Patent ID: 8363342

Claim:
A piezoelectric actuator comprising: a protruding portion that protrudes from a first face of a base member toward a moving member and is capable of supporting the moving member; a first piezoelectric element that is disposed along a member other than the protruding portion and that is capable of expanding and contracting in an orthogonal direction that is orthogonal to the first face; and a second piezoelectric element that is disposed along the member other than the protruding portion and that is capable of expanding and contracting in a direction other than the orthogonal direction wherein the first piezoelectric element is disposed between the first face and a first member other than the protruding portion, and the second piezoelectric element is disposed between the first member and a second member other than the first member, and wherein the first member includes a second face that is orthogonal to the first face, the second member includes a third face that is orthogonal to the first face, and the second piezoelectric element is disposed between the second face and the third face.