WO2024005435A1 - Wheelchair frame for correcting rider posture - Google Patents

Abstract

The present invention provides a wheelchair frame for correcting rider posture. A specific configuration thereof comprises a basic frame (11) installed in a lower portion of a wheelchair, a shock absorber (20) being mounted to one side of the basic frame (11) and a cylinder (15) connected to the shock absorber (20) being mounted to the other side of the basic frame (11), wherein the shock absorber (20) has a first cover (21) on the top and a second cover (22) on the bottom. A first bracket (30) and a second bracket (33) are installed in front of the first cover (21) and the second cover (22), wherein: the front of the first cover (21) is rotatably mounted via a first upper hinge portion (31) of the first bracket (30) and a second upper hinge portion (34) of the second bracket (33); the rear of the first cover (21) is rotatably mounted via a third upper hinge portion (41) of a third bracket (40) and a fourth upper hinge portion (44) of a fourth bracket (43); the front of the second cover (22) is rotatably mounted via a first lower hinge portion (32) of the first bracket (30) and a second lower hinge portion (35) of the second bracket (33); and the rear of the second cover (22) is rotatably mounted via a third lower hinge portion (42) of the third bracket (40) and a fourth lower hinge portion (45) of the fourth bracket (43). Also, a coil spring 59 is mounted between the first cover 21 and the second cover 22. Accordingly, the configuration eliminates vibrations due to a road surface in real time, thus allowing the rider to assume a comfortable posture when riding.

Description

Frame for wheelchairs to correct rider posture

The present invention relates to a frame for a wheelchair, and more specifically, when driving along a road surface with height or unevenness or a slope, transmission is transmitted through the curves and slopes of the road surface so that the rider's posture can be comfortably maintained. This is about a frame for a wheelchair to correct the occupant's posture, which can relieve vibration and postural discomfort in real time.

The wheelchair to which the present invention pertains is generally in the shape of a chair equipped with wheels so that people with impaired legs or weak bodies, such as the elderly, can move while seated, and are used by the elderly or disabled to participate in work life, home life, and leisure life. It is a short-distance means of transportation.

When driving along a road surface with frequent elevations or irregularities, or along a sloping road surface, passengers who rely on wheelchairs generally feel a lot of discomfort.

Vibrations transmitted from the curves of the road surface are directly transmitted to passengers with physical disabilities, which not only increases the fatigue level of the rider as the sitting posture becomes distorted, but also when driving along a sloping road surface, it is easy to lean according to the slope, but the body Due to this uncomfortable relationship, it is difficult to interact with leaning along a sloping road surface.

[Prior art literature]

[Patent Document]

1. Republic of Korea Patent Publication No. 10-1458988 (2014. 11. 07)

2. Republic of Korea Patent Publication No. 10-1859404 (May 18, 2018)

Therefore, the present invention was created to solve the above problems, and aims to provide a frame for a wheelchair for correcting the occupant's posture that can eliminate vibration and posture discomfort transmitted from curves and slopes of the road surface in real time.

The specific configuration of the wheelchair frame for correcting the occupant's posture according to the present invention is provided with a basic frame 11 installed at the bottom of the wheelchair, a shock absorber 20 is mounted on one side of the basic frame 11, and the basic frame A cylinder 15 connected to the shock absorber 20 is mounted on the other side of (11), and the shock absorber 20 has a first cover 21 at the top and a second cover 22 at the bottom. It is provided in, and a first bracket 30 and a second bracket 33 are mounted in front of the first cover 21 and the second cover 22, and the front of the first cover 21 is the first bracket. It is rotatably mounted through the first upper hinge part 31 of (30) and the second upper hinge part 34 of the second bracket 33, and the rear of the first cover 21 is attached to the third bracket 40. ) is rotatably mounted through the third upper hinge part 41 of the fourth bracket 43 and the fourth upper hinge part 44 of the fourth bracket 43, and the front of the second cover 22 is of the first bracket 30. It is rotatably mounted through the first lower hinge part 32 and the second lower hinge part 35 of the second bracket 33, and the rear of the second cover 22 is attached to the third lower hinge part 35 of the third bracket 40. It is rotatably mounted through the lower hinge portion 42 and the fourth lower hinge portion 45 of the fourth bracket 43, and a coil spring ( 59) is installed to eliminate vibration from the road surface in real time, thereby creating a comfortable posture when riding.

By using the wheelchair frame for correcting the occupant's posture according to the present invention, not only does it solve the problem of vibration transmitted from the curves of the road surface being transmitted directly to the disabled rider, but also when driving along a sloping road surface, the inclination By activating the body to tilt accordingly, a comfortable posture is maintained regardless of road surface conditions when riding the wheelchair, which has the significant effect of improving the satisfaction of using the wheelchair.

Figures 1 and 2 are perspective views to explain the problems of conventional manual wheelchairs and electric wheelchairs.

3 and 4 are perspective views illustrating the mounting position of the shock absorber in the present invention.

Figures 5 and 6 are detailed perspective views for explaining the structure of the shock absorber of the present invention.

Figure 7 is a side view for explaining the operation of the shock absorber of the present invention.

Figures 8, 9, and 10 are perspective views for explaining the mounting positions of the compensation motor and seat in the present invention.

Figure 11 is a side view for explaining the angle adjustment of the seat frame in the present invention.

<Explanation of symbols for main parts of the drawing>

10: Wheelchair

11: Basic frame

12: Seat frame

13: driving wheel

14: driven wheel

15: cylinder

20: shock absorber

21: first cover

22: second cover

23: Holder

24: Holding hole

25: Mounting stand

30: first bracket

31: first upper hinge portion

32: first lower hinge portion

33: 2nd bracket

34: 2nd upper hinge part

35: 2nd lower hinge part

40: Third bracket

41: Third upper hinge part

42: Third lower hinge portion

43: 4th bracket

44: 4th upper hinge part

45: Fourth lower hinge portion

50: Elevation control device

51: Male thread vertical part

52: transfer block

53: First fastening bolt

54: bearing

55: first mounting block

56: Second mounting block

57: Third mounting block

58: Second fastening bolt

59: Coil spring

60: seat

61: driven gear

62: Left base mounting base

63: Compensation motor

64: driving gear

65: belt

Hereinafter, the technical configuration and effects of a preferred embodiment that can achieve the purpose of the present invention will be described while comparing them with the problems of the prior art, and a detailed description of the known functions or configurations related to the present invention will be provided to summarize the gist of the present invention. If it is nothing more than an incongruent supplementary explanation, the detailed explanation will be omitted.

Figures 1 and 2 are perspective views to explain problems with conventional manual wheelchairs and electric wheelchairs. The wheelchair shown in Figure 1 is a manual wheelchair, and is equipped with a basic frame 11 at the bottom, a seat frame 12 is mounted on the upper part of the basic frame 11, and drive wheels are installed on both rear sides of the basic frame 11. (13) is mounted, and a small driven wheel (14) is mounted on the front of the basic frame (11), so that the rider moves by rolling the driving wheel (13) by hand.

In addition, the wheelchair shown in FIG. 2 is an electric wheelchair, and its overall configuration is similar to the manual wheelchair described above, except that electric drive wheels 13 with electric motors are mounted on both rear sides of the basic frame 11, The only difference is that you operate the controller and drive electrically.

Considering that wheelchairs are a means of short-distance transportation used for work, home, and leisure, and are used by people with physical disabilities, it is important to maintain a comfortable riding posture during the driving process to prevent fatigue from increasing.

In particular, when driving along a road surface with frequent elevations or irregularities, or along a sloping road surface, passengers who rely on wheelchairs feel a lot of discomfort.

Vibrations transmitted from the curves of the road surface are directly transmitted to passengers with disabilities, which not only increases the fatigue level of the rider as the sitting posture becomes distorted, but also when driving along a sloping road surface, it is easy to lean according to the slope, but the body Due to this uncomfortable relationship, it is difficult to interact with leaning along a sloping road surface.

Figures 3 and 4 are perspective views to explain the mounting position of the shock absorber 20 in the present invention. In order to solve the above-described conventional problems, vibration transmitted from curves of the road surface is eliminated in real time to ensure a comfortable posture for the occupants. It is a configuration to maintain it.

As shown in Figure 3, a shock absorber 20 is mounted on one side of the basic frame 11, and a cylinder 15 connected to the shock absorber 20 is mounted on the other side of the basic frame 11, Figure 4 By assembling as follows, the rolling motion transmitted from the curves of the road surface is eliminated in real time by the shock absorber 20.

That is, when the sloshing transmitted from the curvature of the road surface is transmitted to the shock absorber 20, the shock absorber 20 repeatedly lifts and lowers according to the curvature of the road surface as shown by arrow ① shown in FIG. 4, thereby lifting the shock absorber 20 from the road surface. Transmitted vibrations are eliminated in real time, resulting in the rider's gaze remaining unchanged and a comfortable riding posture created.

5 and 6, the shock absorber 20 that relieves vibration transmitted from curves of the road surface in real time will be described in detail. Figures 5 and 6 are detailed perspective views to explain the structure of the shock absorber 20 in the present invention.

As shown in FIG. 5, a first cover 21 is provided at the top, a second cover 22 is provided at the bottom, and a second cover is provided in front of the first cover 21 and the second cover 22. The first bracket (30) and the second bracket (33) are mounted, and the front of the first cover (21) is exposed to the first upper hinge portion (31) of the first bracket (30) and the second bracket (33). It is rotatably mounted through the upper hinge portion 34, and the rear of the first cover 21 is positioned at the third upper hinge portion 41 of the third bracket 40 and the fourth upper hinge portion of the fourth bracket 43. It is mounted to be rotatable through the branch 44.

In addition, the front of the second cover 22 is rotatably mounted through the first lower hinge portion 32 of the first bracket 30 and the second lower hinge portion 35 of the second bracket 33, The rear of the second cover 22 is rotatably mounted through the third lower hinge portion 42 of the third bracket 40 and the fourth lower hinge portion 45 of the fourth bracket 43.

Meanwhile, as shown in Figure 6, a coil spring 59 to absorb vibration is located between the first cover 21 and the second cover 22, and the coil spring 59 is installed so that the tension of the coil spring 59 can be arbitrarily adjusted. At both ends of (59), the first fastening bolt 53 and the second fastening bolt 58 are fastened using a screw method, so that the cushioning degree of the seat preferred by the passenger can be easily adjusted.

That is, the lifting control device 50 is located between the third bracket 40 and the fourth bracket 43 through the first mounting block 55 and the second mounting block 56. (50) has a male threaded vertical portion 51 formed with an external thread standing upright, and a bearing 54 is mounted on the lower part of the male threaded vertical portion 51, and the transfer block 52 mounted on the male threaded vertical portion 51 has a male threaded vertical portion 51. When the vertical part 51 rotates, it is raised and lowered along the male screw vertical part 51.

In addition, the transfer block 52 is equipped with a first fastening bolt 53, fastened to the rear end of the coil spring 59 in a screw manner, and the first fastening bolt 53 is connected to the first bracket 30 and the second bracket 33. A third mounting block 57 is installed between them, and a second fastening bolt 58 is mounted on the third mounting block 57 and is fastened to the front end of the coil spring 59 in a screw manner.

As a result, the passenger can easily adjust the cushioning degree of the preferred seat, and the tension in the longitudinal direction of the coil spring 59 is generated by rotating the second fastening bolt 58 and pulling the coil spring 59. It can be easily adjusted, and the tension according to the mounting position in the vertical direction of the coil spring 59 is adjusted by rotating the external screw vertical part 51 of the lifting control device 50, so that the transfer block 52 is adjusted to the external screw vertical part 51. ) can be easily adjusted by displacing the height of the coil spring (59) while moving up and down.

Meanwhile, a characteristic configuration of the present invention is that the first fastening bolt 53 and the second fastening bolt 58 are screwed to both ends of the coil spring 59 in an assembled manner. In the past, the tension of the coil spring (59) was adjusted by welding washers or donut-shaped parts to both ends of the coil spring (59) and then pulling the welded parts. However, due to the nature of use of the wheelchair, Considering that it is continuously subjected to vibration, there was a problem of performance deterioration due to poor welding due to accumulated fatigue of the welded area due to frequent vibration.

In the present invention, great effort was made to fundamentally exclude the welding method, which inevitably causes fatigue due to frequent vibration, and by properly understanding the configuration of the coil spring 59, the coil spring 59 is used like a female thread to form a coil. By screwing the first fastening bolt 53 and the second fastening bolt 58 to both ends of the spring 59, the problem of fatigue failure due to welding was fundamentally solved.

The operation of the shock absorber 20 will be described once more with reference to FIG. 7 . Figure 7 is a side view for explaining the operation of the shock absorber 20 in the present invention. The shock absorber 20 eliminates the shaking transmitted from the curves of the road surface in real time.

That is, when the wheelchair travels on a road surface with curves or frequent irregularities, the rolling motion transmitted from the road surface is caused by the shock absorber 20 that is raised and lowered in real time according to the curves of the road surface, as indicated by the two-dot chain line in FIG. As a result, the gaze height of the person riding on the seat frame 12 does not move and a comfortable riding posture can be maintained.

For reference, as shown in FIG. 6, a mounting hole 24 is formed on one side of the first bracket 30 and the second bracket 33 to connect the cylinder 15 to the shock absorber 20. (23) is mounted, and a mounting base 25 for mounting the shock absorber 20 to the basic frame 11 is assembled on one side of the third bracket 40 and the fourth bracket 43.

Hereinafter, through FIGS. 7 to 11, a configuration in which the angle of the seat frame 12 can be interactively adjusted according to the inclined road surface will be described so as to provide a comfortable posture to the occupant when driving on a slope.

Figures 8, 9, and 10 are perspective views to explain the mounting positions of the correction motor 63 and the seat 60 in the present invention. As shown in FIG. 8, a seat mounting base 62 is coupled to both sides of the first bracket 30 and the second bracket 33 in the shock absorber 20, and the seat mounting base 62 is attached to the bottom. The seat 60 on which the gear 61 is mounted is rotatably mounted around the central axis of the driven gear 61, and the seat 60 is mounted on the upper part of the seat mounting base 62 as shown in FIG. 9.

In addition, as shown in FIG. 8, a compensation motor 63 equipped with a drive gear 64 is mounted on the front of the basic frame 11, and the drive gear 64 of the compensation motor 63 and the seat 60 are connected to each other. When the driven gear 61 is connected to the belt 65, it is assembled as shown in Figure 9, and when the seat frame 12 is coupled to the seat 60 as shown in Figure 10, the angle of the seat frame 12 is tilted. A configuration that can be automatically adjusted for the convenience of passengers according to the road surface is completed.

Figure 11 is a side view for explaining angle adjustment of the seat frame 12 in the present invention. When the wheelchair travels on a slope, the seat frame 12 is tilted and rotated so that the occupant's posture is tilted to match the slope of the road surface.

That is, a general control PCB (Printed Circuit Board) equipped with a sensor capable of measuring the inclination with the road surface is installed at a certain point of the wheelchair 10, and correction is made according to the signal of the control PCB that detects the inclination of the road surface. When the driving gear 64 of the motor 63 is operated, the rotational force is transmitted to the driven gear 61 of the seat 60 through the belt 65, and as indicated by the two-dot chain line in FIG. 11, the road surface The angle of the seat frame 12 changes in real time according to the inclination, making it possible to create a comfortable riding posture.

As seen above, when the wheelchair frame for correcting the occupant's posture according to the present invention is used, not only does it solve the problem of vibration transmitted from the curves of the road surface being transmitted to the disabled rider, but it also reduces the sloping road surface. By operating the body to tilt according to the incline when driving along the wheelchair, a comfortable posture is maintained regardless of the road surface conditions when riding the wheelchair, which has the significant effect of improving the satisfaction of using the wheelchair.

Claims (4)

A basic frame (11) installed at the bottom of the wheelchair is provided, a shock absorber (20) is mounted on one side of the basic frame (11), and a cylinder connected to the shock absorber (20) is installed on the other side of the basic frame (11). (15) is mounted, and the shock absorber 20 has a first cover 21 at the top, a second cover 22 at the bottom, and the first cover 21 and the second cover ( A first bracket 30 and a second bracket 33 are mounted in front of 22), and the first upper hinge portion 31 and the second bracket of the first bracket 30 are installed in front of the first cover 21. It is rotatably mounted through the second upper hinge part 34 of (33), and the rear of the first cover 21 is connected to the third upper hinge part 41 and the fourth bracket 43 of the third bracket 40. ) is rotatably mounted through the fourth upper hinge portion 44, and the front of the second cover 22 is adjacent to the first lower hinge portion 32 of the first bracket 30 and the second bracket 33. It is rotatably mounted through the second lower hinge portion 35, and the rear of the second cover 22 is connected to the third lower hinge portion 42 of the third bracket 40 and the fourth hinge portion of the fourth bracket 43. It is rotatably mounted through the lower hinge portion 45, and a coil spring 59 is mounted between the first cover 21 and the second cover 22 to eliminate vibration of the road surface in real time, thereby allowing boarding. A frame for a wheelchair to correct the occupant's posture, characterized by creating a comfortable posture. In claim 1, A first fastening bolt 53 and a second fastening bolt 58 are screwed to both ends of the coil spring 59, so that the tension in the longitudinal direction of the coil spring 59 can be arbitrarily adjusted. A frame for wheelchairs to correct the rider's posture. In claim 2, A lift control device 50 is mounted between the third bracket 40 and the fourth bracket 43, and the lift control device 50 has a male screw vertical part 51 installed upright, and a male screw vertical part 51 ) A bearing 54 is mounted on the lower part, and the transfer block 52 mounted on the male screw vertical part 51 is raised and lowered along the male screw vertical part 51 when the male screw vertical part 51 rotates, and the transfer block ( 52) is equipped with the first fastening bolt 53 and is screwed to the rear end of the coil spring 59, so that the tension can be arbitrarily adjusted according to the mounting position in the vertical direction of the coil spring 59. A frame for a wheelchair for correcting the occupant's posture, characterized in that: The method of any one of claims 1 to 3, In the shock absorber 20, a seat mounting base 62 is coupled to both sides of the first bracket 30 and the second bracket 33, and a driven gear 61 is provided at the bottom of the seat mounting base 62. The mounted seat 60 is rotatably mounted, and a seat 60 and a seat frame 12 are mounted on the upper part of the seat mounting base 62, and a driving gear 64 is installed in front of the basic frame 11. A compensation motor 63 is installed, and a belt 65 is connected to the drive gear 64 of the compensation motor 63 and the driven gear 61 of the seat 60, so that the seat is adjusted according to the inclination of the road surface. A frame for a wheelchair for correcting the occupant's posture, characterized in that the angle of the frame (12) is displaced in real time to create a comfortable posture when riding.

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