| 摘要 |
A new and useful adjustable chair and adjustable height chair arms therefor in which a parallelogram or pantographic mechanism for activation of the height adjustment of the chair arms is located in the back portion of the chair structure and the arms are pivotal on the back. A back support post pivotally supports the back. The support post, then, is extensibly secured to the seat support or frame and the seat is tiltably pivotal on a swivel bracket operating to turn on the vertical axis of a spindle post extending upwardly from the chair base. The seat has an adjustable resilient compression stabilizing spring support forward of the seat tilting pivot and forward of the swivel post axis. The back support is torsionally supported on its pivot connection to the frame in an adjustable manner. Cushion stop means function between the back and the back support post. The arms, flanking the seats carry the operational trigger for remotely actuating the infinite arm adjustment mechanism utilizing a locking source of stored energy and responding sensitively to the control of the user remotely actuating pantographic relationships moving both arms of the chair in selected planes generally parallel to a starting plane at a selected angle to the seat.
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