Wheelchair armrest device and electric wheelchair
By designing a wheelchair armrest device with a rotating limit link and limit structure, the safety risks in the process of getting on and off the existing wheelchair or electric wheelchair is solved, and a safer way to get on and off the vehicle is achieved.
Patent Information
- Application Number
- CN202420697959.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-07
AI Technical Summary
There are obvious safety risks in the process of getting on and off the vehicle of existing wheelchairs or electric wheelchairs. When users get on and off the vehicle, they are likely to bring thrust to the wheelchair parallel to the direction of travel, resulting in rushing and increasing safety hazards.
A wheelchair armrest device is designed, including an armrest that is movably connected to the wheelchair frame. One end of the armrest is articulated with the wheelchair frame, and the rotation limit link is slidly connected to the armrest. The limit structure defines the relative sliding range between the rotation limit rod and the armrest, ensuring that the rotation range of the armrest is only between the top armrest perpendicular or parallel to the wheelchair back.
By rotating and closing the armrest of the wheelchair, lateral blocking is achieved, reducing the safety risks caused by the wheelchair's easy movement when getting on and off the vehicle in the forward direction, and improving the safety of users getting on and off the vehicle.
Smart Images
Figure CN222604844U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a wheelchair armrest device and an electric wheelchair. Background Art
[0002] With the continuous increase in the number of elderly people in China and the increasing demand for diversified travel by special disabled groups, electric wheelchairs have gradually become an indispensable means of transportation in the market. Electric wheelchairs are a type of mechanical equipment equipped with an electric drive device based on a traditional hand-cranked wheelchair. Most electric wheelchairs are mainly composed of a wheelchair frame, a drive motor, a controller, and a battery. Unlike traditional wheelchairs, electric wheelchairs have a special interactive structure that allows the wheelchair to move through manual or other forms of instructions, and can complete the action alone without relying on other external assistance.
[0003] The wheelchair bracket usually includes a side frame, a bottom bracket, a seat bracket, a wheel bracket and other parts. The specific bracket distribution structure varies depending on the technical requirements of the wheelchair's load-bearing requirements, folding and storage requirements, etc. However, there are some problems in the use of general wheelchairs or electric wheelchairs. Specifically, when the user gets on and off the wheelchair, during normal use, the user can basically only get on and off between the armrests on both sides of the wheelchair. This process of getting on and off can easily give the wheelchair a thrust parallel to its original direction of travel, causing the wheelchair to move during the user's getting on and off, posing a great safety hazard. To solve this problem, some wheelchair designs use a specially set simple brake mechanism to temporarily lock the wheelchair's wheels to prevent position movement. However, even with this structure, there are still cases where the user does not use the brake or uses the brake improperly, and the use of this structure often requires manual operation, which still causes inconvenience and safety risks.
[0004] In summary, there are technical problems with obvious safety risks in the process of getting on and off existing wheelchairs or electric wheelchairs. Utility Model Content
[0005] The technical problem to be solved by the utility model is that there are obvious safety risks in the process of getting on and off the existing wheelchairs or electric wheelchairs.
[0006] To solve the above problems, the utility model provides a wheelchair armrest device, including an armrest frame movably connected to the wheelchair frame, one end of the armrest frame is hinged to the frame body of the wheelchair frame located on the outer side of the seat cushion position, and also includes a rotation limit link, one end of the rotation limit link is rotatably connected to the wheelchair frame, and the other end of the rotation limit link is slidably connected to the armrest frame, and the rotation limit link is provided with a limiting structure at the position where the rotation limit link is connected to the armrest frame, which is used to limit the relative sliding range between the rotation limit rod and the armrest frame, so as to limit the rotation angle range of the armrest frame around the connection position with the wheelchair frame, and the rotation range of the armrest frame is limited to the position from the top armrest being perpendicular to the backrest of the wheelchair to the top armrest being parallel to the backrest of the wheelchair.
[0007] This design is completely different from the traditional wheelchair armrests. It allows users to rotate the wheelchair armrests to open the side barriers of the wheelchair and achieve the purpose of getting in and out of the vehicle sideways. This method greatly reduces the safety risks caused by the easy movement of the wheelchair when getting in and out of the vehicle. Specifically, the armrest frame itself and the wheelchair frame are connected in an end-hinged manner, so that the armrest frame itself has the freedom to rotate and open, and a rotation limit connecting rod is connected to the armrest frame, and one end of the structure is connected to the armrest frame. Due to the limiting structure provided on it, the rotation range of the armrest frame is limited, so that the top armrest on the armrest frame can be rotated to be perpendicular to the back of the wheelchair. This state is the normal use state of the armrest, and the top armrest can be rotated to be parallel to the back of the wheelchair. This state is the state of the armrest being opened, and the side blocking structure of the wheelchair is opened, so that the user can directly turn around and get on and off the wheelchair from the side. It should be noted that the concepts of vertical and parallel mentioned in the embodiment are not strict angles of 90° or 180°, but are in an approximate angle range. As long as the armrest is normally laid flat for use and rotated sideways to open for the convenience of users to get on and off, the specific angle is determined by the overall design of the wheelchair.
[0008] As a preferred solution, the handrail frame is slidably matched with the rotation limit connecting rod through a pin mechanism provided thereon, and the limiting structure on the rotation limit connecting rod is a through slide groove provided in the opposite direction along its length, and the end of the pin mechanism passes through the slide groove. This design optimizes the mutual sliding matching mode between the handrail frame and the rotation limit connecting rod, and the matching between the slide groove and the pin mechanism can achieve the relative sliding motion effect, and the rotation angle range of the handrail frame can be limited by the length of the slide groove itself.
[0009] As a preferred solution, the slide groove is provided with a positioning structure at a position corresponding to the top armrest of the armrest frame being perpendicular to the back of the wheelchair, and the pin mechanism is provided with an angle lock structure that cooperates with the positioning structure to lock the angle of the armrest frame. This design optimizes the slide groove design, and a positioning structure is provided thereon to specifically position the armrest frame at a certain angle, so as to position the armrest frame of the wheelchair at a normal use angle, that is, the top armrest of the armrest frame is approximately perpendicular to the back of the wheelchair, so as to ensure the stability of the wheelchair in use.
[0010] As a preferred solution, the positioning structure of the slide slot is a positioning hole connected to the end of the slide slot, and the aperture of the positioning hole is larger than the slot diameter of the slide slot; the pin shaft mechanism includes a pin body vertically passing through the handrail frame and the rotation limit connecting rod, the length of the pin body is larger than the sum of the overlapping thicknesses of the handrail frame and the rotation limit connecting rod, and has a preset axial length margin, and the pin body is provided with a radially expanded shoulder structure at one end portion of the corresponding slide slot, and the outer diameter of the shoulder structure is matched with the aperture of the positioning hole to lock the position of the pin body in the slide slot and lock the angle of the handrail frame. This design optimizes the design of the positioning structure, which is a positioning hole located at one end of the slide slot. The aperture of the positioning hole is larger than the slot diameter of the slide slot. In coordination with the structure, a radially expanded shoulder structure is provided on the pin body on the side where the pin shaft mechanism cooperates with the slide slot. During the sliding process of the pin body in the slide slot, the lateral non-expanded portion of the pin body cooperates with the slide slot for sliding. When sliding to the position of the positioning hole, the pin body is pulled axially so that its shoulder structure is embedded in the positioning hole. The concave-convex coordination of the two locks the position of the pin body, thereby fixing the rotation angle of the handrail.
[0011] As a preferred solution, the pin body is provided with enlarged end structures at both ends of its axial direction, which are used to limit the position of the pin body to the slide slot of the rotation limit connecting rod and the mounting hole of the handrail frame. The outer side surface of the pin body is sleeved with a compression spring, and the pin body is pressed against one side of the handrail frame by the compression spring, so that when the pin body slides to the position of the positioning hole, the shoulder structure sinks into the positioning hole under the elastic action. This design optimizes the structural design of the pin mechanism, and limits its axial movement range through the end structures at both ends to avoid it from slipping out of the connection position between the handrail frame and the rotation limit rod. A compression spring is further provided so that when the pin body slides to the position of the positioning hole of the slide slot, it can be directly ejected under the action of elastic force, so that the shoulder structure enters the positioning hole to achieve locking.
[0012] As a preferred solution, the pin mechanism also includes a sleeve structure sleeved outside the pin body, the compression spring is located in the sleeve structure, and the pin body is rotatably matched with the handrail frame through the sleeve structure. This design further optimizes the pin mechanism, with a sleeve structure sleeved outside to accommodate the compression spring, which can protect the internal spring through the structure, and with the sleeve and the mounting hole on the handrail frame, the wear on the pin body is avoided.
[0013] As a preferred solution, the inner edge of the sleeve structure is provided with a boss structure at one end adjacent to the rotation limiting link, which is used to limit the end of the compression spring, and the other end of the compression spring is matched with the end structure of the pin body at the outer edge of the handrail frame. This design optimizes the internal structure of the sleeve structure, and limits the position of the compression spring by the internal boss.
[0014] As a preferred solution, the armrest frame has a bent and widened structure, so that there is a preset horizontal spacing between the top armrest and the cushion of the wheelchair, so as to increase the space in the width direction above the wheelchair cushion. This design optimizes the structure of the armrest frame, widens the area above the wheelchair cushion by bending itself, and increases the usable space inside the wheelchair.
[0015] As a preferred solution, the pin is installed in the widened area above the armrest, and the rotation limit connecting rod is bent in a Z-shape to avoid the bent and widened structure of the armrest. This design is adapted to the bent and widened structure of the above-mentioned armrest, and the rotation limit connecting rod is adaptively structurally optimized. By Z-bending to avoid the bending position of the armrest, the structural integrity of the wheelchair armrest is ensured.
[0016] The utility model also provides an electric wheelchair, comprising a wheelchair frame, a power device and a wheel assembly device, and also comprising a wheelchair armrest device as described in any one of the above items. Since the above wheelchair armrest device has the above beneficial effects, an electric wheelchair equipped with the wheelchair armrest device should also have corresponding beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the overall structure of a wheelchair armrest device provided by the utility model;
[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the other side of the middle wheelchair armrest device;
[0019] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the middle wheelchair armrest device;
[0020] Figure 4 for Figure 1A schematic diagram of the structure of the pin mechanism of the middle wheelchair armrest device;
[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the rotation limit connecting rod of the wheelchair armrest device.
[0022] in, Figure 1-Figure 5 middle:
[0023] 1. Handrail frame; 1-1. Top handrail; 1-2. Bending and widening structure; 2. Rotation limit connecting rod; 2-1. Slide groove; 2-2. Positioning hole; 3. Pin mechanism; 3-1. Pin body; 3-2. Shoulder structure; 3-3. Bushing structure; 3-4. Compression spring; 3-5. End structure; 4. Wheelchair frame. DETAILED DESCRIPTION
[0024] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] refer to Figure 1-Figure 5 , Figure 1 A schematic diagram of the overall structure of a wheelchair armrest device provided by the utility model; Figure 2 for Figure 1 A schematic diagram of the structure of the other side of the middle wheelchair armrest device; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the middle wheelchair armrest device; Figure 4 for Figure 1 A schematic diagram of the structure of the pin mechanism of the middle wheelchair armrest device; Figure 5 for Figure 1 Schematic diagram of the structure of the rotation limit connecting rod of the wheelchair armrest device.
[0026] The present embodiment provides a wheelchair armrest device, including an armrest frame 1 movably connected to the wheelchair frame 4, one end of the armrest frame 1 is hinged to the frame body of the wheelchair frame 4 located on the outer side of the seat cushion position, and also includes a rotation limit link 2, one end of the rotation limit link 2 is rotatably connected to the wheelchair frame 4, and the other end of the rotation limit link 2 is slidably connected to the armrest frame 1, and the rotation limit link 2 is provided with a limiting structure at the position where the rotation limit link 2 is connected to the armrest frame 1, which is used to limit the relative sliding range between the rotation limit rod and the armrest frame 1, so as to limit the rotation angle range of the armrest frame 1 around the connection position with the wheelchair frame 4, and the rotation range of the armrest frame 1 is limited to the position from the top armrest 1-1 being perpendicular to the backrest of the wheelchair to the top armrest 1-1 being parallel to the backrest of the wheelchair.
[0027] This design is completely different from the traditional wheelchair armrests. It allows users to rotate the wheelchair armrests to open the side barriers of the wheelchair and achieve the purpose of getting in and out of the vehicle sideways. This method greatly reduces the safety risks caused by the easy movement of the wheelchair when getting in and out of the vehicle. Specifically, the armrest frame 1 itself is connected to the frame of the wheelchair in an end-hinged manner, so that the armrest frame 1 itself has the freedom to rotate and open, and a rotation limit connecting rod 2 is connected to the armrest frame 1, and one end of the structure is connected to the armrest frame 1. Due to the limiting structure arranged on it, the rotation range of the armrest frame 1 is limited, so that the top armrest 1-1 on the armrest frame 1 can be rotated to be perpendicular to the back of the wheelchair. This state is the normal use state of the armrest, and the top armrest 1-1 can be rotated to be parallel to the back of the wheelchair. This state is the state where the armrest 1 is opened and the side blocking structure of the wheelchair is opened, so that the user can directly turn around and get on and off the wheelchair from the side. It should be noted that the concepts of vertical and parallel mentioned in the embodiment are not strict angles of 90° or 180°, but are in an approximate angle range. As long as the armrest is normally laid flat for use and rotated sideways to open for the convenience of users to get on and off, the specific angle is determined by the overall design of the wheelchair.
[0028] In the technical solution provided in this embodiment, the handrail frame 1 is slidably matched with the rotation limit connecting rod 2 through the pin mechanism 3 provided thereon, and the limiting structure on the rotation limit connecting rod 2 is a through slide groove 2-1 provided in the opposite direction along its length, and the end of the pin mechanism 3 passes through the slide groove 2-1. This design optimizes the mutual sliding matching mode between the handrail frame 1 and the rotation limit connecting rod 2, and the matching between the slide groove 2-1 and the pin mechanism 3 can not only achieve the relative sliding motion effect, but also can limit the rotation angle range of the handrail frame 1 through the length of the slide groove 2-1 itself.
[0029] In the technical solution provided in this embodiment, the slide groove 2-1 is provided with a positioning structure at the position where the top armrest 1-1 of the armrest frame 1 is perpendicular to the back of the wheelchair, and the pin mechanism 3 is provided with an angle lock structure that cooperates with the positioning structure to lock the angle of the armrest frame 1. This design optimizes the design of the slide groove 2-1, and a positioning structure is provided thereon to specifically position the armrest frame 1 at a certain angle, so as to position the armrest frame 1 of the wheelchair at a normal use angle, that is, the top armrest 1-1 of the armrest frame 1 is approximately perpendicular to the back of the wheelchair, so as to ensure the stability of the wheelchair in use.
[0030] In the technical solution provided in this embodiment, the positioning structure of the slide groove 2-1 is a positioning hole 2-2 connected to the end of the slide groove 2-1, and the aperture of the positioning hole 2-2 is larger than the slot diameter of the slide groove 2-1; the pin mechanism 3 includes a pin body 3-1 that vertically passes through the handrail frame 1 and the rotation limit link 2, the length of the pin body 3-1 is larger than the sum of the overlapping thicknesses of the handrail frame 1 and the rotation limit link 2, and has a preset axial length margin, and the pin body 3-1 is provided with a radially expanded shoulder structure 3-2 at one end corresponding to the slide groove 2-1, and the outer diameter of the shoulder structure 3-2 is matched with the aperture of the positioning hole 2-2 to lock the position of the pin body 3-1 in the slide groove 2-1, thereby locking the angle of the handrail frame 1.
[0031] The axial direction of the pin body 3-1 of the pin mechanism 3 vertically passes through the mounting hole at the corresponding position of the handrail frame 1 and the slide groove 2-1 on the rotation limit link 2. This design optimizes the design of the positioning structure, which is a positioning hole 2-2 located at one end of the slide groove 2-1. The aperture of the positioning hole 2-2 is larger than the groove diameter of the slide groove 2-1. In coordination with the structure, a radially expanded shoulder structure 3-2 is provided on the pin body 3-1 on the matching side of the pin mechanism 3 and the slide groove 2-1. During the sliding process of the pin body 3-1 in the slide groove 2-1, the lateral non-expanded part of the pin body 3-1 slides with the slide groove 2-1. When sliding to the position of the positioning hole 2-2, the pin body 3-1 is axially pulled to make its shoulder structure 3-2 embedded in the positioning hole 2-2. The concave-convex cooperation between the two locks the position of the pin body 3-1, thereby fixing the rotation angle of the handrail frame 1.
[0032] In the technical solution provided in this embodiment, the pin body 3-1 is provided with enlarged end structures 3-5 at both ends of its axial direction, which are used to limit the position of the pin body 3-1 to the slide groove 2-1 of the rotation limit link 2 and the mounting hole of the handrail frame 1. The outer side surface of the pin body 3-1 is sleeved with a compression spring 3-4, and the pin body 3-1 is pressed against the side of the handrail frame 1 by the compression spring 3-4, so that when the pin body 3-1 slides to the position of the positioning hole 2-2, the shoulder structure 3-2 sinks into the positioning hole 2-2 under the action of elasticity. In addition, the preferred design is that a split structure is adopted between the end of the pin body 3-1 facing the handrail frame 1 and the pin body 3-1, and the two are connected by threads. This design facilitates the compression spring 3-4 and the sleeve structure 3-3 to be installed in the preset position.
[0033] This design optimizes the structural design of the pin mechanism 3, and limits its axial movement range through the end structures 3-5 at both ends to avoid it from slipping out of the connection position between the handrail frame 1 and the rotation limit rod. A compression spring 3-4 is further provided so that when the pin body 3-1 slides to the position of the positioning hole 2-2 of the slide groove 2-1, it can be directly popped out under the action of the elastic force, so that the shoulder structure 3-2 enters the positioning hole 2-2 to achieve locking.
[0034] In the technical solution provided in this embodiment, the pin mechanism 3 also includes a sleeve structure 3-3 sleeved outside the pin body 3-1, and the compression spring 3-4 is located in the sleeve structure 3-3. The pin body 3-1 can be rotatably matched with the handrail frame 1 through the sleeve structure 3-3. This design further optimizes the pin mechanism 3, and the sleeve structure 3-3 is sleeved outside to accommodate the compression spring 3-4. The internal spring can be protected by the structure, and the sleeve and the mounting hole on the handrail frame 1 can be flexibly matched with each other to avoid wear on the pin body 3-1.
[0035] In the technical solution provided in this embodiment, a boss structure is provided at one end of the inner edge of the sleeve structure 3-3 adjacent to the rotation limiting link 2, which is used to limit the end of the compression spring 3-4, and the other end of the compression spring 3-4 is matched with the end structure 3-5 of the pin body 3-1 at the outer edge of the handrail frame 1. This design optimizes the internal structure of the sleeve structure 3-3, and limits the position of the compression spring 3-4 by the internal boss.
[0036] In the technical solution provided in this embodiment, the armrest frame 1 has a bent and widened structure 1-2, so that there is a preset horizontal spacing between the top armrest 1-1 and the cushion of the wheelchair to increase the width direction of the space above the wheelchair cushion. This design optimizes the structure of the armrest frame 1, widens the area above the wheelchair cushion by bending itself, and increases the usable space inside the wheelchair.
[0037] In the technical solution provided in this embodiment, the pin is installed in the area of the widened side above the handrail frame 1, and the rotation limit link 2 is bent in a Z-shape to avoid the bent widening structure 1-2 of the handrail frame 1. This design is adapted to the bent widening structure 1-2 of the handrail frame 1, and the rotation limit link 2 is adaptively optimized in structure, and the structural integrity of the wheelchair armrest is ensured by avoiding the bent position of the handrail frame 1 through Z-shape bending.
[0038] This embodiment also provides an electric wheelchair, including a wheelchair frame 4, a power device and a wheel assembly device, and also includes a wheelchair armrest device as in any of the above embodiments. Since the above wheelchair armrest device has the above beneficial effects, an electric wheelchair equipped with the wheelchair armrest device should also have corresponding beneficial effects.
[0039] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A wheelchair armrest device, comprising an armrest frame (1) movably connected to a wheelchair frame (4), characterized in that: One end of the armrest frame (1) is hinged to a frame body of the wheelchair frame (4) located on the outer side of the seat cushion position, and also includes a rotation limit link (2), one end of the rotation limit link (2) is rotatably connected to the wheelchair frame (4), and the other end of the rotation limit link (2) is slidably connected to the armrest frame (1), and a limiting structure is provided at the position where the rotation limit link (2) is connected to the armrest frame (1), which is used to limit the relative sliding range between the rotation limit link (2) and the armrest frame (1), thereby limiting the rotation angle range of the armrest frame (1) around the connection position between the armrest frame (4) and the wheelchair frame (4), and limiting the rotation range of the armrest frame (1) to the position from the top armrest (1-1) being perpendicular to the back of the wheelchair to the position from the top armrest (1-1) being parallel to the back of the wheelchair.
2. The wheelchair armrest device according to claim 1, characterized in that: The handrail frame (1) is slidably matched with the rotation limit connecting rod (2) through a pin shaft mechanism (3) arranged thereon; the limit structure on the rotation limit connecting rod (2) is a through slide groove (2-1) arranged in the opposite direction along its length; the end of the pin shaft mechanism (3) passes through the slide groove (2-1).
3. The wheelchair armrest device according to claim 2, characterized in that: The slide groove (2-1) is provided with a positioning structure at a position corresponding to the top armrest (1-1) of the armrest frame (1) perpendicular to the wheelchair backrest, and the pin mechanism (3) is provided with an angle locking structure that cooperates with the positioning structure to lock the angle of the armrest frame (1).
4. The wheelchair armrest device according to claim 3, characterized in that: The positioning structure of the slide groove (2-1) is a positioning hole (2-2) connected to the end of the slide groove (2-1), and the aperture of the positioning hole (2-2) is larger than the groove diameter of the slide groove (2-1); the pin shaft mechanism (3) comprises a pin body (3-1) vertically passing through the handrail frame (1) and the rotation limit connecting rod (2), the length of the pin body (3-1) is larger than the sum of the overlapping thicknesses of the handrail frame (1) and the rotation limit connecting rod (2), and has a preset axial length margin, and the pin body (3-1) is provided with a radially expanded shoulder structure (3-2) at one end portion corresponding to the slide groove (2-1), and the outer diameter of the shoulder structure (3-2) matches the aperture of the positioning hole (2-2) to lock the position of the pin body (3-1) in the slide groove (2-1), thereby locking the angle of the handrail frame (1).
5. The wheelchair armrest device according to claim 4, characterized in that: The pin body (3-1) is provided with enlarged end structures (3-5) at both ends of its axial direction, which are used to limit the position of the pin body (3-1) to the slide groove (2-1) of the rotation limit connecting rod (2) and the installation hole of the handrail frame (1); the outer side surface of the pin body (3-1) is sleeved with a compression spring (3-4), and the pin body (3-1) is pressed against one side of the handrail frame (1) by the compression spring (3-4), so that when the pin body (3-1) slides to the position of the positioning hole (2-2), the shoulder structure (3-2) sinks into the positioning hole (2-2) under the action of elasticity.
6. The wheelchair armrest device according to claim 5, characterized in that: The pin mechanism (3) further comprises a sleeve structure (3-3) sleeved outside the pin body (3-1), the compression spring (3-4) being located inside the sleeve structure (3-3), and the pin body (3-1) being rotatably matched with the handrail frame (1) via the sleeve structure (3-3).
7. The wheelchair armrest device according to claim 6, characterized in that: The inner edge of the shaft sleeve structure (3-3) is provided with a boss structure at one end adjacent to the rotation limiting connecting rod (2), which is used to limit the end of the compression spring (3-4) against each other, and the other end of the compression spring (3-4) is matched with the end structure (3-5) of the pin body (3-1) at the outer edge of the handrail frame (1).
8. The wheelchair armrest device according to any one of claims 2 to 7, characterized in that: The armrest frame (1) has a bent and widened structure (1-2), so that a preset lateral spacing exists between the top armrest (1-1) and the cushion of the wheelchair, thereby increasing the space above the cushion of the wheelchair in the width direction.
9. The wheelchair armrest device according to claim 8, characterized in that: The pin shaft is installed in the area of the widened side above the handrail frame (1), and the rotation limiting connecting rod (2) is bent in a Z-shape to avoid the bent widening structure (1-2) of the handrail frame (1).
10. An electric wheelchair, comprising a wheelchair frame (4), a power device and a wheel assembly, characterized in that: It also includes a wheelchair armrest device as described in any one of claims 1-9.