Piezoelectric power generator

摘要

Provided is a piezoelectric power generator that has an overall compact size and in which a plurality of piezoelectric elements having a low natural frequency of vibration and that generate a large amount of power can be arranged in a compact manner.;A piezoelectric power generator includes a first and second piezoelectric elements, which each have a cantilever structure, fixed to the top of two opposing side walls of a housing. The first piezoelectric element and the second piezoelectric element are arranged so as to oppose each other in an alternating manner and respectively have a first weight and a second weight joined to free ends thereof. Unused spaces formed below the fixed end sides of the piezoelectric elements are used as spaces in which the weights can move by positioning one of the weights under the fixed end side of the other of the piezoelectric elements.

主权项

1. A piezoelectric power generator comprising:
a box-shaped housing including first and second walls that oppose each other across a space of the housing, a first piezoelectric element having a fixed end portion that is fixed to the first wall of the housing and a free end portion that extends toward the second wall of the housing; a second piezoelectric element having a fixed end portion that is fixed to the second wall of the housing and a free end portion that extends toward the first wall of the housing; a first weight coupled to a bottom surface of the free end portion of the first piezoelectric element, such that at least a portion of the first weight is disposed in the space of the housing; and a second weight coupled to a bottom surface of the free end portion of the second piezoelectric element, such that at least a portion of the second weight is disposed in the space of the housing, wherein an upper surface of the first weight comprises a protrusion coupled to the bottom surface of the free end portion of the first piezoelectric element, and wherein an upper surface of the second weight comprises a protrusion coupled to the bottom surface of the free end portion of the second piezoelectric element.