CN220103066U

CN220103066U - Heat dissipation device and lamp

Info

Publication number: CN220103066U
Application number: CN202321119206.7U
Authority: CN
Inventors: 朱胜; 丁艳和
Original assignee: Dongguan Aiduo Illumination Co ltd
Current assignee: Dongguan Aiduo Illumination Co ltd
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-11-28
Anticipated expiration: 2033-05-10

Abstract

The utility model relates to the technical field of lighting lamp devices, in particular to a heat dissipation device and a lamp. The heat dissipating device includes: and a heat sink. The heat dissipation piece comprises a heat collection part and a heat dissipation part. The number of the radiating pieces is two or more, and the radiating pieces are distributed in a circumferential array. The heat collecting part is positioned at one end of the heat radiating piece, which is far away from the central axis of the array of the heat radiating piece. The luminous piece is arranged on the heat collecting part and is attached to the attaching surface, when the luminous piece emits light to generate heat, the heat generated by the luminous piece is transferred to the heat collecting part, and the heat is dissipated outwards through the radiating surface of the radiating part. The heat dissipation parts are arranged in a circumferential array, the light-emitting parts emit light to the outside of the heat dissipation device, and the heat dissipation parts emit heat generated by the light-emitting parts in the heat dissipation device and emit the heat to the outside from the space between the heat dissipation parts. Therefore, the heat of the luminous piece is conducted to the heat radiating part through the heat collecting part and is radiated outwards through the heat radiating part, so that the heat radiating effect of the lamp is improved, the adverse effect of the heat on the lamp is reduced, and the service life of the lamp is prolonged.

Description

Heat dissipation device and lamp

Technical Field

The utility model relates to the technical field of lighting lamp devices, in particular to a heat dissipation device and a lamp.

Background

The lighting lamp is widely applied to various fields of daily life and industrial production, and provides great convenience for daily life and production activities of people. The lamps used in the current industrial production or road illumination are usually incandescent lamps, sodium lamps or tungsten lamps, etc., and these light sources have low luminous efficiency, large electric energy loss, low reliability and high maintenance cost.

Compared with a common lighting lamp, the LED lamp is more energy-saving, longer in service life and smaller in size, so that the LED lamp is more and more widely applied to various fields of daily life and industrial production.

The LED lamp can generate heat in the working process, so that relevant elements of the lamp work in a high-temperature environment, and the working reliability of the LED lamp is affected.

Therefore, how to improve the heat dissipation effect of the lamp, reduce the adverse effect of heat on the lamp, and prolong the service life of the lamp is a technical problem to be solved.

Disclosure of Invention

The utility model provides a heat dissipation device and a lamp, and aims to solve the technical problems of how to improve the heat dissipation effect of the lamp, reduce the adverse effect of heat on the lamp and prolong the service life of the lamp in the prior art.

The utility model provides a heat dissipation device, comprising:

the heat dissipation part comprises a heat collection part and a heat dissipation part, wherein the heat collection part is provided with a joint surface, the heat dissipation part is provided with a heat dissipation surface, the heat dissipation part is connected with one surface of the heat collection part, which is away from the joint surface, and the heat dissipation surface extends in a direction away from the joint surface;

the number of the radiating pieces is two or more, the radiating pieces are arranged in a circumferential array, and the middle vertical surface of the joint surface and the radiating surface both point to the central axis of the array of the radiating pieces;

the heat collecting part is positioned at one end of the heat radiating piece, which is away from the central axis of the array of the heat radiating piece;

when the luminous piece is installed in the radiating piece, the luminous piece is attached to the attaching surface, so that heat of the luminous piece is transferred to the heat collecting part.

Still further, a heat dissipation channel is further provided, and a central axis of the heat dissipation channel coincides with an array central axis of the heat dissipation element.

Furthermore, a gap is reserved between the adjacent heat dissipation parts, the positions of the heat dissipation holes correspond to the gap, and the gap is communicated with the heat dissipation channel.

Further, the heat dissipation part is provided with fins, and the fins and the heat dissipation part are integrally extruded.

Further, the number of the fins is two or more, and the heat dissipation area of the fin closest to the heat collecting part is the largest.

Furthermore, the heat dissipation piece is made of aluminum, and the heat dissipation piece is integrally extruded.

On the other hand, the utility model also provides a lamp, which comprises the heat dissipation device;

the top cover assembly is arranged at the top of the heat dissipation device, a top light emitting part is arranged in the top cover assembly, the top cover assembly is provided with heat dissipation holes, and the top light emitting part avoids the heat dissipation holes;

the side luminous piece is arranged on the heat collecting part in a clamping manner;

the heat dissipation holes are used for discharging heat emitted by the heat dissipation piece.

Still further, still include the lamp holder subassembly that is used for holding the power, the lamp holder subassembly passes through coupling assembling with heat abstractor deviates from the one end of top cap subassembly links to each other.

Further, the lamp cap assembly comprises a lamp cap piece and a lamp cap cover, and the lamp cap cover covers the power supply of the lamp in the inner cavity of the lamp cap piece;

the connecting assembly comprises a connecting plate and a connecting cover, and the connecting cover seals the circuit board of the lamp on the connecting plate;

the connecting plate is connected with one end of the heat dissipation device, which is away from the top cover assembly;

the lamp cap cover is connected with the connecting cover, at least one of the lamp cap cover and the connecting cover is provided with a protrusion, and the protrusion is positioned between the lamp cap cover and the connecting cover, so that a gap is formed between the lamp cap cover and the connecting cover.

Still further, the top cap subassembly includes lamina tecti and top printing opacity cover, lamina tecti install in heat abstractor's tip, top luminous member install in lamina tecti deviates from heat abstractor's one side, top printing opacity cover will top luminous member closing cap in lamina tecti, the louvre set up in lamina tecti, top printing opacity cover is provided with dodges the groove, dodge the groove with the louvre dodges.

The beneficial effects achieved by the utility model are as follows:

the utility model provides a heat dissipation device and a lamp. The heat dissipating device includes: and a heat sink. The radiating piece includes heat collecting part and radiating part, and heat collecting part is provided with the faying surface, and radiating part is provided with the radiating surface, and radiating part links to each other with the one side that heat collecting part deviates from the faying surface, and the radiating surface extends towards the direction that deviates from the faying surface. The number of the radiating pieces is two or more, the radiating pieces are distributed in a circumferential array, and the middle vertical surface and the radiating surface of the joint surface point to the central axis of the array of the radiating pieces. The heat collecting part is positioned at one end of the heat radiating piece, which is far away from the central axis of the array of the heat radiating piece. When the luminous piece is installed on the heat dissipation piece, the luminous piece is attached to the attaching surface, so that heat of the luminous piece is transferred to the heat collecting part.

When the luminous piece emits light to generate heat, the heat generated by the luminous piece is partially transferred to the heat collecting part and then is dissipated outwards through the radiating surface of the radiating part. The heat dissipation parts are arranged in a circumferential array, the light-emitting parts emit light to the outside of the heat dissipation device, and the heat dissipation parts emit heat generated by the light-emitting parts in the heat dissipation device and emit the heat to the outside from the space between the heat dissipation parts.

Therefore, the heat of the luminous piece is conducted to the heat radiating part through the heat collecting part and is radiated outwards through the heat radiating part, so that the heat radiating effect of the lamp is improved, the adverse effect of the heat on the lamp is reduced, and the service life of the lamp is prolonged.

Drawings

FIG. 1 is an exploded view of a light fixture in one embodiment of the utility model;

FIG. 2 is a schematic perspective view of a lamp according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 in accordance with the present utility model;

fig. 4 is a schematic perspective view of a heat dissipating device according to an embodiment of the present utility model.

Description of main reference numerals:

10. a lamp;

20. a heat sink; 21. a heat sink; 22. a heat collecting section; 23. a bonding surface; 24. a heat dissipation part; 25. a heat radiating surface; 26. fins; 27. a heat dissipation channel; 28. a void; 29. a side light emitting member;

30. a top cover assembly; 31. a top cover plate; 32. a top light-transmitting cover; 33. a top light emitting member; 34. a heat radiation hole; 35. an avoidance groove;

40. a lamp head assembly; 41. a base member; 42. a lamp cap; 43. a power supply;

50. a connection assembly; 51. a connecting plate; 52. a connection cover; 53. a circuit board; 54. a protrusion.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. Furthermore, it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "left," "right," "horizontal," "top," "bottom," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Example 1

Referring to fig. 3 to 4, in some embodiments of the present utility model, a heat dissipating device 20 according to the present utility model includes: a heat sink 21. The heat dissipation element 21 comprises a heat collection portion 22 and a heat dissipation portion 24, the heat collection portion 22 is provided with a bonding surface 23, the heat dissipation portion 24 is provided with a heat dissipation surface 25, the heat dissipation portion 24 is connected with one surface of the heat collection portion 22, which is away from the bonding surface 23, and the heat dissipation surface 25 extends in a direction away from the bonding surface 23. The number of the heat dissipation elements 21 is two or more, the heat dissipation elements 21 are arranged in a circumferential array, and the middle vertical surface of the bonding surface 23 and the heat dissipation surface 25 are both directed to the central axis of the array of the heat dissipation elements 21. The heat accumulating portion 22 is located at an end of the heat dissipating member 21 facing away from the central axis of the array of heat dissipating members 21. When the light emitting member is mounted on the heat dissipating member 21, the light emitting member is attached to the attaching surface 23, so that heat of the light emitting member is transferred to the heat collecting portion 22.

The light emitting member is attached to the heat collecting portion 22 and bonded to the bonding surface 23, and when the light emitting member emits light to generate heat, a part of the heat generated by the light emitting member is transferred to the heat collecting portion 22. The heat dissipation portion 24 is connected to the heat collecting portion 22, so that the heat transferred from the light emitting element like the heat collecting portion 22 is transferred to the heat dissipation portion 24 and then dissipated outwards through the heat dissipation surface 25 of the heat dissipation portion 24.

The plurality of radiating pieces 21 are arranged in a circumferential array, and the luminous pieces are also arranged in a circumferential array along with the radiating pieces 21, so that the luminous pieces emit light to the circumference of the outside of the radiating device 20, and the irradiation range of the luminous pieces is enlarged. The heat radiating portion 24 radiates heat generated from the light emitting members inside the heat radiating device 20, and radiates the heat to the outside from the space between the heat radiating members 21.

In this way, the heat of the light emitting element is conducted to the heat dissipating part 24 through the heat collecting part 22 and is dissipated outwards through the heat dissipating part 24, so as to improve the heat dissipating effect of the heat dissipating device 20.

Referring to fig. 4, in some embodiments of the present utility model, the heat dissipating device 20 is further provided with a heat dissipating channel 27, and a central axis of the heat dissipating channel 27 coincides with an array central axis of the heat dissipating member 21.

The heat dissipation elements 21 are circumferentially arranged on the circumference of the heat dissipation channel 27, and the heat dissipated from the heat dissipation elements 21 is collected to the heat dissipation channel 27 and dissipated to the outside of the heat dissipation device 20 along the heat dissipation channel 27.

It will be appreciated that the heat emitted by the heat dissipation element 21 heats the air in the heat dissipation channel 27, and according to the principle of thermal expansion and contraction, the air in the heat dissipation channel 27 is heated to expand and reduce the density, and the heated air flows upwards, so that an upward airflow is formed in the heat dissipation channel 27. Since the air in the heat dissipation path 27 rises, the air pressure in the lower portion of the heat dissipation path 27 is reduced, that is, the air pressure lower than the outside is formed in the lower portion of the heat dissipation path 27, and the air having the lower temperature outside the heat dissipation device 20 flows into the space having the lower air pressure, that is, the air having the lower temperature outside the heat dissipation device 20 enters the heat dissipation path 27 from the lower portion of the heat dissipation path 27. The air in the heat dissipation channel 27 carries the heat emitted by the heat dissipation element 21 to flow out from the upper part of the heat dissipation channel 27, and the air with lower external temperature of the heat dissipation device 20 flows in from the lower part of the heat dissipation channel 27, so that the heat dissipation air flow is formed, and the heat dissipation effect of the heat dissipation device 20 is further improved.

In some embodiments of the present utility model, a gap 28 is left between adjacent heat dissipation elements 21, the position of the heat dissipation hole 34 corresponds to the gap 28, and the gap 28 communicates with the heat dissipation channel 27.

When the heat dissipating device 20 dissipates heat outwards, air with lower external temperature enters the heat dissipating channel 27 from the air gap 28 at the lower part of the heat dissipating device 20, and air with higher temperature in the heat dissipating device 20 is discharged out of the heat dissipating device 20 from the air gap 28 at the upper part of the heat dissipating device 20 and the top of the heat dissipating device 20. In this way, the air inlet and outlet amount of the air at the heat dissipating device 20 is increased by the arrangement of the air gap 28, the fluidity of the air in the heat dissipating device 20 is improved, and the heat dissipating effect of the heat dissipating device 20 is further improved.

In some embodiments of the present utility model, the heat sink 24 is provided with fins 26, and the fins 26 are integrally extruded with the heat sink 24.

The heat dissipation area of the heat dissipation part 24 is increased through the fins 26, the heat dissipation capacity of the heat dissipation piece 21 is improved, the fins 26 and the heat dissipation part 24 are integrally extruded and formed, and the effect of heat transfer from the heat dissipation part 24 to the fins 26 is improved. In this way, the heat dissipation effect of the heat dissipation device 20 is further improved.

In some embodiments of the present utility model, the number of fins 26 is two or more, and the heat dissipation area of the fins 26 closest to the heat accumulating portion 22 is the largest.

By arranging the plurality of fins 26, the heat dissipating capability of the heat dissipating member 21 is further improved, and since the fins 26 closest to the heat collecting portion 22 receive heat first and are located at the outermost side of the heat dissipating device 20, if the fins 26 closest to the heat collecting portion 22 dissipate the largest amount of heat outwards under the same heat dissipating area, and the fins 26 closest to the heat collecting portion 22 dissipate the largest amount of heat to the outside of the heat dissipating device 20 first, the fins 26 furthest inwards dissipate most of heat to the inside of the heat dissipating device 20. Therefore, the heat dissipation area of the fins 26 closest to the heat collecting portion 22 is designed to be the largest in each fin 26, so as to improve the heat dissipation capacity of the fins 26, increase the heat dissipation rate of the heat dissipation member 21 to the outside of the heat dissipation device 20, and further improve the heat dissipation effect of the heat dissipation device 20.

In some embodiments of the present utility model, the heat dissipation element 21 is made of aluminum, and the heat dissipation element 21 is integrally extruded.

Aluminum has good heat conduction performance and is easy to process. By integrally extrusion-molding the aluminum heat sink 21, the heat conduction effect of the heat sink 21 can be improved, the heat dissipation capability of the heat sink 21 can be improved, and the heat dissipation effect of the heat dissipation device 20 can be further improved.

Example two

Referring to fig. 1 to 3, in some embodiments of the present utility model, a lamp 10, a heat dissipating device 20, a top cover assembly 30, and a side light 29 are provided. The top cover assembly 30 is mounted on the top of the heat dissipating device 20, a top light emitting member 33 is mounted in the top cover assembly 30, the top cover assembly 30 is provided with heat dissipating holes 34, and the top light emitting member 33 avoids the heat dissipating holes 34. The side light 29 is attached to the heat collecting portion 22 by being engaged with each other. Wherein the heat dissipation holes 34 are used for discharging heat dissipated by the heat dissipation element 21.

The luminaire 10 is made illuminable through the top of the luminaire 10 by the top lighting element 33 and the luminaire 10 is made illuminable through the sides of the luminaire 10 by the side lighting elements 29. The side light emitting member 29 is clamped to the heat collecting portion 22, specifically, the heat collecting portion 22 may be provided with a clamping groove, the side light emitting member 29 may be clamped into the clamping groove of the heat collecting portion 22, two sides of the side light emitting member 29 are fixed through the clamping groove, and one surface of the side light emitting member 29 facing away from the surface is bonded to the bonding surface 23. When the side light-emitting element 29 emits light to generate heat, the heat is transferred to the heat collecting portion 22, and the heat from the heat collecting portion 22 is emitted through the heat radiation surface 25 of the heat radiation portion 24. The heat emitted from the heat sink 21 is carried by the air again, and is emitted to the outside of the heat sink 20 through the heat dissipation holes 34 or the slits of the heat sink 20. In this way, the heat dissipation effect of the lamp 10 is improved by the heat dissipation device 20.

When the top light emitting member 33 emits light, the heat emitted by the top light emitting member 33 is transferred to the top portion of the heat dissipating device 20 and the top space of the lamp 10, so that the top light emitting member 33 is dissipated by the top structure of the heat dissipating device 20, and the heat emitted by the top light emitting member 33 is accelerated by the top airflow of the heat dissipating device 20. When the top light emitting member 33 emits light, the temperature of the air in the top space of the lamp 10 is increased, so as to further reduce the density of the air at the top of the lamp 10, increase the pressure difference between the air at the top and the air at the bottom of the lamp 10, thereby accelerating the air flow in the lamp 10, increasing the outward discharge rate of the heat in the lamp 10, and increasing the entering rate of the air with lower temperature from the outside into the lamp 10, thus further improving the heat dissipation effect of the lamp 10, reducing the adverse effect of the heat on the lamp 10, and prolonging the service life of the lamp 10.

Referring to fig. 1, in some embodiments of the present utility model, the lamp 10 further includes a lamp cap assembly 40 for accommodating a power source 43, and the lamp cap assembly 40 is connected to an end of the heat sink 20 facing away from the cap assembly 30 through a connection assembly 50.

The lamp cap assembly 40 is separated from the heat sink 20 by the connection assembly 50, so that the transfer amount of heat from the heat sink 20 to the lamp cap assembly 40 is reduced, the influence of heat dissipation from the power supply 43 to the heat sink 20 is prevented, and the reliability of the power supply 43 is improved.

Referring to fig. 1, in some embodiments of the present utility model, a lamp cap assembly 40 includes a lamp cap 41 and a lamp cap 42, and the lamp cap 42 covers a power supply 43 of a lamp 10 in an inner cavity of the lamp cap 41. The connection assembly 50 includes a connection plate 51 and a connection cover 52, and the connection cover 52 covers a circuit board 53 of the lamp 10 on the connection plate 51. The connection plate 51 is connected to an end of the heat sink 20 facing away from the header assembly 30. The lamp cap 42 is connected to the connection cap 52, and at least one of the lamp cap 42 and the connection cap 52 is provided with a protrusion 54, and the protrusion 54 is located between the lamp cap 42 and the connection cap 52 so that the lamp cap 42 and the connection cap 52 form a gap.

The heat dissipation device 20 is separated from the circuit board 53 by the connecting plate 51, so that components in the circuit board 53 are prevented from being in a high-temperature working environment by heat emitted by the heat dissipation device 20, the service life of the components in the circuit board 53 is prolonged, and the reliability of the circuit board 53 is improved. The lamp cap assembly 40 is separated from the connection assembly 50 by the protrusions 54, and a gap is formed between the lamp cap assembly 40 and the connection assembly 50, so that the transmission amount of heat emitted by the power supply 43 to the circuit board 53 is reduced, adverse effects of components in the circuit board 53 due to heat emitted by the power supply 43 are avoided, the service life of the components in the circuit board 53 is prolonged, and the reliability of the circuit board 53 is improved.

In some embodiments of the present utility model, the top cover assembly 30 includes a top cover plate 31 and a top transparent cover 32, the top cover plate 31 is mounted on an end portion of the heat dissipating device 20, the top light emitting member 33 is mounted on a surface of the top cover plate 31 facing away from the heat dissipating member 21, the top transparent cover 32 covers the top light emitting member 33 on the top cover plate 31, the heat dissipating hole 34 is disposed on the top cover plate 31, the top transparent cover 32 is provided with a avoiding groove 35, and the avoiding groove 35 is configured to avoid the heat dissipating hole 34.

The top light emitting member 33 enables the lamp 10 to emit light from the top, and the illumination range of the lamp 10 is widened. The top light emitting element 33 is covered on the top cover plate 31 by the top light transmitting cover 32 to protect the top light emitting element 33, so that the risk of damaging the top light emitting element 33 is reduced. The heat that heat abstractor 20 given off outwards gives off from louvre 34, through dodging the setting of groove 35, prevents that top printing opacity cover 32 from forming the shutoff to louvre 34 to guarantee the good gas permeability of louvre 34. The top cover plate 31 may be made of aluminum to dissipate heat of the top light emitting member 33, and to increase the speed of transferring the heat emitted by the top light emitting member 33 to the heat dissipating device 20, so as to improve the heat dissipating effect of the top light emitting member 33.

In the description of the present specification, reference to the terms "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the foregoing description of the preferred embodiment of the utility model is provided for the purpose of illustration only, and is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. A heat sink, comprising:

2. The heat dissipating device of claim 1, further comprising a heat dissipating channel having a central axis coincident with the central axis of the array of heat dissipating elements.

3. The heat dissipating device of claim 2, wherein a space is left between adjacent heat dissipating members, the position of the heat dissipating hole corresponds to the space, and the space communicates with the heat dissipating channel.

4. The heat dissipating device of claim 1, wherein the heat dissipating portion is provided with fins integrally extruded with the heat dissipating portion.

5. The heat dissipating device of claim 4, wherein the number of fins is two or more, and the fin heat dissipating area closest to the heat collecting portion is the largest.

6. The heat dissipating device of claim 1, wherein the heat dissipating member is aluminum, and the heat dissipating member is integrally extruded.

7. A lamp comprising a heat sink according to any one of claims 1-6;

8. A light fixture as recited in claim 7, further comprising a light head assembly for receiving a power source, said light head assembly being connected to an end of said heat sink facing away from said top cap assembly by a connection assembly.

9. A lamp as recited in claim 8, wherein the lamp head assembly includes a lamp head piece and a lamp head cover, the lamp head cover capping a power source of the lamp to an interior cavity of the lamp head piece;

10. The lamp of claim 7, wherein the top cover assembly comprises a top cover plate and a top light-transmitting cover, the top cover plate is mounted at the end of the heat dissipating device, the top light-emitting element is mounted on the surface of the top cover plate, which faces away from the heat dissipating device, the top light-transmitting cover covers the top light-emitting element on the top cover plate, the heat dissipating holes are formed in the top cover plate, and the top light-transmitting cover is provided with avoiding grooves which avoid the heat dissipating holes.