JPH11103964A - Vehicle seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the relax feeling of a sitting person by surely preventing his 'forward deviating phenomenon'. SOLUTION: A seat cushion 2 is provided with the front and rear bi-secting structure of a front side cushion 3 and a rear side cushion 4 and the rear end part of the front side cushion 3 is connected to the front end part of the rear side cushion 4 with a hinge 23 so as to be freely bending possible in a vertical direction. An interlocking means Y is equipped, by which the operation of the seat cushion 2 is interlocked with the operation of a seat back 5 so as to permit the front side cushion 3 and the rear side cushion to be bent downward in accordance with the operation of the seat back 5 in a rear inclination direction. A locking means X is equipped, by which the attitude of the seat back 5 is kept in an optional inclining attitute and also the operation of the interlocking means Y is locked in accordance with the holding of the seat back 5 attitude so as to keep the seat cushion 2 by the attitude of that point of time.

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, and more particularly to a train seat device.

[0002]

2. Description of the Related Art In a vehicle seat, generally, a seat back provided at a rear end side of a seat cushion can be tilted in the front-rear direction of the seat. If the driver wants to take a relaxed posture, the seat back is tilted to the rear side of the seat so that the user can sit in a supine position with his hips extended.

[0003]

However, in a conventional vehicle seat with a reclining mechanism, a desired tilting posture is obtained by tilting only the seatback while keeping the posture of the seat cushion fixed.
There is a problem that the utility (improvement of relaxation) cannot be sufficiently exhibited even though the seatback is tilted backward in an attempt to take a relaxed posture.

That is, for example, when the seat back is tilted backward from a normal sitting state, the bending angle between the seat back and the seat cushion is reduced, and the pressing load from above on the seat cushion is reduced, while the seat load is reduced. Since the load on the back increases and the applied direction of the load greatly deviates from the direction perpendicular to the seat back, a component force directed downward along the surface of the seat back is generated. As a result, a `` front shift phenomenon '' occurs in which the buttocks of the seated person seated with the seat back tilted rearward are shifted to the front side of the seat, and the seated person feels discomfort due to the occurrence of the `` front shift phenomenon '' Relaxation is impaired.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a vehicle seat device that reliably prevents a seated person from "forward displacement phenomenon" in a seated state in which the seat back is tilted rearward, thereby enhancing the sense of relaxation of the seated person. It was made for the purpose.

[0006]

According to the present invention, the following configuration is employed as specific means for solving the above-mentioned problems.

That is, in a vehicle seat device including a seat cushion and a seat back attached to a rear end side of the seat cushion so as to be tiltable in the front-rear direction of the seat,
The seat cushion has a front / rear two-part structure including a front cushion positioned closer to a front portion of the seat cushion and a rear cushion positioned closer to the rear, and a rear end portion of the front cushion and the rear portion approaching each other. The front end of the cushion is hingedly connected to the front end of the cushion via a hinge, and the seat is provided between the seat back and the seat cushion, and the seat back is moved in the backward tilting direction. Interlocking means for interlocking the operation of the seat cushion with the operation of the seat back so that the front cushion and the rear cushion of the cushion are bent downward at the hinge portion, and the posture of the seat back is maintained at an arbitrary tilting posture. The operation of the interlocking means is locked with the posture of the seat back and the seat is locked. Is characterized in that a locking means for holding a posture at the time the cushion.

[0008]

According to the present invention, the following effects can be obtained by adopting such a configuration. That is, according to the vehicle seat device of the present invention, the seat cushion has a front-rear two-part structure including a front cushion and a rear cushion, and a hinge is formed between the rear end of the front cushion and the front end of the rear cushion. The front cushion and the rear cushion are bent so as to bend downwardly at the hinge portion with the movement of the seat back in the backward tilt direction while being connected to bendable in the up and down direction through the seat back. Interlocking means for interlocking the seat back with the operation of the seat back, and holding the seat back in an arbitrary tilting posture, and locking the operation of the interlocking means with the holding of the seat back posture to move the seat cushion at that time. Lock means for holding the seat back in the posture of the seat back. Serial bent amount of downward between the front cushion and back cushion of the seat cushion is increased, the recess is generated in the boundary portion between the front cushion and the rear cushion of the seat cushion. The recess holds the buttocks corresponding to the buttocks of the occupant seated on the seat cushion, and prevents the displacement of the buttocks toward the front side of the seat, that is, the "forward displacement phenomenon". It works as follows. Therefore, even if a force is applied to the seated person in the direction of shifting the buttocks toward the front side of the seat by setting the seat back to the rearward tilting posture, the "front shift phenomenon" of the buttocks of the seated person is performed. Does not occur, and the seated person can stably obtain a relaxed posture in which the waist is extended. As a result, the seated occupant can obtain a better feeling of relaxation, and the improvement of the commercial value of the vehicle seat can be expected.

In this case, the bending of the seat cushion is automatically adjusted in conjunction with the operation of the seat back by the operation of the interlocking means. The operability is improved as compared with the case where it is necessary to perform the bending adjustment separately.

Further, the holding of the seat back in a predetermined tilting posture and the holding of the seat cushion in the bending posture corresponding to the tilting posture of the seat back are simultaneously performed by locking means. For this reason, the structure of the entire seat apparatus can be simplified by reducing the number of members, and the manufacturing cost can be reduced, as compared with the case where both of these postures are held by dedicated locking means, for example. It is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle seat device according to the present invention will be specifically described based on preferred embodiments shown in the accompanying drawings.

FIG. 1 shows a train seat apparatus Z according to an embodiment of the present invention. This seat device Z
A seat cushion 2 serving as a seating portion, which is attached to a footrest 1 fixed to the floor of a train via a turning mechanism (not shown) so as to be capable of turning, and a front-rear direction at a rear end side of the seat cushion 2 And a pair of left and right armrests 6, 6 disposed on the left and right sides of the seat cushion 2, respectively. In this embodiment, the seat back 5 is connected to the armrests 6,6.
Seat back pivot pins 47 provided on the inner surface of
The seat 47 supports the seat so as to be tiltable in the front-rear direction.

In this seat apparatus Z, the locked state of a turning lock mechanism (not shown) is released by depressing a pedal 7 provided on the leg base 1 or pressing an operation button 8 provided on the armrest 6. Then, the turning operation is permitted, and at the same time, the locking operation of the locking means X described later is released, and the seat back 5 is forcibly set to the forward inclined position, thereby facilitating the turning operation of the seat apparatus Z. It has become. Further, as will be described later, the seat back 5 releases the locked state of the locking means X independently of the turning operation of the seat device Z by pressing the operation button 8 to operate the seat back. 5 can be set arbitrarily and held.

In the seat device Z of this embodiment, as described later, the posture of the seat cushion 2 is automatically changed in conjunction with the tilting operation of the seat back 5, and the seat back 5 is moved rearward. In the state where the seating position is set to the inclined position, the shift of the buttocks of the seated person toward the front side of the seat, that is, the above-mentioned "front shift phenomenon" is reliably prevented, and the seated person can be given a good sense of relaxation. That is the biggest feature. Hereinafter, a specific structure for preventing such a “front shift phenomenon” will be described in detail with reference to FIGS.

FIG. 2 is a plan view showing a frame structure of the seat cushion 2. As shown in FIG. This seat cushion 2
The front cushion 3 is located near the front of the seat cushion 2 and the rear cushion 4 is located near the rear. The front cushion 3 and the rear cushion 4 are respectively divided into front and rear sides as described below. A frame 21 and a rear frame 22 are provided, and the front frame 21 and the rear frame 22 constitute the seat cushion frame 20 of the seat cushion 2. The seat cushion frame 20 is supported by a cushion support frame 10 described below, which is fixed to the footrest 1 via a turning mechanism (not shown).

The cushion support frame 10 is integrally formed of a rectangular frame, and a pair of left and right side frames arranged in the front-rear direction of the seat so as to be positioned on both sides in the width direction of the seat cushion 2. 11,12
A front girder 13 provided near the front of the seat cushion 2, a rear girder 14 provided near the rear, and a straddle between the front girder 13 and the rear girder 14. And a connecting girder 15 arranged in the front-rear direction.

The cushion support frame 10
The pair of left and right side frames 11 and 12 are
A shape member having a U-shaped cross section is bent into a substantially “F” shape,
The cushion support frame 10 is disposed on both left and right sides with its protruding side facing downward.

As shown in FIGS. 2 and 3, the front frame 21 is formed of a rectangular frame having a width smaller than the width of the cushion support frame 10 by a predetermined size. The cushion support frame 1 has a substantially central portion between the side portions 21c and 21d in the front-back direction of the seat.
By being pivotally supported by a cushion pivot shaft 41 arranged in the width direction of 0, the cushion pivot shaft 41 is vertically rotatable about the cushion pivot shaft 41.

As shown in FIGS. 2 and 3, the rear frame 22 is formed of a rectangular frame having a width smaller than the width of the cushion support frame 10 by a predetermined dimension. The left and right sides of the end portion 22b are pivotally supported on the rear girder 14 of the cushion support frame 10 by cushion pivot pins 42, 42, respectively, so that they can be vertically rotated around the cushion pivot pins 42, 42. It has been.

The rear end 2 of the front frame 21
1b and the front end 22a of the rear frame 22 are connected to a pair of hinge pins 2 of a pair of left and right hinges 23 arranged at a predetermined interval in the width direction of the seat cushion frame 20.
4 and 24, they are connected to bend freely in the vertical direction.

On the other hand, a connection shaft 35 is disposed substantially at the center of the cushion support frame 10 in the seat front-rear direction so as to straddle between the pair of side frames 11 and 12. Of the two axial ends of the connecting shaft 35, a link bracket 32 described below is provided at an end on the first side frame 11 side located on the right side of the seat, and a link bracket 32 on the second side frame 12 side located on the left side of the seat. A bracket 38 described below is attached to each end.

The link bracket 32 is formed by bending a plate material into a U-shape and extending both end portions thereof at a predetermined intersection angle with each other. The first bracket portion 32a and the second bracket portion 32b are provided. The link bracket 32 has a bent portion fixed to an end of the connection shaft 35, and a first bracket portion 32a is connected to one end of a link bar 31 described below via a connection pin 33.
The second bracket portion 32b is connected via a connecting pin 36 to a bracket 37 provided on the front end 22a of the rear frame 22. On the other hand, the bracket 38
Is formed of a straight plate material, one end of which is connected to the connection shaft 35, and the other end of which is connected to a bracket 37 provided on the front end 22a of the rear frame 22 via a connection pin 36. ing.

The link bar 31 is made of a straight plate having a predetermined length, and one end thereof is connected to the first bracket portion 32a of the link bracket 32 as described above.
The other end is connected via a connecting pin 34 to a bracket 45 fixed to the base end of the seat back 5. The connecting pin 34 is arranged at a position separated from the seat back pivot pin 47 by a predetermined dimension. Accordingly, when the seat back 5 tilts in the seat front-rear direction about the seat back pivot pin 47, the tilt displacement of the seat back 5 is changed via the link bar 31, the link bracket 32 and the bracket 38. The rear frame 22, and the hinges 23, 2
The front frame 21 and the rear frame 22 are respectively transmitted to the front frames 21 connected via the third frame 3, and the front frames 21 and the rear frames 22 are bent vertically in conjunction with the tilting operation of the seat back 5. Specifically, the front frame 21 and the rear frame 22 are linked so that the degree of bending increases as the amount of backward inclination of the seat back 5 increases. Therefore,
In this embodiment, the bracket 45, the link bar 31, and the bracket 38 constitute "interlocking means Y" in the claims.

On the other hand, between the base end of the seat back 5 and the front girder 13 of the cushion support frame 10,
A damper 25 described below is arranged. The damper 25 is formed of a gas-filled cylinder. One end 5a of the damper 25 is connected to the tip of a bracket 46 attached to the base end of the seat back 5, while the other end 25b, A bracket 27 is attached to the tip of the damper rod 26. The bracket 27 is connected to a bracket 28 provided on the front spar 13 via a connecting pin 54. Further, a valve operating portion 30 for closing the air chamber of the damper 25 or opening the air chamber to the atmosphere is provided at the tip of the damper rod 26 of the damper 25. The valve operating portion 30 is pivotally supported by the bracket 27 via a lever pivoting pin 57 and the distal end thereof is connected to a cable 55. The opening / closing operation is performed by the swinging lever 56 which is operated.

The cable 55 is connected to the pedal 7 and the operation button 8. The cable 55 is pulled when the pedal 7 is depressed and when the operation button 8 is depressed. The valve operating section 30 is opened via a lever 56.

Therefore, when the cable 55 is not pulled, the valve operating portion 30 is in the closed operation state, the effective shaft length of the damper 25 is fixed and held as it is, and the seat cushion frame 20 is extended.
The bent state of the front frame 21 and the rear frame 22 is maintained as it is. On the other hand, when the cable 55 is pulled and the valve operating portion 30 is opened, the damper 25 is extended by the pressure of the sealed gas, and the seat back 5 is moved around the seat back pivot pin 47. It acts so as to tilt forward, and allows the seatback 5 to be tilted backward by external force. In this embodiment, the damper 25 corresponds to "lock means X" in the claims.

In this embodiment, FIG.
As shown in the figure, in the upright posture in which the seat back 5 is substantially upright, the front frame 21 and the rear frame 22 of the seat cushion frame 20 extend substantially linearly, and the surface of the front cushion 3 and the rear side The relative position and relative size between the components of the interlocking means Y are set so that the surface of the cushion 4 smoothly and continuously forms the seat cushion 2.

Next, a description will be given of the use state and operation method of the seat apparatus Z configured as described above. In the normal sitting state, as shown in FIG. 3, the seat back 5 is set in the standing posture. In this state, the front cushion 3 and the rear cushion 4 of the seat cushion 2 are both substantially horizontal, and the surfaces thereof are smoothly continuous. The standing posture of the seat back 5 and the horizontal extension state of the seat cushion 2 are held by the damper 25. Therefore, the seated person can take a normal sitting posture by sitting on the seat cushion 2 and depositing his / her back on the seat back 5.

On the other hand, when the occupant wants to take a relaxed sitting posture in the normal sitting posture, the occupant pushes the operation button 8 provided on the armrest 6 to operate. Then, the operation of the operation button 8 causes the valve operation section 30 to open, and the locked state by the damper 25 is released. Accordingly, the seated person can push the seat back 5 by hand or backward while sitting on the seat back 5 to actuate the seat back 5 to a desired backward tilt position, and interlock with the backward tilt operation of the seat back 5. As a result, the interlocking means Y is operated, and the boundary between the front frame 21 and the rear frame 22 of the seat cushion 2 is bent downward by a size corresponding to the amount of backward inclination of the seat back 5. Then, the seated person releases the pushing operation of the operation button 8 at the time when the seat back 5 is tilted backward to the desired backward tilt position. Then, the valve operation unit 30 is closed, the expansion and contraction of the damper 25 is regulated, the seat back 5 is held in the current tilted posture, and the seat cushion 2 is also held in the current bent posture. Will be retained.

When the adjustment operation is completed, the seat cushion 2 assumes a bent position corresponding to the tilting position of the seat back 5, and a recess is formed at the boundary between the front frame 21 and the rear frame 22. The buttocks of the seated person are held in the recesses. Therefore, the occupant
Even if the seat back 5 is seated with the seat back 5 tilted backward, the butt portion of the seat back is deflected to the front of the seat. Will be prevented. As a result,
The seated person can stably take a relaxed posture in which the waist is extended, and can obtain a better feeling of relaxation.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a frame structure of a seat cushion in the seat device shown in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a state change diagram of FIG. 3;

[Explanation of symbols]

1 is a leg stand, 2 is a seat cushion, 3 is a front cushion, 4 is a rear cushion, 5 is a seat back, 6 is an armrest, 7 is a pedal, 8 is an operation button, 10 is a cushion support frame, and 11 is a first side. Frame, 12 a second side frame, 13 a front spar, 14 a rear spar, 1
5 is a connecting girder, 20 is a seat cushion frame, 21 is a front frame, 22 is a rear frame, 23 is a hinge, 2
4 is a hinge pin, 25 is a damper, 26 is a damper rod, 27 to 28 are brackets, 30 is a valve operating unit, 3
1 is a link bar, 32 is a link bracket, 33 is a connecting pin, 34 is a connecting pin, 35 is a connecting shaft, 36 is a connecting pin, 37 and 38 are brackets, 41 is a cushion pivot shaft, 42 is a cushion pivot pin, 45 and 46 are brackets, 47 is a seat back pivot pin, 51 to 53 are armrest fixing bolts, 54 is a connecting pin, 55 is a cable, 56 is a swing lever, 57 is a lever pivot pin, X is a lock means, and Y is a locking means. Is an interlocking means, and Z is a seat device.

Claims (1)

[Claims] 1. A vehicle seat device comprising: a seat cushion; and a seat back attached to a rear end side of the seat cushion so as to be tiltable in a front-rear direction of the seat, wherein the seat cushion is closer to a front portion of the seat cushion. The front cushion and the rear cushion positioned closer to the rear have a front-rear two-part structure, and the rear end of the front cushion and the front end of the rear cushion approaching each other are connected via a hinge. The front cushion and the rear cushion of the seat cushion are provided between the seat back and the seat cushion while being connected to be able to bend in the up-and-down direction. The operation of the seat cushion is linked to the operation of the seat back so as to bend downward at the hinge portion. Interlocking means for locking the seat back in an arbitrary tilting posture, and locking means for locking the operation of the interlocking means in conjunction with holding the posture of the seat back and holding the seat cushion in the current posture. A vehicle seat device comprising: