LED tube lamp

Patent metadata

Field	Value
Publication number	US-9927071-B2
Application number	US-201715492486-A
Country	US
Kind code	B2
Filing date	Apr 20, 2017
Priority date	Sep 28, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

An LED tube lamp comprises a plurality of LED light sources, two end caps, a lamp tube, and an LED light strip. The lamp tube extends in a first direction along a length of the lamp tube, and has two ends respectively sleeved to the end caps. The LED light strip is disposed inside the lamp tube, and the LED light sources are on the LED light strip. Each end cap comprises an electrically insulating tube and a magnetic metal member. The magnetic metal member is fixedly on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube. The LED tube lamp further comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

First claim

What is claimed is:

1. An LED tube lamp, comprising:
a plurality of LED light sources;
two end caps;
a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;
an LED light strip disposed inside the lamp tube, and the plurality of the LED light sources being on the LED light strip;
wherein each of the end caps comprises:
an electrically insulating tube; and
a magnetic metal member, on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube; and
the LED tube lamp comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

2. The LED tube lamp as claimed in claim 1 , wherein the magnetic metal member is partially overlapped with the lamp tube in the radial direction.

3. The LED tube lamp as claimed in claim 1 , wherein the whole magnetic metal member is inside the electrically insulating tube.

4. The LED tube lamp as claimed in claim 1 , wherein the magnetic metal member includes at least one opening.

5. The LED tube lamp as claimed in claim 1 , wherein the magnetic metal member includes an indentation depressed under the inner surface of the magnetic metal member.

6. The LED tube lamp as claimed in claim 1 , wherein the magnetic metal member includes an embossment is raised from the inner surface of the magnetic metal member.

7. The LED tube lamp as claimed in claim 1 , wherein the electrically insulating tube is divided into a first tubular part and a second tubular part, an inner diameter of the first tubular part for supporting the magnetic metal member is larger than the inner diameter of the second tubular part, and a stepped structure is formed at the connection of the first tubular part and the second tubular part.

8. The LED tube lamp as claimed in claim 1 , wherein the electrically insulating tube further comprises a supporting portion on the inner surface of the electrically insulating tube to be extending inwardly, and the magnetic metal member is axially abutted against an upper edge of the supporting portion.

9. The LED tube lamp as claimed in claim 8 , wherein the electrically insulating tube further comprises a protruding portion on the inner surface of the electrically insulating tube to be extending inwardly, and the magnetic metal member is radially abutted against a side edge of the protruding portion and the outer surface of the magnetic metal member and the inner surface of the electrically insulating tube is spaced apart with a gap.

10. The LED tube lamp as claimed in claim 9 , wherein the protruding portion and the supporting portion are connected along the axial direction and the magnetic metal member is axially abutted against the upper edge of the supporting portion while radially abutted against the side edge of the protruding portion.

11. The LED tube lamp as claimed in claim 10 , wherein the protruding portion is arranged along the circumferential direction of the electrically insulating tube to have a circular configuration.

12. The LED tube lamp as claimed in claim 10 , wherein the protruding portion is in the form of a plurality of bumps arranged on the inner surface of the electrically insulating tube.

13. The LED tube lamp as claimed in claim 1 , further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.

14. An LED tube lamp, comprising:
a plurality of LED light sources;
two end caps, each comprising an electrically insulating tube;
a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;
an LED light strip disposed inside the lamp tube, and the plurality of the LED light sources being on the LED light strip;
wherein the LED tube lamp comprises a hot melt adhesive including permeability powders and, the hot melt adhesive is coated on the inner surface of the end cap and adhere the end cap and the lamp tube.

15. The LED tube lamp as claimed in claim 14 , wherein a relative permeability of the permeability powder ranges from about 10 2 to about 10 6 .

16. The LED tube lamp as claimed in claim 14 , wherein the permeability powders is iron, nickel, cobalt, alloy, or any combination thereof.

17. The LED tube lamp as claimed in claim 16 , wherein the weight percentage of the permeability powders with respect to the hot melt adhesive is about 10% to about 50%.

18. The LED tube lamp as claimed in claim 16 , wherein the powders has mean particle size of about 1 to about 30 μm.

19. The LED tube lamp as claimed in claim 14 , wherein the permeability powders is uniformly distributed in the hot melt adhesive.

20. The LED tube lamp as claimed in claim 14 , wherein the permeability powders is random distributed in the hot melt adhesive.

21. The LED tube lamp as claimed in claim 14 , further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.

22. An LED tube lamp, comprising:
a plurality of LED light sources;
two end caps;
a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;
an LED light strip on the inner circumferential surface of the lamp tube and having an end portion extending inside one of the end caps, and the plurality of the LED light sources being on the LED light strip;
wherein each of the end caps comprises:
an electrically insulating tube; and
a magnetic metal member, on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube; and
the LED tube lamp comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

23. The LED tube lamp as claimed in claim 22 , further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.

Assignees

• Jiaxing Super Lighting Electric Appliance Co Ltd
• Jiaxing Super Lighting Electric Appliance Co Ltd

Inventors

• Jiang Tao

Classifications

• F21V7/28

  characterised by coatings · CPC title

• H05B45/50

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• H05B45/37

  Converter circuits · CPC title

• F21V3/10

  characterised by coatings · CPC title

• B23K3/047

  electric · CPC title