Light-emitting device

Patent metadata

Field	Value
Publication number	US-9470409-B2
Application number	US-201414521991-A
Country	US
Kind code	B2
Filing date	Oct 23, 2014
Priority date	Aug 5, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A light-emitting device comprising a heat dissipation carrier, a circuit board, a light-emitting element, a side heat conduction plate, an insulation shell and a light cover is provided. The circuit board is disposed on the heat dissipation carrier. The light-emitting element is disposed on the circuit board. The light cover is directly engaged with the heat dissipation carrier. The side heat conduction plate is engaged with the heat dissipation carrier and comprises a transverse plate and a side plate. The transverse plate carries the circuit board. The side plate is connected with the transverse plate. The insulation shell covers the side plate of the side heat conduction plate.

First claim

What is claimed is:

1. A light-emitting device, comprising:
a heat dissipation carrier;
a circuit board disposed on the heat dissipation carrier;
at least one light-emitting element disposed on the circuit board;
a side heat conduction plate engaged with the heat dissipation carrier, and comprising:
a transverse plate carrying the circuit board; and
a side plate connected with the transverse plate;

a light cover directly engaged with the heat dissipation carrier, wherein the light cover has an engaging recess, and the heat dissipation carrier comprises at least one hook which is engaged with the engaging recess; and
an insulation shell at least covering the side plate of the side heat conduction plate.

2. The light-emitting device according to claim 1 , wherein the side plate of the side heat conduction plate comprises:
an upper portion connected with the transverse plate and placed in a vertical orientation;
a lower portion placed in an inclined orientation; and
a connection plate connecting the upper portion with the lower portion, and having a curved surface.

3. The light-emitting device according to claim 2 , wherein the lower portion has a positioning through hole for fixing the relative position between a mold and the side heat conduction plate.

4. The light-emitting device according to claim 2 , wherein the connection plate has a mold flow through hole.

5. The light-emitting device according to claim 1 , wherein the side heat conduction plate comprises a plurality of sub heat dissipation plates arranged in an annular shape, each of the sub heat dissipation plates comprises a protrusion and a recess, and the protrusion of one of the sub heat dissipation plate is engaged with the recess of the adjacent sub heat dissipation plate.

6. The light-emitting device according to claim 1 , wherein an upper portion of the side plate is separated from the insulation shell.

7. The light-emitting device according to claim 1 , wherein the engaging recess of the light cover is a through hole or a groove.

8. The light-emitting device according to claim 1 , wherein the heat dissipation carrier is formed by using a sheet metal processing capable of easily forming the at least one hook.

9. The light-emitting device according to claim 1 , wherein the heat dissipation carrier further comprises:
a carrier plate having an upper surface for carrying the circuit board; and
a protruding portion projected from a lateral surface of the carrier plate;
wherein, the hook comprises a first sub-hook and a second sub-hook, and the first sub-hook and the second sub-hook are connected with two opposite sides of the protruding portion respectively and projected toward a direction away from the upper surface of the carrier plate.

10. The light-emitting device according to claim 1 , wherein the light cover comprises a T-shaped engaging portion having a first and a second engaging recess, and the hook comprises a first sub-hook and a second sub-hook which respectively are engaged with the first and the second engaging recesses of the T-shaped engaging portion.

11. The light-emitting device according to claim 1 , wherein the light cover comprises an engaging portion comprising a vertical portion and a transverse portion, and a transverse width of the vertical portion is less than that of the transverse portion, making the engaging portion capable of forming a first and a second engaging recess.

12. The light-emitting device according to claim 1 , wherein the light cover comprises an engaging portion, the engaging portion comprises a first sub-engaging strip and a second sub-engaging strip, and the engaging recess is formed between the first sub-engaging strip and the second sub-engaging strip.

13. The light-emitting device according to claim 1 , wherein the heat dissipation carrier comprises a plurality of stopper protrusions, and the circuit board is located among the stopper protrusion.

14. The light-emitting device according to claim 1 , wherein the heat dissipation carrier has an engaging through hole, the side heat conduction plate comprises a first engaging arm and a second engaging arm opposite to the first engaging arm, and the first engaging arm and the second engaging arm expand outwardly, such that a distance between the first engaging arm and the second engaging arm is greater than an inner diameter of the engaging through hole for the first engaging arm and the second engaging arm being engaged with the engaging through hole.

15. The light-emitting device according to claim 14 , wherein the side heat conduction plate is formed by using a sheet metal processing capable of easily forming the first engaging arm and the second engaging arm.

16. The light-emitting device according to claim 1 , wherein the heat dissipation carrier has a plurality of engaging protrusions and a plurality of the engaging recesses, and each of the engaging protrusions is positioned between two adjacent engaging recesses.

17. The light-emitting device according to claim 1 , wherein the circuit board has a first through hole and a second through hole, the heat dissipation carrier has a third through hole and a fourth through hole, and the light-emitting device further comprises:
a driver comprising a first pin and a second pin, wherein the first pin penetrates the first through hole and the third through hole, and the second pin penetrates the second through hole and the fourth through hole.

18. The light-emitting device according to claim 1 , further comprising:
an electric pad formed on the heat dissipation carrier;
wherein, the at least one light-emitting element is disposed on and electrically connected with the electric pad.

19. The light-emitting device according to claim 1 , wherein the side heat conduction plate comprises an engaging stud, the side heat dissipation carrier has an engaging through hole, the engaging stud of the side heat conduction plate is engaged with the engaging through hole of the heat dissipation carrier to fix a relative position between the heat dissipation carrier and the side heat conduction plate.

Assignees

• Lite On Electronics Guangzhou Ltd
• Lite On Technology Corp

Inventors

• Chen Chin-Rong
• Pei Chien-Chang
• Liang Wen-Kwei
• Chen Chung-Dao

Classifications

• F21K9/23

  Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings · CPC title

• F21V19/0055

  by screwing · CPC title

• F21V23/009

  the casing being inside the housing of the lighting device · CPC title

• F21K9/238

  Arrangement or mounting of circuit elements integrated in the light source · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title