JP2003325584A - Wheelchair with seat surface changing in shape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheelchair which prevents palsy and ache by performing the shape change of a seat surface of the wheelchair into recession, projection, inclination, high, and low, etc., by changing-over a lever or motor-driven. <P>SOLUTION: A base board is arranged within the seat surface of the wheelchair, and vertically moved with a cam. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a seating surface of a wheelchair.

[0002]

2. Description of the Related Art The most popular wheelchair to date is a folding type that can be stored compactly. Recently, many domestic and foreign products and products are aiming for multi-functionality, such as reclining and electric.

In the folding type, the center portion of the seat surface sags and is dented during use due to its structure, and gravity is apt to concentrate at one point, which is extremely disadvantageous. This is a drawback because the storage advantage is prioritized.

As a voice for wheelchair users, the title of the Tochigi Shimotsuke newspaper article "90% scared of wheelchair users" (200
Requests for these countermeasures were "No. 1 and 12)""I have a pain in my buttocks when I sit for a long time."

Recently, new deluxe products have been introduced to the market one after another, but since the weight of the weight is supported by the contact surface of the buttocks, it is natural that blood circulation is hindered and pain in the buttocks is caused when sitting for a long time. It is impossible to solve the problem only by the shape of the seat surface and the hardness.

[Means for Solving Problems] Even a normal person may happen to be forced to sit in a sitting position, and sometimes it feels painful, but if he or she sits back or changes seats, it immediately becomes easier. The present invention is a means based on these developments.

Numbness and pain are mainly caused by partial fatigue due to long-term compression and blood circulation disorder, so that the present invention was pressed by changing the shape of the seat surface via a lever. The conventional problem is solved by changing the part.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view of the wheelchair of the present invention, FIG. 2 is a side view thereof, and FIG. Figure 4

2. A plan view and a side view of FIG. FIG. 5 is an enlarged detailed view of the cross-sectional side surface of the cam.

In FIG. 1, a cam having an outer ring 6 is inserted into an A shaft 3 and a B shaft 4 which are horizontally and parallelly supported by a bearing 2, a lever 9 is fixed to the shaft end, and a base plate 8 is attached to the cam outer ring. FIG.

When the A-axis and B-axis in the side view of FIG. 2 are arbitrarily rotated, the base plate 8 is pushed up or lowered by the amount of eccentricity (eccentricity) to show the movement of the assumed line in FIG. Fig. 4 is an assembly drawing of the outer ring, the cam, and the shaft, using MC nylon, which is less slippery.

[Effects of the Invention] Since the present invention is constructed as described above, it has the following effects. When the base plate is supported and compressed by the lever operation, the support plate moves down to the peripheral part of the base plate that has not been compressed until now by the operation of the lever. Change the shape of the surface to promote blood circulation,
It has the effect of changing the chair.

[Brief description of drawings]

FIG. 1 is a plan view of the inside of a wheelchair seating surface according to the present invention.

FIG. 2 is a side view of the interlocking operation of FIG.

FIG. 3 is an explanatory diagram along a link operation assumption line.

[Figure 4]

2. FIG. 2 is a plan view of FIG.

FIG. 5 is a cross section of the mechanism of the cam.

FIG. 6 is a side view of a cam structure.

[Explanation of symbols]

1 seat 2 bearings 3 A axis 4 B axis 5 colors 6 Cam outer ring 7 cams 8 base plates 9 lever 10 stopper 11 Sports Rocket 12 chains 13 Base plate fixing screw 14 stop ring 15 Cam fixing screw 16 shows eccentricity

Claims (3)

[Claims] 1. A camshaft having an outer ring is inserted through and fixed to two shafts, an A-axis and a B-axis, which are horizontally supported by bearings in the wheelchair seating surface, and a platform of an arbitrary shape is mounted thereon. Abut the plate
A wheelchair fixed to the outer ring of the shaft cam and covering it. 2. A wheelchair according to claim 1, wherein the reciprocating camshafts are connected by a sprocket and a chain, and the reciprocating base plate is operated by a lever. 3. A wheelchair according to claim 1, wherein the lever operations of "claim 1" and "claim 2" are electrically operated by gears, sprockets and the like.