Wheelchair device

Abstract

A wheelchair device, comprising a seat, a backrest and an adjusting mechanism, the adjusting mechanism comprising a bearing structure, a supporting structure and a coupling structure, the supporting structure comprising a transmission assembly and a supporting plate, the seat being connected with the bearing structure, the bearing structure being provided with a first rotating part and a second rotating part, the supporting plate being rotatably connected with the first rotating part through a rotating shaft, the transmission assembly being installed on the supporting plate, the second rotating part and the transmission assembly being rotatably connected with the coupling structure respectively, the backrest being slidably connected with the front face of the supporting plate, the backrest being drivingly connected with the transmission assembly; when the included angle between the supporting plate and the seat increases, the backrest slides on the supporting plate towards the direction close to the rotating shaft; when the included angle between the supporting plate and the seat decreases, the backrest slides on the supporting plate towards the direction away from the rotating shaft.

Description

Technical Field

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

[0002] Powered wheelchairs are important rehabilitation tools, serving not only as mobility aids for people with limb disabilities but, more importantly, enabling them to engage in physical exercise and participate in social activities. They typically consist of a seat and a backrest, with the backrest usually directly connected to the seat to support the user's back. However, current powered wheelchairs only allow for backrest angle adjustment, not adjustment of the backrest's extension distance relative to the seat. Summary of the Invention

[0003] This application provides a wheelchair device aimed at at least solving the technical problems existing in the prior art.

[0004] This application provides a wheelchair device, including:

[0005] Seats;

[0006] Backrest;

[0007] An adjustment mechanism is provided, comprising a load-bearing structure, a support structure, and a connecting structure. The support structure includes a transmission component and a support plate. The seat is connected to the load-bearing structure. The load-bearing structure has a first rotating part and a second rotating part. The support plate is rotatably connected to the first rotating part via a rotating shaft. The transmission component is mounted on the support plate. The second rotating part and the transmission component are respectively rotatably connected to the connecting structure. The backrest is slidably connected to the front of the support plate. The backrest is drively connected to the transmission component.

[0008] When the angle between the support plate and the seat increases, the backrest slides on the support plate toward the direction of rotation; when the angle between the support plate and the seat decreases, the backrest slides on the support plate away from the direction of rotation.

[0009] In a wheelchair device according to one embodiment of this application, the transmission assembly includes a connecting assembly, a fixing assembly, and a belt assembly. The belt assembly is built into the support plate and is arranged along the sliding direction of the backrest. The connecting structure is connected to the belt assembly through the connecting assembly, and the belt assembly is connected to the backrest through the fixing assembly.

[0010] In a wheelchair device according to one embodiment of this application, the belt assembly includes a first pulley, a second pulley, and a belt. The first pulley and the second pulley are arranged along the sliding direction of the backrest. The belt is tensioned between the first pulley and the second pulley. The adapter and the fixing assembly are respectively fixedly connected to the belt.

[0011] In a wheelchair device according to one embodiment of this application, the adapter assembly includes an adapter and a connecting assembly. A receiving cavity and a groove are formed on the support plate. The groove communicates with the receiving cavity. The belt assembly is installed in the receiving cavity. The connecting assembly is connected to the belt of the belt assembly. The connecting assembly passes at least partially through the groove and is connected to the adapter. The adapter is rotatably connected to the connecting structure.

[0012] In a wheelchair device according to an embodiment of this application, a first slide rail is provided on the support plate, and a first slider is provided on the adapter. The position of the first slider corresponds to the position of the first slide rail, and the adapter is slidably connected to the support plate through the cooperation of the first slider and the first slide rail.

[0013] The support plate is provided with a second slide rail, and the backrest is provided with a second slider. The position of the second slider corresponds to the position of the second slide rail, and the backrest is slidably connected to the support plate through the cooperation of the second slider and the second slide rail.

[0014] In a wheelchair device according to one embodiment of this application, the support structure further includes a cover plate with an opening groove, the cover plate is installed at the opening of the receiving cavity, the fixing component is provided with a fixing part, and the backrest is fixed to the fixing part through the opening groove.

[0015] In a wheelchair device according to one embodiment of this application, the connecting assembly includes a connecting shaft, a first retaining member, and a first mating member. The belt is fixed between the first retaining member and the first mating member. One end of the connecting shaft is connected to the first retaining member and the first mating member, and the other end of the connecting shaft passes through the slide groove and is connected to the adapter.

[0016] In a wheelchair device according to one embodiment of this application, the connecting component includes a first pressure block and a first fastener. A first mounting groove is formed between the first holding member and the first mating member. The first pressure block fixes the belt in the first mounting groove through the first fastener.

[0017] In a wheelchair device according to one embodiment of this application, the fixing component includes a second mating member and a second holding member, the belt is fixed between the second holding member and the second mating member, and the backrest is connected to the second holding member.

[0018] In a wheelchair device according to one embodiment of this application, the fixing component further includes a second pressure block and a second fastener. A second mounting groove is formed between the second holding member and the second mating member. The second pressure block fixes the belt in the second mounting groove by the second fastener.

[0019] The technical solution provided in this application embodiment can include the following beneficial effects: This application designs a wheelchair device, including a seat, a backrest, and an adjustment mechanism. The adjustment mechanism includes a load-bearing structure, a support structure, and a connecting structure. The seat is connected to the load-bearing structure. The load-bearing structure is provided with a first rotating part and a second rotating part. The support plate of the support structure is rotatably connected to the first rotating part through a rotating shaft. The transmission component of the support structure is mounted on the support plate. The second rotating part and the transmission component are respectively rotatably connected to the connecting structure. The backrest is slidably connected to the front of the support plate. The backrest is connected to the transmission component through transmission. When the support plate rotates around the first rotating part, the rotation of the support plate drives the transmission component to operate through the connecting structure and drives the backrest to slide, achieving ergonomic adaptation and allowing the backrest to be extended and adjusted.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a wheelchair device provided in one embodiment of this application;

[0023] Figure 2 yes Figure 1 A schematic diagram of the wheelchair device from another angle;

[0024] Figure 3 yes Figure 1 An exploded view of the wheelchair assembly in the diagram;

[0025] Figure 4 yes Figure 1 An exploded view of the backrest and adjustment mechanism;

[0026] Figure 5 yes Figure 1 A partial structural diagram of the adjustment mechanism in the middle;

[0027] Figure 6 yes Figure 5A partial cross-sectional schematic diagram of the adjustment mechanism in the middle;

[0028] Figure 7 yes Figure 6 A schematic diagram showing the connection between the connecting components and the belt;

[0029] Figure 8 yes Figure 6 An exploded view of the fixing components and belt in the diagram;

[0030] Figure 9 yes Figure 5 An exploded view of the support plate in the middle;

[0031] Figure 10 yes Figure 5 An exploded view of the transmission components in the diagram;

[0032] Figure 11 yes Figure 10 An exploded view of the connecting components in the diagram;

[0033] Figure 12 yes Figure 10 An exploded view of the adapter component;

[0034] Figure 13 yes Figure 10 An exploded view of the fixed components in the diagram;

[0035] Figure 14 yes Figure 3 An exploded diagram of the connection structure in the diagram.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Adjustment mechanism; 101. Transmission assembly; 102. Support plate; 1021. Receiving cavity; 1022. Slide groove; 1023. First slide rail; 1024. Second slide rail; 1025. Rotary bearing; 103. Connecting structure; 1031. First connecting section; 1032. Second connecting section; 1033. Third connecting section; 104. Cover plate; 1041. Opening groove;

[0038] 10. Belt assembly; 10a. First belt assembly; 10b. Second belt assembly; 11. First pulley; 12. Second pulley; 13. Belt; 13a. First belt; 13b. Second belt;

[0039] 20. Adapter assembly; 21. Connecting assembly; 211. First retaining member; 2111. First mounting groove; 212. First mating member; 213. Connecting shaft; 214. First pressure block; 215. First fastener; 216. Connecting bolt; 22. Adapter; 221. Adapter plate; 222. First slider; 223. Adapter shaft; 224. Adapter fastener;

[0040] 30. Fixing component; 31. Second holding member; 311. Fixing part; 32. Second mating member; 321. First sub-matting member; 322. Second sub-matting member; 33. Second pressure block; 331. First sub-pressure block; 332. Second sub-pressure block; 34. Second fastener;

[0041] 200. Backrest; 201. Second slider;

[0042] 300, Seat; 300a, Load-bearing structure; 301, First rotating part; 302, Second rotating part;

[0043] 400. Rotating shaft. Detailed Implementation

[0044] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] It should also be understood that the terminology used in this application specification is merely for describing specific realities within the scope of this application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] like Figures 1 to 3As shown, this application provides a wheelchair device, including an adjustment mechanism 100, a seat 300 for sitting, and a backrest 200 for leaning. The adjustment mechanism 100 is connected to the seat 300 and the backrest 200. When an external force causes the backrest 200 to rotate relative to the seat 300, the rotation of the backrest 200 can be driven to slide by the adjustment mechanism 100, achieving ergonomic adaptation and allowing the backrest 200 to be extended and adjusted.

[0048] In one alternative implementation, such as Figures 3 to 5 As shown, the adjustment mechanism 100 includes a load-bearing structure 300a, a support structure, and a connecting structure 103. The support structure includes a transmission assembly 101 and a support plate 102.

[0049] The seat 300 is connected to the load-bearing structure 300a. The seat 300 and the load-bearing structure 300a can be two independent mechanisms, with the seat 300 mounted on the load-bearing structure 300a; of course, the seat 300 and the load-bearing structure 300a can also be an integral connection structure, which also allows the seat 300 to be connected to the load-bearing structure 300a.

[0050] The support structure 300a has a first rotating part 301 and a second rotating part 302 on both sides. The support plate 102 is rotatably connected to the first rotating part 301 through the rotating shaft 400. The transmission component 101 is installed on the support plate 102. The connecting structure 103 is rotatably connected between the second rotating part 302 and the transmission component 101. The backrest 200 is connected to the transmission component 101. The backrest 200 is slidably connected to the front of the support plate 102, so that the backrest 200 can slide along the support plate 102 towards or away from the rotating shaft 400 by the change of angle between the support plate 102 and the seat 300. That is, the backrest 200 automatically extends and adjusts by the change of the tilt angle between the support plate 102 and the seat 300, thereby achieving ergonomic adaptation.

[0051] For example, when the angle between the support plate 102 and the seat 300 or the load-bearing structure 300a increases, the backrest 200 slides on the support plate 102 toward the direction of rotation axis 400; when the angle between the support plate 102 and the seat 300 decreases, the backrest 200 slides on the support plate 102 away from the rotation axis 400, so that the backrest 200 can be extended and adjusted by the change in the angle between the support plate 102 and the seat 300.

[0052] It should be noted that the load-bearing structure 300a can be directly integrated with the seat 300, reducing connecting parts and improving structural strength. Alternatively, the load-bearing structure 300a can be connected to the seat 300 via assembly. The first rotating part 301 and the second rotating part 302 are symmetrically arranged on both sides of the load-bearing structure 300a, so that the support plate 102, as a rigid load-bearing component, can be hinged to the two first rotating parts 301 via the rotating shaft 400, achieving a rotational connection between the support plate 102 and the seat 300. The transmission component 101 is mounted on the support plate 102, and may include, but is not limited to, being hidden inside the support plate 102 to achieve a compact spatial layout. The connecting structure 103 connects the second rotating part 302 and the transmission component 101, serving as a power transmission intermediary. This allows the rotation of the support plate 102 to drive the transmission component 101 through the connecting structure 103, causing the backrest 200 to slide linearly along the support plate 102, thus converting the rotational motion of the support plate 102 into linear displacement of the backrest 200, improving the adjustability and ease of use of the wheelchair device.

[0053] With the above technical solution, the support plate 102 is hinged to the first rotating part 301, allowing the support plate 102 to rotate around it, thus changing its angle with the supporting structure 300a. The transmission assembly 101 is linked to the second rotating part 302 via the connecting structure 103, converting the change in the angle between the support plate 102 and the supporting structure 300a into the extension movement of the backrest 200. The support plate 102, serving as the mounting base for the backrest 200 and the transmission assembly 101, can be rotated relative to the supporting structure 300a using manual or electric power sources, thereby triggering the backrest 200 to slide along the extension direction, achieving automatic adjustment and ensuring stable support for the user in different postures. Meanwhile, this application mounts the transmission assembly 101 on the support plate 102 or hides most of the structure of the transmission assembly 101 inside the support plate 102, so that when the backrest 200 is adjusted at an angle, most of the structure can be prevented from interfering with the hinge when the support plate 102 rotates, and the problem of the hinge being tangled by clothing or other foreign objects can also be improved.

[0054] In one alternative implementation, such as Figure 3 , Figures 4 to 10As shown, the transmission assembly 101 includes a transition assembly 20, a fixing assembly 30, and a belt assembly 10. The belt assembly 10 is arranged along the sliding direction of the support plate 102 to form a transmission path in the extension direction. The connecting structure 103 is connected to the belt assembly 10 via the transition assembly 20, and the belt assembly 10 is connected to the backrest 200 via the fixing assembly 30 to convert the driving force from the connecting structure 103 into linear motion of the belt assembly 10, thereby driving the backrest 200 to slide along the extension direction of the support plate 102, ensuring the synchronization of the position of the backrest 200 with the angle of the seat 300. The belt assembly 10 avoids slippage and is quieter than gear or chain transmission methods. It not only enables precise control but also ensures low-friction transmission, making it suitable for medical scenarios. Therefore, this application simplifies mechanical linkage into linear motion through the transmission method of the belt assembly 10, balancing transmission reliability and user experience while ensuring stable sliding of the backrest 200 along the extension direction. This is suitable for rehabilitation wheelchairs or high-end nursing equipment that require frequent adjustments to the backrest 200.

[0055] In an alternative embodiment, at least a portion of the structure of the belt assembly 10 is built into the support plate 102 to improve the overall aesthetics, safety, and dustproof performance through a concealed transmission structure. This not only ensures quiet operation by reducing noise generated by the belt assembly 10 during transmission, but also prevents fabric fibers from getting tangled, thus preventing the backrest 200 from being entangled by clothing or other foreign objects during angle adjustment. It also prevents the user's limbs from touching the belt assembly 10, thus meeting medical device safety standards.

[0056] In an optional embodiment, the belt assembly 10 includes a first pulley 11, a second pulley 12, and a belt 13. The belt 13 is connected between the first pulley 11 and the second pulley 12 and is tensioned between the first pulley 11 and the second pulley 12. The first pulley 11 and the second pulley 12 are arranged along the sliding direction of the backrest 200. The adapter assembly 20 and the fixing assembly 30 are respectively fixedly connected to the belt 13 so as to achieve precise height adjustment of the backrest 200 through the combination of the first pulley 11, the second pulley 12, and the belt 13.

[0057] For example, such as Figure 1 , Figure 3 and Figure 6As shown, when the angle between the support plate 102 and the seat 300 increases, the support plate 102 rotates counterclockwise relative to the seat 300 around the first rotating part 301. During the rotation, the connecting structure 103 pushes the adapter component 20 to slide away from the rotating axis 400. The adapter component 20 drives the side of the belt 13 connected to the connecting component 21 to slide away from the rotating axis 400, so that the other side of the belt 13 connected to the fixing component 30 can slide towards the rotating axis 400. This, in turn, drives the backrest 200 connected to the fixing component 30 to slide on the support plate 102 towards the rotating axis 400. Similarly, when the angle between the support plate 102 and the seat 300 decreases, the support plate 102 rotates clockwise relative to the seat 300 around the first rotating part 301. During the rotation of the support plate 102, the connecting structure 103 is pulled to slide towards the direction closer to the rotating axis 400. The adapter component 20 drives the side of the belt 13 connected to the connecting component 21 to slide towards the direction closer to the rotating axis 400, so that the other side of the belt 13 connected to the fixing component 30 can slide away from the rotating axis 400. This, in turn, drives the backrest 200 connected to the fixing component 30 to slide away from the rotating axis 400 on the support plate 102. That is, this application can realize the reversing function of the adapter component 20 and the fixing component 30 through the belt 13, so that the movement directions of the adapter component 20 and the backrest 200 are opposite.

[0058] In an optional embodiment, the belt assembly 10 includes a first belt assembly 10a and a second belt assembly 10b, which are spaced apart along the width of the support plate 102. The first belt assembly 10a is connected to the second belt assembly 10b via a fixing assembly 30 to ensure the consistency of movement between the first belt assembly 10a and the second belt assembly 10b. The first belt assembly 10a and the second belt assembly 10b are connected to an adapter 22 via a connecting assembly 21 to receive angular changes from the support plate 102 through the adapter 20, and then convert the angular changes into linear sliding of the backrest 200 in the extension direction. This improves the stability and load capacity of the backrest 200 adjustment through the first belt assembly 10a and the second belt assembly 10b spaced apart along the width of the support plate 102.

[0059] For example, the first belt assembly 10a and the second belt assembly 10b have the same structure, each including a first pulley 11, a second pulley 12, and a belt 13. The first pulley 11 and the second pulley 12 are spaced apart along the longitudinal direction of the support plate 102 so that when the belt 13 moves vertically, the belt 13 can directly drive the backrest 200 to slide through the fixing assembly 30. The adapter assembly 20 connects the opposite sides of the first belt assembly 10a and the second belt assembly 10b to form a double-point rigid support. It is used to receive angular changes from the support plate 102 and convert these angular changes into movement of the belt 13. This not only disperses the force and avoids single-point stress concentration and unilateral deformation, but also counteracts lateral torque and prevents the backrest 200 from tilting or jamming. The first belt assembly 10a and the second belt assembly 10b are connected together on their adjacent sides by a fixing component 30 connected to the backrest 200, thereby concentrating the separate driving forces of the first belt assembly 10a and the second belt assembly 10b to drive the backrest 200 to move up and down, thereby improving the ability of the belt assembly 10 to drive the load.

[0060] In one alternative implementation, such as Figures 5 to 12 As shown, the adapter assembly 20 includes an adapter 22 and a connecting assembly 21. A receiving cavity 1021 and a slide groove 1022 are formed on the support plate 102, and the slide groove 1022 communicates with the receiving cavity 1021. The belt assembly 10 is installed in the receiving cavity 1021. The connecting assembly 21 is connected to the belt 13 of the belt assembly 10. At least a portion of the connecting assembly 21 passes through the slide groove 1022 and is connected to the adapter 22. The adapter 22 is rotatably connected to the connecting structure 103 to form a compact and stable backrest 200 adjustment transmission system.

[0061] For example, the adapter 22 serves as a power transmission intermediary between the connecting structure 103 and the connecting assembly 21, transmitting the movement of the connecting structure 103 to the connecting assembly 21, enabling the connecting assembly 21 to transmit the power to the belt 13, and then to the backrest 200 via the movement of the belt 13. The belt assembly 10 is installed within the receiving cavity 1021, concealed within the support plate 102, which not only provides dust and water protection, improving aesthetics and safety, and extending the lifespan of the belt 13, but also ensures stable belt operation and prevents deviation. The connecting assembly 21 is slidably installed in the slide groove 1022, enabling power transmission between the inside and outside of the support plate 102. In another embodiment, the slide groove 1022 also serves as a guide, facilitating stable adjustment of the backrest 200.

[0062] In one alternative implementation, such as Figure 3 , Figures 10 to 14As shown, the connecting structure 103 includes a connecting plate arranged in a Z-shape. The connecting plate has a first connecting section 1031, a second connecting section 1032, and a third connecting section 1033. The third connecting section 1033 is connected between the first connecting section 1031 and the second connecting section 1032. The first connecting section 1031 is rotatably connected to the second rotating part 302, and the second connecting section 1032 is rotatably connected to the adapter 22. The three-section lever design efficiently transmits the angle change of the seat 300 to the belt assembly 10, thereby achieving precise adjustment of the backrest 200.

[0063] For example, the first connecting segment 1031 serves as the input arm of the connecting plate, which can be hinged to the second rotating part 302 or rotatably connected to the second rotating part 302 via a bearing, and is used to receive the rotational movement of the support plate 102 relative to the seat 300; the third connecting segment 1033 serves as a transition arm, which can be connected to the first connecting segment 1031 and the second connecting segment 1032 by welding or integral molding, and is used to change the direction of force transmission and amplify / adjust the displacement; the second connecting segment 1032 serves as an output arm, which is hinged to the adapter 22, and is used to transmit the composite movement of the Z-shaped plate to the adapter 22, so as to drive the belt 13 to move up and down through the connecting assembly 21, and efficiently convert the rotational movement of the support plate 102 into the linear adjustment of the backrest 200, so as to achieve multi-directional force transmission in a limited space, avoid interference with other components, and have both structural compactness and mechanical advantages.

[0064] In one alternative implementation, such as Figures 3 to 11 As shown, the support plate 102 is provided with a first slide rail 1023, the adapter 22 is provided with a first slider 222, and the two sides of the receiving cavity 1021 are provided with the first slide rail 1023. The position of the first slider 222 corresponds to the position of the first slide rail 1023, so that the adapter 22 can slide and connect with the support plate 102 through the cooperation of the first slider 222 and the first slide rail 1023, reducing the lateral force on the belt 13, preventing the adapter 22 from getting stuck during the movement, and ensuring the smoothness and reliability of the backrest 200 adjustment process.

[0065] In an optional embodiment, the adapter 22 includes an adapter plate 221, an adapter shaft 223, and an adapter fastener 224. The adapter shaft 223 is connected to both ends of the adapter plate 221. The second connecting section 1032 is rotatably connected to the adapter shaft 223. The connecting assembly 21 is connected to the adapter plate 221 through the adapter fastener 224. The adapter plate 221 is slidably connected to the first slide rail 1023 through the first slider 222, so that the adapter plate 221 can move along the guide direction of the first slide rail 1023.

[0066] In one alternative implementation, such as Figure 4 , Figure 9 and Figure 13As shown, the support structure also includes a cover plate 104 with an opening slot 1041. The cover plate 104 is installed at the opening of the receiving cavity 1021. The fixing assembly 30 is provided with a fixing part 311. The position of the opening slot 1041 corresponds to the position of the fixing part 311, so that the backrest 200 can be fixed to the fixing part 311 through the opening slot 1041. This not only enables the backrest 200 to be quickly installed and stably supported, but also maintains a neat appearance and protects the internal transmission components. The fixing part 311 moves along the extension direction in the opening slot 1041 to ensure the linear movement of the backrest 200.

[0067] In one alternative implementation, such as Figures 6 to 12 As shown, the connecting assembly 21 includes a connecting shaft 213, a first retaining member 211, and a first mating member 212. The belt 13 is fixed between the first retaining member 211 and the first mating member 212. One end of the connecting shaft 213 is connected to the first retaining member 211 and the first mating member 212, and the other end of the connecting shaft 213 passes through the slide groove 1022 and is connected to the adapter 22, thereby realizing the reliability of force transmission between the belt 13 and the adapter 22.

[0068] For example, such as Figure 6 and Figure 7 As shown, the belt assembly 10 is housed in the receiving cavity 1021, and the belt 13 is clamped between the first holding member 211 and the first mating member 212. One end of the connecting shaft 213 is connected to the first holding member 211 and the first mating member 212, and the other end of the connecting shaft 213 passes through the slide groove 1022 and is connected to the adapter 22, so that the adapter 22 can drive the first holding member 211 and the first mating member 212 to slide away from or towards the rotation shaft 400 through the connecting shaft 213, so that the first holding member 211 and the first mating member 212 can drive the belt 13 connected to them to slide away from or towards the rotation shaft 400, thereby driving the belt 13 located on the opposite side of the first holding member 211 and the first mating member 212 to slide in the opposite direction.

[0069] In one alternative implementation, such as Figures 6 to 12 As shown, the connecting component 21 includes a first pressure block 214 and a first fastener 215. A first mounting groove 2111 is formed between the first holding member 211 and the first mating member 212. The first pressure block 214 fixes the belt 13 in the first mounting groove 2111 through the first fastener 215. The mechanical combination of the first pressure block 214 and the first fastener 215 achieves a combination of precision mechanical meshing and controllable pretension force. While ensuring the reliability of transmission, it also ensures the rigid fixation and quick disassembly and assembly of the belt 13, which facilitates the disassembly, assembly and maintenance of the belt 13 and the connecting component 21.

[0070] In an optional embodiment, the connecting assembly 21 includes a connecting bolt 216, a first connecting hole on the first retaining member 211, a second connecting hole on the first mating member 212, and one end of the connecting shaft 213 passes through the first connecting hole and the second connecting hole and is connected to the connecting bolt 216, so that the connecting shaft 213 can be firmly fixed on the first retaining member 211 and the first mating member 212. The other end of the connecting shaft 213 passes through the slide groove 1022 and is connected to the adapter fastener 224 to ensure a reliable connection between the connecting shaft 213 and the adapter plate 221.

[0071] For example, such as Figure 6 and Figure 7 As shown, the connecting bolt 216 passes through the first retaining member 211 and the first mating member 212 and is fixedly connected to the connecting shaft 213, so that the first retaining member 211 and the first mating member 212 can be fixed together to form a first mounting groove 2111 for fixing the belt 13. The first pressure block 214 is installed in the first mounting groove 2111, and then the first pressure block 214 is squeezed by the first fastener 215, so that the belt 13 can be firmly fixed in the first mounting groove 2111.

[0072] In one alternative implementation, such as Figure 3 , Figures 10 to 12 As shown, there are two connecting components 21. One connecting component 21 is connected between the adapter plate 221 and the belt 13 of the first belt assembly 10a, and the other connecting component 21 is connected between the adapter plate 221 and the belt 13 of the second belt assembly 10b. The two ends of the adapter plate 221 are rotatably connected to the second rotating parts 302 on both sides of the bearing structure 300a through connecting plates.

[0073] In one alternative implementation, such as Figure 4 , Figures 6 to 13 As shown, the fixing component 30 includes a second mating member 32 and a second clamping member 31. The belt 13 is fixed between the second clamping member 31 and the second mating member 32. The backrest 200 is connected to the second clamping member 31 so that the second mating member 32 and the second clamping member 31 cooperate to form a clamping structure for fixing the belt 13, thereby achieving a rigid connection between the belt 13 and the backrest 200, ensuring the reliability of force transmission between the backrest 200 and the belt 13, and effectively absorbing impact energy.

[0074] For example, such as Figure 6 and Figure 8As shown, the belt 13 includes a first belt 13a and a second belt 13b. The second mating member 32 is installed on both sides of the second clamping member 31 to achieve a fixed connection between the first belt 13a and the second belt 13b. The backrest 200 is connected to the second clamping member 31, so that the first belt 13a and the second belt 13b can drive the backrest 200 to slide away from or towards the rotating shaft 400 through the second clamping member 31.

[0075] In one alternative implementation, such as Figure 4 , Figures 6 to 13 As shown, the fixing component 30 also includes a second pressure block 33 and a second fastener 34. A second mounting groove is formed between the second holding member 31 and the second mating member 32. The second pressure block 33 fixes the belt 13 in the second mounting groove through the second fastener 34. Through the synergistic effect of the second pressure block 33 and the second fastener 34, a stable rigid connection is formed between the belt 13 and the fixing component 30 to ensure the safety of the backrest 200 when it is under load.

[0076] In an optional embodiment, the second mating member 32 includes a first sub-matting member 321 and a second sub-matting member 322, and the second pressing block 33 includes a first pressing block 331 and a second pressing block 332. A first sub-mounting groove is formed between the first sub-matting member 321 and the second retaining member 31, and a second sub-mounting groove is formed between the second sub-matting member 322 and the second retaining member 31. The first sub-pressing block 331 is installed in the first sub-mounting groove by a second fastener 34 to achieve a fixed connection between the fixing component 30 and the belt 13 of the first belt assembly 10a. The second sub-pressing block 332 is installed in the second sub-mounting groove by a second fastener 34 to achieve a fixed connection between the fixing component 30 and the belt 13 of the second belt assembly 10b.

[0077] For example, such as Figure 6 and Figure 8As shown, the second fastener 34 includes a first sub-fastener 341 and a second sub-fastener 342. The first sub-fitting member 321 is installed on one side of the second holding member 31 via the first sub-fastener 341 to restrict the first belt 13a in the first sub-mounting groove. The second sub-fitting member 322 is installed on the other side of the second holding member 31 to restrict the first belt 13a in the second sub-mounting groove. The first sub-pressing block 331 is accommodated in the first sub-mounting groove so that it can be pressed by the first sub-fastener 341 and the first belt 13a can be firmly fixed in the first sub-mounting groove. The second sub-pressing block 332 is accommodated in the second sub-mounting groove so that it can be pressed by the second sub-fastener 342 and the second belt 13b can be firmly fixed in the second sub-mounting groove. The fixing part 311 is located between the first belt 13a and the second belt 13b so that the backrest 200 can be fixed to the fixing part 311 by bolts or the like, so as to realize the fixed connection between the backrest 200 and the fixing component 30, the first belt 13a and the second belt 13b.

[0078] In one alternative implementation, such as Figures 4 to 10 As shown, the support plate 102 is provided with a second slide rail 1024, and the backrest 200 is provided with a second slider 201. The position of the second slider 201 corresponds to the position of the second slide rail 1024, so that the backrest 200 can slide and connect with the support plate 102 through the cooperation of the second slider 201 and the second slide rail 1024. Through the cooperation of the high rigidity slide rail and the low friction slider, the millimeter-level precise positioning of the backrest 200 lifting and lowering can be achieved.

[0079] In an optional embodiment, a rotary bearing 1025 is provided between the support plate 102 and the rotating shaft 400 to ensure the smooth rotation of the support plate 102 relative to the load-bearing structure 300a.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0081] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A wheelchair device, characterized in that, include: Seats; Backrest; An adjustment mechanism is provided, comprising a load-bearing structure, a support structure, and a connecting structure. The support structure includes a transmission component and a support plate. The seat is connected to the load-bearing structure. The load-bearing structure has a first rotating part and a second rotating part. The support plate is rotatably connected to the first rotating part via a rotating shaft. The transmission component is mounted on the support plate. The second rotating part and the transmission component are respectively rotatably connected to the connecting structure. The backrest is slidably connected to the front of the support plate. The backrest is drively connected to the transmission component. When the angle between the support plate and the seat increases, the backrest slides on the support plate toward the direction of rotation; when the angle between the support plate and the seat decreases, the backrest slides on the support plate away from the direction of rotation. The transmission assembly includes a connecting assembly, a fixing assembly, and a belt assembly. The belt assembly is built into the support plate and is arranged along the sliding direction of the backrest. The connecting structure is connected to the belt assembly through the connecting assembly, and the belt assembly is connected to the backrest through the fixing assembly. The adapter assembly includes an adapter and a connecting assembly. A receiving cavity and a groove are formed on the support plate. The groove communicates with the receiving cavity. The belt assembly is installed in the receiving cavity. The connecting assembly is connected to the belt of the belt assembly. The connecting assembly passes at least partially through the groove and is connected to the adapter. The adapter is rotatably connected to the connecting structure.

2. The wheelchair device according to claim 1, characterized in that, The belt assembly includes a first pulley, a second pulley, and a belt. The first pulley and the second pulley are arranged along the sliding direction of the backrest. The belt is tensioned between the first pulley and the second pulley. The adapter and the fixing assembly are respectively fixedly connected to the belt.

3. The wheelchair device according to claim 1, characterized in that, The support plate is provided with a first slide rail, and the adapter is provided with a first slider. The position of the first slider corresponds to the position of the first slide rail, and the adapter is slidably connected to the support plate through the cooperation of the first slider and the first slide rail. The support plate is provided with a second slide rail, and the backrest is provided with a second slider. The position of the second slider corresponds to the position of the second slide rail, and the backrest is slidably connected to the support plate through the cooperation of the second slider and the second slide rail.

4. The wheelchair device according to claim 1, characterized in that, The support structure also includes a cover plate with an opening groove, the cover plate being installed at the opening of the receiving cavity, the fixing component having a fixing part, and the backrest being fixed to the fixing part through the opening groove.

5. The wheelchair device according to claim 1, characterized in that, The connecting assembly includes a connecting shaft, a first retaining member, and a first mating member. The belt is fixed between the first retaining member and the first mating member. One end of the connecting shaft is connected to the first retaining member and the first mating member, and the other end of the connecting shaft passes through the slide groove and is connected to the adapter.

6. The wheelchair device according to claim 5, characterized in that, The connecting assembly includes a first pressure block and a first fastener. A first mounting groove is formed between the first retaining member and the first mating member. The first pressure block fixes the belt in the first mounting groove through the first fastener.

7. The wheelchair device according to claim 1, characterized in that, The fixing component includes a second mating member and a second holding member, the belt is fixed between the second holding member and the second mating member, and the backrest is connected to the second holding member.

8. The wheelchair device according to claim 7, characterized in that, The fixing component further includes a second pressure block and a second fastener. A second mounting groove is formed between the second holding member and the second mating member. The second pressure block fixes the belt in the second mounting groove by the second fastener.

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