# US 8,541,927 B2 · Power generation unit and light emitting tool

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- Number: US 8,541,927 B2
- Document ID: US8541927B2
- Status: Granted
- Kind: B2
- Application number: 12/742,637
- Filed: 2008-11-11
- Published: 2011-01-27
- Granted: 2013-09-24
- Earliest claimed: 2007-11-13
- Applicants: Kohei Hayamizu
- Inventors: Kohei Hayamizu
- Web page: https://patentgrep.com/patent/US8541927B2

## CPC

- H02N 2/186: {Vibration harvesters}
- A01K 85/01: with light emission, sound emission, scent dispersal or the like
- H10N 30/306: {Cantilevers}
- H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A flexible vibration board (12), a piezoelectric element (13) fixed to at least one side of the vibration board (12), and a fixed board (14) and a weight (16) for promoting deformation of the piezoelectric element (13) caused by vibration of the vibration board (12) are provided in the body (10). When the body (10) vibrates by receiving external force, the weight (16) rocks to cause vibration of the vibration board (12), or when the vibration board (12) vibrates, vibration of the vibration board (12) is sustained by the inertia of the weight (16) and the vibration board (12) deforms through vibration thus deforming the piezoelectric element (13) furthermore.

## Claims

### Claim 1

A power generation unit comprising:
a flexible vibration board;
a piezoelectric element fixed on at least one of surfaces of the vibration board; and
a deformation promoting unit that promotes deformation of the piezoelectric element caused by vibration of the vibration board, wherein
the deformation promoting unit is a fixing unit that is arranged on a side of the piezoelectric element and at a position where the deformation promoting unit sandwiches the piezoelectric element together with the vibration board, and
one end of the vibration board and one end of the fixing unit are fixed on a same installation surface.

### Claim 2 (depends on 1)

The power generation unit according to claim 1, wherein one of ends of the fixing unit that is opposite from the one end fixed on the installation surface can abut against a widest portion of a side surface of the piezoelectric element.

### Claim 3 (depends on 1)

The power generation unit according to claim 1, wherein a restricting unit that restricts a vibration range of the vibration board is provided on a side of the fixing unit.

### Claim 4

A power generation unit comprising:
a flexible vibration board;
a piezoelectric element fixed on at least one of surfaces of the vibration board; and
a deformation promoting unit that promotes deformation of the piezoelectric element caused by vibration of the vibration board, wherein
the vibration board includes a first vibrating portion extending along the piezoelectric element and a second vibrating portion that intersects with the first vibrating portion at right angles.

### Claim 5 (depends on 4)

The power generation unit according to claim 4, wherein the vibration board, the piezoelectric element, and the deformation promoting unit are arranged in a road.

### Claim 6 (depends on 4)

A light emitting tool comprising a body having a hollow part, wherein the power generation unit according to claim 4 is provided in the hollow part of the body.

### Claim 7 (depends on 6)

The light emitting tool according to claim 6, wherein
the body is made of a translucent member and formed in a shape of a lure, and
a light emitting unit that emits light by an electromotive force of the piezoelectric element is provided in the hollow part of the body.

### Claim 8 (depends on 2)

The power generation unit according to claim 2, wherein the vibration board, the piezoelectric element, and the deformation promoting unit are arranged in a road.

### Claim 9 (depends on 2)

A light emitting tool comprising a body having a hollow part, wherein
the power generation unit according to claim 2 is provided in the hollow part of the body.

### Claim 10 (depends on 9)

The light emitting tool according to claim 9, wherein
the body is made of a translucent member and formed in a shape of a lure, and
a light emitting unit that emits light by an electromotive force of the piezoelectric element is provided in the hollow part of the body.