JPH10244860A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat by which a driver can comfortably drive a vehicle in a relaxed posture regardless of his physical constitution. SOLUTION: A vehicle seat has a seat cushion 11 supported by a vehicle body floor and an erect seat back 12 mounted on the seat cushion 11 such that it can be moved back and forth via a support mechanism and be fixed at a position where it is moved. The seating part of the seat cushion 11 is made short for a driver having a small physical constitution and long for a driver having a large physical constitution by moving back and forth the seat back 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat and, more particularly, to a vehicle seat provided with a seat cushion supported on a vehicle body floor and a seat back attached to the seat cushion and standing upright. .

[0002]

2. Description of the Related Art In general, a vehicle seat is designed on the basis of an occupant of a predetermined physique, and has a comfortable sitting comfort for an occupant of a supposed standard or a physique close to this. In addition, the vehicle can be driven in a comfortable posture. However, for an occupant whose physique deviates greatly from the assumed standard physique, the sitting comfort is not always comfortable, and the driving of the vehicle cannot always be performed in an easy posture.

In order to cope with such a problem, a general vehicle seat is mounted on a vehicle body floor via a seat slide mechanism so that the position of the seat can be adjusted in the front-rear direction. And means for adjusting the position of the seat forward or backward.

[0004]

By the way, in a vehicle seat whose front and rear positions can be adjusted, compared with a vehicle seat whose position cannot be adjusted, the occupant has a better sitting comfort.
In addition, although the vehicle can be driven in an easy posture, for a small occupant, the seat cushion seating portion is deep in the front and back, and the thigh portion is positioned by the front end of the seat cushion. It is lifted and compressed from below, and the back is separated from the seat back and is not sufficiently supported. In addition, for an occupant of a large physique, the seat cushion is in a shallow state in the front and back, and in a state in which the back is supported by the seat back, the knee is located in front of the seat cushion, and The portion rises from the front end of the sheet cushion and is not sufficiently supported.

Accordingly, it is an object of the present invention to provide a vehicle seat capable of properly supporting an occupant irrespective of its physique, to improve the occupant's sitting comfort and to operate the vehicle in a comfortable posture. To be able to do it.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a vehicle seat having a seat cushion supported on a vehicle body floor, and a seat back attached to the seat cushion and standing upright. The seat cushion is mounted to the seat cushion via a support mechanism so as to be movable in the front-rear direction and fixed at the moving position.

[0007] In the vehicle seat according to the present invention, the support mechanism is mounted on a cushion frame constituting the seat cushion so as to be movable in the front-rear direction, and the movable member supports the seatback. It is possible to adopt a configuration provided with an operation means for moving the movable member in the front-rear direction.

In the vehicle seat, the operating means may include a screw shaft rotatably mounted on the cushion frame so as to be restricted from moving in the front-rear direction, and a screw shaft mounted on the movable member. It is possible to have a configuration provided with a nut member screwed to the shaft, and an operation handle assembled to the tip end of the screw shaft to rotate the screw shaft by a rotation operation.

[0009]

In the vehicle seat constructed as described above, the seat back can be fixed at a desired position by adjusting the position of the seat back in the front-rear direction with respect to the seat cushion.

[0010] For this reason, for example, for an occupant with a small build, if the seat back is fixed at a position in front of the seat cushion and the seat cushion is changed to a shallow front and rear position, the seat cushion of the seat cushion can be changed. This is optimal for the seating of an occupant whose length is small, so that the back of the occupant is securely supported by the seat back. Therefore, the sitting comfort for a small occupant is improved, and the vehicle can be driven in a comfortable posture.

For a large occupant, for example, if the seat back is fixed at the rear position of the seat cushion, and the seat cushion is changed to a deeper state in the front and rear, the length of the seat cushion can be reduced. Is optimal for seating an occupant with a large physique, and the back of the occupant is securely supported by the seat back. Therefore, the sitting comfort for a large occupant is improved, and the vehicle can be driven in a comfortable posture.

In the vehicle seat, the support mechanism is mounted on a cushion frame constituting a seat cushion so as to be movable in the front-rear direction, and a movable member supporting the seat back is provided. The operating means may be provided with an operating means for moving, and the operating means is mounted on a screw shaft rotatably mounted on the cushion frame so that the movement in the front-rear direction is regulated, and on the movable member. It is possible to provide a configuration including a nut member screwed to the screw shaft, and an operation handle assembled to the distal end of the screw shaft to rotate the screw shaft by a rotation operation.

In the vehicle seat having such a configuration, the screw shaft is rotated by rotating the operation handle that constitutes the operation means, so that the nut member can be advanced and retracted on the screw shaft. By moving the integral movable member back and forth, the position of the seat back can be adjusted back and forth with respect to the seat cushion. Such a support mechanism has a simple configuration and good operability.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an example of a vehicle seat according to the present invention. The vehicle seat includes a seat cushion 11, a seat back 12, and a headrest 13, and the seat back 12 is rotatable in the front and rear directions on left and right sides of the seat cushion 11 via left and right reclining mechanisms 20. It is attached to.

The vehicle seat is disposed on the vehicle body floor via a pair of left and right seat tracks 30 constituting a seat slide mechanism. Each seat track 30 includes a lower rail 31 and an upper rail 32 that is movably attached to the lower rail 31 in the front-rear direction. Each upper rail 32 supports the seat cushion 11 on each of the left and right sides. The lower arm 31 is provided at a predetermined position on the vehicle body floor.

As a result, in the vehicle seat, the seat back 12 through the reclining mechanism 20 is provided.
The front and rear inclination angles can be adjusted, and the front and rear positions of the entire seat can be adjusted via the seat track 30 of the seat slide mechanism.

The seat back 12 constituting the vehicle seat is assembled via the support mechanism 10a shown in FIGS. 3 to 7, and is movable in the front-rear direction with respect to the seat cushion 11. ing.

The support mechanism 10a includes a fixed frame 14, a movable frame 15, and a pair of guide rails 16, and includes a screw shaft 17, a nut member 18, and an operation handle 19, which are operation means of the movable frame 15. ing.

The fixed frame 14 is used for the seat cushion 1.
1, the movable frame 15 is formed in a shape similar to a home base, and each of the guide rails 16 is formed of a rectangular square plate having an opening at the bottom. It is long and formed in a U-shaped cross section. Each guide rail 16 is fixed frame 1
4 are fixed inside the left and right side frame portions 14a, 14b. Each guide rail 16 extends rearward from the central portion of the side frame portions 14a, 14b, opens inward and faces each other. The movable frame 15 has side frame portions 15a,
At 15b, each guide rail 16 is fitted.

Each side frame portion 14a, 14 of the fixed frame 14
b, a pair of front and rear long holes 14c and 14d are formed, and each guide rail 16 is formed with a long hole 16a facing both the long holes 14c and 14d.

On the other hand, each side frame 15 of the movable frame 15
a and 15b have a pair of front and rear guide pins 15c and 15d.
Are formed. Each of the guide pins 15c and 15d has an outer diameter that can be inserted into each of the long holes 14c and 14d of the fixed frame 14 and the long hole 16a of the guide rail 16, and has an inner hole of each of the guide pins 15c and 15d. It is formed on the screw part.

The movable frame 15 is provided with respective side frame portions 15a, 1
5b, the guide pins 15c, 15d are fitted to the respective guide rails 16 and the guide rails 16 have the elongated holes 16a,
It is inserted into each of the long holes 14 c and 14 d of the fixed frame 14 so as to be movable with respect to the fixed frame 14 in the front-rear direction.

The screw shaft 17 constituting the operating means is rotatably supported in a state penetrating through the center of the front frame portion 14e of the fixed frame 14. On the other hand, the nut member 18 is fixed to the central portion of the front frame portion 15e of the movable frame 15,
It faces the through hole 15f provided in the front frame portion 15e. The screw shaft 17 is provided in the through hole 1 of the front frame portion 15 e of the movable frame 15.
5f, and the nut member 18 is screwed so as to be able to advance and retreat. The operation handle 19 is fixed to the distal end of the screw shaft 17 and is located in front of the front frame portion 14 e of the fixed frame 14.

As shown in FIG. 7, the reclining mechanism 20 includes an upper arm 21 and a lower arm 22 rotatably mounted on the upper arm 21. The upper arm 21 is fixed to a lower end portion of the seat back 12.
The lower arm 22 is assembled to the movable frame 15 by screwing the bolts 23a and 23b to the guide pins 15c and 15d of the movable frame 15.

Thus, the seat back 12 is assembled to the left and right side frame portions 15a and 15b of the movable frame 15 via the left and right reclining mechanisms 20. The cushion body 11a of the seat cushion 11 is
As shown in FIGS. 4 and 5, the springs are resiliently received by a number of S springs 11 b stretched on the fixed frame 14.

As shown in FIG. 2, the vehicle seat thus constructed is disposed on the vehicle body floor via left and right seat tracks 30, and the reclining mechanism 20 on the left and right causes the seat back 12 to move. The tilt angle in the front-rear direction can be adjusted, and the seat track 30 can be adjusted.
, The position of the entire seat in the front-rear direction can be adjusted.

When the operating handle 19 of the operating means constituting the support mechanism 10a is rotated in the vehicle seat, the screw shaft 17 is rotated to rotate the nut member 1.
8 can be moved back and forth on the screw shaft 17,
Thereby, the movable frame 15 and the seat back 12 attached to the movable frame 15 can be moved in the front-rear direction with respect to the seat cushion 11.

Therefore, for example, for a small occupant, the seat back 12 is fixed at a front position on the seat cushion 11 as shown by the solid line in FIG.
If the seating portion of the seat cushion 11 is changed to a shallow state back and forth, and for a large occupant, for example, as shown by a two-dot chain line in FIG. If the seat cushion 11 is fixed and the seating portion of the seat cushion 11 is changed back and forth to a deep state, the seating portion of the seat cushion 11 is in an optimal state for the occupant's physique, and the back of the occupant becomes the seat back 12.
It will be in the state supported reliably. Therefore, according to the vehicle seat, the sitting comfort for the occupant can be improved regardless of the size of the physique, and the vehicle can be driven in a comfortable posture.

In the vehicle seat, the support mechanism 10
(a) is mounted on a fixed frame 14 also serving as a cushion frame constituting the seat cushion 11 so as to be movable in the front-rear direction, and a movable frame 15 supporting the seat back 12 and an operation of moving the movable frame 15 in the front-rear direction. Means, and the operating means is screwed to the screw shaft 17 mounted on the fixed frame 14 so as to be rotatable while being restricted from moving in the front-rear direction and the screw shaft 17 mounted on the movable frame 15. A nut member 18 is provided, and an operation handle 19 is attached to the tip of the screw shaft 17 and rotates the screw shaft 17 by a rotation operation.

Therefore, in the vehicle seat,
By rotating the operation handle 19 constituting the operation means, the screw shaft 17 can be rotated to move the nut member 18 forward and backward on the screw shaft 17, whereby the movable frame 15 integrated with the nut member 18 can be moved. By moving the seat back 12 back and forth, the position of the seat back 12 can be adjusted back and forth with respect to the seat cushion 11. Further, the support mechanism 10a has a simple configuration and has good operability.

In the supporting mechanism 10a,
This is a manual type in which the seat back 12 is moved in the front-rear direction by manual operation. However, as shown by a two-dot chain line in FIG. 3, a driving means 19A for electrically driving the screw shaft 17 is provided. The support mechanism can be configured to be electrically driven.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle seat according to an example of the present invention.

FIG. 2 is a side view showing a state in which the vehicle seat is disposed in a vehicle cabin.

FIG. 3 is a plan view of a support mechanism constituting the vehicle seat.

FIG. 4 is a side view of the support mechanism.

FIG. 5 is a vertical sectional front view of the support mechanism taken along line 5-5 in FIG. 3;

FIG. 6 is a vertical sectional front view of the support mechanism taken along line 6-6 of FIG. 3;

FIG. 7 is a perspective view illustrating a state in which a reclining mechanism attached to a seat back is attached to a movable frame constituting the supporting mechanism.

[Explanation of symbols]

10a: support mechanism, 11: seat cushion, 11a ...
Cushion body, 11b S spring, 12 Seat back, 13 Headrest, 14 Fixed frame, 14
a, 14b ... side frame part, 14c, 14d ... long hole, 14e ...
Front frame portion, 15 movable frame, 15a, 15b side frame portion, 15c, 15d guide pin, 15e front frame portion, 1
6: guide rail, 16a: long hole, 17: screw shaft, 18
... Nut member, 19 ... Operation handle, 20 ... Reclining mechanism, 21 ... Upper arm, 22 ... Lower arm, 2
3a, 23b: bolt, 30: seat track, 31:
Lower rail, 32 ... Upper rail.

Claims (3)

[Claims] 1. A vehicle seat comprising: a seat cushion supported on a vehicle body floor; and a seat back attached to the seat cushion and standing upright. A vehicle seat, which is mounted so as to be movable in the front-rear direction and fixed at a moving position via a support mechanism. 2. The vehicle seat according to claim 1, wherein
The support mechanism includes a movable member that is mounted on the cushion frame that constitutes the seat cushion so as to be movable in the front-rear direction and supports the seat back, and operating means that moves the movable member in the front-rear direction. A vehicle seat characterized in that: 3. The vehicle seat according to claim 2, wherein
A screw shaft that is rotatably mounted on the cushion frame so as to be restricted from moving in the front-rear direction, a nut member that is mounted on the movable member and screwed to the screw shaft, A vehicle seat, comprising: an operation handle that is attached to a tip portion of the vehicle and that rotates the screw shaft by a rotation operation.