COOKING DEVICE
First Claim
1. A cooking device comprising:
- a main body serving as housing;
a top plate provided on an upper surface of the main body;
a heating section operable to heat an object to be heated;
capacitance-type touch switches, each of which includes a key electrode provided on a back surface of the top plate; and
a control unit operable to detect capacitances formed between the key electrodes and a ground, the control unit determining that the key electrode is pushed to input a control command assigned to the pushed key electrode, when detecting, for a time equal to or more than a first predetermined time, that the capacitance of any of the key electrodes is increased by an amount equal to or more than a first predetermined amount based on a value set as a reference capacitance of the key electrodes;
wherein the cooking device further comprises a cancel electrode located near the key electrodes and between a position at which the heating section is placed and a position at which the key electrodes are placed,the control unit detects a capacitance formed between the cancel electrode and the ground,when the control unit continuously detects, for a time equal to or more than a second predetermined time but less than a third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than a second predetermined amount based on a value set as a reference capacitance of the cancel electrode, the control unit prohibits execution of a control command assigned to a key electrode even if determining that the key electrodes is pushed, andwhen the control unit continuously detects, for a time equal to or more than the third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than the second predetermined amount from the reference capacitance of the cancel electrode, the control unit executes a control command assigned to a key electrode if determining that the key electrode is pushed.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a cooking device capable of preventing heating operations from being unintentionally turned on and off and the setting of heating operations from being changed even when water droplets are scattered around touch switches or the vicinity of the touch switches is wiped with a damp cloth or the like. Left and right cancel electrodes (5a, 5b) are provided near the key electrodes between the positions of left and right heating coils (3a, 3b) and the positions of the key electrodes (4a1, 4a2, 4a3, 4b1, 4b2, 4b3). A control unit (6) changes over between validity and invalidity of inputting through the key electrodes based on whether or not a change of capacitances of the left and right cancel electrodes (5a, 5b) is equal to or more than a predetermined amount.
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Citations
14 Claims
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1. A cooking device comprising:
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a main body serving as housing; a top plate provided on an upper surface of the main body; a heating section operable to heat an object to be heated; capacitance-type touch switches, each of which includes a key electrode provided on a back surface of the top plate; and a control unit operable to detect capacitances formed between the key electrodes and a ground, the control unit determining that the key electrode is pushed to input a control command assigned to the pushed key electrode, when detecting, for a time equal to or more than a first predetermined time, that the capacitance of any of the key electrodes is increased by an amount equal to or more than a first predetermined amount based on a value set as a reference capacitance of the key electrodes; wherein the cooking device further comprises a cancel electrode located near the key electrodes and between a position at which the heating section is placed and a position at which the key electrodes are placed, the control unit detects a capacitance formed between the cancel electrode and the ground, when the control unit continuously detects, for a time equal to or more than a second predetermined time but less than a third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than a second predetermined amount based on a value set as a reference capacitance of the cancel electrode, the control unit prohibits execution of a control command assigned to a key electrode even if determining that the key electrodes is pushed, and when the control unit continuously detects, for a time equal to or more than the third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than the second predetermined amount from the reference capacitance of the cancel electrode, the control unit executes a control command assigned to a key electrode if determining that the key electrode is pushed. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. A cooking device comprising:
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a main body serving as shell; a top plate provided on an upper surface of the main body; a heating section operable to heat an object to be heated; capacitance-type touch switches, each of which includes a key electrode provided on a back surface of the top plate; and a control unit operable to detect capacitances formed between the key electrodes and a ground, the control unit determining that the key electrode is pushed to execute a control command assigned to the pushed key electrode, when detecting, for a time equal to or more than a first predetermined time, that the capacitance of any of the key electrodes is increased by an amount equal to or more than a first predetermined amount based on a value set as a reference capacitance of the key electrodes; wherein the cooking device further comprises a cancel electrode located near the key electrodes and between a position at which the heating section is placed and a position at which the key electrodes are placed; the control unit detects a capacitance formed between the cancel electrode and the ground, when the control unit continuously detects, for a time equal to or more than a second predetermined time but less than a third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than a second predetermined amount based on a reference capacitance of the cancel electrode, the control unit prohibits execution of a control command assigned to a key electrode even if determining that the key electrodes is pushed, and when the control unit continuously detects, for a time equal to or more than the third predetermined time, that the capacitance of the cancel electrode is increased by an amount equal to or more than the second predetermined amount based on the value set as the reference capacitance of the cancel electrode, the control unit replaces the reference capacitance of the cancel electrode with the currently-detected capacitance of the cancel electrode and executes a control command assigned to a key electrode when determining that the key electrodes is pushed. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification