JPH08183378A - Seat for vehicle - Google Patents

Abstract

PURPOSE: To expand a foot space for a rear seat occupant also to increase a degree of freedom of a riding attitude by forming an inside omitted part in a seat cushion, also arranging a movable cushion part fitted to this inside omitted part, so as to variously change a seat use condition of a front seat. CONSTITUTION: At ordinary time, an inside omitted part 2A of a seat back main unit 2 is closed by a movable back part 3, also to close an inside omitted part 5A of a seat cushion main unit 5 by a movable cushion part 4. On the other hand, by pulling up a head rest 1 brought down to the front, the movable back part 3 is unlocked and sprung up to the front. Then by opening only the back inside omitted part 2A, through this part a foot of an occupant in a rear seat can be extended onto a seat cushion SC. When the head rest 1 is further pulled up, by largely opening the cushion inside omitted part 5A connected to the back inside omitted part 2A, the foot of the occupant in the rear seat, left as crossed, can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat installed in a front seat of a vehicle, and more particularly to a vehicle seat in which the comfort of a rear seat occupant is pursued.

[0002]

2. Description of the Related Art Various types of conventional vehicle front seats are known.

FIG. 18 shows a vehicle seat disclosed in Japanese Utility Model Laid-Open No. 63-120997.

The seat 210 comprises a seat cushion (seat part) 211 and a seat back (backrest part) 212. The seat back 212 has a seat back main body 214 having a back hollow portion 213 in the lower center, and a seat. The back main body 214 includes a movable back portion 215 that fills the back hollow portion 213. The movable back portion 215 is adapted to open to the rear seat side around the lower end portion thereof.

FIG. 19 shows a vehicle seat disclosed in Japanese Utility Model Laid-Open No. 2-106934.

In the seat 220, the movable back portion that fills the back hollow portion 213 is a front movable back portion 22.
1 and a rear movable back portion 222, and the front movable back portion 221 is disposed in the front portion inside the back hollow portion 213 so that the front movable back portion 221 is pivotally attached to the upper end of the back hollow portion 213. The rear movable back portion 222 is disposed at the rear portion inside the back hollow portion 213 and is pivotally supported at the lower end of the back hollow portion 213 so that the front movable back portion 221 can move forward and backward. The back portion 222 is opened rearward.

FIG. 20 shows a vehicle seat described in Japanese Utility Model Laid-Open No. 1-145843.

The seat 230 is a seat back 212.
By rotatably connecting the middle portion in the height direction of the vehicle to the tip of the swing arm 231 connected to the seat cushion 212 with a pin 232, the seat back 212 of the front seat can be placed at a position distant from the rear seat 250. Be able to fold, 2 rear seats
The 50 occupants N can extend their legs Nf onto the seat cushion.

[0009]

By the way, in such a conventional vehicle front seat, an opening is formed at the center of the lower part of the seat back 212 or the seat back 212 is folded to a far front position as needed. By stroking, the feet can be thrown onto the seat cushion 211 in the front seat, but the seat cushion portion does not move in that position, so the rear seat occupant may not be able to take a free posture. there were. That is, when a passenger in the rear seat tried to throw his legs forward while wearing his shoes, or attempted to cross his legs, there was space limitation and he could not take such a posture.

This point will be described with reference to FIG.

First, the passenger in the rear seat is in the A position (regular seating position).
If you take, even if it is a conventional seat, there is no inconvenience of your feet (○). Next, when trying to take a B posture (a relaxed posture in which the legs are extended to the front), in the conventional seat, the cushion portion of the front seat is present in front of the feet. There was not (x).
Further, in the C posture (the posture in which the feet are thrown on the front seat cushion), there is no problem even with the conventional seat (◯). In addition, when trying to take the D posture (the posture in which the legs are crossed), it was difficult as in the B posture (×).

Then, in order to solve the above problems, the following can be considered.

For example, (1) the cushion length of the front seat is shortened to increase the slide amount of the front seat. (2) Remove the front seat. (3) Fold the front seat with the frame forward.

However, such a method has a large layout restriction, and when a passenger gets into the front seat, it takes time and effort to restore the vehicle to its original state, and the driver feels uncomfortable. However, there are problems and the feasibility becomes less.

In consideration of the above circumstances, the present invention can easily change the seat state of the front seat when the front seat is not used, thereby expanding the space in front of the feet of the rear seat occupants. The flexibility of the posture of the rear seat occupants,
It is an object of the present invention to provide a vehicle seat that can improve passenger comfort.

[0016]

According to a first aspect of the present invention, there is provided a vehicle seat including a seat back and a seat cushion, which is installed in front of a rear seat, in a predetermined range from a rear end of the seat cushion to a front side. It is characterized in that a cushion hollow portion for forming a space is provided, and a movable cushion portion that is fitted to the cushion hollow portion and is movable substantially forward to form the space is provided.

According to a second aspect of the invention, there is provided the vehicle seat according to the first aspect, wherein a back hollow portion for forming a space in a predetermined range from a lower end of the seat back to an upper side is provided, and the back is provided. It is characterized in that a movable back portion that fits in the hollow portion and is movable to form the space is provided.

The invention of claim 3 is the vehicle seat according to claim 1, characterized in that the movable cushion portion is capable of flipping up.

According to a fourth aspect of the invention, there is provided the vehicle seat according to the second aspect, wherein the movable cushion portion is movably supported by a front end portion thereof being rotatably supported by the seat cushion portion so as to be flipped forward and upward. The back portion is characterized in that the upper end portion is rotatably supported by the seat back so as to bounce upward and forward.

According to a fifth aspect of the present invention, in the vehicle seat according to the second aspect, the movable cushion portion is slidably supported by the seat cushion forward, and the movable back portion bounces forward and upward. The upper end portion is rotatably supported by the seat back for raising.

According to a sixth aspect of the present invention, in the vehicle seat according to the second aspect, the movable cushion portion is integrally and interlockingly connected to a lower end of the movable back portion, and the movable back portion has an upper front portion. The upper end portion is rotatably supported by the seat back in order to bounce up.

The invention of claim 7 is the vehicle seat according to claim 4, wherein a movable cushion part flip-up mechanism for flipping up the movable cushion part is provided, and the movable back part flips up. It is characterized by having a mechanism.

According to an eighth aspect of the present invention, in the vehicle seat according to the seventh aspect, a ranking mechanism for operating the movable cushion portion flip-up mechanism after the movable back portion flip-up mechanism is operated is provided. Is characterized by.

The invention according to claim 9 is the vehicle seat according to claim 7, wherein an operating mechanism for operating the operation of the movable cushion portion and the movable back portion is provided, and the operating mechanism is the seat back body. Is incorporated into a support mechanism for a headrest mounted on the upper end of the headrest, and at least one of a vertical movement operation and a forward tilting operation of the headrest is used as an operation force.

A tenth aspect of the present invention is the vehicle seat according to the seventh or ninth aspect, wherein the movable back portion flip-up mechanism urges the movable back portion toward the forward flip-up position. It is characterized by comprising a spring and a lock means for locking the movable back portion at a position for filling the back hollow portion of the seat back.

The invention of claim 11 is the vehicle seat according to claim 7 or 9, wherein the movable cushion portion flip-up mechanism directs the movable cushion portion to a front flip-up position. A return spring to urge,
It is characterized in that it comprises lock means for locking the movable cushion portion at a position for closing the cushion hollow portion of the seat cushion.

According to a twelfth aspect of the invention, there is provided the vehicle seat according to the seventh aspect, wherein the rear seat occupant movement detecting means for detecting the forward movement of the seated occupant in the rear seat and the output of the detecting means. It has a control means for operating the movable back portion flip-up mechanism and the movable cushion portion flip-up mechanism.

A thirteenth aspect of the present invention is the vehicle seat according to the twelfth aspect, wherein an electric seat for moving the seat in the front-rear direction is provided as the rear seat, and the slide amount detecting means of the electric seat is the above-mentioned. It is characterized in that it is used as a rear seat occupant movement detecting means.

According to a fourteenth aspect of the present invention, in the vehicle seat according to the twelfth aspect, the rear seat occupant movement detecting means is a load sensor arranged in a rear seat cushion, and an output of the load sensor. And a center-of-gravity movement estimation unit that estimates the movement of the center of gravity of the occupant according to the above.

[0030]

According to the first aspect of the present invention, when the movable cushion portion is moved substantially forward from the movable cushion hollow portion, a space can be formed in a predetermined range from the rear end of the seat cushion to the front side. it can.

According to the invention of claim 2, in addition to the operation of the invention of claim 1, when the movable back is moved from the back hollow portion, a space can be formed in a predetermined range from the lower end of the seat back to the upper side. Therefore, it is possible to form a wide space together with the space in the cushion hollow portion.

According to the invention of claim 3, in addition to the operation of the invention of claim 1, the movable cushion portion can be flipped up.

According to the invention of claim 4, in addition to the operation of the invention of claim 2, the movable cushion portion can be flipped up with the front end portion as the center of rotation. Further, the movable back portion can be flipped upward and forward with the upper end portion as the center of rotation.

According to the invention of claim 5, in addition to the operation of the invention of claim 2, the movable cushion portion can be slid forward with respect to the seat cushion. Further, the movable back portion can be flipped up with respect to the seat back with the upper end portion as the center of rotation.

According to the invention of claim 6, in addition to the operation of the invention of claim 2, the movable cushion portion and the movable back portion can be integrally lifted upward with the upper end portion of the movable back portion as the center of rotation. .

According to the invention of claim 7, in addition to the operation of the invention of claim 4, the movable cushion portion can be flipped up by the movable cushion portion flip-up mechanism. Moreover, the movable back portion can be flipped up by the movable back portion flip-up mechanism.

According to the invention of claim 8, in addition to the operation of the invention of claim 7, it is possible to operate the movable cushion part flip-up mechanism after the movable back part flip-up mechanism is operated by the ranking mechanism. Therefore, the movable back portion can be flipped up first, and then the movable cushion portion can be flipped up.

In the ninth aspect of the invention, in addition to the effect of the seventh aspect of the invention, the movable back portion and the movable cushion portion can be flipped up by operating the headrest.

According to the tenth aspect of the invention, in addition to the operation of the seventh or ninth aspect of the invention, when the front seat is used, when the movable back portion is locked at the position where the movable back portion is fitted in the back hollow portion, the ordinary seat is used. Can be used as On the other hand, when the front seat is not used, when the lock by the locking means is released, the movable back portion automatically jumps up by the urging force of the return spring, and a space for the rear seat occupant to extend his / her legs can be formed. When the front seat is used again, the movable back portion is returned against the biasing force of the return spring and locked by the locking means, so that the seat can be used again as a normal seat.

According to the eleventh aspect of the invention, in addition to the action of the seventh or ninth aspect of the invention, when the front cushion is used, the movable cushion is locked by the locking means at a position where the movable cushion is fitted into the cushion hollow portion. It can be used as a normal sheet. On the other hand, when the lock is released by the lock means when the front seat is not used, the movable cushion part jumps up to the front position by the urging force of the return spring, and a space for the rear seat occupant to extend his / her leg can be created. Also,
When the front seat is used again, the movable cushion part is returned against the biasing force of the return spring and is locked by the locking means, so that the seat can be used again as a normal seat.

According to the twelfth aspect of the invention, in addition to the action of the seventh aspect of the invention, when the rear seat occupant movement detecting means detects the forward movement of the rear seat occupant, the movable back portion flip-up mechanism and the movable cushion portion bounce. The lifting mechanism operates to automatically create a space in front of the occupant's feet so that the rear seat occupants can freely extend their legs.

According to the thirteenth aspect of the invention, in addition to the function of the twelfth aspect of the invention, in the case where the rear seat is an electric seat, when the electric seat is moved forward, the movable back portion automatically jumps up or the movable cushion portion is moved. As the car moves forward, the space in front of the feet of the rear seat occupants expands and the legs can be extended freely.

According to the fourteenth aspect of the invention, in addition to the function of the twelfth aspect of the invention, when the occupant in the rear seat moves forward or the body is extended and the waist is slid forward, the occupant moves due to the movement of the center of gravity. Is estimated, and accordingly, the movable back portion automatically jumps up or the movable cushion portion moves forward, so that the space in front of the feet of the rear seat occupant is expanded, and the legs can be freely extended.

[0044]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a schematic structure of a vehicle seat of the embodiment. First, the schematic structure of the seat of the embodiment will be described based on this drawing. [Schematic Description of Embodiments] This seat is a seat for a front seat of a vehicle, and includes a seat cushion (seat portion) SC and a seat back (back portion) SB provided with a headrest 1.

The seat back SB comprises a seat back body 2 having a rectangular back hollow portion 2A from the center to the lower end, and a movable back portion 3 arranged so as to be fitted in the back hollow portion 2A. It is configured. A space is formed in a predetermined range from the lower end of the seat back SB to the upper side by the back hollow portion 2A.

The seat cushion SC comprises a seat cushion main body 5 having a rectangular cushion hollow portion 5A from the center to the rear portion, and a movable cushion portion 4 arranged so as to fill the cushion hollow portion 5. It is configured. A space is formed in a predetermined range from the rear end of the seat cushion SC to the front by the cushion hollow portion 5A.

Back hollow portion 2A of the seat back body 2
And the cushion hollow portion 5 of the seat cushion main body 5 are continuous with each other, and when the movable back portion 3 and the movable cushion portion 4 are moved from the hollow portions 2A and 5A, respectively, in the lower rear portion of the seat, A large empty space is secured by the cutouts 2A and 5A.

The lower end of the seat back main body 2 is pivotally supported on the rear end of the seat cushion main body 5, and the seat back SB is operated by operating the back angle lever 6.
The back angle can be adjusted between the seat cushion SC and the seat cushion SC.

The movable back portion 3 has an upper end hinged to the upper end of the back hollow portion 2A of the seat back body 2, and as shown in the drawing, moves forward from the position fitted to the back hollow portion 2A. It can be flipped up. Further, the movable cushion portion 4 has a front end hinged to the front end of the cushion hollow portion 5 of the seat cushion body 5,
As shown in the drawing, it is possible to flip up forward from the position fitted to the cushion hollow portion 5.

The order of flipping up is preset so that the movable back portion 3 and then the movable cushion portion 4 are set in advance, and when both are flipped up in this order, as shown in the figure, the movable back portion 3 is moved. The dimensional relationship is such that the flipped up rear end of the movable cushion portion 4 is located below the front portion.

On both sides of the rear end of the movable cushion portion 4, cutouts 4a, which are fitted to the lower portion of the seat back body 2,
4b is provided. [Detailed Description of Embodiments] Next, the seats of the embodiments will be described in detail with reference to FIGS.

FIG. 2 is an exploded perspective view showing the overall structure of the seat of the embodiment. First, the seat back SB side will be described. As shown in FIG. 2, the seat back main body 2 is a seat back main body frame 1 formed into a U-shape with an open lower end.
3, the movable back portion 3 is mainly configured by a seat back movable frame 31 provided with an S spring 30.

The seat back movable frame 31 is formed in a U-shape with an open upper end, is disposed inside the seat back main body frame 13, and the upper end is connected to the seat back main body frame 13 by a pin 12. , Is rotatably supported so that it can be flipped up and forward.

FIG. 3 shows details of the connecting portion (hinge connecting portion).

A return spring 41 is attached to the pin 12, and the seatback movable frame 31 is biased in the upward direction by the return spring 41.

As shown in FIG. 2, when the seat back movable frame 31 is accommodated in the seat back main body frame 13, the frame support 29 for receiving the seat back movable frame 31 is accommodated. And a hook 28 that locks the seat back movable frame 31 so as not to move by engaging with the cam 17 provided on the seat back movable frame 31 in a state where the seat back movable frame 31 is pressed against the frame support base 29. Has been.

The hook 28 and the cam 17 constitute a lock means L1 for locking the movable back portion 3 at a position for closing the back hollow portion 2A of the seat back body 2, and this lock means L1 and the return shown in FIG. The spring 41 constitutes a movable back portion flip-up mechanism S that flips up the movable back portion 3 forward from the position where the back hollow portion 2A is filled.

FIG. 4 shows details of the locking means L1 of the movable back portion 3.

The hook 28 is rotatably connected to the seat back main body frame 13 shown by hatching in the drawing by a shaft 46, and is biased in the locking direction by a return spring 47. And this hook 2
8 is engaged with the cam 17 when the seat back movable frame 31 is pressed against the frame support base 29,
The seat back movable frame 31 is adapted to be locked.

The hook 28 has a first lock release member.
11 are connected to each other, and the hook 28 can be moved in the unlocking direction by pulling the first wire 11. Normally, the first wire 11 is kept loose. Further, the seat back body frame 13 is provided with a hook stopper 48 that stops the hook 28 at a predetermined position when the first wire 11 is loosened.

The locking means constructed in this way are arranged symmetrically.

The relationship between the hook 28 and the cam 17 is as follows.

That is, the seat back movable frame 31
Is returned to the lock position and, as shown in FIG. 7 (1), when the cam 17 moves toward the lock position (moves in the direction of arrow a), the outer peripheral edge 17a of the moving cam 17 is moved.
However, as shown in (2), by slidingly contacting the outer peripheral edge 28a of the hook 28 stopped by the hook stopper 48,
The hook 28 is moved in the anti-lock direction (arrow B direction). Then, as shown in (3), when the cam 17 reaches the lock position, the hook 28 returns to the lock position, and the hook 28
Engages with the cam 17.

Next, the seat cushion side will be described.

As shown in FIG. 2, the seat cushion main body 5 is mainly composed of a pair of left and right seat cushion main body frames 19, and the movable cushion portion 4 comprises a rectangular seat cushion movable frame 22 provided with an S spring 23. It is composed of the subject.

The seat cushion movable frame 22 is disposed inside the seat cushion body frame 19,
By connecting the front end to the seat cushion body frame 19 with a pin 21, the front end is rotatably supported so as to be able to flip up forward.

FIG. 5 shows the details of the connecting portion (hinge connecting portion).

A return spring 42 is attached to the pin 21, and by this return spring 42,
The seat cushion movable frame 22 is biased in the upward direction.

As shown in FIG. 2, the seat cushion body frame 19 has a frame support 25 for receiving the seat cushion movable frame 19 when the seat cushion movable frame 22 is housed in the seat cushion body frame 19. And a hook 24 that locks the seat cushion movable frame 22 so that it does not move while meshing with the cam 18 provided on the seat cushion movable frame 22 while the seat cushion movable frame 22 is pressed against the frame support base 25. Has been.

The hook 24 and the cam 18 constitute a lock means L2 for locking the movable cushion portion 4 at a position for closing the cushion hollow portion 5A of the seat cushion body 5, and the lock means L2 and the return spring 42 are provided. Configures a movable cushion portion flip-up mechanism R that flips up the movable cushion portion 4 forward from a position where the cushion hollow portion 5 is filled.

FIG. 6 shows the locking means L of the movable cushion portion 4.
2 shows the details.

The hook 24 is rotatably connected to the seat cushion body frame 19 shown by hatching in the figure by a shaft 44, and is biased in the locking direction by a return spring 43. When the seat cushion movable frame 22 is pressed against the frame support base 25, the hook 24 meshes with the cam 18 and locks the seat cushion movable frame 22.

The hook 24 has a second lock releasing member.
Wire 10 is connected, and by pulling the second wire 10, the hook 24 can be moved in the unlocking direction. Normally, the second wire 10 is kept loose. In addition, when the second wire 10 is loosened in the seat cushion body frame 19,
A hook stopper 45 for stopping the hook 24 at a predetermined position is provided.

The locking means L2 thus constructed is
It is arranged symmetrically.

The relationship between the hook 24 and the cam 18 is the same as that described above. The seat cushion movable frame 22 is returned to the lock position, and the cam 8 is moved to the lock position as shown in FIG. 7 (1). The outer peripheral edge 18a of the cam 18 that moves when it moves in the direction (movement in the direction of arrow a)
However, as shown in (2), by slidingly contacting the outer peripheral edge 24a of the hook 24 stopped by the hook stopper 45,
Move the hook 24 in the anti-lock direction (arrow B direction). Then, as shown in (3), when the cam 18 reaches the lock position, the hook 24 returns to the lock position, and the hook 24
Engages with the cam 18.

As described above, the seat back movable frame 3
As shown in FIG. 2, the seat back main body frame 13 to which 1 is attached and the seat cushion main body frame 19 to which the seat cushion movable frame 22 is attached are mutually connected by a shaft 14 for adjusting a back angle, The back angle can be adjusted by operating a back angle lever provided on the shaft 14.

Next, the operation mechanism for flipping up the movable back portion 3 and the movable cushion portion 4 will be described.

The operating mechanism is incorporated in the support mechanism of the headrest 1 in this embodiment. FIG. 8 shows the details of the headrest 1, and FIG. 9 shows the support mechanism of the headrest.

As shown, the headrest pipe 7 fixed to the lower end of the headrest 1 is inserted into the headrest support pipe 9 fixed to the seatback body frame 13. The headrest 1 is supported thereby. The headrest pipe 7 has a hinge 34 midway in the length direction, and the hinge 34 allows the headrest 1 to be tilted forward.

The headrest pipe 7 is formed with first to third notches 35, 36 and 37 which are engaged with the lock pin 8 at appropriate positions when the pipe 7 is moved vertically. The first notch 35 at the upper end is the hinge 3
The two second and third notches 36,3 below and above
7 is below the hinge 34.

At the lower end of the headrest pipe 7, the tip of the first wire 11 for releasing the locking means of the movable back portion 3 and the second wire for releasing the locking means of the movable cushion portion 4 are described. The tips of 10 are connected.

The lock pin 8 of the headrest 1 is shown in FIG.
As shown in FIG. 3, the lock pin is inserted into the lock pin outer cylinder 38 fixed to the headrest support pipe 9, and is biased in the lock direction by the return spring 39. Then, by pulling the lock pin 21 to disengage the cutouts 35, 36, 37, the headrest pipe 7 can be moved up and down.

The relationship between the lock pin 8, the headrest 1, and the first and second wires 11 and 10 is as follows.

When the lock pin 8 is engaged with the first notch 35 in the upper end of the headrest pipe 7, the hinge 34
Are located in the headrest support pipe 9. Therefore,
The headrest 1 cannot lean forward and is in an upright state. At this time, both the first and second wires 11 and 10 are in a loose state.

When the lock pin 8 is engaged with the second cutout 36, the hinge 34 is located outside the headrest support pipe 9. Therefore, the headrest 1 can be tilted forward. At this time, the first wire 11 is in a tensioned state and the second wire 10 is in a loosened state.

When the lock pin 8 is engaged with the third cutout 37, the hinge 34 is located outside the headrest support pipe 9. Therefore, the headrest 1 can be tilted forward. At this time, the first wire 11 and the second wire
Both wires 10 are in a tension state.

In this way, the first wire 11 and the second wire 10 can be tensioned in order depending on the position where the headrest 1 is pulled out. Accordingly, this constitutes a ranking mechanism T which releases the locking means of the movable back portion 3 when operated in the first step and releases the locking means of the movable cushion portion 4 when operated in the second step.

As shown in FIG. 2, seat back side urethanes 15 and 27 are attached to the sides of the seat back body frame 13 having the above structure, and seat cushion side urethanes 16 and 26 are attached to the side of the cushion body frame 19. The seat back movable frame 31 is attached with the movable back urethane 32 with the grip 40 attached thereto.
By attaching the movable cushion urethane 33 to 2, the vehicle seat of the embodiment is configured. In addition, the cushion body frame 19 is mounted on the seat rail 20 fixed to the vehicle body so as to be slidable in the front-rear direction, so that the seat of the embodiment is installed in the vehicle.

Next, the operation will be described.

In the normal state, in FIG. 1, the movable back portion 3 closes the back hollow portion 2A of the seat back body 2, and the movable cushion portion 4 closes the cushion hollow portion 5 of the seat cushion body 5. As a result, it can be used in the same manner as a normal sheet.

In this initial state, the lock pin 8 of the headrest 1 shown in FIGS. 9 and 10 meshes with the first notch 35, and the headrest 1 is in the upright state. Further, since both the first and second wires 11 and 10 are loose, the locking means L1. Both L2 are in the lock position, and the movable back portion 3 and the movable cushion portion 4 are locked in the fixed positions.

From this state, while pulling out the lock pin 8 from the first cutout 35, the headrest 1 is pulled up and tilted forward to fix the lock pin 8 at the position of the second cutout 36. Then, although the second wire 10 remains slack, the first wire 11 is pulled, whereby the hook 28 of the locking means of the movable back portion 3 is pulled in the unlocking direction, and the lock is released. . And
When the hook 28 is disengaged, the reaction force of the return spring 41 fixed to the shaft 12 causes the movable back portion 3 to move.
Jumps forward as shown in FIG.

In this state, only the back hollow portion 2A of the seat back SB is opened, so that the rear occupant can extend his / her foot onto the seat cushion SC through the back hollow portion 2A as in the conventional case. At this time, it becomes difficult to see the front because the posture is lost, but in this embodiment, the headrest 1 is tilted forward, which can be eliminated.

Next, when the headrest 1 is further pulled up and the lock pin 8 is fixed at the position of the third notch 37 in FIGS. 9 and 10, the second wire 10 is also pulled to lock the movable cushion portion 4. Means hook 24
Is pulled in the unlocking direction to unlock. Then, when the hook 24 is disengaged, the movable cushion portion 4 jumps forward as shown in FIG. 1 by the reaction force of the return spring 42 fixed to the shaft 21, and the cushion hollow portion 5 of the seat cushion body 5 becomes The seat back main body 2 is widened in a continuous manner with the back hollow portion 2A, and a space is secured in front of the feet of the rear seat occupant so that they can extend their legs while wearing shoes or extend their legs while assembled. . Therefore, any of the postures of A to D in FIG. 17 can be freely taken, and the comfort is remarkably improved.

Next, when the movable back portion 3 and the movable cushion portion 4 are returned to their original positions, the lock pin 8 is pulled out and the headrest 1 and the headrest pipe 7 are pushed back to their original positions in FIGS. 9 and 10. The lock pin 8 is fixed at the position of the first notch 35. Then, the first and second wires 1
Since 0 and 11 are both in a loosened state, the return springs 47 and 43 of the locking means act to hooks 28 and 2
4 returns to the positions of the hook stoppers 48 and 45. In this state, the rear seat occupant can move the movable back urethane 3 of the movable back portion 3
The seat back grip 40 attached to 2 is pulled back toward you. Then, as shown in FIG. 1, the upper movable back portion 3 is pulled downward, so that the lower movable cushion portion 4 is pushed downward, and the cushion hollow portion 5 of the seat cushion body 5 is pushed down. Fit in. Further, the movable back portion 3 is pulled rearward and fits into the back hollow portion 2A of the seat back body 2.

Then, the cam 1 of each locking means L1, L2
The outer peripheral edges 17a, 18a of the 7, 18 are hooks 28, 24.
7 by slidingly contacting the outer peripheral edges 28a and 24a of FIG.
In the order of (1) → (2) → (3), the hooks 28 and 24 mesh with the cams 17 and 18, and the movable back portion 3 and the movable cushion portion 4 are fixed to the initial positions.

The case where the movable back portion 3 and the movable cushion portion 4 are moved by manually operating the headrest 1 has been described above, but the hook 2 of each of the locking means L1 and L2 has been described.
It is also possible to electrically configure the mechanism for releasing 8 and 24 and to release the lock by an operation signal such as a switch.

In that case, when a certain condition is satisfied, the lock may be automatically released and the seat (the movable back portion 3 and the movable cushion portion 4) may be flipped up.

Further, the movable back portion 3 and the movable cushion portion 4 are not moved by the lock release operation by the force of the return spring, but are flipped up and returned automatically by an electric drive mechanism. You can also

For example, the forward movement of the rear seat occupant may be detected by the rear seat occupant movement detecting means, and when the movement is detected, the control means may be configured to execute the seat flip-up operation.

Specifically, when the rear seat is provided with an electric seat that can be automatically moved back and forth, the front seat is flipped up in response to a signal that detects the amount of forward movement of the electric seat. It is possible to execute it.

FIG. 12 is a conceptual explanatory view in that case.

When the rear seat 49 is a power seat (electric seat), when the rear seat occupant operates the power seat, the front-back movement amount P1 thereof is detected. Then, the heel point movement amount P2 is calculated accordingly, and when the value exceeds a certain reference, the seat (movable back portion 3 and movable cushion portion 4) is flipped up.

When the rear seat is not an electric seat, for example, as shown in FIG. 13, a load sensor is installed on the rear seat, and based on these signals, the amount of movement of the occupant's center of gravity positions 50, 51 is determined by a microcomputer (center of gravity movement estimating means). To estimate. Then, the heel movement amount P corresponding to the movement amount P1
When 2 is calculated and the value exceeds the reference, the seat (movable back portion 3 and movable cushion portion 4) is flipped up.

The seat (movable back portion 3 and movable cushion portion 4) may be automatically flipped up when it is detected that the rear seat occupant tries to cross his legs.

As a method of detecting the attempt to assemble the legs, for example, the following method can be adopted. As shown in FIG. 14, the load sensor (not shown) arranged on the front end portion 54 of the rear seat cushion 55 uses the initial load of the left thigh load point 52 and the right thigh load point 53 when the occupant is seated. To measure. Then, the load change at the load points 52 and 53 is measured, and when the magnitude relationship between the load points changes, it is determined that it is necessary to cross the legs, and the seat is automatically flipped up.

When such automatic seat bounce control is performed, the use state of the front seat is detected by the detecting means so that the seat bounce is performed only when the front seat is not used. Needless to say.

Next, another embodiment of the present invention will be described.

In the seat of the embodiment shown in FIG. 15, the movable cushion portion 4 is slid forward rather than being flipped up. In this seat, a slide guide (not shown) of the movable cushion portion 4 is provided in advance on the seat cushion body 5, and the movable cushion portion 4 is attached to this slide guide.

Therefore, also in this embodiment, the hollow portions 2A,
A large space can be secured by 5A, and the same effects as those of the above-described embodiment can be obtained. In addition, in this embodiment, since the movable cushion portion 4 is a slide type, a straight space can be formed in front of the hollow portion 2A, and a long object can be accommodated.

In the seat of the embodiment shown in FIG. 16, when the movable back portion 3 is flipped up by connecting the rear end of the movable cushion portion 4 to the lower end of the movable back portion 3 through a bending mechanism. In addition, the movable cushion portion 4 is made to jump up together.

The bending mechanism Q connects the seat back movable frame and the seat cushion movable frame. Therefore, also in this embodiment, a large space can be secured by the hollow portions 2A and 5A, and the same effect as that of the above embodiment can be obtained.

Further, in this embodiment, since the movable back portion 3 and the movable cushion portion 4 are integrally flipped upward, the back hollow portion 2A is formed in substantially the same manner as in the embodiment of FIG.
A straight space can be formed in front of
It is also possible to accommodate long objects.

[0115]

As described above, according to the invention of claim 1, when the movable cushion portion is moved, a space is formed in a predetermined range from the front end of the seat cushion to the front side, and the rear seat is formed in that space. The occupants can extend their legs while wearing shoes. Therefore, the flexibility of the posture of the rear seat occupant is widened, and the comfort is significantly improved.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the movable back portion is moved, a space is formed in a predetermined range from the lower end of the seat back to the upper side, and the seat cushion is formed. A large space is formed together with the formed space. Therefore, a passenger in the rear seat can extend his / her legs while wearing shoes, or extend his / her legs in the space. Therefore, the posture of the rear seat occupant can be more freely set, and the comfort can be improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, a space can be formed in the seat cushion by flipping up the movable cushion portion, and the space can be easily formed.

According to the invention of claim 4, in addition to the effect of the invention of claim 2, the movable cushion portion can be flipped up with the front end portion as a rotation center, and the movable back portion can be forwardly and upwardly with the upper end portion as a rotation center. Can bounce up to. Therefore, a wide space can be formed easily and quickly by simply moving the movable cushion portion and the movable back portion.

According to the invention of claim 5, in addition to the effect of the invention of claim 2, the flip-up mechanism need only be provided on the movable back portion side, and the structure is simplified. In addition, a straight space is formed in front of the back hollow portion, so that a long object can be accommodated.

According to the invention of claim 6, in addition to the effect of the invention of claim 2, since the movable cushion portion and the movable back portion are flipped up integrally, the flipping mechanism can be simplified. In addition, a space can be formed in front of the back hollow portion, so that a long object can be accommodated.

According to the invention of claim 7, in addition to the effect of the invention of claim 4, the movable cushion portion and the movable back portion can be easily flipped up by the movable cushion portion flip-up mechanism and the movable back portion flip-up mechanism. , The operation becomes extremely easy.

According to the eighth aspect of the invention, in addition to the effect of the seventh aspect of the invention, by controlling the flip-up order of the movable back portion and the movable cushion portion, the operation can be performed smoothly and surely.

According to the invention of claim 9, in addition to the effect of the invention of claim 7, it is possible to easily secure a space for the rear seat occupant to extend his legs only by operating the headrest. You can easily perform the operation to expand the space under your feet.

According to the tenth aspect of the invention, in addition to the effect of the seventh or ninth aspect of the invention, the movable back portion can be automatically flipped up by releasing the lock by the lock means. Further, if the movable back portion is returned to the position where the back hollow portion is closed and locked by the locking means, it can be used as a normal sheet. Therefore, the operation is simple, and the mechanism is simple and inexpensive.

According to the eleventh aspect of the invention, in addition to the effect of the seventh or ninth aspect of the invention, the movable cushion portion can be automatically moved forward by unlocking the lock means. Further, if the movable cushion portion is returned to the position where the cushion hollow portion is closed and locked by the locking means, it can be used as a normal seat. Therefore, the operation is simple, and the mechanism is simple and inexpensive.

According to the twelfth aspect of the invention, in addition to the effect of the seventh aspect of the invention, when the rear-seat occupant moves forward, the seat in the front seat automatically moves, so that the foot of the rear-seat occupant is forwardly moved. The space that can be extended is expanded. Therefore, no operation is required.

According to the thirteenth aspect of the invention, in addition to the effect of the twelfth aspect of the invention, when the rear electric seat is moved forward,
The movable back portion and the movable cushion portion are automatically moved, so that the space in front of the feet of the rear seat occupant is expanded and the legs can be freely extended. Therefore, without any operation,
Comfort can be improved.

According to the fourteenth aspect of the invention, in addition to the effect of the twelfth aspect of the invention, when the occupant in the rear seat moves the center of gravity forward, the movable seat back and the movable seat cushion automatically move and the occupant of the rear seat occupies the seat. The space in front of your feet expands, allowing you to stretch your legs freely. Therefore, comfort can be improved without requiring any operation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a vehicle seat according to an embodiment of the present invention in a certain usage mode.

FIG. 2 is an exploded perspective view showing the internal structure of the seat of the embodiment.

FIG. 3 is a front view showing details of a hinge joint portion of the seat back movable frame in the seat of the embodiment.

FIG. 4 is a side view showing details of lock means of the seat back movable frame in the seat of the embodiment.

FIG. 5 is a front view showing details of a hinge coupling portion of the seat cushion movable frame in the seat of the embodiment.

6A and 6B are diagrams showing details of a locking means of the seat cushion movable frame in the seat of the embodiment, FIG. 6A is a side view and FIG. 6B is a front view.

FIG. 7 is an operation explanatory view of the locking means of the movable frame in the seat of the embodiment.

FIG. 8 is a side view showing details of a headrest in the seat of the embodiment.

FIG. 9 is a side view showing details of a headrest support mechanism in the seat of the embodiment.

FIG. 10 is a side sectional view showing details of a locking means of the headrest in the seat of the embodiment.

FIG. 11 is a perspective view showing another usage mode of the seat of the embodiment.

FIG. 12 is a conceptual explanatory diagram of a control system according to another embodiment of the present invention.

FIG. 13 is a conceptual explanatory diagram of another example of the control system in another embodiment of the present invention.

FIG. 14 is a conceptual illustration of yet another control system according to another embodiment of the present invention.

FIG. 15 is a perspective view showing a schematic configuration of still another embodiment of the present invention.

FIG. 16 is a perspective view showing a schematic configuration of still another embodiment of the present invention.

FIG. 17 is a functional comparison diagram of the vehicle seat of the present invention and the conventional vehicle seat.

FIG. 18 is a perspective view of a vehicle seat of Conventional Example 1.

FIG. 19 is a perspective view of a vehicle seat of Conventional Example 2.

FIG. 20 is a side view showing a usage state of a vehicle seat of Conventional Example 3.

[Explanation of symbols]

 1 Headrest 2 Seat back main body 2A Back hollow part 3 Movable back part 4 Movable cushion part 5 Seat cushion main body 5A Cushion hollow part 13 Seat back main frame 31 Seat back movable frame 19 Seat cushion main frame 22 Seat cushion movable frame L1 lock Means L2 Locking means S Movable back part flip-up mechanism R Movable cushion part flip-up mechanism T Ordering mechanism

Claims (14)

[Claims] 1. A vehicle seat, which comprises a seat back and a seat cushion and is installed in front of a rear seat, having a cushion hollow portion for forming a space in a predetermined range from a rear end of the seat cushion to a front side. A vehicle seat provided with a movable cushion part that fits in the cushion hollow part and is movable substantially forward to form the space. 2. The vehicle seat according to claim 1, wherein a back hollow portion for forming a space in a predetermined range from a lower end of the seat back to an upper side is provided, and the back hollow portion is fitted into the back hollow portion. A vehicle seat, characterized in that a movable back portion that is movable to form the space is provided. 3. The vehicle seat according to claim 1, wherein the movable cushion portion is capable of flipping up. 4. The vehicle seat according to claim 2, wherein the movable cushion portion rotatably supports a front end portion of the movable cushion portion to the seat cushion portion in order to flip up forward.
The vehicle seat is characterized in that the movable back portion has an upper end rotatably supported by the seat back so as to be flipped upward and forward. 5. The vehicle seat according to claim 2, wherein the movable cushion portion is supported by the seat cushion so as to be slidable forward, and the movable back portion is an upper end portion for flipping forward and upward. A vehicle seat in which a seat is rotatably supported on the seat back. 6. The vehicle seat according to claim 2, wherein the movable cushion portion is integrally and interlockingly connected to a lower end of the movable back portion, and the movable back portion is flipped forward and upward. A vehicle seat having an upper end rotatably supported by the seat back. 7. The vehicle seat according to claim 4, wherein a movable cushion portion flip-up mechanism for flipping up the movable cushion portion is provided, and a movable back portion flip-up mechanism for flipping up the movable back portion is provided. A vehicle seat characterized by. 8. The vehicle seat according to claim 7, further comprising a ranking mechanism that operates the movable cushion portion flip-up mechanism after the movable back portion flip-up mechanism operates. Sheet. 9. The vehicle seat according to claim 7, wherein an operating mechanism for operating the operations of the movable cushion portion and the movable back portion is provided, and the operating mechanism is provided on an upper end of the seat back body. A vehicle seat, which is incorporated in a support mechanism for a headrest, and uses at least one of a vertical movement operation and a forward leaning operation of the headrest as an operation force. 10. The vehicle seat according to claim 7, wherein the movable back portion flip-up mechanism urges the movable back portion toward a forward flip-up position, and the movable spring. A vehicle seat comprising: a locking unit that locks the back portion at a position where the back hollow portion of the seat back is filled. 11. The vehicle seat according to claim 7, wherein the movable cushion portion flip-up mechanism biases the movable cushion portion toward a forward flip-up position. And a lock means for locking the movable cushion portion at a position for closing the cushion hollow portion of the seat cushion. 12. The vehicle seat according to claim 7, wherein rear seat occupant movement detecting means for detecting forward movement of the seated occupant in the rear seat, and the movable back portion bounce according to the output of the detecting means. A vehicle seat having control means for operating a raising mechanism and a movable cushion part flip-up mechanism. 13. The vehicle seat according to claim 12, wherein an electric seat that moves the seat in the front-rear direction is provided as the rear seat, and the slide amount detecting means of the electric seat detects the rear seat occupant movement. A vehicle seat characterized by being used as means. 14. The vehicle seat according to claim 12, wherein the rear seat occupant movement detection means is a load sensor disposed in a rear seat cushion, and the occupant of the occupant receives the load sensor according to an output of the load sensor. A vehicle seat, comprising: a center-of-gravity movement estimation unit that estimates movement of the center of gravity.