JPS58162162A - Interphone provided with clock - Google Patents

Abstract

PURPOSE:To prevent quiet sleep during the night or the like, by reducing the volume of a chime tone by an output from a clock circuit during a previously set up time band. CONSTITUTION:The clock circuit 8 is set up so that outputs are generated from an output terminal 8a during a required time band, e.g. 7 p.m. through 7 a.m. Consequently, outputs are generated from a flip flop circuit in the clock circuit 8 during said time band, so that a switching circuit 17 is turned on and a switching circuit 18 is held off by the output of a gate circuit 21. Therefore, a chime signal from a terminal 7a is passed through a resistor 20 and the sound volume of the chime is reduced during the night.

Description

[Detailed description of the invention] The present invention relates to an interphone with a clock.

Recently, intercoms have become commonplace in households, but if a visitor arrives at night and the chime rings, families with young children may wake up their children who have fallen asleep.

If you live in a small residential area, and the chime rings at night when the surrounding area is quiet, it may disturb your neighbors.

Therefore, the present invention provides an intercom with a clock that reduces the volume of the chime sound during a preset time period by using the output of a clock circuit.

An embodiment of the present invention will be described below based on the drawings. 1st
In the figure, digit 1 is a friendly intercom, and numeral 2 is a slave device. Goodwill 1 is equipped with a handset and IS/Radio No. 4 clock 5. The speaker 4a of the radio 4 is used to generate radio broadcasts, intercom chime sounds, and clock naram sounds.

Further, the clock 5 is equipped with a time switch circuit to which an outlet 5aK and other electrical devices are connected and turned on or off at a desired time.

FIG. 2 shows the circuit configuration of Goodwill 1, where 6 is an intercom circuit and 7 is a chime circuit, which are available in two types: an intercom chime sound and a clock alarm chime sound. 8 is a clock circuit, 9 is a time switch circuit, 10 is a radio circuit, 11 is a control circuit to be described later, 12
is an augmentation circuit. Reference numeral 15 is a manual selector switch for selecting whether to set the chime or the radio to sound as a clock alarm.

FIG. 6 shows an example of the control circuit 11, in which 14 is a frill-luff 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.

FIG. 4 shows a part of the clock circuit 8, 22 is a counter,
The time is set in advance to match the time displayed on the clock 5 by a manual switch (not shown), and the current time is measured by receiving clock pulses from the terminal 22a. Reference numerals 25 and 74 are setting circuits for setting the start and end times of a desired time period, 25 and 26 are coincidence circuits, and 27 is a frill-luff flop circuit.

Next, the operation will be explained. There is a visitor with the radio currently playing, and switch 2b of intercom slave unit 2 is turned on.
When is pressed, a chime signal is generated from the chime circuit 7. This chime signal is level-converted to the terminal 7aK shown in FIG. It is now assumed that the terminal 8a is held at '0/' and the gate circuit 21 is open. Therefore, the switching circuits 18 and 19 are turned on and off, respectively, and the output from the radio circuit 10 is 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 3 and answer the call. This conversation is also not interrupted by the radio broadcast VC. When the answering is completed and the handset 6 is returned, the hook signal is supplied to the terminal 6a in FIG. 6, and the 79217021 circuit 14 is re-nutted. This returns the speaker 4a to its original state.
The radio broadcast will be played again.

Note that in the above example, radio broadcasting is cut off while the intercom is in use, but the volume is not limited to this, and the volume may be lowered.

Next, the functions of the clock 5 will be explained. From the output terminal 8a of the clock circuit 8 in FIG.
to 7 a.m. to produce output. That is, by setting 7:00 p.m. and 7:00 a.m. in the setting circuits 25 and 24 of FIG.
An output is generated from the circuit 27 during the above-mentioned one time period. This output turns on the switch circuit 17 shown in FIG. 3, and the output of the gate circuit 21 turns on the switching circuit 1.
8 is held off. Therefore, the chime signal from the terminal 7a passes through the resistor 20, and the volume of the chime sound at night becomes low.

Further, an alarm output is generated from the terminal 8b of the clock circuit 8 at a preset time. This alarm output causes a chime sound or a radio to sound, and the selection is made by turning the switch 15 to L.

Further, the time switch circuit 9 supplies or cuts off power to the outlet (5a) at a set time based on the output from the clock circuit 8, and turns on or off external electrical equipment.

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

5- As described above, according to the present invention, the sound of the chime (2) is automatically dimmed at night, etc., so that the sound sleep of infants, etc. is not disturbed, and the sound of the chime (2) is not disturbed, and the neighbor's house etc. are not disturbed.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a block diagram showing -911 of the circuit configuration, and FIG. 3 is an electric circuit diagram showing a part of FIG. 2 in detail. FIG. 4 is a block diagram showing the main parts of FIG. 2 in detail. 1... Intercom parent 2... Intercom slave 8
...Clock circuit 22...Counter 23.24
...Setting circuit 25.26...Concordance circuit 27...Fri-ruff flop circuit and above Applicant Seikosha Co., Ltd. Agent Patent Attorney Mogami 6- Fig. 1 Fig. 2 G Fig. 3 4 figure 324

Claims (1)

[Claims] This intercom with a clock is equipped with a clock circuit that produces an output during a preset time period, and a circuit that lowers the chime sound of the intercom by modifying the output of the clock circuit.