Vibration power generator

Patent metadata

Field	Value
Publication number	US-9748869-B2
Application number	US-201314758140-A
Country	US
Kind code	B2
Filing date	Dec 16, 2013
Priority date	Dec 28, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

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, has 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, and a plurality of support members.

First claim

The invention claimed is:

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.

2. The vibration power generator according to claim 1 , wherein
the slide surfaces of the plurality of first support members are formed on substrate surfaces on both sides of the slide substrate with the power generation substrate interposed between the substrate surfaces so as to extend in the relative movement direction of the movable member with respect to the fixed member.

3. The vibration power generator according to claim 1 , wherein
the fixed member is fixed in a state in which the fixed member is in contact with a housing portion-side contact surface provided in the housing portion, and
a fixed member-side contact surface, which is a contact surface of the fixed member that is in contact with the housing portion-side contact surface, is formed on a part of the substrate surface of the slide substrate that does not overlap the slide surfaces on which the plurality of first support members slide.

4. The vibration power generator according to claim 1 , wherein
the power generation substrate and the slide substrate are each a substrate formed of a glass material.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Ikuta Masayo

Classifications

• H02N1/06

  Influence generators · CPC title

• H02N1/08 Primary

  with conductive charge carrier, i.e. capacitor machines · CPC title

• H02N1/10

  with non-conductive charge carrier · CPC title