Composite cable

Abstract

To provide a composite cable hard to generate buckling of an insulated wire.SOLUTION: A composite cable 2 includes an ABS cable 3, an ADS cable 4, and an EPB cable 5, and an external sheath 7 which covers the ABS cable 3, the ADS cable 4, and the EPB cable 5 together. The ABS cable 3 has first and second insulated wires 31, 32, and an internal sheath 33 which covers the first and second insulated wires 31, 32. The ADS cable 4 has third and fourth insulated wires 41, 42. The third and fourth insulated wires 41, 42 have higher flexure rigidities than the first and second insulated wires 31, 32.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a composite cable in which a plurality of electric wires are collectively covered with an outer sheath. [Background technology]

[0002] BACKGROUND ART Conventionally, composite cables in which a plurality of electric wires are collectively covered with an outer sheath include those connected between the unsprung and sprung parts of a vehicle (see, for example, Patent Document 1).

[0003] Patent Document 1 describes a wire harness including an ABS cable formed by two insulated wires, each having a conductor covered with an insulator, covered with an inner sheath; an ADS cable formed by two insulated wires, each having a conductor covered with an insulator, twisted together; and an EPB cable formed by two insulated wires, each having a conductor covered with an insulator, twisted together; and an outer sheath that collectively covers these multiple cables. The ABS cable is connected to an ABS sensor that detects the rotation speed of the wheels, and the ADS cable is connected to a variable damping force damper that can adjust the damping force. The EPB cable is connected to an electric parking brake device and supplies power to the electric parking brake device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-139571 Summary of the Invention [Problem to be solved by the invention]

[0005] As described in Patent Document 1, a cable connected between the unsprung and sprung parts of a vehicle is repeatedly bent by the up and down movement of the wheels relative to the vehicle body. Depending on the curvature and frequency of the bending, the insulated wires of an ADS cable, which is not covered with an inner sheath and is thinner than an EPB cable, may buckle, causing bending stress to concentrate at the buckled part. This stress concentration reduces bending durability. Here, buckling refers to local bending in a portion of the longitudinal direction. Therefore, an object of the present invention is to provide a composite cable in which buckling of the insulated wires is less likely to occur. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a composite cable comprising: a plurality of insulated electric wires each having a conductor wire made of a conductive metal covered with an insulator made of a resin; an inner sheath covering some of the plurality of insulated electric wires; and an outer sheath covering the plurality of insulated electric wires and the inner sheath collectively, wherein at least one of the plurality of insulated electric wires that is not covered with the inner sheath has a bending rigidity higher than the bending rigidity of the some of the insulated electric wires that are covered with the inner sheath. [Effects of the Invention]

[0007] According to the composite cable of the present invention, buckling of the insulated wires is less likely to occur, and bending durability is improved. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing the configuration of a composite cable according to an embodiment of the present invention, and the configuration of a wheel side and a vehicle body side connected by the composite cable. [Figure 2] FIG. 2 is a cross-sectional view of the composite cable taken along line AA in FIG. [Figure 3] FIG. 2 is an explanatory diagram showing the ends of the first and second insulated wires with the inner sheath of the ABS cable omitted. [Figure 4] FIG. 2 is an explanatory diagram showing the end of an ADS cable. [Figure 5] FIG. 2 is an explanatory diagram showing an end of an EPB cable. [Figure 6] FIG. 10 is a cross-sectional view showing a composite cable according to a first modification. [Figure 7] FIG. 10 is a cross-sectional view showing a composite cable according to a second modification. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment Mode] Fig. 1 is a schematic diagram showing the configuration of a composite cable 2 according to an embodiment of the present invention, and the configuration of the wheel side and the vehicle body side connected by the composite cable 2. Fig. 2 is a cross-sectional view of the composite cable 2 taken along line AA in Fig. 1.

[0010] FIG. 1 shows one wheel 100 of a vehicle's multiple wheels, a hub unit 10 that supports the wheel so that it can rotate, a knuckle 11 to which the hub unit 10 is attached, a variable damping force damper 12 and a lower arm 13 connected to the knuckle 11, a suspension spring 14 arranged on the outer periphery of the variable damping force damper 12, an electric parking brake device 15, and a wheel speed sensor 16.

[0011] The hub unit 10 has a hub wheel 101 to which a wheel 100 is fixed, an outer ring 102 fixed to a knuckle 11, and rolling elements 103 arranged in double rows between the hub wheel 101 and the outer ring 102. The variable damping force damper 12 is a damper that can electrically adjust damping force according to the current supplied. The electric parking brake device 15 is fixed to the knuckle 11 and locks the wheel 100 to prevent it from rotating when the vehicle is stopped. The wheel speed sensor 16 detects the rotational speed of the hub wheel 101 relative to the outer ring 102 as the rotational speed of the wheel 100.

[0012] The composite cable 2 is routed between the unsprung section, which is the section that moves up and down relative to the vehicle body as the suspension spring 14 expands and contracts, and the sprung section, which does not move up and down relative to the vehicle body, and is repeatedly bent as the wheels 100 move up and down relative to the vehicle body when the vehicle is running. The variable damping force damper 12, the electric parking brake device 15, and the wheel speed sensor 16 are arranged in the unsprung section.

[0013] As shown in Fig. 2, the composite cable 2 has a cable core 20 in which an ABS (Antilock brake system) cable 3, an ADS (Active damper suspension) cable 4, and an EPB (Electric parking brake) cable 5 are twisted together, a bind tape 6 wound spirally around the outer periphery of the cable core 20, and an outer sheath 7 provided around the outer periphery of the bind tape 6. A shielding layer may be provided between the bind tape 6 and the outer sheath 7. One end of each of the ABS cable 3, the ADS cable 4, and the EPB cable 5 is connected to the unsprung mass and the other end is connected to the sprung mass.

[0014] 1, the outline of the outer sheath 7 is shown by a two-dot chain line in a portion of the longitudinal direction of the composite cable 2, and the bind tape 6 and the cable core 20 inside the outer sheath 7 are shown. The ABS-ECU 17, ADS-ECU 18, and EPB-ECU 19 shown in FIG. 1 are control units (ECUs: Electronic Control Units) arranged on the springs on the vehicle body side.

[0015] A wheel-side ABS connector 301 and a vehicle-body-side ABS connector 302 are attached to one end and the other end of the ABS cable 3, respectively. The wheel-side ABS connector 301 is connected to the wheel speed sensor 16, and the vehicle-body-side ABS connector 302 is connected to the ABS-ECU 17. The ABS cable 3 transmits the detection signal of the wheel speed sensor 16 to the ABS-ECU 17.

[0016] A wheel-side ADS connector 401 and a vehicle-body-side ADS connector 402 are attached to one end and the other end of the ADS cable 4, respectively. The wheel-side ADS connector 401 is connected to the variable damping force damper 12, and the vehicle-body-side ADS connector 402 is connected to the ADS-ECU 18. The variable damping force damper 12 damps the expansion and contraction vibration of the suspension spring 14 with a damping force that corresponds to the current supplied from the ADS-ECU 18 via the ADS cable 4.

[0017] A wheel-side EPB connector 501 and a vehicle-body-side EPB connector 502 are attached to one end and the other end of the EPB cable 5, respectively. The wheel-side EPB connector 501 is connected to the electric parking brake device 15, and the vehicle-body-side EPB connector 502 is connected to the EPB-ECU 19. The EPB cable 5 is a power line that supplies operating power to the electric parking brake device 15.

[0018] The composite cable 2, together with the wheel-side ABS connector 301 and the vehicle-body-side ABS connector 302, the wheel-side ADS connector 401 and the vehicle-body-side ADS connector 402, and the wheel-side EPB connector 501 and the vehicle-body-side EPB connector 502, constitutes a wire harness 200. The lengths of the ABS cable 3, the ADS cable 4, and the EPB cable 5 exposed from the outer sheath 7 vary depending on the positions of their respective connection targets. The ABS cable 3, the ADS cable 4, and the EPB cable 5 may also be connected to the ABS-ECU 17, the ADS-ECU 18, and the EPB-ECU 19, respectively, via relay cables.

[0019] The ABS cable 3 has first and second insulated wires 31, 32 and an inner sheath 33 covering the first and second insulated wires 31, 32. The ADS cable 4 has third and fourth insulated wires 41, 42. The EPB cable 5 has fifth and sixth insulated wires 51, 52. That is, the composite cable 2 has first to sixth insulated wires 31, 32, 41, 42, 51, 52, the inner sheath 33 covering the first and second insulated wires 31, 32 which are part of the first to sixth insulated wires 31, 32, 41, 42, 51, 52, the bind tape 6, and the outer sheath 7 covering all of these.

[0020] The first and second insulated wires 31, 32 of the ABS cable 3, the third and fourth insulated wires 41, 42 of the ADS cable 4, and the fifth and sixth insulated wires 51, 52 of the EPB cable 5 are twisted together. The bind tape 6 is made of a nonwoven fabric made of, for example, polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber. The inner sheath 33 and the outer sheath 7 are made of, for example, thermoplastic urethane, which has excellent flexibility and durability.

[0021] 3 is an explanatory diagram showing the ends of the first and second insulated wires 31, 32 of the ABS cable 3, omitting the inner sheath 33. The first and second insulated wires 31, 32 have conductor wires 311, 321 made of conductive metal and insulators 312, 322 made of insulating resin covering the conductor wires 311, 321, respectively, and are twisted together in a spiral shape inside the inner sheath 33. The conductor wires 311, 321 are bunched strands formed by twisting together a plurality of metal strands 311a, 321a in the same direction. The first and second insulated wires 31, 32 correspond to "a portion of the insulated wire covered by the inner sheath" in this invention.

[0022] FIG. 4 is an explanatory diagram showing the ends of the ADS cable 4. The third and fourth insulated wires 41, 42 each have a conductor wire 411, 421 made of a conductive metal and an insulator 412, 422 made of an insulating resin covering the conductor wires 411, 421. The conductor wires 411, 421 are composite stranded wires formed by further stranding a plurality of sub-stranded wires 411b, 421b obtained by stranding a plurality of metal strands 411a, 421a. In the example shown in FIG. 4, the conductor wires 411, 421 are formed by parent-stranding seven sub-stranded wires 411b, 421b, but the number of sub-stranded wires 411b, 421b to be parent-stranded is not particularly limited. The third and fourth insulated wires 41, 42 correspond to "at least one insulated wire not covered by the inner sheath" in the present invention.

[0023] FIG. 5 is an explanatory diagram showing the ends of the EPB cable 5. The fifth and sixth insulated wires 51, 52 each have a conductor wire 511, 521 made of a conductive metal and an insulator 512, 522 made of an insulating resin covering the conductor wires 511, 521. The conductor wires 511, 521 are collective stranded wires formed by stranding a plurality of metal strands 511a, 521a together in the same direction.

[0024] In FIG. 2, the conductor wire diameters of the first and second insulated wires 31, 32 of the ABS cable 3, the conductor wire diameters of the third and fourth insulated wires 41, 42 of the ADS cable 4, and the conductor wire diameters of the fifth and sixth insulated wires 51, 52 of the EPB cable 5 are indicated by D3, D4, D5, respectively. The respective conductor wire diameters D3, D4, D5 are in the relationship of D3 < D4 < D5, and D5 is at least twice D3.

[0025] When the composite cable 2 configured as described above is bent during the running of the vehicle, in the third and fourth insulated wires 41, 42 of the ADS cable 4 that are not covered by the inner sheath 33 and have a smaller conductor wire diameter than the fifth and sixth insulated wires 51, 52 of the EPB cable 5, buckling is more likely to occur than in the first and second insulated wires 31, 32 of the ABS cable 3 and the fifth and sixth insulated wires 51, 52 of the EPB cable 5.

[0026] For this reason, in the present embodiment, the bending rigidity of the third and fourth insulated wires 41, 42 is made higher than the bending rigidity of the first and second insulated wires 31, 32, thereby preventing buckling of the third and fourth insulated wires 41, 42. Specifically, the buckling of the third and fourth insulated wires 41, 42 is prevented by the following first to fourth means. However, as long as the buckling of the third and fourth insulated wires 41, 42 can be prevented by any one of the first to fourth means, other means may not be used.

[0027] The first means is to use a metal material that is harder and has higher bending rigidity than the metal material of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 as the metal material of the conductor wires 411, 421 of the first and second insulated wires 31, 32. For example, by making the ratio of an additive element (for example, tin) to the main component copper different between the metal material of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 and the metal material of the conductor wires 311, 321 of the first and second insulated wires 31, 32, the rigidity of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 can be made higher than the rigidity of the conductor wires 311, 321 of the first and second insulated wires 31, 32. Alternatively, the metal wires 311a and 321a of the first and second insulated wires 31 and 32 may be made of annealed copper wires, and the metal wires 411a and 421a of the third and fourth insulated wires 41 and 42 may be made of hardened copper wires.

[0028] The second measure is to use a resin material for the insulators 412, 422 of the third and fourth insulated wires 41, 42 that is harder and has higher bending rigidity than the resin for the insulators 312, 322 of the first and second insulated wires 31, 32. For example, by using low-density polyethylene as the resin material for the insulators 312, 322 of the first and second insulated wires 31, 32 and high-density polyethylene as the resin material for the insulators 412, 422 of the third and fourth insulated wires 41, 42, the rigidity of the third and fourth insulated wires 41, 42 can be made higher than the rigidity of the first and second insulated wires 31, 32. Alternatively, PBT (Polybutylene terephthalate) or ETFE (Ethylene tetrafluoroethylene), which is a copolymer of tetrafluoroethylene and ethylene, may be used as the resin material for the insulators 412, 422 of the third and fourth insulated wires 41, 42. Furthermore, by making the thicknesses of the insulators 412, 422 of the third and fourth insulated wires 41, 42 thicker than the insulators 312, 322 of the first and second insulated wires 31, 32, the bending rigidity of the third and fourth insulated wires 41, 42 can be made higher than that of the first and second insulated wires 31, 32.

[0029] The third measure is to make the conductor wire diameter D4 of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 thicker than the conductor wire diameter D3 of the conductor wires 311, 321 of the first and second insulated wires 31, 32. The conductor wire diameter D4 of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 is, for example, 1.2 to 2.0 times the conductor wire diameter D3 of the conductor wires 311, 321 of the first and second insulated wires 31, 32.

[0030] The fourth means is to form the conductor wires 311, 321 of the first and second insulated wires 31, 32 as bunched stranded wires and the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 as concentric stranded wires. By forming the conductor wires 411, 421 of the third and fourth insulated wires 41, 42 as concentric stranded wires, the conductor wires 411, 421 are less likely to be crushed in the bending direction even when the third and fourth insulated wires 41, 42 are bent, and the bending rigidity of the third and fourth insulated wires 41, 42 can be made higher than that of the first and second insulated wires 31, 32.

[0031] The materials of the conductor wires 511, 521 and the insulators 512, 522 of the fifth and sixth insulated wires 51, 52 may be the same as the materials of the conductor wires 311, 321 and the insulators 312, 322 of the first and second insulated wires 31, 32, for example.

[0032] (Effects of the embodiment) According to the embodiment described above, it is possible to suppress buckling in the third and fourth insulated wires 41 and 42, which are relatively prone to buckling among the first to sixth insulated wires 31, 32, 41, 42, 51, and 52, and it is possible to improve the bending durability of the composite cable 2.

[0033] [Variation 1] FIG. 6 is a cross-sectional view of a composite cable 2A according to Modification 1. In the above-described embodiment, the third and fourth insulated wires 41, 42 of the ADS cable 4 are twisted together. However, in Modification 1 shown in FIG. 6 , an ABS cable 3 is disposed between the third insulated wire 41 and the fourth insulated wire 42 of the ADS cable 4, and the third insulated wire 41 and the fourth insulated wire 42 are twisted together with the ABS cable 3 and the EPB cable 5 in a spiral shape to form a cable core 20A. Other configurations and materials of components are similar to those of the above-described embodiment. Similar to the above-described embodiment, Modification 1 can also suppress buckling in the third insulated wire 41 and the fourth insulated wire 42, thereby improving the bending durability of the composite cable 2A. Furthermore, Modification 1 allows the cable core 20A to have a smaller diameter than the above-described embodiment, thereby enabling the composite cable 2A to have a smaller diameter.

[0034] [Variation 2] 7(a) and 7(b) are cross-sectional views showing third and fourth insulated wires 41, 42 according to Modification 2. In the above embodiment, the third and fourth insulated wires 41, 42 of the ADS cable 4 are described as concentric stranded wires. However, in Modification 2 shown in Fig. 7, high-rigidity wires 410, 420 having high bending rigidity are disposed at the center of the conductor wires 411, 421 of the third and fourth insulated wires 41, 42, respectively, and multiple metal wires 411a, 421a are spirally disposed around the high-rigidity wires 410, 420, thereby increasing the bending rigidity of the third and fourth insulated wires 41, 42. The high-rigidity wires 410, 420 may be made of a metal that is thicker and harder than the metal wires 411a, 421a, for example. The materials of the metal wires 411a, 421a and the insulators 412, 422 may be the same as those of the metal wires 311a, 321a and the insulators 312, 322 of the conductor wires 311, 321 of the first and second insulated wires 31, 32. Similar to the above embodiment, this modification 2 also makes it possible to suppress buckling in the third and fourth insulated wires 41, 42.

[0035] (Summary of embodiments and modifications) Next, the technical ideas grasped from the above-described embodiment and modified examples will be described using the reference numerals in the embodiment and modified examples. However, the reference numerals in the following description do not limit the components in the claims to the members, etc. specifically shown in the embodiment and modified examples.

[0036] [1] A plurality of insulated electric wires (31, 32, 41, 42, 51, 52) each formed by covering a conductor wire (311, 321, 411, 421, 511, 521) made of conductive metal with an insulator (312, 322, 412, 422, 512, 522) made of resin, an inner sheath (33) covering some of the insulated electric wires (31, 32) among the plurality of insulated electric wires (31, 32, 41, 42, 51, 52), and the plurality of insulated electric wires (3 a composite cable (2, 2A) including an outer sheath (7) collectively covering the insulated electric wires (31, 32, 41, 42, 51, 52) and the inner sheath (33), wherein the bending rigidity of at least one insulated electric wire (41, 42) among the plurality of insulated electric wires (31, 32, 41, 42, 51, 52) that is not covered with the inner sheath (33) is higher than the bending rigidity of some of the insulated electric wires (31, 32) that are covered with the inner sheath (33).

[0037] [2] The composite cable (2, 2A) described in [1] above, wherein the conductor wire (411, 421) of at least one insulated electric wire (41, 42) that is not covered with the inner sheath (33) is made of a metal that is harder and has higher bending rigidity than the metal of the conductor wire (311, 321) of some of the insulated electric wires (31, 32) that are covered with the inner sheath (33).

[0038] [3] The composite cable (2, 2A) described in [1] above, wherein the insulator (412, 422) of at least one insulated electric wire (41, 42) that is not covered with the inner sheath (33) is made of a resin having a higher bending rigidity than the resin of the insulator (312, 322) of some of the insulated electric wires (31, 32) that are covered with the inner sheath (33).

[0039] [4] The composite cable (2, 2A) according to the above [1], wherein the conductor wires (311, 321) of some of the insulated electric wires (31, 32) covered with the inner sheath (33) are bunched strands formed by twisting together a plurality of metal wires (311a, 321a) in the same direction, and the conductor wires (411, 421) of at least one insulated electric wire (41, 42) not covered with the inner sheath (33) are concentric strands formed by further twisting together child strands (411b, 421b) formed by twisting together a plurality of metal wires (411a, 421a).

[0040] [5] The composite cable (2, 2A) described in [1] above, wherein the conductor wire diameter (D4) of at least one insulated electric wire (41, 42) not covered by the inner sheath (33) is larger than the conductor wire diameter (D3) of some of the insulated electric wires (31, 32) covered by the inner sheath (33).

[0041] [6] The composite cable (2, 2A) according to any one of [1] to [5] above, wherein one end of each of the plurality of insulated electric wires (31, 32, 41, 42, 51, 52) is connected to the unsprung part of the vehicle and the other end is connected to the sprung part.

[0042] [7] The composite cable (2, 2A) described in [6] above, wherein one end of the insulated electric wires (31, 32) covered by the inner sheath (33) is connected to a wheel speed sensor (16) that detects the rotation speed of the wheel (10).

[0043] [8] The composite cable (2, 2A) described in [6] above, wherein at least one insulated electric wire (41, 42) not covered by the inner sheath (33) is connected at one end to a variable damping force damper (12) capable of adjusting the damping force.

[0044] [9] The composite cable (2, 2A) described in [6] above, wherein the plurality of insulated electric wires (31, 32, 41, 42, 51, 52) include power supply wires (51, 52) that supply operating power to an electric parking brake device (15) arranged in the unsprung part of the vehicle.

[0045] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above embodiments. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to solving the problems of the invention. Furthermore, in the above embodiments, the composite cable 2 is routed between the unsprung and sprung parts of a vehicle. However, the use of the composite cable of the present invention is not limited to this, and it can also be used in applications other than vehicles, such as industrial machinery.

[0046] Furthermore, in the above embodiment, the first and second insulated wires 31, 32 transmit the detection signal of the wheel speed sensor 16, and the third and fourth insulated wires 41, 42 supply current to the variable damping force damper 12. However, the uses of the first and second insulated wires 31, 32 and the third and fourth insulated wires 41, 42 are not limited to this. For example, the third and fourth insulated wires 41, 42 may transmit signals related to the control of the electric parking brake device 15 or signals related to the control of an electric brake device that brakes the wheels 100 while the vehicle is traveling.

[0047] Furthermore, in the above embodiment, a case has been described in which the rigidity of the two insulated wires 41, 42 of the ADS cable 4 that are not covered with an inner sheath is made higher than the rigidity of the two insulated wires 31, 32 of the ABS cable 3 that are covered with the inner sheath 33. However, the insulated wire to which the above-mentioned first to fourth means for suppressing buckling by making the rigidity higher than that of the insulated wires 31, 32 of the ABS cable 3 can be applied need only be at least one. [Explanation of symbols]

[0048] 100...Wheel 12...Variable damping force damper 15...Electric parking brake device 16...Wheel speed sensor 2,2A...Composite cable 3...ABS cable 31, 32... First and second insulated wires 311, 321... Conductor wires 311a, 321a... Metal wire 312, 322... Insulator 33...Inner sheath 4...ADS cable 41, 42...Third and fourth insulated wires 411, 421...Conductor wires 411a,421a...metal wire 411b,421b...child twisted wire 412, 422...Insulator 5...EPB cable 51, 52... 5th and 6th insulated wires 511, 521... conductor wires 511a, 521a... Metal wire 512, 522... Insulator 7...Outer sheath D3, D4...Conductor wire diameter

Claims

1. The insulated electric wire includes a plurality of insulated electric wires each formed by covering a conductor wire made of a conductive metal with an insulator made of a resin, an inner sheath that covers some of the insulated electric wires, and an outer sheath that collectively covers the plurality of insulated electric wires and the inner sheath, At least one of the plurality of insulated electric wires that is not covered with the inner sheath has a bending rigidity higher than the bending rigidity of the part of the insulated electric wires that is covered with the inner sheath. Composite cable.

2. the conductor wire of at least one of the insulated electric wires that is not covered with the inner sheath is made of a metal that is harder and has higher bending rigidity than the metal of the conductor wire of the part of the insulated electric wires that is covered with the inner sheath, The composite cable of claim 1 .

3. the insulator of at least one insulated electric wire that is not covered with the inner sheath is made of a resin having a bending rigidity higher than that of the resin of the insulator of the part of the insulated electric wires that are covered with the inner sheath, The composite cable of claim 1 .

4. the conductor wire of the part of the insulated electric wires covered with the inner sheath is a bunched stranded wire in which a plurality of metal wires are bundled and twisted together in the same direction, The conductor wire of at least one insulated electric wire that is not covered with the inner sheath is a concentric stranded wire obtained by further stranding a plurality of child strands each made of a plurality of metal wires. The composite cable of claim 1 .

5. a conductor wire diameter of at least one insulated electric wire not covered with the inner sheath is larger than a conductor wire diameter of some of the insulated electric wires covered with the inner sheath; The composite cable of claim 1 .

6. One end of each of the plurality of insulated electric wires is connected to an unsprung part of the vehicle and the other end is connected to a sprung part. The composite cable according to any one of claims 1 to 5.

7. One end of the part of the insulated electric wires covered with the inner sheath is connected to a wheel speed sensor that detects the rotation speed of a wheel. The composite cable according to claim 6.

8. The at least one insulated electric wire that is not covered with the inner sheath has one end connected to a variable damping force damper that can adjust the damping force. The composite cable according to claim 6.

9. The plurality of insulated electric wires include an electric parking brake device disposed in an unsprung portion of the vehicle or a power supply line for supplying operating power to the electric brake device. The composite cable according to claim 6.

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