JP2005217637A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom system which can operate with no power supply from a commercial power supply not only at the time of waiting but also after calling operation. <P>SOLUTION: A door slave unit 1 is provided with a solar cell 10, a circuit 11 for detecting the amount of its power generation, a slave unit side switch 13 performing on/off operation of power supply from the solar cell 10 to a living room master unit 2, and a slave unit CPU 6 for transmitting a power supply start command to the living room master unit 2 and closing the slave unit side switch 13 if the detection value of the amount of power generation detecting circuit 11 is not lower than a predetermined value. The living room master unit 2 is provided with first and second master unit side switches 19a and 19b performing on/off operation of power supply from a power supply circuit 15, and a master unit CPU 16 performing control for interrupting power supply from the power supply circuit 15 by closing the first and second master unit side switches 19a and 19b upon receiving the power supply start command. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an interphone device, and more particularly to a technique for reducing power consumption of an interphone device by providing a solar battery.

As a conventional intercom apparatus in which a solar cell is provided to reduce power consumption from a commercial power source, there is a configuration shown in Patent Document 1. In this case, a solar cell is provided in a living room base unit, a call operation from the entrance unit is detected based on the generated electric charge, a switch element is turned on, and supply of commercial power is started. This prevents commercial power from being supplied during standby.
JP 2001-285498 A

As described above, the technique disclosed in Patent Document 1 does not receive a commercial power supply during standby, so that power consumption can be reduced. However, after the calling operation, the main power supply is a commercial power supply because it is operated by being supplied from a power supply circuit provided in the living room master unit, and power consumption has not been greatly reduced.
Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide an intercom device that can operate not only in standby but also after call operation without receiving power supply from a commercial power source. And

In order to solve the above-mentioned problems, the invention described in claim 1 includes an entrance cordless handset installed at the entrance, and a room base set installed in the dwelling unit and connected to the entrance cordless handset via a transmission line. An interphone device that supplies power from the commercial power supply to the entrance slave unit via the power source circuit provided in the master unit at the start-up via the transmission line and the commercial power source. A solar cell that can be supplied to the living room parent unit via the child unit and the transmission line, a power generation amount detection circuit that detects the power generation amount of the solar cell, and a child that opens and closes the power supply path from the solar cell to the living room parent unit And a slave unit control means for transmitting a power supply start command to the living room master unit and closing the slave unit switch when the detection value of the power generation amount detection circuit is equal to or greater than a predetermined value. , The living room master unit opens and closes the power supply path from the power circuit A base-side switch to work, characterized by comprising a base unit control means for controlling to turn off the power supply from the power supply circuit to the base-side switch open operation to when receiving the power supply start command.
According to the present invention, the power generated by the solar battery can be supplied not only to the entrance slave unit but also to the living room master unit. Therefore, not only can the power consumption from the commercial power source of the entrance slave unit be reduced, but also the room parent after the calling operation can be reduced. Even in the operation of the machine, it is possible to cover with the generated power of the solar cell, and it is possible to greatly reduce the power consumption from the commercial power source. Further, when the amount of power generated by the solar cell is sufficient, the output of the power supply circuit is cut off by the switch, so that it can be effectively reduced.

The invention of claim 2 includes an entrance cordless handset installed at the entrance, and a living room base set installed in the dwelling unit and connected to the entrance cordless handset via a transmission line. Is an intercom device that supplies power from a commercial power source to a living room main unit and a transmission line via a power supply circuit, and the front terminal sets the generated power via the front terminal and the transmission line. The home base unit includes a solar cell that can be supplied to the home base unit. The home base unit includes a voltage detection circuit that detects the voltage of the transmission line, and a base unit side switch that opens and closes the power supply path from the power circuit. When the detection voltage exceeds the first predetermined voltage, the detection circuit performs a control to turn off the power supply from the power supply circuit by opening the parent device side switch, and the second detection voltage is lower than the first predetermined value. If the value falls below the specified value, close the switch on the master unit side to And performing control to turn on the power supply from the road.
According to the present invention, the power generated by the solar battery can be supplied not only to the entrance slave unit but also to the living room master unit. Therefore, not only can the power consumption from the commercial power source of the entrance slave unit be reduced, but also the room parent after the calling operation can be reduced. Even in the operation of the machine, it is possible to cover with the power generated by the solar cell, and the power consumption from the commercial power source can be greatly reduced. Also, when the amount of power generated by the solar cell is sufficient, the output of the power circuit is cut off by the switch, so it can be effectively reduced, and the on-operation voltage and off-operation voltage of the parent device side switch are different. The chattering operation of the switch can be prevented. Furthermore, since the power generation voltage of the solar cell is detected on the side of the living room base unit, the configuration of the entrance unit can be simplified.

According to a third aspect of the present invention, in the second aspect of the present invention, the room base unit includes a backflow prevention element that prevents the power supplied from the solar battery from flowing into the power supply circuit.
According to this invention, even if the power generation voltage of the solar cell becomes larger than the output voltage of the power supply circuit, the power supply circuit does not deteriorate.

According to a fourth aspect of the invention, in the second or third aspect of the invention, the first predetermined value is a voltage value higher than the output voltage of the power supply circuit.
According to this invention, it is easy to make the first predetermined value based on the output voltage of the power supply circuit, and it is easy to determine that power can be supplied from the solar cell.

The invention of claim 5 is the invention according to any one of claims 2 to 4, wherein the second predetermined value is a voltage value lower than the output voltage of the power supply circuit.
According to this invention, it is easy to make the second predetermined value.

In this way, the power generated by the solar battery can be supplied not only to the main unit of the living room but also to the main unit of the living room. It becomes possible to cover the parent machine with the power generated by the solar cell. As a result, it is possible to reduce the power consumption from the commercial power source and reduce the power usage fee.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a first embodiment of an intercom apparatus according to the present invention. 1 is an entrance cordless handset installed at the entrance, 2 is a room base set installed in the dwelling unit, and both are transmission lines. 3 is connected.
The entrance slave unit 1 communicates with the room master unit 2 through the transmission line 3 and transmits a power to the slave unit interface circuit 5 and a slave unit as a slave unit control means for controlling each circuit of the entrance unit 1. CPU 6, handset unit 7 for calling with living room base unit 2 having microphone and speaker, call button 8 for calling a resident, call detection circuit 9 for detecting a call operation, solar battery 10, solar A power generation amount detection circuit 11 for detecting a voltage as a power generation amount of the battery 10, a power supply path 12 for supplying the generated power of the solar battery 10 to the living room base unit 2, and a power supply path 12 provided in the power supply path 12. A slave unit side switch 13 that is controlled by the CPU 6 to turn on / off the power supply to the living room master unit 2 is provided.

  The base unit 2 communicates with the main unit 1 via the transmission line 3 and transmits power to the main unit interface circuit 14, connected to a commercial power source, and connected to each circuit of the main unit 2 and the front unit. A power supply circuit 15 for supplying power, a base unit CPU 16 as a base unit control means for controlling each circuit of the room base unit 2, a base unit call unit 17 having a microphone and a speaker and having a phone call with the entrance unit 1 A first power supply path 18a for supplying power from the power supply circuit 15 to the entrance cordless handset 1, a second power supply path 18b for supplying power from the power supply circuit 15 to each circuit of the room base unit, and the base unit CPU 16 Is controlled by the first master unit side switch 19a for controlling on / off of the power supply to the entrance cordless handset 1 and second controlled by the master unit CPU 16 for controlling on / off of the power supply to the living room base unit 2. It has a master unit side switch 19b .

The intercom apparatus configured as described above operates as follows. Note that the call operation by the call button 8 that is the basic operation of the intercom device and the call operation between the base unit call unit 17 and the slave unit call unit 7 due to the response are omitted because they are not the gist of the present invention. The operation of the power supply unit centering on the battery 10 and the power supply circuit 15 will be described.
First, when the intercom device is activated, the first and second parent device side switches 19a and 19b are in a closed state, and the child device side switch 13 is in an opened state. Power is supplied to the entrance cordless handset 1 through each circuit and the transmission line 3. In this state, power generation is started when the solar cell 10 is irradiated with sunlight. This power generation voltage is detected by the power generation amount detection circuit 11, and the power generation voltage is monitored by the slave CPU 6. When the generated voltage exceeds a predetermined value, the slave CPU 6 sends a power supply start command to the living room master 2 and transmits the command to the living room master 2 via the slave interface circuit 5 and the transmission line 3. At the same time, the slave CPU 6 closes the slave side switch 13. The predetermined value only needs to be at least a voltage that can satisfactorily drive the living room master unit 2, and is usually set to the output voltage of the power supply circuit 15.

  On the other hand, the base unit 2 receives the transmitted power supply start command by the base unit CPU 16 via the base unit interface circuit 14. When receiving the power supply start command, the master unit CPU 16 opens the first and second master unit side switches 19a and 19b, and supplies power from the power supply circuit 15 to each circuit of the entrance slave unit 1 and the room master unit 2. Shut off. As a result, power is supplied from the solar cell 10 to the living room base unit 2 via the power generation amount detection circuit 11, the handset side switch 13, and the handset interface circuit 5, and power supply from the power supply circuit 15 is eliminated.

  When the power generation voltage detected by the power generation amount detection circuit 11 becomes equal to or lower than a predetermined value, the slave CPU 6 sends a power supply stop command to the room master 2. The power supply stop command is sent to the living room master unit 2 via the slave unit interface circuit 5 and the transmission line 3 and received by the master unit CPU 16 via the master unit interface circuit 14. Receiving the power supply stop command, the master CPU 16 closes the first and second master switches 19a and 19b and resumes power supply from the power supply circuit 15. At the same time, the slave unit CPU 6 opens the slave unit side switch 13. As a result, the power supply from the solar cell 10 is stopped, and power is supplied from the power supply circuit 15 to the entrance slave unit 1 and the room master unit 2.

In this way, when the power generation voltage of the solar cell exceeds the predetermined value, the generated power is supplied not only to the Genma handset but also to the living room base unit. It is possible to operate the intercom device without doing so, and power consumption from the commercial power supply can be greatly reduced. Further, when the amount of power generated by the solar cell is sufficient, the output of the power supply circuit is cut off by the switch, so that it can be effectively reduced.
When the solar cell does not have a sufficient amount of power generation, commercial power is also supplied to the entrance unit via the power supply circuit of the living room master unit, so that the operation of the apparatus does not become unstable.

In FIG. 1, the power generated by the solar cell 10 is constantly supplied to the entrance slave unit 1. However, when the slave unit side switch 13 is opened by providing a switch linked to the slave unit side switch 13. May be opened in the same manner to block the power supply path from the solar cell 10 to each circuit of the door unit 1. Further, each circuit from the slave unit interface circuit 5 to the entrance slave unit 1 has a power supply path for supplying power from the living room master unit 2 via the transmission line 3, but this is omitted here. .
Furthermore, here, the power generation amount is set to one predetermined value, and below the power generation amount, power is supplied from the power supply circuit 15 to both the front cordless handset 1 and the living room base unit 2. However, when the entrance slave unit 1 can be driven but the room master unit 2 cannot be driven, the operations of the first and second master unit side switches 19a and 19b may be operated independently. In this case, only the power of the living room master unit 2 is supplied from the power supply circuit 15. That is, it is preferable to close only the second parent device side switch 19b, and the usage amount of the commercial power supply can be kept to a minimum by doing so.

(Second Embodiment)
The block diagram of FIG. 2 shows a second embodiment of the intercom apparatus according to the present invention, in which 21 is an entrance cordless handset installed at the entrance, 22 is a room base set installed in the dwelling unit, and both are transmission lines 23. Connected with.
The entrance cordless handset 21 includes a handset interface circuit 25 for communicating with the room base phone 22 via the transmission line 23 and transmitting electric power, a handset for communicating with the room base phone 22 having a microphone and a speaker. A call unit 27, a call button 28 for calling a resident, a call detection circuit 29 for detecting a call operation, and a solar battery 30 are provided. The solar cell 30 is configured to supply power to each circuit of the entrance slave unit 21 through a power supply path (not shown), and can send power to the transmission line 23 via the slave unit interface circuit 25. It has a configuration.

  The room master unit 22 communicates with the entrance slave unit 21 via the transmission line 23 and is connected to a base unit interface circuit 34 for transmitting power and a commercial power supply to each circuit of the room master unit 22 and the entrance slave unit. A power supply circuit 35 for supplying power, a parent device communication unit 37 having a microphone and a speaker for making a call with the entrance terminal 21, and a first power supply for supplying power from the power circuit 35 to the entrance terminal 21 Controlled by the path 38a, the second power supply path 38b for supplying power from the power circuit 35 to each circuit of the room base unit 22, the voltage detection circuit 39 for detecting the voltage of the transmission line 23, and the voltage detection circuit 39. A first parent device side switch 40a that controls on / off of the power supply to the child device 21, and a second parent that controls the power supply to the living room parent device 22 by being similarly controlled by the voltage detection circuit 39. Machine side switch 40 It is equipped with a. Reference numerals 41a and 41b denote diodes as current backflow prevention elements.

The intercom apparatus configured as described above operates as follows. Note that the call operation by the call button 28, which is the basic operation of the intercom device, and the call operation between the parent device call unit 37 and the child device call unit 27 by the response are omitted because they are not the gist of the present invention. The operation of the power supply unit centering on the battery 30 and the power supply circuit 35 will be described.
First, when the intercom device is activated, the first and second master-side switches 40a and 40b are in a closed state, and the power supply circuit 35 connects each circuit of the room master unit 22, the master unit interface circuit 34, and the transmission line 23 to each other. A DC power supply of approximately 11 volts is supplied to the entrance cordless handset 21 via the via. In this state, power generation is started when the solar cell 30 is irradiated with sunlight. This generated voltage is detected by a voltage detection circuit 39 that detects the voltage of the transmission line 23.

  Then, when the detected voltage exceeds 12 volts (first predetermined value), the voltage detection circuit 39 opens the first and second parent device side switches 40a and 40b and opens the entrance slave unit 21 and the living room from the power supply circuit 35. The power supply to each circuit of the base unit 22 is cut off. As a result, power is supplied from the solar cell 30 to the room master unit 22 via the slave unit interface circuit 25 and the transmission line 23, and power supply by the power source circuit 35 is eliminated. When the detected voltage falls below 10 volts (second predetermined value), the first and second parent-side switches 40a and 40b are closed and the power supply from the power supply circuit 35 is resumed.

In this way, in the state where the power generation voltage of the solar cell exceeds the predetermined value, the generated power is supplied not only to the Genma handset but also to the living room base unit, so a commercial power source should be used even in the call operation after the call operation. It is possible to operate the intercom device without any problem, and the power consumption from the commercial power source can be greatly reduced. Further, when the amount of power generated by the solar cell is sufficient, the output of the power supply circuit is cut off by the switch, so that it can be effectively reduced. When the solar cell does not have a sufficient amount of power generation, commercial power is also supplied to the entrance unit via the power supply circuit of the living room master unit, so that the operation of the apparatus does not become unstable.
Furthermore, since the closing operation voltage and the opening operation voltage of the first and second parent device side switches are different, chattering operation that the supply from the power supply circuit and the solar battery is frequently switched can be prevented, and the living room parent device side Since the power generation voltage of the solar cell is detected, the configuration of the entrance cordless handset can be simplified.
In addition, since the first predetermined value is set higher than the output voltage (11 volts) of the power supply circuit, it can be easily detected that the solar cell is sufficiently generating power based on the output voltage of the power supply circuit. However, since the second predetermined value is set lower than the output voltage of the power supply circuit, it is easy to obtain the set value.
Furthermore, even if the power generation voltage of the solar cell is higher than the output voltage of the power supply circuit when the first and second master switches are closed by the diode provided at the output section of the power supply circuit, the power supply circuit is adversely affected. There is no such thing.

In the second embodiment, the power generated by the solar cell 30 is always supplied to the entrance cordless handset 21, but a switch is provided so that the first and second base unit side switches 40a and 40b are connected. When the base unit side switches 40a and 40b are closed by the control signal of the voltage detection circuit 39 to be controlled, the base unit side switches 40a and 40b may be opened to block the power supply path from the solar cell 30 to each circuit of the entrance unit. In addition, the entrance cordless handset 21 has a power supply path through which power is supplied from the living room base phone 22 via the handset interface circuit 25 and the transmission line 23, but is omitted here.
Furthermore, when the power generation voltage of the solar cell 30 falls below 10 volts (second predetermined value), power is supplied from the power supply circuit 35 to both the entrance slave unit 21 and the room base unit 22. By providing a third predetermined value between the value and the second predetermined value, the operations of the first and second parent-side switches 40a and 40b may be operated independently. In this case, it is preferable to supply only the power of the living room master unit 22 from the power supply circuit 35, that is, only the second master unit side switch 40b is closed, so that the amount of commercial power used can be kept to a minimum. it can.

The block diagram of FIG. 3 shows a modification of the intercom device of the first embodiment. In FIG. 3, 44 is a power storage device that stores the electric power generated by the solar cell 10, 45 is a power storage amount detection circuit that detects the amount of power storage, 46 is a camera that images a visitor, 47 is a video modulation circuit, and 48 is a video. A demodulating circuit 49 is a television monitor that displays the image picked up by the camera, and the same components as those in FIG.
In this way, by providing a power storage device and storing the amount of power generated by the solar battery, even if power generation by the solar battery is insufficient, the charge stored in the power storage device can be used as a power source, and the frequency of using the power circuit is further increased. It becomes possible to further reduce the amount of commercial power used. In addition, even an interphone device equipped with a camera and a monitor thereof can be provided with a solar cell in the entrance cordless handset to reduce power consumption.

  FIG. 4 shows a modification of the intercom apparatus according to the second embodiment. Similarly to FIG. 3, the entrance slave unit 21 is provided with a camera 46 and a video modulation circuit 47, the living room master unit 22 is equipped with a video demodulation circuit 48, a television set. A monitor 49 is provided. Thus, even if the interphone device of the second embodiment is provided with a camera and its monitor and the interphone device is configured, the intercom device can be easily handled, and the solar cell can be provided in the front door unit to reduce power consumption.

It is a block diagram which shows 1st Embodiment of the intercom apparatus which concerns on this invention. It is a block diagram which shows 2nd Embodiment of the intercom apparatus which concerns on this invention. It is a block diagram which shows the modification of the intercom apparatus of FIG. It is a block diagram which shows the modification of the intercom apparatus of FIG.

Explanation of symbols

  1 .. Entrance cordless handset, 2 .. Living room master phone, 3 .. Transmission line, 6 .. Slave CPU (slave unit control means), 10 .. Solar cell, 11. Power supply path, 13 ·· Slave unit side switch, 15 ·· Power supply circuit, 16 ·· Master CPU (master control means), 18a ·· First power supply path, 18b ·· Second power supply path, 19a .. First master unit side switch (master unit side switch), 19b .. Second master unit side switch (master unit side switch), 21 .. Entrance cordless handset, 22 ... Room room master unit, 23 ... Transmission line , 30 .. solar cell, 35 .. power supply circuit, 38 a .. first power supply path, 38 b .. second power supply path, 39... Voltage detection circuit, 40 a. Side switch), 40b ··· second master unit side switch (master unit side switch), 41a, 41b · · diode (backflow prevention element) ).

Claims (5)

An entrance cordless handset installed at the entrance, and an in-unit base unit installed in the dwelling unit and connected to the entrance cordless handset via a transmission line, and at least at the time of start-up by a power circuit provided in the in-room base unit An intercom device that supplies power from a commercial power source to the entrance cordless handset via the living room base unit and the transmission line,
The entrance unit includes a solar cell capable of supplying generated power to the living room base unit via the entrance unit and the transmission line, a power generation amount detection circuit that detects a power generation amount of the solar cell, and When the detection value of the slave unit side switch for opening and closing the power supply path from the solar battery to the room base unit and the power generation amount detection circuit is equal to or greater than a predetermined value, a power supply start command is sent to the room base unit A slave unit control means for transmitting and closing the slave unit side switch;
The living room master unit is configured to open and close the power supply path from the power supply circuit, and when the power supply start command is received, the base unit side switch is opened to supply power from the power supply circuit. An intercom apparatus comprising a base unit control means for performing control to turn off. A power supply circuit provided in the living room parent machine at least at the time of start-up, comprising: An intercom device that supplies power from the commercial power supply to the entrance cordless handset via the living room base unit and the transmission line,
The entrance unit includes a solar cell capable of supplying the generated power to the room base unit via the entrance unit and the transmission line,
The living room base unit includes a voltage detection circuit that detects a voltage of the transmission line, and a base unit side switch that opens and closes a power supply path from the power circuit,
When the detected voltage exceeds the first predetermined voltage, the voltage detecting circuit performs control to turn off the power supply from the power supply circuit by opening the parent device side switch, and the detected voltage is the first predetermined voltage. An interphone device that performs control to turn on the power supply from the power supply circuit by closing the parent device side switch when the value falls below a second predetermined value lower than the value. The intercom apparatus according to claim 2, wherein the living room base unit includes a backflow prevention element that prevents power supplied from the solar battery from flowing into the power supply circuit. The intercom apparatus according to claim 2 or 3, wherein the first predetermined value is a voltage value higher than an output voltage of the power supply circuit. 5. The intercom apparatus according to claim 2, wherein the second predetermined value is a voltage value lower than an output voltage of the power supply circuit.

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