WO2011090231A1

WO2011090231A1 - Heat sink for a lighting device

Info

Publication number: WO2011090231A1
Application number: PCT/KR2010/000485
Authority: WO
Inventors: 권병일
Original assignee: Kwon Byeng-Il
Priority date: 2010-01-19
Filing date: 2010-01-27
Publication date: 2011-07-28
Also published as: KR101047757B1

Abstract

The present invention relates to a heat sink for a lighting device, including a plurality of heat sink units, a first fixing plate, a second fixing plate, and a coupling member. The heat sink units are plate-shaped, and are sequentially arrayed in the thickness direction of each heat sink unit to collectively form a barrel shape having a hollow interior. Both sides of each heat sink unit, corresponding to the upper and lower ends of the barrel shape, are provided with a first coupling part and a second coupling part, respectively. The first and second coupling parts either a recess or a protrusion. The first fixing plate includes a third coupling part coupled to each first coupling part, and is coupled to the upper end of the barrel shape. The second fixing plate includes a fourth coupling part coupled to the second coupling part, and is coupled to the lower end of the barrel shape. The coupling member fastens the first and second fixing plates together, the shape of the hollow interior being maintained such that the heat sink units reliably maintain the barrel shape. Accordingly, the assembly and disassembly of the heat sink is facilitated, the barrel shape is reliably maintained without reinforcements, and cool air efficiently circulates to maximize heat dissipation efficiency.

Description

Heat Sinks for Luminescent Lighting

The present invention relates to a heat sink for a light emitting lamp, and more particularly, to a heat sink for a light emitting lamp that can firmly fix the shape of the heat sink and maximize heat dissipation efficiency while improving the assembly and disassembly of the heat sink.

In general, heat sinks are mounted on heat-generating parts installed in electric and electronic products to release heat generated from heat-generating parts to the outside to prevent damage or malfunction of the product by working with heat generated inside the product. Device.

Heat sinks have been used in various fields, and recently, their use has been extended to LED lightings, which are being spotlighted as next generation lightings as well as economic advantages such as long life and low power driving.

1 is an exploded perspective view of a heat sink assembly 100 for lighting using a conventional LED. Referring to the drawings, a plurality of plate-shaped heat sink unit 110 is laminated in the thickness direction to form a generally cylindrical shape, the center fixing portion for supporting each heat sink unit 110 in a cylindrical shape in the inner cavity of the cylinder 111 is provided.

The method of stacking a plurality of plate-shaped heat sink units 110 has been conventionally performed by hand, but the applicant has developed a method of forming the heat sink units 110 and simultaneously stacking them and registered a patent (No. 932855). I've done it.

Meanwhile, when fixing the laminated heat sink unit 110 in a cylindrical shape, as shown in FIG. 1, a silicone adhesive is applied to the outside of the central fixing part 111 to fix the adhesive. The heat sink assembly 100 was assembled by fixing the

fixing plates

115 and 117 and mounting the circuit board 150 on which the LED element 160 is mounted on the upper fixing plate 115.

However, in the conventional heat sink assembly 100, since each heat sink unit 110 is fixed to the central fixing part 111 through a silicone adhesive, it is not easy to maintain the cylindrical shape firmly. Therefore, for this purpose, since the reinforcing ring 140 as shown in FIG.

In addition, even if a thermally conductive or electrically conductive adhesive is used, since heat generated in the LED element 160 is transferred to each heat sink unit 110 through the adhesive 112, when adhesion is poor, the heat dissipation performance is deteriorated and the heat sink is reduced. There was a problem that can not properly perform the function itself.

In addition, the heat sink assembly 100 as described above has a problem in that it is not possible to perform uniform plating as a whole because of low reliability of thermal conductivity and electrical conductivity. Therefore, in order to perform the plating operation, before the assembly of the heat sink is completed, the heat sink unit 110 is fixed by using a fixture for plating separately, and after performing the plating operation, first release the fixture again and then assembling work. Had to do. Therefore, there is a problem that the plating and assembly process is complicated.

In addition, after assembling the heat sink through the adhesive is not easy to disassemble, there is a problem that the entire assembly should be discarded even when the heat sink unit 110 needs to be partially replaced.

On the other hand, the heat sink assembly 100 described above has a problem that the circulation of the cooling air for heat exchange is not easy because the internal cavity is filled by the central fixing portion 111. That is, for effective heat dissipation, the heat transferred to each heat sink unit 110 should exchange heat with the cooling air. For this purpose, the cooling air should be well circulated to the center portion of the heat sink assembly 100. However, since the center of the heat sink assembly 100 is filled by the central fixing part 111, since the cooling air blown from the outside does not pass through the cylinder, heat exchange is not easy, and thus heat dissipation efficiency is deteriorated.

Accordingly, the present invention provides a heat sink for a light emitting lamp that is easy to assemble and disassemble the heat sink while maintaining the reliability of electrical conductivity and thermal conductivity by directly contacting the heat source and each heat sink unit.

In addition, another object of the present invention is to provide a heat sink for a light emitting lamp that can maintain the cylindrical shape without a separate reinforcing member.

In addition, another object of the present invention is to provide a heat sink for a light emitting lighting sphere that can be circulated in the cooling air is effectively made because the cylindrical inner cavity is maintained.

According to one embodiment of the present invention, a plurality of heat sink units having a plate shape and sequentially stacked in the thickness direction to form a tubular shape having a cavity inside as a whole correspond to upper and lower ends of the cylindrical shape. A first coupling part and a second coupling part formed on either side of each of the heat sink units, each of which includes a groove or a protrusion; A first fixing plate having a third coupling part coupled to each of the first coupling parts, and coupled to the tubular upper end part; A second fixing plate having a fourth coupling part coupled to the second coupling part and coupled to the tubular lower end; By fastening and fixing the first fixing plate and the second fixing plate to each other while the cavity is maintained, the heat sink unit is achieved by a heat sink for a light-emitting lighting device including a; fastening member to maintain the tubular shape.

Here, the heat sink unit includes a central portion located inside the tubular shape, and a heat dissipation wing extending from the central portion in the tubular outward direction and extending from the central portion, wherein the first coupling portion includes the central portion. On the upper side, the second coupling portion may be formed on the lower side of the central portion, respectively.

When the plurality of heat sink units are stacked in a cylindrical shape, the first coupling portion and the second coupling portion are formed in a groove shape at the same position of each heat sink unit to form a circular groove as a whole, and the third coupling portion and the third coupling portion Four coupling portions may be provided in a ring shape correspondingly.

The first coupling portion and the second coupling portion may be provided in any one of a quadrangular, triangular or circular shape, and the third coupling portion and the fourth coupling portion may be provided in a shape corresponding thereto.

The fastening member may be provided with a fastening screw, and a fastening hole may be provided at the center of the first fixing plate and the second fixing plate.

The fastening member is integrally provided with any one of the first fixing plate or the second fixing plate and extends toward the other, and the other of the first fixing plate or the second fixing plate is provided with a coupling hole to which the end of the fastening member is coupled. Can be.

At least one of an upper side or a lower side of the central portion may be formed with a bent portion extending from the central portion to the neighboring central portion so that each central portion may be in surface contact with the first fixing plate or the second fixing plate.

A plurality of heat dissipation holes may be formed in at least one of the first fixing plate, the second fixing plate, or the heat sink unit.

At least one of the first fixing plate or the second fixing plate is formed with a protrusion corresponding to the shape of the cavity, and at least one of the upper portion or the lower portion of the central portion is formed with a protrusion receiving groove corresponding to the protrusion, wherein each fixing plate is When combined, each heat sink unit may maintain a cylindrical shape.

The fastening member may be provided with a rod-shaped connecting portion provided between the first fixing plate and the second fixing plate, and a fastening screw which is fastened to both ends of the connecting portion through the fixing plates.

1 is an exploded perspective view of a heat sink for a conventional light emitting fixture;

2 is an exploded perspective view of a heat sink for a light emitting fixture according to an embodiment of the present invention;

3 is a cross-sectional view of a heat sink for a light emitting fixture according to an embodiment of the present invention;

4 is a cross-sectional view of a heat sink for a light emitting fixture according to another embodiment of the present invention;

5 to 7 are cross-sectional views showing various embodiments of the first coupling portion according to the present invention;

8 to 10 are cross-sectional views of a fastening member according to various embodiments of the present disclosure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 2, a heat sink 1 for a light emitting fixture according to an embodiment of the present invention includes a heat sink unit 10, a first fixing plate 31, a second fixing plate 33, and a fastening member ( 50).

The heat sink unit 10 has a plate shape and is sequentially stacked in the thickness direction to form a cylindrical shape having a cavity 2 as a whole. Here, the cylindrical shape may be a circular cylinder as shown in Figure 2, or may be a polygonal cylinder shape such as a square cylinder. Hereinafter, for convenience, a circular cylindrical shape will be described as an example.

On the other hand, a method of stacking each heat sink unit in a cylindrical shape may be used in various ways, for example, the method disclosed in Korean Patent Registration No. 932855 previously filed and registered by the applicant of the present application may be used.

As shown in FIGS. 2 and 3, the heat sink unit 10 includes a central portion 11 positioned inside the tubular shape and a heat dissipation area extending from the central portion 11 in the tubular outward direction. It includes a heat dissipation wing (13).

The first coupling part 41 and the second coupling part 42 provided with any one of grooves or protrusions are formed on both sides of each heat sink unit 10 corresponding to both upper and lower ends of the cylindrical shape.

The first coupling portion 41 and the second coupling portion 42 are respectively formed in the third coupling portion 43 and the fourth coupling portion 44 formed on the first fixing plate 31 and the second fixing plate 33 described later. By being combined, each heat sink unit 10 can be firmly maintained in a cylindrical shape without a separate reinforcing member.

The first coupling part 41 and the second coupling part 42 may be provided in any one of a groove or a protrusion, for example, as shown in FIG. 3, and may be provided in a groove shape. As shown in Figure 4, it may be provided in a projection shape.

In addition, the first coupling part 41 may be provided in a groove shape, and the second coupling part 42 may be provided in a different shape such as a protrusion shape. Further, the shape of the first coupling portion 41 formed in each heat sink unit 10 may be different. Of course, in each case, the shapes of the third coupling part 43 and the fourth coupling part 44 are provided in a shape corresponding to the corresponding shape.

Meanwhile, specific shapes of the first coupling part 41 and the second coupling part 42 are also variously provided, such as a quadrangle 41a, a triangle 41b, a circle 41c, and the like. Of course it can be.

That is, the first coupling part 41 and the third coupling part 43, and the second coupling part 42 and the fourth coupling part 44 are coupled to each other so that the first fixing plate 31 and the second fixing plate ( 33), as long as the heat sink units 10 can firmly fix the cylindrical shape, there is no particular limitation on the shape of each coupling portion.

Referring to FIG. 3, the first coupling portion 41 is formed above the central portion 11, and the second coupling portion 42 is formed below the central portion 11.

When the heat sink unit 10 is stacked in a cylindrical shape, the first coupling part 41 and the second coupling part 42 are formed in a groove shape at the same position of each heat sink unit body 10 to form a circular groove as a whole. In addition, the third coupling portion 43 and the fourth coupling portion 44 may be provided in a ring shape correspondingly.

As described above, when the first coupling portion 41 and the second coupling portion 42 are formed at the same position of each heat sink unit 10, the heat sink unit 10 has the same shape, so that the production As well as this, as shown in Figure 2, after forming a cylindrical shape, since the first coupling portion 41 or the second coupling portion 42 has a certain shape such as a circle, the third coupling portion 43 And since the fourth coupling portion 44 is made to have a ring shape corresponding to this, there is an advantage that the assembly is easy.

On the other hand, at least one of the upper side or the lower side of each central portion 11 may be formed bent portion 12a extending from the central portion 11 to the adjacent central portion (11). The bent portion 12a is in surface contact with the first fixing plate 31 or the second fixing plate 33 to effectively transfer heat.

The first fixing plate 31 has a third coupling portion 43 coupled to the first coupling portion 41 and is coupled to the cylindrical upper end portion. The circuit board 150 on which the LED device 160 is mounted is mounted on the first fixing plate 31.

The second fixing plate 33 has a fourth coupling portion 44 coupled to the second coupling portion 42 and is coupled to the lower end of the cylindrical shape.

Meanwhile, at least one of the first fixing plate 31 or the second fixing plate 33 is formed with a protrusion 45 corresponding to the shape of the cavity 2 as shown in FIG. At least one of the upper and lower portions may include a protrusion receiving groove 12b corresponding to the protrusion 45. As a result, when the first fixing plate 31 and the second fixing plate 33 are coupled to the upper and lower portions of the cylindrical shape, it is easy to align each heat sink unit 10 in a cylindrical shape, and the first fixing plate 31 And after the second fixing plate 33 is fixed, it is possible to firmly maintain the tubular shape with the engaging portions (41, 42, 43, 44).

Meanwhile, a plurality of heat dissipation holes 4 may be formed in at least one of the first fixing plate 31, the second fixing plate 33, or the heat sink unit 10. As a result, the heat dissipation area is maximized, as well as the cooling air is easily circulated into and out of the heat sink 1, so that heat exchange is active and the heat dissipation effect is improved.

The fastening member 50 fastens and fixes the first fixing plate 31 and the second fixing plate 33 to each other while the cavity 2 is maintained so that each heat sink unit 10 maintains a cylindrical shape.

That is, after the first fixing plate 31 and the second fixing plate 33 are tightly fastened by the fastening member 50, as shown in FIG. 3, each heat sink unit 10 moves in the cylindrical axis direction. Is limited by the respective fixing plates 31 and 35, the movement in the radial direction is limited by the engaging

portions

41, 42, 43 and 44, and the movement in the circumferential direction is limited by the bent portion 12a. Therefore, the cylindrical shape can be maintained firmly.

Fastening member 50 may be provided in various ways, for example, as shown in Figure 3, may be provided with a fastening screw 51, in this case, the first fixing plate 31 and the second fixing plate ( A fastening hole 52 may be provided at the center of 33.

Alternatively, as shown in FIG. 8, the fastening member 50 may be provided integrally with one of the first fixing plate 31 or the second fixing plate 33 to extend toward the other. In this case, the other of the first fixing plate 31 or the second fixing plate 33 is provided with a coupling hole 53 to which the end of the fastening member 50 'is coupled, the first fixing plate 31 and the second fixing plate When fastening and fixing the 33 to each other, the fastening member 50 ′ can be fastened by rotating either one of the first fixing plate 31 or the second fixing plate 33 in a state where the fastening member 50 ′ is inserted into the fastening hole 52.

Alternatively, as shown in FIG. 9, the center of one of the first fixing plate 31 or the second fixing plate 33 may be extended through the other, and then may be fastened using the fastening member 50.

Alternatively, as shown in FIG. 10, a rod-shaped connecting portion 55 is provided between the first fixing plate 31 and the second fixing plate 33, and the fastening screw 51 passes through each of the fixing

plates

31 and 33. It can also be fastened to both ends of the connecting portion (55).

The above-described fastening method is only one embodiment, and in addition, various methods such as rivets may be used without limitation.

Here, when fastening the first fixing plate 31 and the second fixing plate 33 to each other, the cavity 2 inside the cylinder is maintained without being filled by the fastening member 50. That is, as shown in Figs. 3, 4, and 8 to 10, the fastening member 50 occupies only a part of the cavity 2 and most of the cavity 2 is maintained as it is. Accordingly, the cooling air introduced from one side of the cylinder can pass straight through the cavity 2 of the cylinder in the other direction.

Therefore, since the circulation of the cooling air is made more effectively, the heat radiation efficiency can be maximized.

Next, the assembling process of the heat sink 1 for the light emitting lamp having the above-described structure will be described. First, after manufacturing each heat sink unit 10, each heat sink unit 10 is laminated | stacked in the thickness direction, and is comprised in cylindrical shape. At this time, the lamination method may be manually connected to each of the heat sink unit 10, the method disclosed in the aforementioned patent registration No. 932855 may be used.

Next, as shown in FIG. 3, the first fixing plate 31 and the second fixing plate 33 are mounted to each other at upper and lower ends of the tubular body. At this time, the protrusion 45 is seated in the protrusion receiving groove 12b and aligned in a perfect cylindrical shape, and at the same time, the first coupling portion 41 and the third coupling portion 43 are formed, and the second coupling portion 42 is provided. And the fourth coupling part 44 are coupled. In this case, an electrical and thermally conductive adhesive may be further applied between the upper portion of the central portion 11 and the first fixing plate 31 or between the lower portion of the central portion 11 and the second fixing plate 33.

Alternatively, as shown in FIG. 4, the protrusion 45 and the protrusion receiving groove 12b may not be formed.

Finally, by fastening and fixing the first fixing plate 31 and the second fixing plate 33 using the fastening member 50, the tubular shape is maintained firmly.

As described above, according to the heat sink for the light emitting fixture, the first and second fixing plates may be fastened and fastened with a fastening member to the tubular heat sink unit configuration, thereby facilitating assembly and disassembly of the heat sink.

In addition, by combining the heat sink unit 10 and each fixing plate (31, 33) through the coupling portion and the protrusion portion it is possible to maintain the tubular shape without a separate reinforcing member.

In addition, since the tubular inner cavity is assembled while being maintained, the circulation of the cooling air is effectively achieved to maximize the heat dissipation effect.

According to the heat sink for light emitting fixture described above, the first and second fixing plates may be fastened and fastened by fastening members to the cylindrical heat sink unit configuration, thereby facilitating assembly and disassembly of the heat sink.

In addition, by combining the heat sink unit and each fixing plate through the coupling portion and the protrusion, it is possible to firmly maintain the tubular shape without a separate reinforcing member.

Claims

A plurality of heat sink units having a plate shape and sequentially stacked in the thickness direction to form a tubular shape having a cavity therein as a whole. One of grooves or protrusions may be provided on both sides of each heat sink unit corresponding to both upper and lower ends of the cylindrical shape. A first coupling portion and a second coupling portion are formed, respectively;

A first fixing plate having a third coupling part coupled to each of the first coupling parts, and coupled to the tubular upper end part;

A second fixing plate having a fourth coupling part coupled to the second coupling part and coupled to the tubular lower end;

And a fastening member for fastening and fixing the first fixing plate and the second fixing plate to each other while maintaining the cavity, such that each of the heat sink units maintains a tubular shape.
The method of claim 1,

The heat sink unit includes a central portion located inside the tubular shape, and a heat dissipation wing extending from the central portion in the tubular outward direction and extending from the central portion, wherein the first coupling part is located above the central portion. And the second coupling part is formed under the central part, respectively.
The method of claim 2,

When the plurality of heat sink units are stacked in a cylindrical shape, the first coupling portion and the second coupling portion are formed in a groove shape at the same position of each heat sink unit to form a circular groove as a whole, and the third coupling portion and the third coupling portion The four coupling portion corresponding to the heat sink for the light emitting lamp, characterized in that provided in a ring shape.
The method of claim 1,

The shape of the first coupling portion and the second coupling portion is provided in any one of a square, triangular or circular, the third coupling portion and the fourth coupling portion heat sink for the light emitting lamp, characterized in that provided in the corresponding shape.
The method of claim 1,

The fastening member is provided with a fastening screw, the heat sink for the light emitting lamp, characterized in that a fastening hole is provided in the center of the first fixing plate and the second fixing plate.
The method of claim 1,

The fastening member is integrally provided with one of the first fixing plate or the second fixing plate and extends toward the other, and the other of the first fixing plate or the second fixing plate is provided with a coupling hole to which the end of the fastening member is coupled. Heat sink for light emitting fixtures, characterized in that.
The method of claim 2,

Wherein at least one of an upper side and a lower side of the central portion is formed to have a bent portion extending from the central portion to the neighboring central portion such that each central portion is in surface contact with the first fixing plate or the second fixing plate. Old heatsink.
The method of claim 1,

At least one of the first fixing plate, the second fixing plate or the heat sink unit is a heat sink for a light emitting lamp, characterized in that a plurality of heat radiation holes are formed.
The method of claim 2,

At least one of the first fixing plate or the second fixing plate is formed with a protrusion corresponding to the shape of the cavity portion, and at least one of the upper portion or the lower portion of the central portion is formed with a protrusion receiving groove corresponding to the protrusion portion, wherein each fixing plate is The heat sink for a light emitting lamp, characterized in that each heat sink unit to maintain a cylindrical shape when combined.
The method of claim 1,

The fastening member is a heat sink for a light emitting lamp, characterized in that the rod-shaped connecting portion provided between the first fixing plate and the second fixing plate, and fastening screws which are fastened to both ends of the connecting portion through the fixing plates.