JP2006125645A - Top plate for cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a top plate for a cooker free from false recognition of a number displayed by LED while making invisible the inside of a cooker such as wiring of the LED or the like from a non-formation area of a light shielding film corresponding to the arrangement of an indicator composed of the LED. <P>SOLUTION: This top plate 1 for the cooker has a formation portion and the non-formation portion of the light shielding film on a rear face of a transparent glass plate 2, and a light-emitting element 7 is mounted at a lower portion of the non-formation portion. A colored plate body 5 through which light ray of the light-emitting element transmits, is mounted on the rear face of the transparent glass plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooker top plate, and more particularly to a cooker top plate in which a colored glass plate is attached to the back side of a glass plate made of crystallized glass or the like.

  In recent years, an infrared cooking device using a radiant heater or a halogen heater, or IH, as a cooking device for home use or business use, instead of or together with a conventional gas cooking device using a gas stove, etc. Electromagnetic cooking devices have been used.

  As a top plate used in this infrared heating cooker or electromagnetic heating cooker, a colored low expansion crystallized glass having a light shielding property against visible light (for example, GC-190 manufactured by Nippon Electric Glass Co., Ltd. Selan) or a glass plate (substrate) made of colorless low expansion crystallized glass (N-0 manufactured by Nippon Electric Glass Co., Ltd.) excellent in translucency for visible light is used.

  On the other hand, with respect to the top plate used in these cookers, an indicator made up of a liquid crystal or light-emitting diode is visibly arranged in response to a request that the user can grasp the temperature and heating power at a glance from the surface side. The installed one has been prototyped or is being used.

  Specifically, as a top plate, a glass plate made of colorless, low-expansion crystallized glass excellent in translucency is used as a substrate so that the back surface can be clearly seen from the front surface side, and on the back surface side of the glass plate An indicator composed of the above-described liquid crystal or light emitting diode (LED) is disposed.

  In that case, in the region excluding the liquid crystal and indicator arrangement portions on the glass plate, a light shielding film is formed on at least one side of the front and back surfaces of the glass plate, for example, the back surface so that the internal structure of the cooking device such as a heating device and wiring can be concealed. However, this light-shielding film may not form a light-shielding film even for an infrared heating part (radiant heater part) in a glass plate because of its low heat resistance and easy heat generation. It will be advantageous.

  By the way, in this kind of top plate, as a method of forming the light shielding film on the surface of the transparent low-expansion glass so as to conceal the internal structure of the cooker, the light shielding film is formed by a printing method or a sputtering method. It is customary that a typical vapor deposition method is employed.

  As specific examples of the printing method, the following Patent Document 1 and Patent Document 2 disclose a top plate in which a light shielding film made of glass and an inorganic pigment is formed on the surface of a substrate made of transparent low expansion crystallized glass. ing. Since this light-shielding film has a higher thermal expansion coefficient than a substrate made of low-expansion crystallized glass, the occurrence of cracks in the film is suppressed by taking a measure of forming it porous.

  As another specific example of the printing method, the following Patent Document 3 discloses a top plate in which a raster-colored film made of a noble metal and a base metal is provided on the surface of a substrate made of a transparent low expansion crystallized glass. Has been.

Further, as a specific example of the vapor deposition method, the following Patent Document 4 was selected from a metal, an alloy, a metal nitride, and an alloy nitride on the surface of a substrate made of transparent low expansion crystallized glass. A top plate in which a light shielding film containing one component is formed by a vapor deposition method is disclosed. This light-shielding film has an advantage that it is difficult to peel off from the glass plate because of its high adhesion to the glass plate as compared with the printing method.
Japanese Patent Laid-Open No. 10-273342 JP 2003-168548 A Japanese Patent Publication No. 7-17409 WO03 / 098115 pamphlet

  However, when forming the light-shielding film (colored light-shielding film) described in Patent Documents 1 to 4, it is easy to see the indicator display in the area corresponding to the arrangement of the indicator composed of the LEDs described above. The light shielding film is not formed. Therefore, in this case, there is a problem that the inside of the cooking device such as the wiring of the LED can be seen through the region where the light shielding film is not formed, in addition to the light emitted from the LED. Further, in the case of an LED for displaying numbers such as temperature and timer, it is difficult to distinguish between a portion where the LED is shining and a portion where the LED is not shining, and there is a possibility that the number is misidentified.

  The present invention has been made in view of the above circumstances, and the inside of the cooking device such as the wiring of the LED is not visible from the non-forming region of the light shielding film corresponding to the arrangement of the indicator made of the LED, and is displayed by the LED. An object of the present invention is to provide a top plate for a cooker that does not misrecognize the numbers.

The top plate for a cooker of the present invention made to solve the above technical problem has a light-shielding film forming part and a non-forming part on the back surface of a transparent glass plate, and a light emitting element is arranged below the non-forming part. A top plate for a cooking appliance,
A colored plate-like body that transmits the light rays of the light-emitting element is attached to the back surface of the transparent glass plate.

  According to such a configuration, the colored plate-like body that transmits the light beam of the light emitting element can be used to cook the wiring of the light emitting element from the non-light-shielding film formation region corresponding to the arrangement of the indicator (light emitting element) made of LED. The inside of the container is not visible, and the number displayed on the LED is not mistaken. That is, the plate-like body attached to the back surface of the glass plate so as to cover the light emitting element display portion transmits light rays (for example, red or orange light rays) of the light emitting elements and is colored, and thus emits light. This is because almost no visible light other than the light emitted from the element is transmitted. Further, in the case of an LED for displaying numbers such as temperature and timer, since only the portion where the LED is shining can be recognized from the upper surface of the top plate, there is no possibility of misidentifying the numbers.

  In this case, the “transparent glass plate” means a glass plate that is colorless or colored, but transmits visible light well, for example, the average transmittance of visible light having a wavelength of 400 to 800 nm is 50% or more.

  In the above configuration, the colored plate-like body preferably has an average transmittance of visible light having a wavelength of 600 to 800 nm of 10% or more and an average transmittance of visible light having a wavelength of 400 to 600 nm of 8% or less. Further, the average transmittance of visible light having a wavelength of 600 to 800 nm is more preferably 15% or more. Moreover, it is more preferable that the average transmittance of visible light having a wavelength of 400 to 600 nm is 5% or less.

  In this way, the plate-like body transmits, for example, light rays of red and orange light-emitting elements and hardly transmits other visible rays.

In the above configuration, the colored plate is preferably made of Li ₂ O—Al ₂ O ₃ —SiO ₂ based crystallized glass containing 0.01 to ₂ % by mass of V ₂ O ₅ .

In this way, the colored plate can be efficiently colored with a small amount of V ₂ O ₅ , and the average transmittance of visible light having a wavelength of 600 to 800 nm is 10% or more. The average transmittance of visible light of 400 to 600 nm tends to be 8% or less. When the content of V ₂ O ₅ is less than 0.01 wt%, the average transmittance of visible light is high in the wavelength 400 to 600 nm, it is impossible to conceal the cooker interior. On the other hand, when the content of V ₂ O ₅ is more than 2% by mass, the average transmittance of visible light having a wavelength of 600 to 800 nm is lowered, and the light of the light emitting element (for example, red or orange light) is transmitted. It becomes difficult to do.

Moreover, in the said structure, it is preferable that an average thermal expansion coefficient in 30-500 degreeC is a colored plate-like body is -10- + 50 * 10 < ^-7 > / degreeC.

  In this way, since the thermal expansion characteristics of the top plate are easily matched, when the top plate and the colored plate are bonded with a heat-resistant resin, it is difficult for stress to occur in the bonded portion, and the colored plate. Is difficult to peel.

The colored plate-like body preferably has a thickness of 1 to 5 mm. When the wall thickness is less than 1 mm, it is not easy to break even when a small external force is applied, and a large amount of colorant (for example, V ₂ O ₅ ) must be added for coloring. In addition, when the thickness is thicker than 5 mm, the distance between the light emitting element and the top plate is increased, and in particular, it is difficult to see the light from the light emitting element.

  In the above structure, the light ray of the light-emitting element is preferably orange or red.

  If it does in this way, the light ray of a light emitting element can fully permeate | transmit a colored plate-shaped object.

  In the above configuration, the non-formation part other than the light emitting element display part is preferably one or two or more regions selected from the IH part, the infrared heating part, and the liquid crystal display part.

  In this way, even if the light shielding film is not as strong to the left as possible, for example, by making the infrared heating part (radiant heater part) a non-formation part, deterioration of the light shielding film due to heat or discoloration occurs. It becomes difficult, and it becomes difficult to generate heat. In addition, since the position of each of the above-described parts can be accurately grasped depending on whether or not a light shielding film is formed, there is no placement displacement when the heated body is placed on the infrared heating unit. By making the liquid crystal display part a non-formation part, the information indicated by the liquid crystal display part can be clearly obtained from the surface side of the glass plate without being obstructed by the light shielding film.

  In the above configuration, the light shielding film is preferably formed of a printed film or a vapor deposition film.

  The printed film is made of an inorganic pigment and glass, and is preferably porous in order to prevent cracks due to a difference in expansion from the crystallized glass plate. In order to make the printed film porous, it is preferable to use a forming material in which the ratio of the inorganic pigment powder to the glass powder is in the range of 5: 5 to 9: 1, preferably 5: 5 to 8: 2. . If the ratio of the glass powder is 10% or more, the inorganic pigment powder can be firmly fixed to the crystallized glass plate, and if it is 50% or less, the glass powder does not sinter densely and easily. A porous membrane can be obtained.

Examples of the inorganic pigment _powder, other _{TiO 2, ZrO 2, ZrSiO 4} , Co-Al-Zn -based, Co-Al-Si-based, Co-Al-Ti-based, Co-Al-Cr-based, Co-Ni-Ti -Zn, Ti-Sb-Cr, Ti-Ni, Co-Si, Ti-Fe-Zn, Fe-Zn, Fe-Ni-Cr, Zn-Fe-Cr-Al, Co -Cr-Fe-based, Cu-Cr-based, Cu-Cr-Fe-based, Cu-Cr-Mn-based oxide pigments and the like can be used alone or in combination. Examples of the glass powder include B ₂ O ₃ —SiO ₂ type, Na ₂ O—CaO—SiO ₂ type, Li ₂ O—Al ₂ O ₃ —SiO ₂ type, ZnO—Al ₂ O ₃ —P ₂ O ₅ type, etc. Glass can be used.

  When the light-shielding film is a printed film, the thickness of the light-shielding film is preferably from 0.1 to 50 μm on average, particularly preferably from 0.2 to 40 μm. If the thickness is 0.1 μm or more, it becomes possible to shield visible light to hide the internal structure of the cooking device such as a heating device and wiring, and if it is 50 μm or less, the film is formed by increasing the number of times of printing and increasing the material cost. An increase in cost can be suppressed. Furthermore, although the top plate is remelted and recycled, the inorganic pigment contained in the coating becomes an impurity for the glass and causes the glass to be colored. However, if the film thickness is thin, coloring is difficult to occur.

  In the above configuration, it is preferable that a porous printed film made of an inorganic pigment and glass is formed on the surface of the low expansion transparent crystallized glass plate, and a heat resistant resin layer is formed on at least the electromagnetic heating portion of the printed film. .

  The printed film formed on the top plate has a low packing density, a large number of minute gaps, and no gloss. For this reason, the adhesive used for adhesion of the temperature sensor flows into the gaps of the printed film and solidifies. As a result, only that portion is glossy and looks different from the surroundings.

  Therefore, in the present invention, the heat-resistant resin layer is formed on the printing film in advance to prevent the temperature sensor adhesive from flowing into the gaps in the printing film.

In addition, when used in a cooker equipped with not only an electromagnetic heating device but also an infrared heating device, the printing density of the printed film in the infrared heating portion is lower than that of the electromagnetic heating portion, or the printing film film is lower than the electromagnetic heating portion. It is desirable to reduce the thickness. A raster film (metallic gloss film) may be formed in place of the printed film made of an inorganic pigment and glass. In other words, since the light-shielding film made of a printing film is difficult to transmit infrared rays, it is necessary for infrared heating by reducing the printing density of the printing film in the infrared heating portion, reducing the film thickness, or using a raster film. This is because an amount of infrared rays can be transmitted. The “print density” means a film formation (printing) area per unit area. For example, when the total area of the film forming portions per 1 cm ² of a certain area of the top plate is 0.5 cm ² , the printing density is 50%. The “printing density of the infrared heating portion” is the average printing density of the entire region corresponding to the infrared heating device of the cooker, and the “printing density of the electromagnetic heating portion” is the entire region corresponding to the electromagnetic heating device. Means average print density.

When the printing density is lowered, 30 to 80% of the printing density of the electromagnetic heating portion, especially 40
It is preferable to be set to ˜80%. If the printing density of the infrared heating part is 30% or more of the electromagnetic heating part, it is possible to shield visible light to completely hide the heating device, and if the printing density is 80% or less, the infrared transmission amount is sufficient. High cooking performance can be obtained.

As a method for reducing the printing density of the printed film and ensuring a sufficient amount of infrared transmission, for example, there is a method of providing a large number of apertures. When forming the apertures, it is desirable to uniformly distribute the entire infrared heating portion. The size of each opening is preferably about 0.05 to 5 mm in diameter, particularly about 0.1 to 3 mm. Further, it is preferable to form about 5 to 500 holes, especially about 10 to 500 holes per 1 cm ² .

  When reducing the thickness of the printed film, it is preferable to set the thickness to about 10 to 50%, particularly about 10 to 40% of the light-shielding film of the electromagnetic heating portion. If it is 10% or more, the contrast with the surroundings does not increase, and it becomes difficult to stand out. Moreover, if it is 50% or less, infrared rays will increase, and sufficient cooking performance will be obtained.

  In the case of a raster film, those containing metal elements such as Au, Pt, Pd, Rh, Ru, Bi, Sn, Ni, Fe, Cr, Ti, Ca, Si, Mg, and composites thereof can be used. is there. In particular, those containing Au, Pd, Bi, Sn, Fe, Ti, etc. can be suitably used. The average thickness of the raster film is preferably 0.1 to 10 μm, particularly preferably 0.1 to 5 μm.

  The heat resistant resin layer is required to have a heat resistance of about 200 ° C. or higher. As the resin having heat resistance, a polyimide resin, an (aromatic) polyamide resin, a fluorine resin, a silicon resin, or a composite thereof can be used as a main component. The heat resistant resin layer may be colorless or colored.

  The film thickness of the heat resistant resin layer is suitably from 0.01 to 50 μm. If it is 0.01 μm or more, it is possible to prevent the penetration of the adhesive. Moreover, if it is 50 micrometers or less, the problem of a raise of cost and the problem that a reduction | restoration occurs in the case of remelting of a glass are hard to arise.

  Further, this layer may contain a heat-resistant organic pigment or an inorganic pigment in order to adjust the appearance of the light-shielding film.

  The heat-resistant resin layer may be applied only to the electromagnetic heating portion, but may be applied to other portions. For example, when an adhesive is used to attach the top plate to the cooker body, adhesion marks may appear as in the case of the electromagnetic heating part. Appearance can be obtained. In order to make the color tone of the entire printing film uniform, it is desirable to apply the heat resistant resin layer to the entire surface of the printing film excluding the infrared heating portion. When the heat resistant resin has high heat resistance and can withstand the high temperature during infrared heating, a better appearance can be obtained by providing a heat resistant resin layer on the infrared heated portion.

  The top plate for a cooking device of the present invention is used by being attached to the cooking device such that the light shielding film and / or the heat-resistant resin layer faces the cooking device main body side, that is, the electromagnetic heating device (and the infrared heating device). The attachment to a cooking appliance is performed by adhere | attaching and fixing to a top plate support frame provided in the cooking appliance main body using silicon resin etc.

  In addition, a decorative coating can be printed and formed on the upper surface of the cooker as necessary for improving the design and displaying the heater position. The decorative coating can also be formed using a material composed of an inorganic pigment powder and a glass powder, but it is necessary to form a strong and smooth film so that it does not peel off even when rubbed and it is difficult for dirt to adhere. Therefore, it is important to select a decorative coating material having a higher glass content than the light-shielding coating material. Specifically, the glass content in the decorative coating material is preferably 50% or more on a mass basis. Moreover, the same material as what is used for a printing film can be used for glass powder and inorganic pigment powder.

  Moreover, you may give antifouling processes, such as a fluorine coat, to the surface used as the upper surface of a cooking device.

  In addition, when the light-shielding film is formed of a vapor deposition film (for example, a sputtered film), the vapor deposition film not only has a smooth and dense structure, but also strongly adheres to the back and / or front surface of the glass. Since it is formed, the basic characteristic is that the light-shielding film is hardly peeled off.

  In this case, the deposited film is a kind of metal selected from the group consisting of Si, Ti, Al, Nb, W, Mo, Sn, Cr, Pt and Au, or from the group consisting of stainless steel, Hastelloy, Inconel and Nichrome. One kind of alloy selected, nitride of one kind alloy selected from the group consisting of stainless steel, Hastelloy, Inconel and Nichrome, or one or two kinds selected from the group consisting of Ti, Nb, W and Mo When the above metal nitride is included, coloring is performed and an excellent light-shielding ability is obtained, so that the internal structure of the cooking device such as a heating device and wiring can be appropriately concealed. Moreover, since such a deposited film has a high regular reflectance and has a metallic luster, it can enjoy the advantage of being well matched with a metal kitchen table or wall such as stainless steel existing around the cooking device. .

  Further, the light shielding film is composed of a vapor deposition film (colored film) and an antioxidant film, and the antioxidant film is formed on the vapor deposition film or between the surface of the glass plate made of low expansion glass and the vapor deposition film. If it forms, it will become difficult to oxidize a vapor deposition film, and the deterioration of the vapor deposition film by a heat | fever can be suppressed. That is, when the antioxidant film is formed on the vapor deposition film in contact with air, oxidation of the vapor deposition film by oxygen in the air is prevented, while the antioxidant film is a glass made of low expansion glass. This is because when formed between the plate and the vapor deposition film, the oxidation of the vapor deposition film by oxygen in the low expansion glass is prevented by the characteristics of the antioxidant film. In particular, when an anti-oxidation film is formed on the back surface (non-use surface) of the top plate and a vapor deposition film is formed on the anti-oxidation film, various materials utilizing light interference can be obtained by adjusting the film material and film thickness. Can be obtained.

  In this case, the antioxidant film is an oxide of one or more metals selected from the group consisting of Si, Ti, Al, Nb, W, Mo, Ta, and Sn, or an oxide of Si, Al, or Ti If it contains, since the antioxidant capability of a vapor deposition film is high, it is preferable.

  Further, when the vapor deposition film or the antioxidant film is made of a component contained in the crystallized glass, specifically, a metal of Ti, Si or Al, or a nitride or oxide thereof, glass is used. When the material is remelted as a raw material, it is preferable because the glass is not colored or glass defects such as blisters are not generated.

  As a specific first example of the film configuration of the vapor deposition film on the top plate, a geometry of 10 to 1000 nm, preferably 15 to 700 nm, in order from one side (back side) of a glass plate made of low expansion glass (colorless and transparent). Forming a first layer made of a vapor-deposited film (colored film) having a desired thickness and a second layer made of an antioxidant film having a geometric thickness of 10 to 1000 nm, preferably 15 to 700 nm. It is done.

  Further, as a second example, a first anti-oxidation film having a geometric thickness of 10 to 1000 nm, preferably 20 to 700 nm, in order from one surface (back surface) of a glass plate made of low expansion glass (colorless and transparent). A second layer composed of a deposited film (colored film) having a geometric thickness of 10 to 1000 nm, preferably 15 to 700 nm, and a geometric thickness of 10 to 1000 nm, preferably 20 to 700 nm. Forming a third layer made of an antioxidant film.

In the first and second examples, it is particularly preferable that the vapor deposition film (colored film) contains TiN, Si, Ti, AlTiN, W, or WN from the viewpoint of having excellent heat resistance. In addition, it is preferable that the antioxidant film contains SiN, AlN, SiO ₂ , Al ₂ O ₃ , or TiO ₂ from the viewpoint that the deposited film has an excellent antioxidant effect.

As the transparent glass plate, a material having a high thermal shock resistance capable of withstanding rapid cooling from 600 ° C. can be used. Specifically, the thermal expansion coefficient is 50 × 10 ⁻⁷ / ° C. or less. It is preferable to use a low-expansion crystallized glass whose main crystal is a low-expansion borosilicate glass, quartz glass, or β-quartz solid solution. In particular, a glass having an average thermal expansion coefficient at 30 to 500 ° C. of −10 to + 30 × 10 ⁻⁷ / ° C., more preferably −10 to + 20 × 10 ⁻⁷ / ° C. has a higher thermal shock resistance, and thus has a high thermal shock resistance. Even if the temperature distribution is increased in a glass plate made of low expansion glass, it is preferable from the viewpoint that stress is hardly generated and cracking is difficult.

  According to the top plate for a cooker according to the present invention, the colored plate-like body that transmits the light beam of the light emitting element, from the non-light-shielding film formation region corresponding to the arrangement of the indicator (light emitting element) made of LED, The inside of the cooking device such as wiring is not visible, and the number displayed by the LED is not mistaken.

  Hereinafter, a top plate for a cooking device (hereinafter also simply referred to as a top plate) according to an embodiment of the present invention will be described with reference to the drawings. 1A is a top view of the top plate according to the embodiment of the present invention as viewed from the front surface side, FIG. 1B is a bottom view of the top plate as viewed from the back surface side, and FIG. 2 is FIG. FIG. 3 (a) is a top view of the LED device, and FIG. 3 (b) is a partially enlarged view of the light-emitting element display unit of FIG. 1 (a). .

As shown in FIG. 1 (a), the top plate 1 according to this embodiment has a transparent crystallized glass (N-0 manufactured by Nippon Electric Glass Co., Ltd., an average linear thermal expansion coefficient at 30 to 500 ° C. is −5 × 10 ^-7 / ° C) of a 4 mm thick glass plate 2 as a substrate, a single radiant heater portion A as an infrared heating portion, a pair of IH portions B and B, and a light emitting element display portion C is arranged in a plane. Further, a decorative film 3 is formed on the radiant heater part A and the IH part B.

As shown in FIG. 1B, a printing film 3 serving as a light-shielding film is formed on the back surface, which is a non-use surface of the glass plate 2, in a region excluding the light emitting element display portion C. Further, a heat resistant resin layer 4 having a thickness of about 5 μm is formed in an area excluding the radiant heater portion A and the light emitting element display portion B in the upper layer of the printed film 3. Incidentally, the printing film 3 in the radiant heater portion A has a large number of circular non-formed portions so that heat rays from the radiant heater can easily pass therethrough. Further, the printing layer 3 is composed of 70 wt% of a commercially available Cu-Cr-Mn type black inorganic pigment powder and 30 wt% of B ₂ O ₃ -SiO ₂ glass (Nippon Electric Glass Co., Ltd. BHW). The thickness of the printed film 3 was 5 μm as measured with a film thickness meter.

As shown in FIG. 2, a colored plate-like body 5 having a thickness of 2.3 mm that is several mm larger than the light-emitting element display portion C is fixed to the glass plate 2 using a silicone resin adhesive 6. It is. This colored plate-like body 5 is a colored crystallized glass containing 0.1% by mass of V ₂ O ₅ (GC-190 manufactured by Nippon Electric Glass Co., Ltd., and an average linear thermal expansion coefficient at 30 to 500 ° C. is 1 × 10 ^{− 7} / ° C.) consists, average transmission at 400~600nm is 2.3%, the average transmittance of at 600~800nm was 29.9%. The visible light transmittance was measured with a spectrophotometer (manufactured by Shimadzu Corporation, UV-3100).

  Under the colored plate-like body 5, three LED devices 7 fixed on the substrate 8 are arranged. In addition to the LED device 7, wiring (not shown) of the LED device 7 and the like are attached on the substrate 8.

  As shown in FIG. 3 (a), the LED device 7 is a device for displaying numbers. In each LED device 7, seven LEDs 7a that emit red light have seven corresponding LEDs. An upper plate 7b in which holes are formed is installed. When the LED device 7 is viewed from above, when the LED 7a emits light, red light can be seen from the corresponding hole, but when the LED 7a does not emit light, the corresponding hole appears white.

  Therefore, unless the colored plate-like body 5 is installed on the upper portion of the LED device 7, as shown in FIG. 3A, in addition to the light emitted from the LED 7a, the hole corresponding to the LED 7a that does not emit light. Because it looks white, it is easy to misunderstand the numbers depending on the viewing angle. Further, the substrate 8 and the wiring (not shown) on the substrate 8 can be seen from between the three LED devices 7.

  However, as shown in FIG. 3B, in the embodiment of the present invention, since the colored plate-like body 5 is installed on the upper part of the LED device 7, only the light emitted from the LED 7a can be seen and emitted. The hole corresponding to the LED 7a that does not appear does not appear white, and the wiring (not shown) on the substrate 8 and the substrate 8 do not appear between the three LED devices 7.

FIG. 1A is a top view of a top plate according to an embodiment of the present invention as viewed from the front surface side, and FIG. 1B is a bottom view of the top plate as viewed from the back surface side. FIG. 2 is a partially enlarged cross-sectional view taken along line aa in FIG. 3 (a) is a top view of the LED device, and FIG. 3 (b) is a partially enlarged view of the light-emitting element display unit of FIG. 1 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate for cookers 2 Glass plate 3 Decoration film 4 Heat-resistant resin layer 5 Colored plate-like body 6 Silicone resin adhesive 7 LED device
7a LED
7b Upper board 8 Board

Claims (6)

A top plate for a cooker having a light-shielding film forming portion and a non-forming portion on the back surface of the transparent glass plate, and a light emitting element disposed below the non-forming portion,
A top plate for a cooking device, wherein a colored plate-like body that transmits light rays of a light emitting element is attached to the back surface of a transparent glass plate. 2. The colored plate-like body has an average transmittance of visible light having a wavelength of 600 to 800 nm of 10% or more and an average transmittance of visible light having a wavelength of 400 to 600 nm of 8% or less. The top plate for a cooker as described in 1. The colored plate-shaped body, according to claim 1 or 2, characterized in that the V ₂ O ₅ from the _{Li 2 O-Al 2 O 3} -SiO 2 based crystallized glass containing 0.01 to 2 wt% Top plate for cooking utensils. The top plate for a cooking device according to any one of claims 1 to 3, wherein the colored plate-like body has an average coefficient of thermal expansion at -30 to 500 ° C of -10 to +50 x 10 ^-7 / ° C. The top plate for a cooking device according to claim 1 or 2, wherein the light beam of the light emitting element is orange or red. The non-formation part other than the light emitting element display part is one or two or more regions selected from the IH part, the infrared heating part, and the liquid crystal display part. The top plate for a cooker as described.