JPS58164365A - Interphone with radio - Google Patents

Abstract

PURPOSE:To deal with a visitor without the disturbance of the radio which is turned on when the visitor comes, by reducing or muting the sound volume of the radio of a radio-attached interphone while the interphone is used. CONSTITUTION:When a visitor comes while the radio is turned on and a chime signal is generated by a chime circuit 7, its signal is supplied to a terminal 7a to set a flip-flop 14. If a terminal 8a is held at a level ''0'' and a gate circuit 21 is opened, switching circuits 18 and 19 turn on and off respectively to intercept the output of a radio circuit 10, generating a chime tone from a speaker 4a. Therefore, the chime tone and a conversation are not disturbed by a radio broadcast. When a handset is returned after the conversation, the flip-flop 14 is reset and the radio broad-cast is heard again from the speaker 4a.

Description

[Detailed description of the invention] The present invention relates to an intercom with a radio.

These days, many housewives listen to the radio while doing housework, so even if the intercom rings while the radio is playing, it may not be possible to hear it.

Also, when the radio is on, you can't hear what's being said over the intercom, so every time the intercom rings, you have to turn down or turn off the radio, which is very busy and annoying. provides an intercom with a radio that lowers or cuts off the cyanide in the radio.

An embodiment of the present invention will be described below based on the drawings. M1
In the figure, 1 is a sharp device of the intercom, and 2 is a slave device. The sharp instrument 1 is equipped with a handset 6, 2, a fourth dial, and a clock 5. The speaker 4a of the radio 4 is used to generate radio broadcasts, intercom chime sounds, and clock alarm sounds.

The clock 5 is also equipped with a time switch circuit, which connects the outlet 5a and other electrical equipment and turns it on or off at a desired time.

2nd rf! J shows the circuit configuration of the sharp tool 1, 6 is an intercom circuit, and 7 is a chime circuit. Two types of chime sounds are available: an intercom chime sound and a chime sound as an alarm sound for a clock. 8 is the clock circuit,? An Fi time switch circuit, a 10Fi radio circuit 11 is a control circuit to be described later, and 12 is an amplifier circuit. Reference numeral 15 is a manual selector switch for selecting whether to sound a chime or a radio as an alarm. .

The TAS diagram shows an example of the control circuit 11, in which 14 is a flip-flop circuit, 15 is a level conversion circuit, 16 is a chattering removal circuit, 17 to 19 are switching circuits, 20 is a resistor, and 21 is a gate circuit.

Next, the operation will be explained. When a visitor presses the switch 2b of the intercom +-2 while the radio is currently playing, a chime signal is generated from the chime circuit 7. This chime signal is supplied to the terminal 7a in FIG. Jl circuit 4 is fired. Assume that the terminals 8a and 10" are now held, and the gate circuit 21 is open. Therefore, the switching circuits 18 and 19 are turned off, respectively.
The output from the radio circuit 10 is quickly cut off and a chime sound is generated from the speaker 4a. Therefore, the chime sound is not drowned out by the radio broadcast, and the user can immediately pick up the handset sVr and answer the call. This conversation is also made into a radio broadcast so that there will be no interruptions. When the call is over and the handset 5 is returned, the hook No.
The terminal 3aK shown in the figure is supplied, and the 7-lip Flora 1 circuit 14 is reset. After fixing this, it returns to its original state and speaker 4
The radio broadcast comes on again.

Note that in the above example, the radio broadcast was cut off while the intercom was in use, but the operation is not limited to this, and it may also be possible to lower the volume.

Next, the functions of the clock 5 will be explained. The output terminal 8a of the clock circuit 8 shown in FIG. 2 is set to generate an output at night, for example from 7:00 pm to 7:00 am. In response to this output, the switching circuit 17 shown in FIG. Therefore, the chime signal from the terminal 7a passes through the resistor 20, and the volume of the chime sound at night becomes low.

An alarm output is generated from the terminal 8b of the clock circuit 8 at a preset time. This alarm output can be modified to make a chime sound or a radio sound, and the selection is made by the switch 13'.

Further, the output from the clock circuit 8 of the time switch circuit 9 is modified to supply or cut off the power to the outlet 5aK at the set time, thereby turning on or turning off external electrical equipment.

Generally, the intercom 1 is often installed in the kitchen, so by providing it with the above-mentioned time switch function, it is possible to control the time of electrical equipment used in the kitchen.

As described above, according to the present invention, a radio is added to the intercom, and the volume of the radio is lowered or cut off while the intercom is in use. I can respond to this without getting in the way.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention, Figure 2 is a boot 2 diagram showing an example of the circuit configuration, and Figure 3 is a
This is an electrical circuit diagram showing the main parts in detail. 1...Interphone main unit, 2-interphone +-, 4
...2 Geo, 11...Control circuit.

Claims (1)

[Claims] An intercom with a radio equipped with a control circuit that reduces or cuts off the radio sound 1 while the intercom is in use.