CN200979140Y - light emitting device - Google Patents

Abstract

The utility model is a light emitting device, comprising a cover, a light emitting unit and a heat sink. The cover has a projection end and a heat sink opposite to each other, and a first opening and a second opening are formed at the projection end and the heat sink respectively. The light emitting unit is arranged inside the cover, corresponding to the heat sink, and is used to project light toward the projection end through the first opening. The heat sink is fixed to the heat sink of the cover, and contacts the side of the light emitting unit facing the second opening, so as to dissipate the heat generated by the light emitting unit to the outside of the cover.

Description

light emitting device

technical field

The utility model relates to a light emitting device, in particular to a light emitting device with a radiator.

Background technique

In today's society, all traffic signs, lamps, electronic device displays and other equipment that we see every day have built-in light-emitting components that provide light sources. However, the existing fluorescent tubes or light bulbs for general lighting tend to reduce the luminous efficiency of the light bulbs due to the high heat generated under long-term use, resulting in shortened service life of the light bulbs and must be replaced frequently.

In recent years, photoelectric technology and technology have continued to develop and progress. Light Emitting Diode (LED) has replaced traditional light-emitting components such as light bulbs due to its advantages of light weight, fast response, long service life, and low power consumption. It has become the most important and widely used luminescent material at present.

However, high-power light-emitting diodes relatively means high heat generation, and due to the small size of light-emitting diodes, the heat generated per unit area is also relatively increased. If the heat is not dissipated in time, it may seriously affect the light-emitting diodes. Luminous efficacy, even overheating and cause burnt. In the prior art, the heat dissipation method of light-emitting diodes used in lighting equipment is to use the metal cover covering the outside of the light-emitting diode as a way of heat dissipation, but due to the contact heat conduction between the existing cover and the light-emitting diode Form, due to the small size of light-emitting diodes, the effect of contact heat dissipation is quite limited. Faced with the current increasing power of light-emitting diodes, it is no longer enough for light-emitting diodes with high power requirements.

In order to dissipate the heat generated by the LEDs more effectively, additional cooling devices of different types such as fans, heat sinks, and vapor chambers are added to the lighting device to quickly dissipate the waste heat generated by the LEDs. In the "Heat Dissipation Structure of LED Projector Lamp" disclosed in Taiwan Patent No. M278217, the light-emitting unit is arranged on a heat sink and sandwiched between two heat sinks, and then the two heat sinks are locked together. The radiators are connected with each other so that the light emitting unit is fixed in the two heat sinks, and the heat generated by the operation of the light emitting unit will be directly absorbed by the heat sink, and then conducted to the two heat sinks for heat dissipation.

Although the aforementioned patent No. M278217 can quickly conduct and dissipate the heat energy generated by the light emitting unit, its heat dissipation structure is composed of multiple heat dissipation components, resulting in an overly bulky lighting device and relatively increased manufacturing costs.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a light-emitting device to improve the limited heat dissipation efficiency of the lighting device in the background technology, and the use of multiple heat sinks for heat dissipation, resulting in the volume of the lighting device being too large. Huge, with the problem of increasing manufacturing costs.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A light-emitting device, characterized in that it includes: a cover with a projecting end and a heat dissipation end opposite to each other, and a first opening and a first opening are respectively formed on the heat dissipation end and the projection end. two openings;

A light-emitting unit is arranged inside the cover body, corresponding to the heat dissipation end, and is used to project a light toward the projection end through the first opening; and a heat sink, fixed on the The heat dissipation end is connected to the side of the light-emitting unit facing the second opening, so as to dissipate the heat of the light-emitting unit.

Preferably, the above technical solution can also have the following technical features:

It further includes a lens group, arranged at the projecting end and covering the first opening, for refracting the light of the light-emitting unit.

The cover body has a flange, which protrudes around the inner peripheral surface of the cover body and is close to the heat dissipation end of the cover body, for supporting the light-emitting unit.

The light-emitting unit further includes: a circuit board, arranged inside the cover, corresponding to the heat dissipation end of the cover; and at least one light-emitting component, arranged on the circuit board, the The light-emitting component projects light toward the first opening; wherein the heat sink is in contact with a side of the circuit board facing the second opening.

The heat sink includes a bottom plate and a set of fins, the bottom plate is fixed on the heat dissipation end of the cover and contacts the light-emitting unit, and the set of fins is arranged on the The side of the bottom plate facing the outside of the cover body is located outside the cover body.

It further includes a fastening part, which presses the fin group of the heat sink and fastens it on the cover body, and fixes the heat sink on the heat dissipation end of the cover body.

The fastening piece has at least one button hole, and the cover body has at least one protrusion formed on the outer peripheral edge of the cover body, and the protrusion is inserted into the button hole so that the The fastener fastens the cover body.

It further includes a fastening piece, which presses the bottom plate of the heat sink and fastens it on the cover body, and fixes the heat sink on the heat dissipation end of the cover body.

The fastening piece has at least one button hole, and the cover body has at least one protrusion formed on the outer peripheral edge of the cover body, and the protrusion is inserted into the button hole so that the The fastener is fastened to the cover body.

The cover body further includes at least one fixing hole formed at the heat dissipation end of the cover body, and the fin set has at least one collar extending from the edge of the fin set, a The fixing bolt passes through and is fixed in the fixing hole, and fixes the heat sink on the heat dissipation end of the cover.

The fixing hole is a screw hole, and the fixing bolt is a bolt corresponding to the screw hole.

The fixing bolt is fitted in the fixing hole.

A thread is formed on the inner peripheral surface of the cover, corresponding to the heat dissipation end, and the outer edge of the bottom plate has a screw thread, which is screwed into the thread, and the bottom plate is locked on the cover The heat dissipation end of the body, so as to fix the heat sink on the heat dissipation end of the cover body.

The outer edge of the bottom plate has at least one cam portion, and at least one locking groove is formed on the inner peripheral surface of the cover, and the locking groove locks the cam portion so that the heat sink is fixed on the on the cover.

The diameter of the bottom plate is larger than the diameter of the second opening, and the bottom plate is fixed on the inner side of the cover body in a tight fit, and the heat sink is fixed on the heat dissipation of the cover body. end.

The fin set has at least one collar extending from the edge of the fin set, and the cover has at least one fixing hole connecting the two ends of the cover, and a fixing bolt passes through pass through and be fixed in the collar, and fix the heat sink on the heat dissipation end of the cover.

The inside of the collar has a thread, and the fixing bolt is a bolt corresponding to the screw hole.

The fixing bolt is embedded in the collar.

It further includes at least one heat dissipation medium attached between the heat sink and the light emitting unit.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

The effect of the utility model is that by means of a heat sink fixed on the cover body, the heat sink is in contact with the light-emitting unit inside the cover body through the opening, so that the heat dissipation can be effectively and quickly dissipated without using multiple heat sinks. A large amount of heat energy generated by the light-emitting unit can simultaneously achieve the purpose of reducing the volume of the light-emitting device.

Description of drawings

Fig. 1A is an exploded schematic view of the first embodiment of the present invention;

Fig. 1B is a three-dimensional combined view of the first embodiment of the utility model;

Fig. 1C is a schematic cross-sectional view of the first embodiment of the utility model;

Fig. 2A is an exploded schematic view of the second embodiment of the present invention;

Fig. 2B is a three-dimensional combined view of the second embodiment of the utility model;

Fig. 3A is an exploded schematic view of the third embodiment of the present invention;

Fig. 3B is a three-dimensional combined view of the third embodiment of the present invention;

Fig. 4A is an exploded schematic view of the fourth embodiment of the present utility model;

Fig. 4B is a three-dimensional combined view of the fourth embodiment of the utility model;

Fig. 5A is an exploded schematic view of the fifth embodiment of the present invention;

Fig. 5B is a three-dimensional combined view of the fifth embodiment of the utility model;

Fig. 6A is an exploded schematic view of the sixth embodiment of the present invention;

Fig. 6B is a three-dimensional combined view of the sixth embodiment of the present invention;

Fig. 7A is an exploded schematic view of the seventh embodiment of the present utility model;

Fig. 7B is a three-dimensional combined view of the seventh embodiment of the present utility model;

Fig. 7C is a schematic cross-sectional view of the seventh embodiment of the present utility model;

Fig. 8A is an exploded schematic view of the eighth embodiment of the present invention;

Fig. 8B is a three-dimensional combined view of the eighth embodiment of the utility model;

Fig. 8C is a schematic cross-sectional view of the eighth embodiment of the utility model;

Fig. 9A is an exploded schematic diagram of the ninth embodiment of the present utility model;

Fig. 9B is a three-dimensional combined view of the ninth embodiment of the present utility model;

FIG. 9C is a schematic cross-sectional view of the ninth embodiment of the present invention.

Explanation of reference signs: 100-light-emitting device; 110-lens group; 120-cover body; 121-projection end; 121a-first opening; 122-radiation end; 122a-second opening; 123-flange; block; 130-light-emitting unit; 131-circuit board; 132-light-emitting component; 140-radiator; 141-bottom plate; 142-fin group; 143-radiation medium; Light-emitting device; 120-cover body; 122-radiating end; 123-flange; 122a-second opening; 124-bump; 130-light-emitting unit; 140-radiator; - fastening piece; 151 - button hole; 100 - light emitting device; 120 - cover; 121 - projection end; 122 - heat dissipation end; 122a - second opening; 122b - fixing hole; ; 140-radiator; 141-bottom plate; 142-fin group; 1421-collar; Opening; 122b-fixing hole; 130-luminous unit; 131-circuit board; 141-bottom plate; 142-fin group; 1421-collar; 160-fixing bolt; 122-radiating end; 122a-second opening; 122b-fixing hole; 125-fixing part; 130-light emitting unit; 140-radiator; 141-bottom plate; Fixing bolt; 100-light emitting device; 120-cover body; 121-projection end; 122-radiation end; 122a-second opening; 122b-fixing hole; 125-fixing part; -base plate; 142-fin group; 1421-collar; 160-fixing bolt; 100-luminous device; 120-cover body; 122-radiating end; -radiator; 141-bottom plate; 1411-thread; 142-fin group; 100-light emitting device; 120-cover body; 122-radiating end; 122a-second opening; 140-radiator; 141-bottom plate; 1412-cam; 142-fin group; 100-light emitting device; 120-cover; Device; 141-base plate; 142-fin group.

Detailed ways

1A, 1B, and 1C show a light emitting device 100 disclosed in the first embodiment of the present invention, which includes a lens group 110, a cover 120, a light emitting unit 130, and a heat sink 140 .

Referring again to FIG. 1A to FIG. 1C , the cover body 120 can be a hollow structure of any shape, such as a tapered hollow structure. The cover body 120 has a projecting end 121 and a cooling end 122 opposite to each other. A first opening 121 a is formed at the projecting end 121 , and a second opening 122 a is formed at the cooling end 122 . The lens group 110 is fixed on the projection end 121 and covers the first opening 121 a, so that the cover 120 and the lens group 110 are combined with each other.

Referring again to FIGS. 1A to 1C , the light emitting unit 130 is disposed inside the cover 120 , corresponding to the heat dissipation end 122 . The light emitting unit 130 has a circuit board 131 and one or more light emitting components 132 . The outer diameter of the circuit board 131 is similar to the second opening 122a, and the circuit board 131 is disposed inside the cover 120 and covers the second opening 122a. The light-emitting component 132 is arranged on the circuit board 131, and the side of the circuit board 131 where the light-emitting component 132 is disposed is facing the projection end 121, so that the light-emitting component 132 projects light toward the projection end 121 through the first opening 121a, so that the light is projected to In the lens group 110. The light can be refracted by the lens group 110 to achieve focusing, scattering or diffusion effects. The heat sink 140 is fixed on the heat dissipation end 122 of the cover body 120, and contacts the side of the circuit board 121a of the light emitting unit 130 facing the second opening 122a through the second opening 122a, so as to quickly dissipate the light emitting components 132 of the light emitting unit 130 when they are in operation. A large amount of heat energy is generated.

It is worth noting that the light-emitting components 132 of the light-emitting unit 130 can be individual components, or be arranged in different forms such as an array.

As shown in FIGS. 1A to 1C , the cover body 120 further has a flange 123 , which surrounds and protrudes from the inner peripheral surface of the cover body 120 , close to the heat dissipation end 122 of the cover body 120 . The flange 123 is used to support the circuit board 131 of the light-emitting unit 130, so that the light-emitting unit 130 will not move toward the inside of the cover body 120, and the light-emitting component 132 arranged on the circuit board 131 can stably and accurately emit light to the In the lens group 110.

Referring again to FIG. 1A to FIG. 1C , the heat sink 140 includes a bottom plate 141 and a fin set 142 . The bottom plate 141 is fixed on the heat dissipation end 122 of the cover body 120 for contacting with the circuit board 131 of the light emitting unit 130 through the second opening 122 a. The fin set 142 is disposed on a side of the bottom plate 141 facing the outside of the cover body 120 , and is located outside the cover body 120 . The base plate 141 absorbs the heat of the light-emitting component 132 and transfers it to the fin set 142 , and the fin set 142 then dissipates the heat to quickly dissipate the heat generated by the light-emitting component 132 to cool the light-emitting unit 130 . In addition, at least one heat dissipation medium 143 can be disposed between the circuit board 131 and the base plate 141 , and attached to two opposite surfaces of the circuit board 131 and the base plate 141 , so as to reduce the contact thermal resistance between the circuit board 131 and the base plate 141 .

The material of the fin set 142 and the bottom plate 141 disclosed in the present invention includes but not limited to aluminum or aluminum alloy, copper or copper alloy and other metal materials with high thermal conductivity, so as to quickly conduct and dissipate the heat of the light emitting unit 130 .

Please continue to refer to FIG. 1A to FIG. 1C , the first embodiment of the present invention further includes a fastener 150 for fixing the radiator 140 on one end of the cover 120 . The fastening component 150 is a substantially ㄇ-shaped bracket, and two ends of the fastening component are respectively provided with a buckle hole 151 . The cover body 120 has two protrusions 124 corresponding to the button holes 151 and formed on the outer peripheral surface of the cover body 120 . The fastening piece 150 is pressed on the top of the fin set 142, and the protrusion 124 of the cover body 120 is inserted into the two button holes 151, so as to fasten the fastening piece 150 on the cover body 120, and then press against the heat sink 140 for fixing On the heat dissipation end 122 of the cover 120 , the bottom plate 141 is in close contact with the circuit board 131 of the light emitting unit 130 through the second opening 122 a to effectively dissipate the heat generated by the light emitting unit 130 .

In addition, the above-mentioned light-emitting components 132 include but are not limited to light-emitting diodes (LEDs) or light bulbs and other light-emitting components that can emit light, and the present invention uses light-emitting diodes as drawings for detailed description and is not limited thereto.

Referring again to FIG. 2A and FIG. 2B , it is the light emitting device 100 disclosed in the second embodiment of the present invention. The fastener 150 used to fix the heat sink 140 is a wire buckle with two buttonholes 151, which is pressed on the bottom plate 141, and the projection 124 of the cover 120 is embedded in the buttonhole 151 to fasten the fastener 150. Close to the cover body 120 to press and fix the bottom plate 141 on the heat dissipation end 122 of the cover body 120 , and then press against the heat sink 140 to be fixed on the heat dissipation end 122 of the cover body 120 . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 of the heat sink 140 is in close contact with the light-emitting unit 130 through the second opening 122a, and the fin group 142 arranged on the bottom plate 141 is located in the cover body. 120 to effectively dissipate the heat generated by the light emitting unit 130 .

As shown in FIG. 3A and FIG. 3B , it is a light emitting device 100 disclosed in the third embodiment of the present invention. The cover body 120 has two fixing holes 122b located at the cooling end 122 of the cover body 120 . In order to make the cover body 120 have sufficient thickness to open the fixing hole 122b, the cover body 120 further has two fixing portions 125 protruding from the outer peripheral surface of the cover body 120 . Each fixing portion 125 extends from the cooling end 122 to the projecting end 121 along the axial direction of the cover body 120, and the fixing hole 122b is opened in the part of the fixing portion 125 corresponding to the cooling end 122 along the long axis direction, and the fixing hole 122b The two ends of the fixing portion 125 can be selected to pass through or not pass through. The heat sink 140 has a bottom plate 141 and a fin set 142. The fin set 142 is arranged on the bottom plate 141, and it has two C-shaped collars 1421 extending from the edge of the fin set 142, wherein the collar 1421 are the outer edges of the fins extending from the fin set 142 . The collar 1421 is used for passing the fixing bolt 160 , and the front end of the fixing bolt 160 penetrates through the cooling end 122 and is fixed in the fixing hole 122 b, so that the radiator 140 is fixed on the cover 120 . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 is in close contact with the light-emitting unit 130 through the second opening 122a, and the fin group 142 is located outside the cover body 120, so as to effectively place the light-emitting unit 130 The generated heat is dissipated. In addition, the fixing hole 122b is a screw hole, and the fixing bolt 160 is a bolt corresponding to the screw hole for locking in the fixing hole 122b to fix the front end of the fixing bolt 160 in the fixing hole 122b.

As shown in FIG. 4A and FIG. 4B , it is a light emitting device 100 disclosed in the fourth embodiment of the present invention. In this embodiment, the fixing hole 122 b of the cover body 120 passes through both ends of the fixing portion 125 , so that the fixing hole 122 b connects the projecting end 121 and the cooling end 122 of the cover body 120 . The fixing bolt 160 protrudes from the projecting end 121 of the cover body 120 through the fixing hole 122 b and protrudes from the cooling end 122 . Then, the front end of the fixing bolt 160 penetrates and is fixed on the collar 1421 of the fin set 142 , so that the radiator 140 is fixed on the cover body 120 . The bottom plate 141 is in close contact with the circuit board 131 of the light emitting unit 130 through the second opening 122 a, so as to effectively dissipate the heat conducted by the light emitting unit 130 . In this embodiment, the fixing bolt 160 is a bolt, and the inner peripheral surface of the collar 1421 forms a screw hole corresponding to the bolt, so that the fixing bolt 160 is locked in the collar 1421, and the front end of the fixing bolt 160 is fixed. In the collar 1421 , the heat sink 140 is further fixed on the cover body 120 . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 is in close contact with the light-emitting unit 130 through the second opening 122a, and the fin group 142 is located outside the cover body 120, so as to effectively place the light-emitting unit 130 The generated heat is dissipated.

As shown in FIG. 5A and FIG. 5B , it is a light emitting device 100 disclosed in the fifth embodiment of the present invention. The cover body 120 has two fixing holes 122b located at the cooling end 122 of the cover body 120 . In order to make the cover body 120 have sufficient thickness to open the fixing hole 122b, the cover body 120 further has two fixing portions 125 protruding from the outer peripheral surface of the cover body 120 . Each fixing portion 125 extends from the cooling end 122 to the projecting end 121 along the axial direction of the cover body 120, and the fixing hole 122b is opened in the part of the fixing portion 125 corresponding to the cooling end 122 along the long axis direction, and the fixing hole 122b The two ends of the fixing portion 125 can be selected to pass through or not pass through. The fin set 142 is disposed on the bottom plate 141 , and has two C-shaped collars 1421 located on the edge of the fin set 142 , wherein the collars 1421 are respectively used for a fixing bolt 160 to pass through. The outer diameter of the front end of the fixing bolt 160 is greater than the inner diameter of the fixing hole 122b, so that after the fixing bolt 160 passes through the collar 1421 of the radiator, it is fixed in the fixing hole 122b with its front end in a fitting manner, so that The heat sink 140 is fixed on the heat dissipation end 122 of the cover body 120 so that the bottom plate 141 is in close contact with the circuit board 131 of the light emitting unit 130 through the second opening 122a, and the heat sink 140 is fixed on the cover body 120 . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 is in close contact with the light-emitting unit 130 through the second opening 122a, and the fin group 142 is located outside the cover body 120, so as to effectively place the light-emitting unit 130 The generated heat is dissipated.

As shown in FIG. 6A and FIG. 6B , it is a light emitting device 100 disclosed in the sixth embodiment of the present invention. In this embodiment, the fixing holes 122 b of the cover body 120 pass through both ends of the fixing portion 125 , so that the fixing holes 122 b connect the two ends of the cover body 120 . The outer diameter of the fixing bolt 160 is smaller than the inner diameter of the fixing hole 122b, and the fixing bolt 160 can pass through the fixing hole 122b from the projecting end 121 of the cover 120 to protrude from the heat dissipation end 122 . And the outer diameter of the front end of the fixing bolt 160 is greater than the inner diameter of the collar 1421, so that the front end of the fixing bolt 160 is fixed in the collar 1421 in a fitting manner, and then the radiator 140 is fixed on the heat dissipation end 122 of the cover body 120. . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 is in close contact with the circuit board 131 of the light-emitting unit 130 through the second opening 122a, and the fin group 142 is located outside the cover body 120 to effectively The heat generated by the light emitting unit 130 is dissipated efficiently.

FIG. 7A , FIG. 7B , and FIG. 7C show a light emitting device 100 disclosed in the seventh embodiment of the present invention. In this embodiment, the heat sink 140 has a bottom plate 141 and a fin set 142 , wherein the fin set 142 is disposed on the bottom plate 141 , and the outer edge of the bottom plate 141 has a thread 1411 . A thread 126 corresponding to the thread 1411 is formed on the inner surface of the cover 120 close to the heat dissipation end 122 . The thread 1411 of the bottom plate 141 is used to be screwed to the thread 126 , so that the bottom plate 141 is screwed to the heat dissipation end 122 of the cover 120 . The light-emitting unit 130 is arranged inside the cover body 120, corresponding to the heat dissipation end 122, the bottom plate 141 is in close contact with the light-emitting unit 130 through the second opening 122a, and the fin group 142 is located outside the cover body 120, so as to effectively place the light-emitting unit 130 The generated heat is dissipated.

As shown in FIG. 8A , FIG. 8B , and FIG. 8C , it is a light emitting device 100 disclosed in the eighth embodiment of the present invention. In this embodiment, the heat sink 140 has a bottom plate 141 and a fin set 142 , wherein the fin set 142 is disposed on the bottom plate 141 , and the outer edge of the bottom plate 141 has two protruding cam portions. Two locking grooves 127 corresponding to the cam portion 1412 are formed on the inner surface of the cover body 120 close to the heat dissipation end 122 . The light emitting unit 130 is disposed inside the cover 120 and corresponds to the heat dissipation end 122 . After the bottom plate 141 is placed on the heat sink 122 , the cam portion 1412 of the bottom plate 141 can enter the cover body 120 through the second opening 122 a and slide against the inner surface of the cover body 120 . After the bottom plate 141 is rotated, the cam portion 1412 is moved into the locking groove 127, so that the locking groove 127 locks the cam portion 1412, so that the bottom plate 141 will not be separated from the cooling end 122 in the axial direction, so that the radiator 140 fixed on the cover body 120. The bottom plate 141 is in close contact with the light emitting unit 130 , and the fin set 142 is located outside the cover 120 to effectively dissipate the heat generated by the light emitting unit 130 .

FIG. 9A , FIG. 9B , and FIG. 9C show a light emitting device 100 disclosed in the ninth embodiment of the present invention. In this embodiment, the heat sink 140 has a bottom plate 141 and a fin set 142 , wherein the fin set 142 is disposed on the bottom plate 141 , and the diameter of the bottom plate 141 is slightly larger than that of the second opening 122a. The light emitting unit 130 is disposed inside the cover 120 and corresponds to the heat dissipation end 122 . After the bottom plate 141 is placed on the heat dissipation end 122 , the bottom plate 141 is located at the second opening 122 a and is fixed to the cover body 120 in a tightly fitting manner so as to fix the heat sink 140 on the cover body 120 . The bottom plate 141 is in close contact with the light emitting unit 130 , and the fin set 142 is located outside the cover 120 to effectively dissipate the heat generated by the light emitting unit 130 .

Compared with the prior art, the light-emitting device of the present invention only needs a heat sink, and is firmly installed in the opening of the cover with the light-emitting unit in various fixed combinations, and is in contact with the light-emitting unit, so as to The high heat generated by the light-emitting unit during operation can be quickly dissipated, and the overall volume of the light-emitting device can be greatly reduced to achieve the purpose of miniaturization.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the limitable scope of the claims of the present utility model.

Claims (19)

1. light-emitting device, it is characterized in that: it includes:

One cover body has a relative projection end and a radiating end, and forms one first opening and one second opening respectively at described radiating end and described projection end;

One luminescence unit is arranged on described cover body inboard, corresponding to described radiating end, passes described first opening in order to throw a light towards described projection end; With

One radiator is fixed on described radiating end, and contact removes the heat of described luminescence unit in the side of described luminescence unit towards described second opening to loose.

2. light-emitting device according to claim 1 is characterized in that: more include a set of lenses, be located at described projection end and cover described first opening, in order to reflect the light of described luminescence unit.

3. light-emitting device according to claim 1 is characterized in that: described cover body has a flange, around the inner peripheral surface that is convexly equipped with at described cover body, and the radiating end of approaching described cover body, in order to hold described luminescence unit.

4. light-emitting device according to claim 1 is characterized in that: described luminescence unit more includes:

One circuit board is arranged on described cover body inboard, corresponding to the radiating end of described cover body; With

At least one luminescence component is arranged on the described circuit board, and described luminescence component is towards the described first opening throw light;

Wherein said radiator is that contact is in the side of described circuit board towards described second opening.

5. light-emitting device according to claim 1, it is characterized in that: described radiator includes a base plate and a fins group, described base plate is that the radiating end that is fixed on described cover body also contacts at described luminescence unit, and described fins group is arranged on the side of described base plate towards described cover body outside, and is positioned at the outside of described cover body.

6. light-emitting device according to claim 5 is characterized in that: more include a buckling piece, suppress the fins group of described radiator and be fastened on described cover body, described radiator is fixed on the radiating end of described cover body.

7. light-emitting device according to claim 6, it is characterized in that: described buckling piece has at least one button hole, described cover body has at least one projection, is formed on the outer peripheral edges of described cover body, and described projection embeds described button hole and makes described buckling piece fasten described cover body.

8. light-emitting device according to claim 5 is characterized in that: more include a buckling piece, suppress the base plate of described radiator and be fastened on described cover body, described radiator is fixed on the radiating end of described cover body.

9. light-emitting device according to claim 8, it is characterized in that: described buckling piece has at least one button hole, described cover body has at least one projection, is formed on the outer peripheral edges of described cover body, and described projection embeds described button hole and makes described buckling piece be fastened on described cover body.

10. light-emitting device according to claim 5, it is characterized in that: described cover body more includes at least one fixing hole, be formed on the radiating end of described cover body, and described fins group has at least one collar, extend to form edge in described fins group, one gim peg passes and is fixed in the described fixing hole, described radiator is fixed on the radiating end of described cover body.

11. light-emitting device according to claim 10 is characterized in that: described fixing hole is a screw, and described gim peg is the bolt of a corresponding described screw.

12. light-emitting device according to claim 10 is characterized in that: described gim peg is to be entrenched in the described fixing hole.

13. light-emitting device according to claim 5, it is characterized in that: described cover body inner peripheral surface forms a screw thread, corresponding to described radiating end, and the outer rim of described base plate has a thread, screw togather described screw thread, described base plate is locked together in the radiating end of described cover body, described radiator is fixed on the radiating end of described cover body.

14. light-emitting device according to claim 5, it is characterized in that: the outer rim of described base plate has at least one cam part, and described cover body inner peripheral surface forms at least one fastening groove, and described fastening groove card ends described cam part so that described radiator is fixed on the described cover body.

15. light-emitting device according to claim 5, it is characterized in that: the diameter of described base plate is the diameter greater than described second opening, described base plate is fixed on the inboard of described cover body in the tight fit mode, described radiator is fixed on the radiating end of described cover body.

16. light-emitting device according to claim 5, it is characterized in that: described fins group has at least one collar, extend to form edge in described fins group, and described cover body has at least one fixing hole, the two ends that connect described cover body, one gim peg passes and is fixed in the described collar, described radiator is fixed on the radiating end of described cover body.

17. light-emitting device according to claim 16 is characterized in that: described collar inside has a screw thread, and described gim peg is the bolt of a corresponding described screw.

18. light-emitting device according to claim 16 is characterized in that: described gim peg is to be entrenched in the described collar.

19. light-emitting device according to claim 1 is characterized in that: more include at least one heat eliminating medium, be attached between described radiator and the described luminescence unit.

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