WO2021171961A1 - Sheet-shaped electrical conduction path - Google Patents

Sheet-shaped electrical conduction path Download PDF

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Publication number
WO2021171961A1
WO2021171961A1 PCT/JP2021/004294 JP2021004294W WO2021171961A1 WO 2021171961 A1 WO2021171961 A1 WO 2021171961A1 JP 2021004294 W JP2021004294 W JP 2021004294W WO 2021171961 A1 WO2021171961 A1 WO 2021171961A1
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WO
WIPO (PCT)
Prior art keywords
noise shielding
transmission line
sheet
shielding member
comparative example
Prior art date
Application number
PCT/JP2021/004294
Other languages
French (fr)
Japanese (ja)
Inventor
博之 兒玉
加藤　清
優也 岩口
修平 大図
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2021171961A1 publication Critical patent/WO2021171961A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/30—Installations of cables or lines on walls, floors or ceilings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • This disclosure relates to a sheet-shaped conductive path.
  • Patent Document 1 discloses an electric wire assembly in which a flat cable in which a plurality of electric wires are arranged and a noise shielding sheet are superposed.
  • the noise shielding sheet suppresses the influence of electromagnetic noise on electric wires.
  • the sheet-shaped conductive path of the present disclosure has been completed based on the above circumstances, and an object of the present disclosure is to reduce costs.
  • the sheet-shaped conductive path of the present disclosure is Flexible sheet material and A plurality of transmission lines arranged side by side on the sheet material and A noise shielding member provided on the sheet material is provided, and the sheet material is provided with a noise shielding member.
  • the plurality of transmission lines include a first transmission line that requires noise shielding and a second transmission line that does not require noise shielding.
  • the noise shielding member is arranged so as to be along only the first transmission line among the plurality of transmission lines.
  • the cost can be reduced.
  • FIG. 1 is a plan view of the sheet-shaped conductive path of the first embodiment.
  • FIG. 2 is an exploded perspective view of the sheet-shaped conductive path.
  • FIG. 3 is a cross-sectional view of the sheet-shaped conductive path.
  • FIG. 4 is a schematic side view of the double-shielded conductive path whose shield performance is to be measured.
  • FIG. 5 is a schematic side view of a first comparative example, which is a measurement target of the shield performance.
  • FIG. 6 is a schematic side view of a second comparative example, which is a measurement target of the shield performance.
  • FIG. 7 is a schematic side view of a third comparative example, which is a measurement target of the shield performance.
  • FIG. 1 is a plan view of the sheet-shaped conductive path of the first embodiment.
  • FIG. 2 is an exploded perspective view of the sheet-shaped conductive path.
  • FIG. 3 is a cross-sectional view of the sheet-shaped conductive path.
  • FIG. 4
  • FIG. 8 is a schematic side view of a sixth comparative example, which is a measurement target of the shield performance.
  • FIG. 9 is a schematic side view of a seventh comparative example, which is a measurement target of the shield performance.
  • FIG. 10 is a graph showing the shield performance of the double-shielded conductive path, the single-shielded conductive path, and the first comparative example.
  • FIG. 11 is a graph showing the shield performance of the single-shielded conductive path, the second comparative example, and the third comparative example.
  • FIG. 12 is a graph showing the shield performance of the single-shielded conductive path, the fourth comparative example, and the fifth comparative example.
  • FIG. 13 is a graph showing the shield performance of the single shield conductive path, the sixth comparative example and the seventh comparative example.
  • FIG. 14 is a graph showing the shield performance of the single-shielded conductive path, the eighth comparative example and the ninth comparative example.
  • FIG. 15 is a graph showing the shield performance of the single-shielded conductive path, the tenth comparative example and the eleventh comparative example.
  • FIG. 16 is a graph showing the shield performance of the single-shielded conductive path, the twelfth comparative example and the thirteenth comparative example.
  • FIG. 17 is a schematic side view of the 14th Comparative Example, the 15th Comparative Example, and the 16th Comparative Example.
  • FIG. 18 is a graph showing the shield performance of the single-shielded conductive path, the 14th comparative example, the 15th comparative example, and the 16th comparative example.
  • the sheet-shaped conductive path of the present disclosure is (1) A flexible sheet material, a plurality of transmission lines arranged side by side on the sheet material, and a noise shielding member provided on the sheet material are provided, and the plurality of transmission lines are noise shielding.
  • the noise shielding member is arranged along only the first transmission line among the plurality of transmission lines, including a first transmission line that requires noise shielding and a second transmission line that does not require noise shielding. According to the configuration of the present disclosure, since the noise shielding member is arranged only along the first transmission line that requires noise countermeasures among the plurality of transmission lines, the material cost of the noise shielding member can be reduced. ..
  • the noise shielding member preferably has a sheet shape containing a magnetic material. According to this configuration, the electromagnetic noise generated from the first transmission line is absorbed by the magnetic loss of the magnetic material, and a high noise shielding effect can be obtained.
  • the pair of noise shielding members are arranged so as to face each other with the first transmission line interposed therebetween. According to this configuration, a higher noise shielding effect can be obtained as compared with the case where noise countermeasures for transmission lines are taken with only one noise shielding member.
  • the noise shielding member is arranged along only a part of the total length of the first transmission line. According to this configuration, the material cost of the noise shielding member can be reduced without reducing the noise shielding effect.
  • the length dimension of the noise shielding member in the wiring direction of the first transmission line is preferably 500 mm or more. According to this configuration, a higher noise shielding effect can be obtained as compared with the case where the length of the noise shielding member is less than 500 mm.
  • an electric circuit is connected to the end of the first transmission line, and the noise shielding member is the end of the first transmission line. It is preferably arranged only in the vicinity area. According to this configuration, the electromagnetic noise generated in the electric circuit is reflected toward the electric circuit side at the end of the first transmission line. Therefore, as compared with the case where the noise shielding member is arranged at the central portion in the length direction of the first transmission line, the influence of the electromagnetic noise generated in the electric circuit is less likely to reach the first transmission line.
  • the noise shielding member has a sheet shape, and the thickness dimension of the noise shielding member is preferably 200 ⁇ m to 400 ⁇ m. According to this configuration, a high noise shielding effect can be obtained.
  • the noise shielding member is in the form of a sheet having a constant width, and the width dimension of the noise shielding member is preferably 15 mm or more. According to this configuration, a high noise shielding effect can be obtained.
  • Example 1 embodying the sheet-shaped conductive path A of the present disclosure will be described with reference to FIGS. 1 to 18. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. In the first embodiment, with respect to the vertical direction, the directions appearing in FIGS. 2 and 3 are defined as upward and downward as they are.
  • the sheet-shaped conductive path A of the first embodiment includes a pair of sheet materials 10, a first transmission line 20, a plurality of second transmission lines 30, a plurality of pairs of noise shielding members 40, and a plurality of sheets. It is configured to include a connector 45.
  • the sheet-shaped conductive path A is attached to a vehicle body (not shown). Targets for attaching the sheet-shaped conductive path A in the body include a roof, a door panel, and the like.
  • the sheet-shaped conductive path A is connected between, for example, an external antenna (not shown) attached to the roof and an ECU (electronic control unit).
  • the pair of sheet materials 10 are made of a synthetic resin material having flexibility and electrical insulation.
  • a resin material such as PVC (polyvinyl chloride) is used.
  • the sheet material 10 has one trunk line wiring portion 11 and a branch line wiring portion 12 protruding from the side edge portion of the trunk line wiring portion 11 in a branched shape. In the following description, it is assumed that the sheet material 10 is arranged horizontally for convenience.
  • the first transmission line 20 and the second transmission line 30 are horizontally arranged so as to be sandwiched from above and below.
  • the first transmission line 20 has a trunk line portion 21 arranged along the trunk line wiring portion 11 and a branch line portion 22 arranged along the branch line wiring portion 12.
  • the second transmission line 30 also has a trunk line portion (not shown) arranged along the trunk line wiring portion 11 and a branch line portion arranged along the branch line wiring portion 12 (not shown). Omitted) and.
  • the first transmission line 20 is a conductive line of a communication circuit, it is composed of a coaxial cable.
  • the coaxial cable includes a conductor 24, a cylindrical insulator 25 surrounding the conductor 24, a shield layer 26 composed of a braided wire or the like surrounding the outer circumference of the insulator 25, and a shield layer 26. It has a cylindrical sheath 27 that surrounds it.
  • the sheath 27 is made of PVC (polyvinyl chloride).
  • the first transmission line 20 transmits, for example, a signal received by an external antenna (not shown) attached to the roof to the ECU at a high speed of 1 Gbps or more.
  • a high frequency current of 1 GHz or more flows through the first transmission line 20.
  • High-frequency current causes common mode noise and the like. Therefore, regarding the first transmission line 20, a coaxial cable is used as a countermeasure against electromagnetic noise, and a noise shielding member 40 is provided in order to further improve the reliability of the noise countermeasure.
  • the second transmission line 30 surrounds the outer circumference of the core wire 31 with a cylindrical insulating coating 32.
  • the insulating coating 32 is made of PVC (polyvinyl chloride) like the sheath 27 of the first transmission line 20.
  • the second transmission line 30 is used as a conductive line for power supply and the like. No measures against electromagnetic noise are required for the second transmission line 30.
  • the trunk line portion 21 of the first transmission line 20 and the trunk line portion (not shown) of the second transmission line 30 are arranged so as to be arranged in parallel with each other.
  • the branch line portion 22 of the first transmission line 20 and the branch line portion (not shown) of the second transmission line 30 are arranged so as to be arranged in parallel with each other, or the first transmission line 20 Either a form in which only the branch line portion 22 is laid out or a form in which only the branch line portion (not shown) of the second transmission line 30 is laid out is adopted.
  • the noise shielding member 40 has flexibility and forms an elongated sheet shape.
  • the width dimension of the noise shielding member 40 is larger than the diameter dimension of the first transmission line 20.
  • the noise shielding member 40 has a three-layer structure in which a thin-film magnetic layer 41, a thin-film welding layer 42, and a thin-film protective layer 43 are laminated in this order.
  • the magnetic material layer 41 is obtained by dispersing and mixing powder made of a soft magnetic material such as ferrite, electromagnetic pure iron, and silicon iron in a synthetic resin.
  • the magnetic material layer 41 converts high-frequency electromagnetic noise into heat and eliminates it due to magnetic loss.
  • the magnetic material layer 41 is sandwiched between the welding layer 42 and the protective layer 43. In FIG.
  • the thicknesses of the magnetic layer 41, the welding layer, and the protective layer 43 are exaggerated.
  • the welding layer 42 is made of PVC (polyvinyl chloride) like the sheath 27 of the first transmission line 20 and the insulating coating 32 of the second transmission line 30.
  • the protective layer 43 is made of PET (polyethylene terephthalate).
  • the noise shielding member 40 has a shape extending in an elongated strip shape along the trunk line portion 21 and the branch line portion 22 of the first transmission line 20.
  • the noise shielding member 40 is arranged only in the vicinity region of both ends of the trunk line portion 21 and the vicinity region of the extension end portion of the branch line portion 22 in the first transmission line 20.
  • the noise shielding member 40 is not arranged in the region other than these.
  • An electric circuit 46 such as an antenna or an ECU is connected to the connector 45 provided at the end of the first transmission line 20.
  • the noise shielding member 40 is arranged in the vicinity of these electric circuits 46.
  • the first transmission line 20 and the second transmission line 30 are arranged on a horizontal jig (not shown) so as to be along a predetermined wiring path, and the first transmission line 20 and the second transmission line 30 are arranged on the horizontal jig (not shown).
  • One sheet material 10 is placed on the sheet material 10, and a plurality of noise shielding members 40 are placed on the sheet material 10 so as to be overlapped with each other.
  • the noise shielding member 40 is arranged along only both ends of the trunk line portion 21 and only the extending ends of the branch line portion 22 in the wiring path of the first transmission line 20.
  • the noise shielding member 40 is arranged so as to cover only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20.
  • ultrasonic welding is performed.
  • the sheet material 10 and the sheath 27 of the first transmission line 20 are welded, the insulating coating 32 of the second transmission line 30 is welded to the sheet material 10, and the welding layer of the noise shielding member 40 is welded. 42 and the sheet material 10 are welded together.
  • the first transmission line 20, the second transmission line 30, one sheet material 10, and one noise shielding member 40 integrated as described above are turned upside down. Then, the other sheet material 10 is placed on the first transmission line 20 and the second transmission line 30, and the noise shielding member 40 is placed on the sheet material 10 so as to be overlapped with each other. Also at this time, the noise shielding member 40 is arranged so as to be along only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20. In other words, the noise shielding member 40 is arranged so as to cover only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20.
  • the measurement targets are the first comparative example to the 16th comparative example in which the arrangement and dimensions of the double-shielded conductive path W, the single-shielded conductive path S, and the noise shielding member 40 are different.
  • the double-shielded conductive path W is provided with a noise shielding member 40 having a magnetic material layer 41 having the same dimensions as the magnetic material layer 41 of the first embodiment in a first transmission line 20 made of the same coaxial cable as in the first embodiment. Is.
  • the single-shielded conductive path S performs noise shielding only by the shield layer 26 of the coaxial cable of the first embodiment without providing the noise shielding member 40.
  • FIG. 4 is a schematic side view of the double-shielded conductive path W.
  • a pair of noise-shielding members 40 are provided so as to sandwich the first transmission path 20.
  • double-sided arrangement the arrangement form in which the pair of noise shielding members 40 sandwich the first transmission line 20.
  • the pair of noise shielding members 40 are arranged at both ends of the first transmission line 20.
  • both ends arrangement the form in which the noise shielding member 40 is arranged at both ends of the first transmission line 20 is referred to as “both ends arrangement”.
  • the length dimension of the magnetic material layer 41 in the wiring direction of the first transmission line 20 is 500 mm.
  • the thickness dimension of the magnetic material layer 41 is 200 ⁇ m.
  • the width dimension of the magnetic material layer 41 is 15 mm.
  • FIG. 5 is a schematic side view of the first comparative example C1.
  • the noise shielding member 40 arranged on both sides is arranged at the central portion in the length direction of the first transmission line 20.
  • center arrangement the form in which the noise shielding member 40 is arranged in the central portion in the length direction.
  • the dimension of the magnetic material layer 41 of the noise shielding member 40 is the same as the dimension of the double shield conductive path W.
  • FIG. 10 is a graph showing the shielding performance of the double-shielded conductive path W, the shielding performance of the single-shielded conductive path S, and the shielding performance of the first comparative example C1. From the graph of FIG. 10, the shielding performance of the double-shielded conductive path W is superior to the shielding performance of the single-shielded conductive path S. On the other hand, the shielding performance of the first comparative example C1 is generally the same level as that of the single-shielded conductive path S. Therefore, the shielding performance of both ends arrangement is superior to the shielding performance of the central arrangement.
  • FIG. 6 is a schematic side view of the second comparative example C2.
  • both ends are arranged, but at each end, only one noise shielding member 40 is arranged along the first transmission line 20.
  • a form in which only one noise shielding member 40 is arranged along the first transmission line 20 is referred to as “single-sided arrangement”.
  • the noise shielding member 40 covers only one side of the first transmission line 20.
  • FIG. 7 is a schematic side view of Third Comparative Example C3. In the third comparative example C3, the noise shielding member 40 arranged on one side is arranged in the center.
  • the graph of FIG. 11 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the second comparative example C2, and the shielding performance of the third comparative example C3.
  • the shielding performance of the second comparative example C2 arranged at both ends is generally at the same level as the shielding performance of the single-shielded conductive path S.
  • the shield performance of the third comparative example C3 arranged in the center is lower than the shield performance of the single shield conductive path S and the shield performance of the second comparative example C2. From the graph shown in FIG. 11, it can be seen that the shielding performance at both ends is superior to the shielding performance at the center.
  • the graph of FIG. 12 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the fourth comparative example C4, and the shielding performance of the fifth comparative example C5.
  • the fourth comparative example C4 has the same double-sided arrangement and both ends arrangement as the double-shielded conductive path W, but the length of the magnetic material layer 41 is 250 mm.
  • the length of the magnetic material layer 41 is changed to 250 mm as in the fourth comparative example C4 in the first comparative example C1 arranged on both sides and in the center.
  • the shielding performance of the fourth comparative example C4 arranged at both ends is superior to the shielding performance of the single-shielded conductive path S in the high frequency band of 2.5 GHz to 3.0 GHz.
  • the shield performance of the fifth comparative example C5 arranged in the center is generally the same level as the shield performance of the single shield conductive path S. From the graph of FIG. 12, it can be seen that if the length of the magnetic material layer 41 is shortened to about 250 mm, there is no significant difference in the shielding performance between the both end arrangement and the center arrangement.
  • FIG. 8 is a schematic side view of the sixth comparative example C6.
  • the noise shielding member 40 arranged on both sides is provided only at the end of the first transmission line 20 on the side close to the electric circuit 46 which is the noise source.
  • a form in which the noise shielding member 40 is arranged only at one end of both ends of the first transmission line 20 is referred to as “single end arrangement”.
  • FIG. 9 is a schematic side view of the seventh comparative example C7.
  • the seventh comparative example C7 is also arranged on both sides and at one end like the sixth comparative example C6, but in the seventh comparative example C7, contrary to the sixth comparative example C6, of both ends of the first transmission line 20.
  • the noise shielding member 40 is provided only at the end on the side far from the electric circuit 46 that is the source of noise.
  • the length of the magnetic layer 41 is 500 mm.
  • the graph of FIG. 13 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the sixth comparative example C6, and the shielding performance of the seventh comparative example C7. According to this graph, it can be seen that the shielding performance is superior when the noise shielding member 40 is arranged on the side closer to the noise generation source than when the noise shielding member 40 is arranged on the side far from the noise generation source.
  • the graph of FIG. 14 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the eighth comparative example C8, and the shielding performance of the ninth comparative example C9.
  • Both the eighth comparative example C8 and the ninth comparative example C9 are arranged on both sides and on one end.
  • the difference between the 8th Comparative Example C8 and the 9th Comparative Example C9 is that the length of the magnetic material layer 41 of the 8th Comparative Example C8 is 500 mm, whereas the length of the magnetic material layer 41 of the 9th Comparative Example C9 is It is 250 mm. From the graph of FIG. 14, it can be seen that the longer the magnetic material layer 41 is, the better the shielding performance is.
  • the graph of FIG. 15 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the tenth comparative example C10, and the shielding performance of the eleventh comparative example C11.
  • Both the tenth comparative example C10 and the eleventh comparative example C11 are arranged on both sides and arranged on both ends.
  • the length of the magnetic material layer 41 at each end of the first transmission line 20 is 750 mm, and the total length of both ends is 1500 mm.
  • the length of the magnetic material layer 41 at each end of the first transmission line 20 is 250 mm, and the length of 500 mm is secured when both ends are combined. According to the graph of FIG.
  • the graph of FIG. 16 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the twelfth comparative example C12, and the shielding performance of the thirteenth comparative example C13.
  • Both the twelfth comparative example C12 and the thirteenth comparative example C13 are arranged on both sides and both ends.
  • the length of the magnetic material layer 41 at each end of the first transmission line 20 is 250 mm, and a total length of 500 mm is secured when both ends are combined.
  • the thickness of each magnetic material layer 41 is 200 ⁇ m
  • the thirteenth comparative example C13 the thickness of each magnetic material layer 41 is 100 ⁇ m. According to the graph of FIG. 16, it can be seen that the twelfth comparative example C12 having the thick magnetic material layer 41 is superior in the shielding performance to the thirteenth comparative example C13 having the thin magnetic material layer 41.
  • FIG. 17 is a cross-sectional view of the 14th Comparative Example C14, the 15th Comparative Example C15, and the 16th Comparative Example C16.
  • the 14th Comparative Example C14, the 15th Comparative Example C15, and the 16th Comparative Example C16 are all arranged on both sides and both ends.
  • the length of the magnetic material layer 41 at each end is 250 mm for all Comparative Examples C14, C15, and C16.
  • the thickness of each magnetic layer 41 is 200 ⁇ m in each of Comparative Examples C14, C15, and C16.
  • the 14th Comparative Example C14 is 15.0 mm
  • the 15th Comparative Example C15 is 10.0 mm
  • the 16th Comparative Example C16 is 7.5 mm.
  • the graph of FIG. 18 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the 14th Comparative Example C14, the shielding performance of the 15th Comparative Example C15, and the shielding performance of the 16th Comparative Example C16.
  • the shielding performance of the 15th Comparative Example C15 in which the width of the magnetic material layer 41 is 10.0 mm and the 16th Comparative Example C16 in which the width of the magnetic material layer 41 is 7.5 mm is single shield conductive. It is generally the same level as the shield performance of the road S.
  • the shielding performance of the 14th Comparative Example C14 in which the width of the magnetic layer 41 is 15.0 mm is superior to the shielding performance of the single shield conductive path S, the 15th Comparative Example C15 and the 16th Comparative Example C16. You can see that there is.
  • the sheet-shaped conductive path A of the first embodiment has a flexible sheet material 10, a plurality of transmission lines 20 and 30 arranged side by side on the sheet material 10, and a noise shielding member provided on the sheet material 10. 40 and.
  • the plurality of transmission lines 20 and 30 include a first transmission line 20 that requires noise shielding and a second transmission line 30 that does not require noise shielding.
  • the noise shielding member 40 is arranged so as to be along only the first transmission line 20 of the plurality of transmission lines 20 and 30 and to cover only the first transmission line 20 of the plurality of transmission lines 20 and 30. Since the noise shielding member 40 is arranged only along the first transmission line 20 that requires noise countermeasures among the plurality of transmission lines 20 and 30, the noise shielding member 40 is provided along all the transmission lines 20 and 30. The material cost of the noise shielding member 40 can be reduced as compared with the case where the noise shielding member 40 is provided.
  • the magnetic material layer 41 constituting the noise shielding member 40 is preferably in the form of a sheet containing a magnetic material.
  • the electromagnetic noise generated from the first transmission line 20 is absorbed by the magnetic loss of the magnetic material. Thereby, a high noise shielding effect can be obtained.
  • the pair of noise shielding members 40 are arranged so as to sandwich the first transmission line 20, and face each other in a direction orthogonal to the wiring direction of the first transmission line 20. Compared with the case where the noise countermeasure of the first transmission line 20 is taken only by one noise shielding member 40, the form in which the first transmission line 20 is sandwiched between the pair of noise shielding members 40 can obtain a higher noise shielding effect. can.
  • the noise shielding member 40 is arranged so as to cover only a part of the total length of the first transmission line 20 and cover only a part of the total length of the first transmission line 20.
  • the magnetic material layer 41 constituting the noise shielding member 40 is elongated along the wiring direction of the first transmission line 20.
  • the length dimension of the magnetic material layer 41 is 500 mm or more. According to this configuration, the material cost of the noise shielding member 40 can be reduced without reducing the noise shielding effect. Further, a higher noise shielding effect can be obtained as compared with the case where the length of the noise shielding member 40 is less than 500 mm.
  • An electric circuit 46 is connected to the end of the first transmission line 20.
  • the noise shielding member 40 is arranged only in a region near the end of the first transmission line 20. According to this configuration, the electromagnetic noise generated in the electric circuit 46 is reflected toward the electric circuit 46 side at the end of the first transmission line 20. Therefore, as compared with the case where the noise shielding member 40 is arranged at the central portion in the length direction of the first transmission line 20, the influence of the electromagnetic noise generated in the electric circuit 46 is less likely to reach the first transmission line 20.
  • the magnetic material layer 41 of the noise shielding member 40 has a sheet shape. Since the thickness dimension of the magnetic material layer 41 is 200 ⁇ m to 400 ⁇ m, a high noise shielding effect can be obtained.
  • the magnetic material layer 41 of the noise shielding member 40 is in the form of a sheet having a constant width. Since the width dimension of the magnetic material layer 41 is 15 mm or more, a high noise shielding effect can be obtained.
  • the present invention is not limited to the examples described in the above description and drawings, but is shown by the scope of claims.
  • the present invention includes the meaning equivalent to the scope of claims and all modifications within the scope of claims, and is intended to include the following embodiments.
  • the first transmission line is a coaxial cable, but the first transmission line may be a twisted pair line.
  • the noise shielding member has a fixed width sheet shape, but the noise shielding member may have a linear shape.
  • the material of the sheath of the first transmission line is PCV (polyvinyl chloride), but the material of the sheath may be other than PVC.
  • the material of the welding layer of the noise shielding member is PCV (polyvinyl chloride), but the material of the welding layer may be other than PVC.
  • a ... Sheet-shaped conductive path S ... Single-shielded conductive path W ... Double-shielded conductive path 10 ... Sheet material 11 ... Trunk line wiring section 12 ... Branch line wiring section 20 ... First transmission line 21 ... Trunk line section 22 ... Branch line section 24 ... Conductor 25 ... Insulator 26 ... Shield layer 27 ... Sheath 30 ... Second transmission line 31 ... Core wire 32 ... Insulation coating 40 ... Noise shielding member 41 ... Magnetic material layer 42 ... Welding layer 43 ... Protective layer 45 ... Connector 46 ... Electric circuit

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Insulated Conductors (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Structure Of Printed Boards (AREA)
  • Details Of Indoor Wiring (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)

Abstract

The present invention reduces cost.　This sheet-shaped electrical conduction path (A) is provided with: a sheet material (10) having flexibility; a plurality of transmission paths (20, 30) routed in an array on the sheet material (10); and a noise shielding member (40) provided on the sheet material (10). The plurality of transmission paths (20, 30) include a first transmission path (20) that needs noise shielding and a second transmission path (30) that does not need noise shielding. The noise shielding member (40) is disposed along only the first transmission path (20) of the plurality of transmission paths (20, 30).

Description

シート状導電路Sheet-shaped conductive path
　本開示は、シート状導電路に関するものである。 This disclosure relates to a sheet-shaped conductive path.
　特許文献１には、複数の電線が配置されたフラットケーブルと、ノイズ遮蔽シートとを重ね合わせた電線組付体が開示されている。ノイズ遮蔽シートは、電線に関する電磁ノイズの影響を抑制する。 Patent Document 1 discloses an electric wire assembly in which a flat cable in which a plurality of electric wires are arranged and a noise shielding sheet are superposed. The noise shielding sheet suppresses the influence of electromagnetic noise on electric wires.
特開２０１６－１２０７５９号公報JP-A-2016-120759
　上記のノイズ遮蔽シートはフラットケーブルの全面を覆っているので、電磁ノイズ対策の必要がない電線までもノイズ遮蔽シートで覆われることになる。そのため、ノイズ遮蔽シートのコストが高くなる。
　本開示のシート状導電路は、上記のような事情に基づいて完成されたものであって、コストを低減することを目的とする。 Since the above noise shielding sheet covers the entire surface of the flat cable, even electric wires that do not require electromagnetic noise countermeasures are covered with the noise shielding sheet. Therefore, the cost of the noise shielding sheet becomes high.
The sheet-shaped conductive path of the present disclosure has been completed based on the above circumstances, and an object of the present disclosure is to reduce costs.
　本開示のシート状導電路は、
　可撓性を有するシート材と、
　前記シート材に並べて配索された複数の伝送路と、
　前記シート材に設けられたノイズ遮蔽部材とを備え、
　前記複数の伝送路は、ノイズ遮蔽が必要な第１伝送路と、ノイズ遮蔽が不要な第２伝送路とを含み、
　前記ノイズ遮蔽部材は、前記複数の伝送路のうち前記第１伝送路のみに沿うように配置されている。 The sheet-shaped conductive path of the present disclosure is
Flexible sheet material and
A plurality of transmission lines arranged side by side on the sheet material and
A noise shielding member provided on the sheet material is provided, and the sheet material is provided with a noise shielding member.
The plurality of transmission lines include a first transmission line that requires noise shielding and a second transmission line that does not require noise shielding.
The noise shielding member is arranged so as to be along only the first transmission line among the plurality of transmission lines.
　本開示によれば、コストを低減することができる。 According to the present disclosure, the cost can be reduced.
図１は、実施例１のシート状導電路の平面図である。FIG. 1 is a plan view of the sheet-shaped conductive path of the first embodiment. 図２は、シート状導電路の分解斜視図である。FIG. 2 is an exploded perspective view of the sheet-shaped conductive path. 図３は、シート状導電路の断面図である。FIG. 3 is a cross-sectional view of the sheet-shaped conductive path. 図４は、シールド性能の測定対象であるダブルシールド導電路の概略側面図である。FIG. 4 is a schematic side view of the double-shielded conductive path whose shield performance is to be measured. 図５は、シールド性能の測定対象である第１比較例の概略側面図である。FIG. 5 is a schematic side view of a first comparative example, which is a measurement target of the shield performance. 図６は、シールド性能の測定対象である第２比較例の概略側面図である。FIG. 6 is a schematic side view of a second comparative example, which is a measurement target of the shield performance. 図７は、シールド性能の測定対象である第３比較例の概略側面図である。FIG. 7 is a schematic side view of a third comparative example, which is a measurement target of the shield performance. 図８は、シールド性能の測定対象である第６比較例の概略側面図である。FIG. 8 is a schematic side view of a sixth comparative example, which is a measurement target of the shield performance. 図９は、シールド性能の測定対象である第７比較例の概略側面図である。FIG. 9 is a schematic side view of a seventh comparative example, which is a measurement target of the shield performance. 図１０は、ダブルシールド導電路、シングルシールド導電路及び第１比較例のシールド性能をあらわすグラフである。FIG. 10 is a graph showing the shield performance of the double-shielded conductive path, the single-shielded conductive path, and the first comparative example. 図１１は、シングルシールド導電路、第２比較例及び第３比較例のシールド性能をあらわすグラフである。FIG. 11 is a graph showing the shield performance of the single-shielded conductive path, the second comparative example, and the third comparative example. 図１２は、シングルシールド導電路、第４比較例及び第５比較例のシールド性能をあらわすグラフである。FIG. 12 is a graph showing the shield performance of the single-shielded conductive path, the fourth comparative example, and the fifth comparative example. 図１３は、シングルシールド導電路、第６比較例及び第７比較例のシールド性能をあらわすグラフである。FIG. 13 is a graph showing the shield performance of the single shield conductive path, the sixth comparative example and the seventh comparative example. 図１４は、シングルシールド導電路、第８比較例及び第９比較例のシールド性能をあらわすグラフである。FIG. 14 is a graph showing the shield performance of the single-shielded conductive path, the eighth comparative example and the ninth comparative example. 図１５は、シングルシールド導電路、第１０比較例及び第１１比較例のシールド性能をあらわすグラフである。FIG. 15 is a graph showing the shield performance of the single-shielded conductive path, the tenth comparative example and the eleventh comparative example. 図１６は、シングルシールド導電路、第１２比較例及び第１３比較例のシールド性能をあらわすグラフである。FIG. 16 is a graph showing the shield performance of the single-shielded conductive path, the twelfth comparative example and the thirteenth comparative example. 図１７は、第１４比較例、第１５比較例及び第１６比較例の概略側面図である。FIG. 17 is a schematic side view of the 14th Comparative Example, the 15th Comparative Example, and the 16th Comparative Example. 図１８は、シングルシールド導電路、第１４比較例、第１５比較例及び第１６比較例のシールド性能をあらわすグラフである。FIG. 18 is a graph showing the shield performance of the single-shielded conductive path, the 14th comparative example, the 15th comparative example, and the 16th comparative example.
　［本開示の実施形態の説明］
　最初に本開示の実施形態を列記して説明する。
　本開示のシート状導電路は、
　（１）可撓性を有するシート材と、前記シート材に並べて配索された複数の伝送路と、前記シート材に設けられたノイズ遮蔽部材とを備え、前記複数の伝送路は、ノイズ遮蔽が必要な第１伝送路と、ノイズ遮蔽が不要な第２伝送路とを含み、前記ノイズ遮蔽部材は、前記複数の伝送路のうち前記第１伝送路のみに沿うように配置されている。本開示の構成によれば、ノイズ遮蔽部材は、複数の伝送路のうちノイズ対策が必要な第１伝送路のみに沿って配置されているので、ノイズ遮蔽部材の材料コストを低減することができる。 [Explanation of Embodiments of the present disclosure]
First, the embodiments of the present disclosure will be listed and described.
The sheet-shaped conductive path of the present disclosure is
(1) A flexible sheet material, a plurality of transmission lines arranged side by side on the sheet material, and a noise shielding member provided on the sheet material are provided, and the plurality of transmission lines are noise shielding. The noise shielding member is arranged along only the first transmission line among the plurality of transmission lines, including a first transmission line that requires noise shielding and a second transmission line that does not require noise shielding. According to the configuration of the present disclosure, since the noise shielding member is arranged only along the first transmission line that requires noise countermeasures among the plurality of transmission lines, the material cost of the noise shielding member can be reduced. ..
　（２）前記ノイズ遮蔽部材は、磁性材を含んだシート状をなしていることが好ましい。この構成によれば、第１伝送路から発する電磁ノイズを磁性材の磁気損失によって吸収し、高いノイズ遮蔽効果を得ることができる。 (2) The noise shielding member preferably has a sheet shape containing a magnetic material. According to this configuration, the electromagnetic noise generated from the first transmission line is absorbed by the magnetic loss of the magnetic material, and a high noise shielding effect can be obtained.
　（３）一対の前記ノイズ遮蔽部材が、前記第１伝送路を挟んで対向するように配置されていることが好ましい。この構成によれば、１つのノイズ遮蔽部材だけで伝送路のノイズ対策を講じる場合に比べると、高いノイズ遮蔽効果を得ることができる。 (3) It is preferable that the pair of noise shielding members are arranged so as to face each other with the first transmission line interposed therebetween. According to this configuration, a higher noise shielding effect can be obtained as compared with the case where noise countermeasures for transmission lines are taken with only one noise shielding member.
　（４）前記ノイズ遮蔽部材は、前記第１伝送路の全長のうち一部のみに沿うように配置されていることが好ましい。この構成によれば、ノイズ遮蔽効果を低下させることなく、ノイズ遮蔽部材の材料コストを低減することができる。 (4) It is preferable that the noise shielding member is arranged along only a part of the total length of the first transmission line. According to this configuration, the material cost of the noise shielding member can be reduced without reducing the noise shielding effect.
　（５）（４）において、前記第１伝送路の配索方向における前記ノイズ遮蔽部材の長さ寸法は、５００ｍｍ以上であることが好ましい。この構成によれば、ノイズ遮蔽部材の長さが５００ｍｍ未満である場合に比べると、高いノイズ遮蔽効果を得ることができる。 In (5) and (4), the length dimension of the noise shielding member in the wiring direction of the first transmission line is preferably 500 mm or more. According to this configuration, a higher noise shielding effect can be obtained as compared with the case where the length of the noise shielding member is less than 500 mm.
　（６）（４）又は（５）において、前記第１伝送路の端部には、電気回路が接続されるようになっており、前記ノイズ遮蔽部材は、前記第１伝送路の端部の近傍領域のみに配置されていることが好ましい。この構成によれば、電気回路で発生した電磁ノイズが、第１伝送路の端部において電気回路側へ反射する。したがって、ノイズ遮蔽部材が第１伝送路の長さ方向における中央部に配置されている場合に比べると、電気回路で発生した電磁ノイズの影響が第１伝送路に及び難い。 (6) In (4) or (5), an electric circuit is connected to the end of the first transmission line, and the noise shielding member is the end of the first transmission line. It is preferably arranged only in the vicinity area. According to this configuration, the electromagnetic noise generated in the electric circuit is reflected toward the electric circuit side at the end of the first transmission line. Therefore, as compared with the case where the noise shielding member is arranged at the central portion in the length direction of the first transmission line, the influence of the electromagnetic noise generated in the electric circuit is less likely to reach the first transmission line.
　（７）前記ノイズ遮蔽部材はシート状をなしており、前記ノイズ遮蔽部材の厚さ寸法は、２００μｍ～４００μｍであることが好ましい。この構成によれば、高いノイズ遮蔽効果を得ることができる。 (7) The noise shielding member has a sheet shape, and the thickness dimension of the noise shielding member is preferably 200 μm to 400 μm. According to this configuration, a high noise shielding effect can be obtained.
　（８）前記ノイズ遮蔽部材は一定幅のシート状をなしており、前記ノイズ遮蔽部材の幅寸法は、１５ｍｍ以上であることが好ましい。この構成によれば、高いノイズ遮蔽効果を得ることができる。 (8) The noise shielding member is in the form of a sheet having a constant width, and the width dimension of the noise shielding member is preferably 15 mm or more. According to this configuration, a high noise shielding effect can be obtained.
　［本開示の実施形態の詳細］
　［実施例１］
　本開示のシート状導電路Ａを具体化した実施例１を、図１～図１８を参照して説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。本実施例１において、上下の方向については、図２，３にあらわれる向きを、そのまま上方、下方と定義する。 [Details of Embodiments of the present disclosure]
[Example 1]
Example 1 embodying the sheet-shaped conductive path A of the present disclosure will be described with reference to FIGS. 1 to 18. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. In the first embodiment, with respect to the vertical direction, the directions appearing in FIGS. 2 and 3 are defined as upward and downward as they are.
　本実施例１のシート状導電路Ａは、一対のシート材１０と、１本の第１伝送路２０と、複数本の第２伝送路３０と、複数対のノイズ遮蔽部材４０と、複数のコネクタ４５とを備えて構成されている。シート状導電路Ａは、車両のボディ（図示省略）に取り付けられるものである。ボディにおけるシート状導電路Ａの取付対象としては、ルーフやドアパネル等がある。シート状導電路Ａは、例えばルーフに取り付けた外部アンテナ（図示省略）とＥＣＵ（電子制御ユニット）との間に接続される。 The sheet-shaped conductive path A of the first embodiment includes a pair of sheet materials 10, a first transmission line 20, a plurality of second transmission lines 30, a plurality of pairs of noise shielding members 40, and a plurality of sheets. It is configured to include a connector 45. The sheet-shaped conductive path A is attached to a vehicle body (not shown). Targets for attaching the sheet-shaped conductive path A in the body include a roof, a door panel, and the like. The sheet-shaped conductive path A is connected between, for example, an external antenna (not shown) attached to the roof and an ECU (electronic control unit).
　一対のシート材１０は、可撓性を有し、かつ電気的絶縁性を有する合成樹脂材からなる。シート材１０の材料としては、ＰＶＣ（ポリ塩化ビニル）等の樹脂材料が用いられている。シート材１０の樹脂材料としては、後述する第１伝送路２０のシース２７及び第２伝送路３０の絶縁被覆３２との溶着強度が高いものが選択されている。図１に示すように、シート材１０は、１つの幹線用配線部１１と、幹線用配線部１１の側縁部から分岐状に突出した支線用配線部１２とを有する。以下の説明では、便宜上、シート材１０を水平に配置したと想定する。 The pair of sheet materials 10 are made of a synthetic resin material having flexibility and electrical insulation. As the material of the sheet material 10, a resin material such as PVC (polyvinyl chloride) is used. As the resin material of the sheet material 10, a material having high welding strength with the sheath 27 of the first transmission line 20 and the insulating coating 32 of the second transmission line 30, which will be described later, is selected. As shown in FIG. 1, the sheet material 10 has one trunk line wiring portion 11 and a branch line wiring portion 12 protruding from the side edge portion of the trunk line wiring portion 11 in a branched shape. In the following description, it is assumed that the sheet material 10 is arranged horizontally for convenience.
　図２に示すように、上下一対のシート材１０の間には、第１伝送路２０と第２伝送路３０が上下から挟まれた状態で水平に配索されている。図１に示すように、第１伝送路２０は、幹線用配線部１１に沿って配索された幹線部２１と、支線用配線部１２に沿って配索された支線部２２とを有する。図１では省略するが、第２伝送路３０も、幹線用配線部１１に沿って配索された幹線部（図示省略）と、支線用配線部１２に沿って配索された支線部（図示省略）とを有する。 As shown in FIG. 2, between the upper and lower pair of sheet materials 10, the first transmission line 20 and the second transmission line 30 are horizontally arranged so as to be sandwiched from above and below. As shown in FIG. 1, the first transmission line 20 has a trunk line portion 21 arranged along the trunk line wiring portion 11 and a branch line portion 22 arranged along the branch line wiring portion 12. Although omitted in FIG. 1, the second transmission line 30 also has a trunk line portion (not shown) arranged along the trunk line wiring portion 11 and a branch line portion arranged along the branch line wiring portion 12 (not shown). Omitted) and.
　第１伝送路２０は、通信回路の導電路であるため、同軸ケーブルで構成されている。図３に示すように、同軸ケーブルは、導体２４と、導体２４を包囲する筒状の絶縁体２５と、絶縁体２５の外周を包囲する編組線等からなるシールド層２６と、シールド層２６を包囲する円筒形のシース２７とを有する。シース２７は、ＰＶＣ（ポリ塩化ビニル）からなる。 Since the first transmission line 20 is a conductive line of a communication circuit, it is composed of a coaxial cable. As shown in FIG. 3, the coaxial cable includes a conductor 24, a cylindrical insulator 25 surrounding the conductor 24, a shield layer 26 composed of a braided wire or the like surrounding the outer circumference of the insulator 25, and a shield layer 26. It has a cylindrical sheath 27 that surrounds it. The sheath 27 is made of PVC (polyvinyl chloride).
　第１伝送路２０は、例えばルーフに取り付けた外部アンテナ（図示省略）で受信した信号を１Ｇｂｐｓ以上の高速度でＥＣＵに伝送する。第１伝送路２０には１ＧＨｚ以上の高周波の電流が流れる。高周波電流は、コモンモードノイズ等の発生原因となる。そのため、第１伝送路２０に関しては、電磁ノイズ対策として同軸ケーブルを用いた上で、更に、ノイズ対策の信頼性を高めるためにノイズ遮蔽部材４０を設けている。 The first transmission line 20 transmits, for example, a signal received by an external antenna (not shown) attached to the roof to the ECU at a high speed of 1 Gbps or more. A high frequency current of 1 GHz or more flows through the first transmission line 20. High-frequency current causes common mode noise and the like. Therefore, regarding the first transmission line 20, a coaxial cable is used as a countermeasure against electromagnetic noise, and a noise shielding member 40 is provided in order to further improve the reliability of the noise countermeasure.
　第２伝送路３０は、芯線３１の外周を、円筒形の絶縁被覆３２で包囲したものである。絶縁被覆３２は、第１伝送路２０のシース２７と同じく、ＰＶＣ（ポリ塩化ビニル）からなる。第２伝送路３０は、電力供給等の導電路として用いられるものである。第２伝送路３０に関しては、電磁ノイズ対策は不要である。 The second transmission line 30 surrounds the outer circumference of the core wire 31 with a cylindrical insulating coating 32. The insulating coating 32 is made of PVC (polyvinyl chloride) like the sheath 27 of the first transmission line 20. The second transmission line 30 is used as a conductive line for power supply and the like. No measures against electromagnetic noise are required for the second transmission line 30.
　シート材１０の幹線用配線部１１においては、第１伝送路２０の幹線部２１と第２伝送路３０の幹線部（図示省略）が互いに平行に並ぶように配索されている。支線用配線部１２においては、第１伝送路２０の支線部２２と第２伝送路３０の支線部（図示省略）とが互いに平行に並ぶように配置される形態か、第１伝送路２０の支線部２２のみが配索される形態か、第２伝送路３０の支線部（図示省略）のみが配索される形態のいずれかが採用される。 In the trunk line wiring portion 11 of the sheet material 10, the trunk line portion 21 of the first transmission line 20 and the trunk line portion (not shown) of the second transmission line 30 are arranged so as to be arranged in parallel with each other. In the branch line wiring portion 12, the branch line portion 22 of the first transmission line 20 and the branch line portion (not shown) of the second transmission line 30 are arranged so as to be arranged in parallel with each other, or the first transmission line 20 Either a form in which only the branch line portion 22 is laid out or a form in which only the branch line portion (not shown) of the second transmission line 30 is laid out is adopted.
　ノイズ遮蔽部材４０は、可撓性を有し、細長いシート状をなす。ノイズ遮蔽部材４０の幅寸法は、第１伝送路２０の直径寸法よりも大きい。図３に示すように、ノイズ遮蔽部材４０は、薄膜状の磁性体層４１と、薄膜状の溶着層４２と、薄膜状の保護層４３とを順に積層した三層構造のものである。磁性体層４１は、フェライト、電磁純鉄、けい素鉄等の軟質磁性材からなる粉体を合成樹脂内に分散して混合したものである。磁性体層４１は、磁気損失により、高周波の電磁ノイズを熱に変換して消滅させる。磁性体層４１は、溶着層４２と保護層４３とに挟まれている。なお、図３においては、便宜上、磁性体層４１、溶接層及び保護層４３の厚さを、誇張して描いている。溶着層４２は、第１伝送路２０のシース２７及び第２伝送路３０の絶縁被覆３２と同じく、ＰＶＣ（ポリ塩化ビニル）からなる。保護層４３は、ＰＥＴ（ポリエチレンテレフタレート）からなる。 The noise shielding member 40 has flexibility and forms an elongated sheet shape. The width dimension of the noise shielding member 40 is larger than the diameter dimension of the first transmission line 20. As shown in FIG. 3, the noise shielding member 40 has a three-layer structure in which a thin-film magnetic layer 41, a thin-film welding layer 42, and a thin-film protective layer 43 are laminated in this order. The magnetic material layer 41 is obtained by dispersing and mixing powder made of a soft magnetic material such as ferrite, electromagnetic pure iron, and silicon iron in a synthetic resin. The magnetic material layer 41 converts high-frequency electromagnetic noise into heat and eliminates it due to magnetic loss. The magnetic material layer 41 is sandwiched between the welding layer 42 and the protective layer 43. In FIG. 3, for convenience, the thicknesses of the magnetic layer 41, the welding layer, and the protective layer 43 are exaggerated. The welding layer 42 is made of PVC (polyvinyl chloride) like the sheath 27 of the first transmission line 20 and the insulating coating 32 of the second transmission line 30. The protective layer 43 is made of PET (polyethylene terephthalate).
　図１に示すように、ノイズ遮蔽部材４０は、第１伝送路２０の幹線部２１と支線部２２に沿って細長く帯状に延びた形状をなしている。ノイズ遮蔽部材４０は、第１伝送路２０のうち、幹線部２１の両端部の近傍領域と、支線部２２の延出端部の近傍領域のみに配置されている。これらの以外の領域には、ノイズ遮蔽部材４０は配置されていない。第１伝送路２０の端部に設けたコネクタ４５には、アンテナやＥＣＵ等の電気回路４６が接続されるようになっている。ノイズ遮蔽部材４０は、これらの電気回路４６の近傍に配置されている。 As shown in FIG. 1, the noise shielding member 40 has a shape extending in an elongated strip shape along the trunk line portion 21 and the branch line portion 22 of the first transmission line 20. The noise shielding member 40 is arranged only in the vicinity region of both ends of the trunk line portion 21 and the vicinity region of the extension end portion of the branch line portion 22 in the first transmission line 20. The noise shielding member 40 is not arranged in the region other than these. An electric circuit 46 such as an antenna or an ECU is connected to the connector 45 provided at the end of the first transmission line 20. The noise shielding member 40 is arranged in the vicinity of these electric circuits 46.
　シート状導電路Ａを製造する際には、水平な治具（図示省略）の上に第１伝送路２０と第２伝送路３０を、所定の配索経路に沿うように配置し、その上に、一方のシート材１０を載せ、このシート材１０の上に複数のノイズ遮蔽部材４０を重ねるように載置する。このとき、ノイズ遮蔽部材４０は、第１伝送路２０の配索経路のうち幹線部２１の両端部のみと、支線部２２の延出端部のみとに沿うように配置する。換言すると、ノイズ遮蔽部材４０は、第１伝送路２０の配索経路のうち幹線部２１の両端部のみと、支線部２２の延出端部のみとを覆うように配置される。この状態で、超音波溶着を行う。超音波溶着の工程では、シート材１０と第１伝送路２０のシース２７とが溶着され、シート材１０との第２伝送路３０の絶縁被覆３２とが溶着され、ノイズ遮蔽部材４０の溶着層４２とシート材１０とが溶着される。 When manufacturing the sheet-shaped conductive path A, the first transmission line 20 and the second transmission line 30 are arranged on a horizontal jig (not shown) so as to be along a predetermined wiring path, and the first transmission line 20 and the second transmission line 30 are arranged on the horizontal jig (not shown). One sheet material 10 is placed on the sheet material 10, and a plurality of noise shielding members 40 are placed on the sheet material 10 so as to be overlapped with each other. At this time, the noise shielding member 40 is arranged along only both ends of the trunk line portion 21 and only the extending ends of the branch line portion 22 in the wiring path of the first transmission line 20. In other words, the noise shielding member 40 is arranged so as to cover only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20. In this state, ultrasonic welding is performed. In the ultrasonic welding step, the sheet material 10 and the sheath 27 of the first transmission line 20 are welded, the insulating coating 32 of the second transmission line 30 is welded to the sheet material 10, and the welding layer of the noise shielding member 40 is welded. 42 and the sheet material 10 are welded together.
　上記のようにして一体化した第１伝送路２０と第２伝送路３０と一方のシート材１０と一方のノイズ遮蔽部材４０を、上下反転させる。そして、第１伝送路２０と第２伝送路３０の上に他方のシート材１０を載せ、このシート材１０の上にノイズ遮蔽部材４０を重ねるように載置する。このときも、ノイズ遮蔽部材４０は、第１伝送路２０の配索経路のうち幹線部２１の両端部のみと、支線部２２の延出端部のみとに沿うように配置する。換言すると、ノイズ遮蔽部材４０は、第１伝送路２０の配索経路のうち幹線部２１の両端部のみと、支線部２２の延出端部のみとを覆うように配置される。この後、上記と同様に超音波溶着を行い、第１伝送路２０と第２伝送路３０と他方のシート材１０と他方のノイズ遮蔽部材４０を固着して一体化させる。以上により、シート状導電路Ａが完成する。第１伝送路２０の配索経路のうち幹線部２１の両端部と、支線部２２の延出端部は、一対のノイズ遮蔽部材４０によって挟まれた状態で覆われる。 The first transmission line 20, the second transmission line 30, one sheet material 10, and one noise shielding member 40 integrated as described above are turned upside down. Then, the other sheet material 10 is placed on the first transmission line 20 and the second transmission line 30, and the noise shielding member 40 is placed on the sheet material 10 so as to be overlapped with each other. Also at this time, the noise shielding member 40 is arranged so as to be along only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20. In other words, the noise shielding member 40 is arranged so as to cover only both ends of the trunk line portion 21 and only the extending end portion of the branch line portion 22 in the wiring path of the first transmission line 20. After that, ultrasonic welding is performed in the same manner as described above, and the first transmission line 20, the second transmission line 30, the other sheet material 10 and the other noise shielding member 40 are fixed and integrated. As described above, the sheet-shaped conductive path A is completed. Of the wiring paths of the first transmission line 20, both ends of the trunk line portion 21 and the extending ends of the branch line portion 22 are covered with a pair of noise shielding members 40.
　次に、シールド形態の異なる場合のシールド性能を、ＩＥＣ６２１５３－４－４に準拠したＴｒｉａｘｉａｌ測定方法によって測定した。測定対象は、ダブルシールド導電路Ｗと、シングルシールド導電路Ｓと、ノイズ遮蔽部材４０の配置や寸法の異なる第１比較例～第１６比較例である。ダブルシールド導電路Ｗは、実施例１と同一の同軸ケーブルからなる第１伝送路２０に、実施例１の磁性体層４１と同じ寸法の磁性体層４１を有するノイズ遮蔽部材４０を設けたものである。シングルシールド導電路Ｓは、ノイズ遮蔽部材４０を設けずに本実施例１の同軸ケーブルのシールド層２６のみでノイズ遮蔽を行うものである。 Next, the shield performance when the shield form was different was measured by a triaxial measurement method based on IEC62153-4-4. The measurement targets are the first comparative example to the 16th comparative example in which the arrangement and dimensions of the double-shielded conductive path W, the single-shielded conductive path S, and the noise shielding member 40 are different. The double-shielded conductive path W is provided with a noise shielding member 40 having a magnetic material layer 41 having the same dimensions as the magnetic material layer 41 of the first embodiment in a first transmission line 20 made of the same coaxial cable as in the first embodiment. Is. The single-shielded conductive path S performs noise shielding only by the shield layer 26 of the coaxial cable of the first embodiment without providing the noise shielding member 40.
　図４に示すのは、ダブルシールド導電路Ｗの概略側面図である。ダブルシールド導電路Ｗでは、ノイズ遮蔽部材４０が、第１伝送路２０を挟むように一対ずつ設けられている。以下、一対のノイズ遮蔽部材４０が第１伝送路２０を挟む配置形態を「両面配置」という。一対のノイズ遮蔽部材４０は、第１伝送路２０の両端部に配置されている。以下、ノイズ遮蔽部材４０が第１伝送路２０の両端部に配置されている形態を「両端配置」という。第１伝送路２０の配索方向における磁性体層４１の長さ寸法は、５００ｍｍである。磁性体層４１の厚さ寸法は、２００μｍである。磁性体層４１の幅寸法は、１５ｍｍである。 FIG. 4 is a schematic side view of the double-shielded conductive path W. In the double-shielded conductive path W, a pair of noise-shielding members 40 are provided so as to sandwich the first transmission path 20. Hereinafter, the arrangement form in which the pair of noise shielding members 40 sandwich the first transmission line 20 is referred to as “double-sided arrangement”. The pair of noise shielding members 40 are arranged at both ends of the first transmission line 20. Hereinafter, the form in which the noise shielding member 40 is arranged at both ends of the first transmission line 20 is referred to as “both ends arrangement”. The length dimension of the magnetic material layer 41 in the wiring direction of the first transmission line 20 is 500 mm. The thickness dimension of the magnetic material layer 41 is 200 μm. The width dimension of the magnetic material layer 41 is 15 mm.
　図５に示すのは、第１比較例Ｃ１の概略側面図である。第１比較例Ｃ１では、両面配置のノイズ遮蔽部材４０が、第１伝送路２０の長さ方向中央部に配置されている。以下、ノイズ遮蔽部材４０が長さ方向中央部に配置されている形態を「中央配置」という。ノイズ遮蔽部材４０の磁性体層４１の寸法は、ダブルシールド導電路Ｗと同じ寸法である。 FIG. 5 is a schematic side view of the first comparative example C1. In the first comparative example C1, the noise shielding member 40 arranged on both sides is arranged at the central portion in the length direction of the first transmission line 20. Hereinafter, the form in which the noise shielding member 40 is arranged in the central portion in the length direction is referred to as “center arrangement”. The dimension of the magnetic material layer 41 of the noise shielding member 40 is the same as the dimension of the double shield conductive path W.
　図１０に示すのは、ダブルシールド導電路Ｗのシールド性能と、シングルシールド導電路Ｓのシールド性能と、第１比較例Ｃ１のシールド性能をあらわすグラフである。図１０のグラフからは、ダブルシールド導電路Ｗのシールド性能の方が、シングルシールド導電路Ｓのシールド性能よりも優れている。一方、第１比較例Ｃ１のシールド性能は、総じてシングルシールド導電路Ｓと同じレベルである。したがって、両端配置のシールド性能は中央配置のシールド性能よりも優れている。 FIG. 10 is a graph showing the shielding performance of the double-shielded conductive path W, the shielding performance of the single-shielded conductive path S, and the shielding performance of the first comparative example C1. From the graph of FIG. 10, the shielding performance of the double-shielded conductive path W is superior to the shielding performance of the single-shielded conductive path S. On the other hand, the shielding performance of the first comparative example C1 is generally the same level as that of the single-shielded conductive path S. Therefore, the shielding performance of both ends arrangement is superior to the shielding performance of the central arrangement.
　図６に示すのは、第２比較例Ｃ２の概略側面図である。第２比較例Ｃ２は、両端配置であるが、各端部においては１枚のノイズ遮蔽部材４０のみが第１伝送路２０に沿って配置されている。以下、１枚のノイズ遮蔽部材４０のみが第１伝送路２０に沿って配置される形態を「片面配置」という。「片面配置」では、ノイズ遮蔽部材４０が第１伝送路２０の片側だけを覆う。図７に示すのは、第３比較例Ｃ３の概略側面図である。第３比較例Ｃ３では、片面配置のノイズ遮蔽部材４０が、中央配置されている。 FIG. 6 is a schematic side view of the second comparative example C2. In the second comparative example C2, both ends are arranged, but at each end, only one noise shielding member 40 is arranged along the first transmission line 20. Hereinafter, a form in which only one noise shielding member 40 is arranged along the first transmission line 20 is referred to as “single-sided arrangement”. In the "single-sided arrangement", the noise shielding member 40 covers only one side of the first transmission line 20. FIG. 7 is a schematic side view of Third Comparative Example C3. In the third comparative example C3, the noise shielding member 40 arranged on one side is arranged in the center.
　図１１のグラフは、シングルシールド導電路Ｓのシールド性能と、第２比較例Ｃ２のシールド性能と、第３比較例Ｃ３のシールド性能をあらわす。図１１のグラフに示すように、両端配置の第２比較例Ｃ２のシールド性能は、シングルシールド導電路Ｓのシールド性能と総じて同じレベルである。一方、中央配置の第３比較例Ｃ３のシールド性能は、シングルシールド導電路Ｓのシールド性能及び第２比較例Ｃ２のシールド性能よりも低い。図１１に示すグラフからも、両端配置のシールド性能の方が中央配置のシールド性能よりも優れていることが判る。 The graph of FIG. 11 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the second comparative example C2, and the shielding performance of the third comparative example C3. As shown in the graph of FIG. 11, the shielding performance of the second comparative example C2 arranged at both ends is generally at the same level as the shielding performance of the single-shielded conductive path S. On the other hand, the shield performance of the third comparative example C3 arranged in the center is lower than the shield performance of the single shield conductive path S and the shield performance of the second comparative example C2. From the graph shown in FIG. 11, it can be seen that the shielding performance at both ends is superior to the shielding performance at the center.
　図１２のグラフは、シングルシールド導電路Ｓのシールド性能と、第４比較例Ｃ４のシールド性能と、第５比較例Ｃ５のシールド性能をあらわす。第４比較例Ｃ４は、ダブルシールド導電路Ｗと同じく両面配置かつ両端配置であるが、磁性体層４１の長さを２５０ｍｍにしたものである。第５比較例Ｃ５は、両面配置かつ中央配置の第１比較例Ｃ１において、磁性体層４１の長さを第４比較例Ｃ４と同じく２５０ｍｍに変更したものである。 The graph of FIG. 12 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the fourth comparative example C4, and the shielding performance of the fifth comparative example C5. The fourth comparative example C4 has the same double-sided arrangement and both ends arrangement as the double-shielded conductive path W, but the length of the magnetic material layer 41 is 250 mm. In the fifth comparative example C5, the length of the magnetic material layer 41 is changed to 250 mm as in the fourth comparative example C4 in the first comparative example C1 arranged on both sides and in the center.
　図１２のグラフに示すように、両端配置の第４比較例Ｃ４のシールド性能は、シングルシールド導電路Ｓのシールド性能に比べると、２．５ＧＨｚ～３．０ＧＨｚの高周波帯域において優れている。一方、中央配置の第５比較例Ｃ５のシールド性能は、シングルシールド導電路Ｓのシールド性能と総じて同じレベルである。図１２のグラフからは、磁性体層４１の長さを２５０ｍｍ程度に短くしてしまうと、両端配置と中央配置とでシールド性能に大きな差異がなくなるということが判る。 As shown in the graph of FIG. 12, the shielding performance of the fourth comparative example C4 arranged at both ends is superior to the shielding performance of the single-shielded conductive path S in the high frequency band of 2.5 GHz to 3.0 GHz. On the other hand, the shield performance of the fifth comparative example C5 arranged in the center is generally the same level as the shield performance of the single shield conductive path S. From the graph of FIG. 12, it can be seen that if the length of the magnetic material layer 41 is shortened to about 250 mm, there is no significant difference in the shielding performance between the both end arrangement and the center arrangement.
　図８に示すのは、第６比較例Ｃ６の概略側面図である。第６比較例Ｃ６は、第１伝送路２０の両端部のうち、ノイズ発生源となる電気回路４６に近い側の端部のみに、両面配置のノイズ遮蔽部材４０を設けている。以下、第１伝送路２０の両端部のうち一方の端部のみにノイズ遮蔽部材４０を配置する形態を、「片端配置」という。図９に示すのは、第７比較例Ｃ７の概略側面図である。第７比較例Ｃ７も、第６比較例Ｃ６と同じく両面配置かつ片端配置であるが、第７比較例Ｃ７では、第６比較例Ｃ６とは逆に、第１伝送路２０の両端部のうちノイズの発生源となる電気回路４６から遠い側の端部のみに、ノイズ遮蔽部材４０を設けている。磁性体層４１の長さは５００ｍｍである。 FIG. 8 is a schematic side view of the sixth comparative example C6. In the sixth comparative example C6, the noise shielding member 40 arranged on both sides is provided only at the end of the first transmission line 20 on the side close to the electric circuit 46 which is the noise source. Hereinafter, a form in which the noise shielding member 40 is arranged only at one end of both ends of the first transmission line 20 is referred to as “single end arrangement”. FIG. 9 is a schematic side view of the seventh comparative example C7. The seventh comparative example C7 is also arranged on both sides and at one end like the sixth comparative example C6, but in the seventh comparative example C7, contrary to the sixth comparative example C6, of both ends of the first transmission line 20. The noise shielding member 40 is provided only at the end on the side far from the electric circuit 46 that is the source of noise. The length of the magnetic layer 41 is 500 mm.
　図１３のグラフは、シングルシールド導電路Ｓのシールド性能と、第６比較例Ｃ６のシールド性能と、第７比較例Ｃ７のシールド性能をあらわす。このグラフによれば、ノイズ遮蔽部材４０をノイズ発生源から遠い側に配置するよりも、ノイズ遮蔽部材４０をノイズ発生源に近い側に配置する方が、シールド性能に優れていることが判る。 The graph of FIG. 13 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the sixth comparative example C6, and the shielding performance of the seventh comparative example C7. According to this graph, it can be seen that the shielding performance is superior when the noise shielding member 40 is arranged on the side closer to the noise generation source than when the noise shielding member 40 is arranged on the side far from the noise generation source.
　図１４のグラフは、シングルシールド導電路Ｓのシールド性能と、第８比較例Ｃ８のシールド性能と、第９比較例Ｃ９のシールド性能をあらわす。第８比較例Ｃ８と第９比較例Ｃ９は、いずれも、両面配置かつ片端配置である。第８比較例Ｃ８と第９比較例Ｃ９の違いは、第８比較例Ｃ８の磁性体層４１の長さが５００ｍｍであるのに対し、第９比較例Ｃ９の磁性体層４１の長さは２５０ｍｍである。図１４のグラフからは、磁性体層４１の長さが長い方が、シールド性能に優れていることが判る。 The graph of FIG. 14 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the eighth comparative example C8, and the shielding performance of the ninth comparative example C9. Both the eighth comparative example C8 and the ninth comparative example C9 are arranged on both sides and on one end. The difference between the 8th Comparative Example C8 and the 9th Comparative Example C9 is that the length of the magnetic material layer 41 of the 8th Comparative Example C8 is 500 mm, whereas the length of the magnetic material layer 41 of the 9th Comparative Example C9 is It is 250 mm. From the graph of FIG. 14, it can be seen that the longer the magnetic material layer 41 is, the better the shielding performance is.
　図１５のグラフは、シングルシールド導電路Ｓのシールド性能と、第１０比較例Ｃ１０のシールド性能と、第１１比較例Ｃ１１のシールド性能をあらわす。第１０比較例Ｃ１０と第１１比較例Ｃ１１は、いずれも、両面配置かつ両端配置である。第１０比較例Ｃ１０では、第１伝送路２０の各端部における磁性体層４１の長さが７５０ｍｍずつであり、両端部を併せると１５００ｍｍである。第１１比較例Ｃ１１では、第１伝送路２０の各端部における磁性体層４１の長さが２５０ｍｍずつであり、両端部を併せると５００ｍｍの長さが確保されている。図１５のグラフによれば、高周波帯域においては、第１０比較例Ｃ１０のシールド性能と第１１比較例Ｃ１１のシールド性能とに大きな差異がないということが判る。したがって、１本の第１伝送路２０における磁性体層４１の総長が５００ｍｍであれば、充分なノイズ遮蔽効果が得られるということが判る。 The graph of FIG. 15 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the tenth comparative example C10, and the shielding performance of the eleventh comparative example C11. Both the tenth comparative example C10 and the eleventh comparative example C11 are arranged on both sides and arranged on both ends. In the tenth comparative example C10, the length of the magnetic material layer 41 at each end of the first transmission line 20 is 750 mm, and the total length of both ends is 1500 mm. In the eleventh comparative example C11, the length of the magnetic material layer 41 at each end of the first transmission line 20 is 250 mm, and the length of 500 mm is secured when both ends are combined. According to the graph of FIG. 15, it can be seen that there is no significant difference between the shielding performance of the tenth comparative example C10 and the shielding performance of the eleventh comparative example C11 in the high frequency band. Therefore, it can be seen that if the total length of the magnetic material layer 41 in one first transmission line 20 is 500 mm, a sufficient noise shielding effect can be obtained.
　図１６のグラフは、シングルシールド導電路Ｓのシールド性能と、第１２比較例Ｃ１２のシールド性能と、第１３比較例Ｃ１３のシールド性能をあらわす。第１２比較例Ｃ１２と第１３比較例Ｃ１３は、いずれも、両面配置かつ両端配置である。第１伝送路２０の各端部における磁性体層４１の長さは、２５０ｍｍずつであり、両端部を併せると５００ｍｍの長さが確保されている。第１２比較例Ｃ１２では、各磁性体層４１の厚さが２００μｍであるのに対し、第１３比較例Ｃ１３では、各磁性体層４１の厚さが１００μｍである。図１６のグラフによれば、磁性体層４１の厚い第１２比較例Ｃ１２の方が、磁性体層４１の薄い第１３比較例Ｃ１３よりもシールド性能に優れていることが判る。 The graph of FIG. 16 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the twelfth comparative example C12, and the shielding performance of the thirteenth comparative example C13. Both the twelfth comparative example C12 and the thirteenth comparative example C13 are arranged on both sides and both ends. The length of the magnetic material layer 41 at each end of the first transmission line 20 is 250 mm, and a total length of 500 mm is secured when both ends are combined. In the twelfth comparative example C12, the thickness of each magnetic material layer 41 is 200 μm, whereas in the thirteenth comparative example C13, the thickness of each magnetic material layer 41 is 100 μm. According to the graph of FIG. 16, it can be seen that the twelfth comparative example C12 having the thick magnetic material layer 41 is superior in the shielding performance to the thirteenth comparative example C13 having the thin magnetic material layer 41.
　図１７に示すのは、第１４比較例Ｃ１４、第１５比較例Ｃ１５及び第１６比較例Ｃ１６の断面図である。第１４比較例Ｃ１４、第１５比較例Ｃ１５及び第１６比較例Ｃ１６は、いずれも、両面配置かつ両端配置である。各端部における磁性体層４１の長さは、いずれの比較例Ｃ１４，Ｃ１５，Ｃ１６も２５０ｍｍである。各磁性体層４１の厚さは、いずれの比較例Ｃ１４，Ｃ１５，Ｃ１６も２００μｍである。磁性体層４１の幅寸法に関しては、第１４比較例Ｃ１４は１５．０ｍｍであり、第１５比較例Ｃ１５は１０．０ｍｍであり、第１６比較例Ｃ１６は７．５ｍｍである。 FIG. 17 is a cross-sectional view of the 14th Comparative Example C14, the 15th Comparative Example C15, and the 16th Comparative Example C16. The 14th Comparative Example C14, the 15th Comparative Example C15, and the 16th Comparative Example C16 are all arranged on both sides and both ends. The length of the magnetic material layer 41 at each end is 250 mm for all Comparative Examples C14, C15, and C16. The thickness of each magnetic layer 41 is 200 μm in each of Comparative Examples C14, C15, and C16. Regarding the width dimension of the magnetic layer 41, the 14th Comparative Example C14 is 15.0 mm, the 15th Comparative Example C15 is 10.0 mm, and the 16th Comparative Example C16 is 7.5 mm.
　図１８のグラフは、シングルシールド導電路Ｓのシールド性能と、第１４比較例Ｃ１４のシールド性能と、第１５比較例Ｃ１５のシールド性能と、第１６比較例Ｃ１６のシールド性能をあらわす。図１８のグラフに示すように、磁性体層４１の幅が１０．０ｍｍの第１５比較例Ｃ１５と磁性体層４１の幅が７．５ｍｍの第１６比較例Ｃ１６のシールド性能は、シングルシールド導電路Ｓのシールド性能と総じて同じレベルである。これに対し、磁性体層４１の幅が１５．０ｍｍである第１４比較例Ｃ１４のシールド性能は、シングルシールド導電路Ｓ、第１５比較例Ｃ１５及び第１６比較例Ｃ１６のシールド性能よりも優れていることが判る。 The graph of FIG. 18 shows the shielding performance of the single-shielded conductive path S, the shielding performance of the 14th Comparative Example C14, the shielding performance of the 15th Comparative Example C15, and the shielding performance of the 16th Comparative Example C16. As shown in the graph of FIG. 18, the shielding performance of the 15th Comparative Example C15 in which the width of the magnetic material layer 41 is 10.0 mm and the 16th Comparative Example C16 in which the width of the magnetic material layer 41 is 7.5 mm is single shield conductive. It is generally the same level as the shield performance of the road S. On the other hand, the shielding performance of the 14th Comparative Example C14 in which the width of the magnetic layer 41 is 15.0 mm is superior to the shielding performance of the single shield conductive path S, the 15th Comparative Example C15 and the 16th Comparative Example C16. You can see that there is.
　本実施例１のシート状導電路Ａは、可撓性を有するシート材１０と、シート材１０に並べて配索された複数の伝送路２０，３０と、シート材１０に設けられたノイズ遮蔽部材４０とを備える。複数の伝送路２０，３０は、ノイズ遮蔽が必要な第１伝送路２０と、ノイズ遮蔽が不要な第２伝送路３０とを含む。ノイズ遮蔽部材４０は、複数の伝送路２０，３０のうち第１伝送路２０のみに沿い、かつ複数の伝送路２０，３０のうち第１伝送路２０のみを覆うように配置されている。ノイズ遮蔽部材４０は、複数の伝送路２０，３０のうちノイズ対策が必要な第１伝送路２０のみに沿って配置されているので、全ての伝送路２０，３０に沿ってノイズ遮蔽部材４０を設ける場合に比べると、ノイズ遮蔽部材４０の材料コストを低減することができる。 The sheet-shaped conductive path A of the first embodiment has a flexible sheet material 10, a plurality of transmission lines 20 and 30 arranged side by side on the sheet material 10, and a noise shielding member provided on the sheet material 10. 40 and. The plurality of transmission lines 20 and 30 include a first transmission line 20 that requires noise shielding and a second transmission line 30 that does not require noise shielding. The noise shielding member 40 is arranged so as to be along only the first transmission line 20 of the plurality of transmission lines 20 and 30 and to cover only the first transmission line 20 of the plurality of transmission lines 20 and 30. Since the noise shielding member 40 is arranged only along the first transmission line 20 that requires noise countermeasures among the plurality of transmission lines 20 and 30, the noise shielding member 40 is provided along all the transmission lines 20 and 30. The material cost of the noise shielding member 40 can be reduced as compared with the case where the noise shielding member 40 is provided.
　ノイズ遮蔽部材４０を構成する磁性体層４１は、磁性材を含んだシート状をなしていることが好ましい。第１伝送路２０から発する電磁ノイズは、磁性材の磁気損失によって吸収される。これにより、高いノイズ遮蔽効果を得ることができる。一対のノイズ遮蔽部材４０は、第１伝送路２０を挟むように配置され、第１伝送路２０の配索方向と直交する方向に対向している。１つのノイズ遮蔽部材４０だけで第１伝送路２０のノイズ対策を講じる場合に比べると、一対のノイズ遮蔽部材４０で第１伝送路２０を挟む形態の方が、高いノイズ遮蔽効果を得ることができる。 The magnetic material layer 41 constituting the noise shielding member 40 is preferably in the form of a sheet containing a magnetic material. The electromagnetic noise generated from the first transmission line 20 is absorbed by the magnetic loss of the magnetic material. Thereby, a high noise shielding effect can be obtained. The pair of noise shielding members 40 are arranged so as to sandwich the first transmission line 20, and face each other in a direction orthogonal to the wiring direction of the first transmission line 20. Compared with the case where the noise countermeasure of the first transmission line 20 is taken only by one noise shielding member 40, the form in which the first transmission line 20 is sandwiched between the pair of noise shielding members 40 can obtain a higher noise shielding effect. can.
　ノイズ遮蔽部材４０は、第１伝送路２０の全長のうち一部のみに沿い、かつ第１伝送路２０の全長のうち一部のみを覆うように配置されている。ノイズ遮蔽部材４０を構成する磁性体層４１は、第１伝送路２０の配索方向に沿って細長く延びている。磁性体層４１の長さ寸法は、５００ｍｍ以上である。この構成によれば、ノイズ遮蔽効果を低下させることなく、ノイズ遮蔽部材４０の材料コストを低減することができる。また、ノイズ遮蔽部材４０の長さが５００ｍｍ未満である場合に比べると、高いノイズ遮蔽効果を得ることができる。 The noise shielding member 40 is arranged so as to cover only a part of the total length of the first transmission line 20 and cover only a part of the total length of the first transmission line 20. The magnetic material layer 41 constituting the noise shielding member 40 is elongated along the wiring direction of the first transmission line 20. The length dimension of the magnetic material layer 41 is 500 mm or more. According to this configuration, the material cost of the noise shielding member 40 can be reduced without reducing the noise shielding effect. Further, a higher noise shielding effect can be obtained as compared with the case where the length of the noise shielding member 40 is less than 500 mm.
　第１伝送路２０の端部には、電気回路４６が接続されるようになっている。ノイズ遮蔽部材４０は、第１伝送路２０の端部の近傍領域のみに配置されている。この構成によれば、電気回路４６で発生した電磁ノイズが、第１伝送路２０の端部において電気回路４６側へ反射する。したがって、ノイズ遮蔽部材４０が第１伝送路２０の長さ方向における中央部に配置されている場合に比べると、電気回路４６で発生した電磁ノイズの影響が第１伝送路２０に及び難い。 An electric circuit 46 is connected to the end of the first transmission line 20. The noise shielding member 40 is arranged only in a region near the end of the first transmission line 20. According to this configuration, the electromagnetic noise generated in the electric circuit 46 is reflected toward the electric circuit 46 side at the end of the first transmission line 20. Therefore, as compared with the case where the noise shielding member 40 is arranged at the central portion in the length direction of the first transmission line 20, the influence of the electromagnetic noise generated in the electric circuit 46 is less likely to reach the first transmission line 20.
　ノイズ遮蔽部材４０の磁性体層４１はシート状をなしている。磁性体層４１の厚さ寸法は、２００μｍ～４００μｍであるから、高いノイズ遮蔽効果を得ることができる。ノイズ遮蔽部材４０の磁性体層４１は一定幅のシート状をなしている。磁性体層４１の幅寸法は、１５ｍｍ以上であるから、高いノイズ遮蔽効果を得ることができる。 The magnetic material layer 41 of the noise shielding member 40 has a sheet shape. Since the thickness dimension of the magnetic material layer 41 is 200 μm to 400 μm, a high noise shielding effect can be obtained. The magnetic material layer 41 of the noise shielding member 40 is in the form of a sheet having a constant width. Since the width dimension of the magnetic material layer 41 is 15 mm or more, a high noise shielding effect can be obtained.
　［他の実施例］
　本発明は、上記記述及び図面によって説明した実施例に限定されるものではなく、特許請求の範囲によって示される。本発明には、特許請求の範囲と均等の意味及び特許請求の範囲内でのすべての変更が含まれ、下記のような実施形態も含まれることが意図される。
　上記実施例では、第１伝送路が同軸ケーブルであるが、第１伝送路はツイストペア線でもよい。
　上記実施例では、ノイズ遮蔽部材が一定幅のシート状をなしているが、ノイズ遮蔽部材は線状をなしていてもよい。
　上記実施例では、第１伝送路のシースの材料がＰＣＶ（ポリ塩化ビニル）であるが、シースの材料はＰＶＣ以外のものであってもよい。
　上記実施例では、ノイズ遮蔽部材の溶着層の材料がＰＣＶ（ポリ塩化ビニル）であるが、溶着層の材料はＰＶＣ以外のものであってもよい。 [Other Examples]
The present invention is not limited to the examples described in the above description and drawings, but is shown by the scope of claims. The present invention includes the meaning equivalent to the scope of claims and all modifications within the scope of claims, and is intended to include the following embodiments.
In the above embodiment, the first transmission line is a coaxial cable, but the first transmission line may be a twisted pair line.
In the above embodiment, the noise shielding member has a fixed width sheet shape, but the noise shielding member may have a linear shape.
In the above embodiment, the material of the sheath of the first transmission line is PCV (polyvinyl chloride), but the material of the sheath may be other than PVC.
In the above embodiment, the material of the welding layer of the noise shielding member is PCV (polyvinyl chloride), but the material of the welding layer may be other than PVC.
Ａ…シート状導電路
Ｓ…シングルシールド導電路
Ｗ…ダブルシールド導電路
１０　…シート材
１１…幹線用配線部
１２…支線用配線部
２０…第１伝送路
２１…幹線部
２２…支線部
２４…導体
２５…絶縁体
２６…シールド層
２７…シース
３０…第２伝送路
３１…芯線
３２…絶縁被覆
４０…ノイズ遮蔽部材
４１…磁性体層
４２…溶着層
４３…保護層
４５…コネクタ
４６…電気回路 A ... Sheet-shaped conductive path S ... Single-shielded conductive path W ... Double-shielded conductive path 10 ... Sheet material 11 ... Trunk line wiring section 12 ... Branch line wiring section 20 ... First transmission line 21 ... Trunk line section 22 ... Branch line section 24 ... Conductor 25 ... Insulator 26 ... Shield layer 27 ... Sheath 30 ... Second transmission line 31 ... Core wire 32 ... Insulation coating 40 ... Noise shielding member 41 ... Magnetic material layer 42 ... Welding layer 43 ... Protective layer 45 ... Connector 46 ... Electric circuit

Claims (8)

  1. 　可撓性を有するシート材と、
    　前記シート材に並べて配索された複数の伝送路と、
    　前記シート材に設けられたノイズ遮蔽部材とを備え、
    　前記複数の伝送路は、ノイズ遮蔽が必要な第１伝送路と、ノイズ遮蔽が不要な第２伝送路とを含み、
    　前記ノイズ遮蔽部材は、前記複数の伝送路のうち前記第１伝送路のみに沿うように配置されているシート状導電路。     Flexible sheet material and
    A plurality of transmission lines arranged side by side on the sheet material and
    A noise shielding member provided on the sheet material is provided, and the sheet material is provided with a noise shielding member.
    The plurality of transmission lines include a first transmission line that requires noise shielding and a second transmission line that does not require noise shielding.
    The noise shielding member is a sheet-shaped conductive path arranged along only the first transmission line among the plurality of transmission lines.
  2. 　前記ノイズ遮蔽部材は、磁性材を含んだシート状をなしている請求項１に記載のシート状導電路。 The sheet-shaped conductive path according to claim 1, wherein the noise shielding member is in the form of a sheet containing a magnetic material.
  3. 　一対の前記ノイズ遮蔽部材が、前記第１伝送路を挟んで対向するように配置されている請求項１又は請求項２に記載のシート状導電路。 The sheet-shaped conductive path according to claim 1 or 2, wherein the pair of noise shielding members are arranged so as to face each other with the first transmission path interposed therebetween.
  4. 　前記ノイズ遮蔽部材は、前記第１伝送路の全長のうち一部のみに沿うように配置されている請求項１から請求項３のいずれか１項に記載のシート状導電路。 The sheet-shaped conductive path according to any one of claims 1 to 3, wherein the noise shielding member is arranged along only a part of the total length of the first transmission line.
  5. 　前記第１伝送路の配索方向における前記ノイズ遮蔽部材の長さ寸法は、５００ｍｍ以上である請求項４に記載のシート状導電路。 The sheet-shaped conductive path according to claim 4, wherein the length dimension of the noise shielding member in the wiring direction of the first transmission line is 500 mm or more.
  6. 　前記第１伝送路の端部には、電気回路が接続されるようになっており、
    　前記ノイズ遮蔽部材は、前記第１伝送路の端部の近傍領域のみに配置されている請求項４又は請求項５に記載のシート状導電路。     An electric circuit is connected to the end of the first transmission line.
    The sheet-shaped conductive path according to claim 4 or 5, wherein the noise shielding member is arranged only in a region near the end of the first transmission line.
  7. 　前記ノイズ遮蔽部材はシート状をなしており、
    　前記ノイズ遮蔽部材の厚さ寸法は、２００μｍ～４００μｍである請求項１から請求項６のいずれか１項に記載のシート状導電路。     The noise shielding member has a sheet shape and has a sheet shape.
    The sheet-shaped conductive path according to any one of claims 1 to 6, wherein the noise shielding member has a thickness dimension of 200 μm to 400 μm.
  8. 　前記ノイズ遮蔽部材は一定幅のシート状をなしており、
    　前記ノイズ遮蔽部材の幅寸法は、１５ｍｍ以上である請求項１から請求項７のいずれか１項に記載のシート状導電路。     The noise shielding member is in the form of a sheet having a constant width.
    The sheet-shaped conductive path according to any one of claims 1 to 7, wherein the width dimension of the noise shielding member is 15 mm or more.
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