| 摘要 |
Adjustable headrest (201) for a seat backrest having a mounting system (148, 149) includes frame structure (207) adapted to be secured on the mounting system (148, 149) for up and down movement relative to the seat backrest. Headrest (201) also includes drive means (120, 130) having height adjustment drive system (121-123, 125) for controlling height adjustment of headrest (201) by moving height adjuster section (114), and fore/aft adjustment drive system (131-134) for controlling fore/aft adjustment by moving the fore/aft adjuster section (115). Fore/aft drive system (131-134) has adjustment member or nut (132) constrained to up and down movement, and nut (132) is engaged with adjuster section (115) so as to permit fore/aft movement of adjuster section (115) relative to adjuster section (114) and adjustment nut (132).
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