JP6049447B2 - Wiring harness arrangement structure for vehicle seat - Google Patents

Description

  The present invention relates to a wire harness routing structure for routing a wire harness to a vehicle seat.

  In the movable wire harness described in Patent Document 1 below, a case having an insertion opening and an outlet for a wire harness routed from the vehicle body to the door is fixed to the vehicle body, and the wire harness is disposed inside the case. It is meandering in a letter shape. Thus, the U-shaped portion of the wire harness is deformed following the opening and closing of the door. Further, an elastic body (elastic member) is stretched between the wire harness and the case so that the wire harness is pulled back into the case when the door is closed.

  Similarly, in the wiring harness wiring structure for a sliding door for an automobile described in Patent Document 2 below, the relay wiring harness routed from the vehicle body side to the sliding door side is fixed to the vehicle body side or the sliding door side. The case is bent and inserted into a U shape. Thus, the U-shaped portion of the wire harness is deformed following the opening and closing of the slide door. An elastic member is stretched between the wire harness and the case so that the wire harness is pulled back into the case when the slide door is closed.

JP 2001-97147 A JP 2003-220901 A

  In the configurations described in Patent Documents 1 and 2, the wire harness is housed in the case and is urged in a direction to be pulled back into the case by the elastic member. For this reason, the way of movement of the wire harness accompanying the movement of the door or the slide door (moving unit) can be stabilized, and the wire harness can be prevented from inadvertently interfering with other components. However, since a special case or elastic member is required, the cost is increased.

  In view of the above facts, the present invention has an object to obtain a wiring harness wiring structure for a vehicle seat that can stabilize the manner of movement of the wire harness accompanying the movement of the moving portion and can reduce the cost. And

In the wire harness routing structure for a vehicle seat according to the first aspect of the present invention, the moving part is connected to the connecting partner so as to be relatively movable to one side and the other side, and the harness taking-out part is connected to the moving part. The sheet main body is provided, and the moving part extends from the harness take-out part to the one side, and the middle part in the longitudinal direction is bent at the arc-shaped one-side bending part that protrudes toward the one side, to the other side. In the state where the extending wire harness and the moving part are located at either one end or the other end of the relative movement range with respect to the connection partner , the harness extending portion is extended to the other side in the longitudinal intermediate portion of the wire harness. And a fixing member that is fixed to the connection partner on the one side with respect to the portion.

  In the wire harness routing structure for a vehicle seat according to claim 1, when the moving unit moves relative to the connection partner to one side and the other side, the harness extracting unit provided in the moving unit, and the harness extracting unit The distance between the wire harness extending from one side to the other and the fixing member that fixes the wire harness to the connection partner changes. Thereby, the site | part (henceforth a movable part) between the harness extraction part and fixed member in a wire harness deform | transforms. The wire harness extends from the harness take-out portion of the moving portion to one side, and is bent at an arc-shaped one-side bent portion that protrudes toward one side and extends to the other side. The portion extending to the side is fixed to the connection partner by the fixing member on one side of the harness extraction portion.

  That is, in the movable part of this wire harness, the length dimension from the one side bending part to the fixing member is set shorter than the length dimension from the one side bending part to the harness extraction part. Thereby, a restriction | limiting can be given to the movement of the one side bending part accompanying the movement of a moving part by a fixing member. And the one side bending part of a wire harness tends to elastically return to the direction in which the site | part between the one side bending part and harness extraction part in a wire harness leaves | separates from a fixing member. That is, since the wire harness tries to elastically return in a specific direction, it is possible to stabilize the movement of the wire harness accompanying the movement of the moving unit. Moreover, since it is only necessary to fix a part of the wire harness to the connection partner by the fixing member, the cost can be reduced.

  The wire harness routing structure for a vehicle seat according to a second aspect of the present invention is the wiring structure for a vehicle seat according to the first aspect, wherein the fixing member has a portion extending to the other side in a longitudinal intermediate portion of the wire harness. The portion extending to the other side is fixed to the connection partner in a state where the bending angle of the one-side bending portion is inclined with respect to the moving direction.

  Since the wire harness routing structure for a vehicle seat according to claim 2 is configured as described above, when the movable part of the wire harness is deformed with the movement of the moving part, the one-side bent part is provided. The generated stress can be prevented from becoming excessive. As a result, the wire harness can be prevented from being deformed in an unspecified direction in order to relieve excessive stress generated in the one-side bent portion. Thereby, the way of movement of the wire harness accompanying the movement of the moving part can be further stabilized.

  A wire harness routing structure for a vehicle seat according to a third aspect of the present invention is the wiring structure for a vehicle seat according to the first or second aspect, wherein the connection partner is a seat back, and the moving portion is moved relative to the seat back. The wire harness extends downward from the harness take-out portion provided in the headrest and is routed in the seat back, and a middle portion in the longitudinal direction is the head back. The arc-shaped one-side bent portion that protrudes downward as viewed from the front-rear direction of the wire harness and extends upward, and the fixing member has a portion extending upward in the longitudinal intermediate portion of the wire harness. Secure to the back.

  In the wire harness routing structure for a vehicle seat according to claim 3, when the headrest moves relative to the upper side and the lower side with respect to the seat back, a harness extraction portion provided on the headrest and a lower side from the harness extraction portion The distance between the wire harness extending to the fixing member that fixes the wire harness to the seat back changes. Thereby, the site | part (movable part) between the harness extraction part and fixed member in a wire harness deform | transforms. This wire harness extends from the harness extraction part of the headrest to the lower side and is routed in the seat back, and the arcuate one side in which the middle part in the longitudinal direction protrudes downward as seen from the front and rear direction of the seat back It is bent at the bending portion and extends upward, and the portion extending upward is fixed to the seat back below the harness extraction portion by the fixing member.

  That is, in the movable part of this wire harness, the length dimension from the one side bending part to the fixing member is set shorter than the length dimension from the one side bending part to the harness extraction part. Thereby, a restriction | limiting can be given to the movement of the one side bending part accompanying the movement of a headrest with a fixing member. And the one side bending part of a wire harness tends to elastically return to the direction (here sheet width direction one side) in which the site | part between the one side bending part and harness extraction part in a wire harness leaves | separates from a fixing member. That is, since the wire harness attempts to elastically return in a specific direction, the movement of the wire harness accompanying the movement of the headrest can be stabilized. As a result, it is possible to prevent the wire harness from inadvertently moving in the front-rear direction of the seat back and interfering with other components, so that it is possible to prevent the generation of abnormal noise due to the interference.

  According to a fourth aspect of the present invention, there is provided a wiring harness routing structure for a vehicle seat according to the third aspect, wherein a backboard having a thickness direction along the front-rear direction of the seatback is provided on the back surface of the seatback. The fixing member fixes the portion extending upward in the longitudinal intermediate portion of the wire harness to the backboard.

  In the wire harness routing structure for a vehicle seat according to claim 4, the wire harness extending downward from the harness take-out portion of the headrest and routed in the seat back is fixed to the backboard by the fixing member. Since this backboard is provided on the back surface of the seat back with the thickness direction along the front and back direction of the seat back, the arcuate shape in which the middle part in the longitudinal direction protrudes downward as seen from the front and back direction of the seat back. The wire harness that is bent at the one-side bent portion and extends upward can be fixed to the backboard with a simple configuration. And since a part of wire harness is restrained by a backboard, it can suppress effectively that a wire harness moves carelessly within a seat back.

Wire harness cabling structure of a vehicle seat according to the invention according to claim 5, in 請 Motomeko 4, the wire harness, provided on the opposite side to the one side bent portion through the fixing member The intermediate connector portion can be divided, and the intermediate connector portion is fixed to the backboard.

  In the wire harness routing structure for a vehicle seat according to claim 5, since the wire harness can be divided at the intermediate connector portion, the headrest side portion of the wire harness is assembled together with the headrest. be able to. Thereby, manufacture can be made easy. Moreover, since the intermediate connector portion is provided on the opposite side (non-movable portion) to the one-side bent portion via a fixing member in the wire harness and is fixed to the backboard, the intermediate connector portion moves carelessly. Can be prevented from interfering with other parts.

  As described above, in the wire harness routing structure for a vehicle seat according to the present invention, the manner of movement of the wire harness accompanying the movement of the moving part can be stabilized, and the cost can be reduced.

It is a perspective view showing the partial composition of the vehicular seat concerning the embodiment of the present invention. It is a front view which shows the structure around the movable part of the wire harness with which the vehicle seat is provided. A partial configuration is shown in the vehicle seat, in which (A) is a view showing a state where the headrest is located at the lower most position, and (B) is a view showing a state where the headrest is located at the upper most position. It is a perspective view corresponding to FIG. 1 which shows the comparative example of the vehicle seat.

  Hereinafter, the wire harness arrangement structure of the vehicle seat according to the embodiment of the present invention will be described with reference to FIGS.

(Constitution)
As shown in FIG. 1, the wire harness routing structure for a vehicle seat according to the present embodiment includes a seat body 12 that constitutes a body portion of the vehicle seat. Note that arrows FR, UP, and W, which are appropriately shown in the drawings, indicate the front direction, the upward direction, and the width direction (left-right direction) of the sheet body 12.

  In the seat main body 12, a headrest 14 as a moving unit is connected to a seat back 16 as a connection partner. This seat back 16 is tiltably connected to a rear end portion of a seat cushion (not shown) connected to the vehicle body floor. Hereinafter, when the description is made simply using the front-rear and up-down directions, the front-rear direction of the seat back 16 and the up-down direction of the seat back 16 are indicated unless otherwise specified.

  The seat back 16 includes a seat back frame 18 that is a skeleton member. The seat back frame 18 includes a pair of left and right side frames 20 disposed to face each other in the seat width direction, and an inverted U-shaped upper frame 22 that connects upper ends of the left and right side frames 20. The left and right side frames 20 are made of a sheet metal material, and the upper frame 22 is made of a pipe material. Further, a sheet metal upper panel 24 is stretched between the left and right leg portions of the upper frame 22 on the back side of the seat back frame 18. Although not shown, a lower panel made of sheet metal is stretched between the lower end portions of the left and right side frames 20 on the back side of the seat back frame 18.

  A seat back pad (not shown) covered with a seat back skin 26 is attached to the seat back frame 18. Further, a plurality of seat back springs 28 (herein, so-called S springs) are stretched between the left and right side frames 20 so that the seat back pad is elastic from the rear side. Is supported. Further, between the left and right leg portions of the upper frame 22 on the front side of the seat back frame 18, a wire 30 bent in a substantially U shape is stretched, and the upper portion of the seat back pad is extended by the wire 30. It is supported from the rear side.

  A backboard 32 is provided on the back side of the seat back frame 18. The backboard 32 is disposed in a state where the thickness direction is along the front-rear direction of the seatback 16, and is fixed to the upper panel 24 and the lower panel. The back board 32 constitutes a design surface on the back surface of the seat back 16.

  A pair of left and right headrest support brackets 34 are fixed to the upper end portion of the upper frame 22. A headrest support 36 is attached to each of the headrest support brackets 34. These headrest supports 36 correspond to the headrest 14.

  The headrest 14 includes a headrest frame 38 that is a skeleton member. The headrest frame 38 is formed in a substantially inverted U shape by bending a pipe material. A headrest pad (not shown) covered with a headrest skin 40 is attached to the upper side of the headrest frame 38. The lower sides of the left and right legs of the headrest frame 38 protrude downward from the headrest pad, and are inserted into the left and right headrest supports 36 from above. Thereby, the headrest 14 is coupled to the upper end portion of the seat back 16 so as to be relatively movable (slidable) in the vertical direction.

  However, one headrest support 36 is provided with a lock mechanism (not shown) that restricts the relative movement of the headrest 14, and the height of the headrest 14 can be adjusted by operating a release button of the lock mechanism. become. 3A shows a state in which the headrest 14 is positioned at the lower end (lowermost position) of the relative movement range with respect to the seat back 16, and FIG. 3B shows the headrest 14 in the seat back 16. The state located in the upper end (uppermost position) of the relative movement range with respect to is shown.

  Inside the headrest 14, a headrest monitor 42, which is an electrical device, is provided. The headrest monitor 42 is fixed to the headrest frame 38, and the screen is exposed to the rear side of the seat. From the lower end portion of the headrest monitor 42, a harness extraction portion 46 protrudes downward. The harness extraction portion 46 is inserted into the cover 48 from the upper end opening of the cover 48 formed in a rectangular tube shape by a resin material.

  The cover 48 is embedded in the upper part of the seat back 16 with the upper end opening exposed from the upper surface of the seat back 16, and left and right headrest support brackets at the upper end of the upper frame 22 via a bracket 50 made of sheet metal. 34 is fixed. When the height of the headrest 14 is adjusted with respect to the seat back 16, the harness take-out portion 46 moves relative to the cover 48 in the vertical direction.

  From the lower end of this harness extraction part 46, the wire harness 52 for supplying electric power etc. to the headrest monitor 42 is extended below (one side). The wire harness 52 extends downward from the lower end opening (harness outlet) of the cover 48 and is routed in the seat back 16.

  The wire harness 52 extending downward from the lower end opening of the cover 48 has an arcuate lower bent portion 52A (one side bent portion) whose middle portion in the longitudinal direction protrudes downward as viewed from the front and rear direction of the seat back 16. ) And is extended at the upper side (the other side), and is further bent at an arc-shaped upper bent portion 52B (the other side bent portion) that protrudes upward when viewed from the front-rear direction of the seat back 16. It extends to the lower end of the.

  For convenience of explanation below, in the wire harness 52, a portion between the harness extraction portion 46 and the lower bent portion 52A is referred to as a “lower extended portion 52C”, and the lower bent portion 52A and the upper bent portion 52B A portion between the two is referred to as an “upper extending portion 52D”, and a portion routed from the upper bent portion 52B to the lower end portion of the seat back 16 is referred to as a “lower routing portion 52E”.

  In the wire harness 52, an intermediate portion in the longitudinal direction of the upper extension portion 52D is fixed to the front surface of the backboard 32 by a resin intermediate clip 54 (fixing member). An intermediate connector portion 56 is provided on the upper portion of the lower routing portion 52E in the wire harness 52. The intermediate connector portion 56 can be divided into a connector upper portion 56A and a connector lower portion 56B, and the connector lower portion 56B is fixed to the front surface of the backboard 32.

  That is, in the wire harness 52, an intermediate portion in the longitudinal direction of the upper extension portion 52D is fixed to the backboard 32 by the intermediate clip 54, and an intermediate connector portion 56 provided on the upper portion of the lower routing portion 52E is provided in the backboard 32. By being fixed, the lower bent portion 52A and the upper bent portion 52B are held in a state bent in an S shape. However, when the height of the headrest 14 is adjusted with respect to the seat back 16, a portion of the wire harness 52 between the harness extraction portion 46 and the intermediate clip 54 (hereinafter referred to as “movable portion 58”) is the headrest. It deform | transforms with the movement of 14 (refer FIG. 3 (A) and FIG. 3 (B)).

  Here, in this embodiment, since the intermediate clip 54 is positioned below the harness extraction portion 46, the length from the intermediate clip 54 to the lower bent portion 52A in the wire harness 52 as shown in FIG. The length dimension L1 is set shorter than the length dimension L2 of the lower extension 52C. As a result, the movable portion 58 is configured so that the headrest 14 is seated in any of the state where the headrest 14 is located at the lower most position shown in FIG. 3A and the state where the headrest 14 is located at the upper most position shown in FIG. Arrangement is made so as to form a substantially J shape (abbreviated character shape) when viewed from the front-rear direction of the back 16.

  In the present embodiment, the intermediate clip 54 is inclined such that the upper extending portion 52D of the wire harness 52 decreases the bending angle of the lower bending portion 52A with respect to the moving direction (vertical direction) of the headrest 14. In this state, the upper extension 52D is fixed to the backboard 32. Specifically, when viewed from the front-rear direction of the seat back 16, the lower bent portion 52A and the intermediate clip 54 are connected via an imaginary line V1 extending downward from the wire harness 52 take-out portion in the harness take-out portion 46. The upper extending part 52D is inclined so that the virtual line V2 passing through the center of the upper extending part 52D and the virtual line V1 intersect with each other.

(Function and effect)
Next, the operation and effect of this embodiment will be described.

  In the present embodiment, when the headrest 14 moves relative to the seatback 16 upward and downward as the height of the headrest 14 is adjusted, the harness extraction portion 46 provided in the headrest 14 and the harness extraction portion 46 are provided. The distance between the wire harness 52 extending from the intermediate clip 54 that fixes the wire harness 52 to the seat back 16 changes. Thereby, the site | part (movable part 58) between the harness extraction part 46 and the intermediate | middle clip 54 in the wire harness 52 deform | transforms.

  In the movable part 58 of the wire harness 52, the length dimension L1 from the lower bent part 52A to the intermediate clip 54 is set shorter than the length dimension L2 from the lower bent part 52A to the harness extraction part 46. ing. Accordingly, the intermediate clip 54 can restrict the movement of the lower bent portion 52A accompanying the movement of the headrest 14. In addition, the lower bent portion 52A of the wire harness 52 tends to elastically return in a direction in which the lower extended portion 52C of the wire harness 52 moves away from the intermediate clip 54 (the arrow S direction in FIG. 2: one side in the sheet width direction). That is, since the wire harness 52 tries to elastically return in a specific direction, the manner of movement of the wire harness 52 accompanying the movement of the headrest 14 can be stabilized. As a result, it is possible to prevent the wire harness 52 from inadvertently moving in the front-rear direction of the seat back 16 and interfering with other components, so that it is possible to prevent the generation of abnormal noise due to the interference. Moreover, since it is only necessary to fix a part of the wire harness 52 to the backboard 32 with the intermediate clip 54, cost reduction can be achieved.

  In the comparative example shown in FIG. 4, both ends of the lower bent portion 52A of the wire harness 52 are fixed to the backboard 32 by intermediate clips 54, 60, and the lower extended portion 52C provided with a slack is provided. The movable portion 62 is deformed as the headrest 14 moves in the vertical direction. In such a configuration, since the moving direction of the movable part 62 is not stable, the movable part 62 may generate noise due to interference with other parts in the seat back 16, but in this embodiment, The occurrence of such abnormal noise can be prevented.

  In the present embodiment, the intermediate clip 54 is inclined such that the upper extending portion 52D of the wire harness 52 decreases the bending angle of the lower bending portion 52A with respect to the moving direction (vertical direction) of the headrest 14. In this state, the upper extension 52D is fixed to the backboard 32. Thereby, when the movable part 58 of the wire harness 52 deform | transforms with the movement of the headrest 14, it can avoid that the stress which arises in 52 A of lower side bending parts becomes excessive. As a result, the wire harness 52 can be prevented from being deformed in an unspecified direction in order to relieve excessive stress generated in the lower bent portion 52A. Thereby, the way of movement of the wire harness 52 accompanying the movement of the headrest 14 can be further stabilized.

  Further, in the present embodiment, the upper extending portion 52 </ b> D of the wire harness 52 is fixed to the front surface of the backboard 32 by the intermediate clip 54. Since the backboard 32 is provided on the back surface of the seatback 16 in a state where the plate thickness direction is along the front-rear direction of the seatback 16, the backboard 32 has an arc shape that protrudes downward as viewed from the front-rear direction of the seatback 16. The wire harness 52 that is bent at the lower bent portion 52A and extends upward can be fixed to the backboard 32 with a simple configuration. And since a part (upper extension part 52D) of the wire harness 52 is restrained by the back board 32, it can suppress effectively that the wire harness 52 moves in the seat back 16 carelessly.

  In the present embodiment, since the wire harness 52 can be divided at the intermediate connector portion 56, the headrest 14 side portion of the wire harness 52 with respect to the connector upper portion 56 </ b> A can be assembled together with the headrest 14. Thereby, manufacture can be made easy. Moreover, since the intermediate connector portion 56 is provided in the lower routing portion 52E (non-movable portion) of the wire harness 52 and is fixed to the backboard 32, the intermediate connector portion 56 moves inadvertently with other components. It is possible to prevent interference.

(Supplementary explanation of the embodiment)
In the said embodiment, although it was set as the structure by which the intermediate | middle connector part 56 was provided in the downward routing part 52E of the wire harness 52, this invention is not restricted to this, The site | part in which an intermediate connector part is provided in a wire harness can be changed suitably. It is. Further, the wire harness may be configured not to include the intermediate connector portion.

  In the above embodiment, the upper extension 52D of the wire harness 52 is fixed to the backboard 32 in a state in which the upper extension 52D is inclined in the direction of reducing the bending angle of the lower bending portion 52A. However, the upper extension 52D of the wire harness 52 may be fixed to the backboard 32 in a state along the vertical direction of the seat back 16 (the movement direction of the headrest 14).

  In the above embodiment, the wire harness 52 is fixed to the backboard 32 by the intermediate clip 54 (fixing member). However, the present invention is not limited to this, and the component to which the wire harness is fixed in the seat back is provided. The seat back can be changed as appropriate.

  Moreover, in the said embodiment, although the headrest 14 was set as the moving part and the seat back 16 was made into the connection partner, this invention is not limited to this. For example, the seat cushion may be a moving part, and the vehicle body floor part to which the seat cushion is slidably connected may be the connection partner.

  Furthermore, in the said embodiment, although it was set as the structure by which the headrest 14 which is a moving part was connected with the seat back 16 which is a connection partner so that a slide to the upper side and the lower side was carried out, this invention is not limited to this, A moving part May be configured so as to be rotatable (swingable) to one side and the other side with respect to the connection partner.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiment.

12 Seat body 14 Headrest (moving part)
16 Seat back (consolidated partner)
32 Backboard 46 Harness extraction part 52 Wire harness 52A Lower bent part (one side bent part)
52D Upper extension (part extending to the other side)
54 Intermediate clip (fixing member)
56 Intermediate connector

Claims (5)

The moving part is connected so as to be relatively movable to one side and the other side with respect to the connection partner, and a seat main body provided with a harness extraction part in the moving part,
A wire harness that extends from the harness take-out part of the moving part to the one side and that is bent at an arc-shaped one-side bent part that protrudes toward the one side in the longitudinal direction and extends to the other side,
In the state where the moving part is located at either one end or the other end of the relative movement range with respect to the connection partner, the part extending to the other side in the longitudinal intermediate part of the wire harness is more than the one with respect to the harness take-out part. A fixing member for fixing to the connection partner on the side;
Wire harness arrangement structure for vehicle seats equipped with   The fixing member is in a state in which a portion extending to the other side in the longitudinal direction intermediate portion of the wire harness is inclined in a direction in which a bending angle of the one-side bent portion is reduced with respect to a moving direction of the moving portion, The wire harness routing structure for a vehicle seat according to claim 1, wherein a portion extending to the other side is fixed to the connection partner. The connection partner is a seat back,
The moving part is a headrest whose height is adjustable by relative movement with respect to the seat back,
The wire harness extends downward from the harness take-out portion provided in the headrest and is arranged in the seat back, and a longitudinal middle portion projects downward when viewed from the front-rear direction of the seat back. Bends in the arc-shaped one side bend and extends upward,
The wire harness arrangement structure for a vehicular seat according to claim 1 or 2, wherein the fixing member fixes an upper portion of the wire harness extending in the longitudinal direction to the seat back.   A backboard having a thickness direction along the front-rear direction of the seatback is provided on the back surface of the seatback, and the fixing member has a portion extending to the upper side in a longitudinal intermediate portion of the wire harness. The wire harness routing structure for a vehicle seat according to claim 3, which is fixed to the vehicle. The wire harness, through said fixing member and the one side bent portion is dividable at an intermediate connector portion provided on the opposite side, the 請 Motomeko 4, wherein the intermediate connector is Ru is fixed to the backboard Wire harness arrangement structure of the described vehicle seat.

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