KR101608972B1 - head for LED streetlight - Google Patents

Abstract

The present invention relates to a head for an LED lamp, and more particularly, to a head for an LED lamp in which a heat generated from an LED module is transferred to a housing and discharged to the outside, so the housing is used as a heat sink, so that a heat sink effect that an internal heat is released to the outside is improved even if the number of a heat sink formed on the LED module is reduced, thereby securing a high reliability and realizing a light weight and a cost saving. The head for an LED lamp of the present invention includes: a housing which has an inner space and of which a lower part is opened; a base part which is coupled to the opened lower part of the housing and has an inserting hole; unit LED modules which are inserted into the inside of the housing to couple with the base part and a first coupling member, and have a plurality of radiation pins mounted above the unit LED modules at intervals each other; and a second coupling member coupled to the unit LED modules in the housing.

Description

Head for LED streetlight}

More particularly, the present invention relates to a head for an LED headlamp, and more particularly, it relates to a head for an LED headlamp which is capable of transferring heat generated from the LED module to a housing and discharging the heat to the outside, thereby reducing the amount of a heat radiator formed in the LED module, The present invention relates to an LED light head which can improve the effect and diffuse internal heat to the outside, which can ensure high reliability, contribute to weight reduction and cost reduction.

Generally, a streetlight is a lighting facility installed along the edge of a road for safety and security of street traffic. Such a streetlight is installed on a highway, a main road of a city area, a commercial district road, It is provided in a form suitable for it.

Therefore, the conventional street light is composed of a strut which is erected at a predetermined height on the ground surface of the roadside, an arm which is laterally connected to the strut, and a head which is connected to the arm and includes a light source.

When a light source such as a mercury lamp, an incandescent lamp, or a halogen lamp is installed, power consumption is relatively large. In view of this, recently, light emitting diodes (LEDs) having high brightness, reduced power consumption and long lifetime have been used as light sources for street lamps.

On the other hand, since the outdoor lighting device is exposed to the outside, requirements for airtightness, water resistance, dust resistance and heat dissipating are more strict than those of the indoor lighting device. Since LEDs have low heat resistance, generally, a heat dissipating module (heat dissipating member) is used to dissipate heat generated by each LED.

On the other hand, power LEDs with higher luminance than high-brightness LEDs have recently been developed at the same power consumption, and the possibility of replacing high-brightness LEDs is increasing. Power LEDs with power consumption of 2W have a problem in that when the temperature exceeds about 47 ° C, the light output is lowered, the wavelength is changed, and the color is changed. When the heat radiation treatment is insufficient, the LED is damaged within 1 hour .

That is, when the temperature of the power LED is insufficient, the power resistance of the power LED is decreased. As a result, the electric resistance value is decreased. As a result, the amount of current flowing through the power LED is increased and the power consumption is increased.

Korean Patent Registration No. 0808266 discloses a light source including a plurality of power LEDs; A current limiter for limiting the amount of current flowing in the light source portion within a predetermined range; A heat dissipation unit for dissipating heat generated in the light source unit; And a body portion formed integrally with the heat dissipation portion and having the current limiter attached thereto, wherein a ratio of a surface area of the body portion to a power consumption of the light portion is 69 to 125.

Patent No. 0754973 discloses a streetlight in which a light source mounting board on which a light source mounting board on which LEDs are mounted is integrally formed with a four-sided convex body, the remaining four surfaces except the center plane of the convex body are inclined, and the like.

Patent No. 0880200 discloses an LED module having a plurality of light emitting diode (LED) modules mounted on a fixed portion of a heat sink connected to a case of a streetlight in order to extend the irradiation range by varying the irradiation angle of each LED module And a street lamp having a partition for forming a block is posted.

On the other hand, the streetlight can be designed to have various illuminance depending on the place of installation or the height of the installation, and the heat radiation characteristic should be changed according to the illuminance of the LED. In view of this point, the conventional street lamp as described above has a problem that it is difficult to realize a lamp assembly having compatible heat dissipation characteristics, and the degree of design freedom can not be increased accordingly.

In addition, since the head of the streetlight has a structure supported by a lantern, maintenance is difficult in case of an abnormality. In particular, in order to replace the module when an error occurs in the LED module mounted on the head, all of the head assemblies must be removed, resulting in a problem that the workability is relatively reduced.

In addition, since the conventional street light head has a structure in which heat is dissipated only by the heat radiator formed in the LED module, the volume of the heat radiator formed in the LED module must be large, which is disadvantageous in weight reduction and cost reduction.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a structure in which heat generated in a unit LED module is transferred to a housing, thereby reducing the size of a heat radiator formed in a standardized unit LED module according to a calorific value, Accordingly, it is an object of the present invention to provide an LED light head which can secure a wide area heat radiator, ensure the reliability without deteriorating the heat radiating effect, contribute to weight reduction and cost reduction.

According to an aspect of the present invention, there is provided an LED headlamp comprising: a housing having an inner space and an open bottom; A base portion coupled to an open lower portion of the housing and having an insertion hole; Unit LED modules inserted into the housing through the insertion holes, coupled by the base and the first coupling part, and installed in a space above the plurality of heat radiation fins; And a second coupling portion that couples with the unit LED module inside the housing.

A plurality of fixing brackets, one end of which is fixed to the housing or the base, and a plurality of fixing brackets protruding from the fixing bracket so that heat transmitted from the radiating fins can be transmitted to the fixing bracket, As shown in Fig.

And a third coupling portion for increasing a coupling force when the radiating fin and the coupling pin are engaged.

The third coupling portion includes a coupling protrusion formed on at least one radiating fin of the radiating fins and a pair of hooks formed in the fixing bracket to form a coupling groove for coupling with the coupling protrusion.

The fixing bracket includes a fixing part fixed to the housing, a recessed part extending from the fixing part to the inside of the housing and having concave and convex parts on the top and bottom, And a pin coupling portion formed at a lower portion thereof.

The fixing portion includes a body fixed to an inner surface of the housing by a fixing member and a protruding vault formed on one side of the body and protruding out of the housing through a side hole formed in a side surface of the housing.

Wherein the fixing bracket includes a fixing portion fixed to the base portion, a support portion formed to be inclined with respect to the fixing portion and seated on the base portion, and a fixing portion extending from the fixing portion to the inside of the housing, And a coupling portion.

The supporting portion is provided with a protruding lid protruding to the outside of the base through a bottom hole formed in the base portion.

As described above, according to the LED head of the present invention, the heat generated from the unit LED module can be transferred to the outer housing through the fixing bracket, thereby releasing heat to the outside.

Accordingly, the present invention can utilize the housing constituting the outside as a heat discharging body, so that even if the size of the heat discharging body formed in the unit LED module is reduced, the heat radiating effect is not lowered, thereby contributing to weight reduction and cost reduction. In addition, since the housing can be used as a heat discharging body, the amount of the heat discharging body can be maximized according to the amount of heat generated, thereby improving the heat releasing characteristic, and accordingly, the reliability of the lifetime extension of the LED can be enhanced.

Further, in the present invention, when the projecting feathers of the fixing brackets for connecting the unit LED module and the housing are exposed to the outside of the head, external air can be smoothly introduced to improve air permeability and heat dissipation effect.

In addition, since the unit LED module can be mounted or separated only in a state in which the head is assembled, construction and maintenance are very easy, and by the fixing structure of the unit LED module and the fixing bracket, It is possible to prevent accidents and to adjust the number of unit LED modules that emit light with the same or different illuminance.

FIG. 1 is a side view showing a state in which an LED head is installed according to an embodiment of the present invention,
Fig. 2 is an exploded perspective view of the head of the LED light applied to Fig. 1,
FIG. 3 is a cross-sectional view of the head of the LED light applied to FIG. 1,
FIG. 4 is a perspective view illustrating a main part of an LED head for a headlight according to another embodiment of the present invention,
FIG. 5 is a cross-sectional view of the head of the LED light source to which FIG. 4 is applied,
FIG. 6 is a perspective view illustrating a main part of an LED head according to another embodiment of the present invention,
FIG. 7 is a cross-sectional view of the LED light head to which FIG. 6 is applied,
FIG. 8 is a perspective view illustrating an essential part of an LED light head according to another embodiment of the present invention,
Fig. 9 is a cross-sectional view of an LED light head to which Fig. 8 is applied.

Hereinafter, an LED head according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, an LED head 10 according to an exemplary embodiment of the present invention is installed in a light-emitting diode (LED) or column 5 to emit light.

The LED headlight head 10 according to the present invention includes a housing 11, a base portion 20 coupled to the opened lower portion of the housing 11, a unit LED 20 coupled to the base portion 20 by the first coupling portion, Module 30, and a second coupling unit for mutually coupling with the unit LED module 30.

The housing (11) and the base (20) are vertically combined to form an outer frame of the LED head.

The housing (11) has an internal space portion and a lower open structure. At the bottom of the housing 11, a coupling step 13 is formed which is coupled with the base part 20.

In the present invention, the housing 11 is preferably formed of a metal material having a high thermal conductivity so that the housing 11 can be used as a part of the heat discharging body. For example, the housing may be formed of aluminum material or aluminum alloy. Although not shown, ventilation holes are formed on both sides of the housing 11 to smoothly induce airflow. A connecting rod (7) is provided on the rear surface of the housing (11). The connecting rod (7) is hinged to the housing (11). The connecting rod 7 is an installation end for allowing the head 10 to be installed at a desired position, and the connecting rod 7 is connected to the support.

The base portion 20 is formed in a plate shape. The base portion 20 is coupled to the open lower portion of the housing 11. The edge of the base portion 20 is joined to the lower portion of the coupling jaw 13 of the housing. The base portion and the coupling jaw can be fixed with screws.

The base 20 is formed with an insertion hole 23 into which the unit LED module 30 is inserted. In the illustrated example, four insertion holes 23 are formed at regular intervals. Alternatively, the insertion holes 23 may be formed of two, three, or more than two.

The unit LED module 30 is inserted into the housing 10 through the insertion hole 23 of the base 20. One or two or more unit LED modules 30 are installed. The unit LED module 30 may be inserted into each of the insertion holes 23 or the unit LED module 30 may be inserted into only some insertion holes of the insertion holes 23. [

Each unit LED module 30 includes a unit body 31, a circuit board 40 provided below the unit body 31, and a radiating fin 35 formed on the unit body 40.

The unit main body portion 31 includes a lower plate 32, ribs 33 vertically formed on the upper portion of the lower plate 32 and a connecting portion 34 connecting upper portions of the ribs 33 .

Fixing vanes 37 for fixing the base portion 20 are formed on both sides of the lower plate 32, respectively. A base plate 40 on which a light emitting diode 45 for illumination is mounted is installed on the bottom surface of the lower plate 32. The substrate 40 is preferably made of a metal PCB formed of a metal material to facilitate heat transfer.

A plurality of radiating fins 35 for emitting heat generated from the light emitting diodes 81 are installed at predetermined intervals on the connection portion 35. In the present invention, since the housing 11 is used as a part of the heat discharging body by the structure in which the heat generated in the unit LED module is transferred to the housing 11, the size and number of the heat discharging fins 35, Can be reduced. Even if the amount of the heat discharging body formed in the unit LED module is reduced, the heat radiating effect is not lowered. In addition, the amount of the heat dissipating member can be reduced, contributing to weight reduction and cost reduction of the product.

The first coupling unit for fixing the base unit 20 and the unit LED module 30 is configured to couple the fixed blade 37 formed in the unit body 31 of the unit LED module 30 and the base unit 20 And a screw (29). For this purpose, screw holes (38) and (27) are formed in the fixed blade (37) and the base (20), respectively.

The first coupling portion is not limited to the above-described embodiment, and various fixing devices for fixing the fixed blade 37 to the base portion 20 may be applied.

The second coupling unit is coupled to the unit LED module 30 in the housing 11 to increase the supporting force of the unit LED module 30 and to increase the supporting force of the unit LED module 45 generated from the light emitting diode 45 of the unit LED module 30. [ The heat is transferred to the fixing bracket 50 to be described later to improve the heat radiation characteristic.

For example, the second coupling portion may include a fixing bracket 50 having one side fixed to the housing 11 or the base portion 20, a fixing bracket 50 for allowing heat transmitted from the radiating fin 35 to be transmitted to the fixing bracket 50 50 are provided with engagement pins (57) formed to protrude.

The fixed bracket 50 is installed at a position spaced upward from the base 20. The two fixed brackets 50 are provided in a pair to be combined with one unit LED module 30. One of the pair of fixed brackets 50 is fixed to one side of the housing 11 and the other is fixed to the other side of the housing 11. [

The fixed bracket 50 includes a fixed portion 51, a recessed portion 53 extending upward from the fixed portion 51 into the housing and having concave and convex portions formed on the upper and lower portions thereof, And a pin engagement portion 55 extending to the inside.

The fixing portion 51 of the fixing bracket 50 is fixed to the inner surface of the housing 11. [ The fixing portion 51 is formed to have a sharp tip and is inserted into the coupling groove 17 formed on the inner surface of the housing 11. The fixing portion 51 can be fixed to the side surface of the housing 11 by the fixing member 59 in a state where the upper portion of the fixing portion 51 is inserted into the coupling groove 17. [ Screws can be used with the fixing member 59.

A plurality of engaging pins 57 are formed under the pin engaging portion 55. The engagement pins 57 are formed in a plate shape. The radiating fins (35) are fitted and coupled to the coupling pins (57). The distance between the coupling pins 57 is formed to be substantially equal to or smaller than the thickness of the radiating fins 35 so that the radiating fins 35 can be fitted and engaged between the coupling pins 57, (40).

It is preferable to further include a third coupling portion for increasing the coupling force when the radiating fin 35 and the coupling pin 57 are coupled.

The third coupling portion includes a coupling protrusion 40 formed on at least one of the radiating fins 35 of the radiating fins 35 and a pair of hooks 58 formed in the fixing bracket 50 and engaged with the coupling protrusion 40 . A pair of hooks (58) are formed at the lower portion of the pin fitting portion (57) of the fixed bracket (50). The pair of hooks 58 are positioned to face each other to form an engaging groove into which the engaging projection 40 can be inserted. When an external force is applied and the engaging projection 40 is pushed into the engaging groove, the engaging projection 40 is inserted into the engaging groove while the pair of hooks 58 are forcibly opened.

The third coupling unit improves the coupling force of the unit LED module 30 and prevents the unit LED module 30 from being separated.

The operation of the LED light head of the present invention will be described as follows.

The unit LED module 30 is inserted into the housing 11 through the insertion hole 23 of the base portion 20 in a state where the housing 11 having the fixing bracket 50 is coupled to the base portion 20, . In this process, the unit LED module 30 is fixed to the lower part of the base 20 by the first coupling part and the fixing blade 37 is fixed to the lower part of the base part 20 by the second coupling part, Are fitted between the coupling pins 57 of the pin coupling portion 55 so that the radiating fin 35 and the coupling pin 57 are coupled to each other. Particularly, since the coupling protrusion 40 formed on at least one of the radiating fins 35 is coupled to the hook 58 formed in the fixing bracket by the third coupling portion, even if the first coupling portion is disassembled, 10 can be prevented from being separated from the unit LED module 30 without applying an external force.

Further, in order to adjust the illuminance in the process of assembling the unit LED module 30, the number of the unit LED modules 30 may be adjusted or the unit illuminator module having high or low illuminance may be selected and assembled to easily adjust the design illuminance .

The above-described head 10 is mounted on the column 5 and illuminates the periphery by the light emitted from the light emitting diodes 45 of the unit LED modules 30. Heat generated from each light emitting diode 45 in the process of irradiating light transmits heat through the fixing bracket 50 and the housing 11 through the radiating fins 35, so that heat can be effectively radiated to the outside.

As described above, according to the present invention, the housing 11 which is in contact with the outside air can be used as a part of the heat discharging body, thereby improving the heat releasing characteristic, and accordingly, the reliability of the life of the LED can be increased. In addition, even if the size and number of the heat radiating fins formed in the unit LED module 30, that is, the amount of the heat discharging body, are reduced, the heat radiation effect is not lowered, thereby contributing to weight reduction and cost reduction.

On the other hand, an LED light head to which another example of the fixed bracket is applied is shown in Fig. 4 and Fig.

4 and 5, the fixed bracket 60 shown in the figure has a fixing part 61 fixed to the housing 11 and a fixing bracket 60 extending from the fixing part 61 to the inside of the housing 11, A concave and convex portion 64 formed with concave and convex portions and a pin fitting portion 65 extending to the inside of the housing 11 from the concave and convex portion 64 and having a pair of hooks 58 and engagement pins 57 formed at the bottom .

The fixing portion 61 includes a body 62 fixed to the inner surface of the housing 11 by a fixing member 59 and side holes 61 formed on one side of the body 62 and formed on the side surface of the housing 11 And a protruding vane 63 protruding out of the housing 11 through the protruding vane 63. The side holes 19 are formed on the left and right sides of the housing 11 as many as the number of the unit LED modules 30.

The fixed bracket 60 is positioned inside the housing 11 and then the protruding vane 63 is protruded into the side hole 19 and then the body 62 is fastened to the housing 11 Fix it on the side. Then, the base unit 20 is coupled to the lower portion of the housing 11, and then the unit LED module 30 is inserted and inserted into the insertion hole of the base unit 20.

The present invention exposes the protruding vanes of the fixing bracket connecting the unit LED module and the housing to the outside of the head through the side holes 19, thereby enhancing the breathability and the heat releasing effect.

In addition to the components described above, the remaining components are the same as in the embodiment of Figs.

6 and 7 show an LED light head to which another embodiment of the fixed bracket is applied.

6 and 7, the fixing bracket 70 includes a fixing portion 71 fixed to the base portion 20, a supporting portion formed to be inclined with respect to the fixing portion 71 and seated on the base portion 20 And a pin coupling portion 77 extending horizontally from the upper end of the fixing portion 71 to the inside of the housing 11 and having a pair of hooks 58 and coupling pins 57 formed thereunder.

A fixing plate 72 fixed to the base portion 20 is formed at a lower portion of the fixing portion 71. The fixing plate 72 is in contact with the upper surface of the base portion 20. The fixing plate 72 is fixed to the base portion 20 by a screw which is a fixing member 79.

A plate-like support plate 74, which is seated on the upper surface of the base portion 20, is formed at the lower portion of the support portion 73. The support plate 74 increases the contact area of the support portion 73 with respect to the base portion 20.

The fixing bracket 70 is placed on the upper portion of the base portion 20 and then the fixing plate 72 of the fixing portion 71 is fixed to the base portion 20 with screws which are the fixing member 79. Then, the base unit 20 is coupled to the lower portion of the housing 11, and then the unit LED module 30 is inserted and inserted into the insertion hole of the base unit 20.

In addition to the components described above, the remaining components are the same as in the embodiment of Figs.

8 and 9 show an LED light head to which another embodiment of the fixed bracket is applied.

8 and 9, the fixed bracket 80 includes a fixed portion 81 fixed to the base portion 20, a support portion formed to be inclined with respect to the fixed portion 81 and seated on the base portion 20 And a pin coupling portion 87 extending horizontally from the upper end of the fixing portion 81 to the inside of the housing 11 and having a pair of hooks 58 and engagement pins 57 formed at the lower portion thereof.

A fixing plate 82 fixed to the base portion 20 is formed at a lower portion of the fixing portion 81. The fixing plate 82 is in contact with the upper surface of the base portion 20. The fixing plate 82 is fixed to the base portion 20 by a screw which is a fixing member 89.

A plate-shaped support plate 84, which is seated on the upper surface of the base portion 20, is formed at the lower portion of the support portion 83. The support plate 84 increases the contact area of the support portion 83 with respect to the base portion 20. Further, a protruding vane 85 formed to be bent downward from one side of the support plate 84 is further provided. The projecting vanes 85 are projected to the outside of the base portion 20 through a bottom hole 29 formed in the base portion 20. Two unit holes 29 are formed in the unit LED module 30 so as to be spaced apart from each other.

The fixing bracket 80 is positioned inside the housing 11 and then the protruding vane 85 is protruded into the bottom hole 29 and then the fixing plate 89 is screwed into the fixing plate 82 Is fixed to the base portion 20. Then, the base unit 20 is coupled to the lower portion of the housing 11, and then the unit LED module 30 is inserted and inserted into the insertion hole of the base unit 20.

The present invention exposes the protruding vanes of the fixed bracket to the outside of the head through the bottom hole 29, thereby enhancing the ventilation and heat releasing effect.

In addition to the components described above, the remaining components are the same as in the embodiment of Figs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention. . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

5: Support 10: Head
11: housing 13: coupling jaw
20: base portion 23: insertion hole
30: unit LED module 31:
35: radiating fin 40: engaging projection
50: fixed bracket 57: engaging pin

Claims (8)

delete A housing having an inner space and open at the bottom;
A base portion coupled to an open lower portion of the housing and having an insertion hole;
Unit LED modules inserted into the housing through the insertion holes, coupled by the base and the first coupling part, and provided with a plurality of radiating fins spaced apart from each other;
And a second coupling unit that couples with the unit LED module inside the housing,
A plurality of fixing brackets, one end of which is fixed to the housing or the base, and a plurality of fixing brackets protruding from the fixing bracket so that heat transmitted from the radiating fins can be transmitted to the fixing bracket, And an engaging pin for engaging the engaging pin. The LED head according to claim 2, further comprising a third coupling portion for increasing a coupling force when the radiating fin and the coupling pin are coupled. [5] The apparatus of claim 3, wherein the third coupling unit includes a coupling protrusion formed on at least one radiating fin of the radiating fins, and a pair of hooks formed in the fixing bracket to form a coupling groove for coupling with the coupling protrusion LED headlight head. [3] The apparatus according to claim 2, wherein the fixing bracket comprises: a fixing part fixed to the housing; a concave / convex part extending from the fixing part to the inside of the housing, And wherein the coupling pins have a pin engagement portion formed at a lower portion thereof. [6] The apparatus as claimed in claim 5, wherein the fixing unit comprises: a body fixed to an inner surface of the housing by a fixing member; a protruding feathers formed on one side of the body and projecting to the outside of the housing through side holes formed in a side surface of the housing; And a light emitting diode (LED). [3] The apparatus according to claim 2, wherein the fixing bracket comprises: a fixing part fixed to the base part; a support part inclined with respect to the fixing part to be seated on the base part; And a pin coupling portion formed on the lower side of the pin. 8. The LED headlight head according to claim 7, wherein the support portion is provided with a protruding lid protruding to the outside of the base portion through a bottom hole formed in the base portion.

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