| 摘要 |
PROBLEM TO BE SOLVED: To provide a chair achieving adjustment function of a projection amount and height position of a lumber support by a simple structure. SOLUTION: The chair has the lumber support 4. A supporting surface S is formed on an outer periphery of the lumber support 4. The lumber support 4 is rotated through a spindle 6 so as to change the projection amount of the surface S projected from the spindle 6. The spindle 6 is formed to move vertically and to form a positioning mechanism A of the lumber support 4 by using the spindle 6 itself. COPYRIGHT: (C)2007,JPO&INPIT
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