| 摘要 |
PURPOSE:To obtain a high output by using the peripheral surface of a vibrator as a contacting surface of a moving element in a motor for driving the element by generating a vibration wave with an elecrostrictive element, and disposing the electrostrictive elements on both sides of the vibrator, thereby generating a large twisting vibration. CONSTITUTION:Polarized ring-shaped electrostrictive elements 12, 12' are respectively bonded to the planar surfaces of both sides of a ring-shaped vibrator 31, a frequency voltage is applied to the elements 12, 12' to allow the vibrator 31 to generate a traveling vibration wave and a twisting vibration. A movable elment 35 energized by a spring 20 is frictionally contacted with the peripheral surface of the inner or outer peripheral surface side of the vibrator 31, and rotatably driven by the traveling vibration wave. Thus, twice twisting vibration is obtained as compared with the case that the electrostrictive element is secured to one side of the vibrator 31, thereby obtaining high output. |
