JP2002293179A - 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).

The seat cushion in this type of folding seat is rotatably supported by 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. Have been.

[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 vehicle folding seat consisting of a seat cushion that can be flipped up all around the front part and a seat back that can be tilted forward all around the lower part, and a lower bracket fixed to the floor and a front of the seat cushion Rotating shafts at both ends of the intermediate link are respectively supported by upper brackets fixed to the lower surface, and pins are protruded from the lower bracket to engage the pins with the upper bracket.
A V-shaped groove is formed, and the V-shaped groove is formed by connecting both arc-shaped grooves around the respective rotation axes at both ends of the intermediate link.

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, it is not necessary to remove the headrest before moving the seat back forward, and the operation is easy.

According to the second 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 second 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.

[0010]

1 to 7 show 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. The lower end of each upper bracket 7 is divided into right and left, and the lower bracket 9 having an upward U-shape is sandwiched therebetween.

A pair of left and right intermediate links 10 are provided further inside the lower bracket 9, and a first rotation shaft 10a and a second rotation shaft 10b at both ends of the intermediate link 10 are respectively connected to the lower bracket 9 and the upper bracket. 7.

A pin 11 projects from the outer surface of the lower bracket 9, and the pin 1 is attached to the upper bracket 7.
A V-shaped groove 12 is formed in which the groove 1 engages. The V-shaped groove 12 is formed by joining a first arc groove 12a centered on the first rotation axis 10a of the intermediate link 10 and a second arc groove 12b centered on the second rotation axis 10b. It is.

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 about the first rotation shaft 10a, and the pin 11 is connected to the other end of the first arc groove 12a (the second arc groove 1).
2b). At this time, since the pin 11 is guided along the first arc groove 12a, the upper bracket 7 cannot rotate around the second rotation shaft 10b.

When the pin 11 abuts on the other end of the first circular groove 12a, the pin 11 cannot rotate about the first rotating shaft 10a, and the upper bracket 7 rotates about the second rotating shaft 10b. The pin 11 is in the second circular groove 12
Move in b. When the pin 11 reaches the other end of the second arc groove 12b, the upper bracket 7 further rotates forward,
The seat cushion 2 is in a vertical flip-up state in which the front end is in contact with the floor 8. This flip-up state is stable because the front end of the seat cushion 2 is in contact with the floor 8.

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 the opposite direction to the case of flipping up. However, as described above, in the structure according to this embodiment, the seat cushion 2 is rotated by two first rotating shafts. 10a and the second rotating shaft 10b, while rotating the first rotating shaft 10a and the second rotating shaft 10b.
Since the rotation shaft 10b does not rotate at the same time and there is only one rotation trajectory, when the seat cushion 2 is returned to the original position, the lock 13 and the striker 14 of the seat cushion 2 always match and become engaged. Become.

[0020]

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.

[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 perspective view showing a hinge structure of the seat cushion of FIG. 3;

FIG. 5 is a side view showing the hinge structure in the seated state shown in FIG. 1;

FIG. 6 is a side view showing the hinge structure in the state of being flipped up shown in FIG. 2;

FIG. 7 is a side view showing the hinge structure in a flipped-up state shown in FIG. 3;

[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 axis 10b 2nd axis 11 Pin 12 V-shaped groove 12a 1st circular groove 12b 2nd circular groove 13 Lock 14 STRIKER R Luggage Room

Claims (2)

[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. The upper bracket fixed to the lower surface of the front part of the seat cushion supports the rotating shafts at both ends of the intermediate link, and the V-shaped groove is formed by projecting pins to the lower bracket and engaging the pins with the upper bracket. Wherein the V-shaped groove is formed by connecting both arc-shaped grooves centered on the respective rotation shafts at both ends of the intermediate link. 2. The folding seat according to claim 1, wherein the front end of the seat cushion abuts on the floor when the seat cushion is flipped up.