Patent ID: 8400046
Filing Date: 2013-03-19
Classification: B62M,H01L,H02N

Abstract:
1. A power generation unit that converts an externally applied force into electricity, comprising: a plurality of power generation modules; and supporting units that support the power generation modules, wherein the power generation module includes a flexible vibration board, piezoelectric elements fixed on both surfaces of the vibration board, and spacers, the spacers are arranged between the piezoelectric elements, which are arranged in a stacked manner, or arranged between a piezoelectric element and a pressing surface that presses the piezoelectric element, the spacers form a deformation space of the piezoelectric element and transmit a deformation force to the piezoelectric element, the spacers includes central spacers that are fixed to the piezoelectric elements fixed on one of surfaces of the vibration board and arranged near a central portion of the piezoelectric element, and the power generation modules are stacked such that the central spacer of the power generation module and the central spacer of at least one of the power generation modules that is adjacent to the former power generation module are in contact with each other on a same axis.