JP5712365B2 - Intercom device and intercom system - Google Patents

Description

The present invention relates to an intercom apparatus and an intercom system including the intercom apparatus .

  Conventionally, an interphone device has been proposed that is installed in a dwelling unit and connected to each of the two slave units installed at the exterior entrance of the dwelling unit via a signal line, and a call signal is individually transmitted between each slave unit. (For example, refer to Patent Document 1).

  An example of a conventional intercom device is shown in FIG. This intercom device AA is connected to two slave units B1 and B2 via signal lines L1 and L2, and transmits / receives a voice signal of call voice to / from each of the slave units B1 and B2. Sends non-call sound signals such as back tone and warning sound to B1 and B2.

  The call processing unit 1 composed of an integrated circuit has two input terminals and two output terminals. A speaker 2 is connected to one output terminal via a speaker amplifier 3. A microphone 4 is connected to one input terminal via a microphone amplifier 5. The call hybrid circuit unit 6 is connected to the other input terminal and output terminal. The call hybrid circuit unit 6 includes a modulation / demodulation unit 9 and an input amplifier 7 and an output amplifier 8 connected to the modulation / demodulation unit 9. The call processing unit 1 performs a process of switching the call direction (voice switch process) by comparing the signal power of the received voice signal input from the input amplifier 8 and the transmitted voice signal input from the microphone amplifier 5. Running.

  A common contact 14C of the first switching unit 14 is connected to the modem unit 9. The modem unit 9 modulates a voice signal (transmission voice signal) input via the input amplifier 7 and outputs the modulated signal to the first switching unit 14, and also demodulates the signal input from the first switching unit 14. A signal (received voice signal) is output to the output amplifier 8. In the first switching unit 14, the switching contact 15A1 of the second switching unit 15 is connected to one switching contact 14A of the two switching contacts 14A and 14B that are switched to the common contact 14C, and the other switching contact 14B. Is connected to the switching contact 15A2 of the second switching unit 15. Further, the child devices B1 and B2 are connected to the two common contacts 15C1 and 15C2 of the second switching unit 15 through the signal lines L1 and L2, respectively.

  The non-call sound processing unit 10 generates a sound other than the call sound (non-call sound) such as a ring tone, a back tone sound, and an alarm sound, and outputs a ring tone or an alarm sound from the first output terminal. The back tone is output from the output terminal. The first output terminal is connected to the switching contact 15B1 of the second switching unit 15 through the amplifier 11A and the transformer 13A, and is connected to the switching contact 15A2 of the second switching unit 15 through the amplifier 11B and the transformer 13B. Further, it is connected to a speaker amplifier 3. On the other hand, the second output terminal is connected to the switching contact 15A1 of the second switching unit 15 through the amplifier 12A, and is connected to the switching contact 15B2 of the second switching unit 15 through the amplifier 12B.

  When an interphone call is performed between the intercom device AA and one slave unit B1, the common contact 14C of the first switching unit 14 is switched and connected to one switching contact 14A, and one of the second switching unit 15 is switched. The common contact 15C1 is switched and connected to the switching contact 15A1. As a result, a call path including the signal line L1 is formed between the call processing unit 1 and the slave unit B1, and an interphone call is possible. Similarly, when an interphone call is performed between the interphone device AA and the other handset B2, the common contact 14C of the first switching unit 14 is switched and connected to the other switching contact 14B, and the second switching unit 15 is connected. The other common contact 15C2 is switched and connected to the switching contact 15A2. As a result, a call path including the signal line L2 is formed between the call processing unit 1 and the slave unit B2, and an interphone call is possible.

  The alarm sound output from the output terminal of the non-call sound processing unit 10 is sounded from the speaker 2 via the speaker amplifier 3, and from the first switching unit 15 to each child unit B1 via the signal lines L1 and L2. , B2 and sounded also from the speakers of the respective slave units B1, B2. The alarm sound is a buzzer sound or a message sound for notifying the occurrence of an emergency such as a fire.

  Further, when there is a call from any of the sub-units B1 (or B2), a ring tone is output from one output terminal of the non-call sound processing unit 10, and a back tone sound different from the ring tone is output from the other output terminal. Is output. The ringing sound is generated from the speaker 2 via the speaker amplifier 3, and the back tone sound is transmitted to the calling child unit B1 (or B2) via the second switching unit 15 and is transmitted to the child unit B1 (or B2). Sounded from the speaker. In addition, when there is a call from the other handset B2 (or B1) during an interphone call with one handset B1 (or B2), a ringing tone is output from one output terminal of the non-call sound processing unit 10 And a back tone different from the ringing tone is output from the other output terminal. In this case, the back tone sound is transmitted to the two slave units B1 and B2 via the second switching unit 15, and is emitted from the speakers of the slave units B1 and B2.

JP-A-10-210163

  However, the conventional example shown in FIG. 10 is provided with two switching units, a first switching unit 14 and a second switching unit 15, in order to switch the destinations B1 and B2 of the other party and the non-calling sound output destination. As a result, the circuit scale has increased and it has been difficult to reduce the size of the intercom device. In addition, since the number of circuit components increases, there is a problem that it is difficult to reduce the cost.

  The present invention has been made in view of the above problems, and aims to reduce the size and cost.

  The intercom apparatus according to the present invention includes a microphone and a speaker, a call processing unit that inputs and outputs audio signals, a non-call sound processing unit that generates a non-call sound, and a plurality of slave units, the call processing unit and the non-call sound. A switching unit that is selectively connected to the processing unit, a first adding unit that adds two input signals and outputs them to the speaker, and a second addition that adds two input signals and outputs them to the switching unit A voice signal output from the call processing unit and a non-call sound signal output from the non-call sound processing unit are the two input signals.

  In this intercom apparatus, the switching unit preferably comprises an integrated circuit in which a plurality of relay elements are integrated.

  In this intercom apparatus, it is preferable that the first adder and the second adder are composed of operational amplifiers.

  In this intercom apparatus, it is preferable that the call processing unit and the non-call sound processing unit are configured by a single microprocessor.

The intercom apparatus preferably includes a simultaneous broadcast switching unit that selectively switches between an externally input sound signal and a sound signal of the simultaneous broadcast and inputs them to the call processing unit.
An intercom system according to the present invention includes any one of the interphone devices, and a plurality of slave units that are alternatively connected to a call processing unit and a non-call sound processing unit of the interphone device.

The intercom apparatus and intercom system of the present invention have the effect of being able to reduce the size and cost.

It is a block diagram which shows embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the intercom call with a subunit | mobile_unit same as the above. It is explanatory drawing for demonstrating operation | movement at the time of an alarm sound ringing same as the above. It is explanatory drawing for demonstrating the operation | movement at the time of the call from a subunit | mobile_unit same as the above. It is explanatory drawing for demonstrating the operation | movement at the time of the call from a subunit | mobile_unit same as the above. It is explanatory drawing for demonstrating the operation | movement at the time of the calling in the intercom call same as the above. It is explanatory drawing for demonstrating the operation | movement at the time of the calling in the intercom call same as the above. It is a block diagram which shows other embodiment of this invention. It is a block diagram which shows other embodiment of this invention. It is a block diagram which shows a prior art example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, since the basic configuration of each embodiment described below is the same as that of the conventional example shown in FIG. 10, the same components as those of the conventional example are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  As shown in FIG. 1, the intercom apparatus A of the present embodiment is connected to two slave units B1 and B2 via signal lines L1 and L2. The call processing unit 1 has two input terminals and two output terminals, and one output terminal is connected to the speaker 2 via the first addition unit 16. The other output terminal is connected to the second addition unit 17 of the call hybrid circuit unit 6. The call hybrid circuit unit 6 includes a modulation / demodulation unit 9, a second addition unit 17 and an output amplifier 8 connected to the modulation / demodulation unit 9 instead of the input amplifier 7. The modem unit 9 is connected to two switching contacts 15A1 and 15B2 of a switching unit (second switching unit) 15.

  The non-calling tone processing unit 10 outputs an alarm sound and a back tone sound for the slave unit from the first output terminal, and outputs an acoustic signal of the ringing tone and the alarm sound from the second output terminal, respectively. The first output terminal is connected to the two switching contacts 15B1 and 15A2 of the switching unit 15 via the amplifier 11 and the transformer 13, and is connected to the inverting input terminal of the second adding unit 17. On the other hand, the second output terminal is connected to the inverting input terminal of the first adder 16. Note that one output terminal of the call processing unit 1 is connected to the non-inverting input terminal of the first adding unit 16, and the other output terminal of the call processing unit 1 is connected to the non-inverting input terminal of the second adding unit 17. Has been. Here, each of the first adder 16 and the second adder 17 is composed of an operational amplifier, and outputs a signal obtained by adding the signal input to the inverting input terminal and the signal input to the non-inverting input terminal.

  The subunits B1 and B2 in the present embodiment have the same configuration, and include a microphone 30, a speaker 31, a microphone amplifier 32, a modem unit 33, and the like. That is, the audio signal (speech audio signal) amplified by the microphone amplifier 32 is modulated by the modem unit 32 and transmitted to the signal lines L1 and L2, and the signals captured from the signal lines L1 and L2 are demodulated by the modem unit 32. Voice (received voice) is emitted from the speaker 31.

  When an interphone call is performed between the intercom device A and one slave unit B1, one common contact 15C1 of the switching unit 15 is switched and connected to the switching contact 15A1. As a result, a communication path including the signal line L1 (see the thick solid line in FIG. 1) is formed between the call processing unit 1 and the slave unit B1, and an interphone call is possible. Similarly, when an interphone call is performed between the interphone device A and the other handset B2, the other common contact 15C2 of the switching unit 15 is switched and connected to the switching contact 15A2. As a result, a call path including the signal line L2 (see the thick solid line in FIG. 2) is formed between the call processing unit 1 and the slave unit B2, and an interphone call becomes possible.

  Further, the sound signal of the alarm sound output from the second output terminal of the non-call sound processing unit 10 is input to the speaker 2 via the first addition unit 16, and the alarm sound is emitted from the speaker 2. On the other hand, the acoustic signal of the alarm sound for the slave unit output from the first output terminal of the non-call sound processing unit 10 is input from the second addition unit 17 to the switching contact 15A1 of the switching unit 15 via the modem unit 9. In addition, the signal is input to the switching contact 15A2 of the switching unit 15 through the amplifier 11 and the transformer 13. At this time, in the switching unit 15, the common contact 15C1 is connected to the switching contact 15A1, and the common contact 15C2 is connected to the switching contact 15A2. Therefore, an alarm sound signal is sent to either of the two slave units B1 and B2. Is transmitted (see FIG. 3). Therefore, an alarm sound is emitted from the speakers 31 of both the slave units B1 and B2.

  Further, when there is a call from one of the handset B1, an acoustic signal of the ringing tone is output from the second output terminal of the non-calling tone processing unit 10, and a backtone sound different from the ringing tone is output from the first output terminal. An acoustic signal is output. The sound signal of the ringing tone is input to the speaker 2 via the first adder 16 and the ringing tone is generated from the speaker 2, and the sound signal of the back tone is transmitted to the calling device B1 via the switching unit 15. Then, the sound is inputted to the speaker 31 of the child device B1 and a back tone is emitted from the speaker 2. At this time, in the switching unit 15, the common contact 15C1 is connected to the switching contact 15B1 to which the backtone sound signal is input (see FIG. 4). Similarly, when there is a call from the other handset B2, the sound signal of the ringing tone is output from the second output terminal of the non-calling tone processing unit 10, and the back tone sound different from the ringing tone is output from the first output terminal. The acoustic signal is output. The sound signal of the ringing tone is input to the speaker 2 via the first addition unit 16 and the ringing tone is generated from the speaker 2, and the acoustic signal of the back tone sound is transmitted to the calling device B2 via the switching unit 15. Then, the sound is inputted to the speaker 31 of the child device B2, and a back tone is emitted from the speaker 31. At this time, in the switching unit 15, the common contact 15C2 is connected to the switching contact 15A2 to which the backtone sound signal is input (see FIG. 5).

  Furthermore, when there is a call from the other handset B2 during an interphone call with one handset B1, an acoustic signal of the ringing tone is output from the second output terminal of the non-call sound processing unit 10 and An acoustic signal having a back tone different from the ringing tone is output from one output terminal. The sound signal of the ringing tone is added to the received voice in the first adder 16 and is input to the speaker 2 so that the ringing tone is generated from the speaker 2. The acoustic signal of the back tone is transmitted to the child of the caller via the switching unit 15. Is transmitted to the device B2 and input to the speaker 31 of the child device B2, and a back tone is emitted from the speaker 31. At this time, in the switching unit 15, the common contact 15C2 is connected to the switching contact 15A2 to which the backtone sound signal is input (see FIG. 6). Similarly, when there is a call from one handset B1 during an interphone call with the other handset B2, a sound signal of the ringing tone is output from the second output terminal of the non-call sound processing unit 10 and An acoustic signal having a back tone different from the ringing tone is output from one output terminal. The sound signal of the ringing tone is added to the received voice in the first adder 16 and is input to the speaker 2 so that the ringing tone is generated from the speaker 2. The acoustic signal of the back tone is transmitted to the child of the caller via the switching unit 15. Is transmitted to the device B1 and input to the speaker 31 of the child device B1, and a back tone is emitted from the speaker 31. At this time, in the switching unit 15, the common contact 15C1 is connected to the switching contact 15A1 to which the backtone sound signal is input (see FIG. 7).

  As described above, the intercom apparatus A of the present embodiment can realize the same function with a smaller circuit scale than the conventional example shown in FIG. That is, in this embodiment (see FIG. 1), three amplifiers 11B, 12A, 12B, one transformer 13B and the first switching unit 14 are deleted from the conventional example (see FIG. 10), and the number of circuit components is reduced. In addition, the wiring pattern for the circuit component is reduced. Therefore, this embodiment can reduce the size and cost as compared with the conventional example.

  Here, if the switching unit 15 is configured by an integrated circuit (relay IC) in which two relay elements are integrated, further miniaturization and cost reduction can be achieved. In the present embodiment, since the first adder 16 and the second adder 17 are composed of operational amplifiers, size reduction and cost reduction are not hindered when compared with the conventional example.

  By the way, in order to further reduce the size and cost, the call processing unit 1 and the non-call sound processing unit 10 may be configured by one microprocessor 40. For example, as shown in FIG. 8, the call processing performed by the call processing unit 1 and the non-call sound generation processing performed by the non-call sound processing unit 10 may be executed by the microprocessor 40. However, the microprocessor 40 is connected with a 2-input 2-output codec section 41 and a 2-channel D / A conversion section 42. The audio signal (transmitted audio signal) output from the microphone amplifier 5 and the audio signal (received audio signal) output from the output amplifier 8 of the call hybrid circuit unit 6 are encoded by the codec unit 41 and transmitted to the microprocessor 40. Entered. Also, the audio signals (transmitted audio signal and received audio signal) output from the microprocessor 40 are decoded by the codec unit 41 and output to the first adder 16 and the second adder 17.

  In the intercom system for apartments, voice etc. are sent from the telephone equipment (alarm monitoring panel) installed in the manager's room of the apartment to the units (interphone device A) installed in each unit. It may be broadcast. In order to cope with such broadcast, as shown in FIG. 9, a broadcast amplifier 50 for receiving and amplifying broadcast audio signals (or non-sound acoustic signals) and a broadcast switching unit 51 are connected to an interphone. Device A may be provided. In the broadcast switching unit 51, the common contact 51C connected to the input terminal of the call processing unit 1 is connected to the switching contact 51A connected to the output amplifier 8 of the call hybrid circuit unit 6 and the broadcast amplifier 50. It is selectively switched to and connected to the switching contact 51B. Thus, when receiving a broadcast, since the common contact 51C of the broadcast switching unit 51 is connected to the switching contact 51B, the broadcast audio signal amplified by the broadcast amplifier 50 is transmitted to the call processing unit. 1 is input. Then, the call processing unit 1 outputs a broadcast broadcast audio signal from the output terminal to the first addition unit 16, and sounds the broadcast broadcast sound from the speaker 2. However, the common contact 51C of the broadcast switching unit 51 is connected to the switching contact 51A except when the broadcast is received. Thus, even in the case of simultaneous broadcasting, it is only necessary to add the broadcast broadcasting amplifier 50 and the simultaneous broadcasting switching unit 51, so that the size and cost can be reduced.

1 Call processing unit 2 Speaker 4 Microphone
10 Non-call sound processor
15 Switching section
16 First adder
17 Second adder

Claims (6)

  A microphone and a speaker, a call processing unit for inputting / outputting a voice signal, a non-call sound processing unit for generating a non-call sound, and a plurality of slave units alternatively to the call processing unit and the non-call sound processing unit A switching unit that performs switching connection; a first addition unit that adds two input signals to output to the speaker; and a second addition unit that adds two input signals to output to the switching unit; The intercom apparatus, wherein an audio signal output from the processing unit and an acoustic signal of non-calling sound output from the non-calling sound processing unit are the two input signals.   2. The intercom apparatus according to claim 1, wherein the switching unit includes an integrated circuit in which a plurality of relay elements are integrated.   The intercom apparatus according to claim 1 or 2, wherein the first adder and the second adder are operational amplifiers.   The intercom apparatus according to any one of claims 1 to 3, wherein the call processing unit and the non-call sound processing unit are configured by a single microprocessor.   5. The broadcast broadcast switching unit according to claim 1, further comprising a broadcast broadcast switching unit configured to switch between a sound signal and a sound signal of a broadcast broadcast input from the outside and to input to the call processing unit. The intercom device described. The intercom apparatus according to claim 1, and a plurality of slave units that are alternatively connected to a call processing unit and a non-call sound processing unit of the interphone apparatus. Intercom system.

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