Patent ID: 8334638
Filing Date: 2012-12-18
Classification: H01L,H02N

Abstract:
1. A piezoelectric power generation device comprising: a spiral-shaped piezoelectric element having a center-side end and an outer-side end; a first fixing member to which the center-side end of the piezoelectric element is fixed; and a second fixing member to which the outer-side end of the piezoelectric element is fixed, the piezoelectric element including: a first spiral-shaped piezoelectric body polarized in a radial direction from a first side toward a second side thereof; a first electrode disposed on the first side of the first spiral-shaped piezoelectric body; a second electrode disposed on the second side of the first spiral-shaped piezoelectric body; and a spiral-shaped member disposed on one of the second electrode and the first electrode, wherein the first and second fixing members are arranged such that the second fixing member is displaceable relative to the first fixing member in a direction tangential to the outer-side end of the spiral-shaped piezoelectric element, and the second fixing member is restricted from displacing relative to the first fixing member in a direction perpendicular to the direction tangential to the outer-side end of the spiral-shaped piezoelectric element.