Stroller

Abstract

The utility model relates to a child stroller, which comprises a stroller frame body, a stroller frame, a stroller frame, a stroller frame connecting piece, a stroller frame connecting piece, a stroller frame connecting piece and a stroller frame connecting piece, and the stroller frame body comprises a wheel frame and a stroller hand frame, and the stroller hand frame is pivoted with the wheel frame; 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. Therefore, the loose flexible cloth cover at the first pivoting point is not easy to contact with the ground, so that the possibility of abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wheeled mobile devices, in particular to a children's stroller. Background Art

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

[0003] Generally speaking, a stroller seat consists of a seat portion, a backrest portion, and a flexible fabric cover that fits over the seat and backrest portions. When the stroller frame is folded, the seat and backrest portion rotate with the frame, allowing the seat to fold synchronously. However, in common stroller seats currently on the market, the flexible fabric cover becomes loose at the pivotal connection between the seat and backrest portions when the stroller frame folds. This loose portion of the fabric cover easily comes into contact with the ground during folding, which not only easily stains the cover but can also cause wear and tear.

[0004] Furthermore, to meet users' requirements for practicality and convenience, strollers are typically equipped with a folding mechanism that allows users to switch between an expanded and folded state. Furthermore, to facilitate the placement of carry-on items and reduce the user's burden, strollers often feature a basket with storage space beneath the seat. However, the basket's location beneath the seat and the limitations of the folding mechanism can make folding the stroller cumbersome and awkward, increasing the difficulty of folding the stroller. Utility Model Content

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

[0006] According to one aspect of the present invention, a child stroller is provided, comprising: a frame body, including a wheel frame and a hand frame, the hand 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, including 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 hand 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 hand 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 the stroller according to the present invention, the wheel frame and the handlebar frame of the frame body are pivotally connected to each other, thereby enabling the frame body to have two states, an expanded state and a collapsed state, and to switch between these two states. Furthermore, because the seat portion and the backrest portion of 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 handlebar frame and the wheel frame, and the linkage member is pivotally connected to the drive assembly and the seat portion, respectively. Furthermore, when the frame body switches from the expanded state to the collapsed state, the drive assembly can pivot relative to the wheel frame or the handlebar frame and, through the linkage member, drive the first pivot point of the seat portion to rotate upward about the second pivot point. Therefore, when the stroller is placed on the ground and needs to be folded, the handlebar frame only needs to be pivoted relative to the wheel frame. Under the coordinated action of the drive assembly and the linkage, the first pivot point of the seat portion will rotate upward about the second pivot point, that is, the first pivot point will move away from the ground, thereby achieving the folding of the seat. In addition, during this process, the end of the backrest portion away from the first pivot point will move toward the ground. In other words, during the process of the seat portion pivoting about the second pivot point, the backrest portion and the seat portion will bend downward about the first pivot point. This prevents the loose flexible fabric cover at the first pivot point from contacting the ground, thereby reducing the possibility of wear.

[0008] In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to each other; the drive assembly includes a drive member and a rotating member, the drive 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 drive 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 drive 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 drive 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.

[0009] In one embodiment, the drive assembly further includes a transmission member, which is disposed on the drive member or the rotating member, the first end of the linkage member is pivotally connected to the seat portion, and the second end is pivotally connected to the transmission member; when the frame body is in the expanded state, the transmission member is located between the front wheel frame and the rear wheel frame.

[0010] In one embodiment, the transmission member is arranged at an angle to the driving member or the rotating member.

[0011] 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.

[0012] 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 expanded 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 direction.

[0013] In one embodiment, the drive assembly includes a drive member and a transmission member, the drive member is pivotally connected between the rider frame and the wheel frame, the transmission member is arranged on the drive 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 part; when the frame body switches from the expanded state to the folded state, the drive 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 direction.

[0014] 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 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 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.

[0015] In one embodiment, the transmission member is integrally formed on the driving member.

[0016] 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 expanded 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.

[0017] In one embodiment, the transmission member includes a first segment and a second segment connected to each other, and a second angle is formed between the first segment and the second segment. The first segment is stacked on the driving member and is located between the first rotation point and the second rotation point. The second segment is pivotally connected to the linkage member, and at least when the frame body is in the expanded state, the opening of the second angle is set downward along the first direction.

[0018] In one embodiment, the linkage member is pivotally connected to an end of the second segment away from the first segment.

[0019] 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.

[0020] In one embodiment, the third pivot point is coaxial with the first pivot point.

[0021] In one embodiment, the frame body further 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 coaxial or staggered with the fourth pivot point.

[0022] In one embodiment, the handle frame includes a first push handle frame, a second push handle frame and a second pivot seat, the second pivot seat has a fifth pivot point, the second push handle frame is pivotally connected to the wheel frame and is pivotally connected to the first push handle frame at the fifth pivot point through the second pivot seat, and the drive assembly is pivotally connected between the first push handle frame and the wheel frame.

[0023] 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 release state for allowing the first handle frame and the second handle frame to rotate relative to each other; and a release 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 release state.

[0024] In one embodiment, the second pivot seat includes a fixed seat body and a pivot seat body, and 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 released state, the locking piece retracts from the locking recess.

[0025] In one embodiment, the unlocking mechanism includes: a driving wheel, rotatably provided on the first handle frame; a traction member, connected between the driving wheel and the locking member; and a first operating member, movably provided on the first handle frame and connected to the driving wheel, the first operating member having 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 locked state to the unlocked state through the traction member.

[0026] 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 the moving path of the first operating member to restrict the 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 the first operating member to move.

[0027] In one embodiment, the release mechanism further includes: a first restoring member abutting against the second operating member and configured to bias the operating portion so that the second operating member is constantly pivoted toward the second locking position.

[0028] In one embodiment, the release mechanism further 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 in 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 in the second locking position, at least a portion of the operating portion extends out of the accommodating cavity through the second opening.

[0029] In one embodiment, the release mechanism further 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 abuts against the operating part of the second operating member, and the other end of the first reset member abuts against the second mounting seat.

[0030] In one embodiment, the drive 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 drive 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.

[0031] According to one aspect of the present invention, 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.

[0032] In the stroller according to the present invention, since the wheel frame and the handle frame can be folded relative to each other 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.

[0033] In one embodiment, the linkage component is pivotally connected to the basket rod assembly and the drive assembly respectively. When the drive assembly pivots relative to the wheel frame or the handlebar 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.

[0034] 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.

[0035] In one embodiment, the front tube body includes a first tube section and a second tube section arranged at an angle, the 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, the 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 the opening of the angle between the first tube section and the second tube section is arranged downward along the first direction.

[0036] 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.

[0037] In one embodiment, the drive assembly forms a second rotation point on the rear wheel frame, and the connecting component is pivotally connected to the rear tube body and the drive assembly respectively. When the drive assembly pivots around the second rotation point, the drive assembly drives the connecting component to move as a whole relative to the frame body and rotate relative to the drive assembly, so as 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.

[0038] 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.

[0039] 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.

[0040] In one embodiment, the drive 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 drive 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.

[0041] In one embodiment, the drive assembly is provided with a stop portion. 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 drive assembly, thereby keeping the basket rod assembly in the extended state.

[0042] In one embodiment, the drive assembly and the wheel frame are pivotally connected at a second rotation point, and the stop portion is arranged on the second drive section of the drive assembly close to the linkage component and is located on a side of the drive assembly relatively close to the rider frame.

[0043] In one embodiment, the child stroller further includes a folding assist component connected to the basket rod assembly to allow the basket rod assembly to be driven to switch to the folded state by operating the folding assist component.

[0044] 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.

[0045] In one embodiment, the child stroller further 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, pivotally connected to the first pivot seat and the drive assembly respectively; when the frame body switches from the expanded 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.

[0046] In one embodiment, during the folding process of the frame body, the seat assembly is parallel to at least a portion of the basket rod assembly.

[0047] 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.

[0048] 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.

[0049] 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-channel; the child stroller further includes a folding auxiliary component, which is connected to the basket rod assembly and passes through the through-channel to allow the basket rod assembly to be driven to switch to the folded state by operating the folding auxiliary component.

[0050] In one embodiment, the frame body further includes a first pivot seat having 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.

[0051] In one embodiment, the handle frame includes a first push handle frame, a second push handle frame and a second pivot seat, the second pivot seat has a fifth pivot point, the second push handle frame is pivotally connected to the wheel frame and is pivotally connected to the first push handle frame at the fifth pivot point through the second pivot seat, and the first drive section of the drive assembly is pivotally connected to the first push handle frame.

[0052] In one embodiment, the child stroller 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 release state for allowing the first handle frame and the second handle frame to rotate relative to each other; and a release mechanism, disposed on the first handle frame or the second handle frame and operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the release state.

[0053] In one embodiment, the drive 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 drive 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

[0054] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0057] Figure 1 This is a three-dimensional diagram of a child stroller in one embodiment of the present invention;

[0058] Figure 2 for Figure 1 A perspective view of the stroller from another perspective;

[0059] Figure 3 for Figure 1 A perspective view of the stroller from another perspective;

[0060] Figure 4 for Figure 3 A magnified view of point A;

[0061] Figure 5 for Figure 3 Enlarged view of point B;

[0062] Figure 6 For the Figure 3 A sectional view taken along line U1-U1, with some of the seat structures omitted;

[0063] Figure 7 for Figure 6 Enlarged view of point C;

[0064] Figure 8 for Figure 3 A schematic diagram of a portion of the structure of the handlebar frame of the stroller shown;

[0065] Figure 9 For the Figure 8 A 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;

[0066] Figure 10 For the Figure 8 A 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;

[0067] Figure 11 For the Figure 8 A cross-sectional view of the U3-U3 line, with part of the structure of the driver's frame exploded;

[0068] Figure 12 for Figure 11 Enlarged view of point D in the middle;

[0069] Figure 13 For the Figure 3 A cross-sectional view taken along line U4-U4, wherein the frame body is in an unfolded state;

[0070] Figure 14 for Figure 13 Enlarged view of point E;

[0071] Figure 15 For the Figure 3 A cross-sectional view taken along line U4-U4, wherein the frame body is in a first transition state between the unfolded state and the folded state;

[0072] Figure 16 for Figure 15 Enlarged view of point F;

[0073] Figure 17 For the 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;

[0074] Figure 18 for Figure 17 Enlarged view of point G;

[0075] Figure 19 for Figure 1 A side view of the stroller with the frame body in a folded state;

[0076] Figure 20 for Figure 1 A three-dimensional view of the stroller with the frame body in a folded state;

[0077] Figure 21 is a perspective view of a child stroller according to another embodiment of the present invention;

[0078] Figure 22 for Figure 21 A perspective view of the stroller from another perspective;

[0079] Figure 23 for Figure 21 A perspective view of the stroller shown with the seat panel omitted;

[0080] Figure 24 for Figure 23 Enlarged view of H;

[0081] Figure 25 for Figure 23 Magnified view of point I;

[0082] Figure 26 For the Figure 21 A sectional view taken along line U5-U5, wherein the stroller is in an unfolded state;

[0083] Figure 27 for Figure 26 Enlarged view of point J;

[0084] Figure 28 For the Figure 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;

[0085] Figure 29 for Figure 28 Enlarged view of K;

[0086] Figure 30 For the Figure 21 A cross-sectional view taken along line U5-U5, wherein the stroller is in a second transition state between the unfolded state and the folded state;

[0087] Figure 31 for Figure 30 Enlarged view of L;

[0088] Figure 32 for Figure 21 A side view of the stroller shown in a folded position;

[0089] Figure 33 for Figure 21 A perspective view of the stroller shown in a folded state;

[0090] Figure 34 For the Figure 21 Sectional view of line U6-U6;

[0091] Figure 35 for Figure 34 a perspective view of the stroller shown;

[0092] Figure 36 for Figure 21 The stroller is shown in a perspective view with the seat plate omitted, and is provided with a folding aid.

[0093] Figure 37 For the Figure 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 aid;

[0094] Figure 38 for Figure 21 The stroller is shown in a three-dimensional view in a folded state, in which the stroller is provided with a folding auxiliary member. DETAILED DESCRIPTION

[0095] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0096] One embodiment of the present invention provides a child stroller 1000. A carrier is detachably mounted on the child stroller 1000. It should be noted that the child stroller provided by the present invention can be adapted for different uses depending on the type of carrier. For example, when the carrier is a seat or a carrier, the child stroller is suitable for infants and young children. When the carrier is a pet carrier, the child stroller can also be used as a pet stroller for pets.

[0097] Figures 1 to 3 A child stroller 1000 according to an embodiment of the present invention is shown. The overall structure of the child stroller 1000 is generally 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 description of the child stroller 1000.

[0098] See Figures 1 to 3 The frame body 100 of the 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 FIG. Figure 1 and Figure 2 ) and folded state ( Figure 18 and Figure 19 ). Specifically, the wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 that are pivotally connected. The rider frame 120 includes a first push handle frame 121 and a second push handle frame 122 that 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 below.

[0099] Continue to see Figures 1 to 3 In one embodiment, the front wheel frame 111 is, for example, U-shaped and includes left and right front rods 1111 and a front crossbar 1112 connected between the two front rods 1111. The front crossbar 1112 extends generally along a second direction F2, which corresponds to the left-right direction. When a child is seated in the seat assembly 200 of the stroller 1000, the front crossbar 1112 can also serve as a footrest.

[0100] 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-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 crossbar 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 mount a front wheel 612 to enable the child stroller 1000 to be movable, wherein the front wheels 612 can be universal wheels or non-universal wheels. 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 installed in the center of 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.

[0101] It should be noted that, unless otherwise expressly specified or limited, directional terms such as "left" and "right" regarding the stroller 1000 in the various embodiments of the present invention are based on the "left" and "right" directions of the stroller 1000 during normal travel. Arrows L and R are used in the figures to schematically indicate the "left" and "right" directions. These directional terms are used solely to clarify the description of the embodiments of the present invention and are not intended to unduly limit the scope of protection of the present invention.

[0102] See again Figures 1 to 3 The rear wheel frame 112, for example, has a U-shaped structure and includes two rear rods 1121 located on either side and a rear crossbar 1122 connected between the two rear rods 1121. The rear crossbar 1122 extends along the second direction F2. At least one rear wheel seat 621 is mounted on the bottom of the rear wheel frame 112. Specifically, in this embodiment, two rear wheel seats 621 are mounted on the bottom of the rear wheel frame 112, spaced apart in the left-right direction (i.e., the second direction F2). More specifically, the two rear wheel seats 621 are mounted on the left and right ends of the rear crossbar 1122, with the two rear rods 1121 respectively connected to the rear wheel seat 621 on the same side. Each rear wheel seat 621 is used to mount a rear wheel 622, which can be, for example, a universal wheel or a non-universal wheel. In this embodiment, the rear wheels 622 are larger than the front wheels 612 to enhance the overall stability of the stroller 1000. 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 .

[0103] Alternatively, in another alternative embodiment, the rear wheel frame 112 may have other implementations, such as the rear wheel frame 112 comprising only two rear rods 1121, one end of the two rear rods 1121 being connected to form a V-shaped structure, and a rear wheel seat 621 being centrally mounted on the bottom of the rear wheel frame 112. Alternatively, for example, the rear wheel frame 112 may comprise only two rear rods 1121 arranged parallel to each other in the left-right direction, and the two rear wheel seats 621 may be connected to the two rear rods 1121, respectively.

[0104] 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 a fourth pivot axis) 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, for example, 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 base 130 includes a first base 131 and a second base 132. The first base 131 and the second base 132 are stacked and coaxially pivot about a fourth pivot point A4. The connecting portion of the first base 131 is connected to the front rod 1111, and the connecting portion of the second base 132 is connected to the rear rod 1121.

[0105] See also Figures 3 to 5In one embodiment, the handrail 120 can be pivotally connected to the wheel frame 110 via a first pivot seat 130, for example, and can rotate about a 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 about the fourth pivot point A4. Specifically, the connecting portion of the third seat body 133 is connected to the handrail 120. More specifically, the handrail 120 can include, for example, a first push handle frame 121 and a second push handle frame 122 that are pivotally connected to each other. The end of the second push handle frame 122 that is 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 frame body 100 can be folded by pivoting, so that the frame body 100 can be switched between an expanded state and a folded state. More specifically, the first handle frame 121 is, for example, a U-shaped structure, and includes two first support rods 1212 and a handle rod 1213 connected between the two first support rods 1212. The handle rod 1213 extends along the second direction F2 and is used for the user to grasp 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 pivotally connected to the first support rod 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.

[0106] 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 via 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 via the second pivot seat 123. 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 base 123 may include, for example, a fixed base body 1231 and a pivot base body 1232. The fixed base body 1231 and the pivot base body 1232 are capable of coaxially pivoting about a fifth pivot point A5. One of the fixed base body 1231 and the pivot base body 1232 is connected to the first handle frame 121, and the other is connected to the second handle frame 122. Specifically, in this embodiment, the connecting portion of the fixed base body 1231 is connected to the second handle frame 122, and the connecting portion of the pivot base body 1232 is connected to the first handle frame 121.

[0107] In order to prevent the first push handle frame 121 from rotating freely relative to the second push handle frame 122, in one embodiment, as shown in FIG. 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 disposed within the second pivot seat 123 and has a locked state that restricts relative rotation between the first and second handle frames 121, 122, and a released state that allows relative rotation between the first and second handle frames 121, 122. The release mechanism 125 is disposed on the handle frame 120, such as the first and second handle frames 121, 122. The operating principle of the release mechanism 125 will be described below using the example of the release mechanism 125 disposed on the first handle frame 121. Specifically, the release mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locked and released states, which is equivalent to allowing or restricting relative rotation between the first and second handle frames 121, 122.

[0108] Specifically, 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 (see FIG. 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 Figure 19 Of course, in another alternative embodiment, when the frame body 100 is in the expanded state, the angle α3 between the first push handle frame 121 and the second push handle frame 122 may also be an obtuse angle or an acute angle.

[0109] 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 1231 and the pivoting seat 1232, while the locking recess 1242 is formed in the other of the pivoting seat 1232 and the fixed seat 1231. Specifically, in this embodiment, the locking member 1241 is movably disposed in the pivoting seat 1232, while the locking recess 1242 is formed in the fixed seat 1231. When the locking mechanism 124 is in the locked state, the locking member 1241 is inserted into the locking recess 1242 to restrict the pivoting seat 1232 from rotating relative to the fixed seat 1231. When the locking mechanism 124 is in the unlocked state, the locking member 1241 retracts from the locking recess 1242, allowing the pivoting seat 1232 to move relative to the fixed seat 1231.

[0110] See also Figures 8 to 12In one embodiment, the release mechanism 125 includes a drive wheel 1251, a traction member 1252, and a first operating member 1253. The drive wheel 1251 is rotatably mounted on the first handle frame 121. The traction member 1252 is connected between the drive wheel 1251 and the locking member 1241. The first operating member 1253 is movably mounted on the first handle frame 121 and connected to the drive wheel 1251. Specifically, the first operating member 1253 has a first locked position and a first released position. When the first operating member 1253 moves from the first locked position to the first released position, the first operating member 1253 drives the drive wheel 1251 to rotate. The drive wheel 1251, in turn, drives the traction member 1252 to move, thereby switching the locking mechanism 124 from the locked state to the released state. In other words, the rotation of the drive wheel 1251 drives the traction member 1252 to move, which in turn drives the locking member 1241 to retract from the locking recess 1242. More specifically, the traction member 1252 can 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 .

[0111] It should be noted that the driving wheel 1251 can be directly connected to the first handle frame 121, or can be 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, by being mounted on the first handle frame 121 via the second mounting base 1257 described below.

[0112] See also Figures 9 to 12 In this embodiment, the handle rod 1213 of the first handle frame 121 has a cavity 1214 inside, that is, the handle rod 1213 can be regarded as a hollow tube. The rod wall of the handle rod 1213 is provided with a mounting port 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 Figure 12 As shown, the drive wheel 1251 is provided with a first connecting portion 12511, which is offset from the first rotating shaft 1258. The first operating member 1253 has a second connecting portion 12531, and the first connecting portion 12511 and the second connecting portion 12531 are connected by a concave-convex fit. For example, the first connecting portion 12511 can be a connecting post, and the second connecting portion 12531 can be a collar that is sleeved over the connecting post to flexibly connect the first operating member 1253 to the drive wheel 1251. When the first operating member 1253 is pushed, it drives the drive wheel 1251 to rotate about the first rotating shaft 1258.

[0113] See also Figure 9 、 Figure 10 and Figure 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 mounted at the mounting opening of the push handle rod 1213. 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 communicate with the cavity 1214 of the push handle rod 1213 through the third opening 12564 and the mounting opening. Furthermore, 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 connect to the first connecting portion 12511 of the drive 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 FIG. Figure 8 and Figure 9 In this way, the user can control the rotation of the driving wheel 1251 by pushing the portion of the first operating member 1253 protruding from the accommodating cavity 12561, thereby releasing the lock.

[0114] See also Figure 6 In one embodiment, the release mechanism 125 further includes a second reset member 1259. The second reset member 1259 abuts against the locking member 1241 and is used to drive the locking member 1241 to reset so that the locking member 1241 remains in the locked state.

[0115] 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 includes 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 in the second locking position, the locking portion 12542 is located in the movement path of the first operating member 1253, restricting the movement of the first operating member 1253. When the second operating member 1254 is in the first unlocking position, the locking portion 12542 deviates from the movement path of the first operating member 1253, allowing the first operating member 1253 to move. This prevents the user from accidentally touching the first operating member 1253, thereby preventing the frame body 100 from collapsing.

[0116] Specifically, in this embodiment, Figure 9 and Figure 10As shown, the first mounting seat 1256 further has a second opening 12563 that passes through 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. 1 ). Figure 12 ) is pivotally connected to the first mounting base 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 base 1256 (see FIG. Figure 9 and Figure 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.

[0117] See also Figure 9 、 Figure 10 as well as Figure 12 In one embodiment, the release mechanism 125 further includes a first return member 1255. The first return member 1255 abuts against the second operating member 1254 and is used to bias the operating portion 12541 to cause the second operating member 1254 to pivot toward the second locked position. Specifically, the first return member 1255 is housed within the accommodating cavity 12561, with one end abutting against the second operating member 1254, specifically the operating portion 12541, and the other end abutting against the second mounting seat 1257. Thus, when a user needs to unlock the first handle frame 121 and the second handle frame 122, they can first press the operating portion 12541 of the second operating member 1254, causing the locking portion 12542 to tilt and deflect from the movement path of the first operating member 1253. Then, they can press the first operating member 1253 upward, causing it to rotate the drive wheel 1251, and the traction member 1252 drives the locking member 1241 out of the locking recess 1242. At this time, the user can rotate the first handle frame 121 at will.

[0118] See also Figure 3 and Figure 4 ,as well as Figure 13 and Figure 14In one embodiment, the seat assembly 200 may include a seat portion 210 and a backrest portion 220. The seat portion 210 and the backrest portion 220 are pivotally connected to each other to form a first pivot point A1 (or first pivot axis). The seat portion 210 is pivotally connected to the frame body 100 to form a second pivot point A2 (or second pivot axis). Specifically, the seat portion 210 may be pivotally connected to the first pivot seat 130 on the frame body 100 to 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 child's lower body (buttocks), and the backrest portion 220 is configured to support the child's upper body (back). 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 mounted on the seat tube 211 to support the child's buttocks.

[0119] Furthermore, in one embodiment, the seat assembly 200 may also include a flexible fabric cover (not shown), which may be single-layer or multi-layer. When the flexible fabric cover is multi-layered, cushioning material, such as cotton or foam, is placed between each layer. When the flexible fabric cover is placed over the seat portion 210 and backrest portion 220, it not only enhances the appearance of the seat assembly 200 but also provides increased comfort for children. In one embodiment, the handlebar 120 is also provided with a tie strap (not shown). Specifically, each end of the tie strap is connected to a second support rod 1221 located on the left and right sides, respectively. The tie strap is designed to be attached to the middle portion of the backrest portion 220 or to the end of the middle portion away from the first pivot point A1. This provides support for the backrest portion 220, allowing the child to rest their back against the backrest portion 220 when seated, enhancing riding comfort. Furthermore, the tie strap is adjustable in length. 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.

[0120] 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.

[0121] It should be noted that, unless otherwise expressly specified or limited, directional terms such as "front" and "rear" of the stroller in the various embodiments of the present invention are based on the "front" and "rear" orientations of the stroller in normal travel. Arrows B and P are used in the figures to schematically indicate the "front" and "rear" directions. These directional terms are used solely to clarify the description of the embodiments of the present invention and are not intended to unduly limit the scope of protection of the present invention.

[0122] See also Figure 3 、 Figure 4 、 Figure 13 as well as Figure 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. When the frame body 100 switches from the unfolded state to the folded state (see FIG. Figures 13 to 19 ), the drive 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.

[0123] See also Figure 13 as well as Figure 14In one embodiment, the drive assembly 310 includes a drive member 311 and a rotating member 312. The drive member 311 is pivotally connected between the rider frame 120 and the rear wheel frame 112. The rotating member 312 is pivotally connected to the front wheel frame 111 at one end and pivotally connected to the drive member 311 at the other end at a first pivot point B1 (or first rotation axis). When the frame body 100 is in the deployed state, the first pivot point B1 and the transmission member 313 of the drive assembly 310 are both located between the front wheel frame 111 and the rear wheel frame 112. Thus, when the drive member 311 pivots relative to the rear wheel frame 112, the first pivot point B1 is displaced in the first direction F1, driving the rotating member 312 to rotate relative to the front wheel frame 111, thereby causing the front wheel frame 111 to pivot relative to the rear wheel frame 112. Furthermore, the linkage member 320 has a first end pivotally connected to the seat portion 210 and a second end pivotally connected to the drive 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, thereby pulling or pushing the seat portion 210, allowing the first pivot point A1 of the seat portion 210 to rotate about the second pivot point A2. Specifically, the linkage member 320 and the seat portion 210 are pivotally connected at a third pivot point A3 (or a third pivot axis), and the third pivot point A3 is located on the side of the second pivot point A2 that is closer to the first pivot point A1. Thus, when the driving member 311 rotates counterclockwise about the second pivot point B2, the linkage member 320 moves upward relative to the wheel frame 110 in the first direction F1 (i.e., the third pivot point A3 moves upward in the first direction F1). This causes the third pivot point A3 to rotate upward about the second pivot point A2 along the first direction W (i.e., the seat portion 210 rotates clockwise about the second pivot point A2), thereby achieving folding of the seat portion 210. More specifically, in this embodiment, the third pivot point A3 is coaxial with the first pivot point A1. This increases the moment arm, making it easier for the seat portion 210 and the backrest portion 220 to bend and fold (the specific bending process will be described below).

[0124] Furthermore, if Figure 4 、 Figure 5 and Figure 7 As shown, the drive assembly 310 further includes a transmission member 313, which is disposed on the drive 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, i.e., the second end of the linkage member 320 is pivotally connected to the drive member 311 via 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. Figure 13 and Figure 14In one embodiment, the driving member 311 is pivotally connected to the rear wheel frame 112, forming a second pivot point B2 (or second rotation axis) on the rear wheel frame 112. One end of the rotating member 312 is pivotally connected to the front wheel frame 111, forming a third pivot point B3 (or third rotation axis) on the front wheel frame 111. When the frame body 100 is in the deployed state, the first pivot point B1 and the transmission member 313 are both located between the second pivot point B2 and the third pivot point B3. When the driving member 311 pivots about the second pivot point B2, the driving member 311 drives the rotating member 312 to rotate about the third pivot point B3 via the first pivot point B1, while simultaneously driving the transmission member 313 to rotate about the second pivot point B2, thereby driving the linkage member 320 to move as a whole relative to the frame body 100, thereby causing the first pivot point A1 of the seat portion 210 to rotate about the second pivot point A2.

[0125] In other embodiments not shown, the drive assembly 310 includes a drive member 311 and a transmission member 313. The drive member 311 is pivotally connected between the rider frame 120 and the wheel frame 110, and the transmission member 313 is disposed on the drive member 311. The second end of the linkage member 320 is pivotally connected to the transmission member 313, and the first end of the linkage member 320 is pivotally connected to the seat portion 210. When the frame body 100 switches from the deployed state to the collapsed state, the drive 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, causing the first pivot point A1 of the seat portion 210 to rotate upward about the second pivot point A2 along the first direction W. The transmission member 313 is pivotally connected to the front wheel frame 111 of the wheel frame 110, and the rotation member 312 may not be disposed between the drive 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 invention.

[0126] See also Figure 1 and Figure 13 In this embodiment, the driving member 311 is pivotally connected between the first handle frame 121 and the rear wheel frame 112. Specifically, the end of the first handle frame 121 near the second handle frame 122 has a push portion 1211. The driving member 311 is pivotally connected between the push portion 1211 and the rear wheel frame 112, and a fourth rotation point B4 (or 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 linkage structure. Through this four-bar linkage structure, the frame body 100 can be switched between the deployed state and the folded state. At the same time, when the frame body 100 switches between the deployed state and the folded state, the seat assembly 200 can be deployed and folded through components such as the driving member 311, the transmission member 313, and the linkage member 320.

[0127] It should be noted that the rods of the "four-bar linkage structure" mainly include the second push handle frame 122, the push portion 1211, the driving member 311, and part of the frame body of the rear wheel frame 112. Specifically, when the first push handle frame 121 and the second push handle frame 122 are bent about the fifth pivot point A5, the push portion 1211 pushes the driving member 311 to rotate counterclockwise about the second rotation point B2. At the same time, the second push handle frame 122 can also rotate counterclockwise about 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.

[0128] Specifically, if Figures 13 to 16 As shown, the transmission member 313 is disposed on the driving member 311. 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, driven by the push portion 1211, rotates counterclockwise about the second pivot point B2. During this rotation, the first pivot point B1 moves upward in the first direction F1, causing the rotating member 312 to rotate clockwise about the first pivot point B3 and simultaneously driving the transmission member 313 to rotate counterclockwise about the second pivot point B2. This causes the linkage member 320 to move upward relative to the entire frame body 100 in the first direction F1. Consequently, the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2 along the first direction W, effectively rotating the seat portion 210 clockwise about the second pivot point A2. At the same time, as described above, when the first handle frame 121 is bent relative to the second handle frame 122, the second handle frame 122 rotates counterclockwise about the first pivot seat 130 to approach the rear wheel frame 122. Because the backrest 220 is connected to the second handle frame 122 via the flexible fabric cover, the second handle frame 122 drives the backrest 220 to rotate counterclockwise about the first pivot point A1 as it approaches the rear wheel frame 122. Thus, during the folding process of the frame body 100, the driving member 311, the transmission member 313, and the linkage member 320 cooperate to cause both the backrest 220 and the seat portion 210 to bend downward about the first pivot point A1 (i.e., the backrest 220 rotates counterclockwise about the first pivot axis A1, and the seat portion 210 rotates clockwise about the first pivot axis A1). Since the first pivot point A1 will gradually move away from the ground during the bending process, the loose flexible cloth cover at the first pivot point A1 is not likely to come into contact with 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 (forwardmost) position in the front-to-back direction of the stroller 1000. Therefore, despite the relatively large size of the seat portion 210, the possibility of interference between the seat portion 210 and other structures (such as the handlebar 120) during the unfolding and folding of the seat assembly 200 is avoided, thereby improving the smoothness of the overall folding of the stroller 1000. Furthermore, when the seat portion 210 is located at the outermost position, the flexible fabric cover at the pivotal connection between the seat portion 210 and the backrest portion 220 is prevented from interfering with other structures, thereby making the stroller 1000 of the present invention even smaller when folded.

[0129] Optionally, in other alternative embodiments, during the process of the linkage 320 pushing 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 backrest portion 220 will still rotate counterclockwise relative to the first pivot point A1 at its end away from the first pivot point A1 under the action of gravity.

[0130] In one embodiment, the transmission member 313 is disposed at an angle to the driving member 311. The transmission member 313 is disposed on the side of the driving member 311 facing away from the seat assembly 200. This increases the rotation radius of the linkage member 320 relative to the second rotation point B2, thereby increasing the distance that the linkage member 320 can move upward generally in the first direction F1, thereby ensuring that the seat assembly 200 can be fully folded.

[0131] Figures 13 to 19 The figure shows the folding process of the frame body 100 when the transmission member 313 is arranged on the driving member 311. Figure 13 and Figure 14 The frame body 100 is in an expanded state; Figure 15 and Figure 16 The frame body 100 is in a first transition state between the unfolded state and the folded state; Figure 17 and Figure 18 The frame body 100 is in a second transition state between the unfolded state and the folded state; Figure 19The frame body 100 is in the folded state. Thus, when the frame body 100 of this embodiment needs to be folded, the second operating member 1254 and the first operating member 1253 are first operated (e.g., pressed) to release the locking mechanism 124. Subsequently, the first handle frame 121 is rotated about the second pivot seat 123 (fifth pivot point A5) to fold relative to the second handle frame 122. During this rotation, the push portion 1211 of the first handle frame 121 pushes the driving member 311 downward, causing the driving member 311 to rotate downward about the second pivot point B2 along the first direction W, which is equivalent to rotating the driving member 311 counterclockwise about the second pivot point B2. As the driving member 311 rotates about the second pivot point B2, it causes the first pivot point B1 and the end of the rotating member 312 pivotally connected to the driving member 311 to move upward approximately in the first direction F1, causing the rotating member 312 to rotate clockwise relative to the third pivot point B3. This in turn changes the distance between the second pivot point B2 and the third pivot point B3, thereby causing the front wheel frame 111 to pivot relative to the rear wheel frame 112. Furthermore, the driving member 311 causes the transmission member 313 to rotate counterclockwise about the second pivot point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upward approximately in the first direction F1. This movement causes the first pivot point A1 to rotate clockwise about the second pivot point A2, thereby folding the seat portion 210. 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 the Figure 19 As the second handle frame 122 gradually approaches 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 vehicle frame body 100, the driving member 311, the transmission member 313, and the linkage member 320 cooperate to cause the backrest portion 220 and the seat portion 210 to bend downward about the first pivot point A1, thereby completing the folding of the seat assembly 200 and the backrest portion 220.

[0132] See also Figure 14 and Figure 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, specifically, the first driving section 3111 is pivotally connected to the push portion 1211 of the first push handle frame 121 (see FIG. Figure 13); the second drive section 3112 is pivotally connected to the rear wheel frame 112 at a second pivot point B2, and the second drive section 3112 is pivotally connected to the rotating member 312 at a first pivot point B1. The transmission member 313 is connected to the second drive section 3112 and is arranged at an angle thereto. Specifically, the first drive section 3111 and the second drive section 3112 are arranged at an angle thereto, forming a first angle α1 therebetween. Furthermore, at least when the vehicle frame body 100 is in the deployed state, the opening at the first angle α1 between the first drive section 3111 and the second drive section 3112 is arranged upward along the first direction F1. Specifically, the first angle α1 between the first drive section 3111 and the second drive section 3112 is an obtuse angle. When the vehicle frame body 100 is in the deployed state, the opening at the first angle α1 is arranged diagonally upward along the first direction F1. In this way, when the second drive segment 3112 moves upward (i.e., when the second drive segment 3112 rotates counterclockwise around the second rotation point B2), it can more easily drive the first rotation point B1 to move upward, quickly achieving the front wheel frame 111 relative to the rear wheel frame 112. Of course, in another alternative embodiment, the first angle α1 between the first drive segment 3111 and the second drive segment 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 drive segment 3111 and the second drive segment 3112 can be fixedly connected (such as integrally formed) or detachably connected (such as threaded connection, snap-on connection). This is not specifically limited in the present invention.

[0133] See also Figure 14 and Figure 16 In one embodiment, at least a portion of the transmission member 313 is located on a side of the second drive section 3112 that is away from the opening of the first angle α1. This increases the length of the linkage member 320 and changes the direction of force applied at the pivot point (i.e., A6) between the linkage member 320 and the transmission member 313 when the drive member 311 rotates, thereby increasing the rotational force arm of the linkage member 320. This allows the seat portion 210 to rotate more smoothly about the second pivot point A2. Furthermore, because the pivot point (i.e., A6) between the linkage member 320 and the transmission member 313 is eccentric relative to the second pivot point B2, i.e., the pivot point A6 is located outside the straight line between the first pivot point B1 and the second pivot point B2, the rotation radius of the linkage member 320 relative to the second pivot point B2 is increased, thereby increasing the distance the linkage member 320 moves upward in the first direction F1. This ensures that the seat assembly 200 can be fully folded, 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 with 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 via fasteners such as screws. This is not specifically limited in the present invention.

[0134] See also Figure 16 and Figure 18 In some embodiments, the transmission member 313 includes a first segment 3131 and a second segment 3132 connected to each other, with a second angle α2 formed between the first segment 3131 and the second segment 3132. The first segment 3131 is stacked on the driver 311 and located between the first pivot point B1 and the second pivot point B2. The second segment 3132 is pivotally connected to the linkage member 320. At least when the frame body 100 is in the deployed state, the opening at the second angle α2 faces downward along the first direction F1. Specifically, the first segment 3131 and the second driver segment 3112 are stacked and fixedly connected, with the opening at the second angle α2 facing away from the opening at the first angle α1. More specifically, the linkage member 320 is pivotally connected to the end of the second segment 3132 distal from the first segment 3131. In this way, when the transmission member 313 rotates around the second rotation point B2 together with the driving member 311, it can more easily drive the linkage member 320 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 to avoid the "stuck" phenomenon.

[0135] Considering the above-mentioned frame body 100, seat assembly 200 and folding mechanism 300, we will now combine Figures 13 to 19 The following describes the operating principle of the stroller 1000 in detail.

[0136] See also Figure 13 and Figure 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 push handle frame 121 and the second push handle frame 122 remain relatively fixed, that is, the push portion 1211 also remains relatively fixed. Because the second push handle frame 122, the push portion 1211, the driving member 311, and the rear wheel frame 112 constitute a four-bar linkage structure, when the first push handle frame 121 and the second push handle frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and cannot pivot. In this way, the second push handle frame 122, the driving member 311, and the rear wheel frame 112 remain relatively fixed and cannot rotate relative to each other, ultimately allowing the frame body 100 to be stably maintained in the deployed state. At the same time, because the driving member 311 is fixed, the transmission member 313 and the linkage member 320 are fixed, thereby allowing the seat portion 210 to be stably supported on the first pivot seat 130. In addition, when the frame body 100 is in the expanded 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 on 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. In this way, 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 expanded state.

[0137] See also Figures 13 to 19 When the user needs to move the frame body 100 from the unfolded state (see Figure 13 and Figure 14 ) to the folded state (see Figure 18 and Figure 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, so that the locking portion 12542 deviates 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. In this way, 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 clockwise around the second pivot seat 123 (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 counterclockwise around the second rotation point B2. At this point, the first driving section 3111 of the driving member 311 rotates downward about the second pivot point B2, while the second driving section 3112 of the driving member 311 rotates upward about the second pivot point B2. As the second driving section 3112 rotates, the first pivot point B1 connected to it moves upward. As the first pivot point B1 moves upward, it drives the rotating member 312 upward, causing the rotating member 312 to pivot clockwise about the third pivot point B3. This process reduces the distance between the second pivot point B2 and the third pivot point B3, bringing the front wheel frame 111 and the rear wheel frame 112 closer together, thereby achieving the folding of the frame body 100. Furthermore, during the rotation of the second driving section 3112, it also drives the transmission member 313 to rotate counterclockwise relative to the second pivot point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move generally upward in the first direction F1. This movement drives the first pivot point A1 to rotate clockwise around the second pivot point A2, thereby causing the seat portion 210 to fold. During the folding process of the hand frame 120, the second push handle frame 122 rotates 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 via the flexible cloth cover. Therefore, as the second push handle frame 122 approaches the rear wheel frame 122, it drives the backrest portion 220 to rotate counterclockwise around the first pivot point A1, thereby achieving the folding of the backrest portion 220.

[0138] Of course, when the user needs to switch the frame body 100 from the folded state to the expanded state, they simply rotate the first handle frame 121 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 this rotation, the push portion 1211 of the first handle frame 121 pulls the first drive segment 3111 of the driver 311 upward, causing the entire driver 311 to rotate clockwise around the second pivot point B2. At this time, the first drive segment 3111 of the driver 311 rotates upward around the second pivot point B2, while the second drive segment 3112 of the driver 311 rotates downward around the second pivot point B2. As the second drive segment 3112 rotates, the first pivot point B1 connected to it moves downward. As the first pivot point B1 moves downward, it drives the rotating member 312 downward, causing the rotating member 312 to pivot counterclockwise around the third pivot point B3. This process increases the distance between the second pivot point B2 and the third pivot point B3, thereby moving the front wheel frame 111 and the rear wheel frame 112 away from each other, thereby achieving the deployment of the vehicle frame body 100. Furthermore, during the rotation of the second driving section 3112, it also drives the transmission member 313 to rotate clockwise relative to the second pivot point B2. During this rotation, the transmission member 313 moves generally downward in the first direction F1, causing the linkage member 320 to pivot relative to the transmission member 313 and move generally downward along with the transmission member 313 in the first direction F1. This pulls the third pivot point of the seat portion 210 downward, causing the seat portion 210 to rotate counterclockwise about the second pivot point A2, ultimately causing the seat portion 210 to deploy. During the unfolding of the handlebar frame 120, the second handle frame 122 rotates clockwise 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 is driven to rotate clockwise around the first pivot point A1, thereby achieving the unfolding of the backrest portion 220.

[0139] As can be seen from the above description, in the child stroller 1000 of the present invention, the seat portion 210 and the backrest portion 220 are pivotally connected to each other to form a first pivot point A1, and the seat portion 210 is pivotally connected to the first pivot seat 130 to form a second pivot point A2. The drive assembly 310 in the folding mechanism 300 is pivotally connected between the handle frame 120 and the wheel frame 110, and the linkage member 320 is pivotally connected to the drive 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 drive 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 about the second pivot point A2 through the linkage member 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 simply pivots relative to the wheel frame 110. Under the coordinated action of the drive assembly 310 and the linkage 320, the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2, moving the first pivot point A1 away from the ground. Furthermore, under the action of the second handle frame and the flexible fabric cover, the backrest 220 rotates counterclockwise about the first pivot point A1, moving closer to the ground. In other words, when the stroller body 100 is folded, the folding mechanism 300 drives and coordinates the backrest 220 and seat portion 210 to bend downward about the first pivot point A1. This prevents the loose flexible fabric cover at the first pivot point A1 from contacting the ground, thereby reducing the potential for wear. At the same time, because the drive assembly 310 of the present invention includes a transmission member 313, which is disposed between the first pivot point B1 and the second pivot point B2 on the drive member 311 and on the side of the drive member 311 facing away from the angle α1, 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 direction of force applied at the pivot point A6 between the linkage member 320 and the transmission member 313 during rotation of the drive member 311, thereby increasing the rotational force arm and smoothing the rotation of the seat portion 210 about the second pivot point A2. Furthermore, the protruding transmission member 313 also increases the radius of rotation of the linkage member 320 relative to the second pivot point B2, thereby increasing the distance that the linkage member 320 moves upward approximately in the first direction F1, thereby ensuring that the seat assembly 200 can be fully folded and improving the reliability 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.

[0140] Alternatively, in some alternative embodiments, the first end of the linkage member 320 is pivotally connected to the seat portion 210, and the second end is pivotally connected to the rotating member 312. Specifically, the transmission member 313 is disposed at an angle to the rotating member 312 and is located on the side of the rotating member 312 facing away from the seat assembly 200. When the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 causes the first pivot point B1 to displace in the first direction F1, while simultaneously causing the rotating member 312 to rotate relative to the front wheel frame 111. Therefore, when the second end of the linkage member 320 is pivotally connected to the rotating member 312, the linkage member 320 can still drive the seat portion 210 to rotate about the second pivot axis A2. Furthermore, the transmission member 313 is disposed on the rotating member 312, with the first end of the linkage member 320 pivotally connected to the seat portion 210 and the second end pivotally connected to the transmission member 313. This means that the second end of the linkage member 320 is pivotally connected to the rotating member 312 via 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 .

[0141] When the frame body 100 switches from the unfolded state to the folded state, that is, when the first handle frame 121 bends relative to the second handle frame 122 to fold the handle frame 120, the driving member 311, driven by the push portion 1211, rotates counterclockwise about the second pivot point B2. During this rotation, the first pivot point B1 moves upward in the first direction F1, causing the rotating member 312 to rotate clockwise about the third pivot point B3, which in turn causes the transmission member 313 to rotate clockwise about the third pivot point B3. This causes the linkage member 320 to move upward in the first direction F1 relative to the frame body 100. Consequently, the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2 along the first direction W, effectively rotating the seat portion 210 clockwise about the second pivot point A2 to fold 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 bends relative to the second handle frame 122 to unfold the handle frame 120, the driving member 311, driven by the push portion 1211, rotates clockwise about the second pivot point B2. During this rotation, the first pivot point B1 moves downward in the first direction F1, causing the rotating member 312 to rotate counterclockwise about the third pivot point B3, which in turn causes the transmission member 313 to rotate counterclockwise about the third pivot point B3. This causes the linkage member 320 to move downward in the first direction F1 relative to the frame body 100 as a whole. Consequently, the first pivot point A1 of the seat portion 210 rotates downward about the second pivot point A2 along the first direction W, effectively rotating the seat portion 210 counterclockwise about the second pivot point A2 to unfold the seat portion 210. As can be seen, 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 further described herein.

[0142] In the aforementioned child stroller 1000 , since the wheel frame 110 and the handlebar 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 drive 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 drive 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 drive 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 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. Under the coordinated action of the drive assembly 310 and the linkage 320, the first pivot point A1 of the seat portion 210 rotates upward about the second pivot point A2, that is, the first pivot point A1 moves away from the ground, thereby folding the seat portion 210. Since the handle frame 120 gradually moves toward the ground when the frame body 100 is folded, and the backrest 220 is connected to the handle frame 120 via the flexible fabric cover, during the folding process of the frame body 100, the flexible fabric cover causes the backrest 220 to move downward about the first pivot point A1, which is equivalent to moving the end of the backrest 220 away from the first pivot point A1 toward the ground, thus achieving folding of the backrest 220. 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. In this way, 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. In addition, since the seat assembly 200 is folded (see FIG. Figure 19 ), the seat portion 210 is located at the outermost side (e.g., the frontmost side) in the front-to-back direction of the stroller 1000. Therefore, despite its relatively large size, the seat portion 210 can avoid interference with other structures (such as the handlebar 120) during the unfolding and folding of the seat assembly 200, thereby improving the smoothness of the overall folding of the stroller 1000. Furthermore, when the seat portion 210 is located at the outermost side, the flexible fabric cover accumulated at the pivotal connection between the seat portion 210 and the backrest portion 220 can be prevented from interfering with other structures, thereby making the stroller 1000 of the present invention even smaller when folded.

[0143] The child stroller according to the embodiment of the present invention can effectively prevent the loose cloth cover from contacting the ground when folded.

[0144] In the stroller according to the present invention, the wheel frame and the handlebar frame of the frame body are pivotally connected to each other, thereby enabling the frame body to have two states, an expanded state and a collapsed state, and to switch between these two states. Furthermore, because the seat portion and the backrest portion of 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 handlebar frame and the wheel frame, and the linkage member is pivotally connected to the drive assembly and the seat portion, respectively. Furthermore, when the frame body switches from the expanded state to the collapsed state, the drive assembly can pivot relative to the wheel frame or the handlebar frame and, through the linkage member, drive the first pivot point of the seat portion to rotate upward about the second pivot point. Therefore, when the stroller is placed on the ground and needs to be folded, the handlebar frame only needs to be pivoted relative to the wheel frame. Under the coordinated action of the drive assembly and the linkage, the first pivot point of the seat portion will rotate upward about the second pivot point, that is, the first pivot point will move away from the ground, thereby achieving the folding of the seat. In addition, during this process, the end of the backrest portion away from the first pivot point will move toward the ground. In other words, during the process of the seat portion pivoting about the second pivot point, the backrest portion and the seat portion will bend downward about the first pivot point. This prevents the loose flexible fabric cover at the first pivot point from contacting the ground, thereby reducing the possibility of wear.

[0145] Figure 21 and Figure 22 FIG. 1 shows a child stroller 1000 according to another embodiment of the present invention. 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 bar 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 ). Figure 21 and Figure 22 ) and folded state ( Figure 32 and Figure 33 ) between the basket rod assembly 500 is pivotally connected to the wheel frame 110 and has an extended state (see Figure 21 and Figure 22 ) and the collapsed state ( Figure 32 and Figure 33 ).

[0146] like Figure 23 and Figure 25As shown, the folding mechanism 300 includes a drive assembly 310 and a linkage component 330. The drive assembly 310 is pivotally connected between the handlebar frame 120 and the wheel frame 110 and is movably connected to the basket bar assembly 500 via the linkage component 330. The pivot point of the drive assembly 310 on the wheel frame 110 (specifically, the rear wheel frame 112) can be considered the second rotation point B2 (or second rotation axis). In this embodiment, the linkage component 330 is pivotally connected to the basket bar assembly 500 and the drive assembly 310, respectively. When the frame body 100 switches between the expanded and folded states, the drive assembly 310 rotates relative to the wheel frame 110, causing the linkage component 330 to move integrally relative to the frame body 100 and pivot relative to the drive assembly 310, thereby driving the basket bar assembly 500 to switch between the expanded and folded states. In an alternative embodiment, the linkage component 330 may be movably connected to the basket bar assembly 500 and movably connected to the drive assembly 310. When the frame body 100 switches between the expanded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, causing the linkage component 330 to move as a whole relative to the frame body 100 and drive the basket rod assembly 500 to rotate, thereby driving the basket rod assembly 500 to switch between the extended state and the folded state.

[0147] According to the stroller 1000 and child carrier provided by the present invention, when the stroller 1000 is folded, the frame body 100 is folded directly, causing the drive assembly 310 to directly drive the linkage component 330 to move as a whole relative to the frame body 100, thereby driving the basket rod assembly 500 to switch from an extended state to a folded state. This not only improves the convenience of folding the stroller 1000, but also improves the smoothness of folding the stroller 1000.

[0148] The frame body 100 , the basket rod assembly 500 , and the folding mechanism 300 will be further described below one by one.

[0149] See also Figures 21 to 23 In one embodiment, the frame body 100 may include a wheel frame 110 and a hand frame 120. The wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 that are pivotally connected. The hand frame 120 includes a first push handle frame 121 and a second push handle frame 122 that are pivotally connected.

[0150] 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 embodiment. Therefore, regarding the specific structure and connection method of the front wheel frame 111, please refer to the above description and will not be repeated here.

[0151] See also Figures 21 to 23 The rear wheel frame 112 is, for example, a U-shaped structure, comprising two rear rods 1121 on the left and right sides and a rear crossbar 1122 connected between the two rear rods 1121, with the rear crossbar 1122 extending along the second direction F2. At least one rear wheel seat 621 is mounted at the bottom of the rear wheel frame 112. In this embodiment, two rear wheel seats 621 are mounted at the bottom of the rear wheel frame 112, and the two rear wheel seats 621 are spaced apart in the left-right direction (i.e., the second direction F2). The structure of the rear wheel frame 112 in this embodiment is the same as that of the rear wheel frame 112 in the above-mentioned embodiment. Therefore, regarding the specific structure and connection method of the rear wheel frame 112, please refer to the above description and will not be repeated here.

[0152] See also Figures 23 to 25 The frame body 100 further includes a first pivot seat 130 having a fourth pivot point A4. The front wheel frame 111 and the rear wheel frame 112 are pivotally connected to the fourth pivot point (or fourth pivot axis) A4 via the first pivot seat 130, allowing the front wheel frame 111 to rotate relative to the rear wheel frame 112 about the fourth pivot point A4. Specifically, the upper ends of the two rear links 1121 are pivotally connected to the upper ends of the front links 1111 on the same side, for example, via the first pivot seat 130. This means that the rear links 1121 on the same side can rotate relative to the front links 1111 on the same side about the fourth pivot point A4 of the corresponding first pivot seat 130. This allows the volume of the wheel frame 110 to be changed, allowing the frame body 100 to switch between an expanded state and a collapsed state. More specifically, the first pivot base 130 includes a first base 131 and a second base 132. The first base 131 and the second base 132 are stacked and coaxially pivot about a fourth pivot point A4. The connecting portion of the first base 131 is connected to the front rod 1111, and the connecting portion of the second base 132 is connected to the rear rod 1121.

[0153] See also Figures 23 to 25The rider frame 120 can, for example, be pivotally connected to the wheel frame 110 via a first pivot base 130 and can rotate about a fourth pivot point A4. Specifically, the first pivot base 130 also includes a third base 133. The third base 133 is stacked with the second base 132 and the first base 131, and all three can coaxially pivot about the fourth pivot point A4. The connecting portion of the third base 133 is connected to the rider frame 120.

[0154] See also Figure 21 and Figure 22 The handlebar frame 120 may further include a second pivot seat 123 having 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 via the second pivot seat 123. This is equivalent to the first support rod 1212 and the second support rod 1221 on the same side being pivotally connected via the second pivot seat 123. The first support rod 1212 can rotate relative to the second support rod 1221 about the fifth pivot point A5. Specifically, the second pivot seat 123 includes a fixed seat body 1231 and a pivoting seat body 1232.

[0155] 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.

[0156] See also Figure 26 、 Figure 28 and Figure 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 drive assembly 310 is pivotally connected 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 expanded 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 drive section 3111 of the drive assembly 310 and a partial frame body of the rear wheel frame 112.

[0157] See also Figure 21 、 Figure 34 and Figure 35In one embodiment, the frame body 100 further includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is disposed within the second pivot seat 123. The locking mechanism 124 has a locked state that restricts relative rotation between the first push handle frame 121 and the second push handle frame 122, and a released state that allows relative rotation between the first push handle frame 121 and the second push handle frame 122. The release mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locked state and the released state. In this embodiment, when the frame body 100 is in the deployed 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 Figure 32 Of course, in another alternative embodiment, when the frame body 100 is in the expanded state, the angle α3 between the first push handle frame 121 and the second push handle frame 122 can be an obtuse angle or an acute angle.

[0158] See also Figure 34 and Figure 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 within the pivoting body 1232, while the locking recess 1242 is formed on the fixed body 1231. When the locking mechanism 124 is in the locked state, the locking member 1241 is inserted into the locking recess 1242 to restrict the pivoting body 1232 from rotating relative to the fixed body 1231. When the locking mechanism 124 is in the unlocked state, the locking member 1241 retracts from the locking recess 1242, allowing the pivoting body 1232 to rotate relative to the fixed body 1231.

[0159] Continue to see Figure 34 and Figure 35The release mechanism 125 is disposed 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 locked and unlocked states, thereby restricting or allowing relative rotation between 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 return member 12530. 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 release rope 12520 can pull the locking member 1241 to move away from the locking recess 1242. The elastic return member 12530 abuts against the locking member 1241, driving the locking member 1241 to reset, thereby maintaining the locking member 1241 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, on the handle rod 1213. The release rope 12520 is located between the handle rod 1213 and the first support rod 1212 and connected between the release operating member 12510 and the locking member 1241. Of course, in alternative embodiments, the release operating member 12510 may also be located on the first support rod 1212 or the second support rod 1221, which is not specifically limited here.

[0160] Figures 26 to 32 The folding process of the frame body 100 is shown. Figure 26 and Figure 27 The child stroller 100 is in an unfolded state; Figure 28 and Figure 29 The child stroller 100 is in a first transition state between the unfolded state and the folded state; Figure 30 and Figure 31 The child stroller 100 is in a second transition state between the unfolded state and the folded state; Figure 32The child stroller 100 is in a folded state. When the child stroller 1000 or the frame body 100 of this embodiment needs to be folded, the release mechanism 125 is operated (e.g., pressed) to put the locking mechanism 124 in the released state. Subsequently, the first handle frame 121 is rotated about the second pivot seat 123 (i.e., about 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 drive assembly 310 downward, causing the drive assembly 310 to rotate in a clockwise direction W2 about the second rotation point B2, 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. At the same time, 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 the Figure 32 and Figure 33 folded state.

[0161] See also Figure 23 and Figure 25 In one embodiment, the basket bar assembly 500 can be used to support or mount a shopping basket (not shown), allowing users to place some personal items in the basket to reduce the burden of carrying. Specifically, the basket bar assembly 500 may include a pivotally connected front tube 510 and a rear tube 520. The front tube 510 is pivotally connected to the front wheel frame 111 at a seventh pivot point (or seventh pivot axis) A7, and is pivotally connected to the rear tube 520 at a fifth rotation point (or fifth rotation axis) B5. The rear tube 520 is pivotally connected to the rear wheel frame 112 at an eighth pivot point (or eighth pivot axis) A8. Thus, by rotating the front tube 510 about the seventh pivot point A7, the rear tube 520 about the eighth pivot point A8, and the front tube 510 relative to the rear tube 520 about the fifth rotation point B5, the basket bar assembly 500 becomes foldable, thereby enabling it to switch between an extended and 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.

[0162] Specifically, in this embodiment, Figure 23 and Figure 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. Figure 35The two rear basket rods 521 are each pivotally connected to the rear rod 1121 on the same side of the rear wheel frame 112 at an eighth pivot point A8, and are each pivotally connected to the second end of the front basket rod 513 on the same side at a fifth pivot point B5. The left and right sides of the basket rod assembly 500 are respectively pivotally connected to the left and right sides of the frame body 100, thereby improving the stability of the basket rod assembly 500 in supporting the basket.

[0163] In order to facilitate the rotation of the rear tube 520 relative to the front tube 510 (ie, to facilitate the bending of the basket rod assembly 500), and to improve the smoothness of switching the basket rod assembly 500 from the unfolded state to the folded state, in one embodiment, Figure 25 As shown, the front tube 510 includes a first tube section 511 and a second tube section 512 arranged at an angle. Specifically, each front basket bar 513 includes a first tube section 511 and a second tube section 512 arranged at an angle, equivalent to each front basket bar 513 forming an L-shaped structure. The end of the first tube section 511 facing away from the second tube section 512 is pivotally connected to the front wheel frame 111 at a seventh pivot point A7, while the end of the second tube section 512 facing away from the first tube section 511 is pivotally connected to the rear tube 520 at a fifth pivot point B5. The opening at the angle α4 between the first tube section 511 and the second tube section 512 is positioned downward along the first direction F1. This prevents a dead point in the hinge at the fifth pivot point B5, improving the bending reliability of the front tube 510 and rear tube 520. It should be noted that the first direction F1 refers to the vertical direction, which in this embodiment refers to the height of the frame body 100 when the frame body 100 is in the deployed state.

[0164] See also Figure 26 and Figure 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 Figure 27 ). See Figure 32 and Figure 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 Figure 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. Figure 27 、 Figure 29 、 Figure 31 as well as Figure 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.

[0165] It should be noted that the aforementioned “driving assembly 310 is pivotally connected between the rider frame 120 and the wheel frame 110 ” includes at least two examples.

[0166] See also Figures 26 to 29 In one example, the drive assembly 310 in the folding mechanism 300 is pivotally connected between the rear wheel frame 112 and the rider frame 120. The linkage component 330 is pivotally connected to the drive assembly 310 and the rear tube 520, respectively, to drive the rear tube 520 to rotate about the eighth pivot point A8 and to rotate the rear tube 520 relative to the front tube 510 about the fifth pivot point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111. In one example, the drive assembly 310 is a rod-shaped structure and includes a first drive segment 3111 and a second drive segment 3112. The first drive segment 3111 and the second drive segment 3112 each have a first end and a second end. The first end of the first drive segment 3111 and the first end of the second drive segment 3111 are spaced apart from each other, and the second end of the first drive segment 3111 and the second end of the second drive segment 3111 are connected together.

[0167] 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 the 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 drive assembly 310. In this way, when the frame body 100 is in the expanded state (see Figure 26 and Figure 27), the second driving section 3112 of the driving assembly 310 can be considered to be located between the front wheel frame 111 and the rear wheel frame 112, that is, the pivot point C1 between the linkage component 330 and the driving assembly 310 is located between the front wheel frame 111 and the rear wheel frame 112. Therefore, when the driving assembly 310 pivots about the second rotation point B2, the driving assembly 310 drives the linkage component 330 to move as a whole relative to the rear wheel frame 112 about the pivot point B2, causing the linkage component 330 to pivot relative to the driving assembly 310, thereby driving the rear tube 520 and the fifth rotation point B5 of the front tube 510 to move as a whole (for example, toward the direction approaching the first pivot seat 130), thereby causing the rear tube 520 to rotate about the eighth pivot point A8 and the front tube 510 to rotate about the seventh pivot point A7, thereby causing the distance between the eighth pivot point A8 and the seventh pivot point A7 to change, causing the rear wheel frame 112 to pivot 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.

[0168] Continue to see Figures 26 to 29 The drive assembly 310 is pivotally connected between the rider frame 120 and the rear wheel frame 112 (specifically, the rear rod 1121), forming a second pivot point (or second rotation axis) B2 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 drive assembly 310 and the rear tube 520 (specifically, the rear basket rod 521), respectively. The pivot point C2 between the linkage component 330 and the rear tube 520 (rear basket rod 521) is located between the fifth pivot point B5 and the eighth pivot point A8, with the pivot point C2 being closer to the fifth pivot point B5.

[0169] Of course, in another alternative example (not shown), the drive assembly 310 may also be pivotally connected between the front wheel frame 111 and the rider frame 120. Specifically, the first drive section 3111 of the drive assembly 310 is pivotally connected to the rider frame 120, and the second drive section 3112 of the drive assembly 310 is pivotally connected to the front wheel frame 111. The linkage component 330 is pivotally connected to the drive assembly 310 and the front tube 510, respectively, to drive the front tube 510 to rotate about the seventh pivot point A7 and to rotate the front tube 510 relative to the rear tube 520 about the fifth pivot point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111.

[0170] See again Figures 26 to 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 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.

[0171] Specifically, the first angle α1 between the first drive section 3111 and the second drive section 3112 is an obtuse angle. When the frame body 100 is in the expanded state, the opening of the first angle α1 is arranged diagonally upward along the first direction F1. Of course, in another alternative embodiment, the first angle α1 between the first drive section 3111 and the second drive section 3112 can be a right angle or an acute angle, which can be specifically set according to actual needs. When the handle frame 120 is folded, that is, when the first push handle frame 121 is rotated relative to the second push handle frame 122 about the second pivot seat 123, the push portion 1211 pushes the first drive section 3111 of the drive assembly 310 to rotate downward about the second rotation point B2, while the second drive section 3112 rotates upward about 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 between the two is arranged upward, which facilitates 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, avoiding interference with the seat assembly 200 mentioned below during folding, thereby affecting the reliability of the folding of the entire frame body 100.

[0172] See also Figures 26 to 29 In one embodiment, the first drive segment 3111 of the drive assembly 310 is longer than the second drive segment 3112. The first and second drive segments 3111, 3112, form a lever structure (seesaw structure) relative to the second pivot point B2. Because the first drive segment 3111 has a longer lever arm, operating the first drive segment 3111 makes folding the basket rod assembly 500 easier and more labor-saving.

[0173] See also Figure 27 、 Figure 29 and Figure 31In one embodiment, the driving assembly 310 is provided with a stop portion 317. When the basket rod assembly 500 is in the extended state, the stop portion 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 the extended state. Specifically, the stop portion 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 Figure 27 As shown, when the basket bar assembly 500 is in the expanded state, the stopper 317 is located on the upper left side of the linkage member 330. This restricts the linkage member 330 from further rotation in the clockwise direction W2 about the pivot point C1, causing the linkage member 330 to abut against the stopper 317 and remain stationary. This, in turn, keeps the linkage member 330 and the rear tube 520 stationary relative to each other, and the rear tube 520 stationary relative to the front tube 510, the rear wheel frame 112, and so on, allowing the frame body 100 to remain stably in the expanded state. Furthermore, when the basket bar assembly 500 switches from the expanded state to the folded state, the stopper 317 prevents user misoperation. Specifically, when the user wishes to fold the basket bar assembly 500, they can rotate the drive assembly 310 in the clockwise direction W2 about the second pivot point B2, which is equivalent to pushing the first drive section 3111 of the drive assembly 310 downward. Therefore, after the stopper 317 is provided, it can abut against the linkage component 330, forcing the user to push the first driving section 3111 of the drive assembly 310 downward, thereby restricting the user from pushing the first driving section 3111 of the drive assembly 310 upward. More specifically, when the frame body 100 is in the collapsed 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. This restricts the linkage component 330 from further rotating counterclockwise in the W1 direction about the pivot point C1, thereby maintaining the basket rod assembly 500 in the folded state. Similarly, when the basket rod assembly 500 switches from the folded state to the expanded state, the stopper 317 also prevents the user from making misoperations. Specifically, when the user needs to unfold the basket rod assembly 500, the drive assembly 310 can be rotated counterclockwise W1 about the second rotation point B2, which is equivalent to pushing the first drive section 3111 of the drive assembly 310 upward. Therefore, when the stopper 317 is located to the right of the linkage component 330 and abuts against the linkage component 330, the user can only push the first drive section 3111 of the drive assembly 310 upward, restricting the user from pushing the first drive section 3111 of the drive assembly 310 downward.

[0174] See also Figure 21 and Figure 23 In one embodiment, the stroller 1000 further includes a seat assembly 200. The seat assembly 200 can be directly used as a seat 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. Figures 21 to 23 When the frame body 100 is in the unfolded state, the seat assembly 200 is located above the basket rod assembly 500 (see Figure 21 and Figure 22 ). The seat assembly 200 is pivotally connected to the first pivot seat 130 and the drive 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 drive 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 drive assembly 310 rotates and drives the seat assembly 200 to rotate relative to the first pivot seat 130. At the same time, the drive 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 Figure 29 and Figure 31 ).

[0175] The seat assembly 200 is generally parallel to the rear tube 520, and the second pivot axis A2 and the seventh rotation axis B7 are both generally parallel to the fourth pivot axis A4. This allows the seat assembly 200 and the basket bar assembly 500 (specifically, the rear tube 520) to remain generally parallel during the transition of the frame 100 from the deployed to the collapsed state, preventing interference between the seat assembly 200 and the basket bar assembly 500.

[0176] See also Figure 22 and Figure 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 the vehicle or directly support the 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 Figure 23The support rod 240 is provided 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 other embodiments not shown, the seat assembly 200 may not be provided with the support rod 240, and this invention is not limited thereto.

[0177] See also Figure 23 and Figure 25 In one embodiment, the seat tube assembly 230 has a U-shaped structure, for example, including left and right first seat tubes 231 and a second seat tube 232 connected between the two first seat tubes 231, with the second seat tube 232 extending in the second direction F2. The two first seat tubes 231 are pivotally connected to the first pivot base 130 on the same side. A 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. This allows the seat tube assembly 230 to be more stably mounted on the vehicle frame 100, thereby improving the stability of the seat assembly 200 in supporting the vehicle or child. Of course, in other embodiments (not shown), the seat tube assembly 230 may not include the second seat tube 232, and this is not a limitation of the present invention.

[0178] The following combination Figures 26 to 31 The working principle of the folding mechanism 300 will be described below.

[0179] See also Figure 26 and Figure 27When the vehicle frame body 100 is in the deployed state, the locking mechanism 124 is in the locked state, so 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 form a four-bar linkage 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. In this way, the second handle frame 122, the drive assembly 310, and the rear wheel frame 112 remain relatively fixed and cannot rotate, ultimately allowing the vehicle frame body 100 to stably remain in the deployed state. At the same time, because the seat tube assembly 230, rear wheel frame 112, and drive assembly 310 form a nearly triangular structure, when the rear wheel frame 112 and drive assembly 310 remain stationary, the seat assembly 200 can remain in the deployed state and always positioned above the basket bar assembly 500. Furthermore, when the frame body 100 is in the deployed state, the basket bar 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, and at least a portion of the basket bar assembly 500 is positioned between the front and rear wheel frames 111, 112. The front tube 510 and the rear tube 520 are generally in the same plane. Thus, the front wheel frame 111, the rear wheel frame 112, and the basket bar assembly 500 can be considered a triangular structure as a whole. This allows the front wheel frame 111, the rear wheel frame 112, and the basket bar assembly 500 to remain relatively fixed, thereby stably maintaining the frame body 100 in the deployed state.

[0180] See also Figures 26 to 31 When the user needs to move the frame body 100 from the unfolded state (see Figure 26 and Figure 27 ) to the folded state (see Figure 30 and Figure 31) is switched, the release mechanism 125 is pressed to switch the locking mechanism 124 to the unlocked state. Subsequently, the first handle frame 121 is rotated counterclockwise W1 about the second pivot seat 123 (or about the fifth pivot point A5) to fold relative to the second handle frame 122. During this rotation, the push portion 1211 of the first handle frame 121 pushes the drive assembly 310 downward, causing the drive assembly 310 to rotate clockwise W2 about the second pivot point B2. At this time, the first driving section 3111 of the driving assembly 310 rotates downward about the second rotation point B2, and the second driving section 3112 of the driving assembly 310 rotates upward about the second rotation point B2. 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 520 also moves upward, causing the rear tube 520 to pivot about the eighth pivot point A8 in the clockwise direction W2. As a result, the fifth rotation point B5 between the rear tube 520 and the front tube 510 moves upward, thereby driving the front tube 510 to rotate about 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. The distance between the seventh pivot point A7 and the eighth pivot point A8 decreases, eventually bringing the front wheel frame 111 and the rear wheel frame 112 closer to each other, allowing the frame body 100 to be folded. During this process, one end of the linkage member 330 rotates counterclockwise (W1) relative to the drive assembly 310 about the pivot point C1, while the other end of the linkage member 330 rotates counterclockwise (W1) relative to the rear tube 520 about the pivot point C2. This adjusts the angle and spacing between the drive assembly 310 and the rear tube 520, thereby providing freedom of movement between the drive assembly 310 and the rear tube 520 and allowing the drive assembly 310 to pivot the rear tube 520 when it rotates. Because the seat assembly 200 is pivotally connected to the drive assembly 310 and the first pivot seat 130, respectively, the drive assembly 310 rotates clockwise (W2) about the second pivot point B2, driving the seat assembly 200 to rotate clockwise (W2) relative to the first pivot seat 130, thereby achieving synchronous folding of the seat assembly 200 and the basket bar assembly 500.

[0181] 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 can be rotated counterclockwise W1 about the second pivot seat 123 (or about the fifth pivot point A5) to unfold relative to the second handle frame 122 without pressing the release mechanism 125. During this rotation, the push portion 1211 of the first handle frame 121 pushes the drive assembly 310 upward, causing the drive assembly 310 to rotate counterclockwise W1 about the second pivot point B2. At this time, the second drive section 3112 of the drive assembly 310 rotates downward about the second pivot point B2, thereby pushing the entire linkage component 330 downward, and further pushing the pivot point C2 between the linkage component 330 and the rear tube 520 downward. As a result, the rear tube 520 rotates counterclockwise W1 about the eighth pivot point A8, and the fifth pivot point B5 of the front and rear tubes 510 and 520 moves downward, driving the front tube 510 to rotate clockwise W2. This in turn causes the front and rear tubes 510 and 520 to extend relative to each other, increasing the distance between the seventh and eighth pivot points A7 and A8. Ultimately, this pushes the front and rear wheel frames 111 and 112 away from each other, allowing the frame body 100 to unfold. During this process, one end of the linkage member 330 pivots clockwise W2 about the pivot point C1, and the other end of the linkage member 330 pivots clockwise W2 about the pivot point C2, adjusting the angle and spacing 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 it rotates. Since the seat assembly 200 is pivotally connected to the drive assembly 310 and the first pivot seat 130 respectively, when the drive 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 deployment of the seat assembly 200 and the basket rod assembly 500.

[0182] See also Figures 35 to 38 In one embodiment, the stroller 1000 further includes a folding aid 600. The folding aid 600 is, for example, a folding webbing. The support rod 240 is spaced apart from the seat plate 212 and forms a passage 250. The folding aid 600 is connected to the basket bar assembly 500 and passes through the passage 250. During the folding process of the frame 100, the folding aid 600 is operated to drive the basket bar assembly 500 from an extended state to a folded state. When the frame 100 is in the extended state, the folding aid 600 is located below the seat plate 212, preventing the folding aid 600 from being exposed and affecting the aesthetics of the stroller. Furthermore, the folding aid 600 is supported by the support rod 240. When not in use, it is stored and placed on the support rod 240 to prevent it from falling to the ground and interfering with the rear wheels 622 when the stroller 1000 is being pushed.

[0183] In this embodiment, if Figure 25 、 Figure 26 、 Figure 36 as well as Figure 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. Thus, when folding the frame body 100, the user can pull the folding webbing upward in the first direction F1. The folding webbing applies an upward force to the end of the rear tube 520 near the front tube 510, causing the rear tube 520 to rotate in the clockwise direction W2 about the eighth pivot point A8. This in turn drives the basket bar assembly 500 and the frame body 100 to fold quickly, thereby improving the smoothness of folding the frame body 100. More specifically, the folding webbing is connected at the pivot point C2 between the connector and the rear tube 520.

[0184] Of course, in another alternative embodiment (not shown), the folding webbing could be connected to the front tube 510, with the connection point located at the end of the front tube 510 near the fifth pivot point B5. In this way, by pulling the folding webbing upward, the front tube 510 can be rotated counterclockwise about the seventh pivot point A7, thereby rapidly folding the basket bar assembly 500 and the frame body 100. Furthermore, in another alternative embodiment, the folding webbing could be directly connected to the fifth pivot point B5, or alternatively, connected to the second drive section 3112 of the drive assembly 310, although this is not specifically limited by the present invention.

[0185] As can be seen from the above description, in the stroller 1000 of the present invention, both the wheel frame 110 and the handle frame 120 are foldable, and the wheel frame 110 as a whole can be folded relative to the handle frame 120. Therefore, the frame body 100 can freely switch between an extended state and a folded state. Since the basket rod assembly 500 is pivotally connected to the wheel frame 110 and has an extended state and a folded state, the drive assembly 310 is pivotally connected between the handle frame 120 and the wheel frame 110 and is movably connected to the basket rod assembly 500 via the linkage member 330. Therefore, when the stroller 1000 of the present invention is folded, the drive assembly 310 can be directly moved / rotated relative to the frame body 100 by folding the frame body 100, which drives the linkage member 330 to pivot, thereby driving the basket rod assembly 500 to rotate and switch the basket rod assembly 500 from the extended state to the folded state. In this way, not only the convenience of folding the stroller 1000 is improved, but also the smoothness of folding the stroller 1000 is improved. At the same time, since the seat assembly 200 in the present invention is pivotally connected between the wheel frame 110 and the drive assembly 310, the seat assembly 200 is roughly parallel to the rear tube 520 in the basket rod assembly 500, and the structural arrangement of the drive assembly 310 and the linkage component 330 (specifically, the drive assembly 310 is pivotally connected between the rear wheel frame 112 and the handlebar 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 rotate. Bending and folding (the front tube body 510 and the rear tube body 520 fold relative to each other) will allow the basket rod assembly 500 to fold more smoothly and approach the rear wheel frame 112. At the same time, the drive 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.

[0186] The frame body according to the embodiment of the present invention can improve the smoothness and convenience of folding the child stroller, thereby reducing the difficulty of folding the child stroller.

[0187] In the stroller according to the present invention, since the wheel frame and the handle frame can be folded relative to each other 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.

[0188] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0189] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended 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 expanded 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 includes a drive assembly and a linkage member, wherein the drive assembly is pivotally connected between the rider frame and the wheel frame, and the linkage member is pivotally connected to the drive 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 a first direction around the second pivot point through the linkage member, thereby driving the seat assembly to fold.

2. The stroller according to claim 1, wherein: 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 rotation 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 portion rotates upward around the second pivot point along the first direction.

3. The stroller according to claim 2, characterized in that: The driving assembly further includes a transmission member, which is disposed 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 expanded 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 to 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, wherein: The driving assembly includes a driving member and a transmission member, 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 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 includes 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 the first rotation point, and the transmission member is provided on the second driving section; Optionally, the transmission member is integrally formed on the driving member.

7. The stroller according to claim 6, characterized in that: A first angle is formed between the first driving section and the second driving section, and at least when the frame body is in the unfolded state, 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 segment and a second segment connected to each other, and a second angle is formed between the first segment and the second segment, the first segment is stacked on the driving member and is located between the first rotation point and the second rotation point, the second segment is pivotally connected to the linkage member, and at least when the frame body is in the expanded state, the opening of the second angle is set 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 segment away from the first segment.

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 further comprises: a locking mechanism disposed in the second pivot seat, the locking mechanism having a locked state for restricting relative rotation of the first handle frame and the second handle frame and a released state for allowing relative rotation of the first handle frame and the second handle frame; and The release mechanism is provided on the handlebar frame and is operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the release state.

11. The stroller according to claim 10, characterized in that: The second pivot seat 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 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 locked state, the locking piece is inserted into the locking recess; when the locking mechanism is in the unlocked state, the locking piece is retracted from the locking recess; Optionally, the release mechanism includes: 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 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 is pivotable 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 the moving path of the first operating member to restrict the 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 the first operating member to move.

12. The stroller according to claim 9, wherein: The child stroller further comprises: A first pivot seat, the wheel frame and the rider frame are coaxially pivoted at a fourth pivot point through the first pivot seat, Wherein, the driving assembly and the wheel frame are pivotally connected at a second rotation point; The first handle frame has a push portion at the end close to the second handle frame, the driving assembly is pivotally connected between the push portion and the wheel frame, and a fourth rotation point is formed on the push portion, the fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-bar structure, and the frame body is switched between the expanded state and the folded state through the four-bar structure.

13. A baby stroller, 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 expanded 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 includes a driving assembly and a linkage component, wherein the driving assembly is pivotally connected between the handle 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, wherein: 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 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, the 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, the 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 the 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, wherein: 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 about 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, so as to allow the rear tube body to rotate about the eighth pivot point and the front tube body to rotate about the seventh pivot point.

17. The stroller according to claim 16, wherein: The drive assembly comprises a first drive section and a second drive section, the first drive section being pivotally connected to the rider frame, the second drive section being pivotally connected to the linkage component, and the second rotation point being located between the first drive section and the second drive section; Optionally, the first driving segment and the second driving segment are arranged at an angle, and an opening of the first angle between the first driving segment and the second driving segment is arranged upward along a first direction.

18. The stroller according to claim 13, wherein: 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; Optionally, the drive assembly and the wheel frame are pivotally connected at a second rotation point. The stop portion is arranged on the 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.

19. The stroller according to claim 13, wherein: The child stroller further includes a folding auxiliary component 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, wherein: The child stroller further comprises: a first pivot seat, through which the wheel frame and the rider frame are coaxially pivoted at a fourth pivot point; and a seat assembly pivotally connected to the first pivot seat and the drive assembly; When the frame body switches from the expanded 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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