JP4757731B2 - Wiring structure for headrest - Google Patents

Description

  The present invention relates to a headrest wiring structure for supplying electricity to a headrest side that can be raised and lowered with respect to a seat back of a vehicle seat.

  When wiring the wire harness to the headrest that can be raised and lowered with respect to the seat back in this way, the wire harness connected to the power source side of the vehicle is guided to the upper part in the seat back and clamped to the seat back frame. . On the other hand, the wire harness connected to the electric actuator incorporated in the headrest is passed through the stay that moves up and down together with the headrest, and is guided to the lower end of the stay. And it is common to provide the connector for connecting both wire harnesses to the lower end part of this stay.

The extra length of the wire harness necessary to absorb the headrest lifting stroke is set in the wire harness positioned between the clamp for the seat back frame and the connector at the lower end of the stay. That is, the connector is arranged at one end of the wire harness having a surplus length.
In addition, about the structure which routes a cable etc. between the headrest side which can be raised / lowered, and the sheet | seat side, the technique disclosed by patent document 1 can be mentioned as a reference.
JP 2004-352165 A

  In the conventional wiring structure, when the portion having the extra length of the wire harness moves up and down due to the raising and lowering of the headrest, the load accompanying it directly acts on the connector and may cause troubles such as disconnection. In order to avoid such trouble, it is conceivable to fix the wire harness with a clamp near the lower end of the stay provided with the connector. However, in the state where the headrest is lowered most together with the stay, it is often difficult to provide the connector and the clamp at the lower end portion of the stay due to space restrictions in the seat back.

  The present invention is intended to solve such a problem, and its purpose is to place a clamp near the lower end of the stay where the connector of the wire harness is provided due to space constraints in the seat back. Even if it is impossible to do so, it is possible to suppress the load on the connector by raising and lowering the headrest.

The present invention is for achieving the above object, and is configured as follows.
1st invention is comprised so that the headrest supported by a pair of stay with respect to a seat back may go up and down with both stays, and the wire harness for supplying electricity to the headrest side is wired through the stay In the headrest wiring structure, a connector for connecting a wire harness extending to the power source side and a wire harness extending to the headrest side is provided near the lower end of one stay that moves up and down together with the headrest . The wire harness extending from the connector to the power source side is guided to the vicinity of the lower end of the other stay that moves up and down together with the headrest and is fixed to the stay side by the first clamp, and is guided from the first clamp to the seat back side. And fixed to the seat back side by the second clamp. The wire harness between the first clamp and the second clamp has a surplus length for absorbing the lift stroke of the headrest.

  In this way, the wire harness extending to the power supply side is guided near the lower end of the stay located on the side opposite to the stay provided with the connector, and the surplus length of this wire harness is set to the first clamp on the headrest side and the seat back. By setting between the second clamp on the side, it is possible to suppress a load from being applied to the connector when the headrest moves up and down. Even if it is impossible to place a clamp near the lower end of the stay where the connector is provided due to space constraints in the seat back, this avoids disconnection at the connector due to the headrest being raised or lowered. can do.

  According to a second invention, in the first invention, there is provided a move which is fixed to the pair of stays and transmits a lifting operation to the headrest. This move is integrally provided with a protective portion below the connector. The protective portion is set to have a shape in which a wire harness extending from the connector to the power supply side projects downward from a portion bent toward the first clamp.

  This protective portion prevents direct interference between the seat back structure and the wire harness when the headrest is lowered most, thereby avoiding a load on the connector.

  In a third aspect based on the second aspect, an opening that is opened at least on the front side of the move is provided in the protective portion provided in the move. The opening is configured such that a connector can be inserted from the front side of the move and that the movement of the connector for connecting the connector to a mating member on the stay side can be guided.

  This facilitates the operation of connecting the connector to the mating member, despite the presence of a protective portion that prevents the wire harness extending from the connector from interfering with the seat back structure.

  In a fourth aspect based on the second or third aspect, the move includes a clamp hole for the first clamp, a plurality of claws for holding a wire harness led from the connector to the first clamp, and the claws. The window part which can confirm the state by which the wire harness was hold | maintained by the part from the back side of a move is provided.

  As a result, the wire harness between the connector and the first clamp need only be routed along the move. In particular, the work of holding the wire harness with the plurality of claws is the work on the back side of the move. However, it can be done easily while checking the situation from the window.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the headrest 10 of the vehicle seat includes a pair of left and right stays 12 and 13 extending downward from the lower surface thereof. The seat back frame 14 includes a pair of left and right support brackets 16 fixed to the upper part thereof. These support brackets 16 have a cylindrical shape that is opened up and down, and both stays 12 and 13 of the headrest 10 are individually inserted through these support brackets 16. Thus, the headrest 10 is supported so as to move up and down with the stays 12 and 13 with respect to the seat back frame 14.

  A move 20 is fixed to the lower portions of the stays 12 and 13 positioned below the support brackets 16 so as to be bridged between them. The move 20 receives a driving force from an elevating drive mechanism (not shown) in the seat back and transmits the elevating operation to the headrest 10 through both stays 12 and 13. 1 shows the front side of the headrest 10, and FIG. 2 shows the back side.

  In the present embodiment, an electric actuator (not shown) is incorporated in the headrest 10, and wiring for connecting the actuator and the power source of the vehicle is necessary. As a specific example of the electric actuator, in the case of an active headrest in which the headrest 10 is divided into a front side and a back side and the front side can be controlled to move in the front-rear direction, it is a motor in its drive mechanism. A wire harness (not shown) connected to the actuator in the headrest 10 is passed through one stay 12 and guided to the lower end of the stay 12.

  The wire harness 40 extending from the vicinity of the lower end of the stay 12 to the power source side is indicated by a virtual line in FIGS. The wire harness 40 is connected to the wire harness connected to the actuator in the headrest 10 by a connector 42 on the lower surface of the coupling portion 22 of the move 20 to which the lower end portion of the stay 12 is coupled. The wire harness 40 is guided downward from the connector 42 and then turned toward the opposite stay 13, and is guided along the move 20 near the lower end of the stay 13. The connector 42 is connected to the end of the wire harness 40 in advance.

  On the front side of the move 20, two claw portions 30 are provided at intervals in the left-right direction, and the wire harness 40 is held in a wiring state along the move 20 by the claw portions 30. Yes. Further, a first clamp 46 is provided at a position where the lower end portion of the stay 13 is coupled to the move 20, and the wire harness 40 is fixed to the move 20 (stay 13 side) by the first clamp 46. Further, the wire harness 40 is guided from the first clamp 46 to the side portion of the seat back frame 14 on the stay 13 side, and is fixed to the seat back frame 14 (seat back side) by the second clamp 48. An extra length portion 40 a corresponding to the lifting stroke of the headrest 10 is set for the wire harness 40 between the first clamp 46 on the move 20 side and the second clamp 48 on the seat back frame 14 side.

Here, the wiring of the wire harness 40 will be described in more detail.
First, the peripheral structure of the connector 42 will be described. As apparent from FIGS. 3 and 4, the connecting portion 22 of the move 20 to which the lower end portion of the stay 12 is connected is provided with a protective portion having a shape protruding downward from the lower surface thereof. 24 is provided. A part of the connector 42 and the wire harness 40 is accommodated in the protective portion 24. Further, the protective portion 24 protrudes downward from the portion of the wire harness 40 that extends downward from the connector 42 in order to protect the portion bent laterally toward the first clamp 46.

  As is clear from FIG. 5, the protective part 24 has an opening 24a opened on the front side thereof, and the connector 42 can be inserted through the opening 24a, and the wire harness passes through the opening 24a. 40 is guided to the front side of the move 20. The lower surface of the opening 24a is a guide surface 24b inclined with respect to the vertical direction. The guide surface 24 b guides the movement of the connector 42 inserted from the opening 24 a, and can guide the connector 42 toward the through hole 23 formed in the bottom of the coupling portion 22 in the move 20. In addition, the protection part 24 has another opening part 24c opened on the back side facing the opening part 24a.

  The through hole 23 of the coupling part 22 has a guide surface 23a provided in a part of the inner peripheral surface and a groove 23b provided in another part of the inner peripheral surface. The guide surface 23 a is set to have substantially the same inclination as the guide surface 24 b of the protection portion 24, and the groove 23 b is set to a dimension that engages with a convex portion on the outer surface of the connector 42. Further, as shown in FIG. 5, a holder 44 (a mating member on the stay 12 side) is connected to the wire harness (not shown) extending to the actuator side in the headrest 10 and connects the connector 42 inside the coupling portion 22. It has been.

  As shown in FIG. 5, the connector 42 inserted from the opening 24 a of the protection part 24 is guided by the guide surface 24 b of the protection part 24 and enters the through hole 23 of the coupling part 22. Thereafter, the connector 42 changes its direction in the vertical direction along the guide surface 23a of the through hole 23, and proceeds in a state in which it is positioned in the left-right direction by the engagement between the convex portion on the outer surface and the groove 23b. As a result, the connector 42 is accurately connected to the holder 44.

Thus, when the connector 42 is connected to the holder 44, the protective portion 24 is provided below the coupling portion 22 of the move 20, and the connector 42 is inserted despite the connector 42 being inserted from the front side of the protective portion 24. Can be accurately coupled to the holder 44. The opening 24c on the back side of the protection part 24 serves to release the connector 42 when changing the direction in the vertical direction so that it does not interfere with the protection part 24, and the movement of the connector 42 to be inserted depending on the work situation. It also serves as a window for confirming from the back side of the move 20.

  Next, the two claw portions 30 that hold the wire harness 40 in the wiring state along the move 20 and the peripheral structure thereof will be described. As apparent from FIGS. 3 and 4, a flange 28 projecting forward is provided in a predetermined range in the left-right direction at the lower part on the front side of the move 20. On the front side of the flange 28, two claw portions 30 are provided at intervals in the left-right direction. Therefore, a space for passing the wire harness 40 is secured between the claw portions 30 and the front wall of the move 20. In addition, window portions 32 are opened on the front wall of the move 20 at locations facing both the claw portions 30.

  When wiring the wire harness 40 guided from the connector 42 to the first clamp 46, the wire harness 40 is pushed into the space between the front wall of the move 20 and both the claw portions 30 from above. As a result, the wire harness 40 is received by the flange 28 and is sandwiched between the front wall of the move 20 and the both claws 30. Moreover, the edge part shape of both the nail | claw parts 30 is a claw which prevents that the wire harness 40 slips out upwards. With these configurations, the wire harness 40 wired along the front surface of the move 20 is held so as not to be easily detached, and the wiring work is easy. Further, even when this wiring work is performed from the back side of the move 20, it is possible to confirm the fitting state of the wire harness 40 with respect to both the claw portions 30 from the individual window portions 32.

  Next, the first clamp 46 and the second clamp 48 will be described. The first clamp 46 is fixed by inserting a clip 47 into a clamp hole 26 opened at a position where the lower end of the stay 13 is coupled in the move 20. The wire harness 40 is held by the clip 47, and as a result, the wire harness 40 is fixed to the move 20 side. As shown in FIGS. 1 and 2, the second clamp 48 is fixed by inserting a clip 49 into a clamp hole 18 formed in the seat back frame 14. By holding the wire harness 40 on the clip 49, the wire harness 40 is fixed to the seat back frame 14.

  When the headrest 10 moves up and down together with both the stays 12 and 13 and the move 20, the wire harness 40 wired between the fixed-side seatback frame 14 and the movable-side move 20 has an up-and-down stroke at the extra length portion 40a. Absorbs. Since both ends of the extra length portion 40a are the first clamp 46 and the second clamp 48, even if the extra length portion 40a moves up and down by the elevation of the headrest 10 at these locations, a load is applied to the connector 42. There is no such a risk. Therefore, the trouble by the disconnection etc. in the location of the connector 42 by raising / lowering of the headrest 10 is eliminated.

  As already described, the connector 42 and a part of the wire harness 40 that follows the connector 42 are accommodated in the protective part 24, and the protective part 24 is below the bent part of the wire harness 40 that follows the connector 42. Protruding to Thereby, when the headrest 10 is moved down most, the wire harness 40 is prevented from directly interfering with the seat back structure (backboard or the like) even if the protective portion 24 interferes. . This also prevents the connector 42 from being loaded through the wire harness 40.

  In the present embodiment, the target for supplying electricity to the headrest 10 side is not limited to the electric actuator in the headrest 10, and for example, various sensors incorporated in the headrest 10, a display, a speaker, an air conditioner, etc. In some cases. The counterpart member that fixes the wire harness 40 with the first clamp 46 may be the lower end of the stay 13 instead of the move 20. On the other hand, it is also possible to fix the wire harness 40 to a member other than the seat back frame 14 on the seat back side with respect to the second clamp 48.

Front view showing headrest with seat back frame Rear view showing headrest with seat back frame The perspective view showing the part of the move in the headrest Sectional view in the direction of arrow AA in FIG. Enlarged cross-sectional view showing the joint on one side of the move

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Headrest 12, 13 Stay 14 Seat back frame 18 Clamp hole 20 Move 24 Protection part 26 Clamp hole 40 Wire harness 40a Extra length part 42 Connector 46 1st clamp 48 2nd clamp

Claims (4)

A headrest wiring structure in which a headrest supported by a pair of stays with respect to a seat back is raised and lowered together with both stays, and a wire harness for supplying electricity to the headrest side is routed through the stays. And
A connector for connecting a wire harness extending to the power supply side and a wire harness extending to the headrest side is provided near the lower end of one stay that moves up and down together with the headrest , and the wire harness extending from the connector to the power supply side moves up and down together with the headrest. The first stay is led to the vicinity of the lower end of the other stay and fixed to the stay by the first clamp, and the first clamp is led to the seat back and fixed to the seat back by the second clamp. A wiring structure for headrest in which a surplus length for absorbing the lifting stroke of the headrest is secured in the wire harness between the first clamp and the second clamp. The headrest wiring structure according to claim 1,
The move is provided with a move that is fixed to a pair of stays in the headrest and transmits the raising / lowering operation to the headrest. The move is integrally provided with a protection part below the connector, and the protection part includes a wire harness that extends from the connector to the power supply side. A wiring structure for a headrest that is set in a shape protruding downward from a portion bent toward a clamp. The wiring structure for a headrest according to claim 2,
An opening that is open at least on the front side of the move is provided in the protective part provided on the move, and the connector can be inserted into the opening from the front side of the move. A headrest wiring structure configured to be able to guide the movement of the connector for connecting to a mating member on the side. A wiring structure for a headrest according to claim 2 or 3,
The move has a clamp hole for the first clamp, a plurality of claw portions for holding the wire harness guided from the connector to the first clamp, and a state in which the wire harness is held by these claw portions on the back side of the move A wiring structure for a headrest having a window portion that can be confirmed from the head.

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