JP2001274579A - Panel and communication system using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of mounting of a strong fan for heat radiation in a conventional system having a panel only causes failure such as corrosion with an electric/electronic part 13 and results in less reliability. SOLUTION: The heat generated at the electric/electronic part 13 on a printed board 11 is transferred to a heat conductive member 15 fully filled in a closed space 14, and then it is transferred to a cover 12 drawn from a thin metal plate material for heat dispersion. The surface of the cover 12 is corrugated for larger surface area, resulting in enlarged heat-radiation area for efficient heat radiation. Further, the cover 12 has a corrugated heat-radiation surface which is drawn from a thin metal plate material, so that electric/electronic part 13 is protected from corrosive causes (corrosive gas, dust, condensation and the like) in an installation environment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel and a communication device using the same, and more particularly to a panel in which an electronic circuit constituting the device is mounted on a printed board and a communication device using the same.

[0002]

2. Description of the Related Art FIG. 7 is an overall perspective view of an example of a conventional panel, and FIG. 8 is a perspective view of an example of a mounted state of the conventional panel. As shown in FIG. 7, a conventional panel 1 includes a plurality of electric / electronic components 3 for exerting an electric function on a printed board 2.
Is installed. A predetermined electronic circuit is configured by the plurality of electric / electronic components 3.

[0003] As shown in FIG. 8, a panel 1 having this configuration is composed of a plurality of panels sequentially arranged along a guide rail.
Since the space between the adjacent panels 1 is very small, and the high-density mounting is performed, how to dissipate the heat of the electric / electronic components 3 mounted on the printed board 2 depends on the device reliability. It is a point to improve the degree. It is also an important point how to eliminate the reliability reduction factor in the apparatus installation environment.

However, the conventional panel 1 has a printed board 2
Because it only mounts electric and electronic parts 3 on top,
Regarding the heat radiation of the electric / electronic parts 3, there is a heat radiation area only by the size of the parts, and a heat radiation measure is taken by mounting a fan.

[0005]

However, in a device equipped with the above-mentioned conventional panel, a powerful fan for heat dissipation is mounted, so that adverse effects in the device installation environment (corrosion gas, dust, dew condensation, etc.). However, there is a problem that the air is more strongly sucked into the device, adversely affecting the electric / electronic component 3 (eg, failure due to the occurrence of corrosion), and lowering the reliability.

[0006] The present invention has been made in view of the above points,
It is an object of the present invention to provide a panel capable of sufficiently dissipating heat and a communication device using the panel.

Another object of the present invention is to provide a panel capable of improving the reliability of a mounted device and a communication device using the same.

[0008]

In order to achieve the above object, a panel according to the present invention has a printed board on which electric and electronic components are mounted, and a printed board having at least a part of a corrugated cross section. It is composed of a cover made of a sheet metal material for covering the above electric and electronic components, and a heat conducting member that fills a closed space between the printed board and the cover without any gap.

According to the present invention, the closed space between the printed board and the cover is filled with the heat conductive member without any gap, and at least a part of the cross section of the cover has a corrugated shape. The heat generated in the electronic component can be transmitted to the cover having a large surface area through the heat conducting member.

In order to achieve the above object, a communication device according to the present invention provides a housing formed by vertically joining a lower case formed by die-casting (or a partially molded plastic product) and an upper case. What is claimed is: 1. A communication device including at least a panel on which electric and electronic components are mounted in a closed space in a body, comprising: a first printed board on which electric and electronic components are mounted; and an electric and electronic component on the first printed board. A first cover made of a sheet metal material, the first cover being made of a sheet metal material and having a surface tightly fixed to an inner surface of the lower case;
A first panel made of a first heat conductive member filled in a closed space between the covers without a gap, a second printed board on which electric and electronic components are mounted, and at least a corrugated cross-sectional shape. A second cover made of a sheet metal material, which is partially provided and covers the electric and electronic components on the second printed board; and a closed space between the second printed board and the second cover is filled without gaps. A second panel made of a second heat conductive member, a spacer for arranging the first and second panels with the first and second printed boards spaced apart from each other, and a surface of the second cover. A flexible sheet-like third member that connects to the inner surface of the upper case
And a heat conductive member are accommodated in a closed space in the housing.

According to the present invention, the heat generated by the electric / electronic parts mounted on the first printed board is transferred to the lower part which is in close contact with the first cover through the first heat conducting member and the first cover. It can be conducted to the case. Further, heat generated in the electric / electronic component mounted on the second printed board is conducted to the upper case through the second heat conductive member, the second cover, and the third heat conductive member. The second heat conductive member, the second cover, the third heat conductive member, and the upper case can increase the heat radiation area and increase the efficiency of heat transport.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of one embodiment of a panel according to the present invention, FIG. 2 is an exploded perspective view of one embodiment of a panel according to the present invention, and FIG. FIG. 2 shows a cross-sectional view along the line A. In each figure, the same components are denoted by the same reference numerals.

As shown in each of the drawings, a panel 10 of the present embodiment includes a printed board 11 on which a plurality of electric / electronic parts 13 are mounted, and covers the electric / electronic parts 13 on the printed board 11. A cover 12 having a corrugated cross-sectional shape formed by drawing a heat conductive sheet metal material (for example, aluminum, copper, or the like) and a closed space 14 between the printed board 11 and the cover 12 filled with heat without gaps. And a conductive member 15.

The heat conducting member 15 is made of, for example, a heat-curable silicone rubber or the like, and is provided for efficiently transmitting the heat generated from the electric / electronic parts 13 mounted on the printed board 11 to the cover 12. ing. Cover 1
2 has a heat-radiating surface having a corrugated cross section.

Next, a description will be given of an operation at the time of mounting the present embodiment. As shown in FIG. 4, a plurality of panels 10 are successively guided by guide rails, and
In the HF 16, the space between the adjacent panels 10 is extremely small and is mounted at a high density. In this mounting state, the heat generated from the electric / electronic components 13 on the printed board 11 is transmitted to the heat conducting member 15 filling the closed space 14 without any gap, and thereafter, the cover 12 drawn by a sheet metal material is drawn. Is dissipated and dissipated.

Here, the surface of the cover 12 has a corrugated cross-sectional shape and is formed with a large surface area.
The heat radiation area is enlarged, and heat is efficiently radiated. Further, since the cover 12 has a corrugated heat dissipation surface drawn and formed of a sheet metal material, the cover 12 protects the electric and electronic components 13 from corrosive factors (corrosion gas, dust, dew condensation, etc.) in the installation environment. Can be.

As described above, according to the present embodiment, the heat generated by the electric / electronic component 13 mounted on the printed board 11 efficiently transfers the heat conductive member 15 filled in the closed space 14 to the cover 12. And the heat is radiated from the heat radiating surface having a large area by the waveform of the cover 12, so that the heat radiating property can be improved.

Further, according to the present embodiment, since the electric / electronic component 13 mounted on the printed board 11 is covered by the cover 12, the electric / electronic component 13 is exposed to the corrosion factor (corrosion) of the installation environment. Gas, dust, dew condensation, etc.), thereby improving the reliability of the apparatus.

Next, an embodiment of the communication apparatus according to the present invention will be described. FIG. 5 is a perspective view of an embodiment of the communication device according to the present invention, and FIG. 6 is a sectional view taken along line A'-A 'of FIG. In both figures, the same components are denoted by the same reference numerals. As shown in both figures, the outdoor communication base station 20 which is the communication device of the present embodiment includes a lower case 21a formed by die-casting (or a partly molded plastic part) and a die-casting molded part (or partially molded plastic part). The electric / electronic component 13 housed in a closed space in a housing 22 formed by vertically attaching the upper case 21b to the upper case 21b.
a and 13b, and two printed boards
4 and a heat conducting member 26 and the like.

As shown in the cross-sectional view of FIG. 6, the lower case 21a has a printed board 11a on which a plurality of electric and electronic components 13a are mounted, and an electric and electronic component on the printed board 11a.
A cover 12a formed by drawing a heat conductive sheet metal material and covering the electronic component 13a, a printed board 11a and a cover 12a.
And a plurality of electric and electronic components 13b, each of which includes a heat conductive member 15a filled in a closed space without gaps therebetween.
Printed board 11b on which
A cover 12b having a corrugated cross-sectional shape and a closed space between the printed board 11b and the cover 12b are filled without gaps by drawing and forming a heat conductive sheet metal material that covers the electric / electronic component 13b on the base 1b. The second panel made of the heat conducting member 15b is spaced apart from the printed boards 11a and 11b by a spacer 23 with the printed boards 11a and 11b facing each other.

That is, the second panel has the structure of the above-described embodiment of the panel of the present invention, and the first panel has a cover 12a whose cross section is not corrugated. Except for this, the structure of the panel according to the present invention is the same as that described above. Also, the cover 12a of the first panel
Is fixed to the inner lower surface of the lower case 21a.

On the other hand, inside the upper case 21b, a printed board 24 is provided on a spacer 25 having one end fixed to the upper case 21b, and is in close contact with the cover 12b having a corrugated cross section, and , A flexible sheet-like heat conducting member 26 for conducting heat from the cover 12b to the upper case 21b is provided in close contact with the inner surface of the upper case 21b. The heat conducting member 26 is
For example, a commercially available graphite sheet different from the heat-curable silicone rubber used as the heat conducting members 15a and 15b is used.

The method of fixing the cover 12b and the heat conducting member 26 may be, instead of fixing with an adhesive, sandwiching the cover 12b with a press fitting adapted to the corrugated shape of the cover 12b. Further, the lower case 21a and the upper case 21b have a structure in which projections are provided at regular intervals to enhance heat dissipation.

In this outdoor communication base station 20, heat generated in the electric / electronic component 13a propagates through the heat conducting member 15a and is conducted from the cover 12a to the lower case 21a. And the lower case 12a is formed with projections and has a large surface area.
a is radiated into the air.

On the other hand, the heat generated in the electric / electronic component 13b propagates through the heat conducting member 15b and is conducted to the cover 12b, and further from the heat conducting member 26 to the upper case 21b. Here, since the heat radiation largely depends on the heat radiation area, the cross-sectional shape of the cover 12b is partially formed in a waveform, and the heat conductive member 26 is in close contact with the surface of the cover 12b which is largely formed by the waveform. In addition, the upper case 12b is formed with projections to form a large surface area, thereby increasing the heat radiation area and increasing the efficiency of heat transport. The heat generated by the electronic component 13b can be sufficiently radiated into the air by the cover 12b and the heat conducting member 26.

As described above, in the outdoor communication base station 20 of this embodiment, the plurality of electric / electronic components 13a and 13
Although a large number of panels b are mounted on the printed boards 11a and 11b and are housed in the housing 22, sufficient heat can be released from the heat of the electric / electronic component 13b located at the center, so that downsizing can be achieved. Not only is it possible to improve the reliability of the device.

Note that the present invention is not limited to the above-described embodiment, and for example, covers 12, 12a, 12
b may be formed by casting. In that case, it is necessary to use a metal material such as aluminum or magnesium and to form the thickness as thin as possible. In addition, printed board 1
1 may be covered with a cover 12 having a corrugated heat radiating surface on both sides. Further, in order to increase the degree of sealing of the closed space 14, a packing is attached to the entire periphery of the opening of the cover 12 having a corrugated heat radiating surface. Is also good.

[0028]

As described above, according to the panel of the present invention, the closed space between the printed board and the cover is filled with the heat conductive member without any gap, and at least a part of the cross-sectional shape of the cover is corrugated. By adopting the shape, the heat generated in the electric / electronic parts mounted on the printed board is transmitted to the cover having a large surface area through the heat conducting member, so that the heat can be efficiently radiated. Further, according to the panel of the present invention, since the electric and electronic parts are covered with the cover, the electric and electronic parts can be protected from corrosive factors (corrosion gas, dust, dew, etc.) in the installation environment.

Further, according to the communication device of the present invention, the heat generated by the electric and electronic components mounted on the first printed board can be efficiently conducted to the lower case, while the second The heat generated by the electric / electronic components mounted on the printed board passes through the second heat conducting member, the second cover, and the third heat conducting member, which aim to increase the heat radiation area and increase the efficiency of heat transport. Since the heat can be conducted to the upper case, any heat can be sufficiently dissipated into the air, and the heat dissipation can be improved.

Further, according to the present invention, the electric and electronic components mounted on the first and second printed boards, respectively,
The electric and electronic components are protected from corrosion factors (corrosion gas, dust, dew condensation, etc.) in the installation environment by being covered with the first and second covers, respectively, so that communication by preventing the corrosion factors in the installation environment is performed. The reliability of the device can be improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an embodiment of a panel according to the present invention.

FIG. 2 is an exploded perspective view of one embodiment of the panel according to the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a perspective view showing a mounted state of the panel according to the present invention.

FIG. 5 is a perspective view of one embodiment of a communication device according to the present invention.

FIG. 6 is a sectional view taken along the line A′-A ′ of FIG. 5;

FIG. 7 is an overall perspective view of an example of a conventional panel.

FIG. 8 is a perspective view showing a mounting state of a conventional panel.

DESCRIPTION OF SYMBOLS 10 Panel 11, 11a, 11b, 24 Printed board 12, 12a, 12b Cover 13, 13a, 13b Electric / electronic component 14 Closed space 15, 15a, 15b, 26 Heat conductive member 20 Outdoor communication base station 21a Lower case 21b Upper case 22 Housing 23, 25 Spacer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazutoshi Ono 350 Kamikusayanagi, Yamato-shi, Kanagawa F-term in NEC Wireless Electronics Co., Ltd. (reference) 5E322 AA01 AA03 AB06 AB11 FA05

Claims (6)

[Claims] 1. A printed board on which electric / electronic components are mounted, a cover made of a sheet metal material having at least a part of a corrugated cross-sectional shape and covering the electric / electronic components on the printed board, A panel comprising a heat conducting member that fills a closed space between the printed board and the cover without any gap. 2. The panel according to claim 1, wherein the cover is formed by drawing or casting. 3. The panel according to claim 1, wherein the heat conductive member is made of heat-curable silicone rubber. 4. A panel in which electric and electronic components are mounted at least in a closed space in a housing formed by vertically joining a lower case formed by die-casting (or a partly molded plastic product) and an upper case. A communication device accommodated therein, wherein the first printed board on which electric / electronic parts are mounted, and the electric / electronic parts on the first printed board are covered, and a surface is provided on an inner surface of the lower case. A first cover made of a sheet metal material fixedly adhered to the first cover, and a first space filled in a closed space between the first printed board and the first cover without any gap.
A first panel made of a heat conductive member, a second printed board on which electric and electronic components are mounted, and a portion having at least a corrugated cross-sectional shape, and the second printed board on the second printed board. A second cover made of a sheet metal material for covering electric and electronic components, and a second heat conductive member filled in a closed space between the second printed board and the second cover without any gap. A second panel, a spacer for arranging the first and second panels with the first and second printed boards spaced apart and facing each other, and joining a surface of the second cover and an inner surface of the upper case. A communication device, wherein a flexible sheet-shaped third heat conductive member is accommodated in a closed space in the housing. 5. The communication device according to claim 4, wherein the cover is formed by drawing or casting. 6. The communication device according to claim 4, wherein the heat conductive member is made of a heat-curable silicone rubber.