JPH0785567B2 - intercom - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an intercom that enables easy communication between the inside and outside of a bathroom and enables listening to broadcasting such as radio.

[Prior Art] As an intercom with a radio in which a radio is incorporated into an intercom, there is a device disclosed in Japanese Utility Model Laid-Open No. 62-3152.

In this device, when the call switch is turned on to make a call while listening to the radio, the radio signal from the tuner is cut off and the voice signal for the call is switched to the call content. Through the speaker,
The radio sound is kept out of the speaker.

[Problems to be Solved by the Invention] However, even if a telephone call is necessary, if the radio sound is completely inaudible in this way, the person listening to the radio may find that the sound is interrupted. There is a problem that you feel uncomfortable and you can not listen to the broadcast in a fun way.

An object of the present invention is to provide an intercom that can make a necessary call without interrupting listening of a broadcast when making a call between the inside and outside of a bathroom while listening to a broadcast such as a radio.

[Means for Solving the Problems] The present invention connects a telephone set installed outside the bathroom and a bath side telephone installed inside the bathroom, and at the same time, outputs a voice signal, an operation signal, and a broadcast signal. A signal transmission line that transmits to the other side communication device and a microphone that is provided in each communication device and that converts voice into an electric signal.When activated, the electric signal of the microphone is amplified and converted into an audio signal in the intercom circuit of the other communication device. Intercom circuit that sends the audio signal transmitted from the intercom circuit of the other side communication device to the low frequency amplifier side, and the broadcast signal transmitted from the other side communication device side or the broadcast signal sent from the tuner is low when not operating. A muting circuit that sends the signal to the frequency amplifier side without attenuation, and attenuates the signal when operating, a low-frequency amplifier that amplifies broadcast and audio signals,
A speaker that reproduces sound according to each amplified signal, a normally-open call switch that sends an operation signal when pressing, and one of the communication devices are provided with the desired broadcast wave. The technical means includes a tuner for converting to a broadcast signal and a timer circuit for instructing the muting circuit and the intercom circuit to be in an operating state for a certain time when an operation signal is input.

The present invention further prevents the muting circuit and the intercom circuit from returning to an inoperative state when an operation signal is sent by pressing one of the call switches again after a certain time has elapsed after the call switch was pressed. Technical means.

[Operation] (Claim 1) A tuner receives a desired broadcast radio wave and converts it into a broadcast signal, and the broadcast signal is transmitted to the muting circuit directly or via a signal transmission line.

When the call switch is not pressed, the muting circuit does not operate and the broadcast signal is sent to the low frequency amplifier side without any attenuation.

The low frequency amplifier amplifies the broadcast signal and sends it to the speaker,
Broadcast flows from the speaker.

When one of the call switches is pressed, an operation signal is transmitted, and the operation signal is transmitted to the timer circuit directly or via a signal transmission line.

The timer circuit instructs the muting circuit and the intercom circuit to be activated for a certain period of time.

The intercom circuit is activated for a certain period of time, amplifies the electric signal of the microphone and transmits it as an audio signal to the intercom circuit of the other side communication device, and at the same time transmits the audio signal transmitted from the intercom circuit of the other communication device. Send to the low frequency amplifier side.

The muting circuit is activated for a certain period of time, attenuates the broadcast signal transmitted from the other side talker side or the broadcast signal sent from the tuner, and sends it to the low frequency amplifier side.

The low-frequency amplifier amplifies the attenuated broadcast signal and audio signal and sends the amplified signal to the speaker. The broadcast flows at a low level from the speaker for a certain period of time, and a call can be made between both callers.

(Claim 2) When any one of the call switches is pressed again before a certain period of time, an operation signal is sent, the muting circuit and the intercom circuit are immediately returned to the operation stop state, the call state is canceled and the volume of the broadcast is restored. Return.

[Advantages of the Invention] (Claim 1) When listening to a broadcast such as a radio with either of the communication devices,
When one of the call switches is pressed, a low level broadcast is sent from the speaker for a certain period of time, and a call can be made between both callers, which has the following advantages.

It is possible to grasp the broadcast contents while talking, and dissatisfaction is unlikely to occur.

By pressing the call switch, you can start a call from either side of the phone.

Since you can call hands-free, you can call even while washing your hair.

When the call ends within a certain time, the broadcast flows at a low level, so dissatisfaction is unlikely to occur.

After a certain period of time, the level of the broadcast sound is automatically returned to the original level, which saves time and effort.

(Claim 2) If the call switch is pressed again, the level of the broadcast sound returns to the original level without waiting for a certain period of time, which is convenient.

When the call switch is pressed again, the call state is released without waiting for a certain period of time, so that mutual privacy can be protected.

EXAMPLES Next, the present invention will be described based on examples.

The gas hot water supply system 1 shown in FIG. 1 is a combined hot water supply system that can easily perform automatic hot water filling and reheating, etc. in addition to general hot water supply. The water heater main body 2 performs hot water supply and hot water filling. And a bath heater that circulates hot water in a bath to reheat the bath. These heaters are controlled by a controller 3 provided in the water heater body 2.

The control device 3 is provided with a main remote controller 10 and a bath remote controller 20 for instructing the start and stop of the operation of the water heater main body 2 and setting the operating state, and each remote controller is, for example, a kitchen remote controller. It is installed in the bathroom.

Each remote controller is provided with an intercom function capable of communicating with each other, and each remote controller sends a control signal to a control device 3 that controls the water heater main body 2.
10a, 20a and call circuits 10b, 20b as intercoms are provided, and each remote control circuit and each call circuit operate independently of each other.

The remote control circuits 10a, 20a are mainly composed of a microcomputer operated by electric power supplied from the control device 3, a switch for giving an instruction, a display device for displaying instruction contents such as a set temperature and an operating state, and the like. It consists of a buzzer, etc. to notify you of boiling.

On the other hand, the call circuits 10b and 20b are used for making a call between the main remote controller 10 and the bath remote controller 20, and the main remote controller 10 is provided so that radio broadcasting can be easily enjoyed even in the bathroom. A tuner 11 for receiving a broadcast is provided side by side with the call circuit 10b on the side, and these will be described below.

In the main remote controller 10, the tuner 11, the low frequency amplifier 12, the speaker 13, the microphone 1 are used as the communication circuit 10b.
4, a call switch 15, an intercom circuit 16, a muting circuit 17, a synthesizing circuit 18, and a timer circuit 19 are provided, and in the bath remote controller 20, as the call circuit 20b,
A low frequency amplifier 22, a speaker 23, a microphone 24, a call switch 25, an intercom circuit 26, a muting circuit 27 and a synthesis circuit 28 are provided.

The tuner 11 is a part that receives general medium-wave broadcasting, FM broadcasting, or short-wave broadcasting, extracts the low-frequency signal from the received signal,
A desired broadcasting station can be freely selected by a tuning switch (not shown) provided on each remote controller.

Note that the tuner 11 is provided with a selection circuit 11a, and the selection circuit 11a corresponds to the radio switches 11A and 11B provided for each remote controller also as the power switch of the tuner 11, and only the operated remote controller is provided. Transmit the broadcast signal to.

Each intercom circuit 16, 26 amplifies a minute audio signal of the microphone 14, 24 according to an operation signal from the call switches 15, 25, and transmits the amplified audio signal to the intercom circuit provided in the other remote controller. To do.

Each of the intercom circuits 16 and 26 processes the signal so that no signal is generated via both microphones 14 and 24 when there is an audio signal of the other intercom circuit.

The muting circuits 17 and 27 are signal attenuating circuits made up of a plurality of resistors for reducing the signal level of the broadcast signal of the tuner 11, and when the timer circuit 19 described later operates, the analog switch is switched to attenuate the signal. Let
When the timer circuit 19 does not operate, the broadcast signal of the tuner 11 is transmitted as it is to each synthesis circuit.

The synthesis circuits 18 and 28 synthesize the broadcast signal of the tuner 11 transmitted via the muting circuits 17 and 27 and the audio signal from the intercom circuit provided in the other remote controller to synthesize the low frequency amplifiers 12 and 22. To transmit.

The output voltage of each low-frequency amplifier 12, 22 is the speaker 13, 23.
The sound corresponding to the amplified signal is reproduced.

The timer circuit 19, when the tuner 11 is operating,
When there is an operation signal from the call switches 15 and 25,
After that, it operates for a fixed time Ta (for example, 60 to 90 seconds), and each intercom circuit 16, 26 and each muting circuit 17,
When 27 is operated and Ta has passed for a certain time, a signal for stopping the operation of each intercom circuit 16, 26 and each muting circuit 17, 27 is sent.

Even if Ta does not elapse for a certain period of time, by operating the call switches 15 and 25 again, each intercom circuit
A signal for stopping the operation of 16, 26 and the muting circuits 17, 27 is transmitted.

When the tuner 11 is not operating and the call switches 15 and 25 are operated, the intercom circuits 16 and 26 are turned on or off according to the operation, and when they are turned on, the timer is activated. The circuit 19 automatically turns off after a certain time Ta.

The gas hot water supply system 1 of the present embodiment having the above-mentioned configuration,
The control device 3 controls the water heater main body 2 in response to a control signal from the remote control circuit of each remote controller, and a switch directs hot water filling, or when a hot water tap (not shown) is opened, the burner is ignited and hot water or hot water is supplied. Is done.

On the other hand, the call circuits 10b and 20b operate regardless of the hot water supply operation of the remote control circuits 10a and 20a.

The operation of the communication circuits 10b and 20bb will be described below with reference to FIG.

When any of the radio switches is turned on at time t1, the tuner 11 is turned on, the selection circuit 11a is activated, and the broadcast signal is transmitted only to the selected remote controller.

At time t2 when you are enjoying radio broadcasting with one remote control,
When the call switch is operated on the other remote controller, the timer circuit 19 is activated and the intercom circuits 16, 26
Is operated for a certain period of time and each muting circuit 17, 27 is operated for a certain period of time to lower the level of the broadcast signal of the tuner 11 and transmit it to the synthesis circuit.

In the remote controller on the side enjoying radio broadcasting, the broadcast signal of the tuner 11 whose level has dropped and the audio signal transmitted from the other intercom circuit are combined,
The voice of the call sounds loud, and the sound of the radio broadcast sounds low.

Therefore, it is possible to make necessary calls between remote controllers and to hear the contents of radio broadcasts to the extent that a general outline can be heard. Dissatisfaction is less likely to occur as compared to the case of hearing loss.

When the timer circuit 19 finishes operating at time t3, the muting circuits 17 and 27 restore the level of the broadcast signal of the tuner 11 to the original level, and can enjoy the radio broadcast at the normal volume again.

As described above, according to the present invention, when one of the remote controllers is enjoying radio broadcasting, if one of the call switches 15 and 25 is pressed, a necessary call is made between the remote controllers for a certain period of time. It can be performed hands-free, and it is possible to listen to radio broadcasts continuously without interruption, and no discomfort occurs.

[Brief description of drawings]

FIG. 1 is a block diagram of a gas hot water supply system showing an embodiment of the present invention, and FIG. 2 is a time chart for explaining the operation of a communication circuit of this embodiment. 1 in the figure ... Gas hot water supply system (intercom), 10 ...
... Main remote control (phone), 11 ... Tuner, 12 ...
… Low frequency amplifier, 13 …… Speaker, 14 …… Microphone, 15
…… Call switch, 16 …… Intercom circuit, 17 ……
Muting circuit, 19 …… Timer circuit, 20 …… Bath remote control (bathside communication device), 22 …… Low frequency amplifier, 23 ……
Speaker, 24 …… Microphone, 25 …… Call switch, 26
…… Intercom circuit, 27 …… Muting circuit

Claims (2)

[Claims] 1. A signal for transmitting a voice signal, an operation signal, and a broadcast signal to the other side communication device while connecting the communication device installed outside the bathroom and the bath side communication device installed inside the bathroom. A transmission line and a microphone provided in each telephone to convert voice into an electrical signal. When activated, the electrical signal from the microphone is amplified and transmitted to the intercom circuit of the other telephone as an audio signal and transmitted to the other telephone. The intercom circuit that sends the audio signal transmitted from the intercom circuit to the low frequency amplifier side, the broadcast signal that is transmitted from the other side talker side or the broadcast signal sent from the tuner is sent to the low frequency amplifier side without attenuation. , A muting circuit that attenuates and sends it when operating, a low-frequency amplifier that amplifies broadcast and audio signals, a speaker that reproduces sound according to each amplified signal, and pressing operation A normally open call switch that sometimes sends an operation signal, a tuner that is provided on either side of the telephone and that receives the desired broadcast wave and converts it into a broadcast signal, and the muting circuit and the muting circuit when the operation signal is input. An intercom including a timer circuit that instructs the intercom circuit to be in an operating state for a certain period of time. 2. The muting circuit and the intercom circuit return to an inoperative state when an operation signal is sent by pressing one of the call switches again after a certain time has elapsed after the call switch was pressed. Intercom according to 1.