| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a suspended member driving device of simple structure whose noise can be reduced. <P>SOLUTION: An electric curtain device moves a curtain along support parts 1b, 1c of a curtain rail 1 and is equipped with a running member 2 which is set runnable along the support parts 1a, 1b of the curtain 1, suspends and supports the curtain, is self-propelled along the support parts 1b, 1c by drive force of a drive source (motor) of the device itself. The drive source (motor) is an ultrasonic motor 7 with a stator 11 to generate vibration and a rotor 12 pressed against the stator 11 and rotated based on vibration of the stator 11. <P>COPYRIGHT: (C)2004,JPO |
