Wire harness

Abstract

To provide a wire harness that can suppress deterioration in electromagnetic shielding performance.SOLUTION: A wire harness 10 includes electric wires 20, a conductive cylindrical member 31 through which the electric wires 20 pass, and a cylindrical electromagnetic shielding member 32 that surrounds the outer periphery of the electric wires 20 and is fixed to the end of the cylindrical member 31. The wire harness 10 includes an annular fixing member 34 that fixes the electromagnetic shielding member 32 to the end of the cylindrical member 31, and an oxidation suppressing layer 51 that seals a fixing portion where the cylindrical member 31 and the electromagnetic shielding member 32 are fixed by the fixing member 34.SELECTED DRAWING: Figure 3

Description

Technical Field

[0004] , , , , , , ,

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

Background Art

[0002] Conventionally, in a wire harness used in a vehicle such as a hybrid vehicle or an electric vehicle, in order to shield electromagnetic waves (electromagnetic noise) generated when electricity is applied to an electric wire, the outer periphery of the electric wire is surrounded by an electromagnetic shielding member (see, for example, Patent Document 1). As the electromagnetic shielding member, for example, a braided member in which conductive strands are braided into a cylindrical shape, a metal foil, or the like is used. In this type of wire harness, the axial end of the electromagnetic shielding member is fixed to a conductive cylindrical member by a fixing member such as caulking. Thereby, the electromagnetic shielding member and the cylindrical member are electrically connected.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above wire harness, oxidation of the electromagnetic shielding member tends to progress due to repeated heating and cooling in the air. When the oxidation of the electromagnetic shielding member progresses, the electrical resistance value at the electrical connection portion between the electromagnetic shielding member and the cylindrical member increases. As a result, there arises a problem that the electromagnetic shielding performance deteriorates.

[0005] An object of the present disclosure is to provide a wire harness capable of suppressing a decrease in electromagnetic shielding performance.

Means for Solving the Problems

[0007] The wire harness described herein has the effect of suppressing the deterioration of electromagnetic shielding performance. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram showing a wire harness according to one embodiment. [Figure 2] Figure 2 is a schematic side view showing a wire harness according to one embodiment. [Figure 3] Figure 3 is a schematic longitudinal cross-sectional view showing an enlarged view of the fixing portions of the cylindrical member and the electromagnetic shielding member in a wire harness according to one embodiment. [Figure 4] Figure 4 is a schematic longitudinal cross-sectional view showing a further enlarged view of the fixing portions of the cylindrical member and the electromagnetic shielding member in a wire harness according to one embodiment. [Figure 5] Figure 5 is a schematic cross-sectional view showing the fixing portions of the cylindrical member and the electromagnetic shielding member in a wire harness according to one embodiment. [Figure 6] Figure 6 is a schematic cross-sectional view showing the fixing portion of the shield shell and electromagnetic shielding member in a wire harness according to one embodiment. [Figure 7] Figure 7 is a schematic perspective view showing an electromagnetic shielding member according to one embodiment. [Figure 8] Figure 8 is a schematic longitudinal cross-sectional view showing a modified wire harness. [Modes for carrying out the invention]

[0009] [Description of Embodiments in this Disclosure] First, embodiments of this disclosure will be listed and described. [1] The wire harness of the present disclosure comprises an electric wire, a conductive cylindrical member through which the electric wire passes, a cylindrical electromagnetic shielding member surrounding the outer circumference of the electric wire and fixed to the end of the cylindrical member, an annular fixing member fixing the electromagnetic shielding member to the end of the cylindrical member, and an oxidation suppression layer sealing the fixing portion of the cylindrical member and the electromagnetic shielding member by the fixing member.

[0010] In this configuration, the fixing portions of the cylindrical member and the electromagnetic shielding member by the fixing members are sealed by an oxidation-inhibiting layer. This prevents the cylindrical member and the electromagnetic shielding member from coming into contact with air at the fixing portions, thereby preventing oxidation of the cylindrical member and the electromagnetic shielding member at the fixing portions. As a result, it is possible to suppress an increase in the electrical resistance value at the electrical connection portion between the cylindrical member and the electromagnetic shielding member, and thus prevent a decrease in the electromagnetic shielding performance of the wire harness.

[0011] Herein, the term "tubular" as used in this specification includes not only structures with a continuous circumferential wall along their entire circumference, but also structures formed by combining multiple parts, and structures with notches or other cutouts in the circumferential direction, such as a C-shape. The shape of a "tubular" includes, but is not limited to, circular, elliptical, and polygonal shapes with pointed or rounded corners. Furthermore, the term "ring" as used in this specification may refer to any structure that forms a loop, or a continuous shape without ends, as well as a generally loop-shaped structure with a gap, such as a C-shape. The shape of a "ring" includes, but is not limited to, circular, elliptical, and polygonal shapes with pointed or rounded corners.

[0012] [2] In the above [1], the oxidation-suppressing layer continuously covers the outer circumferential surface of the fixing member, the side surface of the fixing member, the outer circumferential surface of the electromagnetic shielding member exposed from the fixing member, and the outer circumferential surface of the cylindrical member exposed from the electromagnetic shielding member, and the oxidation-suppressing layer covers the outer circumferential surface of the fixing member over its entire circumference, the oxidation-suppressing layer covers the outer circumferential surface of the electromagnetic shielding member over its entire circumference, and the oxidation-suppressing layer covers the outer circumferential surface of the cylindrical member over its entire circumference.

[0013] In this configuration, the oxidation-suppressing layer is formed to continuously cover the outer surfaces of the fixing member, the electromagnetic shielding member, and the cylindrical member, spanning across the fixing member, the electromagnetic shielding member, and the cylindrical member. This effectively prevents the cylindrical member and the electromagnetic shielding member from coming into contact with air in the fixing portion, thus effectively suppressing oxidation of the cylindrical member and the electromagnetic shielding member in the fixing portion. As a result, an increase in the electrical resistance value at the electrical connection portion between the cylindrical member and the electromagnetic shielding member can be effectively suppressed, and a decrease in the electromagnetic shielding performance of the wire harness can be effectively suppressed.

[0014] [3] In the above [1] or [2], the oxidation-suppressing layer may have heat resistance of 120°C or higher. With this configuration, the oxidation-inhibiting layer has heat resistance of 120°C or higher. Therefore, even when the wire harness is exposed to a high-temperature environment of about 100°C to 115°C during heat cycle tests, etc., the deterioration of the oxidation-inhibiting layer can be effectively suppressed. For example, even when the wire harness is exposed to a high-temperature environment, the deformation or melting of the oxidation-inhibiting layer can be effectively suppressed. As a result, even when the wire harness is exposed to a high-temperature environment, the sealing state of the fixed portion by the oxidation-inhibiting layer can be maintained, and the oxidation of the cylindrical member and electromagnetic shielding member in the fixed portion can be effectively suppressed.

[0015] [4] In the above [3], the oxidation-suppressing layer may be made of a silicone sealant. According to this configuration, the oxidation suppression layer is composed of a silicone sealing material having excellent heat resistance. Thereby, even when the wire harness is exposed to a high-temperature environment, it is possible to suitably suppress the oxidation suppression layer from being deformed or melted.

[0016] [5] In any one of the above [1] to [4], the electromagnetic shielding member is a braided member having a plurality of conductive strands braided therein and having a mesh, the oxidation suppression layer covers the entire inner peripheral surface of the fixing member, and the oxidation suppression layer may fill the mesh in the electromagnetic shielding member at a portion contacting the inner peripheral surface of the fixing member.

[0017] According to this configuration, the oxidation suppression layer is formed so as to cover the entire inner peripheral surface of the fixing member and is formed so as to fill the mesh of the electromagnetic shielding member at a portion contacting the inner peripheral surface of the fixing member. Thereby, the oxidation suppression layer can be formed so as to fill the gap between the inner peripheral surface of the fixing member and the outer peripheral surface of the cylindrical member. For this reason, it is possible to suppress foreign matter from entering the gap between the inner peripheral surface of the fixing member and the outer peripheral surface of the cylindrical member, and to suppress the generation of unintended products in the gap between the inner peripheral surface of the fixing member and the outer peripheral surface of the cylindrical member. Therefore, it is possible to suitably suppress an increase in the electrical resistance value at the electrical connection portion between the cylindrical member and the electromagnetic shielding member due to foreign matter or unintended products, and to suitably suppress a decrease in the electromagnetic shielding performance of the wire harness.

[0018] [(6)] In any one of the above [1] to [5], the oxidation suppression layer extends along the axial direction of the cylindrical member, and the outer peripheral dimension of the oxidation suppression layer may be constant over the entire length in the length direction of the oxidation suppression layer.

[0019] Incidentally, in a fixed portion where an electromagnetic shielding member is fixed to the outer surface of a cylindrical member by a fixing member, a first stepped portion is formed on the outer surface of the fixed portion by the outer surface of the fixing member, the side surface of the fixing member, and the outer surface of the electromagnetic shielding member. In contrast, in the above configuration, the outer dimensions of the oxidation suppression layer are constant along the entire length of the oxidation suppression layer. As a result, the step corresponding to the first stepped portion can be eliminated from the outer surface of the oxidation suppression layer.

[0020] Here, "outer circumference dimension of member A" in this specification refers to the length of the outer circumference of member A measured around the circumferential direction of member A. Also, "inner circumference dimension of member A" in this specification refers to the length of the inner circumference of member A measured around the circumferential direction of member A.

[0021] [7] In the above [6], the thickness of the oxidation suppression layer in the portion that covers the outer peripheral surface of the electromagnetic shielding member that is exposed from the fixing member may be greater than the thickness of the oxidation suppression layer in the portion that covers the outer peripheral surface of the fixing member.

[0022] This configuration allows for a larger thickness of the oxidation-suppressing layer in the portion that directly covers the outer surface of the electromagnetic shielding member exposed from the fixed member. As a result, the cushioning properties of the oxidation-suppressing layer in the portion that directly covers the outer surface of the electromagnetic shielding member exposed from the fixed member can be improved, thereby enhancing the protective performance of the oxidation-suppressing layer in that portion.

[0023] [8] In the above [6] or [7], the waterproof member further comprises a cylindrical waterproof member surrounding the outer periphery of the oxidation-suppressing layer, wherein the waterproof member comprises a main cylindrical portion that surrounds the outer periphery of the oxidation-suppressing layer over its entire circumference, and a first connecting cylindrical portion that is formed integrally with the main cylindrical portion and connected to the outer circumferential surface of the cylindrical member, wherein the inner circumference of the main cylindrical portion is greater than or equal to the outer circumference of the oxidation-suppressing layer, and the inner circumference of the first connecting cylindrical portion may be smaller than the outer circumference of the oxidation-suppressing layer.

[0024] In this configuration, the inner circumference of the main cylindrical portion is formed to be greater than or equal to the outer circumference of the oxidation-inhibiting layer, while the inner circumference of the first connecting cylindrical portion is formed to be smaller than the outer circumference of the oxidation-inhibiting layer. As a result, the oxidation-inhibiting layer and the first connecting cylindrical portion can engage in the axial direction of the waterproofing member. Therefore, when attaching the waterproofing member to the cylindrical member and the oxidation-inhibiting layer, the positioning of the waterproofing member relative to the oxidation-inhibiting layer can be easily performed.

[0025] [9] In any of the above [1] to [5], the outer surface of the oxidation suppression layer may be formed in a stepped shape along a first stepped portion formed by the outer surface of the fixing member, the side surface of the fixing member and the outer surface of the electromagnetic shielding member, and a second stepped portion formed by the outer surface of the electromagnetic shielding member and the outer surface of the cylindrical member.

[0026] In this configuration, the outer surface of the oxidation-suppressing layer is formed in a stepped manner along the first and second stepped portions. As a result, compared to the case where the outer surface of the oxidation-suppressing layer is formed in a non-stepped manner to absorb the step difference between the first and second stepped portions, there are fewer areas in the oxidation-suppressing layer that are formed to be partially thicker. Therefore, the volume of the oxidation-suppressing layer can be reduced. Consequently, the material cost of the oxidation-suppressing layer can be reduced.

[0027] [Details of the embodiments of this disclosure] Specific examples of the wire harnesses of this disclosure will be described below with reference to the drawings. In each drawing, some parts of the configuration may be exaggerated or simplified for ease of explanation. Also, the dimensional ratios of each part may differ in each drawing. In this specification, "parallel," "orthogonal," "full length," and "full circumference" include not only cases where they are strictly parallel, orthogonal, full length, or full circumference, but also cases where they are approximately parallel, orthogonal, full length, or full circumference within the range that achieves the effects of this embodiment. In this specification, terms such as "first," "second," etc., attached to each configuration are convenient indicators used to distinguish each configuration and do not rank the configurations unless otherwise specified. The present invention is not limited to these examples and is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included.

[0028] (Overall configuration of wire harness 10) The wire harness 10 shown in Figure 1 is installed in a vehicle V such as a hybrid vehicle or an electric vehicle. The wire harness 10 electrically connects two or more on-board devices. On-board devices are electrical devices installed in the vehicle V. For example, the wire harness 10 electrically connects a high-voltage battery M1 installed at the rear of the vehicle V to an inverter M2 installed in front of the high-voltage battery M1. The high-voltage battery M1 is, for example, a battery capable of supplying a voltage of several hundred volts. The inverter M2 is connected to a motor (not shown) for wheel drive, which is the power source for the vehicle's movement. The inverter M2 generates AC power from the DC power of the high-voltage battery M1 and supplies that AC power to the motor. The wire harness 10 is formed in a long shape so as to extend in the front-rear direction of the vehicle V.

[0029] The wire harness 10 includes, for example, one or more electric wires 20, connectors C1 and C2 attached to both ends of the electric wires 20, and an electromagnetic shielding component 30 surrounding the outer circumference of the electric wires 20. In this embodiment, the wire harness 10 includes two electric wires 20. The first end of each electric wire 20 in the longitudinal direction is connected to the high-voltage battery M1 via connector C1, and the second end of each electric wire 20 in the longitudinal direction is connected to the inverter M2 via connector C2.

[0030] As shown in Figure 2, the electromagnetic shielding component 30 comprises a conductive cylindrical member 31, a conductive cylindrical electromagnetic shielding member 32, and a conductive cylindrical shield shell 33. The electromagnetic shielding component 30 includes, for example, a fixing member 34 that fixes the first axial end of the electromagnetic shielding member 32 to the end of the cylindrical member 31, and a fixing member 35 that fixes the second axial end of the electromagnetic shielding member 32 to the end of the shield shell 33. The cylindrical member 31, the electromagnetic shielding member 32, and the shield shell 33 are connected to each other by the fixing members 34 and 35, thereby forming a series of electrically conductive cylinders. For example, crimping rings, cable ties, or tape members can be used as the fixing members 34 and 35. For example, iron-based, aluminum-based, or copper-based metal materials can be used as the material for the crimping rings. In this embodiment, the fixing members 34 and 35 are crimping rings. The fixing members 34 and 35 may be made of the same type of metal as the electromagnetic shielding member 32, or they may be made of a different metal. In this embodiment, the fixing members 34 and 35 are made of a different metal than the electromagnetic shielding member 32, and are stainless steel.

[0031] As shown in Figures 2, 3, and 4, the wire harness 10 includes an oxidation-inhibiting layer 51 that covers the fixed portion between the cylindrical member 31 and the electromagnetic shielding member 32 by a fixing member 34. As shown in Figure 2, the wire harness 10 includes an oxidation-inhibiting layer 52 that covers the fixed portion between the shield shell 33 and the electromagnetic shielding member 32 by a fixing member 35. The oxidation-inhibiting layers 51 and 52 have heat resistance of, for example, 120°C or higher. Preferably, the oxidation-inhibiting layers 51 and 52 have heat resistance of, for example, 150°C or higher, and more preferably 200°C or higher. As the material for the oxidation-inhibiting layers 51 and 52, for example, a curable material that hardens from a fluid state to a non-fluid state can be used. Examples of curable materials include resin-based or rubber-based curable materials. Examples of curable materials include adhesives, sealants, and caulking materials. Silicone sealants can be suitably used as the material for the oxidation-inhibiting layers 51 and 52.

[0032] The wire harness 10 includes, for example, a cylindrical protective member 61 that surrounds the outer circumference of the electromagnetic shielding member 32, and a cylindrical waterproof member 62. As shown in Figure 3, the wire harness 10 includes, for example, a fixing member 71 that fixes the first axial end of the waterproof member 62 to the cylindrical member 31, and a fixing member 72 that fixes the second axial end of the waterproof member 62 to the protective member 61. For example, crimping rings, cable ties, or tape members can be used as fixing members 71 and 72. In this embodiment, the fixing members 71 and 72 are cable ties.

[0033] (Configuration of the 20 electric wires) As shown in Figures 5 and 6, each electric wire 20 is a covered electric wire having a core wire 21 made of a conductor and an insulating coating 22 that surrounds the outer circumference of the core wire 21 and has electrical insulating properties. Each electric wire 20 is, for example, a high-voltage electric wire capable of handling high voltage and high current. Each electric wire 20 may be, for example, a non-shielded electric wire that does not have an electromagnetic shielding structure, or a shielded electric wire that has an electromagnetic shielding structure. Each electric wire 20 in this embodiment is a non-shielded electric wire. Note that the waterproof member 62 is not shown in Figure 5.

[0034] As the core wire 21, for example, a stranded wire made by twisting together multiple metal strands or a single core wire consisting of a single conductor can be used. As a single core wire, for example, a columnar conductor consisting of a single columnar metal rod with a solid internal structure or a cylindrical conductor with a hollow internal structure can be used. In addition, a combination of stranded wire, columnar conductor, and cylindrical conductor may be used as the core wire 21. As the material of the core wire 21, for example, copper-based or aluminum-based metal materials can be used.

[0035] The insulating coating 22 covers the outer surface of the core wire 21 around its entire circumference. The insulating coating 22 is made of, for example, an insulating resin material. The cross-sectional shape obtained by cutting each electric wire 20 with a plane perpendicular to the longitudinal direction of each electric wire 20, that is, the cross-sectional shape of each electric wire 20, can be formed into any shape. The cross-sectional shape of each electric wire 20 can be formed into, for example, a circular shape, a semicircular shape, a polygonal shape, a flattened shape, etc. In this embodiment, the cross-sectional shape of each electric wire 20 is formed into a circular shape. In this specification, "flattened shape" includes rectangles, ovals, and ellipses. In this specification, "oval" is a rounded rectangle consisting of two parallel lines of approximately equal length and two semicircles. In this specification, "oval" has a longer side on which the parallel lines extend and a shorter side extending in the direction in which the two parallel lines are aligned.

[0036] (Structure of the cylindrical member 31) As shown in Figure 2, the cylindrical member 31 is formed, for example, in the shape of a long cylinder. The cylindrical member 31 is routed so as to pass outside the vehicle, such as under the floor of a vehicle V. The cylindrical member 31 houses, for example, the middle portion of the electric wire 20 in the longitudinal direction. In other words, the electric wire 20 passes through the inside of the cylindrical member 31. The cylindrical member 31 surrounds multiple electric wires 20 together. The cylindrical member 31 has the function of protecting the electric wires 20 housed inside from flying objects and water droplets. Here, in this specification, "to surround member A and member B together" means, for example, that member A and member B are surrounded together by a single cylindrical member without a wall being provided between them.

[0037] The cylindrical member 31 has, for example, higher bending rigidity than the electromagnetic shielding member 32. The cylindrical member 31 has, for example, higher bending rigidity than the protective member 61. The cylindrical member 31 is, for example, less prone to bending than each of the electromagnetic shielding member 32 and the protective member 61. The cylindrical member 31 has, for example, rigidity sufficient to maintain the path of the electric wire 20. The cylindrical member 31 has, for example, sufficient rigidity so that when mounted on a vehicle V, it is not released from its straight or bent state due to vibrations of the vehicle V.

[0038] The cylindrical member 31 is a conductive shielding pipe. For example, a metal pipe can be used as the cylindrical member 31. For example, copper-based or aluminum-based metal materials can be used as the material for the cylindrical member 31. In this embodiment, the cylindrical member 31 is made of an aluminum-based metal material. The cylindrical member 31, being a shielding pipe, has an electromagnetic shielding function that suppresses the radiation of electromagnetic waves from the electric wire 20.

[0039] The cross-sectional shape of the cylindrical member 31 can be any shape. For example, the cross-sectional shape of the cylindrical member 31 can be formed as a circle, a semicircle, a polygon, or a flattened shape. As shown in Figure 5, the cross-sectional shape of the cylindrical member 31 in this embodiment is formed as a circle. The cylindrical member 31 in this embodiment is formed as a cylinder in which the cross-sectional shape along the inner circumferential surface and the outer circumferential surface are both circular.

[0040] (Configuration of the shield shell 33) As shown in Figure 2, the shield shell 33 is provided on the connector C1. The shield shell 33 is attached, for example, to the outside of the connector housing (not shown) of the connector C1. The shield shell 33 is located, for example, inside the vehicle interior. The shield shell 33 is formed in a cylindrical shape that encloses multiple electric wires 20 together. The shield shell 33 has, for example, higher bending rigidity than the electromagnetic shielding member 32. The shield shell 33 is, for example, less prone to bending than the electromagnetic shielding member 32.

[0041] The shield shell 33 is made of metal, for example. For the material of the shield shell 33, iron-based or aluminum-based metal materials can be used. The shield shell 33 has an electromagnetic shielding function that suppresses the radiation of electromagnetic waves from the power line 20.

[0042] The cross-sectional shape of the shield shell 33 can be any shape. For example, the cross-sectional shape of the shield shell 33 can be formed as a circle, semicircle, polygon, or flattened shape. As shown in Figure 6, the circular cross-section of the shield shell 33 in this embodiment is formed as an oval shape. The shield shell 33 in this embodiment is formed as an elongated cylinder with an oval cross-sectional shape along both the inner and outer circumferential surfaces.

[0043] (Configuration of electromagnetic shielding member 32) As shown in Figure 2, the electromagnetic shielding member 32 is formed, for example, in the shape of a long cylinder. The electromagnetic shielding member 32 is formed to span between the cylindrical member 31 and the shield shell 33 in the longitudinal direction of the electric wire 20. The electromagnetic shielding member 32 is formed to surround the outer circumference of the portion of a plurality of electric wires 20 that is exposed from the cylindrical member 31 and the shield shell 33. The electromagnetic shielding member 32 is formed to surround the outer circumference of a plurality of electric wires 20 provided between the cylindrical member 31 and the shield shell 33 as a whole. The electromagnetic shielding member 32 surrounds the outer circumference of the electric wire 20 over its entire circumference in the circumferential direction. The first axial end of the electromagnetic shielding member 32 surrounds the outer circumference of the cylindrical member 31 over its entire circumference in the circumferential direction. The second axial end of the electromagnetic shielding member 32 surrounds the outer circumference of the shield shell 33 over its entire circumference in the circumferential direction.

[0044] The electromagnetic shielding member 32 is, for example, flexible. The electromagnetic shielding member 32 is, for example, more flexible than the cylindrical member 31. The electromagnetic shielding member 32 is, for example, more flexible than the shield shell 33. As the electromagnetic shielding member 32, for example, a braided member or metal foil can be used, which is composed of multiple conductive strands woven together. The electromagnetic shielding member 32 in this embodiment is a braided member.

[0045] As shown in Figure 7, the electromagnetic shielding member 32 has, for example, a plurality of wire bundles 41. The electromagnetic shielding member 32 is formed, for example, by weaving the plurality of wire bundles 41 into a tubular shape. The electromagnetic shielding member 32 is formed, for example, by weaving the plurality of wire bundles 41 in a plain weave, that is, by crossing the warp and weft threads and making them alternately rise and fall. The electromagnetic shielding member 32 has a mesh 42 formed by two wire bundles 41 that serve as warp threads and two wire bundles 41 that serve as weft threads. The weaving method of the wire bundles 41 is not particularly limited, and for example, they may be woven in a satin weave or twill weave.

[0046] Each strand bundle 41 has multiple (four in Figure 7) metal strands 43. That is, in the electromagnetic shielding member 32, multiple metal strands 43 are grouped together as one set (pick), i.e., one strand bundle 41. As the material of each metal strand 43, for example, copper-based or aluminum-based metal materials can be used. As the material of each metal strand 43, for example, it may be the same type of metal material as the cylindrical member 31, or it may be a different metal material from the cylindrical member 31. In this embodiment, the material of each metal strand 43 is a different metal material from the cylindrical member 31, and is a copper-based metal material.

[0047] (Configuration of the fixing member 34) As shown in Figure 3, the fixing member 34 fixes the first end of the electromagnetic shielding member 32 to the outer circumferential surface of the cylindrical member 31, with the first axial end of the electromagnetic shielding member 32 in contact with the outer circumferential surface of the cylindrical member 31. The fixing member 34 is attached to the outer circumferential surface of the first end of the electromagnetic shielding member 32. The fixing member 34 is fitted to the outside of the cylindrical member 31 in such a manner that it sandwiches the first end of the electromagnetic shielding member 32 between itself and the outer circumferential surface of the cylindrical member 31. The fixing member 34 is formed, for example, in an annular shape along the outer circumferential surface of the cylindrical member 31.

[0048] As shown in Figure 5, the fixing member 34 has, for example, a main body portion 34A formed in an annular shape and a fastening portion 34B provided that protrudes radially outward from the main body portion 34A. In this embodiment, the main body portion 34A is formed in an annular shape along the outer circumferential surface of a cylindrical tubular member 31. The inner circumferential surface of the main body portion 34A is in contact with the outer circumferential surface of the electromagnetic shielding member 32. For example, the inner circumferential surface of the main body portion 34A is in close contact with the outer circumferential surface of the electromagnetic shielding member 32 over the entire circumference of the main body portion 34A.

[0049] The fixing member 34 fastens to the radially inward side of the cylindrical member 31, thereby fixing the first end of the electromagnetic shielding member 32 to the outer circumferential surface of the cylindrical member 31. In other words, the fixing member 34, which is a crimping ring, fastens to the outer circumferential surface of the cylindrical member 31 by crimping it with the first end of the electromagnetic shielding member 32 sandwiched between it and the outer circumferential surface of the cylindrical member 31. More specifically, the base portions of the fastening parts 34B of the fixing member 34 are separated from each other before fastening. By constricting and deforming these base portions of the fastening parts 34B so that they come closer together in the direction indicated by the arrows in Figure 5, the main body portion 34A of the fixing member 34 is reduced in diameter, thereby fixing the first end of the electromagnetic shielding member 32 to the outer circumferential surface of the cylindrical member 31. As a result, the first end of the electromagnetic shielding member 32 is fixed to the outer surface of the cylindrical member 31 in direct contact with the outer surface of the cylindrical member 31, and the electromagnetic shielding member 32 is electrically and mechanically connected to the cylindrical member 31. The crimped portion 34B after crimping has an internal space 34X. The internal space 34X is provided separately from the internal space of the main body portion 34A, which houses the cylindrical member 31 and the electromagnetic shielding member 32.

[0050] (Configuration of the fixing member 35) As shown in Figure 2, the fixing member 35 fixes the second end of the electromagnetic shielding member 32 to the outer circumferential surface of the shield shell 33, with the second end of the electromagnetic shielding member 32 in contact with the outer circumferential surface of the shield shell 33. The fixing member 35 is attached to the outer circumferential surface of the second end of the electromagnetic shielding member 32. The fixing member 35 is fitted to the outside of the shield shell 33 in such a manner that it sandwiches the second end of the electromagnetic shielding member 32 between itself and the outer circumferential surface of the shield shell 33. The fixing member 35 is formed, for example, in an annular shape along the outer circumferential surface of the shield shell 33.

[0051] As shown in Figure 6, the fixing member 35 has, for example, a main body portion 35A formed in an annular shape and one or more clamping portions 35B that protrude radially outward from the main body portion 35A. The fixing member 35 in this embodiment has two clamping portions 35B. The main body portion 35A in this embodiment is formed in an oval annular shape along the outer circumferential surface of the elongated cylindrical shield shell 33. The inner circumferential surface of the main body portion 35A is in contact with the outer circumferential surface of the electromagnetic shielding member 32. The inner circumferential surface of the main body portion 35A is, for example, in close contact with the outer circumferential surface of the electromagnetic shielding member 32 over the entire circumference of the main body portion 35A. The two clamping portions 35B are, for example, provided on the two short sides of the main body portion 35A.

[0052] The fixing member 35 is crimped to the outer surface of the shield shell 33 with the second end of the electromagnetic shielding member 32 sandwiched between the fixing member 35 and the outer surface of the shield shell 33, thereby fixing the second end of the electromagnetic shielding member 32 to the outer surface of the shield shell 33. For example, by constricting and deforming the clamping portion 35B, the main body portion 35A of the fixing member 35 is reduced in diameter, thereby fixing the second end of the electromagnetic shielding member 32 to the outer surface of the shield shell 33. As a result, the second end of the electromagnetic shielding member 32 is fixed to the outer surface of the shield shell 33 in direct contact with the outer surface of the shield shell 33, and the electromagnetic shielding member 32 is electrically and mechanically connected to the shield shell 33.

[0053] As shown in Figure 2, in the wire harness 10, the cylindrical member 31 and the shield shell 33 are electrically connected via the electromagnetic shielding member 32. Although not shown in the figure, the shield shell 33 is also grounded to a vehicle panel or the like. This connects the cylindrical member 31, the electromagnetic shielding member 32, and the shield shell 33 to the ground.

[0054] (Composition of the oxidation-suppressing layer 51) As shown in Figure 4, the oxidation suppression layer 51 is formed to seal the portion fixed by the fixing member 34 between the electromagnetic shielding member 32 and the cylindrical member 31. The oxidation suppression layer 51 seals the portion fixed by the fixing member 34 so that it is isolated from the external space of the oxidation suppression layer 51. By sealing the portion fixed by the fixing member 34, the oxidation suppression layer 51 prevents the fixed portion from coming into contact with air (outside air), thereby suppressing oxidation of the electromagnetic shielding member 32, the cylindrical member 31, and the fixing member 34 at the fixed portion. The oxidation suppression layer 51 continuously covers the outer circumferential surface of the fixing member 34, the side surface of the fixing member 34, the outer circumferential surface of the electromagnetic shielding member 32 exposed from the fixing member 34, and the outer circumferential surface of the cylindrical member 31 exposed from the electromagnetic shielding member 32. Here, the side surface of the fixing member 34 is the axial end surface of the fixing member 34. The oxidation suppression layer 51 is formed to extend, for example, along the axial direction of the cylindrical member 31. In other words, the oxidation-suppressing layer 51 extends in a longitudinal direction parallel to the axial direction of the cylindrical member 31. Note that in Figure 4, for the sake of simplifying the drawing, multiple metal wires 43 in each wire bundle 41 of the electromagnetic shielding member 32 are shown as a single unit. Also, in Figure 4, the protective member 61 and the waterproof member 62 are not shown.

[0055] The oxidation-inhibiting layer 51 tightly covers the entire outer surface of the fixing member 34. Specifically, the oxidation-inhibiting layer 51 tightly covers the outer surface of the fixing member 34 along its entire axial length. Also, as shown in Figure 5, the oxidation-inhibiting layer 51 tightly covers the outer surface of the fixing member 34 along its entire circumference. The oxidation-inhibiting layer 51 covers the outer surface of the main body portion 34A of the fixing member 34 along its entire circumference, and also covers the outer surface of the clamping portion 34B of the fixing member 34 along its entire circumference. For example, the oxidation-inhibiting layer 51 covers the inner surface of the clamping portion 34B along its entire circumference. For example, the oxidation-inhibiting layer 51 is formed to fill the internal space 34X of the clamping portion 34B.

[0056] The oxidation-suppressing layer 51 tightly covers the outer surface of the electromagnetic shielding member 32 over its entire circumference. The oxidation-suppressing layer 51 tightly covers the outer surface of the cylindrical member 31 over its entire circumference.

[0057] Here, as shown in Figure 4, a first stepped portion D1 is formed on the outer circumferential surface of the fixed portion by the fixing member 34 by the outer circumferential surface of the fixing member 34, the side surface of the fixing member 34, and the outer circumferential surface of the electromagnetic shielding member 32. This first stepped portion D1 is provided at both ends in the axial direction of the fixing member 34. In other words, the outer circumferential surface of the fixed portion by the fixing member 34 has two first stepped portions D1. Furthermore, a second stepped portion D2 is formed on the outer circumferential surface of the fixed portion by the fixing member 34 by the outer circumferential surface of the electromagnetic shielding member 32, the axial end surface of the electromagnetic shielding member 32, and the outer circumferential surface of the cylindrical member 31. The second stepped portion D2 is formed, for example, in continuity with one of the two first stepped portions D1. The second stepped portion D2 is provided at the terminal end of the first axial end of the electromagnetic shielding member 32.

[0058] The oxidation-suppressing layer 51 is formed to continuously cover, for example, the outer circumferential surface of the fixing member 34, the two first stepped portions D1, and the one second stepped portion D2. The oxidation-suppressing layer 51 covers the outer circumferential surface of the electromagnetic shielding member 32 located outside each of the axial ends of the fixing member 34 in the axial direction of the fixing member 34. The oxidation-suppressing layer 51 covers, for example, the outer circumferential surface of the cylindrical member 31 that is exposed through the mesh 42 of the electromagnetic shielding member 32 provided at a position that does not overlap with the fixing member 34 in the radial direction of the cylindrical member 31. The oxidation-suppressing layer 51 is formed to fill the mesh 42 of the electromagnetic shielding member 32 provided at a position that does not overlap with the fixing member 34 in the radial direction of the cylindrical member 31.

[0059] The oxidation-inhibiting layer 51 covers, for example, the entire inner circumferential surface of the fixing member 34. The oxidation-inhibiting layer 51 covers, for example, the inner circumferential surface of the fixing member 34 along its entire axial length. The oxidation-inhibiting layer 51 covers, for example, the inner circumferential surface of the fixing member 34 along its entire circumference. The oxidation-inhibiting layer 51 covers, for example, the outer circumferential surface of the cylindrical member 31 that is exposed from the mesh 42 of the electromagnetic shielding member 32 in the portion that contacts the inner circumferential surface of the fixing member 34. The oxidation-inhibiting layer 51 is formed to fill the mesh 42 of the electromagnetic shielding member 32 in the portion that contacts the inner circumferential surface of the fixing member 34. That is, the oxidation-inhibiting layer 51 is formed to fill the mesh 42 of the electromagnetic shielding member 32 in the portion that contacts the inner circumferential surface of the fixing member 34. The oxidation-inhibiting layer 51 is formed to fill the gap between the inner circumferential surface of the fixing member 34 and the outer circumferential surface of the cylindrical member 31.

[0060] As shown in Figures 3 and 5, the oxidation-inhibiting layer 51 is formed, for example, in a cylindrical shape overall. The oxidation-inhibiting layer 51 has through holes 51X through which the cylindrical member 31 passes. The through holes 51X are formed to penetrate the oxidation-inhibiting layer 51 in the longitudinal direction. The shape of the through holes 51X as viewed from the longitudinal direction of the oxidation-inhibiting layer 51 is formed to conform to the outer circumferential surface of the cylindrical member 31. As shown in Figure 5, the shape of the through holes 51X as viewed from the longitudinal direction of the oxidation-inhibiting layer 51 is formed to be circular.

[0061] The cross-sectional shape along the outer circumferential surface of the oxidation-suppressing layer 51 can be any shape. The cross-sectional shape of the oxidation-suppressing layer 51 can be formed, for example, as a circular shape, polygonal shape, or flattened shape. The cross-sectional shape of the oxidation-suppressing layer 51 can be formed to be different from the shape along the outer circumferential surface of the fixing member 34. In this embodiment, the circular cross-section of the oxidation-suppressing layer 51 is formed to be rectangular. In this embodiment, the cross-sectional shape of the oxidation-suppressing layer 51 is formed to be rectangular in size that can enclose the entire fixing member 34. In this embodiment, the oxidation-suppressing layer 51 can have different thicknesses in each part in the circumferential direction.

[0062] As shown in Figure 4, the outer circumference dimensions of the oxidation suppression layer 51 are constant along its entire length. The oxidation suppression layer 51 has different thicknesses in different parts along its length. For example, the thickness T1 of the oxidation suppression layer 51 covering the outer surface of the fixing member 34 is thinner than the thickness T2 of the oxidation suppression layer 51 covering the outer surface of the electromagnetic shielding member 32 exposed from the fixing member 34. For example, the thickness T2 of the oxidation suppression layer 51 is greater than the thickness T3 of the oxidation suppression layer 51 covering the outer surface of the cylindrical member 31 exposed from both the fixing member 34 and the electromagnetic shielding member 32.

[0063] The oxidation-suppressing layer 51 can be formed, for example, by setting the fixed portion by the fixing member 34 into the mold, pouring a curable material such as a silicone sealant into the mold, and allowing the curable material to solidify.

[0064] (Composition of oxidation suppression layer 52) As shown in Figure 2, the oxidation suppression layer 52 is formed to seal the portion fixed by the fixing member 35 between the electromagnetic shielding member 32 and the shield shell 33. The oxidation suppression layer 52 seals the portion fixed by the fixing member 35 so that it is isolated from the external space of the oxidation suppression layer 52. By sealing the portion fixed by the fixing member 35, the oxidation suppression layer 52 prevents the fixed portion from coming into contact with air (outside air), thereby suppressing oxidation of the electromagnetic shielding member 32, the shield shell 33, and the fixing member 35 at the fixed portion. The oxidation suppression layer 52 continuously covers the outer circumferential surface of the fixing member 35, the side surface of the fixing member 35, the outer circumferential surface of the electromagnetic shielding member 32 exposed from the fixing member 35, and the outer circumferential surface of the shield shell 33 exposed from the electromagnetic shielding member 32. Here, the side surface of the fixing member 35 is the axial end face of the fixing member 35. The oxidation suppression layer 52 is formed to extend, for example, along the axial direction of the shield shell 33. In other words, the longitudinal direction of the oxidation-suppressing layer 52 extends parallel to the axial direction of the shield shell 33.

[0065] The oxidation-inhibiting layer 52 tightly covers the entire outer surface of the fixing member 35. Specifically, the oxidation-inhibiting layer 52 tightly covers the outer surface of the fixing member 35 along its entire axial length. Furthermore, as shown in Figure 6, the oxidation-inhibiting layer 52 tightly covers the outer surface of the fixing member 35 along its entire circumference. The oxidation-inhibiting layer 52 covers the entire outer surface of the main body portion 35A of the fixing member 35, and also covers the entire outer surface of the fastening portion 35B of the fixing member 35.

[0066] The oxidation-suppressing layer 52 tightly covers the outer circumferential surface of the electromagnetic shielding member 32 over its entire circumference. The oxidation-suppressing layer 52 tightly covers the outer circumferential surface of the shield shell 33 over its entire circumference.

[0067] The oxidation suppression layer 52 is formed, for example, in a cylindrical shape overall. The oxidation suppression layer 52 has through holes 52X through which the shield shell 33 penetrates. The through holes 52X are formed to penetrate the oxidation suppression layer 52 in the longitudinal direction. The shape of the through holes 52X as viewed from the longitudinal direction of the oxidation suppression layer 52 is formed to conform to the outer surface of the shield shell 33. The shape of the through holes 52X as viewed from the longitudinal direction of the oxidation suppression layer 52 is formed to be oblong.

[0068] The cross-sectional shape along the outer circumferential surface of the oxidation-suppressing layer 52 can be any shape. The cross-sectional shape of the oxidation-suppressing layer 52 can be formed, for example, as a circular shape, polygonal shape, or flattened shape. The cross-sectional shape of the oxidation-suppressing layer 52 is formed to be different from the shape along the outer circumferential surface of the fixing member 35, for example. In this embodiment, the circular cross-section of the oxidation-suppressing layer 52 is formed to be rectangular. In this embodiment, the cross-sectional shape of the oxidation-suppressing layer 52 is formed to be rectangular in size that can enclose the entire fixing member 35. In this embodiment, the oxidation-suppressing layer 52 has different thicknesses in each part in the circumferential direction. The outer circumferential dimensions of the oxidation-suppressing layer 52 are constant along the entire length of the oxidation-suppressing layer 52, for example.

[0069] The oxidation-suppressing layer 52 can be formed, for example, by setting the fixed portion by the fixing member 35 into the mold, pouring a curable material such as a silicone sealant into the mold, and allowing the curable material to solidify.

[0070] (Configuration of protective member 61) As shown in Figure 3, the protective member 61 is provided, for example, in the longitudinal direction of the electric wire 20, away from the cylindrical member 31. The protective member 61 is provided, for example, to surround the outer circumference of the electric wire 20 drawn out from the cylindrical member 31. The protective member 61 is provided, for example, to surround the outer circumference of the electromagnetic shielding member 32. As shown in Figure 2, the protective member 61 is provided, for example, in the longitudinal direction of the electric wire 20, at a position between the cylindrical member 31 and the connector C1. The protective member 61 is, for example, a corrugated tube made of resin. The protective member 61 is, for example, more flexible than the cylindrical member 31.

[0071] (Configuration of waterproofing member 62) As the waterproofing member 62, for example, a heat-shrinkable tube or a rubber tube can be used. As the material for the heat-shrinkable tube, for example, a synthetic resin mainly composed of polyolefin resins such as cross-linked polyethylene or cross-linked polypropylene can be used. As the material for the rubber tube, for example, nitrile rubber, silicone rubber, urethane rubber, acrylic rubber, butyl rubber, or ethylene propylene rubber can be used. In this embodiment, the waterproofing member 62 is a rubber tube.

[0072] As shown in Figure 3, the waterproofing member 62 is provided, for example, so as to span between the cylindrical member 31 and the protective member 61. The waterproofing member 62 is provided, for example, so as to span between the outer circumference of the cylindrical member 31 exposed from the oxidation-inhibiting layer 51 and the outer circumference of the axial end of the protective member 61. The waterproofing member 62 is formed so as to surround the outer circumference of the oxidation-inhibiting layer 51.

[0073] The waterproof member 62 includes, for example, a main cylindrical portion 63 that surrounds the outer circumference of the oxidation-inhibiting layer 51, a first connecting cylindrical portion 64 connected to the first axial end of the main cylindrical portion 63, and a second connecting cylindrical portion 65 connected to the second axial end of the main cylindrical portion 63. The first connecting cylindrical portion 64 is connected to the outer circumferential surface of the cylindrical member 31. The second connecting cylindrical portion 65 is connected to the outer circumferential surface of the protective member 61. The waterproof member 62 is, for example, a single component in which the first connecting cylindrical portion 64, the main cylindrical portion 63, and the second connecting cylindrical portion 65 are continuously and integrally formed. In this embodiment, the main cylindrical portion 63, the first connecting cylindrical portion 64, and the second connecting cylindrical portion 65 have a continuous circumferential wall formed over the entire circumference in the circumferential direction, and are formed in an endless structure in which the start point and end point coincide. In other words, in this embodiment, the main cylindrical portion 63, the first connecting cylindrical portion 64, and the second connecting cylindrical portion 65 do not have slits that extend along the axial direction of the waterproof member 62.

[0074] The main cylindrical portion 63 is formed in a cylindrical shape with a size capable of accommodating the oxidation-inhibiting layer 51. The main cylindrical portion 63 is formed to surround the outer circumference of the oxidation-inhibiting layer 51 over its entire circumference. The inner circumferential surface of the main cylindrical portion 63 is formed in a shape corresponding to, for example, the outer circumferential surface of the oxidation-inhibiting layer 51. The inner circumferential surface of the main cylindrical portion 63 is not in contact with, for example, the outer circumferential surface of the oxidation-inhibiting layer 51. In other words, a gap is provided between the inner circumferential surface of the main cylindrical portion 63 and the outer circumferential surface of the oxidation-inhibiting layer 51. The inner circumferential dimension of the central part of the main cylindrical portion 63 is, for example, larger than the outer circumferential dimension of the oxidation-inhibiting layer 51.

[0075] The inner circumference of the first axial end of the main cylindrical portion 63 is formed to decrease as it approaches the first connecting cylindrical portion 64. The first end of the main cylindrical portion 63 has a portion whose inner circumference is smaller than, for example, the outer circumference of the oxidation-inhibiting layer 51. The inner surface of the first end of the main cylindrical portion 63 is formed to be engageable with, for example, the side surface of the oxidation-inhibiting layer 51 in the axial direction of the waterproofing member 62. The inner circumference of the second axial end of the main cylindrical portion 63 is formed to decrease as it approaches the second connecting cylindrical portion 65. The second end of the main cylindrical portion 63 has a portion whose inner circumference is smaller than, for example, the outer circumference of the oxidation-inhibiting layer 51. The inner surface of the second end of the main cylindrical portion 63 is formed to be engageable with, for example, the side surface of the oxidation-inhibiting layer 51 in the axial direction of the waterproofing member 62.

[0076] The first connecting cylindrical portion 64 is formed in a cylindrical shape that is sized to fit onto the outer circumference of the cylindrical member 31. In this embodiment, the first connecting cylindrical portion 64 is formed in a cylindrical shape. The inner circumference of the first connecting cylindrical portion 64 is smaller than, for example, the inner circumference of the main cylindrical portion 63. The inner circumference of the first connecting cylindrical portion 64 is smaller than, for example, the outer circumference of the oxidation-inhibiting layer 51. The first connecting cylindrical portion 64 is formed to be engageable with the side surface of the oxidation-inhibiting layer 51 in the axial direction of the waterproof member 62.

[0077] A fixing member 71 is provided on the outer circumferential surface of the first connecting cylindrical portion 64. The first connecting cylindrical portion 64 is tightened radially inward by the fixing member 71 and fixed to the outer circumferential surface of the cylindrical member 31. For example, the first connecting cylindrical portion 64 is tightened by the fixing member 71 until it is in a liquid-tight contact with the outer circumferential surface of the cylindrical member 31. This prevents liquids such as water from entering the inside of the waterproof member 62 from between the first connecting cylindrical portion 64 and the cylindrical member 31.

[0078] The second connecting cylinder portion 65 is formed in a cylindrical shape that is sized to fit onto the outer circumference of the protective member 61. In this embodiment, the second connecting cylinder portion 65 is formed in a cylindrical shape. The inner circumference of the second connecting cylinder portion 65 is smaller than, for example, the inner circumference of the main cylinder portion 63. The inner circumference of the second connecting cylinder portion 65 is smaller than, for example, the outer circumference of the oxidation-inhibiting layer 51. The second connecting cylinder portion 65 is formed to be engageable with the side surface of the oxidation-inhibiting layer 51 in the axial direction of the waterproof member 62.

[0079] A fixing member 72 is provided on the outer circumferential surface of the second connecting cylinder portion 65. The second connecting cylinder portion 65 is tightened radially inward by the fixing member 72 and fixed to the outer circumferential surface of the protective member 61. For example, the second connecting cylinder portion 65 is tightened by the fixing member 72 until it is in liquid-tight contact with the outer circumferential surface of the protective member 61. This prevents liquids such as water from entering the interior of the waterproof member 62 from between the second connecting cylinder portion 65 and the protective member 61.

[0080] Figures 2 to 7 illustrate the structure near connector C1 in the wire harness 10. Although not shown in the illustrations, the structure near connector C2 (see Figure 1) in the wire harness 10 is similar to the structure near connector C1.

[0081] Next, the effects and advantages of this embodiment will be explained. (1) The wire harness 10 comprises an electric wire 20, a conductive cylindrical member 31 through which the electric wire 20 passes, and a cylindrical electromagnetic shielding member 32 that surrounds the outer circumference of the electric wire 20 and is fixed to the end of the cylindrical member 31. The wire harness 10 also comprises an annular fixing member 34 that fixes the electromagnetic shielding member 32 to the end of the cylindrical member 31, and an oxidation suppression layer 51 that seals the fixing portion of the cylindrical member 31 and the electromagnetic shielding member 32 by the fixing member 34.

[0082] In this configuration, the fixing portion of the cylindrical member 31 and the electromagnetic shielding member 32 by the fixing member 34 is sealed by the oxidation suppression layer 51. This prevents the cylindrical member 31 and the electromagnetic shielding member 32 from coming into contact with air at the fixing portion, thereby preventing oxidation of the cylindrical member 31 and the electromagnetic shielding member 32 at the fixing portion. As a result, it is possible to suppress an increase in the electrical resistance value at the electrical connection portion between the cylindrical member 31 and the electromagnetic shielding member 32, and to suppress a decrease in the electromagnetic shielding performance of the wire harness 10.

[0083] (2) Furthermore, it is possible to suppress the intrusion of liquids such as water into the oxidation suppression layer 51. Therefore, even if the cylindrical member 31, the electromagnetic shielding member 32, and the fixing member 34 are made of different conductive materials, it is possible to effectively suppress the occurrence of electrolytic corrosion (collision corrosion between dissimilar metals) between the cylindrical member 31, the electromagnetic shielding member 32, and the fixing member 34. Thus, the degree of freedom in material selection for the cylindrical member 31, the electromagnetic shielding member 32, and the fixing member 34 can be improved.

[0084] (3) The oxidation suppression layer 51 is formed to span the fixing member 34, the electromagnetic shielding member 32, and the cylindrical member 31, and to continuously cover the outer circumferential surface of the fixing member 34, the outer circumferential surface of the electromagnetic shielding member 32, and the outer circumferential surface of the cylindrical member 31. This effectively suppresses contact between the cylindrical member 31 and the electromagnetic shielding member 32 with air in the fixing portion by the fixing member 34, thus effectively suppressing oxidation of the cylindrical member 31 and the electromagnetic shielding member 32 in the fixing portion. As a result, it effectively suppresses an increase in the electrical resistance value at the electrical connection portion between the cylindrical member 31 and the electromagnetic shielding member 32, and effectively suppresses a decrease in the electromagnetic shielding performance of the wire harness 10.

[0085] (4) The oxidation-suppressing layer 51 has heat resistance of 120°C or higher. Therefore, even if the wire harness 10 is exposed to a high-temperature environment of about 100°C to 115°C during heat cycle tests, etc., the oxidation-suppressing layer 51 can be suitably prevented from deteriorating. For example, even if the wire harness 10 is exposed to a high-temperature environment, the oxidation-suppressing layer 51 can be suitably prevented from deforming or melting. As a result, even if the wire harness 10 is exposed to a high-temperature environment, the sealing state of the fixing portion of the fixing member 34 by the oxidation-suppressing layer 51 can be maintained, and the oxidation of the cylindrical member 31 and the electromagnetic shielding member 32 in the fixing portion can be suitably prevented.

[0086] (5) The oxidation-suppressing layer 51 is made of a silicone sealing material with excellent heat resistance. This effectively prevents the oxidation-suppressing layer 51 from deforming or melting even when the wire harness 10 is exposed to a high-temperature environment.

[0087] (6) The electromagnetic shielding member 32 is a braided member having a mesh 42 formed by weaving together a plurality of metal wires 43. The oxidation suppression layer 51 is formed to cover the entire inner surface of the fixing member 34 and to fill the mesh 42 of the electromagnetic shielding member 32 in the portion that contacts the inner surface of the fixing member 34. This makes it possible to form the oxidation suppression layer 51 so as to fill the gap between the inner surface of the fixing member 34 and the outer surface of the cylindrical member 31. This makes it possible to suppress the mixing of foreign matter into the gap between the inner surface of the fixing member 34 and the outer surface of the cylindrical member 31, and to suppress the generation of unintended products in the gap between the inner surface of the fixing member 34 and the outer surface of the cylindrical member 31. Therefore, it is possible to suitably suppress an increase in the electrical resistance value at the electrical connection portion between the cylindrical member 31 and the electromagnetic shielding member 32 due to foreign matter or unintended products, and suitably suppress a decrease in the electromagnetic shielding performance of the wire harness 10.

[0088] (7) In the case of the fixed portion where the electromagnetic shielding member 32 is fixed to the outer surface of the cylindrical member 31 by the fixing member 34, a first stepped portion D1 is formed on the outer surface of the fixed portion by the fixing member 34, the side surface of the fixing member 34, and the outer surface of the electromagnetic shielding member 32. In addition, a second stepped portion D2 is formed on the outer surface of the fixed portion by the fixing member 34 by the outer surface of the electromagnetic shielding member 32 and the outer surface of the cylindrical member 31. In contrast, in the wire harness 10 of this embodiment, the outer circumference dimension of the oxidation suppression layer 51 is constant along the entire length of the oxidation suppression layer 51. As a result, steps corresponding to the first stepped portion D1 and the second stepped portion D2 can be eliminated from the outer surface of the oxidation suppression layer 51.

[0089] (8) The thickness T2 of the oxidation suppression layer 51 covering the outer surface of the electromagnetic shielding member 32 exposed from the fixing member 34 is greater than the thickness T1 of the oxidation suppression layer 51 covering the outer surface of the fixing member 34. This improves the cushioning properties of the oxidation suppression layer 51 in the portion covering the outer surface of the electromagnetic shielding member 32 exposed from the fixing member 34, thereby improving the protective performance of the oxidation suppression layer 51 in that portion.

[0090] (9) The waterproof member 62 attached to the outside of the oxidation-inhibiting layer 51 has a main cylindrical portion 63 that surrounds the outer circumference of the oxidation-inhibiting layer 51 over its entire circumference, and a first connecting cylindrical portion 64 that is formed integrally with the main cylindrical portion 63 and connected to the outer surface of the cylindrical member 31. The inner circumference of the main cylindrical portion 63 is formed to be greater than or equal to the outer circumference of the oxidation-inhibiting layer 51, and the inner circumference of the first connecting cylindrical portion 64 is formed to be smaller than the outer circumference of the oxidation-inhibiting layer 51. As a result, the oxidation-inhibiting layer 51 and the first connecting cylindrical portion 64 can engage with each other in the axial direction of the waterproof member 62. Therefore, when attaching the waterproof member 62 to the cylindrical member 31 and the oxidation-inhibiting layer 51, the positioning of the waterproof member 62 relative to the oxidation-inhibiting layer 51 can be easily performed.

[0091] (Other embodiments) The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0092] The structures of the oxidation-suppressing layers 51 and 52 in the above embodiment can be modified as appropriate. For example, the structure of the oxidation-suppressing layer 51 can be modified as appropriate if it has a structure that can seal the fixed portion of the cylindrical member 31 and the electromagnetic shielding member 32 with the fixing member 34. For example, the structure of the oxidation-suppressing layer 52 can be modified as appropriate if it has a structure that can seal the fixed portion of the shield shell 33 and the electromagnetic shielding member 32 with the fixing member 35.

[0093] For example, as shown in Figure 8, the outer surface of the oxidation-suppressing layer 51 may be formed in a stepped shape along the first stepped portion D1 and the second stepped portion D2. In this modified example, steps are formed on the outer surface of the oxidation-suppressing layer 51 at the location corresponding to the first stepped portion D1 and at the location corresponding to the second stepped portion D2. The thickness of the oxidation-suppressing layer 51 in this modified example is constant along the entire length of the oxidation-suppressing layer 51. Such an oxidation-suppressing layer 51 can be formed, for example, by applying a curable material such as a silicone sealant to the fixing portion by the fixing member 34 and solidifying the curable material. The structure of the oxidation-suppressing layer 52 can also be modified in the same way as the oxidation-suppressing layer 51 shown in Figure 8.

[0094] In this configuration, the outer surface of the oxidation-suppressing layer 51 is formed in a stepped shape along the first stepped portion D1 and the second stepped portion D2. As a result, compared to the case where the outer surface of the oxidation-suppressing layer 51 is formed in a non-stepped shape to absorb the step difference between the first stepped portion D1 and the second stepped portion D2, that is, when the outer dimensions of the oxidation-suppressing layer 51 are constant along the entire length of the oxidation-suppressing layer 51, there are fewer parts of the oxidation-suppressing layer 51 that are formed to be partially thicker. Therefore, the volume of the oxidation-suppressing layer 51 can be reduced. As a result, the material cost of the oxidation-suppressing layer 51 can be reduced.

[0095] In the above embodiment, a cylindrical waterproof member may be provided that surrounds the outer periphery of the oxidation-inhibiting layer 52. In this case, the waterproof member can have a structure similar to that of the waterproof member 62, for example.

[0096] The oxidation suppression layer 51 or 52 in the above embodiment may be omitted. The protective member 61 in the above embodiment may be omitted.

[0097] The waterproofing member 62 in the above embodiment may be omitted. In the above embodiment, the materials of the cylindrical member 31, the electromagnetic shielding member 32, and the shield shell 33 are not particularly limited. For example, the materials constituting the cylindrical member 31, the electromagnetic shielding member 32, and the shield shell 33 can be changed as appropriate, as long as they are conductive materials capable of performing an electromagnetic shielding function.

[0098] • As the cylindrical member 31 in the above embodiment, for example, a shield pipe may be used, which has a structure in which a conductive shield layer is laminated on the outer surface of a pipe body made of a non-metallic material (e.g., a resin material), or a shield pipe may be used, which has a structure in which a resin layer is further laminated on the outer surface of the shield layer. In the case of the latter shield pipe, the electromagnetic shield member 32 is connected to a seal layer that is exposed by peeling off a part of the outer resin layer.

[0099] The cylindrical member 31 may be omitted from the electromagnetic shielding component 30 in the above embodiment, and the portion that was covered by the cylindrical member 31 may be covered by the electromagnetic shielding component 32. In this case, the oxidation suppression layer 51 of the oxidation suppression layers 51 and 52 is omitted.

[0100] In the above embodiment, the electromagnetic shielding member 32 is embodied in a braided member, but it is not limited to this. For example, the electromagnetic shielding member 32 may be embodied in a metal foil. In the above embodiment, the wire harness 10 consists of two wires 20, but it is not limited to this. The number of wires 20 can be changed according to the specifications of the vehicle V. For example, the number of wires 20 may be one, or it may be three or more. For example, the wire harness 10 may be configured to include additional low-voltage wires that connect a low-voltage battery to various low-voltage devices (e.g., lamps, car audio).

[0101] In the above embodiment, the multiple in-vehicle devices to which the wire harness 10 is electrically connected are embodied in the high-voltage battery M1 and the inverter M2, but are not limited to these. The multiple in-vehicle devices to which the wire harness 10 is electrically connected are not particularly limited as long as they are electrical devices mounted on the vehicle V.

[0102] The arrangement of the high-voltage battery M1 and inverter M2 in vehicle V is not limited to the above embodiment and may be changed as appropriate depending on the configuration of vehicle V. The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims, not in the sense described above, and all modifications are intended to be in the sense and scope equivalent to the claims. [Explanation of Symbols]

[0103] 10 Wire Harnesses 20 Electric wire 21 core wires 22 Insulating coating 30 Electromagnetic Shielding Components 31 Cylindrical member 32 Electromagnetic shielding components 33 Shield shell (cylindrical member) 34,35 Fixing members 34A,35A Main body 34B, 35B fastening section 34X interior space 41 Wire bundle 42 mesh 43 Metal wire (wire strand) 51,52 Oxidation suppression layer 51X,52X through hole 61 Protective member 62 Waterproofing materials 63 Main body cylindrical section 64 First connecting cylinder section 65 Second connecting cylinder section 71 Fixing member 72 Fixing member C1, C2 connectors D1 First step section D2 2nd step part M1 High-Voltage Battery M2 Inverter T1, T2, T3 Thickness V Vehicle

Claims

1. Power lines and, A conductive cylindrical member through which the electric wire passes, A cylindrical electromagnetic shielding member surrounds the outer circumference of the electric wire and is fixed to the end of the cylindrical member, An annular fixing member for fixing the electromagnetic shielding member to the end of the cylindrical member, The system includes an oxidation-suppressing layer that seals the fixing portion of the cylindrical member and the electromagnetic shielding member by the fixing member, The oxidation-suppressing layer is formed to fill the gap between the inner surface of the fixing member and the outer surface of the cylindrical member in the wire harness.

2. The oxidation-suppressing layer continuously covers the outer circumferential surface of the fixing member, the side surface of the fixing member, the outer circumferential surface of the electromagnetic shielding member exposed from the fixing member, and the outer circumferential surface of the cylindrical member exposed from the electromagnetic shielding member. The oxidation-suppressing layer covers the entire outer surface of the fixing member in the circumferential direction. The oxidation-suppressing layer covers the outer surface of the electromagnetic shielding member over its entire circumference. The wire harness according to claim 1, wherein the oxidation-suppressing layer covers the outer surface of the cylindrical member over its entire circumference.

3. The wire harness according to claim 1, wherein the oxidation-suppressing layer has heat resistance of 120°C or higher.

4. The wire harness according to claim 3, wherein the oxidation-suppressing layer is composed of a silicone sealing material.

5. The electromagnetic shielding member is a braided member having a mesh structure and being made up of multiple conductive strands woven together. The oxidation-suppressing layer covers the entire inner surface of the fixing member. The wire harness according to claim 1, wherein the oxidation-suppressing layer fills the mesh in the electromagnetic shielding member in the portion that contacts the inner circumferential surface of the fixing member.

6. The oxidation-suppressing layer extends along the axial direction of the cylindrical member, The wire harness according to claim 1, wherein the outer circumference dimensions of the oxidation-suppressing layer are constant along the entire length of the oxidation-suppressing layer.

7. The wire harness according to claim 6, wherein the thickness of the oxidation-suppressing layer in the portion covering the outer circumferential surface of the electromagnetic shielding member exposed from the fixing member is greater than the thickness of the oxidation-suppressing layer in the portion covering the outer circumferential surface of the fixing member.

8. The oxidation-suppressing layer further comprises a cylindrical waterproof member that surrounds the outer periphery of the oxidation-suppressing layer. The waterproof member comprises a main cylindrical portion that surrounds the outer circumference of the oxidation-inhibiting layer over its entire circumference, and a first connecting cylindrical portion that is formed integrally with the main cylindrical portion and connected to the outer surface of the cylindrical member. The inner circumference of the main body cylindrical portion is greater than or equal to the outer circumference of the oxidation-suppressing layer. The wire harness according to claim 6, wherein the inner circumference dimension of the first connecting cylinder portion is smaller than the outer circumference dimension of the oxidation suppression layer.

9. The wire harness according to claim 1, wherein the outer surface of the oxidation suppression layer is formed in a stepped shape along a first stepped portion formed by the outer surface of the fixing member, the side surface of the fixing member, and the outer surface of the electromagnetic shielding member, and a second stepped portion formed by the outer surface of the electromagnetic shielding member and the outer surface of the cylindrical member.

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