| 摘要 |
A piezoelectric bimorph type actuator which, given a constant applied voltage, is capable of greater displacement without suffering from the problem of generating a smaller force of displacement or increasing the actuator size. The piezoelectric bimorph type actuator which is cantilevered, includes an electrode plate, a pair of piezoelectric plates provided on both sides of the electrode plate, and a voltage source for applying a voltage between each piezoelectric plate and the electrode plate so as to displace a free end thereof, wherein a ratio t2/t1 between the thickness t2 of the electrode plate and the thickness t1 of each piezoelectric plate is set to be 0.42-1.11 times as much as a ratio E2/E1 between the Young's modulus E2 of the electrode plate and the Young's modulus E1 of each piezoelectric plate. |
