| 摘要 |
PURPOSE:To reduce the size of a piezoelectric motor and to obtain a drive force with high efficiency by contacting a rotary member with a projection projected radially outwardly of an annular vibration members arranged on the outer periphery of a disklike piezoelectric element. CONSTITUTION:A coaxially secured annular vibration transmission member 11 is disposed on the radial outer periphery of a disklike piezoelectric element 12. Elastic projections 14a-14d are projected radially outwardly and formed obliquely relative to a radial direction on the radial outer periphery of the member 11. Further, an annular rotary member 15 which surrounds circumferentially the member 11 and can contact at the radial inner peripheral surface with the projections 14a-14d is provided. The member 15 can be rotated through the projections 14a-14d by radial elongation of the element 12. |
