KR100880199B1 - Street light using led - Google Patents

Abstract

A LED(Light Emitting Diode) streetlight is provided to maximize heat dissipation efficiency by forming a plurality of heat-radiating protrusions in an inside of a heat-radiating member. An LED streetlight includes a top cover(10), a bottom cover(20), a heat-radiating member, an LED module, a reflector, and a fixing cap. The bottom cover is coupled with the top cover. The heat-radiating member is coupled with a fixing pat of the top cover. The heat-radiating member includes a base, a wall, and a plurality of heat-radiating protrusions. The heat-radiating protrusions are formed at the outside of the wall. The LED module is coupled with the base of the heat-radiating member. The reflector is arranged in a loading part of the heat-radiating member. The fixing cap includes a guide part, first and second pressing parts, and a corresponding coupling part. The guide part is inserted between the wall and reflector of the heat-radiating member. The first and the second pressing parts are used for pressing a lower flange of the reflector and a lower flange of the wall. The corresponding coupling part corresponds to a second coupling part of the heat-radiating member. The fixing cap is coupled with the second coupling part of the heat-radiating member.

Description

LED street light with improved assembly {STREET LIGHT USING LED}

The present invention relates to an LED street light, the heat dissipation member is coupled to each of the fixed portion of the top cover, and the operation and failure of the LED module including the PCB coupled to the base of the heat dissipation member easy and easy to replace and repair In order to,

The heat-dissipating member, the reflector, the light-transmitting protective member, and the fixing unit are formed by separating and coupling the reflector arranged in the settled portion of the heat-dissipating member and the corresponding fastening portion of the fixing cap coupled to the second fastening portion of the heat-dissipating member. The cap can be fixed and detached at one time for easy and easy follow-up management of the street lamp, and the assembly and economical efficiency can be improved by minimizing the number of each component constituting the street lamp.

Furthermore, it is coupled to the base of the heat dissipation member of the LED module and forms a plurality of heat dissipation protrusions on the outside of the heat dissipation member, and the top cover and the bottom cover are made of aluminum, and at the same time, heat dissipation fins are formed on the top cover to maximize heat dissipation efficiency. The LED street light is improved to be assembled.

In general, street lights are lighting facilities installed along the street for the safety and security of street traffic. Such street lights are installed on highways, main roads of commercial areas, commercial roads, and residential district roads. Accordingly provided in a suitable form.

In addition, in the case of a conventional street light, the use of a light source, which is a high power consumption light bulb, away from the problem of high power consumption, and is now being replaced with a street light using LED that is low power consumption, high light efficiency and semi-permanent use. .

And in the case of the LED street light is installed in the outdoors, most of the case is installed to have a certain height by the support or support frame,

In this case, replacement and repair work due to failure or breakdown of the LED and other accessories provided in the street lamp is also often performed on the spot where the street lamp is installed.

Therefore, the replacement and repair work of the street light components as described above is performed by the worker to climb up a certain height by using a mechanism such as a ladder or a lift, in which case each component constituting the street lamp is complex, or the combination thereof is complicated In this case, the replacement and repair work is not easy.

Conventional lighting as described above is registered Patent No. 10-0496522 (Nov. 13, 2005) registered by Nuri Plan Co., Ltd. "LED lighting" is a lighting effect and heat dissipation effect, and the airtight, waterproof and dustproof effect between the components It is proposed to extend the life of LED lighting.

However, since the registered patent is too many and complicated, and the combination is fastened by bolts or screws, respectively, it is not easy to assemble and dismantle the LED lights, so it is easy to replace and repair each component for assembling and after-care. No,

In addition, each component constituting the LED lighting is too expensive, there is a problem that can give an economic burden to consumers.

The present invention has been made to solve the above problems,

In order to facilitate and simplify operations such as a heat dissipation member coupled to each fixing part of the top cover and an LED module including a PCC coupled to the base of the heat dissipation member in case of failure or damage,

The heat-dissipating member, the reflector, the light-transmitting protective member, and the fixing unit are formed by separating and coupling the reflector arranged in the settled portion of the heat-dissipating member and the corresponding fastening portion of the fixing cap coupled to the second fastening portion of the heat-dissipating member. Capable of fixing and detaching the cap at once, so that the after-sales management of the street lamp can be done easily and easily, and the assembly that can improve the assembly and economic efficiency by minimizing the number of each component constituting the street lamp. An object of the present invention is to provide an improved LED street light.

Furthermore, it is coupled to the base of the heat dissipation member of the LED module and forms a plurality of heat dissipation protrusions on the outside of the heat dissipation member, and the top cover and the bottom cover are made of aluminum, and at the same time, heat dissipation fins are formed on the top cover to maximize heat dissipation efficiency. It is another object of the present invention to provide an LED street light with improved assembly.

In addition, by arranging packing members for maintaining airtightness at each point where the heat dissipation member, the reflector and the fixing cap are coupled and connected to each other, the life of the street lamp is extended by ensuring the waterproof and moisture proof of the street lamp installed outdoors. Another object of the present invention is to provide an LED street light having improved assembly ability.

LED street light improved assembly according to the present invention

A top cover having a plurality of fixing parts protruding downward; A bottom cover coupled to the top cover and having a receiving portion formed to correspond to the fixing portion; A wall having a base having a first fastening part to be fixedly coupled to each of the fixing parts of the top cover, a second fastening part to be arranged and fixed to each receiving part of the bottom cover, and a settled part which is opened downward; Heat dissipation members including a plurality of heat dissipation protrusions formed on the outside of the wall; LED modules including a PCB coupled to the base of the heat dissipation member, and a plurality of LEDs mounted on the PCB; Reflectors arranged in the settled portion of the heat dissipation member and spaced apart from the wall; And a guide portion inserted between the wall of the heat dissipation member and the reflector, first and second press portions formed inside and outside the guide portion to press each of the reflector bottom flange and the heat dissipation member wall bottom flange, and the heat dissipation. And fixing caps having corresponding fastening portions corresponding to the second fastening portions formed on the wall of the member.

And a cable insertion hole is formed in the contact surface of the base and the wall of the heat dissipation member according to the present invention, a first annular groove for accommodating the packing member is formed directly below the insertion hole in the wall, inside the bottom flange of the wall A second annular groove for accommodating the packing member is formed, and the guide portion of the fixing cap presses the packing member located in the first annular groove, and the second press portion presses the packing member located in the second annular groove. do.

In addition, the reflector according to the invention is characterized in that it has a projection for spaced apart from the PCB of the LED module located in the base of the heat dissipation member.

Furthermore, the reflector according to the present invention further includes a mounting portion formed on the inner surface of the flange, and a light transmitting protective member formed on the outer side of the mounting portion and having a recess for accommodating the packing member, and positioned on the reflector mounting portion. The first pressing portion of the cap is characterized in that it has a groove for receiving the packing member.

In addition, the top cover and the bottom cover according to the present invention is made of an aluminum material for heat dissipation, characterized in that the heat dissipation fin is formed on the top of the top cover.

By LED street light with improved assembly according to the present invention

In order to facilitate and simplify operations such as a heat dissipation member coupled to each fixing part of the top cover and an LED module including a PCC coupled to the base of the heat dissipation member in case of failure or damage,

The heat-dissipating member, the reflector, the light-transmitting protective member, and the fixing unit are formed by separating and coupling the reflector arranged in the settled portion of the heat-dissipating member and the corresponding fastening portion of the fixing cap coupled to the second fastening portion of the heat-dissipating member. The cap can be fixed and detached at one time for easy and easy follow-up management of the street lamp, and the assembly and economical efficiency can be improved by minimizing the number of parts constituting the street lamp. .

Furthermore, it is coupled to the base of the heat dissipation member of the LED module and forms a plurality of heat dissipation protrusions on the outside of the heat dissipation member, and the top cover and the bottom cover are made of aluminum, and at the same time, heat dissipation fins are formed on the top cover to maximize heat dissipation efficiency. You can do it.

In addition, by arranging packing members for maintaining airtightness at each point where the heat dissipation member, the reflector and the fixing cap are coupled and connected to each other, the life of the street lamp is extended by ensuring the waterproof and moisture proof of the street lamp installed outdoors. Reliability can be guaranteed.

Hereinafter, with reference to the accompanying drawings, an LED street light improved assembly according to the present invention,

1 is a perspective view showing an LED street light according to the present invention,

Figure 2 is an exploded perspective view showing an LED street light according to the present invention,

3 is a cross-sectional view showing a combination of each configuration according to the present invention,

4 is a perspective view and a cross-sectional view showing a heat radiation member according to the present invention;

5 is a perspective view and a sectional view of the LED module according to the present invention;

6 is a perspective view and a sectional view showing a reflector according to the present invention;

7 is a perspective view and a sectional view showing a fixing cap according to the present invention;

8 is a perspective view showing the coupling of the heat dissipation member and the LED module according to the present invention;

9 is a perspective view showing a modification of another combination of the heat dissipation member and the LED module according to the present invention.

And in describing the present specification, a non-strict approximate direction is specified with reference to FIG. 1,

First, the top cover 10 of the street lamp is generally located above the ground of FIG. 1, but in this case, it is not easy to show the coupling relationship of each component, but the opposite of the direction in which the actual street lamp is installed is illustrated.

Hereinafter, in order to match the direction shown in FIG. 1 with the direction in which the actual street lamp is installed, the lower part of the ground on which the top cover 10 is located is designated as 'upper or upper or upper', and the bottom cover 20 is located The upper part of the ground is designated as 'lower or lower or lower'.

In addition, in the street lamp according to the present invention, a plurality of fixing parts 12 and receiving parts 22 formed on the top cover 10 and the bottom cover 20 are arranged, for example, three each of horizontal and vertical as shown in FIG. 1. Can be arranged or more or less,

And it is revealed that each configuration coupled to and arranged in each of the fixing portion 12 and the receiving portion 22 will have the same function and effect, unless stated to be formed in a specific position.

As shown in Figure 1 to 8 LED street light improved assembly according to the present invention is

The top cover 10, the bottom cover 20 coupled thereto, the heat dissipation member 30 coupled to the fixing part 12 of the top cover 10, and the base 32 of the heat dissipation member 30. Coupled to the LED module 40 coupled to the reflector 50 arranged on the settlement portion 34b of the heat dissipation member 30, and the second fastening portion 34a of the heat dissipation member 30. It comprises a fixing cap 60 for pressing and fixing the reflector 50.

1 to 8 in the LED street light according to the present invention, the top cover 10 is

It is made of a square frame made of aluminum, and may be formed in various shapes in consideration of the landscape depending on the outdoor or use place.

A plurality of fixing parts 12 protrude downward from the inside of the top cover 10,

The fixing part 12 has a plurality of fastening grooves 12a having a screw thread on an inner circumferential surface thereof, and a plurality of first fastening parts 32a and the LED module formed on the base 32 of the heat dissipation member 30. The coupling groove 42a formed in the PC 42 of the 40 is integrally coupled by a screwing method by the coupling screw B.

In addition, one side of the top cover 10 protrudes outward to form a connection portion (not shown), and the connection portion is formed on the bottom cover 20 in the same manner, and combines the top cover 10 and the bottom cover 20. In the case, a pair of connecting brackets (not shown) are formed to surround and fix the upper end of the street lamp post and the respective connecting portions (not shown) to fix the street lamp and the pillar (not shown).

In addition, the top cover 10 is formed with a coupling portion 14 provided with a screw thread on the inside with each fixing portion 12 therebetween,

The bottom cover 20 has a corresponding coupling portion 24 formed to correspond to the coupling portion 14 is coupled by a coupling screw (B).

1 to 8 in the LED street light according to the present invention, the bottom cover 20 is

It is preferably made of the same aluminum material as the top cover 10, and also has a shape corresponding to the shape of the top cover 10, it is formed in a shape inclined upwards.

In addition, a heat dissipation member (22) corresponding to the fixing portion (12) of the top cover (10) is formed inside the bottom cover (20) and is coupled to the fixing portion (12) of the top cover (10). 30, the LED module 40, the reflector 50 and the fixed cap 60 is accommodated, their specific combination and arrangement will be described below.

That is, the top cover 10 and the bottom cover 20 according to the present invention increase the heat dissipation efficiency by using an aluminum material having excellent thermal conductivity as described above, and further, a plurality of heat dissipation fins ( 16) can be formed to maximize the area for heat dissipation to further increase the heat dissipation efficiency.

In addition, the fixing part 12 of the top cover 10 and the receiving part 22 of the bottom cover 20 have the same row in the first, second, and third rows formed in the horizontal direction as shown in FIG. 1. If it is located in the same angle, and if it is located in a different row to form a different angle of inclination to change the irradiation direction of the LED 44 can be secured a wider range of irradiation,

If necessary, the inclination angles of the fixing part 12 and the receiving part 22 located in each matrix formed by the first, second and third rows in the horizontal direction and the first, second and third columns in the longitudinal direction. It is also possible to form so as to secure a wider than the irradiation range of the LED 44 by different from each other.

1 to 8, in the LED street light according to the present invention, the heat dissipation member 30 is

A base 32 having a first fastening part 32a for fastening to each of the fixing parts 12 of the top cover 10;

A wall 34 connected to the base 32 and having a second fastening portion 34a for fixing to the respective receiving portions 22 of the bottom cover 20 and a settled portion 34b opened downward; , And

It comprises a plurality of heat radiation projections 36 formed on the outside of the wall (34).

The first fastening portion 32a of the base 32 is formed in a plurality of grooves so as to correspond to the fastening groove 12a formed in the fixing portion 12 of the top cover 10, and the PCB of the LED module 40 is formed. The coupling groove 42a formed in the 42 and the coupling screw B are coupled by the screwing method.

Separation and coupling of the fixing part 12 and the heat dissipation member 30 and the LED module 40 of the top cover 10 can be performed at a time to improve the assemblability.

And the wall 34 is formed integrally with the base 32,

The wall 34 is formed on each receiving portion 22 of the bottom cover 20, and a second fastening portion 34a for engaging the fixing cap 60 is formed, and the wall 34 Is opened downward to form a settling portion 34b for accommodating the reflector 50.

In addition, the heat dissipation member 30 has first and second heat dissipation protrusions 36a and 36b formed on the upper and lower sides of the outer wall 34 to maximize the heat dissipation efficiency.

Furthermore, the second heat dissipation protrusion 36b is formed to be external to the accommodating part 22 of the bottom cover 20, and thus is exposed to the outside to maximize heat dissipation efficiency.

In addition, the second fastening part 34a is formed at a specific position among the second heat dissipation protrusions 36b, and serves to dissipate at the same time as the fixing cap 60.

In addition, the base 32 and the wall 34 is in contact with the cable insertion hole (34e) for the power cable 46 for the electrical connection of the LED module 40 is formed to protect the power cable 46 Become,

Flanges 34c and 34d are formed at the top and bottom of the wall 34, and the packing member P is accommodated inside the top flange 34c formed directly under the injection hole of the wall 34. A first annular groove 34c 'and a second annular groove 34d' for accommodating the packing member P are also formed inside the lower flange 34d of the wall 34.

That is, the packing member P is accommodated in the first annular groove 34c 'and the second annular groove 34d', and the guide part 62 and the second pressing part 66 of the fixing cap 60 will be described below. When the packing member P is pressurized by each of the), the street lamps installed outdoors can be waterproofed and damp-proofed in response to rainy weather or humid climate or environmental factors, thereby increasing the reliability of the product.

In the LED street light according to the invention as shown in Figure 1 to 8, the LED module 40 is

It comprises a PC 42 coupled to the base 32 of the heat dissipation member 30, and a plurality of LEDs 44 mounted on the PC 42,

A plurality of fastening grooves 42a as described above are formed in the PCB 42 and the first fastening portion 32a formed in the base 32 of the heat dissipation member 30 and the fixing portion of the top cover 10. It is coupled to the fastening groove (12a) formed in the screw fastening method by the coupling screw (B).

In addition, the LEDs 44 are mounted in a number of the PCs 42, and become a light source of the street lamp of the present invention, and the fixing portion 12 of the top cover 10 formed to have different inclination angles as described above. ) And the LED module 40 is coupled to the receiving portion 22 of the bottom cover 20 to increase the irradiation range by the LED 44.

1 to 8 in the LED street light according to the present invention, the reflector 50 is

It is arranged on the settlement portion 34b of the heat dissipation member 30, and is formed spaced apart from the wall 34 of the heat dissipation member 30,

A flange 52 is formed at an inner lower end of the reflector 50, and a mounting portion 54 is formed at an inner surface of the flange 52 of the reflector 50, and a packing member P is disposed at an outer side of the mounting portion 54. A recess 56 is formed for receiving.

In addition, the upper surface of the flange 52 of the reflector 50, that is, the upper inner surface of the reflector 50 is formed to have a constant inclination, and at the same time a mesh-shaped reflector is formed to form a regular pattern of inclination LED module ( It is possible to illuminate the irradiation light by 40 more efficiently.

In addition, the light transmitting protective member 70 is positioned at the mounting portion 54 of the reflector 50, and the light transmitting protective member is formed by a packing member P accommodated in the recess 56 of the reflector 50. The edge of the bottom surface of the 70 is pressed by the first pressing portion 64 of the fixing cap 60 to be described below

An upper end surface of the light transmissive protective member 70 pressurizes the packing member P accommodated in the recess 56 to maintain airtightness.

In addition, the light transmitting protective member 70 is preferably to have a more improved lighting efficiency using a glass or a diffusion lens.

Furthermore, a cable insertion hole 58 for the power cable 46 is formed at a position corresponding to the cable insertion hole 34e of the heat dissipation member 30 at the upper end of the reflector 50 so that the power cable 46 ) Can be protected,

In addition, at the upper end of the reflector 50, two projections 57 for separating the reflector 50 from the PC 42 of the LED module 40 located on the base 32 of the heat dissipation member 30 are provided. Since the reflector 50 is spaced apart from the direct contact with the LED module 40, the reflector 50 may be prevented from overheating.

1 to 8, in the LED street light according to the present invention, the fixing cap 60 is

A guide portion 62 fitted between the wall 34 of the heat dissipation member 30 and the reflector 50, the flange 52 of the reflector 50, and the wall 34 of the heat dissipation member 30. First and second pressing portions 64 and 66 formed inside and outside the guide portion 62 to press the lower flange 34d, respectively, and

And a corresponding fastening part 68 corresponding to the second fastening part 34a formed on the wall 34 of the heat dissipation member 30.

That is, the guide portion 62 is fitted between the reflector 50 arranged on the settlement portion 34b of the heat dissipation member 30 and the wall 34 of the heat dissipation member 30 to assemble the street lamp of the present invention. And to facilitate the disassembly, and above all by assembling the position of the reflector 50 after assembling the street light can be improved the lighting effect by the more stable LED module 40.

The first and second pressing portions 64 and 66 may be formed inside and outside the guide portion 62, and the first pressing portion 64 may include the flange 52 and the reflector 50. Press each of the lower flanges 34d formed on the wall 34 of the heat dissipation member 30,

The first pressing part 64 simultaneously presses the bottom surface of the light-transmissive protective member 70 arranged on the mounting portion 54 of the reflector 50.

The corresponding fastening portion 68 protrudes to correspond to the second fastening portion 34a of the heat dissipation member 30 on the outer side of the fixing cap 60, and is screwed by a coupling screw (B). Combined

The first and second pressing portions 64 and 66 respectively press the lower end of the wall 34 of the heat dissipation member 30 and the flanges 34d and 52 of the reflector 50 to fix the assembly of the street lamp. It is possible through the combination of the cap 60 only to improve the assembly of the street lamp,

At the same time, when the LED module 40 is broken or damaged, only the fixing cap 60 can be removed to quickly repair and replace the LED module 40, thereby simplifying and facilitating post-management after the installation of the street lamp. .

In addition, the first pressing portion 64 of the fixing cap 60 is formed with a recess 64a for the packing member P, and when the fixing cap 60 is coupled to the heat dissipation member 30, the packing member ( By pressing P), the bottom surface of the reflector 50 may be brought into close contact with each other to maintain airtightness.

9 is a fastening groove 42a and the fixing cap of the LED module 40 coupled to each of the first fastening portion 32a and the second fastening portion 34a of the heat dissipation member 30 according to the present invention. 60 shows another modification of the corresponding fastening portion 68 of FIG.

Corresponding fastening portions 68 of the fastening grooves 42a of the LED module 40 and the fixing cap 60 are respectively disposed on the lower ends of the first fastening portions 32a and the second fastening portions 34a of the heat dissipation member 30. Guide protrusions (32b) and (34f) having a smaller diameter is formed to specify the position of each member at the time of assembling the street lamp, thereby assembling the street lamp more quickly, thereby increasing the assemblability.

Furthermore, the coupling between the first fastening portion 32a of the heat dissipation member 30, the fastening groove 42a of the LED module 40, and the fastening groove 12a of the fixing portion 12 is illustrated in the accompanying drawings. Although not as described above, the assembly and disassembly of the street lamp can be performed more quickly and easily by allowing the coupling and disassembly to be performed at one time through a coupling means such as a coupling pin having elasticity to facilitate separation and disassembly as well as the screwing method as described above. It is also possible to implement.

In the above description with reference to the accompanying drawings, the present invention, the assembly of the improved LED street light has been described with a particular shape and direction, the present invention can be variously modified and changed by those skilled in the art, such variations and modifications are the present invention Should be construed as being included in the scope of

1 is a perspective view showing an LED street light according to the present invention,

Figure 2 is an exploded perspective view showing an LED street light according to the present invention,

3 is a cross-sectional view showing a combination of each configuration according to the present invention,

4 is a perspective view and a cross-sectional view showing a heat radiation member according to the present invention;

5 is a perspective view and a sectional view of the LED module according to the present invention;

6 is a perspective view and a sectional view showing a reflector according to the present invention;

7 is a perspective view and a sectional view showing a fixing cap according to the present invention;

8 is a perspective view showing the coupling of the heat dissipation member and the LED module according to the present invention;

Figure 9 is a perspective view showing a modification of the other combination of the heat dissipation member and the LED module according to the present invention.

<Explanation of Signs of Major Parts of Drawings>

10 top cover 12 fixed part

12a: fastening groove 14: coupling portion

16: heat dissipation fin

20: bottom cover 22: receiving portion

24: counterpart

30: heat dissipation member 32: base

32a: first fastening portion 32b: guide protrusion

34: wall 34a: second fastening portion

34b: Settlement 34c: Upper Flange

34d: Lower Flange 34c ′: First Ring Groove

34d ′: 2nd round groove 34e: Cable insertion hole

34f: guide protrusion 36: heat dissipation protrusion

36a: first heat dissipation protrusion 36b: second heat dissipation protrusion

40: LED module 42: PC

42a: fastening groove 44: LED

46 power cable

50: reflector 52: flange

54: mounting portion 56: recess

57: projection 58: cable insertion hole

60: fixed cap 62: guide portion

64: first pressing portion 64a: groove

66: second pressing portion 68: corresponding fastening portion

70: light transmitting protective member

P: Packing member B: Coupling screw

Claims (5)

A top cover having a plurality of fixing parts protruding downward; A bottom cover coupled to the top cover and having a receiving portion formed to correspond to the fixing portion; A base having a first fastening part for being fixedly coupled to each fixing part of the top cover; A wall connected to the base and having a second fastening portion and a settled portion opened downward to be arranged and fixed to each receiving portion of the bottom cover, A plurality of heat dissipation protrusions formed on the outside of the wall Heat dissipation member comprising a; LED modules including a PCB coupled to the base of the heat dissipation member, and a plurality of LEDs mounted on the PCB; Reflectors arranged in the settled portion of the heat dissipation member and spaced apart from the wall; And A guide part fitted between the wall of the heat dissipation member and the reflector; First and second pressing portions formed inside and outside the guide portion to press each of the reflector lower flange and the heat radiating member wall lower flange; It includes a fixing cap having a corresponding fastening portion corresponding to the second fastening portion formed on the wall of the heat radiating member, Cable input hole is formed in the contact surface of the base and the wall of the heat radiating member, The first ring groove for receiving the packing member is formed directly below the input hole in the wall, Inside the bottom flange of the wall is formed a second annular groove for accommodating the packing member, The guide portion of the fixed cap presses the packing member located in the first annular groove, The second pressing portion is assembled LED street light improved assembly, characterized in that for pressing the packing member located in the second annular groove. delete The method of claim 1, The reflector has an LED street light improved assembly characterized in that it has a projection for spaced apart from the PCB of the LED module located on the base of the heat dissipation member. The method according to claim 1 or 3, The reflector has a mounting portion formed on the inner side of the flange, and a recess formed outside the mounting portion for receiving the packing member, Further comprising a light transmitting protective member positioned on the reflector mounting portion, LED assembly of claim 1, wherein the first pressing portion of the fixing cap has a recess for accommodating the packing member. The method according to claim 1 or 3, The top cover and the bottom cover is made of an aluminum material for heat dissipation, LED street light, characterized in that the heat dissipation fin is formed on the outside of the top cover.

Images