Stroller

Abstract

The present application relates to a stroller, comprising a handle frame, a second locking mechanism, a drift locking mechanism, wheel seats, a wheel frame, and an unlocking operation mechanism, wherein the handle frame comprises an upper handle frame, a lower handle frame and a first locking mechanism; the upper handle frame and the lower handle frame are pivotally connected to each other, and are restricted from pivoting or allowed to pivot by means of the first locking mechanism; the wheel seats are rotationally connected to wheels; the lower handle frame and the wheel frame are pivotally connected to each other, and are restricted from pivoting or allowed to pivot by means of the second locking mechanism; the wheel frame is configured to rotationally connect to the wheel seat, and the wheel seats rotating relative to the wheel frame is restricted or allowed by means of the drift locking mechanism; and the unlocking operation mechanism has a first unlocked state and a second unlocked state, when in the first unlocked state, the unlocking operation mechanism unlocking the first locking mechanism and / or the second locking mechanism to allow the upper handle frame to pivot relative to the lower handle frame and also to allow the lower handle frame to pivot relative to the wheel frame, and when in the second unlocked state, the unlocking operation mechanism unlocking the drift locking mechanism to allow the wheel seats to rotate relative to the wheel frame.

Description

stroller Technical Field

[0001] This application relates to the field of wheeled mobility devices, and in particular to a trolley. Background Technology

[0002] Strollers are an essential tool for parents taking infants and toddlers out, requiring not only safety and comfort but also ease of carrying and storage. Strollers with rear-wheel drift steering are particularly popular due to their maneuverability and smooth pushing experience. These strollers allow for rear-wheel drift steering via a drift control unit on the handlebars, enabling easy maneuvering even in confined spaces.

[0003] Currently, most drift control units are mounted on the frame and connected to the drift locking mechanism via a transmission mechanism (such as a steel cable) for control. However, mounting the drift control unit on the frame makes it difficult to fold the frame and results in a large overall folded frame volume. Furthermore, while some frames can fold, they often suffer from short lifespans of the transmission mechanism, inability to mount the drift control unit on the frame, and inconvenient operation. Typically, to reduce the overall folded size of the cart, the frame itself needs to be further designed to fold. This places higher demands on the overall structure of the cart, especially the internal space design of the pivot joints, but current designs often fail to meet these requirements. Summary of the Invention

[0004] Therefore, it is necessary to provide a trolley with a reasonable structural design to address the above problems.

[0005] This application provides a trolley, comprising: a handlebar, including an upper handlebar, a lower handlebar, and a first locking mechanism, wherein the upper handlebar is pivotally connected to the lower handlebar and the first locking mechanism restricts or allows relative pivoting between the two; a wheel seat; a wheel frame; and a drift locking mechanism for restricting or allowing rotation of the wheel seat relative to the wheel frame, the drift locking mechanism having a drift traction member disposed within the wheel frame and the handlebar and passing through the first locking mechanism.

[0006] In one embodiment, the first locking mechanism includes: a first connecting seat connected to the upper frame; and a second connecting seat connected to the lower frame and pivotally connected to the first connecting seat, wherein a passage space is formed between the second connecting seat and the first connecting seat, and the drift traction member passes through the passage space.

[0007] In one embodiment, the first connecting seat includes a first pivot portion and a first connecting portion connected to each other, the first connecting portion connecting to the upper frame, and the second connecting seat includes a second pivot portion and a second connecting portion connected to each other, the second connecting portion connecting to the lower frame. Both the first pivot portion and the second pivot portion include two pieces disposed opposite to each other. The two pieces of the first pivot portion and the two pieces of the second pivot portion are arranged alternately and pivotally connected, and the through space can be formed between any two adjacent pieces.

[0008] In one embodiment, at least one of the two adjacent sheets is provided with a recess, the recess forming the through space.

[0009] In one embodiment, the sheet body has a guide portion protruding from one side facing the passage space, and the guide portion is adapted to guide the drift traction member to bend when the first connecting seat pivots relative to the second connecting seat.

[0010] In one embodiment, the first connecting seat includes a first pivot portion and a first connecting portion connected to each other, the first connecting portion connecting to the upper frame; the second connecting seat includes a second pivot portion and a second connecting portion connected to each other, the second connecting portion connecting to the lower frame; one of the first pivot portion and the second pivot portion includes two oppositely arranged plates, the other of the first pivot portion and the second pivot portion is pivotally connected between the two plates, and a through space can be formed between the first pivot portion and either of the plates.

[0011] In one embodiment, the first locking mechanism includes: a first connecting seat connected to the upper frame; a second connecting seat connected to the lower frame and pivotally connected to the first connecting seat; and a cover connected to the first connecting seat or the second connecting seat, wherein the cover and the first connecting seat or the second connecting seat form a passage space, and the drift traction member passes through the passage space.

[0012] In one embodiment, the first connecting seat includes a first pivot portion and a first connecting portion connected to each other. The first connecting portion connects to the upper frame and includes two pieces disposed opposite to each other. The second connecting seat includes a second pivot portion and a second connecting portion connected to each other. The second connecting portion connects to the lower frame and is pivotally connected between the two pieces. The cover is connected to the side of any piece facing away from the second pivot portion, and the through space is formed between the cover and the adjacent piece.

[0013] In one embodiment, the first locking mechanism further includes a first drive member that passes through the second connecting seat and the first connecting seat and is fixedly connected to the first connecting seat, and the first drive member protrudes within the passage space. The first drive member has an arcuate peripheral wall that is adapted to guide the drift traction member to bend when the first connecting seat pivots relative to the second connecting seat.

[0014] In one embodiment, the first connecting seat is provided with a first through-channel, which connects the inner cavity of the upper frame and the through-space; the second connecting seat is provided with a second through-channel, which connects the inner cavity of the lower frame and the through-space; one end of the drift traction member passes through the through-space, through the first through-channel, and extends into the inner cavity of the upper frame, and the other end of the drift traction member passes through the through-space, through the second through-channel, and extends into the inner cavity of the lower frame.

[0015] In one embodiment, the first locking mechanism further includes: a first locking member movably disposed on one of the first connecting seat and the second connecting seat; and a locking recess disposed on the other of the first connecting seat and the second connecting seat, the first locking member being adapted to lock into the locking recess to restrict pivoting of the first connecting seat relative to the second connecting seat.

[0016] In one embodiment, the first locking mechanism further includes a first traction member connected to the first locking member; the trolley further includes a release mechanism drivenly connected to the first traction member. When the release mechanism is operated, the first traction member drives the first locking member to retract from the locking recess to release it from the locking recess, thereby allowing the first connecting seat to pivot relative to the second connecting seat.

[0017] In one embodiment, the first locking mechanism includes: a first connecting seat having a first through-channel and connected to the upper frame; a second connecting seat having a second through-channel and connected to the lower frame; wherein the second connecting seat is pivotally connected to the first connecting seat, the first through-channel is connected to the second through-channel, and the drift traction member is inserted in the first through-channel and the second through-channel.

[0018] In one embodiment, the first connecting seat includes a first pivot portion and a first connecting portion connected together, the first connecting portion having a first through-channel and connected to the upper frame, the extending direction of the first through-channel being tangent to the outer peripheral wall of the first pivot portion; and / or the second connecting seat includes a second pivot portion and a second connecting portion connected together, the second connecting portion having a second through-channel and connected to the lower frame, the extending direction of the second through-channel being tangent to the outer peripheral wall of the second pivot portion.

[0019] In one embodiment, the first connecting seat includes a first pivot portion, and the second connecting seat includes a second pivot portion. The first pivot portion and the second pivot portion are pivotally connected at a first pivot point. When the first connecting seat pivots relative to the second connecting seat about the first pivot point, the drifting traction member can bend around the first pivot point along the outer peripheral wall of the first pivot portion or the outer peripheral wall of the second pivot portion.

[0020] In one embodiment, the first locking mechanism further includes a cover connected to the first connecting seat or the second connecting seat, and the drift traction member is disposed between the cover and the first connecting seat or the cover and the second connecting seat.

[0021] In one embodiment, the first connecting seat or the second connecting seat is provided with a guide portion protruding toward the side of the cover body. When the first connecting seat pivots relative to the second connecting seat, the guide portion is adapted to guide the drifting traction member to bend.

[0022] In one embodiment, the cover has a guide portion protruding on the side facing the first connecting seat or the second connecting seat, and the guide portion is adapted to guide the drift traction member to bend when the first connecting seat pivots relative to the second connecting seat.

[0023] In one embodiment, the first connecting seat has a first chamber on the side facing the second connecting seat, and the side wall of the first chamber has a first locking groove. The second connecting seat has a second chamber on the side facing the first connecting seat, and the side wall of the second chamber has a second locking groove. The first locking mechanism further includes a first locking member with locking teeth. The first locking member is movably disposed between the first chamber and the second chamber along a first axial direction and has a first locking position and a first unlocking position. When in the first locking position, the locking teeth simultaneously engage the first locking groove and the second locking groove to restrict the first connecting seat from pivoting relative to the second connecting seat. When in the first unlocking position, the locking teeth disengage from the first locking groove or the second locking groove to allow the first connecting seat to pivot relative to the second connecting seat.

[0024] In one embodiment, the wheel frame includes a front wheel frame, a rear wheel frame, and a second locking mechanism. The second locking mechanism includes a first pivot seat, a second pivot seat, and a third pivot seat pivotally connected to each other about a second axis. The second pivot seat is located between the first pivot seat and the third pivot seat along the second axis. The first pivot seat is connected to the lower handrail, the second pivot seat is connected to the front wheel frame, and the third pivot seat is connected to the rear wheel frame.

[0025] In one embodiment, the first pivot seat has a movable channel, through which the drift traction member passes and extends into the cavity of the rear wheel frame.

[0026] In one embodiment, the second locking mechanism further includes: a second locking member movably disposed between the first pivot seat and the third pivot seat along the second axis and having a second locking position and a second unlocking position; and a pushing member rotatably disposed between the first pivot seat and the third pivot seat along the second axis and adjacent to the second locking member, the pushing member being adapted to drive the second locking member to move from the second locking position to the second unlocking position; when in the second locking position, the first pivot seat and the third pivot seat are relatively fixed; when in the second unlocking position, the first pivot seat is pivotable relative to the third pivot seat.

[0027] In one embodiment, the first locking mechanism includes a first connecting seat and a second connecting seat pivotally connected to each other on a first pivot, the first pivot restricting the separation of the first connecting seat and the second connecting seat along a first axial direction, the first connecting seat being connected to the upper frame and the second connecting seat being connected to the lower frame.

[0028] In one embodiment, the first locking mechanism further includes a first driving member, which is fixedly connected to the first connecting seat and coaxially disposed with the first pivot; the second locking mechanism further includes a second traction member, which is connected between the push member and the first driving member or the push member and the first connecting seat. When the first connecting seat pivots relative to the second connecting seat, the second traction member drives the push member to rotate by rotating the first driving member or the first connecting seat around the first pivot.

[0029] In one embodiment, the drift locking mechanism further includes a drift locking member and a locking recess, the wheel seat is provided with the locking recess, the drift locking member is movably disposed on the wheel frame and adapted to engage with the locking recess to restrict the rotation of the wheel seat, and the drift traction member is connected to the drift locking member.

[0030] In one embodiment, the trolley further includes a release mechanism disposed on the upper frame and drivenly connected to the drift traction member. When the release mechanism is operated, it causes the drift locking member to retract from the locking recess to release from the locking recess, thereby allowing the wheel seat to rotate relative to the wheel frame.

[0031] This application also provides a trolley, comprising: a handlebar, including an upper handlebar, a lower handlebar, and a first locking mechanism, wherein the upper handlebar is pivotally connected to the lower handlebar and the first locking mechanism restricts or allows relative pivoting between the two; a second locking mechanism; a drift locking mechanism; a wheel seat rotatably connected to a wheel; a wheel frame, wherein the lower handlebar is pivotally connected to the wheel frame and the second locking mechanism restricts or allows relative pivoting between the two, the wheel frame being rotatably connected to the wheel seat and the drift locking mechanism restricts or allows rotation of the wheel seat relative to the wheel frame; and a release mechanism having a first release state and a second release state, wherein when in the first release state, the release mechanism releases the first locking mechanism and / or the second locking mechanism to allow the upper handlebar to pivot relative to the lower handlebar, and simultaneously allows the lower handlebar to pivot relative to the wheel frame; and when in the second release state, the release mechanism releases the drift locking mechanism to allow rotation of the wheel seat relative to the wheel frame.

[0032] In one embodiment, the release mechanism includes: a first release member rotatably mounted on the rider frame, the first release member being driven connected to the first locking mechanism to allow the upper rider frame to pivot relative to the lower rider frame; a second release member rotatably mounted on the rider frame, the second release member being driven connected to the drift locking mechanism to allow the wheel seat to rotate relative to the wheel frame; and an operating member movably mounted on the rider frame and selectively driving either the first release member or the second release member to rotate.

[0033] In one embodiment, the release mechanism further includes: a first linkage connected to the first release member; a second linkage connected to the second release member; and a toggle member connected to the first linkage member and the second linkage member respectively. The toggle member is movably disposed on the rider frame and can switch between a first position and a second position to drive the first linkage member and the second linkage member to move along a first direction.

[0034] In one embodiment, when the toggle member is in the first position, the operating member is operated to push the first linkage member to move in the second direction, thereby causing the first release member to rotate; when the toggle member is in the second position, the operating member is operated to push the second linkage member to move in the second direction, thereby causing the second release member to rotate; the first direction intersects the second direction.

[0035] In one embodiment, the first locking mechanism includes: a first connecting seat connected to the upper frame; a second connecting seat connected to the lower frame and pivotally connected to the first connecting seat; a first locking member movably disposed on one of the first and second connecting seats, the other of the first and second connecting seats having a locking recess, the first locking member being adapted to extend into the locking recess to restrict the first connecting seat from pivoting relative to the second connecting seat; and a first traction member connecting the first locking member and the first unlocking member; when the actuating member is in the first position and the operating member is operated, the first traction member drives the first locking member to retract from the locking recess to allow the first connecting seat to pivot relative to the second connecting seat.

[0036] In one embodiment, the first locking mechanism includes: a first connecting seat connected to the upper frame; a second connecting seat connected to the lower frame and pivotally connected to the first connecting seat; a first locking member movably disposed between the first connecting seat and the second connecting seat along a first axial direction to restrict or allow relative pivoting between them; a second driving member movably disposed between the first connecting seat and the second connecting seat and adjacent to the first locking member, the second driving member being adapted to drive the first locking member to move; and a first traction member connecting the second driving member and the first unlocking member; when the actuating member is in the first position and the operating member is operated, the first traction member drives the first locking member to unlock via the second driving member, thereby allowing the first connecting seat to pivot relative to the second connecting seat.

[0037] In one embodiment, the wheel frame includes a front wheel frame and a rear wheel frame; the second locking mechanism includes a second locking member and a first pivot seat, a second pivot seat, and a third pivot seat pivotally connected to each other about a second axis, wherein the second pivot seat is located between the first pivot seat and the third pivot seat along the second axis, the first pivot seat is connected to the dismount handframe, the second pivot seat is connected to the front wheel frame, the third pivot seat is connected to the rear wheel frame, and the second locking member is movably disposed between the first pivot seat and the third pivot seat along the second axis to restrict or allow relative pivoting between them.

[0038] In one embodiment, the second locking mechanism further includes: a pusher rotatably disposed between the first pivot and the third pivot and adjacent to the second locking member, the pusher being adapted to drive the second locking member to move to allow the first pivot and the third pivot to pivot relative to each other; and a second traction member connecting the pusher and the first pivot; when the first pivot is pivoted relative to the second pivot, the second traction member drives the pusher to rotate by rotating the first pivot, thereby driving the second locking member to move.

[0039] In one embodiment, the drift locking mechanism includes a drift locking member and a drift traction member. The drift locking member is movably disposed on the wheel frame and adapted to lock or release the wheel seat. The drift traction member is disposed within the wheel frame and the rider frame. The release operation mechanism is disposed on the upper rider frame. One end of the drift traction member passes through the first locking mechanism and is drivenly connected to the release operation mechanism, and the other end passes through the second locking mechanism and is connected to the drift locking member.

[0040] In one embodiment, the wheel seat is provided with a locking recess adapted to engage with the drift lock; when the release mechanism is operated, the release mechanism drives the drift lock to retract from the locking recess via the drift traction member.

[0041] In one embodiment, when the first locking mechanism is released, the upper handrail can pivot relative to the lower handrail to put the trolley in a folded state, and the wheels are on the same plane as the first locking mechanism and jointly support the trolley.

[0042] In the aforementioned trolley, the upper handlebar is pivotally connected to the lower handlebar via a first locking mechanism, and the lower handlebar is pivotally connected to the wheel frame via a second locking mechanism. Therefore, the user can release both the first and second locking mechanisms via a release mechanism, allowing the upper handlebar to fold relative to the lower handlebar, and the lower handlebar to fold relative to the wheel frame. This allows the trolley to fold in a three-fold manner, resulting in a smaller folded volume for easier storage and transport. Furthermore, the folded trolley can stand upright on the ground, supported by the wheels and the first locking mechanism, further reducing its footprint. Given the trolley's smaller folded volume, the release mechanism is located on the handlebar, facilitating user operation and improving ease of use. Since the release mechanism can also be connected to a drift locking mechanism, the user can control whether the wheels drift and steer by operating the release mechanism. Furthermore, because the drift traction component in the drift locking mechanism is cleverly positioned within the cavities of the rider frame and wheel frame, passing through both the first and second locking mechanisms, this fully utilizes the space of each pivot joint on the cart, protecting the drift traction component and extending its service life. It is important to emphasize that, in the aforementioned cart, although the drift traction component passes through the first and second locking mechanisms, the folding of the cart does not affect the drift locking mechanism, and therefore does not affect the cart's drift steering. Similarly, releasing the drift locking mechanism does not affect the cart's folding. In other words, the folding and drifting of the cart are independent processes that do not interfere with each other. That is, when the cart is folded, the state of the wheels (i.e., locked steering or allowed steering) is unaffected; similarly, releasing the wheel's drift steering does not affect the cart's state. Specifically, the user selectively controls whether the cart folds and drifts by operating the release mechanism. Attached Figure Description

[0043] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0046] Figure 1 is a perspective view of the trolley in the first embodiment of this application;

[0047] Figure 2 is a side view of the trolley shown in Figure 1, with the trolley in an unfolded state;

[0048] Figure 3 is a side view of the trolley shown in Figure 1, with the trolley in a folded state;

[0049] Figure 4 is an exploded view of part of the handframe structure in the trolley shown in Figure 1;

[0050] Figure 5 is a side view of the handframe in the trolley shown in Figure 1;

[0051] Figure 6 is a cross-sectional view along line U1-U1 in Figure 1;

[0052] Figure 7 is a perspective view of the rear wheel frame of the trolley shown in Figure 1;

[0053] Figure 8 is a perspective view of the rear wheel frame of the trolley shown in Figure 1 from another angle;

[0054] Figure 9 is an exploded view of some structures in the trolley shown in Figure 1;

[0055] Figure 10 is a cross-sectional view along line U2-U2 in Figure 2;

[0056] Figure 11 is a cross-sectional view along line U3-U3 in Figure 2, in which the wheel frame is omitted;

[0057] Figure 12 is a cross-sectional view of the trolley frame shown in Figure 1, in which the upper and lower trolley frames are unfolded relative to each other;

[0058] Figure 13 is a cross-sectional view of the trolley frame shown in Figure 1, in which the upper and lower trolley frames are in a transitional state between being relatively unfolded and folded.

[0059] Figure 14 is a cross-sectional view of the trolley frame shown in Figure 1, in which the upper and lower trolley frames are folded together.

[0060] Figure 15 is an exploded view of a portion of the handframe structure in the trolley according to the third embodiment of this application;

[0061] Figure 16 is a cross-sectional view of the frame shown in Figure 15, in which the upper frame and the lower frame are unfolded relative to each other;

[0062] Figure 17 is a cross-sectional view of the frame shown in Figure 15, in which the upper frame and the lower frame are in a transitional state between being relatively unfolded and folded.

[0063] Figure 18 is a cross-sectional view of the frame shown in Figure 15, in which the upper frame and the lower frame are folded together.

[0064] Figure 19 is an exploded view of a portion of the handframe structure in the trolley according to the fourth embodiment of this application;

[0065] Figure 20 is an exploded view of a portion of the handframe structure in the trolley according to the fourth embodiment of this application from another perspective;

[0066] Figure 21 is a cross-sectional view of the frame shown in Figure 19, in which the upper frame and the lower frame are unfolded relative to each other;

[0067] Figure 22 is a cross-sectional view of the frame shown in Figure 19, in which the upper frame and the lower frame are in a transitional state between being relatively unfolded and folded.

[0068] Figure 23 is a cross-sectional view of the frame shown in Figure 19, in which the upper frame and the lower frame are folded together.

[0069] Figure 24 is an exploded view of a portion of the handframe structure in the trolley according to the fifth embodiment of this application;

[0070] Figure 25 is a cross-sectional view of the hand frame in the trolley according to the fifth embodiment of this application;

[0071] Figure 26 is a cross-sectional view of the frame shown in Figure 24, in which the upper frame and the lower frame are unfolded relative to each other;

[0072] Figure 27 is a cross-sectional view of the frame shown in Figure 24, in which the upper frame and the lower frame are in a transitional state between being relatively unfolded and folded.

[0073] Explanation of reference numerals in the attached drawings: 1000, trolley; 100, trolley frame; 110, upper trolley frame; 111, first support rod; 112, push handle; 120, lower trolley frame; 121, second support rod; 130, first locking mechanism; 131, first connecting seat; 1311, first pivot; 1312, first connecting part; 1313, first through-passage; 1314, first chamber; 1315, first locking groove; 1316, first pivot; 132, second connecting seat; 1321, second pivot; 1322, second connecting part; 1323, second through-passage; 1324, second chamber; 1325, second locking groove; 1301, piece; 1301A, first piece; 1301B, second piece; 1301C, third piece; 1301D, Fourth piece; 133, Through space; 1331, Recess; 134, Guide; 135, Cover; 1351, Groove; 136, First driving member; 1371, First locking member; 13711, Locking tooth; 1372, Locking recess; 138, First traction member; 139, Second driving member; 141, Push button; 142, Fourth reset member; 143, First reset member; 200, Wheel frame; 210, Front wheel frame; 211, Front rod; 212, Front crossbar; 220, Rear wheel frame; 221, Rear rod; 222, Rear crossbar; 223, Installation 230. Second locking mechanism; 231. First pivot seat; 2311. Movable channel; 2312. First receiving cavity; 2313. First locking groove; 232. Second pivot seat; 233. Third pivot seat; 2331. Third receiving cavity; 2332. Third locking groove; 234. Second locking member; 235. Pushing member; 236. Second traction member; 237. Second reset member; 240. Drift locking mechanism; 241. Drift traction member; 242. Drift locking member; 243. Locking recess; 244. Third reset member; 310. Wheel seat; 310A. Front wheel seat ; 310B, Rear wheel seat; 320, Wheel; 320A, Front wheel; 320B, Rear wheel; 330, Connecting shaft; 400, Lock release mechanism; 410, First lock release component; 411, First drive unit; 420, Second lock release component; 421, Second drive unit; 430, Operating component; 440, First linkage component; 450, Second linkage component; 460, Actuating component; 500, Closing mechanism; F1, First direction; F2, Second direction; αa, Angle; α1, First angle; α2, Second angle; α3, Third angle; α4, Fourth angle; A1, First pivot point. Detailed Implementation

[0074] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0075] Figure 1 schematically shows a perspective view of a stroller 1000 provided according to some embodiments of the present invention. The stroller 1000 is generally symmetrical from left to right and can be used to carry children or pets, etc., without specific limitations. The stroller 1000 may include, for example, a handlebar 100, a wheel frame 200, and a release mechanism 400. The handlebar 100 and the wheel frame 200 are pivotally connected to each other so that the stroller 1000 can switch between an unfolded state (see Figures 1 and 2) and a folded state (see Figure 3). The release mechanism 400 may be provided on the handlebar 100 for user operation and can control the switching of the stroller 1000 between the unfolded and folded states. The specific structure and working principle of the components such as the handlebar 100, wheel frame 200, and release mechanism 400 will be further explained in the following description of the stroller 1000.

[0076] Referring to Figures 1 and 4, in the first embodiment, the hoist 100 includes an upper hoist 110, a lower hoist 120, and a first locking mechanism 130. The upper hoist 110 and the lower hoist 120 are pivotally connected via the first locking mechanism 130. Specifically, the first locking mechanism 130 includes a first connecting seat 131, a second connecting seat 132, and a first pivot 1316. The first connecting seat 131 and the second connecting seat 132 are pivotally connected to the first pivot 1316, and the first pivot 1316 can restrict the separation of the first connecting seat 131 and the second connecting seat 132 along a first axial direction. Specifically, the first connecting seat 131 is connected to the upper hoist 110, and the second connecting seat 132 is connected to the lower hoist 120. Therefore, when the first connecting seat 131 rotates about the first pivot 1316 relative to the second connecting seat 132, the upper frame 110 can pivot relative to the lower frame 120, thereby causing the frame 100 as a whole to fold or unfold.

[0077] Referring again to Figures 1 and 4, in one embodiment, the upper support frame 110 is, for example, generally U-shaped, and includes a push handle 112 and two first support rods 111. The two first support rods 111 are spaced apart approximately along a first direction F1 and are parallel to each other. The first direction F1 corresponds to the left-right direction. The push handle 112 is U-shaped and connects between the two first support rods 111, for use by a user to grip and push the trolley 1000. The lower support frame 120 includes, for example, two second support rods 121. The upper ends of the two second support rods 121 are, for example, pivotally connected to the lower ends of the first support rods 111 on the same side via a first locking mechanism 130. Specifically, the lower ends of the first support rods 111 are connected to a first connecting seat 131, and the upper ends of the second support rods 121 are connected to a second connecting seat 132. When the first connecting seat 131 rotates about the first pivot 1316 relative to the second connecting seat 132, the first support rod 111 moves closer to the second support rod 121 to fold or moves further apart to unfold.

[0078] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "left" and "right" used in the various embodiments of the present invention refer to the "left" and "right" orientations of the stroller 1000 during normal operation, and the "left" and "right" directions are schematically indicated by arrows L and R in the figures. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not intended to unduly limit the scope of protection of the present invention.

[0079] Referring to Figures 4 and 5, in one embodiment, the upper handrail 110 and the lower handrail 120 are further restricted or allowed to pivot relative to each other by a first locking mechanism 130. Specifically, the first locking mechanism 130 further includes a first locking member 1371 and a locking recess 1372. The first locking member 1371 is movably disposed on one of the first connecting seat 131 and the second connecting seat 132, and the locking recess 1372 is disposed on the other of the first connecting seat 131 and the second connecting seat 132. The first locking member 1371 is adapted to lock into the locking recess 1372 to restrict the pivoting of the first connecting seat 131 relative to the second connecting seat 132. Specifically, in this embodiment, the first locking member 1371 is movably disposed on the first connecting seat 131, and the locking recess 1372 is formed on the second connecting seat 132. When the first locking member 1371 extends into the locking recess 1372 to lock into it, the first connecting seat 131 is restricted from pivoting relative to the second connecting seat 132. This allows the upper frame 110 and the lower frame 120 to remain relatively extended, meaning they are approximately parallel and in the same plane, with an included angle αa of approximately 180° (see Figures 1 and 2). When the first locking member 1371 retracts from the locking recess 1372 to release it, the first connecting seat 131 is allowed to pivot relative to the second connecting seat 132. This allows the upper frame 110 and the lower frame 120 to fold relatively together, reducing the overall volume of the frame 100. After the upper frame 110 and the lower frame 120 are folded, the included angle αa approaches 0° (see Figure 3).

[0080] It should be noted that when the upper frame 110 and the lower frame 120 are in a relatively unfolded state, the included angle αa between them can be greater than or less than 180°; after the upper frame 110 and the lower frame 120 are folded, the included angle αa between them can also be greater than 0°, and no specific restrictions are imposed here.

[0081] Referring to Figure 1, in one embodiment, the wheel frame 200 includes a front wheel frame 210 and a rear wheel frame 220 pivotally connected to each other. Specifically, the front wheel frame 210 is, for example, U-shaped, and includes front members 211 located on the left and right sides and a front crossbar 212 connected between the two front members 211. The front crossbar 212 extends generally along a first direction F1. The trolley 1000 also includes at least one wheel seat 310 (hereinafter referred to as front wheel seat 310A) mounted to the bottom of the front wheel frame 210 and at least one wheel 320 (hereinafter referred to as front wheel 320A) mounted to the at least one wheel seat 310. In this embodiment, two front wheel seats 310A are mounted on the bottom of the front wheel frame 210, and the two front wheel seats 310A are spaced apart in the left-right direction (i.e., the first direction F1). More specifically, the two front wheel seats 310A are generally mounted at the left and right ends of the front crossbar 212, and each front wheel seat 310A is used to mount a front wheel 320A. The front wheel mount 310A is rotatably connected to the front wheel 320A. Alternatively, in another embodiment, the front wheel frame 210 may have other implementations. For example, the front wheel frame 210 may include only two front struts 211, with one end of each strut connected to form a V-shaped structure. A front wheel mount 310A may be centrally mounted at the bottom of the front wheel frame 210. Alternatively, the front wheel frame 210 may include only two front struts 211 spaced apart in the left-right direction, with the two front wheel mounts 310A connected to the two front struts 211 respectively.

[0082] Referring again to Figure 1, in one embodiment, the rear wheel frame 220 has a U-shaped structure, including two rear rods 221 located on the left and right sides, and a rear crossbar 222 connected between the two rear rods 221. The rear crossbar 222 extends along a first direction F1. The trolley 1000 also includes at least one wheel seat 310 (referred to here as rear wheel seat 310B) mounted to the bottom of the rear wheel frame 220 and at least one wheel 320 (referred to here as rear wheel 320B) mounted to the at least one wheel seat 310. In this embodiment, two rear wheel seats 310B are mounted on the bottom of the rear wheel frame 220, and the two rear wheel seats 310B are spaced apart in the left-right direction (i.e., the first direction F1). More specifically, in this embodiment, as shown in Figures 6 to 8, the rear wheel frame 220 also includes at least two mounting seats 223, which are mounted on the left and right ends of the rear crossbar 222; or, the two mounting seats 223 are respectively connected to the two rear rods 221. Each mounting base 223 is connected to a rear wheel seat 310B, and each rear wheel seat 310B is used to mount a rear wheel 320B. More specifically, the rear wheel seat 310B is rotatably connected to the rear wheel 320B, and the rear wheel seat 310B is rotatably connected to the corresponding mounting base 223 via a connecting shaft 330. Of course, in another alternative embodiment, the rear wheel frame 220 can have other implementations. For example, the rear wheel frame 220 may only include two rear rods 221 and one mounting base 223, with one end of the two rear rods 221 connected to make the rear wheel frame 220 have a V-shaped structure, and a mounting base 223 may be centrally mounted at the bottom of the rear wheel frame 220 for connecting the rear wheel seat 310B. Alternatively, for example, the rear wheel frame 220 may only include two rear rods 221 spaced apart in the left-right direction and two mounting bases 223, with the two mounting bases 223 respectively connected to the two rear rods 221.

[0083] Referring to Figure 6, in one embodiment, the trolley 1000 is further provided with a drift locking mechanism 240, which restricts or allows the wheel seat 310 to rotate relative to the wheel frame 200. Specifically, the drift locking mechanism 240 restricts or allows the rear wheel seat 310B to rotate relative to the mounting base 223 of the rear wheel frame 220. When the rear wheel seat 310B is fixed relative to the mounting base 223, the rear wheel 320B can only rotate about its axis relative to the rear wheel frame 220, the steering of the trolley 1000 is locked, and the trolley 1000 can move forward or backward in a straight line. When the rear wheel seat 310B is rotatable relative to the mounting base 223, the rear wheel 320B can rotate about its axis relative to the rear wheel frame 220 and can rotate about a direction perpendicular to the axis of the rear wheel frame 220 (i.e., about the circumferential direction of the connecting shaft 330) relative to the rear wheel frame 220, thus allowing the trolley 1000 to perform a steering drift operation.

[0084] In this embodiment, as shown in Figures 6 to 8, the drift locking mechanism 240 includes a drift locking member 242 and a locking recess 243. The wheel seat 310 (specifically, the rear wheel seat 310B) is provided with the locking recess 243. The drift locking member 242 is movably disposed on the wheel frame 200 (specifically, the mounting seat 223 on the rear wheel frame 220) and adapted to engage with the locking recess 243 to restrict the rotation of the wheel seat 310. Specifically, as shown in Figure 6, when the drift locking member 242 extends into the locking recess 243 to lock into the locking recess 243, the rear wheel seat 310B is restricted from rotating relative to the mounting seat 223, thereby restricting the drift steering of the trolley 1000. When the drift locking member 242 retracts from the locking recess 243 to release the lock, the rear wheel seat 310B is allowed to rotate relative to the mounting seat 223, thereby allowing the trolley 1000 to drift steering.

[0085] Referring to Figure 6, in one embodiment, the drift locking mechanism 240 further includes a third reset member 244, which abuts between the mounting base 223 and the drift locking member 242, and is used to provide an elastic restoring force to the drift locking member 242 so that the drift locking member 242 always has a tendency to extend into the locking recess 243. The third reset member 244 can be, for example, an elastic component such as a spring or a sheet.

[0086] Referring to Figures 1, 9, and 10, in one embodiment, the trolley 1000 is further provided with a second locking mechanism 230, through which the lower handle 120 and the wheel frame 200 are pivotally connected. Specifically, the second locking mechanism 230 includes a first pivot seat 231, a second pivot seat 232, and a third pivot seat 233 pivotally connected to each other about a second axis. The second pivot seat 232 is located between the first pivot seat 231 and the third pivot seat 233 along the second axis. The first pivot seat 231 connects to the handle 100, the second pivot seat 232 connects to the front wheel frame 210, and the third pivot seat 233 connects to the rear wheel frame 220. Specifically, in this embodiment, the lower end of the lower handrail 120 (specifically the second support rod 121) is connected to the first pivot seat 231, the top end of the front wheel frame 210 (specifically the front rod 211) is connected to the second pivot seat 232, and the top end of the rear wheel frame 220 (specifically the rear rod 221) is connected to the third pivot seat 233. Of course, in other embodiments, the second pivot seat 232 can also be connected to the rear wheel frame 220, and the third pivot seat 233 can also be connected to the front wheel frame 210; no specific limitation is made here. In this way, when the first pivot seat 231, the second pivot seat 232, and the third pivot seat 233 pivot relative to each other, the front wheel frame 210, the rear wheel frame 220, and the handrail 100 can be folded or unfolded relative to each other, thereby allowing the trolley 1000 to switch between an unfolded state (see Figure 1) and a folded state (see Figure 3). Specifically, when the trolley 1000 is in the unfolded state, the handlebar frame 100, the front wheel frame 210 and the rear wheel frame 220 are spaced apart circumferentially, and the handlebar frame 100 and the front wheel frame 210 are approximately on the same plane. The rear wheel frame 220 is located circumferentially between the front wheel frame 210 and the handlebar frame 100. The front wheel frame 210 and the rear wheel frame 220 are set at a first included angle α1 (see Figures 1 and 2), and the handlebar frame 100 and the front wheel frame 210 are set at a second included angle α2 (see Figures 1 and 2). When the trolley 1000 is in the folded state, the handlebar frame 100 is close to the rear wheel frame 220 in the circumferential direction, the front wheel frame 210 and the rear wheel frame 220 are close to each other in the circumferential direction, and the front wheel frame 210 and the rear wheel frame 220 are set at a third included angle α3 (see Figure 3), and the handlebar frame 100 and the front wheel frame 210 are set at a fourth included angle α4 (see Figure 3). The third included angle α3 is smaller than the first included angle α1, and the fourth included angle α4 is smaller than the second included angle α2.

[0087] In one embodiment, the dismount handrail 120 and wheel frame 200 can also be restricted or allowed to pivot relative to each other by a second locking mechanism 230. Specifically, as shown in Figures 9 and 10, the second locking mechanism 230 further includes a second locking member 234, which is movably disposed between the first pivot seat 231 and the third pivot seat 233 along a second axis and is used to restrict or allow relative pivoting between them. More specifically, the second locking member 234 has a second locking position and a second unlocking position between the first pivot seat 231 and the third pivot seat 233. When the second locking member 234 is in the second locking position (see Figure 10), the first pivot seat 231 and the third pivot seat 233 are relatively fixed; when the second locking member 234 is in the second unlocking position, the first pivot seat 231 can pivot relative to the third pivot seat 233.

[0088] Referring to Figures 9 and 10, in one embodiment, the second locking member 234 is a gear structure. The first pivot seat 231 has a generally circular first receiving cavity 2312 on the side facing the second pivot seat 232, and a plurality of circumferentially spaced first locking grooves 2313 on the inner wall of the first receiving cavity 2312. The third pivot seat 233 has a generally circular third receiving cavity 2331 on the side facing the second pivot seat 232, and a plurality of circumferentially spaced third locking grooves 2332 on the inner wall of the third receiving cavity 2331. As shown in Figure 10, when the second locking member 234 is in the second locked position, one end of the second locking member 234 along the second axial direction is located in the first receiving cavity 2312, and the other end is located in the third receiving cavity 2331. Thus, the plurality of protruding teeth on the outer periphery of the second locking member 234 simultaneously engage with the plurality of first locking grooves 2313 and the plurality of third locking grooves 2332 along the second axial direction. When the second locking member 234 is in the second unlocking position, the second locking member 234 can be completely moved into the first receiving cavity 2312 or the third receiving cavity 2331. Correspondingly, the multiple protrusions on the outer periphery of the second locking member 234 engage only with the multiple first locking grooves 2313 or the third locking grooves 2332 along the second axial direction. Specifically, in this embodiment, when the second locking member 234 is in the second unlocking position, the second locking member 234 is completely moved into the third receiving cavity 2331.

[0089] Referring to Figures 9 and 10, in one embodiment, the second locking mechanism 230 further includes a second reset member 237. The second reset member 237 is located along a second axial direction between the second locking member 234 and the third pivot seat 233 and provides an elastic restoring force to the second locking member 234 to maintain it in the second locked position. The second reset member 237 can be, for example, an elastic component such as a spring or a spring sheet. Specifically, in this embodiment, the second reset member 237 is a compression spring, with both ends abutting between the second locking member 234 and the third pivot seat 233.

[0090] Referring to Figures 1, 2, and 9, in one embodiment, the trolley 1000 further includes a folding mechanism 500, which is disposed between the front wheel frame 210 and the rear wheel frame 220 and is drivenly connected to the second locking mechanism 230. When the first pivot seat 231 pivots relative to the third pivot seat 233, the folding mechanism 500 can drive the second pivot seat 232 to pivot relative to the third pivot seat 233, thereby allowing the front wheel frame 210 and the rear wheel frame 220 to move closer together to fold the wheel frame 200 or move away from each other to unfold the wheel frame 200. When the first pivot seat 231 and the third pivot seat 233 remain relatively fixed, the folding mechanism 500 can restrict the pivoting of the second pivot seat 232 relative to the third pivot seat 233.

[0091] In this embodiment, when both the first locking mechanism 130 and the second locking mechanism 230 are released, i.e., when the first locking member 1371 is in the first released position and the second locking member 234 is in the second released position, the upper frame 110 can pivot and fold relative to the lower frame 120, and the lower frame 120 can pivot and fold relative to the rear wheel frame 220, and the front wheel frame 210 can pivot and fold relative to the rear wheel frame 220, thus allowing the trolley 1000 to be in a folded state. As shown in Figure 3, when the trolley 1000 is in the folded state, the wheels 320 on the wheel frames 200 (including the front wheel frame 210 and the rear wheel frame 220) are on the same horizontal plane as the first locking mechanism 130. When the trolley 1000 is placed on a horizontal ground, the wheels 320 and the first locking mechanism 130 respectively form a support point with the ground, and the two cooperate to support the trolley 1000 so that the trolley 1000 can be placed upright.

[0092] In this embodiment, the release mechanism 400 can drive and cooperate with the first locking mechanism 130, the second locking mechanism 230, and the drift locking mechanism 240. Specifically, as shown in FIG1, the release mechanism 400 is specifically disposed on the push handle 112 of the upper handlebar 110, which facilitates user operation of the release mechanism 400. In this embodiment, the release mechanism 400 has a first release state and a second release state. Specifically, when the release mechanism 400 is in the first release state, the release mechanism 400 releases the first locking mechanism 130 and / or the second locking mechanism 230. In other words, the release mechanism 400 can release at least one of the first locking mechanism 130 and the second locking mechanism 230. For example, in this embodiment, the release mechanism 400 releases the first locking mechanism 130, and the first locking mechanism 130 drives the second locking mechanism 230 to release (the specific principle can be found later). Of course, in other embodiments, the release mechanism 400 may also release the second locking mechanism 230, which in turn releases the first locking mechanism 130; or, the release mechanism 400 may release both the first locking mechanism 130 and the second locking mechanism 230 simultaneously. Specifically, when the first locking mechanism 130 is released, it allows the first connecting seat 131 to pivot relative to the second connecting seat 132, thereby allowing the upper handrail 110 to pivot relative to the lower handrail 120; when the second locking mechanism 230 is released, it allows the first pivot seat 231 and the third pivot seat 233 to pivot relative to each other, thereby allowing the lower handrail 120 to pivot relative to the wheel frame 200. In this way, the trolley 1000 can be switched from an unfolded state to a folded state (switching from Figure 1 to Figure 3). When the release mechanism 400 is in the second release state, it releases the drift locking mechanism 240 to allow the rear wheel seat 310B to rotate relative to the rear wheel frame 220.

[0093] Optionally, in other embodiments, the second locking mechanism 230 can be omitted, and the trolley 1000 as a whole can be kept in the unfolded state by the first locking mechanism 130. Specifically, the release mechanism 400 can release the first locking mechanism 130, and when the first locking mechanism 130 is released, the trolley 1000 as a whole can be folded up.

[0094] The following, with reference to relevant diagrams, details the cooperation relationship between the release mechanism 400 and the first locking mechanism 130, the second locking mechanism 230, and the drift locking mechanism 240.

[0095] Referring to Figure 11, in one embodiment, the release mechanism 400 includes a first release member 410, a second release member 420, and an operating member 430. The first release member 410 and the second release member 420 can both be disc-shaped, for example, and are rotatably mounted on the push handle 112 of the frame 100 via connecting members such as pins. The first release member 410 is driven connected to the first locking mechanism 130 (referencing Figures 5 and 11) to allow the upper frame 110 to pivot relative to the lower frame 120. The second release member 420 is driven connected to the drift locking mechanism 240 (referencing Figures 6 and 11) to allow the wheel seat 310 to rotate relative to the wheel frame 200. Specifically, the operating member 430 is movably mounted on the frame 100 and selectively drives either the first release member 410 or the second release member 420 to rotate.

[0096] Please refer to Figure 11. In this embodiment, the release mechanism 400 further includes a first linkage 440, a second linkage 450, and a toggle member 460. The first linkage 440 is driven to the first release member 410, the second linkage 450 is driven to the second release member 420, and the toggle member 460 is connected to both the first linkage 440 and the second linkage 450. Specifically, the toggle member 460 is movably mounted on the rider frame 100 and can switch between a first position and a second position, thus driving the first linkage 440 and the second linkage 450 to move along a first direction F1. More specifically, when the toggle member 460 is in the first position, the operating member 430 is operated (e.g., pressed) to push the first linkage 440 to move along a second direction F2, causing the first release member 410 to rotate. When the actuating member 460 is in the second position, the operating member 430 is operated to push the second linkage member 450 to move along the second direction F2, thereby causing the second release member 420 to rotate. The first direction F1 intersects the second direction F2.

[0097] Referring again to Figure 11, in this embodiment, the first unlocking member 410 is provided with a first driving part 411. The rotation center of the first driving part 411 and the first unlocking member 410 are offset, for example, they can be arranged in a straight line or in a non-linear shape, but are not limited thereto. Referring to Figures 5 and 11, the first locking mechanism 130 also includes a first traction member 138. The first driving part 411 of the first unlocking member 410 is connected to the first locking member 1371 through the first traction member 138; in other words, the first traction member 138 connects the first unlocking member 410 (e.g., the first driving part 411) and the first locking member 1371. Therefore, when the actuating member 460 is in the first position and the operating member 430 is operated by the user to make the first unlocking member 410 rotate about its rotation center, the first driving part 411 will rotate synchronously about the rotation center of the first unlocking member 410, which will drive the first traction member 138 to move to pull the first locking member 1371 to move and retract from the locking recess 1372, thereby allowing the first connecting seat 131 to pivot relative to the second connecting seat 132.

[0098] In one embodiment, the first locking mechanism 130 further includes a first reset member 143 (see Figures 4 and 5), which abuts against the first locking member 1371 and the first connecting seat 131 or the upper frame 110, and provides an elastic restoring force to the first locking member 1371 so that the first locking member 1371 always has a tendency to extend into the locking recess 1372. The first reset member 143 may be, for example, an elastic component such as a spring or a spring sheet.

[0099] In this embodiment, as shown in FIG9, the second locking mechanism 230 further includes a pusher 235. The pusher 235 is disposed along a second axial direction between the first pivot 231 and the third pivot 233 and adjacent to the second locking member 234. Furthermore, the pusher 235 is rotatably disposed between the first pivot 231 and the third pivot 233 and has an initial position and an unlocked position. The pusher 235 is adapted to drive the second locking member 234 to move from the second locked position to the second unlocked position. Specifically, when the pusher 235 rotates from the initial position to the unlocked position, the pusher 235 can drive the second locking member 234 to move from the second locked position to the second unlocked position.

[0100] Referring to Figure 9, in order to achieve the conversion of the pusher 235 from rotational motion to drive the second locking member 234 to move along the second axial direction, in one embodiment, the first pivot seat 231 is provided with a first abutment portion (not shown in the figure), which is adapted to abut against the pusher 235. When the pusher 235 is in the initial position, the first abutment portion can contact the pusher 235; when the pusher 235 rotates from the initial position to the unlocked position, the pusher 235 abuts against the first abutment portion and moves along the second axial direction along the axial force generated by the first abutment portion, thereby pushing the second locking member 234 to move along the second axial direction from the second locked position to the second unlocked position. Of course, in other embodiments, the pusher 235 may, for example, be provided with a pusher portion (not shown in the figure), which protrudes along the second axial direction and extends obliquely in the circumferential direction, and the second locking member 234 has a second abutment portion (not shown in the figure), which protrudes along the second axial direction and extends obliquely in the circumferential direction. The pushing part and the second abutting part abut against each other along the second axis, and when the pushing member 235 is in the initial position, the pushing part and the second abutting part are engaged with each other. Therefore, when the pushing member 235 rotates from the initial position to the unlocked position, the pushing part will push the second abutting part to move, thereby driving the second locking member 234 to move along the second axis from the second locked position to the second unlocked position.

[0101] Referring to Figures 4 and 9, in one embodiment, the first locking mechanism 130 further includes a first driving member 136, which is fixedly connected to the first connecting seat 131 and coaxially arranged with the first pivot 1316. Therefore, when the first connecting seat 131 rotates relative to the second connecting seat 132 about the first pivot 1316, the first driving member 136 rotates with the first connecting seat 131 about the first pivot 1316. Further, in one embodiment, the second locking mechanism 230 further includes a second traction member 236, which is connected between the first driving member 136 and the pushing member 235. When the first connecting seat 131 pivots relative to the second connecting seat 132 to fold the upper handframe 110 and the lower handframe 120 relative to each other, the second traction member 236 can drive the push member 235 to rotate by the first driving member 136 rotating around the first pivot 1316, so that the push member 235 moves from the initial position to the unlocked position, thereby causing the second locking member 234 to move from the second locked position to the second unlocked position, ultimately allowing the lower handframe 120 to pivot relative to the wheel frame 200 to fold. In this invention, when the upper handframe 110 folds relative to the lower handframe 120, the lower handframe 120 can simultaneously fold relative to the wheel frame 200; in other words, the trolley 1000 in this invention can achieve overall synchronous unlocking and folding, which has the advantages of convenient folding, simple structure and easy operation.

[0102] Optionally, in other embodiments, the first driving member 136 can be omitted, and the second traction member 236 is connected between the edge of the first connecting seat 131 and the push member 235. When the first connecting seat 131 pivots relative to the second connecting seat 132, the push member 235 can also be driven to rotate from the initial position to the unlocked position by the second traction member 236.

[0103] Referring to Figure 11, in one embodiment, the second release member 420 is provided with a second drive unit 421. The rotation center of the second drive unit 421 and the second release member 420 are offset, for example, they can be arranged in a straight line or in a non-linear shape, but are not limited thereto. The second drive unit 421 is used to connect to the drift locking mechanism 240. Specifically, referring to Figures 6, 11 and 12, the drift locking mechanism 240 also has a drift traction member 241, which is disposed in the wheel frame 200 and the rider frame 100 and passes through the first locking mechanism 130 and the second locking mechanism 230. More specifically, one end of the drift traction member 241 passes through the first locking mechanism 130 and connects to the second release member 420 (e.g., the second drive unit 421), and the other end passes through the second locking mechanism 230 and connects to the drift locking member 242 disposed in the rear wheel frame 220. Therefore, when the actuating member 460 is in the second position and the operating member 430 is operated by the user to make the second release member 420 rotate around its rotation center, the second driving unit 421 will rotate synchronously around the rotation center of the second release member 420, which will drive the drift traction member 241 to move to pull the drift locking member 242 to move to disengage from the locking recess 243. This allows the wheel seat 310 to rotate relative to the wheel frame 200, specifically allowing the rear wheel seat 310B to rotate relative to the mounting seat 223 on the rear wheel frame 220, so that the trolley 1000 has the function of drift steering.

[0104] Referring to Figures 12 to 14, in one embodiment, the first connecting seat 131 has a first through-channel 1313, which communicates with the inner cavity of the upper frame 110 when the first connecting seat 131 is connected to the upper frame 110. The second connecting seat 132 has a second through-channel 1323, which communicates with the inner cavity of the lower frame 120 when the second connecting seat 132 is connected to the lower frame 120. It should be noted that the first support rod 111 and the push rod 112 of the upper frame 110 are both hollow tubular structures. Therefore, the "inner cavity of the upper frame 110" can refer to the tubular inner cavity of the first support rod 111 and / or the push rod 112. Similarly, the second support rod 121 of the lower frame 120 is a hollow tubular structure; therefore, "the inner cavity of the lower frame 120" refers to the tubular inner cavity of the second support rod 121. It should also be noted that the first through-channel 1313 is connected to the second through-channel 1323. Thus, one end of the drift traction member 241 can be considered to pass through the first through-channel 1313 and extend into the inner cavity of the upper frame 110, while the other end can be considered to pass through the second through-channel 1323 and extend into the inner cavity of the lower frame 120.

[0105] Referring to Figures 4 and 12 to 14, in the first embodiment, a through space 133 is formed between the first connecting seat 131 and the second connecting seat 132, and the through space 133 is connected to the first through channel 1313 and the second through channel 1323. The drift traction member 241 passes through the through space 133. From another perspective, one end of the drift traction member 241 can be regarded as passing through the through space 133, through the first through channel 1313, through the first connecting seat 131, and extending into the inner cavity of the upper frame 110. The other end of the drift traction member 241 can be regarded as passing through the through space 133, through the second through channel 1323, through the second connecting seat 132, and extending into the inner cavity of the lower frame 120 and the inner cavity of the rear wheel frame 220.

[0106] Specifically, in this embodiment, as shown in FIG4, the first connecting seat 131 includes a first pivot portion 1311 and a first connecting portion 1312 connected to each other, the first connecting portion 1312 being connected to the upper frame 110. The second connecting seat 132 includes a second pivot portion 1321 and a second connecting portion 1322 connected to each other, the second connecting portion 1322 being connected to the lower frame 120. Both the first pivot portion 1311 and the second pivot portion 1321 include two pieces 1301 arranged opposite to each other. The two pieces 1301 of the first pivot portion 1311 and the two pieces 1301 of the second pivot portion 1321 are arranged alternately and pivotally connected, and a through space 133 can be formed between any two adjacent pieces 1301.

[0107] To clearly understand the arrangement of the pieces 1301, as shown in Figure 4, the two pieces 1301 from left to right on the first pivot 1311 are referred to as the first piece 1301A and the second piece 1301B, respectively, and the two pieces 1301 from left to right on the second pivot 1321 are referred to as the third piece 1301C and the fourth piece 1301D, respectively. Therefore, "the two pieces 1301 of the first pivot 1311 and the two pieces 1301 of the second pivot 1321 are arranged alternately" includes two arrangement methods: First, the pieces 1301 from left to right are the third piece 1301C, the first piece 1301A, the fourth piece 1301D, and the second piece 1301B; Second, the pieces 1301 from left to right are the first piece 1301A, the third piece 1301C, the second piece 1301B, and the fourth piece 1301D. Specifically, in this embodiment, the pieces 1301, from left to right, are a third piece 1301C, a first piece 1301A, a fourth piece 1301D, and a second piece 1301B. The third piece 1301C, the first piece 1301A, the fourth piece 1301D, and the second piece 1301B are pivotally connected via a first pivot 1316, forming a through-space 133 between the first piece 1301A and the fourth piece 1301D. Of course, in other embodiments, the through-space 133 may also be formed between the third piece 1301C and the first piece 1301A, or between the fourth piece 1301D and the second piece 1301B; no specific limitation is made here.

[0108] Referring to Figures 12 to 14, in one embodiment, at least one of the first piece 1301A and the fourth piece 1301D is provided with a recess 1331. The recess 1331 is sunken relative to the surface of the corresponding piece 1301 to form a through space 133. When the first connecting seat 131 pivots relative to the second connecting seat 132, it can be considered that when the first piece 1301A pivots relative to the fourth piece 1301D, the drifting traction member 241 is accommodated in the sunken through space 133. In this way, the drifting traction member 241 can be avoided from being squeezed by the first piece 1301A and / or the fourth piece 1301D, which would affect the flexible movement of the drifting traction member 241.

[0109] Referring again to Figures 12 to 14, in one embodiment, a guide portion 134 protrudes from the side of the first piece 1301A and / or the fourth piece 1301D facing the passage space 133. This guide portion 134 has a generally arcuate sidewall. When the first connecting seat 131 pivots relative to the second connecting seat 132, the arcuate sidewall of the guide portion 134 is adapted to guide the drift traction member 241 to bend. This ensures the flexibility of movement of the drift traction member 241 while reducing the bending amplitude, preventing stress concentration at the bend, and thus extending the service life of the drift traction member 241.

[0110] Referring to Figures 9 and 12, in one embodiment, the first pivot seat 231 of the second locking mechanism 230 is provided with a movable channel 2311. The drift traction member 241 passes through the through space 133 of the first locking mechanism 130 and the movable channel 2311 and extends into the inner cavity of the rear wheel frame 220. Similarly, it should be noted that the rear rod 221 and the rear crossbar 222 of the rear wheel frame 220 are both hollow tubular structures. Therefore, the aforementioned "inner cavity of the rear wheel frame 220" can refer to the tubular inner cavity of the rear rod 221 and / or the rear crossbar 222.

[0111] The following section, with reference to relevant illustrations, briefly explains the operation of the trolley 1000 in this embodiment.

[0112] Referring to Figure 1, when the trolley 1000 is fully extended, the first locking mechanism 130 is locked (see Figure 5), and the upper handrail 110 and lower handrail 120 remain relatively extended; the second locking mechanism 230 is locked (see Figure 10), and the lower handrail 120, front wheel frame 210, and rear wheel frame 220 all remain relatively extended. The drift locking mechanism 240 can be locked (see Figure 6), and the rear wheel seat 310B is restricted from rotating relative to the rear wheel frame 220.

[0113] Referring to Figures 6 and 11, when the user needs to change the steering of the trolley 1000, the user first operates (e.g., pushes, pulls) the actuating member 460 to place it in the second position; then, the user operates (e.g., presses) the operating member 430, which pushes against the second linkage member 450 and causes the second release member 420 to rotate around its rotation center. This, in turn, causes the drift traction member 241 to move, pulling the drift locking member 242 out of the locking recess 243, thus releasing the drift locking mechanism 240. In this way, the rear wheel 320B and subsequent wheel seat 310B can rotate relative to the rear wheel frame 220 around the connecting shaft 330 for steering. When the user releases the operating member 430, under the elastic restoring force of the third reset member 244, the drift locking member 242 re-enters the locking recess 243, keeping the drift locking mechanism 240 in the locked state.

[0114] Referring to Figures 10 to 14, when the user needs to fold the trolley 1000, the user first operates the actuating member 460 to place it in the first position; then, the user operates the operating member 430, which pushes against the first linkage member 440 and causes the first unlocking member 410 to rotate around its rotation center. This, in turn, causes the first traction member 138 to move, pulling the first locking member 1371 out of the locking recess 1372, so that the first locking mechanism 130 is in the unlocked state. In this way, the upper handlebar 110 can rotate relative to the lower handlebar 120 around the first pivot 1316, so that the upper handlebar 110 can be folded relative to the lower handlebar 100. During the pivoting process of the upper frame 110 relative to the lower frame 120, the first drive member 136 or the first connecting seat 131 drives the pusher 235 to rotate from the initial position to the unlocked position via the second traction member 236, thereby driving the second locking member 234 to move along the second axis from the second locked position to the second unlocked position. When the second locking member 234 moves to the second unlocked position, the first pivot seat 231 can rotate relative to the third pivot seat 233; with the cooperation of the retraction mechanism 500, the second pivot seat 232 can also rotate relative to the third pivot seat 233, ultimately realizing the relative pivoting and folding of the lower frame 120, the front wheel frame 210, and the rear wheel frame 220.

[0115] It should be noted that during the folding process of the trolley 1000, the drift traction component 241 remains housed within the through space 133 of the first locking mechanism 130 and bends around the guide portion 134 as the upper frame 110 pivots relative to the lower frame 120 (see Figures 12 to 14). This ensures the flexibility of the drift traction component 241 while reducing the bending amplitude, preventing stress concentration at the bending point, and thus extending the service life of the drift traction component 241. Furthermore, it should be noted that in this embodiment, when the first locking mechanism 130 releases, during the pivoting and folding process of the upper frame 110 relative to the lower frame 120, the drift traction component 241 remains stationary and does not move along the length of the upper frame 110 or the lower frame 120. Therefore, it does not cause the drift locking component 242 to move to release the steering of the rear wheel seat 310B. In this embodiment, the overall folding and steering operations of the trolley 1000 are independent and are two unaffected processes. In other words, when the trolley 1000 is folded up, the state of the rear wheel seat 310B (i.e., whether it is restricted from turning or allowed to turn) is not affected; similarly, when the rear wheel seat 310B is unlocked, the state of the trolley 1000 is not affected.

[0116] In this embodiment, the drift traction component 241 includes a steel wire and a sheath sleeved over the steel wire. The first end of the steel wire corresponds to and is close to the first end of the sheath. The first end of the steel wire is connected to the second release component 420. The first end of the sheath is fixed in the inner cavity of the frame 100. The second end of the steel wire corresponds to and is close to the second end of the sheath. The second end of the steel wire is connected to the drift locking component 242. The second end of the sheath is fixed in the inner cavity of the wheel frame 200. During the retraction process of the upper frame 110 and the lower frame 120 pivoting relative to each other, since the second release member 420 does not rotate relative to the frame 100 and the first end of the sheath does not move relative to the frame 100, the distance between the first end of the steel wire and the first end of the sheath remains unchanged. This ensures that the distance between the second end of the steel wire and the second end of the sheath also remains unchanged. As a result, the second end of the steel wire will not pull the drift traction member 241 to move, ensuring that the retraction process of the frame 100 will not affect the movement and release of the drift locking member 241.

[0117] The second embodiment of the present invention also provides a trolley 1000, which is similar to the first embodiment described above, including components such as a handlebar frame 100, a wheel frame 200, and a release mechanism 400. The trolley 1000 of this embodiment can be considered a variation of the trolley 1000 of the first embodiment. Therefore, unless otherwise specified, the structure of the components and the connection relationships between the components in this embodiment can be referred to the description in the first embodiment above. The following mainly describes the differences between this embodiment and the first embodiment.

[0118] In this embodiment, the structure of the first locking mechanism 130 is slightly different from that in the first embodiment. Specifically, one of the first pivot portion 1311 and the second pivot portion 1321 includes two oppositely arranged plates 1301, and the other of the first pivot portion 1311 and the second pivot portion 1321 is pivotally connected between the two plates 1301, and a through space 133 can be formed between the first pivot portion 1311 and the second pivot portion 1321. Specifically, in this embodiment, the first pivot portion 1311 includes two plates 1301 (the two plates 1301 can be referred to as the first plate 1301A and the second plate 1301B, respectively), and the second pivot portion 1321 includes a plate 1301 (which can be referred to as the third plate 1301C) and is pivotally connected between the first plate 1301A and the second plate 1301B. A passage space 133 for the drift traction member 241 to pass through can be formed between the third plate 1301C and the first plate 1301A or the third plate 1301C and the second plate 1301B. A guide portion 134 protrudes on the side facing the passage space 133, and the guide portion 134 is adapted to guide the drift traction member 241 to bend. Other structures are described with reference to the first embodiment, and will not be repeated in the second embodiment.

[0119] The third embodiment of the present invention also provides a trolley 1000, which is similar to the first embodiment described above. It also includes components such as a handlebar frame 100, a wheel frame 200, and a release mechanism 400. The trolley 1000 of this embodiment can be considered a variation of the trolley 1000 of the first embodiment. Therefore, unless otherwise specified, the structure of the components and the connection relationships between the components in this embodiment can be referred to the description in the first embodiment above. The following mainly describes the differences between this embodiment and the first embodiment.

[0120] As shown in Figures 15 to 18, in this embodiment, the structure of the first locking mechanism 130 is slightly different from that in the first embodiment. Specifically, as shown in Figures 15 and 16, the first locking mechanism 130 further includes a cover 135, which is connected to the first connecting seat 131 or the second connecting seat 132, and a passage space 133 is formed between the cover 135 and the first connecting seat 131 or the cover 135 and the second connecting seat 132, and the drifting traction member 241 passes through this passage space 133. In other words, in this embodiment, the passage space 133 is formed between the cover 135 and the first connecting seat 131 or the cover 135 and the second connecting seat 132, instead of being formed between the first connecting seat 131 and the second connecting seat 132 as shown in the first embodiment.

[0121] In this embodiment, the structures of the first connecting seat 131 and the second connecting seat 132 are the same as those shown in the second embodiment above. For details, please refer to the second embodiment. As shown in FIG15, the third piece 1301C is pivotally connected between the first piece 1301A and the second piece 1301B. The cover 135 can be connected to the side of the first piece 1301A opposite to the third piece 1301C or the side of the second piece 1301B opposite to the third piece 1301C. Correspondingly, a through space 133 is formed between the cover 135 and the first piece 1301A or the cover 135 and the second piece 1301B. Specifically, in this embodiment, the cover 135 is connected to the side of the first piece 1301A opposite to the third piece 1301C and forms a through space 133 between it and the first piece 1301A.

[0122] Referring to Figures 15 to 18, in one embodiment, the cover 135 has a recessed groove 1351 on the side facing the first connecting seat 131, forming a through space 133 between the groove 1351 and the first piece 1301A. Specifically, in this embodiment, the first driving member 136 protrudes into the through space 133. The first driving member 136 is generally cylindrical and has an arc-shaped peripheral wall. Therefore, when the first connecting seat 131 pivots relative to the second connecting seat 132 (as shown in Figures 17 and 18), the arc-shaped peripheral wall of the first driving member 136 can be used to guide the drift traction member 241 to bend. In this way, the bending amplitude of the drift traction member 241 can be reduced, stress concentration at the bending point can be prevented, thereby extending the service life of the drift traction member 241. Similarly, in this embodiment, during the pivoting and folding of the upper frame 110 relative to the lower frame 120 and the folding of the trolley 1000, the drift traction member 241 will remain stationary and will not move along the length direction of the upper frame 110 or the lower frame 120. Therefore, it will not drive the drift locking member 242 to move to release the steering of the rear wheel seat 310B, which will not be described in detail here.

[0123] It should be noted that the operation process of the trolley 1000 in this embodiment is roughly the same as that in the first embodiment, and will not be described in detail here.

[0124] The fourth embodiment of the present invention also provides a trolley 1000, which is similar to the first embodiment described above, and includes components such as a handlebar frame 100, a wheel frame 200, and a release mechanism 400. The trolley 1000 of this embodiment can be considered a variation of the trolley 1000 of the first embodiment described above. Unless otherwise specified, the structure of the components and the connection relationships between the components in this embodiment can be referred to the description in the first embodiment above. The following mainly describes the differences between this embodiment and the first embodiment described above.

[0125] Specifically, the structure of the first locking mechanism 130 in this embodiment differs from that in the first embodiment. In this embodiment, the first locking mechanism 130 includes a first connecting seat 131, a second connecting seat 132, and a first locking member 1371. The first connecting seat 131 is pivotally connected to the second connecting seat 132, and the first locking member 1371 is movably disposed between the first connecting seat 131 and the second connecting seat 132 along a first axial direction to restrict or allow their relative pivoting. Referring to Figures 19 to 23, the first connecting seat 131 includes a first pivot portion 1311 and a first connecting portion 1312. The first pivot portion 1311 is generally circular and connected to the first connecting portion 1312. The first connecting portion 1312 has a first through-channel 1313 and is connected to the upper frame 110. The extending direction of the first through-channel 1313 is tangent to the outer peripheral wall of the first pivot portion 1311 (see Figures 21 to 23). Similarly, the second connecting seat 132 includes a second pivot portion 1321 and a second connecting portion 1322. The second pivot portion 1321 is generally circular and connected to the second connecting portion 1322. The second connecting portion 1322 has a second through-channel 1323 and is connected to the lower frame 120. The extending direction of the second through-channel 1323 is tangent to the outer peripheral wall of the second pivot portion 1321 (see Figures 21 to 23). The first pivot portion 1311 and the second pivot portion 1321 are pivotally connected at the first pivot point A1. In this embodiment, when the upper frame 110 is in a relatively extended state relative to the lower frame 120, the first through-channel 1313 and the second through-channel 1323 are arranged approximately along the same straight line, and the ports of the first through-channel 1313 and the second through-channel 1323 are opposite to each other and in close contact (see Figure 21).

[0126] Specifically, the first connecting seat 131 has a generally circular first chamber 1314 on the side facing the second connecting seat 132, and a plurality of first locking grooves 1315 arranged circumferentially on the inner wall of the first chamber 1314 (see Figure 20). The second connecting seat 132 has a generally circular second chamber 1324 on the side facing the first connecting seat 131, and a plurality of second locking grooves 1325 arranged circumferentially on the inside of the second chamber 1324 (see Figure 19). The first locking member 1371 is a gear structure, which has locking teeth 13711. The first locking member 1371 is movably disposed between the first chamber 1314 and the second chamber 1324 along a first axial direction and has a first locking position and a first unlocking position. When the first locking member 1371 is in the first locking position, one end of the first locking member 1371 along the first axial direction is located in the first chamber 1314, and the other end is located in the second chamber 1324. Thus, the locking teeth 13711 outside the first locking member 1371 simultaneously engage the first locking groove 1315 and the second locking groove 1325 along the first axial direction to restrict the first connecting seat 131 from pivoting relative to the second connecting seat 132. When the first locking member 1371 is in the first unlocking position, the first locking member 1371 can be completely moved into the first chamber 1314 or the second chamber 1324, and the locking teeth 13711 correspondingly exit from the second locking groove 1325 or the first locking groove 1315 to allow the first connecting seat 131 to pivot relative to the second connecting seat 132. Specifically, in this embodiment, when the upper frame 110 is held in a relatively unfolded state relative to the lower frame 120, the drift traction member 241 passes through the first through-channel 1313 out of the first connecting seat 131 and directly enters the second through-channel 1323, thus extending through the second connecting seat 132 to the lower frame 120 and the second locking mechanism 230 (see Figure 21). When the first locking member 1371 is in the first unlocking position, the locking teeth 13711 of the first locking member 1371 disengage from the first locking groove 1315, and the first locking member 1371 moves completely into the second chamber 1324. At this time, when the first connecting seat 131 pivots relative to the second connecting seat 132 around the first pivot point A1 to fold the frame 100, the port of the first through-channel 1313 separates from the port of the second through-channel 1323. At this time, the drift traction member 241 that passes through the port of the first through-channel 1313 will bend around the first pivot point A1 along the outer peripheral wall of the first pivot portion 1311 or the outer peripheral wall of the second pivot portion 1321 (switching from Figure 21 to Figure 22 and Figure 23 in sequence), and then pass into the second through-channel 1323.Since the extension direction of the first through-channel 1313 is tangent to the outer peripheral wall of the first pivot 1311, and the extension direction of the second through-channel 1323 is tangent to the outer peripheral wall of the second pivot 1321, when the first connecting seat 131 pivots relative to the second connecting seat 132 around the first pivot point A1 to unfold the frame 100, the tangent structure can guide the drift traction member 241 to automatically recover after bending, that is, guide the drift traction member 241 to automatically recover from the bent arc state to the straight state. The tangent structure can not only avoid the accidental bending of the drift traction member 241, but also avoid problems such as the drift locking mechanism 240 malfunctioning due to the drift traction member 241 not bending smoothly during the unfolding and folding process of the frame 100.

[0127] Referring again to Figures 19 and 20, in this embodiment, the first locking mechanism 130 further includes a second driving member 139, which is movably disposed between the first connecting seat 131 and the second connecting seat 132 and adjacent to the first locking member 1371. The second driving member 139 is adapted to drive the first locking member 1371 to move so that the first locking member 1371 can be fully moved into the second chamber 1324. Specifically, the first traction member 138 connects the second driving member 139 and the first unlocking member 410. Therefore, when the actuating member 460 is in the first position and the operating member 430 is operated, the first traction member 138 drives the first locking member 1371 to move into the second chamber 1324 through the second driving member 139 to complete the unlocking, thus allowing the first connecting seat 131 to pivot relative to the second connecting seat 132.

[0128] It should be noted that, in this embodiment, one end of the second traction member 236 is connected to the outer peripheral wall of the first pivot portion 1311 of the first connecting seat 131, and the other end is connected to the push member 235. When the first connecting seat 131 pivots relative to the second connecting seat 132, one end of the second traction member 236 can rotate together with the outer peripheral wall of the first pivot portion 1311, thereby causing the second traction member 236 to pull the push member 235 to the unlocked position.

[0129] It should also be noted that the operation process of the trolley 1000 in this embodiment is roughly the same as that in the first embodiment, except that the unlocking process of the first locking mechanism 130 is slightly different. Specifically, when the actuating member 460 is in the first position, the operating member 430 pushes against the first linkage member 440 and drives the first unlocking member 410 to rotate around its rotation center. The first unlocking member 410 will drive the first traction member 138 to move, thereby driving the second driving member 139 to move, and then pushing the first locking member 1371 to move completely into the second chamber 1324 to reach the first unlocking position. In this way, the upper handle 110 and the lower handle 120 can pivot relative to each other to fold.

[0130] The fifth embodiment of the present invention also provides a perspective view of a trolley 1000, which is similar to the fourth embodiment described above. Therefore, unless otherwise specified, the structure of the components and the connection relationships between the components in this embodiment can be referred to the description in the fourth embodiment above. The following mainly describes the differences between this embodiment and the fourth embodiment described above.

[0131] Referring to Figures 24 and 25, in this embodiment, the first locking mechanism 130 further includes a cover 135, which is connected to either the first connecting seat 131 or the second connecting seat 132. A passage space 133 is formed between the cover 135 and the first connecting seat 131 or the cover 135 and the second connecting seat 132, and this passage space 133 communicates with the first through channel 1313 and the second through channel 1323. Optionally, the cover 135 is connected to the side of the second connecting seat 132 opposite to the first connecting seat 131, and a passage space 133 is formed between the cover 135 and the second connecting seat 132. Specifically, in this embodiment, the side of the cover 135 facing the second connecting seat 132 has a recessed groove 1351, and this groove 1351 forms a passage space 133 with the second connecting seat 132. The drifting traction member 241 passes through the first through channel 1313, the passage space 133, and the second through channel 1323.

[0132] Referring to Figures 26 and 27, in one embodiment, the second connecting seat 132 has a guide portion 134 protruding from the side facing the cover 135 and / or the side facing the second connecting seat 132 from the cover 135. This guide portion 134 has an arcuate peripheral wall. Therefore, when the first connecting seat 131 pivots relative to the second connecting seat 132, the arcuate peripheral wall of the guide portion 134 can be used to guide the bending of the drift traction member 241.

[0133] It should be noted that in this embodiment, the unlocking principle of the first locking mechanism 130 differs from that in the fourth embodiment. Specifically, in this embodiment, the second driving member 139 and the first traction member 138 are omitted from the first locking mechanism 130. More specifically, the first locking mechanism 130 also includes a push button 141, which is disposed on the side of the first connecting seat 131 opposite to the second connecting seat 132. The push button 141 passes through the first connecting seat 131 along the first axis and abuts against the first locking member 1371. When it is necessary to fold the trolley 1000 or the handlebar 100, the user can push the first locking member 1371 to the first unlocking position by operating (e.g., pushing or pressing) the push button 141.

[0134] Specifically, in this embodiment, as shown in Figures 24 and 25, the first locking mechanism 130 further includes a fourth reset member 142. The fourth reset member 142 can be located between the second connecting seat 132 and the first locking member 1371 along the first axial direction, and is used to provide an elastic restoring force to the first locking member 1371 so that the first locking member 1371 is held in the first locked position. Of course, in other embodiments, the fourth reset member 142 can also be located between the first connecting seat 131 and the first locking member 1371 and be used to provide an elastic restoring force to the first locking member 1371. Specifically, in this embodiment, the fourth reset member 142 is a compression spring, with both ends abutting between the second connecting seat 132 and the first locking member 1371.

[0135] It should be noted that, in this embodiment, the aforementioned push button 141 can be omitted. The unlocking drive method for the first locking member 1371 can adopt the same drive method as in the fourth embodiment, that is, by setting the second drive member 139 to drive the first locking member 1371 to move along the first axis from the first locked position to the first unlocked position, but it is not limited to this. Specifically, regarding the unlocking principle using the second drive member 139, please refer to the description in the fourth embodiment, which will not be repeated here.

[0136] The aforementioned trolley 1000 has at least the following technical effects:

[0137] In the aforementioned trolley 1000, the handlebar 100 includes an upper handlebar 110 and a lower handlebar 120 that are pivotally connected to each other, and the lower handlebar 120 is also pivotally connected to the wheel frame 200. Therefore, when it is necessary to carry or store the trolley 1000, the first locking mechanism 130 and the second locking mechanism 230 can be released by the release operation mechanism 400. In this way, the upper handlebar 110 can be pivotally folded relative to the lower handlebar 120, and the lower handlebar 120 can be pivotally folded relative to the wheel frame 200, so that the trolley 1000 as a whole can be folded in a three-fold manner to obtain a smaller folded volume, which is convenient for storage and transportation, and greatly improves the portability of the trolley 1000. Furthermore, since the trolley 1000 is also equipped with a drift locking mechanism 240, which can be used to restrict or allow the wheel seat 310 to rotate relative to the wheel frame 200, and the release operation mechanism 400 can release the drift locking mechanism 240, the user can allow the wheel seat 310 to rotate relative to the wheel frame 200 by operating the release operation mechanism 400. This gives the trolley 1000 a steering function and improves its maneuverability. In addition, the drift traction member 241, as a component of the drift locking mechanism 240, is cleverly configured within the wheel frame 200 and the handframe 100 of the trolley 1000. This layout also allows the drift traction member 241 to pass through the first locking mechanism 130, thereby achieving control over the drift steering function of the wheel seat 310 and the wheel 320 without affecting the normal folding of the handframe 100. This design ensures that the function of the drift locking mechanism 240 is not affected when the trolley 1000 is folded to a smaller size. Similarly, releasing the drift locking mechanism 240 does not affect the folded or unfolded state of the trolley 1000. Finally, the folded trolley 1000 can remain upright with the combined support of the wheels 320 and the first locking mechanism 130.

[0138] The above design not only optimizes the structure of the trolley 1000, making its appearance neater and more beautiful, but also improves the efficiency of space utilization while maintaining the flexibility of the trolley 1000's operation.

[0139] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A trolley, characterized in that, include: The rider frame includes an upper rider frame, a lower rider frame, and a first locking mechanism, wherein the upper rider frame is pivotally connected to the lower rider frame and the first locking mechanism restricts or allows the two to pivot relative to each other. Second locking mechanism; Drift locking mechanism; Wheel seat, which is connected to the rotating wheel; The wheel frame, the lower handrail is pivotally connected to the wheel frame and the two are restricted or allowed to pivot relative to each other by the second locking mechanism, the wheel frame is rotatably connected to the wheel seat and the wheel seat is restricted or allowed to rotate relative to the wheel frame by the drift locking mechanism; as well as The release mechanism has a first release state and a second release state. When in the first release state, the release mechanism releases the first locking mechanism and / or the second locking mechanism to allow the upper frame to pivot relative to the lower frame, while allowing the lower frame to pivot relative to the wheel frame. When in the second unlocking state, the unlocking mechanism unlocks the drift locking mechanism to allow the wheel seat to rotate relative to the wheel frame.

2. The trolley according to claim 1, characterized in that, The release mechanism includes: A first release element is rotatably mounted on the frame and is drivenly connected to the first locking mechanism to allow the upper frame to pivot relative to the lower frame. A second release element, rotatably mounted on the rider frame, is drivenly connected to the drift locking mechanism to allow the wheel seat to rotate relative to the wheel frame; and An operating element is movably mounted on the rider frame and selectively drives either the first or the second release element to rotate.

3. The trolley according to claim 2, characterized in that, The release mechanism further includes: The first linkage is driven to connect with the first release element; The second linkage is drivenly connected to the second release element; and A toggle member is connected to the first linkage member and the second linkage member respectively. The toggle member is movably mounted on the rider frame and can switch between a first position and a second position to drive the first linkage member and the second linkage member to move along a first direction.

4. The trolley according to claim 3, characterized in that, When the actuating member is in the first position, the operating member is operated to push the first linkage member to move in the second direction, thereby causing the first unlocking member to rotate. When the actuating member is in the second position, the operating member is operated to push the second linkage member to move in the second direction, thereby causing the second release member to rotate. The first direction intersects with the second direction.

5. The trolley according to claim 4, characterized in that, The first locking mechanism includes: The first connecting seat is connected to the upper frame; The second connecting seat is connected to the dismounting frame and pivotally connected to the first connecting seat; A first locking member is movably disposed in one of the first connecting seat and the second connecting seat, the other of the first connecting seat and the second connecting seat having a locking recess, the first locking member being adapted to extend into the locking recess to restrict pivoting of the first connecting seat relative to the second connecting seat; and The first traction member connects the first locking member and the first unlocking member; When the actuating member is in the first position and the operating member is operated, the first traction member drives the first locking member to retract from the locking recess to allow the first connecting seat to pivot relative to the second connecting seat.

6. The trolley according to claim 4, characterized in that, The first locking mechanism includes: The first connecting seat is connected to the upper frame; The second connecting seat is connected to the dismounting frame and pivotally connected to the first connecting seat; A first locking element is movably disposed between the first connecting seat and the second connecting seat along a first axial direction to restrict or allow relative pivoting between the two; A second driving member is movably disposed between the first connecting seat and the second connecting seat and is adjacent to the first locking member; the second driving member is adapted to drive the first locking member to move. The first traction component connects the second driving component and the first release component; When the actuating member is in the first position and the operating member is operated, the first traction member drives the first locking member to release via the second driving member, thereby allowing the first connecting seat to pivot relative to the second connecting seat.

7. The trolley according to claim 5 or 6, characterized in that, The wheel frame includes a front wheel frame and a rear wheel frame; The second locking mechanism includes a second locking member and a first pivot seat, a second pivot seat, and a third pivot seat pivotally connected to each other about a second axis. The second pivot seat is located between the first pivot seat and the third pivot seat along the second axis. The first pivot seat is connected to the lower handframe, the second pivot seat is connected to the front wheel frame, and the third pivot seat is connected to the rear wheel frame. The second locking member is movably disposed between the first pivot seat and the third pivot seat along the second axis to restrict or allow the two to pivot relative to each other.

8. The trolley according to claim 7, characterized in that, The second locking mechanism also includes: A pusher, rotatably disposed between the first pivot and the third pivot and adjacent to the second locking member, the pusher being adapted to drive the second locking member to allow the first pivot and the third pivot to pivot relative to each other; and The second traction component connects the pusher component and the first connecting seat; When the first connecting seat pivots relative to the second connecting seat, the second traction member rotates by means of the rotation of the first connecting seat to drive the push member to rotate, thereby driving the second locking member to move.

9. The trolley according to claim 1, characterized in that, The drift locking mechanism includes a drift locking member and a drift traction member. The drift locking member is movably disposed on the wheel frame and adapted to lock or release the wheel seat. The drift traction member is disposed within the wheel frame and the rider frame. The release operation mechanism is disposed on the upper rider frame. One end of the drift traction member passes through the first locking mechanism and is drivenly connected to the release operation mechanism, and the other end passes through the second locking mechanism and is connected to the drift locking member.

10. The trolley according to claim 9, characterized in that, The wheel seat is provided with a locking recess, which is adapted to engage with the drift locking member; When the release mechanism is operated, the release mechanism drives the drift locking member to retract from the locking recess via the drift traction member.

11. The trolley according to claim 1, characterized in that, When the first locking mechanism is released, the upper handframe can pivot relative to the lower handframe to put the trolley in a folded state, and the wheels are on the same plane as the first locking mechanism and jointly support the trolley.

12. A trolley, characterized in that, include: The rider frame includes an upper rider frame, a lower rider frame, and a first locking mechanism, wherein the upper rider frame is pivotally connected to the lower rider frame and the first locking mechanism restricts or allows the two to pivot relative to each other. Wheel seat; Wheel frame; as well as A drift locking mechanism for restricting or allowing the wheel seat to rotate relative to the wheel frame, the drift locking mechanism having a drift traction member disposed within the wheel frame and the rider frame and passing through the first locking mechanism.

13. The trolley according to claim 12, characterized in that, The first locking mechanism includes: A first connecting seat is connected to the upper frame; and The second connecting seat is connected to the lowering frame and pivotally connected to the first connecting seat, and a through space is formed between the second connecting seat and the first connecting seat, and the drift traction member is inserted into the through space.

14. The trolley according to claim 13, characterized in that, The first connecting seat includes a first pivot part and a first connecting part connected to each other. The first connecting part is connected to the upper frame. The second connecting seat includes a second pivot part and a second connecting part connected to each other. The second connecting part is connected to the lower frame. Both the first pivot part and the second pivot part include two pieces arranged opposite to each other. The two pieces of the first pivot portion and the two pieces of the second pivot portion are arranged alternately and pivotally connected, and the through space can be formed between any two adjacent pieces.

15. The trolley according to claim 14, characterized in that, At least one of the two adjacent sheets is provided with a recess, and the recess forms the through space.

16. The trolley according to claim 14, characterized in that, The sheet body has a guide portion protruding from one side facing the through space. When the first connecting seat pivots relative to the second connecting seat, the guide portion is adapted to guide the drifting traction member to bend.

17. The trolley according to claim 13, characterized in that, The first connecting seat includes a first pivot portion and a first connecting portion connected to each other, and the first connecting portion is connected to the upper frame; The second connecting seat includes a second pivot part and a second connecting part connected to each other, and the second connecting part is connected to the unloading scaffold; One of the first pivot portion and the second pivot portion includes two oppositely arranged plates, and the other of the first pivot portion and the second pivot portion is pivotally connected between the two plates, and a through space can be formed between the first pivot portion and either of the plates.

18. The trolley according to claim 12, characterized in that, The first locking mechanism includes: The first connecting seat is connected to the upper frame; The second connecting seat is connected to the dismount handrail and pivotally connected to the first connecting seat; and The cover is connected to the first connecting seat or the second connecting seat, and a through space is formed between the cover and the first connecting seat or the second connecting seat, and the drifting traction member is inserted into the through space.

19. The trolley according to claim 18, characterized in that, The first connecting seat includes a first pivot part and a first connecting part connected to each other. The first connecting part is connected to the upper frame. The first pivot part includes two pieces arranged opposite to each other. The second connecting seat includes a second pivot portion and a second connecting portion connected to each other. The second connecting portion is connected to the lowering frame. The second pivot portion is pivotally connected between the two pieces. The cover is connected to the side of any piece facing away from the second pivot portion. The cover and the adjacent piece form the passage space.

20. The trolley according to claim 18, characterized in that, The first locking mechanism further includes a first driving member, which passes through the second connecting seat and the first connecting seat and is fixedly connected to the first connecting seat. The first driving member protrudes within the passage space and has an arc-shaped peripheral wall. When the first connecting seat pivots relative to the second connecting seat, the arc-shaped peripheral wall is adapted to guide the drifting traction member to bend.

21. The trolley according to any one of claims 13 to 20, characterized in that, The first connecting seat is provided with a first through-passage, which connects the inner cavity of the upper frame and the through-passage space; The second connecting seat is provided with a second through-channel, which connects the inner cavity of the unloading scaffold and the through-space; One end of the drift traction member passes through the through-space, through the first through-channel, and extends into the inner cavity of the upper frame. The other end of the drift traction member passes through the through-space, through the second through-channel, and extends into the inner cavity of the lower frame.

22. The trolley according to any one of claims 13 to 20, characterized in that, The first locking mechanism further includes: A first locking element is movably disposed on one of the first connecting seat and the second connecting seat; and A locking recess is provided on the other of the first connecting seat and the second connecting seat, and the first locking member is adapted to lock into the locking recess to restrict the first connecting seat from pivoting relative to the second connecting seat.

23. The trolley according to claim 22, characterized in that, The first locking mechanism further includes a first traction member, which is connected to the first locking member; The trolley also includes a release mechanism, which is drivenly connected to the first traction member. When the release mechanism is operated, the first traction member drives the first locking member to retract from the locking recess to release it from the locking recess, thereby allowing the first connecting seat to pivot relative to the second connecting seat.

24. The trolley according to claim 12, characterized in that, The first locking mechanism includes: The first connecting seat has a first through-passage and is connected to the upper frame; The second connecting seat has a second through-passage and is connected to the unloading scaffold; The second connecting seat is pivotally connected to the first connecting seat, the first through-channel is connected to the second through-channel, and the drifting traction member is inserted into the first through-channel and the second through-channel.

25. The trolley according to claim 24, characterized in that, The first connecting seat includes a first pivot portion and a first connecting portion connected to each other. The first connecting portion has a first through-channel and is connected to the upper frame. The extending direction of the first through-channel is tangent to the outer peripheral wall of the first pivot portion; and / or The second connecting seat includes a second pivot portion and a second connecting portion connected together. The second connecting portion has a second through-channel and is connected to the unloading frame. The extending direction of the second through-channel is tangent to the outer peripheral wall of the second pivot portion.

26. The trolley according to claim 24, characterized in that, The first connecting seat includes a first pivot portion, and the second connecting seat includes a second pivot portion. The first pivot portion and the second pivot portion are pivotally connected at a first pivot point. When the first connecting seat pivots relative to the second connecting seat around the first pivot point, the drifting traction member can bend around the first pivot point along the outer peripheral wall of the first pivot portion or the outer peripheral wall of the second pivot portion.

27. The trolley according to claim 24, characterized in that, The first locking mechanism further includes a cover, which is connected to the first connecting seat or the second connecting seat, and the drifting traction member is disposed between the cover and the first connecting seat or the cover and the second connecting seat.

28. The trolley according to claim 27, characterized in that, The first connecting seat or the second connecting seat has a guide portion protruding towards the side of the cover. When the first connecting seat pivots relative to the second connecting seat, the guide portion is adapted to guide the drifting traction member to bend.

29. The trolley according to claim 27, characterized in that, The cover has a guide portion protruding on the side facing the first connecting seat or the second connecting seat. When the first connecting seat pivots relative to the second connecting seat, the guide portion is adapted to guide the drifting traction member to bend.

30. The trolley according to any one of claims 24 to 29, characterized in that, The first connecting seat has a first chamber on the side facing the second connecting seat, and the side wall of the first chamber has a first locking groove. The second connecting seat has a second chamber on the side facing the first connecting seat, and the side wall of the second chamber has a second locking groove. The first locking mechanism further includes a first locking member with locking teeth, the first locking member being movably disposed between the first chamber and the second chamber along a first axial direction and having a first locking position and a first unlocking position; when in the first locking position, the locking teeth simultaneously engage the first locking groove and the second locking groove to restrict the first connecting seat from pivoting relative to the second connecting seat; When in the first unlock position, the locking teeth disengage from the first locking slot or the second locking slot to allow the first connector to pivot relative to the second connector.

31. The trolley according to claim 12, characterized in that, The wheel frame includes a front wheel frame, a rear wheel frame, and a second locking mechanism. The second locking mechanism includes a first pivot seat, a second pivot seat, and a third pivot seat that are pivotally connected to each other about a second axis. The second pivot seat is located between the first pivot seat and the third pivot seat along the second axis. The first pivot seat is connected to the lower handrail, the second pivot seat is connected to the front wheel frame, and the third pivot seat is connected to the rear wheel frame.

32. The trolley according to claim 31, characterized in that, The first pivot seat has a movable channel, and the drift traction member passes through the first locking mechanism and the movable channel and extends into the inner cavity of the rear wheel frame.

33. The trolley according to claim 31, characterized in that, The second locking mechanism also includes: A second locking member is movably disposed between the first pivot seat and the third pivot seat along the second axial direction and has a second locking position and a second unlocking position; and A pusher is rotatably disposed between the first pivot and the third pivot along the second axis and adjacent to the second locking member. The pusher is adapted to drive the second locking member to move from the second locking position to the second unlocking position. When in the second locked position, the first pivot and the third pivot are relatively fixed; when in the second unlocked position, the first pivot can pivot relative to the third pivot.

34. The trolley according to claim 33, characterized in that, The first locking mechanism includes a first connecting seat and a second connecting seat pivotally connected to each other on a first pivot. The first pivot restricts the separation of the first connecting seat and the second connecting seat along a first axial direction. The first connecting seat is connected to the upper frame, and the second connecting seat is connected to the lower frame.

35. The trolley according to claim 34, characterized in that, The first locking mechanism further includes a first driving member, which is fixedly connected to the first connecting seat and coaxially arranged with the first pivot. The second locking mechanism further includes a second traction member connected between the push member and the first drive member or the push member and the first connecting seat. When the first connecting seat pivots relative to the second connecting seat, the second traction member drives the push member to rotate by rotating the first drive member or the first connecting seat about the first pivot.

36. The trolley according to claim 12, characterized in that, The drift locking mechanism further includes a drift locking member and a locking recess. The wheel seat is provided with the locking recess. The drift locking member is movably disposed on the wheel frame and adapted to cooperate with the locking recess to restrict the rotation of the wheel seat. The drift traction member is connected to the drift locking member.

37. The trolley according to claim 36, characterized in that, The trolley also includes a release mechanism, which is located on the upper frame and drivenly connected to the drift traction member. When the release mechanism is operated, it causes the drift locking member to retract from the locking recess to release the lock from the locking recess, thereby allowing the wheel seat to rotate relative to the wheel frame.

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