Patent ID: 9748869
Date: 2017-08-29
CPC Classifications: H02N

Claim:
1. A vibration power generator in which an electret group including a plurality of electrets and an electrode group including a plurality of electrodes are displaced in a relative movement direction by an external vibration, and vibration power generation is thereby performed, comprising: a housing portion that accommodates the electret group and the electrode group; a fixed member that is fixed to a bottom surface side of the housing portion and has one of the electret group and the electrode group as a fixed member-side power generation element; a movable member that is accommodated in the housing portion so as to be capable of relative movement by the external vibration while opposing the fixed member, and has the other of the electret group and the electrode group as a movable member-side power generation element; a plurality of first support members that are disposed so as to be slidable on the fixed member, are interposed directly between the fixed member and the movable member so as to define a gap between the fixed member-side power generation element along a direction in which the movable member and the fixed member oppose each other and the movable member-side power generation element, and support the movable member so as to allow relative movement of the movable member with respect to the fixed member; and a plurality of second support members that are disposed between the movable member and inner wall surfaces of the housing laterally to the movable member so as to define a gap along a direction orthogonal to a direction of the relative movement and the direction in which the movable member and the fixed member oppose each other, and support the movable member with respect to the inner wall surfaces of the housing, wherein the fixed member has: a power generation substrate including the fixed member-side power generation element; and a slide substrate that is stacked on the power generation substrate on a side opposite to the movable member in an opposing direction of the fixed member and the movable member, and has slide surfaces on which the plurality of first support members slide and which are formed on a common substrate surface.