Vehicle lamp and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9709236-B2
Application number	US-201414507341-A
Country	US
Kind code	B2
Filing date	Oct 6, 2014
Priority date	Oct 11, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A vehicle lamp includes a light source including a semiconductor light emitting device, and a metal support member on which the light source is mounted. The support member is integrally formed with a shade portion configured to block a portion of light emitted from the semiconductor light emitting device.

First claim

What is claimed is:

1. A vehicle lamp comprising:
a light source including a semiconductor light emitting device; and
a support member, formed of metal, on which the light source is mounted, wherein
the support member is integrally formed with a shade portion, formed primarily of metal, configured to block a portion of light emitted from the semiconductor light emitting device,
the shade portion includes a metal portion contiguous to the support member,
the shade portion extends in a direction intersecting with an optical axis of the vehicle lamp, wherein the shade portion further includes:
a first horizontal portion;
a second horizontal portion positioned below the first horizontal portion; and
an inclined portion which connects together the first horizontal portion and the second horizontal portion, and

a line forming portion, formed from an upward-facing upper face portion of the metal portion of the shade portion to a front-facing front face portion of the metal portion, is formed in a rounded shape with a radius of curvature of from 0.1 mm to 1.0 mm in a cross-section orthogonal to the shade portion extension direction.

2. The vehicle lamp according to claim 1 , wherein:
the shade portion includes an undercoat layer formed on the metal portion, and a metal film formed on the undercoat layer.

3. The vehicle lamp according to claim 2 , wherein:
the shade portion includes:
an upper portion of the metal portion forming a connecting portion between the inclined portion and the second horizontal portion includes a recessed portion indented downward.

4. The vehicle lamp according to claim 3 , wherein the undercoat layer is an ultraviolet curable resin including a photopolymerization initiator.

5. The vehicle lamp according to claim 2 , wherein the undercoat layer is an ultraviolet curable resin including a photopolymerization initiator.

6. The vehicle lamp according to claim 1 , wherein at least one protrusion formed during a molding process extends from the support member at the periphery of the shade portion.

7. A method of manufacturing the metal support member of the vehicle lamp of claim 1 , comprising:
preparing a plurality of molds so as to form a cavity forming the shape of the support member; and
introducing metal into the cavity and solidifying the metal, and removing the shade portion integrally formed to the support member, wherein
the plurality of molds are disposed such that at a parting line of the molds is not positioned at the shade portion.

8. The manufacturing method according to claim 7 , wherein the molds include a round shaped portion with a radius of curvature of from 0.1 mm to 1.0 mm, and the shape of the round shaped portion is transferred to form the shade portion.

Assignees

• Koito Mfg Co Ltd

Inventors

• Kato Shingo

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• B22D19/00

  Casting in, on, or around objects which form part of the product (B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00) · CPC title

• B22D25/02

  by its peculiarity of shape; of works of art {(cylinders, pistons B22D15/02)} · CPC title

• F21S45/47

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

• F21W2107/10

  for land vehicles · CPC title