Wheelchair with quick-release supporting leg assembly

Abstract

The wheelchair comprises a wheelchair body, two frame front connecting rods in a frame of the wheelchair body are of a through pipe structure with the two ends open, front wheels of the wheelchair are installed at the bottom of a through pipe, and the tops of the two frame front connecting rods are movably connected with connecting pieces; the frame front connecting rod is connected with one end of a supporting leg pipe through a connecting piece, and the other end of the supporting leg pipe is rotationally connected with a pedal. Supporting pipes are welded to the outer side walls of the supporting leg pipes. A supporting piece matched with the supporting pipe is installed on the outer side wall of the frame front connecting rod through a bolt. A locking assembly is further arranged between the supporting pipe and the frame front connecting rod. According to the utility model, the wheelchair part is designed into a quickly detachable structure, so that the flexibility and maintainability of the wheelchair are improved; a user or a nurse can easily disassemble or assemble the supporting leg assembly according to needs, and particularly, the supporting leg assembly can quickly adapt to different use scenes during rehabilitation training.

Description

Technical Field

[0001] This utility model relates to the field of wheelchairs, and more particularly to a wheelchair with a quick-release leg assembly. Background Technology

[0002] As an important tool to assist people with mobility impairments, wheelchairs are receiving increasing attention from all sectors of society in terms of design and development. While providing basic mobility functions, traditional wheelchairs are also gradually moving towards a more humane and convenient direction. However, in the actual use of wheelchairs, especially for users who need to frequently change usage scenarios or conduct rehabilitation training, the design of the support leg components of traditional wheelchairs often presents many inconveniences.

[0003] Traditional wheelchairs typically use a fixed design for their outriggers, which are connected to the wheelchair body by welding, bolts, or other means. While this design is structurally sound, it is particularly cumbersome when the outriggers need to be disassembled or adjusted. Users or caregivers often need to use specialized tools and go through complex procedures to complete the disassembly or installation process, which is not only time-consuming and laborious but also increases the difficulty of operation and safety risks.

[0004] Furthermore, with the development of rehabilitation medicine, more and more patients need to switch between different devices such as wheelchairs and standing trainers. For example, when a patient wants to stand up, the footrest can significantly hinder the movement. The fixed leg design of traditional wheelchairs obviously cannot meet this need, limiting the flexibility and adaptability of the wheelchair. Utility Model Content

[0005] In order to solve the problem of insufficient flexibility and adaptability of wheelchairs in the prior art, this utility model provides a wheelchair with quick-release support leg assembly;

[0006] The wheelchair with quick-release leg assembly provided by this utility model adopts the following technical solution:

[0007] A wheelchair with a quick-release leg assembly includes a wheelchair body. Two front connecting rods within the frame of the wheelchair body are through-tube structures with openings at both ends. The front wheels of the wheelchair are mounted at the bottom of these through-tubes. Connectors are movably connected to the tops of the two front connecting rods. One end of each front connecting rod is connected to a leg tube via a connector, and the other end of the leg tube is rotatably connected to a footrest. A support tube is welded to the outer wall of each leg tube. A support member that mates with the support tube is bolted to the outer wall of each front connecting rod. A locking assembly is also provided between the support tube and the front connecting rod.

[0008] Furthermore, the connector includes an adapter block, a first adapter, and a second adapter; the adapter block has an L-shaped structure, with the first adapter and the second adapter integrally formed at both ends; the second adapter is used to connect with the top opening of the front connecting rod of the frame and has a cylindrical structure; the first adapter is used to connect with the support leg and has a cross-shaped structure.

[0009] Furthermore, the support member includes a locking part and a slot; the support member is movably connected to the outer side wall of the front connecting rod of the frame through the locking part, and is fixed in position by bolts to prevent slippage; the support member has a slot with the same cross-section as the support tube on the side near the support tube.

[0010] Furthermore, the engaging part is a ring-shaped structure with an opening;

[0011] Furthermore, the support tube has an internal mounting hole, and a sleeve is welded inside the mounting hole; a positioning pin is provided inside the sleeve; a screw is integrally formed on the top of the positioning pin; the top of the screw passes through the top of the sleeve and is threadedly connected to a handle; a spring is provided between the positioning pin and the inside of the sleeve; one end of the spring is engaged with the outer wall of the positioning pin, and the other end abuts against the inner wall of the sleeve near the handle; a positioning block is bolted to the outer wall of the front connecting rod of the frame; the positioning block has a positioning hole that mates with the positioning pin.

[0012] Furthermore, the end of the positioning pin that mates with the positioning hole is rounded.

[0013] Furthermore, a leg support strap is detachably connected between the two outrigger tubes; the two ends of the leg support strap are wrapped around the outrigger tubes and then secured with Velcro.

[0014] Furthermore, the outer wall of the outrigger tube is bolted with a limit clamp to clamp the leg support strap and prevent it from sliding up and down on the outer wall of the outrigger tube.

[0015] In summary, the beneficial effects of this utility model are as follows:

[0016] This invention designs a quick-detachable structure for parts of the wheelchair. By adding locking components, support parts, and connectors, in the locked state, the positioning pin is inserted into the positioning block on the front connecting rod of the frame for a secure fixation. When unlocking is required, pulling the handle compresses the spring of the positioning pin, causing it to disengage from the positioning block. Once unlocked, lifting the handle allows the support tube to be pulled out of the support block, and the leg tube to be pulled out of the connector to disassemble the leg. This improves the wheelchair's flexibility and maintainability. Users or caregivers can easily disassemble or install the leg components as needed, especially during rehabilitation training, allowing for quick adaptation to different usage scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall installation of the support leg of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal overall structure of the support leg of this utility model;

[0020] Figure 4 This utility model Figure 3 An enlarged schematic diagram of part A in the middle;

[0021] Figure 5 This is a schematic diagram of the overall structure of the connector of this utility model;

[0022] Figure 6 This is a schematic diagram of the overall structure of the support component of this utility model.

[0023] As shown in the figure: 1-Wheelchair body, 2-Front connecting rod of the frame, 3-Leg tube, 31-Support tube, 32-Pedal, 5-Locking assembly, 51-Sleeve, 52-Positioning pin, 53-Screw, 54-Spring, 55-Handle, 56-Positioning block, 57-Positioning hole, 6-Connector, 61-Adapter block, 62-First adapter, 63-Second adapter, 7-Support, 71-Clamping part, 72-Slot, 8-Leg support strap, 81-Limiting clip. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described in detail below:

[0025] This utility model discloses a wheelchair with a quick-release leg assembly, such as... Figure 1 , 2As shown, the wheelchair includes a main body 1. Two front connecting rods 2 within the frame of the main body 1 are open-ended tubular structures. The front wheels of the wheelchair are mounted at the bottom of these tubular structures. Connectors 6 are movably connected to the tops of the two front connecting rods 2. One end of a leg support tube 3 is connected to the front connecting rod 2 via the connector 6, and the other end of the leg support tube 3 is rotatably connected to a footrest 32. A support tube 31 is welded to the outer wall of the leg support tube 3. A support member 7, which mates with the support tube 31, is bolted to the outer wall of the front connecting rod 2. A locking assembly 5 is also provided between the support tube 31 and the front connecting rod 2. In this embodiment, the main body 1 includes a frame, and the two front connecting rods 2 within the frame are designed as open-ended tubular structures, allowing the leg support tube 3 to be inserted and fixed internally. Movable connection points are designed at the tops of the two front connecting rods 2 for connecting the leg support assembly. The outrigger assembly consists of several parts, including the outrigger tube 3, pedal 32, support tube 31, support component 7, and locking assembly 5, which work together to achieve quick disassembly. The through-tube structure and movable connection points allow the wheelchair's outriggers to be quickly disassembled and installed as an independent module, improving the wheelchair's flexibility and maintainability. Users or caregivers can easily disassemble or install the outrigger assembly as needed, especially during rehabilitation training, enabling rapid adaptation to different usage scenarios. It also helps patients undergoing rehabilitation training to quickly remove the pedal 32 when they want to stand up, preventing the pedal 32 from interfering with their standing motion.

[0026] like Figure 5 As shown, the connector 6 includes an adapter block 61, a first adapter 62, and a second adapter 63. The adapter block 61 has an L-shaped structure, with the first adapter 62 and the second adapter 63 integrally formed at both ends. The second adapter 63 is used to connect to the top opening of the front connecting rod 2 of the frame and has a cylindrical structure. The first adapter 62 is used to connect with the support leg and has a cross-section in the shape of a cross. In this embodiment, the second adapter 63 is designed to be cylindrical and fits tightly with the top opening of the front connecting rod 2 of the frame to achieve an insert connection. The first adapter 62 is designed to have a cross-section in the shape of a cross, which makes it easier to connect with the support leg tube 3, ensuring the stability and strength of the connection and preventing loosening or detachment during use.

[0027] like Figure 6As shown, the support member 7 includes a locking part 71 and a slot 72. The support member 7 is movably connected to the outer side wall of the front connecting rod 2 of the frame through the locking part 71, and is fixed in position by bolts to prevent slippage. The support member 7 has a slot 72 with the same cross-section as the support tube 31 on the side near the support tube 31. In this embodiment, the locking part 71 is designed as an annular structure with an opening, which can fit tightly against the outer side wall of the front connecting rod 2 of the frame and be fixed by bolts. This makes the installation and removal of the support member 7 simple and quick. The slot 72 is designed on the side of the support member 7 near the support tube 31, and matches the cross-section of the support tube 31 to accommodate and support the support tube 31.

[0028] like Figure 6 As shown, the engaging part 71 is a ring-shaped structure with an opening. In this embodiment, the engaging part 71 can tightly wrap around the outer wall of the front connecting rod 2 of the frame through this structure, increasing the contact area to improve friction and prevent slippage during use; thus improving the stability of the connection. In addition, the support member 7 as a whole can be made of a soft material, such as rubber or silicone, to reduce wear and scratches on the front connecting rod 2 of the frame.

[0029] like Figure 3 , 4 As shown, the support tube 31 has an internal mounting hole, and a sleeve 51 is welded inside the mounting hole; a positioning pin 52 is provided inside the sleeve 51; a screw 53 is integrally formed on the top of the positioning pin 52; the top of the screw 53 passes through the top of the sleeve 51 and is threadedly connected to a handle 55; a spring 54 is provided between the positioning pin 52 and the inside of the sleeve 51; one end of the spring 54 is engaged on the outer side wall of the positioning pin 52, and the other end abuts against the inner side wall of the sleeve 51 near the handle 55; a positioning block 56 is bolted to the outer side wall of the front connecting rod 2 of the frame; a positioning hole 57 is provided inside the positioning block 56 to cooperate with the positioning pin 52; in this embodiment Inside the sleeve 51, a positioning pin 52 is installed. The positioning pin 52 works in conjunction with the sleeve 51 through a screw 53 and a spring 54. In the locked state, the positioning pin 52 is inserted into the positioning block 56 on the front connecting rod 2 of the frame for a secure fixation. When unlocking is required, the positioning pin 52 is pulled upward by pulling the handle 55 to compress the spring 54, causing the positioning pin 52 to disengage from the positioning block 56. Once unlocked, the support tube 31 can be lifted upward to pull it out of the support block, and then the outrigger tube 3 can be pulled out of the connector 6 to complete the disassembly of the outrigger. This improves the ease of use, and the robust locking mechanism ensures the stability and safety of the outrigger assembly during use.

[0030] like Figure 4As shown, the end of the positioning pin 52 that mates with the positioning hole 57 is rounded. In this embodiment, the rounding treatment allows the positioning pin 52 to be inserted into the positioning hole 57 more smoothly, reducing the difficulty of operation and preventing wear and damage to the positioning pin 52 and the positioning hole 57 due to friction during long-term use.

[0031] like Figure 1 , 2 As shown, a leg support strap 8 is detachably connected between the two leg tubes 3; the two ends of the leg support strap 8 are wrapped around the leg tubes 3 and then fixed with Velcro; in this embodiment, the leg support strap 8 improves the user's comfort and reduces leg pressure, and the detachable design makes the cleaning and maintenance of the leg support strap 8 simpler and more convenient.

[0032] like Figure 2 As shown, the outer wall of the outrigger tube 3 is connected to a limit clamp 81 by bolts, which is used to clamp the leg support strap 8 to prevent it from sliding up and down on the outer wall of the outrigger tube 3.

[0033] The implementation principle of this utility model embodiment is as follows:

[0034] When using this invention, the user must first ensure that the wheelchair is stable and placed on a flat and safe surface. Then, the user grasps the handle 55 on the support tube 31, and by holding the handle 55 steadily and applying a moderate upward pulling force, the spring 54 will be gradually compressed, pushing the positioning pin 52 upward along its axis until it is completely disengaged from the positioning block 56 on the front connecting rod 2 of the frame. This unlocking process requires the user to keep their hands stable and pay attention to the compression state of the spring 54 to ensure safety. Once the positioning pin 52 is successfully unlocked, the user can begin to disassemble the support tube 31 and the outrigger tube 3. First, gently lift the support tube 31 upward, while using slight rotation or left-right swaying motions to help it be smoothly pulled out of the slot 72 of the support member 7. Then, the user needs to find a suitable angle and force to pull the outrigger tube 3 out of the connector 6 in a smooth and even manner. During this process, the user can use their other hand to hold the other end of the front connecting rod 2 of the frame or the outrigger tube 3 to maintain overall balance and prevent accidental slippage.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wheelchair with a quick-release leg assembly, comprising a wheelchair body (1), wherein two front frame connecting rods (2) within the frame of the wheelchair body (1) are through-tube structures with open ends, and the front wheels of the wheelchair are installed at the bottom of the through-tubes, characterized in that; The top of the two front connecting rods (2) of the frame is movably connected to a connector (6); one end of the support leg tube (3) is connected to the front connecting rod (2) of the frame through the connector (6), and the other end of the support leg tube (3) is rotatably connected to a pedal (32); a support tube (31) is welded to the outer wall of the support leg tube (3); a support member (7) that cooperates with the support tube (31) is installed on the outer wall of the front connecting rod (2) of the frame by bolts; a locking assembly (5) is also provided between the support tube (31) and the front connecting rod (2) of the frame.

2. A wheelchair with a quick-release leg assembly according to claim 1, characterized in that... The connector (6) includes an adapter block (61), a first adapter (62), and a second adapter (63); the adapter block (61) has an L-shaped structure, with the first adapter (62) and the second adapter (63) integrally formed at both ends; the second adapter (63) is used to connect with the top opening of the front connecting rod (2) of the frame, and has a cylindrical structure; the first adapter (62) is used to connect with the support leg, and has a cross-shaped structure.

3. A wheelchair with a quick-release leg assembly according to claim 1, characterized in that... The support member (7) includes a locking part (71) and a slot (72); the support member (7) is movably connected to the outer side wall of the front connecting rod (2) of the frame through the locking part (71) and is fixed in position by bolts to prevent slippage; the support member (7) has a slot (72) with the same cross section as the support tube (31) on the side near the support tube (31).

4. A wheelchair with a quick-release leg assembly according to claim 3, characterized in that... The engaging part (71) is a ring-shaped structure with an opening.

5. A wheelchair with a quick-release leg assembly according to claim 1, characterized in that... The support tube (31) has an installation hole inside, and a sleeve (51) is welded inside the installation hole; a positioning pin (52) is provided inside the sleeve (51); a screw (53) is integrally formed on the top of the positioning pin (52); a handle (55) is threadedly connected to the top of the sleeve (51) through the top of the screw (53); a spring (54) is provided between the positioning pin (52) and the inside of the sleeve (51); one end of the spring (54) is stuck on the outer side wall of the positioning pin (52), and the other end abuts against the inner side wall of the sleeve (51) near the handle (55); a positioning block (56) is bolted to the outer side wall of the front connecting rod (2) of the frame; a positioning hole (57) that cooperates with the positioning pin (52) is provided inside the positioning block (56).

6. A wheelchair with a quick-release leg assembly according to claim 5, characterized in that... The end of the positioning pin (52) that mates with the positioning hole (57) is rounded.

7. A wheelchair with a quick-release leg assembly according to claim 1, characterized in that... A leg support strap (8) is detachably connected between the two support tubes (3); the two ends of the leg support strap (8) are wrapped around the support tubes (3) and then fixed with Velcro.

8. A wheelchair with a quick-release leg assembly according to claim 1, characterized in that... The outer wall of the outrigger tube (3) is connected to a limit clamp (81) by bolts, which is used to clamp the leg support strap (8) to prevent it from sliding up and down on the outer wall of the outrigger tube (3).

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