| 摘要 |
<p>The present invention relates to a driving device to generate rotary force by pressurizing a pedal as a bicycle. More specifically, the driving device is made of: crankshaft fixtures (20, 20′) to contrastively fixate the position of left and right pedal cranks mounted on the frame of a bicycle to be able to rotate at 90 degrees (internal angle 90 degrees, external angle 270 degrees) to deliver the rotary force to a sprocket (30) capable of driving a chain of the bicycle; pedal side variable units (22, 22′) which reciprocates by passing through a shaft in the direction of the crankshaft fixtures (20, 20′) and fixates pedals (16, 16′) to be stepped on by a driver on one end; and track typed sliding crank arms (10, 10′) which guide the linear reciprocating motion of the crankshaft fixtures and the pedal side variable units and are installed on the right and left pedals. According to the driving device of the present invention, a phase difference between the left pedal (16) and the right pedal (16′) is maintained with 90 degrees (internal angle 90 degrees, external angle 270 degrees) and the left and right pedals maintain a distance of 90 degrees while sequentially executing the pedaling without stop in the first time point (Y) & four time point (Z) which is a driving power section of the pedaling. Therefore, driving power can be maximized, faster, and stronger because the toe pedal is cyclically returned with a shortcut track and the rotary pedaling distance becomes shorter.</p> |
