| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate a large torque, and to stabilize the torque. <P>SOLUTION: The ultrasonic motor is provided with a piezoelectric oscillator having a piezoelectric element, a movable body performing relative motion to the piezoelectric element through oscillation of the piezoelectric oscillator, a protrusion provided on the piezoelectric oscillator to touch the movable body, and a balance protrusion on the side face of the piezoelectric oscillator opposite to the side face provided with the protrusion. <P>COPYRIGHT: (C)2007,JPO&INPIT |
