JP2010006179A - Wiring harness wiring structure in vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring harness wiring structure in a vehicle seat capable of reducing a space of a wiring area by absorbing the excessive length of a wiring harness in a seat in a manner of space saving. <P>SOLUTION: In this wiring harness wiring structure in the vehicle seat, the wiring harness 10 is fixed to a wiring harness fixing part 18 under the rear side of a rotary shaft 16, and wired upward by bypassing the front side of the rotary shaft 16 from the fixed part, and also wired in a seat back 13. Thus, the excessive length of the wiring harness can be absorbed in a manner of space saving. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire harness wiring structure in a vehicle seat, and more particularly, to an improvement for improving wiring workability and simultaneously 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.

  10 and 11 show a conventional example of a wire harness wiring structure in a vehicle seat. As shown in FIGS. 10 and 11, the wire harness routing structure 100 is provided such that a seat back 104 can be reclined by a horizontal rotation shaft 105 on a side frame 102 to which a seat cushion (not shown) is attached. 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 necessary to route such a thick bundle of wire harnesses so as to fit in a narrow space inside the vehicle seat. In addition, the wire harness is routed including a surplus length so that the wire harness can properly follow the reclining of the seat back, and depending on the tilt position of the seat back, it is necessary to be able to absorb the surplus length.

  Therefore, it is desired to wire the wire harness in the vehicle seat in a space-saving manner and to absorb the extra length.

  An object of the present invention is to solve the above-described problems, and to provide a wire harness wiring structure in a vehicle seat that can absorb the extra length of the wire harness in a space-saving manner.

The above object of the present invention is achieved by the following configurations.
(1) A side frame, a horizontal rotation shaft provided on the side frame, a seat back that can rotate around the rotation shaft, and a rotation shaft that is parallel to the rotation shaft and more than the rotation shaft. A vehicle seat having a wire harness fixing portion provided near the rear;
A wire harness configured by bundling a plurality of electric wires and introduced from the side frame into the vehicle seat and routed to each part inside the vehicle seat;
A wire harness wiring structure in a vehicle seat, comprising:
The wire harness is fixed to the wire harness fixing portion below and below the rotating shaft, and is not routed upward from the fixed portion through the rear side of the rotating shaft. A wire harness routing structure in a vehicle seat, wherein the wiring harness is routed upward by detouring to the front side of a dynamic shaft and further routed in the seat back.

(2) The wire harness routing structure in the vehicle seat according to (1), wherein a portion of the wire harness that detours to the front side of the rotation shaft is configured in a flat shape.

  According to the configuration of (1) above, the wire harness is not routed upward through the rear side of the rotation shaft, but is routed around the front side of the rotation shaft, so the seat back is moved forward. When it is rotated, an extra length of the wire harness occurs. Since this extra length portion is displaced so that the detour radius is enlarged by this action at the fulcrum at the fixing portion in the wire harness fixing portion, the extra length can be absorbed in a space-saving manner. Moreover, since the wire harness is routed using the periphery of the rotating shaft, the wire harness can be routed in a space-saving manner.

  According to the configuration of (2) above, the portion of the wire harness that detours to the front side of the rotating shaft is configured in a flat shape, and therefore the wire harness can be easily bent. Therefore, the bypass radius of the wire harness can be reduced, the wire harness can be routed in a space-saving manner, and the extra length can be absorbed in a space-saving manner.

  According to the wire harness routing structure in the vehicle seat according to the present invention, the extra length of the wire harness can be absorbed in a small space even in a narrow space inside the vehicle seat. Can be routed.

  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.

  FIG. 1 is a side view of a vehicle seat according to the embodiment, FIGS. 2 to 4 are wiring harness wiring views in different reclining states, FIG. 5 is a perspective view of the wire harness, and FIG. 6 is a part of the protector. FIG. 7 is a perspective view of the inner trim, and FIGS. 8 and 9 are perspective views of a portion where the wire harness has come out of the side frame.

  As shown in FIG. 1, the wire harness routing structure in the vehicle seat according to the first embodiment includes an interior of the seat including a seat back 13 in which the wire harness 10 is introduced into the seat from the side frame 12 below the vehicle seat. It is routed to each part of

  The wire harness 10 has a connector 14 connected to a supply-side end that is drawn out of the seat. This connector 14 is connected to another harness on the passenger 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 FIGS. 2 to 4, the side frame 12 is provided with a rotation shaft 16 that rotatably supports the seat back 13, and the seat back 13 rotates (recliner) with the rotation shaft 16 as a fulcrum. ) Is configured to be able to. 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. 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.

  The wire harness 10 is configured by bundling a plurality of electric wires, and appropriate portions in the axial direction are fixed by a binding tool (not shown) such as a tape or a tie band. The wire harness originally has a substantially circular cross section over its entire length, but as shown in FIG. 2, a flat portion 10a in which the wire harness 10 is thinned and flattened by dispersing the bundled electric wires in a plane in a predetermined portion in the axial direction. Is formed. The length of the flat part 10a is set according to the part inside and outside the vehicle seat where it is preferable to route the flat part 10a. The flat portion 10a is maintained in a flat shape by a binding tool (not shown) such as a tape or a tie band. In the present embodiment, the wire harness 10 is covered with a mesh-like protective material 21 made of synthetic resin, and a flat portion 10 a is formed together with the protective material 21.

  In the present embodiment, the wire harness 10 is routed so that the flat portion 10 a of the wire harness 10 is positioned around the rotating shaft 16. 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 easily bent and wired even in an extremely narrow space such as the inside of the vehicle seat. It becomes possible to do.

  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. Moreover, even if the number of the electric wires which comprise the wire harness 10 increases, only the width | variety of the flat part 10a increases, and the bendability of the flat part 10a does not change.

  Around the rotating shaft 16, the wire harness 10 is covered with a protector 22 having a curved and defined wire harness accommodating portion as shown in FIG. 6, thereby preventing contact with peripheral members. In FIG. 6, the side wall on the front side of the protector 22 in the drawing is not shown, but the wire harness housing portion is defined by four wall surfaces.

  In addition, the wire harness 10 fixed to the fixing portion 18 is routed horizontally along the fixing portion 18, and one end portion is exposed to the outside of the side frame 12 as shown in FIG. 8. Here, an inner trim 24 having the configuration shown in FIG. 7 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. FIG. 7A is a perspective view of the inner trim 24 viewed from the inside of the seat, and FIG. 7B is a perspective view of the inner trim 24 viewed from the outside of the seat.

  In the wire harness 10, the flat portion 10 a is routed also in the fixed portion 18 and the inner trim 24, and the inner trim 24 includes a pair of wall portions for holding the flat portion 10 a of the wire harness 10. A portion 24a is formed. As shown in FIG. 8, the flat portion 10 a of the wire harness 10 is routed forward from the rear portion of the side frame 12.

  The wire harness 10 extends as the seat back 13 rotates rearward, and extends the longest when the seat back 13 is fully flat. As the seat back 13 is rotated forward, an extra length is generated on the wiring path of the wire harness 10.

  That is, as the seatback 13 shown in FIG. 4 is tilted backward to the state shown in FIGS. 3 and 2, the extra length of the wire harness 10 increases. And since the wire harness 10 is being fixed to the predetermined position in the seat back 13, mainly the part 10b near the lower exit of the protector 22 expands the diameter of the curved state below the rotating shaft 16. It deforms to absorb the extra length.

  The wire harness 10 is deformed with the portion fixed to the fixing portion 18 as a fulcrum, and the portion around the rotation shaft 16 moves in a direction away from the rotation shaft 16 by the lever action so as to absorb the extra length. The surplus part moves mainly downward. Therefore, since the curved portion of the wire harness 10 is deformed in the diameter expanding direction and moves downward, the surplus length is absorbed, so that the surplus length can be absorbed in a small space around the rotating shaft 16. .

  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, in the above embodiment, the wire harness 10 around the rotation shaft 16 is formed in the flat portion 10a, but the wire harness 10 may not be formed in the flat portion 10a and has a substantially circular cross section over the entire length. There may be. In this case, the wire harness holding portion 24a in the inner trim 24 shown in FIG. 8 is also a holding portion 24a configured to hold a substantially circular portion as shown in FIG.

1 is a side view of a vehicle seat according to an embodiment of the present invention. It is a wiring diagram of the wire harness in the vehicle seat of a reclining state, and represents the state at the time of a driving posture. It is a wiring diagram of the wire harness in the vehicle seat of the reclining state, and represents a state in which the seat back is rotated backward from the driving posture. It is a wiring diagram of the wire harness in the vehicle seat of a reclining state, and represents the state which made the seat back close to full flat. It is a perspective view of a wire harness. It is a partially cutaway perspective view of a protector. It is a perspective view of an inner trim. It is a perspective view of the part which the flat part of the wire harness came out of the side frame. It is a perspective view of the part which the cross-sectional substantially circular part of the wire harness protruded out of the side frame. It is a perspective view of the wire harness in the conventional vehicle seat. It is a principal part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wire harness 10a Flat part 10b Extra length absorption part 12 Side frame 13 Seat back 14 Connector 16 Rotating shaft 18 Wire harness fixing part 20 Clip 21 Protective material 22 Protector 24 Inner trim

Claims (2)

A side frame, a horizontal rotation shaft provided on the side frame, a seat back that can rotate about the rotation shaft, and a rear side of the rotation shaft in parallel with the rotation shaft A vehicle seat having a wire harness fixing portion provided;
A wire harness configured by bundling a plurality of electric wires and introduced from the side frame into the vehicle seat and routed to each part inside the vehicle seat;
A wire harness wiring structure in a vehicle seat, comprising:
The wire harness is fixed to the wire harness fixing portion below and below the rotating shaft, and is not routed upward from the fixed portion through the rear side of the rotating shaft. A wire harness routing structure in a vehicle seat, wherein the wiring harness is routed upward by detouring to the front side of a dynamic shaft and further routed in the seat back.   The wire harness routing structure in the vehicle seat according to claim 1, wherein a portion of the wire harness that detours to the front side of the rotating shaft is configured in a flat shape.

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