JP2002293178A - Folding seat of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular folding seat that dispenses with preliminary disengagement of a headrest from a seat back. SOLUTION: An upper bracket 7 turns on two pivots 10a and 10b at opposite ends of intermediate links 10, so that a forward movement of a seat cushion 2 in a raised state is increased to keep the headrest 6 from interference with the undersurface of the raised seat cushion 2 even if the seat back 3 is folded forward with the headrest 6 kept mounted on the top.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding seat for a vehicle.

[0002]

2. Description of the Related Art Generally, in order to widely use a luggage room, a seat for a vehicle generally includes a seat cushion that can be flipped up and down around a front portion, and a seat back that can be tilted up and down around a lower portion. There is one that can be folded freely. The luggage can be placed on the back of the seat back that has been moved forward and leveled, and the seat cushion that has been flipped up vertically becomes a new front wall of the enlarged luggage room (Japanese Patent Laid-Open No. 7-164940 as a similar technique). reference).

[0003] The seat cushion in this type of folding seat is rotatable with a hinge structure in which an upper bracket fixed to the lower surface of the front portion of the seat cushion and a lower bracket fixed to the floor are connected by a single rotating shaft. Supported.

[0004]

However, in such a conventional technique, the seat cushion can be freely raised around only one rotation shaft connecting the upper bracket and the lower bracket. In addition, the amount of forward movement of the seat cushion at the time of flipping up is small, and there is a possibility that a headrest provided at the top of the seat back that has been moved forward may interfere with the back surface of the seat cushion that has flipped up. Therefore, an operation such as removing the headrest from the seat back before the seat back is moved forward is required, and the operation is troublesome.

The present invention has been made by paying attention to such a conventional technique, and it is an object of the present invention to provide a folding seat for a vehicle which does not require a headrest to be removed from a seat back in advance.

[0006]

According to the first aspect of the present invention,
A folding seat for a vehicle comprising a seat cushion that can be flipped up entirely around a front portion and a seat back that can be fully tilted down around a lower portion, wherein a lower bracket fixed to the floor, The rotating shafts at both ends of the intermediate link are supported by the upper bracket fixed to the lower surface of the front part, and the frictional resistance of the rotating shafts at both ends of the intermediate link is made different.

According to the first aspect of the present invention, since the upper bracket rotates about the two rotation axes at both ends of the intermediate link, the amount of forward movement of the seat cushion at the time of flipping up is large, and the headrest is provided at the top. Even if the seat back is moved forward while it is attached, the headrest does not interfere with the back surface of the seat cushion that has been flipped up. Therefore, there is no need to remove the headrest before moving the seat back forward, and the operation is easy. In addition, since the frictional resistance of the rotating shafts at both ends of the intermediate link is different, the two rotating shafts do not rotate at the same time, and the seat cushion can be rotated in one trajectory, and the operability is good. .

According to the second aspect of the invention, the frictional resistance of the rotating shaft on the upper bracket side is made larger than that of the rotating shaft of the lower bracket.

According to the second aspect of the present invention, since the frictional resistance of the rotating shaft on the upper bracket side is larger than that of the lower bracket, when the seat cushion is flipped up, the seat cushion is first mounted on the lower bracket. , And then rotate about the upper bracket-side rotation axis.

According to a third aspect of the present invention, a stopper is provided between the upper bracket and the intermediate link to limit an angle between the upper bracket and the intermediate link from becoming smaller than a seating angle.

According to the third aspect of the invention, when the seat cushion is returned to the original seating state, the angle between the upper bracket and the intermediate link is maintained at the seating angle by the stopper, so that the seat cushion can be seated accurately. You can return to the state.

According to the fourth aspect of the present invention, the front end of the seat cushion comes into contact with the floor when the seat cushion is flipped up.

According to the fourth aspect of the present invention, the front end of the seat cushion comes into contact with the floor when the seat cushion is flipped up, so that the seat cushion is stably flipped up.

[0014]

1 to 6 are views showing an embodiment of the present invention. This embodiment relates to a third seat 1 in a third row in a wagon vehicle. The third seat 1 includes a seat cushion 2 and a seat back 3
The rear side is a luggage room R.

The seat back 3 is supported at its lower end by a rotating shaft 5 of a reclining device 4 and can be horizontally tilted forward around the rotating shaft 5. The horizontal state is maintained by a mechanism (not shown) of the reclining device 4. I can do it. A headrest 6 is provided on the top of the seat back 3.

Upper brackets 7 are fixed to the left and right sides of the front lower surface of the seat cushion 2, and lower brackets 9 are fixed to floors 8 corresponding to the upper brackets 7, respectively.

A pair of left and right intermediate links 10 are provided inside the lower bracket 9, and a first rotating shaft 10 a and a second rotating shaft 10 b at both ends of the intermediate link 10 are respectively connected to the lower bracket 9 and the upper bracket 7. It is pivotally supported. A stopper 11 is provided on the upper edge of the intermediate link 10, and the upper end of the stopper 11 is
To prevent the angle between the upper bracket 7 and the intermediate link 10 from becoming smaller than the seating angle θ. Further, a waveform washer W is sandwiched between the second rotating shaft 10b via the resin collar 12, and a predetermined frictional resistance is applied to the second rotating shaft 10b.

A lock 13 is provided on the rear lower surface of the seat cushion 2 and a striker 1 provided on the floor 8 is provided.
4 to fix the seat cushion 2 in a seated state.

To expand the luggage room R by folding such a third seat 1, first, the lock 13
Is released from the striker 14, and the rear part of the seat cushion 2 is lifted. Then, the upper bracket 7 and the intermediate link 10 rotate around the first rotation shaft 10a. Since the second rotating shaft 10b is provided with frictional resistance, it does not rotate at first.

When the front end of the seat cushion 2 comes into contact with the floor 8, the first rotating shaft 10a does not rotate any more, and then the seat cushion 2 is raised vertically about the second rotating shaft 10b. Rotate until. This flip-up state is stable because the front end of the seat cushion 2 is in contact with the floor 8. Further, the frictional resistance of the second rotating shaft 10b also prevents the seat cushion 2 from falling backward.

After the seat cushion 2 is flipped up, the seat back 3 is moved forward to make it horizontal. At this time, since the seat cushion 2 rotates about the two first rotation shafts 10a and the second rotation shafts 10b at both ends of the intermediate link, the amount of forward movement of the seat cushion 2 is large, and the headrest 6 is attached to the top. Even if the seat back 3 is moved forward with the head rest, the headrest 6 does not interfere with the back surface of the seat cushion 2 jumped up. Therefore, there is no need to remove the headrest 6 from the seat back 3 before the seat back 3 is moved forward, and the operation is easy.

When returning the seat cushion 2 to its original position,
After raising the seat back 3, the seat cushion 2 may be rotated in a direction opposite to the case of flipping up. However, as described above, in the structure according to this embodiment, the intermediate link 1 is rotated.
0, the stopper 11 is formed, and in the process of returning the seat cushion 2, the upper bracket 7 hits the stopper 11 and the angle between the upper bracket 7 and the intermediate link 10 becomes the seating angle θ, and the seat cushion 2
Is returned to the original position, the lock 13 of the seat cushion 2 and the striker 14 always match to be in the engaged state.

[0023]

According to the present invention, since the upper bracket rotates about the two rotation axes at both ends of the intermediate link, the amount of forward movement of the seat cushion when jumping up is large, and the headrest is attached to the top. Even if the seat back is moved forward, the headrest does not interfere with the back surface of the flipped-up seat cushion. Therefore, it is not necessary to remove the headrest before moving the seat back forward, and the operation is easy. In addition, since the frictional resistance of the rotating shafts at both ends of the intermediate link is different, the two rotating shafts do not rotate at the same time, and the seat cushion can be rotated in one trajectory, and the operability is good. .

[Brief description of the drawings]

FIG. 1 is a side view showing a seated state of a third seat according to an embodiment of the present invention.

FIG. 2 is a side view showing a state in which the third seat of FIG. 1 is being flipped up.

FIG. 3 is a side view showing a state in which the third seat of FIG. 1 is flipped up;

FIG. 4 is a side view showing the hinge structure in the state of being flipped up in FIG. 3;

FIG. 5 is a perspective view showing a hinge structure of the seat cushion of FIG. 4;

FIG. 6 is a sectional view taken along the line SA-SA shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Third seat 2 Seat cushion 3 Seat back 6 Headrest 7 Upper bracket 8 Floor 9 Lower bracket 10 Intermediate link 10a 1st rotation axis 10b 2nd rotation axis 11 Stopper 13 Lock 14 Striker R Luggage room W Wave washer θ Seating angle

Claims (4)

[Claims] 1. A folding seat for a vehicle comprising a seat cushion which can be flipped up entirely around a front portion, and a seat back which can be entirely tilted down around a lower portion, and a lower bracket fixed to the floor. , An upper bracket fixed to the lower surface of the front portion of the seat cushion,
A folding seat for a vehicle, wherein the rotary shafts at both ends of the intermediate link are supported, and frictional resistance of the rotary shafts at both ends of the intermediate link is made different. 2. The folding seat according to claim 1, wherein a frictional resistance of a rotation shaft of the upper bracket is larger than that of the rotation shaft of the lower bracket. 3. The folding seat for a vehicle according to claim 1, wherein a stopper is provided between the upper bracket and the intermediate link to limit an angle between the upper bracket and the intermediate link from becoming smaller than a seating angle. A folding seat for a vehicle, wherein the folding seat is provided. 4. The vehicle foldable seat according to claim 1, wherein a front end of the seat cushion abuts on a floor when the seat cushion is flipped up. For folding sheet.