CN222646096U

CN222646096U - Vehicles

Info

Publication number: CN222646096U
Application number: CN202420593399.8U
Authority: CN
Inventors: 易小龙; 吴海涛; 汪尔学
Original assignee: China Wonderland Nurserygoods Co Ltd
Current assignee: China Wonderland Nurserygoods Co Ltd
Priority date: 2023-03-31
Filing date: 2024-03-25
Publication date: 2025-03-21
Anticipated expiration: 2034-03-25
Also published as: CN118722825A

Abstract

The present utility model relates to a carrier. The vehicle comprises a back rest assembly, a vehicle frame, a seat assembly and a connecting rod assembly, wherein the vehicle frame can be switched between a folding state and a unfolding state, the seat assembly is movably arranged on the vehicle frame, the connecting rod assembly is respectively and movably connected with the vehicle frame, the seat assembly and the back rest assembly, and the back rest assembly can be driven to fold in the direction approaching to the seat assembly through the connecting rod assembly when the vehicle frame is switched from the unfolding state to the folding state.

Description

Carrier tool

Technical Field

The utility model relates to a carrier, a handrail mounting unit and a height adjusting mechanism.

Background

Carriers, such as child carts, child dining chairs, child tricycles, and the like, are increasingly being used in homes where there is a need. There are several problems with current commercial vehicles. Taking the child cart as an example for explanation, in order to facilitate storage and transportation, the frame of the child cart mostly has a folding function, but the folding mechanism is complex in operation and inconvenient to use. In addition, the back rest is easily moved in a direction approaching the seat frame by a pushing force during folding of the frame. Some push hand frames of the stroller can be reversed back and forth to facilitate the user to take care of the child, but the seat assembly can be moved during the reversing process of the stroller frame back and forth, so that the angle adjustment between the seat assembly and the backrest assembly is changed, which makes the adjustment difficult for the user. The child stroller is generally provided with a handrail body detachably connected with the handrail rod, and the structure of the detachable connection between the handrail body and the handrail rod is complex at present. The utility model discloses a children's shallow etc. carrier can be equipped with the running-board, because the difference of different riders ' both legs length and sitting posture often need to remove the adjustment to the running-board, especially adjusts in the direction of height to reduce the pressure that the legs of riders bore, improve and take the comfort level, but current altitude mixture control mechanism often has a complicated structure, and the operation is inconvenient, is difficult to satisfy consumer's demand.

Disclosure of utility model

The first aspect of the utility model provides a carrier, which comprises a backrest component, a frame, a seat component and a connecting rod component, wherein the frame can be switched between a folding state and a unfolding state, the seat component is movably arranged on the frame, and the connecting rod component is respectively and movably connected with the frame, the seat component and the backrest component. When the frame is switched from the unfolding state to the folding state, the connecting rod assembly can drive the backrest assembly to fold in the direction approaching to the seat assembly.

In some embodiments, the link assembly includes a first link having a first movable portion movably connected with the seat assembly and a first pivot portion pivotally connected with the frame, and a second link having a second movable portion movably connected with the first link and a second pivot portion pivotally connected with the back assembly.

In some embodiments, the frame includes a seat tube extending in a front-rear direction of the carrier, the seat assembly includes a movable frame slidably disposed on the seat tube, and the first movable portion is movably connected with the movable frame.

In some embodiments, the movable frame is provided with a connecting part, the connecting part is provided with a guide groove, and the first movable part is inserted into the guide groove and can move along the guide groove.

In some embodiments, the guide groove includes a first groove portion and a second groove portion that communicate with each other, the first groove portion extending along a moving direction of the movable frame, the second groove portion extending in a direction intersecting with the extending direction of the first groove portion.

In some embodiments, the guide slot has a first end and a second end, the first movable portion is located at the first end when the frame is in the unfolded state, and the first movable portion is located at the second end when the frame is in the folded state.

In some embodiments, the connecting portion is provided with a notch, the guide groove is provided on and penetrates one side groove wall or two opposite side groove walls of the notch, and the first movable portion extends into the connecting portion through the notch and is connected to the guide groove in a sliding manner.

In some embodiments, the frame includes a push handle frame pivotally connected to the seat tube, the push handle frame being operable to rotate relative to the seat tube to switch the direction of travel of the carrier between a first direction of travel and a second direction of travel, the push handle frame driving the movable frame to move along the seat tube in the first direction of travel and/or the first link to move in the second direction of travel when the direction of travel of the carrier is switched from the first direction of travel to the second direction of travel.

In some embodiments, the movable frame has a clamping portion, and when the frame is in the unfolded state, the clamping portion is in clamping fit with the second movable portion, and in the rotation reversing process of the hand pushing frame, the clamping portion is out of matching with the second movable portion.

In some embodiments, the first link has a driving slot, the driving slot is located between the first movable portion and the first pivoting portion, and the second movable portion is inserted into the driving slot and can slide along the driving slot.

In some embodiments, the backrest assembly includes a first backrest frame, a second backrest frame, and a backrest tube, a first end of the first backrest frame being pivotally connected to the second pivot portion of the second link, a second end of the first backrest frame being pivotally connected to the first end of the second backrest frame, a second end of the second backrest frame being pivotally connected to the first end of the backrest tube, a second end of the backrest tube, a portion of the second link between the second movable portion and the second pivot portion, and the movable frame being pivotally connected by a first connecting shaft.

In some embodiments, the second connecting rod includes a first rod portion and a second rod portion that are connected to each other, the first rod portion and the second rod portion form an included angle with each other, the second movable portion is located at an end portion of the first rod portion that is far away from the second rod portion, the second pivot portion is located at the second rod portion, and the first connecting shaft is located at a connection portion between the first rod portion and the second rod portion.

In some embodiments, the backrest assembly further comprises a connecting strap and strap adjuster, the connecting rod assembly is disposed on the left and right sides of the frame, one end of the connecting strap is connected with the end of the second rod portion on one side of the frame, which is far away from the first rod portion, the other end of the connecting strap is connected with the end of the second rod portion on the other side of the frame, which is far away from the first rod portion, by bypassing the side of the backrest tube, which is far away from the seat assembly, and the other end of the connecting strap is connected with the end of the second rod portion on the other side of the frame, which is far away from the first rod portion, and the strap adjuster is disposed on the connecting strap and used for adjusting the length of the connecting strap.

In some embodiments, the back assembly further comprises a limiting tab pivotally connected between the back tube and the second link via the first connecting shaft.

In some embodiments, the frame includes a pushing frame and an auxiliary frame movably connected to the pushing frame, the link assembly is pivoted to the auxiliary frame, and the pushing frame is operable to fold the frame by driving the pushing frame, and to fold the backrest assembly in a direction approaching to the seat assembly by driving the link assembly by the auxiliary frame and the seat assembly.

The second aspect of the utility model provides a carrier, which comprises a foldable frame, a limiting block, a movable frame and a backrest frame, wherein the limiting block is arranged on the frame and provided with a telescopic part, the movable frame is arranged on the frame, and the backrest frame is arranged on the frame and provided with a movable end. When the frame is switched from the unfolded state to the folded state, the backrest frame rotates in a first direction to be close to the movable frame, the telescopic part is suitable for abutting against the movable end to apply a force for rotating the backrest frame in a second direction, and the first direction is opposite to the second direction.

In some embodiments, the stopper further comprises a body portion secured to the frame. The telescopic part comprises a sliding block and an elastic resetting piece, wherein the sliding block is in sliding fit with the body part and is used for abutting against the movable end, and the elastic resetting piece is clamped between the body part and the sliding block.

In some embodiments, the body portion has a guide groove, the telescopic portion is mounted in the guide groove, and the slider is elastically telescopic with respect to a notch of the guide groove under the action of the elastic restoring member.

In some embodiments, the bottom of the notch of the guide groove is provided with an extension supporting part protruding outwards, and/or the upper part of the notch of the guide groove is provided with a limit protrusion.

In some embodiments, a limiting mechanism is disposed between the slider and the body portion, the limiting mechanism being configured to limit a sliding travel of the slider. The limiting mechanism comprises a limiting hole, a limiting lug and a limiting lug, wherein the limiting hole is arranged on one of the groove wall of the guide groove and the sliding block, the limiting lug is arranged on the other one of the groove wall of the guide groove and the sliding block, and the limiting lug is in sliding fit with the limiting hole.

In some embodiments, the body portion has a first end surface that abuts the movable end to limit rotation of the back rest frame when the frame is in the deployed state.

In some embodiments, the first end surface is located above the telescopic part, and/or a limit protrusion is formed at a junction of an end surface of the notch of the guide groove and the first end surface.

In some embodiments, the stopper further comprises a body portion secured to the frame. The expansion and contraction part is arranged on the body part and can elastically deform.

In some embodiments, the mobile frame is movably disposed on the frame. When the frame is in a unfolding state, the movable end is suitable for being clamped between the limiting block and the movable frame. When the frame is switched to the folding state, the movable frame moves to a direction far away from the limiting block so as to allow the backrest frame to rotate.

In some embodiments, the frame comprises a seat tube, the limiting block is fixed on the seat tube, the movable frame is in sliding fit with the seat tube, and the back rest frame is pivoted to the movable frame. The frame also comprises a pushing handle frame and a linkage assembly, wherein the rotation of the pushing handle frame drives the movable frame to move along the seat tube through the linkage assembly.

In some embodiments, the linkage assembly comprises a link mechanism and a pin, the link mechanism comprises a first link and a second link, the first link and the pushing frame are sleeved on the pin, the second link is pivoted with the movable frame, and the pushing frame drives the first link to rotate through the pin when rotating. The limiting block further comprises a body part, a hole is formed in the body part, and the pin-joint pin penetrates through the hole to limit relative movement between the limiting block and the seat tube.

A third aspect of the utility model provides a vehicle comprising a frame, a seat assembly mounted on the frame and movable relative thereto in a fore-aft direction, a backrest assembly mounted on the seat assembly and angularly adjustable relative thereto, a push handle pivotally mounted on the frame and driving movement of the seat assembly relative thereto in a fore-aft direction of the frame when pivoted relative thereto, and a linkage disposed on one side of the seat assembly and connected thereto, the linkage providing the same range of angular adjustment of the backrest assembly relative thereto when the seat assembly is in the first and second positions.

In some embodiments, the backrest assembly includes a backrest tube having a bottom portion pivotally connected to the seat assembly and a strap having an end portion connected to the linkage, the backrest tube being supported on the strap. The linkage is also coupled to the seat assembly and causes the end of the belt to move synchronously with the seat assembly in the fore-aft direction of the frame.

In some embodiments, the linkage includes a linkage rod, a first end of the linkage rod is connected to the seat assembly, a second end of the linkage rod is connected to the end of the strap, and the seat assembly moves the end of the strap in the fore-aft direction of the frame via the linkage rod when the seat assembly moves in the fore-aft direction of the frame.

In some embodiments, the frame includes two lateral frames and a seat tube mounted between the two lateral frames. The seat assembly includes a movable frame mounted to the seat tube, the push frame, when pivoted relative to the frame, driving the movable frame to move relative to the seat tube in a fore-aft direction of the frame. The first end of the linkage rod is connected to the movable frame, the second end of the linkage rod is movably connected to the side frame along the front-back direction of the frame, and when the movable frame moves relative to the seat tube along the front-back direction of the frame, the movable frame drives the end part of the strap to move along the front-back direction of the frame through the linkage rod.

In some embodiments, the linkage rod is disposed between the movable frame and the lateral frame, a side of the movable frame facing the linkage rod is provided with a recess in which a first end of the linkage rod is received.

In some embodiments, a side of the linkage rod facing the movable frame is provided with a first protrusion, and the recess of the movable frame is provided with a groove or a through hole therein, and the first protrusion is received in the groove or the through hole.

In some embodiments, a second protruding portion is disposed on a side, away from the linkage rod, of the movable frame, and the linkage mechanism further includes an elastic member, one end of the elastic member is disposed around the second protruding portion, and the other end of the elastic member is hooked on a side, away from the movable frame, of the linkage rod.

In some embodiments, the backrest assembly includes a backrest tube having a bottom portion pivotally connected to the seat assembly and a strap having an end portion connected to the linkage, the backrest tube being supported on the strap. The linkage mechanism includes a transmission assembly and a slider movably mounted to the frame in a front-rear direction of the frame and connected with the end portion of the strap. The transmission assembly is respectively connected with the pushing handle frame and the sliding piece, and can convert rotation of the pushing handle frame into movement of the sliding piece along the front-back direction of the frame, so that the end part of the strap and the seat assembly synchronously move along the front-back direction of the frame.

In some embodiments, the sliding piece comprises a sliding part and a connecting part, the connecting part is connected with the transmission assembly, the sliding part is fixedly connected with the end part of the binding band, and the transmission assembly drives the sliding part to move along the front-back direction of the frame through the connecting part.

In some embodiments, the transmission assembly includes a linkage gear, a tooth is disposed on the sliding member, the hand pushing frame is fixedly connected with a pivot shaft penetrating through the frame, the pivot shaft is connected with the linkage gear and can drive the linkage gear to rotate, the linkage gear is meshed with the sliding member, and the sliding member can move along the front-back direction of the frame due to rotation of the linkage gear.

In some embodiments, the transmission assembly further comprises a driven gear and an output gear, the linkage gear being engaged with the slider via the driven gear, and the driven gear being engaged with the slider via the output gear.

In some embodiments, the linkage mechanism further includes a traction member and a driving wheel, the driving wheel is sleeved on the pivot shaft and can rotate along with the pivot shaft, the traction member is respectively connected with the driving wheel and the linkage gear, and the driving wheel can drive the linkage gear to rotate through the traction member when rotating.

In some embodiments, the traction member is a cable, one end of the cable is fixed at a first position of the linkage gear, the other end of the cable extends to the driving wheel and bypasses the driving wheel and then extends back to the linkage gear and is fixed at a second position opposite to the first position, and a part of the cable wound on the driving wheel is also fixed at a certain position of the driving wheel, and when the driving wheel rotates, the lengths of the cable parts on two sides of the driving wheel and the linkage gear change, so that the linkage gear also rotates.

In some embodiments, a cavity is provided in the frame, the carrier further includes a mounting seat, the mounting seat is disposed in the cavity, the mounting seat includes a housing, a baffle is disposed on an inner wall of the housing, the baffle divides the housing into a first accommodating space and a second accommodating space, the sliding portion of the sliding member is disposed in the first accommodating space and is slidably disposed on the baffle, and the transmission assembly is disposed in the second accommodating space. The mounting seat further comprises a cover body, the cover body is mounted on the shell body and defines the second accommodating space together with the shell body, the transmission assembly is arranged between the cover body and the shell body, one end of the connecting portion stretches out of the cover body after crossing over the upper end of the cover body, an opening is formed in the cover body, and the transmission assembly is connected with the connecting portion through the opening.

In some embodiments, the frame comprises two lateral frames, the seat assembly is mounted between the two lateral frames, the lateral frames are provided with sliding grooves extending in the front-rear direction of the frame, the end portions of the straps are slidably mounted to the sliding grooves, and the linkage mechanism enables the end portions of the straps to slide in the front-rear direction of the frame in the sliding grooves when the push handle frame pivots relative to the frame.

In some embodiments, the backrest assembly includes a backrest tube having a bottom portion pivotally connected to the seat assembly and a strap having an end portion connected to the linkage, the backrest tube being supported on the strap. The linkage mechanism comprises a guide piece and a connecting piece, wherein the guide piece is attached to the frame, the end part of the strap passes through the guide piece and then is connected with the connecting piece, the connecting piece is connected with the seat assembly and can move along the front-back direction of the frame along with the seat assembly, so that the backrest tube is driven by the strap to synchronously move along with the seat assembly, and the connecting piece is a single connecting piece or is integrally formed with the strap.

The fourth aspect of the utility model provides a handrail installation unit, which comprises a first connecting seat, a first magnetic attraction piece, a second connecting seat and a second magnetic attraction piece, wherein the first connecting seat is provided with a clamping part, the first magnetic attraction piece is arranged on the first connecting seat, the second connecting seat is provided with a clamping piece, and the second magnetic attraction piece is arranged on the second connecting seat. The first connecting seat and the second connecting seat are detachably connected through the detachable clamping of the clamping part and the clamping piece and the magnetic adsorption of the first magnetic attraction piece and the second magnetic attraction piece.

In some embodiments, the second connecting seat has a first accommodating space and an insertion hole communicated with the first accommodating space, and the clamping piece comprises at least one elastic arm located in the first accommodating space. The card matching part is suitable for entering or exiting the first accommodating space through the inserting hole. The clamping part is provided with at least one clamping groove, and the at least one clamping groove is used for being detachably clamped with the at least one elastic arm.

In some embodiments, the card matching part comprises a protrusion, and the at least one clamping groove is arranged on the protrusion. The protrusion is suitable for extending into the second connecting seat so as to allow the at least one clamping groove to be clamped with the at least one elastic arm.

In some embodiments, the first connecting seat is provided with a stop table, and the stop table is non-rotatably sleeved in the insertion hole. The protrusion is arranged on the anti-rotation table, the first connecting seat is provided with a first accommodating cavity, the first accommodating cavity is positioned in the protrusion, and the first magnetic attraction piece is arranged in the first accommodating cavity.

In some embodiments, the at least one snap groove comprises an annular groove disposed on an outer peripheral wall of the protrusion. The at least one elastic arm comprises two elastic arms which are oppositely arranged and form a second accommodating space for accommodating the protrusion, and the two elastic arms hold the annular groove when the protrusion is positioned in the second accommodating space.

In some embodiments, a support is disposed in the first accommodating space of the second connecting seat, the first ends of the two elastic arms are connected through a fixing portion, the fixing portion is fixed to the support, the second ends of the two elastic arms are opposite and spaced, the support is provided with a spacer, the spacer is close to the first ends of the two elastic arms and is located between the two elastic arms, and the spacer is suitable for being abutted to the two elastic arms.

In some embodiments, the second connecting seat is further provided with a lock release piece and an elastic reset piece, wherein the lock release piece is operatively connected with the clamping piece and is used for pushing the at least one elastic arm to be out of clamping with the at least one clamping groove, and the elastic reset piece is used for driving the lock release piece to reset.

In some embodiments, the release lock has at least one pushing portion, the at least one elastic arm has at least one abutting portion, and each pushing portion is adapted to push the corresponding abutting portion, so that the at least one elastic arm is disengaged from the at least one engagement groove.

In some embodiments, a boss is disposed in the accommodating space, the boss has a guiding surface opposite to the abutting portion, the pushing portion is sandwiched between the guiding surface and the abutting portion, and the pushing portion has a sliding surface slidably engaged with the guiding surface.

In some embodiments, the first connecting seat comprises a connecting body and a mounting seat, wherein the mounting seat is mounted on the connecting body through a fastening mechanism or is integrated with the connecting body into a whole. The card distribution part is arranged on the mounting seat. The connecting body is integrally formed with or attached to the grab rail. The second connecting seat is pivoted with the armrest body through a pivot, and the axial direction of the pivot is perpendicular to the inserting and pulling direction of the clamping part.

In a fifth aspect the utility model provides a height adjustment mechanism for a vehicle comprising a forefoot support assembly, a foot pedal slidable in a height direction along the forefoot support assembly, and a locking assembly provided between the forefoot support assembly and the foot pedal, the locking assembly being switchable between a locked state and a unlocked state, the foot pedal being fixable in a height position relative to the forefoot support assembly when the locking assembly is in the locked state and/or the foot pedal being operable to move in a first direction, the foot pedal being operable to move in the first direction or a second direction when the locking assembly is in the unlocked state, the first direction and the second direction being opposite and both parallel to the height direction.

In some embodiments, the locking assembly comprises a first locking groove arranged on the front foot supporting assembly, wherein the first locking groove is a one-way locking groove used for limiting the pedal plate to move towards the second direction, and/or a second locking groove arranged on the front foot supporting assembly, the second locking groove is a two-way locking groove used for limiting the pedal plate to move towards the first direction and the second direction, and a locking piece is movably arranged at one end of the pedal plate, the locking piece can be switched between a locking position and a unlocking position, when the locking piece is in the locking position, the end part of the pedal plate, which extends out of the first locking groove or the second locking groove, is inserted and matched, and when the locking piece is in the unlocking position, the locking piece is disengaged from the first locking groove or the second locking groove.

In some embodiments, the locking assembly further comprises an operating member operatively disposed between the foot pedal and in driving connection with the locking member, the operating member being operable to drive the locking member from the locking position to the unlocking position, a linkage member having a first end drivingly connected to the operating member and a second end fixedly connected to the locking member, the operating member being operable to drive the locking member from the locking position to the unlocking position via the linkage member, a first return member disposed between the operating member and the foot pedal, the first return member being for a second return member disposed between the locking member and the foot pedal, the second return member being for biasing the locking member to move the locking member toward the locking position.

In some embodiments, the first locking groove has a first push slope therein, the first push slope gradually sloping toward the foot pedal along the first direction. The two ends of the second locking groove along the height direction are respectively provided with a first limiting side wall and a second limiting side wall. The second locking groove is located in a first direction of the first locking groove.

In some embodiments, the foot pedal has a hollow cavity, the locking member and the linkage member are movably disposed in the hollow cavity, a portion of the operation member extends into the hollow cavity to be connected with the linkage member, and another portion of the operation member extends out of the hollow cavity to be operated. The part of the operating piece, which stretches into the hollow inner cavity, is provided with a driving groove, the extending direction of the driving groove is staggered with the moving direction of the operating piece and the moving direction of the locking piece, and the first end of the linkage piece is inserted into the driving groove and can move along the driving groove. The operation piece is internally provided with a mounting cavity communicated with the hollow cavity, and the first reset piece is arranged between the top of the hollow cavity and the bottom of the mounting cavity and can elastically stretch out and draw back.

In some embodiments, a first boss is disposed on a portion of the hollow inner cavity of the foot pedal, a second boss opposite to the first boss is disposed around the locking member, the second boss is located on a side of the first boss, which is close to the forefoot supporting component, and the second resetting member is sleeved outside the locking member, and two ends of the second resetting member respectively abut against the first boss and the second boss.

In some embodiments, the forefoot support assembly includes a forefoot support bar of a frame of the vehicle and a guide member fixed to a side of the forefoot support bar facing the footboard, the locking assembly being disposed between the guide member and the footboard.

In some embodiments, the forefoot support assembly is provided with a guide groove extending along the moving direction of the pedal plate, and the pedal plate comprises a pedal body for bearing feet of a user and a clamping piece integrally formed with the pedal body. The clamping piece is at least partially inserted into the guide groove and can slide along the guide groove.

In some embodiments, the height adjusting mechanism further comprises a clamping piece arranged between the front foot supporting component and the pedal, the clamping piece is in telescopic connection or movable connection with the pedal, and the front foot supporting component is provided with a guide groove extending along the moving direction of the pedal. The clamping piece comprises a clamping body and a connecting part which are connected with each other and are arranged at an included angle, the clamping body is at least partially inserted into the guide groove and can slide along the guide groove, a notch is formed in one end of the pedal, and the connecting part is inserted into the notch.

In some embodiments, the locking assembly includes a third locking groove provided in the forefoot support assembly and located in a second direction of the first locking groove, the third locking groove having a second push ramp that gradually slopes toward the foot pedal along the first direction, the third locking groove further having a mounting opening opposite the second push ramp. The locking piece can be inserted into the third locking groove through the mounting opening.

In some embodiments, the height adjusting mechanism further includes a limiting member connected to the guide member and located in the second direction of the third locking groove, and when the locking member is inserted into the third locking groove, the foot board abuts against the limiting member to limit the foot board to move in the second direction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

Fig. 1 schematically shows a perspective view of a vehicle according to a first aspect of the utility model, with the vehicle in an unfolded state;

FIG. 2 schematically illustrates an exploded view of the carrier illustrated in FIG. 1;

FIG. 3 schematically illustrates a perspective view of the linkage assembly in the carrier of FIG. 1 at an angle;

FIG. 4 schematically illustrates a perspective view of the linkage assembly in the carrier of FIG. 1 at another angle;

FIG. 5 schematically illustrates a perspective view of a stopper in the carrier illustrated in FIG. 1;

FIG. 6 schematically illustrates a perspective view of the carrier of FIG. 1 in a state between an extended state and a collapsed state;

FIG. 7 schematically illustrates a cross-sectional view of the carrier of FIG. 1 in a further state between an expanded state and a collapsed state, and

Fig. 8 schematically shows a perspective view of the carrier shown in fig. 1 in a collapsed state.

FIG. 9 is a schematic structural view of a vehicle according to a second aspect of the present utility model, in which a frame is in a deployed state;

FIG. 10 is an exploded view of the carrier of FIG. 9;

FIG. 11 is a schematic structural view of the vehicle of FIG. 9 and a partial enlarged view of a portion of the seat assembly and the link assembly;

FIG. 12 is a schematic view of the vehicle of FIG. 9 with the front foot support, rear foot support and wheel assemblies omitted;

FIG. 13 is an exploded view of the carrier of FIG. 12 at A;

FIG. 14 is a side cross-sectional view of the vehicle of FIG. 9 and an enlarged partial view of a portion of the seat assembly, link assembly and back assembly with the frame in an extended condition and the connecting straps in a first length;

FIG. 15 is a side cross-sectional view of the vehicle illustrated in FIG. 9 and an enlarged partial view of a portion of the seat assembly, the link assembly and the back assembly with the frame in an extended condition and the connecting straps in a second length;

FIG. 16 is a schematic structural view of the vehicle of FIG. 15 after reversing the push handle and a partial enlarged view of a portion of the seat assembly, link assembly and back assembly;

FIG. 17a is a side cross-sectional view of the vehicle of FIG. 9 and an enlarged view of a portion of the seat assembly, link assembly and back assembly with the frame in a collapsed condition;

FIG. 17b is another angular view of the carrier of FIG. 17a in a collapsed state;

Fig. 18 is a schematic perspective view of a carrier according to a first embodiment of a third aspect of the present utility model in a first use state;

Fig. 19 is a schematic perspective view of a carrier in a second use state according to a first embodiment of a third aspect of the present utility model;

fig. 20 is a schematic perspective view of a carrier according to a first embodiment of a third aspect of the present utility model after removing a front foot support and a rear foot support;

FIG. 21 is a partially exploded view of a vehicle according to a first embodiment of a third aspect of the present utility model after removal of the forefoot and rearfoot supports;

FIG. 22 is an enlarged view of a portion of FIG. 21;

FIG. 23 is a partially exploded view of a vehicle according to a first embodiment of a third aspect of the present utility model, with the front and rear foot supports removed;

FIG. 24 is an enlarged view of a portion of FIG. 23;

fig. 25 is a schematic perspective view of a carrier according to a second embodiment of a third aspect of the present utility model;

FIG. 26 is a side cross-sectional view of a carrier of a second embodiment of a third aspect of the present utility model;

FIG. 27 is an enlarged view of a portion of FIG. 26;

FIG. 28 is a schematic view of the cable of FIG. 27 with some internal details removed;

Fig. 29 is a side view of a mount of a carrier according to a second embodiment of the third aspect of the present utility model when mounted in a grab rail;

Fig. 30 is a schematic perspective view of a mounting base of a carrier and components mounted therein according to a second embodiment of a third aspect of the present utility model.

FIG. 31 is an exploded schematic view of a mount of a carrier vehicle and components mounted therein according to a second embodiment of a third aspect of the present utility model;

FIG. 32 is an exploded view of a mount of a carrier and another view of components mounted therein according to a second embodiment of a third aspect of the present utility model;

fig. 33 is a schematic perspective view of a carrier according to a third embodiment of a third aspect of the present utility model;

Fig. 34 is a partial enlarged view of fig. 33.

Fig. 35 schematically shows a perspective view of a carrier provided according to a fourth aspect of the present utility model, to which is applied a handrail-mounting unit provided according to the fourth aspect of the present utility model;

Fig. 36 schematically illustrates a perspective view of the armrest body and frame of the vehicle illustrated in fig. 35, separated;

FIG. 37 schematically illustrates a partial cross-sectional C-C view of the vehicle illustrated in FIG. 35, with the first and second connection seats of the armrest mounting unit connected together;

Fig. 38 schematically illustrates a view in which the first and second connection seats illustrated in fig. 20 are separated from each other;

Fig. 39 schematically shows an exploded view of a first connection socket of the armrest mounting unit provided in accordance with a fourth aspect of the present utility model;

fig. 40 schematically shows a further exploded view of a first connection socket of a handrail mounting unit provided according to a fourth aspect of the utility model;

Fig. 41 schematically shows an exploded view of a second connection socket of the armrest mounting unit provided in accordance with a fourth aspect of the present utility model;

fig. 42 schematically shows a further exploded view of a second connection socket of the armrest mounting unit provided in accordance with a fourth aspect of the present utility model, and

Fig. 43 schematically illustrates a D-D partial cross-sectional view of the carrier illustrated in fig. 35.

FIG. 44 is a schematic view of a carrier according to a fifth aspect of the present utility model;

FIG. 45 is a schematic view of a height adjustment mechanism in the carrier shown in FIG. 44;

FIG. 46 is a cross-sectional view taken along line A-A of FIG. 45 and a cross-sectional view of a dashed circled portion;

FIG. 47 is a cross-sectional view taken along line B-B of FIG. 45 with a broken line circled;

FIG. 48 is a cross-sectional view of the vehicle of FIG. 44, taken along line C-C, with the foot pedal and locking assembly omitted;

FIG. 49 is a schematic view showing a height adjusting mechanism according to a fifth aspect of the present utility model;

FIG. 50 is a top view of a foot pedal in the height adjustment mechanism shown in FIG. 49;

Fig. 51 is an exploded view of a foot pedal in the height adjustment mechanism shown in fig. 49.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides a carrier which can be a child carrier, such as a child cart, a child dining chair, a child tricycle and the like, and also can be a wheelchair, a high chair and the like.

Unless explicitly specified and limited otherwise, the terms of orientation such as "front", "rear", "left", "right", etc. in the various embodiments of the present utility model are based on the "front", "rear", "left", "right" orientation of the child carrier in the unfolded state and with the child facing forward, and the "front", "rear" orientation is schematically illustrated by arrow P, Q, and the "left", "right" orientation is schematically illustrated by arrow L, R. These directional terms are used only to make the description of the embodiments of the present utility model clearer and are not used to unduly limit the scope of the present utility model.

First aspect

Fig. 1 shows a perspective view of a vehicle 1000 according to a first aspect of the utility model in an unfolded state, and fig. 2 shows an exploded view of the vehicle. As shown in fig. 1 and 2, the vehicle is illustrated as a child vehicle such as a stroller, which may include a frame 100, a seat assembly 200, a backrest assembly 400, and the like. In this embodiment, the structure of the child carrier is substantially bilaterally symmetrical about a longitudinal middle plane (not shown in the drawings, the longitudinal middle plane may also be referred to as a bilateral symmetry plane). Of course, in some alternative embodiments, such as child carriers with asymmetric braking systems, the child carrier may not be entirely side-to-side symmetrical in structure.

Fig. 1 and 2 illustrate an exemplary embodiment of a frame 100. The frame 100 includes, for example, seat tubes 110, push arms 120, armrest frames 130, auxiliary frames 140, connector frames 150, front foot support frames 160, and rear foot support frames 170. The frame 100 is foldable, the folded state of the frame 100 corresponds to the folded state of the child carrier, and the unfolded state of the frame 100 corresponds to the unfolded state of the child carrier. Of course, in alternative embodiments, other embodiments of the frame 100 are possible and are not limited to the examples herein.

The structure of the frame 100 according to the first aspect of the present utility model will be described with reference to fig. 1 and 2.

The frame 100 includes two seat tubes 110 on the left and right sides, each seat tube 110 extending generally forward and rearward. The seat assembly 200 includes a movable frame 220 mounted on each seat tube 110, the movable frame 220 on the same side being in sliding engagement with the seat tube 110. The seat assembly 200 further includes a seat frame 230 connected between the two movable frames 220, the seat frame 230 for directly or indirectly supporting the buttocks of the child (through the seat cushion).

The hand pushing frame 120 is generally U-shaped and includes a first hand pushing rod 122 and a second hand pushing rod 123 disposed at the left and right sides, and an upper end of the first hand pushing rod 122 and an upper end of the second hand pushing rod 123 are connected through a hand pushing body 121. In some embodiments, the extension length of the pusher body 121 relative to the respective pusher bars (the first pusher bar 122 and the second pusher bar 123) may be adjustable. Each hand lever is pivotally connected to the same side of the seat tube 110 via a pivot shaft 630.

The armrest frame 130 includes, for example, a first armrest rod 132 and a second armrest rod 133 on both left and right sides, and the front end of the first armrest rod 132 and the front end of the second armrest rod 133 are connected by an armrest body 131. The armrest body 131 is attached to each armrest rod (the first armrest rod 132 and the second armrest rod 133), for example, in a detachable or non-detachable manner.

The frame 100 may include, for example, two auxiliary frames 140 and two connection frames 150 on left and right sides. Each auxiliary frame 140 is pivotally connected to the same side of the grab bar, specifically by a pivot 93. Each of the connection frames 150 is pivotally connected to the auxiliary frame 140 on the same side, specifically, through a pivot shaft 630.

The front foot support 160 of the frame 100 includes, for example, a first front foot support 161 and a second front foot support 162 on the left and right sides, and a front rail (or foot rest) 163 is connected between the first front foot support 161 and the second front foot support 162. The rear foot supporting frame 170 includes a first rear foot supporting rod 171 and a second rear foot supporting rod 172 which are symmetrically arranged left and right, and a rear cross rod 173 is connected between the first rear foot supporting rod 171 and the second rear foot supporting rod 172. The front wheel assemblies 181 are respectively mounted to the lower ends of the respective front foot support rods (the first front foot support rod 161 and the second front foot support rod 162). Rear wheel assemblies 182 are respectively mounted to lower ends of the respective rear foot support bars (the first rear foot support bar 171 and the second rear foot support bar 172). The grab bar, the front foot support bar and the rear foot support bar on the same side are pivoted through a pivot 92, and the front foot support bar and the seat tube 110 on the same side are pivoted through a pivot 91. The same side link 150 and the rear foot support bar are pivotally connected by pivot 94. The connection between the right side members of the child carrier of the first aspect of the present utility model is described in detail below in connection with fig. 1 and 2. Since the structure of the child carrier is substantially bilaterally symmetrical, the connection relationship of the left side member of the child carrier may be referred to as the connection relationship of the right side member described below.

The same side forefoot support bar is pivotally connected to the seat tube 110 by a pivot 91. Specifically, the front end of the right seat tube 110 is provided with a hole 1101, and the middle of the second forefoot support bar 162 is provided with a hole 1601. The seat tube 110 is pivotally connected to the second forefoot support bar 162 by a pivot 91 that extends through holes 1101 and 1601. The second forefoot support bar 162 has a hole 1602 at its upper end, the second rearfoot support bar 172 has a hole 1702 at its upper end, and the second grab bar 133 has a hole 1301 at its front end. The second grab bar 133, the second forefoot support bar 162, and the second rearfoot support bar 172 are pivotally connected by a pivot 92 penetrating through the holes 1301, 1602, 1702. The rear end of the second grab bar 133 is provided with a hole 1302 and the upper end of the auxiliary frame 140 is provided with a hole 1402. The second grab bar 133 and the auxiliary frame 140 are pivoted by a pivot 93 penetrating the holes 1302 and 1402. The rear end of the seat tube 110 is provided with a hole 1102, the lower end of the auxiliary frame 140 is provided with a hole 1401, the upper end of the connection frame 150 is provided with a hole 1502, and the lower end of the second hand pushing rod 123 is provided with a hole 1201. The seat tube 110, the auxiliary frame 140, the connecting frame 150, and the second hand pushing rod 123 are pivoted by a pivot shaft 630 penetrating the holes 1102, 1401, 1502, 1201. The lower end of the connection frame 150 is provided with a hole 1501 and the middle of the second rear foot support bar 172 is provided with a hole 1701. The link 150 and the second rear leg support bar 172 are pivotally connected by a pivot 94 that extends through holes 1501 and 1701.

Referring to fig. 1, the frame 100 is maintained in a unfolded state by a relative rotation between the locking auxiliary frame 140 and the link frame 150. On the contrary, when the child carrier needs to be folded, the frame 100 can be folded integrally by rotating the push handle 120 after the relative rotation between the lock release auxiliary frame 140 and the connecting frame 150 is needed.

Referring to fig. 1 and 2, an exemplary embodiment of a fold-locking mechanism 700 for locking relative rotation between the auxiliary frame 140 and the link frame 150 is also shown in this embodiment. Specifically, a slide groove 1403 extending in the longitudinal direction of the auxiliary frame 140 is provided on the auxiliary frame 140, and a lock pin 730 is slidably provided in the slide groove 1403, the lock pin 730 being adapted to slide along the slide groove 1403 between the holes 1401 and 1402. A locking groove 1503 is formed in the coupling frame 150. When the vehicle frame 100 is switched from the folded state to the unfolded state, the auxiliary frame 140 and the connecting frame 150 rotate relatively about the pivot shaft 630. When the child carrier is switched to the deployed state, locking groove 1503 is aligned with sliding groove 1403 and locking pin 730 may be inserted into locking groove 1503 under the urging of the resilient return member inside auxiliary frame 140. At this time, the locking pin 730 is simultaneously positioned in the sliding groove 1403 and the locking groove 1503, thereby locking the relative rotation between the auxiliary frame 140 and the connection frame 150, and maintaining the child carrier in the unfolded state. In some embodiments, the locking pin 730 comprises, for example, a locking portion 731 for sliding engagement with the sliding groove 1403 and for insertion into the locking groove 1503, and a first abutment 732, for example, protruding laterally with respect to the locking portion 731.

Referring to fig. 1 and 2, an exemplary implementation of an operating mechanism for relative rotation between the lock release aid 140 and the link 150 is also shown in this embodiment. Specifically, the first operating member 710 is mounted on the push handle body 121, and the first operating member 710 may be a button, for example. A first slider 740 is provided on each of the hand levers (the first hand lever 122 and the second hand lever 123), and each of the first sliders 740 is slidably engaged with the corresponding hand lever (the first hand lever 122 or the second hand lever 123). The first operating members 710 are connected to respective first sliders 740, for example, by traction members (not shown in the drawing, such as ropes) inside the pusher frame 120, and each of the first sliders 740 has a second pushing portion 741 protruding laterally. When the frame is in the unfolded state, the second pushing portion 741 is located below the first pushing portion 732 on the same side. When the vehicle frame 100 needs to be folded, the first operating member 710 is pressed, and the first operating member 710 drives the first slider 740 to move upwards, and the first slider 740 drives the locking pin 730 to withdraw from the locking groove 1503 through the abutment of the second abutment portion 741 and the first abutment portion 732, i.e. the relative rotation between the lock assistance frame 140 and the connection frame 150 is released. In some embodiments, an elastic restoring member may be disposed in each of the pushing levers (the first pushing lever 122 and the second pushing lever 123), and when the pressing of the first operating member 710 is released, the elastic restoring member may push the corresponding first slider 740 to restore, and the first operating member 710 also restores.

Referring to fig. 1 and 2, an exemplary implementation for positioning the pusher arm 120 is also shown in this embodiment. Specifically, the second slider 920 is provided on each of the pushing levers (the first pushing lever 122 and the second pushing lever 123), and each of the second sliders 920 is provided with an engagement groove 921. Each auxiliary frame 140 is provided with a first engaging block 930, and each forefoot supporting rod (the first forefoot supporting rod 161 and the second forefoot supporting rod 162) is provided with a second engaging block 940. When the push handle 120 rotates back and forth about the pivot shaft 630, the first engagement block 930 of the auxiliary frame 140 and the second engagement block 940 of the forefoot support bar are selectively engaged in the engagement groove 921, so that the push handle 120 is positioned at a first backward inclined position (the state shown in fig. 1, the first engagement block 930 of the auxiliary frame 140 is engaged in the engagement groove 921), or at a second forward inclined position (not shown in the drawing, the second engagement block 940 of the forefoot support bar is engaged in the engagement groove 921). The switching of the push handle 120 between the first position tilted back and the second position tilted forward corresponds to the reversing of the push handle 120. When the push handle 120 is in the first position, a child seated in the child carrier faces forward in the travel direction and away from a caregiver pushing the push handle 120. When the push handle 120 is in the second position, a child seated in the child carrier faces rearward of the travel direction and faces a caregiver pushing the push handle 120.

Each second slider 920 is in sliding engagement with a corresponding push rod 122, 123. The inner sides of the two push rods 122, 123 are also provided with a second operating member 910. The second operating member 910 is coupled to the second slider 920, for example, by a second pulling member (not shown, e.g., a cord) inside the push rods 122, 123. When the second operating member 910 is operated, the second slider 920 can be driven by the second traction member to slide upwards along the pushing rods 122 and 123, and at this time, the engagement groove 921 of the second slider 920 can be disengaged from the first engagement block 930 or the second engagement block 940. At this time, the pushing frame 120 is rotated to align and engage the engagement groove 921 of the second slider 920 with the second engagement block 940 or the first engagement block 930, so that the front-back direction of the pushing frame 120 can be completed. An elastic restoring member for restoring the corresponding second slider 920 may be further provided inside each of the pushing bars 122 and 123.

In another embodiment (not shown), the traction member connected between the first operating member 710 and the first slider 740 is connected to the second slider 920, for example, at the same time. When the reversing push handle 120 is needed, the first operating member 710 is pressed, and the traction member pulls the second slider 920 to move upward, that is, the engagement groove 921 of the second slider 920 is easily released from engagement with one of the first engagement block 930 and the second engagement block 940. Then, the pushing handle 120 is turned, so that the engagement groove 921 of the second slider 920 aligns with and engages with the other of the first engagement block 930 and the second engagement block 940. An elastic reset member for resetting the corresponding second slider 920 may be provided in each push rod.

In the embodiment in which the first operating member 710 is simultaneously coupled to the first slider 740 and the second slider 920, when the first operating member 710 is pressed, the first slider 740 also moves upward to drive the locking pin 730 to release the lock. To avoid accidental release of the locking pin 730 when the pusher arm 120 is reversed, in some embodiments, the first slider 740 drives the locking pin 730 to release the lock by a greater distance than the engagement groove 921 of the second slider 920 is disengaged from the engagement blocks 930, 940. In some embodiments, a first indication and a second indication may be further configured on the push frame 120 for the first operation member 710, and when the first operation member 710 moves to the first indication, the engagement slot 921 corresponding to the second slider 920 is disengaged from the first engagement block 930 or the second engagement block 940, at this time, the push frame 120 may be pushed to change direction, and the locking pin 730 still maintains the relative rotation between the locking auxiliary frame 140 and the connection frame 150. When the first operating member 710 is moved to the second direction, the locking pin 730 is driven to release the relative rotation between the lock aid frame 140 and the link frame 150 in response to the first slider 740, and the frame 100 can be retracted.

Referring to fig. 1 and 2, in some embodiments, each snap block 930, 940 may have a downwardly extending baffle 931, 941. Each of the hand levers may further be fixedly provided with a fastening member 980, the fastening member 980 being located below the corresponding second slider 920, and the fastening member 980 facing the engagement groove 921. When the push handle 120 is in the first position, each fastener 980 abuts against the first stop plate 931 of the first engagement block 930 on the corresponding auxiliary frame 140. When the push handle 120 is in the second position, each fastener 980 abuts against the second baffle 941 of the second engagement block 940 on the corresponding forefoot support bar. The arrangement of the baffles 931, 941 and the fastener 980 may limit the range of reverse rotation of the pusher arm 120.

Referring again to fig. 1 and 2, in some embodiments, the frame 100 further includes a drive assembly 600, and rotation of the push handle 120 drives the movable frame 220 along the seat tube 110 via the drive assembly 600. In some embodiments, referring to fig. 1, when the frame 100 is in the unfolded state, the movable frame 220 slides forward relative to the seat tube 110 when the handle frame 120 rotates about the pivot shaft 630 along the first direction S1 (S1 is illustrated as clockwise) to switch from the first position to the second position. Conversely, when the hand rest 120 rotates about the pivot shaft 630 along the second direction S2 (S2 is illustrated as a counterclockwise direction in the drawing) to switch from the second position to the first position, the movable frame 220 slides backward relative to the seat tube 110. Since the seat frame 230 is used to support the buttocks of the child, the back and forth movement of the movable frame 220 corresponds to the back and forth movement of the center of gravity of the child carrier according to the reversing of the push handle frame 120, so that the center of gravity of the child carrier is always close to the caretaker pushing the push handle frame 120, which helps the caretaker push the child carrier with a reduced effort.

Referring to fig. 2-4, an exemplary implementation of the drive assembly 600 is also shown in this example, although the implementation of the drive assembly 600 is not limited to the examples herein. The drive assembly 600 includes a linkage 640 and the aforementioned pivot shaft 630. The pivot shaft 630 rotates synchronously with the push handle frame 120, and the link mechanism 640 is connected between the pivot shaft 630 and the movable frame 220, for converting the rotation of the pivot shaft 630 into the movement of the movable frame 220 along the seat tube 110.

Fig. 3 and 4 also illustrate an exemplary embodiment of a linkage 640. Of course, in some alternative embodiments, the implementation of the linkage 640 is not limited to the examples herein. The link mechanism 640 includes, for example, a first drive lever 610 and a second drive lever 620. The first end of the first driving rod 610 is provided with a hole 601, and the first driving rod 610 is sleeved on the pivot shaft 630 through the hole 601 and rotates synchronously with the pivot shaft 630. The second end of the first driving rod 610 is connected to the first end of the second driving rod 620 through a pivot 660, the second end of the second driving rod 620 is provided with a hole 603, and the hole 603 is pivoted to the hole 302 (fig. 2) on the movable frame 220 through a second rotation axis N. When the hand pushing frame 120 rotates in a reversing manner, the hand pushing frame 120 drives the pivot shaft 630 to rotate synchronously, the pivot shaft 630 drives the first driving rod 610 to rotate synchronously, and the second driving rod 620 drives the movable frame 220 to move back and forth along the seat tube 110.

Fig. 3 and 4 also illustrate exemplary embodiments of the pivot shaft 630, although in some alternative embodiments, the embodiments of the pivot shaft 630 are not limited to those illustrated herein. The pivot shaft 630 includes, for example, a first shaft section 631, a second shaft section 632, and a third shaft section 633 connected in sequence. The first shaft section 631 is adapted to be received in the bore 1102 of the seat tube 110 to pivotally connect with the seat tube 110. The second shaft section 632 is larger in diameter than the first shaft section 631 and at least part of the length of the second shaft section 632 is provided with a tangential surface 6321. The hole 601 of the first link 610 has a tangential plane 6011, and the cooperation of the tangential plane 6321 and the tangential plane 6011 ensures the synchronous rotation of the first link 610 and the pivot shaft 630. At least part of the length of the third shaft section 633 is provided with a tangential surface 6331, and the hole 1201 of each pushing rod (the first pushing rod 122 and the second pushing rod 123) is provided with a tangential surface 1205 (see fig. 2), and the cooperation of the tangential surface 6331 and the tangential surface 1205 ensures the synchronous rotation of the pushing frame 120 and the pivot shaft 630. Of course, there are many ways to achieve the synchronous linkage of the pusher arm 120, the pivot shaft 630 and the first driving lever 610, and the method is not limited to the above-mentioned tangential engagement.

The portion of the pivot shaft 630 located between the tangential plane 6321 and the tangential plane 6331 is used to pivot with the hole 1401 of the auxiliary frame 140 and the hole 1502 of the connection frame 150. In some embodiments, the pivot 630 may include a shoulder 634, the shoulder 634 having a larger diameter and being located between the tangential surface 6321 and the tangential surface 6331. The shoulder 634 is, for example, fitted with a sleeve (not shown) through which the holes 1401 and 1502 can be pivotally connected to the pivot shaft 630. The link 150 is located, for example, between the auxiliary frame 140 and the push rod on the same side in the axial direction of the pivot shaft 630.

Referring to fig. 1-3, in some embodiments, the pivot shaft 630 has a central aperture 635, the central aperture 635 being configured for passage of a fastener 650. The fastener 650 may be, for example, a bolt or a rivet, and the fastener 650 may easily fix the shaped pivot shaft 630 with the respective parts fitted around the pivot shaft 630.

Referring again to fig. 1 and 2, an exemplary implementation of the back assembly 400 is also shown in this embodiment. Of course, in alternative embodiments, other implementations of the backrest assembly 400 are possible. In this embodiment, the back assembly 400 includes, for example, a back frame 410, a back tube 450, an adjustment mechanism 440, and an adjustment strap 430. The back frame 410 and the back tube 450 are pivoted to a first rotation shaft M, which is disposed on the movable frame 220, for example. The back frame 410 and the back tube 450 are rotatable about the first rotation axis M, respectively. An adjustment mechanism 440 and an adjustment strap 430 are coupled to the back frame 410.

The back frame 410 is, for example, U-shaped, and includes a first back lever 412 and a second back lever 413 on both left and right sides, and a back main body 411 connected to upper ends of the two back levers (the first back lever 412 and the second back lever 413). The two backrest bars are pivoted to the holes 301 of the movable frames 220 at the same side through the first pivot shafts M, respectively, so that the backrest frame 410 moves synchronously with the movable frames 220 while maintaining the front-rear relationship with the movable frames 220 when the frame 100 is in the unfolded state and the movable frames 220 move forward and backward with respect to the seat tube 110.

The backrest tube 450 is, for example, U-shaped, and two vertical tubes of the U-shaped structure are pivotally connected to the backrest frame 410 through a first pivot axis M, respectively. A seat cloth, not shown, wraps around the back frame 410 and the back tube 450, and the seat cloth located within the range defined by the back tube 450 forms a back rest that provides back support for the child. In some alternative embodiments, a rigid back plate (not shown) may be provided in the back. The adjustment straps 430 are connected to the respective backrest bars (the first backrest bar 412 and the second backrest bar 413), and are connected to an adjustment mechanism 440 located behind the backrest plate after bypassing the backrest pipe 450. The inclination angle of the backrest tube 450 and the backrest plate can be adjusted by increasing or decreasing the length of the adjustment strap 430 between the respective backrest bars and the adjustment mechanism 440. Embodiments of the adjustment mechanism 440 may be referred to in the related art and will not be described herein. Of course, in some alternative embodiments, the back assembly 400 may not be provided with the back tube 450, and the back plate may be connected to the back frame 410 only through the seat cloth, for example, and the inclination angle of the back plate may still be adjusted by the adjusting mechanism 440 and the adjusting strap 430.

In some embodiments, the child carrier may further include a connector (not shown) for defining a range of rotation of the back rest 410, avoiding over-rotation of the back rest 410 about the first axis of rotation M in the second direction S2 or in the first direction S1. In some embodiments, the connection member includes, for example, a flexible band connected between the rest bar (the first rest bar 132 or the second rest bar 133) and the back rest bar (the first back rest bar 412 or the second back rest bar 413) on the same side, and of course, the embodiment of the connection member is not limited thereto.

During the folding of the frame, the backrest frame 410 is easily moved toward the movable frame 220 by the pushing force. Referring to fig. 1, 2 and 5, the child carrier may further include a stopper 1600, an exemplary implementation of the stopper 1600 being also shown in this embodiment. Of course, in some alternative embodiments, the stopper 1600 may have other implementations. The stop block 1600 may be mounted to any suitable location on the frame 100 to limit rotation of the back frame 410 as desired.

In this embodiment, the stopper 1600 includes, for example, a stopper body 1610, where the stopper body 1610 has, for example, a mounting groove 1611, and the stopper 1600 is fixed to the rear end of the seat tube 110 through the mounting groove 1611. As can be seen in fig. 2 and 5, the seat tube 110 is a flat tube, the mounting groove 1611 is a flat groove correspondingly, and the stopper 1600 and the seat tube 110 sleeved together cannot rotate circumferentially. In addition, the limiting body 1610 of the limiting block 1600 may be provided with a hole 1612, the hole 1612 is used for the pivot shaft 630 to pass through, and the pivot shaft 630 is used for limiting the relative movement between the limiting block 1600 and the seat tube 110, so as to fix the limiting block 1600 on the seat tube 110. Of course, the structures of the stopper 1600 and the seat tube 110 are not limited to the examples in the present embodiment, and accordingly, the manner of restricting the circumferential rotation and the axial movement of the stopper 1600 and the seat tube 110 is not limited to the examples in the present embodiment. For example, in some alternative embodiments, the mounting slot 1611 of the stopper 1600 is coupled to the seat tube 110 by a tangential plane, and the aperture 1612 of the stopper 1600 may be coupled to the seat tube 110 by a pin parallel to the pivot 630.

Referring again to fig. 1, each of the backrest bars (first backrest bar 412 and second backrest bar 413) has a movable end 414, the movable end 414 being located, for example, at the bottom of the corresponding backrest bar and below the first rotation axis M. When the frame 100 is in the unfolded state and the push handle 120 is in the first backward inclined position, the movable end 414 is clamped between the limiting block 1600 and the movable frame 220, for example, so as to realize the positioning of the back rest 410. More specifically, the stopper 1600 may have a first end surface 1613, and the movable frame 220 may have a clamping portion 226, where the first end surface 1613 is opposite to the clamping portion 226 and adapted to clamp the movable end 414 from two sides, so as to achieve positioning of the back frame 410. First end surface 1613 and clamping portion 226 may have a surface shape that mates with movable end 414. In some embodiments, the movable end 414 extends obliquely at the bottom of the back bar, and the first end surface 1613 and the catch 226 extend obliquely accordingly. In some embodiments, when the frame 100 is in the unfolded state and the push handle 120 is in the second forward tilted position, the movable frame 220 is pushed to the front of the seat tube 110, and the movable end 414 is disengaged from the first end surface 1613 of the stopper 1600 while maintaining contact with the engagement portion 226 of the movable frame 220. At this time, the locking portion 226 of the movable frame 220 restricts the rotation of the back frame 410 in the second direction S2, while the back frame 410 is pulled by the above-described connector (not shown) which restricts the rotation of the back frame 410 in the first direction S1, whereby the back frame 410 is positioned under the cooperation of the locking portion 226 and the connector.

Fig. 6 shows a perspective view of the child carrier in one state between the unfolded state and the folded state, fig. 7 shows a cross-sectional view of the child carrier in another state between the unfolded state and the folded state, and fig. 8 shows a perspective view of the child carrier in the folded state. The folding process of the child carrier is described below with reference to fig. 1, 2, and 6 to 8.

Referring to fig. 1 and 2, when the child carrier needs to be folded, the pressing operation member 710 releases the lock between the auxiliary frame 140 and the connection frame 150, and then pushes the push handle 120 to rotate the auxiliary frame 140 about the pivot shaft 630 in the first direction S1, and the connection frame 150 rotates about the pivot shaft 94 in the second direction S2. The rotation of the connecting frame 150 drives the seat tube 110 to rotate around the pivot 91 in the second direction S2, and each grab bar rotates around the pivot 92 in the second direction S2, so as to urge the front foot supporting frame 160 and the rear foot supporting frame 170 to approach each other, and finally, the seat tube is folded into the folded state shown in fig. 8.

Referring to fig. 6 and 7, during the folding process of the child carrier, the movable frame 220 moves along the seat tube 110 along with the rotation of the hand pushing frame 120 in a direction away from the limiting block 1600, and the clamping portion 226 and the movable end 414 are separated from each other, so that a space is created for the rotation of the backrest frame 410. The push handle 120 rotates in the first direction S1 while pushing the back frame 410 to rotate about the first rotation axis M in the first direction S1, so that the back frame 410 approaches the movable frame 220.

When the vehicle frame 100 is switched from the unfolded state to the folded state, the backrest frame 410 is continuously pushed by the pushing frame 120, and uncontrolled shake is easily generated in the first direction S1, so that the backrest frame 410 cannot be folded together with the pushing frame 120 stably. Therefore, the stopper 1600 in the present embodiment is provided with the telescopic portion 1620, and when the frame 100 is switched from the unfolded state to the folded state, the telescopic portion 1620 is adapted to abut against the movable end 414 of the backrest rod on the same side, and applies a force rotating in the second direction S2 to the backrest frame 410, so as to counteract the thrust force exerted by the backrest frame 410 and rotating in the first direction S1, so that the backrest frame 410 can be stably folded together with the push handle frame 120, and the shaking phenomenon of the backrest frame 410 during the folding process of the frame 100 is alleviated.

Referring to fig. 5-7, in some embodiments, telescoping portion 1620 is disposed below first end face 1613. When the back rest 410 rotates in the first direction S1 about the first rotation axis M, the movable end 414 rotates on the telescopic path of the telescopic portion 1620, and the telescopic portion 1620 abuts against the movable end 414 to apply a force to the back rest 410. In some alternative embodiments, the telescoping path of telescoping portion 1620 may traverse at least a partial region of first end face 1613.

Fig. 5, 7 and 8 show an exemplary embodiment of the telescopic part 1620, and of course, the embodiment of the telescopic part 1620 is not limited to the example in this example. The telescoping portion 1620 may include a slider 1621 and a resilient return 1622. The slider 1621 is slidably engaged with the limiter body 1610 for abutting against the movable end 414. In some embodiments, the slider 1621 may be made of a strong and wear resistant material, for example. The resilient return 1622 is clamped between the limiter body 1610 and the slider 1621 to allow the slider 1621 to resiliently expand and contract when abutting the movable end 414. The resilient return 1622 may be, for example, a spring. In some alternative embodiments, the telescoping portion 1620 is, for example, of an elastically resilient structure or is made directly of an elastically deformable material, and the telescoping portion 1620 is mounted on the spacing body portion 1610 and is elastically deformable to apply a force to rotate the back frame 410 in the second direction S2 by abutting the movable end 414.

Referring to fig. 5, in some embodiments, the spacing body portion 1610 may be provided with a guide slot 1614, the guide slot 1614 having, for example, a slot 1615 facing the movable end 414 and a slot bottom opposite the slot 1615, which may be a closed structure. Telescoping portion 1620 may be mounted in guide slot 1614 through slot 1615 and may be elastically telescoping with respect to slot 1615. More specifically, the slider 1621 is slidably engaged with the guide slot 1614, the elastic restoring member 1622 is clamped between the bottom of the guide slot 1614 and the slider 1621, the slider 1621 is elastically retractable with respect to the slot 1614 by the elastic restoring member 1622, and the slider 1621 located outside the slot 1614 is adapted to abut against the movable end 414. Of course, in some alternative embodiments, the telescoping portion 1620 may be coupled to the spacing body portion 1610 by other suitable structures, i.e., the telescoping portion 1620 is not limited to being mounted to the spacing body portion 1610 by the guide slot 1614.

Referring to fig. 5, in some embodiments, a limiting mechanism 1630 may be further disposed between the slider 1621 and the body 1610, where the limiting mechanism 1630 is used to limit the sliding travel of the slider 1621, so as to prevent the telescopic portion 1620 from accidentally disengaging from the guide slot 1614. The limit mechanism 1630 may include, for example, a limit hole 1631 provided on a groove wall of the guide groove 1614 and a limit bump 1632 provided on the slider 1621. The limit bump 1632 is slidably engaged with the limit hole 1631. In some embodiments, the limit hole 1631 may be, for example, an elongated hole and the limit bump 1632 may be, for example, a pin mounted on the slider 1621. In some alternative embodiments, the location of the limit holes 1631 and limit bumps 1632 on the walls of the guide slots 1614 and the slider 1621 may be interchanged.

Referring to fig. 5, in some embodiments, the bottom of the slot 1615 of the guide slot 1614 has an extended support 1616 that protrudes outward. The elongated support 1616 provides additional support for the slider 1621 that expands and contracts relative to the slot 1614. In some embodiments, a limit protrusion 1617 may be disposed on an upper portion of the slot 1614, the limit protrusion 1617 being opposite the extension support 1616, the limit protrusion 1617 may limit the movable end 414 from over-pivoting about the first axis of rotation M in the first direction S1. In some embodiments, the limit projection 1617 may be disposed, for example, above the slot 1615 of the guide slot 1614, such as at the intersection of the end face 1618 and the first end face 1613 of the slot 1615.

Second aspect

In order to facilitate storage and transportation, most of the current commercial vehicles such as child strollers have a folding function, for example, the vehicle frame can be folded to couple the seat for folding. The angle adjustment of the backrest plate is generally carried out through the length adjustment of the binding belt by the backrest frame and the backrest plate on the seat of the trolley, but the backrest frame needs to be fixed, limited and folded, and the frame needs to be linked with the backrest frame on the seat to be synchronously folded and unfolded in the folding or unfolding process, so that the mechanism is complex in operation and inconvenient to use.

As shown in fig. 9, the second aspect of the present utility model provides a carrier, which may be a stroller, and the frame 100 of the stroller is simple in folding structure and convenient to use.

Specifically, as shown in fig. 9 and 10, the cart includes a frame 100, a seat assembly 200, a backrest assembly 400, a drive assembly 600, a fold-lock mechanism 700, and a link assembly 1500. The frame 100 is switchable between a stowed condition and a deployed condition. The seat assembly 200 is movably disposed on the frame 100. The connecting rod assembly 1500 is movably connected with the frame 100 and the seat assembly 200. The back assembly 400 is movably coupled to the seat assembly 200 by a linkage assembly 1500. When the vehicle frame 100 is switched from the unfolded state to the folded state, the backrest assembly 400 can be driven by the link assembly 1500 to fold in a direction approaching the seat assembly 200. The driving assembly 600 is disposed between the pusher arm 120 and the movable frame 220 (described in detail below) of the seat assembly 200, and the frame 100 is operable to drive the movable frame 220 along the seat tube 110 (described in detail below) of the frame 100 via the driving assembly 300.

Specifically, as shown in fig. 9 and 10, the frame 100 includes a seat tube 110, a push handle frame 120, an armrest frame 130, an auxiliary frame 140, a link frame 150, a front foot support 160, and a rear foot support 170. The armrest frame 130 includes an armrest body 131 and armrest bars 132, 133. The forefoot support frame 160 and the rearfoot support frame 170 are each generally H-shaped frame structures. The upper two ends of the front foot supporting frame 160 and the upper two ends of the rear foot supporting frame 170 are respectively pivoted with each other, and the lower two ends of the front foot supporting frame 160 and the lower two ends of the rear foot supporting frame 170 are separated from each other to form a stable triangular supporting structure. Both the lower two ends of the front foot support 160 and the lower two ends of the rear foot support are provided with two sets of wheel assemblies 181, 182. The armrest body 131 has a substantially U-shaped rod structure, and two ends thereof are respectively detachably or non-detachably connected to two pivot points of the front foot support 160 and the rear foot support 170. The two grab bars, a first grab bar 132 and a second grab bar 133, are provided substantially along the front-rear direction of the cart. The front ends of the two grab bars 132, 133 are pivotally connected to the pivot points of the front foot support 160 and the rear foot support 170. Two auxiliary frames 140 are correspondingly arranged, and the upper ends of the two auxiliary frames 140 are respectively pivoted with the rear ends of the two grab bars 132 and 133. The connecting frame 150 corresponds to two and is generally L-shaped frame structures. One end of the two connecting frames 150 is pivoted with the lower ends of the two auxiliary frames 140 respectively, and the other ends of the two connecting frames 150 are pivoted with the left and right sides of the rear foot supporting frame 170 respectively. Specifically, the push handle rack 120 includes a push handle body 121 having a generally U-shaped rack structure, and two push handle bars 122 and 123 connected to both ends of the push handle body 121. The ends of the two push rods 132, 133 are pivotally connected to the seat tube 110.

Specifically, as shown in fig. 9 and 10, the two seat pipes 110 are provided at both left and right sides of the cart, respectively, and the seat assembly 200 includes movable frames 220 slidably provided on the two seat pipes 110, respectively, and seat frames 230 fixed to the two movable frames 220. The structure of the seat tube 110 and the movable frame 220 on one side will be specifically described below by taking the following example:

as shown in fig. 11 to 13, the seat tube 110 extends along the front-rear direction of the cart, and the front and rear ends of the seat tube 110 are respectively pivoted to the front foot support 160 and the rear foot support 170. The movable frame 220 includes a sliding sleeve 221, a connection portion 222, a first mounting portion 223, and a second mounting portion 224.

The sliding sleeve 221 is sleeved outside the seat tube 110 and can move along the seat tube 110, and the connecting portion 222 is connected to the lower side of the sliding sleeve 221. The connection portion 222 is provided with a slot 2221, and a guide slot 2222 penetrating the slot 2221 is provided on one side slot wall or the opposite side slot walls of the slot 2221. The connection portion 222 is generally in an L-shaped frame structure, and includes a first connection section 2223 and a second connection section 2224 that are connected to each other. The first connection section 2223 extends in a direction parallel to the seat tube 110 and is connected to the sliding sleeve 221 on one side. One end of the second connection section 2224 is connected with one end of the first connection section 2223, and an extending direction of the second connection section 2224 crosses an extending direction of the first connection section 2223. The second connection section 2224 is disposed at an angle with the sliding sleeve 221, and a groove 225 (as shown in fig. 13) is formed between the second connection section 2224 and the sliding sleeve 221. The walls of the recess 225 form a snap-fit portion 226. The guide groove 2222 includes a first groove portion 2222a and a second groove portion 2222b that communicate with each other. The first groove portion 2222a extends along the moving direction of the movable frame 220, and the extending direction of the second groove portion 2222b intersects with the extending direction of the first groove portion 2222 a. The first end of the first groove portion 2222a away from the second groove portion 2222b is a first end 2222c, and the end of the second groove portion 2222b away from the first groove portion 2222a is a second end 2222d. In the present embodiment, the guide groove 2222 is disposed along the extending direction of the connecting portion 222, and in other embodiments, the connecting portion 222 may have other shapes, and the guide groove 2222 is not required to be disposed along the extending direction of the connecting portion 222. The first mounting portion 223 is connected to the inner side of the sliding sleeve 221, that is, the side of the sliding sleeve 221 opposite to the seat tube 110 on the other side, and one side of the seat frame 230 is mounted to the first mounting portion 223. The second mounting portion 224 is provided on the rear upper side of the sliding sleeve 221. In this embodiment, the movable frame 220 is an integrally formed structure.

Specifically, as shown in fig. 12 and 13, the driving assembly 600 includes a first driving lever 610 and a second driving lever 620 pivotally connected to each other. One end of the first driving rod 610, which is far from the second driving rod 620, is connected with the pushing frame 120, and one end of the second driving rod 620, which is far from the first driving rod 610, is connected with the movable frame 220. In this embodiment, an end of the second driving rod 620 away from the first driving rod 610 is connected to the second mounting portion 224 of the movable frame 220. In this way, the movable frame 220 can be driven to slide along the seat tube 110 by the rotation of the hand pushing frame 120 during the folding or unfolding process of the frame 100. In this embodiment, the driving assembly 600 further includes a pivot shaft 630, one end of the pivot shaft 630 is fixed to the end of the pushing rod 122, 123, and the other end of the pivot shaft 630 sequentially passes through the connecting frame 150, the auxiliary frame 140, and one end of the first driving rod 610 far from the second driving rod 620 to be pivoted to the rear end of the seat tube 110. Wherein, one end of the first driving rod 610 far from the second driving rod 620 is fixedly connected to the pivot shaft 630. Thus, when the hand pushing rods 122 and 123 rotate, the pivot shaft 630 drives the first driving rod 610 and the second driving rod 620 to pivot, so that the second driving rod 620 pushes the movable frame 220 to slide along the seat tube 110.

Further, as shown in fig. 12 and 13, the cart may further include a stow lock mechanism 700. The fold-locking mechanism 700 may specifically include a first operating member 710, a first traction member (not shown in the drawings), a locking pin 730, and a first slider 740. In the present embodiment, the first operating member 710 is provided with one and is operatively disposed at a substantially middle portion of the pushing body 121, which is not limited thereto. The first traction member, the locking pin 730 and the first slider 740 are respectively provided at two sides of the cart. The following will specifically describe the folding locking mechanism 700 on one side thereof as an example:

As shown in fig. 12 and 13, the first slider 740 is slidably disposed on the pushing rod 122, 123. One end of the first traction member is connected to the first operation member 710 and the other end is connected to the first slider 740. The first operating member 710 is operable to move the first slider 740 along the pushing bar 122, 123 upwards by the first traction member. The junction of the auxiliary frame 140 and the connection frame 150 forms a first locking groove 1503a. The auxiliary frame 140 is provided with a sliding groove 1403 on a side facing the pushing bars 122, 123, i.e., on an outer side of the auxiliary frame 140, and a locking pin 730 is slidably provided in the sliding groove 1403. When the cart is switched to the deployed state, the locking pin 730 is switchable between a deployed locking position and a deployed unlocking position. Specifically, when the cart is switched to the deployed state, the first locking groove 1503a is aligned with the sliding groove 1403 and the locking pin 730 can be inserted into the first locking groove 1503a (i.e., in the deployed locking position) to lock the frame 100 in the deployed state. The locking pin 730 can be disengaged from the first locking groove 1503a (i.e., in the deployed unlocked position) to unlock the frame 100 from the deployed state, and the frame 100 can be retracted. The locking pin 730 includes a locking portion 731 and a first pushing portion 732, which are connected to each other, wherein the locking portion 731 is slidably disposed in the sliding groove 1403 and can be inserted into the first locking groove 1503a, and one end of the first pushing portion 732 is fixed to the locking portion 731 and the other end protrudes toward the pushing rod 122, 123. The first slider 740 is provided with a second pushing portion 741 protruding toward the auxiliary frame 140. The second pushing portion 741 is abutted against the lower side of the first pushing portion 732. Thus, when the first operating member 710 is operated, the first operating member 710 may pull the first slider 740 to move upward by the first traction member, and the first slider 740 simultaneously drives the locking pin 730 to move upward to the unlocking position of the unfolded 97 by the abutment between the first abutment portion 732 and the second abutment portion 741, and the locking portion 731 of the locking pin 730 is disengaged from the first locking groove 1503a, thereby unlocking the vehicle frame 100 in the unfolded state.

As shown in fig. 13, 17a and 17b, a second locking groove 1503b may also be formed at the junction of the auxiliary frame 140 and the connection frame 150. When the cart is switched to the collapsed state, the locking pins 730 are switchable between a collapsed locking position and a collapsed unlocking position. Specifically, when the cart is switched to the collapsed state, the second locking groove 1503b is aligned with the sliding groove 1403 and the locking pin 730 can be inserted into the second locking groove 1503b (i.e., in the collapsed locking position) to lock the frame 100 in the collapsed state. The locking pin 730 can be disengaged from the second locking groove 1503b (i.e., in the collapsed unlocked position) to unlock the vehicle frame 100 from the collapsed state, and the vehicle frame 100 can be deployed. When the first operating member 710 is operated, the first operating member 710 may pull the first slider 740 by the first traction member to move upwards, and the first slider 740 simultaneously drives the locking pin 730 to move upwards to the retracted unlocking position by the abutment between the first abutment portion 732 and the second abutment portion 741, so that the locking portion 731 of the locking pin 730 is disengaged from the second locking groove 1503b, thereby unlocking the vehicle frame 100 in the retracted state.

First locking groove 1503a and second locking groove 1503b may be provided on opposite sides of pivot shaft 630 that pivots connecting frame 150 to auxiliary frame 140, first locking groove 1503a being aligned with sliding groove 1403 when frame 100 is in the deployed state. When the frame 100 is switched from the unfolded state to the folded state, the connecting frame 150 rotates relative to the auxiliary frame 140 about the pivot shaft 630, and when the frame 100 is switched to the folded state, the second locking groove 1503b is aligned with the sliding groove 1403.

Further, the cart may also include a reverse locking mechanism 900. The reversing locking mechanism 900 may specifically include a second operating member 910, a second traction member (not shown in the figures), and a second slider 920. As shown in fig. 10, the second operating member 910 has two and is operatively disposed inside the two push rods 122, 123, respectively. Referring to fig. 12 and 13, the second traction member and the second slider 920 are also respectively provided at both sides of the cart. The following will specifically describe the reversing lock mechanism 900 on one side thereof as an example:

As shown in fig. 12 and 13, the second slider 920 is slidably disposed on the pushing rod 122, 123, and the second slider 920 is located above the first slider 740, that is, the second slider 920 is located on a side of the first slider 740 near the pushing body 121. One end of the second traction member is connected to the second operation member 910, and the other end is connected to the second slider 920. The auxiliary frame 140 further has a first engaging block 930 at an upper end, and referring to fig. 9, a second engaging block 940 is disposed at an upper end of the front leg support 160, and an engaging groove 921 (fig. 10) capable of engaging with the first engaging block 930 or the second engaging block 940 is disposed on the second slider 920. Referring to fig. 10, as described above, when the second operation member 910 is operated, the second slider 920 can be driven by the second traction member to slide upwards along the pushing rods 122 and 123, and at this time, the engaging groove 921 of the second slider 920 can be disengaged from the first engaging block 930, and rotate about the pivot 630 until the engaging groove 921 of the second slider 920 is engaged with the second engaging block 940. The front and rear reversing of the cart can be realized, that is, before reversing, the front foot supporting frame 160 is positioned in front of the rear foot supporting frame 170, and after reversing, the front foot supporting frame 160 is positioned behind the rear foot supporting frame 170. It should be noted that the references herein to front and rear are with reference to the direction of travel of the cart. Specifically, the forward direction of the cart when the front foot support 160 is positioned in front of the rear foot support 170 may be referred to as a first forward direction F1 as shown in fig. 15, and the forward direction of the cart when the front foot support 160 is positioned behind the rear foot support 170 may be referred to as a second forward direction F2 as shown in fig. 16.

Specifically, as shown in fig. 13 and 14, the left and right sides of the cart are provided with link assemblies 1500. The specific structure of one of the link assemblies 1500 is described below:

The link assembly 1500 includes a first link 1510 and a second link 1520. The first link 1510 has a substantially elongated structure, and the first link 1510 has a first movable portion 1511 and a first pivoting portion 1512. In this embodiment, the first movable portion 1511 and the first pivoting portion 1512 are located at two ends of the first link 1510. The first movable portion 1511 is movably pivoted to the seat assembly 200, and the first pivot portion 1512 is pivoted to the frame 100. In this embodiment, the first movable portion 1511 is provided with a first movable protrusion 15111. One end of the first link 1510 having the first movable portion 1511 is inserted into the connection portion 222 through the notch 2221, and the first movable protrusion 15111 is inserted into the guide groove 2222 of the connection portion 222 and is slidable along the guide groove 2222, i.e., the first movable portion 1511 is slidable relative to the connection portion 222. In this way, the first link 1510 is movably sleeved in the notch 2221 and guided and positioned by the first movable protrusion 15111 and the guide groove 2222, so that the stability of the movement of the first link 1510 is increased. When the cart is in the deployed state, the first movable protrusion 15111 is located at the first end 2222c of the guide slot 2222. When the cart is in the collapsed state, the first movable protrusion 15111 is located at the second end 2222d of the guide slot 2222. The first pivoting portion 1512 is pivoted to the lower end of the auxiliary frame 140 through a pivot 97. In the present embodiment, the seat tube 110 is pivotally connected to the auxiliary frame 140 via the pivot shaft 630, and the pivot shaft 630 is located above the pivot shaft 97 at a lower end portion of the auxiliary frame 140 away from the pivot shaft 97. The first link 1510 further has a driving groove 1513, and the driving groove 1513 is located between the first movable portion 1511 and the first pivoting portion 1512 and extends along the length direction of the first link 1510.

Further, as shown in fig. 13 and 14, the second link 1520 includes a first rod portion 1521 and a second rod portion 1522 connected to each other, and the first rod portion 1521 and the second rod portion 1522 are at an angle and not perpendicular to each other, i.e., the second link 1520 has a substantially L-shaped structure. The end of the first rod portion 1521 away from the second rod portion 1522 is provided with a second movable portion 1523, and the second rod portion 1522 is provided with a second pivot portion 1524. The second movable portion 1523 is movably pivoted to the first link 1510, and the second pivot portion 1524 is pivotally connected to the backrest module 400. In this embodiment, the second movable portion 1523 is provided with a second movable protrusion 15231, and the second movable protrusion 15231 is inserted into the driving slot 1513 of the first link 1510 and is capable of sliding along the driving slot 1513. The connection between the first rod portion 1521 and the second rod portion 1522 is pivotally connected to the backrest tube 450 of the backrest assembly 400 by a first connecting shaft 95 (described in detail below). Further, when the cart is in the unfolded state, the second movable protrusion 15231 is in snap fit with the snap connection portion 226 on the movable frame 220, so that the cart can be better kept in the unfolded state. As shown in fig. 9, when the cart is in the retracted state, the second movable protrusion 15231 is disengaged from the engaging portion 226 of the movable frame 220. In other embodiments, the first rod 1521 or the second rod 1522 may be pivotally connected to the back tube 450 of the back assembly 400 by the first connecting shaft 95. The second pivot portion 1524 is pivotally connected to the first back frame 610 of the back assembly 400 via a second connecting shaft 96 (described in detail below).

Specifically, as shown in fig. 12 to 14, the backrest assembly 400 includes a first backrest frame 410, a second backrest frame 420, a backrest tube 450, a connection strap 430, and a strap adjuster 440.

As shown in fig. 12 to 14, the first back frame 410 includes two substantially elongated back bars 412, 413 located on the left and right sides of the cart. The lower ends of the two backrest bars 412, 413 are pivotally connected to the second pivotal portions 1524 of the two second links 1520 through the two second connecting shafts 96, respectively. The second back support 420 has a substantially U-shaped structure and includes a back transverse frame 421 and back vertical frames 422 respectively connected to two ends of the back transverse frame 421. The upper ends of the two backrest rods 412, 413 are respectively pivoted to two ends of the backrest transverse frame 421, and one ends of the two backrest vertical frames 422, which are far away from the backrest transverse frame 421, are respectively pivoted to the backrest tube 450. The back tube 450 is generally of a U-shaped rod configuration. As described above, the two ends of the back tube 450 are pivotally connected to the two second links 1520 through the first connecting shafts 95, respectively. Further, the back assembly 400 may also include two arcuate stop tabs 460. Each of the limiting tabs 460 is pivotally connected between one of the ends of the back tube 450 and one of the second links 1520. The provision of the limiting piece 460 between the back tube 450 and the second link 1520 is advantageous in reducing the shaking during the rotation of the back tube 450. The backrest pipe 450 may fix a backrest plate (not shown in the drawings), and the first backrest frame 410, the second backrest frame 420, and the backrest pipe 450 of the backrest assembly 400 may be covered with a covering such as a tarpaulin to form a space for an infant to lean or lie.

Further, as shown in fig. 12, one end of the connection strap 430 is connected to the second link 1520 of one side link assembly 1500, the other end of the connection strap 430 is connected to the second link 1520 of the other side link assembly 1500 by bypassing one side of the back tube 450 facing away from the seat assembly 200, and the strap adjuster 440 is provided to the connection strap 430 for adjusting the length of the connection strap 430. In this embodiment, as shown in fig. 14, two ends of the connecting strap 430 are respectively connected to the end portions of the second connecting rod 1520 on the same side, which are far away from the first connecting rod 1510, and the connection portion of the connecting strap 430 with the second connecting rod 1520 is located on one side of the second connecting shaft 96, which is far away from the first connecting rod 1510, that is, on the upper side of the second connecting shaft 96, that is, on the upper end of the second rod portion 1522.

Further, the length of the connecting strap 430 can be adjusted between the first length and the second length by the strap adjuster 440. The first length is the minimum length of the connecting band 430, and the second length is the maximum length of the connecting band 430. When the connecting strap 430 is a first length, as shown in fig. 14, the back tube 450 is at a first tilt angle relative to the seat assembly 200, the back tube 450 is in the same plane as the second back frame 420, and the stroller is in the seating mode. When the connecting strap 430 is a second length, as shown in fig. 15, the back tube 450 is at a second tilt angle relative to the seat assembly 200 and the stroller is in the recliner mode. At this time, as can be seen from the lateral cross section of the cart shown in fig. 15, the backrest pipe 450, the second backrest frame 420, the first backrest frame 410 and the second rod portion 1522 of the second link 1520 are connected end to form a substantially rectangular frame structure, so that the back and the head of the infant can lie in the space enclosed by the backrest pipe 450, the second backrest frame 420, the first backrest frame 410, the second rod portion 1522 of the second link 1520 and the tarpaulin. The second inclination angle is larger than the first inclination angle.

Fig. 16 shows a schematic diagram of the cart after the connecting band 430 is of the second length and the pusher arm 120 is reversed. Referring to fig. 15, when the pushing arm 120 is operated to rotate to switch the traveling direction of the cart from the first traveling direction to the second traveling direction, the pushing arms 122 and 123 will drive the first driving rod 610 and the second driving rod 620 to pivot through the pivot shaft 630, and push the movable frame 220 and the seat frame 230 to move along the seat tube 110 in the third direction D3 through the second driving rod 620, i.e. as seen in fig. 16, the movable frame 220 and the seat frame 230 are moved backward (along the direction D3), so that the center of gravity of the infant riding on the seat frame 230 is moved backward, thus saving more effort when the caregivers push the cart. Further, as shown in fig. 15 and 16, when the traveling direction of the cart is switched from the first traveling direction to the second traveling direction, the first link 1510 moves in the second traveling direction to a position where the first movable portion 1511 is located substantially at the communication position of the first groove portion 2222a and the second groove portion 2222b, and the first link 1510 protrudes from the connection portion 222 through the notch 2221.

Further, as shown in fig. 14 to 16, regardless of the length of the connecting strap 430 and regardless of whether the forward direction of the cart is the first forward direction or the second forward direction, the second movable protrusion 15231 can be engaged with the engaging end 226 of the movable frame 220 in a locking manner, so as to limit the second link 1520, thereby fixing the backrest tube 450 at a certain inclination angle.

The folding process of the right side of the cart will be specifically described below, and the folding process of the left side of the cart is substantially the same as the above:

When the cart needs to be retracted, as shown in fig. 9 and 10, the first operation member 710 on the pushing frame 120 may be operated, so that the first operation member 710 drives the first slider 740 to slide in a direction approaching the pushing body 121, that is, in the first direction D1, through the first traction member. Meanwhile, as shown in fig. 12 and 13, the first slider 740 pushes the first pushing portion 732 on the locking pin 730 by the second pushing portion 741, so that the locking pin 730 also slides along the first direction D1 to be separated from the first locking groove 1503a, the folding locking mechanism 700 releases the lock, the pushing hand rack 120 is pushed down, and the pushing hand rack 120 and the auxiliary rack 140 can be rotated to be folded in a direction approaching to the seat tube 110, i.e., the second direction D2 in fig. 12. The movable frame 220 is also driven to slide toward the front end of the seat tube 110 by the linkage action of the first driving rod 610 and the second driving rod 620 during the rotation and folding process of the auxiliary frame 140, i.e. slide along the third direction D3 in fig. 12. Meanwhile, as shown in fig. 12 and 14, the movable frame 220 sliding along the third direction D3 will also drive the first movable protrusion 15111 to slide along the first groove portion 2222a by the cooperation of the guide groove 2222 and the first movable protrusion 15111, that is, the first link 1510 slides in the opposite direction of the third direction D3. Meanwhile, due to the sliding of the movable frame 220, the second movable protrusion 15231 of the second link 1520 is disengaged from the engagement end 226 (see fig. 13) of the movable frame 220. When the push handle 120 is further pushed down, the push handle 120 and the auxiliary frame 140 further pivot, thereby driving the pivot shaft 97 to move downward and further pulling the first movable protrusion 15111 of the first link 1510 to slide to the second groove portion 2222b. As shown in fig. 17, in the process of sliding the first movable protrusion 15111 to the second end 2222D of the guide groove 2222, the angle between the first link 1510 and the push rod 122, 123 becomes gradually smaller, that is, corresponds to the first link 1510 rotating clockwise with respect to the pivot shaft 97, that is, pivoting in the fourth direction D4 in fig. 17. Meanwhile, when the first link 1510 slides, the second link 1520 is also rotated about the first connection shaft 95 in a counterclockwise direction, i.e., pivoted in the fifth direction D5 in fig. 14 or 17, by the engagement of the driving groove 1513 and the second movable protrusion 15231 (see fig. 5). The second link 1520 also drives the first backrest frame 410 and the backrest pipe 450 pivoted thereto to pivot and fold together with the entire backrest assembly 400 in a direction approaching the seat assembly 200 during rotation, thereby completing the overall folding of the cart. Fig. 17a and 17b show the cart in a collapsed state, in which the movable frame 220 is slid to a position close to the front end of the seat tube 110, the first movable protrusion 15111 is moved to the second end 2222d, and the second movable protrusion 15231 is located approximately in the middle of the driving slot 1513, and the backrest assembly 400, the seat assembly 200, and the frame 100 are relatively folded, so that the occupied space is small, and the cart is convenient to store and carry. at this time, the sliding groove 1403 and the second locking groove 1503b are aligned, the first operating member 710 may be released, so that the first slider 740 moves in the opposite direction to the first direction D1 under the action of the slider resetting member (not shown in the drawings) until the locking pin 730 is inserted into the second locking groove 1503b, and the cart is locked in the retracted state.

In contrast to the folding process, when the folding cart needs to be unfolded, as shown in fig. 17a and 17b, the first operation member 710 may be operated, so that the first operation member 710 drives the first slider 740 to slide in a direction approaching the pusher body 121, that is, in the first direction D1, through the first traction member. Meanwhile, the first slider 740 pushes the first pushing portion 732 on the locking pin 730 through the second pushing portion 741, so that the locking pin 730 also slides along the first direction D1 until it is separated from the second locking groove 1503b, and the folding locking mechanism 700 releases the lock, and releases the lock of the cart in the folded state. At this time, the pushing handle 120 can be lifted to drive the pivot 97 to move upwards. The pivot shaft 97 then drives the first link 1510 to rotate counterclockwise relative to the pivot shaft 97, and pivots along the fifth direction D5 in fig. 17a, such that the first movable protrusion 15111 also slides along the guide slot 2222 from the second end 2222D to the first end 2222c, and at the same time, the first link 1510 drives the second link 1520 to rotate clockwise about the first link shaft 95, i.e., in the fourth direction D4, through the cooperation of the driving slot 1513 and the second movable protrusion 15231 (see fig. 14). The rotation of the second link 1520 also causes the first back frame 410 and the back tube 450 pivotally coupled thereto to pivot apart along with the entire back assembly 400 in a direction away from the seat assembly 200, as shown in fig. 14. At this point, the slide 1403 and the first locking groove 1503a are aligned and the first operating member 710 can be released such that the first slider 740 is moved in the opposite direction to the first direction D1 by the slider reset member (not shown) until the locking pin 730 is reinserted into the first locking groove 1503a and the stroller is locked in the deployed state.

The cart provided by the second aspect of the utility model has at least the following technical effects:

In the cart, the link assembly 1500 is movably connected with the frame 100 and the seat assembly 200, and the backrest assembly 400 is movably connected with the seat assembly 200 through the link assembly 1500, when the frame 100 is switched from the unfolded state to the folded state, the frame 100 can drive the backrest assembly 400 to fold towards the direction close to the seat assembly 200 through the link assembly 1500, and the whole folding structure is simple and convenient to use.

Third aspect of the invention

Referring to fig. 18-23, and in particular fig. 18, 19, 25 and 26, a third aspect of the present utility model provides a vehicle, which may be a child vehicle such as a child stroller, comprising a frame 100, a seat assembly 200, a backrest assembly 400 and a linkage 500. The frame 100 comprises two side frames 101 and 102 arranged opposite each other and a push handle 120. The seat assembly 200 is mounted between the two side frames 101 and 102 and is configured to be movable in a fore-aft direction P, Q of the frame 100 relative to the side frames 101, 102 between a first position and a second position. The backrest assembly 400 is mounted to the seat assembly 200 and is configured to be angularly adjustable relative to the seat assembly 200. The push handle bracket 120 is pivotally connected to the side frames 101, 102 and is configured to drive the seat assembly 200 to move relative to the side frames 101, 102 in the fore-aft direction P, Q of the frame 100 when pivoted relative to the side frames 101, 102. The linkage 500 is disposed on one side of the seat assembly 200 and is connected to the back assembly 400. The linkage 500 is configured such that the range of angular adjustment of the backrest assembly 400 relative to the seat assembly 200 is the same when the seat assembly 200 is in the first and second positions.

It should be understood that the same range of angular adjustment of the backrest assembly 400 relative to the seat assembly 200 as described herein means that the angle of the backrest assembly 400 relative to the seat assembly 200 remains substantially the same or unchanged over a range as the seat assembly 200 moves from the first position to the second position or vice versa without adjusting the angle of the backrest assembly 400 relative to the seat assembly 200 by the angular adjustment mechanism.

The frame 100 may include two seat tubes 110 disposed on the two lateral frames 101, 102. The seat assembly 200 may be disposed on the seat tube 110. In some embodiments, the side frame 101 includes a first front foot support bar 161 and a first rear foot support bar 171. The first forefoot support bar 161 and the first rearfoot support bar 171 are connected to each other and form a generally triangular structure with the ground. In some embodiments, the lateral frame 101 further includes a first grab bar 132 coupled to the first front foot support bar 161 and/or the first rear foot support bar 171, the first grab bar 132 being disposed generally parallel to the ground or slightly inclined relative to the ground. In some embodiments, the side frame 101 further includes an auxiliary frame 140, the auxiliary frame 140 being pivotally connected to the first grab bar 132 and the seat assembly 200, respectively. In other embodiments, the auxiliary frame 140 may also be connected to the first rear foot support bar 171 and form a substantially triangular structure with the first grab bar 131 and the first rear foot support bar 171. The side frame 102 may have a laterally symmetrical arrangement with the side frame 101, for example, including a second front foot support bar 162, a second rear foot support bar 172, a second grab bar 133, and another auxiliary frame 140, which are laterally symmetrically arranged with the first front foot support bar 161, the first rear foot support bar 171, the first grab bar 132, and the auxiliary frame 140, respectively.

The seat assembly 200 may be movably (e.g., slidably) disposed on the seat tube 110 in the fore-aft direction P, Q of the frame 100. In some embodiments, the seat assembly 200 includes a movable frame 220 and a seat frame 230 disposed on the movable frame 220, the movable frame 220 being movably (e.g., slidably) disposed on the seat tube 110 in the fore-aft direction P, Q of the frame 100. In some embodiments, the movable frame 220 includes a sliding sleeve 221 (best seen in fig. 21 and 22), and the sliding sleeve 221 is slidably received over the seat tube 110 in the front-to-rear direction of the vehicle frame 100. It will be appreciated that the movable frame 220 may be provided on the seat tube 110 movably in the front-rear direction of the vehicle frame 100 in other manners, such as by providing a slide groove.

The backrest assembly 400 may include a backrest tube 450 for supporting a backrest plate (not shown). The backrest assembly 400 may be mounted to the seat assembly 200 by a backrest tube 450. In some embodiments, the bottom of the back tube 450 is pivotally connected to the movable frame 220 such that the bottom of the back tube 450 slides with the movable frame 220 relative to the seat tube 110. Referring to fig. 20 and 25, in some embodiments, the backrest assembly 400 includes an adjustment strap 430 (the straps in other figures have been omitted for clarity, e.g., the straps are not shown in fig. 18 and 19, but the stroller of fig. 18 and 19 may be configured similar to that of fig. 25), with both ends of the adjustment strap 430 being connected to the two side frames 101, 102, respectively, and with the upper middle portion of the backrest tube 450 supported on the adjustment strap 430.

The push handle 120 is pivotable relative to the side frames 101, 102 to switch the stroller 10 between a first use condition (e.g., forward use condition, see fig. 18) and a second use condition (e.g., reverse use condition, see fig. 19). The pusher arm 120 may be disposed outside of the side frames 101, 102 and pivotally connected to the side frames 101, 102. In some embodiments, the push handle 120 is pivotally connected to the auxiliary frame 140 of the side frames 101, 102. In some embodiments, the pusher arm 120 is pivotally coupled to the side frames 101, 102 (e.g., the auxiliary frame 140) via a pivot shaft 630 (see fig. 21). The pivot shaft 630 may be disposed through the side frames 101, 102 (e.g., the auxiliary frame 140). In other embodiments, the first usage state may be a reverse usage state, and the second usage state may be a forward usage state, which is not limited thereto.

As shown in fig. 20, the push handle 120 may be coupled to the seat assembly 200 by a drive assembly 600, such as to the movable frame 220 of the seat assembly 200. The drive assembly 600 may be configured to translate the pivoting of the push handle 120 relative to the side frames 101, 102 into movement of the seat assembly 200 in the fore-aft direction of the frame 100, e.g., to translate the pivoting of the push handle 120 relative to the side frames 101, 102 into movement (e.g., sliding) of the swing frame 220 relative to the seat tube 110 in the fore-aft direction of the frame 100.

In some embodiments, the drive assembly 600 is disposed inboard of the side frames 101, 102. In some embodiments, referring to fig. 20 and 21, the push handle 120 is coupled to the drive assembly 600 via pins 630 that extend through the side frames 101, 102. In some embodiments, the drive assembly 600 is a linkage mechanism.

In some embodiments, as shown in fig. 20-24, the drive assembly 600 includes a first drive rod 610 and a second drive rod 620 disposed on a side of the mobile frame 220 remote from the side frames 101, 102. The first end of the first driving lever 610 is connected to the push frame 120 through a pin 630, and in particular, one end of the pivot shaft 630 is fixedly connected to the push frame 120, and the other end of the pivot shaft 630 is fixedly connected to the first end of the first driving lever 610 through the side frame 101 or 102 (e.g., through the auxiliary frame 140) and the seat tube 110. For example, square holes may be provided on the first ends of the push frame 120 and the first driving lever 610, and both ends of the pivot shaft 630 may have a square structure and may be caught in the square holes, thereby achieving the fixed connection of the pivot shaft 630 with the first ends of the push frame 120 and the first driving lever 610, but the present utility model is not limited thereto, e.g., the pivot shaft 630 may be connected with the push frame 120 and the first driving lever 610, etc. according to the connection manner described with reference to fig. 3 and 4 of the first aspect of the present utility model. The second end of the first driving rod 610 is pivotally connected to the first end of the second driving rod 620. For example, another pivot shaft (not shown) may pass through the second end of the first driving lever 610 and the first end of the second driving lever 620 and be fixed to the movable frame 220 such that the second end of the first driving lever is pivoted with the first end of the second link driving lever and is pivotable with respect to the movable frame 220. Further, the other pivot shaft may also pass through the backrest pipe 450 to pivot the backrest pipe 450 to the movable frame 220, and the backrest pipe 450 may move synchronously with the movable frame 220 when the movable frame 220 moves along the front-rear direction P, Q of the vehicle frame 100. The second end of the second drive rod 620 is coupled to the seat assembly 200, such as to the mobile frame 220. When the push handle 120 pivots relative to the lateral frames 101, 102, the push handle 120 can rotate the first driving rod 610 via the pivot shaft 630, and can drive the seat assembly 200 to move (e.g., slide) along the front-rear direction of the frame 100 via the second driving rod 620, such as the movable frame 220 to move (e.g., slide) along the front-rear direction of the frame 100 relative to the seat tube 110. It is to be understood that the above description is only an example of the drive assembly 600, and that other configurations of the drive assembly 600 are possible, such as the first and second drive rods 610, 620 may be disposed between the side frames 101, 102 and the seat tube 110, such as the number of drive rods may vary, and such as other drive mechanisms other than linkage mechanisms may be employed.

Referring to fig. 18 and 19, in the stroller provided by the present utility model, when the user rotates the push handle 120, the push handle 120 drives the movable frame 220 to move relative to the seat tube 110 along the front-back direction of the frame 100 through the driving assembly 600, and at this time, the bottom of the backrest 450 moves synchronously with the movable frame 220, so that the angle of the backrest 450 relative to the seat assembly 200 is changed.

A third aspect of the present utility model provides a linkage 500, the linkage 500 may be configured such that when the push frame 120 is pivoted relative to the lateral frames 101, 102, the backrest assembly 400 moves relative to the lateral frames 101, 102 in a fore-aft direction of the frame 100 without changing its angle relative to the seat assembly 200. Specifically, the linkage 500 may be connected to the push handle 120 or the seat assembly 200 on the one hand, and the adjustment strap 430 of the backrest assembly 400 on the other hand, so that when the push handle 120 pivots relative to the lateral frames 101, 102, the adjustment strap 430 moves the middle-upper portion of the backrest tube 450 synchronously with the bottom portion of the backrest tube 450, that is, the backrest tube 450 and the movable frame 220 synchronously move in the front-rear direction of the frame without pivoting relative to the movable frame 220. It should be understood that the upper middle portion of the back tube 450 is referred to herein with respect to the bottom of the back tube 450 as a location at a distance from the bottom of the back tube 450, and that the back assembly 400 is commonly supported by the bottom of the back tube 450 being pivotally connected to the movable frame 220 and the middle portion of the back tube 450 being engaged with the adjustment strap 430.

The link mechanism 500 of the present utility model will be described in detail with reference to the first, second and third embodiments.

Referring to fig. 18 to 24, in the first embodiment, the linkage mechanism 500 is connected to the seat assembly 200 (e.g., the movable frame 220) and the end of the adjustment strap 430, respectively, and is configured to drive the end of the adjustment strap 430 to move synchronously with the seat assembly 200 when the seat assembly 200 moves in the front-rear direction of the vehicle frame 100, since the upper middle portion of the back tube 450 is supported on the adjustment strap 430, both the upper middle portion and the bottom portion of the back tube 450 move synchronously with the seat assembly 200 without changing the angle between the back tube 450 and the seat assembly 200.

Referring to fig. 20-24, the linkage 500 may include a linkage rod 510. The first end of the linkage rod 510 is connected to the seat assembly 200, such as to the mobile frame 220. The second end of the linkage rod 510 is movably mounted to the side frames 101, 102 in a fore-aft direction relative to the frame 100 and is fixedly connected to the ends of the adjustment strap 430 such that when the seat assembly 200 is moved in the fore-aft direction of the frame 100 relative to the side frames 101, 102, the first end of the linkage rod 510 moves the second end of the linkage rod 510 and thus the ends of the adjustment strap 430 in the fore-aft direction P, Q, thereby moving the upper middle portion of the back tube 450 in the fore-aft direction P, Q. In this way, as the seat assembly 200 moves relative to the side frames 101, 102 in the fore-aft direction of the frame 100, the middle upper portion of the back tube 450 and the bottom portion of the back tube 450 can move in unison so as not to pivot relative to the seat assembly 200 but to change its angle relative to the seat assembly 200.

Referring to fig. 21, a linkage rod 510 is disposed between the side frames 101, 102 and the seat assembly 200, such as between the side frames 101, 102 and the mobile frame 220. Specifically, the side frames 101, 102 are provided with a first chute 1303 extending in the front-rear direction P, Q of the frame, and the second end of the link lever 510 is slidably mounted to the first chute 1303. Further, a first chute 1303 is provided on the grab bars 132, 133. In some embodiments, the length of the first runner 1303 is the same as the distance the seat assembly 200 moves when moving from its first position to its second position. It is understood that the length of the first runner 1303 may be different from the distance the seat assembly 200 moves from its first position to its second position, e.g., the length of the first runner 1303 is greater than that distance.

As shown in fig. 21 to 24, the first end of the link lever 510 is connected to the movable frame 220, and in particular, one side of the first end of the link lever 520 facing the movable frame 220 is provided with a first protrusion 512, the movable frame 220 is provided with a groove or through hole 214 (see fig. 22 and 24) for receiving the first protrusion 512, and the first protrusion 512 is engaged with the groove or through hole 214 to connect the link lever 510 with the movable frame 220. In some embodiments, the movable frame 220 is provided with a through hole 214 for receiving the first protruding portion 512, and a second protruding portion 212 (see fig. 24) extends from the through hole 214 in a direction away from the linkage rod 510, where the first protruding portion 512 is penetrated in the second protruding portion 212. In some embodiments, referring to fig. 23 and 24, a side of the movable frame 220 facing the link lever 510 may be provided with a recess 213, and a first end of the link lever 510 may be received in the recess 213 corresponding to the position of the groove or through hole 214, and the recess 213 may restrict the first end of the link lever 510 from rotating counterclockwise with respect to the movable frame 220. In some embodiments, the linkage mechanism 500 further includes an elastic member 520 (e.g., a torsion spring), one end of the elastic member 520 is looped around the second protrusion 212, and the other end of the elastic member 520 is hooked on a side of the linkage rod 510 away from the movable frame 220, so that the first end of the linkage rod 510 can be restricted from rotating clockwise relative to the movable frame 220. Specifically, when the handle 120 is pivoted from the first use state (see fig. 18) to the second use state (see fig. 19), the recess 213 may restrict the counterclockwise rotation of the first end of the link lever 510, thereby driving the second end of the link lever 510 to slide in the first direction P together with the first end (see fig. 24), and when the handle 120 is pivoted from the second use state (see fig. 19) to the first use state (see fig. 18), the elastic member 520 may restrict the clockwise rotation of the first end of the link lever 510, thereby driving the second end of the link lever 510 to slide in the second direction Q together with the first end (see fig. 24).

The movable frame 220 may include a sliding sleeve 221 and a mounting portion 224. The sliding sleeve 221 is sleeved outside the seat tube 110 and can move along the seat tube 110. The mounting portion 224 is provided on the upper side of the sliding sleeve 221. Grooves or through holes 214, recesses 213, and second protrusions 212 may all be provided on the mounting portion 224.

In the first embodiment provided by the present utility model, when the user rotates the push handle 120 to switch between the first usage state (see fig. 18) and the second usage state (see fig. 19), the push handle 120 drives the movable frame 220 of the seat assembly 200 to move (e.g., slide) on the seat tube 110 along the front-rear direction of the frame 100 via the transmission mechanism 600, the bottom of the backrest tube 450 of the backrest assembly 400 moves along with the movable frame 220 along the front-rear direction of the frame 100, and at the same time the movable frame 220 drives the linkage rod 510 as a whole (i.e., the first end and the second end) to move along the front-rear direction of the frame 100, thereby driving the end of the adjusting strap 430 and thus the middle-upper portion of the backrest tube 450 to also move along with the seat assembly 200 along with the front-rear direction of the frame 100. As such, both the upper middle portion of the back tube 450 and the bottom portion of the back tube 450 move synchronously with the seat assembly 200 so as not to change the angle of the back assembly 400 relative to the seat assembly 200.

Referring to fig. 25-32, in a second embodiment, a linkage 500 is connected to the ends of the push-handle bracket 120 and the adjustment strap 430, respectively, and is configured to move the ends of the adjustment strap 430 in synchronization with the seat assembly 200 as the push-handle bracket 120 pivots relative to the frame 100.

Specifically, referring to fig. 27 and 28, the linkage 500 includes a transmission assembly 530 and a slider 540. The slider 540 is slidably disposed on the side frames 101, 102 in the front-to-rear direction P, Q of the frame 100 and is connected to the end of the adjustment strap 430. The transmission assembly 530 is coupled to a pivot shaft 630 and a slider 540, respectively, that extend through the side frames 101, 102 (e.g., the auxiliary frame 140). The transmission assembly 530 is configured to translate the pivoting of the push handle 120 relative to the side frames 101, 102 (i.e., the rotation of the pivot shaft 630) into sliding movement of the slider 540 in the fore-aft direction of the frame 100 to move the ends of the adjustment strap 430 and thus the middle-upper portion of the back tube 450 in synchronization with the bottom of the back tube 450.

In particular, the transmission assembly 530 may include a linkage gear 531, one or more driven gears 532, and an output gear 533. The linkage gear 531 may be coupled to the pivot shaft 630 through the traction member 550 and the driving wheel 560. Specifically, the driving wheel 560 is fixedly connected to the pivot shaft 630 and can rotate with the pivot shaft 630, for example, the driving wheel 560 may be sleeved on the pivot shaft 630. Referring to fig. 28, the traction member 550 is connected to the driving wheel 560 and the linkage gear 531, respectively, and the driving wheel 560 can rotate by driving the linkage gear 531 through the traction member 550 when rotating. For example, the traction member 550 may be a cable, one end of which is fixed at a first position of the linkage gear 531, and the other end of which extends to the driving wheel 560 and passes around the driving wheel 560 to be extended back to the linkage gear 531 and is fixed at a second position opposite to the first position, and a portion of the cable wound around the driving wheel 560 is also fixed to a certain position (e.g., a position R shown in fig. 28) of the driving wheel 560, and when the driving wheel 560 rotates, lengths of the cable portions on both sides of the driving wheel 560 and the linkage gear 531 are changed, so that the linkage gear 531 also rotates. The linkage gear 531 is meshed with one or more driven gears 532, the one or more driven gears 532 are further meshed with an output gear 533, and the output gear 533 is further meshed with the slider 540, so that rotation of the linkage gear 533 can drive the slider 540 to move in the front-rear direction of the frame 100. The slider 540 may be provided with teeth 541 (see fig. 29) so as to be meshed with the output gear 533. Since the rotation angle of the pivot shaft 630 is small, by providing one or more driven gears 532 and making teeth of the driven gears 532 smaller than those of the link gears 531, the rotation of the link gears 531 at a small angle can be amplified to the rotation of the output gears 533 at a large angle so that the slider 540 can move a large distance. It should be understood that the above detailed description is merely exemplary, and those skilled in the art may make several adjustments, variations and improvements thereto, for example, the driving wheel 560 may be omitted, the traction member 550 may be connected to the pivot shaft 630 and the linkage gear 531, respectively, and the pivot shaft 630 may rotate by the traction member 550 to rotate the linkage gear 531. For example, one or more of the driven gears 532 or the output gears 533 may be omitted, and the linkage gears 531 may be directly engaged with the slider 540, where appropriate. For another example, the number of driven gears 532 may be adjusted according to the actual situation.

In some embodiments, the linkage 500 is disposed inside the side frames 101, 102 such that the linkage 500 is not visible to the user's eyes. In some embodiments, the side frames 101, 102 have one or more cavities therein, and the transmission assembly 530, the slider 540, the traction member 550, and the drive wheel 560 are disposed within the one or more cavities of the side frames 101, 102.

In some embodiments, the drive assembly 530 (including the linkage gear 531, one or more driven gears 532, and an output gear 533) and the slider 540 are each disposed in a cavity within the grab bars 132, 133. The driving wheel 560 is disposed in the cavity of the auxiliary frame 140 and is connected to the link gear 531 through the traction member 550.

As shown in fig. 30 to 32, the slider 540 may include a sliding portion 543 and a connection portion 542, and the teeth 541 may be disposed on the connection portion 542. The connection portion 542 is for meshing with the output gear 533. When the link gear 531 rotates, the connection portion 542 and thus the sliding portion 543 can be driven to slide in the front-rear direction of the frame 100 by the driven gear 532 and the output gear 533.

As shown in fig. 29-32, the stroller further includes a mount 1700 disposed in a cavity within the grab bars 132, 133. The mounting base 1700 includes a housing 1710, and a baffle 1711 is disposed on an inner wall of the housing 1710, and the baffle 1711 divides the housing 1710 into a first accommodating space 1701 and a second accommodating space 1702. The sliding portion 543 of the slider 540 may be disposed in the first accommodating space 1701 and slidably disposed on the shutter 1711. Referring to fig. 30, both sides of the shutter 1711 may be provided with a first stopper 1712 and a second stopper 1713 for restricting a sliding limit position of the sliding portion 543. The distance between the first and second stopper portions 1712, 1713 in the front-rear direction of the frame 100 may be the same as the distance the seat assembly 200 moves in the front-rear direction of the frame 100 between its first and second positions. The linkage gear 531, the one or more driven gears 532, and the output gear 533 may be disposed in the second accommodating space 1702, at least one of which is engaged with the connection portion 542 of the slider 540. The inner wall of the shutter 1711 may be provided with one or more protrusions (as shown in fig. 31) for mounting the link gear 531, the one or more driven gears 532, and the output gear 533 in the second accommodation space 1702.

As shown in fig. 30 to 32, the mount 1700 may further include a cover 1720, and the cover 1720 may be mounted to the housing 1710 and define a second accommodating space 1702 together with the housing 1710. The linkage gear 531, the one or more driven gears 532, and the output gear 533 may be disposed between the cover 1720 and the case 1710. One end of the connection portion 542 of the slider 540 is provided with teeth 541, and may span the upper end of the cover 1720 and extend outside the cover 1720. The outer side of the cover 1720 may be provided with an opening 1722 (see fig. 31), and the link gear 531, the one or more driven gears 532, or the output gear 533 may be engaged with the connection portion 542 of the slider 540 through the opening 1722.

Specifically, as shown in fig. 31, the outer side of the cover 1720 may be provided with a step 1721, and one end of the connection portion 542 of the slider 540 may be provided with teeth 541 and may extend to the step 1721. The step 1721 may be provided with an opening, and teeth of the link gear 531, one or more driven gears 532, or the output gear 533 may protrude through the opening 1722 to be engaged with the teeth 541 of the slider 540.

In some embodiments, referring to fig. 25, the lateral frames 101, 102 (e.g., the grab bars 132, 133) are provided with a second runner 1304 extending along the front-to-rear direction P, Q of the frame 100, and the end of the adjustment strap 430 can be fixedly connected to a slider 540 disposed in the cavity of the lateral frames 101, 102 through the second runner 1304, and the end of the adjustment strap 430 can slide in the second runner 1304. When the sliding member 540 slides along the front-rear direction of the frame 100, the end of the adjusting strap 430 is driven to move along the front-rear direction of the frame 100 in the second sliding slot 1304. The length of the second runner 1304 in the fore-aft direction of the frame 100 may be the same as the distance the seat assembly 200 moves in the fore-aft direction of the frame 100 between its first and second positions. It will be appreciated that in other embodiments, the length of the second runner 1304 in the fore-aft direction of the frame 100 may also be different from the distance the seat assembly 200 moves in the fore-aft direction of the frame 100 between its first and second positions, without being limited thereto.

In some embodiments, referring to fig. 31, a recess or through hole 544 may be provided on the slider 540 to connect with an end of the adjustment strap 430.

In the second embodiment of the present utility model, when the user rotates the push handle 120 to switch between the first usage state and the second usage state, the pivot shaft 630 rotates with the push handle 120, so as to drive the driving wheel 560 to rotate. Rotation of the drive wheel 560 rotates the linkage gear 531 via the traction member 550, thereby driving the slider 540 to slide via the one or more driven gears 532 and the output gear 533, and thus driving the end of the adjustment strap 430 to move in the front-rear direction of the vehicle frame 100, and causing the upper portion of the back tube 450 to move synchronously with the bottom portion of the back tube 450 to prevent angular variation between the back assembly 400 and the seat assembly 200.

Referring to fig. 33 and 34, in the third embodiment, the linkage 500 is different from the first and second embodiments in that it includes a guide 580 and a connection 590. The guide 580 is attached to the frame 100, e.g., to the cross frames 101, 102, e.g., to the grab bars 132, 133 of the cross frames 101, 102. The end of the adjustment strap 430 passes through the guide 580 and is connected to the connector 590. The link 590 is in turn coupled to the seat assembly 200 and is movable with the seat assembly 200 in the fore-aft direction P, Q of the frame 100, thereby moving the back tube 450 synchronously with the seat assembly 200 by adjusting the strap 430.

The guide 580 may function to support the end of the adjustment strap 430 so that the back tube 450 may be supported on the middle portion of the adjustment strap 430. As the seat assembly 200 moves in the fore-aft direction P, Q of the frame 100, the end of the adjustment strap 430 is moved by the connection 590, causing a change in the length of the portion of the adjustment strap 430 between the guide 580 and the back tube 450, which in turn causes movement of the upper middle portion of the back tube 450 in the fore-aft direction P, Q of the frame 100. Specifically, as the seat assembly 200 moves forward in the P direction, the length of the portion of the adjustment strap 430 between the guide 580 and the back tube 450 is shortened, thereby moving the upper middle portion of the back tube 450 forward. As the seat assembly 200 moves rearward in the Q direction, the length of the portion of the adjustment strap 430 between the guide 580 and the back tube 450 becomes longer, thereby moving the middle-upper portion of the back tube 450 rearward.

The guide 580 is positioned such that the middle upper portion of the back tube 450 may be supported on the adjustment strap 430 after the end of the adjustment strap 430 passes therethrough. For example, the guide 580 is typically located above the bottom of the backrest tube 450, such as attached to the cross frames 101, 102, such as to the grab bars 132, 133 of the cross frames 101, 102. The guide 580 may be, for example, a smooth cylindrical rod such that the portion of the adjustment strap 430 that passes over the guide 580 may slide over the guide 580. The guide 580 is in turn, for example, a roller, to facilitate sliding of the adjustment strap 430 over the portion of the guide 580. It is to be appreciated that the guide 580 is not so limited and other configurations may be employed so long as it supports the portion of the adjustment strap 430 passing therethrough and allows the portion of the adjustment strap 430 passing therethrough to slide thereon. The number of the guide members 580 may be one or more, and may be specifically set according to actual needs. In some embodiments, the connector 590 may be a separate connector, such as a cable, that connects with the ends of the seat assembly 200 (e.g., the swing frame 220 or the seat) and the adjustment strap 430, respectively. In some embodiments, the connector 590 is part of the adjustment strap 430, or the connector 590 may be integrally formed with the adjustment strap 430, in other words, the end of the adjustment strap 430 may be directly connected to the seat assembly 200 after passing through the guide 580. It is to be understood that the connection 590 is not limited thereto and other configurations may be employed as long as the above-described functions can be achieved.

In the third embodiment of the present utility model, when the seat assembly 200 moves in the front-rear direction of the frame 100, the seat assembly 200 moves the end of the adjustment strap 430 through the connection 590, thereby causing a change in the length of the portion of the adjustment strap 430 between the guide 580 and the back tube 450, thereby causing a movement of the upper middle portion of the back tube 450 in the front-rear direction of the frame 100. Since the upper middle portion of the back tube 450 can move in synchronization with the bottom of the back tube 450, the angle between the back assembly 400 and the seat assembly 200 is prevented from being changed.

Fourth aspect of

Fig. 35 and 36 show perspective views of a carrier 1000 according to a fourth aspect of the present utility model, the carrier 1000 having a handrail mounting unit 300, and the handrail mounting unit 300 will be described together with the description of the carrier 1000.

In the embodiment shown in fig. 35, a carrier 1000 is illustratively illustrated as a child carrier such as a child stroller. It is to be appreciated that in some alternative embodiments, the type of carrier 1000 is not limited to a child stroller, which may be, for example, a child dining chair, a child highchair, a child tricycle, and the like.

Referring to fig. 35, the child carrier 1000 includes a frame 100 and a seat assembly 200. The frame 100 may include a push handle frame 120, an armrest frame 130, a front foot support 160, a rear foot support 170, and the like. The frame 100 is generally of a side-to-side symmetrical configuration. The frame 100 also includes two seat tubes 110 for mounting the seat assembly 200 in a side-to-side symmetrical arrangement. The seat assembly 200 includes a seat frame 230 mounted between two seat tubes 110. In some embodiments, the seat frame 230 may be soft-encased to provide a comfortable seat for the child. The armrest frame 130 includes two armrest bars 132, 133 disposed laterally symmetrically and above the seat assembly 200, thereby defining a lateral range of motion for the child. The armrest frame 130 further includes an armrest body 131, the armrest body 131 being disposed above the seat assembly 200 and being disposed laterally, both left and right ends of the armrest body 131 being detachably connected to the corresponding armrest bars 132, 133, respectively, through the armrest mounting unit 300 provided in the fourth aspect of the present utility model. Referring to fig. 35, when the armrest body 131 is connected between the two armrest bars 132, 133, the armrest body 131 may define a range of forward movement of the child. Referring to fig. 36, when the armrest body 131 is separated from the armrest bars 132, 133, the armrest body 131 no longer restricts forward movement of the child, which facilitates seating of the child on the seat assembly 200 from outside the child carrier or removal from the seat assembly 200.

In some alternative embodiments, the armrest body 131 may be detachably connected to the corresponding armrest rod 132, 133 by the armrest mounting unit 300 provided in the fourth aspect of the present utility model at only one end, and the other end of the armrest body 131 may be detachably connected to the corresponding armrest rod 132, 133 by other suitable structures or may be non-detachably connected (e.g., pivotally connected). For example, in some alternative embodiments, the other end of the armrest body 131 is pivotally connected to the corresponding armrest rod 132, 133 by a pivot that is, for example, perpendicular to the horizontal plane or inclined relative to the horizontal plane. When one end of the armrest body 131 is separated from the corresponding armrest rod 132, 133, the other end of the armrest body 131 may swing in the left-right direction about the pivot, thereby releasing the restraint of the child seated on the seat assembly 200, and the child may be easily separated from the seat assembly 200.

Referring to fig. 35 to 38, the armrest mounting unit 300 provided in the fourth aspect of the present utility model includes a first coupling seat 310, a first magnetic attraction member 330, a second coupling seat 320, and a second magnetic attraction member 348. The first connecting base 310 is connected to the handrail 132, 133, and the second connecting base 320 is connected to the handrail body 131. Of course, in some alternative embodiments, the first connection mount 310 may be connected to the armrest body 131, while the second connection mount 320 is connected to the armrest bars 132, 133. The first connecting base 310 is provided with a card matching portion 327. The first magnetic attraction piece 330 is disposed on the first connection seat 310. The second connecting seat 320 is provided with a clamping piece 341. The second magnetic attraction member 348 is disposed on the second connection seat 320.

When the armrest body 131 is required to be mounted to the armrest bars 132, 133, the first and second connection seats 310, 320 are detachably connected by the detachable engagement of the engagement member 341 and the engagement portion 327 and the magnetic attraction of the first and second magnetic attraction members 330, 348. When the armrest body 131 is to be removed from the armrest bars 132 and 133, the first connection base 310 and the second connection base 320 may be separated after the engagement between the engagement piece 341 and the engagement portion 327 is released. The handrail installation unit 300 provided by the embodiment of the utility model has a simpler structure, and the clamping of the clamping piece 341 and the clamping part 327 and the magnetic attraction of the first magnetic attraction piece 330 and the second magnetic attraction piece 348 provide double insurance for the connection of the first connection seat 310 and the second connection seat 320.

In some embodiments, the first and second magnetic attraction pieces 330 and 348 may each employ a permanent magnet, or one of the first and second magnetic attraction pieces 330 and 348 may employ a permanent magnet, and the other may be made of a magnetic material capable of being attracted by the permanent magnet.

Fig. 39 and 40 show exploded views of an exemplary embodiment of the first connection mount 310. In some embodiments, the first connection mount 310 includes a connection body 3101 and a mounting mount 370. The connection body 3101 is connected to the grab bars 132, 133. More specifically, the connection body 3101 may be mounted on the grab bars 132, 133 or integrally formed with the grab bars 132, 133, for example. The mounting seat 370 is mounted on the connecting body 3101 by a fastening mechanism 376, and the engaging portion 327 is disposed on the mounting seat 370 and includes at least one engaging groove 312, where the engaging groove 312 is configured to detachably engage with the engaging member 341. The engaging member 341 has, for example, at least one engaging portion 34111 (described in detail below with reference to fig. 41 and 42) protruding toward the engaging groove 312, and the engaging portion 34111 is configured to detachably engage with the engaging groove 312. Through setting up the block groove 312 in the mount pad 370, the mount pad 370 is installed on the connection body 3101 with the help of fastening mechanism 376, and the connection body 3101 of like structure can be connected with different second connecting seat 320 through the different mount pads 370 of assembly like this, and then with the handrail body 131 assorted of different models, has effectively improved the commonality of first connecting seat 310 like this. In some embodiments, the mount 370 may be removably mounted to the outer surface of the connection body 3101 by a fastening mechanism 376 such that the mount 370 may be conveniently mounted to the connection body 3101. In some embodiments, the mount 370 and the connection body 3101 may be, for example, an integrally formed piece.

An exemplary embodiment of a fastening mechanism 376 is shown in fig. 39 and 40. The outer surface 3102 of the connection body 3101 is provided with a locking hole 3106 and a mounting hole 3107, and opposite ends of the mounting seat 370 are respectively provided with an elastic arm 3761 and a connection hole 377, the elastic arm 3761 is used for being engaged with the locking hole 3106, and a fastener (for example, a screw) 3762 passes through the connection hole 377 and is connected with the mounting hole 3107. The fastening mechanism 376 includes a resilient arm 3761 and a fastener 3762. Of course, the implementation of the fastening mechanism 376 is not limited to the above examples, for example, in some alternative embodiments, the fastening mechanism 376 may include at least two fasteners (e.g., screws) by which the mount 370 is non-rotatably mounted to the connector body 3101.

Referring to fig. 39, in some embodiments, an outer surface 3102 of the connection body 3101 has a positioning groove 3103, and the mounting seat 370 is non-rotatably mounted in the positioning groove 3103. The positioning groove 3103 is, for example, a non-circular groove, and a portion of the mounting seat 370 located in the positioning groove 3103 matches, for example, a shape of the positioning groove 3103. In some embodiments, the positioning groove 3103 is, for example, a U-shaped groove, the positioning groove 3103 having a spacing base 3104 and a mouth 3109 opposite the spacing base 3104. The clip hole 3106 is near the stopper bottom 3104, and the mounting hole 3107 is near the mouth portion 3109. The first end of the mounting seat 370 abuts against the limiting bottom 3104, and the elastic arm 3761 protrudes outwards from the first end of the mounting seat 370 to be engaged with the engaging hole 3106. The second end of the mounting seat 370 is adjacent to the mouth 3109 and has a connection hole 377, and the engagement slot 312 is located in the middle of the mounting seat 370. In some embodiments, not shown, the mount 370 may be mounted on the connection body 3101, for example, by a pivot, not shown, formed, for example, by a bolt, and may act as a fastening mechanism to mount the mount 370 to the body 3101 such that the mount 370 may rotate relative to the body 3101. It will be appreciated that the pivot should be arranged so as not to affect the engagement of the engagement groove 312 with the engagement member 341 and not to affect the arrangement of the first magnetic member 330 and its magnetic attraction with the second magnetic member 348.

Referring to fig. 39 and 40, in some embodiments, a counter table 3108 may be provided at a position of the connection body 3101 corresponding to the mounting hole 3107, and a boss 378 may be provided at a position of the mounting seat 370 corresponding to the connection hole 377. While the boss 378 and counter 3108 are mated to one another, the attachment hole 377 and mounting hole 3107 are centered with respect to one another, which facilitates mounting of the fastener 3762. Of course, in some alternative embodiments, the positions of the counter 3108 and the boss 378 on the connection body 3101 and the mount 370 may be interchanged.

Referring to fig. 39, in some embodiments, the mating portion 327 includes a protrusion 371, and the engaging groove 312 is disposed on the protrusion 371. Referring to fig. 37, the engaging member 341 includes at least one elastic arm 3411 located in the second connecting seat 320, and each elastic arm 3411 may have the engaging portion 34111. The protrusion 371 of the engaging portion 327 is adapted to extend into the second connecting seat 320, and the engaging groove 312 enters the second connecting seat 320 along with the protrusion 371 to engage with the engaging portion 34111 of the elastic arm 3411, so that the second connecting seat 320 is connected with the first connecting seat 310. At this time, the first magnetic attraction member 330 and the second magnetic attraction member 348 approach each other to reach a desired magnetic attraction position.

Referring to fig. 38-40, an exemplary mounting of the first magnetic attraction member 330 is also shown in this embodiment. Specifically, the mount 370 has a receiving chamber 3710, an opening of the receiving chamber 3710 faces the connection body 3101 and can be covered by the connection body 3101, and a bottom of the receiving chamber 3710 extends into the projection 371. The first magnetic member 330 is mounted at the bottom of the receiving chamber 3710 through an opening of the receiving chamber 3710 to allow the first magnetic member 330 to approach the second magnetic member 348 of the second coupling seat 320 as much as possible. The first magnetic attraction member 330 located in the housing chamber 3710 is not separated from the housing chamber 3710 by the blocking of the connection body 3101.

Referring to fig. 38-40, in some embodiments, the outer surface 3102 of the connection body 3101 may also be provided with a positioning post 3105, e.g., the positioning post 3105 is provided to a slot wall of the positioning slot 3103, which positioning post 3105 protrudes into the receiving cavity 3710 through an opening of the receiving cavity 3710. The positioning post 3105, in cooperation with the receiving cavity 3710, may improve the mechanical properties of the mounting block 370. In some embodiments, the positioning post 3105 may abut the first magnetic 330 to avoid the first magnetic 330 from rocking in the receiving cavity 3710.

Of course, the embodiment of the first magnetic attraction 330 is not limited to the above example. For example, in some alternative embodiments, the first magnetic attraction 330 is integral with the mount 370 by over-molding. In still other alternative embodiments, at least a portion of the area of the mount 370 (e.g., the projection 371) may be made of a magnetic material and act as the first magnetic attraction 330.

Fig. 41 and 42 show exploded views of an exemplary embodiment of the second connection socket 320. In some embodiments, the second connection socket 320 has a receiving space 323 and an insertion hole 3222 communicating with the receiving space 323. The second magnetic member 348 and the engaging member 341 are mounted in the accommodation space 323, for example. The insertion hole 3222 is used for inserting the card matching portion 327 into the accommodation space 323 or withdrawing from the accommodation space 323. As described above, the engaging member 341 includes, for example, at least one elastic arm 3411 located in the accommodating space 323, and the engaging member 341 is detachably engaged with the engaging groove 312 of the engaging portion 327 entering the accommodating space 323 by the engaging portion 34111 of the elastic arm 3411, so as to detachably connect the first connecting socket 310 and the second connecting socket 320, and to bring the first magnetic attraction member 330 and the second magnetic attraction member 348 into a desired magnetic attraction position. Referring to fig. 41, the card matching portion 327 moves in the insertion and extraction direction T with respect to the insertion hole 3222, so that the card matching portion 327 enters the accommodation space 323 or leaves the accommodation space 323 through the insertion hole 3222.

Fig. 41 and 42 illustrate an exemplary embodiment of the installation of the second magnetic attraction member 348 and the engagement member 341 into the accommodation space 323. The second coupling socket 320 is provided with a mounting hole 3231, and the mounting hole 3231 communicates with the receiving space 323. The mounting hole 3231 and the insertion hole 3222 are located on different surfaces of the second connection mount 320, e.g., the mounting hole 3231 and the insertion hole 3222 are located on two generally perpendicular or intersecting surfaces of the second connection mount 320. The second magnetic attraction member 348 and the engagement member 341 are mounted on the support 349, and the support 349 is inserted into the accommodation space 323 through the mounting hole 3231 and fixed to the second connection seat 320 by the fastener 3492. The fastener 3492 is, for example, a screw that passes through the aperture 3229 of the second coupling seat 320 and is coupled to the aperture 3498 of the support 349. Of course, in other embodiments, the second magnetic member 348 and the engaging member 341 may be mounted to the second connecting seat 320 by other suitable structures.

Fig. 41 and 42 illustrate an exemplary embodiment of a second magnetic attraction 348. Specifically, the mount 349 is provided with a boss 3495, and the boss 3495 protrudes toward the insertion hole 3222. The boss 3495 is formed with a receiving cavity 34950. Referring to fig. 38, the receiving cavity 34950 has a bottom portion 34951 and an opening 34952, with the bottom portion 34951 being closer to the insertion hole 3222 than the opening 34952. The second magnetic element 348 is received in the bottom 34951 of the receiving cavity 34950 to allow the second magnetic element 348 to be as close as possible to the first magnetic element 330. The opening 34952 of the accommodating cavity 34950 may be limited by the second connecting seat 320, so as to prevent the second magnetic attraction member 348 from being accidentally separated from the accommodating cavity 34950. Of course, the implementation of the second magnetic element 348 is not limited to the above examples, and in some alternative embodiments, the second magnetic element 348 may be integral with the support 349 by over-molding, or at least a portion of the area of the support 349 (e.g., the boss 3495) may be made of a magnetic material and act as the second magnetic element 348.

Fig. 41 and 42 illustrate an exemplary embodiment of the engagement member 341. The engaging member 341 may include two elastic arms 3411, where first ends of the two elastic arms 3411 are connected to each other, for example, by a fixing portion 3412, and the fixing portion 3412 is fixed on the support 349. In some alternative embodiments, the first ends of the two spring arms 3411 are spaced apart from each other and secured to the support 349, respectively. The second ends of the two elastic arms 3411 are opposite to each other, and the two elastic arms 3411 are used for holding the engaging groove 312.

It will be appreciated that, during the process of the card matching portion 327 entering the accommodating space 323 through the insertion hole 3222, when the card matching portion 327 abuts against the two elastic arms 3411, the two elastic arms 3411 may be elastically deformed to open so as to allow the card matching portion 327 to move further into the accommodating space 323. When the engaging portions 34111 of the two elastic arms 3411 face the engaging groove 312, the two elastic arms 3411 automatically return to the original position and are engaged with the engaging groove 312 by the engaging portion 34111. When the engagement between the engaging member 341 and the engaging portion 327 needs to be released, the two elastic arms 3411 are forced to open the two elastic arms 3411, so that the engaging portion 34111 is away from the engaging groove 312, and then the engaging portion 327 can be removed from the insertion hole 3222.

Referring to fig. 41 and 42, the fixed portion 3412 is connected to the support 349, for example, by a mounting post 3497. In some embodiments, the securing portion 3412 has, for example, an aperture 34120, and a mounting post 3497 is provided on the support 349, the mounting post 3497 being for threading into the aperture 34120. The support 349 may also be provided with a spacer 3491, the spacer 3491 being adjacent to the first ends of the two spring arms 3411 and spaced from the mounting post 3497. When the engaging portion 327 does not enter the accommodating space 323, the two elastic arms 3411 can abut against the spacer 3491 therebetween, so that the position of the engaging member 341 can be positioned, and the engaging member 341 is prevented from rotating around the mounting column 3497 and cannot be engaged with the engaging groove 312.

Referring again to fig. 39, in some embodiments, the snap groove 312 may include an annular groove disposed on the outer peripheral wall of the projection 371. Referring to fig. 42, the engagement member 341 includes two substantially arc-shaped elastic arms 3411, and the two elastic arms 3411 are disposed opposite to each other and form a space 340 for receiving the projection 371. When the engaging member 341 engages with the engaging groove 312, the two elastic arms 3411 hold the engaging groove 312. Referring to fig. 41 and 42, each elastic arm 3411 has an engaging portion 34111 protruding toward the space 340, and each engaging portion 34111 is, for example, an arc-shaped tab. The engaging portion 34111 is adapted to be inserted into the engaging groove 312 and engaged with the engaging groove 312, thereby restricting the removal of the card matching portion 327 from the insertion hole 3222.

Of course, the embodiment of the engagement piece 341 and the engagement groove 312 is not limited to the above example. For example, in some alternative embodiments, the snap groove 312 may include at least one groove formed on the outer peripheral wall of the projection 371. The engaging member 341 may include at least one elastic arm 3411, and the engaging portion 34111 on each elastic arm 3411 is, for example, an engaging hook, and each engaging hook is adapted to be inserted into a corresponding groove. The number and configuration of the elastic arms 3411 and the engagement grooves 312 can be set as desired.

Referring again to fig. 36, the first connection mount 310 has a first abutment surface 38, the first abutment surface 38 being disposed on at least one of the body 3101 and the mounting base 370. The second connection base 320 has a second docking surface 3220. When the first connecting seat 310 and the second connecting seat 320 are connected, the first abutting surface 38 and the second abutting surface 3220 abut against each other. The projection 371 projects with respect to the first abutment surface 38, and the insertion hole 3222 is located inside the area defined by the second abutment surface 3220.

In the embodiment shown in fig. 36, the first docking surface 38 and the second docking surface 3220 are vertical surfaces (e.g., perpendicular to a horizontal plane), and the insertion direction T of the mating portion 327 is parallel to the horizontal plane, for example. The second connection seats 320 at both ends of the armrest body 131 are located between the first connection seats 310 of the armrest bars 132, 133 at the left and right sides. To facilitate the engagement of the first connector 310 and the second connector 320, the second connector 320 is pivotally connected to the armrest body 200 through a pivot 325, and the axial direction of the pivot 325 is perpendicular to the insertion/extraction direction T.

The following describes the assembly and disassembly of the first connector 310 and the second connector 320 with reference to fig. 36.

When the armrest body 131 is required to be mounted to the armrest bars 132 and 133, the second connection seats 320 at both ends of the armrest body 131 are rotated in a direction approaching each other, and then both ends of the armrest body 131 are moved between the armrest bars 132 and 133 at both left and right sides. When the insertion hole 3222 is aligned with the protrusion 371, the second connection seats 320 at the two ends of the armrest body 200 are rotated in a direction away from each other, the protrusion 371 and the engagement groove 312 are inserted into the insertion hole 3222, and the elastic arm 3411 of the engagement member 341 is engaged with the engagement groove 312 on the protrusion 371.

When the armrest body 131 needs to be separated from the respective armrest bars 132 and 133, the engaging relation between the engaging groove 312 and the elastic arm 3411 is released, and the respective second connecting seats 320 are rotated about the pivot 325, so that the protrusions 371 are withdrawn from the insertion holes 3222, and the armrest body 131 can be removed.

To prevent the armrest body 131 from rotating up and down relative to the respective armrest bars 132, 133, referring to fig. 38, 39, and 41, in some embodiments, the mount 370 has a stop collar 372, the stop collar 372 protruding relative to the first interface surface 38, and the stop collar 372 and the insertion aperture 3222 may be nested together in any non-circular shape such that the stop collar 372 is non-rotatably nested within the insertion aperture 3222 to non-rotatably engage the second connection mount 320. For example, in some embodiments, the insertion aperture 3222 is a U-shaped aperture and the stop plate 372 has a corresponding U-shaped outer profile. In some alternative embodiments, the insertion hole 3222 may be a flat hole or a polygonal hole, and the shape of the stopper 372 may be adapted to the shape of the insertion hole 3222. Referring to fig. 39, in some embodiments, the projection 371 protrudes from the end surface of the stopper turntable 372 and is located inside the region defined by the end surface of the stopper turntable 372, and the projection 371 protrudes into the accommodation space 323 in a small structure, which facilitates miniaturization of the structure of the engagement piece 341.

In some embodiments, to facilitate releasing the engagement between the engaging member 341 and the engaging groove 312, the second connecting seat 320 may further be provided with a releasing member 342 and an elastic restoring member 345. More specifically, the release member 342 is operatively connected to the engagement member 341 for pushing the elastic arm 3411 to release the engagement with the engagement groove 312. The elastic reset element 345 is used for driving the release element 342 to reset.

Referring to fig. 41 and 42, an exemplary embodiment of a release member 342 is shown. In some embodiments, the second connection socket 320 is provided with a mounting hole 3232, the mounting hole 3232 being opposite to the mounting hole 3231. The releasing member 341 has an operating portion 3423, a shoulder portion 3429 and at least one pushing portion 3421, and after the releasing member 341 enters the accommodating space 323 through the mounting hole 3231, the operating portion 3423 protrudes from the mounting hole 3232 and slidably engages with the mounting hole 3232. The shoulder 3429 abuts against the inner wall of the second connecting seat 320 to prevent the release member 341 from falling from the mounting hole 3232. The number of pushing portions 3421 is equal to the number of elastic arms 3411, each elastic arm 3411 is provided with an abutment portion 3413, and each pushing portion 3421 abuts against the corresponding abutment portion 3413. In some embodiments, the pushing portion 3421 may be provided with a pushing inclined surface 3421a, and the abutment portion 3413 may be a cylinder extending from the elastic arm 3411. The pushing portion 3421 abuts against the abutment portion 3413 via the pushing inclined surface 3421 a. When the release member 342 is moved by the release force, the pushing inclined surface 3421a pushes the elastic arm 3411 to move away from the engaging groove 312, so that the engaging portion 34111 is disengaged from the engaging groove 312. Of course, in other embodiments, other implementations of the pushing portion 3421 and the abutment portion 3413 are possible and are not limited to the above examples. For example, in some alternative embodiments, a ramp may be provided on the abutment 3413, with the pushing portion 3412 being, for example, a bump that abuts the ramp of the abutment 3413.

Referring to fig. 43, in some embodiments, at least one guide surface 3496 may also be disposed within the receiving space 323, the at least one guide surface 3496 corresponding to the at least one abutment 3413. The guide surface 3496 may be formed on a side wall of the boss 3495. Each pushing portion 3421 is sandwiched between the guide surface 3496 and the abutment portion 3413 corresponding to each other, and each pushing portion 3421 has a sliding surface 3421c slidably engaged with the corresponding guide surface 3496. The guide surface 3496 and the slide surface 3421c are, for example, parallel to the moving direction of the release member 342. When the pushing portion 3421 pushes the abutting portion 3413, the guiding surface 3496 supports the pushing portion 3421, so that the pushing portion 3421 is prevented from elastically deforming when abutting against the abutting portion 3413, and the abutting portion 3413 cannot be pushed normally, so that the engaging portion 34111 cannot be smoothly disengaged from the engaging groove 312.

Fig. 41 and 42 illustrate an exemplary embodiment of the elastic restoring member 345. In some embodiments, the resilient return 345 is, for example, a spring, and the resilient return 345 is mounted between the release member 342 and the support 349. Referring to fig. 41, in some embodiments, a stopper 3493 may be provided on the support 349, a positioning post 3494 is provided on the stopper 3493, and one end of the elastic reset element 345 abuts against the stopper 3493 and is sleeved on the positioning post 3494. The other end of the resilient return member 345 extends into the inner cavity wall of the release member 342. When the pressing force applied to the release member 342 is removed, the elastic reset member 345 can drive the release member 342 to reset, and the engaging member 341 correspondingly resets. In some embodiments, a stopper 3493 may be provided between the second ends of the two elastic arms 3411, making full use of the space between the second ends of the two elastic arms 3411, which contributes to the compactness of the support 349.

Fifth aspect of

As shown in fig. 44 and 45, the fifth aspect of the present utility model provides a carrier, which may be a stroller, a wheelchair, a child dining chair, a highchair, etc. In this embodiment, the carrier is a child carrier, such as a stroller. The vehicle includes a frame 100, a seat assembly 200, and a height adjustment mechanism 800. The height adjusting mechanism 800 is simple in structure and convenient to operate.

Specifically, as shown in fig. 44 and 45, the frame 100 includes at least a push handle 120, a front foot support 160, a rear foot support 170, a front wheel assembly 181, and a rear wheel assembly 182. The forefoot support frame 160 includes first and second forefoot support bars 161 and 162 on the left and right sides. A foot pedal 190 (also referred to as a foot rest) is connected between the first forefoot support bar 161 and the second forefoot support bar 162. The rear foot support 170 includes first and second rear foot support bars 171 and 172 on the left and right sides. The front wheel assemblies 181 are respectively connected to the bottom ends of the first and second front foot support bars 161 and 162. Rear wheel assemblies 182 are respectively connected to the bottom ends of the first rear foot support bar 171 and the second rear foot support bar 172.

Specifically, as shown in fig. 44 and 45, the front leg support bars 161, 162 have a long bar-like structure, the tips of the front leg support bars 161, 162 are pivotally connected to the rear leg support bars 171, 172 on the corresponding sides, and the lower ends of the front leg support bars 161, 162 are connected to the front wheel assembly 181. The foot board 200 is provided between the two forefoot support bars 161 and 162.

The height adjustment mechanism 800 includes a forefoot support assembly 810 and a locking assembly 830. The foot pedal 190 is disposed between two forefoot support assemblies 810 and is height adjustable relative to the forefoot support assemblies 810. A locking assembly 830 is disposed between the forefoot support assembly 810 and the foot pedal 190 for locking or unlocking the adjustment of the height of the foot pedal 190 relative to the forefoot support assembly 810.

As shown in fig. 44 and 45, each forefoot support assembly 810 includes a forefoot support bar 161, 162 and a guide 811. A locking assembly 830 is provided between the two forefoot support bars 161 and 162 and the corresponding sides of the foot board 190 for unidirectional locking or bidirectional locking of the foot board 190 in the height direction. In the illustrated embodiment, the guide 811 has a long strip-like structure having a length smaller than that of the forefoot support bars 161, 162, the guide 811 is fixed to the opposite inner sides of the forefoot support bars 161, 162, that is, to the opposite sides of the forefoot support bars 161, 162 from the other forefoot support bars 161, 162, and the extending direction of the guide 811 is substantially the same as the extending direction of the forefoot support bars 161, 162. At least one of the opposite front sides and the opposite rear sides of the guide 811 is provided with a guide groove 8111 provided along the extending direction of the guide 811. In this embodiment, guide slots 8111 are provided on both the opposite front and rear sides of guide 811.

In this embodiment, as shown in fig. 45 to 46, the pedal plate 190 is an integrally formed structure, and includes a pedal body 191 and a clamping member 192. The pedal body 191 is substantially in a strip plate structure, and two clamping members 192 are respectively connected to two ends of the pedal body 191 and respectively form an included angle with the pedal body 191. In this embodiment, the included angles between the two clamping members 192 and the pedal body 191 are all 90 degrees. Each of the clamping members 192 includes a connecting portion 1921 and a mating portion 1922 (fig. 47), the mating portion 1922 having two sides and being connected to two sides of the connecting portion 1921, respectively. Both ends of the pedal body 191 are connected to the connection portions 1921 on opposite sides, respectively. The two engaging portions 1922 of each engaging member 192 are capable of being engaged with the opposite guide slots 8111 in an inserted manner and sliding along the guide slots 8111, thereby driving the footrest 190 to move in the height direction.

In particular, as shown in fig. 45 and 46, a locking assembly 830 is provided between the forefoot support assembly 810 and the foot pedal 190, the locking assembly 830 being switchable between a locked state and an unlocked state. With the locking assembly 830 in the locked state, the foot pedal 190 can be fixed at a height position relative to the forefoot support assembly 810, and the foot pedal 190 can be operated to move in the first direction D1. With the locking assembly 830 in the unlocked state, the foot pedal 190 can be operated to move in either the first direction D1 or the second direction D2. Wherein the first direction D1 and the second direction D2 are opposite and both parallel to the height direction. In the present embodiment, the upward direction along the guide groove 8111 is referred to as a first direction D1, and the downward direction along the guide groove 8111 is referred to as a second direction D2. Of course, in other embodiments, the reverse may be true, i.e., with the first direction D1 being the downward direction along the guide slot 8111, and the second direction D2 being the upward direction along the guide slot 8111.

Specifically, as shown in fig. 45 and 46, the locking assembly 830 includes an operation member 831, two locking members 832, two linkage members 833, a first restoring member 834, two second restoring members 835, a plurality of first locking grooves 836, a plurality of second locking grooves 837, and a plurality of third locking grooves 838. The operation member 831 is operatively disposed at a substantially middle portion of the pedal plate 190, the first reset member 834 is disposed between the operation member 831 and the pedal plate 190, the two linkage members 833 are respectively connected to two sides of the operation member 831, the two locking members 832 are respectively connected to one side of the two linkage members 833 away from the operation member 831, and the two second reset members 835 are respectively disposed between the two locking members 832 and the pedal plate 190. A plurality of first locking grooves 836 and a plurality of second locking grooves 837 are provided on the two guides 811, respectively.

The structure of the height adjusting mechanism 800 will be described in detail below taking the connection structure between the left-side forefoot support assembly 810 and the footrests 190, 830 as an example, and the connection structure between the right-side forefoot support assembly 810 and the footrests 190, 830 is similar to the above:

Further, as shown in fig. 46, the inner side of the guide 811, that is, the side of the guide 811 opposite to the other guide 811 is provided with a plurality of first locking grooves 836, and the plurality of first locking grooves 836 are arranged in the height direction. The plurality of first locking grooves 836 are unidirectional locking grooves for restricting movement of the foot pedal 190 in the second direction D2. Specifically, the depth of each first locking groove 836 gradually decreases to zero in the first direction D1. Specifically, the groove top wall of each first locking groove 836 is a first abutment inclined surface 8361, and the first abutment inclined surface 8361 is gradually inclined toward the opposite side guide 811 along the first direction D1. The bottom wall of each first locking groove 836 is a limiting wall 8362, the limiting wall 8362 is substantially perpendicular to the guide 811, i.e. the limiting wall 8362 is substantially parallel to the horizontal plane, and the limiting wall 8362 is used to limit the movement of the footrest 190 in the second direction D2.

At least one second locking groove 837 is also provided on the inner side of the guide 811, i.e. on the side of the guide 811 opposite to the other guide 811. The second locking groove 837 is a bidirectional locking groove for restricting the movement of the foot board 190 in the first direction D1 and the second direction D2. The second locking groove 837 has a first spacing sidewall 8371 and a second spacing sidewall 8372 at both ends in the height direction, respectively. At least one second locking groove 837 is located in the first direction D1 of the plurality of first locking grooves 836. In this embodiment, two first locking grooves 836 and one second locking groove 837 are provided on the inner side of each guide 811. The second locking grooves 837 are located above the two first locking grooves 836 for limiting a movement stroke of the foot board 190 to the first direction D1, i.e., upward movement, that is, the second locking grooves 837 have a limiting function of limiting excessive upward movement of the foot board 190. Of course, in other embodiments, the number of the first locking grooves 836 and the second locking grooves 837 may be adjusted as needed, or only a plurality of the first locking grooves 836 may be provided without providing the second locking grooves 837.

As shown in fig. 45 and 48, a third locking groove 838 is provided on the inner side of the guide 811, i.e., on the side of the guide 811 opposite the other guide 811. The third locking groove 838 is located in the second direction of the plurality of first locking grooves 836, i.e., below the plurality of first locking grooves 836. The third locking groove 838 has a second push inclined surface 8381, the second push inclined surface 8381 gradually inclined toward the guide 811 on the opposite side in the first direction or the second direction, and the third locking groove 838 further has a mounting opening 8382 opposite to the second push inclined surface 8381. When the locking member 832 is in the locked state, the locking member 832 at least partially protrudes out of the footrest 190 (as shown in fig. 46). When the foot pedal 190 is mounted on the front foot support assembly 810, the locking member 832 is inserted into the third locking slot 838 through the mounting opening 8382, so that the foot pedal 190 can be conveniently mounted on the front foot support assembly 810.

Further, as shown in fig. 45 and 48, the height adjustment mechanism 800 may further include a stopper 850 having a substantially elongated tubular structure, and both ends of the stopper 850 are respectively fixed to opposite inner sides of the two forefoot supporting members 161 and 162. The stop 850 is located in the second direction of the third locking slot 838, i.e., the stop 850 is located below the third locking slot 838. When the lock 832 is inserted into the third lock slot 838, the foot pedal 190 abuts the stopper 850 to restrict the foot pedal 190 from moving in the second direction.

In this embodiment, as shown in fig. 45 and 48, the front foot support bar 161 or 162 includes a support bar main body 163 and a wheel seat connecting portion 164, and both ends of the stopper 850 are respectively fixed to the wheel seat connecting portions 164 of the two front foot support bars. In the mounting process of the carrier, the locking pieces 832 at least partially protruding from both sides of the pedal plate 190 may be inserted into the third locking slot 838 through the mounting opening 8382 to mount the pedal plate 190 between the two support rod main bodies 163, and then the two wheel seat connecting portions 164 connected with the limiting pieces 850 are respectively mounted on the lower ends of the two support rod main bodies 163, so that the limiting pieces 850 are located below the third locking slot 838. In this way, when the lock 832 is inserted into the third lock groove 838, the foot pedal 190 can abut against the stopper 850 to restrict the foot pedal 190 from moving in the second direction.

Further, as shown in fig. 46 and 47, the foot board 190 has a hollow inner cavity 193, and the lock 832 and the link 833 are movably provided in the hollow inner cavity 193. The locking member 832 is generally pin-like in configuration. The linkage 833 is generally rod-shaped in configuration and has a first end 8331 and a second end 8332. One end of the locking member 832 can extend out of the hollow cavity 193 to be inserted into engagement with the first locking groove 836 or the second locking groove 837, and the other end of the locking member 832 is fixedly coupled to the second end 9332 of the linkage member 833. The first end 8331 of the linkage member 833 is connected to the operation member 831. The operation member 831 is operatively disposed on the foot pedal 190, at least a portion of the operation member 831 extends into the hollow interior 193 to connect with the linkage member 833, and another portion of the operation member 831 extends out of the hollow interior 193 to be operated.

Specifically, as shown in fig. 46 and 47, the lock 832 is switchable between a lock position and a release position, when the lock 832 is in the lock position, the lock 832 can be inserted into engagement with any one of the plurality of first lock grooves 836 or any one of the at least one second lock grooves 837, and when the lock 832 is in the release position, the lock 832 can be released from engagement with the plurality of first lock grooves 836 or the at least one second lock groove 837.

Further, as shown in fig. 46 and 47, the operation member 831 can be operated to switch from the lock position to the release position by driving the lock member 832 through the link 833. The operating member 831 is provided with two driving grooves 8311. Specifically, the extending direction of each driving slot 8311 is staggered with the moving direction of the operating member 831 and the moving direction of the locking member 832, respectively, and the first end 8331 of the linkage member 833 is inserted into the driving slot 8311 and can move along the driving slot 8311. In this embodiment, the first end 8331 of the linkage 833 may be provided with a driving pin (not shown in the drawings) inserted into the driving groove 8311 to move along the driving groove 8311. As shown in fig. 46, the driving groove 8311 located at the left side of the operation member 831 is inclined in the direction D3 (i.e., the direction in which the operation member 831 can be pressed) toward the guide 811 near the corresponding side. The end of the driving groove 8311 near the guide 811 on the corresponding side is a first groove end 83111, and the end of the driving groove 8311 far from the guide 811 on the corresponding side is a second groove end 83112. When the operation member 831 is pressed in the D3 direction, the first end 8331 of the link 833 (or the driving pin at the first end 8331) is moved from the first slot end 83111 to the second slot end 83112 of the driving slot 8311, so that the link 833 and the lock 832 are moved together in a direction away from the guide 811 on the corresponding side, thereby switching the lock 832 from the lock position to the unlock position.

Further, as shown in fig. 46, a first restoring member 834 is provided between the operating member 831 and the pedal 190, and the first restoring member 834 is configured to bias the operating member 831 such that the operating member 831 moves in a direction in which the locking member 832 moves to the locking position. In this embodiment, the first restoring member 834 is a spring, and the first restoring member 834 is configured to provide an elastic force for restoring the operating member 831. Specifically, a first mounting post 194 is disposed within the hollow interior 193 of the foot pedal 190. The operating member 831 is provided with a mounting cavity 8312 in communication with the hollow interior 193, a second mounting post 8313 is provided in the mounting cavity 8312 opposite to the first mounting post 194, and the first mounting post 194 is located in the D3 direction of the second mounting post 8313. The two ends of the first restoring member 834 are respectively sleeved outside the first mounting post 194 and the second mounting post 8313, so as to prevent the first restoring member 834 from shifting.

Further, as shown in fig. 46 and 47, a second return member 835 is provided between the lock member 832 and the pedal plate 190, and the second return member 835 is configured to bias the lock member 832 to move the lock member 832 toward the locked position. In this embodiment, the second restoring member 835 is a spring, and the second restoring member 835 is configured to provide an elastic force for restoring the locking member 832 to the locking position. Specifically, the portion of the hollow cavity 190 of the foot board 190 where the locking member 832 is installed is provided with a first boss 195, the locking member 832 is annularly provided with a second boss 8321 opposite to the first boss 195, and the second boss 8321 is located on a side of the first boss 195 close to the guide member 811. The second restoring member 835 is sleeved outside the locking member 832, and two ends of the second restoring member 835 respectively abut against the first boss 195 and the second boss 8321, so as to prevent the second restoring member 835 from shifting.

In the above embodiment, the height adjustment process of the foot pedal 190 is as follows:

As shown in fig. 46 and 47, if the height of the foot pedal 190 is to be increased, it is assumed that the foot pedal 190 is at the height position shown in fig. 46, that is, the locking piece 832 on the foot pedal 190 is inserted into the first locking groove 836 at the highest position, at this time, the foot pedal 190 may be directly pushed in the first direction D1, so that the locking piece 832 on the foot pedal 190 gradually moves away from the guiding piece 811 at the corresponding side (for example, the locking piece 832 at the left side shown in fig. 46, that is, moves toward the D4 direction) under the action of the first pushing inclined surface 8361 in the first locking groove 836 (if the locking piece 832 is inserted into the third locking groove 838 at this time, under the action of the second pushing inclined surface 8381), and the second resetting piece 835 gradually is compressed. When the locking member 832 moves to the uppermost end of the first pushing inclined surface 8361, i.e. the locking member 832 has moved out of the first locking groove 836, the locking member 832 is at the unlocking position, and at this time, as the pedal 190 is pushed further toward the first direction D1, the locking member 832 keeps at the unlocking position under the pushing action of the inner side of the guiding member 811. When the lock member 832 moves to be opposite to the second lock groove 837 along with the pedal plate 190, the lock member 832 which loses the pushing action of the inner side of the guide member 811 is restored to the lock position by the second restoring member 835 and inserted into the second lock groove 837. In this manner, the foot pedal 190 is fixed at a high elevation. It should be appreciated that since the second locking groove 837 is a bi-directional locking groove, the foot pedal 190 in this height position cannot continue to move in the first direction D1 even if it is pushed further in the first direction D1 due to the restriction of the first limit sidewall 371. However, if the locking member 832 is inserted into any of the first locking grooves 836 at this time, the foot board 190 can still be pushed in the first direction D1 and moved in the first direction D1. Meanwhile, in the above process, when the locking member 832 moves from the locking position to the releasing position along the first pushing inclined plane 8361, the locking member 832 is fixedly connected with the linkage member 833, and the linkage member 833 will also move in the direction D4 (taking the left linkage member 833 shown in fig. 46 as an example) under the driving of the locking member 832, and the operation member 831 is driven to move in the direction D3 by the second end 8332 (or the locking pin at the second end 8332), so that the first reset member 834 is compressed.

As shown in fig. 46 and 47, if the height of the foot pedal 190 is to be lowered, assuming that the foot pedal 190 is at the height position shown in fig. 46, i.e., the locking member 832 on the foot pedal 190 is inserted into the first locking groove 836 at the highest position, the operating member 831 is to be pressed in the direction D3, so that the first end 8331 (or the locking pin at the first end 8331) of the locking member 833 moves along the driving groove 8311 from the first groove end 83111 to the second groove end 83112, so that the locking member 833 moves in the direction D4 (for example, the left locking member 833 shown in fig. 46), and simultaneously drives the locking member 832 to move in the direction D4 together (for example, the left locking member 832 shown in fig. 46), i.e., drives the locking member 832 to move in the direction away from the guiding member 811 at the corresponding side. When the locking member 832 is moved from the locking position to the unlocking position, the locking member 832 is disengaged from the first locking groove 836 of the highest position. At this time, the foot pedal 190 may be pulled in the second direction D2 at the same time, i.e., the foot pedal 190 may be moved downward. When the foot pedal 190 moves to be opposite to any of the other first locking grooves 836, the operation member 831 can be released. The operation member 831 is reset under the action of the first reset member 834, and drives the linkage member 833 to move in the opposite direction to the D4 direction (for example, the left linkage member 833 shown in fig. 46). The locking member 832 is driven by the linkage member 833 and the elastic force of the second restoring member 835, and returns to the locking position from the unlocking position, so that the locking member 832 is reinserted in any other first locking groove 836. In this manner, the foot pedal 190 is fixed at a low positional height.

As shown in fig. 49 to 51, another embodiment of the present utility model further provides another height adjustment mechanism 800, wherein the height adjustment mechanism 800 includes a front foot support assembly 810, a foot pedal 190, a locking assembly 830 and a locking member 860. The structure of the forefoot supporting assembly 810 and the locking assembly 830 is the same as that of the first embodiment, and the difference is that in the present embodiment, the foot rest 190 and the locking member 860 are two independent components, whereas in the previous embodiment, the foot rest 190 includes a pedal body 191 and a locking member 192, and the pedal body 191 and the locking member 192 are integrally formed.

As shown in fig. 50 and 51, two locking members 860 are respectively connected to both sides of the pedal plate 190. The engaging piece 860 and the foot board 190 will be specifically described below taking the structure of the foot board 190 side as an example:

The clamping piece 860 comprises a clamping body 861 and a connecting part 862 which are connected with each other and are arranged at an included angle, and the clamping body 861 is at least partially inserted into the guide groove 8111 and can slide along the guide groove 8111. Specifically, the side of the clamping body 861 facing away from the connecting portion 862 is provided with two mating portions 8612 disposed opposite to each other, and the clamping piece 860 can be in clamping fit with the guide groove 8111 on the guide 811 through the two mating portions 8612 and can slide along the guide groove 8111. The clamping body 861 is provided with a through hole 8611. One end of the foot pedal 190 is provided with a recess 196 and the lock 832 is capable of extending from the recess 196 into the hollow cavity 193 when the lock 832 is in the locked position. The connecting portion 862 can be inserted into the recess 196 to connect the clip 860 to the foot pedal 190, and the locking member 832 can extend from the recess 196 through the hollow cavity 193 and be inserted into either the first locking channel 836 or the second locking channel 837 through the through hole 9611 when the locking member 832 is in the locked position.

Of course, in other embodiments not shown, the guide 811 may be omitted, the guide slot 8111 may be directly provided on the forefoot support bars 161, 162, and the engaging piece 860 may be directly engaged with the guide slot 8111 of the forefoot support bars 161, 162 through the two engaging portions 8612.

In this embodiment, the locking member 860 is telescopically or movably connected to the pedal plate 190. As shown in fig. 49 and 51, since the connecting portions 862 have a certain length in the horizontal direction, when the two connecting portions 862 are respectively inserted into the recesses 196 provided at both ends of the footboard 190, the footboard 190 can be moved in a direction approaching or separating from the forefoot supporting assembly 810 or the clamping body 861 at either side, i.e., the footboard 190 can be moved in a certain range in the horizontal direction. In this way, the width of the foot pedal area (the foot pedal area refers to the sum of the horizontal dimension of the foot pedal 190 and the horizontal dimension of the connecting portion 862 exposed outside the foot pedal 190) is adjusted by inserting the connecting portion 862 into the foot pedal 190 at different depths, so that on one hand, the problem of unsmooth adjustment of the height of the foot pedal 190 due to the difference in width between the two guide members 811 of different vehicles caused by the machining tolerance of the two front foot support assemblies 810 can be solved, and on the other hand, when the front foot support assemblies 810 are inclined, i.e., the front foot support rods 161, 162 or the guide members 811 are inclined, and when the upper included angle α (as shown in fig. 49) between the front foot support rods 161, 162 and the foot pedal 190 is smaller than 90 degrees, the problem of unsmooth sliding of the foot pedal 190 caused by the difference in the bottom and top pitches of the two sets of front foot support rods 161, 162 of the vehicles can be solved.

The height adjusting mechanism 20 and the carrier have at least the following advantages:

In the height adjusting mechanism 20 for a vehicle, the locking assembly 830 is disposed between the front foot supporting assembly 810 and the foot rest 190, when the locking assembly 830 is in the locked state, the foot rest 190 can be fixed at a certain height relative to the front foot supporting assembly 810, and when the foot rest 190 is operated, the foot rest 190 can move along the first direction D1 parallel to the height direction, and when the locking assembly 830 is in the unlocked state, the foot rest 190 can move along the first direction D1 or can move along the second direction D2 opposite to the first direction D1. That is, the locking assembly 830 can unidirectionally lock the foot pedal 190 in the height direction such that a user only needs to unlock the locking assembly 830 when moving the foot pedal 190 in the second direction D2, but does not need to unlock the locking assembly 830 when moving the foot pedal 190 in the first direction D1. The height adjusting mechanism 20 is simple in structure and convenient to operate.

In the height adjusting mechanism 20 according to another embodiment of the present utility model, when there is a machining tolerance between the two front foot support assemblies 810 or the two front foot support rods 161, 162 are inclined, the height of the foot rest 190 can be adjusted by the clamping member 400, and meanwhile, the width of the foot rest 190 can be adjusted to adapt to children of different ages, or the problem of unsmooth adjustment of the foot rest 190 can be solved.

The technical features of the embodiments of the above aspects may be combined arbitrarily, and for brevity of description, all of the possible combinations of the technical features of the embodiments of the above aspects are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A carrier for a vehicle, which comprises a carrier body, characterized by comprising the following steps:

A backrest assembly;

a frame switchable between a collapsed state and an expanded state;

a seat assembly movably arranged on the frame, and

The connecting rod assembly is respectively and movably connected with the frame, the seat assembly and the backrest assembly, wherein the connecting rod assembly comprises a first connecting rod and a second connecting rod which are movably connected, and the backrest assembly is movably connected with the seat assembly through the first connecting rod and the second connecting rod;

When the frame is switched from the unfolding state to the folding state, the backrest component can be driven to fold in the direction approaching to the seat component through the first connecting rod and the second connecting rod.

2. The vehicle of claim 1, wherein the link assembly includes a first link having a first movable portion movably coupled to the seat assembly and a first pivot portion pivotally coupled to the frame, and a second link having a second movable portion movably coupled to the first link and a second pivot portion pivotally coupled to the back assembly.

3. The carrier of claim 2, wherein the first link has a driving slot, the driving slot is located between the first movable portion and the first pivot portion, and the second movable portion is inserted into the driving slot and is capable of sliding along the driving slot.

4. The vehicle of claim 2, wherein the frame includes a seat tube extending in a fore-aft direction of the vehicle, the seat assembly including a movable frame slidably disposed on the seat tube;

The movable frame is provided with a connecting part, the connecting part is provided with a guide groove, and the first movable part is inserted into the guide groove and can move along the guide groove.

5. The carrier according to claim 4, wherein the guide groove includes a first groove portion and a second groove portion which are communicated with each other, the first groove portion extending along a moving direction of the movable frame, the second groove portion extending in a direction intersecting with the extending direction of the first groove portion, and/or

The guide groove is provided with a first end and a second end, when the frame is in a unfolded state, the first movable part is positioned at the first end, and when the frame is in a folded state, the first movable part is positioned at the second end.

6. The vehicle of claim 4, wherein the backrest assembly comprises a first backrest frame, a second backrest frame, and a backrest tube, the first end of the first backrest frame being pivotally connected to the second pivot portion of the second link, the second end of the first backrest frame being pivotally connected to the first end of the second backrest frame, the second end of the second backrest frame being pivotally connected to the first end of the backrest tube, the second end of the backrest tube, a portion of the second link between the second movable portion and the second pivot portion, and the movable frame being pivotally connected by a first connecting shaft.

7. The carrier according to claim 4, wherein the connecting portion is provided with a notch, the guide groove is provided on and penetrates one or both side groove walls of the notch, and the first movable portion extends into the connecting portion through the notch and is slidably connected to the guide groove.

8. The carrier of claim 4, wherein the frame includes a pusher frame pivotally coupled to the seat tube, the pusher frame being operable to rotate relative to the seat tube to switch a direction of travel of the carrier between a first direction of travel and a second direction of travel, the pusher frame moving the movable frame along the seat tube in the first direction of travel and/or the first link in the second direction of travel when the direction of travel of the carrier is switched from the first direction of travel to the second direction of travel.

9. The carrier according to claim 4, wherein the movable frame has a clamping portion, the clamping portion is in clamping engagement with the second movable portion when the frame is in the unfolded state, and/or the frame includes a pushing frame pivotally connected to the seat tube, and the clamping portion is out of engagement with the second movable portion during rotation reversing of the pushing frame.

10. The vehicle according to claim 6, wherein the backrest assembly further comprises a connection strap and strap adjuster, the link assemblies are provided on both left and right sides of the frame, one end of the connection strap is connected to the second link of the link assembly on one side of the frame, the other end of the connection strap is connected to the second link of the link assembly on the other side of the frame, bypassing a side of the backrest tube facing away from the seat assembly, and the strap adjuster is provided on the connection strap for adjusting a length of the connection strap.

11. The carrier of claim 10, wherein the second link includes a first rod portion and a second rod portion connected to each other, the first rod portion and the second rod portion forming an included angle with each other, the second movable portion being located at an end of the first rod portion remote from the second rod portion, the second pivoting portion being located at the second rod portion, the connecting strap being connected to an end of the second rod portion remote from the first rod portion and being located at a side of the second pivoting portion remote from the first rod portion.

12. The carrier of claim 6, wherein the back assembly further comprises a limiting tab pivotally connected between the back tube and the second link via the first connecting shaft.

13. The carrier of claim 6, wherein the second link includes a first rod portion and a second rod portion that are connected to each other, the first rod portion and the second rod portion form an included angle with each other, the second movable portion is located at an end portion of the first rod portion that is away from the second rod portion, the second pivot portion is located at the second rod portion, and the first connecting shaft is located at a connection portion between the first rod portion and the second rod portion.

14. The vehicle of claim 1, wherein the frame comprises a handle frame and an auxiliary frame movably connected with the handle frame, the link assembly is pivotally connected with the auxiliary frame, the handle frame is operable to fold the frame by driving the frame and to fold the backrest assembly in a direction approaching the seat assembly by driving the link assembly through the auxiliary frame and the seat assembly.