CN201081212Y - light emitting device - Google Patents

Abstract

A light-emitting device comprises a heat-radiating seat and a light-emitting diode, wherein the heat-radiating seat is provided with a containing groove and heat-radiating fins arranged around the containing groove so that the light-emitting diode is arranged in the containing groove, and a lampshade with a cambered surface light-transmitting body is used for covering the containing groove, so that heat generated by the light-emitting diode is conducted out of the heat-radiating seat through the heat-radiating fins, and light of the light-emitting diode can be emitted out of the lampshade to generate a refraction effect, and a uniform and shadowless projection light source is obtained.

Description

light emitting device

technical field

The utility model relates to a light emitting device, in more detail, relates to a light emitting device with heat dissipation performance.

Background technique

With the continuous evolution of light-emitting diode (Light Emitting Diode, hereinafter referred to as LED) materials and packaging technology, the brightness of LED has been continuously improved. Advantages of high-brightness LED lighting products, such as advertising billboards, flashlights, general lighting and automotive instrument panel backlight.

Basically, the luminous brightness of the LED is proportional to the current flowing through it, that is, the higher the input current, the higher the luminous brightness. However, judging from the current luminous efficiency of LEDs, only 15-20% of the input power is converted into light, but nearly 80-85% is converted into heat. When increasing the luminous brightness, the input current must be increased, but the input power must also be increased. converted into heat. If the heat cannot be discharged to the outside of the LED in a timely manner, the chip temperature of the LED will be too high, which will affect its luminous efficiency and service life.

The current LED module, as shown in FIG. 1 , includes a carrier with an anode pin 11 and a cathode pin 13, an LED chip 10 disposed on the carrier, and a wire for electrically connecting the anode pin 11 and the cathode pin 13. 12 , and a transparent encapsulation body 14 , the encapsulation body 14 covers the periphery of the LED chip 10 to protect the LED chip 10 .

For the above-mentioned LED module, because the periphery of the LED chip 10 covers the package body 14, when the input current is increased to increase the luminous brightness, a large amount of heat will be generated and cannot be discharged to the outside of the package body 14, so that the LED chip 10 and the overall structure As the temperature rises, the wire 12 is likely to be fused, and the LED module will fail.

Therefore, due to the disadvantages of the above-mentioned prior art, such as poor heat dissipation performance and short service life, it is an urgent problem to be solved in the art to provide a light emitting device that effectively solves these disadvantages.

Contents of the invention

In view of the shortcomings of the prior art described above, an object of the present invention is to provide a light emitting device with good heat dissipation effect.

Another object of the present invention is to provide a light emitting device with a long service life.

In order to achieve the above object, the utility model provides a light emitting device, comprising: a heat sink and a light emitting diode, the heat sink has a housing groove and heat dissipation fins arranged around the housing groove, the light emitting diode is arranged in the housing in the slot.

The bottom of the heat sink is connected with a carrier plate to cover one side of the accommodating groove. The carrier plate is formed with two through holes corresponding to the accommodating groove of the heat sink. Two pins for power supply connection to external devices.

The light-emitting device above also includes a lampshade, which is a light-transmitting body with an arc surface, and covers the accommodating groove. The accommodating groove is a circular opening, and the accommodating groove has a concave portion surrounding its wall surface, and the lampshade has a convex portion corresponding to the concave portion, so that the convex portion fits the concave portion, for this reason, the lampshade is disassembled Installing on the accommodating groove and covering the accommodating groove not only protects the LED, but also causes the light of the LED to emit through the lampshade to produce a refraction effect.

In the above-mentioned light-emitting device, the heat generated by the light-emitting diode can be conducted out of the heat-dissipating seat through the heat dissipation fins, so that the heat will not accumulate in the storage tank, thereby reducing the temperature in the storage tank and avoiding the heat dissipation. LED is damaged.

Since the light-emitting device provided by the utility model is designed to place the light-emitting diode in the accommodating groove of the heat sink, the heat generated by the light-emitting diode can be conducted out of the heat sink by the heat dissipation fins on the periphery of the heat sink, which greatly reduces the capacity of the heat sink. The temperature in the tank can achieve the purpose of good heat dissipation effect, and because of the good heat dissipation effect, the light emitting diode is not easy to be damaged, and the purpose of long service life is achieved. At the same time, a lampshade with a cover is arranged outside the accommodating groove, which not only protects the light-emitting diodes, but also makes the light of the light-emitting diodes pass through the lampshade to produce a refraction effect, and the lampshade can be replaced with lampshades of different focal lengths according to the degree of refraction. The visible distance of the light emitted by the light emitting diode through the lampshade is lengthened, and a uniform and shadow-free projection light source is obtained, and the problem of focal length adjustment between the light emitting diode and the light-transmitting body can be eliminated.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a schematic diagram showing a conventional light-emitting device;

Fig. 2 is a three-dimensional exploded view showing the light emitting device of the present invention;

Figure 3 is a perspective view showing the light emitting device of the present invention; and

FIG. 4 is a side sectional view showing the light emitting device of the present invention.

Among them, reference signs

10 LED chips

11 anode pin

12 wires

13 cathode pin

14 packages

2 LEDs

21 pins

3 heat sink

31 cooling fins

32 storage slots

321 concave

33 carrier plates

331 through hole

34 screws

4 shades

41 Convex

Detailed ways

The specific embodiments of the present invention will be described below with reference to the accompanying drawings, so that those skilled in the art can easily understand the technical features and achieved effects of the present invention.

Please refer to FIG. 2 to FIG. 4 , which are three-dimensional exploded views, three-dimensional views and side sectional views of the light emitting device of the present invention.

The light-emitting device provided by the utility model includes: a light-emitting diode 2 and a heat dissipation seat 3. The heat dissipation seat 3 presents a square structure in which a circular opening is formed. Locked on a carrier plate 33 with two through holes 331 to close one side of the through accommodating groove 32, the surrounding of the accommodating groove 32 is provided with cooling fins 31, and the LED 2 is arranged in the accommodating groove 32, and the light-emitting diode 2 has two pins 21 exposed to the heat sink 3 through the two through holes 331 of the carrier board 33, so as to connect to external devices with power supply.

The above-mentioned lighting device also includes a lampshade 4 , which is a light-transmitting body with an arc surface, and covers the accommodating groove 32 .

The accommodating groove 32 has a concave portion 321 surrounding its wall surface, and the outer ring of the lampshade 4 has a convex portion 41 corresponding to the concave portion 321, so that the convex portion 41 fits into the concave portion 321, so that the lampshade 4 is assembled. Cover the accommodating groove 32 in the accommodating groove 32, so that the light emitting diode 2 is located in a closed space, so that not only the light emitting diode 2 can be protected, but also the light of the light emitting diode 2 will be refracted when it is emitted through the lampshade 4 Effect.

The convex part 41 fits the recessed part 321 so that the lampshade 4 can be replaced with lampshades 4 with different focal lengths according to the degree of refraction. This method increases the visible distance of the light emitted by the light emitting diode 2 through the lampshade 4 and obtains a uniform There is no shadow projecting light source, and the problem of focal length adjustment between the light-emitting diode 2 and the light-transmitting body can be eliminated.

In the above-mentioned light-emitting device, the heat generated by the light-emitting diode 2 can be conducted out of the heat-dissipating base 3 by the heat-dissipating fins 31 of the heat-dissipating base 3, so that the heat will not accumulate in the accommodating groove 32, so that the heat can be reduced. The temperature in the accommodating tank 32 can avoid damage to the light-emitting diode 2 and achieve the effect of heat dissipation.

It can be seen from the above that the light emitting device of the present invention is designed to place the light emitting diode 2 in the accommodating groove 32 of the heat sink 3, and the heat generated by the light emitting diode 2 can be conducted out by the heat dissipation fins 31 on the periphery of the heat sink 3 to dissipate heat. The seat 3 greatly reduces the temperature in the accommodating tank 32. Compared with the prior art, it really improves the heat dissipation effect, and because of the good heat dissipation effect, the light emitting diode 2 is not easy to be damaged, and the service life of the light emitting device is indeed improved. At the same time, a lampshade 4 with a cover is arranged outside the accommodating groove 32, which not only protects the light emitting diode 2, but also causes the light of the light emitting diode 2 to have a refraction effect when it is emitted through the lampshade 4, and the lampshade 4 can be used as desired. The degree of refraction is replaced by a lampshade 4 with a different focal length. In this way, the visible distance of the light emitted by the light emitting diode 2 through the lampshade 4 is lengthened, and a uniform and shadowless projected light source is obtained, and the adjustment of the focal length between the light emitting diode 2 and the light-transmitting body can be eliminated. question.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (7)

1. A lighting device, characterized in that, comprising: The heat sink has an accommodating groove and heat dissipation fins arranged around the accommodating groove; and The light emitting diode is arranged in the accommodating groove. 2. The light emitting device according to claim 1, wherein the accommodating groove is a circular opening. 3 . The lighting device according to claim 1 , further comprising a lampshade having an arc surface and covering the accommodating slot. 4 . 4 . The lighting device according to claim 3 , wherein the accommodating groove has a concave portion surrounding its wall surface, and the lampshade has a convex portion corresponding to the concave portion, so that the convex portion fits into the concave portion. 5. The lighting device according to claim 3, wherein the lampshade is a light-transmitting body. 6 . The light emitting device according to claim 1 , wherein a carrier plate is connected to the bottom of the heat sink to cover one side of the accommodating groove. 7 . 7. The light emitting device according to claim 6, wherein the carrier board is formed with two through holes corresponding to the accommodating groove of the heat sink, and the light emitting diode has two pins passing through the two through holes, Connect to external devices with power supply.

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