JPS5952959A - Interphone - Google Patents

Abstract

PURPOSE:To turn on the power supply to a rice cooker, radio, etc., at a prefixed time, by providing a clocking means which generates an information signal when a prefixed time comes. CONSTITUTION:A transmission start signal which represents the starting of transmission, data which represents house codes, and a sound signal for talking are transmitted and received through a commercial power line 3. On the other hand, the time setting of a clocking circuit 41 is controlled by a signal inputted from a time setting circuit 14 through a processing device 30 and a signal from a knob 21 for setting the present time. When an operation changeover switch 16c is operated, a pilot lamp 21c lights and when a preset time has come thereafter, the pilot lamp 21c is turned off and an electric power is supplied to output plug sockets 20 and 120. These loads are, for example, a rice cooker, radio, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interphone that allows a base unit and a slave a to talk over a power line.

In such a so-called power line transport type interpon,
Telephone calls can be made using commercial power lines that are already installed in ordinary homes. Either the base unit or the slave unit sends a high frequency signal of, for example, 200 kHz to 450 kHz frequency modulated by the audio signal to the commercial power line, and the other of the base unit or slave unit transmits this high frequency signal from the power line. It separates, demodulates, and outputs audio. The interphone that uses the commercial power line for transmitting and receiving high-frequency signals has the following excellent advantages.

(d) No special wiring is required between the parent unit 45 and the slave unit, and the installation of the master unit and slave units is extremely simplified regardless of whether the building is newly built or an existing building. If dedicated wiring is required, wiring work within the house is required, and in such work, the line is generally buried inside the house, so
The construction work will be complicated.

In addition, if a connection error is discovered after wiring,
In the case of embedded work, it is extremely difficult to repair.

(b) The installation location of the base unit and slave unit can be arbitrarily selected. The master unit and the slave unit can be installed anywhere in the house where there is a power outlet for the power line, and the master unit and the slave unit can be easily moved.

(c) Furthermore, the base unit and slave unit can be used according to one's daily life pattern; for example, the base unit and slave unit can be placed in the kitchen in the morning and evening, and in the bedroom at night, which is extremely convenient. It is.

In such an intercom, at a predetermined time,
If it were possible to generate a warning sound to remind people of others, the uses of the Interpon would be further expanded.

SUMMARY OF THE INVENTION An object of the present invention is to provide an interphone that can generate a notification sound at a predetermined time, for example as a wake-up call.

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a block diagram thereof. The base unit 1 and the slave unit 32 can communicate as an interphone via the flexible power line 3, and can communicate with each other as described later. The commercial power line 3 is provided with power outlets 4 and 5. A power cord 6 is connected to the base device 1, and a plug 7 is connected to the tip of the power cord 6. By connecting the plug 7 to the power outlet 4, the power cord 6
and the commercial power line 3 are electrically connected. Components of the slave unit 2 corresponding to the base unit 1 are shown with a numerical value “1” in the 100th place. The power cord 6.106 supplies power to the base unit 1 and the slave @2, and also serves to transmit a high frequency signal frequency-modulated by an audio signal or the like when used as an interphone or the like.

To explain the configuration of the base unit 1, the high frequency signal from the power cord 6 is separated/combined by the coupling circuit 31 and the same *ra
be done. The high frequency signal from the coupling circuit 31 is demodulated by the Shun θj-circuit 32, and the audio signal is sent to the low frequency amplifier circuit 3.
given to 4. The transmission/reception changeover switch 25 includes a so-called talk switch 12 that is operated when transmitting a call as an intercom, and supplies the audio signal from the low frequency amplification circuit 34 to the speaker/microphone 11 that serves as both a speaker and a microphone to output the audio. I can hear it. The audio signal from the speaker/microphone 11 is fed from the transmission/reception switching circuit 25 to the low frequency amplification circuit 35, where it is amplified and then modulated by the modulation circuit 36.
The frequency is modulated in the power amplifier circuit 37, the power amplifier circuit 37 amplifies the power, and the power cord 6 and the power plug 7 are connected from the coupling circuit 31 to the power cord 6 and the power plug 7.
and is sent out to the commercial power line 3 via the power outlet 4.

A signal having a carrier frequency from a high frequency oscillation circuit 33 is provided in conjunction with the demodulation circuit 32 and the modulation circuit 36. The channel selector 13 changes the oscillation frequency of the high frequency oscillation circuit 33, and can specifically communicate with the handset 2 using the high frequency signal selected by the channel selector 13. In this way, the channel selector 13
Accordingly, if there are multiple handsets 2, one of those handsets
You can choose to communicate with one person. Further, in such an interpon system, when different systems use a common commercial power line 3, the channel selector 13 can hide the carrier frequency of the high frequency signal to avoid interference.

The transmission/reception switching circuit 38, which also serves as the interface 7/8, is
Demodulation circuit 32, low frequency amplification circuits 34, 35, modulation circuit 3
6 and the transmission/reception changeover switch 25,
A processing device 30 implemented by a microcomputer or the like switches the transmission and reception operations of the base unit 1.

A house code setting circuit 19 is connected to the processing device 30 . If such an intercom system is used in a neighboring house, the intercom system in each house will malfunction. To prevent this malfunction, t[J
Set the house code for communication between 1 and handset 2,
By allowing a call only when the house food included in the received signal matches the house code of the house, malfunction of the intercom system of each house is prevented.

The high frequency signal sent to the curved power line 3 includes a transmission start signal indicating the start of transmission, and a voice signal for data and telephone calls, but does not indicate a house code. The clock circuit 41 is
The timing operation part of the clock is implemented using a large-scale integrated circuit or the like, and its output is visually displayed on a display 10.

The time setting of the clock circuit 41 is controlled by a signal from the knob 21 for setting the current time, such as a signal from the time setting circuit 14 operated for an alarm, etc., which will be described later, via the processing device 30. . The time setting circuit 4 includes a time knob 14a for making settings in units of hours, and a minute knob 4b for making settings in units of minutes. Reservation switch 1
5 generates the sound of the base unit 1 or the handset 2 at a predetermined time to activate (a) a wake-up mode for achieving a function such as an alarm, or (b) 'a' at a predetermined time. Loads 22, 12 connected to machine 1 or slave machine 2
2 is operated to effect a load control mode of energizing or de-energizing. The check switch 17 displays the time set by the time setting circuit 14 on the display q:5.
Displayed on LO and operated to reach 4+ (6m).

The operation selector switches 16a, 16b, 16c are the load 22
, 122 and 1 indicator light 21.
A, 21b, and 21c have individual copper ratios. The operation selector switch 16a is operated to constantly output commercial power to the output outlet 20 of the master unit 1 or the output outlet 120 of the slave unit 2, and in the following explanation, it is referred to as the ``instantly on switch''. There is. At this time, the indicator light 21a
is lit, and indicator lights 211) and 21 (14 are off).

Operation UJ 1i1 switch 16b is the output outlet) 2
Operated to always cut off commercial power at 0°120,
In the following explanation, it may be referred to as an always-off switch. At this time, the indicator light 21b is lit, and the indicators 21a, 2
1c is off. The operation selector switch 16c is operated until the time reserved by the time setting circuit 14 is reached.
Output Funcent 2o.

No commercial power is supplied to 120, and the reserved 1
At +6 o'clock, it is operated to supply commercial power, and may be referred to as an interlocking on switch in the following explanation. When the operation selector switch 16Q is operated, the indicator light 21c is lit before the set time (approximately 1 hour), and the indicator lights 21a,
21b is off.

At the scheduled time, the indicator lights 21b and 21C are turned off, and the indicator light 21a is turned on to indicate that 1d power is being supplied to the output outlets 20 and 120.

The loads 22, 122 are rice cookers, radios, etc. When using a rice cooker, the rice cooker will start cooking at the scheduled time, and then the rice cooker will keep warm. Indicator light 1
8 lights up when the reservation switch 15 is operated.

FIG. 3 is a flowchart for explaining the operation of the base unit 1. The process moves from step n1 to step n2, and initial settings are performed. In step n3, the knob 21 is operated to set the contents of the clock circuit 41 to the current time of A1:. As a result, the display device 1() displays the current time being clocked by the clock circuit 41. In the next step n5, the house code is set by the house code setting circuit 19, and in step 116, the demodulation circuit 32 and the low frequency amplification circuit 34 are activated and become ready for intercom reception, and at this time the low frequency amplification circuit 35 and the key circuit 36 are in a dormant state, and the transmission/reception changeover switch 25 allows the audio signal from the low frequency amplification circuit 34 to be given to the speaker/microphone 11. Thereafter, in step n7, it is determined whether or not there is a call from the caller 2, and if there is no call, the process moves to step n8, and it is determined whether or not the reservation switch 15 has been operated, that is, the intercom mode, alarm mode, or load control mode. . If it is the interphone mode, the process moves to step 119, and it is determined whether the talk switch 12 has been operated to call the handset 2.

When the talk switch 12 is operated, step n
Moving to IO, the demodulation circuit 32 and the low frequency amplification circuit 34 are put into a rest state, and the modulation circuit 36 is put into an operating state, thus becoming ready for transmission. At this time, the low frequency amplifier circuit 35 is inactive, and the switching mode of the transmission/reception changeover switch 25 does not change.

In step nil, the processing device 30 reads the house code from the house code setting circuit 19 and creates a code signal for generating a ring tone in the handset 2. Thus, in step n12, the processing device 30 sends out a calling signal consisting of a house code and a ringing tone code. As a result, in step n13, the calling signal is frequency-modulated by the modulation circuit 36. step n
13a, a carrier wave from the high frequency oscillation circuit 33 having a carrier frequency selected by the channel selector 13 is modulated by the paging signal. In step n14, the power amplification circuit 37 and the coupling circuit 31 act to send a high frequency signal to the commercial line of force 3. step n
At step 15, the processing device 130 maintains the high frequency signal transmission state for a predetermined period of time, for example, about 2 seconds.

After this transmission time, which is approximately 2 seconds, has elapsed, step n
16, it is determined whether the talk switch 12 is no longer operated. If the talk switch 12 has been operated to reach the level of haze, the process waits in step n16. When the talk switch 12 is no longer operated, step n17
Then, as in step n6, the intercom operation becomes ready for reception. Therefore, in step n18, if it is determined whether there is a response from the handset 2, step n1
9, the high frequency signal from the handset 2 is received via the coupling circuit 31, and in step n20, the high frequency signal from the handset 2 is converted by the action of the demodulating circuit 32.

In step n20a, demodulation is performed using a signal from the high frequency oscillation circuit 33 having a carrier frequency determined by the channel selector 13, and thereby, when a plurality of handsets 2 are installed, the desired handset 2 and Calls can be made. In the next step n21, the low frequency amplifier circuit 3
4, the audio signal from handset 2 is sent to the speaker/
It is generated from the microphone 11. In step n22, the handset 2
It is determined whether or not the call has ended. If the call is in progress, the process returns to step n19, and if the call has ended, the process moves to step n23.

In step n23, 1·-x inch 1 in base unit 1
2 has been operated, and if it has been operated, the process moves to step n24, the low frequency amplification circuit 35 and the modulation circuit 36 are put into operation, and the audio signal from the speaker/microphone 11 is switched to low frequency from the transmission/reception changeover switch 25. The signal is applied to the frequency amplification circuit 35 to enable transmission of interphone operation. Therefore, in step n25, an audio signal from the speaker/microphone 11 is input. Frequency modulation is performed in step n26. In step n26&, the carrier frequency is modulated by the cooperation of the channel selector 13 and the high frequency oscillation circuit 33. This high frequency signal is sent from the power amplification circuit 37 to the line of force 3 through the coupling circuit 31 . When it is detected in step n28 that the talk switch 12 is no longer operated, step n28
Move on to 17. When the talk switch 12 is being operated, the process returns from step n28 to step n25.

When there is no response from the handset 2 in step n18, in step n80 a predetermined call end time after the high frequency signal from the handset 2 disappears, for example, about 1 hour.
After 0 seconds have elapsed, the process moves from step n80 to step n6. If the talk switch 12 is not operated in step n23, it is determined in step n29 whether the call end time of the handset 2, for example about 10 seconds as described above, has elapsed, and if so, the process returns to step n6.

When there is a call from the handset 2 in step n7, the process moves to step n38, where the high frequency signal from the handset 2 is received by the coupling circuit 31, and in the next step n39, the signal is determined by the channel selector 13 and the high frequency oscillation circuit 33. The demodulation circuit 32 demodulates the high frequency signal from a specific handset 2 corresponding to the channel to be transmitted, and the high frequency signal from the handset 2 is decoded in step n40.

If it is determined in step n41 that the high frequency signal from the handset 2 matches the house code set by the house code setting circuit 19, step n41
42, the processing device 30 memo! The contents of J30a are read to create a ringing tone, and in step n43, the ringing tone is applied from the low frequency amplification circuit 34 to the speaker/microphone 11 to make it sound.

The memory 30a records intercom operation ring tones and other notification sounds, such as "woo woo" in the event of a fire, "bibo pivo" in an emergency, "bibi" in the event of a criminal intrusion, and "piyu pyuyu" in the event of a gas leak. ,
The ring tone codes are stored in advance in correspondence with the ring tone codes included in the high frequency signals manually inputted via the commercial power line 3.

In the inkphone operation, a ring tone suitable for the intercom is created in step n42.

In step n44, the processing device 3
0. If the time has elapsed, the process moves to step n45, and it is determined whether the talk switch 12 has been operated. When the talk switch 12 is operated, the process moves to step n24, and the interphone operation becomes ready for transmission. If the talk switch 12 has not been operated, the process moves to step n46, where it is determined whether the call end time, for example, about 10 seconds has elapsed as described above, and
If it has elapsed, the process returns to step n6.

In step n8, when it is determined that the reservation switch 15 is operated and a reservation operation is to be performed, the process moves to step n48, and the indicator light 18 is turned on. Then step n
49, the time knob 1 in the time setting circuit 14
4a and the minute knob 14b, the time at which a notification sound should be generated in the wake-up mode or when the loads 22, 122 should be operated in the load control mode is set. In step n50, the reservation switch 15 is operated again and it is determined whether the reserved operation is canceled or not. If it has been released, the process moves to step n47, the display f:J'18 is turned off, and the process moves to step n9.

When a reserved operation is to be performed, the process moves from step n50 to step n51, and it is determined whether or not there is a calling signal from the handset 2.

If there is a calling signal, the process moves to step n38; otherwise, the process moves to step n52. In step n52, it is determined whether or not the check switch 17 has been operated. When the check switch 17 is operated, in step n64, the display 10 displays the [)II membrane setting time for a predetermined time of 5 to 10 seconds, and in the next step n65, the current display is returned to and the step Move on to n53. When the operation of the check switch 15 is released, the process also moves from step n52 to step n53. It is determined whether the talk switch 12 is being operated or not, and if it is being operated, the process moves to step nlO. If the talk switch 12 has not been operated, the process moves to step n54, where it is determined whether or not the set time matches the current time, and when they match, the process moves to step n55.

In step n55, it is determined whether the handset stop switch 24 connected to the processing device 30 has been operated.

The handset stop switch 24 is operated to stop the notification to the handset 2, so that only the base unit 1 performs the notification. For example, it is operated like a kitchen timer to notify the cooking time, the amount of water in the bath, the heating time of the bath water, etc., and the notification is made by the main unit 1 installed in the kitchen or the like. When the handset stop switch 24 is operated to indicate that there is no need to notify the handset 2, the process moves to step n56. A load 22 is connected to the output outlet 20, and the operation selector switches 16a, 16
If at least one of the switches b and 16c is being operated, the process moves to step n66; otherwise, the load 22 is not connected to the outlet 20 and all of the operation selector switches 16a, 16b, and 16c are not being operated. If not, the process moves to step n57.

In step n57, the memory 30a reads out the sound code corresponding to the wake-up mode by the operation of the processing device 30, generates a notification sound, amplifies it by the low frequency amplification circuit 34, and outputs the notification sound from the speaker/microphone 11 via the transmission/reception switch 25. occurs.

In step n58, it is determined whether the stop switch 23 for stopping the generation of the notification sound has been operated when the notification sound is not required. This stop switch 23 is operated on holidays such as Sundays to take a leisurely nap in the morning. When the stop switch 23 is not operated, the notification sound is emitted from the processing device 30 in step n59.
This occurs for a predetermined period of time, and then the process moves to step n60. If the stop switch 23 is being operated, the process moves to step n60. In step n60, the generation of the notification sound is stopped, and in the next step n61, it is determined h3i whether or not the reservation switch 15 has been operated. The reserved action is activated by that operation! If it is, the process goes to step n62'4f to cut off the power supply to the output outlet 20, the indicator light 21c is kept extinguished in step nC13, and the process goes to step n78.
Move to. If the reservation switch 15 remains operated in step n61 and the reservation operation is to be continued, the process moves to step n49.

When controlling the output outlet 20 to control the load in step n5G, the process moves to step n66, where it is determined whether or not the interlocking on switch 16c is operated (1i).
I will be treated. When the interlocking ON switch 16C is operated, the indicator light 21c is turned on in step n67, and power is supplied from the output outlet 20 to the load 20 in step n68. In the next step n57, a notification sound is generated. When the interlocking on switch 16c is not operated, the process moves to the next step n69, and it is determined whether the always on switch 16a is operated.

When the always-on switch 16a is being operated, the process moves to step n70, where the indicator light 21a is turned on, and the process continues to supply power from the output outlet 20 to the load 22, and the process moves to step n71. When the always-on switch 16a is not operated and the always-off switch 16b is operated, the indicator light 21b lights up in step n72, and the process moves to step n, 73, where the load 22 is turned on from the output outlet 2o.
The power to the computer remains cut off, and the process moves to step n74.

In step n74, it is determined 111i whether or not the interlocking on switch 16c has been operated. If it has been operated, the process moves to step n75, where the indicator light 21b is turned off and the indicator light 21
Turn on c. Therefore, the process moves to step n76, and the power supply to the output outlet 2o is cut off. When 1L power is not supplied to the output outlet (output outlet) 20, the same state is maintained. In step n77, reservation switch 1
5 was operated and the reserved operation was canceled, but it is judged 11
J1, and if the reserved operation has not been canceled, the process moves to step n49. If it has been released, the process moves to step n78, where the indicator lamp 21c is turned off, and the indicator lamp 18 is turned off at step n79. If the interlocking on switch 16c is not operated in step 1174, the process moves to step n69, and it is determined that either the always-on switch 16a or the always-off switch 16b has been operated. Since the interlocking ON switch]-6c is operated in step n74, the indicator lights 21a and 21b go out in step n75, the indicator light 21c lights up, and the power supply to the output outlet 20 is cut off in step n76. . Thereafter, when the set time and the current time match in step n54, power is supplied to the output outlet 20 in step n68.

In step n55, if the handset stop switch 24 is not operated and a notification indicating that the set time and the current time match should be sent to the handset 2, the process moves to step n30. In this way, the demodulation circuit 36 of the base unit 1 is activated, and the low frequency amplification circuits 34 and 35 are deactivated and enter the transmitting state. Therefore, in step n31, the processing device 30 reads the house code from the house code setting circuit 19 and creates it based on the contents stored in the code memory 30a representing the notification sound. In step n32, the processing device 30 creates a signal indicating whether power should be supplied to the output outlet 120 of the slave unit 2. The house code, the notification tone code, and the signal for the output outlet 120 from the processing device 30 are sent out from the processing device 30 in step n33, and frequency-modulated by the modulation circuit 36 in step n34. This carrier wave is determined by the channel selector 13 and the high frequency oscillation circuit 33 in step n34a. Step 7135
Then, the high frequency signal kj from the dagger amplifier circuit 37 is led out from the coupling circuit 31 to the commercial power line 3, and its transmission state is maintained in the processing device 30 for a predetermined time in step n36.

As a result, in the main unit 1, the rear axis circuit 32 is operated, the low frequency amplification circuit 35 is put into a rest state, and thereby the receiving state is entered, and the process moves from step n37 to step n9.

As another embodiment related to the slave unit stop switch 24, in step n55, the step number f n is set for the base unit 1.
55 or to step n32 for the handset 2 is not only performed as described above, but also in step n32.
55 to step n56 and step n30, respectively, so that the loads 22, 122 provided in connection with the base unit 1 and slave unit 2 are simultaneously monitored for power at the set time. You can also do this.

FIG. 4 is a flowchart for explaining the operation of the handset 2. In the handset 2, as shown in FIG. 4, the reference numerals having the same last two digits among the three digits with 1 in the 100th place are used for components corresponding to the base unit 1. The process moves from step m1 to step m2, and initial settings are performed. In step m3, the house code is set by the house code setting circuit 119. In step m4, the demodulation circuit 32 and the low frequency reduction/increase hi circuit 134 are operated, and the low frequency amplifier circuit 1
35 and enters the receiving state. In step m5, if the calling signal from base unit 1 is hot, step m6
Then, it is determined whether the talk switch 112 is being operated. When the talk switch 112 is operated, the process moves to step m7, and the low frequency amplification circuits 134, 13
The modulation circuit 136 is brought into operation while the modulation circuit 136 remains in the rest state.

This prepares the handset 2 to send the base code to the base unit 1. In step m8, the house code is read in the processing bag [130], and the memo 'J 130
Decipher the contents of a and create a calling code. Therefore, in step m9, the ringing signal is sent to the processing device 130.
Send from. In step mlO, the frequency modulation circuit 3
6, the carrier frequency is set by the channel selector 13.
It is modulated with the oscillation frequency of the high frequency oscillation circuit 33 determined by.

In step mll, the high frequency signal from the handset 2 is sent from the coupling circuit 131 to the open power line 3, and in step m12
The signal is continued for a predetermined signal transmission time. Thereafter, in step m13, it is determined whether the talk switch 112 has been cut off, and if it has been cut off, the process moves to step m14, where the reproduction 11 circuit 132 and the low frequency amplification circuit 134 are operated, and the output from the low frequency amplification circuit 134 is An audio signal is applied from the transmission/reception changeover switch 112 to the speaker/microphone 111 to enter a receiving state.

If it is determined in step m15 that there is a response from the base unit 1, the process moves to step m16, and the high frequency signal from the base unit 1 is fed from the coupling circuit 131 to the demodulation circuit 132 and demodulated, and the audio output is output in step m18. can get. When the call on the main unit 1 ends in step m19, it is determined in step m20 whether the talk switch 112 has been operated or not. If the talk switch 112 has not been operated, the process moves to step m21, and a predetermined call end time, for example 1, is determined.
After 0 seconds, the process returns to step m5.

If there is no response in step m15, step m
22, when the call end time has elapsed, for example, 10 seconds, after the high-1 direct wave signal from base unit 1 disappears, step m.
Return to 5.

When the high frequency signal from base unit 1 is received in step m5, it is applied from the coupling circuit 131 in step m28 to the demodulation circuit 132 in step m29 and is demodulated. In step m31, the code signal is decoded, and in step m32, when the /% rousoud operated from the base unit 1 matches the house code set in the house code setting circuit 119, discharge for intercom operation is performed in step m33. It is determined whether or not. When the intercom is to be operated, the process moves to step m34, where the processing device 130 creates a ring tone based on the contents stored from the memory 130a. In step m35, the ringing tone signal is applied to the speaker/microphone 111 from the low frequency amplification circuit 134 via the transmission/reception changeover switch 125, and is converted into sound. This ringing tone lasts for a ringing time period determined in the processing device 130. Thereafter, in step m37, it is determined whether the talk switch 112 has been operated. When the talk switch 112 is operated, the process moves to step m23 and the high frequency amplification circuit 35 and modulation circuit 3
6 is activated, and the handset 2 enters the transmitting state. The audio signal from the speaker/microphone 111 is frequency-varied by -1 in the variable w1'1 circuit 136 in step m25, amplified by the power amplifier circuit 137 in step m26, and sent from the coupling circuit 131 to the commercial power line 3.

In step m27, it is determined whether or not the talk switch 112 is cut off, and if it is cut off, step m14
Move to.

If the signal received by the handset 2 in step m33 is not a call for intercom operation, the process moves to step m38, and the processing device 130 determines whether the signal should control the output function 128 or not. When the output outlet 128 is not to be controlled, step m39
Then, in step m39, make a note of the notification sound to achieve the wake-up mode! The notification sound is generated based on the stored contents of J130a, and a notification sound is generated by the functions of the low frequency amplification circuit 134, the transmission/reception changeover switch 125, and the speaker/microphone 111 in step m40. after that,
In step m41, it is determined whether the stop switch 123 provided on the handset 2 has been operated or not. If it has not been operated, the processing device 130 generates a notification sound for a predetermined ringing time, and then in step m43 At this time, the low frequency amplification circuit 34 and the transmission/reception changeover switch 125 are deactivated to stop generating the notification sound. When the stop switch 123 is operated in step m41, the process also moves to step m43.

If it is determined in step m38 that the operation of the output outlet 128 should be controlled, the process moves to step m44 to achieve a load control mode for controlling the load 122, and the output signal sent from the base unit 1 is Output outlet 1
It is determined whether power should be supplied to 20. When power is to be supplied to the output outlet) 120, step m45
Then, power is supplied to the load 122 from the first output outlet 120. At this time, a notification sound is created by the function of the memory 130a in step m46, and a notification sound is generated from the speaker/microphone 111 by the function of the low frequency amplification circuit 134 and the transmission/reception changeover switch 125 in step m47. When the stop switch 123 is not operated in step m48, the notification sound is emitted for a predetermined ringing time in the processing device 130,
In step m50, the processing device 130 stops the low frequency amplification circuit 134 and the transmission/reception changeover switch 125, thereby stopping the generation of the notification sound.

When the stop switch 123 is operated in step m48, the process also moves to step m50 and the generation of the notification sound is stopped.

In step m51, it is determined whether the stop switch 123 has been operated. If the stop switch 123 has been operated, the process moves to step m52, where the supply of relaxation to the output sensor 120 is stopped, and the process moves to step m5. If the stop switch 123 is not operated, the process also moves to step m5. In step m44, if the output outlet signal is not to be supplied to the load 122, the process moves to step m52.

In the embodiment described above, the output outlet 20, 120 is controlled to supply only 1 power to the load 22, 122 at the set time by the activation of the interlocking on switch 16c, but other embodiments of the present invention As an example), another switch is provided, and the operation of this switch indicates step m6.
6, and the supply of power to the output outlet 2 may be cut off in step m68. Further, such cutting off of the power supply to the output outlet 20 can be similarly performed in step m45 in relation to the output outlet 120 of the slave device 2.

According to the present invention, a notification sound can be generated from the handset at the time set by the clock means in the base unit of the intercom, which is capable of making telephone calls using the power line carrier method, so that the alarm sound can be generated from the slave unit. It can be widely implemented for and other operations, making it convenient in real life.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a block diagram showing the specific configuration of the base unit 1 and slave unit 2 shown in FIG. 1, and FIG. 3 is a block diagram of the base unit 1. FIG. 4 is a flowchart for explaining the operation of the handset 2. FIG. 1...Main unit, 2...Slave unit, 3...Commercial power line, l
O... Display, 11, 111... Speaker/microphone, 12° 112... Talk switch, 13, 113
−゛Channel selector, 14... Time setting circuit, 19
, 119... House code setting circuit, 25, 125...
...Transmission/reception selector switch, 31,131...Coupling circuit, 32゜132...Demodulation circuit, 33,133...High frequency oscillation circuit, 34,35,134,135...Low frequency amplification circuit, 36 , 136... modulation circuit, 37, 13
7... Power amplifier circuit agent Patent attorney Kei Nishi

Claims (1)

[Claims] In an interphone that allows a base unit and a slave unit to communicate over a power line, the base unit includes a clock means that performs a clock operation and generates a notification signal at a predetermined time; The intercom is characterized in that the notification signal is sent to the handset via a power line, and the handset generates a notification sound in response to the notification signal.