JP2002015852A - Electromagnetic heating coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic heating coil, capable of keeping the coil shape without having to use a coil fixing support frame and a coil winding bobbin, having the high occupied area rate and superior tight-fitting property in relation to a fitting part and capable of miniaturizing a rice cooker (electromagnetic range) at a low cost. SOLUTION: This electromagnetic heating coil as a coil part 1B, formed by winding an insulated wire 2 into the prescribed shape and an opening part 1C. The coil part 1B is formed by spirally wrapping a film tape 4 with an adhesive layer around the periphery of an insulated wire 2A provided with a fluororesin coating 3, so that the adhesive layer 5 is arranged outside and that 1/4-1/2 of the tape 4 is lap-wound so as to form an overlap part 7. Adjacent coils of the coil part 1B are bonded for fixation by the adhesive layer 5, and while the insulate wire 2 is formed into a flat surface, and the coil part 1B is bonded directly to the fitting part of the electromagnetic heating coil for fixation.

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 An electromagnetic induction coil is used in an electromagnetic induction heating type rice cooker or electromagnetic cooker, and the electromagnetic heating coil is mounted on a mounting portion provided in the rice cooker or the electromagnetic cooker. For example, in the case of an electromagnetic heating coil 1A for an IH heater (induction heater) as shown in FIG. 4, an insulated wire 2A obtained by twisting 19 enamel wires having a wire diameter of 0.18 mm is wound with a winding portion 1B and an opening. The coil is concentrically wound while forming 1C, and the winding shape is maintained with an adhesive tape or the like to manufacture the electromagnetic heating coil 1A. Then, the electromagnetic heating coil 1A was mounted on the lid side (not shown) of the rice cooker. To the rice cooker lid side, the winding portion 1B is fixed in a groove 10 corresponding to the shape of the winding portion 1B provided in the coil fixing support frame 9 to maintain the winding shape. Was screwed and fixed to the rice cooker. As another means, an insulated electric wire is attached to a bobbin of a predetermined structure provided for the electromagnetic heating coil 1A winding.
2A was wound to maintain the winding shape and was attached to the rice cooker lid side.

Recently, demands for miniaturization of these rice cookers and electromagnetic cookers have increased, and there has been a demand for electromagnetic heating coils which are small in size and excellent in handleability and can meet these demands.

[0004]

By the way, in the above-mentioned electromagnetic heating coil, a winding frame is formed by using a supporting frame for fixing the coil and a bobbin for winding the coil for electromagnetic heating for mounting on a rice cooker or an electromagnetic cooker. It was necessary to attach it to the mounting part while holding it. For this reason, the size of the whole rice cooker (electromagnetic cooker) in the length direction, the width direction, or the height direction of the electromagnetic heating coil mounting portion becomes large, so that the size of the rice cooker (electromagnetic cooker) is reduced. Was extremely difficult. In addition, the space factor is low, there is a problem in adhesion to the mounting part, and the number of manufacturing processes is large, and rice cookers (electromagnetic cookers)
There was a disadvantage that it became expensive.

Accordingly, an object of the present invention is to maintain a winding shape without a coil fixing support frame and a coil winding bobbin, and to have an excellent space factor and excellent adhesion to a mounting portion. An object of the present invention is to provide an inexpensive electromagnetic heating coil that can reduce the size of a rice cooker (electromagnetic cooker).

[0006]

According to a first aspect of the present invention, there is provided an electromagnetic heating coil having a winding portion 1B formed by winding an insulated wire 2 in a predetermined shape and an opening 1C, wherein the insulated wire 2 is made of fluorine. A film tape 4 with an adhesive layer is wound around the outer periphery of the insulated wire 2A provided with the resin coating 3 in a spiral shape, and the adhesive layer 5 is formed on the outer side so as to form an overlapped portion 7 with a 1/4 to 1/2 lap winding. The insulated wire 2 is wound in a plane while the adjacent windings of the winding portion 1B are adhesively fixed by the adhesive layer 5, and the winding portion 1B is directly bonded and fixed to the mounting portion of the electromagnetic heating coil. To provide a coil for electromagnetic heating, characterized in that the coil is configured to: In the electromagnetic heating coil according to the first aspect, the adjacent windings of the winding portion 1B are flatly wound while being fixed by the adhesive layer 5, and the winding portion 1B is directly bonded and fixed to the mounting portion. Because of the configuration, the coil fixing support frame 9
And the winding shape can be maintained without the coil winding bobbin, and the winding portion 1B can be easily bonded and fixed to the mounting portion. In addition, it is possible to provide an electromagnetic heating coil that is thin, has excellent handleability, and is capable of responding to downsizing of a rice cooker (electromagnetic cooker).

According to a second aspect, there is provided an electromagnetic heating coil characterized in that the insulated wire 2 is made of a flat rectangular insulated wire. In the electromagnetic heating coil according to the second aspect, since the insulated wire 2 is a rectangular insulated wire, the adjacent windings of the winding portion 1B are closely adhered to each other and firmly fixed, and the winding shape can be maintained. It is possible to provide an electromagnetic heating coil excellent in the moment and the adhesion to the mounting portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. Note that the present invention is not limited to this. FIG. 1 is an explanatory view showing an example of an electromagnetic heating coil according to the present invention. FIG. 1 (a) is an explanatory view showing the configuration of an insulated wire, and FIG. 1 (b) is an external view of the electromagnetic heating coil. (c) is a sectional view taken along line XX of (b) of FIG. FIG.
It is explanatory drawing which shows the structure of the flat insulated wire used for this invention. FIG. 3 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 2, wherein FIG. 3 (a) is an external view of the electromagnetic heating coil, and FIG. It is a XX sectional view.

First Embodiment As shown in FIG. 1, 19 tin-plated copper alloy wires 6 each having a wire diameter of 0.18 mm are twisted, and the outer periphery thereof is extruded with a tube to form a fluororesin coating 3 having a thickness. An insulated wire 2A provided at 0.13 mm was manufactured.

Next, a film tape 4 with an adhesive layer having a thickness of 12 μm is spirally wound around the outer periphery of the insulated wire 2A with a wrapping portion 7 and the adhesive layer 5 is set outside to form a half wrap. 2 was produced.

Then, using a winding form (not shown), the insulated wire 2 was wound concentrically to form a planar electromagnetic heating coil 1 having a winding portion 1B and an opening 1C. In this electromagnetic heating coil 1, the adjacent windings of the winding portion 1B are bonded and fixed to each other by the adhesive layer 5 of the film tape 4 with an adhesive layer. be able to. Further, mounting on the rice cooker side can be easily performed only by directly bonding and fixing the adhesive layer 5 of the winding portion 1B to the mounting portion, and a thin electromagnetic heating coil 1 that can be adapted to miniaturization of the rice cooker is obtained. Was.

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

Next, a film tape 4 with an adhesive layer having a thickness of 12 μm is spirally wound around the outer periphery of the insulated wire 2A while forming an overlapped portion 7 and the adhesive layer 5 is turned outside, and the insulated wire 2A is wound by 1/4 lap. Was manufactured.

Then, a predetermined number of insulated wires 2 are wound concentrically using a winding form (not shown), as shown in FIG.
A planar electromagnetic heating coil 1 having a winding portion 1B and an opening 1C was formed. In the electromagnetic heating coil 1, adjacent windings of the winding portion 1B are firmly adhered and fixed to each other by an adhesive layer 5 of a film tape 4 with an adhesive layer, so that the winding shape can be strongly maintained even when removed from a winding die. In addition, a thin electromagnetic heating coil 1 which can be firmly adhered and fixed to the mounting portion of the rice cooker by surface contact via the adhesive layer 5 of the winding portion 1B, and which can cope with downsizing of the rice cooker is obtained. In addition, since the insulated wire 2A is formed of a rectangular conductor, the electromagnetic heating coil 1 in which the winding shape is more firmly maintained than in the first embodiment can be obtained.

In the coil for electromagnetic heating thus obtained, the adjacent windings of the winding portion are firmly bonded and fixed to each other by the adhesive layer of the film tape with an adhesive layer.
A thin electromagnetic heating coil that can maintain the winding shape without a coil fixing support frame or a coil winding bobbin, is easy to mount, and can reduce the size of a rice cooker is obtained. Further, since an insulated wire provided with a fluororesin coating is used, an electromagnetic heating coil having excellent insulation properties in a high-temperature and high-humidity atmosphere can be obtained. In addition, the use of the flat insulated wire increases the adhesive force between the windings and the mounting portion, so that it is possible to provide an electromagnetic heating coil that can be further miniaturized and has an increased space factor.

[0016]

According to the present invention, a thin electromagnetic heating coil that can maintain a winding shape without a coil fixing support frame or a coil winding bobbin and that can reduce the size of a rice cooker is simplified. Obtained by various means. In addition, an electromagnetic heating coil having a small size, an improved space factor, excellent handling properties, and excellent insulation properties in a high-temperature, high-humidity atmosphere can be obtained. There is a great practical effect.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of an electromagnetic heating coil according to the present invention. FIG. 1 (a) is an explanatory view showing the configuration of an insulated wire, and FIG.
(b) is an external view of the electromagnetic heating coil, and (c) is an X in FIG.
-It is an X-ray sectional view.

FIG. 2 is an explanatory diagram showing a configuration of a rectangular insulated wire used in the present invention.

FIG. 3 is an explanatory view showing an example of an electromagnetic heating coil using the insulated wire of FIG. 2; FIG. 3 (a) is an external view of the electromagnetic heating coil, and FIG. It is a XX sectional view.

FIG. 4 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 1B Winding part 1C Opening 2,2A Insulated wire 3 Fluororesin coating 4 Film tape with adhesive layer 5 Adhesive layer 6 Tinned copper alloy wire 7 Overlapping part 8 Flat copper wire 9 Support for coil fixing Frame 10 groove

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01F 5/06 H01F 5/06 H 27/32 27/32 Z H02J 17/00 H02J 17/00 B (72 Inventor Chihiro Kobayashi 300 Oya, Ueda-shi, Nagano F-term in Ueda Plant of Tokyo Special Electric Cable Co., Ltd.F-term (reference)

Claims (2)

[Claims] 1. A winding portion formed by winding an insulated wire 2 into a predetermined shape.
1B and an electromagnetic heating coil having an opening 1C, wherein the insulated wire 2 is an insulated wire provided with a fluororesin coating 3.
The film tape 4 with an adhesive layer is spirally wound around the outer periphery of 2A and the overlapped portion 7 is formed with the adhesive layer 5 on the outside, and is wound by 1/4 to 1/2 lap. The insulated wire 2 is wound in a planar manner while the adjacent windings of the portion 1B are bonded and fixed, and the winding portion 1B is directly bonded and fixed to the mounting portion of the electromagnetic heating coil. Coil for electromagnetic heating. 2. The electromagnetic heating coil according to claim 1, wherein the insulated wire 2 is a flat rectangular insulated wire.