JP2014086636A - Housing structure of electrical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing structure of electrical apparatus in which the water from a discharge hole, for discharging the water entered into the housing to the outside thereof, can be prevented from entering the housing again.SOLUTION: A housing structure of an electrical apparatus X is provided with a housing Y having an apparatus body 10 and a sealing body 20 covering at least a part of the apparatus body 10, and a discharge hole 25 for discharging water entered into the housing Y to the outside thereof, formed in the sealing side face of the sealing body 20. In an installation position where the housing Y is installed vertically, a portion 50 curved in a concave shape in the plan view, and a discharge hole rib 25a formed over the discharge hole 25 so as to lead the water discharged from the discharge hole 25 through the curved portion 50 below the housing Y are provided, along the sealing side face, at least below the discharge hole 25 in the sealing side face of the sealing body 20.

Description

  The present invention relates to a housing structure provided with a drainage structure for discharging water that has entered the internal space of an electrical device to the outside of the electrical device in a disaster prevention or crime prevention electrical device installed on a wall surface.

  One type of electrical equipment is an alarm device for disaster prevention or crime prevention installed on a wall surface. Since such an electric device normally needs to maintain its function even when the alarm device is exposed to water, for example, a drainage structure for draining water that has entered the alarm device is provided. Provided.

  For example, as the water draining structure, Patent Document 1 describes a water stop wall provided between an apparatus main body and a sealing body that covers at least a part of the apparatus main body. The water blocking wall is specifically a rising portion formed in the device main body, and a plurality of water blocking ribs are formed on the peripheral surface of the rising portion. The plurality of water blocking ribs are arranged at a predetermined interval from each other, and can block the water that has entered the first water blocking rib. Even if water tries to enter the internal space side of the electrical equipment beyond the first water stop rib, the water can be sequentially blocked by the next water stop rib.

  The plurality of water stopping ribs form a wall of a water drainage channel for draining water entering the inside of the electric equipment to the outside. One or a plurality of such drainage paths are formed according to the number of the water stop ribs. The drainage path is continuously formed without interruption from the upper part of the apparatus main body to the side part and further to the lower part in the posture in which the electric apparatus is installed. Therefore, when the invading water is blocked by the first water stop rib, it reaches the lower part of the device main body through the first water drainage path. Even if the water that has infiltrated climbs over the first water stop rib, it is blocked by the next water stop rib and passes through the next water drainage path to the lower part of the device body. In this way, the drainage effect can be enhanced by the drainage path, and water can be prevented from entering the internal space side of the device body.

JP 2007-102555 A

  For example, when a drain hole is formed on the side surface of the housing, the gap formed in the housing while water discharged from the drain hole moves to the lower portion of the housing along the side surface of the housing. Therefore, there is a risk of entering the inside of the electric device again.

  In the drainage structure described in Patent Document 1, the water that has entered the inside of the electrical device is drained to the outside through the drainage path, but once the drained water has entered the interior of the electrical device again. It is not a structure that prevents this.

  Accordingly, an object of the present invention is to provide a housing structure of an electric device that can prevent water from a discharge hole that discharges intruded water to the outside of the housing from entering the inside of the housing again.

  In order to achieve the above object, a first characteristic configuration of a housing structure of an electrical device according to the present invention is a housing having a device body and a sealing body covering at least a part of the device body, and a side surface of the sealing body. A discharge hole for discharging water that has entered the inside of the housing to the outside of the housing, and when the housing is installed vertically, the side surface of the sealing body is at least below the discharge hole. Further, along the side surface, the curved portion curved in a concave shape in a cross-sectional view and the water discharged from the discharge hole across the discharge hole so as to guide the water downward through the curved portion. And a formed discharge hole rib.

  According to this structure, a channel-shaped dent can be formed along the side surface by forming the curved portion having a concave shape in sectional view along the side surface of the sealing body. Thus, in the installation posture, the curved portion is provided at least below the discharge hole. Therefore, in the installation posture, the water discharged from the discharge hole is transmitted through the passage-shaped curved portion, and the water is discharged. It becomes easy to guide below the box. At this time, since the curved portion is formed on the side surface of the sealing body, it is difficult for water discharged from the discharge hole to flow toward the gap of the housing (for example, the gap between the device main body and the sealing body). Therefore, it becomes difficult for the water discharged from the discharge hole to enter the electric device through the gap again.

  Further, by providing the discharge hole rib over the discharge hole, it becomes easy to guide the water to be discharged from the discharge hole to the curved portion immediately, thereby reliably guiding the water below the housing.

  The 2nd characteristic structure of the housing structure of the electric equipment which concerns on this invention exists in the point which formed the said curved part in the lower surface of the said sealing body in the said installation attitude | position, and formed the recessed part in this curved part.

  According to this configuration, for example, when water discharged from the discharge hole is guided to the lower side of the housing via the curved portion formed on the side surface of the sealing body, such water is It moves to the recessed part of the curved part formed in the lower surface. At this time, the water easily moves along the end portion of the recess, and water droplets are easily formed at the end portion. And when it grows to a certain size of water droplets, it drops down below the electrical equipment. As described above, in this configuration, the water discharged from the discharge hole is difficult to flow toward the gap of the housing, and the water discharged from the discharge hole can be efficiently dropped.

It is a perspective view which shows the outline | summary of an electric equipment. It is a disassembled perspective view of an electric equipment. It is a cross-sectional schematic diagram (III-III cross-sectional view of FIG. 1) of the electrical equipment. It is a section schematic diagram (IV-IV sectional view of Drawing 1) of an electric equipment. It is a section schematic diagram (VV sectional view of Drawing 1) of an electric equipment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The present invention is a waterproof structure for an electric device having a housing formed by a device body and a sealing body that covers at least a part of the device body.

As shown in FIGS. 1 to 5, the electrical device X includes a housing Y having a device body 10 and a sealing body 20 that covers at least a part of the device body 10, and a side surface (sealing side surface) of the sealing body 20. ) 21 is provided with a discharge hole 25 for discharging water that has entered the inside of the housing Y to the outside of the housing Y.
Moreover, when it is set as the installation posture which installed the housing | casing Y of the electric equipment X perpendicularly, the electric equipment X is along the sealing side surface 21 at least under the discharge | emission hole 25 in the sealing side surface 21 of the sealing body 20, A curved portion 50 curved in a concave shape in cross-sectional view, and a discharge hole rib 25a formed over the discharge hole 25 so as to guide the water discharged from the discharge hole 25 to the lower side of the housing Y through the curved portion 50; .

  The electric device X may be any device as long as it is installed on the wall surface indoors or outdoors. As an electric equipment installed in the said wall surface, the alarm device for disaster prevention or crime prevention is mentioned, for example. The alarm device includes a detection unit 31 that detects a change in the external environment. The detection unit 31 may be any sensor that detects a change in the external environment, and as such a sensor, a gas sensor such as an oxygen sensor, a CO sensor, a city gas sensor, or an LP gas sensor, a fire sensor, and the like can be used. It is not limited to this.

The gas sensor may be in any form as long as it detects the gas to be detected. For example, an oxygen sensor can detect oxygen gas, a CO sensor can detect carbon monoxide gas generated by incomplete combustion, and a city gas sensor or LP gas sensor can detect a leak gas such as hydrocarbon gas. Known semiconductor sensor elements, catalytic combustion sensor elements, electrochemical sensor elements, and the like can be used.
As the fire sensor, a temperature sensor that senses an increase in temperature, a known scattered light smoke sensor having a smoke sensing function, or the like can be used.

  This embodiment demonstrates the aspect which installs the gas alarm device X which detects the leak of CO gas in the wall surface of a bathroom in order to detect incomplete combustion as an alarm device. The shape of the gas alarm device X is not particularly limited, but in the present embodiment, the gas alarm device X has a rectangular shape in a top view and exemplifies a thick plate shape (for example, 12 × 7 × 2.5 cm). . In this case, the gas alarm device X can be installed, for example, in a vertically installed posture (installation posture) in which the long side is installed vertically to the ground.

  The apparatus main body 10 accommodates the board | substrate part 30, and forms the bottom face 11 and the side surface 12 integrally. That is, the substrate unit 30 is accommodated in a space surrounded by the bottom surface 11 and the side surface 12. At the end of the side surface 12 (on the side of the sealing body 20), a main body peripheral edge portion 12 a that is disposed so as to overlap the sealing body 20 is formed. A groove B is formed along the periphery of the gas alarm device X at the peripheral edge 12a of the main body. In addition, a plurality of water stopping ribs 12b are formed on the peripheral edge 12a of the main body over the entire periphery, and the groove B is formed by a space between adjacent water stopping ribs 12b. Since the groove part B and the water stop rib 12b are provided in a direction substantially orthogonal to the water intrusion direction, the water that has entered the water stop rib 12b can be blocked. The blocked water can flow down the gas alarm device X along the groove B and be discharged to the outside.

  The sealing body 20 is a member that covers at least a part of the device main body 10. In the present embodiment, a case where the sealing body 20 covers the entire device main body 10 will be described.

  The sealing body 20 includes a speaker opening 24 that emits an alarm sound emitted from the speaker unit 32 to the outside, a detected gas inlet 26 that introduces a detected gas into the detection unit 31, and a switch that performs a switch operation. A pressing portion 27 is formed, and a light guide portion 28 and a battery 29 are disposed in a recess formed on the back surface of the sealing body 20.

  A discharge hole 25 for discharging water that has entered the inside of the housing Y to the outside of the housing Y is formed on the side surface of the sealing body 20. In the present embodiment, the discharge hole 25 is a hole for entering the inside of the housing Y, passing through the inner surface of the sealing body 20, and discharging the water reaching the discharge hole 25 to the outside of the housing Y.

  A sealing plate 40 is attached to the surface of the sealing body 20. The sealing plate 40 is formed with a speaker opening 44 and a detected gas inlet 46 corresponding to the speaker opening 24 and the detected gas inlet 26, respectively.

  Components such as a detection unit 31, a speaker unit 32, an LED 33, and a switch unit 34 are disposed on the substrate unit 30. This embodiment demonstrates the case where an electrochemical CO sensor is used as the detection part 31 which detects CO gas. An electrochemical CO sensor is a sensor that guides CO gas onto a working electrode having a catalytic action through a diaphragm and oxidizes the CO gas to output a voltage or current corresponding to the gas concentration. The speaker unit 32 may be in any form as long as it receives a signal from the detection unit 31 and emits an alarm sound. For example, a piezoelectric speaker can be used. The light emitted from the LED 33 is emitted to the outside through the light guide unit 28.

  The detection unit 31 is accommodated in the accommodation unit 22 that is erected from the sealing body 20 toward the inside of the housing Y. The shape of the storage unit 22 is not particularly limited as long as the electrochemical CO sensor as the detection unit 31 can be stored. In the present embodiment, a case of a rectangular shape is illustrated. The accommodating portion 22 is erected from the back surface of the sealing body 20, and the rectangular opening of the accommodating portion 22 is closed by the substrate portion 30.

  When the housing structure of the electrical device (gas alarm device) X of the present invention is in the installation posture in which the housing Y of the electrical device X is installed vertically, the gas alarm device X is at least on the sealing side surface 21 of the sealing body 20. A curved portion 50 that is curved in a concave shape in a cross-sectional view is provided along the sealing side surface 21 below the discharge hole 25 (FIGS. 3 to 5).

  This embodiment demonstrates the case where the curved part 50 is formed over the perimeter of the sealing side surface 21 of the sealing body 20. FIG. The bending portion 50 is bent in a concave shape toward the inside of the housing Y in a cross-sectional view. If the curved portion 50 is not a clear groove shape but a gentle curved portion, dust or the like hardly collects on the sealing side surface 21. Thus, by forming the curved portion 50 having a concave cross-sectional view along the sealing side surface 21, a passage-shaped recess can be formed along the sealing side surface 21.

  In this configuration, since the curved portion 50 is provided at least below the discharge hole 25 in the installation posture, the water discharged from the discharge hole 25 is transmitted through the passage-shaped curved portion 50 in the installation posture. , It becomes easier to guide the water below the housing Y. At this time, since the curved portion 50 is formed on the sealing side surface 21, the water discharged from the discharge hole 25 is directed toward the gap of the housing Y (for example, the gap between the device main body 10 and the sealing body 20). It becomes difficult to flow. Therefore, it becomes difficult for water discharged from the discharge hole 25 to enter the gas alarm device X again from the gap.

  Moreover, the housing structure of the gas alarm device X of the present invention is a discharge hole rib formed over the discharge hole 25 so as to guide the water discharged from the discharge hole 25 to the lower part of the housing Y through the curved portion 50. 25a. The discharge hole rib 25a may be provided in the vertical direction over the entire length of the vertical width of the discharge hole 25 in the installation posture, for example, but the water discharged from the discharge hole 25 passes through the bending portion 50. As long as it is arranged so as to be guided below the housing Y, the present invention is not limited to such a mode.

  Thus, by providing the discharge hole rib 25a over the discharge hole 25, it becomes easy to guide the water to be discharged from the discharge hole 25 to the curved portion 50 immediately, thereby reliably ensuring the water below the housing Y. Can lead.

  In this embodiment, the recessed part 60 is formed in the curved part 50 formed in the lower surface of the sealing body 20 in an installation attitude | position.

  By forming the recess 60 in the curved portion 50 formed on the lower surface of the sealing body 20 in this way, for example, when water discharged from the discharge hole 25 is guided below the housing Y, such water is recessed. It becomes easy to move along the edge part 60a of 60, and it becomes easy to form a water droplet in the said edge part 60a. And if it grows to the water droplet of a certain magnitude | size, it will dripped under the gas alarm X (FIG. 1). As described above, in this configuration, the water discharged from the discharge hole 25 is difficult to flow toward the gap of the housing Y (for example, the gap between the device main body 10 and the sealing body 20), and from the discharge hole 25. The discharged water can be efficiently dropped to prevent the water from re-entering the housing Y.

  INDUSTRIAL APPLICABILITY The present invention can be used for a housing structure provided with a drainage structure for discharging water that has entered the internal space of an electrical device to the outside of the electrical device in a disaster prevention or crime prevention electrical device installed on a wall surface.

X Electrical equipment Y Housing 10 Equipment body 20 Sealing body 21 Side surface (sealing side surface)
25 discharge hole 50 curved portion 25a discharge hole rib 60 recess

Claims (2)

A housing having a device body and a sealing body covering at least a part of the device body;
On the side surface of the sealing body, a discharge hole for discharging water that has entered the inside of the housing to the outside of the housing is provided,
When the installation posture in which the housing is installed vertically,
A curved portion curved in a concave shape in a sectional view along the side surface at least below the discharge hole on the side surface of the sealing body;
A housing structure for an electrical apparatus, comprising: a discharge hole rib formed over the discharge hole so that water discharged from the discharge hole is guided to the lower side of the housing through the curved portion.   The casing structure of the electric device according to claim 1, wherein the curved portion is formed on a lower surface of the sealing body in the installation posture, and a concave portion is formed in the curved portion.

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