TW202513374A - Stroller - Google Patents

Abstract

The pre sent application relates to a stroller, including: a frame body including a wheel frame and a handle frame that are pivotally connected to each other so that the frame body is switchable between an unfolded state and a folded state; a seat assembly including a seat part and a backrest part that are pivotally connected to each other at a first pivot point, and the seat part being pivotally connected to the frame body at a second pivot point; and a folding mechanism including a driving assembly and a linkage member. The driving assembly is pivotally connected between the handle frame and the wheel frame. The linkage member is pivotally connected to the driving assembly and the seat part. 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 handle frame, and drives the first pivot point of the seat part to rotate upwards in a first rotating direction around the second pivot point through the linkage member, to drive the seat assembly to fold.

Description

Strollers

The present application relates to the technical field of wheeled mobile devices, and more particularly to a baby stroller.

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

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

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

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

According to one aspect of the present application, a baby stroller is provided, comprising: a frame body, comprising a wheel frame and a handle frame, wherein the handle frame and the wheel frame are pivotally connected to each other so that the frame body can be switched between an unfolded state and a folded state; a seat assembly, comprising a seat portion and a backrest portion, wherein the seat portion and the backrest portion are pivotally connected to each other to form a first pivot point, and the seat portion is pivotally connected to the frame body to form a second pivot point; and a folding mechanism, comprising a drive assembly The bicycle comprises a driving assembly and a linkage, wherein the driving assembly is pivotally connected between the rider frame and the wheel frame, and the linkage is pivotally connected to the driving assembly and the seat portion 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 rider frame and drives the first pivot point of the seat portion to rotate upward along a first direction around the second pivot point through the linkage, thereby driving the seat assembly to fold.

In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to each other; the driving assembly includes a driving member and a rotating member, the driving member is pivotally connected between the rider frame and the rear wheel frame, one end of the rotating member is pivotally connected to the front wheel frame, and the other end is pivotally connected to the driving member at a first rotating point, the first end of the linkage member is pivotally connected to the seat portion, and the second end is pivotally connected to the driving member or the rotating member; when When the frame body is in the unfolded state, the first pivot point is located between the front wheel frame and the rear wheel frame; and when the frame body switches from the unfolded state to the folded state, the 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 part rotates upward along the first direction around the second pivot point.

In one embodiment, the driving assembly further includes a transmission member, which is arranged on the driving 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.

In one embodiment, the transmission member is arranged at an angle to the drive member or the rotating member.

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

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

In one embodiment, the driving assembly includes a driving member and a transmission member, the driving member is pivoted between the rider frame and the wheel frame, the transmission member is arranged on the driving member, the second end of the linkage member is pivoted to the transmission member, and the first end of the linkage member is pivoted to the seat part; when the frame body switches from the unfolded state to the folded state, the driving member drives the transmission member to pivot relative to the wheel frame, and the transmission member drives the linkage member to move upward along the first direction, so that the first pivot point of the seat part rotates upward along the first direction around the second pivot point.

In one embodiment, the transmission member is arranged on the drive member; the drive member includes a first drive section and a second drive section connected to each other, the first drive section is pivoted to the rider frame, the second drive section is pivoted to the rear wheel frame of the wheel frame at the second rotation point, the second drive section is pivoted to the rotating member at the first rotation point, and the transmission member is arranged on the second drive section.

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

In one embodiment, a first angle is formed between the first driving segment and the second driving segment, and at least when the frame body is in the unfolded state, the opening of the first angle is arranged upward along a first direction; at least a portion of the transmission member is located on a side of the second driving segment away from the opening of the first angle.

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 located between the first pivot point and the second pivot point. The second segment is pivotally connected to the linkage, and at least when the frame body is in the unfolded state, the opening of the second angle is arranged downward along the first direction.

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

In one embodiment, the linkage 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.

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

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 with the first pivot seat to form the second pivot point, and the second pivot point is coaxially or staggered with the fourth pivot point.

In one embodiment, the handle frame includes a first handle frame, a second handle frame and a second pivot seat, the second pivot seat has a fifth pivot point, the second handle frame is pivoted with the wheel frame and pivoted with the first handle frame at the fifth pivot point through the second pivot seat, and the drive assembly is pivoted between the first handle frame and the wheel frame.

In one embodiment, the handlebar 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 handlebar frame and the second handlebar frame and a releasing state for allowing the first handlebar frame and the second handlebar frame to rotate relative to each other; and a releasing mechanism disposed on the handlebar frame and operably connected to the locking mechanism to allow the locking mechanism to switch between the locking state and the releasing state.

In one embodiment, the second pivot seat includes a fixed seat body and a pivot seat body, the fixed seat body and the pivot seat body can pivot around the fifth pivot point, one of the fixed seat body and the pivot seat body is connected to the first handle frame, and the other is connected to the second 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 locking state, the locking piece is inserted into the locking recess, and when the locking mechanism is in the unlocking state, the locking piece retracts from the locking recess.

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

In one embodiment, the release mechanism further includes: a second operating member, which 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 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 limit 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.

In one embodiment, the release mechanism further includes: a first reset member, which abuts against the second operating member and is used to bias the operating portion so that the second operating member can pivot toward the second locking position.

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 penetrating the bottom wall of the accommodating cavity and a second opening penetrating the side wall of the accommodating cavity, the first operating member is 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 is 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.

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, the driving wheel being 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 being abutted against the operating portion of the second operating member, and the other end of the first reset member being abutted against the second mounting seat.

In one embodiment, the drive assembly is pivoted to the wheel frame at a second pivot point; the first handle frame has a push portion at the end near the second handle frame, the drive assembly is pivoted between the push portion and the wheel frame, and a fourth pivot point is formed on the push portion, the fourth pivot point, the second pivot 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 realize the switching of the frame body between the expanded state and the folded state.

According to one aspect of the present application, a 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 vegetable basket rod assembly pivotally connected to the wheel frame and having an extended state and a folded state; and a folding mechanism, comprising a driving assembly and a linkage component, the driving assembly being pivotally connected between the handle frame and the wheel frame and movably connected to the vegetable basket rod assembly through the linkage component; when the frame body switches between the expanded state and the folded state, the driving assembly pivots relative to the wheel frame or the handle frame and drives the vegetable basket rod assembly to switch between the expanded state and the folded state through the linkage component.

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

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 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 connecting 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 connecting component.

In one embodiment, the front tube body includes a first tube segment and a second tube segment arranged at an angle, one end of the first tube segment away from the second tube segment is pivoted to the front wheel frame at the seventh pivot point, one end of the second tube segment away from the first tube segment is pivoted to the rear tube body at the fifth rotation point, and the opening of the angle between the first tube segment and the second tube segment is arranged downward along the first direction.

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 a sharp angle or substantially 0 degrees.

In one embodiment, the drive assembly forms a second pivot point on the rear wheel frame, and the connecting component is pivoted to the rear tube and the drive assembly respectively. When the drive assembly pivots around the second pivot 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 to allow the rear tube to rotate around the eighth pivot point and the front tube to rotate around the seventh pivot point.

In one embodiment, the drive assembly has a first drive segment and a second drive segment, the first drive segment is pivoted to the rider frame, the second drive segment is pivoted to the connecting component, and the second pivot point is located between the first drive segment and the second drive segment.

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

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 connecting member, and the pivot point between the connecting member and the rear tube body is located between the fifth pivot 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 connecting member, and the pivot point between the connecting member and the front tube body is located between the fifth pivot point and the seventh pivot point.

In one embodiment, the driving assembly is provided with a stopper, and when the basket rod assembly is in the extended state, the stopper is used to abut against the linkage component to limit the linkage component from pivoting relative to the driving assembly, thereby keeping the basket rod assembly in the extended state.

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

In one embodiment, the stroller further includes a folding assisting member, which is connected to the vegetable basket rod assembly to allow the vegetable basket rod assembly to be driven to switch to the folded state by operating the folding assisting member.

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 pivot point, and the rear tube body is pivotally connected to the rear wheel frame at an eighth pivot point; the folding auxiliary part is connected to the rear tube body, and the connection point of the two is located between the eighth pivot point and the fifth pivot point; or, the folding auxiliary part is connected to the front tube body, and the connection point of the two is located between the seventh pivot point and the fifth pivot point; or, the folding auxiliary part is connected to the fifth pivot point.

In one embodiment, the 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, which is pivotally connected to the first pivot seat and the drive assembly respectively; when the frame body switches from the unfolded state to the folded state, the drive assembly drives the seat assembly to rotate relative to the first pivot seat to avoid interference with the folding process of the basket assembly.

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

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

In one embodiment, the seat assembly includes a seat tube assembly and a seat plate, wherein the seat tube assembly is pivotally connected between the first pivot seat and the drive assembly, and the seat plate is mounted on the seat tube assembly.

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

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

In one embodiment, the handle frame includes a first handle frame, a second handle frame and a second pivot seat, the second pivot seat has a fifth pivot point, the second handle frame is pivoted with the wheel frame and pivoted with the first handle frame at the fifth pivot point through the second pivot seat, and the first driving section of the driving assembly is pivoted to the first handle frame.

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

In one embodiment, the drive assembly is pivoted to the wheel frame at a second pivot point; the first handle frame has a push portion at the end near the second handle frame, the drive assembly is pivoted between the push portion and the wheel frame, and a fourth pivot point is formed on the push portion, the fourth pivot point, the second pivot 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 realize the switching of the frame body between the expanded state and the folded state.

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

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

FIG. 1 to FIG. 3 show a baby stroller 1000 provided according to an embodiment of the present invention. The overall structure of the baby stroller 1000 is substantially bilaterally symmetrical, and the baby stroller 1000 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 baby stroller 1000.

Please refer to 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 switched between an unfolded state (see Figures 1 and 2) and a folded state (see Figures 18 and 19). Specifically, the wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 that are pivotally connected. The handle frame 120 includes a first handle frame 121 and a second 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 handle frame 120 (including the first handle frame 121 and the second handle frame 122) will be further described one by one below.

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

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, as shown in FIGS. 1 to 3 , 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 install a front wheel 612 so that the stroller 1000 can be movable, wherein the front wheel 612 can be a universal wheel or a non-universal wheel. Of course, in another alternative embodiment, the front wheel frame 111 may also have other implementations, for example, the front wheel frame 111 only includes two front rods 1111, one end of the two front rods 1111 is connected to form a V-shaped structure, and a front wheel seat 611 can be centrally installed at the bottom of the front wheel frame 111. Alternatively, for example, the front wheel frame 111 only includes two front rods 1111 arranged in parallel along the left-right direction, and the two front wheel seats 611 are respectively connected to the two front rods 1111.

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

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

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

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 around the fourth pivot point A4 relative to the rear wheel frame 112. Specifically, the upper ends of the two rear rods 1121 are pivotally connected to the upper ends of the front rods 1111 on the same side through the first pivot seat 130, for example, which is equivalent to that 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 corresponding to the first pivot seat 130. In this way, the volume of the wheel frame 110 can be changed so that the frame body 100 can switch between the unfolded state and the folded state. More specifically, as shown in Figures 4 and 5, the first pivot seat 130 includes a first seat body 131 and a second seat body 132, and the first seat body 131 and the second seat body 132 are stacked and coaxially pivoted around the fourth pivot point A4. The connecting portion of the first base body 131 is connected to the front rod 1111 , and the connecting portion of the second base body 132 is connected to the rear rod 1121 .

Referring to FIGS. 3 to 5 , in one embodiment, the rider frame 120 can be pivotally connected to the wheel frame 110 through the first pivot seat 130, and can rotate around the fourth pivot point A4. Specifically, the first pivot seat 130 further includes a third seat body 133. The third seat body 133 is stacked with the second seat body 132 and the first seat body 131, and the three can coaxially pivot around the fourth pivot point A4. Specifically, the connecting portion of the third seat body 133 is connected to the rider frame 120. More specifically, the rider frame 120 can include, for example, a first push handle frame 121 and a second push handle frame 122 pivotally connected to each other. The end of the second handle frame 122 away from the first handle frame 121 is connected to the third seat 133 of the first pivot seat 130, which is equivalent to the second 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 switch between the unfolded state and the folded state. More specifically, the first handle frame 121 is, for example, a U-shaped structure, which includes two first support rods 1212 and a push handle rod 1213 connected between the two first support rods 1212. The push handle rod 1213 extends along the second direction F2 and is used for the user to hold to push the baby stroller 1000. More specifically, the second push handle frame 122 includes, for example, two second supporting rods 1221, the upper ends of the two second supporting rods 1221 are, for example, respectively pivotally connected to the first supporting rod 1212 on the same side, and the lower ends of the two second supporting rods 1221 are, for example, respectively connected to the third seat body 133 of the first pivot seat 130 on the same side.

Referring to FIGS. 1 to 3 , in one embodiment, the handlebar frame 120 may further include a second pivot seat 123, and the second pivot seat 123 may have a fifth pivot point A5. The first push handle frame 121 and the second push handle frame 122 are pivoted at the fifth pivot point A5 through the second pivot seat 123, which is equivalent to the first support rod 1212 on the same side and the second support rod 1221 on the same side being pivoted through the second pivot seat 123, and the first support rod 1212 may rotate around the fifth pivot point A5 relative to the second support rod 1221. Specifically, as shown in FIG. 6 , the second pivot seat 123 may include a fixed seat body 1231 and a pivot seat body 1232. The fixed seat body 1231 and the pivot seat body 1232 can pivot coaxially around the fifth pivot point A5. One of the fixed seat body 1231 and the pivot seat body 1232 is connected to the first push handle frame 121, and the other is connected to the second push handle frame 122. Specifically, in this embodiment, the connecting portion of the fixed seat body 1231 is connected to the second push handle frame 122, and the connecting portion of the pivot seat body 1232 is connected to the first push handle frame 121.

In order to prevent the first push handle frame 121 from rotating relative to the second push handle frame 122 at will, in one embodiment, as shown in FIG3 and FIG6 , the handle frame 120 further includes a locking mechanism 124 and a release mechanism 125. The locking mechanism 124 is disposed in the second pivot seat 123, and the locking mechanism 124 has a locking state that limits the relative rotation of the first push handle frame 121 and the second push handle frame 122, and a release state that allows the relative rotation of the first push handle frame 121 and the second push handle frame 122. The release mechanism 125 is disposed on the handle frame 120, such as the first push handle frame 121 or the second push handle frame 122, and the following will take the release mechanism 125 disposed on the first push handle frame 121 as an example to illustrate its working principle. Specifically, the release mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between a locking state and a release state, which is equivalent to allowing or restricting the first handle frame 121 and the second handle frame 122 to rotate relative to each other.

Specifically, in this embodiment, when the frame body 100 is in the unfolded state, the first handle frame 121 is substantially parallel to the second handle frame 122, that is, the first handle frame 121 and the second handle frame 122 are in the same plane, and the angle α3 between the first handle frame 121 and the second handle frame 122 is 180 degrees (see FIG. 3 ). The locking mechanism 124 can limit the relative rotation of the first handle frame 121 and the second handle frame 122 to keep the first handle frame 121 and the second handle frame 122 in the same plane. When the frame body 100 is in the folded state, the angle α3 between the first handle frame 121 and the second handle frame 122 is a sharp angle (see FIG. 19 ) or approaches 0 degrees. Of course, in another alternative embodiment, when the frame body 100 is in the unfolded state, the angle α3 between the first handle frame 121 and the second handle frame 122 can also be a blunt angle or a sharp angle.

6 , in one embodiment, the locking mechanism 124 includes a locking member 1241 and a locking recess 1242. The locking member 1241 is movably disposed in one of the fixed seat body 1231 and the pivot seat body 1232, and the locking recess 1242 is formed in the other of the pivot seat body 1232 and the fixed seat body 1231. Specifically, in this embodiment, the locking member 1241 is movably disposed in the pivot seat body 1232, and the locking recess 1242 is formed on the fixed seat body 1231. When the locking mechanism 124 is in a locked state, the locking member 1241 is inserted in the locking recess 1242 to limit the pivot seat body 1232 from rotating relative to the fixed seat body 1231. When the locking mechanism 124 is in the unlocked state, the locking member 1241 withdraws from the locking recess 1242 to allow the pivot body 1232 to move relative to the fixed body 1231.

Referring to FIGS. 8 to 12 , in one embodiment, the release mechanism 125 includes a driving wheel 1251, a traction member 1252, and a first operating member 1253. The driving wheel 1251 is rotatably disposed on the first handle frame 121. The traction member 1252 is connected between the driving wheel 1251 and the locking member 1241. The first operating member 1253 is movably disposed on the first handle frame 121 and connected to the driving wheel 1251. Specifically, the first operating member 1253 has a first locking position and a first release position. When the first operating member 1253 moves from the first locking position to the first unlocking position, the first operating member 1253 drives the driving wheel 1251 to rotate, and the driving wheel 1251 drives the traction member 1252 to move and drives the locking mechanism 124 to switch from the locking state to the unlocking state; in other words, the rotation of the driving wheel 1251 drives the traction member 1252 to move, and then drives the locking member 1241 to retreat 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 is connected to the locking member 1241.

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, it is connected to the first handle frame 121 through the second mounting seat 1257 described below.

Referring to Fig. 9 to Fig. 12, in this embodiment, the handle bar 1213 of the first handle frame 121 has a cavity 1214 inside, that is, the handle bar 1213 can be regarded as a hollow tube. The rod wall of the handle bar 1213 is provided with a mounting port communicated with 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 shown in Fig. 12, the driving wheel 1251 is provided with a first connecting portion 12511, and the first connecting portion 12511 and the first rotating shaft 1258 are misaligned, and the first operating member 1253 has a second connecting portion 12531, and the first connecting portion 12511 and the second connecting portion 12531 are matched with each other in a concave-convex manner for connection. For example, the first connection portion 12511 may be a connection column, and the second connection portion 12531 may be a collar, which is sleeved outside the connection column to movably connect the first operating member 1253 to the driving wheel 1251. When the first operating member 1253 is pushed, the first operating member 1253 drives the driving wheel 1251 to rotate around the first rotating shaft 1258.

Referring to Fig. 9, Fig. 10 and Fig. 12, in 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 chamber 12561. Specifically, the first mounting seat 1256 is mounted at the mounting opening of the push handle rod 1213, and the first mounting seat 1256 has a third opening 12564 that penetrates the top wall of the receiving chamber 12561, and the receiving chamber 12561 can be connected to the cavity 1214 of the push handle rod 1213 through the third opening 12564 and the mounting opening. Further, the first mounting seat 1256 also has a first opening 12562 that penetrates the bottom wall of the receiving chamber 12561. The first operating member 1253 is accommodated in the accommodating 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 with the first connecting portion 12511 of the driving wheel 1251. When the first operating member 1253 is located at the first locking position, at least a portion of the first operating member 1253 extends out of the accommodating cavity 12561 through the first opening 12562 (see FIGS. 8 and 9). In this way, the user can control the driving wheel 1251 to rotate by pushing the portion of the first operating member 1253 protruding from the accommodating cavity 12561, thereby achieving unlocking.

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.

Referring to FIGS. 8 to 12 , in one embodiment, the locking mechanism 124 further includes a second operating member 1254. The second operating member 1254 is pivoted to the rider frame 120 and has a locking portion 12542 and an operable operating portion 12541. The second operating member 1254 is pivotable between a second locking position and a second unlocking position. When the second operating member 1254 is located at the second locking position, the locking portion 12542 is located on the moving path of the first operating member 1253 to restrict the movement of the first operating member 1253. When the second operating member 1254 is located at the first unlocking position, the locking portion 12542 deviates from the moving path of the first operating member 1253 to allow the first operating member 1253 to move. In this way, the user can be prevented from accidentally touching the first operating member 1253, thereby preventing the frame body 100 from being folded.

Specifically, in this embodiment, as shown in Figures 9 and 10, the first mounting seat 1256 also 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 pivoted on the first mounting seat 1256 via the second rotating shaft 1260 (see FIG. 12 ), and the pivot point is located between the locking portion 12542 and the operating portion 12541 , so that the second operating member 1254 roughly presents a "seesaw" structure when pivoting on the first mounting seat 1256 (see FIGS. 9 and 10 ). When the operating portion 12541 is pressed, the locking portion 12542 rises and deviates from the moving path of the first operating member 1253 .

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

Referring to FIGS. 3 and 4 , and FIGS. 13 and 14 , in 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 being pivoted to each other and forming a first pivot point A1 (or a first pivot axis), and the seat portion 210 being pivoted to the frame body 100 and forming a second pivot point A2 (or a second pivot axis). Specifically, the seat portion 210 may be pivoted to the first pivot seat 130 on the frame body 100 and form a second pivot axis A2, and the second pivot axis A2 may be collinear or parallel to a fourth pivot axis A4. More specifically, in this embodiment, the second pivot axis A2 is collinear with the fourth pivot axis A4. When the backrest 220 and the seat 210 are arranged at an angle for a child to sit on, the seat 210 is configured to support the child's lower body (buttocks), and the backrest 220 is configured to support the child's upper body (back). More specifically, the seat 210 includes a seat tube 211 and a seat plate 212, the seat tube 211 is pivoted on the frame body 100 to form a second pivot point A2, and the seat plate 212 is mounted on the seat tube 211 to support the child's buttocks.

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

In this embodiment, the flexible cloth cover sleeved 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 supporting 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.

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

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

Referring to FIG. 13 and FIG. 14 , in one embodiment, the driving assembly 310 includes a driving member 311 and a rotating member 312. The driving member 311 is pivoted between the rider frame 120 and the rear wheel frame 112. One end of the rotating member 312 is pivoted to the front wheel frame 111, and the other end is pivoted to the driving member 311 at a first pivot point B1 (or a first pivot axis). When the frame body 100 is in the unfolded state, the first pivot point B1 and the transmission member 313 of the driving assembly 310 are both located between the front wheel frame 111 and the rear wheel frame 112. Thus, when the driving member 311 pivots relative to the rear wheel frame 112, the first pivot point B1 is displaced in the first direction F1 and drives 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 first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted to the driving member 311. Thus, when the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 simultaneously drives the linkage member 320 to move relative to the wheel frame 110 to pull or push the seat portion 210, so that the first pivot point A1 of the seat portion 210 can rotate around the second pivot point A2. Specifically, the linkage 320 and the seat portion 210 are pivotally connected at the third pivot point A3 (or the third pivot axis), and the third pivot point A3 is located on the side of the second pivot point A2 close to the first pivot point A1. In this way, when the driving member 311 rotates counterclockwise around the second pivot point B2, the linkage 320 can move upward along the first direction F1 relative to the wheel frame 110 as a whole (that is, the third pivot point A3 can be displaced upward along the first direction F1), so that the third pivot point A3 can rotate upward along the first rotation direction W around the second pivot point A2 (that is, the seat portion 210 can rotate clockwise around the second pivot point A2), thereby realizing the folding of the seat portion 210. More specifically, in this embodiment, the third pivot point A3 is coaxially arranged with the first pivot point A1. In this way, the lever arm can be increased, so that the seat portion 210 and the backrest portion 220 are more easily bent and folded (the specific bending process can be seen below).

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

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

Referring to Fig. 1 and Fig. 13, in this embodiment, the driving member 311 is pivoted between the first handle frame 121 and the rear wheel frame 112. Specifically, the first handle frame 121 has a push portion 1211 at the end close to the second handle frame 122. The driving member 311 is pivoted between the push portion 1211 and the rear wheel frame 112, and a fourth pivot point B4 (or a fourth pivot axis) is formed on the push portion 1211. In this way, the fourth pivot point B4, the second pivot point B2, the fourth pivot point A4 and the fifth pivot point A5 are connected to form a four-bar structure. Through this four-bar structure, the frame body 100 can be switched between an unfolded state and a folded state. At the same time, when the frame body 100 switches between the unfolded state and the folded state, the seat assembly 200 can be unfolded and folded through the driving member 311, the transmission member 313, the linkage member 320 and other components.

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

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

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

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

FIG. 13 to FIG. 19 show the folding process of the frame body 100 when the transmission member 313 is arranged on the driving member 311. In particular, the frame body 100 in FIG. 13 and FIG. 14 is in an unfolded state; the frame body 100 in FIG. 15 and FIG. 16 is in a first transition state between the unfolded state and the folded state; the frame body 100 in FIG. 17 and FIG. 18 is in a second transition state between the unfolded state and the folded state; and the frame body 100 in FIG. 19 is in a folded state. Thus, when the frame body 100 in this embodiment needs to be folded, the second operating member 1254 and the first operating member 1253 are first operated (e.g., pressed) to put the locking mechanism 124 in a released state. Then, the first handle frame 121 is rotated 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 driving member 311 downward, so that the driving member 311 rotates downward around the second pivot point B2 along the first rotation direction W, which is equivalent to rotating the driving member 311 around the second pivot point B2 in the counterclockwise direction. When the driving member 311 rotates around the second rotating point B2, the driving member 311 will drive the first rotating point B1 and one end of the rotating member 312 pivotally connected to the driving member 311 to move upward approximately along the first direction F1, so that the rotating member 312 rotates in a clockwise direction relative to the third rotating point B3, thereby changing the distance between the second rotating point B2 and the third rotating point B3, thereby causing the front wheel frame 111 to pivot relative to the rear wheel frame 112. In addition, the driving member 311 will also drive the transmission member 313 to rotate around the second pivot point B2 in the counterclockwise direction, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upward approximately along the first direction F1, and such movement will push the first pivot point A1 to rotate around the second pivot point A2 in the clockwise direction, 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 leans against the rear wheel frame 112 until the frame body 100 is folded to the folded state of FIG. 19 . As the second handle frame 122 gradually approaches the rear wheel frame 112, the backrest portion 220 is driven by the second handle frame 122 and the flexible cloth cover connected thereto to rotate counterclockwise relative to the first pivot point A1, thereby folding the backrest portion 220. It can be seen that during the folding process of the frame body 100, with the cooperation of the driving member 311, the transmission member 313, and the linkage member 320, the backrest portion 220 and the seat portion 210 can be bent downward around the first pivot point A1 respectively, so as to complete the folding of the seat assembly 200 and the backrest portion 220.

Referring to FIG. 14 and FIG. 16 , in one embodiment, the driving member 311 includes a first driving section 3111 and a second driving section 3112 connected to each other. The first driving section 3111 is pivoted with the rider frame 120, specifically, the first driving section 3111 is pivoted with the push portion 1211 of the first push handle frame 121 (see FIG. 13 ); the second driving section 3112 is pivoted with the rear wheel frame 112 at the second pivot point B2, and the second driving section 3112 is pivoted with the rotating member 312 at the first pivot point B1. The transmission member 313 is connected with the second driving section 3112 and is arranged at an angle with the second driving section 3112. Specifically, the first driving section 3111 and the second driving section 3112 are arranged at an angle, and a first angle α1 is formed therebetween. At least when the frame body 100 is in the unfolded state, the opening of the first angle α1 between the first driving section 3111 and the second driving section 3112 is arranged upward along the first direction F1. Specifically, the first angle α1 between the first driving section 3111 and the second driving section 3112 is a blunt angle. When the frame body 100 is in the unfolded state, the opening of the first angle α1 is arranged obliquely upward along the first direction F1. In this way, when the second driving segment 3112 moves upward (i.e., when the second driving segment 3112 rotates counterclockwise around the second rotating point B2), it can more easily drive the first rotating point B1 to move upward, and quickly realize the front wheel frame 111 to be close to the rear wheel frame 112. Of course, in another alternative embodiment, the first angle α1 between the first driving segment 3111 and the second driving segment 3112 can be a right angle or a sharp angle, which can be specifically set according to actual needs. It should be noted that the first driving segment 3111 and the second driving segment 3112 can be fixedly connected (such as integrally formed) or detachably connected (such as threaded connection, clamping). This application does not impose specific restrictions on this.

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

Referring to FIG. 16 and FIG. 18 , in some embodiments, the transmission member 313 includes a first segment 3131 and a second segment 3132 connected to each other, and a second angle α2 is formed between the first segment 3131 and the second segment 3132. The first segment 3131 is stacked on the driving member 311 and located between the first pivot point B1 and the second pivot point B2, the second segment 3132 is pivoted with the linkage 320, and at least when the frame body 100 is in the unfolded state, the opening of the second angle α2 is arranged downward along the first direction F1. Specifically, the first segment 3131 and the second driving segment 3112 are stacked and fixedly connected, and the opening of the second angle α2 is away from the opening of the first angle α1. More specifically, the linkage 320 is pivotally connected to an end of the second section 3132 away from the first section 3131. Thus, when the transmission member 313 rotates around the second rotation point B2 together with the driving member 311, the linkage 320 can be more easily driven to move upward or downward substantially along the first direction F1, so as to drive the seat assembly 200 to fold in the correct direction and avoid the "stuck" phenomenon.

Considering the frame body 100, the seat assembly 200 and the folding mechanism 300, the use principle of the stroller 1000 will be described in detail below with reference to FIGS. 13 to 19.

Referring to FIG. 13 and FIG. 14 , when the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state (see FIG. 6 ), the first push handle frame 121 and the second push handle frame 122 remain relatively fixed, that is, the push portion 1211 also remains relatively fixed. Since the second push handle frame 122, the push portion 1211, the driving member 311 and the rear wheel frame 112 form a four-bar structure, when the first push handle frame 121 and the second push handle frame 122 are locked, the fourth pivot point B4 and the second pivot point B2 remain fixed and cannot pivot, so that 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, and finally the frame body 100 can be stably maintained in the unfolded state. At the same time, since the driving member 311 is fixed, the transmission member 313 and the linkage member 320 are fixed, so that the seat portion 210 can be stably supported on the first pivot seat 130. In addition, when the frame body 100 is in the unfolded state, the front wheel frame 111 and the rear wheel frame 112 are arranged at an angle, and the rotating member 312 and the second driving section 3112 are approximately in the same horizontal plane. 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 triangle structure as a whole. In this way, the front wheel frame 111 and the rear wheel frame 112 can be kept relatively fixed, so that the frame body 100 can be stably maintained in the unfolded state.

Referring to FIGS. 13 to 19 , when the user needs to switch the frame body 100 from the unfolded state (see FIGS. 13 and 14 ) to the folded state (see FIGS. 18 and 19 ), the user presses the release mechanism 125 to switch the locking mechanism 124 to the release state. Specifically, the user first presses the operating portion 12541 of the second operating member 1254 to make the locking portion 12542 deviate from the moving path of the first operating member 1253, and then pushes the driving wheel 1251 to rotate by pressing the first operating member 1253, so that the traction member 1252 can be driven to move and the locking member 1241 can be pulled away from the locking recess 1242. Then, 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 rotating point B2. At this time, the first driving section 3111 of the driving member 311 rotates downward around the second rotating point B2, and the second driving section 3112 of the driving member 311 rotates upward around the second rotating point B2. As the second driving section 3112 rotates, the first rotating point B1 connected thereto moves upward. When the first pivot point B1 moves upward, it drives the rotating member 312 to move upward, so that the rotating member 312 pivots clockwise around the third pivot point B3. In this way, the distance between the second pivot point B2 and the third pivot point B3 is reduced, so that the front wheel frame 111 and the rear wheel frame 112 are closer to each other, thereby realizing the folding of the frame body 100. In addition, during the rotation process, the second driving section 3112 will also drive the transmission member 313 to rotate counterclockwise relative to the second rotation point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upward approximately along the first direction F1. This movement will push the first pivot point A1 to rotate clockwise around the second pivot point A2, thereby driving the seat portion 210 to fold. Since the second handle frame 122 rotates counterclockwise around the first pivot seat 130 to approach the rear wheel frame 122 during the folding process of the handle frame 120, and the backrest portion 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122 drives the backrest portion 220 to rotate counterclockwise around the first pivot point A1 during the process of approaching the rear wheel frame 122, thereby achieving the folding of the backrest portion 220.

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

According to the above description, in the stroller 1000 of the present application, 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 driving assembly 310 in the folding mechanism 300 is pivotally connected between the handlebar frame 120 and the wheel frame 110, and the linkage 320 is pivotally connected to the driving assembly 310 and the seat portion 210 respectively; in addition, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 can pivot relative to the wheel frame 110 or the handlebar frame 120 and drive the first pivot point A1 of the seat portion 210 to rotate upward around the second pivot point A2 through the linkage 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 only needs to be pivoted relative to the wheel frame 110. Under the coordinated action of the driving assembly 310 and the linkage 320, the first pivot point A1 of the seat portion 210 will rotate upward around the second pivot point A2, that is, the first pivot point A1 moves away from the ground. In addition, under the action of the second handle frame and the flexible cloth cover, the backrest portion 220 will rotate counterclockwise around the first pivot point A1 to move closer to the ground. In other words, 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 under the driving and linkage action of the folding mechanism 300. 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. At the same time, since the driving assembly 310 in the present application includes a transmission member 313, the transmission member 313 is arranged between the first rotation point B1 and the second rotation point B2 on the driving member 311, and is located on the side of the driving member 311 away from the angle α1. Therefore, when the linkage 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 320 and changes the force direction at the pivot point A6 of the linkage 320 and the transmission member 313 when the driving member 311 rotates, thereby increasing the rotation arm and making the rotation process of the seat portion 210 around the second pivot point A2 smoother. In addition, the protruding transmission member 313 also increases the radius of the linkage member 320 when rotating relative to the second rotation point B2, so that the distance that the linkage member 320 moves upward substantially along the first direction F1 increases, thereby ensuring that the seat assembly 200 can be completely folded, and improving the reliability of the folding of the seat assembly 200. Further, 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 substantially along the first direction F1, the mutually pivoted manner can provide a degree of 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 rotating.

Alternatively, in some alternative embodiments, the first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted to the rotating member 312. Specifically, the transmission member 313 is arranged at an angle to the rotating member 312, and is located on the side of the rotating member 312 away from the seat assembly 200. When the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 drives the first rotating point B1 to move in the first direction F1, and drives the rotating member 312 to rotate relative to the front wheel frame 111. Therefore, when the second end of the linkage member 320 is pivoted to the rotating member 312, the linkage member 320 can still push the seat portion 210 to rotate around the second pivot axis A2. Furthermore, the transmission member 313 is disposed on the rotating member 312, the first end of the linkage member 320 is pivoted to the seat portion 210, and the second end is pivoted to the transmission member 313, that is, the second end of the linkage member 320 is pivoted to the rotating member 312 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 pivot point B1 and the third pivot point B3.

When the frame body 100 switches from the unfolded state to the folded state, that is, when the first handle frame 121 is bent relative to the second handle frame 122 to fold the handle frame 120, the driving member 311 will rotate counterclockwise around the second rotation point B2 under the driving of the push portion 1211. During this rotation process, the first rotation point B1 moves upward along the first direction F1, so that the rotating member 312 rotates clockwise around the third rotation point B3, and then the transmission member 313 also rotates clockwise around the third rotation point B3. In this way, the linkage member 320 will move upward along the first direction F1 relative to the frame body 100 as a whole. Therefore, the first pivot point A1 of the seat portion 210 rotates upward around the second pivot point A2 along the first rotation direction W, which is equivalent to rotating the seat portion 210 around the second pivot point A2 in a clockwise direction to achieve folding of the seat portion 210. When the frame body 100 switches from the folded state to the unfolded state, that is, when the first handle frame 121 is bent relative to the second handle frame 122 to unfold the handle frame 120, the driving member 311 will rotate clockwise around the second rotation point B2 under the driving of the push portion 1211. During this rotation process, the first rotation point B1 moves downward along the first direction F1, so that the rotating member 312 rotates counterclockwise around the third rotation point B3, and then the transmission member 313 also rotates counterclockwise around the third rotation point B3. In this way, the linkage member 320 will move downward along the first direction F1 relative to the frame body 100 as a whole. Therefore, the first pivot point A1 of the seat portion 210 rotates downward around the second pivot point A2 along the first rotation direction W, which is equivalent to rotating the seat portion 210 around the second pivot point A2 in the counterclockwise direction to realize the unfolding of the seat portion 210. It can be seen that when the transmission member 313 is disposed on the rotating member 312, the seat assembly 200 can also be folded or unfolded along with the frame body 100. It should be noted that the folding and unfolding process of the backrest 220 in this embodiment is substantially the same as the folding and unfolding process of the backrest 220 when the transmission member 313 is disposed on the driving member 311, and will not be elaborated herein.

In the aforementioned stroller 1000, since the wheel frame 110 and the handlebar 120 in the frame body 100 are pivotally connected to each other, the frame body 100 has two states, namely, 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 and the frame body 100 (for example, the first pivot seat 130) are pivotally connected to form a second pivot point A2, the drive assembly 310 in the folding mechanism 300 is pivotally connected between the handlebar 120 and the wheel frame 110, and the folding mechanism 300 is configured to be movable. The linkage 320 in the structure 300 is pivotally connected to the driving assembly 310 and the seat portion 210 respectively; in addition, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 can pivot relative to the wheel frame 110 or the rider frame 120 and drive the first pivot point A1 of the seat portion 210 to rotate upward around the second pivot point A2 through the linkage 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the rider frame 120 only needs to be pivoted relative to the wheel frame 100. Under the cooperative action of the driving assembly 310 and the linkage 320, the first pivot point A1 of the seat portion 210 will rotate upward around the second pivot point A2, that is, the first pivot point A1 moves away from the ground to achieve folding of the seat portion 210. When the frame body 100 is folded, the handlebar frame 120 gradually moves closer to the ground, and the backrest portion 220 is connected to the handlebar frame 120 via the flexible cloth cover. Therefore, during the folding process of the frame body 100, the backrest portion 220 moves downward around the first pivot point A1 under the joint action of the flexible cloth cover, which is equivalent to moving the end of the backrest portion 220 away from the first pivot point A1 toward the ground. In this way, the backrest portion 220 can be folded. It can be seen that during the folding process of the frame body 100, the backrest portion 220 and the seat portion 210 will bend downward around the first pivot point A1, so that the loose flexible cloth cover at the first pivot point A1 is not easy to contact the ground, thereby reducing the possibility of wear of the flexible cloth cover. In addition, since the seat portion 210 is located at the outermost side (for example, the front end) along the front-rear direction of the stroller 1000 after the seat assembly 200 is folded (see FIG. 19), the seat portion 210 is located at the outermost side (for example, the front end) along the front-rear direction of the stroller 1000, so that although the seat portion 210 has a larger size, the possibility of interference between the seat portion 210 and other structures (such as the handlebar 120) during the unfolding and folding process of the seat assembly 200 can be avoided, thereby improving the smoothness of the overall folding of the stroller 1000. In addition, when the seat portion 210 is located at the outermost side, the flexible cloth cover accumulated at the joint between the seat portion 210 and the backrest portion 220 can be prevented from being offset against other structures. In this way, the volume of the stroller 1000 of the present application after folding can be made smaller.

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

In the stroller according to the present application, since the wheel frame and the handlebar in the frame body are pivotally connected to each other, the frame body has two states, namely, an unfolded state and a folded state, and can be switched between the two states. Furthermore, since the seat portion and the backrest portion in the seat assembly are pivotally connected to each other to form a first pivot point, and the seat portion is pivotally connected to the frame body to form a second pivot point, the drive assembly in the folding mechanism is pivotally connected between the handlebar and the wheel frame, and the linkage is pivotally connected to the drive assembly and the seat portion respectively; in addition, when the frame body is switched from the unfolded state to the folded state, the drive assembly can pivot relative to the wheel frame or the handlebar and drive the first pivot point of the seat portion to rotate upward around the second pivot point through the linkage. Therefore, when the stroller is placed on the ground and needs to be folded, it is only necessary to pivot the rider frame relative to the wheel frame. Under the synergy of the drive assembly and the linkage, the first pivot point of the seat will rotate upward around the second pivot point, that is, the first pivot point will move away from the ground to achieve folding of the seat; in addition, during this process, the end of the backrest away from the first pivot point will move closer to the ground. In other words, when the seat portion pivots around the second pivot point, the backrest portion and the seat portion will respectively bend downward around the first pivot point. In this way, the loose flexible cloth cover at the first pivot point is less likely to come into contact with the ground, thereby reducing the possibility of wear and tear.

FIG. 21 and FIG. 22 show a baby stroller 1000 provided according to another embodiment of the present application, and the structure of the baby stroller 1000 is substantially bilaterally symmetrical. The baby 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 handlebar 120, and the handlebar 120 and the wheel frame 110 are pivotally connected to each other so that the frame body 100 can switch between an extended state (see FIG. 21 and FIG. 22) and a folded state (see FIG. 32 and FIG. 33). The basket bar assembly 500 is pivotally connected to the wheel frame 110 and has an extended state (see FIG. 21 and FIG. 22) and a folded state (see FIG. 32 and FIG. 33).

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

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

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

21 to 23 , in one embodiment, the frame body 100 may include a wheel frame 110 and a rider frame 120. The wheel frame 110 includes a front wheel frame 111 and a rear wheel frame 112 that are pivotally connected. The rider frame 120 includes a first handle frame 121 and a second handle frame 122 that are pivotally connected.

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

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

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

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

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

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, the specific structure and connection method of the first pivot seat 130 and the second pivot seat 123 can be found in the above description and will not be repeated here.

Referring to FIG. 26, FIG. 28 and FIG. 30, in one embodiment, the first handle frame 121 has a push portion 1211 at the end near the second handle frame 122, and the driving assembly 310 is pivoted between the push portion 1211 and the rear wheel frame 112, and a fourth pivot point B4 is formed on the push portion 1211. The fourth pivot point B4, the second pivot point B2, the fourth pivot point A4 and the fifth pivot point A5 are connected to form a four-bar structure. In this way, the frame body 100 can be switched between the unfolded state and the folded state through the four-bar structure. It should be noted that the rods of the "four-bar structure" mainly include the second handle frame 122, the push portion 1211, the first driving section 3111 of the driving assembly 310 and a part of the frame of the rear wheel frame 112.

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

34 and 35 , in one embodiment, the locking mechanism 124 includes a locking member 1241 and a locking recess 1242. The locking member 1241 is movably disposed in the pivot seat body 1232, and the locking recess 1242 is formed on the fixed seat body 1231. When the locking mechanism 124 is in a locked state, the locking member 1241 is inserted into the locking recess 1242 to limit the pivot seat body 1232 from rotating relative to the fixed seat body 1231. When the locking mechanism 124 is in an unlocked state, the locking member 1241 withdraws from the locking recess 1242 to allow the pivot seat body 1232 to rotate relative to the fixed seat body 1231.

Continuing to refer to FIG. 34 and FIG. 35 , the 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 the locked and unlocked states, so as to limit or allow the relative rotation of the first handle frame 121 and the second handle frame 122. Specifically, the release mechanism 125 includes a release operating member 12510, a release rope 12520, and an elastic reset member 12530. Among them, one end of the release rope 12520 is connected to the release operating member 12510, and the other end is connected to the locking member 1241. In this way, when the unlocking operating member 12510 is pressed, the locking member 1241 can be pulled by the release rope 12520 to move away from the locking recess 1242. The elastic reset member 12530 abuts against the abutting locking member 1241 and is used to drive the locking member 1241 to reset so that the locking member 1241 remains in the locked state. Specifically, in this embodiment, the unlocking mechanism 125 is arranged 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 in 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 another alternative embodiment, the release operating member 12510 can also be disposed on the first support rod 1212 or the second support rod 1221, which is not specifically limited here.

FIG. 26 to FIG. 32 show the folding process of the frame body 100. The stroller 100 in FIG. 26 and FIG. 27 is in the unfolded state; the stroller 100 in FIG. 28 and FIG. 29 is in the first transition state between the unfolded state and the folded state; the stroller 100 in FIG. 30 and FIG. 31 is in the second transition state between the unfolded state and the folded state; and the stroller 100 in FIG. 32 is in the folded state. When the stroller 1000 or the frame body 100 in this embodiment needs to be folded, the release mechanism 125 is operated (e.g., pressed) to put the locking mechanism 124 in the unlocked state. Then, the first handle frame 121 is rotated around the second pivot seat 123 (i.e., around the fifth pivot point A5) and folded relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the driving assembly 310 downward, so that the driving assembly 310 rotates around the second pivot point B2 in the clockwise direction W2, thereby driving the linkage component 330 to move relative to the rear wheel frame and rotate relative to the driving assembly 310, thereby driving the basket rod assembly 500 to fold. In addition, while the first handle frame 121 rotates relative to the second handle frame 122 so that the push portion 1211 pushes the drive assembly 310 downward, 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 folded state of Figures 32 and 33.

Referring to FIG. 23 and FIG. 25 , in one embodiment, the basket assembly 500 can be used to support or install a basket (not shown in the figure), so that the user can place some of the personal items in the basket to reduce the burden of carrying. Specifically, the basket assembly 500 can include a front tube 510 and a rear tube 520 that are connected. The front tube 510 is connected to the front wheel frame 111 at the seventh joint (or the seventh pivot axis) A7, and is connected to the rear tube 520 at the fifth pivot point (or the fifth pivot axis) B5. The rear tube 520 is connected to the rear wheel frame 112 at the eighth joint (or the eighth pivot axis) A8. In this way, the basket rod assembly 500 can be folded by the front tube 510 rotating around the seventh pivot point A7, the rear tube 520 rotating around the eighth pivot point A8, and the front tube 510 rotating around the fifth pivot point B5 relative to the rear tube 520, so that it can switch between the extended state and the folded state. Among them, 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 kept parallel.

Specifically, in this embodiment, as shown in FIG. 23 and FIG. 25 , the front tube body 510 includes two front baskets 513 spaced apart and arranged side by side, and the first ends of the two front baskets 513 are respectively pivoted with 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 baskets 521 located on the left and right sides and a connecting rod 522 connected between the two rear baskets 521 (see FIG. 35 ). The two rear baskets 521 are respectively pivoted with the rear rod 1121 on the same side of the rear wheel frame 112 at the eighth pivot point A8, and are respectively pivoted with the second ends of the front baskets 513 on the same side at the fifth pivot point B5. The left and right sides of the vegetable basket rod assembly 500 are respectively connected to the left and right sides of the frame body 100, so that the stability of the vegetable basket rod assembly 500 in supporting the vegetable basket can be improved.

In order to facilitate the rotation of the rear tube 520 relative to the front tube 510 (i.e., to facilitate the bending of the basket assembly 500), and to improve the smoothness of the basket assembly 500 switching from the unfolded state to the folded state, in one embodiment, as shown in FIG25, 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, which is equivalent to each front basket bar 513 being an L-shaped structure. Among them, one end of the first tube section 511 far from the second tube section 512 is pivoted with the front wheel frame 111 at the seventh pivot point A7, and one end of the second tube section 512 far from the first tube section 511 is pivoted with the rear tube body 520 at the fifth pivot point B5. The opening of the angle α4 between the first tube section 511 and the second tube section 512 is set downward along the first direction F1. In this way, the hinge dead point at the fifth pivot point B5 can be avoided, and the reliability of the bending of the front tube body 510 and the rear tube body 520 is improved. It should be noted that the first direction F1 refers to the vertical direction, and in this embodiment, it refers to the height direction of the frame body 100 when the frame body 100 is in the unfolded state.

Referring to FIG. 26 and FIG. 27 , when the basket assembly 500 is in the extended state, the angle α5 between the first tube section 511 and the rear tube body 520 is substantially 180 degrees (see FIG. 27 ). Referring to FIG. 32 and FIG. 33 , when the basket assembly 500 is in the folded state, the angle α5 between the first tube section 511 and the rear tube body 520 is a sharp angle or substantially 0 degrees (see FIG. 32 ). It should be noted that when the basket assembly 500 is in the folded state, the angle α5 between the first tube section 511 and the rear tube body 520 can be a sharp angle or substantially 0 degrees, which can be determined according to actual circumstances. In this embodiment, as shown in Figures 27, 29, 31 and 33, 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 a sharp angle.

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

Referring to FIGS. 26 to 29 , in one example, the driving assembly 310 in the folding mechanism 300 is pivoted between the rear wheel frame 112 and the rider frame 120, and the linking member 330 is pivoted with the driving assembly 310 and the rear tube 520, respectively, for driving the rear tube 520 to rotate around the eighth pivot point A8, and making the rear tube 520 rotate around the fifth pivot point B5 relative to the front tube 510, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111. In one example, the driving assembly 310 is a rod-shaped structure and has a first driving segment 3111 and a second driving segment 3112. The first driving segment 3111 and the second driving segment 3112 have a first end and a second end, respectively. The first end of the first driving segment 3111 and the first end of the second driving segment 311 are far away from each other, and the second end of the first driving segment 3111 and the second end of the second driving segment 311 are connected together.

The first end of the first driving section 3111 is pivoted with the first push handle frame 121 of the rider frame 120, the first end of the second driving section 3112 is pivoted with the connecting member 330, and the second pivot point B2 is located between the first driving section 3111 and the second driving section 3112, specifically, at a position where the second end of the first driving section 3111 and the second end of the second driving section 3112 are connected. In other words, the second end of the first driving section 3111 and the second end of the second driving section 3112 are both connected to the second pivot point B2. Compared with the first end of the first driving section 3111, the second pivot point B2 is closer to the first end of the second driving section 3112 of the driving assembly 310. In this way, when the frame body 100 is in the unfolded state (see Figures 26 and 27), the second driving section 3112 of the driving assembly 310 can be regarded as being located between the front wheel frame 111 and the rear wheel frame 112, 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 around the second pivot point B2, the driving assembly 310 will drive the connecting component 330 to move as a whole around the pivot point B2 relative to the rear wheel frame 112 and cause the connecting component 330 to pivot relative to the driving assembly 310, so as to drive the fifth pivot point B5 of the rear tube 520 and the front tube 510 to move as a whole (for example, move in a direction close to the first pivot seat 130), thereby causing the rear tube 520 to rotate around the eighth pivot point A8 and the front tube 510 to rotate around the seventh pivot point A7, thereby changing the distance between the eighth pivot point A8 and the seventh pivot point A7, and causing the rear wheel frame 112 to pivot relative to the front wheel frame 111. It can be understood that the second turning point B2 is closer to the first end of the second driving segment 3112 of the driving element 310 than to the first end of the first driving segment 3111, so that the length of the first driving segment 3111 is greater than the length of the second driving segment 3112. When operating the driving element 310 to fold the frame body 100, the lever arm is longer and more labor-saving.

Continuing to refer to FIGS. 26 to 29 , the driving assembly 310 is pivoted between the rider frame 120 and the rear wheel frame 112 (specifically, the rear rod 1121), and a second pivot point (or second pivot axis) B2 is formed on the rear wheel frame 112 (rear rod 1121). The second pivot axis B2 is parallel to the eighth pivot axis A8. The linking component 330 is pivoted to the driving assembly 310 and the rear tube 520 (specifically, the rear basket 521), respectively, and the pivot point C2 of the linking component 330 and the rear tube 520 (rear basket 521) is located between the fifth pivot point B5 and the eighth pivot point A8, and the pivot point C2 is closer to the fifth pivot point B5.

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

Referring again to FIGS. 26 to 29 , in one embodiment, the first driving segment 3111 and the second driving segment 3112 of the driving assembly 310 are arranged at an angle, and an opening of the first angle α1 between the first driving segment 3111 and the second driving segment 3112 is arranged upward along the first direction F1.

Specifically, the first angle α1 between the first driving section 3111 and the second driving section 3112 is a blunt angle. When the frame body 100 is in the unfolded state, the opening of the first angle α1 is disposed obliquely upward along the first direction F1. Of course, in another alternative embodiment, the first angle α1 between the first driving section 3111 and the second driving section 3112 can be a right angle or a sharp angle, which can be specifically set according to actual needs. When the handlebar frame 120 is folded, that is, the first handle frame 121 is folded by rotating around the second pivot seat 123 relative to the second handle frame 122, the push portion 1211 will push the first driving section 3111 of the driving assembly 310 to rotate downward around the second pivot point B2, and the second driving section 3112 will rotate upward around the second pivot 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 linking component 330 to move upward, so that the pivot point C2 and the fifth pivot point B5 can also move upward more easily. In other words, the first driving section 3111 and the second driving section 3112 are arranged at an angle, and the opening of the first angle α1 therebetween is arranged upward, so as to facilitate the folding of the basket rod assembly 500 (specifically, between the front tube body 510 and the rear tube body 520). When the frame body 100 is folded, the driving 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 fold, so that the rear tube body 520 is closer to the rear wheel frame 112, thereby avoiding interference with the seat assembly 200 mentioned below during folding, thereby affecting the reliability of the folding of the entire frame body 100.

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

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

21 and 23, in one embodiment, the stroller 1000 further includes a seat assembly 200. The seat assembly 200 can be directly used as a cushion, and the child can directly sit on the seat assembly 200. Of course, in another alternative embodiment, the seat assembly 200 can be used as a support member for supporting a carrier, and the child is supported on the seat assembly 200 by the carrier. Continuing to refer to FIGS. 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 FIGS. 21 and 22). The seat assembly 200 is pivotally connected to the first pivot seat 130 and the drive assembly 310, wherein the seat assembly 200 is pivotally connected to the first pivot seat 130 at a second pivot point (or second pivot axis) A2, and the seat assembly 200 is pivotally connected to the drive assembly 310 at a seventh pivot point (or seventh pivot axis) B7. The seventh pivot point B7 is located on a side of the second pivot point B2 away from the linkage component 330. In this way, when the frame body 100 switches from the unfolded state to the folded state, the driving assembly 310 rotates and drives the seat assembly 200 to rotate relative to the first pivot seat 130. At the same time, the driving assembly 310 drives the connecting component 330 to rotate, thereby driving the vegetable basket rod assembly 500 to fold, thereby achieving synchronous folding of the seat assembly 200 and the vegetable basket rod assembly 500 (see Figures 29 and 31).

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

Referring to FIGS. 22 and 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 pivoted between the first pivot seat 130 and the drive assembly 310. The seat plate 212 is mounted on the seat tube assembly 230 for supporting a vehicle or directly supporting a child. Specifically, the seat plate 212 can be detachably mounted on the seat tube assembly 230, for example, by means of a snap connection, a screw connection, etc. Of course, in another alternative embodiment, the seat plate 212 is fixedly mounted on the seat tube assembly 230. Continuing to refer to FIG. 23 , the support rod 240 is disposed on the seat tube assembly 230 and is located on a side of the seat plate 212 facing the basket rod assembly 500. Of course, in some other embodiments not shown, the seat assembly 200 may not be provided with the support rod 240, and this application does not limit this.

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

The working principle of the folding mechanism 300 is described below with reference to FIGS. 26 to 31 .

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

Referring to FIGS. 26 to 31 , when the user needs to switch the frame body 100 from the unfolded state (see FIGS. 26 and 27 ) to the folded state (see FIGS. 30 and 31 ), the user presses the release mechanism 125 to switch the locking mechanism 124 to the unlocked state. Subsequently, the first handle frame 121 is rotated in the counterclockwise direction W1 around the second pivot seat 123 (or around the fifth pivot point A5) to be folded relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the drive assembly 310 downward, so that the drive assembly 310 rotates in the clockwise direction W2 around the second pivot point B2. At this time, the first driving section 3111 of the driving assembly 310 rotates downward around the second pivot point B2, and the second driving section 3112 of the driving assembly 310 rotates upward around the second pivot point B2. The linking component 330 connected to the first driving section 3111 moves upward as a whole, and the pivot point C1 between the linking component 330 and the rear tube 520 also moves upward, so that the rear tube 520 rotates around the eighth pivot point A1. 8 is pivoted in the clockwise direction W2, thereby causing the fifth pivot point B5 of the rear tube body 520 and the front tube body 510 to move upward, thereby driving the front tube body 510 to rotate in the counterclockwise direction W1 around the seventh pivot point A7, thereby causing the basket rod assembly 500 to switch from the extended state to the folded state, and the distance between the seventh pivot point A7 and the eighth pivot point A8 is reduced, and finally the front wheel frame 111 and the rear wheel frame 112 are brought closer to each other, so that the frame body 100 can be folded. During this process, one end of the connecting component 330 will rotate around the pivot point C1 in the counterclockwise direction W1 relative to the driving assembly 310, and the other end of the connecting component 330 will rotate around the pivot point C2 in the counterclockwise direction W1 relative to the rear tube 520 to adjust the angle and distance between the driving assembly 310 and the rear tube 520, thereby providing freedom of movement for the relative movement between the driving assembly 310 and the rear tube 520, thereby allowing the rear tube 520 to rotate when the driving assembly 310 rotates. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot seat 130 respectively, when the driving assembly 310 rotates in the clockwise direction W2 around the second pivot point B2, the seat assembly 200 is driven to rotate in the clockwise direction W2 relative to the first pivot seat 130, thereby achieving synchronous folding of the seat assembly 200 and the basket assembly 500.

Of course, when the user needs to switch the frame body 100 from the folded state to the unfolded state, there is no need to press the release mechanism 125, and the first handle frame 121 can be rotated around the second pivot seat 123 (or around the fifth pivot point A5) in the counterclockwise direction W1 to unfold relative to the second handle frame 122. During the rotation process, the push portion 1211 of the first handle frame 121 pushes the drive assembly 310 upward, so that the drive assembly 310 rotates around the second pivot point B2 in the counterclockwise direction W1. At this time, the second driving section 3112 of the driving assembly 310 rotates downward around the second rotating point B2, thereby pushing the connecting component 330 to move downward as a whole, and further pushing the joint point C2 between the connecting component 330 and the rear tube 520 to move downward. As a result, the rear tube body 520 rotates around the eighth pivot point A8 in the counterclockwise direction W1, and the fifth pivot point B5 of the front tube body 510 and the rear tube body 520 moves downward, thereby driving the front tube body 510 to rotate in the clockwise direction W2, thereby causing the front tube body 510 and the rear tube body 520 to stretch relative to each other, increasing the distance between the seventh pivot point A7 and the eighth pivot point A8, and finally pushing the front wheel frame 111 and the rear wheel frame 112 away from each other, so that the frame body 100 can be unfolded. During this process, one end of the linking component 330 pivots around the pivot point C1 in the clockwise direction W2, and the other end of the linking component 330 pivots around the pivot point C2 in the clockwise direction W2 to adjust the angle and distance between the driving assembly 310 and the rear tube 520, thereby allowing the rear tube 520 to pivot when the driving assembly 310 rotates. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot seat 130 respectively, when the driving assembly 310 rotates in the counterclockwise direction W1 around the second pivot 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 assembly 500.

Referring to FIGS. 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 and the seat plate 212 are spaced apart to form a through passage 250. The folding aid 600 is connected to the vegetable basket rod assembly 500 and passes through the through passage 250. During the folding process of the frame body 100, the folding aid 600 is operated to drive the vegetable basket rod assembly 500 to switch from an extended state to a folded state. When the frame body 100 is in the unfolded state, the folding aid 600 is located below the seat plate 212, so that the folding aid 600 is prevented from being exposed and affecting the aesthetics of the stroller. In addition, the folding auxiliary member 600 is supported on the support rod 240. When not in use, it is folded and placed on the support rod 240 to prevent it from falling to the ground and from interfering with the rear wheel 622 when pushing the stroller 1000.

In this embodiment, as shown in FIG. 25 , FIG. 26 , FIG. 36 and FIG. 37 , the folding webbing is connected to the rear tube 520, and the connection point of the two is located between the eighth pivot point A8 and the fifth rotation point B5. In this way, when folding the frame body 100, the user can pull the folding webbing upward along the first direction F1, and the folding webbing applies an upward force to the end of the rear tube 520 close to the front tube 510, so that the rear tube 520 rotates around the eighth pivot point A8 in the clockwise direction W2, thereby driving the basket rod assembly 500 and the frame body 100 to fold quickly, that is, improving the smoothness of the folding of the frame body 100. More specifically, the folding webbing is connected to the pivot point C2 between the connector and the rear tube 520.

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

As can be seen from the above description, in the stroller 1000 of the present application, the wheel frame 110 and the handle frame 120 can be folded, and the wheel frame 110 as a whole can be folded relative to the handle frame 120, so that the frame body 100 can be freely switched between the unfolded state and the folded state. Since the basket assembly 500 is pivoted on the wheel frame 110 and has an extended state and a folded state, the driving assembly 310 is pivoted between the handlebar frame 120 and the wheel frame 110 and is movably connected to the basket assembly 500 via the connecting member 330. Therefore, when the stroller 1000 of the present application is folded, the driving assembly 310 can be moved/rotated relative to the frame body 100 as a whole by directly folding the frame body 100, and the connecting member 330 can be pivoted, thereby driving the basket assembly 500 to rotate and switching the basket assembly 500 from the extended state to the folded state. In this way, not only the convenience of folding the baby stroller 1000 can be improved, but also the smoothness of folding the baby stroller 1000 can be improved. At the same time, since the seat assembly 200 in the present application is pivotally connected between the wheel frame 110 and the driving 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 driving assembly 310 and the connecting component 330 (specifically, the driving assembly 310 is pivotally connected between the rear wheel frame 112 and the handlebar frame 120, and the connecting component 330 is pivotally connected to the driving assembly 310 Therefore, when the frame body 100 is folded, the driving assembly 310 drives the basket rod assembly 500 to bend and fold (the front tube 510 and the rear tube 520 are folded relative to each other), which makes the basket rod assembly 500 fold more smoothly and approach the rear wheel frame 112. At the same time, the driving assembly 310 can also drive the seat The assembly 200 is synchronously pivoted and folded so that the seat assembly 200 always remains roughly parallel to the rear tube 520. Even for a large-sized vegetable basket assembly 200, it can be smoothly and quickly folded. At the same time, the vegetable basket rod assembly 500 can be prevented from interfering with the seat assembly 200 during the folding process, ensuring the smoothness and reliability of the overall folding of the stroller 1000.

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

In the stroller according to the present application, since the wheel frame and the handle frame can be relatively folded so that the frame body has an unfolded state and a folded state, the vegetable basket rod assembly is pivoted on the wheel frame and has an extended state and a folded state, and the driving assembly is pivoted between the handle frame and the wheel frame and is movably connected to the vegetable basket rod assembly through a connecting component. Therefore, when the stroller is folded, the driving assembly drives the connecting component to pivot directly by folding the frame body, thereby driving the vegetable 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.

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

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

1000: stroller 100: frame body 110: wheel frame 111: front wheel frame 1111: front rod 1112: front cross bar 112: rear wheel frame 1121: rear rod 1122: rear cross bar 120: handle frame 121: first push handle frame 1211: push part 1212: first support rod 1213: push handle rod 1214: cavity 122: second push handle frame 1221: second support rod 123: second pivot seat 1231: fixed seat body 1232: pivot seat body 124: locking mechanism 1241: locking member 1242: locking recess 125: release mechanism 1251: driving wheel 12510: release operating member 12511: first connecting part 1252: traction member 12520: release rope 1253: first operating member 12530: elastic reset member 12531: second connecting part 1254: second operating member 12541: operating part 12542: locking part 1255: first reset member 1256: first mounting seat 12561: receiving chamber 12562: first opening 12563: second opening 12564: third opening 1257: second mounting seat 1258: first rotating shaft 1259: second reset member 1260: second rotating shaft 130: first pivot seat 131: first seat body 132: second seat body 133: third seat body 200: seat assembly 210: seat part 211: seat tube 212: seat plate 220: backrest part 230: seat tube assembly 231: first seat tube 232: second seat tube 240: support rod 250: through channel 300: folding mechanism 310: drive assembly 311: drive member 3111: first drive section 3112: second drive section 312: rotating member 313: transmission member 3131: First section 3132: Second section 3111: First drive section 3112: Second drive section 317: Stopper 320: Linkage 330: Linkage component 500: Basket assembly 510: Front tube 511: First tube section 512: Second tube section 513: Front basket 520: Rear tube 521: Rear basket 522: Connecting rod 600: Folding auxiliary part 611: Front wheel seat 612: Front wheel 621: Rear wheel seat 622: Rear wheel A1: First pivot point A2: Second pivot point A3: Third pivot point A4: Fourth pivot point A5: Fifth pivot point A6: Sixth pivot point A7: Seventh pivot point A8: Eighth pivot point B2: Second pivot point B1: First pivot point B2: Second pivot point B3: Third pivot point B4: Fourth pivot point B5: Fifth pivot point A2: Second pivot point B7: Seventh pivot point C1: Pivot point C2: Pivot point F1: First direction F2: Second direction U1-U1: Line U2-U2: Line U3-U3: Line U4-U4: Line U5-U5: Line U6-U6: Line

The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application.

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

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

FIG1 is a three-dimensional diagram of a baby stroller in an embodiment of the present application;

FIG2 is a three-dimensional view of the stroller shown in FIG1 from another perspective;

FIG3 is a three-dimensional diagram of the stroller shown in FIG1 from another perspective;

FIG4 is an enlarged view of point A in FIG3;

FIG5 is an enlarged view of point B in FIG3;

FIG6 is a cross-sectional view along the line U1-U1 in FIG3 , in which part of the structure of the seat portion is omitted;

FIG7 is an enlarged view of point C in FIG6;

FIG8 is a schematic diagram of a portion of the structure of the handlebar frame of the stroller shown in FIG3 ;

FIG9 is a cross-sectional view along the line U2-U2 in FIG8 , wherein the second operating member is in the second locking position and the first operating member is in the first locking position;

FIG10 is a cross-sectional view along the line U2-U2 in FIG8, wherein the second operating member is in the second unlocking position and the first operating member is in the first unlocking position;

FIG11 is a cross-sectional view along the line U3-U3 in FIG8 , with part of the structure of the driver's frame exploded;

FIG12 is an enlarged view of point D in FIG11;

FIG13 is a cross-sectional view along the line U4-U4 in FIG3 , wherein the frame body is in an unfolded state;

FIG14 is an enlarged view of point E in FIG13 ;

FIG15 is a cross-sectional view along the line U4-U4 in FIG3 , wherein the frame body is in a first transition state between the unfolded state and the folded state;

FIG16 is an enlarged view of point F in FIG15 ;

FIG17 is a cross-sectional view along the line U4-U4 in FIG3 , wherein the frame body is in a second transition state between the unfolded state and the folded state;

FIG18 is an enlarged view of point G in FIG17;

FIG19 is a side view of the stroller shown in FIG1 with the frame body in a folded state;

FIG20 is a three-dimensional view of the stroller shown in FIG1 when the frame body is in a folded state;

FIG21 is a perspective view of a stroller according to another embodiment of the present application;

FIG22 is a three-dimensional view of the stroller shown in FIG21 from another perspective;

FIG23 is a three-dimensional view of the stroller shown in FIG21 with the seat plate omitted;

FIG24 is an enlarged view of point H in FIG23;

FIG25 is an enlarged view of point I in FIG23;

FIG26 is a cross-sectional view along the line U5-U5 in FIG21 , wherein the stroller is in an unfolded state;

FIG27 is an enlarged view of point J in FIG26;

FIG28 is a cross-sectional view along the line U5-U5 in FIG21 , wherein the stroller is in a first transition state between the unfolded state and the folded state;

FIG29 is an enlarged view of point K in FIG28;

FIG30 is a cross-sectional view along the line U5-U5 in FIG21, wherein the stroller is in a second transition state between the unfolded state and the folded state;

FIG31 is an enlarged view of L in FIG30;

FIG32 is a side view of the stroller shown in FIG21 in a folded state;

FIG33 is a three-dimensional view of the stroller shown in FIG21 in a folded state;

FIG34 is a cross-sectional view along the line U6-U6 in FIG21;

FIG35 is a three-dimensional view of the stroller shown in FIG34;

FIG36 is a three-dimensional view of the stroller shown in FIG21 with the seat plate omitted, and the stroller is provided with a folding auxiliary member at this time;

FIG37 is a cross-sectional view along the line U5-U5 in FIG21 , in which the stroller is in an unfolded state and is provided with a folding auxiliary member;

FIG. 38 is a three-dimensional view of the stroller shown in FIG. 21 in a folded state, where the stroller is provided with a folding auxiliary member.

1000: Stroller

100: Frame body

110: wheel frame

111:Front wheel frame

112:Rear wheel frame

120: Driver's stand

121: First push handle

1211: Pushing Department

1212: The first support pole

122: Second push handle

1221: The second support pole

123: Second cardinal transposition

130: First cardinal transposition

200: Seat assembly

210: Seat

220: Backrest

300: folding mechanism

310:Drive assembly

311:Driver

3111: First drive section

320: Linkage

611:Front wheel seat

612:Front wheel

622:Rear wheel

A5: Fifth pivot point

B4: The fourth turning point

F1: First direction

Claims (20)

A stroller for children, comprising: a frame body, comprising 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 be switched between an unfolded state and a folded state; a seat assembly, comprising a seat portion and a backrest portion, the seat portion and the backrest portion being pivotally connected to each other to form a first pivot point, and the seat portion being pivotally connected to the frame body to form a second pivot point; and a folding mechanism, comprising a drive assembly and a linkage, the drive assembly being pivotally connected between the handle frame and the wheel frame, and the linkage being 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 part to rotate upward along the first direction around the second pivot point through the linkage, thereby driving the seat assembly to fold. According to the stroller described in 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 handlebar frame and the rear wheel frame, one end of the rotating member is pivotally connected to the front wheel frame, and the other end is pivotally connected to the driving member at a first rotating point, the first end of the linkage member is pivotally connected to the seat portion, and the second end is pivotally connected to the driving member or the rotating member; When the frame body is in the unfolded state, the first pivot point is located between the front wheel frame and the rear wheel frame; and when the frame body switches from the unfolded state to the folded state, the driving member pivots relative to the rear wheel frame or the rider frame and drives the linkage member to move upward along the first direction, so that the first pivot point of the seat part rotates upward along the first direction around the second pivot point. According to the stroller described in claim 2, the driving assembly further includes a transmission member, the transmission member is arranged on the driving member or the rotating member, and the second end of the linkage member is pivotally connected to the transmission member; when the frame body is in the unfolded state, the transmission member is located between the front wheel frame and the rear wheel frame. The stroller according to claim 3, wherein 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 away from the seat assembly. According to the stroller of claim 1, the driving assembly includes a driving member and a transmission member, the driving member is pivoted between the handlebar frame and the wheel frame, the transmission member is arranged on the driving member, the second end of the linkage member is pivoted with the transmission member, and the first end of the linkage member is pivoted with 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 portion rotates upward along the first direction around the second pivot point. The stroller according to claim 3 or 5, wherein: the transmission member is arranged on the drive member; the drive member includes a first drive section and a second drive section connected to each other, the first drive section is pivoted with the handlebar frame, the second drive section is pivoted with the rear wheel frame of the wheel frame at a second pivot point, the second drive section is pivoted with the rotating member at a first pivot point, and the transmission member is arranged on the second drive section; optionally, the transmission member is integrally formed on the drive member. The stroller according to claim 6, wherein a first angle is formed between the first driving section and the second driving section, and at least when the frame body is in the unfolded state, the opening of the first angle is arranged upward along the first direction; at least a part of the transmission member is located on the side of the second driving section away from the opening of the first angle; and/or the transmission member includes a first segment body and a second segment body connected to each other, and a second angle is formed between the first segment body and the second segment body, the first segment body is stacked on the driving member and is located between the first pivot point and the second pivot point, the second segment body is pivoted with the linkage member, and at least when the frame body is in the unfolded state, the opening of the second angle is arranged downward along the first direction. A stroller according to claim 7, wherein the linkage is pivotally connected to an end of the second section away from the first section. A stroller according to any one of claims 1 to 5, wherein 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 pivoted to the wheel frame and is pivoted to the first handle frame at the fifth pivot point via the second pivot seat, and the drive assembly is pivoted between the first handle frame and the wheel frame. The stroller according to claim 9, wherein the handle frame further comprises: 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 relative rotation of the first handle frame and the second handle frame; 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. According to claim 10, the stroller, the second pivot seat includes a fixed seat body and a pivot seat body, the fixed seat body and the pivot seat body can pivot around the fifth pivot point, one of the fixed seat body and the pivot seat body is connected to the first handle frame, and the other is connected to the second handle frame; the locking mechanism includes a locking piece and a locking recess, the locking piece is movably disposed 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 locking state, the locking member is inserted into the locking recess, and when the locking mechanism is in the unlocking state, the locking member retracts from the locking recess; Optionally, the unlocking mechanism includes: A driving wheel rotatably disposed on the first handle frame; A traction member connected between the driving wheel and the locking member; and A first operating member movably disposed on the first handle frame and connected to the driving wheel, The first operating member has a first locking position and a first releasing position. When the first operating member moves from the first locking position to the first releasing 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 releasing state through the traction member; Further optionally, the releasing mechanism also 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 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 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. According to the stroller of claim 9, the drive assembly and the wheel frame are pivoted at a second pivot point; the first handle frame has a push portion at the end close to the second handle frame, the drive assembly is pivoted between the push portion and the wheel frame, and a fourth pivot point is formed on the push portion, the fourth pivot point, the second pivot point, the fourth pivot point and the fifth pivot point are connected to form a four-bar structure, and the frame body is switched between the unfolded state and the folded state through the four-bar structure. A stroller for children, comprising: a frame body, including a wheel frame and a handle frame, wherein the handle frame and the wheel frame are pivotally connected to each other so that the frame body can switch between an extended state and a folded state; a basket assembly, pivotally connected to the wheel frame and having an extended state and a folded state; and a folding mechanism, comprising 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 assembly through the linkage component; when the frame body switches between the extended state and the folded state, the driving assembly pivots relative to the wheel frame or the handle frame and drives the basket assembly to switch between the extended state and the folded state through the linkage component. According to claim 13, the stroller, wherein: the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame; the basket assembly includes a front tube body and a rear tube body, the front tube body is pivotally connected to the front wheel frame at the seventh pivot point, and is pivotally connected to the rear tube body at the fifth pivot point, and the rear tube body is pivotally connected to the rear wheel frame at the eighth pivot point; the drive assembly is pivotally connected between the rear wheel frame and the handlebar frame, and is movably connected to the rear tube body through the connecting member; or, the drive assembly is pivotally connected between the front wheel frame and the handlebar frame, and is movably connected to the front tube body through the connecting member. A stroller according to claim 14, wherein the front tube body includes a first tube segment and a second tube segment arranged at an angle, an end of the first tube segment away from the second tube segment is pivoted to the front wheel frame at the seventh pivot point, an end of the second tube segment away from the first tube segment is pivoted to the rear tube body at the fifth pivot point, and an opening of the angle between the first tube segment and the second tube segment is arranged downward along the first direction. According to claim 14, the stroller, wherein, the driving assembly forms a second pivot point on the rear wheel frame, the linkage component is pivoted to the rear tube and the driving assembly respectively, when the driving assembly pivots around the second pivot point, the driving assembly drives the linkage component to move relative to the frame body as a whole and to rotate relative to the driving assembly, so as to allow the rear tube to rotate around the eighth pivot point, and the front tube to rotate around the seventh pivot point. According to claim 16, the driving assembly has a first driving section and a second driving section, the first driving section is pivoted to the handlebar, the second driving section is pivoted to the connecting member, and the second pivot point is located between the first driving section and the second driving section; Optionally, the first driving section and the second driving section are arranged at an angle, and the opening of the first angle between the first driving section and the second driving section is arranged upward along the first direction. According to claim 13, the driving assembly is provided with a stopper, and when the basket rod assembly is in the extended state, the stopper is used to abut against the linkage component to limit the linkage component from pivoting relative to the driving assembly, thereby keeping the basket rod assembly in the extended state; Optionally, the driving assembly is pivoted with the wheel frame at a second pivot point, and the stopper is provided at a second driving section of the driving assembly close to the linkage component, and is located on a side of the driving assembly close to the handlebar frame. The stroller according to claim 13, further comprising a folding assisting member connected to the vegetable basket rod assembly to allow the vegetable basket rod assembly to be driven to switch to the folded state by operating the folding assisting member. According to claim 13, the stroller further comprises: a first pivot seat, the wheel frame and the handlebar frame are coaxially pivoted at a fourth pivot point through the first pivot seat; and a seat assembly pivotally connected to the first pivot seat and the drive assembly respectively; when the frame body switches from the unfolded state to the folded state, the drive 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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