Lamp device for vehicle and lighting device for vehicle

Patent metadata

Field	Value
Publication number	US-2016201869-A1
Application number	US-201414913491-A
Country	US
Kind code	A1
Filing date	Aug 22, 2014
Priority date	Aug 23, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

An adjustment mechanism configured to adjust a reference position of an optical axis of a projection lens of a lens unit has a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens. The lens unit moves in an extension direction of the reference axis in accordance with rotation of a second screw. An acting point of a force to move the lens unit is disposed in a plane formed by the optical axis and the reference axis.

First claim

1 . A lamp to be mounted on a vehicle, the lamp comprising:
a light source; a lens unit including a projection lens which is disposed such that at least a portion of light emitted from the light source passes therethrough, and a holder which supports the projection lens; and an adjustment mechanism configured to adjust a reference position of an optical axis of the projection lens, wherein the adjustment mechanism includes:
a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens;
a first screw configured to adjust the reference position in a first direction;
a second screw configured to adjust the reference position in a second direction intersecting with the first direction;
a first transmission mechanism configured to rotate the lens unit about the reference axis in accordance with rotation of the first screw; and
a second transmission mechanism configured to move at least a portion of the lens unit in an extension direction of the reference axis in accordance with rotation of the second screw, and
wherein an acting point of a force by the second transmission mechanism to move the optical axis is disposed in a plane formed by the optical axis and the reference axis.

2 . The lamp according to claim 1 ,
wherein the force by the second transmission mechanism to move the optical axis acts on the holder.

3 . The lamp according to claim 1 ,
wherein the projection lens is supported on the holder to be movable in the extension direction of the reference axis, and wherein the force by the second transmission mechanism to move the optical axis acts on the projection lens.

4 . The lamp according to claim 1 ,
wherein the reference axis is formed on a portion of the holder.

5 . The lamp according to claim 1 ,
wherein the first direction corresponds to an upper-lower direction of the vehicle.

6 . The lamp according to claim 5 ,
wherein the first transmission mechanism includes an actuator having a drive shaft for displacing the optical axis in the first direction, and wherein the first screw and the drive shaft are arranged along an extension direction thereof.

7 . The lamp according to claim 1 , further comprising:
a heat sink which supports the light source, wherein the first screw and the second screw extend through the heat sink.

8 - 25 . (canceled)

Assignees

• Koito Mfg Co Ltd

Inventors

• Shibata Hiroki
• Tachiiwa Takeyuki
• Oishi Kazutami
• Yashiki Satoru
• Inoue Takashi

Classifications

• F21S41/148

  the main emission direction of the LED being perpendicular to the optical axis · CPC title

• F21S41/192

  Details of lamp holders, terminals or connectors · CPC title

• F21S41/295

  specially adapted to projection lenses · CPC title

• F21S41/635

  by moving refractors, filters or transparent cover plates · CPC title

• F21S41/255

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