JP2007150622A - Call device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a call device which can prevent howling and be miniaturized, and can obtain a sense of integrity as a system when used as one mode of a functional device in a wiring system. <P>SOLUTION: The call device is provided with a power source connector 11A for receiving power supply from a power source connector 11A' of an extended functional module 10b electrically connected to a power line L1 via a gate device 3; an information connector 11B for exchanging information signals with an information connector 11B' of the extended functional module 10b electrically connected to an information line L2; a speaker SP for outputting voice information transmitted via the information connector 11B; and microphones M1, M2 for transmitting the voice information via the information connector 11B. The microphones M1, M2 each have directivity of a small angle in the same direction as that of a voice to be output from the speaker SP, and have mutually different distances from the speaker SP. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication device used in a wiring system capable of sending information and power simultaneously.

  Conventionally, there is a communication device installed indoors with an interphone system or the like, which includes a speaker that outputs sound from a communication device installed in another place, a microphone that inputs sound transmitted to the other communication device, and the like. Yes.

  Since howling occurs when the sound generated from the speaker wraps around the microphone, various measures for preventing howling are taken. For example, as a first conventional example, a loop circuit including a speaker and a microphone is formed in a communication device, and howling occurs when the loop gain exceeds 1, so that loss in a variable loss circuit provided in the loop circuit occurs. Some control the amount so that the loop gain is 1 or less to prevent howling. Here, it is assumed that the smaller signal level of the transmission signal and the reception signal is not important, and the transmission loss of the variable loss circuit inserted in the transmission line having the smaller signal level is increased.

  However, in the first conventional example, when the distance between the microphone and the speaker is short, the level of the received voice that goes from the speaker to the microphone increases, the transmitted signal becomes larger than the received signal, and the voice comes out from the speaker. The control circuit has switched to the transmission state in spite of the reception state, and there has been a state in which no sound to be output from the speaker is generated (reception blocking).

  Therefore, as a second conventional example, a pair of microphones, a delay circuit that delays the output of the microphone closer to the speaker by the delay time of the sound wave corresponding to the difference in distance between the two microphones and the speaker, both microphones and the speaker The level adjustment amplifier circuit that adjusts the level corresponding to the difference in distance between the two microphones to match the output level of both microphones with the sound from the speaker, and both microphone outputs that have passed through the delay circuit and level adjustment amplifier circuit There has been proposed a communication device that includes a differential amplifier circuit as described above and uses the output of the differential amplifier circuit as a transmission signal.

In this communication device, after picking up the sound from the speaker with a pair of microphones, the delay and level adjustment is performed so that the sound component from the speaker input to both microphones is canceled by the differential amplifier circuit. The transmitted voice can be transmitted in a state in which only the voice component from the speaker is removed and no reception blocking occurs. (For example, see Patent Document 1)
Japanese Patent No. 2607257 (page 2, left column, line 13 to right column, third line, page 4, right column, lines 26 to 49, FIGS. 1 and 5)

  However, also in the second conventional example, in order to prevent howling, the distance between the speaker and the microphone cannot be made very small, and further downsizing of the apparatus has been desired.

  In particular, the above-described conventional communication device is used as one form of the functional device in a wiring system in which a functional device such as a switch or an outlet installed on an indoor ceiling surface, wall surface, or floor surface is connected to a power line or an information line. In this case, it becomes larger than other functional devices, and the unity as a system cannot be obtained. Furthermore, when using for the above-mentioned wiring system, workability and expandability as a system are also required.

  The present invention has been made in view of the above-mentioned reasons, and its purpose is to prevent howling and to reduce the size of the wiring system. Is to provide a communication device capable of obtaining the above.

  The invention according to claim 1 is electrically connected directly to a first connection portion that is installed on an indoor ceiling surface, wall surface, and floor surface and is electrically connected to at least one system wiring for transmitting power and information signals. A second connection unit for receiving and supplying power and exchanging information signals with the first connection unit, a speaker for outputting audio information transmitted through the second connection unit, A plurality of microphones that transmit audio information via the two connection portions, and each microphone has directivity so as not to pick up the sound output from the speaker, and the distance from the speaker is another It is different from at least one of the microphones.

  According to the present invention, by reducing the directivity of each microphone, even if the distance between the speaker and the microphone is shortened, the microphone does not pick up the sound output from the speaker. Miniaturization can be achieved. Therefore, even if the wiring system is used as one form of the functional device, a sense of unity as the system can be obtained. Further, by arranging a plurality of microphones so that the distances from the speakers are different from each other, it is possible to cancel the sound components from the speakers input to the microphones, thereby further improving the howling prevention effect.

  In addition, if the second connection unit is electrically connected to the first connection unit, the communication device can secure the power path and the information path at the same time, and it is not necessary to perform a new wiring work. Obtainable.

  According to a second aspect of the present invention, in the first aspect, the plurality of microphones have directivity in the same direction as the output direction of the speaker.

  According to the present invention, acoustic coupling between a speaker and a microphone can be reduced, and howling can hardly occur.

  A third aspect of the present invention is characterized in that in the first or second aspect, each of the microphones is a condenser type silicon microphone.

  According to the present invention, a narrow directivity can be obtained and a small size can be achieved.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the first connecting portion is mechanically coupled to a functional device having a predetermined function, and the second connecting portion is a functional device. It is characterized by receiving power supply from and receiving information signals with functional devices.

  According to the present invention, by using the same information path as that of the functional device, it is possible to easily perform the interlock control between the call device and the functional device, and to obtain excellent extensibility.

  According to a fifth aspect of the present invention, in the fourth aspect, the second connecting portion is provided on one side surface of the apparatus, and power is supplied to another functional device mechanically coupled to the other side surface of the apparatus. A third connecting portion for transmitting / receiving an information signal to / from the functional device is provided on the other side of the device.

  According to the present invention, the power path and the information path can be easily secured by connecting the functional device to both sides of the telephone device, and the expandability of the wiring system is further expanded.

  The invention of claim 6 is characterized in that, in claim 5, the form of the second and third connection parts is fixed in response to the stylization of the arrangement and shape of the first connection parts. To do.

  According to the present invention, the communication device and the functional device can be generalized.

  The invention of claim 7 is mechanically coupled to the gate device including the first connection portion according to any one of claims 1 to 3, wherein the second connection portion is supplied with power from the gate device, An information signal is exchanged with a gate device.

  According to the present invention, by using the same information path as the gate device, the interlock control via the gate device can be easily performed, and excellent expandability can be obtained.

  The invention of claim 8 is to supply electric power to a functional device having a predetermined function and mechanically connected to the side surface of the apparatus, and to exchange information signals with the functional device. The third connection portion is provided on at least one side surface.

  According to the present invention, the expandability of the wiring system is further expanded by connecting the functional device to the side portion of the communication device.

  A ninth aspect of the invention is characterized in that, in the seventh or eighth aspect, the form of the second connection part is fixed in correspondence with the stylization of the arrangement and shape of the first connection part. .

  According to the present invention, the communication device and the gate device can be generalized.

  As described above, according to the present invention, howling can be prevented and downsizing can be achieved, and even when the wiring system is used as one form of a functional device, a sense of unity as a system can be obtained. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
In the system configuration using the communication device 10a of this embodiment, as shown in FIG. 13, one or a plurality of switch boxes 2 embedded and disposed at appropriate positions in a building are provided, and a leading wall is provided between the switch boxes 2 in the wall surface. The wired power line L1 and the information line L2 are sent and wired, and the power line L1 drawn indoors via the main breaker MB and the branch breaker BB in the wiring board 1 is connected to the switch box 2 at the beginning. The information line L2 is introduced and connected to the external Internet network NT via a gateway GW (with built-in router and hub). Here, the switch box 2 is provided at a high position HP such as an indoor ceiling surface, the switch box 2 is provided at a height position (middle position MP) recommended by a wall switch or the like, and near the foot (low position LP). ).

  These switch boxes 2 are standardized corresponding to a series of mounting frames 4 (see FIG. 14) to which three large-sized rectangular single-module embedded wiring devices can be mounted. As shown in FIG. 1, the power line L1 and the information line L2 that are sent from the wiring board 1 or another switch box 2 are introduced from the upper part as shown in FIG. 1, and the other switch box 2 is introduced from the lower part. A power line L1 and an information line L2 for leading and wiring are derived. The body of the gate device 3 to which the basic function module 8 is connected is attached to each switch box 2 by the attachment frame 4.

  As shown in FIG. 14, the mounting frame 4 is provided with a window hole 4a for mounting an instrument in the center, and the front part of the instrument body to be mounted is fitted into the window hole 4a from the back, and the left and right frame pieces are attached. The locked body provided on the both sides of the device main body is locked by the locking means provided on the device to fix the device main body. And the attachment screw | thread (not shown) penetrated to the attachment hole 4b provided in the up-and-down frame piece is fastened to the screw hole (not shown) of the switch box 2, and it attaches to the switch box 2 with the instrument main body. Further, when the mounting is performed on the wall panel with the embedded hole opened without using the switch box 2, the wall panel can be clamped with a so-called clip fitting or can be mounted with a wood screw.

  As shown in FIG. 15, the gate device 3 is provided with connection terminal portions 5a and 5b having a quick connection terminal structure and connection terminal portions 5a ′ and 5b ′ for feed wirings on the back surface of the body, and corresponding power lines L1 and information lines. L2 is connected. Further, on the front surface of the body, a power path connection port 6A having a contact portion electrically connected to the sent power line L1, and an information path electrically connected to the sent information line L2. A modular connection port 6 having a connection port 6B is provided as shown in FIG.

  These connection ports 6A and 6B are standardized as a system in terms of the distance between them, the arrangement of internal contact portions, the shape of the opening, and the like. The front surface of the switch box 2 is covered so as to cover the front surface of the body of the gate device 3. Connected portions 7A and 7B of the connector 7 provided on the back surface of the basic function module 8 shown in FIG. 16 attached to the opening side are detachably coupled to the connection ports 6A and 6B.

  The basic function module 8 constitutes a functional device with the extended function module 10 described later, and the circuit shown in FIG. 19 is built in the flat module body 8A made of synthetic resin shown in FIGS. 16 and 17A. By connecting the connected portions 7A and 7B of the connector 7 on the back surface to the connection ports 6A and 6B of the gate device 3, the front opening of the switch box 2 is covered and the flange on the periphery is switched. It is in a state of being overlapped on the wall surface around the front opening of the box 2, and in that state, a mounting screw (not shown) is inserted from the front side into a mounting hole 80 drilled in the upper and lower center. It is attached to the switch box 2 via the attachment frame 4 by being screwed and fastened into the screw holes 4c provided in the upper and lower frames.

  Further, on the front surface of the module main body 8A, at a position above or below the opening position of the upper and lower mounting holes 80, as shown in FIG. 17A, a wide groove 81a and a narrow width are formed in the width direction of the module main body 8A. A connecting groove 81 comprising a groove 81b is formed to be divided into left and right by a central partition wall 82.

  A half of one side of the synthetic resin coupling body 100 shown in FIG. 17B is fitted into the coupling groove 81 on the left or right side of the partition wall 82 to a position where it contacts the partition wall 82, and the other half of the coupling body 100 is illustrated. As shown in FIG. 18, the basic function module 8 and the extended function module 10 can be mechanically coupled by fitting into a connecting groove 81 that is similarly provided on the extended function module 10 side. The connecting body 100 is provided with a groove 100a in which a partition wall 81c for partitioning the wide groove 81a and the narrow groove 81b is fitted on the back surface, and is inserted so as to straddle both the grooves 81a and 81b. In the basic function module 8, the decorative cover 8 </ b> B is detachably attached from the front side, and in the extended function module 10, the lid 83 is closed so as to be fitted over the connecting groove 81. A certain connected body 100 is held so as not to fall off and is maintained in a connected state. Thus, the connecting body 100 and the connecting groove 81 constitute connecting means for the basic function module 8 and the extended function module 10.

  In the wiring system of the present embodiment, a plurality of types of basic function modules 8 are prepared depending on functions, and the basic function module 8 is a commercial power supply AC supplied via a connected portion 7A as shown in FIG. For transmitting / receiving an information signal transmitted bi-directionally through an information line L2 connected via an AC / DC converter 21 that converts the power to an operating power source + V of an internal circuit composed of a stable DC voltage and a connected portion 7B Transmission unit 22, power supply connectors 9A and 9A 'connected to commercial power supply AC via connected part 7A, and information connector connected to information line L2 via communication transmission part 22 and connected part 7B 9B, 9B ′ and the information signal received by the communication transmission unit 22 are used to perform processing, and from the basic function module 8 to another basic function module 8 Data is exchanged between the arithmetic processing unit 23 that performs data generation processing when data is sent to the extended function module 10 or via the information line L2, and the arithmetic processing unit 23 via the I / O interface 24. The function unit 25 is operated by performing the operation, and these units are supplied with the operating power source + V from the AC / DC converter 21. The configuration of the function unit 25 differs depending on the basic function module 8.

  A male power connector 9A and an information connector 9B are provided on one side of both side surfaces of the module main body 8A of the basic function module 8, and a female power connector 9A 'and an information connector 9B' are provided on the other side. Yes. Then, by connecting the contact pieces of the connected portion 7A to the contact pieces of the power connectors 9A and 9A ′, the commercial power supply AC is supplied even if the extended function module 10 is connected in either direction. To be able to. Further, by connecting the input / output of the communication transmission unit 22 to the contact pieces of the information connectors 9B and 9B ′, the information signal can be exchanged even if the extended function module 10 is connected in either the left or right direction. . The power connectors 9A and 9A ′ are arranged to be biased to one end on both side surfaces of the module body 8A, and the information connectors 9B and 9B ′ are biased to the other side on both side surfaces of the module body 8A. Arranged.

  The power connectors 9A and 9A ′ and the information connectors 9B and 9B ′ are standardized as a system in the arrangement of the internal contact portions, the shape of the openings, and the power connector and information arranged on the same surface. The distance from the connector for the connector is also standardized as a system, and power supply connectors 11A and 11A ′ and information connectors 11B and 11B ′, which will be described later, of the extended function module 10 are detachably coupled.

  Next, in the wiring system according to the present embodiment, a plurality of types of extended function modules 10 are prepared according to functions that operate upon receiving power supply, and the extended function module 10 includes a power connector 11A as shown in FIG. , 11A ′, the information connectors 11B, 11B ′, and the commercial power supply AC supplied via any one of the power connectors 11A, 11A ′ are converted into an operating power supply + V of an internal circuit composed of a stable DC voltage. AC / DC converter 31, communication transmission unit 32 that transmits and receives information signals transmitted bidirectionally via information connectors 11 </ b> B and 11 </ b> B ′, and processing by capturing data from information signals received by communication transmission unit 32 To the basic function module 8 or another extended function module 10 from the extended function module 10 or information An arithmetic processing unit 33 that performs data generation processing when sending data via L2 and a functional unit 35 that operates by exchanging data with the arithmetic processing unit 33 via the I / O interface 34 These units are supplied with the operating power supply + V from the AC / DC converter 31. The configuration of the function unit 35 differs depending on the extended function module 10.

  In the extended function module 10, the height of the module main body 10A is basically standardized to the same height as that of the basic function module 8 as shown in FIG. Standardized to an integral multiple of the unit module dimensions.

  In addition, a male power connector 11A and an information connector 11B are provided on one side of both side surfaces of the module body 10A of the extended function module 10, and a female power connector 11A ′ and an information connector 11B ′ are provided on the other side. Provided. The power connectors 11A and 11A ′ are biased to one end on both side surfaces of the module body 10A, and the information connectors 11B and 11B ′ are biased to the other side on both side surfaces of the module body 10A. Be placed. These power supply connectors 11A and 11A ′ and information connectors 11B and 11B ′ are arranged in the same manner as the power supply connectors 9A and 9A ′ and information connectors 9B and 9B ′ of the basic function module 8, and the arrangement and opening of the internal contact portions. The shape of the unit is standardized as a system, and the interval between the power connector and the information connector arranged on the same plane is also standardized as a system. The power connectors 9A and 9A ′ of the basic function module 8 are standardized. The information connectors 9B and 9B ′ or the power connectors 11A and 11A ′ and the information connectors 11B and 11B ′ of the other extended function modules 10 are detachably coupled.

  Specifically, the male power connector 11A and the information connector 11B are the female power connector 9A 'of the basic function module 8, the information connector 9B', or the female connector of another extension function module 10. Connected to the power connector 11A ′ and the information connector 11B ′, the female power connector 11A ′ and the information connector 11B ′ are the male power connector 9A, the information connector 9B of the basic function module 8, or The other extension function module 10 is connected to the male power connector 11A and the information connector 11B.

  In the module body 10A, the contact pieces of these power supply connectors 11A and 11A ′ are connected to each other, and the power supply connector on one side is fitted to the power supply connector of the adjacent basic function module 8 or the extended function module 10. When the power is received (power reception port), the other power connector is the power supply side (power supply port).

  Further, by connecting the input / output of the communication transmission unit 32 to the contact pieces of the information connectors (information transfer ports) 11B and 11B ′, the basic function module 8 and other extended function modules 10 are connected in either direction. However, the information signal can be exchanged, and the information signal can be exchanged with the basic function module 8 or the extended function module 10 adjacent to both sides.

  Further, the shape of the module main body 10A of the extended function module 10 is such that the back surface is formed as a flat surface as shown in FIGS. The upper and lower positions are provided with a connecting groove portion 81 including a wide groove 81a and a narrow groove 81b for inserting the connecting body 100 in the same manner as the basic function module 8, and a lid portion for opening and closing the connecting groove portion 81. 83, the lid 83 is opened when the connecting body 100 is mounted or removed, and is closed as described above when the mounting state of the connecting body 100 is maintained (FIG. 21 (c). )reference).

  Next, the call device 10a of this embodiment which is one form of the extended function module 10 will be described below. As shown in FIG. 2, the communication device 10a is configured by housing an element portion 40a in a module main body 10A, and in the element portion 40a, similarly to the extended function module 10, an AC / DC converter 31, a communication transmission portion. 32, an arithmetic processing unit 33, an I / O interface 34, and a functional unit 35 are accommodated.

  The element portion 40a is formed in a box shape as shown in FIG. 3, and a speaker SP, two microphones M1 and M2, a call switch SW1, and an alarm release switch SW2 are arranged on the front surface, and one side of both side surfaces is A male power connection 45A and information signal connection 45B are provided on the other side, and a female power connection 45A ′ and information connection 45B ′ are provided on the other side. The power connector 11A and the information connector 11B are electrically connected to each other, and the power connector 45A ′ and the information signal connector 45B ′ are connected to the standardized power connector 11A ′ and the information connector 11B ′. Is done.

  That is, the wiring connected from the element part 40a to the power connectors 11A and 11A ′ and the information connectors 11B and 11B ′ is connected via the power connection parts 45A and 45A ′ and the information signal connection parts 45B and 45B ′. It is done.

  A plurality of sound holes 10B and insertion holes 10C and 10C for exposing the call switch SW1 and the alarm release switch SW2 to the front surface are formed on the front surface of the module body 10A facing the speaker SP and the microphones M1 and M2. (See FIG. 2).

  In the element unit 40a, as shown in FIG. 4, as the function unit 35, in addition to the speaker SP, the microphones M1 and M2, the call switch SW1, and the alarm release switch SW2, an amplification unit 35a, a signal processing unit 35h, Echo cancellation units 35c and 35d are provided. An audio signal transmitted from another room or the like via the information line L2 is amplified by the amplifying unit 35a via the echo canceling unit 35d and then output from the speaker SP. Further, by operating the call switch SW1, a call can be made, and each audio signal input from the microphones M1 and M2 is subjected to signal processing to be described later in the signal processing unit 35h, and then passes through the echo cancellation unit 35c. It is transmitted to another room or the like via the information line L2. That is, it functions as an intercom that allows two-way calls between rooms.

  Further, when an alarm signal is transmitted from the basic function module 8 or the extended function module 10 having a sensor function installed in the room where the communication device 10a is arranged, or another room via the information line L2, An alarm sound is emitted from the speaker SP, but the alarm sound output can be canceled by operating the alarm cancel switch SW2.

  Here, in the present embodiment, in order to prevent howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP, the following configuration is provided. First, the microphone M1 is disposed in the vicinity of the speaker SP, and the microphone M2 is disposed at a position away from the speaker with the switches SW1 and SW2 interposed therebetween.

  And the vibration surface of the speaker SP is installed toward the front through the sound hole 10B of the module main body 10A, and sound is output toward the front of the module main body 10A. Furthermore, the microphones M1 and M2 are also installed forward through the sound hole 10B of the module main body 10A, and as shown in FIG. 5, the unidirectional with the narrow range in front of the module main body 10A as the sound collection range. Each has sex. That is, since the microphones M1 and M2 have a narrow-angle directivity in the same direction as the sound output from the speaker SP, the acoustic coupling between the speaker SP and the microphones M1 and M2 is reduced. Even if the distance from the microphone is shortened, the microphones M1 and M2 are difficult to pick up the sound output from the speaker SP.

  Therefore, howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP can be prevented. Further, since it is not necessary to increase the distance between the speaker SP and the microphones M1 and M2, the communication device 10a can be reduced in size and formed to have the same size as the other basic function module 8 and the extended function module 10. Even if the wiring system is used as one form of a functional device, a sense of unity as a system can be obtained.

  A configuration example of the microphones M1 and M2 having the unidirectional characteristics is shown below. The microphones M1 and M2 are made of capacitor-type silicon microphones, and the acoustic signal-electric signal converter has the configuration shown in FIGS. 6 (a) and 6 (b). An upper electrode formed of a polysilicon film, which includes a lower electrode 51 made of a silicon substrate formed on a substrate 57, a vibrating portion 53c, and support portions 53b extended to four locations on the outer periphery of the vibrating portion 53c. 53, a cavity 54a formed between the lower electrode 51 and the upper electrode 53, and an insulating layer 52 made of an SiN film disposed between the lower electrode 51 and the upper electrode 53. The insulating layer 52 covers substantially the entire surface of the lower electrode 51 except that an opening is provided almost directly below the vibrating portion 53 c of the upper electrode 53 and a region for connecting a terminal to the lower electrode 51. A plurality of small holes 53a are formed in the vibration portion 53c. Further, a terminal 55 made of an Au / TiW film connected to the lower electrode 51 is formed in the peripheral portion, and a terminal 55 made of an Au / TiW film connected to the upper electrode 53 is formed on the support portion 53b.

  When vibration corresponding to sound is applied from the outside, the upper electrode 53 that is a vibration film vibrates, and the distance from the lower electrode 51 changes. As a result, the capacitances of both electrodes 51 and 53 change, the amount of charge changes, and current flows from both electrodes 51 and 53 in accordance with the change in the amount of charge.

  The current flowing from both electrodes 51 and 53 is converted into a voltage by the circuit shown in FIG. 7 and output to the signal processing unit 35h as an audio signal. In FIG. 7, the acoustic signal-electric signal converters of the microphones M1 and M2 are denoted by Cm1 and Cm2, respectively. The microphone M2 includes a constant voltage circuit K1 including a chip IC that converts an operation power source + V (for example, 5V) output from the AC / DC converter 31 (see FIG. 4) into a constant voltage Vr (for example, 12V), and the microphone M1. In the circuit, a constant voltage Vr is applied to the series circuit of the resistor R11 and the acoustic signal-electric signal converter Cm1, and the connection midpoint between the resistor R11 and the acoustic signal-electric signal converter Cm1 is a junction via the capacitor C11. It is connected to the gate terminal of the J-FET element S11 of the type. The drain terminal of the J-FET element S11 is connected to the operating power supply + V, and the source terminal is connected to the ground via the resistor R12. Here, the J-FET element S11 is for electrical impedance conversion, and the voltage at the source terminal of the J-FET element S11 is output to the signal processing unit 35h as an audio signal.

  Similarly, in the microphone M2, a constant voltage Vr is applied to the series circuit of the resistor R21 and the acoustic signal-electric signal converter Cm2, and the connection midpoint between the resistor R21 and the acoustic signal-electric signal converter Cm2 is the capacitor C21. To the gate terminal of the junction type J-FET element S21. The drain terminal of the J-FET element S21 is connected to the operating power supply + V, and the source terminal is connected to the ground via the resistor R22. Here, the J-FET element S21 is for electrical impedance conversion, and the voltage at the source terminal of the J-FET element S21 is output to the signal processing unit 35h as an audio signal.

  Furthermore, in this embodiment, as shown in FIG. 6, the insertion hole 56 is provided in the lower electrode 51 and the substrate 57 opposed to the substantial center of the vibration part 53c, and the cavity 54a is communicated with the outside. The acoustic signal (indirect sound) that reaches the front (upper electrode 53 side) from the electrode 51 side and reaches the front surface of the vibrating portion 53c is the acoustic signal (directly) that reaches the rear surface of the vibrating portion 53c through the insertion hole 56 from the rear. It can be canceled by the sound), and unidirectionality limited to the front can be obtained. At this time, an obstacle is formed in the insertion hole 56 so that the speed of the direct sound is delayed to reach the indirect sound at the same time.

  Or, it has an interference tube type that narrows the directivity acoustically by attaching a long tube with a slit on the side to the tip of the microphone unit, and two unidirectional microphone units of normal phase and reverse phase, A secondary sound pressure gradient type that electrically narrows the directivity may be used.

  By configuring the condenser-type silicon microphone as described above, the microphones M1 and M2 have a narrow directivity and can be configured in a small size.

  In the present embodiment, the following processing is further performed to prevent howling. As shown in FIG. 8, the signal processing unit 35 h (see FIG. 4) includes an amplification unit 350 that amplifies the output of the microphone M <b> 1 in a non-inverted manner, and a frequency other than the audio band (300 to 4000 Hz) from the output of the amplification unit 350. A band-pass filter 351 for removing noise, a delay circuit 352 for delaying the output of the band-pass filter 351, an amplifying unit 353 for inverting and amplifying the output of the microphone M2, and noise having a frequency other than the audio band from the output of the amplifying unit 353 A band-pass filter 354 for removing the signal, an adder circuit 355 for adding the outputs of the delay circuit 352 and the band-pass filter 354, and an A / D converter circuit 356 for converting the output of the adder circuit 355 from an analog signal to a digital signal. Prepare.

  9 to 12 show audio signal waveforms of respective parts of the signal processing unit 35h. First, both microphones M1 and M2 are arranged so as to be exposed in the same plane as the speaker SP on the front surface of the element portion 40a as shown in FIG. 2, and from the center of the speaker SP to the center of each microphone M1 and M2. Are X1 <X2, where X1 and X2 are X1, X2, respectively. Therefore, when the sound from the speaker SP is picked up by the microphones M1 and M2, the output Y21 of the microphone M2 has a smaller amplitude than the output Y11 of the microphone M1, and the difference in distance between the microphones M1 and M2 and the speaker SP (X2) The phase of the output Y21 of the microphone M2 is delayed by the delay time [Td = (X2-X1) / Vs] (Vs is the speed of sound) corresponding to -X1) (see FIGS. 9A and 9B).

  Then, the amplifying unit 350 generates an output Y12 obtained by non-inverting amplification of the output Y11, and the amplifying unit 353 generates an output Y22 obtained by inverting and amplifying the output Y21 to invert the phase by 180 °. At this time, level adjustment corresponding to the difference (X2−X1) in the distance between the two microphones M1 and M2 and the speaker SP is performed to match the output levels of the two microphones M1 and M2 with respect to the sound from the speaker SP (FIG. 10 ( a) (b)). In this embodiment, the amplification factor of the amplification unit 350 is approximately 1, and the amplification unit 350 may be omitted.

  The bandpass filters 351 and 354 generate outputs Y13 and Y23 obtained by removing noise of frequencies other than the audio band from the outputs Y12 and Y22 (see FIGS. 11A and 11B).

  Next, the delay circuit 352 is composed of a time delay element or a CR phase delay circuit, and delays the output of the microphone M1 closer to the speaker SP by the delay time Td, so that the output Y14 of the delay circuit 352 The phase with the output Y23 of the band pass filter 354 is matched. Then, by adding the outputs Y14 and Y23 in the adder circuit 355, an output Ya in which the audio signal corresponding to the audio from the speaker SP is canceled is generated (see FIGS. 12A to 12C).

  On the other hand, the sound pressure at the microphones M1 and M2 with respect to the sound (call speech) generated from the front of the microphones M1 and M2 may be regarded as substantially equal, and the levels of the outputs Y11 and Y21 of the microphones M1 and M2 are approximately equal. Here, since the amplification factor of the amplification unit 353 is larger than the amplification factor of the amplification unit 350, the output Y22 of the amplification unit 353 is larger than the output Y12 of the amplification unit 350, and the output Ya of the addition circuit 355 corresponds to the sound. Output is obtained.

  As described above, the output Ya of the adding circuit 355 does not include the sound component from the speaker SP, and only the sound component emitted from the front of the communication device 10a toward the microphones M1 and M2 is extracted. Even when the sound from the front of the microphones M1 and M2 and the sound from the speaker SP are generated simultaneously, only the sound component from the speaker SP is removed.

  The A / D conversion circuit 356 converts the output Ya of the addition circuit 355 from an analog signal to a digital signal, and outputs the digital signal to the echo cancellation unit 35c. The echo cancellation units 35c and 35d store the digital signal from the A / D conversion circuit 356 in a memory and perform the following processing by performing digital signal processing with the CPU or DSP.

  First, the echo canceling unit 35c (see FIG. 4) takes the output of the echo canceling unit 35d as a reference signal and performs an operation on the output of the signal processing unit 35h, thereby wrapping around the microphones M1 and M2 from the speaker SP. Cancel the audio signal. Further, the echo canceling unit 35d takes the output of the echo canceling unit 35c as a reference signal, and performs an operation on the output of the I / O interface 34, so that the audio signal from the speaker to the microphone at the other party on the other side can be obtained. It also cancels wraparound.

  Specifically, the echo cancellation units 35c and 35d are configured by a speaker SP-microphone M1, M2-signal processing unit 35h-echo cancellation unit 35c-I / O interface 34-echo cancellation unit 35d-amplification unit 35a-speaker SP. By adjusting the amount of loss in variable loss means (not shown) provided in the loop circuit, howling is prevented by setting the loop gain to 1 or less.

  In FIG. 8, an A / D conversion circuit 356 is provided at the output stage of the signal processing unit 35h to convert an analog signal into a digital signal and output an audio signal. If an A / D conversion circuit (not shown) is provided for each and the subsequent processing is performed with digital signals, the delay processing in the delay circuit 352 can be easily performed.

  Note that the number of microphones is not limited to two, and a plurality of microphones corresponding to the situation may be arranged to perform the same processing as described above.

  Also, in the extended function module 10 other than the communication device 10a, as shown in FIG. 1, the element part 40 having the same external configuration as the element part 40a is housed in the module body 10A, and each extended function module 10 is stored. It is composed. Therefore, the module main body 10A provided with the power connectors 11A and 11A ′ and the information connectors 11B and 11B ′ in which the arrangement of the internal contact portions, the shape of the openings, the interval, and the like are standardized as a system has various functions. Can be used in common with the extended function module 10 having the above, and it is sufficient to select the element unit 40 to be accommodated depending on the function, so that the parts can be shared. Further, if the basic function module 8 has the same configuration, and the element portion housed in the module main body 8A is selected according to the function of the basic function module 8, the parts can be shared in the same manner as described above.

  For example, as shown in FIG. 1, a basic function module 8b constituting a wall switch for turning on / off a lighting fixture is connected to the gate device 3, and an extended function module having a clock function is provided on the right side of the basic function module 8b. The intercom function can be added to various functional devices such as a wall switch function and a clock function by connecting the communication device 10a to the right side of the extended function module 10b. Alternatively, a new extended function module 10b can be connected to the communication device 10a installed in advance.

  In this case, the power connector 11A ′ and the information connector 11B ′ of the extended function module 10b are installed on the indoor ceiling surface, wall surface, and floor surface and are electrically connected to at least one line of wiring for transmitting power and information signals. The power connector 11A and the information connector 11B of the communication device 10a are supplied with power from the first connection unit, and receive information signals with the first connection unit. It corresponds to a second connection part for giving and receiving. Further, if an extended function module (not shown) having a predetermined function is connected to the right side of the communication device 10a, the power connector 11A ′ and the information connector 11B ′ of the communication device 10a supply power to the extended function module. This corresponds to a third connection unit for exchanging information signals with the extended function module.

  Therefore, the communication device 10a is connected to the power line L1 and the information line L2 that are preliminarily wired in advance through the gate device 3, the basic function module 8, and the other extended function module 10, so that the power path and the information path Can be secured at the same time, and there is no need to perform new wiring work, and the workability is excellent. Further, by using the same information line L2 as that of the basic function module 8 and the other extended function modules 10, it is possible to easily perform interlocking control between the communication device 10a and the basic function module 8 and the other extended function modules 10. Can be expanded and has excellent extensibility.

  As shown in FIG. 22, the functional unit 25 of the basic function module 8b constituting the wall switch for turning on / off the luminaire generates the operation switch SW3 and the operation data of the operation switch SW3 and sends the operation data to the arithmetic processing unit 23. The CPU section 25a has a function of generating data to be sent via the O interface 24, and the operation section of the operation switch SW3 is exposed on the front surface of the decorative cover 8B as shown in FIG.

  Further, as shown in FIG. 23, the functional unit 35 of the extended function module 10b having a clock function generates time data of the timer unit 35f and the timer unit 35f to the arithmetic processing unit 33 via the I / O interface 34. A CPU unit 35e having a data generation function to be sent and a time display unit 35g for displaying the time based on the time data. The time display unit 35g is exposed on the front surface of the module body 10A as shown in FIG. Yes.

  In addition to the above, the basic function module 8 includes a module having an outlet function, a module having a monitor function, and a module having only a speaker function.

  In addition to the above, the extended function module 10 includes an air conditioner operation controller, an air conditioner temperature setting device, an electric razor using electric power supply, an electric toothbrush, a charger such as a portable audio player, a lighting device, and an air conditioner. And the like having remote control infrared rays. In addition to audio information, there are interphone master and slave units that have a transmission function for video captured by a surveillance camera or the like, and a video monitoring function.

  In addition, as a transmission system of the information signal of the wiring system using the functional device of the present invention, either baseband transmission or broadband transmission may be adopted and any protocol may be used. A pair of audio and video is sent to and from the master unit and slave unit based on JT-H232 packets, and one or more can be operated by operation data from the operation side in the control system. A route control protocol corresponding to unicast and broadcast capable of one-to-one or one-to-N correspondence may be employed, and is not particularly limited, and thus description thereof is omitted. Further, the protocol used between the gate devices 3 and the protocol used in the functional modules 8 and 10 connected to the gate device 3 may be made different, for example, the protocol conversion may be performed by the gate device 3.

  Thus, in using the basic function module 8 constituting the functional device, first, the gate device 3 is first attached to the switch box 2 embedded in the appropriate wall surface of the building via the mounting frame 4 and wired in advance. The power line L1 and the information line L2 are connected. Thereafter, the corresponding connected portions 7A and 7B of the connector 7 of the basic function module 8 are connected to the electric wire connection ports 6A and 6B provided on the front surface portion of the gate device 3, and the basic function module 8 is connected to the gate device. 3 is attached to the attachment frame 4 so as to cover the front surface portion of the frame 3. When the basic function module 8 is attached, the front surface portion protrudes from the wall surface, and both side surfaces are exposed to the indoor side.

  Then, the extended function module 10 is connected to one of the exposed side surfaces of the basic function module 8 by connecting the side surface of one side to the connector, and in this state, the extended function module 10 and the basic function module 8 are connected using the coupling body 100. Connect mechanically. Thereby, the basic function module 8 and the extended function module 10 constitute a functional device. At this time, the back surface of the extended function module 10 is along the side wall surface of the switch box 2. For example, when the wall surface is cross-bonded or the like, the position of the back surface of the extended function module 10 is slightly shifted. In addition, it can be disposed in a state in which the back surface is in close contact with the wall portion, and even if an operation force or the like is applied from the front surface portion of the extended function module 10, the load applied to the connection portion can be reduced.

  Further, when another extended function module 10 is connected to the previously connected extended function module 10, the extended function modules 10 are mechanically connected to each other by the connecting body 100 in a state where the opposing side surfaces are in contact with each other and are connected by connectors. In this manner, as shown in FIG. 1, the extended function modules 10 (10a, 10b...) Can be sequentially connected to the sides.

  Since the basic function module 8 can connect the extended function module 10 to both sides, the extended function module 10 may be connected to both sides of the basic function module 8. After the extended function module 10 is connected in this way, the end cover 101 is detachably attached to the side of the connection portion of the extended function module 10 or the basic function module 8 located at both ends, so that the extended function module 10 is attached. Will be completed. When the extended function module 9 is not connected to the basic function module 8, that is, when it is left unused, the end cover 101 is attached to both sides of the basic function module 8.

  The frame composed of the upper and lower sides of the decorative cover 8B of the basic function module 8, the lid 83 provided on the upper and lower sides of the extended function module 10 (including the communication device 10a), and the end cover 101 is standardized by JIS. It has substantially the same shape as the wide handle type switch plate (JIS8316), and it provides a uniform appearance with a wide handle type switch that has already been installed. Note that the shape of the frame is not limited to the shape of the wide handle type switch plate, but if the shape is substantially the same as the plate used for the large-angle continuous wiring apparatus standardized by JIS, It is possible to obtain a uniform appearance with an embedded wiring device such as the above.

  Further, the dimensions of the basic function module 8 and the extended function module 10 in the width direction and the height direction are the plate used for the large-angle continuous wiring apparatus standardized by JIS with the end covers 101 attached to both sides. The basic function module 8 and the extended function module 10 are formed to have the same dimensions, and the thickness dimensions of the basic function module 8 and the extended function module 10 are the same. Can be easily replaced.

  In addition, the number of extended function modules 10 that can be connected to the basic function module 8 is limited by the magnitude of the load applied to the connection site, and is also limited by the power supply capability of the basic function module 8.

  Here, for example, as shown in FIG. 13, the gate device of the switch box 2 provided at a high position HP such as an indoor ceiling surface among the one or a plurality of switch boxes 2 which are embedded and disposed at appropriate positions in the building. 3 is connected to a basic function module 8 having a hooking blade connecting portion 60, and the basic function module 8 is connected to an extended function module 9 provided with a human sensor 61 or the like, or a gate device 3 A basic function module 8c having only a speaker SP and having a function for BGM and the like is connected.

  A basic function module 8b constituting a wall switch for turning on / off a lighting fixture is provided in the gate device 3 of the switch box 2 provided at a height position (middle position MP) such as a wall surface recommended by a wall switch or the like. In addition, an extended function module 10b having a clock function and a communication device 10a are connected. Alternatively, the basic function module 8 including the monitor device 64 is connected to the gate device 3 of the switch box 2 in the middle position MP.

  Furthermore, a basic function module 8 having a power outlet 62 is connected to the gate device 3 of the switch box 2 provided in the vicinity of the foot including the floor (low position LP), and an extended function module constituting the foot lamp 63. Or a basic function module 8c having only a speaker SP and having a function for BGM or the like is connected to the gate device 3.

  After the installation work is completed and the system is completed as described above, information signals are exchanged between the corresponding basic function module 8 and the extended function module 10, and if the call device 10a is used, a call in another room is performed. An intercom system is configured with the apparatus 10a, and a telephone call can be made between the two, and alarm notification is performed.

  Further, in this embodiment, no special construction is required for the addition or deletion of the extended function module 10 or the basic function module 8, and therefore, only by connecting the extended function module 10 to the basic function module 8 according to general user preference, Extensibility is ensured.

  Further, in the present embodiment, the audio signal transmission device 10a is configured by housing the element portion 40a in the module main body 10A, but the element portion 40a is omitted, and the AC / DC converter 31, The communication transmission unit 32, the arithmetic processing unit 33, the I / O interface 34, the function unit 35, and the like may be housed and configured integrally. Similarly, the extended function module 10 and the basic function module 8 other than the voice information transmitting apparatus 10a can be configured integrally by omitting the element portion.

  Although the gate device 3 used in the present embodiment is attached to the switch box 2 with the attachment frame 4, it is of course possible to attach it directly to the back wall of the switch box 2 and attach the basic function module 8 to the switch box 2.

(Embodiment 2)
In the present embodiment, as the functional unit 25 of the basic function module 8, as shown in FIG. 24, the speaker SP, microphones M1 and M2, call switch SW1, alarm release switch SW2, amplifier 35a, signal processor 35h, echo cancellation The communication device 8a is provided with the units 35c and 35d and has the same function as the communication device 10a of the first embodiment. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and description is abbreviate | omitted.

  As shown in FIG. 25, the communication device 8a houses an element part 40a (see FIG. 3) in a module body 8A, and the element part 40a has an AC / DC converter 21, communication, as in the case of the basic function module 8. A transmission unit 22, an arithmetic processing unit 23, an I / O interface 24, and a function unit 25 are accommodated.

  A plurality of sound holes 8C and insertion holes 8D for exposing the call switch SW1 and the alarm release switch SW2 to the front surface are formed on the front surface of the module main body 8A facing the speaker SP and the microphones M1 and M2. It is exposed on the front side.

  The power connector 45A and the information signal connector 45B of the element section 40a are, as indicated by broken lines in FIG. 19, standardized power connector (power supply port) 9A, information connector (information transfer port) of the module body 8A. ) Electrically connected to 9B, and the power supply connection portion 45A ′ and the information signal connection portion 45B ′ are electrically connected to the standardized power connector (power supply port) 9A ′ and information connector (information exchange port) 9B ′. Connected to and configured. That is, the wiring connected to the power connectors 9A and 9A ′ and the information connectors 9B and 9B ′ from within the element portion 40a is connected via the power connection portions 45A and 45A ′ and the information signal connection portions 45B and 45B ′. It is done.

  Further, as shown in FIG. 26, on the back surface of the element section 40a, a power connection section 46A connected internally to the power connection sections 45A and 45A ′, and an information signal connection section 46B connected internally to the communication transmission section 22 The power connection portion 46A and the information signal connection portion 46B are electrically connected to the connected portion (power receiving port) 7A and the connected portion (information receiving port) 7B of the connector 7 provided on the back surface of the module body 8A. ing. That is, the wiring connected from the element part 40a to the connected part 7A and the connected part 7B is connected via the power supply connecting part 46A and the information signal connecting part 46B, respectively.

  In this way, the communication device 8a alone can be used as a basic function module. Further, if necessary, the extension function module 10 is provided on the side via the power connectors 9A and 9A ′ and the information connectors 9B and 9B ′. Can be connected. In this case, the connection port 6 including the power path connection port 6 </ b> A and the information path connection port 6 </ b> B of the gate device 3 is installed on the indoor ceiling surface, wall surface, and floor surface, and transmits at least one system wiring. The connector 7 including the connected portion 7A and the connected portion 7B of the communication device 8a is supplied with power from the first connecting portion, and is connected to the first connection portion. This corresponds to a second connection unit for exchanging information signals with the unit. Further, if an extended function module (not shown) having a predetermined function is connected to the right side or the left side of the communication device 8a, the power connectors 9A and 9A ′ and the information connectors 9B and 9B ′ of the communication device 8a are expanded functions. It corresponds to a third connection part for supplying power to the module and exchanging information signals with the extended function module.

  Therefore, the communication device 8a can simultaneously secure the power path and the information path by connecting to the power line L1 and the information line L2 that are previously wired in the same way via the gate device 3, and it is necessary to newly perform wiring work. No workability and excellent workability. Further, by using the same information line L2 as the other basic function module 8 and the extended function module 10, it is possible to easily perform the interlock control between the communication device 8a and the other basic function module 8 and the extended function module 10. Can be expanded and has excellent extensibility.

  Also in the communication device 8a of the present embodiment, the microphones M1 and M2 are disposed at different positions from the speaker SP as in the first embodiment, and narrow in the same direction as the sound output from the speaker SP. Has directional characteristics of the corners. Therefore, howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP can be prevented. Further, since it is not necessary to increase the distance between the speaker SP and the microphones M1 and M2, the communication device 10a can be reduced in size and formed to have the same size as the other basic function module 8 and the extended function module 10. Even if the wiring system is used as one form of a functional device, a sense of unity as a system can be obtained.

  Further, in the present embodiment, the voice information transmission device 8a is configured by housing the element portion 40a in the module body 8A, but the element portion 40a is omitted, and the AC / DC converter 21, The communication transmission unit 22, the arithmetic processing unit 23, the I / O interface 24, the function unit 25, and the like may be housed and configured integrally. Similarly, the basic function module 8 and the extended function module 10 other than the voice information transmission device 8a can be configured integrally by omitting the element portion.

(Embodiment 3)
In the first and second embodiments, a power path and an information path are established by connector connection between the gate device 3, the basic function module 8 (including the call device 8a), and the extended function module 10 (including the call device 10a). ing.

  However, in this embodiment, the power path is configured by supplying electric power in a non-contact manner by magnetic coupling instead of connector connection. Specifically, the gate device 3, the basic function module 8, and the extended function module 10 each have a configuration in which a coil is wound around a core instead of a connector, and the cores are magnetically coupled to each other so that the other coil has a low pressure. AC power supply voltage is induced to supply power. Here, by applying an AC power supply having a frequency higher than the commercial frequency to the coil, the transformer configuration by the electromagnetic coupling portion can be reduced in size.

  Further, in the gate device 3, the basic function module 8, and the extended function module 10, an information signal is sent out through E / O conversion, and an information signal is taken in through O / E conversion, whereby an information signal composed of an optical signal is emitted as a light emitting element. Thus, an information path that can be transmitted bidirectionally without contact using the light receiving element is constructed.

(Embodiment 4)
In the first to third embodiments, power (power supply) transmission and information signal delivery are performed in separate systems. However, in this embodiment, the information signal transmission method of the entire system is performed on the power line carrier, thereby The road and information path are shared.

  In other words, the preceding wiring in each switch box 2 is only the power line L1, and the connection port of the gate device 3 corresponding to this is only the power path connection port 6A of the connection port shown in FIG. 14, and the corresponding basic function module 8 The connector 7 (including the communication device 8a) also has only a connected port 7A corresponding to the power path connecting port 6A, and the information connectors 9B and 9B ′ are also omitted. Further, the extended function module 10 (including the communication device 10a) also omits the information connectors 11B and 11B '.

  As shown in FIG. 27, in the communication device 10a, the information signal received by the power line carrier and the PLC modem unit 36 for transmitting the information signal and the information signal received through the PLC modem unit 36 are received. Are provided between the arithmetic processing unit 33, the functional unit 35, and the functional unit 35 and the arithmetic processing unit 33 for performing data processing of the above and generating data of an information signal transmitted by the power line carrier via the PLC modem unit 36. An I / O interface 34 is provided. The arithmetic processing unit 33, the I / O interface 34, and the function unit 35 have the same functions as those in the first to third embodiments.

  Further, the same configuration as the PLC modem unit 36 is also provided in the gate device 3, the basic function module 8, and the extended function module 10.

  The power line carrier modulation scheme employed in this embodiment may be any of various schemes such as a broadband spread spectrum scheme, a multi-carrier scheme, and an OFDM scheme, and is not particularly described here.

  Thus, in this embodiment, since the power path and the information path are common, the connection port in the gate device 3 is only the power path connection port 6A, and the connector 7 of the basic function module 8 is also one connected portion 7A. Thus, the connector 11 of the extended function module 10 also has only one connected portion 11A, so that the space around the connection is reduced. In addition, the internal circuit of the basic function module 8 or the extended function module 10 does not require the configuration of a communication transmission unit or an information connector, so that the arrangement space in the thin module bodies 8A and 10A can be increased.

  In addition, since a PLC modem part is built in the lighting equipment and air conditioning equipment, it is possible to send information signals directly to the lighting equipment and air conditioning equipment, so it is necessary to provide a function module with an infrared remote control signal transmission function for remote control. Disappears.

FIG. 3 is a partially broken perspective view showing an arrangement state of a wiring system using the communication device according to the first embodiment. It is a perspective view which shows a communication apparatus same as the above. It is a perspective view which shows an element part same as the above. It is a circuit block diagram of a communication apparatus same as the above. It is a figure which shows the directivity of the microphone same as the above. (A) (b) It is a block diagram of the acoustic signal-electrical signal conversion part of a microphone same as the above. It is a circuit block diagram of a microphone same as the above. It is a circuit block diagram of a signal processing part same as the above. (A) (b) It is a signal waveform diagram of a signal processing part same as the above. (A) (b) It is a signal waveform diagram of a signal processing part same as the above. (A) (b) It is a signal waveform diagram of a signal processing part same as the above. (A)-(c) It is a signal waveform diagram of the signal processing part same as the above. It is a block diagram of the wiring system using the call apparatus same as the above. It is a front view of the state which attached the gate apparatus same as the above to the attachment frame. It is a perspective view which shows the wiring form to the gate apparatus same as the above. It is a perspective view of the state which removed the basic functional module same as the above from the switch box. (A) is a perspective view of the basic functional module same as above with the decorative cover removed, and (b) is a perspective view of the coupling body. It is explanatory drawing of the connection structure of a basic function module same as the above and an expansion module. It is a circuit block diagram of a basic functional module same as the above. It is a circuit block diagram of an extended function module same as the above. The extended function module same as the above is shown, (a) is a front view, (b) is a side view, and (c) is a side view in a state where a lid is opened and a coupling body is removed. It is a circuit block diagram of the function part of the basic function module which comprises a wall switch same as the above. It is a circuit block diagram of the function part of the extended function module which has a clock function same as the above. FIG. 3 is a circuit configuration diagram of a functional unit of a communication device according to a second embodiment. It is a perspective view which shows the arrangement | positioning state of the wiring system using the communication apparatus same as the above. It is a rear view which shows an element part same as the above. FIG. 6 is a circuit configuration diagram of a communication device according to a fourth embodiment.

Explanation of symbols

L1 Power line L2 Information line 3 Gate device 8b Basic function module 10a Communication device 11A Power connector 11B Information connector SP Speaker M1, M2 Microphone

Claims (9)

Connected directly to a first connection portion that is installed on an indoor ceiling surface, wall surface, floor surface and electrically connected to at least one system wiring for transmitting power and information signals, and receives power supply; A second connection unit for transmitting and receiving an information signal to and from the first connection unit, a speaker for outputting audio information transmitted through the second connection unit, and a second connection unit A plurality of microphones for transmitting audio information, each of the microphones has directivity so as not to pick up the sound output from the speaker, and the distance from the speaker is at least one of the other microphones A telephone device characterized by being different. The call device according to claim 1, wherein the plurality of microphones have directivity in the same direction as an output direction of the speaker. 3. The communication device according to claim 1, wherein each of the microphones is a capacitor type silicon microphone. The first connection unit is mechanically coupled to a functional device having a predetermined function, and the second connection unit is supplied with power from the functional device and exchanges information signals with the functional device. The call device according to any one of claims 1 to 3, wherein The second connection portion is provided on one side surface of the device, supplies power to another functional device mechanically coupled to the other side surface of the device, and transmits / receives information signals to / from the other functional device. The communication device according to claim 4, further comprising a third connection portion on the other side of the device. 6. The communication device according to claim 5, wherein the second and third connection portions have a fixed shape corresponding to the stylization of the arrangement and shape of the first connection portions. It is mechanically connected to a gate device including the first connection unit, and the second connection unit receives power from the gate device and transmits / receives an information signal to / from the gate device. The communication device according to any one of claims 1 to 3. A power supply is supplied to a functional device having a predetermined function and mechanically coupled to a side surface of the device, and a third connection portion for exchanging information signals with the functional device is provided on at least one side surface. The call device according to claim 7. The communication device according to claim 7 or 8, wherein the second connection portion has a fixed shape corresponding to the stylization of the arrangement and shape of the first connection portion.

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