| 摘要 |
PURPOSE: A bicycle is provided to obtain improved propulsion force by adjusting a gap between pedals suitable for physique of a user. CONSTITUTION: A bicycle comprises a front wheel steering unit, a connection frame(210), a main frame(200), a saddle(220), a rear wheel(300), a pair of driven gear parts(320), a pair of driving members(400), a pinion, and an unidirectional rotary electric mechanism of a rear wheel. The front wheel steering unit comprises a front wheel(100), a fork(110), and a handle(120). The connection frame is coupled to the fork to be extended backward. The main frame comprises a driving member passage. The saddle is coupled to the upper part of the main frame. The rear wheel is rotatably coupled to a rear wheel shaft. The driven gear parts are rotatably coupled to the rear wheel shaft. The driving member is slidingly installed inside the driving member passage. The pinion is installed to be rotated around a vertical rotary shaft installed inside the main frame. The unidirectional rotary electric mechanism of a rear wheel is coupled to the driven gear part and the rear wheel. |
