| 摘要 |
A shock absorber including a fixed shaft, an adjustment shaft sleeved onto one end of the fixed shaft, an adjustment knob threaded onto the adjustment shaft, and a shock absorbing coil spring connected between the fixed shaft and the adjustment knob, wherein steel balls are moved in an annular groove on the adjustment knob around the adjustment shaft, and a cap is covered over the steel balls and having an upper Part retained between the inner diameter of the shock absorbing coil spring and the outer diameter of the adjustment shaft for permitting the shock absorbing coil spring to be compressed without being twisted when the adjustment knob is turned upwards.
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