JP2016192848A - Distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution board capable of improving the communication quality between a communication module and outside units.SOLUTION: A distribution board 1 includes: a housing 2; a communication module 5; a first antenna 61; and a second antenna 62. The housing 2 stores plural breakers 30. The communication module 5 is stored in the housing 2 to communicate with outside units disposed outside of housing 2. The first antenna 61 and the second antenna 62 transmit and receive a radio signal. The first antenna 61 is provided to the communication module 5, and the second antenna 62 is attached to a part separated from the first antenna 61 in the housing 2.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a distribution board, and more particularly to a distribution board including a communication module that communicates with an external device.

  2. Description of the Related Art Conventionally, there is a distribution board that is used in a HEMS (Home Energy Management System) and includes a wireless communication device (communication module) that transmits a measurement result of power consumption to an external device (for example, see Patent Document 1). In this type of distribution board, the communication module performs wireless communication with an external device using an antenna.

JP 2013-106322 A

  However, depending on the installation location of the antenna in the distribution board, there is a possibility that the communication quality cannot be ensured. For example, when a circuit breaker that uses a lot of metal material is placed between the antenna and the external device, or when the antenna is installed on the wall side of the building, the communication quality between the communication module and the external device There was a risk of lowering.

  This invention is made | formed in view of the said reason, The objective is to provide the distribution board which can ensure the communication quality of a communication module and an external apparatus.

  A distribution board according to the present invention includes a housing that houses a plurality of breakers, a communication module that is housed in the housing and communicates with an external device provided outside the housing, and a first that transmits and receives radio signals. An antenna and a second antenna, wherein the first antenna is provided attached to the communication module, and the second antenna is attached to a portion of the housing away from the first antenna. To do.

  The present invention has an effect that communication quality between the communication module and the external device can be ensured.

It is a front view which shows schematic structure of the state which removed the inner cover and the outer cover in the distribution board of embodiment. It is a front view which shows schematic structure of the state which attached the inner cover in the electricity distribution panel of embodiment. It is a perspective view of the state where the outer cover of the distribution board of an embodiment was closed. It is a perspective view which shows the attachment state of the 2nd antenna of embodiment. It is a perspective view which shows the holding | maintenance state of the coaxial cable of embodiment. It is a perspective view which shows another structure of the antenna holder of embodiment. It is a perspective view which shows the integral structure of the blank member and 2nd antenna of embodiment. It is a perspective view which shows the state which attached the 2nd antenna of embodiment to the housing | casing. It is a front view which shows the state which provided the cable holder of embodiment in the inner cover. It is a perspective view which shows the 1st modification of the cable holder of embodiment. It is a perspective view which shows the 2nd modification of the cable holder of embodiment. It is a front view which shows the state which comprised the track | line which connects the 2nd antenna and communication module of embodiment with the stripline. It is a perspective view showing the 1st modification of the 2nd antenna of an embodiment. It is a perspective view showing the 2nd modification of the 2nd antenna of an embodiment. FIG. 15A is a front view illustrating a third modification of the second antenna of the embodiment. 15B is a cross-sectional view taken along line XX in FIG. 15A.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment)
The schematic block diagram of the distribution board 1 of this embodiment is shown in FIGS. FIG. 1 shows a state in which the inner cover 22 and the outer cover 23 are removed from the main body 21, the inner cover 22, and the outer cover 23 constituting the housing 2. FIG. 2 shows a state where the inner cover 22 is attached to the main body 21 and the outer cover 23 is removed. FIG. 3 shows a state in which the outer cover 23 is closed. The distribution board 1 of the present embodiment includes a box-shaped housing 2 and a plurality of breakers 30, a measurement unit 4, a communication module 5, a first antenna 61, and a second antenna 62 provided in the housing 2. It is prepared and attached to the wall in the building. In addition, the structural member provided in the housing | casing 2 is not the meaning limited to the above, The structural members other than the above may be provided in the housing | casing 2. FIG.

  The housing 2 is configured in a box shape with a main body 21 having an opening 210 on one surface, an inner cover 22 covering the opening 210, and an outer cover 23 covering the opening 210 of the main body 21 from the outside of the inner cover 22. .

  The plurality of breakers 30 are configured to include a main breaker 31 connected to an electric power system and a plurality of branch breakers 32 connected to an electric device, and the power supplied from the system power source is provided in the building. Distribute to each electrical device. When the main breaker 31 and the branch breaker 32 are not distinguished, they are simply referred to as a breaker 30. Furthermore, the distribution board 1 of this embodiment includes a communication module 5 and has a communication function with an external device provided outside the housing 2. The communication module 5 transmits the measurement result of the electric power used by the electrical device measured by the measurement unit 4 to the external device using the first antenna 61 or the second antenna 62 as a radio signal.

  Below, the structure of the distribution board 1 of this embodiment is demonstrated concretely. In addition, the direction used in the following description defines the vertical and horizontal directions in FIG. 1 as the vertical and horizontal directions, and the direction on the wall side (the back direction in FIG. A direction opposite to the wall with respect to 1 (front side in FIG. 1) is defined as a front direction.

  The housing 2 is formed of, for example, a synthetic resin molded product, and is configured by combining a main body 21, an inner cover 22, and an outer cover 23.

  The main body 21 is formed in a rectangular box shape having an opening 210 on one surface (front surface), and the main body 21 is attached to the wall by fixing the back plate to the wall. The main body 21 is attached with a main breaker 31, a branch breaker 32, a measurement unit 4, a communication module 5, a first antenna 61, and a second antenna 62.

  Further, a rectangular window hole 211 is formed in the back plate of the main body 21, and a plurality of mounting holes 212 are formed along the upper side and the lower side of the window hole 211. The back plate of the main body 21 is provided with a connecting member 213 that is attached to the upper mounting hole 212 and the lower mounting hole 212 and straddles the window hole 211. The main breaker 31, the branch breaker 32, the measurement unit 4, and the communication module 5 are attached to the main body 21 via the connecting member 213.

  The inner cover 22 is a so-called decorative panel, is formed in a rectangular shape, and is attached to the main body 21 so as to cover the opening 210 formed on the front side of the main body 21. Further, the inner cover 22 is formed with a window hole 221 for exposing the operation handle 311 for switching the contact state of the main breaker 31 and a window hole 222 for exposing the operation handle 321 for switching the contact state of the branch breaker.

  The outer cover 23 is formed in a rectangular shape, and is attached to the main body 21 so as to cover the opening 210 of the main body 21 on the outer side (front side) than the inner cover 22. The outer cover 23 and the main body 21 are connected by a hinge, and the outer cover 23 is rotatable between a position at which the opening 210 of the main body 21 is closed and a position at which the opening 210 of the main body 21 is opened with the hinge as a fulcrum. It is configured.

  The main breaker 31 has a power system connected to the primary side. A conductive bar having a longitudinal direction in the left-right direction is provided on the right side of the main breaker 31, and this conductive bar is electrically connected to the secondary side of the main breaker 31. Further, a wiring insertion hole 214 formed by exposing a part of the window hole 211 is formed on the upper side of the main breaker 31, and the wiring is connected to the main breaker 31 through the wiring insertion hole 214. The

  The plurality of branch breakers 32 are provided on the right side of the main breaker 31 in the left-right direction, and the primary side is connected to the secondary side of the main breaker 31 by plug-in connection to the conductive bar from the upper side or the lower side. Electrically connected. In addition, each of the branch breakers 32 is electrically connected to the secondary side of an electrical device (for example, a television, a refrigerator, an air conditioner, or a lighting device) provided in the building. Further, a part of the window hole 211 is exposed on the upper side of the branch breaker provided on the upper side with respect to the conductive bar and on the lower side of the branch breaker provided on the lower side with respect to the conductive bar. A wiring insertion hole 214 is formed. Then, the wiring is connected to the branch breaker 32 through the wiring insertion hole 214.

  In addition, a space in which the branch breaker 32 can be installed is determined in the housing 2, and the number of installable branch breakers 32 is determined in advance according to the size of the housing 2 and the like. Since the branch breakers 32 are packed and attached to the main breaker 31 side, an empty space is formed on the right side of the plurality of branch breakers 32 when the number of branch breakers 32 is less than the installable number. In order to fill the empty space of the branch breaker 32, a blank member 33 which is a so-called dummy breaker is used. The blank member 33 is formed so as to have a shape simulating the branch breaker 32, that is, an outer shape conforming to the dimensions of the agreement type earth leakage breaker for a light distribution board defined by JIS (Japanese Industrial Standards). Therefore, the blank member 33 can be attached to the main body 21 by the same means as the branch breaker 32.

  The measurement unit 4 is disposed below the main breaker 31. And the measurement unit 4 measures the electric current which flows into each branch electric circuit with the current sensor provided for every branch electric circuit connected to each branch breaker 32, and calculates the electric power used supplied to an electric equipment for every branch electric circuit. . The measurement result of the power consumption calculated by the measurement unit 4 is transmitted to the communication module 5. The current sensor is configured using, for example, a magnetoresistive element such as a Rogowski coil, a current transformer, or a GMR (Giant Magneto Resistive) element. Note that the measuring unit 4 may be configured to calculate the total power used for each branch circuit by providing a current sensor in the main circuit connected to the main circuit breaker 31 and measuring the current flowing through the main circuit. Good. The position where the measurement unit 4 is arranged is not limited to the above.

  The communication module 5 is attached to the main body 21 in a state of being housed in a case 50 made of a synthetic resin molded product on the left side of the main breaker 31. The communication module 5 has a communication function with an external device such as a HEMS (Home Energy Management System) controller or monitor, and transmits the measurement result of the measurement unit 4. The HEMS controller is a device that monitors and controls an electric device, and controls the operation of the electric device, manages the power used by the electric device, and the like. A monitor is a device that provides a user with information such as power consumption of an electrical device in a visible form.

  The communication module 5 employs wireless communication as a means for communicating with an external device, and transmits and receives wireless signals using the first antenna 61 and the second antenna 62. The specification of the radio signal is selected from, for example, specific low-power radio (frequency 400 MHz, 920 MHz, etc.), wireless LAN (frequency 2.4 GHz, etc.) (LAN: Local Area Network) and the like. The types of the first antenna 61 and the second antenna 62 are selected from, for example, an inverted L antenna, an inverted F antenna, a monopole antenna, a sleeve antenna, and a planar antenna. In addition, the communication module 5 performs communication using the antenna having the better communication quality with the external device among the first antenna 61 and the second antenna 62.

  Next, installation of the first antenna 61 and the second antenna 62 will be described.

  The first antenna 61 is composed of an inverted L-type antenna and is provided with the communication module 5. Specifically, the first antenna 61 is provided on a substrate on which circuit elements constituting the communication module 5 are mounted, and the case 50 is accommodated.

  The second antenna 62 is configured by a sleeve antenna, and is provided on the blank member 33 that fills the empty space of the branch breaker 32. As shown in FIG. 4, the blank member 33 of the present embodiment includes an antenna holder 7 that holds the second antenna 62 on the side surface 331. The antenna holder 7 includes a fixing piece 71 fixed to the side surface 331 of the blank member 33 and a holding piece 72 formed in a bowl shape from a flexible material, and functions as an antenna holding portion. One end of the holding piece 72 is continuous with the end of the fixed piece 71, and a gap is formed between the other end and the fixed piece 71, and the second antenna 62 is sandwiched between the second antenna 62. Hold. The second antenna 62 is fixed to the side surface 331 of the blank member 33 by the antenna holder 72. In the present embodiment, the second antenna 62 is held by the antenna holder 7 so as to protrude upward from the blank member 33. The second antenna 62 is provided behind the inner cover 22, that is, so as to be covered with the inner cover 22 (see FIG. 2).

  The second antenna 62 is electrically connected to the communication module 5 via the coaxial cable 8. The second antenna 62 has a connector 621 to which the end of the coaxial cable 8 is connected, and the case 50 that houses the communication module 5 has a connector 51 to which the end of the coaxial cable 8 is connected on the right side. Have. The coaxial cable 8 is connected to the connector 621 and the connector 51, whereby the second antenna 62 and the communication module 5 are electrically connected, and the coaxial cable 8 can be easily attached and detached. In the present embodiment, the antenna holder 7 included in the blank member 33 is used to hold the vicinity of the connector 621 of the coaxial cable 8.

  As shown in FIG. 5, the coaxial cable 8 is held by a cable holder 9 provided in the housing 2. In the present embodiment, a plurality of cable holders 9 are provided inside the side surface of the main body 21 so that the coaxial cable 8 does not interfere with the wiring in the housing 2. The cable holder 9 has the same configuration as that of the antenna holder 7 and includes a fixing piece 91 fixed to the housing 2 and a holding piece 92 having flexibility, and functions as a cable holding unit. . The cable holder 9 holds the coaxial cable 8 by sandwiching the coaxial cable 8 between the fixed piece 91 and the holding piece 92. In the present embodiment, three cable holders 9 are provided inside the upper surface of the main body 21 (see FIG. 1). The coaxial cable 8 is held by each cable holder 9 and is arranged along the inner surface of the housing 2.

  As described above, the distribution board 1 of this embodiment includes the housing 2, the communication module 5, the first antenna 61, and the second antenna 62. The housing 2 stores a plurality of breakers 30. The communication module 5 is housed in the housing 2 and communicates with an external device provided outside the housing 2. The first antenna 61 and the second antenna 62 transmit and receive radio signals. The first antenna 61 is provided attached to the communication module 5, and the second antenna 62 is attached to a part of the housing 2 that is away from the first antenna 61.

  That is, since the first antenna 61 and the second antenna 62 are provided at positions separated from each other, the communication quality between the first antenna 61 and the second antenna 62 between the external devices is different. The communication module 5 performs communication using the antenna having the better communication quality between the first antenna 61 and the second antenna 62. With the above configuration, communication quality between the communication module 5 and the external device can be ensured. For example, when the left side of the distribution board 1 is a wall and the space is expanded on the right side, the second antenna 62 arranged on the right side of the distribution board 1 rather than the first antenna 61 arranged on the left side. However, communication quality with external devices is considered to be excellent. In such an installation situation of the distribution board 1, the communication quality between the communication module 5 and the external device is ensured by performing wireless communication with the external device using the second antenna 62 having excellent communication quality.

  The first antenna 61 is provided on one side (left side) with respect to the plurality of breakers 30, and the second antenna 62 is provided on the other side (right side) with respect to the plurality of breakers 30.

  That is, the first antenna 61 and the second antenna 62 are provided at positions sandwiching the plurality of breakers 30 (the main breaker 31 and the plurality of branch breakers 32). In general, a relatively large amount of metal material is used for the breaker 30, and the breaker 30 may cause an influence such as attenuation on radio signals transmitted and received by the first antenna 61 and the second antenna 62. However, in the present embodiment, the first antenna 61 and the second antenna 62 are provided at positions where the plurality of breakers 30 are sandwiched. Therefore, at least one of the first antenna 61 and the second antenna 62 is less affected by the breaker 30, and the possibility of ensuring communication quality with an external device is increased. For example, when an external device is provided on the right side with respect to the distribution board 1, the second antenna 62 provided on the right side with respect to the breaker 30 is the first antenna 61 provided on the left side with respect to the breaker 30. It is considered that the influence of the breaker 30 is smaller than that. Therefore, the communication quality between the communication module 5 and the external device is ensured by performing wireless communication with the external device using the second antenna 62 that is less affected by the breaker 30.

  The plurality of breakers 30 include a main breaker 31 and a plurality of branch breakers 32. A main breaker 31 is provided on one side (left side) with respect to the plurality of branch breakers 32. Moreover, the blank member 33 which fills the empty space of the branch breaker 32 formed in the other side (right side) with respect to the some branch breaker 32 is provided. The blank member 33 includes an antenna holder 7 (antenna holding portion) that holds the second antenna 62.

  That is, the second antenna 62 is held by the blank member 33 that fills the empty space of the branch breaker 32 formed on the opposite side of the first antenna 61 with respect to the main breaker 31 and the plurality of branch breakers 32. Therefore, the second antenna 62 is provided at a position sandwiching the main breaker 31 and the plurality of branch breakers 32 with respect to the first antenna 61, and further, the limited space in the housing 2 can be effectively utilized. Further, by using the blank member 33 having the antenna holder 7, the second antenna 62 can be easily attached to the existing distribution board 1 that does not include the means for attaching the second antenna 62.

  Furthermore, in this embodiment, the 2nd antenna 62 is provided so that it may become a position above the branch breaker 32 arranged side by side in the left-right direction. Thereby, the radio signal transmitted and received by the second antenna 62 can be further prevented from being influenced by the branch breaker 32.

  In addition, the structure of the antenna holder 7 which the blank member 33 has is not limited to the above. FIG. 6 shows a modification of the antenna holder 7. The antenna holder 7A shown in FIG. 6 includes a clamp in which a semicylindrical first member 73 and a second member 74 are combined. The first member 73 is fixed to the side surface 331 of the blank member 33 and is coupled to the second member 74 to form a cylindrical gap. The 1st member 73 and the 2nd member 74 are couple | bonded by screwing the collar parts 75 formed in each. When the antenna holder 7A holds the second antenna 62, first, the first member 73 and the second member 74 are separated, and the second antenna 62 is inserted between the first member 73 and the second member 74. The first member 73 and the second member 74 are coupled. Thereby, the second antenna 62 is held in a cylindrical gap formed between the first member 73 and the second member 74.

  Moreover, as shown in FIG. 7, the blank member 33 and the 2nd antenna 62 may be comprised integrally. In the example shown in FIG. 7, the second antenna 62 is provided so as to protrude from the upper surface of the blank member 33, and the connector 621 to which the end of the coaxial cable 8 is connected is provided on the side surface 331 of the blank member 33. ing. Since the blank member 33 and the second antenna 62 are configured integrally, the trouble of attaching the second antenna 62 to the blank member 33 can be omitted. The positions of the second antenna 62 and the connector 621 in the blank member 33 are not limited to the above, and may be other places.

  Further, the installation location of the second antenna 62 is not limited to the above. As shown in FIG. 8, the antenna holder 7 may be provided inside the right side surface of the main body 21, and the second antenna 62 may be attached to the right side surface of the main body 21. The second antenna 62 is provided on the side surface of the main body 21 on the right side opposite to the first antenna 61 with respect to the plurality of breakers 30 (the main breaker 31 and the plurality of branch breakers 32). As a result, at least one of the first antenna 61 and the second antenna 62 is less affected by the breaker 30, and the possibility of ensuring communication quality with an external device increases. Further, the second antenna 62 can be provided even when the number of branch breakers 32 matches the installable number and there is no empty space for the branch breakers 32 and the blank member 33 is not provided. 6 may be provided inside the side surface of the main body 21 and the second antenna 62 may be held along the inner side of the side surface of the main body 21.

  Moreover, the distribution board 1 of this embodiment has the cable holder 9 (cable holding part) in which the housing | casing 2 hold | maintains the coaxial cable 8 which connects the 2nd antenna 62 and the communication module 5 electrically. With the above configuration, since the coaxial cable 8 is wired along the housing 2, it is possible to prevent interference with the wiring in the housing 2.

  The cable holder 9 may be provided on the inner cover 22 as shown in FIG. In the example shown in FIG. 9, a plurality of cable holders 9 are provided on the back surface of the inner cover 22. Since the coaxial cable 8 is wired along the inner cover 22 that covers the main body 21, it is possible to further prevent interference with the wiring that passes through the wiring insertion hole 214 formed in the back plate of the main body 21.

  Moreover, the structure of the cable holder 9 is not limited to the above. In FIG. 10, the 1st modification of the cable holder 9 is shown. The cable holder 9A shown in FIG. 10 has a fixing piece 93 fixed to the side surface of the main body 21, and a J-shaped hook portion 94 formed of a rigid material with one end continuing to the end of the fixing piece 93. And a binding band 95 inserted through a through-hole 941 formed in the hook portion 94. When the coaxial cable 8 is held by the cable holder 9 </ b> A, the coaxial cable 8 is first hooked on the hook portion 94, and the coaxial cable 8 is fastened with a binding band 95. Thereby, the coaxial cable 8 is held by the cable holder 9A. Moreover, the cable holder 9A can prevent the coaxial cable 8 from coming off by providing the binding band 95.

  Next, the 2nd modification of the cable holder 9 is shown in FIG. The cable holder 9 </ b> B shown in FIG. 11 is provided in a mounting hole 212 provided along the upper side and the lower side of the window hole 211 in the back plate of the main body 21. The cable holder 9B includes a bottom piece 96 screwed into the attachment hole 212, a standing piece 97 formed so as to rise from one end of the bottom piece 96, a fixing piece 98 fixed to one surface of the standing piece 97, and a flexible piece. It is comprised with the hook-shaped holding piece 99 which has property. The coaxial cable 8 can be held by sandwiching the coaxial cable 8 between the holding piece 99 and the fixed piece 98. Since the cable holder 9B is provided in any one of the plurality of mounting holes 212, the number of locations where the coaxial cable 8 is held, the location where the coaxial cable 8 is held, and the like can be easily adjusted.

  In addition, when the 2nd antenna 62 is comprised linearly like a sleeve antenna, it is possible to hold | maintain the 2nd antenna 62 using either structure of the cable holder 9, 9A, 9B mentioned above. . Similarly, it is possible to hold the coaxial cable 8 by using any configuration of the antenna holders 7 and 7A.

  The line connecting the second antenna 62 and the communication module 5 is not limited to the coaxial cable 8. As shown in FIG. 12, a part of the line connecting the second antenna 62 and the communication module 5 may be configured by a strip line 80. In the example illustrated in FIG. 12, the strip line 80 is configured by being insert-molded in the inner cover 22. Note that both ends of the strip line 80 are connected to connectors 81 exposed from the back side of the inner cover 22. The strip line 80 and the communication module 5 and the second antenna 62 are connected by the coaxial cable 8.

  As described above, the housing 2 is integrally formed with a line (strip line 80) that electrically connects the second antenna 62 and the communication module 5. With the above configuration, it is possible to further prevent the line (strip line 80) connecting the second antenna 62 and the communication module 5 from interfering with the wiring in the housing 2 in the housing 2. Further, the strip line 80 is provided on the inner cover 22. When the operator connects the wiring to the breaker 30, the work is performed with the inner cover 22 removed, so that the line (strip line 80) that electrically connects the second antenna 62 and the communication module 5 is disconnected during the work. This can be prevented. The strip line 80 is not limited to a configuration in which the strip line 80 is insert-molded in the inner cover 22, and may be configured to be attached to the back side of the inner cover 22.

  Moreover, in the example mentioned above, although the 2nd antenna 62 is comprised by the sleeve antenna, it is not limited to this structure, For example, the 2nd antenna 62 may be comprised by the planar antenna. FIG. 13 shows a first modification of the second antenna 62. The second antenna 62A shown in FIG. 13 is configured by a patch antenna. The second antenna 62 </ b> A is attached to the outside of the right side surface of the main body 21.

  As described above, the second antenna 62 </ b> A is provided on the outer surface of the housing 2. Thereby, even if it is a case where a space cannot be ensured in the housing | casing 2, the 2nd antenna 62A can be provided. In the example shown in FIG. 13, the second antenna 62 </ b> A is provided outside the right side surface of the main body 21, but the installation position of the second antenna 62 </ b> A is not limited to the above position and is different on the outer surface of the housing 2. It may be provided at a position.

  Next, a second modification of the second antenna 62 is shown in FIG. The second antenna 62B shown in FIG. 14 is configured by a patch antenna provided on an insulating substrate 622, and is provided on the outer cover 23. The outer cover 23 includes an antenna attachment portion 24 to which the second antenna 62B can be attached on the inner surface (the surface facing the inner cover 22 when the outer cover 23 is closed). The antenna mounting portion 24 includes a recess 241 in which the substrate 622 is fitted, and a screw hole 242 for fixing the substrate 622 fitted in the recess 241 with a screw. And when attaching the 2nd antenna 62B to the antenna attachment part 24 of the outer cover 23, the board | substrate 622 is first inserted in the recessed part 241, and the board | substrate 622 inserted in the recessed part 241 is fixed with a screw | thread. Accordingly, the second antenna 62B is attached to the antenna attachment portion 24 of the outer cover 23.

  As described above, the housing 2 includes the main body 21 having the opening 210 on one surface (front surface), the inner cover 22 that covers the opening 210 of the main body 21, and the outer cover that covers the opening 210 of the main body 21 outside the inner cover 22. 23, and the outer cover 23 has an antenna attachment portion 24 to which the second antenna 62B can be attached. The second antenna 62B is attached to the antenna attachment portion 24.

  By providing the second antenna 62B on the outer cover 23, the second antenna 62B can be provided even when a space cannot be secured in the housing 2. Further, in the above configuration, since the second antenna 62B can be easily replaced with the substrate 622, the second antenna 62B having an optimal directivity in consideration of the installation status of the distribution board 1 is provided. Thus, the communication quality of the second antenna 62B can be improved.

  The outer cover 23 has a plurality of antenna mounting portions 24, and the second antenna 62 </ b> B is attached to any one of the plurality of antenna mounting portions 24. In the example shown in FIG. 14, a total of nine antenna mounting portions 24 are provided side by side in the vertical direction and the horizontal direction. Then, the second antenna 62B is attached to one antenna attachment portion 24 selected from among the plurality of antenna attachment portions 24 in accordance with the installation environment of the distribution board 1 or the like. Therefore, for example, a position where the communication quality of the second antenna 62B is good is selected in consideration of the installation environment of the distribution board 1, such as a position away from an obstacle such as a wall or a position closer to an external device. Two antennas 62B can be attached.

  The outer cover 23 is configured to be rotatable between a position where the opening 210 of the main body 21 is closed and a position where the opening 210 of the main body 21 is opened with the hinge as a fulcrum. Therefore, the angle of the outer cover 23 may be adjusted so that the communication quality of the second antenna 62B is good in consideration of the polarization plane, directivity, and the like of the second antenna 62B.

  Next, a third modification of the second antenna 62 is shown in FIGS. 15A and 15B. The second antenna 62C shown in FIGS. 15A and 15B is a planar antenna in which a radiating element 623 and a ground conductor 624 are insert-molded on the outer cover 23. In the example illustrated in FIGS. 15A and 15B, the radiating element 623 is disposed outside the ground conductor 624. That is, the ground conductor 624 is disposed on the back side of the outer cover 23, and the radiating element 623 is disposed on the front side of the outer cover 23.

  As described above, the housing 2 includes the main body 21 having the opening 210 on one surface (front surface), the inner cover 22 that covers the opening 210 of the main body 21, and the outer cover that covers the opening 210 of the main body 21 outside the inner cover 22. 23. The second antenna 62 </ b> C includes a planar antenna having a radiating element 623 and a ground conductor 624, and is provided on the outer cover 23. The radiating element 623 is disposed outside the ground conductor 624.

  With the above configuration, the ground conductor 624 also functions as a shield that prevents noise from the main body 21 side from propagating to the radiating element 623, and the communication quality of the second antenna 62C can be improved. Further, since the second antenna 62C is insert-molded in the outer cover 23, the second antenna 62C is not exposed and the design of the distribution board 1 can be prevented from being damaged.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made according to design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it can be changed.

DESCRIPTION OF SYMBOLS 1 Distribution board 2 Case 21 Main body 22 Inner cover 23 Outer cover 24 Antenna mounting part 30 Breaker 31 Main breaker 32 Branch breaker 33 Blank member 5 Communication module 61 1st antenna 62, 62A, 62B, 62C 2nd antenna 623 Radiation element 624 Ground conductor 7, 7A Antenna holder (antenna holding part)
8 Coaxial cable 80 Line (strip line)
9, 9A, 9B Cable holder (cable holder)

Claims (9)

A housing for storing a plurality of breakers;
A communication module that is housed in the housing and communicates with an external device provided outside the housing;
A first antenna and a second antenna for transmitting and receiving radio signals;
The first antenna is provided attached to the communication module,
The distribution board according to claim 1, wherein the second antenna is attached to a portion of the housing that is away from the first antenna. The first antenna is provided on one side with respect to the plurality of breakers,
The distribution board according to claim 1, wherein the second antenna is provided on the other side with respect to the plurality of breakers. The plurality of breakers are configured to include a main breaker and a plurality of branch breakers,
The main breaker is provided on one side with respect to the plurality of branch breakers,
A blank member is provided to fill the empty space of the branch breaker formed on the other side with respect to the plurality of branch breakers,
The distribution board according to claim 1, wherein the blank member has an antenna holding portion that holds the second antenna. The said housing | casing has a cable holding part holding the coaxial cable which electrically connects a said 2nd antenna and the said communication module. The component of any one of Claims 1-3 characterized by the above-mentioned. Electric board. The distribution board according to any one of claims 1 to 3, wherein the casing is integrally formed with a line that electrically connects the second antenna and the communication module. The distribution board according to claim 1, wherein the second antenna is provided on an outer surface of the casing. The housing has a main body having an opening on one surface, an inner cover that covers the opening of the main body, and an outer cover that covers the opening of the main body outside the inner cover,
The outer cover has an antenna attachment portion to which the second antenna can be attached,
The distribution board according to claim 1, wherein the second antenna is attached to the antenna attachment portion. The outer cover has a plurality of the antenna mounting portions,
The distribution board according to claim 7, wherein the second antenna is attached to any one of the plurality of antenna attachment portions. The housing has a main body having an opening on one surface, an inner cover that covers the opening of the main body, and an outer cover that covers the opening of the main body outside the inner cover,
The second antenna is composed of a planar antenna having a radiating element and a ground conductor, and is provided on the outer cover.
The distribution board according to claim 1, wherein the radiating element is disposed outside the ground conductor.

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