JP2008091193A - Induction cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compose a switch part which is easily operated by making the height of a top plate top surface as low as possible, above a cabinet and guided by light so that a spot to be operated can be readily discriminated. <P>SOLUTION: The induction cooker is made thin without structural stacking in the vertical direction by arranging a light-emitting part 35 and a contact point terminal 38 to the side of a light guide plate 31. Furthermore, a light is guided by the light guide plate 31, a drawing pattern display 27 prompting an operation formed by a conductive film 28 is made to pop up by the guided light, the user is made to effectively recognize the operation, the spot to be operated can be discriminated easily and operability is improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an induction heating cooker.

  An induction heating cooker applying induction heating has many features such as high efficiency, safety and cleanliness, and is widely used as a built-in induction heating cooker embedded in a table or cabinet of a system kitchen. Along with the spread, the function as a cooker has been advanced, but the operation has become complicated. Therefore, there is a demand for a device having an easy-to-operate function such as guiding with light so that an operation location can be easily identified. Also, in the built-in type induction heating cooker, the height of the top surface of the top plate on the cabinet is made as low as possible to create a unity feeling with the kitchen, and the switch part that is frequently used in actual use of the induction heating cooker The demand for a form to be placed on the top plate of the main body is increasing year by year.

  Conventionally, as an operation switch for recognizing an operation with this kind of light, for example, there is one described in Patent Document 1.

FIG. 8 shows a conventional operation switch described in Patent Document 1. In FIG. As shown in FIG. 8, the printed wiring board 3 on which one side of the detection element 1 and the light emitting element 2 is provided and the area on the printed wiring board 3 where the detection element 1 and the light emitting element 2 are provided. The case main body 4 arranged in this manner, the movable member 6 that is movably attached to the case main body 4 and that is provided with the detected portion 5 that is detected by the detection element 1, and the movable member 6 from the printed wiring board 3. An urging member 7 that urges in a separating direction, a cover member 8 that is directly or indirectly attached to the movable member 6, and light emission that is fixed in the case body so that one end is positioned in the vicinity of the light emitting element 2. A light guide member 9 that guides the light emitted from the element 2 to the cover member 8 side. When the detection element 1 determines that “the movable device 6 is pressed and the switch device is on”, the print Form on wiring board 3 The has been that the control circuit and the light emitting element 2 is controlled to emit light in a predetermined color. The light emitted from the light emitting element 2 enters from one end of the light guide member 9 and is guided to the upper end. The light that has reached the upper end is configured to uniformly emit light on the surface of the cover member by the diffusing member 10 applied to the upper end surface of the light guide member 9, indicating that the light is on.
JP-A-2005-85506

  However, in the induction heating cooker, it is a type that is built into the kitchen cabinet, the height of the top plate top surface is as low as possible from the top of the cabinet, and an attempt is made to place a switch part that is frequently used in actual use in front of the top plate. In this case, it is necessary to form a switch unit between the top plate lower surface and the top surface of the cabinet, that is, the switch unit needs to be thinned. However, in the conventional switch configuration, the light guide unit and the light emission are required. The control section, operation section, and detection section are stacked in the vertical direction, making it thinner and reducing the height of the top plate top surface from the cabinet as much as possible. Placed between the top plate bottom surface and the top surface of the cabinet , There is a problem that it is difficult to configure easily operable switch unit guiding a light so that it can easily identify where to operate.

  The present invention solves the above-mentioned conventional problems, guides with light so as to easily identify the location to be operated, and reduces the height of the top surface of the top plate from the top of the cabinet as much as possible. An object of the present invention is to provide an easy-to-use induction heating cooker that can be easily operated by anyone by arranging a high switch portion in front of the top plate.

  In order to solve the conventional problems, an induction heating cooker according to the present invention includes an induction heating unit having an induction heating coil, a top plate provided above the induction heating unit and on which an object to be heated is placed, In an induction heating cooker including an operation unit provided on the top plate, the top plate having light transmittance disposed on the upper surface of the main body and a symbol display for prompting operation on the back surface of the top plate are non-light-transmissive. From the projection shape of the symbol display that prompts one operation of the conductive indicator provided immediately below the conductive indicator provided at least one for the symbol display that prompts one operation and the conductive indicator formed of a conductive film A light guide plate that also extends in the outer peripheral direction, a light shielding member provided on the outer periphery of the light guide plate, a light emitting portion disposed on a side end surface portion of the light guide plate, and a front portion disposed below the light guide plate and the light emitting portion. A control circuit unit to which a light emitting unit is connected and a conductive unit disposed outside the light emitting unit and the light guide plate in contact with an end of the conductive display unit or a part of the conductive display unit extended by a conductive film The contact terminal connected to the control circuit unit made of a conductive material, and a capacitance type touch detection unit provided in the control circuit unit, facing the symbol display that prompts the operation of the conductive display unit It has the said operation part which operates the top plate surface.

  Thereby, between the lower surface of the top plate at a position overlapping with the upper surface of the cabinet, a conductive display part formed of a conductive film and a light guide plate for illuminating and floating the conductive display part are arranged, the other light emitting part, the control circuit part, The contact terminals can be configured in the body that is in the opening of the cabinet and can be made thin. In addition, it can be operated at a position away from the heating unit, and the temperature of the operation unit on the top surface of the top plate displayed by the conductive display unit that is operated by touching the hand during heating does not increase, and can be used safely. In addition, light is guided by the light guide plate, and the display of pictures, designs, etc. is extracted and the conductive display part formed of a non-light-transmitting conductive film is lifted by light so that the user can effectively recognize the operation. . Moreover, since it is an electrostatic capacitance type touch detection system, it is excellent in durability compared with a system that detects an operation by moving a structure.

  The induction heating cooker according to the present invention solves the above-mentioned conventional problems, is guided by light so that the location to be operated can be easily identified, and the height of the top plate top surface from the cabinet is made as low as possible. By placing the switch part that is frequently used in use in front of the top plate, it can be operated safely and easily by anyone at a position away from the heating part, and it is easy to use and has excellent durability.

  1st invention comprises the induction heating means which has an induction heating coil, the top plate which is provided above the said induction heating means and in which a to-be-heated material is mounted, and the operation part provided in the said top plate. In the induction heating cooker, the top plate having light transmittance disposed on the top surface of the main body, the conductive display portion formed of a non-light-transmissive conductive film on the back surface of the top plate, and one operation A light guide plate that is larger in the outer peripheral direction than the projected shape of the symbol display that prompts one operation of the conductive display portion provided immediately below the conductive display portion arranged at least one for the symbol display that prompts the display, and the light guide plate A light-shielding member provided on the outer periphery; a light-emitting portion disposed on a side end surface portion of the light guide plate; a control circuit portion to which the light-emitting portion disposed below the light guide plate and the light-emitting portion is connected; An end of the display unit or a part of the conductive display unit is in contact with a portion extended by a conductive film, and is connected to the control circuit unit made of a conductive material disposed outside the light emitting unit and the light guide plate. The operation unit configured to include a contact terminal and a capacitive touch detection unit provided in the control circuit unit, and to operate the top plate surface facing the symbol display that prompts the operation of the conductive display unit. Thus, the light emitting portion and the contact terminal are arranged laterally from the light guide plate, and there is no structural stacking in the vertical direction, and the thickness can be reduced. In addition, light is guided by the light guide plate, and the symbol display that prompts the operation of the conductive display part formed of a non-light-transmitting conductive film is raised by light, and the operation is recognized effectively by the user and operated Can be easily determined, and the operability can be improved. Moreover, since it is an electrostatic capacitance type touch detection system, there is no movable mechanism and durability can be improved compared with the system which detects an operation by moving a structure.

  The second aspect of the invention is particularly darker than the conductive display part that conceals the conductive display part between the upper surface of the light-transmitting top plate of the first invention or the conductive display part on the back surface of the top plate. A concealing printing film made of color is formed, and the concealing printing film has a light-transmitting property that causes the conductive display part on the back surface of the top plate to be lifted by light guided by a light guide plate when the light emitting part emits light. Accordingly, the display unit to be operated is concealed or light-transmitted, so that the user can easily identify the operation, and the operability can be improved.

  The third aspect of the invention is particularly provided with a frame part that protrudes from the outer peripheral surface of the main body outer casing that enters the opening of the cabinet in which the main body of the first aspect of the invention is incorporated, and is arranged at a position at least partially overlapping the upper surface of the cabinet. , At least a portion of the conductive display portion on the back surface of the top plate and at least a portion of the light guide plate provided immediately below the conductive display portion are positioned so as to overlap the upper surface of the frame portion, and the light emitting portion, the contact terminal, and the control circuit portion are opened in the cabinet. A member formed in the frame part on the top surface of the cabinet is made thin with a top plate and a light guide plate by providing the inside of the main body outer casing inside and having one end of the light guide plate extending to the light emitting part. It can be configured and the conductive display on the back of the top plate can be provided up to the top of the cabinet. , Not increased temperature of the operating portion of the top plate top surface displayed a conductive display unit for operating by touch even during heating, it can be used safely. The height of the upper surface of the top plate from the top of the cabinet can be made as low as possible, and a switch part that is frequently used in actual use can be arranged at a position where the hand in front of the top plate can easily reach, thereby improving usability.

  In the fourth aspect of the invention, in particular, the light emitting part is arranged in a downward direction by adopting a configuration in which the light emitting part is arranged at one end of the light guide plate bent downward in the outer casing of the main body that has entered the opening of the cabinet of the third aspect of the invention. By providing in, the heat influence to the light emission part at the time of a heating can be reduced.

  In the fifth invention, in particular, by forming a diffusing portion on the lower surface of the opposing light guide plate directly below the conductive display portion of the first invention, light is diffused in the diffusing portion, light unevenness is reduced, and the display is clarified. It can be raised and visibility can be improved.

  In particular, the sixth aspect of the invention is that the frame portion of the third aspect of the invention is connected to the ground, and one operation of the conductive display portion is encouraged to the opposite frame portion immediately below the symbol display that prompts one operation of the conductive display portion. By providing an opening larger in the outer peripheral direction than the projected shape of the display, the influence on the detection of the capacitance change of the frame part is reduced, and the change in capacitance due to surface contact when operated by the user is stabilized. Detection performance can be improved.

  In the seventh aspect of the invention, in particular, by providing a reflecting plate formed of a white resin or a coated steel plate on the lower surface of the light guiding plate of the first aspect of the invention, the light guide can be effectively reflected upward, and display can be performed. It can be clearly raised and visibility can be improved.

  In the eighth invention, in particular, one light guide plate and one light emitting portion are arranged for each symbol display that prompts one operation of the conductive display portion of the first invention, and the light guide plates are separated by a light shielding member. By doing so, it is possible to classify the light guide, and to display each display in a light-emitting manner only at a location necessary for the operation, and to make the operation visible to the user in an easy-to-understand manner.

  In particular, the ninth invention provides the heating means of the first invention in two places on the left and right front and one in the center back, and provides an operation section for operating each heating means in the front part facing each heating means, By arranging the central operation unit on the back side of the product as compared with the left and right operation units, the position of the operation unit of each heating means can be visually recognized by the user in an easy-to-understand manner.

  In the tenth aspect of the invention, in particular, a top plate holding portion is provided on the back surface of the top plate of the first aspect of the invention, a light guide plate, and a holder for holding all of the light emitting portion, the control circuit portion, and the contact terminal portion are provided. By adopting a configuration in which the top plate holding portion is locked, the positions of the conductive display portion, the light guide portion, and the light emitting portion can be accurately fixed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic diagram showing the overall configuration of an induction heating cooker according to the first embodiment of the present invention. FIG. 2 shows a cross-sectional view of the main part of the operation part of the induction heating cooker in the first embodiment of the present invention. FIG. 3 shows an assembled state diagram of the cabinet of the induction heating cooker and the outer shell of the main body incorporated in the cabinet according to the first embodiment of the present invention. FIG. 4 shows a positional relationship diagram of the heating unit, the display unit, and the operation unit of the induction heating cooker according to the first embodiment of the present invention. FIG. 5 shows an enlarged view of the units constituting the display unit and the operation unit of the induction heating cooker in the first embodiment of the present invention. FIG. 6 shows an attachment diagram of units constituting the display unit and the operation unit on the top unit of the induction heating cooker according to the first embodiment of the present invention. FIG. 7 shows an operation operation state diagram of the induction heating cooker in the first embodiment of the present invention.

  As shown in FIG. 1, the cabinet 11 is provided with an opening hole 12 for incorporating the main body. A light-transmitting top plate 13 formed of crystallized glass having a size covering the opening hole 12 is disposed on the upper surface of the cabinet 11. As shown in FIG. 2, a top plate holding portion 14 for holding the top plate from below is adhered to the outer peripheral portion of the back surface of the top plate 13 with a silicon adhesive, and further, the side plate and the top plate holding portion from the upper outer periphery of the top plate. A top frame 15 having a U-shaped cross-section that holds the outer peripheral end of the lower surface of the part is bonded with a silicon adhesive to protect the outer periphery of the top plate. The top frame is made of a thin metal plate such as a stainless steel plate or enamel steel plate, and has a sufficient strength against scratches and the like. The frame portion is also formed of a thin sheet of hot dip galvanized steel sheet, and has a strength that can withstand the suspension of the main body outer casing in the cabinet 11.

  Further, as shown in FIG. 3, the main body outer casing 16 is accommodated in the opening hole 12 of the cabinet 11, and four side frame portions 17 projecting from the outer peripheral surface of the main body outer casing 16 to the outer periphery are formed on the upper surface of the cabinet 11. It is formed in an overlapping position and supports the main body outer casing 16 that is accommodated in the opening hole 12 of the cabinet 11. The frame portion 17 is connected to the ground.

  As shown in FIG. 1, right-side heating that heats the pan placed on the top surface of the top plate 13 on the lower surface of the top plate inside the top frame, on the front side of the main body outer casing 16 that fits in the opening hole of the cabinet 11. A coil 18 and a left heating coil 19 are provided, and a radial heater 20 using one heating wire is provided at the center back. Furthermore, a substantially circular pattern representing the heating portion is printed on the top plate 13 immediately above the right heating coil 18, the left heating coil 19, and the radial heater 20, so that the user can easily recognize the position where the pan is placed. ing.

  As shown in FIG. 4, a right display unit 21 representing an operation state corresponding to the right heating coil 18 and a right operation unit 22 in front of the right display unit 21 are provided in front of the right heating coil 18 in the top plate 13. ing. Similarly, a left display unit 23 representing an operation state corresponding to the left heating coil 19 and a right operation unit 24 are provided in front of the left display unit 23 in front of the left heating coil 19. Similarly, a central display unit 25 representing an operation state corresponding to the radial heater 20 is provided in front of the radial heater 20, and a central operation unit 26 is provided in front of the central display unit. Here, the central operation unit is arranged on the back side of the product as compared with the left and right operation units. By placing the central operation unit on the far side of the product as compared with the left and right operation units, the position of the operation unit of each heating means can be visually recognized by the user in an easy-to-understand manner.

  As shown in FIG. 2, a conductive display portion formed by a non-light-transmissive conductive film 28 such as a symbol display 27 for turning on / off, up / down, etc., which operates on the back surface of a light-transmissive top plate disposed on the upper surface of the main body. 29 is printed. A concealed printing film 30 made of a darker black than the conductive display portion that conceals the conductive display portion is printed and baked between the back surface of the top plate and the conductive display portion.

  A light guide plate 31 that is larger in the outer peripheral direction than the projected shape of the heating up “Δ” is provided immediately below the heating up “Δ” symbol display that prompts one operation. A symbol display that prompts one operation, for example, a diffusing portion 32 formed in a concavo-convex shape is provided on the lower surface of the light guide plate immediately below the heating up “Δ”. Further, a reflection plate 33 made of white resin is disposed on the lower surface of the light guide plate in which the diffusion portion is formed.

  Furthermore, an opening 34 that is larger in the outer peripheral direction than the projected shape of the symbol display heating up “Δ” is formed in a symbol display that prompts one operation, for example, an opposed grounded frame portion directly below the heating up “Δ”. Is provided.

  Here, the symbol display of the conductive display part on the back surface of the top plate and at least a part of the light guide plate provided immediately below are arranged at a position overlapping the upper surface of the frame part.

  A light emitting portion 35 made of LEDs is provided below the light guide plate 31 and the frame portion 17 in the main body outer casing 16 that is in the opening of the cabinet 11, and the main body outer shell in which the light guide plate 31 is in the opening of the cabinet 11 is provided. The light guide plate 31 is bent downward in the housing 16 so that one end surface of the light guide plate 31 extends to the light emitting unit 35.

  In particular, as shown in FIG. 5, one light guide plate and one light emitting unit are arranged for each symbol display that prompts one operation, and each of the light guide plates, for example, heating up “△” and down “▽”, respectively. A light-shielding member 36 made of a resin material colored in white is arranged between the light guide plates separately arranged immediately below.

  As shown in FIG. 2, the light emitting unit 35 is connected to the light guide plate 31 in the main body outer casing 16 that enters the opening of the cabinet 11 and the control circuit unit 37 provided below the light emitting unit 35 and the frame unit 17. Has been.

  A symbol display 27 formed by the conductive film 28 encouraging one operation, for example, a part of the heating up “Δ” is transferred to the upper part of the main body outer casing 16 in the opening of the cabinet 11 by the conductive film 28. The contact terminal 38 formed of a copper plate material is brought into contact with the portion. Here, the contact terminal 38 is arranged outside the light emitting portion 35 and the light guide plate 31, that is, inside the main body outer casing 16 so as not to interfere with light emission and light guide, and is connected to the control circuit portion 37. The control circuit unit 37 includes a capacitive touch detection unit using a microcomputer that detects an operation on the surface of the top plate 13 facing the symbol display 27.

  Further, the contact terminal 38 is attached in a state of being pressed against the conductive film 28 on the back surface of the top plate 13. The contact terminal 38 is made of a thin metal plate having a resilient shape, is always in contact with the conductive film 28 of the top plate 13, and is fixed to a resin parts holder 39 so that the mounting position is determined. Yes.

  Further, as shown in FIG. 6, the light guide plate 31, the reflection plate 33, the light shielding member 36, and the holder 40 that holds all of the light emitting unit 35, the control circuit unit 37, and the contact terminals 38 are positioned in the main body casing 16. The holder 40 is configured to be locked to the top plate holding portion 14 with a screw.

  Further, a right heating coil 18 and a left heating coil 19 for induction heating of the pan are connected to the inside of the main body casing 16 below the top plate 13 by lead wires, and an inverter circuit for energization control, and a radial heater and lead wires are used. A main circuit portion 41 having an energization control circuit to be connected and heated is provided in the main body. Furthermore, the control circuit unit 37 and the main circuit unit 41 are connected by lead wires so that command signals can be exchanged.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. The heating coil can receive a supply of current from the inverter circuit of the main circuit unit 41 to generate a magnetic field, generate an eddy current in a pan containing the cooked food that is to be heated, and generate heat to perform cooking. . The radial heater 20 is supplied with a current from the energization control circuit of the main circuit unit 41 and generates heat. This heating is controlled by the control circuit unit 37, and this control circuit unit 37, which has a capacitive touch detection unit by a microcomputer, transmits commands to the respective circuits to be controlled by a user's operation touch.

  And when a user touches, it is the structure which detects the electrostatic capacitance change by surface contact in the control circuit part 37, processes the signal with a microcomputer, and operate | moves. Then, the LED of the display unit provided near the contact terminal 38 in the parts holder blinks and lights to notify the user. Further, the frame portion 17 is connected to the ground, and one operation of the conductive display portion is prompted to the outer peripheral direction than the projected shape of the symbol display 27 that prompts one operation of the conductive display portion to the opposite frame portion 17 directly below the symbol display. By providing a large opening, it is possible to reduce the influence on the detection of the change in the capacitance of the frame portion 17.

  As shown in FIG. 7, first, in a state where the power is not turned on, a concealed printing film 30 made of a darker black is printed between the conductive display portion on the back surface of the top plate 13 and the conductive display portion that conceals the conductive display portion. The black print is visible to the user.

  In a state where the power is turned on, the corresponding light emitting portion 35 emits light to the light guide plate 31 arranged immediately under the heating “ON”, the light is guided, and there is no light leakage to the other by the light shielding member 36, The light is made uniform by the unevenness of the diffusing portion 32, and the light is reflected upward by the reflection plate 33, and the operation of the conductive display portion 29 formed of the non-light-transmissive conductive film 28 prompts the operation of the left and right centers. The symbol display heating “ON” of the part is floated by light, and the user can effectively recognize that the heating can be performed by touching the “ON”.

  When “ON” on the right operation unit is touched, a change in capacitance due to surface contact is detected by the control circuit unit 37, and the signal is processed by the microcomputer. Only the right operation unit 22 emits “ON”. Is turned off, and instead, the light emitting unit 35 corresponding to “OFF”, “△ (up)”, “▽ (down)” emits light, the display is raised, and current is supplied to the right heating coil 18 from the inverter circuit unit, Induction heating of the pot begins. At the same time, the user effectively recognizes that the heating coil heated by LED emission on the right display unit is the right heating coil. In addition, the user can be effectively recognized that the contents that can be operated next are only “OFF”, “△ (UP)”, and “▽ (DOWN)”.

  In addition, the members formed on the frame portion 17 on the upper surface of the cabinet 11 can be configured to be thin with the top plate 13 and the light guide plate 31, and the conductive display portion 29 on the back surface of the top plate 13 may be provided up to the location on the upper surface of the cabinet 11. It can be operated at a position away from the heating unit, and even when heated, the temperature gradient reduces the temperature of the operation unit on the top surface of the top plate displayed on the conductive display unit that is operated by touching even during heating it can. Moreover, the thermal effect on the light emitting part at the time of a heating can be reduced by providing the light emitting part below.

  As described above, in the present embodiment, a light-transmitting top plate disposed on the top surface of the main body, and a conductive display portion formed of a non-light-transmitting conductive film on the back surface of the top plate, the symbol display for which an operation is performed, A light guide plate that is larger in the outer peripheral direction than the projected shape of the symbol display that prompts one operation of the conductive display portion provided immediately below the conductive display portion arranged at least one for the symbol display that prompts one operation, and the light guide plate A light-shielding member provided on the outer periphery, a light-emitting portion disposed on a side end surface portion of the light guide plate, a control circuit portion to which the light-emitting portion disposed below the light guide plate and the light-emitting portion is connected, and an end portion of the conductive display portion or A contact terminal connected to the control circuit unit made of a conductive material that is in contact with a part of the conductive display unit extended by the conductive film and disposed outside the light emitting unit and the light guide plate, and provided in the control circuit unit Capacitive touch detector and With configured operating unit, the light emitting portion and the contact terminal is arranged laterally from the light guide plate, there is no structural stacking in a vertical direction, it can be made thinner. In addition, light is guided by the light guide plate, and the symbol display that prompts the operation of the conductive display part formed of a non-light-transmitting conductive film is raised by light, and the operation is recognized effectively by the user and operated Can be easily determined, and the operability can be improved. Moreover, since it is an electrostatic capacitance type touch detection system, there is no movable mechanism and durability can be improved compared with the system which detects an operation by moving a structure.

  Further, a concealing print film having a darker color than the conductive display part for concealing the conductive display part is formed between the upper surface of the light-transmitting top plate or the conductive display part on the back surface of the top plate, and the concealment print film The light-transmitting part has a light-transmitting property that causes the conductive display part on the back surface of the top plate to float by the light guided by the light guide plate, so that the display part to be operated is concealed or light-transmitted. Thus, the user can easily identify the operation, and the operability can be improved.

  In addition, a frame portion is provided that protrudes from the outer peripheral surface of the main body outer casing that enters the opening of the cabinet 11 into which the main body is incorporated and that is at least partially overlapped with the upper surface of the cabinet 11. At least a part of the light guide plate provided directly below the conductive display part is positioned so as to overlap the upper surface of the frame part, and the light emitting part, the contact terminal, and the control circuit part are provided in the outer casing of the main body that is in the opening of the cabinet 11. The light guide plate has a shape in which one end of the light guide plate extends to the light emitting portion, so that the member formed on the frame portion on the top surface of the cabinet 11 can be formed thin with the top plate and the light guide plate, and the conductive display on the back surface of the top plate. The part can be provided up to the top of the cabinet 11 and can be operated at a position away from the heating part. Is it not the temperature of the operating portion of the top plate top surface displayed a conductive display unit is high to operate, safe to use. The height of the top surface of the top plate from the top of the cabinet 11 can be made as low as possible, and the switch part that is frequently used in actual use can be arranged at a position where the hand in front of the top plate can easily reach, so that the usability can be improved.

  In addition, the light emitting part is arranged at one end of the light guide plate bent downward in the outer casing of the main body that is in the opening of the cabinet 11, so that the light emitting part is provided at the lower side, so that the light emitting part at the time of heating is provided. It is possible to reduce the influence of heat on.

  Furthermore, by forming a diffusing portion on the lower surface of the opposing light guide plate directly below the conductive display portion, light can be diffused by the diffusing portion to reduce light unevenness, and the display can be clearly raised to improve visibility. it can.

  In addition, the frame part is connected to the ground, and an opening larger in the outer peripheral direction than the projected shape of the symbol display that prompts one operation of the conductive display part to the opposite frame part directly under the symbol display that prompts one operation of the conductive display part By providing a part, the influence on the detection of the capacitance change of the frame part can be reduced, the change in the capacitance due to the surface contact when the user operates can be detected stably, and the detection performance is improved. be able to.

  In addition, by providing a reflector made of white resin or painted steel plate on the lower surface of the light guide plate, the light guide can be effectively reflected upward, and the display can be clearly raised to improve visibility. Can do.

  In addition, one light guide plate and one light emitting unit are arranged for each symbol display that prompts one operation of the conductive display unit, and the light guide plate is divided by a light shielding member to separate the light guides. In addition, each display can be displayed in a light-emitting manner only at a location necessary for the operation, and the operation can be easily recognized by the user.

  Furthermore, the heating means is provided in two places on the left and right front and one place in the center back, and an operation part for operating each heating means is provided in the front part opposite to each heating means. Compared to the above, the position of the operation part of each heating means can be visually recognized by the user in an easy-to-understand manner by disposing it on the back side toward the product.

  Also, by providing a top plate holding part on the back of the top plate, providing a light guide plate, a holder for holding the light emitting part, the control circuit part, and the contact terminal part, and locking the holder to the top plate holding part. The positions of the conductive display unit, the light guide unit, and the light emitting unit can be fixed with high accuracy.

  As described above, the induction heating cooker according to the present invention is guided by light so that the location to be operated can be easily identified, and the height of the top surface of the top plate is made as low as possible from the cabinet, so that it is frequently used in actual use. By placing the high switch part in front of the top plate, it can be operated easily and easily by anyone, away from the heating part, and it is easy to use and has excellent durability. The present invention can also be applied to uses such as a type heating cooker and a built-in or stationary gas cooker.

Overall configuration schematic diagram of induction heating cooker in the first embodiment of the present invention Sectional drawing of the principal part of the operation part of the induction heating cooking appliance in the 1st Embodiment of this invention The assembly state figure of the cabinet of the induction heating cooking appliance incorporated in the cabinet in the 1st embodiment of the present invention, and a main part outer shell case The positional relationship figure of the heating part of the induction heating cooking appliance in the 1st Embodiment of this invention, a display part, and an operation part The enlarged view of the unit which comprises the display part and operation part of the induction heating cooking appliance in the 1st Embodiment of this invention. The attachment figure of the unit which comprises the display part and operation part to the top unit of the induction heating cooking appliance in the 1st Embodiment of this invention Operational operation state diagram of induction heating cooker in the first embodiment of the present invention Schematic configuration of conventional operation switch

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Cabinet 12 Opening hole 13 Top plate 14 Top plate holding part 15 Top frame 16 Main body outer case 17 Frame part 18 Right heating coil 19 Left heating coil 20 Radiant heater 21 Right display part 22 Right operation part 23 Left display part 24 Left Operation unit 25 Central display unit 26 Central operation unit 27 Symbol display 28 Conductive film 29 Conductive display unit 30 Hidden printing film 31 Light guide plate 32 Diffusion unit 33 Reflector plate 34 Opening portion 35 Light emitting unit 36 Light shielding member 37 Control circuit unit 38 Contact terminal 39 Parts holder 40 Holder 41 Main circuit section

Claims (10)

In an induction heating cooker comprising an induction heating means having an induction heating coil, a top plate provided above the induction heating means on which an object to be heated is placed, and an operation unit provided on the top plate, For the light-transmitting top plate disposed on the upper surface of the main body, the conductive display portion formed of a non-light-transmitting conductive film on the back surface of the top plate, and the symbol display that facilitates one operation. A light guide plate larger in the outer peripheral direction than the projected shape of the symbol display that prompts one operation of the conductive display portion provided immediately below the conductive display portion disposed at least one, and a light shielding member provided on the outer periphery of the light guide plate A light emitting portion disposed on a side end surface portion of the light guide plate, a control circuit portion to which the light emitting portion disposed below the light guide plate and the light emitting portion is connected, and an end portion of the conductive display portion Or a contact terminal connected to the control circuit unit made of a conductive material disposed on the outside of the light emitting unit and the light guide plate, while contacting a part of the conductive display unit extended with a conductive film. And an induction heating cooker having the operation unit for operating the top plate surface opposed to the symbol display, which is composed of a capacitance type touch detection unit provided in the control circuit unit and prompts the operation of the conductive display unit . Forming a concealed printing film having a darker color than the conductive display unit for concealing the conductive display unit between the upper surface of the light transmissive top plate or the conductive display unit on the back surface of the top plate, and performing the concealment printing 2. The induction heating cooker according to claim 1, wherein the film has a light-transmitting property that causes the conductive display portion on the back surface of the top plate to float by light guided by the light guide plate when the light emitting portion emits light. Providing a frame part that protrudes from the outer peripheral surface of the main body outer casing that enters the opening of the cabinet into which the main body is incorporated and that is at least partially overlapped with the upper surface of the cabinet, and at least part of the conductive display part on the back surface of the top plate A position where at least a part of the light guide plate provided immediately below the conductive display part overlaps the upper surface of the frame part, and a light emitting part, a contact terminal, and a control circuit part are provided in a main body outer casing that enters the opening of the cabinet, The induction heating cooker according to claim 1, wherein one end of the light guide plate extends to the light emitting portion. The induction heating cooker according to claim 3, wherein a light emitting part is arranged at one end of the light guide plate bent downward in the outer casing of the main body that has entered the opening of the cabinet. The induction heating cooker of Claim 1 which formed the diffusion part in the lower surface of the opposing light-guide plate directly under an electroconductive display part. The induction heating cooker according to claim 3, wherein the frame portion is grounded, and the opposed frame portion directly below the conductive display portion is provided with an opening that is larger in the outer peripheral direction than the projected shape. The induction heating cooker according to claim 1, wherein a reflector made of a white resin or a coated steel plate is provided on the lower surface of the light guide plate. 2. The induction heating according to claim 1, wherein one light guide plate and one light emitting portion are arranged for each display of a symbol display that prompts one operation of the conductive display portion, and the light guide plates are separated by a light shielding member. Cooking device. Heating means are provided in two places on the left and right front and one place in the center back, and an operation part for operating each heating means is provided in the front part opposite to each heating means. The central operation part is compared with the left and right operation parts. The induction heating cooker according to claim 1, wherein the induction heating cooker is arranged on the back side of the product. A top plate holding part is provided on the back surface of the top plate, a light guide plate, a holder for holding all of the light emitting part, the control circuit part, and the contact terminal part are provided, and the holder is locked to the top plate holding part. The induction heating cooker according to claim 1.

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