# US 2017/0284652 A1 · Heat radiation member and lighting device

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- Number: US 2017/0284652 A1
- Document ID: US20170284652A1
- Status: Published application
- Kind: A1
- Application number: 15/472,807
- Filed: 2017-03-29
- Published: 2017-10-05
- Earliest claimed: 2016-04-01
- Assignees: MINEBEA MITSUMI Inc.
- Applicants: Minebea Mitsumi Inc.
- Inventors: Masahiro KITAGAWA
- Web page: https://patentgrep.com/patent/US20170284652A1

## CPC

- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21V 21/30: Pivoted housings or frames
- F21V 29/74: with fins or blades
- F21V 29/76: with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

A heat radiation member according to an embodiment includes a plurality of heat radiation fins each formed in a plate shape and a plurality of ribs. The plurality of heat radiation fins is disposed upright from a base on which a light source is to be fitted, and is arranged in a predetermined direction. The plurality of ribs extends to each of facing surfaces of the plurality of heat radiation fins and is provided on a part of the plurality of heat radiation fins in an upright direction.

## Claims

### Claim 1

A heat radiation member, comprising:
a plurality of heat radiation fins each formed in a plate shape, the plurality of heat radiation fins being disposed upright from a base on which a light source is to be fitted, and being arranged in a predetermined direction; and
a plurality of ribs that extends to each of facing surfaces of the plurality of heat radiation fins and that is provided on a part of the plurality of heat radiation fins in an upright direction.

### Claim 2 (depends on 1)

The heat radiation member according to claim 1, wherein the plurality of ribs is inclined relative to the upright direction of the plurality of heat radiation fins.

### Claim 3 (depends on 1)

The heat radiation member according to claim 1, wherein the plurality of ribs is spaced apart in the upright direction of the plurality of heat radiation fins and is provided on each of the facing surfaces.

### Claim 4 (depends on 3)

The heat radiation member according to claim 3, wherein the plurality of ribs that is between a pair of the facing surfaces has inclination directions aligned relative to the upright direction of the plurality of heat radiation fins.

### Claim 5 (depends on 1)

The heat radiation member according to claim 1, wherein the plurality of ribs that is provided on each of the facing surfaces includes a group of first ribs and a group of second ribs the group of first ribs being inclined in a first direction relative to the upright direction of the plurality of heat radiation fins and the group of second ribs being inclined in a second direction being opposite to the first direction, relative to the upright direction of the plurality of heat radiation fins.

### Claim 6 (depends on 5)

The heat radiation member according to claim 5, wherein the group of first ribs and the group of second ribs are equal in number.

### Claim 7 (depends on 1)

The heat radiation member according to claim 1, wherein one of the plurality of ribs and another of the plurality of ribs are line-symmetrical with respect to a center line, the center line extending in the upright direction of the plurality of heat radiation fins and passing through a center of both ends of the plurality of at radiation fins in the predetermined direction and a center of the plurality of heat radiation fins in a width direction.

### Claim 8 (depends on 1)

The heat radiation member according to claim 1, wherein the plurality of heat radiation fins is odd in number.

### Claim 9

A lighting device, comprising:
the heat radiation member according to claim I; and
a light source that is fitted to the heat radiation member.

### Claim 10 (depends on 9)

The lighting device according to claim 9, wherein
the light source rotates around a predetermined rotation axis to change an irradiation direction.