| 摘要 |
PURPOSE:To efficiently vibrate an output end section shorter in the axial direction and longer in the right angle direction, by driving an electrostrictive element having an electrode divided into two on one surface, and a common electrode on the other surface, with flexible-direction resonance frequency. CONSTITUTION:On one surface of the main unit of an electro-strictive element polarized in the thickness direction, an electrode divided into two is formed, and on the other surface, a common electrode is formed to compose the electrostrictive element 14. On both surfaces of one or more pieces of the electrostrictive element 14, metallic members 19, 21 are integrally formed to be fastened with a fastening member 22. To the electrode of the electrostrictive element 14, driving voltage based on the phase difference of 180 deg. is applied to drive the element 14 on flexible-direction resonance frequency. |
