| 摘要 |
A chair control device for a tiltable chair wherein the chair control includ es a one-piece integral structure mainframe housing for supporting adjustment mechanisms. The housing is affixed to the underside of a seat portion of a chair and, optionally, a tailpiece bracket to affix the mainframe to a back portion of the chair. Als o included in the device is a tension control means to control the resistance of the tilt motion, the tension control includes an elongated bolt having a first end attached to th e mainframe and a second end attached to an adjustment means. A compression spring is inserted on the shaft of the bolt between the adjustment means and the mainframe. The tension control means is adapted to control the tension of the compression spring. A seat locking cam to control the amount of tilt in a specific range by locking of the seat , includes a clutch means to control the tilt function to lock the tilt into position and an adjustment means affixed to the locking cam clutch and a release means for the back portion of the chair including a clutch means to control the position of the back and an adjustment means affixed to the release clutch.
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