KR101662257B1 - Led lighting apparatus - Google Patents

Abstract

The present invention relates to an LED (light emitting diode) lamp, and more particularly, to an LED lamp including an LED illumination unit and an air cap formed in close contact with the LED substrate.
An LED luminaire is provided in accordance with an embodiment of the present invention. The LED lighting unit includes: an LED lighting unit including at least one LED module; And a housing part accommodating at least a part of the LED illumination part, wherein the LED module comprises: a LED substrate part including a printed circuit board (PCB) and at least one LED element disposed on one side of the PCB; At least one air cap corresponding to the LED element and formed in close contact with the PCB; And a reflector part formed in close contact with the air cap and having at least one reflector hole corresponding to the arrangement of the LED elements.

Description

LED LIGHTING APPARATUS

The present invention relates to an LED (light emitting diode) lamp, and more particularly, to an LED lamp including an LED illumination unit and an air cap formed in close contact with the LED substrate.

Conventionally, a fluorescent lamp has been widely used as means for providing visible light. In recent years, the use of LED (light emitting diode) lamps has been increasing in place of fluorescent lamps due to problems of eye fatigue, heat generation, life span and power loss.

LED is excellent in efficiency of converting power into light and has high efficiency compared to incandescent lamp, fluorescent lamp and compact fluorescent lamp, which are currently used lighting apparatuses, and is highly economical, and also obtains high efficiency illumination at low voltage It has the advantage of less glare, less scattering of light and superior stability. For this reason, it is widely used not only in various fields such as various landscape lighting and advertisements, but also as a traffic signal lamp and a home lamp.

However, in order to provide a lighting unit of a required size or brightness according to the installation position of the LED lighting fixture, there is a problem in that the conventional LED lighting fixture has a problem in that the manufacturing cost is relatively high as compared with the conventional fluorescent lighting fixture or incandescent lamp fixture, There is a problem in time and cost in the production of the separate LED lighting units.

In addition, a conventional LED lighting fixture may cause a clearance due to tolerance or an assembly error between the LED and the heat-dissipating component at the time of manufacture, and may be deformed according to use, resulting in deterioration of heat dissipation efficiency. a separate cushioning material such as a silicon pad is required to prevent noise between the printed circuit board and the socket portion. In addition, due to the heat generated by the LED, dust in the air is introduced into the gap between the PCB and the socket, thereby causing contamination of the luminaire, thereby lowering the light quantity of the LED lamp.

KR 10-2013-0052796 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED lighting unit including LED modules and an air cap formed in close contact with the LED substrate.

An LED luminaire is provided in accordance with an embodiment of the present invention. The LED lighting unit includes: an LED lighting unit including at least one LED module; And a housing part accommodating at least a part of the LED illumination part, wherein the LED module comprises: a LED substrate part including a printed circuit board (PCB) and at least one LED element disposed on one side of the PCB; At least one air cap corresponding to the LED element and formed in close contact with the PCB; And a reflector part formed in close contact with the air cap and having at least one reflector hole corresponding to the arrangement of the LED elements.

Preferably, the air cap is tightly coupled between the upper end of the reflector portion and the PCB, thereby sealing the internal space between the air cap and the PCB.

Also, preferably, the air cap can be expanded as the temperature of the internal space rises due to heat generation of the LED element.

Also, preferably, the reflector portion is provided so as to correspond to the arrangement of the LED elements and has at least one opening for exposing at least a part of the LED element and the air cap downward.

The LED module may further include a heat dissipation unit coupled to the other surface of the PCB to emit heat generated from the LED substrate unit.

Also, preferably, the at least one LED module is detachably coupled to each other to form the LED illumination part.

Also preferably, the housing portion comprises: a rear base portion; A side cap portion that shields both open sides of the rear base portion; And a front base part coupled to the rear base part and the side cap part to detachably receive at least a part of the LED illumination part.

Also preferably, the front base portion includes a plurality of base plates, and the LED illumination portions may be disposed between the base plates, respectively.

Also, preferably, the length and width of at least one of the rear base portion, the side cap portion, and the base plate may be differently applied depending on the number and the coupling structure of the LED modules provided in the LED illumination portion.

Preferably, the power supply unit further includes a power supply unit disposed in one of the upper surfaces of the base plate.

Also, preferably, at least one of both ends of the base plate on which the LED illumination unit is disposed may be formed with a coupling groove into which at least a part of the periphery of the reflector unit is inserted.

Preferably, the engaging grooves are formed by continuously arranging a plurality of depressions having different depths, at least a portion of the periphery of the reflector portion being inserted into one of the plurality of depressions, And can be coupled to the base plate by being inserted into another one of the plurality of depressions.

According to the present invention, each LED lighting unit is combined by coupling one or more LED modules, so that the LED lighting unit can be easily expanded in size and number so as to meet the requirements such as light intensity according to the installation position of the LED lighting fixture . In addition, when some of the LED modules constituting the LED illumination unit fail, only the failed LED module can be easily separated and replaced, thereby minimizing maintenance and repair costs.

Further, according to the present invention, by implementing the LED lighting unit and the housing unit having a simple structure that is easy to assemble and detach, it is possible to minimize the time, cost and effort required for manufacturing the LED lighting fixture, have.

According to the present invention, by providing the LED substrate portion and the air cap formed in close contact with the reflector portion, it is possible to reduce noise between the LED substrate portion and the reflector portion and to prevent dust from entering between the LED substrate portion and the reflector portion It is possible to protect the LED module from external contamination. In addition, there is an effect that a natural light distribution can be formed by the convex expansion of the air cap according to the heat of the LED element.

Further, according to the present invention, there is an effect of maximizing the efficiency as a light because it has a structure capable of efficiently arranging and condensing a plurality of LEDs.

BRIEF DESCRIPTION OF THE DRAWINGS A brief description of each drawing is provided to more fully understand the drawings recited in the description of the invention.
1 shows a perspective view of an LED lamp according to an embodiment of the present invention.
2 is an exploded perspective view of an LED lamp according to an embodiment of the present invention.
Figure 3 shows a side cross-sectional view of an LED luminaire according to an embodiment of the invention
FIG. 4 shows a vertical coupling relationship of LED modules in an LED lamp according to an embodiment of the present invention.
FIG. 5 illustrates a mutual coupling relationship among LED modules in an LED lamp according to an embodiment of the present invention.
Figure 6 shows an enlarged view of a portion A of a side section view of an LED luminaire according to an embodiment of the invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 is a perspective view of an LED lamp according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of an LED lamp according to an embodiment of the present invention. Figure 3 also shows a side cross-sectional view of an LED luminaire according to one embodiment of the present invention

1 to 3, an LED lamp 1000 according to an exemplary embodiment of the present invention may include at least one LED illumination unit 100, a housing unit 200, and a power supply unit 300.

The LED lighting unit 100 may be implemented as one or more, and preferably two, as shown in FIGS. 1 to 3, and may be spaced apart from the housing unit 200 at predetermined intervals. The LED lighting unit 100 may include at least one LED module 110. The LED modules 110 may be formed by closely bonding the LED substrate unit 112, the air cap 114, and the reflector unit 116).

The LED substrate portion 112 may include a PCB (printed circuit board) 112-1 and at least one LED element 112-2 disposed on one side of the PCB 112-1. Here, the PCB 112-1 is a printed circuit board with a predetermined circuit pattern printed on an insulating plate such as plastic. The PCB 112-1 electrically connects the LED device 112-2 and / or the LED module 110, To each of the LED elements 112-2. At this time, the LED element 112-2 may be fixed on the PCB 112-1 by, for example, a soldering method. The LED substrate unit 112 may be implemented in various types of substrates that can mount the LED device 112-2 such as a metal core PCB, a flexible PCB, and a ceramic PCB in addition to a normal PCB. Meanwhile, the surface of the LED substrate portion 112 may be transparently coated to prevent moisture or dust.

The air cap 114 may be disposed to correspond to at least one LED element 112-2 formed on the LED substrate unit 112 and may be formed in close contact with the PCB 112-1. 6, the air cap 114 expands in accordance with the heat generated by the LED element 112-2 and transmits the light emitted from the LED element 112-2, For example, a flexible transparent material having elasticity such as a silicon material. 2, one or more air caps 114 are shown as being integrally connected to each other. However, the air caps 114 may be formed separately from the air caps 114, The bonding form can be varied in various ways.

The reflector portion 116 may be provided closely to the air cap 114 and may include at least one reflector hole 116-1 corresponding to the arrangement of the LED elements 112-2. At this time, each of the reflector holes 116-1 may have various shapes capable of appropriately reflecting the light emitted from the LED element 112-2, for example, a quadrangular pyramid shape or a conical shape with its top cut off . Also, at least a part of the inner surface of the reflector hole 116-1 may be coated or surface-treated with a material having a high reflectance so as to condense the light emitted from the LED element 112-2 and reflect it in a proper direction. The angle formed by the inner surface of the reflector hole 116-1 can be selectively made according to the degree of light condensation from each LED element 112-2 so as to minimize the user's glare of the LED lamp 1000 have.

The reflector portion 116 has at least one opening 116-2 into which the light emitting portion of the LED substrate portion 112, that is, at least a part of the LED element 112-2 and the air cap 114 is inserted downward can do. Through these openings 116-2, the convex portions of the air cap 114 that accommodates the LED element 112-2 and the LED element 112-2 are arranged such that, as shown in Fig. 3, Exposed to the lower side of the reflector holes 116 and located at the central portions of the respective reflector holes 116-1.

The at least one LED module 110 constituting each LED illumination unit 100 may be detachably coupled to each other. At this time, the structure and / or length of the LED illumination unit 100 may be changed according to the number and the structure of the LED modules 110 to be coupled to each other. The specific coupling structure between the LED modules 110 will be described below with reference to FIG.

Although not shown in FIGS. 1 to 3, according to an embodiment, the LED module 110 further includes a heat dissipating unit (not shown) coupled to the other surface of the PCR 112-1 of the LED substrate unit 112 . Here, the heat dissipating unit (not shown) discharges the heat generated from the LED substrate unit 112 to the outside to improve the deterioration of the light efficiency and life of the LED device 112-2 due to heat generation. When the required power of the LED element 112-2 is large or the amount thereof is large, the heat dissipation unit (not shown) may be formed to have a larger size. The heat dissipating unit (not shown) may be formed of a plate-like member having a substantially rectangular shape corresponding to the width and shape of the LED substrate unit 112, and may be formed of a metal material having high heat transfer performance. The material of the heat dissipating unit (not shown) may be made of an alloy material including copper (Cu) or aluminum (Al), but it is not limited thereto and may be made of various materials capable of implementing a heat dissipation function. The heat radiating part (not shown) may include at least one radiating fin protruding upward. The radiating fins are members for widening the contact area with air and facilitating heat dissipation. The radiating fins are preferably protruded in a rib shape and arranged to be opened in the width direction or the length direction, And can be formed in various shapes.

The housing part 200 is a member that forms an outer appearance of the rear surface, the side surface, and the front surface of the LED lamp 1000, and can accommodate at least a part of the LED lighting part 100 in the inner space. The housing part 200 includes a rear base part 210, a side cap part 220 that shields both open sides of the rear base part 210, and a front side base part 220, which is combined with the side cap part 220 and accommodates at least a part of the LED lighting part 100. [ (230). ≪ / RTI > At this time, the LED illumination unit 100 may be detachably coupled to one area of the front base unit 230 while at least a part of the LED illumination unit 100 is accommodated in the interior space.

The front base portion 230 may be composed of a plurality of base plates 232 and 234. For example, as shown in FIGS. 2 and 3, the plurality of base plates 232 and 234 may include two side plates 232 and one center plate 232, which are respectively coupled to both sides of the rear base unit 210, And a plate 234. Each of the LED lighting units 100 may be disposed between the plurality of base plates 232 and 234 constituting the front base 220 and may be detachably coupled to the front base 230. 3, the LED lighting unit 100 includes a base plate 232 and a base plate 234. The base plate 232 and the base plate 234 may be formed with coupling grooves 236 at one or both ends thereof. The LED illumination unit 100 can be detachably coupled to the adjacent base plates 232 and 234 by inserting at least a part of the peripheral portions 116-4 of the LED illumination units 116 into the engagement recesses 236. [

The length and width of the rear base 210, the side cap 220 and the plurality of base plates 232 and 234 constituting the housing part 200 are equal to the length and width of the LED module 110 constituting the LED illumination part 100 The number and the coupling structure. 1 to 3, two LED illumination units 100 are shown as being disposed between the three base plates 232 and 234, but this is illustrative only and the LED illumination unit 100 and the base plate 232 And 234 may be variously modified according to the embodiment to which the present invention is applied.

The power supply unit 300 is a device that allows high voltage AC power to flow from the outside to generate and supply DC power of an appropriate voltage to the LED lighting unit 100. The rectifier circuit and the Switching Mode Power Supply ) Module. Here, the rectifier circuit is for converting the inputted external AC power to DC and delivering it to the SMPS module. For example, it may be implemented as a full-wave rectifier circuit. On the other hand, the SMPS module can reduce the high voltage input voltage received from the rectifier circuit to a voltage usable in the LED lighting unit 120. In this case, the SMPS module can be implemented as an exchange-type power supply device that converts a DC input voltage into a square-wave voltage using a semiconductor device as a switch, and obtains a DC output voltage controlled through the filter. However, it is needless to say that various devices other than the power supply unit 300 can be selectively used as long as it can change the waveform and voltage of external power.

The power supply unit 300 may be disposed in one of the upper surfaces of the base unit 220, as shown in FIG. As described above, the LED lighting apparatus 1000 according to an embodiment of the present invention minimizes the height of the LED lighting apparatus 1000 by disposing the power supply unit 300 horizontally with the LED lighting unit 100, unlike the conventional lighting apparatus So that a more compact luminaire can be realized. The power supply unit 300 may be provided in the same number as that of the LED illumination unit 100 so as to supply voltages to the LED illumination unit 100, respectively. However, according to the embodiment, the number of the power supply units 300 can be variously changed by implementing one power supply unit 300 to supply the plurality of LED lighting units 100 with the same voltage at the same time.

According to an embodiment, the LED lamp 1000 according to an embodiment of the present invention may further include a protective cover 400 disposed to cover a lower surface of the reflector portion 116. [ At this time, the protective cover 400 may be made of a variety of materials and colors so as to select the transmittance of light generated from the LED element 112-2, and may preferably be made of a light transmitting material.

The protective cover 400 may be detachably coupled to the front base portion 230. In order to engage with the protective cover 400, the engaging groove 236 may be configured to have a stepped shape by disposing a plurality of depressions having different depths from each other in succession. In other words, for example, as shown in Fig. 3, the coupling recesses 236 can have two depressions successively arranged to form a two-step step shape. At this time, after at least a portion of the peripheral portions 116-4 of the reflector portion 116 is inserted into one of the plurality of depressions, a portion of the protective cover 400 is inserted into the other one of the depressions, The cover 400 may be detachably coupled to the base plates 232 and 234. Specifically, when the engaging groove 236 is composed of two concave portions continuously arranged, at least a part of the circumferential portion 116-4 of the reflector portion 116 is inserted into the depression at the upper end, After the cover plate 232 and the cover plate 234 are coupled with each other, the protective cover 400 is inserted into the depression at the bottom of the reflector portion 116 so as to be in close contact with the lower surface of the reflector portion 116, .

According to the embodiment, the protective cover 400 may be configured to be detached from the LED lighting fixture 1000 in a completely assembled state. That is, the depression to which the protective cover 400 is coupled may be exposed through one side or both sides of the housing part 200 even after the LED lamp 1000 is assembled. Accordingly, the user can easily insert the protective cover 400 into the depression, which is exposed through one side or both sides of the housing part 200, in a sliding manner in a state where the LED lamp unit 1000 is assembled, And can be attached to or detached from the base portion 230. Foreign matter such as dust can be prevented from flowing into the inside of the reflector hole 116-1 through the protective cover 400. [ In addition, since the protective film 400 is easily detachable from the front base 230, it is possible to easily select the emission color or intensity of the LED lamp 1000.

The process of fabricating the LED lamp 1000 according to an embodiment of the present invention is summarized as follows.

The peripheral portion 116-4 of the reflector portion 116 provided in each LED illumination portion 100 is fitted into the coupling groove 236 provided in the base plates 232 and 234 so that the LED illumination portion 100 Can be detachably coupled to the front base portion 230. [ At this time, the protective cover 400 covering the lower surface of the reflector unit 116 may be mounted together with the front base unit 230 when the LED illumination unit 100 is coupled. The number, length and width of the base plates 232 and 234 may be differently applied depending on the number of the LED lighting units 100, the number of LED modules 110 constituting the LED lighting unit 100, have.

Next, the power supply unit 300 can be disposed in one of the upper surfaces of the front base unit 230. [ The power supply unit 300 may be disposed at a position close to the power supply connection terminal (112-5 of FIG. 5) of the LED illumination unit 100, preferably to facilitate the connection of the power supply line. Thereafter, the LED lamp 1000 according to an embodiment of the present invention can be completed by combining the rear base 210 with the site plate 232 and by combining the side cap portion 220 to shield both open sides. have. At this time, in order to increase the fixation force of the LED illumination unit 100, an additional fixing member such as a screw may be passed through the rear base unit 210 to be fastened to the coupling unit formed on the reflector unit 116 or the like have.

As described above, the LED lighting unit 1000 according to an embodiment of the present invention realizes the LED lighting unit 100 and the housing unit 200 having a simple structure that facilitates assembly and separation, It is possible to minimize the time, cost, and effort required for maintenance and repair.

FIG. 4 shows a vertical coupling relationship of LED modules in an LED lamp according to an embodiment of the present invention. Fig. 4 shows an exploded perspective view of a part of the LED module for simplicity of explanation.

4, each of the LED modules 110 constituting the LED illumination unit 100 is configured such that the LED substrate unit 112, the air cap 114, and the reflector unit 116 are successively joined by the engagement member 10 And they can be formed by being in tight contact with each other. Specifically, when the engaging member 10 passes through the holes formed in the LED substrate portion 112 and the at least one air cap 114 and then passes through at least one engaging groove 116-3 formed in the reflector portion 116 The LED substrate portion 112, the air cap 114, and the reflector portion 116 can be tightly coupled to each other. Here, the engaging member 10 may be a fastening means such as a screw, and the fastening groove 116-3 may be a member such as a nut that engages with a screw-shaped projection. However, this is an exemplary one, and the engaging member 10 and the engaging groove 116-3 can be modified and applied to various types of fastening means known to those of ordinary skill in the art.

The air cap 114 is tightly coupled between the upper end of the reflector portion 116 and the PCB 112-1 through the coupling member 10 and the coupling groove 116-3 so that the air cap 114, (Not shown). The LED device 112-2 may be accommodated in the sealed inner space. For this purpose, the air cap 114 may be formed in such a manner that a portion corresponding to each of the LED elements 112-2 protrudes convexly have.

This air cap 114 serves as a buffer between the PCB 112-1 and the upper end of the reflector portion 116 to reduce noise generated at the temperature difference between the PCB 112-1 and the reflector portion 116 . The air cap 114 is also provided for preventing contamination of the lamp caused by the inflow of dust in the air through the gap between the PCB 112-1 and the reflector portion 116 due to the heat generated by the LED element 112-2, And the like can be solved.

FIG. 5 illustrates a mutual coupling relationship among LED modules in an LED lamp according to an embodiment of the present invention.

As shown in FIG. 5, each of the LED illumination units 100 may be configured such that one or more LED modules 110 are detachably coupled to each other. At least one of both ends of the LED substrate portion 112 provided in each LED module 110 is provided with a female connector terminal 112-3 or a male connector 112-3 for electrically connecting the LED modules 110, Terminal 112-4 may be formed. Therefore, at least a part of the male connector terminal 112-4 provided at one end of one LED module 110 is inserted into the female connector terminal 112-3 provided at one end of the other LED module 110 By way of example, the two LED modules 110 can be electrically connected and detachably coupled. In the meantime, although two LED modules 110 are shown in FIG. 5 as constituting each LED lighting unit 100, the LED lighting unit 100 according to an embodiment of the present invention is not limited thereto. Only the LED module 110 or three or more LED modules 110 may be combined with each other. According to the embodiment, an auxiliary coupling part such as a fitting projection or an insertion groove may be formed at one end or both ends of the LED module 110 to assist coupling between the LED modules 110 .

At least one of the mutually coupled LED modules 110 may have a power connection terminal 112-5 for connecting a power line. The LED lighting unit 100 can receive the voltage for the light emission of the LED element 112-2 from the power supply unit 300 through the power line connected to the power connection terminal 112-5.

As described above, the LED lighting apparatus 1000 according to an embodiment of the present invention can realize the LED lighting unit 100 by combining one or more LED modules 110, It is possible to easily implement the LED lighting unit 100 of the size and the number that meet the requirements such as strength and the like. In addition, when some of the LED modules 110 constituting the LED illumination unit 100 fail, only the failed LED module 110 can be easily separated and replaced, thereby minimizing maintenance and repair costs.

Figure 6 shows an enlarged view of a portion A of a side section view of an LED luminaire according to an embodiment of the invention.

Referring to FIG. 6, as the LED lamp 1000 operates and heat is generated in the LED element 112-2, the air cap 114 can be bulged. That is, when the air in the closed space is heated by the air cap 114 in which the LED element 112-2 is accommodated due to the heat generated by the LED element 112-2, the volume of the air is increased, The air cap 114 expands convexly. At this time, since the air cap 114 has to repeatedly expand and contract according to the operation of the LED element 112-2, it can be formed of a flexible and elastic material, for example, a silicone material, as described above . Further, the air cap 114 may be formed to a thickness enough to expand according to the heat generated by the LED element 112-2.

In the prior art, a plastic lens must be separately mounted to make the light distribution of the LED element 112-2, and a cushioning material such as a silicon pad is required to prevent noise between the PCB 112-1 and the reflector portion 116 The LED lamp 1000 according to an exemplary embodiment of the present invention may be constructed such that the air cap 114 is expanded due to the heat generated by the LED element 112-2 bonded onto the PCB 112-1, It is possible to provide a natural light distribution without using a separate plastic lens and noise between the PCB 112-1 and the reflector portion 116 can be prevented without a separate cushioning material.

In addition, the LED lamp 1000 according to an embodiment of the present invention can easily adjust the light amount and the irradiation angle of light by modifying the transparency and the thickness of the air cap 114.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope and spirit of the invention.

10: coupling member 100: LED lighting part
110: LED module 112: LED substrate part
112-1: PCB 112-2: LED element
112-3: female connector terminal 112-4: male connector terminal
112-5: Power connection terminal 114: Air cap
116: reflector unit 116-1: reflector hole
116-2: opening 116-3: fastening groove
116-4: circumference 200: housing part
210: rear base portion 220: side cap portion
230: front base portion 232, 234: base plate
236: Coupling groove 300: Power supply
400: Protective cover 1000: LED lamp

Claims (12)

An LED illumination unit having at least one light emitting diode (LED) module; And
And a housing portion for housing at least a part of the LED illumination portion inside,
The LED module includes:
An LED substrate part including a printed circuit board (PCB) and at least one LED element disposed on one side of the PCB;
At least one air cap corresponding to the LED element and formed in close contact with the PCB; And
And a reflector portion formed closely to the air cap and having at least one reflector hole corresponding to the arrangement of the LED elements,
Wherein the at least one LED module is detachably coupled to one another to form the LED illumination portion. The method according to claim 1,
Wherein the air cap is tightly coupled between the upper end of the reflector unit and the PCB to seal the inner space between the air cap and the PCB. 3. The method of claim 2,
Wherein the air cap is inflated as the temperature of the internal space rises due to heat generation of the LED element. 3. The method of claim 2,
Wherein the reflector portion is formed to correspond to the arrangement of the LED elements and has at least one opening for exposing at least a part of the LED element and the air cap downward. The method according to claim 1,
Wherein the LED module further comprises a heat dissipation unit coupled to the other surface of the PCB to emit heat generated from the LED substrate unit. delete The method according to claim 1,
The housing portion includes a rear base portion; A side cap portion that shields both open sides of the rear base portion; And a front base portion coupled to the rear base portion and the side cap portion to detachably receive at least a part of the LED illumination portion. 8. The method of claim 7,
Wherein the front base portion includes a plurality of base plates, and the LED illumination portion is disposed between the base plates. 9. The method of claim 8,
Wherein a length and a width of at least one of the rear base portion, the side cap portion, and the base plate are differently applied depending on the number and the coupling structure of the LED modules provided in the LED illumination portion. 9. The method of claim 8,
Further comprising a power supply unit disposed in one of upper surfaces of the base plate. 9. The method of claim 8,
Wherein at least one of both end portions of the base plate on which the LED illumination unit is disposed is formed with a coupling groove into which at least a part of the periphery of the reflector unit is inserted. 12. The method of claim 11,
And a plurality of recesses having different depths from each other are successively arranged so that at least a part of the circumferential portion of the reflector portion is connected to the recesses of the plurality of depressions And a part of the protective cover is coupled to the base plate by being inserted into the other one of the plurality of depressions.

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