| 摘要 |
PURPOSE:To decrease the abrasion of a friction contact part and to diminish the change with the passage of time of a braking torque by furnishing the contact part of a vibrator and a movable body with a friction material composed mainly of fluororesin and filled with a uniformly dispersed whisker-shaped powder. CONSTITUTION:To constitute a vibration part, a vibrator 2 made of an elastic body such as metal is stuck and fixed to the surface of a piezoelectric body 1. To constitute a movable part, a friction material 4 composed of fluororesin filled with a whisker-shaped powder is fixed to the operating surface of a movable body 2. The surface of said friction material 4 is brought into pressure contact with the surface of the vibrator 2, and the high-frequency electric field of a resonance frequency is applied to the piezoelectric body 1. |
