JP4877176B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that deploys and inflates an airbag stored in a folded state inside a vehicle roof between a vehicle body side wall and a seat.

2. Description of the Related Art Conventionally, there has been known an airbag apparatus including an airbag that is stored in a folded state between a vehicle roof body and a head lining.
In such a device, when an impact from a predetermined direction is applied to the vehicle, the gas generated along with the impact flows into the airbag and the airbag starts to inflate. Thereafter, the head lining is deformed by being pressed by the inflated airbag, and the end of the head lining is separated from the roof body. The airbag is inflated into the vehicle compartment from the opening formed thereby and deployed between the vehicle body side wall and the seat, so that the occupant seated on the seat is protected from the impact.

In addition, it has been proposed that the airbag has a double structure including an airbag body and an inner bag that expands inside the airbag body (see, for example, Patent Document 1). The inner bag functions as a communication path that connects a gas inlet through which inflation gas flows into the airbag and a plurality of portions inside the airbag body. By providing such an inner bag, a plurality of portions of the airbag can be inflated and deployed at the same time, and the entire airbag can be deployed in a balanced manner.
JP 2004-359209 A

  By the way, in order to quickly deploy the airbag into the vehicle compartment, it is desirable to form an opening for inflating the airbag at an early stage. In this regard, when the inner bag is provided and the entire airbag is inflated and deployed in a balanced manner as in the above-described device, the timing at which the inner pressure of the airbag increases may be delayed. This is one factor that hinders the timing at which the force for pressing the head lining increases at the initial stage of inflation of the airbag, and hence the timing at which the opening is formed. In the above apparatus, there is still room for improvement in terms of such an early deployment of the airbag.

  This invention is made | formed in view of such a situation, The objective is to provide the airbag apparatus which can aim at the early deployment of an airbag.

In the following, means for achieving the above object and its operational effects will be described.
According to one aspect of the present invention, as an air bag, having a double structure consisting of an inner bag which is inflated within the airbag body and the airbag body to expand between the seat and the body side wall of the vehicle of the vehicle The inner bag functions as a communication passage that communicates the gas inlet and the plurality of internal parts, and is stored in a folded state between the roof body of the vehicle and the head lining. The airbag main body includes a gas inlet that is configured to be inflated into the vehicle interior by pressing and deforming the head lining toward the vehicle interior side during deformation. A lateral cell that communicates with the vehicle in the left-right direction, a lateral vertical cell that communicates with both lateral ends of the lateral cell and extends to the vehicle lower side, and a lateral cell in the lateral cell. A center vertical cell that communicates with the central portion of the vehicle and extends to the vehicle lower side, and a sheet-like sheet portion is formed between the side vertical cell and the center vertical cell. Is deployed at the position of the headrest when the airbag is inflated and deployed, and the inner bag communicates with the gas inlet and extends in the lateral direction of the vehicle inside the lateral cell. a line along the extending direction of the vehicle transverse direction of the inner bag, and its gist in that the airbag body is accommodated in a state in which the folded inner bag in company.
The invention according to claim 2 is a double structure comprising an airbag body that is deployed between a vehicle seat and a side wall of the vehicle as an airbag, and an inner bag that is inflated inside the airbag body. The inner bag functions as a communication path that connects the gas inlet and the plurality of internal parts, and is stored in a folded state between the roof body and the head lining of the vehicle. In the airbag apparatus, the airbag lining is inflated into the vehicle interior by pressing and deforming the head lining toward the vehicle interior side during inflation, and the airbag body is in a direction along the side wall of the body The inner bag is a portion that functions as the communication path and extends in the left-right direction of the vehicle inside the airbag body. And the airbag has an opening in the left-right direction of the vehicle, and the airbag is a line along the direction in which the inner bag extends in the left-right direction of the vehicle. Is stored in a folded state with the inner bag, and the line along the extending direction of the inner bag in the vehicle lateral direction is the central portion of the portion in the passage width direction.
According to a third aspect of the present invention, the airbag has a double structure comprising an airbag body that is deployed between a vehicle seat and a vehicle body side wall, and an inner bag that is inflated inside the airbag body. The inner bag functions as a communication path that connects the gas inlet and the plurality of internal parts, and is stored in a folded state between the roof body and the head lining of the vehicle. In the airbag apparatus, the airbag lining is inflated into the vehicle interior by pressing and deforming the head lining toward the vehicle interior side during inflation, and the airbag body is in a direction along the side wall of the body The inner bag is a portion that functions as the communication path and extends in the left-right direction of the vehicle inside the airbag body. And the airbag has an opening in the left-right direction of the vehicle, and the airbag is a line along the direction in which the inner bag extends in the left-right direction of the vehicle. Is stored in a folded state together with the inner bag, and the line along the extending direction of the inner bag in the lateral direction of the vehicle is a position closer to the gas inlet side than the central portion in the passage width direction of the portion. Is the gist.

According to any one of the first to third aspects, in the initial stage of inflation of the airbag, gas is maintained in the inner bag while maintaining communication between the gas inlet through the inner bag and each portion inside the airbag body. It is possible to reduce the cross-sectional area of the passing portion. Therefore, the pressure inside the inner bag can be quickly increased as compared with a device in which the airbag body is not folded together with the inner bag. As a result, when the airbag is inflated, it is possible to quickly increase the force with which the airbag presses the head lining so that the head lining can be deformed quickly, thereby enabling early deployment of the airbag. become.
Here, there is an airbag apparatus in which an inner bag having a shape extending in the width direction of the airbag body is provided inside the airbag body deployed in a direction along the vehicle body side wall. In such an apparatus, the flow of gas flowing into the inside of the airbag body from the gas inlet is guided to both sides in the width direction of the airbag body, resulting in the occurrence of poor deployment in the width direction of the airbag body. It can be suppressed.
According to the configuration of the second or third aspect, in such a device, it is possible to achieve early deployment of the airbag while suppressing the occurrence of poor deployment in the width direction of the airbag body.
Furthermore, according to the configuration of the invention according to claim 2 or 3, the airbag main body at a position farther from the gas inlet than the central portion in the passage width direction of the portion extending in the width direction of the airbag main body. Compared with a device in which the gas is folded, the cross-sectional area of the portion through which the gas passes in the inner bag can be reduced. Therefore, the pressure inside the inner bag can be increased earlier, and the airbag can be deployed earlier.

According to a fourth aspect of the present invention, in the airbag device according to any one of the first to third aspects, the head lining is formed of a flexible material and is locked to the roof body. The airbag is formed by separating the head lining from the roof body by pressing the head lining so as to release the locked state when the airbag is inflated. The gist of the invention is that it swells into the vehicle compartment from the opening.

  According to the above configuration, when releasing the state in which the head lining is locked to the roof body in the initial stage of inflation of the airbag, the pressing force for the release can be quickly increased, and the airbag is inflated. The opening to be formed can be formed early.

In the invention according to any one of claims 1 to 4 , as in claim 5 , an airbag including an airbag body that inflates and deploys between a rearmost seat of a vehicle and a rear window is a vehicle. The present invention can be applied to a device housed inside the rear end of the roof, that is, a so-called rear impact airbag device.

  According to the airbag apparatus according to the present invention, the airbag can be deployed at an early stage.

Hereinafter, an embodiment in which an airbag device according to the present invention is embodied will be described.
Here, first, a schematic configuration of the airbag apparatus according to the present embodiment will be described.
FIG. 1 shows a side structure of a rear portion of a vehicle on which the airbag apparatus according to the present embodiment is mounted, and FIG. 2 shows a rear structure of the vehicle.

  As shown in FIGS. 1 and 2, the airbag 30 is accommodated in a folded state between the roof panel 11 at the rear portion of the vehicle 10 and the headlining 12 positioned on the vehicle lower side. Further, an inflator 40 that generates gas for inflating the airbag 30 is provided on the vehicle upper side of the airbag 30 between the roof panel 11 and the headlining 12 and on the front side of the vehicle. Yes.

  A sensor 14 that outputs a signal when a predetermined impact or more is applied to the rear portion of the vehicle 10 is provided at the rear portion of the vehicle 10 (for example, the rear bumper 13). The output signal of the sensor 14 is input to the control device 15, and the control device 15 outputs an operation signal to the inflator 40 based on the signal input from the sensor 14. The inflator 40 receives the operation signal from the control device 15 and generates gas. The generated gas is supplied into the airbag 30, so that the airbag 30 is inflated and deployed toward the rear and the lower side of the vehicle 10. As shown by a two-dot chain line in FIGS. 1 and 2, the airbag 30 after being inflated and deployed is positioned between the rearmost seat 16 of the vehicle 10 and the rear window 17. As described above, the airbag device according to the present embodiment is a so-called rear impact airbag device including the airbag 30 that is inflated and deployed between the rearmost seat 16 of the vehicle 10 and the rear window 17.

Next, the airbag 30 will be described in detail.
FIG. 3 shows the airbag 30 in the deployed state.
As shown in FIG. 3, the airbag 30 includes a gas introduction passage 31. This gas introduction passage 31 constitutes a portion of the airbag 30 on the vehicle upper side and the vehicle front side (upper end in FIG. 3) and on the inflator 40 side of the airbag 30 in the deployed state. One end of the gas introduction passage 31 communicates with the inflator 40 (specifically, the gas outlet 41), and the other end is in the airbag 30 and is inflated between the rearmost seat 16 and the rear window 17. It communicates with the part to be deployed (airbag body 32). In the airbag 30, the boundary between the gas introduction passage 31 and the airbag body 32 serves as a gas inlet 33, and the gas generated by the inflator 40 is passed through the gas inlet 33. It flows into the bag body 32.

  At the end of the airbag body 32 on the gas inlet 33 side, when the airbag 30 is inflated and deployed, the vehicle width on the vehicle lower side and the vehicle rear side (lower side in FIG. 3) from the gas introduction passage 31. A lateral cell 34 extending in the direction is formed. Further, at both ends of the airbag body 32 in the width direction (in the present embodiment, the same as the vehicle width direction), a side vertical cell extending from the lateral cell 34 to the vehicle rear side and the vehicle lower side. 35 are formed. Further, two center vertical cells 36 extending from the horizontal cell 34 to the vehicle rear side and the vehicle lower side are formed at the center of the horizontal cell 34 in the vehicle width direction. The gas introduction passage 31 communicates with the horizontal cell 34, and the horizontal cell 34 communicates with each side vertical cell 35 and each center vertical cell 36.

  The airbag 30 is formed by sewing a base fabric together. The gas introduction passage 31 is formed in a substantially cylindrical shape when the airbag 30 is inflated and deployed. In the airbag main body 32, portions corresponding to the horizontal cell 34, the side vertical cell 35, and the center vertical cell 36 are each formed in a bag shape. Further, a portion of the airbag main body 32 between the center vertical cell 36 and the side vertical cell 35 located on the side thereof is formed so that the cells 35 and 36 are connected by a single base fabric. ing.

  The airbag 30 is configured so that each center vertical cell 36 is positioned between the two headrests 16a arranged in the vehicle width direction in the rearmost seat 16 of the vehicle 10, and each side vertical cell 35 has two headrests 16a. Inflate and deploy so as to be located outside in the vehicle width direction. Further, a sheet-like portion (seat portion 37) between the center vertical cell 36 and the side vertical cell 35 is deployed on the vehicle rear side of the headrest 16a when the airbag 30 is inflated and deployed. The gap between the headrest 16a and the rear window 17 (see FIG. 1) is blocked.

  The airbag 30 (FIG. 3) is formed in a double structure including the airbag body 32 and an inner tube 38 that expands inside the airbag body 32. Specifically, the inner tube 38 has a substantially cylindrical shape when the airbag 30 is inflated and deployed, and a portion (introduction portion 38a) extending in the same direction as the gas introduction passage 31 inside the gas introduction passage 31 and the airbag. It is comprised by the part (distribution part 38b) extended linearly in the vehicle width direction inside the horizontal cell 34 of the main body 32. As shown in FIG. The distributor 38b of the inner tube 38 is open at both ends in the vehicle width direction toward the side vertical cell 35. Further, a hole 38c that opens toward each center vertical cell 36 is formed in an intermediate portion in the vehicle width direction of the distribution portion 38b of the inner tube 38.

  In the present embodiment, the gas generated by the inflator 40 flows into the distribution portion 38b after passing through the introduction portion 38a of the inner tube 38, and enters the side vertical cell 35 from the openings at both ends in the vehicle width direction of the distribution portion 38b. While flowing in, it flows into each center vertical cell 36 from each hole 38c of the distribution part 38b. Thus, in the present embodiment, the gas generated by the inflator 40 is distributed to the side vertical cells 35 and the center vertical cells 36 by the inner tube 38. The inner tube 38 is formed of the same base fabric as the airbag main body 32, and is formed by sewing the base fabric together with the base fabric constituting the airbag main body 32. In the present embodiment, the inner tube 38 corresponds to an inner bag that functions as a communication path that connects a plurality of portions inside the airbag 30 and the gas inlet 33 of the airbag 30.

  By providing such an inner tube 38, the flow of gas flowing into the airbag main body 32 from the gas inlet 33 is guided to both sides in the width direction of the airbag main body 32, and the width of the airbag 30 is increased. Occurrence of poor development in the direction can be suppressed.

  Attaching tools 39 are provided on both sides in the vehicle width direction at the edge of the airbag body 32 on the vehicle upper side and the vehicle front side. A fitting 39 is also provided at the edge of the airbag body 32 on the vehicle upper side and the vehicle front side. Each of these fixtures 39 is configured by a belt-like base fabric and a metal fitting fixed to the base fabric (so-called strap).

Next, the attachment portion of the airbag 30 in the vehicle 10 and the surrounding structure will be described.
FIG. 4 shows a cross-sectional structure along the line AA in FIG. 2 at the roof rear end portion of the vehicle 10.

  As shown in FIG. 4, a headlining 12 is attached to the roof panel 11 on the vehicle lower side. The headlining 12 is formed in a shape that covers substantially the entire surface of the roof panel 11 on the vehicle interior side. An inner panel 18 is provided between the roof panel 11 and the headlining 12, and the inner panel 18 is fixed to the roof panel 11. An end of the roof panel 11 on the vehicle rear side is formed in a bent shape so as to approach the inner panel 18 and is connected to an end of the inner panel 18 on the vehicle rear side. The rear roof rail 20 is used to support 19. In the present embodiment, the roof body of the vehicle 10 is configured by the roof panel 11 and the inner panel 18. The roof panel 11 and the inner panel 18 are both formed of a thin metal plate, and the head lining 12 is formed of a flexible resin material.

  A back door 19 is attached to the rear roof rail 20 via a hinge mechanism 21. As a result, the back door 19 can be opened and closed around the end of the roof panel 11 on the vehicle rear side (rear roof rail 20). The back door 19 is provided with the rear window 17. In the present embodiment, the back door 19 functions as a body side wall of the vehicle that is deployed so that the airbag is along.

  The head lining 12 is attached to the roof panel 11 so as to be pivotable to the vehicle lower side (the lower side in FIG. 4) around the front side of the vehicle relative to the fixed portion of the inner panel 18 with respect to the roof panel 11. ing. Further, the head lining 12 is locked to the inner panel 18 at the rear side of the vehicle.

FIG. 5 shows a cross-sectional structure of the roof of the vehicle 10 in a portion where the headlining 12 is locked to the inner panel 18.
As shown in FIG. 5, the head lining 12 has a through hole 12 a. An engagement port 18a is formed at a position corresponding to the through hole 12a of the inner panel 18. When the head lining 12 is attached, the locking tool 22 is fitted into the engagement port 18 a of the inner panel 18 in a state of being inserted into the through-hole 12 a of the head lining 12. As a result, the headlining 12 is locked to the inner panel 18.

  Note that when the airbag 30 is inflated, the locking member 22 is pressed downward by the head lining 12 when the head lining 12 is pressed by the airbag 30 from the engagement port 18a. It is coming off. And the state in which the headlining 12 was latched by the inner panel 18 is cancelled | released by the latching tool 22 dropping off like that.

  As shown in FIG. 4, the airbag 30 and the inflator 40 in a folded state are accommodated in the vehicle lower side portion of the inner panel 18 between the roof panel 11 and the headlining 12. The inflator 40 is fixed between a portion of the roof panel 11 and the headlining 12 that is less deformed when an impact is applied from the rear of the vehicle 10 (a portion of the inner panel 18 having high rigidity). Further, the inflator 40 is provided such that a gas jet port 41 (not shown) is located in the gas introduction passage 31 of the airbag 30. The airbag 30 has a fixture 39 fixed to the inner panel 18 and is attached to a position on the vehicle lower side and the vehicle rear side of the inflator 40.

Here, the airbag 30 is folded in the following manner.
A portion of the airbag 30 close to the gas introduction passage 31 (the bellows portion 30a) is folded in a bellows shape. Specifically, the airbag main body 32 is folded together with the inner tube 38 at a position along the extending direction of the distribution portion 38b of the inner tube 38 (position indicated by a line L1 in FIG. 3). Specifically, the airbag main body 32 is folded at the central portion in the passage width direction of the distribution portion 38b of the inner tube 38, and only on one side of the inner tube 38 divided into two passages by being folded in this way. A gas inlet 33 is communicated. Further, the airbag body 32 is folded in a direction opposite to the bending direction at the position L1 at a position farther from the gas introduction passage 31 than the position L1 (a position indicated by a line L2 in FIG. 3).

  On the other hand, the part (roll part 30b) far from the gas introduction passage 31 of the airbag 30 is folded in a roll shape. Specifically, the airbag 30 is folded in a spiral shape in a state where the airbag 30 is folded at positions at predetermined intervals (positions indicated by lines L3, L4, L5, and L6 in FIG. 3).

The airbag 30 is inflated and deployed in the manner described below.
That is, first, when the gas generated by the inflator 40 (FIG. 4) flows into the folded airbag 30, the bellows portion 30a of the airbag 30 is inflated, thereby pressing the headlining 12 toward the vehicle interior side. . As a result, the locking tool 22 of the head lining 12 falls off from the engagement port 18 a of the inner panel 18.

  Thereafter, the head lining 12 is further pressed by the inflated airbag 30, so that the head lining 12 is located on the vehicle interior side with respect to the front side of the vehicle relative to the bellows portion 30 a (specifically, an arrow B in FIG. (In the direction indicated by). As a result, the end of the head lining 12 on the vehicle rear side is displaced to the vehicle lower side as shown in FIG. The panel 18 is spaced apart to form an opening.

  Then, with the subsequent gas inflow into the airbag 30, the roll portion 30 b of the airbag 30 rolls out from the vehicle rear side end portion of the headlining 12 toward the vehicle rear side and the vehicle lower side. It expands while expanding.

  The airbag 30 after being inflated and deployed in this manner is in the state shown in FIG. As can be seen from FIG. 7, the airbag 30 is deployed and inflated on the vehicle rear side (right side in FIG. 7) with respect to the rearmost seat 16. In the airbag 30 after being inflated and deployed, each center vertical cell 36 is positioned between the two headrests 16a of the rearmost seat 16, and each side vertical cell 35 is in the vehicle width direction of the two headrests 16a. It is located outside (vertical direction in FIG. 7). At this time, the seat portion 37 between the center vertical cell 36 and the side vertical cell 35 is located on the vehicle rear side with respect to the headrest 16a. By deploying the seat portion 37 in this manner, the space between the headrest 16a and the rear window 17 of the back door 19 is cut off, and the front vertical cells 35 and the center vertical cells 36 are deployed at the front of the vehicle. Shift to the side is suppressed.

Hereinafter, the operation of the airbag apparatus according to the present embodiment will be described.
In the present embodiment, the airbag 30 (specifically, the airbag body 32) is housed inside the roof of the vehicle 10 in a state where the airbag 30 is folded together with the inner tube 38 at a position along the extending direction of the inner tube 38. Yes. Moreover, in this Embodiment, the gas inflow port 33 is connected only to the one side of the inner tube 38 divided | segmented into two channel | paths by folding.

  Therefore, the cross-sectional area of the portion through which the gas in the inner tube 38 passes (the portion indicated by “PA” in FIG. 3) in the initial stage of inflation of the airbag 30 is the same as the above portion in the device in which the airbag body is not folded back with the inner tube ( This is smaller than the cross-sectional area of “PB” in FIG. In addition, at this time, the communication between the gas inlet 33 and the hole 38c of the inner tube 38 is substantially blocked, and the communication between each part inside the airbag body 32 and the gas inlet 33 by the inner tube 38 is maintained. .

  Here, since the amount of gas generated by the inflator 40 is constant regardless of how the airbag 30 is folded, by reducing the cross-sectional area of the portion through which the gas passes in the inner tube 38 as described above, The amount of gas passing per unit area increases. Therefore, in the present embodiment, the internal pressure of the above portion quickly rises at the initial stage of inflation of the airbag 30, and the maximum value of the internal pressure also increases. As a result, when the airbag 30 is inflated, the force with which the airbag 30 presses the head lining 12 quickly increases.

  Therefore, in the present embodiment, the state in which the locking tool 22 is quickly removed from the engagement port 18a and the head lining 12 is locked to the inner panel 18 is quickly released, and the head lining 12 is moved to the vehicle interior side. Deforms early. Thus, an opening through which the airbag 30 bulges is formed at an early stage, and the airbag 30 can be deployed at an early stage.

  Instead of folding the airbag body 32 together with the inner tube 38, it is also possible to adopt an inner bag having a small passage cross-sectional area. In such a configuration, it is possible to quickly increase the inner pressure of the inner bag in the early stage of inflation of the airbag, but the gas passing through the inner bag because the passage resistance in the inner bag becomes larger in the later stage of inflation of the airbag. In such a case, the air bag deployment speed may be reduced.

  In this regard, in the airbag apparatus according to the present embodiment, in the initial stage of inflation of the airbag 30, the internal pressure of the portion can be quickly increased by reducing the cross-sectional area of the portion through which the gas passes in the inner tube 38. Can do. Further, in the latter stage of inflation of the airbag 30, a sufficient amount of gas can be suitably distributed to each part of the airbag 30 by increasing the cross-sectional area of the above portion.

As described above, according to the present embodiment, the effects described below can be obtained.
(1) The airbag 30 is accommodated in a state where the airbag body 32 is folded together with the inner tube 38 at a position along the extending direction of the inner tube 38. Therefore, when the airbag 30 is inflated, the force by which the airbag 30 presses the head lining 12 can be quickly increased to deform the head lining 12 early, and the airbag 30 can be deployed early.

  (2) When releasing the state in which the head lining 12 is locked to the inner panel 18 in the initial stage of inflation of the airbag 30, the pressing force for the release can be quickly increased, and the airbag 30 is inflated. The opening to exit can be formed early.

  (3) An inner tube 38 that guides the flow of inflowing gas to both sides of the airbag body 32 in the width direction is provided in the airbag device provided inside the airbag body 32, and the width direction of the airbag body 32 is The airbag 30 can be deployed at an early stage while suppressing the occurrence of poor deployment.

The embodiment described above may be modified as follows.
The air bag device according to the above embodiment is a device in which the head lining 12 is attached to the inner panel 18 through the engagement of the head lining 12 and the inner panel 18 or by attaching the head lining 12 to the inner panel 18. The present invention can also be applied to an apparatus in which the headlining 12 is attached to the inner panel 18.

  The airbag body 32 may be folded together with the inner tube 38 at a position closer to the gas inlet 33 than the central portion in the passage width direction of the distribution portion 38b of the inner tube 38. Even in such a configuration, a portion through which gas passes in the inner tube 38 as compared with the configuration in which the airbag main body 32 is folded at a position farther from the gas inlet 33 than the central portion, as in the above embodiment. It is possible to reduce the cross-sectional area. Therefore, the pressure inside the inner tube 38 can be increased early, and the airbag 30 can be deployed early.

  The airbag body 32 may be folded together with the inner tube 38 at a position farther from the gas inflow port 33 than the central portion in the passage width direction of the distribution portion 38b of the inner tube 38.

  The present invention can also be applied to an apparatus including an airbag that inflates and deploys between a vehicle seat and a side window, that is, a so-called side curtain airbag apparatus.

The side view which shows the side structure of the rear part of the vehicle with which the airbag apparatus concerning this invention is applied. The rear view which shows the back surface structure of the vehicle. The top view which shows the planar structure of the airbag of the expansion | deployment state. Sectional drawing which shows the cross-section along the AA line of FIG. 2 in the roof rear-end part of a vehicle. Sectional drawing which shows the cross-section of the roof of the vehicle in the part by which the headlining is latched by the inner panel. Sectional drawing which shows the cross-sectional structure of the roof rear end part of the vehicle in the expansion | swelling process of an airbag. The schematic diagram which shows the expansion | deployment position of the airbag after inflation deployment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Roof panel, 12 ... Head lining, 12a ... Through-hole, 13 ... Rear bumper, 14 ... Sensor, 15 ... Control device, 16 ... Rear seat, 16a ... Headrest, 17 ... Rear window, 18 ... Inner panel, 18a ... engagement port, 19 ... back door, 20 ... rear roof rail, 21 ... hinge mechanism, 22 ... locking device, 30 ... airbag, 30a ... bellows part, 30b ... roll part, 31 ... gas introduction passage, 32 ... Airbag body, 33 ... Gas inlet, 34 ... Horizontal cell, 35 ... Vertical cell for side, 36 ... Vertical cell for center, 37 ... Sheet part, 38 ... Inner bag, 38a ... Introducing part, 38b ... Distributing part 38c ... holes, 39 ... fixtures, 40 ... inflators, 41 ... gas outlets.

Claims (5)

The airbag has a double structure including an airbag body that is deployed between a vehicle seat and a body side wall of the vehicle, and an inner bag that is inflated inside the airbag body. It functions as a communication path that communicates the inflow port with the plurality of internal parts, and is stored in a folded state between the roof body of the vehicle and the head lining, and when expanded In the airbag apparatus provided with what bulges in the vehicle interior by pressing the head lining toward the vehicle interior and deforming it,
The airbag body includes a horizontal cell that communicates with the gas inlet and extends in the vehicle left-right direction, a side vertical cell that communicates with both lateral ends of the horizontal cell and extends toward the vehicle lower side, and the horizontal cell. A vertical cell for the center that communicates with the vehicle laterally central portion and extends to the vehicle lower side,
Between the vertical cell for the side and the vertical cell for the center, a sheet-like seat portion is formed, and the seat portion is deployed at the position of the headrest when the airbag is inflated and deployed.
The inner bag communicates with the gas inlet and extends in the lateral direction of the vehicle inside the horizontal cell.
The airbag, the a line along the extending direction of the vehicle transverse direction of the inner bag, an air bag device, wherein the airbag body is housed in a folded state the inner bag in company. The airbag has a double structure comprising an airbag body that is deployed between a vehicle seat and a vehicle body side wall, and an inner bag that is inflated inside the airbag body. It functions as a communication path that communicates the inlet and the plurality of internal parts, and is stored in a folded state between the roof body of the vehicle and the head lining, and the In an airbag device provided with a device that bulges into the passenger compartment by pressing and deforming the head lining toward the passenger compartment,
The airbag body is deployed in a direction along the side wall of the body,
The inner bag is a portion functioning as the communication path, and has a portion extending in the left-right direction of the vehicle inside the airbag body, and an end portion of the same portion in the left-right direction of the vehicle is opened. Become
The airbag is stored in a state in which the airbag body is folded along with the inner bag along a line extending in the vehicle lateral direction of the inner bag.
The airbag device according to claim 1, wherein a line along a direction in which the inner bag extends in the left-right direction of the vehicle is a central portion of the portion in the passage width direction . The airbag has a double structure comprising an airbag body that is deployed between a vehicle seat and a vehicle body side wall, and an inner bag that is inflated inside the airbag body. It functions as a communication path that communicates the inlet and the plurality of internal parts, and is stored in a folded state between the roof body of the vehicle and the head lining, and the In an airbag device provided with a device that bulges into the passenger compartment by pressing and deforming the head lining toward the passenger compartment,
The airbag body is deployed in a direction along the side wall of the body,
The inner bag is a portion functioning as the communication path, and has a portion extending in the left-right direction of the vehicle inside the airbag body, and an end portion of the same portion in the left-right direction of the vehicle is opened. Become
The airbag is stored in a state in which the airbag body is folded along with the inner bag along a line extending in the vehicle lateral direction of the inner bag.
The airbag device according to claim 1, wherein a line along a direction in which the inner bag extends in the vehicle left-right direction is a position closer to the gas inlet than a central portion in the passage width direction of the portion . In the airbag apparatus as described in any one of Claims 1-3,
The head lining is formed of a flexible material and is locked to the roof body.
The airbag presses the head lining so as to release the locked state when the airbag is inflated, and separates the head lining from the roof main body. An airbag device characterized by being inflated indoors. In the airbag apparatus as described in any one of Claims 1-4 ,
The airbag is housed inside the rear end of the roof of the vehicle,
The airbag apparatus is characterized in that the airbag body is inflated and deployed between a rearmost seat and a rear window of the vehicle.

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