Stroller

Abstract

The present 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.

Description

STROLLERCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 2023115626977, filed on November, 21, 2023, Chinese patent application No. 202311279354X, filed on September 28, 2023, and Chinese patent application No. 2024113127339, filed on September 19, 2024, the contents of which are incorporated herein by reference in their entireties.TECHNICAL FIELD

[0002] The present application relates to the technical field of wheeled movable devices, and in particular, to a stroller.BACKGROUND

[0003] For families with infants or children, using a stroller as an auxiliary care tool when going out has become very common, which is very convenient. A stroller generally includes a frame and a seat. Most of the frames and the seats are foldable. When the stroller is not needed, the frame and seat can be folded to reduce its size, making it easier to store or carry.

[0004] Generally, the seat of a stroller includes a seat part, a backrest part, and a flexible cloth cover that covers the seat part and the backrest part. When the frame is folded, the seat part and the backrest part rotate along with the frame, thereby achieving synchronous folding of the seat. However, when the seat of a stroller commonly found on the market is folded along with the frame, the flexible cloth cover disposed at the pivotal joint between the seat part and the backrest part becomes loose. As a result, during the folding process, the loose portion of the cloth cover is easily in contact with the ground, which not only easily stains the cloth cover, but may also cause wear and tear on the cloth cover.

[0005] In addition, in order to meet the user's requirements for the practicality and convenience of the stroller, a folding mechanism is generally disposed on the stroller, and the user can switch the stroller between the unfolded state and the folded state by the folding mechanism. In addition, in order to facilitate the user to place the carry-on items and reduce the user's load, a vegetable basket with a storage space is usually disposed under the seat of the stroller. However, since the vegetable basket is located under the seat and is limited by the structure of the folding mechanism, it easilyleads to cumbersome operation of the stroller and unsmooth folding, which increases the difficulty of folding the stroller.SUMMARY

[0006] According to various embodiments of the present application, a stroller is provided.

[0007] According to an aspect of the present application, a stroller is provided, 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, where the seat part and the backrest part are pivotally connected to each other at a first pivot point, and the seat part is 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 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 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.

[0008] In an embodiment, the wheel frame includes a front wheel frame and a rear wheel frame that are pivotally connected to each other. The driving assembly includes a driving member and a rotating member. The driving member is pivotally connected between the handle frame and the rear wheel frame. An end of the rotating member is pivotally connected to the front wheel frame, and another end of the rotating member is pivotally connected to the driving member at a first rotation point. A first end of the linkage member is pivotally connected to the seat part, and a second end of the linkage member is pivotally connected to the driving member or the rotating member. When the frame body is in the unfolded state, the first rotation point is located between the front wheel frame and the rear wheel frame. When the frame body is switched from the unfolded state to the folded state, the driving member pivots relative to the rear wheel frame or the handle frame and drives the linkage member to move upwards in a first direction, so that the first pivot point of the seat part rotates upwards around the second pivot point in the first rotating direction.

[0009] In an embodiment, the driving assembly further includes a transmission member disposed on the driving member or the rotating member. The first end of the linkage member is pivotally connected to the seat part, and the second end of the linkage member is pivotally connected to thetransmission 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.

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

[0011] In an embodiment, the transmission member is disposed on a side of the driving member or the rotating member facing away from the seat assembly.

[0012] In an embodiment, the driving member is pivotally connected to the rear wheel frame at a second rotation point, and the rotating member is pivotally connected to the front wheel frame at a third rotation point. When the frame body is in the unfolded state, the first rotation point and the transmission member are located between the second rotation point and the third rotation point. 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, to drive the linkage member to move as a whole relative to the frame body, so that the first pivot point of the seat part rotates around the second pivot point in the first rotating direction.

[0013] In an embodiment, the driving assembly includes a driving member pivotally connected between the handle frame and the wheel frame; and a transmission member disposed on the driving member. A second end of the linkage member is pivotally connected to the transmission member, and a first end of the linkage member is pivotally connected to the seat part. When the frame body is switched 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 upwards in a first direction, so that the first pivot point of the seat part rotates upwards around the second pivot point in the first rotating direction.

[0014] In an embodiment, the transmission member is disposed on the driving member. The driving member includes: a first driving section pivotally connected to the handle frame; and a second driving section pivotally connected to the rear wheel frame of the wheel frame at a second rotation point. The second driving section is pivotally connected to the rotating member at a first rotation point. The transmission member is disposed on the second driving section.

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

[0016] In an embodiment, a first angle is formed between the first driving section and the second driving section. At least when the frame body is in the unfolded state, an opening of the first anglefaces upwards in a first direction; and at least a portion of the transmission member is located on a side of the second driving section away from the opening of the first angle.

[0017] In an embodiment, the transmission member includes a first segment and a second segment that are connected to each other. A second angle is formed between the first segment and the second segment. The first segment is stacked on the driving member and is located between the first rotation point and the second rotation point. The second segment is pivotally connected to the linkage member. At least when the frame body is in the unfolded state, an opening of the second angle faces downwards in the first direction.

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

[0019] In an embodiment, the linkage member is pivotally connected to the seat part at a third pivot point. The third pivot point IS located on a side of the second pivot point adjacent to the first pivot point.

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

[0021] In an embodiment, the frame body further includes a first pivot base. The wheel frame and the handle frame are coaxially pivotally connected at a fourth pivot point via the first pivot base. The seat part is pivotally connected to the first pivot base at the second pivot point. The second pivot point is coaxially with or offset from the fourth pivot point.

[0022] In an embodiment, the handle frame includes a first handle frame, a second handle frame and a second pivot base. The second pivot base has a fifth pivot point. The second handle frame is pivotally connected to the wheel frame and pivotally connected to the first handle frame at the fifth pivot point via the second pivot base. The driving assembly is pivotally connected between the first handle frame and the wheel frame.

[0023] In an embodiment, the handle frame further includes: a locking mechanism disposed in the second pivot base, the locking mechanism having a locked state in which relative rotation between the first handle frame and the second handle frame is restricted, and an unlocked state in which the relative rotation between the first handle frame and the second handle frame is allowed; and an unlocking mechanism disposed on the handle frame and operably connected to the locking mechanism to allow the locking mechanism to switch between the locked state and the unlocked state.

[0024] In an embodiment, the second pivot base includes a fixing base body and a pivot base body. The fixing base body and the pivot base body are capable of pivoting around the fifth pivotpoint. One of the fixing base body and the pivot base body is connected to the first handle frame, and another of the fixing base body and the pivot base body is connected to the second handle frame. The locking mechanism includes: a locking member movably disposed on one of the fixing base body and the pivot base body; and a locking recess formed on another of the pivot base body and the fixing base body. When the locking mechanism is in the locked state, the locking member is inserted into the locking recess, and when the locking mechanism is in the unlocked state, the locking member is withdrawn from the locking recess.

[0025] In an embodiment, the unlocking 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 has a first locked position and a first unlocked position. When the first operating member moves from the first locked position to the first unlocked position, the first operating member drives the driving wheel to rotate, and the driving wheel drives the locking mechanism to switch from the locked state to the unlocked state through the pulling member.

[0026] In an embodiment, the unlocking mechanism further includes: a second operating member pivotally connected to the handle frame and having a locking part and an operable operating part. The second operating member is pivotable between a second locked position and a second unlocked position. When the second operating member is in the second locked position, the locking part is located on a moving path of the first operating member to restrict the first operating member from moving. When the second operating member is in the first unlocked position, the locking part deviates from the moving path of the first operating member to allow the first operating member to move.

[0027] In an embodiment, the unlocking mechanism further includes a first reset member. The first reset member is configured to abut against the second operating member and bias the operating part to cause the second operating member to constantly pivot toward the second locked position.

[0028] In an embodiment, the unlocking mechanism further includes a first mounting base connected to the first handle frame and having a receiving cavity. The first mounting base has a first opening extending through a base wall of the receiving cavity and a second opening extending through a sidewall of the receiving cavity. The first operating member is received in the receiving cavity. At least when the first operating member is in the first locked position, at least a portion of the first operating member extends out of the receiving cavity via the first opening. The locking part of the second operating member is received in the receiving cavity, and at least when the secondoperating member is in the second locked position, at least a portion of the operating part extends out of the receiving cavity via the second opening.

[0029] In an embodiment, the unlocking mechanism further includes: a second mounting base connected to the first handle frame and at least partially received in the receiving cavity of the first mounting base, the driving wheel being rotatably mounted on the second mounting base; and a first reset member at least partially received in the receiving cavity. An end of the first reset member abuts against the operating part of the second operating member, and another end of the first reset member abuts against the second mounting base.

[0030] In an embodiment, the driving assembly and the wheel frame are pivotally connected to each other at a second rotation point. The first handle frame has a push part at an end adjacent to the second handle frame. The driving assembly is pivotally connected between the push part and the wheel frame, and pivotally connected to the push part at a fourth rotation point. The fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-link structure. The frame body is switchable between the unfolded state and the folded state through the four-link structure.

[0031] According to an aspect of the present application, a stroller is provided, 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 basket rod assembly pivotally connected to the wheel frame and having an unfolded state and a folded state; and a folding mechanism including a driving assembly and a linking component. The driving assembly is pivotally connected between the handle frame and the wheel frame, and is movably connected to the basket rod assembly through the linking component, when the frame body is switched between the unfolded state and the folded state, the driving assembly pivots relative to the wheel frame or the handle frame and drives the basket rod assembly to switch between the unfolded state and the folded state through the linking component.

[0032] In an embodiment, the linking component is pivotally connected to the basket rod assembly and the driving assembly respectively. When the driving assembly pivots relative to the wheel frame or the handle frame, the linking component pivots relative to the driving assembly to allow the basket rod assembly to switch between the unfolded state and the folded state.

[0033] In an 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 bodypivotally connected to the front wheel frame at a seventh pivot point and pivotally connected to the rear tube body at a fifth rotation point; and a rear tube body pivotally connected to the rear wheel frame at an eighth pivot point. The driving assembly is pivotally connected between the rear wheel frame and the handle frame, and is movably connected to the rear tube body through the linking component. Or, the driving assembly is pivotally connected between the front wheel frame and the handle frame, and is movably connected to the front tube body through the linking component.

[0034] In an embodiment, the front tube body includes a first tube section and a second tube section that are arranged at an angle to each other. An end of the first tube section away from the second tube section is pivotally connected to the front wheel frame at the seventh pivot point, an end of the second tube section away from the first tube section is pivotally connected to the rear tube body at the fifth rotation point. An opening of an angle between the first tube section and the second tube section faces downwards in a first direction.

[0035] In an embodiment, when the basket rod assembly is in the unfolded state, an angle between the first tube section 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 section and the rear tube body is an acute angle or substantially 0 degrees.

[0036] In an embodiment, the driving assembly is pivotally connected to the rear wheel frame at a second rotation point, and the linking component is pivotally connected to the rear tube body and the driving assembly respectively. When the driving assembly pivots around the second rotation point, the driving assembly drives the linking component to move as a whole relative to the frame body and rotate relative to the driving assembly, to allow the rear tube body to rotate around the eighth pivot point and allow the front tube body to rotate around the seventh pivot point.

[0037] In an embodiment, the driving assembly includes: a first driving section pivotally connected to the handle frame; and a second driving section pivotally connected to the linking component. The second rotation point is located between the first driving section and the second driving section.

[0038] In an embodiment, the first driving section and the second driving section are arranged at an angle to each other. An opening of an angle between the first driving section and the second driving section faces upwards in a first direction.

[0039] In an embodiment, the driving assembly is pivotally connected to the rear wheel frame and the handle frame, and is movably connected to the rear tube body through the linking component.A pivot point between the linking component and the rear tube body is located between the fifth rotation point and the eighth pivot point. Or, the driving assembly is pivotally connected to the front wheel frame and the handle frame, and is movably connected to the front tube body through the linking component. A pivot point between the linking component and the front tube body is located between the fifth rotation point and the seventh pivot point.

[0040] In an embodiment, the driving assembly is provided with a stopper. When the basket rod assembly is in the unfolded state, the stopper is configured to abut against the linking component to restrict the linking component from pivoting relative to the driving assembly, so that the basket rod assembly is maintained in the unfolded state.

[0041] In an embodiment, the driving assembly is pivotally connected to the wheel frame at a second rotation point. The stopper is disposed on a second driving section of the driving assembly adjacent to the linking component and is located at a side of the driving assembly adjacent to the handle frame.

[0042] In an embodiment, the stroller further includes an auxiliary folding member. The auxiliary folding member is connected to the basket rod assembly, and is configured to, when being operated, to drive the basket rod assembly to switch to the folded state.

[0043] In an embodiment, the wheel frame includes a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame. The basket rod assembly includes a front tube body and a rear tube body. The front tube body is pivotally connected to the front wheel frame at a seventh pivot point, and is pivotally connected to the rear tube body at a fifth rotation point. The rear tube body is pivotally connected to the rear wheel frame at an eighth pivot point. The auxiliary folding member is connected to the rear tube body; and a connection point between the auxiliary folding member and the rear tube body is located between the eighth pivot point and the fifth rotation point. Or, the auxiliary folding member is connected to the front tube body; and a connection point between the auxiliary folding member and the front tube body is located between the seventh pivot point and the fifth rotation point. Or, the auxiliary folding member is connected to the fifth rotation point.

[0044] In an embodiment, the stroller further includes: a first pivot base, the wheel frame and the handle frame being coaxially pivoted at a fourth pivot point via the first pivot base; and a seat assembly pivotally connected to the first pivot base and the driving assembly respectively. When the frame body is switched from the unfolded state to the folded state, the driving assembly drives the seat assembly to rotate relative to the first pivot base to avoid interference with a folding process ofthe basket rod assembly.

[0045] In an embodiment, during folding of the frame body, the seat assembly is parallel to at least a portion of the basket rod assembly.

[0046] In an embodiment, the driving assembly and the wheel frame are pivotally connected to each other at a second rotation point. The seat assembly and the first pivot base are pivotally connected to each other at a second pivot point. The seat assembly and the driving assembly are pivotally connected to each other at a seventh rotation point. The seventh rotation point is located on a side of the second rotation point away from the linking component.

[0047] In an embodiment, the seat assembly includes: a seat tube assembly pivotally connected between the first pivot base and the driving assembly; and a seat plate mounted on the seat tube assembly.

[0048] In an embodiment, the seat assembly further includes a support bar. The support bar is disposed on the seat tube assembly and located on a side of the seat plate facing the basket rod assembly. The support bar is spaced apart from the seat plate, and a through passage is formed between the support bar and the seat plate. The stroller further includes an auxiliary folding member. The auxiliary folding member is connected to the basket rod assembly and extends through the through passage. The auxiliary folding member is configured to, when being operated, to drive the basket rod assembly to switch to the folded state.

[0049] In an embodiment, the frame body further includes a first pivot base. The first pivot base has a fourth pivot point. The wheel frame and the handle frame are coaxially pivotally connected at the fourth pivot point via the first pivot base.

[0050] In an embodiment, the handle frame includes a first handle frame, a second handle frame and a second pivot base. The second pivot base has a fifth pivot point. The second handle frame is pivotally connected to the wheel frame and is pivotally connected to the first handle frame at the fifth pivot point via the second pivot base. A first driving section of the driving assembly is pivotally connected to the first handle frame.

[0051] In an embodiment, the stroller further includes: a locking mechanism disposed in the second pivot base, the locking mechanism having a locked state in which relative rotation between the first handle frame and the second handle frame is restricted, and an unlocked state in which the relative rotation between the first handle frame and the second handle frame is allowed; and an unlocking mechanism disposed on the first handle frame or the second handle frame. The unlockingmechanism is operably connected to the locking mechanism to allow the locking mechanism to switch between the locked state and the unlocked state.

[0052] In an embodiment, the driving assembly and the wheel frame are pivotally connected to each other at a second rotation point. The first handle frame has a push part at an end adjacent to the second handle frame. The driving assembly is pivotally connected between the push part and the wheel frame, and pivotally connected to the push part at a fourth rotation point. The fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-link structure. The frame body is switchable between the unfolded state and the folded state through the four-link structure.BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings constituting a part of the present application are used to provide further understanding of the present application. The illustrative embodiments of the present application and the descriptions thereof are used to illustrate the present application and do not constitute improper limitations on the present application.

[0054] In order to illustrate the embodiments of the present application more clearly, the drawings used in the embodiments will be described briefly. Apparently, the following described drawings are merely for the embodiments of the present application, and other drawings may be derived by those of ordinary skill in the art without any creative effort.

[0055] In addition, the drawings are not drawn to a one to one scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0056] FIG. 1 is a perspective view of a stroller according to an embodiment of the present application.

[0057] FIG. 2 is a perspective view of the stroller shown in FIG. 1 from another perspective.

[0058] FIG. 3 is a perspective view of the stroller shown in FIG. 1 from yet another perspective.

[0059] FIG. 4 is an enlarged view of portion A in FIG. 3.

[0060] FIG. 5 is an enlarged view of portion B in FIG. 3.

[0061] FIG. 6 is a sectional view taken along a line Ul-Ul in FIG. 3, with part of the seat part omitted.

[0062] FIG. 7 is an enlarged view of portion C in FIG. 6.

[0063] FIG. 8 is a partial schematic view of a handle frame of the stroller shown in FIG. 3.

[0064] FIG. 9 is a sectional view taken along a line U2-U2 in FIG. 8, with a second operating member in a second locked position and a first operating member in a first locked position.

[0065] FIG. 10 is a sectional view taken along a line U2-U2 in FIG. 8, with the second operating member in a second unlocked position and the first operating member in the first unlocked position.

[0066] FIG. 11 is a sectional view taken along a line U3-U3 in FIG. 8, with part of the handle frame exploded;

[0067] FIG. 12 is an enlarged view of portion D in FIG. 11.

[0068] FIG. 13 is a sectional view taken along a line U4-U4 in FIG. 3, with a frame body in an unfolded state.

[0069] FIG. 14 is an enlarged view of portion E in FIG. 13.

[0070] FIG. 15 is a sectional view taken along the line U4-U4 in FIG. 3, with the frame body in a first transition state between an unfolded state and a folded state.

[0071] FIG. 16 is an enlarged view of portion F in FIG. 15.

[0072] FIG. 17 is a sectional view taken along the line U4-U4 in FIG. 3, with the frame body in a second transition state between the unfolded state and the folded state.

[0073] FIG. 18 is an enlarged view of portion G in FIG. 17.

[0074] FIG. 19 is a side view of the stroller shown in FIG. 1 when the frame body is in a folded state.

[0075] FIG. 20 is a perspective view of the stroller shown in FIG. 1 when the frame body is in a folded state.

[0076] FIG. 21 is a perspective view of a stroller according to another embodiment of the present application.

[0077] FIG. 22 is a perspective view of the stroller shown in FIG. 21 from another perspective.

[0078] FIG. 23 is a perspective view of the stroller shown in FIG. 21 with a seat plate omitted.

[0079] FIG. 24 is an enlarged view of portion H in FIG. 23.

[0080] FIG. 25 is an enlarged view of portion I in FIG. 23.

[0081] FIG. 26 is a sectional view taken along a line U5-U5 in FIG. 21, with the stroller in an unfolded state.

[0082] FIG. 27 is an enlarged view of portion J in FIG. 26.

[0083] FIG. 28 is a sectional view taken along the line U5-U5 in FIG. 21, with the stroller in a first transition state between an unfolded state and a folded state.

[0084] FIG. 29 is an enlarged view of portion K in FIG. 28.

[0085] FIG. 30 is a sectional view taken along the line U5-U5 in FIG. 21, with the stroller in a second transition state between the unfolded state and the folded state.

[0086] FIG. 31 is an enlarged view of portion L in FIG. 30.

[0087] FIG. 32 is a side view of the stroller shown in FIG. 21 in a folded state.

[0088] FIG. 33 is a perspective view of the stroller shown in FIG. 21 in a folded state.

[0089] FIG. 34 is a sectional view taken along a line U6-U6 in FIG. 21.

[0090] FIG. 35 is a perspective view of the stroller shown in FIG. 34.

[0091] FIG. 36 is a perspective view of the stroller shown in FIG. 21, provided with an auxiliary folding member, with a seat plate omitted.

[0092] FIG. 37 is a sectional view taken along the line U5-U5 in FIG. 21, with the stroller in the unfolded state and provided with the auxiliary folding member.

[0093] FIG. 38 is a perspective view of the stroller shown in FIG. 21 in the folded state, with the stroller provided with the auxiliary folding member.DETAILED DESCRIPTION

[0094] In order to make the above-mentioned objects, features and advantages of the present application more apparent and easy to understand, the specific implementations of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0095] An embodiment of the present application provides a stroller 1000. The carrier may be detachably mounted on the stroller 1000. It should be noted that the stroller provided by the present application may be applied to different objects according to various types of the carriers. For example, when the carrier is a seat or a carrycot, the stroller is applicable for infants or children. When the carrier is a pet box, the stroller can also be applicable for pets and used as a pet stroller.

[0096] FIGS. 1 to 3 show a stroller 1000 according to an embodiment of the present application. The overall structure of the stroller 1000 is substantially bilaterally symmetrical in a left-right direction, and may include a frame body 100, a seat assembly 200, and a folding mechanism 300. Theframe body 100, the seat assembly 200, and the folding mechanism 300 will be described together with the description of the stroller 1000.

[0097] Referring to FIGS. 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 may be switched between an unfolded state (see FIGS. 1 and 2) and a folded state (see FIGS. 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 configurations 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 below one by one.

[0098] Continuing to refer to FIGS. 1 to 3, in an embodiment, the front wheel frame 111 is, for example, a U-shaped structure, which includes front rods 1111 located on the left and right sides and a front crossbar 1112 connected between the two front rods 1111. The front crossbar 1112 extends substantially in a second direction F2, which is a left-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.

[0099] In an embodiment, at least one front wheel seat 611 is mounted 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 mounted at the bottom of the front wheel frame 111. The two front wheel seats 611 are spaced apart from each other in the left-right direction (i.e., in the second direction F2). More specifically, the two front wheel seats 611 are mounted at the left and right ends of the front crossbar 1112. The two front rods 1111 are respectively connected to the front wheel seats 611 on the respective sides. Each front wheel seat 611 is configured to be connected to a front wheel 612, to enable the stroller 1000 to be movable. The front wheel 612 may be a universal wheel or a non-universal wheel. 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. First ends of the two front rods 1111 are connected to each other to form a V-shaped structure. One front wheel seat 611 may be centrally mounted at the bottom of the front wheel frame 111. Alternatively, for example, the front wheel frame 111 only includes two front rods 1111 disposed parallel to each other in the left-right direction, and the two front wheel seats 611 are respectively connected to the two front rods 1111.

[0100] It should be noted that, unless otherwise clearly specified and defined, the orientationalterms such as "left" and "right" of the stroller 1000 in various embodiments of the present application are based on the "left" and "right" orientations of the stroller 1000 in normal travel, and the "left" and "right" directions are schematically shown by arrows L and R in the figures. These orientational terms are only used to make the description of the embodiments of the present application clearer and are not used to improperly limit the protection scope of the present application.

[0101] Referring again to FIGS. 1 to 3, the rear wheel frame 112 is in, 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. The rear cross bar 1122 extends in the second direction F2. At least one rear wheel seat 621 is mounted at the bottom of the rear wheel frame 112. Specifically, in this embodiment, two rear wheel seats 621 are mounted at the bottom of the rear wheel frame 112. The two rear wheel seats 621 are spaced apart from each other in the left-right direction (i.e., in the second direction F2). More specifically, the two rear wheel seats 621 are mounted 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 respective sides. Each rear wheel seat 621 is configured to be connected to a rear wheel 622. The rear wheel 622 may also be a universal wheel or a non-universal wheel, for example. In this embodiment, the size of the rear wheel 622 is larger than the size of the front wheel 612, so that the overall structure of the stroller 1000 is more stable. 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.

[0102] Optionally, in another alternative embodiment, the rear wheel frame 112 may have other implementations, for example, the rear wheel frame 112 only includes two rear rods 1121. First ends of the two rear rods 1121 are connected to each other to form a V-shaped structure. One rear wheel seat 621 may be centrally mounted at the bottom of the rear wheel frame 112. Alternatively, for example, the rear wheel frame 112 only includes two rear rods 1121 disposed parallel to each other in the left-right direction, and the two rear wheel seats 621 are respectively connected to the two rear rods 1121.

[0103] Referring to FIGS. 3 to 5, in an embodiment, the frame body 100 further includes a first pivot base 130. Specifically, the first pivot base 130 has a fourth pivot point A4 or a fourth pivot axis A4. The front wheel frame 111 and the rear wheel frame 112 are pivotally connected to the fourth pivot point A4 via the first pivot base 130, or can pivot around the fourth pivot axis A4 via the first pivot base 130, so that the front wheel frame 111 can rotate relative to the rear wheel frame 112 aroundthe fourth pivot point A4. Specifically, each of the upper ends of the two rear rods 1121 is pivotally connected to the corresponding upper end of the front rod 1111 on the same side, for example, through the first pivot base 130. That is, each rear rod 1121 on one side is rotatable relative to the corresponding front rod 1111 on the one side around the fourth pivot point A4 of the corresponding first pivot base 130. In this way, the volume of the wheel frame 110 may be changed, so that the frame body 100 may be switched between the unfolded state and the folded state. More specifically, as shown in FIGS. 4 and 5, the first pivot base 130 includes a first base body 131 and a second base body 132. The first base body 131 and the second base body 132 overlap each other, and coaxially pivots around the fourth pivot point A4. A connecting part of the first base body 131 is connected to the front rod 1111, and a connecting part of the second base body 132 is connected to the rear rod 1121.

[0104] Referring to FIGS. 3 to 5, in an embodiment, the handle frame 120 may be pivotally connected to the wheel frame 110 by the first pivot base 130, and can rotate around the fourth pivot point A4. Specifically, the first pivot base 130 further includes a third base body 133. The third base body 133 overlaps the second base body 132 and the first base body 131. The third base body 133, the second base body 132 and the first base body 131 can coaxially pivot around the fourth pivot point A4. Specifically, a connecting part of the third base body 133 is connected to the handle frame 120. More specifically, the handle frame 120 can include, for example, a first handle frame 121 and a second handle frame 122 that are pivotally connected to each other. An end of the second handle frame 122 away from the first handle frame 121 is connected to the third base body 133 of the first pivot base 130, that is, the second handle frame 122, the front wheel frame 111 and the rear wheel frame 112 are coaxially pivotally connected to one another at the fourth pivot point A4. In this way, the folding of the frame body 100 may be achieved by pivoting, so that the frame body 100 is switchable between the unfolded state and the folded state. More specifically, the first handle frame 121 is, for example, a U-shaped structure, which includes two first support rods 1212 and a handle rod 1213 connected between the two first support rods 1212. The handle rod 1213 extends in the second direction F2 and is configured for the user to hold to push the stroller 1000. More specifically, the second handle frame 122 includes, for example, two second support rods 1221. Upper ends of the two second support rods 1221 are, for example, respectively pivotally connected to the first support rods 1212 on the respective sides, and lower ends of the two second support rods 1221 are, for example, respectively connected to the third base bodies 133 of the first pivot bases 130 on therespective sides.

[0105] Referring to FIGS. 1 to 3, in an embodiment, the handle frame 120 may further include, for example, a second pivot base 123. The second pivot base 123 has a fifth pivot point A5. The first handle frame 121 and the second handle frame 122 are pivotally connected to the fifth pivot point A5 by the second pivot base 123. That is, the first support rod 1212 on one side is pivotally connected to the second support rod 1221 on the one side by the corresponding second pivot base 123, and the first support rod 1212 is rotatable relative to the second support rod 1221 around the fifth pivot point A5. Specifically, as shown in FIG. 6, the second pivot base 123 may include, for example, a fixing base body 1231 and a pivot base body 1232. The fixing base body 1231 and the pivot base body 1232 can coaxially pivot around the fifth pivot point A5. One of the fixing base body 1231 and the pivot base body 1232 is connected to the first handle frame 121, and another of the fixing base body 1231 and the pivot base body 1232 is connected to the second handle frame 122. Specifically, in this embodiment, a connecting part of the fixing base body 1231 is connected to the second handle frame 122, and a connecting part of the pivot base body 1232 is connected to the first handle frame 121.

[0106] In order to restrict arbitrary rotation of the first handle frame 121 relative to the second handle frame 122, in an embodiment, as shown in FIGS. 3 and 6, the handle frame 120 further includes a locking mechanism 124 and an unlocking mechanism 125. The locking mechanism 124 is disposed in the second pivot base 123. The locking mechanism 124 has a locked state in which the relative rotation between the first handle frame 121 and the second handle frame 122 is restricted, and an unlocked state in which the first handle frame 121 and the second handle frame 122 are allowed to rotate relative to each other. The unlocking mechanism 125 is disposed on the handle frame 120, for example, the first handle frame 121 or the second handle frame 122. The working principle of the unlocking mechanism 125 will be described below by taking the unlocking mechanism 125 disposed on the first handle frame 121 as an example. Specifically, the unlocking mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locked state and the unlocked state, that is, allow or restrict the relative rotation between the first handle frame 121 and the second handle frame 122.

[0107] 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 coplanar. An angle a3 formed between the first handle frame 121 and the second handle frame 122 is 180 degrees (see FIG. 3). The locking mechanism 124can restrict the relative rotation between 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 a3 formed between the first handle frame 121 and the second handle frame 122 is an acute angle (see FIG. 19) or tends to 0 degrees. In another alternative embodiment, when the frame body 100 is in the unfolded state, the angle a3 formed between the first handle frame 121 and the second handle frame 122 can also be an obtuse angle or an acute angle.

[0108] Referring to FIG. 6, in an embodiment, the locking mechanism 124 includes a locking member 1241 and a locking recess 1242. The locking member 1241 is movably disposed on one of the fixing base body 1231 and the pivot base body 1232, and the locking recess 1242 is formed on another of the pivot base body 1232 and the fixing base body 1231. Specifically, in this embodiment, the locking member 1241 is movably disposed in the pivot base body 1232, and the locking recess 1242 is formed on the fixing base body 1231. When the locking mechanism 124 is in the locked state, the locking member 1241 is inserted in the locking recess 1242 to restrict the pivot base body 1232 from rotating relative to the fixing base 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 base body 1232 to move relative to the fixing base body 1231.

[0109] Referring to FIGS. 8 to 12, in an embodiment, the unlocking mechanism 125 includes a driving wheel 1251, a pulling member 1252, and a first operating member 1253. The driving wheel 1251 is rotatably disposed on the first handle frame 121. The pulling 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 locked position and a first unlocked position. When the first operating member 1253 moves from the first locked position to the first unlocked position, the first operating member 1253 drives the driving wheel 1251 to rotate, and the driving wheel 1251 drives the pulling member 1252 to move, so as to drive the locking mechanism 124 to switch from the locked state to the unlocked state. In other words, the rotation of the driving wheel 1251 drives the pulling member 1252 to move, so that the locking member 1241 is driven to withdraw from the locking recess 1242. More specifically, the pulling member 1252 may be, for example, a pulling rope. An end of the pulling member 1252 is connected to the driving wheel 1251, and another end of the pulling member 1252 is connected to the locking member 1241.

[0110] It should be noted that the driving wheel 1251 may be directly connected to the first handleframe 121, or indirectly connected to the first handle frame 121. In this embodiment, the driving wheel 1251 is indirectly connected to the first handle frame 121, for example, connected to the first handle frame 121 through a second mounting base 1257 as described below.

[0111] Referring to FIGS. 9 to 12, in this embodiment, the handle rod 1213 of the first handle frame 121 has a cavity 1214, that is, the handle rod 1213 can be regarded as a hollow tube. Arod wall of the handle rod 1213 is provided with a mounting port in communication with the cavity 1214. Specifically, a second mounting base 1257 is mounted in the cavity 1214, and the driving wheel 1251 is mounted on the second mounting base 1257 by a first rotating shaft 1258. More specifically, as shown in FIG. 12, the driving wheel 1251 is provided with a first connecting part 12511. The first connecting part 12511 is staggered from the first rotating shaft 1258. The first operating member 1253 has a second connecting part 12531. The first connecting part 12511 and the second connecting part 12531 are connected to each other through a concave-convex cooperation. For example, the first connecting part 12511 may be a connecting post, and the second connecting part 12531 may be a collar. The collar is sleeved outside the connecting post so that the first operating member 1253 is movably connected 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.

[0112] Referring to FIGS. 9, 10 and 12, in this embodiment, the unlocking mechanism 125 further includes a first mounting base 1256. The first mounting base 1256 is connected to the first handle frame 121 and has a receiving cavity 12561. Specifically, the first mounting base 1256 is mounted at the mounting port of the handle rod 1213, and has a third opening 12564 that runs through the top wall of the receiving cavity 12561. The receiving cavity 12561 may be in communication with the cavity 1214 of the handle rod 1213 through the third opening 12564 and the mounting port. Further, the first mounting base 1256 further has a first opening 12562 that runs through the base wall of the receiving cavity 12561. The first operating member 1253 is received in the receiving cavity 12561, and the second connecting part 12531 of the first operating member 1253 extends through the third opening 12564 and the mounting port and is connected to the first connecting part 12511 of the driving wheel 1251. When the first operating member 1253 is in the first locked position, at least a portion of the first operating member 1253 extends out of the receiving cavity 12561 via the first opening 12562 (see FIGS. 8 and 9). In this way, a user can control the driving wheel 1251 to rotate by pushing the portion of the first operating member 1253 extending out of the receiving cavity 12561, therebyrealizing the unlocking.

[0113] Referring to FIG. 6, in an embodiment, the unlocking mechanism 125 further includes a second reset member 1259. The second reset member 1259 abuts against the locking member 1241 and is configured to drive the locking member 1241 to reset so that the locking member 1241 remains in the locked state.

[0114] Referring to FIGS. 8 to 12, in an embodiment, the locking mechanism 124 further includes a second operating member 1254. The second operating member 1254 is pivotally connected to the handle frame 120 and has a locking part 12542 and an operable operating part 12541. The second operating member 1254 is pivotable between a second locked position and a second unlocked position. When the second operating member 1254 is in the second locked position, the locking part 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 in the first unlocked position, the locking part 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 may be prevented from accidentally touching the first operating member 1253, thereby preventing the frame body 100 from being folded.

[0115] Specifically, in this embodiment, as shown in FIGS. 9 and 10, the first mounting base 1256 further has a second opening 12563 extending through the sidewall of the receiving cavity. The locking part 12542 of the second operating member 1254 is received in the receiving cavity 12561, and at least when the second operating member 1254 is in the second locked position, at least a portion of the operating part 12541 extends out of the receiving cavity 12561 via the second opening 12563. More specifically, the second operating member 1254 is pivotally connected to the first mounting base 1256 by the second rotating shaft 1260 (see FIG. 12), and the pivot point is located between the locking part 12542 and the operating part 12541. In this way, the second operating member 1254, when pivoting on the first mounting base 1256, generally forms a "seesaw" structure (see FIGS. 9 and 10). When the operating part 12541 is pressed, the locking part 12542 moves upwards and deviates from the moving path of the first operating member 1253.

[0116] Referring to FIGS. 9, 10 and 12, in an embodiment, the unlocking mechanism 125 further includes a first reset member 1255. The first reset member 1255 abuts against the second operating member 1254 and is configured to bias the operating part 12541 to pivot the second operating member 1254 toward the second locked position. Specifically, the first reset member 1255 is received in the receiving cavity 12561. An end of the first reset member abuts against the second operating member1254, specifically against the operating part 12541, and another end of the first reset member abuts against the second mounting base 1257. In this way, when the user needs to unlock the first handle frame 121 from the second handle frame 122, the user can first press the operating part 12541 of the second operating member 1254 to make the locking part 12542 move upwards and deviate from the moving path of the first operating member 1253; then press the first operating member 1253 upwards, to cause the first operating member 1253 to push the driving wheel 1251 to rotate. As such, driven by the pulling member 1252, the locking member 1241 is moved out of the locking recess 1242. In this case, the user can rotate the first handle frame 121 at will.

[0117] Referring to FIGS. 3 and 4, and FIGS. 13 and 14, in an embodiment, the seat assembly 200 may include a seat part 210 and a backrest part 220. The seat part 210 and the backrest part 220 are pivotally connected to each other at a first pivot point Al, or can pivot around a first pivot axis Al . The seat part 210 is pivotally connected to the frame body 100 at a second pivot point A2, or the seat part 210 and the frame body 100 can pivot around a second pivot axis A2. Specifically, the seat part 210 may be pivotally connected to the first pivot base 130 on the frame body 100 and pivots around the second pivot axis A2. The second pivot axis A2 may coincide with or be parallel to the fourth pivot axis A4. More specifically, in this embodiment, the second pivot axis A2 coincides with the fourth pivot axis A4. When the backrest part 220 and the seat part 210 are arranged at an angle to each other for a child to sit on, the seat part 210 is configured to support the lower body (for example, the hip) of the child, and the backrest part 220 is configured to support the upper body (the back) of the child. More specifically, the seat part 210 includes a seat tube 211 and a seat plate 212. The seat tube 211 is pivotally connected to the frame body 100 at the second pivot point A2. The seat plate 212 is mounted on the seat tube 211 to support the hip of the child.

[0118] Further, in an embodiment, the seat assembly 200 may also include a flexible cloth cover (not shown), which may have a single layer structure or a multi-layer structure. When the flexible cloth cover has a multi-layer structure, a cushioning material such as cotton, foam, etc. is provided between each two layers. In this way, when the flexible cloth cover is disposed outside the seat part 210 and the backrest part 220, it can not only improve the appearance of the seat assembly 200, but also enhance the comfort of the child when riding. In an embodiment, a constraint belt (not shown) is further disposed on the handle frame 120. Specifically, the two ends of the constraint belt are respectively connected to the second support rods 1221 located on the left and right sides. The constraint belt is configured to be tied to the middle part of the backrest part 220 or the end of themiddle part away from the first pivot point Al. In this way, the backrest part 220 may be supported, and when the child sits on the seat plate, the back of the child can lean on the backrest part 220 to improve the comfort of sitting. Further, the length of the constraint belt is adjustable. In this way, the user can indirectly adjust the inclination angle of the backrest part 220 relative to the seat part 210 by adjusting the length of the constraint belt.

[0119] In this embodiment, the flexible cloth cover sleeved outside the backrest part 220 is connected to the second handle frame 122, and the constraint belt extends through the flexible cloth cover and is connected to the second support rods 1221 on both sides. In other words, the portions of the constraint belt other than two ends thereof extend through the flexible cloth cover and are located behind the backrest part 220.

[0120] It should be noted that, unless otherwise clearly specified and defined, the orientational terms such as "front" and "back" or "rear" of the stroller in various embodiments of the present application are based on the "front" and "rear" orientations of the stroller in normal travel, and the "front" and "back" or "rear" directions are schematically shown by arrows B and P in the figures. These orientational terms are only used to make the description of the embodiments of the present application clearer, and are not construed as improperly limiting the scope of protection of the present application.

[0121] Referring to FIGS. 3, 4, 13 and 14, in an embodiment, the folding mechanism 300 includes a driving assembly 310 and a linkage member 320. The driving assembly 310 is pivotally connected between the handle frame 120 and the wheel frame 110. The linkage member 320 is pivotally connected to the driving assembly 310 and the seat part 210. When the frame body 100 is switched 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 handle frame 120, and drives the first pivot point Al of the seat part 210 by the linkage member 320 to rotate upwards around the second pivot point A2 in a first rotating direction W, thereby driving the seat assembly 200 to fold.

[0122] Referring to FIGS. 13 and 14, in an embodiment, the driving assembly 310 includes a driving member 311 and a rotating member 312. The driving member 311 is pivotally connected between the handle frame 120 and the rear wheel frame 112. An end of the rotating member 312 is pivotally connected to the front wheel frame 111, and another end of the rotating member 312 is pivotally connected to the driving member 311 at a first rotation point Bl, or another end of the rotating member 312 and the driving member 311 can pivot around a first rotation axis B 1. When theframe body 100 is in the unfolded state, the first rotation point Bl and a transmission member 313 of the driving assembly 310 are both located between the front wheel frame 111 and the rear wheel frame 112. In this way, when the driving member 311 pivots relative to the rear wheel frame 112, the first rotation point Bl is displaced in the first direction Fl, and drives the rotating member 312 to rotate relative to the front wheel frame 111, so that the front wheel frame 111 pivots relative to the rear wheel frame 112. Further, a first end of the linkage member 320 is pivotally connected to the seat part 210, and a second end of the linkage member 320 is pivotally connected to the driving member 311. In this way, when the driving member 311 pivots relative to the rear wheel frame 112, the driving member 311 can simultaneously drive the linkage member 320 to move relative to the wheel frame 110 to pull or push the seat part 210, so that the first pivot point Al of the seat part 210 can rotate around the second pivot point A2. Specifically, the linkage member 320 and the seat part 210 are pivotally connected to each other at a third pivot point A3, or can pivot around a third pivot axis A3. The third pivot point A3 is located on the side of the second pivot point A2 adjacent to the first pivot point Al . In this way, when the driving member 311 rotates in a counterclockwise direction around a second rotation point B2, the linkage member 320 can move upwards in the first direction Fl relative to the wheel frame 110 as a whole (that is, the third pivot point A3 may be displaced upwards in the first direction Fl), so that the third pivot point A3 can rotate upwards in the first rotating direction W around the second pivot point A2, that is, the seat part 210 can rotate in a clockwise direction around the second pivot point A2, which can realize the folding of the seat part 210. More specifically, in this embodiment, the third pivot point A3 coincides with the first pivot point Al. In this way, the lever arm may be increased, so that the seat part 210 and the backrest part 220 are easier to turn and fold, the specific turning process may be seen below.

[0123] Further, as shown in FIGS. 4, 5 and 7, the driving assembly 310 further includes a transmission member 31. The transmission member 31 is disposed on the driving member 311. A first end of the linkage member 320 is pivotally connected to the seat part 210, and a second end of the linkage member 320 is pivotally connected to the transmission member 313, that is, the second end of the linkage member 320 is pivotally connected to the driving member 311 through the transmission member 313. When the frame body 100 is in the unfolded state, the transmission member 313 is located between the front wheel frame 111 and the rear wheel frame 112. Referring to FIGS. 13 and 14, in an embodiment, the driving member 311 is pivotally connected to the rear wheel frame 112 at the second rotation point B2, or the driving member 311 and the rear wheel frame 112 can pivotaround a second rotation axis B2. An end of the rotating member 312 is pivotally connected to the front wheel frame 111 at a third rotation point B3, or an end of the rotating member 312 and the front wheel frame 111 can pivot around a third rotation axis B3. When the frame body 100 is in the unfolded state, the first rotation point B 1 and the transmission member 313 are both located between the second rotation point B2 and the third rotation point B3. When the driving member 311 pivots around the second rotation point B2, the driving member 311 can drive the rotating member 312 by means of the first rotation point Bl to rotate around the third rotation point B3, and drive the transmission member 313 to rotate around the second rotation point B2, so as to drive the linkage member 320 to move as a whole relative to the frame body 100, thereby causing the first pivot point Al of the seat part 210 to rotate around the second pivot point A2.

[0124] In other unillustrated embodiments, the driving assembly 310 includes the driving member 311 and the transmission member 313. The driving member 311 is pivotally connected between the handle frame 120 and the wheel frame 110, and the transmission member 313 is disposed on the driving member 311. A second end of the linkage member 320 is pivotally connected to the transmission member 313, and a first end of the linkage member 320 is pivotally connected to the seat part 210. When the frame body 100 is switched 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 Al of the seat part 210 rotates upwards around the second pivot point A2 in the first rotating direction W. The transmission member 313 is pivotally connected to the front wheel frame 111 of the wheel frame 110, and the rotating member 312 between the transmission member 313 and the rear wheel frame 112 may be omitted. When the frame body 100 is switched from the unfolded state to the folded state, the rear wheel frame 112 may also be driven by other driving structures to pivot relative to the front wheel frame 111, which is not limited herein.

[0125] Referring to FIGS. 1 and 13, in this embodiment, the driving member 311 is pivotally connected between the first handle frame 121 and the rear wheel frame 112. Specifically, the first handle frame 121 has a push part 1211 at the end adjacent to the second handle frame 122. The driving member 311 is pivotally connected between the push part 1211 and the rear wheel frame 112. The driving member 311 is pivotally connected to the push part 1211 at a fourth rotation point B4, or the driving member 311 and the push part 1211 can pivot around a fourth rotation axis B4. In this way, the fourth rotation point B4, the second rotation point B2, the fourth pivot point A4 and the fifth pivotpoint A5 are connected to cause the corresponding rods to form a four-link structure. Through this four-link structure, the frame body 100 may be switched between the unfolded state and the folded state. In addition, when the frame body 100 is switched between the unfolded state and the folded state, the unfolding and folding of the seat assembly 200 may be realized by components such as the driving member 311, the transmission member 313, and the linkage member 320.

[0126] It should be noted that the "four-link structure" mainly include the second handle frame 122, the push part 1211, the driving member 311 and a portion of the rear wheel frame 112. Specifically, when the first handle frame 121 and the second handle frame 122 turn around the fifth pivot point A5, the push part 1211 can push the driving member 311 to rotate in the counterclockwise direction around the second rotation point B2. In addition, the second handle frame 122 can also rotate in the counterclockwise direction around the fourth pivot point A4 relative to the first pivot base 130, so that the second handle frame 122 gradually approaches the rear wheel frame 112, finishing the folding of the frame body 100.

[0127] 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 turns relative to the second handle frame 122 to fold the handle frame 120, the driving member 311, driven by the push part 1211, may rotate in the counterclockwise direction around the second rotation point B2. During this rotation process, the first rotation point Bl may move upwards in the first direction Fl, so that the rotating member 312 may rotate in the clockwise direction around the first rotation point B3, and drive the transmission member 313 to rotate in the counterclockwise direction around the second rotation point B2. In this way, the linkage member 320 may move upwards in the first direction Fl relative to the frame body 100 as a whole. Therefore, the first pivot point Al of the seat part 210 may rotate upwards in the first rotating direction W around the second pivot point A2, that is, the seat part 210 is rotated in the clockwise direction around the second pivot point A2. Moreover, as described above, when the first handle frame 121 turns relative to the second handle frame 122, the second handle frame 122 may rotate in the counterclockwise direction around the first pivot base 130 to approach the rear wheel frame 122. Since the backrest part 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122 may drive the backrest part 220 to rotate in the counterclockwise direction around the first pivot point Al during the process of approaching the rear wheel frame 122. It may 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 part 220 and the seat part 210 may respectively turn downwards around the first pivot point Al . That is, the backrest part 220 rotates in the counterclockwise direction around the first pivot axis Al, and the seat part 210 rotates in the clockwise direction around the first pivot axis Al. Since the first pivot point Al may gradually move away from the ground during the turning process, the loose flexible cloth cover at the first pivot point Al is less likely to contact the ground, thereby reducing the possibility of wear and tear. As shown in FIGS. 17 to 19, since the seat part 210 is located at the outermost side (i.e., the frontmost side) in the front-back direction of the stroller 1000 after the seat assembly 200 is folded, although the seat part 210 has a large size, the possibility of the seat part 210 interfering with other structures (such as the handle frame 120) during the unfolding and folding process of the seat assembly 200 may be avoided, thereby improving the smoothness of the overall folding of the stroller 1000. In addition, when the seat part 210 is located at the outermost side, it can also prevent the flexible cloth cover accumulated at the pivotal connection between the seat part 210 and the backrest part 220 from abutting against other structures. In this way, the volume of the folded stroller 1000 in this application may be more smaller.

[0128] Optionally, in other alternative embodiments, during the process of the linkage member 320 pushing the first pivot point Al to rotate clockwise around the second pivot point A2, even if the backrest part 220 is not driven to rotate counterclockwise around the first pivot point Al by the flexible cloth cover, under the action of gravity, the end of the backrest part 220 away from the first pivot point Al can still rotate counterclockwise relative to the first pivot point Al.

[0129] In an embodiment, the transmission member 313 is disposed at an angle to the driving member 311. The transmission member 313 is disposed on a side of the driving member 311 away from the seat assembly 200. In this way, the rotation radius of the linkage member 320 relative to the second rotation point B2 may be increased to increase the distance by which the linkage member 320 moves upwards substantially in the first direction Fl, thereby ensuring that the seat assembly 200 may be completely folded.

[0130] FIGS. 13 to FIG. 19 show the folding process of the frame body 100 when the transmission member 313 is disposed on the driving member 311. The frame body 100 shown in FIGS. 13 and 14 is in an unfolded state; the frame body 100 shown in FIGS. 15 and 16 is in a first transition state between the unfolded state and the folded state. The frame body 100 shown in FIGS. 17 and 18 is in a second transition state between the unfolded state and the folded state; and the frame body 100 shown in FIG. 19 is in a folded state. Thus, when the frame body 100 in this embodiment needs to befolded, the second operating member 1254 and the first operating member 1253 are first operated (for example, pressed) to put the locking mechanism 124 in the unlocked state. Subsequently, the first handle frame 121 is rotated around the second pivot base 123 (i.e., the fifth pivot point A5) and folded relative to the second handle frame 122. During the rotation process, the push part 1211 of the first handle frame 121 pushes the driving member 311 downwards, so that the driving member 311 rotates downwards around the second rotation point B2 in the first rotating direction W, that is, the driving member 311 rotates counterclockwise around the second rotation point B2. During the rotation of the driving member 311 around the second rotation point B2, the driving member 311 may drive the first rotation point B 1 and the end of the rotating member 312 pivotally connected to the driving member 311 to move upwards approximately in the first direction Fl, so that the rotating member 312 rotates clockwise relative to the third rotation point B3, thereby changing the distance between the second rotation point B2 and the third rotation point B3. As such, the front wheel frame Ill is pivoted relative to the rear wheel frame 112. In addition, the driving member 311 also drives the transmission member 313 to rotate counterclockwise around the second rotation point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upwards approximately in the first direction Fl. Such movement may push the first pivot point Al to rotate clockwise around the second pivot point A2, thereby folding the seat part 210. In addition, when the first handle frame 121 rotates relative to the second handle frame 122 so that the push part 1211 pushes the driving member 311 downwards, the second handle frame 122 may rotate around the first pivot base 130 (i.e., the fourth pivot point A4) and gradually moves approaching the rear wheel frame 112 until the frame body 100 is folded to the folded state shown in FIG. 19. As the second handle frame 122 gradually approaches the rear wheel frame 112, driven by the second handle frame 122 and the flexible cloth cover connected thereto, the backrest part 220 may rotate counterclockwise with respect to the first pivot point Al, thereby folding the backrest part 220. It may 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 part 220 and the seat part 210 may be respectively turned downwards around the first pivot point Al, so as to complete the folding of the seat assembly 200 and the backrest part 220.

[0131] Referring to FIGS. 14 and 16, in an embodiment, the driving member 311 includes a first driving section 3111 and a second driving section 3112 that are connected to each other. The first driving section 3111 is pivotally connected to the handle frame 120. Specifically, the first drivingsection 3111 is pivotally connected to the push part 1211 of the first handle frame 121 (see FIG. 13). The second driving section 3112 is pivotally connected to the rear wheel frame 112 at the second rotation point B2, and is pivotally connected to the rotating member 312 at the first rotation point B 1. The transmission member 313 is connected to the second driving section 3112 and is arranged at an angle to the second driving section 3112. Specifically, a first angle al is formed between the first driving section 3111 and the second driving section 3112. At least when the frame body 100 is in the unfolded state, the opening of the first angle al between the first driving section 3111 and the second driving section 3112 faces upwards in the first direction Fl. Specifically, the first angle al between the first driving section 3111 and the second driving section 3112 is an obtuse angle. When the frame body 100 is in the unfolded state, the opening of the first angle al is set obliquely upwards in the first direction Fl. In this way, when the second driving section 3112 moves upwards (that is, when the second driving section 3112 rotates counterclockwise around the second rotation point B2), the first rotation point Bl can be more easily driven to move upwards, and the front wheel frame 111 can quickly approach the rear wheel frame 112. In another alternative embodiment, the first angle al between the first driving section 3111 and the second driving section 3112 may be a right angle or an acute angle, which may be set specifically according to actual needs. It should be noted that the first driving section 3111 and the second driving section 3112 may be fixedly connected (such as integrally formed) or detachably connected (such as threadedly connected, or engaged with each other), which is not specifically limited herein.

[0132] Referring to FIGS. 14 and 16, in an embodiment, at least a portion of the transmission member 313 is located on the side of the second driving section 3112 away from the opening of the first angle al. In this way, the length of the linkage member 320 is increased, and the force direction at the pivot point (i.e., A6) between the linkage member 320 and the transmission member 313 when the driving member 311 rotates is changed, and the rotation force arm of the linkage member 320 is increased, so that the rotation process of the seat part 210 around the second pivot point A2 is smoother. In addition, since the pivot point (i.e. A6) between the linkage member 320 and the transmission member 313 is offset from the second rotation point B2, that is, the pivot point A6 is set outside the straight line connecting the first rotation point Bl to the second rotation point B2, the rotation radius of the linkage member 320 when rotating relative to the second rotation point B2 is increased, so that the moving distance of the linkage member 320 when moving upwards approximately in the first direction Fl is increased, thereby ensuring that the seat assembly 200 maybe completely folded, and improving the reliability of folding. In some embodiments, the transmission member 313 may be fixedly connected to the second driving section 3112, for example, the transmission member 313 may be integrally formed on the second driving section 3112. In other alternative embodiments, the transmission member 313 may be detachably connected to the second driving section 3112, for example, the transmission member 313 may be connected to the second driving section 3112 by fasteners such as screws, which is not specifically limited herein.

[0133] Referring to FIGS. 16 and 18, in some embodiments, the transmission member 313 includes a first segment 3131 and a second segment 3132 that are connected to each other. A second angle a2 is formed between the first segment 3131 and the second segment 3132. The first segment 3131 is stacked on the driving member 311 and is located between the first rotation point B 1 and the second rotation point B2. The second segment 3132 is pivotally connected to the linkage member 320. At least when the frame body 100 is in the unfolded state, the opening of the second angle a2 faces downwards in the first direction Fl. Specifically, the first segment 3131 is stacked on and fixedly connected to the second driving segment 3112, and the opening of the second angle a2 is facing away from the opening of the first angle al. More specifically, the linkage member 320 is pivotally connected to an end of the second segment 3132 away from the first segment 3131. Thus, when the transmission member 313 rotates around the second rotation point B2 with the driving member 311, the linkage member 320 may be more easily driven to move upwards or downwards approximately in the first direction Fl, so as to drive the seat assembly 200 to fold in the correct direction and avoid the “stuck” phenomenon.

[0134] In combination with the frame body 100, the seat assembly 200 and the folding mechanism 300 as described above, the working principle of the stroller 1000 will be described in detail below with reference to FIGS. 13 to 19.

[0135] Referring to FIGS. 13 and 14, when the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state (see FIG. 6), the first handle frame 121 and the second handle frame 122 remain fixed relative to each other, that is, the push part 1211 also remains relatively fixed. Since the second handle frame 122, the push part 1211, the driving member 311 and the rear wheel frame 112 constitute the four-link structure, when the first handle frame 121 and the second handle frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and are not movable, so that the second handle frame 122, the driving member 311 and the rear wheel frame 112 remain fixed relative to one another and are not rotatable relative to one another,and finally the frame body 100 may be stably maintained in the unfolded state. In this case, since the driving member 311 is fixed, the transmission member 313 and the linkage member 320 are fixed, so that the seat part 210 may be stably supported on the first pivot base 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 to each other, the rotating member 312 and the second driving section 3112 are approximately in the same horizontal plane, and the front wheel frame 111, the rear wheel frame 112 and the partial structure of the driving assembly 310 (for example, the second driving section 3112 and the rotating member 312) may collectively form a triangular structure. As such, the front wheel frame 111 and the rear wheel frame 112 may be kept fixed relative to each other, so that the frame body 100 may be stably maintained in the unfolded state.

[0136] 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 unlocking mechanism 125 is pressed to switch the locking mechanism 124 to the unlocked state. Specifically, the operating part 12541 of the second operating member 1254 is first pressed, to cause the locking part 12542 to deviate from the moving path of the first operating member 1253, and then the first operating member 1253 is pressed so that the driving wheel 1251 is pushed to rotate. As such, the pulling member 1252 may be driven to move to pull the locking member 1241 to withdraw from the locking recess 1242. Subsequently, the first handle frame 121 is rotated clockwise around the second pivot base 123 (or around the fifth pivot point A5) to be folded relative to the second handle frame 122. During the rotation process, the push part 1211 of the first handle frame 121 pushes the first driving section 3111 of the driving member 311 downwards, so that the entirety of the driving member 311 rotates counterclockwise around the second rotation point B2. At this time, the first driving section 3111 of the driving member 311 rotates downwards around the second rotation point B2, and the second driving section 3112 of the driving member 311 rotates upwards around the second rotation point B2. As the second driving section 3112 rotates, the first rotation point Bl connected thereto moves upwards. The first rotation point Bl, when moving upwards, drives the rotating member 312 to move upwards, so that the rotating member 312 pivots in the clockwise direction around the third rotation point B3. In this way, this process reduces the distance between the second rotation point B2 and the third rotation point B3, so that the front wheel frame 111 and the rear wheel frame 112 approach each other, thereby realizing the folding of the frame body 100. In addition, during the rotation process, the second driving section 3112 may also drive the transmission member 313 torotate counterclockwise relative to the second rotation point B2, thereby driving the linkage member 320 to pivot relative to the transmission member 313 and move upwards approximately in the first direction Fl, and such movement may drive the first pivot point Al to rotate clockwise around the second pivot point A2, thereby driving the seat part 210 to fold. During the folding process of the hand frame 120, the second handle frame 122 may rotate counterclockwise around the first pivot base 130 to approach the rear wheel frame 122. Since the backrest part 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122 may drive the backrest part 220 to rotate counterclockwise around the first pivot point Al during the process of approaching the rear wheel frame 122, thus achieving the folding of the backrest part 220.

[0137] 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 base 123 (or around the fifth pivot point A5) until the first handle frame 121 and the second handle frame 122 are in the same plane. During this rotation process, the push part 1211 of the first handle frame 121 pulls the first driving section 3111 of the driving member 311 upwards, so that the entirety of the driving member 311 rotates clockwise around the second rotation point B2. In this case, the first driving section 3111 of the driving member 311 rotates upwards around the second rotation point B2, and the second driving section 3112 of the driving member 311 rotates downwards around the second rotation point B2. As the second driving section 3112 rotates, the first rotation point Bl connected thereto moves downwards. The first rotation point Bl, when moving downwards, may drive the rotating member 312 to move downwards, so that the rotating member 312 pivots counterclockwise around the third rotation point B3. As such, during this process, the distance between the second rotation point B2 and the third rotation point B3 may be increased, so that the front wheel frame 111 and the rear wheel frame 112 move away from each other, thereby realizing the unfolding of the frame body 100. In addition, during the rotation process, the second driving section 3112 may also drive the transmission member 313 to rotate clockwise around the second rotation point B2, and during this rotation process, the transmission member 313 may move approximately downwards in the first direction Fl, so that the linkage member 320 can pivot relative to the transmission member 313 and move approximately downwards in the first direction Fl with the transmission member 313. As such, the third pivot point of the seat part 210 may be pulled downwards, so that the seat part 210 rotates counterclockwise around the second pivot point A2, and finally the seat part 210 is driven to be unfold. During the unfolding of the handle frame 120, the second handle frame 122 may rotate in theclockwise direction around the first pivot base 130 to move away from the rear wheel frame 122, and since the backrest part 220 is connected to the second handle frame 122 through the flexible cloth cover, the second handle frame 122, when moving away from the rear wheel frame 122, may drive the backrest part 220 to rotate in the clockwise direction around the first pivot point Al, thereby achieving the unfolding of the backrest part 220.

[0138] According to the above description, in the stroller 1000 of the present application, the seat part 210 and the backrest part 220 are pivotally connected to each other at the first pivot point Al; the seat part 210 and the first pivot base 130 are pivotally connected each other at the second pivot point A2; the driving assembly 310 in the folding mechanism 300 is pivotally connected between the handle frame 120 and the wheel frame 110; and the linkage member 320 is pivotally connected to the driving assembly 310 and the seat part 210 respectively. In addition, when the frame body 100 is switched from the unfolded state to the folded state, the driving assembly 310 is pivotable relative to the wheel frame 110 or the handle frame 120, and can drive the first pivot point Al of the seat part 210 to rotate upwards around the second pivot point A2 through the linkage member 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 only needs to be pivoted relative to the wheel frame 110. Under the coordinated action of the driving assembly 310 and the linkage member 320, the first pivot point Al of the seat part 210 may rotate upwards around the second pivot point A2, that is, the first pivot point Al moves away from the ground. In addition, under the action of the second handle frame and the flexible cloth cover, the backrest part 220 may rotate counterclockwise around the first pivot point Al to move toward the ground. In other words, when the frame body 100 is folded, driven and linked by the folding mechanism 300, the backrest part 220 and the seat part 210 may be respectively turned downwards around the first pivot point Al, so that the loose flexible cloth cover at the first pivot point Al is less likely to contact the ground, thereby reducing the possibility of wear and tear. Moreover, since the driving assembly 310 of the present application includes the transmission member 313 that is disposed between the first rotation point Bl 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 al, so when the linkage member 320 is pivotally connected between the transmission member 313 and the seat part 210, and when the frame body 100 is folded, the protruding transmission member 313 increases the length of the linkage member 320, and changes the force directions at the pivot point A6 of the linkage member 320 and the transmission member 313 when the driving member 311 rotates, which can increase therotation force arm, and make the rotation process of the seat part 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 linkage member 320 is moved upwards in the first direction Fl by an increased distance., thereby ensuring that the seat assembly 200 may be completely folded, and improving the reliability of the folding of the seat assembly 200. Furthermore, since the linkage member 320 is pivotally connected between the transmission member 313 and the seat part 210, when the transmission member 313 drives the linkage member 320 to rotate and move upwards or downwards approximately in the first direction F 1 , the mutual pivoting manner can provide freedom of movement for the relative movement between the driving member 311 and the seat part 210, thereby allowing the rotation of the driving member 311 to drive the seat part 210 to pivot.

[0139] Optionally, in some alternative embodiments, a first end of the linkage member 320 is pivotally connected to the seat part 210, and a second end of the linkage member 320 is pivotally connected 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 may drive the first rotation point B 1 to move in the first direction F 1 , 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 pivotally connected to the rotating member 312, the linkage member 320 can still push the seat part 210 to rotate around the second pivot axis A2. Further, the transmission member 313 is disposed on the rotating member 312, the first end of the linkage member 320 is pivotally connected to the seat part 210, and the second end of the linkage member 320 is pivotally connected to the transmission member 313, that is, the second end of the linkage member 320 is pivotally connected to the rotating member 312 through the transmission member 313. Specifically, when the frame body 100 is in the unfolded state, the transmission member 313 is located between the front wheel frame 111 and the rear wheel frame 112, and between the first rotation point Bl and the third rotation point B3.

[0140] When the frame body 100 is switched from the unfolded state to the folded state, that is, when the first handle frame 121 is turned relative to the second handle frame 122 to fold the handle frame 120, driven by the push part 1211, the driving member 311 may rotate counterclockwise around the second rotation point B2. During this rotation process, the first rotation point B 1 moves upwardsin the first direction Fl, 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 may move upwards in the first direction Fl relative to the whole frame body 100. Therefore, the first pivot point Al of the seat part 210 may rotate upwards around the second pivot point A2 in the first rotating direction W, that is, the seat part 210 is rotated in the clockwise direction around the second pivot point A2 to achieve the folding of the seat part 210. When the frame body 100 is switched from the folded state to the unfolded state, that is, when the first handle frame 121 is turned relative to the second handle frame 122 to unfold the handle frame 120, driven by the push part 1211, the driving member 311 may rotate clockwise around the second rotation point B2. During this rotation process, the first rotation point Bl moves downwards in the first direction Fl, 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 may move downwards in the first direction Fl relative to the whole frame body 100. Therefore, the first pivot point Al of the seat part 210 may rotate downwards around the second pivot point A2 in the first rotating direction W, that is, the seat part 210 may be rotated counterclockwise around the second pivot point A2 to achieve the unfolding of the seat part 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 part 220 in this embodiment is substantially the same as those of the backrest part 220 when the transmission member 313 is disposed on the driving member 311, and which will not be described in detail herein.

[0141] In the aforementioned stroller 1000, since the wheel frame 110 and the handle frame 120 in the frame body 100 are pivotally connected to each other, the frame body 100 has the unfolded state and the folded state, and may be switched between the unfolded state and the folded state. Furthermore, since the seat part 210 and the backrest part 220 in the seat assembly 200 are pivotally connected to each other at the first pivot point Al, and the seat part 210 is pivotally connected to the frame body 100 (for example, the first pivot base 130) at the second pivot point A2, the driving assembly 310 of the folding mechanism 300 is pivotally connected between the handle frame 120 and the wheel frame 110, and the linkage member 320 of the folding mechanism 300 is pivotally connected to the driving assembly 310 and the seat part 210 respectively. In addition, when the frame body 100 is switched from the unfolded state to the folded state, the driving assembly 310 can pivotrelative to the wheel frame 110 or the handle frame 120 and drive the first pivot point Al of the seat part 210 to rotate upwards around the second pivot point A2 through the linkage member 320. Therefore, when the stroller 1000 is placed on the ground and needs to be folded, the handle frame 120 only needs to be pivoted relative to the wheel frame 100, and under the coordinated action of the driving assembly 310 and the linkage member 320, the first pivot point Al of the seat part 210 may rotate upwards around the second pivot point A2, that is, the first pivot point Al moves away from the ground, so as to achieve the folding of the seat part 210. Since the handle frame 120 may gradually approach the ground during the folding process of the frame body 100, and the backrest part 220 is connected to the handle frame 120 through the flexible cloth cover, so during the folding process of the frame body 100, under the action of the flexible cloth cover, the backrest part 220 may move downwards around the first pivot point Al, that is, the end of the backrest part 220 away from the first pivot point Al is moved toward the ground, so that the folding of the backrest part 220 may be achieved. It can be seen that during the folding process of the frame body 100, the backrest part 220 and the seat part 210 may be receptively turned downwards around the first pivot point Al, so that the loose flexible cloth cover at the first pivot point Al is less likely to contact the ground, thereby reducing the possibility of wear and tear of the flexible cloth cover. In addition, since the seat part 210 is located at the outermost side (for example, the frontmost side) in the front-back direction of the stroller 1000 after the seat assembly 200 is folded (see FIG. 19), even if the seat part 210 has a large size, the possibility of the seat part 210 interfering with other structures (such as the handle frame 120) during the unfolding and folding process of the seat assembly 200 may be avoided, thereby improving the smoothness of the overall folding of the stroller 1000. In addition, when the seat part 210 is located at the outermost side, it can also avoid the flexible cloth cover, which is accumulated at the pivot portion between the seat part 210 and the backrest part 220, from abutting against other structures. In this way, the volume of the stroller 1000 after folded in this application may be made smaller.

[0142] The stroller according to the embodiment of the present application can effectively prevent the loose cloth cover from contacting the ground when folded.

[0143] In the stroller according to the present application, since the wheel frame and the handle frame of the frame body are pivotally connected to each other, the frame body has the unfolded state and the folded state, and may be switched between the unfolded state and the folded state. Furthermore, the seat part and the backrest part of the seat assembly are pivotally connected to eachother at the first pivot point; and the seat part and the frame body are pivotally connected to each other at the second pivot point; the driving assembly of the folding mechanism is pivotally connected between the handle frame and the wheel frame; and the linkage member is pivotally connected to the driving assembly and the seat part respectively; and when the frame body is switched from the unfolded state to the folded state, the driving assembly can pivot relative to the wheel frame or the handle frame and drive the first pivot point of the seat part to rotate upwards around the second pivot point through the linkage member. As such, when the stroller is placed on the ground and needs to be folded, the handle frame only needs to be pivoted relative to the wheel frame. Under the coordinated action of the driving assembly and the linkage member, the first pivot point of the seat part may rotate upwards around the second pivot point, that is, the first pivot point moves in a direction away from the ground, so that the seat may be folded. In addition, during this process, the end of the backrest part away from the first pivot point may move in a direction approaching the ground. In other words, during the process of the seat part pivoting around the second pivot point, each of the backrest part and the seat part may be turned downwards around the first pivot point, so that the loose flexible cloth cover at the first pivot point is less likely to contact the ground, thereby reducing the possibility of wear and tear.

[0144] FIGS. 21 and 22 show a stroller 1000 according to another embodiment of the present application, and the structure of the stroller 1000 is substantially symmetrical in the left-right direction. The stroller 1000 may include, for example, a frame body 100, a basket rod assembly 500, and a folding mechanism 300. The frame body 100 includes a wheel frame 110 and a handle frame 120. The handle frame 120 and the wheel frame 110 are pivotally connected to each other so that the frame body 100 may be switched between an unfolded state (see FIGS. 21 and 22) and a folded state (FIGS. 32 and 33). The basket rod assembly 500 is pivotally connected to the wheel frame 110 and has an unfolded state (see FIGS. 21 and 22) and a folded state (FIGS. 32 and 33).

[0145] As shown in FIGS. 23 and 25, the folding mechanism 300 includes a driving assembly 310 and a linking component 330. The driving assembly 310 is pivotally connected between the handle frame 120 and the wheel frame 110, and is movably connected to the basket rod assembly 500 through the linking component 330. The driving assembly 310 may also be pivotally connected to the wheel frame 110 (specifically, the rear wheel frame 112) at a second rotation point B2, or the driving assembly 310 and the wheel frame 110 can pivot around a second rotation axis B2. In this embodiment, the linking component 330 is pivotally connected to the basket rod assembly 500 and the drivingassembly 310. When the frame body 100 is switched between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linking component 330 can move as a whole relative to the frame body 100 and pivot relative to the driving assembly 310, thereby driving the basket rod assembly 500 to switch between the unfolded state and the folded state. In another alternative embodiment, the linking component 330 may be movably connected to the basket rod assembly 500 and movably connected to the driving assembly 310. When the frame body 100 is switched between the unfolded state and the folded state, the driving assembly 310 rotates relative to the wheel frame 110, so that the linking component 330 moves as a whole relative to the frame body 100 and drives the basket rod assembly 500 to rotate, thereby driving the basket rod assembly 500 to switch between the unfolded state and the folded state.

[0146] According to the stroller 1000 and the child carrier of the embodiments of the present application, when the stroller 1000 is folded, the driving assembly 310 directly drives the linking component 330 to move as a whole relative to the frame body 100 by directly folding the frame body 100, thereby driving the basket rod assembly 500 to switch from the unfolded 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.

[0147] The frame body 100, the basket rod assembly 500 and the folding mechanism 300 will be further described below one by one.

[0148] Referring to FIGS. 21 to 23, in an embodiment, the frame body 100 may include the wheel frame 110 and the handle frame 120. 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.

[0149] The front wheel frame 111 is in, 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 in the second direction F2, which is the left-right direction. At least one front wheel seat 611 is mounted at the bottom of the front wheel frame 111. In this embodiment, two front wheel seats 611 are mounted at the bottom of the front wheel frame 111. The two front wheel seats 611 are spaced apart in the left-right direction (i.e., in the second direction F2). The front wheel frame 111 in this embodiment has the same configuration as the that of the front wheel frame 111 in the above embodiment. Therefore, for the specific configuration and connection of the front wheel frame 111, reference may be made to the abovedescription, and which will not be repeatedly described herein.

[0150] Referring to FIGS. 21 to 23, the rear wheel frame 112 is in, 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. The rear cross bar 1122 extends in the second direction F2. At least one rear wheel seat 621 is mounted at the bottom of the rear wheel frame 112. In this embodiment, two rear wheel seats 621 are mounted at the bottom of the rear wheel frame 112. The two rear wheel seats 621 are spaced apart in the left-right direction (i.e., the second direction F2). The rear wheel frame 112 in this embodiment has the same configuration as that of the rear wheel frame 112 in the above-mentioned embodiment, so for the specific configuration and connection of the rear wheel frame 112, reference may be made to the above description, and which will not be repeatedly described herein.

[0151] Referring to FIGS. 23 to 25, the frame body 100 further includes a first pivot base 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 A4 via the first pivot base 130, or can pivot around the fourth pivot axis A4 via the first pivot base 130, so that the front wheel frame 111 can rotate relative to the rear wheel frame 112 around the fourth pivot point A4. Specifically, each of the upper ends of the two rear rods 1121 is pivotally connected to the corresponding upper end of the front rod 1111 on the same side, for example, through the first pivot base 130. That is, each rear rod 1121 on one side is rotatable relative to the corresponding front rod 1111 on the one side around the fourth pivot point A4 of the corresponding first pivot base 130. In this way, the volume of the wheel frame 110 may be changed, so that the frame body 100 may be switched between the unfolded state and the folded state. More specifically, the first pivot base 130 includes a first base body 131 and a second base body 132. The first base body 131 and the second base body 132 overlap each other, and coaxially pivots around the fourth pivot point A4. A connecting part of the first base body 131 is connected to the front rod 1111, and a connecting part of the second base body 132 is connected to the rear rod 1121.

[0152] Referring to FIGS. 23 to 25, the handle frame 120 may be pivotally connected to the wheel frame 110 by the first pivot base 130, and is rotatable around the fourth pivot point A4. Specifically, the first pivot base 130 further includes a third base body 133. The third base body 133 overlaps the second base body 132 and the first base body 131. The third base body 133, the second base body 132 and the first base body 131 can coaxially pivot around the fourth pivot point A4. A connecting part of the third base body 133 is connected to the handle frame 120.

[0153] Referring to FIGS. 21 and 22, the handle frame 120 may further include a second pivot base 123. The second pivot base 123 has a fifth pivot point A5. The first handle frame 121 and the second handle frame 122 are pivotally connected to the fifth pivot point A5 via the second pivot base 123. That is, the first support rod 1212 on one side is pivotally connected to the second support rod 1221 on the one side by the corresponding second pivot base 123, and the first support rod 1212 is rotatable relative to the second support rod 1221 around the fifth pivot point A5. The second pivot base 123 may include a fixing base body 1231 and a pivot base body 1232.

[0154] The first pivot base 130 and the second pivot base 123 in this embodiment have the same configurations as those of the first pivot base 130 and the second pivot base 123 in the above- mentioned embodiments. Therefore, for the specific configurations and connections of the first pivot base 130 and the second pivot base 123, reference may be made to the above description and will not be repeatedly described herein.

[0155] Referring to FIGS. 26, 28 and 30, in an embodiment, the first handle frame 121 has a push part 1211 at the end adjacent to the second handle frame 122. The driving member 311 is pivotally connected between the push part 1211 and the rear wheel frame 112 at a fourth rotation point B4. In this way, the fourth rotation point B4, the second rotation point B2, the fourth pivot point A4 and the fifth pivot point A5 are connected to cause the corresponding rods to form a four-link structure. Through this four-link structure, the frame body 100 may be switched between the unfolded state and the folded state. It should be noted that the rods of the "four-link structure" generally include the second handle frame 122, the push part 1211, the first driving section 3111 of the driving assembly 310 and a portion of the rear wheel frame 112.

[0156] Referring to FIGS. 21, 34 and 35, in an embodiment, the frame body 100 further includes a locking mechanism 124 and an unlocking mechanism 125. The locking mechanism 124 is disposed in the second pivot base 123. The locking mechanism 124 has a locked state in which the relative rotation between the first handle frame 121 and the second handle frame 122 is restricted, and an unlocked state in which the first handle frame 121 and the second handle frame 122 are allowed to rotate relative to each other. The unlocking mechanism 125 is operably connected to the locking mechanism 124 to allow the locking mechanism 124 to switch between the locked state and the unlocked 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 a3 between the first handleframe 121 and the second handle frame 122 is 180 degrees. The locking mechanism 124 can prevent 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 a3 between the first handle frame 121 and the second handle frame 122 is an acute angle (see FIG. 32) or approaches 0 degrees. In another alternative embodiment, when the frame body 100 is in the unfolded state, the angle a3 between the first handle frame 121 and the second handle frame 122 may be an obtuse angle or an acute angle.

[0157] Referring to FIGS. 34 and 35, in an 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 base body 1232. the locking recess 1242 is formed on the fixing base body 1231. When the locking mechanism 124 is in the locked state, the locking member 1241 is inserted into the locking recess 1242 to restrict the rotation of the pivot base body 1232 relative to the fixing base 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 base body 1232 to rotate relative to the fixing base body 1231.

[0158] Still referring to FIGS. 34 and 35, the unlocking 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 unlocking mechanism 125 is configured to control the locking mechanism 124 to switch between the locked state and the unlocked state, so as to restrict or allow the relative rotation between the first handle frame 121 and the second handle frame 122. Specifically, the unlocking mechanism 125 includes an unlocking operating member 12510, an unlocking traction member 12520, and an elastic reset member 12530. An end of the unlocking traction member 12520 is connected to the unlocking operating member 12510, and another end of the unlocking traction member 12520 is connected to the locking member 1241. In this way, when the unlocking operating member 12510 is pressed, the locking member 1241 may be pulled by the unlocking traction member 12520 to move out of the locking recess 1242. The elastic reset member 12530 abuts against the locking member 1241, and is configured to drive the locking member 1241 to reset, to cause the locking member 1241 to remain in the locked state. Specifically, in this embodiment, the unlocking mechanism 125 is disposed on the first handle frame 121. The unlocking operating member 12510 is movably disposed on the first handle frame 121, and more specifically, is movably disposed on the handle rod 1213. The unlocking traction member 12520 is located in the handle rod 1213 and the first support rod 1212and is connected between the unlocking operating member 12510 and the locking member 1241. In another alternative embodiment, the unlocking operating member 12510 may also be disposed on the first support rod 1212 or the second support rod 1221, which is not specifically limited herein.

[0159] FIGS. 26 to 32 show the folding process of the frame body 100. The stroller 100 shown in FIGS. 26 and 27 is in the unfolded state; the stroller 100 shown in FIGS. 28 and 29 is in a first transition state between the unfolded state and the folded state; the stroller 100 shown in FIGS. 30 and 31 is in a second transition state between the unfolded state and the folded state; and the stroller 100 shown 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 unlocking mechanism 125 is operated (for example, pressed) to put the locking mechanism 124 in the unlocked state. Thereafter, the first handle frame 121 is rotated around the second pivot base 123 (i.e., around fifth pivot point A5) and folded relative to the second handle frame 122. During this rotation process, the push part 1211 of the first handle frame 121 pushes the driving assembly 310 downwards, so that the driving assembly 310 rotates around the second rotation point B2 in the clockwise direction W2, thereby driving the linking 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 part 1211 pushes the driving assembly 310 downwards, the second handle frame 122 may rotate around the first pivot base 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 shown in FIGS. 32 and 33.

[0160] Referring to FIGS. 23 and 25, in an embodiment, the basket rod assembly 500 may be configured to support a basket (not shown), or the basket may be mounted on the basket rod assembly 500, so that the user can place some of the personal items in the basket, which can reduce the burden of carrying. Specifically, the basket rod assembly 500 may include a front tube body 510 and a rear tube body 520 that are pivotally connected. The front tube body 510 is pivotally connected to the front wheel frame 111 at a seventh pivot point A7, or the front tube body 510 and the front wheel frame 111 can pivot around a seventh pivot axis A7. The front tube body 510 is pivotally connected to the rear tube body 520 at a fifth rotation point B5, or the front tube body 510 and the rear tube body 520 can pivot around a fifth rotation axis B5. The rear tube body 520 is pivotally connected to the rear wheel frame 112 at an eighth pivot point, or the rear tube body 520 and the rear wheel frame 112 can pivot around an eighth pivot axis A8. In this way, the basket rod assembly 500 may be folded byrotating the front tube body 510 around the seventh pivot point A7, rotating the rear tube body 520 around the eighth pivot point A8, and rotating the front tube body 510 relative to the rear tube body 520 around the fifth rotation point B5, and further, the basket rod assembly 500 may be switched between the unfolded state and the folded state. The seventh pivot axis A7, the fifth rotation axis B5 and the eighth pivot axis A8 are parallel to each other. More specifically, the fourth pivot axis A4 and the seventh pivot axis A7 are also parallel to each other.

[0161] Specifically, in this embodiment, as shown in FIGS. 23 and 25, the front tube body 510 includes two front basket rods 513 spaced apart and arranged side by side. Each of first ends of the two front basket rods 513 is respectively pivotally connected to the corresponding front rod 1111 on the same side of the front wheel frame 111 at the seventh pivot point A7. The rear tube body 520 has a U-shaped structure, which includes two rear basket rods 521 located on the left and right sides and a connecting rod 522 connected between the two rear basket rods 521 (see FIG. 35). Each of the two rear basket rods 521 is pivotally connected to the corresponding rear rod 1121 on the same side of the rear wheel frame 112 at the eighth pivot point A8, and is pivotally connected to a second end of the corresponding front basket rod 513 on the same side at the fifth rotation point B5. The left and right sides of the basket rod assembly 500 are respectively pivotally connected to the left and right sides of the frame body 100, so that the stability of the basket rod assembly 500 in supporting the basket may be improved.

[0162] In order to facilitate the rotation of the rear tube body 520 relative to the front tube body 510, i.e., to facilitate turning the basket rod assembly 500, and improve the smoothness of the basket rod assembly 500 switching from the unfolded state to the folded state, in an embodiment, as shown in FIG. 25, the front tube body 510 includes first tube sections 511 and second tube sections 512 that are arranged at an angle to each other. Specifically, each front basket rod 513 includes the first tube section 511 and the second tube section 512 that are arranged at an angle to each other, that is, each front basket rod 513 has an L-shaped structure. An end of the first tube section 511 away from the second tube section 512 is pivotally connected to the front wheel frame 111 at the seventh pivot point A7, and an end of the second tube section 512 away from the first tube section 511 is pivotally connected to the rear tube body 520 at the fifth pivot point B5. The opening of the angle a4 between the first tube section 511 and the second tube section 512 faces downwards in the first direction Fl. In this way, the fifth rotation point B5 may be prevented from having a hinge dead point, thereby improving the reliability during turning the front tube body 510 and the rear tube body 520. It shouldbe noted that the first direction Fl refers to the vertical direction, which, in this embodiment refers to the height direction of the frame body 100 when the frame body 100 is in the unfolded state.

[0163] Referring to FIGS. 26 and 27, when the basket rod assembly 500 is in the unfolded state, an angle a5 between the first tube section 511 and the rear tube body 520 is substantially 180 degrees (see FIG. 27). Referring to FIGS. 32 and 33, when the basket rod assembly 500 is in the folded state, the angle a5 between the first tube section 511 and the rear tube body 520 is an acute angle or substantially 0 degrees (see FIG. 32). It should be noted that when the basket rod assembly 500 is in the folded state, the angle a5 between the first tube section 511 and the rear tube body 520 may be either an acute angle or substantially 0 degrees, which may be determined according to actual conditions. In this embodiment, as shown in FIGS. 27, 29, 31 and 33, when the frame body 100 is switched from the unfolded state to the folded state, the basket rod assembly 500 also is switched from the unfolded state to the folded state. During this process, the angle a5 between the first tube section 511 and the rear tube body 520 gradually changes from 180 degrees to an acute angle.

[0164] It should be noted that the above “the driving assembly 310 is pivotally connected between the handle frame 120 and the wheel frame 110” includes at least two examples as follows.

[0165] Referring to FIGS. 26 to 29, in an example, the driving assembly 310 of the folding mechanism 300 is pivotally connected between the rear wheel frame 112 and the handle frame 120, the linking component 330 is pivotally connected to the driving assembly 310 and the rear tube body 520, so that the rear tube body 520 may be driven to rotate around the eighth pivot point A8, and rotate relative to the front tube body 510 around the fifth rotation point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111. In an example, the driving assembly 310 has a rod-shaped structure, and has a first driving section 3111 and a second driving section 3112. Each of the first driving section 3111 and the second driving section 3112 has a first end and a second end. The first end of the first driving section 3111 and the first end of the second driving section 311 are apart from each other, and the second end of the first driving section 3111 and the second end of the second driving section 311 are connected together.

[0166] The first end of the first driving section 3111 is pivotally connected to the first handle frame 121 of the handle frame 120, the first end of the second driving section 3112 is pivotally connected to the linking component 330. The second rotation point B2 is located between the first driving section 3111 and the second driving section 3112. Specifically, the second rotation point B2 is located at the connection between the second end of the first driving section 3111 and the secondend of the second driving section 3112. In other words, the second end of the first driving section 3111 and the second end of the second driving section 3112 are connected to the second rotational point B2. The second rotation point B2 is closer to the first end of the second driving section 3112 of the driving assembly 310 than the first end of the first driving section 3111. In this way, when the frame body 100 is in the unfolded state (see FIGS. 26 and 27), the second driving section 3112 of the driving assembly 310 may be considered to be located between the front wheel frame 111 and the rear wheel frame 112, that is, a pivot point Cl between the linking 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 rotation point B2, the driving assembly 310 may drive the linking component 330 to move as a whole relative to the rear wheel frame 112 around the pivot point B2 and cause the linking component 330 to pivot relative to the driving assembly 310, thereby driving the fifth rotation point B5 between the rear tube body 520 and the front tube body 510 to move as a whole, for example, move in the direction approaching the first pivot base 130, thereby causing the rear tube body 520 to rotate around the eighth pivot point A8 and causing the front tube body 510 to rotate around the seventh pivot point A7. As such, the distance between the eighth pivot point A8 and the seventh pivot point A7 changes, and the rear wheel frame 112 pivots relative to the front wheel frame 111. It can be understood that the second rotation point B2 is closer to the first end of the second driving section 3112 of the driving assembly 310 than the first end of the first driving section 3111, so that the length of the first driving section 3111 is greater than the length of the second driving section 3112, and the force arm is longer and more labor-efficient when the driving assembly 310 is operated to fold the frame body 100.

[0167] Still referring to FIGS. 26 to 29, the driving assembly 310 is pivotally connected between the handle frame 120 and the rear wheel frame 112. The driving assembly 310 is also pivotally connected to the rear wheel frame 112 (specifically, the respective rear rod 1121) at the second rotation point B2, or the driving assembly 310 and the rear wheel frame 112 may pivot around the second rotation axis B2. The second rotation axis B2 is parallel to the eighth pivot axis A8. The linking component 330 is pivotally connected to the driving assembly 310 and the rear tube body 520 (specifically, the rear basket rod 521). A pivot point C2 between the linking component 330 and the rear tube body 520 (for example, the rear basket rod 521) is located between the fifth rotation point B5 and the eighth pivot point A8, and the pivot point C2 is closer to the fifth rotation point B5.

[0168] In another alternative unillustrated example, the driving assembly 310 may also bepivotally connected between the front wheel frame 111 and the handle frame 120. Specifically, the first driving section 3111 of the driving assembly 310 is pivotally connected to the handle frame 120, and the second driving section 3112 of the driving assembly 310 is pivotally connected to the front wheel frame 111. The linking component 330 is pivotally connected to the driving assembly 310 and the front tube body 510, and is configured to drive the front tube body 510 to rotate around the seventh pivot point A7, and to enable the front tube body 510 to rotate relative to the rear tube body 520 around the fifth rotation point B5, thereby allowing the rear wheel frame 112 to pivot relative to the front wheel frame 111.

[0169] Referring again to FIGS. 26 to 29, in an embodiment, the first driving section 3111 and the second driving section 3112 of the driving assembly 310 are arranged at an angle to each other. The opening of the first angle al between the first driving section 3111 and the second driving section 3112 faces upwards in the first direction F 1.

[0170] Specifically, the first angle al between the first driving section 3111 and the second driving section 3112 is an obtuse angle. When the frame body 100 is in the unfolded state, the opening of the first angle al is set obliquely upwards in the first direction Fl. In another alternative embodiment, the first angle al between the first driving section 3111 and the second driving section 3112 may be a right angle or an acute angle, which may be set specifically according to actual needs. When the handle frame 120 is folded, that is, when the first handle frame 121 is rotated relative to the second handle frame 122 around the second pivot base 123 and folded, the push part 1211 may push the first driving section 3111 of the driving assembly 310 to rotate downwards around the second rotation point B2, and the second driving section 3112 may rotate upwards around the second rotation point B2. Since the opening of the first angle al between the first driving section 3111 and the second driving section 3112 faces upwards in the first direction Fl, the second driving section 3112, when moving upwards, can more easily drive the linking component 330 to move upwards, so that the pivot point C2 and the fifth rotation point B5 can also be moved upwards more easily. In other words, the first driving section 3111 and the second driving section 3112 are arranged at an angle to each other, and the opening of the first angle al between the first driving section 3111 and the second driving section 3112 faces upwards, which is convenient for the folding of the basket rod assembly 500 (specifically, the front tube body 510 and the rear tube body 520). When the frame body 100 is folded, the driving assembly 311, when rotating in the clockwise direction W2, can more easily drive the fifth rotation point B5 to move upwards, so that the basket assembly 200 may be more easily movedupwards and then folded, and thus the rear tube body 520 may further approach the rear wheel frame 112, avoiding interference with the seat assembly 200 as mentioned below during folding, and avoiding compromising the reliability of the folding of the entire frame body 100.

[0171] Referring to FIGS. 26 to 29, in an 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 (for example, a seesaw structure) with respect to the second rotation point B2. Since the first driving section 3111 has a longer lever arm, the basket rod assembly 500 may be folded more easily and labor-savingly by operating the first driving section 3111.

[0172] Referring to FIGS. 27, 29 and 31, in an embodiment, the driving assembly 310 is provided with a stopper 317. When the basket rod assembly 500 is in the unfolded state, the stopper 317 is configured to abut against the linking component 330 to restrict the linking component 330 from pivoting in the clockwise direction W2 relative to the driving assembly 310 (e.g., around the pivot point Cl), so that the rear tube body 520 is not movable relative to the driving assembly 310, thereby keeping the basket rod assembly 500 in the unfolded state. Specifically, the stopper 317 is disposed at an end of the driving assembly 310 adjacent to the pivot point Cl between the linking component 330 and the rear tube body 520, that is, disposed on the second driving section 3112, and is located between the fifth rotation point B5 and the eighth pivot point A8, on the side of the driving assembly 310 relatively close to the handle frame 120. More specifically, as shown in FIG. 27, when the basket rod assembly 500 is in the unfolded state, the stopper 317 is located on the upper left side of the linking component 330, so that the linking component 330 may be prevented from continuing to rotate around the pivot point Cl in the clockwise direction W2. As such, the linking component 330 abuts against the stopper 317 and remains stationary, thereby enabling the linking component 330 and the rear tube body 520 to remain relatively stationary, and enabling the rear tube body 520 to remain stationary relative to the front tube body 510, the rear wheel frame 112, etc., so that the frame body 100 may be stably maintained in the unfolded state. In addition, when the basket rod assembly 500 is switched from the unfolded state to the folded state, the stopper 317 can also prevent the user from making misoperations or the like. Specifically, when the user needs to fold the basket rod assembly 500, the driving assembly 310 may be rotated around the second rotation point B2 in the clockwise direction W2, that is, the first driving section 3111 of the driving assembly 310 may be pushed downwards. Therefore, with the configuration of the stopper 317, the stopper 317 can abut againstthe linking component 330, so that the user can only push the first driving section 3111 of the driving assembly 310 downwards, and the user is prevented from pushing the first driving section 3111 of the driving assembly 310 upwards. More specifically, when the frame body 100 is in the folded state, the basket rod assembly 500 is in the folded state. In this case, the stopper 317 is located on the right side of the linking component 330 and abuts against the linking component 330. In this way, the linking component 330 may be restricted from continuing to rotate in the counterclockwise direction W1 around the pivot point Cl, so that the basket rod assembly 500 may be stably maintained in the folded state. Similarly, when the basket rod assembly 500 is switched from the folded state to the unfolded state, the stopper 317 can also prevent the user from making misoperations or the like. Specifically, when the user needs to unfold the basket rod assembly 500, the driving assembly 310 may be rotated in the counterclockwise direction W1 around the second rotation point B2, that is, the first driving section 3111 of the driving assembly 310 is pushed upwards. Therefore, when the stopper 317 is located on the right side of the linking component 330 and abuts against the linking component 330, the user can only push the first driving section 3111 of the driving assembly 310 upwards, and the user is prevented from pushing the first driving section 3111 of the driving assembly 310 downwards.

[0173] Referring to FIGS. 21 and 23, in an embodiment, the stroller 1000 further includes a seat assembly 200. The seat assembly 200 may be directly used as a seat cushion, and the child can directly sit on the seat assembly 200. In another alternative embodiment, the seat assembly 200 may be used as a support member for supporting a carrier, and the child is supported on the seat assembly 200 by the carrier. Still referring 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 base 130 and the driving assembly 310. The seat assembly 200 and the first pivot base 130 are pivotally connected to each other at a second pivot point A2, or can pivot around the second pivot axis A2. The seat assembly 200 and the driving assembly 310 are pivotally connected to each other at a seventh rotation point B7, or can pivot around a seventh rotation axis B7. The seventh rotation point B7 is located on the side of the second rotation point B2 away from the linking component 330. In this way, when the frame body 100 is switched 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 base 130. At the same time, the driving assembly 310 drives the linking component 330 to rotate, thereby driving the basket rod assembly 500 to fold, thereby achieving the synchronous folding of the seat assembly 200 and the basket rod assembly 500 (see FIGS. 29 and 31).

[0174] The seat assembly 200 is roughly parallel to the rear tube body 520, and the second pivot axis A2 and the seventh rotation axis B7 are both roughly parallel to the fourth pivot axis A4. In this way, during the process of the frame body 100 switching from the unfolded state to the folded state, the seat assembly 200 and the basket rod assembly 500 (specifically, the rear tube body 520) can also be roughly parallel to each other, which can avoid interference between the seat assembly 200 and the basket rod assembly 500.

[0175] Referring to FIGS. 22 and 23, in an embodiment, the seat assembly 200 includes, for example, a seat plate 212, a seat tube assembly 230, and a support bar 240. The seat tube assembly 230 is pivotally connected between the first pivot base 130 and the driving assembly 310. The seat plate 212 is mounted on the seat tube assembly 230 for supporting a carrier or directly supporting a child. Specifically, the seat plate 212 is detachably mounted on the seat tube assembly 230, for example, by means of a snap-fit connection, a screw connection, etc. In another alternative embodiment, the seat plate 212 is fixedly mounted on the seat tube assembly 230. Still referring to FIG. 23, the support bar 240 is disposed on the seat tube assembly 230 and is located on the side of the seat plate 212 facing the basket rod assembly 500. In some other unillustrated embodiments, the support bar 240 of the seat assembly 200 may be omitted, and which is not limited herein.

[0176] Referring to FIGS. 23 and 25, in an embodiment, the seat tube assembly 230 has, for example, a U-shaped structure, which includes a first seat tube 231 located on the left and right sides and a second seat tube 232 connected between the two first seat tubes 231. The second seat tube 232 extends in the second direction F2. Each of the two first seat tubes 231 is pivotally connected to the corresponding first pivot base 130 on the same side. The support bar 240 is connected between the two first seat tubes 231. The support bar 240 generally extends in the second direction F2. In this way, the seat tube assembly 230 may be mounted on the frame body 100 with greater stability, which is beneficial to improve the stability of the seat assembly 200 in supporting the carrier or the child. In some other unillustrated embodiments, the second seat tube 232 of the seat tube assembly 230 may be omitted, and which is not limited herein.

[0177] The working principle of the folding mechanism 300 is described below with reference to FIGS. 26 to 31.

[0178] Referring to FIGS. 26 and 27, when the frame body 100 is in the unfolded state, since the locking mechanism 124 is in the locked state, the first handle frame 121 and the second handle frame 122 remain fixed relative to each other, that is, the push part 1211 also remains relatively fixed. Sincethe second handle frame 122, the push part 1211, the driving assembly 310 and the rear wheel frame 112 constitute the four-link structure, when the first handle frame 121 and the second handle frame 122 are locked, the fourth rotation point B4 and the second rotation point B2 remain fixed and are not movable, so that the second handle frame 122, the driving assembly 310 and the rear wheel frame 112 remain fixed relative to one another and are not rotatable relative to one another, and finally the frame body 100 may be stably maintained in the unfolded state. In this case, since the seat tube assembly 230, the rear wheel frame 112 and the driving assembly 310 can form a roughly triangle structure, when the rear wheel frame 112 and the driving assembly 310 are both kept fixed, the seat assembly 200 may be kept in the unfolded state and always located above the basket rod assembly 500. In addition, when the frame body 100 is in the unfolded state, the basket rod assembly 500 is in the unfolded state. At this time, the front wheel frame 111 and the rear wheel frame 112 are arranged at an angle to each other, at least a portion of the basket rod assembly 500 is located between the front wheel frame 111 and the rear wheel frame 112, and the front tube body 510 and the rear tube body 520 are roughly in the same plane. In this way, the front wheel frame 111, the rear wheel frame 112 and the basket rod assembly 500 may form a triangular structure as a whole, so that the front wheel frame 111, the rear wheel frame 112 and the basket rod assembly 500 may be kept fixed relative to each other, so that the frame body 100 may be stably maintained in the unfolded state.

[0179] 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 unlocking mechanism 125 is pressed to switch the locking mechanism 124 to the unlocked state. Then, the first handle frame 121 is rotated in the counterclockwise direction W1 around the second pivot base 123 (or around the fifth pivot point A5) and folded relative to the second handle frame 122. During this rotation process, the push part 1211 of the first handle frame 121 pushes the driving assembly 310 downwards, so that the driving assembly 310 rotates in the clockwise direction W2 around the second rotation point B2. In this case, the first driving section 3111 of the driving assembly 310 rotates downwards around the second rotation point B2; the second driving section 3112 of the driving assembly 310 rotates upwards around the second rotation point B2; the linking component 330 connected to the first driving section 3111 moves upwards as a whole; and the pivot point Cl between the linking component 330 and the rear tube body 520 also moves upwards. As such, the rear tube body 520 pivots around the eight pivot point A8 in the clockwise direction W2, thereby causing the fifth rotation point B5 between the rear tube body 520 and the front tube body 510 to move upwards,so that the front tube body 510 can be driven to rotate around the seventh pivot point A7 in the counterclockwise direction Wl, thereby switching the basket rod assembly 500 from the unfolded state to the folded state. The distance between the seventh pivot point A7 and the eighth pivot point A8 is reduced, and finally the front wheel frame 111 and the rear wheel frame 112 approach each other, so that the frame body 100 may be folded. During this process, an end of the linking component 330 may rotate relative to the driving assembly 310 around the pivot point Cl in the counterclockwise direction Wl, and another end of the linking component 330 may rotate relative to the rear tube body 520 around the pivot point C2 in the counterclockwise direction Wl, to adjust the angle and spacing between the driving assembly 310 and the rear tube body 520, thereby providing a degree of freedom of movement for the relative movement between the driving assembly 310 and the rear tube body 520, which can allow the driving assembly 310, when rotating, to drive the rear tube body 520 to pivot. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot base 130, during the process of the driving assembly 310 rotating around the second rotation point B2 in the clockwise direction W2, the seat assembly 200 is driven to rotate relative to the first pivot base 130 in the clockwise direction W2, thereby achieving synchronous folding of the seat assembly 200 and the basket rod assembly 500.

[0180] 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 unlocking mechanism 125, and the first handle frame 121 may be rotated around the second pivot base 123 (or around the fifth pivot point A5) in the counterclockwise direction Wl and unfolded relative to the second handle frame 122. During this rotation process, the push part 1211 of the first handle frame 121 pushes the driving assembly 310 upwards, so that the driving assembly 310 rotates around the second rotation point B2 in the counterclockwise direction Wl. In this case, the second driving section 3112 of the driving assembly 310 rotates downwards around the second rotation point B2, thereby pushing the linking component 330 to move downwards as a whole, and then the pivot point C2 between the linking component 330 and the rear tube body 520 may be pushed to move downwards. As a result, the rear tube body 520 rotates in the counterclockwise direction W 1 around the eighth pivot point A8, and the fifth pivot point B5 between the front tube body 510 and the rear tube body 520 moves downwards, thereby driving the front tube body 510 to rotate in the clockwise direction W2, so that the front tube body 510 and the rear tube body 520 are extended relative to each other, and the distance between the seventh pivot point A7 and the eighth pivot point A8 increases. Finally, the front wheel frame 111 and the rear wheel frame 112are pushed away from each other, so that the frame body 100 may be unfolded. In this process, one end of the linking component 330 pivots in the clockwise direction W2 around the pivot point Cl, and the other end of the linking component 330 pivots in the clockwise direction W2 around the pivot point C2, so as to adjust the angle and spacing between the driving assembly 310 and the rear tube body 520, which can allow the driving assembly 310, when rotating, to drive the rear tube body 520 to pivot. Since the seat assembly 200 is pivotally connected to the driving assembly 310 and the first pivot base 130, when the driving assembly 310 rotates in the counterclockwise direction W1 around the second rotation point B2, the seat assembly 200 is driven to rotate in the counterclockwise direction W1 relative to the first pivot base 130, thereby achieving synchronous unfolding of the seat assembly 200 and the basket rod assembly 500.

[0181] Referring to FIGS. 35 to 38, in an embodiment, the stroller 1000 further includes an auxiliary folding member 600. The auxiliary folding member 600 is, for example, a folding webbing. The support bar 240 and the seat plate 212 are spaced apart, and a through passage 250 is formed between the support bar 240 and the seat plate 212. The auxiliary folding member 600 is connected to the basket rod assembly 500 and extends through the through passage 250. During the folding process of the frame body 100, the auxiliary folding member 600 is operated to drive the basket rod assembly 500 to switch from the unfolded state to the folded state. When the frame body 100 is in the unfolded state, the auxiliary folding member 600 is located below the seat plate 212, thus preventing the auxiliary folding member 600 from being exposed and compromising the aesthetics of the stroller. In addition, the auxiliary folding member 600 is supported on the support bar 240. When not in use, the auxiliary folding member 600 is stored and placed on the support bar 240, which can prevent the auxiliary folding member 600 from falling down to the ground and from interfering with the rear wheel 622 when pushing the stroller 1000 to moving.

[0182] In this embodiment, as shown in FIGS. 25, 26, 36 and 37, the folding webbing is connected to the rear tube body 520. The connection point between the folding webbing and the rear tube body 520 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 upwards in the first direction Fl, so that the folding webbing can applies an upwards force to the end of the rear tube body 520 adjacent to the front tube body 510, and then the rear tube body 520 can be rotated 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, the smoothness of the folding of the frame body 100 can be improved.More specifically, the folding webbing is connected to the pivot point C2 between the connecting member and the rear tube body 520.

[0183] In another alternative illustrated embodiment, the folding webbing may be connected to the front tube body 510, and the connection point between the folding webbing and the front tube body 510 is located at the end of the front tube body 510 adjacent to the fifth rotation point B5. In this way, the front tube body 510 may be driven to rotate counterclockwise around the seventh pivot point A7 by pulling the folding webbing upwards, thereby driving the basket rod assembly 500 and the frame body 100 to fold quickly. In addition, in another alternative embodiment, the folding webbing may also be directly connected to the fifth rotation point B5, or may also be connected to the second driving section 3112 of the driving assembly 310, and which is not limited herein.

[0184] According to the above description, in the stroller 1000 of the present application, each of the wheel frame 110 and the handle frame 120 may be folded, and the wheel frame 110 as a whole may be folded relative to the handle frame 120, so the frame body 100 may switch freely between the unfolded state and the folded state. Since the basket rod assembly 500 is pivotally connected on the wheel frame 110 and has the unfolded state and the folded state, and the driving assembly 310 is pivotally connected between the handle frame 120 and the wheel frame 110 and is movably connected to the basket rod assembly 500 through the linking component 330, so when folding the stroller 1000 of the present application, the driving assembly 310 may be directly moved / rotated relative to the frame body 100 as a whole by folding the frame body 100, and the linking component 330 may be driven to pivot, thereby driving the basket rod assembly 500 to rotate, so that the basket rod assembly 500 may be switched from the unfolded state to the folded state. In this way, not only the convenience of folding the stroller 1000 may be improved, but also the smoothness of folding the stroller 1000 may be improved. In addition, 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 body 520 of the basket rod assembly 500, and the driving assembly 310 and the linking component 330 are further configured (specifically, the driving assembly 310 is pivotally connected between the rear wheel frame 112 and the handle frame 120, and the linking component 330 is pivotally connected to the second driving section 3112 of the driving assembly 310 adjacent to the fifth rotation point B5), when the frame body 100 is folded, the driving assembly 310 drives the basket rod assembly 500 to turn and be fold, that is, the front tube body 510 and the rear tube body 520 are folded relative to each other, which enables the basket rod assembly 500 to befolded more smoothly and approach the rear wheel frame 112. At the same time, the driving assembly 310 can also drive the seat assembly 200 to pivot and fold synchronously, so that the seat assembly 200 always remains roughly parallel to the rear tube body 520. The basket assembly 200, even with a large volume, may be folded smoothly and quickly. Moreover, the basket rod assembly 500 may be prevented from interfering with the seat assembly 200 during the folding process, thereby ensuring the smoothness and reliability of the overall folding of the stroller 1000.

[0185] 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.

[0186] In the stroller according to the present application, since the wheel frame and the handle frame may be folded relative to each other so that the frame body have the unfolded state and the folded state, the basket rod assembly is pivotally connected to the wheel frame and has the unfolded state and the folded state, and the driving assembly is pivotally connected between the handle frame and the wheel frame and is movably connected to the basket rod assembly through the linking component. As such, when the stroller is folded, the driving assembly drives the linking component to pivot directly by folding the frame body, thereby driving the basket rod assembly to switch from the unfolded state to the folded state. In this way, not only the convenience of folding the stroller may be improved, but also the smoothness of folding the stroller may be improved.

[0187] The technical features of the above-mentioned embodiments may be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the present application.

[0188] The above-described embodiments only illustrate several implementations of the present application, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present application. It should be understood by those of ordinary skill in the art that various modifications and improvements may be made without departing from the concept of the present application, and all fall within the protection scope of the present application. Therefore, the patent protection of the present application shall be defined by the appended claims.

Claims

CLAIMS1. A stroller, comprising: a frame body comprising 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 comprising a seat part and a backrest part, wherein the seat part and the backrest part are pivotally connected to each other at a first pivot point, and the seat part is pivotally connected to the frame body at a second pivot point; and a folding mechanism comprising a driving assembly and a linkage member, wherein the driving assembly is pivotally connected between the handle frame and the wheel frame, and the linkage member is pivotally connected to the driving assembly and the seat part respectively; wherein 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.

2. The baby stroller according to claim 1, wherein the wheel frame comprises a front wheel frame and a rear wheel frame that are pivotally connected to each other; the driving assembly comprises a driving member and a rotating member; wherein the driving member is pivotally connected between the handle frame and the rear wheel frame, an end of the rotating member is pivotally connected to the front wheel frame, and another end of the rotating member is pivotally connected to the driving member at a first rotation point; a first end of the linkage member is pivotally connected to the seat part, and a second end of the linkage member is pivotally connected to the driving member or the rotating member; when the frame body is in the unfolded state, the first rotation point is located between the front wheel frame and the rear wheel frame; and when the frame body is switched from the unfolded state to the folded state, the driving member pivots relative to the rear wheel frame or the handle frame, and drives the linkage member to move upwards in a first direction, so that the first pivot point of the seat part rotates upwards around the second pivot point in the first rotating direction.

3. The baby stroller according to claim 2, wherein the driving assembly further comprises a transmission member disposed on the driving member or the rotating member, and the second end of the linkage member is pivotally connected to the transmission member;when the frame body is in the unfolded state, the transmission member is located between the front wheel frame and the rear wheel frame.

4. The baby 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 disposed on a side of the driving member or the rotating member facing away from the seat assembly.

5. The stroller according to claim 1, wherein the driving assembly comprises: a driving member pivotally connected between the handle frame and the wheel frame; and a transmission member disposed on the driving member, wherein a second end of the linkage member is pivotally connected to the transmission member, and a first end of the linkage member is pivotally connected to the seat part; and when the frame body is switched 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 upwards in a first direction, so that the first pivot point of the seat part rotates upwards around the second pivot point in the first rotating direction.

6. The stroller according to any one of claims 3 to 5, wherein the transmission member is disposed on the driving member; and the driving member comprises: a first driving section pivotally connected to the handle frame; and a second driving section pivotally connected to a rear wheel frame of the wheel frame at a second rotation point, wherein the second driving section is pivotally connected to a rotating member at a first rotation point, and the transmission member is disposed on the second driving section; and optionally wherein the transmission member is integrally formed on the driving member.

7. The stroller according to claim 6, wherein a first angle is formed between the first driving section and the second driving section; at least when the frame body is in the unfolded state, an opening of the first angle faces upwards in a first direction; and at least a portion of the transmission member is located on a side of the second driving section away from the opening of the first angle; and / orthe transmission member comprises a first segment and a second segment that are connected to each other; a second angle is formed between the first segment and the second segment; the first segment is stacked on the driving member and is located between the first rotation point and the second rotation point; and the second segment is pivotally connected to the linkage member; and at least when the frame body is in the unfolded state, an opening of the second angle faces downwards in the first direction.

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

9. The stroller according to any one of the preceding claims, wherein the handle frame comprises a first handle frame, a second handle frame and a second pivot base; wherein the second pivot base has a fifth pivot point; the second handle frame is pivotally connected to the wheel frame and pivotally connected to the first handle frame at the fifth pivot point via the second pivot base; and the driving assembly is pivotally connected between the first handle frame and the wheel frame.

10. The stroller according to claim 9, wherein the handle frame further comprises: a locking mechanism disposed in the second pivot base, the locking mechanism having a locked state in which relative rotation between the first handle frame and the second handle frame is restricted, and an unlocked state in which the relative rotation between the first handle frame and the second handle frame is allowed; and an unlocking mechanism disposed on the handle frame and operably connected to the locking mechanism to allow the locking mechanism to switch between the locked state and the unlocked state.

11. The stroller according to claim 10, wherein the second pivot base comprises a fixing base body and a pivot base body that are capable of pivoting around the fifth pivot point; wherein one of the fixing base body and the pivot base body is connected to the first handle frame, and another of the fixing base body and the pivot base body is connected to the second handle frame; the locking mechanism comprises: a locking member movably disposed on one of the fixing base body and the pivot base body; and a locking recess formed on another of the pivot base body and the fixing base body;wherein when the locking mechanism is in the locked state, the locking member is inserted into the locking recess, and when the locking mechanism is in the unlocked state, the locking member is withdrawn from the locking recess; and optionally wherein the unlocking mechanism comprises: 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, wherein the first operating member has a first locked position and a first unlocked position, and when the first operating member moves from the first locked position to the first unlocked position, the first operating member drives the driving wheel to rotate, and the driving wheel drives the locking mechanism to switch from the locked state to the unlocked state through the pulling member; and more optionally wherein the unlocking mechanism further comprises: a second operating member pivotally connected to the handle frame and having a locking part and an operable operating part, the second operating member being pivotable between a second locked position and a second unlocked position, wherein when the second operating member is in the second locked position, the locking part is located on a moving path of the first operating member to restrict the first operating member from moving, and when the second operating member is in the first unlocked position, the locking part deviates from the moving path of the first operating member to allow the first operating member to move.

12. The stroller according to any one of claims 9 to 11, wherein the driving assembly and the wheel frame are pivotally connected to each other at a second rotation point; the first handle frame has a push part at an end adjacent to the second handle frame; the driving assembly is pivotally connected between the push part and the wheel frame, and pivotally connected to the push part at a fourth rotation point; and the fourth rotation point, the second rotation point, the fourth pivot point and the fifth pivot point are connected to form a four-link structure, and the frame body is switchable between the unfolded state and the folded state through the four-link structure.

13. A stroIler, comprising: a frame body comprising 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 basket rod assembly pivotally connected to the wheel frame and having an unfolded state and a folded state; and a folding mechanism comprising a driving assembly and a linking component, wherein the driving assembly is pivotally connected between the handle frame and the wheel frame, and is movably connected to the basket rod assembly through the linking component; and when the frame body is switched between the unfolded state and the folded state, the driving assembly pivots relative to the wheel frame or the handle frame and drives the basket rod assembly to switch between the unfolded state and the folded state through the linking component.

14. The stroller according to claim 13, wherein the wheel frame comprises a front wheel frame and a rear wheel frame pivotally connected to the front wheel frame; the basket rod assembly comprises: a front tube body pivotally connected to the front wheel frame at a seventh pivot point and pivotally connected to the rear tube body at a fifth rotation point; and a rear tube body pivotally connected to the rear wheel frame at an eighth pivot point, wherein the driving assembly is pivotally connected between the rear wheel frame and the handle frame, and is movably connected to the rear tube body through the linking component; or wherein the driving assembly is pivotally connected between the front wheel frame and the handle frame, and is movably connected to the front tube body through the linking component.

15. The stroller according to claim 14, wherein the front tube body comprises a first tube section and a second tube section that are arranged at an angle to each other, and wherein an end of the first tube section away from the second tube section is pivotally connected to the front wheel frame at the seventh pivot point, an end of the second tube section away from the first tube section is pivotally connected to the rear tube body at the fifth rotation point, and an opening of an angle between the first tube section and the second tube section faces downwards in a first direction.

16. The stroller according to claim 14 or 15, wherein the driving assembly is pivotally connected to the rear wheel frame at a second rotation point, and the linking component is pivotally connectedto the rear tube body and the driving assembly respectively; and when the driving assembly pivots around the second rotation point, the driving assembly drives the linking component to move as a whole relative to the frame body and rotate relative to the driving assembly, to allow the rear tube body to rotate around the eighth pivot point and allow the front tube body to rotate around the seventh pivot point.

17. The stroller according to claim 16, wherein the driving assembly comprises: a first driving section pivotally connected to the handle frame; and a second driving section pivotally connected to the linking component, wherein the second rotation point is located between the first driving section and the second driving section; and optionally wherein the first driving section and the second driving section are arranged at an angle to each other; and an opening of an angle between the first driving section and the second driving section faces upwards in a first direction.

18. The stroller according to any one of claims 13 to 17, wherein the driving assembly is provided with a stopper, and wherein when the basket rod assembly is in the unfolded state, the stopper is configured to abut against the linking component to restrict the linking component from pivoting relative to the driving assembly, so that the basket rod assembly is maintained in the unfolded state; and optionally wherein the driving assembly is pivotally connected to the wheel frame at a second rotation point; and the stopper is disposed on a second driving section of the driving assembly adjacent to the linking component and is located at a side of the driving assembly adjacent to the handle frame.

19. The stroller according to any one of claims 13 to 18, further comprising an auxiliary folding member connected to the basket rod assembly, wherein the auxiliary folding member is configured to, when being operated, to drive the basket rod assembly to switch to the folded state.

20. The stroller according to any one of claims 13 to 19, further comprising: a first pivot base, the wheel frame and the handle frame being coaxially pivoted at a fourth pivot point via the first pivot base; and a seat assembly pivotally connected to the first pivot base and the driving assembly respectively;wherein when the frame body is switched from the unfolded state to the folded state, the driving assembly drives the seat assembly to rotate relative to the first pivot base to avoid interference with a folding process of the basket rod assembly.

Images