| 摘要 |
PURPOSE:To obtain a high output by forming the peripheral surface of a vibrator as the contacting surface with a movable element in a motor for driving the element by generating a vibration wave by an electrostrictive element, and polarizing the elements into inner and outer rows, thereby efficiently generating the bending vibration in the ring surface. CONSTITUTION:A polarized ring-shaped electrostrictive element 112 is secured to the planar surface of a ring-shaped vibrator 31. The element is polarized in inner and outer rows in a plane oppositely in the polarizing direction. A movable element 35 energized by a spring 20 is planely contacted with the inner or outer peripheral surface of the vibrator 31, a frequency voltage to generate a bending vibration on the ring surface of the vibrator 31 is applied to the element 112 to drive the element 35. Thus, the bending vibration can be efficiently utilized, and the contacting area can be increased. Accordingly, high output can be obtained. |
