Wire Harness

Abstract

To suppress rattling of electric wires even when the number of electric wires housed in a protective member is small.SOLUTION: A wiring harness W includes a cylindrical first electric wire 10 configured as a hollow electric wire, and a protection member 40 that accommodates the first electric wire 10. The first electric wire 10 includes a hollow portion 11 capable of accommodating a second electric wire 20. According to this configuration, even when the second electric wire 20 is not accommodated in the hollow portion 11, the clearance between the outer peripheral surface of the first electric wire 10 and the inner peripheral surface of the protective member 40 does not change. Therefore, rattling of the first electric wire 10 is suppressed. Therefore, according to this configuration, even when the number of electric wires accommodated in the protective member 40 is small, it is possible to suppress rattling of the electric wires.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a wire harness. [Background technology]

[0002] Patent Document 1 discloses a wire harness. This wire harness includes a plurality of electric wires and a protective member (electric wire protection pipe) that protects the plurality of electric wires. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-83603 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of wire harness, when the protective member is to be made common to a plurality of vehicle models, the following problem occurs. That is, the number of electric wires arranged in the protective member may differ depending on the vehicle model. Therefore, if the protective member is formed for a vehicle model with a large number of electric wires, the electric wires will rattle in the protective member when the protective member is mounted on a vehicle model with a small number of electric wires.

[0005] Therefore, the present disclosure provides a technique that can suppress rattling of electric wires even when the number of electric wires housed in a protective member is small. [Means for solving the problem]

[0006] The wire harness of the present disclosure includes a tubular first electric wire configured as a hollow electric wire and a protective member that houses the first electric wire, and the first electric wire has a hollow portion capable of housing a second electric wire. Effect of the Invention

[0007] According to the present disclosure, even when the number of electric wires housed in the protective member is small, rattling of the electric wires can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a vehicle in which a wire harness according to a first embodiment is installed. [Diagram 2] FIG. 2 is a cross-sectional view of the wire harness taken along line AA in FIG. [Diagram 3] FIG. 3 is a cross-sectional view of the wire harness in a state where the second electric wire is not housed in the hollow portion. [Figure 4] FIG. 4 is a cross-sectional view of the wire harness of the second embodiment. [Diagram 5] FIG. 5 is a cross-sectional view of the wire harness of the third embodiment. [Figure 6] FIG. 6 is a cross-sectional view of the wire harness of the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.

[0010] The shield member of the present disclosure comprises: (1) A cylindrical first electric wire configured as a hollow electric wire and a protective member that houses the first electric wire, the first electric wire having a hollow portion capable of housing a second electric wire.

[0011] According to this configuration, by accommodating the second electric wire in the hollow portion, it is possible to accommodate multiple electric wires in the protective member. Moreover, even if the second electric wire is not accommodated in the hollow portion, the clearance between the outer peripheral surface of the first electric wire and the inner peripheral surface of the protective member remains unchanged. This prevents the first electric wire from rattling. Therefore, according to this configuration, even if the number of electric wires accommodated in the protective member is small, it is possible to prevent the electric wires from rattling.

[0012] (2) In the configuration of (1) above, it is preferable that the first electric wire has a tubular hollow conductor having the hollow portion and an insulating coating covering an outer periphery of the hollow conductor.

[0013] According to this configuration, the outer peripheral surface of the hollow conductor can be electrically insulated from the outside.

[0014] (3) In the configuration of (1) or (2) above, it is preferable that the first electric wire has a flat portion whose cross-sectional width is greater than its height.

[0015] According to this configuration, it is easy to reduce the height of the wire harness.

[0016] (4) In any one of the configurations (1) to (3) above, it is preferable that an inner peripheral shape of a cross section of the protection member is noncircular, and an outer peripheral shape of a cross section of the first electric wire is noncircular.

[0017] This configuration makes it easier to prevent the first electric wire housed in the protective member from rotating.

[0018] (5) In the configuration of (4) above, it is preferable that both the protective member and the first electric wire have a rectangular tube shape.

[0019] With this configuration, it is easier to prevent the first electric wire housed in the protective member from rotating.

[0020] (6) In any one of the configurations (1) to (5) above, the protective member is preferably a conductive shield pipe.

[0021] According to this configuration, the protective member can have both a function of protecting the first electric wire and a function of electromagnetic shielding.

[0022] (7) In any one of the configurations (1) to (6), the wire harness is preferably capable of being installed in a vehicle equipped with a main battery and a sub-battery. The first electric wire is preferably electrically connected to the main battery, and the second electric wire is preferably electrically connected to the sub-battery.

[0023] According to this configuration, the first electric wire electrically connected to the main battery and the second electric wire electrically connected to the sub-battery can be housed together in the protective member. Furthermore, when the wire harness is installed in a vehicle that does not have a sub-battery, even if the second electric wire is not housed in the hollow portion of the first electric wire, rattling of the first electric wire in the protective member can be suppressed.

[0024] (8) In any one of the configurations (1) to (7) above, it is preferable that the second electric wire has a second hollow portion capable of accommodating a third electric wire.

[0025] According to this configuration, the third electric wire can be housed in the second hollow portion of the second electric wire, and even if the third electric wire is not housed, rattling of the second electric wire can be suppressed.

[0026] In this specification, the term "cross section" refers to a transverse section, that is, a section cut in a direction perpendicular to the extension direction of the wire harness.

[0027] [Details of the embodiment of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0028] <Embodiment 1> FIG. 1 discloses a vehicle 90 in which the wire harness W of the first embodiment is installed. The vehicle 90 is equipped with an in-vehicle device 91, a main battery 92, and a sub-battery 93. The in-vehicle device 91 is disposed at the front side of the vehicle 90, and the main battery 92 and the sub-battery 93 are disposed at the rear side of the vehicle 90. The in-vehicle device 91 is, for example, an electric connection box that stores electric components. The electric connection box may also be called a junction box, a fuse box, a relay box, or the like. The electric connection box of this embodiment is, for example, a relay box equipped with a relay block having a relay component not shown. The main battery 92 and the sub-battery 93 are, for example, secondary batteries such as a lead battery and a lithium ion battery. The wire harness W is electrically connected to the in-vehicle device 91, the main battery 92, and the sub-battery 93. The wire harness W supplies power based on the main battery 92 to the in-vehicle device 91. The wire harness W supplies electric power from the sub-battery 93 to the in-vehicle device 91 when the electric power supply from the main battery 92 is insufficient.

[0029] As shown in FIG. 2, the wire harness W includes a first electric wire 10, a second electric wire 20, and a protective member 40.

[0030] The first electric wire 10 is tubular, more specifically, rectangular, and is configured as a hollow electric wire. The first electric wire 10 has a hollow portion 11 capable of accommodating the second electric wire 20. The first electric wire 10 has a hollow conductor 12 and an insulating coating 13. The hollow conductor 12 is tubular, more specifically, rectangular. The hollow conductor 12 is configured as a bus bar. The hollow conductor 12 has the above-mentioned hollow portion 11. The insulating coating 13 covers the outer periphery of the hollow conductor 12. The insulating coating 13 is tubular, more specifically, rectangular. The insulating coating 13 is bonded to the outer periphery of the hollow conductor 12. The first electric wire 10 has a flat portion 14 whose cross-sectional width is greater than its height. The flat portion 14 is tubular, more specifically, rectangular. The hollow portion 11 is provided inside the flat portion 14.

[0031] The second electric wire 20 is configured as a solid electric wire. The shape of the outer peripheral surface in the cross section of the second electric wire 20 is rectangular. The second electric wire 20 has a central conductor 22 and a second insulating coating 23. The central conductor 22 is a solid conductor extending in a rod shape. The central conductor 22 is configured as a bus bar. The cross section of the central conductor 22 is rectangular. The second insulating coating 23 covers the outer periphery of the central conductor 22. The second insulating coating 23 is tubular, more specifically, rectangular tubular. The second insulating coating 23 is bonded to the outer peripheral surface of the central conductor 22. The second electric wire 20 has a second flat portion 24 whose cross section width is larger than its height. The cross section of the second flat portion 24 is rectangular. The second flat portion 24 is housed in the hollow portion 11 provided inside the flat portion 14. The width dimension of the second flat portion 24 is smaller than the width dimension of the hollow portion 11 provided inside the flat portion 14, and is larger than the height dimension of the hollow portion 11 provided inside the flat portion 14. Therefore, while the second electric wire 20 is housed in the hollow portion 11, its circumferential rotation is restricted.

[0032] The protective member 40 is a member that protects the first electric wire 10 and accommodates the first electric wire 10 therein. The protective member 40 is, for example, conductive and configured as a metal shield pipe. The protective member 40 is tubular, more specifically, rectangular tubular. The protective member 40 has a protective member side hollow portion 41 capable of accommodating the first electric wire 10. The protective member 40 has a protective member side flat portion 44 whose cross-sectional width is greater than its height. The protective member side flat portion 44 is tubular, more specifically, rectangular tubular. The protective member side hollow portion 41 is provided inside the protective member side flat portion 44, and accommodates the flat portion 14 of the first electric wire 10 described above. The width dimension of the flat portion 14 is smaller than the width dimension of the protective member side hollow portion 41 provided inside the protective member side flat portion 44, and is larger than the height dimension of the protective member side hollow portion 41 provided inside the protective member side flat portion 44. Therefore, while the first electric wire 10 is housed in the protection member side hollow portion 41, its rotation in the circumferential direction is restricted.

[0033] One end of the first electric wire 10 is electrically connected to the in-vehicle device 91, and the other end is electrically connected to the main battery 92. One end of the second electric wire 20 is electrically connected to the in-vehicle device 91, and the other end is electrically connected to the sub-battery 93.

[0034] Incidentally, the wire harness W can also be installed in a vehicle that does not have a sub-battery 93. In this case, as shown in FIG. 3, the second electric wire 20 connected to the sub-battery 93 is not housed in the hollow portion 11. However, the clearance between the outer peripheral surface of the first electric wire 10 and the inner peripheral surface of the protective member 40 does not change. Therefore, even if the second electric wire 20 is not housed in the hollow portion 11, rattling of the first electric wire 10 is suppressed. Therefore, according to this wire harness W, rattling of the electric wires can be suppressed even when the number of electric wires housed in the protective member 40 is small.

[0035] Furthermore, the first electric wire 10 has a cylindrical hollow conductor 12 having a hollow portion 11, and an insulating coating 13 covering the outer periphery of the hollow conductor 12. With this configuration, the outer periphery of the hollow conductor 12 can be electrically insulated from the protective member 40.

[0036] Furthermore, the first electric wire 10 has a flat portion 14 whose cross-sectional width is greater than its height. The protective member 40 has a protective member-side flat portion 44 whose cross-sectional width is greater than its height. The flat portion 14 is disposed within the protective member-side flat portion 44. This configuration makes it easy to reduce the height of the wire harness W.

[0037] Furthermore, both the protective member 40 and the first electric wire 10 are in a rectangular tubular shape. With this configuration, the first electric wire 10 housed in the protective member 40 can be more easily prevented from rotating.

[0038] Furthermore, the protective member 40 is a shielded pipe having electrical conductivity. With this configuration, the protective member 40 can have both a function of protecting the first electric wire 10 and a function of electromagnetic shielding.

[0039] <Embodiment 2> In the first embodiment, the second electric wire is a solid electric wire, but may be a hollow electric wire. In the second embodiment, an example in which the second electric wire is a hollow electric wire will be described. In the following description, the same components as those in the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

[0040] As shown in FIG. 4, the wire harness W2 of the second embodiment includes a first electric wire 10, a second electric wire 220, a third electric wire 230, and a protective member 40.

[0041] The second electric wire 220 is tubular, more specifically, rectangular, and is configured as a hollow electric wire. The second electric wire 220 has a second hollow portion 221 capable of accommodating the third electric wire 230. The second electric wire 220 has a second hollow conductor 222 and a second insulating coating 223. The second hollow conductor 222 is tubular, more specifically, rectangular. The second hollow conductor 222 is configured as a bus bar. The second hollow conductor 222 has the above-mentioned second hollow portion 221. The second insulating coating 223 covers the outer periphery of the second hollow conductor 222. The second insulating coating 223 is tubular, more specifically, rectangular. The second insulating coating 223 is bonded to the outer periphery of the second hollow conductor 222. The second electric wire 220 has a second flat portion 224 whose cross-sectional width is greater than its height. The second flat portion 224 is cylindrical, more specifically, rectangular. A second hollow portion 221 is provided inside the second flat portion 224. The second flat portion 224 is housed in a hollow portion 11 provided inside the flat portion 14. The width dimension of the second flat portion 224 is smaller than the width dimension of the hollow portion 11 provided inside the flat portion 14, and is larger than the height dimension of the hollow portion 11 provided inside the flat portion 14. Therefore, the second electric wire 220 is restricted from rotating in the circumferential direction while being housed in the hollow portion 11.

[0042] The third electric wire 230 is configured as a solid electric wire. The shape of the outer peripheral surface in the cross section of the third electric wire 230 is rectangular. The third electric wire 230 has a central conductor 232 and a third insulating coating 233. The central conductor 232 is a solid conductor extending in a rod shape. The central conductor 232 is configured as a bus bar. The cross section of the central conductor 232 is rectangular. The third insulating coating 233 covers the outer periphery of the central conductor 232. The third insulating coating 233 is tubular, more specifically, rectangular tubular. The third insulating coating 233 is bonded to the outer peripheral surface of the central conductor 232. The third electric wire 230 has a third flat portion 234 whose cross-sectional width is greater than its height. The third flat portion 234 is housed in the second hollow portion 221 provided inside the second flat portion 224. The width dimension of the third flat portion 234 is smaller than the width dimension of the second hollow portion 221 provided inside the second flat portion 224, and is larger than the height dimension of the second hollow portion 221 provided inside the second flat portion 224. Therefore, while the third electric wire 230 is housed in the second hollow portion 221, its circumferential rotation is restricted.

[0043] According to this configuration, the third electric wire 230 can be housed in the second hollow portion 221 of the second electric wire 220, and even if the third electric wire 230 is not housed therein, rattling of the second electric wire 220 can be suppressed.

[0044] <Embodiment 3> In the first and second embodiments, the conductor portion of the second electric wire is a bus bar, but it does not have to be a bus bar. Also, in the first and second embodiments, the number of the second electric wire is one, but it may be two or more. In the third embodiment, an example will be described in which a plurality of second electric wires are provided and the conductor portion of the second electric wire is a single-core wire. In the following description, the same reference numerals will be used for the same configuration as in the first embodiment, and detailed description will be omitted.

[0045] 5, the wire harness W3 of the third embodiment includes a first electric wire 10, a second electric wire 320, and a protective member 40. A plurality of (four in this embodiment) second electric wires 320 are housed in the hollow portion 11 of the first electric wire 10.

[0046] The cross-sectional shape of the second electric wire 320 is circular. The second electric wire 320 has a core wire 322 and a second insulating coating 323. The core wire 322 is conductive. The core wire 322 is a cylindrical single-core wire. The second insulating coating 323 covers the outer periphery of the core wire 322. The second insulating coating 323 is cylindrical, more specifically, Cylindrical The second insulating cover 323 is bonded to the outer circumferential surface of the core wire 322.

[0047] <Embodiment 4> In the third embodiment, a plurality of second electric wires of the same type are provided, but different types of second electric wires may be provided. In the fourth embodiment, an example in which different types of second electric wires are provided will be described. In the following description, the same reference numerals are used for the same configurations as in the first embodiment, and detailed description will be omitted.

[0048] 6, the wire harness W4 of the fourth embodiment includes a first electric wire 10, second electric wires 420A and 420B, and a protective member 40. One second electric wire 420A and a plurality of (four in this embodiment) second electric wires 420B are housed in a hollow portion 11 of the first electric wire 10. The second electric wire 420A is a wire having a reduced width and height compared to the second electric wire 20 of the first embodiment. The second electric wire 420B has the same shape as the second electric wire 320 of the third embodiment.

[0049] [Another embodiment of the present disclosure] The embodiments disclosed herein should be considered as illustrative in all respects and not restrictive. (1) In each of the above embodiments, the hollow conductor of the first electric wire is a bus bar, but it does not have to be a bus bar. For example, the hollow conductor may be a cylindrical single-core wire or a twisted wire. In each of the above embodiments, the conductor portion of the second electric wire is a bus bar or a cylindrical single-core wire, but it may be another configuration such as a twisted wire. (2) In each of the above embodiments, the insulating portion between the conductor portion of the first electric wire and the protective member is configured to be adhered to the conductor portion of the first electric wire. However, the insulating portion may be adhered to the protective member, or may not be adhered to either the conductor portion of the first electric wire or the protective member. (3) Implementation of each of the above In a state In the above embodiment, the insulating portion between the conductor portion of the first electric wire and the conductor portion of the second electric wire is adhered to the conductor portion of the second electric wire, but it may be adhered to the conductor portion of the first electric wire, or it may be not adhered to either the conductor portion of the first electric wire or the conductor portion of the second electric wire. (4) The first electric wire may not have a flat portion, the second electric wire may not have a second flat portion, and the protective member may not have a protective member-side flat portion. (5) The first electric wire and the protective member do not have to be rectangular tubular. The first electric wire and the protective member may be cylindrical, or may have a semicircular cross section. The first electric wire and the protective member may have different shapes. (6) The protective member does not have to be electrically conductive. The protective member may be made of synthetic resin instead of metal. The protective member may be a corrugated tube. (7) The protective member does not have to be cylindrical as long as it is capable of housing the first electric wire. (8) In each of the above embodiments, the first electric wire has one hollow portion, but the first electric wire may have a plurality of hollow portions. In other words, the plurality of hollow portions may be arranged in parallel. [Explanation of symbols]

[0050] 10…First electric wire 11...Hollow part 12...Hollow conductor 13…Insulating coating 14...Flat part 20…Second electric wire 22...Center conductor 23...Second insulating coating 24…Second flat part 40...Protective material 41...Protective member side hollow part 44…Protection member side flat part 90…Vehicle 91…In-vehicle equipment 92…Main battery 93…Sub battery 220…Second wire 221…Second hollow part 222…Second hollow conductor 223…Second insulating coating 224…Second flat part 230…Third wire 232...Center conductor 233…Third insulating coating 234...Third flat part 320…Second wire 322…Core wire 323…Second insulating coating 420A…Second wire 420B…Second electric wire W…Wire harness W2…Wire harness W3…Wire harness W4…Wire harness

Claims

1. A cylindrical first electric wire configured as a hollow electric wire; a protective member that accommodates the first electric wire, The first electric wire has a hollow portion capable of accommodating the second electric wire, A wire harness that can be installed in a vehicle equipped with a main battery and a sub-battery, The first electric wire is electrically connected to the main battery, The second electric wire is a wire harness that is electrically connected to the sub-battery.

2. A cylindrical first electric wire configured as a hollow electric wire; a protective member that accommodates the first electric wire, The first electric wire has a hollow portion capable of accommodating the second electric wire, The second electric wire has a second hollow portion capable of accommodating a third electric wire.

3. 3 . The wire harness according to claim 1 , wherein the first electric wire includes a cylindrical hollow conductor having the hollow portion, and an insulating coating covering an outer periphery of the hollow conductor. 4 .

4. The wire harness according to claim 1 , wherein the first electric wire has a flat portion having a cross-sectional width greater than a cross-sectional height.

5. The inner peripheral shape of the cross section of the protective member is non-circular, The wire harness according to claim 1 , wherein an outer circumferential shape of a cross section of the first electric wire is non-circular.

6. The wire harness according to claim 5 , wherein both the protection member and the first electric wire are in a rectangular tubular shape.

7. The wire harness according to claim 1 , wherein the protective member is a shielded pipe having electrical conductivity.

Images