WO2012124548A1

WO2012124548A1 - Airbag device

Info

Publication number: WO2012124548A1
Application number: PCT/JP2012/055700
Authority: WO
Inventors: 昭大舞田; 雄太南; 美和松岡
Original assignee: 芦森工業株式会社
Priority date: 2011-03-11
Filing date: 2012-03-06
Publication date: 2012-09-20
Also published as: JP2012188050A

Abstract

The present invention prevents passengers from being thrown out of a vehicle while also preventing curtain-airbag-caused damage to front pillar trim. An airbag device (1) is provided with an airbag (10) and an inflator (2). Said airbag (10) is provided along the top of a side wall (91) all the way to a front pillar (93). The inflator (2) produces a gas to inflate the airbag (10). The airbag (10) has an upper inflation part (42), a lower inflation part (43), and a front gas chamber (3). When the airbag (10) inflates, the upper inflation part (42) overlaps the front pillar (93) and the lower inflation part (43) overlaps door trim (95A). The front gas chamber (3) expands into the passenger compartment from inside the front pillar trim (93A) and inflates due to gas entering from a bottom gas inlet (3A) only.

Description

Airbag device

The present invention relates to an airbag device for inflating and deploying an airbag in a curtain shape in a vehicle and protecting an occupant with the airbag.

¡Airbag devices are used to protect passengers in the event of a vehicle emergency or collision. For example, the airbag device is attached along an upper portion in the vehicle, and inflates and deploys the airbag along the side wall of the vehicle. The airbag is deployed in a curtain shape to receive and protect the occupant's head. As this airbag device, there is conventionally known an occupant protection device that curbs the lower edge of an airbag between a front pillar and a rear pillar to suppress the movement of the head (see Patent Document 1).

However, in this conventional occupant protection device, the airbag expands from the inside of the front pillar trim to the outside while inflating. Accordingly, the front pillar trim may be damaged by an impact received from the airbag. Further, since the airbag is deployed in the opening of the window portion, the airbag tends to move easily when an occupant is received. Therefore, it is difficult to suppress the deformation of the airbag in the vehicle outward direction, and there is room for improvement from the viewpoint of receiving the occupant more reliably. At the same time, it is also required to more reliably suppress the occupant from being released out of the vehicle by the airbag.

On the other hand, conventionally, there is known an airbag device that is provided with a sub-inflation portion that does not allow gas to flow at the initial stage of deployment, and that quickly deploys the airbag to a predetermined position that protects an occupant (see Patent Document 2).

However, in this conventional airbag device, after the occupant comes into contact with the airbag, the sub-inflation part is inflated by the inflow of gas. Therefore, it is difficult to receive the occupant at the sub-inflation part, and there is a possibility that the area for receiving the occupant of the airbag becomes narrow. Moreover, since an airbag is easy to deform | transform when a passenger | crew contacts an airbag, there exists a possibility that the performance which suppresses the passenger | crew's discharge | release outside a vehicle which an airbag has may arise. In particular, when the occupant comes into contact with the sub-expansion part before being inflated, the occupant cannot be sufficiently restrained, and the amount of movement of the occupant in the vehicle outward direction may increase.

Japanese Patent Laid-Open No. 11-48901 JP 2010-83240 A

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to reliably receive an occupant with an airbag that is inflated and deployed in a curtain shape and to improve the performance of the occupant to suppress the release of the occupant outside the vehicle. That is. Another object is to prevent the front pillar trim from being damaged when the airbag is inflated and deployed.

The present invention relates to an airbag device including an airbag disposed up to the front pillar along the upper side of the vehicle interior side wall, and an inflator that generates gas and inflates and deploys the airbag in a curtain shape. The front air chamber that extends from the front pillar trim provided in the front pillar into the vehicle interior, the upper inflating portion that overlaps the front pillar when the airbag is inflated, and the front door of the vehicle when the air bag is inflated An air bag device that has a lower inflating portion that overlaps with a door trim, a front air chamber has a gas inlet provided at a lower end, and expands when gas flows only from the gas inlet It is.

According to the present invention, an occupant can be reliably received by an airbag that inflates and deploys in a curtain shape. Moreover, the performance which suppresses the passenger | crew's discharge | release outside a vehicle which an airbag has can be improved. It is also possible to prevent the front pillar trim from being damaged when the airbag is inflated and deployed.

It is a figure which shows the airbag apparatus of this embodiment. It is a figure which shows a deformation | transformation member. It is a top view which shows the expand | deployed airbag. It is sectional drawing which shows the airbag to expand | deploy. It is sectional drawing which shows the airbag to expand | deploy. It is a figure which shows the airbag expanded and deployed in the vehicle. It is a figure which expands and shows the upper expansion part of an airbag. It is a figure which expands and shows the lower expansion part of an airbag. It is a figure which shows the airbag which received the passenger | crew. It is a figure which shows the airbag which received the passenger | crew. It is a figure which shows the deformation member of other embodiment.

An embodiment of an airbag device of the present invention will be described with reference to the drawings.
The airbag apparatus of this embodiment is a curtain airbag apparatus that deploys an airbag (curtain airbag) in a curtain shape in a vehicle. The airbag device is mounted in a vehicle and receives and protects an occupant with an airbag that is inflated and deployed.

FIG. 1 is a view showing an airbag apparatus according to the present embodiment. In FIG. 1, the airbag apparatus mounted in the vehicle is shown as viewed from the passenger compartment. Further, the side wall of the vehicle and the airbag device are schematically shown with the rear side of the vehicle omitted and viewed from the vehicle width direction. The airbag device is shown through the inner surface of the vehicle.
In the present invention, the front and rear in the vehicle are simply referred to as front and rear, and the front-rear direction in the vehicle is simply referred to as front-rear direction. The upper and lower directions in the vehicle are simply referred to as the upper and lower directions, and the vertical direction in the vehicle is simply referred to as the vertical direction.

As shown in the drawing, the vehicle 90 includes an upper roof rail 92, a front front pillar (A pillar) 93, an intermediate center pillar (B pillar) 94 in the front-rear direction, and a rear rear pillar ( C pillar) (not shown). Further, the vehicle 90 includes a front front door 95 and a rear rear door 96 on the side wall 91. The front door 95 is a door provided in the forefront of the vehicle 90 and is located below the front pillar 93. The rear door 96 is a door provided at the rear of the vehicle 90 and is located below the rear pillar. A part of the trim or head lining 92 A is attached to each part of the side wall 91. The trim constitutes a surface member in the vehicle 90. The headlining 92A covers the roof (not shown) and the roof rail 92. The headlining 92A is generally formed of a material that is less rigid than the material of the trim and easily deforms. Within the side wall 91, the

window parts

97 and 98 provided in the

doors

95 and 96 open and close.

The airbag device 1 includes an airbag 10, an inflator 2, and a deformable deformable member 50. The airbag 10 is folded in such a manner that it can be inflated and deployed, and attached to the vehicle 90. At that time, for example, the airbag 10 is folded in a bellows shape from a lower edge (referred to as a lower edge) toward an upper edge (referred to as an upper edge). Alternatively, the airbag 10 is rolled by being wound from the lower edge toward the upper edge and on the side wall 91 side. The airbag 10 is disposed along the upper portion (upper edge) of the side wall 91 in the vehicle compartment in a state where the airbag 10 is folded into an elongated shape. The airbag 10 is attached to the roof rail 92 along the front-rear direction, and is disposed from the rear pillar to the front pillar 93.

The folded airbag 10 is disposed between the vehicle body and the trim and between the vehicle body and the headlining 92A. The airbag 10 is fixed to the vehicle body in the trim and the headlining 92A by a fixing means (not shown). The front portion 11 of the airbag 10 is attached to the front pillar 93. The front portion 11 is disposed between the vehicle body and the front pillar trim 93A in the front pillar 93 (within the front pillar trim 93A).

The inflator 2 is a cylinder-type gas generator and has a gas outlet at one end in the longitudinal direction. The inflator 2 is disposed above the center pillar 94 and attached to the roof rail 92. The inflator 2 is fixed to the vehicle body in the headlining 92A by a fixing means (not shown). The inflator 2 generates gas and supplies the gas to the airbag 10 at the time of vehicle emergency or impact detection. With this gas, the airbag 10 is inflated and deployed in a curtain shape from the upper part of the side wall 91 downward.

The deformation member 50 is a variable member that is deformed by an external force. The deformable member 50 is made of metal and is plastically deformed when pressed by the airbag 10. The deformable member 50 is a bracket that attaches the folded airbag 10 to the vehicle 90. The deformable member 50 is disposed around the airbag 10 in the front pillar trim 93A. At that time, the deformable member 50 is disposed between the airbag 10 and the front pillar trim 93 A so as to surround the airbag 10. The deformable member 50 is fixed to the vehicle body and holds the airbag 10.

FIG. 2 shows the deformable member 50 in an enlarged manner. FIG. 2A is a front view of the deformable member 50 corresponding to FIG. 2B is a side view of the deformable member 50 as viewed from the direction of arrow S1 in FIG. 2A. FIG. 2C is a perspective view of the deformable member 50 viewed from the direction of arrow S2 in FIG. 2A. 2D is a perspective view of the deformable member 50 viewed from the direction of arrow S3 in FIG. 2A.
The deformation member 50 has a concave storage 51 as shown in the figure. The storage 51 is formed by bending a metal plate at a plurality of locations, and stores the airbag 10 (shown by dotted lines in FIGS. 2A and 2B).

The deformable member 50 has first to fourth surfaces 55 to 58 that are continuous with corner portions 52 to 54 interposed therebetween. The deformable member 50 is formed so that the first to fourth surfaces 55 to 58 intersect at the corners 52 to 54. The first surface 55 is an attachment surface protruding upward, and is attached to the front pillar 93 by a bolt (not shown) inserted into the attachment hole 55A. The second to fourth surfaces 56 to 58 constitute a main body portion of the deformation member 50. The second to fourth surfaces 56 to 58 are section screens for partitioning the storage portion 51, and the airbag 10 is stored in the internal storage portion 51. The boundaries (corner portions 53 and 54) between the second to fourth surfaces 56 to 58 are gently curved. The deformation member 50 is formed in a symmetrical shape with respect to the center plane CF passing through the attachment hole 55A.

The fourth surface 58 is a surface (referred to as a movable surface) that moves larger than the other surfaces 55 to 57 when the deformation member 50 is deformed. The movable surface 58 is disposed in the deployment direction F (downward) of the folded airbag 10 in the front pillar trim 93A. Further, the movable surface 58 is disposed to face the lower surface of the airbag 10 so as to block the deployment direction F of the airbag 10. The movable surface 58 is pushed by the airbag 10 to be deployed and displaced in the deployment direction F of the airbag 10 (arrow T in FIG. 2). Thereby, the movable surface 58 moves to the outside of the deployment direction F of the airbag 10 and opens the deployment direction F. In FIG. 2B, the movable surface 58 with the development direction F opened is indicated by a dotted line.

The movable surface 58 has a base end portion 58A located at one end and a free end portion 58B located at the other end. The base end portion 58 A is a corner portion 54 provided between the third surface 57 and the movable surface 58. When the movable surface 58 is pushed by the airbag 10, the base end portion 58 A is bent and deformed in the deployment direction F of the airbag 10 to displace the movable surface 58 in the deployment direction F (arrow T). The free end portion 58B is displaced together with the movable surface 58 to push open the front pillar trim 93A. At that time, the free end 58B pushes the front pillar trim 93A by the protrusion 58C. The protrusion 58C has a plate shape and is provided on the free end 58B so as to protrude in the developing direction F.

The deformable member 50 is deformed by the displacement of the movable surface 58 mainly around the base end portion 58A. As a result, the airbag 10 is deployed from the storage portion 51 toward the vehicle compartment. Further, the deformable member 50 has a weakened portion (low-rigidity portion) 58D provided at the base end portion 58A. The weakened portion 58D is composed of slits formed on both sides of the base end portion 58A. The weakened portion 58D reduces the rigidity of the base end portion 58A with respect to bending, and makes the base end portion 58A easier to deform. As a result, the base end portion 58 A is most easily deformed in the deformable member 50, and is deformed more greatly than the

other corner portions

52 and 53. In the deformable member 50, the surfaces 55 to 57 other than the movable surface 58 are not greatly displaced, and the portion (movable surface 58) ahead of the base end portion 58A is mainly displaced.

The length of the movable surface 58 (G1 in FIG. 2B) is longer than the width of the airbag 10 folded in the front pillar trim 93A (G2 in FIG. 2B). The length G1 of the movable surface 58 is a linear distance between the base end portion 58A and the free end portion 58B. The width G2 of the airbag 10 is a width in the vehicle width direction. The movable surface 58 is formed longer than the other surfaces 55 to 57 of the deformation member 50 and protrudes from the storage portion 51. The free end portion 58B is disposed at a position away from the airbag 10. By doing as described above, the airbag 10 reliably hits the movable surface 58. Further, when the movable surface 58 is pushed by the airbag 10, a bending stress larger than that of the

other corner portions

52 and 53 is generated at the base end portion 58 A. Thereby, the base end portion 58A is easily deformed.

The area of the movable surface 58 is larger than the areas of the other surfaces 55-57. Therefore, the movable surface 58 is pushed by the airbag 10 while receiving a large force from the airbag 10. The airbag 10 deforms the deformable member 50 in the deployment direction F and deploys in a curtain shape.

FIG. 3 is a plan view showing the deployed airbag 10. FIG. 3 shows the airbag 10 spread on a plane.
As shown in the figure, the airbag 10 is a bag body having a rectangular shape in plan view, and is manufactured, for example, from a base fabric made of a cloth coated with a resin. Here, the airbag 10 includes a front base fabric (front panel) 12 on the passenger side and a back base fabric (back panel) 13 on the side wall 91 side. The airbag 10 includes a gas supply port 14, a belt-like connecting member 20, and a plurality (six in FIG. 3) of fixed fabrics 21 to 26.

One end of the connecting member 20 is attached to the front end of the airbag 10, and the other end of the connecting member 20 is attached to the front pillar 93. The front end of the airbag 10 is connected to the front pillar 93 by the connecting member 20. The plurality of fixed fabrics 21 to 26 have a rectangular shape and are integrally formed on the upper edge of the airbag 10. Further, the fixing cloths 21 to 26 are disposed on the entire upper edge of the airbag 10. The connecting member 20 and the fixing cloths 21 to 26 are fixed at predetermined positions of the front pillar 93 and the roof rail 92 by fixing means (not shown) made of bolts or the like.

The front base fabric 12 and the back base fabric 13 are formed in the same shape, and are joined along the outer edge joint portion 15 in an overlapped state. The airbag 10 is partitioned by the outer edge joint portion 15, and the inflatable portion 30 is formed between the

base fabrics

12 and 13. The outer edge joint portion 15 defines the outer edge shape of the inflating portion 30. The

base fabrics

12 and 13 are joined at the outer edge joint portion 15 by sewing and adhesion. That is, the

base fabrics

12 and 13 are sewn one or more times along the outer edge joint portion 15, and the sewn portions are sealed with an adhesive. Thereby, the

base fabrics

12 and 13 are joined in an airtight manner at the outer edge joint portion 15.

In the airbag 10, a front inflating portion 31, a rear inflating portion 32, and a connected inflating portion 33 are formed by the outer edge joint portion 15. The inflating portions 31 to 33 each have a rectangular shape in plan view, and constitute the inflating portion 30 of the airbag 10 as a whole. The front inflating portion 31 is formed to be the longest in the front-rear direction among the inflating portions 31 to 33 and is disposed forward in the airbag 10. The front inflating portion 31 inflates at the side of the window 97 of the front door 95 and the center pillar 94, and mainly receives the front seat occupant.

The rear inflating portion 32 is formed shorter than the front inflating portion 31 in the front-rear direction, and is disposed rearward in the airbag 10. The rear inflating part 32 inflates above the rear door 96 and mainly receives the rear seat occupant. The connected expansion part 33 is formed narrower in the vertical direction than the

other expansion parts

31 and 32. The connecting inflating portion 33 is provided between the front inflating portion 31 and the rear inflating portion 32 at the upper edge of the airbag 10 and connects the inflating

portions

31 and 32 together. A non-inflatable portion 34 is formed between the

inflatable portions

31 and 32 from the lower edge of the airbag 10 upward. Since the non-inflatable portion 34 is provided outside the inflatable portion 30, even when the airbag 10 is inflated, the non-inflatable portion 34 is maintained in a state where it is not inflated.

The gas supply port 14 is an opening (insertion port) for inserting the inflator 2 into the airbag 10. The gas supply port 14 opens at the rear end of the front expansion portion 31. The

base fabrics

12 and 13 protrude obliquely upward from the upper edge of the airbag 10 at the gas supply port 14, and both side edges of the protruded portion are continuously joined from the outer edge joint portion 15. As a result, the gas supply port 14 is integrally provided on the upper edge of the airbag 10 and is formed approximately in the middle of the airbag 10 in the front-rear direction.

The inflator 2 is inserted into the airbag 10 from the gas supply port 14. For example, the inflator 2 is inserted into the gas supply port 14 provided with a diffuser that rectifies the gas. The gas supply port 14 is tightened from the outside by a clamp or a band (not shown), and is fixed to the inflator 2 in an airtight manner. The inflator 2 generates gas in the gas supply port 14. The gas supply port 14 supplies the gas generated by the inflator 2 into the airbag 10. The gas is supplied from the inflator 2 to the inflating part 30 of the airbag 10. The gas is supplied to the front expansion part 31 and is supplied to the rear expansion part 32 through the connection expansion part 33. Thereby, the airbag 10 is inflated and deployed.

The airbag 10 has first to fourth internal joint portions 16 to 19 in the outer edge joint portion 15 (inflatable portion 30). The

base fabrics

12 and 13 are joined by sewing and adhesion at a plurality of internal joint portions 16 to 19. The internal joint parts 16 to 19 extend from the outer edge joint part 15 into the inflating part 30, respectively, and the tips of the internal joint parts 16 to 19 are annularly joined in the inflating part 30. The annular portions 16A to 19A of the inner joint portions 16 to 19 are arranged with a predetermined distance between them and the outer edge joint portion 15 on the lower edge side of the airbag 10. The plurality of internal joints 16 to 19 are arranged apart from each other in the front-rear direction, and form a gas circulation part and an air chamber in the expansion part 30. That is, the internal joint portions 16 to 19 have a function as a partition that partitions the expansion portion 30. The internal joints 16 to 19 inflate the airbag 10 into a predetermined shape while suppressing the expansion of the inflatable part 30 in the vehicle width direction.

The inflating portion 30 is partitioned into first to fifth air chambers 35 to 39 by internal joint portions 16 to 19. In the front inflating portion 31, the first to third inner joint portions 16 to 18 are formed downward from the outer edge joint portion 15 on the upper edge side of the airbag 10. The upper ends of the first to third inner joint portions 16 to 18 are connected to the outer edge joint portion 15. As a result, the first to third air chambers 35 to 37 are formed in the front inflating portion 31 and are arranged in order from the front to the rear. In the first to third air chambers 35 to 37, the upper part and the side part are closed, respectively, and only the lower part is opened.

The first air chamber 35 is the front air chamber 3 disposed in a front pillar trim 93 A provided in the front pillar 93. The front air chamber 3 is formed in the front portion 11 of the airbag 10 and is accommodated in the front pillar trim 93 A when the airbag 10 is attached to the vehicle 90. The front air chamber 3 is deployed from the front pillar trim 93A into the vehicle interior when the airbag 10 is inflated and deployed. The front air chamber 3 has a gas inlet 3A, and the outer edge of the front air chamber 3 other than the gas inlet 3A is closed. That is, the front air chamber 3 is formed in the airbag 10 so that only one gas inlet 3A is opened.

The gas inlet 3A is provided at the lower end of the front air chamber 3 and allows gas to flow into the front air chamber 3 from below. Further, the gas inflow port 3 A is composed of a non-joining portion located between the first inner joint portion 16 and the outer edge joint portion 15. Within the front air chamber 3, the gas inlet 3 A is formed close to the lower edge of the airbag 10. The front air chamber 3 expands when gas flows in only from the gas inlet 3A. As a result, the front air chamber 3 gradually expands from below to above.

The intermediate expansion part 40 and the flow part 41 are formed in the front expansion part 31. The intermediate inflating part 40 is an air chamber that inflates between the gas supply port 14 and the circulation part 41, and is provided in the middle of the airbag 10 in the front-rear direction. The intermediate expansion portion 40 is formed downward from the gas supply port 14 at the rear end of the front expansion portion 31 by the third internal joint portion 18.

The circulation part 41 is an air chamber formed by connecting the lower ends of the second and

third air chambers

36 and 37, and is provided along the lower edge of the airbag 10. The flow portion 41 is located between the

annular portions

17A and 18A of the second and third inner

joint portions

17 and 18 and the outer edge joint portion 15. The circulation part 41 allows the lower part of the intermediate inflating part 40 to communicate with the lower part of the front air chamber 3 (first air chamber 35) located at the front end of the front inflating part 31. The intermediate expansion portion 40 and the gas inflow port 3 A communicate with each other through the circulation portion 41. The second and

third air chambers

36 and 37 open to the circulation portion 41 between the intermediate expansion portion 40 and the front air chamber 3. Lower end portions of the second and

third air chambers

36 and 37 communicate with a midway position of the circulation portion 41.

The gas flows from the rear part to the front part through the circulation part 41 and circulates from the intermediate expansion part 40 to the front air chamber 3. The circulation part 41 circulates the gas from the rear of the front air chamber 3 to the gas inlet 3 A along the lower edge of the airbag 10. The gas flows into the front air chamber 3 through the intermediate expansion part 40, the circulation part 41, and the gas inlet 3A. Further, the gas flows from the circulation part 41 into the second and

third air chambers

36 and 37.

The second and

third air chambers

36 and 37 are the rear air chamber 4 provided behind the front air chamber 3. The rear air chamber 4 is mainly accommodated in the headlining 92A when the airbag 10 is attached to the vehicle 90. The rear air chamber 4 is deployed from the headlining 92A into the vehicle compartment when the airbag 10 is inflated and deployed. The rear air chamber 4 is provided above the circulation part 41, and the gas flows into the rear air chamber 4 only from the circulation part 41. The rear air chamber 4 is expanded above the circulation part 41 only by gas flowing from the lower circulation part 41. As a result, the rear air chamber 4 gradually expands from below to above.

The gas generated by the inflator 2 is supplied from the gas supply port 14 to the intermediate expansion unit 40. In the front inflating part 31, the gas flows from the intermediate inflating part 40 to the circulation part 41 and flows into the third air chamber 37 and the second air chamber 36 from below while passing through the circulation part 41. Further, the gas flows into the first air chamber 35 from the lower gas inlet 3 A through the circulation part 41.

The intermediate expansion part 40 starts to expand first and expands from the upper part to the lower part. The circulation part 41 starts to expand following the intermediate expansion part 40 and expands from the intermediate expansion part 40 toward the first air chamber 35. The air chambers 35 to 37 start to expand following the flow part 41 and expand as the flow part 41 expands. Further, the air chambers 35 to 37 start to expand in order from the rear to the front in accordance with the order in which the gas flows. The first air chamber 35 finally starts to expand, and fully expands at a predetermined timing after the

other air chambers

36 and 37 complete the expansion. As described above, the gas flows into one or more (two in this case) the rear air chamber 4 and the front air chamber 3 of the airbag 10 from below. The rear air chamber 4 and the front air chamber 3 start to expand at different timings as gas flows in order. The front air chamber 3 expands later than the rear air chamber 4.

4th and

5th air chambers

38 and 39 are formed in the rear inflating portion 32 by the bent fourth internal joint portion 19. The fourth and

fifth air chambers

38 and 39 are disposed in the rear expansion portion 32 at the rear and the front. The fourth air chamber 38 is formed along the outer edge joint portion 15, and is connected to the rear end of the connection expansion portion 33 and the lower portion of the fifth air chamber 39. The gas generated by the inflator 2 flows into the fourth air chamber 38 from the gas supply port 14 through the connecting expansion portion 33. In the rear expansion part 32, the gas passes through the fourth air chamber 38 and flows into the fifth air chamber 39 from the lower part. The fourth and

fifth air chambers

38 and 39 expand in order according to the order in which the gas flows.

When the operation signal is received after the airbag device 1 is mounted on the vehicle 90, the inflator 2 operates to generate gas. This gas is supplied to the inflating portion 30 in the airbag 10 to inflate and deploy the airbag 10 in a curtain shape while eliminating the folded shape. The airbag 10 (see FIG. 1) deploys downward from the top of the side wall 91 by pushing the trim and the head lining 92A open.

4 and 5 are cross-sectional views showing the airbag 10 to be deployed. 4 and 5, the airbag 10 and the vehicle 90 are shown cut from the position of the deformable member 50 and viewed from the front. 4A, 4B, 5A, and 5B show the deployment process of the airbag 10 in order. The process of the airbag 10 (front air chamber 3) deploying from the front pillar 93 at the position of the deformable member 50 will be described with reference to FIGS.
As shown in FIG. 4A, the airbag 10 and the deformable member 50 are disposed in a front pillar trim 93A attached to the vehicle 90. A gap Q is provided between the movable surface 58 of the deformable member 50 and the front pillar trim 93A (front end portion 93B) from the base end portion 58A of the movable surface 58 to the protrusion 58C. A front end portion 93B of the front pillar trim 93A is attached to the seal member 99. The seal member 99 is attached to the vehicle 90 and seals the inner surface of the window portion 97 (window glass).

When the airbag 10 starts to be deployed, the deformable member 50 is pushed and deformed by the airbag 10 to be deployed, as shown in FIG. 4B. At that time, as described above, the base end portion 58A is bent and deformed by the force that the movable surface 58 receives from the airbag 10. With this bending deformation, the movable surface 58 and the free end portion 58B move in the deployment direction F of the airbag 10. The free end portion 58B comes into contact with the front end portion 93B of the front pillar trim 93A and removes the front end portion 93B from the seal member 99. The deformable member 50 pushes the front pillar trim 93A in the unfolding direction F by pushing the front pillar trim 93A by the free end 58B. The deformation member 50 deforms the front pillar trim 93 A to form a passage port 93 C of the airbag 10.

The passage port 93 C is an opening through which the airbag 10 passes, and is formed between the front pillar trim 93 A and the front pillar 93. The free end portion 58B of the movable surface 58 pushes and opens the front pillar trim 93A in the deployment direction F of the airbag 10 to form a passage port 93C. Subsequently, as shown in FIG. 5A, the front air chamber 3 of the airbag 10 passes through the passage port 93C and expands toward the vehicle compartment. Further, the movable surface 58 is pushed by the airbag 10 to release the deployment direction F, and the airbag 10 is deployed in the vehicle interior. The deformable member 50 is deformed so that the movable surface 58 is along the development direction F. The base end portion 58 A is deformed to such an extent that the movable surface 58 does not interfere with the airbag 10. The airbag 10 is inflated after being deployed in the vehicle interior.

When the deployed airbag 10 is inflated, the deformable member 50 is further deformed by being pushed by the inflating airbag 10 as shown in FIG. 5B. At that time, the base end portion 58A is deformed more greatly, and the displacement amount of the movable surface 58 is increased. As the deformation member 50 is deformed, the front pillar trim 93 A is further opened to enlarge the passage port 93 C so as not to prevent the airbag 10 from being inflated. The airbag 10 is inflated into a predetermined state (see FIG. 5B) in the passage opening 93C and in the passenger compartment. The front pillar trim 93A is held by the protrusion 58C of the free end 58B and is maintained in the deformed shape. The airbag 10 is inflated and deployed in a curtain shape without being obstructed by the deformable member 50 and the front pillar trim 93A.

FIG. 6 is a view showing the airbag 10 inflated and deployed in the vehicle 90. In FIG. 6, the side wall 91 of the vehicle 90 and the airbag apparatus 1 are shown corresponding to FIG.
As illustrated, the airbag 10 is deployed along the side wall 91 so as to cover the side wall 91 with the gas supplied from the inflator 2. Further, the airbag 10 extends to the

doors

95 and 96 and closes the

windows

97 and 98. The airbag 10 is inflated and deployed between the occupant and the side wall 91, receives the occupant in the front seat and the rear seat, and protects the occupant's head as a center.

At that time, in the pre-expansion unit 31, the intermediate expansion unit 40 starts to expand first by the gas supplied from the gas supply port 14. The intermediate inflating part 40 pushes and opens the head lining 92 A and deploys it in the vehicle interior. The intermediate expansion part 40 expands gradually downward and expands from the upper part to the lower part. The airbag 10 is pulled downward by the expanding intermediate inflating portion 40. As a result, the intermediate portion of the airbag 10 including the intermediate inflating portion 40 is pulled out from the headlining 92A and deployed in the vehicle interior. The rear air chamber 4 develops gradually from the rear toward the front. Subsequently, the flow part 41 starts to expand due to the gas flowing in from the intermediate expansion part 40.

The distribution unit 41 expands from the intermediate expansion unit 40 toward the front air chamber 3 in the vehicle interior. The gas in the circulation part 41 flows into the rear air chamber 4 from below, and expands the rear air chamber 4 from below to above. The front air chamber 3 is pulled downward by the circulation portion 41 and the rear air chamber 4 while the circulation portion 41 and the rear air chamber 4 are expanded. At the same time, the deformable member 50 is deformed mainly by being pushed by the front air chamber 3. The deformable member 50 pushes and opens the front pillar trim 93A to form a passage port 93C. The front air chamber 3 is developed from the passage port 93C into the vehicle interior. The gas flows into the front air chamber 3 from the gas inlet 3 A through the circulation part 41. The front air chamber 3 expands when gas flows in only from the gas inlet 3A.

Since the gas inlet 3A is provided at the lower end of the front air chamber 3, the gas flows into the front air chamber 3 only from the lower part without flowing from the upper part or the side part. Therefore, after the gas reaches the lower side in the airbag 10 and the airbag 10 is pulled out into the vehicle interior, the front air chamber 3 starts to expand. The gas flows to the gas inlet 3 A while inflating each part of the airbag 10 and flows into the front air chamber 3. Further, since the inflow of gas into the front air chamber 3 is suppressed until the gas inflow port 3A is drawn into the vehicle compartment and deployed, the expansion of the front air chamber 3 is delayed. Therefore, the front air chamber 3 starts inflating with a delay in the airbag 10. The front air chamber 3 is drawn into the vehicle interior before expanding in the front pillar trim 93A, and starts expanding after being expanded into the vehicle interior.

In the present embodiment, the front air chamber 3 is deployed in the vehicle compartment before the circulation part 41 expands to the gas inlet 3A. The front air chamber 3 is pulled out from the front pillar trim 93A in a thin state without expanding. Further, the front air chamber 3 is developed from the passage port 93C into the vehicle interior without greatly pushing the front pillar trim 93A open. Therefore, the deformation of the front pillar trim 93A is reduced, and the impact and damage received by the front pillar trim 93A are also reduced. The front air chamber 3 is smoothly deployed without causing cracks or damage to the front pillar trim 93A. By inflating from the rear air chamber 4 to the front air chamber 3, the entire airbag 10 is inflated.

The front inflating portion 31 of the airbag 10 is inflated and deployed in an area from the front pillar 93 to the center pillar 94 (an area in front of the side wall 91). The intermediate inflating portion 40 expands along the center pillar 94 and overlaps the center pillar 94. The first to third air chambers 35 to 37 expand above the front door 95 and cover the window 97. The first air chamber 35 (front air chamber 3) is located in the forefront in the airbag 10 and is disposed between the front pillar 93 and the front door 95. The upper edge of the first air chamber 35 overlaps the front pillar 93. The circulation part 41 extends in the front-rear direction and is disposed along the upper edge of the front door 95. Further, the circulation part 41 expands so as to overlap the front door 95. As a result, the whole or a part (here, the lower part) of the circulation part 41 overlaps the door trim 95A of the front door 95.

Thus, the airbag 10 has the upper inflating portion 42 and the lower inflating portion 43 that overlap the vehicle 90 when inflated and deployed. The upper inflating portion 42 and the lower inflating portion 43 are part of the front inflating portion 31 and are provided on the upper edge and the lower edge of the airbag 10. The upper inflating portion 42 overlaps the front pillar 93 when the airbag 10 is inflated. The upper expansion part 42 expands between the front pillar 93 and the front pillar trim 93A (in the front pillar trim 93A). The expanded upper expansion portion 42 is sandwiched between the front pillar 93 and the front pillar trim 93A. When the airbag 10 receives an occupant, the upper inflating portion 42 is supported by the front pillar 93.

FIG. 7 is an enlarged view of the upper inflating portion 42 (hatched in FIG. 7) of the airbag 10. FIG. 7 shows the X region of FIG. H shown in FIG. 7 is the length of the upper expansion part 42 along the lower edge of the front pillar 93. W is a distance (overlap amount) at which the upper expanding portion 42 overlaps the front pillar 93.
As shown in the drawing, the upper expansion portion 42 is a predetermined region of the first air chamber 35 and is provided on the upper edge of the first air chamber 35 (the front air chamber 3) including the outer edge joint portion 15. Further, the upper inflating portion 42 is formed in the airbag 10 such that the length H is longer than the overlap amount W. Here, the length H is set to 100 mm. The overlap amount W is set to 40 mm.

The lower inflating portion 43 (see FIG. 6) overlaps a door trim 95A provided on the front door 95 when the airbag 10 is inflated. The lower inflating portion 43 inflates in the passenger compartment and comes into contact with the surface of the door trim 95A. When the airbag 10 receives an occupant, the lower inflating portion 43 is supported by the door trim 95A. At the lower edge of the airbag 10, the lower inflating portion 43 is formed such that the front portion is inflated downward more than other portions. Thereby, in the lower expansion part 43, pillar lower part 43A expand | swells largely below rather than the other part (back part) 43B. The pillar lower portion 43 A of the lower expansion portion 43 is a portion that expands below the front pillar 93. The pillar lower portion 43 A overlaps a door trim 95 A located below the front pillar 93.

The pillar lower portion 43A is formed in the lower expansion portion 43 by partially protruding a part of the front expansion portion 31 downward. The pillar lower portion 43 A is provided below the first internal joint portion 16. A rear portion 43 B of the lower expansion portion 43 is provided below the second internal joint portion 17. The first internal joint portion 16 is formed farther from the lower outer edge joint portion 15 than the second internal joint portion 17. As a result, the pillar lower portion 43A expands thicker in the vehicle width direction than the other portions (rear portion 43B). Here, the diameter R1 at the time of expansion of the pillar lower portion 43A is set to 105 mm. The diameter R1 is a diameter when the air chamber below the first internal joint portion 16 is expanded. The diameter R2 of the rear portion 43B when expanded is set to 95 mm. The diameter R2 is a diameter when the air chamber below the second internal joint portion 17 is expanded.

FIG. 8 is an enlarged view of the lower inflating portion 43 (hatched in FIG. 8) of the airbag 10. FIG. 8 shows the Y region of FIG. L1 of the lower expansion portion 43 shown in FIG. 8 is a distance (overlap amount) where the pillar lower portion 43A overlaps the door trim 95A. L2 of the lower inflating portion 43 is a distance (overlap amount) where the rear portion 43B overlaps the door trim 95A.

The lower expansion part 43 is a predetermined area of the circulation part 41 as shown in the figure, and is provided in the lower part of the circulation part 41 including the outer edge joint part 15. Further, in the lower inflating portion 43, the pillar lower portion 43A overlaps with the door trim 95A larger than the other portion (rear portion 43B). Here, the overlap amount L1 of the pillar lower portion 43A is set to 130 mm. The overlap amount L2 of the rear portion 43B is set to 50 mm. As described above, the pillar lower portion 43A expands relatively downward and relatively overlaps the door trim 95A within the lower expansion portion 43.

When the airbag 10 (see FIG. 6) receives the occupant, the upper inflating portion 42 and the lower inflating portion 43 are pressed against the vehicle body (the front pillar 93 and the door trim 95A) of the vehicle 90. The front pillar 93 and the door trim 95 A interfere with the upper expansion portion 42 and the lower expansion portion 43 to press the upper expansion portion 42 and the lower expansion portion 43. As a result, the upper expansion portion 42 and the lower expansion portion 43 are supported by the vehicle body, and movement of the upper expansion portion 42 and the lower expansion portion 43 in the vehicle outward direction is prevented. In front of the airbag 10, the upper and lower edges of the airbag 10 are supported by the upper inflation portion 42 and the lower inflation portion 43, and the airbag 10 is held on the vehicle body. Thereby, when the airbag 10 receives a passenger | crew, the deformation | transformation and movement to the vehicle exterior direction of the airbag 10 are suppressed.

The airbag 10 is pushed by the occupant and is deformed outward. At that time, since the airbag 10 is supported by the vehicle body at two locations, upper and lower, deformation of the airbag 10 is reduced. Since the lower inflating portion 43 of the airbag 10 is supported by the door trim 95 A, the lower inflating portion 43 is prevented from moving outside the window portion 97. As a result, the airbag 10 is maintained in an inflated state so as to cover the side wall 91 when the occupant is received. The occupant is reliably received by the airbag 10 without being released to the outside of the vehicle.

As described above, in the airbag device 1, an occupant can be reliably received by the airbag 10 inflated and deployed in a curtain shape. Moreover, the performance (it is called discharge | release suppression performance) which suppresses the passenger | crew's discharge | release outside the vehicle which the airbag 10 has can be improved. Further, in the airbag 10, the upper inflation portion 42 and the lower inflation portion 43 overlap the vehicle body. Therefore, compared with the case where only the lower inflatable portion 43 is overlapped with the vehicle body, the release suppression performance of the airbag 10 can be improved with a small overlap amount as a whole. Accordingly, since the airbag 10 can be made smaller, the usage amount of the base fabric and the cost of the airbag 10 can be reduced. Therefore, the airbag apparatus 1 can be manufactured at low cost.

In the present embodiment, the pillar lower portion 43A overlaps the door trim 95A larger than the rear portion 43B in the lower inflating portion 43. Therefore, the upper and lower portions of the airbag 10 can be firmly supported in front of the airbag 10. When the occupant is received above the pillar lower portion 43A, the airbag 10 can surely suppress the occupant's release from the vehicle. In the airbag 10, a great effect is obtained when an occupant is received in the vicinity of the first air chamber 35 or the first internal joint portion 16 located in the front. Even when an occupant is received above the rear portion 43B, the lower edge of the airbag 10 is supported by the vehicle body by the rear portion 43B and the pillar lower portion 43A, so that the lower edge is prevented from moving outward. As a result, the airbag 10 can suppress occupant release from the vehicle. By greatly overlapping only the pillar lower portion 43A, the capacity of the airbag 10 can be reduced.

The pillar lower portion 43A of the lower expansion portion 43 expands thicker in the vehicle width direction than the rear portion 43B, so that the rigidity of the pillar lower portion 43A is increased. Thereby, when the airbag 10 receives a passenger | crew, pillar lower part 43A becomes difficult to deform | transform. Since the deformation of the pillar lower portion 43A is suppressed, the pillar lower portion 43A is reliably and stably supported by the door trim 95A. Therefore, the release suppressing performance of the airbag 10 can be further improved. By inflating only the pillar lower portion 43A thickly, the capacity of the airbag 10 can be made smaller than when the entire lower inflating portion 43 is inflated thickly.

When the occupant is received by the airbag 10 with the

windows

97 and 98 opened, the airbag 10 may be deformed to the outside of the surfaces of the windows 97 and 98 (referred to as window surfaces). There is a possibility that the occupant jumps out of the

windows

97 and 98 to the outside of the vehicle beyond the window surface. On the other hand, the airbag 10 can shorten the distance that the occupant jumps out of the window surface, thereby preventing the occupant from jumping out of the vehicle. In other words, the airbag 10 can suppress the distance that the occupant jumps out of the window surface within a predetermined distance, thereby suppressing the occupant's release from the vehicle. Even when the lower inflating portion 43 is detached from the door trim 95A, the movement of the occupant can be sufficiently stopped while the lower inflating portion 43 is supported by the door trim 95A, so that the occupant can be prevented from being released from the vehicle.

9 and 10 are views showing the airbag 10 that has received an occupant. 9 and 10, the airbag 10 is schematically shown corresponding to FIG. The occupant 100 shows only the head.
When the occupant 100 (see FIG. 9) is received above the pillar lower portion 43A, the airbag 10 is deformed outward. Here, the occupant 100 is received in the vicinity of the first air chamber 35 and the first internal joint 16. At that time, the airbag 10 is supported by the vehicle body above and below the occupant 100 by the upper inflation portion 42 and the lower inflation portion 43, and the upper and lower edges of the airbag 10 are held in the vehicle 90. Therefore, the movement of the occupant 100 can be stopped by the airbag 10 and the occupant 100 can be prevented from jumping out of the vehicle. Further, it is possible to prevent the passenger 100 from being released to the outside of the vehicle.

Even when the occupant 100 (see FIG. 10) is received above the rear portion 43B (here, in the vicinity of the second internal joint portion 17), the airbag 10 is supported by the upper inflating portion 42 and the lower inflating portion 43. Thus, the upper and lower edges of the airbag 10 are held in the vehicle 90. Therefore, the movement of the occupant 100 can be stopped by the airbag 10 and the occupant 100 can be prevented from jumping out of the vehicle. The passenger 100 can be prevented from being released outside the vehicle.

When the airbag 10 (see FIG. 6) is inflated and deployed, gas flows into the front air chamber 3 only from the lower gas inlet 3A. Therefore, as described above, the start of expansion of the front air chamber 3 can be delayed. The front air chamber 3 can be pulled out into the vehicle compartment before it expands in the front pillar trim 93A. Thereby, the impact which the front pillar trim 93A receives can be reduced. It is also possible to prevent the front pillar trim 93A from being damaged.

The gas flows into the rear air chamber 4 and expands the rear air chamber 4 while flowing through the circulation part 41 toward the gas inlet 3A. As a result, the gas slowly reaches the gas inlet 3A, so that the front air chamber 3 starts to expand later. Thereby, since the front air chamber 3 can be reliably pulled out into the vehicle compartment before the expansion, the front pillar trim 93A can be reliably prevented from being damaged.

The intermediate expansion part 40 expands between the gas supply port 14 and the circulation part 41, so that it is possible to further delay the gas from reaching the circulation part 41 and the gas inlet 3A. By providing the circulation portion 41 along the lower edge of the airbag 10, the front air chamber 3 before being inflated is strongly pulled by the lower portion of the airbag 10 that is inflated first. The front air chamber 3 is reliably pulled out from the front pillar trim 93A before the start of expansion. Since the front pillar trim 93A is generally narrower and more rigid than other pillar trims and headlining 92A, it is easily damaged. On the other hand, according to the airbag device 1, the airbag 10 can be smoothly deployed without damaging the front pillar trim 93A. It is also possible to prevent the fragments of the front pillar trim 93A from scattering.

The deformable member 50 (see FIGS. 2, 4 and 5) is pushed by the airbag 10 and deformed to form a passage port 93C of the airbag 10. The airbag 10 is smoothly deployed through the passage port 93C. At that time, since the energy of the airbag 10 to be deployed can be absorbed by the deformable member 50, the impact and damage received by the front pillar trim 93A can be reduced. Damage to the front pillar trim 93A can also be reliably prevented.

When the deployed airbag 10 is inflated, the deformation member 50 is pushed by the inflating airbag 10 and further deforms. The deformation member 50 enlarges the passage port 93 C so as not to prevent the airbag 10 and the front air chamber 3 from inflating to a desired state. Thereby, the airbag 10 is inflated to a predetermined shape and size without being obstructed by the deformable member 50. As a result, the rigidity of the airbag 10 can be prevented from changing. The airbag 10 exhibits high release suppression performance.

In the deformable member 50, the movable surface 58 is displaced by bending deformation of the base end portion 58A, and the front pillar trim 93A is pushed open by the free end portion 58B. With this movable surface 58, the front pillar trim 93 A can be accurately pushed and opened in accordance with the passage of the airbag 10, and the passage opening 93 C can be formed in the deployment direction F of the airbag 10. Since the length G 1 of the movable surface 58 is longer than the width G 2 of the airbag 10, the airbag 10 reliably hits the movable surface 58. Further, when the movable surface 58 is pushed by the airbag 10, a large bending stress is generated in the base end portion 58A, so that the base end portion 58A is greatly deformed. Therefore, the movable surface 58 can be reliably moved to the outside in the deployment direction F, and the airbag 10 can be deployed smoothly. The airbag 10 is deployed from the passage opening 93 C without being interfered with the deformable member 50, and is accurately inflated and deployed in the vehicle interior. Thereby, the performance of the airbag 10 can be secured stably.

By providing the weakened portion 58D at the base end portion 58A of the movable surface 58, the rigidity of the base end portion 58A with respect to bending can be reduced. As a result, the base end portion 58A is more easily deformed, so that the airbag 10 can be deployed more smoothly. When the movable surface 58 is formed longer than the other surfaces 55 to 57, the base end portion 58A can be more easily deformed than the

other corner portions

52 and 53. When the area of the movable surface 58 is increased, the force that the movable surface 58 receives from the airbag 10 increases. Thereby, since more energy can be absorbed from the airbag 10 to be deployed, the damage to the front pillar trim 93A can be further reduced.

A gap Q is provided between the movable surface 58 and the front pillar trim 93A (front end portion 93B) from the base end portion 58A to the projecting portion 58C of the movable surface 58. Therefore, only the deformable member 50 receives force from the airbag 10 at the initial stage of deployment of the airbag 10. Due to this force, the deformable member 50 is deformed to some extent, and then the deformable member 50 comes into contact with the front pillar trim 93A. That is, after the deformable member 50 absorbs the energy of the airbag 10 to some extent, the front pillar trim 93 A receives a force from the deformable member 50. Therefore, the impact and damage received by the front pillar trim 93A can be further reduced, and damage to the front pillar trim 93A can be prevented. When the deformation member 50 is formed in a symmetrical shape with respect to the center plane CF passing through the attachment hole 55A, the deformation member 50 can be attached to the front pillars 93 on both sides of the vehicle 90.

In addition, the test regarding the emission suppression performance of the inflated and deployed airbag 10 is defined in FMVSS226 of the Federal Motor Safety Standard (Federal Motor Safety Standard). In the test defined in FMVSS 226, the head foam that imitates the head is caused to collide with the airbag 10 inflated and deployed from the vehicle interior side toward the vehicle exterior side, and the displacement amount of the head foam protruding outside the vehicle is measured. In FMVSS 226, the test position (target location) where the headform collides is also defined for the vehicle body layout. In many cases, the test position set at the foremost position (referred to as the forefront test position) among the plurality of test positions is generally set below the front pillar 93.

In the airbag 10 of the present embodiment, the pillar lower portion 43A of the lower inflating portion 43 is provided below the forefront test position of the airbag 10 defined by the FMVSS 226. Further, the upper inflating portion 42 is provided above the forefront test position of the airbag 10. The upper inflating portion 42 and the pillar lower portion 43A are formed above and below the foremost test position of the airbag 10, respectively, and overlap the vehicle body above and below the foremost test position.

Next, another embodiment of the deformable member 50 will be described.
FIG. 11 is a diagram illustrating a deformable member 70 according to another embodiment. FIG. 11A is a front view of the deformable member 70. FIG. 11B is a side view of the deformable member 70 viewed from the direction of arrow S4 in FIG. 11A. FIG. 11C is a perspective view of the deformable member 70 viewed from the direction of arrow S5 in FIG. 11A. FIG. 11D is a perspective view of the deformable member 70 viewed from the direction of arrow S6 in FIG. 11A.
In this deformation member 70, the same structure as the deformation member 50 already demonstrated is attached | subjected the same code | symbol, and the description is abbreviate | omitted.

In the deformable member 70, only the weakened portion 71 is different from the weakened portion 58D of the deformable member 50 as shown in the figure. The weakening part 71 consists of a slit-shaped through-hole. One weakening 71 is formed at the center of the base end 58A.

Thus, the

deformable members

50 and 70 can be formed in various shapes. The airbag 10 can also be formed in various shapes. For example, the interior of the front air chamber 3 may be divided into two or more. The rear air chamber 4 may be composed of one or three or more air chambers. The

deformable members

50 and 70 may be provided with reinforcing portions (projections or the like) that increase rigidity in portions other than the movable surface 58. A groove formed in the base end portion 58A of the movable surface 58 may be a weakened portion.

DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus, 2 ... Inflator, 3 ... Front air chamber, 3A ... Gas inlet, 4 ... Back air chamber, 10 ... Air bag, 11 ... Front , 12 ... front base fabric, 13 ... back base fabric, 14 ... gas supply port, 15 ... outer edge joint, 16 to 19 ... internal joint, 20 ... connecting member , 21 to 26 ... fixed cloth, 30 ... expansion part, 31 ... front expansion part, 32 ... rear expansion part, 33 ... connection expansion part, 34 ... non-expansion part, 35 39 ... Air chamber, 40 ... Intermediate expansion part, 41 ... Flowing part, 42 ... Upper expansion part, 43 ... Lower expansion part, 43A ... Pillar lower part, 43B ... -Rear part, 50 ... deformation member, 51 ... storage part, 52-54 ... corner, 55 ... first surface, 56 ... second surface, 57 ... first 58 ... movable surface, 58A ... proximal end, 58B ... free end, 58C ... projection, 58D ... weakening, 70 ... deformation member, 71 ...・ Weakening part, 90 ... vehicle, 91 ... side wall, 92 ... roof rail, 92A ... head lining, 93 ... front pillar, 93A ... front pillar trim, 93C ... passing port, 94 ... center pillar, 95 ... front door, 95A ... door trim, 96 ... rear door, 97 ... window, 98 ... window, 99 ... seal member.

Claims

An airbag device including an airbag disposed up to the front pillar along an upper side wall of the vehicle interior, and an inflator that generates gas to inflate and deploy the airbag in a curtain shape,
A front air chamber in which an air bag expands from the front pillar trim provided in the front pillar into the vehicle interior, an upper inflating portion that overlaps the front pillar when the air bag is inflated, and a front door of the vehicle when the air bag is inflated And a lower inflating portion that overlaps the door trim provided in the
An airbag device in which a front air chamber has a gas inlet provided at a lower end thereof, and expands when gas flows only from the gas inlet.
In the airbag apparatus described in Claim 1,
The air bag has one or more circulation parts that circulate gas from the rear of the front air chamber to the gas inlet, and one that is provided behind the front air chamber and expands above the circulation part by only the gas flowing in from the circulation part. An airbag device having a rear air chamber.
In the airbag apparatus described in Claim 2,
An airbag device in which a circulation part is provided along the lower edge of the airbag.
In the airbag apparatus described in Claim 2 or 3,
An airbag device in which an airbag has a gas supply port that supplies gas generated by an inflator into the airbag, and an intermediate expansion portion that expands between the gas supply port and the circulation portion.
In the airbag apparatus as described in any one of Claim 1 thru | or 4,
An airbag apparatus including a deformable member that is disposed in a front pillar trim and is deformed by being pushed and deformed by a deploying airbag to open and open the front pillar trim.
In the airbag apparatus described in Claim 5,
An airbag device in which the deformable member is pushed by the inflating airbag and deforms to expand the passage opening when the deployed airbag is inflated.
In the airbag apparatus described in Claim 5 or 6,
The deformable member is disposed in the airbag deployment direction, and has a movable surface that is pushed by the airbag to be deployed and opens the airbag deployment direction.
An airbag device, wherein the movable surface has a base end portion that bends and deforms in the deployment direction of the airbag to displace the movable surface, and a free end portion that pushes the front pillar trim in the deployment direction of the airbag.
In the airbag apparatus described in Claim 7,
An airbag device in which a length between a base end portion and a free end portion of a movable surface is longer than a width of an airbag folded in a front pillar trim.
In the air bag device according to claim 7 or 8,
The airbag apparatus which has a weakening part in which a deformable member is provided in the base end part of a movable surface, and reduces the rigidity with respect to the bending of a base end part.
The airbag device according to any one of claims 1 to 9,
An airbag device in which a lower portion of a pillar that expands below a front pillar overlaps with a door trim larger than other portions in a lower inflatable portion.
In the airbag apparatus described in Claim 10,
An airbag device in which a pillar lower part of a lower inflating part inflates thicker in the vehicle width direction than the other parts.