TW202448734A - Frame and stroller - Google Patents

Abstract

The present disclosure relates to a frame and a stroller. The stroller includes the frame. The frame includes: a first wheel frame including a first support assembly; a second wheel frame including a second support assembly; a push rod frame including a push rod assembly; and a folding mechanism including a linkage assembly and a rotating shaft. The first support assembly and the second support assembly, and the push rod assembly are pivotally connected by the rotating shaft. The first support assembly and the second support assembly are capable of being rotated and folded relative to the push rod assembly by the linkage assembly.

Description

Carriages and carts

The present invention relates to the technical field of children's carriages, and in particular to a frame and a stroller.

At present, strollers with a high field of view are becoming more and more popular among consumers. Such strollers can provide children with a better viewing field. However, the overall folding of the frame of such strollers with a high field of view is not convenient. In addition, in order to improve the riding experience of children, the seat of such strollers needs to be able to switch back and forth; at the same time, in order to meet the needs of cleaning, storage or transportation, the seat and frame of the stroller also need to be able to be disassembled. At present, strollers also generally have the following problems: the switching structure used to achieve the switching of the front and rear seats is complicated and inconvenient to operate.

According to various embodiments of the present invention, a frame, a seat locking device and a stroller are provided.

A frame includes: a first wheel frame including a first support assembly; a second wheel frame including a second support assembly; a push rod frame including a push rod assembly; and a folding mechanism including a linkage assembly and a rotating shaft. The first support assembly, the second support assembly and the push rod assembly are pivotally connected via the rotating shaft, and the first support assembly and the second support assembly can be folded and rotated relative to the push rod assembly via the linkage assembly.

According to one embodiment, the push rod frame further includes a grip assembly, and the folding mechanism further includes a release assembly, wherein the grip assembly is drivingly connected to the release assembly, and the grip assembly can be operated to drive the release assembly to release, so that the first support assembly and the second support assembly can be rotated and folded relative to the push rod assembly through the linkage assembly.

A frame includes a first wheel frame, a second wheel frame, a push rod frame and a folding mechanism. The push rod frame is pivotally connected with the first wheel frame and the second wheel frame and has a handle. The folding mechanism has a release assembly, and the handle is drivingly connected to the release assembly. The handle can be operated to drive the release assembly to release, so that the first wheel frame, the second wheel frame and the push rod frame are rotated and folded by the folding mechanism.

According to one embodiment, the first wheel frame includes a first support assembly, the second wheel frame includes a second support assembly, the push rod frame includes a push rod assembly, the first support assembly, the second support assembly and the push rod assembly are pivotally connected via a rotating shaft, the folding mechanism includes a linkage assembly, the first support assembly and the second support assembly are movably connected to the push rod assembly via the linkage assembly, and the first support assembly and the second support assembly can be folded relative to the push rod assembly by rotating the linkage assembly.

According to one embodiment, the linkage assembly includes a first link, a second link, and a third link. One end of the first link is rotatably connected to the push rod assembly. One end of the second link is rotatably connected to the other end of the first link, and the other end of the second link is rotatably connected to the first support assembly. One end of the third link is rotatably connected to the other end of the first link, and the other end of the third link is rotatably connected to the second support assembly.

According to one embodiment, the linkage assembly includes a center gear, a rotating disk, a planetary gear and a drive shaft. The center gear is fixed to the push rod assembly. The rotating disk is fixed to the first support assembly and has a first guide groove, and the first guide groove has a toothed edge. The planetary gears are engaged with the center gear and the toothed edge. The drive shaft is eccentrically arranged with the rotating shaft, and the drive shaft passes through the second support assembly, the planetary gear and the push rod assembly, and the second support assembly is pivotally connected with the push rod assembly through the drive shaft.

According to one embodiment, the drive shaft is fixedly connected to the second support assembly and the planetary gear, and the drive shaft can rotate relative to the push rod assembly.

According to one embodiment, the toothed edge is an arc-shaped edge and is arranged along the circumferential direction of the turntable.

According to one embodiment, the toothed edge has a first end and a second end for limiting the movement of the planetary gear between the first end and the second end.

According to one embodiment, the first supporting assembly includes a first rotating seat, the second supporting assembly includes a second rotating seat, the push rod assembly includes a pivot seat, and the first rotating seat, the second rotating seat and the pivot seat are pivotally connected through the rotating shaft.

According to one embodiment, the first wheel frame includes two first support assemblies arranged opposite to each other, the second wheel frame includes two second support assemblies arranged opposite to each other, the push rod frame includes a push rod assembly, the two first support assemblies, the two second support assemblies and the push rod assembly are pivotally connected through a rotating shaft, the folding mechanism includes two connecting assemblies, each of the first support assemblies and each of the second support assemblies are movably connected to the push rod assembly through one of the connecting assemblies, and each of the first support assemblies and each of the second support assemblies can be folded and rotated relative to the push rod assembly through the corresponding connecting assembly.

According to one embodiment, each of the first supporting assemblies includes a first rotating seat, each of the second supporting assemblies includes a second rotating seat, and the push rod assembly includes a pivot seat. The two first rotating seats are pivotally connected to the two sides of the pivot seat through the rotating shaft, and the two second rotating seats are pivotally connected to the sides of the two first rotating seats away from the pivot seat through the rotating shaft.

According to one embodiment, the first supporting assembly includes a first rotating seat, the first rotating seat has a locking recess, and the releasing assembly includes a locking piece. When the releasing assembly is in a locking state, the locking piece is inserted into the locking recess so that the push rod assembly and the first supporting assembly are fixed relative to each other. When the releasing assembly is in a releasing state, the locking piece is disengaged from the locking recess so that the push rod assembly can rotate relative to the first supporting assembly.

According to one embodiment, the release assembly further includes a driving member and a pulling member. The driving member is disposed on the push rod frame and is drivingly connected to the grip assembly. The two ends of the pulling member are respectively connected to the driving member and the locking member. The grip assembly can be operated to drive the driving member to move, thereby driving the locking member to disengage from the locking recess through the pulling member.

According to one embodiment, the grip assembly includes a grip and a grip body, the grip is rotatably disposed on the grip body, and the drive member is connected to the grip and can rotate with the grip.

According to one embodiment, the release assembly further includes a first reset member, the two ends of which are respectively against the locking member and the push rod assembly, and the first reset member is suitable for biasing the locking member so that the locking member moves in the direction of being inserted into the locking recess.

According to one embodiment, the release assembly further includes a safety release member, which is movable between a first position and a second position. When the safety release member is in the first position, the handle cannot be operated to activate the drive member, and when the safety release member is in the second position, the handle can be operated to activate the drive member.

According to one embodiment, the release assembly further includes a limiter, which is movably disposed on the push rod frame. When the safety release is in the first position, the limiter limits the movement of the drive member; when the safety release is in the second position, the limiter releases the limit on the movement of the drive member, and the safety release can be operated to move from the first position to the second position.

According to one embodiment, the release assembly further includes a second reset member, two ends of which are respectively against the driving member and the limiting member, and the second reset member is suitable for biasing the limiting member so that the limiting member moves in a direction that limits the movement of the driving member.

According to one embodiment, the grip assembly includes two grips and a grip body, and the two grips are rotatably disposed on the grip body, and the release assembly further includes two driving members and two pulling members. The two driving members are both disposed on the push rod frame and are drivingly connected to the two grips, respectively. The two ends of each pulling member are respectively connected to one of the driving members and the locking member. Any of the grips can be operated to drive the corresponding driving member to move, thereby driving the locking member to disengage from the locking recess through the corresponding pulling member.

According to one embodiment, the release assembly further includes a safety release member, which is movable between a first position and a second position, and there are two second positions, which are respectively located on both sides of the first position. When the safety release member is in the first position, both handles cannot be operated to activate the drive member, and when the safety release member is in any of the second positions, one of the handles can be operated to activate the drive member.

According to an embodiment, the release assembly further includes two limiters, which are movably disposed on the push rod frame. When the safety release is in the first position, the two limiters can respectively limit the movement of the two driving members; when the safety release is in any of the second positions, one of the limiters can release the restriction on the movement of one of the driving members, and the safety release can be operated to move from the first position to the second position.

According to one embodiment, the release assembly further includes two second reset members, and the two ends of each of the second reset members are respectively abutted against one of the driving members and one of the limiting members, and each of the second reset members is suitable for biasing the corresponding limiting member so that the corresponding limiting member moves in the direction of limiting the movement of the corresponding driving member.

A stroller comprises a frame, a seat frame and a seat assembly as described in any one of the above embodiments. The seat frame is arranged on the push rod frame. The seat assembly is arranged on the seat frame.

According to one embodiment, the push rod frame has a push rod assembly, the seat frame is movable along the push rod assembly, and the cart further includes a seat height adjustment mechanism arranged between the push rod frame and the seat frame, the seat height adjustment mechanism has a locked state and a released state, when the seat height adjustment mechanism is in the locked state, the seat frame and the push rod assembly are fixed relative to each other, when the seat height adjustment mechanism is in the released state, the seat frame can move relative to the push rod assembly to make the height of the seat assembly adjustable.

According to one embodiment, the stroller further includes a seat height adjustment mechanism disposed between the push rod frame and the seat frame, the seat height adjustment mechanism including a plurality of first locking holes and a first locking pin. The plurality of first locking holes are disposed on the push rod assembly. The first locking pin is disposed on the seat frame, and the first locking pin is movable between a third position and a fourth position. The first locking pin can be inserted and matched with one of the first locking holes when it is located at the third position, and the first locking pin is released from the first locking hole when it is located at the fourth position.

According to one embodiment, the seat height adjustment mechanism of the first locking pin further includes a height adjustment operating member. The height adjustment operating member includes a pivot end and an operating end. The pivot end is pivotally connected to the first locking pin. The operating end can be operated to drive the first locking pin to move to the fourth position through the pivot end.

According to one embodiment, the seat height adjustment mechanism further includes a third reset member, two ends of which are respectively abutted against the height adjustment operating member and the seat frame, and the third reset member is suitable for biasing the height adjustment operating member to move the first locking pin toward the third position.

According to one embodiment, the push rod frame has a push rod assembly, and the length of the push rod assembly is adjustable.

According to one embodiment, the push rod further comprises a push rod length adjustment mechanism, the push rod assembly comprises a first push rod and a second push rod, the first push rod is at least partially inserted into the second push rod, and the push rod length adjustment mechanism comprises a plurality of second locking holes and a second locking pin. The plurality of second locking holes are provided on the second push rod. The second locking pin is provided on the first push rod and is movable between a fifth position and a sixth position. The second locking pin can be inserted and matched with one of the second locking holes when it is located at the fifth position, and the second locking pin is released from the second locking hole when it is located at the sixth position.

According to one embodiment, the push rod length adjustment mechanism includes a length adjustment operating member, which is disposed on the first push rod and drivingly connected to the second locking pin. The length adjustment operating member can be operated to drive the second locking pin to move to the sixth position.

According to one embodiment, the push rod length adjustment mechanism includes a fourth reset member, which is suitable for biasing the second locking pin to move the second locking pin toward the fifth position.

According to one embodiment, the seat assembly can be rotated relative to the seat frame.

According to one embodiment, the stroller further includes a connecting seat and a first locking mechanism. The connecting seat is disposed on the seat assembly, and the connecting seat is movably connected to the seat frame. The connecting seat has a first moving position and a second moving position. When the connecting seat is in the first moving position, the connecting seat cannot rotate relative to the seat frame. When the connecting seat is in the second moving position, the connecting seat can rotate relative to the seat frame. The first locking mechanism can be switched between a release state and a locking state. When the first locking mechanism is in the release state, the connecting seat can move relative to the seat frame between the first moving position and the second moving position; when the first locking mechanism is in the locking state, the connecting seat cannot move relative to the seat frame.

According to one embodiment, the seat frame is provided with a guide rail, and a first guide groove is provided on a side of the connecting seat facing the seat frame. The connecting seat can move along the guide rail between the first moving position and the second moving position through the engagement of the first guide groove and the guide rail. When the connecting seat is in the first moving position, the first guide groove engages with the guide rail, so that the connecting seat cannot rotate relative to the seat frame; when the connecting seat is in the second moving position, the first guide groove disengages from the guide rail, so that the connecting seat can rotate relative to the seat frame.

According to an embodiment, the first locking mechanism includes a reversing release member, which is operably disposed between the seat frame and the connecting seat, and the reversing release member can be switched between a reversing release position and a reversing locking position. When the reversing release member is in the reversing locking position, the reversing release member abuts against the guide rail, so that the reversing release member cannot move along the guide rail, thereby limiting the connecting seat from moving along the guide rail; when the reversing release member is in the reversing release position, the reversing release member can move along the guide rail, so that the connecting seat can move relative to the seat frame.

According to one embodiment, the guide rail has a switching recess, and when the connecting seat is in the first moving position, the reversing release member is inserted into the switching recess, and the reversing release member moves relative to the guide rail in a direction intersecting with the extension direction of the guide rail to switch between the reversing release position and the reversing lock position.

According to one embodiment, the reversing release member has a strip-shaped positioning groove, and the first locking mechanism also includes a positioning pin, which can be inserted and matched with the positioning groove, so that the reversing release member can move relative to the positioning pin in a direction intersecting with the extension direction of the guide rail, and can move synchronously with the positioning pin along the extension direction of the guide rail.

According to one embodiment, the first locking mechanism further includes a reversing reset member, which is suitable for biasing the reversing release member so that the reversing release member moves toward the reversing locking position.

According to one embodiment, the cart further comprises a movable reset member, which is adapted to bias the connecting seat so that the connecting seat moves toward the first movable position.

According to one embodiment, the stroller further includes a movable reset member and a movable column, wherein the movable column is connected between the connecting seat and the seat frame, the movable column is movable relative to the seat frame, the movable reset member is respectively connected to the movable column and the seat frame, and the movable reset member is suitable for biasing the movable column to move the connecting seat toward the first moving position.

According to one embodiment, the guide rail is provided with a rotation recess for the connecting seat to rotate. When the connecting seat is in the second moving position, the first guide groove is located at the rotation recess, so that the connecting seat can rotate relative to the seat frame.

According to one embodiment, the stroller further includes a movable seat, and the connecting seat is connected to the seat frame via the movable seat. When the first locking mechanism is in a released state, the movable seat is movable relative to the seat frame and can drive the connecting seat to move between the first moving position and the second moving position, so that when the connecting seat is in the second moving position, the connecting seat can rotate relative to the seat frame; when the first locking mechanism is in a locked state, the movable seat is fixed relative to the seat frame.

According to one embodiment, the cart further includes a movable seat, the connecting seat is connected to the seat frame via the movable seat, the movable seat is provided with a second guide groove capable of engaging with the guide rail, when the first locking mechanism is in a released state, the movable seat can move along the guide rail through the cooperation between the second guide groove and the guide rail, and can drive the connecting seat to move between the first moving position and the second moving position; when the first locking mechanism is in a locked state, the movable seat is fixed relative to the seat frame.

A seat locking device is used to connect a vehicle frame and a seat assembly, the seat locking device comprising: a seat frame connected to the vehicle frame; a connecting seat arranged on the seat assembly, the connecting seat being movably connected to the seat frame, the connecting seat having a first moving position and a second moving position, when the connecting seat is in the first moving position, the connecting seat cannot rotate relative to the seat frame, and when the connecting seat is in the second moving position, the connecting seat can rotate relative to the seat frame.

According to one embodiment, the seat locking device also includes: a first locking mechanism, which can be switched between a release state and a locking state. When the first locking mechanism is in the release state, the connecting seat can move between the first moving position and the second moving position relative to the seat frame; when the first locking mechanism is in the locking state, the connecting seat cannot move relative to the seat frame.

According to one embodiment, the seat frame is provided with a guide rail, and a first guide groove capable of engaging with the guide rail is provided on a side of the connecting seat facing the seat frame. The connecting seat can move between the first moving position and the second moving position along the guide rail. When the connecting seat is in the first moving position, the first guide groove engages with the guide rail, so that the connecting seat cannot rotate relative to the seat frame; when the connecting seat is in the second moving position, the first guide groove disengages from the guide rail, so that the connecting seat can rotate relative to the seat frame.

According to an embodiment, the seat locking device further comprises a first locking mechanism, which comprises: a reversing release member operably disposed between the seat frame and the connecting seat, the reversing release member being switchable between a reversing release position and a reversing locking position. When the reversing release member is in the reversing locking position, the reversing release member abuts against the guide rail, so that the reversing release member cannot move along the guide rail, thereby limiting the connecting seat from moving along the guide rail; when the reversing release member is in the reversing release position, the reversing release member can move along the guide rail, so that the connecting seat can move relative to the seat frame.

According to one embodiment, the guide rail has a switching recess, and when the connecting seat is in the first moving position, the reversing release member is inserted into the switching recess, and the reversing release member moves relative to the guide rail in a direction intersecting with the extension direction of the guide rail to switch between the reversing release position and the reversing lock position.

According to one embodiment, the reversing release member has a reversing operating portion, and the reversing operating portion extends out of the connecting seat.

According to one embodiment, the reversing release member has a strip-shaped positioning groove, and the first locking mechanism also includes a positioning pin, which can be inserted and matched with the positioning groove, so that the reversing release member can move relative to the positioning pin in a direction intersecting with the extension direction of the guide rail, and can move synchronously with the positioning pin along the extension direction of the guide rail.

According to one embodiment, the first locking mechanism further includes a reversing reset member, which is suitable for biasing the reversing release member so that the reversing release member moves toward the reversing locking position.

According to one embodiment, the seat locking device further includes a movable reset member, which is suitable for biasing the connecting seat so that the connecting seat moves to the first moving position.

According to an embodiment, the seat locking device further comprises a movable reset member and a movable column. The movable column is connected between the connecting seat and the seat frame. The movable column is movable relative to the seat frame. The movable reset member is connected to the movable column and the seat frame respectively. The movable reset member is suitable for biasing the movable column to move the connecting seat to the first moving position.

According to one embodiment, the movable column is arranged away from the rotation axis of the connecting seat.

According to one embodiment, the seat frame has a third receiving groove, and a portion of the movable column and the movable reset member are received in the third receiving groove.

According to one embodiment, the guide rail is provided with a rotation recess for the connecting seat to rotate. When the connecting seat is in the second moving position, the first guide groove is located at the rotation recess 3121, so that the connecting seat can rotate relative to the seat frame.

According to one embodiment, the guide rail includes a first section and a second section, and a rotation recess is formed between the first section and the second section. When the connecting seat is in the second moving position, the first guide groove is located at the rotation recess, so that the connecting seat can rotate relative to the seat frame. When the connecting seat is in the first moving position, at least a portion of the first guide groove is engaged with the first section, so that the connecting seat cannot rotate relative to the seat frame.

According to an embodiment, the seat locking device further comprises a first locking mechanism and a movable seat, and the connecting seat is connected to the seat frame through the movable seat. When the first locking mechanism is in a released state, the movable seat is movable relative to the seat frame and can drive the connecting seat to move between the first moving position and the second moving position, so that when the connecting seat is in the second moving position, the connecting seat can rotate relative to the seat frame; when the first locking mechanism is in a locked state, the movable seat is fixed relative to the seat frame.

According to one embodiment, the seat frame is provided with a guide rail, and the movable seat is provided with a second guide groove capable of engaging with the guide rail. When the first locking mechanism is in a released state, the movable seat can move along the guide rail through the cooperation between the second guide groove and the guide rail, and can drive the connecting seat to move between the first moving position and the second moving position; when the first locking mechanism is in a locked state, the movable seat is fixed relative to the seat frame.

According to one embodiment, the seat locking device further includes a movable seat and a second locking mechanism, the connecting seat is connected to the seat frame through the movable seat, and the connecting seat is detachably connected to the movable seat through the second locking mechanism.

According to an embodiment, the movable seat is provided with a card slot, and the second locking mechanism includes: a separation locking member, which is movably provided on the connecting seat and has a hook portion. The separation locking member can be switched between a separation locking position and a separation release position. When the separation locking member is in the separation locking position, the hook portion is engaged with the card slot, and when the separation locking member is in the release position, the hook portion is released from the card slot.

According to one embodiment, the second locking mechanism further includes a separation release member, which is drivingly connected to the separation lock member, and the separation release member can be operated to drive the separation lock member to switch from the separation lock position to the separation release position.

According to one embodiment, the separation locking member includes a first separation locking member. One of the first separation locking member and the separation release member is provided with a first protrusion, and the other of the first separation locking member and the separation release member is provided with a first driving groove. The first protrusion is inserted and matched with the first driving groove to drive the first separation locking member to move between the separation locking position and the separation release position, and the extension direction of the first driving groove is parallel to the moving direction of the separation release member.

According to one embodiment, the separation locking member includes a second separation locking member. The second separation locking member is provided with a locking driving surface, and the separation release member is provided with a release driving surface. The release driving surface can abut against the locking driving surface to drive the second separation locking member to switch between the separation locking position and the separation release position. The extension direction of the release driving surface is staggered with the moving direction of the separation release member.

According to one embodiment, the second separation locking member is provided with a second protrusion. The side surface of the second protrusion forms the locking driving surface. The separation unlocking member is provided with a second driving groove. The groove wall of the second driving groove forms the unlocking driving surface. The second protrusion is inserted into the second driving groove so that the locking driving surface can abut against the unlocking driving surface.

According to one embodiment, the separation release members include two, and the two separation release members are symmetrically distributed relative to the rotation axis of the connecting seat; the first separation locking members are correspondingly arranged in two, and the two first separation locking members are symmetrically distributed relative to the rotation axis of the connecting seat.

According to one embodiment, the separation release members include two. The two separation release members are symmetrically arranged relative to the rotation axis of the connecting seat. The second separation locking members are correspondingly arranged in two or geometric multiples of two. Every two of the second separation locking members are symmetrically arranged relative to the rotation axis of the connecting seat, and each of the second separation locking members is arranged at an angle to the adjacent separation locking member.

According to one embodiment, each of the second separation locking members is at a right angle to the adjacent separation releasing member.

According to one embodiment, the second separation locking member includes two, the two second separation locking members are symmetrically distributed with respect to the rotation axis of the connecting seat, and the locking driving surface of each second separation locking member includes a first locking driving surface and a second locking driving surface. The separation release member includes a first separation release member and a second separation release member. The first separation release member and the second separation release member are symmetrically distributed with respect to the rotation axis of the connecting seat. The release driving surface includes a first release driving surface and a second release driving surface. The first separation release member is provided with two first release driving surfaces. Each of the first unlocking driving surfaces abuts against the first locking driving surface of the corresponding second separation locking member. The second separation unlocking member is provided with two second unlocking driving surfaces, so that each of the second unlocking driving surfaces abuts against the second locking driving surface of the corresponding second separation locking member.

According to one embodiment, the connecting seat includes a first shell and a second shell, the second shell is connected to the seat frame, the first shell has a first groove for accommodating the movable seat, the first shell and the second shell are combined to form a accommodating cavity, the connecting seat also has a first opening, the first groove is connected to the accommodating cavity through the first opening, the separation locking piece is at least partially accommodated in the accommodating cavity, and the hook portion of the separation locking piece can pass through the first opening and extend into the first groove to engage with the slot.

According to one embodiment, the separation release member includes a separation operating portion and a separation driving portion, the connecting seat has a receiving cavity and a second opening penetrating the side wall of the receiving cavity, the separation driving portion is in the receiving cavity and drivingly connected to the separation locking member, and the separation operating portion extends out of the receiving cavity through the second opening.

According to one embodiment, one of the movable seat and the connecting seat is provided with a first plugging hole, and the other of the movable seat and the connecting seat is provided with a connecting shaft, and the connecting shaft can be inserted into the first plugging hole.

According to one embodiment, the second locking mechanism further includes a separation reset member, which is arranged between the separation lock member and the connecting seat, and the separation reset member is suitable for biasing the separation lock member so that the separation lock member moves toward the separation locking position.

According to one embodiment, the movable seat includes a truncated cone portion and a disc-shaped portion disposed at an end surface of the truncated cone portion, and the clamping groove is formed between the disc-shaped portion and the truncated cone portion.

According to one embodiment, the separation locking member further includes a wedge-shaped surface, which is arranged on the hook body portion, and the wedge-shaped surface is suitable for being pushed by the movable seat to drive the separation locking member to move.

A stroller comprises: a seat assembly; a frame; and the seat locking device as described above. The seat assembly is connected to the frame through the seat locking device.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the attached drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the present invention and do not limit the scope of protection of the present invention.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more related listed items.

As shown in Fig. 1 to Fig. 3, an embodiment of the present invention provides a child carrier, which is convenient to fold. Specifically, the child carrier includes a frame 1, a seat locking device 3 and a seat assembly 2. The frame 1 includes a first wheel frame 100, a second wheel frame 200, a push rod frame 400 and a folding mechanism 500. The first wheel frame 100, the second wheel frame 200 and the push rod frame 400 are pivotally connected to each other, so that the first wheel frame 100 and the second wheel frame 200 are arranged at an angle to form a stable triangular support structure relative to the ground. The push rod frame 400 is located above the first wheel frame 100 and the second wheel frame 200 for easy pushing. The folding mechanism 500 is disposed between the first wheel frame 100 , the second wheel frame 200 and the push rod frame 400 , and is used to realize the rotation and folding of the first wheel frame 100 , the second wheel frame 200 and the push rod frame 400 .

Specifically, as shown in FIG4 , the first wheel frame 100 includes two first supporting assemblies 110 spaced apart along the left-right direction of the frame 1, one end of the two first supporting assemblies 110 is relatively close to each other and pivotally connected to the push rod frame 400, and the other end of the two first supporting assemblies 110 is relatively far away and respectively connected to the two wheel assemblies 800. At least one first connecting rod 120 is also connected between the two first supporting assemblies 110. Please refer to FIG6 and FIG7 together, each first supporting assembly 110 includes a first supporting rod 111 and a first rotating seat 112 connected to the first supporting rod 111. In this embodiment, the first rotating seat 112 includes a first pivot portion 1121 that is roughly disc-shaped and a first connecting portion 1122 that is fixedly connected to the first pivot portion 1121. In this embodiment, the first connecting portion 1122 is formed in a sleeve shape to be sleeved on an end of the first supporting rod 111 that is away from the wheel assembly 800. In other embodiments, the first connecting portion 1122 can also be connected to the first supporting rod 111 by welding, welding or riveting, or the first connecting portion 1122 (or the second rotating seat 212 described later) and the first supporting rod 111 can be an integrally formed structure.

Specifically, as shown in FIGS. 4 to 6 , the structure of the second wheel frame 200 is similar to that of the first wheel frame 100, and also includes two second support assemblies 210 spaced apart along the left-right direction of the frame 1, one end of the two second support assemblies 210 is relatively close to each other and pivotally connected to the push rod frame 400, and the other end of the two second support assemblies 210 is relatively far away and respectively connected to the two wheel assemblies 800. At least one second connecting rod 220 is also connected between the two second support assemblies 210. In this way, the first wheel frame 100 and the second wheel frame 200 also form a stable triangular support structure, thereby further improving the overall stability of the frame 1. Each second supporting assembly 210 includes a second supporting rod 211 and a second rotating seat 212 connected to the second supporting rod 211. The second rotating seat 212 is roughly disc-shaped. The second rotating seat 212 is connected to one end of the second supporting rod 211 that is remote from the wheel assembly 800. In this embodiment, the middle part of the second rotating seat 212 forms a sleeve shape to be sleeved on one end of the second supporting rod 211 that is remote from the wheel assembly 800. In other embodiments, the second rotating seat 212 can also be connected to the second supporting rod 211 by welding, welding or riveting, or the second rotating seat 212 and the second supporting rod 211 can be an integrally formed structure.

Specifically, as shown in FIG4 , the push rod frame 400 includes a push rod assembly 410 and a grip assembly 420. The push rod assembly 410 and the grip assembly 420 are connected to each other and are arranged in a substantially T-shape. One end of the push rod assembly 410 away from the grip assembly 420 is pivotally connected to the first wheel frame 100 and the second wheel frame 200, and the grip assembly 420 is used for the user to hold it to push the child carrier to move.

Further, as shown in FIG8 , the push rod assembly 410 includes a first push rod 411, a second push rod 412 and a pivot seat 413. The first push rod 411 and the second push rod 412 are slidably connected. In this embodiment, the first push rod 411 is at least partially inserted into the second push rod 412. The length of the push rod assembly 410 can be adjusted by a push rod length adjustment mechanism 610. The push rod length adjustment mechanism 610 has a locked state and a released state. When the push rod length adjustment mechanism 610 is in the released state, the first push rod 411 can move along the extension direction of the second push rod 412 to extend or shorten the push rod assembly, and when the push rod length adjustment mechanism 610 is in the locked state, the first push rod 411 and the second push rod 412 are relatively fixed.

Specifically, the push rod length adjustment mechanism 610 can be in various forms. For example, as shown in FIGS. 8 to 10 , the push rod length adjustment mechanism 610 can include a plurality of second locking holes 611 disposed on one of the first push rod 411 and the second push rod 412, a second locking pin 612 disposed on the other of the first push rod 411 and the second push rod 412, a length adjustment operating member 613, a linking member 614, and a fourth reset member 615.

In this embodiment, as shown in FIGS. 8 to 10 , a plurality of second locking holes 611 are provided on the second push rod 412. The second locking pin 612 is movably provided at a position of the first push rod 411 away from the grip assembly 420. The second locking pin 612 is movable between a fifth position and a sixth position. When the second locking pin 612 is located at the fifth position, it can be inserted and matched with one of the second locking holes 611, and when the second locking pin 612 is located at the sixth position, it is released from the second locking hole 611. The length adjustment operating member 613 is provided on the first push rod 411 and is connected to the second locking pin 612 via a linking member 614. The length adjustment operating member 613 can be operated to drive the second locking pin 612 to switch between the fifth position and the sixth position.

Specifically, as shown in Figures 8 to 10, one of the connecting member 614 and the length adjustment operating member 613 can be provided with a first driving groove (not shown), and the other of the connecting member 614 and the length adjustment operating member 613 can be provided with a first driving pin (not shown). The extension direction of the first driving groove is staggered and not perpendicular to the moving direction of the length adjustment operating member 613, the first driving pin is plugged into the first driving groove and can move along the first driving groove, one of the connecting member 614 and the second locking pin 612 is provided with a second driving groove (not shown), and the other of the connecting member 614 and the second locking pin 612 is provided with a second driving pin 617b, the extension direction of the second driving groove is staggered and not perpendicular to the moving direction of the length adjustment operating member 613, the second driving pin 617b is plugged into the second driving groove and can move along the second driving groove, and the first driving groove and the second driving groove are arranged at intervals.

Furthermore, as shown in Figures 8 to 10, the first push rod 411 can be provided with a accommodating chamber 411a extending parallel to its extension direction, and the push rod assembly 410 also includes a guide seat 414, which is arranged in the accommodating chamber 411a, and the guide seat 414 is provided with a first groove 414a, a second groove (not shown) and a bar hole (not shown) passing through the first groove 414a and the second groove, and the extension directions of the first groove 414a and the bar hole are respectively staggered with the extension direction of the second groove, and the second locking pin 612 can be movably inserted in the first groove 414a, and the second driving pin 617b passes through the bar hole to connect the second locking pin 612 with the connecting member 614. Two ends of the fourth reset member 615 are respectively against the linking member 614 and the guide seat 414 , and the fourth reset member 615 constantly moves the linking member 614 in the direction of driving the second locking pin 612 to move to the fifth position.

The length adjustment process of the push rod assembly 410 in this embodiment is described in detail below: when the length of the push rod assembly 410 needs to be adjusted, as shown in FIG. 10 , the length adjustment operating member 613 is pressed in the direction of T1, and at the same time, the length adjustment operating member 613 moves in the direction of T2 through the matching drive linking member 614 of the first drive groove and the first drive pin, and the fourth reset member 615 is compressed. As shown in FIG9 , the connecting member 614 then drives the second locking pin 612 to move in the direction of T1 through the cooperation of the second driving groove and the second driving pin 617b. When the second locking pin 612 moves to disengage from a second locking hole 611, the push rod length adjustment mechanism 610 is released, and the first push rod 411 can move relative to the second push rod 412. At this time, the overall length of the push rod assembly 410 can be adjusted by moving the first push rod 411 relative to the second push rod 412.

When the first push rod 411 moves to the position opposite to the other second locking hole 611 as required, the pressing force on the length adjustment operating member 613 can be cancelled, and the linking member 614 moves in the opposite direction of T2 under the elastic force of the fourth reset member 615. At the same time, the linking member 614 moves the second locking pin 612 in the opposite direction of T1 through the cooperation of the second driving groove and the second driving pin 617b to be re-inserted into the other second locking hole 611, so that the first push rod 411 and the second push rod 412 are re-locked. At the same time, the linking member 614 also drives the length adjustment operating member 613 to move in the opposite direction of T1 and reset through the cooperation of the first driving groove and the first driving pin.

Specifically, as shown in FIGS. 11 to 13 , the grip assembly 420 includes a connecting sleeve 421, a grip body 422, a grip 423 and a closing cover 424. The connecting sleeve 421 is generally a T-shaped sleeve, including a first sleeve portion 4211 and a second sleeve portion 4212 that are interconnected. The first sleeve portion 4211 is sleeved on one end of the first push rod 411 of the push rod assembly 410. The grip body 422 is a hollow rod structure. The second sleeve portion 4212 is sleeved on the approximate middle of the grip body 422, and the second sleeve portion 4212 and the grip body 422 are fixedly connected by a fastener 710. There are two grips 423 that are sleeved on the grip body 422 at intervals, and both grips 423 are rotatable relative to the grip body 422. In this embodiment, the two handles 423 are respectively located at two sides of the second sleeve portion 4212. The two closing covers 424 are respectively covered and fixed at two ends of the handle body 422 and are respectively located at one side of the two handles 423 away from the second sleeve portion 4212.

Furthermore, as shown in FIGS. 6 and 7 , the pivot seat 413 includes a second pivot portion 4131 that is substantially disc-shaped and a second connecting portion 4132 that is fixedly connected to the second pivot portion 4131. The second connecting portion 4132 of the pivot seat 413 is connected to the second push rod 412 of the push rod assembly 410. In this embodiment, the second connecting portion 4132 is formed in a sleeve shape to be sleeved on an end of the second push rod 412 that is far from the grip assembly 420. In other embodiments, the second connecting portion 4132 may also be connected to the second push rod 412 by means of fusion, welding, or riveting, or the second connecting portion 4132 or the pivot seat 413 and the second push rod 412 may be an integrally formed structure.

6 and 14 , the first pivoting parts 1121 of the two first rotating seats 112, the two second rotating seats 212 and the second pivoting part 4131 of the pivoting seat 413 are pivoted via the rotating shaft 510. Specifically, the two first rotating seats 112 are arranged on the left and right sides of the pivoting seat 413, and the two second rotating seats 212 are respectively arranged on the sides of the two first rotating seats 112 away from the pivoting seat 413. In this embodiment, the two first rotating seats 112 are respectively engaged with the two sides of the pivot seat 413 and abut against the two side surfaces of the pivot seat 413, and the two second rotating seats 212 are respectively engaged with the sides of the two first rotating seats 112 away from the pivot seat 413 and abut against the sides of the two first rotating seats 112 away from the pivot seat 413, so that the shaking of the frame 1 during the rotation of the first rotating seats 112, the second rotating seats 212 and the pivot seat 413 can be reduced.

Specifically, as shown in FIGS. 14 to 16 , the folding mechanism 500 includes a rotating shaft 510 , a release assembly 520 , and a linkage assembly 530 .

Specifically, as shown in FIGS. 14 to 16 , the release assembly 520 includes a locking member 521, a driving member 522, a pulling member 523 and a first reset member 524. The locking member 521 is generally a columnar structure. In this embodiment, the second connecting portion 4132 of the pivot seat 413 has a first accommodating cavity 4133, and the locking member 521 is movably disposed in the first accommodating cavity 4133. Both second rotating seats 212 are provided with a locking recess 1125 that can communicate with the first accommodating cavity 4133. As shown in FIGS. 6 and 7 , the locking recesses 1125 of the two second rotating seats 212 are both disposed on their outer peripheries, and the openings are both facing the first accommodating cavity 4133 of the second connecting portion 4132. The release assembly 520 has a locked state and a released state. When the release assembly 520 is in the locked state, the locking member 521 is located at a relatively low position of the first accommodating cavity 4133, and is inserted into the two locking recesses 1125 at the same time so that the hinge seat 413 and the two first rotating seats 112 are relatively fixed. When the release assembly 520 is in the released state, the locking member 521 is located at a relatively high position of the first accommodating cavity 4133, so as to be separated from the two locking recesses 1125 so that the hinge seat 413 can rotate relative to the two first rotating seats 112.

Furthermore, as shown in FIG. 12 and FIG. 13 , there are two driving members 522 and they are rotatably arranged on the grip body 422. Specifically, both ends of the second sleeve portion 4212 have an insertion opening 4212a, and the two driving members 522 are both cylindrical and sleeved on the grip body 422 at intervals, and at the same time, they are at least partially inserted into the two insertion openings 4212a, and the two driving members 522 can rotate relative to the second sleeve portion 4212. A contact boss 4212b is provided at the approximate middle of the inner wall of the second sleeve portion 4212, and the two sides of the contact boss 4212b are respectively abutted against the two driving members 522 inserted into the insertion opening 4212a. The two driving members 522 are respectively connected to the grip 423 on the corresponding sides. In this embodiment, each driving member 522 is provided with a connecting groove 5221, and one end of each handle 423 close to the second sleeve portion 4212 is provided with a connecting protrusion 4231 that can be inserted into the corresponding connecting groove 5221. Of course, in other embodiments, the driving member 522 and the handle 423 can also be connected in other ways.

In this embodiment, as shown in FIG. 15 and FIG. 16 , the pulling member 523 is a steel wire rope. Of course, in other embodiments, the pulling member 523 may also be other linear objects with certain rigidity. There are two pulling members 523, and both ends of each pulling member 523 are respectively connected to the locking member 521 and one of the driving members 522. In this way, when one of the handles 423 is rotated to drive the driving member 522 to rotate, the driving member 522 will drive the locking member 521 to move away from the locking recess 1125 through the pulling member 523, thereby switching the release assembly 520 from the locked state to the released state.

Further, as shown in FIG. 14 and FIG. 15 , the two ends of the first reset member 524 abut against the locking member 521 and the pivot seat 413, respectively, and the first reset member 524 is suitable for biasing the locking member 521 so that the locking member 521 moves in the direction of being inserted into the locking recess 1125. Specifically, a pin (not shown) is provided in the pivot seat 413, and the pin penetrates the pivot seat 413 and the second push rod 412 to fix the pivot seat 413 on the second push rod 412. A reset cavity 5211 is provided inside the locking member 521, and the reset cavity 5211 has an abutting cavity wall 5212, and a first set column 5213 is provided on the abutting cavity wall 5212, and the pin can extend into the reset cavity 5211. The first reset member 524 is disposed in the reset cavity 5211. The first reset member 524 is sleeved outside the first sleeve column 5213, and the two ends of the first reset member 524 are respectively abutted against the abutment cavity wall 5212 and the pin. In this way, the first reset member 524 can be prevented from shifting during the biasing process. In this embodiment, the pin is located on the side of the abutment cavity wall 5212 close to the handle assembly 420, that is, the pin is located above the abutment cavity wall 5212. Thus, when one of the handles 423 is rotated to drive the driving member 522 to rotate, the driving member 522 will drive the locking member 521 to move away from the locking recess 1125 through the lead member 523, and the first reset member 524 will be compressed and deformed. When the rotational external force applied to the handle 423 is removed, the locking member 521 will move toward the locking recess 1125 under the elastic force of the first reset member 524, thereby switching the release assembly 520 from the release state to the lock state. In this embodiment, the first reset member 524 is a spring.

Specifically, as shown in FIGS. 12 and 13 , the release assembly 520 further includes a safety release member 525, a limit member 526, and a second reset member 527 to prevent the handle 423 from being accidentally rotated and causing the release assembly 520 to be accidentally released.

Further, as shown in FIGS. 12 and 13 , the safety release 525 and the limiter 526 are movably disposed in the second sleeve portion 4212. The safety release 525 is movable between a first position and a second position. When the safety release 525 is in the first position, the limiter 526 limits the movement of the driving member 522. When the safety release 525 is in the second position, the limiter 526 releases the restriction on the movement of the driving member 522. The safety release 525 can be operated to move from the first position to the second position. Specifically, the safety release 525 includes a moving portion 5251 and an operating portion 5252 connected to each other, and the moving portion 5251 is disposed between the outer wall of the grip body 422 and the inner wall of the second sleeve portion 4212. The second sleeve portion 4212 is provided with a strip-shaped operating hole 4212c provided along the extending direction of the grip body 422, and the operating portion 5252 extends out of the second sleeve portion 4212 through the operating hole 4212c so as to be operated, that is, the operating portion 5252 can be operated to move along the operating hole 4212c.

Further, as shown in FIG. 12 and FIG. 13 , there are two stoppers 526 and both are roughly block-shaped structures. The abutting boss 4212b is provided with a first mounting recess 4212d, and the two driving members 522 are provided with a second mounting recess 5222 near the abutting boss 4212b. The two second mounting recesses 5222 are opposite to and communicate with the first mounting recess 4212d to form a mounting cavity for accommodating the stopper 526. The operating hole 4212c is communicated with the mounting cavity. The two stoppers 526 can be movably arranged in the mounting cavity and are respectively located on both sides of the safety release member 525. Taking one of the limiting members 526 as an example, when the limiting member 526 moves to a position where part of it is located in the first mounting recess 4212d and the other part is located in the second mounting recess 5222, the limiting member 526 will abut against the abutting boss 4212b, so that the driving member 522 cannot be rotated. When the limiting member 526 moves completely into the second mounting recess 5222, the limiting member 526 will not abut against the abutting boss 4212b, so that the driving member 522 can be rotated. There are two second reset members 527. The two second reset members 527 are both disposed in the mounting cavity and are respectively located on one side of the two limiting members 526 away from the safety release member 525. The two ends of each second reset member 527 are respectively against the driving member 522 and the limiting member 526 on the corresponding side, and the second reset member 527 is suitable for biasing the limiting member 526 on the corresponding side so that the limiting member 526 on the corresponding side moves in the direction of limiting the movement of the driving member 522 on the corresponding side. The setting method is specifically described by taking one of the second reset members 527 as an example. A second set column 5261 is provided on one side of the limiting member 526 away from the safety release member 525, and the second reset member 527 is sleeved outside the second set column 5261, and the two ends of the second reset member 527 are respectively against the limiting member 526 and the bottom wall of the second mounting recess 5222. In this way, the second reset member 527 can be prevented from shifting during the biasing process. In this embodiment, the second reset member 527 is a spring.

The following is a detailed description of the working principle of preventing accidental release using the structure of one side of the safety release member 525: When the safety release member 525 is in the first position, as shown in FIG12 , the limiting member 526 is partially located in the first mounting recess 4212d and partially located in the second mounting recess 5222 under the elastic force of the second reset member 527. Thus, when the handle 423 is rotated, the limiting member 526 abuts against the abutting boss 4212b, so that the driving member 522 cannot be rotated, and thus the locking member 521 cannot be disengaged from the locking recess 1125 through the pulling member 523 to realize the release of the release assembly 520. Thus, the handle 423 can be prevented from being accidentally rotated to cause the release assembly 520 to be accidentally released. When the bicycle frame 1 needs to be folded, as shown in FIG. 12 , the operating portion 5252 of the safety release member 525 can be pushed in the F1 direction or the opposite direction of F1, so that the moving portion 5251 of the safety release member 525 pushes one of the limiting members 526 until the limiting member 526 is completely located in the corresponding second mounting recess 5222, and the second reset member 527 is compressed. At this time, since the limiting member 526 no longer abuts against the abutting boss 4212b, the rotating handle 423 can drive the driving member 522 to rotate, so that the locking member 521 is disengaged from the locking recess 1125 through the pulling member 523 to realize the release of the release assembly 520.

Furthermore, as shown in FIG. 5 , the folding mechanism 500 includes two linkage assemblies 530 , and each first supporting assembly 110 and each second supporting assembly 210 are movably connected to the push rod assembly 410 via one of the linkage assemblies 530 , and each first supporting assembly 110 and each second supporting assembly 210 can be folded by rotating relative to the push rod assembly 410 via the corresponding linkage assembly 530 .

The following is a detailed description of the structure of one of the linkage components 530, taking it as an example: the linkage component 530 can be in various forms. For example, in the first embodiment, as shown in FIGS. 5 to 7 , the linkage component 530 can include a first link 531, a second link 532, and a third link 533. One end of the first link 531 is pivoted to one side of the pivot seat 413. One end of the second link 532 is pivoted to the other end of the first link 531, and the other end of the second link 532 is pivoted to the first connecting portion 1122 of the first rotating seat 112 on the same side. One end of the third link 533 is pivoted to the other end of the first link 531, and the other end of the third link 533 is pivoted to the second supporting rod 211 on the same side. Of course, in other embodiments, one end of the first link 531 may also be pivoted with the second push rod 412, or the other end of the second link 532 may also be pivoted with the first support rod 111 on the same side, or the other end of the third link 533 may also be pivoted with the second rotating seat 212 on the same side. In this embodiment, the other end of the first link 531, one end of the second link 532 and one end of the third link 533 are pivoted to the drive shaft 534. The drive shaft 534 is located at the rear side of the pivot seat 413 to avoid interference with the seat assembly 2 during the folding process, and at the same time, it can also make the frame 1 foldable only when the push rod frame 400 is rotated along the F2 direction, which plays a certain role in limiting protection.

The working principle of the linkage assembly 530 in this embodiment is described in detail below: when the frame 1 needs to be folded, as shown in FIG. 1 and FIG. 2 , the release assembly 520 can be released first, and then the push rod frame 400 can be rotated in the F2 direction, that is, the push rod frame 400 is pulled against the second wheel frame 200. At the same time, during the rotation process, the push rod frame 400 drives the first wheel frame 100 to rotate in the opposite direction of F2 through the first link 531 and the second link 532 that are pivotally connected to each other, and drives the second wheel frame 200 to rotate in the opposite direction of F2 through the first link 531 and the third link 533 that are pivotally connected to each other, that is, the first wheel frame 100 and the second wheel frame 200 are pulled against the push rod frame 400. In this way, the push rod frame 400, the first wheel frame 100 and the second wheel frame 200 are all rotated and mutually leaned against to realize the overall folding of the frame 1, as shown in FIG. 3 .

When the vehicle frame 1 needs to be unfolded, as shown in FIG3 , the push rod frame 400 is rotated in the opposite direction of F2, so that the push rod frame 400 rotates away from the first wheel frame 100 and the second wheel frame 200. At the same time, the push rod frame 400 drives the first wheel frame 100 to rotate in the F2 direction through the first connecting rod 531 and the second connecting rod 532 pivoted to each other, and drives the second wheel frame 200 to rotate in the F2 direction through the first connecting rod 531 and the third connecting rod 533 pivoted to each other, that is, the first wheel frame 100 and the second wheel frame 200 rotate and unfold in the direction away from the push rod frame 400. When the push rod frame 400, the first wheel frame 100, and the second wheel frame 200 are rotated into place, the locking member 521 is inserted into the locking recess 1125 under the elastic force of the first reset member 524, thereby locking the frame 1 in the unfolded state, as shown in Figures 1 and 2.

In this embodiment, the linkage assembly 530 composed of the first link 531, the second link 532 and the third link 533 is disposed on both sides of the pivot seat 413, so that the push rod frame 400 can synchronously and smoothly drive the left and right sides of the first wheel frame 100 and the second wheel frame 200 to rotate and fold during the rotation process. Of course, in other embodiments, the folding mechanism 500 can also include only one linkage assembly 530, and the first link 531, the second link 532 and the third link 533 of the linkage assembly 530 are all located on the same side of the pivot seat 413, that is, the push rod frame 400 can drive the first wheel frame 100 and the second wheel frame 200 to rotate and fold together through only one linkage assembly 530.

In the second embodiment, as shown in FIG. 25 and FIG. 26 , the linkage assembly 530 may also include a center gear 535, a rotating disk 536, a planetary gear 537 and a drive shaft 534. The center gear 535 is fixed to one side of the second pivot portion 4131 of the pivot seat 413. The rotating disk 536 is fixed to one side of one of the first rotating seats 112 facing the pivot seat 413. The planetary gear 537 is disposed between the corresponding first rotating seat 112 and the pivot seat 413. As shown in FIG. 27 , the driving shaft 534 is eccentrically arranged with respect to the rotating shaft 510 , and the driving shaft 534 passes through the second rotating seat 212 , the planetary gear 537 and the pivot seat 413 , and the second rotating seat 212 is pivotally connected with the pivot seat 413 through the driving shaft 534 .

The specific structure of one of the linkage components 530 in this embodiment is described in detail below: Specifically, as shown in FIG. 25 and FIG. 26 , a plurality of gears are circumferentially arranged on at least part of the outer circumference of the center gear 535. In this embodiment, a plurality of gears are arranged on one-third of the circumference of the center gear 535. Of course, in other embodiments, the circumferential range of the gears arranged on the center gear 535 can also be adjusted as needed. The center gear 535 is fixed to one side of the second pivot portion 4131 of the pivot seat 413 and is coaxially arranged with the second pivot portion 4131, and the rotating shaft 510 passes through the center of the center gear 535. The rotating disk 536 is roughly a one-third fan-shaped sheet structure, and the rotating disk 536 is provided with an arc-shaped first guide groove 5361. As shown in FIG29 , a groove wall on one side of the first guide groove 5361 has a toothed edge 5362, which is substantially parallel to the arc edge of the rotating disk 536, and the tooth tip of the toothed edge 5362 faces the center of the rotating disk 536. A plurality of gears are arranged on the entire circumference of the planetary gear 537. The planetary gear 537 is engaged with the toothed edge 5362 of the center gear 535 and the rotating disk 536. The toothed edge 5362 has a first end 5363 and a second end 5364, so as to limit the planetary gear 537 from moving between the first end 5363 and the second end 5364.

Specifically, as shown in Figures 25 and 26, a mounting boss 2122 is provided on one side of the second rotating seat 212 facing the first rotating seat 112, and the mounting boss 2122 is provided with a mounting groove 2123 extending along its length direction. The first rotating seat 112 is provided with a penetrating second guide groove 1123, and the mounting boss 2122 can pass through the second guide groove 1123 and move along the second guide groove 1123. One end of the drive shaft 534 is inserted and fixed in the mounting groove 2123, and the other end of the drive shaft 534 passes through the planetary gear 537 and the pivot seat 413 in sequence. The planetary gear 537 is fixedly connected to the drive shaft 534, and the drive shaft 534 can rotate relative to the pivot seat 413.

In this embodiment, the driving shafts 534 of the two linkage assemblies 530 are substantially the same shaft, so one end of the driving shaft 534 is inserted and fixed in the mounting groove 2123 of one of the second rotating seats 212, and the other end of the driving shaft 534 passes through one of the planetary gears 537, the pivot seat 413, and the other planetary gear 537 in sequence and is inserted and fixed in the mounting groove 2123 of the other second rotating seat 212. Both planetary gears 537 are fixedly connected to the driving shaft 534, and the driving shaft 534 can rotate relative to the pivot seat 413. In other embodiments, the driving shafts 534 of the two linkage assemblies 530 can also be different shafts.

The working principle of the linkage assembly 530 in this embodiment is described in detail below: when the frame 1 needs to be folded, as shown in Figures 18 and 19, the release assembly 520 can be released first, and then the push rod frame 400 can be rotated in the F3 direction, that is, the push rod frame 400 is pulled against the second wheel frame 200. As shown in Figure 29, the center gear 535 fixed on the hinge seat 413 also rotates in the F3 direction, and at the same time drives the planetary gear 537 engaged therewith to rotate in the opposite direction of F3. During the rotation of the planetary gear 537, the rotating plate 536 engaged therewith through the toothed edge 5362 is also driven to rotate in the opposite direction of F3, that is, the first wheel frame 100 is pulled against the push rod frame 400. During the rotation of the planetary gear 537, the second wheel frame 200 is also driven to rotate in the opposite direction of F3 through the drive shaft 534, that is, the second wheel frame 200 is close to the push rod frame 400. In this way, the push rod frame 400, the first wheel frame 100 and the second wheel frame 200 are all rotated and close to each other to achieve the overall folding of the frame 1. When the planetary gear 537 moves from the first end 5363 to the second end 5364 along the toothed edge 5362, the frame 1 is folded into place, as shown in FIG. 20.

When the vehicle frame 1 needs to be unfolded, the push rod frame 400 is rotated in the opposite direction of F3, so that the push rod frame 400 rotates away from the first wheel frame 100 and the second wheel frame 200. At the same time, as shown in Figure 29, the center gear 535 fixed on the hinge seat 413 also rotates in the opposite direction of F3, and at the same time drives the planetary gear 537 engaged with it to rotate in the F3 direction. During the rotation of the planetary gear 537, the turntable 536 engaged with it through the toothed edge 5362 is also driven to rotate in the F3 direction, that is, the first wheel frame 100 is unfolded in the direction away from the push rod frame 400. During the rotation of the planetary gear 537, the second wheel frame 200 is also driven to rotate in the F3 direction through the driving shaft 534, that is, the second wheel frame 200 is deployed in the direction away from the push rod frame 400. When the push rod frame 400, the first wheel frame 100, and the second wheel frame 200 are rotated to the right position, the locking member 521 is inserted into the locking recess 1125 under the elastic force of the first reset member 524, thereby locking the frame 1 in the deployed state, as shown in Figures 18 and 19.

25, 26 and 28, the front side of the pivot seat 413 in this embodiment is further provided with a first limiting protrusion 4135, and the first pivot portions 1121 of the two first rotating seats 112 are both provided with a second limiting protrusion 1124. The two second rotating seats 212 are both provided with a third limiting protrusion 2121. When the vehicle frame 1 is unfolded into place, the two second limiting protrusions 1124 and the two third limiting protrusions 2121 are all against the first limiting protrusion 4135, and the first limiting protrusion 4135 is located in the F3 direction of the two second limiting protrusions 1124 and the two third limiting protrusions 2121, that is, when the vehicle frame 1 is unfolded into place, the two second limiting protrusions 1124, the two third limiting protrusions 2121 and the first limiting protrusion 4135 are against each other to prevent the hinge seat 413 from driving the push rod frame 400 to continue to rotate in the opposite direction of the F3 direction, and at the same time, the vehicle frame 1 can only be folded when the push rod frame 400 is rotated in the F3 direction. In other embodiments, the second limiting protrusion 1124 capable of counteracting the first limiting protrusion 4135 may be provided only on the first pivot portion 1121 of one of the first rotating seats 112, and the third limiting protrusion 2121 capable of counteracting the first limiting protrusion 4135 may be provided only on one of the second rotating seats 212, which can also play the role of limiting protection.

In this embodiment, the linkage assembly 530 composed of a central gear 535, a rotating disk 536, a planetary gear 537 and a driving shaft 534 is disposed on both sides of the hinge seat 413, so that the push rod frame 400 can synchronously and smoothly drive the left and right sides of the first wheel frame 100 and the second wheel frame 200 to rotate and retract during the rotation process. Of course, in other embodiments, the folding mechanism 500 may also include only one linkage assembly 530, and the center gear 535, the turntable 536, the planetary gear 537 and the drive shaft 534 of the linkage assembly 530 are all located on the same side of the pivot seat 413, that is, the push rod frame 400 can drive the first wheel frame 100 and the second wheel frame 200 to rotate and fold together only through one linkage assembly 530.

Further, as shown in FIG. 1 and FIG. 8 , the seat locking device 3 may include a seat frame 31. The seat frame 31 is movably disposed on the push rod frame 400, specifically, the seat frame 31 is movably disposed on the second push rod 412 of the push rod frame 400. The seat assembly 2 is detachably disposed on the seat frame 31 to provide a seating space for a child. The position of the seat frame 31 on the second push rod 412 can be adjusted by a seat height adjustment mechanism 620. The seat height adjustment mechanism 620 can be switched between a locked state and a released state. When the seat height adjustment mechanism 620 is in the locked state, the seat frame 31 is fixed relative to the second push rod 412. When the seat height adjustment mechanism 620 is in the released state, the seat frame 31 can move relative to the second push rod 412.

Specifically, as shown in FIG8 and FIG17, the seat frame 31 may include a supporting portion 311 and a mounting portion 315 connected to each other. The supporting portion 311 is used to be detachably connected to the seat assembly 2, and the mounting portion 315 is used to be movably connected to the second push rod 412. For example, the mounting portion 315 may be formed in a sleeve shape to be sleeved outside the second push rod 412 and movable along the second push rod 412. The seat height adjustment mechanism 620 may include a plurality of first locking holes 621 provided on the second push rod 412, a first locking pin 622 movably provided on the mounting portion 315, a height adjustment operating member 623, and a third reset member 624.

In this embodiment, as shown in FIG8 and FIG17, a plurality of first locking holes 621 and a plurality of second locking holes 611 are respectively located on opposite sides of the second push rod 412 to prevent the first locking pin 622 and the second locking pin 612 from interfering with each other. The first locking pin 622 is movable between a third position and a fourth position. When the first locking pin 622 is located at the third position, it can be inserted and matched with one of the first locking holes 621, and when the first locking pin 622 is located at the fourth position, it is released from the first locking hole 621.

Specifically, as shown in FIG. 17 , the mounting portion 315 is provided with a receiving groove 3151 whose opening faces away from the second push rod 412. The height adjustment operating member 623 is disposed in the receiving groove 3151. The two ends of the height adjustment operating member 623 are respectively an operating end 6231 and a pivot end 6232. At least the operating end 6231 of the height adjustment operating member 623 is exposed from the notch of the receiving groove 3151 for operation. The bottom of the receiving groove 3151 is provided with a through hole 3152 that communicates with the inner cavity of the mounting portion 315. One end of the first locking pin 622 is pivoted with the pivot end 6232 of the height adjustment operating member 623, and the other end of the first locking pin 622 can pass through the through hole 3152 and be inserted into any first locking hole 621 on the second push rod 412, so that the seat height adjustment mechanism 620 is in a locked state, and the seat frame 31 is fixed at a certain height position relative to the second push rod 412. The approximate middle part of the height adjustment operating member 623 is pivoted with the groove wall of the accommodating groove 3151 through the pivot member 720. The two ends of the third reset member 624 are respectively against the height adjustment operating member 623 and the seat frame 31, and the third reset member 624 is suitable for biasing the height adjustment operating member 623 to move the first locking pin 622 to the third position. Specifically, the operating end 6231 of the height adjustment operating member 623 is provided with an abutting groove 6233 on a side facing the receiving groove 3151, and the bottom of the receiving groove 3151 is provided with a mounting post 3153 opposite to the abutting groove 6233. One end of the third reset member 624 is inserted into the abutting groove 6233 and abuts against the bottom of the abutting groove 6233, and the other end of the third reset member 624 is sleeved outside the mounting post 3153 and abuts against the bottom of the receiving groove 3151. Such a setting is conducive to preventing the third reset member 624 from shifting during the deformation process. In this embodiment, the operating end 6231 and the pivot end 6232 of the height adjustment operating member 623 are respectively located on both sides of the pivot end 720, and the operating end 6231 is located on the side of the pivot end 6232 close to the handle 423, that is, along the height direction of the second push rod 412, and the third reset member 624 is arranged on the relatively upper side of the first locking pin 622.

The working principle of the seat height adjustment mechanism 620 is as follows: when the height of the seat assembly 2 needs to be adjusted through the seat height adjustment mechanism 620, as shown in FIG. 17, the height adjustment operating member 623 can be pressed in the F4 direction, the third reset member 624 is compressed and deformed, the height adjustment operating member 623 pivots in the F5 direction, and at the same time drives the first locking pin 622 pivoted therewith to move in the opposite direction of F4. When the first locking pin 622 moves to the fourth position and disengages from the first locking hole 621 previously inserted, the seat height adjustment mechanism 620 switches from the locked state to the unlocked state, and the seat frame 31 can move relative to the second push rod 412 to change the height of the seat assembly 2. When the seat frame 31 moves to a desired height relative to the second push rod 412, the pressing force applied to the height adjustment operating member 623 is removed, and the height adjustment operating member 623 moves in the opposite direction of F5 under the elastic force of the second reset member 527, and simultaneously drives the first locking pin 622 pivoted therewith to move in the direction of F4. When the first locking pin 622 moves to the third position and is inserted into the other first locking hole 621, the seat height adjustment mechanism 620 switches from the unlocked state to the locked state, and the seat frame 31 is fixed at a desired height relative to the second push rod 412, that is, the seat assembly 2 is adjusted to a desired height.

In addition, the seat locking device 3 according to the present invention can realize the rotation of the seat assembly 2 relative to the frame, for example, realize the 360-degree rotation reversal of the seat assembly 2 relative to the frame, and the seat locking device 3 can realize the rapid removal of the seat assembly 2 from the frame 1. The seat locking device 3 is detachably connected to the push rod frame 400.

As shown in Fig. 4 and Fig. 30, the seat locking device 3 may further include a connecting seat 32, a movable seat 33 and a first locking mechanism 34. The connecting seat 32 is disposed on the seat assembly 2, and the connecting seat 32 is movably connected to the seat frame 31 through the movable seat 33. As shown in Fig. 30 and Fig. 31, the connecting seat 32 has a first moving position and a second moving position. When the connecting seat 32 is located at the first moving position, the connecting seat 32 cannot rotate relative to the seat frame 31. When the connecting seat 32 is located at the second moving position, the connecting seat 32 can rotate relative to the seat frame 31. The first locking mechanism 34 can be switched between a release state and a lock state, so that the connecting seat 32 can rotate relative to the seat frame 31 or the connecting seat 32 can be fixed at a desired angle relative to the seat frame 31, thereby realizing the reversal and positioning of the seat assembly 2. Specifically, when the first locking mechanism 34 is in the release state, the movable seat 33 can drive the connecting seat 32 to move relative to the seat frame 31, so that the connecting seat 32 moves between a first moving position and a second moving position relative to the seat frame 31. When the connecting seat 32 moves to the second moving position, the connecting seat 32 can rotate relative to the seat frame 31, and the rotation axis is R, thereby realizing the reversal of the seat assembly 2. When the first locking mechanism 34 is in the locked state, the movable seat 33 cannot move relative to the seat frame 31, so that the connecting seat 32 cannot move relative to the seat frame 31. At this time, if the connecting seat 32 is in the first moving position, the connecting seat 32 cannot rotate relative to the seat frame 31, so that the connecting seat 32 is fixed relative to the seat frame 31, thereby fixing the seat assembly 2 at a desired angle.

In other embodiments not shown, the seat locking device 3 may not include the movable seat 33. The connecting seat 32 is directly connected to the seat frame 31, and the connecting seat 32 can be rotated relative to the seat frame 31 or fixed relative to the seat frame 31 through the first locking mechanism 34. Specifically, when the first locking mechanism 34 is in the unlocked state, the connecting seat 32 can be moved between the first moving position and the second moving position relative to the seat frame 31, and when the connecting seat 32 moves to the second moving position, the connecting seat 32 can be rotated relative to the seat frame 31, thereby realizing the reversal of the seat assembly 2. When the first locking mechanism 34 is in the locked state, the connecting seat 32 cannot move relative to the seat frame 31. At this time, if the connecting seat 32 is in the first moving position, the connecting seat 32 cannot rotate relative to the seat frame 31, so that the connecting seat 32 can be fixed relative to the seat frame 31, thereby fixing the seat assembly 2 at a desired angle.

As shown in FIG. 4 and FIG. 30 to FIG. 32, the seat frame 31 is movably connected to the push rod frame 400 of the frame 1. On the support portion 311 of the seat frame 31, the movable seat 33 and the connecting seat 32 are movably connected. The cross-section of the support portion 311 of the seat frame 31 is roughly circular. The support portion 311 is provided with a guide rail 312 and a third receiving groove 313. Among them, the third receiving groove 313 extends in the front-rear direction, and the extension line of the third receiving groove 313 intersects with the rotation axis R. It should be noted that the front and rear in this embodiment refer to the direction relative to the forward or backward direction of the stroller during pushing.

As shown in Figures 30 to 32 and 35, the guide rail 312 is suitable for the movable seat 33 and the connecting seat 32 to engage. A first guide groove 321 capable of engaging with the guide rail 312 is correspondingly provided on the side of the connecting seat 32 facing the seat frame 31. When the connecting seat 32 is located at the first moving position, the first guide groove 321 engages with the guide rail 312, so that the connecting seat 32 cannot rotate relative to the seat frame 31. When the connecting seat 32 is located at the second moving position, the first guide groove 321 disengages from the guide rail 312, so that the connecting seat 32 can rotate relative to the seat frame 31.

Further, as shown in FIG. 32 and FIG. 35 , the cross section of the guide rail 312 is generally T-shaped so as to restrict the movable seat 33 or the connecting seat 32 on the guide rail 312. The guide rail 312 is provided with a rotation notch 3121 for the connecting seat 32 to rotate and a switching notch 3122 for the first locking mechanism 34 to switch between a release state and a locking state. The guide rail 312 includes a first section 3123, a third section 3124 and a second section 3125 extending in the same direction, that is, the first section 3123, the third section 3124 and the second section 3125 are all located on the same straight line, the first section 3123 and the third section 3124 are arranged at intervals to form the rotation notch 3121, and the third section 3124 and the second section 3125 are arranged at intervals to form the switching notch 3122. The end of the second section 3125 far from the third section 3124 forms the outer end 3126 of the guide rail 312. As shown in FIG31 or FIG35, when the connecting seat 32 is located at the second moving position, the first guide groove 321 can be located at the rotation recess 3121 or at a side of the second section 3125 of the guide rail 312 far from the rotation recess 3121, that is, when the first guide groove 321 is located at the rotation recess 3121, the first guide groove 321 is released from the guide rail 312, so that the connecting seat 32 can rotate relative to the seat frame 31. The first section 3123 has a chamfer or rounded corner 3127 at one end facing the third section 3124, so that the first guide groove 321 and the guide rail 312 can automatically adjust their angles and engage with the guide rail 312 when there is a slight angular deviation, that is, the first guide groove 321 and the guide rail 312 can automatically align when there is a slight angular deviation. The outer end 3126 has a chamfer or rounded corner 3127 accordingly, so that the first guide groove 321 and the guide rail 312 can automatically align when there is a slight angular deviation.

As shown in FIG. 32 and FIG. 35 , the extension direction of the guide rail 312 is parallel to the extension direction of the third receiving groove 313, that is, the guide rail 312 extends in the front-rear direction. In this embodiment, the guide rail 312 includes two rails, and the two guide rails 312 are symmetrically distributed on both sides of the rotation axis R of the connecting seat 32, so that the movable seat 33 and the connecting seat 32 can move smoothly along the guide rail 312. In other embodiments not shown, the number of the guide rails 312 can also be one, three or even more, as long as the guide rail 312 can enable the connecting seat 32 to move between the first moving position and the second moving position relative to the seat frame 31, and the present invention is not limited to this.

In one embodiment, as shown in FIGS. 32 to 35 , the movable seat 33 includes a truncated cone portion 336 and a disc-shaped portion 335. The outer peripheral profile of the truncated cone portion 336 is conical or substantially conical. The disc-shaped portion 335 is connected to one end of the truncated cone portion 336 and a slot 331 is formed at the connection between the disc-shaped portion 335 and the truncated cone portion 336. The slot 331 is suitable for being engaged with the second locking mechanism 35 to detachably connect the connecting seat 32 to the movable seat 33. The specific structure of the second locking mechanism 35 is described below. The other end of the truncated cone portion 336 away from the disc-shaped portion 335 is provided with a second guide groove 332 that can be engaged with the guide rail 312 to guide the movable seat 33 to slide along the guide rail 312. The movable seat 33 has a receiving cavity 334, and at least a portion of the first locking mechanism 34 is received in the receiving cavity 334. The second guide groove 332 is connected to the receiving cavity 334, so that when the second guide groove 332 is engaged with the guide rail 312, a portion of the guide rail 312 is received in the receiving cavity 334, so that the first locking mechanism 34 can switch between the unlocking state and the locking state by mutual avoidance or mutual interference with the guide rail 312. When the first locking mechanism 34 is in a locked state, at least a portion of the first locking mechanism 34 abuts against the guide rail 312, so that the second guide groove 332 cannot move relative to the guide rail 312 in a direction parallel to the guide rail 312 (i.e., the first direction D1), thereby making it impossible for the first locking mechanism 34 and the movable seat 33 to move relative to the guide rail 312 (or the seat frame 31) in the first direction D1, and further making it impossible for the connecting seat 32 to move relative to the guide rail 312 (or the seat frame 31) in the first direction D1. When the first locking mechanism 34 is in the unlocked state, the first locking mechanism 34 does not interfere with the relative sliding between the second guide groove 332 and the guide rail 312, so that the first locking mechanism 34 and the movable seat 33 can move along the first direction D1 relative to the guide rail 312 (or the seat frame 31), thereby driving the connecting seat 32 to move between the first moving position and the second moving position along the first direction D1 relative to the seat frame 31, and when the connecting seat 32 moves to the second moving position, the connecting seat 32 can rotate relative to the seat frame 31 (as shown in Figures 35 and 36).

Further, as shown in FIG. 32 and FIG. 38 , the movable seat 33 is provided with a connecting shaft 333, and the connecting shaft 333 is suitable for connecting with the connecting seat 32 to provide a rotation axis R for the connecting seat 32 to rotate relative to the movable seat 33. The connecting seat 32 is correspondingly provided with a first plug hole 326, and the connecting shaft 333 is inserted into the first plug hole 326. The movable seat 33 is connected to the seat frame 31 through a movable column 36. As shown in FIG. 33 , one end of the movable column 36 is connected to the movable seat 33, and the other end of the movable column 36 is inserted into the third receiving groove 313 and can move in the third receiving groove 313. The movable column 36 is set away from the rotation axis R of the connecting seat 32. In this embodiment, the movable column 36 includes a screw, a bolt, etc. Optionally, one end of the movable post 36 can be threadedly connected to the movable seat 33.

In one embodiment, as shown in FIG. 32 and FIG. 38 , the seat locking device 3 may further include a movable reset member 37. The movable reset member 37 is connected to the movable column 36 and the seat frame 31 respectively, and the movable reset member 37 is suitable for biasing the movable column 36 to move the movable seat 33, thereby driving the connecting seat 32 to move to the first moving position. The movable reset member 37 includes a spring, and specifically, the movable reset member 37 includes a tension spring. One end of the movable reset member 37 is connected to the groove wall of the third accommodating groove 313, and the other end is connected to the movable column 36.

In one embodiment, as shown in FIGS. 32 to 34 , the first locking mechanism 34 includes a reversing release member 341, a reversing reset member 342, and a positioning pin 343. The reversing release member 341 is at least partially disposed in the accommodating chamber 334, and the reversing release member 341 is staggered with the guide rail 312. The reversing release member 341 can move along the second direction D2 relative to the movable seat 33 to switch between the reversing release position and the reversing lock position, that is, the first locking mechanism 34 can switch between the release state and the lock state. The second direction D2 is staggered with the extension direction of the guide rail 312, that is, the second direction D2 is staggered with the first direction D1, and is perpendicular to the rotation axis R of the connecting seat 32. In this embodiment, the second direction D2 is perpendicular to the first direction D1. The reversing release member 341 can also move relative to the seat frame 31 along the first direction D1, so that the movable seat 33 can move relative to the seat frame 31 and drive the connecting seat 32 to move between the first moving position and the second moving position.

In one embodiment, as shown in FIGS. 32 to 34 , the reversing release member 341 has a first recess 3411, which is located in the accommodating cavity 334 and can cooperate with the guide rail 312. The cross-sectional shape of the first recess 3411 is consistent with the cross-sectional shape of the guide rail 312, or the cross-sectional shape of the guide rail 312 can be completely located in the cross-sectional shape of the first recess 3411. For example, the cross-sectional shape of the guide rail 312 is T-shaped, and correspondingly, the cross-sectional shape of the first recess 3411 can be a T-shaped or rectangular recess, so that the guide rail 312 can pass through the first recess 3411 so that the reversing release member 341 can move relative to the guide rail 312 in the first direction D1.

As shown in Figures 30 to 32, when the connecting seat 32 is in the first moving position, the reversing release member 341 is inserted into the switching recess 3122 of the guide rail 312, and the reversing release member 341 moves relative to the guide rail 312 in a direction that is staggered with the extension direction of the guide rail 312. In this embodiment, the reversing release member 341 can move along the second direction D2 to switch between the reversing release position and the reversing lock position. When the reversing release member 341 is in the reversing release position, the first recess 3411 is aligned with the guide rail 312 (specifically the third section 3124 and the second section 3125) in the D1 direction (as shown in FIG. 34 ), and the guide rail 312 is aligned with the first recess 3411 of the reversing release member 341 so that the reversing release member 341 can move relative to the guide rail 312 in the first direction D1, thereby allowing the movable seat 33 and the connecting seat 32 to move relative to the seat frame 31 along the first direction D1. When the reversing release member 341 is located at the reversing locking position, the first recess 3411 and the guide rail 312 (specifically the third section 3124 and the second section 3125) are at least partially offset in the D1 direction (as shown in FIG. 33 ), and the two sides of the reversing release member 341 abut against the third section 3124 and the second section 3125, so that the reversing release member 341 cannot move relative to the guide rail 312 in the first direction D1, thereby making the movable seat 33 and the connecting seat 32 unable to move relative to the seat frame 31 along the first direction D1. When the connecting seat 32 is located at the second moving position, the reversing release member 341 is located at a side of the second section 3125 that is away from the rotating recess 3121. At this time, if the pushing force applied to the reversing release member 341 is maintained, the reversing release member 341 is maintained at the reversing release position. Alternatively, in other embodiments, a limiting component (not shown) may be provided in the third receiving groove 313 to limit the movable stroke of the movable column 36 moving forward, and when the movable column 36 moves to abut against the limiting component, the connecting seat 32 is located at the second moving position, and at this time, the first recess 3411 of the reversing release member 341 is located at a position far from the switching recess 3122 of the guide rail 312, that is, the first recess 3411 is engaged with the second section 3125 of the guide rail 312, so that even when the pushing force applied to the reversing release member 341 is removed, the reversing release member 341 is still in the reversing release position and cannot move from the reversing release position to the reversing locking position. Correspondingly, the first recess 3411 includes two, so that the two guide rails 312 can pass through them respectively.

According to other embodiments not shown in the figure, the guide rail 312 includes a first section 3123 and a second section 3125 extending in the same direction, that is, the first section 3123 and the second section 3125 are both located on the same straight line. The first section 3123 and the third section 3124 are arranged at intervals to form a rotating notch 3121 or a switching notch 3122. In this embodiment, the rotating notch 3121 and the switching notch 3122 are the same. When the connecting seat 32 is located at the first moving position, the reversing release member 341 is inserted into the switching recess 3122 of the guide rail 312, and the reversing release member 341 moves relative to the guide rail 312 in a direction intersecting with the extension direction of the guide rail 312. In this embodiment, the reversing release member 341 can move along the second direction D2 to switch between the reversing release position and the reversing lock position. When the reversing release member 341 is in the reversing release position, the first recess 3411 is aligned with the guide rail 312 (specifically the third section 3124 and the second section 3125) in the D1 direction (as shown in FIG. 34 ), and the guide rail 312 is aligned with the first recess 3411 of the reversing release member 341 so that the reversing release member 341 can move relative to the guide rail 312 in the first direction D1, thereby allowing the movable seat 33 and the connecting seat 32 to move relative to the seat frame 31 along the first direction D1. When the reversing release 341 is in the reversing locking position, the first recess 3411 and the guide rail 312 (specifically the third section 3124 and the second section 3125) are at least partially offset in the D1 direction (as shown in FIG. 33 ), and one side of the reversing release 341 abuts against the second section 3125, so that the reversing release 341 cannot move in the direction away from the first section 3123 relative to the guide rail 312 in the first direction D1, thereby preventing the movable seat 33 and the connecting seat 32 from moving in the first direction D1 relative to the seat frame 31. When the connecting seat 32 is located at the second moving position, the first guide groove 321 is located on the side of the second section 3125 of the guide rail 312 far away from the rotating recess 3121, or is located at the rotating recess 3121, so that the first guide groove 321 is disengaged from the guide rail 312, thereby allowing the connecting seat 32 to rotate relative to the seat frame 31.

As shown in FIGS. 32 to 34 , the reversing release member 341 is provided with a strip-shaped positioning groove 3412, and the extending direction of the positioning groove 3412 is parallel to the second direction D2. The positioning pin 343 is plugged into and matched with the positioning groove 3412, so that the reversing release member 341 can move along the second direction D2 relative to the positioning pin 343, and can move along the first direction D1 synchronously with the positioning pin 343. In this embodiment, one end of the positioning pin 343 is connected to the movable seat 33, and specifically, the positioning pin 343 is detachably connected to the disc-shaped portion 335 of the movable seat 33. In some other embodiments where the movable seat 33 is not provided, for example, the other end of the positioning pin 343 can be movably connected to the seat frame 31, so that the positioning pin 343 can be movable in the first direction D1 relative to the seat frame 31, but cannot be moved in the second direction D2, and the other end of the positioning pin 342 is plugged into the positioning groove 3412.

Furthermore, as shown in FIGS. 32 to 34 , the reversing release member 341 has a reversing operating portion 3413. The movable seat 33 is provided with a through hole 337 penetrating the cavity wall of the accommodating cavity 334. The reversing operating portion 3413 of the reversing release member 341 passes through the through hole 337 and extends out of the accommodating cavity 334 to facilitate the operation of the reversing release member 341. The reversing release member 341 also has a limiting portion 3414. A limiting protrusion 314 is correspondingly formed on a surface of the seat frame 31 facing the connecting seat 32. The limiting portion 3414 can abut against the limiting protrusion 314 to limit the movement stroke of the reversing release member 341 in the second direction D2.

As shown in FIGS. 32 to 34 , the reversing reset member 342 is accommodated in the accommodating chamber 334 , and the reversing reset member 342 is suitable for biasing the reversing release member 341 to move to the reversing locking position. The reversing reset member 342 includes elastic members such as springs and elastic sheets, and one end of the reversing reset member 342 abuts against the cavity wall of the accommodating chamber 334 , and the other end abuts against the reversing release member 341 .

In one example, as shown in FIG. 36 , FIG. 38 and FIG. 39 , the connecting seat 32 includes a first shell 322 and a second shell 324, wherein the first shell 322 has a third groove 323, and the third groove 323 faces the movable seat 33 (or the seat frame 31). The shape of the third groove 323 corresponds to the outer peripheral contour of the movable seat 33. The first plug hole 326 is opened at the groove bottom of the third groove 323. At least a portion of the movable seat 33 is accommodated in the third groove 323 so that the movable seat 33 is clamped with the connecting seat 32, and is plugged and matched with the first plug hole 326 through the connecting shaft 333. For example, a portion of the disc-shaped portion 335 and the truncated cone portion 336 of the movable seat 33 is accommodated in the third groove 323. The second shell 324 is connected to the seat assembly 2, and optionally, the second shell 324 is fixedly connected to the seat assembly 2. The second shell 324 and the first shell 322 are enclosed to form a receiving chamber 325 , and the receiving chamber 325 is communicated with the third groove 323 .

As shown in FIG. 36 and FIG. 40 , the first guide groove 321 and the third groove 323 are located on the same surface of the connecting seat 32. There are at least two first guide grooves 321, and the number of the first guide grooves 321 is a multiple of two. For example, the first guide grooves 321 include 2, 4, 6, 8, etc. The number of the first guide grooves 321 depends on the number of guide rails 312 and the angle at which the connecting seat 32 (or the seat assembly 2) needs to be reversed. In this embodiment, the guide rails 312 include two, and the first guide grooves 321 include four. In this embodiment, the third groove 323 is a substantially circular groove, and the four first guide grooves 321 are circumferentially arranged on the side wall of the third groove 323, and the four first guide grooves 321 are centrally symmetrically distributed relative to the rotation axis R. The extending direction of every two mutually corresponding first guide grooves 321 is the same as the extending direction of the corresponding guide rail 312. That is, at least two first guide grooves 321 whose extending directions overlap each other are the same group of first guide grooves 321. In this embodiment, the four first guide grooves 321 can be divided into two groups of first guide grooves 321, and the extending directions of the two groups of first guide grooves 321 are parallel to each other. Each group of first guide rails 321 includes two. 32 , when the connecting seat 32 is located at the second moving position, one of each set of first guide grooves 321 is located at the rotating recess 3121, and the other of each set of first guide grooves 321 is located on the side of the second section 3125 of the guide rail 312 away from the rotating recess 3121. At this time, the first guide grooves 321 are disengaged from the guide rail 312, so that the connecting seat 32 can rotate relative to the movable seat 33. After the connecting seat 32 rotates 180 degrees, the first guide groove 321 at the outer end portion 3126 of each set of first guide grooves 321 located at the second section 3125 rotates to the rotating recess 3121, and engages with the first section 3123 of the guide rail 312 when the connecting seat 32 moves from the second moving position back to the first moving position; the first guide groove 321 at the rotating recess 3121 in each set of first guide grooves 321 rotates to the side of the second section 3125 of the guide rail 312 away from the rotating recess 3121, and engages with the second section 3125 of the guide rail 312 when the connecting seat 32 moves from the second moving position to the first moving position.

In other embodiments not shown, the first guide groove 321 may also include an odd number, such as 1, 3, 5, 7, etc. The first guide groove 321 is circumferentially arranged on the side wall of the third groove 323. Here, the first guide groove 321 is taken as one for explanation. When the connecting seat 32 is located at the first moving position, the first guide groove 321 is engaged with one of the guide rails 312, such as the first section 3123 or the second section 3125. When the connecting seat 32 moves to the second moving position, the first guide groove 321 is located at the rotating recess 3121 and disengages from the first section 3123, or the first guide groove 321 is located at a side of the second section 3125 of the guide rail 312 away from the rotating recess 3121 to disengage from the second section 3125. At this time, the connecting seat 32 can rotate relative to the movable seat 33. When the connecting seat 32 rotates 180 degrees relative to the movable seat 33, the first guide groove 321 rotates from the rotating notch 3121 to the side of the second section 3125 of the guide rail 312 away from the rotating notch 3121, or the first guide groove 321 rotates from the side of the second section 3125 of the guide rail 312 away from the rotating notch 3121 to the rotating notch 3121. When the connecting seat 32 moves from the second moving position to the first moving position, the first guide groove 321 engages with the second section 3125 of the guide rail 312 or the first guide groove 321 engages with the first section 3123 to guide the connecting seat 32 to move along the guide rail 312.

In other embodiments, when it is necessary to achieve the reversal of the connecting seat 32 at different angles, that is, to fix the connecting seat 32 at different reversal angles, multiple first guide grooves 321 can be set on the connecting seat 32, and the multiple first guide grooves 321 are circumferentially distributed on the side wall of the third groove 323.

Taking the case where there are four first guide grooves 321 as an example, the reversing principle of the seat assembly 2 in the embodiment of the present invention is as follows: when the connecting seat 32 is in the first moving position, as shown in Figure 30, the reversing release member 341 is pushed to move the reversing release member 341 from the reversing locking position to the reversing releasing position, as shown in Figures 32 and 34. At this time, the first recess 3411 of the reversing release member 341 is located at the switching recess 3122 of the guide rail 312, and the guide rail 312 can pass through the first recess 3411 and the reversing release member 341 can move relative to the guide rail 312 in the second direction D2. At this time, the seat assembly 2 or the connecting seat 32 and the movable seat 33 are pushed, so that the connecting seat 32, the movable seat 33 and the seat assembly 2 are moved to the second moving position, and the movable column 36 is driven to move in the third receiving groove 313 accordingly. At this time, two of the first guide grooves 321 on the connecting seat 32 move to the rotating recess 3121, and the remaining two first guide grooves 321 on the connecting seat 32 move to the side of the second section 3125 of the guide rail 312 away from the rotating recess 3121. At this time, all the first guide grooves 321 are disengaged from the guide rail 312, so that the connecting seat 32 can rotate 360 degrees relative to the movable seat 33. When the connecting seat 32 is at the second moving position, the seat assembly 2 or the connecting seat 32 is pushed to rotate 180 degrees or other required angles relative to the movable seat 33, so that each set of first guide grooves 321 is located at a position colinear with the corresponding guide rail 312, so that the first guide grooves 321 can be re-engaged with the guide rail 312. At this time, the external force applied to the seat assembly 2 or the connecting seat 32 is removed, and under the elastic restoring force of the movable reset member 37, the movable column 36 moves to the initial position before the reversing release member 341 is pushed or pulled, and drives the connecting seat 32 to move along the guide rail 312 through the movable seat 33. When the connecting seat 32 moves to the first moving position, the first recess 3411 of the reversing release member 341 is located at the switching recess 3122, so that the reversing release member 341 can move along the second direction D2 relative to the guide rail 312. At this time, the external pushing force applied to the reversing release member 341 is removed, and under the elastic restoring force of the reversing reset member 342, the reversing release member 341 moves from the reversing release position to the reversing locking position, thereby fixing the connecting seat 32 at the angle after the reversal.

When the seat assembly 2 changes direction, it first moves from the relatively rearward first moving position to the relatively forward second moving position, which can avoid interference between the child's legs and the push rod frame 400 during the change of direction, thereby achieving that the child can directly change direction when sitting on the seat assembly 2 without getting off the seat assembly 2.

In one embodiment, as shown in FIG. 38 , the seat locking device 3 further includes a second locking mechanism 35, and the connecting seat 32 is detachably connected to the movable seat 33 through the second locking mechanism 35. The second locking mechanism 35 is disposed on the connecting seat 32. The second locking mechanism 35 includes a separation locking member 351, a separation release member 352, and a separation reset member 353. The separation locking member 351 can be engaged with the aforementioned slot 331 of the movable seat 33. The separation release member 352 is drivingly connected to the separation locking member 351, and the separation release member 352 can be operated to release the engagement between the separation locking member 351 and the slot 331.

As shown in FIG39 and FIG43, the separation lock 351 is movably disposed on the connection seat 32 and has a hook portion 3511. The connection seat 32 is also provided with a first opening 327, and the third groove 323 is connected to the receiving chamber 325 through the first opening 327. At least a portion of the separation lock 351 is received in the receiving chamber 325, and the hook portion 3511 of the separation lock 351 can pass through the first opening 327 and engage with the slot 331. The separation lock 351 can be switched between a separation locking position and a separation unlocking position. When the separation lock 351 is in the separation lock position, the hook portion 3511 can pass through the first opening 327 to engage with the slot 331. When the separation lock 351 is in the separation unlock position, the hook portion 3511 can exit the slot 331 to release the engagement with the slot 331. The separation lock 351 also has a wedge surface 3512, and the wedge surface 3512 is located on the hook portion 3511. The wedge-shaped surface 3512 is suitable for being pushed by the movable seat 33 to move the separation locking member 351 from the separation locking position to the separation unlocking position, and the disc-shaped portion 335 of the movable seat 33 can move along the wedge-shaped surface 3512 and pass over the hook portion 3511 to move between the hook portion 3511 and the groove bottom of the third groove 323. Then, the separation locking member 351, which loses the pushing force of the movable seat 33, moves to the separation locking position under the elastic force of the separation reset member 353 (described later) and automatically engages with the clamping groove 331.

Further, as shown in Figures 41 and 43, the separation lock 351 includes a first separation lock 351a and a second separation lock 351b, the first separation lock 351a is provided with a first protrusion 3513, and the first protrusion 3513 is suitable for drivingly connecting with the separation release 352 to drive the separation lock 351 to move. The second separation lock 351b is provided with a second protrusion 3514, and the side surface of the second protrusion 3514 forms a locking driving surface 3515. The locking driving surface 3515 is suitable for drivingly connecting with the separation release 352 to drive the second separation lock 351b to move. The first moving direction DM1 of the first separation locking member 351a and the second moving direction DM2 of the second separation locking member 351b form an angle. The first separation locking member 351a includes two, and the two first separation locking members 351a are symmetrically distributed relative to the rotation axis R of the connecting seat 32. The second separation locking members 351b include two, and the two second separation locking members 351b are symmetrically distributed relative to the rotation axis R of the connecting seat 32. The two second separation locking members 351b are spaced apart from the two first separation locking members 351a. Each first separation locking member 351a forms an angle with the adjacent second separation locking member 351b, and the angle is about 90 degrees, that is, the angle between the first moving direction DM1 and the second moving direction DM2 is 90 degrees. According to other embodiments not shown in the figure, at least two separation locking members 351, such as 2, 3, 5, 6, etc., can be provided, and at least two separation locking members 351 are evenly arranged around the third groove 323 (see FIG. 40) so that the force is more balanced when the connecting seat 32 and the movable seat 33 are engaged. Among them, the at least two separation locking members 351 can include only two first separation locking members 351a, or only include at least two second separation locking members 351b. Alternatively, the at least two locking members include a first separation locking member 351a and at least one second separation locking member 351b, or include a second separation locking member 351b and at least one first separation locking member 351a. The present invention is not limited thereto.

As shown in Figures 39, 41 and 43, the separation release member 352 includes two, namely, a first separation release member 352a and a second separation release member 352b. The release driving surface 3523 includes a first release driving surface 3523a and a second release driving surface 3523b. The first separation release member 352a has the first release driving surface 3523a, and the second separation release member 352b has the second release driving surface 3523b. The first separation release member 352a and the second separation release member 352b are symmetrically distributed relative to the rotation axis R. The structures of the first separation release member 352a and the second separation release member 352b are completely the same. For the convenience of description, the first separation release member 352a is used as an example for description. The bottom wall of the receiving chamber 325 of the connecting seat 32 is also provided with a second groove 3252 (see FIG. 42 ), and the second groove 3252 is a cross-shaped groove. Both separation release members 352 are accommodated in the second groove 3252 and can move along the second groove 3252, thereby limiting the moving direction of the two separation release members 352 and limiting the moving stroke of the two.

As shown in FIGS. 41 to 43 , the first separation release member 352a includes a separation drive portion 3525 and a separation operating portion 3526. The connecting seat 32 is provided with a second opening 328 penetrating the accommodating chamber 325, and the separation operating portion 3526 extends out of the accommodating chamber 325 through the second opening 328 so as to be operated. The separation operating portion 3526 is provided with an operating end portion 3528, and the operating end portion 3528 extends from the separation operating portion 3526 in a direction away from the seat assembly 2 so as to facilitate gripping and operating the separation operating portion 3526. Referring to FIG. 41 , in some embodiments, the separation operating portion 3526 is further provided with an operating hole 3527 so that the separation operating portion 3526 is more convenient to grip and operate. The separation drive part 3525 is located in the accommodating chamber 325, and the separation operation part 3526 can drive the separation drive part 3525 to move in the accommodating chamber 325 when it is operated. The moving direction of the separation release member 352 is parallel to the first moving direction DM1. A boss 329 is provided in the accommodating chamber 325, and the boss 329 is coaxially arranged with the first plug hole 326. The first separation release member 352a is provided with a second plug hole 3524, and the cross section of the second plug hole 3524 is approximately elliptical. The second plug hole 3524 is inserted and matched with the boss 329 to limit the moving stroke of the separation release member 352. The first separation release member 352a is approximately "T"-shaped.

Further, as shown in FIG. 41 and FIG. 43 , the first separation release member 352a is provided with a first driving groove 3521 and a second driving groove 3522a. The first protrusion 3513 of the first separation lock member 351a is inserted into the first driving groove 3521 and can move along the first driving groove 3521. The extension direction of the first driving groove 3521 is parallel to the first moving direction DM1. The groove wall of the second driving groove 3522a forms a first release driving surface 3523a, and the first release driving surface 3523a is at an angle with the second moving direction DM2, for example, 45 degrees, and is at an angle with the first moving direction DM1, for example, 45 degrees. The second protrusion 3514 of the second separation locking member 351b is inserted into the second driving groove 3522a, and the release driving surface 3523 is suitable for abutting against the locking driving surface 3515 to drive the second separation locking member 351b to move along the second moving direction DM2. The second driving groove 3522a includes two, and the two second driving grooves 3522a are symmetrically distributed with respect to the rotation axis R. Correspondingly, there are also two first release driving surfaces 3523a, and the two first release driving surfaces 3523a are both arranged on the separation driving portion 3525 of the first separation release member 352a and symmetrically distributed with respect to the second plug hole 3524. The first separation release member 352a is drivingly connected to the two second separation locking members 351b through the two second driving grooves 3522a. Similarly, the second separation release member 352b is provided with two second driving grooves 3522b, and the groove wall of each second driving groove 3522a forms a second release driving surface 3523b. The second separation release member 352b is drivingly connected to the two second separation locking members 351b through the two second driving grooves 3522a. Specifically, each first release driving surface 3523a abuts against the first locking driving surface 3515a of the corresponding second separation locking member 351b, and each second release driving surface 3523b of the second separation locking member 352b abuts against the second locking driving surface 3515b of the corresponding second separation locking member 351b.

41 , the separation drive portion 3525 of the first separation release member 352a at least partially overlaps with the separation drive portion 3525 of the second separation release member 352b, and the first release drive surface 3523a and the corresponding second release drive surface 3523b are arranged at an angle, for example, the first release drive surface 3523a and the corresponding second release drive surface 3523b form a 90-degree angle. The second protrusion 3514 of each second separation locking piece 351b is simultaneously inserted into the corresponding second driving groove 3522a of the first separation releasing piece 352a and the corresponding second driving groove 3522b of the second separation releasing piece 352b, the first locking driving surface 3515a of each second separation locking piece 351b abuts against the corresponding first releasing driving surface 3523a of the first separation releasing piece 352a, and the second locking driving surface 3515b of each second separation locking piece 351b abuts against the corresponding second releasing driving surface 3523b of the second separation releasing piece 352b. That is to say, each second separation locking member 351b is simultaneously drivenly connected to the first separation releasing member 352a and the second separation releasing member 352b, so that when the first separation releasing member 352a and the second separation releasing member 352b move away from or approach each other, the corresponding second separation locking member 351b is simultaneously driven to move along the second moving direction DM2, so that the second separation locking member 351b can move more smoothly along the second moving direction DM2. In some other embodiments not shown, one of the two second separation locking members 351b may be drivingly connected to the first separation release member 352a, and the other of the two second separation locking members 351b may be drivingly connected to the second separation release member 352b.

In one embodiment, as shown in FIG. 39 and FIG. 43 , the separation reset member 353 is disposed between the separation lock member 351 and the connection seat 32, and the separation reset member 353 is suitable for biasing the separation lock member 351 so that the separation lock member 351 moves to the separation lock position. The separation reset member 353 includes elastic members such as a spring and a spring sheet. In this embodiment, the separation reset member 353 is a compression spring. The separation reset member 353 is accommodated in the accommodation chamber 325, and one end of the separation reset member 353 abuts against the side wall 3251 of the accommodation chamber 325, and the other end abuts against the separation lock member 351. The number of separation reset members 353 corresponds to the number of separation lock members 351, so that each separation reset member 353 can bias the corresponding separation lock member 351 to move the separation lock member 351 to the separation lock position, thereby driving the corresponding separation release member 352 to move to the initial position before being operated. In some other embodiments not shown, the number of separation reset members 353 can be less than the number of separation lock members 351. For example, there are four separation lock members 351 and two separation reset members 353. The two separation reset members 353 respectively bias one of the adjacent first separation lock members 351a and one of the second separation lock members 351b to move toward the separation lock position, thereby driving the corresponding separation release member 352 to move to the initial position before being operated, and then through the driving connection between the separation lock member 351 and the separation release member 352, the remaining first separation lock members 351a and second separation lock members 351b are driven to move to the separation lock position.

The principle of disassembly and assembly of the seat assembly 2 in the embodiment of the present invention is as follows: when the seat assembly 2 needs to be disassembled, as shown in FIG41, the first separation release member 352a and the second separation release member 352b arranged opposite to each other are pulled at the same time, that is, the first separation release member 352a and the second separation release member 352b are operated to move away from each other along the DM1 direction. In this process, the two first separation lock members 351a are driven away from each other along the first moving direction DM1 by the plug-in cooperation between the first protrusion 3513 and the first driving groove 3521, so that the hook parts 3511 of the two first separation lock members 351a are separated from the clamping groove 331 of the movable seat 33 respectively (see FIG38). Furthermore, each first release driving surface 3523a of the first separation release member 352a abuts against the first locking driving surface 3515a of the corresponding first separation locking member 351a, and each second release driving surface 3523b of the second separation release member 352b abuts against the second locking driving surface 3515a of the corresponding first separation locking member 351a. The driving surface 3515b abuts against the second separating locking members 351b, driving the two second separating locking members 351b away from each other along the second moving direction DM2, so that the hook parts 3511 of the two second separating locking members 351b are separated from the slots 331 respectively, thereby realizing the separation of the connecting seat 32 and the movable seat 33, and further realizing the separation of the seat assembly 2 from the frame 1. In the process of disassembling the seat assembly 2, there is no need to operate the reversing release member 341.

When the seat assembly 2 is to be mounted on the vehicle frame 1, as shown in FIGS. 38 and 39, the connecting seat 32 and the movable seat 33 are moved closer to each other so that the movable seat 33 is at least partially accommodated in the third groove 323 of the connecting seat 32. In this process, the movable seat 33 pushes against the wedge surface 3512 of the separation locking member 351 to drive the separation locking member 351 to move from the separation locking position to the separation release position. At this time, the disc-shaped portion 335 of the movable seat 33 can move along the wedge surface 3512 and pass over the hook portion 3511 to move between the hook portion 3511 and the groove bottom of the third groove 323. When the movable seat 33 is separated from the wedge-shaped surface 3512, the movable seat 33 no longer pushes against the wedge-shaped surface 3512, and the separation locking member 351, which loses the pushing force of the movable seat 33, moves to the separation locking position under the elastic force of the separation reset member 353 and automatically engages with the locking groove 331. Thus, the connection between the connecting seat 32 and the movable seat 33 is realized, and then the seat assembly 2 is installed on the frame 1.

The baby stroller of the present invention has at least the following technical effects: the baby stroller of the present invention comprises the above-mentioned frame 1, and the above-mentioned frame 1 can drive the first wheel frame 100, the second wheel frame 200 and the push rod frame 400 to rotate and fold through the folding mechanism 500, so as to facilitate storage and carrying. The handle 423 of the push rod frame 400 is drivingly connected to the release assembly 520 of the folding mechanism 500, so that the user can fold the frame 1 without bending down, and the operation is simple and quick.

The stroller of the present invention comprises a seat locking device 3, and the connecting seat 32 or the seat assembly 2 can be moved or fixed relative to the seat frame 31 by switching the first locking mechanism 34 between the release state and the locking state. When the first locking mechanism 34 is in a locked state, the connecting seat 32 is in a first moving position and cannot move or rotate relative to the seat frame 31; when the first locking mechanism 34 is in a released state, the connecting seat 32 can move between the first moving position and the second moving position, and when the connecting seat 32 moves to the second moving position, the connecting seat 32 can rotate relative to the seat frame 31, so that the connecting seat 32 and the seat assembly 2 can rotate to a desired angle. At this time, the connecting seat 32 can be moved to the first moving position, so that the connecting seat 32 cannot rotate relative to the seat frame 31, thereby fixing the connecting seat 32 at a desired angle, and further fixing the seat assembly 2 at a desired angle. The reversing process of the stroller and the seat locking device 3 is simple, easy to operate and implement.

In the stroller including the seat locking device 3 of the present invention, the connection seat 32 and the seat frame 31 can be easily disassembled and assembled by operating the second locking mechanism 35. This can meet the need for reversing the stroller and the need for separating the seat assembly 2 of the stroller from the frame 1. The second locking mechanism 35 is simple in structure and easy to operate.

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

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

1: Frame 100: First wheel frame 110: First support assembly 111: First support rod 112: First rotating seat 1121: First pivot 1122: First connecting portion 1123: Second guide groove 1124: Second limiting convex 1125: Locking concave 120: First connecting rod 200: Second wheel frame 210: Second support assembly 211: Second support rod 212: Second rotating seat 2121: Third limiting convex 2122: Mounting boss 2123: Mounting groove 220: Second connecting rod 2: Seat assembly 3: Seat locking device 31: Seat frame 311: Support portion 312: Guide rail 3121: Rotating concave 3122: switching notch 3123: first section 3124: second section 3125: third section 3126: outer end 3127: chamfer or rounded corner 313: third receiving groove 314: limiting convex part 315: mounting sleeve 3151: receiving groove 3152: through hole 3153: mounting column 32: connecting seat 321: first guide groove 322: first shell 323: third groove 324: second shell 325: receiving chamber 3251: side wall of receiving chamber 3252: second groove 326: first plug hole 327: first opening 328: second opening 329: boss 33: movable seat 331: slot 332: second guide groove 333: connecting shaft 334: Accommodation cavity 335: Disk-shaped portion 336: Cone-shaped portion 337: Through hole 34: First locking mechanism 341: Reversing release member 3411: First recess 3412: Positioning groove 3413: Reversing operation portion 3414: Limiting portion 342: Reversing reset member 343: Positioning pin 35: Second locking mechanism 351: Separation locking member 351a: First separation locking member 351b: Second separation locking member 3511: Hook body portion 3512: Wedge-shaped surface 3513: First protrusion 3514: Second protrusion 3515: Locking driving surface 3515a: First locking driving surface 3515b: Second locking driving surface 352: Separation release lock 352a: First separation release lock 352b: Second separation release lock 3521: First driving groove 3522a/3522b: Second driving groove 3523: Release driving surface 3523a: First release driving surface 3523b: Second release driving surface 3524: Second plug hole 3525: Separation driving part 3526: Separation operating part 3527: Operating hole 353: Separation reset part 36: Active column 37: Moving reset part 400: Push rod frame 410: Push rod assembly 411: First push rod 411a: Accommodation chamber 412: Second push rod 413: Anchor seat 4131: Second pivot part 4132: Second connection part 4133: First accommodation chamber 4135: First limiting protrusion 414: Guide seat 414a: First groove 420: Grip assembly 421: Connecting sleeve 4211: First sleeve part 4212: Second sleeve part 4212a: Insertion port 4212b: Abutment boss 4212c: Operation hole 4212d: First mounting recess 422: Grip body 423: Handle 4231: Connecting protrusion 424: Closing cover 500: Closing mechanism 510: Rotating shaft 520: Release assembly 521: Locking member 5211: reset cavity 5212: abutment cavity wall 5213: first set of columns 522: driving member 5221: connecting groove 5222: second mounting recess 523: pulling member 524: first reset member 525: safety release member 5251: moving part 5252: operating part 526: limiting member 5261: second set of columns 527: second reset member 530: linkage assembly 531: first connecting rod 532: second connecting rod 533: third connecting rod 534: driving shaft 535: center gear 536: rotating disk 5361: first guide groove 5362: toothed edge 5363: first end 5364: second end 537: Planetary gear 610: Length adjustment mechanism 611: Second locking hole 612: Second locking pin 613: Length adjustment operating member 614: Linking member 615: Fourth reset member 617b: Second drive pin 620: Seat height adjustment mechanism 621: First locking hole 622: First locking pin 623: Height adjustment operating member 6231: Operating end 6232: Pivot end 6233: Abutment groove 624: Third reset member 710: Fastener 720: Pivot 800: Wheel assembly R: Rotation axis D1: First direction D2: Second direction DM1: First moving direction DM2: Second moving direction

FIG. 1 is a schematic structural diagram of a stroller provided by an embodiment of the present invention, wherein the seat assembly is in a forward unfolded state.

FIG. 2 is another schematic diagram of the structure of the stroller of FIG. 1 , wherein the seat assembly is in a rearward unfolded state.

FIG. 3 is another schematic diagram of the structure of the stroller of FIG. 1 , wherein the seat assembly is in a folded state.

FIG. 4 is an exploded view of the stroller of FIG. 1 .

FIG5 is an enlarged view of point A in FIG4.

FIG. 6 is an exploded view of the linkage assembly and a portion of the frame shown in FIG. 5 .

FIG. 7 shows an exploded view of the linkage assembly and a portion of the frame of FIG. 5 from another perspective.

FIG. 8 is a cross-sectional view of the push rod frame and the seat frame in the stroller of FIG. 1 .

FIG. 9 is an enlarged view of point B in FIG. 8 .

FIG. 10 is an enlarged view of point C in FIG. 8 .

FIG. 11 is a schematic structural diagram of a push rod frame and a partial release assembly in the stroller of FIG. 1 .

FIG. 12 is a partial cross-sectional view of FIG. 11 .

FIG. 13 is another partial cross-sectional view of FIG. 11 .

FIG. 14 is a partial cross-sectional view of FIG. 5 .

FIG. 15 is an enlarged view of point D in FIG. 8 .

FIG. 16 is a partial cross-sectional view of the push rod frame in the stroller of FIG. 1 .

FIG. 17 is an enlarged view of point E in FIG. 8 .

FIG. 18 is a schematic structural diagram of a stroller provided by another embodiment of the present invention, wherein the seat assembly is in a forward unfolded state.

FIG. 19 is another schematic diagram of the structure of the stroller of FIG. 18 , wherein the seat assembly is in a rearwardly unfolded state.

FIG. 20 is another schematic diagram showing the structure of the stroller of FIG. 18 , wherein the seat assembly is in a folded state.

FIG. 21 is an exploded view of the stroller of FIG. 18 .

FIG. 22 shows another exploded view of the stroller of FIG. 18 .

FIG. 23 is an enlarged view of point F in FIG. 22 .

FIG. 24 is a schematic structural diagram showing a portion of the frame of FIG. 22 from another perspective.

FIG. 25 shows an exploded view of the linkage assembly and a portion of the frame of FIG. 23 .

FIG. 26 shows an exploded view of the linkage assembly and a portion of the frame of FIG. 23 from another perspective.

FIG. 27 shows a cross-sectional view of FIG. 24 at A-A.

FIG. 28 shows a cross-sectional view of B-B of FIG. 24 .

FIG. 29 shows a C-C cross-sectional view of FIG. 24 .

FIG. 30 is a schematic diagram showing the structure of the seat frame and the movable seat of the seat locking device in the stroller of FIG. 1 , wherein the seat is connected in a first moving position.

FIG. 31 is another schematic diagram showing the structure of the seat frame and the movable seat of the seat locking device in the stroller of FIG. 1 , wherein the seat is connected to a second moving position and rotated to a certain angle.

Figure 32 shows an exploded view of the seat frame and movable seat of Figure 30.

Figure 33 shows a cross-sectional view of the seat frame and movable seat shown in Figure 30, wherein the first locking mechanism is in a locked state.

Figure 34 shows another cross-sectional view of the seat frame and movable seat shown in Figure 30, wherein the first locking mechanism is in the unlocked state.

FIG. 35 is a schematic structural diagram showing a partial structure of the stroller of FIG. 1 from another perspective, wherein the seat is connected to a second moving position and rotated at a certain angle.

FIG. 36 is an enlarged view of point G in FIG. 35 .

FIG. 37 shows a cross-sectional view of the stroller of FIG. 35 with the attached seat in a first movement position.

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

FIG. 39 is an enlarged view of point I in FIG. 38 .

FIG. 40 is a schematic diagram showing the structure of the seat assembly and the connecting seat in the stroller of FIG. 1 .

FIG. 41 is a cross-sectional view of the second locking mechanism and the connecting seat in the stroller of FIG. 40 .

FIG. 42 shows an exploded view of the seat assembly, the connecting seat and the second locking mechanism of FIG. 40 from another perspective.

FIG. 43 is an exploded view of the second locking mechanism shown in FIG. 42 .

1: Frame

2: Seat assembly

3: Seat locking device

31: Seat frame

32: Connector

33: Movable seat

100: First wheel frame

110: First support assembly

120: First connecting rod

200: Second wheel frame

210: Second

Support components

220: Second connecting rod

410: Push rod assembly

411: First putt

412: Second putt

413: hinged socket

420: Grip assembly

421: Connecting sleeve

423: Grip

424: Close the lid

800:Wheel assembly

Claims (13)

A frame, comprising: A first wheel frame, comprising a first support assembly; A second wheel frame, comprising a second support assembly; A push rod frame, comprising a push rod assembly; and A folding mechanism, comprising a linkage assembly and a rotating shaft; wherein the first support assembly, the second support assembly and the push rod assembly are pivotally connected via the rotating shaft, and the first support assembly and the second support assembly can be folded and rotated relative to the push rod assembly via the linkage assembly. A frame as described in claim 1, wherein the linkage assembly includes: a first link, one end of which is rotatably connected to the push rod assembly; a second link, one end of which is rotatably connected to the other end of the first link, and the other end of the second link is rotatably connected to the first support assembly; and a third link, one end of which is rotatably connected to the other end of the first link, and the other end of the third link is rotatably connected to the second support assembly. The frame as claimed in claim 1, wherein the linkage assembly comprises: a center gear fixed to the push rod assembly; a turntable fixed to the first support assembly and having a first guide groove, wherein the first guide groove has a toothed edge; a planetary gear engaged with both the center gear and the toothed edge; and a drive shaft eccentrically arranged with the rotating shaft, wherein the drive shaft passes through the second support assembly, the planetary gear and the push rod assembly, and the second support assembly is pivotally connected to the push rod assembly via the drive shaft. A frame as described in claim 3, wherein the drive shaft is fixedly connected to the second support assembly and the planetary gear, and the drive shaft can rotate relative to the push rod assembly. A frame as described in claim 3, wherein the toothed edge is an arcuate edge and is arranged along the circumferential direction of the turntable; and/or wherein the toothed edge has a first end and a second end, for limiting the movement of the planetary gear between the first end and the second end. A frame as described in claim 1, wherein the push rod frame also includes a grip assembly, and the folding mechanism further includes a release assembly, wherein the grip assembly is drivingly connected to the release assembly, and the grip assembly can be operated to drive the release assembly to release, so that the first support assembly and the second support assembly can be rotated and folded relative to the push rod assembly through the linkage assembly. The frame as claimed in claim 1, wherein the first support assembly includes a first rotating seat, the first rotating seat has a locking recess, the release assembly includes a locking member, when the release assembly is in a locked state, the locking member is inserted into the locking recess so that the push rod assembly and the first support assembly are fixed relative to each other, when the release assembly is in a released state, the locking member is disengaged from the locking recess so that the push rod assembly can rotate relative to the first support assembly; and/or wherein the release assembly further includes: a driving member, which is arranged on the push rod frame and is drivingly connected to the grip assembly; and a traction member, the two ends of which are respectively connected to the driving member and the locking member; The handle assembly can be operated to drive the driving member to move, thereby driving the locking member to disengage from the locking recess through the pulling member. A frame as described in claim 7, wherein the grip assembly includes a grip and a grip body, the grip is rotatably disposed on the grip body, the drive member is connected to the grip and can rotate with the grip; and/or wherein the release assembly further includes: a safety release member movable between a first position and a second position; wherein when the safety release member is in the first position, the grip cannot be operated to activate the drive member, and when the safety release member is in the second position, the grip can be operated to activate the drive member; and/or wherein the release assembly further includes: a limit member movably disposed on the push rod frame; When the safety release is in the first position, the limiter restricts the movement of the driving member; when the safety release is in the second position, the limiter releases the restriction on the movement of the driving member, and the safety release can be operated to move from the first position to the second position. A stroller, comprising: a frame as described in any one of claims 1 to 8; a seat frame disposed on the push rod frame; and a seat assembly disposed on the seat frame. A stroller as described in claim 9, wherein the seat frame is movable along the push rod assembly, and the stroller further includes a seat height adjustment mechanism arranged between the push rod frame and the seat frame, the seat height adjustment mechanism has a locked state and a released state, when the seat height adjustment mechanism is in the locked state, the seat frame and the push rod assembly are fixed relative to each other, when the seat height adjustment mechanism is in the released state, the seat frame can move relative to the push rod assembly to make the height of the seat assembly adjustable. The stroller as described in claim 9, further comprising a seat height adjustment mechanism disposed between the push rod frame and the seat frame, the seat height adjustment mechanism comprising: a plurality of first locking holes disposed on the push rod assembly; and a first locking pin disposed on the seat frame, the first locking pin being movable between a third position and a fourth position; wherein the first locking pin can be inserted and matched with one of the first locking holes when it is in the third position, and can be disengaged from the first locking hole when it is in the fourth position; and/or wherein the seat height adjustment mechanism further comprises: a height adjustment operating member, comprising: a pivot end pivotally connected to the first locking pin; and an operating end operable to drive the first locking pin to move to the fourth position via the pivot end. A cart as described in claim 9, wherein the length of the push rod assembly is adjustable; and/or The cart further comprises a push rod length adjustment mechanism, wherein the push rod assembly comprises a first push rod and a second push rod, wherein the first push rod is at least partially inserted into the second push rod, and the push rod length adjustment mechanism comprises: A plurality of second locking holes, which are arranged on the second push rod; and A second locking pin, which is arranged on the first push rod and is movable between a fifth position and a sixth position; wherein the second locking pin can be inserted and matched with one of the second locking holes when it is in the fifth position, and can be released from the second locking hole when it is in the sixth position; and/or wherein the push rod length adjustment mechanism comprises: A length adjustment operating member, which is arranged on the first push rod and drivingly connected to the second locking pin; wherein the length adjustment operating member can be operated to drive the second locking pin to move toward the sixth position. The stroller as described in claim 9 further comprises: a connecting seat, arranged on the seat assembly, the connecting seat being movably connected to the seat frame, the connecting seat having a first moving position and a second moving position, when the connecting seat is in the first moving position, the connecting seat cannot rotate relative to the seat frame, and when the connecting seat is in the second moving position, the connecting seat can rotate relative to the seat frame; and a first locking mechanism, switchable between a release state and a locking state, when the first locking mechanism is in the release state, the connecting seat can move relative to the seat frame between the first moving position and the second moving position; when the first locking mechanism is in the locking state, the connecting seat cannot move relative to the seat frame.