CN108954036B

CN108954036B - LED lamp end cover and LED lamp using same

Info

Publication number: CN108954036B
Application number: CN201710384167.6A
Authority: CN
Inventors: 王大振; 楚俊贤; 曹锦麟
Original assignee: Carent Lighting Solutions Co ltd
Current assignee: Carent Lighting Solutions Co ltd
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2021-07-23
Anticipated expiration: 2037-05-26
Also published as: CN108954036A; WO2018217324A8; WO2018217324A1

Abstract

The invention provides an LED lamp end cover and an LED lamp using the same. The end cover of the LED lamp comprises an end cover shell, wherein an inner cavity is formed in the end cover shell, at least one contact pin is arranged on the outer surface of the end cover shell, and at least one hole is formed in the end cover shell; and the clapboard is positioned in the inner cavity of the end cover shell and divides the inner cavity of the end cover shell into a first inner cavity and a second inner cavity, wherein the first inner cavity is used for accommodating at least one part of the LED driving module of the connecting pin and is used for filling packaging materials for heat dissipation, and at least one hole is used for communicating the second inner cavity with the outer space of the end cover shell.

Description

LED lamp end cover and LED lamp using same

Technical Field

The invention relates to an LED (light emitting diode) lamp, in particular to an end cover structure of the LED lamp.

Background

LED light sources are characterized by high efficiency, environmental friendliness and long life span compared to conventional light sources, and thus they are becoming the dominant lighting solutions for reducing energy consumption for indoor and outdoor lighting.

In the process of converting from the traditional light source to the LED light source, the heat dissipation problem of the LED is more and more important. Because the lighting device using the conventional light source, especially the tubular lighting device, has a small space, it is difficult to rapidly conduct heat. The light attenuation and the service life of the LED are directly related to the junction temperature, the junction temperature is high when the heat dissipation is poor, and the service life is short.

In particular, in a tubular lighting device having a relatively small diameter, such as T5, a large amount of heat is generated and accumulated inside the lamp tube by the driving unit and the heating elements such as LED elements, which greatly affects the lifetime of the light source.

Therefore, there is a need to provide a solution to the above-mentioned heat dissipation problem of LED by simply improving the structure of the end cap without changing the main structure and material of the lighting device.

Disclosure of Invention

One aspect of the invention provides an LED lamp end cap. The end cover of the LED lamp comprises an end cover shell, wherein an inner cavity is formed in the end cover shell, at least one contact pin is arranged on the outer surface of the end cover shell, and at least one hole is formed in the end cover shell; and the clapboard is positioned in the inner cavity of the end cover shell and divides the inner cavity of the end cover shell into a first inner cavity and a second inner cavity, wherein the first inner cavity is used for accommodating at least one part of the LED driving module of the connecting pin and is used for filling packaging materials for heat dissipation, and at least one hole is used for communicating the second inner cavity with the outer space of the end cover shell.

Another aspect of the present invention is to provide an LED lamp. The LED lamp comprises an LED tube body, an LED module, an LED driving module and a pair of end covers. At least a part of the LED module is accommodated in the LED tube body, and the LED module comprises at least one printed circuit board and at least one LED unit arranged on the surface of the printed circuit board. The LED driving module is coupled to the LED module. The pair of end covers are respectively coupled at two ends of the LED tube body in a connecting mode, wherein at least one end cover comprises an end cover shell, an inner cavity is formed in the end cover shell, at least one contact pin is arranged on the outer surface of the end cover shell, and at least one hole is formed in the end cover shell; and the clapboard is positioned in the inner cavity of the end cover shell and divides the inner cavity of the end cover shell into a first inner cavity and a second inner cavity, wherein the first inner cavity is used for accommodating at least one part of the LED driving module of the connecting pin and is used for filling packaging materials for heat dissipation, and at least one hole is used for communicating the second inner cavity with the outer space of the end cover shell.

The invention aims to realize the heat dissipation and ventilation functions of all elements of the LED lamp and prolong the service life of the LED lamp by simply improving the structure of the end cover.

Drawings

The invention may be better understood by describing embodiments thereof in conjunction with the following drawings, in which:

FIG. 1 is a perspective view of one embodiment of an LED lamp of the present invention.

Fig. 2 is a partial perspective view of the LED lamp shown in fig. 1.

FIG. 3 is a perspective view of one embodiment of an end cap of the LED lamp shown in FIG. 1.

Fig. 4a is a front view of the LED lamp end cap shown in fig. 3.

Fig. 4b is a side view of the LED lamp end cap shown in fig. 3.

FIG. 5 is a cross-sectional view A-A of the LED lamp end cap of FIG. 4B.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Fig. 1 and 2 show a perspective view and a partial perspective view, respectively, of one embodiment of an LED lamp 10. As shown in fig. 1 and 2, the LED lamp 10 includes an LED tube 11, an LED module 17 at least partially housed inside the LED tube 11,

LED driving modules

19 and 21 coupled to the LED module 17, and a pair of

end caps

13 and 15 coupled to two ends of the LED tube 11, respectively. The length and diameter of the LED tube 11 are selected according to the model and application of the LED lamp 10. The LED module 17 includes a printed circuit board 171 and at least one LED unit 173 disposed on the surface of the printed circuit board 171, and the LED module 17 is fixed to the LED tube 11 by an adhesive or a fastener, which includes but is not limited to a snap, a sliding groove, and the like. In some embodiments, the pcb 171 may be a one-piece structure or a plurality of pcbs assembled together. In some embodiments, the LED units 173 may be mounted on one surface of the printed circuit board 171, or may be mounted on both the front and back surfaces of the printed circuit board 171.

As shown in fig. 2, the LED driving module 19 is housed in the end cover 13. In some embodiments, because of the different lengths of the end caps 13 and the different lengths of the different types of LED driving modules 19, the LED driving modules may be only partially accommodated in the end caps 13. In some embodiments, the LED driver module 19 received in the end cap 13 and the LED driver module 21 received in the end cap 15 are the same. In some embodiments, the LED driver module 21 and the LED driver module 19 are not identical. In some embodiments, the LED lamp 10 includes only one

LED driver module

19 or 21.

In some embodiments, the

end caps

13 and 15 have the same or similar structure, and we take the end cap 13 as an example to specifically describe the structure of the end cap of the LED lamp.

Fig. 3, 4a and 4b show a perspective view, a front view and a side view, respectively, of an embodiment of an LED lamp end cap 13.

As shown in fig. 3, 4a and 4b, end cap 13 includes end cap housing 130, two prongs 137 (also referred to as Pin prongs), three vents 136 and a septum 135. The end cap housing 130 includes an end face 131 and an annular tube portion 132. The pins 137 are mounted on the end surface 131, penetrate through the end surface 131, extend outward along a direction perpendicular to the end surface 131, are combined with an external power socket or a lamp tube seat, and extend inward to the inside of the end cover 13 to be connected with the LED driving module 19. The LED driver module 19 may be powered from a power outlet or socket via the pins 137. In some embodiments, the pins 137 are connected to the LED driving module 19, the LED driving module 19 and the LED module 17 by wires, respectively. In other embodiments, other electrical connector connections known to those skilled in the art may be employed.

Fig. 5 is a cross-sectional view a-a of the LED lamp end cap 13 of fig. 4 b. As shown in fig. 3 and 5, the annular tube portion 132 of the end cap housing 130 includes a first portion 133 and a second portion 134 separated by a boss 138, and in some embodiments, the boss 138 is annular for supporting and fixedly coupling the LED body 11 inside the end cap 13. In some embodiments, first portion 133 may further include an external boss 142 to support and secure end cap 13 to an external power outlet or light socket. A partition 135 is located within the interior cavity of the end cap housing 130 for dividing the interior cavity of the end cap housing 130, particularly the interior cavity formed by the end face 131 and the first portion 133, into a first interior cavity 139 and a second interior cavity 140. In some embodiments, an end portion of the pin 137 mounted on the end surface 131 of the end cap housing 130 is received in the first inner cavity 139, and the LED driving module 19 electrically connected to the pin 137 is also received or partially received in the first inner cavity 139. The three ventilation holes 136 are used for communicating the second inner cavity 140 with the external space of the end cover shell 130, and play roles of ventilation and heat dissipation. In some embodiments, the LED module 17 is fixed to the LED tube by an adhesive, and during the operation of the LED, the generated heat makes the adhesive volatilize into the LED tube 11, and these volatile organic compounds can reduce the lifetime of the LED unit 173, so the ventilation hole 136 also plays a role of exhausting the volatile organic compounds. The number of the ventilation holes is not limited to three, and the number of the ventilation holes can be increased or decreased according to the ventilation and heat dissipation requirements of different light sources.

In the embodiment shown in fig. 5, the partition 135 and the end cover housing 130 are formed by integrally molding. The partition 135 extends from the end face 131 toward the inside of the end cap 13 along the axis 101, and extends to be flush with the boss 138 or not beyond the boss 138, so as to avoid affecting the installation of the LED tube 11. In some embodiments, the partition 135 and the end cap housing 130 are separately machined and then assembled such that one end of the partition 135 is sealingly coupled to the end face 131 and the other end extends to separate the first interior cavity 139 and the second interior cavity 140. for example, a pair of symmetrical retaining slots may be provided within the end cap housing 130 to receive the ends of the partition 135 and thereby retain the partition 135. The spacer 135 and end cap housing 130 materials may be selected from, but are not limited to, Polycarbonate (PC), polybutylene terephthalate (PBT) and other easily processable plastics and combinations thereof.

In some embodiments, the partition 135 may be made of more than one plate to divide the inner cavity of the first portion 133 into more than two inner spaces, and the shape of the partition is not limited to a rectangle, but may be other shapes that can be connected with the inner surface of the end cover housing 130 in a sealing manner, which is known to those skilled in the art.

How to achieve better ventilation and heat dissipation of the LED lamp by using the improved end cap 13 with the partition 135 will be described below with reference to fig. 2, 3 and 5 through a method for mounting the end cap 13 of the LED lamp 10.

A. The LED driving module 19 is fully or at least partially received in the first inner cavity 139 of the end cap 13, and the LED driving module 19 is electrically connected to the pins 137.

B. The end cap 13 is placed with its opening facing upward and perpendicular to the ground, the potting material is filled in the first cavity 139 so as to cover at least a part of the LED driving module 19, and the height of the potting material filled in the first cavity 139 accommodating the LED driving module 19 does not exceed the partition 135 in the direction along the axis 101 of the end cap housing 130 so as to prevent the potting material from overflowing to the second cavity 140. The encapsulant material is selected from thermosetting, thermally conductive adhesives including, but not limited to, acrylates, vinyl ester resins, epoxies, phenolics, polyurethanes, and combinations thereof. The potting of the thermally conductive paste may better and faster spread the heat generated by the LED driver module 19 to the end cap housing 130 and the external environment.

C. After the encapsulant material is substantially cured, the LED module 17 is partially received in the second interior cavity 140. In the embodiment shown in fig. 3, the second interior cavity 140 also houses a pair of supports 141 mounted on the interior surface of the end cap housing 130 for positioning the LED module 17. The second interior cavity 140 is free of potting material and communicates with the exterior space through the vent hole 136. The LED module 17 housed in the second inner cavity 140 is connected to the LED driving module 19 by a wire.

D. The LED tube 11 is butted against the end cap 13, that is, the end of the LED tube 11 is fixed in the second portion 134 of the end cap 13.

In this embodiment, the end caps 15 and 13 have the same structure, the method of mounting the LED driving element 21 is the same as that in step a, and the connection between the LED module 17 and the LED tube 11 and the end caps 13 and 15 may be performed simultaneously or sequentially. In some embodiments, end cap 15 and end cap 13 are different in structure. For example, the end cap 15 may not include a spacer structure, the LED driving element structure of the end cap 15 may be different, etc.

In summary, it can be seen that, by simply improving the structure of the end cover, that is, adding the partition plate, the invention can improve the heat dissipation and ventilation functions of each element of the LED lamp, and prolong the service life of the LED lamp.

While the invention has been described in conjunction with specific embodiments thereof, it will be understood by those skilled in the art that many modifications and variations may be made to the invention. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the invention.

Claims

1. An LED lamp end cap, comprising:

the end cover comprises an end cover shell, a connecting rod and a connecting rod, wherein an inner cavity is formed in the end cover shell, at least one contact pin is arranged on the outer surface of the end cover shell, and at least one hole is formed in the end cover shell; and

the baffle is located the inner chamber of end cover shell will the inner chamber of end cover shell is separated into first inner chamber and second inner chamber, wherein:

the first inner cavity is used for accommodating at least one part of the LED driving module connected with the at least one contact pin and is filled with packaging materials for heat dissipation; and

the at least one hole is used for communicating the second inner cavity and the outer space of the end cover shell.

2. The end closure of claim 1, wherein: the separator and the end cap housing are integrally formed, and the material of the separator and the end cap housing is selected from Polycarbonate (PC), polybutylene terephthalate (PBT) and a combination thereof.

3. The end closure of claim 1, wherein: the end cover shell comprises an end face part and an annular pipe part, the annular pipe part comprises a first part and a second part, the first inner cavity and the second inner cavity which are separated by the partition plate are formed in the end face part and the first part of the annular pipe part, and a boss is further arranged between the first part and the second part.

4. The end closure of claim 1, wherein: the at least one contact pin comprises two contact pins, the contact pins are mounted at one end of the end cover shell and are contained in the first inner cavity, and the at least one hole comprises three holes.

5. An LED lamp, comprising:

an LED tube body;

the LED module is at least partially accommodated in the LED tube body and comprises at least one printed circuit board and at least one LED unit arranged on the surface of the printed circuit board;

an LED driving module coupled to the LED module; and

a pair of end caps respectively coupled to two ends of the LED tube, wherein at least one of the end caps comprises:

6. The LED lamp of claim 5, wherein: the end cover shell comprises an end face part and an annular pipe part, the annular pipe part comprises a first part and a second part, a first inner cavity and a second inner cavity which are separated by the partition plate are formed in the end face part and the first part of the annular pipe part, the second part is used for being connected with the LED pipe body, and a boss is further arranged between the first part and the second part.

7. The LED lamp of claim 6, wherein: one end of the baffle plate is hermetically coupled to the end face portion of the end cap housing, and the other end of the baffle plate is flush with the boss.

8. The LED lamp of claim 7, wherein: the height of the packaging material filled in the first inner cavity for accommodating the LED driving module does not exceed the partition plate in the direction along the axis of the end cover shell.

9. The LED lamp of claim 5, wherein: the LED module is fixed on the LED tube body, and one end of the LED module is contained in the second inner cavity of the end cover.

10. The LED lamp of claim 5, wherein: the encapsulating material is selected from the group consisting of acrylates, vinyl ester resins, epoxies, phenolics, polyurethanes, and combinations thereof.