Wire harness assembly

Abstract

To simplify a configuration of a wire harness capable of protecting a round electric wire group.SOLUTION: A wire harness assembly 1 includes a flat cable 3 and a round electric wire group 6. The round electric wire group 6 is made up of a plurality of round electric wires 7. The round electric wire group 6 is disposed on one side in a thickness direction of the flat cable 3. A longitudinal direction of the flat cable 3 is approximately parallel to a longitudinal direction of the round electric wires 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A wire harness assembly is disclosed in, for example, Patent Document 1.

[0003] The wiring structure of an automotive wiring harness disclosed in Patent Document 1 includes a group of insulated round electric wires. This wiring harness includes a band-shaped, flexible flat cable made of a flat conductive material covered with an insulating material. In the region where the wiring harness is routed three-dimensionally, a flat cable is spirally wound around the outer surface of the group of insulated round electric wires. This allows the flat cable to be used as an exterior material for bundling the group of insulated round electric wires, and also allows the flat cable itself to be routed three-dimensionally. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-049784 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned Patent Document 1, a flat cable is spirally wound around a group of insulated round electric wires, which results in an excessively long flat cable compared to the length of the path, resulting in increased costs.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to simplify the structure of a wire harness capable of protecting a group of round electric wires.

[0007] The problem to be solved by the present invention is as described above. Next, the means for solving this problem and the effects thereof will be explained.

[0008] According to an aspect of the present invention, there is provided a wire harness assembly having the following configuration. That is, the wire harness assembly includes a flat cable and a group of round electric wires. The group of round electric wires is made up of a plurality of round electric wires. The group of round electric wires is arranged on one side in the thickness direction of the flat cable. The longitudinal direction of the flat cable is approximately parallel to the longitudinal direction of the round electric wires.

[0009] This allows a wire harness assembly in which the flat cable also functions as an exterior sheathing to be obtained using a shorter flat cable length than conventional methods, thereby reducing costs. Furthermore, because the longitudinal direction of the flat cable and the longitudinal direction of the round electric wires are substantially parallel, the process of arranging the flat cable along the group of round electric wires is simplified. This simplifies the assembly process for the wire harness assembly and makes it more suitable for automation using robots.

[0010] In the above-described wire harness assembly, the flat cables are preferably arranged in pairs so as to face each other with the group of round electric wires therebetween.

[0011] This allows for protection over a wide area around the group of round electric wires. Furthermore, even if the number of round electric wires constituting the group of round electric wires increases, this can be absorbed by increasing the distance between the pair of flat cables. This allows for greater flexibility in the number of round electric wires, making it easy to accommodate an increase in the number of electric wires due to specification changes, etc.

[0012] The wire harness assembly preferably includes a flat cable fixing portion for fixing the flat cable to the group of round electric wires.

[0013] This allows the flat cable to be fixed in place so that its position relative to the group of round electric wires does not shift.

[0014] The wire harness assembly preferably has the following configuration: the flat cables are arranged in pairs so as to face each other across the group of round electric wires, and the flat cable fixing portion is arranged on the outer periphery of the pair of flat cables.

[0015] This allows a plurality of flat cables arranged in pairs to be fixed to the group of round electric wires at once, thereby simplifying the configuration.

[0016] The wire harness assembly preferably has the following configuration: the flat cable fixing portion includes a band portion and an anchor portion, the band portion is wound around the outside of the flat cable, and the anchor portion can be hooked into a hole for fixing.

[0017] This allows the wire harness assembly to be fixed to an appropriate member with a simple structure.

[0018] The wire harness assembly preferably has the following configuration: the flat cables are arranged in pairs facing each other with the group of round electric wires therebetween, and the wire harness assembly includes a branch portion where the group of round electric wires extends in a direction different from the longitudinal direction of the flat cables from between the pair of flat cables.

[0019] This makes it possible to realize a branched wire harness with a simple configuration.

[0020] The wire harness assembly is preferably configured as follows: the branch portion is configured so that a branch wire branches off from a longitudinal midpoint of the trunk wire, the trunk wire includes the flat cable, and the branch wire is configured from the round electric wire.

[0021] By configuring the branch wires so that they do not include a flat cable, the degree of freedom in circuit design can be increased compared to when a flat cable with multiple wires already attached is used as the branch wire, and therefore circuit designs that require variation can be flexibly accommodated.

[0022] The wire harness assembly is preferably configured as follows: The wire harness assembly is used in a vehicle, and the conductors of the flat cable form a common electric circuit among a plurality of different vehicle models, among a plurality of model numbers of the same vehicle model with different specifications, or among a plurality of different grades of the same vehicle model.

[0023] This reduces the number of design steps and allows the advantages of compact flat cables to be utilized in multiple variations.

[0024] In the wire harness assembly, it is preferable that flat cable fixing portions for fixing the flat cable to the group of round electric wires are arranged on both sides of a starting end portion of the branch wires extending in a different direction from the trunk wire.

[0025] This allows the shape of the branched portion to be well maintained. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a perspective view showing an overall configuration of a wire harness assembly according to a first embodiment of the present invention. [Figure 2] Cross section AA of Figure 1. [Figure 3] FIG. 6 is a cross-sectional view showing a wire harness assembly according to a second embodiment. [Figure 4] FIG. 10 is a cross-sectional view showing a wire harness assembly according to a third embodiment. [Figure 5] FIG. 10 is a perspective view showing a wire harness assembly according to a fourth embodiment. [Figure 6] FIG. 10 is a perspective view showing a wire harness assembly according to a fifth embodiment. [Figure 7] 13 is a perspective view illustrating an operation of fixing a flat cable to a group of round electric wires by a fixing member in the wire harness assembly of the sixth embodiment. FIG. [Figure 8] FIG. 13 is a cross-sectional view showing a wire harness assembly according to a seventh embodiment. [Figure 9] FIG. 13 is a perspective view showing a wire harness assembly according to an eighth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an overall view showing the overall configuration of a wire harness assembly 1. Fig. 2 is a cross-sectional view taken along the line AA in Fig. 1. In Fig. 1, in order to conveniently show the configuration of a flat cable 3 and a round electric wire 7 in detail, the wire harness is shown cut and a longitudinal intermediate portion is taken out.

[0028] A wire harness assembly 1 according to a first embodiment shown in Figs. 1 and 2 is installed in, for example, a passenger vehicle and electrically connected to on-board equipment. The wire harness assembly 1 includes a pair of flat cables 3, 3 and a group of round electric wires 6. The wire harness assembly 1 is formed elongated, and connector portions 10 are disposed at both ends in the longitudinal direction. In Fig. 1, the connector portions 10 are simply indicated by chain lines. The wire harness assembly 1 is electrically connected to a device or another wire harness via the connector portions 10.

[0029] Each of the pair of flat cables 3, 3 is formed in the shape of an elongated sheet. The cross section of each flat cable 3 cut along a plane perpendicular to the longitudinal direction is substantially flat and rectangular. The flat cable 3 has a known configuration in which a plurality of conductors 4 with rectangular cross sections are arranged in the width direction and covered with an insulating material 5. Each flat cable 3 is flexible. The two flat cables 3 are arranged with a gap between them in the thickness direction.

[0030] The two flat cables 3, 3 are arranged so that one side faces each other in the thickness direction. A group of round electric wires 6 is arranged between the two flat cables 3, 3.

[0031] The round electric wire group 6 is composed of a plurality of round electric wires 7. The round electric wires 7 have a known configuration in which a conductor 8 having a substantially circular cross section is covered with an insulating material 9. The longitudinal direction of each round electric wire 7 is approximately parallel to the longitudinal direction of the flat cable 3 (in other words, the longitudinal direction of the conductor 4). However, the term "approximately parallel" also includes cases in which both or either of the flat cable 3 and the round electric wires 7 have some twists or kinks.

[0032] The group of round electric wires 6 has at least one row of round electric wires 7 aligned in the direction in which the conductors 4 of the flat cable 3 are aligned. The overall cross-sectional shape of the group of round electric wires 6 is a flat shape that is elongated in the width direction of the flat cable 3.

[0033] As described above, the wire harness assembly 1 of this embodiment has a flat overall cross-sectional shape, making it suitable for routing in a vertically narrow space, such as a floor locker section of a vehicle. Furthermore, the flat shape of the wire harness assembly 1 makes it easy to bend the wire harness along a fold line extending along the width direction of the flat cable 3. The fold line can also be set diagonally relative to the width direction of the flat cable 3, allowing the wire harness to be bent in various directions. While FIGS. 1 and 2 illustrate a configuration in which the round electric wires 7 are arranged in three rows, the number of rows of the round electric wires 7 is arbitrary.

[0034] A flat cable fixing portion 2 is arranged on the outside of the group of round electric wires 6 and the pair of flat cables 3, 3. A plurality of flat cable fixing portions 2 are arranged midway along the longitudinal direction of the wire harness assembly 1. The flat cable fixing portion 2 is formed, for example, by wrapping a known adhesive tape around the outer surfaces of the pair of flat cables 3, 3. The flat cables 3, 3 are fixed to the group of round electric wires 6 by fastening the adhesive tape. This prevents the group of round electric wires 6 and the flat cables 3, 3 from coming apart.

[0035] In this embodiment, as in the prior art, the flat cables 3, 3 function as the exterior covering for the group of round electric wires 6. The insulating material 5 of the flat cable 3 has appropriate abrasion resistance, so it can protect the conductors 4 of the flat cable 3 while also providing good protection for the group of round electric wires 6 inside. Since no specially configured exterior covering is required, costs can be easily reduced and inventory management of the exterior covering is also unnecessary.

[0036] Compared to special exterior materials such as synthetic resins, the flat cable 3 generally has a simple shape and high dimensional accuracy. Therefore, the flat cable 3 can be stably held by a suction cup or the like disposed at the tip of a robot. Therefore, it is highly suitable for automatic picking using a robot or for attaching to a group of round electric wires 6.

[0037] In this embodiment, unlike the prior art, the round electric wire group 6 is arranged substantially parallel to the longitudinal direction of the flat cable 3. Therefore, in this embodiment, it is only necessary to use a flat cable 3 that is relatively shorter than the configuration of the prior art described above. This reduces costs. Because the orientations of the conductors 4 of the flat cable 3 and the conductors 8 of the round electric wire group 6 are substantially parallel, the conductor group at the terminal portion of the wire harness can be accommodated in a compact space as a whole. Therefore, for example, it is easy to arrange a layout in which the conductors 4 of the flat cable 3 and the conductors 8 of the round electric wire group 6 are connected to one connector portion 10. In addition, the arrangement in which the flat cable 3 is arranged along the longitudinal direction of the round electric wire group 6 as in this embodiment simplifies the assembly work and is more amenable to automation using robots, etc., compared to the configuration in which the flat cable is spirally wound as in the prior art.

[0038] In the wire harness assembly 1 of this embodiment, even if the number of round electric wires 7 constituting the round electric wire group 6 increases, the wire harness assembly 1 can flexibly accommodate the increased number of round electric wires 7 by increasing the distance between the two flat cables 3, 3 as shown in the second embodiment shown in Fig. 3. Therefore, it is possible to easily accommodate an increase or decrease in the number of electric wires due to a change in the vehicle model grade, for example.

[0039] As described above, the wire harness assembly 1 of the first and second embodiments includes the flat cables 3, 3 and the round electric wire group 6. The round electric wire group 6 is made up of a plurality of round electric wires 7. The round electric wire group 6 is arranged on one side in the thickness direction of the flat cable 3. The longitudinal direction of the flat cables 3, 3 is approximately parallel to the longitudinal direction of the round electric wires 7.

[0040] As a result, the wire harness assembly 1 in which the flat cable 3 also functions as an exterior sheathing can be obtained with a shorter flat cable 3 than conventionally. This reduces costs. Furthermore, since the longitudinal direction of the flat cable 3 and the longitudinal direction of the round electric wires 7 are approximately parallel, the process of arranging the flat cable 3 along the group of round electric wires 6 is simplified. This simplifies the assembly work of the wire harness assembly 1 and makes it more suitable for automation using a robot.

[0041] In the wire harness assembly 1 of the first and second embodiments, the flat cables 3, 3 are arranged in pairs so as to face each other with the group of round electric wires 6 interposed therebetween.

[0042] This makes it possible to protect a wide area around the round electric wire group 6. Furthermore, even if the number of round electric wires 7 constituting the round electric wire group 6 increases, this can be absorbed by increasing the distance between the pair of flat cables 3. Therefore, the degree of freedom in the number of round electric wires 7 can be increased, and an increase in the number of electric wires due to a change in vehicle type, etc. can be easily accommodated.

[0043] The wire harness assembly 1 of the first and second embodiments has a flat cable fixing portion 2 that fixes the flat cable 3 to the group of round electric wires 6.

[0044] This allows the flat cables 3, 3 to be fixed so that their positions relative to the group of round electric wires 6 do not shift.

[0045] In the wire harness assembly 1 of the first and second embodiments, the flat cable fixing portion 2 is arranged on the outer periphery of the flat cables 3, 3 that are arranged in a pair so as to face each other with the group of round electric wires 6 interposed therebetween.

[0046] This allows a plurality of flat cables 3, 3 arranged in pairs to be fixed at once to the round electric wire group 6. As a result, the configuration can be simplified.

[0047] Next, a third embodiment will be described.

[0048] 4, flat cables 3, 3 having a smaller number of conductors 4 than those in the first embodiment are used. The number of round electric wires 7 accommodated is the same as that in the first embodiment.

[0049] In this embodiment, since the width of the flat cable 3 is short, the conductors 4 of the flat cable 3 are not bent at the ends of the rows in which the round electric wires 7 are arranged. This reduces the load on the flat cables 3, 3, improving durability. In addition, the wire harness is easy to bend.

[0050] Next, a fourth embodiment will be described.

[0051] In the fourth embodiment shown in Fig. 5, the flat cable 3 is disposed only on one side of the group of round electric wires 6. The flat cable fixing portion 2 is wound around the outer surface of the flat cable 3 and is also wound directly around the outer surface of the group of round electric wires 6. The other configurations are the same as those of the first embodiment.

[0052] Next, a fifth embodiment will be described.

[0053] A wire harness assembly 1 of the fifth embodiment shown in Fig. 6 includes a fixing member 11 that can be fixed to a vehicle body. The fixing member 11 is made of, for example, a synthetic resin, and includes a plate portion 12 and an anchor portion 13. The plate portion 12 and the anchor portion 13 are integrally formed with each other.

[0054] The plate portion 12 is formed in a long, narrow plate shape. The anchor portion 13 is disposed in the center of the plate portion 12 in the longitudinal direction.

[0055] The plate portion 12 functions as a tape fastening portion. By wrapping adhesive tape around both sides of the plate portion 12 that sandwich the anchor portion 13 and then wrapping it around the outer periphery of the flat cables 3, 3, the fixing member 11 can be fixed to the flat cable 3. In this configuration, the adhesive tape essentially doubles as the flat cable fixing portion 2.

[0056] The anchor portion 13 is a portion for fixing the fixing member 11 to a vehicle body panel or the like. The anchor portion 13 can be hooked and fixed by, for example, inserting it into a small mounting hole formed in the vehicle body panel. The anchor portion 13 can be, for example, a known configuration consisting of multiple claws.

[0057] The plate portion 12 may be fixed by ultrasonic welding, for example, instead of being wrapped with tape.

[0058] Next, a sixth embodiment will be described.

[0059] 7 includes a known band clamp type fixing member 15. The fixing member 15 also functions as a flat cable fixing portion that fixes the flat cables 3, 3 to the group of round electric wires 6.

[0060] The fixing member 15 includes a main body portion 16, an anchor portion 17, and a band portion 18. The fixing member 15 is made of synthetic resin, and the main body portion 16, the anchor portion 17, and the band portion 18 are integrally formed with one another.

[0061] The main body 16 is formed with a through-hole 19. The insertion hole 19 is formed with a locking portion (not shown) that can be hooked onto the unevenness formed on the band portion 18.

[0062] The anchor portion 17 is provided so as to protrude from the main body portion 16. The configuration of the anchor portion 17 is substantially the same as that of the anchor portion 13 described above, and therefore a description thereof will be omitted.

[0063] The band portion 18 is formed in an elongated shape, and one end of the band portion 18 in the longitudinal direction is connected to the main body portion 16. The band portion 18 is flexible, and the tip of the band portion 18 can be inserted into the insertion hole 19 described above.

[0064] In each of the pair of flat cables 3, 3, two through holes 20 are formed in the insulating material 5. The through holes 20 are disposed at both ends of the flat cable 3 (in other words, the insulating material 5) in the width direction. The through holes 20 are disposed so as to correspond to each other in the pair of flat cables 3, 3 facing each other with the group of round electric wires 6 interposed therebetween.

[0065] With this configuration, the band portion 18 passes through the four through holes 20 while going around the outside of the round electric wire group 6, as shown by the chain line in Fig. 7. The band portion 18 is finally inserted into the insertion hole 19 and locked to prevent it from coming out.

[0066] In this configuration, as in the above-described fifth embodiment, the wire harness assembly 1 can be appropriately fixed to a vehicle body panel, etc. The through holes 20 may be omitted, and a band portion 18 may be wrapped around the outside of the pair of flat cables 3, 3, similar to the adhesive tape of the flat cable fixing portion 2 in the first embodiment.

[0067] As described above, the wire harness assembly 1 of this embodiment includes the band clamp type fixing member 15 that fixes the flat cables 3, 3 to the group of round electric wires 6. The fixing member 15 includes the band portion 18 and the anchor portion 17. The band portion 18 is wound around the outside of the flat cable 3. The anchor portion 17 can be hooked into a hole to fix the flat cable 3.

[0068] This allows the wire harness assembly 1 to be appropriately fixed to a vehicle body panel or the like with a simple configuration.

[0069] Next, a seventh embodiment will be described.

[0070] In a wire harness assembly 1 of the seventh embodiment shown in Fig. 8, a pair of flat cables 3, 3 are arranged to sandwich a round electric wire group 6 made up of round electric wires 7 arranged in a row. Widthwise ends of the pair of flat cables 3, 3 are sewn together with a thread 25. The sewn portion extends along the longitudinal direction of the flat cable 3.

[0071] This configuration can more firmly protect the internal round electric wire group 6 than the configuration in which the above-described flat cable fixing portion 2 is applied.

[0072] Next, an eighth embodiment will be described.

[0073] The wire harness assembly 1 of the eighth embodiment shown in Fig. 9 includes a branched portion 31. In the branched portion 31, some of the round electric wires 7 extend in a direction different from the longitudinal direction of the flat cables 3, 3 from between a pair of flat cables 3, 3 that are arranged substantially linearly and face each other. These round electric wires 7 are appropriately bent at positions between the flat cables 3, 3 and extend obliquely so as to deviate outward in the width direction of the flat cables 3.

[0074] Any on-board device may be connected to the wire harness assembly 1. In this embodiment, the wire harness assembly 1 connects between a plurality of integrated ECUs 51, 52 provided in a passenger vehicle. ECU is an abbreviation for Electronic Control Unit. An integrated ECU refers to an ECU that can control multiple on-board devices, rather than a single on-board device. Using an integrated ECU can reduce the number of ECUs provided in a passenger vehicle, thereby achieving space savings, etc. The group of electric wires connecting the two integrated ECUs 51, 52 is called a trunk line 36 because it generally includes a large number of electric wires. The trunk line 36 is composed of flat cables 3, 3 and a group of round electric wires 6. The group of electric wires branching from the trunk line 36 at the branch portion 31 is called a branch line 37. The branch line 37 is composed only of the group of round electric wires 6. The branch line 37 may be oriented in any direction, for example, perpendicular to the trunk line 36.

[0075] In this embodiment, the flat cables 3, 3 are arranged so as to be included in the trunk line 36, which is a circuit common to multiple different vehicle models. In other words, the branch line 37 does not include the flat cable 3. This configuration allows the advantages of the compact flat cable 3 to be utilized in multiple vehicle models. On the other hand, since the branch line 37 is composed only of the round electric wire group 6, it is possible to flexibly accommodate situations in which various auxiliary devices 53 are selectively installed in the vehicle depending on the vehicle model. This allows for a method of designing the routing of the flat cables 3, 3 so that they are common to multiple vehicle models and then using this as a basis to design the routing of the round electric wire group 6 specific to each vehicle model. This facilitates design standardization and reduces design man-hours. By using the flat cable 3, which is suitable for automated manufacturing using a robot, as described above, for common parts with large production volumes, overall production efficiency can be improved. The method of using the conductors 4 of the flat cable 3 as a common electrical circuit may be applied not only between multiple different vehicle models but also between multiple model numbers with different specifications within the same vehicle model or between multiple grades of the same vehicle model.

[0076] The flat cable fixing portions 2 described above are arranged on both longitudinal sides of the trunk wire 36, sandwiching the branch portion 31. The starting ends 38 of the branch wires 37, which extend in different directions relative to the trunk wire 36, are located between the two flat cable fixing portions 2. This allows the starting ends 38 of the branch wires 37 to be fixed without shifting their positions. The branch wires 37 may be fixed by wrapping tape around the round electric wire group 6, for example.

[0077] As described above, the wire harness assembly 1 of this embodiment includes the branch portion 31. At this branch portion 31, the group of round electric wires 6 extends from between the pair of flat cables 3, 3 in a direction different from the longitudinal direction of the flat cables 3.

[0078] This makes it possible to realize a branched wire harness with a simple configuration.

[0079] In the wire harness assembly 1 of this embodiment, the branch portion 31 is configured so that the branch wires 37 branch off from the middle of the trunk wire 36. The trunk wire 36 includes flat cables 3, 3. The branch wires 37 are configured from a group 6 of round electric wires.

[0080] By configuring the branch wire 37 so that it does not include the flat cable 3, the degree of freedom in circuit design can be increased compared to using a flat cable 3 configured with a plurality of wires already attached as the branch wire 37. Therefore, it is possible to easily accommodate circuit designs that require variation.

[0081] The wire harness assembly 1 of this embodiment is used in a vehicle. In this wire harness assembly 1, the conductors 4 of the flat cable 3 form an electric circuit that is common to a plurality of different vehicle models.

[0082] This makes it possible to reduce the overall number of design steps for multiple vehicle types, and also makes it possible to utilize the advantages of the compact flat cable 3 for multiple vehicle types.

[0083] In the wire harness assembly 1 of this embodiment, the flat cable fixing portions 2, 2 are arranged on both sides of the starting end 38 at which the branch wire 37 extends in a different direction from the trunk wire 36.

[0084] This allows the shape of the branching portion 31 to be maintained in a good condition.

[0085] The preferred embodiment of the present invention has been described above, but the above configuration can be modified, for example, as follows. Each modification may be made alone, or multiple modifications may be made in any combination.

[0086] Instead of using adhesive tape and a band clamp to secure the flat cable 2, the group of round electric wires 6 and the flat cable 3 can be secured to each other by welding or adhesion, for example. Any method of securing can be used, including adhesive, hot melt, heating, ultraviolet light, laser, etc. The wire harness assembly 1 may also be provided with a securing portion that secures only the group of round electric wires 6. Similarly, the securing member 11 of the fifth embodiment can be secured to the flat cable 3 by adhesive, hot melt, heating, ultraviolet light, laser, etc.

[0087] The configuration of the fourth embodiment in which the flat cable 3 is provided only on one side of the round electric wire group 6 can be combined with any of the fifth, sixth and eighth embodiments.

[0088] For example, in the first embodiment, there may be more than one flat cable on at least one side of the pair of flat cables 3. For example, two flat cables 3 may be arranged on one side and two on the other side, stacked in the thickness direction.

[0089] The flat cable 3 can be bent at an angle of 45° and the group of round electric wires 6 can be bent along this bent portion to form a vertical bent portion in the wire harness assembly 1. The angle of the bent portion is not limited to a vertical angle and can be any angle.

[0090] The group of round electric wires 6 and the flat cable 3 may be further covered with an exterior material disposed on the outside. [Explanation of symbols]

[0091] 1 Wire harness assembly 2 Flat cable fixing part 3 Flat Cable 6 Round wire group 7. Round Wire 17 Anchor part 31 Branch 36 Main line 37 Branch Line 38 Starting end

Claims

1. Flat cable and a round electric wire group consisting of a plurality of round electric wires; Equipped with the group of round electric wires is arranged on one side of the flat cable in a thickness direction, A wire harness assembly, wherein the longitudinal direction of the flat cable is substantially parallel to the longitudinal direction of the round electric wires.

2. The wire harness assembly according to claim 1, The wire harness assembly is characterized in that the flat cables are arranged in pairs so as to face each other with the group of round electric wires therebetween.

3. The wire harness assembly according to claim 1, a flat cable fixing portion for fixing the flat cable to the group of round electric wires;

4. The wire harness assembly according to claim 3, The flat cables are arranged in pairs facing each other with the group of round electric wires in between, a flat cable fixing portion disposed on an outer periphery of the flat cables arranged in pairs;

5. The wire harness assembly according to claim 3 or 4, The flat cable fixing portion is a band portion wound around the outside of the flat cable; An anchor part that can be hooked into a hole and fixed in place, A wire harness assembly comprising:

6. The wire harness assembly according to claim 1, The flat cables are arranged in pairs facing each other with the group of round electric wires in between, A wire harness assembly, characterized in that the group of round electric wires has a branch portion extending from between the pair of flat cables in a direction different from the longitudinal direction of the flat cables.

7. 7. The wire harness assembly according to claim 6, The branching section is configured so that the branch line branches off from a longitudinal midpoint of the trunk line, the trunk line includes the flat cable, The branch wire is formed from the round electric wire.

8. The wire harness assembly according to claim 6 or 7, Used in vehicles, A wire harness assembly characterized in that the conductors of the flat cable form a common electrical circuit between multiple different vehicle models, between multiple model numbers of the same vehicle model but with different specifications, or between multiple grades of the same vehicle model but with different specifications.

9. The wire harness assembly according to claim 7, a flat cable fixing portion for fixing the flat cable to the group of round electric wires, the flat cable fixing portion being disposed on both sides of a starting end portion of the branch wires extending in a different direction from the trunk wire.

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