| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve supporting performance of a cushion material. <P>SOLUTION: The back surface side of a cushion material 4P which is different from a seating side is covered with a backing material 50 having less expandability than the cushion material 4P. The back surface side of the cushion material 4P is divided by a pair of support members 11 into a center portion 20 arranged between the pair of support members 11 and a pair of side portions 30 arranged on both sides of the center portion 20. The center portion 20 and the side portions 30 each have a semi-cylindrical outer shape protruding from the back surface side of the cushion material, and an arranging portion 41 recessed toward the seating side is formed of the outer shape part of the center portion 20 and the outer shape parts of the respective side portions 30, so that the support members 11 are arranged in a sinking shape. <P>COPYRIGHT: (C)2013,JPO&INPIT |
