Wheelchair armrest capable of being overturned up and down to adjust angle
By installing a position adjustment device between the wheelchair armrest crossbar and the fixed base, the problem that existing wheelchair armrests cannot adapt to the needs of different users is solved, and multi-position angle adjustment and comfort are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-04-07
AI Technical Summary
Existing wheelchair armrests cannot adapt to the needs of users with different heights, sitting postures and body conditions, and cannot be positioned at the angle after being flipped over, resulting in discomfort during use.
A position adjustment device is installed between the handrail crossbar and the fixed base. The angle positioning of the handrail crossbar after flipping up and down is fixed by the position adjustment device, including the design of the position adjustment elastic locking pin and the position hole, so as to realize the multi-position adjustment of the angle.
It improves the comfort of wheelchair armrests, adapts to the needs of users with different heights, sitting postures and physical conditions, is easy to operate, has a reasonable structure, and is low in cost.
Smart Images
Figure CN224085586U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wheelchair technology, specifically a wheelchair armrest that can be tilted up and down to adjust its angle. Background Technology
[0002] 1. Existing Chinese patent document publication number: CN118986648A discloses a foldable wheelchair, which further includes an armrest assembly. The armrest assembly includes an armrest bar and an armrest support bar. The armrest bar is arranged parallel above the seat bar. The rear end of the armrest bar is rotatably and slidably connected to the middle of the backrest bar. The armrest support bar extends obliquely from the rear lower part to the front upper part. The lower end of the armrest support bar is rotatably connected to the lower end of the backrest bar. The upper end of the armrest support bar is rotatably connected to the middle of the armrest bar.
[0003] The aforementioned armrest assembly can adjust the rotation of the armrest bar, but it cannot be positioned at the angle after being flipped over, and cannot adapt to the needs of users with different heights, different sitting postures, and different body conditions.
[0004] 2. Existing Chinese patent document publication number: CN307490794S, discloses a wheelchair frame, from reference... Figure 7 , Figure 9 As can be seen, the rear end of the handrail crossbar is connected to the rear of the fixed base via a hinge device. The top of the fixed base is provided with a handrail positioning groove for positioning the handrail crossbar. The handrail crossbar and the handrail positioning groove are arranged in the same axial direction. The handrail crossbar can be flipped up and down and opened in the handrail positioning groove.
[0005] The aforementioned wheelchair frame armrest crossbar can be flipped up and down, but it cannot be positioned at the angle after flipping, thus failing to meet the needs of users with different heights, sitting postures, and physical conditions. Furthermore, the available space for setting angle positioning / position adjustment devices on the armrest crossbar is limited. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model provides a wheelchair armrest with few components, convenient operation, and a positioning function that allows for vertical tilting and angle adjustment. By incorporating a position adjustment device between the armrest crossbar and the fixed base, the armrest crossbar's angle is fixed after vertical rotation via this device. This design is simple to operate, adaptable to users of different heights, sitting postures, and body conditions, and improves comfort when using the armrest. The solution to the above technical problems is as follows:
[0007] A wheelchair armrest with adjustable angle by flipping up and down includes an armrest crossbar and a fixed base. The rear end of the armrest crossbar is rotatably connected to the rear of the fixed base via a hinge device. The top of the fixed base is provided with an armrest positioning groove for positioning the armrest crossbar. The armrest crossbar and the armrest positioning groove are arranged along the same axis. The armrest crossbar can be flipped up and down and opened in the armrest positioning groove. A stop adjustment device is provided between the armrest crossbar and the fixed base. The angle positioning of the armrest crossbar after flipping up and down is fixed by the stop adjustment device.
[0008] A further preferred technical solution: the gear adjustment device consists of a gear adjustment elastic locking pin and a gear hole provided on the side wall of the rear section of the handrail; the gear adjustment elastic locking pin is horizontally disposed on the outer side wall of the fixed base; the gear adjustment elastic locking pin is inserted into the gear hole to fix the angle positioning of the handrail after it is flipped up and down.
[0009] A further preferred technical solution: the gear adjustment elastic locking pin includes an outer operating handle, a return spring, an inner pin, and a pin hole disposed on the outer wall of the armrest positioning groove. The inner section of the inner pin is a large-diameter rod head, and the outer section of the inner pin is a small-diameter rod body. The inner pin passes through the pin hole, and the outer end of the small-diameter rod body is fixedly connected to the outer operating handle. The pin hole has a large-diameter section and a small-diameter section, with the small-diameter section disposed on the outer section of the pin hole and the large-diameter section disposed on the inner section of the pin hole. The large-diameter head of the inner pin can pass through the large straight hole section but cannot pass through the small-diameter hole section. The return spring is fixed to the small-diameter rod body that passes through the inner pin. One end of the return spring presses against the large-diameter head of the inner pin and the other end presses against the inner bottom wall of the large-diameter hole section. The outer operating handle and the inner pin can move elastically inside and outside the pin hole through the return spring. The large-diameter head of the inner pin is inserted into the stop hole to fix the angle positioning of the handrail crossbar after it flips up and down.
[0010] A further preferred technical solution: there is at least one stop hole.
[0011] Further, in the preferred technical solution: there are two to four stop holes, arranged at different heights; the stop adjustment elastic locking pin is inserted into the stop holes at different heights to adjust the different height angles of the handrail crossbar after it is flipped up and down.
[0012] A further preferred technical solution: the rear section of the handrail crossbar extends downward with a lower protrusion; the stop hole is provided on the lower protrusion and the rear section of the handrail crossbar body; the bottom end of the handrail positioning groove is provided with a concave hole, and the lower protrusion can be inserted into the concave hole.
[0013] Further, in the preferred technical solution: the handrail crossbar is integrally formed and can be made of plastic or metal; the fixing base is integrally formed and can be made of plastic or metal.
[0014] A further preferred technical solution: the hinge device includes a hinge shaft, a shaft hole one located at the rear end of the handrail crossbar, and a shaft hole two located at the rear of the fixed base. The hinge shaft passes through the shaft hole one and the shaft hole two, and the handrail crossbar can be tilted up and down to adjust its angle based on the hinge shaft.
[0015] Further, in the preferred technical solution: the fixing seat can be connected to one side of the wheelchair backrest rod via screw assembly or other existing connection methods.
[0016] A further preferred technical solution: the adjustable angle range of the handrail crossbar is 0° to 90°.
[0017] The beneficial effects of this camping lamp are as follows: 1. By setting a position adjustment device between the handrail crossbar and the fixed base, the angle of the handrail crossbar after flipping up and down is fixed by the position adjustment device. This design is reasonable, easy to operate, and adaptable to the needs of users with different heights, sitting postures, and body conditions, improving the comfort of letting go. 2. The lower protrusion increases the number of position holes and facilitates vertical arrangement. The position holes are set on the lower protrusion and the rear section of the handrail crossbar. The lower protrusion can be inserted into the concave hole at the bottom of the handrail positioning groove. This design increases the product's stability and the range of position hole settings without changing the diameter of the handrail crossbar, resulting in a simple process and low cost. 3. The handrail crossbar and the fixed base are integrally molded, with fewer parts, making installation convenient. Attached Figure Description
[0018] Figure 1 This is a front left perspective view of the product of this utility model;
[0019] Figure 2 This is a rear left perspective view of the product of this utility model;
[0020] Figure 3 This is a rear right perspective view of the product of this utility model;
[0021] Figure 4 This is a perspective view of the handrail crossbar, fixing base, and hinge device of the present utility model.
[0022] Figure 5 This is an exploded view of the handrail crossbar, fixing base, and hinge device of the present invention.
[0023] Figure 6 This is an exploded view of the handrail crossbar, fixing seat, hinge device, and gear adjustment elastic locking pin of the present utility model product;
[0024] Figure 7 This is an exploded view of the handrail crossbar, fixing seat, hinge device, and gear adjustment elastic locking pin of the present utility model product;
[0025] Figures 8 to 10 This is a cross-sectional view of the fixing base and the adjustable elastic locking pin of this utility model product, wherein,
[0026] Figure 8 The two are currently separated. Figure 9 Both are installed in a state where no external force is applied. Figure 10 When the two parts are installed together, the gear adjustment elastic locking pin is in a state of elastic outward translation under external force.
[0027] Figure 11 This is an exploded view of the gear-adjusting elastic locking pin of this utility model product;
[0028] Figures 12 to 14 This is a schematic diagram illustrating the three-position adjustment of the elastic locking pin in this utility model product. Figure 12 In the lowest setting, Figure 13 It is in a mid-range state. Figure 14 It is in its highest setting.
[0029] Figures 15 to 17 This is a schematic diagram showing the three-position adjustment of the product after it is installed on a wheelchair. Figure 15 In the lowest setting, Figure 16 It is in a mid-range state. Figure 17 It is in the highest setting.
[0030] Handrail crossbar (1), fixing seat (2), handrail positioning groove (3), gear adjustment elastic locking pin (4), outer section operating handle (4.1), return spring (4.2), inner section pin (4.3), large diameter rod head (4.3.1), small diameter rod body (4.3.2), pin hole (4.4), large diameter section (4.4.1), small diameter section (4.4.2), gear hole (5), hinge device (6), hinge shaft (6.1), shaft hole one (6.2), shaft hole two (6.3), lower protrusion (7), concave hole (8) Detailed Implementation
[0031] An adjustable wheelchair armrest includes an armrest crossbar 1 and a fixed base 2. The rear end of the armrest crossbar 1 is rotatably connected to the rear of the fixed base 2 via a hinge device 6. The top of the fixed base 2 is provided with an armrest positioning groove 3 for positioning the armrest crossbar 1. The armrest crossbar 1 and the armrest positioning groove 3 are arranged along the same axis. The armrest crossbar 1 can be flipped open and positioned in the armrest positioning groove 3. A stop adjustment device is provided between the armrest crossbar 1 and the fixed base 2. The armrest crossbar 1 is fixed in angle after being flipped up and down by the stop adjustment device. The depth and shape of the armrest positioning groove 3 are perfectly fitted to accommodate the rear section of the armrest crossbar 1. When the armrest crossbar 1 is not rotated, the top surface of the armrest positioning groove 3 and the top surface of the armrest crossbar 1 remain on the same horizontal line, providing good user comfort, with no protrusions or obvious gaps.
[0032] The rear end of the handrail crossbar rotates up and down relative to the rear of the fixed base via a hinge device. By setting a stop adjustment device between the handrail crossbar and the fixed base, the angle positioning of the handrail crossbar after flipping up and down is fixed by the stop adjustment device. This design is reasonable, easy to operate, and adaptable to the needs of users with different heights, different sitting postures and different body conditions, thus improving the comfort of letting go.
[0033] The gear adjustment device of this utility model consists of a gear adjustment elastic locking pin 4 and a gear position hole 5 disposed on the side wall of the rear section of the handrail crossbar 1. The gear adjustment elastic locking pin 4 is horizontally disposed on the outer side wall of the fixed base 2. The gear adjustment elastic locking pin 4 is inserted into the gear position hole 5 to fix the angle positioning of the handrail crossbar 1 after it is flipped up and down. The purpose of setting the gear adjustment elastic locking pin 4 is that the gear adjustment elastic locking pin 4 can automatically reset after being released from operation and automatically slide into the gear position hole 5 for easy locking. At the same time, it is elastic and will not automatically slide out / fall out.
[0034] The gear-adjusting elastic locking pin 4 of this utility model includes an outer operating handle 4.1, a return spring 4.2, an inner pin 4.3, and a pin hole 4.4 disposed on the outer wall of the armrest positioning groove 3. The inner section of the inner pin 4.3 is a large-diameter rod head 4.3.1, and the outer section of the inner pin 4.3 is a small-diameter rod body 4.3.2. The inner pin 4.3 passes through the pin hole 4.4, and the outer end of the small-diameter rod body 4.3.2 of the inner pin 4.3 is fixedly connected to the outer operating handle 4.1. The inner pin 4.3 and the outer operating handle 4.1 are made of plastic and are fixedly connected by special plastic glue. The pin hole 4.4 has a large-diameter section 4.4.1 and a small-diameter section 4.4.2. The small-diameter section 4.4.2 is located on the outer section of the pin hole 4.4, and the large-diameter section 4.4.1 is located on the inner section of the pin hole 4.4. The large-diameter rod head 4.3.1 of the inner section pin 4.3 can just fit through the large-diameter section 4.4.1 but cannot fit through the small-diameter section 4.4.2. The return spring 4.2 is fixedly connected to the small-diameter rod body 4.3.2 that passes through the inner section pin 4.3. One end of the return spring 4.2 presses against the inner section pin 4.3. The large-diameter rod head 4.3.1 of the inner pin 4.3 is pressed against the inner bottom wall of the large-diameter hole section 4.4.1; the inner pin 4.3 can move elastically inside and outside the pin hole 4.4 through the return spring 4.2; the large-diameter rod head 4.3.1 of the inner pin 4.3 is inserted into the stop hole 5 to fix the angle positioning of the handrail crossbar 1 after it is flipped up and down; there are two stop holes 5, which are set at different heights; the stop adjustment elastic locking pin 4 is inserted into the stop holes 5 at different heights to adjust the different height angle positioning of the handrail crossbar 1 after it is flipped up and down.
[0035] When it is necessary to adjust the handrail crossbar to the first position / non-rotating state / horizontal state, the user operates the outer section operating handle to pull the inner section pin rod outward elastically, so that the large diameter rod head moves into the large diameter hole section. Then, the handrail crossbar is placed horizontally in the handrail positioning groove. Finally, the outer section operating handle is released, and the rebound force of the return spring 4.2 is used to make the large diameter rod head press against the outer wall of the handrail crossbar.
[0036] When it is necessary to adjust the handrail crossbar to the second position, the user operates the outer section operating handle to pull the inner section pin rod outward elastically, so that the large diameter rod head moves into the large diameter hole section. Then, the handrail crossbar is flipped upward to the appropriate position, and the outer section operating handle is released. The rebound force of the return spring is used to insert the large diameter rod head into the highest position stop hole.
[0037] When it is necessary to adjust the handrail crossbar to the third position, the user operates the outer section operating handle to pull the inner section pin rod outward elastically, so that the large diameter rod head moves into the large diameter hole section. Then, the handrail crossbar is flipped upward to the appropriate position, and the outer section operating handle is released. The rebound force of the return spring is used to insert the large diameter rod head into the lowest position stop hole.
[0038] When it is necessary to adjust the handrail crossbar to return to the non-rotating / initial / horizontal state, the user operates the outer section operating handle to pull the inner section pin rod outward elastically, so that the large diameter rod head moves into the large diameter hole section. Then, after the handrail crossbar is flipped down to the appropriate position, the outer section operating handle is released, and the rebound force of the return spring is used to insert the large diameter rod head into the highest position stop hole.
[0039] The handrail crossbar 1 of this utility model has a downwardly extending lower protrusion 7 at its rear end; the stop hole 5 is provided on the lower protrusion 7 and the rear end body of the handrail crossbar 1; the bottom end of the handrail positioning groove 3 is provided with a concave hole 8, into which the lower protrusion 7 can be inserted. The lower protrusion increases the number of stop holes and facilitates vertical arrangement. The design of placing the stop holes on the lower protrusion and the rear end body of the handrail crossbar, and allowing the lower protrusion to be inserted into the concave hole at the bottom end of the handrail positioning groove, increases product stability and the range of stop hole placement without changing the diameter of the handrail crossbar. This results in a simple process and low cost.
[0040] The present invention has at least one or two to four gear holes 5 to enable multi-gear adjustment.
[0041] The handrail crossbar 1 of this utility model is integrally formed and can be made of plastic or metal; the fixing base 2 is integrally formed and can be made of plastic or metal; both the handrail crossbar and the fixing base are integrally formed, with fewer parts and convenient installation.
[0042] The hinge device 6 of this utility model includes a hinge shaft 6.1, a shaft hole 6.2 located at the rear end of the handrail crossbar 1, and a shaft hole 6.3 located at the rear of the fixed base 2. The hinge shaft 6.1 passes through the shaft hole 6.2 and the shaft hole 6.3. The handrail crossbar 1 can be tilted up and down to adjust its angle based on the hinge shaft 6.1.
[0043] The fixing base 2 of this utility model can be connected to one side of the wheelchair backrest rod by means of screw assembly or other existing connection methods.
[0044] The adjustable angle range of the handrail crossbar 1 described in this utility model is 0° to 90°.
Claims
1. A wheelchair armrest with adjustable angle that can be flipped up and down, comprising an armrest crossbar (1) and a fixed base (2), wherein the rear end of the armrest crossbar (1) is rotatably connected to the rear part of the fixed base (2) via a hinge device (6), and the top of the fixed base (2) is provided with an armrest positioning groove (3) for positioning the armrest crossbar (1), the armrest crossbar (1) and the armrest positioning groove (3) are arranged in the same axial direction, and the armrest crossbar (1) can be flipped up and down and opened in the armrest positioning groove (3), characterized in that: A gear adjustment device is provided between the handrail crossbar (1) and the fixed seat (2); the gear adjustment device consists of a gear adjustment elastic locking pin (4) and a gear hole (5) provided on the side wall of the rear section of the handrail crossbar (1); the gear adjustment elastic locking pin (4) is horizontally provided on the outer side wall of the fixed seat (2); the gear adjustment elastic locking pin (4) is inserted into the gear hole (5) to fix the angle positioning of the handrail crossbar (1) after it is flipped up and down.
2. The wheelchair armrest with adjustable angle that can be flipped up and down as described in claim 1, characterized in that: The gear-adjusting elastic locking pin (4) includes an outer operating handle (4.1), a return spring (4.2), an inner pin (4.3), and a pin hole (4.4) located on the outer wall of the handrail positioning groove (3). The inner section of the inner pin (4.3) is a large-diameter rod head (4.3.1), and the outer section of the inner pin (4.3) is a small-diameter rod body (4.3.2). The inner pin (4.3) passes through the pin hole (4.4), and the outer end of the small-diameter rod body (4.3.2) of the inner pin (4.3) is fixedly connected to the outer operating handle (4.1). The pin hole (4.4) has a large-diameter hole section (4.4.1) and a small-diameter hole section (4.4.2). The small-diameter hole section (4.4.2) is located on the outer section of the pin hole (4.4), and the large-diameter hole section (4.4.1) is located on the outer wall of the pin hole (4.4). The inner section of the hole (4.4) has a large-diameter rod head (4.3.1) that can pass through the large-diameter hole section (4.4.1) but cannot pass through the small-diameter hole section (4.4.2). The return spring (4.2) is fixed to the small-diameter rod body (4.3.2) that passes through the inner section pin (4.3). One end of the return spring (4.2) presses against the large-diameter rod head (4.3.1) of the inner section pin (4.3) and the other end presses against the inner bottom wall of the large-diameter hole section (4.4.1). The inner section pin (4.3) can move elastically inside and outside the pin hole (4.4) through the return spring (4.2). The large-diameter rod head (4.3.1) of the inner section pin (4.3) is inserted into the stop hole (5) to fix the angle positioning of the handrail crossbar (1) after it flips up and down.
3. The wheelchair armrest with adjustable angle that can be flipped up and down as described in claim 2, characterized in that: There is at least one stop hole (5).
4. The wheelchair armrest with adjustable angle that can be flipped up and down as described in claim 3, characterized in that: There are two to four stop holes (5), which are set at different heights; the stop adjustment elastic locking pin (4) is inserted into the stop holes (5) at different heights to adjust the different height angles of the handrail crossbar (1) after it is flipped up and down.
5. The wheelchair armrest with adjustable angle that can be flipped up and down as described in claim 4, characterized in that: The rear section of the handrail crossbar (1) has a downward protrusion (7); the stop hole (5) is provided on the lower protrusion (7) and the rear section of the handrail crossbar (1); the bottom end of the handrail positioning groove (3) is provided with a concave hole (8), and the lower protrusion (7) can be inserted into the concave hole (8).
6. The wheelchair armrest with adjustable angle that can be flipped up and down as described in any one of claims 1 to 5, characterized in that: The handrail crossbar (1) is integrally formed and is made of plastic or metal; the fixing base (2) is integrally formed and is made of plastic or metal.
7. The wheelchair armrest with adjustable angle that can be flipped up and down as described in any one of claims 1 to 5, characterized in that: The hinge device (6) includes a hinge shaft (6.1), a shaft hole one (6.2) located at the rear end of the handrail crossbar (1), and a shaft hole two (6.3) located at the rear of the fixed base (2). The hinge shaft (6.1) passes through the shaft hole one (6.2) and the shaft hole two (6.3). The handrail crossbar (1) can be tilted up and down to adjust its angle based on the hinge shaft (6.1).
8. The wheelchair armrest with adjustable angle that can be flipped up and down as described in any one of claims 1 to 5, characterized in that: The adjustable angle range of the handrail crossbar (1) is 0°~90°.
Citation Information
Patent Citations
Foldable wheelchair
CN118986648A
wheelchair frame
CN307490794S