JP2000139612A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device for supporting a sitting person in a stable attitude regardless of body dimensions by adjusting the front end position of a seat cushion corresponding to a difference in body dimensions, in which the whole of the seat cushion is capable of moving in the longitudinal direction to eliminate limitations on material quality and shape of a cushion pad and a seat cover to be adopted in the case of constructing the seat cushion to be expanded and contracted. SOLUTION: A seat back S1 is assembled to the rear end part of a support frame 20 supported on the floor side, and a seat cushion S1 is assembled to the support frame 20 to be moved by a designated amount in the longitudinal direction. The seat cushion S1 is capable of moving in the longitudinal direction to the support frame 20 by the operation of a driving mechanism 50 provided between the seat cushion S1 and the support frame 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device,
In particular, the present invention relates to a seat device in which a seat cushion constituting a seat device advances and retreats with respect to a seat back so that a seated person can be seated in a stable posture regardless of the physique.

[0002]

2. Description of the Related Art Seat devices that allow a occupant to sit in a stable posture regardless of their physique are disclosed in, for example, JP-A-5-56824 and JP-A-6-284940. Devices are known. In these seat devices, the seat cushion is configured to be able to expand and contract in the front-rear direction, and a driving mechanism that allows the seat cushion to expand and contract in the front-rear direction is arranged in the seat cushion. The seat cushion is extended and contracted to adjust the distance between the inside of the seated person's knee and the front end of the seat cushion, thereby bringing the seated person into a stable support state.

[0003]

In such a seat apparatus of the type in which the seat cushion is expanded and contracted in the front-rear direction, it is essential that the cushion pad and the seat cover constituting the seat cushion expand and contract. Assembling of the cushion pad and the seat cover to the cushion frame must also allow for expansion and contraction. For this reason, in order to constitute this type of seat device, the cushion pad and the seat cover that constitute the seat cushion are greatly restricted in terms of both material and shape.

In this type of seat device, a central main portion, which is a seating portion of a seat cushion, is configured as a movable portion that expands and contracts in the front-rear direction. In addition, the positional relationship between the main portion and the side portions on both sides is displaced from the standard set position, giving the occupant an uncomfortable feeling.

Accordingly, it is an object of the present invention to address the above-described problems by configuring the entire seat cushion so as to be movable in the front-rear direction with respect to the seat back.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a seat device, which comprises a seat cushion and a seat back standing upright at a rear end of the seat cushion, wherein the seat back is a floor. The seat cushion is attached to the rear end of the support member supported on the side, and the seat cushion is attached to the support member so as to be movable by a predetermined amount in the front-rear direction, and a drive provided between the support member and the seat cushion. It is characterized by being configured to be movable in the front-rear direction by the action of a mechanism.

In the seat device according to the present invention, the support member includes a pair of left and right frames fixed to the floor, and a connecting pin provided on the seat cushion is movable at a rear end of the frame. It is provided with a guide groove extending in the front-rear direction to be inserted, and a rack extending in the front-rear direction engaging with a drive gear provided on the seat cushion side on the front end side of the frame to constitute the drive mechanism. Can be.

In the seat device according to the present invention, the drive mechanism is provided on a drive motor provided on the seat cushion side, a drive gear rotated by the drive motor, and a frame side constituting the support member. And a rack extending in the front-rear direction and meshing with the drive gear.

Further, in the seat device according to the present invention, the support member is fixed to an upper rail which constitutes a seat track disposed on a vehicle floor, and the seat back reclines to a rear side of the support member. It can be assembled via a mechanism to constitute a vehicle seat.

[0010]

According to the seat device of the present invention, the seat cushion moves in the front-rear direction while being supported by the support member by the operation of the driving mechanism, and moves in the front-rear direction with respect to the seat back. . For this reason, the length from the seat back to the tip of the seat cushion is adjusted,
The distance between the inner side of the seated person's knee and the front end of the seat cushion is adjusted, so that the seated person can be stably supported.

However, in the seat device according to the present invention, since the entire seat cushion moves in the front-rear direction with respect to the seat back, the cushion pad and the seat cover which constitute the seat cushion greatly expand and contract. It is not necessary to employ any material, and in configuring the seat device, the cushion pad and the seat cover are not greatly restricted in terms of material and shape. Also, when the seat cushion is moved, the central main portion, which is the seating portion, and the side portions on both sides move integrally, so that the positional relationship between the main portion and both side portions remains unchanged. Is not displaced from the standard setting position to give the occupant an uncomfortable feeling.

Further, in the seat device according to the present invention, the support member is fixed to the upper rail constituting the seat track disposed on the floor of the passenger compartment, and the seat back is provided on the rear side of the support member via a reclining mechanism. By mounting the vehicle seat, the reclining function and the front / rear position adjustment function of a normal vehicle seat can be easily provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 schematically shows a seat apparatus according to an example of the present invention. The seat device is a seat device for a vehicle, and includes a seat cushion S1 and a seat back S2 that constitute a seat body, and a cushion frame 10 that supports the seat cushion S1, as shown in FIGS. The support frame 20 that supports the frame 10 and the seat back S2, the seat track 30 that supports the support frame 20, and the elevating mechanism 40 that moves the seat cushion S1 up and down.
a, a moving mechanism 40 for moving the seat body in the front-back direction
b, reclining mechanism 40c, seat cushion S1
Is provided with a drive mechanism 50 for moving the motor in the front-rear direction.

The cushion frame 10 has a rectangular frame shape as shown in FIG. 2, and a seat cushion S1 is integrally attached to the cushion frame 10, and is supported by the support frame 20. A nut member 12 is fixed to the left and right sides on the rear end side of the frame-shaped main body 11 of the cushion frame 10, and all the constituent members other than the racks 51a and 51b constituting the drive mechanism 50 are provided on the front end side. It is assembled.

The support frame 20, as shown in FIG.
The main body is a pair of frame bodies 21 and 22 having a predetermined length and a plate shape.
2a is provided in an upright state, and front brackets 21b and 22b are provided in an upright state on the front end side.
Guide grooves 21c, 22c extending in the front-rear direction are formed in the rear brackets 21a, 22a, and guide grooves 21d, 22d extending in the front-rear direction are formed in the front brackets 21b, 22b. Are formed. A known reclining mechanism 40c is attached to the rear end of each of the frame bodies 21 and 22.
Are connected to each other by a connecting rod 41 that connects the left and right reclining mechanisms 40c to form the support frame 20.

The support frame 20 supports the cushion frame 10, and the cushion frame 10
Are rear brackets 21a, 22a of the support frame 20.
Nut member 1 through guide grooves 21c and 22c provided in
It is assembled via a stepped bolt 23 screwed to the second 2 and a drive mechanism 50, and is supported so as to be movable by a predetermined amount in the front-rear direction.

As shown in FIG. 4, the seat track 30 includes a pair of left and right track bodies 31, 32 connected to a connecting member 33.
In the seat track 30, an elevating mechanism 40a and a moving mechanism 40b are assembled. The lifting mechanism 40a and the moving mechanism 40b are known, and the truck bodies 31, 32 are also connected to each other by connecting rods 42, 43 before and after the lifting mechanism 40a. The seat track 30 supports the support frame 20, and the support frame 20 is a left, right, front and rear swing arm 4 that constitutes a lifting mechanism 40 a provided on the seat track 30.
4a and 44b, and are supported so as to be able to move up and down a predetermined amount in the vertical direction.

As shown in FIGS. 1, 5 and 6, the drive mechanism 50 includes racks 51a and 51b, a drive motor 52, a large-diameter gear 53a and a small-diameter gear 53b.
A step gear, a drive gear 54a, and a driven gear 54b are provided. The drive motor 52 is mounted on the left side of the front end of the frame body 11 in the cushion frame 10 via the mounting bracket 55, and the output gear 52 a provided on the output shaft of the drive motor 52 is connected to the inner hole 55 a of the mounting bracket 55. And a large-diameter gear 53a of a two-stage gear meshes with the output gear 52a. The small-diameter gear 53b of the two-stage gear meshes with a rack 51a provided on the front bracket 21b of the frame main body 21.

The driving gear 54a and the driven gear 54b are connected to each other by a connecting rod 56, and the driving gear 54a
Is a support pin 54c provided at the tip of the front bracket 2
1b is supported by being inserted into a guide groove 21d provided on the front bracket 22b, and the driven gear 54b is provided with a support pin 54e provided on the bracket 54d on the front bracket 22b.
d is inserted and connected and supported. In this state, the drive gear 54a meshes with the large-diameter gear 53a of the two-stage gear, and the driven gear 54b meshes with the rack 51b provided on the front bracket 22b.

In the seat device thus constructed, the seat cushion S1 is integrated with the cushion frame 10, is supported by the support frame 20 and the seat track 30, and the seat back S2 is supported by the support frame 20 and the seat track 30. Reclining mechanism 40c on frame 20
And is supported by the support frame 20 via the. For this reason, the seat body composed of the seat cushion S1 and the seat back S2 can be moved up and down together with the cushion frame 10 and the support frame 20 by the operation of the elevating mechanism 40a, so that the position in the vertical direction can be adjusted, and By the operation of the mechanism 40b, the cushion frame 10 and the support frame 20 can be moved in the front-rear direction and the position in the front-rear direction can be adjusted. Further, with respect to the seat back S2, the inclination angle in the front-rear direction with respect to the seat cushion S1 can be adjusted by the operation of the reclining mechanism 40c.

In the seat device, the seat cushion S1 can be moved in the front-back direction with respect to the seatback S2 by the action of the drive mechanism 50, and the position of the front end of the seat cushion S1 is shown in FIG. The position can be adjusted between the state of the one-dot chain line and the state of the two-dot chain line.

In the seat apparatus, when the drive motor 52 of the drive mechanism 50 is driven to rotate, the two-stage gear meshing with the output gear 52a rotates, and the large-diameter gear 53 of the two-stage gear is rotated.
While rotating the drive gear 54a meshing with a, the drive gear 54a rotates the driven gear 54b connected by the connecting rod 56. Therefore, the small-diameter gear 53b of the two-stage gear rotates to advance and retreat while meshing with the rack 51a, and the driven gear 54b advances and retreats while meshing with the rack 51b, thereby moving the cushion frame 10 into the respective guide grooves 21c on the support frame 20 side. , 22c, 21d, 22d.

As a result, the seat cushion S1 moves forward together with the cushion frame 10 when the drive motor 52 is driven, for example, in the forward rotation direction, and moves in the cushion frame 10 when driven in the reverse rotation direction. And the front end thereof is adjusted in the range shown by the one-dot chain line and the two-dot chain line in FIG.

As described above, according to the seat device, the seat cushion S1 moves in the front-rear direction while being supported by the support frame 20 by the action of the driving mechanism 50, and moves in the front-rear direction with respect to the seat back S2. Therefore, the length of the seat cushion S1 from the seat back S2 to the tip is adjusted so that the inside of the seated person's knee and the seat cushion S
The distance between the tip portions is adjusted, so that the seated person can be stably supported. In this case, it is not necessary to adjust the inclination angle of the seat back S2 when adjusting the seat cushion S1 in the front-rear direction.

In the seat device, the entire seat cushion S1 moves in the front-rear direction with respect to the seat back S2.
It is not necessary to employ a cushion pad and a seat cover that greatly expand and contract as the cushion pad and the seat cover. In configuring the seat device, the cushion pad and the seat cover are not greatly restricted in terms of material and shape. . Further, when the seat cushion S1 is moved, the central main portion, which is the seating portion, and the side portions on both sides move integrally, so that the positional relationship between the main portion and both side portions remains unchanged. The relationship does not displace from the standard setting position and give the occupant an uncomfortable feeling.

Further, in the seat apparatus, the seat frame 30 in which the support frame 20 is disposed on the passenger compartment floor is provided.
And the seat back S2 is assembled to the rear side of the support frame 20 via a reclining mechanism 40c to form a vehicle seat. The reclining function of a normal vehicle seat , And a front-back position adjustment function can be easily provided.

In the seat apparatus, if the left and right guide grooves 21c and 22c provided in the support frame 20 are formed to be inclined upward and rearward, the seat cushion S1 is lowered when moving forward, and is lowered when moving backward. Since the butt rises, the position of the seated person's eyes can be adjusted at the same time.

In the seat apparatus, the drive mechanism 50 is driven by the drive motor 52. However, the drive motor 52 is eliminated and the two-stage gear is manually driven to rotate. The lifting mechanism 40a and the moving mechanism 40b can also be changed to a known manual method instead of the power method driven by the drive motor.

[Brief description of the drawings]

FIG. 1 is a partially omitted side view schematically showing a seat device according to an example of the present invention.

FIG. 2 is a perspective view of a cushion frame constituting the seat device.

FIG. 3 is a perspective view of a support frame included in the seat device.

FIG. 4 is a perspective view of a seat track constituting the seat apparatus.

FIG. 5 is an exploded perspective view showing a driving mechanism of a seat cushion constituting the seat device.

FIG. 6 is a vertical sectional front view of the drive mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Cushion frame, 11 ... Frame-shaped main body, 12 ... Nut member, 20 ... Support frame, 21, 22 ... Frame main body, 21a, 22a ... Rear bracket, 21b, 22
b: Front bracket, 21c, 22c, 21d, 22d
... Guide groove, 23 ... Stepped bolt, 30 ... Seat track, 31, 32 ... Truck body, 33 ... Connecting member, 40
a lifting mechanism, 40b moving mechanism, 40c reclining mechanism, 41, 42, 43 connecting rod, 44a, 4
4b: swing arm, 50: drive mechanism, 51a, 51b ...
Rack, 52: drive motor, 52a: output gear, 53a
... Large diameter gear, 53b ... Small diameter gear, 54a ... Drive gear, 5
4b: driven gear, 54c, 54e: support pin, 54d:
Bracket, 55: mounting bracket, 55a: inner hole, 5
6 ... connecting rod, S1 ... seat cushion, S2 ... seat back.

Claims (4)

[Claims] 1. A seat cushion comprising: a seat cushion; and a seat back which is positioned upright on a rear end side of the seat cushion, wherein the seat back is assembled to a rear end of a support member supported on a floor side, and The seat cushion is attached to the support member so as to be movable in a front-rear direction by a predetermined amount,
A seat device which is configured to be movable in the front-rear direction by the action of a drive mechanism provided between the seat device and the support member. 2. The seat device according to claim 1, wherein the support member comprises a pair of left and right frames fixed to a floor, and a connecting pin provided on the seat cushion side is provided at a rear end of the frame. A front-rear guide groove that is movably inserted, and a front-end side of the frame is provided with a rack that extends in the front-rear direction and that meshes with a drive gear provided on the seat cushion side that constitutes the drive mechanism. A seat device characterized by the above-mentioned. 3. The seat device according to claim 1, wherein the drive mechanism includes a drive motor provided on the seat cushion side, a drive gear rotated by the drive motor, and a frame forming the support member. A seat device provided with a rack provided on the side and extending in the front-rear direction and meshing with the drive gear. 4. The seat device according to claim 1, wherein the support member is fixed to an upper rail which constitutes a seat truck disposed on a vehicle floor, and the seat back is connected to the support member. A seat device which is assembled via a reclining mechanism to a rear side of the vehicle to constitute a vehicle seat.