| 摘要 |
A head support for a seat comprises two head support carriers mounted in the backrest of the seat rotatably about their respective axes. The carriers are cranked at their upward ends which are towards the head support member. A respective bar in the form of a rack member is rotatably mounted to the cranked portion of each carrier, the bars being displaceable longitudinally relative to a line connecting the two carriers in respective guide which also entrain the head support member and the guide for the bars being rigidly coupled together. A pinion may mesh with the rack members between the bars for synchronized movement of the mechanism.
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