Lighting device for a vehicle headlight

Patent metadata

Field	Value
Publication number	US-9803825-B2
Application number	US-201414893167-A
Country	US
Kind code	B2
Filing date	May 27, 2014
Priority date	May 29, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The invention relates to a lighting device ( 1 ) for a vehicle headlight, wherein the lighting device comprises: at least one LED light source ( 2 ), at least one light-shaping optics body ( 3 ), which is paired with the at least one LED light source ( 2 ), and at least one LED light source carrier ( 4 ), on which the at least one LED light source ( 2 ) is fastened. In accordance with the invention, positioning means ( 3 a, 3 b, 3 c ) for positioning the at least one LED light source carrier ( 4 ) are provided on the optics body ( 3 ), positioning means ( 30; 3 a ) for the subsequent positioning of a heat sink ( 5 ) on the optics body ( 3 ) are also provided, wherein a fixing element ( 6 ) is also provided, which can be fastened to the optics body ( 3 ) in such a way that in the fastened state the fixing element ( 6 ) presses the heat sink ( 5 ) against the LED light source carrier ( 4 ), such that this is fixed in its position on the optics body ( 3 ).

First claim

The invention claimed is:

1. A lighting device ( 1 ) for a vehicle headlight, wherein the lighting device comprises:
at least one LED light source ( 2 );
at least one light-shaping optics body ( 3 ), which is paired with the at least one LED light source ( 2 ); and
at least one LED light source carrier ( 4 ), on which the at least one LED light source ( 2 ) is fastened;
positioning means ( 3 a , 3 b , 3 c ) on the optics body ( 3 ) for positioning the at least one LED light source carrier ( 4 );
positioning means ( 31 ; 3 a ) for the subsequent positioning of a heat sink ( 5 ) on the optics body ( 3 ); and
a fixing element ( 6 ), which can be fastened to the optics body ( 3 ) in such a way that in a fastened state the fixing element ( 6 ) presses the heat sink ( 5 ) against the LED light source carrier ( 4 ), such that this is fixed in its position on the optics body ( 3 ),
wherein at least two domes ( 3 a ) are arranged on the optics body ( 3 ),
wherein the fixing element ( 6 ) has a number of resilient clamp portions ( 6 a ) corresponding to the number of the at least two domes ( 3 a ),
wherein each dome ( 3 a ) in a region extending away from the optics body ( 3 ) has at least one run-on portion ( 3 a ′) for in each case one resilient clamp portion ( 6 a ) of the fixing element ( 6 ), and wherein the fixing element ( 6 ) is configured to be slid onto the optics body ( 3 ) or the heat sink ( 5 ) in a direction normal to the orientation (Z) of the domes ( 3 a ), and the resilient clamp portions ( 6 a ) are configured to be pressed and clamped against the at least one run-on portion ( 3 a ′) in the direction of the optics body ( 3 ).

2. The lighting device of claim 1 , wherein the at least two domes ( 3 a ) protrude from the optics body ( 3 ) in a manner extending parallel to one another.

3. The lighting device of claim 1 , wherein the at least two domes ( 3 a ) are formed in one piece with the optics body ( 3 ).

4. The lighting device of claim 1 , wherein the optics body ( 3 )-comprises at least one retaining spring ( 3 b ), wherein the positioning means for the LED light source carrier ( 4 ) comprises the least two domes ( 3 a ) and the at least one retaining spring ( 3 b ).

5. The lighting device of claim 1 , wherein the LED light source carrier ( 4 ) has a number of recesses ( 4 a ) corresponding to the number of domes ( 3 a ), by means of which recesses the LED light source carrier ( 4 ) can be positioned in a direction (X) normal to the orientation (Z) of the domes ( 3 a ).

6. The lighting device of claim 1 , further comprising a positioning pin ( 3 c ) arranged on the optics body ( 3 ), wherein the LED light source carrier ( 4 ) has a corresponding recess ( 4 b ), by means of which the LED light source carrier ( 4 ) can be positioned in a direction (Y) normal to the orientation of the at least two domes ( 3 a ).

7. The lighting device of claim 1 , wherein the positioning means for the heat sink ( 5 ) comprise at least one positioning recess ( 31 ) and/or positioning rib, which is/are arranged on the optics body ( 3 ).

8. The lighting device of claim 7 , which comprises at least two positioning recesses and/or positioning ribs arranged on the optics body, and the at least two positioning recesses ( 31 ) and/or positioning ribs extend parallel to one another.

9. The lighting device of claim 7 , wherein the heat sink ( 5 ) on a side facing towards the optics body ( 5 ) has at least one positioning rib ( 30 ) corresponding to the at least one positioning recess ( 31 ) arranged on the optics body.

10. The lighting device of claim 1 , wherein the positioning means for the heat sink ( 5 ) are formed by the at least two domes ( 3 a ) arranged on the optics body ( 3 ).

11. The lighting device of claim 1 , wherein the heat sink ( 5 ) has a number of dome openings ( 5 a ) corresponding to the number of the at least two domes ( 3 a ), through which openings the at least two domes ( 3 a ) are inserted.

12. The lighting device of claim 1 , wherein in the fully inserted state of the at least two domes ( 3 a ), the run-on portions ( 3 a ′) lie at a distance above the respective dome opening ( 5 a ).

13. The lighting device of claim 1 , wherein the heat sink ( 5 ) has at least one stop pin ( 5 b ), wherein the at least one stop pin ( 5 b ) limits the sliding movement of the fixing element ( 6 ) onto the heat sink ( 5 ).

14. The lighting device of claim 1 , wherein the heat sink ( 5 ) and the fixing element ( 6 ) have retaining means ( 5 ′, 6 ′), which prevents the fixing element ( 6 ) from becoming detached from the heat sink ( 5 ) in the slid-on state.

15. The lighting device of claim 14 , wherein the retaining means comprises at least one chamfered pin ( 6 ′) and at least one corresponding indentation ( 5 ′).

16. The lighting device of claim 1 , wherein the fixing means ( 6 ) is formed as a design screen.

17. The lighting device of claim 1 , wherein the optics body ( 3 ) is formed as a reflector.

18. The lighting device of claim 1 , which is formed as a light module for a vehicle headlight.

19. The lighting device of claim 18 , wherein the light module is a reflection module.

20. A motor vehicle headlight having at least one lighting device according to claim 1 .

21. The lighting device of claim 4 , wherein the positioning means for the LED light source has precisely two of the at least two domes and the optics body has precisely two of the at least one retaining spring.

22. The lighting device of claim 7 , wherein the heat sink ( 5 ) on a side facing towards the optics body ( 5 ) has at least one positioning recess corresponding to the at least one positioning rib arranged on the optics body.

Assignees

• Zizala Lichtsysteme Gmbh
• Zkw Group Gmbh

Inventors

• Windgruber Patrick

Classifications

• F21S41/141

  Light emitting diodes [LED] · CPC title

• F21S41/39

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

• F21S45/47 Primary

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

• F21S41/192

  Details of lamp holders, terminals or connectors · CPC title

• F21S45/49 Primary

  Attachment of the cooling means · CPC title