PURPOSE: To provide a noozing mechanism, which is made of a simple electronic circuit, by stopping the output of sound signals while taking AND between the signals from a rough switch and the output signals of an RS flip-flop which is operated by such a time constant circuit as is charged by a snoozing swtich.

CONSTITUTION: When a roughly set time is reached to turn on a rough switch 3, output pluses 1 are fed from a signal pulse generating circuit 10 to an RS flip-flop 6 so that it may be set to generate an output 2. As a result, an AND gate 9 is opened to drive a speaker 8 so that an alarm sound is generated. If, in this instance, a noozing switch 4 is turned on for a short time, the output 2 is varied with the variation in the output voltage of a CR time constant circuit 5 to stop the drive of the speaker 8. When the snoozing period is ended, the speaker 8 is driven again by the signals f1