JP2002046563A - Air bag for passenger seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag for passenger seat, in which using amount of material of a stream living cloth is reduced as much as possible and is capable of developing rearward along the surface of an instrument panel at the beginning of development and expansion. SOLUTION: The air bag 10 is arranged to the instrument panel at the front of the passenger seat. In the air bag 10, the stream living cloth 20 covers a gas inlet port 12 to block both sides of right and left directions of a vehicle and opens both sides of front and rear directions of the vehicle, so that expansion gas G flowing from the gas inlet port 12 flows both sides of the front and rear directions of the vehicle. The stream living cloth 20 has a part 29 opposite to the gas inlet port 12 at a time of flowing the expansion gas in the air bag, and a sectional shape of the part 29 in the front and rear directions of the vehicle is a curve expanding in a direction apart from the gas inlet port 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag used in a passenger airbag device disposed on an instrument panel in front of a passenger seat.

[0002]

2. Description of the Related Art Conventionally, in an airbag used in a passenger airbag device, at the initial stage of deployment and inflation, the airbag is quickly deployed in the front-rear direction of the vehicle, and is moved rearward at a wide angle in a vertical direction. The rectifying cloth is disposed inside the airbag body so as to cover the gas inlet through which the inflation gas flows, close both sides in the left-right direction of the vehicle, and open both sides in the front-rear direction of the vehicle. (Japanese Unexamined Patent Application Publication No. 11-278
192, etc.). This rectifying cloth has a belt-like shape extending in the left-right direction, and the left and right sides are joined to the left and right sides at the peripheral edge of the gas inlet.

[0003] In such an airbag, in order to reduce the pressing force on the occupant located on the front side of the vehicle, inflation gas flowing to the rear side of the vehicle inside the airbag at the initial stage of deployment and inflation is supplied to the instrument panel. It is desirable to flow backward as much as possible along the surface. To cope with this, it is conceivable to increase the width dimension of the straightening cloth in the vehicle front-rear direction, and in particular to increase the length dimension extending from the portion facing the gas inlet to the vehicle rear side.

However, such a measure requires extra cloth material for the rectifying cloth, and when a high-output inflator is used as the inflator for supplying the inflation gas, the rectifying cloth is required. There was a case where the rear end side was turned up, and the arrangement significance of the rectifying cloth was lost.

The present invention has been made to solve the above-mentioned problems, and minimizes the amount of material used for a straightening cloth, so that the air for a passenger seat can be deployed rearward along the surface of an instrument panel in the initial stage of deployment and inflation. The purpose is to provide a bag.

[0006]

An airbag according to the present invention is used in an airbag device for a front passenger seat disposed on an instrument panel in front of a front passenger seat, and a rectifying cloth for inflating air flowing from a gas inlet. In order to allow gas to flow to both sides of the vehicle in the front-rear direction, inside the airbag body, the gas inlet is covered, the left and right sides of the vehicle are closed, and both sides of the vehicle are opened and arranged. A passenger seat airbag, wherein the rectifying cloth has a cross-sectional shape in a vehicle front-rear direction facing the gas inlet when the inflation gas flows in, as a curved shape that expands in a direction away from the gas inlet. It is characterized by being.

The straightening cloth has an opening area on the front end side of SF,
When the opening area of the rear end side is SB and the opening area of the intermediate portion in the front-rear direction is SC, it is desirable that SC>SF> SB.

The straightening cloth is fixed to the periphery of the gas inlet of the airbag body, and ends extending in the left and right directions from the fixed part are connected to each other in a curved shape in the vehicle longitudinal direction. It is desirable to form.

[0009]

According to the airbag for a passenger seat according to the present invention,
When the inflation gas flows in from the gas inlet at the initial stage of deployment and inflation, the inflation gas interferes with the rectifying cloth and is branched and flows into the front side and the rear side of the vehicle. In this case, the cross-sectional shape of the rectifying cloth in the vehicle front-rear direction facing the gas inflow port when the inflation gas flows in has a curved shape expanding in a direction away from the gas inflow port. Therefore, when the inflation gas flowing from the gas inflow port interferes with the portion of the straightening cloth facing the gas inflow port and flows toward the rear of the vehicle, the inflation gas is not parallel to the instrument panel surface along the straightening cloth curve. Instead, the airbag body is deployed by being changed to the direction toward the instrument panel surface side, and as a result, the airbag body moves toward the rear side along the instrument panel surface as much as possible.

In addition, the straightening cloth does not extend the length dimension to the rear side of the vehicle but simply changes the cross-sectional shape in the vehicle front-rear direction facing the gas inlet when the inflation gas flows, in a direction away from the gas inlet. Since it can be formed only by forming a curved shape that swells, the amount of material used can be reduced as much as possible.

Therefore, the airbag for the passenger seat according to the present invention can be deployed rearward along the surface of the instrument panel in the initial stage of deployment and inflation, while minimizing the amount of material used for the straightening cloth.

The opening area on the front end side of the straightening cloth is S
F, when the opening area of the rear end side is SB and the opening area of the intermediate portion in the front-rear direction is SC, when SC>SF> SB, and when the rectifying cloth is provided, the rectifying cloth and the airbag body are used. Regarding the opening areas on both sides in the front-rear direction of the vehicle to be configured, the opening area of the front opening is larger than that of the rear opening. Therefore, when the airbag is inflated and inflated, the inflation gas flowing to the front of the vehicle has a larger flow rate than the inflation gas flowing to the rear of the vehicle. , Protruding from the instrument panel and quickly moving backwards along the windshield, and as a result, the occupant side of the airbag,
It can be arranged quickly in the vertical direction. Then, the occupant-side surface of the airbag body moves to the vehicle rear side in a state where the airbag body is disposed along the vertical direction, and does not partially protrude and interferes with the occupant on a wide surface. As a result, it is possible to reduce the pressing force applied to the occupant per unit area.

Further, when the portion of the straightening cloth facing the gas inlet is formed in a predetermined curved shape, the straightening cloth is fixed to the periphery of the gas inlet of the airbag body, and both sides in the left-right direction from the fixed part. If the end portions extending from each other are connected in a curved shape in the vehicle front-rear direction to form a straightening cloth, the end portions of both members extending from the periphery of the gas inflow port are simply planarized.
By simply connecting the straightening cloth in a curved shape, the portion of the straightening cloth facing the gas inlet can be formed in a predetermined curved shape. Therefore, the work of providing the rectifying cloth in the airbag body can be easily performed.

[0014]

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

As shown in FIG. 7, the airbag 10 of the embodiment is a top-mounted type airbag device M for a passenger seat, which is disposed on the upper surface 1a side of the surface of an instrument panel (hereinafter abbreviated as an instrument panel) 1. The airbag device M includes a folded airbag 10, an inflator 34 for supplying an inflation gas to the airbag 10, a case 36 for accommodating and holding the airbag 10 and the inflator 34. , Airbag 1
And an airbag cover 47 for covering the folded airbag 10.
And two pressing plates 45 for firmly connecting the airbag cover 47 to the case 36.

The retainer 31 for attaching the airbag 10 to the case 36 is made of a rectangular ring-shaped sheet metal and includes a plurality of bolts 31a extending downward at predetermined positions. The retainer 31 connects each bolt 31a to the airbag 10
And the case 3
6 and the holding plate 45, which will be attached to the case 36 by being inserted through a bottom wall portion 39 and a horizontal plate portion 45 a, which will be described later, and screwing a nut 31 b to each bolt 31 a.

The inflator 34 is of a cylinder type and is housed and held in a lower chamber 41 of the case 36 which will be described later.

The airbag cover 47 is made of a thermoplastic elastomer such as an olefin or ester resin, and is provided with a ceiling wall 48 disposed to close the rectangular opening 2 of the instrument panel 1, and a ceiling wall 48. And a substantially rectangular cylindrical side wall portion 49 extending downward from the lower surface of the portion 48. The ceiling wall portion 48 has two door portions 48a, with a thin portion to be broken 48b disposed around the inside surrounded by the side wall portion 49. The breakable portion 48b is arranged in a substantially H shape when viewed from above the ceiling wall portion 48. When the breakage portion 48b is pushed by the airbag 10 at the time of inflation and breaks, the door portions 48a are separated from each other as shown in FIGS. As shown by the two-dot chain line, the door is opened in the front-rear direction of the vehicle such that the door is opened. In addition, a plurality of locking legs 48c protruding downward are formed on the front and rear edges of the ceiling wall portion 48 of the vehicle. Each locking leg 48c is locked on the lower surface side of the flange portion 3 provided with a step around the periphery of the opening 2 of the instrument panel 1. A plurality of locking holes 49 penetrating in the front-rear direction of the vehicle are provided in the side wall portion 49 in the front-rear direction of the vehicle.
The side wall portion 49 is connected to an upper chamber 37 of the case 36, which will be described later, using the locking holes 49a and the holding plate 45.

The holding plate 45 is formed of sheet metal and has an L-shaped cross section having a horizontal plate portion 45a and a vertical plate portion 45b extending upward from an end of the horizontal plate portion 45a.
6 of the vehicle 6 in the front-rear direction. A through hole (not shown) for inserting each bolt 31a of the retainer 31 is formed in each horizontal plate portion 45a, and an upper end of each vertical plate portion 45b is inserted into a later-described locking projection 38a of the case 36. It is formed to be possible.

The case 36 is made of sheet metal and has a rectangular parallelepiped upper chamber 37 having an upper opening, and a lower chamber 41 disposed on the lower side of the case 36 so as to communicate with the upper chamber 37.
And is composed of

The upper chamber 37 has a substantially rectangular cylindrical peripheral wall portion 38.
And a bottom wall portion 39 arranged below the peripheral wall portion 38. A locking projection 38a inserted into each locking hole 49a of the airbag cover side wall portion 49 is formed on the peripheral wall portion 38.
Are formed so as to protrude outward. Bottom wall 39
Are formed with through holes (not shown) through which the bolts 31a of the retainer 31 are inserted. On the lower surface of the vehicle in the front-rear direction, horizontal plate portions 45a of the holding plate 45 are respectively provided.
Are arranged in contact with each other.

The lower chamber 41 includes a substantially rectangular cylindrical peripheral wall 42 extending downward from the inner end of the bottom wall 39 and a bottom wall 43 closing the lower end of the peripheral wall 42. ing. A nut 43 a for attaching the case 36 to the body 5 is attached to the bottom wall 43. The bottom wall 43 is attached to a bracket 5b extending from the reinforcement 5a on the body 5 side.
It is attached to the bracket 5b by being screwed into a nut 43a through a connection hole (not shown) provided in the bracket 5b.

As shown in FIGS. 1 and 2, the airbag 10 has an airbag body 11 having a shape of a substantially triangular prism having an axis in the left-right direction of the vehicle. And a rectifying cloth 20 for changing the flow of the inflation gas G flowing into the inside.

A gas inlet 12 having a rectangular opening through which the inflation gas G flows is provided in a lower portion on the front side of the vehicle in the airbag body 11. A plurality of mounting holes 14 pass through the periphery of the gas inlet 12, and the bolts 31 a of the retainer 31 are inserted into these mounting holes 14, and the airbag body 11 is attached to the case 3.
6 is held by the bottom wall 39. Further, the airbag body 11 is provided with vent holes 15 for exhausting excess inflation gas G. Further, a reinforcing cloth 19 woven from a substantially square annular polyester or polyamide yarn is disposed near the mounting hole 14 on the inner peripheral surface side of the airbag body 11 at the periphery of the gas inlet 12.

When the airbag 10 is held on the case bottom wall 39 by the retainer 31 and the case 36 is attached to the body 5 and the airbag device M is mounted on the vehicle, the gas inlet 12 is closed. The opening surface is the opening edge 1
3, the front edge 13a side is slightly higher than the rear edge 13b side,
It is arranged so as to be substantially along the horizontal plane (Fig. 7
8).

Further, the airbag body 11 is shown in FIGS.
As shown in FIG. 1, the first base cloth 16 is manufactured by sewing first and second base cloths 16 and 17 woven from yarns such as polyester and polyamide. One (upper part 16a and lower part 16e) is connected to each other, and is formed in a gourd shape in which both left and right edges near the center are depressed, and the second base cloth 17 is formed in a substantially regular hexagonal shape. The base fabrics 16 and 17 are set so that the three-dimensional airbag body 11 can be sewn by a planar sewing operation.

As shown in FIGS. 1 to 5, the rectifying cloth 20 has a shape larger than the front, rear, left and right dimensions of the gas inlet 12 so as to cover the gas inlet 12 in the airbag body 11.
When the airbag 10 is deployed and inflated, the cross-sectional shape in the front-rear direction facing the vicinity of the center of the gas inlet 12 is changed to the gas inlet 12.
It has an arcuate curved shape swelling upward away from the object.

In the case of the embodiment, as shown in FIG. 3, the rectifying cloth 20 is configured as a rectifying cloth material 20P woven from a thread such as polyester or polyamide before being attached to the airbag body 11, as shown in FIG. Rectifying cloth material 20
P is provided with an opening 21 corresponding to the gas inlet 12 and with strips 23 and 24 extending from both sides of the opening peripheral edge 22 in the vehicle left-right direction. Holes corresponding to the mounting holes 14 are omitted from the rectifying cloth material 20P (illustrated symbols are omitted).
Are also provided. As shown in FIGS. 4 and 5, the rectifying cloth 20 uses the suture 18 to open the gas inlet 1 of the airbag main body 11 using the suture thread 18.
2, and further sewn to the edges 23 of the belts 23 and 24.
a and 24a are formed by sewing together in an arc shape.
In addition, the length in the vehicle left-right direction from the sewn portion of the gas inlet 12 around the band portion 23/24 to the joint 25 between the end portions 23a / 24a is longer at the front end portion 26 than at the rear end portion 28 and at the front end portion. An intermediate area 27 in the front-rear direction is set to be longer than 26, and the opening area of the front end 26 side is SF, the opening area of the rear end 28 side is SB, When the opening area of the intermediate portion 27 in the front-rear direction is SC, it is set so that SC>SF> SB.

In the case of the embodiment, the width B0 of the gas inlet 12 in the front-rear direction is 61 mm, the width B1 of the joint 25 in the front-rear direction is 300 mm, and the radius R of the joint 25 is 3 mm.
00 mm.

The manufacture of the airbag 10 of the embodiment will be described. First, as shown in FIGS.
Gas inlet 1 on the inner peripheral surface side of the airbag 10 in FIG.
2 at the peripheral edge 13 of the opening 2 using a suture 18
9 and the straightening cloth material 20P are stitched. Next, FIG.
As shown in (1), the ends 23a and 24a of the belt portions 23 and 24 of the straightening cloth material 20P are sewn in an arc shape using the suture thread 18 to form the straightening cloth 20 in a predetermined shape.

Thereafter, as shown in FIGS. 6A and 6B, the left and right edges of the first base fabric 16 near the gas inlet 12 extend in the left-right direction between the upper portion 16a and the lower portion 16e. It is folded back at the first reference line L1, and one side edge 16b, 16f of one of the upper and lower sides 16a, 16e near the reference line L1 is sewn to each other using the suture 18 while the other is sewn. The straight edges 16c and 16g are stitched together.

Then, as shown in FIGS. 6B and 6C, the upper and lower portions 16a and 1a are bent at a second reference line L2 extending in the left and right direction at the position of the upper portion 16a which swells in the left and right direction.
The remaining unsewn peripheral edges 16d and 16h of 6e are spread apart from each other. These remaining edges 16d and 16
The outer shape with h increased is the same as the outer shape of the second base cloth 17. For this reason, in a state where the remaining peripheral edges 16d and 16h of the upper and lower portions 16a and 16e of the first base fabric 16 are expanded and flattened, the peripheral edges are overlapped with each other.
The second base cloth 17 can be stacked.

Then, as shown in FIG. 6D, when the outer peripheral edges thus overlapped are sewn together using a suture thread 18, the airbag body 11 is formed in a bag shape. be able to.

Further, after the airbag body 11 is formed in a bag shape so that the seam allowance at which each part is sewn is not exposed on the outer peripheral surface side of the airbag 10, the airbag 12 is used to make use of the gas inlet 12. Turn the body 11 over.

When it is difficult to turn over the gas using the gas inlet 12, the band 23.
The operation of suturing the ends 23a and 24a of the fourth member 4 may be performed by turning the airbag body 11 upside down and then pulling out the bands 23 and 24 from the gas inlet 12.

The mounting of the airbag 10 manufactured as described above on a vehicle will be described. First, the airbag 10 is provided with the retainer 31 disposed inside so that the bolts 31a protrude from the mounting holes 14. Fold 10 and
The folded airbag 10 is wrapped with a breakable wrapping sheet 32 (see FIG. 7) so as not to collapse. When the airbag 10 is folded, the gas inlet 12 is formed so that the lower portion 10b side of the airbag 10 can easily extend from the upper surface 1a to the rear surface 1b of the instrument panel 1 during inflation and deployment.
The rear part is made longer, and the part is folded by reverse roll folding in which the part is wound on the lower surface side (see FIG. 7).

The inflator 34 is housed in the lower chamber 41 of the case 36 and the retainer 3
1 so that each of the bolts 31a of the first airbag 1 protrudes from each of the bottom walls 39 of the case 36.
7, the side wall portion 49 of the airbag cover 47 is externally provided in the upper chamber 37 from above, and the locking projections 38 of the peripheral wall portion 38 are provided in the respective locking holes 49 a of the side wall portion 49.
Insert a.

Next, the upper end of each vertical plate portion 45b is inserted through the locking projection 38a protruding from the side wall portion 49, and the bolt 31a is inserted through each horizontal plate portion 45a. Arrange the plates 45, 45,
Furthermore, if the nut 31b is screwed to each bolt 31a, the airbag device M can be assembled.

The passenger-side airbag device M thus assembled is the instrument panel 1 mounted on the vehicle.
Through the opening 2 to lock each locking leg 48c to the flange portion 3 and screw the bolt 6 to the nut 43a via the bracket 5b.
Can be mounted on a vehicle.

When the inflation gas G is discharged from the inflator 34 after the airbag device M is mounted on the vehicle, the airbag 10 is inflated to break the wrapping sheet 32 and break the airbag cover 47. Scheduled part 48
b is broken and the doors 48a are opened as shown by the two-dot chain lines in FIGS.
, It greatly protrudes.

In the airbag 10 of the embodiment,
When the inflation gas G flows in from the gas inflow port 12 in the initial stage of the expansion and inflation, the inflation gas G interferes with the rectifying cloth 20, and the gas GF flows to the front side and the gas GB to the rear side of the vehicle.
(See FIGS. 1 and 5). At that time, the rectifying cloth 20
However, the cross-sectional shape in the vehicle front-rear direction facing the gas inlet 12 when the inflation gas G flows in is a curved shape that expands in a direction away from the gas inlet 12. Therefore, the inflation gas G flowing from the gas inflow port 12 interferes with the portion 29 of the flow regulating cloth 20 facing the gas inflow port 12, and the inflation gas GB flowing to the vehicle rear side becomes a curve of the flow regulating cloth 20. Along the upper surface 1a of the instrument panel 1, instead of being parallel to the upper surface 1a of the instrument panel 1, so that the airbag body 11 is deployed. As a result, as shown by the two-dot chain line in FIG. 8, the airbag main body 11 is moved along the surface from the upper surface 1a to the rear surface 1b of the instrument panel 1 as much as possible.
It will go to the rear side.

The straightening cloth 20 itself does not extend its length toward the rear side of the vehicle, but simply has a cross-sectional shape in the front-rear direction of the vehicle that faces the gas inlet 12 when the inflation gas G flows. Since it can be formed only by forming a curved shape bulging upward away from the inlet 12, the amount of material used can be minimized.

Therefore, in the airbag 10 for the front passenger's seat of the embodiment, the amount of material used for the flow regulating cloth 20 can be minimized, and the airbag 10 can be deployed rearward along the surfaces 1a and 1b of the instrument panel 1 at the initial stage of deployment and inflation. .

In the case of the embodiment, the intermediate portion 27 in the front-rear direction of the portion 29 of the rectifying cloth 20 facing the gas inlet 12 is shifted rearward from the center of the gas inlet 12 in the front-rear direction, and 20 are arranged. Therefore, as compared with the case where the middle portion 27 is made to coincide with the center of the gas inflow port, the inflation gas GB flowing further backward can be caused to flow along the surface from the upper surface 1a to the rear surface 1b of the instrument panel 1. It becomes possible, the lower part of the airbag 10b
Can be developed along the surface of the instrument panel 1 as much as possible.

In the airbag 10 of the embodiment, the opening area SF on the front end portion 26 side of the rectifying cloth 20 is smaller than the opening area SC on the intermediate portion 27 in the front-rear direction, but the opening area SB on the rear end portion 28 side. More (SC
>SF> SB). Therefore, when the airbag 10 is deployed and inflated, the flow rate of the inflation gas GF flowing to the vehicle front side is larger than that of the inflation gas GB flowing to the vehicle rear side. The inflating airbag upper portion 10a protrudes from the instrument panel 1 and quickly moves rearward along the windshield W. As a result, the occupant-side surface 10c of the airbag 10 is
It can be arranged quickly in the vertical direction. Then, the occupant-side surface 10c of the airbag 10 moves to the vehicle rear side in a state where it is disposed along the vertical direction, and interferes with the occupant on a wide surface without partially protruding. As a result, it is possible to reduce the pressing force on the occupant per unit area.

Further, in the airbag 10 of the embodiment,
When forming a portion 29 of the straightening cloth 20 facing the gas inlet 12 into a predetermined curved shape, the opening peripheral edge 2 of the straightening cloth material 20P
2 are fixed to the peripheral edge 13 of the gas inlet 12 of the airbag body 11, and the end portions 23a and 24a of the belt portions 23 and 24 extending from the fixing peripheral portion 22 to both sides in the left-right direction.
The rectifying cloths 20 are formed by stitching the respective 24a in a curved shape in the vehicle front-rear direction. At that time, the gas inlet peripheral edge 22
The end portions 23a and 24a of the two band portions 23 and 24 extending from the straight line are simply sewn in a plane and in a curved shape, and a portion 29 of the straightening cloth 20 facing the gas inlet 12 is formed in a predetermined curved shape. Can be formed. Therefore, the work of providing the rectifying cloth 20 in the airbag body 11 can be easily performed.

If this point is not considered, the rectifying cloth 2
0 is formed in a belt shape extending in the left-right direction of the vehicle, and its left and right ends are joined to the peripheral edge of the gas inlet 12 using sewing or the like. A tack for shortening the length in the direction may be provided, and a cross-sectional shape in a vehicle front-rear direction of a portion facing the gas inlet 12 may be a predetermined curved shape.

The rectifying cloth material 20P is composed of two members, a material on the side of the band 23 having the opening periphery 22 and a material on the side of the band 24 having the opening periphery 22. The edge 2 is joined to the peripheral edge 13 by sewing or the like.
3a and 24a may be connected to each other. Of course, if a reinforcing cloth is used separately, these two members can be connected to the opening edge 2.
2 is provided on either one or both,
You may comprise so that it may be couple | bonded with the opening periphery 13 of the base cloth 16, and may be arrange | positioned.

Further, in the embodiment, the three-dimensional airbag 10 has been described. However, the flat bag which forms the airbag body by joining together the peripheral edges of the two base fabrics of the inflator 34 and the occupant side by sewing or the like. Then, the present invention may be applied.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view in a vehicle front-rear direction showing a state in which an airbag according to an embodiment of the present invention is inflated by itself.

FIG. 2 is a perspective view showing a state where the airbag according to the embodiment is inflated by itself.

FIG. 3 is a plan view showing members constituting the airbag of the embodiment.

FIG. 4 is a view showing a manufacturing process of the airbag of the embodiment, and shows a state in which a straightening cloth material is stitched to the airbag body.

FIG. 5 is a view showing a manufacturing process of the airbag of the embodiment, and shows a step after FIG. 4;

FIG. 6 is a view showing a manufacturing process of the airbag of the embodiment, and shows a step after FIG. 5;

FIG. 7 is a cross-sectional view showing a state where the airbag of the embodiment is mounted on a vehicle.

FIG. 8 is a diagram illustrating an inflated state of the airbag of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... (Instrument panel) instrument panel, 10 ... Airbag, 11 ... Airbag body, 12 ... Gas inlet, 13 ... Opening edge, 20 ... Rectifying cloth, 21 ... (Fixed portion) Opening edge, 23/24 ... Band Part, 23a / 24a ... end part, 25 ... connecting part, 26 ... front end part, 27 ... middle part, 28 ... rear end part, 29 ... facing part, SF / SC / SB ... opening area, G / GF / GB ... Inflation gas, M ... Airbag device for passenger seat.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yuji Kuriyama 1 Ochiai Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture F-term in Toyoda Gosei Co., Ltd. 3D054 AA03 AA14 BB12 BB13 BB16 CC10 CC15 CC30 CC34 CC41 DD13 FF17 FF20

Claims (3)

[Claims] An airbag device for a passenger seat disposed on an instrument panel in front of a passenger seat, wherein a rectifying cloth flows inflating gas flowing from a gas inlet into both front and rear sides of the vehicle. Inside the airbag body,
A passenger seat airbag that covers the gas inlet, closes both left and right sides of the vehicle, and opens both sides in the front and rear direction of the vehicle, wherein the rectifying cloth includes the inflation gas. Wherein the cross-sectional shape in the front-rear direction of the vehicle facing the gas inlet at the time of inflow of the airbag has a curved shape that expands in a direction away from the gas inlet. 2. The rectifying cloth has a front end side opening area of S
2. The passenger seat according to claim 1, wherein when F is an opening area on the rear end side and SB is an opening area of an intermediate portion in the front-rear direction, SC>SF> SB. For airbags. 3. A state in which the rectifying cloth is fixed to a peripheral edge of a gas inlet of the airbag body, and ends extending in the left-right direction from the fixing portion are connected to each other in a curved shape in the vehicle front-rear direction. The passenger airbag according to claim 1, wherein the airbag is formed.