JP2003000394A - Seat cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat cushion which can reduce concentration of body pressure to the hipbone and disperse body pressure to a flat hip part and thigh parts. SOLUTION: A recess part 2 in which the hipbone is housed in an user's seating condition is equipped on the rear end part of a seat board 1 formed of an elastic material to disperse body pressure to a flat hip part and thigh parts to remove a pain in the hip part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat cushion laid on a seat surface of a wheelchair or the like.

[0002]

2. Description of the Related Art Conventionally, when a person sits on a chair for a long period of time, FIG.
As shown in (1), body pressure is applied to the ischial portion A of the buttocks, which causes pain in the buttocks. In FIG. 3, reference numeral 4 indicates a sheet.

Therefore, while sitting, unconsciously, sometimes the seating position is changed or the waist is lifted to relieve pressure from the ischium to the buttocks and relieve pain.

However, especially in the case of a person with a lower half of the body, he / she often sits in a wheelchair or the like for a long time, and cannot change his / her seating position or lift his / her waist. It was strongly pressed over time, and there was a risk of bed sores due to congestion.

[0005]

Conventionally, in order to reduce the pressure received from the seat surface, a seat cushion formed of an elastic material such as urethane is used, but even if the seat cushion is used, After all, since body pressure is applied to the part of the ischium A of the buttock, the buttock becomes painful.

When body pressure is applied to the sciatic bone A of the buttocks, as shown in FIG. 4, the sciatic bone A is rolled and the body is easily tired.

Therefore, the present invention is intended to provide a seat cushion capable of reducing the concentration of body pressure on the ischial bone and distributing the body pressure to the flat buttocks and thighs.

[0008]

In order to solve the above-mentioned problems, a seat cushion according to the present invention is provided with a recess formed in a rear edge portion of a seat plate made of an elastic material for accommodating an ischium in a seated state. Is provided.

When the seat cushion according to the present invention is laid on the seat surface of a chair, the ischium fits in the recess, and the body pressure is not concentrated on the ischial portion, but the body pressure is dispersed in the flat buttocks or thighs. Because it does, it is hard to hurt the buttocks.

Also, since the ischium fits in the recess, even if one tries to roll around the ischium, the ischium hits the anterior wall of the recess and the occurrence of rolling is suppressed. Less likely to cause pain.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1A and 1B, a seat cushion according to the present invention is seated on a rear edge portion of a seat plate 1 formed of an elastic material such as urethane. A recess 2 for accommodating the ischium A is provided.

As shown in FIG. 2 (A), the recess 2 is formed so that the left and right ischias A are accommodated therein and the thighs are located on the left and right flat portions of the recess 2. Has been done. Further, as shown in FIG. 2 (B), the length of the recess 2 in the front-rear direction is formed such that the forward movement of the ischium A can be suppressed by the front wall of the recess 2.

The seat plate 1 has a four-layer structure of urethane having different hardness. Of the four-layer structure, the second layer from the bottom is divided into two parts, the urethane on the rear side is the hardest material, the hardness on the front side is the next hardness, the first and second layers from the top, the first layer from the bottom. The urethane is made of the softest material. Further, it is preferable that the entire surface of the sheet plate 1 is coated with a film 3 of urethane or the like so as to prevent incontinence and moisture.

[0014]

When the seat cushion according to the present invention is laid on a seat such as a wheelchair and used, the ischium fits into the recess,
Since the body pressure is not concentrated on the ischial bones but is distributed to the flat buttocks and thighs, even if you sit for a long time, your buttocks do not hurt and you can prevent bed sores due to congestion and your body becomes tired. hard. In particular, this seat cushion is very suitable for a person with a lower body who is often in a sitting state for a long time.

[Brief description of drawings]

FIG. 1A is a perspective view of a seat cushion according to the present invention, and FIG. 1B is a central longitudinal side view.

2A is a rear view showing the relationship between the seat cushion and the skeleton according to the present invention, and FIG. 2B is a side view of a central portion.

FIG. 3 is a rear view of a conventional example.

FIG. 4 is a side view of a conventional example.

[Explanation of symbols]

1 sheet board 2 recess 3 film 4 seats

Claims (3)

[Claims] 1. A seat cushion provided with a recess for accommodating an ischium in a seated state at a rear edge portion of a seat plate formed of an elastic material. 2. The seat cushion according to claim 1, wherein the seat plate has a multilayer structure in which urethanes having different hardnesses are combined. 3. The seat cushion according to claim 1, wherein a film coating is applied to a surface of the seat plate.