JPH07182993A - Concentrated wire and deflection yoke using the same - Google Patents

Abstract

PURPOSE:To prevent slackening or separation of an element wires and obtain concentrated wires having a small space factor of the conductor. CONSTITUTION:Phenoxy resin with which melamine resin is compounded is directly applied to the outer circumference of a conductor 10 and a thermal hardening adhesive layer 11 is formed to become conductors 12 having the thermal hardening adhesive layer. On the other hand, polyester-imide resin is applied and baked to a conductor 13 and insulation conductors 15 having an insulation layer 14 is obtained. The conductors 12 having only the thermal hardening adhesive layer are mainly bundled with a plurality of insulated conductors 15 in parallel to the length direction, the bundled wires are heated, the insulated conductors 15 are embedded in the heat hardening adhesive layer 11, and the insulation layer and conductor 10 are fixed in close vicinity with each other. Nylon is applied and baked on the outer circumference of the bundled wires fixed by the thermal hardening adhesive layer 11 to become a thermal plastic adhesive layer 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency coil, and more particularly to a focusing wire for a deflection yoke which requires high definition and a deflection yoke using this focusing wire.

[0002]

2. Description of the Related Art Conventionally, as a winding used for a deflection yoke coil or the like, for example, a plurality of self-bonding enameled wires are twisted at a predetermined pitch in order to reduce the generation of eddy currents. The Litz wire manufactured by heat bonding was used. However, the litz wire has some drawbacks due to the twisting of enameled wires. First, when considering a litz wire of a certain length, the length of the enameled wire is increased by the amount of twisting, so the resistance is increased and the amount of heat generation is increased. And the other is that since each wire is fixed in a state where the enamel wires are twisted together, the flexibility is not sufficient, and therefore the workability during coil forming is low and when applied to a high-frequency coil with a complicated shape, the space factor There was a drawback that it decreased.

In order to solve these drawbacks, a focused electric wire has been devised in which the enameled wires are not twisted but are simply fixed in a circular shape. For example, Japanese Patent Laid-Open No. 62-18 shown in FIG.
As in No. 6446, the conductor 1 or the enamel wire 3 provided with the insulating jacket 2 on the conductor 1 is bundled and fixed by an adhesive layer of polyurethane, and the outer circumference thereof is surrounded by a jacket 5 of a thermoplastic resin. Consider the case of complex line 6. Since the composite wire 6 is a thermoplastic resin for both the adhesive layer 4 and the jacket 5, the composite wire 6 is formed at the stage of forming the jacket 5.
The adhesive layer 4 may be re-softened when heated, and the wires 1 and 2 in the composite wire 6 may be slackened or loosened. The slack and loosening may cause a disconnection accident during coil forming.

Therefore, for the purpose of preventing the occurrence of such slack and loosening, the coil electric wire 7 of JP-A-1-272007 shown in FIG. 3 was devised. The coil electric wire 7 is formed by bundling seven insulated conductor element wires 10 each having an insulation coating 9 on a conductor 8 and passing them through a thermosetting resin paint tank and baking them to form a thermosetting resin thin film layer 11. A bundle of these insulated conductor wires 10 is fixed in advance, and a thermoplastic resin fusion-bonding layer 12 is provided by coating and baking a thermoplastic resin a plurality of times on the outer periphery of the bundle. Thermosetting resin thin film layer 11
It is considered that it is efficient to manufacture the thermoplastic resin fusion bonding layer 12 in one step. In this case, the baking speed of each layer can be kept constant, but the thermoplastic resin fusion layer 1
Since 2 requires less energy for baking, it is necessary to use two baking furnaces or adjust the number of times of coating to make the baking degree of both layers appropriate. Therefore, the manufacturing process is complicated and the workability is low, and the thermosetting resin thin film layer 1
Since 1 is provided over the entire circumference, the space factor of the conductor is reduced, so that heat generation when the coil is used increases.

In view of the above points, it is an object of the present invention to provide a focused electric wire which prevents slackening and loosening of the wire and has a small conductor space factor.

[0006]

The focused electric wire of the present invention has a thermosetting adhesive layer formed on at least one of the conductors of a focused electric wire in which a plurality of conductors are bundled in parallel with each other in the longitudinal direction. It is characterized in that, around a conductor having a curable adhesive layer, an insulated conductor having an insulating layer is arranged on the conductor to form a wire bundle, and a thermoplastic adhesive layer is provided on the outer periphery of the wire bundle. .

The thermosetting resin used in the thermosetting adhesive layer of the present invention is preferably an aliphatic type and has a relatively low crosslink density, and does not soften at the melting temperature of the thermoplastic resin, such as epoxy resin and melamine. A curing agent is added to a thermosetting resin such as resin or phenoxy resin. A thermoplastic resin having a melting temperature higher than that of the thermoplastic adhesive layer used as the outermost layer may be used, but at present, many of them are insoluble in a usual varnish solvent and have not been put into practical use for winding.

The outermost layer of the focused electric wire of the present invention is coated with a thermoplastic resin having a melting temperature higher than the operating temperature of the coil formed by winding the focused electric wire. Polyamide resin can be mentioned as such a thermoplastic resin.

Further, in the present invention, polyurethane resin, polyester resin, polyester imide resin, polyimide resin or the like can be used for the insulating layer of the insulated conductor arranged around the conductor having the thermosetting adhesive layer, Of these, polyesterimide resin is particularly suitable for the deflection yoke.

The outer diameter of the conductor provided with the thermosetting adhesive layer is preferably equal to the outer diameter of the insulated conductor. The reason is that when the conductor having the thermosetting adhesive layer and the insulated conductor are bundled and then heated, the thermosetting resin is softened, and the surrounding insulated conductor is embedded and fixed in the thermosetting adhesive layer. The conductor provided with the thermosetting adhesive layer, the insulating layer, and the insulated conductor are in close contact with each other. Therefore, even when the conductor having the thermosetting adhesive layer at the center is not provided with the insulating layer, the surrounding insulated conductors are in close contact with each other, and sufficient insulation can be obtained. Furthermore, it is conceivable to provide a thermosetting insulating layer on the conductor and coat the thermosetting adhesive layer on the outer circumference, but the thermosetting insulating layer has a high crosslink density and requires a careful baking process after application. Therefore, the baking degree of the thermosetting insulating layer must be taken into consideration when the thermoplastic resin is applied and baked on the wire bundle. Therefore, from the viewpoint of workability during production or space factor, it is desirable to provide only the thermosetting adhesive layer on the conductor surrounded by the insulated conductor.

Further, in the deflection yoke of the invention according to claim 2, a thermosetting adhesive layer is provided on at least one of the plurality of conductors bundled in parallel in the length direction, and the thermosetting adhesive layer is provided. A conductor bundle having an insulating layer is arranged on the conductor around the conductor to form a wire bundle, and the bundled electric wire provided with a thermoplastic adhesive layer on the outer periphery of the wire bundle is formed by heating and fusing. Is characterized by. The deflection yoke is wound on the saddle-shaped space formed by, for example, a male type and a female type while stacking the focused electric wire according to claim 1, and then heating the focused electric wire by energization to heat the outermost thermoplastic adhesive layer. Melt the
Moreover, it is manufactured by cooling and solidifying while applying pressure to the saddle-shaped space.

[0012]

The focused electric wire of the present invention comprises a wire bundle formed by arranging an insulated conductor around a conductor having a thermosetting adhesive layer, and a thermoplastic adhesive layer provided on the outer periphery of the conductor. Since the layers are fixed, the thermosetting adhesive layer does not soften even if it is reheated in the process of manufacturing the thermoplastic adhesive layer.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. A phenoxy resin mixed with a melamine resin was directly applied to the outer periphery of the conductor 10 having a diameter of 0.150 mm to form a thermosetting adhesive layer 11, and a conductor 12 having this thermosetting adhesive layer was obtained. On the other hand, the conductor 13 having a diameter of 0.120 mm is coated with a polyesterimide resin and baked to have a thickness of 0.1.
An insulated conductor 15 having an insulating layer 14 of 015 mm was obtained.
Then, with the conductor 12 having only the thermosetting adhesive layer as the center, six insulated conductors 15 were bundled so as to be parallel to the length direction to form a wire bundle. The wire bundle is heated while applying pressure in the central direction until the phenoxy resin is softened, the insulating conductor 15 is embedded in the thermosetting adhesive layer 11, and the insulating layer 15 and the conductor 10 are closely fixed to each other. Thermosetting adhesive layer 11
Nylon is applied and baked on the outer periphery of the wire bundle fixed by the above so as to have a thickness of 0.010 mm.
It was set to 6.

[0014]

According to the focused electric wire of the present invention, since the conductor is fixed by the thermosetting resin, slack and dislocation are prevented,
It is possible to significantly reduce disconnection accidents during coil manufacturing. Further, since the thermosetting adhesive layer is provided on the conductor in advance, the space factor of the conductor is increased as compared with the case where it is provided on the entire wire bundle, and the workability in the focusing and resin coating steps is improved. Further, if the deflection yoke is formed by such a converging electric wire, a deflection yoke having a complicated shape can be molded, and a deflection yoke having a small resistance and a small heat generation amount can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional composite wire.

FIG. 3 is a cross-sectional view showing a conventional coil wire.

[Explanation of symbols]

 10, 13 ... Conductor 11 ... Thermosetting adhesive layer 12 ... Conductor having thermosetting adhesive layer 14 ... Insulating layer 15 ... Insulating conductor 16 ... Thermoplastic adhesive layer

Claims (2)

[Claims] 1. A focused electric wire in which a plurality of conductors are bundled in parallel to each other in a lengthwise direction, at least one of the conductors is provided with a thermosetting adhesive layer, and the periphery of the conductor having the thermosetting adhesive layer is provided. A bundled electric wire, wherein an insulated conductor having an insulating layer is arranged on the conductor to form a wire bundle, and a thermoplastic adhesive layer is provided on the outer periphery of the wire bundle. 2. A thermosetting adhesive layer is provided on at least one of a plurality of conductors bundled in parallel in a length direction, and an insulating layer is provided on the conductor around the conductor having the thermosetting adhesive layer. A deflection yoke, characterized in that an insulated conductor having the above is arranged to form a wire bundle, and a focused electric wire having a thermoplastic adhesive layer provided on the outer periphery of the wire bundle is heat-fused to form the wire bundle.