JP4211587B2 - Induction cooker with touch keys - Google Patents

Description

The present invention relates to an electromagnetic cooker provided with a touch key provided on a flat panel portion of various devices, particularly devices having a flat panel such as an electromagnetic cooker .

  Conventionally, this type of touch key has been proposed, for example, as shown in FIGS. 7 and 8 (see, for example, Patent Document 1). FIG. 7 is a side view of the touch key. Reference numeral 1 denotes a flat electrical insulating panel portion such as glass. Reference numerals 22 and 23 denote electrode portions provided at positions facing the panel portion 1, and the electrode portions 22 and 23 and the panel portion 1 form capacitors. The oscillating unit 4 generates a high-frequency voltage, applies the high-frequency voltage to the electrode unit 23 through the contact electrode unit 18 in contact with the electrode unit 23, and when the electrode unit 22 is touched with a finger 6, the high-frequency voltage is applied to the electrode unit 23 and the panel. By bypassing through the unit 1, the electrode unit 22, and the finger 6, the detection unit 5 detects that the voltage appearing at the electrode unit 23 is lower than the voltage when the finger is not touched, and detects that the electrode unit 22 has been touched. Is.

FIG. 8 is an example in which touch keys are applied to an electromagnetic cooker, and is a view seen from the upper surface of the panel unit. Reference numeral 1 denotes a panel portion made of glass or the like, and 24, 25, 26, 27, 28, and 29 are front side electrodes of a plurality of touch keys provided on the panel portion 1. The touch keys 24, 25, and 26 are assigned functions such as increasing the set temperature of the pan holder 16, turning the power on / off, and decreasing the set temperature. Similarly, the touch keys 27, 28, and 29 are assigned functions such as raising the set temperature of the pan holder 17, turning the power on / off, and lowering the set temperature. The pan holders 16 and 17 are used for placing a pan here, causing an eddy current to flow from a coil section (not shown) below the panel section 1 to heat the pan, and cooking the food in the pan. Thus, by providing a touch key on the panel surface, it can be operated while looking at the food, which makes it very easy to use.
Japanese Utility Model Publication No. 57-106152

  However, with such a configuration, when water is spilled on the panel part or juice is spilled from a heating pan, water or juice may adhere to the operation unit or the display unit and cause malfunction. there were.

The present invention solves the above-described conventional problems. When a frame is short-circuited with water or the like by spilling water or the like, the high-frequency voltage from the oscillation unit is bypassed to the frame from the electrode part of the touch key. Therefore, it is assumed that the touch is considered to prevent malfunction .

In order to solve the above problems, an electromagnetic cooker equipped with a touch key according to the present invention includes a panel unit made of an electrical insulator, a pan placing unit for placing and heating a pan on the panel unit, and the panel unit. A metal frame surrounding the periphery; an electrode portion having a front side electrode provided on the front side of the panel portion; and a back side electrode provided opposite to the front side electrode and provided on the back side of the panel portion; and a voltage of a predetermined frequency on the back side An oscillating unit to be applied to the electrode, a detecting unit for detecting an output voltage of the electrode unit, and a touch key unit for operating the front side electrode, wherein the electrode unit arranged on the front side of the panel unit is the panel The conductive linear part arranged on the front side of the part is connected, and the linear part surrounds the pan rest part and the touch key part and is configured to be installed along the frame. Malfunction when wet in the operation unit or display unit It is disposed so as to surround a portion, by which a linear portion and a frame configured to emit or alarm to stop the operation to short-circuit with water, spilled water or the like with any of the operation touch key frames with water or the like When a short circuit occurs, touch the electrode part of the touch key with water before touching the line part, bypass the high-frequency voltage through the line part from the front electrode, and issue an alarm or stop the operation. This is to prevent malfunctions .

According to the onset bright, spilled water or the like is a high frequency voltage is bypassed from the oscillation portion in the frame than the electrode of the touch key, prevents malfunction regarded as touched, to stop the operation or an alarm or Thus, an electromagnetic cooker that can ensure safety is provided .

The invention according to claim 1 is a panel unit made of an electrical insulator, a pan holder for placing and heating a pan on the panel unit, a metal frame surrounding the panel unit, and the panel An electrode part having a front side electrode provided on the front side and a back side electrode provided opposite to the front side electrode and provided on the back side of the panel part; an oscillation part for applying a voltage of a predetermined frequency to the back side electrode; and A detection unit that detects an output voltage; and a touch key unit that operates the front electrode. The electrode unit is connected to a conductive linear unit disposed on a front side of the panel unit, and the linear unit is The pan is placed along the frame surrounding the pan holder and the touch key unit, and when the linear part and the frame are short-circuited with water, the operation is stopped or an alarm is generated. Detecting touch of a foreign object It is those that can.

In addition, the linear part is installed along the frame surrounding the pan holder and the touch key part, and when the linear part and the frame are short-circuited with water, the operation is stopped or an alarm is issued. When a frame is short-circuited with water, etc., when any of the touch keys are spilled, the high-frequency voltage is bypassed from the front electrode through the linear part before the water touches the electrode part of the touch key. Thus, it is possible to prevent an erroneous operation by issuing an alarm or stopping the operation and assuming that the touch has been made .

Also, the linear portion, the outer periphery of the panel portion is placed along the outer periphery, since was installed configuration surrounding the periphery of the panel portion, the panel portion in dogs and cats, small animals such as mice to ride It can be detected.

Further, since using the data Tchiki electromagnetic cooker, erroneous detection of the touch panel can be prevented, it is possible to provide an excellent easy-to-use induction cooker safety.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
This embodiment will be described with reference to FIGS. FIG. 1 is a side view of the touch key of the present invention, and FIG. 2 is a plan view of the touch key of the present invention as viewed from above. Reference numeral 1 denotes a panel portion made of an electrical insulator such as glass or plastic, and has a front side electrode 2 on the surface of the panel portion 1 and a back side electrode 3 on the back surface to form an electrode portion. The front-side electrode 2 is an electrode part for touching, and has a linear part 7 made of a conductor having a small electric resistance. The front-side electrode 2, the panel unit 1, and the back-side electrode 3 constitute a capacitor C 1, and a high-frequency voltage from the oscillation unit 4 is applied to the back-side electrode 3 via the contact electrode 6. This high-frequency voltage is detected by the detection unit 5, and when the front-side electrode 2 is not touched, a high voltage is detected. Low voltage is detected because it is bypassed. If this voltage difference is greater than or equal to a predetermined value, it is determined that the touch has been made. Further, since the conductive electrode 7 is provided on the front electrode 2, the high frequency voltage from the oscillation unit 4 is bypassed through the capacitor C 1, the line 7, and the touched person, regardless of where the line 7 is touched. Touch can be detected. Therefore, by extending the linear portion 7 for a long time, the touch can be detected no matter where the linear portion 7 is touched, and thus a touch key can be formed over a long region.

(Embodiment 2)
A second embodiment of the present invention is shown in FIG. Reference numeral 11 denotes an apparatus having an operation unit 9 such as a switch such as an electromagnetic cooker and a display unit 10 such as a liquid crystal. If the operation unit 9 and the display unit 10 are wet with water or the like, it may cause malfunction or destruction, and the operation unit 9 and the display unit 10 do not want to be wet. Reference numeral 8 denotes a conductive linear portion connected to the front side electrode 2 and surrounds the operation portion 9 and the display portion 10. Therefore, when water or the like flows into the linear portion 8 and comes into contact with the linear portion 8, the high-frequency voltage is bypassed through the front electrode 2, the linear portion 8, water, etc. Judgment. If it is possible to detect that water or the like has been attached to the linear portion 8, processing after detection is easy, such as issuing an alarm or stopping the operation with a buzzer or light emitting diode before the operation portion 9 or the display portion 10 gets wet. is there.

(Embodiment 3)
A third embodiment of the present invention is shown in FIG. Reference numeral 12 denotes an apparatus having the flat panel 1 such as an electromagnetic cooker. 13 is a touch key that detects when a person touches and raises or lowers the set temperature, or turns the power on and off.
Corresponding to 8, there are 6 touch keys, 3 in total. Reference numeral 2 denotes a front-side electrode having a conductive linear portion 14, and this conductive linear portion 14 is provided so as to surround a touch key portion 13 operated by a person. Reference numeral 16 denotes a metal frame surrounding the periphery of an electromagnetic cooker or the like. The operation of the above configuration will be described. When a frame such as water 19 is spilled and any of the operation touch keys 13 is short-circuited by the water 19, the high frequency voltage from the oscillation unit is bypassed to the frame 16 from the electrode part of the touch key. Therefore, it operates as if it were touched. In order to prevent this, before water or the like touches the electrode portion 13 of the touch key, it is brought into contact with the linear portion 14, the high frequency voltage is bypassed from the front electrode 2 through the linear portion 14, an alarm is issued, and the operation is stopped. It's what makes it happen. Further, even when water or broth spills from the pan placed on the pan placing portion 17 or 18 and approaches the touch key portion 13, the linear portion 14 can be contacted and detected.

(Embodiment 4)
A fourth embodiment of the present invention is shown in FIG. In this embodiment, the conductive linear part 15 is installed around the panel part 1, and when a small animal such as a cat or a mouse enters the panel part 1, the linear part 15 is touched to detect the invasion of the small animal. Is something that can be done. Further, when water spills on the panel part or water flows from the outside and enters the panel part 1, the water can be detected by touching the linear part 15.

(Embodiment 5)
A fifth embodiment of the present invention is shown in FIG. In this embodiment, portions 20a, 20b, and 20c that are touched by a person are provided on the conductive linear portion 19. By touching these 20a, 20b, and 20c, the high frequency voltage is bypassed through the front electrode 2, and the touch is detected. By comprising in this way, the apparatus which can be easily operated not only from the front side of apparatuses, such as an electromagnetic cooker, but from the back side or one side can be provided.

  As described above, by using this touch key in an electromagnetic cooker, an electromagnetic cooker that is safe and easy to use in the home can be provided.

The side view of the touch key in Example 1 of this invention The top view of the electrode part seen from the upper surface of the panel part of the touch key in Example 1 of this invention Outline drawing of touch key in embodiment 2 of the present invention Outline drawing of touch key in Embodiment 3 of the present invention The top view of the electrode part seen from the upper surface of the panel part of the touch key in Example 4 of this invention The top view of the electrode part seen from the upper surface of the panel part of the touch key in Example 5 of this invention Side view of a conventional touch key The figure which shows the prior art example which used the touch key for the electromagnetic cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel part 2 Front side electrode 3 Back side electrode 22, 23, 24, 25, 26, 27, 28, 29 Electrode part 4 Oscillation part 5 Detection part 7, 8, 14, 15, 19 Linear part 9 Operation part 10 Display part 13 Touch key part
16 frames
17, 18 Pot holder 20a, 20b, 20c, 20d Touch part 11, 12 Electromagnetic cooker

Claims (1)

A panel portion made of an electrical insulator, a pan rest portion for placing and heating a pan on the panel portion, a metal frame surrounding the periphery of the panel portion, and a front electrode provided on the front side of the panel portion An electrode unit having a back side electrode facing the front side electrode and provided on the back side of the panel unit; an oscillation unit for applying a voltage of a predetermined frequency to the back side electrode; and a detection unit for detecting an output voltage of the electrode unit; A touch key part for operating the front electrode, and the electrode part is connected to a conductive linear part arranged on the front side of the panel part, and the linear part includes the pan holder part and the touch part. An electromagnetic cooker provided with a touch key that surrounds a key portion and is installed along the frame, and is configured to stop operation or issue an alarm when the linear portion and the frame are short-circuited with water .

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