| 摘要 |
A chair comprises a seat portion and a support leg including a fluid pressure cylinder. The cylinder has vertically extending telescopic upper and lower sections which are movable between a closed position and an open position. The cylinder also has a valve release member to which an actuator is operatively connected. The valve release member is movable between a first position in which the valve release member is in a closed position and a second position in which the valve release member is in a open position. The actuator has an arm member pivotally mounted on a pivot with respect to the valve. An actuating button, which is positioned proximate the seat portion, is movable between a first position and a second position. A flexible cable having a first end is connected to the button and a second end is operatively connected to the arm member, the ratio of the distance between the pivot and the portion of the arm member to which the cable is affixed to the distance between the pivot member and the valve release member is sufficient to permit the button to be moved from the first position to the second position by the force applied through a finger of the user when the user is seated in the chair.
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