| 摘要 |
speed change mechanism includes a rotating shaft (22), a pedal (20) connected fixedly to the rotating shaft, (22), a clutch unit (23), a speed-change gear unit (25), and a rotation delay unit (221). When the pedal (20) is actuated, the rotating shaft (22) rotates so as to activate the clutch unit (23) and the speed-change unit (25). The rotation delay unit (221) interconnects the rotating shaft (22) and the speed-change gear unit (25) so as the speed-change gear unit (25) is activated after activation of the clutch unit (23). |
