| 摘要 |
A piezoelectric motor includes: a piezoelectric actuator; and a driven portion. The piezoelectric actuator includes a piezoelectric element and a vibration member. The piezoelectric element has a piezoelectric layer and a first and a second electrode provided on both surfaces of the piezoelectric layer, respectively, and the vibration member is fixed on the first electrode side of the piezoelectric element. The driven portion which is rotated by the protrusion portion of the vibration member vibrated by the piezoelectric element, while the driven portion being abutted thereon. In the piezoelectric motor, a plurality of grooves which are open at a tip end surface of the protrusion portion and penetrate in a thickness direction are provided on a plurality of points of the protrusion portion along a rotation direction of a rotation shaft of the driven portion. |
