JP6443307B2 - Drainage structure and power control device - Google Patents

Description

  The present invention relates to a drainage structure for an electronic device casing and a power control apparatus using the drainage structure.

  In a photovoltaic power generation system, DC power from solar cells, storage batteries, etc. is converted into AC power of commercial frequency linked to the system, and the converted AC power is applied to household loads connected to the commercial power system. Electronic equipment such as power conditioners to be supplied may be installed outdoors. When electronic devices are installed outdoors in this way, wiring for transmitting and receiving electric power and electrical signals will be arranged between outdoor electronic devices and indoor devices, but many wirings are cluttered. If it is provided, the aesthetic appearance is impaired. For example, so-called concealed wiring is performed in which the wirings are collectively accommodated in a duct and are drawn indoors through the duct.

  In addition, when wiring is performed through a duct, measures against flooding are taken so that rainwater does not enter the outdoor electronic device or indoors from a connecting portion of the duct or the like.

  In Patent Document 1, in a power storage box that stores a power source of an electronic device operation panel, drainage that is inclined in a valley shape around a drainage hole so as to receive moisture penetrating from a joint portion with the electronic device operation panel. A power storage box is disclosed in which a rib is provided and water that has entered the junction with the electronic device operation panel is guided to a drain hole by a drain rib and drained reliably.

  In Patent Document 2, a keyboard that can be used to input data is provided on the surface of a device, and a small electronic device that can be held on the palm of one hand is provided with a cover that holds the keyboard. A small electronic device configured to be held by the above is disclosed. With this configuration, the small electronic device aims to reduce the cost and improve the workability by omitting the screwing space and work for attaching the cover.

JP 2010-98898 A Japanese Patent Laid-Open No. 07-183668

  When the wiring is accommodated in the duct so that the wiring of the electronic device is not exposed, since the sealing portion is required so that rainwater or the like does not enter the lid that closes the opening of the duct. Was screwed at multiple locations.

  However, in order to screw a plurality of places, a screw, a hole through which the screw is passed, a female screw part or a nut for receiving the screw are provided at each place, and a space and a member for this purpose are required. There is a problem in that the size of the equipment is increased and the number of parts is increased.

  In addition, there is a problem that workability is low because screwing work must be performed for each of a plurality of locations.

Accordingly, an object of the present invention is to provide a technique that enables space saving and labor saving while ensuring waterproofness of a casing for an electronic device.

  In order to solve the above problems, the present invention has a flange portion of a housing having a hole that penetrates the flange portion and a claw portion that holds the lid portion, and the lid portion is engaged with the claw portion. The opening of the housing can be easily closed, and the drain reaches the flange by providing a drain hole in the lid that communicates with the hole in the flange with the lid closed. The greatest feature is that water can be drained through the hole and the drain hole.

More specifically, a drainage structure for a housing for an electronic device comprising a housing having an opening and a lid that closes the opening,
The casing has a flange that contacts the lid on the periphery of the opening,
The flange portion has a hole penetrating from the surface that contacts the lid portion to the opposite surface, and a claw portion that holds the lid portion between the flange portion,
The lid portion is held between the claw portion and the flange portion, and has a drainage portion communicating with a hole of the flange portion in a state where the opening portion is closed.

  That is, according to the present invention, since the hole of the flange portion and the drainage portion communicate with each other with the lid portion closed, the water reaching the flange portion can be drained through the hole and the drainage portion. In order to prevent water from entering the inside of the housing from the contact portion between the flange portion and the lid portion to ensure waterproofness, the lid portion can be easily held by the claw portion, and the screw The space and work for fixing with can be omitted.

  In the present invention, the hole of the housing part may be a cut-off hole when the claw part is formed in the injection molding of the housing part. Thereby, the cut hole can be used as a drainage route, and waterproofness can be secured with a simple configuration.

  In the present invention, the flange portion has at least one protrusion on the surface that contacts the lid, and the protrusion is formed on the surface that contacts the flange. You may have a groove part to which a strip part fits. Thereby, when the said cover part is closed, the said protruding item | line part and a groove part fit, and the penetration | invasion of the water into the said housing | casing part can be prevented.

  In the present invention, the flange portion has at least one groove portion along a peripheral edge on a surface contacting the lid portion, and the lid portion fits the groove portion on a surface contacting the flange portion. You may have a convex part to match. Thereby, when the lid portion is closed, the water intrusion path is blocked by the fitting of the ridge portion and the groove portion, thereby preventing water from entering the housing portion.

  In this invention, the said drain part may be provided in the position used as the outer side of the said protruding item | line part in the state which the said cover part closed the said opening part. Thereby, water can be discharged | emitted reliably on the outer side of a protruding item | line part, and it has prevented that water penetrate | invades into the inner side of a protruding item | line part along the clearance gap between a protruding item | line part and a groove part.

  Further, the present invention for solving the above-mentioned problem is a power control device for controlling the generated power generated in the power generation unit that generates power using the discharge power from the power storage means or renewable energy, You may provide the said drainage structure in the housing | casing which accommodates the wiring which concerns on control. As a result, when the wiring of the power control device is accommodated in a casing such as a duct and concealed, the space can be saved and the labor can be saved while securing the waterproof property as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which enables space saving and labor saving can be provided, ensuring the waterproofness of the housing | casing for electronic devices.

FIG. 1 is a longitudinal sectional view of a power control apparatus according to the present embodiment. FIG. 2 is an exploded perspective view of the power control apparatus according to the present embodiment. FIG. 3 is a perspective view of the lid. FIG. 4 is a perspective view when the casing is viewed obliquely from below. FIG. 5 is a perspective view when the casing is viewed obliquely from above. FIG. 6 is a perspective view when the casing and the lid are viewed obliquely from above. FIG. 7 is a perspective view when the casing and the lid are viewed obliquely from below. FIG. 8 is a cross-sectional view of a portion where the claw portion of the flange portion is provided. FIG. 9 is a cross-sectional view of the flange portion with the claw portion and the end portion of the lid portion. FIG. 10 is a cross-sectional view showing a first modification of the portion provided with the claw portion of the flange portion and the end portion of the lid portion. FIG. 11 is a cross-sectional view showing a modified example 2 of a portion where the claw portion of the flange portion is provided and an end portion of the lid portion. FIG. 12 is a diagram illustrating an example in which the drainage portion is a notch portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment.

  1 is a longitudinal sectional view of a power control apparatus 10 according to the present embodiment, FIG. 2 is an exploded perspective view of the power control apparatus 10 according to the present embodiment, FIG. 3 is a perspective view of a lid portion 30, and FIG. FIG. 5 is a perspective view when the casing is viewed obliquely from above. FIG. 6 is a perspective view when the casing and the lid are viewed obliquely from above. FIG. 7 is a perspective view of the housing and the lid when viewed obliquely from below, FIG. 8 is a cross-sectional view of the portion provided with the claw portion of the flange portion, and FIG. 9 is a claw of the flange portion. It is sectional drawing of the part which provided the part, and the edge part of a cover part. Hereinafter, unless otherwise specified, the outer wall 41 side (mounting surface side) of the power control device 10 is defined as “rear side”, the opposite side is defined as “front side”, and the rear side is defined. The right side toward the front of the power control apparatus 10 is defined as “right” and the opposite side is defined as “left”, which is orthogonal to the direction toward the front side. Further, the top plate 15 side of the power control device 10 is defined as “upper”, and the bottom plate 16 side is defined as “lower”.

  The power control device 10 converts DC power from a solar battery, a storage battery, or the like into AC power having a commercial frequency linked to the system, and converts the converted AC power to a household load connected to the commercial power system. This is a supply device, and is installed on the outer wall 41 of the building, that is, outdoors.

  The power control apparatus 10 includes a main body 1 containing an electronic circuit, a heat sink 12 provided on the rear surface of the main body, a mounting plate 13 for fixing the main body 1 to an attachment surface (in this example, the outer wall 41), a main body 1 A duct 230 that accommodates the wiring 14 drawn into the outer wall 41 from the outside is provided.

  The main body 1 of the power control apparatus 10 includes a first case 100 and a front cover 18 as a casing. The first case 100 has a bowl shape composed of a top plate 15, a bottom plate 16, left and right side plates 19, and a back plate 17, and an opening is formed on the front side. The front cover 18 is disposed so as to cover the opening of the first case 100. The first case 100 accommodates therein an electronic circuit or an electric circuit (hereinafter also simply referred to as a circuit) composed of electronic components such as a semiconductor element, an inductor, and a rectifying element. FIG. 1 shows an example in which an electronic component is mounted and a substrate 11 on which a circuit is formed is installed on a back plate 17, and other electronic components and circuits are omitted for convenience.

A heat sink 12 is connected to the back of the main body 1 via a heat conduction sheet (not shown). The heat sink 12 functions as a heat radiating member that releases heat generated from a heat source such as an electronic component or an electronic circuit housed in the main body 1 to the outside. For this reason, the heat sink 12 is formed of a material having high thermal conductivity, and is formed of, for example, aluminum, iron, copper, or the like. The heat sink 12 of this example is made of aluminum.

  Further, a mounting plate 13 is provided behind the heat sink 12. Since the attachment plate 13 is screwed to the outer wall 41 and the main body 1 is attached to the attachment plate 13, the main body 1 is fixedly held to the outer wall 41. Further, as shown in FIG. 2, the attachment plate 13 is formed so as to cut out the lower right corner, and the duct 230 is attached to the lower right corner.

  As described above, since the power control device 10 is provided with the heat sink 12 on the back of the main body 1, the main body 1 and the outer wall 41 are separated from each other, and the wiring 14 connected to the circuit of the main body 1 is connected to the duct 230. It is drawn into the outer wall 41 via the, and is arranged so as not to be exposed to the outside.

  The duct 230 includes a housing unit 20 that accommodates wiring and a lid unit 30 that closes an opening 51 (FIG. 4) of the housing unit 20. The housing portion 20 has a flange portion 24 that contacts the lid portion 30 at the periphery of the opening portion 51. The flange portion 24 has a hole 242 that penetrates from the surface that contacts the lid portion 30 to the opposite surface, and a flange. And a claw portion 241 that sandwiches the lid portion 30 with the portion 24.

  The housing 20 has a space in which the left and right side plates 26, the upper plate 28, the front plate 29, and the front end plate 22 are integrally formed and the wiring 14 is accommodated therein. When the casing 20 is viewed from the left side, the longitudinal section is L-shaped, the lower portion of the casing 20 extends forward from the front plate 29, and the front end plate 22 is provided at the front end.

  The front end plate 22 is provided with a first wiring port 21 and is attached in communication with a main body side wiring port provided at a lower portion of the back plate 17 of the main body 1. A packing (not shown) is sandwiched between the back plate 17 of the main body 1 and the front end plate 22 of the duct 230 so as to surround the wiring port, and the main body 1 and the duct 230 are connected in a watertight manner.

  Further, the rear end of the housing part 20, that is, the rear ends of the left and right side plates 26 and the upper plate 28, has a flange portion 27 formed in parallel with the mounting surface (outer wall 41). The opening on the inner side of the flange portion is a second wiring port 201 and is attached in communication with the wall side wiring port 42 provided in the outer wall 41. A gasket (not shown) is sandwiched between the flange portion 27 and the outer wall 41 so as to surround the wiring port, and the duct 230 and the outer wall are connected in a watertight manner.

  A flange portion 24 is provided at the lower ends of the left and right side plates 26 in the housing portion 20 so as to protrude outward from the side plates 26. Further, a plurality of plate-like ribs 23 extending in the vertical direction are provided in parallel between the flange portion 24 and the side plate 26 for reinforcement. Further, a claw portion 241 that holds the lid portion 30 in a closed state is provided at the center in the front-rear direction of the right flange portion 24. In this example, one claw portion 241 is provided at the center of the flange portion 24. However, the present invention is not limited to this, and a plurality of claw portions 241 may be provided other than the center of the flange portion 24.

  As shown in FIG. 8, the claw portion 241 has a lid between the abutting surface 249 and a descending portion 245 extending downward, that is, in a direction away from the abutting surface 249 of the flange portion 24 with the lid portion 30. The engaging projection 246 is formed to protrude inward with a distance corresponding to the portion 30.

  A hole 242 is provided above the engaging convex portion 246, and a convex strip portion 243 that protrudes downward from the contact surface 249 to the inner side of the inner surface 247 of the hole 242, that is, to the opening 51 side. Is provided. In the present embodiment, an example in which one ridge portion 243 is provided along the periphery of the opening 51 is shown, but the present invention is not limited thereto, and a plurality of ridge portions 243 may be provided.

  Further, as shown in FIG. 3, the lid portion 30 is a substantially flat member, and at least one end is held between the claw portion 241 and the contact surface 249 of the flange portion 24, and the opening portion 51 of the duct 230. It is attached in the state where it was closed. And the cover part 30 has the drain hole 32 connected with the hole 242 of the flange part 24 in the state which block | closed the opening part 51. FIG. The drain hole 32 is one form of a drain part. Further, the lid portion 30 has a groove portion 33 into which the protruding portion 243 of the flange portion 24 is fitted when the opening 51 is closed, and the drainage hole 32 is fitted to the protruding portion 243 in the groove portion 33. It is provided outside the position where

  A screwing portion 35 for attaching and fixing the lid portion 30 to the housing portion 20 at the end portion of the lid portion 30 opposite to the end portion provided with the drain hole 32, that is, the right end portion in this example. And a hole 34 through which a screw is passed is provided inside the screwing portion 35. On the other hand, a cylindrical screw receiving portion 244 is provided at a position where the housing portion 20 is joined to the screw fastening portion 35, in this example, at the center in the front-rear direction of the right flange portion 24.

  Then, as shown in FIG. 7, the end of the lid portion 30 on the side where the drainage hole 32 is provided is inserted between the engagement convex portion 246 of the claw portion 241 and the contact surface 249 in the housing portion 20. Then, the lid 30 is closed to close the opening 51 so that the screwing portion 35 at the other end is aligned with the screw receiving portion 244 of the housing portion 20, and the female screw portion 240 is screwed through the hole 34 of the screwing portion 35. (Not shown) is inserted, and the lid 30 is screwed to the housing 20.

  In this way, when the lid portion 30 is closed (the opening portion 51 is closed), the hole 242 of the flange portion 24 and the drainage hole 32 of the lid portion 30 communicate with each other as shown in FIG. As shown by the arrow 52, the water that has reached the upper surface of the flange portion 24 through the side plate 26 is drained through the hole 242 and the drain hole 32 as shown by the arrow 53. No stagnation on the portion 24, and adverse effects such as intrusion of the water into the duct 230 and the main body 1 are prevented. That is, the waterproof property of the power control device 10 is kept good. In the present embodiment, the duct 230 is a form of the drainage structure of the electronic device casing.

  When the casing 20 is molded by filling a mold (in this example, a mold) with a material such as synthetic resin, a mold in which the casing 20 is divided in the vertical direction is used, and the engagement of the claw 241 is performed. A punching hole for pulling out the upper mold forming the mating convex part 246, that is, a cut-off hole, may be used as the hole 242 of the flange part 24. Accordingly, a cut-off hole for forming the claw portion 241 can also be used as a drainage path, so that it is not necessary to provide the hole 242 separately from the claw portion 241 and the drainage structure of the present embodiment can be realized with a simple configuration. , Space can be saved.

  In this case, for example, as shown in FIG. 9, the length of the hole 242 is not the same as the length of the engaging convex portion 246 in the protruding direction of the engaging convex portion 246, that is, in the left-right direction in this example. It is desirable that the length includes a portion communicating with 32. In the example of FIG. 9, the length of the hole 242 is obtained by adding the length α of the drain hole 32 to the length of the engaging convex portion 246. Furthermore, since at least one end portion of the lid portion 30 is held by the claw portion 241, the number of places that must be screwed is reduced, and labor saving can be achieved.

  Further, in the present embodiment, the flange portion 24 has a protrusion 243 along the periphery of the opening 51 on the contact surface 249 with the lid portion 30, and the lid portion 30 abuts on the flange portion 24. The surface has a groove portion 33 into which the protruding portion 243 is fitted. Thereby, when the lid portion 30 is closed, the water intrusion path is blocked by the fitting of the ridge portion 243 and the groove portion 33, and the water intrusion into the housing portion can be prevented.

Furthermore, in this embodiment, since the drain hole 32 is provided on the outer side of the ridge portion 243, water can be reliably discharged outside the ridge portion 243. For example, the protrusion 243 and the groove portion 33 It is possible to prevent water from entering the inside of the ridge portion 243 through the gap.

  In the present embodiment, since the drain hole 32 is provided in the groove portion 33, the water that has entered the groove portion 33 can be discharged, and water does not accumulate in the groove portion 33. Water can be prevented from entering 230. The bottom surface 331 of the groove 33 is lowered toward the drain hole 32 so that water entering the groove 33 is easily drained from the drain hole 32, that is, a bottom surface 331 is formed with a downward slope. Also good.

<Modification 1>
In the above-described embodiment, the example in which the convex portion 243 is provided in the flange portion 24 and the groove portion (concave portion) 33 is provided in the lid portion 30 is shown. . FIG. 10 is a cross-sectional view showing Modification Example 1 of a portion where the claw portion 241 of the flange portion 24 is provided and an end portion of the lid portion 30.

  As shown in FIG. 10, in the first modification, the groove portion 248 is provided on the contact surface 249 of the flange portion 24, and the convex strip portion 36 that is fitted to the groove portion 248 is provided on the lid portion 30. 10 shows only the cross section of the groove 248 and the ridge 36, the groove 248 and the ridge 36 are formed along the periphery of the opening 51, as in FIGS. 3 and 4. ing. Further, in the present modification, the configuration other than the uneven shape is the same as that of the above-described embodiment. Thereby, when the cover part 30 is closed, the water intrusion path can be closed by fitting the ridge part 36 and the groove part 248, and the water intrusion into the housing part can be prevented.

  In addition, although the example which provided one groove part 248 along the periphery of the opening part 51 was shown in this modification 1, it is not restricted to this, You may provide two or more groove parts 248.

<Modification 2>
The concave and convex shapes at the end portions of the flange portion 24 and the lid portion 30 may be used by combining the shapes of the above-described embodiment and the first modification. FIG. 11 is a cross-sectional view showing Modification Example 2 of the portion where the claw portion 241 of the flange portion 24 is provided and the end portion of the lid portion 30.

  As shown in FIG. 11, in the second modification, a plurality of protruding ridges 243 are provided on the flange portion 24, and the groove portions 248 are provided between the flange portions 24, and a plurality of groove portions 33 are provided on the lid portion 30. Yes. Other configurations are the same as those in the above-described embodiment.

  As a result, when the lid 30 is closed, the water intrusion path is blocked by a plurality of fittings such as the ridge 36 and the groove 248, and the ridge 243 and the groove 33, so that the water can be more reliably entered into the housing. Can be prevented.

<Others>
In the above embodiment, the example of the power control device is shown as the electronic device. However, the present invention is not limited to this, and the device has a circuit built in the housing, and needs to prevent water from entering the housing. Any device can be used. For example, a smart meter installed outdoors or a charging device for an electric vehicle may be used.
Moreover, the installation location of the electronic device is not limited to the outdoors, but may be indoors where water is applied, such as in a bathroom or around the water.

Furthermore, in the above-described example, as illustrated in FIG. 7, the example in which the screwing portion 35 and the screw receiving portion 244 function as a fixing portion that fixes the lid portion 30 and the housing portion 20 is illustrated. The fixing portion between 30 and the housing portion 20 is not limited to this, and may be fixed by other configurations such as a snap fit or a clip that sandwiches the lid portion 30 and the flange portion 24. For example, the lid 30 or the claw 2
When 41 is flexible, both ends (right and left ends in this example) of the lid portion 30 may be held by the claw portions 241.
Further, in the above-described example, the example in which the drainage portion is the hole 32 penetrating the lid portion 30 in the vertical direction is shown, but the drainage portion is not limited to this, and the drainage portion communicates with the hole 242 of the flange portion 24. Any structure that can discharge water is acceptable. For example, FIG. 12 is a diagram illustrating an example in which the drainage portion is a notch portion 32A. Other configurations are the same as in the above example. As shown in FIG. 12, when the lid portion 30 is closed, a position communicating with the hole 242 of the flange portion 24 is notched and a notch portion 32 </ b> A is provided, so that water entering the hole 242 of the flange portion 24 is provided. However, since the water such as rain does not stagnate on the flange portion 24 as in the above-described example, the water does not enter the duct 230 or the main body 1. Adverse effects are prevented. That is, the waterproof property of the power control device 10 is kept good.

DESCRIPTION OF SYMBOLS 10 Power control apparatus 11 Board | substrate 12 Heat sink 13 Mounting plate 14 Wiring 20 Case part 22 Front end plate 23 Rib 24 Flange part 26 Side plate 27 Flange part 28 Upper plate 29 Front plate 30 Cover part 32 Hole 33 Groove part 36 Projection part 41 Outer wall 51 Opening portion 230 Duct 240 Female thread portion 241 Claw portion 242 Hole 243 Protruding strip portion 244 Screw receiving portion 245 Lowering portion 246 Engaging convex portion 248 Groove portion

Claims (6)

A housing having an opening, and a lid that closes the opening,
The casing has a flange that contacts the lid on the periphery of the opening,
The flange portion has a hole penetrating from the surface that contacts the lid portion to the opposite surface, and a claw portion that holds the lid portion between the flange portion,
The lid portion is held between the claw portion and the flange portion, and has a drainage portion communicating with the hole of the flange portion in a state where the opening portion is closed.
Drainage structure for electronic equipment casing.   The drainage structure according to claim 1, wherein the hole of the housing part is a cut-off hole when the claw part is formed in the injection molding of the housing part. The flange portion has at least one or more ridges along the periphery of the opening on the surface in contact with the lid portion,
The drainage structure according to claim 1 or 2, wherein the lid portion has a groove portion into which the convex strip portion is fitted on a surface that comes into contact with the flange portion. The flange portion has at least one groove portion along a peripheral edge of the opening portion on a surface in contact with the lid portion.
The drainage structure according to any one of claims 1 to 3, wherein the lid portion has a protruding portion that fits into the groove portion on a surface that contacts the flange portion.   5. The drainage structure according to claim 3, wherein the drainage portion is provided at a position on the outer side of the protruding strip portion in a state where the lid portion closes the opening. A power control device for controlling generated power generated in a power generation unit that generates electric power by using discharge power from a power storage means or renewable energy,
The electric power control apparatus provided with the drainage structure as described in any one of the said Claims 1-5 in the housing | casing which accommodates the wiring which concerns on the said control.

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