| 摘要 |
An adjustment device to adjust the depth and height of a seat cushion, the longitudinal positions of a headrest and the like in a seat for use in a vehicle such as an automobile is disclosed. In the adjustment device, a rod is rotatably journaled on the side of fixed means thereof, a pair of link members are respectively fixed to the rod at the first ends thereof with the free ends thereof being connected to a movable member, there is provided in said fixed means a crankshaft having a pair of bent portions on the substantially 180 DEG opposing sides thereof, and the bent portions of the crankshaft are respectively inserted through and engaged with slits formed in the two link members, whereby the link members are rotated by rotating the crankshaft so as to be able to move or adjust the movable member relative to the fixed means.
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