CN119705577A

CN119705577A - Strollers

Info

Publication number: CN119705577A
Application number: CN202411312733.9A
Authority: CN
Inventors: 易小龙
Original assignee: China Wonderland Nurserygoods Co Ltd
Current assignee: China Wonderland Nurserygoods Co Ltd
Priority date: 2023-09-28
Filing date: 2024-09-19
Publication date: 2025-03-28
Also published as: CN223290913U

Abstract

The present application relates to a child stroller, comprising: a frame body, comprising a wheel frame and a handle frame, the handle frame being pivotally connected to the wheel frame so that the frame body can be switched between an unfolded state and a folded state; a seat assembly, comprising a seat portion and a backrest portion, the seat portion and the backrest portion being pivotally connected to each other and forming a first pivot point, and the seat portion being pivotally connected to the frame body and forming a second pivot point; and a folding mechanism, comprising a driving assembly and a linkage, the driving assembly being pivotally connected between the handle frame and the wheel frame, and the linkage being pivotally connected to the driving assembly and the seat portion respectively; when the frame body is switched from an unfolded state to a folded state, the driving assembly pivots relative to the wheel frame or the handle frame and drives the first pivot point of the seat portion to rotate upward along a first direction around the second pivot point through the linkage, thereby driving the seat assembly to fold.

Description

Child cart

Technical Field

The application relates to the technical field of wheel type mobile devices, in particular to a child cart.

Background

It has become very common and convenient for families with infants to use a child stroller as an auxiliary care tool when going out. The child stroller is mainly composed of a frame and a seat, and most of the child stroller adopts a foldable design. When the child cart is not needed, the size of the child cart can be reduced by folding the cart frame and the seat, so that the child cart is convenient to store or carry.

Generally, a child stroller seat includes a seat portion, a backrest portion, and a flexible cloth cover disposed over the seat portion and the backrest portion. When the frame is folded, the seat part and the backrest part can rotate together with the frame, so that the synchronous folding of the seat is realized. However, when the seat of the child stroller commonly used in the market is folded along with the frame, the flexible cloth sleeve at the pivot joint of the seat part and the backrest part can loose. This results in loose portions of the sleeve being easily contacted by the ground during folding, which not only tends to soil the sleeve, but also may cause wear to the sleeve.

In addition, in order to meet the practicality and convenience of users to the child cart, a folding mechanism is generally arranged on the child cart, and the users can switch the child cart between an unfolding state and a folding state through the folding mechanism. In addition, in order to facilitate the user to place the carried articles, the burden of the user is reduced, and a basket with a containing space is arranged under the seat of the child cart. However, the basket is positioned below the seat and is limited by the structure of the folding mechanism, so that the child cart is easy to operate in a complicated way when being folded, the folding is not smooth, and the folding difficulty of the child cart is increased.

Disclosure of Invention

According to various embodiments of the present application, a stroller is provided.

According to one aspect of the application there is provided a stroller comprising a frame body including a wheel frame and a handle frame, the handle frame and the wheel frame being pivotally connected to each other to allow the frame body to be switched between an extended condition and a collapsed condition, a seat assembly including a seat portion and a back portion, the seat portion and the back portion being pivotally connected to each other and forming a first pivot point and the seat portion being pivotally connected to the frame body and forming a second pivot point, and a stowing mechanism including a drive assembly and a linkage, the drive assembly being pivotally connected between the handle frame and the wheel frame, the linkage being pivotally connected to the drive assembly and the seat portion, respectively, the drive assembly being pivoted relative to the wheel frame or the handle frame and driving the first pivot point of the seat portion to rotate in a first direction about the second pivot point by the linkage to thereby drive the seat assembly to collapse when the frame body is switched from the extended condition to the collapsed condition.

In one embodiment, the frame comprises a front frame and a rear frame pivoted to each other, the driving assembly comprises a driving piece and a rotating piece, the driving piece is pivoted between the handlebar frame and the rear frame, one end of the rotating piece is pivoted with the front frame, the other end of the rotating piece is pivoted with the driving piece at a first pivot point, the first end of the linkage piece is pivoted with the seat part, the second end of the linkage piece is pivoted with the driving piece or the rotating piece, the first pivot point is located between the front frame and the rear frame when the frame body is in the unfolded state, and the driving piece pivots relative to the rear frame or the handlebar frame and drives the linkage piece to move upwards along a first direction so as to enable the first pivot point of the seat part to rotate upwards around the second pivot point along the first direction when the frame body is switched from the unfolded state to the folded state.

In one embodiment, the driving assembly further comprises a transmission member, the transmission member is arranged on the driving member or the rotating member, the first end of the linkage member is pivoted with the seat part, the second end of the linkage member is pivoted with the transmission member, and the transmission member is positioned between the front wheel frame and the rear wheel frame when the frame body is in the unfolded state.

In one embodiment, the transmission member is disposed at an angle to the driving member or the rotating member.

In one embodiment, the transmission member is disposed on a side of the driving member or the rotating member facing away from the seat assembly.

In one embodiment, the driving member forms a second rotation point on the rear wheel frame, the rotation member forms a third rotation point on the front wheel frame, when the frame body is in the unfolded state, the first rotation point and the transmission member are located between the second rotation point and the third rotation point, and when the driving member pivots around the second rotation point, the driving member drives the rotation member to rotate around the third rotation point and drives the transmission member to rotate around the second rotation point or the third rotation point so as to drive the linkage member to integrally move relative to the frame body, thereby enabling the first pivot point of the seat part to pivot around the second pivot point along the first rotation direction.

In one embodiment, the driving assembly comprises a driving piece and a transmission piece, wherein the driving piece is pivoted between the handlebar frame and the wheel frame, the transmission piece is arranged on the driving piece, the second end of the linkage piece is pivoted with the transmission piece, the first end of the linkage piece is pivoted with the seat part, when the frame body is switched from the unfolding state to the folding state, the driving piece drives the transmission piece to pivot relative to the wheel frame, and the transmission piece drives the linkage piece to move along a first direction so as to enable the first pivot point of the seat part to rotate upwards along the first direction around the second pivot point.

In one embodiment, the transmission piece is arranged on the driving piece, the driving piece comprises a first driving section and a second driving section which are connected, the first driving section is pivoted with the handlebar frame, the second driving section is pivoted with the rear wheel frame of the wheel frame at the second rotation point, the second driving section is pivoted with the rotation piece at the first rotation point, and the transmission piece is arranged on the second driving section.

In one embodiment, the transmission member is integrally formed with the driving member.

In one embodiment, a first included angle is formed between the first driving section and the second driving section, and at least when the frame body is in a unfolded state, an opening of the first included angle is upward arranged along a first direction, and at least one part of the transmission piece is positioned on one side of the second driving section, which is away from the opening of the first included angle.

In one embodiment, the transmission member includes a first segment body and a second segment body connected to each other, and a second included angle is formed between the first segment body and the second segment body, the first segment body is stacked on the driving member and located between the first rotation point and the second rotation point, the second segment body is pivoted to the linkage member, and at least when the frame body is in a unfolded state, an opening of the second included angle is downward arranged along the first direction.

In one embodiment, the linkage is pivotally connected to an end of the second segment remote from the first segment.

In one embodiment, the linkage member and the seat portion are pivoted to a third pivot point, and the third pivot point is located at a side of the second pivot point, which is close to the first pivot point.

In one embodiment, the third pivot point is coaxial with the first pivot point.

In one embodiment, the frame body further comprises a first pivot seat, the wheel frame and the handlebar frame are coaxially pivoted at a fourth pivot point through the first pivot seat, the seat part is pivoted with the first pivot seat and forms a second pivot point, and the second pivot point and the fourth pivot point are coaxially or misplaced.

In one embodiment, the handle bar includes a first handle bar, a second handle bar, and a second pivot base, the second pivot base has a fifth pivot point, the second handle bar is pivoted to the wheel frame and pivoted to the first handle bar through the second pivot base at the fifth pivot point, and the driving assembly is pivoted between the first handle bar and the wheel frame.

In one embodiment, the handle bar further comprises a locking mechanism disposed within the second pivot mount, the locking mechanism having a locked state that limits relative rotation of the first and second handle bars and a released state that allows relative rotation of the first and second handle bars, and a release mechanism disposed on the handle bar and operatively connected to the locking mechanism to allow the locking mechanism to switch between the locked state and the released state.

In one embodiment, the second pivot seat comprises a fixed seat body and a pivot seat body, the fixed seat body and the pivot seat body can pivot around the fifth pivot point, one of the fixed seat body and the pivot seat body is connected with the first hand pushing frame, the other is connected with the second hand pushing frame, the locking mechanism comprises a locking piece and a locking concave part, the locking piece is movably arranged on one of the fixed seat body and the pivot seat body, the locking concave part is formed on the other of the pivot seat body and the fixed seat body, when the locking mechanism is in the locking state, the locking piece is inserted into the locking concave part, and when the locking mechanism is in the unlocking state, the locking piece is retracted from the locking concave part.

In one embodiment, the lock release mechanism comprises a driving wheel rotatably arranged on the first push handle frame, a traction piece connected between the driving wheel and the locking piece, and a first operating piece movably arranged on the first push handle frame and connected with the driving wheel, wherein the first operating piece is provided with a first locking position and a first lock release position, when the first operating piece moves from the first locking position to the first lock release position, the first operating piece drives the driving wheel to rotate, and the driving wheel drives the locking mechanism to switch from the locking state to the lock release state through the traction piece.

In one embodiment, the lock release mechanism further comprises a second operating member pivotally connected to the handlebar frame and provided with a locking part and an operating part capable of being operated, wherein the second operating member is pivotable between a second locking position and a second lock release position, the locking part is positioned on the moving path of the first operating member to limit the movement of the first operating member when the second operating member is positioned at the second locking position, and the locking part is deviated from the moving path of the first operating member to allow the movement of the first operating member when the second operating member is positioned at the first lock release position.

In one embodiment, the lock release mechanism further comprises a first reset member abutting against the second operating member and for biasing the operating portion to pivot the second operating member constantly towards the second locking position.

In one embodiment, the release mechanism further comprises a first mounting base connected with the first push handle frame and provided with a containing cavity, the first mounting base is provided with a first opening penetrating through the bottom wall of the containing cavity and a second opening penetrating through the side wall of the containing cavity, the first operating piece is contained in the containing cavity, at least one part of the first operating piece extends out of the containing cavity through the first opening at least when the first operating piece is located at the first locking position, the locking part of the second operating piece is contained in the containing cavity, and at least one part of the operating part extends out of the containing cavity through the second opening at least when the second operating piece is located at the second locking position.

In one embodiment, the lock release mechanism further comprises a second mounting seat connected with the first push handle frame and at least partially accommodated in the accommodating cavity of the first mounting seat, the driving wheel is rotatably mounted on the second mounting seat, and a first reset piece at least partially accommodated in the accommodating cavity, one end of the first reset piece abuts against an operation part of the second operation piece, and the other end of the first reset piece abuts against the second mounting seat.

In one embodiment, the driving component and the wheel frame are pivoted to a second rotation point, the end part of the first hand pushing frame, which is close to the second hand pushing frame, is provided with a pushing part, the driving component is pivoted between the pushing part and the wheel frame, a fourth rotation point is formed on the pushing part, and the fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-bar structure, so that the frame body is switched between the unfolded state and the folded state through the four-bar structure.

According to one aspect of the application, there is provided a stroller comprising a frame body including a wheel frame and a handle frame pivotally connected to each other to allow the frame body to be switched between an extended state and a collapsed state, a basket bar assembly pivotally connected to the wheel frame and having an extended state and a collapsed state, and a folding mechanism including a drive assembly pivotally connected between the handle frame and the wheel frame and movably connected to the basket bar assembly by the linkage member, the drive assembly being pivoted relative to the wheel frame or the handle frame and driving the basket bar assembly to switch between the extended state and the collapsed state by the linkage member when the frame body is switched between the extended state and the collapsed state.

In one embodiment, the linkage member is pivotally connected to the basket bar assembly and the drive assembly, respectively, and when the drive assembly is pivoted relative to the wheel frame or the handlebar frame, the linkage member is pivoted relative to the drive assembly to allow the basket bar assembly to switch between the extended state and the collapsed state.

In one embodiment, the wheel frame comprises a front wheel frame and a rear wheel frame pivoted with the front wheel frame, the basket rod assembly comprises a front pipe body and a rear pipe body, the front pipe body and the front wheel frame are pivoted with a seventh pivot point and are pivoted with a rear pipe body at a fifth pivot point, the rear pipe body and the rear wheel frame are pivoted with an eighth pivot point, the driving assembly is pivoted between the rear wheel frame and the handlebar frame and is movably connected with the rear pipe body through the linkage component, or the driving assembly is pivoted between the front wheel frame and the handlebar frame and is movably connected with the front pipe body through the linkage component.

In one embodiment, the front pipe body comprises a first pipe section and a second pipe section which are arranged at an included angle, one end of the first pipe section, which is far away from the second pipe section, is pivoted with the front wheel frame at the seventh pivot point, one end of the second pipe section, which is far away from the first pipe section, is pivoted with the rear pipe body at the fifth pivot point, and an opening of the included angle between the first pipe section and the second pipe section is arranged downwards along the first direction.

In one embodiment, when the basket rod assembly is in the extended state, the included angle between the first pipe section and the rear pipe body is basically 180 degrees, and when the basket rod assembly is in the folded state, the included angle between the first pipe section and the rear pipe body is basically 0 degrees.

In one embodiment, the driving assembly forms a second rotation point on the rear wheel frame, the linkage component is pivoted with the rear pipe body and the driving assembly respectively, and when the driving assembly pivots around the second rotation point, the driving assembly drives the linkage component to integrally move relative to the frame body and rotate relative to the driving assembly so as to allow the rear pipe body to rotate around the eighth pivot point, and the front pipe body to rotate around the seventh pivot point.

In one embodiment, the driving assembly is provided with a first driving section and a second driving section, the first driving section is pivoted with the handlebar frame, the second driving section is pivoted with the linkage component, and the second rotation point is located between the first driving section and the second driving section.

In one embodiment, the first driving section and the second driving section are disposed at an included angle, and an opening of the first included angle between the first driving section and the second driving section is disposed upward along a first direction.

In one embodiment, the driving component is pivoted to the rear wheel frame and the handlebar frame and is movably connected with the rear pipe body through the linkage component, and the pivot point of the linkage component and the rear pipe body is located between the fifth pivot point and the eighth pivot point, or the driving component is pivoted to the front wheel frame and the handlebar frame and is movably connected with the front pipe body through the linkage component, and the pivot point of the linkage component and the front pipe body is located between the fifth pivot point and the seventh pivot point.

In one embodiment, the driving assembly is provided with a stop portion for abutting against the interlocking member when the basket bar assembly is in the extended state, so as to limit the interlocking member to pivot relative to the driving assembly, thereby maintaining the basket bar assembly in the extended state.

In one embodiment, the driving assembly and the wheel frame are pivoted to a second rotation point, and the stop portion is disposed on a second driving section of the driving assembly, which is close to the linkage member, and is located on a side of the driving assembly, which is relatively close to the handlebar frame.

In one embodiment, the stroller further comprises a folding aid coupled to the basket bar assembly to allow the basket bar assembly to be driven to switch to the collapsed state by the operating folding aid.

In one embodiment, the wheel frame comprises a front wheel frame and a rear wheel frame pivoted with the front wheel frame, the basket rod assembly comprises a front pipe body and a rear pipe body, the front pipe body and the front wheel frame are pivoted with a seventh pivot point and are pivoted with a fifth pivot point, the rear pipe body and the rear wheel frame are pivoted with an eighth pivot point, the folding auxiliary piece is connected with the rear pipe body, the connecting point of the folding auxiliary piece and the rear pipe body is located between the eighth pivot point and the fifth pivot point, or the folding auxiliary piece is connected with the front pipe body, and the connecting point of the folding auxiliary piece and the front pipe body is located between the seventh pivot point and the fifth pivot point, or the folding auxiliary piece is connected with the fifth pivot point.

In one embodiment, the child stroller further comprises a first pivot seat, the wheel frame and the stroller hand frame are coaxially pivoted at a fourth pivot point through the first pivot seat, the seat assembly is respectively and pivotally connected with the first pivot seat and the driving assembly, and when the frame body is switched from the unfolded state to the folded state, the driving assembly drives the seat assembly to rotate relative to the first pivot seat so as to avoid interference to the folding process of the basket rod assembly.

In one embodiment, the seat assembly is parallel to at least a portion of the basket bar assembly during collapsing of the frame body.

In one embodiment, the driving assembly and the wheel frame are pivoted to a second rotation point, the seat assembly and the first pivot seat are pivoted to a second rotation point, the seat assembly and the driving assembly are pivoted to a seventh rotation point, and the seventh rotation point is positioned at one side of the second rotation point away from the linkage component.

In one embodiment, the seat assembly includes a seat tube set pivotally connected between the first pivot mount and the drive assembly and a seat pan mounted to the seat tube set.

In one embodiment, the seat assembly further comprises a support rod arranged on the seat tube group and positioned on one side of the seat plate facing the basket rod assembly, the support rod and the seat plate are arranged at intervals and form a penetrating channel, and the child stroller further comprises a folding auxiliary piece which is connected with the basket rod assembly and penetrates through the penetrating channel so as to allow the basket rod assembly to be driven to be switched to the folding state by the operation of the folding auxiliary piece.

In one embodiment, the frame body further includes a first pivot seat, the first pivot seat has a fourth pivot point, and the wheel frame and the handlebar frame are coaxially pivoted at the fourth pivot point through the first pivot seat.

In one embodiment, the handle bar includes a first handle bar, a second handle bar, and a second pivot, the second pivot has a fifth pivot point, the second handle bar is pivotally connected to the wheel frame and is pivotally connected to the first handle bar via the second pivot, and the first driving section of the driving assembly is pivotally connected to the first handle bar.

In one embodiment, the stroller further comprises a locking mechanism disposed within the second pivot mount, the locking mechanism having a locked state that limits relative rotation of the first and second push arms and a released state that allows relative rotation of the first and second push arms, and a release mechanism disposed on either the first or second push arms and operably connected to the locking mechanism to allow the locking mechanism to switch between the locked state and the released state.

Drawings

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

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale. In the drawings:

FIG. 1 is a perspective view of a stroller according to an embodiment of the present application;

FIG. 2 is a perspective view of the child stroller of FIG. 1 from another perspective;

FIG. 3 is a perspective view of the stroller of FIG. 1 from another perspective;

FIG. 4 is an enlarged view at A of FIG. 3;

FIG. 5 is an enlarged view at B of FIG. 3;

FIG. 6 is a cross-sectional view taken along line U1-U1 of FIG. 3, with portions of the seat portion omitted;

FIG. 7 is an enlarged view at C of FIG. 6;

FIG. 8 is a schematic view of a portion of a stroller frame of the stroller of FIG. 3;

FIG. 9 is a cross-sectional view taken along line U2-U2 of FIG. 8, with the second operating member in the second locked position and the first operating member in the first locked position;

FIG. 10 is a cross-sectional view taken along line U2-U2 of FIG. 8, with the second operating member in a second unlocked position and the first operating member in a first unlocked position;

FIG. 11 is a cross-sectional view taken along line U3-U3 of FIG. 8, with a portion of the structure of the handlebar exploded;

fig. 12 is an enlarged view of D in fig. 11;

FIG. 13 is a cross-sectional view taken along line U4-U4 of FIG. 3, with the frame body in an expanded state;

FIG. 14 is an enlarged view of FIG. 13 at E;

FIG. 15 is a cross-sectional view taken along line U4-U4 of FIG. 3, wherein the frame body is in a first transitional state between an extended state and a collapsed state;

fig. 16 is an enlarged view of fig. 15 at F;

FIG. 17 is a cross-sectional view taken along line U4-U4 of FIG. 3, wherein the frame body is in a second transitional state between the deployed and collapsed states;

fig. 18 is an enlarged view at G of fig. 17;

FIG. 19 is a side view of the stroller of FIG. 1 with the frame body in a collapsed condition;

FIG. 20 is a perspective view of the stroller frame body of FIG. 1 in a collapsed configuration;

FIG. 21 is a perspective view of a child stroller according to another embodiment of the present application;

FIG. 22 is a perspective view of the child stroller of FIG. 21 from another perspective;

FIG. 23 is a perspective view of the stroller of FIG. 21 with the seat plate omitted;

fig. 24 is an enlarged view of fig. 23 at H;

FIG. 25 is an enlarged view at I of FIG. 23;

FIG. 26 is a cross-sectional view taken along line U5-U5 of FIG. 21, with the stroller in an expanded state;

FIG. 27 is an enlarged view at J of FIG. 26;

FIG. 28 is a cross-sectional view taken along line U5-U5 of FIG. 21, wherein the stroller is in a first transitional state between an expanded state and a collapsed state;

fig. 29 is an enlarged view at K of fig. 28;

FIG. 30 is a cross-sectional view taken along line U5-U5 of FIG. 21, wherein the stroller is in a second transitional state between an expanded state and a collapsed state;

fig. 31 is an enlarged view of fig. 30 at L;

FIG. 32 is a side view of the stroller of FIG. 21 in a collapsed condition;

FIG. 33 is a perspective view of the stroller of FIG. 21 in a collapsed condition;

FIG. 34 is a cross-sectional view taken along line U6-U6 of FIG. 21;

FIG. 35 is a perspective view of the stroller of FIG. 34;

FIG. 36 is a perspective view of the stroller of FIG. 21 with the seat plate omitted, with the stroller provided with a collapsing aid;

FIG. 37 is a cross-sectional view taken along line U5-U5 of FIG. 21 with the stroller in an expanded configuration and with the folding aids;

fig. 38 is a perspective view of the stroller of fig. 21 in a collapsed state, with the stroller provided with a collapsing assist.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

An embodiment of the present invention provides a stroller 1000. The carrier is detachably mounted on the stroller 1000. It should be noted that the child stroller provided by the invention can be suitable for different objects according to the type of the carrier. For example, when the carrier is a seat or a basket, the stroller is suitable for infants. When the carrier is a pet box, the child stroller may also be adapted for use with a pet as a pet stroller.

Fig. 1 to3 illustrate a stroller 1000 according to an embodiment of the present invention, and the overall structure of the stroller 1000 is substantially symmetrical left and right, which may include a frame body 100, a seat assembly 200, and a folding mechanism 300. The description of the stroller 1000 will be given below together with the description of the frame body 100, the seat assembly 200, and the folding mechanism 300.

Referring to fig. 1 to 3, the frame body 100 of the stroller 1000 can include a wheel frame 110 and a handlebar frame 120. Wherein the handlebar 120 and the wheel frame 110 are pivotally connected to each other so that the frame body 100 can be switched between an unfolded state (see fig. 1 and 2) and a folded state (fig. 18 and 19). Specifically, the wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 that are pivotally connected. The handle 120 includes a first push handle 121 and a second push handle 122 pivotally connected. The specific structure of the wheel frame 110 (including the front wheel frame 111 and the rear wheel frame 112) and the handle frame 120 (including the first handle frame 121 and the second handle frame 122) will be further described one by one.

With continued reference to fig. 1-3, in one embodiment, the front wheel frame 111 is, for example, of a U-shaped configuration, including front bars 1111 on the left and right sides and a front cross bar 1112 connected between the two front bars 1111. The front rail 1112 extends generally along a second direction F2, which second direction F2 corresponds to the left-right direction. The front rail 1112 may also be used as a foot pedal when a child is seated on the seat assembly 200 of the stroller 1000.

In one embodiment, at least one front wheel seat 611 is mounted to the bottom of the front wheel frame 111. Specifically, in the present embodiment, as shown in fig. 1 to 3, two front wheel seats 611 are mounted at the bottom of the front wheel frame 111, and the two front wheel seats 611 are disposed at intervals in the left-right direction (i.e., the second direction F2). More specifically, two front wheel seats 611 are installed at both left and right ends of the front rail 1112, and two front rod pieces 1111 are respectively connected to the front wheel seats 611 on the same side. Each front wheel mount 611 is used to mount a front wheel 612 to make the stroller 1000 movable, wherein the front wheel 612 may be a universal wheel or a non-universal wheel. Of course, in another alternative embodiment, the front wheel frame 111 may have other embodiments, for example, the front wheel frame 111 includes only two front bars 1111, one ends of the two front bars 1111 are connected to form a V-shaped structure, and a front wheel seat 611 may be centrally installed at the bottom of the front wheel frame 111. Alternatively, for example, the front wheel frame 111 includes only two front bars 1111 disposed in parallel in the left-right direction, and the two front wheel seats 611 are respectively connected to the two front bars 1111.

Unless specifically stated and limited otherwise, the terms of the "left", "right", etc. orientation of the stroller 1000 in the various embodiments of the present invention are based on the "left", "right" orientation of the stroller 1000 in normal running, and the "left", "right" directions are schematically shown by arrows L, R in the figures. These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

Referring again to fig. 1 to 3, the rear wheel frame 112 has, for example, a U-shaped structure including two rear bars 1121 located at both left and right sides and a rear rail 1122 connected between the two rear bars 1121, the rear rail 1122 extending in the second direction F2. At least one rear wheel seat 621 is mounted to the bottom of the rear wheel frame 112. Specifically, in the present embodiment, two rear wheel seats 621 are mounted at the bottom of the rear wheel frame 112, and the two rear wheel seats 621 are disposed at intervals in the left-right direction (i.e., the second direction F2). More specifically, two rear wheel seats 621 are mounted at both left and right ends of the rear rail 1122, and two rear bar members 1121 are respectively connected to the rear wheel seats 621 on the same side. Each rear wheel seat 621 is used for mounting the rear wheel 622, wherein the rear wheel 622 may be, for example, a universal wheel or a non-universal wheel. In this embodiment, the rear wheels 622 are sized larger than the front wheels 612 to make the overall structure of the stroller 1000 more stable. Of course, in another alternative embodiment, the rear wheel 622 may be the same size as the front wheel 612 or smaller than the front wheel 612.

Alternatively, in another alternative embodiment, the rear wheel frame 112 may have other embodiments, for example, the rear wheel frame 112 includes only two rear bars 1121, one ends of the two rear bars 1121 are connected to have a V-shaped structure, and the bottom of the rear wheel frame 112 may be centrally provided with a rear wheel seat 621. Alternatively, for example, the rear wheel frame 112 includes only two rear bars 1121 disposed in parallel in the left-right direction, and the two rear wheel seats 621 are connected to the two rear bars 1121, respectively.

Referring to fig. 3 to 5, in an embodiment, the frame body 100 further includes a first pivot seat 130. Specifically, the first pivot 130 has a fourth pivot point A4 (or a fourth pivot axis), and the front wheel frame 111 and the rear wheel frame 112 are pivotally connected to the fourth pivot point A4 (or the fourth pivot axis) through the first pivot 130, such that the front wheel frame 111 can rotate about the fourth pivot point A4 with respect to the rear wheel frame 112. Specifically, the upper ends of the two rear levers 1121 are pivotally connected to the upper ends of the front levers 1111 on the same side, for example, through the first pivot blocks 130, respectively, that is, the rear levers 1121 on the same side can pivot about the fourth pivot point A4 corresponding to the first pivot blocks 130 with respect to the front levers 1111 on the same side. In this way, the volume of the wheel frame 110 can be changed to switch the frame body 100 between the unfolded state and the folded state. More specifically, as shown in fig. 4 and 5, the first pivot 130 includes a first housing 131 and a second housing 132, and the first housing 131 and the second housing 132 are stacked and pivot coaxially about a fourth pivot point A4. The connection portion of the first housing 131 is connected to the front lever 1111, and the connection portion of the second housing 132 is connected to the rear lever 1121.

Referring to fig. 3 to 5, in an embodiment, the handlebar 120 may be pivotally connected to the wheel frame 110 by a first pivot 130, for example, and may rotate about a fourth pivot point A4. Specifically, the first pivot seat 130 further includes a third seat 133. The third base 133 is stacked with the second base 132 and the first base 131, and the three can pivot coaxially around the fourth pivot point A4. Specifically, the connection portion of the third seat 133 is connected to the handle bar 120. More specifically, the handle 120 may include, for example, a first handle 121 and a second handle 122 pivotally connected to each other. One end of the second hand-pushing frame 122 far away from the first hand-pushing frame 121 is connected to the third base 133 of the first pivot 130, which is equivalent to that the second hand-pushing frame 122, the front wheel frame 111 and the rear wheel frame 112 are pivotally connected to the fourth pivot point A4. In this way, the folding of the frame body 100 can be achieved in a pivoting manner, so that the frame body 100 can be switched between an unfolded state and a folded state. More specifically, the first hand rest 121 has, for example, a U-shaped structure including two first support rods 1212 and a hand rest 1213 connected between the two first support rods 1212. The pusher bar 1213 extends along the second direction F2 for grasping by a user to push the stroller 1000. More specifically, the second hand pushing frame 122 includes, for example, two second support rods 1221, wherein upper ends of the two second support rods 1221 are respectively pivoted with the first support rods 1212 on the same side, and lower ends of the two second support rods 1221 are respectively connected with the third seat 133 of the first pivot base 130 on the same side.

Referring to fig. 1 to 3, in an embodiment, the handlebar 120 may further include a second pivot base 123, for example, where the second pivot base 123 has a fifth pivot point A5. The first pushing frame 121 and the second pushing frame 122 are pivoted at the fifth pivot point A5 through the second pivot seat 123, that is, the first supporting rod 1212 corresponding to the same side is pivoted with the second supporting rod 1221 located at the same side through the second pivot seat 123, and the first supporting rod 1212 can rotate around the fifth pivot point A5 relative to the second supporting rod 1221. Specifically, as shown in fig. 6, the second pivot base 123 may include, for example, a fixed base body 1231 and a pivot base body 1232. The fixing base body 1231 and the pivoting base body 1232 can pivot coaxially around the fifth pivot point A5. One of the fixed base body 1231 and the pivoting base body 1232 is connected to the first pushing frame 121, and the other is connected to the second pushing frame 122. Specifically, in the present embodiment, the connection portion of the fixing base body 1231 is connected to the second pushing frame 122, and the connection portion of the pivoting base body 1232 is connected to the first pushing frame 121.

To prevent the first push handle 121 from rotating freely relative to the second push handle 122, in one embodiment, as shown in fig. 3 and 6, the vehicle handle 120 further includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is disposed in the second pivot base 123, and the locking mechanism 124 has a locking state that limits the relative rotation of the first pushing frame 121 and the second pushing frame 122, and a releasing state that allows the relative rotation of the first pushing frame 121 and the second pushing frame 122. The lock release mechanism 125 is disposed on the vehicle hand frame 120, such as the first hand frame 121 or the second hand frame 122, and the working principle thereof will be described below by taking the lock release mechanism 125 disposed on the first hand frame 121 as an example. Specifically, the lock release mechanism 125 is operatively connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locked state and the unlocked state, i.e., to allow or restrict relative rotation of the first and second hand rest 121, 122.

Specifically, in the present embodiment, when the frame body 100 is in the unfolded state, the first pushing frame 121 is substantially parallel to the second pushing frame 122, that is, the first pushing frame 121 and the second pushing frame 122 are in the same plane, and the included angle α3 between the first pushing frame 121 and the second pushing frame 122 is 180 degrees (see fig. 3). The locking mechanism 124 is capable of restricting relative rotation of the first and second push racks 121 and 122 to maintain the first and second push racks 121 and 122 in the same plane. When the frame body 100 is in the folded state, the included angle α3 between the first and second push frames 121 and 122 is an acute angle (see fig. 19) or tends to be 0 degrees. Of course, in another alternative embodiment, the included angle α3 between the first and second hand rest 121 and 122 may be an obtuse angle or an acute angle when the frame body 100 is in the unfolded state.

Referring to fig. 6, in one embodiment, the locking mechanism 124 includes a lock 1241 and a lock recess 1242. The locking piece 1241 is movably disposed on one of the fixed base body 1231 and the pivoting base body 1232, and the locking recess 1242 is formed on the other of the pivoting base body 1232 and the fixed base body 1231. Specifically, in the present embodiment, the locking member 1241 is movably disposed in the pivot body 1232, and the locking recess 1242 is formed on the fixing body 1231. When the locking mechanism 124 is in a locked state, the locking member 1241 is inserted into the locking recess 1242 to limit the rotation of the pivot base 1232 relative to the holder base 1231. When the locking mechanism 124 is in the unlocked state, the locking member 1241 is retracted away from the locking recess 1242 to allow the pivot body 1232 to move relative to the mount body 1231.

Referring to fig. 8-12, in one embodiment, the lock release mechanism 125 includes a drive wheel 1251, a traction member 1252, and a first operating member 1253. Wherein the driving wheel 1251 is rotatably provided on the first pusher frame 121. The traction member 1252 is connected between the drive wheel 1251 and the locking member 1241. The first operating member 1253 is movably provided on the first push frame 121 and is connected to the driving wheel 1251. Specifically, the first operating member 1253 has a first lock position and a first unlock position. When the first operating member 1253 moves from the first locking position to the first unlocking position, the first operating member 1253 drives the driving wheel 1251 to rotate, and the driving wheel 1251 drives the traction member 1252 to move to switch the locking mechanism 124 from the locking state to the unlocking state, in other words, the driving wheel 1251 rotates to drive the traction member 1252 to move, so that the locking member 1241 is driven to retract from the locking recess 1242. More specifically, the traction member 1252 may be, for example, a traction rope or the like, one end of which is connected to the driving wheel 1251 and the other end of which is connected to the locking member 1241.

The driving wheel 1251 may be directly connected to the first hand rest 121, or may be indirectly connected to the first hand rest 121. In the present embodiment, the driving wheel 1251 is provided on the first pusher frame 121 by an indirect manner, for example, mounted on the first pusher frame 121 by a second mount 1257 described below.

Referring to fig. 9 to 12, in the present embodiment, the handle rod 1213 of the first handle 121 has a cavity 1214 therein, that is, the handle rod 1213 may be regarded as a hollow tube. The lever wall of the pusher lever 1213 is provided with a mounting port in communication with the cavity 1214. Specifically, a second mount 1257 is mounted within the cavity 1214, and the drive wheel 1251 is mounted to the second mount 1257 via a first axle 1258. More specifically, as shown in fig. 12, the driving wheel 1251 is provided with a first connecting portion 12511, the first connecting portion 12511 is offset from the first rotating shaft 1258, the first operating member 1253 has a second connecting portion 12531, and the first connecting portion 12511 is mated with the second connecting portion 12531 in a concave-convex manner to perform connection. For example, the first connection portion 12511 may be a connection post, and the second connection portion 12531 may be a collar, where the collar is sleeved outside the connection post to movably connect the first operation member 1253 with the driving wheel 1251. When the first operating member 1253 is pushed, the first operating member 1253 rotates the driving wheel 1251 around the first rotation shaft 1258.

Referring to fig. 9, 10 and 12, in this embodiment, the lock release mechanism 125 further includes a first mount 1256. The first mount 1256 is connected to the first push frame 121 and has a receiving chamber 12561. Specifically, the first mount 1256 is mounted at a mounting opening of the hand lever 1213, the first mount 1256 having a third opening 12564 extending through a top wall of the receiving chamber 12561, the receiving chamber 12561 being communicable with the cavity 1214 of the hand lever 1213 through the third opening 12564 and the mounting opening. Further, the first mount 1256 also has a first opening 12562 extending through a bottom wall of the receiving chamber 12561. The first operating member 1253 is accommodated in the accommodation chamber 12561, and the second connecting portion 12531 of the first operating member 1253 is connected to the first connecting portion 12511 of the driving wheel 1251 through the third opening 12564 and the mounting opening. When the first operating member 1253 is in the first locking position, at least a portion of the first operating member 1253 protrudes out of the accommodating chamber 12561 through the first opening 12562 (see fig. 8 and 9). In this way, the user can control the rotation of the driving wheel 1251 by pushing the portion of the first operating member 1253 protruding from the accommodation chamber 12561, thereby realizing the release of the lock.

Referring to fig. 6, in one embodiment, the release mechanism 125 further includes a second reset member 1259. The second reset member 1259 abuts against the locking member 1241 for driving the locking member 1241 to reset, so that the locking member 1241 is maintained in the locked state.

Referring to fig. 8-12, in one embodiment, the locking mechanism 124 further includes a second operating member 1254. The second operating member 1254 is pivotally connected to the vehicle handle frame 120 and has a lock portion 12542 and an operating portion 12541 that can be operated. The second operating member 1254 is pivotable between a second locked position and a second unlocked position. When the second operating member 1254 is located at the second locking position, the locking portion 12542 is located on the movement path of the first operating member 1253 to restrict the movement of the first operating member 1253. When the second operating member 1254 is located at the first unlocking position, the locking portion 12542 is deviated from the moving path of the first operating member 1253 to allow the first operating member 1253 to move. In this way, the user can be prevented from erroneously touching the first operating member 1253, thereby preventing the frame body 100 from being folded.

Specifically, in the present embodiment, as shown in fig. 9 and 10, the first mount 1256 also has a second opening 12563 through a side wall of the accommodation chamber. The locking portion 12542 of the second operating member 1254 is accommodated in the accommodation chamber 12561, and at least a part of the operating portion 12541 protrudes out of the accommodation chamber 12561 through the second opening 12563 at least when the second operating member 1254 is in the second locking position. More specifically, the second operating member 1254 is pivotally connected to the first mounting base 1256 by a second pivot shaft 1260 (see fig. 12), and the pivot point is located between the locking portion 12542 and the operating portion 12541, so that the second operating member 1254 is substantially in a "see-saw" configuration (see fig. 9 and 10) when pivoted on the first mounting base 1256, and the locking portion 12542 is tilted and deviated from the movement path of the first operating member 1253 when the operating portion 12541 is pressed.

Referring to fig. 9, 10 and 12, in one embodiment, the lock release mechanism 125 further includes a first reset member 1255. The first return member 1255 abuts against the second operating member 1254 and is configured to bias the operating portion 12541 to pivot the second operating member 1254 constantly toward the second locking position. Specifically, the first reset member 1255 is accommodated in the accommodation chamber 12561, and one end thereof abuts against the second operation member 1254, specifically against the operation portion 12541, and the other end thereof abuts against the second mount 1257. Thus, when the user needs to unlock the first push frame 121 and the second push frame 122, the locking portion 12542 may tilt and shift the moving path of the first operating member 1253 by pressing the operating portion 12541 of the second operating member 1254, and then press the first operating member 1253 upward so as to push the driving wheel 1251 to rotate, and the locking member 1241 is moved out of the locking recess 1242 under the driving of the pulling member 1252. At this time, the user can rotate the first push frame 121 at will.

Referring to fig. 3 and 4, and fig. 13 and 14, in one embodiment, the seat assembly 200 may include a seat portion 210 and a backrest portion 220, where the seat portion 210 and the backrest portion 220 are pivotally connected to each other and form a first pivot point A1 (or a first pivot axis), and the seat portion 210 is pivotally connected to the frame body 100 and forms a second pivot point A2 (or a second pivot axis). Specifically, the seat portion 210 may be pivoted with the first pivot seat 130 on the frame body 100 and form a second pivot axis A2, and the second pivot axis A2 may be collinear with or parallel to the fourth pivot axis A4. More specifically, in the present embodiment, the second pivot axis A2 is disposed in line with the fourth pivot axis A4. When the backrest 220 is disposed at an angle to the seat 210 for seating a child, the seat 210 is configured to support the lower body (buttocks) of the child and the backrest 220 is configured to support the upper body (back) of the child. More specifically, the seat portion 210 includes a seat tube 211 and a seat plate 212, the seat tube 211 being pivotally coupled to the frame body 100 and forming a second pivot point A2, the seat plate 212 being mounted to the seat tube 211 to support the buttocks of the child.

Further, in one embodiment, the seat assembly 200 may also include a flexible cloth cover (not shown), which may be single-layered or multi-layered. When the flexible cloth cover is a multi-layer structure, a buffer material such as cotton, foam, etc. is provided between each two layers. Thus, when the flexible cloth cover is sleeved outside the seat portion 210 and the backrest portion 220, it can not only enhance the appearance of the seat assembly 200, but also enhance the comfort of a child sitting thereon. In one embodiment, a retraction strap (not shown) is also provided on the handlebar 120. Specifically, two ends of the convergence belt are respectively connected to the second support rods 1221 located at the left and right sides, and the convergence belt is used to bind one end of the middle part or the middle part of the backrest 220, which is far from the first pivot point A1. In this way, the backrest 220 may be supported, and the back may rest on the backrest 220 when a child sits on the seat plate, to improve riding comfort. Further, the length of the converging belt is adjustable. In this way, the user can indirectly adjust the tilt angle of the back portion 220 relative to the seat portion 210 by adjusting the length of the cinching strap.

In this embodiment, the flexible cloth cover sleeved outside the backrest 220 is connected to the second pushing frame 122, and the tightening strap is connected to the second supporting rods 1221 on both sides after passing through the flexible cloth cover, in other words, the area outside the end of the tightening strap is penetrated inside the flexible cloth cover and is located behind the backrest 220.

Unless specifically stated and limited otherwise, the terms of orientation such as "front", "rear", etc. of the stroller in the various embodiments of the present invention are based on the "front", "rear" orientation of the stroller when the stroller is normally traveling, and the "front", "rear" directions are schematically shown by arrows B, P in the drawings. These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

Referring to fig. 3, 4, 13 and 14, in one embodiment, the folding mechanism 300 includes a driving assembly 310 and a linkage 320. The driving assembly 310 is pivotally connected between the handlebar 120 and the wheel frame 110, and the link member 320 is pivotally connected to the driving assembly 310 and the seat portion 210, respectively. When the frame body 100 is switched from the unfolded state to the folded state (see fig. 13 to 19), the driving assembly 310 pivots relative to the wheel frame 110 or the handlebar 120 and drives the first pivot point A1 of the seat portion 210 to rotate upward about the second pivot point A2 along the first direction W through the link 320, thereby driving the seat assembly 200 to fold.

Referring to fig. 13 and 14, in one embodiment, the drive assembly 310 includes a drive member 311 and a rotating member 312. The driving member 311 is pivotally connected between the handlebar 120 and the rear wheel frame 112, and the rotating member 312 has one end pivotally connected to the front wheel frame 111 and the other end pivotally connected to the driving member 311 at a first rotation point B1 (or a first rotation axis). When the frame body 100 is in the unfolded state, the first rotation point B1 and the transmission member 313 of the driving assembly 310 are both located between the front wheel frame 111 and the rear wheel frame 112. In this way, when the driving piece 311 pivots with respect to the rear wheel frame 112, the first rotation point B1 is displaced in the first direction F1, and drives the rotation piece 312 to rotate with respect to the front wheel frame 111, thereby pivoting the front wheel frame 111 with respect to the rear wheel frame 112. Further, the first end of the linkage member 320 is pivotally connected to the seat portion 210, and the second end is pivotally connected to the driving member 311. Thus, when the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 simultaneously drives the linkage member 320 to move relative to the wheel frame 110 to pull or push the seat portion 210, so that the first pivot point A1 of the seat portion 210 can rotate about the second pivot point A2. Specifically, the linkage 320 and the seat portion 210 are pivoted to the third pivot point A3 (or the third pivot axis), and the third pivot point A3 is located at a side of the second pivot point A2 near the first pivot point A1. In this way, when the driving member 311 rotates around the second rotation point B2 in the counterclockwise direction, the linkage member 320 can move upward along the first direction F1 relative to the wheel frame 110 (i.e., the third pivot point A3 can be displaced upward along the first direction F1), so that the third pivot point A3 can rotate around the second pivot point A2 in the first direction W (i.e., the seat portion 210 can rotate around the second pivot point A2 in the clockwise direction), thereby folding the seat portion 210. More specifically, in the present embodiment, the third pivot point A3 is disposed coaxially with the first pivot point A1. In this way, the moment arm can be increased, making the seat portion 210 and the back portion 220 easier to fold (see below for a specific folding process).

Further, as shown in fig. 4,5 and 7, the driving assembly 310 further includes a transmission member 313, and the transmission member 313 is disposed on the driving member 311. The first end of the linkage member 320 is pivotally connected to the seat portion 210, and the other end of the linkage member 320 is pivotally connected to the transmission member 313, that is, the second end of the linkage member 320 is pivotally connected to the driving member 311 through the transmission member 313. When the frame body 100 is in the unfolded state, the transmission member 313 is located between the front wheel frame 111 and the rear wheel frame 112. Referring to fig. 13 and 14, in an embodiment, the driving member 311 is pivoted to the rear wheel frame 112 and forms a second rotation point B2 (or a second rotation axis) on the rear wheel frame 112, and one end of the rotation member 312 is pivoted to the front wheel frame 111 and forms a third rotation point B3 (or a third rotation axis) on the front wheel frame 111. When the frame body 100 is in the unfolded state, the first rotation point B1 and the transmission member 313 are both located between the second rotation point B2 and the third rotation point B3. When the driving member 311 pivots about the second pivot point B2, the driving member 311 drives the rotating member 312 to rotate about the third pivot point B3 through the first pivot point B1, and simultaneously drives the driving member 313 to rotate about the second pivot point B2, so as to drive the linkage member 320 to integrally move relative to the frame body 100, thereby rotating the first pivot point A1 of the seat portion 210 about the second pivot point A2.

In other embodiments, not shown, the driving assembly 310 includes a driving member 311 and a transmission member 313, wherein the driving member 311 is pivotally connected between the handlebar 120 and the wheel frame 110, and the transmission member 313 is disposed on the driving member 311. The second end of the linkage 320 is pivotally connected to the transmission member 313, and the first end of the linkage 320 is pivotally connected to the seat portion 210. When the frame body 100 is switched from the unfolded state to the folded state, the driving member 311 drives the driving member 313 to pivot relative to the wheel frame 110, and the driving member 313 drives the linkage member 320 to move, so that the first pivot point A1 of the seat portion 210 rotates upwards along the first direction W around the second pivot point A2. The transmission member 313 is pivotally connected to the front wheel frame 111 of the wheel frame 110, and the rotation member 312 may not be disposed between the transmission member 313 and the rear wheel frame 112. When the frame body 100 is switched from the unfolded state to the folded state, the rear wheel frame 112 may be driven by other driving structures to pivot relative to the front wheel frame 111, which is not limited by the present application.

Referring to fig. 1 and 13, in the present embodiment, the driving member 311 is pivotally connected between the first push frame 121 and the rear wheel frame 112. Specifically, the end of the first pushing frame 121 near the second pushing frame 122 has a pushing portion 1211. The driving member 311 is pivotally connected between the pushing portion 1211 and the rear wheel frame 112, and forms a fourth rotation point B4 (or a fourth rotation axis) on the pushing portion 1211. In this way, the fourth pivot point B4, the second pivot point B2, the fourth pivot point A4, and the fifth pivot point A5 are connected to form a four-bar linkage. With this four-bar linkage structure, the frame body 100 can be switched between an extended state and a collapsed state. Meanwhile, when the frame body 100 is switched between the unfolded state and the folded state, the unfolding and folding of the seat assembly 200 can be achieved through the driving member 311, the transmission member 313, the linkage member 320, and the like.

It should be noted that, the lever of the "four-bar structure" mainly includes the second pushing frame 122, the pushing portion 1211, the driving member 311, and a portion of the frame body of the rear wheel frame 112. Specifically, when the first pushing frame 121 and the second pushing frame 122 are bent around the fifth pivot point A5, the pushing portion 1211 pushes the driving member 311 to rotate around the second pivot point B2 in the counterclockwise direction, and at the same time, the second pushing frame 122 can also rotate around the fourth pivot point A4 relative to the first pivot seat 130 in the counterclockwise direction, so that the second pushing frame 122 gradually approaches the rear wheel frame 112, and the folding of the frame body 100 is completed.

Specifically, as shown in fig. 13 to 16, the transmission member 313 is disposed on the driving member 311, and when the first push frame 121 is folded relative to the second push frame 122 to fold the handle 120, the driving member 311 is driven by the pushing portion 1211 to rotate in a counterclockwise direction about the second rotation point B2, and during this rotation, the first rotation point B1 is displaced upward in the first direction F1, so that the rotation member 312 rotates in a clockwise direction about the first rotation point B3, and simultaneously drives the transmission member 313 to rotate in a counterclockwise direction about the second rotation point B2. Thus, the link 320 moves upward in the first direction F1 with respect to the entire frame body 100. Therefore, the first pivot point A1 of the seat portion 210 will rotate upward along the first direction W about the second pivot point A2, which is equivalent to rotating the seat portion 210 clockwise about the second pivot point A2. Meanwhile, as the first push frame 121 is bent with respect to the second push frame 122, the second push frame 122 rotates around the first pivot 130 in a counterclockwise direction to approach the rear wheel frame 122 as described above. Since the backrest 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122 drives the backrest 220 to rotate around the first pivot point A1 in the counterclockwise direction when approaching the rear wheel frame 122. It can be seen that, during the folding process of the frame body 100, under the cooperation of the driving member 311, the transmission member 313 and the linkage member 320, both the backrest 220 and the seat 210 can be respectively folded downward about the first pivot point A1 (i.e. the backrest 220 rotates about the first pivot axis A1 in the counterclockwise direction, and the seat 210 rotates about the first pivot axis A1 in the clockwise direction). Because the first pivot point A1 can be gradually far away from the ground in the bending process, the loose flexible cloth sleeve at the first pivot point A1 is not easy to contact with the ground, and therefore the possibility of abrasion is reduced. As shown in fig. 17 to 19, since the seat portion 210 is located at the outermost side (front-most end) in the front-rear direction of the stroller 1000 when the seat assembly 200 is folded, the possibility of interference between the seat portion 210 and other structures (such as the handle 120) during the unfolding and folding of the seat assembly 200 can be avoided, and thus the overall folding smoothness of the stroller 1000 can be improved, despite the large size of the seat portion 210. In addition, when the seat portion 210 is located at the outermost side, the flexible cloth cover stacked at the pivot joint of the seat portion and the backrest portion 220 can be prevented from being propped against other structures, so that the volume of the foldable stroller 1000 of the present application can be smaller.

Alternatively, in other alternative embodiments, during the linkage 320 pushing the first pivot point A1 to rotate clockwise around the second pivot point A2, even if the backrest 220 is not rotated around the first pivot point A1 by the flexible cloth cover, the end of the backrest 220 away from the first pivot point A1 still rotates around the counterclockwise direction relative to the first pivot point A1 under the action of gravity.

In one embodiment, the transmission member 313 is disposed at an angle to the driving member 311. The transmission member 313 is disposed on a side of the driving member 311 facing away from the seat assembly 200. In this way, the radius of rotation of the linkage 320 relative to the second rotation point B2 may be increased to increase the distance the linkage 320 moves upward in the first direction F1, thereby ensuring that the seat assembly 200 is fully collapsed.

Fig. 13 to 19 show a folding process of the frame body 100 when the transmission member 313 is provided on the driving member 311. The frame body 100 in fig. 13 and 14 is in an unfolded state, the frame body 100 in fig. 15 and 16 is in a first transition state between an unfolded state and a folded state, the frame body 100 in fig. 17 and 18 is in a second transition state between an unfolded state and a folded state, and the frame body 100 in fig. 19 is in a folded state. Thus, when it is necessary to fold the frame body 100 in the present embodiment, the second operating member 1254 and the first operating member 1253 are operated (e.g., pressed) first to put the locking mechanism 124 in the unlocked state. Subsequently, the first pushing frame 121 is rotated around the second pivot base 123 (the fifth pivot point A5) to fold up relative to the second pushing frame 122. During the rotation, the pushing portion 1211 of the first pushing frame 121 pushes the driving member 311 downward, so that the driving member 311 rotates downward along the first rotation direction W about the second rotation point B2, that is, equivalently, the driving member 311 rotates counterclockwise about the second rotation point B2. In the process of rotating around the second rotation point B2, the driving member 311 drives the first rotation point B1 and one end of the rotation member 312 pivoted to the driving member 311 to displace upwards along the first direction F1, so that the rotation member 312 rotates clockwise relative to the third rotation point B3, and further the distance between the second rotation point B2 and the third rotation point B3 is changed, so that the front wheel frame 111 pivots relative to the rear wheel frame 112. In addition, the driving member 311 drives the driving member 313 to rotate around the second pivot point B2 in the counterclockwise direction, so that the driving member 320 pivots relative to the driving member 313 and moves upwards in the first direction F1, and the movement pushes the first pivot point A1 to rotate around the second pivot point A2 in the clockwise direction, so that the seat portion 210 is folded. Meanwhile, when the first pushing frame 121 rotates relative to the second pushing frame 122 to push the driving member 311 downward by the pushing portion 1211, the second pushing frame 122 rotates about the first pivot seat 130 (the fourth pivot point A4) and gradually moves toward the rear wheel frame 112 until the frame body 100 is folded to the folded state of fig. 19. In the process that the second handle 122 gradually approaches the rear wheel frame 112, the backrest 220 is driven by the second handle 122 and the flexible cloth cover connected thereto to rotate counterclockwise relative to the first pivot point A1, so that the backrest 220 is folded. In the folding process of the frame body 100, under the cooperation of the driving member 311, the driving member 313, the linkage member 320, and the like, the backrest 220 and the seat 210 can be respectively folded downward around the first pivot point A1, so as to complete folding of the seat assembly 200 and the backrest 220.

Referring to fig. 14 and 16, in one embodiment, the driving member 311 includes a first driving section 3111 and a second driving section 3112 that are connected. The first driving section 3111 is pivotally connected to the handlebar 120, specifically, the first driving section 3111 is pivotally connected to the pushing portion 1211 of the first handlebar 121 (see fig. 13), the second driving section 3112 is pivotally connected to the rear wheel frame 112 at a second rotation point B2, and the second driving section 3112 is pivotally connected to the rotating member 312 at the first rotation point B1. The transmission member 313 is connected to the second drive section 3112 and is disposed at an angle to the second drive section 3112. Specifically, the first driving section 3111 and the second driving section 3112 are disposed at an angle, and a first angle α1 is formed therebetween. And at least when the frame body 100 is in the unfolded state, the opening of the first included angle α1 between the first driving section 3111 and the second driving section 3112 is disposed upward along the first direction F1. Specifically, the first angle α1 between the first driving section 3111 and the second driving section 3112 is an obtuse angle. When the frame body 100 is in the unfolded state, the opening of the first included angle α1 is disposed obliquely upward along the first direction F1. In this way, when the second driving section 3112 moves upward (i.e., when the second driving section 3112 rotates in the counterclockwise direction about the second rotation point B2), the first rotation point B1 can be more easily driven to move upward, and the front wheel frame 111 can be quickly brought close relative to the rear wheel frame 112. Of course, in another alternative embodiment, the first angle α1 between the first driving section 3111 and the second driving section 3112 may be a right angle or an acute angle, which may be specifically set according to practical requirements. It should be noted that the first driving section 3111 and the second driving section 3112 may be fixedly connected (e.g. integrally formed) or detachably connected (e.g. screwed or clamped). The present application is not particularly limited in this regard.

Referring to fig. 14 and 16, in one embodiment, at least a portion of the transmission member 313 is located on a side of the second drive segment 3112 facing away from the opening of the first included angle α1. In this way, the length of the linkage member 320 is increased, the stress direction at the pivot point (i.e. A6) between the linkage member 320 and the transmission member 313 is changed when the driving member 311 rotates, the rotating force arm of the linkage member 320 is increased, so that the rotation process of the seat portion 210 around the second pivot point A2 is smoother, and the pivot point (i.e. A6) between the linkage member 320 and the transmission member 313 is eccentric relative to the second pivot point B2, i.e. the pivot point A6 is arranged outside the straight line where the first pivot point B1 and the second pivot point B2 are located, so that the rotation radius of the linkage member 320 when rotating relative to the second pivot point B2 is increased, the distance when the linkage member 320 moves upwards approximately along the first direction F1 is increased, so that the seat assembly 200 is ensured to be fully folded, and the folding reliability is improved. In some embodiments, the transmission member 313 may be fixedly connected to the second driving section 3112, e.g., the transmission member 313 may be integrally formed with the second driving section 3112. Of course, in other alternative embodiments, the transmission 313 may be removably coupled to the second drive segment 3112, e.g., the transmission 313 may be coupled to the second drive segment 3112 by fasteners such as screws. The present application is not particularly limited in this regard.

Referring to fig. 16 and 18, in some embodiments, the transmission member 313 includes a first segment 3131 and a second segment 3132 connected to each other, and a second angle α2 is formed between the first segment 3131 and the second segment 3132. The first segment 3131 is disposed on the driving member 311 in a stacked manner and located between the first rotation point B1 and the second rotation point B2, the second segment 3132 is pivotally connected to the linkage member 320, and the opening of the second included angle α2 is disposed downward along the first direction F1 at least when the frame body 100 is in the unfolded state. Specifically, the first segment 3131 is stacked and fixedly connected to the second driving segment 3112, and the opening of the second included angle α2 faces away from the opening of the first included angle α1. More specifically, the linkage 320 is pivotally connected to an end of the second segment 3132 remote from the first segment 3131. In this way, when the transmission member 313 rotates along with the driving member 311 around the second rotation point B2, the linkage member 320 can be more easily driven to move upwards or downwards along the first direction F1, so as to drive the seat assembly 200 to fold in a correct direction, thereby avoiding the "jamming" phenomenon.

With the frame body 100, the seat assembly 200, and the stowing mechanism 300 described above in mind, the principles of use of the stroller 1000 will be described in detail below with reference to fig. 13-19.

Referring to fig. 13 and 14, when the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state (see fig. 6), the first and second push brackets 121 and 122 remain relatively fixed, that is, the pushing portion 1211 also remains relatively fixed. Since the second push frame 122, the pushing portion 1211, the driving piece 311, and the rear wheel frame 112 constitute a four-bar linkage structure, when the first push frame 121 and the second push frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and cannot pivot, so that the second push frame 122, the driving piece 311, and the rear wheel frame 112 remain fixed relative to each other and cannot rotate, and finally the frame body 100 can be stably maintained in the unfolded state. Meanwhile, since the driving piece 311 is fixed, the driving piece 313 and the linkage piece 320 are fixed, and thus the seat part 210 can be stably supported on the first pivot seat 130. In addition, when the frame body 100 is in the unfolded state, the front wheel frame 111 and the rear wheel frame 112 are disposed at an angle, the rotating member 312 and the second driving section 3112 are located on the same horizontal plane, and the front wheel frame 111, the rear wheel frame 112 and part of the structures (e.g. the second driving section 3112 and the rotating member 312) of the driving assembly 310 can be integrally regarded as a triangle structure, so that the front wheel frame 111 and the rear wheel frame 112 can be kept relatively fixed, so that the frame body 100 can be stably kept in the unfolded state.

Referring to fig. 13 to 19, when a user needs to switch the frame body 100 from the unfolded state (see fig. 13 and 14) to the folded state (see fig. 18 and 19), pressing the lock release mechanism 125 switches the lock mechanism 124 to the lock release state. Specifically, the operation portion 12541 of the second operation member 1254 is pressed first, so that the locking portion 12542 deviates from the moving path of the first operation member 1253, and then the driving wheel 1251 is pushed to rotate by pressing the first operation member 1253, so that the traction member 1252 can be driven to move to pull the locking member 1241 to retract from the locking recess 1242. Subsequently, the first pushing frame 121 is rotated about the second pivot base 123 (the fifth pivot point A5) in the clockwise direction to fold up relative to the second pushing frame 122. During the rotation, the pushing portion 1211 of the first pushing frame 121 pushes the first driving section 3111 of the driving member 311 downward, so that the driving member 311 rotates in the counterclockwise direction around the second rotation point B2 as a whole. At this time, the first driving section 3111 of the driving member 311 rotates downward around the second rotation point B2, and the second driving section 3112 of the driving member 311 rotates upward around the second rotation point B2. As the second driving section 3112 rotates, the first rotation point B1 connected thereto moves upward. When the first rotation point B1 moves upward, it drives the rotator 312 to move upward, so that the rotator 312 pivots in a clockwise direction about the third rotation point B3. In this way, the distance between the second rotation point B2 and the third rotation point B3 is reduced, so that the front wheel frame 111 and the rear wheel frame 112 are close to each other, and the folding of the frame body 100 is achieved. In addition, during the rotation, the second driving section 3112 further drives the transmission member 313 to rotate around the counterclockwise direction relative to the second rotation point B2, so that the driving linkage member 320 pivots relative to the transmission member 313 and moves upwards in the first direction F1, and the movement drives the first pivot point A1 to rotate around the second pivot point A2 in the clockwise direction, so as to drive the seat portion 210 to fold. Since the second handle frame 122 rotates around the first pivot 130 to approach the rear wheel frame 122 in the counterclockwise direction during the folding process of the handle frame 120, and the backrest 220 is connected with the second handle frame 122 through the flexible cloth cover, the second handle frame 122 drives the backrest 220 to rotate around the first pivot point A1 in the counterclockwise direction during the approaching process of the rear wheel frame 122, and thus, folding of the backrest 220 is achieved.

Of course, when the user needs to switch the frame body 100 from the folded state to the unfolded state, the first pushing frame 121 is directly rotated around the second pivot seat 123 (the fifth pivot point A5) in the counterclockwise direction until the first pushing frame 121 and the second pushing frame 122 are in the same plane. During the rotation, the pushing portion 1211 of the first pushing frame 121 pulls the first driving section 3111 of the driving member 311 upward, so that the driving member 311 rotates in the clockwise direction about the second rotation point B2 as a whole. At this time, the first driving section 3111 of the driving member 311 rotates upward around the second rotation point B2, and the second driving section 3112 of the driving member 311 rotates downward around the second rotation point B2. As the second driving section 3112 rotates, the first rotation point B1 connected thereto moves downward. When the first rotation point B1 moves downward, it drives the rotation member 312 to move downward, so that the rotation member 312 pivots in the counterclockwise direction about the third rotation point B3. In this way, this process increases the distance between the second rotation point B2 and the third rotation point B3, thereby moving the front wheel frame 111 and the rear wheel frame 112 away from each other, and thus achieving the deployment of the frame body 100. In addition, during rotation, the second driving section 3112 further drives the transmission member 313 to rotate clockwise relative to the second pivot point B2, and during rotation, the transmission member 313 moves generally downward in the first direction F1, such that the linkage member 320 pivots relative to the transmission member 313 and moves generally downward along the first direction F1 along with the transmission member 313, and thus, the third pivot point of the seat portion 210 is pulled to move downward, such that the seat portion 210 rotates counterclockwise about the second pivot point A2, and finally the seat portion 210 is unfolded. Since the second handle frame 122 rotates around the first pivot 130 in the clockwise direction to be far away from the rear wheel frame 122 during the unfolding process of the handle frame 120, and the backrest 220 is connected with the second handle frame 122 through the flexible cloth cover, the second handle frame 122 drives the backrest 220 to rotate around the first pivot point A1 in the clockwise direction during the unfolding process of the rear wheel frame 122, so that the unfolding of the backrest 220 is realized.

As can be seen from the above description, in the stroller 1000 of the present application, the seat portion 210 and the backrest portion 220 are pivoted to each other to form the first pivot point A1, and the seat portion 210 is pivoted to the first pivot seat 130 to form the second pivot point A2, the driving component 310 of the folding mechanism 300 is pivoted between the handlebar 120 and the wheel frame 110, and the linkage 320 is pivoted to the driving component 310 and the seat portion 210, respectively, and in addition, when the frame body 100 is switched from the unfolded state to the folded state, the driving component 310 can pivot relative to the wheel frame 110 or the handlebar 120 and drive the first pivot point A1 of the seat portion 210 to rotate upwards around the second pivot point A2 through the linkage 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the stroller frame 120 is only required to pivot with respect to the wheel frame 110, and the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2 under the cooperation of the driving assembly 310 and the linkage 320, i.e. the first pivot point A1 moves away from the ground. In addition, the backrest 220 may be rotated in a counterclockwise direction about the first pivot point A1 to move in a direction approaching the ground by the second push frame and the flexible cloth cover. In other words, when the frame body 100 is folded, the backrest 220 and the seat 210 can be bent downward around the first pivot point A1 under the driving and linkage actions of the folding mechanism 300, so that the loose flexible cloth cover at the first pivot point A1 is not easy to contact with the ground, thereby reducing the possibility of abrasion. Meanwhile, since the driving assembly 310 in the present application includes the driving member 313, the driving member 313 is disposed between the first rotation point B1 and the second rotation point B2 on the driving member 311 and is located at a side of the driving member 311 away from the included angle α1, when the driving member 320 is pivoted between the driving member 313 and the seat portion 210, and when the frame body 100 is folded, the protruding driving member 313 increases the length of the driving member 320, and changes the force direction at the pivot point A6 of the driving member 311 and the driving member 313 when the driving member 311 rotates, so as to increase the rotation arm, and make the rotation process of the seat portion 210 around the second pivot point A2 smoother. In addition, the protruding transmission member 313 further increases the radius of the linkage member 320 when rotating relative to the second rotation point B2, so that the distance that the linkage member 320 moves upwards in the first direction F1 increases, thereby ensuring that the seat assembly 200 can be fully folded, and improving the reliability of folding the seat assembly 200. Further, since the linkage 320 is pivotally connected between the transmission member 313 and the seat portion 210, when the transmission member 313 drives the linkage 320 to rotate so that the linkage 320 moves upwards or downwards in the first direction F1, the linkage can provide a degree of freedom for the relative movement between the driving member 311 and the seat portion 210, so that the driving member 311 can drive the seat portion 210 to pivot when rotating.

Alternatively, in other alternative embodiments, the first end of the linkage 320 is pivotally coupled to the seat portion 210 and the second end is pivotally coupled to the rotator 312. Specifically, the transmission member 313 is disposed at an angle to the rotation member 312, and is located on a side of the rotation member 312 facing away from the seat assembly 200. When the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 drives the first rotating point B1 to displace in the first direction F1, and simultaneously drives the rotating member 312 to rotate relative to the front wheel frame 111. Thus, when the second end of the linkage member 320 is pivotally connected to the rotating member 312, the linkage member 320 can still push the seat portion 210 to rotate about the second pivot axis A2. Further, the transmission member 313 is disposed on the rotation member 312, and the first end of the linkage member 320 is pivotally connected to the seat portion 210, and the second end of the linkage member 320 is pivotally connected to the transmission member 313, i.e. the second end of the linkage member 320 is pivotally connected to the rotation member 312 through the transmission member 313. Specifically, when the frame body 100 is in the unfolded state, the transmission member 313 is located between the front wheel frame 111 and the rear wheel frame 112 and between the first rotation point B1 and the third rotation point B3.

When the frame body 100 is switched from the unfolded state to the folded state, that is, when the first push frame 121 is folded relative to the second push frame 122 to fold the handlebar frame 120, the driving member 311 is driven by the pushing portion 1211 to rotate around the second rotation point B2 in the counterclockwise direction, and during this rotation, the first rotation point B1 is displaced upward along the first direction F1, so that the rotation member 312 rotates around the third rotation point B3 in the clockwise direction, and the transmission member 313 also rotates around the third rotation point B3 in the clockwise direction. Thus, the link 320 moves upward in the first direction F1 with respect to the entire frame body 100. Therefore, the first pivot point A1 of the seat portion 210 rotates upward along the first direction W about the second pivot point A2, which is equivalent to rotating the seat portion 210 clockwise about the second pivot point A2, so as to fold the seat portion 210. When the frame body 100 is switched from the folded state to the unfolded state, that is, when the first push frame 121 is folded relative to the second push frame 122 to unfold the handlebar frame 120, the driving member 311 is driven by the pushing portion 1211 to rotate clockwise about the second rotation point B2, and during this rotation, the first rotation point B1 is displaced downward along the first direction F1, so that the rotation member 312 rotates counterclockwise about the third rotation point B3, and the transmission member 313 also rotates counterclockwise about the third rotation point B3. Thus, the link 320 moves downward in the first direction F1 with respect to the entire frame body 100. Therefore, the first pivot point A1 of the seat portion 210 rotates downward along the first direction W about the second pivot point A2, which is equivalent to rotating the seat portion 210 counterclockwise about the second pivot point A2, so as to realize the unfolding of the seat portion 210. It can be seen that when the transmission member 313 is disposed on the rotation member 312, the seat assembly 200 can be folded or unfolded with the frame body 100 as well. It should be noted that the folding and unfolding process of the backrest 220 in this embodiment is substantially the same as the folding and unfolding process of the backrest 220 when the transmission member 313 is disposed on the driving member 311, and will not be described herein.

In the foregoing child stroller 1000, since the wheel frame 110 and the handlebar 120 in the frame body 100 are pivoted to each other, the frame body 100 is provided with both the unfolded and folded states and can be switched between the two states. Further, since the seat portion 210 and the backrest portion 220 of the seat assembly 200 are pivotally connected to each other to form a first pivot point A1, and the seat portion 210 is pivotally connected to the frame body 100 (e.g., the first pivot 130) to form a second pivot point A2, the driving assembly 310 of the folding mechanism 300 is pivotally connected between the handlebar 120 and the wheel frame 110, and the linkage 320 of the folding mechanism 300 is pivotally connected to the driving assembly 310 and the seat portion 210, respectively, and further, when the frame body 100 is switched from the unfolded state to the folded state, the driving assembly 310 can pivot relative to the wheel frame 110 or the handlebar 120 and drive the first pivot point A1 of the seat portion 210 to rotate upward around the second pivot point A2 via the linkage 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the handlebar 120 is only required to pivot with respect to the wheel frame 100, and under the cooperation of the driving assembly 310 and the linkage 320, the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2, i.e. the first pivot point A1 moves away from the ground, so as to fold the seat portion 210. Because the handlebar 120 gradually approaches the ground when the frame body 100 is folded, and the backrest 220 is connected to the handlebar 120 through the flexible cloth cover, the frame body 100 moves the backrest 220 downward around the first pivot point A1 under the joint action of the flexible cloth cover during the folding process, that is, moves the end of the backrest 220 away from the first pivot point A1 in the direction approaching the ground, so that the folding of the backrest 220 can be realized. It can be seen that, during the folding process of the frame body 100, both the backrest 220 and the seat 210 are respectively bent downward around the first pivot point A1, so that the loose flexible cloth cover at the first pivot point A1 is not easy to contact with the ground, thereby reducing the possibility of abrasion of the flexible cloth cover. In addition, since the seat portion 210 is located at the outermost side (e.g., the forefront) in the front-rear direction of the stroller 1000 after the seat assembly 200 is folded (see fig. 19), the possibility of interference between the seat portion 210 and other structures (e.g., the stroller 120) during the unfolding and folding of the seat assembly 200 can be avoided, thereby improving the overall folding smoothness of the stroller 1000, although the seat portion 210 has a larger size. In addition, when the seat portion 210 is located at the outermost side, the flexible cloth cover stacked at the pivot joint of the seat portion and the backrest portion 220 can be prevented from being propped against other structures, so that the volume of the foldable stroller 1000 of the present application can be smaller.

According to the child stroller provided by the embodiment of the application, loose cloth covers can be effectively prevented from being contacted with the ground when the child stroller is folded.

In the child stroller according to the present application, since the wheel frame and the handlebar frame in the frame body are pivoted to each other, the frame body is made to have both an unfolded and a folded state, and can be switched between the two. Furthermore, when the frame body is switched from the unfolded state to the folded state, the driving assembly can pivot relative to the wheel frame or the vehicle hand frame and drive the first pivot point of the seat part to rotate upwards around the second pivot point through the linkage. Therefore, when the stroller is placed on the ground and needs to be folded, the stroller frame only needs to pivot relative to the wheel frame, and under the cooperation of the driving assembly and the linkage piece, the first pivot point of the seat part can rotate upwards around the second pivot point, namely, the first pivot point moves towards the direction away from the ground to realize the folding of the seat, and in addition, in the process, one end of the backrest part away from the first pivot point moves towards the direction close to the ground. In other words, during the process of pivoting the seat part around the second pivot point, the backrest part and the seat part are respectively bent downwards around the first pivot point, so that the loose flexible cloth cover at the first pivot point is not easy to contact with the ground, and the possibility of abrasion is reduced.

Fig. 21 and 22 show a stroller 1000 according to another embodiment of the present application, where the stroller 1000 is substantially symmetrical in structure. The stroller 1000 can include, for example, a frame body 100, a basket bar assembly 500, and a folding mechanism 300. Wherein the frame body 100 includes a wheel frame 110 and a handle frame 120, the handle frame 120 and the wheel frame 110 are pivotally connected to each other so that the frame body 100 can be switched between an unfolded state (see fig. 21 and 22) and a folded state (fig. 32 and 33). The basket bar assembly 500 is pivotally coupled to the wheel frame 110 and has an extended state (see fig. 21 and 22) and a collapsed state (fig. 32 and 33).

As shown in fig. 23 and 25, the folding mechanism 300 includes a driving assembly 310 and a linkage member 330. The driving assembly 310 is pivotally connected between the handlebar 120 and the wheel frame 110, and is movably connected to the basket bar assembly 500 through the linkage member 330. Wherein the pivot point of the drive assembly 310 on the wheel frame 110 (specifically, the rear wheel frame 112) may be considered a second pivot point B2 (or second axis of rotation). In the present embodiment, the linkage member 330 is pivotally connected to the basket bar assembly 500 and the driving assembly 310, respectively. When the frame body 100 is switched between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linkage member 330 integrally moves relative to the frame body 100 and pivots relative to the driving assembly 310, thereby driving the basket bar assembly 500 to switch between the unfolded state and the folded state. In another alternative embodiment, the linkage member 330 may be movably connected to the basket bar assembly 500 and movably connected to the driving assembly 310. When the frame body 100 is switched between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linkage member 330 integrally moves relative to the frame body 100 and drives the basket bar assembly 500 to rotate, thereby driving the basket bar assembly 500 to switch between the unfolded state and the folded state.

According to the stroller 1000 and the child carrier provided by the embodiments of the present application, when the stroller 1000 is folded, the driving assembly 310 directly drives the whole linking member 330 to move relative to the frame body 100 by directly folding the frame body 100, so as to drive the basket rod assembly 500 to switch from the extended state to the folded state. Thus, not only the folding convenience of the child stroller 1000 can be improved, but also the folding smoothness of the child stroller 1000 can be improved.

The frame body 100, the basket bar assembly 500, and the folding mechanism 300 will be further described one by one.

Referring to fig. 21 to 23, in an embodiment, the frame body 100 may include a wheel frame 110 and a handle frame 120. Wherein the wheel frame 110 comprises a front wheel frame 111 and a rear wheel frame 112 which are pivotally connected. The handle 120 includes a first push handle 121 and a second push handle 122 pivotally connected.

The front wheel frame 111 has, for example, a U-shaped structure including front bars 1111 on both left and right sides and a front cross bar 1112 connected between the two front bars 1111. The front rail 1112 extends generally along a second direction F2, which second direction F2 corresponds to the left-right direction. At least one front wheel seat 611 is mounted to the bottom of the front wheel frame 111. In the present embodiment, two front wheel seats 611 are mounted at the bottom of the front wheel frame 111, and the two front wheel seats 611 are spaced apart in the left-right direction (i.e., the second direction F2). The structure of the front wheel frame 111 in the present embodiment is the same as that of the front wheel frame 111 in the above-described embodiment, so the foregoing description will be referred to as to the specific structure and connection of the front wheel frame 111, and will not be repeated here.

Referring to fig. 21 to 23, the rear wheel frame 112 has, for example, a U-shaped structure including two rear bars 1121 located at left and right sides and a rear rail 1122 connected between the two rear bars 1121, the rear rail 1122 extending in the second direction F2. At least one rear wheel seat 621 is mounted to the bottom of the rear wheel frame 112. In the present embodiment, two rear wheel seats 621 are mounted at the bottom of the rear wheel frame 112, and the two rear wheel seats 621 are disposed at intervals in the left-right direction (i.e., the second direction F2). The structure of the rear wheel frame 112 in the present embodiment is the same as that of the rear wheel frame 112 in the above-described embodiment, so the foregoing description will be referred to as to the specific structure and connection of the rear wheel frame 112, and will not be repeated here.

Referring to fig. 23 to 25, the frame body 100 further includes a first pivot 130, the first pivot 130 having a fourth pivot point A4, and the front wheel frame 111 and the rear wheel frame 112 are pivotally connected to the fourth pivot point (or fourth pivot axis) A4 through the first pivot 130 such that the front wheel frame 111 is rotatable about the fourth pivot point A4 with respect to the rear wheel frame 112. Specifically, the upper ends of the two rear levers 1121 are pivotally connected to the upper ends of the front levers 1111 on the same side, for example, through the first pivot blocks 130, respectively, that is, the rear levers 1121 on the same side can pivot about the fourth pivot point A4 corresponding to the first pivot blocks 130 with respect to the front levers 1111 on the same side. This allows the volume of the wheel frame 110 to be changed to switch the frame body 100 between the unfolded state and the folded state. More specifically, the first pivot seat 130 includes a first seat 131 and a second seat 132, where the first seat 131 and the second seat 132 are stacked and both pivot coaxially about the fourth pivot point A4. The connection portion of the first housing 131 is connected to the front lever 1111, and the connection portion of the second housing 132 is connected to the rear lever 1121.

Referring to fig. 23 to 25, the handle bar 120 may be pivotally connected to the wheel frame 110, for example, by a first pivot 130, and may rotate about a fourth pivot point A4. Specifically, the first pivot seat 130 further includes a third seat 133. The third base 133 is stacked with the second base 132 and the first base 131, and the three can pivot coaxially around the fourth pivot point A4. The connecting portion of the third seat 133 is connected to the handle bar 120.

Referring to fig. 21 and 22, the handle 120 may further include a second pivot block 123, the second pivot block 123 having a fifth pivot point A5. The first pushing frame 121 and the second pushing frame 122 are pivoted at the fifth pivot point A5 through the second pivot seat 123, that is, the first supporting rod 1212 corresponding to the same side is pivoted with the second supporting rod 1221 located at the same side through the second pivot seat 123, and the first supporting rod 1212 can rotate around the fifth pivot point A5 relative to the second supporting rod 1221. Specifically, the second pivot base 123 includes a fixed base body 1231 and a pivot base body 1232.

The first pivot 130 and the second pivot 123 in this embodiment are identical to the first pivot 130 and the second pivot 123 in the above embodiments, so the specific structure and connection of the first pivot 130 and the second pivot 123 are referred to the foregoing description, and will not be repeated here.

Referring to fig. 26, 28 and 30, in an embodiment, an end portion of the first pushing frame 121 near the second pushing frame 122 has a pushing portion 1211, and the driving assembly 310 is pivotally connected between the pushing portion 1211 and the rear wheel frame 112, and forms a fourth rotation point B4 on the pushing portion 1211. The fourth rotation point B4, the second rotation point B2, the fourth pivot point A4 and the fifth pivot point A5 are connected to form a four-bar structure. In this way, the frame body 100 can be switched between the unfolded state and the folded state by the four-bar linkage structure. It should be noted that, the lever of the "four-bar structure" mainly includes the second pushing frame 122, the pushing portion 1211, the first driving section 3111 of the driving assembly 310, and a portion of the frame body of the rear wheel frame 112.

Referring to fig. 21, 34 and 35, in one embodiment, the frame body 100 further includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is disposed within the second pivot block 123. The lock mechanism 124 has a lock state in which the first push frame 121 and the second push frame 122 are restricted from rotating relative to each other, and a release state in which the first push frame 121 and the second push frame 122 are allowed to rotate relative to each other. The release mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between a locked state and a release state. In the present embodiment, when the frame body 100 is in the unfolded state, the first pushing frame 121 is substantially parallel to the second pushing frame 122, i.e. the first pushing frame 121 and the second pushing frame 122 are on the same plane, and the included angle α3 between the first pushing frame 121 and the second pushing frame 122 is 180 degrees. The locking mechanism 124 is capable of restricting relative rotation of the first and second push racks 121 and 122 to maintain the first and second push racks 121 and 122 in the same plane. When the frame body 100 is in the folded state, the included angle α3 between the first and second push frames 121 and 122 is an acute angle (see fig. 32) or tends to be 0 degrees. Of course, in another alternative embodiment, the included angle α3 between the first and second hand rest 121, 122 may be an obtuse angle or an acute angle when the frame body 100 is in the unfolded state.

Referring to fig. 34 and 35, in one embodiment, the locking mechanism 124 includes a lock 1241 and a lock recess 1242. The locking member 1241 is movably disposed in the pivot body 1232, and the locking recess 1242 is formed on the fixing body 1231. When the locking mechanism 124 is in a locked state, the locking member 1241 is inserted into the locking recess 1242 to limit the rotation of the pivot base 1232 relative to the holder base 1231. When the locking mechanism 124 is in the unlocked state, the locking member 1241 is retracted away from the locking recess 1242 to allow the pivoting body 1232 to rotate relative to the mounting body 1231.

With continued reference to fig. 34 and 35, the release mechanism 125 is disposed on either the first push frame 121 or the second push frame 122 and is operatively connected to the locking mechanism 124. The lock release mechanism 125 is used to control the lock mechanism 124 to switch between the locked and unlocked states to restrict or allow relative rotation of the first and second hand rest 121, 122. Specifically, the lock release mechanism 125 includes a lock release operation member 12510, a lock release cord 12520, and an elastic return member 12530. One end of the lock release rope 12520 is connected to the lock release operation member 12510, and the other end is connected to the lock member 1241. In this way, when the lock release operation member 12510 is pressed, the lock member 1241 can be pulled to move by the lock release cord 12520 to retreat from the lock recess 1242. The elastic restoring member 12530 abuts against the abutting locking member 1241, and is used for driving the locking member 1241 to restore so as to keep the locking member 1241 in a locked state. Specifically, in the present embodiment, the lock release mechanism 125 is provided on the first pusher arm 121. The lock release operating member 12510 is movably disposed on the first hand pushing frame 121, more specifically, on the hand pushing rod 1213, and the lock release rope 12520 is disposed in the hand pushing rod 1213 and the first supporting rod 1212 and is connected between the lock release operating member 12510 and the locking member 1241. Of course, in another alternative embodiment, the setting position of the lock release operating member 12510 may also be located on the first support rod 1212 or the second support rod 1221, which is not limited herein.

Fig. 26 to 32 show a folding process of the frame body 100. Wherein the stroller 100 of fig. 26 and 27 is in an unfolded state, the stroller 100 of fig. 28 and 29 is in a first transitional state between an unfolded state and a folded state, the stroller 100 of fig. 30 and 31 is in a second transitional state between an unfolded state and a folded state, and the stroller 100 of fig. 32 is in a folded state. When it is desired to fold the stroller 1000 or the frame body 100 in this embodiment, the lock release mechanism 125 is operated (e.g., depressed) to place the lock mechanism 124 in the unlocked state. Subsequently, the first pusher arm 121 is rotated about the second pivot base 123 (i.e., about the fifth pivot point A5) to be folded with respect to the second pusher arm 122. In the rotation process, the pushing portion 1211 of the first pushing frame 121 pushes the driving assembly 310 downward, so that the driving assembly 310 rotates around the second rotation point B2 in the clockwise direction W2, and the linking member 330 is driven to move relative to the rear wheel frame and rotate relative to the driving assembly 310, so as to drive the basket bar assembly 500 to fold. In addition, while the first push handle 121 rotates relative to the second push handle 122 such that the pushing portion 1211 pushes the driving assembly 310 downward, the second push handle 122 rotates about the first pivot seat 130 (i.e., about the fourth pivot point A4) to approach the rear wheel frame 112 until the frame body 100 is folded to the folded state of fig. 32 and 33.

Referring to fig. 23 and 25, in one embodiment, the basket bar assembly 500 may be used, for example, to support or mount a basket (not shown) such that a user may place a portion of the carry-on items in the basket to reduce the carrying burden. Specifically, the basket bar assembly 500 may include a front tube 510 and a rear tube 520 pivotally connected. The front tube 510 is pivotally connected to the front wheel frame 111 at a seventh pivot point (or seventh pivot axis) A7, and is pivotally connected to the rear tube 520 at a fifth pivot point (or fifth pivot axis) B5. The rear tube 520 and the rear wheel frame 112 are pivotally connected to an eighth pivot point (or eighth pivot axis) A8. Thus, by rotating the front pipe body 510 around the seventh pivot point A7, the rear pipe body 520 rotates around the eighth pivot point A8, and the front pipe body 510 rotates around the fifth pivot point B5 with respect to the rear pipe body 520, the basket rod assembly 500 is foldable, and thus can be switched between the extended state and the folded state. Wherein the seventh pivot axis A7, the fifth pivot axis B5 and the eighth pivot axis A8 are parallel to each other. More specifically, the fourth pivot axis A4 and the seventh pivot axis A7 also remain parallel.

Specifically, in the present embodiment, as shown in fig. 23 and 25, the front pipe body 510 includes two front basket rods 513 arranged side by side at a left-right interval, and first ends of the two front basket rods 513 are pivotally connected to the seventh pivot point A7 with the front rod 1111 on the same side as the front wheel frame 111, respectively. The rear pipe body 520 has a U-shaped structure including two rear basket bars 521 located at both left and right sides and a connection rod 522 connected between the two rear basket bars 521 (see fig. 35). The two rear basket rods 521 are pivotally connected to the eighth pivot point A8 with the rear rod 1121 on the same side of the rear wheel frame 112, respectively, and are pivotally connected to the fifth pivot point B5 with the second ends of the front basket rods 513 on the same side, respectively. The left and right sides of the basket bar assembly 500 are correspondingly pivoted to the left and right sides of the frame body 100, respectively, so that the stability of the basket bar assembly 500 supporting the basket can be improved.

In order to facilitate the rotation of the rear pipe 520 relative to the front pipe 510 (i.e., to facilitate the bending of the basket rod assembly 500), the smoothness of the basket rod assembly 500 from the unfolded state to the folded state is improved, and in an embodiment, as shown in fig. 25, the front pipe 510 includes a first pipe section 511 and a second pipe section 512 disposed at an included angle. Specifically, each front basket 513 includes a first tube section 511 and a second tube section 512 disposed at an angle, i.e., corresponding to each front basket 513 having an L-shaped configuration. Wherein, the end of the first tube section 511 away from the second tube section 512 is pivotally connected to the front wheel frame 111 at a seventh pivot point A7, and the end of the second tube section 512 away from the first tube section 511 is pivotally connected to the rear tube body 520 at a fifth pivot point B5. The opening of the angle α4 between the first tube section 511 and the second tube section 512 is disposed downward along the first direction F1. In this way, the hinge dead point of the fifth rotation point B5 can be prevented, and the bending reliability of the front pipe body 510 and the rear pipe body 520 can be improved. The first direction F1 refers to a vertical direction, and in this embodiment, refers to a height direction of the frame body 100 when the frame body 100 is in the unfolded state.

Referring to fig. 26 and 27, when the basket assembly 500 is in the extended state, the included angle α5 between the first tube section 511 and the rear tube body 520 is substantially 180 degrees (see fig. 27). Referring to fig. 32 and 33, when the basket assembly 500 is in the folded state, the included angle α5 between the first tube section 511 and the rear tube body 520 is an acute angle or substantially 0 degrees (see fig. 32). It should be noted that, when the basket rod assembly 500 is in the folded state, the included angle α5 between the first pipe section 511 and the rear pipe body 520 may be an acute angle or substantially 0 degrees, which may be specific according to practical situations. In this embodiment, as shown in fig. 27, 29, 31 and 33, when the frame body 100 is switched from the unfolded state to the folded state, the basket rod assembly 500 is switched from the unfolded state to the folded state, and in this process, the included angle α5 between the first pipe section 511 and the rear pipe body 520 is gradually changed from 180 degrees to an acute angle.

It should be noted that, the above-mentioned "the driving assembly 310 is pivoted between the handlebar 120 and the wheel frame 110" includes at least two examples.

Referring to fig. 26 to 29, in an example, the driving assembly 310 of the folding mechanism 300 is pivoted between the rear wheel frame 112 and the handlebar 120, and the linkage member 330 is pivoted with the driving assembly 310 and the rear tube 520, respectively, for driving the rear tube 520 to rotate about the eighth pivot point A8 and rotating the rear tube 520 about the fifth pivot point B5 with respect to the front tube 510, thereby allowing the rear wheel frame 112 to pivot with respect to the front wheel frame 111. In one example, the drive assembly 310 is a rod-like structure and has a first drive section 3111 and a second drive section 3112. The first and second driving sections 3111 and 3112 have first and second ends, respectively. The first end of the first driving section 3111 and the first end of the second driving section 311 are distant from each other, and the second end of the first driving section 3111 and the second end of the second driving section 311 are connected together.

The first end of the first driving section 3111 is pivotally connected to the first push frame 121 of the handlebar frame 120, the first end of the second driving section 3112 is pivotally connected to the linkage member 330, and the second rotation point B2 is located between the first driving section 3111 and the second driving section 3112, specifically, at a position where the second end of the first driving section 3111 and the second end of the second driving section 3112 are connected. In other words, the second end of the first driving section 3111 and the second end of the second driving section 3112 are both connected to the second rotation point B2. The second rotation point B2 is closer to the first end of the second drive section 3112 of the drive assembly 310 than the first end of the first drive section 3111. Thus, when the frame body 100 is in the unfolded state (see fig. 26 and 27), the second driving section 3112 of the driving assembly 310 can be regarded as being located between the front wheel frame 111 and the rear wheel frame 112, i.e. the pivot point C1 corresponding to the linking member 330 and the driving assembly 310 is located between the front wheel frame 111 and the rear wheel frame 112. Therefore, when the driving assembly 310 pivots about the second pivot point B2, the driving assembly 310 drives the linking member 330 to integrally move about the pivot point B2 relative to the rear wheel frame 112 and pivots the linking member 330 relative to the driving assembly 310, such that the fifth pivot point B5 of the rear and front tubes 520 and 510 is integrally moved (e.g. toward the first pivot 130), thereby rotating the rear tube 520 about the eighth pivot point A8 and the front tube 510 about the seventh pivot point A7, and such that the distance between the eighth pivot point A8 and the seventh pivot point A7 is changed, and the rear wheel frame 112 pivots relative to the front wheel frame 111. It can be appreciated that the second rotation point B2 is closer to the first end of the second driving section 3112 of the driving assembly 310 than the first end of the first driving section 3111, so that the length of the first driving section 3111 is longer than that of the second driving section 3112, and the arm of force is longer and more labor-saving when the driving assembly 310 is operated to fold the frame body 100.

With continued reference to fig. 26-29, the drive assembly 310 is pivotally connected between the handlebar 120 and the rear wheel frame 112 (specifically, the rear lever 1121) and forms a second pivot point (or second pivot axis) B2 on the rear wheel frame 112 (rear lever 1121). The second axis of rotation B2 is parallel to the eighth pivot axis A8. The linkage member 330 is pivotally connected to the driving assembly 310 and the rear tube 520 (specifically, the rear basket 521), respectively, and a pivot point C2 of the linkage member 330 and the rear tube 520 (the rear basket 521) is located between the fifth pivot point B5 and the eighth pivot point A8, and the pivot point C2 is closer to the fifth pivot point B5.

Of course, in another alternative example not shown, the driving assembly 310 may also be pivoted between the front wheel frame 111 and the handlebar 120, specifically, the first driving section 3111 of the driving assembly 310 is pivoted with the handlebar 120, and the second driving section 3112 of the driving assembly 310 is pivoted with the front wheel frame 111. The linkage member 330 is pivotally connected to the driving assembly 310 and the front tube 510, respectively, for driving the front tube 510 to rotate about the seventh pivot point A7 and for rotating the front tube 510 relative to the rear tube 520 about the fifth pivot point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111.

Referring to fig. 26 to 29, in an embodiment, the first driving section 3111 of the driving assembly 310 and the second driving section 3112 thereof are disposed at an angle, and an opening of the first angle α1 between the first driving section 3111 and the second driving section 3112 is disposed upward along the first direction F1.

Specifically, the first angle α1 between the first driving section 3111 and the second driving section 3112 is an obtuse angle. When the frame body 100 is in the unfolded state, the opening of the first included angle α1 is disposed obliquely upward along the first direction F1. Of course, in another alternative embodiment, the first angle α1 between the first driving section 3111 and the second driving section 3112 may be a right angle or an acute angle, which may be specifically set according to practical requirements. When the handle 120 is folded, which is equivalent to rotating the first pushing frame 121 around the second pivot base 123 relative to the second pushing frame 122, the pushing portion 1211 pushes the first driving section 3111 of the driving assembly 310 to rotate downward around the second rotation point B2, and simultaneously the second driving section 3112 rotates upward around the second rotation point B2. Since the opening of the first angle α1 between the first driving segment 3111 and the second driving segment 3112 is disposed upward along the first direction F1, when the second driving segment 3112 moves upward, the linking member 330 can be more easily driven to move upward, so that the pivot point C2 and the fifth rotation point B5 also move upward more easily. In other words, the first driving section 3111 and the second driving section 3112 are disposed at an included angle, and the opening of the first included angle α1 between the two is disposed upward, so that the folding of the basket bar assembly 500 (specifically, between the front tube 510 and the rear tube 520) is facilitated, when the frame body 100 is folded, the driving assembly 310 can more easily drive the fifth rotation point B5 to move upward when rotating along the clockwise direction W2, so that the basket assembly 200 can more easily move upward to be folded, so that the rear tube 520 is more close to the rear wheel frame 112, interference with the seat assembly 200 mentioned below is avoided when folding, and the folding reliability of the whole frame body 100 is affected.

Referring to fig. 26-29, in one embodiment, the first drive section 3111 of the drive assembly 310 has a length that is greater than the length of the second drive section 3112 thereof. The first and second driving sections 3111 and 3112 form a lever structure (see-saw structure) with respect to the second rotation point B2. Since the first driving section 3111 has a long moment arm, the basket pole assembly 500 can be more easily and less effort when being folded by operating the first driving section 3111.

Referring to fig. 27, 29 and 31, in one embodiment, the driving assembly 310 is provided with a stop 317. When the basket bar assembly 500 is in the extended state, the stop 317 is configured to abut the linkage member 330 to limit the linkage member 330 from pivoting in the clockwise direction W2 relative to the drive assembly 310 (e.g., about the pivot point C1) such that the rear tube 520 is not movable relative to the drive assembly 310, thereby maintaining the basket bar assembly 500 in the extended state. Specifically, the stop portion 317 is disposed at one end of the driving assembly 310 near the pivot point C1 of the linking member 330 and the rear tube 520, i.e. disposed at the second driving section 3112, and is located between the fifth pivot point B5 and the eighth pivot point A8 at a side of the driving assembly 310 relatively near the handlebar 120. More specifically, as shown in fig. 27, when the basket bar assembly 500 is in the unfolded state, the stopper 317 is positioned at the upper left side of the interlocking member 330, so that the interlocking member 330 may be restricted from continuing to rotate about the pivot point C1 in the clockwise direction W2, such that the interlocking member 330 is kept stationary by abutting against the stopper 317, and such that the interlocking member 330 is kept relatively stationary with respect to the rear tube 520, and the rear tube 520 is kept stationary with respect to the front tube 510, the rear wheel frame 112, and the like, so that the frame body 100 can be stably maintained in the unfolded state. In addition, when the basket rod assembly 500 is switched from the unfolded state to the folded state, the stop portion 317 can also avoid the behaviors such as misoperation of the user. Specifically, when the user desires to fold the basket bar assembly 500, the driving assembly 310 can be rotated about the second rotation point B2 in the clockwise direction W2, which is equivalent to pushing the first driving section 3111 of the driving assembly 310 downward. Therefore, after the stop portion 317 is provided, the stop portion 317 can abut against the linkage member 330, such that the user can only push the first driving section 3111 of the driving assembly 310 downward, and the user is restricted from pushing the first driving section 3111 of the driving assembly 310 upward. More specifically, when the frame body 100 is in the folded state, the basket bar assembly 500 is in the folded state, and at this time, the stopper 317 is located on the right side of the link member 330 and abuts against the link member 330, so that the link member 330 can be restricted from continuing to rotate around the pivot point C1 in the counterclockwise direction W1, so that the basket bar assembly 500 can be stably maintained in the folded state. Likewise, when the basket rod assembly 500 is switched from the folded state to the unfolded state, the stopper 317 can also avoid the user from operating by mistake. Specifically, when the user desires to unfold the basket rod assembly 500, the driving assembly 310 may be rotated about the second rotation point B2 in the counterclockwise direction W1, i.e., corresponding to pushing the first driving section 3111 of the driving assembly 310 upward. Therefore, when the stop 317 is located on the right side of the linkage member 330 and abuts against the linkage member 330, the user can only push the first driving section 3111 of the driving assembly 310 upward, and the user is restricted from pushing the first driving section 3111 of the driving assembly 310 downward.

Referring to fig. 21 and 23, in one embodiment, the stroller 1000 further comprises a seat assembly 200. The seat assembly 200 may be used directly as a seat cushion and a child may sit directly on the seat assembly 200. Of course, in another alternative embodiment, the seat assembly 200 may be used as a support for supporting a vehicle by which a child is supported on the seat assembly 200. With continued reference to fig. 21-23, when the frame body 100 is in the deployed state, the seat assembly 200 is positioned above the basket bar assembly 500 (see fig. 21 and 22). The seat assembly 200 is pivotally connected to the first pivot base 130 and the driving assembly 310, respectively, wherein the seat assembly 200 and the first pivot base 130 are pivotally connected to the second pivot point A2 (or the second pivot axis), and the seat assembly 200 and the driving assembly 310 are pivotally connected to the seventh pivot point (or the seventh pivot axis) B7. The seventh rotation point B7 is located at a side of the second rotation point B2 away from the interlocking member 330. In this way, when the frame body 100 is switched from the unfolded state to the folded state, the driving assembly 310 rotates to drive the seat assembly 200 to rotate relative to the first pivot seat 130, and at the same time, the driving assembly 310 drives the linkage member 330 to rotate to drive the basket rod assembly 500 to fold, thereby achieving synchronous folding of the seat assembly 200 and the basket rod assembly 500 (see fig. 29 and 31).

The seat assembly 200 is generally parallel to the rear tube 520, and the second pivot axis A2 and the seventh pivot axis B7 are both generally parallel to the fourth pivot axis A4. Thus, both the seat assembly 200 and the basket bar assembly 500 (specifically, the rear pipe 520) can be maintained substantially parallel to each other during the switching of the frame body 100 from the unfolded state to the folded state, thereby preventing the seat assembly 200 from interfering with the basket bar assembly 500.

Referring to fig. 22 and 23, in one embodiment, the seat assembly 200 includes, for example, a seat pan 212, a seat tube set 230, and a support bar 240. The seat tube set 230 is pivotally connected between the first pivot base 130 and the driving assembly 310. The seat pan 212 is mounted to the seat tube set 230 for supporting a vehicle or directly supporting a child. Specifically, the seat pan 212 is removably mounted to the seat tube assembly 230, such as by a snap fit connection, a screw connection, or the like. Of course, in another alternative embodiment, the seat pan 212 is fixedly mounted to the seat tube set 230. With continued reference to fig. 23, the support bar 240 is disposed on the seat tube set 230 on a side of the seat pan 212 facing the basket bar assembly 500. Of course, in other embodiments not shown, the seat assembly 200 may not be provided with the support bar 240, and the application is not limited thereto.

Referring to fig. 23 and 25, in an embodiment, the seat tube group 230 has, for example, a U-shaped structure including first seat tubes 231 located on both left and right sides and second seat tubes 232 connected between the two first seat tubes 231, the second seat tubes 232 extending in the second direction F2. The two first seat pipes 231 are pivotally connected to the first pivot blocks 130 on the same side. The support bar 240 is connected between the two first seat pipes 231, and the support bar 240 is disposed substantially along the second direction F2. In this way, the seat tube set 230 can be more stable when mounted to the frame body 100, which is advantageous for improving the stability of the seat assembly 200 for supporting a vehicle or child. Of course, in other embodiments not shown, the seat tube set 230 may not be provided with the second seat tube 232, which is not a limitation of the present application.

The operation of the folding mechanism 300 will be described below with reference to fig. 26 to 31.

Referring to fig. 26 and 27, when the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state, the first push frame 121 and the second push frame 122 remain relatively fixed, that is, the pushing portion 1211 also remains relatively fixed. Since the second push frame 122, the pushing portion 1211, the driving unit 310 and the rear wheel frame 112 form a four-bar linkage structure, when the first push frame 121 and the second push frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and cannot move, so that the second push frame 122, the driving unit 310 and the rear wheel frame 112 remain relatively fixed and cannot rotate, and finally the frame body 100 can be stably maintained in the unfolded state. Meanwhile, since the seat tube set 230, the rear wheel frame 112 and the driving assembly 310 can be formed in an approximately triangular structure, the seat assembly 200 can be maintained in a unfolded state and always located above the basket bar assembly 500 while the rear wheel frame 112 and the driving assembly 310 are kept fixed. In addition, when the frame body 100 is in the unfolded state, the basket bar assembly 500 is in the unfolded state, at this time, the front wheel frame 111 and the rear wheel frame 112 are disposed at an included angle, at least a portion of the basket bar assembly 500 is located between the front wheel frame 111 and the rear wheel frame 112, and the front pipe 510 and the rear pipe 520 are substantially in the same plane, so that the whole of the front wheel frame 111, the rear wheel frame 112 and the basket bar assembly 500 can be regarded as a triangle structure, and the front wheel frame 111, the rear wheel frame 112 and the basket bar assembly 500 can be kept relatively fixed, so that the frame body 100 can be kept in the unfolded state stably.

Referring to fig. 26 to 31, when the user needs to switch the frame body 100 from the unfolded state (see fig. 26 and 27) to the folded state (see fig. 30 and 31), pressing the lock release mechanism 125 switches the lock mechanism 124 to the lock release state. Subsequently, the first pushing frame 121 is rotated in the counterclockwise direction W1 about the second pivot base 123 (or about the fifth pivot point A5) to fold relative to the second pushing frame 122. During the rotation, the pushing portion 1211 of the first pushing frame 121 pushes the driving assembly 310 downward, so that the driving assembly 310 rotates around the second rotation point B2 in the clockwise direction W2. At this time, the first driving section 3111 of the driving unit 310 rotates downward around the second rotation point B2, the second driving section 3112 of the driving unit 310 rotates upward around the second rotation point B2, the linkage member 330 connected to the first driving section 3111 moves upward as a whole, the pivot point C1 of the linkage member 330 and the rear frame body 520 also moves upward, so that the rear frame body 520 pivots around the eighth pivot point A8 in the clockwise direction W2, thereby the fifth rotation point B5 of the rear frame body 520 and the front frame body 510 moves upward, the front frame body 510 is driven to rotate around the seventh pivot point A7 in the counterclockwise direction W1, and the basket assembly 500 is switched from the extended state to the folded state, the distance between the seventh pivot point A7 and the eighth pivot point A8 is reduced, and finally the front frame 111 and the rear frame body 100 are close to each other. In this process, one end of the linkage member 330 rotates in the counterclockwise direction W1 about the pivot point C1 relative to the driving assembly 310, and the other end of the linkage member 330 rotates in the counterclockwise direction W1 about the pivot point C2 relative to the rear tube 520 to adjust the angle and the distance between the driving assembly 310 and the rear tube 520, thereby providing a degree of freedom of movement for the relative movement between the driving assembly 310 and the rear tube 520, and allowing the rear tube 520 to be driven to pivot when the driving assembly 310 rotates. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot base 130, respectively, the seat assembly 200 is driven to rotate about the clockwise direction W2 relative to the first pivot base 130 during the rotation of the driving assembly 310 about the second rotation point B2 in the clockwise direction W2, thereby achieving the synchronous folding of the seat assembly 200 and the basket bar assembly 500.

Of course, when the user needs to switch the frame body 100 from the folded state to the unfolded state, the first pushing frame 121 can be rotated around the second pivot seat 123 (or around the fifth pivot point A5) in the counterclockwise direction W1 to be unfolded relative to the second pushing frame 122 without pressing the release mechanism 125. During the rotation, the pushing portion 1211 of the first pushing frame 121 pushes the driving assembly 310 upward, so that the driving assembly 310 rotates around the second rotation point B2 in the counterclockwise direction W1. At this time, the second driving section 3112 of the driving assembly 310 rotates downward around the second rotation point B2, so as to push the linkage member 330 to move downward as a whole, and thus push the pivot point C2 of the linkage member 330 and the rear tube 520 to move downward. Therefore, the rear tube 520 rotates around the eighth pivot point A8 along the counterclockwise direction W1, the fifth rotation points B5 of the front tube 510 and the rear tube 520 move downward, so as to drive the front tube 510 to rotate along the clockwise direction W2, further extend the front tube 510 and the rear tube 520 relatively, and increase the distance between the seventh pivot point A7 and the eighth pivot point A8, and finally push the front wheel frame 111 and the rear wheel frame 112 away from each other, so that the frame body 100 can be unfolded. In this process, one end of the link member 330 pivots about the pivot point C1 in the clockwise direction W2, and the other end of the link member 330 pivots about the pivot point C2 in the clockwise direction W2 to adjust the angle and the interval between the driving assembly 310 and the rear tube 520, thereby allowing the rear tube 520 to be driven to pivot when the driving assembly 310 rotates. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot block 130, respectively, the seat assembly 200 is driven to rotate about the counterclockwise direction W1 relative to the first pivot block 130 during the rotation of the driving assembly 310 about the second rotation point B2 in the counterclockwise direction W1, thereby achieving the synchronous deployment of the seat assembly 200 and the basket bar assembly 500.

Referring to fig. 35-38, in an embodiment, the stroller 1000 further comprises a collapsing aid 600. The folding auxiliary 600 is, for example, a folding webbing. The support rod 240 is spaced apart from the seat plate 212 and forms a pass-through channel 250. The folding auxiliary member 600 is connected to the basket bar assembly 500 and passes through the penetration passage 250. During folding of the frame body 100, the folding assistant 600 is operated to drive the basket bar assembly 500 to switch from the extended state to the folded state. When the frame body 100 is in the unfolded state, the folding auxiliary piece 600 is located below the seat plate 212, so that the influence of the exposed folding auxiliary piece 600 on the attractiveness of the stroller is avoided. In addition, the folding auxiliary member 600 is supported on the support bar 240, and is stored and erected on the support bar 240 when not in use, so that the folding auxiliary member can be prevented from falling to the ground and interfering with the rear wheel 622 when pushing the stroller 1000 to walk.

In the present embodiment, as shown in fig. 25, 26, 36 and 37, the folding webbing is connected to the rear tube 520, and the connection point of the folding webbing and the rear tube is located between the eighth pivot point A8 and the fifth pivot point B5. Thus, when the frame body 100 is folded, the user can pull the folding braid upward along the first direction F1, and the folding braid applies an upward force to one end of the rear tube 520 close to the front tube 510, so that the rear tube 520 rotates around the eighth pivot point A8 in the clockwise direction W2, and further drives the basket rod assembly 500 and the frame body 100 to be folded rapidly, thereby improving the smoothness of folding the frame body 100. More specifically, the retracting webbing is connected at the pivot point C2 of the connector and the rear tube 520.

Of course, in another alternative embodiment, not shown, the folding webbing may be connected to the front tube 510, for example, and the connection point of the two is located at the end of the front tube 510 near the fifth rotation point B5. In this way, the front pipe 510 is driven to rotate around the seventh pivot point A7 in the counterclockwise direction by pulling the folding webbing upward, so as to drive the basket rod assembly 500 and the frame body 100 to fold up rapidly. In addition, in another alternative embodiment, the retracting webbing may be directly connected to the fifth rotation point B5, or may be further connected to the second driving segment 3112 of the driving assembly 310, which is not particularly limited to the present application.

As can be seen from the above description, in the stroller 1000 according to the present application, the wheel frame 110 and the handlebar 120 are foldable, and the wheel frame 110 is foldable relative to the handlebar 120, so that the frame body 100 can be freely switched between the unfolded state and the folded state. Because the basket bar assembly 500 is pivoted on the wheel frame 110 and has an extended state and a folded state, the driving assembly 310 is pivoted between the handlebar 120 and the wheel frame 110 and is movably connected with the basket bar assembly 500 through the linkage member 330, when the child stroller 1000 of the present application is folded, the driving assembly 310 can be moved/rotated integrally relative to the frame body 100 by directly folding the frame body 100, and the linkage member 330 is driven to pivot, so as to drive the basket bar assembly 500 to rotate, and the basket bar assembly 500 is switched from the extended state to the folded state. Thus, not only the folding convenience of the child stroller 1000 can be improved, but also the folding smoothness of the child stroller 1000 can be improved. Meanwhile, since the seat assembly 200 is pivotally connected between the wheel frame 110 and the driving assembly 310 in the present application, the seat assembly 200 is generally parallel to the rear tube 520 in the basket bar assembly 500, and the driving assembly 310 and the linkage member 330 are structurally disposed (particularly, the driving assembly 310 is pivotally connected between the rear wheel frame 112 and the handlebar 120, and the linkage member 330 is pivotally connected to the second driving section 3112 of the driving assembly 310 near the fifth rotation point B5), when the frame body 100 is folded, the driving assembly 310 drives the basket bar assembly 500 to bend and fold (the front tube 510 and the rear tube 520 are relatively folded), so that the basket bar assembly 500 can be more smoothly folded and close to the rear wheel frame 112, and meanwhile, the driving assembly 310 can drive the seat assembly 200 to pivot and fold synchronously, so that the seat assembly 200 is always kept generally parallel to the rear tube 520, even for a large-sized basket assembly 200, the basket assembly 500 can be smoothly folded quickly, and interference between the basket assembly 500 and the seat assembly 200 can be avoided during folding process, and the whole folding reliability of the stroller 1000 can be ensured.

According to the frame body provided by the embodiment of the application, the smoothness and convenience of the folding of the baby carriage can be improved, and the folding difficulty of the baby carriage is reduced.

In the child cart disclosed by the application, the wheel frame and the cart hand frame can be folded relatively so that the frame body is in an unfolding state and a folding state, the basket rod assembly is pivoted on the wheel frame and is in an unfolding state and a folding state, and the driving assembly is pivoted between the cart hand frame and the wheel frame and is movably connected with the basket rod assembly through the linkage part, so that when the child cart is folded, the driving assembly directly drives the linkage part to pivot in a mode of folding the frame body, and the basket rod assembly is driven to be switched from the unfolding state to the folding state, thereby not only improving the folding convenience of the child cart, but also improving the folding smoothness of the child cart.

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

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

Claims

1. A baby stroller, comprising:

A frame body, comprising a wheel frame and a rider frame, wherein the rider frame and the wheel frame are pivotally connected to each other so that the frame body can be switched between an unfolded state and a folded state;

A seat assembly, comprising a seat portion and a backrest portion, wherein the seat portion and the backrest portion are pivotally connected to each other to form a first pivot point, and the seat portion is pivotally connected to the frame body to form a second pivot point; and

The folding mechanism comprises a driving assembly and a linkage member, wherein the driving assembly is pivotally connected between the rider frame and the wheel frame, and the linkage member is pivotally connected to the driving assembly and the seat portion respectively;

When the frame body switches from the unfolded state to the folded state, the drive assembly pivots relative to the wheel frame or the rider frame and drives the first pivot point of the seat portion to rotate upward along the first direction around the second pivot point through the linkage, thereby driving the seat assembly to fold.

2. The stroller according to claim 1, characterized in that:

The wheel frame comprises a front wheel frame and a rear wheel frame pivotally connected to each other;

The driving assembly comprises a driving member and a rotating member.

The driving member is pivotally connected between the rider frame and the rear wheel frame, one end of the rotating member is pivotally connected to the front wheel frame, and the other end is pivotally connected to the driving member at a first rotating point, the first end of the linkage member is pivotally connected to the seat portion, and the second end is pivotally connected to the driving member or the rotating member;

When the frame body is in the unfolded state, the first rotation point is located between the front wheel frame and the rear wheel frame; and when the frame body switches from the unfolded state to the folded state, the driving member pivots relative to the rear wheel frame or the rider frame and drives the linkage member to move upward along the first direction, so that the first pivot point of the seat part rotates upward around the second pivot point along the first turning direction.

3. The stroller according to claim 2, characterized in that:

The driving assembly further comprises a transmission member, which is arranged on the driving member or the rotating member, and the second end of the linkage member is pivotally connected to the transmission member;

When the frame body is in the unfolded state, the transmission member is located between the front wheel frame and the rear wheel frame.

4. The stroller according to claim 3, characterized in that the transmission member is arranged at an angle with the driving member or the rotating member;

And/or, the transmission member is arranged on a side of the driving member or the rotating member facing away from the seat assembly.

5. The stroller according to claim 1, characterized in that:

The driving assembly comprises a driving member and a transmission member, wherein the driving member is pivotally connected between the rider frame and the wheel frame, the transmission member is arranged on the driving member, the second end of the linkage member is pivotally connected to the transmission member, and the first end of the linkage member is pivotally connected to the seat portion;

When the frame body switches from the unfolded state to the folded state, the driving member drives the transmission member to pivot relative to the wheel frame, and the transmission member drives the linkage member to move upward along the first direction, so that the first pivot point of the seat part rotates upward around the second pivot point along the first turning direction.

6. The stroller according to claim 3 or 5, characterized in that:

The transmission member is arranged on the driving member;

The driving member comprises a first driving section and a second driving section connected to each other, the first driving section is pivotally connected to the rider frame, the second driving section is pivotally connected to the rear wheel frame of the wheel frame at a second rotation point, the second driving section is pivotally connected to the rotating member at a first rotation point, and the transmission member is arranged on the second driving section;

Optionally, the transmission member is integrally formed on the driving member.

7. The stroller according to claim 6, characterized in that a first angle is formed between the first driving section and the second driving section, and at least when the frame body is in the unfolded state, the opening of the first angle is arranged upward along a first direction; at least a part of the transmission member is located on a side of the second driving section away from the opening of the first angle;

And/or, the transmission member includes a first section and a second section connected to each other, and a second angle is formed between the first section and the second section, the first section is stacked on the driving member and is located between the first rotation point and the second rotation point, the second section is pivotally connected to the linkage member, and at least when the frame body is in the unfolded state, the opening of the second angle is arranged downward along the first direction.

8 . The stroller according to claim 7 , wherein the linkage member is pivotally connected to an end of the second section away from the first section.

9. A stroller according to any one of claims 1-5, characterized in that the handle frame comprises a first handle frame, a second handle frame and a second pivot seat, the second pivot seat has a fifth pivot point, the second handle frame is pivotally connected to the wheel frame and is pivotally connected to the first handle frame at the fifth pivot point through the second pivot seat, and the drive assembly is pivotally connected between the first handle frame and the wheel frame.

10. The baby stroller according to claim 9, wherein the handlebar frame further comprises:

a locking mechanism disposed in the second pivot seat, the locking mechanism having a locking state for limiting relative rotation of the first handle frame and the second handle frame and a releasing state for allowing relative rotation of the first handle frame and the second handle frame; and

The release mechanism is arranged on the rider frame and is operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the release state.

11. The stroller according to claim 10, characterized in that:

The second pivot seat comprises a fixed seat body and a pivot seat body, the fixed seat body and the pivot seat body are capable of pivoting around the fifth pivot point, one of the fixed seat body and the pivot seat body is connected to the first push handle frame, and the other is connected to the second push handle frame;

The locking mechanism comprises a locking member and a locking recess, wherein the locking member is movably disposed on one of the fixed seat body and the pivoting seat body, and the locking recess is formed on the other of the pivoting seat body and the fixed seat body;

When the locking mechanism is in the locking state, the locking piece is inserted into the locking recess, and when the locking mechanism is in the unlocking state, the locking piece is withdrawn from the locking recess;

Optionally, the lock release mechanism comprises:

A driving wheel rotatably disposed on the first push handle frame;

a traction member connected between the driving wheel and the locking member; and

A first operating member is movably disposed on the first handle frame and connected to the driving wheel.

The first operating member has a first locking position and a first unlocking position. When the first operating member moves from the first locking position to the first unlocking position, the first operating member drives the driving wheel to rotate, and the driving wheel drives the locking mechanism to switch from the locking state to the unlocking state through the traction member.

Further optionally, the lock release mechanism further includes:

A second operating member is pivotally connected to the handlebar frame and has a locking portion and an operable operating portion. The second operating member can pivot between a second locking position and a second unlocking position. When the second operating member is located at the second locking position, the locking portion is located on a moving path of the first operating member to restrict movement of the first operating member. When the second operating member is located at the first unlocking position, the locking portion deviates from the moving path of the first operating member to allow movement of the first operating member.

12. The stroller according to claim 9, characterized in that:

The driving assembly and the wheel frame are pivotally connected at a second rotation point;

The first handle frame has a push portion at the end close to the second handle frame, the driving assembly is pivotally connected between the push portion and the wheel frame, and a fourth rotation point is formed on the push portion, the fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-bar structure, and the frame body is switched between the expanded state and the folded state through the four-bar structure.

13. A baby stroller, comprising:

A basket rod assembly is pivotally connected to the wheel frame and has an extended state and a folded state; and

The folding mechanism comprises a driving assembly and a linkage component, wherein the driving assembly is pivotally connected between the rider frame and the wheel frame, and is movably connected to the basket rod assembly through the linkage component;

When the frame body switches between the unfolded state and the folded state, the driving assembly pivots relative to the wheel frame or the handlebar frame and drives the basket rod assembly to switch between the extended state and the folded state through the linkage component.

14. The stroller according to claim 13, characterized in that:

The wheel frame comprises a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame;

The basket rod assembly comprises a front tube body and a rear tube body, the front tube body is pivotally connected to the front wheel frame at a seventh pivot point, and is pivotally connected to the rear tube body at a fifth rotation point, and the rear tube body is pivotally connected to the rear wheel frame at an eighth pivot point;

The driving assembly is pivotally connected between the rear wheel frame and the rider frame, and is movably connected to the rear tube body through the linkage component;

Alternatively, the driving assembly is pivotally connected between the front wheel frame and the rider frame, and is movably connected to the front tube body through the linkage component.

15. The stroller according to claim 14 is characterized in that the front tube body includes a first tube segment and a second tube segment arranged at an angle, an end of the first tube segment away from the second tube segment is pivotally connected to the front wheel frame at the seventh pivot point, an end of the second tube segment away from the first tube segment is pivotally connected to the rear tube body at the fifth rotation point, and an opening of the angle between the first tube segment and the second tube segment is arranged downward along the first direction.

16. The stroller according to claim 14, characterized in that:

The driving assembly forms a second rotation point on the rear wheel frame, and the linkage component is pivotally connected to the rear tube body and the driving assembly respectively.

When the driving assembly pivots around the second rotation point, the driving assembly drives the linkage component to move as a whole relative to the frame body and rotate relative to the driving assembly to allow the rear tube body to rotate around the eighth pivot point and the front tube body to rotate around the seventh pivot point.

17. The child stroller according to claim 16, characterized in that the driving assembly comprises a first driving section and a second driving section, the first driving section is pivotally connected to the handlebar frame, the second driving section is pivotally connected to the linkage component, and the second rotation point is located between the first driving section and the second driving section;

Optionally, the first driving section and the second driving section are arranged at an angle, and an opening of the first angle between the first driving section and the second driving section is arranged upward along a first direction.

18. The stroller according to claim 13, characterized in that the driving assembly is provided with a stopper, and when the basket rod assembly is in the extended state, the stopper is used to abut against the linkage component to limit the linkage component from pivoting relative to the driving assembly, thereby keeping the basket rod assembly in the extended state;

Optionally, the driving assembly is pivotally connected to the wheel frame at a second rotation point.

The stopper is arranged at the second driving section of the driving assembly close to the linkage component and is located at a side of the driving assembly relatively close to the rider frame.

19. The stroller according to claim 13, characterized in that the stroller further comprises a folding auxiliary component, wherein the folding auxiliary component is connected to the basket rod assembly to allow the basket rod assembly to be driven to switch to the folded state by operating the folding auxiliary component.

20. The stroller according to claim 13, characterized in that the stroller further comprises:

A first pivot seat, the wheel frame and the rider frame are coaxially pivoted at a fourth pivot point through the first pivot seat; and

a seat assembly pivotally connected to the first pivot seat and the drive assembly respectively;

When the frame body switches from the unfolded state to the folded state, the driving assembly drives the seat assembly to rotate relative to the first pivot seat to avoid interference with the folding process of the basket rod assembly.