| 摘要 |
The adjustable seat assembly comprises a seat, backrest, and headrest. At least one guide with a slope supported for movement along a path is provided. A seat is operatively connected to the slope and supported to permit movement of the seat along the slope without movement along the path of the guide. The backrest has at least a first pivot operatively connecting the backrest to the seat as well as a threaded member axially supported for rotation and operatively connected to the backrest so as to permit movement of the backrest by rotation of the threaded member. A second pivot operatively connects the threaded member to the backrest. Moreover, a headrest is operatively connected to the backrest. Another threaded member is axially supported for rotation and operatively connected to the headrest so as to permit movement of the headrest by rotation of the second threaded member. Finally, a frame is slidably connected to the seat
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