| 摘要 |
PURPOSE: A dual device for unidirectional driving is provided to achieve forward driving of a bicycle in a predetermined direction even when a rider rotates pedals reversely and simplify the structure by alternately disposing angular parts positioned inside forward and reverse gears with a predetermined phase difference, thereby reducing the manufacturing cost and simplifying the assembling procedure. CONSTITUTION: A dual device for unidirectional driving includes a plurality of rollers(57) positioned inside forward and reverse gears(59,52) and respectively formed in the shape of cylinder, and polygonal elements(55a,55b) formed on a main shaft(55) of which number of corners is equal to the number of the rollers, wherein upper angular parts positioned inside the forward gear has a predetermined phase difference with lower angular parts positioned inside the reverse gear and are disposed alternately with the lower angular parts.
|
