| 摘要 |
PURPOSE:To provide an ultrasonic linear motor which can be driven at a low voltage with high electromechanical conversion efficiency by paying attention to piezoelectric longitudinal effect of a piezoelectric element as a driving source. CONSTITUTION:The ultrasonic linear motor 20 comprises a piezoelectric element as a driving source, an ultrasonic oscillator 10 for inducing Longitudinal and bending oscillations in a resilient body 11 and combining these oscillations to produce ultrasonic elliptical oscillation, and a driven member 25 partially pressed against the ultrasonic oscillator 10, wherein the ultrasonic oscillator 10 comprises at least two multilayer piezoelectric elements 12 bonded partially to the resilient body 11 with each of the multilayer piezoelectric elements 12 being laminated in same direction. |
