| 摘要 |
A seat backrest having an adjustable lumbar support is provided wherein the cam surface of a rotatable cam of a regulating mechanism, which adjusts the lumbar support, is effectively utilized to facilitate manual adjustment of the lumbar support. Rotation of the cam in a first direction cams a follower away from the axis of rotation of the cam. The follower causes an attached bar to rotate therewith. A lumbar support plate is supported by a cantilevered resilient or rigid element in the form of a leaf spring which is supported by the bar. |
