An adjustable wheelchair

Abstract

This utility model discloses an adjustable wheelchair, relating to the field of wheelchair technology. It includes a wheelchair body with a base, a buffer component on top of the base, and a seat at the other end of the buffer component. A trapezoidal block is installed at the bottom of the seat, and an adjustment frame is provided at the top of the base. A bidirectional lead screw is rotatably mounted within the adjustment frame, and two nuts are symmetrically threaded onto the bidirectional lead screw. The top of each nut slides through the adjustment frame and has a reinforcing buffer component, which engages with and abuts against the trapezoidal block. By activating the motor, the bidirectional lead screw rotates, causing the two nuts to move the two reinforcing buffer components closer together and directly below the trapezoidal block. When the seat moves downwards, it simultaneously compresses the reinforcing spring, facilitating adjustment and increasing the overall elasticity coefficient of the wheelchair, thereby achieving a cushioning effect for heavier patients while maintaining the same level of comfort.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to an adjustable wheelchair. Background Technology

[0002] With the development of modern society, the use of wheelchairs has greatly facilitated the daily lives of the elderly and disabled. Wheelchairs not only meet the needs of people with mobility difficulties, but more importantly, they facilitate family members to move and care for patients, and enable patients to exercise and participate in social activities with the help of wheelchairs.

[0003] For example, an existing Chinese patent (publication number: CN215385301U) discloses an electric wheelchair with a massage function. This electric wheelchair has a novel design and simple structure. It is easy to buffer the vibrations of the electric wheelchair through the action of the buffer spring, thereby improving the overall shock absorption effect of the electric wheelchair and ensuring the user's comfort when sitting on the seat.

[0004] However, the wheelchair designed above still has some problems in actual use. Although the wheelchair can use the energy absorption properties of the spring to achieve shock absorption and improve the comfort of the patient when being transported in the wheelchair, the impact force on the spring is different for patients of different weights, and the deformation of the spring is also different under different impacts. This makes it impossible for the same spring to support heavier patients, and thus it cannot be used for patients of different weights.

[0005] To address these issues, we designed an adjustable wheelchair. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable wheelchair to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides an adjustable wheelchair, including a wheelchair body with a base, a buffer component on the top of the base, and a seat plate at the other end of the buffer component. A trapezoidal block is installed at the bottom of the seat plate, and an adjustment frame is provided at the top of the base. A bidirectional lead screw is rotatably installed inside the adjustment frame. Two nuts are symmetrically threaded on the bidirectional lead screw. The top of the nuts slides through the adjustment frame and is provided with a reinforcing buffer component. The reinforcing buffer component cooperates with and abuts against the trapezoidal block. A motor is provided on one side of the adjustment frame, and the drive shaft of the motor is connected to one end of the bidirectional lead screw.

[0008] Furthermore, the adjustment frame has an installation cavity and a sliding opening respectively inside and on top. The installation cavity is connected to the sliding opening. The bidirectional lead screw is installed in the installation cavity in a horizontal direction, and the top end of the nut is slidably inserted into the sliding opening.

[0009] Furthermore, a guide rod is fixedly installed inside the mounting cavity. The direction of the guide rod corresponds to that of the bidirectional lead screw. A sliding hole adapted to the guide rod is opened inside the nut. The nut is slidably sleeved on the guide rod through the sliding hole.

[0010] Furthermore, the reinforcing buffer includes a base plate, which is fixedly installed on the top of the nut. A reinforcing spring and a first damping cylinder are provided on the top of the base plate. The reinforcing spring is movably sleeved on the first damping cylinder. A top plate is provided at the other end of the reinforcing spring and the first damping cylinder. The top plate abuts against the bottom of the trapezoidal block.

[0011] Furthermore, the buffer includes two buffer springs, which are symmetrically fixedly installed at the middle of both ends between the base and the seat plate, and a second damping cylinder is also provided between the base and the seat plate.

[0012] Furthermore, there are four second damping cylinders, and the four second damping cylinders are respectively installed at the four corners between the base and the seat plate.

[0013] Furthermore, an anti-pinch plate is fixedly installed on the front side of the seat, and the anti-pinch plate is slidably connected to the front side of the base.

[0014] Furthermore, an elastic pad is provided on the front side of the anti-pinch plate, and the elastic pad is made of rubber.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by turning on the motor, the bidirectional lead screw can be rotated, causing the two nuts to drive the two reinforcing buffers to move closer to each other and be located directly below the trapezoidal block. At this time, when the seat moves downward, the reinforcing spring can be compressed at the same time, which makes it easy to adjust and increase the overall elasticity coefficient of the wheelchair, thereby achieving the effect of cushioning for heavier patients with the same body sensation.

[0016] Compared with the prior art, the beneficial effects of this utility model are: by setting an anti-pinch plate, the patient's legs can be prevented from being pinched when the seat moves downwards, and an elastic pad made of rubber is set on the front side of the anti-pinch plate. Since rubber has good elasticity and soft texture, it can further improve the patient's comfort. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the overall external structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the seat and adjustment frame of this utility model in half-section.

[0019] Figure 3 This is a three-dimensional structural schematic diagram showing a partial internal section of the adjustment frame of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Wheelchair body; 2. Base; 3. Seat; 4. Trapezoidal block; 5. Adjustment frame; 6. Two-way lead screw; 7. Nut; 8. Motor; 9. Mounting cavity; 10. Slide; 11. Guide rod; 12. Base plate; 13. Reinforcing spring; 14. First damping cylinder; 15. Top plate; 16. Buffer spring; 17. Second damping cylinder; 18. Anti-pinch plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: an adjustable wheelchair, including a wheelchair body 1 on which a base 2 is provided, a buffer member on the top of the base 2 and a seat 3 on the other end of the buffer member. A trapezoidal block 4 is installed at the bottom of the seat 3. An adjustment frame 5 is provided at the top of the base 2. A bidirectional lead screw 6 is rotatably provided inside the adjustment frame 5. Two nuts 7 are symmetrically threaded on the bidirectional lead screw 6. The top of the nuts 7 slides through the adjustment frame 5 and is provided with a reinforcing buffer member. The reinforcing buffer member cooperates with and abuts against the trapezoidal block 4. A motor 8 is provided on one side of the adjustment frame 5. The drive shaft of the motor 8 is connected to one end of the bidirectional lead screw 6.

[0024] The adjustment frame 5 has an installation cavity 9 and a sliding opening 10 on its interior and top, respectively. The installation cavity 9 is connected to the sliding opening 10. The bidirectional lead screw 6 is installed in the installation cavity 9 and rotates horizontally. The top of the nut 7 is slidably inserted into the sliding opening 10. The buffer includes two buffer springs 16, which are symmetrically fixedly installed at the middle of both ends between the base 2 and the seat plate 3. A second damping cylinder 17 is also provided between the base 2 and the seat plate 3. The reinforced buffer includes a base plate 12, which is fixedly installed on the top of the nut 7. A reinforcing spring 13 and a first damping cylinder 14 are provided on the top of the base plate 12. The reinforcing spring 13 is movably sleeved on the first damping cylinder 14. A top plate 15 is provided at the other end of the reinforcing spring 13 and the first damping cylinder 14. The top plate 15 abuts against the bottom of the trapezoidal block 4.

[0025] In practice, the person sits on the seat board 3, and then pushes the wheelchair body 1 or the patient turns the wheel hub on the wheelchair body 1 by himself, so that the wheelchair body 1 can move and achieve the effect of replacing his own walking.

[0026] When the wheelchair body 1 carries the patient on a rough road, the person first presses down on the seat 3 due to the bumps, which compresses the buffer spring 16. The buffer spring 16 absorbs the impact force and prevents the vibration from being transmitted back to the patient. Then, with the help of the second damping cylinder 17, the buffer spring 16 can slowly rebound. This process can achieve the buffering effect of the wheelchair body 1, improving the patient's comfort.

[0027] During the above operation, by turning on the motor 8, the drive shaft of the motor 8 can drive the bidirectional lead screw 6 to rotate, so that the two nuts 7 drive the two reinforcing buffers to move closer to each other until the reinforcing buffers are located directly below the trapezoidal block 4. At this time, when the seat 3 moves downward, it can simultaneously compress the reinforcing spring 13, which makes it easy to adjust and increase the overall elasticity coefficient of the wheelchair, thereby achieving the effect of cushioning for heavier patients with the same body sensation.

[0028] See Figure 1-4 A guide rod 11 is fixedly installed inside the mounting cavity 9. The direction of the guide rod 11 corresponds to that of the bidirectional lead screw 6. A sliding hole adapted to the guide rod 11 is opened inside the nut 7. The nut 7 is slidably sleeved on the guide rod 11 through the sliding hole. This allows the nut 7 to slide only along the direction of the guide rod 11, avoiding the problem of movement deviation.

[0029] See Figure 1-4 There are four second damping cylinders 17, which are respectively installed at the four corners between the base 2 and the seat plate 3. This ensures that the four corners of the bottom of the seat plate 3 are subjected to balanced forces, avoids the problem of the seat plate 3 tilting during movement, and improves stability.

[0030] See Figure 1-4 An anti-pinch plate 18 is fixedly installed on the front side of the seat 3, and the anti-pinch plate 18 is slidably connected to the front side of the base 2. By setting the anti-pinch plate 18, the patient's legs can be prevented from being pinched when the seat 3 moves downward, thus improving safety.

[0031] See Figure 1-4 An elastic pad made of rubber is provided on the front side of the anti-pinch plate 18. By providing an elastic pad made of rubber on the front side of the anti-pinch plate 18, the patient's comfort can be further improved due to the good elasticity and soft texture of rubber.

[0032] Before use, all electrical appliances on the wheelchair need to be connected to an external power source, or a battery pack needs to be installed in an area outside the wheelchair body 1 that does not obstruct other components. Then, the battery pack is connected to the electrical appliances through a wire to supply power to the electrical appliances, thereby ensuring their normal operation. Since connecting the electrical appliances to an external power source or setting up a battery pack for power supply is existing technology and is not a problem that needs to be solved in the background technology of this manual, it will not be explained in detail.

[0033] Working principle: When in use, the person sits on the seat 3, and then pushes the wheelchair body 1 or the patient turns the wheel hubs on the wheelchair body 1 to make the wheelchair body 1 move, thus achieving the effect of replacing the person's own walking.

[0034] When the wheelchair body 1 carries the patient on a rough road, the person first presses down on the seat 3 due to the bumps, which compresses the buffer spring 16. The buffer spring 16 absorbs the impact force and prevents the vibration from being transmitted back to the patient. Then, with the help of the second damping cylinder 17, the buffer spring 16 can slowly rebound. This process is repeated so that the wheelchair body 1 can achieve the buffering effect and improve the patient's comfort.

[0035] During the above operation, by turning on the motor 8, the drive shaft of the motor 8 can drive the bidirectional lead screw 6 to rotate, so that the two nuts 7 drive the two reinforcing buffers to move closer to each other along the direction set by the guide rod 11 until the reinforcing buffers are located directly below the trapezoidal block 4. At this time, when the seat 3 moves downward, it can simultaneously compress the reinforcing spring 13, which makes it easy to adjust and increase the overall elasticity coefficient of the wheelchair, thereby achieving the effect of cushioning for heavier patients with the same body sensation.

[0036] By setting up the anti-pinch plate 18, the patient's legs can be prevented from being pinched when the seat plate 3 moves downward. An elastic pad made of rubber is set on the front side of the anti-pinch plate 18. Since rubber has good elasticity and soft texture, it can further improve the patient's comfort.

Claims

1. An adjustable wheelchair, comprising a wheelchair body (1) on which a base (2) is disposed, a buffer member disposed on top of the base (2), and a seat plate (3) disposed at the other end of the buffer member, characterized in that, A trapezoidal block (4) is installed at the bottom of the seat plate (3), and an adjustment frame (5) is provided at the top of the base (2). A two-way lead screw (6) is rotatably installed inside the adjustment frame (5). Two nuts (7) are symmetrically threaded on the two-way lead screw (6). The top of the nuts (7) slides through the adjustment frame (5) and is provided with a reinforcing buffer. The reinforcing buffer cooperates with the trapezoidal block (4) to abut. A motor (8) is provided on one side of the adjustment frame (5), and the drive shaft of the motor (8) is connected to one end of the two-way lead screw (6).

2. An adjustable wheelchair as described in claim 1, characterized in that: The adjustment frame (5) has an installation cavity (9) and a sliding opening (10) on its interior and top, respectively. The installation cavity (9) is connected to the sliding opening (10). The bidirectional lead screw (6) is installed in the installation cavity (9) in a horizontal direction. The top end of the nut (7) is slidably inserted into the sliding opening (10).

3. An adjustable wheelchair as described in claim 2, characterized in that: A guide rod (11) is fixedly installed in the mounting cavity (9). The direction of the guide rod (11) corresponds to that of the bidirectional lead screw (6). A sliding hole adapted to the guide rod (11) is opened in the nut (7). The nut (7) is slidably sleeved on the guide rod (11) through the sliding hole.

4. An adjustable wheelchair as described in claim 1, characterized in that: The reinforcing buffer includes a base plate (12), which is fixedly installed on the top of the nut (7). A reinforcing spring (13) and a first damping cylinder (14) are provided on the top of the base plate (12). The reinforcing spring (13) is movably sleeved on the first damping cylinder (14). A top plate (15) is provided at the other end of the reinforcing spring (13) and the first damping cylinder (14). The top plate (15) abuts against the bottom of the trapezoidal block (4).

5. An adjustable wheelchair as described in claim 1, characterized in that: The buffer includes two buffer springs (16), which are symmetrically fixedly installed at the middle of both ends between the base (2) and the seat plate (3). A second damping cylinder (17) is also provided between the base (2) and the seat plate (3).

6. An adjustable wheelchair as described in claim 5, characterized in that: The number of the second damping cylinders (17) is four, and the four second damping cylinders (17) are respectively installed at the four corners between the base (2) and the seat plate (3).

7. An adjustable wheelchair as described in claim 1, characterized in that: An anti-pinch plate (18) is fixedly installed on the front side of the seat (3), and the anti-pinch plate (18) is slidably connected to the front side of the base (2).

8. An adjustable wheelchair as described in claim 7, characterized in that: An elastic pad is provided on the front side of the anti-pinch plate (18), and the elastic pad is made of rubber.

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