| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bicycle drive unit including both a transmission mechanism and a motor for assist traveling, of which weight reduction and compactification are achieved. <P>SOLUTION: The bicycle drive unit includes a motor having a hole in which a crank axle can be arranged, a transmission mechanism allowing the selection of a plurality of gear ratios and an output portion for combining an output of the transmission mechanism with an output of the motor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
