JP2006341645A - Headrest for vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest for a vehicle seat which makes a wire harness difficult to damage and also shows a good appearance. <P>SOLUTION: A headrest stay 3 is inserted in the insertion hole 4e of a stay cover 4. The distal end section of the headrest stay 3 which has gone through the insertion hole 4e is inserted in a seat back 7. The headrest body 2 is vertically moved to the seat back 7 by changing the insertion quantity. When the headrest body 2 is vertically moved, the upper end section of the stay cover 4 which continues staying still to the seat back 7 side is housed in the headrest body 2 in a manner to be able to appear/disappear for this headrest 1. The wire harness 6 is used to electrically connect an electric instrument which is provided on the headrest body 2 with a wiring member 9 being provided on the seat back 7 side. The wire harness 6 is made to pass through a space between the hole wall surface of the insertion hole 4e of the stay cover 4 and the headrest stay 3. Then, a fastening section 4c which is fastened to the seat back 7 is provided on the stay cover 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a headrest for a vehicle seat. In particular, the present invention relates to a headrest for a vehicle seat having a headrest body, a rod-like headrest stay extending from the headrest body, and a stay cover for covering the headrest stay.

Conventionally, for example, a headrest described in Patent Document 1 is known.
The headrest described in Patent Literature 1 includes a headrest body, a headrest stay, and a stay cover. The stay cover has a cylindrical shape and is attached to the headrest body so as to be able to appear and retract. The stay cover has a cylindrical hole, and a coil spring that urges the stay cover downward is provided in the cylindrical hole. The headrest stay is inserted into the cylindrical hole of the stay cover, and the leading end that penetrates the cylindrical hole is inserted into the seat back. The headrest body moves up and down with respect to the seat back by changing the amount of insertion. The stay cover is always pressed against the upper surface of the seat back by a coil spring. Therefore, the stay cover always remains stationary with respect to the seat back even when the headrest body is moved up and down. Then, the stay cover appears and disappears with respect to the headrest body.

Conventionally, a headrest 101 shown in FIG. 9 is also known. As shown in FIG. 9, the headrest 101 is configured to electrically connect the electrical device 105 provided on the headrest body 102 and the wiring member 109 provided on the seat back 107, and to cover the wire harness 106. The harness cover 104 is provided.
The harness cover 104 is disposed between the headrest main body 102 and the seat back 107 and is disposed at a substantially intermediate position between the two headrest stays 103. The harness cover 104 has a bellows-like shape and is configured to expand and contract up and down, and expands and contracts in the vertical direction by moving the headrest body 102 up and down. The wire harness 106 was passed through the cylindrical hole of the harness cover 104.
Japanese Utility Model Publication No. 1-139553

However, as shown in FIG. 9, two headrests 101 and one harness cover 104 appear between the seat back 107 and the headrest body 102. Therefore, there is a problem that the appearance between the seat back and the headrest body is not good, or the view from the rear to the front is not good.
By the way, when providing a wire harness in the headrest of patent document 1, the form of letting a wire harness pass through the cylinder hole of a stay cover can also be assumed. However, a coil spring is accommodated in the cylindrical hole of the stay cover. Therefore, when the headrest body is moved up and down, the wire harness may be caught between the coil springs, and the wire harness may be damaged.
Then, this invention makes it a subject to provide the headrest of the vehicle seat with which a wire harness is hard to be damaged and is good-looking.

In order to solve the above-mentioned problems, the present invention is a headrest for a vehicle seat having the structure described in each claim.
According to the first aspect of the present invention, there is provided a headrest for a vehicle seat having a headrest body, a headrest stay, and a stay cover, and the headrest stay being inserted into the insertion hole of the stay cover, the electric rest provided on the headrest body. A wire harness for electrically connecting the device and a wiring member provided on the seat back side is passed between the hole wall surface of the insertion hole of the stay cover and the headrest stay. The stay cover is provided with an engaging portion that engages with the seat back.

Therefore, the wire harness is wired between the headrest body and the seat back in a state where the wire harness is covered with the stay cover. Therefore, it is not necessary to provide a special member for covering the wire harness between the seat back and the headrest body. Therefore, the appearance between the seat back and the headrest body is improved. And the visibility from the rear to the front is also improved. For example, conventionally, since the harness cover 104 is provided as shown in FIG. 9, one harness cover 104 appears between the seat back 107 and the headrest body 102 in addition to the two headrests 101. . On the other hand, in the present invention, since it is not necessary to provide the harness cover 104, only the stay cover that covers the headrest appears. Therefore, aesthetics and forward visibility can be better than the previous ones.
The stay cover has an engaging portion and is engaged with the seat back by the engaging portion. Therefore, it is not necessary to provide a coil spring for urging the stay cover to the seat back as in Patent Document 1. Therefore, the problem that the wire harness is damaged by the coil spring does not occur.

According to the invention described in claim 2, two headrest stays are arranged side by side in the seat width direction in the headrest body. The stay cover is integrally formed of two left and right cylindrical portions having insertion holes through which the headrest stays are inserted, a bridging portion that bridges the lower ends of the two left and right cylindrical portions, and an engaging portion formed in the bridging portion. And a wire harness is passed through at least one of the two cylindrical portions.
Accordingly, the two headrest stays are each covered with the cylindrical portion of the stay cover. Therefore, the overall aesthetics of the headrest is improved by hiding the two headrest stays.
The stay cover integrally has a bridging portion for bridging each cylindrical portion and an engaging portion. Therefore, each part of the stay cover can be attached to the seat back at a time. In addition, the number of engaging portions to be engaged with the seat back can be reduced as compared with a mode in which each cylindrical portion is separately attached to the seat back.

A headrest 1 according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the headrest 1 includes a headrest main body 2, two rod-like headrest stays 3, and a stay cover 4 for hiding the headrest stays 3.
The headrest body 2 is an active headrest that includes a front element 10, a rear element 20, and a driving device 5 as shown in FIGS. 3 and 4, and the front element 10 moves back and forth with respect to the rear element 20.

As shown in FIG. 2, the front element 10 is formed by laminating a panel 11, a urethane pad 12, a sensor 60, and a slam pad 13 and covering them with a skin (not shown in FIG. 2).
The sensor 60 is a sensor that detects the distance between the head of the passenger and the headrest body 2. For example, it is a touch sensor that detects that the headrest body 2 is in contact with the head, or a capacitance sensor that detects the distance between the headrest body 2 and the head.

As shown in FIG. 2, the rear element 20 includes a back panel 21, a skin covering the back surface of the back panel 21 (not shown in FIG. 2), and two hooking members 24 attached to the bottom surface of the back panel 21. is doing.
The latch member 24 is a member that prevents the stay cover 4 from falling off the rear element 20, and includes a latch portion 24b and a stopper 24a. The latching portion 24 b is latched on the hole edge of the hole 21 a formed on the bottom surface of the back panel 21. The stopper 24a prevents the retaining portion 4d of the stay cover 4 through which the retaining member 24 is inserted from coming off. Accordingly, the stay cover 4 is connected to the hooking member 24 in a state of being prevented from coming off (see FIG. 5).

The drive device 5 is a device that moves the front element 10 back and forth with respect to the rear element 20, and includes a front member 51 that holds the front element 10, a rear member 52 that holds the rear element 20, and these A link mechanism 53 and a motor 55 are provided between them.
The link mechanism 53 is an X link mechanism, and is driven by a motor 55 attached to the rear member 52 to move the front member 51 in the front-rear direction with respect to the rear member 52.

A control unit 50 is provided between the front member 51 and the front element 10.
The control unit 50 is an ECU or the like, and as shown in FIG. 2, a wire harness 6, a sensor wiring 61, and a driving device wiring 62 are connected to the control unit 50.
The wire harness 6 is a wiring member connected to the wiring member 9 provided on the seat back 7 (see FIG. 1), and the wiring member 9 is connected to the collision prediction sensor and the vehicle battery. The wire harness 6 extends between the headrest body 2 and the seat back 7 by passing through the stay cover 4.
As shown in FIG. 2, the sensor wiring 61 electrically connects the control unit 50 and the sensor 60. The driving device wiring 62 electrically connects the control unit 50 and the motor 55.
The driving device 5, the control unit 50, and the sensor 60 are members corresponding to “Electrical equipment” recited in the claims.

The operation of the active headrest will be described below.
When the collision prediction sensor issues a signal by predicting a vehicle collision, the signal is received by the control unit 50. And the control part 50 supplies electric power to the drive device 5, and the drive device 5 moves the front element 10 ahead toward the passenger | crew's head. When the distance between the front element 10 and the head of the occupant becomes a predetermined distance or less, or when the distance between the front element 10 and the occupant's head contacts the occupant's head, the sensor 60 generates a signal and the signal is received by the control unit 50. And the control part 50 stops the electric power supply to the drive device 5, and stops the drive device 5. FIG. As a result, the front element 10 stops at a predetermined position. Thus, the headrest 1 protects the occupant's head.

As shown in FIG. 2, the headrest main body 2 also has a member that hides a gap generated when the front element 10 moves forward with respect to the rear element 20. That is, it has a horizontal gap member 22 for hiding the horizontal gap, upper gap members 14 and 23 for hiding the upper gap, and lower gap members 15 and 25 for hiding the lower gap.
The lateral gap member 22 is attached to the back panel 21. The lateral gap member 22 hides the lateral gap of the headrest body 2 in cooperation with the lateral gap concealment portion 11a formed in the panel 11 when the front element 10 moves forward with respect to the rear element 20.
Of the upper gap members 14 and 23 and the lower gap members 15 and 25, one member (14, 15) is attached to the panel 11 side, and the other member (23, 25) is attached to the back panel 21 side. These cooperate to hide the upper gap and the lower gap of the headrest body 2.

  As shown in FIG. 2, the headrest stay 3 has a rod shape (for example, a cylindrical rod shape) and is fixed to the rear member 52. As shown in FIG. 1, two headrest stays 3 are juxtaposed in the seat width direction and extend from the headrest body 2 toward the seatback 7.

As shown in FIG. 2, the stay cover 4 integrally includes two cylindrical portions 4a, a bridging portion 4b that bridges the lower ends of the two cylindrical portions 4a, and a plurality of (for example, two) engaging portions 4c. ing.
The cylinder portion 4a has an insertion hole 4e through which the headrest stay 3 is inserted, and has a retaining portion 4d formed in a flange shape at the upper end portion.
As shown in FIG. 7, the insertion hole 4e has an elongated cross-sectional shape, and the headrest stay 3 is inserted closer to one longitudinal side of the elongated hole, and the wire harness 6 is passed closer to the other side.

As shown in FIG. 5, the tubular portion 4 a is inserted into the latch member 24 and is housed in a retractable manner in the housing portion 2 a of the headrest body 2. The cylindrical portion 4 a is prevented from coming off from the headrest body 2 by the hooking member 24.
The bridging portion 4b extends in the seat width direction and covers part of the upper surface of the seat back 7 as shown in FIGS.

As shown in FIG. 2, the engaging portion 4c is formed at both left and right ends of the bridging portion 4b. As shown in FIG. 5, the engaging portion 4c projects to the bottom surface of the stay insertion member 7d provided on the seat back 7, and engages with the stay insertion member 7d. Therefore, the stay cover 4 is engaged with the seat back 7 by the engaging portion 4c.
The stay cover 4 is molded using a resin material, an aluminum material, or the like having excellent aesthetics as a raw material.

As shown in FIG. 1, the seat back 7 has a frame 7a, a cushion 7b supported by the frame 7a, and a skin 7c covering the cushion 7b.
As shown in FIG. 8, a stay insertion member 7 d into which the headrest stay 3 is inserted and a vertical drive device 8 that moves the headrest 1 up and down are attached to the frame 7 a.
The stay insertion member 7d is cylindrical and is attached to the upper end edge of the frame 7a, and the headrest stay 3 is inserted into the cylindrical hole. Therefore, the headrest stay 3 is supported by the stay insertion member 7d so that the intermediate portion can slide.

The vertical drive device 8 includes a support member 8b and an actuator 8a.
The support member 8 b is inserted with the lower end portions of the two headrest stays 3 and supports the lower end portions of the two headrest stays 3.
The actuator 8a is attached to the frame 7a and moves the support member 8b up and down using electric power. Therefore, the headrest body 2 moves between the upper position shown in FIG. 5 and the lower position shown in FIG. 6 via the vertical drive device 8 and the headrest stay 3.

Below, the state which moved the headrest main body 2 between the upper position and the lower position is demonstrated.
As shown in FIGS. 5 and 6, the headrest body 2 and the headrest stay 3 move up and down together with respect to the seat back 7. On the other hand, the stay cover 4 is attached to the upper surface of the seat back 7 and remains stationary with respect to the seat back 7. In the stay cover 4, the cylindrical portion 4 a which is a part of the stay cover 4 protrudes and retracts from the storage portion 2 a of the headrest 1.

Next, a method for handling the wire harness 6 and a method for connecting the wire harness 6 and the wiring member 9 will be described.
As shown in FIG. 1, the wire harness 6 is connected to the headrest body 2 and the seat in order to connect an electrical device such as the driving device 5 provided in the headrest body 2 and the wiring member 9 provided on the seat back 7 side. It is routed between the back 7. And the wire harness 6 is passed through the insertion hole 4e of the cylinder part 4a of the stay cover 4 provided between the headrest main body 2 and the seat back 7, as shown in FIG. Specifically, as shown in FIG. 7, it passes through a gap formed between the hole wall surface of the cylindrical portion 4 a of the stay cover 4 and the outer peripheral surface of the headrest stay 3. Accordingly, the wire harness 6 extends between the headrest body 2 and the seat back 7 in a state where the wire harness 6 is covered with the stay cover 4.

  The wiring member 9 is routed on the seat back 7 side as shown in FIG. The wiring member 9 is pulled out above the seat back 7 through the harness insertion member 7e attached to the upper edge of the frame 7a. A connector 9 a is attached to the drawn leading end, and the connector 9 a is connected to a connector 6 a attached to the leading end of the wire harness 6.

Next, a method for assembling the headrest 1 and a method for attaching the headrest 1 to the seat back 7 will be described.
First, the headrest stay 3 is attached to the driving device 5 (see FIG. 2), and the front element 10 and the rear element 20 are assembled to the driving device 5. Then, the headrest stay 3 is inserted into each insertion hole 4 e of the stay cover 4, and the stay cover 4 is attached to the rear element 20 in this state. As a result, the components of the headrest 1 are assembled together.

Next, the headrest stay 3 is inserted into the stay insertion member 7d, and the lower end portion of the headrest stay 3 is attached to the support member 8b (see FIG. 8).
Next, the stay cover 4 is lifted, and the wire harness 6 and the wiring member 9 are joined.
Thereafter, the stay cover 4 is lowered, the engaging portion 4c is engaged with the stay insertion member 7d, and the stay cover 4 is engaged with the seat back 7. As a result, the connectors 6a and 9a and the harness insertion member 7e are covered and hidden by the bridging portion 4b as shown in FIG. 5, and the headrest 1 is engaged with the seat back 7.

The headrest 1 is configured as described above.
That is, the wire harness 6 is passed between the hole wall surface of the insertion hole 4 e of the stay cover 4 and the headrest stay 3 as shown in FIGS. The stay cover 4 is provided with an engaging portion 4 c that is engaged with the seat back 7.

Therefore, the wire harness 6 is wired between the headrest body 2 and the seat back 7 in a state of being covered and hidden by the stay cover 4 as shown in FIG. Therefore, it is not necessary to provide a special member for covering the wire harness 6 between the seat back 7 and the headrest body 2. Therefore, the appearance between the seat back 7 and the headrest body 2 is improved. And the visibility from the rear to the front is also improved. For example, conventionally, since the harness cover 104 is provided as shown in FIG. 9, one harness cover 104 appears between the seat back 107 and the headrest body 102 in addition to the two headrests 101. On the other hand, in this embodiment, since it is not necessary to provide the harness cover 104, only the stay cover 4 that covers the headrest 1 appears. Therefore, aesthetics and forward visibility are superior to the previous ones.
Further, the stay cover 4 has an engaging portion 4c as shown in FIG. 5, and is engaged with the seat back 7 by the engaging portion 4c. Therefore, it is not necessary to provide a coil spring for urging the stay cover to the seat back as in Patent Document 1. Therefore, the problem that the wire harness 6 is damaged by the coil spring does not occur.

In addition, as shown in FIG. 1, the headrest body 2 has two headrest stays 3 arranged in parallel in the seat width direction. The stay cover 4 is formed in two left and right tube portions 4a having insertion holes 4e through which the headrest stays 3 are inserted, a bridge portion 4b that bridges the lower ends of the two left and right tube portions 4a, and a bridge portion 4b. The engaging portion 4c is integrally formed, and the wire harness 6 is passed through at least one of the two cylindrical portions 4a.
Accordingly, the two headrest stays 3 are each covered with the cylindrical portion 4 a of the stay cover 4. Therefore, the overall aesthetics of the headrest 1 are improved by hiding the two headrest stays 3.
The stay cover 4 integrally includes a bridging portion 4b that bridges the cylindrical portions 4a and an engaging portion 4c. Therefore, each part of the stay cover 4 can be attached to the seat back 7 at a time. In addition, the number of engaging portions 4c to be engaged with the seat back 7 can be reduced as compared with a configuration in which each cylindrical portion 4a is attached to the seat back 7 separately. For example, it can be two.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) For example, the headrest main body 2 according to the above-described embodiment is provided with an electric device such as the driving device 5 as shown in FIG. However, another electric device such as a television monitor, a speaker, or a mobile phone may be provided on the headrest body, and a wire harness may be connected to the electric device.
(2) The stay cover 4 according to the above embodiment has the engaging portion 4c as shown in FIG. 8, and the engaging portion 4c is engaged with the stay insertion member 7d. However, the engaging part 4c may be engaged with another member provided on the seat back 7 side.
(3) As shown in FIGS. 5 and 6, the stay cover 4 according to the above embodiment is configured such that only the cylindrical portion 4a on the upper end side of the stay cover 4 is retractable with respect to the headrest body. It was. However, the entire stay cover may be housed so as to be able to appear and retract with respect to the headrest body.

It is a perspective view from the front side of a headrest. It is a disassembled perspective view of a headrest. It is a perspective view from the back side of a headrest. It is a perspective view from the back side of a headrest. FIG. 2 is a partially enlarged view of a cross section taken along line AA in FIG. 1. FIG. 6 is a view corresponding to FIG. 5 when the headrest is in the lower position. FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. It is a front side perspective view of a headrest in the middle of assembling to a seat back. It is a perspective view from the front side of the conventional headrest.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 ... Headrest 2,102 ... Headrest main body 2a ... Storage part 3,103 ... Headrest stay 4 ... Stay cover 4a ... Cylindrical part 4b ... Bridging part 4c ... Engagement part 4d ... Stopping part 4e ... Insertion hole 5 ... Drive device (Electrical equipment)
6, 106 ... wire harnesses 6a, 9a ... connectors 7, 107 ... seat back 8 ... vertical driving devices 9, 109 ... wiring member 10 ... front element 20 ... rear element 24 ... latching member 50 ... control part 51 ... front side Member 52 ... Rear member 53 ... Link mechanism 55 ... Motor 60 ... Sensor 104 ... Harness cover 105 ... Electrical equipment

Claims (2)

A headrest main body, a rod-shaped headrest stay extending from the headrest main body, and a stay cover for covering the headrest stay; the headrest stay is inserted into the insertion hole of the stay cover; Inserting the penetrating tip of the headrest stay into the seat back and changing the amount of insertion to move the headrest main body up and down relative to the seat back, and when the headrest main body moves up and down, The headrest of the vehicle seat that is stored in the headrest main body so that at least the upper end side of the stay cover that remains stationary with respect to the headrest body
A wire harness for electrically connecting an electrical device provided on the headrest body and a wiring member provided on the seat back side is passed between the hole wall surface of the insertion hole of the stay cover and the headrest stay. ,
A headrest for a vehicle seat, wherein the stay cover is provided with an engaging portion that engages with the seat back. The vehicle seat headrest according to claim 1,
The headrest body has two headrest stays arranged side by side in the seat width direction.
The stay cover includes two left and right tube portions having insertion holes through which the headrest stays are inserted, a bridging portion that bridges the lower ends of the two left and right tube portions, and an engaging portion formed in the bridging portion. A headrest for a vehicle seat, which is integrally formed and has a configuration in which a wire harness is passed through at least one of the two cylindrical portions.

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