Vehicle lamp

Patent metadata

Field	Value
Publication number	US-10648641-B2
Application number	US-201716326583-A
Country	US
Kind code	B2
Filing date	Aug 21, 2017
Priority date	Aug 22, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A vehicle lamp comprises: a substrate; a semiconductor light source which is mounted on the substrate; a lens which emits light from the semiconductor light source; and a heat sink having a planar first surface which is formed in the shape of a plate from a metal material, is in contact with and affixed to the substrate, and supports the lens, and a planar second surface which is the back surface of the first surface, the heat sink being plastically deformed by a plurality of recesses disposed in a prescribed pattern in a surface machining area on the second surface that includes an area on the back side of the contact area.

First claim

The invention claimed is:

1. A vehicular lamp comprising:
a substrate;
a semiconductor light source mounted on the substrate;
an optical element emitting light from the semiconductor light source; and
a heat radiating element composed of a plate-like metal member and having a first flat face fixing the substrate which is in contact therewith and supporting the optical element and a second flat face disposed on the back side of the first face, wherein a plurality of recesses are provided in a predetermined pattern in at least an area on the second face which is the back side of the area of the first face corresponding to the substrate, wherein the plurality of recesses are provided by plastic deformation of the plate-like member.

2. The vehicular lamp according to claim 1 , wherein,
the substrate is fixed to the heat radiating element with a threaded member,
the heat radiating element has a screw hole penetrating the first face and the second face and receives the threaded member in the screw hole, and
the plurality of recesses are disposed around the screw hole while leaving space around the screw hole.

3. The vehicular lamp according to claim 2 , wherein the threaded member comprises a self-tapping screw.

4. The vehicular lamp according to claim 1 , wherein the heat radiating element is disposed in a state with residual stress causing bending.

5. The vehicular lamp according to claim 1 , wherein the plurality of recesses each has a polygonal shape.

Assignees

• Ichikoh Industries Ltd

Inventors

• Abe Toshiya

Classifications

• F21S41/192

  Details of lamp holders, terminals or connectors · CPC title

• F21S45/47 Primary

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

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• F21V19/00

  Fastening of light sources or lamp holders (fastening electric light source solely by the coupling device H01R33/00 {; special means for attaching candle to candle holder F21V35/003}) · CPC title

• F21V29/503

  of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) · CPC title