| 摘要 |
PROBLEM TO BE SOLVED: To provide a bicycle having shortened overall length by reducing an interval wheel base between a front wheel and a rear wheel. SOLUTION: Crank axles incorporating crank gears are installed on both right and left sides in forward positions from the center of a rear wheel tire of the bicycle. The crank gears serving as a rotating power part are connected with rear wheel gears directly or by using short chains, and rotating power is transmitted to the rear wheel via rear wheel hubs to which free wheels are incorporated or applied. This structure can reduce the interval wheel base between the front wheel and rear wheel and shorten the overall length of the bicycle. COPYRIGHT: (C)2009,JPO&INPIT |
