JP-7857002-B2 - cushion

JP7857002B2JP 7857002 B2JP7857002 B2JP 7857002B2JP-7857002-B2

Inventors

西川康行
安川淳
志村洋二
茂木秀暁
池田奨
青木真理

Assignees

西川株式会社

Dates

Publication Date: 20260512
Application Date: 20220208
Priority Date: 20211006

Claims (4)

A cushion made of flexible material, The seating area comprises a buttock support section on which the user's buttocks rest, and a pair of thigh support sections on which each of the user's thighs rests. Each of the thigh support portions has a recess that is recessed in the thickness direction of the cushion, The depth of the recess increases as it moves away from the buttock support portion. The seating portion has an inclined surface that extends diagonally upward from the buttock support portion toward the thigh support portion. The aforementioned thigh support portion is, The top portion located at the front end of the inclined surface and the front end of the cushion, An inclined portion extending rearward and diagonally downward from the top towards the lower surface of the cushion, including, cushion.
The thickness of the thigh support portion when the user is seated on the seat is thinner than the thickness of the portion of the seat other than the thigh support portion when the user is seated on the seat. The cushion according to claim 1.
The amount of deformation of the thigh support portion when the user sits on the seat portion is greater than the amount of deformation of the portion of the seat portion other than the thigh support portion when the user sits on the seat portion. The cushion according to claim 1 or 2.
The recess is formed on the lower surface of the cushion, The cushion according to any one of claims 1 to 3.

Description

This disclosure relates to a cushion on which the user's buttocks and thighs rest. Various types of cushions for which the user's buttocks and thighs rest have been known for some time. Japanese Patent Publication No. 2014-12130 describes a chair cushion. The chair cushion comprises a cushion body and a cover. The cushion body includes a seat portion that contacts the seated person's buttocks and a back portion that contacts the seated person's back. In a side view, the two areas corresponding to the ischial tuberosities on the seat portion have a concave surface shape. Japanese Patent Publication No. 2014-12130 This is a perspective view showing a cushion according to an embodiment.This is a plan view showing a cushion according to an embodiment.This is a cross-sectional view taken along line A-A in Figure 2.This is a front view showing a cushion according to an embodiment.This is a cross-sectional view taken along line B-B in Figure 2.This is a schematic diagram showing the spine and pelvis of the human body.(a) is a schematic diagram showing the pelvis of the body. (b) is a schematic diagram showing the spine and pelvis of the body.(a) is a graph showing the position of the user's ischial tuberosities in a plan view. (b) is a graph showing the height position of the user's sacrum.This is a side view showing a cushion according to the first modified example.(a) is a front view of the seating portion of the cushion according to the first modified example. (b) is a plan view of the lumbar support portion of the cushion according to the first modified example.This is a plan view of the seating area according to the first modified example.(a) is a perspective view showing the cushion according to the second modified example. (b) is a perspective view showing the cushion according to the third modified example.This is a perspective view showing the cushion according to the fourth modified example.This is a plan view showing a cushion according to the fourth modified example.This is a cross-sectional view taken along the line C-C in Figure 14.This is a front view showing a cushion according to the fourth modified example.This is a cross-sectional view taken along line D-D in Figure 14.This is a bottom view showing the cushion according to the fourth modified example.This is a perspective view showing the cushion according to the fifth modified example.This is a plan view showing a cushion according to the fifth modified example.This is a bottom view showing a cushion according to the fifth modified example.This is a front view showing a cushion according to the fifth modified example.This is a cross-sectional view taken along line E-E in Figure 20.This is an experimental result (measured data) showing the pressure distribution for a comparative example, which is an example of a user sitting on a chair without a cushion.(a) is experimental results (measured data) showing the pressure distribution at the seating area and sacral support area when a user sits on the cushion according to Example 1. (b) is experimental results (measured data) showing the pressure distribution at the seating area and sacral support area when a user sits on the cushion according to Example 2.(a) is experimental results (measured data) showing the pressure distribution at the thigh support area when a user sits in a forward-leaning posture on the cushion according to Example 3. (b) is experimental results (measured data) showing the pressure distribution at the thigh support area when a user sits in a forward-leaning posture on the cushion according to Example 4. The following describes embodiments of the cushion according to this disclosure with reference to the drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. Furthermore, for the sake of ease of understanding, some parts of the drawings may be simplified or exaggerated, and dimensional ratios, etc., are not limited to those shown in the drawings. The cushion relating to this disclosure is made of a flexible material. "Flexible material" refers to a cushioning material that deforms when a body is placed on it and subjected to a load. The cushion comprises a seating section having a buttock support section on which the user's buttocks rest, and a thigh support section on which the user's thighs rest. "User" refers to the person using the cushion, for example, the person sitting on the cushion. "Buttocks" refers to the rounded lower back portion of the body, located below the waist and above the thighs. "Thighs" refers to the thigh portion from the hip to the knee. "Sitting" refers to sitting on the cushion. The "seating area" refers to the part of the cushion that the buttocks and thighs contact when sitting. The buttock support area has a pair of ischial support areas. "Ischial bones" refers to the lowest part of the pelvis when the user is seated on the cushi