JPH04123A - Electrical cooking device - Google Patents

Abstract

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.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric cooker equipped with a notification means for use in general households.

2. Description of the Related Art Conventionally, when an electric cooking appliance of this kind is used to provide voice notification, a control member generally controls a sound generation instruction of a sound generation member via a sound synthesis circuit and a sound amplification circuit. Moreover, if power is constantly supplied to the audio amplification circuit, the audio output from the audio synthesis LSI will be
Since the power is supplied to the speaker through the amplifier, and the speaker is always connected to the amplifier, the noise generated by the amplifier itself is output from the speaker, and even in a silent state where there is no high-power audio, this noise can be heard. There was a lot of inconvenience. Therefore, when using a conventional electric cooker to provide audio notification, if power is constantly supplied to the audio amplification circuit, noise may be generated from the speaker even when there is no instruction to generate audio signals, and the audio notification may be generated. It's noisy at other times.

Furthermore, as in the conventional example disclosed in Japanese Utility Model Application Publication No. 64-23096, when inputting (turning on) an output signal (power supply) to the microcomputer (control unit) only when a buzzer sound is generated, the boat output of the control unit is Due to instability, the astable vibrator oscillates and the buzzer operates, producing unnecessary buzzer sound. Therefore,
In order to miniaturize the power supply circuit in electric cookers,
Normally, the power supply to the audio amplification circuit, which consumes a large amount of power, is
Even if you turn the power off and supply power only for voice notification, the voice signal input to the voice amplification circuit will not be clear until the operation of the voice amplification circuit stabilizes after power is supplied. No audio output is available.

Problems to be Solved by the Invention However, in the case of Utility Model Application Publication No. 61-56700, when an audio signal is output from a speech synthesis LSI, the audio signal is amplified by an amplifier and output from a speaker. Time-limited emphasis is taken so that the operation signal of the switch means is output from the speech synthesis LSI at least 5.7m5ec before , so that you don't have to worry about noise coming from the amplifier. However, in the unlikely event that this time-limited emphasis is broken and the condition for operation of the switch means, that is, for outputting an audio signal, arises, a situation may arise in which noise generated from the amplifier itself is output from the speaker.

In addition, in the device according to Japanese Utility Model Application Publication No. 64-23096, a delay circuit is connected that prohibits signal output to the buzzer for a certain period of time after power is turned on to the control circuit to prevent unnecessary buzzer sounds. If so.

As well as measures to prevent such unnecessary buzzer sounds, it is recommended not to input audio signals until the operation of the audio amplifier circuit is determined immediately after power is supplied. If a delay time is provided until the notification operation becomes stable, there will be problems such as problems in case of urgent need.

Means for Solving the Problems The present invention has been made in order to solve the above-mentioned problems, and provides drive instructions for the notification sound generating member and sound generation of the sound generating member via a sound synthesis circuit and a sound amplification circuit. The system includes a control member for controlling instructions, supplies power to the sound amplification circuit only when sound is generated from the sound generation member, and starts driving the notification sound generation member from the time the power supply starts to be supplied to the sound amplification circuit. and controls a series of processes of driving the notification sound generating member and generating sound of the sound generating member through a control member, such as starting the sound generation of the sound generating member after the driving of the notification sound generating member has stopped. It is.

Effect As described above, when performing audio notification, power is supplied to the audio amplification circuit by the output from the control member, but the operation of the audio amplification circuit may be unstable immediately after power is supplied. A certain period of time is set as a no-speech signal section via a control member. Therefore, during the no-voice signal period, the control member outputs a drive signal for the notification sound generating member to produce a buzzer sound, filling in the no-voice signal period of the sound generating member. After the certain period of time when the operation of the audio amplification circuit becomes stable, the audio generation member generates audio.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of the control circuit of this embodiment, and FIG. 2 shows a timing chart when notification sound and voice are generated.

In the figure, 1 is a control member such as a microcomputer that controls the operating state of the electric cooker. Reference numeral 2 denotes a notification sound generating member such as a buzzer, which is connected to the buzzer output port 3 of the control member 1, so that the notification sound is generated by the output from the buzzer output port 3. 4 is a control output port of the audio amplification circuit 8 provided in the control member 1, which is a part that outputs a signal when the power supply 5 is supplied to the audio amplification circuit 8;
It is connected to the base of a transistor 9 for controlling the supply of a power source 5 whose drive is controlled by a signal from the control output port 4 . Reference numeral 6 denotes a speech synthesis circuit, which performs speech synthesis in response to a control signal from the control member 1. 7 is a band pass filter (B, P.

In F), only the corresponding frequency band of the speech synthesis output from the speech synthesis circuit 6 is passed (filtered), and the filtered speech synthesis output is output to the speech amplification circuit 8. Reference numeral 10 denotes a sound generating member such as a speaker, to which the output of the sound amplification circuit 8 is connected. The audio amplification circuit 8 is supplied with the power 5 only when the signal from the control output port 4 is input to the base of the transistor 9, and the audio amplification circuit 8 operates. is starting to occur.

Next, the operation of this embodiment having the above configuration will be explained.

When performing audio notification during operation of the electric cooker, a signal is input to the base of the transistor 9 by the output from the control output port 4 of the control member 1 to turn on the transistor 9, and the power source 5 is supplied to the audio amplification circuit 8. do. Since this audio amplification circuit 8 operates unstable from time point a to time point b in FIG. The control member 1 controls so that the audio notification signal is generated after time b when the operation of the audio amplification circuit 8 becomes stable.

On the other hand, at the same time as the signal output from the control output port 4 is transmitted, a drive signal for the notification sound generating member 2 is also output from the buzzer output port 3. Moreover, this output produces a buzzer sound from time point a to time point b, when the operation of the sound amplifying circuit 8 is unstable, to fill in the non-speech signal section of the sound generating member 10. Subsequently, after time b when the operation of the audio amplification circuit 8 becomes stable, the audio generation member 10 generates audio.

After the point C when the sound generation operation ends, the control output port 4
The signal output from the audio amplification circuit 8 is stopped, the transistor 9 is turned off, and the supply of the power source 5 to the audio amplification circuit 8 is stopped again.

According to the present invention, power is supplied to the sound amplification circuit only when driving the sound generation member, and when the power supply starts to be supplied to the sound amplification circuit, the driving of the notification sound generation member is started. However, since the sound generation member starts generating sound after the driving of the notification sound generation member stops, the operation of the sound amplification circuit, which exhibits unstable operation immediately after power is supplied to the sound amplification circuit, is stabilized. Until now, for example, a buzzer has been sounded to prepare the sound generation component for sound notification, and the sound notification is now performed after the operation of the sound amplification circuit has stabilized.Usually, the power supply to the sound amplification circuit, which consumes relatively large amount of power among the circuits, is used. In addition to stopping the supply of electricity, even if the power is supplied only during the voice notification, it provides a quick and clear voice notification to improve safety when using an electric cooker.

Furthermore, it is possible to reduce the size of the power supply for the control circuit, and also to make the shape of the cooker itself more compact, thereby providing an electric cooker with improved usability.

[Brief explanation of drawings]

The first tooth is a block diagram of a control circuit of an electric cooker showing one embodiment of the present invention, and FIG. 2 is a timing chart when a broadcast notification sound and voice are generated. 1... Control member, 2... Notification sound generating member, 5
...power supply, 6...speech synthesis circuit, 8...
- Sound amplification circuit, 10... sound generation member. Applicant Hitachi Homechick Co., Ltd. Figure 1

Claims (1)

[Claims] Drive instructions for the notification sound generating member (2) and voice synthesis circuit (6)
) and a sound generating member (10) via a sound amplification circuit (8).
) In an electric cooking appliance equipped with a control member (1) that controls a sound generation instruction, an instruction to supply power (5) to a sound amplification circuit (8) when a sound generation instruction is given, and a control member (1) that controls a sound generation instruction of the amplification circuit (
2) A driving instruction for the notification sound generating member (2) that starts at the same time as the supply of power (5) to the device starts, and sound generation of the sound generating member (10) that starts after the driving of the notification sound generating member (2) is stopped. An electric cooking appliance characterized in that instructions are given through the control member (1).