LED tube lamp

• US 9,611,984 B2
• Filed: 08/04/2015
• Issued: 04/04/2017
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Chen, Shau-Liang, Wang, Ding-Kai, Jiang, Tao, Jiang, Wen-Jang
• Primary Examiner(s): Lee, Jong-Suk (James)
• Assistant Examiner(s): TUMEBO, TSION M
• Application Number:
  US14/818,224
• Publication Number:
  US 20160290569A1
• Time in Patent Office: 609 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: 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 11/30 End pieces held in contact by a magnet
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet

Abstract

An LED tube lamp having an end cap and a lamp tube is disclosed. The end cap includes an electrically insulating tubular part, sleeved with an end of the lamp tube, and a magnetic metal object disposed between an inner circumferential surface of the electrically insulating tubular part and the end of lamp tube. The electrically insulating tubular part having an inner circumferential surface with a plurality of protruding portions formed thereon and extending inwardly in a radial direction of the electrically insulating tubular part. Each of the protruding portions is disposed between an outer circumferential surface of the magnetic metal member and the inner circumferential surface of the electrically insulating tubular part, thereby forming a space therebetween, in which a hot melt adhesive is filled so that the end cap and the end of the lamp tube are adhesively bonded.

Claims

1. An LED tube lamp, comprising:

a lamp tube; and

an end cap, configured to be attached with an end of the lamp tube, comprising;

an electrically insulating tubular part, sleeved with the end of the lamp tube, the electrically insulating tubular part having an inner circumferential surface with a plurality of protruding portions formed thereon and extending inwardly in a radial direction of the electrically insulating tubular part; and

a magnetic metal member, fixedly disposed between the protruding portions of the inner circumferential surface of the electrically insulating tubular part of the end cap and the end of the lamp tube, wherein each of the protruding portions is disposed between an outer circumferential surface of the magnetic metal member and the inner circumferential surface of the electrically insulating tubular part, thereby forming a space therebetween.

2. An LED tube lamp, comprising:

a lamp tube; and

two end caps, each configured to be attached with an end of the lamp tube, and each comprising;

an electrically insulating tubular part, sleeved with the respective end of the lamp tube, the electrically insulating tubular part having an inner circumferential surface with a plurality of protruding portions formed thereon and extending inwardly in a radial direction of the electrically insulating tubular part; and

a magnetic metal member, fixedly disposed between the protruding portions of the inner circumferential surface of the electrically insulating tubular part of the end cap and an outer circumferential surface of the end of the lamp tube,

wherein the lamp tube includes a main region, a transition region and an end region, the transition region being arc-shaped at both ends, one 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.

3. The LED tube lamp of claim 2, wherein each of the protruding portions is disposed between an outer circumferential surface of the magnetic metal member and the inner circumferential surface of the electrically insulating tubular part, thereby forming a space therebetween.

4. The LED tube lamp of claim 3, wherein a hot melt adhesive is contained in the space.

5. The LED tube lamp of claim 2, wherein the one end cap and the respective end of the lamp tube are adhesively bonded.

6. The LED tube lamp of claim 5, wherein the one end cap and the end of the lamp tube are adhesively bonded together by a hot melt adhesive.

7. The LED tube lamp of claim 6, wherein the magnetic metal member is disposed inside the electrically insulating tubular part of the one end cap, and the hot melt adhesive is coated over an entire inner surface of the magnetic metal member.

8. The LED tube lamp of claim 2, wherein a thickness of each of the protruding portions of the electrically insulating tubular part is between 0.2 mm and 1 mm.

9. The LED tube lamp of claim 8, wherein each of the protruding portions is formed along the inner circumferential surface of the electrically insulating tubular part to be arranged in a ring configuration, and the number of the protruding portions are more than one, to be spatially arranged along the inner circumferential surface of the electrically insulating tubular part.

10. The LED tube lamp of claim 9, wherein the protruding portions are arranged in a circumferential direction at an equidistantly spaced distance along the inner circumferential surface of the electrically insulating tubular part, respectively.

11. The LED tube lamp of claim 9, wherein the protruding portions are arranged in a circumferential direction at a plurality of non-equidistantly spaced distances along the inner circumferential surface of the electrically insulating tubular part.

12. The LED tube lamp of claim 2, wherein an inside diameter of the magnetic metal member is larger than an outer diameter of the end of the lamp tube.

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

14. The LED tube lamp of claim 13, wherein the size of one end cap is 30%-80% of the size of the other end cap.

15. An LED tube lamp, comprising:

a lamp tube; and

an end cap, configured to be attached with the end of the lamp tube, comprising;

an electrically insulating tubular part, sleeved with the end of the lamp tube, the electrically insulating tubular part having an inner circumferential surface with a plurality of protruding portions formed thereon and extending inwardly in a radial direction of the electrically insulating tubular part; and

a magnetic object, disposed between the protruding portions of the inner circumferential surface of the electrically insulating tubular part of the end cap and an outer circumferential surface of the end of the lamp tube.

16. The LED tube lamp of claim 15, wherein each of the protruding portions is disposed between an outer circumferential surface of the magnetic object and the inner circumferential surface of the electrically insulating tubular part, thereby forming a space therebetween.

17. The LED tube lamp of claim 16, wherein a hot melt adhesive is contained in the space.

18. The LED tube lamp of claim 15, wherein the end cap and the end of the lamp tube are adhesively bonded.

19. The LED tube lamp of claim 18, wherein the end cap and the end of the lamp tube are adhesively bonded together by a hot melt adhesive.

20. The LED tube lamp of claim 15, wherein a thickness of each of the protruding portions of the electrically insulating tubular part is between 0.2 mm and 1 mm.