| 摘要 |
A headrest for use on a motor-vehicle seat back has a base that is secured to the seat back, a head part, and respective base and head guides supporting the head part on the base for displacement in a direction between a rear rest position and a front extended position. A slide is provided between the base and the head part and is movable relative to both the head part and the base on shifting of the head part between the positions. A gear assembly engages both the head part and the base.
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