JP5849866B2 - Water drainage structure for electrical equipment - Google Patents

Description

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

  One type of electrical equipment is an alarm device for disaster prevention or crime prevention installed on a wall surface. Such outdoor electrical equipment normally needs to maintain its function even when the alarm device is exposed to water. For example, water that drains water that has entered the alarm device is used. A punching structure is 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.
In the structure described in Patent Document 1, in order to further enhance the drainage effect of the drainage channel, for example, a drainage hole is formed in the lowermost end of the sealing body.

JP 2007-102555 A

  Even when a drainage channel or drainage hole is provided as in the waterproof structure described in Patent Document 1, water may not easily escape from the drainage channel or drainage hole due to the surface tension of water. .

  Accordingly, an object of the present invention is to provide a drainage structure for an electrical device with improved drainage performance.

  In order to achieve the above object, a drainage structure for an electrical device according to the present invention is a drainage structure for an electrical device having a device body and a sealing body covering at least a part of the device body. When the sealing body is assembled to the device body, the peripheral edge portion of the main body of the device body and the sealing edge portion of the sealing body overlap, respectively, and at least the peripheral edge portion of the main body and the sealing edge portion In any one of the above, the at least one groove portion is formed in the electric device along the peripheral edge of the electric device, and the drainage portion capable of discharging the water that has entered the electric device at the peripheral edge of the electric device. And a part thereof is formed with a protrusion extending over the drainage portion.

  According to this configuration, when the electrical device is arranged so that the peripheral edge where the drainage portion is formed faces downward, the water that has entered the interior of the electrical device can be discharged from the drainage portion by gravity. That is, since the groove portion is provided in a direction substantially perpendicular to the water intrusion direction, the water that has entered the inside of the electric device is blocked by the groove portion, and flows down the electric device through the groove portion. It reaches the drainage part and can be discharged outside.

  The protruding portion is arranged so that a part thereof extends to the drainage portion. When the electrical equipment is arranged so that the tip of the protrusion formed on the periphery protrudes downward, when the water that has reached the drainage further reaches the protrusion, the water is led to the tip of the protrusion by its own weight. It becomes easy. This makes it easier for water droplets to be formed at the tip of the protrusion, and when the water droplets grow to a certain size, they drop below the electrical device. Thus, in this structure, it becomes easy to discharge | emit the water which infiltrated the inside of an electric equipment outside efficiently.

  The 2nd characteristic structure of the drainage structure of the electric equipment which concerns on this invention exists in the point which made the said drainage part the clearance gap when the said main body peripheral edge part and the said sealing edge part are each arrange | positioned.

  The gap in this configuration communicates with a groove formed at the peripheral edge of the main body or the sealing edge. Therefore, according to this structure, since the clearance gap formed when a sealing body is assembled | attached to an apparatus main body can be used as a drainage part, a drainage part can be formed easily.

  Moreover, since the said clearance gap can be formed over the length of a long side, and the length of a short side, a drain part can be formed long. Thereby, the area | region which can discharge | release the water which permeated the inside of an electric equipment can be ensured over the periphery of an electric equipment. Such a gap is usually formed in an elongated line shape. In this case, the water that has reached the drainage portion is likely to move through the gap due to capillary action. That is, the water that has reached the drainage portion is likely to reach the protrusion due to the capillary phenomenon, and the water is easily discharged to the outside quickly.

  A third characteristic configuration of the drainage structure for an electrical device according to the present invention is that the electrical device is rectangular in a top view, and the drainage portion and the protrusion are formed on both the short side and the long side. In the point.

According to this configuration, for example, when the electric device is placed vertically, the short side is the lower surface. Therefore, when the drainage part and the projection part are formed on the short side, it is easy to discharge water when the electric device is placed vertically.
On the other hand, when the electric device is placed horizontally, the long side is the lower surface. Therefore, when the drainage part and the projection part are formed on the long sides, it is easy to discharge water when the electric device is placed horizontally.

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 disassembled perspective view of an electric equipment. It is sectional drawing of an electric equipment. It is the schematic of an apparatus main body. It is a principal part perspective view of a water draining structure. It is principal part sectional drawing of a drainage structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The present invention is a drain structure for an electrical device having a device body and a sealing body covering at least a part of the device body.
As shown in FIGS. 1 to 7, when the sealing body 20 is assembled to the device main body 10, the water draining structure of the electric device X seals the main body peripheral edge 12 a of the device main body 10 and the sealing body 20. At least one groove B is formed inside the electric device X so as to follow the peripheral edge A of the electric device X in at least one of the main body peripheral end portion 12a and the sealing end portion 21. It is. On the peripheral edge A of the electric device X, a drainage portion C capable of discharging the water that has entered the electric device X is formed, and a protrusion D is formed so that a part thereof extends over the drainage portion C.

  The electric device X may be any device as long as it is installed on the wall surface. As an electric equipment installed in the said wall surface, the alarm device for disaster prevention or crime prevention is mentioned, for example. This embodiment demonstrates the aspect which installs the gas alarm which detects the leak of combustible gas (LP gas) as the electric equipment X on the indoor wall surface. The shape of the electric device X is not particularly limited, but in the present embodiment, a rectangular shape in a top view and a thick plate shape (for example, 12 × 7 × 2.5 cm) is illustrated. In this case, the electric device X can be installed in a vertically installed posture in which its long side is installed perpendicular to the ground, or in a horizontally installed posture in which its short side is installed perpendicular to the ground.

  The device body 10 accommodates the circuit board 30 and is configured by integrally forming the bottom surface 11 and the side surface 12. That is, the circuit board 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. In the present embodiment, when the sealing body 20 is assembled to the device main body 10, when the main body peripheral edge 12 a and the sealing end 21 are overlaid, the main peripheral edge 12 a is positioned inside. explain.

  Moreover, this embodiment demonstrates the case where the groove part B is formed in the main body peripheral edge part 12a so that the peripheral edge A of the electric equipment X may be followed. In this case, when the sealing end portion 21 and the main body peripheral edge portion 12a are overlapped, the sealing end portion 21 covers the groove B formed in the main body peripheral edge portion 12a.

  A plurality of water blocking ribs 12b are formed on the peripheral edge 12a of the main body over the entire circumference, and the groove B is formed by a space between adjacent water blocking ribs 12b. At least one groove B may be formed. In the present embodiment, for example, in the posture when the electric device X is placed vertically, one groove B is formed on the lower half circumference of the main body peripheral edge 12a, and two grooves B are formed on the remaining upper half circumference. They are configured to be arranged side by side (FIG. 5). At this time, these two groove parts B merge by the merge groove B1. The merging groove B1 is configured such that one groove part B (on the sealing body 20 side) joins the other groove part B in an obliquely downward direction in the posture when the electric device X is placed vertically. Thereby, the water that has flowed down through one groove B can flow down through the other groove B.

  The sealing body 20 is a member that covers at least a part of the device main body 10. In this embodiment, the sealing body 20 has the 1st sealing body 20a which covers the whole apparatus main body 10, and the 2nd sealing body 20b which covers the opening part 22 of the 1st sealing body 20a.

  Further, the first sealing body 20a is formed with a switch opening 23 for exposing the switch 40 and a speaker opening 24 for transmitting an alarm sound to the outside. In the present embodiment, the portion of the switch 40 exposed from the switch opening 23 (operation unit 41) is an oval shape, for example, a rounded rectangle (consisting of two equal-length parallel lines and two semicircles). The switch opening 23 is shaped like a rounded rectangle so as to correspond to the exposed portion.

  An inclined surface 25 is formed at the corner of the first sealing body 20a where the switch opening 23 is provided so that the thickness of the first sealing body 20a gradually decreases toward the corner. . In the present embodiment, the inclined surface 25 is configured to be inclined from a position about half of the switch opening 23.

  On the side surface of the first sealing body 20a, a detected gas introduction port 26 for introducing the detected gas into the gas detection unit 31 is provided. Moreover, the holding part 27 which hold | maintains the switch 40 is provided in the inside (back surface) of the 1st sealing body 20a, Furthermore, the positioning projection part which determines the distance of the apparatus main body 10 and the 1st sealing body 20a 28 is provided.

  Components such as a gas detection unit 31, a notification unit 32, and a terminal block 33 are disposed on the circuit board 30, for example. A power cord 34 is connected to the circuit board 30.

  The gas detector 31 may be in any form as long as it detects a combustible gas (LP gas) that is a gas to be detected. For example, a known semiconductor sensor element or a contact combustion sensor element may be used. The provided one can be used.

  The notification unit 32 may be in any form as long as it issues a warning in response to a signal from the gas detection unit 31. For example, a piezoelectric speaker or the like can be used.

  The terminal block 33 may be in any form that can connect a connection terminal from the outside, and is disposed on the circuit board 30 so as to be exposed from the opening 22 of the first sealing body 20a. When connecting an external connection terminal to the terminal block 33, for example, the second sealing body 20 b covering the opening 22 may be slid downward to expose the terminal block 33.

  In the present invention, the drainage portion C that can discharge the water that has entered the inside of the electric device X is formed at the peripheral edge A of the electric device X. Further, a protrusion D is formed on the peripheral edge A. The protrusion D is arranged so that a part thereof extends to the drainage part C. If the protrusion D is disposed so that a part thereof extends over the drainage part C, it can take various shapes such as a rod shape, a rectangular shape, and a cylindrical shape.

  In this configuration, when the electric device X is arranged so that the peripheral edge A where the drainage portion C is formed faces downward, the water that has entered the electric device X can be discharged from the drainage portion C by gravity. That is, since the groove part B and the water stop rib 12b are provided in the direction substantially orthogonal to the water intrusion direction, the water that has entered the water stop rib 12b can be blocked. Even if water enters the internal space side of the electric device X beyond the first water stop rib 12b, it can be blocked by the next water stop rib 12b. The dammed water flows down the electric device X along the groove B, reaches the water drain C, and can be discharged to the outside. The protruding portion D is disposed so that a part thereof extends to the drainage portion C. When the electric device X is arranged so that the tip of the protrusion D formed on the peripheral edge A protrudes downward, when the water that has reached the drainage part C further reaches the protrusion D, the water is protruded by its own weight. It becomes easy to be guided to the tip of the. This makes it easier for water droplets to be formed at the tip of the projection D, and when the droplets grow to a certain size, they drop below the electrical device X. Thus, in this structure, it becomes easy to discharge | emit the water which entered the inside of the electric equipment X efficiently outside.

  In the present embodiment, the drainage portion C is a gap when the main body peripheral edge portion 12a and the sealing end portion 21 are arranged in an overlapping manner, and the rod-like protrusion D is formed in the space of the drainage portion C formed by the gap. The end portion is configured to enter. In the present embodiment, a positioning projection 28 that determines the distance between the device main body 10 and the first sealing body 20a is provided so that such a gap can be reliably formed.

  Such a gap communicates with a groove B formed in the main body peripheral edge 12a. Therefore, according to this structure, since the clearance gap formed when the sealing body 20 is assembled | attached to the apparatus main body 10 can be made into the drainage part C, the drainage part C can be formed easily.

  Moreover, since the said clearance gap can be formed over the length of a long side, and the length of a short side, the drain part C can be formed long. Thereby, the area | region which can discharge | release the water which permeated the inside of the electric equipment X is securable over the periphery of the electric equipment X. Such a gap is usually formed in an elongated line shape. In this case, the water that has reached the drainage portion C is likely to move through the gap due to capillary action. That is, the water that has reached the drainage portion C is likely to reach the projection D due to capillary action, and the water can be easily discharged to the outside quickly.

The drainage part C and the protrusion part D may be formed on either one of the short side a1 and the long side a2, or may be formed on both.
For example, when the electric device X is placed vertically, the short side a1 is the lower surface. Therefore, when the drainage part C and the protrusion part D are formed in the short side a1, when the electric equipment X is placed vertically, it becomes easy to discharge water.
On the other hand, when the electric device X is placed horizontally, the long side a2 becomes the lower surface. Therefore, when the drainage part C and the protrusion part D are formed in the long side a2, it becomes easy to discharge | emit water when the electric equipment X is placed horizontally.
The number of protrusions D formed on each side is not particularly limited. In the present embodiment, a case where two protrusions D are provided on each side is shown.

[Another embodiment]
In the embodiment described above, the case where the groove portion B is formed in the main body peripheral edge portion 12a has been described. However, the present invention is not limited thereto, and the groove portion B may be formed on the sealing end portion 21 side.

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

X Electrical equipment A Peripheral a1 Short side a2 Long side B Groove C Drain part D Projection 10 Equipment body 12a Body peripheral edge 20 Sealing body 21 Sealing edge

Claims (3)

In the drainage structure of the electrical apparatus having a sealing body covering at least a part of the apparatus body and the apparatus body
When the sealing body is assembled to the device body, the peripheral edge of the body of the device body and the sealing edge of the sealing body overlap,
At least one groove portion is formed inside the electric device along the peripheral edge of the electric device in at least one of the main body peripheral edge and the sealing end,
A drainage structure for an electrical device, wherein a drainage portion capable of discharging water entering the interior of the electrical device is formed at a peripheral edge of the electrical device, and a part of the drainage portion is formed with a protrusion extending over the drainage portion.   The drainage structure for an electric device according to claim 1, wherein the drainage portion is a gap when the peripheral edge portion of the main body and the sealing end portion are arranged in an overlapping manner.   The drainage structure for an electrical device according to claim 1 or 2, wherein the electrical device is rectangular in a top view, and the drainage portion and the protrusion are formed on both the short side and the long side.

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