Wire harnesses and wire harness systems

Abstract

The objective is to provide a wire harness that connects equipment while suppressing rotation around the axis. [Solution] The wire harness comprises an optical fiber cable having a three-layer structure including, in order from the center, optical fiber strands, a tensile strength material, and a sheath; a terminal processing member for the optical fiber cable; and a housing having a accommodating portion for the terminal processing member. The terminal processing member has an inner ring attached to the outer circumference of the end of the sheath; and a crimping ring having an inner circumferential surface that crimps both the inner ring and the sheath. The crimping ring has a first portion that crimps the end of the tensile strength material that reaches the outer circumferential surface of the inner ring through a slit formed in the sheath; and a second portion whose rotation around the axis is prevented by contact with the inner surface of the accommodating portion.

Description

Technical Field

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

Background Art

[0002] In vehicles such as automobiles, with the increase in in-vehicle devices mounted and the sophistication of information processing handled by the in-vehicle devices, the amount of information communication between the in-vehicle devices has been increasing. Further, with the electrification of vehicles, the electromagnetic noise inside the vehicle also tends to increase. An optical fiber cable can transmit a large amount of information at high speed compared to a metal wire such as copper. Also, since an optical fiber cable transmits information by light, it has high resistance to electromagnetic noise. Against this background, a wire harness using an optical fiber has come to be used as an information communication transmission path between in-vehicle devices, also called an ECU (Electronic Control Unit), mounted on a vehicle.

[0003] Patent Document 1 describes a structure for increasing the strength of an optical fiber cable. Specifically, an inner ring and an engagement member are combined with an optical fiber cable having a sheath and a tensile strength member. On the outer peripheral surface of the sheath, the tensile strength member is drawn out through a slit, and the inner ring is mounted at that position. The engagement member is coupled to the sheath, and the end of the tensile strength member is sandwiched between the inner ring and the engagement member, thereby increasing the strength of the cable.

Prior Art Documents

[0006] In view of the aforementioned conventional problems, this disclosure aims to provide a wire harness in which rotation around the axis is suppressed. [Means for solving the problem]

[0007] The wire harness according to the embodiment of the present disclosure comprises an optical fiber cable having a three-layer structure including, in order from the center, optical fiber strands, a tensile strength material, and a sheath; a terminal processing member for the optical fiber cable; and a housing having a housing portion for the terminal processing member, wherein the terminal processing member has an inner ring attached to the outer circumference of the end of the sheath, and a crimping ring having an inner circumferential surface that crimps both the inner ring and the sheath, and the crimping ring has a first portion that crimps the end of the tensile strength material that reaches the outer circumferential surface of the inner ring through a slit formed in the sheath, and a second portion whose rotation around the axis is prevented by contact with the inner surface of the housing portion. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a wire harness in which rotation around the axis is suppressed. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is an overview diagram showing an example of the wire harness according to Embodiment 1. [Figure 2] Figure 2 is a perspective view that enlarges the area A in Figure 1. [Figure 3A] Figure 3A is a cross-section of an optical fiber cable. [Figure 3B] Figure 3B shows a longitudinal section of an optical fiber cable. [Figure 4] Figure 4 is an exploded perspective view showing the configuration of the terminal processing member that processes the terminals. [Figure 5] Figure 5 is an explanatory diagram illustrating the process of attaching the terminal processing member. [Figure 6] Figure 6 is an outline view showing the external shape of the terminal processing member after crimping. [Figure 7] Figure 7 is an outline view showing the external shape of the terminal processing member after crimping. [Figure 8A] Figure 8A is a perspective view showing an overview of the housing. [Figure 8B] Figure 8B is a perspective view showing an overview of the first main body. [Figure 8C] Figure 8C is a perspective view showing an overview of the second main body. [Figure 9] This is a cross-sectional view of the housing from the position of DD in Figure 8A. [Figure 10] This is an explanatory diagram illustrating the arrangement of wire harnesses in a vehicle. [Figure 11] Figure 11 is an explanatory diagram illustrating a wire harness system according to Embodiment 2. [Modes for carrying out the invention]

[0010] <Summary of the embodiments of this disclosure> The embodiments of this disclosure are outlined below.

[0011] (1) The wire harness according to an embodiment of the present disclosure is a wire harness including an optical fiber cable having at least a three-layer structure including an optical fiber strand, a tensile strength member, and a sheath in order from the center, a terminal processing member of the optical fiber cable, and a housing having a housing portion for housing the terminal processing member, wherein the terminal processing member has an inner ring attached to the outer periphery of the end of the sheath and a caulking ring having an inner peripheral surface that crimps both the inner ring and the sheath, and the caulking ring has a first portion that crimps an end portion of the tensile strength member that reaches the outer peripheral surface of the inner ring through a slit formed in the sheath, and a second portion that is prevented from rotating around the axis by contact with the inner surface of the housing portion.

[0012] Since the second portion of the caulking ring contacts the inner surface of the housing portion of the housing and rotation around the axis is prevented, a wire harness with suppressed rotation around the axis can be provided.

[0013] (2) In the above (1), the inner surface of the housing portion may have a flat portion, and the outer peripheral surface of the second portion may include a flat surface whose rotation is prevented by the flat portion.

[0014] By the flat portion and the flat surface contacting each other, the position of the caulking ring with respect to the housing is determined, and the caulking ring is fixed to a specific position, so that rotation around the axis is suppressed.

[0015] (3) In the above (1) or (2), the outer peripheral shape of the inner ring may be circular, and the inner diameter of the first portion of the caulking ring may be larger than the outer diameter of the inner ring.

[0016] Thereby, the caulking ring can apply a force uniformly toward the inner ring. As a result, the caulking ring can uniformly grip the tensile strength member between the caulking ring and the inner ring.

[0017] (4) In (2) or (3) above, the housing portion of the housing comprises a first body included in the housing and a second body fitted into the first body, and the flat portions of the first body and the second body may be positioned to be in contact with two flat surfaces that are in symmetrical positions.

[0018] As a result, the flat portion of the housing sandwiches the flat surface of the crimping ring from both sides, so that even if there is a gap between the flat portion of the housing and the flat surface of the crimping ring, the housing can suppress rotation around the axis of the optical fiber cable.

[0019] (5) In any one of (1) to (4) above, the outer diameter of the first portion may be greater than the maximum diameter of the second portion, and the housing portion may have a recess that fits with the first portion.

[0020] As a result, the first part fits into the recess, and the housing can restrict the axial movement of the optical fiber cable.

[0021] (6) The wire harness system according to the embodiment of the present disclosure comprises a first in-vehicle device, a second in-vehicle device, and one of the wire harnesses described in (1) to (5) above for communication between the first in-vehicle device and the second in-vehicle device, wherein the first in-vehicle device is positioned at a different height and horizontal position from the second in-vehicle device.

[0022] This allows the first and second on-board devices to be connected and communicated with each other using a wire harness that suppresses rotation around the axis.

[0023] [Details of the embodiments of this disclosure] The embodiments of this disclosure will be described in detail below with reference to the drawings. At least some of the embodiments described below may be combined in any way.

[0024] <Embodiment 1> [1-1 Overall Configuration of Wire Harness] Figure 1 is an overview diagram showing an example of the wire harness according to Embodiment 1. Figure 2 is a perspective view showing an enlarged view of area A in Figure 1. The wire harness 1 will be described based on Figures 1 and 2. The wire harness 1 comprises an optical fiber cable 2, a terminal processing member 3 for the optical fiber cable 2, and a housing 4 having a housing portion 5 for the terminal processing member 3. The housing 4 is inserted into a receptacle of an in-vehicle device, which will be described later. When the housing 4 is inserted into the receptacle, the optical fiber strands located in the housing portion 5 are coupled with an optical transceiver located in the in-vehicle device. As a result, the wire harness 1 connects the in-vehicle devices in a way that enables communication between them.

[0025] In Figure 2, the longitudinal direction of the housing 4, towards the side into which the optical fiber cable 2 is inserted, is defined as the Y1 direction, and the opposite direction is defined as the Y2 direction. The short direction of the housing 4, towards the left, is defined as the X1 direction, and the direction towards the right is defined as the X2 direction. The thickness direction of the housing 4, towards the upward direction, is defined as the Z1 direction, and towards the downward direction is defined as the Z2 direction. The same applies to Figures 8A to 8C and Figure 9.

[0026] [1-2 Details of each component] [1-2-1 Fiber Optic Cable] Figure 3A is a cross-section of the optical fiber cable 2. Figure 3B is a longitudinal section of the optical fiber cable 2. The optical fiber cable 2 has at least a three-layer structure, consisting of optical fiber strands 31, a tensile strength material 32, and a sheath 33, in that order from the center outwards. The optical fiber cable 2 may contain two or more optical fiber strands 31.

[0027] <Optical fiber strands> The optical fiber strand 31 is made of, for example, quartz glass and includes a core and cladding from the center outwards. The diameter of the core is, for example, 50 μm. The diameter of the cladding is, for example, 150 μm. The core has a higher refractive index than the cladding. As a result, light incident on the core from the first end of the optical fiber strand 31 is guided to the second end of the optical fiber strand 31 while undergoing total internal reflection at the interface between the core and cladding.

[0028] <Tensile strength material> The tensile strength material 32 covers the outer circumference of the optical fiber strand 31. The tensile strength material 32 protects the optical fiber strand 31 from tension and bending applied to the optical fiber cable 2. The tensile strength material 32 supports the longitudinal tensile stress applied when the optical fiber cable 2 is pulled, on behalf of the optical fiber strand 31. The material of the tensile strength material 32 is a high-tensile strength material, such as aramid fiber.

[0029] <Sheath> The sheath 33 covers the outer circumference of the tensile strength material 32. The sheath 33 protects the optical fiber strands 31 from physical shocks and prevents them from being affected by the external environment, such as moisture. The material of the sheath 33 can be any material that can withstand external shocks and block the external environment, such as polypropylene.

[0030] [1-2-2 Terminal Processing Components] Figure 4 is an exploded perspective view showing the configuration of the terminal processing member 3 that processes the end of the fiber optic cable. The terminal processing member 3 is located at the end of the fiber optic cable 2 and processes the end of the fiber optic cable 2. The terminal processing member 3 has an inner ring 41 and a crimping ring 42.

[0031] <Inner ring> The inner ring 41 is fitted around the outer circumference of the end of the sheath 33. The inner ring 41 has an annular shape. The inner ring 41 has an inner diameter through which the optical fiber cable 2 can pass, for example, 3 mm. The outer circumference of the inner ring 41 is circular, for example, with an outer diameter of 4 mm. When the crimping ring 42 is crimped and the tensile strength material 32 is compressed, the inner ring functions as a base member that supports the compression. Because the outer circumference of the inner ring 41 is circular, the crimping ring can apply force uniformly toward the inner ring. As a result, the crimping ring can uniformly grip the tensile strength material between itself and the inner ring.

[0032] The inner ring 41 has an axial length sufficient to grip the crimped tensile strength material 32. For example, the axial length of the inner ring 41 is 3 mm. The inner ring may be made of any material that has sufficient strength to support the crimping and function as a base material, such as brass. The surface of the inner ring 41 may be plated for rust prevention.

[0033] <crimping> The crimping ring 42 crimps both the inner ring 41 and the sheath 33 with its inner circumferential surface 42c. As a result, the terminal processing member 3 is fixed to the end of the optical fiber cable 2, and the tensile strength material 32, which is crimped between the inner ring 41 and the crimping member 32, is also fixed to the end of the optical fiber cable 2. The crimping ring 42 is made of a material suitable for crimping, such as aluminum. The crimping ring 42 has a first portion 42a and a second portion 42b connected to the first portion 42a.

[0034] The first part 42a has an annular shape. The inner diameter of the first part 42a is larger than the outer diameter of the inner ring 41. This allows the first part 42a to position the inner ring 41 on its inner circumference. In addition, the inner circumference of the first part 42a can have a gap between it and the outer circumference of the inner ring 41. This allows the first part 42a to position the tensile strength material 32 in this gap. When the first part 42a is crimped, it undergoes plastic deformation and presses the tensile strength material 32 that has reached the outer circumferential surface 41a of the inner ring 41. Since the first part 42a presses the tensile strength material 32 between itself and the inner ring, it has the same axial length as the inner ring 41.

[0035] The second part 42b is pressed against the sheath 33 and its rotation around its axis is prevented by contact with the inner surface of the housing 4, which will be described later. The outer circumferential surface of the second part 42b includes a flat surface 42d. The cross-section of the second part 42b is, for example, hexagonal. The sides of the hexagon are the flat surfaces 42d. The axial length of the second part 42b is the length required for the crimping ring 42 pressed against the sheath 33 to be fixed, for example, 3 mm. When the second part 42b is crimped, it undergoes plastic deformation and is pressed against the sheath 33. The second part 42b has different external shapes before and after the crimping ring is crimped. Before crimping, the second part 42b has a cylindrical external shape. After crimping, the second part 42b has, for example, a hexagonal prism external shape.

[0036] <Processing steps for terminal processing components> Figure 5 is an explanatory diagram illustrating the process of attaching the terminal processing member. Figures 5A to 5D are explanatory diagrams illustrating the first to fourth steps of attaching the terminal processing member 3 to the end of the optical fiber cable 2, respectively.

[0037] Figure 5A shows the first step. In the first step, the crimping ring 42 is first inserted into the optical fiber cable 2. Then, the sheath of the optical fiber cable 2 is removed by a tool or device for processing the end of the optical fiber cable 2, the tensile strength material 32 is cut to a predetermined length, and a slit 33a is formed.

[0038] Figure 5B shows the second step. In the second step, the tensile strength material 32 is passed through a slit 33a formed in the sheath 33 and pulled out radially through the optical fiber cable 2.

[0039] Figure 5C shows the third step. In the third step, the inner ring 41 is fitted onto the outer circumference of the end of the sheath 33.

[0040] Figure 5D shows the fourth step. In the fourth step, the crimping ring 42 is moved toward the inner ring located at the end of the sheath 33. As the crimping ring 42 moves, the tensile strength material 32 is positioned to reach the outer surface of the inner ring 41. The crimping ring 42 is then crimped to both the inner ring 41 and the sheath 33 by a crimping tool or crimping device.

[0041] Figure 6 is an outline view showing the external shape of the terminal processing member after crimping. Figure 6 shows the wire harness 1 including the terminal processing member 3 after crimping. Figure 6A is a front view. Figure 6B is a right side view. Figure 6C is a rear view. Figure 6D is a top view. The left side view is the same as the right side view and is therefore omitted. The bottom view is the same as the top view and is therefore omitted. Figure 6E is a cross-sectional view at BB in Figure 6B. In all figures, the optical fiber cable 2 is shown by a dashed line. As shown in Figure 6E, since the sheath 33 is made of a synthetic resin such as polypropylene, the sheath 33 deforms to match the shape of the inside of the crimped second portion 42b.

[0042] Figure 7 is an outline view of a wire harness 1 including a crimped terminal processing member 3, in a different example from Figure 6. Figure 7A is a front view. Figure 7B is a right side view. Figure 7C is a rear view. Figure 7D is a top view. The left side view is the same as the right side view and is therefore omitted. The bottom view is the same as the top view and is therefore omitted. Figure 7E is a cross-sectional view at CC in Figure 7B. In all figures, the optical fiber cable 2 is indicated by a dashed line. The cross-section of the second part 42b in Figure 7E is deformed from a hexagon compared to the cross-section of the second part 42b in Figure 6E. The second part is crimped and plastically deformed when the mold of the crimping tool or crimping device is pressed against it. Therefore, the cross-sectional shape of the second part 42b is similar to the shape of the mold to which the second part 42b contacts, but differs from the shape of the mold. The cross-section of the second part 42b in Figure 7E is one example.

[0043] [1-2-3 Housing] Figure 8A is a perspective view showing an overview of the housing 4. The housing 4 has a box shape and includes a first body 81 and a second body 82 that fits into the first body. In Figure 8A, the second body 82 is shown in perspective. Figure 8B is a perspective view showing an overview of the first body 81. Figure 8C is a perspective view showing an overview of the second body 82. The housing 4 is formed by the first body 81 and the second body 82 fitting together like a bivalve shell. Note that the internal configuration of the housing 4 differs depending on the application, so the configuration of the end of the housing section 5 in the Y2 direction is omitted in Figures 8B and 8C. Depending on the application of the housing 4, the housing 4 may have a configuration in this part for that application.

[0044] The housing 4 has a front wall 84 in the Y1 direction, a rear wall in the Y2 direction, a left wall in the X1 direction, a right wall in the X2 direction, a top wall in the Z1 direction, and a bottom wall in the Z2 direction. The optical fiber cable 2 is inserted into the housing 4 from the front wall 84. The housing 4 has a coupling portion on the rear wall for coupling with the optical transceiver of the vehicle-mounted device.

[0045] The housing 4 has a housing section 5 for accommodating the terminal processing member 3. As shown in Figure 8A, the housing section 5 is located inside the front wall 84 into which the optical fiber cable 2 enters the housing 4. When the first body 81 and the second body 82 are fitted together, a space is formed between the first body 81 and the second body 82, and this space corresponds to the housing section 5. The terminal processing member 3 is placed within the formed space.

[0046] As shown in Figures 8B and 8C, the inner surface of the housing portion 5 of the housing 4 has a flat portion 85. The normal direction of the flat portion 85 of the first body 81 is the Z1 direction. The normal direction of the flat portion 85 of the second body 82 is the Z2 direction. The flat portion 85 is located inside the front wall 84 into which the optical fiber cable 2 enters the housing 4, and is adjacent to the front wall 84.

[0047] Figure 9 is a cross-sectional view of the housing that accommodates the terminal processing member 3, as seen from the position DD in Figure 8A. Figure 9 shows a cross-section of the housing 4 and a cross-section of the second portion 42b of the crimping ring 42. The inner surface of the housing 5 is positioned to contact the second portion 42b. Specifically, the flat portions 85, 85 on the inner surface of the housing 5 are positioned such that the distance d2 from the flat portion 85 of the first body 81 to the flat portion 85 of the second body 82 is smaller than the maximum diameter d1 of the second portion 42b. As a result, even if the optical fiber cable 2 tries to rotate around its axis, the second portion 42b contacts the inner surface of the housing 5, preventing rotation around the axis.

[0048] Furthermore, the inner surface of the housing portion 5 has a flat portion 85, and the outer circumferential surface of the second portion 42b may include a flat surface 42d whose rotation is prevented by the flat portion 85. The contact between the flat portion 85 and the flat surface 42d determines the position of the crimping ring 42 relative to the housing 4, and the crimping ring 42 is fixed in a specific position, thereby suppressing rotation around the axis.

[0049] The housing portion 5 of the housing 4 has a first body 81 included in the housing 4 and a second body 82 that fits into the first body 81. The flat portions 85, 85 of the housing portion 5 of the first body 81 and the housing portion 5 of the second body 82 may be positioned to be in contact with two flat surfaces 42d that are in symmetrical positions. Since the flat portion 85 of the housing 4 sandwiches the flat surface 42d of the crimping ring 42 in contact with it from both sides, the housing can suppress rotation around its axis even if there is a gap between the flat portion 85 of the housing 4 and the flat surface of the crimping ring.

[0050] Although the cross-sectional shape of the second part 42b was explained using the example of a hexagon, the cross-sectional shape of the second part 42b may be a polygon such as a quadrilateral or octagon, or an ellipse. In any case, the second part 42b is in contact with the inner surface of the housing 5, preventing rotation around its axis.

[0051] As shown in Figures 8B and 8C, the housing portion 5 has a recess 86. The recess 86 is located adjacent to the flat portion 85 in the Y2 direction. When the first body 81 and the second body 82 are fitted together, the first portion 42a of the crimping ring 42 fits into the recess 86. The length of the recess 86 in the Y2 direction is longer than the length of the first portion 42a in the Y2 direction. This allows the first portion 42a to fit into the recess 86 in the Y2 direction. Also, the outer diameter d3 of the first portion 42a is larger than the maximum diameter d1 of the second portion 42b. This prevents the second portion 42b from obstructing the fitting of the first portion 42a into the recess 86. Furthermore, as shown in Figure 9, when the first body 81 and the second body 82 are fitted together, the recess 86 has a depth that allows the first portion 42a to be accommodated. As described above, when the first body 81 and the second body 82 are fitted together, the housing 4 can house a portion of the first part 42a in the recesses 86, 86 of the first body 81 and the second body 82, respectively. As a result, even when a force is applied to the optical fiber cable 2 in the direction of pulling it out of the housing 4, i.e., in the Y1 direction, the housing 4 can restrict the axial movement of the optical fiber cable 2.

[0052] Furthermore, a portion of the recess 86 may open to the outside of the housing 4. That is, a portion of the first portion 42a may be exposed through the opening. This makes it possible to reduce the thickness of the housing 4 in the Z1 and Z2 directions. As a result, when the wire harness is inserted into the receptacle of the in-vehicle device, the spacing between the receptacles becomes narrower, and the density of wire harnesses connected to the in-vehicle device can be increased.

[0053] <Embodiment 2> [2-1 Wire Harness System] Figure 10 is an explanatory diagram illustrating the arrangement of a wire harness in a vehicle. Figure 11 is an explanatory diagram illustrating a wire harness system according to Embodiment 2. As shown in Figure 10, in a vehicle 101, the wire harness 1 and the on-board device 102 are housed in areas other than the passenger compartment, such as the doors, ceiling, and under the floor. These spaces are narrow. Therefore, the wire harness 1 and the on-board device 102 are arranged to conform to the shape of these limited spaces. As a result, if the wire harness 1 is composed of optical fiber cables 2, a force may be applied to the optical fiber cables 2 that tends to rotate them around their axis. Furthermore, as the vehicle moves, it is constantly subjected to vibrations of varying magnitudes. These vibrations may cause an additional force to be applied to the optical fiber that tends to rotate it around its axis.

[0054] Figure 11 is a diagram showing the wire harness and two on-board devices from Figure 10, separated, to illustrate the wire harness system according to this disclosure. As shown in Figure 11, the wire harness system 110 comprises a first on-board device 111, a second on-board device 112, and a wire harness 1. The wire harness 1 connects the first on-board device 111 and the second on-board device 112 in a communicative manner. The first on-board device 111 is positioned at a different height and horizontal position than the second on-board device 112. This is a schematic representation of the first on-board device 111 and the second on-board device 112 being positioned to fit the shape of a limited space. When the first on-board device 111 is positioned at a different height and horizontal position than the second on-board device 112, the optical fiber cable 2 is twisted and subjected to a force that causes it to rotate around its axis. Furthermore, the housing 4 of the wire harness 1 may be rotated around its axis to match the orientation of the receptacle on the in-vehicle device and connected to the receptacle. In addition, vibrations of the vehicle can cause a force to be applied to the optical fiber cable 2 that tends to rotate it around its axis. Consequently, the wire harness 1, including the optical fiber cable 2, mounted on the vehicle is subjected to various forces that tend to rotate it around its axis. As a result, the wire harness 1, which connects in-vehicle devices in a communication-enabled manner, may experience communication failures.

[0055] In the wire harness 1 according to this disclosure, rotation around the axis is prevented by the second portion 42b of the crimping ring 42 contacting the inner surface of the housing portion 5 of the housing 4. As a result, the wire harness system 110 can reduce the risk of communication failure.

[0056] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is not limited to the embodiments described above, and includes all modifications within the scope equivalent to the configurations described in the claims. [Explanation of Symbols]

[0057] 1. Wire harness 2. Fiber optic cable 3 End processing member 4 Housing 5 Housing section 31 Optical fiber strands 32 Tensile material 33 Sheath 33a Slit 41 Inner ring 41a Outer surface 42 Crimping ring 42a 1st part 42b 2nd part 42c Inner surface 42d Flat surface 81 First main body 82 Second main body 85 Flat area 84 Front wall 86 Recess 101 Vehicle 102 In-vehicle equipment 110 Wire harness system 111 1st onboard device 112 2nd onboard device

Claims

1. An optical fiber cable having at least a three-layer structure including, in order from the center outwards, optical fiber strands, tensile strength material, and sheath, The terminal processing member of the optical fiber cable, A wire harness comprising a housing having a portion for accommodating the terminal processing member, The terminal processing member is An inner ring is fitted around the outer circumference of the end of the sheath, It comprises a crimping ring having an inner circumferential surface that is pressed against both the inner ring and the sheath, The aforementioned crimping ring is A first portion that crimps the end of the tensile strength material that reaches the outer circumferential surface of the inner ring through a slit formed in the sheath, A wire harness having a second portion whose rotation around its axis is prevented by contact with the inner surface of the housing portion.

2. The inner surface of the aforementioned housing has a flat portion, The outer surface of the second portion is The wire harness according to claim 1, further comprising a flat surface whose rotation is prevented by the aforementioned flat portion.

3. The outer circumference of the inner ring is circular. The wire harness according to claim 1 or claim 2, wherein the inner diameter of the first portion of the crimping ring is larger than the outer diameter of the inner ring.

4. The housing portion of the housing comprises a first body included in the housing and a second body that fits into the first body. The flat portions of the first body and the second body are positioned so as to be able to contact the two flat surfaces which are in symmetrical positions. The wire harness according to claim 2.

5. The outer diameter of the first portion is larger than the maximum diameter of the second portion. The wire harness according to claim 1, wherein the housing portion has a recess that engages with the first portion.

6. The first in-vehicle device and The second in-vehicle device, A wire harness according to claim 1 that enables communication between the first in-vehicle device and the second in-vehicle device, A wire harness system comprising, The first in-vehicle device is positioned at a different height and horizontal position from the second in-vehicle device. Wire harness system.

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