JP2015153457A - Shield electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a proper shield body according to various kinds of requirement specifications such as weight saving and shield performance, in a shield electric wire having the shield body.SOLUTION: A shield electric wire 11 comprises a main electric wire 20 and a shield body 30. The shield body 30 has plural kinds of surrounding electric wires 31 which are concentrated in such a state as to surround the main electric wire 20. The surrounding electric wires 31 respectively have a linear conductor including a different metal material. All of the plural kinds of surrounding electric wires 31 or residual surrounding electric wires 31 except for one kind are an insulation electric wire including a core wire 310 including the linear conductor and an insulation coating 311 covering the core wire 310.

Description

  The present invention relates to a shielded electric wire including a plurality of electric wires and a shield body that collectively covers the plurality of electric wires.

  A wire harness wired to a vehicle such as an automobile may include a shielded electric wire having a main electric wire to be shielded and a conductive shield body that collectively covers the main electric wire. The shield body surrounds the main electric wire and shields electromagnetic noise.

  For example, the shielded electric wire shown in Patent Document 1 includes a shield body formed in a cylindrical shape by knitting a metal linear conductor.

  On the other hand, the shielded electric wire shown in Patent Document 2 includes an integral cylindrical shield body composed of insulated wires arranged in parallel in the same direction as the plurality of main wires around the plurality of main wires.

  As the electric wire used for the shield body, a metal linear conductor (tin-plated copper wire) in which tin plating is usually formed on a core wire mainly composed of copper is conceivable. Moreover, as shown in Patent Document 2, an enameled wire in which enamel is coated on the surface of a copper wire may be used for the shield body.

JP 2011-165356 A JP 2009-283359 A

  In shielded wires, the use of a shield body containing a high-density metal linear conductor such as copper and iron at a high density is contrary to the recent demand for weight reduction of vehicles. On the other hand, copper wire has low electrical resistance and inductance, and iron, which is a magnetic material, has excellent magnetic shielding performance. Therefore, there are cases where it is desired to employ a metal having excellent properties as a shield body even if the specific gravity is large.

  An object of the present invention is to provide an appropriate shield body according to various required specifications such as weight reduction and shield performance in a shielded electric wire including a shield body.

  The shielded electric wire according to the first aspect includes a main electric wire to be shielded and a shield body. The shield body includes a plurality of types of surrounding electric wires that are gathered so as to surround the main electric wire. The plurality of types of surrounding electric wires have linear conductors including different metal materials. All of the plurality of types of the surrounding electric wires or all of the remaining ones except the one type are insulated wires having a core wire including the linear conductor and an insulating coating covering the periphery of the core wire.

  The shielded electric wire according to the second aspect is an aspect of the shielded electric wire according to the first aspect. In the shielded electric wire according to the second aspect, the shield body has a structure in which a plurality of identical shield twisted wires each including a plurality of types of the surrounding electric wires twisted together are gathered to surround the main electric wire.

  The shielded electric wire according to the third aspect is one aspect of the shielded electric wire according to the first aspect or the second aspect. In the shielded electric wire according to the third aspect, each of the plurality of types of surrounding electric wires has the insulating coating of a different color for each type.

  The shielded electric wire according to the fourth aspect is one aspect of the shielded electric wire according to any one of the first to third aspects. In the shielded electric wire according to the fourth aspect, the insulating coating of the surrounding electric wire has a plurality of laminated coating layers. And the outermost said coating layer contains the synthetic resin whose self-lubricating property is higher than the synthetic resin which the said other said coating layer contains.

  According to each of the above aspects, the shielded electric wire includes the main electric wire and a shield body including a plurality of types of surrounding electric wires gathered in a state surrounding the main electric wire.

  In each of the above aspects, the plurality of types of surrounding electric wires have linear conductors containing different metal materials. In this case, depending on the combination of the metal materials used for the linear conductor included in the core wire, for example, a shielded electric wire with a specific gravity for reducing the weight of the shield body or a shielded electric wire with a specific gravity for improving shielding performance in the high frequency band, etc. Can be made arbitrarily.

  In each of the above aspects, all of the plurality of types of surrounding electric wires or all of the remaining ones except for one type are insulated wires having a core wire including a linear conductor and an insulating coating covering the periphery of the core wire. In this case, it is possible to suppress a decrease in shielding performance in the high frequency band due to the skin effect, and to prevent an increase in electrical resistance and disconnection due to dissimilar metal contact corrosion between surrounding electric wires having linear conductors containing different types of metal materials. , The deterioration of the shielding performance can be suppressed.

  As described above, in a shielded electric wire including a shield body, an appropriate shield body can be provided according to various required specifications such as weight reduction and shield performance.

  Moreover, in said 2nd aspect, a shield body has the structure where the several same shield strand wire each including the multiple types of surrounding electric wire twisted together was gathered together in the state surrounding the circumference | surroundings of the main electric wire. In this case, the core wires (metals) of a plurality of types of surrounding electric wires are uniformly distributed to the shield strands. As a result, the shield performance at each location of the shield body can be made more uniform, and a situation in which the shield performance is particularly deteriorated in a part of the shield body can be avoided.

  Moreover, in said 3rd aspect, each of multiple types of surrounding electric wire has insulation coating of a different color for every kind. In this case, it is possible to easily distinguish different types of surrounding electric wires. Thereby, it becomes possible to perform the operation | work which gathers an surrounding electric wire and makes a shield body, and a terminal processing operation | work more simply. Furthermore, when the shield body is discarded, it becomes easy to separate and dispose of the surrounding electric wires for each type of core wire (metal).

  Moreover, in said 4th aspect, the insulation coating of the surrounding electric wire has a several laminated | stacked coating layer. The outermost coating layer includes a synthetic resin having higher self-lubricating property than the synthetic resins included in the other coating layers. In this case, the frictional resistance between the surrounding electric wires can be reduced. Therefore, in the fourth aspect, it is easy to bend the shield body at the time of creating the shielded electric wire and wiring work, and when the shield body is temporarily bent and returned to the original shape, a plurality of the shield bodies are It is easy to return to the original state in which the types of surrounding wires are evenly distributed.

It is a schematic side perspective view of the shielded electric wire 11 according to the first embodiment. 2 is an enlarged perspective view of a part of a shield body 30 in a shielded electric wire 11. FIG. 3 is an enlarged side view of a part of a shield body 30 in a shielded electric wire 11. FIG. It is a partial expanded side view of the shield body 30X which concerns on the 1st modification applicable to the shield electric wire 11. FIG. It is a one part enlarged side view of shield body 30Y concerning the 2nd modification applicable to shield electric wire 11. It is a side perspective view of a shield strand which constitutes shield body 30Y. It is a schematic side perspective view of the shielded electric wire 12 according to the second embodiment. It is the side perspective view showing an example of the connection structure of the surrounding electric wire which constitutes shield body 40 of shield electric wire 12. It is the figure which showed the specific example of the arrangement | sequence of the surrounding electric wire in the shield body 40 of the shield electric wire 12. FIG. It is sectional drawing of the surrounding electric wire which concerns on the 1st application example applicable to the shielded electric wires 11 and 12. FIG. It is sectional drawing of the surrounding electric wire which concerns on the reference example applicable to the shielded electric wires 11 and 12. FIG. It is a one part enlarged perspective view of the shield body 30Z which concerns on the 2nd application example applicable to the shield electric wire 11. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<First Embodiment>
The configuration of the shielded electric wire 11 according to the first embodiment will be described with reference to FIGS. The shielded electric wire 11 is mounted on a vehicle such as an automobile.

  The shielded electric wire 11 includes a main electric wire 20 to be shielded and a shield body 30 that covers the main electric wire 20. The shield body 30 surrounds the main electric wire 20 and shields electromagnetic noise.

  FIG. 1 is a schematic side perspective view of the main part of the shielded electric wire 11. FIG. 2 is a partial cross section of the shield body 30 in the shielded electric wire 11 and an enlarged view of the vicinity thereof. FIG. 3 is an enlarged view of a part of the side surface of the shield body 30. FIG. 4 is an enlarged view of a shield body 30 </ b> X according to a first modification of the shield body 30.

<Main wire>
As shown in FIG. 1, the main electric wire 20 is covered with a shield body 30. In the example shown in FIG. 1, the shield body 30 covers the three main electric wires 20 at once. In addition, when the shield object of the shield body 30 is the one main electric wire 20, the case where it is the two main electric wires 20 or the case where it is the three or more main electric wires 20 is also considered.

  The main electric wire 20 is a covered electric wire having, for example, a conductor whose main component is copper or aluminum and an insulating coating covering the periphery of the conductor. The insulating coating is a synthetic resin member mainly composed of polyethylene, vinyl chloride, polyamide-based nylon or the like.

<Shield body>
The shield body 30 includes a plurality of types of peripheral electric wires 31 gathered together so as to surround the main electric wire 20. The present embodiment is an example in the case where the shield body 30 has a structure in which a plurality of types of surrounding electric wires 31 are knitted and formed into a cylindrical shape.

  The plurality of types of surrounding electric wires 31 have linear conductors containing different metal materials. All of the plurality of types of surrounding electric wires 31 or all of the remaining ones except for one type are insulated wires having a core wire 310 including a linear conductor and an insulating coating 311 covering the periphery of the core wire.

  This embodiment is an example in the case where all of the plurality of types of surrounding electric wires 31 are insulated electric wires.

  For example, the surrounding electric wire 31 may be an enameled wire. In this case, the insulating coating 311 is an insulating paint applied to the core wire 310. Examples of the insulating paint include urethane resin, polyester resin, and polyamide (PA) resin. It is also conceivable that the insulating coating 311 of the surrounding electric wire 31 is a thermoplastic resin coating formed by extrusion molding around the core wire 310.

  The core wire 310 of the plurality of types of the surrounding electric wires 31 includes a plurality of types of linear conductors including different metal materials. For example, the core wire 310 is a bundle of a plurality of linear conductors (element wires). It is also conceivable that the core wire 310 is a single wire composed of a single linear conductor. As the linear conductor included in the core wire 310, a magnetic material such as copper or iron or a metal material such as aluminum can be considered.

  For example, when the core wire 310 of the surrounding electric wire 31 includes a linear conductor containing copper, the surrounding electric wire 31 has an advantage that electric resistance and inductance are small.

  For example, when the core wire 310 of the surrounding electric wire 31 includes a linear conductor containing a magnetic material such as iron, the surrounding electric wire 31 is excellent in magnetic shielding performance.

  For example, when the core wire 310 of the surrounding electric wire 31 contains the linear conductor containing aluminum, this surrounding electric wire 31 has the advantage that it is lightweight.

  In the present embodiment, each of the plurality of types of surrounding electric wires 31 has an insulating coating 311 of a different color for each type. In other words, the surrounding electric wires 31 having the same color insulation coating 311 have linear conductors of the same kind of metal material.

  For example, in the example shown in FIGS. 1 to 3, the shield body 30 has a structure in which two types of surrounding electric wires 31 are gathered to surround the main electric wire 20.

  Hereinafter, as necessary, two types of peripheral electric wires 31 of different types are referred to as the peripheral electric wire 31A and the peripheral electric wire 31B, respectively. For convenience, in FIGS. 2 to 6 and 9, each of the surrounding electric wires 31 is hatched with a different pattern for each type.

  In the example shown in FIG. 3, the plurality of surrounding electric wires 31 are knitted in a state where electric wires of the same type are arranged in parallel and different electric wires intersect. In this case, many portions where the surrounding electric wire 31A and the surrounding electric wire 31B overlap can be provided.

  Further, as in the shield body 30X shown in FIG. 4, a plurality of surrounding electric wires 31 may be knitted in a state in which different types of electric wires are arranged in parallel and cross each other. In addition, there may be a case where the surrounding electric wires 31A and the surrounding electric wires 31B are knitted irregularly.

  Moreover, the ratio of the number of the surrounding electric wires 31A and the surrounding electric wires 31B in the shield body 30 may or may not be the same. The same applies to the shield body 30X. 3 and 4 show an example in which the number of the surrounding electric wires 31A and the number of the surrounding electric wires 31B are the same ratio.

  For example, when the shielded electric wire 11 that satisfies the recent demand for weight reduction of vehicles is demanded, the shield body 30 (30X) in the shielded electric wire 11 is a peripheral electric wire 31A having a core wire 310 containing aluminum and a core wire 310 containing copper. The above-mentioned request can be met by using the surrounding electric wire 31 </ b> B. In this case, the shielded wire 11 can be made lighter by increasing the ratio of the surrounding wires 31A included in the shield body 30 (30X). Of course, in any case, the shielding performance of the shielded electric wire 11 is within a range that satisfies the required specifications.

  In addition, for example, when the shielded electric wire 11 having excellent shielding performance in the high frequency band is required, the surrounding electric wire 31A having the core wire 310 containing a magnetic material such as iron is used as the shield body 30 (30X) in the shielded electric wire 11. And the surrounding electric wire 31B having the core wire 310 containing copper can meet the above requirement. In this case, if the shield body 30 (30X) having a high ratio of the surrounding electric wires 31A including the magnetic material is employed, the shielded electric wire 11 having more excellent magnetic shielding performance can be produced.

<Effect>
In the present embodiment, the combination of metal materials used for the linear conductors included in the core wire 310 improves the shielding performance of the shielded electric wire 11 or the high-frequency band, for example, with a specific weight for reducing the weight of the shield body 30 (30X). It is possible to arbitrarily make a shielded electric wire 11 having a specific gravity.

  Therefore, in the shielded electric wire 11 including the shield body 30 (30X), it is possible to provide an appropriate shield body 30 (30X) according to various required specifications such as weight reduction and shield performance.

  In the present embodiment, all of the plurality of types of surrounding electric wires 31 are insulated wires having a core wire 310 including a linear conductor and an insulating coating 311 covering the periphery of the core wire 310. In this case, it is possible to suppress a decrease in shielding performance in the high frequency band due to the skin effect, and to prevent an increase in electrical resistance and disconnection due to dissimilar metal contact corrosion between the surrounding electric wires 31 each having a linear conductor containing different types of metal materials. . Thereby, the fall of the shielding performance of a shielded electric wire can be suppressed.

  In the present embodiment, each of the plurality of types of surrounding electric wires 31 has an insulating coating 311 of a different color for each type. In this case, a plurality of different types of surrounding electric wires 31 can be easily distinguished. Thereby, the operation | work which gathers the surrounding electric wires 31 and makes the shield body 30 (30X) and the terminal processing operation | work can be performed more simply. Furthermore, when the shield body 30 (30X) is discarded, the surrounding electric wires 31 can be easily disposed of separately for each type of the core wire 310 (metal).

  Moreover, in this embodiment, when the insulation coating 311 of the surrounding electric wire 31 in the shielded electric wire 11 is a high heat resistant material, the heat resistance of the shield body 30 (30X) in the shielded electric wire 11 is improved.

  Moreover, in this embodiment, when the surrounding electric wire 31 is an enameled wire, the outer diameter of the surrounding electric wire 31 can be made small. Thereby, the shield body 30 (30X) can be made more compact.

<First embodiment: application example of shield body>
Next, an application example of the shield body 30Y applicable to the shielded electric wire 11 will be described with reference to FIGS. FIG. 5 is an enlarged side view of a part of the shield body 30Y.

  The shield body 30 </ b> Y is different from the shield body 30 (30 </ b> X) in that it has a shield strand 32. Hereinafter, the difference between the shield body 30Y and the shield body 30 (30X) will be described.

  The shield body 30Y includes the same shield stranded wire 32 that includes a plurality of types of surrounding electric wires 31 twisted together. The shield body 30 </ b> Y has a structure in which shield strands 32 are gathered so as to surround the main electric wire 20.

  The example shown in FIG. 5 is an example in the case where the shield body 30Y has a structure in which a plurality of shield strands 32 are knitted into a cylindrical shape. FIG. 6 is a side perspective view of the shield strand 32 alone.

  In the example shown in FIG. 5, the shield body 30Y has two types of surrounding electric wires 31A and surrounding electric wires 31B. That is, in the example shown in FIG. 5, the shield body 30 </ b> Y has a structure in which the shield stranded wire 32 in which the surrounding electric wire 31 </ b> A and the surrounding electric wire 31 </ b> B are twisted is gathered so as to surround the main electric wire 20.

  In the shielded electric wire 11 to which the shield body 30 </ b> Y is applied, the core wire 310 (metal) of the plurality of types of the surrounding electric wires 31 is uniformly distributed to the shield twisted wires 32. Furthermore, even if the shield body 30Y is deformed, the uniform distribution state of the plurality of types of core wires 310 is unlikely to collapse.

  Therefore, the shield performance for each location of the shield body 30Y can be made more uniform, and it is possible to avoid a situation in which the shield performance is particularly deteriorated in a part of the shield body 30Y.

Second Embodiment
Next, the shielded electric wire 12 according to the second embodiment will be described with reference to FIGS.

  The shielded electric wire 12 has a shield body 40 having a structure in which the surrounding electric wires 31 are arranged differently from the shield body 30 in the shielded electric wire 11. Hereinafter, the difference between the shielded electric wire 12 and the shielded electric wire 11 will be described.

  FIG. 7 is a side perspective view of the shielded electric wire 12. In the present embodiment, the shielded electric wire 12 includes a cylindrical shield body 40 that has a plurality of types of peripheral electric wires 31 that are arranged along the longitudinal direction of the main electric wire 20 and arranged around the main electric wire 20. Therefore, in the shield body 40, the plurality of surrounding electric wires 31 are arranged in parallel without intersecting.

  In the example shown in FIGS. 7 to 9, the shield body 40 includes two types of surrounding electric wires 31. In the example shown in FIG. 9, different types of surrounding electric wires 31 are distinguished from the surrounding electric wires 31A and the surrounding electric wires 31B.

  In the shield body 40, it is conceivable that the plurality of surrounding electric wires 31 are connected together in a state of being arranged in parallel before being formed into a cylindrical shape surrounding the main electric wire 20. FIG. 8 is a side perspective view showing an example of a connection structure of surrounding electric wires constituting the shield body 40.

  In the example shown in FIG. 8, the insulating coating 311 of each of the surrounding electric wires 31 is a thermoplastic resin coating formed by extrusion molding around the core wire 310. Further, the insulation coatings 311 of the adjacent peripheral wires 31 are partially bonded to each other at both ends of the plurality of peripheral wires 31 arranged in parallel.

  In the example shown in FIG. 8, spot-like adhesive portions 90 are formed at portions that contact each other at the end portions of the insulating coating 311 of the adjacent surrounding electric wires 31. The adhesion part 90 is a welding part between the insulating coatings 311 of, for example, a thermoplastic resin. It is also conceivable that the bonding portion 90 is a portion where the insulating coatings 311 are bonded together with an adhesive. Thereby, the shield body 40 in which the plurality of surrounding electric wires 31 are integrated in a sheet shape is obtained.

  Thereafter, the sheet-like shield body 40 is wound into a cylindrical shape so as to surround the main electric wire 20. As a result, a cylindrical shield body 40 is obtained. The cylindrical shield body 40 has a structure in which two types of surrounding electric wires 31 are gathered so as to surround the main electric wire 20.

  FIGS. 9A to 9C are diagrams illustrating some specific examples of the arrangement of the surrounding electric wires 31 in the shield body 40 of the shielded electric wires 12.

  In the example shown in FIG. 9A, the shield body 40 has a form in which the surrounding electric wires 31A and 31B are alternately arranged one by one.

  In the example shown in FIG. 9B, the shield body 40 is alternately composed of a surrounding wire group 3A including a plurality of surrounding wires 31A arranged in parallel and a surrounding wire group 3B including a plurality of surrounding wires 31B arranged in parallel. It has the form which lined up. The example shown in FIG. 9B is an example in which the surrounding wire group 3A includes two surrounding wires 31A and the surrounding wire group 3B includes two surrounding wires 31B. In addition, the case where the number of surrounding electric wires 31A contained in the surrounding electric wire group 3A differs from the number of surrounding electric wires 31B contained in the surrounding electric wire group 3B is also considered.

  In the example shown in FIG. 9C, the shield body 40 has a configuration in which shield strands 32 in which the surrounding electric wires 31A and the surrounding electric wires 31B are twisted are arranged in parallel.

  Also in the present embodiment, as in the first embodiment, in the shielded electric wire 12 including the shield body 40, it is possible to provide an appropriate shield body 40 according to various required specifications such as weight reduction and shield performance. .

  Further, in the example shown in FIG. 9C, the shield performance for each location of the shield body 40 can be made more uniform, and the situation where the shield performance is particularly deteriorated in a part of the shield body 40 is avoided. Things will be possible.

<First application example>
Next, the surrounding electric wire 61 applicable to the shielded electric wire 11 in 1st Embodiment and the shielded electric wire 12 in 2nd Embodiment is demonstrated, referring FIG. FIG. 10 is a cross-sectional view of the surrounding electric wire 61. In FIG. 10, the same components as those shown in FIGS. 1 to 9 are given the same reference numerals.

  In this example, the insulation coating 610 of the surrounding electric wire 61 has a plurality of laminated coating layers. The example shown in FIG. 10 is an example in the case of having two coating layers in which the insulation coating 610 of the surrounding electric wires 61 is laminated.

  As shown in FIG. 10, the insulating coating 610 of the surrounding electric wire 61 has a first coating 611 formed inside and a second coating 612 formed outside the first coating 611. The second coating 612 includes a synthetic resin having higher self-lubricating property than the first coating 611.

  The first coating 611 and the second coating 612 may be a coating made of an insulating paint such as urethane resin, polyester resin or polyamide (PA) resin, or a thermoplastic resin formed by extrusion molding. In general, as a synthetic resin having a high self-lubricating property, a polyamide (PA) resin or a polyamideimide (PAI) resin can be considered. For example, in the example shown in FIG. 10, the first coating 611 in the insulating coating 610 of the surrounding electric wire 61 may be a urethane resin, and the second coating 612 may be a polyamide (PA) resin.

  When the surrounding wire 61 is applied to the shielded wire 11 or 12, since the second coating 612 having high self-lubricity forms the outermost layer of the surrounding wire 61, the frictional resistance due to the contact between the surrounding wires 61 is increased. Reduce.

  Therefore, in the shielded electric wire 11 to which the peripheral electric wire 61 is applied, the frictional resistance between the peripheral electric wires 61 can be reduced. In this case, it is easy to bend the shield bodies 30 and 40 when creating the shielded electric wire 11 and during wiring work, and when the shield bodies 30 and 40 are temporarily bent and returned to the original shape, the shield body 30 , 40, it is easy to return to the original state in which the plurality of types of surrounding electric wires 61 are uniformly distributed.

  In addition, the case where the insulation coating 610 of the surrounding electric wire 61 has three or more coating layers is also considered. In this case, the outermost layer of the insulating coating 610 includes a synthetic resin such as a polyamide (PA) resin having high self-lubricity.

<Reference example>
Next, a peripheral electric wire 71 according to a reference example applicable to the shielded electric wire 11 in the first embodiment and the shielded electric wire 12 in the second embodiment will be described with reference to FIG. FIG. 11 is a cross-sectional view of the surrounding electric wire 71. In FIG. 11, the same components as those shown in FIGS. 1 to 10 are given the same reference numerals.

  In the example shown in FIG. 11, the surrounding electric wire 71 has a plurality of core wires 310 and an insulating coating 711. The linear conductors included in the plurality of core wires 310 include linear conductors that include different metal materials.

  The example shown in FIG. 11 is an example in which the surrounding electric wire 71 has two types of core wires 310. Hereinafter, two different types of core wires 310 are referred to as core wires 310P and 310Q, respectively. In addition, the case where the surrounding electric wire 71 has the core wire 310 containing 3 or more types of different metal materials is also considered.

  The insulating coating 711 collectively covers the periphery of the plurality of core wires 310. As in the first embodiment, the insulating coating 711 may be a coating of an insulating paint such as urethane resin, polyester resin, or polyamide (PA) resin, or a thermoplastic resin formed by extrusion molding.

  Unlike the shielded electric wire 11 according to the first embodiment in which the shield body 30 (30X) is configured by a plurality of types of peripheral electric wires 31, the shielded electric wire 11 to which the peripheral electric wire 71 according to the present reference example is applied has a shield body. 30 (30X) has a structure in which one type of surrounding electric wire 71 is gathered to surround the main electric wire 20.

  Even when the surrounding electric wire 71 according to this reference example is applied to the shielded electric wire 11, the shielding performance for each place of the shield body 30 (30X) can be made uniform, and in a part of the shield body 30 (30X) It is possible to avoid a situation where the shield performance is particularly deteriorated. The same applies to the shielded electric wire 12 according to the second embodiment.

<Second application example>
Next, a shield body 30Z according to a second application example applicable to the shielded electric wire 11 in the first embodiment will be described with reference to FIG. FIG. 12 is an enlarged view of a part of the cross section of the shield body 30Z knitted in a cylindrical shape and the vicinity thereof. In FIG. 12, the same components as those shown in FIGS. 1 to 11 are given the same reference numerals.

  The shield body 30Z includes a peripheral electric wire 31 that is one type of bare electric wire and a peripheral electric wire 31 that is one type or a plurality of types of insulated wires. That is, the shield body 30Z is composed of one type of bare wire and one type or a plurality of types of insulated wires.

  The example illustrated in FIG. 12 is an example in which the shield body 30Z includes a surrounding wire 31 that is one type of bare wire and a surrounding wire 31 that is one type of insulated wire. Hereinafter, the peripheral electric wire 31 that is a bare electric wire is referred to as a peripheral electric wire 31C, and the peripheral electric wire 31 that is an insulated wire is referred to as a peripheral electric wire 31A. For convenience, in FIG. 12, the surrounding electric wires 31A and the surrounding electric wires 31C are hatched with different patterns for each type.

  As shown in FIG. 12, the surrounding electric wire 31 </ b> C has only a core wire 310 including a linear conductor made of a metal material.

  The core wire 310 included in the surrounding electric wire 31C and the core wire 310 included in the surrounding electric wire 31A include linear conductors of different metal materials. For example, the case where the core wire 310 of the surrounding electric wire 31C includes a linear conductor containing copper and the core wire 310 in the surrounding electric wire 31A includes a linear conductor containing aluminum is considered.

  Also in the shielded electric wire 11 to which the shield body 30Z is applied, the same effect as the first embodiment can be obtained. In shield body 30Z, dissimilar metal contact corrosion between core wire 310 in surrounding electric wire 31C and core wire 310 in surrounding electric wire 31A is prevented by insulating coating 311 of surrounding electric wire 31A. That is, while suppressing the reduction | decrease in the shielding performance of the high frequency band by a skin effect, the increase in the electrical resistance by the dissimilar-metal contact corrosion between the surrounding electric wire 31A and the surrounding electric wire 31C which has a linear conductor each containing a different kind of metal material And disconnection can be prevented. Thereby, the fall of shielding performance can be suppressed.

  In the example shown in FIG. 12, the surrounding electric wires 31A and the surrounding electric wires 31C of the shield body 30Z are knitted in a state where the same type of electric wires are arranged in parallel and different types of electric wires intersect. However, as in the shield body 30X shown in FIG. 4, there may be a case where the surrounding electric wires 31A and the surrounding electric wires 31C are knitted in a state in which different types of electric wires are arranged in parallel and cross each other. In addition, there may be a case where the surrounding electric wires 31A and the surrounding electric wires 31C are knitted irregularly.

  Further, the shield body 30Z may have a configuration in which a plurality of surrounding electric wires 31A and a plurality of surrounding electric wires 31C are arranged in parallel and in a cylindrical shape like the shielding body 40 shown in the second embodiment. .

<Other application examples>
There may be a case where the core wire 310 of the surrounding electric wire 31 constituting the shield body 30 is formed of linear conductors of different types of metal materials. In this case, the shield performance for each location of the shield body 30 can be made uniform, and a situation in which the shield performance is particularly deteriorated in a part of the shield body 30 can be avoided. The same applies to the shield body 30X and the shield body 40.

  Moreover, the case where the shield strand 32 contains the 3 or more types of surrounding electric wire 31 is also considered. Moreover, the case where the shield strand 32 contains the surrounding electric wire 31A and the surrounding electric wire 31C is also considered.

  Moreover, the case where the shield body 30 contains a nonmetallic wire other than the surrounding electric wire 31 is also considered. In this case, it is possible to improve the strength of the shield body 30 while suppressing an increase in the weight of the entire shield body 30. The same applies to the shield body 30X and the shield body 40. For example, the non-metallic wire may be cotton yarn or aromatic polyamide (PA) fiber.

  In addition, when the insulation coating 311 of the surrounding wires 31 in the shielded wires 11 and 12 is a synthetic resin having high self-lubricating properties such as polyamide (PA) resin or polyamideimide (PAI) resin, the friction resistance between the surrounding wires 31 is Can be reduced. Thereby, it is easy to bend the shield body 30 (30X) at the time of creation of the shielded electric wire 11 and at the time of wiring work, and further, when the shield body 30 (30X) is temporarily bent and returned to the original shape, It is easy to return to the original state in which a plurality of types of surrounding electric wires 31 in the shield body 30 (30X) are uniformly distributed.

  The shielded electric wire according to the present invention can be freely combined within the scope of the invention described in each claim, each embodiment described above, application examples of each embodiment, and other application examples. The embodiments, application examples of each embodiment, and other application examples may be appropriately modified or omitted in part.

DESCRIPTION OF SYMBOLS 11 Shield electric wire 12 Shield electric wire 20 Main electric wire 30 Shield body 30X Shield body 30Y Shield body 30Z Shield body 31 Ambient wire 310 Core wire 310P Core wire 310Q Core wire 311 Insulation coating 31A Ambient wire 31B Ambient wire 31C Ambient wire 32 Shield strand 3A 3B Ambient wire group 40 Shield body 61 Ambient wire 610 Insulation coating 611 First coating 612 Second coating 71 Ambient wire 711 Insulation coating 90 Adhesive part

Claims (4)

The main wire to be shielded,
A shield body including a plurality of types of surrounding electric wires, each having a linear conductor containing a different metal material and gathered around the main electric wire,
A shielded electric wire, which is an insulated wire having a plurality of types of the surrounding electric wires or all of the remaining ones except for one type having a core wire including the linear conductor and an insulating coating covering the periphery of the core wire. The shielded electric wire according to claim 1,
The shield body is a shielded electric wire having a structure in which a plurality of identical shield stranded wires each including a plurality of types of the surrounding electric wires twisted together are gathered around the main electric wire. The shielded electric wire according to any one of claims 1 and 2,
Each of the plurality of types of the surrounding electric wires is a shielded electric wire having the insulation coating of a different color for each type. The shielded electric wire according to any one of claims 1 to 3,
The insulating coating of the surrounding electric wire has a plurality of laminated coating layers,
The shielded electric wire, wherein the outermost coating layer includes a synthetic resin having higher self-lubricating property than the synthetic resins included in the other coating layers.

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