JP2002263141A - Armrest structure for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the handleability of a wheelchair by facilitating the setting and detaching operations of an armrest. SOLUTION: In the wheelchair having both sides of a seat part 4 opened, the armrests are supported so as to be sprung up backwards by pivoting the rear lower part of the armrests 9 to both sides of the rear part of the seat part, receiving members 18 are fixed to both side edge front parts of the seat part and the front lower part of the armrests is loosely fit into the receiving member. Lock pins 13 to be projected by the elasticity of a spring 15 and appearing by the operation of a knob 17 are provided on the front lower part of the armrest and tapered guide parts 21 on which the tip parts 16 of the projected lock pins are to be abutted and fixing holes 22 to which the lock pins are to be fitted are provided on the inner wall surface of the receiving member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armrest structure for a wheelchair with improved usability.

[0002]

2. Description of the Related Art In general, a wheelchair is generally constituted by a frame formed by bending a metal pipe, and an armrest is conventionally fixedly provided at a portion standing upright on both sides of a seat from the frame.

[0003]

The fixedly provided armrests hinder the user from moving to a bed by himself, for example. That is, if there is an armrest on both sides, there is no other choice but to move the body forward and get on and off, so that there is a drawback that care is required. In addition, there was a problem that a heavy burden was placed on the caregiver. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and to make it possible to easily attach and detach the armrest of a wheelchair, to facilitate the setting and detaching operation, and to improve the usability.

[0004]

For this purpose, a wheelchair according to the present invention is characterized in that, in a wheelchair having both sides of a seat part opened, the armrest is jumped rearward by pivotally attaching a rear lower part of the armrest to both sides of the rear part of the seat part. A support member is fixedly provided at the front of both side edges of the seat so that the front lower part of the armrest is loosely fitted into the reception member, and a spring is provided at the front lower part of the armrest. A lock pin that protrudes due to elasticity and protrudes and retracts by a knob operation is provided, and a tapered surface-shaped guide portion with which the tip of the lock pin protrudes from the inner wall surface of the receiving member abuts and a lock hole for fitting the lock pin is formed. It is characterized by becoming.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the entire wheelchair, and FIGS. 2 and 3 show details of the armrests along a line AA and a line BB in FIG. 1, respectively. In this wheelchair, a wheel 2 is pivotally supported at a rear portion of a frame 1 made of a metal square pipe, a free wheel 3 is provided at a front portion, and a seat portion 4 and a backrest portion 5 are provided on the frame. Reference numeral 6 denotes a handle provided at the rear upper portion of the frame 1, reference numeral 7 denotes a footrest plate extending at the front of the frame 1, and reference numeral 8 denotes a brake. The wheel 2 is formed to have a relatively small diameter so as not to protrude to both sides of the seat 4.

Reference numeral 9 denotes an armrest formed by bending a metal round pipe into a substantially U-shape and fixing a square rod-shaped supplementary member 10 to the upper side thereof.
The armrest is pivotally attached to the support shaft at a rear lower portion of the armrest, thereby supporting the armrest so as to be able to jump up rearward. Further, as shown in FIGS. 2 and 3, a tubular portion 1 is provided at a lower front portion of the armrest.
2, a lock pin 13 is slidably received in the tubular portion in the front-rear direction, and a compression spring 15 is engaged with a flange 14 formed on the lock pin. The distal end 16 of the lock pin 13 is urged so as to protrude from the rear end wall of the cylindrical portion, and the lock pin 13
Is provided with a spherical knob 17 at its front protruding end.

Reference numeral 18 denotes a box-shaped receiving member 18 made of plastic and formed in a box shape having an open upper surface and a front surface. The receiving member is fixed to a front portion of both sides of the seat portion 4 by welding, and is fixed on the receiving member. Is fixed by screws 20. Then, a guide portion 21 whose inner surface expands in the shape of a tapered surface toward the upper side is formed on the rear side wall of the receiving member, and a stop hole 22 is opened at a lower end of the guide portion.
The leading end 16 of the lock pin 13 can be brought into contact with the guide portion 21.

For this reason, when the armrest 9 is lowered, the distal end portion 16 comes into contact with the guide portion 21 and is pressed by the tapered surface thereof to slide the lock pin 13 forward against the elasticity of the spring 15. When the tip portion 16 matches the stop hole 22, the elasticity of the spring 15 causes the lock pin 13 to move into the stop hole 2.
2 and the armrests 9 are fixed to both sides of the seat 4 as shown in FIGS.

Further, if the knob 17 is pulled and the tip 16 of the lock pin 13 is pulled out of the stop hole 22 against the elasticity of the spring 15, and the armrest 9 is lifted in this state,
The armrest 9 is flipped up as shown in FIG. By opening both sides of the seat 4 in this way, getting on and off the bed becomes easy, and the caregiver's labor is reduced.

Then, only by lowering the armrest 9, the lock pin 13 naturally fits into the stop hole 22, and the armrest 9 is set at a fixed position, so that the armrest 9 can be prevented from unnecessarily jumping up.

[0011]

As described above, in the armchair structure of a wheelchair according to the present invention, in a wheelchair in which both sides of the seat are opened, the armrest is rearwardly pivoted by pivotally attaching the lower rear portion of the armrest to both sides of the rear of the seat. A support member is fixed to the front of both side edges of the seat so that the front lower part of the armrest can be loosely fitted in the reception member, and a spring is provided on the front lower part of the armrest. A lock pin that projects by the elasticity of the lock pin and protrudes and retracts by a knob operation is provided. Since the armchair is opened, setting and detaching operations of the armrest are facilitated, and there is an effect that the usability of the wheelchair is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wheelchair according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an operation state diagram of the armrest of FIG. 2;

FIG. 5 is an operation state diagram of the armrest of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Wheel 3 Free wheel 4 Seat part 5 Backrest part 9 Armrest 11 Support shaft 12 Cylindrical part 13 Lock pin 15 Spring 16 Tip part 17 Knob 18 Receiving member 21 Guide part 22 Stop hole

Claims (1)

[Claims] 1. A wheelchair in which both sides of a seat are open, a rear lower portion of an armrest is pivotally mounted on both sides of a rear portion of the seat to support the armrest so that the armrest can be flipped rearward, and both side edges of the seat are provided. A receiving member is fixed to the front part, and the lower front part of the armrest is loosely fitted in the receiving member, and a lock pin protruding by elasticity of the spring and protruding and retracting by the knob operation is provided on the lower front part of the armrest. An armrest structure for a wheelchair, wherein a tapered guide portion with which a tip of a lock pin protruding from an inner wall surface of the receiving member abuts and a lock hole for fitting the lock pin are opened. .