JPH11240364A - Sheet device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide flat surface by setting a sheet back to a folding position without deteriorating riding comfortableness on a rear sheet in the case that the upper surface height of a sheet cushion is set higher in a rear row sheet, and secure rear view while preventing the careless movement of a baggage mounted in a rear luggage compartment to the front row sheet side when the rear row sheet is doubly folded. SOLUTION: A first row sheet 11, a second row sheet 12 and a third row sheet are arranged sequentially from the front to the rear. The upper surface height of sheet cushions 11A-13A is set higher as they are positioned in the rear. Thickness of sheet backs 11B-13B is set thinner in the rear sheet. When the sheet backs 11B-13B are set to a folding position, a wide flat surface is formed that the back surfaces of the sheet backs 11B-13B are approximately flushed. The height of the doubly folded third row sheet 13 is set lower than the height of the doubly folded second row sheet 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 device.

[0002]

2. Description of the Related Art In a vehicle seat apparatus, a seat back is tilted forward so as to be able to take a lying position in which the seat back is overlapped in a substantially horizontal state on a corresponding seat cushion. There is one in which the back surface is a substantially horizontal storage surface (for example, Japanese Utility Model Laid-Open No. 3-47825). Although the seat back for the passenger seat can take such a laid-down position has already been put to practical use,
With this system, the occupant sitting in the rear seat can effectively use the back side of the passenger seat back in the lying position as a storage space and obtain a sense of release as much as the passenger seat back does not obstruct the view Can be.

On the other hand, in recent vehicles, three rows of seats are provided in the front-rear direction. However, since the floor panel is usually set so that the rear panel is higher than the front panel (especially In the case of a passenger car system or a one-box system vehicle body), a seat cushion of a seat located rearward is usually set at a higher position. In particular, it is preferable to make the rear seat cushion higher than the front seat cushion in order to sufficiently secure the front view of the occupant sitting on the rear seat.

[0004] In some vehicles, the seats behind the first row seats located in the front row can be double-faulted to increase the rear luggage space (for example, Japanese Unexamined Patent Publication (Kokai) No. Heisei 9 (1994) -208). 7-164940). In this double fault, the seat back is moved forward to a fall position in which the seat back is superimposed on the seat cushion in a substantially horizontal state, and then, while maintaining the superimposed state, the front is generally moved forward around the front end of the seat cushion. About 90
This is a posture state when the seat is rotated by degrees, and it is possible to position the seat as a whole forward while reducing the length of the seat in the front-rear direction.

[Problems to be solved by the invention]

[0005] As described above, when the height of the seat cushion is set higher in the rearward position, it is desired to obtain a wide flat surface so that the seatback can take the lying position. In this case, it is desired that the ride comfort between the front and rear seats is not significantly different, and particularly that the ride comfort of the rear seat is not significantly reduced as compared with the ride comfort of the front seat.

In a vehicle having three rows of front and rear seats, when the rear seat is double-faulted, the luggage loaded in the rear luggage compartment is prevented from moving to the front, ie, to the first row seat in the front row. While it is desired that the seat be double-faulted does not obstruct the rear view.

[0007] The present invention has been made in view of the above circumstances, and a first object of the present invention is to make the seat back fall down when the height of the seat cushion is set higher as it is located rearward. It is an object of the present invention to provide a seat device for a vehicle in which a large flat surface is obtained by setting the position and the riding comfort of a rear seat is not impaired. The second object of the present invention is to provide a double seat
It is an object of the present invention to provide a vehicle seat device which can satisfy both the prevention of the movement of the luggage loaded in the luggage compartment toward the front row seat and the securing of a sufficient rear view.

[0008]

Means for Solving the Problems In order to achieve the first object, the present invention adopts the following solution. That is, as described in claim 1 of the claims, in a vehicle in which a plurality of seats are arranged in front and rear in a vehicle cabin, the height of the seat cushions of the plurality of seats in the front-rear position is set to the front position. The seat cushion at the rear position is set to be higher than a certain seat cushion, and the thickness of the seat backs of the plurality of seats in the front-back positional relationship is greater than the seat back at the front position. The seat back at the rear position is set to be thinner, and the seat backs of the plurality of seats in the front-rear positional relationship are respectively moved forward and overlapped in a substantially horizontal state on the corresponding seat cushion. When the seat backs of the plurality of seats in the front-back position relationship are respectively set to the lying position, the back of the seat back is Height is to be substantially flush, it is so. A preferred embodiment based on the above solution is described in claim 2 of the appended claims.
To claim 8.

In order to achieve the second object, the present invention adopts the following solution. That is, as described in claim 9 in the claims,
A first row sheet located in the front row, a second row sheet located immediately behind the first row sheet, and a third row located immediately behind the second row sheet and located in the last row In a vehicle configured as a three-row seat with a row seat, the second-row seat and the third-row seat are each capable of being double-faulted, and the height when the second-row seat is double-faulted, The height when the third row shaft is double-faulted is set to be lower. A preferred mode based on the above solution is described in claim 10.
It is as described in.

[0010]

According to the first aspect, since the height of the rear seat cushion is increased, the seat back at the rear position is made thinner. Then, a large flat surface can be obtained as a whole. In addition, since the above-mentioned large flat surface is obtained by making the thickness of the seat back different between the front and rear, the seat back is positioned rearward as compared with the case where a large flat surface is obtained by changing the thickness of the front and rear seat cushions. It is no longer necessary to reduce the thickness of the seat cushion, and the ride comfort of the rear seat can be sufficiently ensured, that is, the same good ride comfort as that of the front seat can be secured (the seat cushion is thicker). The better the ride).

According to the second aspect, each of the seat backs of the second row seat and the third row seat is set to the lying position,
A large flat surface can be obtained. According to the third aspect, a larger flat surface can be obtained by setting the seat back of the passenger seat to the lying position.
According to the fourth aspect, an extremely large flat surface can be obtained by setting all the seat backs of the seats to the lying positions.

According to the fifth aspect, a gap corresponding to the headrest is formed in the obtained flat surface while the flat surface is enlarged by an amount corresponding to the headrest attached to the seat back set in the lying position. Not what you can get. According to the sixth aspect, it is possible to prevent a situation in which a load mounted near the back door directly contacts the thin seat back of the last row seat.

According to the seventh aspect, the flat surface obtained by setting the seat back to the lying position can be further enlarged by the amount of the board member extending substantially horizontally.
Further, the board member extending substantially horizontally can be effectively used as a shelf for vertically dividing the space behind the last row of sheets. According to the eighth aspect, by reducing the reclining amount as the seatback is positioned rearward and becomes weaker in strength due to being thinned, it is possible to prevent an excessive load from being applied to the seatback (the reclining amount is increased). Indeed, the load due to the load from the seated occupant increases.)

According to the ninth aspect, the double-fault height of the second-row sheet located closer to the first-row sheet as the front-row sheet is greater than the double-fault height of the third-row sheet as the last-row sheet. By increasing the height, it is possible to prevent a situation in which a load mounted rearward is inadvertently moved to the first row seat in the front row. Further, since the double-fault height of the third row seats is reduced, the rear view (particularly, a low portion such as a road surface portion near the rear end of the vehicle) can be sufficiently secured.

According to the tenth aspect, the rear view (particularly, a low portion such as a road surface near the rear end of the vehicle) can be sufficiently secured without being obstructed by the seat back at the upright position of the third row seat. It will be preferable. In addition, by reducing the maximum height at the standing position as the seat back becomes thinner and stronger, the load on the swing fulcrum applied by the seated occupant is reduced (the load from the swing fulcrum is reduced). Moment length reduction).

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a floor panel, 2 denotes a front window, 3 denotes a roof panel, 4 denotes a back door, and a window (rear window) of the back door 4 is denoted by reference numeral 4a. The rotation fulcrum at the time is indicated by reference numeral 4b. 5 is an instrument panel, 6 is a steering handle, and 7 is a steering shaft. As is known, the steering mechanism includes a tilt mechanism and a telescopic mechanism.
The position in the vertical direction is adjustable and the position in the front-rear direction is adjustable.

Instrument panel 5 and back door 4
A space between the first row seat 11 and the first row seat 11, which is a front row seat, is provided in the front and rear direction of the vehicle. The second row sheet 12 is provided, and a third row sheet 13 located immediately after the second row sheet 12 and serving as the last row sheet is provided. In the embodiment, the first-row seat 11 has a left-right divided configuration of a driver seat and a passenger seat. As is known, the driver's seat and the passenger's seat are each capable of adjusting the slide position in the front-rear direction and the height position (equipped with a lift mechanism).

The first row seat 11 (driver seat, front passenger seat) includes a seat cushion 11A, a seat back 11B, and a headrest 11C detachably attached to the seat back 11B. The driver's seat and the passenger's seat can be independently adjusted in the front-rear sliding position, the height position is adjustable, and the reclining amount of the seat back 11B is adjustable.

Similarly, the second row seat 12 also includes a seat cushion 12A, a seat back 12B, and a headrest 12C detachably attached to the seat back 12B. The second row of seats 12 is capable of adjusting the amount of sliding in the front-rear direction, and is capable of adjusting the amount of reclining of the seat back 12B. In the embodiment, in the embodiment, the seat cushion 12 </ b> A as a whole is long in one left-right direction in the embodiment, while the seat back 12 </ b> C is divided into left and right parts, but there is substantially no gap between them. The left and right seat backs 12B
Are adjustable independently of each other.

Similarly, the third row seat 13 also includes a seat cushion 13A, a seat back 13B, and a headrest 13C detachably attached to the seat back 13B. In the embodiment, the third-row seat 13 cannot adjust the sliding amount in the front-rear direction in the embodiment, but can adjust the reclining amount of the seat back 13B.
In the embodiment, the third row of seats 13 is configured such that the seat cushion 13A as a whole is long in the left-right direction, while the seat back 13C has a left-right divided configuration, but there is substantially no gap between them. The left and right seatbacks 13B can be adjusted independently of each other.

In the floor panel 1, the mounting portion of the first row seat 11 is the lowest, the mounting portion of the second row seat 12 is slightly higher, and the mounting portion of the third row seat 13 is the highest. The seat cushions 11A to 13A of the front and rear three rows of seats 11 to 13 have substantially the same thickness, so that the ride comfort is substantially the same.
Thereby, the height position of the seat cushion is such that the first row seat cushion 11A is the lowest, the second row seat cushion 12A is slightly higher, and the third row seat cushion 13A is the highest. Have been higher.

The thicknesses of the seat backs of the front and rear three rows of seats 11 to 13 are different from each other. That is, the thickness of the seat back 11B for the first row is the thickest, the seat back 12B for the second row is slightly thinner, and the seat back 13B for the third row is thinnest. The reclining amount of each seat back (the maximum backward tilt angle when the seat back is in the standing position) is set to be smaller as the seat back is thinner. That is, the reclining amount of the third-row seat back 13B is the smallest, the reclining amount of the second-row seat back 12B is an intermediate size, and the reclining amount of the first-row seat back 11B is the largest.

Each of the seat backs 11B to 13B can be largely forwardly moved forward by using the reclining mechanism, and the corresponding seat cushions 11A are provided.
13A, it is possible to take a folded position that is superimposed in a substantially horizontal state. The rear surfaces of the seatbacks 11B to 13B are substantially flat surfaces, and constitute a substantially horizontal storage surface when the seatbacks 11B to 13B are in the lying position.

FIG. 2 shows a state in which all the seat backs 11B to 13B of all the seats 11 to 13 are in the lying position. The front and rear seat cushions 11A described above.
The difference in the height setting of ~ 13A and the almost same setting of the thickness are offset by the setting of the difference in the thickness of each seat back 11B ~ 13B, and the obtained flat surface is substantially horizontal as a whole. The seat backs 11B to 13B are extremely large with no difference in height.

Each of the seatbacks 11B to 13B is brought to the lying position with the headrests 11C to 13C attached. In relation to the front and rear seats, the headrests of the rearwardly located seats are located in the space between the front and rear seatbacks in the lying position, and the space is filled with the headrests. The flat surface does not have a large gap.

Here, the driver's seat back 11B is
In order to be able to take the lying position without interfering with the steering handle 6, the following device is set. First, the maximum sliding position when the driver's seat is slid rearward by the maximum amount is set so as to be considerably behind the normal vehicle. Then, while adjusting the steering handle 6 to the uppermost position and the foremost position, while the driver's seat is in the rearmost maximum sliding position, the seatback 11B is moved forward, whereby the seatback 11B is moved forward. The fall position is set without interfering with the steering handle 6. In this case, the driver's seat headrest 11C is connected to the seat back 11B.
It is also possible to be able to take the lying position with the head rest 11C removed, while keeping the head rest 11C attached.

In any case, the more the rearmost slide position of the driver's seat is set to the rear, the higher the uppermost position of the steering handle 6 is, and the more the frontmost position of the steering handle 6 is, the more forward. Interference with the steering handle 6 is less likely to occur. When the steering handle 6 can be adjusted only in one of the vertical direction and the front-rear direction, or when both cannot be adjusted, the rearmost sliding position of the driver's seat may be set accordingly (headrest). It is possible to arbitrarily select whether the fall position can be set with the 11C attached or the fall position can be set only when the headrest 11C is removed).

FIG. 3 shows a state in which only the third row sheet 13 is double-faulted, and FIG. 4 shows a state in which the second row sheet 12 and the third row sheet 13 are double-faulted, respectively. This double fault can be performed, for example, from the state of the seat back lying down in FIG.
C, 13C are removed), seat cushion 12
A and 13A are obtained by being rotated forward by about 90 degrees as a whole around the lower portion of the front end.

As is clear from FIG. 4, the height of the second row sheet 12 is made higher than that of the third row sheet 13 when double-faulted. In other words, the double-faulted high second row seat 12 is preferable in preventing a situation in which the rear luggage is accidentally moved to the first row seat 11 side. Further, when the occupant seated in the first row seat 11 checks the rear through the rear window 4a, the height of the double-faulted third row seat 13 is low, which is preferable for sufficiently securing the rear view. (See the rear view line in FIG. 4).

When a flat surface is obtained with the seat back in the lying position, a board member 17 extending in a substantially horizontal direction is preferably provided behind the third row of seats 13. The height position of the board member 17 is substantially the same as the height position of the upper surface of the seat back in the lying position (particularly, the third row of seats 13).
(The same as the height position of the upper surface of the seat back 13B at the falling position). The board member 17 extends over substantially the entire length in the vehicle width direction, and its front end is located near the front end of the third-row seat back 13B in the lying position, and its rear end is located near the back door 4. ing.
By providing such a board member 17, it is possible to obtain a flat surface (enlargement of the flat surface) that is continuous with the third-row seat back 13B in the lying position.

When the third row seat back 13B is used as a normal upright position without being in the lying position, the board member 17 is moved up and down in the luggage compartment formed behind the third row seat 13. Can function as shelves (partition walls). In addition, the seat back 1 for the third row
When 3B is used as the standing position, the board member 17
Can be changed so as to extend in the vertical direction, so that the third row of seats 13 can function as a baffle plate for preventing a load behind it from coming into contact with the third row of seats 13.

FIGS. 5 to 7 show examples in which the posture of the board member 17 can be changed between a horizontal posture extending in the horizontal direction and a vertical posture extending in the vertical direction. First, a locking groove 19 extending in the front-rear direction at a predetermined height position is formed on the inner wall surfaces of the left and right rear wheel suspension tower portions 18 located near the side portions of the third row seat 13. (See FIG. 7). The left and right ends of the board member 17 extending in the horizontal direction are
For example, by engaging while sliding from behind, a horizontal posture state is obtained (see FIG. 5).

A pair of upper and lower locking projections 20 are formed on the inner wall surface of the suspension tower 18 at predetermined positions in the front-rear direction. Each of the locking projections 20 is composed of a pair of projections 20a spaced at small intervals in the front-rear direction, and a vertically extending board member 17 is inserted into a gap between the pair of projections 20a from above so as to be vertically movable. The direction and posture are set (see FIG. 7).

FIGS. 8 to 12 show mechanisms for double-faulting the sheet and removing the sheet.
However, the third row sheet 13 will be described as an example. First, a pair of front and rear locking fittings 21 and 22 are fixed to a lower portion of the third row seat 13 (the frame for the seat cushion 13A). The front locking fitting 21 has a locking recess 21a opened forward, and the rear locking fitting 22 has a locking recess 22a opened downward. A pair of front and rear locking pins 23 and 24 are fixed to the vehicle body (floor panel 1) side.
Each of the locking pins 23 and 24 extends short in the vehicle width direction,
The locking concave portion 21a of the front locking member 21 can be disengaged from the front locking pin 23, and the locking concave portion 22a of the rear locking member 22 can be disengaged from the rear locking pin 24. This is possible (FIG. 8 shows this engaged state).

The striker 31 is rotatably held by the lock fitting 21 by a pin 32. Locking recess 2
When the striker 31 is largely rotated clockwise in FIG. 9 with the locking pin 23 engaged with the locking pin 1a, the opening end of the locking recess 21a is released, and By displacing the fastener 21 rearward relative to the locking pin 23, the two 21 and 23 can be disengaged (unlocked state). When the striker 31 is largely rotated in the counterclockwise direction as shown in FIG. 10 in a state where the locking pin 23 is engaged with the locking recess 21a, the opening end of the locking recess 21a is The lock state is closed by the lock 31 so that the lock pin 23 cannot be disengaged from the lock recess 21a.

The striker 31 is urged by a spring 33 toward the locked state shown in FIG. By manually operating the striker 31, for example,
The lock is released as shown in FIG. An arc-shaped guide hole 34 centering on a pin 32 serving as a rotation fulcrum is formed in one of the locking metal member 21 and the striker 31.
On the other hand, a guide pin 35 slidably fitted in the guide hole 34 is fixed, so that the rotation of the striker 31 by a predetermined amount or more is restricted.

A striker 41 is rotatably held by a pin 42 in the locking metal fitting 22 at the rear.
When the striker 41 is largely rotated in the counterclockwise direction as shown in FIG. 11 in a state where the locking pin 24 is engaged with the locking recess 22a, the open end of the locking recess 22a is released. Then, by displacing the locking fitting 22 upward relative to the locking pin 24, the engagement between the two 22 and 24 can be released (unlocked state). Locking recess 2
When the striker 41 is largely rotated in the clockwise direction in FIG. 12 in a state where the lock pin 24 is engaged with the lock pin 2a, the open end of the lock recess 22a is
1 and the locking pin 2
4 is in a locked state where it is impossible to release the engagement.

The striker 41 is urged by a spring 43 toward the locked state shown in FIG. By manually operating the striker 41, for example,
The lock is released as shown in FIG. In order to achieve this unlocked state, the cam plate 45 is rotated in response to the swing of the operation lever 44 which is manually operated. It is movably held. A cam hole 45 is formed in the cam plate 45.
a is formed, the striker 41 has a cam hole 45 formed therein.
A pin member 47 that is slidably fitted in a is fixed. The cam hole 45a is set so that the distance from the mounting pin 46 gradually changes along the circumferential direction.

When the operation lever 44 is swung counterclockwise in FIG. 11, the cam plate 45 is swung counterclockwise in FIG.
It is swung counterclockwise in FIG. 11 around 2 (movement in the unlocking direction). When the unlocking operation force is released from the operation lever 44, the spring 43 causes the operation shown in FIG.
Return to the locked state. The operation lever 44 is linked to the front striker 31 via a link mechanism or a link mechanism such as a wire, so that only one operation lever 44 is operated to unlock the front and rear strikers 31 and 41 simultaneously. Position and at the same time lock position. Although not shown in the drawings, the rear latch 22 is not shown.
The guide hole 34, the guide pin 3 and the
The configuration corresponding to No. 5 is adopted, and the rotation of the striker 41 with respect to the locking fitting 22 by a predetermined amount or more is restricted.

The second row sheet 12 is also shown in FIGS.
Although the structure shown in FIG. 2 is adopted, the locking pins 21 and 22 are provided on the upper rail that is slid with respect to the rail (lower rail) fixed to the vehicle body because of the sliding in the front-rear direction. What should I do? The center of rotation of the seat when a double fault occurs is defined by the front locking pin 2.
3, but it is also possible to remove the seat from the vehicle body and make it a double fault.

Although the embodiment has been described above, the present invention is not limited to this, and includes, for example, the following case. Of the driver's seat and the passenger's seat, which are the first row seats, only the passenger's seat back may be able to take the falling position. Alternatively, only the seat backs of the second row seat 12 and the third row seat may be able to take the lying position. The seats may be arranged in two front and rear rows as a whole, and in this case, at least the front passenger seat back and the rear seat back that are located at the front may be able to assume the lying position.

In the embodiment, the maximum height when the seat back is in the upright position is substantially the same for the third row seat 13 and the second row seat, but by lowering the rear seat, This is preferable for securing a rear view. In particular, in the case of front and rear three-row seats, it is preferable that the maximum height of the seat back at the upright position is sequentially reduced from the front seat to the rear seat. Further, since the thinner and weaker the seat back is, the lower the maximum height at the standing position is, the load on the swing fulcrum applied by the seated occupant is reduced (the load from the swing fulcrum). Shortening of the moment length). The objects of the invention are not limited to those explicitly stated, but also implicitly include providing what is substantially preferred or described as advantages.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a side view showing a state in which all seat backs are in an upright position.

FIG. 2 is a side view showing a state in which all seat backs are in a lying position.

FIG. 3 is a side view showing a state where only a third row sheet is double-faulted.

FIG. 4 is a side view showing a state in which a second-row seat and a third-row seat are double-faulted.

FIG. 5 is an essential part perspective view showing a state in which the board member is extended in the horizontal direction and arranged.

FIG. 6 is a sectional view taken along line X6-X6 in FIG. 5;

FIG. 7 is an essential part perspective view showing a state in which a board member is extended and arranged in a vertical direction.

FIG. 8 is a simplified side view showing a lock mechanism provided under the seat cushion.

FIG. 9 is a side view showing a state where the lock mechanism on the front side shown in FIG. 8 is in an unlocked state.

FIG. 10 is a side view showing a state where the front lock mechanism shown in FIG. 8 is in a locked state.

FIG. 11 is a side view showing a state where the rear lock mechanism shown in FIG. 8 is in an unlocked state.

FIG. 12 is a side view showing a state where the rear lock mechanism shown in FIG. 8 is in a locked state.

[Explanation of symbols]

 1: Floor panel 4: Back door 6: Steering handle 11: First row seat 11A seat cushion 11B seat back 11C headrest 12: Second row seat 12A seat cushion 12B seat back 12C headrest 13: Third row seat 13A: Seat cushion 13B: Seat back 13C: Headrest 17: Board member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuyuki Kimura 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Kenji Nishimura 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. Inside

Claims (10)

[Claims] In a vehicle having a plurality of seats arranged in front and rear in a vehicle cabin, a height of a seat cushion of the plurality of seats in a front-back positional relationship is at a rear position as compared with a seat cushion at a front position. The seat cushion is set to be higher, and the thickness of the seat backs of the plurality of seats in the front-rear position is smaller at the rear position than at the front position. The seat backs of the plurality of seats in the front-rear position relationship are respectively set forward so as to be able to take a lying position superimposed on the corresponding seat cushion in a substantially horizontal state. When the seat backs of the plurality of seats are each in the lying position, the heights of the back surfaces of the seat backs are substantially flush. And a seat device for a vehicle. 2. The sheet according to claim 1, wherein the sheets are a first row sheet located in a front row, a second row sheet located immediately behind the first row sheet, and a second row sheet located immediately behind the second row sheet. A third-row seat that is positioned and positioned in the last row, so that at least each of the seatbacks of the second-row seat and the third-row seat can take the lying position, A seat device for a vehicle, comprising: 3. The vehicle seat apparatus according to claim 2, wherein at least a seat back of a passenger seat in the first row of seats can take the lying position. 4. The seat according to claim 2, wherein, of the first row seats, a driver's seat and a passenger's seat are each capable of taking the lying position. Vehicle seat device. 5. The vehicle according to claim 1, wherein at least a seatback of a seat located rearward among the plurality of seats in the front-rear position relationship can take the lying position with a headrest attached. The vehicle seat device according to claim 1, wherein the headrest attached to a seatback of the rear seat in the lying position is positioned so as to fill a space formed between the seatback and a front seat. 6. The vehicle according to claim 1, wherein the vehicle has a back door, and a board member that shields between a seat located rearmost and the back door is provided. Seat device. 7. The vehicle according to claim 1, wherein the vehicle has a back door, and a seat back of the rearmost seat is located between the seat located rearmost and the backdoor. A seat device for a vehicle, comprising: a board member that extends substantially horizontally at a position substantially at the same height as the seat back at the lying position. 8. The vehicle according to claim 1, wherein the reclining amount of the seat back of the seat located rearward is smaller than the reclining amount of the seat back of the seat located frontward among the plurality of seats in the front-back positional relationship. A vehicle seat device, which is set as follows. 9. A sheet according to claim 1, wherein the first row of sheets is located in the front row, the second row of sheets is located immediately behind the first row of sheets, and the last row of sheets is located immediately behind the second row of sheets. In the vehicle configured as a three-row seat with a third-row seat, the second-row seat and the third-row seat can each be double-faulted, and when the second-row seat is double-faulted The height of the third row shaft when double-faulted is set to be lower than the height of the third row shaft. 10. The seat back according to claim 9, wherein the maximum height of the seat back at the upright position of the third row seat is lower than the maximum height of the seat back at the upright position of the second row seat. A seat device for a vehicle, wherein the vehicle seat device is set to: