Wire harness and wire harness system

Abstract

A wire harness (1) comprises: an optical fiber cable (2) that has an at least three-layer structure which includes a bare optical fiber (31), a tensile material (32), and a sheath (33), in the stated order starting from the center; a terminal processing member (3) of optical fiber cable; and a housing (4) that has an accommodation part (5) for the terminal processing member. The terminal processing member has an inner ring (41) which is installed to the outer circumference of an end part of the sheath and a crimp ring (42) that has an inner circumferential surface which crimps both the inner ring and the sheath. The crimp ring has a first portion (42a) that crimps an end part of the tensile material which passes through a slit (33a) formed in the sheath and which reaches the outer circumferential surface of the inner ring, and a second portion (42b) that prevents rotation about the axis caused by contact with an inner surface of the accommodation part.

Description

Wire harness and wire harness system

[0001] The present disclosure relates to a wire harness and a wire harness system. This application claims priority based on Japanese Application No. 2025-9096 filed on January 22, 2025, and incorporates all the descriptions described in the above Japanese application.

[0002] In vehicles such as automobiles, with the increase in in-vehicle devices mounted and the sophistication of information processing handled by in-vehicle devices, the information communication volume between in-vehicle devices is increasing. Furthermore, with the electrification of vehicles, 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 metal wires 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 ECUs (Electronic Control Units), mounted on vehicles.

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

[0004] International Publication No. 2012 / 033057

[0005] 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.

[0006] Figure 1 is an overview view showing an example of the overall appearance of a wire harness according to Embodiment 1. Figure 2 is a perspective view enlarged from area A in Figure 1. Figure 3A is a cross-section of an optical fiber cable. Figure 3B is a longitudinal section of an optical fiber cable. Figure 4 is an exploded perspective view showing the configuration of a terminal processing member for processing the ends. Figure 5 is an explanatory diagram illustrating the process of attaching the terminal processing member. Figure 6 is an outline view showing the outer shape of the terminal processing member after crimping. Figure 7 is an outline view showing the outer shape of the terminal processing member after crimping. Figure 8A is a perspective view showing the overall appearance of the housing. Figure 8B is a perspective view showing the overall appearance of the first main body. Figure 8C is a perspective view showing the overall appearance of the second main body. This is a cross-sectional view of the housing viewed from position D-D in Figure 8A. This 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.

[0007] [Problems to be Solved by the Invention] Onboard devices and wire harnesses connecting them are housed in areas other than the passenger compartment, such as doors, ceilings, and under the floor. Because these spaces are narrow, the wire harnesses and onboard devices are arranged to fit the shape of the limited space. As a result, if the wire harness is made of optical fiber cables, a force may be applied that causes the optical fiber cables to rotate around their axis. Furthermore, the vehicle is subjected to vibration as it travels. This vibration may cause the wire harness, including the optical fiber connecting the onboard devices, to rotate around its axis. The optical fiber cable described in Patent Document 1 does not take into account rotation around the axis, so there is a risk that the optical fiber cable will rotate around its axis. If the optical fiber cable rotates around its axis, there is a risk of communication failure.

[0008] In view of the aforementioned conventional problems, this disclosure aims to provide a wire harness in which rotation around the axis is suppressed.

[0009] [Effects of Disclosure] According to this disclosure, it is possible to provide a wire harness in which rotation around the axis is suppressed.

[0010] <Outline of Embodiments of the Disclosure> The embodiments of the disclosure are outlined below.

[0011] (1) 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 comprises an inner ring mounted on 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 comprises 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.

[0012] Since the second portion of the crimping ring contacts the inner surface of the housing, preventing rotation around the axis, it is possible to provide a wire harness in which rotation around the axis is suppressed.

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

[0014] When the flat portion and the flat surface come into contact, the position of the crimping ring relative to the housing is determined, and the crimping ring is fixed in a specific position, thus suppressing rotation around the axis.

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

[0016] This allows the crimping ring to apply force uniformly toward the inner ring. As a result, the crimping ring can uniformly grip the tensile material between itself and the inner ring.

[0017] (4) In (2) 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 portion 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 which the first in-vehicle device and the second in-vehicle device are connected in a communicative manner, 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 on-board device and the second on-board device to be connected and communicated with each other using a wire harness that suppresses rotation around the axis.

[0023] [Details of Embodiments of the Disclosure] Details of embodiments of the disclosure will be described 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 overview of a wire harness according to Embodiment 1. Figure 2 is a perspective view enlarged to show 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 toward 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 toward the left is defined as the X1 direction, and the direction toward the right is defined as the X2 direction. The thickness direction of the housing 4 toward the upward is defined as the Z1 direction, and 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 Configuration] [1-2-1 Optical Fiber 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, including optical fiber strands 31, a tensile strength material 32, and a sheath 33, in order from the center outwards. The optical fiber cable 2 may include two or more optical fiber strands 31.

[0027] <Optical Fiber Strand> The optical fiber strand 31 is made of, for example, quartz glass and includes a core and cladding from the center outward. 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 the cladding.

[0028] <Tensile Strengthening Material> The tensile strengthening material 32 covers the outer circumference of the optical fiber strand 31. The tensile strengthening material 32 protects the optical fiber strand 31 from tension and bending applied to the optical fiber cable 2. The tensile strengthening 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 strengthening 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, for example, polypropylene.

[0030] [1-2-2 Terminal Processing Member] Figure 4 is an exploded perspective view showing the configuration of the terminal processing member 3 that processes the terminal. The terminal processing member 3 is located at the end of the optical fiber cable 2 and processes the terminal of the optical fiber 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 Ring> 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, 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 portion 42a has an annular shape. The inner diameter of the first portion 42a is larger than the outer diameter of the inner ring 41. This allows the first portion 42a to position the inner ring 41 on its inner circumference. In addition, the inner circumference of the first portion 42a can have a gap between it and the outer circumference of the inner ring 41. This allows the first portion 42a to position the tensile strength material 32 in this gap. When the first portion 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 portion 42a presses the tensile strength material 32 against the inner ring, it has the same axial length as the inner ring 41.

[0035] The second portion 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 portion 42b includes a flat surface 42d. The cross-section of the second portion 42b is, for example, hexagonal. The sides of the hexagon are the flat surfaces 42d. The axial length of the second portion 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 portion 42b is crimped, it undergoes plastic deformation and is pressed against the sheath 33. The second portion 42b has different external shapes before and after the crimping ring is crimped. Before crimping, the second portion 42b has a cylindrical external shape. After crimping, the second portion 42b has, for example, a hexagonal prism external shape.

[0036] <Processing steps for terminal processing members> Figure 5 is an explanatory diagram illustrating the process of attaching terminal processing members. 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 attached to 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. Then, the crimping ring 42 is pressed against 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 a 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 taken along B-B 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 taken along C-C in Figure 7B. In all figures, the optical fiber cable 2 is shown by a dashed line. The cross-section of the second portion 42b in Figure 7E is deformed from a hexagon compared to the cross-section of the second portion 42b in Figure 6E. The second portion 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 portion 42b is similar to the shape of the mold to which the second portion 42b contacts, but differs from the shape of the mold. The cross-section of the second portion 42b in Figure 7E is one example.

[0043] 〔1-2-3 HOUSING〕 FIG. 8A is a perspective view showing an overview of the housing 4. The housing 4 has a box shape and includes a first main body 81 and a second main body 82 fitted into the first main body. In FIG. 8A, the second main body 82 is shown in a perspective view. FIG. 8B is a perspective view showing an overview of the first main body 81. FIG. 8C is a perspective view showing an overview of the second main body 82. The housing 4 is formed by fitting the first main body 81 and the second main body 82 together like a clam shell. Note that since the internal configuration of the housing 4 varies depending on the application, the description of the configuration at the front in the Y2 direction of the accommodating portion 5 is omitted in FIGS. 8B and 8C. Depending on the application of the housing 4, the housing 4 may have a configuration for that application at this portion.

[0044] The housing 4 has a front wall 84 in the Y1 direction, a rear wall in the Y2 direction, a left side wall in the X1 direction, a right side wall in the X2 direction, an upper wall in the Z1 direction, and a lower 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 for coupling to the optical transceiver of the in-vehicle device on the rear wall.

[0045] The housing 4 has an accommodating portion 5 for accommodating the terminal processing member 3. As shown in FIG. 8A, the accommodating portion 5 is located inside the front wall 84 where the optical fiber cable 2 enters the housing 4. When the first main body 81 and the second main body 82 are fitted together, a space surrounded by the first main body 81 and the second main body 82 is formed, and this space corresponds to the accommodating portion 5. The terminal processing member 3 is arranged in the formed space.

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

[0047] Figure 9 is a cross-sectional view of the housing that houses the terminal processing member 3 as viewed from the position of D-D in FIG. 8A. FIG. 9 shows the cross-section of the housing 4 and the cross-section of the second portion 42b of the caulking ring 42. The inner surface of the housing portion 5 is disposed at a position that contacts the second portion 42b. Specifically, the flat portions 85, 85 that are the inner surfaces of the housing portion 5 are disposed at a position where the distance d2 from the flat portion 85 of the first main body 81 to the flat portion 85 of the second main body 82 is smaller than the maximum diameter d1 of the second portion 42b. Thereby, even if the optical fiber cable 2 attempts to rotate around the axis, the second portion 42b contacts the inner surface of the housing portion 5, and rotation around the axis is prevented.

[0048] Further, the inner surface of the housing portion 5 may have a flat portion 85, and the outer peripheral surface of the second portion 42b may include a flat surface 42d whose rotation is blocked by the flat portion 85. When the flat portion 85 and the flat surface 42d come into contact, the position of the caulking ring 42 with respect to the housing 4 is determined, and the caulking ring 42 is fixed to a specific position, so rotation around the axis is suppressed.

[0049] The housing portion 5 of the housing 4 is possessed by the first main body 81 included in the housing 4 and the second main body 82 that fits into the first main body 81, and the flat portions 85, 85 each possessed by the housing portion 5 of the first main body 81 and the housing portion 5 of the second main body 82 may be disposed at positions where they can contact two flat surfaces 42d that are symmetric with respect to a plane. Since the flat portion 85 of the housing 4 sandwiches the flat surface 42d of the caulking ring 42 so that contact is possible from both sides, even if there is a gap between the flat portion 85 of the housing 4 and the flat surface of the caulking ring, the housing can suppress rotation around the axis.

[0050] Incidentally, although the shape of the cross-section of the second portion 42b has been described by way of an example in which it is hexagonal, the shape of the cross-section of the second portion 42b may be a polygon such as a quadrilateral or an octagon, or an ellipse. In any case, the second portion 42b contacts the inner surface of the housing portion 5, and rotation around the axis is prevented.

[0051] As shown in Figures 8B and 8C, the housing portion 5 has a recess 86. The recess 86 is provided at a position adjacent to the flat portion 85 in the Y2 direction. When the first body 81 and the second body 82 are mated, the first portion 42a of the crimping ring 42 is mated with 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 be mated with 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 mating of the first portion 42a with the recess 86. Furthermore, as shown in Figure 9, when the first body 81 and the second body 82 are mated, 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 the wire harness system according to Embodiment 2. As shown in Figure 10, in the vehicle 101, the wire harness 1 and the on-board device 102 are housed in areas other than the space where passengers sit, such as the doors, ceiling, and under the floor. The spaces such as the doors, ceiling, and under the floor are narrow. Therefore, the wire harness 1 and the on-board device 102 are arranged to conform to the shape of the limited space. As a result, when 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 in the direction of their axis. Furthermore, as the vehicle moves, it is constantly subjected to vibrations of varying magnitudes. Due to these vibrations, there is a risk that a force will be applied to the optical fiber that tends to rotate it further 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 direction 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 in all respects and are not restrictive. The scope of the present invention is not limited to the embodiments described above and includes all modifications within the scope of equivalence to the configurations described in the claims.

[0057] 1 Wire harness 2 Optical fiber cable 3 Terminal processing member 4 Housing 5 Housing section 31 Optical fiber strand 32 Tensile material 33 Sheath 33a Slit 41 Inner ring 41a Outer surface 42 Crimping ring 42a First part 42b Second part 42c Inner surface 42d Flat surface 81 First body 82 Second body 85 Flat section 84 Front wall 86 Recess 101 Vehicle 102 On-board device 110 Wire harness system 111 First on-board device 112 Second on-board device

Claims

1. A wire harness comprising: an optical fiber cable having a three-layer structure including, in order from the center outwards, 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 comprises: an inner ring mounted on 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 comprises: 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.

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

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

4. The wire harness according to claim 2, wherein 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 are positioned to be in contact with two flat surfaces located in symmetrical positions.

5. The wire harness according to any one of claims 1 to 4, wherein the outer diameter of the first portion is greater than the maximum diameter of the second portion, and the housing portion has a recess that engages with the first portion.

6. A wire harness system comprising: a first in-vehicle device; a second in-vehicle device; and a wire harness according to any one of claims 1 to 5 for communicating 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.

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