JPH0544282B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle seat, and particularly to a so-called swing seat in which a seat cushion moves forward as the seat back reclines. It is.

[Conventional technology]

2. Description of the Related Art In a seat of a vehicle, a seat back is configured to be tilted in the front-rear direction using a reclining device so that the seatback can be set to the desired tilt of the occupant.

However, when the seat back is tilted backwards, the lower end of the seat back protrudes above the rear of the seat cushion, creating a level difference between the lower end of the seat back and the seat cushion, making it difficult to sit for long periods of time. Conventionally, when the seatback is tilted backwards, the back is compressed, and the entire body is pushed forward by the lower end of the seatback, causing it to move forward, resulting in an unstable sitting posture and fatigue. A so-called swing seat in which the seat cushion moves forward has been proposed and implemented.

As this swing seat, conventionally "Unexamined Japanese Patent Publication No.
-59531 Publication''.
That is, in this seat, the seat cushion is disposed so as to be movable in the longitudinal direction relative to the base member, the seat back is rotatably pivoted to the base member, and the inclination can be adjusted using a reclining device. An arm is provided at the lower part of the cushion and extends downward from the shaft attachment part to the base member, and this arm is connected to the rear part of the cushion frame of the seat cushion. The rear part of the seat cushion is pushed out, thereby moving the seat cushion forward.

[Problem that the invention seeks to solve]

However, in this conventional seat, the seat back and seat cushion are connected, so when the seat back is tilted forward, the seat cushion moves rearward in conjunction with this. Therefore, improvements are desired for so-called walk-in seats used as front seats in two-door cars, where the seatbacks interfere with each other and the seatbacks cannot be folded forward sufficiently. was.

The present invention has been made in view of this point, and when the seat bag is tilted backward, the seat cushion moves forward in conjunction with this, but when the seat bag is tilted forward, the seat cushion is separated from the movement of the seat bag. To provide a seat in which the seat back can be tilted forward without interfering with the seat cushion.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a vehicle seat in which a seat back is pivotally attached to a base member and whose inclination can be adjusted by a reclining device, in which a seat cushion is arranged so as to be movable in the longitudinal direction with respect to the base member. However, a pressing member is provided on the seat back side, which engages with the seat cushion and transmits a forward moving force only when the seat bag is tilted backward.

[Effect]

The measures described above operate as follows.

When the seat back is tilted rearward from the neutral state by the reclining device, the pressing member engages with the seat cushion as a result of this tilting operation, so that the rearward tilting force becomes the force that moves the seat cushion forward. The seat cushion is then moved forward.

When the seat back is rotated forward from the state in which the seat cushion has been moved forward to return to its original neutral state, the pressing force of the pressing member is removed, and the seat cushion returns to its original front-rear position. Return.

Furthermore, when the seat bag is tilted forward while the seat bag is in its neutral state, the pressing member has no correlation with the seat cushion, and the seat cushion is held in a state separated from the movement of the seat bag. The seat back can be rotated forward, that is, folded forward, without any hindrance, and in this state, the entire seat can be moved forward by the slide rail, so that it functions as a walk-in seat.

〔Example〕

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

First, FIGS. 1 to 4 show a first embodiment, in which 1 indicates a vehicle seat to which the present invention is applied, 2 a seat cushion, and 3 a seat back. The inclination can be adjusted in the front and rear directions.

Reference numerals 5 and 5 denote slide rails as base members that are attached to the floor side, and brackets 6 and 6 are respectively fixed to the upper surface portions of the upper rails 5a and 5a of the slide rails 5 and 5 over approximately the entire length. , 6 are formed with protruding shaft supports 6a, 6a and 6b, 6b at the front and rear ends of the brackets 6, and a base portion of the reclining device 4 is provided on the outer surface side of the rear end shaft support 6b of one of the brackets 6. 4a is fixed with a bolt 7.

Front links 8, 8 are rotatably supported in the front and rear directions by shaft screws 9, 9 at one end, respectively, on front end shaft supports 6a, 6a of these two brackets 6, 6. The free ends of the links 8, 8 are pivoted to both side surfaces of the front end of the seat cushion 2 with shaft screws 10, 10, respectively, in a state in which they stand up diagonally rearward, and the free ends of the links 8, 8 are pivotally connected to both side surfaces of the front end of the seat cushion 2, respectively, by shaft screws 10, 10. Rear links 11, 11 are attached to the end shaft supports 6b, 6b.
is rotatably supported in the front and rear direction by shafts 12, 12 at one end, respectively, and this rear link 1
With the free ends of the seat cushions 1 and 11 facing vertically, axle pins 13 and 1 are attached to both side surfaces of the rear end of the seat cushion 2.
3, and by the rotation of these front links 8, 8 and rear links 11, 11, the seat cushion 2 can be moved in a swinging state in the front and rear direction with respect to the brackets 6, 6. being done.

Further, torsion coil springs 14, 14 are inserted between the front links 8, 8 and the front end shaft supports 6a, 6a of the brackets 6, 6, respectively, at the shaft supports of the front links 8, 8 with respect to the brackets 6, 6. This torsion coil spring 14, 14
Seat cushion 2 is always in the first position due to the biasing force of
It is designed to be set in the normal support position as shown in the figure.

Further, at one end of the rear links 11, 11 in the support mechanism for the seat cushion 2 constructed as described above, there are shafts 12, 12 of the rear links 11, 11, which are pivoted to the brackets 6, 6.
Discs 15, 15 are fixed to the outer surfaces of the rear end shaft supports 6b, 6b of the brackets 6, 6, and the peripheral edges of these discs 15, 15 have a required length,
That is, as will be described later, cutouts 16, 16 are formed with a length that is engaged when the seat bag 3 is tilted backward, and disengaged when the seat bag 3 is tilted forward.

and the rear end shaft support 6b of both brackets 6,6,
6b, the seat back 3 is coaxial with the rear links 11, 11, and the shaft pins 17,
17 so as to rotate independently of the rear links 11, 11. That is, in this example, the shafts 12, 12 of the rear links 11, 11 are formed of a tube material, and a through hole is formed in the center of the discs 15, 15 to communicate with the hollow part of the shaft, and the shaft pins 17, 17
are rotatably inserted into the hollow portions of the shafts 12, 12 through the through holes of the discs 15, 15, and are pivotally supported.

The hinge brackets 3a and 3b are provided with the above-mentioned discs 15 and 15 located at the upper part of the pivot support.
Pressing pins 18, 18 as pressing members are implanted corresponding to the notches 16, 16, and the notches 16, 1 are moved by rotation of the hinge brackets 3a, 3b.
Moved within 6.

The movable arm 4b of the reclining device 4 is fixed by a bolt 19 to one side of the seat bag 3 which is pivotally supported by the brackets 6, 6 in this manner.

Next, the operation of this example seat configured as described above will be explained.

Now, when seat back 3 is in the neutral position,
Pressing pins 18, 1 of hinge brackets 3a, 3b
8 engages with the rear end edges 16a, 16a of the notches 16, 16 of the discs 15, 15, and the rear links 11, 11
is oriented substantially vertically, and the seat cushion 2 is in its normal retracted state (see FIG. 1).

When the reclining device 4 is operated to tilt the seat back 3 rearward from this state, the pressing pins 18, 18 of the hinge brackets 3a, 3b are pressed against the rear end edges 16 of the notches 16, 16 of the discs 15, 15.
a, 16a, and as a result, the rear links 11, 11 are rotated forward together with the discs 15, 15 about their pivots, and the seat cushion 2 is pushed forward, and the front part Link 8,8
is rotated against the biasing force of the torsion coil springs 14, 14, and the seat cushion 2 moves forward (see FIG. 3).

Conversely, when the seat bag 3 is raised from the rearward tilted position and returned to the neutral position, the press pin 1
8 and 18 are separated from the rear end edges 16a and 16a of the notches 16 and 16 of the discs 15 and 15, and the pressure on the discs 15 and 15 is released, so the seat cushion 2 is moved away from the front link 8. , 8 are rotated back by the biasing force of the torsion coil springs 14, 14, so that they are moved rearward and returned to the normal state shown in FIG.

When the seat back 3 is tilted forward from this normal state, the pressing pins 18, 18 of the hinge brackets 3a, 3b are pushed into the notches 1 of the discs 15, 15.
The disks 15, 16 are separated from the rear edges 16a, 16a and moved inside the notches 16, 16 from the rear end to the front end. Since the rear link 11 is not rotated at all, the seat cushion 2
is held in its normal retracted state, and the seat bag 3 can be moved forward significantly without the seat cushion 2 being a hindrance (see FIG. 4).

In this way, in the seat of this example, when the seatback 3 is tilted backward, the press pins 18, 18 engage with the rear links 11, 11 and rotate them, so the seat cushion 2 is in a state where the seatback 3 is tilted backwards.
Even when the seat back 3 is returned to its original position, the seat back 3 can be moved forward in conjunction with the rear link 11, so that the seating surface can be maintained in the normal state or better.
11, that is, the notch 1 of the discs 15, 15
spaced apart from the rear edges 16a, 16a of 6, 16;
Since the seat cushion 2 is configured to be held in a state separated from the movement of the seat back 3, there is no interference between the seat back 3 and the seat cushion 2, and the forward movement of the seat back 3 is performed extremely smoothly. It will be. In addition, in this state, move the entire seat 1 to the slide rail 5,
5, it can be moved forward and has the function of a walk-in seat.

In addition, the seat of this example configured as above is
Notches 16, 16 are integrally formed with the rear links 11, 11.
The rear links 11, 11 are rotated together by pressing the edges of the notches 16, 16 with pressing pins 18, 18 provided on the side of the seat back 3. so as to move the seat cushion 2 forward,
Seat cushion 2 changes the backward tilting movement of seat back 3.
However, according to a second embodiment of the present invention, a seat configured to transmit the backward tilting motion of the seat back 3 directly to the rear links 11, 11 is provided. As an example, FIGS. 5 to 8 will be explained.

That is, in this seat 21, the lower ends of both hinge brackets 3a, 3b of the seat bag 3 are bent and extended further downward from the center of rotation thereof to form an extension part 23.
a, 23b, and these extensions 23a, 23b
Pressing pins 28, 2 as pressing members are provided at the tips of the rear links 11, 11 so as to correspond to the rear edges of the rear links 11, 11.
It is constructed by planting 8. It should be noted that other members are constructed in the same manner as in the first embodiment described above, so the same reference numerals are given and explanations thereof will be omitted.

As shown in FIGS. 7 and 8, the operation of the seat 21 is almost the same as in the first embodiment described above, but the rear links 11, 11 are directly pressed by the pressing pins 28, 28. Since the seat cushion 2 is rotated by the user, the seat cushion 2 can be moved forward more smoothly.

Further, the seat 31 shown in FIG. 9 is a modification of the second embodiment described above, in which only one hinge bracket 3a is bent and extended downward in the same manner as in the second embodiment to form an extension portion 33. The other hinge bracket 3b
An extension part 33 of one hinge bracket 3a is not formed, but an arm 34 is connected and rotated integrally so as to have a symmetrical shape with one hinge bracket 3a. and rear links 11, 11 at the ends of the arm 34 and the end of the arm 34, respectively.
Pressing pins 38, 38 as pressing members corresponding to
It was constructed by planting. In this example, the outer end of the shaft 32 that pivotally supports the other rear link 11 on the bracket 6b' is formed into a square shape and engages with a square shaft hole formed in the other hinge bracket 3b. An arm 34 is connected to the shaft 32 by a bolt, and an arm 34 is attached to the inner end of the shaft 32.
By fixing the arm 34 so as to correspond to the extension part 33 of one hinge bracket 3a, the hinge bracket 3b and the arm 34 can be rotated together, whereas the rear link 11 can be freely rotated. ing.

In the above embodiment, the links 8 and 8 are used as movable support members for the front and rear portions of the seat cushion 2.
and 11, 11 are used, but instead of this, for example, the upper rail 5 of the slide rails 5, 5 is used.
A guide bracket having a long hole that slopes high forward is fixed to the front and rear of parts a and 5a, and an engaging pin is provided on the seat cushion 2 side, and this engaging pin is moved to the long hole of the guide bracket. Pressing pins 18, 18 or 28, 2 as pressing members protruding from the hinge brackets 3a, 3b of the seat back 3 employing a front and rear sliding mechanism that freely engages with each other.
8, 38, and 38 may be brought into direct contact with the rear end surface of the seat cushion 2, and the seat cushion 2 may be pushed forward and pushed out as the seat bag 3 tilts backward.

Furthermore, it goes without saying that the embodiments do not specify the present invention in other configurations, and various changes and changes are possible.

〔Effect of the invention〕

As described above, according to the present invention, when the seat back is tilted backward, the seat cushion is moved forward in conjunction with this, so that the seating surface can be secured in the normal state or more, and when the seat back is tilted forward, the seat cushion is moved forward. Since the cushion is held in a state separated from the movement of the seatback, the seatback can be folded forward smoothly.Especially when applied to the front seat of a two-door car, it is possible to move the seatback forward. It is easy to get on and off the vehicle, and it has great practical effects as a walk-in seat for two-door cars.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted side view showing a first embodiment of the vehicle seat of the present invention, FIG. 2 is a partially cutaway perspective view of the same, and FIGS. 3 and 4 are views of the same seat. An explanatory view of the operation; FIG. 5 is a partially omitted side view showing a second embodiment of the seat of the present invention; FIG. 6 is an exploded perspective view of the same, partially cut away; FIGS. 7 and 8. 9 is an explanatory diagram of the operation of the same seat, and FIG. 9 is an exploded perspective view showing a modification of the second embodiment of the present invention shown in FIGS. 5 to 8. In the figure, 2 is a seat cushion, 3 is a seat back, 4 is a reclining device, 5, 5 is a slide rail as a base member, 6, 6 is a bracket, 8, 8 is a front link, 11, 11 is a rear link, 18, 18, 28, 28, 38, 38 are pressing pins as pressing members.

Claims (1)

[Claims] 1. In a vehicle seat in which a seat back is pivotally attached to a base member and the inclination can be adjusted by a reclining device, a seat cushion is arranged so as to be movable in the front and rear direction with respect to the base member, and the seat back is tilted backwardly on the side of the seat back. A vehicle seat characterized in that a pressing member is provided which engages the seat cushion only occasionally to transmit a forward moving force.