Wheelchair with angle-adjustable armrests

Abstract

The utility model belongs to the technical field of wheelchairs, and particularly relates to a wheelchair with adjustable armrest angles. The utility model provides a wheelchair with an adjustable armrest angle, and aims to solve the problem that the armrest angle of the wheelchair in the prior art cannot be adjusted. A wheelchair with adjustable armrest angles comprises a wheelchair body, armrests are arranged on the wheelchair body, and the armrests are rotationally connected to the wheelchair body; angle adjusting mechanisms for adjusting the angles of the armrests are arranged between the armrests and the wheelchair body; the adjustability of the angles of the armrests means that the wheelchair can be suitable for more users with different physical conditions and using habits. The wheelchair is simple in structure and convenient to use, old people needing more supports or young people who want to have a certain degree of freedom of movement can meet own requirements by adjusting the angles of the armrests, and therefore the application range of the wheelchair is wider. The design of the angle adjusting mechanism not only considers the use convenience, but also fully considers the safety.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair technology, specifically relating to a wheelchair with adjustable armrest angle. Background Technology

[0002] Wheelchairs are rehabilitation and mobility aids used by the injured, sick, disabled, elderly, or those with limited mobility. They can be used not only for medical appointments and short-distance travel, but also for long-distance outdoor activities or participation in social events. To facilitate transport and storage, current wheelchairs are typically designed to be foldable. However, existing wheelchairs have fixed armrests, which is inconvenient to use. Utility Model Content

[0003] This invention provides a wheelchair with adjustable armrest angle, aiming to solve the problem that the armrest angle of existing wheelchairs cannot be adjusted.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A wheelchair with adjustable armrest angle includes a wheelchair body, wherein armrests are provided on the wheelchair body and the armrests are rotatably connected to the wheelchair body;

[0006] An angle adjustment mechanism for adjusting the angle of the armrest is provided between the armrest and the wheelchair body;

[0007] The angle adjustment mechanism includes a rotating shaft, through which the armrest is rotatably connected to the wheelchair body. An elastic positioning plate is provided on the rotating shaft. The wheelchair body has a shaft hole that mates with the rotating shaft. The armrest has a through hole that mates with the rotating shaft. A positioning groove that mates with the elastic positioning plate is provided within the shaft hole and communicates with the shaft hole. An adjustment groove that mates with the elastic positioning plate is provided within the through hole and communicates with the through hole. There are multiple adjustment grooves, and the angle of the armrest is adjusted by mates the elastic positioning plate with different adjustment grooves.

[0008] A further improved solution: There are two elastic positioning pieces and one positioning groove, with a portion of both elastic positioning pieces located within the positioning groove.

[0009] Based on the above technical solution: by having two elastic positioning plates act simultaneously within the positioning groove, the armrest can more effectively prevent accidental rotation or wobbling after angle adjustment. This dual-locking mechanism improves the stability of the armrest at a fixed angle, ensuring the user's safety and comfort in the wheelchair. Because the two elastic positioning plates can be more evenly distributed within the positioning groove, their fit with the adjustment groove will be tighter and more precise. This facilitates fine-tuning of the armrest angle, thus meeting the personalized needs of different users, such as adapting to different body postures or comfort preferences. A single elastic positioning plate may wear or deform due to uneven force during long-term use, while the design of two elastic positioning plates can distribute the force, reducing the risk of single-piece wear. This helps extend the service life of the angle adjustment mechanism and reduce maintenance costs. Although the number of elastic positioning plates is increased, this design does not complicate the adjustment process. Users can still easily change the armrest angle by simply adjusting the armrest to align the elastic positioning plates with different adjustment grooves. Simultaneously, the synchronous movement of the two elastic positioning plates also helps maintain consistency and smoothness of adjustment.

[0010] A further improved solution: a convex ridge is formed between two adjacent adjustment slots, and the convex ridge extends between the two elastic positioning plates.

[0011] Based on the above technical solution: the presence of the protruding ridges allows the elastic positioning plate to more securely engage with the adjustment groove. The physical blocking effect of the ridges increases the stability of the locking point, preventing the armrest from easily changing angle under external force, thus ensuring the user's safety and stability in the wheelchair. The ridges, as clear boundaries between the adjustment grooves, help the user to more accurately position the armrest when adjusting the angle. The user can clearly feel the elastic positioning plate moving from one ridge to another, making it easier to achieve the desired armrest angle adjustment. The ridge design not only increases the structural strength between the adjustment grooves but also makes the entire angle adjustment mechanism more robust and durable. This helps resist wear and deformation during long-term use, extending the wheelchair's lifespan.

[0012] A further improved solution: the elastic positioning piece is bonded to the rotating shaft.

[0013] Based on the above technical solutions, bonding is simpler and faster than other connection methods (such as threaded connections and welding), requiring no additional fasteners or complex processes, thus reducing production costs and assembly time. The adhesive provides strong bonding force, ensuring the elastic positioning piece adheres firmly to the pivot, preventing it from easily falling off or loosening. Bonding has broad applicability, suitable for connecting different materials. This means that when designing wheelchairs, more suitable material combinations can be selected to meet different performance requirements.

[0014] A further improved solution: A limiter is also provided on the pivot, and the armrest is located between the limiter and the wheelchair body.

[0015] Based on the above technical solution: the limiter prevents the armrests from detaching from the wheelchair body during rotation, thus protecting the wheelchair's stability. This helps extend the wheelchair's lifespan and reduces maintenance and parts replacement costs. The limiter's design makes armrest adjustment smoother and more controllable. As an additional component on the pivot, the limiter enhances the stability of the entire pivot structure. It helps resist external forces on the pivot, maintaining a secure connection of the armrests.

[0016] A further improved solution: The limiter is fixed to the rotating shaft by screws.

[0017] Based on the above technical solution: fixing the limiter to the pivot shaft with screws ensures that the limiter will not loosen or fall off due to external forces during use. This stable connection method guarantees that the limiter can always perform its function of limiting the armrest angle. Screw connections are easy to install and remove. During the production or repair of wheelchairs, workers can easily install or remove the limiter by tightening or loosening the screws. This helps improve production efficiency and facilitates wheelchair maintenance. The flexibility of screw connections allows the limiter to adapt to different installation environments and needs. For example, different wheelchair models or configurations may require different sizes or types of limiters. Screw connections allow for easy replacement or adjustment of the limiter to meet the needs of different users. As a crucial component of the wheelchair structure, the stability of the limiter directly affects the overall stability and safety of the wheelchair. Securely fixing the limiter to the pivot shaft with screws improves the reliability of the entire wheelchair structure and ensures user safety during use.

[0018] A further improved solution: The wheelchair body is provided with a protruding post, the protruding post and the wheelchair body are an integral structure, and the shaft hole and the positioning groove are both provided on the protruding post.

[0019] Based on the above technical solution: the protruding column and the wheelchair body are an integral structure, meaning they are connected by integral molding or casting. This connection method generally has higher strength and rigidity than components connected by bolts, welding, etc. Therefore, the presence of the protruding column enhances the structural strength of the wheelchair body and improves the wheelchair's load-bearing capacity. The shaft holes and positioning grooves are all located on the protruding column, a design that allows for more accurate positioning of the armrests during installation and adjustment. Since the protruding column is an independent component with a defined shape and size, it provides a stable and reliable installation reference for the armrests and pivots. This helps ensure the stability and accuracy of the armrests during adjustment. The integral structure of the protruding column and the wheelchair body means that some additional processing steps and the use of fasteners can be reduced during manufacturing. This helps reduce production costs and improve production efficiency. At the same time, the reduction in the use of fasteners also reduces safety hazards caused by loose or detached fasteners. The protruding column design allows for a simpler and more streamlined overall appearance of the wheelchair. By integrating the shaft holes and positioning grooves onto the protruding column, it is possible to avoid creating additional holes or grooves on the wheelchair body, thus maintaining the integrity and aesthetics of the wheelchair.

[0020] A further improved solution: The handrail is provided with a horizontal column, which is an integral structure with the handrail. The through hole and the adjustment groove are both provided on the horizontal column.

[0021] Based on the above technical solution: the crossbar and handrail adopt an integrated structure, which enhances the overall stability of the handrail. When subjected to external forces or the weight of the user, the crossbar can effectively distribute stress, preventing deformation or damage to the handrail, thereby ensuring user safety. The through holes and adjustment grooves on the crossbar make the handrail adjustment process more intuitive and convenient. Users can easily adjust the angle simply by rotating the handrail. This design reduces the complexity and time cost of the adjustment process. The presence of the crossbar optimizes the force distribution of the handrail. When the user places their arm on the handrail, the crossbar can distribute the weight of the arm, reducing concentrated pressure on any single part of the handrail. This helps improve user comfort and reduce fatigue caused by prolonged use. The design of the crossbar not only enhances the practicality of the handrail but also improves its aesthetics. The simple and smooth lines and the integrally formed structure make the handrail more beautiful and elegant, conforming to modern aesthetic trends. At the same time, the through holes and adjustment grooves on the crossbar also take into account both practicality and convenience.

[0022] A further improved solution: the diameter of the convex post is equal to the diameter of the transverse post.

[0023] Based on the above technical solution, the equal diameter of the convex and transverse columns creates a visually symmetrical aesthetic, enhancing the overall harmony of the wheelchair. More importantly, this symmetry helps improve the balance and stability of the wheelchair structure. When subjected to external forces, the symmetrical structure can more effectively distribute stress, preventing damage caused by localized overload. The equal diameter of the convex and transverse columns allows for processing using the same molds or tools, simplifying the manufacturing process. This helps reduce production costs and improve production efficiency. Simultaneously, uniform dimensions reduce assembly problems caused by dimensional differences. When the diameters of the convex and transverse columns are equal, the stress distribution at their joints is more uniform. This helps reduce wear or deformation caused by uneven stress, extending the wheelchair's lifespan.

[0024] A further improved solution: the convex post and the transverse post are arranged coaxially.

[0025] Based on the above technical solutions: Coaxial design means that the axes of the convex and transverse columns coincide, which enhances the stability of the wheelchair structure. When the armrests are adjusted or subjected to external forces, the coaxially arranged convex and transverse columns work together to resist deformation, maintaining the overall stability of the wheelchair. Coaxially arranged convex and transverse columns optimize stress distribution. When the armrests bear the user's weight or external forces, the coaxial design allows stress to be distributed more evenly on the convex and transverse columns, reducing the risk of localized overload and extending the wheelchair's lifespan. The coaxial design of the convex and transverse columns is visually more harmonious and aesthetically pleasing. This design makes the overall appearance of the wheelchair more streamlined and concise, conforming to modern aesthetic trends. At the same time, the coaxial arrangement of the convex and transverse columns also helps to enhance the quality and sophistication of the wheelchair.

[0026] The beneficial effects of this utility model are as follows:

[0027] The adjustable armrest angle of this invention means that this wheelchair can be suitable for users with more different physical conditions and usage habits. Whether it is an elderly person who needs more support or a young person who wants a certain degree of freedom of movement, they can adjust the armrest angle to meet their needs, which makes the wheelchair more widely applicable.

[0028] The angle adjustment mechanism is designed not only for ease of use but also for safety. Through the cooperation of the elastic positioning plate and the adjustment groove, the armrest can be securely locked at the desired angle, avoiding safety hazards caused by armrest wobbling. At the same time, this design also helps maintain the stability of the wheelchair during movement.

[0029] The angle adjustment mechanism has a relatively simple structure and is easy to disassemble and clean. This makes the maintenance and upkeep of the wheelchair more convenient in daily use, helping to extend the wheelchair's lifespan. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a wheelchair with adjustable armrest angle according to the present invention.

[0032] Figure 2 This is an exploded view of the assembly point between the armrest and the wheelchair body in a wheelchair with adjustable armrest angle according to this utility model.

[0033] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0034] Explanation of the labels in the diagram:

[0035] 1-Wheelchair body; 2-Armrest; 3-Spinning shaft; 4-Elastic positioning plate; 5-Positioning groove; 6-Adjustment groove; 7-Limiter; 8-Protruding column; 9-Horizontal column. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by users of the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] refer to Figures 1 to 3 A wheelchair with an adjustable armrest 2 includes a wheelchair body 1, wherein an armrest 2 is provided on the wheelchair body 1 and the armrest 2 is rotatably connected to the wheelchair body 1;

[0038] An angle adjustment mechanism for adjusting the angle of the armrest 2 is provided between the armrest 2 and the wheelchair body 1;

[0039] The angle adjustment mechanism includes a rotating shaft 3. The armrest 2 is rotatably connected to the wheelchair body 1 via the rotating shaft 3. An elastic positioning piece 4 is provided on the rotating shaft 3. The wheelchair body 1 is provided with a shaft hole that mates with the rotating shaft 3. The armrest 2 is provided with a through hole that mates with the rotating shaft 3. A positioning groove 5 that mates with the elastic positioning piece 4 is provided in the shaft hole. The positioning groove 5 communicates with the shaft hole. An adjustment groove 6 that mates with the elastic positioning piece 4 is provided in the through hole. There are multiple adjustment grooves 6. The angle of the armrest 2 is adjusted by having the elastic positioning piece 4 mate with different adjustment grooves 6.

[0040] Specifically: There are two elastic positioning pieces 4, and one positioning groove 5. Parts of both elastic positioning pieces 4 are located within the positioning groove 5. The elastic positioning pieces 4 can be made of materials such as rubber. A raised ridge is formed between two adjacent adjusting grooves 6, and the raised ridge extends between the two elastic positioning pieces 4. The elastic positioning pieces 4 are bonded to the rotating shaft 3. The elastic positioning pieces 4 can also be fixed to the rotating shaft 3 with screws.

[0041] The rotating shaft 3 is further provided with a limiter 7, and the armrest 2 is located between the limiter 7 and the wheelchair body 1. The limiter 7 is fixed to the rotating shaft 3 by screws. The limiter 7 is provided with a hole through which the screw passes, and the rotating shaft 3 is provided with a screw hole that mates with the screw. The screw and the screw hole mate to fix the limiter 7 to the rotating shaft 3.

[0042] The wheelchair body 1 is provided with a protruding post 8, which is an integral structure with the wheelchair body 1. The shaft hole and the positioning groove 5 are both provided on the protruding post 8. The armrest 2 is provided with a horizontal post 9, which is an integral structure with the armrest 2. The through hole and the adjustment groove 6 are both provided on the horizontal post 9. The diameter of the protruding post 8 is equal to the diameter of the horizontal post 9. The protruding post 8 and the horizontal post 9 are coaxially arranged. Flexible pads such as sponge pads can be adhered to the armrest 2 to provide a better operating experience for users.

[0043] The working principle of this embodiment:

[0044] When using, adjust the handrail 2 to a neutral and easy-to-operate position. Rotate the handrail 2 to overcome the elastic force of the elastic positioning piece 4, causing the elastic positioning piece 4 to deform elastically and disengage from the current adjustment slot 6. At this time, the handrail 2 will be in a freely rotating state. Hold the handrail 2 and rotate it up or down to the desired angle as needed. During rotation, maintain moderate force to avoid excessive force that could cause damage. When the handrail 2 is rotated to the desired angle, the elastic positioning piece 4 will automatically engage with the corresponding adjustment slot 6. At this time, the handrail 2 will be firmly locked at that angle. Gently shake the handrail 2 to confirm that it is firmly locked and there is no shaking or slippage.

[0045] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A wheelchair with an angle-adjustable armrest, characterized by: The wheelchair body is provided with armrests which are pivotally connected to the wheelchair body; An angle adjusting mechanism is arranged between the armrests and the wheelchair body to adjust the angle of the armrests; The angle adjusting mechanism comprises a pivot, the armrests are pivotally connected to the wheelchair body via the pivot, the pivot is provided with elastic positioning pieces, the wheelchair body is provided with an axle hole which cooperates with the pivot, the armrests are provided with through holes which cooperate with the pivot, the axle hole is provided with positioning grooves which cooperate with the elastic positioning pieces, the positioning grooves are in communication with the axle hole, the through holes are provided with adjusting grooves which cooperate with the elastic positioning pieces, the adjusting grooves are in communication with the through holes, the adjusting grooves are multiple, and the angle of the armrests is adjusted by making the elastic positioning pieces cooperate with different adjusting grooves.

2. The wheelchair of claim 1, wherein: The elastic positioning pieces are two, and the positioning grooves are one, and a part of the two elastic positioning pieces are located in the positioning grooves.

3. The wheelchair of claim 2, wherein: Convex edges are formed between adjacent two adjusting grooves, and the convex edges extend to between the two elastic positioning pieces.

4. The wheelchair of claim 3, wherein: The elastic positioning pieces are bonded to the pivot.

5. The wheelchair of claim 1, wherein: The pivot is further provided with a stopper, and the armrests are located between the stopper and the wheelchair body.

6. The wheelchair of claim 5, wherein: The stopper is fixed to the pivot via a screw.

7. The wheelchair of claim 1, wherein: The wheelchair body is provided with a convex column which is an integral structure with the wheelchair body, and the axle hole and the positioning grooves are arranged on the convex column.

8. The wheelchair of claim 7, wherein: The armrests are provided with a horizontal column which is an integral structure with the armrests, and the through holes and the adjusting grooves are arranged on the horizontal column.

9. The wheelchair of claim 8, wherein: The diameter of the convex column is equal to the diameter of the horizontal column.

10. The wheelchair of claim 9, wherein: The convex column and the horizontal column are coaxially arranged.

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