DEVICE FOR MAGNIFYING DISPLACEMENT OF PIEZOELECTRIC ELEMENT

摘要

A device for magnifying displacement of an elongated piezoelectric element adapted to be displaced by application of voltage thereto, including a main frame extending along one side of the piezoelectric element and having a lateral projection for supporting one end of the piezoelectric element with respect to a direction of displacement of the piezoelectric element; a movable member mounted on the other end of the piezoelectric element with respect to the direction of displacement of the piezoelectric element; a first leaf spring fixed at its one end portion to the main frame; a second leaf spring fixed at its one portion to the movable member and disposed in opposed relationship to the first leaf spring; a rocking member fixedly connected to the other end of the first leaf spring and the other end of the second leaf spring and adapted to be rocked by flexing of the first and second leaf springs to be generated by the displacement of the piezoelectric element; a sub frame extending along the other side of the piezoelectric element opposite to the main frame to a position opposed to the movable member and fixedly connected at its one end to the lateral projection of the main frame; and a quadri-hinged parallel link mechanism fixed to the movable member and the other end of the sub frame, so as to displace the movable member in parallel to the direction of displacement of the piezoelectric element.