LED LAMP HAVING A LOCKING DEVICE

• US 20100103675A1
• Filed: 10/27/2008
• Published: 04/29/2010
• Est. Priority Date: 10/27/2008
• Status: Abandoned Application

• Current Assignee: Edison Opto Corporation
• Original Assignee: Edison Opto Corporation
• Inventors: Yu, Hung-Wen, Li, Hsin-Ming
• Application Number:
  US12/258,617
• Publication Number:
  US 20100103675A1
• Time in Patent Office: Days
• US Class Current: 362/253
• CPC Class Codes: F21K 9/23 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 Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A LED lamp having a locking device includes a lamp housing, a heat-sink, a locking device and a LED light-emitting module. The lamp housing has a cylinder. The heat-sink is formed with an annular wall. The locking device comprises a first thread formed at an outer periphery of the cylinder, a hook extending from one end of the cylinder, a second thread formed in the inner wall of the annular wall and threadedly connected with the first thread, and a groove defined on the annular wall and locked with the hook. The LED light-emitting module is placed in the heat-sink and connected to an end of the heat-sink away from the lamp housing. By the above arrangement, a secure and firm connection between the lamp housing and the heat-sink can be achieved.

Claims

1. A LED lamp having a locking device, comprising:

a lamp housing having a cylinder;

a heat-sink formed with an annular wall;

a locking device having a first thread formed at an outer periphery of the cylinder, a hook extending from one end of the cylinder, a second thread formed in an inner wall of the annular wall and threadedly connected with the first thread, and a groove provided on the annular wall and locked with the hook; and

a LED light-emitting module placed in the heat-sink and connected to an end of the heat-sink away from the lamp housing.

2. The LED lamp having a locking device according to claim 1, wherein the lamp housing further comprises a copper head connected to the cylinder.

3. The LED lamp having a locking device according to claim 1, wherein the cylinder is an insulator.

4. The LED lamp having a locking device according to claim 1, wherein the first thread is an outer thread, and the second thread is an inner thread matching with the outer thread.

5. The LED lamp having a locking device according to claim 1, wherein an outer peripheral surface of the annular wall protrudes to form a plurality of heat-sink fins, central portions of the heat-sink fins surrounding to each other to define an accommodating space, and the LED light-emitting module is received in the accommodating space.

6. The LED lamp having a locking device according to claim 1, further comprising an elastic gasket, sandwiched between the flange formed on cylinder and the annular plane formed between the annular wall of heat-sink and the cylinder.

7. The LED lamp having a locking device according to claim 6, wherein the elastic gasket is made of rubber.

8. The LED lamp having a locking device according to claim 1, further comprising a cover connected at one end of the heat-sink away from the lamp housing.

9. The LED lamp having a locking device according to claim 8, wherein the cover comprises an annular plate and an encircling plate bent from the periphery of the annular plate, the interior of the annular plate and the encircling plate forms a clamping plate, the outer peripheral surface of the annular wall protrudes to form a heat-sink fin that is inserted in the clamping plate.

10. The LED lamp having a locking device according to claim 9, wherein a groove is defined on the heat-sink fin, and the inner wall of the encircling plate extends to form a buckling bars for buckling to the groove.