| 摘要 |
PURPOSE:To make operatability ever so better as well as to simplify a device in structure, by attaching a cam surface forming plural stopper parts to a thigh support arm, and also installing a slide possessing a collar shiftably to a cushion frame. CONSTITUTION:A slider 8 slides in a horizontal direction in follow to operation of a control lever 9, and with this slide, a collar 11 rollingly comes into contact with a cam surface of a cam 7 of a sysupport arm 3. And, a stopper part 7b and the collar 11 both formed so as to be different in each level are engaged with each other, thus level control for the thigh support arm 3 takes place. And, the slider 8 is attached to a cushion frame 1.
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