| 摘要 |
PURPOSE:To make no noise and to keep holding force constant in standstill by forming an oscillating body of an ultrasonic motor by a resin sheet-like moulded body containing milled fiber at a predetermined rate. CONSTITUTION:An ultrasonic motor is constituted by pressurizing a moving body 3 and by bringing it into contact with a tabular oscillating body 2 equipped with a tabular piezoelectric body 1. This moving body 3 is furnished with a frictional contact section 4 to come into frictionally contact with the oscillating body 2 and a power transmission section 5. In this connection, the above frictional contact section 4 is formed by a resin sheet-like moulded body containing milled fiber at the rate of not less than 5weight% and not more than 40weight%. This milled fiber is so fine a fiber in shape that there are less scratching phenomenon and less attackingness against its assortive material on the frictional contact surface and smooth sliding can be materialized between the oscillating body 2 and moving body 3. |
