JP2010010783A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom system capable of reliably informing a dweller of a call from a door intercom slave set of an own dwelling when the call is made from the door intercom slave set of the own dwelling during calling with a door intercom slave set of another dwelling. <P>SOLUTION: Dwellings A1 and A2 of two-generation house each includes: a door intercom slave set 3 with a camera; a control-audio modulation demodulation circuit 11 for making a call with the door intercom slave set 3 using a microphone 10a and a speaker 10b; and extension equipment (an intercom master set 1 and an intercom sub-master sets 2a-2n) equipped with a monitor 12 for displaying a video of the slave set. The intercom master set 1 includes: a calling signal reception circuit 15 for detecting a calling signal from a door intercom slave set 3 in the same dwelling; and a control unit 17 and a video modulation demodulation circuit 13 for causing the monitor 12 of the extension equipment during calling to display an indication for a door intercom call when the calling signal reception circuit 15 detects a calling signal during calling between the extension equipment of the own dwelling and a door intercom slave set 3 of another dwelling. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an intercom system used in a two-family house.

  In recent years, two-family homes in which a parent household and a child household coexist in one house have become widespread. In such a two-family house, an interphone system is provided for each household so that each household can individually respond to visitors. (For example, refer to Patent Document 1).

  In the interphone system disclosed in the above document, the interphone master unit is arranged only in the parent household, and the interphone master unit includes a doorphone slave unit of each household and a plurality of interphone sub-master units installed in each household. Are connected to each other. The interphone master unit and the interphone sub-master unit are provided with a setting switch for enabling / disabling calling from the doorphone slave unit of each household, and the call button is pressed by the doorphone slave unit of any household. When the call signal from the doorphone slave unit is sent to the secondary master unit via the master unit, the master unit and the secondary master unit refer to the setting switch settings and from the doorphone slave unit that can ring the ringing tone. The ring tone was sounded only for the call.

Thus, if the interphone master unit or interphone sub-master unit of one household is set to be able to respond to calls from the doorphone slave unit of another household, the doorphone call from the doorphone slave unit of one household is made. When entered, the intercom master unit or interphone sub-master unit of another household could respond to the door phone call.
JP-A-11-308606

  In the interphone system described above, the interphone master unit is installed only in the parent household, and only the interphone sub-master unit connected to the parent household interphone master unit is installed in the child household. If there is a call from the parent household doorphone slave unit during a call with the child household doorphone slave unit, the parent household interphone master unit detects the call from the own household doorphone slave unit and calls the doorphone. However, even if a call is made from the child's doorphone sub-unit while a call is made between the child's inter-phone sub-master and the parent household's door-phone, the inter-phone of the child household is displayed. Since the secondary master unit cannot directly detect the call from the doorphone slave unit of the household, it cannot display that the call has been made from the doorphone slave unit of the household. Therefore, in the conventional intercom system, when a call is made from the doorphone slave unit of the own household during a call with the doorphone slave unit of another household in either the parent household or the child household, this doorphone is used. There was a problem that could not handle the call.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is that when a call is made from the doorphone slave unit of another household during a call with the doorphone slave unit of another household, An object of the present invention is to provide an intercom system capable of reliably notifying a householder of a call from a door phone slave unit.

  In order to achieve the above object, the invention according to claim 1 is an intercom system provided in a two-family house for making an extension call within a household and between households. An extension installed in a house with a calling means for making a call between the handset including the camera-equipped doorphone and the doorphone with the camera and a video display means for displaying the video taken by the handset. And a call signal detecting means for detecting a call signal from a camera door phone of the same household and a call signal detecting means for calling an extension device during a call with a camera door phone of another household. When the signal is detected, there is provided display control means for causing the video display means to perform a display for notifying the door phone call.

  According to a second aspect of the present invention, in the first aspect of the invention, as an extension device, an interphone master unit to which a slave unit is connected via a slave unit connection terminal and a sub master unit connection terminal of the interphone master unit are connected to the interphone master unit. The interphone master unit is connected to the interphone master unit, and the interphone master unit of each household is connected to the secondary master unit connection terminal of the interphone master unit. The operation mode of the machine is the master unit mode in which video is displayed on the video display means of the own unit based on the video signal of the slave unit of the same household, and the video signal is output to the secondary master unit connection terminal, or another household Switch to one of the sub-master modes to display video on the video display means of your own unit based on the video signal of the slave unit of another household input from the inter-phone master unit via the secondary master unit connection terminal The communication mode between the main unit / sub-master unit and the communication mode between households, the two-household mode that enables transmission / reception of signals to / from the interphone master unit of another household, or the interphone master unit of another household A communication mode switching means for switching to one of the independent household modes for blocking transmission / reception of signals, and when the interphone master unit detects the call signal while operating in the two-household mode, the interphone parent of another household A control signal for switching the operation mode to the sub-master mode is sent to the machine, and the operation mode of the interphone master unit of another household is switched to the sub-master mode. If the call signal detection means detects a call signal while the secondary master is talking to a door phone with a camera in another household, the communication mode switching means Causes transition to an independent households mode, and wherein the shifting the base unit / sub base unit switching means from the sub-master unit mode to the master unit mode.

  The invention of claim 3 includes the detection area as well as outputting a call signal to the intercom master when the environmental change in the predetermined detection area is detected as a slave in the invention of claim 1 or 2. Equipped with a camera unit that captures a specified shooting area, and when the extension device is talking to a camera-equipped doorphone of another household, the call signal detection means detects a call signal from the camera-equipped doorphone or camera unit of the same household. In such a case, which one of the call notification process for causing the video display means to display the call notification from the slave unit by the display control means or the video display process for displaying the video image of the slave unit on the video display means is executed. It is characterized in that setting means for presetting is provided in the extension device of each household.

  The invention of claim 4 is characterized in that, in the invention of claim 3, it is set by the setting means whether to execute the call notification process or the video display process for each extension device.

  The invention of claim 5 is the invention according to any one of claims 1 to 4, wherein the call signal detection means detects the call signal while the extension device is talking to the camera-equipped door phone of another household. The extension device of each household is provided with a selection means for selecting a call partner from the door phone with camera of the household and the door phone with camera of the own household.

  According to the first aspect of the invention, in the extension device of one household, the call signal detecting means is connected to the camera-equipped doorphone of the same household while the call means is communicating with the camera-equipped doorphone of another household. When the call is detected, the display control means causes the video display means to display the doorphone call, so that the housekeeper who is making a call using the extension device can notify the doorphone call displayed on the video display means. Therefore, it is possible to reliably grasp the visitors to the home. In addition, the ringing tone is not sounded, and only the display for notifying the door phone call is displayed on the video display means, so that it is surely notified that there is a visitor at home without interfering with the current call, and the door phone call is made. Therefore, an intercom system with improved convenience can be provided.

  According to the second aspect of the present invention, the interphone master unit is configured such that the call signal detecting means is a doorphone slave unit of the same household when the own unit or the interphone sub-master unit of the same household is talking to the doorphone with a camera of another household. When the call signal from the device is detected, the communication mode switching means shifts from the two-household mode to the independent household mode, and the master / secondary master switching means switches from the secondary master mode to the master mode. The image captured by the camera-equipped doorphone can be displayed on the video display means, and the image of the visitor to the household can be immediately confirmed.

  According to the invention of claim 3, when a call signal from a camera doorphone or camera unit of the own household is detected while talking with a camera doorphone of another household, a call notification process or a video display process is performed. Since which processing is to be performed is set by the setting means, it is possible to set the processing according to the use situation or the user's request, and there is an effect that convenience is improved. Furthermore, if the handset that issued the call signal is a camera handset, the camera handset detects the environmental change (for example, the entry of a person into the detection area) and issues a call signal. It is preferable to check the image of the camera unit early, but if the image display process is set by the setting unit, the image of the camera unit is displayed as the video display unit when the camera unit issues a call signal. Since it is displayed on the screen, there is an effect that safety can be improved.

  According to the invention of claim 4, when a call signal from a camera doorphone or camera slave unit of the own household is detected in a state of talking with a camera doorphone of another household, either the call notification process or the video display process is performed. This process can be set for each individual extension device, so that there is an advantage that convenience is further improved.

  According to the fifth aspect of the present invention, when a call signal is input from the slave unit of the own household while talking with the door phone with the camera of another household, the door phone with the camera of the other household and the camera of the own household are attached. Since the other party can be selected from the door phone using the selection means, there is an effect that convenience is improved.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS. The intercom system of this embodiment is used for a two-family house, and enables extension calls within the two households A1 and A2 of the two-family house and extension calls between the households A1 and A2. In the example of FIG. 1, the household A1 is a parent household and the household A2 is a child household.

  As shown in FIG. 2, each household A1, A2 has one or more doorphones with cameras (hereinafter referred to as doorphone slave units) 3 installed outside a dwelling unit (for example, a front door) and a predetermined detection. When a change in the environment in the area (for example, the entry of a person into the detection area) is detected, a camera unit 4 that outputs a calling signal and captures a predetermined imaging area including the detection area, a microphone 10a, a speaker 10b, and a monitor 12 (video display means), a telephone call is made with the doorphone slave unit 3 using the microphone 10a and the speaker 10b, and images taken by the slave unit (doorphone slave unit 3 and camera slave unit 4) are captured. An interphone master unit (hereinafter abbreviated as “master unit”) 1 to be displayed on the monitor 12, a speaker, a microphone, and a monitor 12 are connected to the master unit 1 via a transmission line Ls 2. Do Interphone sub-master devices (hereinafter abbreviated as sub-master devices) 2a and 2b for making a call with the phone slave unit 3 using a speaker and a microphone and displaying the video imaged by the slave unit on the monitor 12. ... 2n are provided. The master units 1 and 1 of the households A1 and A2 are connected to each other via a transmission line Ls3.

  Then, as shown in FIG. 1, the parent device 1 of each household A1, A2 includes a plurality of child device connection terminals T1 to which child devices (door phone child device 3 and camera child device 4) are connected, and a sub-master device 2a. ... 2n and a master unit 1 of another household are connected via transmission lines Ls2 and Ls3, a plurality of sub master unit connection terminals T2 (T2a, T2b), a microphone 10a, a speaker 10b, and a 2-wire to 4-wire conversion circuit The audio signal output from the microphone 10a including the signal is processed and output to the demultiplexing circuits 16a and 16c, which will be described later, and the audio signal input from the demultiplexing circuits 16a and 16c is signal-processed to output the audio from the speaker 10b. Further, a control / sound modulation / demodulation circuit 11 for transmitting a control signal by the FSK method to the sub-master units 2a to 2n and the camera slave unit 4 and a monitor 12 (video display, for example, a liquid crystal display) Stage), a video modulation / demodulation circuit 13 (video demodulation means) for demodulating the video signals input from the demultiplexing circuits 16b and 16d, which will be described later, and displaying them on the monitor 12, and various operations (response operation to the calling signal, desired By monitoring the line voltage of the transmission line Ls1 and the operation unit 14 for performing the operation for monitoring the video of the doorphone slave unit 3 and the calling operation of the sub-master unit 2a. The call signal receiving circuit 15 (call signal detecting means) that receives the call signal from the slave unit 4 and the voice signal and control signal input from the control / voice modulation / demodulation circuit 11 are frequency-multiplexed and output to the signal line Ls1. A demultiplexing circuit 16a that separates the audio signal from the multiplexed signal input via the signal line Ls1 and outputs it to the control / audio modulation / demodulation circuit 11, and the doorphone sub unit 3 or the camera sub unit A demultiplexing circuit 16b that separates the video signal from the multiplexed signal input from the signal line Ls1 and outputs it to the video modulation / demodulation circuit 13, and the audio signal and control signal input from the control / audio modulation / demodulation circuit 11 with the frequency Multiplexed to be output to the transmission line Ls2 and separated from the multiplexed signal input from the secondary master units 2a to 2n via the transmission line Ls2 and output to the control / sound modulation / demodulation circuit 11 The video signal separated by the demultiplexing circuit 16c and the demultiplexing circuit 16b is frequency-multiplexed again and output to the transmission line Ls2, and the video signal is separated from the transmission signal input via the sub-master unit connection terminal T2. A demultiplexing circuit 16d that outputs to the video modulation / demodulation circuit 13 and a control unit 17 that performs overall operation control using a microcomputer as a main component are provided. Here, the microphone 10a and the speaker 10b and the control / sound modulation / demodulation circuit 11 constitute a calling means.

  Here, although the master unit 1 has three sets of slave unit connection terminals T1, it has only one video modulation / demodulation circuit 13 for receiving and processing video signals, so that collision between video signals is avoided. Therefore, the time-division multiplex transmission method is adopted, and the doorphone slave unit 3 and the camera slave unit 4 are individually assigned to a plurality of time slots defined by the control signal transmitted from the control unit 17 via the transmission line Ls1, Each slave unit 3 and 4 transmits a video signal in the time slot assigned to itself, and the video modulation / demodulation circuit 13 of the base unit 1 receives and reconstructs the original video from the demodulated video signal. And displayed on the monitor 12. The details of time division multiplex transmission are well known in the art and will not be described here.

  The master unit 1 is a master unit / sub-master that switches the signal path of the video signal between a master unit mode that operates as a normal interphone master unit and a sub-master unit mode that performs the same operation as the sub-master units 2a to 2n. A machine switching circuit 18 is provided. When the master unit 1 operates in the master unit mode, the master unit 1 receives the video signal input from the slave unit (door phone slave unit 3 and camera slave unit 4) of the same household via the sub master unit connection terminal T2. Are output to the sub-master devices 2a to 2n of the same household and the master device 1 of other households. When the master unit 1 operates in the secondary master mode, the master unit 1 receives a video signal input from the master unit 1 of another household via the secondary master unit connection terminal T2 (video signal of a slave unit of another household). Is output to the video modulation / demodulation circuit 13 and the video shot by the slave unit of another household is displayed on the monitor 12.

  Here, the master / sub master switching circuit 18 includes a buffer circuit BUF1 provided in the middle of the electrical path between the demultiplexing circuit 16b and the video modulation / demodulation circuit 13, a demultiplexing circuit 16d, and the video modulation / demodulation circuit 13. The buffer circuits BUF2 and BUF3 are connected to each other in the reverse polarity in the middle of the electric circuit between them, and the video modulation / demodulation circuit 13 and the control unit 17 switch on / off the buffer circuits BUF1 to BUF3.

  The buffer circuits BUF1 to BUF3 are controlled to be turned on / off by the video modulation / demodulation circuit 13, and when the switching signal to the master mode is input from the control unit 17 to the video modulation / demodulation circuit 13, the video modulation / demodulation circuit 13 is switched to the buffer circuit BUF1. , BUF2 is turned on, the buffer circuit BUF3 is turned off, and the video signal from the child unit of the same household separated by the demultiplexing circuit 16b is input to the video modulation / demodulation circuit 13, and this video signal is again inputted by the demultiplexing circuit 16d. Multiplexed and output from the sub-master connection terminal T2. When the switching signal from the control unit 17 to the sub-master mode is input to the video modulation / demodulation circuit 13, the video modulation / demodulation circuit 13 turns off the buffer circuits BUF1 and BUF2, and turns on the buffer circuit BUF3. The video signal (video signal of the slave unit of another household) separated from the transmission signal input from the base unit 1 via the secondary base unit connection terminal T2 by the demultiplexing circuit 16d is input to the video modulation / demodulation circuit 13. It has become.

  In addition, the parent device 1 is either a two-household mode that enables transmission / reception of signals to / from the parent device 1 of another household, or an independent household mode that blocks transmission / reception of signals to / from the parent device 1 of other households. A communication mode switching circuit 19 for switching between the two is provided. The communication mode switching circuit 19 includes an extension switch SW1 connected between a sub-master connection terminal T2a to which the master unit 1 of another household is connected and a terminal T2b to which the sub-master units 2a to 2n of the same household are connected. And it comprises the control part 17 which switches on / off of this extension switch SW1. Here, when the two-household mode is selected by the operation unit 14, the control unit 17 turns on the extension switch SW1 according to the selection operation from the operation unit 14, and transmits a signal to the master unit 1 of another household. Allows giving and receiving. On the other hand, when the independent household mode is selected by the operation unit 14, the control unit 17 switches the operation mode to the independent household mode according to the selection operation from the operation unit 14. When there is no detection input of the environmental change by the camera slave unit 4, the extension switch SW1 is turned on so that the control signal can be exchanged with the master unit 1 of another household, and the doorphone call from the doorphone slave unit 3 When there is an environmental change detection input by the camera unit 4, the extension switch SW <b> 1 is turned off, and transmission / reception of signals to / from the base unit 1 of another household is interrupted.

  Further, the sub-master units 2a to 2n are demultiplexed for frequency multiplexing or demultiplexing signals (audio signals, control signals, video signals) with the call signal receiving circuit 15 for receiving call signals from the child units and the child units. Since it has the same configuration as that of the base unit 1 except that the circuits 16a and 16b, the base unit / sub base unit switching circuit 18 and the communication mode switching circuit 19 are not provided, common constituent elements are included. Are denoted by the same reference numerals, and illustration and description thereof are omitted.

  The intercom system of this embodiment has the above-described configuration, and the operation of this intercom system will be described with reference to FIGS.

  When the householder of the parent household A1 performs an operation for switching the operation mode to the two-household mode using the operation unit 14 of the parent machine 1 when leaving the house, for example (step S1 in FIG. 3), the control of the parent machine 1 is performed. The unit 17 switches the operation mode of the own device to the two-household mode based on the operation input from the operation unit 14 (processing S2), and switches the operation mode from the control / sound modulation / demodulation circuit 11 to the demultiplexing circuit 16c to the two-household mode. A control signal is output, and the control signal (switching signal) is frequency-multiplexed by the demultiplexing circuit 16c and output to the parent device 1 of the child household A2 (processing S3). At this time, in the master unit 1 of the child household A2, the demultiplexing circuit 16c separates the control signal from the transmission signal sent from the parent household A1, and outputs this control signal to the control / sound modulation / demodulation circuit 11. The control unit 17 switches the operation mode to the two-household mode based on the control signal demodulated by the control / sound modulation / demodulation circuit 11 (processing S4).

  When the parent device 1 of the parent household A1 and the child household A2 is switched to the two-household mode, the control unit 17 of each parent device 1 always turns on the extension switch SW1, and in the initial state (initially switched to the two-household mode) Set the operation mode to the master mode. In this state, when there is a visitor in the parent household A1, and the visitor presses the call button 3a of the doorphone sub unit 3 (processing S5), the door phone sub unit 3 changes the line voltage of the signal line Ls1 from the standby power supply state. The call signal is transmitted to the base unit 1 by lowering the voltage to a lower voltage (step S6). In the base unit 1, the call signal receiving circuit 15 detects the call signal by monitoring the line voltage of the signal line Ls1, and when the call signal is received and output to the control unit 17, the control unit 17 outputs the signal line. The power supply voltage to Ls1 is shifted from the standby power supply state to the operation power supply state to start the camera built in the doorphone sub unit 3 and to ring the calling signal from the speaker 10b using the control / sound modulation / demodulation circuit 11. Further, the control unit 17 outputs a control signal for ringing the calling signal to the demultiplexing circuit 16c, and the control signal is frequency-multiplexed by the demultiplexing circuit 16c and then the sub-master units 2a to 2n and the parent of the child household A2. The ring tone is also emitted from the sub-master devices 2a to 2n of the same household, the master device 1 of other households, and the sub-master devices 2a to 2n. Furthermore, the control unit 17 outputs a control signal (switching signal) for switching the parent device 1 of the child household A2 to the sub-parent device mode from the control / sound modulation / demodulation circuit 11, and the switching signal is frequency-multiplexed. When transmitted to the parent device 1 of the child household A2 via the subsidiary parent device connection terminal T2 (processing S7), the parent device 1 of the child household A2 switches the operation mode to the subsidiary parent device mode, and the buffer circuits BUF1 and BUF2 are switched. Off, the buffer circuit BUF3 is turned on (processing S8).

  Thereafter, the control unit 17 of the parent device 1 on the parent household side outputs a control signal for assigning a time slot to the door phone slave unit 3 and the camera slave unit 4 from the control / sound modulation / demodulation circuit 11, and this control signal is demultiplexed by the demultiplexing circuit 16a. Is multiplexed and transmitted to synchronize with the intercom unit 3 (processing S9), and when the intercom unit 3 returns a video signal in the time slot assigned to the intercom unit 3 (processing S10). The video signal separated by the demultiplexing circuit 16b is input to the video modulation / demodulation circuit 13 via the buffer circuit BUF1, and the video modulation / demodulation circuit 13 demodulates the video signal to reconstruct the original video, thereby The video is displayed on the monitor 12. The video signal separated by the demultiplexing circuit 16b of the master unit 1 is input to the demultiplexing circuit 16d via the buffer circuits BUF1 and BUF2, and is multiplexed again by the demultiplexing circuit 16d, and then the sub-master unit connection terminal. It is sent via T2a and T2b to the sub-master devices 2a to 2n of the same household and the master device 1 of other households (process S11). Thus, the sub-base unit 2a to 2n in the same household can display the image of the sub unit. In the base unit 1 on the sub-family side, the transmission signal input via the sub-base unit connection terminal T2 is used. Since the video signal is separated by the demultiplexing circuit 16d and input to the video modulation / demodulation circuit 13 via the buffer circuit BUF3, the video of the slave unit can also be displayed on the master unit 1 on the child household side. In step S11, when the video signal of the doorphone sub unit 3 on the parent household A1 side is input from the parent unit 1 of the parent household A1 to the sub-master unit connection terminal T2 of the parent unit 1 of the child household A2, the video signal is Since it is also transmitted to the secondary master units 2a to 2n connected to the secondary master unit connection terminal T2 (processing S12), the video of the doorphone slave unit of the master household A1 is also displayed on the secondary master units 2a to 2n of the slave household A2. Can be made.

  Here, when the householder of the child household A2 hears the ringing tone and presses the response button (call button) 14a of the sub-parent device 2a, for example, the doorphone sub unit 3 of the parent household A1 and the sub-main device 2a of the child household A2 A communication path (B1 in FIG. 2) is formed between the parent device 1 of the parent household A1 and the parent device 1 of the child household A2, and the doorphone child device 3 and the sub-parent device 2a of the child household A2 are connected. A door phone call is made between them (step S13).

  Thereafter, while the sub-master 2a of the child household A2 makes a call with the doorphone child unit 3 of the parent household A1, there is a visitor in the child household A2, and this visitor is in the doorphone child device 3. When the call button 3a is pressed (step S14), the intercom unit 3 lowers the line voltage of the signal line Ls1 to a voltage lower than that in the standby power supply state, thereby calling the call signal to the base unit 1 (C1 in FIG. 2). Is transmitted (process S15). Even in the parent device 1 on the child household side, when the call signal receiving circuit 15 detects the call signal C1 by monitoring the line voltage of the signal line Ls1, and receives the call signal C1 and outputs it to the control unit 17, The control unit 17 shifts the power supply voltage to the signal line Ls1 from the standby power supply state to the operation power supply state, activates the camera by the doorphone slave unit 3, and notifies the call from the slave unit (C2 in FIG. 2). Is output to the demultiplexing circuit 16c, and the control signal C2 is frequency-multiplexed and output to the secondary master units 2a to 2n via the secondary master unit connection terminal T2 (processing S16).

  At this time, the control signal C2 separated by the demultiplexing circuit 16c is input to the control unit 17 in the sub-master unit 2a in communication with the doorphone slave unit 3 of another household, and the control unit 17 performs the control based on the control signal C2. The video modulation / demodulation circuit 13 is controlled to cause the monitor 12 to display to notify the call from the doorphone slave unit 3 of the household. An example of the display screen at this time is shown in FIG. 4. The monitor 12 of the secondary master unit 2a displays an image G1 photographed by the intercom 3 of the other household that is currently talking, A character D1 (for example, “call”) for notifying a call from the doorphone sub unit 3 of the household is displayed in part.

  As described above, in the intercom system according to the present embodiment, in the extension device (interphone master unit 1 or interphone sub-master unit 2a to 2n) of one household, the calling means performs a call with the camera-equipped doorphone 3 of another household. When the call signal receiving circuit 15 detects a call from the doorphone 3 with the camera in the same household, the control unit 17 serving as a display control means controls the video modulation / demodulation circuit 13 to notify the monitor 12 of the doorphone call. Since the display is made, the housekeeper who is talking with the doorphone 3 of another household using the extension device surely grasps the visitor to the home from the notification content of the doorphone call displayed on the monitor 12. This makes it possible to respond to door phone calls. Moreover, since the ringing tone is not sounded and only the display for notifying the door phone call is performed on the monitor 12, it is possible to reliably notify that there is a visitor at home without interfering with the current call, and to improve convenience. An intercom system can be provided.

  In addition, in this system, when the two-household mode is selected on the parent device 1 of any household (parent household or child household), the mode of the parent device 1 of another household (child household or parent household) is also changed to the two-household mode. When switching away from home, if the parent device 1 at home is switched to the two-household mode, the parent device 1 of both the parent and child households can be operated in the two-household mode. When there is a visitor, it is possible to respond in the household at home, which has the advantage of improving convenience.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a schematic system configuration diagram of the intercom system, which has the same configuration as the system described in the first embodiment. Is omitted.

  In the above-described first embodiment, the extension device (interphone master unit 1 or interphone sub-master unit 2a to 2n) of one household makes a call from the doorphone slave unit 3 of the same household during a call with the door phone slave unit 3 of another household. When detected, the display (call notification processing) for notifying the call to the monitor 12 is performed, but in this embodiment, the call with the doorphone sub unit 3 of another household is forcibly terminated, An image from the doorphone sub unit 3 is displayed on the monitor 12 (image display processing).

  Next, the operation of the intercom system of this embodiment will be described with reference to FIG. In addition, in response to the switching operation to the two-household mode in the parent device 1 of the parent household A1, in the state where the parent device 1 of both households A1 and A2 is switched to the two-household mode, the doorphone sub unit 3 of the parent household A1 A process until the secondary phone 2a of the child household A2 responds to the doorphone call from the mobile phone and an extension call is performed between the doorphone cordless handset 3 of the parent household A1 and the secondary phone 2a of the child household A2 ( The processes S1 to S13 in FIG. 6 are the same as the processes S1 to S13 in FIG. 3 described in the first embodiment, and thus the description thereof is omitted.

  Then, while the sub-master 2a of the child household A2 makes a call with the doorphone child device 3 of the parent household A1, there is a visitor in the child household A2, and this visitor is in the doorphone child device 3. When the call button 3a is pressed (step S14), the intercom unit 3 lowers the line voltage of the signal line Ls1 to a voltage lower than that in the standby power supply state, thereby calling the call signal to the base unit 1 (C1 in FIG. 5). Is transmitted (process S15). Even in the parent device 1 on the child household side, when the call signal receiving circuit 15 detects the call signal C1 by monitoring the line voltage of the signal line Ls1, and receives the call signal C1 and outputs it to the control unit 17, The control unit 17 shifts the power supply voltage to the signal line Ls1 from the standby power supply state to the operation power supply state, starts the camera by the doorphone slave unit 3, and terminates the call with the doorphone slave unit 3 of the parent household A1. C2 is output to the demultiplexing circuit 16c, and the control signal C2 is frequency-multiplexed and output to the secondary master units 2a to 2n via the secondary master unit connection terminal T2 (processing S16).

  At this time, the control signal separated by the demultiplexing circuit 16c is input to the control unit 17 in the sub-master 2a in communication with the doorphone slave 3 of another household (in this case, the parent household A1), and this control signal C2 Then, the control unit 17 controls the control / sound modulation / demodulation circuit 11 to forcibly end the call with the door phone sub unit 3 of the parent household A1 (step S18), and sends a control signal to notify the end of the call. It returns to the main | base station 1 of household A2 (process S19). Then, when the parent device 1 of the child household A2 receives the control signal for notifying the end of the call from the sub-parent device 2a, the control signal is separated by the demultiplexing circuit 16c and input to the control unit 17, and the control unit 17 When the extension switch SW1 is turned off, the mode is switched from the two-household mode to the independent household mode, and the operation mode is switched from the sub-master mode to the master mode by turning on the buffer circuits BUF1 and BUF2 and turning off the buffer circuit BUF3. (Processing S20).

  Further, the control signal for notifying the end of the call sent from the sub-parent device 2a on the child household side to the parent device 1 in the process S19 is sent to the parent device 1 on the parent household side via the sub-master device connection terminal T2 of the parent device 1. (Processing S21), the parent device 1 on the parent household side receives the control signal for notifying the end of the call and shifts to the standby mode (Processing S22), and waits for the power supply state to the door phone slave unit 3 The power supply state has been switched (process S23), and the door phone sub unit 3 stops the camera and shifts to a standby state (process S24).

  When the control unit 17 of the parent device 1 on the child household side shifts to the parent device mode in step S20, the control / sound modulation / demodulation circuit 11 outputs a control signal for assigning a time slot to the doorphone child device 3 and the camera child device 4. The demultiplexing circuit 16a multiplexes and transmits this control signal to synchronize with the doorphone slave unit 3 (processing S25), and the doorphone slave unit 3 is in a time slot assigned to itself. When the video signal is returned (processing S26), the video signal separated by the demultiplexing circuit 16b is input to the video modulation / demodulation circuit 13 via the buffer circuit BUF1, and the video modulation / demodulation circuit 13 demodulates the video signal to obtain the original video. By reconstructing, the image of the slave unit is displayed on the monitor 12. The video signal separated by the demultiplexing circuit 16b of the master unit is input to the demultiplexing circuit 16d through the buffer circuits BUF1 and BUF2, and is multiplexed again by the demultiplexing circuit 16d, and then the sub-master unit connection terminal T2a. Are sent to the sub-parent devices 2a to 2n on the child household side (process S27), and the video G2 of the doorphone slave unit 3 of the same household can also be displayed on these sub-master devices 2a to 2n (FIG. 7 (b)). Thereafter, when the householder at the child household sees the image of the doorphone slave unit 3 of his / her household displayed on the monitor 12 of the secondary master unit 2a and presses the response button 14a, A communication path (B2 in FIG. 5) is formed between the two and an extension call is performed (step S28).

As described above, in this embodiment, the extension device (interphone master unit 1 or interphone sub-master unit 2a to 2N) of one household is talking to the doorphone slave unit 3 of the other household while the extension device (door phone child of the same household) is talking. When a call from the device 3 or the camera sub unit 4) is detected, the mode shifts to the independent household mode to forcibly terminate the call with the door phone sub unit 3 of another household,
Since the image displayed on the monitor 12 is switched from the image G1 of the child unit of another household (see FIG. 7A) to the image G2 of the child unit of the own household (see FIG. 7B), the extension device The housekeeper who is making a call using can display the call to the doorphone displayed on the monitor 12 (that is, the image G2 of the child unit 3 of his / her household), and can surely recognize the visitor to the home. Since the image taken by the child unit of the own household can be immediately confirmed on the monitor 12, the presence of a visitor or a suspicious person in the own household can be confirmed immediately.

  In this embodiment, the extension device (interphone master unit 1 or interphone sub-master unit 2a-2n) of one household makes a call from the doorphone slave unit 3 of the same household during a call with the door phone slave unit 3 of another household. When detected, after the operation mode of the main unit 1 is switched to the independent household mode and the sub-main unit mode is switched to the main unit mode, the call with the doorphone sub unit 3 of another household is forcibly terminated. The image of the child device of the own household is displayed on the monitor 12, but the extension device in the parent device 1 of each household is connected to the door phone child device 3 of the other household while the child device of the same household ( When a call from the intercom unit 3 or the camera unit 4) is detected, a call notification process (the process described in the first embodiment) for causing the monitor 12 to display a call from the child unit, or a child Display the image of the instrument on the monitor Which of the image display processes to be executed (the process described in the present embodiment) may be set in advance using the operation unit 14 (setting means). Since a process (call notification process or video display process) that meets the request can be set in advance, there is an effect that convenience is improved.

  In addition, when the child unit of the own household that has issued a call signal during a call with the doorphone unit 3 of another household is the camera unit 4, the camera unit 4 changes the environment (for example, a person entering the detection area or an abnormal state). Therefore, it is preferable to check the video of the camera unit 4 at an early stage for crime prevention and disaster prevention, but the video display processing is set using the operation unit 14. If so, since the image of the camera slave unit 4 is displayed on the monitor 12 when the camera slave unit 4 issues the calling signal, safety can be improved. Here, as a process when an extension device of one household detects a call from a slave unit of the same household during a call with the doorphone slave unit 3 of another household, which of the call display process or the video display process is executed May be set for each individual extension device (that is, for each of the master unit 1 and the sub-master units 2a to 2n), and the convenience can be further improved.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. Since the basic configuration of the intercom system is the same as that described in the first embodiment, common components are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, the extension device (interphone master unit 1 or interphone sub-master unit 2a to 2n) of one household makes a call from the doorphone slave unit 3 of the same household during a call with the door phone slave unit 3 of another household. When detected, the call with the doorphone slave unit 3 of another household is forcibly terminated, the video of the doorphone slave unit 3 of the own household is displayed on the monitor 12, and the doorphone of the own household is displayed according to the operation of the response button 14a. In this embodiment, it is possible to select a call partner from the doorphone sub unit 3 of another household and the door phone sub unit 3 of the own household by operating the operation unit 14. ing.

  Here, the operation of the intercom system will be described with reference to FIGS. In addition, in response to the switching operation to the two-household mode in the parent device 1 of the parent household A1, in the state where the parent device 1 of both households A1 and A2 is switched to the two-household mode, the doorphone sub unit 3 of the parent household A1 A process until the secondary phone 2a of the child household A2 responds to the doorphone call from the mobile phone and an extension call is performed between the doorphone cordless handset 3 of the parent household A1 and the secondary phone 2a of the child household A2 ( The processes S1 to S13 in FIG. 9 are the same as the processes S1 to S13 in FIG. 3 described in the first embodiment, and a description thereof will be omitted.

  Then, while the sub-master 2a of the child household A2 makes a call with the doorphone child device 3 of the parent household A1, there is a visitor in the child household A2, and this visitor is in the doorphone child device 3. When the call button 3a is pressed (step S14), the doorphone sub unit 3 reduces the line voltage of the signal line Ls1 to a voltage lower than that in the standby power supply state, thereby calling the call signal to the base unit 1 (C1 in FIG. 8). Is transmitted (process S15). Even in the parent device 1 on the child household side, when the call signal receiving circuit 15 detects the call signal C1 by monitoring the line voltage of the signal line Ls1, and receives the call signal C1 and outputs it to the control unit 17, The control unit 17 shifts the power supply voltage to the signal line Ls1 from the standby power supply state to the operation power supply state, starts the camera by the doorphone slave unit 3, and terminates the call with the doorphone slave unit 3 of the parent household A1. (C2 in FIG. 8) is output to the demultiplexing circuit 16c, and the control signal C2 is frequency-multiplexed and output to the secondary master units 2a to 2n via the secondary master unit connection terminal T2 (processing S16). .

  At this time, the control signal C2 separated by the demultiplexing circuit 16c is input to the control unit 17 in the sub-master unit 2a in communication with the doorphone slave unit 3 of another household, and the control unit 17 performs the control based on the control signal C2. The video modulation / demodulation circuit 13 is controlled to cause the monitor 12 to display to notify the call from the doorphone slave unit 3 of the household. An example of the display screen at this time is shown in FIG. 4. The monitor 12 of the secondary master unit 2a displays an image G1 photographed by the intercom 3 of the other household that is currently talking, A character D1 (for example, “call”) for notifying a call from the doorphone sub unit 3 of the own household is displayed in part (process S17).

  In this process S17, only the call from the doorphone slave unit 3 of the own household is displayed on the monitor 12 of the secondary master unit 2a, and the call with the doorphone slave unit 3 of the parent household A1 is continued. When the response button 14a of the sub-master unit 2a is pressed (step S18a), the control unit 17 of the sub-master unit 2a selects the other party as the door phone of the parent household A1 in accordance with the selection operation of the response button 14a serving as the selection means. A process of switching from the sub unit 3 to the door phone sub unit 3 of the sub household A2 is performed. That is, in the secondary master unit 2a of the child household A2, the control signal separated by the demultiplexing circuit 16c is input to the control unit 17, and the control unit 17 controls the control / sound modulation / demodulation circuit 11 based on the control signal C2. Then, the telephone conversation with the door phone slave unit 3 of the parent household A1 is terminated (process S18), and a control signal for notifying the termination of the call is returned to the parent machine 1 of the child household A2 (process S19). Then, when receiving the control signal for notifying the end of the call from the secondary master unit 2a, the master unit 1 of the child household A2 is separated by the demultiplexing circuit 16c and input to the control unit 17, and the control unit 17 When the extension switch SW1 is turned off, the mode is switched from the two-household mode to the independent household mode, and the operation mode is switched from the sub-master mode to the master mode by turning on the buffer circuits BUF1 and BUF2 and turning off the buffer circuit BUF3. (Processing S20).

  Further, the control signal for notifying the end of the call sent from the sub-parent device 2a on the child household side to the parent device 1 in the process S19 is sent to the parent device 1 on the parent household side via the sub-master device connection terminal T2 of the parent device 1. (Processing S21), the parent device 1 on the parent household side receives the control signal for notifying the end of the call and shifts to the standby mode (Processing S22), and waits for the power supply state to the door phone slave unit 3 The power supply state has been switched (process S23), and the door phone sub unit 3 stops the camera and shifts to a standby state (process S24).

  When the control unit 17 of the parent device 1 on the child household side shifts to the parent device mode in step S20, the control / sound modulation / demodulation circuit 11 outputs a control signal for assigning a time slot to the doorphone child device 3 and the camera child device 4. The demultiplexing circuit 16a multiplexes and transmits this control signal to synchronize with the doorphone slave unit 3 (processing S25), and the doorphone slave unit 3 is in a time slot assigned to itself. When the video signal is returned (processing S26), the video signal separated by the demultiplexing circuit 16b is input to the video modulation / demodulation circuit 13 via the buffer circuit BUF1, and the video modulation / demodulation circuit 13 demodulates the video signal to obtain the original video. By reconstructing, the image of the slave unit is displayed on the monitor 12. The video signal separated by the demultiplexing circuit 16b of the master unit is input to the demultiplexing circuit 16d through the buffer circuits BUF1 and BUF2, and is multiplexed again by the demultiplexing circuit 16d, and then the sub-master unit connection terminal T2a. Are sent to the sub-parent devices 2a to 2n on the child household side (process S27), and the images of the doorphone slave unit 3 of the same household can also be displayed on these sub-master devices 2a to 2n. Thereafter, when the householder at the child household sees the image of the doorphone slave unit 3 of his / her household displayed on the monitor 12 of the secondary master unit 2a and presses the response button 14a, A call path (B2 in FIG. 8) is formed between the two and an extension call is performed (step S28).

  Thereafter, when the call between the sub-master unit 2a of the child household A2 and the doorphone cordless handset 3 is terminated (processing S29), the control unit 17 of the sub-master unit 2a reduces the power consumption of the operation mode of the own device. While shifting to the standby mode (process S30), a control signal notifying the end of the call is returned to the parent device 1 of the child household A2 (process S31). Then, when the parent device 1 of the child household A2 receives the control signal for notifying the end of the call from the sub-parent device 2a, the control signal is separated by the demultiplexing circuit 16c and input to the control unit 17, and the control unit 17 When the extension switch SW1 is turned on, the independent household mode is switched to the two-household mode, and the buffer circuit BUF1 and BUF2 are turned on and the buffer circuit BUF3 is turned off to switch the operation mode from the sub-master mode to the master mode. (Process S32) Furthermore, the power supply voltage to the transmission line Ls1 is shifted to the standby power supply state, and the door phone slave unit 3 is shifted to the standby state (Process S33).

  As described above, in this embodiment, the extension signal (interphone master unit 1 or interphone sub-master unit 2a to 2N) of one household is calling a call signal from the same household in a state where it is talking with the doorphone slave unit 3 of another household. When detected, the call button can be selected from the doorphone sub-unit 3 of another household and the door-phone sub-unit 3 of the own household by using the response button 14a as selection means. The convenience of the system can be improved by the person himself / herself selecting the other party.

1 is a schematic block diagram of an intercom system according to Embodiment 1. FIG. It is a system configuration | structure figure explaining the operation | movement at the time of the calling during a telephone call same as the above. It is a state transition diagram explaining operation | movement same as the above. It is an example figure of the screen which shows the interphone sub-master | mobile_unit same as the above, and performs a call display. It is a system block diagram of the intercom system of Embodiment 2. It is a state transition diagram explaining operation | movement same as the above. The interphone sub-master unit is shown above, and (a) and (b) are examples of screens before and after receiving a call from the doorphone slave unit of the own household. It is a system block diagram of the intercom system of Embodiment 3. It is a state transition diagram explaining operation | movement same as the above.

Explanation of symbols

1 Interphone main unit (extension equipment)
2a-2n Interphone secondary master unit (extension equipment)
3 Doorphone handset (doorphone with camera)
4 Camera unit 10a Microphone (calling means)
10b Speaker (calling means)
11 Control and voice modulation / demodulation circuit (calling means)
12 Monitor (Video display means)
13 Video Modulation / Demodulation Circuit 15 Call Signal Receiving Circuit (Call Signal Detection Means)
17 Control unit (video control means)
A1 Parent household A2 Child household

Claims (5)

An intercom system that is installed in a two-family house to make extension calls within and between households.
In each household, a handset including a door phone with a camera installed outside the house, a calling means for making a call between the door phone with a camera, and a video display means for displaying an image taken by the handset And an extension device installed in the house, and the extension device detects a call signal from a doorphone with a camera of the same household, and a doorphone with a camera of another household using the call means And a display control means for causing the video display means to display to notify the door phone call when the call signal detection means detects the call signal during a call.   As the extension device, an interphone master unit to which a slave unit is connected via a slave unit connection terminal, and an interphone secondary unit that is connected to a secondary master unit connection terminal of the interphone master unit and communicates with a door phone with a camera via the interphone master unit. In addition to having a master unit, connect the interphone master unit of another household to the sub-master unit connection terminal of the interphone master unit, and set the operation mode of the interphone master unit to the interphone master unit of each household. Based on the signal, display the video on the video display means of the own machine, and output the video signal to the secondary master connection terminal, or from the interphone master of another household via the secondary master connection terminal Based on the video signal of the slave unit of the other household input, the master / secondary master switching means for switching to one of the secondary master modes for displaying the video on the own picture display means, and between the households The communication mode is either a two-household mode that enables transmission / reception of signals to / from the interphone master unit of another household, or an independent household mode that blocks transmission / reception of signals to / from the intercom master unit of other households. And a communication mode switching means for switching. When the call signal detection means detects the call signal while operating in the two-household mode, the interphone master unit switches the operation mode to the sub-master mode for the interphone master unit of another household. A control signal is sent to switch the operation mode of the interphone master unit of other households to the sub-master unit mode. When the call signal detection means detects a call signal while talking on the phone, the communication mode switching means switches from the two-household mode to the independent household mode. , Intercom system of claim 1, wherein the shifting the base unit / sub base unit switching means from the sub-master unit mode to the master unit mode.   As the slave unit, when an environmental change in a predetermined detection area is detected, a call signal is output to the interphone master unit, and a camera slave unit that captures a predetermined shooting area including the detection area is provided. When the call signal detection means detects a call signal from the camera doorphone or camera slave unit in the same household while talking with the camera door phone, the display control means displays a display for notifying the call from the slave unit. The extension device of each household is provided with setting means for setting in advance which of the calling notification process to be performed by the video display means or the video display process for displaying the image of the slave unit on the video display means. The intercom system according to any one of claims 1 and 2.   4. The intercom system according to claim 3, wherein which of the calling notification process and the video display process is executed for each extension device is set by the setting means.   Selection means for selecting a call partner from a camera doorphone of another household and a camera doorphone of the own household when the call signal detection means detects a call signal while the extension device is talking to the camera doorphone of another household The intercom system according to any one of claims 1 to 4, wherein the interphone system is provided in an extension device of each household.

Images