| 摘要 |
PURPOSE:To obtain an actuator of simple structure, small size, low power, low heat generation, and without magnetic interference by using a piezoelectric element as a driving source of a flying member. CONSTITUTION:Piezoelectric elements 4 and 6 are arranged in parallel on a leaf spring 1. Another end 4b of the piezoelectric element 4 is fixed to an attachment member 3 so as to bring a movable contact 2 arranged on a concave side of bend of the leaf spring 1 in contact with a contact 5a of an actuating leaf spring 5 with a certain pilot pressure. The end part 6b of a piezoelectric element 6 is fixed so as to make a contact 7a of an actuating leaf spring 7 symmetrical to the contact 5a with respect to the leaf spring 1. When a voltage is applied to the piezoelectric element 4, the element 4 is displaced minutely, but at high speed. Then the center of the leaf spring 5 bends and the movable contact 2 as a flying member is separated from the contact 5. The leaf spring 1 is reversed and comes in contact with the contact 7a. When a voltage is applied to the piezoelectric element 6, the movable contact 2 is separated from the contact 7a and the leaf spring 1 is reversed again to be in contact with the contact 5a. Thus the alternate contact of the movable contact 2 can be obtained. |
