| 摘要 |
PURPOSE:To surely generate an alarm at a set time by forming automatically a state that the alarm can be sounded simultaneously with correction of a time at which the alarm is set. CONSTITUTION:By one operation of a function selecting switch 4a in an ordinary state, a function selecting circuit 15a selects an alarm function, while a signal S2 of an alarm counter 13a is selected in a display switching circuit 20a. When a stem is pulled to a position 5a in this state of selection and a safety switch 5a' is operated, a signal S6 from FF18d is inversed alternately at every operation of a sound control switch 60 and thereby the sounding and the prohibition of sounding of the alarm are controlled. When a time-counting counter 12 coincides with a counter 13a, a sound generating unit 25 is driven by a signal S3 of a detection circuit 13b. Next, the sounding of the alarm is prohibited by the operation of a switch 60, and simultaneously, based on a signal S5, a decoder and a driver 20b operate so that a display in a digital display unit 2 is turned forcedly to be OFFAL signifying the prohibition of the sounding of the alarm. |
