Vehicle and method of use thereof

Abstract

The invention provides a vehicle and a using method thereof, relates to the technical field of vehicles, and aims to solve the technical problems that after a current scooter is folded, a lifting and folding mechanism of the scooter is located between a chassis and a seat cushion, so that the folded scooter is large in thickness and inconvenient to carry. The vehicle comprises a chassis and a first connecting rod mechanism. The first connecting rod mechanism comprises a seat bracket, a seat supporting frame and a support; the seat support comprises a first seat connecting rod and a second seat connecting rod, and one end of the first seat connecting rod and one end of the second seat connecting rod are rotationally connected with the seat supporting frame. In the first direction, the support is arranged on the side of the chassis, and the support is rotationally connected with one end of the first seat connecting rod and one end of the second seat connecting rod; when the first connecting rod mechanism is completely folded, the seat support is located on the side of the chassis. According to the vehicle and the using method thereof, after the vehicle is folded, the connecting rod mechanism is located on the side of the chassis, the thickness of the folded vehicle can be reduced, and therefore the folding size of the scooter is reduced, and carrying is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle technology, and more particularly, to a vehicle and a method of using the same. BACKGROUND

[0002] The scooter belongs to low-speed electric vehicles, and is a new type of transportation tool in recent years. It is favored by consumers due to its convenient operation and low safety risk. The current scooter includes a chassis, a lifting and folding mechanism, and a seat cushion. The bottom end of the lifting and folding mechanism is connected to the chassis, and the top end of the lifting and folding mechanism is connected to the seat cushion. Lifting or pressing the seat cushion can expand or fold the lifting and folding mechanism. However, the thickness of the above-mentioned scooter after folding is large, which is not convenient for carrying. SUMMARY

[0003] The purpose of the present application is to provide a vehicle and a method of using the same. The connecting rod mechanism after folding is located on the side of the chassis, which can reduce the thickness after folding, thereby reducing the folding size of the scooter and facilitating carrying.

[0004] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0005] The first aspect of the embodiments of the present application provides a vehicle including a chassis and a first connecting rod mechanism. The first connecting rod mechanism includes a seat support, a seat support frame, and a support. The seat support includes a first seat connecting rod and a second seat connecting rod. One end of the first seat connecting rod and one end of the second seat connecting rod are respectively rotatably connected to the seat support frame. In a first direction, the support is arranged on the side of the chassis, and the support is rotatably connected to one end of the first seat connecting rod and one end of the second seat connecting rod. When the first connecting rod mechanism is completely folded, the seat support is located on the side of the chassis.

[0006] In a possible implementation manner, when the first connecting rod mechanism is completely folded, one end of the seat support away from the support is inclined in a second direction and located below the chassis.

[0007] In a possible implementation manner, the vehicle further includes a backrest support and a transmission connecting rod. The backrest support is rotatably connected to the seat support frame and forms a first rotation point. The transmission connecting rod is arranged between the backrest support and the seat support. One end of the transmission connecting rod is rotatably connected to the backrest support and forms a second rotation point. The other end of the transmission connecting rod is rotatably connected to the seat support and forms a third rotation point. The backrest support, the transmission connecting rod, the seat support, and the seat support frame form a second connecting rod mechanism.

[0008] In a possible implementation, the seat support is configured to mount a seat cushion; when the second linkage mechanism is fully unfolded, the first rotation point is located above the seat cushion along the third direction; when the second linkage mechanism or the first linkage mechanism is fully folded, the seat cushion is located above the base and close to the upper surface of the base; and / or the seat cushion is attached to the upper surface of the base.

[0009] In a possible implementation, the back support is provided with a back cushion; when the second linkage mechanism is fully folded, the back cushion is located above the base, and the back side of the back cushion is close to the upper surface of the base; and / or the back side of the back cushion is attached to the upper surface of the base; along the second direction, the back cushion is arranged opposite to the seat cushion and in the same plane.

[0010] In a possible implementation, the first rotation point and the second rotation point have a first connecting line therebetween, and the second rotation point and the third rotation point have a second connecting line therebetween; the first rotation point, the second rotation point and the third rotation point are configured such that, when the second linkage mechanism is fully unfolded, the included angle between the first connecting line and the second connecting line ranges from 0° to 10°.

[0011] In a possible implementation, the base includes a first base frame and a second base frame; along the second direction, the first base frame is slidingly mounted to one side of the second base frame and located in the same plane.

[0012] In a possible implementation, the vehicle further includes a controller and a first actuator, the first actuator being arranged between the first base frame and the second base frame; the first actuator is in signal connection with the controller, and the controller controls the first actuator to act, so as to make the first base frame slide relative to the second base frame along the second direction.

[0013] In a possible implementation, the first base frame is connected with the seat support in linkage and can move relative to the second base frame along the second direction.

[0014] In a possible implementation, the seat support is configured to drive the first base frame to slide relative to the first base frame along the second direction when the first linkage mechanism or the second linkage mechanism acts.

[0015] In a possible implementation, the vehicle further includes a first rod; along the second direction, the first seat linkage is arranged at the front side of the second seat linkage and parallel thereto; the first end of the first rod is connected with the first base frame, and the second end of the first rod is rotationally connected with the first seat linkage or the second seat linkage.

[0016] In a possible implementation, one end of the second seat connecting rod away from the seat support frame has a bending part; in the second direction, the bending part is arranged at the rear side of the support and is rotationally connected to the first rod member by bypassing the support.

[0017] In a possible implementation, a first locking assembly is arranged between the first chassis frame and the second chassis frame; the first locking assembly is configured to release the locking state of the first chassis frame and the second chassis frame when the chassis is contracted; and the first locking assembly is configured to lock the first chassis frame and the second chassis frame when the chassis is unfolded to the position.

[0018] In a possible implementation, the first locking assembly includes a first locking pin and a first elastic member; the first locking pin is inserted between the first rod member, the first chassis frame and the second chassis frame in the first direction; the first elastic member is configured to provide the first locking pin with an elastic force in the first direction; the first rod member is provided with an adjusting hole, a rod body of the first locking pin is arranged in the adjusting hole, and a length direction of the adjusting hole extends in the second direction; an end of the first locking pin is provided with a first inclined surface, and the first rod member is provided with a second inclined surface matched with the first inclined surface; when the first rod member moves in the second direction, the first inclined surface and the second inclined surface abut and form a wedge structure, so that the first locking pin moves in the first direction against the elastic force of the first elastic member.

[0019] In a possible implementation, the vehicle further includes a controller and a first actuator in signal connection with the controller; the controller is configured to control the first actuator to act when the first connecting rod mechanism or the second connecting rod mechanism acts.

[0020] The controller is configured to control the first actuator to act when the first connecting rod mechanism or the second connecting rod mechanism acts.

[0021] In a possible implementation, the vehicle further includes a position sensor in signal connection with the controller; the position sensor is arranged on the seat support frame or the support to detect the action of the first connecting rod mechanism or the second connecting rod mechanism.

[0022] In a possible implementation, the vehicle further includes a second actuator; the second actuator acts on the first connecting rod mechanism or the second connecting rod mechanism to fold or unfold the vehicle; the second actuator is in signal connection with the controller, and the controller controls the first actuator to act when the second actuator acts.

[0023] In a possible implementation, the backrest support rotates clockwise relative to the seat support to fold the second linkage mechanism; the seat support is provided with a first limiting surface on a side close to the backrest support, and the backrest support is provided with a first limiting block matched with the first limiting surface; when the second linkage mechanism is fully unfolded, the first limiting block abuts against the first limiting surface.

[0024] In a possible implementation, the seat support is provided with a second limiting surface on a side close to the seat support; the second limiting surface is matched with the first seat linkage or the second seat linkage; when the second linkage mechanism is fully folded, the second limiting surface abuts against the first seat linkage or the second seat linkage.

[0025] In a possible implementation, a second locking assembly is arranged between the backrest support and the seat support; the second locking assembly comprises a second locking pin configured to lock the backward angle of the backrest support.

[0026] In a possible implementation, the vehicle further comprises a rear axle motor; in the second direction, the rear axle motor is arranged on the second chassis frame and close to the support; the backrest cushion is provided with an avoiding groove matched with the rear axle motor on the back side.

[0027] In a possible implementation, the vehicle comprises two first linkage mechanisms; in the first direction, the two first linkage mechanisms are respectively arranged on two sides of the chassis; the backrest support and the first linkage mechanisms are connected through the transmission linkage and form two second linkage mechanisms respectively.

[0028] In a possible implementation, the vehicle is configured as a scooter or a wheelchair.

[0029] The second aspect of the embodiments of the present application provides a use method of the vehicle of the first aspect, the vehicle comprising a chassis, a support, a seat support, a seat support frame, a backrest support and a transmission connecting rod; the seat support comprises a first seat connecting rod and a second seat connecting rod, one end of the first seat connecting rod and the second seat connecting rod is rotatably connected with the seat support frame; in a first direction, the support is arranged on the side of the chassis, and the support is rotatably connected with one end of the first seat connecting rod and the second seat connecting rod; and the seat support, the seat support frame and the support form a first connecting rod mechanism; the backrest support is rotatably connected with the seat support frame, the transmission connecting rod is rotatably connected with the backrest support and the seat support, and the backrest support, the transmission connecting rod, the seat support and the seat support frame form a second connecting rod mechanism; the chassis comprises a first chassis frame and a second chassis frame; in a second direction, the first chassis frame is slidably installed on one side of the second chassis frame, and both are located in the same plane; and the seat support is connected with the first chassis frame;

[0030] The use method comprises:

[0031] When folding, the backrest support is rotated clockwise, the transmission connecting rod and the seat support are counterclockwise relative to the seat support frame, and the end of the seat support away from the seat support frame drives the first chassis frame in the second direction and stores the chassis; and / or

[0032] When unfolding, the backrest support is counterclockwise, the transmission connecting rod and the seat support are clockwise relative to the seat support frame, and the end of the seat support away from the seat support frame drives the first chassis frame in the second direction and unfolds the chassis.

[0033] Compared with the related art, the vehicle and the use method thereof provided by the embodiments of the present application have the following advantages:

[0034] The vehicle provided by the embodiments of the present application sets the support rotatably connected with the seat support on the side of the chassis, that is, in a first direction, the support is arranged on one side of the chassis, and when the vehicle is completely folded, the seat support is located on the outside of the chassis.

[0035] Compared with the scooter in the related art, the lifting and folding mechanism after folding is located between the chassis and the seat cushion, resulting in a large thickness of the folded scooter, which is inconvenient to carry. However, in the embodiments of the present application, the seat support and the support in the connecting rod mechanism are located on one side of the chassis after the scooter is completely folded, which does not occupy the space above the chassis, can reduce the thickness of the folded scooter, and thus reduce the folding size of the scooter and facilitate carrying.

[0036] In addition to the technical problems solved by the embodiments of the present disclosure described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features, other technical problems solved by the vehicle and the use method thereof provided by the embodiments of the present disclosure, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structure schematic diagram of a scooter provided by the embodiments of the present disclosure in an unfolded state is shown in FIG. 1.

[0038] Figure 2 A schematic diagram of the arrangement of the first rotation point, the second rotation point and the third rotation point in the second linkage mechanism in the embodiments of the present disclosure is shown in FIG. 2.

[0039] Figure 3 A structure schematic diagram of a scooter provided by the embodiments of the present disclosure in a folded state is shown in FIG. 3.

[0040] Figure 4 A position schematic diagram of a seat support frame provided by the embodiments of the present disclosure in a fully unfolded state is shown in FIG. 4.

[0041] Figure 5 A position schematic diagram of a seat support frame provided by the embodiments of the present disclosure in a fully folded state is shown in FIG. 5.

[0042] Figure 6 A position and structure schematic diagram of a first locking assembly provided by the embodiments of the present disclosure is shown in FIG. 6.

[0043] Figure 7 A mechanical linkage schematic diagram of a chassis and a second linkage mechanism provided by the embodiments of the present disclosure is shown in FIG. 7. Figure 1

[0044] Figure 8 A mechanical linkage schematic diagram of a chassis and a second linkage mechanism provided by the embodiments of the present disclosure is shown in FIG. 8. Figure 2

[0045] Figure 9 A schematic diagram of the arrangement of a first actuator on a chassis provided by the embodiments of the present disclosure is shown in FIG. 9.

[0046] Figure 10 A linkage schematic diagram of a first actuator, a second linkage mechanism and a first chassis frame provided by the embodiments of the present disclosure is shown in FIG. 10. Figure 1

[0047] A linkage schematic diagram of a first actuator, a second linkage mechanism and a first chassis frame provided by the embodiments of the present disclosure is shown in FIG. 11. Figure 11 Figure 2

[0048] REFERENCE SIGNS: ​​​​

[0049] 10 - seat support frame;

[0050] 11 - seat cushion; 12 - first limiting surface; 13 - second limiting surface; 14 - second locking assembly;

[0051] 20 - seat support frame;

[0052] 21 - first seat connecting rod; 22 - second seat connecting rod; 221 - bending part; 222 - supporting arm;

[0053] 30 - support;

[0054] 40 - chassis;

[0055] 41 - first chassis frame; 42 - second chassis frame; 43 - first actuator; 44 - first locking assembly;

[0056] 50 - back support frame;

[0057] 51 - back cushion; 52 - first limiting block;

[0058] 60 - transmission connecting rod;

[0059] 70 - first rod;

[0060] 80 - traveling mechanism;

[0061] 90 - steering mechanism;

[0062] 100 - scooter;

[0063] 101 - first rotation point; 102 - second rotation point; 103 - third rotation point. DETAILED DESCRIPTION

[0064] In the related art, the scooter has a large thickness after being folded, which is inconvenient to carry. The inventor has found that the reason for this problem is that the current scooter includes a chassis, a lifting and folding mechanism, and a seat cushion. The bottom end of the lifting and folding mechanism is connected to the chassis, and the top end of the lifting and folding mechanism is connected to the seat cushion. Lifting or pressing the seat cushion can achieve unfolding or folding of the lifting and folding mechanism. After being folded, the lifting and folding mechanism is located between the chassis and the seat cushion and occupies the space above the chassis, resulting in a large thickness of the folded scooter.

[0065] To solve the above technical problems, the vehicle and the use method thereof provided in the embodiments of the present application set the support rotatably connected to the seat support frame at the side of the chassis. When the scooter is completely folded, the seat support frame can be located at the side of the chassis.

[0066] In this way, when the scooter is completely folded in the embodiment of the present application, the seat support is located at one side of the chassis, which does not occupy the space above the chassis, so that the thickness of the folded scooter can be reduced, thereby reducing the folding size of the scooter and facilitating carrying.

[0067] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0068] In order to facilitate the description of the embodiments of the present application, the coordinate system in the drawings is described, wherein the X-axis direction represents the first direction, which can be the width direction of the scooter, the Y-axis direction represents the second direction, which can be the front-rear direction of the scooter, and the Z-axis direction represents the third direction, which represents the height direction of the scooter.

[0069] As shown in Figure 1 The vehicle provided by the embodiments of the present application can be a scooter or a wheelchair. For example, the scooter can be a scooter for the elderly, and the wheelchair can be a manually folding wheelchair or an electric folding wheelchair. The embodiments of the present application do not limit this, and the embodiments of the present application take the scooter for the elderly as an example for description.

[0070] The scooter 100 provided by the embodiments of the present application comprises a chassis 40, a walking mechanism 80, a steering mechanism 90 and a support assembly. The walking mechanism 80 is arranged on the chassis 40, and the walking mechanism 80 comprises walking wheels and a driving assembly in driving connection with the walking wheels. The driving assembly comprises but is not limited to a driving motor, which is used to provide power to the walking wheels to make the scooter 100 move forward, backward, etc.

[0071] The steering mechanism 90 comprises a steering device and a steering rod. The steering device is arranged at the front end of the chassis 40, and the steering device can drive the walking wheels to steer. The steering rod is arranged at the front end of the chassis 40 and extends along the third direction. The bottom end of the steering rod is connected with the steering device, and the steering rod can control the action of the steering device to make the walking wheels steer.

[0072] The support assembly is used to support the backrest pad 51 or the seat pad 11, etc. The support assembly comprises at least one first linkage mechanism, which is arranged at one side of the chassis 40 and is rotatably connected with the chassis 40 along the first direction. The rotation plane of the first linkage mechanism is in a first plane, and the first plane is a plane where the second direction and the third direction are located. Along the first direction, the first plane is located outside the chassis 40.

[0073] Specifically, the first linkage mechanism comprises the seat support 20, the seat support frame 10 and the support 30; the seat support 20 is used to mount the seat cushion 11, and in the unfolded state of the scooter 100 (when the scooter 100 is in the use state), the seat support 20 is located at the rear end of the chassis 40 along the second direction, and the seat support 20 is located above the chassis 40 along the third direction, a space is kept between the seat support 20 and the chassis 40 along the third direction, and the seat support 20 is kept a distance from the steering rod along the second direction, so as to facilitate the user to sit and operate the steering rod.

[0074] The seat support 20 is arranged between the chassis 40 and the seat support frame 10, and comprises the first seat linkage 21 and the second seat linkage 22, which are arranged at intervals along the second direction. The first ends of the first seat linkage 21 and the second seat linkage 22 are respectively rotatably connected to the seat support frame 10 and connected to different positions of the seat support frame 10.

[0075] Along the first direction, the support 30 is arranged on one side of the chassis 40, i.e. the support 30 can be arranged on the outer side of the chassis 40. The second ends of the first seat linkage 21 and the second seat linkage 22 are respectively rotatably connected to the support 30 and connected to different positions of the support 30. Therefore, the first seat linkage 21, the second seat linkage 22, the support 30 and the seat support frame 10 form the above-mentioned first linkage mechanism, and the first linkage mechanism can be folded and unfolded. Further, when the first linkage mechanism is completely folded, the seat support 20 is located on the side of the chassis 40 along the first direction.

[0076] In the related art, the scooter is folded, and the lifting and folding mechanism is located between the chassis and the seat cushion, so that the folded scooter has a large thickness and is inconvenient to carry. However, in the scooter 100 in the embodiments of the present application, when the scooter 100 is completely folded, the seat support 20 is located on one side of the chassis 40 along the first direction, which does not occupy the space above the chassis 40, can reduce the thickness of the folded scooter 100, and thus reduce the folding size of the scooter 100 and facilitate carrying.

[0077] On the basis of the above-mentioned embodiments, the length and the hinge position of each "linkage" of the first linkage mechanism are adjusted in the embodiments of the present application, so that when the first linkage mechanism is completely folded, the end of the seat support 20 away from the support 30 is inclined downward along the second direction and located below the chassis 40.

[0078] For example, when the mobility scooter 100 is fully folded, the seat support 20 tilts downwards along the second direction, and along the third direction, the end of the seat support 20 furthest from the seat base is located below the chassis 40. This arrangement creates a "negative angle" between the folded seat support and the chassis; the "negative angle" refers to the angle between the extension direction of the folded seat support and the second direction. This arrangement ensures that the seat support frame 10 is as close as possible to the upper surface of the chassis 40, or that the gap is minimal, thus reducing the thickness of the folded mobility scooter 100.

[0079] The mobility scooter 100 provided in this embodiment of the application also includes a backrest bracket 50 and a transmission link 60. The backrest bracket 50 is used to install the backrest cushion 51 and is arranged on the rear side of the seat support frame 10 along the second direction. The backrest bracket 50 is rotatably connected to the seat support frame 10 and forms a first rotation point 101.

[0080] The transmission link 60 is used to connect the seat bracket 20 and the backrest bracket 50. For example, the transmission link 60 is disposed between the seat bracket 20 and the backrest bracket 50, and the two ends of the transmission link 60 are rotatably connected to the backrest bracket 50 and the seat bracket 20 respectively, forming a second rotation point 102 and a third rotation point 103 respectively.

[0081] For example, the seat bracket 20 includes a first seat link 21 and a second seat link 22. One end of the transmission link 60 is rotatably connected to the backrest bracket 50, forming a second rotation point 102. The other end of the transmission link 60 is selectively rotatably connected to either the first seat link 21 or the second seat link 22 to form a third rotation point 103. Therefore, the backrest bracket 50, the transmission link 60, the seat bracket 20, and the seat support frame 10 form a second linkage mechanism.

[0082] like Figure 2 As shown, further, in the embodiments of this application, the line connecting the first rotation point 101 and the second rotation point 102 is defined as the first line, the line connecting the second rotation point 102 and the third rotation point 103 is defined as the second line, and when the mobility scooter 100 is fully deployed, the angle between the first line and the second line is between 0° and 10°.

[0083] Preferably, in this embodiment of the application, the included angle formed between the first connecting line and the second connecting line is configured to be 0°; that is, when the first rotation point 101, the second rotation point 102 and the third rotation point 103 are fully extended, the three are collinear, in other words, the first rotation point 101, the second rotation point 102 and the third rotation point 103 are on the same straight line.

[0084] In this way, when the scooter is in the unfolded state and further locked by the locking assembly, the second linkage mechanism is in the self-locking state, and the transmission linkage 60 not only has a transmission connection function, but also serves as a force bearing rod to support the seat support frame 10. When the driver drives the scooter, the transmission linkage 60 can share part of the gravity, i.e., part of the gravity acts on the locking pin of the locking assembly, and part of the gravity acts on the transmission linkage 60, so as to reduce the bearing strength of the locking pin.

[0085] In an embodiment, when the second linkage mechanism is fully unfolded, the first rotation point is located above the seat cushion 11 in the third direction, and when the second linkage mechanism or the first linkage mechanism is fully folded, the seat cushion 11 is located above the chassis 40 and close to the upper surface of the chassis 40; or the seat cushion 11 can be attached to the upper surface of the chassis 40, and the present application does not limit this.

[0086] Further, the first rotation point is arranged above the seat cushion 11, which not only ensures that the backrest cushion 51 can be laid flat on the upper surface of the chassis when the backrest cushion 51 is completely folded in the second direction, but also realizes the avoidance of the first rotation point and the seat cushion 11, so as to facilitate the installation of the seat cushion 11 and the installation of the hinge between the backrest support 50 and the seat support frame 10.

[0087] As shown in Figure 3 , in the present application, the backrest support 50 rotates clockwise relative to the seat support frame 10 to fold the second linkage mechanism, i.e., the backrest support 50 rotates in the second direction towards the rear side, and then the second linkage mechanism is folded. When the second linkage mechanism is completely folded, the backrest cushion 51 is located above the chassis 40, and the back side of the backrest cushion 51 is close to the upper surface of the chassis 40, or the back side of the backrest cushion 51 is attached to the upper surface of the chassis 40.

[0088] In the second direction, the backrest cushion 51 is arranged opposite to the seat cushion 11 and located in the same plane, that is, the upper surface of the backrest cushion 51 and the upper surface of the seat cushion are located in the same horizontal plane, or approximately located in the same plane, and the height difference is small. In this way, the backrest cushion 51 and the seat cushion 11 are arranged above the chassis 40 in a flat state, rather than being arranged in a stacked manner in the third direction, which can further reduce the thickness of the scooter 100 after folding.

[0089] As shown in Figure 4 , in the present application, the side of the seat support frame 10 facing the backrest support 50 is provided with a first limiting surface 12, and the first limiting surface 12 is located on the rotation path of the backrest support 50. For example, in the clockwise direction, the edge position of the seat support frame 10 is provided with the first limiting surface 12, the first limiting surface 12 is located on the side of the seat support frame 10 facing the backrest support 50, and the first limiting surface 12 is located on the rotation path of the backrest support 50.

[0090] Correspondingly, a first limiting block 52 is provided on the side of the backrest bracket 50 facing the seat support frame 10, and the first limiting block 52 is configured to cooperate with the first limiting surface 12. For example, the first limiting block 52 may be a protrusion protruding from the backrest bracket 50 along a first direction.

[0091] The first limiting block 52 is configured such that when the second linkage mechanism is deployed, the first limiting block 52 abuts against the first limiting surface 12. When the second linkage mechanism is deployed to the position, that is, when the first limiting block 52 abuts against the first limiting surface 12, the backrest bracket 50 is in the first extreme position, so that the backrest bracket 50 can be locked using the second locking component 14 in the future.

[0092] like Figure 5 As shown, the seat support frame 10 is further provided with a second limiting surface 13 on the side near the seat bracket 20. The second limiting surface 13 is configured to cooperate with the first seat link 21 or the second seat link 22. When the second link mechanism is fully folded, the second limiting surface 13 abuts against the first seat link 21 or the second seat link 22.

[0093] For example, along the second direction, the first seat link 21 is disposed in front of the second seat link 22, and the first seat link 21 and the second seat link 22 can be arranged in parallel. The seat support frame 10 is provided with a second limiting surface 13 near the second seat link 22, and the second limiting surface 13 is located on the side of the seat support frame 10 near the second seat link 22 along the first direction.

[0094] The second limiting surface 13 is configured to cooperate with the second seat link 22. When the second link mechanism is folded, the second limiting surface 13 abuts against the second seat link 22, that is, the seat support frame 10 presses on the second seat link 22, and the second link mechanism is fully folded, with the backrest bracket 50 in the second extreme position. It is understood that the aforementioned second limiting surface 13 may be configured to cooperate with the first seat link 21 as needed, and this embodiment does not limit this.

[0095] like Figure 6 As shown, when the second linkage mechanism is fully extended, it locks the extended state of the mobility scooter to prevent the first or second linkage mechanism from operating, thus allowing the user to ride in the scooter. In this embodiment, a second locking assembly 14 is provided between the backrest support 50 and the seat support 20. The second locking assembly 14 includes a second locking pin and a second elastic member. The second elastic member can be a second spring, and it is configured to provide a locking force to the second locking pin.

[0096] For example, the second locking pin and the second spring are arranged on the seat support frame 10, the locking slot is arranged on the back support frame 50, and after the second connecting rod mechanism is unfolded to the position, the second locking pin can be inserted into the locking slot, and the seat support frame 10 and the back support frame 50 are locked. Further, when the scooter needs to be folded, the elastic force of the second spring is overcome to make the second locking pin disengage from the locking slot, and then the locking state of the back support frame 50 and the seat support frame 20 is released.

[0097] As shown in Figures 7 to 11 , the chassis 40 provided by the embodiment of the present application includes a first chassis frame 41 and a second chassis frame 42. In the second direction, the first chassis frame 41 is arranged at the front side of the second chassis frame 42 and slides along the second chassis frame 42.

[0098] Specifically, the first chassis frame 41 and the second chassis frame 42 are oppositely arranged in the second direction, the first chassis frame 41 is slidingly installed to the second chassis frame 42, and both are located in the same plane. For example, the first chassis frame 41 is sleeved on the second chassis frame 42, wherein the above-mentioned steering rod and the steering device are arranged on the first chassis frame 41, and the support 30 is arranged on the outer side of the second chassis frame 42.

[0099] In this way, when the scooter 100 is folded, the first chassis frame 41 slides towards one side of the second chassis frame 42, which can realize the storage of the first chassis frame 41, so that the volume of the entire folded scooter 100 is smaller, thereby facilitating carrying.

[0100] It should be noted that, referring to Figure 10 and Figure 11 , the scooter further includes a first locking assembly 44, which is arranged between the first chassis frame 41 and the second chassis frame 42. The first locking assembly 44 is configured to release the locking state of the first chassis frame 41 and the second chassis frame 42 when the chassis 40 is contracted (stored), and to lock the first chassis frame 41 and the second chassis frame 42 when the chassis 40 is in an unfolded state, so as to prevent the first chassis frame 41 and the second chassis frame 42 from being contracted in the unfolded state.

[0101] In detail, in an embodiment, the first locking assembly 44 includes a first locking pin, which is inserted between the first chassis frame 41 and the second chassis frame 42 in the first direction. The second chassis frame 42 is provided with a limiting hole, and the end of the first locking pin is inserted into the limiting hole, so as to limit the first chassis frame and the second chassis frame in the second direction, i.e. limit the movement of the first chassis frame relative to the first chassis frame.

[0102] Further, the first locking assembly 44 further comprises a first elastic member, which can be a first spring, for providing elastic force to the first locking pin to keep the first locking pin in the limiting hole. In this way, the locking reliability of the first locking assembly 44 with the first chassis frame and the second chassis frame can be improved. It can be understood that when the first chassis frame and the second chassis frame are unlocked, the elastic force of the first elastic member needs to be overcome to make the first locking pin out of the limiting hole, and further the first chassis frame moves relative to the second chassis frame.

[0103] On the basis of the above-mentioned embodiments, the storage mode of the chassis 40 according to the embodiments of the present application includes, but is not limited to, an independent storage mode and a linkage mode with a linkage mechanism, and the storage mode of the chassis 40 is described in detail as follows.

[0104] In an embodiment, the independent storage mode of the chassis includes a manual storage mode and / or an electric storage mode. The manual storage mode can be understood as manually unlocking the first locking assembly 44 and applying pulling force or pushing force to the first chassis frame to make the first chassis frame move relative to the second chassis frame to complete the storage or unfolding of the chassis.

[0105] As shown in Figure 9 , the electric storage mode includes a controller and a first actuator 43, the first actuator 43 is signal-connected with the controller, the controller can be linked with a button switch, and the controller can control the first actuator 43 to act when the button switch is pressed. The first actuator 43 can be one or a combination of an actuator cylinder, a pneumatic spring or a push rod motor, the first actuator 43 is arranged between the first chassis frame 41 and the second chassis frame 42, the displacement direction of the first actuator 43 is consistent with the second direction, and when the first actuator 43 acts, the first chassis frame 41 can be driven to slide relative to the second chassis frame 42 along the second direction.

[0106] In other embodiments, the linkage mechanism linkage storage mode of the chassis 40 can be understood as that when the first linkage mechanism and / or the second linkage mechanism is folded or unfolded, the chassis 40 can be stored or unfolded. The linkage storage mode includes a first linkage mode: the first linkage mechanism or the second linkage mechanism is mechanically linked with the chassis, that is, the first linkage mechanism or the second linkage mechanism drives the first chassis frame to slide relative to the second chassis frame, as shown in Figure 7 and Figure 8 .

[0107] In addition, a second linkage mode: when the first linkage mechanism or the second linkage mechanism is folded or unfolded, the controller responds and controls the first actuator 43 to act, as shown in Figures 9 to 11 . The embodiments of the present application do not limit this, and this is described in detail as follows.

[0108] In one embodiment, the first linkage or the second linkage is in the first linkage mode with the chassis. Referring to Figure 7 and Figure 8 The first chassis frame 41 is mechanically linked with the first linkage or the second linkage, and when the first linkage or the second linkage is actuated, the first chassis frame 41 slides relative to the second chassis frame 42 in the second direction.

[0109] It can be understood that the first linkage, the second linkage and the first chassis frame 41 are mechanically linked, and in essence, the seat support frame is linked with the first chassis frame, that is, when the first linkage or the second linkage is actuated, the seat support frame is rotated to change the state of the first chassis frame 41.

[0110] For example, when the first linkage is folded, the first chassis frame 41 can be driven to move towards the second chassis frame 42 in the first direction, so that the entire chassis 40 is stowed. When the first linkage is unfolded, the first chassis frame 41 can be driven to move away from the second chassis frame 42 in the first direction, so that the entire chassis 40 is unfolded.

[0111] In detail, the scooter 100 provided by the embodiment of the present application further comprises a first rod 70, a first end of the first rod 70 being connected with the first chassis frame 41, and a second end of the first rod 70 being connected with the first seat linkage 21 or the second seat linkage 22. It should be noted that if the chassis 40 is selected to be linked with the first linkage, the second end of the first rod 70 is linked with the first seat linkage 21. If the chassis 40 is selected to be linked with the second linkage, the second end of the first rod 70 is linked with the second seat linkage 22, the second seat linkage 22 being arranged at the rear side of the first seat linkage 21 in the second direction, and the other end of the second seat linkage 22 being rotatably connected with the transmission linkage 60.

[0112] Hereinafter, the embodiment of the present application will be described by taking the chassis 40 being linked with the second linkage as an example. The second seat linkage 22 has a bending portion 221 at the end away from the seat support frame 10, the bending portion 221 being arranged at the rear side of the support 30 in the second direction and being rotatably connected with the first rod 70 around the support 30.

[0113] The second seat linkage 22 comprises a first end and a second end, wherein the first end of the second seat linkage 22 is rotatably connected with the seat support frame 10, and the part of the second seat linkage 22 close to the first end is rotatably connected with the transmission linkage 60.

[0114] For example, the part of the second seat linkage 22 close to the first end is provided with an arm 222, the arm 222 extending towards the transmission linkage 60, one end of the transmission linkage 60 being rotatably connected with the backrest support 50 and forming a second rotation point, and the other end of the transmission linkage 60 being connected with the arm 222 and forming a third rotation point.

[0115] The second end of the second seat connecting rod 22 is usually rotatably connected with the support 30. In order to connect the first chassis frame 41 with the second connecting rod mechanism, the second end of the second seat connecting rod 22 has an extension section which is an integral part of the second seat connecting rod 22 and is configured as a bent portion 221 which is arranged at the rear side of the support 30.

[0116] The bent portion 221 passes around the support 30 and is rotatably connected with the first rod member 70. In this way, the bent portion 221 not only forms a space for avoiding interference between the chassis 40 and the bent portion 221, but also effectively increases the swing range of the first rod member 70, thereby increasing the sliding displacement of the first chassis frame 41 along the second direction.

[0117] When the second connecting rod mechanism is folded or unfolded, the first chassis frame and the second chassis frame can be automatically unlocked. The first locking pin is inserted between the first rod member, the first chassis frame and the second chassis frame along the first direction, and the first rod member 70 is located at the outer side of the first chassis frame, the first chassis frame is sleeved on the second chassis frame and moves along the second direction relative to the second chassis frame.

[0118] The first rod member is provided with an adjusting hole matched with the first locking pin, the adjusting hole is a waist-shaped hole, and the length direction of the adjusting hole is consistent with the second direction, that is, the length direction of the adjusting hole extends along the second direction. The second chassis frame is provided with a limiting hole matched with the first locking pin, the rod body of the first locking pin is arranged in the adjusting hole, and the end portion of the rod body is inserted into the limiting hole.

[0119] The end portion of the first locking pin located at the outer side of the chassis is provided with a first inclined surface, the first rod member is provided with a second inclined surface matched with the first inclined surface, when the first rod member moves along the second direction, the first inclined surface and the second inclined surface abut and form a wedge-shaped structure, so that the pulling force of the first rod member along the second direction is converted into the pulling force along the first direction through the wedge-shaped structure, the pulling force acts on the first locking pin, so that the first locking pin moves along the first direction against the elastic force of the first elastic member, that is, the first locking pin is pulled out of the limiting hole, so that the first chassis frame and the second chassis frame are unlocked, and further under the pulling force of the first rod member, the first chassis frame moves along the second direction relative to the second chassis frame.

[0120] The second linkage mode of the chassis and the connecting rod mechanism in the embodiment: as shown in Figure 9 When the first connecting rod mechanism or the second connecting rod mechanism is folded or unfolded, the controller responds and controls the first actuator 43 to act. Specifically, in one embodiment, the scooter in the embodiment of the application further comprises a position sensor which is signal-connected with the controller; the position sensor is arranged on the seat support frame or the support to detect the action of the first connecting rod mechanism or the second connecting rod mechanism.

[0121] For example, the position sensor provided by the embodiments of the present application can be arranged on the seat support frame. The position sensor can detect the change of the position of a certain point of the back support frame or the seat support frame, determine whether the first linkage mechanism or the second linkage mechanism is in the folded or unfolded state according to the change, and synchronize the information to the controller. The controller controls the first actuator 43 to act according to the state of the linkage mechanism. It should be noted that the position sensor includes, but is not limited to, an angle sensor.

[0122] Further, in another embodiment, the scooter further comprises a second actuator connected to the controller, and the second actuator acts on the first linkage mechanism or the second linkage mechanism to fold or unfold the scooter. When the second actuator acts, the controller controls the first actuator 43 to act.

[0123] For example, the second actuator is arranged between the chassis and the seat support frame. The second actuator can drive the seat support frame to rotate relative to the back support frame to fold or unfold the scooter. When the second actuator acts (rises or falls), the information can be synchronized to the controller. The controller determines the state of the linkage mechanism according to the information and further controls the second actuator to act. It can be understood that the first actuator 43 and the second actuator are connected to the controller, and when either of them acts, the other one can act to make the scooter fold or unfold quickly.

[0124] On the basis of the above-mentioned embodiments, the contraction and expansion of the chassis can be performed under the action of the first actuator 43. At the same time, the mechanical linkage of the first linkage mechanism or the second linkage mechanism and the chassis also acts on the first chassis frame, which is not limited by the embodiments of the present application. In this way, the first actuator 43 can provide folding force to make the folding and unfolding process more labor-saving, so as to realize the quick folding or unfolding of the scooter.

[0125] Further, the scooter 100 further comprises a rear axle motor for driving the rear walking wheels. In the second direction, the rear axle motor is arranged on the second chassis frame 42 and close to the support 30. The rear axle motor can be arranged in the space formed by the bending part 221 and the chassis 40, that is, the second linkage mechanism avoids the rear axle motor through the bending part 221 to avoid interference of the rear axle motor on the second linkage mechanism.

[0126] In order to make the backrest pad 51 keep the horizontal state as much as possible after the second linkage mechanism is completely folded, the back side of the backrest pad 51 is provided with an avoidance groove matched with the rear axle motor. In this way, when the scooter 100 is completely folded, part of the rear axle motor is located in the avoidance groove, which can reduce the height of the backrest pad 51, and further reduce the thickness of the entire scooter 100 after folding.

[0127] It should be noted that the scooter 100 in the embodiment of the present application includes two first link mechanisms, and the first link mechanisms are arranged on the two sides of the chassis along the first direction. Correspondingly, the two sides of the chassis 40 are respectively provided with a support 30 along the first direction, and two rotating links are arranged on the two sides of the backrest support 50, and each transmission link 60 is connected with the corresponding seat support 20, so that the scooter 100 has two second link mechanisms, and the two second link mechanisms are arranged on the two sides of the chassis 40 along the first direction.

[0128] On the basis of the above embodiment, the scooter 100 includes two first links 70, and the two first links 70 are arranged on the two sides of the chassis 40 along the first direction, and one end of each first link 70 is connected with the first chassis frame 41, and the other end of the first link 70 is connected with the second link mechanism. In this way, the folding or unfolding reliability of the scooter 100 and the structural strength of the scooter 100 can be improved, thereby improving the driving safety.

[0129] Referring to Figure 1 and Figure 2 , a vehicle provided by the embodiment of the present application is provided, and the use method of the vehicle is described:

[0130] When the scooter is folded, the backrest support is rotated clockwise, and when the scooter in the unfolded state is folded and stored, the top of the backrest support or the backrest pad is pressed towards the rear side, so that the backrest support is rotated clockwise relative to the seat support frame about the first rotation point.

[0131] In this state, the transmission link and the seat support are both counterclockwise relative to the seat support frame. For example, the transmission link is rotated towards the front side about the third rotation point, so that the seat support swings towards the front side, i.e. the seat support is counterclockwise relative to the support, so that the end of the seat support connected with the first chassis frame swings towards the rear side, and exerts a pulling force on the first link 70, so that the end of the seat support away from the seat support frame drives the first chassis frame to move along the second direction, and the chassis is stored.

[0132] When the scooter is unfolded, the backrest support is counterclockwise, and the transmission link and the seat support are both clockwise relative to the seat support frame; the end of the seat support away from the seat support frame swings towards the front side to drive the first chassis frame to move along the second direction and unfold the chassis. The process is opposite to the folding process of the scooter, which will not be described here.

[0133] The scooter provided by the embodiment of the present application can drive the chassis to be stored synchronously when the link mechanism is folded and stored, thereby simplifying the storage and unfolding process of the entire scooter and improving the folding and storage efficiency of the entire scooter.

[0134] The embodiments or examples in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between embodiments can be mutually referred to.

[0135] It should be noted that the terms "one embodiment", "an embodiment", "some embodiments", "exemplary embodiment", "some examples" and the like used in the specification mean that the described embodiments can include a particular feature, structure or characteristic, but every embodiment can not necessarily include the particular feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure or characteristic in connection with other embodiments whether explicitly described or not.

[0136] Generally, the terms should be understood at least partially by usage in context. For example, the term "one or more" as used herein, depending at least in part upon context, can be used to describe any feature, structure or characteristic in a singular sense or can be used to describe combinations of features, structures or characteristics in a plural sense. Similarly, terms such as "a" or "the" again, depending at least in part upon context, can be understood in the singular sense or in the plural sense, excluding the singular sense, using the definition in the dictionary by the Merriam-Webster Online.

[0137] It should be readily understood that "on", "above" and "over" in the present disclosure should be interpreted in the broadest possible way so that "on" means not only "directly on" but also "on" with intervening features or layers therebetween, and "above" or "over" means not only "above" or "over" but also "above" or "over" without intervening features or layers therebetween (i.e., directly on).

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle, characterized in that, Including the chassis and the first linkage mechanism; The first linkage mechanism includes a seat bracket, a seat support frame, and a support; wherein the seat bracket includes a first seat link and a second seat link, and one end of the first seat link and the second seat link are respectively rotatably connected to the seat support frame; Along the first direction, the support is disposed on the side of the chassis, and the support is rotatably connected to one end of the first seat link and the second seat link respectively; when the first link mechanism is fully folded, the seat bracket is located on the side of the chassis.

2. The vehicle according to claim 1, characterized in that, When the first linkage mechanism is fully folded, the end of the seat bracket away from the support is tilted in the second direction and located below the chassis.

3. The vehicle according to claim 1, characterized in that, The vehicle also includes a backrest support and a transmission linkage. The backrest bracket is rotatably connected to the seat support frame, forming a first rotation point; The transmission link is disposed between the backrest support and the seat support. One end of the transmission link is rotatably connected to the backrest support and forms a second rotation point; the other end of the transmission link is rotatably connected to the seat support and forms a third rotation point. The backrest bracket, the transmission link, the seat bracket, and the seat support frame form a second linkage mechanism.

4. The vehicle according to claim 3, characterized in that, The seat bracket is used to mount the seat cushion; When the second linkage is fully extended, the first rotation point is located above the seat cushion along the third direction; When the second linkage or the first linkage is fully folded, the seat cushion is located above the chassis and close to the upper surface of the chassis; and / or the seat cushion is in contact with the upper surface of the chassis.

5. The vehicle according to claim 3, characterized in that, The backrest support is equipped with a backrest cushion; When the second linkage mechanism is fully folded, the backrest cushion is located above the chassis, and the back side of the backrest cushion is close to the upper surface of the chassis; And / or the back side of the backrest cushion is in contact with the upper surface of the chassis; Along the second direction, the backrest cushion and the seat cushion are positioned opposite each other and are located in the same plane.

6. The vehicle according to claim 3, characterized in that, A first line connects the first rotation point and the second rotation point, and a second line connects the second rotation point and the third rotation point; The first rotation point, the second rotation point, and the third rotation point are configured such that when the second linkage mechanism is fully extended, the angle between the first connecting line and the second connecting line is in the range of 0° to 10°.

7. The vehicle according to claim 1, characterized in that, The chassis includes a first chassis frame and a second chassis frame; Along the second direction, the first chassis frame is slidably mounted on one side of the second chassis frame, and the two are located in the same plane.

8. The vehicle according to claim 7, characterized in that, The vehicle also includes a controller and a first actuator, the first actuator being disposed between the first chassis frame and the second chassis frame; The first actuator is signal-connected to the controller, and the controller controls the first actuator to move so that the first chassis frame slides relative to the second chassis frame in a second direction.

9. The vehicle according to claim 7 or 8, characterized in that, The first chassis frame is linked to the seat bracket and can move relative to the second chassis frame in a second direction.

10. The vehicle according to claim 9, characterized in that, When the seat bracket is configured to operate via a first linkage mechanism or a second linkage mechanism, the seat bracket causes the first chassis frame to slide relative to the first chassis frame in a second direction.

11. The vehicle according to claim 10, characterized in that, The vehicle also includes a first rod; Along the second direction, the first seat link is disposed in front of the second seat link, and the two are arranged in parallel. The first end of the first rod is connected to the first chassis frame, and the second end of the first rod is rotatably connected to the first seat link or the second seat link.

12. The vehicle according to claim 11, characterized in that, The second seat link has a bent portion at the end away from the seat support frame; Along the second direction, the bent portion is located on the rear side of the support and is rotatably connected to the first rod around the support.

13. The vehicle according to claim 11 or 12, characterized in that, A first locking component is provided between the first chassis frame and the second chassis frame; The first locking component is configured to release the locking state between the first chassis frame and the second chassis frame when the chassis is retracted; And when the chassis is deployed, the first locking component can lock the first chassis frame and the second chassis frame.

14. The vehicle according to claim 13, characterized in that, The first locking component includes a first locking pin and a first elastic element; The first locking pin is inserted between the first rod, the first chassis frame, and the second chassis frame along a first direction; the first elastic member is used to provide elastic force to the first locking pin along the first direction; The first rod is provided with an adjustment hole, and the rod body of the first locking pin passes through the adjustment hole. The length direction of the adjustment hole extends along the second direction. The first locking pin has a first inclined surface at its end, and the first rod has a second inclined surface that cooperates with the first inclined surface. When the first rod moves along the second direction, the first inclined surface and the second inclined surface abut and form a wedge structure, which allows the first locking pin to overcome the elastic force of the first elastic member and move along the first direction.

15. The vehicle according to claim 9, characterized in that, The vehicle also includes a controller and a first actuator connected to it via a signal; When the controller is configured to operate the first linkage mechanism or the second linkage mechanism, the controller controls the first actuator to operate.

16. The vehicle according to claim 15, characterized in that, The vehicle also includes a position sensor, which is signal-connected to the controller. The position sensor is mounted on the seat support frame or the support to detect the movement of the first linkage mechanism or the second linkage mechanism.

17. The vehicle according to claim 15, characterized in that, The vehicle also includes a second actuator; The second actuator acts on the first linkage mechanism or the second linkage mechanism to fold or unfold the vehicle; The second actuator is signal-connected to the controller, and when the second actuator is activated, the controller controls the first actuator to activate.

18. The vehicle according to claim 3, characterized in that, The backrest bracket rotates clockwise relative to the seat support frame to fold the second linkage mechanism; The seat support frame is provided with a first limiting surface on the side facing the backrest bracket, and the backrest bracket is provided with a first limiting block that cooperates with the first limiting surface. When the second linkage mechanism is fully extended, the first limiting block abuts against the first limiting surface.

19. The vehicle according to claim 18, characterized in that, The seat support frame is provided with a second limiting surface on the side near the seat bracket; The second limiting surface is configured to cooperate with the first seat link or the second seat link; when the second link mechanism is fully folded, the second limiting surface abuts against the first seat link or the second seat link.

20. The vehicle according to claim 3, characterized in that, A second locking component is provided between the backrest support and the seat support; The second locking component includes a second locking pin configured to lock the reclining angle of the backrest bracket.

21. The vehicle according to claim 5, characterized in that, The vehicle also includes a rear axle motor; Along the second direction, the rear axle motor is mounted on the second chassis frame and is located close to the support; the backrest pad has a clearance groove on its back side that cooperates with the rear axle motor.

22. The vehicle according to claim 3, characterized in that, The vehicle includes two of the first linkage mechanisms; Along the first direction, the two first linkage mechanisms are respectively disposed on both sides of the chassis; The backrest bracket is connected to the first linkage mechanism via the transmission link, and together they form two second linkage mechanisms.

23. The vehicle according to claim 1, characterized in that, The vehicle is configured as a mobility scooter or wheelchair.

24. A method of using a vehicle having any one of claims 1 to 23, characterized in that, The vehicle includes a chassis, a support, a seat bracket, a seat support frame, a backrest bracket, and a transmission link; The seat bracket includes a first seat link and a second seat link, and one end of the first seat link and the second seat link are respectively rotatably connected to the seat support frame; Along the first direction, the support is disposed on the side of the chassis, and the support is rotatably connected to one end of the first seat link and the second seat link respectively; and the seat bracket, the seat support frame and the support form a first linkage mechanism; The backrest bracket is rotatably connected to the seat support frame, and the transmission link is rotatably connected to the backrest bracket and the seat support frame respectively. The backrest bracket, the transmission link, the seat support frame and the seat support frame form a second linkage mechanism. The chassis includes a first chassis frame and a second chassis frame; along a second direction, the first chassis frame is slidably mounted on one side of the second chassis frame, and the two are located in the same plane; Furthermore, the seat bracket is linked to the first chassis frame; The method of use includes: When folded, rotating the backrest bracket clockwise causes the transmission linkage and the seat bracket to rotate counterclockwise relative to the seat support frame; the end of the seat bracket away from the seat support frame drives the first chassis frame to move in the second direction and retracts the chassis. and / or When unfolded, the backrest bracket is rotated counterclockwise, the transmission link and the seat bracket rotate clockwise relative to the backrest bracket seat support frame, and the end of the seat bracket away from the seat support frame drives the first chassis frame to move in the second direction, thus unfolding the chassis.

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