JP4444260B2 - Touch key and electromagnetic cooker having the same - Google Patents

Description

Present invention relates to an electromagnetic cooker having touch key over that provided in the plate portion constituting the flat panel.

Conventionally, this type of touch key has been proposed, for example, as shown in FIGS. FIG. 8 is a side view of the touch key, and reference numeral 1 denotes a flat electrical insulating plate portion such as glass. Reference numerals 23 and 24 denote electrode portions provided at positions opposite to the plate portion 1, and the electrode portions 23 and 24 and the plate portion 1 form a capacitor. Reference numeral 8 denotes a contact electrode portion that contacts the electrode portion 24 provided on the back side of the plate portion 1 and transmits the signal voltage level to the control circuit portion 5 when the finger 6 touches the front side electrode portion 23 of the plate portion 1. The control circuit unit 5 sends a high frequency voltage to the electrode unit 24, and when the electrode unit 23 is touched with the finger 6, the control circuit unit 5 bypasses the high frequency voltage through the electrode unit 24, the plate unit 1, the electrode unit 23, and the finger 6 and appears on the electrode unit 24. It detects that a voltage falls and detects that the electrode part 23 was touched.

FIG. 9 shows an example in which the touch key is applied to an electromagnetic cooker. 1 is a plate portion made of glass or the like, and 7 is a housing. Reference numeral 25 denotes a front electrode portion of a plurality of touch keys provided on the plate portion 1.

  1a is a pan holder provided in the plate unit 1. A pan is placed here, an eddy current is passed through the coil unit (not shown) under the plate unit 1, and the pan is heated to cook food in the pan. To do.

The present invention provides a stable operation touch that does not malfunction even if the plate portion on the upper side of the auxiliary electrode portion for signal extraction provided separately from the electrode of the touch key is touched, and there is no contact failure even if the installation position of the plate is shifted. An object is to provide an electromagnetic cooker having a key.

In order to solve the above problems, the present invention heats an eddy current flowing through a plate portion made of an electrical insulator and provided with a pan holder and a pan provided under the plate portion and placed in the pan holder. A coil part, an electrode part provided facing the front and back of the plate part, and a high frequency voltage is sent to the back side electrode part provided on the back side of the plate part and is opposed to the back side electrode part and the front side of the plate part A control circuit unit that detects that a voltage of the back side electrode unit is lowered when a finger touches the front side electrode unit provided on the front side electrode unit, and detects that the front side electrode unit is touched; An auxiliary electrode portion connected to the auxiliary electrode portion, and a contact electrode portion that contacts the auxiliary electrode portion and sends the voltage of the back side electrode portion to the control circuit portion, and the auxiliary electrode portion is formed in a narrow strip shape. And the contact electrode portion has the auxiliary power. By being configured in a narrow strip shape having a width which intersects the parts, but also touch the plate portion of the upper portion of the intersection of said contact electrode portion and the auxiliary electrode portions so as not to detect said control circuit unit touches It is.

According to the present invention, there is no malfunction even when touching the plate portion on the upper part of the auxiliary electrode portion for signal extraction provided separately from the back side electrode portion, and stable operation without contact failure even if the installation position of the plate is shifted. An electromagnetic cooker can be provided.

The invention according to claim 1 is a plate portion made of an electrical insulator and provided with a pan holder, and a coil portion that flows by heating an eddy current through the pan provided under the plate portion and placed in the pan holder. And an electrode part provided facing the front and back of the plate part, and a high frequency voltage is sent to the back side electrode part provided on the back side of the plate part and provided on the front side of the plate part facing the back side electrode part. A control circuit unit that detects that a voltage of the back side electrode unit is lowered when a finger touches the front side electrode unit and detects that the front side electrode unit is touched, and is electrically connected to the back side electrode unit An auxiliary electrode portion, and a contact electrode portion that is in contact with the auxiliary electrode portion and sends a voltage of the back side electrode portion to the control circuit portion, and the auxiliary electrode portion is formed in a narrow strip shape, and The contact electrode part intersects with the auxiliary electrode part Narrow configured in strip shape of that width, the even contact with the auxiliary electrode portion of the top of the plate portion of intersection of the contact electrode part so as not to detect said control circuit unit touches treasure panel above the auxiliary electrode portion It is possible to realize a highly reliable electromagnetic cooker that does not malfunction even when touching the part, and that maintains contact between the contact electrode part of the control circuit part and the electrode part of the plate part even if the position of the plate is shifted to some extent.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention and reference embodiments will be described below with reference to the drawings. In addition, the same thing as a prior art example uses the same symbol, and abbreviate | omits description.

( Reference form 1)
This reference embodiment will be described with reference to FIGS. FIG. 1 is a side view of a touch key according to the present invention, and FIG. 2 is a view seen from the back of a plate portion 1, showing an electrode portion 3 and a conductive path portion 4. 2 is an electrode portion provided on the front side of the plate portion 1 made of glass or the like, and can be touched with a finger 6. Reference numeral 3 denotes an electrode portion provided on the back side of the plate portion 1 so as to face the electrode portion 2, and the electrode portion 2, the plate portion 1, and the electrode portion 3 constitute a capacitor. The electrode unit 3 is in contact with the contact electrode unit 8 and sends a signal to the control circuit unit 5 when the electrode unit 2 is touched with a finger 6. 4 is a conductive path portion connected to the electrode portion 3, and has a smaller area per unit length than the electrode portion 3.

  With the above configuration, when the user of the touch key is charged with static electricity, such as wearing a sweater, the charged voltage is discharged to the electrode unit 2 when the charged finger 6 is brought close to the electrode unit 2, and the voltage is This discharges from the electrode part 3 to the metal casing 7 through the conductive path part 4 and does not affect the control circuit part 5. Although the conductive path portion 4 is discharged to the metal casing 7, it may be discharged to an object at another ground potential. Further, by narrowing the width of the conductive path portion 4, when the plate portion 4 a at the top of the conductive path portion 4 is touched with the finger 6, the conductive path portion 4, the plate portion 1, and the finger 6 are configured. The capacitance of the capacitor can be reduced, and even if the portion 4a of the plate portion 1 is touched, it is not detected, and malfunction can be prevented.

( Reference form 2)
A second reference embodiment of the present invention is shown in FIG. FIG. 3 is a view of the plate portion 1 from the back side, and there are three electrode portions 9, 10, 11 provided on the back side. The electrode portions 9, 10, 11 are opposed to each other across the plate portion 1. Each has three electrode parts (not shown), and constitutes three sets of touch keys. A conductive region 12 is provided between the electrode portions 9, 10, 11 and is set to the ground potential. With the above configuration, when the counter electrode on the front side of the electrode unit 9 is touched, the voltage change generated in the electrode 10 on the adjacent side can be reduced, and the touch key that is configured by the electrode 10 is not touched. It can prevent the operation of detecting that

(Embodiment 1 )
Figure 4 shows a first embodiment in FIG. FIG. 4 is a view of the plate portion 1 as viewed from the back, and there is a strip-like auxiliary electrode portion 14 connected to the electrode portion 13 and the electrode portion 13. Reference numeral 15 denotes a strip-shaped contact electrode portion connected to the control circuit portion 5 and intersects the auxiliary electrode portion 14.

  With the above configuration, when the plate portion 14a above the intersection of the auxiliary electrode portion 14 and the contact electrode portion 15 is touched with a finger, the intersection of the auxiliary electrode portion 14 and the contact electrode portion 15, the plate portion 1, and the finger are configured. Further, since the capacitance value of the capacitor is small, the voltage change when touched with a finger is small, and even if the plate portion 14a is touched, it is not recognized that the touch is made, and malfunction can be prevented. Further, since the auxiliary electrode portion 14 is long in a belt shape and the contact electrode portion 15 is also long in a belt shape, even if the installation position of the plate portion 1 is shifted, the contact between the electrode portion 14 and the contact electrode portion 15 is maintained and operates reliably.

  Since the auxiliary electrode unit 14 takes out a signal indicating whether the contact electrode unit 15 connected to the control circuit unit 5 is in contact with the auxiliary electrode unit 14 and touches the front electrode unit 16, the arrangement and control of the electrode unit 16 are controlled. This is necessary for the positional relationship of the circuit unit 5, the positional relationship with the housing 7, and the positional relationship with other obstacles, and increases the degree of freedom of the arrangement of the electrode unit 6 or the control circuit unit 5.

(Embodiment 2 )
FIG. 6 shows a second embodiment of the present invention. In FIG. 6, the auxiliary electrode portion 18 is formed in a strip shape, the area of the auxiliary electrode portion 18 is reduced, and the contact with the contact electrode portion 19 is further ensured.

( Reference form 3 )
FIG. 7 shows a third reference embodiment of the present invention. 20, 21, and 22 are electrode portions provided on the front side of the plate portion 1, 20 is a touch key that controls turning on / off the power, 21 is a touch key that sets a high temperature setting level, and 22 is a low temperature setting level. Touch key to set. When the touch key 20 is touched, the control circuit unit 5 recognizes that the touch key 20 is touched when it touches the touch key 20 continuously for a predetermined time t1, and turns on the power. Further, when the temperature setting level is changed by touching the touch keys 21 and 22, the touch recognition is made when the touch is continuously touched for a predetermined time t2, and t1> t2 is set.

  By adopting the above configuration, it is possible to realize an easy-to-use touch key in which the risk of accidentally turning on the power is reduced and the temperature setting level can be set lightly. In addition, by using this touch key in an electromagnetic cooker, it is possible to provide an electromagnetic cooker that is highly safe and easy to use in the home.

Induction cooker having touch key over according to the present invention as described above, since a stable operation can be applied to the induction cooker having touch key over having a flat panel to the plate portion to configure.

The side view of the touch key in the reference form 1 of this invention The top view of the electrode part seen from the back surface of the plate part of the touch key in the reference form 1 of this invention The top view of the electrode part seen from the back surface of the plate part of the touch key in the reference form 2 of this invention The top view of the electrode part and contact electrode part seen from the plate part back surface of the touch key in Embodiment 1 of this invention Side view of touch key according to Embodiment 1 of the present invention The top view of the electrode part seen from the back surface of the plate part of the touch key in Embodiment 2 of this invention The top view of the electrode part seen from the plate part surface of the touch key in the reference form 3 of this invention Side view of a conventional touch key The perspective view which shows the example which used the touch key for the electromagnetic cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plate part 2, 3, 9, 10, 11, 13, 16, 17, 20, 21, 22, 23, 24, 25 Electrode part 4 Conductive path part 7 Case 12 Conductive area part 14, 18 Auxiliary electrode part 15, 19, 8 Contact electrode part 5 Control circuit part

Claims (1)

A plate portion made of an electrical insulator and provided with a pan holder, a coil portion that is provided under the plate portion and that heats the pan placed in the pan holder and heats it, and is opposed to the front and back of the plate portion The finger touches the front side electrode part provided on the front side of the plate part and the electrode part provided on the front side of the plate part while sending the high frequency voltage to the back side electrode part provided on the back side of the plate part and facing the back side electrode part. A control circuit unit for detecting that the voltage of the back side electrode unit is lowered and touching the front side electrode unit, an auxiliary electrode unit electrically connected to the back side electrode unit, and the auxiliary electrode A contact electrode portion that contacts a portion and sends the voltage of the back side electrode portion to the control circuit portion, the auxiliary electrode portion is formed in a narrow strip shape, and the contact electrode portion is the auxiliary electrode portion Narrow strip shape that intersects It is by the electromagnetic cooker so as not to detect the said control circuit portion to touch the plate portion of the upper portion of the intersection of the contact electrode part and the auxiliary electrode portion touches.

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