Pedal assembly and wheelchair

Abstract

A pedal assembly (10), comprising: a connecting frame (100), fixedly connected to a wheelchair body; a foot pedal (200), rotatably connected to the connecting frame (100); a limiting member (300), comprising a fixed portion (310) and a movable portion (320), the fixed portion (310) being fixedly connected to the connecting frame (100), and the movable portion (320) being movable relative to the fixed portion (310); and a transmission mechanism (400), connected to the foot pedal (200) and capable of being driven by the foot pedal (200), wherein the transmission mechanism (400) can drive the movable portion (320) to move and is in limiting connection with the limiting member (300) so as to limit the foot pedal (200). A wheelchair (30) is further provided.

Description

Pedal assembly and wheelchair Technical Field

[0001] This application relates to the field of wheelchair technology, and more particularly to a pedal assembly and a wheelchair. Background Technology

[0002] Wheelchairs are essential tools for assisting people with mobility impairments, and the design of the footrests is crucial for user comfort and safety. When a user is seated in the wheelchair, the footrests can be extended to provide support for their feet. When the user gets out of the wheelchair, the footrests can be retracted for easy movement and storage. However, in related technologies, the stability of the footrests when extended often depends excessively on whether the user is firmly seated in the wheelchair. If the user moves or adjusts their posture even slightly, the footrests may retract unexpectedly, which not only inconveniences the user but also poses a safety hazard. Summary of the Invention

[0003] This application provides a pedal assembly and a wheelchair that can improve the convenience and safety of the wheelchair.

[0004] In a first aspect, embodiments of this application provide a pedal assembly, including:

[0005] Connecting bracket, used for secure connection to the wheelchair body;

[0006] A foot pedal, rotatably connected to the connecting frame;

[0007] The limiting component includes a fixed part and a movable part, wherein the fixed part is fixedly connected to the connecting frame, and the movable part is movable relative to the fixed part;

[0008] A transmission mechanism is connected to the foot pedal and can be driven by the foot pedal. The transmission mechanism can drive the movable part to move and is limited by the limiting member to limit the foot pedal.

[0009] Optionally, the limiting member further includes a limiting elastic member, and the movable part is elastically connected to the fixed part through the limiting elastic member; the movable part is disposed in the movement path of the transmission mechanism; when the transmission mechanism moves in the first direction, the transmission mechanism can drive the movable part to move so that the movable part avoids the transmission mechanism and causes the limiting elastic member to elastically deform; after the transmission mechanism separates from the movable part, the limiting elastic member can drive the movable part to reset so as to limit the transmission mechanism to move in the second direction, which is opposite to the first direction.

[0010] Optionally, the fixed part includes a driving part, which is capable of driving the movable part to move relative to the fixed part.

[0011] Optionally, the driving part includes an electromagnet and a sleeve rod, the movable part is sleeved with the sleeve rod, and the electromagnet can drive the movable part to move along the sleeve rod toward or away from the electromagnet.

[0012] Optionally, the transmission mechanism includes: a first rod, one end of which is rotatably connected to the foot pedal; a second rod, one end of which is rotatably connected to the other end of the first rod, and the other end of the second rod is rotatably connected to the connecting frame; wherein the foot pedal can drive the first rod and the second rod to move, so that the second rod drives the movable part to move relative to the fixed part.

[0013] Optionally, the second rod portion has a guide surface that can abut against the movable portion and push the movable portion toward the fixed portion.

[0014] Optionally, the second rod portion has a limiting surface disposed opposite to the guide surface; when the second rod portion is located on the first side of the movable portion, the guide surface is disposed opposite to the movable portion; when the second rod portion is located on the second side of the movable portion, the limiting surface is disposed opposite to the movable portion, the limiting surface can abut against the movable portion and restrict the second rod portion from moving to the first side, the first side and the second side are located on opposite sides of the movable portion.

[0015] Optionally, the guide surface is an inclined surface and is inclined along the movement direction of the second rod.

[0016] Optionally, the pedal assembly further includes a reset elastic element, which is elastically connected between the foot pedal and the connecting frame. The reset elastic element can drive the foot pedal to switch from an open state to a retracted state. When the foot pedal is in the retracted state, the reset elastic element elastically deforms to keep the foot pedal in the retracted state.

[0017] Optionally, one end of the foot pedal has a notch; the connecting frame includes a horizontal frame and two vertical frames that are fixedly connected. The horizontal frame is used to be fixedly connected to the wheelchair body, and the two vertical frames are spaced apart in the notch. One end of each vertical frame is connected to the horizontal frame, and the other end of each vertical frame is rotatably connected to the foot pedal.

[0018] Optionally, the foot pedal includes a plate body and a rotating shaft and a support plate connected to the plate body. One end of the plate body is provided with the notch, and the rotating shaft and the support plate are spaced apart in the notch. The rotating shaft passes through the two vertical frames, and the first rod is rotatably connected to the support plate.

[0019] Optionally, the crossbeam and the support plate are disposed on opposite sides of the rotating shaft, the first rod and the second rod are disposed between the support plate and the crossbeam, and the limiting member is disposed on the side of the crossbeam facing the support plate.

[0020] Optionally, the transmission mechanism further includes a connecting rod shaft, which is connected to the vertical frame and disposed between the horizontal frame and the support plate. The other end of the second rod is rotatably connected to the vertical frame through the connecting rod shaft.

[0021] When the foot pedal is in the retracted state, one end of the second rod rotates to the side of the connecting rod shaft away from the cross frame.

[0022] When the foot pedal is in the open state, one end of the second rod rotates until the connecting rod shaft faces the crossbeam.

[0023] Optionally, the connecting frame further includes a limiting rod disposed on the vertical frame. The limiting rod is disposed on the movement path of the first rod portion. When the foot pedal moves from the open state to the retracted state, the limiting rod restricts the rotation range of the first rod portion.

[0024] Optionally, when the foot pedal is in the open state, the vertical frame abuts against the support plate.

[0025] Optionally, the pedal assembly further includes a friction element disposed between the vertical frame and the foot pedal. When the foot pedal rotates relative to the connecting frame, the friction element contacts and rubs against the vertical frame or the foot pedal.

[0026] Secondly, embodiments of this application provide a wheelchair, including:

[0027] Wheelchair body;

[0028] The connecting frame is fixedly connected to the wheelchair body;

[0029] A foot pedal, rotatably connected to the connecting frame;

[0030] The limiting component includes a fixed part and a movable part, wherein the fixed part is fixedly connected to the connecting frame, and the movable part is movable relative to the fixed part;

[0031] A transmission mechanism is connected to the foot pedal and can be driven by the foot pedal. The transmission mechanism can drive the movable part to move and is limited by the limiting member to limit the foot pedal.

[0032] Optionally, the fixed part includes a driving part, which is capable of driving the movable part to move relative to the fixed part.

[0033] Optionally, the wheelchair may further include a detection element for controlling the movement of the movable part relative to the fixed part after detecting that the user has left the wheelchair.

[0034] Optionally, the wheelchair also includes a trigger for controlling the movement of the movable part relative to the fixed part based on a user's triggering operation.

[0035] In the embodiments provided in this application, when a user sits in the wheelchair and applies force to the foot pedal, the foot pedal rotates around the connecting frame to open. During this process, the foot pedal drives the transmission mechanism, which in turn drives the movable part of the limiting member to move, enabling the transmission mechanism and the limiting member to form a limiting connection. The limiting action is automatically completed through the rotation of the foot pedal, requiring no additional manual or electric operation from the user, thus improving ease of use. Furthermore, the limiting connection formed between the transmission mechanism and the limiting member during the foot pedal's opening process ensures that the foot pedal remains stably open after opening. Even if the user adjusts their posture or the wheelchair moves, the foot pedal will not retract unexpectedly. The stable foot pedal provides better support and balance, thereby improving the safety of wheelchair use and providing users with a more convenient and reassuring user experience. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 is a schematic diagram of the foot pedal in the open state of the pedal assembly provided in the embodiment of this application;

[0038] Figure 2 is a schematic diagram of the first structure of the pedal assembly shown in Figure 1 during the rotation process;

[0039] Figure 3 is a second structural schematic diagram of the pedal assembly shown in Figure 1 during the rotation process of the foot pedal;

[0040] Figure 4 is a schematic diagram of the first structure of the pedal assembly shown in Figure 1 with the pedal in the retracted state.

[0041] Figure 5 is a schematic diagram of the second structure of the pedal assembly shown in Figure 1 with the pedal in the retracted state.

[0042] Figure 6 is a partial enlarged view of part A in the pedal assembly shown in Figure 5;

[0043] Figure 7 is a partial structural diagram of the pedal assembly shown in Figure 1;

[0044] Figure 8 is a structural schematic diagram of the wheelchair provided in an embodiment of this application. Embodiments of the present invention

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0046] Please refer to Figure 1, which is a structural schematic diagram of the pedal assembly provided in this application embodiment with the foot pedal in the open state. This application embodiment provides a pedal assembly 10, including a connecting frame 100, a foot pedal 200, a limiting member 300, and a transmission mechanism 400.

[0047] The connecting frame 100 is used to fix and connect to the wheelchair body. The connecting frame 100 is responsible for firmly installing the pedal assembly 10 on the wheelchair body, ensuring the integrity and stability of the pedal assembly 10 and the wheelchair.

[0048] The footrest 200 is rotatably connected to the connecting frame 100. The footrest 200 can rotate flexibly relative to the connecting frame 100, allowing it to switch between an open and retracted state to meet the user's needs in different scenarios. When sitting in a wheelchair, the footrest 200 can be switched to the open state to provide support for the user's feet. When leaving the wheelchair, the footrest 200 can be switched to the retracted state for easy wheelchair movement and storage. The footrest 200 can be made of lightweight and sturdy materials to ensure its load-bearing capacity and durability, while also meeting the requirements of portability and comfort.

[0049] The limiting member 300 includes a fixed part 310 and a movable part 320. The fixed part 310 is fixedly connected to the connecting frame 100, and the movable part 320 can move relative to the fixed part 310. The transmission mechanism 400 is connected to the foot pedal 200 and can be driven by the foot pedal 200. The transmission mechanism 400 can drive the movable part 320 of the limiting member 300 to move and is limitedly connected to the limiting member 300.

[0050] The transmission mechanism 400 not only transmits the force applied by the user to the footrest 200, but also cooperates with the limiting member 300 to achieve a limiting function. Specifically, when the user sits in the wheelchair and applies force to the footrest 200, the footrest 200 rotates around the connecting frame 100 to open. During this opening process, the footrest 200 drives the transmission mechanism 400 to move, and the transmission mechanism 400 then drives the movable part 320 of the limiting member 300 to move, so that the transmission mechanism 400 and the limiting member 300 can form a limiting connection. Exemplarily, the limiting action is automatically completed by the rotation of the footrest 200, without requiring additional manual or electric operation by the user, thus improving the convenience of use. Moreover, during the rotation and opening of the foot pedal 200, the limiting connection formed between the transmission mechanism 400 and the limiting member 300 ensures that the foot pedal 200 can be stably kept in the open state after it is opened. Even if the user adjusts the posture or the wheelchair moves, the foot pedal 200 will not retract unexpectedly. The stable foot pedal 200 can provide better support and balance, thereby improving the safety of wheelchair use and bringing users a more convenient and reassuring user experience.

[0051] In some embodiments, the limiting member 300 further includes a limiting elastic member (not shown in the figure), and the movable part 320 is elastically connected to the fixed part 310 through the limiting elastic member. The movable part 320 is disposed in the movement path of the transmission mechanism 400. When the transmission mechanism 400 moves in the first direction, the transmission mechanism 400 can drive the movable part 320 to move so that the movable part 320 avoids the transmission mechanism 400 and causes the limiting elastic member to elastically deform. After the transmission mechanism 400 separates from the movable part 320, the limiting elastic member can drive the movable part 320 to reset so as to limit the transmission mechanism 400 to move in the second direction, which is opposite to the first direction.

[0052] When a user places their foot on the foot pedal 200 and applies force, the foot pedal 200 rotates around the connecting frame 100 to open. The rotation of the foot pedal 200 drives the transmission mechanism 400. During this movement, the transmission mechanism 400 pushes the movable part 320 relative to the fixed part 310 to avoid the movable part 320. When the movable part 320 is pushed by the transmission mechanism 400, the limiting elastic element undergoes elastic deformation, storing energy. Once the transmission mechanism 400 passes the movable part 320 and continues to move, the restoring force of the limiting elastic element ensures that the movable part 320 quickly and stably returns to its initial position. The avoidance action of the movable part 320 is driven by the movement of the transmission mechanism 400, while the reset action of the movable part 320 is automatically achieved by the restoring force of the limiting elastic element. After the movable part 320 resets, it will again be located in the movement path of the transmission mechanism 400. This position allows the movable part 320 to restrict the transmission mechanism 400 from moving in the opposite direction, thus forming a stable limiting connection. Since the avoidance and reset actions of the moving part 320 are automatically achieved by the movement of the transmission mechanism 400 and the restoring force of the limiting elastic element, the user does not need to perform any additional manual or electric operation, which improves the ease of use.

[0053] In some embodiments, the fixed part 310 includes a drive part 311, which can drive the movable part 320 to move relative to the fixed part 310. When the user sits on the wheelchair and applies force to the footrest 200, the footrest 200 rotates and unfolds. During this process, the footrest 200 drives the movable part 320 of the limiting member 300 to move through the transmission mechanism 400, thereby achieving a limiting connection between the transmission mechanism 400 and the limiting member 300. When the user leaves the wheelchair and needs to fold up the footrest 200, since the drive part 311 can provide the necessary power, it can also drive the movable part 320 to move again, thereby releasing the limiting connection between the limiting member 300 and the transmission mechanism 400, thus allowing the footrest 200 to fold up automatically.

[0054] Therefore, the pedal assembly 10 of this embodiment, through the design of the drive unit 311 in the fixing part 310, can realize the automatic control of the retraction of the foot pedal 200. The user does not need to manually release the limiting connection between the transmission mechanism 400 and the limiting member 300. The user can control the drive unit 311 to retract the foot pedal 200 through simple commands or operations, which improves the intelligence and ease of use of the pedal assembly 10.

[0055] In some embodiments, the drive unit 311 includes an electromagnet 312 and a sleeve 313, and the movable part 320 is sleeved with the sleeve 313. The electromagnet 312 can drive the movable part 320 to move along the sleeve 313 toward or away from the electromagnet 312.

[0056] In some embodiments, the movable part 320 is connected to the drive part 311 or the sleeve 313 via a limiting elastic member. The limiting elastic member is, for example, a spring or an elastic sheet, and is used to provide an elastic connection between the movable part 320 and the drive part 311 or the sleeve 313.

[0057] When energized, electromagnet 312 generates a magnetic field that attracts magnetic objects, including the movable part 320. When electromagnet 312 is energized and generates sufficient attraction, the movable part 320 is attracted to move along the sleeve 313 towards electromagnet 312, compressing the limiting elastic element and storing elastic potential energy. When electromagnet 312 is de-energized and the magnetic field disappears, the limiting elastic element releases the stored elastic potential energy, allowing the movable part 320 to move along the sleeve 313 away from electromagnet 312 under the action of the limiting elastic element, returning to its initial position. In this embodiment, the movable part 320 can be quickly and precisely controlled when electromagnet 312 is energized, and when de-energized, the movable part 320 can quickly return to its initial position under the restoring force of the limiting elastic element. The energization and de-energization of electromagnet 312 can be achieved through simple circuit control, making the implementation simple. It should be noted that the design of the drive unit 311 may not be a combination of electromagnet 312 and sleeve rod 313, but may be other designs. This embodiment does not limit this. For example, the drive unit 311 may be a motor, and the extension or retraction of the movable part 320 may be precisely controlled by the motor.

[0058] In some embodiments, the transmission mechanism 400 includes a first rod portion 410 and a second rod portion 420. One end of the first rod portion 410 is rotatably connected to the foot pedal 200; one end of the second rod portion 420 is rotatably connected to the other end of the first rod portion 410, and the other end of the second rod portion 420 is rotatably connected to the connecting frame 100; wherein the foot pedal 200 can drive the first rod portion 410 and the second rod portion 420 to move, so that the second rod portion 420 drives the movable portion 320 to move relative to the fixed portion 310.

[0059] In this embodiment, one end of the first rod 410 is rotatably connected to the foot pedal 200, so the foot pedal 200 rotates, causing the first rod 410 to rotate as well. The other end of the first rod 410 is rotatably connected to one end of the second rod 420, so the rotation of the first rod 410 can drive the second rod 420 to rotate. The other end of the second rod 420 is connected to the connecting frame 100, so the second rod 420 can rotate relative to the connecting frame 100 when it rotates. During the rotation, the second rod 420 can further drive the movable part 320 to move relative to the fixed part 310. For example, in this embodiment, the first rod 410 and the second rod 420 can be connected by a connecting shaft 440, and the end of the connecting shaft 440 near the connecting frame 100 does not abut against the connecting frame 100, so that the second rod 420 can rotate more flexibly and smoothly.

[0060] Please refer to Figures 2 and 3. Figure 2 is a first structural schematic diagram of the pedal assembly shown in Figure 1 during the rotation process, and Figure 3 is a second structural schematic diagram of the pedal assembly shown in Figure 1 during the rotation process. In some embodiments, the second rod portion 420 has a guide surface 421, which can abut against the movable portion 320 and push the movable portion 320 towards the fixed portion 310. During the rotation of the second rod portion 420, the force generated by the rotation of the second rod portion 420 is pushed by the guide surface 421 to move the movable portion 320 towards the fixed portion 310, so that the second rod portion 420 can push the movable portion 320 to move more directly and efficiently.

[0061] In some embodiments, the guide surface 421 is an inclined surface and is inclined along the movement direction of the second rod portion 420. The guide surface 421 is cleverly designed as an inclined surface along the movement direction of the second rod portion 420. When the second rod portion 420 abuts against the movable portion 320 during rotation, the guide surface 421 can more effectively transmit a force toward the fixed portion 310 to the movable portion 320, thereby pushing the movable portion 320 toward the fixed portion 310.

[0062] In some embodiments, the second rod portion 420 has a limiting surface 422 disposed opposite to the guide surface 421; when the second rod portion 420 is located on the first side of the movable portion 320, the guide surface 421 is disposed opposite to the movable portion 320; when the second rod portion 420 is located on the second side of the movable portion 320, the limiting surface 422 is disposed opposite to the movable portion 320, the limiting surface 422 can abut against the movable portion 320 and restrict the second rod portion 420 from moving to the first side, the first side and the second side are located on opposite sides of the movable portion 320.

[0063] The second lever 420 has a guide surface 421 and a limiting surface 422 that are positioned opposite each other. Depending on the position of the second lever 420 relative to the movable part 320, the guide surface 421 and the limiting surface 422 each serve different functions. When the foot pedal 200 is in the retracted state, neither the guide surface 421 nor the limiting surface 422 of the second lever 420 is in contact with the movable part 320. At this time, the foot pedal 200, the first lever 410, the second lever 420, and the movable part 320 are all in a relatively static and compact position for easy storage and carrying. When the user presses down on the foot pedal 200, the foot pedal 200 begins to rotate, causing the first lever 410 to rotate. The first lever 410 then causes the second lever 420 to rotate. When the second lever 420 rotates to the first side of the movable part 320, the guide surface 421 is positioned opposite to the movable part 320. At this time, the second lever 420 can transmit force to the movable part 320 through the guide surface 421, pushing it towards the fixed part 310. As the foot pedal 200 continues to open, the second lever 420 continues to rotate and passes over the movable part 320, reaching the second side of the movable part 320. At this point, the movable part 320 returns to its initial position because there is no longer any pushing force from the second lever 420 towards the fixed part 310. When the second lever 420 reaches the second side of the movable part 320, the limiting surface 422 is positioned opposite to the movable part 320. At this time, if the second lever 420 attempts to move towards the first side, the limiting surface 422 will abut against the movable part 320, thereby restricting the movement of the second lever 420 towards the first side. This creates a limiting connection between the second lever 420 and the movable part 320, ensuring that the foot pedal 200 remains stably open after being opened, and will not retract accidentally even if the user adjusts their posture or the wheelchair moves.

[0064] It should be noted that the limiting connection between the second rod 420 and the movable part 320 can also be achieved in other ways. For example, a groove (not shown in the figure) can be provided on the guide surface 421, which is used to engage the movable part 320. During the opening process of the foot pedal 200, as mentioned above, the guide surface 421 of the second rod 420 abuts against the movable part 320, pushing the movable part 320 toward the fixed part 310. During the pushing process, the second rod 420 also rotates relative to the movable part 320. When the second rod 420 rotates until the movable part 320 smoothly enters the groove, the movable part 320 and the groove can form a locking relationship, restricting the position of the second rod 420 and preventing it from rotating, thus ensuring that the foot pedal 200 can be stably kept in the open state. A blind hole can be provided in the groove to improve the stability of the limiting connection between the second rod 420 and the movable part 320, thereby ensuring the safety of the foot pedal 200 in the open state.

[0065] Please refer to Figures 4, 5, and 6. Figure 4 is a first structural schematic diagram of the pedal assembly shown in Figure 1 with the pedal in the retracted state; Figure 5 is a second structural schematic diagram of the pedal assembly shown in Figure 1 with the pedal in the retracted state; and Figure 6 is a partial enlarged view of part A in the pedal assembly shown in Figure 5. In some embodiments, the pedal assembly 10 further includes a reset elastic element 500, which is elastically connected between the pedal 200 and the connecting frame 100. The reset elastic element 500 can drive the pedal 200 to switch from the open state to the retracted state. When the pedal 200 is in the retracted state, the reset elastic element 500 elastically deforms to keep the pedal 200 in the retracted state.

[0066] The reset elastic element 500 can be, for example, a torsion spring. The torsion spring connects the foot pedal 200 and the connecting frame 100. When the user presses down on the foot pedal 200, it overcomes the resistance of the torsion spring, causing the foot pedal 200 to rotate relative to the connecting frame 100 from a retracted state to an open state. During this process, the torsion spring gradually undergoes elastic deformation and begins to store energy. When the foot pedal 200 is in the open state, the stored energy reaches its maximum value. When the user no longer needs the foot pedal 200 and needs to retract it, the torsion spring releases the stored energy, driving the foot pedal 200 towards the retracted state. Under the action of the torsion spring, the foot pedal 200 gradually rotates and returns to the retracted position. In this embodiment, when the foot pedal 200 is fully retracted, the torsion spring reaches its minimum stored energy value, but still maintains a certain elastic deformation, generating a continuous elastic force in the retracting direction on the foot pedal 200. This allows the foot pedal 200 to remain stably in the retracted state, and even under slight external force or vibration, the foot pedal 200 will not easily open.

[0067] In some embodiments, the foot pedal 200 has a notch 210 at one end; the connecting frame 100 includes a horizontal frame 110 and two vertical frames 120 that are fixedly connected. The horizontal frame 110 is used to be fixedly connected to the wheelchair body, and the two vertical frames 120 are spaced apart in the notch 210. One end of each vertical frame 120 is connected to the horizontal frame 110, and the other end of each vertical frame 120 is rotatably connected to the foot pedal 200.

[0068] The connecting frame 100 consists of a fixedly connected horizontal frame 110 and two vertical frames 120. The horizontal frame 110 serves as a support structure, responsible for fixing the connecting frame 100 to the wheelchair body. The vertical frames 120 are rotatably connected to the footrest 200, allowing the footrest 200 to rotate relative to the vertical frames 120. One end of the footrest 200 has a notch 210, which can accommodate components, such as the two spaced-apart vertical frames 120. This design helps save space, making the entire structure more compact and efficient.

[0069] In some embodiments, the foot pedal 200 includes a plate 220 and a rotating shaft 230 and a support plate 240 connected to the plate 220. One end of the plate 220 is provided with a notch 210, and the rotating shaft 230 and the support plate 240 are spaced apart in the notch 210. The rotating shaft 230 passes through two vertical frames 120, and the first rod portion 410 is rotatably connected to the support plate 240.

[0070] The plate 220 is the main part of the foot pedal 200, which supports the user's feet. A rotating shaft 230 passes through the two vertical supports 120 and is also located in the notch 210. The foot pedal 200 is rotatably connected to the vertical supports 120 via the rotating shaft 230. A support plate 240 is connected to the plate 220 and is also located in the notch 210. A first rod 410 is rotatably connected to the support plate 240, allowing the first rod 410 to be rotatably connected to the foot pedal 200. Therefore, when the foot pedal 200 rotates, it drives the first rod 410 to rotate.

[0071] In some embodiments, the crossbeam 110 and the support plate 240 are disposed on opposite sides of the rotating shaft 230, the first rod portion 410 and the second rod portion 420 are disposed between the support plate 240 and the crossbeam 110, and the limiting member 300 is disposed on the side of the crossbeam 110 facing the support plate 240.

[0072] The crossbeam 110 and the support plate 240 are disposed on opposite sides of the rotating shaft 230. The first rod portion 410 and the second rod portion 420 are disposed between the support plate 240 and the crossbeam 110. The crossbeam 110 serves as a support structure connected to the wheelchair body, providing stable support. The support plate 240 is connected to the plate 220 of the foot pedal 200. The support plate 240 is used to drive the first rod portion 410 to rotate when the foot pedal 200 rotates. The first rod portion 410 then drives the second rod portion 420 to rotate, thereby effectively converting the movement of the foot pedal 200 into the rotation of the first rod portion 410 and the second rod portion 420. The limiting member 300 is disposed on the side of the crossbeam 110 facing the support plate 240, so that when the second rod portion 420 rotates, it can abut against the movable part 320 of the limiting member 300 to push the movable part 320 toward the fixed part 310, so that the second rod portion 420 and the movable part 320 can form a limiting connection. This embodiment achieves stable movement of the foot pedal 200 through a reasonable structural layout, and ensures the balance and stability of the entire structure.

[0073] In some embodiments, a reset elastic element 500, such as a torsion spring, may be disposed between the vertical frame 120 and the support plate 240 so that the foot pedal 200 may generate elastic deformation or release elastic deformation when rotating relative to the vertical frame 120.

[0074] In some embodiments, the transmission mechanism 400 further includes a connecting rod shaft 430, which is connected to the vertical frame 120 and disposed between the horizontal frame 110 and the support plate 240. The other end of the second rod portion 420 is rotatably connected to the vertical frame 120 through the connecting rod shaft 430. When the foot pedal 200 is in the retracted state, one end of the second rod portion 420 rotates to the side of the connecting rod shaft 430 away from the horizontal frame 110. When the foot pedal 200 is in the open state, one end of the second rod portion 420 rotates to the side of the connecting rod shaft 430 facing the horizontal frame 110.

[0075] The connecting rod pivot 430 connects the vertical frame 120 and the second rod 420, allowing the second rod 420 to rotate within a specific range around the connecting rod pivot 430. When the foot pedal 200 changes from a retracted state to an open state, the first rod 410 is subjected to a force from the foot pedal 200 and begins to rotate. This rotation further drives the second rod 420. Through the connection between the connecting rod pivot 430 and the vertical frame 120, the second rod 420 rotates towards the horizontal frame 110, causing the foot pedal 200 to gradually open and provide support for the user. When the foot pedal 200 changes from an open state to a retracted state, the first rod 410 rotates in the opposite direction, causing the second rod 420 to rotate away from the horizontal frame 110 and towards the connecting rod pivot 430, allowing the foot pedal 200 to fold compactly.

[0076] Please continue to refer to Figures 5 and 6. In some embodiments, the connecting frame 100 also includes a limiting rod 130 disposed on the vertical frame 120. The limiting rod 130 is disposed on the movement path of the first rod portion 410. When the foot pedal 200 moves from the open state to the retracted state, the limiting rod 130 restricts the rotation range of the first rod portion 410.

[0077] The limiting rod 130 is set on the movement path of the first rod 410. When the foot pedal 200 moves from the open state to the retracted state, the first rod 410 will rotate as the foot pedal 200 retracts. The limiting rod 130 plays a key role in limiting the rotation range of the first rod 410, thereby preventing the foot pedal 200 from retracting excessively. This allows the foot pedal 200 to remain stably in the retracted state, fitting tightly against other components and reducing the space occupied.

[0078] Please continue to refer to Figure 1. In some embodiments, when the foot pedal 200 is in the open state, the vertical frame 120 abuts against the support plate 240.

[0079] When the foot pedal 200 is in the open position, the vertical bracket 120 abuts against the support plate 240. This abutment limits the opening angle of the foot pedal 200, ensuring that the foot pedal 200 can remain stably at the predetermined opening angle. This interaction between the vertical bracket 120 and the support plate 240 not only provides additional stability but also allows the user to feel a more solid support when using the foot pedal 200. For example, when the movable part 320 and the second rod part 420 form a limiting connection, the second rod part 420 can continue to rotate in the opening direction until the vertical bracket 120 abuts against the support plate 240, at which point the foot pedal 200 is opened to its maximum angle.

[0080] The interaction between the limiting rod 130 of the connecting frame 100, the vertical frame 120, and the support plate 240 jointly ensures the stable opening and closing of the foot pedal 200. The limiting rod 130 prevents the foot pedal 200 from being over-closed by limiting the rotation range of the first rod portion 410, while the abutment between the vertical frame 120 and the support plate 240 prevents the foot pedal 200 from being over-opened. This ensures that the foot pedal 200 can stably stay in the accurate position in both the closed and open states, improving the reliability of the foot pedal 200, preventing damage caused by excessive movement of the foot pedal 200, and providing users with a safer and more comfortable user experience.

[0081] Please refer to Figure 7, which is a partial structural schematic diagram of the pedal assembly shown in Figure 1. In some embodiments, the pedal assembly 10 further includes a friction element 600, which is disposed between the vertical frame 120 and the foot pedal 200. When the foot pedal 200 rotates relative to the connecting frame 100, the friction element 600 contacts and rubs against the vertical frame 120 or the foot pedal 200.

[0082] The friction element 600 is cleverly positioned between the vertical frame 120 and the foot pedal 200, ensuring sufficient contact with both without interfering with the normal operation of other components. When the foot pedal 200 rotates relative to the connecting frame 100, the friction element 600 contacts the vertical frame 120 or the foot pedal 200, generating friction. This friction effectively slows down the rotation speed of the foot pedal 200, making its opening and closing smoother and reducing the impact and discomfort caused by sudden stops or accelerations. Furthermore, the friction element 600 helps stabilize the movement trajectory of the foot pedal 200, preventing wobbling or instability during rotation. The friction element 600 can be made of a material with an appropriate coefficient of friction, good wear resistance, and resistance to deformation, such as plastic.

[0083] Please refer to Figure 8, which is a structural schematic diagram of the wheelchair provided in an embodiment of this application. This application also provides a wheelchair 30, which includes a pedal assembly 10 and a wheelchair body 20 as described in any of the above embodiments. The pedal assembly 10 includes a connecting frame 100, foot pedals 200, a limiting member 300, and a transmission mechanism 400. The connecting frame 100 is fixedly connected to the wheelchair body 20, and the foot pedals 200 are rotatably connected to the connecting frame 100. Users can open or retract the foot pedals 200 as needed. The limiting member 300 includes a fixed portion 310 and a movable portion 320. The fixed portion 310 is fixedly connected to the connecting frame 100, and the movable portion 320 can move relative to the fixed portion 310. The transmission mechanism 400 is connected to the foot pedals 200 and can be driven by the foot pedals 200. The transmission mechanism 400 can drive the movable portion 320 of the limiting member 300 to move and is limitedly connected to the limiting member 300. This limiting connection ensures that the foot pedal 200 can remain stably in the open state after being opened, and the foot pedal 200 will not retract accidentally even if the user adjusts their posture or the wheelchair 30 moves.

[0084] In some embodiments, the limiting member 300 further includes a limiting elastic member, and the movable part 320 is elastically connected to the fixed part 310 through the limiting elastic member. The movable part 320 is disposed in the movement path of the transmission mechanism 400. When the transmission mechanism 400 moves in the first direction, the transmission mechanism 400 can drive the movable part 320 to move so that the movable part 320 avoids the transmission mechanism 400 and causes the limiting elastic member to elastically deform. After the transmission mechanism 400 separates from the movable part 320, the limiting elastic member can drive the movable part 320 to reset so as to limit the transmission mechanism 400 to move in the second direction, which is opposite to the first direction.

[0085] In some embodiments, the fixed part 310 includes a driving part 311, which can drive the movable part 320 to move relative to the fixed part 310.

[0086] In some embodiments, the drive unit 311 includes an electromagnet 312 and a sleeve 313, and the movable part 320 is sleeved with the sleeve 313. The electromagnet 312 can drive the movable part 320 to move along the sleeve 313 toward or away from the electromagnet 312.

[0087] In some embodiments, the wheelchair 30 further includes a detection element for detecting that the active part 320 moves relative to the fixed part 310 after the user leaves the wheelchair 30.

[0088] For example, the detection element can be a sensor, such as an infrared sensor or a pressure sensor, which can be used to detect whether the user is on the wheelchair 30. When the sensor detects that the user has left the wheelchair 30, it can respond quickly and control the movable part 320 to move relative to the fixed part 310 again, thereby releasing the limiting connection between the limiting member 300 and the transmission mechanism 400, thus allowing the footrest 200 to automatically retract, providing convenience for the storage and movement of the wheelchair 30. By adding a detection element, the wheelchair 30 allows the user to retract the footrest 200 without manual operation, improving the intelligence level of the wheelchair 30.

[0089] In some embodiments, the wheelchair 30 further includes a trigger for controlling the movement of the active part 320 relative to the fixed part 310 according to a user's triggering operation.

[0090] By designing a trigger, users can directly control the movement of the movable part 320 as needed, such as retraction, movement, rotation, or other forms of displacement, to release the limiting connection between the limiting member 300 and the transmission mechanism 400. Once the limiting relationship is released, the footrest 200 can be freely retracted to meet the user's needs. The trigger can be a button, switch, handle, or touchscreen, and can be installed in an easily accessible location on the wheelchair 30, such as the armrest, seat side, or control panel, to ensure convenient operation by the user. The trigger design provides users with an intuitive and easy-to-operate control method. Users can easily retract the footrest 200 by simply operating the trigger, such as pressing a button, improving the convenience and flexibility of the wheelchair 30 and enhancing the user's operating experience.

[0091] In some embodiments, the transmission mechanism 400 includes: a first rod portion 410, one end of which is rotatably connected to the foot pedal 200; and a second rod portion 420, one end of which is rotatably connected to the other end of the first rod portion 410, and the other end of the second rod portion 420 is rotatably connected to the connecting frame 100; wherein the foot pedal 200 can drive the first rod portion 410 and the second rod portion 420 to move, so that the second rod portion 420 drives the movable portion 320 to move relative to the fixed portion 310.

[0092] In some embodiments, the second rod portion 420 has a guide surface 421, which can abut against the movable portion 320 and push the movable portion 320 toward the fixed portion 310.

[0093] In some embodiments, the second rod portion 420 has a limiting surface 422 disposed opposite to the guide surface 421; when the second rod portion 420 is located on the first side of the movable portion 320, the guide surface 421 is disposed opposite to the movable portion 320; when the second rod portion 420 is located on the second side of the movable portion 320, the limiting surface 422 is disposed opposite to the movable portion 320, the limiting surface 422 can abut against the movable portion 320 and restrict the second rod portion 420 from moving to the first side, the first side and the second side are located on opposite sides of the movable portion 320.

[0094] In some embodiments, the guide surface 421 is an inclined surface and is inclined along the movement direction of the second rod portion 420.

[0095] In some embodiments, the pedal assembly 10 further includes a reset elastic element 500, which is elastically connected between the foot pedal 200 and the connecting frame 100. The reset elastic element 500 can drive the foot pedal 200 to switch from an open state to a retracted state. When the foot pedal 200 is in the retracted state, the reset elastic element 500 elastically deforms to keep the foot pedal 200 in the retracted state.

[0096] In some embodiments, the foot pedal 200 has a notch 210 at one end; the connecting frame 100 includes a horizontal frame 110 and two vertical frames 120 that are fixedly connected. The horizontal frame 110 is used to be fixedly connected to the wheelchair body 20, and the two vertical frames 120 are spaced apart in the notch 210. One end of each vertical frame 120 is connected to the horizontal frame 110, and the other end of each vertical frame 120 is rotatably connected to the foot pedal 200.

[0097] In some embodiments, the foot pedal 200 includes a plate 220 and a rotating shaft 230 and a support plate 240 connected to the plate 220. One end of the plate 220 is provided with a notch 210, and the rotating shaft 230 and the support plate 240 are spaced apart in the notch 210. The rotating shaft 230 passes through two vertical frames 120, and the first rod portion 410 is rotatably connected to the support plate 240.

[0098] In some embodiments, the crossbeam 110 and the support plate 240 are disposed on opposite sides of the rotating shaft 230, the first rod portion 410 and the second rod portion 420 are disposed between the support plate 240 and the crossbeam 110, and the limiting member 300 is disposed on the side of the crossbeam 110 facing the support plate 240.

[0099] In some embodiments, the transmission mechanism 400 further includes a connecting rod shaft 430, which is connected to the vertical frame 120 and disposed between the horizontal frame 110 and the support plate 240. The other end of the second rod portion 420 is rotatably connected to the vertical frame 120 through the connecting rod shaft 430. When the foot pedal 200 is in the retracted state, one end of the second rod portion 420 rotates to the side of the connecting rod shaft 430 away from the horizontal frame 110. When the foot pedal 200 is in the open state, one end of the second rod portion 420 rotates to the side of the connecting rod shaft 430 facing the horizontal frame 110.

[0100] In some embodiments, the connecting frame 100 further includes a limiting rod 130 disposed on the vertical frame 120. The limiting rod 130 is disposed on the movement path of the first rod portion 410. When the foot pedal 200 moves from the open state to the retracted state, the limiting rod 130 restricts the rotation range of the first rod portion 410.

[0101] In some embodiments, when the foot pedal 200 is in the open state, the vertical bracket 120 abuts against the support plate 240.

[0102] In some embodiments, the pedal assembly 10 further includes a friction element 600 disposed between the vertical frame 120 and the foot pedal 200. When the foot pedal 200 rotates relative to the connecting frame 100, the friction element 600 contacts and rubs against the vertical frame 120 or the foot pedal 200.

[0103] During the opening and closing of the footrest 200 of the wheelchair 30, the various components of the footrest assembly 10 work together to ensure that the footrest 200 can smoothly and reliably transition from the closed state to the open state, and from the open state back to the closed state. The following is an exemplary description of how the various components work together during this process.

[0104] When the foot pedal 200 is in the retracted state, the reset elastic element 500, such as a torsion spring, is in an elastic deformation state, providing a spring force to the foot pedal 200 in the retracting direction. Meanwhile, the first rod portion 410 of the transmission mechanism 400 abuts against the limiting rod 130 on the connecting frame 100, preventing the foot pedal 200 from being over-retracted, thus ensuring the foot pedal 200 remains stably in the retracted state. At this time, the foot pedal 200, connecting frame 100, transmission mechanism 400, limiting element 300, and other components are all in a relatively static and compact position, facilitating storage and carrying.

[0105] The user sits on wheelchair 30 and applies force to footrest 200, overcoming the resistance of the torsion spring. Footrest 200 rotates relative to connecting frame 100 around pivot 230, thus changing from a retracted state to an open state. During the opening process, the torsion spring connecting footrest 200 and connecting frame 100 gradually undergoes elastic deformation, storing energy. The foot pedal 200 drives the first rod 410 of the transmission mechanism 400 to rotate. The rotation of the first rod 410 drives the second rod 420 to rotate around the rotating shaft 230. When the second rod 420 rotates to the first side of the movable part 320, the guide surface 421 of the second rod 420 is set opposite to the movable part 320. The second rod 420 can transmit force to the movable part 320 through the guide surface 421, pushing the movable part 320 to move along the sleeve rod 313 toward the electromagnet 312 to avoid the second rod 420. At this time, the elastic property connecting the movable part 320 and the electromagnet 312 begins to store energy. As the second rod 420 continues to rotate, the second rod 420 can reach the second side of the movable part 320 through the movable part 320. At this time, since the movable part 320 no longer has the pushing force from the second rod 420 toward the electromagnet 312, the limiting elastic member releases energy, and the movable part 320 returns to the initial position under the action of the limiting elastic member. When the second rod 420 reaches the second side of the movable part 320, the limiting surface 422 of the second rod 420 is positioned opposite to the movable part 320. At this time, if the second rod 420 attempts to move to the first side, the limiting surface 422 will abut against the movable part 320, thereby restricting the movement of the second rod 420 towards the first side, so that the second rod 420 and the movable part 320 form a limiting connection. Once the limiting connection is formed, the foot pedal 200 remains stably in the open state, and even if the user adjusts their posture or the wheelchair 30 moves, the foot pedal 200 will not retract unexpectedly. When the foot pedal 200 is in the open state, the upright frame 120 will also abut against the support plate 240, limiting the opening angle of the foot pedal 200. The foot pedal 200 can stably remain at the predetermined opening angle, and the user can feel more stable support when using the foot pedal 200.

[0106] When the user needs to retract the foot pedal 200, the electromagnet 312 is energized by operating the trigger, such as pressing a button, to generate a magnetic field. This attracts the movable part 320 to move along the sleeve rod 313 toward the electromagnet 312. The limiting elastic element stores energy again. Due to the retraction of the movable part 320, the limiting surface 422 of the second rod 420 no longer abuts against the movable part 320, releasing the limiting connection between the second rod 420 and the movable part 320. Once the limiting relationship is released, the torsion spring releases the stored energy, driving the foot pedal 200 to move in the retracting direction. During the retraction process, the first rod 410 rotates in the opposite direction, driving the second rod 420 back to the first side and continuing to rotate until the first rod 410 rotates to abut against the limiting rod 130, so that the foot pedal 200 can be stably in the retracted state and can be folded up compactly. Furthermore, once the second rod 420 and the movable part 320 are no longer restricted, the electromagnet 312 can be de-energized, the magnetic field disappears, and the electromagnet 312 no longer attracts the movable part 320. Then, the limiting elastic element can release energy and push the movable part 320 along the sleeve rod 313 in a direction away from the electromagnet 312, returning to the initial position.

[0107] Therefore, in this embodiment, the wheelchair 30 can be controlled with a single button to quickly and smoothly return the footrest 200 to its retracted state. This ensures that the footrest 200 remains retracted before the user sits on the wheelchair 30, allowing the user to approach the wheelchair 30 without obstacles and sit down smoothly. After the user sits down, the footrest 200 can be unfolded with a simple stepping motion, requiring no additional operation. Moreover, the footrest 200 remains stably in the unfolded state, and will not retract accidentally even if the user adjusts their posture or the wheelchair 30 moves. In this application, by rationally arranging the connecting frame 100, footrest 200, transmission mechanism 400, limiting member 300, reset elastic member 500, friction member 600, trigger member, and other components, and by cleverly connecting and cooperating with each component, not only is the stability, safety, and convenience of the footrest 200 during unfolding and retracting ensured, but the structure of the wheelchair 30 is also simple and compact, reducing manufacturing costs.

[0108] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed description of the pedal assembly 10 above, which will not be repeated here.

[0109] The pedal assembly 10 and wheelchair 30 provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A pedal assembly, wherein, include: Connecting bracket, used for secure connection to the wheelchair body; A foot pedal, rotatably connected to the connecting frame; The limiting component includes a fixed part and a movable part, wherein the fixed part is fixedly connected to the connecting frame, and the movable part is movable relative to the fixed part; A transmission mechanism is connected to the foot pedal and can be driven by the foot pedal. The transmission mechanism can drive the movable part to move and is limited by the limiting member to limit the foot pedal.

2. The pedal assembly according to claim 1, wherein, The limiting member further includes a limiting elastic member, and the movable part is elastically connected to the fixed part through the limiting elastic member; The movable part is disposed in the movement path of the transmission mechanism. When the transmission mechanism moves in the first direction, the transmission mechanism can drive the movable part to move so that the movable part avoids the transmission mechanism and causes the limiting elastic member to elastically deform. After the transmission mechanism is separated from the movable part, the limiting elastic member can drive the movable part to reset so as to limit the transmission mechanism to move in a second direction, which is opposite to the first direction.

3. The pedal assembly according to claim 2, wherein, The fixed part includes a driving part, which is capable of driving the movable part to move relative to the fixed part.

4. The pedal assembly according to claim 3, wherein, The driving unit includes an electromagnet and a sleeve rod. The movable part is sleeved with the sleeve rod, and the electromagnet can drive the movable part to move along the sleeve rod toward or away from the electromagnet.

5. The pedal assembly according to claim 4, wherein, The transmission mechanism includes: The first lever has one end rotatably connected to the foot pedal; The second rod has one end rotatably connected to the other end of the first rod, and the other end of the second rod is rotatably connected to the connecting frame; The foot pedal can drive the first rod and the second rod to move, so that the second rod drives the movable part to move relative to the fixed part.

6. The pedal assembly according to claim 5, wherein, The second rod has a guide surface that can abut against the movable part and push the movable part toward the fixed part.

7. The pedal assembly according to claim 6, wherein, The second rod portion has a limiting surface disposed opposite to the guide surface; When the second rod is located on the first side of the movable part, the guide surface is disposed opposite to the movable part; When the second rod is located on the second side of the movable part, the limiting surface is disposed opposite to the movable part, the limiting surface can abut against the movable part, and restrict the second rod from moving to the first side, the first side and the second side are located on opposite sides of the movable part.

8. The pedal assembly according to claim 6, wherein, The guide surface is an inclined surface and is inclined along the movement direction of the second rod.

9. The pedal assembly according to claim 5, wherein, The pedal assembly also includes a reset elastic element, which is elastically connected between the foot pedal and the connecting frame. The reset elastic element can drive the foot pedal to switch from an open state to a retracted state. When the foot pedal is in the retracted state, the reset elastic element elastically deforms to keep the foot pedal in the retracted state.

10. The pedal assembly according to claim 9, wherein, One end of the foot pedal has a notch; The connecting frame includes a horizontal frame and two vertical frames that are fixedly connected. The horizontal frame is used to fix the wheelchair body, and the two vertical frames are spaced apart in the notch. One end of each vertical frame is connected to the horizontal frame, and the other end of each vertical frame is rotatably connected to the foot pedal.

11. The pedal assembly of claim 10, wherein, The foot pedal includes a plate body, a rotating shaft and a support plate connected to the plate body, one end of the plate body is provided with the notch, and the rotating shaft and the support plate are spaced apart in the notch; The rotating shaft passes through the two vertical frames, and the first rod is rotatably connected to the support plate.

12. The pedal assembly according to claim 11, wherein, The crossbeam and the support plate are disposed on opposite sides of the rotating shaft, the first rod and the second rod are disposed between the support plate and the crossbeam, and the limiting member is disposed on the side of the crossbeam facing the support plate.

13. The pedal assembly according to claim 12, wherein, The transmission mechanism further includes a connecting rod shaft, which is connected to the vertical frame and disposed between the horizontal frame and the support portion. The other end of the second rod portion is rotatably connected to the vertical frame through the connecting rod shaft. When the foot pedal is in the retracted state, one end of the second rod rotates to the side of the connecting rod shaft away from the cross frame. When the foot pedal is in the open state, one end of the second rod rotates until the connecting rod shaft faces the crossbeam.

14. The pedal assembly of claim 13, wherein, The connecting frame also includes a limiting rod disposed on the vertical frame. The limiting rod is disposed on the movement path of the first rod. When the foot pedal moves from the open state to the retracted state, the limiting rod restricts the rotation range of the first rod.

15. The pedal assembly according to claim 11, wherein, When the foot pedal is in the open position, the vertical frame abuts against the support plate.

16. The pedal assembly of claim 11, wherein, The pedal assembly also includes a friction element disposed between the vertical frame and the foot pedal. When the foot pedal rotates relative to the connecting frame, the friction element contacts and rubs against the vertical frame or the foot pedal.

17. A wheelchair, wherein, include: Wheelchair body; The connecting frame is fixedly connected to the wheelchair body; A foot pedal, rotatably connected to the connecting frame; The limiting component includes a fixed part and a movable part, wherein the fixed part is fixedly connected to the connecting frame, and the movable part is movable relative to the fixed part; A transmission mechanism is connected to the foot pedal and can be driven by the foot pedal. The transmission mechanism can drive the movable part to move and is limited by the limiting member to limit the foot pedal.

18. The wheelchair according to claim 17, wherein, The fixed part includes a driving part, which is capable of driving the movable part to move relative to the fixed part.

19. The wheelchair according to claim 18, wherein, The wheelchair also includes a detection element, which is used to control the movement of the movable part relative to the fixed part after detecting that the user has left the wheelchair.

20. The wheelchair according to claim 18, wherein, The wheelchair also includes a trigger, which is used to control the movement of the movable part relative to the fixed part according to the user's trigger operation.

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