LED tube lamp

• US 9,618,166 B2
• Filed: 08/04/2015
• Issued: 04/11/2017
• Est. Priority Date: 09/28/2014
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Yang, Xiao-Su, Jiang, Tao, Jiang, Wen-Jang, Chen, Shau-Liang
• Primary Examiner(s): Lee, Jong-Suk (James)
• Assistant Examiner(s): TUMEBO, TSION M
• Application Number:
  US14/818,204
• Publication Number:
  US 20160290568A1
• Time in Patent Office: 616 Days
• Field of Search: 36221712, 36221713, 36221717, 362219, 439230, 439240, 439242, 439 56, 439 38- 40
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet

Abstract

An end cap for LED tube lamp along with the LED tube lamp adopting thereof is disclosed. LED tube lamp includes a lamp tube. One end of the lamp tube is attached to the end cap; a LED light bar is disposed inside the lamp tube. The end cap includes an insulating tubular part, sleeved with the end of the lamp tube and a magnetic object disposed between an inner circumferential surface of the insulating tubular part and the end of the lamp tube. The magnetic object being of a magnetic metal member and the lamp tube are adhesively bonded by a hot melt adhesive. An inner circumferential surface of the magnetic metal member can be fully covered by the hot melt adhesive. Magnetic metal member can be in the structure of a circular or oval ring, with at least one opening, and has indentation structure on a surface thereof.

Claims

1. An LED tube lamp, comprising:

a lamp tube; and

an end cap, comprising;

an electrically insulating tubular part;

a magnetic metal member, disposed on an inner circumferential surface of the electrically insulating tubular part; and

an adhesive disposed on an inner circumferential surface of the magnetic metal member;

wherein the lamp tube includes a main region, a transition region and an end region, the transition region being arc-shaped at both ends has a length of 1 mm to 4 mm, the end cap is sleeved with the end region of the lamp tube, and an outer diameter of the end region is less than an outer diameter of the main region, the outer diameter difference between the end region and the main region is 1 mm to 10 mm, and

wherein the magnetic metal member is for melting the adhesive.

2. An LED tube lamp, comprising:

a lamp tube; and

two end caps, at least a first end cap comprising;

an electrically insulating tubular part;

a magnetic metal member, disposed on an inner circumferential surface of the electrically insulating tubular part; and

an adhesive disposed on an inner circumferential surface of the magnetic metal member;

wherein the lamp tube includes a main region, a transition region and an end region, the transition region being arc-shaped at both ends, the first end cap is sleeved with the end region of the lamp tube, and an outer diameter of the end region is less than an outer diameter of the main region, and

wherein the magnetic metal member is for melting the adhesive.

3. The LED tube lamp of claim 2, wherein the transition region has a length of 1 mm to 4 mm.

4. The LED tube lamp of claim 2, wherein the outer diameter difference between the end region and the main region is 1 mm to 10 mm.

5. The LED tube lamp of claim 2, wherein the sizes of the two end caps are different.

6. The LED tube lamp of claim 5, wherein the size of one end cap is 30%-80% of the size of the other end cap.

7. The LED tube lamp of claim 2, wherein the inner circumferential surface of the magnetic metal member is fully covered by the adhesive.

8. The LED tube lamp of claim 2, wherein the magnetic metal member is a ring.

9. The LED tube lamp of claim 8, wherein the magnetic metal member is a circular ring.

10. The LED tube lamp of claim 8, wherein the magnetic metal member is an oval ring.

11. The LED tube lamp of claim 2, wherein the magnetic metal member contains at least one opening.

12. The LED tube lamp of claim 11, wherein the at least one opening of the magnetic metal member occupies 10% to 50% of the area of the magnetic metal member.

13. The LED tube lamp of claim 11, wherein the at least one opening is a plurality of openings arranged circumferentially around the magnetic metal member in an equidistantly spaced manner.

14. The LED tube lamp of claim 11, wherein the at least one opening is a plurality of openings arranged circumferentially around the magnetic metal member in a not equally spaced manner.

15. The LED tube lamp of claim 2, wherein the magnetic metal member has an indentation structure on a surface thereof.

16. The LED tube lamp of claim 15, wherein the indentation structure of the magnetic metal member protrudes from an inner surface of the magnetic metal member toward an outer surface of the magnetic metal member.

17. The LED tube lamp of claim 15, wherein the indentation structure of the magnetic metal member protrudes from an outer surface of the magnetic metal member toward an inner surface of the magnetic metal member.

18. The LED tube lamp of claim 2, wherein the magnetic metal member is tubular and configured with a same axis of the electrically insulating tubular part of the end cap.

19. The LED tube lamp of claim 2, wherein:

the lamp tube is a glass tube; and

the adhesive is a hot melt adhesive contacting an outer circumferential surface of the glass tube and the inner circumferential surface of the magnetic metal member.

20. The LED tube lamp of claim 19, wherein:

the magnetic metal member is configured to heat up upon being subjected to an electromagnetic field.

21. The LED tube lamp of claim 2, wherein the magnetic metal is configured to heat up upon being subject to an electromagnetic field.