CN112087833B - Heating Cooker - Google Patents

Abstract

The present disclosure provides a heating cooker capable of simplifying a structure. The heating cooker is provided with: an insulating operation panel having an operation surface touched by a user; a substrate having an electrode on an upper surface, the substrate being in contact with the operation panel below the operation surface; a resin plate contacting the lower surface of the substrate and supporting the substrate; a spring which is in contact with the lower surface of the resin plate and which applies force upward to the resin plate; and a control unit for calculating the capacitance between the operation surface and the electrode.

Description

Heating Cooker

Technical Field

The present disclosure relates to a heating cooker.

Background Art

In the past, various structures of such heating cookers are known. For example, an induction heating cooker is known that heats an object to be heated, such as food, by induction heating. As a conventional induction heating cooker, for example, an induction heating cooker is known that has an insulating top plate for placing the object to be heated and an electrostatic capacitance touch input unit at the front edge of the top plate (see Patent Document 1).

The heating cooker of Patent Document 1 is provided with an operation display substrate and a holding member in the space below the top plate. The operation display substrate is arranged below the touch input unit and has an input component based on an electrostatic touch key method. The holding member holds the outer periphery of the lower surface of the top plate and fixes the operation display substrate to the top plate.

Prior Art Literature

Patent Literature

Patent Document 1: Japanese Patent No. 5439304

Summary of the invention

Problems to be solved by the invention

However, the heating cooker disclosed in Patent Document 1 requires a holding member for fixing the operation display substrate to the top plate, which makes the structure complicated. There is still room for improvement in simplifying the structure of the heating cooker, including the structure disclosed in Patent Document 1.

Therefore, an object of the present disclosure is to solve the above-mentioned problems and provide a heating cooker with a simplified structure.

Means for solving problems

A heating cooker in one embodiment of the present invention comprises: an insulating operating panel having an operating surface touched by a user; a substrate in contact with the operating panel below the operating surface and having an electrode on the upper surface; a resin plate in contact with the lower surface of the substrate to support the substrate; a spring in contact with the lower surface of the resin plate to apply force upward to the resin plate; and a control unit to calculate the electrostatic capacitance between the operating surface and the electrode.

Effects of the Invention

According to the heating cooker disclosed in the present invention, the structure can be simplified.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a cooking device according to an embodiment.

Fig. 2 is a plan view of the cooking device according to the embodiment.

FIG. 3 is a perspective view of an operation unit in the embodiment.

FIG. 4 is an exploded perspective view of the operation unit in the embodiment.

FIG. 5A is a diagram showing a state in which a protrusion of a resin plate is inserted into a housing portion of a holding member in the embodiment.

5B is a diagram showing a state in which the protrusion of the resin plate in the embodiment is inserted into the housing portion of the holding member.

6 is a plan view showing a state in which a spring is accommodated in a recessed portion of a holding member in the embodiment.

7 is a diagram showing, at the top and bottom, a perspective view of the electrode, the substrate, and the resin plate in the embodiment as viewed from above and from below, respectively.

FIG. 8 is an enlarged plan view of a cutout in the embodiment.

FIG. 9A is a plan view showing an operation button provided on an operation surface in the embodiment.

FIG. 9B is a plan view showing the operation buttons provided on the operation surface in the embodiment.

FIG. 9C is a plan view showing the operation buttons provided on the operation surface in the embodiment.

FIG. 10A is a plan view of a resin plate and an operation button in the embodiment.

FIG. 10B is a plan view of the resin plate and the operation buttons in the embodiment.

Explanation of symbols

2 Heating Cooker

4 Top Plate

6 Housing

8 Heating surface

10 Display surface

12 Operation surface

12A 1st operation surface

12B Second operating surface

13 Operating unit

14 Electrodes

16 Substrate

17 Resin board

18. Retaining member

20 Spring

22 Substrate

24 Concave

26 Protrusion

26A Claw

28 Storage Department

30 Incision

32 Straight line

34 Curve

36 pieces

38 Fixed end

40 Free end (free piece)

41 Gap

42, 42A~42N Operation buttons

DETAILED DESCRIPTION

The first invention is a heating cooker, comprising: an insulating operating panel having an operating surface touched by a user; a substrate in contact with the operating panel below the operating surface and having an electrode on the upper surface; a resin plate in contact with the lower surface of the substrate to support the substrate; a spring in contact with the lower surface of the resin plate to apply force upward to the resin plate; and a control unit to calculate the electrostatic capacitance between the operating surface and the electrode.

According to this structure, the spring can push the resin plate upward to press the electrodes on the substrate against the lower surface of the operating plate to maintain the contact state. This eliminates the need to fix the substrate and electrodes to the operating plate, and can simplify the structure of the heating cooker.

According to a second invention, particularly in the first invention, a cutout penetrating in the up-down direction is formed in the resin plate at a position facing the substrate.

According to such a structure, the elasticity of the resin plate can be increased by the cutouts, and the shape of the resin plate and the substrate can be easily changed. Thus, the electrodes on the substrate can be pressed against the operation panel with high accuracy according to the shape of the operation panel.

According to a third invention, particularly in the second invention, the cutout has a portion extending in the left-right direction.

According to such a configuration, the elasticity of the resin plate and the substrate can be increased in a wide range, and even when the operation surface is long in the left and right direction, the electrodes on the substrate can be pressed against the operation panel with high accuracy.

A fourth invention is particularly the second invention or the third invention, wherein in the resin plate, a piece having a fixed end and a free end is formed by the cutout.

According to such a configuration, by forming the sheet, the elasticity of the resin plate can be increased in the peripheral region including the sheet.

According to the fifth invention, especially in the fourth invention, the operating surface of the operating panel has a first operating button and a second operating button different from the first operating button, the electrode of the substrate has a first electrode opposite to the first operating button and a second electrode opposite to the second operating button, and the free end of the sheet is arranged at a position opposite to the first electrode and the second electrode.

According to such a structure, two operation buttons and two electrodes can be supported by one sheet.

According to a sixth aspect of the present invention, particularly in the fifth aspect of the present invention, the spring is disposed at a position facing the free end of the sheet.

According to such a structure, one spring can correspond to two electrodes and the operation button.

The seventh invention is particularly any one of the fourth to sixth inventions, wherein a free piece having an arc-shaped outer circumference is formed at the free end of the piece, and the maximum width of the free piece is larger than the maximum width of the fixed end.

According to such a structure, the free piece can evenly bear the force generated by the spring. In addition, by making the maximum width of the fixed end smaller than the maximum width of the free piece, the fixed end is easily elastically deformed.

In the eighth invention, in particular, in any one of the fourth to seventh inventions, a cutout is formed inside the fixed end so as to penetrate the resin plate in the up-down direction.

According to such a structure, the resin plate is more easily elastically deformed.

According to the 9th invention, in particular, in any one of the 1st to 8th inventions, the heating cooker further comprises a retaining member for retaining the resin plate and the spring from below, the resin plate having a protrusion extending downward toward the retaining member, and the retaining member comprising: a storage portion for storing the protrusion of the resin plate in a manner that limits horizontal movement but allows sliding in an up and down direction.

According to such a configuration, the resin plate and the substrate can be positioned in the horizontal direction, and the electrodes on the substrate can be pressed against the operation panel with high accuracy.

According to a tenth invention, in particular, in any one of the first to ninth inventions, the operation panel is a top plate of an induction heating cooker.

According to such a structure, it can be applied to an induction heating cooker.

The 11th invention, in particular, in any one of the 1st to 10th inventions, the operating surface of the operating panel has: a maximum firepower button for receiving an instruction to control the firepower to a maximum value; a firepower adjustment button for receiving an instruction to control the firepower in a step-by-step manner; and other operating buttons, which are arranged between the maximum firepower button and the firepower adjustment button.

According to such a structure, by arranging the maximum power button and the power adjustment button, the convenience of the user related to the control of the power can be improved. In addition, by arranging other operation buttons between them, the pressing error of the two buttons can be suppressed.

According to the 12th invention, particularly in the 11th invention, the operation surface has a plurality of operation buttons including the maximum heat power button, the heat power adjustment button, and the other operation buttons, and the maximum heat power button is set as an end operation button among the plurality of operation buttons.

According to such a structure, the possibility of mistakenly pressing the maximum heating power operation button can be reduced, and safety can be improved.

The 13th invention is particularly any one of the 1st to 12th inventions, wherein another substrate electrically connected to the substrate is arranged below the resin plate.

According to such a structure, by providing two substrates, more flexible control can be performed.

The 14th invention is particularly any one of the 1st to 13th inventions, wherein a plurality of the springs are arranged in a row in the left-right direction, and positions of adjacent springs in the plurality of springs are offset from each other in the front-rear direction.

According to such a configuration, by arranging the springs to be offset in the front-rear direction, it is possible to bias the resin plate in a more balanced manner.

(Implementation Method)

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 and Fig. 2 are diagrams showing a schematic structure of a heating cooker 2 according to an embodiment. Fig. 1 is a perspective view of the heating cooker 2, and Fig. 2 is a top view of the heating cooker 2. In Fig. 1 and Fig. 2, the left-right direction is referred to as the A direction, the front-back direction is referred to as the B direction, and the up-down direction is referred to as the C direction.

The heating cooker 2 shown in Fig. 1 and Fig. 2 is a device for heating and cooking food (not shown) as an object to be heated. The heating cooker 2 of this embodiment is an induction heating cooker that heats the object to be heated by induction heating, and is also called an "IH cooking heater".

As shown in FIG. 1 , the cooking device 2 includes a top plate 4 and a casing 6 .

The top plate 4 is a plate-shaped member for placing and heating the object to be heated. The top plate 4 is formed of an insulating material (e.g., glass, ceramic). The housing 6 is a box-shaped member that supports the top plate 4 from below and stores various components between the top plate 4. The heating cooker 2 is installed in the kitchen by inserting the housing 6 into the opening of the tabletop provided in the overall kitchen.

As shown in FIG. 2 , a heating surface 8 , a display surface 10 , and an operation surface 12 are provided on the upper surface of the top plate 4 .

The heating surface 8 is a surface area for placing and heating the object to be heated. A guide display unit (not shown) for guiding the placement of the object to be heated may also be provided on the heating surface 8. The display surface 10 is a surface area for displaying information related to the operation of the heating cooker 2. The display surface 10 of this embodiment is a full-dot liquid crystal panel. The operation surface 12 is a surface area for the user to operate the heating cooker 2. A plurality of operation buttons are provided on the operation surface 12.

The operation surface 12 of this embodiment includes a first operation surface 12A and a second operation surface 12B. A plurality of operation buttons are provided on each of the operation surfaces 12A and 12B. The details of the operation buttons will be described later.

In the present embodiment, a capacitive touch panel is used as the operation surface 12. The user can perform various operations of the cooking device 2 by touching operation buttons on the operation surface 12.

Since an electrostatic capacitance touch panel is adopted, an operation unit including electrodes and a substrate is provided below the operation surface 12. The structure of the operation unit will be described with reference to FIG3 .

Fig. 3 is a perspective view of the operation unit 13. Fig. 3 shows the operation unit 13 provided just below the operation surface 12B shown in Fig. 2. An operation unit having the same structure is also provided just below the operation surface 12A, but illustration and description thereof are omitted.

As shown in FIG. 3 , the operation unit 13 includes a plurality of electrodes 14 , a substrate 16 , a resin plate 17 , and a holding member 18 .

The electrode 14 is an electrode formed on the upper surface of the substrate 16. The plurality of electrodes 14 are arranged in a row along the A direction, which is the left-right direction. The electrode 14 of the present embodiment is a solid electrode (Solid Electrode) formed of copper foil on the substrate 16.

The substrate 16 is a substrate on which the electrodes 14 are formed and supported. The substrate 16 has built-in wiring electrically connected to the electrodes 14. The wiring is connected to other substrates (for example, the substrate 22 described later) via a connector. The substrate 16 of this embodiment is a plate-shaped member formed elongated in the A direction along the arrangement direction of the electrodes 14.

The electrode 14 and the substrate 16 are arranged directly below the operation surface 12 of the top plate 4 and are pressed against the lower surface of the top plate 4. The electrode 14 is attached to the upper surface of the substrate 16, and the shape of the electrode 14 changes as the shape of the substrate 16 changes.

The resin plate 17 is an insulating member that supports the electrode 14 and the substrate 16 from below. The resin plate 17 is in contact with the lower surface of the substrate 16 and supports the substrate 16 from below. The resin plate 17 of this embodiment is a plate-shaped member that is elongated in the direction A, similarly to the substrate 16. The resin plate 17 is bonded to the lower surface of the substrate 16 by a double-sided tape.

The holding member 18 is a member that holds the resin plate 17 from below. The electrode 14, the substrate 16, and the resin plate 17 are held by the holding member 18. The holding member 18 of the present embodiment is formed of the same insulating resin material as the resin plate 17.

Fig. 4 is an exploded perspective view of the operating unit 13 shown in Fig. 3. Although not shown in Fig. 3, as shown in Fig. 4, the operating unit 13 is further provided with a plurality of springs 20 and a base plate 22.

The plurality of springs 20 are biasing members that bias the resin plate 17 upward. The springs 20 bias the resin plate 17 upward while being housed in the plurality of recesses 24 provided in the holding member 18. The plurality of springs 20 of this embodiment do not contact or conduct with the electrode 14 and the substrate 16, and do not function as electrical wiring.

As shown in FIG4 , a plurality of protrusions 26 are provided on the resin plate 17. The protrusions 26 are protrusions extending downward from the resin plate 17 toward the holding member 18. The protrusions 26 are accommodated in an accommodation portion 28 provided in the holding member 18.

The housing portion 28 is an annular portion that receives the protrusion 26. The housing portion 28 houses the protrusion 26 so as to be movable in the up-down direction.

The state where the protrusion 26 is inserted into the storage portion 28 is shown in FIG. 5A and FIG. 5B. In FIG. 5A, the protrusion 26 is inserted into the storage portion 28, and the resin plate 17 is in contact with the upper surface of the retaining member 18. At this time, the protrusion 26 inserted into the storage portion 28 can move in the up and down direction, so as shown in FIG. 5B, the resin plate 17 with the protrusion 26 and the substrate 16 can float by the action of the spring 20. Thus, the substrate 16 and the electrode 14 on the substrate 16 can rise and contact toward the lower surface of the top plate 4, and then their contact state can be maintained. Therefore, there is no need to fix the substrate 16 to the lower surface of the top plate 4, and the structure of the heating cooker 2 can be simplified.

The protrusion 26 accommodated in the accommodation portion 28 can move in the vertical direction, and is restricted from moving in the horizontal direction. Therefore, the resin plate 17 and the substrate 16 can be positioned in the horizontal direction. Thus, the substrate 16 and the electrode 14 can be pressed against the top plate 4 with high precision.

As shown in Fig. 4, Fig. 5A, and Fig. 5B, a claw 26A is provided at the front end of the protrusion 26. The claw 26A prevents the protrusion 26 from accidentally falling off from the storage portion 28.

The substrate 22 shown in FIG. 4 is a substrate different from the substrate 16, and is electrically connected to the substrate 16 via wiring or the like. The substrate 22 has a function of receiving input from the operating unit 13. For example, the substrate 22 calculates the electrostatic capacitance between the operating surfaces 12A, 12B and the plurality of electrodes 14, and outputs various control signals based on the calculated values. The control signal is, for example, a command to control the output of each heating coil (not shown) located below the heating surface 8, and is sent to a converter substrate (not shown) provided together with the heating coil. The substrate 22 is electrically connected to the converter substrate, and has a function of receiving the current heating state from the converter substrate and causing the operating surfaces 12A, 12B to display the heating state. The converter substrate has a function of inputting a control signal from the substrate 22 to control the heating of the coil. By electrically connecting these substrates, a "control unit" that controls the operation of the heating cooker 2 is formed.

FIG. 6 is a plan view showing a state in which the spring 20 shown in FIG. 4 is accommodated in the recess 24 of the holding member 18 .

As shown in Fig. 6, the plurality of springs 20 are arranged in a row along the A direction, which is the left-right direction, and are arranged offset from each other along the B direction. In other words, the positions of the adjacent springs 20 in the plurality of springs 20 in the front-back direction are offset from each other. With such an arrangement, the resin plate 17 can be more evenly applied.

Next, the relationship between the electrode 14, substrate 16, and resin plate 17 in the operation unit 13 will be described using Fig. 7. Fig. 7 is a diagram showing a perspective view of the electrode 14, substrate 16, and resin plate 17 viewed from above and from below, respectively.

As shown in Fig. 7, a plurality of cutouts 30 are formed in the resin plate 17. The cutouts 30 are through holes that penetrate the resin plate 17 in the thickness direction. By providing the cutouts 30, the elasticity of the resin plate 17 can be increased around the cutouts 30. As a result, the shape of the resin plate 17 and the substrate 16 can be easily changed, and the substrate 16 and the electrode 14 can be brought into closer contact with the lower surface of the top plate 4, thereby being pressed with high precision.

Fig. 8 is an enlarged view of the cutout 30 shown in Fig. 7. As shown in Fig. 8, the cutout 30 of the present embodiment has a straight portion 32 and a curved portion 34.

The straight portion 32 is a portion extending in a straight line, and as shown in FIG8 , extends in the left-right direction A. Two straight portions 32 are provided, and are arranged in parallel with a gap in the front-back direction B. The two straight portions 32 are connected to the ends of the curved portion 34, respectively.

The curved portion 34 is a portion extending in a curved shape. As shown in Fig. 8 , the curved portion 34 is formed in an arc shape.

Providing a portion extending in the horizontal direction like the straight portion 32 can increase the elasticity of the resin plate 17 and the substrate 16 in a wide range. Even when the operation surface 12 is long in the horizontal direction, the substrate 16 and the electrode 14 can be pressed against the top plate 4 with high accuracy.

By providing the cutout 30 having the above-described shape, a piece 36 of the resin plate 17 is formed inside the cutout 30. The piece 36 of the present embodiment has a fixed end 38 and a free end 40.

8 , the spring 20 is disposed at a position opposite to the free end 40 . The spring 20 contacts the free end 40 , and the spring 20 presses a particularly elastic portion of the resin plate 17 , so that the urging force of the spring 20 can be effectively transmitted to the resin plate 17 .

The free end 40 is surrounded by the cutout 30 except for the fixed end 38, and the free end 40 constitutes a free piece. By providing the free end 40 as such a free piece, the biasing force generated by the spring 20 can be efficiently transmitted through the resin plate 17.

Furthermore, in this embodiment, the maximum width D1 of the fixed end 38 is set smaller than the maximum width D2 of the free end 40. By increasing the maximum width of the free end 40, the free end 40 can evenly receive the force generated by the spring 20.

A notch 41 is provided inside the fixed end 38. The notch 41 is a notch independent of the cutout 30, and extends in the direction A in parallel with the straight portion 32. By providing such a notch 41, the elasticity of the fixed end 38 can be increased.

Returning to Fig. 7, the free end 40 of the notch 30 and the spring 20 are arranged at positions facing between the two electrodes 14. One notch 30 and one spring 20 are made to correspond to two electrodes 14, and the number of springs 20 and notches 30 is thinned out relative to the number of electrodes 14. Thus, compared with the case where the springs 20 and notches 30 are provided one-to-one with respect to the electrodes 14, the manufacturing cost, labor, and time of the operating unit 13 can be reduced.

As shown in Fig. 7, in this embodiment, the directions of adjacent slits 30 among the plurality of slits 30 are different (ie, leftward and rightward). However, the present invention is not limited to this, and the directions of the slits 30 may be unified to the same direction.

Next, the operation buttons provided on the operation surfaces 12A and 12B shown in FIG. 2 will be described using FIGS. 9A to 9C .

FIG. 9A shows operation buttons 42 provided on first operation surface 12A, FIG. 9B shows operation buttons 42 provided on the left side of second operation surface 12B, and FIG. 9C shows operation buttons 42 provided on the right side of second operation surface 12B.

As shown in FIG. 9A , six operation buttons 42A to 42F are provided on the first operation surface 12A. The operation button 42A is a button for receiving an instruction to select the "frying pan mode". The operation button 42B is a button for receiving an instruction to select the "frying mode". The operation button 42C is a button for receiving an instruction to reduce the firepower in a step-by-step manner. The operation button 42D is a button for receiving an instruction to increase the firepower in a step-by-step manner. The operation button 42E is a button for receiving an instruction to operate the timing function. The operation button 42F is a button for receiving an instruction to switch the heating on/off in the area corresponding to the first operation surface 12A in the heating surface 8.

As shown in Fig. 9B, six operation buttons 42G to 42L are provided on the left side of the second operation surface 12B. The operation button 42G is a button for receiving an instruction to control the firepower to the maximum value. The operation button 42H is a button for receiving an instruction to select the "porridge mode". The operation button 42I is a button for receiving an instruction to reduce the firepower in a step-by-step manner. The operation button 42J is a button for receiving an instruction to increase the firepower in a step-by-step manner. The operation button 42K is a button for receiving an instruction to operate the timing function. The operation button 42L is a button for receiving an instruction to switch the heating on/off in the area corresponding to the second operation surface 12B in the heating surface 8.

As shown in Fig. 9C, two operation buttons 42M and 42N are provided on the right side of the second operation surface 12B. The operation button 42M is a button for receiving an instruction to switch the lock/unlock of the operation on the operation surface 12. The operation button 42N is a button for receiving an instruction to switch the power of the heating cooker 2 on/off.

In the example shown in Fig. 9B, the "maximum firepower button" that sets the firepower to the maximum value, that is, the operation button 42G, is arranged at the left end. By setting the maximum firepower button as a button at the end of the group of operation buttons 42G to 42L shown in Fig. 9B, it is possible to suppress the maximum firepower button from being pressed by mistake, and safety can be improved.

In the example shown in FIG. 9B , in addition to the operation button 42G, two operation buttons 42I and 42J are provided as "firepower adjustment buttons" for adjusting the firepower. Furthermore, an operation button 42H is provided as another button between the operation button 42G as the maximum firepower button and the firepower adjustment buttons 42I and 42J. According to such a configuration, it is possible to suppress the pressing error of the maximum firepower button and the firepower adjustment button.

A plurality of electrodes 14 shown in FIG. 3 and the like are provided corresponding to the operation buttons 42A to 42N shown in FIG. 9A to FIG. 9C , respectively. One electrode 14 is arranged directly below each of the operation buttons 42A to 42N, and when the user presses one of the operation buttons 42, the electrostatic capacitance between the electrode 14 directly below the pressed operation button 42 and the top plate 4 changes. The control unit such as the substrate 16 calculates the electrostatic capacitance and detects the change in the electrostatic capacitance as a control signal.

10A and 10B , the positional relationship between the notch 30 and the operation button 42 when one spring 20 and one notch 30 are provided for two electrodes 14 as shown in FIG. 7 will be described.

10A and 10B are diagrams showing the resin plate 17 by solid lines and the operation buttons 42G to 42N shown in FIGS. 9B and 9C by dotted lines when the resin plate 17 is viewed from above.

As shown in FIG. 10A and FIG. 10B , the cutouts 30 of the resin plate 17 are formed in the regions spanning the two operation buttons 42. The free end 40 of the sheet 36 formed by the cutouts 30 is arranged to be opposite to the position between the two operation buttons 42. Since the elasticity of the resin plate 17 can be increased in the peripheral region including the free end 40, the elasticity of the region including the two operation buttons 42 can be increased by only one free end 40. In this way, by arranging the cutouts 30 with respect to the number of the operation buttons 42, the manufacturing cost, labor, and time of the operation unit 13 can be reduced.

That is, the operation surface 12 of the top plate 4 has a first operation button 42 and a second operation button 42 different from the first operation button 42, and the electrode 14 has a first electrode 14 opposed to the first operation button 42 and a second electrode 14 opposed to the second operation button 42. In addition, the free end 40 of the sheet 36 is arranged at a position opposed to the first electrode 14 and the second electrode 14. According to such a structure, two operation buttons 42 and two electrodes 14 can be corresponded by one sheet 36.

As described above, the heating cooker 2 of this embodiment includes a top plate 4, a substrate 16, a resin plate 17, a spring 20, and a control unit. The top plate 4 is an insulating member having an operation surface 12 that is touched by a user. The substrate 16 is a member that contacts the top plate 4 below the operation surface 12 and has an electrode 14 on its upper surface. The resin plate 17 is a member that contacts the lower surface of the substrate 16 and supports the substrate 16. The spring 20 contacts the lower surface of the resin plate 17 and applies force to the resin plate 17 upward. The control unit is a member that calculates the electrostatic capacitance between the operation surface 12 and the electrode 14.

According to this structure, the spring 20 urges the resin plate 17 upward, so that the electrode 14 on the substrate 16 can be pressed against the lower surface of the top plate 4. Therefore, it is not necessary to fix the substrate 16 and the electrode 14 to the top plate 4, and the structure of the heating cooker 2 can be simplified.

The above-mentioned embodiments are cited to illustrate the invention of the present disclosure, but the invention of the present disclosure is not limited to the above-mentioned embodiments. For example, in the embodiments, the case where the heating cooker 2 is an induction heating cooker that heats the heated object by induction heating is described, but it is not limited to such a case. The same structure can also be applied to any heating cooker such as a gas stove. In the case of a gas stove, etc., an insulating operating plate having an operating surface touched by a user can also be provided as the top plate 4.

The present disclosure is fully described in association with the preferred embodiments while referring to the drawings, but various deformations and modifications are clear to those skilled in the art. Such deformations and modifications should be understood to be included therein as long as they do not depart from the scope of the present disclosure based on the scope of the attached patent claims. In addition, the combination of elements in each embodiment and the change of order can be realized without departing from the scope and idea of the present disclosure.

Industrial Applicability

The present disclosure is applicable to any cooking device that heats and cooks an object to be heated.

Claims (14)

1. A heating cooker comprising: An insulating operating panel having an operating surface that is touched by a user; a substrate, contacting the operation panel below the operation surface and having an electrode on the upper surface; A resin plate, contacting with the lower surface of the substrate, supporting the substrate; a spring, contacting the lower surface of the resin plate and applying force to the resin plate upward; and The control unit calculates the electrostatic capacitance between the operation surface and the electrode. 2. The heating cooker according to claim 1, wherein: A cutout penetrating in the up-down direction is formed in the resin plate at a position facing the base plate. 3. The heating cooker according to claim 2, wherein: The cutout has a portion extending in the left-right direction. 4. The heating cooker according to claim 2, wherein: In the resin plate, a piece having a fixed end and a free end is formed by the cutout. 5. The heating cooker according to claim 4, wherein: The operation surface of the operation panel has a first operation button and a second operation button different from the first operation button. The electrode of the substrate includes a first electrode facing the first operation button and a second electrode facing the second operation button. The free end of the sheet is disposed at a position facing between the first electrode and the second electrode. 6. The heating cooker according to claim 5, wherein: The spring is arranged at a position facing the free end of the sheet. 7. The heating cooker according to claim 4, wherein: A free piece having an arc-shaped outer circumference is formed at the free end of the piece. The maximum width of the free piece is greater than the maximum width of the fixed end. 8. The heating cooker according to claim 4, wherein: A cutout is formed on the inner side of the fixed end so as to penetrate the resin plate in the up-down direction. 9. The heating cooker according to any one of claims 1 to 8, wherein: The heating cooker further comprises: a holding member that holds the resin plate and the spring from below, The resin plate has a protrusion extending downward toward the holding member, The holding member includes a housing portion that houses the protrusion of the resin plate so as to restrict horizontal movement but enable vertical sliding. 10. The heating cooker according to any one of claims 1 to 8, wherein The operation panel is a top panel of the induction heating cooker. 11. The heating cooker according to any one of claims 1 to 8, wherein The operating surface of the operating panel has: The maximum fire button is used to accept instructions to control the fire to the maximum value; A fire adjustment button that accepts instructions to control fire in a step-by-step manner; and Other operation buttons are arranged between the maximum heat power button and the heat power adjustment button. 12. The heating cooker according to claim 11, wherein: The operation surface has a plurality of operation buttons including the maximum firepower button, the firepower adjustment button, and the other operation buttons. The maximum power button is provided as an operation button at the end of the plurality of operation buttons. 13. The heating cooker according to any one of claims 1 to 8, wherein Another substrate electrically connected to the substrate is arranged below the resin plate. 14. The heating cooker according to any one of claims 1 to 8, wherein The springs are arranged in a plurality along the left-right direction. Adjacent springs among the plurality of springs are offset from each other in positions in the front-rear direction.