JP5235108B2 - Wire harness wiring structure - Google Patents

Description

  The present invention relates to a wire harness wiring structure, and more particularly to an improvement for improving wiring workability and at the same time saving a wiring area.

  The vehicle seat has an electric seat device that adjusts the position of the seat cushion in the front-rear direction and the up-and-down direction according to the posture of the passenger, and the reclining operation of the seat back, and an airbag between the passenger and the side door. In some cases, an airbag unit device that is to be deployed is provided, and in a vehicle seat in which such a device is mounted, a wire harness is routed to supply power to the electric component.

  7 and 8 show a conventional example of a wire harness wiring structure in a vehicle seat. As shown in FIGS. 7 and 8, the wire harness routing structure 100 is provided on a side frame 102 to which a seat cushion (not shown) is mounted so that a seat back 104 can be reclined by a horizontal rotation shaft 105. In the vehicle seat 106, the wire harness 108 is routed to the seat back 104 from below the seat.

  The wire harness 108 is covered and protected in the corrugated tube 109 on the routing route. The wire harness 108 is routed in parallel with the intermediate portion 109a along the rotation shaft 105, and the intermediate portion 109a is fixed to the rotation shaft 105 with a clamp 110, and the continuous portions on both sides of the intermediate portion 109a are respectively connected to the other portions. The clamps 112 and 114 are fixed to the seat cushion and the seat back 104.

This type of wiring harness wiring structure is also disclosed in Patent Document 1 below.
JP 2006-304538 A

  However, with the improvement of the function of the vehicle seat, the number of electric parts increases, and the wire harness used for power supply also tends to increase in the diameter of the bundle due to an increase in the number of wires bound. And it is difficult to bend such a thick bundle of wire harnesses so as to fit in a narrow space inside the vehicle seat, and there is a problem that workability is poor.

  In addition, since a thick bundle of wire harnesses is difficult to bend, there is a problem that the bending radius of the wire harness becomes large and a wide wiring space is required.

  An object of the present invention is to solve the above-described problems, and to provide a wire harness wiring structure that can improve the wiring workability of the wire harness and can save a wiring area.

The above object of the present invention is achieved by the following configurations.
(1) A wire harness routing structure for routing a wire harness configured by binding a plurality of electric wires into a substantially circular cross section,
The wire harness has a flat portion in which the bundle of the plurality of electric wires is thinned and flattened partially over a predetermined length along the extending direction, and the flat shape is maintained .
The bundle of the plurality of electric wires is covered with a resin protective material along the extending direction, and the accommodation space for accommodating the bundle of the plurality of electric wires is accommodated in a protector having a flat cross section. The flat shape is held together with the protective material,
A wire harness wiring structure, wherein the wiring direction is changed by bending the flat portion .

(2) The wire harness routing structure according to (1), wherein the binding tool binds the flat portions at both ends of the flat portion in the extending direction .

(3) The wire harness is routed on a vehicle seat having a side frame, a horizontal pivot shaft provided on the side frame, and a seat back pivotable about the pivot shaft.
The wire harness is not routed upward from the lower part of the pivot shaft through the rear side of the pivot shaft, and is routed upward by bypassing the front side of the pivot shaft. The wire harness according to (1) or (2), wherein a portion that is routed in a bag and detours to the front side of the rotating shaft of the wire harness is configured in a flat shape. Routing structure.

  According to the configuration of (1) above, even if the wire bundle constituting the wire harness becomes thicker, the wire harness can be easily bent at the flat part that is partially thinned and flattened. Can be improved.

  Further, since the wire harness can be easily bent at the flat portion, the bending radius is not increased, and the wiring area can be saved.

  Further, since the wire harness can be bent at the flat portion, a wide space is not required for changing the wiring direction, and the wiring area can be saved.

In addition, according to the configuration of (1) above , since the wire harness is covered with the protective material, even if the wire harness is routed in a narrow space, the wire harness does not come into contact with surrounding members due to vibration or the like. Damage to the wire harness can be prevented.

Moreover, according to the configuration of (1) above, since the flat shape is held by the binding tool, any portion of the wire harness can be easily formed into a flat shape. Therefore, it is possible to form the flat portion at the routing site, and it is easy to change the portion forming the flat shape according to the change of the routing portion. Here, a tape, a tie band, etc. can be used as a binding tool.

In addition, according to the configuration of (1) above, since the flat shape is held by the protector, even if the wire harness is routed in a narrow space, the wire harness does not come into contact with surrounding members due to vibration or the like. Damage to the harness can be prevented.

Moreover, according to the structure of said (1) , the wiring freedom degree of a wire harness increases by changing a wiring direction by bending a flat part.

  According to the wire harness routing structure in the vehicle seat according to the present invention, the flat portion partially formed in the wire harness can be bent, twisted or bent with a small radius, and routing workability Can be improved. Further, when the flat portion is bent, the bending radius is not increased, and the flat portion can be bent and routed, so that the wiring area can be saved.

  Hereinafter, a preferred embodiment of a wire harness routing structure in a vehicle seat according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
1 is a perspective view of a wire harness according to a first embodiment of the present invention, FIG. 2 is a side view of the wire harness of FIG. 1, and FIG. 3 is a wiring diagram of the wire harness of FIG.

  The wire harness 10 is configured by bundling a plurality of electric wires 42, and an appropriate portion in the extending direction is fixed by a binding tool (not shown) such as a tape or a tie band. The wire harness 10 originally has a substantially circular cross section over its entire length, but a flat portion 10a is formed in a predetermined portion in the extending direction by dispersing the bundled electric wires 42 in a flat shape and thinning the wire harness into a flat shape. Yes. The flat portion 10a is maintained in a flat shape by a binding tool 44 such as a tape or a tie band.

  The binding tool 44 holds the flat shape of the wire harness 10 by binding the flat portions 10a at appropriate locations including both ends in the extending direction of the flat portion 10a.

  As shown in FIG. 1, the flat portion 10a is wider than the substantially circular portion 10c in cross section when the electric wires 42 are dispersed in a flat shape, and is thinner than the substantially circular portion 10c in cross section as shown in FIG. . Therefore, it is easy to bend in the directions indicated by arrows A and B in FIG.

  FIG. 3 shows a state in which the wire harness is routed around the rotation axis of the reclining seat of the vehicle seat. The wire harness 10 is connected to a connector (not shown) at the supply side end that is pulled out of the seat, and this connector is connected to another harness on the vehicle compartment side. The seat inner side of the wire harness 10 is branched into a plurality of branch harnesses and the like, and is connected to each electric part (electric device) in the seat.

As shown in FIG. 3, the side frame 12 is provided with a rotation shaft 16 that rotatably supports the seat back 13, and the seat back 13 can be rotated (reclining) with the rotation shaft 16 as a fulcrum. It is configured. The side frame 12 is provided with a fixing portion 18 for fixing the wire harness 10 on the rear side of the rotating shaft 16. An inner trim 24 is attached to the inside of the side frame 12 so that the vicinity of the rotation mechanism of the side frame 12 cannot be seen from the outside.
A portion of the wire harness 10 introduced from the side frame 12 is fixed to the fixing portion 18 by the clip 20. The wire harness 10 fixed to the fixing portion 18 is routed so as to wrap around approximately two thirds of the rotating shaft 16 by bypassing the front side of the rotating shaft 16 and further upward in the seat back 13. It has been routed.

  Further, the flat portion 10 around the rotating shaft 16 is routed 90 degrees with respect to the flat portion 10a fixed to the fixing portion 18. That is, the flat portion 10 a is in a positional relationship facing the fixed portion 18 and the rotation shaft 16.

  Thus, by changing the wiring direction of the wire harness 10 using the flat portion 10a, the wire harness 10 can be bent and wired even in an extremely narrow space such as the inside of the vehicle seat. Is possible. Further, when the wire harness 10 is bent and routed around the rotation shaft 16, the flat portion 10a is easily bent, so that the bending radius is not increased, and the routing area is saved. Further, since it is possible to twist the flat portion 10a and change the direction by 90 degrees, the routing workability is good and the flexibility in the routing direction is high.

[Second Embodiment]
FIG. 4 is a perspective view of a wire harness used in the second embodiment of the present invention. The wire harness 10 of the second embodiment is different from the first embodiment in that a resin protective material 21 is attached to the wire harness 10, and other configurations are the same as those of the first embodiment. The protective material 21 has, for example, a mesh structure, can be easily deformed, and is easily bent. As the protective material 21, for example, a wire harness wear prevention mesh tube manufactured by Federal Mogul System Protection Co., Ltd. can be used.

  In the wire harness 10 of the second embodiment, the entire extending direction is covered with a protective material 21, and the flat portion 10 a is formed by deforming the wire harness 10 together with the protective material 21. And the electric wire 42 which comprises the wire harness 10 is disperse | distributed to planar shape, flat shape is formed, and the protection material 21 and the wire harness 10 are bound from the outer side of the protection material 21 with the binding tools 44, such as a tape and a tie band. Holds a flat shape.

  The wire harness routing structure of the second embodiment is different from the first embodiment only in the configuration of the wire harness 10 to be used, and as shown in FIG. 3, the routing structure to the vehicle seat is the same as that of the first embodiment. The same. Note that the wire harness 10 of the second embodiment may have the configuration shown in FIG. 5 in which the binding tool 44 is omitted.

  According to the wire harness routing structure of the second embodiment, since the wire harness 10 is covered with the protective material 21, even if the wired wire harness 10 is in contact with surrounding members due to vibration or the like, the wire harness 10 Will not be damaged.

[Third Embodiment]
Moreover, you may wire | wear with each wire harness 10 in 1st Embodiment and 2nd Embodiment, attaching the resin-made protectors 22 shown in FIG. In this case, the protector 22 may be configured to have a shape having a flat-shaped wire harness housing space, and the flat shape may be maintained by housing the wire harness 10 in the protector 22. Further, in this case, the binding tool 44 in the flat portion 10a may be omitted.

  FIG. 6 is a partially cutaway perspective view of the protector 22 when a flat portion is routed around the rotation axis of FIG. The protector 22 has a wire harness housing space that is curved according to the wire harness routing path around the rotating shaft 16, and this wire harness housing space substantially corresponds to the thickness of the flat portion 10 a of the wire harness 10. It is formed at the same height. Therefore, the flat shape 10a of the wire harness 10 is accommodated in the protector 22 so that the flat shape is maintained. And the wire harness 10 does not contact an external member by vibration etc., and damage to the wire harness 10 can be prevented. In addition, in FIG. 6, in order to show the wire harness accommodation space of the protector 22, the side wall of the front side of the protector 22 is abbreviate | omitting illustration.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, although the said embodiment is a wire harness wiring structure in a vehicle seat, the target object which wires a wire harness may be not only a vehicle seat but anything.

It is a perspective view of the wire harness used for 1st Embodiment of this invention. It is a side view of the wire harness of FIG. It is a wiring diagram of the wire harness which is 1st Embodiment of this invention. It is a perspective view of the wire harness used for 2nd Embodiment of this invention. It is a perspective view of the modification of the wire harness used for 2nd Embodiment of this invention. It is a partially cutaway perspective view of the protector used for 3rd Embodiment of this invention. It is a wiring diagram of the conventional wire harness. It is a principal part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wire harness 10a Flat part 12 Side frame 13 Seat back 16 Rotating shaft 18 Wire harness fixing part 20 Clip 21 Protective material 22 Protector 24 Inner trim

Claims (3)

A wire harness routing structure for routing a wire harness configured by binding a plurality of electric wires into a substantially circular cross section,
The wire harness has a flat portion in which the bundle of the plurality of electric wires is thinned and flattened partially over a predetermined length along the extending direction, and the flat shape is maintained .
The bundle of the plurality of electric wires is covered with a protective material made of resin along the extending direction, and the accommodating space for accommodating the bundle of the plurality of electric wires is accommodated in a protector having a flat cross section. The flat shape is held together with the protective material,
A wire harness wiring structure, wherein the wiring direction is changed by bending the flat portion . The wire harness routing structure according to claim 1, wherein the binding tool binds the flat portion at locations of both end portions in the extending direction of the flat portion . The wire harness is routed on a vehicle seat having a side frame, a horizontal rotation shaft provided on the side frame, and a seat back that can rotate about the rotation shaft.
The wire harness is not routed upward from the lower part of the pivot shaft through the rear side of the pivot shaft, and is routed upward by bypassing the front side of the pivot shaft. The wire harness routing structure according to claim 1 or 2, wherein a portion that is routed in a bag and detours to the front side of the rotating shaft of the wire harness is configured in a flat shape. .

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