| 摘要 |
PURPOSE:To reduce the size, to enhance the efficiency and to increase the lifetime of a supersonic wave driving method by constructing a dynamic body of an elastic material, and obtaining a drive force directly from the component of the driving direction of a contacting force perpendicular to the contacting surface. CONSTITUTION:Vibrators 301, 302 made of a piezoelectric material are superposed. When the AC voltage of the same wavelength are applied to the both vibrators 301, 302 to generate a standing wave, the vibrators 301, 302 normally vibrate in the same phase and amplitude to generate the holding force while stopping. When the voltage applied to the vibrator 301 or 302 is varied to alter the phase of the standing wave, a contacting force of the component in the drive direction (x) is generated at the contacting position of the vibrators 301, 302, and the vibrator 301 slides with respect to the vibrator 302. |
