| 摘要 |
PURPOSE: A multi-functional bicycle is provided to secure a small size and convenient carriage because the rear wheel axle and the pedal axis are integrated, excluding a drive chain. CONSTITUTION: A multi-functional bicycle comprises a rear wheel frame, a front wheel frame, a link frame, a left disk(L110), a right disk(R110), a drive disk(120), a first axis(210), a second axis(220), a third axis(410), and a fourth axis(420). The rear wheel frame comprises a saddle and a rear wheel axle. The front wheel frame comprises a handle and a front wheel axle. The link frame connects the rear wheel frame and the front wheel frame. The left and the right disk comprise a left side knob and a right side knob(R111), respectively. The drive disk comprises a drive disk gear(121). The first axis comprises a first axis gear(211). The second axis is connected to a shift gear unit and a drive force conversion unit(200). The third and fourth axes are connected to a pedal speed change part(400). The fourth axis comprises a fourth axis gear(424).
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