KR20240033505A - A Wheel Chair with a Structure of Being Operated by a Lever - Google Patents

Abstract

The present invention relates to a wheelchair with a lever operating structure. The wheelchair with a lever-operated structure includes a ratchet block (13) formed at the center of the wheel (11); A fixed pipe (12) connecting the ratchet block (13) and the wheel (11); An operating block (16) connected to the ratchet block (13) and a power transmission means (15); And a moving lever 18 connected to the operating block 15 to induce the operation of the ratchet block 13.

Description

A Wheel Chair with a Structure of Being Operated by a Lever}

The present invention relates to a wheelchair with a lever operating structure.

A wheelchair consists of parts such as a handle for a guardian, a backrest seat, wheels for rotational movement, a hand rim that is coupled to the wheels to rotate the wheels, armrests, and a bottom sheet. In the case of a manual wheelchair, the hand rim must be held and rotated in order to move. Since the hand rim has a similar diameter to the wheel, the wheel rotates at an angle that is directly rotated by hand. As a result, a lot of force is required to operate the wheelchair, which may slow down the movement speed. Therefore, there is a need to efficiently improve the operation of such wheelchairs. Patent Publication No. 10-2018-0028848 discloses a wheelchair equipped with a reverse rotation prevention device. Additionally, Patent Publication No. 10-2022-0059627 discloses a wheelchair in which an auxiliary transport unit is installed. However, prior art or known technology does not disclose technology that can efficiently operate a wheelchair.

The present invention is intended to solve the problems of the prior art and has the following purposes.

Prior art 1: Patent publication number 10-2018-0028848 (Kangwon National University Industry-Academic Cooperation Foundation, published on March 19, 2018) Wheelchair equipped with anti-reverse mechanism Prior Art 2: Patent Publication No. 10-2022-0059627 (Hannam University Industry-Academic Cooperation Foundation, published on May 10, 2022) Wheelchair with auxiliary transport unit installed

The purpose of the present invention is to provide a wheelchair with a lever-operated structure that operates efficiently by applying the ratchet structure and lever principle.

According to a preferred embodiment of the present invention, a wheelchair having a lever operating structure includes a ratchet block formed at the center of a wheel; Fixed pipe connecting ratchet block and wheel; An operating block connected to the ratchet block by a power transmission means; and a moving lever connected to the operating block to induce operation of the ratchet block.

According to another suitable embodiment of the present invention, the moving lever is moved forward and backward, left and right, or up and down to move the wheel forward or backward.

According to another suitable embodiment of the invention, the ratchet block is mounted on a triple leg unit.

According to another suitable embodiment of the present invention, the fixed pipe is adjustable in length.

According to another suitable embodiment of the invention, the ratchet block is operated by a motor.

The wheelchair with a lever-operated structure according to the present invention uses a ratchet structure and a lever principle, making it convenient to operate and enabling movement over long distances with a small amount of force. Additionally, the wheelchair according to the present invention can be applied to wheelchairs with various diameters due to its length-adjustable structure. Optionally, the wheelchair according to the present invention may be operated electrically by applying a driving means such as a motor. The wheelchair according to the present invention can be applied to wheelchairs having various purposes, and the present invention is not limited thereby.

Figure 1 shows an embodiment of a wheelchair with a lever operating structure according to the present invention.
Figure 2 shows an example in which a wheelchair according to the present invention is applied.
Figure 3 shows an embodiment of a triple leg unit for ratchet installation of a wheelchair according to the present invention.
Figure 4 shows an example of a fixed pipe length adjustment structure and a fixing structure forming a wheelchair according to the present invention.
Figure 5 shows another embodiment of a wheelchair according to the present invention.

Below, the present invention will be described in detail with reference to the embodiments shown in the attached drawings, but the examples are for a clear understanding of the present invention and the present invention is not limited thereto. In the description below, components having the same reference numerals in different drawings have similar functions, so unless necessary for understanding the invention, the description will not be repeated, and well-known components will be briefly described or omitted, but the present invention It should not be understood as being excluded from the embodiments.

Figure 1 shows an embodiment of a wheelchair with a lever operating structure according to the present invention.

Referring to Figure 1, a wheelchair with a lever operating structure includes a ratchet block 13 formed at the center of a wheel 11; A fixed pipe (12) connecting the ratchet block (13) and the wheel (11); An operating block (16) connected to the ratchet block (13) and a power transmission means (15); And a moving lever 18 connected to the operating block 15 to induce the operation of the ratchet block 13.

The wheel 11 may have a circular tire shape or a similar shape, and may be maintained in its original shape by the fixing pipe 12. The fixed pipe 12 may have an overall Y shape or a triple leg structure separated from each other at an angle of 120 degrees with respect to the center. Additionally, the fixed pipe 12 may have a structure whose length is adjustable. One end of each of the fixed pipes 12 is located at the center of the wheel 11, and the other end of each of the fixed pipes 12 may be coupled to the wheel 12. The ratchet block 13 may be formed at the center of the wheel 12 or at the center where one end of the fixed pipe 12 gathers, and a circular ratchet unit may be placed on the ratchet block 13. The ratchet block 13 may have a structure that allows the wheel 11 to rotate in one direction but not to rotate in the other direction. For example, the ratchet block 13 allows the wheel to rotate counterclockwise but not clockwise. A ratchet shaft 14 may be coupled to the center of the ratchet block 13, one end of the power transmission means 15 may be connected to the ratchet shaft 14, and the other end of the power transmission means 15 may be operated. It can be connected to block 16. The power transmission means 15 may be, for example, a chain, timing belt, wire, or other similar means capable of transmitting power. The power transmission means 15 transmits the power of the operating block 16 to the ratchet block 13 by moving back and forth or rotating the ratchet block 13, so that the ratchet block 13 can be rotated. The wheel 13 can be rotated by. An operating shaft may be disposed on the operating block 16, and the operating shaft and the ratchet shaft 14 may be connected to each other by a power transmission means 15. The operating shaft may be rotatably disposed on the operating block 16, and the operating shaft may be operated by the moving lever 18. The movement lever 18 may be formed to move forward and backward, to move left and right, or to move up and down. A fixed grip 17 may be disposed on the operating block 16, and the moving lever 18 may be moved forward and backward, left and right, or up and down with respect to the fixed grip 17. The moving lever 18 may be coupled to the fixed grip 17 by an elastic unit 19 such as a spring and be restored to a predetermined position. For example, the moving lever 18 may be moved forward and backward from the reference position, and the moving lever 18 may be moved in the direction of the fixed grip 17 from the reference position. As the moving lever 18 moves, the operating shaft disposed on the operating block 16 rotates, thereby pulling or rotating the power transmission means 15. Accordingly, as the ratchet unit placed on the ratchet block 13 rotates, the wheel 11 rotates forward, allowing the wheelchair to move forward. Afterwards, when the pressure applied to the moving lever 18 is removed, the moving lever 18 returns to the reference position and the power transmission means 15 returns to its original position, thereby rotating the ratchet unit. In this way, when the ratchet unit rotates in the opposite direction, the wheel 11 does not rotate in the opposite direction, so the wheelchair can be moved along the original direction. As the moving lever 18 repeatedly moves between the reference position and the fixed grip 17, the wheel 11 rotates in one direction by the operation of the ratchet block 13, allowing the wheelchair to move forward. You can. In this way, the wheel 11 can be rotated in only one direction by moving the moving lever 18 in the front-back direction, and thus the wheelchair can be moved forward. Optionally, when the movement lever 18 reciprocates in the rearward direction away from the reference position, the wheel 11 may be configured to rotate in the opposite direction. In this case, two ratchet units may be arranged in one ratchet block 13, and the two ratchet units may be arranged in a structure that limits rotation in opposite directions. The movement lever 18 can be pulled upward from the reference position to move the wheelchair rearward. As a result, the ratchet unit connected to the power transmission means 15 can be changed. One ratchet unit and another ratchet unit may have structures that rotate in different directions. When the power transmission means 15 is connected to another ratchet unit, the moving lever 18 can be moved in a direction away from the reference position with respect to the fixed grip 17, and thereby the wheel 11 can be rotated in the opposite direction. there is. Accordingly, the wheelchair can be rotated backwards. Depending on the operating direction of the moving lever 18, the ratchet block 13 or the operating block 16 can be operated according to a predetermined method, for example, the brake function is performed by moving the moving lever 18 downward. It can work. The operating direction and corresponding function of the moving lever 18 can be set in various ways, and the present invention is not limited thereby.

At the bottom of FIG. 1, a ratchet unit disposed inside the ratchet block 13 and a power transmission structure coupled thereto are shown. The ratchet unit became the internal structure, and the power transmission structure was presented as a planar structure. The ratchet unit includes a circular ratchet body (21); Ratchet teeth (22) formed inside the peripheral surface of the ratchet body (21); And a rotating body 24 that is rotatable relative to the ratchet body 21 and has a plurality of locking tabs 23 formed along the circumferential surface. A circular fastening hole 24a may be formed in the center of the rotating body 24, and the ratchet teeth 22 may have an overall triangular shape with an inclined surface or a similar shape. One end of each locking tab 23 is rotatably fixed to the rotating body 24, and the other end of each locking tab 23 is in contact with one end of the ratchet tooth 22 so that the rotating body 24 Allow it to rotate together with the ratchet body (21). Due to this structure of the ratchet unit, the ratchet body 21 and the rotating body 24 rotate when the locking tab 23 is caught by the ratchet teeth 22, but when the rotating body 24 rotates in the opposite direction. The ratchet body 21 does not rotate. One part of the cylindrical ratchet shaft 25 may be coupled to the fastening hole 24a, and an operating shaft 27 having the same or similar structure as the ratchet shaft 25 may be coupled to the operating block 16. there is. The ratchet shaft 25 and the operating shaft 27 may be connected to each other by the power transmission means 15, and the ratchet shaft 25 may be rotated by the power transmission means 15 by rotation of the operating shaft 27. You can. Insertion protrusions 26 and 28 are formed on the ratchet shaft 25 and the operating shaft 27, respectively, so that the power transmission means 15 rotates at a predetermined position along the longitudinal direction of the ratchet shaft 25 and the operating shaft 27. It can be. An insertion protrusion 26 is formed in the middle portion along the longitudinal direction of the ratchet shaft 25, so that the power transmission means 15 can be coupled to the middle portion of the ratchet shaft 25. As described above, when two ratchet units are arranged for rotation of the wheel 11 in one direction or the other, both ends of the ratchet shaft 25 are coupled to the center hole 24a of the other ratchet unit. It can be. The ratchet unit can be made of various structures that allow rotation in one direction but does not rotate in the other direction, and is not limited to the presented embodiment.

Figure 2 shows an example in which a wheelchair according to the present invention is applied.

Referring to Figure 2, the ratchet block 13 may be installed on the triple leg unit 32. The wheel 11 may include a wheel rim 31, and a triple leg unit 32 may be disposed at the center of the wheel 11. The triple leg unit 32 may have an overall Y shape or a structure in which three legs 32 extend from a central portion. A ratchet block 13 may be placed at the center of the triple leg unit 32, and the three legs may be extended to have an angle of 120 degrees to each other. Each of the three legs may be in the shape of a hollow cylinder, and one end of the fixing pipe 12 may be inserted and fixed to each leg. The guidance cylinder 33 may extend from the ratchet block 13, the guidance cylinder 33 may be in the shape of a hollow cylinder, and the power transmission unit 34 may be disposed inside the guidance cylinder 33. there is. The ratchet block 13 may be connected to the operating unit 36a by the power transmission unit 34. The operating unit 36a can be rotated by the moving lever 36, and the moving lever 36 can be moved back and forth relative to the grip 35. And the moving lever 36 can be automatically moved to a predetermined reference position by elastic means. When the moving lever 36 is moved from the reference position in the direction of the grip 36, the operating unit 36a can be rotated, whereby power is transmitted to the ratchet block 13 by the power transmission unit 35. The wheels 11 can be rotated to move the wheelchair forward. The fixed pipe 12 may have an adjustable length structure, and one end of the fixed pipe 12 may be fixed to the wheel rim 31 by a fastening unit 37.

Figure 3 shows an embodiment of a triple leg unit for ratchet installation of a wheelchair according to the present invention.

Referring to Figure 3, the triple leg unit 32 includes a receiving housing 322 coupled to a coupling hole formed in the center; and three legs 321 extending from the coupling hole in the shape of a hollow cylinder while forming an angle of 120 degrees with each other. The ratchet block described above may be accommodated inside the housing 322, and the ratchet shaft 323 may be coupled to the ratchet block to protrude to the outside. As described above, one end of the fixing pipe 12 may be secured to the wheel rim by a fastening unit 37. The fastening unit 37 includes a pair of protective housings 371a and 371b extending to face each other and having an overall half-cylinder shape; Locking units (372a, 372b) for coupling both ends of a pair of protective housings (371a, 371b) to each other; It includes protective pads (373a, 373b) disposed inside the protective housing (371a, 371b) and in contact with the outer surface of the fixed pipe (12). The locking units (372a, 372b) have a structure that allows adjustment of the locking level. may be, and the protective pads 373a and 373b may be made of rubber, elastomer, or similar elastic material. The fixed pipe 12 can be fixed to the wheel rim in various ways and is not limited to the presented embodiment.

Figure 4 shows an example of a fixed pipe length adjustment structure and a fixing structure forming a wheelchair according to the present invention.

Referring to FIG. 4, the fixed pipe may have an adjustable length structure and, for example, may be connected to a triple leg unit so that the length is adjustable. The fixed pipe may be made of first and second pipes 41a and 41b connected to each other so that the length can be adjusted, and the first pipe 41a may be a leg forming a triple leg unit. The second pipe 41b may be inserted into the first pipe 41a, and the first and second pipes 41a may have an overall hollow cylinder shape and surround the outside of the first pipe 41a. is a fixed tab (42); An adjusting tab (43) coupled to the fixing tab (42); And the length can be adjusted by the adjustment ring 44 connecting the front part of the fixing tab 42 and the adjustment tab 43. The first pipe 41a is inserted into one part of the fixing tab 42, and the fixing tab 42 takes the overall shape of an empty cylinder, forming a fixing part with a plurality of slits in the longitudinal direction at the front part. . An adjustment ring 44 may be coupled to the fixed portion, and an adjustment tab 43 having a thread formed along an inner circumferential surface may be connected to the outside of the adjustment ring 44. In this state, the second pipe 41b, which has a fastening portion fastened to a thread on the outer peripheral surface, may be connected to the first pipe 41a via the inside of the adjustment tab 43 and the fixing tab 42. In this structure, the length of the connecting portion of the first and second pipes 41a and 41b can be adjusted by rotating the adjustment tab 43. The first and second pipes 41a and 41b may be connected to each other in various structures and are not limited to the presented embodiment.

Figure 5 shows another embodiment of a wheelchair according to the present invention.

Referring to FIG. 5, the ratchet block 13 may be operated by a motor 51. A ratchet block 13 may be formed at the center of the wheel 11, and the ratchet block 13 may be connected to the operation guide shaft 55b by a power transmission means 15. The operation guidance shaft 55b may be connected to the rotation guidance shaft 55a by the power guidance means 56, and the rotation guidance shaft 55a may be coupled to the reducer 52. The reducer 52 may be operated by the motor 51, and the operation of the motor 51 may be controlled by the controller 53. Operation buttons 541, 542, and 543, such as forward, backward, or brake, may be installed on the operation block 54, and when the operation buttons 541, 542, and 543 are operated, an operation command is transmitted from the controller 53. Motor 51 can be operated. In this structure, the motor 51 and the reducer 52 have the function of the moving lever described above, and the power guidance means 56, the operation guidance shaft 55b and the rotation guidance shaft 55a have the function of the operation block. You can have it. Ratchet block 13 can be operated in a variety of ways and is not limited to the presented embodiment.

Although the present invention has been described in detail above with reference to the presented embodiments, those skilled in the art will be able to make various variations and modifications without departing from the technical spirit of the present invention by referring to the presented embodiments. . The present invention is not limited by such variations and modifications, but is limited by the claims appended below.

11: wheel 12: fixed pipe
13: Ratchet block 15: Power transmission means
16: operating block 18: moving lever
32: triple leg unit 51: motor

Claims (5)

Ratchet block 13 formed at the center of the wheel 11;
A fixed pipe (12) connecting the ratchet block (13) and the wheel (11);
An operating block (16) connected to the ratchet block (13) and a power transmission means (15); and
A wheelchair with a lever operating structure including a moving lever (18) connected to the operating block (15) to induce operation of the ratchet block (13). The wheelchair according to claim 1, wherein the moving lever (18) is moved forward and backward, left and right, or up and down to move the wheel (11) forward or backward. The wheelchair according to claim 1, wherein the ratchet block (13) is installed on the triple leg unit (32). The wheelchair according to claim 1, wherein the fixed pipe (12) has an adjustable length. The wheelchair according to claim 1, wherein the ratchet block (13) is operated by a motor (51).