JP2002079861A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of effectively preventing a forward slip of an occupant by restricting so as to press a hip part of the occupant backward, and directly regulating a forward movement of the hip part of the occupant generated at required time. SOLUTION: This vehicle seat prevents the forward slip of the seated occupant at required time. An air bag 13 inflating toward the rear side from the front side of the seat 1 by inflating gas delivered to the vehicle rear side, is housed in a seat part 3 of the seat 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat for preventing a occupant from slipping forward when required.

Here, the front slip is a phenomenon in which a lower body of an occupant moves forward when an impact or the like acts on a vehicle, and is usually called a submarine phenomenon.

[0003]

2. Description of the Related Art Conventionally, as a vehicle seat for preventing front slip of a seated occupant when required, there is a vehicle seat as disclosed in Japanese Patent Laid-Open No. 5-229378.

This vehicle seat has a seat body and an airbag device built in the seat body. This airbag device is arranged near the front end of the seat body and inflates the airbag upward.

[0005] Normally, the front slip phenomenon occurs when the vehicle is rapidly decelerated, an inertia force acts forward on the occupant, and the buttocks of the occupant slide forward on the seat.

However, in the conventional vehicle seat, when required, the airbag is inflated so as to project substantially perpendicularly to the back of the occupant's knee, and the airbag is moved forward by the inertial force. The back was restrained to prevent the occupants from slipping forward.

That is, in the conventional vehicle seat, the front slip of the occupant is regulated by the airbag that inflates on the back side of the occupant's knee after the occupant starts moving forward due to the inertia force generated. Therefore, there is a possibility that an impact force is given to the occupant.

In view of the above, the present invention constrains the occupant's buttocks so as to press it rearward, and directly restricts the occupants' buttocks from moving forward when necessary, thereby preventing the occupant from sliding forward. An object of the present invention is to provide a vehicle seat that can be effectively prevented.

[0009]

Means for Solving the Problems A seat for a vehicle, which prevents a seated occupant from slipping forward when required, is provided on a seat portion of the seat by an inflation gas discharged rearward of the vehicle. An airbag that inflates from the side toward the rear side is housed and configured.

[0010] The airbag is arranged so as to be flattened and accommodated in the seat so as to be substantially along the horizontal plane, and to allow the inflation gas to flow in from the front to the rear. It is desirable.

Further, the airbag may be configured to be cactus-folded and housed in a seat so that an end on the vehicle rear side approaches an end on the vehicle front side.

Still further, the seat includes a seat cushion and a support plate disposed below the seat cushion to support the seat cushion, and the airbag is housed between the seat cushion and the support plate. It is desirable that the configuration be such that:

[0013]

In the vehicle seat according to the present invention,
When the occupant's buttocks slide forward when required,
The airbag disposed in the seat inflates from the front side to the rear side of the seat, so that the front surface of the occupant's buttocks, that is, the back surface of the seated occupant's thigh is pressed backward. , The forward movement of the occupant's buttocks can be suppressed.

Therefore, in the vehicle seat of the present invention, the rear side of the airbag is restrained so as to press the rear surface of the thigh of the occupant backward by inflating the airbag toward the rear side, and the front of the occupant's buttocks generated when required. The movement of the occupant in front of the vehicle can be directly restricted, and the front slip of the occupant can be effectively prevented without applying an impact to the occupant when the movement is stopped.

Further, the airbag is deployed flat so as to be substantially along the horizontal plane and housed in the seat, and the inflating gas is
If the configuration is such that the airbag is caused to flow backward from the front side, before the inflation of the airbag, since the airbag is widely deployed and arranged in advance, the thickness is simply increased at the time of inflation. The inflation can be completed simply by inflating the airbag, and the inflation completed shape of the airbag can be easily ensured, so that the airbag can be reliably inflated from the front to the rear.

Further, if the airbag is configured to be cactus-folded so that the end on the vehicle rear side approaches the end on the vehicle front side and housed in the seat, the airbag is folded and housed. Therefore, the airbag itself can be made compact, so that the airbag can be easily assembled to the seat. Further, even when the airbag is deployed and inflated, since the airbag is folded and housed in a cactus fold that is easy to protrude, the airbag can easily protrude to the rear side of the vehicle, thereby restricting the occupant's buttocks from moving forward.

Still further, the seat portion includes a seat cushion, and a support plate disposed below the seat cushion and supporting the seat cushion, and the airbag is housed between the seat cushion and the support plate. Then, the airbag at the time of inflation can be smoothly inflated toward the rear side so as to be guided to the upper surface of the support plate. Also, not only the airbag itself,
Since the inflator for supplying the inflation gas to the airbag can also be fixed to the support plate, the airbag and the inflator can be stably supported by the support plate.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show a vehicle seat (hereinafter abbreviated as "seat") 1 according to an embodiment of the present invention. In the present embodiment, a front seat will be described as an example of the seat 1.

The seat 1 includes a backrest 2 and a seat 3. The seat 3 includes a seat cushion 5 and a support plate 8 (which is disposed below the seat cushion 5 and supports the seat cushion 5). Seat frame). The support plate 8 is disposed so as to extend substantially in the horizontal direction, and a mounting portion 9 that projects upward in a substantially inverted U-shaped cross section is formed near the front end of the support plate 8. In a rear wall portion 9a of the mounting portion 9, a mounting hole 9b through which a bolt 24 provided in an inflator body 22 described later can be inserted is formed. Further, below the support plate 8, a seat track 10 capable of adjusting the position of the seat 1 in the front-rear direction is provided. The seat cushion 5 includes a cushion body 6 formed of polyurethane or the like, and a skin 7 arranged to cover the surface of the cushion body 6. And between the cushion body 6 and the support plate 8 near the front side end,
The airbag device 11 is housed.

The airbag device 11 includes an airbag 13
And an inflator 21 for supplying an inflation gas to the airbag 13. The inflator 21 is disposed so as to be able to discharge the inflation gas to the rear side of the vehicle. The airbag 13 is placed on the upper surface of the support plate 8, sandwiched between the support plate 8 and the cushion body 6, and is flatly deployed toward the rear side of the vehicle and housed therein. The inflating gas flows from the front side of the seat 1 toward the rear side.

The airbag 13 is made of a flexible woven fabric such as polyester or polyamide, and as shown in FIG.
Two side edges 15 extending forward from each end of the
16 and a front edge 17 opposite to the rear edge 14 by connecting the ends of the two side edges 15 and 16 to each other, as a substantially rectangular plate having four edges, and a rectangular peripheral wall portion 18. 19 are formed in a bag shape in which the peripheral edges are connected to each other. And
The front edge 17 has a lead wire insertion hole 17a through which a lead wire 23 to be described later is inserted, and an inflator body 22.
Mounting holes 17b through which bolts 24 disposed in
Are formed respectively. In addition, the airbag 13
As shown in FIG. 2, the seat portion 3 is arranged in a flatly spread state over substantially the entire region in the left-right direction of the vehicle in the seat portion 3.

As shown in FIGS. 4 and 5, the inflator 21 includes an inflator body 22 and a diffuser 26.
And The inflator body 15 has a substantially cylindrical shape having a plurality of gas discharge ports 15 a on a peripheral surface thereof, and is disposed near the front edge 17 in the airbag 13 and substantially parallel to the left-right direction of the vehicle. The inflator body 22 has a lead wire 2 for receiving a gas generation signal.
3 is connected. The lead wire 23 is inserted through a lead wire insertion hole 17a formed in the front edge 17 of the airbag 13 and is connected to a connector (not shown) that conducts to the airbag operation circuit. Further, bolts 24 are welded to the inflator body 22 so as to project rightward and leftward in the radial direction.

The diffuser 26 is formed in a substantially cylindrical shape so as to cover the inflator body 22, and a plurality of gases arranged to be opened at the rear side of the vehicle so that the inflation gas flows out toward the rear side of the vehicle. It has a flow hole 26a. The inflator body 2 is located on the front side of the vehicle.
2 is formed with a mounting hole 26b through which the bolt 24 disposed therein can be inserted.

Then, each bolt 24 provided on the inflator main body 22 is inserted through a mounting hole 26 b formed in the diffuser 26, and the mounting hole 1 of the airbag 13 is formed.
7b, through a spring nut 28, through a mounting hole 9b formed in a rear wall 9a of the mounting portion 9 of the support plate 8, and a nut 29 is provided on the front side of the rear wall 9a.
By stopping, the inflator 21 is attached and fixed to the support plate 8 together with the airbag 13.

Next, the production of the sheet 1 of the embodiment will be described. First, the inflator 21 is assembled by disposing the inflator body 22 in the diffuser 26 such that the bolts 24 protrude from the mounting holes 26b. The inflator 21 is housed in the airbag 13 with each bolt 24 protruding, and the spring nut 28 is inserted through each bolt 24 to assemble the airbag device 11. At this time, the lead wire 23 for inputting the operation signal extending from the inflator main body 22 is inserted through the lead wire insertion hole 17a, and comes out of the airbag 13. Next, each bolt 24 is inserted through the mounting hole 9b formed in the rear wall 9a of the mounting portion 9 in the support plate 8, and the nut 29 is fixed to the front side of the rear wall 9a.
The airbag device 11 is mounted on the support plate 8. At this time, the airbag 13 is disposed on the upper surface of the support plate 8 such that the rear edge 14 of the airbag 13 is disposed rearward of the vehicle in a state where the airbag 13 is deployed flat. Then, the cushion body 6 is placed on the support plate 8,
The seat body 3 is formed by covering the cushion body 6 with the skin 7. The seat 1 of the embodiment is manufactured by attaching the backrest 2 to the seat 3 thus formed. Then, the completed seat 1 is mounted on a vehicle, and the terminals of the lead wires 23 are connected to a control circuit (not shown).

In the seat 1 of the embodiment, when a predetermined electric signal is input to the inflator main body 22 through the lead wire 23, each gas discharge port 2 of the inflator main body 22 is provided.
The expansion gas G is discharged from the diffuser 2a.
6 flows into the airbag 13 through the gas flow holes 26a. Then, the airbag 13 is inflated so as to press the cushion body 6 so as to protrude largely toward the vehicle rear side.

That is, in the sheet 1 of the embodiment, FIG.
As shown in the figure, the airbag 13 arranged in the seat 3
The seat 1 expands from the front side to the rear side, so that the front of the buttocks H of the occupant P, that is, the seated occupant P
The rear surface of the thigh T is restrained so as to be pressed rearward, so that the occupant P can be restrained from moving forward.

Therefore, in the seat 1 of the embodiment, the inflating of the airbag 13 to the rear side causes the thigh T
Of the occupant P is restrained so as to be pressed rearward to directly restrict the forward movement of the occupant H of the occupant P occurring at the time of need. Front slip can be effectively prevented.

In the embodiment, the airbag 13 is
It unfolds flat and is stored in the seat 3, and the inflation gas G is
The flow is made to flow from the front side to the rear side of the vehicle. For this reason, before the inflation of the airbag 13, since the airbag 13 is widely deployed and arranged in advance,
At the time of inflation, the inflation can be completed simply by increasing the thickness so that the inflated shape of the airbag 13 can be easily ensured. The inflation can be ensured to move from the side to the rear side.

Further, in the embodiment, the airbag device 1
1 is stored between the seat cushion 5 and the support plate 8, so that the airbag 13 when inflated is inflated.
Can be smoothly expanded toward the rear side so as to be guided to the upper surface of the support plate 8. Further, the airbag device 11 can be stably supported by the support plate 8.

Note that, as shown in FIG.
May be folded so that the rear edge 14 approaches the front edge 17 and housed in the seat 3. The air bag 13 is folded in such a manner that the rear edge 14 is
A cactus fold that is folded so as to be inserted in multiple stages on the 7 side is preferable. With such a configuration, the airbag 13
Can be folded and housed, so that the airbag 13 itself can be made compact and the assembly to the seat 3 (support plate 8) becomes easy. FIG.
When the inflation gas G flows in, the airbag 13 is easily protruded to the rear side of the vehicle even when the inflation gas G flows. Of the buttocks H can be restricted from moving forward. When the airbag 13 is folded and stored, as shown in FIG. 7, the airbag 13 is covered with a thin film 31 such as a heat-shrinkable film that can be broken in order to prevent the folded airbag 13 from collapsing. Is desirable.

In the embodiment, a front seat is used as an example of the seat 1. However, as shown in FIGS. 9 and 10, the present invention is applied to a plurality of seats used for a rear seat and the like (see FIG. 9). It is also applicable to a bench seat 34 for three persons. When used for such a bench seat 34, the inflator 36 covers the inflator main body 22 similar to the above-described embodiment and the inflator main body 22, which are arranged near the center in the left-right direction of the vehicle,
And a diffuser 37 that is arranged to extend to near the end in the left-right direction of the airbag 13. The gas flow holes 3 are provided near the left and right ends of the diffuser 37 and near the inflator body 22, respectively.
8 (three in the example shown). In this case, it is necessary to make the inner diameter of the gas flow holes 38B formed near the left and right ends larger than the inner diameter of the gas flow holes 38A formed near the inflator body 22. This is preferable because the use gas easily flows and the airbag 13 is evenly inflated. In addition, a flexible rectifying cloth may be disposed so as to cover the inflator body instead of the diffuser and guide the inflation gas, or to arrange the peripheral wall portion 1 of the airbag 13.
Put a plurality of tethers connecting the 8.19
The airbag 13 may be inflated evenly.

Further, when the present invention is applied to the bench seat 34, although not shown, a plurality of the inflators 21 of the above-described embodiment are arranged in accordance with the number of occupants sitting on the bench seat 34 (the bench seat in the illustrated example). In the case of (3), it may be configured to be arranged.

In the present invention, the inflator 21 is used as a supply unit for supplying the inflation gas to the airbag 13.
Although 36 is used, the inflation gas supply means is not limited to this. For example, an inflator is arranged below the seat, and the inflation gas discharged from the inflator is guided to form an airbag. A tube-shaped inflation gas supply path formed in communication with the opening of the gas may be used.

In the present invention, the airbag device 11
Is fixedly attached to an attachment portion 9 formed on the support plate 8, but without forming the attachment portion 9 on the support plate 8,
The airbag device 11 may be separately fixed to the support plate 8 using a bracket or the like. Further, the means for fixing the airbag device 11 to the support plate 8 is not limited to the bolt 24, and the airbag device 11 may be fixed to the support plate 8 by welding or the like. Furthermore, the support plate 8 may be formed from the floor panel itself, and the airbag device 11 may be attached and fixed to the floor panel.

As the seat frame to which the airbag device 11 is attached, a sheet-shaped support plate 8 (seat frame), a pipe-structured one or a resin plate may be used. However, in order to arrange the airbag 13 so as to smoothly guide the rearward inflation, it is desirable to arrange the seat frame in a plate shape.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the sheet of FIG.

FIG. 3 is a cross-sectional view of a seat portion taken along a line III-III in FIG. 2;

4 is a partially enlarged view showing the vicinity of the airbag device in FIG.

FIG. 5 is a plan view of an airbag used for the seat of FIG. 1;

FIG. 6 is a cross-sectional view showing a state where an airbag is inflated in the seat of FIG. 1;

FIG. 7 is a cross-sectional view showing a state in which the airbag is cactus-folded and stored in the seat of FIG.

FIG. 8 is a cross-sectional view showing a state where the airbag is inflated in FIG.

FIG. 9 is a plan view of a seat according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a seat portion taken along a line XX in FIG. 9;

[Explanation of symbols]

 1.34 Seat 3 Seat 5 Seat cushion 6 Cushion body 7 Skin 8 Support plate 11 Airbag device 13 Airbag 21/36 Inflator 22 Inflator body 22a Gas discharge port 26/37 Diffuser 26a / 38A / 38B Gas circulation hole

Claims (4)

[Claims] 1. A vehicle seat for preventing a seated occupant from sliding forward when required, wherein an inflation gas discharged to the rear of the vehicle is applied to a seat of the seat from a front side to a rear side of the seat. A vehicle seat, wherein an airbag inflating toward the seat is stored. 2. The airbag is deployed flat and substantially housed in the seat so as to substantially follow a horizontal plane, and the inflation gas is caused to flow in such a manner as to flow from a front side toward a rear side. The vehicle seat according to claim 1, wherein: 3. The airbag according to claim 1, wherein the airbag is cactus-folded and housed in the seat so that an end on a vehicle rear side approaches an end on a vehicle front side. The vehicle seat according to the above. 4. The seat according to claim 1, wherein the seat includes a seat cushion, and a support plate disposed below the seat cushion to support the seat cushion. The vehicle seat according to any one of claims 1 to 3, wherein the vehicle seat is housed between the vehicle seats.