Vehicle lighting device

Patent metadata

Field	Value
Publication number	US-9506620-B2
Application number	US-201414178498-A
Country	US
Kind code	B2
Filing date	Feb 12, 2014
Priority date	Feb 15, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

There is provided a lighting device which is to be mounted on a vehicle. The lighting device includes: a housing forming a lamp chamber, the housing including a wall having an opening therethrough; a light source which is disposed in the lamp chamber; a heat sink, wherein the light source is fixed to the heat sink; a fixation portion, wherein the heat sink is fixed to the housing via the fixation portion. A first portion of the heat sink faces an inner surface of the wall. A second portion of the heat sink is exposed to an outside of the wall through the opening. The fixation portion is provided on the outside of the wall to face the opening.

First claim

What is claimed is:

1. A lighting device configured to be mounted on a vehicle, the lighting device comprising:
a housing forming a lamp chamber, the housing comprising a wall having an opening therethrough;
a light source which is disposed in the lamp chamber;
a heat sink, wherein the light source is fixed to the heat sink; and
a fixation portion, the housing comprising the fixation portion,
wherein
the heat sink is fixed to the housing via the fixation portion,
a first portion of the heat sink is provided inside the housing and faces an inner surface of the wall, the first portion being substantially parallel to the inner surface of the wall,
a second portion of the heat sink is exposed to an outside of the wall through the opening,
the fixation portion is provided on the outside of the wall to face the opening,
the housing comprises an arm extending from the wall,
the fixation portion extends from the arm, and
the fixation portion extending substantially parallel to the inner surface of the wall.

2. The lighting device according to claim 1 , further comprising: a sealing member which is pressed between the first portion of the heat sink and the inner surface of the wall.

3. The lighting device according to claim 2 , wherein a groove for accommodating the sealing member is formed in one of the first portion of the heat sink or the inner surface of the wall, and wherein a protrusion for pressing the sealing member is formed in the other of the first portion of the heat sink or the inner surface of the wall.

4. The lighting device according to claim 2 , wherein the first portion of the heat sink and the inner surface of the wall contact each other between the opening and the sealing member.

5. The lighting device according to claim 1 , further comprising: an optical system configured to guide light emitted from the light source in a certain direction; and a screw configured to adjust a reference position of an optical axis of the optical system, wherein the screw extends to penetrate the second portion of the heat sink.

6. The lighting device according to claim 1 , wherein the heat sink and the fixation portion are discrete structures.

7. The lighting device according to claim 1 , wherein the first portion of the heat sink is provided on a first side of the wall in an optical axis direction adjacent the inner surface of the wall, and the second portion of the heat sink is provided on a second side of the wall in the optical axis direction adjacent an outer surface of the wall.

8. The lighting device according to claim 1 , wherein the heat sink comprises a post configured to contact the fixation portion, and the post of the heat sink is fixed to the housing via the fixation portion.

9. The lighting device according to claim 8 , wherein the post of the heat sink comprises a hole, and the post of the heat sink is configured to be fixed to the fixation portion of the housing with a fastener.

10. A lighting device configured to be mounted on a vehicle, the lighting device comprising:
a housing forming a lamp chamber, the housing comprising a wall having an opening therethrough;
a light source which is disposed in the lamp chamber;
a heat sink, wherein the light source is fixed to the heat sink;
a fixation portion, wherein the heat sink is fixed to the housing via the fixation portion, wherein a first portion of the heat sink faces an inner surface of the wall, wherein a second portion of the heat sink is exposed to an outside of the wall through the opening, and wherein the fixation portion is provided on the outside of the wall to face the opening;
an optical system configured to guide light emitted from the light source in a certain direction; and
a screw configured to adjust a reference position of an optical axis of the optical system, wherein the screw extends to penetrate the second portion of the heat sink,
and wherein the optical axis of the optical system is adjusted with respect to the light source.

Assignees

• Koito Mfg Co Ltd

Inventors

• Shibata Hiroki
• Oishi Kazutami

Classifications

• B60Q1/0683

  Adjustable by rotation of a screw · CPC title

• B60Q1/007

  via a removable cap · CPC title

• F21S45/50

  Waterproofing · CPC title

• F21S45/49

  Attachment of the cooling means · CPC title

• F21S41/255

  Lenses with a front view of circular or truncated circular outline · CPC title