JP2011096493A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make position setting of a touch input part and a detection electrode easy, and prevent thermal effect on an output part of a touch detection signal. <P>SOLUTION: On the upper face of the top plate 16, the touch input part 22A is formed, and an electrode substrate 26 is deployed downward. This electrode substrate 26 has: the detection electrode 28A in order to detect human contact with the touch input part 22A; a wiring part 28Ah of which one end part is conducted to this detection electrode 28A; and the output part 28Ae to output an electric signal (touch detection signal) detected by the detection electrode 28A conducted to the other end part of this wiring part 28Ah. Then, a gap G is formed between the output part 28Ae in the electrode substrate 26 and the lower face of the top plate 16, and the detection electrode 28A in the electrode substrate 26 is closely stuck to the lower face of the top plate 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cooking device including a touch input unit on a top plate.

  2. Description of the Related Art Conventionally, in a heating cooker, for example, there is one disclosed in Patent Document 1 as a touch input unit provided on a top plate. In Patent Document 1, a touch input unit is formed on the top surface of a top plate, and a detection electrode is formed below the top plate. In order to process the electrical signal (capacitance change) detected by the detection electrode, a detection circuit board is provided in a substantially horizontal state below the top plate, and a connection conductor plate is provided on the detection circuit board. The conductor plate is erected almost vertically, and the upper end of the conductor plate is in direct contact with the detection electrode to be electrically connected.

Japanese Patent Laying-Open No. 2005-38739 (FIG. 7)

  In the above-mentioned Patent Document 1, since the detection electrode itself is configured to be directly connected to the connecting conductor plate, the position of the detection electrode, and thus the position of the touch input portion that forms a pair with the detection electrode, is determined by the conductor plate and the detection circuit. There is a problem that the arrangement position of the substrate is limited and the degree of freedom in the arrangement design of the touch input unit and the detection electrode is low. For example, in consideration of the operability and safety of the touch input unit, it is difficult to form a touch input unit and an electrode on the front end of the top plate that is easy to reach by fingers and far from the heating unit. It is a fact.

  As a countermeasure, an electrode substrate is formed by separating the detection electrode and the output portion, and further, a connection wiring portion for connecting the detection electrode and the output portion is formed, and the electrical signal (touch detection) detected by the detection electrode is formed. The signal is output from the output unit via the connection wiring unit. This electrode substrate is disposed on the lower surface of the top plate.

With this configuration, the installation position of the detection electrode and thus the touch input unit can be positioned in front of the top plate far from the heating unit, and the output unit is limited to a position near the control unit (behind the touch input unit). It becomes possible to set without being. That is, the degree of freedom in setting the position of the output unit is also increased.
However, in this case, when the pan placed on the top plate is, for example, a large tempura pan, the heat spreads to the output part, and the connection part with the circuit board for detection deteriorates due to thermal deterioration. There is a risk of coming.

  The present invention has been made in view of the above circumstances, and is to provide a cooking device in which the position of the touch input unit and the detection electrode can be easily set, and the influence of heat on the output unit of the touch detection signal can be prevented. is there.

  According to the first aspect of the present invention, there is provided a cooker body provided with a top plate in an opening on the upper surface and a heating means below the top plate, and formed on the upper surface of the top plate, and heating the heating means. A touch input unit for setting conditions and the like; a detection electrode disposed below the top plate for detecting a human body contact with the touch input unit; and a wiring unit through which one end of the detection electrode is electrically connected A flexible electrode substrate having an output portion that is electrically connected to the other end portion of the wiring portion and outputs an electric signal detected by the detection electrode, and the output portion portion and the top plate of the electrode substrate A feature is that a gap is formed between the lower surface and the detection electrode portion of the electrode substrate is brought into close contact with the lower surface of the top plate.

  According to the first aspect of the present invention, a detection electrode for detecting a human body contact with the touch input portion is formed on an electrode substrate disposed below the top plate, and an electric signal (so-called touch detection) detected by the detection electrode is formed. Signal) is output from the electrode substrate via the wiring portion, so that the detection electrode can be provided at a position suitable for human body contact detection, and the output portion can be provided at a position such as a detection circuit board. It can be provided at the combined position. And since a space | gap is formed between the output part part in an electrode substrate, and a top plate, a heat influence, such as a cooking pot, does not reach an output part.

By the way, when the above-mentioned gap is formed, if the gap extends between the detection electrode portion and the top plate in the electrode substrate or a minute gap is formed between them, the touch detection accuracy is lowered. It will end up.
In this respect, in the first aspect of the invention, the detection electrode portion of the electrode substrate is in close contact with the lower surface of the top plate, so that the touch detection accuracy is not lowered.

  According to the present invention, the position of the touch input unit and the detection electrode can be easily set, the thermal influence on the output unit of the touch detection signal can be prevented, and further the touch detection accuracy can be prevented from being lowered.

1 is a longitudinal side view showing a configuration from a top plate tip to an output portion according to the first embodiment of the present invention. Longitudinal side view schematically showing the configuration from the top plate tip to the main circuit board Vertical side view showing the output section and main circuit board A perspective view showing the cooking device incorporated in the top plate Top view with the top plate omitted Top view of the touch input part on the top plate Plan view showing part of the electrode substrate FIG. 1 equivalent diagram showing a second embodiment of the present invention 3 equivalent figure

  Hereinafter, a first embodiment in which the present invention is applied to a cooking device incorporated in a system kitchen will be described with reference to FIGS. FIG. 4 shows an external perspective view in a state where the cooking device 2 is incorporated in the top plate 1 of the system kitchen. FIG. 5 is a plan view of the cooker body 3 shown with the top plate removed. The cooker body 3 of the heating cooker 2 is assembled in a state of being dropped into an opening 4 provided on the top plate 1, and a flange portion 3 b is formed at the opening edge of the cooker body 3. The part 3b is disposed on the upper surface of the edge of the opening 4. Further, a roaster portion 5 is provided at the lower portion of the cooker body 3.

  As shown in FIG. 5, the cooker body 3 has an open top surface, two induction heating coils 8 and 9 serving as heating means are provided on the front side of the inside, and another heating is provided at the center back. As a means, for example, a heater 10 made of a radiant heater is provided. In addition, a main circuit board 11 is disposed in the cooker main body 3 via a main circuit board holder 11a (see FIG. 2). As shown in FIG. 5, a large number of light emitting diodes 12 for displaying heating intensity are mounted, and a display 13 (see FIG. 5) made of, for example, a fluorescent display tube is mounted. Further, a detection circuit board 14 (described later) is arranged on the inner surface of the opening 3a of the cooker body 3 as shown in FIGS.

As shown in FIG. 3, a light shielding plate 12A in which a specific display shape 12a is cut out is provided above the light emitting diode 12 (in the direction of the top plate 16).
As shown in FIGS. 1 and 2, a support plate 15 that supports the top plate 16 is provided at the peripheral edge of the opening 3 a of the cooker body 3, and this support plate 15 also includes an electrode substrate 26 to be described later. It also serves as a supporting member to support. A raised portion 15b is formed slightly rearward (rightward in FIGS. 1 and 2) of the one end portion 15a of the support plate 15, and the plate portion 15c portion behind the raised portion 15b is gradually lowered rearward. Inclined, and a vertical plate portion 15d is formed in a suspended state at the rear end portion of the plate portion 15c.

  Packings 29 and 29 are attached to the lower surface and the tip of the one end portion 15 a of the support plate 15. And it is being fixed to the top plate 16 with the adhesive agent 30 filled between the upper surface of this one end part 15a and the said top plate 16. FIG. The support plate 15 is arranged on the opening flange portion 3b of the cooker body 3, and is fixed to the cooker body 3 with screws 15e. Thereby, as shown in FIGS. 1 and 2, the top plate 16 covers the opening 3a on the upper surface of the cooker body 3, that is, covers the induction heating coils 8 and 9 and the heater 10 from above. It is provided as follows.

In this case, the peripheral edge portion 16 a of the top plate 16 is supported by the raised portion 15 b of the support plate 15. In the top plate 16, as shown in FIG. 4, the portions corresponding to the upper portions of the left and right induction heating coils 8 and 9 and the heater 10 are circular heating portions 17, 18, and 19, respectively. The internal regions of the display units 17a, 18a, and 19a correspond to the heating units 17, 18, and 19, respectively.
In the top plate 16, heating intensity display portions 20 </ b> A and 20 </ b> B (see FIG. 6) corresponding to the light emitting diodes 12 are formed on the front side of the heating portions 17 and 18.

  Further, on the upper surface of the front edge portion of the top plate 16, as shown in FIG. 6, the touch input unit 21A for setting the heating intensity of the induction heating coil 8 located on the front left side of the heating unit 17, a single touch. Input units 22A to 25A are provided. Further, a heating input setting touch input unit 21B for the induction heating coil 9 and single touch input units 22B to 25B are provided on the right front side of the heating unit 18. The heating intensity setting touch input units 21A and 21B have basically the same configuration, and the single touch input units 22A to 25A and 22b to 25B have basically the same configuration. The input unit 21A and the single touch input units 22A to 25A will be described.

The heating intensity setting touch input unit 21A is formed of a printed film on the top plate 16 in a form having a contact area with a length that can arbitrarily change the contact position of a finger, that is, in a long form. The single touch input portions 22A to 25A are also formed on the top plate 16 by a printed film.
The single touch input unit 22A is a heating input selecting touch input unit, and is used to select the induction heating coil 8 as an induction heating coil to be used and to turn on / off the power.

  The single touch input unit 23A is a menu setting touch input unit, and is used to set the heating mode by the induction heating coil 8 to a heating mode such as tempura and stew other than “normal heating”. The single touch input unit 24 </ b> A is for setting a cooking time for heating by the induction heating coil 8. The single touch input unit 25A is used for selection and cancellation of settings.

  The single touch input units 22A to 25A and 22B to 25B are arranged at the front center of the top plate 16, and the touch input for setting the heating intensity is provided on both sides of the single touch input units 22A to 25A and 22B to 25B. This is a form in which the portions 21A and 21B are arranged. The single touch input units 22A to 25A and 22B to 25B are symmetrically arranged.

The touch input units 21A, 21B, 22A to 25A, and 22B to 25B as described above are collectively referred to as a touch input unit group T.
Further, as shown in FIGS. 1 and 3, a light transmission film 33 is integrally formed on the entire lower surface of the top plate body 16. The light transmission film 33 is made of, for example, silicon (Si) or germanium (Ge) with a thickness of about 1 micron by sputtering or vacuum deposition, and is translucent.
Further, as shown in FIG. 3, a light shielding film 34 is formed on the entire lower surface of the light transmission film 33 except for the display portions 20A and 20B. A light transmitting portion 34a corresponding to the display portions 20A and 20B is shown in FIG.

  Below the top plate 16, an electrode substrate 26 composed of a double-sided substrate is provided. The electrode substrate 26 is made of an epoxy resin with a glass filler and has a thickness of about 0.8 [mm] and has flexibility. The heat resistant temperature of the electrode substrate 26 is approximately 120 ° C. As shown in FIGS. 6 and 7, a plurality of detection electrodes 27A, a plurality of detection electrodes 27B, 28A to 31A, and 28B to 31B are formed on the upper surface of the electrode substrate 26 by a conductor pattern.

  Among these, the plurality of detection electrodes 27 </ b> A are formed at predetermined intervals corresponding to the heating intensity setting touch input unit 21 </ b> A. In addition, the plurality of detection electrodes 27B are formed at predetermined intervals corresponding to the heating intensity setting touch input unit 21B. The detection electrodes 28A to 31A correspond to the touch input units 22A to 25A, respectively, and the detection electrodes 28B to 31B correspond to the touch input units 22B to 25B, respectively.

  As shown in FIGS. 1, 2, and 7, wiring portions 28 </ b> Ah to 31 </ b> Ah and 28 </ b> Bh to 31 </ b> Bh made of a conductor pattern are connected to the detection electrodes 28 </ b> A to 31 </ b> A and 28 </ b> B to 31 </ b> B. Since 31Ah and 28Bh to 31Bh have basically the same configuration, the wiring portion 28Ah will be described as a representative. As shown in FIG. 7, the wiring portion 28Ah has a through hole 28Ah1 formed from the detection electrode 28A to the lower surface. The lower wiring portion 28Ah2 is configured. FIG. 1 shows the detection electrode 28A, and the formation region of the detection electrode 28A is denoted by reference numeral Rd.

And the termination | terminus part of this wiring part 28Ah is the output part 28Ae.
Note that the wiring portions 27Ah corresponding to the plurality of detection electrodes 27A are similarly derived from the detection electrodes 27A at both ends, as shown in FIG. Further, the wiring portions 27Bh corresponding to the plurality of detection electrodes 27B are similarly derived from the detection electrodes 27B at both ends in the detection electrode 27B group.

  The output sections 27Ae, 27Be, 28Ae-31Ae, 28Be-31Be (hereinafter referred to as output section group E) of the wiring sections 27Ah, 27Bh, 28Ah-31Ah, 28Bh-31Bh (hereinafter referred to as wiring section group H) are It is not provided on the back surface of the top plate 16 and is separated from the top plate 16. And this output part group E is arrange | positioned substantially at one place, and is conductively connected to the terminal 32b group of the external connector 32 (refer FIG. 1, FIG. 3) by soldering. In this case, this soldering is performed by placing so-called cream solder between the output portion group E and each terminal 32b group of the external connector 32 and heating. The external connector 32 is configured by providing a group of terminals 32b on a connector case 32a by molding. The connector case 32a is made of a nylon resin containing glass filler and has a heat resistant temperature of about 80 ° C. The reason why the heat-resistant temperature is low in this way is that when the resin connector case 32a is molded, the resin melting temperature cannot be increased too much in order to increase the dimensional accuracy.

The general names of the detection electrodes 27A, 27B, 28A to 31A, and 28B to 31B are hereinafter referred to as detection electrode group D.
The external connector 32 is composed of a board-to-board type connector, and a board edge connector of the detection circuit board 14 is connected to the external connector 32, and the detection circuit board 14 is connected to the top plate 1 and the induction heating. Between the coils 8 and 9, it is in a vertical state. The detection circuit board 14 is provided with a circuit to be described later, and is further provided with another connector 35. One end of a harness connector 36 is connected to the connector 35, and the other end of the harness connector 36 is connected to the main circuit board 11.

  Here, in the top plate 16, the detection electrode group D portion of the electrode substrate 26 is in close contact with the lower surface of the top plate 16 (the lower surface of the light shielding film 34), for example, by adhesion, and the electrode substrate 26 A spacer 37 is interposed, for example, by bonding between the output portion group E portion and the lower surface of the top plate 16, and the spacer 37 creates a gap G between the output portion group E portion and the lower surface of the top plate 16. Forming.

  A sheet-like insulator 38 is interposed in the detection electrode group D portion on the lower surface of the electrode substrate 26. The insulator 38 is made of polyester and has a heat resistant temperature of approximately 120 ° C. A wedge member 39 is inserted and bonded between the rear portion (wiring portion group H) on the lower surface of the electrode substrate 26 and the support plate 15. The wedge member 39 has a thickness of 0.2 to 0.3 [mm] (in the drawing, the inclined state of the support plate 15 is exaggerated and is drawn thickly), for example, polyimide. Even if it is thin, the strength as a wedge can be obtained. The heat resistant temperature of this polyimide is approximately 220 ° C.

  A contact detection circuit is mounted on the detection circuit board 14, and when a user's hand / finger touches one of the touch input unit groups T, the human body and the corresponding detection electrode are electrostatically coupled, thereby A change in capacitance is detected to detect a touch input by the user.

  In the above configuration, the reason why the support plate 15 is inclined is as follows. When attaching the electrode substrate 26 and the support plate 15 to the top plate 16, first, the electrode substrate 26 is bonded to the back surface of the top plate 16. At this time, the spacer 37 is also bonded (a gap G is formed). In this case, the electrode substrate 26 is flexibly deformed into an inclined form in which the rear end side is separated from the top plate 16. In this state, the support plate 15 is disposed on the back surface of the top plate 16, and the raised portion of the support plate 15 is filled with the adhesive 30 between the one end portion 15 a of the support plate 15 and the back surface of the top plate 16. The 15b portion is pressed and bonded to the back surface of the top plate 16 with a jig (not shown). At this time, if the support plate 15 is parallel to the top plate 16, the rear portion of the support plate 15 may press and damage the electrode substrate 26.

  In the present embodiment in consideration of this point, the rear portion of the support plate 15 is inclined to prevent the rear portion of the support plate 15 from excessively pressing the electrode substrate 26, thereby Damage to the substrate 26 is prevented.

After that, the support plate 15 is screwed to the cooker main body 3 and the wedge member 39 is inserted, whereby the electrode substrate 26 can be more closely attached to the top plate 16.
The operation of the above configuration will be described. For example, when the user wants to cook using the induction heating coil 8, his / her finger is brought into contact with the single touch input unit 22 </ b> A. Since the detection electrode 28A corresponding to the touch input unit 22A flows to the ground side through capacitive coupling by the human body, the user's touch input corresponding to the single touch input unit 22A is detected, and a control circuit (not shown) The induction heating coil 8 is selected by the above.

  For example, when the user sets a heating intensity, for example, when a finger is brought into contact with an appropriate part of the heating intensity setting touch input unit 21A, the detection electrode 27A corresponding to the contact part is connected through capacitive coupling by the human body. Since a current flows to the ground side, a touch input at the contact position of the user's finger is detected, and a setting intensity of the heating intensity corresponding to the contact position is set. A control circuit (not shown) turns on the light emitting diode 12 corresponding to the set heating intensity and controls the induction heating coil 8 so as to achieve the set heating intensity.

  According to the present embodiment described above, the detection electrode group D for detecting the human body contact with the touch input unit group T is formed on the electrode substrate 26 disposed below the top plate 16, and the detection electrode group D Since the output unit group E for outputting the detected electrical signal from the electrode substrate 26 via the wiring unit group H is provided, the detection electrode group D can be formed at a position suitable for human body contact detection. The output unit group E can be provided at a position matching the detection circuit board 14 or the like.

  And since the space | gap G is formed between the output part group E part and the top plate 16 in the electrode substrate 26, the heat influences, such as a cooking pot, do not reach this output part group E part. For example, in tempura cooking, the pan temperature rises to about 200 ° C. If the size of the pan is large or the mounting position is slightly forward, the heat is transferred to the output section E part. Although there is a possibility of spreading, according to the present embodiment, the output unit group E does not become a high temperature. As a result, the external connector 32 is not thermally deformed and the reliability of electrical connection is not reduced.

  That is, the external connector 32 is solder-connected to the output portion group E, but the connector case 32a has a heat-resistant temperature of about 80 ° C. to ensure dimensional accuracy as described above. However, in the present embodiment, this is not the case. Further, it is possible to prevent heat from affecting the soldered portion with the external connector 32.

  Here, since the heat resistance temperature of the external connector 32 connected to the output unit group E is lower than the heat resistance temperature of the electrode substrate 26, high manufacturing accuracy of the external connector 32 can be obtained. There is concern about thermal degradation of the external connector 32. However, according to this embodiment, the thermal effect on the external connector 32 can be avoided by the gap G, and thermal degradation can be prevented.

  In addition, according to the present embodiment, the electrode substrate 26 is composed of a double-sided substrate, the detection electrode group D is formed on the upper surface of the electrode substrate 26, and the output unit group E is provided on the lower surface of the electrode substrate 26. Since the part group H has a through hole (only the through hole 28Ah1 is shown in FIG. 1) and is electrically connected to the detection electrode group D and the output part group E, the electrical property of the detection electrode group D on the upper surface of the electrode substrate 26 is obtained. The signal can be guided well to the output unit group E on the lower surface of the electrode substrate 26.

  According to the present embodiment, since the support plate 15 that supports the electrode substrate 26 is inclined downward toward the output unit group E, the support plate 15 can be prevented from excessively pressing the electrode substrate 26. The damage to the electrode substrate 26 can be prevented.

Further, according to this embodiment, since the wedge member 39 is inserted between the electrode substrate 26 and the support plate 15, the electrode substrate 26 can be more closely attached to the top plate 16.
In addition, according to the present embodiment, since the light transmission film 33 is formed on the substantially entire back surface of the top plate 16 from a semiconductor, the display portions 20A and 20B can be improved while being insulated, and the display plate 20A is particularly configured from a semiconductor. Thus, the metallic luster can be produced and the appearance is further improved. The light transmission film may be another insulator.

  FIGS. 8 and 9 show a second embodiment of the present invention. In this second embodiment, the back surface of the top plate 16 is substantially excluding the touch input portion facing portion (detecting electrode facing portion) Rz. A light transmission film 41 made of a conductive material having a metallic luster is formed on the entire surface, and an insulating film 42 is formed on the touch input portion facing portion Rz. In this case, the light transmission film 41 is made of a titanium thin film. According to this, the appearance of the top plate 16 is further excellent in gloss.

  In addition, this invention is not limited to the said embodiment, It can implement by changing variously. For example, although the spacer 37 is provided for forming the gap G, the electrode substrate 26 itself may be formed obliquely. The external connector 32 may not be a board-to-board type connector.

  In the drawings, 1 is a top plate, 2 is a heating cooker, 3 is a cooker body, 8 and 9 are induction heating coils (heating means), 10 is a heater (heating means), 14 is a detection circuit board, and 16 is a top plate. , 21A, 21B are heating intensity setting touch input units (touch input units), 22A-25A, 22B-25B are single touch input units (touch input units), 26 are electrode substrates, 27A, 27B, 28A-31A, 28B to 31B are detection electrodes, 27Ah, 27Bh, 28Ah to 31Ah, 28Bh to 31Bh are wiring portions, 27Ae, 27Be, 28Ae to 31Ae, 28Be to 31Be are output portions, 32 is a connector, 37 is a spacer, 38 is an insulator, Reference numeral 39 denotes a wedge member, and G denotes a gap.

Claims (7)

A cooker body with a top plate at the top opening and a heating means below the top plate;
A touch input unit formed on the top surface of the top plate, for setting the heating conditions of the heating means,
A detection electrode that is disposed below the top plate and detects a human body contact with the touch input unit, a wiring unit that is electrically connected to the detection electrode and one end, and a conductive unit that is electrically connected to the other end of the wiring unit. A flexible electrode substrate having an output unit that outputs an electrical signal detected by the detection electrode;
A heating cooker, wherein a gap is formed between the output portion portion of the electrode substrate and the lower surface of the top plate, and the detection electrode portion of the electrode substrate is brought into close contact with the lower surface of the top plate.   2. The cooking device according to claim 1, wherein an external connector is connected to the output unit, and the external connector has a heat resistant temperature lower than that of the electrode substrate.   The electrode substrate is composed of a double-sided substrate, the detection electrode is formed on the upper surface of the electrode substrate, the output portion is provided on the lower surface of the electrode substrate, and the wiring portion has a through hole and the detection electrode The cooking device according to claim 1, wherein the heating cooking device is configured to conduct electricity to the output unit.   The cooking device according to any one of claims 1 to 3, wherein the electrode substrate is supported by a support member, and the support member is inclined downward toward the output unit.   The cooking device according to claim 4, wherein a wedge member is inserted between the electrode substrate and the support member.   2. The display device according to claim 1, wherein a display portion is provided on the top surface of the top plate in addition to the touch input portion, and a light transmission film made of a semiconductor or an insulator is formed on almost the entire back surface of the top plate. The cooking device according to any one of 5.   A display unit is provided on the top surface of the top plate in addition to the touch input unit, and a light transmission film made of a conductive material having a metallic luster on the entire back surface of the top plate except for the touch input unit facing part. The heating cooker according to any one of claims 1 to 5, wherein the cooking device is formed.

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