Patent ID: 9543499
Date: 2017-01-10
CPC Classifications: H01L,H02N

Claim:
1. A power generation device, comprising: first and second beams which are arranged to face each other and are bent by vibration; a first joint yoke joining one end of the first beam to one end of the second beam; a second joint yoke joining another end of the first beam to another end of the second beam; and a coil wound around the first and second beams, wherein each of the first and second beams includes: a beam body formed into a plate; and a stress relaxation layer made of a material different from a material of the beam body and partially covering the surface of the beam body, and one end of the beam body is joined to the first joint yoke, another end of the beam body is joined to the second joint yoke, and a whole of the beam body is made of a single material.