| 摘要 |
A chair-specific adjustment device is provided. The device includes a seat support and a base support linked to a gas column on which there is a rotating user-controlled handle. The handle controls the selection of the adjustment device's angular position as well as a safety limit clutch. The rotation of the handle generates traction of a tensional element that moves a limit switch. The limit switch runs transversely to the seat support and is shaped with steps that selectively interact with a limit appendage linked to the base support. The device includes a torsion bar that elastically limits the movement of the base support. As such, the device provides quick and easy adjustment of the backrest extension into various positions. |
