JPH10290728A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the height position of a headrest to an optimum state. SOLUTION: A headrest displacement mechanism is provided inside a seat back 2 and a supporting stay 9 is pulled in a lower direction by a wire 14 when a seat cushion is slid forward. Also, the supporting stay 9 is energized in an upper direction by a coil spring 11 at all times. Thus, the headrest 3 is automatically adjusted in the lower direction when the sitting person of a low height adjusts the seat cushion forward and the headrest 3 is automatically adjusted in the upper direction when the sitting person of a tall height adjusts the seat cushion backward. Thus, the height position of the headrest 3 is turned to the optimum state at all times corresponding to the height of the sitting person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle seat provided with a headrest.

[0002]

2. Description of the Related Art Generally, a vehicle seat is provided with a headrest at an upper end of a seat back. The headrest is supported by a support stay, and its height can be adjusted according to the position of the head of the seated person. In the vehicle seat, the seat cushion is configured to be slidable in the front-rear direction, and after seating, by operating the operation lever, the position of the seat cushion in the front-rear direction can be adjusted according to the height of the occupant. It has become.

[0003]

Conventionally, however, the work of adjusting the height of the headrest and the work of adjusting the position of the seat cushion must be performed separately. Therefore, the height position of the headrest, which is relatively troublesome to adjust, has hardly been adjusted. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle seat in which a height position of a headrest is always in an optimum state.

[0004]

In order to achieve the above object, a vehicle seat according to a first aspect of the present invention has a seat cushion configured to be slidable in the front-rear direction and a headrest provided above a seat back. The seat includes a headrest displacement mechanism that displaces the headrest in the vertical direction in conjunction with the sliding movement of the seat cushion in the front-rear direction. The headrest is displaced downward in response to the sliding movement of the seat cushion in the forward direction. The headrest is characterized in that the headrest is displaced upward with respect to the backward sliding operation.

According to a second aspect of the present invention, in the vehicle seat according to the first aspect, the headrest displacement mechanism supports the bracket fixed to the seat back frame and the headrest, and is slidable up and down on the bracket. A support stay provided so as to be connected to the support stay, one end of which is connected to the support stay, and the other end of which is inserted into the seat back, protrudes from the lower end of the seat back and is fixed to the floor surface, and is fixed to the front of the seat cushion. It is characterized in that it comprises a wire that pulls the support stay downward in accordance with the sliding operation, and an urging member that urges the support stay upward.

According to a third aspect of the present invention, in the vehicle seat according to the second aspect, the lower end of the support stay is slidably fitted into the cylindrical body, and one end of a wire is connected to the cylindrical body. The feature is that the height position of the headrest is configured to be finely adjustable.

[0007]

According to the first aspect of the present invention, when the seat cushion is slid forward, the headrest is displaced downward. When the seat cushion is slid backward, the headrest is displaced upward. In other words, a person with a short height generally adjusts the seat cushion forward, and in conjunction with this, the height position of the headrest is adjusted downward. In addition, a person with a large height generally adjusts the seat cushion backward, and in conjunction with this, the height position of the headrest is adjusted upward. Therefore, the height position of the headrest can always be automatically adjusted to the optimum position according to the height of the occupant.

According to the second aspect of the present invention, when the seat cushion is slid forward, the headrest is pulled downward against the urging force from the urging member. When the seat cushion is slid backward, the headrest is displaced upward by the urging force from the urging member. Therefore,
As described above, the height position of the headrest can always be automatically adjusted to an optimum position in accordance with the height of the occupant.

According to the third aspect of the present invention, since the lower end portion of the support stay is slidably fitted into the cylindrical body, the height position of the headrest is adjusted in conjunction with the adjustment operation of the seat cushion. Furthermore, the height position of the headrest can be finely adjusted. Therefore, the height position of the headrest can be adjusted to a more optimal position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a vehicle seat according to the present invention will be described below with reference to FIGS. As shown in FIG. 5, the vehicle seat of this embodiment includes a seat cushion 1 as a seating portion and a seat back 2 as a backrest portion, and a headrest 3 is provided at an upper end portion of the seat back 2. ing.

As shown in FIG. 4, the seat cushion 1 is provided on two guide rails 4 attached to the floor surface, and extends along the guide rails 4 in the front-rear direction (the direction of the arrow in FIG. 4). It is possible to slide.

The seat back 2 is constructed by attaching a pad (not shown) to a seat back frame 5 and wrapping the pad with a cover. This seat back frame 5
Is formed in a gate shape, and a plate 6 is mounted on an upper end portion between the left and right frame portions 5A, and a plurality of springs 16 are mounted below the plate 6. Further, two short cylindrical brackets 7 are welded vertically at appropriate intervals near the center of the upper frame portion 5B.

As shown in FIG. 1 and FIG. 3, a long cylindrical body 8 is fitted to the bracket 7 so as to move up and down from below, and the long cylindrical body 8 supports the headrest 3 from above. Stay 9 is fitted. A screw 8A is formed at the upper end of the long cylindrical body 8, and the groove is cut at equal angles from the opening edge of the long cylindrical body 8 so that the long cylindrical body 8 is divided into four in the circumferential direction, and the front end side is slightly expanded. I have. A nut 10 is fitted into the upper end of the elongated cylinder 8, and the support stay 9 is tightened and fastened to fix the elongated cylinder 8, and is loosened so that the support stay 9 is slidable in the vertical direction. You. This configuration is a fine adjustment mechanism.

A flange portion 8B is formed so as to protrude at a substantially central portion in the longitudinal direction of the long cylindrical body 8, and a coil spring 11 is fitted into a lower portion thereof.
Of the above-mentioned plate pieces 6, the upper plate piece 6 is provided with a protruding piece 12 on the surface thereof corresponding to the lower end position of the long cylindrical body 8, and the protruding piece 12 is formed through the insertion hole 12A. The coil spring 11 is sandwiched between the protruding piece 12 and the flange portion 8B while projecting the lower end of the cylindrical body 8. Further, a connection projection 13 is formed at the lower end of the long cylindrical body 8 protruding from the insertion hole 12A, and one end of the wire 14 of the push-pull cable is connected thereto.

One end of a tube 15 of the push-pull cable is fixed to a portion of the upper plate 6 below the protruding piece 12. As shown in FIG. 4, the tube 15 extends downward from the plate piece 6, extends to the back side across the spring 16, further extends to the lower end portion of the seat back 2, and has the other end portion. Is fixed. Then, a wire 14 having one end connected to the lower end of the long cylindrical body 8 projects through the tube 15 from the lower end of the seat back 2 to the rear, and the other end of the protruding wire 14 is connected to the guide rail 4. It is also screwed to the floor. Thus, when the seat back 2 slides forward together with the seat cushion 1, the wire 14 is pulled backward. For this reason, the support stay 9 moves downward while compressing the coil spring 11 together with the long cylindrical body 8 (FIG.
(Middle, arrow direction). Also, when the seat back 2 slides rearward together with the seat cushion 1,
The compressed coil spring 11 returns to its original state, and the support stay 9 slides upward (in the direction of the arrow in FIG. 1) together with the long cylindrical body 8. This configuration corresponds to the headrest displacement mechanism of the present invention.

The headrest 3 is constructed by attaching a pad (not shown) to the frame plate 17 and wrapping the pad with a cover. The support stays 9 are welded to the frame plate 17 at both left and right ends with the lower end protruding from the lower surface.

Next, the operation of the present embodiment will be described.
A short occupant generally adjusts the seat cushion 1 forward. That is, the seat cushion 1 is slid forward (to the left in FIG. 5) by operating an operation lever (not shown). Then, since the seat back 2 slides forward together with the seat cushion 1, the wire 14 in the tube 15 is pulled backward. Therefore, the support stay 9 slides downward along the bracket 7 while compressing the coil spring 11 together with the long cylindrical body 8 (see FIG. 2). Therefore, the height position of the headrest 3 is adjusted downward according to the height of the occupant (see the state shown by the two-dot chain line in FIG. 5).

A tall occupant generally adjusts the seat cushion 1 rearward. That is, the seat cushion 1 is slid rearward (to the right in FIG. 5) by operating an operation lever (not shown). Then, the wire 14 that has been pulled rearward becomes loose, and the coil spring 11 in the compressed state returns to the original state. Therefore, the flange portion 8B of the long cylinder 8 is lifted upward by the elastic force of the coil spring 11, and the support stay 9 slides upward together with the long cylinder 8 (see FIG. 1). Therefore, the height position of the headrest 3 is adjusted upward according to the height of the occupant (see the state shown by the solid line in FIG. 5).

After the height of the headrest 3 is adjusted together with the seat cushion 1 by the above operation,
In some cases, you may want to fine-tune this to its optimal position. This is because there is some individual difference in the relationship between the height of the seated person and the position of the head. In such a case, the nut 10 may be loosened to move the support stay 9 up and down to an optimum position, and when the optimum position is determined, the nut 10 may be tightened again to fix the support stay 9.

As described above, in this embodiment, by providing the headrest displacement mechanism, the height position of the headrest 3 can always be automatically adjusted to an optimum position in accordance with the height of the occupant. Further, since the height position of the headrest 3 can be finely adjusted by providing the fine adjustment mechanism, after the height position of the headrest 3 is adjusted together with the seat cushion 1, the headrest 3 is moved to an even more optimum position. Can be adjusted.

The present invention is not limited to the above-described embodiment, but can be modified as follows, for example, and these embodiments also belong to the technical scope of the present invention. (1) In the above embodiment, the height position of the headrest 3 can be finely adjusted by loosening the nut 10. However, the support stay and the long cylindrical body are integrally formed to form the headrest. A configuration in which the height position cannot be finely adjusted may be employed.

(2) In the above-described embodiment, the headrest displacement mechanism pulls the support stay 9 by the wire 14 in conjunction with the sliding operation of the seat cushion 1. However, the support stay is vertically moved by the rod-shaped transmission member. In other words, any configuration may be used as long as the headrest is vertically displaced in conjunction with the sliding operation of the seat cushion. In addition, the present invention can be implemented with various modifications without departing from the scope.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a headrest displacement mechanism (a state in which a headrest is displaced upward).

FIG. 2 is an enlarged perspective view showing a headrest displacement mechanism (a state in which the headrest is displaced downward).

FIG. 3 is an exploded perspective view showing a headrest displacement mechanism.

FIG. 4 is a perspective view showing the entire seat back.

FIG. 5 is a side view of the vehicle seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat cushion 2 ... Seat back 3 ... Headrest 5 ... Seat back frame 7 ... Bracket 8 ... Long cylindrical body (cylindrical body) 9 ... Support stay 11 ... Coil spring (biasing member) 14 ... Wire

Claims (3)

[Claims] 1. A vehicle seat having a seat cushion configured to be slidable in the front-rear direction and having a headrest on an upper part of a seat back, wherein the headrest is moved up and down in conjunction with a sliding operation of the seat cushion in a front-rear direction. The headrest is displaced downward with respect to the forward sliding operation of the seat cushion, and the headrest is displaced upward with respect to the backward sliding operation of the seat cushion. A vehicle seat characterized by the above-mentioned. 2. The vehicle seat according to claim 1, wherein
The headrest displacement mechanism includes a bracket fixed to a seatback frame, a support stay that supports the headrest, and is provided on the bracket so as to be slidable in an up-down direction, and one end is connected to the support stay. A wire that pulls down the support stay in accordance with the forward sliding operation of the seat cushion, and a biasing member that biases the support stay in an upward direction. And a vehicle seat. 3. The vehicle seat according to claim 2, wherein
A vehicle wherein the lower end of the support stay is slidably fitted in a cylindrical body, and one end of the wire is connected to the cylindrical body so that the height position of the headrest can be finely adjusted. Sheet.