JP4640210B2 - Telephone device - Google Patents

Description

  The present invention relates to a call device.

  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 shown in FIGS. 27 (a) and 27 (b), in a communication device A ′ having a speaker SP and a pair of microphones M1 and M2, this corresponds to a difference in distance between the microphones M1 and M2 and the speaker SP. A delay circuit that delays the output of the microphone M1 closer to the speaker SP by the delay time of the sound wave, and a level adjustment corresponding to the difference between the distances between the two microphones M1 and M2 and the speaker SP are performed to both A level adjustment amplifier circuit for matching the output levels of the microphones M1 and M2 and a differential amplifier circuit using both outputs of the microphones M1 and M2 passing through the delay circuit and the level adjustment amplifier circuit as inputs are provided. A communication device using the output of the circuit as a transmission signal has been proposed.

In this communication device A ′, after the sound from the speaker SP is picked up by both microphones M1 and M2, delay and level adjustment are performed, and the sound component from the speaker SP input to both microphones M1 and M2 is differentially amplified. By canceling out, the sound component from the speaker SP is removed (cancelling processing) to prevent howling. (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)

  In the above conventional communication device A ′, the distances X1 and X2 from the center of the speaker SP to the centers of the microphones M1 and M2 are X1 <X2.

  Further, since the microphones M1 and M2 are on the same plane in front of the casing A1 ′ of the communication device A ′, the distance Z1 from the speaker H existing in front of the communication device A ′ to the centers of the microphones M1 and M2. , Z2 change depending on the position of the speaker H, and depending on the position of the speaker H, a state where Z1 <Z2 occurs.

  When Z1 <Z2, for sound from the speaker SP, the sound wave delay time corresponding to the difference (X2-X1) in the distance between the microphones M1, M2 and the speaker SP [Tdx = (X2-X1) / Vs] (Vs is the speed of sound), the phase of the sound component Y201s from the speaker SP included in the output of the microphone M2 is delayed compared to the sound component Y101s from the speaker SP included in the output of the microphone M1 (FIG. 28). reference).

  In addition, for the sound uttered by the speaker H, the sound wave delay time [Tdz = (Z2−Z1) / Vs] corresponding to the difference in distance between the microphones M1 and M2 and the speaker H (Z2−Z1). The phase of the voice component Y201h from the speaker H included in the output of the microphone M2 is delayed by (Vs is the speed of sound) compared to the voice component Y101h from the speaker H included in the output of the microphone M1 (see FIG. 28). ).

  When the output of the microphone M1 closer to the speaker SP is delayed by the delay time Tdx by the delay circuit described above, the sound components Y101s and Y101h become the sound components Y102s and Y102h after the delay (see FIG. 29).

  The audio component Y102s after the delay from the speaker SP has the same phase as the audio component Y201s from the speaker SP, and the audio component from the speaker SP can be reduced by performing the canceling process with the above-described differential circuit.

  The phase of the delayed speech component Y102h from the speaker H is delayed by the delay time [Ta2 = Tdx−Tdz] as compared to the speech component Y201h from the speaker H. However, depending on the position of the speaker H, the delay time Tdz increases, the delay time Ta2 becomes a minute time, and the speech components Y102h and Y201h from the speaker H may be substantially in phase. Then, when the cancellation process is performed by the above-described differential circuit, not only the sound component from the speaker SP but also the sound component from the speaker H is reduced. That is, in the audio signal after performing the canceling process, the relative difference between the audio component from the speaker H to be retained and the audio component from the speaker SP to be reduced becomes small.

  As a result, when the speech component from the speaker H is amplified to a sufficient level, the speech component from the speaker SP is also amplified, resulting in howling.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a communication device that can reliably prevent occurrence of howling.

The invention of claim 1 includes a speaker for outputting audio information transmitted through the wiring, it collects sound one or more first outputs an audio signal of the microphone and one or more second A main body containing a microphone and a signal processing unit that processes each audio signal output from the first and second microphones and transmits the signal through a wiring; and a distance between the first microphone and the speaker is , Shorter than the distance between the second microphone and the speaker, so that the distance between the first microphone and the sound source outside the apparatus is longer than the distance between the second microphone and the sound source outside the apparatus, The first microphone is disposed on the inner side of the main body facing the diaphragm of the speaker, and the second microphone is the main body on which the first microphone is disposed. The first and second microphones are arranged in parallel in the output direction of the speaker so as to face the center of the diaphragm of the speaker, and the first microphone is the second microphone. Further, the signal processing unit is arranged on the diaphragm side of the speaker, and the signal processing unit generates an audio signal in which the sound emitted from the speaker is reduced based on the audio signals of the first and second microphones. To do.

According to the present invention, for the sound from the speaker, the phase of the sound component output from the second microphone is delayed compared to the sound component output from the first microphone, and the sound generated by the sound source outside the apparatus is emitted. Since the phase of the audio component output from the first microphone is delayed compared to the audio component output from the second microphone, the audio signal generated by the signal processing unit is It is possible to increase the relative difference from the sound component from the speaker to be reduced. Therefore, the voice component from the speaker can be reduced without reducing the transmitted voice to be kept from the voice signal to be transmitted as much as possible, and howling can be reliably prevented. In addition, the phase of the sound emitted from the speaker can be accurately detected.

  According to a second aspect of the present invention, in the first aspect, the signal processing unit performs level adjustment corresponding to a difference in distance between the first and second microphones and the speaker to perform the first adjustment on the sound from the speaker. , The level adjusting means for matching the output levels of the second microphone, and the speaker by delaying the audio signal according to the transmission time of the sound wave corresponding to the difference in distance between the first and second microphones and the speaker. A difference between the delay means for matching the phases of the sound signals of the first and second microphones with the sound from the sound, and the difference between the sound signals of the first and second microphones that have passed through the level adjustment means and the delay means. Moving means.

  According to the present invention, the sound component from the speaker included in the transmitted sound signal is canceled out, and the sound component from the sound source outside the apparatus remains in a state of maintaining a sufficient amplitude. The relative difference between the component and the sound component from the speaker to be reduced increases. Therefore, the voice component from the speaker can be reduced without reducing the transmitted voice to be kept from the voice signal to be transmitted as much as possible, and howling can be reliably prevented.

According to a third aspect of the present invention, in the first or second aspect, the first microphone is disposed with a highly sensitive sound collection surface facing the diaphragm of the speaker, and the second microphone is a highly sensitive collection device. The sound surface is arranged facing a sound source outside the apparatus.

  According to the present invention, the amplitude difference between the output of the first microphone and the output of the second microphone becomes large, and in the output of the signal processing unit, the sound component from the sound source that is desired to remain and the sound component from the speaker that is desired to be reduced. The relative difference between and becomes even greater.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the main body is installed on an indoor ceiling surface, wall surface, or floor surface and is electrically connected to at least one line of wiring for transmitting power and information signals. A second connection part for electrically connecting to the first connection part, receiving power supply, and transmitting / receiving an information signal to / from the first connection part; The voice information transmitted through the connection unit is output, and the microphone transmits the voice information through the signal processing unit and the second connection unit, thereby stylizing the arrangement and shape of the first connection unit. Corresponding to the above, the shape of the second connecting portion is fixed.

  According to this invention, if the second connection unit is electrically connected to the first connection unit, it is possible to secure a power path and an information path at the same time, and it is not necessary to newly perform wiring work. Workability can be obtained.

As described above, according to the present invention, it is possible to reduce the sound component from the speaker without reducing as much as possible the transmitted voice to be retained from the transmitted audio signal, and to reliably prevent the occurrence of howling. There is. In addition, the phase of the sound emitted from the speaker can be accurately detected.

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

(Embodiment 1)
The communication device A of this embodiment is shown in FIGS. 1 to 3, and a speaker SP, a microphone M1 (first microphone), a microphone M2 (second microphone), and a call switch SW1 are provided in a housing (main body) A1. , A communication unit 35a, echo cancellation units 35b and 35c, an amplification unit 35d, and a signal processing unit 35e. A voice signal transmitted from the communication device A installed in another room or the like via the information line L2 is received by the communication unit 35a, amplified by the amplification unit 35d via the echo cancellation unit 35b, and then the speaker. Output from SP. Further, by operating the call switch SW1, a call can be made, and each audio signal input from the microphones M1, M2 is subjected to signal processing to be described later in the signal processing unit 35e, and then passes through the echo cancellation unit 35c. The data is transmitted from the communication unit 35a to the communication device A installed in another room or the like via the information line L2. That is, it functions as an intercom capable of two-way calls between rooms. Note that the power of the communication device A may be supplied from an outlet provided in the vicinity of the installation place or may be supplied via the information line L2.

  Hereinafter, the configuration of the speaker SP will be described. As shown in FIGS. 1 (a) and 1 (b), the speaker SP is formed of an iron-based material having a thickness of about 0.8 mm, such as cold-rolled steel plate (SPCC, SPKEN), electromagnetic soft iron (SUY), and has one end opened. The circular support body 72 is provided so as to extend outward from the open end of the yoke 70, and a cylindrical support section 72 a is formed on the outer edge of the support body 72. ing.

  A cylindrical permanent magnet 71 (for example, residual magnetic flux density of 1.39T to 1.43T) formed of neodymium is disposed in the cylinder of the yoke 70, and a dome-shaped diaphragm 73 is provided on the end surface of the support portion 72a. It has been. That is, the outer peripheral edge of the diaphragm 73 is fixed to the end surface of the support portion 72a.

  The diaphragm 73 is formed of a thermoplastic plastic (for example, a thickness of 12 μm to 35 μm) such as PET (PolyEthylene Terephthalate) or PEI (Polyetherimide). A cylindrical bobbin 74 is fixed to the rear surface of the diaphragm 73, and the rear end of the bobbin 74 is formed by winding a polyurethane copper wire (for example, φ0.05 mm) around a paper tube of kraft paper. A voice coil 75 is provided. The bobbin 74 and the voice coil 75 are provided so that the voice coil 75 is positioned at the opening end of the yoke 70, and freely move in the front-rear direction near the opening end of the yoke 70.

  When an audio signal is input to the polyurethane copper wire of the voice coil 75, an electromagnetic force is generated in the voice coil 75 due to the current of the audio signal and the magnetic field of the permanent magnet 71, so that the bobbin 74 is moved back and forth with the diaphragm 73. Visible in the direction. At this time, a sound corresponding to the audio signal is emitted from the diaphragm 73. That is, an electrodynamic speaker SP is formed (for example, a diameter of 20 to 25 mm and a thickness of about 4.5 mm).

  A rib 14 having an L-shaped cross-section is formed in an annular shape inside the front surface of the housing A1 facing the diaphragm 73 of the speaker SP, and from the outer peripheral end of the circular support 72 of the speaker SP to the front side. The protruding end surface of the projecting portion 72b contacts the mounting portion 14a of the rib 14, the outer surface of the projecting portion 72b is fitted to the inner surface of the projecting portion 14b of the rib 14, and the diaphragm 73 is placed on the front surface of the housing A1. The speaker SP is positioned in a state of facing from the inside. Moreover, the outer edge part of the support body 72 is formed in a circular shape and the rib 14 is formed in an annular shape, so that the speaker SP can be easily mounted on the housing A1.

  The speaker SP positioned by the rib 14 is attached to the inside of the front surface of the housing A1 by fastening a mounting screw (not shown) to a screw hole (not shown) inside the front surface of the housing A1. .

  Next, the microphones M1 and M2 have directivity that is higher in sensitivity in one direction than that in the other direction, and configuration examples of the microphones M1 and M2 having directivity are 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. A lower electrode 51 made of a silicon substrate formed on the substrate 57, a vibration part 53c (sound collecting surface), and support parts 53b extending at four positions on the outer periphery of the vibration part 53c, are formed by a polysilicon film. An upper electrode 53 to be formed, a cavity 54 a formed between the lower electrode 51 and the upper electrode 53, and an insulating layer 52 made of a SiN film disposed between the lower electrode 51 and the upper electrode 53. Has been. 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. 5 and output to the signal processing unit 35e as an audio signal. In FIG. 5, 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 operating power source + V (for example, 5V) into a constant voltage Vr (for example, 12V). In the microphone M1, a resistor R11 and an acoustic signal-electric signal conversion are provided. The constant voltage Vr is applied to the series circuit with the part Cm1, and the connection midpoint between the resistor R11 and the acoustic signal-electric signal conversion part Cm1 is connected to the gate terminal of the junction type J-FET element S11 via the capacitor C11. The 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 35e 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 35e as an audio signal.

  As shown in FIG. 4B, the lower electrode 51 facing substantially the center of the vibrating portion 53c and the insertion hole 56 are provided in the substrate 57 to allow the cavity 54a to communicate with the outside, and the rear (lower electrode 51). Sound signal (indirect sound) reaching the front surface of the vibrating portion 53c from the front side (upper electrode 53 side) to the front surface of the vibrating portion 53c from the rear via the insertion hole 56 (direct sound). The 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 higher directivity in one direction (vibration portion 53c side) than in other directions.

  As shown in FIGS. 1A and 1B, the microphone M1 is vibrated by a rectangular frame-shaped rib 15 provided facing the center of the diaphragm 73 of the speaker SP inside the front surface of the housing A1. The portion 53c is positioned so as to face the diaphragm 73 of the speaker SP.

  The microphone M2 is positioned outside the front surface of the housing A1 by a rectangular frame-shaped rib 16 provided to face the center of the diaphragm 73 of the speaker SP so that the vibrating portion 53c faces forward. As described above, by arranging the microphones M1 and M2 so as to face the diaphragm 73 of the speaker SP, the phase of the sound emitted by the speaker SP can be accurately detected, and the size of the communication device A can be reduced. .

  A plurality of sound holes B are formed in the front surface of the housing A1 facing the speaker SP and the microphones M1 and M2.

  And in this embodiment, in order to prevent the howling which generate | occur | produces when the microphones M1 and M2 pick up the audio | voice output of the speaker SP, it has the following structures.

  First, as shown in FIG. 6, if the distances from the center of the speaker SP to the centers of the microphones M1 and M2 are X1 and X2, respectively, X1 <X2.

  Further, the microphones M1 and M2 are arranged side by side in the front-rear direction (the output direction of the speaker SP) on the front side of the housing A1 so that the microphone M2 is located at the front and the microphone M1 is located at the rear. If the distances from the existing speaker H to the centers of the microphones M1 and M2 are Z1 and Z2, respectively, Z1> Z2 is always satisfied regardless of where the speaker H is in front of the communication device A (the communication device A has (Speaker H who makes a phone call normally is located in front of call device A facing speaker SP and microphones M1 and M2).

  Then, as shown in FIG. 7, the signal processing unit 35e converts an analog output of the microphone M1 into a digital signal, and an audio band (300 to 4000 Hz) from the output of the A / D conversion unit 350. A bandpass filter 351 that removes noise of other frequencies, an attenuation unit 352 that attenuates the output of the bandpass filter 351, a delay circuit 353 that delays the output of the attenuation unit 352, and an analog output of the microphone M2 as a digital signal. An A / D conversion unit 354 for conversion, a band pass filter 355 for removing noise of a frequency other than the voice band from the output of the A / D conversion unit 354, an output of the delay circuit 353 by inverting the output of the band pass filter 355 And the output of the adder circuit 356 from a digital signal to an analog signal And a D / A conversion circuit 357 for conversion.

  8 to 10 show audio signal waveforms of respective parts of the signal processing unit 35e. The outputs of the A / D converters 350 and 354, the bandpass filters 351 and 355, the attenuator 352, the delay circuit 353, and the adder 356 are digital signals. Indicates an analog waveform.

  First, in the microphone M1, the vibration part 53c is mounted toward the speaker SP, and the sound emitted by the speaker SP is more sensitive than the sound (sent voice) emitted by the speaker H located in front of the communication device A. Collect sound. On the other hand, the microphone M2 has the vibrating portion 53c arranged forward, and collects sound emitted by the speaker H located in front of the communication device A with higher sensitivity than the sound emitted by the speaker SP.

  That is, at the output Y11 of the microphone M1, the amplitude of the speech component Y11s emitted by the speaker SP is increased, but the amplitude of the speech component Y11h emitted by the speaker H is decreased. In the output Y21 of the microphone M2, the amplitude of the voice component Y21h emitted by the speaker H is increased, but the amplitude of the voice component Y21s emitted by the speaker SP is reduced (see FIG. 8).

  At the time of transmission, both the sound emitted by the speaker H and the sound emitted by the speaker SP are collected by the microphones M1 and M2. First, for the sound from the speaker SP, since the distances X1 and X2 from the center of the speaker SP to the centers of the microphones M1 and M2 are X1 <X2, the distance between the microphones M1 and M2 and the speaker SP is The sound component output by the microphone M2 is compared with the sound component Y11s output by the microphone M1 by the delay time [Tdx = (X2-X1) / Vs] (Vs is the speed of sound) of the sound wave corresponding to the difference (X2-X1). The phase of Y21s is delayed (see FIG. 8).

  In addition, for the sound uttered by the speaker H, the sound wave delay time [Tdz = (Z1−Z2) / Vs] corresponding to the distance difference (Z1−Z2) between the microphones M1 and M2 and the speaker H. The phase of the sound component Y11h output from the microphone M1 is delayed as compared with the sound component Y21h output from the microphone M2 (see FIG. 8).

  The audio signals collected by the microphones M1 and M2 as described above are digitally converted by the A / D converters 350 and 354, and then generated as outputs Y12 and Y22 from which noise is removed by the bandpass filters 351 and 355. The

  Next, the attenuating unit 352 attenuates the output Y12 and performs level adjustment corresponding to the distance difference (X2-X1) between the two microphones M1, M2 and the speaker SP, and the speaker included in the output Y13 of the attenuating unit 352. The amplitude of the audio component Y13s from the SP is matched with the amplitude of the audio component Y22s from the speaker SP included in the output Y22.

  Next, the delay circuit 353 is composed of a time delay element or a CR phase delay circuit, and the speaker SP included in the output Y14 of the delay circuit 353 is delayed by delaying the output Y13 of the attenuation unit 352 by the delay time Tdx. Is matched with the phase of the audio component Y22s from the speaker SP included in the output Y22 (see FIG. 9).

  Next, the adder circuit 356 adds the signal Y23 obtained by inverting the output Y22 of the bandpass filter 355 to the output Y14 of the delay circuit 353 (see FIG. 10A), whereby the output Y14 and the output Y23 are obtained. A differential means for outputting the difference is configured, and an output Ya in which the sound component from the speaker SP is canceled is generated (see FIG. 10B). The D / A conversion circuit 357 outputs an audio signal obtained by analog conversion of the output Ya.

  Here, the audio component Y14s from the speaker SP included in the output Y14 and the audio component Y22s from the speaker SP included in the output Y22 have the same amplitude and the same phase by the attenuation process and the delay process (FIG. 9). ) And cancel each other out by the above addition process. That is, in the output Ya, the sound component from the speaker SP is reduced.

  On the other hand, for the sound uttered by the speaker H in front of the microphones M1 and M2, the amplitude of the sound component Y21h output from the microphone M2 in which the vibration part 53c is arranged toward the speaker H is the vibration part 53c to the speaker SP. The amplitude of the sound component Y11h output from the microphone M1 disposed toward the head is larger (see FIG. 8). Further, since the signal from the microphone M1 is attenuated by the attenuating unit 352, the speech component Y22h from the speaker H included in the output Y22 becomes larger than the speech component Y14h from the speaker H included in the output Y14 (FIG. 9). That is, the amplitude difference between the speech component Y14h from the speaker H included in the output Y14 and the speech component Y22h from the speaker H included in the output Y22 becomes large, and the addition circuit 356 performs the above addition process. In the output Ya, a signal corresponding to the voice uttered by the speaker H remains with a sufficient amplitude maintained.

  Further, the delayed audio component Y14h is delayed in phase by the delay time [Ta1 = Tdx + Tdz] compared to the audio component Y22h, and compared with the delay time [Ta2 = Tdx−Tdz] of the conventional example. As a result, the delay time increases and the phase difference between the audio components Y14h and Y22h increases. Therefore, the canceling effect by the addition process is reduced, and a signal corresponding to the voice uttered by the speaker H remains in the output Ya with a sufficient amplitude maintained. Note that the delay time Ta1 is in units of μsec, and the deviation in units of μsec cannot be identified by the ear of the person who is called. That is, there is no problem as an audio signal transmitted to the human ear.

  As described above, the sound component from the speaker SP is reduced at the output Ya of the adder circuit 356, and the sound component emitted from the speaker H in front of the communication device A toward the microphones M1 and M2 remains, and the output Ya Then, the relative difference between the speech component from the speaker H to be kept and the speech component from the speaker SP to be reduced becomes large. That is, even when the sound from the speaker H and the sound from the speaker SP are generated at the same time, only the sound component from the speaker SP is reduced while maintaining a sufficient amplitude for the sound component from the speaker H. Therefore, howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP can be prevented.

  Next, the audio signal output from the D / A conversion circuit 357 is output to the echo cancellation unit 35c, and the echo cancellation units 35b and 35c (see FIG. 3) perform the following processing to further prevent howling. .

  First, the echo canceling unit 35c captures the output of the echo canceling unit 35b as a reference signal, and performs an operation on the output of the signal processing unit 35e, thereby further processing the audio signal that has passed from the speaker SP to the microphones M1 and M2. Cancel. On the other hand, the echo canceling unit 35b also captures the output of the echo canceling unit 35c as a reference signal and performs an operation on the output of the communication unit 35a, so that the audio signal wraps around from the speaker to the microphone on the other party side Cancel.

  Specifically, the echo cancellation units 35b and 35c include a speaker SP-microphone M1, M2-signal processing unit 35e-echo cancellation unit 35c-communication unit 35a-echo cancellation unit 35b-amplification unit 35d-speaker SP. By adjusting the amount of loss in a variable loss means (not shown) provided in the loop circuit, the loop gain is set to 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.

  Here, the microphones M1 and M2 and the signal processing unit 35e are electrically connected through a conductive pattern PT formed on the inner side of the front surface of the housing A1 using a MID (Molded Interconnection Device) molding substrate technique. Therefore, the conductor pattern PT can be accurately formed. Further, separate power supply lines and signal lines are not required, and the structure can be simplified.

  In the present embodiment, both the microphones M1 and M2 are disposed at a position facing the diaphragm 73 of the speaker SP. However, the front surface of the housing A1 is positioned so that the microphone M2 is located at the front and the microphone M1 is located at the rear. If they are arranged side by side in the front-rear direction, they may be arranged at locations that do not face the diaphragm 73 of the speaker SP.

  Note that the number of the microphones M1 and M2 is not limited to one each, and a plurality of microphones according to the situation may be arranged to perform the same processing as described above.

(Embodiment 2)
This embodiment is different from the first embodiment in the front structure of the casing A1 of the communication device A and the arrangement of the microphone M2, and will be described below with reference to FIGS. 11 (a) and 11 (b).

  The casing A1 of the communication device A has a double front structure, and includes a first front surface A10 and a second front surface A11 provided in front of the front surface A10.

  The speaker SP and the microphone M1 are arranged on the first front surface A10 as in the first embodiment.

  The microphone M2 is positioned on the inner side of the second front surface A11 by a rectangular frame-shaped rib 16 provided facing the center of the diaphragm 73 of the speaker SP so that the vibrating portion 53c faces forward. A plurality of sound holes B are also formed in the second front surface A11.

  As described above, the microphones M1 and M2 are arranged side by side in the front-rear direction (the output direction of the speaker SP) on the front surface side of the housing A1 so that the microphone M2 is located at the front and the microphone M1 is located at the rear. If the distances from the center to the centers of the microphones M1 and M2 are X1 and X2, respectively, X1 <X2, and the distance from the speaker H existing in front of the communication device A to the centers of the microphones M1 and M2 is Z1, respectively. Assuming Z2, wherever the speaker H is in front of the communication device A, Z1> Z2 is always satisfied.

  Therefore, as in the first embodiment, the sound component from the speaker SP is reduced at the output Ya of the adder circuit 356, and the sound component emitted from the speaker H in front of the communication device A toward the microphones M1 and M2 remains. In the output Ya, the relative difference between the speech component from the speaker H to be retained and the speech component from the speaker SP to be reduced increases. That is, even when the sound from the speaker H and the sound from the speaker SP are generated at the same time, only the sound component from the speaker SP is reduced while maintaining a sufficient amplitude for the sound component from the speaker H. Therefore, howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP can be prevented.

  Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

(Embodiment 3)
An example of a wiring system using the communication device of the present invention will be described below.

  First, as shown in FIG. 12, one or a plurality of switch boxes 2 embedded and arranged at appropriate positions in a building are provided, and a power line L1 and an information line L2 previously wired in the wall surface between the switch boxes 2 are provided. In addition to feed wiring, the power line L1 drawn indoors through the main breaker MB and branch breaker BB in the wiring board 1 is introduced to the switch box 2 at the start, and the gateway is connected to the external Internet network NT. An information line L2 connected through a GW (router and hub built-in) is introduced. 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 in accordance with a series of mounting frames 4 (see FIG. 13) to which three large-sized rectangular single-module embedded wiring devices standardized by JIS, for example, can be mounted. As shown in FIG. 21, the power line L1 and the information line L2 sent from the wiring board 1 or other switch box 2 are introduced from the upper part as shown in FIG. 21, 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. 13, the mounting frame 4 is provided with a window hole 4a for mounting an instrument in the center. 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. 14, 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 wiring 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. 15 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 is a flat module body made of synthetic resin (non-crystalline general-purpose plastic such as ABS) shown in FIGS. 15 and 16A. The circuit shown in FIG. 18 is built in 8A, and 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 obtained. In addition, the mounting flange (not shown) is attached to the front surface of the mounting hole 80 which is perforated in the center of the upper portion and the lower portion. It is attached to the switch box 2 via the attachment frame 4 by being inserted from the part side and screwed into a screw hole 4 c provided in the upper and lower frames of the attachment frame 4.

  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. 16A, 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. 16B is fitted into the coupling groove 81 on the left or right side of the partition wall 82 until it hits the partition wall 82, and the other half of the coupling body 100 is shown in FIG. As shown in FIG. 17, the basic function module 8 and the extended function module 10 can be mechanically coupled by being fitted 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 of 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 the basic function module 8 as shown in FIG. Standardized to an integral multiple of the unit module dimensions.

  Also, a male power connector 11A and an information connector 11B are provided on one side of both sides of the flat module body 10A made of synthetic resin (amorphous general-purpose plastic such as ABS), and a female power source is provided on the other side. Connector 11A 'and information connector 11B' are 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 attached or removed, and is closed as described above when the attached state of the connecting body 100 is maintained (FIG. 20 (c). )reference).

  Next, the call device 10a of this embodiment which is one form of the extended function module 10 will be described. As shown in FIGS. 22 and 23, the call device 10 a includes an AC / DC converter 31, a communication transmission unit 32, an arithmetic processing unit 33, an I / O interface 34, and a functional unit 35 in the same manner as the extended function module 10. The module main body 10A is housed in a main body 10A. One side of the both sides of the module main body 10A has a male power connector 11A and an information connector 11B, and the other side has a female power connector 11A 'and an information connector 11B'. Provided.

  A plurality of sound holes 10B are formed in the front surface of the module main body 10A, and the call switch SW1 and the alarm release switch SW2 are exposed on the front surface.

  In the module main body 10A, as shown in FIG. 23, as a function unit 35, a speaker SP, a microphone M1 (first microphone), a microphone M2 (second microphone), a call switch SW1, an alarm release switch SW2, and a communication unit 35a, echo cancellation units 35b and 35c, amplification unit 35d, and signal processing unit 35e, which have the same functions as those of the communication device A of the first embodiment, and the arrangement of the speakers SP and microphones M1 and M2 is the same as that of the first embodiment. Thus, howling that occurs when the microphones M1 and M2 pick up the sound output of the speaker SP is prevented.

  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.

  Then, as shown in FIG. 21, for example, the basic function module 8b constituting the wall switch for turning on / off the lighting fixture by exposing the operation portion of the operation switch SW3 to the front surface of the decorative cover 8B is connected to the gate device 3, An extended function module 10b having a clock function with the time display unit 35g exposed on the front surface of the module main body 10A is connected to the right side of the basic function module 8b, and the call device 10a is connected to the right side of the extended function module 10b. By connecting, an intercom function can be added to various functional devices such as a wall switch function and a clock function. 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.

  Next, the communication device 8a of this embodiment, which is one form of the basic function module 8, will be described. As the functional unit 25 of the basic function module 8, as shown in FIGS. 24 and 25, the speaker SP, the microphone M1 (first microphone), the microphone M2 (second microphone), the call switch SW1, the alarm release switch SW2, If the communication unit 35a, the echo cancellation units 35b and 35c, the amplification unit 35d, and the signal processing unit 35e are provided, a call device 8a having the same function as the above-described call device 10a is configured.

  A plurality of sound holes 8C are formed on the front surface of the module main body 8A, and the call switch SW1 and the alarm release switch SW2 are exposed on the front surface.

  The communication device 8a can be used alone as a basic function module. Further, if necessary, the extended function module 10 is connected to the side via the power connectors 9A and 9A ′ and the information connectors 9B and 9B ′. do it. 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.

  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 way, as shown in FIG. 21, 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. 12, the gate device of the switch box 2 provided in the high position HP such as the 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, an information signal is exchanged between the corresponding basic function module 8 and the extended function module 10, and if it is the communication device 8a or 10a, another room is provided. The intercom system is configured with the communication devices 8a and 10a, and the communication between the two devices is enabled 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.

  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 4)
In the third embodiment, a power path and an information path are established by connector connection between the gate device 3, the basic function module 8 (including the communication device 8a), and the extended function module 10 (including the communication device 10a). .

  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 5)
In the third and fourth embodiments, power (power supply) transmission and information signal delivery are performed in separate systems. However, in this embodiment, the information signal transmission method for the entire system is performed on the power line carrier. The road and information path are shared.

  That is, the preceding wiring in each switch box 2 is only the power line L1, and the connection port of the gate device 3 is only the power path connection port 6A of the connection port shown in FIG. 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. 26, 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, I / O interface 34, and function unit 35 have the same functions as those in the third and fourth 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.

(A) (b) It is sectional drawing which shows the attachment state of the speaker of the telephone apparatus of Embodiment 1, and a microphone. It is a schematic perspective view same as the above. It is a circuit block diagram 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 the schematic which shows the positional relationship of a microphone, a speaker, and a speaker same as the above. It is a circuit block diagram of a signal processing part same as the above. It is a signal waveform figure of a signal processing part same as the above. It is a signal waveform figure 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 sectional drawing which shows the attachment state of the speaker of the telephone apparatus of Embodiment 2, and a microphone. It is a block diagram of the wiring system using the communication apparatus of Embodiment 3. 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 partially broken perspective view which shows the arrangement | positioning state of the wiring system using the telephone apparatus (extended function module) same as the above. It is a perspective view which shows the telephone apparatus (extended function module) same as the above. It is a circuit block diagram of a communication apparatus (extended function module) same as the above. It is a circuit block diagram of the function part of a communication apparatus (basic function module) same as the above. It is a perspective view which shows the arrangement | positioning state of the wiring system using the communication apparatus (basic function module) same as the above. FIG. 9 is a circuit configuration diagram of a communication device according to a fifth embodiment. (A) (b) It is the schematic of the conventional communication apparatus. It is a conventional signal waveform diagram. It is a conventional signal waveform diagram.

Explanation of symbols

A Calling device A1 Case SP Speaker M1, M2 Microphone 35e Signal processor

Claims (4)

A speaker for outputting audio information transmitted through the wiring, the first microphone and one or more for outputting an audio signal by collecting a sound, and one or more second microphone, the first, A main body housing a signal processing unit that performs signal processing on each audio signal output from the second microphone and transmits the signal through a wiring;
The distance between the first microphone and the speaker is shorter than the distance between the second microphone and the speaker, and the distance between the first microphone and the sound source outside the apparatus is the outside of the second microphone and the apparatus. The first microphone is disposed on the inner side of the main body facing the diaphragm of the speaker, and the second microphone is disposed on the inner side so as to be longer than the distance to the sound source. The first and second microphones are arranged outside the one surface of the main body and are arranged in parallel in the output direction of the speaker so as to face the center of the diaphragm of the speaker. Is arranged on the diaphragm side of the speaker from the second microphone,
The signal processing unit generates a voice signal in which a voice emitted from the speaker is reduced based on the voice signals of the first and second microphones.   The signal processing unit adjusts a level corresponding to a difference in distance between the first and second microphones and the speaker so as to match each output level of the first and second microphones with respect to sound from the speaker. The first and second microphones with respect to the sound from the speaker by delaying the sound signal according to the transmission time of the sound wave corresponding to the difference in distance between the level adjusting means and the distance between the first and second microphones and the speaker And a differential means for outputting the difference between the audio signals of the first and second microphones that have passed through the delay means. Item 4. The communication device according to Item 1.   The first microphone is arranged with a highly sensitive sound collection surface facing the diaphragm of the speaker, and the second microphone is arranged with a highly sensitive sound collection surface facing a sound source outside the apparatus. 3. The communication device according to claim 1 or 2, wherein   The main body is electrically connected 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 a second connection unit for receiving and supplying an information signal to and from the first connection unit, wherein the speaker outputs audio information transmitted through the second connection unit, and the microphone Transmits audio information through the signal processing unit and the second connection unit, and the form of the second connection unit is fixed corresponding to the stylization of the arrangement and shape of the first connection unit. The communication device according to any one of claims 1 to 3.

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