JPS59141Y2 - Zafuton - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a cushion made of sponge.

A cushion made of a sponge board with uneven surfaces all over its surface can most effectively distribute weight and reduce pressure on bony prominences, and can completely prevent bedsores. Therefore, it is used as a cushion for people in wheelchairs.

The present invention is an improvement to such a cushion so that it can be used more comfortably.

In other words, the cushion has uneven surfaces that distribute the weight and create a pumping effect, so when you sit on it, the part that carries the weight of your body slips a little, and the buttocks in that part of the seat slips, causing some discomfort when you sit on it. there were.

Therefore, this invention is an attempt to eliminate the above-mentioned defects, and its gist is that the surface should be
The sponge cushion body has a deep trough of 20 mm and a shallow trough of 20 mm in the diagonal direction, and has a long pitch in the front, rear, left, and right directions, and a large number of irregularities with a short pitch in the diagonal direction.The sponge cushion body has a thin plate-like surface with irregularities. The present invention relates to a cushion made of sponge on which stabilizers are placed and these are covered with a breathable covering material.

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, A indicates a sponge cushion body, and this sponge cushion body A has a standard specific gravity of 0.03 and a thickness of 60 mm. The surface is 35 mm in the front, back, left and right directions.
It is molded into a large number of concavities and convexities with a deep trough A and a shallow trough opening with a diagonal direction of 20 mm, and a pitch of approximately 5 Q mm in the front, rear, left, and right directions, and a pitch of approximately 40 mm in the diagonal direction. The main body of this cushion is a three-dimensional urethane produced by mixing isocyanate (1, (T, D, I,) lylene, isocyanate) and polyol (polyester or polyether) with water and a catalyst at a certain ratio. It is a plastic foam formed by a parallel reaction between the feed and the foaming of carbon dioxide gas generated by the reaction between isocyanate and water (Figure 3).

In the figure, B indicates a sponge stabilizer. This stabilizer B is made of the same plastic foam as the cushion body A, has a thickness of 25 mm, and has a surface that extends approximately 1 inch in the front, back, left and right directions.
A deep valley of 5mm, a shallow valley of about 8mm in the diagonal direction, and a pitch of about 28mm in the front, back, left and right directions.
In addition, a large number of concave and convex portions are provided with a diagonal pitch of approximately 20 mm.

The wrapped material shown at C in the figure is a breathable and stretchable fabric or mesh fabric such as knitted fabric, and covers the cushion main body A and the stabilizer plate B.

Therefore, the cushion of the present invention has an uneven upper surface of the sponge cushion body, which is formed by forming the surface, that is, the upper surface, into an uneven upper surface with deep valleys in the front, rear, left, and right directions and shallow valleys in the diagonal direction. A thin plate-shaped sponge stabilizer plate whose surface, that is, the upper surface, is formed into concavo-convex shapes is placed, and these are covered with a breathable covering material, so that when a person sits on the cushion,
The load is spread over two stages by the upper stabilizer plate and the lower cushion body, so it is not concentrated in one place, and the load is supported at a point on the convex part of the top surface of the stabilizer plate, so it is distributed and reaches the cushion body. This cushion body is supported and dispersed again by the convex part on the upper surface of the cushion body, which makes the above-mentioned diffusion effect even better, and it can be used comfortably without feeling pressured on the buttocks, and there is no need to worry about putting it on the floor. This has the effect of completely preventing bed sores, and further making it possible to reduce the thickness of the cushion itself.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway perspective view, Fig. 2 is a vertical sectional view taken along line X-X, and Fig. 3 is an enlarged view of a part of the cushion body. The perspective view shown in FIG. 4 is a sectional view showing the state of use. In the figure, A indicates the cushion body, B indicates the stabilizing plate, and C indicates the covering material.

Claims (1)

[Scope of utility model registration request] The sponge cushion body has a surface with deep valleys of 35 mm in the front, rear, left and right directions and shallow valleys of 20 mm in the diagonal direction, and has a large number of irregularities formed with long pitches in the front, rear, left and right directions and short pitches in the diagonal direction. This cushion is made by placing a thin plate-shaped sponge stabilizer plate with an uneven surface and covering it with a breathable covering material.