WO2019244767A1

WO2019244767A1 - Airbag device

Info

Publication number: WO2019244767A1
Application number: PCT/JP2019/023464
Authority: WO
Inventors: 坂本　浩; 匡俊横田; 岡田　典久; 伸一竹内
Original assignee: ＪｏｙｓｏｎＳａｆｅｔｙＳｙｓｔｅｍｓＪａｐａｎ株式会社
Priority date: 2018-06-22
Filing date: 2019-06-13
Publication date: 2019-12-26
Also published as: JP7104569B2; JP2019218014A

Abstract

An airbag device comprising: an inflator (30); an airbag (20) which is expanded by means of a gas supplied from the inflator (30); and an accommodating part (40) which is arranged in the seat back (62) of a seat, and which accommodates the airbag (20) when the airbag is not released, prior to the supply of gas by the inflator (30). The airbag (20) comprises: a pair of support points (41) which are provided at the respective sides, in the widthwise direction, of the seat (60), further to the forward side of the seat (60) than the accommodating part (40); and tab members (42) which connect the airbag and the pair of support points (41).

Description

Airbag device

The present disclosure relates to an airbag device.

2. Description of the Related Art Conventionally, a method has been proposed in which an airbag is deployed from a headrest or a seatback of a vehicle seat, and the head of an occupant sitting on the seat is protected in all directions by the airbag (for example, Patent Document 1). .

JP 2017-100688 A

However, in the configuration in which the airbag is deployed from the headrest or the seat back, it is necessary to cross the headrest or the occupant's head in order to deploy the airbag forward of the head, and the airbag may not be deployed properly.

The present disclosure aims to provide an airbag device that can stably deploy an airbag.

An airbag device according to one aspect of an embodiment of the present invention is disposed on an inflator, an airbag that is deployed by gas supplied from the inflator, and a seatback or a headrest of a seat, and gas is supplied by the inflator. A housing portion for housing the airbag in a non-operating state before; a rear inflatable portion that is deployed on a back side of a seat; and a pair of front airbag portions that extend forward from both sides in a seat width direction of the rear inflatable portion. And a pair of front inflating portions extending from the pair of side inflating portions to the center side and connected to each other at the center to cover the front of the occupant. A pair of support points provided on both sides of the seat and in the width direction of the seat; and a connecting member that connects the airbag and the pair of support points.

According to the present disclosure, it is possible to provide an airbag device capable of stably deploying an airbag.

FIG. 2 is a perspective view of the airbag device according to the embodiment when the airbag is deployed. It is a side view of the airbag apparatus shown in FIG. It is a front view of the airbag apparatus shown in FIG. FIG. 4 is a schematic diagram showing a schematic configuration of the airbag in FIGS. 1 to 3 in a plan view. FIG. 3 is a side view of the airbag device according to the embodiment when the airbag is stored. FIG. 6 is an enlarged view of the vicinity of a storage unit in FIG. 5. It is a perspective view which shows the installation structure of the accommodation part in the frame inside a seatback. FIG. 8 is an exploded perspective view of the frame and the housing shown in FIG. 7. It is a figure showing the 1st stage of the deployment procedure of the airbag by the airbag device concerning an embodiment. It is a figure showing the 2nd stage of the deployment procedure of the airbag by the airbag device concerning an embodiment. It is a figure showing the 3rd step of the deployment procedure of the airbag by the airbag device concerning an embodiment. It is a figure showing the 4th step of the deployment procedure of the airbag by the airbag device concerning an embodiment. It is a figure showing the 5th step of the deployment procedure of the airbag by the airbag device concerning an embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description will be omitted.

In the following description, the x, y, and z directions shown in each drawing are directions perpendicular to each other. The x direction is the front-back direction of the vehicle, the x positive direction side is the vehicle front, and the x negative direction side is the vehicle rear. The y direction is the width direction of the vehicle, the y positive direction side is the vehicle right side, and the y negative direction side is the vehicle left side. The z direction is the vertical direction, with the z positive direction side being upward and the z negative direction side being downward.

構成 The configuration of the airbag device 10 according to the embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of the airbag device 10 according to the embodiment when the airbag is deployed. FIG. 2 is a side view of the airbag device 10 shown in FIG. FIG. 3 is a front view of the airbag device 10 shown in FIG. FIG. 4 is a schematic diagram showing a schematic configuration of the airbag 20 in FIGS. 1 to 3 in plan view.

エア As shown in FIGS. 1 to 3, the airbag device 10 is mounted on a seat 60 of a vehicle. The seat 60 includes a seat portion 61 on which the occupant D sits, a seat back 62 having a lower end connected to a rear end of the seat portion 61, and a headrest 63 provided at an upper end of the seat back 62. A frame 64 is arranged inside the seat back 62. Although not shown in FIGS. 1 to 3, the seat 60 is also provided with general components mounted on the vehicle seat, such as a seat belt, a tongue, a buckle, and a retractor.

The airbag device 10 protects the occupant D from collision in all directions, front, rear, right and left, by the deployed airbag 20 in a state where the occupant D is seated on the seat 60. The airbag 20 is formed in a tubular shape that covers the headrest 63 of the seat 60 and the periphery of the head H of the occupant D seated on the seat 60 and is open at the top and bottom.

FIGS. 1 to 4 show a state in which a dummy doll for a collision test is seated on the seat portion 61 of the seat 60 as a model of the occupant D to be protected. The dummy doll is, for example, WorldSID (International Unified Side Impact Dummy: World @ Side @ Impact @ Dummy) AM50 (50th percentile of American adult males). The dummy doll is seated in a standard sitting posture (regular state) determined by the collision test method, and the seat 60 is located at a reference setting position corresponding to the sitting posture. The head H of the dummy doll faces the front of the vehicle (front of the seat).

The airbag device 10 includes an airbag 20, an inflator 30, and a housing 40. The inflator 30 and the housing section 40 will be described later with reference to FIGS.

The airbag 20 is configured as a tubular integral bag that is inflated and deployed so as to cover the head H of the occupant D from the front and both left and right sides. More specifically, the airbag 20 has a rear inflation portion 21, a pair of

side inflation portions

22A and 22B, and a pair of

front inflation portions

23A and 23B.

The rear inflatable portion 21 is deployed at a position behind the headrest 63 so as to face the headrest 63 and the seat back 62 as shown in FIGS. As shown in FIG. 4, the rear inflatable portion 21 is connected to the rear end of the pair of lateral

inflatable portions

22A and 22B via

rear bent portions

74A and 74B at both ends in the y direction. . The

rear bent portions

74A and 74B are bent at substantially right angles to the x positive direction side to extend the pair of

side expanding portions

22A and 22B forward from the rear expanding portion 21 as shown in FIGS. .

The pair of

lateral expansion portions

22A and 22B are respectively disposed on the left and right sides of the head H of the occupant D. The pair of

lateral expansion portions

22A and 22B are formed such that the front side has a longer dimension in the vertical direction than the rear side and is longer than the lower side. The length of the front side is substantially the same as the vertical dimension of the

front expansion portions

23A and 23B.

The pair of side

inflatable portions

22A, 22B are connected to the pair of front

inflatable portions

23A, 23B via

front bent portions

75A, 75B at front end portions. The

front bent portions

75A and 75B are bent at a substantially right angle toward the center in the y direction, and cover a pair of

front expanding portions

23A and 23B in front of the head H of the occupant D as shown in FIGS. To the center side. The pair of front

inflatable portions

23A and 23B are joined to each other along the z-direction at a substantially central position in the y-direction by a central joining portion 76, whereby the front

inflatable portions

23A and 23B are arranged in front of the head H of the occupant D, The front of the portion H can be completely closed. Further, the pair of front

inflatable portions

23A and 23B are formed in a substantially rectangular shape when viewed from the x direction, and have dimensions in the width direction and the vertical direction that can cover the entire front surface of the head H of the occupant D. ing.

As described above, the airbag 20 is formed by joining the both ends of the integral bag body by the joining seam by the central joint portion 76, so that the donut which surrounds the head H of the occupant D in all directions in the front-rear direction and the left-right direction. It is formed in a shape.

In addition, the front

inflatable portions

23A and 23B are recessed forward in the y-direction substantially central portions of the front

inflatable portions

23A and 23B when viewed from the occupant D side by arranging the center joint portion 76 at the center in the width direction. A front recess 27 is formed. The front recess 27 extends in the z-direction over the area of the central joint 76. The presence of the front recess 27 on the inner surfaces of the front

inflatable portions

23A and 23B increases the contact surface of the inner surfaces of the front

inflatable portions

23A and 23B with the head H, and also makes the opposing angles diversified. The direction in which the airbag 20 can absorb the impact on the side can be increased, and the occupant D can be protected from a collision in a wider direction.

上端 The upper ends of the front

inflatable portions

23A and 23B may be located above the top of the head H of the occupant D. In addition, the lower end position is provided so as to cover the chest of the occupant D in the present embodiment, but may be a position that can cover at least the head H of the occupant D. It may be shorter than the dimensions of the illustrated embodiment.

よう As shown in FIGS. 1 to 4, the pair of front

inflatable portions

23A and 23B have restraining

portions

24A and 24B and energy absorbing (Energy Absorption: EA)

portions

25A and 25B. The constraining

portions

24A and 24B bend and extend to the center side from the pair of

lateral expansion portions

22A and 22B, respectively. The

EA portions

25A, 25B are connected to the center-side ends of the restraining

portions

24A, 24B, and extend from the center portion to the front

bent portions

75A, 75B on both sides in the y direction, thereby forming the restraining

portions

24A, 24B. It is arranged to overlap on the front side. Further, the outer ends of the

EA portions

25A, 25B are joined to the pair of lateral

inflatable portions

22A, 22B by tip

joint portions

77A, 77B provided at the front end of the pair of lateral

inflatable portions

22A, 22B. You. As a result, the pair of

EA portions

25A, 25B are arranged in the y direction in front of the restraining

portions

24A, 24B, and are arranged in parallel with the restraining

portions

24A, 24B, and the restraining

portions

24A, 24B and the EA portion are arranged. 25A and 25B are arranged in front of the head H of the occupant D in a double manner.

The

restraint portions

24A and 24B of the front

inflatable portions

23A and 23B are arranged in front of the head H of the occupant D and function to protect the front side of the head H in the event of a collision. The

EA portions

25A and 25B limit the load applied to the

restraint portions

24A and 24B of the airbag 20 when a secondary collision such as the collision of the airbag 20 with a handle or the like in front of the seat is applied to the occupant. It functions to absorb and mitigate energy.

In the airbag 20, the inflator 30 is attached to the inflator insertion port 26 of the rear inflating portion 21, and gas from the inflator 30 is supplied. In the airbag 20, a gas flow path is formed in the order from the rear inflating portion 21 to one side inflating portion 22A, one restricting portion 24A, and one EA portion 25A. A gas flow path is formed in the order of the inflating portion 22B, the other restraining portion 24B, and the other EA portion 25B.

収納 The storage state of the airbag 20 will be described with reference to FIGS. FIG. 5 is a side view of the airbag device 10 according to the embodiment when the airbag is stored. FIG. 6 is an enlarged view of the vicinity of the storage section 40 in FIG. FIG. 7 is a perspective view showing an installation structure of the storage section 40 in the frame 64 inside the seat back 62. FIG. 8 is an exploded perspective view of the frame 64 and the housing section 40 shown in FIG. The airbag 20 is stored in the storage section 40 in a folded state. The accommodation section 40 is attached to a frame 64 inside the seat back 62 and stored in the seat back 62, for example.

(4) The accommodation section 40 is disposed so as to open upward along the direction in which the seat back 62 extends. The inflator 30 is disposed below the storage section 40, and is inserted into the inflator insertion opening 26 of the airbag 20 from below the storage section. The inflator insertion opening 26 penetrates, for example, the bottom wall of the housing section 40 and advances downward, and the inflator 30 is inserted.

The inflator 30 is, for example, of a combustion type or a cold gas type, and its operation is controlled by a control device such as a vehicle ECU. The inflator 30 supplies gas generated by the operation into the airbag 20 through the inflator insertion port 26. In the present embodiment, the inflator 30 is, for example, a cylinder-type inflator, and is arranged with the height direction of the seat as a longitudinal direction.

The inflator 30 is fixed to a bracket 31 fixed to a frame 64 by using a band 32, for example, as shown in FIG. In the present embodiment, two inflator insertion ports 26 are provided in the rear inflatable portion 21 and two inflators 30 are installed as shown in FIG. 4, but the number of inflators 30 may be one or two. A larger number may be used.

(4) The accommodation section 40 is made of, for example, resin and is formed in a box shape, and has an upper side opened. The folded airbag 20 is accommodated in the box-shaped internal space of the accommodation section 40. The storage section 40 is stored above the seat back 62 when the airbag device 10 is not operated. When the airbag device 10 is operated, the surface of the seat back 62 is broken by the inflation pressure of the airbag 20, so that the airbag 20 can be inflated and deployed to the outside.

As shown in FIG. 6, the airbag 20 housed in the housing section 40 is configured to include a roll folded section 71 folded in a roll shape and a bellows folded section 72 folded in a bellows shape. . The roll folded portion 71 is folded into a roll so as to wind upward from the front

inflatable portions

23A, 23B side to the upper surface side of the lateral

inflatable portions

22A, 22B in the deployed state of the airbag 20. The seat is folded so that it can be easily deployed toward the front of the seat when inflated and deployed. The bellows folded portion 72 is accommodated in a position above the roll folded portion 71 of the accommodation portion 40 in a state where the rear inflating portion 21 in the deployed state of the airbag 20 is folded in a bellows shape. It is easy to deploy before the part 71.

The inflator insertion opening 26 of the airbag 20 is not included in the roll folded portion 71 and the bellows folded portion 72, but is disposed below the roll folded portion 71, and the inflator 30 is inserted. In FIG. 6, for convenience of schematically showing the stored state of the roll folded portion 71 and the bellows folded portion 72, the roll folded portion 71 and the bellows folded portion 72 are illustrated as being branched from the inflator insertion opening 26. However, since the inflator insertion port 26 is provided in the rear inflatable portion 21 as described above, it is actually connected only to the bellows folded portion 72. For this reason, the roll folding part 71 and the bellows folding part 72 can supply gas to the bellows folding part 72 above first.

The roll folding section 71 supplies the gas in the order of the

side inflating sections

22A and 22B and the

front inflating sections

23A and 23B so that the

side inflating sections

22A and 22B are positioned above the head H of the occupant D. And the front

inflatable portions

23A and 23B are inflated and deployed at a position forward of the head H of the occupant D.

In addition, in the present embodiment, there is a pair of arm members 43 extending from both sides in the width direction of the housing section 40 to the vehicle front side. The arm member 43 is provided integrally with the housing portion 40 at both ends in the y direction of the housing portion 40 as shown in FIGS. 7 and 8, for example, and extends to the front side of the vehicle through the outside in the width direction of the frame 64. ing. Note that the arm member 43 may be provided as a separate member from the housing section 40 and connected to another member such as the frame 64. The extending direction of the arm member 43 is, for example, orthogonal to the extending direction of the frame 64 and is obliquely upward.

先端 A pair of support points 41 are provided at the distal ends of the pair of arm members 43, respectively. In other words, the pair of support points 41 are provided on the front side of the seat 60 with respect to the accommodation section 40 and on both sides in the width direction of the seat 60. Further, in the present embodiment, the support points 41 are arranged on the vehicle front side with respect to the frame 64.

In the embodiment, in particular, the airbag 20 has a pair of tab members 42 (connecting members) for connecting the roll folded portion 71 and the support points 41 during storage. The tab member 42 is a non-inflated panel formed of the same material as the airbag 20. One end of the tab member 42 is connected to the support point 41 so as to be rotatable around the y-axis, and the other end is connected to the roll folding section 71. As shown in FIG. 2, the other end is connected to lower portions of the side

inflatable portions

22A and 22B of the airbag 20 when the airbag 20 is deployed.

The tab member 42 may be any connecting member that can connect the airbag 20 and the support point 41, and may be formed of a material different from that of the airbag 20, or may be one that inflates with the inflation of the airbag 20. Good. Further, the tab member 42 may be an elongated band shape having an extending direction between one end connected to the support point 41 and the other end connected to the airbag 20, and instead of the tab member 42, It may be replaced with another band-shaped element such as a string, a band, a belt, or a strap.

Next, a procedure for deploying the airbag 20 by the airbag device 10 will be described with reference to FIGS. 9 to 13 are diagrams showing first to fifth stages of the procedure of deploying the airbag 20 by the airbag device 10 according to the embodiment, respectively.

First, as shown in FIGS. 5 and 6, in normal times (when the airbag device 10 is not operated), the airbag 20 is folded and stored in the storage section 40 in the seed bag. Then, when a shock equal to or more than a predetermined threshold is received due to a vehicle collision or the like, the inflator 30 is operated by the ECU, and gas is started to be supplied from the inflator 30 to the airbag 20.

In the first stage shown in FIG. 9, when the gas starts to be supplied from the inflator 30, the gas is first supplied to the upper bellows folded portion 72 and starts to expand. The bellows folded portion 72 breaks the surface of the seat back 62 while developing the bellows shape, advances to the seat rear side, and starts to expand upward and to the seat rear side.

では In the second stage shown in FIG. 10, when the deployment of the bellows folded portion 72 is completed, the rear expanding portion 21 is formed. Thereafter, when the gas starts to be supplied to the roll folding section 71, the roll folding section 71 starts to expand from the state of being folded in the roll shape so as to be developed. At this time, the roll folding portion 71 receives a reaction force from the rear expanding portion 21 deployed on the seat rear side to the front and upper sides of the vehicle due to the expanding force generated by the expansion. By this reaction force, the roll folding part 71 is deployed so as to get over the headrest 63 diagonally upward. That is, the rear inflation portion 21 which is first developed functions as a base for promoting the deployment direction of the roll folding portion 71 forward. Moreover, since the roll folding part 71 is wound upward, as described above, it is rotated downward and deployed.

では In the third stage shown in FIG. 11, the expansion of the roll folding part 71 proceeds, and first, the

lateral expansion parts

22A and 22B begin to expand. The

lateral expansion portions

22A and 22B expand toward the front of the vehicle and upward. At this time, the tab member 42 attached to the lower part of the side

inflatable portions

22A, 22B expands between the airbag 20 and the support point 41 as the inflates of the side

inflatable portions

22A, 22B progress. Generate tension. With this tension, a new pulling force is applied to the airbag 20 toward the support point 41 side (downward in this state), so that the deployment direction of the airbag 20 is changed from “the vehicle front side and the upper side” to the vehicle front side. Switch to. As a result, the remaining portion of the roll folded portion 71 rotates toward the vehicle front side around the support point 41 located on the vehicle front side with respect to the housing portion 40 and the rear inflatable portion 21, and the deployment to the vehicle front side is promoted. You.

As described above, the support point 41 is disposed on the vehicle front side of the seat back 62 of the seat 60. For this reason, the timing at which the deployment direction of the airbag 20 is switched from “vehicle front side and upper side” to the vehicle front side can be delayed, and the deployment direction can be changed after the side

inflatable portions

22A and 22B are fully deployed. As a result, the airbag 20 can be easily deployed beyond the head H of the occupant D. That is, it is preferable that the position of the support point 41 be located as far as possible on the front side of the vehicle.

In the fourth stage shown in FIG. 12, first, the lateral

inflatable portions

22A and 22B are formed from the roll folding portion 71 to cover the side of the head H of the occupant D. At this time, the remaining portion of the roll folded portion 71 has advanced forward from the head H, and the

top portions

29A and 29B of the side

inflatable portions

22A and 22B abut against the ceiling, and the upward force due to the reaction force from the ceiling. The deployment direction is switched downward and begins to deploy downward from the vehicle ceiling.

In the fifth stage shown in FIG. 13, the front

inflated portions

23A and 23B are formed from the roll folded portion 71, and also cover the front portion of the head H of the occupant D, whereby the omnidirectional direction of the occupant D in the front, rear, left, and right directions is changed. An overlying airbag 20 is formed. At this time, since the connection position between the tab member 42 and the airbag 20 is located forward of the support point 41, the tab member 42 extends, for example, along the upper end of the seat back 62 of the seat 60 or the surface of the upper front surface in the front-rear direction. The airbag 20 has advanced outward from the seat back 62 through a slit or the like provided at the front end, and the advanced position has shifted to the front side with the deployment of the airbag 20.

効果 The effects of the airbag device 10 according to the present embodiment will be described.

The airbag device 10 of the present embodiment is disposed on the inflator 30, the airbag 20 that is deployed by the gas supplied from the inflator 30, and the seat back 62 of the seat 60, and the airbag 20 before the gas is supplied by the inflator 30. A housing section 40 for housing the airbag 20 when activated. The airbag 20 includes a rear inflatable portion 21 deployed on the back side of the seat 60, a pair of side

inflatable portions

22A and 22B extending forward from both sides of the rear inflatable portion 21 in the seat width direction, and a pair of side inflatable portions 22A. , 22B extending to the center side and connected to each other at the center and covering the front of the occupant D, and has a pair of front

inflatable portions

23A, 23B. It has a pair of support points 41 provided on both sides and a tab member 42 connecting the airbag 20 and the pair of support points 41.

With this configuration, when the airbag 20 is inflated and deployed when the airbag device 10 is operated, the tab member 42 connecting the airbag 20 and the support point 41 causes the airbag 20 to move in the direction toward the support point 41. A force, that is, a force for rotating the airbag 20 forward about the support point 41 can be applied to the airbag 20. In addition, since the pair of support points 41 are disposed on the front side of the seat 60 with respect to the accommodation section 40 and the seat back 62, the center of rotation of the airbag 20 can be more forward, and the airbag 20 can be moved forward. It can be more easily developed. Thereby, the airbag device 10 of the present embodiment can deploy the airbag 20 so as to reliably exceed the headrest 63 and the head H of the occupant D, and can deploy the airbag 20 stably.

As described with reference to FIGS. 11 and 12, the side

inflatable portions

22A and 22B extend from the rear side to the front side of the head H of the occupant D when the airbag 20 is deployed. During deployment of the side

inflatable portions

22A and 22B, it is preferable that the undeployed portion at the tip can move forward as soon as possible beyond the head H of the occupant D. In the present embodiment, since the tab member 42 is connected to the side

inflatable portions

22A and 22B of the airbag 20, the tab member 42 rotates the airbag 20 forward during deployment of the side

inflatable portions

22A and 22B. The movement can be promoted, and the undeployed portion of the airbag 20 can be easily moved to the front side beyond the headrest 63 and the head H of the occupant D. Thus, the deployment of the airbag 20 can be further stabilized.

Further, in the present embodiment, since the tab member 42 is a non-inflated panel formed of the same material as the airbag 20, the tab member 42 can be formed integrally with the airbag 20. 20 can be improved in the accuracy of the connection position. Further, since the tab member 42 is made of the same material as the airbag 20, the durability of the tab member 42 can be improved as well as the airbag 20.

Further, in the present embodiment, there is a pair of arm members 43 extending from both sides in the width direction of the accommodating portion 40 to the front side of the vehicle, and the arm members 43 have front end portions on the front side with respect to the frame 64 in the seat back 62. The pair of support points 41 are provided at the distal ends of the pair of arm members 43, respectively. Thus, the support point 41 can be reliably arranged on the front side of the vehicle, and the position of the support point 41 can be easily adjusted, so that the deployment of the airbag 20 can be further stabilized.

The embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately change the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. The components included in the specific examples described above and the arrangement, conditions, shapes, and the like of the components are not limited to those illustrated, and can be appropriately changed. The elements included in each of the specific examples described above can be appropriately changed in combination as long as there is no technical contradiction.

In the above-described embodiment, the configuration in which the storage unit 40 of the airbag device 10 is stored in the seatback 62 has been described, but the configuration in which the storage unit 40 is stored in the headrest 63 may be used.

In the above-described embodiment, the airbag 20 has a structure in which a plurality of panels are sewn and integrally formed. However, the airbag 20 may be a so-called one-piece woven (OPW) type.

In the above embodiment, the support point 41 is provided on the arm member 43 built in the seat back 62, that is, the configuration in which the position of the support point 41 is set in the seat back 62 is exemplified. Since the position is preferably located on the vehicle front side as much as possible, a configuration in which the position of the support point 41 is located on the vehicle front side with respect to the seat back 62 may be employed. For example, as the airbag 20 is inflated, the distal end of the arm member 43 projects from the inside of the seat back 62 toward the front of the vehicle, so that the support point 41 can be disposed on the front side of the vehicle with respect to the seat back 62. Further, the position of the support point 41 may be moved stepwise according to the stage of deployment of the airbag 20, and may be arranged at an optimal position in each stage.

In the above-described embodiment, the configuration in which the tab member 42 is connected to the side

inflatable portions

22A and 22B of the airbag 20 is illustrated. However, the tab member 42 may be connected to the front

inflatable portions

23A and 23B of the airbag 20. Good.

This international application claims priority based on Japanese Patent Application No. 2018-119022 filed on June 22, 2018, and the entire contents of 2018-119022 are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 10 Airbag apparatus 20 Airbag 21

Rear inflation part

22A, 22B

Side inflation part

23A, 23B

Front inflation part

24A,

24B Restraining part

25A, 25B EA part 30 Inflator 40 Housing part 41 Support point 42 Tab member (connecting member)
43 Arm member 60 Seat 61 Seat part 62 Seat back 63 Headrest 64 Frame D Occupant H Head

Claims

An inflator,
An airbag deployed by gas supplied from the inflator,
A storage portion that is disposed on a seat back or a headrest of a seat and stores the airbag when not operated before gas is supplied by the inflator;
With
The airbag,
A rear inflatable portion that extends to the back side of the seat, a pair of side inflatable portions that extend forward from both sides of the rear inflatable portion in the seat width direction, and are interconnected at the center extending from the pair of side inflatable portions toward the center. And a pair of front inflatable portions that cover the front of the occupant,
A pair of support points provided on the front side of the seat from the storage portion, and on both sides in the width direction of the seat,
A connecting member that connects the airbag and the pair of support points,
Having,
Airbag device.
The connection member is connected to the side inflation portion or the front inflation portion of the airbag,
The airbag device according to claim 1.
The connection member is a non-inflating tab member formed of the same material as the airbag,
The airbag device according to claim 1.
It has a pair of arm members extending from both sides in the width direction of the housing portion to the front side of the vehicle,
The arm member has a tip portion on the front side of a frame in the seat back,
The pair of support points are provided at the distal ends of the pair of arm members, respectively.
The airbag device according to claim 1.