| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive device in which size reduction is realized by utilizing an ultrasonic motor, operation at a drive inoperable time such as at emergencies, at a fault or a power interruption time or the like is assured and the operation is assured in cold regions. <P>SOLUTION: The drive device comprises the ultrasonic motor, a clutch mechanism and a pulley or a shaft integrated therewith. <P>COPYRIGHT: (C)2003,JPO |
