JPH06290676A - Pulse signal processing device - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the pulse generator is mishandled by mistake, the operation should not be executed due to the mistaken operation. The control circuit (processing means) sets the initial value of the malfunction prevention counter Mc to 3, and when the pulse generator generates the pulse signal Pa once, the counter Mc is decremented by "1". When the operation dial (knob) of the pulse generator is properly operated to generate the pulse signal Pa three times or more, the control circuit executes the processing operation (steps S8 and S9). If the operation dial is touched by mistake, the pulse signal P
Since "a" does not appear three times or more, even if the counter Mc becomes "0", the control circuit returns the counter Mc to "3" after 10 seconds (step S3). Therefore, the processing operation is not executed even if the operation is mistaken again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse signal processing device for performing processing according to the number of pulses generated by a pulse generator.

[0002]

2. Description of the Related Art For example, in a microwave oven, when a desired cooking menu is selected from a plurality of cooking menus and a start operation is performed, heating cooking having contents according to the cooking menu is automatically executed. There is something. In this device, a selection key is provided on the operation panel corresponding to each cooking menu, and a desired cooking menu is selected by pressing any one of the selection keys.

However, in the above-mentioned structure, the number of selection keys increases as the number of cooking menus increases, which causes a problem that the operation panel becomes large. On the other hand, in the method of selecting a desired cooking menu while sequentially moving the displayed cooking menu by reducing the number of operation keys and repeating the pressing operation, the selection operation of the cooking menu becomes troublesome and convenient. There was a problem that became worse.

Therefore, recently, there is a miniaturized one in which the number of operation keys is reduced and the usability is improved, and as an example, a large number of cooking menus are divided into a plurality of cooking menu groups in advance. So that the cooking menu group can be selected by rotating the operation dial of the pulse generator in one direction, and the cooking menu included in the cooking menu group can be selected by rotating it in the other direction. Further, there is a configuration in which when the operation dial is pressed, the start switch is operated to start heating cooking of the selected cooking menu.

Thus, the user can select a desired cooking menu by a simple operation of rotating the operation dial without performing a troublesome operation of repeatedly pressing the operation key. Moreover, since cooking can be started simply by pressing the operation dial, it is excellent in usability.

However, in the above-mentioned device, for example, if the operator's hand or body accidentally touches the operation dial,
The operation dial is rotated or pressed. Then, although the user has no intention of cooking, the cooking menu is selected and the cooking is performed. In order to prevent the occurrence of such a problem, conventionally, an erroneous operation prevention configuration as shown in FIG. 7 has been adopted.

In the erroneous operation prevention structure of FIG. 7, it is premised that the operation dial is slightly rotated due to an erroneous operation and a pulse signal is not generated more than three times. That is, when the control circuit enters the cooking menu selection program, first, the malfunction prevention counter Mc is set to "3" (step S1), and it is in a state of monitoring whether or not the input of the pulse signal Pa is input (step S1). Step S2). In this state, if the operation dial is touched by mistake, the pulse generator generates the pulse signal Pa. Then, the control circuit decrements the malfunction prevention counter by one each time the pulse signal Pa is input (steps S2, 3,).
Repeat 4 or 5, 6). Since the pulse generator does not generate 3 pulses or more by a slight rotation of the operation dial due to an erroneous operation, the malfunction prevention counter Mc does not become "0", and the selection of the cooking menu group (step S7) or cooking is performed. No cooking menu is selected from the menu group (step S8). Therefore, even if the operation dial is pressed in addition to being rotated during the erroneous operation, the cooking is not started because the cooking menu is not selected.

[0008]

However, in the conventional malfunction prevention configuration, the cooking menu is not selected by one malfunction, but the malfunction prevention counter uses the pulse signal at the time of the first malfunction. Since the value is reduced by the number of Pa, the total number of pulse signals generated by the pulse generator may be 3 or more when an erroneous operation occurs again. Then, the control circuit executes step S7 or S8, and if the operation dial is pressed by mistake, heating and cooking will start. When the cooking menu group is selected, the first cooking menu of the cooking menu group is simultaneously selected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform a pulse processing which can prevent a processing operation from being executed by an erroneous operation of picking a pulse generator even if the operation is frequent. To provide the equipment.

[0010]

DISCLOSURE OF THE INVENTION A pulse processing apparatus according to the present invention comprises a pulse generator for generating a number of pulse signals corresponding to the rotation amount of a knob to be rotated, and a pulse signal for the pulse signal generated by the pulse generator. And a processing means for performing a processing operation according to the number, wherein the processing means counts the pulse signals generated by the pulse generator, and executes the processing operation when the count value exceeds a predetermined value, It is characterized in that the count value of the pulse signal is canceled on condition that the pulse generator does not generate the next pulse signal within a fixed time when the value is less than the predetermined value.

[0011]

According to the present invention of the above means, when the number of pulse signals generated by the pulse generator is less than a predetermined value and the pulse generator does not generate the next pulse signal within a fixed time, the processing means is provided. Cancels the count value of the pulse signal, so that even if an erroneous operation is repeated, the processing operation is not executed by the erroneous operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a microwave oven will be described below with reference to FIGS. Figure 2 shows the external appearance of the entire structure.
A heating / cooking chamber 2 is formed therein, and the object to be heated in the heating / cooking chamber 2 is heated and cooked by oscillating the magnetron 3 shown in FIG. Further, during oven cooking or grill cooking, the object to be heated in the cooking chamber 2 is cooked by energizing the oven heater 4 and the grill heater 5 shown in FIG. 6 to generate heat.

On the other hand, a door 6 for opening and closing the heating and cooking chamber 2 is provided on the front surface of the outer box 1, and an operation panel 7 is provided on the right side of the heating and cooking chamber 2. The operation panel 7 is provided with a menu display section 8, which is divided into cooking menu groups 8a, 8b, 8c each displaying a plurality of cooking menus. When the selection of the cooking menu group and the selection of the cooking menu are performed as described below, the menu display unit 8 lights up the selected cooking menu group and the selected cooking menu.

An operation dial 9 is arranged below the menu display section 8. The operation dial 9 functions as a knob for rotating the pulse generator 10 shown in FIG. The pulse generator 10 includes a fixed substrate 11 and a rotating substrate 12 shown in FIG. 3, and an operation dial 9 is attached to a shaft 13 fixed to the rotating substrate 12. When the operation dial 9 is rotated, two kinds of pulse signals Pa and Pb are output from the pulse generator 10. The pulse signals Pa and Pb are control circuits as processing means shown in FIG. 14 to be given.

That is, the fixed substrate 1 of the pulse generator 10
Reference numeral 1 denotes a common electrode 15 connected to a positive side terminal (5 V in this embodiment) of a DC power source (not shown), and a control circuit 1.
First and second pulse electrodes 16 and 17 connected to 4 are provided. Of these, both pulse electrodes 16,
Reference numeral 17 denotes a plurality of salient poles 16a, 17a as shown in FIG.
And the convex poles 16a and 17a are provided so as to be offset from each other. On the other hand, a contact 18 having three contact pieces 18a to 18c is fixed to the rotary substrate 12, the contact piece 18a is constantly in contact with the common electrode 15, and the contact pieces 18b and 18c rotate the rotary board 12. Accordingly, the convex poles 16a and 17a of both pulse electrodes 16 and 17 are intermittently contacted. Therefore, when the rotary substrate 12 is rotated by the operation dial 9, the number of pulses corresponding to the rotation angle is output from both the pulse electrodes 16 and 17.

A start switch 19 composed of a tact switch is provided on the fixed substrate 11 side of the pulse generator 10. When the operation dial 9 is pushed, the start switch 19 is pushed by the rotary substrate 12. It operates and gives a start signal to the control circuit 14.

The above-mentioned control circuit 14 also has a function as a control means for controlling the entire microwave oven, and is constituted by including a microcomputer, a memory, etc., and a program for heating and cooking is stored and set in advance. There is. As shown in FIG. 6, the magnetron 3 described above is connected to the control circuit 14 via the drive circuit 3a, and the oven heater 4 and the grill heater 5 are connected to the control circuit 14 via the drive circuits 4a and 5a, respectively. Further, the control circuit 14 is connected with a weight sensor for detecting the weight of the object to be heated, various sensors 20 such as a gas sensor for detecting the concentration of water vapor or alcohol in the cooking chamber 2, and various switches 21 such as a cancel switch. There is. Then, the control circuit 14 controls the magnetron 3, the oven heater 4 and the grill heater 5 on the basis of the selected cooking menu, the detection signals of the various sensors 20 and the like, and executes the heating and cooking according to the object to be heated. It is like this.

Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG. First, when the cooking menu is selected, the operation dial 9 is rotated rightward to select the cooking menu groups 8a to 8c, and the number of pulse signals Pa and Pb according to the rotation angle is selected. From the pulse generator 10 to the control circuit 14
Entered in. The control circuit 14 controls the operation dial 9 depending on the presence / absence of the pulse signal Pb at the time of inputting the pulse signal Pa.
The rotation direction of is determined (steps S4 and S5).

That is, when the operation dial 9 is rotated to the right, the contact 18 moves in the direction indicated by the arrow M in FIG. 4, so that the first pulse electrode 16 moves as shown in FIG. After outputting the pulse signal Pa, the second electrode 17 outputs the pulse signal Pb with a delay. On the contrary, when the operation dial 9 is rotated counterclockwise, the contact 18 is not
, The second electrode 17 does not output the pulse signal Pb at the time when the first pulse electrode 16 outputs the pulse signal Pa. Therefore, when the pulse signal Pa is input to the control circuit 14 (the input voltage from the first electrode 16 changes from 0V to 5V), the operation is performed depending on whether the pulse signal Pb is input to the control circuit 14 or not. It is possible to determine whether the dial 9 is rotated right or left.

Since the operation dial 9 has now been rotated to the right, the control circuit 14 executes the cooking menu group selection process (step S8) corresponding to the clockwise rotation, and the pulse signal Pa
Each time is input once, the cooking menu groups 8a to 8c are sequentially selected. Here, since the selected cooking menu group is lit and displayed, the user stops the rotation operation of the operation dial 9 when the lit and displayed cooking menu group becomes a desired one.

Next, the operation dial 9 is used to select a desired cooking menu from the selected cooking menu group.
When the is rotated to the left, the control circuit 11 determines the rotating direction in the same manner as described above, and then executes the cooking menu selection process (step S9) corresponding to the left rotation, and the pulse signal Pa is input once. Each time, the cooking menu in the cooking menu group is sequentially selected. Also in this case,
Since the selected cooking menu is lit and displayed, the rotation operation of the operation dial 9 is stopped when the desired cooking menu is lit and displayed.

As described above, one of the cooking menu groups 8a to 8c is selected and set by rotating the operation dial 9 to the right, and the selected cooking menu group is rotated by rotating to the left. Since one of the plurality of cooking menus included in can be selected, as a result, a desired one cooking menu can be selected and set from the plurality of cooking menus by a simple operation.

Then, when the operation dial 9 is pressed to start the heating and cooking in the selected cooking menu, the start switch 19 operates, so that the control circuit 1
In step 1, the cooked food corresponding to the set cooking menu is executed ("YES" in step S11 to return).

Next, the operation when the control dial 14 is erroneously rotated while the control circuit 14 is ready to accept the selection of the cooking menu will be described below. In this embodiment, it is assumed that the rotation angle of the operation dial 9 due to an erroneous operation is small and the number of pulse signals Pa generated by the pulse generator 10 is "3" or less.

When a power plug (not shown) of the microwave oven is connected to an outlet, or when cooking is finished or a cancel operation is performed, the control circuit 14 starts execution of a cooking menu selection program shown in FIG. Then, the control circuit 14 first determines the down counter T in step S1.
Is set to "0" and it is determined "YES" at step S2 to determine whether the next T is "0". At step S3, the malfunction prevention counter Mc is set to "3". Then, the state where the input of the pulse signal Pa from the first pulse electrode 16 of the pulse generator 10 is awaited, in other words, the state where the selection of the cooking menu can be accepted (the repetition of steps S2 to 4) is performed.

In this state, the operation dial 9 is slightly rotated by an erroneous operation, and the pulse signal Pa is output from the pulse generator 10 three times, for example. Then, the control circuit 14 becomes "YES" in step S4, and
The direction of rotation of the operation dial 9 is determined at 5 and the process proceeds to step S6 or 7 depending on the determination result. In steps S6 and S7, it is determined whether or not the malfunction prevention counter Mc is "0". Here, since Mc is "3", steps S6 and S7 are "NO" and step S12. After subtracting "1" from the current value of Mc, step S13 of setting the down counter T to "10" is executed, and the process returns to step S2.

In step S2, it is determined whether or not T is "0". Since the current T is "10", the control circuit 14
Determines "NO" in step S2, and then performs an operation of subtracting "1" from T every 1 second.
After executing, the process proceeds to step S4. Here, when the second pulse signal Pa is input, the control circuit 14
“YES” in the step S4, and the above-mentioned step S
5, 6 or 7 is executed to move to step S12, where the malfunction prevention counter Mc is decremented by "1" from the current value "2", and then the down counter T is set to "10" again in step S13. To do. And step S
When steps 2 and 14 are sequentially executed to move to step S4 and the third pulse signal Pa is input, “YES” is obtained in step S4 and steps S5, 6 or 7, 12, 13, as described above. Are sequentially executed, and thereafter, steps S2 and 1 are performed.
The state where the three steps 4, 4 are repeatedly executed is entered.

At this time, the control circuit 14 decrements the down counter T by "1" in step S14 every 1 second, and when the down counter T becomes "0" in 10 seconds, the control circuit 14 returns "0" in step S2. If "YES", the process proceeds to step S3, where the malfunction prevention counter Mc is reset to "3". After that, the control device 14
The state is such that steps S2 to S4 are repeatedly executed. In this way, the pulse generator 10 is
Generates a pulse signal Pa, and then the pulse generator 10 does not generate a pulse signal Pa for 10 seconds,
Since the count value of the pulse signal Pa up to that point, that is, the subtraction value of the malfunction prevention counter Mc in this embodiment is canceled and returned to the initial setting value "3", thereafter, the operation dial 9 is slightly rotated again by an incorrect operation. However, Mc does not become "0" due to the erroneous operation. Therefore, step S
It becomes "YES" at 6 or 7 and step S8 or 9
Since the process does not shift to the (processing operation), even if the operation dial 9 is pressed by an erroneous operation, the cooking does not start.

Further, in the present embodiment, when the user presses the operation dial 9 after selecting a desired cooking menu and accidentally makes a slight rotation, the incorrect rotation operation causes the cooking menu. I try not to change. That is, when the process of step S8 or 9 is completed, the control circuit 14 determines whether or not the pulse signal Pa is input from the pulse generator 10 three or more times after the process is completed, and the start switch 19 is operated. The step S11 for judging whether or not it has been repeated is repeatedly executed.

When the user selects a desired cooking menu group and then operates the operation dial 9 to select the cooking menu from the cooking menu group, or when the cooking menu is selected again, the pulse is generated. Since the signal Pa is input to the control circuit 14 three or more times, it becomes "YES" in step S11 and returns to step S2, and the cooking menu group selection or the cooking menu selection is performed in step S8 or 9 as described above.

However, when the operation dial 9 is erroneously rotated when it is pressed, the pulse signal Pa is not generated more than three times because the rotation amount is small. Therefore, the control circuit 14 determines "N" in step S10.
O ”,“ YES ”in the step S11 and the process returns and the cooking is executed.
The erroneous rotation of will be ignored and the selected cooking menu will not change.

In the above embodiment, the operation dial 9 operates not only the pulse generator 10 but also the start switch 19, but the start switch 19 may be operated by another key.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and is not limited to, for example, a microwave oven, and pulse processing for performing a predetermined process by a pulse from a pulse generator rotated by a knob. It is widely applicable to general devices.

[0034]

As described above, according to the present invention, when the count value of the number of pulse signals generated by the pulse generator is less than a predetermined value, the pulse generator does not generate the next pulse signal within a certain period of time. In addition, since the pulse count value is canceled, the processing operation can be prevented from being executed due to the erroneous operation of pinching the pulse generator even if the erroneous operation is frequent.

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven.

FIG. 3 is an exploded perspective view of a main part of a pulse generator.

FIG. 4 is a partial development view of electrodes of a pulse generator.

FIG. 5 is a waveform diagram of a pulse signal generated by a pulse generator.

FIG. 6 is a block diagram showing an electrical configuration.

FIG. 7 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

7 is an operation panel, 9 is an operation dial (knob), 10 is a pulse generator, 14 is a control circuit (processing means), 15 is a common electrode, 16 and 17 are first and second pulse electrodes, and 19 is a start switch. Is.

Claims (1)

[Claims] 1. A pulse generator that generates a number of pulse signals according to the amount of rotation of a knob that is rotated, and a processing unit that performs a processing operation according to the number of pulse signals generated by this pulse generator. The processing means counts pulse signals generated by the pulse generator, executes the processing operation when the count value exceeds a predetermined value, and within a certain time when the count value is less than or equal to the predetermined value. A pulse signal processing device that cancels the count value of the pulse signal on the condition that the next pulse signal is not generated.