Patent ID: 9692287
Date: 2017-06-27
CPC Classifications: H02K

Claim:
1. A vibration electricity generation device, comprising: a fixed unit provided with a coil; a movable unit provided with a magnet; and a plurality of coil springs, wherein the vibration electricity generation device is adapted to generate an induced electromotive force in the coil by the movable unit vibrating in the up and down direction with respect to the fixed unit, wherein the movable unit is supported on the fixed unit in a suspended manner via the plurality of coil springs, wherein the fixed unit comprises a coil supporting member in the shape of a board extended in the up and down direction and the coil is accommodated in a coil accommodating portion formed in the coil supporting member, wherein the movable unit comprises a pair of yokes arranged on both thickness-direction sides of the coil supporting member and the magnet is mounted on the inner surface of each of the yokes, wherein the coil supporting member is formed so as to cover the coil accommodating portion from both thickness-direction sides thereof, and wherein a friction reducing treatment is applied to the surfaces on both thickness-direction sides of the coil supporting member.