Patent ID: 7960896

Claim:
A piezoelectric motor comprising: a base; first and second piezoelectric elements that are provided symmetrically on the base to face with each other, the first and second piezoelectric elements being respectively applied with AC driving voltages having a first frequency to actuate in opposite directions; first and second displacement enlarging mechanisms that respectively enlarge actuating displacements of the first and second piezoelectric elements through first and second levers that rotate around first and second fulcrums fixed to the base; first and second leaf springs that are respectively coupled to action points of the first and second levers at one ends thereof; an actuating portion that is coupled to the other ends of the first and second leaf springs and swings in accordance with actuation of the first and the second piezoelectric elements, the actuating portion being urged against a driven member to actuate the driven member with a frictional force between the actuating portion and the driven member; and first and second external springs that respectively urge the first and second displacement enlarging mechanisms against displacement of the first and second displacement enlarging mechanisms caused by a reaction force received by the actuating portion from the driven member.