| 摘要 |
PURPOSE: A chain-less bicycle is provided to simplify the structure of a power transfer device by employing a crank arm connecting a pedal shaft to a rear wheel shaft. CONSTITUTION: A chain-less bicycle comprises a front wheel unit(2), a rear wheel unit(3), a handle unit(4), and a pedal unit(5). A front wheel(100) is mounted on the front wheel unit. The front wheel unit is formed in front of a frame(F). A rear wheel(200) is mounted on the rear wheel unit. The rear wheel unit is formed behind the frame. The handle is formed on the upper front of the frame. The pedal unit comprises a pedal(51) and is formed on the lower part of the frame. The pedal unit and the rear wheel unit are connected by a crank arm(6) with a given length. The rear wheel rotates by the rotation of the crank arm corresponding to the rotation of the pedal. |
