Wheelchair device

Abstract

A wheelchair device comprises a seat, a backrest and an adjusting mechanism, the adjusting mechanism comprises a bearing structure, a supporting structure and a connecting structure, the supporting structure comprises a transmission assembly and a supporting plate, the seat is connected with the bearing structure, the bearing structure is provided with a first rotating part and a second rotating part, and the first rotating part is connected with the supporting plate. The supporting plate is rotationally connected to the first rotating part through a rotating shaft, the transmission assembly is installed on the supporting plate, the second rotating part and the transmission assembly are rotationally connected to the connecting structure, the backrest is slidably connected to the front face of the supporting plate, and the backrest is in transmission connection with the transmission assembly; when the included angle between the supporting plate and the seat is increased, the backrest slides on the supporting plate in the direction close to the rotating shaft; when the included angle between the supporting plate and the seat is reduced, the backrest slides on the supporting plate in the direction away from the rotating shaft.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a wheelchair device. Background Art

[0002] Powered wheelchairs are important rehabilitation tools. They serve not only as a means of transportation for people with physical disabilities but, more importantly, enable them to exercise and participate in social activities. They typically consist of a seat and a backrest, with the backrest typically directly connected to the seat to support the user's back. However, existing power wheelchair backrests can only be adjusted for tilt; the distance they extend relative to the seat is not adjustable. Summary of the Invention

[0003] The present application provides a wheelchair device, which aims to at least solve the technical problems existing in the prior art.

[0004] The present application provides a wheelchair device, comprising: seats; Backrest; An adjustment mechanism, the adjustment mechanism comprising a bearing structure, a support structure and a coupling structure, the support structure comprising a transmission assembly and a support plate, the seat being connected to the bearing structure, the bearing structure being provided with a first rotating portion and a second rotating portion, the support plate being rotatably connected to the first rotating portion via a rotating shaft, the transmission assembly being mounted on the support plate, the second rotating portion and the transmission assembly being rotatably connected to the coupling structure respectively, the backrest being slidably connected to the front face of the support plate, and the backrest being transmission-connected to the transmission assembly; When the angle between the support plate and the seat increases, the backrest slides on the support plate toward the direction approaching the rotation axis; when the angle between the support plate and the seat decreases, the backrest slides on the support plate toward the direction away from the rotation axis.

[0005] In a wheelchair device of one embodiment of the present application, the transmission assembly includes an adapter assembly, a fixing assembly and a belt assembly. The belt assembly is built into the support plate and arranged along the sliding direction of the backrest. The connecting structure is connected to the belt assembly through the adapter assembly, and the belt assembly is connected to the backrest through the fixing assembly.

[0006] In a wheelchair device of one embodiment of the present 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 on the first pulley and the second pulley, and the adapter assembly and the fixing assembly are respectively fixedly connected to the belt.

[0007] In a wheelchair device of one embodiment of the present application, the adapter assembly includes an adapter and a connecting assembly, a receiving cavity and a slide groove are formed on the support plate, the slide groove is connected to 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 is connected to the adapter after at least partially passing through the slide groove, and the adapter is rotatably connected to the connecting structure.

[0008] In a wheelchair device according to an embodiment of the present application, the support plate is provided with a first slide rail, 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 between the first slider and the first slide rail; A second slide rail is provided on the support plate, and a second slider is provided on the backrest. 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.

[0009] In a wheelchair device of one embodiment of the present application, the support structure further includes a cover plate having an open slot, the cover plate is installed at the opening of the accommodating cavity, the fixing assembly is provided with a fixing portion, and the backrest is fixed to the fixing portion through the open slot.

[0010] In a wheelchair device of one embodiment of the present application, the connecting assembly includes a connecting shaft, a first clamping member and a first mating member, the belt is fixed between the first clamping member and the first mating member, one end of the connecting shaft is connected to the first clamping 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.

[0011] In a wheelchair device of one embodiment of the present application, the connecting assembly includes a first pressing block and a first fastener, a first mounting groove is formed between the first clamping member and the first mating member, and the first pressing block fixes the belt in the first mounting groove through the first fastener.

[0012] In the wheelchair device of one embodiment of the present application, the fixing assembly includes a second fitting member and a second clamping member, the belt is fixed between the second clamping member and the second fitting member, and the backrest is connected to the second clamping member.

[0013] In a wheelchair device of one embodiment of the present application, the fixing assembly further includes a second pressing block and a second fastener, a second mounting groove is formed between the second clamping member and the second mating member, and the second pressing block fixes the belt in the second mounting groove through the second fastener.

[0014] The technical solution provided by the embodiments of the present application may include the following beneficial effects: The present application designs a wheelchair device, including a seat, a backrest and an adjustment mechanism, the adjustment mechanism including 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 assembly of the support structure is installed on the support plate, the second rotating part and the transmission assembly are respectively rotatably connected to the connecting structure, the backrest is slidably connected to the front of the support plate, and the backrest is transmission-connected to the transmission assembly, when the support plate rotates around the first rotating part, the rotation of the support plate drives the transmission assembly to operate through the connecting structure, and drives the backrest to slide, realizing ergonomic adaptation, so that the backrest can be extended and adjusted.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a structural diagram of a wheelchair device provided in one embodiment of the present application; Figure 2 yes Figure 1 A schematic structural diagram of the wheelchair device at another angle; Figure 3 yes Figure 1 Exploded diagram of the wheelchair assembly; Figure 4 yes Figure 1 Exploded diagram of the backrest and adjustment mechanism; Figure 5 yes Figure 1 A schematic diagram of a portion of the structure of the regulating mechanism; Figure 6 yes Figure 5 A partial cross-sectional schematic diagram of the regulating mechanism in FIG. Figure 7 yes Figure 6 Schematic diagram of the connection between the connecting component and the belt; Figure 8 yes Figure 6 Exploded diagram of the fixed components and belts; Figure 9 yes Figure 5 An exploded schematic diagram of the support plate in FIG. Figure 10 yes Figure 5 An exploded schematic diagram of the transmission components in FIG. Figure 11 yes Figure 10 Exploded diagram of connected components in ; Figure 12 yes Figure 10 Exploded diagram of the adapter in FIG. Figure 13 yes Figure 10 An exploded diagram of the fixed components in FIG. Figure 14 yes Figure 3 Schematic diagram of the decomposition of the connection structure in .

[0018] Description of reference numerals: 100. Adjustment mechanism; 101. Transmission assembly; 102. Support plate; 1021. Accommodation chamber; 1022. Slideway; 1023. First slide rail; 1024. Second slide rail; 1025. Rotating bearing; 103. Connecting structure; 1031. First connecting section; 1032. Second connecting section; 1033. Third connecting section; 104. Cover plate; 1041. Opening slot; 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; 20. Adapter assembly; 21. Connecting assembly; 211. First retaining member; 2111. First mounting slot; 212. First mating member; 213. Connecting shaft; 214. First pressing block; 215. First fastener; 216. Connecting bolt; 22. Adapter; 221. Adapter plate; 222. First slider; 223. Adapter shaft; 224. Adapter fastener; 30. Fixing assembly; 31. Second clamping member; 311. Fixing portion; 32. Second mating member; 321. First sub-mating member; 322. Second sub-mating member; 33. Second pressing block; 331. First sub-mating block; 332. Second sub-mating block; 34. Second fastener; 200, backrest; 201, second slider; 300, seat; 300a, load-bearing structure; 301, first rotating part; 302, second rotating part; 400. Rotating axis. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] It should also be understood that the terms used in this specification of the present application are only for the purpose of describing specific realities. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0022] like Figures 1 to 3 As shown, the present 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 drive the backrest 200 to slide through the adjustment mechanism 100, achieving ergonomic adaptation, so that the backrest 200 can be extended and adjusted.

[0023] In an optional embodiment, if Figures 3 to 5 As shown, the adjustment mechanism 100 includes a bearing structure 300 a , a supporting structure and a connecting structure 103 , wherein the supporting structure includes a transmission assembly 101 and a supporting plate 102 .

[0024] The seat 300 is connected to the supporting structure 300a. The seat 300 and the supporting structure 300a can be two independent structures, with the seat 300 mounted on the supporting structure 300a. Of course, the seat 300 and the supporting structure 300a can be an integral connection structure, which can also enable the seat 300 to be connected to the supporting structure 300a.

[0025] A first rotating part 301 and a second rotating part 302 are provided on both sides of the supporting structure 300a. The support plate 102 is rotatably connected to the first rotating part 301 through the rotating shaft 400. The transmission assembly 101 is installed on the support plate 102. The connecting structure 103 is rotatably connected between the second rotating part 302 and the transmission assembly 101. The backrest 200 is transmission-connected to the transmission assembly 101. The backrest 200 is slidingly connected to the front side of the support plate 102, so that the backrest 200 can slide along the support plate 102 toward or away from the rotating shaft 400 through the change in the angle between the support plate 102 and the seat 300, that is, the backrest 200 is automatically extended and adjusted through the change in the inclination angle of the support plate 102 and the seat 300, thereby achieving ergonomic adaptation.

[0026] Illustratively, when the angle between the support plate 102 and the seat 300 or the supporting structure 300a increases, the backrest 200 slides on the support plate 102 in a direction closer to the 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 in a direction away from the rotation axis 400, so that the backrest 200 can be extended and adjusted by changing the angle between the support plate 102 and the seat 300.

[0027] It should be noted that the support structure 300a can be directly integrated with the seat 300, reducing the number of connectors and improving structural strength. The support structure 300a can also be connected to the seat 300 through assembly. The first rotating portion 301 and the second rotating portion 302 are symmetrically arranged on either side of the support structure 300a, so that the support plate 102, which serves as a rigid load-bearing member, can be hinged to the two first rotating portions 301 via the rotating shaft 400, thereby achieving a rotational connection between the support plate 102 and the seat 300. The transmission assembly 101 is disposed on the support plate 102 and includes, but is not limited to, being concealed within the support plate 102 to achieve a compact spatial layout. The coupling structure 103 connects the second rotating portion 302 and the transmission assembly 101, acting as a power transmission medium. The rotation of the support plate 102 can drive the transmission assembly 101 through the coupling structure 103, driving the linear sliding of the backrest 200 along the support plate 102, thereby converting the rotational motion of the support plate 102 into linear displacement of the backrest 200, thereby improving the adjustability and ease of use of the wheelchair device.

[0028] With the above technical solution, the support plate 102 is hingedly connected to the first rotating portion 301, allowing the support plate 102 to rotate about the first rotating portion 301, thereby changing the angle between the support plate 102 and the supporting structure 300a. The transmission assembly 101, in conjunction with the second rotating portion 302 via the coupling structure 103, is used to convert the change in the angle between the support plate 102 and the supporting structure 300a into an extension movement of the backrest 200. The support plate 102 serves as the mounting base for the backrest 200 and the transmission assembly 101. It can be powered manually or electrically to rotate the support plate 102 relative to the supporting structure 300a, thereby triggering the backrest 200 to slide in the extension direction, achieving automatic adjustment and ensuring stable support for the user in different postures. At the same time, the present application installs 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 angle of the backrest 200 is adjusted, 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 entangled by clothing or other foreign objects can also be improved.

[0029] In an optional embodiment, if Figure 3 、 Figures 4 to 10 As shown, the transmission assembly 101 includes an adapter 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 coupling structure 103 is connected to the belt assembly 10 through the adapter assembly 20, and the belt assembly 10 is connected to the backrest 200 through the fixing assembly 30 to convert the driving force from the coupling structure 103 into a 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 and the angle of the seat 300. Among them, the belt assembly 10 can avoid slipping and is quieter than the transmission method of gears or chains. It can not only achieve precise control, but also ensure low-friction transmission, which is suitable for medical scenarios. Therefore, the present application simplifies the mechanical linkage into linear motion through the transmission method of the belt assembly 10, taking into account the reliability of the transmission and the user experience, and ensuring the stable sliding of the backrest 200 in the extension direction. It is suitable for rehabilitation wheelchairs or high-end nursing equipment that require frequent adjustment of the backrest 200.

[0030] In an optional embodiment, at least part of the structure of the belt assembly 10 is built into the support plate 102 to enhance the overall aesthetics, safety and dustproof performance through a hidden transmission structure. This can not only take into account silence and reduce the noise generated by the belt assembly 10 during transmission, but also avoid the entanglement of fabric fibers and prevent the backrest 200 from being entangled by clothing or other foreign objects when adjusting the angle. It can also prevent the user's limbs from touching the belt assembly 10, complying with medical equipment safety standards.

[0031] 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, the belt 13 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.

[0032] For example, Figure 1 、 Figure 3 and Figure 6 As shown, when the angle between the support plate 102 and the seat 300 increases, the support plate 102 rotates counterclockwise around the first rotating part 301 relative to the seat 300, and the connecting structure 103 pushes the adapter assembly 20 to slide in the direction away from the rotating axis 400 during the rotation process. The adapter assembly 20 drives the side of the belt 13 connected to the connecting assembly 21 to slide in the direction away from the rotating axis 400, so that the other side of the belt 13 connected to the fixed assembly 30 can slide in the direction close to the rotating axis 400, thereby driving the backrest 200 connected to the fixed assembly 30 to slide on the support plate 102 in the direction close to 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 about the first rotating portion 301. During the rotation of the support plate 102, the connecting structure 103 is pulled to slide in a direction closer to the rotating axis 400. The adapter assembly 20 drives the side of the belt 13 connected to the connecting assembly 21 to slide in a direction closer to the rotating axis 400, allowing the other side of the belt 13 connected to the fixed assembly 30 to slide in a direction away from the rotating axis 400, thereby driving the backrest 200 connected to the fixed assembly 30 to slide on the support plate 102 in a direction away from the rotating axis 400. In other words, the present application can achieve a reversing effect between the adapter assembly 20 and the fixed assembly 30 through the belt 13, so that the movement directions of the adapter assembly 20 and the backrest 200 are opposite.

[0033] In an optional embodiment, the belt assembly 10 includes a first belt assembly 10a and a second belt assembly 10b, and the first belt assembly 10a and the second belt assembly 10b are arranged at intervals along the width of the support plate 102. The first belt assembly 10a is connected to the second belt assembly 10b through a fixing assembly 30 to ensure the consistency of the movement of 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 the adapter 22 through a connecting assembly 21 to receive the angle change from the support plate 102 through the adapter assembly 20, and then convert the angle change into a linear sliding of the backrest 200 in the extension direction, so that the stability and load capacity of the adjustment of the backrest 200 can be improved by the first belt assembly 10a and the second belt assembly 10b arranged at intervals along the width direction of the support plate 102.

[0034] Exemplarily, the first belt assembly 10a and the second belt assembly 10b have the same structure, each comprising 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 in the vertical direction, the belt 13 can directly drive the backrest 200 to slide via the fixing assembly 30. The adapter assembly 20 connects the first belt assembly 10a and the second belt assembly 10b on opposite sides thereof to form a dual-point rigid support, which is used to receive angular changes from the support plate 102 and convert the angular changes into movement of the belt 13. This not only disperses the force, avoiding single-point stress concentration and unilateral deformation, but also offsets lateral torque, preventing the backrest 200 from tilting or getting stuck. The sides of the first belt assembly 10a and the second belt assembly 10b that are close to each other are connected together through a fixing assembly 30 connected to the backrest 200, so that the driving forces separating the first belt assembly 10a and the second belt assembly 10b can be concentrated together to drive the backrest 200 to move up and down, thereby improving the ability of the belt assembly 10 to drive the load.

[0035] In an optional embodiment, if 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. The slide groove 1022 communicates with the receiving cavity 1021. The belt assembly 10 is mounted within 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 then connects to the adapter 22. The adapter 22 is rotatably connected to the coupling structure 103 to form a compact and stable adjustment transmission system for the backrest 200.

[0036] Exemplarily, the adapter 22 serves as a power transmission intermediary between the connecting structure 103 and the connecting assembly 21, and is used to transmit the movement of the connecting structure 103 to the connecting assembly 21, so that the connecting assembly 21 can transmit the power to the belt 13, and then transmit it to the backrest 200 through the movement of the belt 13. Among them, the belt assembly 10 is installed in the accommodating cavity 1021, so that it is hidden inside the support plate 102, which not only plays a role in dustproof and waterproof, improves the aesthetics and safety, and extends the life of the belt 13; it also ensures that the belt 13 runs stably and avoids deviation. The connecting assembly 21 is slidably installed in the slide 1022, and can be used to realize power transmission between the inside and outside of the support plate 102. In another embodiment, the slide 1022 can also play a guiding role to realize stable adjustment of the backrest 200.

[0037] In an optional embodiment, if Figure 3 、 Figures 10 to 14 As shown, the connecting structure 103 includes a connecting plate arranged in a Z shape, the connecting plate having a first connecting segment 1031, a second connecting segment 1032 and a third connecting segment 1033, the third connecting segment 1033 is connected between the first connecting segment 1031 and the second connecting segment 1032, the first connecting segment 1031 is rotatably connected to the second rotating part 302, and the second connecting segment 1032 is rotatably connected to the adapter 22, so as to efficiently transmit the angle change of the seat 300 to the belt assembly 10 through a three-section lever design, thereby realizing precise adjustment of the backrest 200.

[0038] Exemplarily, the first connecting section 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 through a bearing, and is used to receive the rotational movement of the support plate 102 relative to the seat 300; the third connecting section 1033 serves as a transition arm, which can be connected to the first connecting section 1031 and the second connecting section 1032 by welding or integral molding, and is used to change the direction of force transmission and amplify / adjust the displacement; the second connecting section 1032 serves as an output arm, which is hinged to the adapter 22, and is used to transmit the compound 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 component 21, and efficiently convert the rotational movement of the support plate 102 into linear adjustment of the backrest 200, so as to realize multi-directional force transmission in a limited space, avoid interference with other components, and have both structural compactness and mechanical advantages.

[0039] In an optional embodiment, if Figures 3 to 11As shown, a first slide rail 1023 is provided on the support plate 102, a first slider 222 is provided on the adapter 22, and first slide rails 1023 are provided on both sides of the accommodating cavity 1021. The position of the first slider 222 corresponds to the position of the first slide rail 1023, so that the adapter 22 can be slidably connected to 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 adjustment process of the backrest 200.

[0040] 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, and 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.

[0041] In an optional embodiment, if Figure 4 、 Figure 9 and Figure 13 As shown, the support structure also includes a cover plate 104 having an open slot 1041. The cover plate 104 is mounted at the opening of the accommodating cavity 1021. The fixing assembly 30 is provided with a fixing portion 311. The position of the open slot 1041 corresponds to the position of the fixing portion 311, allowing the backrest 200 to be fixed to the fixing portion 311 through the open slot 1041. This not only achieves rapid installation and stable load-bearing of the backrest 200, but also maintains a neat appearance and protects internal transmission components. The fixing portion 311 moves along the extension direction within the open slot 1041 to ensure linear movement of the backrest 200.

[0042] In an optional embodiment, if Figures 6 to 12 As shown, the connecting assembly 21 includes a connecting shaft 213, a first clamping member 211 and a first fitting member 212. The belt 13 is fixed between the first clamping member 211 and the first fitting member 212. One end of the connecting shaft 213 is connected to the first clamping member 211 and the first fitting member 212. 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.

[0043] For example, Figure 6 and Figure 7As shown, the belt assembly 10 is accommodated in the accommodating cavity 1021, and the belt 13 is clamped between the first clamping member 211 and the first fitting member 212. One end of the connecting shaft 213 is connected to the first clamping member 211 and the first fitting 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 clamping member 211 and the first fitting member 212 to slide in the direction away from or close to the rotating shaft 400 through the connecting shaft 213, so that the first clamping member 211 and the first fitting member 212 can drive the belt 13 connected thereto to slide in the direction away from or close to the rotating shaft 400, thereby driving the belt 13 on the opposite side of the first clamping member 211 and the first fitting member 212 to slide in the opposite direction.

[0044] In an optional embodiment, if 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 clamping 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. Through the mechanical combination of the first pressure block 214 and the first fastener 215, a combination of precise mechanical engagement and controllable preload is achieved. While ensuring transmission reliability, the rigid fixation and quick disassembly of the belt 13 are also ensured, which facilitates the disassembly and maintenance of the belt 13 and the connecting component 21.

[0045] In an optional embodiment, the connecting assembly 21 includes a connecting bolt 216, a first connecting hole is provided on the first holding member 211, and a second connecting hole is provided on the first mating member 212. 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 holding 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.

[0046] For example, Figure 6 and Figure 7 As shown, the connecting bolt 216 passes through the first clamping member 211 and the first fitting member 212 and is fixedly connected to the connecting shaft 213, so that the first clamping member 211 and the first fitting member 212 can be fixed together and form a first mounting groove 2111 for fixing the belt 13, and the first pressing block 214 is installed in the first mounting groove 2111, and then the first pressing block 214 is squeezed by the first fastener 215, so that the belt 13 can be firmly fixed in the first mounting groove 2111.

[0047] In an optional embodiment, if Figure 3 、 Figures 10 to 12As shown, there are two connecting components 21, one of which is connected between the adapter plate 221 and the belt 13 of the first belt component 10a, and the other is connected between the adapter plate 221 and the belt 13 of the second belt component 10b. The two ends of the adapter plate 221 are rotatably connected to the second rotating parts 302 on both sides of the supporting structure 300a through connecting plates.

[0048] In an optional embodiment, if Figure 4 、 Figures 6 to 13 As shown, the fixing assembly 30 includes a second fitting member 32 and a second clamping member 31, the belt 13 is fixed between the second clamping member 31 and the second fitting member 32, and the backrest 200 is connected to the second clamping member 31, so that the second fitting member 32 and the second clamping member 31 cooperate to form a clamping structure for fixing the belt 13, thereby realizing a rigid connection between the belt 13 and the backrest 200, ensuring the force reliability of the force transmission between the backrest 200 and the belt 13, and effectively absorbing the impact energy.

[0049] For example, Figure 6 and Figure 8 As shown, the belt 13 includes a first belt 13a and a second belt 13b, and the second fitting part 32 is installed on both sides of the second clamping part 31 to realize the fixed connection between the first belt 13a and the second belt 13b. The backrest 200 is connected to the second clamping part 31, so that the first belt 13a and the second belt 13b can drive the backrest 200 to slide in a direction away from or close to the rotating shaft 400 through the second clamping part 31.

[0050] In an optional embodiment, if Figure 4 、 Figures 6 to 13 As shown, the fixing assembly 30 also includes a second pressure block 33 and a second fastener 34. A second mounting groove is formed between the second clamping 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, so that a stable rigid connection is formed between the belt 13 and the fixing assembly 30 through the coordinated action of the second pressure block 33 and the second fastener 34, thereby ensuring the safety of the backrest 200 when bearing loads.

[0051] In an optional embodiment, the second fitting part 32 includes a first sub-fitting part 321 and a second sub-fitting part 322, the second pressure block 33 includes a first sub-pressure block 331 and a second sub-pressure block 332, a first sub-mounting groove is formed between the first sub-fitting part 321 and the second clamping part 31, and a second sub-mounting groove is formed between the second sub-fitting part 322 and the second clamping part 31, the first sub-pressure block 331 is installed in the first sub-mounting groove through the second fastener 34, and is used to achieve a fixed connection between the fixing component 30 and the belt 13 of the first belt component 10a; the second sub-pressure block 332 is installed in the second sub-mounting groove through the second fastener 34, and is used to achieve a fixed connection between the fixing component 30 and the belt 13 of the second belt component 10b.

[0052] For example, Figure 6 and Figure 8 As 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 clamping member 31 through the first sub-fastener 341, and is used to limit 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 clamping member 31, and is used to limit 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 squeezed 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 squeezed by the second sub-fastener 342 and the second belt 13b can be firmly fixed in the second sub-mounting groove. The fixing portion 311 is located between the first belt 13a and the second belt 13b, so that the backrest 200 can be fixed to the fixing portion 311 by bolts or the like, thereby realizing a fixed connection between the backrest 200 and the fixing assembly 30, the first belt 13a and the second belt 13b.

[0053] In an optional embodiment, if Figures 4 to 10 As shown, a second slide rail 1024 is provided on the support plate 102, and a second slider 201 is provided on the backrest 200. The position of the second slider 201 corresponds to the position of the second slide rail 1024, so that the backrest 200 can be slidably connected to the support plate 102 through the cooperation between the second slider 201 and the second slide rail 1024, so as to achieve millimeter-level precise positioning of the lifting and lowering of the backrest 200 through the cooperation between the high-rigidity slide rail and the low-friction slider.

[0054] In an optional embodiment, a rotation bearing 1025 is provided between the support plate 102 and the rotation shaft 400 to ensure smooth rotation of the support plate 102 relative to the bearing structure 300 a.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediary. They can refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0056] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0057] The disclosure above provides many different embodiments or examples for realizing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0058] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations 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 any one or more embodiments or examples.

Claims

1. A wheelchair device, characterized in that: include: seats; Backrest; An adjustment mechanism, the adjustment mechanism comprising a bearing structure, a support structure and a coupling structure, the support structure comprising a transmission assembly and a support plate, the seat being connected to the bearing structure, the bearing structure being provided with a first rotating portion and a second rotating portion, the support plate being rotatably connected to the first rotating portion via a rotating shaft, the transmission assembly being mounted on the support plate, the second rotating portion and the transmission assembly being rotatably connected to the coupling structure respectively, the backrest being slidably connected to the front face of the support plate, and the backrest being transmission-connected to the transmission assembly; When the angle between the support plate and the seat increases, the backrest slides on the support plate toward the direction approaching the rotation axis; when the angle between the support plate and the seat decreases, the backrest slides on the support plate toward the direction away from the rotation axis.

2. The wheelchair device according to claim 1, characterized in that The transmission assembly includes an adapter assembly, a fixing assembly and a belt assembly. The belt assembly is built into the support plate and arranged along the sliding direction of the backrest. The connecting structure is connected to the belt assembly through the adapter assembly, and the belt assembly is connected to the backrest through the fixing assembly.

3. The wheelchair device according to claim 2, 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 on the first pulley and the second pulley. The adapter assembly and the fixing assembly are respectively fixedly connected to the belt.

4. The wheelchair device according to claim 2, wherein: The adapter assembly includes an adapter and a connecting assembly. A accommodating cavity and a slide groove are formed on the support plate. The slide groove is connected to the accommodating cavity. The belt assembly is installed in the accommodating cavity. The connecting assembly is connected to the belt of the belt assembly. The connecting assembly is connected to the adapter after at least partially passing through the slide groove. The adapter is rotatably connected to the connecting structure.

5. The wheelchair device according to claim 4, characterized in that The support plate is provided with a first slide rail, 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 between the first slider and the first slide rail; A second slide rail is provided on the support plate, and a second slider is provided on the backrest. 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.

6. The wheelchair device according to claim 4, characterized in that The support structure further comprises a cover plate with an open slot, the cover plate is mounted at the opening of the accommodating cavity, a fixing portion is provided on the fixing assembly, and the backrest is fixed to the fixing portion through the open slot.

7. The wheelchair device according to claim 4, characterized in that The connecting assembly includes a connecting shaft, a first clamping part and a first mating part. The belt is fixed between the first clamping part and the first mating part. One end of the connecting shaft is connected to the first clamping part and the first mating part. The other end of the connecting shaft passes through the slide groove and is connected to the adapter.

8. The wheelchair device according to claim 7, characterized in that: The connecting assembly includes a first pressing block and a first fastener. A first mounting groove is formed between the first clamping member and the first mating member. The first pressing block fixes the belt in the first mounting groove through the first fastener.

9. The wheelchair device according to claim 4, characterized in that The fixing assembly includes a second matching piece and a second clamping piece, the belt is fixed between the second clamping piece and the second matching piece, and the backrest is connected to the second clamping piece.

10. The wheelchair device according to claim 9, characterized in that The fixing assembly further includes a second pressing block and a second fastener. A second mounting groove is formed between the second clamping member and the second mating member. The second pressing block fixes the belt in the second mounting groove through the second fastener.

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