A standing and lying multifunctional electric wheelchair

Abstract

The present invention relates to a stand-and-lie multifunctional electric wheelchair, comprising a fixed base frame, a backrest frame, and a seat cushion frame. Parallel link assemblies are provided on both sides of the seat cushion frame. One end of the parallel link assembly is hinged to the fixed base frame, and the other end is hinged to one side of a conversion plate to form a parallel four-bar linkage mechanism. The other side of the conversion plate is hinged to the bottom of the backrest frame and an armrest assembly, respectively. The armrest assembly comprises a linkage plate and a connecting rod. One end of the connecting rod is hinged to the linkage plate, and the other end is hinged to the conversion plate. The linkage plate is hinged to the backrest frame. A seat cushion adjustment push rod for controlling the seat cushion frame to stand up is connected between the fixed base frame and the seat cushion frame. A connecting rod is fixedly connected between the two conversion plates. A backrest adjustment push rod for controlling the backrest frame to flip is connected between the connecting rod and the backrest frame. The main purpose of the present invention is to provide a stand-and-lie multifunctional electric wheelchair with a reasonable and reliable structure, flexible use, and convenient operation.

Description

Technical Field

[0001] The present invention relates to a wheelchair, in particular to a standing-lying multifunctional electric wheelchair. Background Art

[0002] As society rapidly develops, accidents are also constantly occurring. Currently, there are approximately 2 million spinal paraplegics in my country. For these patients with difficulty walking, wheelchairs have become an indispensable tool. Currently, electric wheelchairs that can assist patients in standing or lying down have appeared on the market. These wheelchairs not only assist patients with rehabilitation treatment, but also meet their various needs, bringing great convenience to their lives. However, most of these electric wheelchairs are complex in structure, large in size and weight, and difficult to operate, use, and transport. Further improvement is needed. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a standing-lying multifunctional electric wheelchair with a simple and reliable structure, flexible use, convenient and quick operation, and ergonomic design.

[0004] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] The cam is connected to the seat frame by a plurality of levers, and the levers have the plurality of levers connected to the bottom of the seat frame and the plurality of levers have the plurality of levers connected to the bottom of the seat frame.

[0006] Furthermore, the position support close to the other end of the parallel link assembly is placed on a corresponding support platform on the fixed base frame.

[0007] Furthermore, the parallel linkage assembly includes an upper support rod and a lower support rod distributed at intervals in the upper and lower directions, a support frame is fixed on the fixed base frame, one end of the upper support rod and one end of the lower support rod are respectively hinged on the support frame, and the other end of the upper support rod and the other end of the lower support rod are respectively hinged on the conversion plate.

[0008] Furthermore, a cross bar is connected between the two lower support rods, and one end of the seat cushion adjustment push rod is hinged to the fixed base frame, and the other end is hinged to the above-mentioned cross bar.

[0009] Furthermore, the armrest assembly also includes an armrest, one end of which is connected to the linkage plate.

[0010] Furthermore, a driving wheel device is provided at the bottom of the fixed chassis, and the driving wheel device includes a rear driving wheel assembly and a supporting wheel assembly.

[0011] Furthermore, a knee fixing frame is provided on the support wheel assembly.

[0012] Furthermore, a chest fixing belt is provided on the backrest frame.

[0013] Furthermore, the seat cushion adjustment push rod and the backrest adjustment push rod are both electric push rods.

[0014] Compared with the existing technology, the beneficial effects of the present invention are: while meeting the normal use of the user, the present invention also has the function of assisting standing or lying down, and the electric push rod is used to control the lifting or falling of the seat cushion frame and the angle adjustment of the backrest frame, and the operation is flexible and reliable; at the same time, a unique structural design is adopted to ensure that the angle between the backrest frame and the armrest and the ground remains unchanged during the process of assisting the user to stand, without the need for additional adjustment, conforming to ergonomic design, easy to use, highly practical, and with a reasonable and ingenious structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a standing and lying multifunctional electric wheelchair of the present invention;

[0016] Figure 2 A three-dimensional diagram of a standing-lying multifunctional electric wheelchair according to the present invention from another perspective;

[0017] Figure 3 A side view of a standing and lying multifunctional electric wheelchair of the present invention;

[0018] Among them, 1. Fixed base frame; 11. Knee fixing frame; 12. Support frame; 13. Support platform; 2. Backrest frame; 21. Chest fixing belt; 3. Cushion frame; 31. Upper support rod; 32. Lower support rod; 4. Conversion plate; 5. Armrest assembly; 51. Linkage plate; 52. Connecting rod; 53. Armrest; 6. Driving wheel device; 61. Rear driving wheel assembly; 62. Support wheel assembly; 7. Cushion adjustment push rod; 8. Connecting rod; 9. Backrest adjustment push rod. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0021] Example

[0022] like Figure 1 、 Figure 2 and Figure 3 As shown, a multifunctional electric wheelchair for standing and lying down in this embodiment includes a fixed base frame 1, a backrest frame 2, and a seat cushion frame 3. A drive wheel assembly 6 is provided at the bottom of the fixed base frame 1. The drive wheel assembly 6 includes a rear drive wheel assembly 61 and a support wheel assembly 62. The rear drive wheel assembly 61 is used to drive the wheelchair. The specific structures of the rear drive wheel assembly 61 and the support wheel assembly 62 adopt those of the prior art and will not be described in detail here. Parallel link assemblies are provided on either side of the seat cushion frame 3. One end of the parallel link assembly is hinged to the fixed base frame 1, and the other end is hinged to one side of the conversion plate 4, forming a parallelogram linkage. Specifically, the parallel link assembly includes upper support rods 31 and lower support rods 32 spaced apart in an upper and lower direction. A support frame 12 is fixed to the fixed base frame 1. One end of the upper support rod 31 and one end of the lower support rod 32 are respectively hinged to the support frame 12, with the two hinge points spaced a certain distance apart. The other ends of the upper support rod 31 and the other ends of the lower support rod 32 are respectively hinged to the conversion plate 4, with the two hinge points spaced a certain distance apart. With this structure, since the support frame 12 is fixed, the two hinge points thereon are also fixed. When the upper support rod 31 and the lower support rod 32 are rotated to any angle, based on the parallelogram principle, the line connecting the two hinge points on the conversion plate 4 that are hinged to the upper support rod 31 and the lower support rod 32 is always parallel to the line connecting the two hinge points on the support frame 12.

[0023] Meanwhile, in this embodiment, the other side of the conversion plate 4 is hingedly connected to the bottom of the backrest frame 2 and the armrest assembly 5. The armrest assembly 5 includes a linkage plate 51 and a connecting rod 52. One end of the connecting rod 52 is hinged to the linkage plate 51, and the other end is hinged to the conversion plate 4. The linkage plate 51 is also hinged to the backrest frame 2. With this structure, the linkage plate 51, connecting rod 52, conversion plate 4, and backrest frame 2 are hingedly connected to each other to form a parallelogram linkage mechanism. In addition, the armrest assembly 5 also includes an armrest 53, one end of which is fixedly connected to the linkage plate 51.

[0024] In this embodiment, the parallel link assembly, near its other end, rests on a corresponding support platform 13 on the fixed base frame 1. A straight rod is fixedly connected between the upper support rod 31 and the lower support rod 32 at the corresponding position on the support platform 13, providing support and enhancing structural strength. At this point, the seat cushion frame 3 is in a horizontal position, allowing the user to sit comfortably. A seat adjustment push rod 7 is connected between the fixed base frame 1 and the seat cushion frame 3 to control the vertical position of the seat cushion frame 3. Specifically, a crossbar is connected between the two lower support rods 32. The seat adjustment push rod 7 is hinged at one end to the fixed base frame 1 and at the other end to the crossbar. A connecting rod 8 is fixedly connected between the two conversion plates 4. A backrest adjustment push rod 9 is connected between the connecting rod 8 and the backrest frame 2 to control the tilting of the backrest frame 2. Specifically, in this embodiment, both the seat adjustment push rod 7 and the backrest adjustment push rod 9 are electrically operated, providing convenient control and responsiveness. Furthermore, a knee support bracket 11 is provided on the support wheel assembly 62. A chest strap 21 is provided on the backrest frame 2. When the user stands, the user's knees and chest can be assisted and fixed to avoid the user's unstable standing due to weak self-ability. In addition, the backrest frame 2 also reserves an interface for installing objects such as a headrest and a parasol.

[0025] When the wheelchair user needs to stand, the seat adjustment push rod 7 is controlled to move the seat cushion frame 3, which is adjacent to the backrest frame 2, upward, thereby supporting the user to slowly stand up until they reach a standing position. During the upward movement of the seat cushion frame 3, the angle between the conversion plate 4 and the horizontal ground remains unchanged, which in turn maintains the angle between the linkage plate 51 and the horizontal ground, and thus maintains the angle between the backrest frame 2 and the horizontal ground. This allows the user to stand without adjusting the angle of the backrest frame 2. When the user is standing, the bottom end of the support wheel assembly 62 touches the ground, acting as a front support to prevent the user from tipping over when standing or leaning forward.

[0026] When the wheelchair user needs to adjust the angle of the backrest frame 2, they rotate the backrest frame 2 until the user's desired angle is reached by controlling the backrest adjustment push rod 9. During the rotation of the backrest frame 2, according to the parallelogram principle, since the conversion plate 4 remains stationary, the angle between the linkage plate 51 and the horizontal ground remains unchanged. Therefore, the armrest 53 connected to the linkage plate 51 remains in a horizontal position and does not require further adjustment.

[0027] The standing-lying multifunctional electric wheelchair of the present invention not only meets the normal use of the user, but also has the function of assisting standing or lying down. The electric push rod is used to control the lifting or lowering of the seat cushion frame 3 and the angle adjustment of the backrest frame 2, and the operation is flexible and reliable. At the same time, it adopts a unique structural design. In the process of assisting the user to stand, the angle between the backrest frame 2 and the armrest 53 and the ground is always maintained without additional adjustment. It conforms to the ergonomic design, is easy to use, has strong practicality, a reasonable and ingenious structure, and has good market promotion prospects.

[0028] Those skilled in the art can make various other corresponding changes and deformations based on the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the present invention.

Claims

1. A standing and lying multifunctional electric wheelchair, characterized by: The invention comprises a fixed base frame (1), a backrest frame (2) and a seat cushion frame (3), wherein parallel link assemblies are respectively provided on both sides of the seat cushion frame (3), one end of the parallel link assembly is hinged to the fixed base frame (1), and the other end is hinged to one side of a conversion plate (4) to form a parallel four-link mechanism, and the other side of the conversion plate (4) is hinged to the bottom of the backrest frame (2) and an armrest assembly (5), and the armrest assembly (5) comprises a linkage plate (51) and a link (52), one end of the link (52) is hinged to the linkage plate (51), and the other end is hinged to the linkage plate (51). The armrest assembly (5) is hinged to the conversion plate (4), the linkage plate (51) is hinged to the backrest frame (2), the armrest assembly (5) is connected with the conversion plate (4) and the backrest frame (2) to form a parallel four-link mechanism, a seat cushion adjustment push rod (7) for controlling the seat cushion frame (3) to stand up is connected between the fixed base frame (1) and the seat cushion frame (3), a connecting rod (8) is fixedly connected between the two conversion plates (4), and a backrest adjustment push rod (9) for controlling the backrest frame (2) to flip is connected between the connecting rod (8) and the backrest frame (2); The armrest assembly (5) further includes an armrest (53), one end of which is connected to the linkage plate (51); During the process of lifting the cushion frame (3), the angle between the conversion plate (4) and the horizontal ground remains unchanged, thereby making the angle between the linkage plate (51) and the horizontal ground also remain unchanged, thereby making the angle between the backrest frame (2) and the horizontal ground also remain unchanged, thereby achieving standing action without adjusting the angle of the backrest frame (2); According to the parallelogram principle, since the conversion plate (4) is stationary, the angle between the linkage plate (51) and the horizontal ground remains unchanged, so the handrail (53) fixed to the linkage plate (51) is always in a horizontal position and does not need to be adjusted.

2. The standing and lying multifunctional electric wheelchair according to claim 1, characterized in that: The position close to the other end of the parallel link assembly is supported and placed on a corresponding support platform (13) provided on the fixed base frame (1).

3. The standing and lying multifunctional electric wheelchair according to claim 2, characterized in that: The parallel link assembly comprises an upper support rod (31) and a lower support rod (32) which are spaced apart from each other. A support frame (12) is fixed on the fixed base frame (1). One end of the upper support rod (31) and one end of the lower support rod (32) are respectively hinged on the support frame (12). The other end of the upper support rod (31) and the other end of the lower support rod (32) are respectively hinged on the conversion plate (4).

4. The standing and lying multifunctional electric wheelchair according to claim 3, characterized in that: A crossbar is connected between the two lower support rods (32); one end of the seat cushion adjustment push rod (7) is hinged on the fixed base frame (1), and the other end is hinged on the crossbar.

5. The standing and lying multifunctional electric wheelchair according to claim 1, characterized in that: A driving wheel device (6) is provided at the bottom of the fixed chassis (1), and the driving wheel device (6) comprises a rear driving wheel assembly (61) and a supporting wheel assembly (62).

6. The standing and lying multifunctional electric wheelchair according to claim 5, characterized in that: The support wheel assembly (62) is provided with a knee fixing frame (11).

7. The standing and lying multifunctional electric wheelchair according to claim 6, characterized in that: A chest fixing belt (21) is provided on the backrest frame (2).

8. The standing and lying multifunctional electric wheelchair according to claim 1, characterized in that: The seat cushion adjustment push rod (7) and the backrest adjustment push rod (9) are both electric push rods.

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