Wire harness

Abstract

To provide a wiring harness whose structure can be simplified.SOLUTION: A wiring harness (10) comprises: a shield wire (20) which has a core wire (24), an inner insulation coating (25) covering an outer circumference of the core wire, a shield member (22) covering an outer circumference of the inner insulation coating, and an outer insulation coating (23) covering an outer circumference of the shield member; and a metal pipe (31) through which the core wire and the inner insulation coating are inserted, and to which the shield member is connected. The shield member has a connecting part (22a) which is connected to an outer circumferential surface of the metal pipe while being covered with the outer insulation coating. The outer insulation coating has an adhesion part (23a) which further extends from the connecting part and is adhered to the outer circumferential surface of the metal pipe over the entire circumference.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Conventionally, there has been a wire harness that includes an electric wire having a core wire and an insulating coating covering the outer periphery of the core wire, a metal pipe through which the electric wire passes, and a waterproofing member such as a rubber stopper interposed between the electric wire and the metal pipe (see, for example, Patent Document 1). In such a wire harness, the rubber stopper can waterproof the interior of the metal pipe. There is also a wire harness that includes a shielding member made of a braided wire or the like covering the outer periphery of the electric wire, and an outer insulating coating covering the outer periphery of the shielding member. For example, the shielding member may have an end portion exposed from the outer insulating coating and fixed to the outer periphery of the metal pipe by a crimping member. In such a wire harness, the connection portion between the shielding member and the metal pipe is covered with a waterproofing member, such as a cylindrical rubber boot. Both ends of the rubber boot are fixed with cable ties while covering the connection portion. This suppresses electromagnetic wave radiation from the core wire and waterproofs the shielding member and the interior of the metal pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-97585 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described wire harness, a rubber boot is required to waterproof the inside of the shielding member and the metal pipe. Therefore, there is a demand for a simplified structure of the wire harness.

[0005] An object of the present disclosure is to provide a wire harness that allows for a simplified configuration. [Means for solving the problem]

[0006] The wire harness of the present disclosure is a wire harness including a shielded wire having a core wire, an inner insulating coating covering the outer periphery of the core wire, a shielding member covering the outer periphery of the inner insulating coating, and an outer insulating coating covering the outer periphery of the shielding member, and a metal pipe through which the core wire and the inner insulating coating pass and to which the shielding member is connected, wherein the shielding member has a connection portion that is connected to the outer peripheral surface of the metal pipe while being covered by the outer insulating coating, and the outer insulating coating has a contact portion that extends further from the connection portion and is in close contact with the outer peripheral surface of the metal pipe around its entire circumference. [Effects of the Invention]

[0007] According to the wire harness of the present disclosure, the configuration can be simplified. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a partial perspective view of a wire harness according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of a housing of an electrical device and a wire harness according to an embodiment. [Figure 3] FIG. 3 is a partially exploded perspective view of the wire harness according to the embodiment. [Figure 4] FIG. 4 is an exploded perspective view of a connector according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The wire harness of the present disclosure includes: [1] A wire harness comprising: a shielded wire having a core wire, an inner insulating coating covering the outer periphery of the core wire, a shielding member covering the outer periphery of the inner insulating coating, and an outer insulating coating covering the outer periphery of the shielding member; and a metal pipe through which the core wire and the inner insulating coating pass and to which the shielding member is connected, wherein the shielding member has a connection portion that is connected to the outer periphery of the metal pipe while being covered by the outer insulating coating, and the outer insulating coating has a contact portion that extends further from the connection portion and is in close contact with the outer periphery of the metal pipe.

[0010] According to this configuration, the outer insulating coating can waterproof the connection portion of the shielding member and the inside of the metal pipe. Specifically, the contact portion of the outer insulating coating that extends from the connection portion is in close contact with the outer surface of the metal pipe, preventing liquid from penetrating the connection portion and the inside of the metal pipe from outside the contact portion. Therefore, rubber boots or the like are not required, and the wire harness can be simply configured.

[0011] [2] In the above item [1], it is preferable to provide a crimping member for crimping and fixing the contact portion to the metal pipe. According to this configuration, the contact portion is fixed to the metal pipe by crimping using the crimping member, so that the contact portion can be easily and firmly attached to the metal pipe.

[0012] [3] In the above [2], it is preferable that the crimping member has a first crimping portion that crimps and fixes the adhesion portion to the metal pipe, and a second crimping portion that crimps and fixes the connection portion together with the outer insulating coating to the metal pipe.

[0013] According to this configuration, the contact portion is crimped and fixed to the metal pipe by the first crimping portion of the crimping member. The connection portion is crimped and fixed to the metal pipe together with the outer insulating coating by the second crimping portion of the crimping member. This configuration allows the connection portion to be easily and firmly electrically connected to the metal pipe. Furthermore, this configuration allows the number of parts to be reduced compared to when the first crimping portion and the second crimping portion are crimped and fixed as separate parts.

[0014] [4] In any one of [1] to [3] above, it is preferable that the metal pipe constitutes a connector together with a metal fixing member that is fixed to the outer surface of the metal pipe and fixed to an attachment object.

[0015] This configuration simplifies the structure of the wire harness while providing a connector. That is, the metal pipe and the metal fixing member are manufactured separately and then fixed to each other to form the connector, so each can be easily obtained. Furthermore, since no resin molded parts are required and no molds are required, the connector can be easily manufactured.

[0016] [5] In the above item [4], it is preferable that the metal fixing member is made of a plate material. According to this configuration, the metal fixing member can be manufactured more easily than a casting.

[0017] [6] In the above [4] or [5], it is preferable that the metal fixing member has a pipe fixing hole, and the metal pipe has an expanded portion that is connected to the inner surface of the pipe fixing hole.

[0018] According to this configuration, the metal pipe can be expanded before being joined to the inner surface of the pipe fixing hole, making the fixing operation easier than welding. [7] In any one of the above items [4] to [6], it is preferable that a rubber ring is provided to be fitted onto the metal pipe.

[0019] According to this configuration, by interposing a rubber ring between the outer circumferential surface of the metal pipe and the object to be attached, it is possible to waterproof that portion. [8] In the above item [7], it is preferable that the metal pipe has a narrowed portion onto which the rubber ring is fitted.

[0020] According to this configuration, displacement of the rubber ring along the length of the metal pipe is suppressed. [Details of the embodiments of the present disclosure] Specific examples of the wire harness of the present disclosure will be described below with reference to the drawings. In each drawing, for convenience of explanation, some of the configuration may be exaggerated or simplified. Furthermore, the dimensional ratios of each part may differ between drawings. In this specification, "parallel," "orthogonal," and "circular" do not only refer to strictly parallel, orthogonal, or circular, but also include approximately parallel, orthogonal, or circular within the scope of the effects of this embodiment. 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 equivalent to the claims.

[0021] (Configuration of wire harness 10) As shown in FIG. 1, the wire harness 10 includes a shielded electric wire 20 and a connector 30.

[0022] (Configuration of shielded wire 20) 1 to 3, the shielded electric wire 20 is a core shielded electric wire having an electric wire 21, a shielding member 22, and an outer insulating coating 23. The wire harness 10 of this embodiment has two shielded electric wires 20.

[0023] The electric wire 21 has a core wire 24 and an inner insulating coating 25 that covers the outer periphery of the core wire 24. The core wire 24 in this embodiment has a circular cross-sectional shape. The inner insulating coating 25 has an annular cross-sectional shape.

[0024] The shielding member 22 covers the outer periphery of the inner insulating coating 25. The shielding member 22 is, for example, a braided wire in which conductive wires such as copper alloy or aluminum alloy are braided into a cylindrical shape. Note that the shielding member 22 may be made of other materials such as metal foil as long as it can suppress radiation of electromagnetic waves.

[0025] The outer insulating coating 23 covers the outer periphery of the shielding member 22. The outer insulating coating 23 has a circular cross section. Ends of the electric wires 21 protrude outward from the ends of the shielding member 22 and the outer insulating coating 23.

[0026] (Configuration of connector 30) As shown in FIG. 2, the connector 30 is fixed to an end of the shielded electric wire 20, and is also fixed to a housing 50 of an electric device to which it is attached.

[0027] 1 to 4, the connector 30 includes a metal pipe 31 and a metal fixing member 32 fixed to the outer circumferential surface of the metal pipe 31. The connector 30 of this embodiment is compatible with two shielded electric wires 20 and includes two metal pipes 31.

[0028] (Configuration of metal fixing member 32) The metal fixing member 32 is made of a plate material. Specifically, the metal fixing member 32 is made by punching a metal plate material.

[0029] As shown in FIG. 4, the metal fixing member 32 has a rectangular main body 32a when viewed in the thickness direction, and fixing portions 32b protruding in the short direction from both longitudinal ends of the main body 32a. The metal fixing member 32 has pipe fixing holes 32c penetrating in the thickness direction. Two pipe fixing holes 32c are formed in the main body 32a. The two pipe fixing holes 32c are arranged side by side along the longitudinal direction of the main body 32a. The inner surfaces of the pipe fixing holes 32c are preferably subjected to a textured finish such as knurling. The metal fixing member 32 also has connector mounting holes 32d penetrating in the thickness direction. The connector mounting holes 32d are formed in each of the two fixing portions 32b.

[0030] (Configuration of metal pipe 31) The metal pipe 31 is made of a pipe material. Specifically, the metal pipe 31 is made by subjecting a metal pipe material with a fixed diameter to a pipe expansion process to widen the diameter or a pipe reduction process to reduce the diameter.

[0031] As shown in FIG. 2, the metal pipe 31 has an expanded portion 31a that is joined to the inner surface of the pipe fixing hole 32c. The expanded portion 31a is a portion of the metal pipe 31 that has a larger diameter than adjacent portions in the longitudinal direction. The expanded portion 31a is provided in the middle of the metal pipe 31. When the expanded portion 31a is formed by pipe expansion, the expanded portion 31a is pressed against the inner surface of the pipe fixing hole 32c and joined, thereby fixing the metal pipe 31 to the metal fixing member 32. In other words, the metal pipe 31 is expanded in the pipe fixing hole 32c to form the expanded portion 31a, thereby fixing the metal fixing member 32 to the metal pipe 31.

[0032] 3 and 4, the metal fixing member 32 is fixed to the plurality of metal pipes 31 so that the axes Z of the plurality of metal pipes 31 are parallel to each other. Note that Fig. 4 is not an exploded perspective view of the metal pipe 31 and the metal fixing member 32 before they are fixed to each other, but shows the metal pipe 31 having the expanded portion 31a in a state where the metal pipe 31 and the metal fixing member 32 have been fixed to each other and then disassembled again.

[0033] The metal pipe 31 also has a tube-reduced portion 31b. The tube-reduced portion 31b is a portion of the metal pipe 31 whose diameter is smaller than that of an adjacent portion in the longitudinal direction. The tube-reduced portion 31b is provided closer to the tip end of the metal pipe 31 than the tube-expanded portion 31a. More specifically, the metal pipe 31 has a first end portion 31c disposed closer to the tip end of the wire harness 10, and a second end portion 31d disposed closer to the middle portion of the wire harness 10. The tube-reduced portion 31b is provided closer to the first end portion 31c than the tube-expanded portion 31a.

[0034] The connector 30 includes a rubber ring 33 fitted onto the metal pipe 31. The rubber ring 33 is fitted onto the tube-reducing portion 31b. In addition, in the metal pipe 31, the portion between the expanded portion 31a and the second end portion 31d is a base portion 31e that is not subjected to expansion or contraction processing, and the diameter of the pipe material that constitutes the metal pipe 31 is maintained as it is.

[0035] (Fixing structure of shielded wire 20 and connector 30) 2, the electric wire 21 is passed through a metal pipe 31. In other words, the core wire 24 and the inner insulating coating 25 penetrate the metal pipe 31.

[0036] The shielding member 22 has a connection portion 22a that is connected to the outer peripheral surface of the metal pipe 31 while being covered with the outer insulating coating 23. More specifically, the end portion of the shielding member 22 in the extending direction is the connection portion 22a that is connected to the outer peripheral surface of the metal pipe 31 while covering the outer peripheral surface of the metal pipe 31 while being covered with the outer insulating coating 23. In this embodiment, the connection portion 22a is connected to the outer peripheral surface of the base portion 31e of the metal pipe 31.

[0037] The outer insulating coating 23 has a contact portion 23a that extends further from the connection portion 22a and whose entire circumference is in close contact with the outer circumferential surface of the metal pipe 31. More specifically, the end of the outer insulating coating 23 in the extending direction is the contact portion 23a that extends further in the extending direction from the portion covering the connection portion 22a and whose entire circumference is in direct contact with the outer circumferential surface of the metal pipe 31. The contact portion 23a in this embodiment is in close contact with the outer circumferential surface of the base portion 31e of the metal pipe 31. Note that the shielded electric wire 20 is assembled to the connector 30, for example, by passing the electric wire 21 through the metal pipe 31 with the outer insulating coating 23 turned up, and then returning the outer insulating coating 23 to its original state. Of course, the shielded electric wire 20 may be assembled to the connector 30 by any procedure, such as by using a jig.

[0038] The wire harness 10 also includes a crimping member 34 that crimps and fixes the contact portion 23a to the metal pipe 31. The crimping member 34 is a metal crimping ring formed in an annular shape. 2, the crimping member 34 has a first crimping portion 34a and a second crimping portion 34b. The first crimping portion 34a crimps and fixes the contact portion 23a to the metal pipe 31. In other words, the first crimping portion 34a crimps and fixes the contact portion 23a to the metal pipe 31 as a base. The first crimping portion 34a tightly fits the contact portion 23a around the entire circumference of the metal pipe 31 so that liquid cannot penetrate inside the outer insulating coating 23.

[0039] The second crimping portion 34b crimps and fixes the connecting portion 22a together with the outer insulating coating 23 to the metal pipe 31. In other words, the second crimping portion 34b crimps and fixes the connecting portion 22a together with the outer insulating coating 23, using the metal pipe 31 as a base. The second crimping portion 34b tightly contacts the connecting portion 22a with the metal pipe 31 so that the connecting portion 22a is electrically connected stably to the metal pipe 31. Note that FIG. 3 is not an exploded perspective view of the crimping member 34 before it is fixed to the connector 30, but rather shows the crimping member 34 and other components in a state where they have been fixed to the connector 30 and then disassembled again.

[0040] An end of the core wire 24 protrudes from the first end 31c of the metal pipe 31 and is exposed from the inner insulating coating 25. A terminal 35 is fixed to the end of the core wire 24 by crimping.

[0041] (Configuration of the housing 50 of the electrical device and the fixing structure of the connector 30) 2, the housing 50 of the electrical device to which the connector 30 is to be attached includes a mounting hole 50a and a fastening portion 50b. The housing 50 of the electrical device is made of metal. The connector 30 is fixed to the housing 50 of the electrical device so that the terminal 35 and the first end 31c of the metal pipe 31 are inserted into the mounting hole 50a.

[0042] With the first end 31c of the metal pipe 31 inserted into the mounting hole 50a, the rubber ring 33 is interposed in a compressed state between the outer circumferential surface of the metal pipe 31 and the inner circumferential surface of the mounting hole 50a. The connector 30 is fixed to the housing 50 of the electrical device by a bolt 36 that passes through the connector mounting hole 32d and is screwed into the fastening portion 50b. This electrically connects the shield member 22 to the housing 50 of the electrical device via the connector 30. With the connector 30 fixed to the housing 50 of the electrical device, a terminal (not shown) of the electrical device is connected to the terminal 35.

[0043] Next, the operation of the wire harness 10 configured as above will be described. In the shielded electric wire 20, the shielding member 22 covers the inner insulating coating 25 of the electric wire 21. Therefore, radiation of electromagnetic waves from the core wire 24 in the portion covered by the shielding member 22 is suppressed. Furthermore, when the connector 30 is fixed to the housing 50 of the electric device, the shielding member 22 is electrically connected to the housing 50 of the electric device. In the connector 30, the electric wire 21 is covered by the metal pipe 31. Therefore, radiation of electromagnetic waves from the core wire 24 in the portion of the connector 30 is suppressed. Furthermore, the contact portion 23a at the end of the outer insulating coating 23 extends further in the extension direction from the portion covering the connection portion 22a of the shielding member 22, and its entire circumference is contacted with the outer peripheral surface of the metal pipe 31. Therefore, liquid cannot penetrate inside the outer insulating coating 23, and the connection portion 22a and the inside of the metal pipe 31 are waterproofed.

[0044] Next, the effects of the above embodiment will be described below. (1) The outer insulating coating 23 can waterproof the connection portion 22a of the shielding member 22 and the inside of the metal pipe 31. More specifically, the contact portion 23a of the outer insulating coating 23, which is a portion extending further from the connection portion 22a, is in close contact with the outer peripheral surface of the metal pipe 31, so that liquid is prevented from penetrating from the outside of the contact portion 23a toward the connection portion 22a and the inside of the metal pipe 31. Therefore, a rubber boot or the like is not required, and the wire harness 10 can have a simple configuration.

[0045] (2) The contact portion 23a of the outer insulating coating 23 is fixed to the metal pipe 31 by crimping with the crimping member 34. Therefore, the contact portion 23a can be easily and firmly brought into contact with the metal pipe 31.

[0046] (3) The crimping member 34 has a first crimping portion 34a and a second crimping portion 34b. The contact portion 23a is crimped and fixed to the metal pipe 31 by the first crimping portion 34a. The connecting portion 22a is crimped and fixed to the metal pipe 31 together with the outer insulating coating 23 by the second crimping portion 34b. This makes it possible to easily and firmly electrically connect the connecting portion 22a to the metal pipe 31. This also reduces the number of parts compared to when the first crimping portion 34a and the second crimping portion 34b are crimped and fixed as separate members.

[0047] (4) The metal pipe 31, together with the metal fixing member 32 fixed to the outer peripheral surface of the metal pipe 31, constitutes the connector 30. Therefore, the configuration of the wire harness 10 can be simplified while including the connector 30. That is, the metal pipe 31 and the metal fixing member 32 are each manufactured separately and then fixed to each other to constitute the connector 30, so each can be easily obtained. Furthermore, since the connector 30 does not include a resin molded product and does not require a mold, the connector 30 can be easily manufactured.

[0048] (5) The metal fixing member 32 is made of a plate material. Therefore, the metal fixing member 32 can be manufactured more easily than, for example, a casting. (6) The metal pipe 31 has an expanded portion 31a that is joined to the inner surface of the pipe fixing hole 32c, and can be joined to the inner surface of the pipe fixing hole 32c by expanding the metal pipe 31. Therefore, the fixing work is easier than, for example, welding.

[0049] (7) The connector 30 includes a rubber ring 33 fitted onto the metal pipe 31. Therefore, by interposing the rubber ring 33 between the outer circumferential surface of the metal pipe 31 and the inner circumferential surface of the mounting hole 50a in the housing 50 of the electrical device, the relevant portion can be waterproofed. The rubber ring 33 does not require a special shape and can be made simple, and can be assembled simply by fitting it onto the metal pipe 31, making it easy to manufacture the connector 30.

[0050] (8) The metal pipe 31 has a reduced diameter portion 31b on which the rubber ring 33 is fitted, thereby preventing the rubber ring 33 from shifting in position along the length of the metal pipe 31. This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0051] In the above embodiment, the contact portion 23a of the outer insulating coating 23 is fixed to the metal pipe 31 by crimping with the crimping member 34, but other configurations are possible as long as the contact portion 23a is in close contact with the outer peripheral surface of the metal pipe 31. For example, the contact portion 23a may be in close contact with the outer peripheral surface of the metal pipe 31 by a separate member other than the crimping member 34, an adhesive, or the like.

[0052] In the above embodiment, the crimping member 34 has the first crimping portion 34a and the second crimping portion 34b, but this is not limited thereto, and for example, the first crimping portion 34a and the second crimping portion 34b may be separate members. Also, the connecting portion 22a of the shielding member 22 is crimped and fixed to the metal pipe 31 together with the outer insulating coating 23 by the second crimping portion 34b, but other configurations may be used as long as they are connected to the outer peripheral surface of the metal pipe 31.

[0053] In the above embodiment, the metal pipe 31 and the metal fixing member 32 constitute the connector 30, but the present invention is not limited to this and the metal pipe 31 may be used for other purposes. For example, the metal pipe 31 may be used to regulate the path of the wire harness 10 passing under the floor of a vehicle. In other words, the present invention may be embodied as a wire harness in which the metal pipe 31 is used as a path regulating member without including the metal fixing member 32.

[0054] In the above embodiment, the metal fixing member 32 is made of a plate material, but is not limited to this and may be, for example, a cast product formed using a mold. Also, while the metal fixing member 32 is made by punching a metal plate material, it may be made of a plate material and subjected to other processing such as bending.

[0055] In the above embodiment, the metal pipe 31 has the expanded portion 31a that is connected to the inner surface of the pipe fixing hole 32c, but this is not limited thereto, and the metal pipe 31 may have no expanded portion 31a. For example, the metal pipe and the metal fixing member may be fixed by welding.

[0056] In the above embodiment, the connector 30 includes the rubber ring 33 fitted onto the metal pipe 31, but this is not limitative and the connector 30 may not include the rubber ring 33. For example, instead of the rubber ring 33, a sealing member may be fixed to the metal fixing member 32 by adhesive or the like.

[0057] In the above embodiment, the metal pipe 31 has the narrowed portion 31b on which the rubber ring 33 is fitted, but this is not limitative and the metal pipe 31 may have no narrowed portion 31b. In the above embodiment, the wire harness 10 has two shielded electric wires 20, and the connector 30 has two metal pipes 31. However, this is not limited to this, and the numbers of the shielded electric wires 20 and the metal pipes 31 may be changed to other numbers. [Explanation of symbols]

[0058] 10 Wire harness 20 Shielded wire 21 Electric wire 22 Shielding material 22a Connection 23 Outer insulating coating 23a Contact area 24 core wire 25 Inner insulation coating 30 connectors 31 Metal Pipe 31a Expanded tube part 31b Constriction section 31c 1st end 31d 2nd end 31e Base 32 Metal fixing member 32a Main body 32b Fixed part 32c Pipe fixing hole 32d Connector mounting hole 33 Rubber ring 34 Caulking material 34a First crimping part 34b Second crimping part 35 terminals 36 volts 50 Electrical equipment housing (mounting object) 50a Mounting hole 50b Fastening section Z axis

Claims

1. a shielded wire having a core wire, an inner insulating coating covering the outer periphery of the core wire, a shielding member covering the outer periphery of the inner insulating coating, and an outer insulating coating covering the outer periphery of the shielding member; a metal pipe through which the core wire and the inner insulating coating pass and to which the shielding member is connected, the shielding member has a connection portion that is connected to the outer peripheral surface of the metal pipe while being covered with the outer insulating coating, The outer insulating coating has a contact portion that extends further from the connection portion and whose entire periphery is in close contact with the outer circumferential surface of the metal pipe. Wire harness.

2. a crimping member for crimping and fixing the contact portion to the metal pipe; The wire harness according to claim 1 .

3. The crimping member is a first crimping portion that crimps and fixes the contact portion to the metal pipe; a second crimping portion that crimps and fixes the connection portion together with the outer insulating coating to the metal pipe, The wire harness according to claim 2 .

4. The metal pipe constitutes a connector together with a metal fixing member that is fixed to the outer circumferential surface of the metal pipe and fixed to an attachment object. The wire harness according to claim 1 .

5. The metal fixing member is made of a plate material. The wire harness according to claim 4.

6. The metal fixing member has a pipe fixing hole, the metal pipe has an expanded portion that is connected to the inner surface of the pipe fixing hole; The wire harness according to claim 4.

7. A rubber ring is provided which is fitted onto the metal pipe. The wire harness according to claim 4.

8. The metal pipe has a reduced pipe portion onto which the rubber ring is fitted. The wire harness according to claim 7.

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