JP2011135013A - Electronic apparatus housing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exhaust gas generated in a housing to the outside without causing the infiltration of water droplets owing to a rainfall into the housing. <P>SOLUTION: In order to achieve the purpose, a housing having a vent hole is provided with a waterproof plate which covers the vent hole at a predetermined interval to the vent hole and has a waterproof surface, a waterproof part having a drain hole, and a ventilation part having the drain hole so as to form a triple-plate structure. Thereby, the gas generated in the housing is exhausted to the outside of the housing, and the water droplets which are infiltrated into the housing are shut off at the same time so as to permit infiltration control. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In particular, the present invention relates to a ventilation structure and a waterproof structure of an outdoor device type electronic device casing. In particular, to maintain the breathability and waterproofness of outdoor equipment such as radio base station equipment and repeaters in mobile communication systems such as radio communication systems and mobile phone systems, and outdoor loudspeakers provided for disaster prevention radio in each municipality. It is related with the electronic device housing | casing comprised.

  In wireless communication systems and mobile phone systems, wireless base station equipment is installed on the top of a steel tower with an antenna attached, such as on a hill or on the roof of a building, or near the base. The electronic device casing is installed in such a place and is used to protect the electronic device exposed to rain and wind. These electronic devices need to dissipate heat because heat is generated from the transmission unit and the power supply unit, and are devised to maintain air permeability and waterproofness without being sealed. For this reason, the electronic device casing has been required to have both the exhaust property for heat dissipation of the electronic device and the rainproof property for preventing rainwater intrusion.

  For example, in Patent Document 1, an electronic device storage box includes a ceiling plate that guides exhaust air from an electronic device exhausted from an internal exhaust port at the top of the housing portion to guide the exhaust from the electronic device to the outside. In addition, the ceiling plate is fixed through a plurality of ceiling plate mounting columns attached at arbitrary positions on the upper portion of the housing portion, and maintains a clearance for exhausting air that is exhausted from the entire periphery of the ceiling plate to the outside. It is formed in a structure and is arranged on the upper part of the accommodating part, and is configured so that the electronic device can be cooled.

  Further, for example, in Patent Document 2, an outdoor installation type electronic device storage box that stores an electronic device used outdoors includes a storage box body having an internal exhaust port for releasing heat generated by the electronic device by exhaust on its upper part, Two ceiling plate mounting angles are attached to the upper surface of the storage box main body so as to cover the upper surface of the storage box main body and to be parallel to the two sides of the upper surface of the storage box main body with an exhaust gap for guiding exhaust to the outside air. And a fixed ceiling board. An electronic device comprising a heat generating unit such as a transmission unit and a power source and a cooling fan is accommodated in the accommodating portion provided in the outdoor electronic device accommodating box. The outside air that is forcibly sucked from the bottom surface of the storage box body by the cooling fan of the electronic device cools the heat generating unit of the electronic device, and the heated air flow passes through the internal exhaust port on the top surface of the storage box body to the ceiling plate. Exhaust is mainly performed from the exhaust gap for exhaust on the two sides.

  When the case is installed outdoors, it is necessary to prevent water droplets due to rain from entering the case in addition to the exhaust structure as described in the above-mentioned patent document. In addition, in some cases, it is necessary to exhaust a gas such as hydrogen generated in the casing out of the casing. In the conventional technique, the electronic device casing is configured as shown in FIGS. 6 and 7, for example. 6 and 7, 1 is a housing, 2 is a ventilation hole provided in the housing 1, 3 is a ventilation portion attached to the housing 1, 4 is a ventilation hole provided in the ventilation portion 3, It is a filter provided between the housing 1 and the ventilation part 3. In FIG. 7, 11 is a water droplet generated by rainfall, and 12 is a gas generated in the housing 1. The gas 12 generated in the housing 1 passes through the vent hole 2 and moves from the housing 1 into the filter 5. The gas 12 in the filter 5 passes between the eyes of the filter 5 and moves into the ventilation part 3. The gas 12 in the ventilation part 3 is exhausted through the ventilation hole 4. On the other hand, water droplets 11 adhering to the outside of the housing 1 due to rainfall receive wind pressure due to rain and enter the ventilation portion 3 through the ventilation holes 4. Water droplets 11 in the ventilation portion 3 are blocked by the filter 5 and most do not enter the housing 1.

JP 2007-234922 A Japanese Patent Laid-Open No. 11-11534

Most of the water droplets that have entered the ventilation section are blocked by the filter and therefore do not enter the housing. There is a case of entering the housing from the ventilation hole inside. On the other hand, if a sealed structure prevents water droplets from entering the housing, unnecessary gas generated in the housing cannot be exhausted, and gas accumulates in the housing. In the worst case, the housing bursts. There is a possibility that.
An object of the present invention is to reliably prevent water droplets from entering a vent hole while ensuring the breathability of the vent hole provided in the housing.

  The electronic device casing of the present invention is an electronic device casing that houses an electronic device and has a vent hole, and has a waterproof surface that covers the vent hole with a predetermined distance from the vent hole. The first ventilation part, the second ventilation part provided with the first ventilation surface, the second ventilation part accommodated therein, and the second ventilation surface provided And a third vent part, wherein the second vent part and the third vent part are provided with a drain part for draining water that has penetrated into each of the second vent part and the third vent part.

  The electronic device casing of the present invention is characterized in that vent holes are provided in the second vent portion and the third vent portion.

  The electronic device casing of the present invention is characterized in that the size of the vent hole of the second vent is smaller than the size of the vent of the third vent.

  According to the present invention, it is possible to reliably prevent water droplets from entering the housing while ensuring air permeability.

The perspective view which shows the whole structure of this invention Exploded view showing the overall configuration of the present invention Structural drawing showing a ventilation part which is a partial configuration of the present invention Structural drawing showing a waterproof part which is a partial configuration of the present invention Structure diagram showing effects of the present invention Exploded view showing the overall structure of the prior art Structure diagram showing problems of conventional technology

  Embodiments according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an outdoor-type electronic device casing according to the present invention, and FIG. 2 is an exploded view of a gas exhaust portion which is a characteristic part of the present invention. In the present invention, as shown in these drawings, instead of the conventional filter 5, a waterproof part 6 and a waterproof plate 8 are provided inside the vent part 3, and the exhaust structure of the vent hole 2 is a triple plate structure. The structure is such that water droplets can be prevented from entering the housing. By adopting such a configuration, it is possible to prevent water droplets from entering the housing 1 as compared with the case where only the conventional filter 5 is installed.

  1 and 2, 1 is a housing, 2 is a ventilation hole, 3 is a ventilation part, 4 is a plurality of ventilation holes provided in the ventilation part, 6 is a waterproof part provided inside the ventilation part 3, and 7 is a ventilation part. A vent hole provided in the waterproof part 6, a waterproof plate provided inside the waterproof part 6, a drain hole provided in the bottom part of the vent part 3, and 10 provided in the bottom part of the waterproof part 6. It is a drain hole. The waterproof plate 8 is sized to cover at least all the vent holes 2, and here is sized to cover all the vent holes 7 provided in the waterproof portion 6. And the waterproof board 8 is attached to the housing | casing 1 so that the ventilation hole 2 may be covered with the predetermined space | interval (gap) with respect to the ventilation hole 2 provided in the side surface of the housing | casing.

  The ventilation part 3 is larger than the waterproof part 6 and is attached to the housing 1 so as to cover the waterproof part 6, and there is no opening other than the ventilation hole 4 and the drain hole 9. That is, as shown in FIGS. 3 and 5, the ventilation part 3 has a lid shape, and the waterproof part 6 is accommodated inside the ventilation part 3. Further, the waterproof portion 6 is larger than the waterproof plate 8 and has a structure in which the vent hole 4 is provided in the ventilation surface of the waterproof portion 6 facing the waterproof surface of the waterproof plate 8. Thus, the waterproof part 6 is attached to the housing 1 so as to cover the waterproof plate 8, and no opening is provided except for the vent hole 7 and the drain hole 10. That is, as shown in FIGS. 4 and 5, the waterproof part 6 has a lid shape, and the waterproof plate 8 is accommodated inside the waterproof part 6. In this way, openings such as holes are not provided on the upper surface and both side surfaces of the ventilation portion 3 and the waterproof portion 6, but appropriate sizes are provided on the opposing surface and the bottom surface of the ventilation portion 3 and the waterproof portion 6, respectively. Holes are formed.

  Next, the exhaust and waterproof action of the housing 1 will be described with reference to FIG. As shown in FIG. 5, the gas 12 generated in the housing 1 passes through the vent hole 2, passes through a slight gap between the waterproof plate 8 and the housing 1, and is exhausted into the waterproof portion 6. Subsequently, the gas 12 accumulated in the waterproof part 6 passes through the vent hole 7 of the waterproof part 6 and is exhausted to the inside of the vent part 3. Further, the gas 12 accumulated in the ventilation part 3 passes through the ventilation hole 4 and moves to the outside to complete the exhaust.

  In addition, some of the water droplets 11 generated due to rainfall or condensation may adhere to the outer surface of the ventilation portion 3. Most of the water droplets 11 adhering to the outer surface of the ventilation part 3 fall down along the outer surface of the ventilation part 3 due to gravity, and the intrusion into the ventilation part 3 is blocked. In some cases, the air passes through the ventilation hole 4 of the part 3 and enters the ventilation part 3. Most of the water droplets 11 that have entered the ventilation part 3 in this way are transmitted along the inner surface of the ventilation part 3 due to gravity and accumulated at the lower part of the ventilation part 3, and are discharged to the outside through a drain hole 9 provided on the bottom surface. Some of them are attached to the outer surface of the waterproof part 6 by receiving wind pressure due to rain or wind. Most of the water droplets 11 adhering to the outer surface of the waterproofing part 6 fall down along the outer surface of the waterproofing part 6 due to gravity, and intrusion into the waterproofing part 6 is blocked. It tries to enter the inside of the waterproof part 6.

  However, since the vent hole 7 of the waterproof part 6 is very small, the water droplet 11 hardly enters the waterproof part 6 from the vent hole 7 due to surface tension. Even if some of the water droplets 11 pass through the vent hole 7 and enter the waterproof part 6, most of the water drops fall down on the inner surface of the waterproof part 6 due to gravity and accumulate at the bottom of the waterproof part 6, and are provided on the bottom surface of the waterproof part 6. The water is discharged from the water drain hole 10 to the outside of the waterproof part 6. Even if the wind pressure is strong and the water droplet 11 is scattered in the direction of the vent hole 2, the waterproof plate 8 covering the entire surface of the vent hole 2 can block the intrusion into the vent hole 2. As a result, the water droplet 11 travels down the outer surface of the waterproof plate 8 due to gravity, accumulates in the lower portion of the waterproof portion 6, and is discharged to the outside of the waterproof portion 6 through a drain hole 10 provided on the bottom surface.

  On the other hand, when the waterproof plate 8 is fixed to the vent hole 2, the upper, lower, left and right side surfaces are not provided with a sealed structure, but are provided with a space through which gas can pass. In addition, the size of the vent hole 7 provided in the waterproof portion 6 is set such that a liquid such as the water droplet 11 is difficult to enter, but a gas such as hydrogen gas can be vented. In particular, since hydrogen gas is a substance having the smallest molecular weight among gases, it is easy to ventilate even in a very small space. Therefore, even if it is minute, it can be easily ventilated without a problem. The waterproof plate 8 may be fixed to the vent hole 2 by any fixing method such as fitting, welding, and screwing. Further, when the waterproof plate 8 is fixed to the vent hole 2, as shown in FIG. 2, a predetermined interval is provided with respect to the vent hole 2, and a foot is provided on the waterproof plate 8 so as to facilitate fixing. It is preferable to facilitate fitting, welding, screwing and the like.

  As described above, the exhaust structure of the gas exhaust portion of the housing 1 is a triple plate structure of the ventilation portion 3, the waterproof portion 6, and the waterproof plate 8, so that water droplets from the outside enter the housing 1. This can be prevented more reliably. Further, as a method for preventing the water droplet 11 from entering the housing 1, it is preferable to make the size of the hole 7 of the waterproof part 6 smaller than the hole 4 of the ventilation part 3. In other words, by making the size of the hole provided in the plate provided on the inner side smaller than the size of the hole provided on the plate provided on the outer side, it is possible to more reliably prevent water droplets from entering the inside. it can. Furthermore, it is preferable that the ventilation hole 4 of the ventilation part 3 and the ventilation hole 7 of the waterproof part 6 are arranged so as not to overlap each other, and a structure that prevents water droplets due to wind pressure or the like from easily entering the inside is preferable. .

  In the above-described embodiment, the exhaust structure for exhausting the gas accumulated in the housing 1 has been described. However, the present invention can also be applied to an intake structure for intake. That is, the ventilation part 3, the waterproof part 6, and the waterproof plate 8 can be applied to a general ventilation structure of the ventilation hole 2. Moreover, the shape of the vent holes 4 and 7 and the drain holes 9 and 10 is not limited to the shape shown in the figure, and any shape such as a round shape, a square shape, or an oval shape can be used as long as it has a vent function and a waterproof function. Any shape is acceptable.

  In the above-described embodiment, the drain holes 9 and 10 are provided on the bottom surfaces of the ventilation portion 3 and the waterproof portion 6. However, the bottom portion may not be provided, and the bottom portion may have a penetrating shape. Even if it is, it is good also as notch shape instead of providing the drain holes 9 and 10. FIG. That is, any structure may be used as long as the water droplet 11 that has entered the inside of the ventilation part 3 and the waterproof part 6 is transmitted by gravity and can be discharged to the outside.

  The object of the present invention is to create a flow of water droplets that have entered the ventilation section, efficiently discharge the water droplets, and in addition to a structure that can suppress the penetration of water droplets into the housing, The object is to solve the problem that harmful gases such as hydrogen can be efficiently exhausted. That is, in order to achieve the object, the present invention provides the filter 5 with the waterproof part 6 provided with a plurality of drain holes 9 on the bottom surface of the ventilation part 3 and provided with the drain holes 10 on the bottom surface inside the ventilation part 3. By providing a waterproof plate 8 in the interior of the waterproof portion 6, it is possible to prevent water droplets 11 from entering the housing 1, and there is a slight gap between the waterproof plate 8 and the vent hole 2 of the housing 1. In this structure, the gas 12 can be exhausted out of the housing 1.

  As described above, according to the present invention, since the gas generated in the casing is exhausted to the outside and water droplets due to rain can be discharged without entering the casing, the gas accumulates in the casing and the casing bursts. It is possible to prevent the electronic device from being leaked due to the inside of the housing being exposed to water droplets.

1: housing, 2: vent hole, 3: vent part, 4: vent hole, 5: filter, 6: waterproof part,
7: vent hole, 8: waterproof plate, 9: drain hole, 10: drain hole, 11: water drop, 12: gas

Claims (1)

An electronic equipment housing that houses electronic equipment and has ventilation holes,
A first ventilation portion having a waterproof surface that covers the ventilation hole at a predetermined interval with respect to the ventilation hole;
A second ventilation portion that houses the first ventilation portion therein and includes a first ventilation surface facing the waterproof surface;
A third ventilation part that houses the second ventilation part therein and has a second ventilation surface,
An electronic device casing, wherein the second ventilation portion and the third ventilation portion are each provided with a discharge portion for discharging water that has entered the interior.