JPS594828A - Cooking unit - Google Patents

Abstract

PURPOSE:To save an electrical energy, extend a life of electrical components and prevent a speaker noise during non-voice period by a method wherein the part relating to a voice output of a voice synthesizing device etc. is energized during only a specific period in which the voice is to be fed out and no energization is made during the remaining period. CONSTITUTION:A control unit 1 generates a signal to cause a switch transistor Q1 to be conductive in synchroneous with a period in which a signal is produced by the control part 1 in respect to the voice synthesizing device 5 in order to produce the voice output of desired message from the speaker 7, so that an electrical power is applied to the voice output part without any trouble and the desired voice is generated. In case that it is not necessary to produce a voice output, the transistor Q1 is kept OFF and the supplying of electrical power to the voice output part is shut off. Since a buffer 4 for oven collector is installed between the voice synthesizing device 5 and the control part 1, an electric current in the control part 1 does not flow to the voice synthesizing part and the shutting-off of the power supply for the voice output part is positively performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cooking appliance equipped with a speech synthesizer.

Recently, we have provided voice guidance on how to operate, cook, etc.

Cooking devices such as microwave ovens that are taught have been put into practical use. These types of cookers are equipped with a microcomputer so that they can be used to cook a variety of menus, and this microcomputer also has a timer function, displays the remaining time, and can also be used to display menus. It is equipped with a numeric display using LEDs to display key-in contents when making selections, cooking time settings, etc., and it also has a clock function (that is, time display function) so that it can be used even when the cooker is not in use. ) is given. Therefore, in the past, the electronic circuits of the control system, including the voice synthesizer, were always energized. The present invention focuses on the fact that it is sufficient to energize the parts related to audio output such as a speech synthesizer only during the special period when audio is to be output, and cut off the energization for the remaining period to save power and extend the life of parts. An object of the present invention is to provide a cooking device that can prevent speaker noise during silent periods.

The present invention will be explained in detail below based on the drawings showing an embodiment in a microwave oven. The drawing is a block diagram showing one embodiment of the present invention, and 1 is a control unit using a microcomputer composed of a CPU, ROM, RAM, etc., and serves as the control center of this cooker. There is. 11r/i This is a keyboard for inputting commands such as cooking time and menu, and operation inputs are read into the control section 1. Control part 1
is designed to output a required signal to the drive circuit 3 of the magnetron 31 based on this operational input, input from a sensor (not shown), etc. 2 is a DC power supply circuit, which controls the AT section I and the sound synthesis system by step-down and rectification of the commercial frequency power supply! The configuration is such that a DC voltage is applied to 51.5 *.

The synthesis device 5 consists of a speech synthesis LSI 51 and a ROM 52 that stores data related to voiced messages, and the microcomputer constituting the control section 1 is a speech synthesis device W.
The control program is configured so that it also functions as a control device of No. 5. An open collector buffer 4 is interposed between the control section 1 and the synthesis device 5 as an interface between the two. The output of the voice synthesizer 5 is input to the voice signal amplifier 6, where it is amplified to a required level and then given to the speaker 7, and a message corresponding to the signal emitted from the control unit 1 is output from the speaker 7. become. The audio output sections such as the audio synthesizer 5 and the audio signal amplifier 6 are configured to be supplied with power from the DC power supply circuit 2 via the switch transistor Q1. The control section 1 is configured to output a signal to make the switch transistor Q1 conductive from a predetermined port in synchronization with a period in which a signal to be outputted as a sound is outputted to the speech synthesizer 5.

In the cooking appliance of the present invention configured as described above, the switch transistor QI is activated in synchronization with the period in which the control unit 1 outputs a signal to the voice synthesizer 5 to cause the speaker 7 to output a predetermined message voice. Since the control section 1 issues a signal to make the audio conductive, power is supplied to the audio output section without any problem during this time, and the desired audio is emitted. On the other hand, if there is no need to output audio, transistor Q1
is off, and the power supply to the audio output section is cut off. An open collector buffer 4 is interposed between the speech synthesizer 5 and the control unit 1.

Therefore, the current in the restraint section 1 does not flow to the audio output section, and the power to the audio output section can be shut off reliably.

Furthermore, the period during which the switch transistor Q1 is conductive, that is, the period during which power is supplied to the audio output section, needs to be perfectly matched to the audio output period, and of course may be slightly longer than that period. It is.

As described above, the cooking appliance according to the present invention includes means for selectively supplying power to the audio output section including the audio synthesis device during a specific period including the time of audio output in the cooking appliance equipped with the audio synthesis device. Since it is a preparedness feature, it is possible to save electricity by cutting off the power during unnecessary times, and it is also possible to extend the life of electronic components. Furthermore, in conventional microwave ovens equipped with a voice synthesizer, noise is mixed into the voice output section when the magnetron oscillates at high frequencies, making it impossible to avoid speaker noise during the so-called silent period. The present invention has excellent effects such as being able to prevent this noise by cutting off the power supply.

[Brief explanation of the drawing]

The drawing shows one embodiment of the invention, and is a schematic block diagram of a circuit of a microwave oven according to the present invention.

Claims (1)

[Claims] 1. A cooking appliance equipped with a voice synthesis device, characterized in that the cooking appliance is equipped with means for selectively supplying power to the voice output section including the voice synthesis device during a specific period including the time of voice output.