| 摘要 |
A seat support mechanism (10) for a tiltable chair comprises a rear tilt torque mechanism (28) including interconnected torsion bars (30,38) which are adjustable by rotating a knob (52) to vary the resilient restraining force which opposes rearward tilt of the seat when occupied. A detent mechanism (74) is secured within a recess (72) provided in the base member (60) of the mechanism to provide additional detent and stability to maintain the seat in its normal upright position and add to the resistance of the torque mechanism. An adjustment mechanism (162) is provided for adjusting said detent mechanism (74) for front tilt. |
