| 摘要 |
PROBLEM TO BE SOLVED: To fulfill a moderate lumber support function according to the degree of backward tilting of a seated person by facilitating the operation of controlling the vertical position of the lumber support. SOLUTION: In the back frame 10 to which the outer peripheral part of a sheet-like member 11 is fixed, a guide part 15 pointing in the vertical direction is provided in the center of the back frame 10 on the back side of the sheet-like member 11, and a lumber support 12 is provided to slide along the guide part 15. The lumber support 12 is provided with an operation handle 24 for performing the vertical sliding operation. COPYRIGHT: (C)2004,JPO
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