first slider moves along the slide rail, the multiple linkages drive the multiple legs to simultaneously open or fold. The chair as claimed in claim 4, wherein the folding mechanism further comprises: a stabilizer connected to the first sliding member via at least one connector to allow the stabilizer to move with the first sliding member in the vertical direction; the stabilizer having a rotation axis parallel to the vertical direction; and at least one first motion conversion mechanism disposed between the stabilizer and the base; each of the first motion conversion mechanisms drives the stabilizer to rotate relative to the first sliding member about the rotation axis when the stabilizer moves in the vertical direction. The chair as claimed in claim 5, wherein: 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 disposed in 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 hooks extending from the stabilizer or the first sliding member, each of the hooks extending in the vertical direction. The chair as claimed in claim 5, wherein each of the first motion conversion mechanisms includes: a first drive groove disposed on one of the base and the stabilizer; and a first drive pin disposed on the other of the base and the stabilizer and slidably engaging with the first drive groove. A chair includes a seat and a support assembly, the seat being adapted to provide a seating position for a user and supported by the support assembly, the support assembly including a plurality of legs and a folding mechanism configured to open or fold the plurality of legs while the seating position is maintained at a constant height relative to the plurality of legs, wherein: the support assembly is mounted on the seat, and the plurality of legs are configured to pivot relative to the seat to allow the chair to switch between a high position and a low position; The support assembly also includes a foot pedal, which is movably connected to the plurality of support legs. The foot pedal can move between a first position and a second position and drive the plurality of support legs to rotate. When the foot pedal is in the first position, the plurality of support legs are extended, placing the chair in a low position. When the foot pedal is in the second position, the plurality of support legs are folded, placing the chair in a high position. The chair as claimed in claim 8, wherein each of the legs is provided with a second slide member, the second slide member being connected to the footrest member such that the footrest member can slide together with the second slide member between the first position and the second position. The chair as described in claim 9, wherein: the folding mechanism includes: an engaging member movably disposed on at least one of the plurality of legs, the engaging member being switchable between a fourth locked position and a fourth unlocked position; and an engaging hole disposed on the second sliding member; when the folding mechanism is in the locked state, the engaging member is in the fourth locked position, the engaging member engaging with the engaging hole to lock the second sliding member relative to the legs; when the folding mechanism is in the unlocked state, the engaging member is in the fourth unlocked position, the engaging member disengaging from the engaging hole.