JP5223774B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker in which key electrodes are provided on the same surface as a top plate and operated by touch input.

  Conventionally, this type of cooking device is provided with an ambient state detection means in the vicinity of the operation unit, and when an object is placed on the ambient state detection unit, the operation unit input is prohibited and the unheated state is set. A cooking device is disclosed (for example, see Patent Document 1).

JP 2006-207843 A

  However, in the conventional configuration, when the ambient state detection means detects, it is always in a non-heated state, for example, when water droplets are scattered during heating or when the vicinity of the switch is wiped with a wet cloth, the heating operation is turned off unintentionally. There is a possibility that.

  In the present invention, a touch switch operated by the user and a cancel electrode are provided around the touch switch, and when the cancel electrode is pressed, the switch input of the operation touch switch is invalidated so that water droplets are generated in the vicinity of the touch switch. A user-friendly heating cooker that does not unintentionally turn on or off the heating operation or change the heating operation setting even when it is scattered or when the touch switch is cleaned with a wet cloth. The purpose is to provide.

In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a main body constituting an outer shell, a top plate provided on an upper surface of the main body, heating means for heating an object to be heated, and the top A key electrode that is a capacitive touch switch that is provided on the plate and inputs a control command when touched with a finger, a cancel electrode provided in the vicinity of the key electrode, and a static electrode of the cancel electrode portion. When the change in capacitance is less than a predetermined amount or less than a first predetermined time, and the change in capacitance of the key electrode continuously exceeds a predetermined amount for a second predetermined time longer than the first predetermined time, in which case the change in capacitance of the cancel electrode and the key electrode occur simultaneously by an enable input from the key electrode was a control means so as the cancel electrode is effective That.

  Further, the control means invalidates at least the operation of turning off the heating when the change in the capacitance of the cancel electrode portion is a predetermined amount or more.

  As a result, even when the key electrode, that is, the touch switch operation unit is wiped and wiped from the periphery to the switch unit with a wet cloth, the operation based on an unintended key operation, for example, heating on / off, etc., is not transferred and is convenient. During heating, in particular, the frequency of occurrence of water droplets and splattered food is high, and it is easy to use because it can be cleaned around the switch while maintaining the cooking state despite being a touch switch. Especially in equipment with automatic cooking functions such as automatic rice cooking, unintentional heating off when heating etc. leads to discarded food, and the effect of suppressing heating off malfunction by cancel electrode is large.

  The cooking device of the present invention is provided with a cancel electrode around the key electrode which is a touch switch part, and determines whether the touch switch was pressed by cleaning such as wiping, or whether the user intentionally operated the switch, Usability can be improved by disabling key operations if not intentional.

The block diagram of the heating cooker in Embodiment 1-4 of this invention Switch configuration diagram of the cooking device according to the first embodiment of the present invention The figure which shows the switch detection operation example at the time of care in Embodiment 1 of this invention The figure which shows the switch detection operation example at the time of water adhesion in Embodiment 1 of this invention The figure which shows the switch detection operation example at the time of the object mounting on the cancellation electrode in Embodiment 2 of this invention The figure which shows the switch detection operation example at the time of the object mounting on the cancellation electrode in Embodiment 3 of this invention Switch configuration diagram of heating cooker in Embodiment 4 of the present invention Configuration diagram of cancel electrode in the first to fourth embodiments of the present invention Configuration diagram of cancel electrode in the first to fourth embodiments of the present invention

In order to solve the above-mentioned conventional problems, a first invention is provided in a main body constituting an outer shell, a top plate provided on an upper surface of the main body, a heating means for heating an object to be heated, and the top plate. A key electrode that is a capacitive touch switch that inputs a control command when touched by a finger, a cancel electrode provided in the vicinity of the key electrode, and a change in the capacitance of the cancel electrode portion by a predetermined amount Less than or less than a first predetermined time, and when the change in capacitance of the key electrode continues for a second predetermined time longer than the first predetermined time and exceeds a predetermined amount, the input from the key electrode is If a change in the capacitance of the cancel electrode and the key electrode occur simultaneously by an active with a control means so as the cancel electrode is effective, data It is possible to accurately detect the peripheral state of the key electrode, which is a switch, and to easily identify the actual switch operation from the case where the touch switch is cared for due to water, food adhering or wet cloth, etc. It is easy to use because it can prevent the operating state from being changed without the intention of the user. In addition, since the first predetermined time that is the detection time of the cancel electrode is set shorter than the second predetermined time that is the detection time of the key electrode, the key electrode becomes effective first when wiping around the key electrode. Can be prevented, unintended key reception can be suppressed, and it is easy to use.

  The second invention particularly disables the control means of the first invention to disable the operation to turn off heating at least when the change in the capacitance of the cancel electrode portion continues for a first predetermined time or more and exceeds a predetermined amount. By doing so, it is possible to prevent erroneous switch detection in the case of cleaning due to water around the touch switch, adhesion of cooked food, wet cloth, etc., which is easy to use. During heating, in particular, the frequency of occurrence of water droplets and splattered food is high, and it is easy to use because it can be cleaned around the switch while maintaining the cooking state despite being a touch switch. Especially in equipment with automatic cooking functions such as automatic rice cooking, unintentional heating off when heating etc. leads to discarded food, and the effect of suppressing heating off malfunction by cancel electrode is large.

The third aspect of the invention relates to the control means of the first aspect of the invention, particularly when the cancel electrode detects a change in capacitance of a predetermined amount continuously for a first predetermined time or more and less than a third predetermined time. If the cancel electrode detects a change in the capacitance of a predetermined amount continuously for the third predetermined time or longer, the input from the key electrode is enabled to perform maintenance such as with a wet cloth. It is possible to discriminate between the operation of touching around the key electrode for a relatively short time and the placement of the user around the intentional key electrode such as food and seasonings. By disabling the input, it is easy to use, and even if food, seasonings, etc. are intentionally placed around the switch operation part, that is, in the cancel electrode part, the key operation can be performed and the usage environment is accurate. Detect Because ease of use is good.

  In the fourth aspect of the invention, in particular, the control means of the first aspect of the invention is configured to calculate a difference between a reference detection level when no object is placed on the cancel electrode and a current detection level of the cancel electrode input in time series. Acts as a predetermined amount of capacitance change, forcing the current detection level when the cancel electrode detects a predetermined amount of capacitance change for more than the first predetermined time and less than the third predetermined time By switching to the standard detection level automatically, contact operation around the key electrode for a relatively short time, such as cleaning with a wet cloth, etc., and intentional key electrode around the cooked product, seasoning, etc. by the user It is easy to use by disabling the switch operation, that is, the input from the key electrode, and cooking and seasonings are intentionally around the switch operation part, that is, the cancel electrode part. Even placed, it is possible to perform key operation, a good usability for detecting the use environment accurately. In addition, when the cancel electrode is pressed for more than a specified time, such as when the food or seasoning is placed, the state around the touch switch is again detected by the cancel electrode using the state where the food or seasoning is placed as the reference state. Therefore, even in the state where a cooked product, seasoning, or the like is placed, it is possible to determine whether or not the operation is a touch operation around the key electrode for a relatively short time, such as cleaning with a wet cloth.

  In the fifth aspect of the invention, in particular, the cancel electrode of any one of the first to fourth aspects of the invention is arranged between the heating means and the key electrode arrangement position, so that the user can use a pan or the like to be heated. Even if a swing operation or the like is performed and the touch switch is shifted, an unintended operation is not shifted and the usability is good. In addition, unintended input of the key electrode is predominantly caused by splashing or water droplets of the heated object from the heating means arrangement location, and the arrangement between the heating means and the key electrode arrangement position depends on the use environment of the equipment, the equipment It is the best in view of the features of the above, and by not spreading the cancel electrode unnecessarily, it is possible to prevent malfunctions that the user does not accept keys at the time of operation due to external noise or adhesion of food. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

  In particular, the sixth invention has a plurality of key electrodes for inputting a control command to the heating means of any one of the first to fourth inventions, and the cancel electrode is provided on each of the four sides surrounding the plurality of key electrodes. By arranging it for various malfunction factors such as pan operation by a user such as a pan to be heated, splashing and water droplets at the time of heating, dripping water around the key electrode when cleaning the device It is effective and easy to use.

  The seventh invention has a plurality of key electrodes for inputting a control command to the heating means in any one of the first to fourth inventions, and the cancel electrode has four sides surrounding the plurality of key electrodes. Among them, by disposing on the three sides excluding the front side, which is the user's operation direction, when the user operates the key electrode, the user accidentally touches the cancel electrode, and a malfunction that the key cannot be operated can be performed.

  In an eighth aspect of the invention, in particular, in any one of the first to fourth aspects of the present invention, the heating device has a plurality of key electrodes for inputting a control command, and the cancel electrode is formed of four sides surrounding the plurality of key electrodes. By arranging it on the two sides of the left side and the right side, there is a high possibility that dust will be removed from around the key electrodes arranged in a row during normal wiping, and even if the cancel electrode is arranged only on the left side and the right side, the malfunction is suppressed. The effect is high. In addition, since the arrangement of the cancel electrode around the key electrode is reduced, the key electrode itself can be made larger, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is easy to use. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

The ninth invention has a plurality of key electrodes for inputting a control command to the heating means in any one of the first to eighth inventions, and when a plurality of inputs from the key electrodes are generated simultaneously, the key By disabling input from the electrodes, malfunctions can be suppressed without providing cancel electrodes between the key electrodes, which is convenient. In addition, when a plurality of SWs are arranged side by side, for example, for wiping cleaning from the front side or the rear side, the key is highly likely to detect input simultaneously, and even with the arrangement of the cancel electrode only on the left side and the right side, An effect equivalent to that of arranging cancel electrodes on the four sides around the key electrode can be obtained. In addition, since the number of cancel electrodes can be reduced, the key electrode itself can be made large, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, by reducing the number of cancel electrodes, the structure is simplified and the cost is reduced.

  In a tenth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, when an input from the key electrode is invalidated by the cancel electrode, a notification means for notifying the fact by sound or light is provided. By doing this, the user can be informed of the situation around the touch switch, and there is an effect of promoting the removal of adhesion of water, the removal of the objects placed around the touch switch, and the like.

  In an eleventh aspect of the invention, in particular, in any one of the first to fifth aspects, a key electrode or a cancel electrode is configured by a copper foil pattern of a printed wiring board, and the printed wiring board is disposed immediately below the top plate. This eliminates the need for a conductive member that electrically connects the top plate printing and the control unit, thereby reducing the cost.

(Embodiment 1)
FIG. 1 shows a configuration diagram of a heating cooker according to the first embodiment of the present invention. As shown in FIG. 1, a top plate 2 is provided on the upper surface of a main body 1 constituting the outer shell, and a heated object mounted on the top plate 2 is heated, so that the lower part of the top plate 2 on the left side of the main body is heated. A left heating coil 3a as a means and a right heating coil 3b as a heating means are provided below the top plate 2 on the right side of the main body. The left heating coil 3a and the right heating coil 3b inductively heat an object to be heated above the heating coil by causing a high frequency current to flow through the coil and generating a magnetic field. Further, on the substantially same surface as the top plate 2, there are a left heating off / on switch 4a3 and a right heating off / on switch 4b3 which are key electrodes for controlling heating on / off, and key electrodes for adjusting the heating output. A left down switch 4a1, a left up switch 4a2, a right down switch 4b1, and a right up switch 4b2 are provided. Immediately before (back) each switch is a notification means for displaying the operating state and setting state of the left and right heating means. A left liquid crystal display device 7a and a right liquid crystal display device 7b are provided. Furthermore, on the substantially same plane as the top plate 2, a left cancel electrode 5a between the position immediately above the left heating coil 3a and the left switch group key of 4a1, 4a2, 4a3 and in the vicinity of the left switch group, A right cancel electrode 5b is arranged between a position immediately above the right heating coil 3b and the right switch group key of 4b1, 4b2, 4b3 and in the vicinity of the right switch group. Here, each switch and the cancel electrode described above are capacitive touch switches.

  On the front side of the main body, a power switch 8 for turning on / off the main power supply of the device is arranged. Below the top plate 2, a left heating off / on switch 4a3, a left down switch 4a1, a left up switch 4a2, and a left cancel electrode 5a A signal is input, a signal is output to the left heating coil 3a and the left liquid crystal display device 5a, and further, a signal is input from the right heating off / on switch 4b3, right down switch 4b1, right up switch 4b2, and right cancel electrode 5b. 3a and a control means 6 for outputting a signal to the right liquid crystal display device 7a.

  Here, in this embodiment, the heating coil, the heating off / on switch, the up switch, the down switch, the liquid crystal display device, and the cancel electrode are provided independently on the left and right, respectively, and the above-described components are the left block. Since the same operation is performed in units of the right block, the description of the right block is omitted and the description of the left block is substituted.

  The cooking device having the configuration of FIG. 1 will be described below with reference to the drawings.

  FIG. 2 shows a detailed configuration of the left switch and a switch detection signal. Each switch has a conductive key electrode on the lower surface of the top plate (top plate) 2 and an insulator (here, glass and The capacitor has a dielectric structure in which the upper portion of the electrode of the top plate 2 is a dielectric.

  When a human finger touches the upper surface of the top plate 2 facing the key electrode of each switch, the electric charge stored in the capacitor structure described above is discharged to the ground through the human body and the capacitance of the human body is combined. As a result, the switch detection voltage varies from v1 to v2 as shown in FIG. When the cancel electrode is in the non-accepting state, each switch is accepted by the control means 6 when the fluctuation voltage exceeding the preset switch detection voltage Vθ is a preset switch detection time t1θ (here, 0.1 second). Enabled) when input continuously. When a person touches the left heating off / on switch 4a, the signal is input to the control means 6, and the control means 6 controls heating on / off of the left heating coil 3a and displays the operating state of the left liquid crystal display device 7a.

  The initial values of Vb1 and V1 are set when the power switch 8 is turned on.

  When a person touches the left down switch 4a1 and the left up switch 4a2, the signal is inputted to the control means 6, and the heating means of the left heating coil 3a is increased or decreased by the action of the control means 6. At that time, the operation state of the left liquid crystal display device 7a is also displayed.

  As shown in FIG. 2, the left cancel electrode 5a has a conductive cancel electrode on the lower surface of the top plate 2 in the same manner as each switch, and is formed of an insulator (here, glass). The capacitor structure has a dielectric immediately above the electrode. When viewed from the top surface of the top plate 2, the cancel electrode is disposed between the left heating coil 3a and each key electrode and surrounds the core key electrode. Since the left cancel electrode 5a has a capacitor configuration like each switch, the left cancel electrode has high conductivity on the top surface of the top plate 2 facing the cancel electrode as shown in FIG. When an object having a relatively large electrostatic capacity with respect to the ground, for example, an object such as a dust cloth wetted with water or a seasoning in a PET bottle is mounted, the cancel electrode detection voltage changes from vb1 to vb2. In order to receive the cancel electrode, the control means 6 continuously inputs a fluctuation voltage exceeding the preset switch detection voltage Vbθ for a preset cancel electrode detection time tb1θ (here 0.05 sec). It is valid when When an object is mounted on the left cancel electrode, the signal is input to the control means 6, and even if a variable voltage exceeding Vθ continues to t1θ by the action of the control means 6, the input operation of each switch is performed. To disable. By performing the above-mentioned operation, the switch operation can be invalidated in the case of cleaning with water around the touch switch, adhesion of food or wet cloth, etc., and the operation is not intended by the user. It is possible to prevent the state from changing and it is easy to use.

  Further, since the left cancel electrode 5a for detecting the peripheral state is provided between the left heating coil 3a and the left key electrodes 4a1, 4a2, 4a3, the user can use a pot or the like to be heated. Even if a swing operation or the like is performed and the touch switch unit is shifted, detection is performed in the same manner as the above-described operation based on the voltage variation of the cancel electrode caused by the pan.

FIG. 3 shows the detection operation when the switch part is cleaned with a wet cloth in this embodiment. As shown in the figure, when the heating off / on switch is wiped with a wet cloth from the right lateral position to the left, first, the detection voltage of the cancel electrode fluctuates from vb1 to vb2, and the fluctuation occurs at the first predetermined time. If it continues for a certain electrode detection time tb1θ (here 0.05 seconds), it is determined that the cancel electrode is on. Since the wetting dust is moved from left to right, following the change of the cancel electrode, it fluctuates in the order of heating off / on switch, up switch, down switch, and the fluctuation range continues over t1θ over Vθ. ing. In the present embodiment, when the cancel electrode is valid, the input operation is invalidated even if a change that continues for more than t1θ at Vθ or more is detected. When the cancel electrode is invalid, t1θ at or above Vθ of each switch. Since the input operation is made effective in response to the continuous fluctuations as described above, the problem of unintentionally accepting the switch when cleaning a wet cloth or the like can be solved. Since the validity / invalidity of each switch operation is switched in the state of the cancel electrode, each switch operation can be performed at a desired detection level when there is no object around each switch.

  As described above, according to the present embodiment, it is possible to easily identify the actual switch operation from the case of care due to adhesion of a cooked item, wet cloth, etc., and the operating state is not intended by the user. It is easy to use because it can be prevented from changing.

  In the present embodiment, since the cancel electrode detection time tb1θ is set to be shorter than the switch detection time t1θ, there is a possibility that the switch is detected first when cleaning the adhered food or the wet cloth. It can be further suppressed and is easy to use.

  In this embodiment, since the cancel electrode is provided between the heating coil and the key electrode, the user performs a panning operation etc. of the pan that is the object to be heated, and the pan is moved to the touch switch unit. In this case, as in the case of cleaning with a wet cloth in FIG. 3, each switch detects an operation after the cancel electrode is activated, and each switch input can be invalidated. Therefore, an unintended operation transition does not occur even in a panning operation or the like, and the usability is further improved.

Next, FIG. 4 shows a detection operation when water adheres to the switch unit in the present embodiment. As shown in the figure, when water adheres immediately above the heating off / on switch and the cancel electrode, the cancel electrode becomes effective when the level fluctuates by more than Vbθ and by t b 1θ or more, and the heating off / on switch becomes more than Vθ almost simultaneously. The fluctuation continues for t1θ or more. In the present embodiment, when the cancel electrode is valid, the input operation of the heating off / on switch is invalid, so that it is possible to prevent the heating operation from being unintentionally turned off due to, for example, spilling water spray during heating. It is easy to use. Since the validity / invalidity of each switch operation is switched in the state of the cancel electrode, each switch operation can be performed at a desired detection level when there is no object around each switch.

  During heating, in particular, the frequency of occurrence of water droplets and splattered food is high. Especially in equipment with an automatic cooking function such as automatic rice cooking, unintentional heating off when performing heating etc. Leads to discarded food, and the effect of suppressing malfunction of heating off by the cancel electrode is great.

  In the present embodiment, since the cancel electrode detection time tb1θ is set to be shorter than the switch detection time t1θ, there is a possibility that the switch is detected first when cleaning the adhered food or the wet cloth. It can be further suppressed and is easy to use.

  In this embodiment, the change in the capacitance of the key electrode and the cancel electrode has been described by the detection method using the divided voltage using the high frequency voltage as the power source. However, the change in the capacitance is performed using the high frequency voltage as the power source. Even if it is a pulse count method obtained through the same, the same effect can be obtained.

  In the present embodiment, the heating unit is described as induction heating. However, even if the heating unit is electric heating, radial heater heating, or gas heating, the same effect can be obtained.

  In addition, the liquid crystal display device, which is a notification means, also has a function to display when the key electrode is invalid due to the action of the cancel electrode, so that the user can be informed of the situation around the touch switch. This has the effect of promoting the removal of water adhesion and the removal of objects placed around the touch switch.

  Further, in the present embodiment, the configuration of the cancel electrode has been described as a configuration provided between the heating coil and the key electrode and between each key electrode. However, as shown in FIG. Even if it is set as the structure provided in this, since the same effect is acquired, since it is the structure which does not provide a cancellation electrode between each key electrode, each key electrode can be enlarged and it leads to the improvement of usability.

  Furthermore, as shown in FIG. 8 (b), the cancel electrode is arranged on each of the four sides surrounding the plurality of key electrodes, so that a user, such as a pan as a heated object, performs a panning operation and splashes during heating. It is effective and easy to use against various malfunction factors such as water droplets, water dripping around the key electrode when cleaning the equipment.

  Furthermore, as shown in FIG. 9C, the cancel electrodes are arranged on three sides excluding the front side that is the user's operation direction among the four sides surrounding the plurality of key electrodes. When the key electrode is operated, the user mistakenly touches the cancel electrode, and a malfunction that cannot be performed by the key operation can be performed.

  Furthermore, as shown in FIG. 9D, cancel electrodes are arranged on the left and right sides of the four sides surrounding the plurality of key electrodes, and around a plurality of arranged key electrodes during normal wiping and cleaning. Therefore, the effect of suppressing malfunction is high even when the cancel electrodes are arranged only on the left and right sides.

  Since the number of cancel electrodes arranged around the key electrode is reduced, the key electrode itself can be made larger, and a display element or the like that informs the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

  Although not specifically mentioned in the present embodiment, when a plurality of inputs from the key electrodes are generated at the same time, a cancel electrode is provided between the key electrodes if the action of invalidating the input from the key electrode is maintained. It is easy to use and can prevent malfunction.

  In addition, when a plurality of SWs are arranged side by side, for example, for wiping cleaning from the front side or the rear side, the key is highly likely to detect input simultaneously, and even with the arrangement of the cancel electrode only on the left side and the right side, An effect equivalent to that of arranging cancel electrodes on the four sides around the key electrode can be obtained.

  In addition, since the number of cancel electrodes can be reduced, the key electrode itself can be made large, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, by reducing the number of cancel electrodes, the structure is simplified and the cost is reduced.

(Embodiment 2)
FIG. 1: shows the block diagram of the heating cooker in the 2nd Embodiment of this invention. Since the configuration diagram is the same as that of the first embodiment, the description thereof is omitted. In the present embodiment, while the cancel electrode is continuously turned on for the first predetermined time t b1 (here 0.05 seconds) or more and less than the second predetermined time t b2 (here 5 seconds), Disables the input of each switch, and disables the input of each switch while the cancel electrode is continuously turned on for a second predetermined time t b2 (here, 5 seconds). In the present embodiment, the greatest feature is that the input operation of each switch is switched between valid and invalid depending on the on-detection time of the cancel electrode. As shown in FIG. 5, a seasoning in a container or the like is placed on the cancel electrode. In this case, it is possible to prevent each switch from being invalidated continuously. When the state changes for a relatively short period of time, such as cleaning with a wet cloth, the switches are disabled, and long-term state changes such as placing seasonings on the cancel electrode and water adhering to the single position of the cancel electrode Since each switch is enabled at the time of maintenance, it is possible to prevent erroneous reception during maintenance, and to solve problems such as placing an object around the switch or being unable to operate the switch when water adheres, making it ideal for the use environment Easy to use because switch operation is realized.

  In the present embodiment, since the cancel electrode detection time tb1θ is set to be shorter than the switch detection time t1θ, there is a possibility that the switch is detected first when cleaning the adhered food or the wet cloth. It can be further suppressed and is easy to use.

  In this embodiment, since the cancel electrode is provided between the heating coil and the key electrode, the user performs a panning operation etc. of the pan, which is the object to be heated, and shifts to the touch switch unit. As in the case of cleaning with a wet cloth in FIG. 3, each switch detects an operation after the cancel electrode is activated, and each switch input can be invalidated. Even in pan operation and the like, unintended movements do not occur and it is even easier to use.

  In this embodiment, the change in the capacitance of the key electrode and the cancel electrode has been described by the detection method using the divided voltage using the high frequency voltage as the power source. However, the change in the capacitance is performed using the high frequency voltage as the power source. Even if it is a pulse count method obtained through the same, the same effect can be obtained.

  In the present embodiment, the heating unit has been described as induction heating, but the same effect can be obtained even if the heating unit is electrothermal heating, radial heater heating, or gas heating.

  In addition, the liquid crystal display device, which is a notification means, also has a function to display when the key electrode is invalid due to the action of the cancel electrode, so that the user can be informed of the situation around the touch switch. This has the effect of promoting the removal of water adhesion and the removal of objects placed around the touch switch.

  Further, in the present embodiment, the configuration of the cancel electrode has been described as a configuration provided between the heating coil and the key electrode and between each key electrode. However, as shown in FIG. Even if it is set as the structure provided in this, since the same effect is acquired, since it is the structure which does not provide a cancellation electrode between each key electrode, each key electrode can be enlarged and it leads to the improvement of usability.

  Furthermore, as shown in FIG. 8 (b), the cancel electrode is arranged on each of the four sides surrounding the plurality of key electrodes, so that a user, such as a pan as a heated object, performs a panning operation and splashes during heating. It is effective and easy to use against various malfunction factors such as water droplets, water dripping around the key electrode when cleaning the equipment.

  Furthermore, as shown in FIG. 9C, the cancel electrodes are arranged on three sides excluding the front side that is the user's operation direction among the four sides surrounding the plurality of key electrodes. The user can touch the cancel electrode by mistake when operating the key electrode, and the user can perform a malfunction that cannot be operated by the key.

Furthermore, as shown in FIG. 9D, cancel electrodes are arranged on the left and right sides of the four sides surrounding the plurality of key electrodes, and around a plurality of arranged key electrodes during normal wiping and cleaning. Therefore, the effect of suppressing malfunction is high even when the cancel electrodes are arranged only on the left and right sides.

  Since the number of cancel electrodes arranged around the key electrode is reduced, the key electrode itself can be made larger, and a display element or the like that informs the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

  Although not specifically mentioned in the present embodiment, when a plurality of inputs from the key electrodes are generated at the same time, a cancel electrode is provided between the key electrodes if the action of invalidating the input from the key electrode is maintained. It is easy to use and can prevent malfunction.

  In addition, when a plurality of SWs are arranged side by side, for example, for wiping cleaning from the front side or the rear side, the key is highly likely to detect input simultaneously, and even with the arrangement of the cancel electrode only on the left side and the right side, An effect equivalent to that of arranging cancel electrodes on the four sides around the key electrode can be obtained.

  In addition, since the number of cancel electrodes can be reduced, the key electrode itself can be made large, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, by reducing the number of cancel electrodes, the structure is simplified and the cost is reduced.

(Embodiment 3)
FIG. 1: shows the block diagram of the heating cooker in the 3rd Embodiment of this invention. Since the configuration diagram is the same as that of the first embodiment, the description thereof is omitted. In the present embodiment, the control means statically calculates the difference between the reference detection level (Vb1) when no object is placed on the cancel electrode and the current detection level (Vb2) of the cancel electrode input in time series. It has the effect of setting a predetermined amount of change in capacitance, and the cancel electrode is continuously turned on for a first predetermined time t b1 (here 0.05 seconds) or longer and for a second predetermined time t b2 (here 5 seconds). During this time, the input of each switch is invalidated, and when the cancel electrode is continuously turned on for a second predetermined time t b2 (here, 5 seconds) or more, the current detection level is forcibly replaced with the reference detection level (Vb1 Is the largest feature. As shown in FIG. 6, when a seasoning in a container is placed on the cancel electrode, each switch is prevented from being invalidated continuously. about It can be. The key operation is invalidated for more than the first predetermined time t b1 (here, 0.05 seconds) and less than the second predetermined time t b2 (here, 5 seconds). Easy to use because it prevents input. Further, in the present embodiment, when the cancel electrode is detected to be on for more than a second predetermined time t b2 (here, 5 seconds), the switch detection is not simply invalidated, but the cancel electrode on detection level is set to the reference detection level. When the second predetermined time t b2 (here, 5 seconds) or more has elapsed, the switch operation becomes valid once, and further from Vb2 (the reference detection level when the second predetermined time t b2 or more has elapsed). When the Vbθ level fluctuates, the switch input is invalidated.

As described above, the seasoning is placed on the cancel electrode portion as shown in FIG. 6 by replacing the current detection level with the reference detection level when the second predetermined time t b2 (here, 5 seconds) or more has elapsed. Even under conditions, switch misdetection due to water adhesion can be suppressed, and malfunctions when cleaning a wet cloth etc. can also be suppressed, making it easy to use.

In the present embodiment, since the cancel electrode detection time tb1θ is set to be shorter than the switch detection time t1θ, there is a possibility that the switch will be detected first when cleaning the adhered food or wet cloth. It can be further suppressed and is easy to use.

In addition, when the second predetermined time t b2 (here, 5 seconds) has elapsed, the current detection level is changed to the reference detection level, so that an object cannot be placed around the switch or the switch cannot be operated when water adheres. It can be solved and is easy to use.

  In this embodiment, since the cancel electrode is provided between the heating coil and the key electrode, the user performs a panning operation etc. of the pan, which is the object to be heated, and shifts to the touch switch unit. As in the case of cleaning with a wet cloth in FIG. 3, each switch detects an operation after the cancel electrode is activated, and each switch input can be invalidated. Even in pan operation and the like, unintended movements do not occur and it is even easier to use.

  In this embodiment, the change in the capacitance of the key electrode and the cancel electrode has been described by the detection method using the divided voltage using the high frequency voltage as the power source. However, the change in the capacitance is performed using the high frequency voltage as the power source. Even if it is a pulse count method obtained through the same, the same effect can be obtained.

  In the present embodiment, the heating unit has been described as induction heating, but the same effect can be obtained even if the heating unit is electrothermal heating, radial heater heating, or gas heating.

  In addition, the liquid crystal display device, which is a notification means, also has a function to display when the key electrode is invalid due to the action of the cancel electrode, so that the user can be informed of the situation around the touch switch. This has the effect of promoting the removal of water adhesion and the removal of objects placed around the touch switch.

  Further, in the present embodiment, the configuration of the cancel electrode has been described as a configuration provided between the heating coil and the key electrode and between each key electrode. However, as shown in FIG. Even if it is set as the structure provided in this, since the same effect is acquired, since it is the structure which does not provide a cancellation electrode between each key electrode, each key electrode can be enlarged and it leads to the improvement of usability.

  Furthermore, as shown in FIG. 8 (b), the cancel electrode is arranged on each of the four sides surrounding the plurality of key electrodes, so that a user, such as a pan as a heated object, performs a panning operation and splashes during heating. It is effective and easy to use against various malfunction factors such as water droplets, water dripping around the key electrode when cleaning the equipment.

  Furthermore, as shown in FIG. 9C, the cancel electrodes are arranged on three sides excluding the front side that is the user's operation direction among the four sides surrounding the plurality of key electrodes. When the key electrode is operated, the user mistakenly touches the cancel electrode, and a malfunction that cannot be performed by the key operation can be performed.

  Furthermore, as shown in FIG. 9D, cancel electrodes are arranged on the left and right sides of the four sides surrounding the plurality of key electrodes, and around a plurality of arranged key electrodes during normal wiping and cleaning. Therefore, the effect of suppressing malfunction is high even when the cancel electrodes are arranged only on the left and right sides.

  Since the number of cancel electrodes arranged around the key electrode is reduced, the key electrode itself can be made larger, and a display element or the like that informs the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

  Although not specifically mentioned in the present embodiment, when a plurality of inputs from the key electrodes are generated at the same time, a cancel electrode is provided between the key electrodes if the action of invalidating the input from the key electrode is maintained. It is easy to use and can prevent malfunction.

  In addition, when a plurality of SWs are arranged side by side, for example, for wiping cleaning from the front side or the rear side, the key is highly likely to detect input simultaneously, and even with the arrangement of the cancel electrode only on the left side and the right side, An effect equivalent to that of arranging cancel electrodes on the four sides around the key electrode can be obtained.

  In addition, since the number of cancel electrodes can be reduced, the key electrode itself can be made large, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, by reducing the number of cancel electrodes, the structure is simplified and the cost is reduced.

(Embodiment 4)
FIG. 1: shows the block diagram of the heating cooker in the 4th Embodiment of this invention. Since the configuration diagram is the same as that of the first embodiment, the description thereof is omitted. FIG. 7 illustrates a detailed configuration of the left switch. Each switch is independently provided as a copper foil pattern on the printed wiring board disposed immediately below the top plate, and similarly, the cancel electrode is provided independently as a copper foil pattern on the printed wiring board. Yes. Each switch and cancel electrode has a capacitor configuration with a dielectric immediately above the copper foil pattern of the top plate 2, and the switch operation and electrostatic placement of the object directly above the cancel electrode are caused by the change in capacitance. It is configured to detect a change in capacity. As shown in FIG. 8, for example, a double-sided printed wiring board is used, and a part or all of the control means is arranged on the back surface of the surface on which the electrode pattern is formed, and connection wiring to the left heating coil, the left liquid crystal display device, etc. If the optimization is minimized, an inexpensive configuration is obtained.

  Further, in the present embodiment, the configuration of the cancel electrode has been described as a configuration provided between the heating coil and the key electrode and between each key electrode. However, as shown in FIG. Even if it is set as the structure provided in this, since the same effect is acquired, since it is the structure which does not provide a cancellation electrode between each key electrode, each key electrode can be enlarged and it leads to the improvement of usability.

  Furthermore, as shown in FIG. 8 (b), the cancel electrode is arranged on each of the four sides surrounding the plurality of key electrodes, so that a user, such as a pan as a heated object, performs a panning operation and splashes during heating. It is effective and easy to use against various malfunction factors such as water droplets, water dripping around the key electrode when cleaning the equipment.

  Furthermore, as shown in FIG. 9C, the cancel electrodes are arranged on three sides excluding the front side that is the user's operation direction among the four sides surrounding the plurality of key electrodes. When the key electrode is operated, the user mistakenly touches the cancel electrode, and a malfunction that cannot be performed by the key operation can be performed.

  Furthermore, as shown in FIG. 9D, cancel electrodes are arranged on the left and right sides of the four sides surrounding the plurality of key electrodes, and around a plurality of arranged key electrodes during normal wiping and cleaning. Therefore, the effect of suppressing malfunction is high even when the cancel electrodes are arranged only on the left and right sides.

Since the number of cancel electrodes arranged around the key electrode is reduced, the key electrode itself can be made larger, and a display element or the like that informs the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, the number of cancel electrodes can be reduced, and the structure is simplified and inexpensive.

  Although not specifically mentioned in the present embodiment, when a plurality of inputs from the key electrodes are generated at the same time, a cancel electrode is provided between the key electrodes if the action of invalidating the input from the key electrode is maintained. It is easy to use and can prevent malfunction.

  In addition, when a plurality of SWs are arranged side by side, for example, for wiping cleaning from the front side or the rear side, the key is highly likely to detect input simultaneously, and even with the arrangement of the cancel electrode only on the left side and the right side, An effect equivalent to that of arranging cancel electrodes on the four sides around the key electrode can be obtained.

  In addition, since the number of cancel electrodes can be reduced, the key electrode itself can be made large, and a display element or the like for notifying the operation navigation or the device operation state can be arranged on the top plate, which is convenient. Further, by reducing the number of cancel electrodes, the structure is simplified and the cost is reduced.

  As described above, the heating cooker according to the present invention can switch the switch operation between valid and invalid by changing the surrounding state of the touch switch. It can also be applied to applications.

1 Body 2 Top plate 3a Left heating coil (heating means)
3b Right heating coil (heating means)
4a1 Left down switch (key electrode)
4b1 Right down switch (key electrode)
4a2 Left up switch (key electrode)
4b2 Right up switch (key electrode)
4a3 Left heating off / on switch (key electrode)
4b3 Right heating off / on switch (key electrode)
5a left cancel electrode 5b right cancel electrode 6 control means 7a left liquid crystal display device (notification means)
7b Right liquid crystal display device (notification means)
8 Power switch

Claims (11)

A main body constituting the outer shell, a top plate provided on the upper surface of the main body, a heating means for heating an object to be heated, and a capacitance type provided on the top plate for inputting a control command by touching with a finger A key electrode that is a touch switch; a cancel electrode provided in the vicinity of the key electrode; and a change in the capacitance of the cancel electrode portion continuously for a first predetermined time or more and when the change exceeds a predetermined amount, the key The input from the electrode is invalidated, the change in capacitance of the cancel electrode portion is less than a predetermined amount or less than a first predetermined time, and the change in capacitance of the key electrode is longer than the first predetermined time. when a second predetermined hours or more continuously for a predetermined amount or more, if the change in capacitance of the cancel electrode and the key electrode occur simultaneously by an enable input from the key electrode Heating cooker having a control means so as the cancel electrode is effective. Wherein, when it becomes more than a predetermined change in the amount of the cancel electrode portions capacitance continues first predetermined time or more, the heating cooker according to claim 1, disabling the operation of the at least heating off . Wherein, when the cancel electrode is and first predetermined time or more consecutive smaller than the third predetermined time to detect a change in capacitance of a predetermined amount is set to disable the input from the key electrode, the cancel electrode 2. The cooking device according to claim 1, wherein when a predetermined amount of change in capacitance is detected continuously for a third predetermined time or more, input from the key electrode is validated. The control means, as the reference detection level and, when the current a predetermined amount of change in capacitance difference detection level of the cancel electrode which is input to the sequence of when an object on the cancel electrode is not placed And when the cancel electrode detects a change in capacitance of a predetermined amount continuously for a first predetermined time or more and less than a third predetermined time, the current detection level is forcibly replaced with a reference detection level. The cooking device according to claim 1, wherein the cooking device is characterized. The cancel electrode is heating cooker according to any one of claims 1 to 4, characterized in that arranged between the key electrode position and the heating means. 5. The apparatus according to claim 1, further comprising: a plurality of key electrodes for inputting a control command to the heating unit, wherein the cancel electrode is disposed on each of four sides surrounding the plurality of key electrodes. The heating cooker described in 1. A plurality of keys electrodes for inputting a control command to the heating means, the cancel electrode, among the four sides surrounding the plurality of keys electrodes, arranged in three sides excluding the edges before an operation direction of the user The cooking device according to any one of claims 1 to 4, wherein the cooking device is a cooking device. A plurality of keys electrodes for inputting a control command to the heating means, claim the cancel electrode, among the four sides surrounding the plurality of keys electrodes, characterized by placing two sides of the left and right sides The heating cooker of any one of 1-4. 9. The apparatus according to claim 1, further comprising a plurality of key electrodes for inputting a control command to the heating unit, wherein the input from the key electrode is invalidated when a plurality of inputs from the key electrode are simultaneously generated. The heating cooker described in 1. When an input from the key electrode is disabled by the cancel electrode, according to claim 1, characterized by comprising an informing means for informing that the sound or light Cooker. Constitute the key electrode or the cancel electrode with copper foil pattern of a printed wiring board, heating according to the printed wiring board in any one of the top plate directly under claim 1 to 5 characterized in that arranged Cooking device.