JP4476429B2 - Wheelchair for disabled people - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelchair that is characterized by a footrest (footrest) and that allows a physically disabled person to get on and off easily.
[0002]
[Prior art]
FIG. 4 shows a specific example of a conventional wheelchair. Large wheels (A) and (A) are provided on both sides, and a frame (B) is supported by these large wheels (A) and (A). ing. The frame (b) has a seating section (c) and can be seated on this part, and handles (d) and (d) extend behind the frame (b). ), (D) can be held and pushed. Of course, auxiliary wheels (e) and (e) are coaxially attached to the outside of the large wheels (a) and (a), and hands are placed on the auxiliary wheels (e) and (e). You can move by turning yourself.
[0003]
Small front wheels (f) and (f) are provided in front of the frame, and footrests (g) and (g) are attached to the frame extending further forward from the front wheels (f) and (f). Handicapped persons can sit on the seat (c) and place their feet on these footrests (g) and (g).
[0004]
By the way, the footrests (g) and (g) are positioned horizontally so that it is easy to place their feet on them, but when getting on and off, the space (h) between both footrests (g) and (g) is narrow. The space (h) can be expanded by rotating and standing vertically. FIG. 5 shows a case where the footrests (g) and (g) are rotated and vertically raised, but a leaf spring is attached so that the standing footrests (g) and (g) do not fall down.
[0005]
FIG. 6 shows an AA cross-sectional enlarged view of FIG. 5, and a leaf spring (le) is attached to the shaft hole (nu) into which the shaft (re) fits. The spring force is urged by abutting on (b), and as a result, a frictional force is given to the outer peripheral surface of the shaft. Therefore, the footrest (g) can be stopped at any position via the leaf spring (le) and, of course, does not fall down. However, when getting on and off the wheelchair, it is troublesome to operate the footrests (G) and (G) one by one, but if you get on and off without getting up, there is a risk of getting caught and falling.
[0006]
[Problems to be solved by the invention]
As described above, the footrest mounted on the conventional wheelchair has the above-described problems. The problem to be solved by the present invention is this problem, and provides a wheelchair in which the footrest can automatically rotate and stand up when getting on and off without turning by hand.
[0007]
[Means for solving the problems]
In the wheelchair of the present invention, the footrest is always in a vertically standing state so that the disabled person sits on the seating portion and at the same time the footrest rotates and falls. Therefore, a push-down member is attached to the seating portion. If a person sits down, the push-down member is pushed down, and the footrest is rotated and tilted in conjunction with the movement of the push-down member.
[0008]
A coil spring or a spring spring is attached to the shaft to which the footrest is attached, and the footrest can stand up constantly by the force of this spring. The push-down member can overcome the spring force and rotate and defeat the footrest. By the way, the interlocking device that transmits the movement of the pressing member to the footrest is not particularly limited. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
[0009]
【Example】
FIG. 1 is an embodiment showing a wheelchair according to the present invention. The basic structure is the same as that of the wheelchair shown in FIG. 4, and large wheels 1 and 1 are provided on both sides, and a frame 2 is supported on the large wheels 1 and 1. The frame 2 has a seat portion 3 and can be seated on this portion. Handles 4 and 4 extend behind the frame 2 so that the handles 4 and 4 can be gripped and pushed. Of course, the auxiliary wheels 5 and 5 are coaxially attached to the outside of the large wheels 1 and 1 so that the auxiliary wheels 5 and 5 can be moved by rotating the auxiliary wheels 5 and 5 themselves. ing.
[0010]
Small front wheels 6 and 6 are provided in front of the frame, and footrests 7 and 7 are attached to the frame extending further forward from the front wheels 6 and 6. A physically handicapped person can sit on the seat 3 and put his feet on the footrests 7 and 7. By the way, the footrests 7, 7 shown in the figure are in a collapsed state and are horizontal. In other words, the foot can be put on and is pulled by the wire 9 connected to the shaft portion 8 of the footrest 7.
[0011]
The other end of the wire 9 is fixed to the tip of the arm 10, and the arm 10 is attached to a shaft 11 and can swing. A push-down portion 12 that extends upward is formed at the rear end of the arm. The push-down portion 12 is positioned below the seat portion 3 and is pushed downward by the seat portion 3. A person with a physical disability can sit on the seating portion 3, and the seating portion 3 sinks by sitting on the seating portion 3, and as a result, the push-down portion 12 positioned below the seating portion 3 moves downward. The arm tip end side is raised in reverse by swinging down and swinging about the shaft 11. Therefore, the wire 9 fixed to the arm tip can be pulled, and the footrest 7 can be rotated to fall down horizontally.
[0012]
By the way, if the physically handicapped person raises his / her waist from the seating portion 3, the force that pushes down the push-down portion 12 is removed, and therefore the push-down portion 12 is attached so that the push-down portion 12 rises. . The coil spring 13 having both ends connected between the arm tip and the crosspiece 14 formed on the frame 2 always urges the spring force so as to descend the arm tip, and the force to push down the push-down portion 12 is not increased. At the same time, the arm 10 is swung by the spring force of the coil spring 13 and the push-down portion 12 is raised.
[0013]
On the other hand, a spring is attached to the shaft 15 to which the footrest 7 is attached, and a force that rises substantially vertically acts by the spring force of the spring. FIG. 2 shows an axial cross section where the footrest 7 is attached, but the inner end of the mainspring 16 is secured to the shaft 15 and the outer end is secured to the footrest 7 side.
[0014]
A shaft hole into which the shaft 15 of the frame 2 is fitted is formed in the shaft portion 8 of the footrest 7, and an opening portion 18 having an opening in the lower surface 17 is provided in a part of the shaft hole. The mainspring 16 is accommodated in the opening 18 and attached around the shaft 15. FIG. 2 shows a state in which the footrest 7 stands upright. However, if the footrest 7 is pulled by the wire 9 fixed to the shaft portion 8, the footrest 7 rotates and falls horizontally.
[0015]
FIG. 3 illustrates the relationship between the footrest 7 and the arm 10. In FIG. 3A, the footrest 7 stands and the push-down portion 12 formed at the rear end of the arm 10 is raised. That is, the handicapped person is not in a sitting state, and stands up from the seating portion 3 and at the same time is pulled by the coil spring 13 to swing the arm 10 so that the tip side descends. As a result, the tension of the wire 9 is relaxed and the footrest 7 can be raised by the spring force of the spring spring 16.
[0016]
(b) is a case where a physically handicapped person is sitting on the seating part 3, and the push-down part 12 is pushed downward by the action of the weight, and as a result, the tip side of the arm 10 is raised. And tension | tensile_strength acts on the wire 9 and the axial part 8 of the footrest 7 is pulled, and the footrest 7 rotates and falls horizontally. Therefore, the user can sit on the seating portion 3 and at the same time put his feet on the horizontal footrest.
[0017]
The wheelchair of the present invention is characterized by the operation of the footrest, and the structure of the wheelchair body is not particularly limited, and can be applied to a folding wheelchair, and can be an electric wheelchair. The means for transmitting the force acting on the seating portion to the footrest is not limited to the above embodiment, and other means can be used. In the case of an electric wheelchair, it is possible to adopt a structure in which the footrest is rotated by a motor when the weight acts on the seating portion, instead of the link-type interlocking device described in the above embodiment.
[0018]
As described above, the wheelchair of the present invention always keeps the footrest standing, and at the same time sits on the seating portion, the footrest rotates to be horizontal so that the force acting on the seating portion is transmitted to the footrest. The following effects can be obtained.
[0019]
【The invention's effect】
In the wheelchair according to the present invention, the footrest on which the foot is placed is always standing, and can be rotated to be in a horizontal state at the same time as sitting on the seating portion. Also, the footrest can rotate and stand upright at the same time as it stands up from the seat. Therefore, since both footrests stand vertically when getting on and off the wheelchair, the space between them is large, and there is no possibility of falling or injured by hitting the footrest. Of course, it is not necessary to manually rotate the footrest one by one when getting on and off, which is very convenient.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a wheelchair according to the present invention.
FIG. 2 is an axial cross section of a footrest.
FIG. 3 shows the relationship between the footrest and the arm.
FIG. 4 is a conventional wheelchair.
FIG. 5 is a wheelchair when a footrest is raised.
6 is an enlarged cross-sectional view taken along the line AA in FIG.
[Explanation of symbols]
1 Large Wheel 2 Frame 3 Seating Section 4 Handle 5 Auxiliary Wheel 6 Front Wheel 7 Footrest 8 Shaft 9 Wire
10 arms
11 axes
12 Pushing part
13 Coil spring
14 jetty
15 axes
16 Wind-up spring
17 Bottom
18 opening

Claims (1)

  In a wheelchair for a disabled person to ride, a footrest on which a foot is placed in a sitting state is pivotally supported on the axis of the frame, and on both sides of the frame, there are push-down parts that are pushed down by the weight acting on the seating part. The arm formed at the rear end is pivotably attached, and a coil spring that acts on the tensile force is connected to the tip of the arm, and a wire fixed to the shaft portion of the footrest is connected, and a spring is connected to the shaft portion of the footrest. A wheelchair for a physically handicapped person, characterized by being energized by a spring force that always stands up.

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