| 摘要 |
PURPOSE:To convert a high frequency voltage into a driving force efficiently by applying said high frequency voltage with a phase difference to piezoelectric elements in two adjacent sides of respective opposed sides of each oscillator. CONSTITUTION:A piezoelectric driver is composed of an oscillator 2 having a square shape in cross section formed into a quadrilateral body of piezoelectric material, and said oscillator 2 is equipped with a piezoelectric element part 4 having electrodes 8a-8b and bas an oscillator 1 for resonant oscillation, a power unit 5 and a contact member 6. Thus, a given high frequency voltage with a phase difference (90 degrees) from the power unit 5 is applied to respective piezoelectric element parts 41-44 of the oscillating body 2 for excitation, respective opposed sides 3 oscillate in longitudinal and lateral directions, respectively. As a result, the tip part of the oscillator 1 moves circularly or elliptically and the contact member 6 moves linearly in the direction of the arrow P as shown in the drawing. |
