| 摘要 |
The chair control includes a seat support rotatably mounted on a housing, and a hollow spindle connected to the housing and depending downwardly therefrom. A torsion rod is mounted vertically within the spindle and has one end fixed against rotation at the bottom of the spindle. The seat support is connected for simultaneous rotation with an axle, which is rotatably mounted in the housing. A cam lever is secured to and extends downwardly from the axle and engages a follower lever which is operably connected to the free end of the torsion rod. A ball bearing is positioned between the abutting portions of the cam lever and follower lever to minimize friction. |
