JP2001277979A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device capable of variously and easily setting an air bag inflating shape according to elapsed time after actuating an inflator and capable of improving a degree of freedom of setting the air bag inflating shape according to the elapsed time. SOLUTION: This air bag device M1 has an air bag 11 having a gas inflow opening 11a, the inflator 23, a case 29 for housing an air bag inflator and a diffuser 13. The inflator has mutually independent gas generating parts 24 and 25 having gas discharge ports 24a and 25a capable of discharging inflating gas. The diffuser 13 is provided with gas flowing hole groups 18 and 19 of the number corresponding to the respective gas generating parts having gas flowing holes 18a and 19a so that the inflating gas discharged from the respective gas generating parts can be flowed in the different directions in the air bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device mounted on a vehicle, and more particularly, to an airbag device having a diffuser for restricting an inflow direction of inflation gas flowing from an inflator into the airbag. ,
The present invention relates to an airbag device suitable for a passenger seat disposed on an instrument panel in front of a passenger seat, a side collision disposed on a seat, a steering wheel disposed on a steering wheel, and the like.

[0002]

2. Description of the Related Art Conventionally, for example, in a passenger seat airbag device, an airbag which is folded and stored with an opening for gas inflow, an inflator for supplying inflation gas to the airbag, and And a case for accommodating and holding the airbag and the inflator (see Japanese Patent Application Laid-Open No. H11-268602).

[0003] A diffuser, which is held by a case and has a plurality of gas flow holes for regulating the flow of inflation gas flowing into the airbag, is provided near the opening of the airbag. Was.

However, in the conventional airbag device, even if the diffuser is arranged, if the inflator is activated, the inflation gas flows simultaneously through the gas flow holes of the diffuser. Low degree of freedom in the type of airbag inflated shape,
There were restrictions on the type of airbag inflation shape according to the elapsed time.

The present invention has been made to solve the above-mentioned problem, and it is easy to set various airbag inflation shapes according to the elapsed time after the operation of the inflator, and to set the airbag inflation shape according to the elapsed time. It is an object of the present invention to provide an airbag device capable of improving a degree of freedom.

[0006]

SUMMARY OF THE INVENTION An airbag device according to the present invention includes an airbag having a gas inflow opening and housed in a folded state, and an inflator for supplying an inflation gas to the airbag. A case accommodating the folded airbag and the inflator, and a plurality of gas circulation holes arranged near the opening to regulate the flow of inflation gas flowing into the airbag. And a diffuser, wherein the inflator is provided with a plurality of mutually independent gas generating units each having a gas discharge port capable of discharging an inflation gas. In addition, the diffuser is provided with a predetermined number of gas flow holes so that the inflation gas discharged from each of the gas generators can flow in different directions in the airbag. The number of gas flow holes group corresponding to the respective gas generators Te, respectively, wherein in the vicinity of the gas discharge ports of the gas generator, characterized in that it is arranged.

[0007] Then, around the inflator in the case, the inflating gas discharged from each of the gas generating portions is guided to a group of gas flow holes corresponding to each of the gas generating portions. It is desirable to provide a partition for partitioning the gas generating section.

[0008]

In the airbag apparatus according to the present invention, each of the inflators is provided with a gas discharge port capable of discharging an inflation gas, and is provided with a plurality of mutually independent gas generating sections. The operation timing of each gas generating unit can be appropriately shifted.

[0009] Each gas flow hole group of the diffuser is provided at a position near a gas discharge port of each gas generating portion so that inflation gas discharged from each gas generating portion can flow in a different direction in the airbag. And each gas generating part is
If the operation timing is shifted, according to the shifted time, the airbag inflation shape according to the elapsed time after the operation of the inflator can be variously changed, and a desired airbag according to the elapsed time can be changed. The expansion shape can be set.

[0010] Of course, if the diffuser is replaced and the arrangement and direction of the gas flow holes of each gas flow hole group are changed, the airbag inflation shape according to the elapsed time after the operation of the inflator can be variously changed. Thus, it is possible to further set a desired inflation shape of the airbag according to the elapsed time. Further, since the replacement of the diffuser is easy and the cost is lower than that of the inflator, it is possible to extremely easily set a desired airbag inflation shape according to the elapsed time.

Therefore, in the airbag apparatus according to the present invention, it is easy to set various airbag inflation shapes according to the elapsed time after the operation of the inflator, and the degree of freedom in setting the airbag inflation shape according to the elapsed time is increased. Can be improved.

If a partition is provided around the inflator in the case as described in claim 2, the inflation gas discharged from each gas generating section can be accurately and efficiently applied to each gas generating section. The gas can be guided to the corresponding gas flow hole group, and it is possible to reliably secure a desired inflation shape of the airbag according to the elapsed time after the operation of the inflator.

[0013]

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

The airbag device M1 of the embodiment is shown in FIG.
As shown in FIG. 2, a top-mount type passenger seat airbag device M1 is disposed on an upper surface side of an instrument panel (hereinafter abbreviated as an instrument panel) 1 in front of a passenger seat. The airbag device M1 for a passenger seat includes a folded airbag 11, an inflator 23 for supplying an inflation gas to the airbag 11, a case 29 accommodating and holding the airbag 11 and the inflator 23, A diffuser 13 that regulates a flow of inflation gas flowing into the airbag, a lid 51 that covers the folded airbag 11, and two pressing members 50 for firmly connecting the lid 51 to the case 29. It is configured.

In the case of the embodiment, the diffuser 1
3 also serves to attach the airbag 11 and the inflator 23 to the case 29.

As shown in FIGS. 1 to 3, the airbag 11 has a bag-like shape having a substantially rectangular opening 11a through which an inflation gas flows, and is made of a woven fabric such as polyester or polyamide. . Peripheral edge 11b of opening 11a
As shown in FIG. 3, is formed in a substantially square annular shape so as to correspond to the outer peripheral edge on the lower surface side of the diffuser 13. The opening edge 11b includes a long side portion 11c disposed on both sides in the front-rear direction of the vehicle, and a short side portion 11d disposed on both sides in the left and right direction of the vehicle. 11c, the airbag 11 is attached to the case 2 respectively.
A plurality (three in this embodiment) of attachment holes 11e for attachment to the mounting hole 9 are formed.

The diffuser 13 is made of sheet metal and includes a substantially rectangular annular frame portion 14 located on the outer peripheral edge, and a cover portion 17 arranged so as to close the inside of the frame portion 14.

The frame portion 14 has long side portions 14a, 14a arranged on both sides in the front-rear direction of the vehicle and short half side portions 14b, which are half-cylindrical cylindrical portions arranged on both sides in the left-right direction of the vehicle.
14b. Each long side 14
a, a plurality (three in the embodiment) of bolts 15 extending downward are projected, and each bolt 15 is inserted into a mounting hole 11 e of the airbag 11 and a through hole 38 a of the case 29, which will be described later. Then, by fixing the nut 20, the long side portion 11 c of the airbag 11 is a portion that allows the bolt 15 to penetrate and is pressed and held by a mounting seat 38 of the case 29 described later. Each short side portion 14b is a portion that holds the short side portion 11d of the airbag 11 against the outer peripheral surface of the inflator 23 by fixing each bolt 15 to the nut 20.

Further, at the inner portion of each short side portion 14b,
Each of them is formed with an inflator holding portion 16 that is recessed downward. The inflator holding portions 16 are disposed at four positions inside the short side portions 14b and at positions separated in the front-rear direction of the vehicle.
When stopping, directly press the outer peripheral surface of the inflator 23,
The inflator 23 is connected to a lower chamber 40 of the case 29 described later.
To be stored and held.

The cover portion 17 has two gas flow hole groups 18. 1 having a large number of gas flow holes 18 a and 19 a for regulating the flow of inflation gas from the inflator 23.
9 are provided. The gas flow hole group 18 is provided in the left region of the cover portion 17 and has a large number of gas flow holes 18a so that the inflation gas flows into the airbag 11 evenly from substantially the entire area of the opening 11a. Let it be configured. The gas flow hole group 19 is disposed in the right region of the cover portion 17, and a plurality (four in the embodiment) of gas is provided so that the inflation gas flows into the airbag 11 from the rear edge side of the opening 11 a. The flow holes 19a are arranged in a line at the rear edge side of the cover portion 17 and are configured.

The inflator 23 is of a cylinder type and has two gas generating portions 24 and 25 arranged in the axial direction. Each of the gas generating portions 24 and 25 supplies an inflation gas near the center of the inflator 23. A plurality of gas discharge ports 24a and 25a for discharging are respectively provided. Further, each of the gas generating parts 24 and 25 has a connecting hole 24 b.
25b is provided. In the connection holes 24b and 25b,
A lead wire 2 for inputting an electric signal from an airbag device operation circuit in order to operate each of the gas generation units 24 and 25.
6.27 are connected.

In the case of the embodiment, the gas generator 24
25, the gas generating unit 24 is first activated by an electric signal from the airbag device operation circuit, and 0.01 to 0.2.
It is set so that the gas generator 25 is activated after about 05 seconds.

The length of the inflator 23 in the axial direction is determined by the length of the lower chamber 40 (described later) of the case 29.
The dimension between the right side walls 44 and 45 is substantially equal.

Further, a substantially annular partition 48 is externally fitted to the inflator 23 at the boundary between the gas generating portions 24 and 25. The partition 48 is made of sheet metal, and its lower outer peripheral edge is fitted into a later-described concave groove 46 d of the case 20, and its upper outer peripheral surface is
The space between the lower chamber 40 side of the case 29 and the diffuser 13 is brought into contact with the lower surface of the diffuser 13 where the nut 20 is fixed between
It is divided into two corresponding to 4.25. The partition 48 allows the gas discharge port 2 of the gas generator 24
The gas for inflation GL discharged from the gas flow holes 4a
And the inflation gas GR discharged from the gas discharge port 25 a of the gas generation unit 25 passes through the gas flow hole group 19.

The lid body 51 is made of a thermoplastic elastomer such as polyolefin or polyester, and is provided with a ceiling wall 52 and a ceiling wall 52 which are arranged so as to close the rectangular opening 2 of the instrument panel 1. 52, which extend downward from the lower surface of the base 52.

The ceiling wall portion 52 has two door portions 53, 53 with a thin wall portion to be broken 54 disposed around the inside surrounded by the side wall portions 56, 57. The breakable portion 54 is arranged in a substantially H-shape when viewed from above the ceiling wall portion 52. When the breakable portion 54 is pushed by the airbag 11 at the time of inflation and breaks, the door portions 53 are closed as shown in FIG. As indicated by the dashed line, the door is opened in the front-rear direction of the vehicle so that the door is opened. In addition, a plurality of locking legs 55 projecting downward are formed on the front and rear edges of the ceiling wall portion 52 of the vehicle. Each locking leg 55 is locked on the lower surface side of the flange portion 3 provided with a step on the periphery of the opening 2 of the instrument panel 1.

The side wall portions 56 are respectively provided at portions in the front-rear direction of the vehicle, and the side wall portions 57 are respectively provided at left and right portions of the vehicle. A plurality (three in the embodiment) of locking holes 56a penetrating in the front-rear direction of the vehicle is formed in each side wall portion 56. Each side wall 56
Is connected to the upper chamber 30 of the case 29, which will be described later, using the holding member 50.

The holding member 50 is formed of sheet metal and has an L-shaped cross section including a horizontal plate portion 50a and a vertical plate portion 50c extending upward from an end of the horizontal plate portion 50a. In each of the parts in the directions. Each horizontal plate portion 50a has a diffuser 1
3, a through hole 50b through which each bolt 15 is inserted is formed, and an insertion portion 50d that can be inserted into each insertion hole 36a described later of the case 29 is formed at the upper end of each vertical plate portion 50c in a comb blade shape. ing.

The case 29 is made of sheet metal and has a rectangular parallelepiped upper chamber 30 having an upper opening as shown in FIGS.
And a lower chamber 40 arranged on the lower side of the case 29 so as to communicate with the upper chamber 30.

The upper chamber 30 has a substantially rectangular cylindrical peripheral wall portion 31.
And a mounting seat 38 disposed below the peripheral wall 31. The peripheral wall portion 31 includes front and rear side wall portions 32 and 33 disposed at positions opposed to each other in the front-rear direction of the vehicle, and left and right wall portions 3 disposed at positions opposed to each other in the left-right direction of the vehicle.
4.35. Front / rear side wall 32
On 33, locking projections 36 inserted into the locking holes 56 a of the lid side wall portion 56 are formed so as to protrude outward. Each of the locking projections 36 has an insertion hole 36a penetrating in a vertical direction at a portion protruding from the side wall portion 56 when inserted into the locking hole 56a.

The left and right side walls 34 and 35 are formed at their upper ends with flanges 37 projecting outward.
Each flange portion 37 has a mounting bolt 37a projecting downward.
The mounting bolt 37a is formed in a connecting hole 3a provided in the flange portion 3 on the peripheral edge of the instrument panel opening 2.
And the nut 4 is screwed into the bolt 37a, thereby being connected to the instrument panel flange 3.

The mounting seat 38 is formed so as to extend inward from the lower ends of the front and rear side walls 32 and 33, and has through holes 38a for inserting the bolts 15 of the diffuser 13 respectively. Note that, on the lower surface of the mounting seat 38, the horizontal plate portions 50a of the pressing members 50 are arranged in contact with each other.

The lower chamber 40 includes a substantially rectangular cylindrical peripheral wall 41 extending downward from the inner end of the mounting seat 38 and a bottom wall 46 closing the lower end of the peripheral wall 41. I have. The peripheral wall portion 41 includes front and rear side wall portions 42 and 43 disposed at positions opposed to each other in the front-rear direction of the vehicle, and left and right wall portions 44 and 45 disposed at positions opposed to each other in the left and right direction of the vehicle.
The through holes 44a and 45a for exposing the connection holes 24b and 25b of the inflator 23 are formed in the left and right wall portions 44 and 45, respectively.

The bottom wall 46 of the lower case chamber 40 has two nuts 46 that are recessed downward in the left and right direction.
The mounting hole 46a formed by providing b is provided.
Bolts 9 are screwed into the respective mounting holes 46a through connection holes 8a provided in the bracket 8 on the body 6 side, and as a result, the case 29 is fixed to the body 6 side.
Reference numeral 7 denotes a reinforcement to which the bracket 8 is fixed.

Support portions for supporting the inflator 23 from below are provided at both ends of the bottom wall portion 46 in the left-right direction of the vehicle in contact with the lower surfaces of the outer peripheral surfaces of the gas generating portions 24 and 25 of the inflator 23. 46c are formed.

Further, in the center of the bottom wall portion 46 in the left-right direction, a concave groove 46d for fitting the lower outer peripheral edge of the partition 48 is provided.
Are formed. Both ends of the concave groove 46d in the front-rear direction are
It extends to the part of each mounting seat 38.

The assembling of the airbag device M1 for the passenger seat of the embodiment will be described. The diffuser 13 is previously inserted inside the diffuser 13 so that the bolt 15 projects from each mounting hole 11e.
Is folded, the folded airbag 11 is wrapped with a breakable wrapping sheet 21 (see FIGS. 1 and 2) so that the airbag 11 is not broken.

The partition 48 is connected to the inflator 23.
After fitting outside at the boundary position between the gas generating parts 24 and 25 in the above, the partition 48 is fitted into the concave groove 46d,
The inflator 23 is moved to the lower portion of the case 29 so that the connection holes 24b and 25b are aligned with the through holes 44a and 44b, and the lower surfaces of the tip portions of the gas generating portions 24 and 25 are brought into contact with the support portions 46c and 46c. It is stored in the room 40.

Then, each bolt 1 of the diffuser 13
The airbag 11 folded from the upper opening 30a of the upper chamber 30 is housed in the upper chamber 30 so that the airbag 5 projects from the through hole 38a of each mounting seat 38 of the case 29. 51 side walls 56 and 57
Is mounted on the upper chamber 30, and the locking projections 36 of the side walls 32 and 33 are inserted into the locking holes 56a of the side wall 56.

Next, each insertion portion 50d is inserted into the insertion hole 36a of the locking projection 36 protruding from the side wall portion 56, and the bolt 15 is inserted into each through hole 50b.
The airbag device M1 can be assembled by disposing the pressing members 50, 50 at the front and rear portions of the case 29 and further screwing the nuts 20 to the bolts 15.

Then, the passenger-side airbag device M1 assembled in this manner is inserted through the opening 2 of the instrument panel 1 assembled to the vehicle to lock the locking legs 55 with the flange portion 3, and Connect each bolt 37a to the connection hole 3
a, and the nut 4 is fixed.
Is connected to the instrument panel 1, and further, the bolt 9 is screwed into each mounting hole 46 a through the connection hole 8 a of the bracket 8 to connect the case lower chamber 40 to the body 6.
It can be mounted on vehicles.

After the airbag device M1 is mounted on the vehicle, the inflator 23 is operated, and first, the gas generating section 24 is operated.
When the inflation gas GL is discharged from the gas discharge ports 24a, the inflation gas GL is discharged from the gas flow holes 18a of the gas flow hole group 18 disposed near the gas discharge ports 24a.
And flows into the airbag 11 through the opening 11a. Then, the airbag 11 inflates,
By breaking the wrapping sheet 21 and breaking the to-be-broken portion 54 of the lid 51 to open the doors 53 as shown by the two-dot chain line in FIGS. 2 and 4A, the case upper chamber 30 is opened. From the opening 30a. At this time, the gas flow hole group 18 is provided with a large number of gas flow holes 18a so that the inflation gas GL flows into the airbag 11 evenly from substantially the entire area of the opening 11a. Is a windshield W as shown in FIG.
, And expand and expand in the vertical and horizontal directions. Such an inflated shape of the airbag 11 makes it possible to suppress the pressing force of the airbag 11 on the occupant even when the occupant approaches the instrument panel 1 even if the airbag 11 interferes with the occupant. .

Next, the gas discharge port 25 of the gas generator 25
When the inflation gas GR starts to be discharged from a, the inflation gas GR passes through each gas flow hole 19a of the gas flow hole group 19 arranged near the gas discharge port 25a, and the opening 1
1a, flows into the airbag 11 and the airbag 11
As shown in FIG. 4B, the gas expands under the influence of the inflation gas GR regulated by each gas flow hole 19 a of the gas flow hole group 19. At this time, the gas flow hole group 19 is
Since a plurality of gas circulation holes 19a are provided so that the inflation gas GR flows into the airbag 11 from the rear edge side of the airbag 11, the airbag 11 has the occupant-side surface 11f expanded widely. In this state, it expands and expands so as to translate rearward. And such an airbag 1
The inflated shape of the airbag 11 makes it possible to suppress the pressing force of the airbag 11 on the occupant even if the occupant interferes with the occupant approaching the instrument panel 1.
Even if there is interference, the occupant can be pushed back over a large area.

Thereafter, the inflation gases GL and GR discharged from the two gas generators 24 and 25 cause the inflow of FIG.
As shown in FIG. 3C, the airbag 11 is deployed and inflated until the inflation is completed.

As described above, in the passenger seat airbag device M1 of the embodiment, the inflators 23
A gas discharge port 24a capable of discharging the inflation gas GL / GR
25a and two independent gas generators 24.
25, and each gas generating part 24
The operation timing has been shifted.

The two gas flow hole groups 18 and 19 of the diffuser 13 allow the inflation gases GL and GR discharged from the gas generators 24 and 25 to flow in different directions in the airbag 11. The gas generators 24 and 25 are provided near the gas discharge ports 24a and 25a.

Therefore, if the gas generating section 24 is operated and the gas generating section 25 is operated at a shifted operation timing, the flow of the inflation gas GL / GR is regulated by the gas flow hole groups 18 and 19. Together with this, it is possible to secure a desired inflation shape of the airbag 11 according to the elapsed time after the operation of the inflator until the inflation of the airbag 11 is completed.

For example, if the operation timings of the gas generating units 24 and 25 are reversed, the initial stage of the inflation of the airbag is
Since the inflation gas passing through the gas flow hole group 19 flows into the airbag 11, the deployment and inflation of the lower portion of the airbag 11 is accelerated, and the rear surface of the instrument panel 1, as indicated by the dashed line in FIG. The inflated shape of the airbag 11 extending downward and inflating on the 1a side can be ensured. In this case, even if a small occupant approaches the lower side of the instrument panel 1, the airbag 11 can smoothly communicate with the instrument panel 1. Airbag 1 between occupants
1 can be arranged.

Therefore, the airbag device M of the embodiment
In 1, the inflation shape of the airbag 11 according to the elapsed time after the operation of the inflator 23 can be easily set variously, and the degree of freedom of setting the inflation shape of the airbag 11 according to the elapsed time can be improved.

Of course, by replacing the diffuser 13,
Gas flow holes 18a and 19a of each gas flow hole group 18 and 19
If the arrangement position, number, direction, etc. of the airbags are changed, the airbag 11 according to the elapsed time after the operation of the inflator 23 is further changed.
The inflatable shape of the airbag 11 can be changed in various ways, and a desired inflated shape of the airbag 11 according to the elapsed time can be further set. Since the replacement of the diffuser 13 is easy and the cost is lower than that of the inflator 23, the desired inflation shape of the airbag 11 according to the elapsed time can be set extremely easily.

In the airbag device M1 of the embodiment, a partition 48 is provided around the inflator 23 in the case 29, and the inflation gas GL / GR discharged from each of the gas generators 24 and 25 is provided. Exactly without waste,
A group of gas flow holes 18 corresponding to the respective gas generating sections 24 and 25.
As a result, the desired inflation shape of the airbag 11 according to the elapsed time after the operation of the inflator 23 can be reliably ensured.

In the embodiment, the inflator 23
Although the case where the operation timings of the respective gas generating units 24 and 25 are shifted is illustrated, of course, by controlling the airbag device operation circuit, the gas generating units 24 and 25 are simultaneously operated, or only one of them is operated. The airbag 11 may be deployed and inflated.

In the embodiment, the inflator 23
However, as a cylinder type, two gas
5, the inflator may be constituted by three or more gas generating units. For example,
As shown in FIG. 5, when the inflator 73 is a disk-shaped disk type, three gas generating parts 74, 75, and 76 each having a predetermined number of gas discharge ports 74a, 75a, and 76a are provided. Thus, the inflator 73 may be configured. The diffuser 63 is provided with three partitions 48, 48, 48 on the cover 67 so that the gas generators 74, 75, 76 can be partitioned, and a diffuser 63 corresponding to each gas generator 74, 75, 76. The gas flow hole groups 68, 69, 70 are arranged. Each gas flow hole group 68, 69, 70 has a gas flow hole 68a, 69a, 70a through which an inflation gas flows in a predetermined direction.
Are formed. The airbag device M shown in FIG.
2, a plurality of bolts 65 are disposed on an annular frame portion 64 of the diffuser 63, and these bolts 65 are attached to the mounting holes 1 in the peripheral edge 11 b of the opening 11 a of the airbag 11.
1e, case 69, flange portion 7 of inflator 73
The airbag 11, the diffuser 63, and the inflator 73, which have been folded, are assembled to the case 79 by penetrating the case 3 a and fastening a nut (not shown) to the bolt 65.

Also in such an airbag device M2, each gas flow hole group 68, 69, 70 of the diffuser 63 is
The gas discharge ports 74a, 75a of the gas generators 74, 75, 76 allow the inflation gas discharged from the gas generators 74, 75, 76 to flow in different directions in the airbag 11.
If the gas generators 74, 75, and 76 are operated at staggered operation times, they are arranged at positions near the position 76a, and the time elapsed after the operation of the inflator 73 is changed according to the shifted time. The inflated shape of the airbag 11 can be changed in various ways, and a desired inflated shape of the airbag 11 according to the elapsed time can be secured.

Of course, by replacing the diffuser 63,
The gas flow holes 68a of each gas flow hole group 68/69/70
By changing the arrangement position, number, direction, etc. of the 69a and 70a, the inflation shape of the airbag 11 according to the elapsed time after the operation of the inflator can be variously changed. Of the airbag 11 can be set.

In the gas generators 24 and 25 of the inflator 23 of the embodiment, the gas discharge ports 24a and 2
Although the number of 5a is equal to each other, the number of gas discharge ports 74a, 75a, 76a may be changed in each gas generating section 74, 75, 76 as in the inflator 73 shown in FIG. In this case, each of the gas generating units may be configured by changing the kind of the discharge amount of the inflation gas or the peak timing of the discharge flow rate.

Further, in the embodiment, the airbag device M1 for the passenger seat has been described as an example. However, if a diffuser for regulating the inflow direction of the inflation gas flowing from the inflator into the airbag is provided, the airbag device M1 may be disposed on the seat. The present invention can be applied to an airbag device for a side collision, a steering wheel disposed on a steering wheel, and the like.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view in a vehicle left-right direction showing a use mode of a passenger airbag device according to an embodiment of the present invention;
It corresponds to the II site in FIG.

FIG. 2 is a longitudinal cross-sectional view in a vehicle front-rear direction showing a use mode of the passenger airbag device of the embodiment, and is a II-II of FIG.
Corresponds to the site.

FIG. 3 is a schematic exploded perspective view of the airbag device of the embodiment.

FIG. 4 is a view sequentially showing an operation mode of the airbag device for a passenger seat of the embodiment.

FIG. 5 is a schematic exploded perspective view showing another embodiment.

[Explanation of symbols]

11 airbag 11a opening 11b opening edge 13.63 diffuser 18.19.68.69.70 gas flow hole group 18a / 19a / 68a / 69a / 70a gas flow hole 23 · 73: inflator, 24 · 25 · 74 · 75 · 76 · gas generator, 24a · 25a · 74a · 75a · 76a · gas outlet, 29 · 79 · case, 48 · partition, G (GL · GR) · · · Inflation gas, M1, M2 ... airbag device.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriyoshi Suzuki 1 Ochiai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. F-term (reference) in Toyoda Gosei Co., Ltd. 3D054 AA02 AA03 AA06 AA13 AA14 AA21 BB10 BB11 BB13 BB16 CC09 DD10 DD15 EE20 EE28 EE29 EE30

Claims (2)

[Claims] 1. An airbag having a gas inflow opening and housed in a folded state, an inflator for supplying an inflation gas to the airbag, and the folded airbag and the inflator are housed. And a diffuser disposed near the opening and having a plurality of gas flow holes for restricting the flow of the inflation gas flowing into the airbag. The inflator is configured to include a plurality of mutually independent gas generating units each having a gas discharge port capable of discharging an inflation gas, and the diffuser is configured to discharge the gas from each of the gas generating units. A predetermined number of gas circulation holes are provided so that the inflation gas to be introduced can flow in different directions in the airbag. An airbag device, wherein a group of holes is disposed at a position near a gas discharge port of each of the gas generating sections. 2. The gas generating device according to claim 1, wherein the inflation gas discharged from each of the gas generating portions is guided to a group of gas circulation holes corresponding to each of the gas generating portions. The airbag device according to claim 1, wherein a partition that partitions the generating section is provided.