CN216079717U

CN216079717U - Heat radiation lamp

Info

Publication number: CN216079717U
Application number: CN202122168941.4U
Authority: CN
Inventors: 谢建民; 喻银飞; 马湘君
Original assignee: Suzhou Op Lighting Co Ltd
Current assignee: Suzhou Op Lighting Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-03-18
Anticipated expiration: 2031-09-09

Abstract

The utility model provides a heat-dissipation lamp which comprises a light source plate, a shell and a first insulating piece arranged between the light source plate and the shell, wherein the light source plate and the first insulating piece are both contained in the shell, a conducting part communicated with the light source plate and the shell is arranged on the first insulating piece, a second insulating piece with the thermal resistance smaller than that of the first insulating piece is arranged between the light source plate and the first insulating piece, and the light source plate is in heat conduction contact with the shell through the second insulating piece. Compared with the prior art, the heat conduction efficiency can be greatly improved under the condition of ensuring the insulation requirement by arranging the second insulating part with lower thermal resistance at the conduction part of the first insulating part, and meanwhile, the shell is provided with the extending part at the conduction part, so that the heat conduction contact area between the shell and the second insulating part is increased, and the heat dissipation effect of the heat dissipation lamp can be improved.

Description

Heat radiation lamp

Technical Field

The utility model relates to a heat dissipation lamp, and belongs to the technical field of illumination.

Background

The insulation protection is a safety measure for isolating or wrapping a charged body by using a non-conductive substance to protect electric shock, and good insulation is the most basic and reliable means for ensuring the safe operation of electrical equipment and circuits and preventing personal electric shock accidents.

In order to increase the lighting power and reduce the cost of the existing LED lamp, metal is generally adopted as a heat dissipation lamp body, meanwhile, electronic components such as a driving power supply and a light-emitting element are integrated on a PCB substrate and are arranged in the heat dissipation lamp body, and in order to meet the safety requirements, a layer of plastic insulation part is usually arranged between the PCB substrate and the metal lamp body. However, because the thermal conductivity of the plastic is low, the heat generated by the PCB substrate cannot be transferred to the metal lamp body in time, so that the lamp is at a high working temperature for a long time, and the service life of the lamp is affected.

In view of the above, there is a need to improve the conventional heat dissipating lamp to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a heat dissipation lamp, which improves the heat dissipation efficiency of the lamp.

In order to achieve the above object, the present invention provides a heat dissipation lamp, including a light source board, a housing, and a first insulating member disposed between the light source board and the housing, where the light source board and the first insulating member are both accommodated in the housing, the first insulating member is provided with a conducting portion for communicating the light source board and the housing, a second insulating member having a thermal resistance smaller than that of the first insulating member is further disposed between the light source board and the first insulating member, and the light source board is in heat conduction contact with the housing through the second insulating member.

As a further improvement of the present invention, the housing includes an extending portion, and the extending portion passes through the conduction portion and is in direct thermal conductive contact with the second insulating member.

As a further improvement of the present invention, the second insulating member partially penetrates the conduction portion and is in direct heat-conductive contact with the housing.

As a further improvement of the present invention, the first insulating member includes a bottom wall and a side wall surrounding the bottom wall, and the bottom wall and the side wall enclose a cavity for accommodating the light source board.

As a further improvement of the present invention, a first clamping structure is disposed between the side wall and the housing, and the first insulating member is clamped to the inner side of the housing by the first clamping structure and abuts against the inner side of the housing.

As a further improvement of the present invention, the second insulating member is a polyimide film.

As a further improvement of the utility model, a light source module is arranged on the light source plate, and an optical module abutting against the light source plate is arranged on the outer side of the light source module.

As a further improvement of the present invention, the optical module further includes a pressing cover, the optical module is partially accommodated in the pressing cover and abuts against the pressing cover, a second clamping structure is disposed between the pressing cover and the housing, the pressing cover is fixed to the housing through the second clamping structure, and pushes the optical module to abut against the light source plate, so that the light source plate has a tendency of moving toward the housing.

As a further improvement of the present invention, a wire hole is formed in the housing, a wire is formed in the light source board, and the wire passes through the first insulating member and passes through the wire hole.

As a further improvement of the utility model, the outer side of the shell is provided with the heat dissipation fins, and a heat dissipation air duct which forms convection with the external environment is arranged between every two adjacent heat dissipation fins.

The utility model has the beneficial effects that: according to the utility model, the second insulating part with lower thermal resistance is arranged at the conduction part of the first insulating part, so that the heat conduction efficiency can be greatly improved under the condition of ensuring the insulation requirement, and meanwhile, the shell is provided with the extension part at the conduction part, so that the heat conduction contact area with the second insulating part is increased, and the heat dissipation effect of the heat dissipation lamp can be improved.

Drawings

Fig. 1 is an exploded view of a heat dissipating lamp according to a preferred embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a heat dissipation lamp according to a preferred embodiment of the utility model.

Fig. 3 is an enlarged view at a in fig. 2.

Reference numerals:

100. a heat-dissipating lamp;

10. a housing; 11. heat dissipation fins; 111. a heat dissipation air duct; 12. an extension portion; 13. a first clamping structure; 14. a second clamping structure;

20. an insulating assembly; 21. a first insulating member; 211. a conduction part; 212. a bottom wall; 213. a side wall; 214. a cylindrical portion; 22. a second insulating member;

30. a light source assembly; 31. a light source plate; 32. a light source module; 33. an optical module;

40. a gland; 41. an abutment portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 3, the present invention discloses a heat dissipating lamp 100, wherein the heat dissipating lamp 100 is provided with an insulating assembly 20 for preventing the housing 10 of the lamp from being electrified. For clarity of description, the following description section will describe the specific structure of the heat sink lamp 100 in detail.

As shown in fig. 1, the heat-dissipating lamp 100 includes a housing 10, an insulating member 20, a light source assembly 30, and a cover 40, wherein the insulating member 20 and the light source assembly 30 are disposed in the housing 10, and the insulating member 20 is disposed between the light source assembly 30 and the housing 10. Specifically, the housing 10 is formed with a cavity for accommodating the insulating member 20 and the light source assembly 30, the insulating member 20 is fixed in the cavity of the housing 10, the insulating member 20 is formed with a cavity for accommodating a portion of the light source assembly 30, and the insulating member 20 is used for preventing the light source assembly 30 from leaking to the housing 10. The other part of the light source assembly 30 is accommodated in the pressing cover 40, and the housing 10 and the pressing cover 40 are fixed by snap fit, so that the housing 10, the insulating assembly 20 and the light source assembly 30 are fixed in mutual abutment.

The pressing cover 40 has an opening for the light emitting of the light source assembly 30, and the opening is provided with a contact portion 41 extending toward the light source assembly 30 and preventing the light source assembly 30 from coming out of the opening. Further, a diffusion plate is disposed at the opening, and the diffusion plate is used for interfering the light emitted by the light source assembly 30, so that the light is softer.

As a preferred embodiment of the present invention, the light source assembly 30 includes a light source board 31, a light source module 32 and an optical module 33, the light source board 31 is a PCB aluminum light source board, the light source module 32 can be led lamp beads and is electrically connected to the light source board 31, the optical module 33 is disposed outside the light source module 32, the optical module 33 includes a lens and a reflector cup, the lens is fixedly disposed in the reflector cup, a light-entering end of the reflector cup covers the outside of the light source module 32 and abuts against the light source board 31, and a light-exiting end of the reflector cup is disposed at an opening of the pressing cover 40 and abuts against the abutting portion 41.

The insulation assembly 20 includes a first insulation member 21 and a second insulation member 22, wherein the first insulation member 21 is disposed between the housing 10 and the light source board 31 and abuts against the housing 10 and the light source board 31, respectively, so as to substantially prevent the housing 10 from making electrical contact with the light source board 31, and to better transfer heat generated by the light source board 31 to the housing 10 for heat dissipation.

As shown in fig. 2 and 3, in particular, the first insulating member 21 includes a bottom wall 212 and a side wall 213, the side wall 213 is disposed around the bottom wall 212 and extends toward a side away from the housing 10, and the bottom wall 212 and the side wall 213 enclose to form a cavity for accommodating the light source board 31. Preferably, the housing 10 is made of metal for better heat conduction, the first insulating member 21 is made of plastic, and the thickness of the first insulating member 21, i.e. the thickness of the bottom wall 212, is preferably 1mm, and the specific thickness can be set according to the requirement, which is not limited herein.

In a preferred embodiment of the present invention, a first clamping structure 13 is disposed outside the side wall 213 and is matched with the housing 10, the first clamping structure 13 specifically includes a first clamping hook (not numbered) disposed on the side wall 213 and a first clamping slot (not numbered) disposed on the housing 10, and the first clamping hook is clamped in the first clamping slot, so that the first insulating member 21 abuts against the inner side of the housing 10. The first hook has a guiding structure so that the first insulating member 21 can be smoothly clamped into the housing 10. In other embodiments of the present invention, the first hook may also be disposed on the housing 10, and the first slot may also be disposed on the sidewall 213, which is not limited herein.

Further, a conducting portion 211 is opened in the bottom wall 212 of the first insulating member 21, two sides of the conducting portion 211 are the light source board 31 and the housing 10 respectively, and the light source board 31 and the housing 10 are communicated through the conducting portion 211, preferably, the second insulating member 22 is disposed between the light source board 31 and the first insulating member 21 and covers the conducting portion 211, such that at least the first insulating member 21 or the second insulating member 22 is disposed between the light source board 31 and the housing 10, and the light source board 31 is in heat conductive contact with the housing 10 through the first insulating member 21 and/or the second insulating member 22. In other embodiments of the present invention, the second insulating member 22 may also partially penetrate through the conduction portion 211 and directly contact with the housing 10 in a heat conducting manner, and the second insulating member 22 increases a contact area between the first insulating member 21 and the housing 10, so as to enhance heat conducting efficiency. Specifically, the second insulating member 22 is a PI film, i.e., a polyimide film having a thermal conductivity of 0.5W/deg.c, a reduced thermal resistance of about 0.0001m ^ 2K/W, and a thermal resistance per unit area of the polyimide film of about 0.02 of that of the first insulating member 21, indicating that the thermal resistance of the second insulating member 22 is much smaller than that of the first insulating member 21, i.e., the thermal conductivity of the second insulating member 22 is good. On the other hand, the polyimide film has good heat resistance, can be kept at 200-300 ℃ for a long time, has the dielectric strength of 100-300 kV/mm, and can meet the requirement of reinforcing insulation required by safety regulations. The thickness of the second insulating member 22 is preferably 0.05mm, and the specific thickness can be set according to the requirement without any limitation.

As shown in fig. 1, in a preferred embodiment of the present invention, the housing 10 includes heat dissipation fins 11 for dissipating heat, and a heat dissipation air duct 111 forming convection with the external environment is disposed between two adjacent heat dissipation fins 11. The heat sink fin 11 is disposed at one end of the housing 10 away from the pressing cover 40, and the other end of the housing 10 facing the pressing cover 40 is disposed with an extending portion 12, the extending portion 12 extends from a contact surface contacting the first insulating member 21 toward the guiding portion and completely fills the whole guiding portion, i.e., the extending portion 12 passes through the conduction portion 211 and directly contacts with the second insulating member 22 in a heat conduction manner, and the extending portion 12 and the inner side surface of the first insulating member 21 form a plane in contact with the second insulating member 22. This is provided to maximize a contact area of the case 10 with the first insulating member 21 or the second insulating member 22 to enhance heat dissipation efficiency.

A second clamping structure 14 is arranged between the gland 40 and the casing 10, the second clamping structure 14 specifically includes a second hook (not numbered) arranged on the outer side of the gland 40 and a second clamping groove (not numbered) arranged on the inner side of the casing 10, and the second hook is clamped in the second clamping groove so that the gland 40 is abutted against the inner side of the casing 10. The second hook has a guiding structure so that the pressing cover 40 can be smoothly clamped into the housing 10. In other embodiments of the present invention, the second hook may also be disposed inside the housing 10, and the second locking groove may also be disposed outside the pressing cover 40, which is not limited herein.

In the above embodiment, the housing 10, the first insulating member 21, the second insulating member 22, the light source board 31, the reflective cup and the pressing cover 40 are sequentially abutted, and after the pressing cover 40 and the housing 10 are mutually clamped, the pressing cover 40 pushes the reflective cup to abut against the light source board 31, so that the light source board 31 has a tendency of moving towards the housing 10, that is, the light source board 31 is pressed towards the housing 10, and then the first insulating member 21 and the second insulating member 22 are pressed, so as to improve the efficiency of heat dissipation of the light source board 31 towards the housing 10.

The housing 10 is further provided with a wire hole (not shown), the light source board 31 is provided with a wire, the wire is a power line and supplies power to the heat dissipation lamp 100 through an external power supply, and the wire passes through the first insulating member 21 and penetrates out of the wire hole. In a preferred embodiment of the present invention, the first insulating member 21 is provided with a through hole (not numbered) for a wire to pass through, the first insulating member 21 is formed with a column portion 214 along the wire from the through hole, and the column portion 214 is integrally provided with the first insulating member 21, so as to increase a creepage distance at the through hole and prevent creepage along the through hole.

The assembly process of the heat dissipating lamp 100 of the present invention will be described in detail below.

First, a PI film is put into the first insulator 21; then, the light source assembly 30 is put into the first insulator 21 such that the PI film is sandwiched between the first insulator 21 and the light source plate 31; secondly, placing the first insulating piece 21 and the light source assembly 30 into the shell 10 together, wherein the first insulating piece 21 is in clamping fit with the shell 10; and finally, the light reflecting cup of the light source assembly 30 is abutted against the gland 40, and the gland 40 and the shell 10 are clamped and then tightly pressed on the light source assembly 30 and the insulating assembly 20 to complete the assembly.

In summary, in the utility model, the second insulating member 22 with low thermal resistance is disposed at the conducting portion 211 of the first insulating member 21, so that the heat conduction efficiency can be greatly improved under the condition of ensuring the insulation requirement, and meanwhile, the extending portion 12 is disposed at the conducting portion 211 of the housing 10, so that the heat conduction contact area with the second insulating member 22 is increased, and the heat dissipation effect of the heat dissipation lamp 100 can be improved.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A heat dissipating luminaire (100) comprising a light source board (31), a case (10), and a first insulator (21) disposed between the light source board (31) and the case (10), the light source board (31) and the first insulator (21) both being housed in the case (10), characterized in that: be equipped with the intercommunication on first insulating part (21) light source board (31) with conduction portion (211) of casing (10), light source board (31) with still be equipped with between first insulating part (21) thermal resistance and be less than second insulating part (22) of first insulating part (21), light source board (31) by second insulating part (22) with casing (10) heat conduction contact.

2. The heat dissipating luminaire (100) of claim 1, wherein: the shell (10) comprises an extension part (12), and the extension part (12) penetrates through the conduction part (211) and is in direct heat conduction contact with the second insulating part (22).

3. The heat dissipating luminaire (100) of claim 1, wherein: the second insulating member (22) partially penetrates the conduction portion (211) and is in direct heat-conducting contact with the housing (10).

4. The heat dissipating luminaire (100) of claim 1, wherein: the first insulating piece (21) comprises a bottom wall (212) and a side wall (213) surrounding the bottom wall (212), and a cavity for accommodating the light source board (31) is formed by the surrounding of the bottom wall (212) and the side wall (213).

5. The heat dissipating luminaire (100) of claim 4, wherein: lateral wall (213) with be equipped with first joint structure (13) between casing (10), first insulating part (21) by first joint structure (13) joint sets up the inboard of casing (10) and with casing (10) inboard looks butt.

6. The heat dissipating luminaire (100) of claim 1, wherein: the second insulating member (22) is a polyimide film.

7. The heat dissipating luminaire (100) of claim 1, wherein: the light source plate (31) is provided with a light source module (32), and the outer side of the light source module (32) is provided with an optical module (33) which is abutted to the light source plate (31).

8. The heat dissipating luminaire (100) of claim 7, wherein: still include gland (40), optical module (33) part is acceptd in gland (40) and with gland (40) looks butt, gland (40) with be equipped with second joint structure (14) between casing (10), gland (40) pass through second joint structure (14) with casing (10) are fixed mutually, and promote optical module (33) support and press light source board (31), make light source board (31) have the orientation the trend that casing (10) removed.

9. The heat dissipating luminaire (100) of claim 1, wherein: the shell (10) is provided with a wire hole, the light source board (31) is provided with a wire, and the wire penetrates through the first insulating part (21) and penetrates out of the wire hole.

10. The heat dissipating luminaire (100) of claim 1, wherein: the heat dissipation device is characterized in that heat dissipation fins (11) are arranged on the outer side of the shell (10), and a heat dissipation air duct (111) which forms convection with the external environment is arranged between every two adjacent heat dissipation fins (11).