Vehicle and cart

Abstract

The application relates to a carrier, comprising: a first pivot joint having a first pivot part and a second pivot part pivoted about a first pivot axis; a second pivot joint having a fourth pivot part and a second rotating part pivoted to each other about a second pivot axis, the first pivot axis and the second pivot axis being non-collinear; a first linkage release mechanism, when the first pivot part and the second pivot part are relatively fixed, the first linkage release mechanism locking the fourth pivot part and the second rotating part to limit the rotation of the fourth pivot part relative to the second rotating part; when the second pivot part rotates relative to the first pivot part, the first linkage release mechanism releases the locking of the fourth pivot part and the second rotating part to allow the rotation of the fourth pivot part relative to the second rotating part, the rotation of the second pivot part driving the rotation of the fourth pivot part; and a second linkage release mechanism, the rotation of the fourth pivot part driving the movement of the second linkage release mechanism.

Description

Technical Field

[0001] This application relates to the field of mobile vehicle technology, and in particular to a vehicle and a trolley on which the vehicle is mounted. Background Technology

[0002] To facilitate the use and storage of strollers, both the frame and the mounting hardware (such as a child seat) have folding functions. However, the frame and mounting hardware can generally only be folded separately. Therefore, when folding, the mounting hardware must be removed from the frame for separate folding, and when using it again, both must be unfolded before the mounting hardware is reinstalled onto the frame. This makes the folding and unfolding process cumbersome and inconvenient to use. Summary of the Invention

[0003] Therefore, it is necessary to provide a convenient folding vehicle to address the above-mentioned technical problems. This vehicle can fold in conjunction with the frame when folded, so that the vehicle does not need to be removed from the frame.

[0004] According to one aspect of this application, a carrier is provided, comprising: a first pivot joint having a first pivot portion and a second pivot portion pivoting about a first pivot axis; a second pivot joint having a fourth pivot portion and a second rotating portion pivotally connected to each other about a second pivot axis, wherein the first pivot axis and the second pivot axis are not collinear; a first linkage release mechanism, wherein when the first pivot portion and the second pivot portion are relatively fixed, the first linkage release mechanism locks the fourth pivot portion and the second rotating portion to restrict rotation of the fourth pivot portion relative to the second rotating portion; when the second pivot portion rotates relative to the first pivot portion, the first linkage release mechanism releases the lock on the fourth pivot portion and the second rotating portion to allow rotation of the fourth pivot portion relative to the second rotating portion, and the rotation of the second pivot portion drives the rotation of the fourth pivot portion; and a second linkage release mechanism, wherein the rotation of the fourth pivot portion drives the second linkage release mechanism to move.

[0005] In one embodiment, the first linkage release mechanism includes a second driving member and a locking member. The second driving member is movably disposed between the first pivot joint and the second pivot joint, and the locking member is movably disposed in the second pivot joint. The moving direction of the second driving member intersects with the rotation direction of the second pivot part and the moving direction of the locking member. When the first pivot part and the second pivot part are relatively fixed, the second pivot part abuts against the second driving member, and the second driving member abuts against the locking member. The locking member engages the fourth pivot part and the second pivot part to restrict the rotation of the fourth pivot part relative to the second pivot part. When the second pivot part rotates relative to the first pivot part, the second pivot part and the second driving member are spaced apart, and the locking member disengages from the fourth pivot part to allow the fourth pivot part to rotate relative to the second pivot part.

[0006] In one embodiment, the first pivot axis and the second pivot axis are parallel to each other; the second pivot part is provided with a first pushing part, which extends around the first pivot axis along with the second pivot part; the second driving member moves in a direction perpendicular to the first pivot axis and the second pivot axis, and the locking member moves in a direction parallel to the second pivot axis.

[0007] In one embodiment, the first linkage release mechanism further includes a sixth elastic element, which drives the locking element to disengage from the fourth pivot when the second pivot and the second driving element are spaced apart.

[0008] In one embodiment, the first pivot joint further includes: a first rotating portion pivotally connected to the second pivot portion about a first pivot axis; a first locking member having a locked position and an unlocked position, wherein when the first locking member is in the locked position, the first locking member restricts relative rotation between the first pivot portion and the second pivot portion, and when the first locking member is in the unlocked position, the first locking member allows relative rotation between the first pivot portion and the second pivot portion; and a second locking member having a locked position and an unlocked position, wherein when the second locking member is in the locked position, the second locking member restricts relative rotation between the second pivot portion and the first rotating portion, and when the second locking member is in the unlocked position, the first locking member allows relative rotation between the first pivot portion and the second pivot portion. In the unlocked position, the second locking member allows the second pivot and the first rotating part to rotate relative to each other; the first driving member has a first position, a second position, and a third position; when the first driving member is in the first position, the first locking member is in the locked position, and the second locking member is in the locked position; when the first driving member is in the second position, the first locking member is in the locked position, the second locking member is in the unlocked position, and the first pivot and the second pivot are relatively fixed to rotate together relative to the first rotating part; when the first driving member is in the third position, the first locking member is in the unlocked position, and the second locking member is in the unlocked position.

[0009] In one embodiment, the first drive member rotates about a first pivot axis, and both the first locking member and the second locking member move in a direction parallel to the first pivot axis. The first locking member and the second locking member are located on opposite sides of the first drive member in a direction parallel to the first pivot axis. The first locking member moves from the locked position away from the first drive member to the unlocked position, and the second locking member moves from the locked position towards the first drive member to the unlocked position.

[0010] In one embodiment, the first driving member rotates from the first position to the third position, driving the first locking member to move from the locked position to the unlocked position; the first driving member rotates from the third position to the first position, driving the second locking member to move from the unlocked position to the locked position.

[0011] In one embodiment, the first pivot joint further includes a first elastic member and a second elastic member. The first driving member rotates from a first position to a third position, the second elastic member drives the second locking member to move from a locked position to an unlocked position, the first driving member rotates from the third position to the first position, and the first elastic member drives the first locking member to move from an unlocked position to a locked position.

[0012] In one embodiment, the first drive member or the first locking member is provided with an inclined surface that extends in a direction about a first pivot axis and is inclined relative to a direction parallel to the first pivot axis. The first drive member rotates from a first position to a third position, driving the inclined surface to abut against one of the first drive member and the first locking member and to rotate relative to one of the first drive member and the first locking member, thereby driving the first locking member to move from a locked position to an unlocked position.

[0013] In one embodiment, the first drive member is provided with an inclined surface that extends in a direction about a first pivot axis and is inclined relative to a direction parallel to the first pivot axis. The first drive member rotates from a third position toward a first position, driving the inclined surface to abut against the second locking member and rotate relative to the second locking member, thereby driving the second locking member to move from an unlocked position to a locked position.

[0014] In one embodiment, the first rotating part has a first locking hole and a second locking hole on the side facing the second locking member. The first locking hole and the second locking hole are spaced apart along the direction around the first pivot axis. The second locking member is movably connected to the second pivot part and is fixed relative to the second pivot part in the direction around the first pivot axis. When the driving member is in the first position, the second locking member enters the first locking hole or the second locking hole to restrict the relative rotation of the second pivot part and the first rotating part. When the driving member is in the second position or the third position, the second locking member disengages from the first locking hole or the second locking hole to allow the second pivot part and the first rotating part to rotate relative to each other.

[0015] In one embodiment, a limiting portion is provided on the side of the first rotating part facing the second locking member. The second locking member is movably connected to the second pivoting part and is fixed relative to the second pivoting part in the direction around the first pivoting axis. When the first driving member is in the second position, the second locking member rotates relative to the first rotating part with the second pivoting part. The limiting portion is located in the direction of rotation of the second locking member around the first pivoting axis, blocking the second locking member from rotating relative to the first rotating part, thereby blocking the relatively fixed second pivoting part and the first pivoting part from rotating relative to the first rotating part.

[0016] In one embodiment, the unlocking position includes a first unlocking position and a second unlocking position; when the drive member is in the second position, the second locking member is in the first unlocking position, and the limiting part is located in the direction in which the second locking member rotates about the first pivot axis; when the drive member is in the third position, the second locking member is in the second unlocking position, and the limiting part is not located on the stroke of the second locking member rotating about the first pivot axis.

[0017] In one embodiment, the first pivot joint further includes a fourth locking member, which is movably connected to the second pivot portion and is fixed relative to the second pivot portion in the direction surrounding the first pivot axis. The first rotating portion includes a limiting post protruding into the second pivot portion, and the circumferential surface of the limiting post is provided with a stop surface. When the first driving member is in the second position and the limiting portion and the second locking member abut against each other in the direction surrounding the first pivot axis, the fourth locking member abuts against the stop surface in the direction surrounding the first pivot axis. When the first driving member is in the third position and the second pivot portion rotates relative to the first rotating portion, the fourth locking member moves to the outside of the stop surface along the extension direction of the stop surface.

[0018] In one embodiment, the first pivot portion rotates relative to the first rotating portion between a first limit position and a second limit position; the first pivot portion is provided with a first stop portion, and the first rotating portion is provided with a second stop portion. When the first side of the first stop portion abuts against the first side of the second stop portion, the first pivot portion is located at the first limit position, and when the second side of the first stop portion abuts against the second side of the second stop portion, the first pivot portion is located at the second limit position.

[0019] In one embodiment, the vehicle further includes: a release mechanism, which includes: a traction member, one end of which is connected to a first drive member; and a handle, having: a first pivot stroke, wherein when the handle pivots by the first pivot stroke, the handle drives the first drive member to move from a first position to a second position via the traction member; and a second pivot stroke, wherein when the handle pivots by the second pivot stroke, the handle drives the first drive member to move from the first position to a third position via the traction member, the second pivot stroke being greater than the first pivot stroke.

[0020] In one embodiment, the vehicle further includes a stop, and the release mechanism further includes a safety push button that moves relative to the handle between a first movable position and a second movable position. When the safety push button is in the first movable position, the safety push button abuts against the stop when the handle pivots for a first pivot stroke to prevent the handle from continuing to pivot. When the safety push button is in the second movable position, the safety push button does not abut against the stop when the handle pivots for a first pivot stroke to allow the handle to continue pivoting until the second pivot stroke is completed.

[0021] In one embodiment, the first pivot joint further includes: a third pivot portion, which is pivotally connected to a first connecting seat and a second connecting seat around a first pivot axis. The third pivot portion is provided with a movable groove. The first connecting seat is provided with a first positioning portion extending into the movable groove. The second connecting seat is provided with a second positioning portion extending into the movable groove. The first positioning portion and the second positioning portion are movable within the movable groove around the first pivot axis. When the first pivot portion and the second pivot portion are relatively fixed, the two ends of the extending direction of the movable groove abut against the first positioning portion and the second positioning portion, respectively. The third pivot portion, the first pivot portion, and the second pivot portion are relatively fixed. When the first pivot portion and the second pivot portion rotate relative to each other, at least one end of the extending direction of the movable groove separates from at least one of the first positioning portion and the second positioning portion, so that the third pivot portion can rotate relative to both the first pivot portion and the second pivot portion.

[0022] In one embodiment, the second pivot joint further includes a mounting base pivotally connected to the second rotating part, and the second linkage release mechanism includes a third locking member having a pivot position and a stop position. When the third locking member is in the pivot position, the third locking member allows the second rotating part and the mounting base to pivot relative to each other. When the third locking member is in the stop position, the third locking member prevents the pivot base and the mounting base from pivoting relative to each other. Rotation of the fourth pivot part drives the third locking member to move from the stop position to the pivot position.

[0023] In one embodiment, the fourth pivot or the third locking member is provided with a pushing ramp that extends along the direction surrounding the second pivot axis and is inclined relative to the direction parallel to the second pivot axis. The rotation of the fourth pivot drives the pushing ramp to abut against one of the first driving member and the first locking member and rotates relative to one of the first driving member and the first locking member, thereby driving the third locking member to move from the stop position to the pivot position.

[0024] In one embodiment, the fourth pivot portion is provided with a second push portion extending along the second pivot axis, the third locking member is provided with a mounting through hole for the second push portion to pass through, the circumferential surface of the second push portion is provided with a push slope, and the rotation drive push slope of the fourth pivot portion abuts against the wall of the mounting through hole.

[0025] In one embodiment, the first pivot joint further includes: a first rotating part pivotally connected to the second pivot part around a first pivot axis, the first rotating part and the second rotating part being interconnected; when the third locking member is in the pivot position, the first pivot joint and the second rotating part can pivot together relative to the mounting seat.

[0026] In one embodiment, the third locking member switches between a stopped position and a pivot position in a direction parallel to the second pivot axis, and the third locking member is fixed relative to the mounting base in a direction around the second pivot axis; the second linkage release mechanism further includes: a release part, which is disposed on the side of the third locking member facing the mounting base, and a release hole is provided on the mounting base at a position aligned with the release part, wherein when the third locking member moves to the pivot position, the release part protrudes from the mounting base through the release hole.

[0027] In one embodiment, the vehicle further includes: a second frame connected to a second pivot; a seat plate connected to a fourth pivot; and a connector connecting the second frame and the seat plate; when the second pivot rotates relative to the first pivot, the second frame drives the seat plate to rotate via the connector.

[0028] In one embodiment, the fourth pivot part is provided with a limiting groove that extends around the second pivot axis; the second pivot joint also includes a limiting pin that is connected to the second rotating part and slides in the limiting groove. When the limiting pin abuts against the end of the limiting groove, the connecting member drives the seat plate and the fourth pivot part to rotate.

[0029] In one embodiment, the seat plate is provided with a handle.

[0030] In one embodiment, the vehicle further includes a pivot seat, and the first pivot joint further includes a first rotating part pivotally connected to the second pivot part around the first pivot axis, the first rotating part and the second rotating part being interconnected; the pivot seat includes the first rotating part and the second rotating part being interconnected, and a first release linkage mechanism is movably disposed within the pivot seat.

[0031] According to another aspect of this application, a trolley is also provided, comprising: the carrier as described in the foregoing embodiments; and a frame, wherein the carrier is detachably mounted on the frame, and a second linkage release mechanism moves to act on the frame, thereby allowing the frame to be folded. Attached Figure Description

[0032] The above and other objects, features, and advantages of this application will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the main points of this application.

[0033] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a perspective view of a trolley according to an embodiment of the present application, wherein the carrier and the frame are separated.

[0035] Figure 2 This is a perspective view of a vehicle according to one embodiment of this application.

[0036] Figure 3 This is a side view of a trolley according to an embodiment of the present application, wherein the vehicle is in seat mode.

[0037] Figure 4 This is a side view of a trolley according to an embodiment of the present application, wherein the vehicle is in sleeping box mode.

[0038] Figure 5 This is a side view of a trolley according to an embodiment of the present application, wherein the trolley is in a folded state.

[0039] Figure 6 According to Figure 5 The trolley shown is a perspective view.

[0040] Figure 7 This is an exploded view of a first pivot joint according to an embodiment of this application.

[0041] Figure 8 This is another exploded view of the first pivot joint according to an embodiment of this application.

[0042] Figure 9 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in sleeping box mode and the handle is in the initial state.

[0043] Figure 10 This is a side view of a vehicle according to one embodiment of the present application, wherein the vehicle is in seat mode and the handle has pivoted for a first pivot stroke.

[0044] Figure 11 for Figure 9 Enlarged view of part A in the middle.

[0045] Figure 12 for Figure 9 The vehicle shown is in a bottom view, with the first pivot joint in a locked position and shown in a cross-sectional view.

[0046] Figure 13 This is a perspective view of a vehicle according to one embodiment of the present application, in which some components of the first pivot joint have been removed to show its internal structure.

[0047] Figure 14 This is another perspective view of a vehicle according to one embodiment of the present application, in which the pivot and locking pin are removed to show the internal structure of the pivot and its engagement with the locking pin.

[0048] Figure 15 for Figure 10 Enlarged view of section B in the middle.

[0049] Figure 16 This is a bottom view of a vehicle according to an embodiment of the present application, wherein the first pivot joint is in a first unlocked state and is shown in cross-section.

[0050] Figure 17 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in the process of being retracted, and wherein the handle has pivoted for a second pivot stroke.

[0051] Figure 18 yes Figure 17 The diagram shows a perspective view of the vehicle with the pivot and locking pin removed to reveal the internal structure of the pivot and its engagement with the locking pin.

[0052] Figure 19 This shows an view taken along a direction approximately parallel to the seat plate. Figure 17 The vehicle shown is in a cross-sectional view, with the first pivot joint in a second unlocked state.

[0053] Figure 20 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in seat mode, and wherein the first pivot joint is shown in cross-section.

[0054] Figure 21 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in the process of being retracted, and wherein the first pivot joint is shown in cross-section.

[0055] Figure 22 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in a folded sleeping box mode, and wherein the first pivot joint is shown in cross-section.

[0056] Figure 23 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in the process of being retracted, and wherein the first pivot joint is shown in cross-section.

[0057] Figure 24 This is a perspective view of a vehicle according to an embodiment of the present application, wherein a portion of the pivot structure has been removed to show its internal structure.

[0058] Figure 25 This shows an view taken along a direction approximately parallel to the seat plate. Figure 24 The vehicle shown in the figure, wherein the first pivot joint and the second pivot joint are shown in cross-section.

[0059] Figure 26 This is a side view of a vehicle according to an embodiment of the present application, wherein the vehicle is in the process of being folded up.

[0060] Figure 27A cross-section along the axis of the first pivot joint and the axis of the second pivot joint is shown. Figure 26 A cross-sectional view of the vehicle shown.

[0061] Figure 28 This is an exploded view of a second pivot joint and pivot seat according to an embodiment of this application.

[0062] Figure 29 This is another exploded view of the second pivot joint and pivot seat according to an embodiment of this application.

[0063] Figure 30 yes Figure 28 Enlarged view of section C.

[0064] Figure 31 yes Figure 29 Enlarged view of section D in the middle.

[0065] Figure 32 This is an exploded view of an unlocking mechanism according to an embodiment of this application.

[0066] Figure 33 yes Figure 32 An exploded view of the mounting components and sliders shown from another perspective. Detailed Implementation

[0067] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0068] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0070] Please refer to the above. Figure 1 , Figures 2 to 6One embodiment of this application provides a trolley, including a carrier 1 and a frame 9, wherein the carrier 1 is detachably connected to a retraction joint 94 of the frame 9. The carrier 1 includes: a first pivot joint 20, a second pivot joint 30, a first linkage release mechanism 40, and a second linkage release mechanism 70 (see reference). Figure 28 (This will be explained in detail later), first frame 13 and second frame 14.

[0071] The first pivot joint 20 is fixedly connected to the first frame 13 and the second frame 14, and the first pivot joint 20 is pivotally connected to the second pivot joint 30 via the pivot seat 10. Optionally, the pivot seat 10 includes a first rotating part 11 and a second rotating part 12 fixedly connected to each other, the first pivot joint 20 includes the first rotating part 11, and the second pivot joint 30 includes the second rotating part 12. The second pivot joint 30 is detachably connected to the retraction joint 94 of the frame 9.

[0072] The frame 9 includes a rider 95, a front foot 96, and a rear foot 97, which are connected to each other via a retraction joint 94. A first linkage release mechanism 40 is connected to a first pivot joint 20 and a second pivot joint 30, and a second linkage release mechanism 70 is disposed within the second pivot joint 30.

[0073] When the vehicle 1 is deployed, the second frame 14 is fixed relative to the first frame 13. The first linkage release mechanism 40 locks the second pivot joint 30, restricting its pivoting. When the vehicle 1 is retracted, the pivoting of the second frame 14 relative to the first frame 13 drives the first linkage release mechanism 40 to release the second pivot joint 30, allowing it to pivot and driving its rotation. The pivoting of the second pivot joint 30 drives the second linkage release mechanism 70 to release the retraction joint 94 of the frame 9. Thus, by linking the retraction of the vehicle 1 with the pivoting of the second pivot joint 30, the retraction joint 94 of the frame 9 is released, thereby achieving the overall retraction of the vehicle 1 and the frame 9. Throughout the retraction process, the vehicle 1 does not need to be disassembled from the frame 9, making retraction simple and convenient.

[0074] Specifically, refer to Figure 7 and Figure 8In one embodiment, the first pivot joint 20 includes a first connecting seat 21 and a second connecting seat 22. The first connecting seat 21 and the second connecting seat 22 are connected to each other and configured to pivot coaxially with each other. Specifically, one end of the first connecting seat 21 is formed as a first pivot portion 211, and the other end of the first connecting seat 21 is fixedly connected to a first frame 13. Optionally, the first pivot portion 211 is formed as a generally circular structure. One end of the second connecting seat 22 is formed as a second pivot portion 221, and the other end of the second connecting seat 22 is fixedly connected to a second frame 14. Optionally, the second pivot portion 221 is formed as a generally circular structure. Those skilled in the art will understand that the first connecting seat 21 and the second connecting seat 22 are fixedly connected to the first frame 13 and the second frame 14, respectively. The first pivot 211 and the first frame 13 have the same motion state, and the second pivot 221 and the second frame 14 have the same motion state. Therefore, the description of the motion state of the first pivot 211 and the second pivot 221 in the following text also applies to the first frame 13 and the second frame 14, as well as the first connecting seat 21 and the second connecting seat 22.

[0075] In this embodiment, one side of the second pivot portion 221 is connected to the first pivot portion 211 and configured to pivot coaxially with each other, and the other side of the second pivot portion 221 is connected to the first rotating portion 11 and configured to pivot coaxially with each other. In the embodiment according to this application, the common pivot axis of the first pivot portion 211, the second pivot portion 221, and the first rotating portion 11 is defined as the first pivot axis L1, that is, the second pivot portion 221 and the first pivot portion 211 can pivot relative to each other around the first pivot axis L1, and the first pivot portion 211 can pivot relative to the first rotating portion 11 around the first pivot axis L1. The first pivot portion 211, the second pivot portion 221, and the first rotating portion 11 together form an accommodating space. In this embodiment, the first pivot axis L1 is defined as a virtual line connecting the centers of the first pivot portion 211 and the second pivot portion 221. Optionally, the first pivoting part 211, the second pivoting part 221 and the first rotating part 11 are connected together by a mounting pin 119, which extends along the first pivoting axis L1.

[0076] Continue to refer to Figure 7 and Figure 8In one embodiment, the first pivot joint 20 further includes a first locking member 23. Optionally, the first locking member 23 is configured as a generally disc-shaped structure and disposed in the receiving space. The first locking member 23 is movable between a locked position and an unlocked position along a direction parallel to the first pivot axis L1. Specifically, a first locking tooth 212 is provided on the inner side of the first pivot portion 211, a second locking tooth 222 is provided on the side of the second pivot portion 221 facing the first pivot portion 211, and a third locking tooth 231 is provided on the outer periphery of the first locking member 23. It should be noted that the term "inner side of the first pivot portion 211" in this document refers to the side of the first pivot portion 211 facing the receiving space. When the first locking member 23 moves such that the third locking tooth 231 simultaneously engages with the first locking tooth 212 and the second locking tooth 222, the first locking member 23 moves to the locked position. At this time, in the direction about the first pivot axis L1, the first locking member 23 restricts the relative pivoting of the first pivot portion 211 and the second pivot portion 221. When the first locking member 23 moves such that the third locking tooth 231 engages only with one of the first locking tooth 212 and the second locking tooth 222—for example, in this embodiment, when the first locking member 23 moves such that the third locking tooth 231 engages only with the first locking tooth 212—the first locking member 23 moves to the unlocked position. At this time, in the direction about the first pivot axis L1, the first locking member 23 no longer restricts the relative pivoting of the first pivot portion 211 and the second pivot portion 221; therefore, the second pivot portion 221 can pivot relative to the first pivot portion 211.

[0077] Continue to refer to Figure 7 and Figure 8 In one embodiment, the first pivot joint 20 further includes a first drive member 24 and a first elastic member 25. Optionally, the first drive member 24 is configured as a generally disk-shaped structure.

[0078] A first drive member 24 is disposed in the receiving space and configured to pivot about a first pivot axis L1. Specifically, the first drive member 24 is disposed on the side of the first locking member 23 away from the first pivot portion 211. A first push portion 241 is provided on the side of the first drive member 24 facing the first locking member 23, and the first push portion 241 has a first extension length in the direction about the first pivot axis L1. The side of the first locking member 23 facing the first drive member 24 is provided with a push surface 234 and a receiving groove 232 for receiving the first push portion 241, the receiving groove 232 being recessed from the push surface 234 toward the interior of the first locking member 23. The receiving groove 232 has a second extension length in the direction about the first pivot axis L1. Optionally, the extension length of the first extension length is equal to the extension length of the second extension length to allow the first push portion 241 to enter the receiving groove 232. Optionally, the extension length of the first extension length is less than the extension length of the second extension length. In such an embodiment, while the first push portion 241 is held within the receiving groove 232, the first drive member 24 is allowed to pivot relative to the first locking member 23 at a certain angle, the allowed pivot angle being equal to the angle corresponding to the difference between the first extension length and the second extension length.

[0079] The first elastic element 25 abuts against the first locking element 23 and continuously applies an elastic force to the first locking element 23, causing the first locking element 23 to tend to move toward the first driving element 24. It should be noted that all "elastic elements" in this application can be any suitable elastic device such as a compression spring, tension spring, torsion spring, or spring sheet, as long as it can provide elastic force. This application does not limit the specific type of elastic device. In this embodiment, the first elastic element 25 is a compression spring, with one end abutting against the inner side of the first pivot portion 211 and the other end abutting against the side of the first locking element 23 facing the first pivot portion 211, to bias the first locking element 23 toward the first driving element 24 (i.e., toward the direction away from the first pivot portion 211).

[0080] When the first drive member 24 pivots to allow the first push portion 241 to enter the receiving groove 232, the first elastic member 25 drives the first locking member 23 to move toward the first drive member 24, and the third locking tooth 231 reaches a position that simultaneously engages with the first locking tooth 212 and the second locking tooth 222, i.e., the locked position. When the first drive member 24 continues to pivot to disengage the first push portion 241 from the receiving groove 232, the first push portion 241 pushes against the push surface 234 of the first locking member 23, and the first locking member 23 overcomes the thrust of the first elastic member 25 and moves toward the first pivot portion 211, thereby disengaging the third locking tooth 231 from the second locking tooth 222, and the first locking member 23 enters the unlocked position, and the first locking member 23 moves from the locked position toward the unlocked position in a direction away from the first drive member 24. Optionally, the outer surface of the first pushing part 241 is provided with a first inclined surface 242, and the groove wall of the receiving groove 232 is provided with a second inclined surface 233. During the process of the first pushing part 241 disengaging from the receiving groove 232, the first inclined surface 242 and the second inclined surface 233 contact each other and slide relative to each other to guide the first pushing part 241 to disengage from the receiving groove 232. In other embodiments, only the first pushing part 241 may be provided with the first inclined surface 242, and the first inclined surface 242 may contact each other and slide relative to each other with the groove edge of the receiving groove 232 to guide the first pushing part 241 to disengage from the receiving groove 232; or only the receiving groove 232 may be provided with the second inclined surface 233, and the second inclined surface 233 may contact each other and slide relative to each other with the outer surface of the first pushing part 241 to guide the first pushing part 241 to disengage from the receiving groove 232.

[0081] Continue to refer to Figure 7 and Figure 8In one embodiment, the first pivot joint 20 further includes a second locking member 26 and a second elastic member 271. The second locking member 26 is disposed in the receiving space. The second locking member 26 is movably connected to the second connecting seat 22. Specifically, the second locking member 26 is arranged to be fixed relative to the second connecting seat 22 in the direction about the first pivot axis L1 and is movable relative to the second connecting seat 22 in a direction parallel to the first pivot axis L1. Optionally, the second pivot portion 221 is also fixedly provided with a bracket 29 in the receiving space, that is, the bracket 29 is fixed relative to the second connecting seat 22 in the direction about the first pivot axis L1. The bracket 29 is provided with a mounting hole 291 extending along the first pivot axis L1, and the second locking member 26 passes through the mounting hole 291 to realize that the second locking member 26 is fixed relative to the bracket 29 (i.e., fixed relative to the second connecting seat 22) in the direction about the first pivot axis L1 and movable relative to the bracket 29 in a direction parallel to the first pivot axis L1. Those skilled in the art will understand that the second locking member 26 can also be fixed relative to the bracket 29 in the direction about the first pivot axis L1 and moved relative to the bracket 29 in a direction parallel to the first pivot axis L1 by other suitable means.

[0082] The second locking member 26 has an abutting end 261 that abuts against the first driving member 24 and a locking end 262 opposite to the abutting end 261. The second locking member 26 and the first locking member 23 are located on opposite sides of the first driving member 24 in a direction parallel to the first pivot axis L1. A first locking hole 111 (see reference) is provided on the inner side of the first rotating part 11 for accommodating the locking end 262. Figure 12It should be noted that the term "inner side of the first rotating part 11" in this document refers to the side of the first rotating part 11 facing the receiving space. When the locking end 262 enters the first locking hole 111, the second locking member 26 restricts the relative pivoting of the second pivot part 221 and the first rotating part 11, at which time the second locking member 26 is in the locked position. The second elastic element 271 is sleeved on the second locking element 26. The second elastic element 271 continuously applies an elastic force to the second locking element 26, causing the second locking element 26 to continuously press against the first driving element 24. Therefore, the second elastic element 271 causes the second locking element 26 to have a tendency to disengage from the first locking hole 111. When the second locking element 26 disengages from the first locking hole 111, it is defined that the second locking element 26 is in the unlocked position. The second locking element 260 can rotate relative to the first rotating part 11 with the second pivot part 221. It can be seen that the second locking element 26 moves from the locked position toward the direction closer to the first driving element 24 to the unlocked position. At the same time, it can be seen that the second elastic element 271 has a tendency to drive the second locking element 26 from the locked position to the unlocked position. In one embodiment, the second locking element 26 is provided in the shape of a pin and extends in a direction parallel to the first pivot axis L1. The pin-shaped second locking element 26 is defined as the first locking pin 260 (hereinafter referred to as the first locking pin 260).

[0083] Continue to refer to Figure 7 and Figure 8 In one embodiment, the first driving member 24 is provided with a first abutting surface 247, a second abutting surface 243 and a third abutting surface 244 on the side opposite to the first locking member 23 for abutting the abutting end 261. The second abutting surface 243 and the third abutting surface 244 are both recessed from the first abutting surface 247 toward the side away from the second locking member 26, and the depth of the third abutting surface 244 is greater than the depth of the second abutting surface 243.

[0084] Reference Figure 12 and Figure 13 When the first driving member 24 is in the first position, the first pushing part 241 is accommodated in the receiving groove 232, the first locking member 23 is in the locked position, for example, the first locked position, and the abutting end 261 of the first locking pin 260 abuts against the first abutting surface 247 of the first driving member 24, the locking end 262 of the first locking pin 260 is accommodated in the first locking hole 111, and the second locking member 26 is in the locked position, such as... Figure 12 As shown. At this time, the first pivot joint 20 is in a locked state, the third locking tooth 231 engages with the first locking tooth 212 and the second locking tooth 222 at the same time, the first connecting seat 21 and the second connecting seat 22 cannot pivot, and the second pivot part 221 cannot pivot relative to the first rotating part 11.

[0085] Reference Figure 13 and Figure 16When the first driving member 24 pivots from the first position to the second position, the pivot angle of the first driving member 24 is not greater than the angle corresponding to the difference between the first extension length and the second extension length. The first pushing part 241 is still accommodated in the receiving groove 232. At this time, the first locking member 23 is still in the locked position, for example, the first locked position, that is, when the first driving member 24 pivots from the first position to the second position, the position of the first locking member 23 does not change. Optionally, when the first driving member 24 pivots from the first position to the second position, the first inclined surface 242 pushes the second inclined surface 233, causing the first locking member 23 to move a certain distance toward the first pivoting part 211, and the third locking tooth 231 of the first locking member 23 is still engaged with the first locking tooth 212 and the second locking tooth 222 at the same time. At this time, the first locking member 23 is still in the locked position, but it is the second locked position, not the first locked position. In other words, the first locking member 23 in the second locking position is closer to the first pivot 211 than the first locking member 23 in the first locking position. Therefore, the locking positions of the first locking member 23 include the first locking position and the second locking position.

[0086] When the first driving member 24 pivots from the first position to the second position, the abutting end 261 of the first locking pin 260 aligns with the second abutting surface 243 of the first driving member 24 in a direction parallel to the first pivot axis L1. The second elastic member 271 drives the abutting end 261 to abut against the second abutting surface 243, causing the locking end 262 of the first locking pin 260 to disengage from the first locking hole 111, and the second locking member 26 is in the unlocked position, for example, the first unlocked position. At this time, the first pivot joint 20 switches from the locked state to the first unlocked state. The first connecting seat 21 and the second connecting seat 22 can pivot together around the first pivot axis L1 relative to the first rotating part 11, and the third locking tooth 231 remains engaged with the first locking tooth 212 and the second locking tooth 222. The first connecting seat 21 and the second connecting seat 22 cannot pivot relative to each other, and the first connecting seat 21 and the second connecting seat 22 are relatively fixed. When the first pivot joint 20 is in the first unlocked state, the first frame 13 and the second frame 14 can pivot as a whole relative to the first rotating part 11 around the first pivot axis L1 without relative pivoting, thereby enabling the vehicle 1 to switch between sleeping box mode and seat mode. In this application, the term "sleeping box mode" refers to a state in which the first frame 13 and the second frame 14 are approximately in the same plane and pivoted to a generally horizontal position, as shown in the reference. Figure 4 and Figure 9 The term "seat mode" refers to a state in which the first frame 13 and the second frame 14 are approximately on the same plane and pivoted at an angle relative to the horizontal plane. (Refer to...) Figure 3 and Figure 10Those skilled in the art can set this angle according to actual needs, such as 30°, 45°, etc. That is, when the first connecting seat 21 and the second connecting seat 22 are relatively fixed, the first frame 13 and the second frame 14 are roughly on the same plane and are in an unfolded state. The first frame 13 and the second frame 14 in the unfolded state include a "sleeping box mode" and a "seat mode".

[0087] refer to Figure 14 Optionally, a second locking hole 113 is also provided on the inner side of the first rotating part 11. In the direction around the first pivot axis L1, the second locking hole 113 is spaced apart from the first locking hole 111. The function of the second locking hole 113 is the same as that of the first locking hole 111, that is, when the locking end 262 of the first locking pin 260 is accommodated in the second locking hole 113, the second locking member 26 is in the locked position; when the locking end 262 of the first locking pin 260 is disengaged from the second locking hole 113, the second locking member 26 is in the unlocked position. Optionally, when the first frame 13 and the second frame 14 are pivoted together around the first pivot axis L1 so that the first locking pin 260 is aligned with the first locking hole 111, the vehicle 1 reaches the sleeping box mode; when the first frame 13 and the second frame 14 are pivoted together around the first pivot axis L1 so that the first locking pin 260 is aligned with the second locking hole 113, the vehicle 1 reaches the seat mode. Optionally, more than two second locking holes can be provided, thereby defining multiple sets of seat modes or reclining modes with different tilt angles between the sleeping box mode and the seat mode.

[0088] Reference Figure 13 and Figure 19 When the first driving member 24 pivots from the second position to the third position, since the pivot angle of the first driving member 24 is greater than the angle corresponding to the difference between the first extension length and the second extension length, the first pushing part 241 disengages from the receiving groove 232 and pushes the pushing surface 234 of the first locking member 23, causing the first locking member 23 to enter the unlocked position, and the abutting end 261 of the first locking pin 260 aligns with the third abutting surface 244 of the first driving member 24 in a direction parallel to the first pivot axis L1. Under the action of the elastic force of the second elastic member 271, the abutting end 261 abuts against the third abutting surface 244. At this time, the second locking member 26 is still in the unlocked position, specifically the second unlocked position. At this time, the first pivot joint 20 switches from the first unlocked state to the second unlocked state, and the first connecting seat 21 and the second connecting seat 22 can pivot relative to the first rotating part 11 around the first pivot axis L1, and the first connecting seat 21 and the second connecting seat 22 can pivot relative to each other. When the first pivot joint 20 is in the second unlocked state, the user can pivot the second frame 14 toward the first frame 13 to close the vehicle 1.

[0089] refer to Figure 14 In one embodiment, a limiting part 112 is also provided on the inner side of the first rotating part 11, and the limiting part 112 protrudes from the inner side of the first rotating part 11. When the first driving member 24 pivots to the second position, the first pivot joint 20 enters the first unlocking state, and the first frame 13 and the second frame 14 can pivot as a whole around the first pivot axis L1. At this time, the second elastic member 271 drives the abutment end 261 to abut the second abutment surface 243, and the locking end 262 of the first locking pin 260 disengages from the first locking hole 111. The second locking member 26 can rotate relative to the first rotating part 11 with the second pivoting part 221. The distance between the locking end 262 and the inner side of the first rotating part 11 is less than the height of the limiting part 112 protruding from the inner side of the first rotating part 11, and the limiting part 112 is located in the direction in which the second locking member 26 rotates around the first pivoting axis L1, thus preventing the second locking member 26 from rotating relative to the first rotating part 11, and further preventing the relatively fixed second pivoting part 221 and first pivoting part 211 from rotating relative to the first rotating part 11. Therefore, when the first frame 13 and the second frame 14 pivot as a whole to the point where the first driving pin 260 abuts the end of the limiting part 112, the overall pivoting of the first frame 13 and the second frame 14 is restricted. By setting the limiting part 112, excessive overall pivoting of the first frame 13 and the second frame 14 can be avoided.

[0090] Optionally, in the direction surrounding the first pivot axis L1, the second locking hole 113 is disposed between the first locking hole 111 and the limiting part 112, and the end of the limiting part 112 is positioned adjacent to the second locking hole 113. Thus, when the first frame 13 and the second frame 14 are pivoted to the seat mode, the first locking pin 260 abuts against the end of the limiting part 112, preventing the user from continuing to rotate the first frame 13 and the second frame 14, which are located on the same horizontal plane, in a direction that would make the vehicle 1 more tilted. This would prevent children riding in the vehicle 1 from falling due to excessive tilting of the first frame 13 and the second frame 14, and would also prevent the first frame 13 and the second frame 14, which are located on the same horizontal plane, from continuing to pivot, causing the first frame 13 and the second frame 14 to interfere with other components of the vehicle 1, such as the seat plate 60.

[0091] Reference Figure 13 , Figure 14 and Figure 19In one embodiment, in order for the second locking member 26 to pass over the limiting part 112 so that the second frame 14 can retract relative to the first frame 13, the first driving member 24 needs to pivot to a third position, thereby allowing the first pivot joint 20 to enter a second unlocking state. The third abutment surface 244 has a greater depth than the second abutment surface 243. After the abutment end 261 of the first locking pin 260 abuts against the third abutment surface 244, the distance between the locking end 262 and the inner side of the first rotating part 11 is greater than the height of the limiting part 112 protruding from the inner side of the first rotating part 11. The first locking pin 260 can pass over the limiting part 112, and the limiting part 112 no longer restricts the pivoting of the second pivot part 221 (second frame 14). That is, the limiting part 112 is no longer located on the stroke of the second locking member 26 rotating around the first pivot axis L1.

[0092] refer to Figure 14 In the illustrated embodiment, the limiting part 112 extends along the direction surrounding the first pivot axis L1, and the height of the end of the limiting part 112 near the second locking hole 113 protruding from the inside of the first rotating part 11 is greater than the height of the end of the limiting part 112 away from the second locking hole 113 protruding from the inside of the first rotating part 11. Furthermore, the height of the end of the limiting part 112 away from the second locking hole 113 protruding from the inside of the first rotating part 11 is still slightly greater than the distance between the locking end 262 of the first locking pin 260 and the inside of the first rotating part 11 after the abutting end 261 of the first locking pin 260 abuts the second abutting surface 243. This ensures that when the first locking pin 260 moves from the end of the limiting part 112 away from the second locking hole 113 to the end of the limiting part 112 near the second locking hole 113, that is, when the second frame 14 unfolds relative to the first frame 13, there will be no significant obstruction.

[0093] For the first pivoting part 211 (first frame 13), in order to avoid excessive pivoting and interference with other components, please refer to the following: Figure 7 , Figure 8 , Figure 22 and Figure 23In one embodiment, a first stop portion 213 protruding from the inner side of the first pivot portion 211 is provided on the inner side of the first pivot portion 211, and a limiting post 114 is also provided on the inner side of the first rotating portion 11. The limiting post 114 protrudes from the inner side of the first rotating portion 11, and a second stop portion 118 is provided at one end of the limiting post 114 away from the inner side of the first rotating portion 11. When the first frame 13 pivots to the point where the first side of the first stop portion 213 abuts against the first side of the second stop portion 118, the first frame 13 pivots to the first limit position; when the first frame 13 rotates to the point where the second side of the first stop portion 213 abuts against the second side of the second stop portion 118, the first frame 13 reaches the second limit position; thereby, the pivoting of the first frame 13 is restricted between the first limit position and the second limit position by the abutment of the first stop portion 213 and the second stop portion 118. Optionally, when the first frame 13 pivots to a substantially horizontal position, i.e. in sleeping box mode, the first frame 13 reaches a first extreme position; when the first frame 13 pivots to a pivot position in seat mode, the first frame 13 reaches a second extreme position.

[0094] refer to Figure 13 In one embodiment, the first pivot joint 20 further includes a third elastic member 272. The third elastic member 272 is disposed in the receiving space and abuts against the first drive member 24 and the second pivot portion 221 to continuously apply an elastic force to the first drive member 24, causing the first drive member 24 to have a tendency to pivot in a direction toward a first position. Optionally, a third inclined surface 245 is provided on the side of the second abutment surface 243 opposite to the third abutment surface 244. The second abutment surface 243 is connected to the first abutment surface 247 via the third inclined surface 245, and the second abutment surface 243 is connected to the third abutment surface 244 via a fourth inclined surface 246. Both the third inclined surface 245 and the fourth inclined surface 246 extend in a direction surrounding the first pivot axis L1 and are inclined relative to a direction parallel to the first pivot axis L1. When the first pivot joint 20 is in the first unlocked state, the abutting end 261 of the first locking pin 260 abuts against the second abutting surface 243. When the first connecting seat 21 and the second connecting seat 22 pivot around the first pivot axis L1 so that the locking end 262 of the first locking pin 260 is aligned with the first locking hole 111 or the second locking hole 113 of the first driving member 24 in a direction parallel to the first pivot axis L1, the third elastic member 272 drives the first driving member 24 to pivot in the direction of the first position. The third inclined surface 245 pushes against and drives the first locking pin 260 to move in the direction away from the first driving member 24 until the first abutting surface 247 pushes against and drives the locking end 262 to enter the second locking hole 113. The first driving member 24 returns to the first position, and the first pivot joint 20 returns to the locked state.

[0095] refer to Figure 13 and Figure 14When the first pivot joint 20 is in the second unlocked state, the abutting end 261 of the first locking pin 260 abuts against the third abutting surface 244. When the first connecting seat 21 and the second connecting seat 22 pivot about the first pivot axis L1 such that the locking end 262 of the first locking pin 260 is aligned with the portion of the limiting part 112 other than the end near the second locking hole 113 in a direction parallel to the first pivot axis L1, the third elastic member 272 drives the first driving member 24 to pivot towards the second position, and the fourth inclined surface 246 pushes against and drives the first locking pin 260 towards the direction away from the first driving member 24. The first locking pin 260 moves to a point where its locking end 262 abuts against the fourth inclined surface 246; or when the first connecting seat 21 and the second connecting seat 22 pivot about the first pivot axis L1 to such that the locking end 262 of the first locking pin 260 is aligned with the inner side of the first rotating part 11 in a direction parallel to the first pivot axis L1, the third elastic member 272 drives the first driving member 24 to pivot toward the second position, and the fourth inclined surface 246 pushes against and drives the first locking pin 260 to move toward the direction away from the first driving member 24, so that the locking end 262 of the first locking pin 260 approaches the inner side of the first rotating part 11.

[0096] As can be seen, through the third inclined surface 245 and the fourth inclined surface 246, the first driving member 24 rotates from the third position to the second position and then to the first position, driving the third inclined surface 245 and the fourth inclined surface 246 to abut against the abutting end 261 of the first locking pin 260 and rotate relative to the abutting end 261 of the first locking pin 260, thereby driving the second locking member 26 to move from the second unlocking position to the first unlocking position and then to the locking position.

[0097] As can be seen from the above, the first driving member 24 rotates from the first position to the third position, driving the first locking member 23 to move from the first locked position to the second locked position (if any), and then to the unlocked position. The first driving member 24 rotates from the third position to the first position, driving the second locking member 26 to move from the second unlocked position to the first unlocked position, and then to the locked position.

[0098] refer to Figure 9 , Figure 11 and Figure 12In one embodiment, to enable a user to operate and pivot the first drive member 24, the vehicle 1 is further provided with a release mechanism 50. The user can drive the pivoting of the first drive member 24 by operating the release mechanism 50. The release mechanism 50 includes a handle 52 and a traction member 51. The handle 52 is pivotally mounted on the vehicle 1, for example, on the second frame 14. It should be understood that mounting the handle 52 on the second frame 14 is merely an exemplary embodiment of this application; those skilled in the art can mount the handle 52 at other suitable locations on the vehicle 1, such as the first frame 13, armrest 283, seat plate 60, etc., according to actual needs. One end of the traction member 51 is connected to the first drive member 24, and the handle 52 is operably indirectly connected to the other end of the traction member 51. The handle 52 has a first pivot stroke and a second pivot stroke. When the handle 52 pivots for the first pivot stroke, the handle 52 drives the first driving member 24 from the first position to the second position via the traction member 51; when the handle 52 pivots for the second pivot stroke, the handle 52 drives the first driving member 24 from the first position to the third position via the traction member 51, and the second pivot stroke is greater than the first pivot stroke. Optionally, the traction member 51 is a driving steel wire. It is understood that the driving steel wire is only one optional embodiment of this application, and those skilled in the art can select a suitable traction member according to actual needs.

[0099] refer to Figure 15 and Figure 17 Optionally, the release mechanism 50 may further include a safety push button 56. The second frame 14 is provided with a stop 55. The safety push button 56 is disposed in a groove 53 on the handle 52 and is movable between a first moving position and a second moving position within the groove 53. When the safety push button 56 is in the first moving position, when the handle 52 pivots for a first pivot stroke, the safety push button 56 abuts against the stop 55 to prevent the handle 52 from continuing to pivot. At this time, it is suitable for switching between the sleeping box mode and the seat mode. The safety push button 56 abuts against the stop 55 to prevent the user from excessively pivoting the handle 52, causing the first pivot joint 20 to mistakenly enter the second release state. When the safety push button 56 is in the second moving position, when the handle 52 pivots for a first pivot stroke, the safety push button 56 does not abut against the stop 55, allowing the handle 52 to continue pivoting until the second pivot stroke is completed, causing the first pivot joint 20 to enter the second release state to close the carrier 1. Optionally, a fourth elastic element 54 is provided in the groove 53. The fourth elastic element 54 continuously applies an elastic force to the safety push button 56, so that the safety push button 56 has a tendency to move toward the first moving position, thereby preventing the safety push button 56 from being forgotten in the second moving position.

[0100] Please refer to the above. Figure 15 , Figure 17 , Figure 32 and Figure 33 In one embodiment according to this application, the pull handle 52 is mounted on the second frame 14 via a mounting member 58. The pull handle 52 is operatively connected to a slider 57 disposed within the second frame 14. The slider 57 is connected to the first drive member 24 via a traction member 51. (Continuing to refer to...) Figure 33 A guide groove 571 is provided on the side of the slider 57 facing the pull handle 52, and a guide part 521 is provided on the side of the pull handle 52 facing the slider 57. The guide part 521 fits into the guide groove 571. The shapes of the guide part 521 and the guide groove 571 are configured such that when the pull handle 52 moves from the slider 57 to the pull handle 52, the slider 57 is pulled from the pull handle 52 to the pull handle 52. Figure 11 Pivot to the position shown Figure 17 When the position shown is reached, the guide portion 521 pushes against the guide groove 571 to drive the slider 57 to move. The movement of the slider 57 drives the first drive member 24 to pivot via the traction member 51. Specifically, in this embodiment, the pull handle 52 is provided with two guide portions 521 that are opposite to each other, and two sliders 57 are provided in the second frame 14. The two guide portions 521 respectively cooperate with the two sliders 57. When the pull handle 52 moves from the position shown, the guide portion 521 pushes against the guide groove 571 to drive the slider 57 to move. Figure 11 Pivot to the position shown Figure 17 When in the position shown, the two guide parts 521 respectively push against the guide grooves 571 of the two drive sliders 57 to drive the two sliders 57 to move away from each other.

[0101] Reference Figure 17 and Figure 19 When the lever 52 pivots to Figure 17 In the state shown (pivoted for the second pivot stroke), the user pushes the second frame 14 toward the first frame 13. The second locking tooth 222 in the second pivot portion 221 is misaligned with the third locking tooth 231 of the first locking member 23, and the first locking member 23 cannot return to the second pivot portion 221. Thus, the second frame 14 can maintain a pivotable state relative to the first frame 13. The first locking pin 260 will no longer pivot to a position aligned with the first locking hole 111 or the second locking hole 113. Therefore, under the action of the third elastic member 272, the abutting end 261 of the first locking pin 260 abuts against the fourth inclined surface 246, the second abutting surface 243, or the third abutting surface 244, but cannot abut against the third inclined surface 245 or the first abutting surface 247. The locking end 262 of the first locking pin 260 abuts against the inner side of the limiting portion 112 or the first rotating portion 11. Thus, the second frame 14 can maintain a pivotable state relative to the first rotating portion 11.

[0102] Please refer to the above. Figure 20 and Figure 21In an embodiment with a bracket 29, the bracket 29 has a through hole 292 extending along the direction of the first pivot axis L1. The limiting post 114 protrudes from the inner side of the first rotating part 11 along the direction of the first pivot axis L1 and passes through the through hole 292. At least a portion of the circumferential surface 115 of the limiting post 114 is recessed to form a notch 116. The notch 116 has a stop surface 117. The angle between the stop surface 117 and the first pivot axis L1 is almost 90°, and can be in the range of 75° to 85°. The bracket 29 is also provided with a third locking hole 293 communicating with the through hole 292. The third locking hole 293 is provided on the hole wall of the through hole 292 and extends along a direction perpendicular to the first pivot axis L1. A fourth locking member 294 and a fifth elastic member 297 are provided in the third locking hole 293. The fourth locking member 294 is movably connected to the second pivot part 221. Specifically, the fourth locking member 294 is fixed relative to the second pivot part 221 in the direction around the first pivot axis L1, while the fourth locking member 294 can move relative to the second pivot part 221 in a direction perpendicular to the first pivot axis L1. The fourth locking member 294 rotates with the second pivot part 221 relative to the limiting post 114. The fifth elastic member 297 biases the fourth locking member 294 so that the fourth locking member 294 abuts against the circumferential surface 115 of the limiting post 114 along the extension direction of the third locking hole 293. When the first drive member 24 is in the second position and the limiting post 114 and the second locking member 26 abut against each other in the direction about the first pivot axis L1, the fourth locking member 294 abuts against the stop surface 117 of the recess 116 in the direction about the first pivot axis to restrict the switching from the seat mode to the folded state. When the first drive member 24 is in the third position and the second frame 14 rotates and folds relative to the first frame 13, the fourth locking member 294 is offset from the stop surface 117 in the direction about the first pivot axis L1 and moves to the outside of the stop surface 117. The term "folded state" or "folded" in this application refers to a state where the angle between the first frame 13 and the second frame 14 is less than 180°. Since the angle between the stop surface 117 and the first pivot axis L1 is almost 90°, the fourth locking member 294 can only disengage from the notch 116 and stop abutting the stop surface 117 when the user applies excessive force to the second frame 14. This better prevents the second frame 14 from accidentally switching from the seat mode to the folded state. By setting the fourth locking member 294 and the stop surface 117, the user is provided with tactile and auditory feedback during operation to indicate that the user is in the folded state.

[0103] Optionally, the end of the fourth locking member 294 is provided with a first guide ramp 295 and a second guide ramp 296 connected to each other. In the direction of moving from the sleeping box mode to the seat mode, when the bracket 29 pivots around the first pivot axis L1, the first guide ramp 295 abuts against the circumferential surface 115 of the limiting post 114 to reduce the contact area between the fourth locking member 294 and the circumferential surface 115. The curvature of the circumferential surface 115 of the limiting post 114 gradually decreases towards the recess 116 to guide the fourth locking member 294 to move into the recess 116, so that the second frame 14 can switch from the horizontal sleeping box mode state to the inclined seat mode state. When changing from the seat mode to the folded state, the second guide ramp 296 abuts against the stop surface 117 of the recess 116 to guide the fourth locking member 294 to disengage from the recess 116 and no longer abut against the stop surface 117. For example, during the pivoting of the first pivot joint 20 from the folded state to the seated state, under the action of the fifth elastic member 297, the fourth locking member 294 continuously applies a pushing force to the circumferential surface 115 of the limiting post 114. With the cooperation of the first guide ramp 295 and the circumferential surface 115 of the limiting post 114, this pushing force facilitates pivoting, so the user can feel the effortless pivoting through touch. For example, when the first pivot joint 20 pivots to the seated state, when the fourth locking member 294 enters the recess 116, the user can clearly feel the locking sensation and hear the click, which helps to indicate to the user that the seat has been fully extended. For example, when switching from the seated state to the folded state, the user applies a certain amount of external force to allow the second guide ramp 296 to cross the stop wall 117 of the recess 116. During the crossing process, there will be a clear tactile sensation and the sound of material deformation and recovery, which helps to indicate to the user that the seat has been removed from the extended position.

[0104] Please refer to the above. Figure 7 , Figure 8 , Figure 22 and Figure 23In one embodiment, the first pivot joint 20 further includes a third connecting seat 28. One end of the third connecting seat 28 is formed as a third pivot portion 281, which is pivotally connected between the first pivot portion 211 and the second pivot portion 221 around the first pivot axis L1. The other end of the third connecting seat 28 is fixedly connected to other accessories, such as an armrest 283. To lock the pivot position of the third connecting seat 28, optionally, a first positioning portion 214 is provided on the inner side of the first pivot portion 211, a second positioning portion 223 is provided on the side of the second pivot portion 221 facing the first pivot portion 211, and the third pivot portion 281 is provided with an arc-shaped movable groove 282. The first positioning portion 214 and the second positioning portion 223 can move within the movable groove 282 around the first pivot axis L1. When the two ends of the movable groove 282 in its extension direction simultaneously abut against the first positioning part 214 and the second positioning part 223, the third pivot part 281, the first pivot part 211 and the second pivot part 221 pivot and fix each other, and can rotate synchronously relative to the first rotating part 11. For example, when the first pivot part and the second pivot part are relatively fixed, the ends of the movable groove 282 abut against the first positioning part 214 and the second positioning part 223 simultaneously. If the first pivot joint 20 is in the first unlocked state, the third pivot part 281 (armrest 283) and the second pivot part 221 (second frame 14) can be driven to pivot as a whole by pivoting the first pivot part 211 (first frame 13) to realize the switching of the vehicle 1 between the sleeping box mode and the seat mode. If the first pivot joint 20 is in the locked state, the third pivot part 281 cannot pivot. When the second frame 14 retracts toward the first frame 13, the distance between the first positioning part 214 and the second positioning part 223 in the direction around the first pivot axis L1 gradually decreases, and the end of the second positioning part 223 no longer abuts against the movable groove 282. The armrest 283 retracts toward the first frame 13 due to gravity, causing the end of the movable groove 282 to move to abut against the second positioning part 223 again.

[0105] Please refer to the above. Figure 24 , Figure 28 and Figure 29In one embodiment, the second pivot joint 30 is spaced apart from the first pivot joint 20. The second pivot joint 30 includes a fourth pivot portion 31. Optionally, the fourth pivot portion 31 is configured as a generally disc-shaped structure. The fourth pivot portion 31 has a pivot side 311 and a mounting side 312 opposite to the pivot side 311. The pivot side 311 is coaxially connected to the second rotating portion 12 of the pivot seat 10 and is capable of pivoting about a second pivot axis L2. The second pivot axis L2 is not collinear with the first pivot axis L1. Optionally, the second pivot axis L2 is parallel to the first pivot axis L1. Optionally, the second rotating portion 12 is configured as a generally disc-shaped structure. In this embodiment, the second pivot axis L2 is defined as a virtual line connecting the centers of the fourth pivot portion 31 and the second rotating portion 12. The second pivot portion 221 includes a triggering device 41, and the first linkage release mechanism 40 includes a locking device 42. The locking device 42 is detachably connected to the fourth pivot 31 to lock or release the pivoting of the fourth pivot 31 relative to the second rotating part 12. Contact and disengagement between the triggering device 41 and the locking device 42 respectively drive the locking and unlocking of the locking device 42. Optionally, the triggering device 41 is a first pushing part 411 provided on the outer peripheral surface 224 of the second pivot 221, extending around the first pivot axis L1. The pivot seat 10 is provided with a pushing groove 15, positioned such that pivoting of the second pivot 221 allows the first pushing part 411 to enter or disengage from the pushing groove 15. Optionally, the locking device 42 includes a locking member 421 and a sixth elastic member 425. The locking member 421 has a locking part 422 and a second driving part 423, and is movably disposed within the second pivot joint 30. The pivot side 311 of the fourth pivot portion 31 is provided with a fourth locking hole 424. The locking part 422 can enter or disengage from the fourth locking hole 424 to lock or release the pivoting of the fourth pivot portion 31 relative to the second rotating portion 12. A sixth elastic member 425 is disposed between the pivot seat 10 and the locking member 421 and continuously applies an elastic force to the locking member 421, causing the locking member 421 to have a tendency to disengage from the fourth locking hole 424. When the first pushing part 411 enters the pushing groove 15 and contacts the locking member 421, the first pushing part 411 drives the locking part 422 of the locking member 421 to enter the fourth locking hole 424; when the triggering device 41 disengages from the locking member 421, the sixth elastic member 425 drives the locking member 421 to disengage from the fourth locking hole 424. Optionally, the first linkage release mechanism 40 further includes a second driving member 43.The second driving member 43 is movably disposed between the first pivot joint 20 and the second pivot joint 30, specifically in the pivot seat 10. The second driving member 43 has an abutment portion 431 and a first driving portion 432 that are opposite to each other. When the first pushing portion 411 enters the pushing groove 15 and abuts the abutment portion 431, the first driving portion 432 pushes against the second driving portion 423, thereby driving the locking portion 422 of the locking member 421 to enter the fourth locking hole 424. At this time, the second pivot joint 30 is in a locked state, and the fourth pivot portion 31 cannot pivot relative to the second rotating portion 12. When the first pushing part 411 completely disengages from the pivot seat 10 after passing through the pushing groove 15, the first pushing part 411 disengages from the abutment part 431 of the second driving member 43. The sixth elastic member 425 drives the locking member 421 to disengage from the fourth locking hole 424 and drives the second driving part 423 to push against the first driving part 432, thereby driving the second driving member 43 to move away from the locking member 421. At this time, the second pivot joint 30 switches from the locked state to the unlocked state, and the fourth pivot part 31 can pivot relative to the second rotating part 12. Optionally, the first linkage unlocking mechanism 40 further includes a seventh elastic member 44, which continuously applies an elastic force to the second driving member 43, causing the second driving member 43 to have a tendency to move away from the locking device 42. When the first pushing part 411 disengages from the abutment part 431 of the second driving member 43, the seventh elastic member 44 drives the second driving member 43 to move away from the locking device 42.

[0106] refer to Figure 10 and Figure 17 When the second frame 14 and the first frame 13 are in the unfolded state, that is, when the first pivot 211 and the second pivot 221 are relatively fixed, whether in the seat mode or the sleeping box mode, the first push part 411 is at least partially housed in the push groove 15 and is used to abut the abutment part 431, and the second pivot joint 30 is still in the locked state. When the second frame 14 is folded and closed toward the first frame 13, that is, when the second pivot 221 rotates relative to the first pivot 211, the first push part 411 completely disengages from the push groove 15, so that the second pivot joint 30 switches from the locked state to the unlocked state.

[0107] The moving direction of the second driving member 43 intersects with the rotation direction of the first pushing part 411 of the second pivot part 221 and the moving direction of the locking member 421. Specifically, the second driving member 43 moves in a direction perpendicular to the first pivot axis L1 and the second pivot axis L2, and the locking member 421 moves in a direction parallel to the second pivot axis L2.

[0108] Please refer to the above. Figure 25 , Figure 27 , Figure 30 and Figure 31In one embodiment, the second pivot joint 30 further includes a mounting base 32 pivotally connected to the side of the second rotating part 12 opposite to the fourth pivot part 31. The mounting base 32 is detachably mounted on a snap-fit ​​seat 91 of the frame 9. The snap-fit ​​seat 91 is disposed on the retraction joint 94 of the frame 9. Optionally, the mounting base 32 is provided with a snap-fit ​​part 323 and a quick-release switch 324, and the snap-fit ​​seat 91 is provided with a snap-fit ​​hole 93 for snapping the snap-fit ​​part 323 (see reference). Figure 1 The quick-release switch 324 is used to release the engagement between the latching part 323 and the latching hole 93.

[0109] In this embodiment, the pivot side 311 of the fourth pivot portion 31 is provided with a second pushing portion 45. The second pushing portion 45 is a generally cylindrical boss protruding from the pivot side 311, and at least a portion of the circumferential sidewall of the boss is recessed to form a first pushing slope 451. The second linkage release mechanism 70 includes a third locking member 46 and a release portion 463. The third locking member 46 is configured as a generally disc-shaped structure and is provided with a mounting through hole 464. The second pushing portion 45 is inserted into the mounting through hole 464 so that the third locking member 46 is sleeved on the second pushing portion 45. A second pushing slope 461 that mates with the first pushing slope 451 is provided in the mounting through hole 464. Both the first pushing slope 451 and the second pushing slope 461 extend in a direction around the second pivot axis L2 and are inclined relative to a direction parallel to the second pivot axis L2. In other embodiments, only the first pushing slope 451 or the second pushing slope 461 may be provided.

[0110] The third locking member 46 is configured to move between a pivot position and a stop position along the second pivot axis L2. Optionally, the inner ring of the second rotating part 12 is provided with a fourth locking tooth 121, the inner ring of the mounting base 32 is provided with a fifth locking tooth 321, and the outer periphery of the third locking member 46 is provided with a sixth locking tooth 462. When the third locking member 46 moves such that the sixth locking tooth 462 engages with both the fourth locking tooth 121 and the fifth locking tooth 321 simultaneously, the third locking member 46 prevents the relative pivoting of the pivot base 10 and the mounting base 32. At this time, the third locking member 46 moves to the stop position. When the third locking member 46 moves such that the sixth locking tooth 462 engages only with the fifth locking tooth 321, the third locking member 46 no longer restricts the relative pivoting of the pivot base 10 and the mounting base 32. At this time, the third locking member 46 moves to the pivot position. As can be seen from the above, the third locking member 46 is relatively fixed to the mounting base 32 in the direction around the second pivot axis L2.

[0111] A release part 463 is provided on the side of the third locking member 46 facing the mounting base 32. In a direction parallel to the second pivot axis L2, the mounting base 32 is provided with a release hole 322 at a position aligned with the release part 463. When the third locking member 46 moves to the pivot position, the release part 463 protrudes through the release hole 322 from the side of the mounting base 32 facing the latching seat 91, and the release button 92 of the latching seat 91 is pressed to release the retraction joint 94 of the frame 9.

[0112] Please refer to the above. Figure 26 and Figure 29 In one embodiment, an eighth elastic member 47 is further provided between the third locking member 46 and the mounting base 32. One end of the eighth elastic member 47 abuts against the inner side of the mounting base 32, and the other end of the eighth elastic member 47 abuts against the side of the third locking member 46 facing the mounting base 32. The eighth elastic member 47 continuously applies an elastic force to the third locking member 46, so that the third locking member 46 has a tendency to move towards the second rotating part 12.

[0113] Optionally, a seat plate 60 is fixedly connected to the mounting side 312 of the fourth pivoting part 31. A connector 63 is provided between the seat plate 60 and the second frame 14. The pivoting of the second frame 14 pulls the seat plate 60 via the connector 63, thereby driving the seat plate 60 to pivot. Optionally, the connector 63 is a seat fabric disposed between the seat plate 60 and the second frame 14. When the second frame 14 pivots relative to the first frame 13, the second frame 14 drives the seat fabric to pull the seat plate 60, causing the seat plate 60 to pivot around the second pivoting axis L2. Optionally, a limiting groove 61 is provided on the portion where the fourth pivoting part 31 and the seat plate 60 are connected to each other. A limiting pin 62 passes through the limiting groove 61 and is fixedly connected to the second rotating part 12. When the locking part 422 disengages from the fourth locking hole 424, the contact between the limiting pin 62 and the end of the limiting groove 61 limits the maximum angle of pivoting of the seat plate 60 relative to the second rotating part 12. When the limiting pin 62 contacts the end of the limiting groove 61, the continued pivoting of the second frame 14 toward the first frame 13 pulls the seat plate 60 and the second rotating part 12 simultaneously via the connector 63, so that the seat plate 60 and the pivot seat 10 pivot together around the second pivot axis L2. Optionally, a handle 64 is provided on the bottom side of the seat plate 60. The user can pivot the seat plate 60 relative to the second rotating part 12 by pulling the handle 64. When the limiting pin 62 abuts against the end of the limiting through groove 61, the user can pull the handle 64 to make the seat plate 60 and the pivot seat 10 pivot together around the second pivot axis L2. In the folded state, the handle 64 can also be used to transport a trolley.

[0114] The following will describe in detail, with reference to the accompanying drawings, the mode switching of the trolley according to an embodiment of the present application, the linkage between the trolley and the frame for folding and unfolding, and the process of assembling and disassembling the trolley on the frame.

[0115] refer to Figure 1 The carrier 1 is installed onto the frame 9 by engaging the mounting base 32 of the carrier 1 with the snap-fit ​​seat 91 on the retractable joint 94 of the frame 9. At this time, the snap-fit ​​part 323 engages with the snap-fit ​​hole 93, and the carrier 1 is fixedly connected to the frame 9. Figure 1 The image shows vehicle 1 in seat mode. Those skilled in the art will understand that vehicle 1 can also be in reclining mode or sleeping box mode. For ease of description, it is assumed that vehicle 1 is initially in sleeping box mode.

[0116] Please refer to the above. Figure 9 , Figure 10 , Figure 11 and Figure 15 The user pivots the handle 52 for the first pivot stroke, causing the handle 52 to move from... Figure 11 The initial position shown is pivoted to Figure 15 At the indicated position, the safety push button 56 abuts against the stop 55, preventing the pull handle 52 from pivoting further. During this process, the pivoting of the pull handle 52 causes the traction member 51 to drive the first drive member 24 from the first position to the second position, thereby causing the first pivot joint 20 to move from the locked state to the first unlocked state. At this time, the user can drive the first frame 13 or the second frame 14, causing the first frame 13 and the second frame 14 to pivot together around the first pivot axis L1, so that the vehicle 1 is disengaged from the sleeping box mode. When the first frame 13 and the second frame 14 are pivoted together so that the first locking pin 260 is aligned with the second locking hole 113, under the action of the third elastic member 272, the first drive member 24 pivots back to the first position, causing the first abutting surface 247 to abut against the abutting end 261 of the first locking pin 260, thereby driving the locking end 262 of the first locking pin 260 into the second locking hole 133. At this time, the vehicle 1 enters the seat mode, and the first pivot joint 20 returns to the locked state. The pivoting of the first driving member 24 pulls the traction member 51, causing the traction member 51 to drive the pull handle 52 back. Figure 11 The initial position is shown. By repeating the above operation, the first frame 13 or the second frame 14 can be pivoted as a whole, allowing the vehicle 1 to switch between sleeping box mode, seat mode, and reclining mode.

[0117] Please refer to the above. Figure 9 , Figure 11 and Figure 17 The user moves the safety push button 56 from... Figure 11 The first moving position shown is pushed to Figure 17 The second moving position is shown, and then the pull handle 52 is pivoted for a second pivot stroke, so that the pull handle 52 moves from... Figure 11 The initial position shown is pivoted to Figure 17As shown, pivoting the handle 52 causes the traction member 51 to drive the first drive member 24 into the third position, thereby causing the first pivot joint 20 to enter the second unlocked state. At this time, the user can drive the second frame 14 to pivot in direction T1, causing the first push part 411 to disengage from the push groove 15 and no longer exert force on the locking member 421, thereby causing the second pivot joint 30 to enter the unlocked state, allowing the seat plate 60 to pivot. Continuing to drive the second frame 14 to pivot in direction T1, under the traction of, for example, the seat fabric connector 63, the pivoting of the second frame 14 will cause the seat plate 60 to pivot in direction T1, and the continued pivoting of the seat plate 60 in direction T1 will cause the pivot seat 10 to rotate around the second pivot axis L2.

[0118] During the folding / closing process of the vehicle 1, the pivoting of the seat plate 60 causes the first pushing ramp 451 of the second pushing part 45 to press against the second pushing ramp 461 of the third locking member 46, thereby driving the third locking member 46 to move from the stop position to the pivot position, thus allowing relative pivoting of the pivot seat 10 and the mounting seat 32. Simultaneously, as the third locking member 46 moves to the pivot position, the release part 463 protrudes through the release hole 322 onto the side of the mounting seat 32 facing the latch seat 91, and presses the release button 92 of the latch seat 91, releasing the folding joint 94 of the frame 9. This allows the rider's handrail 95, front foot 96, and rear foot 97 of the frame 9 to pivot relative to each other, achieving the folding / closing of the frame 9. In the embodiments according to this application, the folding joint 94 can use any suitable structure known to those skilled in the art, and this application is not limited thereto.

[0119] Using the above method, the user only needs to operate the handle 52 and drive the second frame 14 to achieve the linkage and folding of the vehicle 1 and the frame 9. During the folding process, the vehicle 1 does not need to be disassembled from the frame 9. The folding process is simple, and the vehicle 1 and frame 9 can be stored together, saving storage space. When the user needs to use the trolley, simply unfold the vehicle 1 first, and then unfold the frame 9 to complete the trolley's unfolding.

[0120] To remove the vehicle 1 from the frame 9, simply operate the quick-release switch 324 on the mounting base 32 to release the engagement between the latching part 323 and the latching hole 93. The disassembly process is simple and convenient. In the embodiments according to this application, the quick-release switch 324 can use any suitable structure known to those skilled in the art, and this application does not limit it in this regard.

[0121] Those skilled in the art will understand that during the aforementioned linkage closing process, it is not necessary to manually keep the pull handle 52 in place continuously. Figure 17The state is shown. Because the first locking pin 260 will not pivot to the position aligned with the first locking hole 111 or the second locking hole 113 during the pivoting of the second frame 14, the second locking member 26 cannot move to the locked position, and the second frame 14 can remain pivotable relative to the first rotating part 11. Therefore, the traction member 51 will not drive the pull handle 52 to the initial position. During this process, the second locking tooth 222 in the second pivoting part 221 is misaligned with the third locking tooth 231 of the first locking member 23, and the first locking member 23 cannot return to the second pivoting part 221. Therefore, the second frame 14 can remain pivotable relative to the first frame 13. Furthermore, after being retracted, the first locking pin 260 will no longer pivot to a position aligned with the first locking hole 111 or the second locking hole 113. The second locking tooth 222 in the second pivoting part 221 is offset from the third locking tooth 231 of the first locking member 23. Thus, the second frame 14 can maintain a pivotable state relative to the first rotating part 11 and the second frame 14 can maintain a pivotable state relative to the first frame 13, so as to facilitate the subsequent deployment of the carrier 1.

[0122] 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.

[0123] 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 vehicle, characterized in that, include: The first pivot joint has a first pivot part and a second pivot part that pivot about a first pivot axis; The second pivot joint has a fourth pivot part and a second rotation part pivotally connected to each other around a second pivot axis, wherein the first pivot axis and the second pivot axis are not collinear; The first linkage release mechanism locks the fourth pivot and the second rotating part when the first pivot and the second pivot are relatively fixed, thereby restricting the rotation of the fourth pivot relative to the second rotating part. When the second pivot rotates relative to the first pivot, the first linkage release mechanism releases the lock on the fourth pivot and the second rotating part, thereby allowing the fourth pivot to rotate relative to the second rotating part, and the rotation of the second pivot drives the rotation of the fourth pivot. and The second linkage release mechanism is moved by the rotation of the fourth pivot.

2. The vehicle according to claim 1, characterized in that, The first linkage release mechanism includes a second driving member and a locking member. The second driving member is movably disposed between the first pivot joint and the second pivot joint, and the locking member is movably disposed in the second pivot joint. The moving direction of the second driving member intersects with the rotation direction of the second pivot joint and the moving direction of the locking member. When the first pivot and the second pivot are relatively fixed, the second pivot abuts against the second driving member, the second driving member abuts against the locking member, and the locking member engages the fourth pivot and the second rotating part to restrict the fourth pivot from rotating relative to the second rotating part. When the second pivot portion rotates relative to the first pivot portion, the second pivot portion and the second drive member are spaced apart, and the locking member disengages from the fourth pivot portion to allow the fourth pivot portion to rotate relative to the second rotating portion.

3. The vehicle according to claim 1, characterized in that, The first pivot joint also includes: The first rotating part is pivotally connected to the second rotating part around the first pivot axis; A first locking member has a locked position and an unlocked position. When the first locking member is in the locked position, the first locking member restricts the relative rotation of the first pivot portion and the second pivot portion. When the first locking member is in the unlocked position, the first locking member allows the relative rotation of the first pivot portion and the second pivot portion. The second locking member has a locked position and an unlocked position. When the second locking member is in the locked position, it restricts relative rotation between the second pivot and the first rotating part. When the second locking member is in the unlocked position, it allows relative rotation between the second pivot and the first rotating part. The first driving component has a first position, a second position, and a third position. When the first driving member is in the first position, the first locking member is in the locked position, and the second locking member is in the locked position; When the first driving member is in the second position, the first locking member is in the locked position, the second locking member is in the unlocked position, and the first pivot and the second pivot are relatively fixed to rotate together relative to the first rotating member; When the first driving member is in the third position, the first locking member is in the unlocked position and the second locking member is in the unlocked position.

4. The vehicle according to claim 3, characterized in that, The first drive member rotates about the first pivot axis, and the first locking member and the second locking member both move in a direction parallel to the first pivot axis. The first locking member and the second locking member are located on both sides of the first drive member in a direction parallel to the first pivot axis. The first locking member moves from the locked position away from the first drive member to the unlocked position, and the second locking member moves from the locked position towards the first drive member to the unlocked position.

5. The vehicle according to claim 3, characterized in that, A limiting part is provided on the side of the first rotating part facing the second locking member. The second locking member is movably connected to the second pivoting part and is fixed relative to the second pivoting part in the direction around the first pivoting axis. When the first driving member is in the second position, the second locking member rotates relative to the first rotating part with the second pivot part. The limiting part is located in the direction in which the second locking member rotates around the first pivot axis, blocking the second locking member from rotating relative to the first rotating part, thereby blocking the relatively fixed second pivot part and the first pivot part from rotating relative to the first rotating part.

6. The vehicle according to claim 3, characterized in that, The first pivoting part rotates relative to the first rotating part between a first limit position and a second limit position; The first pivoting part is provided with a first stop part, and the first rotating part is provided with a second stop part. When the first side of the first stop part abuts against the first side of the second stop part, the first pivoting part is located at the first extreme position. When the second side of the first stop part abuts against the second side of the second stop part, the first pivoting part is located at the second extreme position.

7. The vehicle according to claim 3, characterized in that, Also includes: Release mechanism, the release mechanism comprising: A traction member, one end of which is connected to the first driving member; and A pull handle, the pull handle having: A first pivot stroke, wherein when the pull handle pivots for the first pivot stroke, the pull handle drives the first drive member to move from the first position to the second position via the traction member; and The second pivot stroke is greater than the first pivot stroke when the handle pivots for the second pivot stroke.

8. The vehicle according to claim 7, characterized in that, The vehicle also includes a stop. The unlocking mechanism further includes a safety push button that moves relative to the pull handle between a first moving position and a second moving position. When the safety push button is in the first moving position, when the pull handle pivots for the first pivot stroke, the safety push button abuts against the stop portion to prevent the pull handle from continuing to pivot; When the safety push button is in the second moving position, the safety push button will not abut against the stop when the handle pivots for the first pivot stroke, so as to allow the handle to continue pivoting until the second pivot stroke is completed.

9. The vehicle according to claim 1, characterized in that, Also includes: The second frame is connected to the second pivot part; Seat plate, connected to the fourth pivot part; and The connector connects the second frame and the base plate. When the second pivot part rotates relative to the first pivot part, the second frame body drives the seat plate to rotate through the connector.

10. A trolley, characterized in that, include: The vehicle according to any one of claims 1 to 9; and Frame, The vehicle is detachably mounted on the frame, and the second linkage release mechanism moves to act on the frame, thereby allowing the frame to be retracted.

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