JPH0744075Y2 - Electronic device housing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a housing structure of an electronic device having a high-frequency electronic circuit housed therein.

[Prior Art] In recent years, CATV (cable television) systems and LANs
A communication system for transmitting information via various communication lines such as a (local area network) system has been put into practical use.

In this type of communication system, various high-frequency electronic devices such as a repeater, an amplifier, or a branching device are connected in the middle of a transmission line. These high-frequency electronic devices include noise signals from the outside or high-frequency signals. In order to prevent the leakage of water and the adverse effects of environmental changes, it is hermetically housed in a metal casing having a high electromagnetic shielding property.

[Problems to be Solved by the Invention] However, since the high-frequency electronic device always generates heat due to continuous use of the communication line, it is possible that the high-temperature air caused by this heat is released to the outside in the sealed housing. If this is not possible, the electronic device may be damaged due to the temperature rise inside the housing due to direct sunlight or the like.

Therefore, it is conceivable to provide a hole for heat dissipation in the housing in which the high-frequency electronic device is accommodated, but simply providing the heat dissipation hole cannot provide sufficient waterproofing.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a housing structure of an electronic device capable of obtaining sufficient heat dissipation performance and electromagnetic shielding performance without deterioration of waterproof performance.

[Means for Solving the Problems] That is, the housing structure of an electronic device according to the present invention is one in which a high-frequency electronic circuit is housed, and has a metal housing body having an opening on one side, A metallic lid that closes the opening of the housing body, a conductive seal member and a waterproof member that are provided in parallel between the opening edge of the housing body and the lid, and the housing body A metal and annular waterproof dam that is erected around the exhaust opening formed on the upper side surface of the waterproof dam, and a waterproof metal that is arranged so as to cover the opening surface and the outside of the waterproof dam with a predetermined gap. It is provided with a cover and a metal waterproof ventilation cover which is provided so as to cover the intake opening formed on the lower side surface of the casing body and has a water droplet intrusion prevention structure and a ventilation structure.

[Operation] That is, for example, water due to rainfall does not reach the exhaust opening of the main body of the housing by the waterproof cover and the waterproof dam, and is ventilated from the exhaust opening through the gap between the waterproof dam and the waterproof cover. At the same time, the gap is provided with the metal members intertwined with each other, so that waterproof, ventilation, and electromagnetic shield effects can be obtained.

In this case, as the waterproof ventilation cover on the lower surface of the housing body, for example, a metal mesh plate laminated in a few layers or a few
By using the metal plates that are alternately arranged in layers,
It can maintain waterproofness, ventilation, and electromagnetic shielding.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 (A) and 1 (B) are a front view and a side view, respectively, showing a housing structure of an electronic device, and FIGS. 2 (A) and 2 (B) are a front sectional view and a side sectional view, respectively, showing the structure. is there.

In FIGS. 1 and 2, reference numeral 11 denotes a metal housing body in which a high-frequency device is housed, and an opening 11a provided on the front side surface of the housing body 11 has a metal lid 12 Is provided so as to be openable and closable by fixing one side thereof to the housing main body 11 with three hinges 13a to 13c, and the other side is provided with three engaging and disengaging metal fittings 14a to 1c.
It is fixed by 4c and is detachable. Further, a metal back cover 16 is provided on the back side surface of the housing body 11 via spacers 15A to 15c.

On the other hand, a circular exhaust opening 17 is provided at the center of the upper side surface of the housing body 11, and a cylindrical metallic waterproof dam 18 is provided upright around the exhaust opening 17. This waterproof dam 18
Is for preventing the water from reaching the exhaust opening 17 when water enters the upper surface of the casing body 11, and the water of the waterproof dam 17 on the upper surface of the casing body 11 is prevented. Further, on the outer periphery, a U-shaped waterproof dam 19 made of metal and having a U-shape is set upright with the housing 12 side facing down. This U-shaped waterproof dam 19
Is for flowing the water to both sides and the back side of the casing body 11 when the water penetrates along the lid 12 on the upper side surface of the casing body 11. A waterproof cover 20 is provided on the upper side surface of the housing main body 11 provided with the dam 18 so as to cover the opening surface of the waterproof dam 18 and its outer periphery with a predetermined gap.

The waterproof cover 20 is provided on an outer cover 20a that covers the entire upper side surface of the casing body 11, and an inner cover 20 that is provided in the center of the rear surface of the outer cover 20a and that covers only the waterproof dam 18 from the upper portion.
The inner cover 20b is arranged with a predetermined gap between the waterproof dam 18 and the U-shaped waterproof dam 19, and the outer cover 20a has its side surface on the side surface of the housing body 11. Is placed with a predetermined gap A therebetween. In this case, the gap A between the side surface of the outer cover 20a and the housing body 11
And the hanging width B of the side surface of the outer cover 20a with respect to the housing body 11 is set to A≈2B. In addition, the waterproof dam 18 and U
The gap between the character waterproof dam 19 and the inner cover 20b is set to the minimum width that allows ventilation.

FIG. 3 shows a closing surface of the lid body 12 with respect to the housing body 11. The outer edge and the inner side of the lid body 12 are arranged in parallel at the peripheral edge portion corresponding to the opening edge portion of the housing body 11. A waterproof member 21 and a shield member 22 are provided.

Further, an intake opening 23 is provided on the lower side surface of the housing body 11, and a waterproof ventilation cover 24 is provided to the intake opening 23 so as to cover the opening 23. As shown in FIG. 2 (A), this waterproof ventilation cover 24 uses three metal mesh plates 25a to 25c stacked in three layers, or as shown in FIG. 2 (B). Three metal plates 26a-26c
Are alternately inserted into each other, and in this case, the metal plates 26a to 26c are arranged such that their tip ends are lowered from the base side.

FIG. 4 shows the waterproof ventilation cover 24 using the metal mesh plates 25a to 25c as seen from the lower side of the housing body 11. The metal mesh plates 25a to 25b are generally hard to transmit radio waves. In addition, air can easily pass through, and the three-layer structure prevents water droplets from entering the inside of the housing body 11.

FIG. 5 shows a waterproof ventilation cover 24 using the metal plates 26a to 26c.
The metal plates 26a to 26c of the waterproof ventilation cover 24 are arranged in an interleaved manner with a minimum gap that allows ventilation, respectively, for electromagnetic shielding. At the same time, by lowering each of the metal plates 26a to 26c toward the tip thereof, water droplets do not enter the inside of the housing body 11.

That is, in the case structure of the electronic device having the above configuration, when the high-frequency electronic device is housed and operated inside the case body 11, outside air is waterproofed and ventilated by convection of air inside the case body 11 caused by heat generation. The hot air introduced into the housing body 11 through the intake opening 13 through the cover 24 and generated inside the housing body 11 flows from the exhaust opening 17 into the waterproof dam 18, the U-shaped waterproof dam 19 and the inside. It is discharged to the outside through a complicated gap between the cover 20b and the outer cover 20a.
As a result, the inside of the housing body 11 is constantly ventilated, and the high-frequency electronic device is unlikely to be damaged by high temperatures.

In this case, since the air intake path on the side of the waterproof ventilation cover 24 is formed of, for example, a three-layer structure of mesh plates 25a to 25c made of metal, even if water drops such as rain are blown up, the housing main body 11 Water does not penetrate into the interior of the.
Also, the exhaust path on the waterproof dam 18 side is
And the inner cover 20b, the U-shaped waterproof dam 19, and the outer cover 20a are formed by a vertically interlocked gap, so that, for example, from the space between the waterproof cover 20 and the lid 12 to the housing main body 11
Even if water enters the upper side surface of the U-shaped waterproof dam 19, it first flows along the outer wall of the U-shaped waterproof dam 19 to both side surfaces and the back side surface of the housing body 11, and also enters the inside of the U-shaped waterproof dam 19. Even in such a case, the water will flow along the outer wall of the waterproof dam 18 to the back side surface of the housing body 11, so that water does not enter the inside of the housing body 11. Then, the opening edge portion of the housing body 11 and the lid body 12 are tightly closed by the waterproof member 21, so that water does not enter the housing interior 11 from this portion.

Further, not only are the housing body 11 and lid 12 and other components made of metal, but the intake opening 23 side is provided with a waterproof ventilation cover 24 using mesh plates 25a to 25c, and the exhaust opening 17 is provided. Side is a waterproof dam that corresponds to multiple shields 1
8, U-shaped waterproof dam 19, waterproof or bar 20 is installed side by side, and since the shield member 22 is provided in the part in close contact with the lid 12, mixing of external signals and high frequency signal leakage, etc. There will be no adverse effects due to lack of shield.

Therefore, according to the housing structure of the electronic device configured as described above,
Both contradictory housing performances such as ventilation performance and waterproof / shielding performance can be sufficiently satisfied.

[Advantages of the Invention] As described above, according to the present invention, a high-frequency electronic circuit is housed inside, and a metal housing body having an opening on one side and an opening of the housing body are closed. A metal lid,
A conductive seal member and a waterproof member, which are provided in parallel between the opening edge portion of the housing body and the lid body, and are provided upright so as to surround the exhaust opening formed on the upper side surface of the housing body. A metal and annular waterproof dam, a metallic waterproof cover arranged so as to cover the opening surface and the outside of the waterproof dam with a predetermined gap, and an air intake formed on the lower surface of the casing body. Since it is provided with a metal waterproof ventilation cover provided so as to cover the opening and having a water drop intrusion prevention structure and a ventilation structure, for example, water due to rainfall is discharged to the exhaust opening of the main body of the casing by the waterproof cover and the waterproof dam. Ventilation is performed from the exhaust opening through the gap between the waterproof dam and the waterproof cover without reaching, and the gap is provided by the metal members interlocking with each other, so that the waterproof, ventilation, and electromagnetic shielding effects are achieved. But Will be used, without the waterproof performance is deteriorated, it is possible to obtain sufficient heat radiation performance and electromagnetic shielding performance.

[Brief description of drawings]

1 (A) and 1 (B) are front and side views, respectively, showing a housing structure of an electronic device according to an embodiment of the present invention, and FIGS. 2 (A) and 2 (B) are respectively the electronic device of FIG. FIG. 3 is a front sectional view and a side sectional view showing the housing structure, FIG. 3 is a view showing a closing surface of the lid body with respect to the housing body in the housing structure of the electronic device, and FIG. 4 is a housing structure of the electronic device. FIG. 5 is a diagram showing a waterproof ventilation cover using a metal mesh plate, and FIG. 5 is a diagram showing a waterproof ventilation cover using a metal plate in the housing structure of the electronic device. 11 …… Case body, 11a …… Case opening, 12 …… Cover, 13a ～
13c …… Hinges, 14a to 14c …… Disengagement fittings, 17 …… Exhaust opening, 18 …… Waterproof dam, 19 …… U-shaped waterproof dam, 20 …… Waterproof cover, 20a …… Outer cover, 20b …… Inside Cover, 21 …… Waterproof member, 22 …… Shield member, 23 …… Intake opening, 24 ……
Waterproof ventilation cover, 25a-25c …… Metal mesh plate, 26a
~ 26c …… Metal plate.

Claims (1)

[Scope of utility model registration request] 1. A housing structure for an electronic device having a high-frequency electronic circuit housed therein, the housing body being made of metal, the housing body having an opening on one side surface, and the metal lid body closing the opening of the housing body. A conductive seal member and a waterproof member that are provided in parallel between the opening edge portion of the housing body and the housing, and surround the exhaust opening formed on the upper side surface of the housing body. A metal and annular waterproof dam to be installed, a metal waterproof cover arranged so as to cover the opening surface and the outside of the waterproof dam with a predetermined gap, and formed on the lower surface of the casing body. And a metal waterproof ventilation cover which is provided so as to cover the intake opening and has a water droplet entry prevention structure and a ventilation structure.