JPS5924882Y2 - cooker control panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the layout of a control panel of a cooker having an electronic memory in which multi-step cooking times and their outputs are programmable.

Conventional cooking appliances such as electric ovens, electric ranges, microwave ovens, and induction heaters use mechanical timer devices and switch devices to adjust the heat or output of cooking devices, so it is not possible to execute a multi-step cooking program. It was difficult.

Therefore, the present invention provides a cooker equipped with an electronic memory to store a series of cooking programs and automatically execute them. The present invention is intended to provide an ingenious layout of setting push buttons and the control panel surface of each of these displays.

Hereinafter, the present invention will be explained in detail using an example in which the present invention is applied to a microwave oven, which is one type of cooking device.

Figure 1 is a front view of a microwave oven, and its front shape is:
It consists of a door 1 and a control panel 2 on which control parts such as a timer for setting cooking time are arranged.

FIG. 2 is an enlarged view of the control panel 2 in detail.

3 in the figure is a digital time display for checking cooking time, which is arranged so that hours, minutes, and seconds can be displayed independently.

Reference numerals 4, 5, and 6 indicate three push buttons for setting cooking time arranged directly below the display 3, and are arranged corresponding to the hours, minutes, and seconds display portions of the display 3, respectively.

7 is a step display for displaying program steps, and push buttons 8 and 9 for selecting high frequency output are provided directly below this.
, 10.11, there are 7 step number display lamps (display sections) for each push button, for a total of 28 step number display lamps (display sections).

The push button 8 is for selecting a strong output, the push button 9 is for a medium output, the push button 10 is for a weak output, and the push button 11 is for defrosting, or an intermittent low output suitable for defrosting.

12.13 are control push buttons for correction and pause, respectively;
Furthermore, 14 is a push button for starting cooking, and the functions of these push buttons will be described later.

Details of a control circuit device for a microwave oven having such a layout of the control panel 2 will be explained with reference to FIGS. 3 and 4.

FIG. 3 is a block diagram of a control circuit device for a microwave oven, and O3I and O32 in the figure are 2, respectively.

This is an ultra-low frequency pulse oscillator that independently generates 5 pulse trains, and these output pulses are sent to two-circuit switches SW4, . SW5. It is input to the display register DREG via SW6.

Note that when the push buttons 4 to 6 are lightly pressed, only one circuit of these switches SW4 to SW6 is closed, and the oscillator O51 is closed.
2 Hz pulse from , and 2 Hz pulse when pressed deeply
Both circuits are closed or operate so that a 2Hz pulse and a 5Hz pulse can be simultaneously input to the register DREG from both total generators O51 and O32.

The contents of this register DREG are displayed on the digital time display 3.
It is displayed digitally.

Also, this register DREG is connected to switches SW4 to SW6.
While writing the cooking time, the counter is configured with a sexagesimal time counter that prohibits carry from seconds to minutes and from minutes to hours so that hours, minutes, and seconds can be written independently.

In other words, when setting the cooking time, the counters for hours, minutes, and seconds each count human pulses independently, so the minutes and seconds after 59 are O without any carry, and the hours after 11 are It will return to 0.

On the other hand, when measuring time, the circuit is configured in such a way that subtraction is started from the seconds counter in the lower digits by one pulse from the timing pulse oscillator O5C, and the digits from the hour counter are sequentially lowered by the minutes in the upper digits. .

DETl is set when the contents of register DREG are zero, that is, (0: 0
This is a zero detector that detects the state of 0:00) and outputs a time limit signal, and this output signal completes the cooking of that step.

Next, the switch SW8. is closed by the output selection pushbuttons 8, 9, 10.11. SW9, 5W10, 5W1
1 is for inputting a code signal corresponding to the corresponding output and a code signal representing the closing order of each switch as a step number to the buffer register BREG, and this register BREG also has a code signal corresponding to the pause push button 13. A code signal corresponding to a temporary stop is also input from the switch 5W13.

Further, this register BREG is connected to the output signal SP from the one-shot multivibrator MM and the switches SW4 to SW4.
The structure is such that a shift for reading out the contents is performed by a closing signal of one of SW6.

Incidentally, each of the above code signals is determined as follows in this embodiment.

Further, the step number for the end and temporary stop commands is always set to O.

Therefore, it is sufficient for this buffer register BREG to have a 6-bit capacity for temporarily storing one step number and the output command for that step.

PREG is a program memory for storing step numbers and their instructions stored in the buffer register BREG in step order, and is a circular shift register that is circularly shifted one step at a time by a shift pulse SP from the one-shot multivibrator MM. It is made up of.

Note that this multivibrator MM is triggered by the output of the switch 5W14 of the cooking push button 14 and the output of the zero detector DET1.

Further, in this embodiment, the program memory PREG has a capacity of 84 bits, with the maximum number of output selection steps being 7 steps, and considering the possibility that a temporary stop command may be inserted between each step.

Further, the buffer register BREG and the program memory PREG can be configured as either an all-bit serial type or a 6-bit parallel digit-serial type, but in the case of an all-bit serial type register, a serial-parallel converter is installed on the input/output side. Of course, this will be necessary.

Further, the output command from the memory PREG is supplied to an output switching circuit (not shown) within the microwave oven body, where the high frequency output is selected according to the command.

The TDM has a number of addresses corresponding to the step numbers stored in the program memory PREG, and displays the cooking time data inputted in the display register DREG to the corresponding address according to the step number from the memory PREG. This is a time data memory for writing and storing information, and in this embodiment, it is constituted by a random access memory (RAM).

DRY is a drive circuit for the step indicator 7 which displays the step number and its selection output from the program memory PREG, and the details of this circuit will be described later.

ANDI is an AND gate for supplying the clock pulse from the clock pulse oscillator O5C to the display register DREG from the generation of the shift pulse from the multivibrator MM to the generation of the time limit signal of the zero detector DET1, and the FF
1 is a flip-flop to obtain the time width for this purpose.

In addition, DET2 detects the end (000) and temporary stop (111) of the program memory PREG, and the bell B
This is a detector for sounding L.

Note that the clear signal CL from the switch 5W12 of the correction push button 12 is input to the display register DREG, and
Program memory PREG and time data memory TD
It is also supplied to M.

Next, details of the step indicator 7 and its drive circuit DRV will be explained with reference to FIG.

1 set of 7 lamps to display step numbers 1 to 7
4 groups of indicators LMPI, LMP2
．． LMP3. LMP4 includes four transistors TrH, TrM, TrL, TrDF for group designation,
Seven transistors Trl for specifying step numbers.

The circuit is configured such that time-division lighting control is performed by Tr2...Tr7, and four transistors TrH, TrM, TrL, TrDF for group designation and seven transistors Trl for step number designation. ~Tr
7, only the lamps connected in series with the conductive transistor can be turned on, and this time-division lighting control system can, in principle, turn on 4 groups of 7 lamps as in this embodiment. The display device equipped with the above-mentioned display device requires only 4+7211 switching elements such as control transistors, which simplifies the circuit configuration.

Now, in this embodiment, in addition to general time-division lighting control,
Furthermore, one switching transistor TrG is replaced with group designating transistors TrH, TrM, TrL.
, TrDF and includes a buffer resistor DBG and other logic circuits to control the bases of all these transistors.

That is, the transistor TrG has a flip-flop FF2.
The output of the oscilloscope and the 5-stop pulse from the ultra-low frequency pulse oscillator O82 are supplied via OR1.

Furthermore, the flip-flop FF2 is set and reset by the cyclic shift pulse CP of the register DBG and the output command END of the register DBG, that is, the delayed output from the (000) detector DET3, and is set and reset by the cyclic shift pulse CP of the register DBG and the delayed output from the (000) detector DET3. The output is interrupted only for a period of '' until the input of the cyclic shift pulse CP.

In addition, register DBG is connected to memory PR to receive all programs stored in program memory PREG.
It has a capacity on the same order of magnitude as EG.

However, this register DBG always has a cycle so as to constitute a circular register, and its contents are shifted at high speed.
The step number and the selected output command are repeatedly read, and the respective signals are sent to the switching transistors Tr1 to T.
r7 and TrH, TrM.

TrL and TrDF are input to the base, and the on/off is controlled to display the display lamp in a time-division manner.
When the shift pulse SP arrives from the inverter INV
, Antogame) AND2 opens the circulation path,
The circulation of the digit contents of register DBG is broken.

Therefore, the digit contents of the register DBG are the same as the digit contents of the memory PREG at the start of the program step, but as the program step progresses, the digit contents are read out and discarded.

In the circuit configuration as described above, the operation thereof will next be explained using a specific example.

First, the program to be executed by this circuit device is set as follows.

Defrosting (DF): 10 minutes → Strong output (H): 1 minute 50 seconds → Medium output (M): 2 minutes 05 seconds → Low output (L): 5 minutes → Stop (STOP) → Medium output (M) : 45 seconds: Low output (L): 5 minutes.

Now, when writing the above program into this circuit device, first push the time setting push buttons 4 to 6, and the middle push button 5, so that the digital time display 3 displays (0:10:00).
) When the push button 5 is released, this time setting is completed.

That is, when the push button 5 is pressed lightly, the switch SW
2) (Z pulses from oscillator O51 via 5 are input to the minute counter of register DREG and register D
The digit content of REG is from (0:00:00) to (0:
01:00), (0:02:00) and 1
It increases with every nokuru and reaches (0: 10: 00).

The count contents of this register DREG are displayed every moment on the display 3.
The contents can be easily checked.

Therefore, if the push button 5 is released when the display shows (0:10:00), there will be almost no setting errors.

Further, the time required to set this 10 minutes is only 5 seconds even when the push button 5 is pressed lightly.

On the other hand, in the unlikely event that you make a mistake in operating the push button 5 and are unable to make the appropriate settings, you can simply press the push button 5 again for less than 10 minutes and then release the push button 5 when the 10 minutes have passed.
If the setting exceeds 10 minutes, press push button 5 deeply, and when the display goes through the cycle and exceeds (o: oo: oo) and approaches (0: 10: 00) again, press push button 5. If you press it lightly, you can set the time in the same way as mentioned above.

In addition, press button 5 deeply to register the 5th stop pulse.
Even if the time is sent to the EG, the circuit is configured so that no carry from minutes to hours occurs during time setting, so the display will be (0: 59: 00) followed by (0: 00: 0).
0).

Therefore, there is no need to press the clear button for this time setting.

In addition, the deep pressing mechanism of push buttons 4 to 6 is not only used when a setting error is made, but also when a relatively large amount of time, minutes, or seconds, such as 50 minutes, is used. When setting, press the button deeply to fast-forward the display until the time is near, which can also be used to shorten the time required for setting.

Furthermore, the pulse frequencies of 2Hz and 5Hz of the oscillators O31 and O32 used for time setting were determined experimentally in consideration of the followability of human vision. The frequency is slower than the time delay time,
5Hz is a frequency that allows the movement of numbers to be monitored.

Now, after setting 10 minutes as described above, press the defrost button 11 of the output selection push buttons 8 to 11, and the register B
The output command code signal (100) and the code signal (001) corresponding to step number 1 are manually input to REG.

Furthermore, even if one of the push buttons 8 to 10 is operated by mistake, if the push button 11 is pressed correctly again, the previously input output command code signal is rewritten with the correct output command code signal (100).

The contents of this register BREG are the following time setting push buttons 4~
It is transferred to the memory PREG at the timing when 6 is pressed.

Also, the time set in the register DREG is also stored in the memory TD.
It is stored at address 1 of M.

Next, in the same way as last time, program the output in the order of time for high output 1 minute 50 seconds, medium output 2 minutes 05 seconds, and low output 5 minutes, and set the set time and select in the memory TDM and PREG respectively. The output command and its step number are stored.

Now, when you press the pause button 13 after setting the weak output for 5 minutes, the code signal (000) corresponding to step number 0 and the output command code signal (
111) is input.

After that, if you input the program again in the order of medium output for 45 seconds and low output for 5 minutes, the third
As shown in the figure, the set time is stored in the memory address corresponding to each step number.

Although time is shown in decimal numbers for ease of understanding in FIG. 3, it goes without saying that these decimal numbers are encoded and stored according to the previously determined code.

Further, the program memory PREG stores the same contents as those written in the register DBG in FIG. 4.

Although the contents of this register DBG are shown in decimal numbers and alphabets in order to make it easier to understand in FIG. 4, in reality, these are also encoded and stored.

Furthermore, the END of register DBG is (00
0), and this END instruction simply indicates that no other instruction has been input into the register DBG, and there is no need to input a special fan cushion.

The set time programmed in the above manner and its output step number are displayed on the step display 7.

That is, the transistors Trl to Tr7 whose bases are controlled by the step number output of the register DBG select the number lamps 1 to 7 of the step indicator 7, while the transistors TrH whose bases are controlled by the selection output command of the register DBG.

Either TrM, TrL or TrDF is selected,
The steps are displayed on the step display 7 as shown in FIG. 3 or 4.

This is a so-called time-division control display system, and requires fewer switching elements for driving lamps.

In this type of method, the indicator lamp repeatedly blinks, but
If the blinking period is short, the eye's afterimage effect will cause the light to appear as if it were continuously lit.

Next, when running the program configured as above,
When the cooking push button 14 is pressed, the program memory PREG
The DF with step number 1 is read out, the defrosting command is sent to the output switching circuit (not shown) of the microwave oven, and the defrosting output is selected as the output.

On the other hand, step number 1 of this program memory PREG
(0:10:00) is read out to the display register DREG from the time data memory TDM addressed by Turns on and high frequency output for decompression is output.

The contents of this register DREG are the clock pulse oscillator O3C.
It is subtracted by one stop pulse from .

This situation is displayed on the display 3.

On the other hand, the step indicator 7 indicates that the instruction in the register DBG is E.
Until the first cyclic shift pulse CP arrives after changing from ND to DF, that is, during the readout of step number 1, the flip flow rough lower F2 is reset, so the transistor TrG is turned on and off by 5 small pulses of the oscillator O52. Therefore, only the decompression step number l is decremented, and the other steps to be displayed continue to be lit.

Then, when 10 minutes have passed from the start of cooking, the register DRE
The count content of G becomes (o : oo : oo), a time limit signal is generated from the detector DET1, the timer switch in the main body is turned off, and the flip flow rough FF is turned off.
1 stops the supply of clock pulses to the register DREG, and further advances the program memory PREG by one step.

As the program memory PREG advances by one step, the output command H of step number 2 is read out again, and the output switching circuit is switched to the strong output.

Also, from the time data memory TDM, from number 2 (0:
01:50) is read to register DREG,
The time limit output disappears again and the timer switch is turned on.

Then, high-output heating is performed in the same manner as in the previous defrosting operation.

On the other hand, the step number l is read out and step numbers 2 to 6 are stored in the register DBG as the process progresses by l steps.

Therefore, the lamp of step number 1 on the step indicator 7 is not lit, the lamp of step number 2 blinks, and the remaining lamps of step numbers 3 to 6 are lit continuously.

In this way, cooking progresses to the program of step number 4, and when low power heating is performed for 5 minutes in this step, next step number 0 is stored from the program memory PREG.
and output command 5TOP (111) are read out.

Therefore, the detector DET2 detects (111) and the bell BL for notifying the end of cooking rings.

On the other hand, at this time, the time data is not read out from the time data memory TDM, the contents of the display register DREG remain (o:oo:oo), and the timer switch remains off.

Further, on the step indicator 7, the lamps of step numbers 5 and 6 continue to be lit.

This is step number 1 of the contents of register DBG.
The contents of ~4 are read out and the instruction 5TOP (111) with step number O is located at the beginning of the register DBG. Transistors TrH, TrM, TrL, TrD that drive the display device 7
F.

None of Trl to Tr7 is turned on, and even if the transistor TrG is repeatedly turned on and off by the 5 pulses of the oscillator O32, the lamp does not blink.

In other words, if there is a pause step while the program is in progress, the microwave oven will stop its heating operation at this point.
The step indicator 7 continues to illuminate the remaining steps, and the time indicator 3 continues to display (0:00:00).

Therefore, if you touch the food being cooked during this pause period and press the cooking push button 14 again, a shift pulse SP is input to the program memory PREG via the multivibrator MM, and the next program step is read out. The program proceeds in the same manner as described above.

Then, when the operation of step number 6 is completed, the detector D
(000) is detected at ET 2 and the bell BL rings.

All program steps at this point All the lamps on the display 7 turn off.

Therefore, the operator is notified that all programmed cooking steps have been completed.

In this way, a series of cooking operations are performed according to the type of heating output and the time period for each step that are initially programmed.

Moreover, the progress of the program is always displayed on the step indicator 7.
During the heating operation, the lamp corresponding to the step number being executed flashes, and you can also tell which type is selected by the flashing lamp.

On the other hand, since the step completion lamp is off, it is easy to see which step the cooking process has been completed.

Also, because the numbers of executed program steps are turned off, if the program is paused in the middle, only the number lamps of unexecuted steps will continue to be lit, and the blinking lamps will remain lit. Since there is no, you can immediately tell that it is a temporary stop.

By the way, the biggest feature of this circuit device is that once the type of heating output of the programmed step and its setting time remain stored in the program memory PREG and time data memory TDM, the power of this circuit device is not turned off. Its memory contents are retained.

Therefore, if you want to cook using the same program again, simply press the cooking push button 14 again and the step indicator 7 will light up the lamps of all the programmed steps again, and the same operation as above will be repeated and the same as last time. The program can be executed.

On the other hand, if you want to erase the previous program and write a new program, press the correction button 12, clear the contents of the program memory PREG and time data memory TDM, and then perform the write operation again in the same manner as described above. All you have to do is

As mentioned above, this circuit device uses an all-electronic circuit to program the cooking time and output selection of the microwave oven over multiple steps, and is more complex than conventional devices equipped with mechanical timers. It even allows you to cook food, which previously took time and effort, by simply programming it.

Furthermore, since time setting can be performed by simply pressing three push buttons for hours, minutes, and seconds, time setting is easier than with a set of ten keys.

Furthermore, the all-electronic control makes the overall size of the control device relatively compact, and furthermore, if this circuit device is configured using a microcomputer, it can be made even more compact.

Note that the layout of the control panel in this example is as follows.
In addition to what is shown in the figure, modifications such as those shown in Figure 5 or, for horizontal panels, Figure 6 may also be considered.Furthermore, the arrangement of the lamps of the step indicator may be as shown in Figure 7. Good too.

This modification of the layout is due to the fact that since this circuit device is all electronic, the mutual positional relationships of the push buttons, lamps, and time indicators that appear on the control panel surface are mechanically restricted depending on the position of the parts. Compared to standard timers, this point allows for a high degree of freedom in the design of the control panel.

Furthermore, the step display 7 on the control panel 2 shown in FIG. On the other hand, the step display 7 shown in FIG. 7 has push buttons 8 to 11 for output selection and step numbers arranged vertically and horizontally, and lamps arranged in a matrix. It is.

As explained above, the present invention provides a control panel of a cooker equipped with an electronic memory in which the cooking time and its output can be programmed for three or more steps, and a push button for setting the cooking time and a cooking time set by the push button. A digital time display for displaying the output is arranged in one group, and a push button for output selection and a step display for displaying the output selected by the push button for each step are arranged in another group on the panel. Therefore, when selecting and setting the cooking time and output for each step, it can be easily and accurately operated using dedicated push buttons that individually correspond to each display. The step display that displays the output for each step has a number of display sections that are equal to the total number of programmable steps multiplied by the number of selectable output types, and are arranged in order in step order. In addition, even when programming in advance, the output state for each step can be easily grasped at a glance, and the program contents can be monitored extremely easily, which provides excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a microwave oven for explaining one embodiment of the present invention, Fig. 2 is an enlarged view of its control panel,
Figure 3 is a circuit diagram of the control circuit device, Figure 4 is a detailed diagram of the drive circuit for the step indicator, Figure 5 is a layout diagram of a control panel showing another embodiment, and Figure 6 is a horizontal control panel. FIG. 7 is a layout diagram of main parts of a control panel showing another embodiment of the step display. In the figure, 2 is a control panel, 3 is a digital time display, 4, 5.6 are push buttons for hours, minutes, and seconds for setting the time.
7 is a stop indicator, 8, 9, 10.11 are push buttons for output selection, 12 is a correction push button, 13 is a temporary stop push button, 1
4 is the push button for starting cooking, DREG is the display register, TD
M is time data memory, PREG is program memory,
DBG is a buffer register, and DR■ is a drive circuit.

Claims (1)

[Scope of utility model registration request] In a cooker equipped with an electronic memory in which a cooking time of three or more steps and its output can be programmed, a digital time display 3 for displaying the cooking time and a cooking time setting provided near the digital time display 3 are provided. push button 4,
5.6, output selection push buttons 8, 9, 10.11, and output selection push buttons 8, 9゜10.11 Display the output of all steps set independently for each step. A step display 7 in which a number of display parts equal to the total number of programmable steps multiplied by the number of output types that can be selected for the purpose of cooking are arranged in order in step order, and a push button 14 for starting cooking; The time display 3 and the push buttons 4, 5.6 for setting the cooking time are arranged in one group, and the step display 7 and the push buttons 8, 9, 10.11 for output selection are arranged in another group on the panel. The control panel of the Le Cooker is characterized by its placement.