JP2005191714A - Security interphone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of blinking an alarm display light circuit of a camera attached entrance slave unit even at interruption of power of a monitor apparatus. <P>SOLUTION: The security interphone system disclosed herein is provided with a security interphone unit 3 that is called by the camera attached entrance slave unit 1 connected to the monitor apparatus 2 to make a speech therewith and allows the alarm display light circuit 14 of the camera attached entrance slave unit 1 to make alarm display via the monitor apparatus 2 by an alarm signal from a security sensor 4. The camera attached entrance slave unit is connected to the monitor apparatus by four wires L1 to L4, and the monitor apparatus is connected to the security interphone unit by three wires L5 to L7. The security interphone system is also provided with a changeover device 24 that switches the four wires in such a way that the two wires L3, L4 among the four wires are used for a call / a speech between the camera attached entrance slave unit and the security interphone unit and the other two wires L1, L2 are used for transmitting a video signal of a video image imaged by a camera to the monitor apparatus when no alarm is raised and are used for supplying power to the alarm display light circuit when an alarm is raised. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a security intercom system, and more particularly, to a security intercom system provided with a camera-equipped cordless handset having a built-in alarm indicator light circuit, a monitor device that displays an image captured by the camera entrance cordless handset, and a security sensor.

  Conventionally, as this type of security intercom system, the video signal photographed by the camera is output to the connection line and the drive power source is obtained from the connection line, and the video signal is input and photographed by the camera door entry device. And a security intercom device having a security function for generating an alarm sound by inputting an alarm signal from a security sensor such as a smoke detector. (For example, refer to Patent Document 1).

  By the way, in such a security intercom system, a telephone / alarm sound sending circuit that receives power supply from the power supply circuit of the monitor device is built in the entrance unit with a camera, and a video signal and a call signal are sent to the monitor device. A conversion circuit for superimposing and transmitting the power to the entrance unit with camera is built in, and this conversion circuit is also configured to receive power from the power supply circuit of the monitor device.

  Therefore, in the conventional security intercom system, when the power supply circuit of the monitor device is set to OFF, there is a problem in that an alarm sound is not output from the camera-equipped entrance slave unit. Further, since a conversion circuit is required, the number of parts is increased, and there is a problem that the cost is high.

Japanese Patent Laid-Open No. 10-108167 (paragraph number “009”, FIG. 1)

  The present invention has been made to solve the above-mentioned problems, and can generate an alarm sound from an entrance unit with a camera even when the power supply circuit of the monitor device is set to OFF. The objective is to provide a security intercom system that is small in size, small in size, and advantageous in cost.

  A security intercom system according to a first aspect of the present invention includes an entrance cordless device with a camera that is installed at a front door and has a built-in warning indicator light circuit, a monitor device that displays an image captured by the entrance cordless device with a camera installed in a room A security intercom device that is connected to a monitor device and is called from a camera entrance slave unit to make a call and that displays a warning on a warning indicator light circuit of the camera entrance slave device via an alarm signal from a security sensor, The attached entrance cordless handset is connected to the monitor device by four lines, the monitor device is connected to the security intercom device by three wires, and two of the four wires are used for calling and calling between the entrance cordless device with camera and the security interphone device. The other two wires are used for the video signal that transmits the video captured by the camera to the monitor device when the alarm is not triggered. Use Te, when the alarm onset report are those comprising a switch for switching to use for the supply of power to the alarm indicator circuit.

  According to a second aspect of the present invention, in the security intercom system according to the first aspect of the present invention, when an alarm is not issued, it is used for a video signal, and when an alarm is issued, the power is supplied to the alarm indicator lamp circuit. The two wires used as the polarity are reversed, the reference voltage of the video signal when the alarm is not triggered and the reference voltage of the power supply to the alarm indicator light circuit when the alarm is triggered are reversed, and the polarity in the entrance unit with the camera The operation of the camera power supply circuit of the camera-equipped entrance cordless handset is controlled by the discrimination.

  According to a third aspect of the present invention, in the security intercom system according to the first aspect of the present invention, the reference voltage of the video signal when no alarm is issued and the reference for power supply to the alarm indicator lamp circuit when the alarm is issued Each voltage is set to a separate voltage, and the operation of the camera power supply circuit is controlled by voltage discrimination at the camera-equipped entrance unit.

  According to the security intercom system of the first aspect to the third aspect of the present invention, since the switch device is built in the monitor device, two of the four lines connecting the entrance slave unit with the camera and the monitor device. The line is used for calling / calling between the entrance unit with camera and the security intercom device, and the other two wires are used for the video signal to transmit the image captured by the camera to the monitor device when the alarm is not triggered. When the alarm is issued, it can be used for supplying power to the alarm indicator lamp circuit. Therefore, according to the security intercom system of the first aspect to the third aspect of the present invention, even if the power circuit of the monitor device is set to OFF, it is possible to generate an alarm sound from the entrance unit with the camera. Further, since the conversion circuit is not built in the monitor device, the number of parts is small, the device can be miniaturized, and the cost is also advantageous.

  Embodiments to which the security intercom system of the present invention is applied will be described in detail below with reference to the drawings. Here, FIG. 1 shows a block diagram of the security intercom system of the present invention.

  In FIG. 1, the security intercom system of the present invention is installed in a front door, and is installed in a living room with a camera-equipped handset 1 having first to fourth handset terminals T1a to T1d. Monitor device 2 having monitor terminals T2a to T2g, security intercom device 3 installed in a room and having first to third parent device terminals T4a to T4c, and security sensor 4 installed in the vicinity of security intercom device 3 And. Here, the first slave terminal T1a is connected to the first monitor terminal T2a via the first line L1, and the second slave terminal T1b is connected to the second monitor terminal T2b via the second line L2. The third handset terminal T1c is connected to the third monitor terminal T2c via the third line L3, and the fourth handset terminal T1d is connected to the fourth monitor terminal T2b via the fourth line L4. The fifth monitor terminal T2e is connected to the first master terminal T4a via the fifth line L5, and the sixth monitor terminal T2f is connected to the second master terminal T4b via the sixth line L6. The monitor terminal T2g is connected to the third master unit terminal T4c via the seventh line L7.

  The entrance child device 1 with a camera includes a camera 11, a camera power supply circuit 12, a modulation circuit 13, an alarm indicator light circuit 14, a calling circuit 15, a child device call circuit 16, a child device microphone 17, a child device speaker 18, and first to first devices. Each part (circuit) of 4 diodes D1-D4 is provided. Here, the first handset terminal T1a is connected to the modulation circuit 13, the anode side of the second diode D2 and the cathode side of the third diode D3. The camera 11 and the camera power supply circuit 12 are connected to the modulation circuit 13, The camera 11 is connected to the cathode side of the second diode D2 via the camera power supply circuit 12, and the alarm indicator lamp circuit 14 is connected to the anode side of the third diode D3. The second handset terminal T1b is connected to the modulation circuit 13, the cathode side of the first diode D1 and the anode side of the fourth diode D4, and the camera power circuit 12 is connected to the anode side of the first diode D1. The alarm indicator lamp circuit 14 is connected to the cathode side of the fourth diode D4. Further, the third and fourth handset terminals T1c and T1d are connected to the handset communication circuit 16, and the handset call circuit 16 is connected to the calling circuit 15, the handset microphone 17, and the handset speaker 18.

  The monitor device 2 includes an LCD 21, a power circuit 22, a demodulator circuit 23, a switch 24 including a switching relay, a call / call detection circuit 25, a monitor CPU 26, an alarm detection circuit 27, and first and second transformer coils T 1, Each part (circuit) of T2 is provided. Here, the switch 24 includes first and second common contacts C1, C2, first and second break contacts B1, B2, and first and second make contacts M1, M2. The common contact C1 is connected to the first monitor terminal T2a, the second common contact C2 is connected to the second monitor terminal T2b, and the first make contact M1 is supplied via the demodulator circuit 23 and the first transformer coil T1. In the circuit 22, the second make contact M2 is connected to the power supply circuit 22 via the demodulation circuit 23 and the second transformer coil T2, and the first break contact B1 is the fourth monitor terminal T2d, the call / call detection circuit 25. The alarm detection circuit 27 and the seventh monitor terminal T2g, and the second break contact B2 are connected to the alarm detection circuit 27 and the fifth monitor terminal T2e, respectively. The monitor CPU 26 is connected to the power supply circuit 22, the switch 24, the call / call detection circuit 25 and the alarm detection circuit 27, and the third monitor terminal T2c is connected to the call / call detection circuit 25 and the sixth monitor terminal T2f. Are connected to each.

  The security intercom device 3 includes a security sensor monitoring circuit 31, an alarm display circuit 32, a parent device CPU 33, an alarm sound transmission circuit 34, a relay 35, a call detection circuit 36, a parent device call circuit 37, a parent device speaker 38, and a parent device microphone 39. Each part (circuit) is provided. Here, the base unit CPU 33 is connected to the security sensor monitoring circuit 31, the alarm display circuit 32, the alarm sound sending circuit 34, the relay 35, the call detection circuit 36, the base unit call circuit 37, and the base unit speaker 38, and the security sensor monitoring circuit. A security sensor 4 is connected to 31, a first parent device terminal T 4 a is connected to the alarm display circuit 32, and a parent device speaker 38 and a parent device microphone 39 are connected to the parent device communication circuit 37. The relay 35 includes a third common contact C3, a third break contact B3, and a third make contact M3. The third common contact C3 includes a second master terminal T4b and a third common contact C3. An alarm sound transmission circuit 34 is connected to the break contact B3, a call detection circuit 36 and a parent device call circuit 37 are connected to the third make contact M3, respectively. A master terminal T4c is connected.

  Next, the operation of the security intercom system of the present invention configured as described above will be described.

  First, at the time of standby, the first common contact C1 of the switch 24 is on the first break contact B1 side, the second common contact C2 is on the second break contact B2 side, and the third common of the relay 35 is set. The contact C3 is connected to the third make contact M3 side. As a result, the first and third parent device terminals T4a, T4c, the fifth and seventh lines L5, L7, the fifth, and the seventh monitor are transmitted from the parent device power supply circuit (not shown) in the security intercom apparatus 3. Via the terminals T2e, T2g, the switch 24, the first and second monitor terminals T2a, T2b and the route of the first and second lines L1, L2 (hereinafter referred to as “first power supply route”). Between the first and second handset terminals T1a and T1b, a voltage of 12V is supplied with the first handset terminal T1a as the plus side and the second handset terminal T1b as the minus side, Third master terminal T4b, T4c, sixth and seventh lines L6, L7, sixth and seventh monitor terminals T2f, T2g, third and fourth monitor terminals T2c, T2d and third and fourth Via the routes L3 and L4 (hereinafter referred to as “call / call routes”) Third, fourth handset terminals T1c, a predetermined voltage is supplied between T1d Te. Here, the camera power supply circuit 12 of the camera-equipped cordless handset 1 is set to operate at a specific voltage (for example, about 18V) and not to operate at a voltage lower than this voltage (for example, about 12V). In the standby voltage (12V), the camera power supply circuit 12 does not operate, the first handset terminal T1a is on the plus side, the second handset terminal T1b is on the minus side, and the third and fourth Since the polarity is reversed with respect to the diodes D3 and D4, the warning indicator lamp circuit 14 does not operate.

  In this state, when a visitor presses a call button (not shown) of the camera-equipped handset 1, a call signal is output from the call circuit 15, and this call signal is sent to the handset call circuit 16 and the call / call route. Is sent to the call detection circuit 36. When the calling signal is detected by the parent CPU 33, a calling sound is reported from the parent speaker 38 under the control of the parent CPU 33.

  When the call signal transmitted to the call / call route is detected by the call / call detection circuit 25, the monitor 24 controls the switch 24 and the power supply circuit 22. As a result, the first common contact C1 is switched to the first make contact M1 side and the second common contact C2 is switched to the second make contact M2 side, and the power supply circuit 22 operates on the demodulation circuit 23 and the LCD 21. Power is supplied, and the first and second transformer coils T1 and T2, the switch 24, the first and second monitor terminals T2a and T2b, and the routes of the first and second lines L1 and L2 (hereinafter referred to as the first and second lines L1 and L2). The first handset terminal T1a is on the plus side and the second handset terminal T1b is on the minus side between the first and second handset terminals T1a and T1b. 18V is supplied.

  Here, when the voltage between the first and second handset terminals T1a and T1b rises to 18V, the camera power supply circuit 12 operates, and operating power is supplied from the camera power supply circuit 12 to the camera 11 and the modulation circuit 13. . As a result, the video of the visitor is picked up by the camera 11, and the picked up video is FM-modulated through the modulation circuit 13, and the first and second handset terminals T1a, T1b, first, The signals are sent to the demodulation circuit 23 via the second lines L 1, L 2, the first and second monitor terminals T 2 a, T 2 b and the route of the switch 24. The FM video signal is demodulated by the demodulation circuit 23 and sent to the LCD 21 including a cathode ray tube or a liquid crystal device. Thereby, a visitor's image | video is projected on LCD21. Even when the voltage between the first and second handset terminals T1a and T1b rises to 18V, the first handset terminal T1a is on the plus side, the second handset terminal T1b is on the minus side, Since the third and fourth diodes D3 and D4 have opposite polarities, the warning indicator lamp circuit 14 does not operate as described above.

  Here, when the resident confirms the visitor based on the ringing sound reported from the main unit speaker 38 and the image displayed on the LCD 21, and picks up a handset (not shown) and answers the call, the entrance unit with camera 1 A call path is formed between the call function (the handset microphone 17 and handset speaker 18) of the mobile phone and the call function (the base phone speaker 38 and the base phone microphone 39) of the security intercom apparatus 3 via the call / call route. Is done. Thereby, the resident can talk with the visitor. When the security intercom device 3 enters a call state, a call signal is sent from the security intercom device 3 to the call / call route. When this call signal is detected by the call / call detection circuit 25, the monitor CPU 26 The video of the visitor is displayed on the LCD 21 by the control until the call is finished.

  Next, when the security sensor 4 such as a smoke detector operates in a call state, an alarm signal is sent to the security sensor monitoring circuit 31. When the alarm signal is detected by the master CPU 33, the security intercom device 3 From a parent device power supply circuit (not shown) via first and third parent device terminals T4a and T4c, and fifth and seventh lines L5 and L7 (hereinafter referred to as "third power supply route"). Then, a voltage of 12 V is supplied between the fifth and seventh monitor terminals T2e and T2g, with the fifth monitor terminal T2e as the positive side and the seventh monitor terminal T2g as the negative side. At the same time, a warning display signal and a warning sound signal are output from the master CPU 33, the former warning display signal is sent to the warning display circuit 32, and the latter warning sound signal is sent to the warning sound sending circuit 34. The third common contact C3 of the relay 35 is switched to the third break contact B3 side under the control of the parent device CPU33.

  As a result, the alarm sound signal output from the alarm sound transmission circuit 34 is transmitted to the slave speaker 18 via the relay 35 and the call / call route, and the alarm sound is reported from the slave speaker 18.

  When the voltage between the fifth and seventh monitor terminals T2e and T2g is detected by the alarm detection circuit 27, the first common contact C1 of the switch 4 is controlled by the monitor CPU 26 to the first break contact B1 side. In addition, the second common contact C2 is switched to the second break contact B2 side. As a result, the voltage supplied between the fifth and seventh monitor terminals T2e and T2g passes through the route of the switch 24, the first and second monitor terminals T2a and T2b, and the first and second lines L1 and L2. A voltage of 12V is supplied between the first and second slave terminal T1a and T1b via the first slave terminal T1a on the negative side and the second slave terminal T1b on the positive side. Here, since the voltage between the first and second handset terminals T1a and T1b is 12V, the camera power supply circuit 12 does not operate, and the first handset terminal T1a is on the negative side and the second handset. Since the machine terminal T1b is on the plus side, the alarm indicator lamp circuit 14 operates. Accordingly, the alarm display signal transmitted from the alarm display circuit 32 is transmitted to the alarm indicator lamp circuit 14 via the first power supply route, and thereby, an alarm indicator lamp (not shown) constituting the alarm indicator lamp circuit 14 is transmitted. ) Flashes and the occurrence of abnormality is notified to the outside.

  Next, when the security sensor 4 operates in the standby state, an alarm signal is sent to the security sensor monitoring circuit 31 as described above, and when such an alarm signal is detected by the master CPU 33, the security intercom device 3 From the parent device power supply circuit, the first child device terminal T1a is added to the minus side and the second child device terminal T1b is added between the first and second child device terminals T1a and T1b via the first power supply route. Voltage is supplied. Here, if the voltage between the first and second handset terminals T1a and T1b is larger than the standby voltage and smaller than the operating voltage of the camera power supply circuit 12, and if the voltage has a polarity opposite to that of the standby voltage, an alarm is issued. The indicator lamp circuit 14 operates and the camera power supply circuit 12 does not operate. Accordingly, as described above, the alarm display signal transmitted from the alarm display circuit 32 is transmitted to the alarm display lamp circuit 14 via the first power supply route, and thereby the alarms constituting the alarm display lamp circuit 14 are transmitted. The indicator lamp blinks and an alarm sound is reported from the handset speaker 18.

  As described above, in the above-described embodiment, since the switching device 24 is built in the monitor device 2, two wires out of the four wires L <b> 1 to L <b> 4 connecting the entrance device with camera 1 and the monitor device 2. L3 and L4 are used for calling / calling between the handset 1 with camera and the security intercom device 3, and when the other two lines L1 and L2 are not alarmed, the image captured by the camera 11 is monitored. As a video signal to be transmitted to the camera, it can be used to supply power to the alarm indicator lamp circuit 14 when an alarm is issued.

  In the above-described embodiment, the first and second lines L1 and L2 used for power supply to the alarm indicator lamp circuit 14 are polar when the alarm is issued, and the video signal when the alarm is not issued. The reference voltage of the power supply to the alarm indicator lamp circuit 14 at the time of alarm is reversed and the operation of the camera power circuit 12 is controlled by determining the polarity in the entrance unit with camera 1. The operation of the camera power supply circuit 12 is controlled only by the reference voltage of the video signal at the time of non-reporting, or the operation of the camera power supply circuit 12 is controlled only by reversing the reference voltage of the video signal at the time of alarm non-reporting. May be.

The block diagram which shows an example of the security intercom system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Entrance child machine with a camera 12 ... Camera power supply circuit 14 ... Alarm indicator light circuit 2 ... Monitor apparatus 24 ... Switch 3 ... Security intercom apparatus 4 ... Security sensor L1 ~ L7 ... 1st to 7th line

Claims (3)

An entrance cordless device with a camera (1) installed at the entrance and incorporating a warning indicator lamp circuit (14), a monitor device (2) installed in a living room and displaying an image captured by the entrance cording device with a camera, and the monitor device A security intercom device that is connected and called from the camera-equipped cordless handset and makes a call, and displays an alarm on the alarm indicator light circuit of the camera-equipped cordless handset via the monitor device by an alarm signal from the security sensor (4) (3)
The entrance unit with camera is connected to the monitor device by four lines (L1, L2, L3, L4), and the monitor device is connected to the security intercom apparatus by three lines (L5, L6, L7),
Of the four wires, two wires (L3, L4) are used for calling / calling between the entrance unit with camera and the security intercom device, and the other two wires (L1, L2) are used when no alarm is issued. Is provided with a switch (24) that is used for video signals transmitted to the monitor device and used for supplying power to the alarm indicator lamp circuit when an alarm is issued. Security intercom system characterized by that.   When the alarm is not triggered, the video signal is used for the video signal. When the alarm is triggered, the two wires used for power supply to the warning indicator lamp circuit are polarized, and the video signal when the alarm is not triggered The reference voltage and the reference voltage for power supply to the alarm indicator light circuit at the time of the alarm are reversed, and the camera power supply circuit (12) of the camera entrance slave unit is identified by polarity determination in the camera entrance slave unit. 2. The security intercom system according to claim 1, wherein operation is controlled. The reference voltage of the video signal when the alarm is not triggered and the reference voltage of the power supply to the warning indicator lamp circuit when the warning is triggered are set to separate voltages, respectively, and the voltage discrimination in the entrance unit with the camera 2. The security intercom system according to claim 1, wherein operation of the camera power supply circuit is controlled by the control.

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