| 摘要 |
A dual system bicycle for hand and foot propelling operations including a handle device with a front link mechanism operatively installed on top of a front fork member fixed on a front wheel of a bicycle, and a lever device with a rear link mechanism movably connected between the front link and a pedal system installed in a lower portion of a frame structure and in the rear wheel through a chain wheel arrangement of the bicycle; thereby, the rider can use both hands and feet for propelling the bicycle, improving his bodily fitness and increasing the moving speed of the bicycle. Alternatively, the dual system bicycle can be easily changed into an ordinary bicycle mode for foot propulsion only. |
