JP4654051B2 - Intercom device - Google Patents

Description

  The present invention relates to an interphone device, and more particularly, to an interphone device provided with a base unit that can connect devices such as an entrance child device and a sensor camera to the same terminal.

The intercom device is configured by connecting at least one entrance cordless handset to the living room master unit. In response to the approach of a person such as a suspicious person in addition to the entrance cordless handset, A sensor camera that starts shooting is connected to improve convenience and crime prevention.
The living room master used for such an intercom device requires a large number of terminals so as to correspond to the types and characteristics of the connected devices. Therefore, the number of parts constituting the terminal has increased, and the terminal installation part has to be widened.
Therefore, for example, there is a configuration described in Patent Document 1 in which the number of terminals is reduced without impairing the function. This makes it possible to connect both an entrance slave unit with a camera and an entrance slave unit without a camera to the same terminal of the living room master unit.
Japanese Patent No. 3340649

However, the conventional intercom device disclosed in Patent Document 1 is configured such that a difference occurs in the standby voltage (standby voltage) of the front door unit connected to distinguish between, for example, the presence of a camera and the absence of a camera. The connected device is determined by detecting the voltage. Therefore, in order to prevent malfunction, it is necessary to configure the standby voltage of one device and the operating voltage of the other device not to overlap.
Therefore, in view of such problems, the present invention is a device with different current consumption at the same terminal of the living room master unit, and the standby voltage of one device overlaps the operating voltage of the other device. It is an object of the present invention to provide an intercom device that enables a device to operate normally even if it is.

In order to solve the above-mentioned problem, an invention according to claim 1 is directed to an intercom apparatus having an entrance cordless handset for a visitor to call a resident and a living room base set for responding to a call from the entrance cordless handset. In this case, the living room base unit has a first terminal for connecting the entrance unit, a second terminal for connecting a device such as a sensor camera that starts imaging when a separately installed entrance unit or person is detected, A plurality of standby current supply circuits for supplying a standby current to a device connected to the second terminal, a selection switch for selecting the standby current supply circuit according to the connected device, and a terminal voltage of the second terminal And a determination control means for determining the operating state of the device connected to the second terminal based on the detected voltage value, and the device connected to the second terminal is an entrance cordless handset or an entrance The standby current is set higher than the slave unit. A vessel, waiting receiving flow supply circuit provided two in accordance with the both devices, further selection switch is a switchable electronic switch in the electronic signal, determining the control unit, the selection switch entrance door station When one of the supported standby current supply circuits is selected and a device with a large standby current is connected, it is detected from the voltage information of the voltage detection circuit that the connection is incorrect, In addition to ringing and storing incorrect connection information, if the room base unit is re-powered in an incorrect connection state, the other standby current supply circuit corresponding to the device is selected based on the stored incorrect connection information It is characterized by switching the switch .
With this configuration, devices with different current consumption during standby can be connected using the same terminal, and the number of terminals can be reduced.

Moreover, since it will alert | report if it is erroneously connected, it can recognize rapidly that it is erroneously connected.

Furthermore, since a correct connection state is set by a simple operation of turning on the power again, there is no need to perform a resetting operation.

  According to the present invention, devices with different current consumption during standby can be connected using the same terminal, and the number of terminals can be reduced. In addition, since a correct connection state can be set with a simple operation of turning on the power again, a troublesome resetting operation is not necessary.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of an intercom device according to the present invention. 1 (1a, 1b) is an entrance cordless handset (first entrance cordless handset 1a, second entrance cordless handset 1b), and 2 is a room master phone. As shown in FIG. 1, the entrance child device 1 includes a camera 5 that images a visitor, and the living room parent device 2 includes a monitor 6 that displays an image captured by the camera 5.
The first entrance cordless handset 1a is connected to the first terminal 2a of the living room base phone 2, the second entrance cordless handset 1b is connected to the second terminal 2b, and 3 is replaced with the second entrance cordless handset 1b. The sensor camera which can be connected to the living room main | base station 2 is shown.

  The living room master unit 3 has a circuit configuration as shown in FIG. 2, 11 is a video demodulation circuit that demodulates the transmitted video signal, 12 is a touch panel installed on the monitor screen, and 13 is a touch panel that controls the touch panel 12. Controller, 14 is a microphone, 15 is a speaker, 16 is a call circuit for controlling the microphone 14 and the speaker 15, and 17 is a child that supplies a standby current when the second entrance cordless handset 1b is connected to the second terminal 2b. The machine standby current supply circuit, 18 is a sensor camera standby current supply circuit for supplying standby current when the sensor camera 4 is connected to the second terminal 2b, and 19a is a device connected to the second terminal 2b. A slave unit setting switch as a selection switch for setting the entrance slave unit, 19b as a selection switch for setting the device connected to the second terminal 2b in the sensor camera 3 Sensor camera setting switch, 20 is a voltage detection circuit for monitoring the terminal voltage of the second terminal 2b, 21 is a parent CPU for controlling each circuit of the room parent device 2, 22 is a parent device interface (parent device IF), and 23 is It is an operation power supply circuit for supplying operation power to a connected device.

  However, the slave unit standby current supply circuit 17 and the sensor camera standby current supply circuit 18 are configured to supply different standby currents according to the characteristics of the entrance slave unit 1 and the sensor camera 3, so that the sensor camera standby current supply is provided. The circuit 18 is configured to supply a larger current than the slave unit standby current supply circuit 17. The specific amount of supplied current is set in accordance with the front door 1 and the sensor camera 3 to be connected.

The stand-by current of the entrance cordless handset 1 and the sensor camera 3 is different from that when the entrance cordless handset 1 is in a stand-by state, only a current for turning on an energization indicator lamp (not shown) is supplied. In the case of the sensor camera 3, a current for driving a sensor (not shown) for detecting a person is required in addition to the energization indicator lamp. Is set larger than the entrance cordless handset.
The living room master unit 2 has a power supply circuit (not shown) connected to a commercial power supply, and power is supplied to each circuit of the living room master unit 2 by this power supply circuit. Moreover, although the entrance child device 1 is an entrance child device with a camera, since the camera 5 does not operate at the time of standby, the current consumption is equal to the entrance child device without a camera. For this reason, it is possible to easily connect a front door without a camera.

Next, the operation of the intercom apparatus configured as described above will be described. However, the basic operation of the intercom device, that is, the call operation from the first entrance cordless handset 1a and the response action of the living room base phone 2 are not the gist of the present invention and will be omitted, and the description will focus on the operation of the second terminal 2b. .
A device connected to the second terminal 2b of the living room base unit 2 is selected and set by the selection switches 19a and 19b. The selection switches 19a and 19b are configured by electronic switches and are interlocked. The selection switches 19a and 19b are operated by the control of the master unit CPU 21, and are set by selecting the slave unit setting switch 19a or the sensor camera setting switch 19b by a touch operation on the touch panel 12.

  The master CPU 21 is programmed to turn on the slave setting switch 19a when the power is turned on, and the entrance slave 1 can be connected. In this state, when the second entrance slave unit 1b is connected, a standby current is supplied from the slave unit standby current supply circuit 17 of the living room master unit 2, and the second entrance slave unit 1b lights the energization indicator lamp. . Further, the voltage detection circuit 20 detects a normal terminal voltage, and the apparatus operates satisfactorily (state shown in FIG. 1).

  In this state, when a call operation is performed from the second entrance cordless handset 1b to which the visitor is connected, the standby state is shifted to the activated state, the energization current increases, and the voltage at the second terminal 2b drops. The voltage detection circuit 20 detects this voltage drop and notifies the master CPU 21 that the voltage has dropped. Based on this voltage drop signal, the master unit CPU 21 detects that a call has been made from the second entrance cordless handset 1b, reports a ringing tone from the speaker 15, and supplies an operation power supply circuit to the second entrance cordless handset 1b. The operation power is supplied from 23.

  The second entrance cordless handset 1b receives power supply from the room master unit 2 to drive the camera 5 to start imaging, and transmits the captured image to the room master unit 2. In the room master 2, the received video is demodulated by the video demodulation circuit 11 and displayed on the monitor 6. If the resident performs a call operation such as taking a handset while viewing the displayed video, a call can be made between the second entrance cordless handset 1b and the room base phone 2.

  When the device connected to the second terminal 2b is the sensor camera 3, operation and operation are performed as follows. First, the sensor camera setting switch 19b is turned on by a predetermined operation of the touch panel 12 (the child device setting switch 19a is turned off by this operation). When the sensor camera 3 is connected in this state, the standby current is supplied from the sensor camera standby current supply circuit 18 of the room base unit 2, and the sensor camera 3 turns on the energization indicator lamp and the internal sensor monitors. The state becomes a state where a person can be detected. The voltage detection circuit 20 detects a normal terminal voltage, and the apparatus operates satisfactorily.

When the intruder enters the detection range of the sensor camera 3, the sensor detects a person and shifts from the standby state to the activated state, the energization current increases and the voltage at the second terminal 2b drops. The voltage detection circuit 20 detects this voltage drop, and notifies the master CPU 21 that the voltage has changed. Based on this voltage information, the master CPU 21 recognizes that the sensor camera 3 has detected a person, outputs a notification sound from the speaker 15, and operates the operation power of the sensor camera 3 from the operation power supply circuit 23 to the sensor camera 3. Supply.
The sensor camera 3 is supplied with power from the room master 2 to drive the camera, and transmits the captured image to the room master 2. The room master 2 demodulates the transmitted video by the video demodulation circuit 11 and outputs the image on the monitor 6. By confirming the displayed video, the resident can perform a threatening operation or the like.
In this way, even devices having different current consumption during standby can be connected to the same terminal, so the number of terminals of the room master can be reduced.

Next, the operation when the sensor camera 3 is connected while the setting of the second terminal 2b of the living room master unit 2 is in the state of the entrance slave unit will be described.
When the sensor camera 3 is connected while the slave unit setting switch 19a is on, standby current is supplied from the slave unit standby current supply circuit 17. In this case, as described above, the current consumption of the sensor camera 3 during standby is larger than that of the entrance cordless handset 1, so that just as the sensor camera 3 is connected, the entrance status of the entrance cordless handset 1 is activated. A current flows, and the voltage of the second terminal 2b decreases.

  As a result, the voltage detection circuit 20 detects a drop in voltage and notifies the parent CPU21, and the parent CPU21 determines that a call has been made and reports a ringing tone. However, in the case of this erroneous connection, since the sensor camera 3 has not actually started, this state continues to occur unless the connection is released. Therefore, when the master CPU 21 continues to detect this voltage drop state for a predetermined time, it recognizes that the connection is incorrect and stores the incorrect connection information in the memory. Note that the ringing tone reported at this time results in a notification operation for notifying an erroneous connection.

  Then, upon receiving the report sound of the living room master unit 2, when the resident or the operator recognizes that the setting is incorrect and the power of the living room master unit 2 is turned on again, the parent unit CPU 21 displays the erroneous connection information. Based on this, the sensor camera setting switch 19b is turned on to perform control for switching the selection switches 19a and 19b. As a result, when the power is turned on again, the correct setting state is obtained, and normal operation can be ensured.

  In this way, the master CPU operates as a determination control means for determining the operating state of the connected device at the second terminal, and notifies the user when it is erroneously connected, so that it can quickly recognize that it is an erroneous connection. In addition, since a correct connection state is set by a simple operation of turning on the power again, there is no need for troublesome resetting operations.

In the above embodiment, the erroneous connection detection when the sensor camera 3 is connected in the setting state in which the entrance terminal 1 is connected to the second terminal 2b is performed with a simple configuration using the calling operation. The voltage change at the time of erroneous connection may be changed to a voltage different from the calling voltage, and the erroneous connection and the calling operation may be determined independently. By doing so, the configuration becomes complicated, but it is possible to notify an erroneous connection by an alarm sound different from the ringing sound.
Moreover, although there is only one second terminal 2b, a plurality of the second terminals 2b can be easily provided, and a standby current supply circuit is provided according to the number of terminals, and the selection switches 19a and 19b may be provided accordingly. .
Furthermore, although the case where the connection of the entrance child machine 1 and the sensor camera 3 was shared was demonstrated, it can respond also to the entrance child machines from which a standby current differs, and it can respond also from sensor cameras from which a standby current differs. Moreover, even if the sensor camera 3 has a built-in microphone and speaker, it can be easily handled by matching the set current of the standby current supply circuit with the standby current value of the connected device.

It is a block diagram which shows an example of embodiment of the intercom apparatus which concerns on this invention. FIG. 2 is a circuit block diagram of the living room master device of FIG. 1.

Explanation of symbols

  1 (1a, 1b) ·················································································································· • Circuit, 18 ... Sensor camera standby current supply circuit, 19a ... Slave unit setting switch (selection switch), 19b ... Sensor camera setting switch (selection switch), 20 ... Voltage detection circuit, 21 ... Master unit CPU (Judgment control means).

Claims (1)

In an intercom apparatus having an entrance cordless handset for a visitor to call a resident and an in-home base set for responding to a call from the entrance cordless handset,
The living room master unit includes a first terminal that connects the entrance slave unit, a second terminal that can connect a device such as a sensor camera that starts imaging when a separately installed entrance slave unit or person is detected, A plurality of standby current supply circuits for supplying a standby current to a device connected to the second terminal; a selection switch for selecting the standby current supply circuit according to the connected device; and the second terminal A voltage detection circuit for detecting the terminal voltage of the first and second control means for determining the operating state of the device connected to the second terminal based on the detected voltage value ,
The device connected to the second terminal is an entrance cordless handset, or a device with a standby current larger than that of the entrance cordless handset, and the standby current supply circuit includes two devices for both devices. And the selection switch is an electronic switch that can be switched by an electronic signal ,
When the selection switch selects one of the standby current supply circuits corresponding to the entrance cordless handset and a device in which the standby current is set large is connected, the voltage detection circuit It is detected from the voltage information that an incorrect connection has been made, and the living room master is ringed , and the wrong connection information is stored. An intercom apparatus characterized in that the selection switch is switched to the other standby current supply circuit corresponding to the device based on connection information .

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