| 摘要 |
PURPOSE:To prevent aging and to improve the durability by forming the contact faces of a driving body and a driven body of metal impregnated with oil. CONSTITUTION:An ultrasonic actuator comprises a driving body 1, Langevin torsional vibrator 2 to be tightened with a bolt, a laminated piezoelectric actuator 3, and a driven body 4. Contact face 4A of the driven body 4 with the piezoelectric actuator 3 is formed of metal impregnated with oil, and the contact face 3A of the piezoelectric actuator 3 with the driven body 4 is formed of metal or inorganic material. |
