| 摘要 |
<p>A variable chair (10) features variable displacement between a back-to-seat pivot or slide pivot interconnection (14) and a back sliding pivot (15), to compensate for occupant weight in tilt moment in a weight responsive action; a particular construction features opposed pairs of intercoupled seat and back crank arm frames (111, 113) mounted upon a carrier or ground frame (114) by which the chair is supported, to achieve a back tilt, seat slide action; with the option of frame flex for restorative action; and with combined back and seat action about a virtual pivot which can approximate to a natural occupant body spine lumbar pivot and associated pivot movement path.</p> |
