JP5041399B2 - Insulated wire, insulated wire composite wire and shielded wire - Google Patents

Description

  The present invention relates to an insulated wire having a plurality of enameled wire, an insulated wire composite wire having a plurality of insulated wires, and a shielded wire arranged around the insulated wire or the insulated wire composite wire. The present invention relates to an insulated wire, an insulated wire composite wire, and a shielded wire that have improved insulation and wiring workability without increasing the area of the radial cross section.

In general, enameled wires are often used for windings of electronic parts such as transformers and wires of insulated wires.
An enameled wire is an insulated conductor with a varnish for enameled wire applied to the outer periphery, but it is easy to process and inexpensive, and can be given various heat-resistant temperatures depending on the type of varnish. Yes.

As an application of the enameled wire, for example, a litz wire obtained by twisting a plurality of wires is used as a wire material such as a deflection yoke coil or a high frequency coil.
Insulated wires using a plurality of enamel wires as strands are used for audio cables, speaker cables, and the like, for example.
Furthermore, in recent years, earphones (earphone antennas) having an antenna function have been proposed (see, for example, Patent Documents 1 and 2), and some use an enameled wire as the central conductor.

By the way, as an insulated wire using an enameled wire as an element wire, for example, as shown in FIG. 8, there is one in which the outer periphery of a plurality of twisted enameled wires 110 is covered with an ultraviolet curable resin composition 120 or the like (for example, , See Patent Document 3).
In this technology, the ratio of isocyanate groups to hydroxy groups in the urethane-based UV curable resin is set to 5: 1 to 1: 1, and they are allophanate bonded effectively, so that the adhesive force by fusion between enamel wires is increased. It is something to enhance.
Japanese Patent Laying-Open No. 2005-064742 JP 2006-0774727 A Japanese Patent Laid-Open No. 7-114831 (FIG. 3)

  However, in the insulated wire 100 of FIG. 8, the cross-sectional area after coating with the ultraviolet curable resin composition 120 or the like was larger than the cross-sectional area before coating. In other words, the diameter was thick. Furthermore, when the insulated wire 100 is used for an insulated wire composite wire, the cross-sectional area of the composite wire is further increased. In addition, the insulated wires and composite wires having an increased cross-sectional area as described above have problems that they are inconvenient to handle and cannot contribute to downsizing of electronic devices.

  In addition, an insulated wire (hereinafter referred to as “conventional insulated wire”) in which a plurality of enameled wire is wound around a center line (for example, reinforcing fiber) is originally insulated by the enamel. ing. For this reason, when the winding process is performed around the center line, the enamel may be mechanically rubbed and damaged, and this portion is a cause of insulation deterioration.

  Furthermore, when a plurality of conventional insulated wires are twisted together or arranged in parallel and covered with insulation, it is considered that the above-mentioned factors causing the insulation deterioration approach each other, and the actual withstand voltage characteristics It was one of the causes of failure.

Here, as a method for solving these problems, it is conceivable to increase the thickness of the insulating film of each strand.
However, since the diameter of the insulated wire is increased, there is a problem that in this case, the handling becomes inconvenient and the electronic device cannot be reduced in size.

  Furthermore, when multiple conventional insulated wires are twisted together or arranged in parallel, the multiple enamel wires are spread apart when wiring to a pattern or terminal on the board by soldering or the like. Therefore, it is necessary to gather at the time of processing, which reduces wiring workability.

  The present invention has been considered in view of the above circumstances, and it is possible to improve insulation without increasing the radial cross-sectional area, and to improve workability when wiring an electric wire by soldering or the like. The object is to provide possible insulated wires, insulated composite wires and shielded wires.

  In order to achieve this object, the insulated wire of the present invention is an insulated wire having a plurality of enameled wire strands, a reinforcing fiber wire arranged together with the enameled wire strands, and a plurality of enameled wire strands. And the enamel coating layer applied to the outer periphery of the enamel element wire and / or the reinforcing fiber wire is within a range that does not exceed the minimum circle in which all the radial cross sections of the reinforcing fiber wire are accommodated.

When the insulated wire has such a configuration, the enamel coating layer is formed in a range not exceeding the minimum circle in which each radial cross section of the reinforcing fiber wire and the plurality of enameled wire strands can be accommodated. The area is not increased.
And since enamel is apply | coated also to the damaged part of the outer periphery of an enameled wire, the improvement of the insulation which fell can be aimed at.

Further, by applying enamel to the outer periphery of a plurality of enameled wire strands, the enameled wire strands can be fixed to each other. Thereby, it is possible to prevent the enameled wire from spreading during wiring by soldering or the like, and to improve wiring workability.
In addition, since the reinforcing fiber wire is disposed at the center, the strength of the insulated wire can be increased.

Moreover, the insulated wire of this invention can be set as the structure which distribute | arranged while twisting the enamel wire strand around the reinforcement fiber wire.
If an insulated wire is set as such a structure, intensity | strength can be raised compared with the case where several enameled wires are arrange | positioned in parallel.

Moreover, the insulated wire of this invention can be set as the structure which apply | coated the enamel application layer to the damaged part of the outer periphery of an enamel wire strand.
If the insulated wire has such a configuration, it is possible to improve the insulation that has been lowered due to the damaged portion.

Moreover, the insulated wire composite wire of this invention can be set as the structure by which the insulated wire in any one of Claims 1-3 was twisted together.
When the insulated wire composite wire has such a configuration, an insulated wire composite wire with improved insulation and wiring workability can be provided.

Moreover, the insulated wire composite wire of the present invention has a configuration in which a plurality of insulated wires according to any one of claims 1 to 3 are arranged in parallel and an insulator is provided outside the plurality of insulated wires. be able to.
When the insulated wire composite wire has such a configuration, an insulated wire composite wire with improved insulation and wiring workability can be provided.

Moreover, the shielded electric wire of this invention arrange | positions the insulated wire in any one of Claims 1-3, or the insulated wire composite wire of Claim 4 or 5 in the center of a radial direction cross section, or an insulated wire or It can be set as the structure which provided the shield layer in the outer side of the insulated wire composite wire.
If the shielded electric wire has such a configuration, a shielded electric wire with improved insulation and wiring workability can be provided.

  As described above, according to the present invention, since the enamel coating layer is formed in a range not exceeding the minimum circle in which each radial cross section of the reinforcing fiber wire and the plurality of enamel wire strands is contained, the insulated wire It is possible to repair a mechanically damaged portion of the enameled wire and a defective portion at the time of manufacturing the wire without increasing the cross-sectional area of the wire. Thereby, an insulation resistance can be increased and a withstand voltage characteristic can be improved.

In addition, since the enamel coating layer is formed on the outer periphery of the plurality of enameled wires, the enameled wires can be fixed. And this adhesion eliminates the spread of enameled wires during wiring by soldering or the like, so that the wiring workability can be improved.
Furthermore, when the insulated wire is soldered, the deterioration of the insulation resistance due to heat and the deterioration of the withstand voltage characteristics can be improved.

  Hereinafter, preferred embodiments of an insulated wire, an insulated wire composite wire, and a shielded wire according to the present invention will be described with reference to the drawings.

[Insulated wire]
First, an embodiment of the insulated wire of the present invention will be described with reference to FIG.
The figure is a cross-sectional view showing the configuration of the insulated wire of the present embodiment.
The insulated wire 1 a has a reinforcing fiber wire 11, an enameled wire 12, and an enamel coating layer 13.

The reinforcing fiber wire 11 is arranged at the center of the radial cross section of the insulated wire 1a in FIG.
For example, an aramid fiber can be used for the reinforcing fiber line 11.
Aramid fiber is an aromatic polyamide-based long fiber material that combines high strength and elasticity with low density and moderate internal loss.
The reinforcing fiber wire 11 is arranged at the center of the radial cross section of the insulated wire 1a in FIG. 1, but is not limited to this. For example, as shown in FIG. It may be arranged.

A plurality of the enamel wire 12 is arranged around the reinforcing fiber wire 11.
The enameled wire 12 can be arranged while being twisted around the reinforcing fiber wire 11. However, the enameled wire 12 can be arranged in parallel around the reinforcing fiber wire 11 without being twisted.
In FIG. 1, eight enameled wire 12 are arranged, but the number is not limited to eight, and any number can be arranged.

Examples of the type of the conductive wire of the enameled wire 12 include a copper wire and an aluminum wire.
As the varnish applied to the enameled wire 12, for example, polyurethane can be used. However, the varnish is not limited to polyurethane, and may be, for example, polyesterimide urethane, polyamideimide, polyesterimide, polyimide, polyester, polyvinyl formal, oil enamel, nylon overcoat varnish, and the like. Furthermore, a modified product can also be used.

The enamel coating layer 13 is provided on the outer periphery of the enameled wire 12 and the reinforcing fiber wire 11 within a range not exceeding the minimum circle 14 in which each radial cross section of the reinforcing fiber wire 11 and the plurality of enameled wire wires 12 is accommodated. It is a coated enamel layer.
Thus, by forming the enamel coating layer 13 within a range that does not exceed the circle 14, the cross-sectional area of the insulated wire 1a can be prevented from increasing. For this reason, handling becomes easy and it can contribute to size reduction of an electronic device.

Further, by forming the enamel coating layer 13, the enamel wire elements 12 can be fixed to each other (between the enamel wire element 12 and the reinforcing fiber line 11 in the insulated wire 1 b in FIG. 2).
Thereby, when wiring by soldering etc., the enameled wire 12 is not spread and wiring workability | operativity can be improved.

Moreover, the enamel coating layer 13 is applied to the damaged portion 15 of the enameled wire 12 as shown in FIG. Thereby, the mechanically damaged part of the enameled wire 12 or a defective part at the time of manufacturing the wire can be repaired.
Moreover, since the enamel application to the damaged portion 15 is within the range of the circle 14, the cross-sectional area of the insulated wire 1a does not increase.
Furthermore, when the damaged portions 15 of the enameled wire 12 approach each other, the withstand voltage characteristic is lowered. However, the damaged withstand portion 15 is repaired by the enamel coating layer 13, whereby the lowered withstand voltage characteristic can be improved.

  Moreover, as an enamel (varnish) used for the enamel coating layer 13, for example, polyurethane having insulation properties can be used. However, the enamel coating layer 13 is not limited to polyurethane, but can be one that can be used as a varnish of the enameled wire 12 (described above).

Here, when the insulated wire 1a of this embodiment is compared with the insulated wire 100 of FIG. 8, since the insulated wire 100 of FIG. 8 uses an ultraviolet curable resin or the like as the coating material, polyethylene or the like is used on the outer periphery of the conductor. However, there are many resins around the conductor that have inferior characteristics compared to high-frequency insulating materials, and the characteristics deteriorated when used for electric wires for high-frequency applications. On the other hand, since the insulated wire 1a of this embodiment uses polyurethane as a coating material, there is no deterioration in characteristics when used for a high-frequency wire.
The “circle” of “the smallest circle that can accommodate all radial cross-sections” is a closed planar figure without corners or cuts, and all of the tangents of this circle must pass outside the circle. Say. For this reason, the “circle” includes an ellipse in addition to a so-called perfect circle.

[Insulated wire composite wire]
Next, an embodiment of the insulated wire composite wire of the present invention will be described with reference to FIG.
This figure is a cross-sectional view showing the configuration of the insulated wire composite wire of the present embodiment.
As shown in the figure, the insulated wire composite wire 2a is an electric wire composed of a plurality of insulated wires 1a.
Thus, since the insulated wire composite wire 2a is composed of a plurality of insulated wires 1a, the insulated wire composite wire 2 with improved insulation and wiring workability can be obtained.

Moreover, the insulated wire composite wire 2 can be made into the structure which twisted together the several insulated wire 1a, as shown in FIG. Moreover, as shown in FIG. 6, it can also be set as the structure which arrange | positioned the several insulated wire 1a in parallel and formed the insulator 21 in these outer sides.
5 and 6, the number of the insulated wires 1a is seven, but the number is not limited to seven and may be an arbitrary number.

[Shielded wire]
Next, an embodiment of the shielded electric wire of the present invention will be described with reference to FIG.
This figure is a cross-sectional view showing the configuration of the shielded electric wire of the present embodiment.
As shown in the figure, the shielded wire 3 has one or a plurality of insulated wires 1a (in the case of a plurality of insulated wire composite wires) arranged as the central conductor 31 at the center of the radial cross section, It is an electric wire provided with an insulator 32, a shield (shield layer) 33, and a jacket 34 around it.
Also in this shielded electric wire 3, since the insulated wire 1a arrange | positioned in the center has the effect demonstrated by the above-mentioned [insulated electric wire], this shielded electric wire 3 can also obtain the effect.

The preferred embodiments of the insulated wire, insulated wire composite wire, and shielded wire of the present invention have been described above. However, the insulated wire, insulated wire composite wire, and shielded wire according to the present invention are not limited to the above-described embodiments. Needless to say, various modifications can be made within the scope of the present invention.
For example, although the insulated wire, the insulated wire composite wire, and the shielded wire have been described in the above-described embodiment, these insulated wires can be implemented as, for example, a litz wire, an audio cable, a speaker cable, an earphone antenna, or the like.
Also, a plurality of shielded electric wires can be provided to form a composite wire.

  Since this invention is an invention regarding the structure of an insulated wire, it is applicable to an insulated wire and various electric wires using the same.

It is sectional drawing which shows the structure of the insulated wire of this invention. It is sectional drawing which shows the other structure of the insulated wire of this invention. It is the elements on larger scale which show a mode that the enamel coating layer was formed in the damaged part of an enameled wire. It is sectional drawing which shows the structure of the insulated wire composite wire of this invention. It is a perspective view which shows that the insulated wire composite wire of this invention is a strand wire. It is a perspective view which shows that the insulated wire composite wire of this invention was a parallel line, and had an insulator on the outer side. It is sectional drawing which shows the structure of the shielded electric wire of this invention. It is sectional drawing which shows the structure of the conventional insulated wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Insulated electric wire 11 Reinforcement fiber wire 12 Enamel wire strand 13 Enamel coating layer 14 The smallest circle where all the radial cross sections of each strand are settled 15 Damaged part 2a, 2b, 2c Insulated wire compound wire 3 Shielded wire 31 Central conductor 33 Shield

Claims (6)

An insulated wire having a plurality of enameled wires,
A reinforcing fiber wire arranged together with the enameled wire,
The enamel coating layer applied to the outer circumference of the enamel wire and / or the reinforcing fiber wire in a range not exceeding a minimum circle in which each radial cross section of the plurality of enameled wire and the reinforcing fiber wire is not included. An insulated wire characterized by having The insulated wire according to claim 1, wherein the plurality of enameled wire elements are arranged while being twisted around the reinforcing fiber wire. The insulated wire according to claim 1 or 2, wherein the enamel coating layer is applied to a damaged portion on an outer periphery of the enamel wire. A plurality of insulated wires according to any one of claims 1 to 3, wherein a plurality of insulated wires are twisted together. A plurality of insulated wires according to any one of claims 1 to 3 are arranged in parallel,
An insulated wire composite wire characterized in that an insulator is provided outside the plurality of insulated wires. The insulated wire according to any one of claims 1 to 3 or the insulated wire composite wire according to claim 4 or 5 is disposed at the center of a radial cross section,
A shielded wire, wherein a shield layer is provided outside the insulated wire or the insulated wire composite wire.

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