JP5109914B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker.

  Conventionally, in this type of heating cooker such as an induction heating cooker, a top plate made of heat-resistant glass is provided on the upper part of a housing that houses a plurality of heaters, induction heating coils, an inverter circuit, and a control unit of the inverter circuit. It has been. The user of the heating cooker places a cooking container for cooking by heating at a predetermined position indicated by, for example, a circle on the top plate. In a general product, three predetermined positions are indicated by respective circles so that three cooking containers can be heated simultaneously. The switches that the user operates to turn on / off the heating cooker, adjust the amount of heat, etc., as well as the indicator lamp and display to indicate the usage status are on the front of the housing (facing the user) It is attached to the operation panel provided on the surface. There is a fixed type operation panel that is fixed to a surface perpendicular to the top plate on the front surface of the housing. Since the fixed operation panel is perpendicular to the top plate and below the top plate, when operating the switches on the operation panel or checking the display, the user must bend the upper body and hold the operation panel. It is necessary to look into it. For this reason, there was a problem in terms of operability.

  As an improved version of the fixed operation panel, there is a rotary storage type operation panel in which an operation panel is attached to a small rotatable box and incorporated in a front portion of a casing. This rotary storage type operation panel is excellent in that it does not get in the way of the user during storage because it is extended forward when necessary and stored in the back of the housing when unnecessary. However, it may get in the way because it protrudes forward during use. Therefore, the user comes to use the rotary storage type panel by pulling out and operating it only when necessary during cooking, and storing it immediately after the operation is completed. Such usage is complicated, and this type of operation panel has a problem in terms of operability.

  In order to solve the above problems, an operation switch and a display body are provided in an end region close to the user of the top plate (hereinafter, referred to as a front portion of the top plate), and when the operation switch can be operated, a backlight unit is provided around the operation switch. The prior art which improved the usability which is made to illuminate and let a user know the "operable state" is disclosed (for example, refer patent document 1).

  According to this prior art, as shown in FIGS. 21 and 22, the upper surface operation unit 2 is provided in the central region of the front portion of the top plate 1, and the upper surface operation unit 2 is the top plate 1 for the user to operate. The operation pads 3 to 8 are provided. On the housing 9 side, an operation circuit section 10 connected to the upper surface operation section 2 when the top plate 1 is attached to the housing 9 is provided. The operation circuit unit 10 also includes a display unit that displays the operating state of the heating region. In the housing 9, heating bodies (heating units) 11 such as a radiant heater and an induction heating coil of each heating region are disposed below the top plate 2. The heating body 11 is connected to an inverter unit 13 controlled by the control unit 12. When the heating element 11 is an induction heating coil, high frequency power having a frequency of 20 kHz to 50 kHz is supplied from the inverter unit 13. When the induction heating coil is used, since the induction heating coil is disposed under the pan 14 via the top plate 1, the heating area and the operation area can be made the same plane. For this reason, a cooking device with improved operability such as easy cleaning of the top plate surface and less risk of erroneous operation can be obtained. The operation circuit unit 10 is connected to the control unit 12, and a signal generated by a user operation is applied to the control unit 12. Further, from the control unit 12, a display signal indicating the operating state of the heating region is applied to the display unit of the operation circuit unit 10.

A temperature sensor 15 that detects the temperature of the pan 14 and a pan detector 16 that detects the presence or absence of the pan 14 are provided in the heating regions of the top plate 1, respectively, and are connected to the control unit 12. The control unit 12 and the inverter unit 13 are connected to, for example, an AC 200V AC power source and supplied with AC power.

  The operation pads 3, 4, 5, 6, 7, and 8 are conductive films provided on the upper surface 1 </ b> A of the top plate 1. The operation pads 3 to 8 are referred to as “operation areas” because the operation pads 3 to 8 are areas that the user touches with the fingers in order to operate the heating body 11 in the heating area (two heating bodies: not shown for cross-sectional view). The operation pads 3 to 8 are formed of, for example, a conductive film such as a conductive ink or paint coating film or a screen printing film, or a metal vapor deposition film. The characters / on are printed. The operation pads 3 to 5 are for turning on / off the left heating region and adjusting the heating power, and the operation pads 6 to 8 are for turning on / off the right heating region and adjusting the heating power. Is. The operation pads 4 and 7 are “OFF / ON” switches for starting heating by the heating region.

  The top plate 1 has a transparent portion 17 composed of two semicircles and four rod-like regions surrounding the operation pads 3 to 5 and a similar transparent portion 18 similarly surrounding the operation pads 6 to 8. A rectangular transparent portion 19 is also provided above the transparent portions 17 and 18, and the fire power and the like are displayed by LEDs or the like.

  The connection parts 20-25 are connected to the detection parts 26-31 via the respective connection conducting wires 20A-25A. The detection units 26 to 31, the connecting conductors 20 </ b> A to 25 </ b> A, and the connection units 20 to 25 are conductive films formed on the lower surface 1 </ b> B of the top plate 1, respectively. It is formed of a film.

Under each operation pad, there are provided backlight portions 32 and 33 for emitting illumination light upward. When the housing 9 and the top plate 1 are combined, the backlight portion 32 overlaps the transparent portion 17 and the backlight portion 33 overlaps the transparent portion 18. The backlight units 32 and 33 are lit when the heating area is in an “operable state”, and illuminate the operation pads 3 to 5 and the surroundings of the operation pads 6 to 8. This informs the user that the heating area is in an “operable state”.
JP 2003-272816 A

  However, in the above-described conventional configuration, the backlights 32 and 33 are used to illuminate the periphery of the operation pads 3 to 8 in order to inform the user of the heating region “operable state”. The parts 17 and 18 are conspicuous, and due to the difference in illuminance from the operation pads 3 to 8, it becomes difficult to see characters such as turning on / off of the operation pads 3 to 8, and the connection parts 20 to 25 and the detection parts 26 to 31. Since the connecting conductors 20A to 25A that connect the two cross the transparent portions 17 and 18, the transparent portions 17 and 18 that are emitting light are divided, and there is a problem that the design also retreats.

  The present invention solves the above-described conventional problems, and provides an operation portion such as a heating power adjustment of a heater on a convenient top surface portion, and remarkably improves visibility by causing each operation button itself to emit light, Furthermore, it is intended to provide a cooking device that can be further improved in ease of use by letting the user know by illuminating only the operation buttons that can be operated, and that is excellent in design. To do.

  It is another object of the present invention to provide a cooking device in which a light emitting unit having a stable luminance is provided at a low cost in a thin space of an operation unit of the cooking device.

In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a top plate of a plate-like member having electrical insulation provided on an upper surface of a housing, a heating unit that heats an object to be heated, and the heating Connected to the control unit for controlling the unit, the operation region set on the top surface of the top plate, a plurality of conductor detection units provided in the operation region on the back surface of the top plate, and the conductor detection unit A conductor connection portion provided; a connection terminal that contacts the conductor connection portion to electrically connect the conductor detection portion and the control portion; and a terminal holder that holds the connection terminal and is provided in the control portion. And a light emitting substrate provided with a light emitting element, a vertical wall and a top surface are formed in an approximately L shape, a light incident portion is provided at an end of the vertical wall, and a planar light emitting portion is provided on the top surface. A substantially L-shaped protective frame proximate to the light guide, and the protective frame. An opening provided in the portion of the planar light emitting portion of the frame, the pawl teeth provided on the protective frame, the reflection sheet substantially L-shaped provided, wherein the upper surface side of the top surface of the light guide vertical one side of the wall is in contact with the protective frame, said the surface not in contact with the protective frame of the vertical wall of the light guide body provided with the light emitting substrate, a lower surface side of the top surface of the light guide, and the The light emitting substrate on the side of the vertical wall that does not come into contact with the protective frame constitutes a backlight unit having a configuration in which a reflective sheet is provided, and the claws provided on the protective frame of the backlight unit are fitted into the terminal holder. And fixed.

  As a result, since each of the operation buttons emits light, the visibility is remarkably improved and the usability can be further improved.

  The cooking device of the present invention can be further improved in usability and can be excellent in design.

According to a first aspect of the present invention, there is provided a top plate of an electrically insulating plate-like member provided on an upper surface of a housing, a heating unit that heats an object to be heated, a control unit that controls the heating unit, An operation region set on the upper surface, a plurality of conductor detection units provided in the operation region on the back surface of the top plate, a conductor connection unit provided connected to the conductor detection unit, and the conductor connection A connection terminal for contacting the conductor and electrically connecting the conductor detection unit and the control unit, a terminal holder for holding the connection terminal and provided in the control unit, a light emitting substrate provided with a light emitting element, A light guide body in which a wall and a top surface are formed in a substantially L shape, a light incident portion is provided at an end of the vertical wall, and a planar light emitting portion is provided on the top surface, and the light guide body is in proximity A substantially L-shaped protective frame, and an opening provided in the planar light emitting portion of the protective frame A pawl tooth provided on the protective frame, the reflection sheet substantially L-shaped is provided, one side of the upper surface side of the top surface of the light guide wherein the vertical wall is in contact with the protective frame, the light guide The light emitting substrate is provided on a surface of the vertical wall that does not contact the protective frame, and the light emitting substrate is provided on the lower surface side of the top surface of the light guide and on the side of the vertical wall that does not contact the protective frame. Constitutes a backlight unit with a structure provided with a reflection sheet, and the claw b provided on the protective frame of the backlight unit is fixed by fitting with the terminal holder, so that the light from the light emitting element is A stable lighting display can be displayed on the display portion of the top plate through one integrated light guide.

  According to a second aspect of the present invention, a diffusion sheet is provided on the top of the planar light emitting portion on the top surface of the light guide, and the light is transmitted even if the reflection performance of the reflection sheet is not excellent due to the configuration attached to the opening of the protective frame. Since the diffusion sheet can diffuse and emit light, light unevenness can be suppressed.

  In addition, even if a hot frying pan or the like is placed on the top plate above the light guide, heat is shielded by the diffusion sheet, so that high heat can be prevented from being transmitted to the light guide, so the light guide is a material with a low heat resistance temperature. Can be used, and material costs can be reduced.

A third invention is the lower surface side of the top surface of the light guide provided with a planar light-emitting portion, wherein the opposite upper surface to said planar light emitting portion of the top surface to provide a diffusion sheet, the opening of the protective frame With the structure attached to the light, even if the reflective sheet has a low reflective performance, light can be diffused and emitted from the diffusion sheet, so that uneven light can be suppressed.

  According to a fourth aspect of the present invention, a plurality of light guides are formed in different colors, attached to a protective frame, and caused to emit light, thereby changing the color of an important operation button (for example, “OFF / START” button). Therefore, the user can easily recognize the operability, and the operability can be greatly improved.

  In the fifth aspect of the invention, a plurality of light emitters are provided in different colors, attached to a protective frame, and caused to emit light, thereby changing the color of an important operation button (for example, “OFF / START” button). Can be recognized more easily by the user, and the operability can be greatly improved.

  According to a sixth aspect of the present invention, the color of an important operation button (for example, “OFF / START” button) is obtained by causing an arbitrary frame (operation button) to emit light in different colors by sandwiching different color filters on a plurality of diffusion sheets. By changing the value, the user can recognize it more easily, and the operability can be greatly improved.

  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: shows the external appearance perspective view of the induction heating cooking appliance which is a heating cooking appliance in the 1st Embodiment of this invention.

  As shown in FIG. 1, the induction heating cooker according to the present embodiment has three heating units 41 </ b> A, 41 </ b> B for heating the bottom surface of the cooking container in the top plate unit 41 for placing the cooking container on the upper surface of the apparatus. 41C and upper surface operation part 41D are provided. On the front side of the device, a retractable front operation unit 42, a power switch 42A, and a grill door 43 are provided. The retractable operation unit 42 is a kangaroo type and is shown in a state of being housed in FIG.

  In the state of FIG. 1, an operation surface (not shown) on which a plurality of operation keys are arranged appears by rotating to the front by pressing the upper part of the panel of the retractable operation unit 42. The grill door 43 is a door for opening and closing a grill (not shown) for inserting and grilling raw fish stored in the apparatus.

  When a food material is put in a cooking container (not shown) and cooked by the induction heating cooker according to the present embodiment, the cooking container (not shown) is placed on the heating unit 41A, 41B or 41C and induction heating is performed. Turn on the power switch 42 of the cooker.

  Further, when the heating operation is instructed by operating the upper surface operation unit 41D or the front operation unit 42, the control means (not shown) sends a high frequency to the heating coil (not shown) via the inverter power supply (not shown). Supply current. When a high-frequency current is supplied to the heating coil, the heating coil generates an alternating magnetic field, and the cooking container is heated by induction, so that the temperature rises. Here, the operations of the heating units 41A and 41B are performed by the upper surface operation unit 41D, and the operation of the oven behind the heating unit 41C and the grill door 43 is performed by the front operation unit 42. However, the present invention is not limited thereto. It is possible to similarly configure the operation of 41C and the oven with the upper surface operation unit 41D.

  Next, the structure of the induction heating cooker according to the present embodiment will be described with reference to FIGS.

FIG. 2 is a plan view of the top plate unit 41 of the induction heating cooker according to the first embodiment of the present invention, and shows a state in which the operation button display is lit on the upper surface operation unit 41D.

  Here, the upper surface operation unit 41D performs printing with transparency so as to transmit light when irradiated from below the top plate.

  FIG. 3 shows a rear view of the top plate unit 41 of the induction heating cooker in the first embodiment of the present invention, and FIG. 4 shows the induction heating cooker in the first embodiment of the present invention. The principal part enlarged back view of the back surface of the top plate unit 41 is shown.

  In FIG. 4, a plurality of electrode prints 45 for displaying each operation button are provided on the back surface of the upper surface operation unit 41 </ b> D of the top plate 41. Printing other than the plurality of electrode prints 45 of the upper surface operation unit 41D is printed to block light. The electrode print 45 includes a contact part 45A, conductive parts 45B and 45C, a touch part 45D, a non-printed frame part 45E, and a character part 45F.

  Here, the contact portion 45A, the conductive portions 45B and 45C, and the touch portion 45D that have undergone electrode printing do not transmit light, and the frame portion 45E and the character portion 45F that are not printed transmit light. As a result, the light passes through only the unprinted frame portion 45E and the character portion 45F, so that the operation buttons are displayed when the light is lit.

  When the upper surface of the top plate above the touch part 45D is touched with a finger, the conductive parts 45B and 45C are connected to the contact part 45A, and the voltage value of the capacitance of the contact part 45A changes.

  FIG. 5 shows a perspective view of the main body from which the top plate unit 41 of the induction heating cooker according to the first embodiment of the present invention is removed, and there are heating coils 47A, 47B and 47C in the outer shell 46, The operation unit 48 is attached in front of the heating coils 47A and 47B.

  When the heating operation is instructed by operating the upper surface operation unit 41D, the operation unit unit 48, and the front operation unit 42, the control means (not shown) is heated by the heating coils 47A and 47B via the inverter power supply (not shown). And 47C are supplied with a high-frequency current. When a high-frequency current is supplied to the heating coil, the heating coil generates an alternating magnetic field, and the cooking container is heated by induction, so that the temperature rises.

  FIG. 6 shows a perspective view of the operation unit unit 48 of the induction heating cooker in the first embodiment of the present invention, and FIG. 7 shows the induction heating cooker in the first embodiment of the present invention. The perspective view which removed display sheet 49A, 49B, and 49C and the backlight unit 50 by the operation part unit 48 is shown.

  7, the operation unit 48 includes an operation unit case 51, display substrates 52A and 52B disposed in the operation unit case 51, holders 53A, 53B and 53C attached to the display substrates 52A and 52B, and a holder 53A. And a plurality of contact terminals 54 attached to the display substrates 52A and 52B, a backlight unit 50 attached to the holders 53A and 53B by nail fitting, and a display sheet adhered to the holders 53A, 53B and 53C 49A, 49B, and 49C.

Here, a plurality of LEDs (not shown) for displaying the thermal power when the operation unit 48 is induction-heated are attached to the display substrates 52A and 52B, surrounded by the holders 53A and 53B, and the upper surfaces of the holders 53A and 53B. Is covered with display sheets 49A and 49B to display the thermal power.

  The tip of each contact terminal 54 is in contact with the contact portion 45A of the electrode printing 45 on the top plate so that when the voltage value of the capacitance of the contact portion 45A changes, the lighting / extinction of the backlight unit 50 changes. It has become.

  FIG. 8 shows a state in which the backlight unit 50 is attached to the holder 53A by nail fitting with the holder 53A and the plurality of contact terminals 54 attached to the display substrate 52A in the first embodiment of the present invention. FIG. 9 shows a state where the backlight unit 50 in the first embodiment of the present invention is detached from the holder 53A.

  8 and 9, when the backlight unit 50 is attached to the holder 53A, the boss 53A-1 provided on the holder 53A is inserted into the hole 50-1 of the backlight unit to lock the holder 53A. Claws 53A-2 and the pawls 50-2 for locking the backlight unit 50 are engaged and fixed. Here, when the locking nail 53A-2 for holding the holder 53A and the locking nail 50-2 for the backlight unit 50 are bent, the backlight unit 50 can be easily detached from the holder 53A. .

  10 and 11 show perspective views from above and below of the backlight unit 50 in the first embodiment of the present invention, and FIG. 12 shows the back in the first embodiment of the present invention. FIG. 13 shows a perspective view in which the components constituting the light unit 50 are separated, and FIG. 13 shows a state in which only the protective frame 55 is removed from the backlight unit 50 in the first embodiment of the present invention. It is.

  10 to 13, the backlight unit 50 includes light guides 56 </ b> A and 56 </ b> B of different sizes attached to a protective frame 55, a light emitting substrate 57 provided with a light emitting element 57 </ b> A, and a substantially L-shaped reflection sheet 58. It is the structure which provided.

  The light guide 56A is formed of a vertical wall 56А-1, a slope 56A-2, and a top surface portion 56А-3. Similarly to the light guide 56A, the light guide 56B is formed of a vertical wall 56B-1, a slope 56B-2, and a top surface portion 56B-3. However, although it is the structure which combined several vertical wall 56B-1, the progress of light is the same as that of the light guide 56A. Moreover, the planar light emission part 59 is given to the top | upper surface part 56A-1 and the top | upper surface BU56B-1.

  Here, the light emitting element 57A is in contact with or close to the vertical walls 56А-1 and 56B-1.

  A plurality of openings are provided in the protective frame 55, and light guides 56 </ b> A and 56 </ b> B are attached to the protective frame 55 so that the planar light emitting unit 59 fits in the openings. The light emitting substrate 57 is attached to the holding frame 55 so that the light emitting element 57A is in contact with or close to the vertical walls 56А-1 and 56B-1. Further, the light emitting substrate 57 is provided with a latch by a claw 55-3 of the protective frame 55.

  FIG. 14 is a cross-sectional view of the backlight unit 50 according to the first embodiment of the present invention. FIG. 15 is a partial cross-sectional view of the backlight unit 50 according to the first embodiment of the present invention, and illustrates the direction in which light from the light emitting element 57A travels inside the light guide 56A.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, when the power switch 42 of the induction heating cooker is pressed, the backlight unit 50 is turned on, and an operation button is formed by the unprinted frame portion 45E and the character portion 45F of the electrode print 45 provided on the back surface of the top plate. Lights up.

  When the upper surface of the top plate of the operation button that is lit and displayed is touched with a finger, the voltage value of the capacitance of the touch portion 45D on the lower surface of the top plate of the operation button changes, and the touch portion 45D The voltage value of the contact portion 45A also changes through the connected conductive portions 45B and 45C. A signal indicating that the operation button has been touched is also transmitted to the display substrates 52A and 52B via the contact terminal 54 that contacts the contact portion 45A, and the light emitting element 57A and a plurality of LEDs for displaying the thermal power (see FIG. (Not shown) can be turned on / off, and induction heating to the heating coil can be controlled.

  Here, the backlight unit can be mounted on the holder without adhesion such as adhesion or screw tightening, and the assembling property can be improved and the manufacturing cost can be reduced.

  In addition, the backlight unit integrates the light-emitting substrate including the light-emitting element and the light guide, so that the distance between the light incident portion of the vertical wall of the light guide and the light-emitting element is reduced, thereby eliminating variations in distance. Therefore, the brightness of each light guide can be made constant.

  In addition, the light of the light emitting element enters the inside of the vertical wall of the light guide, is reflected by the inclined surface, and the light refracted by the light emitting part forming a surface shape at the top surface part is reflected by the reflecting sheet, and the top plate The top surface of the light guide and the reflection sheet are also integrated, so the top surface and the reflection sheet are in uniform contact with each other, preventing light unevenness from occurring. The brightness can be kept constant, and the operation buttons can be lit uniformly.

  Furthermore, by changing the color of some of the light emitting elements, it is possible to increase the recognition of the operation buttons, for example, the “OFF / START” button is the most easily recognized and can increase safety. .

  In addition to distinguishing colors with a plurality of light-emitting elements, the same effect can be obtained by changing a part of colors with a plurality of light guides.

(Embodiment 2)
FIGS. 16-18 shows the perspective view and sectional drawing of the backlight unit of the induction heating type cooking appliance which is a heating cooking appliance of the 2nd Embodiment of this invention.

  FIG. 16 is a perspective view in which components constituting the backlight unit 60 in the second embodiment of the present invention are separated, and a protective frame 61 and light guides of different sizes attached to the protective frame 61. 62A and 62B, planar light emitting parts 63A and 63B provided on the top surfaces of the light guides 62A and 62B, a diffusion sheet 64A mounted on the protective frame 61 and mounted on the planar light emitting parts 63A and 63B 64B, a light emitting substrate 65, and a substantially L-shaped reflection sheet 66 are provided.

  FIG. 17 shows a cross-sectional view of the backlight unit 60 in the second embodiment of the present invention, and FIG. 18 is a partial cross-sectional view of the backlight unit 60 in the second embodiment of the present invention. Yes, the path of light from the light emitting element 67 is depicted.

  With this configuration, light from the light emitting element is refracted by the planar light emitting portion and reflected by the reflecting sheet. However, if the surface roughness of the reflecting sheet is not uniform, the unit price is reduced, but light unevenness is caused. Occurred.

  However, even if the light reflected by the reflection sheet is uneven, the uneven light can be eliminated by the diffusion sheet provided on the upper surface of the light guide, and the operation button can be lit uniformly.

  Moreover, the unit price can be reduced by increasing the roughness of the reflection sheet.

  Furthermore, the recognizability of the operation buttons can be changed by changing the color of the diffusion sheet.

(Embodiment 3)
FIG.19 and FIG.20 shows sectional drawing and principal part sectional drawing of the backlight unit of the induction heating type cooking appliance which is a heating cooking appliance of the 3rd Embodiment of this invention.

  In FIG. 19, the backlight unit 70 includes a protective frame 71, a light guide 72 attached to the protective frame 71, a planar light emitting unit 73 on the lower surface side of the top surface of the light guide 72, and the top of the light guide 72. A diffusion sheet 74 mounted on the upper surface of the surface portion and attached to the protective frame 71, a light emitting substrate 75, and a substantially L-shaped reflection sheet 76 are provided.

  FIG. 20 is a partial cross-sectional view of the backlight unit 70 and depicts the path of light from the light emitting element 76.

  By making the light emitting part on the lower surface side of the top surface of the light guide, there is no reflection on the reflection sheet, and the light is brilliant and bright, but the diffusion sheet reduces the brightness and makes it easy to see In addition, the grade of the reflective sheet can be lowered, and the unit price of the reflective sheet can be lowered.

  As described above, the heating cooker according to the present invention can significantly improve the visibility of the operation buttons, and can greatly improve the design and the usability. Therefore, the induction heating type having the operation portion on the top plate. The present invention can be applied to any combination of simple and complex cookers including a heater.

External appearance perspective view of the heating cooker in the 1st Embodiment of this invention The top view of the top plate unit of the heating cooker in the 1st Embodiment of this invention The top view of the back surface of the top plate unit of the heating cooker in the 1st Embodiment of this invention The principal part enlarged plan view of the top plate unit of the heating cooker in the 1st Embodiment of this invention The perspective view which removed the top plate unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the operation part unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the operation part unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the operation board unit and backlight unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the operation board unit and backlight unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the backlight unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the backlight unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the backlight unit of the heating cooker in the 1st Embodiment of this invention The perspective view of the backlight unit of the heating cooker in the 1st Embodiment of this invention Sectional drawing of the backlight unit of the heating cooker in the 1st Embodiment of this invention The principal part expanded sectional view of the backlight unit of the heating cooker in the 1st Embodiment of this invention. The perspective view of the backlight unit of the heating cooker in the 2nd Embodiment of this invention Sectional drawing of the backlight unit of the heating cooker in the 2nd Embodiment of this invention The principal part expanded sectional view of the backlight unit of the heating cooker in the 2nd Embodiment of this invention. Sectional drawing of the backlight unit of the heating cooker in the 3rd Embodiment of this invention The principal part expanded sectional view of the backlight unit of the heating cooker in the 3rd Embodiment of this invention. Cross-sectional view of a conventional cooking device The main part enlarged plan view of the operation part of the conventional cooking device

Explanation of symbols

41 Top plate unit 41A, 41B, 41C Heating part 41D Upper surface operation part 45 Electrode printing 45A Contact part 45A
45B Conducting part 45C Conducting part 45D Feeling part 45E Printed frame part 45F Character part 46 Outline 47A, 47B, 47C Heating coil 48 Operation part unit 49A, 49B, 49C Display sheet 50 Backlight unit 51 Operation part case 51
52A, 52B Display board 53A, 53B, 53C Holder 54 Contact terminal 53A-1 Boss 50-1 Hole 53A-2 Claw I 50-2 Claw B 55 Protection frame 56A, 56B Light guide 57A Light emitting element 57 Light emitting board 57
58 Reflective sheet 56A-1, 56B-1 Vertical wall 56A-2, 56B-2 Slope 56A-3, 56B-3 Top surface portion 59 Planar light emitting portion

Claims (6)

A top plate of a plate-like member having electrical insulation provided on the upper surface of the housing, a heating unit for heating an object to be heated, a control unit for controlling the heating unit, and an operation region set on the upper surface of the top plate A plurality of conductor detectors provided in the operation area on the back surface of the top plate, a conductor connector provided connected to the conductor detector, and the conductor connector contacting the conductor connector A connection terminal that electrically connects the body detection unit and the control unit, a terminal holder that holds the connection terminal, is provided in the control unit, a light emitting substrate that is provided with a light emitting element, and a vertical wall and a top surface are approximately A light guide formed in an L shape, provided with a light incident portion at the end of the vertical wall and provided with a planar light emitting portion on the top surface, and a substantially L shape adjacent to the light guide. and protective frame of the opening provided in the portion of the planar light emitting portion of the protective frame, the protective frame Provided a pawl tooth has a reflecting sheet of the substantially L-shaped is provided, one side of the upper surface side of the top surface of the light guide wherein the vertical wall is in contact with the protective frame, said vertical wall of the light guide The light emitting substrate is provided on a surface that does not contact the protective frame, and a reflective sheet is provided on the lower surface side of the top surface of the light guide and the light emitting substrate on the side that does not contact the protective frame of the vertical wall. A heating cooker having a configuration in which a claw b provided on the protective frame of the backlight unit is fitted and fixed to the terminal holder. The cooking device according to claim 1, wherein a diffusion sheet is provided on an upper portion of the planar light-emitting portion on the top surface of the light guide and is attached to the opening of the protective frame. A structure in which a planar light emitting portion is provided on the lower surface side of the top surface portion of the light guide, a diffusion sheet is provided on an upper surface of the top surface opposite to the planar light emitting portion, and attached to the opening of the protective frame. The heating cooker according to 1. The cooking device according to any one of claims 1 to 3, wherein the plurality of light guides are formed in different colors and attached to a protective frame to emit light. The cooking device according to any one of claims 1 to 3, wherein the plurality of light emitters are provided in different colors and attached to a protective frame to emit light. The cooking device according to any one of claims 1 to 3, wherein the plurality of diffusion sheets cause an arbitrary frame (operation button) to emit light in different colors by sandwiching different color filters.

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