WO2007099668A1

WO2007099668A1 - Airbag and airbag device

Info

Publication number: WO2007099668A1
Application number: PCT/JP2006/320592
Authority: WO
Inventors: Shinichi Sugimoto; Atsushi Noguchi
Original assignee: Takata Corporation
Priority date: 2006-03-01
Filing date: 2006-10-16
Publication date: 2007-09-07
Also published as: JP2007230396A

Abstract

[PROBLEMS] An airbag inflated and expanded over the head of a vehicle occupant, in which a head protection area is expanded to enhance side protection performance for the occupant's head. [MEANS FOR SOLVING PROBLEMS] The airbag (11) has a first panel (35A) placed on the occupant side and a second panel (35B) placed on the side opposite the occupant, wherein the first and second panels (35A, 35B) are joined together. The airbag (11) has a first airbag (11A) and a second airbags (11B, 11B). The first airbag (11) has a first chamber (42) formed between the first panel (35A) and the second panel (35B) and placed on the upstream side in the flow direction of gas supplied from an inflator (13) and also has side sections (11S, 11S) inflated and expanded to the sides of the head (2A) of the occupant. The second airbags (11B, 11B) have second chambers (43, 43) formed between the joined first and second panel (35A, 35B), placed on the downstream side in the flow direction of the gas supplied from the inflator (13), and inflated and expanded over the head (2A) of the occupant(2).

Description

Specification

Air bag and air bag device

Technical field

TECHNICAL FIELD [0001] The present invention relates to an air nog and an airbag device that are installed in a vehicle such as an automobile.

Background art

[0002] Conventionally, for example, a driving center airbag device that inflates and deploys to the driver side in the driver seat, a passenger seat airbag that inflates and deploys to the passenger seat side from the instrument panel cover, etc. Various airbag devices are used to restrain the occupant's body during a car crash.

[0003] In recent years, in the event of a major accident in which a large external force is applied to the vehicle, such as a vehicle body rollover due to a collision or a fall of a heavy object such as a fallen tree, there is a possibility that an impact will be applied to the occupant's overhead force due to the impact at that time For this reason, an air bag for dealing with such a case has already been proposed (see, for example, Patent Document 1).

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2002-37011

Disclosure of the invention

Problems to be solved by the invention

[0005] In the above-described conventional technology, an airbag configured with a bag strength combined with a base fabric is stored in a backrest (or headrest) of a vehicle seat, and pressure fluid from an inflator is supplied to the airbag in an emergency. Thus, the basic configuration for expanding and deploying above the passenger's head is disclosed.

[0006] An object of the present invention is to provide an airbag that can expand the head protection range and improve the side protection performance of the head in an airbag that is inflated and deployed above the head of an occupant. It is in.

Means for solving the problem

[0007] In order to achieve the above object, according to a first aspect of the present invention, an airbag that inflates and deploys above an occupant's head includes a side portion that inflates and deploys toward the occupant's head. Features The

[0008] In the first invention of the present application, since the side portion inflating and deploying toward the occupant's head side is provided, movement of the occupant's head to the side can be restricted. This can reduce the burden on the passenger's head (especially the side burden) when the vehicle collides (including side collisions) or rolls over. Side protection performance can be improved.

[0009] A second invention includes an air bag comprising a first panel disposed on the occupant side and a second panel disposed on the opposite side of the occupant, and coupling the first and second panels together. A first chamber provided between the joined first panel and the second panel and provided upstream in the flow direction of the pressure fluid supplied to the inflation tank, the head of the occupant A first bag having a side part that inflates and deploys to the side of the part, and a flow direction of the pressure fluid that is configured between the joined first panel and the second panel and is supplied from the inflation tank downstream side And a second bag that is inflated and deployed above the head of the occupant.

[0010] In the second invention of the present application, when the inflation fluid is also supplied with the pressure fluid to the airbag, first, the first bag having the first chamber provided on the upstream side in the flow direction of the pressure fluid is expanded and deployed. . At this time, the side portion of the first bag is inflated and deployed toward the side of the occupant's head. Thereafter, a second bag having a second chamber provided downstream in the flow direction of the pressure fluid is inflated and deployed above the head of the passenger. Accordingly, the movement of the occupant's head upward can be restricted by the second bag, and the movement of the occupant's head by the side of the first bag can also be restricted. As a result, when the vehicle collides (including side collisions) or rolls over, the burden on the passenger's head (especially the burden on the side) can be suppressed. Side protection performance can be improved.

[0011] A third invention is the above first or second invention, wherein the side portion is inflated and deployed on one side of the occupant's head when the airbag is inflated and deployed. It is characterized by comprising a second side portion that inflates and deploys on the other side of the occupant's head.

In the third invention of the present application, when the first bag is inflated and deployed, the first side portion is inflated and deployed to one side (for example, the right side) of the occupant's head, and the second side portion is the occupant's head. Inflate and deploy to the other side (eg left side). As a result, one side and the other side of the passenger's head (left and right The movement to both sides) can be restricted, so that the burden on the passenger's head (especially the side burden) can be further suppressed, the head protection range can be expanded, and the head side protection performance can be further improved. Can do.

[0013] A fourth invention is characterized in that, in the above-mentioned third invention, the first side portion and the second side portion each have a size capable of covering a side of the head of the occupant. To do.

[0014] Thus, when the vehicle collides (including a side collision or the like) or rolls over, the side of the occupant's head is covered with both sides by the first side and the second side, and the head Since the movement of the head to the side can be restricted, the burden on the passenger's head (especially the burden on the side) can be further suppressed, the head protection range can be expanded, and the head side protection performance can be further increased. Can be improved.

[0015] According to a fifth invention, in any one of the second to fourth inventions, the side portion allows the second bag to be led out above the head of the occupant when the first bag is inflated and deployed. It is characterized by having a deployment derivation unit.

[0016] In the fifth invention of the present application, when the first bag is inflated and deployed, the second bag is led out above the head of the occupant by the deployment lead-out portion provided on the side portion of the first bag. As a result, the second bag can be led out above the head of the occupant in advance, and then the second bag thus derived can be inflated, so that the deployability of the airbag can be improved.

[0017] In order to achieve the above object, a sixth invention supplies the airbag according to any one of the first to fifth inventions and a pressure fluid for inflating and deploying the airbag. And an inflator.

The invention's effect

[0018] According to the present invention, in the airbag inflated and deployed above the head of the occupant, the head protection range can be widened and the side protection performance of the head can be improved.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of a vehicle seat 1 equipped with an embodiment of an airbag according to the present invention. FIG. 1 (a) is a normal state, and FIG. 1 (b) is an inflation of the airbag. Shows the time. In FIG. 1, an occupant 2 is seated on the seat 1. The seat 1 has a seat part 1A, and the seat part 1A force and the backrest part 1B protrude upward. At the top of this backrest 1B is the head Rest 1C is installed.

[0021] The seat 1 is provided with an airbag device 10 in the backrest portion 1B for restraining the head 2A of the occupant 2 when the vehicle rolls over due to an accident. This airbag device 10 is composed of a bag body 35 (see FIG. 5) in which a first panel 35A and a second panel 35B (see FIG. 5) are sewn together, and is deployed above the head 2A of the occupant 2 when inflated. The air bag 11 provided in this manner, the retainer 12 accommodated in a state in which the airbag 11 is folded, and the inflator 13 for supplying a gas (pressure fluid) for inflating and deploying the airbag 11 (FIG. 2) , See Fig. 3). In addition, the seat 1 includes a seat frame 14 that forms a skeleton of the seat 1 with the same force as a side plate 14A (see FIG. 2) and a cross member 14B (see FIG. 2). The inflator 13 is provided on the seat frame 14 (details will be described later).

[0022] Although not shown in the figure, an automobile in which the airbag device 10 is mounted has an occurrence (or prediction of occurrence) of the automobile when the automobile collides (including a side collision) or rolls over. ) Various sensors for detecting are provided. Then, an inflator control circuit (not shown) force An initiator (not shown) of the inflator 13 is activated based on detection signals from these sensors.

As shown in FIG. 1 (a), the airbag 11 is housed in a folded state in the retainer 12 in a normal state. On the other hand, for example, when the automobile rolls over, the inflator 13 of the airbag device 10 is ignited by the inflator control circuit (not shown), and the airbag 11 is inflated as shown in FIG. Deploy between the roof 3 of the car and the head 2A of the occupant 2 and on both sides of the head 2A (shown by 11S).

Note that, for example, in the case of an automobile such as an open car without the roof 3, the airbag 11 is deployed above the head of the occupant 2 and on both sides.

FIG. 2 is a perspective view showing a structure for fixing the airbag device 10 to the seat frame 14, and FIG. 3 is an exploded perspective view of the airbag device 10 showing the fixing structure in more detail.

2 and 3, the seat frame 14 includes a pair of side plates 14 A and 14 A provided on both sides in the vehicle width direction (both sides in the left-right direction in FIG. 2) in the backrest portion 1 B of the seat 1. The side plates 14A and 14A are extended so as to extend substantially along the vehicle width direction. The side plate 14A has a cross member 14B connecting the 14A. The side plates 14A, 14A and the cross member 14B are both provided in the backrest portion 1B of the seat 1. Although not particularly illustrated, the seat frame 14 also includes a base plate provided in the seat portion 1A.

[0027] On the base end side of the airbag 11 (the inflator side, the lower side in FIG. 3), a gas supply port 1 la connected to the inflator 13 via the pipe member 20, and the gas supply port 1 la Mounting pieces l ib and l ib and force S are provided on both sides. The mounting pieces l ib and l ib are formed with two bolt holes 22 through which mounting bolts 21a for fixing the airbag 11 and the retainer 12 are passed. On the other hand, the retainer 12 is provided with mounting portions 12a and 12b each having bolt holes 24 through which mounting bolts 23 for fixing the retainer 12 are inserted on both sides in the vehicle width direction. On the inflator side (lower side in FIG. 3), a mounting portion 12c having a bolt hole 25 similarly provided at a position corresponding to the bolt hole 22 of the airbag mounting portion ib is provided.

[0028] A plurality (four in the present embodiment) of the mounting bolts 21a includes a bolt hole 25 formed in the retainer mounting portion 12c in a state where the airbag 11 is folded and stored in the retainer 12, and an airbag. The bolt holes 22 of the mounting portion 1 lb and the bolt holes 27 drilled at the positions corresponding to the bolt holes 22 of the airbag mounting portion 1 lb of the mounting plate 26 are respectively inserted and fastened to the nut 21b. Thereby, the airbag 11 is fixed to the retainer 12 in a folded state. A plurality (two in this embodiment) of the mounting bolts 23 are passed through the bolt holes 24 of the retainer mounting portions 12a and 12b, and then fastened to fastening holes (not shown) provided in the cross member 14B. . As a result, the retainer 12 stored in a state where the airbag 11 is folded is fixed to the cross member 14B.

The pipe member 20 is, for example, a metal pipe bent at a plurality of locations (two locations in the present embodiment), and is provided below the retainer 12. The noise member 20 and the airbag 11 are connected to each other by covering the gas supply port 11a of the airbag 11 on the bag-side end portion 20a of the noise member 20 and fixing by caulking with a metal clamp band 30, for example. Yes. Further, the pipe member 20 and the inflator 13 are in contact with each other by connecting a connecting portion 20b provided at an inflator side end portion of the pipe member 20 to an upper end portion 13a of the inflator 13. Connected by wearing (or welding). In this way, the airbag 11 and the inflator 13 are connected via the pipe member 20.

[0030] The inflator 13 is provided further below the pipe member 20, and is attached to the side plate 14A on one side (in the present embodiment, on the right side in the vehicle width direction) by an attachment member 31. The mounting member 31 includes a pair of mounting plates 31 A and 31 B that sandwich and support the inflator 13, and these mounting plates 31 A and 31 B include a plurality of (in this embodiment) formed on the mounting plate 31 A. Four rivets 3 la are inserted into a plurality of (four in this embodiment) rivet holes 3 lb drilled at corresponding positions on the mounting plate 3 IB, and are connected by rivets to sandwich the inflator 13. It is fixed with. A mounting portion 31c formed by bending approximately 90 degrees is provided at one end (right side in the vehicle width direction) of the mounting plate 31A, and a plurality (two in this embodiment) of mounting bolts 32 are provided. The mounting member 31 is fixed to the side plate 14A by being passed through the bolt holes 33 formed in the mounting portion 31c and fastened to the fastening holes (not shown) provided in the side plate 14A. As a result, the inflator 13 is fixed to the side plate 14A via the attachment member 31.

Note that one end of the connector 34 connected to the inflator 13 is drawn out of the airbag device 10 and connected to the above-described inflator control circuit (not shown). Although not shown, the vehicle on which the airbag device 10 is mounted is subject to occurrence (or prediction of occurrence) when the vehicle collides (including side collisions) or rolls over. There are various sensors to detect. The inflator control circuit activates the initiator of the inflator 13 based on the detection signals of these sensor forces.

FIG. 4 is a perspective view showing the overall structure of the airbag 11 in the middle of inflating and deploying (a state in which the airbag 11 is inflated).

In FIG. 4, the airbag 11 includes an inflator 13, a first bag 11 A having a first chamber 42 (described later) provided on the improved flow direction of the gas supplied to the inflator 13, and an inflator 13. The second chambers 43 (described later) provided on the downstream side in the flow direction of the gas supplied from the inside are respectively provided on the inside (on the rear side of the vehicle, left side in the figure) opposite to the occupant 2 of the first bag 11A. When placed and inflated, push the head 2A of the occupant 2 toward the front of the vehicle. A pair of second bags 11B and 11B are provided which are bent out and bent forward and restrain the upward movement of the head 2A of the occupant 2. The first bag 11A and the second bags 11B, 11B are connected to each other by communication portions 11C, 11C each having a communication path 44 (described later).

[0034] Here, the upstream side and the downstream side first flow into the first chamber 42 in the first bag 11A from the inflator 13 through the gas supply port 1 la, and then communicate with the communication paths 44, 44. Then, in the flow direction of the gas flowing into the second chambers 43 and 43 in the second bags 11B and 11B, the upstream side and the downstream side of the communication path 44 are indicated (see FIG. 5 described later).

[0035] The second bag 11B is configured in a long shape so that one end in the longitudinal direction (the upper side in Fig. 4) is positioned above the head 2A of the occupant 2 when inflated and deployed. The communication portion 11C is connected to the other longitudinal side of the second bag 11B (the lower side in FIG. 4). Further, the gas supply port 11a described above is provided in the lower portion of the first bag 11A, and the gas injected from the inflator 13 passes through the pipe member 20 and the gas supply port 1la to enter the first bag 11A. The first chamber 42 and the communication passages 44 and 44 in the communication portions 11C and 11C are supplied to the second chambers 43 and 43 in the second bags 11B and 11B. FIG. 4 shows a state where the gas supplied from the inflator 13 flows into the first chamber 42 and the airbag 11 is expanded to the first bag 11A.

[0036] On the left and right sides (both sides in the vehicle width direction) of the first bag 11A, there are substantially rectangular side portions 11S, 11S (first side portion, second side portion) having deployment lead-out portions 50, 50. It is provided to protrude. Each of the side portions 11S and 11S has a size capable of covering the side of the passenger's head 2A (see FIG. 1 (b)). The unfolding parts 50 and 50 and the edge parts (parts) of the second bags 11B and 11B are joined by sewing (shown as a sewing joint part 51 in FIG. 4). Further, the second bags 11B and 11B are joined to each other by sewing at a substantially central portion in the width direction of the airbag 11 (shown as a sewing joint portion 52 in FIG. 4). With such a configuration, when the first bag 11A is inflated and deployed, the side portions 11S and 11S are deployed to the side of the head 2A, and the deployment lead-out portions 50 and 50 of the side portions 11S and 11S 2 The bags 11B and 11B are led out above the head 2A of the occupant 2 (as shown in FIG. 4), and then the gas from the inflator 13 passes through the communication passages 44 and 44 in the communication portion 11C and 11C. 2 is supplied to the second chamber 43, 43 in the bag 11B, 11B, and the second bag 11B, 11B Each is inflated.

[0037] The airbag 11 having the first bag 11A and the second bag 1 IB is disposed on the side opposite to the first panel 35A and the occupant 2 (vehicle rear side) disposed on the occupant 2 side (vehicle front side). A single bag 35 is formed by sewing and joining the second panel 35B to be arranged.

[0038] FIG. 5 shows the overall structure of the bag body 35 before being folded (before the first bag 11A is placed in front of the second bag 11B by bending the communication portion 11C as shown in FIG. 4). FIG. 6 is a plan view seen from the second panel 35B side. Since the bag body 35 is substantially symmetrical, the left half is not shown.

[0039] As shown in FIG. 5, the bag body 35 is supplied with gas from a first panel 35A and a second panel 35B (only the second panel 35B is shown in FIG. 5) having substantially the same shape. The mouth is formed as one bag by being sewn and joined over the entire circumference excluding the la portion. In the figure, reference numeral 40 denotes the sewing joint portion, and reference numeral 41 denotes a sealing material portion that also serves as an appropriate sealing material provided along the sewing joint portion 40 for sealing the sewing joint portion 40.

[0040] The second panel 35B has a substantially trapezoidal first bag portion 35B1 that expands from the gas supply port 1la side (lower side in the figure) toward the opposite side (upper side in the figure). This first

One bag part 35B1 has a pair of second bag parts 35B2 and 35B2 provided on one side (right side in the figure) and the other side (left side in the figure, but not shown). The first panel 35A has substantially the same shape as the second panel 35B. The first panel 35A and the second panel 35B having such a shape are sewn and joined over the entire circumference except for the gas supply port 1 la as described above. 35B between the first chamber 42, a pair of second chambers 43, 43 disposed on one side (right side in the figure) and the other side (left side in the figure) of the first chamber 42, A force S is formed with the communication passages 44, 44 communicating with the first chamber 42 and the second chambers 43, 43, respectively. As a result, the first chamber 42, the second chamber 43, 43, and the communication path 44, 44 force as a whole, the outer edge portion of the first chamber 42, the second chamber 43, 43, and the sealing material portion 41 are enveloped. Placed in.

[0041] The first chamber 42 has a sewing joint portion 40a provided substantially along the gas inflow direction at a substantially central portion thereof, and sewing provided on both sides (left and right sides in the drawing) of the sewing joint portion 40a. Four chamber chambers 42a, 42b, 42c, 42d formed by the coupling parts 40b, 40b (not shown) Abbreviation). Thereby, the gas supplied from the gas supply port 11a can be smoothly introduced toward the downstream side (upper side in the figure) of the first chamber 42.

[0042] As described above, the side portions 11S and 11S having the deployment derivation portions 50 and 50 are provided on both the left and right sides (the left and right sides in FIG. 5) of the first bag 11A. Of the chamber chambers 42a, 42b, 42c, 42d constituting the first chamber 42, some of the 42a, 42d located on the left and right sides are inside the side portions 11S, 11S having the deployment lead-out portions 50, 50. Is formed.

[0043] The bag body 35 having the above-described configuration is sewn on the outer edge portion along the sewing joint portion 40 in a state where the first panel 35A and the second panel 35B are overlapped, and the first chamber 42 portion. Sewn along the sewing joints 40a, 40b, 40c, 40d, 40e, etc., then the second bag 1 IB, 11B on both sides is opposite to the occupant 2 against the first bag 11A as shown in FIG. In order to bend each of the communicating portions 11C and 11C along the fold line X so as to be located on the side (rear side of the vehicle) and hold the state, the second bag 11B and 11B are The edge portions 55 are sewn so that the protrusions 54 and 54 are aligned with each other (see the sewing joint portion 52 in FIG. 4), and then the unfolded portion 50, 50 of the first bag 11A, 56 and the second nogg 11B, 11B edge 57 are sewn so that the projecting pieces 58, 58 and the projecting pieces 59, 59 are aligned with each other (sewing shown in Fig. 4). Referring to engagement part 51), the second bag 11B, by fixing the 11B state arranged on the rear side of the first bag 11A, is produced. When the air bag 11 is attached to the retainer 12, the air bag 11 is folded and stored in the retainer 12. At this time, the mounting bolt 21a is passed through the bolt holes 22 and 22 of the mounting pieces l ib and l ib provided on the base end side (lower side in FIG. 5) of the first bag 11A. The

In the airbag device 10 having the above-described configuration, in the event of an emergency such as a vehicle collision, the sensor detects this, and the inflator control circuit force is also input to the initiator of the inflator 13 to input the above-described initiator. Is activated, the inflator 13 is activated, the air bag inflation gas is ejected, the airbag 11 is inflated and deployed toward the occupant 2 side, and the side portions 11S and 11S of the airbag 11 are occupant 2 Expands and expands on both sides of the head 2A.

[0045] According to the airbag 11 of the present embodiment that performs the configuration and operation described above, the following effects are obtained. Fruit is obtained.

That is, in the airbag device 10 of the present embodiment, when the gas is supplied from the inflator 13 to the airbag 11 as described above, first, the first chamber 42 provided upstream in the gas flow direction is provided. The gas flows into the first bag 11A and the first bag 11A is inflated and deployed, and the side portions 11S and 11S of the first bag 11A are inflated and deployed to the side of the head 2A of the occupant 2. Thereafter, the gas flows into the second chambers 43, 43 provided on the downstream side in the gas flow direction, and the second bags 11B, 11B are inflated and deployed above the head 2A of the occupant 2. This restricts the upward movement of the occupant head 2A by the second bags 11B and 11B, and also restricts the lateral movement of the occupant head by the side portions 11S and 11S of the first bag 11A. be able to. As a result, the burden on the passenger's head 2A (especially the lateral burden) can be suppressed when the vehicle collides (including side collisions) or rolls over, so the head protection range is widened and the head The side protection performance can be improved.

[0047] In the present embodiment, side portions 1IS and 11S are provided on both the left and right sides of the first bag 11A. When the first bag 11A is inflated and deployed, the side portion 11S on one side is inflated and deployed to one side (for example, the right side) of the occupant head 2A, and the side portion 11S on the other side is on the other side of the occupant head 2A ( For example, it expands and expands to the left). As a result, the movement of the occupant head 2A to one side and the other side (both left and right sides) can be restricted, so that the burden on the occupant head 2A (especially the side burden) can be further suppressed. The range of protection of the head can be widened, and the side protection performance of the head can be further improved.

[0048] Further, in the present embodiment, in particular, the side portions 1IS and 11S each have a size capable of covering the side of the occupant head 2A. As a result, when the vehicle collides (including a side collision) or rolls over, the sides 11S, 11S cover the sides of the occupant's head 2A with both side forces, and to the side of the head 2A. The movement of the passenger's head 2A (especially the side burden) can be further suppressed, the head protection range can be broadened, and the head side protection performance can be further improved. it can.

[0049] In the present embodiment, in particular, the side portions 11S, 11S provided on the left and right sides (both sides in the vehicle width direction) of the first bag 11A occupy the second bag 11B, 11B when the first bag 11A is inflated and deployed. It is configured to have deployment derivation sections 50 and 50 for derivation above the head 2A of 2 . As a result, the second bag 1 IB, 1 IB can be led out in advance above the head 2A of the occupant 2, and then the second bag 11B, 11B thus derived can be inflated. Can be improved.

In the above embodiment, the second bag 11B and the second bag 11B have substantially the same shape, and the force is not limited to this. That is, for example, the second bags 11B and 11B may be configured to have different widths, and the second bags 11B and 11B may be coupled at a position where the force in the width direction of the airbag 11 is substantially biased. The coupling position at this time is preferably a position different from the sewing coupling portions 40a and 40b of the first bag 11A. Thereby, the site | part where the thickness of an airbag becomes thin in a vehicle width direction can be reduced.

[0051] Further, in the above-described embodiment, as described above, the force for sewing and joining the first panel 35A and the second panel 35B to form the airbag 11 (bag body 35) is not limited to this. For example, the airbag 11 (the bag body 35) may be configured by connecting the first panel 35A and the second panel 35B by other connecting means such as a bag weaving!

Brief Description of Drawings

FIG. 1 is a schematic side view of a vehicle seat provided with an embodiment of an airbag device of the present invention.

FIG. 2 is a perspective view showing a fixing structure to a seat frame according to an embodiment of the airbag apparatus of the present invention.

3 is an exploded perspective view of the airbag apparatus showing the fixing structure shown in FIG. 2 in more detail.

FIG. 4 is a perspective view showing the overall structure of the airbag during inflation and deployment.

FIG. 5 is a plan view showing the second panel side force representing the overall structure of the bag.

Explanation of symbols

[0053] 2 crew members

10 Airbag device

11 Airbag

11A 1st bag

11B 2nd bag S side (first side, second side) inflator

A First panel

B Second panel

Sewing joint

Sealing material

1st chamber

Second chamber

Communication path

Deployment derivation section

Claims

The scope of the claims

[1] An airbag that inflates and deploys above an occupant's head, and includes a side portion that inflates and deploys toward the occupant's head.

[2] An air bag comprising a first panel disposed on the passenger side and a second panel disposed on the opposite side of the passenger, the first and second panels being joined together,

A first chamber provided between the joined first panel and the second panel and provided upstream of the flow direction of the pressurized fluid supplied to the inflation tank; A first bag having side portions that expand and deploy to

A second chamber provided between the joined first panel and the second panel and provided downstream in the flow direction of the pressure fluid supplied from the inflator, above the head of the occupant With a second bag that inflates and expands

An air bag characterized by comprising:

[3] In the airbag according to claim 1 or 2,

The side portion includes a first side portion that is inflated and deployed on one side of the occupant's head and a second side portion that is inflated and deployed on the other side of the occupant's head when the airbag is inflated and deployed. An air bag characterized by that.

[4] The airbag according to claim 3,

The airbag according to claim 1, wherein the first side portion and the second side portion each have a size capable of covering a side of the head of the occupant.

[5] In the airbag according to claims 2 to 4 and displacement force 1 described above,

The airbag according to claim 1, wherein the side portion has a deployment lead-out portion for leading the second bag to the upper side of the occupant's head when the first bag is inflated and deployed.

[6] The airbag according to any one of claims 1 to 5, and

And an inflator for supplying a pressure fluid for inflating and deploying the airbag.