Lighting apparatus having a drain structure

• US 8,915,616 B2
• Filed: 03/22/2012
• Issued: 12/23/2014
• Est. Priority Date: 12/13/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Yongseog, Kwak, Jinsung, Kim, Yongjin, Jeong, Jongkyo
• Primary Examiner(s): Roy, Sikha
• Application Number:
  US13/426,961
• Publication Number:
  US 20130148360A1
• Time in Patent Office: 1,006 Days
• Field of Search: 362/294, 362/362, 362/373
• US Class Current: 362/294
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 31/03 with provision for venting for vehicle head lights F21S45/33; for vehicle rear lights F21S41/192
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting apparatus is disclosed. The lighting apparatus has a drain structure of guiding water introduced through an assembly clearance to discharge the water to the outside and improves waterproof performance.

Claims

1. A lighting apparatus comprising:

a light emitting unit including an LED module, a heat sink arranged at the rear of the LED module, and a light transmitting member arranged in front of the LED module;

a housing having a first opening in which the light transmitting member is located and a second opening in which the heat sink is located; and

an electronic module arranged within the housing to supply power to the LED module,

wherein a gap is provided between the light transmitting member and the first opening to drain water introduced into the housing through the second opening to the outside of the housing,

wherein the first opening is opposite to the second opening,

wherein the heat sink includes a main body having a plurality of radiation fins protruding from the rear part of the main body,

wherein the plurality of radiation fins extend toward the second opening to be exposed at the second opening of the housing, the plurality of radiation fins being arranged to form at least one channel that guides water into the housing through the second opening,

wherein the light emitting unit is arranged in a first region of the housing and the electronic module is arranged in a second region of the housing, a wall surrounding the electronic module is provided in the second region and forming a space between the wall and the housing, and

wherein the at least one channel on the heat sink communicates with the space in the second region such that water introduced into the second region flows through the space between the wall and the housing to drain out of the housing.

2. The lighting apparatus according to claim 1, wherein:

the main body has a recess;

the LED module is disposed in the recess; and

the light transmitting member surrounds the recess.

3. The lighting apparatus according to claim 1, wherein the light transmitting members include a plurality of concentration lenses.

4. The lighting apparatus according to claim 1, wherein the housing includes:

a first body on which the light emitting unit is arranged and the wall is provided; and

a second body surrounding the electronic module and arranged at a position opposite the wall.

5. The lighting apparatus according to claim 4, wherein the second body is rotatably mounted on the first body.

6. The lighting apparatus according to claim 4, wherein respective areas forming the first region and the second region of the first body are inclined in different directions.

7. The lighting apparatus according to claim 4, wherein a groove part into which a free terminal of the wall is inserted is formed on the second body.

8. The lighting apparatus according to claim 1, wherein the electronic module is arranged so as not to overlap with the first opening and the second opening.

9. The lighting apparatus according to claim 1, further comprising a cable electrically connecting the LED module of the light emitting unit and the electronic module,

wherein a first socket screw-connected to the heat sink is provided at one end of the cable.

10. The lighting apparatus according to claim 9, wherein the cable and the LED module are electrically connected within the heat sink.

11. The lighting apparatus according to claim 9, wherein:

a through hole is formed on the wall; and

a second socket screw-connected to the through hole is provided at the other end of the cable.

12. The lighting apparatus according to claim 1, further comprising:

a support member to locate the housing in a lighting space; and

a holder into which the support member is inserted, the holder being arranged within the housing.

13. The lighting apparatus according to claim 12, wherein the electronic module is electrically connected to an external power supply unit through a power cable passing through the holder to the outside.

14. The lighting apparatus according to claim 1, wherein water introduced into the housing through the second opening flows into the space between the radiation fins of the heat sink, moves along the surface of the light transmitting member, and

wherein water is drained out of the housing through a boundary portion between the light transmitting member and the first opening.

15. The lighting apparatus according to claim 1, wherein the first opening is provided on a lower side of the housing and the second opening is provided on an upper side of the housing opposite the first opening, and the heat sink is provided in the housing and exposed through the second opening.

16. The lighting apparatus according to claim 1, wherein the at least one channel guides water introduced into the housing through the second opening toward a gap between the light transmitting member and the housing in the first space part to be drained through the first opening.

17. A lighting apparatus comprising:

a light emitting unit including an LED module, a heat sink arranged at the rear of the LED module, and a light transmitting member arranged in front of the LED module;

a housing having a first opening in which the light transmitting member is located and a second opening in which the heat sink is located;

an electronic module arranged within the housing to supply power to the LED module, the electronic module surrounded by a wall that is provided a prescribed distance from the heat sink; and

a cable that extends from the wall to the heat sink to electrically connect the LED module of the light emitting unit and the electronic module,

wherein a gap is provided between the light transmitting member and the first opening to drain water introduced into the housing through the second opening to the outside of the housing,

wherein the first opening is opposite to the second opening,

wherein the heat sink includes a main body having a plurality of radiation fins protruding from the rear part of the main body,

wherein the plurality of radiation fins extend toward the second opening, and

wherein the cable includes a first socket screw provided at one end of the cable and a second socket screw provided at the other end of the cable, the first socket screw electrically connecting the cable to the LED module within the heat sink and the second socket screw electrically connecting the cable to the electronic module within the wall.