To provide a cushion which can effectively prevent pressure sores, and in addition, can improve the posture stabilizing function of a sitting person.
This cushion can softly support around the ischia in the vertical and horizontal directions by each first air cell 10. By making an airbag 21 of the second air cell 20 have an area of three times or more the area of the airbag 11 of each first air cell 10 when viewed from above, even when the rigidity of the second air cell 20 in the vertical direction becomes higher than that of each first air cell 10, there is no problem in aiming at an effective prevention of the generation of pressure sores. The second air cell 20 is fitted in a space between respective ischia, in the lower end surface of the perineal area, and in a space between both thighs, the movement of the buttocks in the width direction of the sitting surface is suppressed by the second air cell 20, and the forward movement of the buttocks is suppressed by a protuberance-like section 41. Therefore, pressure sores can be effectively prevented from occurring, and in addition, the posture stabilizing function of the sitting person can be improved as well.
NIHEI HIDEKI
Yukio Nagauchi
Junichiro Yanagi