| 摘要 |
A height adjusting mechanism for a swivel chair prevents a tightening phenomenon and involuntary adjustment of the position. The mechanism includes a supporting pillar pipe and a cylinder pipe coupled so that they can freely extend and contract relative to each other. A clutch unit is provided for connecting and disconnecting a height adjusting power transmission. The clutch unit includes a nut clutch and a clutch plate coupled or released to one another and a chamber of predetermined width is defined within the nut clutch. In the chamber, a rubber O-ring is provided for holding the nut clutch.
|
