JP2003151741A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance user-friendliness by coping with difficulty in visual grasp due to the fact that alternating magnetic flux output from an induction heating cooker cannot be seen by eyesight. SOLUTION: This induction heating cooker comprises a translucent top board 203 on which a container 202 to be heated and cooked is placed, a heating coil 204, a light emission means 206 for emitting rays, and a translucent light guide means 207 for transmitting the rays of the emission means 206. A curved surface recessed for the emission means 206 is formed at a boundary section of the light guide means 207 into which the rays of the emission means 206 are injected and thereby an angle of refraction can be larger and the induction heating cooker with a large light intensity capable of uniformly displaying a large area is provided even if an emission means with a small directing angle is used.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker used in ordinary households. [0002] In recent years, induction heating cookers have attracted attention as safe heating cookers. 2. Description of the Related Art Conventionally, as a method of displaying the heating state of this type of induction heating cooker, a configuration in which a display unit that is turned on using a light bulb or a semiconductor element or the like is generally provided around an output setting unit is generally used. In addition, some of the built-in induction heating cookers and the like are provided with a similar display section in front of the cooking section because the output setting section and the cooking section are visually separated. Hereinafter, the configuration will be described with reference to FIG. [0003] As shown in the figure, a case 1 constituting a main body is shown.
And a top plate 3 on which the container 2 to be heated is placed, a heating coil 4 located below the top plate 3, a temperature sensor 5 for detecting the temperature of the container 2 to be heated, and an output of the heating coil 4. Output control unit 6 for controlling, and blower 7 for cooling output control unit 6
A power switch 8 for turning on / off the power, a power display unit 9 for displaying on / off of the power switch 8, an output setting unit 10 for setting output, and an output display unit for displaying output setting 11, a second output display section 12 located in front of the top 3, and a heating state display section 13 for displaying heating. In the above configuration, when the power switch 8 is operated, the power display section 9 is turned on to display power on / off. Further, when the container 2 to be heated containing the food is placed on the top plate 3 and the output setting section 10 is operated, the output display section 11 is displayed.
Lights up to indicate the output setting and heating is started. At the same time, the second output display section 12 is turned on to display the output setting. Further, the heating state display section 13 is turned on in accordance with the temperature state detected by the temperature sensor 5 to display the heating state. [0005] In such a conventional method of displaying the heating state of an induction heating cooker, cooking is actually performed. The part and the part to be displayed are visually separated, making it difficult to grasp visually. In particular, compared to a gas cooker in which a flame is visible, an alternating magnetic flux output from an induction heating cooker is invisible.
There was a problem that it was difficult to grasp visually and the usability was poor. [0008] It is an object of the present invention to provide a more convenient induction heating cooker by displaying the heating state of a highly safe induction heating cooker as if it were a gas cooker. [0009] In order to solve the above problems, the present invention provides a translucent top plate on which a container to be heated is mounted, a heating coil for heating the container to be heated, It has a light emitting means for emitting light, and a light transmitting means for transmitting light of the light emitting means, and is configured to emit light at an outer peripheral portion of the light guiding means. By emitting light at the outer peripheral portion of the light guide means as in the present invention, the emitted light can pass through the translucent top plate, and the heating state can be displayed on the upper surface side of the top plate. Therefore, the display of the heating state, which has been visually separated, can be expressed in the vicinity of the cooking unit, and can be used as if it were a gas cooker. [0010] In order to solve the above problems, the present invention provides a transparent top plate on which a container to be heated is mounted, a heating coil for heating the container to be heated, and a light beam. A light-emitting means for emitting light, and a light-transmitting light-guiding means for transmitting light rays of the light-emitting means. Is provided. As described above, a curved surface having a concave shape (having a property of collecting light rays in the case of a convex shape and spreading light rays in the case of a concave shape) with respect to the light emitting means is provided at the boundary portion of the light guide means. This can increase the angle of refraction,
Even when using light emitting means with a small directivity angle, high luminous intensity,
A uniform display with a wide range can be obtained. (Embodiment 1) An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram of an induction heating cooker according to an embodiment of the present invention. The case 101 forms a main body, and a top plate 103 made of a light-transmitting heat-resistant glass or the like on which a cooking container 102 is placed. , Top plate 10
3, a heating coil 104 for heating the cooking vessel 102 to be heated, an output control means 105 for controlling the output to the heating coil 104, and a light bulb for emitting light, A light emitting means 106 made of a semiconductor element or the like, and a light guiding means 107 made of a translucent glass or resin which is located below the heating coil 104 and propagates the light of the light emitting means 106 are provided. An induction heating cooker provided inside the outer peripheral end of the light means 107 to propagate light rays in a substantially horizontal outer peripheral direction of the light guide means 107 and emit light at the outer peripheral part of the light guide means 107, The heating coil 104 and the light emitting means 106 are connected to the output control means 105 by a lead wire or the like. The operation of the induction cooking device configured as described above will be described. When the heating container 102 is placed on the top plate 103 and heating is started, the heating coil 10
At the same time, a signal is output from the output control means 105 so that the light emitting means 106 emits light. The emitted light propagates through the light guiding means 107 and emits light at the outer peripheral portion. The emitted light passes through a top plate 103 made of a light-transmitting heat-resistant glass or the like, and displays a heated state on the upper surface side of the top plate 103, as shown in FIGS. It is. As described above, according to the embodiment of the present invention, the heating state can be displayed on the upper surface side of the top plate 103 by emitting light at the outer peripheral end of the light guiding means 107. Therefore, the display of the heating state, which has been visually separated, can be expressed in the vicinity of the cooking unit, and can be used as if it were a gas cooker. Further, the light guiding means 107 and the light emitting means 106
Is provided below the heating coil 104, it is possible to prevent a light beam from leaking directly above the light emitting means 106. When a resin or the like is used for the light guide unit 107,
It is possible to prevent discoloration, deformation, and the like due to thermal effects due to radiation, conduction, and transmission from the heated cooking container 102 and the like. In the light emitting means 106 composed of a light bulb or a semiconductor light emitting element, it is possible to prevent a malfunction due to the influence of a strong magnetic field or a decrease in reliability due to self-heating. Note that it is possible to prevent a decrease in luminous intensity due to an increase in the temperature of a semiconductor element or the like used for the light emitting means 106. In this embodiment, the display state of the heating state is annular, semi-annular or dotted, but is not particularly limited as long as it is displayed through the top plate 103. The top plate 103 does not need to be translucent on the entire surface, and the same effect can be obtained even if there is an opaque portion. As another embodiment, as shown in FIG. 3, a light guiding means 107 made of a transparent glass or resin.
Is formed in a disc shape, an opening is provided at the center, the light emitting means 106 is arranged at the opening of the light guiding means 107, and the light beam is propagated toward the outer periphery of the light guiding means. The operation of the induction cooking device configured as described above will be described. Most point light sources, such as light bulbs and semiconductor elements, used for the light emitting means 106 generally spread at a certain directional angle.
The light intensity of the light beam projected in a parallel plate shape with respect to 06 becomes non-uniform. This is because each light beam has a different linear distance from the parallel plate. However, according to the embodiment of the present invention,
The linear distance from the light emitting means 106 to the outer peripheral end of the light guiding means 107 is constant with the same radius, and a display with uniform luminous intensity can be obtained. The same effect can be obtained by applying a diffusing material to the outer peripheral end of the light guiding means 107 or treating it so that the surface is irregularly reflected, or by integrating or fixing a separate light receiving material. . The number of light emitting means 106 can be arbitrarily set by a designer. Further, as another embodiment, as shown in FIG. 4, a light guiding means 107 made of a transparent glass or resin.
The light guide means 107 is provided with a reflecting means 108 made of opaque resin, sheet metal, or a mirror body on the upper surface, lower surface, or both surfaces of the light guiding means 107. It is. The operation of the induction cooking device configured as described above will be described. As described in the above embodiment, most of the point light sources such as a light bulb or a semiconductor element used for the light emitting means 106 generally spread at a certain directional angle. Therefore, the incident surface of the light guiding means 107 needs to have a thickness corresponding to the directivity angle of the light emitting means 106. When the thickness of the incident surface of the light guide is thinner than the directivity angle of the light emitting means 106, all light rays out of the thickness will be lost. However, when the directional angle of the light emitting means 106 is wide, it is not rational to make the thickness of the light guiding means 107 uniform all the way, and the thickness becomes thinner toward the outer circumference where light rays propagate. It is conceivable to configure as follows. Further, since the light beam has the property of traveling straight, the light beam penetrates an inclined surface provided to reduce the thickness, and the light beam is lost. However, as in the embodiment of the present invention, the light guide means 107 made of translucent glass or resin is made thicker on the inner circumference and thinner toward the outer circumference, so that the And a rational configuration can be achieved. Light guide means 1
By providing the reflecting means 108 made of opaque resin, sheet metal, mirror body, or the like on the upper surface, lower surface, or both surfaces of 07, it is possible to reduce the loss of light rays during propagation and obtain a display with less loss and high luminous intensity. it can. As another embodiment, as shown in FIG. 5, a light guiding means 107 made of a transparent glass or resin.
A C-cut (45 ° with respect to the direction in which light propagates) is provided as an irradiation surface at the outer peripheral end of the light source, and the transmitted light is totally reflected. The operation of the induction cooking device configured as described above will be described. When the light of the light emitting means 106 made of a light bulb or a semiconductor element is incident from the end of the light guiding means 107 made of translucent glass or resin, the light transmitted through the light guiding means 107 is applied to the opposite end of the light emitting means 106. Light is emitted at the part. A C-cut (45 ° with respect to the direction in which light propagates) is formed as an irradiation surface at this end, and the light can be guided toward the cooking plate 103 as a cooking surface by totally reflecting the propagated light. it can. As described above, according to the embodiment of the present invention, a clearer display can be performed on the top surface of the top plate 103. As another embodiment, as shown in FIG. 6, a light guiding means 107 made of a translucent glass or resin.
A reflecting means 108 made of opaque resin, sheet metal, a mirror body, or the like is arranged in parallel with the C-cut provided at the outer peripheral end of the lens. The operation of the induction heating cooker configured as described above will be described. The light beam that has propagated through the light guide means 107 is totally reflected by a C-cut (45 ° with respect to the light propagation direction) provided at the outer peripheral end of the light guide means 107. However, considering variations in manufacturing, it is conceivable that light rays may be lost from the C-cut. Therefore, the reflecting means 108 made of opaque resin, sheet metal, mirror, or the like is arranged in parallel with the C-cut, and guides the lost light rays toward the top plate 103 serving as the cooking surface. As described above, according to the embodiment of the present invention, even the light beam lost due to the variation in manufacturing can be guided by the reflecting means 108 toward the top plate 103 serving as the cooking surface, so that a clearer display can be achieved. It can be performed. In this embodiment, the reflecting means is arranged. However, irregular reflection may be provided on the C-cut surface with irregularities, or a diffusing material may be applied, or a separate light receiving material may be integrated or fixed. A similar effect can be obtained. As another embodiment, as shown in FIG. 7, a light guiding means 107 made of a transparent glass or resin.
On the upper surface of the C-cut provided at the outer peripheral end of the upper surface, a wall portion 109 rising vertically to the top plate 103 made of a light-transmitting heat-resistant glass or the like is provided, and is transmitted to the upper surface portion of the wall portion 109. A display unit 110 for irregularly reflecting or diffusing a light beam is provided. The operation of the induction cooking device configured as described above will be described. The light beam guided in the direction of the top plate 103 by the total reflection by the C-cut is
Is located below the heating coil 104, the top plate 103
Looks deeper. However, a wall is provided on the upper surface of the light guiding means 107 to guide light rays in the direction of the top plate 103, and
By providing the display means 110 for irregularly reflecting or diffusing light rays on the upper surface of the display 9, display can be performed at a position closer to the top plate 103. The display means 110 diffuses irregularly by forming an uneven surface, or applies a diffusing material,
Alternatively, a separate light receiving material is integrated or fixed. As described above, according to the embodiment of the present invention, the image can be displayed at a position closer to the top plate 103, and the visibility is improved. The same effect can be obtained even when the upper surface of the wall 109 is in close contact with the top plate 103.
In addition, the shape of the upper surface of the wall portion 109 may be inclined,
It can be curved or arbitrarily changed by the designer.
The same effect can be obtained by providing a similar uneven surface or a process of diffusing the upper surface or the lower surface of the top plate 103. (Embodiment 2) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a schematic view of an induction heating cooker according to an embodiment of the present invention, in which a case 201 forming a main body, a top plate 203 made of a light-transmitting heat-resistant glass or the like on which a cooking container 202 to be heated is placed, and A heating coil 204 that is located below the top plate 203 and heats the cooking container 202 to be heated; a light emitting unit 206 that is located below the heating coil 204 and that includes a light bulb or a semiconductor element that emits light rays; 204 below,
The light-emitting means 20 includes light-guiding means 207 made of translucent glass or resin for transmitting the light of the light-emitting means 206.
A concave curved surface is provided at the boundary of the light guide means 207 to which the light rays of No. 6 enter. The operation of the induction cooking device configured as described above will be described. Most of the light emitted by the light emitting means 206 composed of a light bulb or a semiconductor element generally spreads at a certain directional angle, and the range used for display is determined by this directional angle. For example, when the disk-shaped light guide means is configured as in the invention described in the first embodiment, the display range is determined by the full angle (360 °) / directivity angle, but the directional angle rarely exceeds 90 °. Yes, a plurality of light emitting means 206 are required. But,
When the directivity angle is large, light loss at the time of entering the light guide 207 increases. In the case where light is propagated by using the light guiding means 207 instead of using direct light as a display, light is lost in the course of propagation, so that the light emitting means 206 needs a considerable amount of luminous intensity. However, in order to obtain a considerable amount of luminous intensity, the directivity angle necessarily decreases. Further, a normal light ray is refracted at an incident angle of a light ray when passing through a boundary between two media, and exhibits a negative property (refraction angle) with respect to the incident angle (incident angle). The number of light emitting means 206 will increase. As described above, in view of the loss of light rays upon incidence, the loss of light rays during the propagation process, the decrease in luminous intensity for display, the refraction of light rays, etc., it is quite necessary to obtain a wide display with a high luminous intensity range. A number of light emitting means 206 are required. However, at the boundary of the light guiding means 207, there is provided a curved surface which is concave with respect to the light emitting means 206 (light has a property of collecting light if it is convex and spreading light if concave). By increasing the refraction angle with respect to the incident angle, the light emitting means 20 having a small directivity angle
6, a wide display with a high luminous intensity range can be obtained. The radius of the concave curved surface can be arbitrarily set by a designer. FIG. 8 shows that the propagation direction of the light beam is from the inside of the outer peripheral end of the light guide means to the outer peripheral direction.
The light emitting means 206 is provided on the outer circumference of the light guide means 207 as shown in FIG.
As shown in FIG. 9B, the light emitting means 2 is provided below the light guiding means 207.
The same effect can be obtained even if the direction of propagation of the light beam is changed from below to above by providing 06. (Embodiment 3) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 10, 11, and 12. FIG. FIG. 10 is a schematic view of an induction heating cooker according to an embodiment of the present invention. The case 301 comprises a main body and a light-transmitting heat-resistant glass or the like in which a cooking container 302 is placed. A plate 303, a heating coil 304 positioned below the top plate 303 for heating the container 302 to be heated, a coil base 311 made of heat-resistant resin or the like on which the heating coil 304 is placed, and positioned below the heating coil 304. And a light-emitting means 3 comprising a light-emitting bulb or a semiconductor element or the like.
06 and below the heating coil 304,
The light guide means 307 is made of a light-transmitting glass or resin which propagates the light rays of No. 06, and the light guide means 307 is fixed to the coil base 311 with screws and bonded. The operation of the induction heating cooker configured as described above will be described. The heating state of the induction heating cooker is displayed on the upper surface side of the top plate 303 by the light guide means 307, and the positional relationship between the heating area and the display by the light guide means 307 becomes important. If the display relationship is displaced, it is predicted that the position where the heated cooking container 302 is placed with respect to the heating region is displaced, and that the heating efficiency is lowered and the heating distribution is uneven. However, by fixing the light guiding means 307 to the coil base 309 with screws and fixing them with adhesive or the like, the position of the heating area and the display by the light guiding means 307 can be regulated. As another embodiment, as shown in FIG. 11, it is conceivable that the coil base on which the heating coil 304 is mounted is also used as the light guiding means 307. As shown in FIG.
The heating coil 304 for performing the heating of the light guide means 30
7, the heating area and the light guide means 307
And can regulate the position with the display by
The configuration can be simplified. When a resin or the like is used for the light guide means 307, problems such as discoloration and deformation due to heat generated by the heating coil 304 or radiation, conduction, or transmission from the heated cooking container 302 or the like are predicted. Therefore, as shown in FIG. 12, it is conceivable to adopt a configuration in which a rib is provided on the contact surface with the heating coil 304 to reduce the contact area and reduce the influence of heat. Note that the same effect can be obtained even if the rib is formed of another member such as a heat-resistant insulating material. Embodiment 4 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG.
Is a schematic diagram of an induction heating cooker showing an embodiment of the present invention,
A case 401 constituting a main body and a heated cooking container 402
403 made of translucent heat-resistant glass or the like
And the heated cooking container 402 located below the top plate 403.
A heating coil 404, a coil base 411 on which the heating coil 404 is mounted, a light emitting unit 406 that is located below the heating coil 404 and includes a light bulb or a semiconductor element that emits light, and a light emitting unit 406 below the heating coil 404. And a light guide 407 made of a translucent glass or resin or the like that transmits the light of the light emitting means 406, and the light emitting means 406 is screwed to the light guiding means 407 and fixed by adhesion or the like. It is a cooker. The operation of the induction cooking device configured as described above will be described. As described in the first embodiment, most of the light beams emitted by the light emitting means 406 formed of a light bulb or a semiconductor element or the like generally spread at a certain directional angle. When the display is performed via the top plate 403, problems such as a small amount of light, making the display difficult to see, and unevenness due to uneven luminous intensity are expected. However, by fixing the light-emitting means 406 to the light-guiding means 407 with screws and fixing them by bonding or the like,
The position of incidence on the light guide 407 can be regulated, and light loss at the time of incidence can be minimized. As for the mounting direction of the light emitting means 406, as shown in FIG. 13, a structure in which the substrate of the light emitting means 406 is screwed or fitted in parallel with the light guide means 407 is simple in terms of manufacturing. However, FIG.
As shown in the figure, the substrate of the light emitting means 406 is parallel to the light guiding means 407 and only the light bulb or the semiconductor element is configured in the same direction as the direction in which the light rays of the light guiding means 407 propagate.
Alternatively, as shown in FIG. 14 (b), the substrate of the light emitting means 406 is perpendicular to the light guiding means 407, and the light bulb or the semiconductor element is formed in the same direction as the direction in which the light rays of the light guiding means 407 propagate. In addition, the loss of light rays upon incidence can be reduced. Embodiment 5 Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 15 is a schematic view of an induction heating cooker according to an embodiment of the present invention. The induction heating cooker includes a case 501 constituting a main body, a top plate 503 made of a light-transmitting heat-resistant glass and the like on which a heating target container 502 is placed. , Top plate 50
3, a heating coil 504 for heating the cooking container 502 to be heated, an output control means 505 for controlling the output of the heating coil 504, and a blowing means 512 including a fan for cooling the output control means 505, Output control means 50
5, a light emitting means 506 made of a light bulb or a semiconductor element which emits light rays, and a duct 513 forming a path for blowing air to the heating coil 5;
04, and a light guiding means 507 made of translucent glass or resin or the like for transmitting the light of the light emitting means 506.
After the output control means 505 is cooled, the light emitting means 506 and the light guide means 507 are cooled. The operation of the induction cooking device configured as described above will be described. The cooling air generated by the blower 512 cools the output controller 505 via the duct 513. By directing the outlet shape of the duct toward the light emitting means 506 and the light guiding means 507 as shown in FIG. 15, the output control means 505 is cooled as shown by the arrow indicating the flow of the cooling air, and then the light emitting means 506 is cooled. And
The top plate 5 passes between the light guiding means 507 and the heating coil 504.
It flows in the direction of 03. Therefore, the heated cooking container 50
The luminous intensity of the semiconductor light emitting element used for the light emitting means 506 is reduced, and the resin used for the light guiding means 507 is discolored or deformed due to thermal effects transmitted by radiation, conduction, or transmission from the second or the like, or thermal effects due to self-heating of the heating coil 504. Etc. can be prevented. Embodiment 6 Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 16 shows a light-emitting means 6 composed of a light-emitting bulb or a semiconductor element.
06 and a light guide 607 made of a translucent glass or resin or the like for transmitting the light of the light emitting means 606, and the light guide 607 is made into a block. The operation of the induction heating cooker configured as described above will be described. The light guiding means 607 is formed into a block according to the directional angle of the light emitting means 606. When a plurality of blocks are combined, a space can be secured as shown in the figure. As described in the fifth embodiment, this space is very advantageous for cooling and can improve the cooling performance. In addition, by forming a block, even if a part of the block breaks down, repair can be performed quickly and easily by replacing only the block. According to the present invention, by providing a concave curved surface with respect to the light-emitting means at the boundary of the light-guiding means into which the light of the light-emitting means is incident, the angle of refraction can be made smaller than the angle of incidence. Even if a light emitting means having a small directional angle can be used, a wide display with a high luminous intensity range can be obtained. Further, the number of light emitting means can be reduced, and an inexpensive device can be provided. In addition, a light beam emitted by the light emitting means is propagated from the inside to the outside from the outer peripheral end of the light guiding means, so that a display with uniform luminous intensity can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an induction heating cooker showing a first embodiment of the present invention. FIG. 2 (a) is a top plate of an induction heating cooker showing a first embodiment of the present invention. FIG. 3B shows another state of the top plate of the induction heating cooker. FIG. 3C shows another state of the top plate of the induction heating cooker. FIG. 4 is a perspective view of a light guiding means of the induction heating cooker showing the first embodiment of the present invention. FIG. 4 is a cross-sectional view of the induction heating cooker showing the first embodiment of the present invention. FIG. 5 is an induction heating showing the first embodiment of the present invention. FIG. 6 is a cross-sectional view of an induction heating cooker according to a first embodiment of the present invention. FIG. 7 is a cross-sectional view of an induction heating cooker according to a first embodiment of the present invention. FIG. 9 (b) is an exploded perspective view of an induction heating cooker showing a second embodiment of the present invention. FIG. 9 (a) is an enlarged view of a light guide means of the induction heating cooker. FIG. 10 (b) is a partially enlarged view showing a light guide means of the induction heating cooker. FIG. 10 is a partially enlarged view showing another embodiment of the light guide means of the induction heating cooker. FIG. 10 is an induction heating cooking showing a third embodiment of the present invention. FIG. 11 is a cross-sectional view of an induction heating cooker showing a third embodiment of the present invention. FIG. 12 is a partially enlarged view showing light guide means of the induction heating cooker showing a third embodiment of the present invention. 13 is a sectional view of an induction heating cooker showing a fourth embodiment of the present invention. FIG. 14 (a) is a partially enlarged view showing the vicinity of a light guide means of an induction heating cooker showing a fourth embodiment of the present invention. FIG. 15 is a partially enlarged view showing another embodiment near the light guide means of the induction heating cooker. FIG. 15 is a cross-sectional view of the induction heating cooker showing a fifth embodiment of the present invention. FIG. 16 shows a fifth embodiment of the present invention. FIG. 17 is an enlarged view of a main part of an induction heating cooker. FIG. 17 is a perspective view of an induction heating cooker showing a conventional example. 02, 402, 502, 602
Cooking devices 103, 203, 303, 403, 503, 603
Top plate 104, 204, 304, 404, 504, 604
Heating coils 106, 206, 306, 406, 506, 606
Light emitting means 107, 207, 307, 407, 507, 607
Light guide means 108 Reflection means 109 Wall section 110 Display means 311, 411 Coil base 505 Output control means 512 Blowing means

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Kazuichi Okada             Matsushita Electric, 1006 Kadoma, Kazuma, Osaka             Sangyo Co., Ltd. (72) Inventor Koichi Hosoi             Matsushita Electric, 1006 Kadoma, Kazuma, Osaka             Sangyo Co., Ltd. F term (reference) 3K051 AB02 AB14 AD35 CD43

Claims (1)

1. A translucent top plate on which a container to be heated is placed, a heating coil for heating the container to be heated, light emitting means for emitting light, and light emitting means. A light-transmitting light-guiding means for propagating the light rays, and a concave surface with respect to the light-emitting means is provided at a boundary portion of the light-guiding means to which the light rays of the light-emitting means are incident. Induction heating cooker.