JPH06327539A - Seat device of vehicle - Google Patents

Abstract

PURPOSE:To properly support the upper body of a seated crew by means of a seat back even if the seat back is placed in any position out of a plurality of places at different tilt angles. CONSTITUTION:This device is equipped with an upper seat back shape changing means 20A, which is accommodated in the seat back 2, and causes deformation by the partial advance/retreat of at least the upper front, of the seat back 2, and an action control means 50, which controls the action of the upper seat back shape changing means 20A, according to the operation of a reclining mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device which is installed on a floor portion of a vehicle compartment forming portion of a vehicle and is used for an occupant of the vehicle.

[0002]

2. Description of the Related Art In the case of a seat device mounted on a vehicle and used for passengers, particularly when it is a driver's seat, an occupant seated on it can take a posture in which it is easy to drive the vehicle. In addition to being able to do so, it is required that the whole body be supported in a stable manner, and that the degree of fatigue is small even when sitting for a long time. . Even when the seat is a seat other than the driver's seat, the occupant seated on the seat can support the whole body stably and feel less fatigue even after sitting for a long time. It is hoped that you will be left in a state where

Therefore, a seat device of a vehicle is provided with a reclining mechanism, and the reclining mechanism adjusts the inclination angle of the seat back portion with respect to the seat cushion portion, so that the occupant sitting can adapt to the body. The one that can take a sitting posture or the like is put to practical use. In addition, for example, actual development Sho 63-199
As disclosed in Japanese Patent No. 654, a plurality of eccentric rollers extending in the vehicle width direction are arranged vertically in the seat back portion in order to reduce the degree of fatigue of a seated occupant. There has also been proposed a vehicle seat device in which the degree of protrusion of the front portion of the seat back portion that abuts the upper body of the occupant can be changed by rotating the eccentric rollers.

Among seat devices provided with a reclining mechanism among seat devices designed to reduce the fatigue felt by a seated occupant, for example, a seated occupant having a very average body size may be used. The position at which the seat back portion is supposed to be able to properly support the upper body of a person having the extremely average body size is set as a reference position, and the seat back portion at the reference position is rotated. An inclination angle of the seat back portion with respect to a vertical line passing through the moving axis (hereinafter, simply referred to as an inclination angle) is set as a reference inclination angle.

[0005]

However, in a vehicle seat device provided with a reclining mechanism, the inclination angle of the seat back portion varies depending on the body size of the occupant who is actually sitting or the desired posture. Is adjusted to the front side of the reference position, the so-called forward tilt position, or the rear side of the reference position, the so-called rearward tilt position, it is difficult to properly support the seated occupant. Becomes For example, when the seat back portion is placed in the forward leaning position or the backward leaning position, the pressing force is excessively exerted on the upper body upper portion of the seated occupant and is exerted on the lower body lower portion. This may cause a situation in which the occupant is insufficient or the pressing force is insufficient for the upper body upper portion of the seated occupant, and the pressing force is excessive for the lower body lower portion. Therefore, when the seat device of the vehicle is used as the driver's seat device, in particular, the seat back portion is placed in the forward leaning position or the backward leaning position, so that the seat back portion is pushed particularly against the upper part of the upper body of the seated driver. If the pressure is excessive or insufficient, the upper body of the driver will not be properly supported by the seat back portion, and the driver will feel much fatigue.

Further, as a vehicle seat device, there is known a seat device having a two-part type seat back part in which an upper part is rotatably attached to a lower part. Even in a seat device having a two-part type seat back portion, the upper body of the seated occupant is properly positioned regardless of the position where the seat back portion has a plurality of different inclination angles. Is difficult to support.

In view of the above point, according to the present invention, when the tilt angle of the seat back portion is adjusted by the reclining mechanism portion, the seat back portion is located at any one of the reference position, the forward leaning position and the backward leaning position. It is an object of the present invention to provide a vehicle seat device that can appropriately support the upper body of a seated occupant even when it is placed in the seat.

[0008]

In order to achieve the above object, a vehicle seat device according to the present invention includes a seat cushion portion disposed on a floor portion of a vehicle compartment forming portion of the vehicle, and a seat cushion portion. The seat back portion arranged on the rear portion side, the reclining mechanism portion that operates to adjust the tilt angle of the seat back portion, the seat back shape changing means housed in the seat back portion, and the seat back shape changing means. And the operation control means provided, the operation control means, according to the operation of the reclining mechanism unit,
The seat back shape changing means is configured to cause at least the upper front surface portion of the seat back portion to be deformed due to partial advance / retreat.

[0009]

In the vehicle seat device according to the present invention having the above-described structure, when the reclining mechanism section is operated and the seat back section is adjusted to change its position, the seat is correspondingly adjusted. At least the upper front portion of the back portion is partially moved back and forth to change the shape of the seat back portion, so that the seat back portion appropriately supports the upper body of the occupant seated. As a result, even when any of the plurality of positions of the seat back section having different inclination angles is maintained for a relatively long time, the seated occupant can properly support his / her upper body by the seat back section. Therefore, the degree of fatigue will be small.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of an example of a vehicle seat device according to the present invention. The example shown in FIG. 1 is, for example, for a driver, and is provided with a seat cushion portion 1 arranged on a floor portion in a vehicle compartment forming portion of a vehicle, and a headrest 3 provided above the seat cushion portion 1. The seat back portion 2 is provided on the rear portion side of the portion 1.
A pair of fixed brackets 5 (one of which is not shown in the figure) are attached to the left and right side portions of the seat cushion portion 1, and a reclining mechanism operating portion 6 is provided on one side portion of the seat cushion portion 1. It is provided. On the other hand, a pair of movable brackets 7 (one of which is not shown in the figure) are attached to the left and right side portions of the seat back portion 2. Each of the fixed brackets 5 attached to the seat cushion portion 1 and each of the movable brackets 7 attached to the seat back portion 2 are connected by a rotation shaft member 10 that rotatably supports the seat back portion 2. The fixed bracket 5, the movable bracket 7, the reclining mechanism actuating portion 6 and the rotary shaft member 10 form a part of the reclining mechanism. The seat back portion 2 is rotated around the rotation shaft member 10 as a fulcrum by operating the reclining mechanism operating portion 6 provided on the seat cushion portion 1.

Inside the seat back portion 2, there is provided a seat back body 15 to which a headrest holder member 11 is attached. The seat back body 15 is
A first flat plate-shaped portion 15A that extends along the front surface of the seat back portion 2 and a pair of second flat portions that bend in the vehicle rear side and extend in the vertical direction from the left and right ends of the first flat plate-shaped portion 15A, respectively. And a flat plate portion 15B (one of which is not shown in the figure) of
An upper opening 16 and a lower opening 17 formed by A and 15B are provided. Each of the second flat plate-shaped portions 15B of the seatback main body 15 is provided with a pipe-shaped frame member 18 having both ends connected to the upper end portion and the lower end portion thereof. In addition, the headrest holder member 11 includes the first flat plate-shaped portion 15A.
It extends in the vehicle width direction on the back side and is rotatably supported by a support member 12 attached to a pipe-shaped frame member 19 connecting a pair of second flat plate-shaped portions 15B.

The seat back body 15 is provided with an upper seat back shape changing means 20A and a lower seat back shape changing means 20B. The upper seatback shape changing means 20A includes a plurality of plate-shaped members A1 to A6 extending in the vehicle width direction, and a plurality of link mechanisms 22 (one pair provided to each of the plate-shaped members A1 to A6). One of the pair of link mechanisms 22 does not appear in the drawing). The plurality of plate-shaped members A <b> 1 to A <b> 6 are arranged in an array with a predetermined separation distance from the upper end of the upper opening 16 toward the lower end thereof, and the plurality of connecting members 2 are arranged.
3 is movably connected and covers the upper opening 16 provided in the seat back body 15 as a whole.
A support portion for the driver's upper body side portion that abuts on the front surface portion of the seat back portion 2 is formed. It is composed of a member A6. Then, both ends of each of the plate-shaped members A1 to A6 and the pair of second members
Is connected to the flat plate-shaped portion 15B via a plurality of link mechanisms 22.

The lower seat back shape changing means 20B is
A plurality of plate-shaped members B1 to B6, each extending along the vehicle width direction
And a plurality of link mechanisms 24 provided in pairs for each of the plate-shaped members B1 to B6.
One does not appear in the figure) and is included. The plurality of plate-shaped members B1 to B6 are arranged in an array with a predetermined separation distance from the upper end to the lower end of the lower opening 17, and are movably connected by a plurality of connecting members 23. The lower opening 17 provided in the seat back main body 15 is entirely covered to form a support portion for the driver's lower body lower portion that contacts the front surface portion of the seat back portion 2. The upper end of the part is a plate-shaped member B1
And the lower end of the supporting portion is a plate-like member B6.
It is composed by. And, these plate-like members B1 to
Each of B6 and each of the pair of second flat plate-shaped portions 15B is connected via a plurality of link mechanisms 24.

Each of the plurality of link mechanisms 22 in the upper seat back shape changing means 20A and the plurality of link mechanisms 24 in the lower seat back shape changing means 20B.
2 and 3 have substantially the same configuration as shown in FIGS. 2 and 3, and are supported by brackets 26 attached to the inner surface of each of the pair of second plate members 15B via bolts 25. And a pair of feed screw members 27 arranged to face each other along the up-down direction, a pair of movable engagement members 28 that engage with each of the feed screw members 27, and one end of the pair of movable engagement members 28. And a link portion 29 which is adapted to perform a pantograph-type expansion / contraction operation substantially along the vehicle front-rear direction by the movement of the movable engagement member 28 along the feed screw member 27. Is a motor 31 mounted on the bracket 26
The operation is controlled by the link drive unit 30 including the.

Of the plurality of link mechanisms 22, a pair of second
In each of those supported on one of the flat plate-shaped portions 15B via the bracket 26, the link portion 29 moves to one end of the corresponding one of the plate-shaped members A1 to A6 via the support member 21. In each of those that are movably attached and are supported by the other of the pair of second flat plate-shaped portions 15B via the bracket 26, the link portion 29 is
It is swingably attached to the other end of the corresponding one of the plate-shaped members A1 to A6 via a support member 21. On the other hand, in each of the plurality of link mechanisms 24 supported by one of the pair of second flat plate-shaped portions 15B via the bracket 26, the link portion 29 includes the plate-shaped member B1.
To B6, each of which is swingably attached to one end of a corresponding one of them through a support member 21 and which is supported on the other of the pair of second flat plate-like portions 15B through a bracket 26. In addition, the link portion 29 has the support member 2 at the other end of the corresponding one of the plate-shaped members B1 to B6.
It is movably attached via 1.

On the other hand, the link drive section 30 for controlling the operation of the link section 29 in each of the plurality of link mechanisms 22 and 24 has a driven bevel gear 32 attached to the opposing end section of each of the pair of feed screw members 27. , A drive bevel gear 33 that is attached to the output shaft of the motor 31 and engages with each of the driven bevel gears 32. The driving bevel gear 33 transmits the rotation of the motor 31 to the pair of feed screw members 27 via each of the driven bevel gears 32. As a result, the moving engagement member 28 that engages with the feed screw members 27 is moved to the motor 3
Depending on the direction of rotation of the No. 1, they are moved in a direction in which they approach each other or in a direction in which they separate from each other. When the moving engagement members 28 that engage with the pair of feed screw members 27 move in the directions in which they are separated from each other by the rotation of the motor 31, the link portion 29 is contracted. Further, when the moving engagement members 28 that engage with the pair of feed screw members 27 move in the directions in which they approach each other due to the rotation of the motor 31, the link portion 29 is extended. The link portion 29 is placed in the reference state as shown in FIG. 3 when each of the pair of movable engaging members 28 is positioned substantially at the center of the feed screw member 27 with which it is engaged.

Therefore, the upper seat back shape changing means 2
The plate-shaped members A1 to A6 of 0A are retracted when the link portions 29 of each of the plurality of link mechanisms 22 are contracted, so that the upper front surface portion of the seat back portion 2 is retracted, and the plurality of link mechanisms are also retracted. When the link part 29 in each of 22 is extended, it is advanced together with it,
The upper front surface portion of the seat back portion 2 is moved forward, whereby the upper portion of the seat back portion 2 is deformed. Similarly, the plate-like members B1 to AB of the lower seat back shape changing unit 20B also include a plurality of link mechanisms 24.
When the link portion 29 of each of the two is contracted, it is retracted accordingly, and the lower front surface portion of the seat back portion 2 is retracted, and when the link portion 29 of each of the plurality of link mechanisms 24 is extended, it is advanced. Accordingly, the lower front surface portion of the seat back portion 2 is advanced, and the lower portion of the seat back portion 2 is deformed.

Such upper seat back shape changing means 20
Among the link portions 29 provided in each of the plurality of link mechanisms 22 in A, the pair of link portions 29 connected to both ends of each of the plate-shaped members A3 to A6 have the same maximum extension amount. The pair of link portions 29 that are formed and are connected to both ends of the plate-shaped member A2 have a maximum extension amount of the pair of link portions 29 that are connected to both ends of each of the plate-shaped members A3 to A6. The pair of link portions 29 are formed so as to be larger than the maximum extension amount, and further, the pair of link portions 29 connected to both end portions of the plate-shaped member A1 have a pair of maximum extension amounts connected to both end portions of the plate-shaped member A2. It is formed so as to be larger than the maximum extension amount of the link portion 29. On the other hand, the link portions 29 provided in each of the plurality of link mechanisms 24 in the lower seat back shape changing means 20B are formed so that the maximum extension amounts are the same, and the maximum extension amount is the upper seat back. Plate-shaped members A1 to A in the shape changing means 20A
4 is smaller than the maximum extension amount of the pair of link portions 29 connected to both ends.

A plurality of link portions 29 formed in this way
In the upper seat back shape changing means 20A having the seat backs, the plate members A1 to A6 respectively correspond to the expansion amounts of the link portions 29 of the plurality of link mechanisms 22 when the link portions 29 are in the reference state. The portions of the upper front surface of the portion 2 are set so as to appropriately press the upper portion of the upper body of the driver who is seated on the seat cushion portion 1 as a whole. Similarly, even in the lower seat back shape changing means 20B, the expansion amounts of the link portions 29 of the plurality of link mechanisms 24 when the link portions 29 are in the reference state correspond to the plate-shaped members B1 to B6, respectively. The positions of the lower front portion of the seat back portion 2 are set so as to appropriately press the lower body portion of the driver who is seated on the seat cushion portion 1 as a whole.

On the other hand, the headrest holder member 11
4, is connected to an actuator 37 via a shaft member 36 that penetrates one of a pair of elongated holes 35 provided in the middle portion of the left and right side portions of the support member 12, and the support member is It is attached to the lower portion of the left and right side portions of 12 via a pair of pin members 38.
The headrest holder member 11 is swung by the operation of the actuator 37 with the pin member 38 as a fulcrum within the range regulated by the elongated hole 35. Further, the headrest holder member 11 is provided with a plurality of through holes 42 into which a pair of support shafts 41 (one of which is not shown in the figure) extending from the headrest frame member 40 shown in FIG. 5 are inserted. The headrest frame member 40 is supported by the headrest holder member 11 via a pair of support shafts 41, and when the headrest holder member 11 is swung, the headrest frame member 40 swings accordingly, and the angle of the headrest 3 with respect to the seat back portion 2 is increased. Change.

In the seat back portion 2, as shown in FIG. 5, a movable reference line Q, which is a representative line of the seat back portion 2 passing through the shaft center of the rotating shaft member 10, has a shaft of the rotating shaft member 10. An angle θ with respect to a fixed reference line X which is a vertical line passing through the center,
For example, a position that is inclined by about 21.5 degrees is set as a reference position. The tilt angle of the movable reference line Q with respect to the fixed reference line X is the tilt angle of the seat back portion 2, and the angle θ
Is a reference tilt angle for the seat back portion 2. When the seat back portion 2 is at the reference position as shown in FIG. 5, the upper seat back shape changing means 2
0A and the plurality of link portions 29 in each of the lower seat back shape changing means 20B are placed in the reference state. In this way, under the condition that the plurality of link portions 29 in each of the upper seat back shape changing means 20A and the lower seat back shape changing means 20B are in the reference state, the seat back portion 2 is seated on the seat cushion portion 1 while driving. It has a shape that appropriately supports the entire upper body of the person. Also,
With the plurality of link portions 29 in each of the upper seat back shape changing means 20A and the lower seat back shape changing means 20B being in the reference state, the headrest 3 is moved by the headrest frame member 40 as shown in FIG. , Is placed at a reference position that appropriately supports the head of the driver sitting on the seat cushion portion 1.

An angle sensor 50 (FIG. 1) is attached to the rotary shaft member 10 constituting the reclining mechanism. In the angle sensor 50, the seat back portion 2 which is rotated by operating the reclining mechanism operating portion 6 is
When the driver seated on the seat cushion portion 1 is swung within a range in which the driver can actually take a posture in which the seat cushion portion 1 can be driven, the seat back portion 2 is located in front of the reference position. The tilted position, the rear tilted position that is behind the reference position, the front tilted position to the reference position, and the rear tilted position to the reference position are rotated with the rotation of the seat back portion 2. This is detected by detecting the angular position of the movable bracket 7 with respect to the fixed bracket 5, and as shown in FIG. 6, the detection output signal SL1, SL2, SL3 or SL4 corresponding to the detection result is sent to the control signal forming section 51. To do. The angular position of the movable bracket 7 with respect to the fixed bracket 5 detected by the angle sensor 50 is set to a position which is about 90 degrees larger than the angular position of the movable reference line Q with respect to the fixed reference line X, and is sent from the angle sensor 50. Detected output signal SL
1, SL2, SL3, and SL4 represent changes in the tilt angle of the seat back portion 2.

The control signal forming section 51 is provided in the seat back section 2
Angle θ1 is smaller than the reference tilt angle θ
When a detection output signal SL1 indicating that the tilt angle of the seat back portion 2 is changed from the reference tilt angle θ to a larger tilt angle θ2 is detected, the control signal SM1 is formed. The control signal SM2 is formed when the signal SL2 is supplied, and the control signal SM3 is formed when the detection output signal SL3 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ is supplied. Further, the detection output signal S indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ.
When supplied with L3, it forms the control signal SM4. Then, those control signals SM1, SM2, SM3 or S
M4 is supplied to the plurality of motor drive units 52A, the plurality of motor drive units 52B, and the actuator drive unit 53.

The plurality of motor drive parts 52A are composed of a plate-shaped member A.
1, a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for 1 and two for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A2. A set of two motors 31 for controlling the operation of each of the pair of motors 31 and the pair of link mechanisms 22 provided for the plate-shaped member A3, and the pair of link mechanisms 22 provided for the plate-shaped member A4. Two motors 3 that control the operation of each
One set, a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A5,
And a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A6.
It is provided corresponding to each. Further, it includes a plurality of motor drive units 52A, a link drive unit 30 formed by respectively having two motors 31 corresponding to each of the motor drive units 52A, an angle sensor 50, and a control signal formation unit 51. Thus, an operation control unit for the upper seatback shape changing unit 20A is configured.

The plurality of motor drive portions 52B are plate-shaped members B.
1. A set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for 1 and a pair of two motors for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B2. A set of two motors 31 that controls the operation of each of the pair of motors 31 and the pair of link mechanisms 24 provided for the plate member B3, and a pair of link mechanisms 24 provided for the plate member B4. Two motors 3 that control the operation of each
One set, a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B5,
And a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B6.
It is provided corresponding to each. Further, it includes a plurality of motor drive units 52B, a link drive unit 30 formed by respectively having two motors 31 corresponding to each of the motor drive units 52B, an angle sensor 50, and a control signal formation unit 51. Thus, an operation control unit for the lower seat back shape changing unit 20B is configured.

A plurality of motor drive parts 52A constituting an operation control part for the upper seat back shape changing means 20A.
Is a control based on the detection output signal SL1 indicating that the tilt angle of the seat back portion 2 has changed from the reference tilt angle θ to the tilt angle θ1, that is, that the seat back portion 2 has been moved from the reference position to the forward tilt position. When the signal SM1 is supplied, the drive signals AA1, AA2, ..., AA5 and AA6 are respectively sent out, and the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2, that is, the seat. When the control signal SM2 based on the detection output signal SL2 indicating that the back portion 2 is located at the backward tilt position from the reference position is supplied,
The drive signals AB1, AB2, ..., AB5, and AB6 are respectively sent out, and the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ, that is, the seat back portion 2
When the control signal SM3 based on the detection output signal SL3 indicating that the vehicle has been moved from the forward tilt position to the reference position is supplied, the drive signals AC1, AC2, ..., AC5 and AC
6 respectively, and further, detection that indicates that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, that is, that the seat back portion 2 has been moved from the rearward leaning position to the reference position. Control signal SM4 based on output signal SL4
Is supplied, drive signals AD1, AD2, ..., A
D5 and AD6 are transmitted respectively.

Drive signals AA1, AA2, ..., AA5 and A sent from the plurality of motor drive units 52A.
A6, drive signals AB1, AB2, ..., AB5 and A
B6, drive signals AC1, AC2, ..., AC5 and A
C6 or drive signals AD1, AD2, ..., A
D5 and AD6 are a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A1, and the pair of link mechanisms 22 provided for the plate-shaped member A2. A set of two motors 31 for controlling the operation of each, a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A3, and a set of the plate-shaped member A4. A set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 thus formed, the plate-shaped member A5
And a pair of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the pair, and two for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A6. The motors 31 are supplied to the respective sets.

A plurality of motor drive parts 52B constituting an operation control part for the lower seat back shape changing means 20B.
When the control signal SM1 based on the detection output signal SL1 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ1 is supplied, the drive signal BA1,
BA2, ..., BA5, and BA6 are respectively sent out, and the control signal SM2 based on the detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2 is supplied. , Drive signals BB1, BB2
..., BB5 and BB6 are respectively sent out, and the control signal SM based on the detection output signal SL3 indicating that the tilt angle of the seat back portion 2 has changed from the tilt angle θ1 to the reference tilt angle θ.
3 is supplied, drive signals BC1, BC2, ...
BC5 and BC6 are respectively sent out, and further, the control signal SM based on the detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ.
4 is supplied, drive signals BD1, BD2, ...
BD5 and BD6 are transmitted respectively.

Drive signals BA1, BA2, ..., BA5 and B sent from the plurality of motor drive units 52B.
A6, drive signals BB1, BB2, ..., BB5 and B
B6, drive signals BC1, BC2, ..., BC5 and B
C6 or drive signals BD1, BD2, ..., B
D5 and BD6 are a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate member B1, and the pair of link mechanisms 24 provided for the plate member B2. A set of two motors 31 for controlling the operation of each, a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B3, and a set of the plate-shaped member B4. A set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 thus formed, the plate member B5
A pair of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B6, and two for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B6. The motors 31 are supplied to the respective sets.

On the other hand, the actuator drive section 53 is provided corresponding to the actuator 37 provided for the headrest holder member 11. When the actuator drive section 53 is supplied with the control signal SM1 based on the detection output signal SL1 indicating that the tilt angle of the seat back section 2 has changed from the reference tilt angle θ to the tilt angle θ1, the actuator drive section 53 sends out the drive signal SAA. However, when the control signal SM2 based on the detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2 is supplied, the drive signal SAB is transmitted and the seat back portion 2 is transmitted. When the control signal SM3 based on the detection output signal SL3 indicating that the inclination angle of the vehicle has changed from the inclination angle θ1 to the reference inclination angle θ, the drive signal SAC is transmitted, and the inclination angle of the seat back portion 2 is changed. When the control signal SM4 based on the detection output signal SL4 indicating that the inclination angle θ2 has changed to the reference inclination angle θ is supplied, the drive signal SAD is transmitted.
Drive signal SA sent from actuator drive unit 53
The A, SAB, SAC or SAD is supplied to the actuator 37.

The tilt angle of the seat back portion 2 is the reference tilt angle θ.
Detection output signal S indicating that the inclination angle is θ1 from
Based on L1, the drive signals AA1, AA2, ..., AA5 and AA6 respectively sent from the plurality of motor drive units 52A are continuously driven from the drive signal AA1 to the drive signal AA.
It is gradually shortened in the order of 6. As a result, a plurality of sets of two motors 31, to which the drive signals AA1, AA2, ..., AA5 and AA6 are respectively supplied, are normally rotated, for example, with different durations. In this way, when the plurality of motors 31 that constitute the operation control unit for the upper seatback shape changing unit 20A in a normal rotation are placed in the normal operating state, a pair of moving engagements corresponding to the respective motors 31 are performed. The members 28 are moved in the directions in which they are separated from each other, and the link portion 29 in the reference state contracts with a movement amount according to the period in which the motor 31 normally rotates.

Further, based on the detection output signal SL1 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ1, the drive signals BA1 respectively sent from the plurality of motor drive portions 52B. BA2, ..., BA
The durations of 5 and BA6 are gradually lengthened in the order of the drive signal BA1 to the drive signal BA6. As a result, a plurality of groups of two motors 31, to which the drive signals BA1, BA2, ..., BA5 and BA6 are respectively supplied, are normally rotated, for example, with mutually different durations. In this way, the plurality of motors 3 that constitute the operation control unit for the lower seat back shape changing unit 20B in a set
When the motor 1 is rotated in the forward direction, those motors 31
The pair of moving engagement members 28 corresponding to the respective ones are moved in the directions in which they are separated from each other, and the link portion 2 in the reference state.
9 reduces with a movement amount according to the period when the motor 31 rotates in the normal direction.

As a result, when the seat back portion 2 is placed in the forward tilted position from the reference position, the plate-shaped members A1 to A6 are moved in the order of the plate-shaped member A1 to the plate-shaped member A6. In FIG. 7, the plate-shaped members B1 to B6 are moved backward from the position indicated by the alternate long and short dash line to the position indicated by the solid line, and the plate-shaped members B1 to B6 are moved in order from the plate-shaped member B1 to the plate-shaped member B6. In, the position indicated by the alternate long and short dash line is retracted to the position indicated by the solid line. And these plate-shaped members A
1 to A6 and the plate-shaped members B1 to B6 are retracted, the seat back portion 2 is provided with the plate-shaped member A1 in the upper front portion thereof.
To A6, and a plurality of parts corresponding to the plate-shaped members B1 to B6 on the lower front surface part thereof are indicated by solid lines in FIG. 7 from positions as indicated by the one-dot chain line in FIG. It produces a deformation that recedes to the position as shown. In such a case, the reduction amount of the link portion 29 in each of the plurality of link mechanisms 22 and 24 that determines the shape of the seat back portion 2 is such that the seat back portion 2 placed in the forward tilted position has the seat cushion portion 1 The upper part of the upper body and the lower part of the upper body of the driver seated on the seat are properly pressed to properly support the entire upper body of the driver. As a result, even when the seat back portion 2 is placed in the forward leaning position for a relatively long period of time, the driver sitting on the seat cushion portion 1 is favorably supported by the seat back portion 2 as a whole. Therefore, the degree of fatigue will be small.

On the other hand, when the drive signal SAA is supplied to the actuator 37 based on the detection output signal SL1 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ1, the actuator 37 is activated. For example, the headlet holder member 11 is caused to rotate forward for a predetermined period of time, and the headlet holder member 11 is swung rearward. Along with that, the headrest frame member 40 swings rearward from the position shown by the alternate long and short dash line in FIG. 7, and assumes the position shown by the solid line in FIG. By swinging the headrest frame member 40, the angle of the headrest 3 with respect to the seatback portion 2 is changed, and the headrest 3 is deformed by the seatback portion 2 being partially retracted from the upper front surface portion and the lower front surface portion. During the period in which it occurs, it is displaced from the position shown by the alternate long and short dash line in FIG. 7 to the position shown by the solid line in FIG. 7, and the upper front face part and the lower front face part are deformed by partial retreat at the forward leaning position. Seat back part 2
Thus, the upper part of the body is properly supported by the driver's head. This effectively reduces the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed in the forward leaning position.

The tilt angle of the seat back portion 2 is the reference tilt angle θ.
Detection output signal S indicating that the inclination angle is θ2 from
Based on L2, the drive signals AB1, AB2, ..., AB5, and AB6, which are respectively sent from the plurality of motor drive units 52A, are maintained for the duration of the drive signals AB1 to AB6.
It is gradually shortened in the order of 6. As a result, a plurality of sets of two motors 31, to which drive signals AB1, AB2, ..., AB5 and AB6 are respectively supplied, are reversed, for example with opposite durations. When the plurality of motors 31 forming the operation control unit for the upper seatback shape changing means 20A in this way are rotated in the reverse direction, a pair of movable engagement members corresponding to each of the motors 31 is placed. 28 are moved in the directions in which they approach each other, and the link portion 29 in the reference state extends with a movement amount according to the period in which the motor 31 reversely rotates.

Further, based on the detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2, the drive signals BB1, respectively sent from the plurality of motor drive portions 52B. BB2, ..., BB
The durations of 5 and BB6 are gradually lengthened in the order of the drive signal BB1 to the drive signal BB6. As a result, a plurality of sets of two motors 31, to which the drive signals BB1, BB2, ..., BB5 and BB6 are respectively supplied, are reversed, for example with opposite durations. In this way, the plurality of motors 3 that constitute the operation control unit for the lower seat back shape changing unit 20B in a set
When the motor 1 is placed in the reverse operating state, those motors 31
The pair of movable engaging members 28 corresponding to the respective two are moved in the directions in which they come close to each other, and the link portion 2 in the reference state.
9 extends with a movement amount according to the period in which the motor 31 reversely rotates.

As a result, when the seat back portion 2 is placed at the rearward tilted position from the reference position, the plate-shaped members A1 to A6 are moved in the order of the plate-shaped member A1 to the plate-shaped member A6, which are reduced in order. In FIG. 8, the plate-shaped members B1 to B6 are moved forward from the position indicated by the alternate long and short dash line to the position indicated by the solid line, and the plate-shaped members B1 to B6 are moved in the order of increasing from the plate-shaped member B1 to the plate-shaped member B6. In, the position indicated by the dashed line is advanced to the position indicated by the solid line. And these plate-shaped members A
1 to A6 and the plate-shaped members B1 to B6 move forward, the seat back portion 2 has a plate-shaped member A1 at the upper front surface thereof.
To A6, and a plurality of parts corresponding to the plate-shaped members B1 to B6 on the lower front surface thereof are indicated by solid lines in FIG. 8 from positions as indicated by the one-dot chain line in FIG. It produces a deformation that advances to the position as shown. The extension amount of the link portion 29 in each of the plurality of link mechanisms 22 and 24 that determines the shape of the seat back portion 2 in such a case is such that the seat back portion 2 placed in the rearward tilted position has the seat cushion portion 1 The upper part of the upper body and the lower part of the upper body of the driver seated on the seat are properly pressed to properly support the entire upper body of the driver. As a result, even when the seat back portion 2 is placed in the rearward tilted position for a relatively long period of time, the driver sitting on the seat cushion portion 1 is favorably supported by the seat back portion 2 as a whole. Therefore, the degree of fatigue will be small.

On the other hand, when the drive signal SAB is supplied to the actuator 37 based on the detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2, the actuator 37 is activated. The headlettos holder member 11 is swung forward for a predetermined period, for example, by being reversed. Along with that, the headrest frame member 40 swings forward from the position shown by the alternate long and short dash line in FIG. 8 to take the position shown by the solid line in FIG. By swinging the headrest frame member 40, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 is deformed due to the partial forward movement of the upper front portion and the lower front portion of the seat back portion 2. During the period in which it occurs, it is displaced from the position shown by the alternate long and short dash line in FIG. 8 to the position shown by the solid line in FIG. 8, and the upper front surface part and the lower entire surface part are deformed by partial advance at the rearward tilt position. Seat back part 2
Thus, the upper part of the body is properly supported by the driver's head. This effectively reduces the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the rearward tilt position.

A detection output signal S indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ.
Based on L3, the duration of the drive signals AC1, AC2, ..., AC5, and AC6 respectively sent from the plurality of motor drive units 52A is from the drive signal AC1 to the drive signal AC.
The driving signal AC is gradually shortened in the order of 6.
1, AC2, ..., AC5 and AC6 are respectively supplied, and the plurality of groups of two motors 31 are reversed with different durations. As a result, the link unit 29 whose operation is controlled by the motor 31 forming the group
Are expanded with a movement amount corresponding to the reverse rotation period of the corresponding motor 31.

Further, based on the detection output signal SL3 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ, the drive signals BC1, BC2, respectively sent from the motor drive portion 52B. ..., the duration of BC5 and BC6 is from drive signal BC1 to drive signal BC
It is gradually lengthened in the order of 6, and the driving signal BC
, BC2, ..., BC5 and BC6 are respectively fed, the sets of two motors 31 being reversed with different durations. As a result, the link unit 29 whose operation is controlled by the motor 31 forming the group
Are expanded with a movement amount corresponding to the reverse rotation period of the corresponding motor 31.

As a result, when the seat back portion 2 is placed from the forward leaning position to the reference position, in the same manner as when the seat back portion 2 is placed from the reference position to the rearward leaning position,
The plate-shaped members A1 to A6 are moved forward, and the plate-shaped members B1 to B6 are moved forward, so that the seat back portion 2 is connected to the plate-shaped member A1 at the upper front portion thereof.
To A6, and a plurality of parts corresponding to the plate-shaped members B1 to B6 on the lower front surface thereof undergo forward deformation. In such a case, the amount of extension of the link portion 29 in each of the plurality of link mechanisms 22 and 24 that determines the shape of the seat back portion 2 is
It is supposed that they will be returned to the standard state. As a result, the seat back portion 2 placed at the reference position from the forward leaning position has an upper body upper portion and a lower body lower portion of the driver seated on the seat cushion portion 1 as shown in FIG. It has a shape that satisfactorily supports the entire upper body of the driver by pressing. As a result, even when the seat back portion 2 is kept at the reference position for a relatively long period of time, the driver sitting on the seat cushion portion 1 is favorably supported by the seat back portion 2 as a whole. Therefore, the degree of fatigue will be small.

On the other hand, when the drive signal SAC is supplied to the actuator 37 based on the detection output signal SL3 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ, the actuator 37 is driven. The headlet holder member 11 is reversed for a predetermined period of time.
Rock forward. Due to the swing of the headrest frame member 40 accompanying the swing of the headrest holder member 11, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 has the upper front surface portion and the lower front surface portion at the reference position. The seat back portion 2 that has been deformed due to the partial forward movement returns to the reference position that properly supports the driver's head whose upper body is supported. This effectively reduces the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the reference position.

Further, based on the detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, the drive signals AD1, respectively sent from the plurality of motor drive portions 52A. AD2, ..., A
The durations of D5 and AD6 are gradually shortened in the order of the drive signal AD1 to the drive signal AD6, and the two motors 31 to which the drive signals AD1, AD2, ..., AD5 and AD6 are supplied respectively. The multiple sets of elements are rotated forward with different durations. Thereby,
The link unit 29, whose operation is controlled by the motors 31 forming the set, is reduced with a movement amount according to the period in which the corresponding motor 31 rotates in the normal direction.

Further, based on the detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, the drive signals BD1, respectively sent from the plurality of motor drive portions 52B. BD2, ..., BD
The durations of 5 and BD6 are gradually lengthened in the order of the drive signal BD1 to the drive signal BD6, and the two motors 31 to which the drive signals BD1, BD2, ..., BD5 and BD6 are supplied respectively. The multiple sets of elements are rotated forward with different durations. As a result, the link portion 29, whose operation is controlled by the motors 31 forming the set, is reduced with a movement amount corresponding to the forward rotation period of the corresponding motor 31.

As a result, when the seat back portion 2 is placed from the rearwardly tilted position to the reference position, in the same manner as when the seat back portion 2 is placed from the reference position to the frontally tilted position,
The plate-shaped members A1 to A6 are retracted, and the plate-shaped members B1 to B6 are retracted, so that the seat back portion 2 has the plate-shaped member A1 at the upper front portion thereof.
To A6, and a plurality of parts corresponding to the plate-shaped members B1 to B6 on the lower front surface thereof are deformed to retreat. In this case, the reduction amount of the link portion 29 in each of the plurality of link mechanisms 22 and 24 that determines the shape of the seat back portion 2 is
It is supposed that they will be returned to the standard state. As a result, the seat back portion 2 placed at the reference position from the rearward leaning position has a shape as shown in FIG. 5 and an effect accompanying it.

On the other hand, when the drive signal SAD is supplied to the actuator 37 based on the detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, the actuator 37 is activated. The headlet holder member 11 is rotated normally for a predetermined period of time.
Rock back. Due to the swing of the headrest frame member 40 accompanying the swing of the headrest holder member 11, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 has the upper front surface portion and the lower front surface portion at the reference position. The seat back portion 2 that has been deformed due to partial retreat allows the upper body to be returned to the reference position that properly supports the driver's head. This effectively reduces the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the reference position.

In the above example, when the inclination angle of the seat back portion 2 changes from the reference inclination angle θ to the inclination angle θ1, from the reference inclination angle θ to the inclination angle θ2, and from the inclination angle θ1. When the reference tilt angle becomes θ, and tilt angle θ
It is assumed that the upper seat back shape changing means 20A and the lower seat back shape changing means 20B deform the seat back portion 2 at each of the reference inclination angles θ from 2 in the present invention. In such a vehicle seat device, when the seat back portion is moved within a rotation range in which the seated driver can take a posture in which the driver can actually drive, when the seat back portion moves, The upper seat back shape changing means and the lower seat back shape changing means may continuously deform the seat back portion.

Further, in the above example, the upper seat back changing means 20A and the lower seat back changing means 2 are arranged.
0B is provided, but in the vehicle seat device according to the present invention, only the upper seatback changing means 20A may be provided, and the lower seatback shape changing means may not be provided.

[0049]

As is apparent from the above description, according to the vehicle seat device of the present invention, when the reclining mechanism is operated and the tilt angle of the seat back portion is adjusted to be changed, the adjustment is performed. Accordingly, at least the upper front surface portion of the seat back portion is partially advanced and retracted,
Since the seat back portion is deformed so as to be able to properly support the upper body of the seated occupant, the seat back portion can be positioned at any of a plurality of different tilt angles for a relatively long time. Even when the vehicle is struck, the upper body of the seated occupant is appropriately supported by the seat back portion, and fatigue is hardly felt.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a main part of an example of a vehicle seat device according to the present invention.

FIG. 2 is a cross-sectional view showing a part of a main part shown in FIG.

FIG. 3 is a side view showing a part of a main part shown in FIG.

FIG. 4 is a perspective view showing a headrest holder member arranged in the main part shown in FIG. 1.

FIG. 5 is a diagram provided for explaining an operation of a main part shown in FIG.

FIG. 6 is a block configuration diagram of an operation control unit for the main part shown in FIG.

FIG. 7 is a diagram provided for explaining an operation of a main part shown in FIG.

FIG. 8 is a diagram provided for explaining an operation of a main part shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat cushion part 2 Seat back part 3 Headrest 5 Fixed bracket 6 Reclining mechanism operation operation part 7 Movable bracket 10 Rotating shaft member 11 Headrest holder member 15 Seat back body 15A 1st flat plate part 15B 2nd flat plate part 20A Upper seat back shape changing means 20B Lower seat back shape changing means 22, 24 Link mechanism 28 Moving engagement member 29 Link part 30 Link drive part 31 Motor 37 Actuator 40 Headrest frame member 50 Angle sensor 51 Control signal forming part 52A, 52B Motor drive unit 53 Actuator drive unit

Claims (3)

[Claims] 1. A seat cushion portion arranged on a floor portion of a vehicle compartment forming portion of a vehicle, a seat back portion arranged on a rear portion side of the seat cushion portion, and the seat cushion portion of the seat back portion. A reclining mechanism section that operates to adjust a tilt angle with respect to the seat back section, a seat back shape changing section that is housed in the seat back section, and that causes deformation of at least an upper front surface section of the seat back section due to partial advance / retreat, and the reclining mechanism Operation control means for controlling the operation of the seat back shape changing means according to the operation of the section,
A vehicle seat device configured to include. 2. The seat back shape changing means is characterized in that, in addition to the upper front surface portion of the seat back portion, the lower front surface portion of the seat back portion is deformed by a partial forward / backward movement. Item 1. A vehicle seat device according to item 1. 3. A headrest is provided at an upper part of the seatback portion, and headrest driving means for changing an angle of the headrest with respect to the seatback portion in accordance with an operation of a reclining mechanism portion is provided. Item 1. A vehicle seat device according to item 1.