JPH0441010B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a device for preventing erroneous operation of a rice cooker.

(Prior Art) Conventionally, a rice cooker with a built-in microcomputer is provided with a cancellation switch so that the input of a predetermined command signal can be canceled.

(Problem to be Solved by the Invention) However, if the cancel switch is pressed due to a child's mischief or erroneous operation during the timer operation, rice cooking operation, or warming operation, the program that was running until then will be reset. There were problems with the rice not being cooked properly or the rice spoiling. In addition, there are devices that do not accept the cancellation signal even if you press the cancel switch during rice cooking, but this inconvenience is that if you press the rice cooking switch by mistake and try to correct it, you cannot cancel it. It was hot.

(Means for Solving the Problem) As a means for solving this problem, the present invention provides a clock signal generating means including a switch means for generating a cancellation command signal, and a clock signal generating means that starts measuring time upon receiving the clock signal. a time measuring means, a storage means for storing a preset cancellation command reception time from receiving the cancellation command signal to receiving the next cancellation command signal, and comparing the measured time of the time measurement means and the cancellation command reception time. , a cancellation determination means which outputs a cancellation signal only when the next cancellation command signal is input within the cancellation command reception time, and outputs a reset signal to reset the timer every time the reception time is exceeded. The present invention provides a device for preventing erroneous operation.

(Function) The rice cooker erroneous operation prevention device according to the present invention is provided when one or two types of switch means are pressed consecutively within a predetermined period of time, for example, within one second, during timer operation, rice cooking operation, or warming operation. Only when the cancellation command signal is received, the previously input command is canceled, and in other cases, the cancellation command signal is ignored and the state before the switch means is pressed is maintained.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1 showing a block diagram of the device for preventing erroneous operation of a rice cooker according to the present invention, reference numeral 1 denotes a clock signal generating means, which outputs a clock signal when a cancel command signal is issued from a switch means, for example, a cancel switch 5. do. 2 is a storage means (read-only memory), and this storage means 2 stores the time when the cancellation command signal can be accepted as valid when the cancellation switch 5 is pressed again after the cancellation switch 5 has been pressed. . Reference numeral 3 denotes a clock means that starts measuring time and outputs a time signal every time a cancellation command signal is input. Reference numeral 4 denotes a cancellation determination means, which compares the measured time from the clock means 3 and the cancellation command reception time, and outputs a cancellation signal only when the second cancellation command signal is input within the cancellation command reception time, and performs the measurement. Each time the time exceeds the cancellation command reception time, a reset signal is outputted to reset the clock means. 5 is the cancel switch,
6 is a rice cooker switch, 7 is a heat retention switch, and 8 is a lock switch.

Incidentally, the clock signal generating means 1, the storage means 2, the clock means and the cancellation command means 4 are each composed of a one-chip microcomputer.

Second regarding the operation of the erroneous operation prevention device having the above configuration.
The explanation will be made with reference to the flowchart shown in the figure. Assuming that the rice cooker is currently in the rice cooking operation, if you want to cancel this rice cooking operation, press the cancel switch 5, and the time signal generating means 1 will determine the on/off state of the cancel switch 5.
A clock signal is output (step 1), and upon receiving the clock signal, the clock means 3 starts measuring time. In step 2, the measured time from the clock means 3 and the cancellation command reception time from the storage means 2 are compared by the cancellation determination means 4, and if the measured time is within the cancellation command reception time, for example, 1 second, the process proceeds to step 3. When the cancellation command signal is input, a cancellation signal is output. However, if the cancellation switch 5 is not turned on within a predetermined time, that is, if the cancellation command signal is input, the cancellation signal is output. If the second cancellation command signal is not input, the process returns to step 2, where it is again determined whether 1 second has elapsed. If 1 second has not elapsed, the above operation is repeated, and if 1 second has elapsed, then Outputs a reset signal (step 2) and clocks the timer 3.
The time measurement is reset and the rice cooking operation continues.

In addition, although the above explanation describes the operation during rice cooking, even if the rice cooker is in warming operation or timer operation, it can be determined whether or not the operation of the switch means is erroneous in the same way as in rice cooking operation. will be carried out.

Further, in the embodiment described above, when the cancel switch 5 is pressed twice in a row within a predetermined period of time, the operation is canceled, but as a switch means for generating a cancel signal, a combination of the cancel switch 5 and the rice cooking switch 6, You may use a combination of the cancel switch 5 and the keep warm switch 7, or the combination of the rice cooker switch 6 and the keep warm switch 7, or if there is no cancel switch, use the rice cook switch or keep warm switch alone, etc. You can also combine the switches on the panel as you like.

In the embodiment of the present invention, a lock switch 8 is provided as shown by the broken line in FIG. Inputs from all switch means are not accepted. Canceling the operation of each mode is accomplished by pressing the lock switch 8 again to release the lock, and then pressing the cancel switch 5 which generates the cancel signal. in this case,
The lock switch 8 and the cancel switch 5 function as switch means for generating a cancel signal.

(Effects of the Invention) As is clear from the above description, according to the present invention, the operation of the rice cooker will not be interrupted even if the cancel switch is pressed by mistake, and the cancellation can be easily and reliably performed when the cancel switch is pressed. It is possible to prevent erroneous operations with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a device for preventing erroneous operation of a rice cooker according to the present invention, and FIG. 2 is a flowchart thereof. 1...Cancel switch, 2...Storage means, 3
...Time measuring means, 4...Cancellation determination means, 5...
Cancel switch, 6...Rice cooking switch, 7...
Heat retention switch, 8...Lock switch.

Claims (1)

[Claims] 1. A clock signal generating means equipped with a switch means for generating a cancellation command signal, a clocking means for starting time measurement upon receiving a clock signal, and a clock signal generating means having a switch means for generating a cancellation command signal, a clock means for starting time measurement upon receiving a clock signal, and a clock signal generating means having a switch means for generating a cancellation command signal, and a time measurement means for starting time measurement upon receiving a clock signal, and a clock signal generating means having a switch means for generating a cancellation command signal, and a time measurement means for starting time measurement upon receiving a clock signal, and a clock signal generation means having a switch means for generating a cancellation command signal. A storage means for storing a preset cancellation command reception time compares the time measured by the clock means with the cancellation command reception time, and generates a cancellation signal only when the next cancellation command signal is input within the cancellation command reception time. A device for preventing erroneous operation of a rice cooker, comprising a cancellation determination means for outputting a reset signal for resetting a timer every time an acceptance time is exceeded.