Transportation device lamp fixture

Patent metadata

Field	Value
Publication number	US-9255680-B2
Application number	US-201313912685-A
Country	US
Kind code	B2
Filing date	Jun 7, 2013
Priority date	Jun 11, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A transportation device lamp fixture includes a semiconductor light-emitting device, a circuit board to which the semiconductor light-emitting device is mounted, a lamp body, and a front cover that covers an opening of the lamp body. The semiconductor light-emitting device and the circuit board are housed inside of a lamp chamber formed by the lamp body and the front cover, and the circuit board is attached to an inside surface of an upper portion of the front cover or the lamp body.

First claim

What is claimed is:

1. A transportation device lamp fixture comprising:
a semiconductor light-emitting device;
a circuit board to which the semiconductor light-emitting device is mounted;
a lamp body; and
a front cover that covers an opening of the lamp body,
wherein the semiconductor light-emitting device and the circuit board are housed inside of a lamp chamber formed by the lamp body and the front cover; and
the circuit board is directly attached to an inside surface of an uppermost wall of the front cover that delimits the extent of the lamp chamber or an inside surface of an uppermost wall of the lamp body that delimits the extent of the lamp chamber.

2. The transportation device lamp fixture according to claim 1 , further comprising a reflector that reflects light emitted from the semiconductor light-emitting device in front of the lamp fixture, wherein the reflector is attached to one of the front cover and the lamp body, whichever the circuit board is attached to.

3. The transportation device lamp fixture according to claim 2 , wherein
the reflector includes a reflective portion for reflecting the light from the semiconductor light-emitting device, and an attaching portion for attaching the reflector to the front cover or the lamp body; and
the circuit board is attached to the front cover or the lamp body via the attaching portion of the reflector.

4. The transportation device lamp fixture according to claim 1 , wherein a heat sink is formed on a portion of the upper portion of the front cover or the upper portion of the lamp body, and the circuit board is attached to the heat sink.

5. The transportation device lamp fixture according to claim 1 , wherein
the circuit board is attached to the lamp body.

6. The transportation device lamp fixture according to claim 5 , wherein
a front surface of a back portion of the lamp body is formed as a reflective portion.

7. The transportation device lamp fixture according to claim 1 , wherein the transportation device lamp fixture is mounted to a transportation device that does not have another heat source that is different from the transportation device lamp fixture, and that is located around a predetermined position where the lamp fixture is attached.

Assignees

• Koito Mfg Co Ltd

Inventors

• Yasuda Yuji

Classifications

• F21S43/14

  Light emitting diodes [LED] · CPC title

• F21S41/39

  Attachment thereof (achieving variable light distribution by movable reflectors F21S41/675) · CPC title

• F21S45/49

  Attachment of the cooling means · CPC title

• F21S41/19

  Attachment of light sources or lamp holders (achieving variable light distribution by movable light sources F21S41/657) · CPC title

• F21S43/37

  Attachment thereof · CPC title