Lighting fixture for vehicle

Patent metadata

Field	Value
Publication number	US-10851964-B2
Application number	US-201816485758-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Feb 24, 2017
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A vehicle lighting fixture includes: a light source; an outer lens disposed in front of the light source; a heat sink thermally connected to the light source; and an air blower having air blowing openings behind the light source. The heat sink includes: a base portion extending outward, relative to the light source, in an intersection direction intersecting with an optical axis of the light source; and a heat dissipation portion extending longitudinally from an outer portion of the base portion in the intersection direction, dissipating heat to the air blown from the air blowing openings, and directing the air to the outer lens.

First claim

The invention claimed is:

1. A vehicle lighting fixture comprising: a light source; an outer lens disposed in front of the light source; a heat sink thermally connected to the light source; and an air blower having an air blowing portion behind the light source, wherein
the heat sink includes:
a base portion extending radially outward relative to the light source, in a direction intersecting with an optical axis of the light source; and
a heat dissipation portion extending from a radially outer portion of the base portion in a direction parallel with the optical axis, dissipating heat to air blown from the air blowing portion, and directing the air to the outer lens.

2. The vehicle lighting fixture of claim 1 , wherein
the light source is provided in front of the base portion, and provided in a center portion of the base portion when viewed from a front.

3. The vehicle lighting fixture of claim 1 , wherein
the heat dissipation portion extends to a position at which a front end of the heat dissipation portion is located frontward of the light source.

4. The vehicle lighting fixture of claim 1 , wherein
a back portion, of the heat dissipation portion, behind the base portion is longer than a front portion, of the heat dissipation portion, in front of the base portion.

5. The vehicle lighting fixture of claim 1 , wherein
the heat dissipation portion is comprised of: a heat dissipation main body provided in a peripheral direction with the light source as a center portion; and a plurality of heat dissipation fins standing outward in the intersection direction from the heat dissipation main body, extending longitudinally, and disposed in the peripheral direction, and
an air guiding portion is defined by the heat dissipation fins to direct blown air to the outer lens.

6. The vehicle lighting fixture of claim 5 , wherein
the heat dissipation fins are formed to have a projecting length larger than a thickness of the base portion.

7. The vehicle lighting fixture of claim 5 , wherein
the air blower is configured to eject the air from the air blowing portion provided at a site corresponding to the air guiding portion of the heat dissipation portion in the peripheral direction.

Assignees

• Mazda Motor

Inventors

• Nakaya Yoshiaki

Classifications

• F21S45/60 Primary

  Heating of lighting devices, e.g. for demisting · CPC title

• F21S45/43 Primary

  using gas · CPC title

• F21S45/49

  Attachment of the cooling means · CPC title

• F21S45/47

  Passive cooling, e.g. using fins, thermal conductive elements or openings · CPC title

• F21S41/143

  the main emission direction of the LED being parallel to the optical axis of the illuminating device · CPC title