JP2000082579A - Coil for electromagnetic heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized component excellent in space factor and in adhesiveness to a mounting surface, by sandwichingly fixing a flat coil made up by winding an insulated wire, with its winding shape held, between an insulating film and an adhesive double coated tape. SOLUTION: A flat coil 5 is formed by concentrically winding a rectangular fluororesin-insulated wire 2 by using a coil former. One surface of the flat coil 5 is fixed on one surface of an adhesive double coated film 6 cleared of separate paper while an insulating film 7 or polyester film with an adhesive layer is bonded to the flat coil 5 and to the adhesive double coated film 6, thus a coil 1 for electromagnetic heating is obtained with its winding shape held. The coil 1 for electromagnetic heating thus obtained is capable of rigidly holding the winding shape without any frame, has an improved space factor because of its small size, and is excellent in handling property and low in cost. The coil 1 for electromagnetic heating obtained is excellent not only in insulation properties in a high-temperature/high-humidity atmosphere but in handling property because of its simple structure, and greatly contributes to size reduction and cost reduction of rice cookers and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic heating coil used in, for example, an electromagnetic induction heating type rice cooker or an electromagnetic cooker.

[0002]

2. Description of the Related Art Conventionally, electromagnetic heating coils have been used in rice cookers and electromagnetic cookers of the electromagnetic induction heating type. Generally, this type of electromagnetic heating coil is fixed by winding a coil portion around a bobbin or attaching it to a support frame for fixing the coil with an adhesive tape or the like. For example, in an electromagnetic heating coil 1A for an IH heater (induction heater) arranged and used on a lid side of a rice cooker, as shown in FIG. 5, the electromagnetic heating coil 1A provided on a support frame 10 is attached. Press the electromagnetic heating coil 1A into the groove 11 for
10 was fixed to the rice cooker with screws or the like.

On the other hand, recently, there has been an increasing demand for miniaturization of these rice cookers and electromagnetic cookers, and there is a demand for electromagnetic heating coils which are small and have excellent handleability.

[0004]

However, the conventional electromagnetic heating coil requires a support frame and therefore has a large shape, which complicates and enlarges the structure of the rice cooker, has a low space factor, and has a small mounting surface. And the number of manufacturing steps is large and there is a problem that it is expensive.

An object of the present invention is to provide an inexpensive electromagnetic heating coil which is small in size and excellent in space factor and adhesion to a mounting surface.

[0006]

According to a first aspect, a planar coil 5 formed by winding an insulated wire 2 is sandwiched and fixed between an insulating film 7 and a double-sided adhesive tape 6 so as to maintain the winding shape. A heating coil 1 is provided. Since the planar coil 5 is configured to be sandwiched and fixed by the insulating film 7 and the double-sided adhesive tape 6, it can be easily fixed to the mounting surface by the double-sided adhesive tape 6. Further, it is possible to provide an inexpensive electromagnetic heating coil having excellent adhesion to the mounting surface.

In the second aspect, by forming the insulated wire 2 from a flat rectangular insulated wire, the windings are easily brought into close contact with each other, the electromagnetic heating coil 1 can hold the winding shape more firmly, and is compact and occupied. No. 1 with further improved efficiency and adhesion to the mounting surface
The electromagnetic heating coil according to the aspect of the invention can be provided.

In a third aspect, an electromagnetic heating coil according to the first aspect having excellent insulation properties in a high-temperature and high-humidity atmosphere is provided by providing a configuration in which a fluororesin coating 4 is provided on an insulated wire 2. be able to.

In a fourth aspect, the film tape 7A with an adhesive layer is wound around the outer periphery of the insulated wire 2 in a spiral shape with the adhesive layer facing out, so that the insulated wire 2 is electromagnetically heated by the bonding between the adhesive layers. The coil for use 1 can hold the winding shape more firmly, and can provide the coil for electromagnetic heating of the 1st viewpoint which further improved the adhesiveness with the mounting surface.

According to a fifth aspect, by providing a structure in which an adhesive layer is provided on the insulating film 7, the electromagnetic heating coil is more securely held and fixed in a winding shape. A coil can be provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. Note that the present invention is not limited by this.

{First Embodiment} As shown in FIG. 1, a tin-plated copper alloy wire 3 having a wire diameter of 0.18 mm is used.
Nineteen strands were twisted, and an insulated wire 2 having an insulating coating 4 made of polyethylene resin or the like having a thickness of 0.13 mm was produced by tube extrusion coating on the outer periphery thereof.

Next, the insulated wire 2 was wound concentrically using a winding form (not shown) to form a planar coil 5 as shown in FIG. 2 (a). Then, as shown in FIG. 2 (b), one side of the planar coil 5 temporarily fixed with, for example, an adhesive tape is fixed on one side of the double-sided adhesive film 6 from which the release paper has been removed, and the polyester film 7 having an adhesive layer is provided. Was adhered to the planar coil 5 and the double-sided adhesive film 6 from the other side of the planar coil 5 to obtain the coil 1 for electromagnetic heating maintaining the winding shape.

{Second Embodiment} As shown in FIG. 3 (a), using a conventional rolling mill (not shown) for rolling a round conductor to obtain a flat conductor, as shown in FIG. , Width
The 1.25-mm rectangular soft copper wire 8 is manufactured. Then, as shown in FIG. 3 (b), a fluororesin insulated wire 2A having a fluororesin (FEP) coating 4 provided at a thickness of 0.13 mm on the outer periphery of the rectangular soft copper wire 8 was manufactured by tube extrusion coating.

Next, a 12 μm-thick polyester film tape 7A with an adhesive layer is wound spirally with the adhesive layer on the outside while forming an overlapping portion 9 on the outer periphery of the rectangular fluororesin insulated wire 2A. 2 was produced.

Then, the rectangular fluororesin insulated wire 2 was concentrically wound using a winding form (not shown) to form a planar coil 5 as shown in FIG. 4 (a). One surface of the planar coil 5 is fixed on one surface of the double-sided adhesive film 6 from which the release paper has been removed, and the polyester film 7 with an adhesive layer is attached to the planar coil 5 and the double-sided adhesive film from the other surface of the planar coil 5. 6 was obtained, and an electromagnetic heating coil 1 having a winding shape as shown in the sectional view of FIG. 4B was obtained.

The coils for electromagnetic heating according to Embodiments 1 and 2 obtained in this way have a configuration in which the planar coil is sandwiched and fixed by the insulating film and the double-sided adhesive tape, so that the winding shape is maintained without the support frame. Is done. In addition, since it can be fixed to the mounting surface with a double-sided adhesive tape, an inexpensive electromagnetic heating coil excellent in mounting workability can be obtained.
If a flat rectangular insulated wire is used, the windings will be in close contact with each other.
In addition to obtaining a compact electromagnetic heating coil with an improved space factor, the use of a fluororesin-coated insulated wire makes it possible to provide an electromagnetic heating coil with excellent insulation properties in a high-temperature, high-humidity atmosphere. Become. In addition, by winding a film tape with an adhesive layer around the outer periphery of the insulated wire in a spiral shape and the adhesive layer on the outside, the winding shape of the planar coil itself is further firmly fixed by the insulating film and the double-sided adhesive tape. Coil is obtained. Further, by using an insulating film provided with an adhesive layer, it is possible to obtain an electromagnetic heating coil in which the winding shape of the planar coil itself is more firmly fixed.

[0018]

According to the present invention, an inexpensive electromagnetic heating coil which can maintain the winding shape strongly without the support frame, is small in size, has an improved space factor, and is excellent in handleability is obtained. In addition to obtaining an electromagnetic heating coil with excellent insulation properties in a high-temperature, high-humidity atmosphere, it has a simple structure and is easy to handle, contributing to downsizing and cost reduction of rice cookers. Yes, its practical effect is significant.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an insulated wire used in the present invention.

FIG. 2 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 1; FIG. 2 (a) is an explanatory view of a planar coil;
FIG. 2B is a cross-sectional view showing the configuration of the electromagnetic heating coil.

FIG. 3 is an explanatory view showing an example in which a rectangular wire is used as an insulated wire. FIG. 3 (a) is a cross-sectional view of a rectangular soft copper wire, and FIG. 3 (b) is a diagram illustrating a rectangular wire coated with fluororesin (FEP) and bonded. It is explanatory drawing which shows the rectangular-shaped fluororesin insulated wire which wound the polyester film tape with a layer in the spiral shape and the adhesive layer outside.

FIG. 4 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 3; FIG. 4 (a) is an explanatory view of a planar coil;
FIG. 2B is a cross-sectional view showing the configuration of the electromagnetic heating coil.

FIG. 5 is an explanatory view showing a conventional example of a support frame used for mounting an electromagnetic heating coil.

[Explanation of symbols]

 1,1A Electromagnetic heating coil 2 Insulated wire 3 Tinned copper alloy wire 4 Insulation coating 5 Planar coil 6 Double-sided adhesive film 7 Insulating film 7A Film tape with adhesive layer 8 Rectangular soft copper wire 9 Overlapping part 10 Support frame 11 Groove

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[Procedure amendment]

[Submission date] September 24, 1998 (1998.9.2)
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Electromagnetic heating coil

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic heating coil used in, for example, an electromagnetic induction heating type rice cooker or an electromagnetic cooker.

[0002]

2. Description of the Related Art Conventionally, electromagnetic heating coils have been used in rice cookers and electromagnetic cookers of the electromagnetic induction heating type. In general, this kind of electromagnetic heating coil has a coil portion was fixed attached by or is wound on a bobbin, contact adhesive tape or the like to the support frame for the coil fixing. For example, in an electromagnetic heating coil 1A for an IH heater (induction heater) disposed and used on a lid side of a rice cooker, an electromagnetic heating coil 1A provided on a support frame 10 is attached as shown in FIG. Press the electromagnetic heating coil 1A into the groove 11 for
10 was fixed to the rice cooker with screws or the like.

On the other hand, recently, there has been an increasing demand for miniaturization of these rice cookers and electromagnetic cookers, and there has been a demand for electromagnetic heating coils that are small and have excellent handleability.

[0004]

However, the conventional electromagnetic heating coil requires a support frame and therefore has a large shape, which complicates and enlarges the structure of the rice cooker, has a low space factor, and has a small mounting surface. And the number of manufacturing steps is large and there is a problem that it is expensive.

An object of the present invention is to provide an inexpensive electromagnetic heating coil which is small in size and excellent in space factor and adhesion to a mounting surface.

[0006]

According to a first aspect, a planar coil 5 formed by winding an insulated wire 2 is sandwiched and fixed between an insulating film 7 and a double-sided adhesive tape 6 so as to maintain the winding shape. Construct an electromagnetic heating coil.

[0007] In a second aspect, an electromagnetic heating coil is constituted by an insulated wire 2 made of a rectangular insulated wire.

[0008] In a third aspect, to an electromagnetic heating coil is insulated wire 2 having a fluorine resin coating 4.

In a fourth aspect, an electromagnetic heating coil is constituted by an insulated wire 2 wound around a film tape 7A with an adhesive layer on the outer periphery in a spiral shape with the adhesive layer on the outside.

In a fifth aspect, the electromagnetic heating coil is sandwiched and fixed by the insulating film 7 provided with the adhesive layer.

[0011]

According to the first aspect, since the planar coil 5 is sandwiched and fixed by the insulating film 7 and the double-sided adhesive tape 6, the winding shape can be maintained without the support frame, and the double-sided adhesive is attached to the mounting surface. It is easily fixed by the tape 6. Further, it is possible to provide an inexpensive electromagnetic heating coil having excellent adhesion to the mounting surface.

In the second aspect, the use of a rectangular insulated wire as the insulated wire 2 facilitates close contact between the windings, the electromagnetic heating coil 1 can hold the winding shape more firmly, and is compact and occupied. The electromagnetic heating coil according to the first aspect, in which the efficiency and the adhesion to the mounting surface are further improved, can be provided.

According to a third aspect, there is provided an electromagnetic heating coil according to the first aspect having excellent insulation properties in a high-temperature and high-humidity atmosphere by using the insulated wire 2 provided with the fluororesin coating 4. Can be.

In the fourth aspect, since the film tape 7A with an adhesive layer is wound around the outer periphery of the insulated wire 2 in a spiral shape with the adhesive layer on the outside, the electromagnetic heating coil is formed by bonding the insulated wires 2 to each other. The first type, which can hold the winding shape of 1 more firmly and has improved adhesion to the mounting surface
The electromagnetic heating coil according to the aspect of the invention can be provided.

According to a fifth aspect, there is provided the electromagnetic heating coil according to the first aspect, in which the insulating film 7 is provided with an adhesive layer, so that the electromagnetic heating coil is fixed while holding the winding shape more firmly. can do.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. Note that the present invention is not limited by this.

First Embodiment As shown in FIG. 1, nineteen tin-plated copper alloy wires 3 each having a wire diameter of 0.18 mm are twisted, and the outer periphery thereof is covered with a tube by extrusion to insulate a polyethylene resin or the like. An insulated wire 2 provided with a coating 4 having a thickness of 0.13 mm was manufactured.

Next, the insulated wire 2 was concentrically wound using a winding form (not shown) to form a planar coil 5 as shown in FIG. 2A. Then, as shown in FIG. 2B, for example, one side of the planar coil 5 temporarily fixed with an adhesive tape is fixed on one side of the double-sided adhesive tape 6 from which the release paper has been removed, and an adhesive layer is formed as an insulating film 7. The attached polyester film was adhered to the planar coil 5 and the double-sided adhesive tape 6 from the other side of the planar coil 5 to obtain the coil 1 for electromagnetic heating maintaining the winding shape.

<< Second Embodiment >> As shown in FIG. 3 (a), using a conventional rolling mill (not shown) for rolling a round conductor to obtain a rectangular conductor, as shown in FIG. The flat copper wire 8 having a width of 1.25 mm is manufactured. Then, as shown in FIG. 3 (b), a fluororesin insulated wire 2A having a fluororesin (FEP) coating 4 provided at a thickness of 0.13 mm on the outer periphery of the rectangular soft copper wire 8 was manufactured by tube extrusion coating.

Next, a 12 μm-thick polyester film tape 7A with an adhesive layer is wound spirally with the adhesive layer on the outside while forming an overlapping portion 9 on the outer periphery of the rectangular fluororesin insulated wire 2A. 2 was produced.

Then, the flat fluororesin insulated wire 2 was concentrically wound using a winding form (not shown) to form a planar coil 5 as shown in FIG. 4A. One side of the planar coil 5 is fixed on one side of the double-sided adhesive tape 6 from which the release paper has been removed, and a polyester film with an adhesive layer is used as an insulating film 7 with the planar coil 5 from the other side of the planar coil 5. Adhere to double-sided adhesive tape 6,
An electromagnetic heating coil 1 having a winding shape as shown in the sectional view of FIG. 4B was obtained.

The electromagnetic heating coils according to Embodiments 1 and 2 obtained in this manner have a configuration in which a planar coil is sandwiched and fixed by an insulating film and a double-sided adhesive tape.
The winding shape is maintained without the support frame. In addition, since it can be fixed to the mounting surface with a double-sided adhesive tape, an inexpensive electromagnetic heating coil excellent in mounting workability can be obtained. If a rectangular insulated wire is used, the windings will be in close contact with each other, so that a more compact electromagnetic heating coil with an improved space factor can be obtained. It is possible to provide an electromagnetic heating coil having excellent insulation properties in the inside. In addition, by winding a film tape with an adhesive layer around the outer periphery of the insulated wire in a spiral shape and the adhesive layer on the outside, the winding shape of the planar coil itself is further firmly fixed by the insulating film and the double-sided adhesive tape. Coil is obtained. Further, by using an insulating film having a contact adhesive layer, in which the electromagnetic heating coil has windings shape of the planar coil itself is further firmly fixed obtained.

[0023]

According to the present invention, an inexpensive electromagnetic heating coil which can maintain the winding shape strongly without the support frame, is small in size, has an improved space factor, and is excellent in handleability is obtained. In addition to obtaining an electromagnetic heating coil with excellent insulation properties in a high-temperature, high-humidity atmosphere, it has a simple structure and is easy to handle, contributing to downsizing and cost reduction of rice cookers. Yes, its practical effect is significant.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an insulated wire used in the present invention.

FIG. 2 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 1; FIG. 2 (a) is an explanatory view of a planar coil, and FIG. FIG.

FIG. 3 is an explanatory view showing an example of using a rectangular wire as an insulated wire. FIG. 3A is a cross-sectional view of a rectangular soft copper wire, and FIG. It is explanatory drawing which shows the rectangular-shaped fluororesin insulated wire which wound the polyester film tape with a layer in the spiral shape and the adhesive layer outside.

4 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 3; FIG. 4 (a) is an explanatory view of a planar coil, and FIG. FIG.

FIG. 5 is an explanatory view showing a conventional example of a support frame used for mounting an electromagnetic heating coil.

[Description of Signs] 1,1A Electromagnetic heating coil 2 Insulated wire 3 Tinned copper alloy wire 4 Insulation coating 5 Flat coil 6 Double-sided adhesive tape 7 Insulating film 7A Film tape with adhesive layer 8 Flat rectangular copper wire 9 Overlapping part 10 Support Frame 11 groove

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Claims (5)

[Claims] 1. A coil for electromagnetic heating, wherein a planar coil 5 formed by winding an insulated wire 2 is sandwiched and fixed between an insulating film 7 and a double-sided adhesive tape 6 while maintaining the winding shape. 2. The electromagnetic heating coil according to claim 1, wherein the insulated wire 2 is a rectangular insulated wire. 3. The electromagnetic heating coil according to claim 1, wherein the insulated wire is provided with a fluororesin coating. 4. The coil for electromagnetic heating according to claim 1, wherein the film tape 7A with an adhesive layer is wound around the outer periphery of the insulated wire 2 in a spiral shape with the adhesive layer outside. . 5. The electromagnetic heating coil according to claim 1, wherein the insulating film is provided with an adhesive layer.