| 摘要 |
PURPOSE:To improve safety characteristics when an electrical cooking device is used and to make a small-sized power supply for a control circuit by a method wherein a driving signal for an informing sound generating member is outputted from a control member during a silent signal period and a sound is generated by a sound generating member subsequent to a time when the operation of a sound amplifying circuit is stabilized. CONSTITUTION:In the event that a sound informing operation is to be carried out, a signal is inputted to a base terminal of a transistor 9 in response to an output from a control output port 4, the transistor 9 is set ON, a power supply 5 is supplied to a sound amplifying circuit 8. Since an unstable operation is carried out from a time (a) to a time (b), a silent state is instructed and at the same time this is controlled by a control member 1 in such a way as a sound informing signal is generated subsequent to the time (b) in which the operation of the sound amplifying circuit 8 is stabilized so as to generate sound through a sound generating member 10. In turn, in concurrent with the time in which a signal output from a control output port 4 is transmitted, a driving signal of an informing sound generating member 2 is also outputted from a buzzer output port 3 and a buzzer sound of 'pi-pi' is produced during a time from a time (a) to a time (b) in which an operation of the sound amplifying circuit 8 is unstable, and then a silent signal period of the sound generating member 10 is accommodated. |
