Stroller

Abstract

The invention relates to a child stroller which comprises a stroller frame body comprising a wheel frame and a stroller hand frame, and the stroller hand frame is pivoted to the wheel frame so that the stroller frame body can be switched between an unfolded state and a folded state; the seat assembly comprises a seat part and a backrest part, the seat part and the backrest part are mutually pivoted to form a first pivoting point, and the seat part is pivoted to the frame body to form a second pivoting point; the folding mechanism comprises a driving assembly and a linkage piece, the driving assembly is pivoted between the stroller hand frame and the wheel frame, and the linkage piece is pivoted with the driving assembly and the seat part respectively; when the frame body is switched from the unfolded state to the folded state, the driving assembly pivots relative to the wheel frame or the handlebar frame and drives the first pivoting point of the seat part to rotate upwards around the second pivoting point in the first rotating direction through the linkage piece, and therefore the seat assembly is driven to be folded.

Description

Technical Field

[0001] The present application relates to the technical field of wheeled mobile devices, and in particular to a child stroller. Background Art

[0002] For families with infants and young children, using a stroller as an auxiliary care tool when going out has become very common and convenient. A stroller is mainly composed of a frame and a seat, and most of them are foldable. When the stroller is not needed, the frame and seat can be folded to reduce its size, making it easier to store or carry.

[0003] Generally speaking, the seat of a stroller includes a seat portion, a backrest portion, and a flexible cloth cover mounted on the outside of the seat portion and the backrest portion. When the frame is folded, the seat portion and the backrest portion rotate together with the frame, thereby achieving synchronous folding of the seat. However, when the seat of a stroller commonly found on the market is folded with the frame, the flexible cloth cover at the pivotal joint between the seat portion and the backrest portion becomes loose. As a result, during the folding process, the loose part of the cloth cover is easily in contact with the ground, which not only easily stains the cloth cover, but may also cause wear and tear on the cloth cover.

[0004] In addition, in order to meet the user's requirements for practicality and convenience of the stroller, a folding mechanism is generally provided on the stroller, and the user can switch the stroller between the unfolded state and the folded state through the folding mechanism. In addition, in order to facilitate the user to place the carry-on items and reduce the user's burden, a vegetable basket with a storage space is usually provided under the seat of the stroller. However, since the vegetable basket is located under the seat and is limited by the setting of the folding mechanism structure, it is easy to cause the operation of the stroller to be cumbersome and not smooth when folding, which increases the difficulty of folding the stroller. Summary of the invention

[0005] According to various embodiments of the present application, a child stroller is provided.

[0006] According to one aspect of the present application, a child stroller is provided, comprising: a frame body, comprising a wheel frame and a rider frame, the rider frame and the wheel frame being pivotally connected to each other so that the frame body can be switched between an expanded 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 drive assembly and a linkage, the drive assembly being pivotally connected between the rider frame and the wheel frame, and the linkage being pivotally connected to the drive assembly and the seat portion, respectively; when the frame body is switched from the expanded 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 a first direction around the second pivot point through the linkage, thereby driving the seat assembly to fold.

[0007] In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to each other; the driving assembly includes 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 expanded state, the first rotating point is located between the front wheel frame and the rear wheel frame; and when the frame body switches from the expanded 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 portion rotates upward around the second pivot point along the first turning direction.

[0008] In one embodiment, the drive assembly also includes a transmission member, which is arranged on the drive member or the rotating member, the first end of the linkage member is pivotally connected to the seat part, and the second end 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.

[0009] In one embodiment, the transmission member is arranged at an angle to the driving member or the rotating member.

[0010] 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.

[0011] In one embodiment, the driving member forms a second rotation point on the rear wheel frame, and the rotating 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 both 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 rotating member to rotate around the third rotation point, and causes the transmission member to rotate around the second rotation point or the third rotation point, so as to drive the linkage member to move as a whole relative to the frame body, thereby causing the first pivot point of the seat part to rotate around the second pivot point along the first turning point.

[0012] In one embodiment, the driving assembly includes a driving member and a transmission member, the driving member is pivoted 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 pivoted to the transmission member, and the first end of the linkage member is pivoted to the seat part; 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 point.

[0013] In one embodiment, the transmission member is arranged on the driving member; the driving member includes a first driving section and a second driving section that are connected, 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 the second rotation point, the second driving section is pivotally connected to the rotating member at the first rotation point, and the transmission member is arranged on the second driving section.

[0014] In one embodiment, the transmission member is integrally formed on the driving member.

[0015] In one embodiment, 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 portion of the transmission member is located on a side of the second driving section away from the opening of the first angle.

[0016] In one embodiment, 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.

[0017] In one embodiment, the linkage member is pivotally connected to an end of the second section away from the first section.

[0018] In one embodiment, the linkage member is pivotally connected to the seat portion at a third pivot point, and the third pivot point is located on a side of the second pivot point close to the first pivot point.

[0019] In one embodiment, the third pivot point is coaxial with the first pivot point.

[0020] In one embodiment, the frame body also includes a first pivot seat, and the wheel frame and the rider frame are coaxially pivoted at a fourth pivot point through the first pivot seat; the seat portion is pivoted to the first pivot seat and forms the second pivot point, and the second pivot point is coaxially or offset with the fourth pivot point.

[0021] In one embodiment, the handle frame includes 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.

[0022] In one embodiment, the handle frame further includes: a locking mechanism disposed in the second pivot seat, the locking mechanism having a locking state for limiting the relative rotation of the first handle frame and the second handle frame and a releasing state for allowing the first handle frame and the second handle frame to rotate relative to each other; and a releasing mechanism disposed on the handle frame and operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the releasing state.

[0023] In one embodiment, the second pivot seat includes 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 includes a locking piece and a locking recess, the locking piece is movably arranged on one of the fixed seat body and the pivot seat body, and the locking recess is formed on the other of the pivot seat body and the fixed seat body; when the locking mechanism is in the locked state, the locking piece is inserted into the locking recess, and when the locking mechanism is in the unlocked state, the locking piece withdraws from the locking recess.

[0024] In one embodiment, the release mechanism includes: a driving wheel, rotatably disposed on the first handle frame; a traction member, connected between the driving wheel and the locking member; and a first operating member, movably disposed on the first handle frame and connected to the driving wheel, the first operating member having a first locking position and a first release position, when the first operating member moves from the first locking position to the first release 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 release state through the traction member.

[0025] In one embodiment, the release mechanism further includes: a second operating member, pivotally connected to the handlebar frame and having a locking portion and an operable operating portion, the second operating member being pivotable between a second locking position and a second release 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 limit movement of the first operating member; when the second operating member is located at the first release position, the locking portion deviates from the moving path of the first operating member to allow movement of the first operating member.

[0026] In one embodiment, the release mechanism further includes: a first restoring member abutting against the second operating member and used to bias the operating portion so that the second operating member is constantly pivoted toward the second locking position.

[0027] In one embodiment, the release mechanism also includes: a first mounting seat, connected to the first handle frame and having a accommodating cavity, the first mounting seat having a first opening passing through the bottom wall of the accommodating cavity and a second opening passing through the side wall of the accommodating cavity, the first operating member being accommodated in the accommodating cavity, and at least when the first operating member is located at the first locking position, at least a portion of the first operating member extends out of the accommodating cavity through the first opening, the locking portion of the second operating member being accommodated in the accommodating cavity, and at least when the second operating member is located at the second locking position, at least a portion of the operating portion extends out of the accommodating cavity through the second opening.

[0028] In one embodiment, the release mechanism also includes: a second mounting seat, connected to the first handle frame and at least partially accommodated in the accommodating cavity of the first mounting seat, and the driving wheel is rotatably mounted on the second mounting seat; and a first reset member, at least partially accommodated in the accommodating cavity, one end of the first reset member is abutted against the operating part of the second operating member, and the other end of the first reset member is abutted against the second mounting seat.

[0029] In one embodiment, the driving assembly is pivotally connected to the wheel frame 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 four-bar structure is used to enable the frame body to switch between the expanded state and the folded state.

[0030] According to one aspect of the present application, a child stroller is provided, 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 so that the frame body can switch between an expanded state and a folded state; a basket rod assembly, pivotally connected to the wheel frame and having an extended state and a folded state; and a folding mechanism, comprising a drive assembly and a linkage component, the drive assembly being pivotally connected between the handle frame and the wheel frame, and movably connected to the basket rod assembly through the linkage component; when the frame body switches between the expanded state and the folded state, the drive assembly pivots relative to the wheel frame or the handle frame and drives the basket rod assembly to switch between the extended state and the folded state through the linkage component.

[0031] In one embodiment, the linkage component is pivotally connected to the basket rod assembly and the drive assembly respectively, and when the drive assembly pivots relative to the wheel frame or the rider frame, the linkage component pivots relative to the drive assembly to allow the basket rod assembly to switch between the extended state and the folded state.

[0032] In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame; the basket rod assembly includes 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 drive 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; or, the drive 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.

[0033] In one embodiment, the front tube body includes a first tube segment and a second tube segment which are 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.

[0034] In one embodiment, when the basket rod assembly is in the extended state, the angle between the first tube segment and the rear tube body is substantially 180 degrees; when the basket rod assembly is in the folded state, the angle between the first tube segment and the rear tube body is an acute angle or substantially 0 degrees.

[0035] In one embodiment, 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.

[0036] In one embodiment, the drive assembly has a first drive section and a second drive section, the first drive section is pivotally connected to the rider frame, the second drive section is pivotally connected to the linkage component, and the second rotation point is located between the first drive section and the second drive section.

[0037] In one embodiment, 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.

[0038] In one embodiment, the driving assembly is pivotally connected to the rear wheel frame and the rider frame, and is movably connected to the rear tube body through the linkage component, and the pivot point between the linkage component and the rear tube body is located between the fifth rotation point and the eighth pivot point; or, the driving assembly is pivotally connected to the front wheel frame and the rider frame, and is movably connected to the front tube body through the linkage component, and the pivot point between the linkage component and the front tube body is located between the fifth rotation point and the seventh pivot point.

[0039] In one embodiment, the driving assembly is provided with a stop portion, and when the basket rod assembly is in the extended state, the stop portion 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.

[0040] In one embodiment, the driving assembly is pivotally connected to the wheel frame at a second rotation point, and the stop portion is disposed at a second driving section of the driving assembly close to the linkage component and is located on a side of the driving assembly relatively close to the rider frame.

[0041] In one embodiment, the child stroller further comprises a folding auxiliary component, wherein the folding auxiliary component is connected to the basket rod assembly, so as to allow the basket rod assembly to be driven to switch to the folded state by operating the folding auxiliary component.

[0042] In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame; the basket rod assembly includes 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 folding auxiliary component is connected to the rear tube body, and the connection point between the two is located between the eighth pivot point and the fifth rotation point; or, the folding auxiliary component is connected to the front tube body, and the connection point between the two is located between the seventh pivot point and the fifth rotation point; or, the folding auxiliary component is connected to the fifth rotation point.

[0043] In one embodiment, the child stroller also includes: a first pivot seat, the wheel frame and the handle frame are coaxially pivoted at a fourth pivot point through the first pivot seat; and a seat assembly, which is 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 drive assembly drives the seat assembly to rotate relative to the first pivot seat to avoid interfering with the folding process of the basket rod assembly.

[0044] In one of the embodiments, during the folding process of the frame body, the seat assembly is parallel to at least a portion of the basket rod assembly.

[0045] In one embodiment, the drive assembly and the wheel frame are pivoted at a second rotation point; the seat assembly and the first pivot seat are pivoted at a second pivot point, and the seat assembly and the drive assembly are pivoted at a seventh rotation point, and the seventh rotation point is located on the side of the second rotation point away from the linkage component.

[0046] In one embodiment, the seat assembly includes a seat tube assembly and a seat plate, the seat tube assembly is pivotally connected between the first pivot seat and the driving assembly, and the seat plate is mounted on the seat tube assembly.

[0047] In one embodiment, the seat assembly further includes a support rod, which is arranged on the seat tube assembly and located on the side of the seat plate facing the basket rod assembly, and the support rod is spaced apart from the seat plate to form a through passage; the child stroller further includes a folding auxiliary component, which is connected to the basket rod assembly and passes through the through passage to allow the basket rod assembly to be driven to switch to the folded state by operating the folding auxiliary component.

[0048] 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 rider frame are coaxially pivoted at the fourth pivot point through the first pivot seat.

[0049] In one embodiment, the handle frame includes 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 first driving section of the drive assembly is pivotally connected to the first handle frame.

[0050] In one embodiment, the child stroller further includes: a locking mechanism, which is arranged in the second pivot seat, and the locking mechanism has a locking state that limits the relative rotation of the first handle frame and the second handle frame, and a releasing state that allows the first handle frame and the second handle frame to rotate relative to each other; and a releasing mechanism, which is arranged on the first handle frame or the second handle frame and is operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the releasing state.

[0051] In one embodiment, the driving assembly is pivotally connected to the wheel frame 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 four-bar structure is used to enable the frame body to switch between the expanded state and the folded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0055] Figure 1A three-dimensional diagram of a child stroller in one embodiment of the present application;

[0056] Figure 2 for Figure 1 A perspective view of the stroller from another perspective;

[0057] Figure 3 for Figure 1 A perspective view of the child stroller from another perspective;

[0058] Figure 4 for Figure 3 A magnified image of point A;

[0059] Figure 5 for Figure 3 The enlarged view of point B;

[0060] Figure 6 For along Figure 3 A cross-sectional view taken along line U1-U1, in which part of the seat structure is omitted;

[0061] Figure 7 for Figure 6 Enlarged view of point C;

[0062] Figure 8 for Figure 3 A schematic diagram of a portion of the structure of a handlebar frame in a child stroller shown;

[0063] Fig. 9 For along Figure 8 A cross-sectional view taken along line U2-U2, wherein the second operating member is in the second locking position and the first operating member is in the first locking position;

[0064] Fig.10 For along Figure 8 A cross-sectional view taken along line U2-U2, wherein the second operating member is in the second unlocking position, and the first operating member is in the first unlocking position;

[0065] Fig.11 For along Figure 8 A cross-sectional view of the U3-U3 line, with part of the structure of the driver's frame exploded;

[0066] Fig.12 for Fig.11 The enlarged view of point D in the middle;

[0067] Fig.13 For along Figure 3 A cross-sectional view along the U4-U4 line, wherein the frame body is in an unfolded state;

[0068] Fig.14 for Fig.13 The enlarged view of point E;

[0069] Fig.15 For along Figure 3 A cross-sectional view taken along line U4-U4, wherein the frame body is in a first transition state between an unfolded state and a folded state;

[0070] Fig.16 for Fig.15 The enlarged view of point F;

[0071] Fig.17 For along Figure 3 A cross-sectional view taken along line U4-U4, wherein the frame body is in a second transition state between the unfolded state and the folded state;

[0072] Fig.18 for Fig.17 The enlarged view of G;

[0073] Fig.19 for Figure 1 A side view of the child stroller when the frame body is in a folded state;

[0074] Fig. 20 for Figure 1 A three-dimensional view of the child stroller when the frame body is in a folded state;

[0075] Fig.21 is a three-dimensional diagram of a child stroller according to another embodiment of the present application;

[0076] Fig. 22 for Fig.21 A perspective view of the stroller from another perspective;

[0077] Fig.23 for Fig.21 A three-dimensional view of the stroller shown with the seat plate omitted;

[0078] Fig.24 for Fig.23 Enlarged view of H;

[0079] Fig.25 for Fig.23 A magnified view of point I;

[0080] Fig.26 For along Fig.21 A cross-sectional view taken along line U5-U5, wherein the stroller is in an unfolded state;

[0081] Fig. 27 for Fig.26 The enlarged view of J;

[0082] Fig.28 For along Fig.21 A cross-sectional view taken along line U5-U5, wherein the stroller is in a first transition state between the unfolded state and the folded state;

[0083] Fig.29for Fig.28 The enlarged view of K;

[0084] Fig.30 For along Fig.21 A sectional view taken along line U5-U5, wherein the stroller is in a second transition state between the unfolded state and the folded state;

[0085] Fig.31 for Fig.30 Enlarged view of L;

[0086] Fig.32 for Fig.21 A side view of the stroller shown in a folded state;

[0087] Fig.33 for Fig.21 A perspective view of the child stroller shown in a folded state;

[0088] Fig.34 For along Fig.21 Sectional view of line U6-U6;

[0089] Fig.35 for Fig.34 a perspective view of the stroller shown;

[0090] Fig.36 for Fig.21 The illustrated three-dimensional view of the child stroller when the seat plate is omitted, in which case the child stroller is provided with a folding auxiliary member;

[0091] Fig.37 For along Fig.21 A cross-sectional view taken along line U5-U5, in which the stroller is in an unfolded state and is provided with a folding auxiliary member;

[0092] Fig.38 for Fig.21 The stroller is a three-dimensional view showing a folded state, in which the stroller is provided with a folding auxiliary member. DETAILED DESCRIPTION

[0093] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0094] An embodiment of the present invention provides a child stroller 1000. The carrier can be detachably mounted on the child stroller 1000. It should be noted that the child stroller provided by the present invention can be applied to different objects according to the change of the carrier type. For example, when the carrier is a seat or a basket, the child stroller is suitable for infants and young children. When the carrier is a pet box, the child stroller can also be suitable for pets and used as a pet stroller.

[0095] Figures 1 to 3 A child stroller 1000 provided according to an embodiment of the present invention is shown. The overall structure of the child stroller 1000 is substantially bilaterally symmetrical, and may include a frame body 100, a seat assembly 200, and a folding mechanism 300. The frame body 100, the seat assembly 200, and the folding mechanism 300 will be described together with the child stroller 1000.

[0096] See also Figures 1 to 3 The frame body 100 of the child stroller 1000 may include 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 in an unfolded state (see Figure 1 and Figure 2 ) and folded state ( Fig.18 and Fig.19 ). Specifically, the wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 which are pivotally connected. The rider frame 120 includes a first push handle frame 121 and a second push handle frame 122 which are pivotally connected. The specific structures of the wheel frame 110 (including the front wheel frame 111 and the rear wheel frame 112) and the rider frame 120 (including the first push handle frame 121 and the second push handle frame 122) will be further described one by one below.

[0097] Continue to see Figures 1 to 3 In one embodiment, the front wheel frame 111 is, for example, a U-shaped structure, which includes front rods 1111 located on the left and right sides and a front crossbar 1112 connected between the two front rods 1111. The front crossbar 1112 extends substantially along the second direction F2, which is equivalent to the left and right direction. When a child sits on the seat assembly 200 of the stroller 1000, the front crossbar 1112 can also be used as a footrest.

[0098] In one embodiment, at least one front wheel seat 611 is installed at the bottom of the front wheel frame 111. Specifically, in this embodiment, Figures 1 to 3As shown, two front wheel seats 611 are installed at the bottom of the front wheel frame 111, and the two front wheel seats 611 are spaced apart in the left and right direction (i.e., the second direction F2). More specifically, the two front wheel seats 611 are installed at the left and right ends of the front cross bar 1112, and the two front rods 1111 are respectively connected to the front wheel seats 611 on the same side. Each front wheel seat 611 is used to install a front wheel 612 to make the child stroller 1000 movable, wherein the front wheel 612 can be a universal wheel or a non-universal wheel. Of course, in another alternative embodiment, the front wheel frame 111 can also have other embodiments, for example, the front wheel frame 111 only includes two front rods 1111, one end of the two front rods 1111 is connected to form a V-shaped structure, and a front wheel seat 611 can be centrally installed at the bottom of the front wheel frame 111. Alternatively, for example, the front wheel frame 111 only includes two front rods 1111 arranged in parallel along the left-right direction, and the two front wheel seats 611 are respectively connected to the two front rods 1111 .

[0099] It should be noted that, unless otherwise clearly specified and limited, the directional terms such as "left" and "right" of the child stroller 1000 in various embodiments of the present invention are based on the "left" and "right" directions of the child stroller 1000 in normal travel, and the "left" and "right" directions are schematically shown by arrows L and R in the figures. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the protection scope of the present invention.

[0100] See also Figures 1 to 3 , the rear wheel frame 112 is, for example, a U-shaped structure, which includes two rear rods 1121 located on the left and right sides and a rear cross bar 1122 connected between the two rear rods 1121, and the rear cross bar 1122 extends along the second direction F2. At least one rear wheel seat 621 is installed at the bottom of the rear wheel frame 112. Specifically, in this embodiment, two rear wheel seats 621 are installed at the bottom of the rear wheel frame 112, and the two rear wheel seats 621 are spaced apart in the left and right directions (i.e., the second direction F2). More specifically, the two rear wheel seats 621 are installed at the left and right ends of the rear cross bar 1122, and the two rear rods 1121 are respectively connected to the rear wheel seats 621 on the same side. Each rear wheel seat 621 is used to install a rear wheel 622, wherein the rear wheel 622 can also be a universal wheel or a non-universal wheel, for example. In this embodiment, the size of the rear wheel 622 is larger than the size of the front wheel 612, so that the overall structure of the child stroller 1000 is more stable. Of course, in another alternative embodiment, the size of the rear wheel 622 may be the same as or smaller than the size of the front wheel 612 .

[0101] Alternatively, in another alternative embodiment, the rear wheel frame 112 may have other implementations, for example, the rear wheel frame 112 only includes two rear rods 1121, one end of the two rear rods 1121 is connected to form a V-shaped structure, and a rear wheel seat 621 may be centrally installed at the bottom of the rear wheel frame 112. Alternatively, for example, the rear wheel frame 112 only includes two rear rods 1121 arranged in parallel along the left-right direction, and the two rear wheel seats 621 are respectively connected to the two rear rods 1121.

[0102] See also Figures 3 to 5 In one embodiment, the frame body 100 further includes a first pivot seat 130. Specifically, the first pivot seat 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 seat 130, so that the front wheel frame 111 can rotate around the fourth pivot point A4 relative to the rear wheel frame 112. Specifically, the upper ends of the two rear rods 1121 are pivotally connected to the upper ends of the front rods 1111 on the same side, for example, respectively through the first pivot seat 130, that is, the rear rods 1121 on the same side can rotate relative to the front rods 1111 on the same side around the fourth pivot point A4 of the corresponding first pivot seat 130. In this way, the volume of the wheel frame 110 can be changed so that the frame body 100 can be switched between the unfolded state and the folded state. More specifically, as Figure 4 and Figure 5 As shown, the first pivot seat 130 includes a first seat body 131 and a second seat body 132, which are stacked and coaxially pivoted around a fourth pivot point A4. The connecting portion of the first seat body 131 is connected to the front rod 1111, and the connecting portion of the second seat body 132 is connected to the rear rod 1121.

[0103] See also Figures 3 to 5In one embodiment, the rider frame 120 can be pivotally connected to the wheel frame 110 through the first pivot seat 130, and can rotate around the fourth pivot point A4. Specifically, the first pivot seat 130 also includes a third seat body 133. The third seat body 133 is stacked with the second seat body 132 and the first seat body 131, and the three can coaxially pivot around the fourth pivot point A4. Specifically, the connecting portion of the third seat body 133 is connected to the rider frame 120. More specifically, the rider frame 120 can include, for example, a first push handle frame 121 and a second push handle frame 122 pivotally connected to each other. Among them, one end of the second push handle frame 122 away from the first push handle frame 121 is connected to the third seat body 133 of the first pivot seat 130, which is equivalent to the second push handle frame 122, the front wheel frame 111 and the rear wheel frame 112 being coaxially pivotally connected at the fourth pivot point A4. In this way, the folding of the frame body 100 can be achieved by pivoting, so that the frame body 100 can be switched between the unfolded state and the folded state. More specifically, the first handle frame 121 is, for example, a U-shaped structure, which includes two first support rods 1212 and a handle bar 1213 connected between the two first support rods 1212. The handle bar 1213 extends along the second direction F2 and is used for the user to hold to push the child stroller 1000. More specifically, the second handle frame 122 includes, for example, two second support rods 1221, the upper ends of the two second support rods 1221 are, for example, respectively pivoted to the first support rods 1212 on the same side, and the lower ends of the two second support rods 1221 are, for example, respectively connected to the third seat body 133 of the first pivot seat 130 on the same side.

[0104] See also Figures 1 to 3 In one embodiment, the handlebar frame 120 may further include a second pivot seat 123, and the second pivot seat 123 has a fifth pivot point A5. The first push handle frame 121 and the second push handle frame 122 are pivotally connected at the fifth pivot point A5 through the second pivot seat 123, which is equivalent to the first support rod 1212 on the same side and the second support rod 1221 on the same side being pivotally connected through the second pivot seat 123, and the first support rod 1212 can rotate relative to the second support rod 1221 around the fifth pivot point A5. Specifically, Figure 6 As shown, the second pivot seat 123 may include, for example, a fixed seat body 1231 and a pivot seat body 1232. The fixed seat body 1231 and the pivot seat body 1232 can coaxially pivot about the fifth pivot point A5. Among them, one of the fixed seat body 1231 and the pivot seat body 1232 is connected to the first push handle frame 121, and the other is connected to the second push handle frame 122. Specifically, in this embodiment, the connecting portion of the fixed seat body 1231 is connected to the second push handle frame 122, and the connecting portion of the pivot seat body 1232 is connected to the first push handle frame 121.

[0105] In order to prevent the first handle frame 121 from rotating relative to the second handle frame 122 at will, in one embodiment, Figure 3 and Figure 6 As shown, the handle frame 120 also includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is arranged in the second pivot seat 123, and the locking mechanism 124 has a locking state that limits the relative rotation of the first handle frame 121 and the second handle frame 122, and a release state that allows the first handle frame 121 and the second handle frame 122 to rotate relative to each other. The release mechanism 125 is arranged on the handle frame 120, such as the first handle frame 121 or the second handle frame 122. The following will take the release mechanism 125 arranged on the first handle frame 121 as an example to illustrate its working principle. Specifically, the release mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locking state and the release state, which is equivalent to allowing or limiting the first handle frame 121 and the second handle frame 122 to rotate relative to each other.

[0106] Specifically, in this embodiment, when the frame body 100 is in the unfolded state, the first handle frame 121 is substantially parallel to the second handle frame 122, that is, the first handle frame 121 and the second handle frame 122 are in the same plane, and the angle α3 between the first handle frame 121 and the second handle frame 122 is 180 degrees (see Figure 3 The locking mechanism 124 can limit the relative rotation of the first push handle frame 121 and the second push handle frame 122 to keep the first push handle frame 121 and the second push handle frame 122 in the same plane. When the frame body 100 is in the folded state, the angle α3 between the first push handle frame 121 and the second push handle frame 122 is an acute angle (see Fig.19 ) or tends to 0 degrees. Of course, in another alternative embodiment, when the frame body 100 is in the unfolded state, the angle α3 between the first handle frame 121 and the second handle frame 122 may also be an obtuse angle or an acute angle.

[0107] See also Figure 6 In one embodiment, the locking mechanism 124 includes a locking member 1241 and a locking recess 1242. The locking member 1241 is movably disposed in one of the fixed seat body 1231 and the pivoting seat body 1232, and the locking recess 1242 is formed in the other of the pivoting seat body 1232 and the fixed seat body 1231. Specifically, in this embodiment, the locking member 1241 is movably disposed in the pivoting seat body 1232, and the locking recess 1242 is formed on the fixed seat 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 pivoting seat body 1232 from rotating relative to the fixed seat body 1231. When the locking mechanism 124 is in an unlocked state, the locking member 1241 retreats from the locking recess 1242 to allow the pivoting seat body 1232 to move relative to the fixed seat body 1231.

[0108] See also Figures 8 to 12In one embodiment, the release mechanism 125 includes a driving wheel 1251, a traction member 1252 and a first operating member 1253. The driving wheel 1251 is rotatably disposed on the first handle frame 121. The traction member 1252 is connected between the driving wheel 1251 and the locking member 1241. The first operating member 1253 is movably disposed on the first handle frame 121 and connected to the driving wheel 1251. Specifically, the first operating member 1253 has a first locking position and a first release position. When the first operating member 1253 moves from the first locking position to the first release position, the first operating member 1253 drives the driving wheel 1251 to rotate, and the driving wheel 1251 drives the locking mechanism 124 to switch from the locked state to the released state by driving the traction member 1252 to move; in other words, the rotation of the driving wheel 1251 drives the traction member 1252 to move, and then drives the locking member 1241 to withdraw from the locking recess 1242. More specifically, the traction member 1252 may be, for example, a traction rope, one end of which is connected to the driving wheel 1251 , and the other end of which is connected to the locking member 1241 .

[0109] It should be noted that the driving wheel 1251 can be directly connected to the first handle frame 121, or indirectly connected to the first handle frame 121. In this embodiment, the driving wheel 1251 is indirectly connected to the first handle frame 121, for example, it is connected to the first handle frame 121 through the second mounting seat 1257 described below.

[0110] See also Figures 9 to 12 In this embodiment, the handle bar 1213 of the first handle frame 121 has a cavity 1214 inside, that is, the handle bar 1213 can be regarded as a hollow tube. The wall of the handle bar 1213 is provided with a mounting opening connected to the cavity 1214. Specifically, a second mounting seat 1257 is installed in the cavity 1214, and the driving wheel 1251 is installed on the second mounting seat 1257 through the first rotating shaft 1258. More specifically, as Fig.12 As shown, the driving wheel 1251 is provided with a first connection portion 12511, and the first connection portion 12511 is staggered with the first rotating shaft 1258, and the first operating member 1253 has a second connection portion 12531, and the first connection portion 12511 and the second connection portion 12531 are connected by concave-convex matching. For example, the first connection portion 12511 can be a connecting column, and the second connection portion 12531 can be a sleeve, and the sleeve is sleeved outside the connecting column to enable the first operating member 1253 to be movably connected with the driving wheel 1251. When the first operating member 1253 is pushed, the first operating member 1253 will drive the driving wheel 1251 to rotate around the first rotating shaft 1258.

[0111] See also Fig. 9 , Fig.10 and Fig.12In this embodiment, the release mechanism 125 further includes a first mounting seat 1256. The first mounting seat 1256 is connected to the first push handle frame 121 and has a receiving cavity 12561. Specifically, the first mounting seat 1256 is installed at the mounting opening of the push handle rod 1213, and the first mounting seat 1256 has a third opening 12564 that passes through the top wall of the receiving cavity 12561. The receiving cavity 12561 can be communicated with the cavity 1214 of the push handle rod 1213 through the third opening 12564 and the mounting opening. Further, the first mounting seat 1256 also has a first opening 12562 that passes through the bottom wall of the receiving cavity 12561. The first operating member 1253 is accommodated in the receiving cavity 12561, and the second connecting portion 12531 of the first operating member 1253 passes through the third opening 12564 and the mounting opening to be connected to the first connecting portion 12511 of the driving wheel 1251. When the first operating member 1253 is located at the first locking position, at least a portion of the first operating member 1253 extends out of the accommodating cavity 12561 through the first opening 12562 (see Figure 8 and Fig. 9 In this way, the user can control the driving wheel 1251 to rotate by pushing the portion of the first operating member 1253 protruding from the accommodating cavity 12561, thereby releasing the lock.

[0112] See also Figure 6 In one embodiment, the lock release mechanism 125 further includes a second reset member 1259. The second reset member 1259 abuts against the locking member 1241 and is used to drive the locking member 1241 to reset so that the locking member 1241 remains in the locked state.

[0113] See also Figures 8 to 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 handlebar frame 120 and has a locking portion 12542 and an operable operating portion 12541. The second operating member 1254 is pivotable between a second locking position and a second unlocking position. When the second operating member 1254 is located at the second locking position, the locking portion 12542 is located on the moving 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 deviates 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 accidentally touching the first operating member 1253, thereby preventing the frame body 100 from folding.

[0114] Specifically, in this embodiment, Fig. 9 and Fig.10As shown, the first mounting seat 1256 also has a second opening 12563 that penetrates the side wall of the accommodating cavity. The locking portion 12542 of the second operating member 1254 is accommodated in the accommodating cavity 12561, and at least when the second operating member 1254 is in the second locking position, at least a portion of the operating portion 12541 extends out of the accommodating cavity 12561 through the second opening 12563. More specifically, the second operating member 1254 is connected to the second rotating shaft 1260 (see Fig.12 ) is pivotally connected to the first mounting seat 1256, and the pivot point is located between the locking portion 12542 and the operating portion 12541. In this way, the second operating member 1254 roughly forms a "seesaw" structure when pivoting on the first mounting seat 1256 (see Fig. 9 and Fig.10 ), when the operating portion 12541 is pressed, the locking portion 12542 is tilted and deviates from the moving path of the first operating member 1253.

[0115] See also Fig. 9 , Fig.10 as well as Fig.12 In one embodiment, the release mechanism 125 further includes a first reset member 1255. The first reset member 1255 abuts against the second operating member 1254 and is used to bias the operating portion 12541 to make the second operating member 1254 pivot to the second locking position. Specifically, the first reset member 1255 is accommodated in the accommodating cavity 12561, one end of which abuts against the second operating member 1254, specifically against the operating portion 12541, and the other end abuts against the second mounting seat 1257. In this way, when the user needs to unlock the first handle frame 121 and the second handle frame 122, the user can first press the operating portion 12541 of the second operating member 1254 to make the locking portion 12542 tilt up and deviate from the moving path of the first operating member 1253; then press the first operating member 1253 upward to make it push the driving wheel 1251 to rotate, and the locking member 1241 is moved out of the locking recess 1242 under the drive of the traction member 1252. At this time, the user can rotate the first handle frame 121 at will.

[0116] See also Figure 3 and Figure 4 ,as well as Fig.13 and Fig.14In one embodiment, the seat assembly 200 may include a seat portion 210 and a backrest portion 220, wherein 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 pivotally connected to 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 colinear or parallel to the fourth pivot axis A4. More specifically, in this embodiment, the second pivot axis A2 is colinear with the fourth pivot axis A4. When the backrest portion 220 and the seat portion 210 are arranged at an angle for a child to sit on, the seat portion 210 is configured to support the lower body (buttocks) of the child, and the backrest portion 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 is pivotally connected to the frame body 100 to form a second pivot point A2 . The seat plate 212 is installed on the seat tube 211 to support the buttocks of a child.

[0117] Furthermore, in one embodiment, the seat assembly 200 may also include a flexible cloth cover (not shown in the figure), which may be a single layer or a multi-layer structure. When the flexible cloth cover is a multi-layer structure, a cushioning material such as cotton, foam, etc. is provided between each two layers. In this way, when the flexible cloth cover is provided outside the seat portion 210 and the backrest portion 220, it can not only improve the appearance of the seat assembly 200, but also enhance the comfort of the child when riding. In one embodiment, a tie belt (not shown in the figure) is also provided on the handlebar 120. Specifically, the two ends of the tie belt are respectively connected to the second support rods 1221 located on the left and right sides, and the tie belt is used to be tied to the middle of the backrest portion 220 or one end of the middle away from the first pivot point A1. In this way, the backrest portion 220 can be supported, and when the child sits on the seat plate, the back can lean on the backrest portion 220 to improve the comfort of riding. Further, the length of the tie belt is adjustable. In this way, the user can indirectly adjust the tilt angle of the backrest portion 220 relative to the seat portion 210 by adjusting the length of the tightening belt.

[0118] In this embodiment, the flexible cloth cover arranged outside the backrest portion 220 is connected to the second push handle frame 122, and the tightening belt passes through the flexible cloth cover and is connected to the second support rods 1221 on both sides; in other words, the area outside the end of the tightening belt is passed through the flexible cloth cover and is located behind the backrest portion 220.

[0119] It should be noted that, unless otherwise clearly specified and limited, the directional terms such as "front" and "rear" of the child stroller in various embodiments of the present invention are based on the "front" and "rear" directions of the child stroller in normal travel, and the "front" and "rear" directions are schematically shown by arrows B and P in the figures. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the scope of protection of the present invention.

[0120] See also Figure 3 , Figure 4 , Fig.13 as well as Fig.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 frame 120 and the wheel frame 110, and the linkage 320 is pivotally connected to the driving assembly 310 and the seat portion 210, respectively. Figures 13 to 19 ), the driving assembly 310 pivots relative to the wheel frame 110 or the rider frame 120 and drives the first pivot point A1 of the seat portion 210 to rotate upward along the first turning point W around the second pivot point A2 through the linkage 320, thereby driving the seat assembly 200 to fold.

[0121] See also Fig.13 as well as Fig.14In one embodiment, the driving assembly 310 includes a driving member 311 and a rotating member 312. The driving member 311 is pivoted between the rider frame 120 and the rear wheel frame 112. One end of the rotating member 312 is pivoted to the front wheel frame 111, and the other end is pivoted 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 member 311 pivots relative to the rear wheel frame 112, the first rotation point B1 is displaced in the first direction F1, and drives the rotating member 312 to rotate relative to the front wheel frame 111, so that the front wheel frame 111 pivots relative to the rear wheel frame 112. Further, the first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted 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 around the second pivot point A2. Specifically, the linkage member 320 is pivotally connected to the seat portion 210 at the third pivot point A3 (or the third pivot axis), and the third pivot point A3 is located on the side of the second pivot point A2 close to the first pivot point A1. In this way, when the driving member 311 rotates counterclockwise around the second pivot point B2, the linkage member 320 can move upward along the first direction F1 relative to the wheel frame 110 as a whole (that is, the third pivot point A3 can be displaced upward along the first direction F1), so that the third pivot point A3 can rotate upward along the first turning point W around the second pivot point A2 (that is, the seat portion 210 can rotate clockwise around the second pivot point A2), thereby realizing the folding of the seat portion 210. More specifically, in this embodiment, the third pivot point A3 is coaxially arranged with the first pivot point A1. In this way, the lever arm can be increased, so that the seat portion 210 and the backrest portion 220 are easier to bend and fold (the specific bending process can be seen below).

[0122] Furthermore, if Figure 4 , Figure 5 and Figure 7 As shown, the driving assembly 310 further includes a transmission member 313, which 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 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. Fig.13 and Fig.14In one 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. One end of the rotating 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 around the second rotation point B2, the driving member 311 drives the rotating member 312 to rotate around the third rotation point B3 through the first rotation point B1, and drives the transmission member 313 to rotate around the second rotation point B2, so as to drive the linkage member 320 to move as a whole relative to the frame body 100, so that the first pivot point A1 of the seat portion 210 rotates around the second pivot point A2.

[0123] In other embodiments not shown, the driving assembly 310 includes a driving member 311 and a transmission member 313. The driving member 311 is pivoted between the rider frame 120 and the wheel frame 110, and the transmission member 313 is arranged on the driving member 311. The second end of the linkage member 320 is pivoted to the transmission member 313, and the first end of the linkage member 320 is pivoted to the seat portion 210. When the frame body 100 switches from the unfolded state to the folded state, the driving member 311 drives the transmission member 313 to pivot relative to the wheel frame 110, and the transmission member 313 drives the linkage member 320 to move, so that the first pivot point A1 of the seat portion 210 rotates upward around the second pivot point A2 along the first turning point W. Among them, the transmission member 313 is pivoted to the front wheel frame 111 of the wheel frame 110, and the rotating member 312 may not be arranged between the transmission member 313 and the rear wheel frame 112. When the frame body 100 switches from the unfolded state to the folded state, the rear wheel frame 112 may also be driven by other driving structures to pivot relative to the front wheel frame 111 , which is not limited in the present application.

[0124] See also Figure 1 and Fig.13 In this embodiment, the driving member 311 is pivoted between the first handle frame 121 and the rear wheel frame 112. Specifically, the end of the first handle frame 121 close to the second handle frame 122 has a push portion 1211. The driving member 311 is pivoted between the push portion 1211 and the rear wheel frame 112, and a fourth rotation point B4 (or a fourth rotation axis) is formed on the push portion 1211. In this way, 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. Through this four-bar structure, the frame body 100 can be switched between the unfolded state and the folded state. At the same time, when the frame body 100 switches between the unfolded state and the folded state, the unfolding and folding of the seat assembly 200 can be achieved through components such as the driving member 311, the transmission member 313, and the linkage member 320.

[0125] It should be noted that the rods of the "four-bar structure" mainly include the second push handle frame 122, the push portion 1211, the driving member 311 and a part of the frame of the rear wheel frame 112. Specifically, when the first push handle frame 121 and the second push handle frame 122 are bent around the fifth pivot point A5, the push portion 1211 will push the driving member 311 to rotate counterclockwise around the second rotation point B2. At the same time, the second push handle frame 122 can also rotate counterclockwise around the fourth pivot point A4 relative to the first pivot seat 130, so that the second push handle frame 122 gradually approaches the rear wheel frame 112, completing the folding of the frame body 100.

[0126] Specifically, Figures 13 to 16 As shown, the transmission member 313 is arranged on the driving member 311, and when the first handle frame 121 is bent relative to the second handle frame 122 to fold the handle frame 120, the driving member 311 will rotate counterclockwise around the second rotation point B2 under the drive of the push portion 1211. During this rotation process, the first rotation point B1 moves upward along the first direction F1, so that the rotating member 312 rotates clockwise around the first rotation point B3, and at the same time drives the transmission member 313 to rotate counterclockwise around the second rotation point B2. In this way, the linkage member 320 will move upward along the first direction F1 relative to the frame body 100 as a whole. Therefore, the first pivot point A1 of the seat portion 210 will rotate upward along the first turning point W around the second pivot point A2, which is equivalent to rotating the seat portion 210 around the second pivot point A2 in the clockwise direction. At the same time, according to the above, when the first handle frame 121 is bent relative to the second handle frame 122, the second handle frame 122 will rotate counterclockwise around the first pivot seat 130 to approach the rear wheel frame 122. Since the backrest portion 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122 will drive the backrest portion 220 to rotate counterclockwise around the first pivot point A1 during the process of approaching the rear wheel frame 122. It can be seen that during the folding process of the frame body 100, with the cooperation of the driving member 311, the transmission member 313 and the linkage member 320, the backrest portion 220 and the seat portion 210 can be bent downward around the first pivot point A1 respectively (that is, the backrest portion 220 rotates counterclockwise around the first pivot axis A1, and the seat portion 210 rotates clockwise around the first pivot axis A1). Since the first pivot point A1 gradually moves away from the ground during the bending process, the loose flexible cloth cover at the first pivot point A1 is not easy to contact the ground, thereby reducing the possibility of wear. Figures 17 to 19As shown, when the seat assembly 200 is folded, the seat portion 210 is located at the outermost side (frontmost side) along the front-rear direction of the child stroller 1000. Therefore, although the seat portion 210 has a relatively large size, the possibility of the seat portion 210 interfering with other structures (such as the handlebar frame 120) during the unfolding and folding process of the seat assembly 200 can be avoided, thereby improving the smoothness of the overall folding of the child stroller 1000. In addition, when the seat portion 210 is located at the outermost side, the flexible cloth cover accumulated at the pivotal connection between the seat portion 210 and the backrest portion 220 can be avoided from abutting against other structures, so that the volume of the child stroller 1000 after folding can be made smaller in the present application.

[0127] Optionally, in other alternative embodiments, when the linkage 320 pushes the first pivot point A1 to rotate clockwise around the second pivot point A2, even if the backrest portion 220 is not driven to rotate counterclockwise around the first pivot point A1 through the flexible cloth cover, the end of the backrest portion 220 away from the first pivot point A1 will still rotate counterclockwise relative to the first pivot point A1 under the action of gravity.

[0128] In one embodiment, the transmission member 313 is arranged at an angle to the driving member 311. The transmission member 313 is arranged on the side of the driving member 311 away from the seat assembly 200. In this way, the rotation radius of the linkage member 320 relative to the second rotation point B2 can be increased to increase the distance that the linkage member 320 moves upward substantially along the first direction F1, thereby ensuring that the seat assembly 200 can be completely folded.

[0129] Figures 13 to 19 The folding process of the frame body 100 is shown when the transmission member 313 is arranged on the driving member 311. Fig.13 and Fig.14 The frame body 100 is in an unfolded state; Fig.15 and Fig.16 The frame body 100 is in a first transition state between the unfolded state and the folded state; Fig.17 and Fig.18 The frame body 100 is in a second transition state between the unfolded state and the folded state; Fig.19The frame body 100 is in the folded state. Thus, when the frame body 100 in this embodiment needs to be folded, the second operating member 1254 and the first operating member 1253 are first operated (e.g., pressed) to put the locking mechanism 124 in the unlocked state. Subsequently, the first push handle frame 121 is rotated around the second pivot seat 123 (fifth pivot point A5) to be folded relative to the second push handle frame 122. During the rotation process, the push portion 1211 of the first push handle frame 121 pushes the driving member 311 downward, so that the driving member 311 rotates downward around the second rotation point B2 along the first turning point W, which is equivalent to rotating the driving member 311 in the counterclockwise direction around the second rotation point B2. When the driving member 311 rotates around the second rotation point B2, the driving member 311 drives the first rotation point B1 and the end of the rotating member 312 pivoted to the driving member 311 to move upward approximately along the first direction F1, so that the rotating member 312 rotates in the clockwise direction relative to the third rotation point B3, thereby changing the distance between the second rotation point B2 and the third rotation point B3, thereby causing the front wheel frame 111 to pivot relative to the rear wheel frame 112. In addition, the driving member 311 also drives the transmission member 313 to rotate in the counterclockwise direction around the second rotation point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upward approximately along the first direction F1, and such movement drives the first pivot point A1 to rotate in the clockwise direction around the second pivot point A2, thereby causing the seat portion 210 to fold. At the same time, when the first handle frame 121 rotates relative to the second handle frame 122 so that the push portion 1211 pushes the driving member 311 downward, the second handle frame 122 rotates around the first pivot seat 130 (the fourth pivot point A4) and gradually moves closer to the rear wheel frame 112 until the frame body 100 is folded to Fig.19 In the process of the second handle frame 122 gradually approaching the rear wheel frame 112, driven by the second handle frame 122 and the flexible cloth cover connected thereto, the backrest portion 220 rotates counterclockwise relative to the first pivot point A1, thereby folding the backrest portion 220. It can be seen that during the folding process of the frame body 100, with the cooperation of the driving member 311, the transmission member 313, and the linkage member 320, the backrest portion 220 and the seat portion 210 can be bent downward around the first pivot point A1 respectively, so as to complete the folding of the seat assembly 200 and the backrest portion 220.

[0130] See also Fig.14 and Fig.16 In one embodiment, the driving member 311 includes a first driving section 3111 and a second driving section 3112 connected to each other. The first driving section 3111 is pivotally connected to the handle frame 120, and specifically, the first driving section 3111 is pivotally connected to the push portion 1211 of the first handle frame 121 (see Fig.13); the second driving section 3112 is pivoted to the rear wheel frame 112 at the second rotation point B2, and the second driving section 3112 is pivoted to the rotating member 312 at the first rotation point B1. The transmission member 313 is connected to the second driving section 3112 and is arranged at an angle with the second driving section 3112. Specifically, the first driving section 3111 and the second driving section 3112 are arranged 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 angle α1 between the first driving section 3111 and the second driving section 3112 is arranged 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 angle α1 is arranged 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 counterclockwise around the second rotation point B2), it can more easily drive the first rotation point B1 to move upward, and quickly achieve the front wheel frame 111 to move closer 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 can be a right angle or an acute angle, which can be set specifically according to actual needs. It should be noted that the first driving section 3111 and the second driving section 3112 can be fixedly connected (such as integrally formed) or detachably connected (such as threaded connection, clamping). This application does not impose specific restrictions on this.

[0131] See also Fig.14 and Fig.16 In one embodiment, at least a portion of the transmission member 313 is located on the side of the opening of the second driving section 3112 away from the first angle α1. In this way, the length of the linkage member 320 is increased, and the force direction at the pivot point (i.e. A6) between the linkage member 320 and the transmission member 313 when the driving member 311 rotates is changed, and the rotation force arm of the linkage member 320 is increased, so that the rotation process of the seat part 210 around the second pivot point A2 is smoother. In addition, since the pivot point (i.e. A6) between the linkage member 320 and the transmission member 313 is eccentric relative to the second rotation point B2, that is, the pivot point A6 is set outside the straight line where the first rotation point B1 and the second rotation point B2 are located, the rotation radius of the linkage member 320 when rotating relative to the second rotation point B2 is increased, so that the distance when the linkage member 320 moves upward approximately along the first direction F1 is increased, thereby ensuring that the seat assembly 200 can be completely folded and improving the reliability of folding. In some embodiments, the transmission member 313 may be fixedly connected to the second driving section 3112, for example, the transmission member 313 may be integrally formed on the second driving section 3112. Of course, in other alternative embodiments, the transmission member 313 may be detachably connected to the second driving section 3112, for example, the transmission member 313 may be connected to the second driving section 3112 by fasteners such as screws. This application does not impose any specific limitation on this.

[0132] See also Fig.16 and Fig.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 stacked on the driving member 311 and is located between the first rotation point B1 and the second rotation point B2. The second segment 3132 is pivoted to the linkage member 320, and at least when the frame body 100 is in the unfolded state, the opening of the second angle α2 is set downward along the first direction F1. Specifically, the first segment 3131 is stacked and fixedly connected to the second driving segment 3112, and the opening of the second angle α2 is away from the opening of the first angle α1. More specifically, the linkage member 320 is pivoted to an end of the second segment 3132 away from the first segment 3131. Thus, when the transmission member 313 rotates around the second rotation point B2 together with the driving member 311, the linkage member 320 can be more easily driven to move upward or downward approximately along the first direction F1, so as to drive the seat assembly 200 to fold in the correct direction and avoid the "stuck" phenomenon.

[0133] Considering the above-mentioned frame body 100, seat assembly 200 and folding mechanism 300, we will now combine Figures 13 to 19 The use principle of the stroller 1000 will be described in detail.

[0134] See also Fig.13 and Fig.14 When the frame body 100 is in the unfolded state, the locking mechanism 124 is in the locked state (see Figure 6), therefore, the first handle frame 121 and the second handle frame 122 remain relatively fixed, that is, the push portion 1211 also remains relatively fixed. Since the second handle frame 122, the push portion 1211, the driving member 311 and the rear wheel frame 112 constitute a four-bar structure, when the first handle frame 121 and the second handle frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and cannot pivot, so that the second handle frame 122, the driving member 311 and the rear wheel frame 112 remain relatively fixed and cannot rotate relative to each other, and finally the frame body 100 can be stably maintained in the unfolded state. At the same time, since the driving member 311 is fixed, the transmission member 313 and the linkage member 320 are fixed, so that the seat portion 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 arranged at an angle, the rotating member 312 and the second driving section 3112 are approximately in the same horizontal plane, and the front wheel frame 111, the rear wheel frame 112 and the partial structure of the driving assembly 310 (for example, the second driving section 3112 and the rotating member 312) can be regarded as a triangular structure as a whole, so that the front wheel frame 111 and the rear wheel frame 112 can remain relatively fixed, so that the frame body 100 can be stably maintained in the unfolded state.

[0135] See also Figures 13 to 19 When the user needs to move the frame body 100 from the unfolded state (see Fig.13 and Fig.14 ) to the folded state (see Fig.18 and Fig.19) is switched, the locking mechanism 124 is switched to the unlocked state by pressing the unlocking mechanism 125. Specifically, the operating portion 12541 of the second operating member 1254 is pressed first to make the locking portion 12542 deviate from the moving path of the first operating member 1253, and then the driving wheel 1251 is pushed to rotate by pressing the first operating member 1253, so that the traction member 1252 can be driven to move and the locking member 1241 can be pulled away from the locking recess 1242. Subsequently, the first handle frame 121 is rotated in a clockwise direction around the second pivot seat 123 (the fifth pivot point A5) and folded relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the first driving section 3111 of the driving member 311 downward, so that the driving member 311 as a whole rotates in a counterclockwise direction around the second rotation point B2. 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 rotating member 312 to move upward, so that the rotating member 312 pivots in the clockwise direction around the third rotation point B3. In this way, this process reduces the distance between the second rotation point B2 and the third rotation point B3, so that the front wheel frame 111 and the rear wheel frame 112 are brought closer to each other, thereby realizing the folding of the frame body 100. In addition, during the rotation process, the second driving section 3112 will also drive the transmission member 313 to rotate counterclockwise relative to the second rotation point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upward approximately along the first direction F1, and this movement will drive the first pivot point A1 to rotate clockwise around the second pivot point A2, thereby driving the seat portion 210 to fold. During the folding process of the hand frame 120, the second push handle frame 122 will rotate counterclockwise around the first pivot seat 130 to approach the rear wheel frame 122, and the backrest portion 220 is connected to the second push handle frame 122 through the flexible cloth cover, therefore, the second push handle frame 122 will drive the backrest portion 220 to rotate counterclockwise around the first pivot point A1 during the process of approaching the rear wheel frame 122, thus achieving the folding of the backrest portion 220.

[0136] Of course, when the user needs to switch the frame body 100 from the folded state to the unfolded state, the first handle frame 121 is directly rotated counterclockwise around the second pivot seat 123 (fifth pivot point A5) until the first handle frame 121 and the second handle frame 122 are in the same plane. During the rotation process, the push portion 1211 of the first handle frame 121 pulls the first driving section 3111 of the driving member 311 upwards, so that the driving member 311 as a whole rotates clockwise around the second rotation point B2. 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 rotating member 312 to move downward, so that the rotating member 312 pivots counterclockwise around the third rotation point B3. Thus, this process will increase the distance between the second rotation point B2 and the third rotation point B3, so that the front wheel frame 111 and the rear wheel frame 112 move away from each other, thereby realizing the unfolding of the frame body 100. In addition, during the rotation process, the second driving section 3112 will also drive the transmission member 313 to rotate in the clockwise direction relative to the second rotation point B2, and the transmission member 313 will move approximately downward in the first direction F1 during this rotation process, so that the linkage member 320 can pivot relative to the transmission member 313 and move approximately downward in the first direction F1 together with the transmission member 313, so that the third pivot point of the seat portion 210 will be pulled downward, so that the seat portion 210 rotates in the counterclockwise direction around the second pivot point A2, and finally drives the seat portion 210 to unfold. During the unfolding of the handle frame 120, the second handle frame 122 will rotate in a clockwise direction around the first pivot seat 130 to move away from the rear wheel frame 122, and the backrest portion 220 is connected to the second handle frame 122 via a flexible cloth cover. Therefore, during the process of the second handle frame 122 moving away from the rear wheel frame 122, the backrest portion 220 will be driven to rotate in a clockwise direction around the first pivot point A1, thereby achieving the unfolding of the backrest portion 220.

[0137] According to the above description, in the child stroller 1000 of the present application, the seat portion 210 and the backrest portion 220 are pivoted to each other to form a first pivot point A1, and the seat portion 210 is pivoted to the first pivot seat 130 to form a second pivot point A2. The driving assembly 310 in the folding mechanism 300 is pivoted between the handle frame 120 and the wheel frame 110, and the linkage 320 is pivoted to the driving assembly 310 and the seat portion 210 respectively; in addition, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 can pivot relative to the wheel frame 110 or the handle frame 120 and drive the first pivot point A1 of the seat portion 210 to rotate upward around the second pivot point A2 through the linkage 320. Therefore, when the child stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 only needs to be pivoted relative to the wheel frame 110. Under the coordinated action of the driving assembly 310 and the linkage member 320, the first pivot point A1 of the seat portion 210 will rotate upward around the second pivot point A2, that is, the first pivot point A1 moves away from the ground. In addition, under the action of the second handle frame and the flexible cloth cover, the backrest portion 220 will rotate counterclockwise around the first pivot point A1 to move toward the ground. In other words, when the frame body 100 is folded, under the drive and linkage action of the folding mechanism 300, the backrest portion 220 and the seat portion 210 can be 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 the ground, thereby reducing the possibility of wear. At the same time, since the driving assembly 310 in the present application includes a transmission member 313, the transmission member 313 is arranged between the first rotation point B1 and the second rotation point B2 on the driving member 311, and is located on the side of the driving member 311 away from the angle α1, therefore, when the linkage member 320 is pivoted between the transmission member 313 and the seat portion 210, and when the frame body 100 is folded, the protruding transmission member 313 increases the length of the linkage member 320, and changes the force direction at the pivot point A6 of the linkage member 320 and the transmission member 313 when the driving member 311 rotates, thereby increasing the rotation force arm, so that the rotation process of the seat portion 210 around the second pivot point A2 is smoother. In addition, the protruding transmission member 313 also 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 upward approximately along the first direction F1 increases, thereby ensuring that the seat assembly 200 can be completely folded, and improving the reliability of the folding of the seat assembly 200. Furthermore, since the linkage member 320 is pivoted between the transmission member 313 and the seat portion 210, when the transmission member 313 drives the linkage member 320 to rotate so that the linkage member 320 moves upward or downward approximately along the first direction F1, the mutual pivoting manner can provide freedom of movement for the relative movement between the driving member 311 and the seat portion 210, thereby allowing the driving member 311 to drive the seat portion 210 to pivot when it rotates.

[0138] Optionally, in some alternative embodiments, the first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted to the rotating member 312. Specifically, the transmission member 313 is arranged at an angle with the rotating member 312, and is located on the side of the rotating member 312 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 move in the first direction F1, and drives the rotating member 312 to rotate relative to the front wheel frame 111. Therefore, when the second end of the linkage member 320 is pivoted to the rotating member 312, the linkage member 320 can still push the seat portion 210 to rotate around the second pivot axis A2. Further, the transmission member 313 is arranged on the rotating member 312, the first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted to the transmission member 313, that is, the second end of the linkage member 320 is pivoted to the rotating 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 .

[0139] When the frame body 100 switches from the unfolded state to the folded state, that is, when the first handle frame 121 is bent relative to the second handle frame 122 to fold the handle frame 120, the driving member 311 will rotate counterclockwise around the second rotation point B2 under the drive of the push portion 1211. During this rotation process, the first rotation point B1 moves upward along the first direction F1, so that the rotating member 312 rotates clockwise around the third rotation point B3, and then the transmission member 313 also rotates clockwise around the third rotation point B3. In this way, the linkage member 320 will move upward along the first direction F1 relative to the frame body 100 as a whole. Therefore, the first pivot point A1 of the seat portion 210 will rotate upward along the first turning point W around the second pivot point A2, which is equivalent to rotating the seat portion 210 around the second pivot point A2 in the clockwise direction to achieve the folding of the seat portion 210. When the frame body 100 switches from the folded state to the unfolded state, that is, when the first handle frame 121 is bent relative to the second handle frame 122 to unfold the handle frame 120, the driving member 311 will rotate clockwise around the second rotation point B2 under the drive of the push portion 1211. During this rotation process, the first rotation point B1 moves downward along the first direction F1, so that the rotating member 312 rotates counterclockwise around the third rotation point B3, and then the transmission member 313 also rotates counterclockwise around the third rotation point B3. In this way, the linkage member 320 will move downward along the first direction F1 relative to the frame body 100 as a whole. Therefore, the first pivot point A1 of the seat portion 210 will rotate downward along the first turning point W around the second pivot point A2, which is equivalent to rotating the seat portion 210 counterclockwise around the second pivot point A2 to achieve the unfolding of the seat portion 210. It can be seen that when the transmission member 313 is disposed on the rotating member 312, the seat assembly 200 can also be folded or unfolded along with the frame body 100. 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 in detail herein.

[0140] In the aforementioned child stroller 1000 , since the wheel frame 110 and the handle frame 120 in the frame body 100 are pivotally connected to each other, the frame body 100 has two states, an unfolded state and a folded state, and can be switched between the two states. Furthermore, since the seat portion 210 and the backrest portion 220 in 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 (for example, the first pivot seat 130) to form a second pivot point A2, the driving assembly 310 in the folding mechanism 300 is pivotally connected between the rider frame 120 and the wheel frame 110, and the linkage member 320 in the folding mechanism 300 is pivotally connected to the driving assembly 310 and the seat portion 210 respectively; in addition, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 can pivot relative to the wheel frame 110 or the rider frame 120 and drive the first pivot point A1 of the seat portion 210 to rotate upward around the second pivot point A2 through the linkage member 320. Therefore, when the child stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 only needs to be pivoted relative to the wheel frame 100, and under the coordinated action of the driving assembly 310 and the linkage member 320, the first pivot point A1 of the seat portion 210 will rotate upward around the second pivot point A2, that is, the first pivot point A1 moves away from the ground, so as to achieve the folding of the seat portion 210. Since the handle frame 120 will gradually approach the ground when the frame body 100 is folded, and the backrest portion 220 is connected to the handle frame 120 through the flexible cloth cover, therefore, during the folding process of the frame body 100, under the joint action of the flexible cloth cover, the backrest portion 220 will move downward around the first pivot point A1, that is, equivalent to moving the end of the backrest portion 220 away from the first pivot point A1 towards the ground, so that the folding of the backrest portion 220 can be achieved. It can be seen that when the frame body 100 is folded, the backrest portion 220 and the seat portion 210 are 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 the ground, thereby reducing the possibility of wear of the flexible cloth cover. Fig.19 ), the seat portion 210 is located at the outermost side (e.g., the frontmost side) along the front-rear direction of the child stroller 1000. Therefore, although the seat portion 210 has a large size, the possibility of the seat portion 210 interfering with other structures (such as the handlebar frame 120) during the unfolding and folding process of the seat assembly 200 can be avoided, thereby improving the smoothness of the overall folding of the child stroller 1000. In addition, when the seat portion 210 is located at the outermost side, it can also be avoided that the flexible cloth cover accumulated at the pivotal connection between the seat portion 210 and the backrest portion 220 is against other structures, so that the volume of the child stroller 1000 after folding can be made smaller in the present application.

[0141] The child stroller according to the embodiment of the present application can effectively prevent the loose cloth cover from contacting the ground when folded.

[0142] In the child stroller according to the present application, since the wheel frame and the handle frame in the frame body are pivotally connected to each other, the frame body has two states, an unfolded state and a folded state, and can be switched between the two. Furthermore, since the seat portion and the backrest portion in the seat assembly 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, the drive assembly in the folding mechanism is pivotally connected between the handle frame and the wheel frame, and the linkage is pivotally connected to the drive assembly and the seat portion respectively; in addition, when the frame body is switched from the unfolded state to the folded state, the drive assembly can pivot relative to the wheel frame or the handle frame and drive the first pivot point of the seat portion to rotate upward around the second pivot point through the linkage. Therefore, when the child stroller is placed on the ground and needs to be folded, the handle frame only needs to be pivoted relative to the wheel frame. Under the coordinated action of the driving assembly and the linkage, the first pivot point of the seat portion will rotate upward around the second pivot point, that is, the first pivot point moves in a direction away from the ground, so that the seat can be folded. In addition, during this process, the end of the backrest portion away from the first pivot point will move in a direction close to the ground. In other words, during the process of the seat portion pivoting around the second pivot point, the backrest portion and the seat portion will bend downward around the first pivot point respectively, so that the loose flexible cloth cover at the first pivot point is not easy to contact the ground, thereby reducing the possibility of wear.

[0143] Fig.21 and Fig. 22 FIG. 1 shows a child stroller 1000 provided according to another embodiment of the present application. The structure of the child stroller 1000 is substantially bilaterally symmetrical. The child stroller 1000 may include, for example, a frame body 100, a basket rod assembly 500, and a folding mechanism 300. 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 in an unfolded state (see FIG. 1 ). Fig.21 and Fig. 22 ) and folded state ( Fig.32 and Fig.33 The basket rod assembly 500 is pivotally connected to the wheel frame 110 and has an extended state (see Fig.21 and Fig. 22 ) and the collapsed state ( Fig.32 and Fig.33 ).

[0144] like Fig.23 and Fig.25As shown, the folding mechanism 300 includes a driving assembly 310 and a linkage component 330. The driving assembly 310 is pivoted between the rider frame 120 and the wheel frame 110, and is movably connected to the basket rod assembly 500 through the linkage component 330. The pivot point of the driving assembly 310 on the wheel frame 110 (specifically, the rear wheel frame 112) can be regarded as the second rotation point B2 (or the second rotation axis). In this embodiment, the linkage component 330 is pivoted to the basket rod assembly 500 and the driving assembly 310 respectively. When the frame body 100 switches between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linkage component 330 moves as a whole relative to the frame body 100 and pivots relative to the driving assembly 310, thereby driving the basket rod assembly 500 to switch between the extended state and the folded state. In another alternative embodiment, the linkage component 330 can be movably connected to the basket rod assembly 500 and movably connected to the driving assembly 310. When the frame body 100 switches between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linkage component 330 moves as a whole relative to the frame body 100 and drives the basket rod assembly 500 to rotate, thereby driving the basket rod assembly 500 to switch between the extended state and the folded state.

[0145] According to the child stroller 1000 and the child carrier provided by the embodiment of the present application, when the child stroller 1000 is folded, the driving assembly 310 directly drives the linkage component 330 to move as a whole relative to the frame body 100 by directly folding the frame body 100, thereby driving the basket rod assembly 500 to switch from the extended state to the folded state. In this way, not only the convenience of folding the child stroller 1000 is improved, but also the smoothness of folding the child stroller 1000 is improved.

[0146] The frame body 100 , the basket rod assembly 500 , and the folding mechanism 300 will be further described below one by one.

[0147] See also Figure 21 to Figure 23 In one embodiment, the frame body 100 may include a wheel frame 110 and a rider frame 120. The wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 which are pivotally connected. The rider frame 120 includes a first push handle frame 121 and a second push handle frame 122 which are pivotally connected.

[0148] The front wheel frame 111 is, for example, a U-shaped structure, which includes front rods 1111 located on the left and right sides and a front crossbar 1112 connected between the two front rods 1111. The front crossbar 1112 extends roughly along the second direction F2, which is equivalent to the left and right direction. At least one front wheel seat 611 is installed at the bottom of the front wheel frame 111. In this embodiment, two front wheel seats 611 are installed at the bottom of the front wheel frame 111, and the two front wheel seats 611 are spaced apart in the left and right direction (i.e., the second direction F2). The structure of the front wheel frame 111 in this embodiment is the same as the structure of the front wheel frame 111 in the above-mentioned embodiment. Therefore, regarding the specific structure and connection method of the front wheel frame 111, please refer to the above description, and the description will not be repeated here.

[0149] See also Figure 21 to Figure 23 , the rear wheel frame 112 is, for example, a U-shaped structure, which includes two rear rods 1121 located on the left and right sides and a rear cross bar 1122 connected between the two rear rods 1121, and the rear cross bar 1122 extends along the second direction F2. At least one rear wheel seat 621 is installed at the bottom of the rear wheel frame 112. In this embodiment, two rear wheel seats 621 are installed at the bottom of the rear wheel frame 112, and the two rear wheel seats 621 are spaced apart in the left and right direction (i.e., the second direction F2). The structure of the rear wheel frame 112 in this embodiment is the same as the structure of the rear wheel frame 112 in the above embodiment, so the specific structure and connection method of the rear wheel frame 112 can be referred to the above description, and will not be repeated here.

[0150] See also Figure 23 to Figure 25 The frame body 100 further includes a first pivot seat 130, the first pivot seat 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 seat 130, so that the front wheel frame 111 can rotate relative to the rear wheel frame 112 around the fourth pivot point A4. Specifically, the upper ends of the two rear rods 1121 are pivotally connected to the upper ends of the front rods 1111 on the same side through the first pivot seat 130, for example, respectively, which is equivalent to the rear rods 1121 on the same side being able to rotate relative to the front rods 1111 on the same side around the fourth pivot point A4 of the corresponding first pivot seat 130. In this way, the volume of the wheel frame 110 can be changed, so that the frame body 100 can be switched between the unfolded state and the folded state. More specifically, the first pivot seat 130 includes a first seat body 131 and a second seat body 132, which are stacked and coaxially pivoted around the fourth pivot point A4. The connecting portion of the first seat body 131 is connected to the front rod 1111, and the connecting portion of the second seat body 132 is connected to the rear rod 1121.

[0151] See also Figure 23 to Figure 25The driver frame 120 can be pivotally connected to the wheel frame 110 through the first pivot seat 130, and can rotate around the fourth pivot point A4. Specifically, the first pivot seat 130 also includes a third seat body 133. The third seat body 133 is stacked with the second seat body 132 and the first seat body 131, and the three can coaxially pivot around the fourth pivot point A4. The connecting portion of the third seat body 133 is connected to the driver frame 120.

[0152] See also Fig.21 and Fig. 22 The handlebar frame 120 may further include a second pivot seat 123, and the second pivot seat 123 has a fifth pivot point A5. The first push handle frame 121 and the second push handle frame 122 are pivoted at the fifth pivot point A5 through the second pivot seat 123, which is equivalent to the first support rod 1212 on the same side and the second support rod 1221 on the same side being pivoted through the second pivot seat 123, and the first support rod 1212 can rotate relative to the second support rod 1221 around the fifth pivot point A5. Specifically, the second pivot seat 123 includes a fixed seat body 1231 and a pivot seat body 1232.

[0153] The first pivot seat 130 and the second pivot seat 123 in this embodiment have the same structure as the first pivot seat 130 and the second pivot seat 123 in the above embodiment. Therefore, for the specific structure and connection method of the first pivot seat 130 and the second pivot seat 123, please refer to the above description and will not be repeated here.

[0154] See also Fig.26 , Fig.28 and Fig.30 In one embodiment, the first handle frame 121 has a push portion 1211 at the end close to the second handle frame 122, and the driving assembly 310 is pivoted between the push portion 1211 and the rear wheel frame 112, and a fourth rotation point B4 is formed on the push 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 through the four-bar structure. It should be noted that the rods of the "four-bar structure" mainly include the second handle frame 122, the push portion 1211, the first driving section 3111 of the driving assembly 310 and a part of the frame body of the rear wheel frame 112.

[0155] See also Fig.21 , Fig.34 and Fig.35In one embodiment, the frame body 100 further includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is disposed in the second pivot seat 123. The locking mechanism 124 has a locking state that limits the relative rotation of the first push handle frame 121 and the second push handle frame 122 and a release state that allows the first push handle frame 121 and the second push handle frame 122 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 the locking state and the release state. In this embodiment, when the frame body 100 is in the unfolded state, the first push handle frame 121 is substantially parallel to the second push handle frame 122, that is, the first push handle frame 121 and the second push handle frame 122 are in the same plane, and the angle α3 between the first push handle frame 121 and the second push handle frame 122 is 180 degrees. The locking mechanism 124 can limit the relative rotation of the first push handle frame 121 and the second push handle frame 122 to keep the first push handle frame 121 and the second push handle frame 122 in the same plane. When the frame body 100 is in the folded state, the angle α3 between the first push handle frame 121 and the second push handle frame 122 is an acute angle (see Fig.32 ) or tends to 0 degrees. Of course, in another alternative embodiment, when the frame body 100 is in the unfolded state, the angle α3 between the first handle frame 121 and the second handle frame 122 can be an obtuse angle or an acute angle.

[0156] See also Fig.34 and Fig.35 In one embodiment, the locking mechanism 124 includes a locking member 1241 and a locking recess 1242. The locking member 1241 is movably disposed in the pivoting seat body 1232, and the locking recess 1242 is formed on the fixed seat 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 pivoting seat body 1232 relative to the fixed seat body 1231. When the locking mechanism 124 is in an unlocked state, the locking member 1241 retreats from the locking recess 1242 to allow the pivoting seat body 1232 to rotate relative to the fixed seat body 1231.

[0157] Continue to see Fig.34 and Fig.35The release mechanism 125 is arranged on the first handle frame 121 or the second handle frame 122 and is operably connected to the locking mechanism 124. The release mechanism 125 is used to control the locking mechanism 124 to switch between the locked and unlocked states to limit or allow the relative rotation of the first handle frame 121 and the second handle frame 122. Specifically, the release mechanism 125 includes a release operating member 12510, a release rope 12520 and an elastic reset member 12530. Among them, one end of the release rope 12520 is connected to the release operating member 12510, and the other end is connected to the locking member 1241. In this way, when the release operating member 12510 is pressed, the locking member 1241 can be pulled to move away from the locking recess 1242 by the release rope 12520. The elastic reset member 12530 abuts against the abutting locking member 1241, and is used to drive the locking member 1241 to reset, so that the locking member 1241 remains in the locked state. Specifically, in this embodiment, the release mechanism 125 is disposed on the first handle frame 121. The release operating member 12510 is movably disposed on the first handle frame 121, more specifically, movably disposed on the handle bar 1213; the release rope 12520 is located in the handle bar 1213 and the first support rod 1212 and connected between the release operating member 12510 and the locking member 1241. Of course, in another alternative embodiment, the release operating member 12510 may also be disposed on the first support rod 1212 or the second support rod 1221, which is not specifically limited here.

[0158] Figure 26 to Figure 32 The folding process of the frame body 100 is shown. Fig.26 and Fig. 27 The child stroller 100 is in an unfolded state; Fig.28 and Fig.29 The child stroller 100 is in a first transition state between the unfolded state and the folded state; Fig.30 and Fig.31 The child stroller 100 is in a second transition state between the unfolded state and the folded state; Fig.32The child stroller 100 in the embodiment is in a folded state. When it is necessary to fold the child stroller 1000 or the frame body 100 in the present embodiment, the release mechanism 125 is operated (e.g., pressed) to put the locking mechanism 124 in a released state. Subsequently, the first handle frame 121 is rotated around the second pivot seat 123 (i.e., around the fifth pivot point A5) to be folded relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the drive assembly 310 downward, so that the drive assembly 310 rotates around the second rotation point B2 in the clockwise direction W2, thereby driving the linkage component 330 to move relative to the rear wheel frame and rotate relative to the drive assembly 310, thereby driving the basket rod assembly 500 to fold. In addition, the first handle frame 121 rotates relative to the second handle frame 122 so that the push portion 1211 pushes the driving assembly 310 downward, and the second handle frame 122 rotates around the first pivot seat 130 (i.e., around the fourth pivot point A4) and approaches the rear wheel frame 112 until the frame body 100 is folded to Fig.32 and Fig.33 The folded state.

[0159] See also Fig.23 and Fig.25 In one embodiment, the basket rod assembly 500 can be used to support or install a basket (not shown in the figure), so that the user can place some personal items in the basket to reduce the burden of carrying. Specifically, the basket rod assembly 500 may include a front tube body 510 and a rear tube body 520 that are pivotally connected. The front tube body 510 is pivotally connected to the front wheel frame 111 at the seventh pivot point (or the seventh pivot axis) A7, and is pivotally connected to the rear tube body 520 at the fifth rotation point (or the fifth rotation axis) B5. The rear tube body 520 is pivotally connected to the rear wheel frame 112 at the eighth pivot point (or the eighth pivot axis) A8. In this way, the basket rod assembly 500 can be folded by rotating the front tube body 510 around the seventh pivot point A7, the rear tube body 520 around the eighth pivot point A8, and the front tube body 510 relative to the rear tube body 520 around the fifth rotation point B5, so that it can be switched between the extended state and the folded state. The seventh pivot axis A7, the fifth rotation 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 are also parallel to each other.

[0160] Specifically, in this embodiment, Fig.23 and Fig.25 As shown, the front tube body 510 includes two front basket rods 513 spaced apart and arranged side by side. The first ends of the two front basket rods 513 are respectively pivotally connected to the front rod 1111 on the same side of the front wheel frame 111 at the seventh pivot point A7. The rear tube body 520 is a U-shaped structure, which includes two rear basket rods 521 located on the left and right sides and a connecting rod 522 connected between the two rear basket rods 521 (see Fig.35The two rear basket rods 521 are respectively pivoted to the rear rod 1121 on the same side of the rear wheel frame 112 at the eighth pivot point A8, and are respectively pivoted to the second end of the front basket rod 513 on the same side at the fifth rotation point B5. The left and right sides of the basket rod assembly 500 are respectively pivoted to the left and right sides of the frame body 100, so that the stability of the basket rod assembly 500 in supporting the basket can be improved.

[0161] In order to facilitate the rotation of the rear tube body 520 relative to the front tube body 510 (i.e., to facilitate the bending of the basket rod assembly 500), and to improve the smoothness of the basket rod assembly 500 switching from the unfolded state to the folded state, in one embodiment, Fig.25 As shown, the front tube body 510 includes a first tube section 511 and a second tube section 512 arranged at an angle. Specifically, each front basket rod 513 includes a first tube section 511 and a second tube section 512 arranged at an angle, which is equivalent to each front basket rod 513 being an L-shaped structure. Among them, one end of the first tube section 511 away from the second tube section 512 is pivoted to the front wheel frame 111 at the seventh pivot point A7, and one end of the second tube section 512 away from the first tube section 511 is pivoted to the rear tube body 520 at the fifth rotation point B5. The opening of the angle α4 between the first tube section 511 and the second tube section 512 is arranged downward along the first direction F1. In this way, the fifth rotation point B5 can be avoided from having a hinge dead point, and the reliability of the bending of the front tube body 510 and the rear tube body 520 is improved. It should be noted that the first direction F1 refers to the vertical direction, and in this embodiment, it refers to the height direction of the frame body 100 when the frame body 100 is in the unfolded state.

[0162] See also Fig.26 and Fig. 27 When the basket rod assembly 500 is in the extended state, the angle α5 between the first tube section 511 and the rear tube body 520 is substantially 180 degrees (see Fig. 27 ). See Fig.32 and Fig.33 When the basket rod assembly 500 is in the folded state, the 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 angle α5 between the first tube section 511 and the rear tube body 520 can be an acute angle or substantially 0 degrees, which can be determined according to actual conditions. Fig. 27 , Fig.29 , Fig.31 as well as Fig.33 As shown, when the frame body 100 switches from the unfolded state to the folded state, the basket rod assembly 500 also switches from the extended state to the folded state. During this process, the angle α5 between the first tube section 511 and the rear tube body 520 gradually changes from 180 degrees to an acute angle.

[0163] It should be noted that the above “the driving assembly 310 is pivotally connected between the rider frame 120 and the wheel frame 110 ” includes at least two examples.

[0164] See also Figure 26 to Figure 29 In one example, the driving assembly 310 in the folding mechanism 300 is pivotally connected between the rear wheel frame 112 and the rider frame 120, and the linkage component 330 is pivotally connected to the driving assembly 310 and the rear tube body 520, respectively, for driving the rear tube body 520 to rotate around the eighth pivot point A8, and making the rear tube body 520 rotate relative to the front tube body 510 around the fifth rotation point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111. In one example, the driving assembly 310 is a rod-shaped structure and has a first driving section 3111 and a second driving section 3112. The first driving section 3111 and the second driving section 3112 have a first end and a second end, respectively. The first end of the first driving section 3111 and the first end of the second driving section 311 are far away 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.

[0165] The first end of the first driving section 3111 is pivotally connected to the first push handle frame 121 of the handle frame 120, the first end of the second driving section 3112 is pivotally connected to the linkage component 330, and the second pivot 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 pivot point B2. Compared to the first end of the first driving section 3111, the second pivot point B2 is closer to the first end of the second driving section 3112 of the driving assembly 310. In this way, when the frame body 100 is in the unfolded state (see Fig.26 and Fig. 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, which is equivalent to the pivot point C1 between the linkage component 330 and the driving assembly 310 being located between the front wheel frame 111 and the rear wheel frame 112. Therefore, when the driving assembly 310 pivots around the second rotation point B2, the driving assembly 310 will drive the linkage component 330 to move as a whole relative to the rear wheel frame 112 around the pivot point B2 and make the linkage component 330 pivot relative to the driving assembly 310, so that the fifth rotation point B5 of the rear tube body 520 and the front tube body 510 is driven to move as a whole (for example, move in a direction close to the first pivot seat 130), so that the rear tube body 520 rotates around the eighth pivot point A8 and the front tube body 510 rotates around the seventh pivot point A7, thereby changing the distance between the eighth pivot point A8 and the seventh pivot point A7, and the rear wheel frame 112 pivots relative to the front wheel frame 111. It can be understood 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 greater than the length of the second driving section 3112. When operating the driving assembly 310 to fold the frame body 100, the lever arm is longer and more labor-saving.

[0166] Continue to see Figure 26 to Figure 29 The driving assembly 310 is pivotally connected between the rider frame 120 and the rear wheel frame 112 (specifically, the rear rod 1121), and a second rotation point (or second rotation axis) B2 is formed on the rear wheel frame 112 (rear rod 1121). The second rotation axis B2 is parallel to the eighth pivot axis A8. The linkage component 330 is pivotally connected to the driving assembly 310 and the rear tube body 520 (specifically, the rear basket rod 521), respectively, and the pivot point C2 of the linkage component 330 and the rear tube body 520 (rear basket rod 521) is located between the fifth rotation point B5 and the eighth pivot point A8, and the pivot point C2 is closer to the fifth rotation point B5.

[0167] Of course, in another alternative example not shown, the driving assembly 310 may also be pivotally connected between the front wheel frame 111 and the rider frame 120, specifically, the first driving section 3111 of the driving assembly 310 is pivotally connected to the rider frame 120, and the second driving section 3112 of the driving assembly 310 is pivotally connected to the front wheel frame 111. The linkage component 330 is pivotally connected to the driving assembly 310 and the front tube 510, respectively, and is used to drive the front tube 510 to rotate around the seventh pivot point A7, and to make the front tube 510 rotate relative to the rear tube 520 around the fifth rotation point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111.

[0168] See also Figure 26 to Figure 29In one embodiment, the first driving section 3111 and the second driving section 3112 of the driving assembly 310 are arranged at an angle, and an opening of the first angle α1 between the first driving section 3111 and the second driving section 3112 is arranged upward along the first direction F1.

[0169] 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 angle α1 is arranged along the first direction F1 toward the upper side. Of course, in another alternative embodiment, the first angle α1 between the first driving section 3111 and the second driving section 3112 can be a right angle or an acute angle, which can be set according to actual needs. When the handle frame 120 is folded, that is, it is equivalent to making the first push handle frame 121 rotate relative to the second push handle frame 122 around the second pivot seat 123 and fold, the push portion 1211 will push the first drive section 3111 of the drive assembly 310 to rotate downward around the second rotation point B2, and the second drive section 3112 will rotate upward around the second rotation point B2. Since the opening of the first angle α1 between the first driving section 3111 and the second driving section 3112 is arranged upward along the first direction F1, when the second driving section 3112 moves upward, it can more easily drive the linkage component 330 to move upward, thereby making it easier for the pivot point C2 and the fifth rotation point B5 to move upward. In other words, the first drive section 3111 and the second drive section 3112 are arranged at an angle, and the opening of the first angle α1 therebetween is arranged upward, so as to facilitate the folding of the basket rod assembly 500 (specifically, between the front tube body 510 and the rear tube body 520). When the frame body 100 is folded, the drive assembly 310 can more easily drive the fifth rotation point B5 to move upward when rotating in the clockwise direction W2, thereby making it easier for the basket assembly 200 to move upward and then fold, so that the rear tube body 520 is closer to the rear wheel frame 112, thereby avoiding interference with the seat assembly 200 mentioned below during folding, thereby affecting the reliability of the folding of the entire frame body 100.

[0170] See also Figure 26 to Figure 29 In one embodiment, the length of the first driving section 3111 of the driving assembly 310 is greater than the length of the second driving section 3112 thereof. The first driving section 3111 and the second driving section 3112 form a lever structure (seesaw structure) relative to the second rotation point B2. Since the first driving section 3111 has a longer force arm, the basket rod assembly 500 can be folded more easily and labor-savingly by operating the first driving section 3111.

[0171] See also Fig. 27 , Fig.29 and Fig.31In one embodiment, the driving assembly 310 is provided with a stopper 317. When the basket rod assembly 500 is in an extended state, the stopper 317 is used to abut against the linkage component 330 to limit the linkage component 330 from pivoting in the clockwise direction W2 relative to the driving assembly 310 (for example, around the pivot point C1), so that the rear tube body 520 cannot move relative to the driving assembly 310, thereby keeping the basket rod assembly 500 in an extended state. Specifically, the stopper 317 is provided at one end of the driving assembly 310 close to the pivot point C1 between the linkage component 330 and the rear tube body 520, that is, at the second driving section 3112, and is located between the fifth rotation point B5 and the eighth pivot point A8, and is located on the side of the driving assembly 310 relatively close to the handlebar frame 120. More specifically, as Fig. 27 As shown, when the basket rod assembly 500 is in the unfolded state, the stopper 317 is located on the upper left side of the linkage component 330, so that the linkage component 330 can be restricted from continuing to rotate around the pivot point C1 in the clockwise direction W2, so that the linkage component 330 abuts against the stopper 317 and remains stationary, thereby making the linkage component 330 and the rear tube 520 relatively stationary, and the rear tube 520 remains stationary relative to the front tube 510, the rear wheel frame 112, etc., so that the frame body 100 can be stably maintained in the unfolded state. In addition, when the basket rod assembly 500 switches from the unfolded state to the folded state, the stopper 317 can also prevent the user from making misoperations and the like. Specifically, when the user needs to fold the basket rod assembly 500, the drive assembly 310 can be rotated around the second rotation point B2 in the clockwise direction W2, which is equivalent to pushing the first drive section 3111 of the drive assembly 310 downward. Therefore, after the stopper 317 is provided, the stopper 317 can abut against the linkage component 330, so 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 rod assembly 500 is in the folded state. At this time, the stopper 317 is located on the right side of the linkage component 330 and abuts against the linkage component 330. In this way, the linkage component 330 can be restricted from continuing to rotate in the counterclockwise direction W1 around the pivot point C1, so that the basket rod assembly 500 can be stably maintained in the folded state. Similarly, when the basket rod assembly 500 switches from the folded state to the unfolded state, the stopper 317 can also prevent the user from making misoperations. Specifically, when the user needs to unfold the basket rod assembly 500, the driving assembly 310 can be rotated in the counterclockwise direction W1 around the second rotation point B2, which is equivalent to pushing upward the first driving section 3111 of the driving assembly 310. Therefore, when the stopper 317 is located on the right side of the linkage component 330 and abuts against the linkage component 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.

[0172] See also Fig.21 and Fig.23 In one embodiment, the child stroller 1000 further includes a seat assembly 200. The seat assembly 200 can be directly used as a cushion, and the child can directly sit on the seat assembly 200. Of course, in another alternative embodiment, the seat assembly 200 can be used as a support member for supporting a carrier, and the child is supported on the seat assembly 200 by the carrier. Figure 21 to Figure 23 When the frame body 100 is in the unfolded state, the seat assembly 200 is located above the basket rod assembly 500 (see Fig.21 and Fig. 22 ). The seat assembly 200 is pivotally connected to the first pivot seat 130 and the driving assembly 310 respectively, wherein the seat assembly 200 and the first pivot seat 130 are pivotally connected at the second pivot point A2 (or the second pivot axis), and the seat assembly 200 and the driving assembly 310 are pivotally connected at the seventh rotation point (or the seventh rotation axis) B7. The seventh rotation point B7 is located on the side of the second rotation point B2 away from the linkage component 330. In this way, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 rotates and thereby drives the seat assembly 200 to rotate relative to the first pivot seat 130. At the same time, the driving assembly 310 drives the linkage component 330 to rotate, thereby driving 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 Fig.31 ).

[0173] The seat assembly 200 is substantially parallel to the rear tube 520, and the second pivot axis A2 and the seventh rotation axis B7 are both substantially parallel to the fourth pivot axis A4. In this way, when the frame body 100 switches from the unfolded state to the folded state, the seat assembly 200 and the basket rod assembly 500 (specifically the rear tube 520) can also remain substantially parallel, avoiding interference between the seat assembly 200 and the basket rod assembly 500.

[0174] See also Fig. 22 and Fig.23 In one embodiment, the seat assembly 200 includes, for example, a seat plate 212, a seat tube assembly 230, and a support rod 240. The seat tube assembly 230 is pivotally connected between the first pivot seat 130 and the drive assembly 310. The seat plate 212 is mounted on the seat tube assembly 230 to support a carrier or directly support a child. Specifically, the seat plate 212 can be detachably mounted on the seat tube assembly 230, for example, by means of a snap connection, a screw connection, etc. Of course, in another alternative embodiment, the seat plate 212 is fixedly mounted on the seat tube assembly 230. Continue to refer to Fig.23The support rod 240 is disposed on the seat tube assembly 230 and is located on the side of the seat plate 212 facing the basket rod assembly 500. Of course, in some other embodiments not shown, the seat assembly 200 may not be provided with the support rod 240, and this application is not limited to this.

[0175] See also Fig.23 and Fig.25 In one embodiment, the seat tube assembly 230 is, for example, in a U-shaped structure, which includes a first seat tube 231 located on the left and right sides and a second seat tube 232 connected between the two first seat tubes 231, and the second seat tube 232 extends along the second direction F2. The two first seat tubes 231 are respectively pivotally connected to the first pivot seat 130 on the same side. The support rod 240 is connected between the two first seat tubes 231, and the support rod 240 is generally arranged along the second direction F2. In this way, the seat tube assembly 230 can be installed on the frame body 100 with greater stability, which is conducive to improving the stability of the seat assembly 200 in supporting the vehicle or the child. Of course, in some other embodiments not shown, the seat tube assembly 230 may not be provided with the second seat tube 232, and this application is not limited to this.

[0176] Combine the following Figure 26 to Figure 31 The working principle of the folding mechanism 300 will be described below.

[0177] See also Fig.26 and Fig. 27When the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state, the first handle frame 121 and the second handle frame 122 remain relatively fixed, that is, the push portion 1211 also remains relatively fixed. Since the second handle frame 122, the push portion 1211, the drive assembly 310 and the rear wheel frame 112 constitute a four-bar structure, when the first handle frame 121 and the second handle frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and cannot move, so that the second handle frame 122, the drive assembly 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. At the same time, since the seat tube assembly 230, the rear wheel frame 112 and the drive assembly 310 can form a structure similar to a triangle, when the rear wheel frame 112 and the drive assembly 310 are both kept fixed, the seat assembly 200 can be kept in the unfolded state and always located above the basket rod assembly 500. In addition, when the frame body 100 is in the unfolded state, the basket rod assembly 500 is in the extended state. At this time, the front wheel frame 111 and the rear wheel frame 112 are arranged at an angle, at least a part of the basket rod assembly 500 is located between the front wheel frame 111 and the rear wheel frame 112, and the front tube body 510 and the rear tube body 520 are roughly in the same plane. In this way, the front wheel frame 111, the rear wheel frame 112 and the basket rod assembly 500 can be regarded as a triangular structure as a whole, so that the front wheel frame 111, the rear wheel frame 112 and the basket rod assembly 500 can be kept relatively fixed, so that the frame body 100 can be stably maintained in the unfolded state.

[0178] See also Figure 26 to Figure 31 When the user needs to move the frame body 100 from the unfolded state (see Fig.26 and Fig. 27 ) to the folded state (see Fig.30 and Fig.31), the unlocking mechanism 125 is pressed to switch the locking mechanism 124 to the unlocking state. Subsequently, the first handle frame 121 is rotated in the counterclockwise direction W1 around the second pivot seat 123 (or around the fifth pivot point A5) and folded relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the driving assembly 310 downward, so that the driving assembly 310 rotates in the clockwise direction W2 around the second rotation point B2. At this time, the first driving section 3111 of the driving assembly 310 rotates downward around the second rotation point B2, and the second driving section 3112 of the driving assembly 310 rotates upward around the second rotation point B2, and the linkage component 330 connected to the first driving section 3111 moves upward as a whole, and the pivot point C1 between the linkage component 330 and the rear tube body 520 also moves upward, so that the rear tube body 520 pivots around the eighth pivot point A8 in the clockwise direction W2, thereby causing the fifth rotation point B5 of the rear tube body 520 and the front tube body 510 to move upward, thereby driving the front tube body 510 to rotate around the seventh pivot point A7 in the counterclockwise direction W1, thereby switching the basket rod assembly 500 from the extended state to the folded state, and the distance between the seventh pivot point A7 and the eighth pivot point A8 is reduced, and finally the front wheel frame 111 and the rear wheel frame 112 are close to each other, so that the frame body 100 can be folded. During this process, one end of the linkage component 330 will rotate relative to the drive assembly 310 around the pivot point C1 in the counterclockwise direction W1, and the other end of the linkage component 330 will rotate relative to the rear tube 520 around the pivot point C2 in the counterclockwise direction W1 to adjust the angle and spacing between the drive assembly 310 and the rear tube 520, thereby providing a degree of freedom of movement for the relative movement between the drive assembly 310 and the rear tube 520, thereby allowing the drive assembly 310 to drive the rear tube 520 to pivot when rotating. Since the seat assembly 200 is pivotally connected to the drive assembly 310 and the first pivot seat 130 respectively, during the process of the drive assembly 310 rotating around the second pivot point B2 in the clockwise direction W2, the seat assembly 200 is driven to rotate relative to the first pivot seat 130 in the clockwise direction W2, thereby achieving synchronous folding of the seat assembly 200 and the basket rod assembly 500.

[0179] Of course, when the user needs to switch the frame body 100 from the folded state to the unfolded state, the user does not need to press the release mechanism 125, and can rotate the first handle frame 121 around the second pivot seat 123 (or around the fifth pivot point A5) in the counterclockwise direction W1 to unfold relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle 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, thereby pushing the linkage component 330 to move downward as a whole, and then pushing the pivot point C2 between the linkage component 330 and the rear tube 520 to move downward. As a result, the rear tube body 520 rotates in the counterclockwise direction W1 around the eighth pivot point A8, and the fifth pivot point B5 of the front tube body 510 and the rear tube body 520 moves downward, thereby driving the front tube body 510 to rotate in the clockwise direction W2, thereby causing the front tube body 510 and the rear tube body 520 to extend relative to each other, and the distance between the seventh pivot point A7 and the eighth pivot point A8 increases, and finally the front wheel frame 111 and the rear wheel frame 112 are pushed away from each other, so that the frame body 100 can be unfolded. In this process, one end of the linkage component 330 pivots in the clockwise direction W2 around the pivot point C1, and the other end of the linkage component 330 pivots in the clockwise direction W2 around the pivot point C2, so as to adjust the angle and spacing between the driving assembly 310 and the rear tube body 520, so as to allow the driving assembly 310 to drive the rear tube body 520 to pivot when rotating. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot seat 130 respectively, when the driving assembly 310 rotates in the counterclockwise direction W1 around the second rotation point B2, the seat assembly 200 is driven to rotate in the counterclockwise direction W1 relative to the first pivot seat 130, thereby achieving synchronous unfolding of the seat assembly 200 and the basket rod assembly 500.

[0180] See also Figures 35 to 38 In one embodiment, the child stroller 1000 further includes a folding auxiliary member 600. The folding auxiliary member 600 is, for example, a folding webbing. The support rod 240 and the seat plate 212 are spaced apart to form a through passage 250. The folding auxiliary member 600 is connected to the basket rod assembly 500 and passes through the through passage 250. During the folding process of the frame body 100, the folding auxiliary member 600 is operated to drive the basket rod 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 member 600 is located below the seat plate 212, so that the folding auxiliary member 600 is prevented from being exposed and affecting the aesthetics of the child stroller. In addition, the folding auxiliary member 600 is supported on the support rod 240. When not in use, it is stored and placed on the support rod 240 to prevent it from falling off to the ground and to prevent it from interfering with the rear wheel 622 when pushing the child stroller 1000 to walk.

[0181] In this embodiment, if Fig.25 , Fig.26 , Fig.36 as well as Fig.37 As shown, the folding webbing is connected to the rear tube 520, and the connection point between the two is located between the eighth pivot point A8 and the fifth rotation point B5. In this way, when folding the frame body 100, the user can pull the folding webbing upward along the first direction F1, and the folding webbing applies an upward force to the 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 along the clockwise direction W2, thereby driving the basket rod assembly 500 and the frame body 100 to fold quickly, that is, improving the smoothness of the folding of the frame body 100. More specifically, the folding webbing is connected to the pivot point C2 between the connecting member and the rear tube 520.

[0182] Of course, in another alternative embodiment not shown in the figure, the folding webbing can be connected to the front tube 510, and the connection point between the two is located at one end of the front tube 510 close to the fifth rotation point B5. In this way, the front tube 510 can be driven to rotate counterclockwise around the seventh pivot point A7 by pulling the folding webbing upward, thereby driving the basket rod assembly 500 and the frame body 100 to fold quickly. In addition, in another alternative embodiment, the folding webbing can also be directly connected to the fifth rotation point B5, or can also be connected to the second drive section 3112 of the drive assembly 310, and this application does not make any specific restrictions on this.

[0183] According to the above description, in the child stroller 1000 of the present application, the wheel frame 110 and the handle frame 120 can be folded, and the wheel frame 110 as a whole can be folded relative to the handle frame 120, so the frame body 100 can switch freely between the unfolded state and the folded state. Since the basket rod assembly 500 is pivoted on the wheel frame 110 and has an extended state and a folded state, the drive assembly 310 is pivoted between the handle frame 120 and the wheel frame 110, and is movably connected to the basket rod assembly 500 through the linkage component 330. Therefore, when the child stroller 1000 of the present application is folded, the drive assembly 310 can be directly moved / rotated relative to the frame body 100 as a whole by folding the frame body 100, and the linkage component 330 can be driven to pivot, thereby driving the basket rod assembly 500 to rotate, and the basket rod assembly 500 can be switched from the extended state to the folded state. In this way, not only the convenience of folding the stroller 1000 can be improved, but also the smoothness of folding the stroller 1000 can be improved. At the same time, since the seat assembly 200 in the present application is pivotally connected between the wheel frame 110 and the drive assembly 310, the seat assembly 200 is roughly parallel to the rear tube body 520 in the basket rod assembly 500, and the drive assembly 310 and the linkage component 330 are structurally arranged (specifically, the drive assembly 310 is pivotally connected between the rear wheel frame 112 and the rider frame 120, and the linkage component 330 is pivotally connected to the second drive section 3112 of the drive assembly 310 near the fifth rotation point B5), therefore, when the frame body 100 is folded, the drive assembly 310 drives the basket rod assembly 500 to bend. The curved folding (the front tube body 510 and the rear tube body 520 fold relative to each other) can make the basket rod assembly 500 fold more smoothly and approach the rear wheel frame 112. At the same time, the driving assembly 310 can also drive the seat assembly 200 to pivot and fold synchronously, so that the seat assembly 200 always remains roughly parallel to the rear tube body 520. Even for a large-volume basket assembly 200, it can be folded smoothly and quickly, and at the same time, the basket rod assembly 500 can be prevented from interfering with the seat assembly 200 during the folding process, thereby ensuring the smoothness and reliability of the overall folding of the stroller 1000.

[0184] The frame body according to the embodiment of the present application can improve the smoothness and convenience of folding the child stroller, and reduce the difficulty of folding the child stroller.

[0185] In the stroller according to the present application, since the wheel frame and the handle frame can be relatively folded so that the frame body has an expanded state and a folded state, the basket rod assembly is pivotally connected to the wheel frame and has an extended state and a folded state, and the drive assembly is pivotally connected between the handle frame and the wheel frame and is movably connected to the basket rod assembly through a linkage component. Therefore, when the stroller is folded, the drive assembly drives the linkage component to pivot directly by folding the frame body, thereby driving the basket rod assembly to switch from the extended state to the folded state. In this way, not only the convenience of folding the stroller can be improved, but also the smoothness of folding the stroller can be improved.

[0186] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0187] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A baby stroller, characterized in that: include: 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 expanded 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 expanded 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 an unfolded state, an opening of the first angle is arranged upward along a first direction; at least a portion 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, characterized in that: The linkage member is pivotally connected to an end of the second section body away from the first section body.

9. The stroller according to any one of claims 1 to 5, characterized in that: The handle frame includes 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 stroller according to claim 9, characterized in that: The rider frame also includes: 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 unlocking 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 unlocking 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 unfolded state and the folded state through the four-bar structure.

13. A child stroller, characterized in that: include: 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 basket rod assembly is pivotally connected to the wheel frame and has an extended state and a folded state; as well as 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, characterized in that: The front tube body includes a first tube section and a second tube section arranged at an angle, an end of the first tube section away from the second tube section is pivotally connected to the front wheel frame at the seventh pivot point, an end of the second tube section away from the first tube section is pivotally connected to the rear tube body at the fifth rotation point, and an opening of the angle between the first tube section and the second tube section 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 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 rider 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 child stroller further comprises a folding auxiliary component, wherein the folding auxiliary component is connected to the basket rod assembly so as 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 child stroller also includes: 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.

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