Carrier vehicle, folding mechanism

Abstract

This invention provides a vehicle and its folding mechanism and wheel mechanism. The vehicle frame includes a rear leg and a handlebar. The folding mechanism includes a handlebar fixing rod pivotally connected to the rear leg. The handlebar is connected to the handlebar fixing rod such that the handlebar can pivot synchronously with the handlebar fixing rod. The handlebar fixing rod is provided with a fixing rod locking member, which is movable between a locked position and an unlocked position. When the fixing rod locking member moves to the locked position, it locks onto the rear leg to prevent the handlebar fixing rod from pivoting relative to the rear leg. When the fixing rod locking member moves to the unlocked position, it unlocks relative to the rear leg, allowing the handlebar fixing rod to pivot relative to the rear leg. The vehicle according to this invention is easy to fold and has a small folded size.

Description

Technical Field

[0001] This invention relates to a vehicle, and more specifically, to a vehicle frame retraction mechanism and a wheel mechanism. Prior Technology

[0002] Currently, the use of transport vehicles such as strollers and trailers is becoming increasingly popular. These vehicles can be used to transport people, animals, or goods, including but not limited to strollers and animal or goods transport devices. Transport vehicles are convenient for users to take children out and carry various items. However, common transport vehicles have complex structures, are large and cumbersome, due to their frame structure. Therefore, there is a need for a transport vehicle that is easy to fold and has a smaller size when folded, making it convenient for users to carry and use when out and about. Summary of the Invention

[0003] The purpose of this invention is to provide a transport vehicle and its folding mechanism, canopy device, handlebar mechanism and wheel mechanism, wherein the transport vehicle is easy to fold and has a small volume after folding.

[0004] As embodied and summarized herein, in order to achieve these and other advantages and for the purposes of the invention, a retraction mechanism for a vehicle frame is proposed, wherein the frame includes a rear leg and a handlebar, the retraction mechanism includes a handlebar retaining rod pivotally connected to the rear leg, the handlebar being connected to the handlebar retaining rod such that the handlebar can pivot synchronously with the handlebar retaining rod, wherein the handlebar retaining rod is provided with a retaining rod locking member, the retaining rod locking member being movable between a locked position and an unlocked position; when the retaining rod locking member moves to the locked position, the retaining rod locking member is locked to the rear leg to prevent the handlebar retaining rod from pivoting relative to the rear leg; when the retaining rod locking member moves to the unlocked position, the retaining rod locking member is unlocked relative to the rear leg to allow the handlebar retaining rod to pivot relative to the rear leg.

[0005] In one embodiment, the fixing rod locking member is located in the handlebar fixing rod and is movable along the handlebar fixing rod between a locked position and an unlocked position. The rear foot is provided with a rear foot locking hole at the part where it is pivotally connected to the handlebar fixing rod. When the fixing rod locking member moves to the locked position, the fixing rod locking member is inserted into the rear foot locking hole; when the fixing rod locking member moves to the unlocked position, the fixing rod locking member is disengaged from the rear foot locking hole.

[0006] In one embodiment, the retraction mechanism further includes a handlebar slide that is movable along the handlebar, the handlebar slide being able to drive the fixed rod locking member to the unlock position via a slide drive assembly.

[0007] In one embodiment, the sliding sleeve transmission element includes: a handlebar drive member configured to move along the handlebar; a handlebar traction member, a first end of which is connected to the handlebar sliding sleeve, and a second end of which is connected to the handlebar drive member, such that movement of the handlebar sliding sleeve can drive the handlebar drive member from an initial position to a driving position; wherein the handlebar drive member has a drive member pushing portion, the drive member pushing portion interacting with a locking member pushing portion disposed on the fixed rod locking member, such that the handlebar drive member can drive the fixed rod locking member to move to the unlocking position.

[0008] In one embodiment, the handlebar has a drive member slot extending along the length of the handlebar, a drive member fixing pin is configured to pass through the handlebar drive member and the drive member slot, and the second end of the handlebar traction member is connected to the drive member fixing pin.

[0009] In one embodiment, the retraction mechanism includes a drive element reset device configured to tend to move the handlebar drive element to the initial position.

[0010] In another embodiment, the present invention proposes a canopy device for a vehicle frame, wherein the canopy device includes: a canopy rod for supporting the canopy, the canopy rod including a movable canopy rod and a horizontally arranged fixed canopy rod, a canopy mounting seat, a rod slot provided on one side of the canopy mounting seat, the end of the fixed canopy rod being fixed in the rod slot, the end of the movable canopy rod being pivotally connected to the other side of the canopy mounting seat, and the canopy mounting seat being detachably fixed to the vehicle frame.

[0011] In one embodiment, the canopy mounting bracket is provided with a canopy joint, and the frame is provided with a frame joint, wherein the canopy joint and the frame joint can be engaged with each other.

[0012] In one embodiment, the roof joint and the frame joint are mating grooves.

[0013] In one embodiment, the roof joint is provided with a roof elastic portion capable of applying pressure to the frame joint.

[0014] In one embodiment, one of the canopy elastic portion and the frame joint portion is provided with a joint recess, and the other is provided with a joint protrusion capable of engaging with the joint recess.

[0015] In another embodiment, the present invention proposes a handlebar mechanism for a vehicle frame, wherein the frame includes a rear leg and a handlebar, the handlebar mechanism includes a handlebar fixing rod, the handlebar fixing rod being pivotally connected to the rear leg, wherein the handlebar and the handlebar fixing rod are connected such that the handlebar can pivot synchronously with the handlebar fixing rod or the handlebar can pivot relative to the handlebar fixing rod.

[0016] In one embodiment, the handlebar is provided with a handlebar fixing member, which is movable along the handlebar between an engaged position and a disengaged position. When the handlebar fixing member moves to the engaged position, the handlebar locking portion of the handlebar fixing member engages with the free end of the handlebar fixing rod, so that the handlebar can pivot synchronously with the handlebar fixing rod. When the handlebar fixing member moves to the disengaged position, the handlebar locking portion of the handlebar fixing member disengages from the free end of the handlebar fixing rod, so that the handlebar can pivot relative to the handlebar fixing rod.

[0017] In one embodiment, the handlebar has a retaining groove extending along the length of the handlebar, a retaining connecting pin is configured to pass through the handlebar retaining member and the retaining groove, and wherein the handlebar mechanism includes a retaining member resetting device configured to tend to move the handlebar retaining member to the engagement position.

[0018] In one embodiment, the rear foot is provided with a rear foot connecting seat for pivoting the pivot end of the handlebar to be pivotally connected thereto, and the rear foot connecting seat is provided with a handlebar pivot limiting part for limiting the pivot angle of the pivot end of the handlebar.

[0019] In another embodiment, the present invention proposes a wheel mechanism for a vehicle frame, wherein the frame includes front legs, rear legs, and wheels, and the wheel mechanism includes: a wheel seat, the wheel seat being steerably connected to the front leg or the rear leg, the wheel being connected to the wheel seat and capable of steer synchronously with the wheel seat, the wheel seat being provided with a wheel steering positioning member, and the front leg and / or the rear leg corresponding to the wheel seat being provided with at least two wheel steering positioning holes, wherein the wheel steering positioning member can be operated to move between a directional position and a non-directional position; when the wheel steering positioning member moves to the directional position, the wheel steering positioning member can be inserted into one of the wheel steering positioning holes to orient the wheel; when the wheel steering positioning member moves to the non-directional position, the wheel steering positioning member retracts from the wheel steering positioning hole to allow the wheel to steer.

[0020] In one embodiment, the wheel mechanism includes a directional element receptacle movably disposed on the wheel seat, and the wheel steering positioning element is disposed on the directional element receptacle and moves with the directional element receptacle.

[0021] In one embodiment, the wheel mechanism includes a wheel orientation actuator configured to be operable to move the orientation actuator receiving seat.

[0022] In one embodiment, the frame includes at least one of a front undertube pivotally connected to the front leg and a rear undertube pivotally connected to the rear leg, wherein the front undertube and / or the rear undertube are configured to pivot during frame folding and to drive the wheel steering locator to the non-directional position.

[0023] In one embodiment, the first end of the front undertube is pivotally connected to the front foot, the first end of the rear undertube is pivotally connected to the rear foot, at least one of the first ends of the front undertube and the rear undertube is provided with an undertube drive unit, and the front foot and / or the rear foot is provided with an undertube transmission element. By pivoting the front undertube and / or the rear undertube, the undertube drive unit can drive the wheel steering positioning member to move to the non-directional position via the undertube transmission assembly.

[0024] In one embodiment, the undertube drive element is disposed within the wheel seat and includes a first drive member abutting against the undertube drive portion and a second drive member abutting against the wheel steering positioning member. The first drive member abuts against the second drive member, such that the force of the undertube drive portion is transmitted to the wheel steering positioning member via the first drive member and the second drive member.

[0025] In one embodiment, the first end of the front bottom tube is pivotally connected to the front foot, and the first end of the rear bottom tube is pivotally connected to the rear foot. At least one of the first ends of the front bottom tube and the rear bottom tube is provided with a bottom tube pushing part, and the wheel seat is provided with a wheel seat driven part. By pivoting the front bottom tube and / or the rear bottom tube during the retraction of the frame, the bottom tube pushing part can push the wheel seat driven part, thereby driving the wheel seat to turn to the retraction orientation.

[0026] In another embodiment, the present invention proposes a transport vehicle whose frame includes: a frame base; a front leg comprising an upper part and a lower part of the front leg pivotally connected to each other via a front leg pivot; a rear leg comprising an upper part and a lower part of the rear leg pivotally connected to each other via a rear leg pivot, the upper part of the rear leg and the upper part of the front leg being pivotally connected to the frame base via a first frame pivot; and a front undertube pivotally connected to the lower part of the front leg via a front undertube pivot and via a second frame pivot. The pivot is pivotally connected to the frame base, the rear bottom tube, the rear bottom tube is pivotally connected to the lower part of the rear foot via the rear bottom tube pivot, and is pivotally connected to the frame base via the third frame pivot. The sequential connection of the first frame pivot, the rear foot pivot, the rear bottom tube pivot and the third frame pivot can form a first polygon, and the sequential connection of the first frame pivot, the front foot pivot, the front bottom tube pivot and the second frame pivot can form a second polygon.

[0027] In one embodiment, the vehicle frame further includes: a frame slider movably disposed on the frame base in a vertical direction; a first connector pivotally connected to the upper part of the rear leg via a first connector pivot axis; and a second connector pivotally connected to the upper part of the front leg via a second connector pivot axis. The second connector and the first connector are pivotally connected to the frame slider via a slider pivot axis, wherein the sequential lines connecting the first frame pivot axis, the first connector pivot axis, the slider pivot axis, and the second connector pivot axis can form a third polygon.

[0028] In one embodiment, the vehicle frame further includes: a handlebar, which is pivotally connected to the upper part of the rear foot via a handlebar pivot axis; a support member, which is pivotally connected to the handlebar via a support pivot axis and to the base of the frame via a second frame pivot axis, wherein the sequential connection of the first frame pivot axis, the second frame pivot axis, the support pivot axis and the handlebar pivot axis can form a fourth polygon.

[0029] In one embodiment, the vehicle frame further includes: a folding mechanism as described above, and / or a canopy device, and / or a handlebar mechanism, and / or a wheel mechanism.

[0030] In another embodiment, the present invention proposes a vehicle whose frame includes the aforementioned folding mechanism, and / or canopy device, and / or handlebar mechanism, and / or wheel mechanism.

[0031] The beneficial effect of the present invention is that the carrier according to the present invention is easy to fold and has a small volume after folding.

[0032] The foregoing and other objects, features, aspects and advantages of the invention will become more apparent from the following detailed description of the invention taken in conjunction with the accompanying drawings. Simple Explanation of the Diagram

[0033] The accompanying drawings are included herein to provide a further understanding of the invention and are incorporated in and form a part of this specification. The drawings illustrate embodiments of the invention and, together with the following description, serve to illustrate the concept of the invention. In the attached diagram: Figure 1 is a perspective view of the vehicle frame of the carrier according to the present invention in an unfolded state. Figure 2 is a side view of the frame of the vehicle according to the present invention in a retracted state. Figure 3 is a perspective view of the frame of the vehicle according to the present invention in a retracted state. Figure 4 is a side view of the vehicle frame of the vehicle according to the present invention in the unfolded state, wherein the movable canopy rod 511 of the canopy device is in the upright position. Figure 5 is a side view of the vehicle frame of the vehicle according to the present invention in the unfolded state, wherein the movable canopy rod 511 of the canopy device is in a horizontal position. Figure 6 is a perspective view of a vehicle frame equipped with a folding mechanism according to the present invention. Figure 7A is a perspective view of a vehicle frame equipped with a retraction mechanism according to the present invention from another angle. Figure 7B is a partially enlarged view of Figure 7A. Figure 8A is a partial exploded view of the frame shown in Figure 7A. Figure 8B is a partially enlarged view of Figure 8A. Figure 9 is a perspective view and an enlarged view of a portion of the frame equipped with the folding mechanism according to the present invention, cut open. Figure 10 is a perspective view and an enlarged view of the cut-out portion of a frame equipped with a folding mechanism according to the present invention. Figure 11 is a perspective view and an enlarged view of a portion of a frame equipped with a retraction mechanism according to the present invention, wherein the fixing rod locking member is in the locked position. Figure 12 is a perspective view and an enlarged view of a portion of a frame equipped with a retraction mechanism according to the present invention, wherein the fixing rod locking member is in the unlocked position. Figure 13 is a perspective view of the part of the handlebar provided with the retraction mechanism according to the present invention, cut open. Figure 14 is a side view of the frame of the vehicle according to the present invention in an unfolded state, showing the various components of the frame and their pivot axes. Figure 15 is a side view of the frame of the vehicle according to the present invention in the form of a folded-up frame, showing the various components of the frame and their pivot axes. Figure 16 is a side view of the frame of the vehicle according to the invention further retracted, showing the various components of the frame and their pivot axes. Figure 17 is a perspective view of the vehicle frame of the vehicle according to the present invention in an unfolded state, showing the frame slider located in the base groove. Figure 18 is a perspective view and a partially enlarged view of the canopy device according to the present invention. Figure 19 is a perspective view of a vehicle frame equipped with a canopy device according to the present invention, wherein an enlarged view of the connection between the canopy device and the vehicle frame is shown. Figure 20 is a side view of a frame equipped with a handlebar mechanism according to the invention, showing the handlebar in push mode. Figure 21 is a side view of a vehicle frame equipped with a handlebar mechanism according to the invention, showing the handlebar in trailer mode. Figure 22 is a perspective view of a bicycle frame equipped with a handlebar mechanism according to the present invention, wherein the handlebar locking part of the handlebar fixing member is engaged with the free end of the handlebar fixing rod. Figure 23 is a perspective view of a bicycle frame equipped with a handlebar mechanism according to the present invention, wherein the handlebar locking part of the handlebar fixing member is disengaged from the free end of the handlebar fixing rod. Figure 24 is a perspective view of a bicycle frame with a handlebar mechanism according to the present invention from another angle, wherein the handlebar locking part of the handlebar fixing member is engaged with the free end of the handlebar fixing rod. Figure 25A is a partially exploded perspective view of a frame equipped with a handlebar mechanism according to the present invention from another angle. Figure 25B is a partially enlarged view of Figure 25A. Figure 26A is a perspective view of a portion of a frame equipped with a handlebar mechanism according to the present invention, cut open. Figure 26B is a partially enlarged view of Figure 26A. Figure 27A is an exploded perspective view of a portion of a frame equipped with a handlebar mechanism according to the present invention. Figure 27B is a partially enlarged view of Figure 27A. Figure 28 is a perspective view of a vehicle frame with a wheel mechanism according to the present invention in an unfolded state. Figure 29 is a side view of a frame equipped with a wheel mechanism according to the present invention in a retracted state. Figure 30 is a perspective view of a vehicle frame equipped with a wheel mechanism according to the present invention in a retracted state. Figure 31 is a perspective view of the chassis shown in Figure 28, in which the roof assembly has been removed. Figure 32 is a side view of the chassis shown in Figure 31. Figure 33 is a side view of the frame shown in Figure 31 in the folding position, with both wheels in the unfolded orientation. Figure 34 is a side view of the frame shown in Figure 31 further folded up, with one wheel in the unfolded orientation and one wheel in the folded orientation. Figure 35 is a side view of the frame shown in Figure 31 in the folded state, where both wheels are in the folded orientation. Figure 36 is a perspective view of some components of a frame equipped with a wheel mechanism according to the present invention. Figure 37 is a partially exploded perspective view of the wheel seat connecting the wheel according to the wheel mechanism of the present invention. Figure 38 is a perspective view of the wheel operation knob of the wheel mechanism according to the present invention. Figure 39 is a partially exploded perspective view of the wheel seat connecting the wheel according to the wheel mechanism of the present invention, wherein the wheel seat connecting housing is removed. Figure 40 is a partial cross-sectional view of the wheel seat connecting the wheel according to the wheel mechanism of the present invention. Figure 41 is a perspective view of a wheel seat connecting a wheel according to the wheel mechanism of the present invention, wherein the wheel steering positioning member is located in a non-directional position. Figure 42 is a perspective view of a wheel seat connecting a wheel according to the wheel mechanism of the present invention, wherein the wheel steering positioning member is located in an oriented position. Figure 43 is a side sectional view of the wheel seat connecting the wheel according to the wheel mechanism of the present invention, wherein the wheel steering positioning member is located in a non-directional position. Figure 44 is a side sectional view of the wheel seat of the wheel mechanism according to the present invention, wherein the wheel steering positioning member is located in the orientation position. Figure 45A is a perspective view of a frame equipped with a wheel mechanism according to the present invention, wherein the undertube drive unit abuts against the first transmission member. Figure 45B is a partially enlarged view of Figure 45A. Figure 46A is a partially exploded perspective view of the frame shown in Figure 45A, in which the lower part of the front foot has been removed. Figure 46B is a partially enlarged view of Figure 46A, in which the wheel steering positioning component is located in the orientation position. Figure 47A is a perspective view of a frame equipped with a wheel mechanism according to the present invention, wherein the undertube drive unit pushes against the first transmission member. Figure 47B is a partially enlarged view of Figure 47A. Figure 48A is a partially exploded perspective view of the frame shown in Figure 47A, in which the lower part of the front foot has been removed. Figure 48B is a partially enlarged view of Figure 48A, in which the wheel steering alignment component is located in a non-directional position. Figure 49A is a partially exploded perspective view of the frame shown in Figure 47A from another angle, in which the lower part of the front foot has been removed. Figure 49B is a partially enlarged view of Figure 49A, in which the wheel steering alignment component is located in a non-directional position. Figure 50 is a perspective view of the first transmission member of the wheel mechanism according to the present invention. Figure 51 is a perspective view of the second transmission member of the wheel mechanism according to the present invention. Figure 52A is a perspective view of a vehicle frame equipped with a wheel mechanism according to the present invention, wherein the bottom tube pusher is prepared to push the wheel seat driven part. Figure 52B is a partially enlarged view of Figure 52A. Figure 53A is a perspective view of a vehicle frame equipped with a wheel mechanism according to the present invention, wherein the bottom tube pusher pushes the wheel seat driven part. Figure 53B is a partially enlarged view of Figure 53A. Implementation

[0034] Exemplary embodiments will be described in detail below with reference to the accompanying drawings. Although the invention is readily adaptable to various modifications and alternatives, specific embodiments thereof are illustrated by way of example in the drawings. However, the invention should not be construed as limited to the embodiments set forth herein; rather, the invention will encompass all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.

[0035] Typically, the frame 1 of a transport vehicle may include a rear leg 100 and a front leg 200 respectively connected to wheels 600, and a handlebar 300 connected to the rear leg 100. The handlebar 300 allows the user to push and pull the transport vehicle for movement.

[0036] For ease of description, as shown in Figures 1 to 6, this paper takes a vehicle frame 1 with four wheels 600 as an example. However, the present invention is also applicable to vehicle frames 1 with two, three, or more than four wheels 600.

[0037] Meanwhile, this paper defines the direction in which the frame 1 is pushed (i.e., the left direction in Figure 4) as forward, the direction in which the frame 1 is dragged (i.e., the right direction in Figure 4) as backward, and the left and right directions perpendicular to the forward and backward directions as lateral. Since the frame 1 is symmetrical about the left and right sides along the lateral direction, for clarity, the following description mainly focuses on the structure of the lateral side of the frame 1.

[0038] The retraction mechanism of the frame

[0039] To enable the vehicle to be folded for carrying, the handlebar 300 can be designed to pivotally onto the rear leg 100. When the frame 1 is in the extended state, the handlebar 300 is locked relative to the rear leg 100 and cannot pivot, allowing the user to push the vehicle using the handlebar 300. When preparing to fold the frame 1, the handlebar 300 is unlocked relative to the rear leg 100 and can pivot to fold the frame 1. Additionally, for greater convenience, when the frame 1 is in the extended state, the user may also need the handlebar 300 to be unlocked relative to the handlebar fixing rod 400 and pivot, thereby switching the handlebar 300 from push mode (as shown in Figure 20) to trailer mode (as shown in Figure 21, which will be detailed later).

[0040] The retraction mechanism of the vehicle frame 1 of the present invention can well meet the above requirements.

[0041] Figures 1 to 13 show an embodiment of the folding mechanism of the vehicle frame 1 of the vehicle according to the present invention.

[0042] The frame 1 may include a rear leg 100 and a handlebar 300. The folding mechanism includes a handlebar fixing rod 400, which is pivotally connected to the rear leg 100. The handlebar 300 is connected to the handlebar fixing rod 400 such that when the frame 1 is folded, the handlebar 300 can pivot synchronously with the handlebar fixing rod 400.

[0043] In this invention, "synchronous pivoting" of the handlebar 300 and the handlebar fixing rod 400 means that they are arranged side by side and fixed relative to each other, with the handlebar 300 pivoting along with the handlebar fixing rod 400. In the embodiments shown in Figures 20 to 25B, the handlebar 300 and the handlebar fixing rod 400 can pivot around the same handlebar pivot axis S11. In other embodiments, the pivot axis of the handlebar 300 can be located on the handlebar fixing rod 400 and offset from the pivot axis of the handlebar fixing rod 400.

[0044] By setting a handlebar fixing rod 400, and the handlebar 300 being able to pivot synchronously or asynchronously with the handlebar fixing rod 400, the handlebar 300 can switch between multiple working states relative to the rear foot 100.

[0045] For example, when the handlebar 300 and the handlebar fixing rod 400 pivot synchronously, if the handlebar fixing rod 400 is locked relative to the rear foot 100 and cannot pivot, the handlebar 300 will also remain in the push mode (as shown in Figure 1) after the handlebar fixing rod 400 is locked relative to the rear foot 100. This is beneficial for the user to push the vehicle using the handlebar 300. If the handlebar fixing rod 400 is unlocked relative to the rear foot 100 and can pivot, the handlebar 300 will also pivot to the folded state (as shown in Figures 2 and 3) after the handlebar fixing rod 400 is unlocked relative to the rear foot 100. This is beneficial for the user to fold the frame 1.

[0046] When the handlebar 300 and the handlebar fixing rod 400 no longer pivot synchronously, even if the handlebar fixing rod 400 is locked relative to the rear foot 100 and cannot pivot, the handlebar 300 can still pivot relative to the rear foot 100 to a suitable angle position for the trailer (as shown in Figure 21), which is beneficial for the user to tow the transport vehicle by using the handlebar 300.

[0047] In order to lock or unlock the pivot of the handlebar fixing rod 400 relative to the rear foot 100, as shown in Figures 11 and 12, the handlebar fixing rod 400 is provided with a fixing rod locking member 410, which can move between a locked position and an unlocked position.

[0048] As shown in Figure 11, when the fixing rod locking member 410 moves to the locking position, the fixing rod locking member 410 locks onto the rear foot 100 to prevent the handlebar fixing rod 400 from pivoting relative to the rear foot 100. At this time, the frame 1 can remain in the unfolded state or other use state.

[0049] In one embodiment, the fixing rod locking member 410 can be configured such that when the handlebar fixing rod 400 is pivoted relative to the rear foot 100 to an angle position that puts the frame 1 in the unfolded state, the fixing rod locking member 410 can move to the locking position to keep the frame 1 in the unfolded state.

[0050] In another embodiment, the retaining rod locking member 410 may be configured such that when the handlebar retaining rod 400 pivots relative to the rear foot 100 to another angular position where the frame 1 is not in the extended state (e.g., the frame 1 is in the folded state), the retaining rod locking member 410 can move to a locked position to keep the frame 1 in a different use state (e.g., the folded state).

[0051] As shown in Figure 12, when the fixing rod locking member 410 moves to the unlocking position, the fixing rod locking member 410 unlocks relative to the rear foot 100, allowing the handlebar fixing rod 400 to pivot relative to the rear foot 100, thereby allowing the frame 1 to change its usage state (e.g., to the folded state).

[0052] In the embodiments shown in Figures 11 and 12, the fixing rod locking member 410 located within the handlebar fixing rod 400 is movable along the handlebar fixing rod 400 between a locked position and an unlocked position. A rear foot locking hole 110 is provided at the portion of the rear foot 100 where the handlebar fixing rod 400 is pivotally connected. When the fixing rod locking member 410 moves to the locked position and inserts into the rear foot locking hole 110, the fixing rod locking member 410 is locked onto the rear foot 100. When the fixing rod locking member 410 moves to the unlocked position and exits the rear foot locking hole 110, the fixing rod locking member 410 is unlocked relative to the rear foot 100.

[0053] In other embodiments, the locking member 410 of the handlebar fixing rod according to the invention can also be locked and unlocked relative to the rear foot 100 in other ways. For example, the locking member 410 can be configured to extend or retract into the pivot end of the handlebar fixing rod 400 in a direction perpendicular to the length direction of the handlebar fixing rod 400 (i.e., the extension direction of the handlebar fixing rod 400). When the locking member 410 extends from the pivot end of the handlebar fixing rod 400, it can abut against the outer wall of the rear foot 100, thereby locking the handlebar fixing rod 400 relative to the rear foot 100 and preventing it from pivoting. When the locking member 410 retracts into the pivot end of the handlebar fixing rod 400, the handlebar fixing rod 400 is unlocked relative to the rear foot 100 and can pivot.

[0054] To ensure that the locking member 410 will not be accidentally released after being locked to the rear foot 100, as shown in Figures 11 and 12, the closing mechanism according to the invention may further include a locking member reset device 412, which is configured to tend to move the locking member 410 to the locked position.

[0055] The locking reset device 412 can be an elastic element such as a spring, pneumatic rod or hydraulic rod.

[0056] When the user is ready to fold up the frame 1, the handlebar fixing rod 400 needs to be released relative to the rear foot 100 so that it can pivot. In order to facilitate the user's operation, the folding mechanism according to the present invention may also include a release operation part provided on the frame 1, which can be operated to drive the fixing rod locking member 410 to the release position.

[0057] In the embodiments shown in Figures 1 to 13, the unlocking operation unit is a handlebar slide 310 that can move along the handlebar 300. The handlebar slide 310 is provided on the handlebar 300, allowing the user to easily perform the unlocking operation without bending over.

[0058] The handlebar sleeve 310 can be a sleeve that fits onto the handlebar 300, or it can be another structure with a groove that engages with the handlebar 300.

[0059] Since the handlebar slide 310 on the handlebar 300 is a distance away from the fixed rod locking member 410 located at the pivot end of the handlebar fixing rod 400, the handlebar slide 310 needs to indirectly drive the fixed rod locking member 410 to the unlock position via the slide transmission element.

[0060] In the embodiments shown in Figures 7A to 10, the sliding sleeve transmission element may include a handlebar drive 320 and a handlebar traction 330.

[0061] The handlebar drive 320 is configured to move along the handlebar 300. The handlebar drive 320 may be a sleeve fitted onto the handlebar 300, or it may be another structure with a groove that engages with the handlebar 300.

[0062] As shown in Figures 9 and 10, the first end 331 of the handlebar traction member 330 is connected to the handlebar slide 310, and the second end 332 is connected to the handlebar drive member 320, so that the movement of the handlebar slide 310 can drive the handlebar drive member 320 to move from the initial position to the drive position.

[0063] The handlebar towing component 330 can use a flexible towing cable such as steel wire, or a rigid towing bar.

[0064] As shown in Figures 8B and 13, the handlebar drive 320 is provided with a drive pusher 321, which interacts with the locking pusher 411 provided on the fixing rod locking member 410, so that the handlebar drive 320 can drive the fixing rod locking member 410 to move to the unlock position.

[0065] In one embodiment, the drive pusher 321 may be disposed on the side of the handlebar drive member 320 facing the handlebar fixing rod 400 to interact with the locking pusher 411. The locking pusher 411 may be integrally formed with the fixing rod locking member 410 or separately formed and connected to the fixing rod locking member 410. When the fixing rod locking member 410 is located inside the handlebar fixing rod 400, the locking pusher 411 disposed on the fixing rod locking member 410 may protrude through the wall of the handlebar fixing rod 400.

[0066] To control the travel distance of the handlebar slide 310 along the handlebar 300, as shown in Figure 9, the handlebar 300 is provided with a slide groove 311 extending along its length. A slide fixing pin 312 is configured to pass through the handlebar slide 310 and the slide groove 311. Therefore, the travel distance of the slide fixing pin 312 within the slide groove 311 is the travel distance of the handlebar slide 310 along the handlebar 300.

[0067] It should be noted that the entire handlebar 300 shown in the figure is U-shaped, and the "length direction of the handlebar 300" mentioned in this article refers to the extension direction of the straight part of the handlebar 300 that is perpendicular to the lateral direction.

[0068] As shown in Figure 9, the first end 331 of the handlebar traction member 330 can be connected to the sliding sleeve fixing pin 312, so that when the handlebar sliding sleeve 310 drives the sliding sleeve fixing pin 312 to move, the sliding sleeve fixing pin 312 drives the handlebar traction member 330 to move.

[0069] Similarly, to control the travel distance of the handlebar drive member 320 along the handlebar 300, as shown in Figure 10, the handlebar 300 is provided with a drive member elongated groove 322 extending along its length direction, and a drive member fixing pin 323 is configured to pass through the handlebar drive member 320 and the drive member elongated groove 322. Thus, the travel distance of the drive member fixing pin 323 within the drive member elongated groove 322 is the travel distance of the handlebar drive member 320 along the handlebar 300.

[0070] As shown in Figure 10, the second end 332 of the handlebar traction member 330 can be connected to the drive member fixing pin 323, so that when the handlebar traction member 330 drives the drive member fixing pin 323 to move, the drive member fixing pin 323 drives the handlebar drive member 320 to move.

[0071] The travel distance of the sliding sleeve retaining pin 312 within the sliding sleeve long groove 311 (i.e., the length of the sliding sleeve long groove 311 along the length of the handlebar 300) should be greater than or equal to the travel distance of the drive member retaining pin 323 within the drive member long groove 322 (i.e., the length of the drive member long groove 322 along the length of the handlebar 300), so that the movement of the handlebar sliding sleeve 310 is sufficient to drive the handlebar drive member 320 to the drive position, thereby driving the fixing rod locking member 410 to the release position.

[0072] To prevent the handlebar drive member 320 from remaining in the drive position and causing the locking member 410 to remain in the unlocked position due to the action of the drive member push part 321 on the locking member push part 411, thus preventing the locking member 410 from being unable to lock onto the rear foot 100, the handlebar drive member 320 needs to be able to return to its initial position. As shown in FIG10, the retraction mechanism according to the present invention may include a drive member reset device 324, which is configured to tend to move the handlebar drive member 320 to the initial position, so that the handlebar drive member 320 can automatically return to the initial position without user operation.

[0073] In the embodiment shown in Figure 10, the drive component reset device 324 can be a tension spring disposed within the handlebar 300, with one end connected to the inner wall of the handlebar 300 and the other end connected to the drive component fixing pin 323. Of course, the drive component reset device 324 can also be other elastic components such as compression springs, torsion springs, pneumatic rods, or hydraulic rods.

[0074] When the user prepares to close the frame 1, they can operate the handlebar slide 310 on the handlebar 300, causing it to move upward along the handlebar 300. The handlebar slide 310 then drives the handlebar drive member 320 from the initial position to the drive position via the handlebar traction member 330. During this process, the drive member push part 321 of the handlebar drive member 320 applies a force to the locking member push part 411 provided on the fixing rod locking member 410, causing the fixing rod locking member 410 to move to the unlocked position. That is, the fixing rod locking member 410 unlocks relative to the rear foot 100, which allows the handlebar fixing rod 400 to unlock relative to the rear foot 100 and pivot, thereby causing the handlebar 300, which pivots synchronously with the handlebar fixing rod 400, to also pivot to the closed position as the handlebar fixing rod 400 unlocks relative to the rear foot 100.

[0075] Canopy installation

[0076] In the use of transport vehicles, canopy devices such as sunshades are often used to provide a better transport environment for the people or goods being transported in the vehicle.

[0077] Figures 18 and 19 illustrate one embodiment of a roof device 500 for a vehicle frame according to the present invention.

[0078] As shown in Figure 18, the canopy device 500 according to the present invention includes a canopy rod 510 for supporting a canopy 530. The canopy 530 can be made of a flexible material such as fabric and can have a sun protection effect.

[0079] The canopy pole 510 may include a movable canopy pole 511 and a generally horizontally positioned fixed canopy pole 512. The movable canopy pole 511 is movable, allowing the user to adjust the degree of shading provided by the canopy device 500 as needed. For example, Figure 4 shows the movable canopy pole 511 in an upright position, where the canopy device 500 provides a greater degree of shading. Figure 5 shows the movable canopy pole 511 in a horizontal position, where the canopy device 500 provides a lesser degree of shading. Of course, the movable canopy pole 511 can be moved to other positions between the upright and horizontal positions.

[0080] To facilitate the detachable fixing of the roof rod 510 to the vehicle frame 1, the roof device 500 according to the present invention further includes a roof mounting base 520 that can be detachably fixed to the vehicle frame 1.

[0081] As shown in Figure 18, a rod slot 523 is provided on one side of the canopy mounting base 520. The end of the fixed canopy rod 512 is fixed in the rod slot 523, and the end of the movable canopy rod 511 is pivotally connected to the other side of the canopy mounting base 520. Thus, the movable canopy rod 511 and the fixed canopy rod 512 are connected to the canopy mounting base 520.

[0082] As shown in Figures 18 and 19, the roof mounting base 520 is provided with a roof joint 521, and the frame 1 is provided with a frame joint 11. The roof joint 521 and the frame joint 11 can be engaged with each other, thereby detachably fixing the roof mounting base 520 to the frame 1.

[0083] Although in the embodiments shown in Figures 17 and 19, the frame joint 11 is formed on the frame base 12, the present invention is not limited thereto, and the frame joint 11 may also be formed on other parts of the frame 1.

[0084] In addition, in the embodiments shown in Figures 17 to 19, the roof joint 521 and the frame joint 11 are mating grooves. In other embodiments, the roof joint 521 and the frame joint 11 may be joined together using other structures with a convex-concave fit.

[0085] To ensure a tighter connection between the roof joint 521 and the frame joint 11, and to prevent the roof assembly 500 from accidentally detaching from the frame 1, as shown in FIG18, the roof joint 521 may be provided with a roof elastic part 522 capable of applying pressure to the frame joint 11. The roof elastic part 522 may be an elastic sheet or other elastic structure.

[0086] In one embodiment, one of the resilient canopy portion 522 and the frame joint portion 11 may be provided with a joint recess 522A (see FIG. 18), and the other may be provided with a joint protrusion 11A capable of engaging with the joint recess 522A (see FIG. 19). The engagement between the joint recess 522A and the joint protrusion 11A further reduces the risk of the canopy device 500 accidentally detaching from the frame 1.

[0087] It should be understood that the present invention is not limited thereto. The canopy mounting bracket 520 can be fixed to the frame 1 by means of threaded connection or pin connection.

[0088] Handlebar mechanism of the frame

[0089] During the use of the vehicle, users frequently need to switch the handlebars 300 between push mode and trailer mode as required. As mentioned earlier, when the frame 1 is in the unfolded state, the user may need the handlebars 300 to be able to unlock relative to the rear foot 100 and pivot, thereby switching the handlebars 300 from push mode to trailer mode. The relevant structures for these switching are described below.

[0090] Figures 20 to 27B illustrate one embodiment of the handlebar mechanism of the frame 1 of the vehicle according to the present invention.

[0091] In the frame 1 including the rear leg 100 and the handlebar 300, the handlebar mechanism according to the invention includes a handlebar fixing rod 400 pivotally connected to the rear leg 100, and the handlebar 300 is connected to the handlebar fixing rod 400 such that the handlebar 300 can pivot synchronously with the handlebar fixing rod 400 (see FIG. 20) or the handlebar 300 can pivot relative to the handlebar fixing rod 400 (see FIG. 21).

[0092] As shown in Figures 22 and 23, a handlebar fixing member 340 may be provided on the handlebar 300, which can move along the handlebar 300 between the engaged position and the unengaged position.

[0093] As shown in Figure 22, when the handlebar fixing member 340 moves to the engaged position, the handlebar locking part 341 of the handlebar fixing member 340 can engage the free end 420 of the handlebar fixing rod 400, so that the handlebar 300 can pivot synchronously with the handlebar fixing rod 400. When the frame 1 is in the unfolded state, if the handlebar fixing rod 400 cannot pivot, the handlebar 300 also cannot pivot, and the user can push the vehicle using the handlebar 300, which is the pushing mode shown in Figure 20. Alternatively, when preparing to fold the frame 1, the handlebar fixing rod 400 can be unlocked relative to the rear foot 100 and pivot, and the handlebar 300 also pivots to the folded state following the unlocking of the handlebar fixing rod 400 relative to the rear foot 100 (as shown in Figures 2 and 3), which is beneficial for the user to fold the vehicle.

[0094] As shown in Figure 23, when the handlebar fixing member 340 moves to the non-engaged position in the direction of the arrow in the figure, the handlebar locking part 341 of the handlebar fixing member 340 disengages from the free end 420 of the handlebar fixing rod 400, allowing the handlebar 300 to pivot relative to the handlebar fixing rod 400. When the frame 1 is in the unfolded state, the handlebar fixing rod 400 remains locked relative to the rear foot 100 and cannot pivot. However, since the handlebar 300 can pivot relative to the handlebar fixing rod 400, the user can pivot the handlebar 300 to a suitable angle position for towing, thereby towing the vehicle by using the handlebar 300. This is the towing mode shown in Figure 21.

[0095] As shown in Figures 25A to 27B, the handlebar fixing member 340 can be a sleeve that is fitted onto the handlebar 300. It can be positioned near the free end 420 of the handlebar fixing rod 400 to facilitate its function.

[0096] Of course, the handlebar fastener 340 can also adopt other structures with grooves that engage with the handlebar 300.

[0097] In the embodiments shown in Figures 7B, 8B, 25B and 27B, the handlebar locking portion 341 on the handlebar fixing member 340 can be formed by a portion extending from the sleeve-shaped body of the handlebar fixing member 340, having a fixing member receiving portion 341A (see Figure 8B). The fixing member receiving portion 341A can be a recess, a sleeve or a collar, and can accommodate the free end 420 of the handlebar fixing rod 400.

[0098] To control the travel distance of the handlebar fixing member 340 along the handlebar 300, as shown in Figures 25B and 26B, the handlebar 300 is provided with a fixing member elongated groove 342 extending along its length. A fixing member connecting pin 343 is configured to pass through the handlebar fixing member 340 and the fixing member elongated groove 342. Therefore, the travel distance of the fixing member connecting pin 343 within the fixing member elongated groove 342 is the travel distance of the handlebar fixing member 340 along the handlebar 300.

[0099] To ensure that the handlebar locking portion 341 of the handlebar fixing member 340 does not accidentally disengage after engaging with the free end 420 of the handlebar fixing rod 400, as shown in Figures 25B and 26B, the handlebar mechanism according to the present invention may further include a fixing member reset device 344, which is configured to tend to move the handlebar fixing member 340 to the engagement position.

[0100] The fixing component reset device 344 can be an elastic component such as a spring, pneumatic rod or hydraulic rod.

[0101] In addition, in order to facilitate the user's operation of the handlebar fixing member 340 and to disengage the handlebar locking part 341 from the free end 420 of the handlebar fixing rod 400, as shown in FIG25B, a fixing member release part 345 may be provided on the handlebar fixing member 340.

[0102] In the embodiment shown in Figure 25B, the locking release part 345 of the fixing member can be a plurality of annular ribs or annular grooves provided around the sleeve-shaped body of the handlebar fixing member 340, which can increase the friction between the user's fingers and the handlebar fixing member 340.

[0103] In other embodiments, the locking release part 345 of the fixing member may also be a pull ring or hook connected to the handlebar fixing member 340, so that the user can drive the handlebar fixing member 340 to a non-engaged position by pulling the pull ring or hook.

[0104] When the handlebar locking part 341 of the handlebar fixing member 340 is engaged with the free end 420 of the handlebar fixing rod 400, in order to prevent the handlebar 300 from pivoting too much (for example, the handlebar 300 pivoting to the ground), as shown in Figures 26B and 27B, the rear foot 100 may be provided with a rear foot connecting seat 120 for the pivot end 301 of the handlebar 300 to be pivotally connected thereto. The handlebar pivot shaft S11 may be provided on the rear foot connecting seat 120, and the rear foot connecting seat 120 may be provided with a handlebar pivot limiting part 121 to limit the pivot angle of the pivot end 301 of the handlebar 300.

[0105] In the embodiments shown in Figures 8B and 27B, the handlebar pivot limiting portion 121 can be a protrusion or blocking rib provided on the rear foot connection seat 120. When the pivot end 301 of the handlebar 300 pivots to a certain angle toward the ground direction (i.e., the pivot direction of the handlebar 300 toward the ground), the protrusion or blocking rib 121 can prevent the pivot end 301 of the handlebar 300 from continuing to pivot toward the ground direction.

[0106] In other embodiments, the rear foot connector 120 may be a housing into which the pivot end 301 of the handlebar 300 is inserted, with a through slot formed on the housing to allow the pivot end 301 of the handlebar 300 to pivot within the range of the through slot. In this case, the two ends of the through slot are the handlebar pivot limiting portions.

[0107] Wheel mechanism of the vehicle frame

[0108] During the folding and unfolding of the transport vehicle, after the user folds and unfolds the frame 1, sometimes the orientation of the wheels 600 will cause the wheels 600 to move away from the body of the frame 1 (as shown in Figure 33), resulting in the frame 1 still having a large volume after being folded. Therefore, the user needs to manually rotate the wheels 600 to bring them closer to the body of the frame 1 (as shown in Figures 34 and 35) in order to reduce the volume of the frame 1 to the minimum. This folding and unfolding operation is very inconvenient.

[0109] Therefore, the present invention provides a wheel mechanism that, while folding the frame 1, can rotate the wheel 600 to a suitable orientation to reduce packaging volume and facilitate user carrying. This not only saves storage space but also reduces packaging costs for manufacturers.

[0110] Figures 28 to 53B illustrate one embodiment of the wheel mechanism of the frame 1 of the vehicle according to the present invention.

[0111] As shown in Figures 28 to 35, in a frame 1 including a front leg 200, a rear leg 100 and a wheel 600, the wheel mechanism according to the present invention includes a wheel seat 610, which is steerably connected to the front leg 200 or the rear leg 100, and the wheel 600 is connected to the wheel seat 610 and can be steered synchronously with the wheel seat 610.

[0112] Figures 36 and 37 illustrate one embodiment of the wheel seat 600 being connected to the front foot 200. The front foot 200 has a wheel seat mounting shaft 640 at its bottom end (see Figure 36), and the wheel seat 610 has a wheel seat mounting hole 614 at its top end (see Figure 37). The wheel seat 610 is connected to the front foot 200 by inserting the wheel seat mounting shaft 640 into the wheel seat mounting hole 614.

[0113] In order to hold the wheel seat mounting shaft 640 in the wheel seat mounting hole 614, as shown in Figures 37, 39, 43 and 44, the wheel mechanism according to the present invention may include a wheel seat locking member 660 disposed on the wheel seat 610, which may be in the form of a sheet structure and have a pressing part exposed in the wheel seat connecting housing 613 of the wheel seat 610 for the user to press. The wheel seat locking member 660 has a sheet-like structure with a large locking member through hole and a small locking member through hole arranged side by side and communicating with each other (see Figure 39). The radial dimension of the large locking member through hole is larger than the radial dimension of the main body of the wheel seat mounting shaft 640, and the radial dimension of the small locking member through hole is smaller than the radial dimension of the main body of the wheel seat mounting shaft 640 but larger than the radial dimension of the recess on the wheel seat mounting shaft 640. This allows the wheel seat mounting shaft 640 to remain in the wheel seat mounting hole 614 when the recess on the wheel seat mounting shaft 640 and the small locking member through hole are radially aligned. When the pressing part of the wheel seat locking member 660 is pressed, causing the wheel seat locking member 660 to move radially until the recess on the wheel seat mounting shaft 640 and the small locking member through hole are no longer radially aligned and the wheel seat mounting shaft 640 and the large locking member through hole are completely radially aligned, the wheel seat mounting shaft 640 can be removed from the wheel seat mounting hole 614.

[0114] In addition, as shown in Figures 39, 43 and 44, the wheel seat 610 may also be provided with a wheel seat reset device 661, which is configured to move the wheel seat locking member 660 such that the small through hole of the locking member coincides radially with the recess on the wheel seat mounting shaft 640, so as to ensure that the wheel seat mounting shaft 640 is held in the wheel seat mounting hole 614.

[0115] In another embodiment, the wheel seat mounting shaft 640 may also be provided on the wheel seat 610, and the wheel seat mounting hole 614 is correspondingly provided in the front foot 200.

[0116] Of course, the wheel seat 600 can also be connected to the rear foot 100 in the same way.

[0117] In other embodiments, the wheel seat 600 may also be connected to the front foot 200 or the rear foot 100 by other means such as threaded connection.

[0118] It should be noted that the wheel mechanism according to the present invention is applicable to each wheel 600 and the front leg 200 or rear leg 100 connected to the wheel seat 610. Therefore, the following description will be based on the situation shown in the accompanying drawings.

[0119] When the frame 1 is in the extended and retracted states, the wheel 600 must be maintained at least in the extended orientation (i.e., the orientation of the wheel 600 when the frame 1 is extended, in which case the wheel 600 is away from the body of the frame 1, see Figure 32) and the retracted orientation (i.e., the orientation of the wheel 600 when the frame 1 is retracted, in which case the wheel 600 is close to the body of the frame 1, see Figure 35). To this end, as shown in Figures 36 and 37, the wheel seat 610 is provided with a wheel steering positioning member 611, and at least two wheel steering positioning holes 620 are provided on the front leg 200 or rear leg 100 corresponding to the wheel seat 610. When the wheel steering positioning member 611 is inserted into one of the wheel steering positioning holes 620, the wheel seat 610 and the connected wheel 600 can be oriented, thereby maintaining the wheel seat 610 and the connected wheel 600 in the extended orientation, retracted orientation, or other orientations.

[0120] More specifically, the wheel steering locator 611 can be operated to move between an oriented position and a non-oriented position. As shown in Figures 42 and 44, when the wheel steering locator 611 moves to the oriented position, it can be inserted into one of the wheel steering locating holes 620 to orient the wheel seat 610 and its connected wheel 600. As shown in Figures 41 and 43, when the wheel steering locator 611 moves to the non-oriented position, it disengages from the wheel steering locating hole 620 to allow the wheel seat 610 and its connected wheel 600 to steer.

[0121] In order to enable the wheel steering positioning member 611 to move between a directional position and a non-directional position, in the embodiments shown in Figures 37 and 39, the wheel mechanism according to the present invention may include a directional member receiving seat 612, which is movably disposed on the wheel seat 610, and the wheel steering positioning member 611 is disposed on the directional member receiving seat 612 and moves with the directional member receiving seat 612.

[0122] In another embodiment, a receiving channel may be provided in the wheel seat 610, in which the wheel steering positioning member 611 can move up and down.

[0123] To facilitate user operation of the wheel steering positioning member 611 to move it between a directional position and a non-directional position, the wheel mechanism according to the invention may further include a wheel orientation operation member 630, which is configured to be operable to drive the orientation member receiving seat 612 to move.

[0124] In the embodiments shown in Figures 38 and 39, the wheel orientation operating member 630 is a ring-shaped wheel operating knob 630, which can be sleeved on the wheel seat connecting housing 613 of the wheel seat 610. Furthermore, as shown in Figure 38, the inner wall of the wheel operating knob 630 is provided with a knob driving rib 631. Correspondingly, as shown in Figure 39, the outer wall of the orientation member receiving seat 612 is provided with a receiving seat driving groove 612A. The knob driving rib 631 is disposed within the receiving seat driving groove 631 and can apply force to the receiving seat driving groove 631. Therefore, when the wheel operating knob 630 rotates, by means of the force exerted by the knob driving rib 631 on the receiving seat driving groove 631, the wheel operating knob 630 can drive the orientation member receiving seat 612 to move, causing the wheel steering positioning member 611 to move between an orientation position and a non-orientation position.

[0125] In the embodiment shown in Figure 38, the end of the knob drive rib 631 may be provided with a rib limiting part 632, which can control the rotation stroke of the wheel operation knob 630 to prevent the wheel operation knob 630 from rotating too much and causing the knob drive rib 631 to disengage from the receiving seat drive groove 631.

[0126] In the embodiment shown in FIG38, the wheel operation knob 630 may further include a knob operation protrusion 633, which protrudes outward from the outer wall surface of the wheel operation knob 630 so that the user can operate the wheel operation knob 630.

[0127] Of course, the wheel orientation operating member 630 can also adopt other structures, such as a lever, one end of which is connected to the orientation member receiving seat 612 or the wheel steering positioning member 611, and the other end is exposed in the wheel seat 610. By moving the lever, the wheel steering positioning member 611 can be moved between the orientation position and the non-orientation position.

[0128] As shown in Figures 37 and 41, a wheel cover 650 can be provided above the wheel operation knob 630. This cover seals the internal structure of the wheel seat 610 from above, preventing foreign objects from entering the interior of the wheel seat 610. The wheel cover 650 can be provided with a first cover hole 651 through which the wheel seat mounting shaft passes and a second cover hole 652 through which the wheel steering positioning member 611 passes.

[0129] To make it more convenient for users, the wheel mechanism according to the present invention also enables the wheel seat 610 and its connected wheel 600 to change from orientation to allow steering during the folding process of the frame 1, and the wheel seat 610 and its connected wheel 600 to turn to the folding orientation (see FIG35), without the need for direct operation by the user.

[0130] First, the structure of the wheel seat 610 and the connected wheel 600, which are linked together, change from orientation to allow steering during the retraction of the frame 1.

[0131] The frame 1 may include at least one of a front undertube 710 and a rear undertube 720, wherein the front undertube 710 and / or the rear undertube 720 are configured to pivot during the retraction of the frame 1 and to drive the wheel steering locator 611 to a non-directional position.

[0132] In the embodiments shown in Figures 45A to 49B, the first end 711 of the front bottom tube 710 is pivotally connected to the front foot 200, and the first end 721 of the rear bottom tube 720 is pivotally connected to the rear foot 100.

[0133] As shown in Figures 46B and 48B, at least one of the first end 711 of the front undertube 710 and the first end 721 of the rear undertube 720 may be provided with an undertube drive unit 701, and the corresponding front foot 200 and / or rear foot 100 may be provided with an undertube transmission element. By pivoting the front undertube 710 and / or the rear undertube 720, the undertube drive unit 701 on it can drive the wheel steering positioning member 611 to move to a non-directional position via the undertube transmission assembly.

[0134] Figures 46B, 48B, and 49B to 51 illustrate an embodiment of the undertube drive element according to the present invention. The undertube drive assembly is disposed within a wheel seat 610 and includes a first drive member 702 abutting against the undertube drive portion 701 and a second drive member 703 abutting against the wheel steering alignment member 611. The first drive member 702 and the second drive member 703 abut against each other, such that the force exerted by the undertube drive portion 701 is transmitted to the wheel steering alignment member 611 via the first drive member 702 and the second drive member 703.

[0135] To change the direction of force transmission, as shown in Figures 49B to 51, the contact surfaces of the first transmission member 702 and the bottom tube drive part 701, as well as the contact surfaces of the first transmission member 702 and the second transmission member 703, can both be configured as transmission ramps. For example, the first transmission member 702 can be provided with a first driving ramp 702A and a first driven ramp 702B (see Figure 50), and the second transmission member 703 can be provided with a second driven ramp 703A (see Figure 51).

[0136] As shown in Figures 46B and 48B, the bottom tube transmission element according to the present invention may further include a second transmission member reset device 703B, which is configured to press the second transmission member 703 against the first transmission member 702 to prevent the two from disengaging.

[0137] Next, the structure in which the wheel seat 610 and the connected wheel 600 are driven to turn toward the retraction orientation during the retraction process of the frame 1 will be described.

[0138] In the embodiments shown in Figures 52A to 53B, at least one of the first end 711 of the front bottom tube 710 and the first end 721 of the rear bottom tube 720 may be provided with a bottom tube pusher 704, and the wheel seat 610 is provided with a wheel seat driven part 653. By pivoting the corresponding front bottom tube 710 and / or rear bottom tube 720 during the retraction of the frame 1, the bottom tube pusher 704 can push the wheel seat driven part 653, thereby driving the wheel seat 610 to turn to the retraction orientation.

[0139] The bottom tube pushing part 704 may be a radial extension provided on the first end 711 of the front bottom tube 710 and / or the first end 721 of the rear bottom tube 720.

[0140] The wheel seat driven part 653 can be a radial protrusion provided on the outer periphery of the wheel seat cover 650 (see Figure 37), or it can be a radial protrusion provided on other parts of the wheel seat 610.

[0141] It should be understood that regarding the structure of the wheel seat 610 and its connected wheel 600, which moves from orientation to permissible steering during the retraction of the frame 1, and the structure driven to turn back to the retraction orientation, either one of these structures can be installed separately on the frame 1, or both structures can be installed on the frame 1. If both structures are installed on the frame 1, then these two structures should be configured such that the wheel seat 610 and its connected wheel 600 first move from orientation to permissible steering during the retraction of the frame 1, and then are driven to turn back to the retraction orientation.

[0142] The chassis of the transport vehicle

[0143] The following will describe the connecting components of the vehicle frame of the vehicle according to the present invention, as well as their connection and linkage relationships.

[0144] Figures 14 to 17 illustrate one embodiment of the vehicle frame of the vehicle according to the present invention. The lines connecting the pivot axes between the various connecting members of the frame 1 form multiple linkage quadrilaterals. Each pair of pivot axes corresponds substantially to one connecting member. Through these linkage quadrilaterals, the movement of any connecting member of the frame 1 will cause the other multiple connecting members to move together. This allows the user to operate only one or two connecting members of the frame 1 during the unfolding and folding process, enabling the other connecting members to unfold and fold together simultaneously. This greatly increases the convenience for the user when unfolding and folding the frame 1.

[0145] As shown in Figures 14 to 16, the frame 1 may include a frame base 12, a front leg 200, a rear leg 100, a front undertube 710, and a rear undertube 720.

[0146] The front foot 200 includes an upper front foot 201 and a lower front foot 202 pivotally connected to each other via a front foot pivot S1, and the rear foot 100 includes an upper rear foot 101 and a lower rear foot 102 pivotally connected to each other via a rear foot pivot S2. The upper rear foot and the upper front foot are pivotally connected to the frame base 12 of the frame 1 via a first frame pivot S3.

[0147] In addition, the front undertube 710 is pivotally connected to the lower front foot 202 via the front undertube pivot S4, and is pivotally connected to the frame base 12 via the second frame pivot S5.

[0148] The rear undertube 720 is pivotally connected to the lower rear foot 102 via the rear undertube pivot S6, and to the frame base 12 via the third frame pivot S7.

[0149] Therefore, the sequential connection of the first frame pivot S3, the rear foot pivot S2, the rear undertube pivot S6 and the third frame pivot S7 can form a first polygon, and the sequential connection of the first frame pivot S3, the front foot pivot S1, the front undertube pivot S4 and the second frame pivot S5 can form a second polygon.

[0150] As shown in Figures 14 to 17, the frame 1 may also include a frame slider 13, a first connector 730, and a second connector 740.

[0151] As shown in Figure 17, the frame slider 13 is movably mounted on the frame base 12 in the vertical direction. For example, the frame slider 13 can move within the base groove 12A extending vertically in the frame base 12.

[0152] The first connector 730 is pivotally connected to the upper part of the rear foot 101 via the first connector pivot S8, and the second connector 740 is pivotally connected to the upper part of the front foot 201 via the second connector pivot S9. The second connector 740 and the first connector 730 are pivotally connected to the frame slider 13 via the slider pivot S10.

[0153] Therefore, the sequential connection of the first frame pivot S3, the first connecting member pivot S8, the slider pivot S10, and the second connecting member pivot S9 can form a third polygon.

[0154] As shown in Figures 14 to 16, the frame 1 may also include a support member 750.

[0155] The handlebar 300 is pivotally connected to the upper rear foot 101 via the handlebar pivot S11, and the support 750 is pivotally connected to the handlebar 300 via the support pivot S12 and to the frame base 12 via the second frame pivot S5.

[0156] Therefore, the sequential connection of the first frame pivot S3, the second frame pivot S5, the support pivot S12, and the handlebar pivot S11 can form a fourth polygon.

[0157] The edges of the first, second, third, and fourth polygons comprise most of the connecting components of the frame 1. Moreover, these four polygons are interconnected; when one polygon deforms, the others will also deform, thus enabling the connecting components of the frame 1 to move in unison, ultimately allowing the frame 1 to unfold and fold.

[0158] The following is a detailed description of how the retraction mechanism, canopy device, handlebar mechanism and wheel structure of frame 1 cooperate and operate with each other during the retraction process of frame 1, and how the four polygons move and deform in conjunction.

[0159] When the user is ready to fold or fold the frame 1, for a frame 1 with a canopy device 500, the user can choose to fold or fold the canopy device 500 of the frame 1 first. That is, the movable canopy rod 511 is moved to a horizontal position and stacked on top of the fixed canopy rod 512, as shown in Figure 5.

[0160] Of course, users can also choose not to fold down the roof device 500 of the frame 1, as shown in Figures 15 and 16.

[0161] Alternatively, if the roof device 500 is not installed on the frame 1, as shown in Figures 20 to 24, then there is no need to operate the roof device 500.

[0162] Next, if the handlebar 300 is in the trailer mode shown in Figure 21, in order to fold the frame 1, the user needs to operate the handlebar mechanism of the frame 1 to switch the handlebar 300 to the push mode, so that the handlebar 300 can pivot synchronously with the handlebar fixing rod 400.

[0163] For example, the user can pivot the handlebar 300 relative to the rear foot 100 in a direction away from the ground (i.e., counterclockwise in Figure 21) until the handlebar 300 and the handlebar fixing rod 400 are approximately aligned laterally, so that the handlebar locking part 341 of the handlebar fixing member 340 provided on the handlebar 300 engages with the free end 420 of the handlebar fixing rod 400, thereby enabling the handlebar 300 to pivot synchronously with the handlebar fixing rod 400, preparing for the folding of the frame 1.

[0164] Then, the user will release the lock on frame 1.

[0165] Specifically, the user can operate the release mechanism of the retraction mechanism of the frame 1, that is, operate the handlebar slide 310 on the handlebar 300, so that the handlebar fixing rod 400 can be released relative to the rear foot 100 and pivot. As a result, the handlebar 300, which pivots synchronously with the handlebar fixing rod 400 relative to the rear foot 100, can also pivot towards the retracted position. Thus, the frame 1 is released.

[0166] After that, the user will fold up the frame 1.

[0167] As shown in Figure 15, after the frame 1 is unlocked, the user can push the handlebar 300 forward, which lifts the support 750 upward and pulls the upper rear leg 101 upward. As a result, the fourth polygon involving the handlebar 300, support 750, upper rear leg 101, and frame base 12 deforms.

[0168] As the fourth polygon deforms, the upper part 101 of the rear foot causes the lower part 102 of the rear foot to move upward, and the lower part 102 of the rear foot in turn causes the rear undertube 720 to move upward. As a result, the first polygon involving the upper part 101 of the rear foot, the lower part 102 of the rear foot, the rear undertube 720 and the frame base 12 also deforms.

[0169] At the same time, the upper part 101 of the rear foot also drives the first connecting member 730 upward, the first connecting member 730 drives the second connecting member 740 upward, and the second connecting member 740 pushes the upper part 201 of the front foot upward. As a result, the third polygon involving the upper part 101 of the rear foot, the first connecting member 730, the second connecting member 740, and the upper part 201 of the front foot also deforms.

[0170] At the same time, the upper part 201 of the front foot drives the lower part 202 of the front foot upward, and the lower part 202 of the front foot drives the front bottom tube 710 upward. As a result, the second polygon involving the upper part 201 of the front foot, the lower part 202 of the front foot, the front bottom tube 710 and the frame base 12 also deforms.

[0171] Ultimately, the four polygons deform simultaneously, causing the associated connecting components to move and come together, thus allowing the frame 1 to be retracted.

[0172] During the retraction of the frame 1, the wheel mechanism of the frame 1 is also driven, causing the wheel seat 610 and its connected wheel 600 to turn to the retraction orientation.

[0173] Specifically, during the deformation of the first polygon involving the rear foot 102 and the rear bottom tube 720 and the second polygon involving the front foot 202 and the front bottom tube 710, the rear bottom tube 720 pivots relative to the rear foot 102 and the front bottom tube 710 pivots relative to the front foot 202, causing the bottom tube drive 701 provided on at least one of the rear bottom tube 720 and the front bottom tube 710 to drive the wheel steering positioning member 611 in the wheel seat 610 to move to a non-directional position via the bottom tube transmission assembly, thereby causing the wheel seat 610 and the wheel 600 connected thereto to change from directional to allow steering.

[0174] Subsequently, the rear bottom tube 720 continues to pivot relative to the lower part of the rear foot 102, and the front bottom tube 710 continues to pivot relative to the lower part of the front foot 202, so that the bottom tube pusher 704 provided on at least one of the rear bottom tube 720 and the front bottom tube 710 pushes the wheel seat driven part 653 on the wheel seat 610, thereby causing the wheel seat 610 and the connected wheel 600 to turn to the retraction orientation.

[0175] Finally, all the components of the frame 1 were tightly packed together.

[0176] The foregoing embodiments and advantages are merely exemplary and should not be considered as limiting the invention. The description herein is intended to be illustrative and not to limit the scope of the claims. Various alternatives, variations, and modifications will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein can be combined in various ways to obtain other and / or alternative exemplary embodiments.

[0177] 1: Frame 11: Frame joint 11A:Joining convex part 12: Chassis base 12A: Base groove 13: Frame slider 100: Back foot 101: Upper part of the hind foot 102: Lower part of the heel 110: Rear foot locking hole 120: Rear foot connecting seat 121: Handlebar pivot limiter 200: Front foot 201: Upper part of the forefoot 202: Lower part of the forefoot 300: Handlebars 301: Pivot End 301A: Pivot Limiting Part 310: Handlebar Slipper 311: Long groove of the sliding sleeve 312: Slip sleeve fixing pin 320: Handlebar drive unit 321: Pushing part of the driving component 322: Long slot for drive component 323: Drive component fixing pin 324: Drive component reset device 330: Handlebar towing component 331: First end 332: Second end 340: Handlebar fixing parts 341: Handlebar locking unit 341A: Fixture Receiving Section 342: Long slot for fastener 343: Fastener connecting pin 344: Fixture Reset Device 345: Unlocking part of the fastener 350: Handlebar pivot 400: Handlebar fixing rod 410: Fixing rod locking component 411: Locking component top promotion 412: Locking component reset device 420: Free End 500: Roofing device 510: Roof pole 511: Movable canopy pole 512: Fixed canopy rod 520: Canopy Mounting Mount 521: Roof joint 522: Roof Elastic Section 522A: Engagement recess 523: Rod slot 530: Canopy 600: Wheels 610: Wheel base 611: Wheel Steering Alignment Component 612: Orientation component housing 612A: Receiving seat drive slant 612B: Resettlement device for the receiving seat 613: Wheel seat connecting shell 614: Wheel mount holes 620: Wheel steering alignment hole 630: Wheel operation knob, wheel orientation control component 631: Knob-driven slanted rib 632: Inclined Rib Limiting Part 633: Knob operation protrusion 640: Wheel mount shaft 650: Wheel seat cover 651: First cover hole 652: Second cover hole 653: Wheel seat driven part 660: Wheel seat locking component 661: Wheel seat reset device 701: Bottom tube drive unit 702: First transmission component 703: Second transmission component 703B: Second transmission component reset device 704: Bottom tube push section 710: Front bottom tube 711: First End 720: Rear bottom tube 721: First End 730: First connector 740: Second connector 750: Support component S1: Front foot pivot axis S2: Rear foot pivot axis S3: First frame pivot axis S4: Front undertube pivot S5: Second frame pivot S6: Rear bottom tube pivot S7: Third frame pivot S8: First connecting member pivot axis S9: Second connecting member pivot axis S10: Slider pivot axis S11: Handlebar pivot S12: Support pivot axis

Claims

1. A folding mechanism for the frame of a transport vehicle, wherein, The frame includes a rear leg and a handlebar. The retraction mechanism includes a handlebar retaining rod, which is pivotally connected to the rear leg. The handlebar is connected to the handlebar retaining rod so that the handlebar can pivot synchronously with the handlebar retaining rod. The handlebar retaining rod is provided with a retaining rod locking member, which is movable between a locked position and an unlocked position. When the retaining rod locking member moves to the locked position, it locks onto the rear leg to prevent the handlebar retaining rod from pivoting relative to the rear leg. When the retaining rod locking member moves to the unlocked position, it unlocks relative to the rear leg to allow the handlebar retaining rod to pivot relative to the rear leg.

2. The closing mechanism as described in claim 1, wherein, The fixing rod locking member is located in the handlebar fixing rod and can move along the handlebar fixing rod between the locked position and the unlocked position. The rear foot has a part where the handlebar fixing rod is pivotally connected. The part is provided with a rear foot locking hole. When the fixing rod locking member moves to the locked position, the fixing rod locking member is inserted into the rear foot locking hole. When the fixing rod locking member moves to the unlocking position, the fixing rod locking member disengages from the rear foot locking hole.

3. The closing mechanism as described in claim 1, wherein, The retraction mechanism also includes a handlebar slide that can move along the handlebar, and the handlebar slide can drive the fixed rod locking member to the unlock position via the slide transmission assembly.

4. The closing mechanism as described in claim 3, wherein, The sliding sleeve transmission assembly includes: a handlebar drive member configured to move along the handlebar; a handlebar traction member, a first end of which is connected to the handlebar sliding sleeve, and a second end of which is connected to the handlebar drive member, such that movement of the handlebar sliding sleeve can drive the handlebar drive member from an initial position to a driving position; wherein the handlebar drive member has a drive member pushing portion, the drive member pushing portion interacting with a locking member pushing portion disposed on the fixed rod locking member, such that the handlebar drive member can drive the fixed rod locking member to move to the unlocking position.

5. The retraction mechanism as claimed in claim 1, further comprising a locking member reset device configured to tend to move the fixing rod locking member to the locked position.

6. The closing mechanism as described in claim 4, wherein, The handlebar has a drive component slot extending along its length. A drive component fixing pin is configured to pass through the handlebar drive component and the drive component slot. The second end of the handlebar traction component is connected to the drive component fixing pin.

7. The closing mechanism as described in claim 6, wherein, The travel of the sliding sleeve retaining pin within the long groove of the sliding sleeve is greater than or equal to the travel of the driving component retaining pin within the long groove of the driving component, so that the movement of the handlebar sliding sleeve is sufficient to drive the handlebar driving component to the driving position, thereby driving the retaining rod locking component to the unlocking position.

8. The closing mechanism as described in claim 1, wherein, The handlebar is provided with a handlebar fixing member, which can move between an engaged position and a non-engaged position. When the handlebar fixing member moves to the engaged position, the handlebar locking part of the handlebar fixing member can engage the free end of the handlebar fixing rod, so that the handlebar can pivot synchronously with the handlebar fixing rod. When the handlebar fixing member moves to the non-engaged position, the handlebar locking part of the handlebar fixing member disengages from the free end of the handlebar fixing rod, so that the handlebar can pivot relative to the handlebar fixing rod.

9. The closing mechanism as described in claim 8, wherein, The handlebar has a long groove for fixing that extends along the length of the handlebar. A fixing pin is configured to pass through the handlebar fixing member and the long groove. The handlebar mechanism includes a fixing member reset device, which is configured to move the handlebar fixing member to the engagement position.

10. The closing mechanism as described in claim 1, wherein, The rear foot is provided with a rear foot connecting seat for the pivot end of the handlebar to be pivotally connected thereto, and the rear foot connecting seat is provided with a handlebar pivot limiting part for limiting the pivot angle of the pivot end of the handlebar.

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