| 摘要 |
PROBLEM TO BE SOLVED: To provide the labor saving bicycle with bent crank, in which, in stepping on the pedals thereof, the strength of the legs reinforced by the crank rotates the axis and is transmitted to the wheels, which makes people in climbing up or running for a long distance, and those with weak strength of the legs including aged, disabled, sick or injured people less in the normal running less fatigued, and also contributes to energy conservation when installed on an electrically assisted bicycle. SOLUTION: A left crank 1 of this bicycle with upper and lower surfaces thereof bent at an angle with high rotation efficiency, and a right crank 2 with upper and lower surfaces thereof bent at the reverse angle with high rotation efficiency are symmetrically installed on an axis 3. In stepping down pedals 4 mounted to the both cranks, the strength of the leg reinforced by the crank rotates the axis, and then is transmitted to the wheels. Accordingly, this labor saving bicycle with bent crank can run with conserved labor. |
