JP5890766B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  2. Description of the Related Art Conventionally, induction heating cookers are known in which rod-shaped ferrite cores are arranged radially below an electromagnetic induction heating coil (see, for example, Patent Document 1).

  However, the conventional induction heating cooker cannot prevent the magnetic field generated from the inverter from leaking to the outside. If the cylinder is made of a metal material, the cylinder itself may generate heat due to the magnetic field generated from the induction heating coil.

JP-A-8-256904

  An object of the present invention is to reduce leakage of a magnetic field to the outside while the exterior body is made of resin.

As a means for solving the above problems, the present invention provides:
Induction heating cooker,
An exterior body made of a synthetic resin material;
A heated body made of a metal material disposed in the exterior body;
Induction heating means for induction heating the heated object;
An annular member including a conductive material connected at least in an annular shape;
It is set as the structure provided with.

  With this configuration, even if the exterior body is made of synthetic resin, a back electromotive force is generated in the annular member due to the magnetic field that is about to leak to the outside, and a magnetic field that cancels the magnetic field is generated. Therefore, leakage of the magnetic field to the outside can be reduced. Further, since the annular member is only provided along the outer surface of the exterior body, the structure is simple and can be manufactured at low cost.

The annular member is
A decorative member attached to the exterior body;
Lead wires connected to both ends of the decorative member;
It is preferable to comprise.

  With this configuration, leakage of a magnetic field to the outside can be reduced by an inexpensive configuration in which a lead wire is added while effectively using a decorative member for appearance decoration already mounted on the exterior body.

The outer body consists of a cooker body and a lid,
The decorative member is attached to the cooker body,
The lead wire is preferably arranged in a dead space on the back side of the cooker body.

  With this configuration, it is possible to cope without requiring a special structural change for arranging the lead wires.

  The lead wire is preferably disposed in front of a substrate disposed on the back side of the cooker body.

  With this configuration, the influence of the magnetic field from the induction heating means on the substrate can be reduced.

The cooker body includes a fixed receiving portion for fixing both ends of the decorative member,
It is preferable that the lead wire is fixed to the fixed receiving portion together with both end portions of the decorative member, and is electrically connected to the decorative member.

  With this configuration, the portion originally used for fixing the decorative member can also be used for connecting the lead wires, the lead wire can be easily attached, and no structural changes can be required.

  The decoration member may be attached to the lid, and the lead wire may be disposed in the lid.

  With this configuration, leakage of the magnetic field can be reduced even on the lid side.

A magnetic shielding plate is disposed in front of the substrate;
The annular member is
A decorative member attached to the exterior body;
A magnetic shielding plate electrically connected to the decorative member;
It is preferable to comprise.

  With this configuration, the magnetic shielding plate that eliminates the influence of the magnetic field from the induction heating means on the substrate can also be used to reduce leakage of the magnetic field.

  According to the present invention, leakage of a magnetic field to the outside can be reduced by a simple and inexpensive configuration in which an annular member is provided for a synthetic resin exterior body.

It is a perspective view which shows the external appearance of the induction heating type cooking appliance which concerns on this embodiment. It is sectional drawing of the induction heating type cooking appliance of FIG. It is a disassembled perspective view of the 1st bottom member of the induction heating type cooking appliance of FIG. 1, a decoration member, a lead wire, and a screw. It is a fragmentary perspective view which shows the state which looked at the 1st bottom member of FIG. 3 from a different angle. It is a disassembled perspective view of the 1st bottom member of the induction heating type cooking appliance concerning other embodiments, a decoration member, a lead wire, and a screw.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the following description, terms indicating specific directions and positions (for example, terms including “up”, “down”, “side”, “end”) are used as necessary. Is for facilitating understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms. Further, the following description is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is an external perspective view of the induction heating cooker according to the present embodiment, and FIG. 2 is a cross-sectional view thereof. This induction heating type cooker includes a cooker body 1 and a lid 2, and an inner container 3 is accommodated therein.

  The cooker body 1 is made of a synthetic resin and includes a bottom member 4 and a shoulder member 5, and a decorative member 6 is disposed between the two.

The bottom member 4 includes a first bottom member 7 and a second bottom member 8.
As shown in FIG. 3, the first bottom member 7 has a notch 9 formed in the upper opening on the back side, and is thinner than the other parts at the upper end of the region (side surface and front surface) excluding the notch 9. The protruding ridge portion 10 is formed. Further, as shown in FIG. 4, two vertically long planes are formed on both side portions constituting the cutout portion 9 of the first bottom member 7, and the screw receiving portion protruding outward is formed at the upper end portion thereof. 11 is formed. A through hole 11a (which may have a female screw) is formed in the central portion of the screw receiving portion 11, and a screw 22 described later can be screwed together. As shown in FIG. 3, semicircular cutouts 12 are formed at the upper ends of both sides of the first bottom member 7, and shaft portions provided at both ends of the handle 13 are rotatably supported therein.

  In addition, as shown in FIG. 2, an induction heating coil 14 wound in a spiral shape is disposed on the inner bottom surface of the first bottom member 7, and radially extending ferrites 15 are disposed on the lower surface side thereof. The induction heating coil 14 and the ferrite 15 are held by a holding member 16. In addition, a trunk member 17 is mounted between the holding member 16 and the shoulder member 5 to form an accommodation space in which the inner container 3 can be accommodated.

  Further, on the back side of the first bottom member 7, a power supply substrate on which an inverter circuit and the like are formed, a substrate 18 on which a filter circuit is formed, and the like are disposed in a space formed by the body member 17 and the shoulder member 5. The

  The second bottom member 8 is attached to the first bottom member 7 and covers the bottom surface and the back surface thereof.

  The shoulder member 5 is attached to the upper opening of the first bottom member 7 and forms an internal space together with the trunk member 17.

  As shown in FIG. 3, the decorative member 6 is made of a synthetic resin material (for example, ABS resin) in a substantially U shape. On the upper and lower surfaces, groove portions 19 (the lower surface side is not shown) connected to both ends along the center line are formed. The protrusion 10 of the bottom member 4 is located in the groove on the lower surface side, and the decorative member 6 is positioned with respect to the bottom member 4. In this positioning state, the inner and outer surfaces of the decorative member 6 are flush with the inner and outer surfaces of the bottom member 4. Further, a protrusion (not shown) similar to the bottom member 4 formed on the shoulder member 5 is located in the groove portion 19 on the upper surface side, and is flush with the inner and outer surfaces of the shoulder member 5. At both ends of the decorative member 6, a thin circular mounting portion 20 that protrudes in the horizontal direction protrudes. A through hole 20 a is formed at the center of the attachment portion 20. The entire surface of the decorative member 6 is plated with nickel chrome.

  The attachment portion 20 of the decorative member 6 is positioned on the screw receiving portion 11 of the first bottom member 7, and the through holes 20a and 11a of both are communicated. Then, with the conductive portion 21 a of the lead wire 21 disposed on the top surface of the mounting portion 20, the shaft portion of the screw 22 is inserted into the through hole 20 a of the mounting portion 20 and screwed into the through hole 11 a of the screw receiving portion 11. To do. As a result, the lead wire 21 is connected between the head of the screw 22 and the upper surface of the mounting portion 20, and a conductive portion (annular member) connected in a ring shape by the decorative member 6 and the lead wire 21 is configured. It has become.

  Next, a part of the method for assembling the induction heating cooker having the above configuration will be described.

  First, the holding member 16 holding the induction heating coil 14, the ferrite 15, and the like is disposed on the bottom surface of the first bottom member 7. A body member 17 is disposed between the upper end portion of the holding member 16 and the shoulder member 5, and an internal space that can accommodate the inner container 3 is formed in the cooker body 1. Moreover, the board | substrate 18 grade | etc., Is accommodated in the back side of the cooking appliance main body 1, and the control board, a fan, etc. which are not shown in figure are accommodated in the front part.

  Subsequently, the decorative member 6 is attached to the first bottom member 7 to which the various components are attached. The decorative member 6 is temporarily fixed to the first bottom member 7 by positioning the protruding portion 10 of the first bottom member 7 in the groove on the lower surface side. In this state, the attachment portion 20 of the decorative member 6 is positioned on the screw receiving portion 11 of the first bottom member 7. Therefore, the screw 22 is screwed into the through hole 11a formed in the screw receiving part 11 of the first bottom member 7 through the through hole 20a formed in the attachment part 20 of the decorative member 6. At this time, in a state where the lead wire 21 is disposed in a dead space formed in front of the substrate 18, the lead wire portions 21 a at both ends thereof are sandwiched between the heads of the screws 22 and the attachment portions 20 of the decorative member 6. . As a result, a conductive portion (annular member) connected in an annular shape by the nickel chrome plating of the decorative member 6 and the lead wire 21 is formed.

  In this way, the connection of the lead wire 21 to the decorative member 6 is also performed by connecting the screw 22 that was originally used to fix the decorative member to the first bottom member 7 as it is. I am trying to use it. And the lead wire 21 is arrange | positioned in the dead space of the back side of the cooking appliance main body 1. FIG. Therefore, it is not necessary to make a special change to the configuration of the existing induction heating cooker, and the annular member can be obtained by simply adding the lead wire 21. And by the obtained annular member, it is reduced that the magnetic field which generate | occur | produced inside leaks outside the induction heating type cooking appliance. It is also possible to prevent the magnetic field generated from the induction heating coil 14 from adversely affecting the substrate 18.

  In addition, this invention is not limited to the structure described in the said embodiment, A various change is possible.

  For example, in the above-described embodiment, both ends of the decorative member 6 are connected by the lead wires 21, but they can be connected by other conductive members such as a copper plate. In this case, it is preferable that the conductive member is covered with an insulating material except for the connection portion with the decorative member 6.

  Moreover, in the said embodiment, although it was set as the structure which has electroconductivity by giving nickel chrome plating on the surface of the synthetic resin decoration member 6, you may comprise the decoration member itself with the metal material etc. which have electroconductivity. . Further, when the decoration member 6 is made of a metal material, the portions other than both ends may be covered with a resin or the like.

  Moreover, in the said embodiment, although the annular member was comprised by connecting electroconductive members, such as a lead wire, to the decoration member 6 provided in the cooking appliance main body side, as shown with a dashed-two dotted line in FIG. In addition, a conductive member may be connected to the decorative member 23 provided on the lid 2. In this case, the conductive member is preferably arranged inside the lid body 2. However, it is also possible to arrange outside along the lid 2. For example, the decoration member 23 may be provided on the lid 2 as a ring-connected configuration. Further, the decorative member 23 can be configured to be connected by a conductive member on the front side of the lid body 2 as described above.

  Moreover, in the said embodiment, although the decorative member 6 and the lead wire 21 comprised the cyclic | annular member which has electroconductivity, the cyclic | annular member does not necessarily need to be comprised with these and may comprise with another member. Is possible. For example, the annular member can be configured by disposing an annular conductive member on the inner peripheral surface of the first bottom member 7 or plating it.

  Moreover, in the said embodiment, although the bottom member 4 was comprised with the 1st bottom member 7 and the 2nd bottom member 8, these do not necessarily need to isolate | separate and may be an integral structure.

  Moreover, in the said embodiment, although it did not mention in particular about the structure of the front side of electronic components, such as the board | substrate 18, as shown in FIG. 5, it is preferable to arrange | position the magnetic-shield board 24. As shown in FIG. It is even more preferable that the magnetic shield plate and the decorative member 6 are connected by the lead wire 25 or that the magnetic shield plate 24 and the decorative member 6 are directly connectable. As a result, the influence of the magnetic field on the electronic component and the leakage of the magnetic field to the outside can be reduced.

  Moreover, in the said embodiment, although the case where the structure of this invention was employ | adopted as an induction heating type rice cooker was demonstrated, it can be employ | adopted by induction heating type cookers in general, such as an IH cooker.

  In the above-described embodiment, the lead wire portion 21a of the lead wire 21 is sandwiched between the head of the screw 22 and the mounting portion 20 of the decorative member 6. However, instead of the screw 22, a lead is used by a bolt and a nut. You may make it clamp the conducting wire part 21a of the wire | line 21, the attaching part 20 of the decoration member 6, and the screwing receiving part 11 of the 1st bottom member 7. FIG.

1 ... Cooker body (exterior body)
2 ... Cover body (exterior body)
3 ... Inner container (object to be heated)
4 ... bottom member 5 ... shoulder member 6 ... decorative member (annular member)
DESCRIPTION OF SYMBOLS 7 ... 1st bottom member 8 ... 2nd bottom member 9 ... Notch part 10 ... Projection part 11 ... Screwing receiving part 12 ... Notch 13 ... Handle 14 ... Induction heating coil (induction heating means)
DESCRIPTION OF SYMBOLS 15 ... Ferrite 16 ... Holding member 17 ... Body member 18 ... Board | substrate 19 ... Groove part 20 ... Mounting part 21 ... Lead wire (annular member)
22 ... Screw 23 ... Decorative member 24 ... Magnetic shield 25 ... Lead wire

Claims (6)

An exterior body made of a synthetic resin material;
A heated body made of a metal material disposed in the exterior body;
Induction heating means for induction heating the heated object;
An annular member including a conductive material connected at least in an annular shape ,
The annular member is
A decorative member attached to the exterior body;
Lead wires connected to both ends of the decorative member;
Induction heating cooker characterized by comprising the. The outer body consists of a cooker body and a lid,
The decorative member is attached to the cooker body,
The induction heating cooker according to claim 1, wherein the lead wire is disposed in a dead space on the back side of the cooker body. The induction heating cooker according to claim 2, wherein the lead wire is disposed in front of a substrate disposed on a back side of the cooker body. The cooker body includes a fixed receiving portion for fixing both ends of the decorative member,
The lead wire is fixed to the fixed receiving portion together with both ends of the decorative member, and the decorative portion
The induction heating type according to any one of claims 1 to 3, wherein the induction heating type is electrically connected to the material.
Cooking device. The decorative member is attached to the lid, and the lead wire is disposed in the lid.
The induction heating cooker according to claim 1, wherein A magnetic shielding plate is disposed in front of the substrate;
The annular member is
A decorative member attached to the exterior body;
A magnetic shielding plate electrically connected to the decorative member;
The induction heating cooker according to claim 3, comprising:

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