KR102329728B1 - Heat radiating apparatus for electrical element and fastening instrument for the same - Google Patents

Abstract

The present invention relates to a heat dissipation device for an electronic device and a coupling device used therein. In the present invention, the coupler 10 is made by cutting and bending a single sheet of metal. A first fastening piece 12 and a second fastening piece 12 ′ are provided at both ends of the main body 11 of the coupling part 10 . At the ends of the first and second fastening pieces 12 and 12 ′, there is a locking jaw 16 that is hooked to the inclined jaw 50 of the heat sink 40 . At the front end of the middle part of the main body 10 , there is an element pressing plate 30 that is in close contact with the surface of the electric element 52 to bring the electric element 52 into close contact with the adhesion surface 46 of the heat sink 40 . The element pressing plate 30 is integrally formed with the main body 11 to adhere the electric element 52 to the heat sink 40 by elastic force. Sidewalls 48 are formed on both sides of the contact surface 46 at predetermined intervals on the heat sink 40, and on the opposite surfaces of the sidewalls 48, inclined jaws are continuously formed along the inclined surfaces. is formed so that the locking jaw 16 is hung. According to the present invention as described above, the electric elements 52 of various sizes can be mounted on the heat sink 40 to be rigidly and to minimize the space occupied.

Description

Heat radiating apparatus for electrical element and its coupling device {Heat radiating apparatus for electrical element and fastening instrument for the same}

The present invention relates to a heat dissipating device for an electrical device and a coupling tool used therein, and more particularly, to a heat dissipating device for an electrical device that allows the heat generated in the electrical device to be more smoothly discharged to the outside through a heat sink. And it relates to a coupling tool used therein.

Electrical devices generate a lot of heat during operation. If the heat generated from the electric element is not rapidly discharged to the outside, it adversely affects the operation of the electric element, and in severe cases, the electric element is damaged by heat.

In general, an electric device is often used by being mounted on a printed circuit board, and a heat sink is installed in the electric device to dissipate heat generated from the electric device to the outside. To this end, the heat sink is made of a material with good thermal conductivity, and a metal material is generally used.

To ensure good heat conduction between the electrical element and the heatsink, there should be no gaps between them. This is because, if air is placed in this gap, heat is not conducted properly and heat cannot be properly dissipated from the electric device to the heat sink.

Because of this problem, many studies have been made to make the electrical device and the heat sink closely contact with each other. In some cases, screws are used to attach an electric element to a heat sink. That is, the electric element is fastened to the heat sink with screws. However, in this case, there is a problem that a tool is necessarily required, and the operation of fastening the screw takes a relatively long time.

In order to bond the electric element and the heat sink in close contact with each other, a clip made by bending the wire to a predetermined shape is sometimes used. A clip should be coupled to the opposite side of the side to which the device is to be adhered and fixed. Therefore, the clip made of wire must pass through the upper end of the heat sink. Due to the nature of the structure, the clip made of wire is higher than the heat sink, so there is a problem in that a lot of space is required for installation as a whole.

Japanese Patent Laid-Open No. 1996-139239

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the related art as described above, while being mounted on a heat sink in a one-touch type, and to make an electrical element, which is a heat source, and the heat sink in close contact with the heat sink.

Another object of the present invention is to position the electric element and the coupling hole in the area of one side of the heat sink.

According to a feature of the present invention for achieving the above object, the present invention provides a main body and a first and second fastening pieces that are bent and extended at both ends of the main body and have a clasp at the tip and are fastened to a heat sink. and an element pressing plate extending in the extension direction of the first and second fastening pieces from the front end of the middle part of the main body and capable of a predetermined elastic deformation so that the adhesion part adheres the electric element to the heat sink with elastic force, The main body, the first and second fastening pieces, and the element pressing plate are made of a single sheet of metal, and a front end of the first and second fastening pieces is further provided with a contact piece that is in close contact with the side surface of the electric element, and the contact piece is the engaging piece. An inclined portion extending from the chin and formed to be inclined in a direction in which those of the first fastening piece and the second fastening piece approach each other, a side contact portion extending from the inclined portion and closely contacting the side surface of the electric element, and the tip of the side attachment portion It extends and the first fastening piece and the second fastening piece are formed to be inclined in a direction to approach each other, and may include an insertion guide for avoiding interference with the heat sink side.

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The element pressing plate includes an inclined connection part extending obliquely from the main body, a contact part extending from the inclined connection part to be in close contact with the element body, and a guide inclined part inclined in the opposite direction to the inclination of the inclined connection part at the tip of the contact part.

According to another feature of the present invention, in the heat dissipating device for an electric device for receiving and discharging heat generated from the electrical device, a contact surface to which the electrical device is closely adhered is provided on one side and heat exchange with the atmosphere is provided on the other side A heat sink is disposed on the sidewalls formed on both sides of the close contact surface for the heat sink, and an inclined jaw is formed along an inclined surface at a position facing each other; 2 fastening pieces are provided side by side at both ends of the main body, the element pressing plate is extended from the main body, and the contact portion is in close contact with the surface of the electric element by an elastic force, and may include a coupler for attaching the electric element to the contact surface. At the ends of the first and second fastening pieces, a close contact piece is further provided to be in close contact with the side surface of the electric element, the contact piece extending from the locking protrusion and inclined in a direction in which the first fastening piece and the second fastening piece approach each other. a side contact portion extending from the inclined portion and being in close contact with the side surface of the electric element, and extending from the tip of the side contact portion, the first fastening piece and the second fastening piece are formed to be inclined in a direction closer to each other, so that the heat It may include an insertion guide for avoiding interference with the sink side.

The main body of the coupler, the first and second fastening pieces, and the element pressing plate are made of a single metal plate.

The first and second fastening pieces include a connecting portion bent and extended from the main body and the engaging protrusion provided at the front end of the connecting portion.

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The element pressing plate includes an inclined connecting portion extending obliquely from the main body, the contacting portion extending from the inclined connecting portion to be in close contact with the electric device, and a guide inclined portion inclined in the opposite direction to the inclination of the inclined connecting portion at the tip of the contacting portion.

The following effects can be obtained in the heat dissipation device for an electric device and its coupling unit according to the present invention.

The coupler of the present invention is arranged only in the area of one side of the heat sink in mounting the electric element to the heat sink. Accordingly, it is possible to reduce the size of the heat dissipating device of the electrical device, thereby reducing the size of the product in which the electrical device is used.

In the present invention, the coupler is made by cutting and bending a metal plate, and there are a first fastening piece and a second fastening piece that are coupled to a heat sink, and an element pressing plate and a close contact piece that are in close contact with an electric element. Since the electric element is fixed in close contact with the heat sink, the electric element can be combined in close contact with the heat sink, thereby making it easier to combine the heat sink and the electric element.

In the present invention, there is a contact plate at the front end of the first fastening piece and the second fastening piece of the coupler, respectively, so that the fastening pieces are coupled to the heat sink and the contact plates are in close contact with both sides of the electric element, so that the electric element can be more firmly fixed There is an effect that exists.

1 is a perspective view showing a preferred embodiment of a heat dissipation device for an electric device according to the present invention.
Figure 2 is an exploded perspective view showing the configuration of the embodiment shown in Figure 1;
Figure 3 is a perspective view showing a coupler of the embodiment of the present invention.
Figure 4 is a rear view showing the coupler shown in Figure 3;
5 is a cross-sectional view showing the configuration of an important part of the embodiment of the present invention.
Figure 6 is a cross-sectional perspective view showing a state in which the electric device is mounted to the heat sink by a coupler in the embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

As shown in the drawings, the heat dissipation device of the present invention combines a heat sink 40 that receives heat from an electric element 52 and transfers it to the atmosphere, and the electric element 52 and the heat sink 40 with each other. It has a coupler (10).

Here, the coupler 10 is formed in the shape shown in the drawings by bending the metal plate after cutting it into a predetermined shape. A metal is used as a material of the coupler 10, and to be precise, stainless steel is used.

The coupler 10 has a body 11 . The main body 11 has a rectangular plate shape in this embodiment. At both ends of the body 11, there are a first fastening piece 12 and a second fastening piece 12'. The first fastening piece 12 and the second fastening piece 12 ′ are parts fastened to the heat sink 40 . The first and second fastening pieces 12 and 12 ′ are connected to the main body 11 and extend at both ends of the main body 11 at a predetermined angle with respect to the main body 11 . All parts of the body 11 and the first and second fastening pieces 12 and 12' are flat when viewed from the rear surface. That is, the main body 11 and the first and second fastening pieces 12 are flat. . This is to ensure that the coupler 10 is stably in close contact with the heat sink 40 .

The first and second fastening pieces 12 and 12 ′ have a connection portion 14 . The connecting portion 14 is a portion extending from the main body 11 . The connecting portions 14 on both sides extend side by side or toward the front end so as to be closer to each other.

The front end of the connection part 14 has a locking protrusion 16 . The locking jaw 16 is a portion hooked on the inclined jaw 50 of the heat sink 40 . Each of the locking jaws 16 protrude so that both sides thereof face opposite directions.

The first fastening piece 12 and the second fastening piece 12' have a close contact piece 20 at their ends. The close contact piece 20 is a portion in close contact with both sides of the electric element 52 . The close contact piece 20 is in close contact with the side surface of the electric element 52 so that both sides of the front end of the fastening piece 12, 12' come close to each other. To this end, the contact piece 20 has an inclined portion 22 . The inclined portion 22 extends obliquely in a direction in which the fastening pieces 12 and 12' on both sides approach each other.

The front end of the inclined portion 22 has a side contact portion 24 . The side contact portion 24 is a portion that is actually in close contact with the surface of the electric element 52 . The side contact portions 24 on both sides extend side by side. Of course, the side contact portions 24 on both sides may become closer toward the tip. An insertion guide 26 is provided at the tip of the close contact piece 20 . The insertion guide portion 26 does not interfere with the inclined jaw 50 of the heat sink 40 when the first and second fastening pieces 12 and 12 ′ move for coupling with the heat sink 40 . to be guided. The insertion guide portion 26 is inclined so that the ones on both sides become closer to each other toward the tip.

There is an element pressing plate 30 extending from the front end of the middle part of the main body 11 . The element pressing plate 30 is to press the element 52 to be in close contact with the contact surface 46 of the heat sink 40 . The element pressing plate 30 presses the element 52 by its own elastic force. The element pressing plate 30 has an inclined connection part 32 . The inclined connection part 32 is connected to the main body 11 and extends a predetermined length to be inclined in the rear end direction of the main body 11 so that elasticity can be exerted.

At the tip of the inclined connection part 32, there is a contact part 34 having a predetermined area. The contact portion 34 is a portion that is actually in close contact with the surface of the element 52 , and may face the surface of the heat sink 40 when installed on the heat sink 40 .

The tip of the contact part 34 has a guide inclined part 36 . The guide inclined part 36 is a part for avoiding interference with the electric element 52 . The guide inclined portion 36 has an inclination opposite to that of the inclined connecting portion 32 .

The heat sink 40 is made of a metal material having good thermal conductivity. An example is aluminum. The sink body 42 forms the skeleton of the heat sink 40 . A plurality of heat dissipation fins 44 are provided on the outer surface of the sink body 42 . The heat dissipation fins 44 are in the form of a plate in this embodiment, and a plurality of them are arranged side by side. The heat dissipation fins 44 are arranged to maximize the contact area with the atmosphere.

The side of the sink body 42 on which the heat dissipation fins 44 are not located is the contact surface 46 . The electric element 52 is installed in close contact with the contact surface 46 . There are side walls 48 on both sides of the contact surface 46 . The sidewalls 48 are spaced apart from each other by a predetermined distance, and the electric element 52 is positioned between the sidewalls 48 .

On the inner surface of the side wall 48, inclined jaws 50 are formed so that the side walls 48 on both sides face each other. A plurality of the inclined jaws 50 are formed on one side wall 48 . In this embodiment, three inclined jaws 50 are formed on the inclined surface of one side wall 48 . The reason why the plurality of inclined jaws 50 are provided on one side wall 48 as described above is to allow one heat sink 40 to be applied to electric elements 52 having different dimensions.

Meanwhile, the electric device 52 may be an IGBT as an example. The device body 54 forms the skeleton of the electric device 52 . The element body 54 has a substantially flat hexahedral shape. Of course, the element body 54 is not necessarily a flat hexahedron. However, at least one side of the outer surface has a flat surface so that it can be in close contact with the contact surface 46 of the heat sink 40 . A heat sink 55 is provided on one surface of the device body 54 . The heat sink 55 is made of a metal material and is in close contact with the contact surface 46 of the heat sink 40 . The heat sink 55 is not necessarily required. However, if the heat sink 55 is placed on the outer surface of the element body 54 and is physically connected to the heat source inside the element body 54 , the generated heat can be better discharged to the outside.

A plurality of device legs 56 protrude from the outside of the device body 54 . The element leg 56 allows the electric element 52 to electrically connect to the outside. The element leg 56 is generally inserted into a through hole of a printed circuit board and soldered.

Hereinafter, it will be described in detail that the heat dissipation device for an electric device according to the present invention having the configuration as described above and a coupling tool thereof are used.

In the present invention, the heat sink 40 may be coupled to the electric device 52 using the coupling hole 10 . The coupling of the heat sink 40 to the electric element 52 may be performed at any time before or after the electric element 52 is mounted on the printed circuit board.

That is, the plane of one side of the device body 54, here, the heat sink 55, is positioned on the contact surface 46 of the heat sink 40, and between the sidewalls 48 and the device body 54 on both sides. The first fastening piece 12 and the second fastening piece 12' of the coupler 10 are inserted.

The locking jaws 16 at the front ends of the first fastening piece 12 and the second fastening piece 12' are caught by the inclined jaws 50 of the heat sink 40, and the electric element 52 It is determined on which sloping sill 50 the engaging sill 16 will be hung according to the size of the .

In addition, when the first fastening piece 12 and the second fastening piece 12 ′ have the close contact piece 20 , the insertion guide 26 at the tip of the close contact piece 20 is connected to the inclined jaw 50 . You will progress while being guided. In a state in which the locking jaw 16 is hooked on the inclined jaw 50 , the side contact portion 24 of the contact piece 20 is in close contact with the side surface of the device body 54 .

When the first fastening piece 12 and the second fastening piece 12 ′ travel over the inclined jaw 50 , the side contact portion 24 of the close contact piece 20 is the element body 54 . It proceeds until it adheres to the side of the As the side attachment part 24 is in close contact with the side surface of the device body 54, the inclined part 22 is elastically deformed and then restored so that the side attachment part 24 is in close contact with the device body 54 by the elastic force. do.

On the other hand, in the element pressing plate 30 extending from the front end of the middle part of the main body 11, the guide inclined part 36 is guided through the outer surface of the element body 54, and the contact part 34 is the It is seated on the surface of the element body 54 to bring the element body 54 into close contact with the contact surface 46 by the elastic force provided by the inclined connection part 32 .

The adhesion of the adhesion piece 20 to the side surface of the element body 54 and the adhesion of the adhesion portion 34 to the surface of the element body 54 are made at almost the same time. To this end, as can be seen in FIG. 4 , the side adhesion portion 24 of the adhesion piece 20 is within the area of the adhesion portion 34 of the element pressing plate 30 .

In this way, the heat sink 40 and the element body 54 are in close contact with each other, and heat transfer is made smoothly between them, and the heat generated from the element body 54 is transferred to the heat sink 40 . It is transmitted to the atmosphere through the heat dissipation fin 44 and the like.

Meanwhile, in the present invention, in the coupler 10 , the locking jaw 16 is coupled to any one of the inclined jaws 50 according to the size of the electric element 52 . For example, if the width of the device body 54 is large, the locking jaw 16 is hung on the inclined jaw 50 at the relatively upper part.

In addition, even when the upper and lower lengths of the device body 54 are long, the hanging jaw 16 may be hung on the inclined jaw 50 at the relatively upper portion. Of course, even if the upper and lower lengths of the element body 54 are long, there is enough space until the upper end of the element body 54 touches the main body 11 .

In the above, even though it has been described that all components constituting the embodiment of the present invention operate as one combined or combined, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated, excluding other components. Rather, it should be construed as being able to further include other components. All terms including technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Commonly used terms such as terms defined in the dictionary should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

For reference, the contact piece 20 is not necessarily required. If the element pressing plate 30 alone can sufficiently couple the electric element 52 and the heat sink 40 , it is not necessary to use the contact piece 20 .

10: coupling port 11: main body
12: first fastening piece 12': second fastening piece
14: connection part 16: locking jaw
20: adhesion piece 22: inclined part
24: side adhesion part 26: insertion guide part
30: element pressing plate 32: inclined connection part
34: adhesion part 36: guide inclined part
40: heat sink 42: sink body
44: heat dissipation fin 46: contact surface
48: side wall 50: sloping jaw
52: electric element 54: element body
55: heat sink 56: element leg

Claims (8)

body and
First and second fastening pieces which are bent from both ends of the main body to extend and have a locking jaw at the front end and are fastened to the heat sink;
It extends in the extending direction of the first and second fastening pieces from the front end of the middle part of the main body and includes an element pressing plate that allows a predetermined elastic deformation, so that the adhesion part adheres the electric element to the heat sink with elastic force,
The main body, the first and second fastening pieces and the element pressing plate are made of a single metal plate,
A close contact piece is further provided at the front end of the first and second fastening pieces to be in close contact with the side surface of the electric element, the close contact piece extending from the clasp and in a direction in which the first fastening piece and the second fastening piece come closer to each other An inclined portion formed to be inclined, a side contact portion extending from the inclined portion and closely contacting the side surface of the electric device, and a side contact portion extending from the tip of the side attachment portion and formed to be inclined in a direction in which the first fastening piece and the second fastening piece approach each other A coupler including an insertion guide for avoiding interference with the heat sink side.
delete According to claim 1, wherein the element pressing plate is a guide inclined in the opposite direction to the inclination of the inclined connection part at the tip of the contact part and the contact part extending from the inclined connection part extending from the inclined connection part to be in close contact with the element body and extending obliquely from the main body. A coupler comprising an inclined portion.
In the heat dissipation device for an electrical device for receiving and discharging heat generated from the electrical device,
A heat dissipating fin for heat exchange with the atmosphere is provided on one side of a contact surface to which the electric element is closely attached, and a heat dissipation fin for heat exchange with the atmosphere is disposed on the other side, and a heat formed along an inclined surface at a position facing each other on the side walls formed on both sides of the contact surface sink,
The first and second fastening pieces on which the locking jaws are hung on the inclined jaws of the heat sink are provided side by side at both ends of the body, and the device pressing plates extend from the body so that the contact portions are in close contact with the surface of the electrical devices by elastic force to close the electrical devices. It includes a coupler to be in close contact with the contact surface,
A close contact piece is further provided at the front end of the first and second fastening pieces to be in close contact with the side surface of the electric element, the close contact piece extending from the clasp and in a direction in which the first fastening piece and the second fastening piece come closer to each other An inclined portion formed to be inclined, a side contact portion extending from the inclined portion and closely contacting the side surface of the electric device, and a side contact portion extending from the tip of the side attachment portion and formed to be inclined in a direction in which the first fastening piece and the second fastening piece approach each other A heat dissipation device for an electric device including an insertion guide for avoiding interference with the heat sink side.
The heat dissipating device for an electric device according to claim 4, wherein the main body of the coupler, the first and second fastening pieces, and the element pressing plate are made of a single metal plate.
[Claim 6] The heat dissipating device for an electric device according to claim 5, wherein the first and second fastening pieces are formed of a connecting part bent and extended from the main body and the engaging protrusion provided at the front end of the connecting part.
delete [Claim 7] According to any one of claims 4 to 6, wherein the element pressing plate has an inclined connection portion extending obliquely from the main body, and the contact portion extending from the inclined connection portion to be in close contact with the electric device and the inclined connection portion at the tip of the contact portion. A heat dissipation device for an electric device including a guide inclined portion inclined in the opposite direction to the inclination.

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