JPH07202459A - Heat dissipation structure - Google Patents

Abstract

PURPOSE:To facilitate the manufacturing and assembling works, while enhancing the mechanical strength, by decreasing the number of components. CONSTITUTION:First and second protruding hinge parts 4, 5 are provided on the opposite sides of split case bodies 1A, 1B having an identical shape and facing each other. First and second fixing members 2, 3 are then inserted into first and second through holes 4a, 5a made through the hinge parts 4, 5. The fixing members 2, 3 penetrate the protruding hinge parts 4, 5 of the split case bodies 1A, 1B, respectively, and tighten the heat dissipating members thus assembling the case 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipation structure for a power supply device or the like in which a heating element such as a triac is incorporated.

[0002]

2. Description of the Related Art Conventionally, as this type of heat dissipation structure, for example, a printed wiring board electrically connected to electronic components forming a power supply circuit and an opening / closing control circuit is housed in a case, and each of the three-phase alternating currents in the board is accommodated. It is known that a heating element such as three triacs for controlling the opening and closing of phases is brought into contact with a heat radiation member and the heat generated by the heating element is released to the outside of the case via the heat radiation member.

[0003]

However, it is necessary to form a case by closing the opening of the case main body in which the electronic parts, the printed wiring board, etc. are set with a cover and fastening the four corners with a screw. Therefore, the number of parts is large, and the manufacturing and assembling operations are complicated and troublesome. Also,
When the four corners of the case body and the cover are screwed together, if the tightening force of each screw body is different, the assembled case is likely to be deformed or damaged by stress strain. Furthermore, if the case is thin, it may be easily deformed to damage not only the case itself but also the electronic components housed therein.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a heat dissipation structure having a high mechanical strength, which facilitates manufacturing and assembling work with a small number of parts. .

[0005]

Claims according to the present invention
In the heat dissipation structure, a case body formed by dividing a case having a substantially rectangular shape into two and formed into substantially the same shape, and a first hinge projecting portion projecting from one side of each case body facing each other. And a second hinge protrusion formed on the other side, and first and second through holes formed on the hinge protrusion located on an axis substantially parallel to the corresponding sides. When,
Each of the through holes includes a rod-shaped first and second fixing member that is inserted into each of the through holes, and a heat radiating member that is fastened together with the case main body by each fixing member.
The first hinge protrusions projecting on one of the split case bodies and the second hinge protrusions projecting on the other of the split case bodies are respectively passed through the heat dissipating member in a retaining state. It is characterized in that the respective divided case bodies are combined and the case is assembled in a state where the heat dissipation members are fastened together.

According to a second aspect of the present invention, in the heat dissipation structure, the heat dissipation member is set outside the case, the heat generating member mounted on the case side is brought into contact with the heat dissipation member, and the heat generating member is insulated by the side wall of the case. It is characterized in that it is configured in.

According to a third aspect of the present invention, there is provided a heat dissipation structure in which a long hole is formed in an end surface of the heat dissipation member, a heating element is housed in the long hole, and a fastening member screwed into a wall facing the long hole is tightened. It is characterized in that the heating element is pressure-bonded to the opposing wall of the heat dissipation member via an electrical insulator.

[0008]

According to the heat dissipating structure of the present invention, if the divided case bodies having substantially the same shape are joined by two fixing members,
Since the predetermined case is configured, not only the number of parts is reduced by half as compared with the conventional case, but also the manufacturing and assembling work thereof is extremely simple, easy and inexpensive.

Further, when assembling the above-mentioned case, since the rod-shaped fixing members are inserted into the divided case bodies along the ridgelines forming the opposing sides having relatively high mechanical strength, the tightening force of each fixing member is increased. Even if it is slightly different, the assembled case is not likely to be easily deformed or damaged.

Further, since a rod-shaped fixing member is inserted into the case along the ridgeline of the opposite side, each fixing member reinforces the opposite side, further increasing the mechanical strength of the case. be able to. Therefore, even if the case is formed thin, the mechanical strength of the case itself is improved, its deformation is effectively prevented, and the electronic components housed therein can be effectively protected.

According to the heat dissipating structure of the second aspect, since the heating element is set outside the case and is insulated by the side wall thereof, the heat generated by the heating element adversely affects the electronic components inside the case. It can be effectively prevented.

According to the heat dissipating structure of the third aspect, the heat generating element is formed by the elongated hole formed in the end surface of the heat dissipating member and the tightening member screwed into the screw hole through the through hole formed in the opposing wall. Since it is pressure-bonded to the heat-dissipating member, the pressure-bonding can be easily and easily achieved, and the heat-dissipating effect can be enhanced to prevent overheating of the heating element and more effectively prevent adverse effects on the electronic component. it can.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an example of a case in the heat dissipation structure according to the present invention. In the figure, 1
Is a substantially rectangular case, and the case 1 is divided into two and has divided case bodies 1A and 1B formed into substantially the same shape.
It is composed of first and second rod-shaped fixing members 2 and 3.

Each of the divided case bodies 1A, 1B is provided with a first hinge projection 4 on one side thereof facing each other and a second hinge projection 5 on the other side thereof. Each of these hinge protrusions 4 and 5 has a divided case body 1
First and second through holes 4a and 5a are formed on axial lines a and b that are substantially parallel to the opposite sides of A and 1B.

The fixing members 2 and 3 have, for example, threaded portions 2a and 3a formed at the tips thereof, and the through holes 4a and 5 are formed.
It is configured so that it is inserted into a, and its tip screw portions 2a and 3a are screwed into a heat dissipation member described later. As shown in FIG. 2, each of the hinge protrusions 4 and 5 is formed in a substantially U-shaped cross section and has groove portions 4b and 5b.
b and 5b also serve as the first and second through holes 4a and 5a.

The first hinge protrusion 4 is long and short, the second hinge protrusion 5 is short and tall, and both of the split case bodies 1A, 1B are formed. When the axes a and b are aligned as shown in FIG. 3, the second hinge protrusions 5 are arranged at both ends of the first hinge protrusion 4, and the first and second penetrating portions are penetrated. The holes 4a, 5a are arranged in a straight line along the axes a, b, and the fixing members 2,
The tip screw portions 2a and 3a after the insertion of the screw 3 are screw holes 10a and 10a of the heat dissipation member 10 as shown in FIG. 5, for example.
The divided case bodies 1A and 1B are integrally coupled with each other with the heat radiation member 10 fastened together, and the case 1 is assembled.

On the other hand, a printed wiring board 11 is housed inside the case 1 as shown in FIG. 4, and an electronic component 12 constituting a power supply circuit and its opening / closing control circuit is mounted on the board 11 for electrical connection. The heating elements 13 such as three triacs for controlling the opening / closing of each phase of the three-phase alternating current are led out of the case 1 and inside the elongated hole 10b formed in the end surface of the heat dissipation member 10. It is stored in.

As shown in FIGS. 6 and 7, the heating element 13 is housed inside an elongated hole 10b formed on the end face of the heat dissipation member 10 outside the case 1, and the elongated hole 10 is formed.
b through the through hole 10e formed in the opposing wall 10c.
4 is inserted into the screw hole 10f formed in the opposite wall 10d of the other end of the fastening member 14, and the opposite walls 10c and 10d are brought close to each other, so that the heat dissipation member 10 is electrically connected. It is crimped via the insulator 15.

According to the above construction, if the divided case bodies 1A and 1B having substantially the same shape are joined by the two fixing members 2 and 3, the case 1 is constructed and the heat radiating member 1 is formed.
In order to complete the assembly of the power supply device, the divided case bodies 1A and 1B are integrally joined in the state of 0 tightening together.
Not only the number of parts is reduced by half as compared with the conventional one, but also the manufacturing and assembling operations are extremely simple, easy and inexpensive.

When the case 1 is assembled, along the ridgeline that forms the opposite side having relatively high mechanical strength,
A bar-shaped fixing member 2 is attached to each of the divided case bodies 1A and 1B.
Since 3 is inserted, even if the tightening force of each fixing member 2 and 3 is slightly different, there is no risk that the assembled case will be easily deformed or damaged due to stress strain.

Further, since the rod-shaped fixing members 2 and 3 are inserted into the case 1 along the lines of the opposite sides, the fixing members 2 and 3 reinforce each opposite side,
The mechanical strength of the case 1 can be further increased.
Therefore, even if the case 1 is formed thin and an external force is applied, the case 1 itself is effectively prevented from being deformed due to the improved mechanical strength, and the electronic component 1 housed in the case 1 is prevented.
2 and 13 can be effectively protected.

Furthermore, according to the above configuration, the heating element 1
Since 3 is set outside the case 1 and is insulated by the side wall 1a thereof, it is possible to effectively prevent the heat generation of the heating element 13 from adversely affecting the electronic component 12 inside the case 1.

Further, since the heating element 13 is pressure-bonded to the heat radiating member 10, its heat radiation effect is enhanced to prevent overheating of the heating element 13 and more effectively prevent adverse effects on the electronic component 12. be able to.

Further, the pressure-bonding structure of the heat-generating body 13 to the heat-dissipating member 10 is such that a screw hole is formed through the elongated hole 10b formed in the end surface of the heat-dissipating member 10 and the through hole 10e formed in the opposing walls 10c and 10d. This is achieved by the tightening member 14 screwed into 10f, and the pressure bonding of the heating element 13 is achieved simply and easily by utilizing the heat dissipation member 10.

[0025]

As described above, according to the present invention, it is possible to provide a heat dissipation structure having a high mechanical strength with a small number of parts for facilitating the manufacturing and assembling work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an example of a heat dissipation structure according to the present invention with respect to a case structure portion.

FIG. 2 is a sectional view taken along the line AA of FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is a plan view showing a notched part of the heat dissipation structure.

FIG. 5 is a perspective view showing an example of a heat dissipation member in the embodiment.

6 is a cross-sectional view taken along the line CC of FIG.

7 is a cross-sectional view taken along the line DD of FIG. DESCRIPTION OF SYMBOLS 1 Case 1A, 1B Divided case main body 1a Side wall 2 First fixing member 3 Second fixing member 4 First hinge protrusion 4a First through hole 5 Second hinge protrusion 5a Second through hole DESCRIPTION OF SYMBOLS 10 Heat-radiating member 13 Heat-generating body 10b Oblong hole 10c, 10d Opposing wall 15 Electrical insulator a, b Axis

Claims (3)

[Claims] 1. A split case body formed by splitting a substantially rectangular case into two and having substantially the same shape, and a first hinge projecting portion projecting from one side of each split case body facing each other. And a second hinge projecting portion projecting on the other side, and first and second through holes formed on the hinge projecting portion located on an axis substantially parallel to the corresponding sides. When,
It is provided with rod-shaped first and second fixing members that are respectively inserted through the respective through holes, and a heat radiating member that is fastened together with the case bodies by the fixing members. The first hinge protrusions projecting from the case body and the second hinge protrusions projecting from the other split case body respectively penetrate through the heat dissipating member so as to prevent the heat splitting from occurring. A heat dissipating structure, characterized in that the case bodies are joined together and the case is assembled with the heat dissipating members fastened together. 2. The heat dissipating member is set outside the case, and a heating element mounted on the case side is brought into contact with the heat dissipating member,
The heat dissipation structure according to claim 1, wherein the heat generating element is configured to be thermally insulated by a side wall of the case. 3. An elongate hole is formed on an end face of the heat dissipation member, a heating element is housed in the elongate hole, and a fastening member screwed into a wall facing the oblong hole is tightened so that the heating element is a heat dissipation member. The heat dissipation structure according to claim 2, wherein the heat dissipation structure is configured to be pressure-bonded to the opposing wall via an electric insulator.