JP4300964B2 - Induction heating cooker - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an induction heating cooker that displays heating on a top plate and light and a placement position of a cooking utensil to be heated.

  In general, this type of induction heating cooker is safe without flames, etc., while the cooking utensil is being heated, the top plate on which it is placed is visually unchanged from the unheated state, There is a user's voice that it is difficult to distinguish whether it is heating or not at a glance, and therefore, in order to make it easy to understand that some products are heating, a ring shape that imagines a flame from the top plate And the like (see Patent Document 1).

FIG. 4 shows a conventional induction heating cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 4, the induction heating cooker is positioned below the top plate 103, a main body 101 that constitutes the outer shell, a top plate 103 made of translucent heat-resistant glass on which the cooking utensil 102 is placed, and the like. An induction heating coil 104 that heats the cooking utensil 102 to be heated, an output control means 105 that controls the output of the induction heating coil 104, and a light-transmissive glass or resin provided below the induction heating coil 104. The light plate 106 and the light source 107 attached to a dedicated substrate for irradiating the light guide plate 106 with light are configured. Then, the light source 107 is provided inside the outer peripheral end of the light guide plate 106, the light emitted from the light source 107 enters and guides the light in the light guide plate 106, and the light is directed toward the top plate 103 at the outer peripheral portion of the light guide plate 106. It is configured to radiate. With this configuration, it is indicated that the apparatus is being heated by light, and at the same time, it serves as a guide for the position where the cooking utensil is to be placed.
JP 2001-160483 A

  However, in the conventional induction heating cooker, the light source of the light guide plate used for irradiating the top plate is provided on a substrate different from the control circuit of the device. That is, since the light source is required to have a long life, the light source is generally mounted on a printed wiring board using a light emitting diode or the like. For this reason, the number of circuit components is increased, and lead wires for electrical connection are required, resulting in complicated equipment, increased costs, and complicated wiring.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an induction heating cooker that simplifies the mounting structure of a light source for irradiating light to a light guide plate and reduces costs.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a main body constituting an outer shell, and a cooked utensil disposed on a top surface of the main body and made of a translucent material. A top plate, an induction heating coil provided below the top plate, a power supply circuit for supplying high-frequency power to the induction heating coil, an operation unit unit in which an operation unit is disposed on the top surface of the main body, Light from the light source disposed below the top plate is received and guided by the light receiving surface, and a substantially annular light is emitted from the light emitting surface in the direction of the top plate to display the position where the cooked food is placed. The operation unit is configured to house a control circuit board provided with a circuit for controlling a device by a signal from the operation part, and to provide the light source on the control circuit board.

  With this configuration, the light source mounting structure is simplified, it is not necessary to newly provide a printed wiring board dedicated to the light source, and lead wires for connecting to the substrate are also unnecessary.

  The induction heating cooker of the present invention can simplify the mounting structure of the light source that irradiates light to the light guide plate, and can reduce the cost.

1st invention is provided in the downward direction of the top plate which mounts the main body which comprises an outer shell, the to-be-heated cooking appliances which were distribute | arranged to the top | upper surface of the said main body, and were comprised with the translucent material. An induction heating coil, a power supply circuit for supplying high-frequency power to the induction heating coil, an operation unit having an operation unit disposed on the top surface of the main body, and light from a light source disposed below the top plate. A light guide plate that receives and guides light at the light receiving surface, emits substantially annular light in the direction of the top plate from the light emitting surface, and displays a position where the cooked utensil is placed ; While storing the control circuit board provided with a circuit for controlling the device by a signal from the operation unit, and having the configuration in which the light source is provided in the control circuit board, there is no need to newly provide a board dedicated to the light source, Since no lead wires are required to connect to the board. Structure can be simplified, costs can also be minimized, comprising a light source provided in the control circuit board can be easily disposed at a position closer to the top plate.

In a second aspect of the present invention, particularly in the first configuration , the operation unit is provided with a cover to which the control circuit board is attached and covers the control circuit board from above, and covers the light source and the light receiving surface from the top. by the irradiation of light from the light plate to the top plate partially blocked to form a trimmed that wall irradiation shape of the light to the top plate, carried out without the shielding an unnecessary portion of the illumination light, additional components be able to.

According to a third aspect of the present invention, in the configuration of the first aspect of the invention, in the light guide plate or the case for housing the light guide plate, at least one of the convex portion or the concave portion is formed and the cover for housing the control circuit board is formed. By forming the positioning portion that fits into the convex portion or the concave portion, the light from the light source can be accurately irradiated to a predetermined position of the light guide plate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment)
FIG. 1 is an external view of an induction heating cooker according to an embodiment of the present invention.

  A top plate 2 on which the cooking utensils to be heated are placed is arranged on the top surface of the main body 1 forming the outer shell. The top plate 2 is made of a translucent material that is not heated by electromagnetic induction, such as highly heat-resistant glass. The top frame 3 surrounds and supports the outer periphery of the top plate 2 and constitutes a part of the top surface of the main body 1.

  The operation unit 4 is disposed on the top surface of the main body 1 and includes a signal input unit for controlling operation of the device by operation, a display unit for displaying the operation state of the device, and the like.

  FIG. 2 is an exploded perspective view of the induction heating cooker according to the embodiment of the present invention. In the figure, an induction heating coil 5 is provided close to the bottom of the top plate 2. The case 6 houses an induction heating coil 5 and a light guide plate 7 described later, and is held at a predetermined position in the main body 1. The power supply circuit 8 supplies high frequency power to the induction heating coil 5, and the cooling fan 9 is for cooling the induction heating coil 5 and the power supply circuit 8.

  FIG. 3 is an exploded perspective view of a main part of the induction heating cooker according to the embodiment of the present invention, and shows a schematic configuration of the operation unit unit 10, the light guide plate 7, and the like.

  The control circuit board 11 includes a control circuit component for controlling the operation of the device by a signal from the operation unit 4, a control circuit component for controlling a display unit for displaying the operation state of the device, and the like. The first cover 12 and the second cover 13 cover the control circuit board 11 from above and below, respectively, and the control circuit board 11 is attached to the first cover by a first screw 14. 12 and the second cover 13 are fixed by a second screw 15 and accommodate the control circuit board 11.

  The light guide plate 7 has a light emitting surface 16 that emits light and irradiates the top plate 2 with substantially annular light, and a light receiving surface 18 that receives light from the light source 17. Since the light emission operation of the light guide plate 7 is the same as the conventional one, the description is omitted. Although the light guide plate is used as it is in the present embodiment, a case that covers the bottom and side surfaces of the light guide plate may be provided and housed in the case.

  In the present embodiment, the light source 17 is a light emitting diode in consideration of long life, but the light source is not particularly limited to this.

  The present embodiment is characterized in that the light source 17 is arranged in the light source mounting portion 19 provided in a part of the control circuit board 11. The supply of power for light emission and the like is performed via the lead wire 20 connected to the control circuit. In addition, the form of the light source attachment part 19 is not limited to this Embodiment.

  The first cover 12 is formed with a shielding wall 21 that partially covers the light irradiation from the light guide plate 7 to the top plate 2, and serves to adjust the light irradiation shape to the top plate 2. Plays.

  A convex portion 22 is formed on the light guide plate 7, and a hole 23, which is a positioning portion that fits the convex portion 22, is formed on the first cover 12.

  By adopting such a configuration, it is possible to determine at a glance that the top plate 2 emits light such as a ring and is being heated, and the cooked utensil can be easily placed at a predetermined position on the top plate 2. Even if a function for placing and improving usability is added, it is not necessary to newly provide a substrate dedicated to the light source 17, and lead wires for connecting to the substrate are also unnecessary.

  In the present embodiment, since the operation unit 4 is arranged on the top surface, the light source 17 provided on the control circuit 11 can be easily arranged at a position closer to the top plate 2.

  In the present embodiment, the first cover 12 that accommodates the control circuit board 11 covers a part of the light emitting surface 16 of the light guide plate 7 and partially blocks light irradiation to the top plate 2. By forming the wall, unnecessary portions of the irradiation light can be shielded without adding any parts.

  Further, in the present embodiment, the convex portion 22 is formed on the light guide plate 7, and the hole 23, which is a positioning portion that fits the convex portion 22, is formed in the first cover 12 that houses the control circuit board 11. By doing so, the light from the light source 17 can be accurately irradiated to a predetermined position of the light guide plate 7.

  As described above, the induction heating cooker according to the present invention can simplify the mounting structure of the light source that irradiates light to the light guide plate. It is useful as an application of an induction heating cooker or the like that displays the mounting position of light by using light.

The external view of the induction heating cooking appliance in one embodiment of this invention Exploded perspective view of the induction heating cooker The principal part exploded perspective view of the induction heating cooker Cross-sectional view of a conventional induction heating cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Top plate 4 Operation part 5 Induction heating coil 7 Light guide plate 8 Power supply circuit 10 Operation part unit 11 Control circuit 12 1st cover (cover)
13 Second cover (cover)
16 Light emitting surface 17 Light source
18 Light receiving surface 21 Wall 22 Convex part 23 Hole (positioning part)

Claims (3)

A main body constituting the outer shell, a top plate on which the cooked cooking utensil arranged on the top surface of the main body and made of a translucent material is placed, and an induction heating coil provided below the top plate, A power supply circuit that supplies high-frequency power to the induction heating coil, an operation unit having an operation unit disposed on the top surface of the main body, and light from a light source disposed below the top plate is received and guided by the light receiving surface. A light guide plate that emits light from the light emitting surface to display a position where the cooked utensil is placed , and the operation unit unit receives a signal from the operation unit. An induction heating cooker configured to house a control circuit board provided with a circuit for controlling the device and to provide the light source on the control circuit board. The operation unit includes a cover to which the control circuit board is attached and covers the control circuit board from above, and covers the light source and the light receiving surface from above and partially irradiates light from the light guide plate to the top plate. The induction heating cooker according to claim 1, wherein a wall is formed to block and shape a light irradiation shape to the top plate. 2. The light guide plate or the case for housing the light guide plate is formed with a convex portion or a concave portion in at least one of them and a positioning portion that fits into the convex portion or the concave portion is formed on a cover. The induction heating cooker described in 1.

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