| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve drive efficiency of a piezoelectric actuator. <P>SOLUTION: A piezoelectric actuator includes at least: a rotor 5 having a rotational axis r; a sliding portion 33 that comes into contact with the rotor 5; a piezoelectric element 30 that excites elliptical vibration in the sliding portion 33; a vibrating plate 31 that is laminated on the piezoelectric element 30; and a moving mechanism that allows a central axis 79 of the sliding portion 33 to be shifted from a state of intersecting with the rotational axis r, according to a rotational direction of the elliptical vibration, in a direction of a plane perpendicular to the rotational axis r. <P>COPYRIGHT: (C)2013,JPO&INPIT |
