| 摘要 |
PURPOSE:To increase a rotary torque and to enable quick operation and stop by connecting between two arms with other arm and an electrostrictive effect element, using two sets of the elements to interpose another electrostrictive effect element therebetween. CONSTITUTION:A piezoelectric actuator rotates a disk 13 having a rotational shaft 14, arms 1, 2 connected through hinges 3, 4 with an arm 8, connected through hinges 5, 6 by an electrostrictive effect element 7 (clampers 9, 10), and the clampers 9, 10 connected laterally symmetrically at both right and left sides by an electrostrictive effect element 11. Thus, when an electric signal is applied to the element 7, it is elongated, transmitted through the hinges 5, 6 to the arms 1, 2, further amplified and increased by a principle of a lever of the hinges 3, 5, the arms 1, 8 and the hinges 4, 6 and arms 2, 8 to perform a clamping operation. Thus, part of the outer periphery of the disk 13 is disposed to pass the arms of the clampers 9, 10 to rotate it. |
