JP2003220865A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding vehicle seat which can be folded and housed smoothly without making a seat cushion interfere with the body. <P>SOLUTION: According to the vehicle seat, when a seat back 1a is folded forward, the seat cushion 1b is moved to the rear to be housed and the back of the seat back 1a is folded continuously with a rear deck 21 to form a cargo floor. The lower part of the seat back 1a is supported on the body 22 in a swingable manner via a hinge bracket 4. The front part of the seat cushion 1b is supported on the body 22 in a swingable manner via a first link 3a, and the rear part of the seat cushion is pivotally attached to the lower part of the seat back 1a. The pivotally attached part is engaged with an arcuate guide hole formed on the rear part of the seat cushion 1b, and is linked to the front end of the first link 3a via a second link 3b, so that the pivotally attached part is made to move along the guide hole. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable vehicle seat in which a seat cushion can be smoothly folded and stored without interfering with a body.

[0002]

2. Description of the Related Art Recently, along with the development of outdoor sports such as fishing and camping, wagon-type and one-box-type automobiles have been widely used instead of conventional sedan-type automobiles. Further, in these automobiles, it has been proposed that the seat can be deformed into various shapes so that a large load can be placed thereon. For example, as shown in FIG. 5, the seat back 30a is replaced by the seat cushion 30b. When the seat cushion 30b is moved forward toward the seat surface, the seat cushion 30b moves rearward and the seat back 30a is folded on the seat cushion 30b, so that the back surface of the seat back 30a is the rear deck 3.
The one with the cargo floor surface following No. 1 has been put into practical use.

However, the conventional one is a mechanism in which the seat back 30a rotates around a support pin 33a at the tip of a support member 33 which is erected on the body 32, and the pin 34 is provided in front of the lower end of the seat back 30a. The rear portion of the seat cushion 30b pivotally supported is the support pin 3
Due to the circular arc movement around 3a, as shown in FIG. 5 (b), the rear lower surface of the seat cushion 30b hits the body 32. As a result,
In order to avoid this, the thickness of the cushion has to be reduced, and there is a problem that the cushioning property is significantly impaired. Furthermore, as shown in FIG.
It is necessary to secure a large space in the front part of the seat because the seat back 30a largely pops out to the front side after the seat is tilted forward, and when designing the seat, various restrictions are imposed due to the size of the seat, the mounting position, and the like. There were also problems.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and allows the seat cushion to be sufficiently folded and stored without interfering with the body even if the seat cushion has a sufficient thickness, and can be moved forward. It is possible to provide a foldable vehicle seat that can be folded and stored compactly without the seat back popping out to the front side even afterward and can exhibit both excellent cushioning property and storability. It was completed for the purpose.

[0005]

In the vehicle seat of the present invention made to solve the above problems, when the seat back is turned forward toward the seating surface of the seat cushion, the seat cushion moves rearward and the seat is seated. In a vehicle seat in which the back is folded over and the back side of the seat back is a cargo floor surface continuing to the rear deck, a lower portion of the seat back is rotatably supported by a body via a hinge bracket, and a seat cushion is also provided. The front portion of the vehicle is rotatably supported by the body by the first link, and the rear portion is pivotally attached to the lower portion of the seat back, and the pivotal attachment portion is engaged with an arcuate guide hole formed in the rear portion of the seat cushion. In addition, by connecting the pivotally attached portion and the tip end portion of the first link by the second link, and moving the pivotally attached portion along the guide hole, Rear portion of the seat cushion is characterized in that it has to move while drawing a trajectory substantially horizontal after gradually decreasing toward the rear side by the accelerated seat back.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a seat body including a seat back 1a and a seat cushion 1b. When the seat back 1a is tilted forward toward the seat surface of the seat cushion 1b, the seat cushion 1b moves rearward and the seat back 1a It is a foldable type in which the back side of the seat back 1a is folded up to be a cargo floor surface continuing to the rear deck 21.

The lower portion of the seat back 1a is provided with a hinge bracket 4 and a body 2 centered around a pivotally attached portion 11a.
It is supported so as to be rotatable with respect to 2. on the other hand,
The front portion of the seat cushion 1b is rotatably supported by the body 22 by the first link 3a. 1
Reference numeral 1c is a pivotal attachment portion between the first link 3a and the body 22, and 11d is a pivotal attachment portion between the first link 3a and the seat cushion 1b. The rear portion of the seat cushion 1b is connected to the lower portion of the seat back with an L-shaped connecting member 2. The connecting member 2 is fixed on the seat back side, and is rotatably pivoted on the seat cushion side by a pin or the like. The first link 3a is bent in a U shape so as to straddle the cross member 22a for body strength maintenance formed on the body 22.
It is configured to freely rotate without interfering with a.

Further, an arcuate guide hole 5 is formed in the rear portion of the seat cushion 1b, and the pivotal attachment portion 11b of the connecting member 2 is engaged with the arcuate guide hole 5 and the pivotal guide hole 5b is formed. The attachment portion 11b and the tip end portion of the first link 3a are connected by the second link 3b with the pivot attachment portion 11e. More specifically, the pivot portion 1
1d is located on the front side of the extension of the pivotally-attached portion 11c and the pivotally-attached portion 11e, and the seat cushion 1b is provided at the pivotally-attached portion 1b.
It is rotatably supported by a link mechanism having three pivot points, 1b, a pivot point 11d, and a pivot point 11c. On the other hand, in addition to the link mechanism, there are four pivotal attachment portions 11a, 11b, 11e, and 11c, and the pivotal portion 11b has an arc-shaped guide hole 5a. A link mechanism guided by the above is formed, and the combination of these two link mechanisms prevents the turning locus of the rear portion of the seat cushion 1b from being largely depressed downward. Further, in the present invention, the pivotally connecting portion 11b of the connecting member 2 is
Is moved along the guide hole 5, the rear portion of the seat cushion 1b is gradually lowered rearward by the forward tilting of the seat back 1a and then is moved while drawing a substantially horizontal trajectory, which is compact. I realized the storage.

As shown in FIG. 1, such a structure is usually used as a seat with a seating surface formed. On the other hand, when the seat back 1a is turned forward toward the seat surface of the seat cushion 1b. As shown in FIG. 3, as the seat cushion 1b moves rearward, the seat back 1a is folded on the seat cushion 1b, and the back surface of the seat back 1a forms a cargo floor surface continuing to the rear deck 21 to prevent a large load such as a large load. The point that it is used as a storage space is basically the same as that of a conventional folding seat of this type.

In the present invention, the seat back 1a
If you tilt the front toward the seat cushion 1b,
The L-shaped connecting member 2 rotates counterclockwise around the pivotally connecting portion 11a, and accordingly the pivotally connecting portion 11b rotates counterclockwise. The second link 3b is connected to the pivotally attached portion 11b, and the first link 3a is further connected to the other end of the second link 3b. Further, the pivotally attached portion 11b is in contact with the lower end edge of the arcuate guide hole 5 formed in the rear portion of the seat cushion 1b. As a result,
As shown in FIG. 5, the lower end edge of the arc-shaped guide hole 5 is pulled by the pivotal portion 11b up to a certain angle, so that the first link 3a rotates clockwise in conjunction with the forward tilting of the seat back 1a, and the seat cushion 1b will be pulled while gently descending to the rear side.

When the seat back 1a is further tilted forward, the pivotally-attached portion 11b of the connecting member 2 leaves the lower end edge of the arc-shaped guide hole 5 and is gradually moved upward relative to the arc-shaped guide hole 5 while being guided by the arc-shaped guide hole 5. Will be moved. As a result, the rear portion of the seat cushion 1b does not move in a circular motion of the pivotally attached portion 11b but moves in a substantially horizontal direction combined with the circular arc shape of the guide hole 5. That is, the seat cushion 1
As shown in FIG. 4, the rear part of b is not a simple arcuate movement, but is gradually moved to the rear side as shown by the curve A (see FIG. 1) and then moves while drawing a substantially horizontal trajectory. And the rear lower surface of the seat cushion 1b is the body 2
It will be completely stored in the predetermined position without hitting 2.

As a result, when the seat back 1a is tilted forward, the pivotally-attached portion 11b of the seat cushion 1b is moved to the position shown in FIG.
As indicated by a curved line A, the seat cushion 1b moves slowly while descending rearward while drawing a substantially horizontal orbit, which is not a simple circular arc motion as in the conventional art, and therefore the thickness of the seat cushion 1b is sufficiently thick. Even if it does, it becomes possible to avoid the rear part from interfering with the body 22.

As described above, the seat cushion 1b can be stored at a predetermined position only by the simple operation of tilting the seat back 1a toward the seat surface of the seat cushion 1b and avoiding the seat cushion 1b from hitting the body 22. It is possible to make the cushion thickness sufficiently thick because it moves so as to move. Further, since the center of rotation moves to the rear side when the seat back 1a is tilted forward, the end portion of the seat back 1a does not greatly protrude to the front side after folding, and a large space is secured on the front side. Since it is not necessary, the flexibility of seat design can be greatly increased.

[0014]

As is apparent from the above description, according to the present invention, even if the seat cushion has a sufficient thickness, it can be folded and stored smoothly without interfering with the body, and the seat back is in the front even after being tilted forward. It can be folded and stored compactly without popping out to the side, and exhibits both excellent cushioning and storage. Therefore, the present invention has an extremely great contribution to industrial development as a vehicle seat that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a front view showing a normal state of a seat.

FIG. 2 is a front view showing a state in which the sheet is being folded.

FIG. 3 is a front view showing a state in which the sheet is completely folded.

FIG. 4 is an explanatory diagram showing the movement of the seat cushion when the seat is folded.

FIG. 5 shows a conventional example, (a) is a front view showing a normal state, (b) is a front view showing a state in the middle of folding,
(C) is a front view showing a folded state.

[Explanation of symbols]

1 seat body 1a seat back 1b seat cushion 2 L-shaped connecting member 3a 1st link 3b Second link 4 bracket 5 guide holes 11a pivot part 11b pivot 11c pivot 11d pivot 11e Pivoting part 21 Rear deck 22 body 22a Cross member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keisuke Onoda             1 Takashima, 1 Maebata, Oshima Town, Toyota City, Aichi Prefecture             Within Yahe Industries Co., Ltd. (72) Inventor Makoto Ito             1 Takashima, 1 Maebata, Oshima Town, Toyota City, Aichi Prefecture             Within Yahe Industries Co., Ltd. (72) Inventor Satoshi Abe             3-10 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa             Within Japan Spring Co., Ltd. F term (reference) 3B087 CA10 CB13 CB15 DA07 DA09

Claims (3)

[Claims] 1. A vehicle in which, when the seat back is turned forward toward the seat surface of the seat cushion, the seat cushion moves rearward, the seat back is folded over the seat back, and the back surface of the seat back becomes a cargo floor surface continuing to the rear deck. In the vehicle seat, the lower part of the seat back is rotatably supported by the body via a hinge bracket, and the front part of the seat cushion is rotatably supported by the body by the first link and the rear part of the seat back is seated. The lower portion of the seat cushion, the engaging portion is engaged with an arcuate guide hole formed in the rear portion of the seat cushion, and the pivot portion and the tip end portion of the first link are connected by the second link. Then, by moving the pivot portion along the guide hole, the rear portion of the seat cushion is gently lowered rearward by tilting the seat back forward. The vehicle seat is characterized by moving while drawing a substantially horizontal track. 2. The seat cushion includes a pivotal attachment portion between the first link and the body, and a pivotal attachment portion located forward of an extension line of the pivotal attachment portion and the pivotal attachment portions of the first and second links. The vehicle seat according to claim 1, wherein the vehicle seat is rotatably supported by a link mechanism having three pivotal attachment portions, which are a second link and a pivotal attachment portion at a lower portion of the seat back. 3. The vehicle seat according to claim 1, wherein the first link is bent in a U shape so as to straddle a cross member formed on the body.