JPH034870B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an alarm clock.

[Prior Art] A conventional analog alarm clock has an alarm switch that operates every 12 hours.

[Problems to be Solved by the Invention] Since the alarm switch operates every 12 hours, for example, if you want the alarm to sound at 7 a.m., it is necessary to set the alarm for after 7 p.m. As a result, people often forgot to set the alarm and the alarm did not go off the next morning.

Furthermore, in general, an alarm tone often sounds at a fixed time every day on weekdays, and the alarm has to be set every night, which is cumbersome.

SUMMARY OF THE INVENTION An object of the present invention is to provide an alarm clock that can sound an alarm every 24 hours without having to set an alarm simply by adding a simple configuration.

[Means for solving the problem] The present invention generates one output from an output generation circuit by operating a manual switch while an alarm sound is being generated, and operates every 12 hours by this one output. A prohibition circuit is provided which prohibits the generation of an alarm sound by the above-mentioned one output by the operation of the alarm switch every other time, and the prohibition operation of the above-mentioned alarm sound is provided by the operation of the manual switch while the alarm sound is not being generated. This is to disable it.

[Example] In the drawing, 1 is an alarm switch that operates every 12 hours, 2 is an alarm set switch, and 3 is an alarm switch that operates every 12 hours.
is a manual switch to generate an alarm sound every 24 hours. 4 is a 13-23 hour timer, 6
Reference numeral 7 indicates an alarm setting confirmation sound generation circuit, 7 indicates an alarm generation circuit, and 8 indicates a well-known hand movement control circuit, which causes the second hand to move for 2 seconds when a 24-hour alarm is set. 9 to 15 are flip-flop circuits that operate according to the falling edge of the clock; 16;
is a one-shot circuit, 17 to 21 are gate circuits,
22 to 24 are inverters.

Next, the operation will be explained. The set switch 2 is now closed, the output Q of the flip-flop circuit 14 and the output of the flip-flop circuit 9 are held at "1", and the output Q of the flip-flop circuit 15 is held at "0".
It is assumed that an alarm is set every 24 hours.

When the desired time comes and the alarm switch 1 is closed, the D input of the flip-flop circuit 9 becomes "1" due to the output from the gate circuit 17.
A 16Hz clock pulse from terminal a causes its output to fall to "0". Therefore, one narrow pulse is generated from the gate circuit 18, and the timer 5 and flip-flop circuits 12 and 13 are reset.

On the other hand, due to the fall of the output of the flip-flop circuit 9, the output Q of the flip-flop circuit 10 is inverted to "1", and the alarm generating circuit 7 is activated to generate an alarm sound.

When the switch 3 is closed, one pulse is generated from the one-shot circuit 16, and the fall of the pulse triggers the flip-flop circuit 11, and its output Q resets the flip-flop circuit 10. Thus, the alarm sound stops sounding, and the output Q of the flip-flop circuit 15 remains at "0", meaning that a 24-hour alarm has been set. That is, when the output Q of the flip-flop circuit 15 is "0", the output of the gate circuit 21 is held at "0", the output Q of the flip-flop circuit 14 is held at "0", and the gate circuit 17 is closed. be. Therefore, even if the alarm switch 1 is closed after 12 hours, the output of the gate circuit 17 remains at "0" and no alarm sound is generated.

After that, i.e. from the occurrence of the above alarm sound
After 13 to 23 hours have passed, output ₁ of timer 5 becomes “0”
When the flip-flop circuit 12 is inverted, the output Q of the flip-flop circuit 12 becomes "1", and the output Q of the flip-flop circuit 14 becomes "1". Therefore, when the alarm switch 1 is operated next, the same operation as described above is performed and an alarm sound is generated.

By closing the switch 3 while the alarm sound is being generated in this way, the alarm sound will sound every 24 hours even without setting the alarm.

Note that while the 24-hour alarm is set in this manner, the hand movement control circuit 8 is operated by the output of the flip-flop circuit 15, and the second hand is set to 2.
The second hand moves and the user is notified of this.

By the way, in order to cancel the 24-hour alarm and make it similar to a normal alarm clock, the switch 3 is closed while the alarm is not occurring. As a result, the pulse from the one-shot circuit 16 passes through the gate circuit 20, and the flip-flop circuit 1
5 and inverts its output Q to "1".
Therefore, the output Q of the flip-flop circuit 14 is held at "1" and the gate circuit 17 is opened, and like a normal alarm clock, if switch 2 is closed, an alarm sound will be generated every time alarm switch 1 is closed. become. In this case, the hand movement control circuit 8 does not operate, and the second hand moves by one second.

Further, in conjunction with the inversion of the output Q of the flip-flop circuit 15, that is, in conjunction with the switching operation between the 24-hour alarm and the normal alarm, a specific confirmation sound is generated from the alarm set confirmation sound generation circuit 6.
You will be notified that the switching has taken place.

Further, when the set switch 2 is closed to set the alarm, the alarm set confirmation sound generating circuit 6 is operated, and a confirmation sound different from the above is generated to notify that the alarm has been set.

[Effect of the invention] According to the invention, one manual switch is added,
By operating this switch while the alarm sound is occurring, you can stop the alarm sound and set an alarm every 24 hours.
You can set the alarm for the next morning just by turning off the alarm. Therefore, it is possible to avoid forgetting to set an alarm, and to prevent being late.

Moreover, the 24-hour alarm can be canceled by operating the manual switch while no alarm sound is being generated, so it can also be used as a normal alarm clock.

[Brief explanation of drawings]

The drawing is a logic circuit diagram showing an embodiment of the present invention. 1...Alarm switch, 3...Manual switch, 5
...Timer, 7...Alarm control circuit, 9-15...Flip-flop circuit, 20, 21...Gate circuit.

Claims (1)

[Claims] 1 An alarm switch that operates every 12 hours,
An alarm circuit generates an alarm sound by operating the alarm switch, and an output is generated by operating the manual switch while the alarm sound is being generated, and by operating the manual switch when the alarm sound is not being generated. an output generation circuit that generates another output; a control circuit that stops the alarm sound by operating the switch while the alarm sound is being generated; An alarm clock comprising an inhibition circuit that inhibits generation of an alarm sound during operation of the alarm clock, and an inhibition canceling circuit that disables the inhibition operation of the alarm sound by the inhibition circuit by the other output from the output generation circuit.