| 摘要 |
PURPOSE: A bicycle is provided to improve portability and durability by reducing the size of the bicycle, and to reduce manufacturing cost. CONSTITUTION: A pinion(9) is fixed to one end of a shaft(6) of a rear wheel(5). A gear(11) is fixed to one end of a shaft(10) installed at the front of a floor plate(7), and is connected to the pinion by a chain(11'). A crank(12) is fixed to the other end of the shaft. A lever(14) to which a pedal(13) is fixed is coupled to a bracket(8) fixed to a boss(4) by a pin(15). A hole(16) is formed at the middle part of the lever, and is connected to a crank pin(17) by a link(18).
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