JP2019199171A - Airbag device - Google Patents

Abstract

To achieve improvement of occupant protection performance by a bag body having a head protection part.SOLUTION: An airbag device includes an airbag 40 having a bag body 41 which is deployed and expanded by an expansion gas supplied from a gas generator 30. The bag body 41 is fixed to a vehicle seat 13 with the gas generator 30 at a fixing part set at a rear end part of itself. The bag body 41 is deployed and expanded from the fixing part to the oblique front upper side at the side of the vehicle seat 13 by the expansion gas supplied from the gas generator 30 to protect an occupant P1 seated in a normal posture on the vehicle seat 13 from an impact when the impact is applied to a side wall part of the vehicle from the side. The bag body 41 has a head protection part 46 which is deployed and expanded at the side of a head PH of the occupant P1. A first exhaust mechanism 81 which exhausts the expansion gas to the outer side is provided at a peripheral edge part of the head protection part 46.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an airbag on the side of an occupant seated on a vehicle seat when an impact is applied from the side to a side wall of a vehicle such as a vehicle or when an impact is predicted to be applied. The airbag device is deployed and inflated to protect at least the head of an occupant from impact.

  As a device for protecting an occupant seated on a vehicle seat when an impact is applied to the vehicle from the side due to a side collision or the like, an airbag device including an airbag having a bag body and a gas generator is provided. Widely known. The bag body is fixed in the seat back of the vehicle seat together with the gas generator at a fixing portion set at the rear end of the bag. When an impact is applied to the side wall of the vehicle, such as a side door, from the side due to a side collision or the like, inflation gas is supplied from the gas generator to the bag body. The inflating gas expands and inflates the bag body, and jumps out of the vehicle seat with a part left in the seat back. Thereafter, the bag body is deployed and inflated on the side of the vehicle seat. The upper body of the occupant is restrained by the bag body, and the impact from the side transmitted to the upper body is reduced.

  As one form of the airbag device, for example, Patent Document 1 describes a device having a head protection part at the top of a bag body. The head protecting portion protects the head from impact by deploying and expanding on the side of the occupant's head. In this airbag device, a structure is further provided for limiting the inflated thickness of the head protecting portion in the vehicle width direction.

  In the airbag device, the head protection part is far from the gas generator, and the inflating gas ejected from the gas generator reaches the head protection part, and the head protection part completes deployment and inflation. It takes time to do. Therefore, the airbag apparatus prevents the inflation gas from being exhausted in order to prevent the time for deployment and inflation from becoming long.

Japanese Patent Laid-Open No. 2006-88349

  However, in the airbag device described in Patent Document 1, it is possible to prevent the bag body from being expanded and expanded, but the internal pressure of the head protecting portion is increased. When the occupant is restrained by the bag body, the reaction force that the head receives from the head protection portion may increase, and there is room for improvement in terms of occupant protection performance.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an airbag device capable of improving occupant protection performance by a bag body having a head protection portion. .

  An airbag device that solves the above problem includes an airbag having a bag body that is deployed and inflated by an inflation gas supplied from a gas generator, and the bag body has a vehicle seat on which a vehicle seat is disposed. The bag body is fixed together with the gas generator at a fixed portion set at the rear end of the vehicle, and the bag body is predicted to receive an impact from the side of the vehicle side wall or from the side. When the vehicle seat is expanded, the expansion gas supplied from the gas generator is expanded and inflated obliquely forward and upward from the fixed portion on the side of the vehicle seat. An airbag device that protects an occupant seated in the posture from an impact, and the bag body has a head protecting portion that is deployed and inflated on a side of the occupant's head, Serial to the periphery of the head protecting portion, an exhaust mechanism for exhausting the inflation gas toward the outside is provided.

  According to the above configuration, when an impact is applied to the side wall portion of the vehicle due to a side collision or the like, or an impact is predicted to be applied from the side, the inflation gas is supplied from the gas generator to the bag body. To be supplied. With this inflation gas, the bag body is expanded and inflated obliquely forward from the fixed portion on the side of the vehicle seat. The upper body of the occupant is restrained by the bag body, and the impact from the side transmitted to the upper body is reduced.

  By the way, a part of the inflation gas in the head protecting portion is exhausted to the outside through the exhaust mechanism. Therefore, the internal pressure of the head protecting portion is lower than when no exhaust mechanism is provided. When the occupant is restrained by the bag body, the reaction force that the head receives from the head protecting portion is reduced, and the occupant protection performance is improved.

  Here, if the exhaust mechanism is provided at a location different from the peripheral portion of the head protection portion, for example, at the side, the expansion gas is supplied to the exhaust mechanism during the expansion and expansion of the head protection portion. It reaches and is exhausted to the outside of the head protection part through the exhaust mechanism. This exhausting reduces the speed of expansion and expansion of the bag body.

  On the other hand, as described above, when the exhaust mechanism is provided at the peripheral portion of the head protecting portion, the expansion gas is exhausted after the portion different from the peripheral portion of the head protecting portion is expanded and expanded. Reach mechanism. Compared with the case where the exhaust mechanism is provided at a location different from the peripheral portion of the head protection portion, the exhaust gas exhaust start timing is delayed. Accordingly, the influence of the expansion gas exhaust on the expansion and expansion speed of the bag body is reduced.

In the airbag apparatus, the exhaust mechanism is preferably provided at an upper end portion of the head protecting portion and exhausts the inflation gas upward.
As described above, when the exhaust mechanism is provided at the upper end portion of the head protecting portion, the expansion gas reaches the exhaust mechanism after the portion different from the peripheral portion of the head protecting portion is expanded and expanded. To do. Compared with the case where the exhaust mechanism is provided at a location different from the peripheral portion of the head protection portion, the exhaust gas exhaust start timing is delayed.

  In the airbag apparatus, the bag body has a front lower protection part that expands and inflates on at least one side of the chest and abdomen of the occupant, and the exhaust mechanism in the head protection part is the first exhaust mechanism. In the case of the exhaust mechanism, the inflating gas is provided at the periphery of the front lower protection portion as a part of the exhaust mechanism for exhausting the expansion gas in the bag body from the front lower protection portion toward the front. It is preferable that a second exhaust mechanism for exhausting the air is provided.

  In the airbag device, since the bag body has the head protecting portion at the top, the bag body is longer than when the bag body is not provided. Since the head protection part is far away from the gas generator, when the bag body starts to expand and inflate, the bag body swings forward with the fixing part as a fulcrum by the inflation gas from the gas generator. Subsequently, by the reaction of the forward swing, the bag body swings backward with the fixed portion as a fulcrum. When the bag body swings in the front-rear direction as described above, it is difficult to position the bag body in a stable posture on the side of the occupant.

  In this regard, according to the above configuration, not only a part of the expansion gas in the head protection part is exhausted through the first exhaust mechanism, but also a part of the expansion gas in the front lower part protection part is the second exhaust mechanism. Exhausted through. Moreover, the flow direction of the expansion gas in the first exhaust mechanism is different from the flow direction of the expansion gas in the second exhaust mechanism. Therefore, it is possible to suppress the back-and-forth swing of the bag body as compared with the case where the inflation gas is exhausted only from the first exhaust mechanism.

  As described above, when the second exhaust mechanism is provided at the peripheral portion of the front lower protection portion, after the portion of the front lower protection portion that is different from the peripheral portion is expanded and expanded, the expansion gas is 2 Reach the exhaust mechanism. Compared with the case where the second exhaust mechanism is provided at a location different from the peripheral portion of the front lower protection portion, the exhaust gas start timing of the expansion gas is delayed. Accordingly, the influence of the expansion gas exhaust from the second exhaust mechanism on the speed of expansion and expansion of the bag body is reduced.

  In the airbag device, at least the head protecting portion in the bag body, and an inflated thickness regulating portion for regulating an inflated thickness in the width direction of the vehicle is provided at a plurality of locations separated from each other in the front-rear direction. The first exhaust mechanism is preferably provided between adjacent expansion thickness regulating portions in the front-rear direction.

  According to the above configuration, when at least the head protecting portion in the bag body is deployed and inflated, the inflated thickness in the width direction of the vehicle protects at least the head by the inflating thickness regulating portions provided at a plurality of locations. It is regulated to a size suitable for.

  Here, the inflation gas generated by the gas generator is supplied diagonally forward and upward in the bag body. By this inflation gas, the bag body expands and inflates from the fixed portion toward the diagonally upward front. As described above, when the first exhaust mechanism is provided between the adjacent expansion thickness regulating portions in the front-rear direction, the expansion is performed when the expansion gas flows from the gas generator toward the first exhaust mechanism. The thickness restricting portion is unlikely to obstruct the gas flow, and the expansion gas in the head protecting portion is smoothly exhausted from the first exhaust mechanism.

  In the airbag apparatus, among the plurality of inflation thickness regulating portions, at least the most inflated inflation thickness regulating portion regulates the inflation thickness of the front lower protection portion in addition to the head protection portion, The front lower protective portion is provided with a communication path that communicates a region adjacent to the front and rear with the expansion thickness restricting portion positioned at the foremost side below the expansion thickness restricting portion. It is preferable that at least a part of the exhaust mechanism is located below the upper end of the communication path.

  According to the above configuration, a part of the inflation gas in the region behind the frontmost expansion thickness regulating portion in the bag body passes through the communication path below the inflation thickness regulating portion, Flows to the front area. Part of the inflation gas that has flowed to the front region is exhausted through the second exhaust mechanism. Here, at least a part of the second exhaust mechanism is located below the upper end of the communication path. Therefore, unlike the case where the entire second exhaust mechanism is positioned above the upper end of the communication path, the expansion gas that has passed through the communication path directly enters the second exhaust gas without greatly changing the flow direction. Exhausted from the mechanism.

  In the airbag apparatus, the bag body includes a pair of cloth portions that are arranged in the width direction of the vehicle and whose peripheral portions are joined by a peripheral joint portion, and the head protecting portion and the front lower protecting portion. The exhaust mechanism in at least one of the two has an exhaust hole formed by a portion between the peripheral portions of the cloth portions and released from the connection by the peripheral joint portion, and the exhaust hole is connected to the inside of the bag body. It is preferable that the expansion gas in the bag body is exhausted to the outside by communicating with the outside.

  According to the above configuration, the expansion gas does not reach the exhaust hole while the bag body is being expanded and expanded. In both the cloth portions, the portions on the outer peripheral side with respect to the exhaust holes are in contact with each other, and the expansion gas is hardly exhausted. When the inflation gas passes through the exhaust hole with the expansion and expansion of the bag body, the outer peripheral portions of the two cloth portions are separated from each other, and the inflation gas is exhausted.

  According to the airbag device, it is possible to improve the occupant protection performance by the bag body having the head protection portion.

1 is a diagram showing an embodiment embodied in a vehicle far-side airbag device, and is a partial plan view of a vehicle on which the airbag device is mounted. FIG. 1 is a cross-sectional view of a positional relationship among a vehicle seat, an airbag, an occupant, a center console box, and a side wall portion as viewed from the front of the vehicle in one embodiment. In one embodiment, the partial plane sectional view showing the internal structure of the side part of the seat back in which the air bag module was incorporated. The side view which shows the vehicle seat provided with the far side airbag apparatus with passenger | crew etc. in one Embodiment. The side view which looked at the airbag module from which the bag main body was made into the non-expanded deployment state from the passenger | crew (driver | operator) side in one Embodiment. In one embodiment, the sectional side view which shows the internal structure of the airbag module seen from the anti-occupant (driver | operator) side. (A) is a partial cross-sectional view taken along line 7a-7a in FIG. 6, and (b) is a part showing a state in which the bag body is inflated from the state of FIG. Sectional drawing. FIG. 8 is a partial cross-sectional view taken along line 8-8 in FIG. It is a figure which shows the modification embodied in the side airbag apparatus for vehicles, and is a side view which shows the vehicle seat provided with the airbag apparatus with a passenger | crew. The partial top view which shows the vehicle seat provided with the airbag apparatus in the modification of FIG. 9 with a passenger | crew and a side wall part.

Hereinafter, an embodiment embodied in a far side airbag device for a vehicle will be described with reference to FIGS.
In the following description, the forward direction of the vehicle is assumed to be the front and the reverse direction is assumed to be the rear. The up-down direction means the up-down direction of the vehicle, and the left-right direction is the vehicle width direction (vehicle width direction), which coincides with the left-right direction when the vehicle moves forward. In order to define the vehicle width direction, the side approaching the occupant may be referred to as “occupant side” and the side away from the occupant may be referred to as “anti-occupant side”. Furthermore, it is assumed that an occupant having a physique similar to a collision test dummy is seated in a normal posture on the vehicle seat.

  As shown in FIG. 1, both side portions in the vehicle width direction of a vehicle 10 as a vehicle are constituted by side wall portions 11 and 12 including doors, pillars, and the like. In the vehicle interior of the vehicle 10, a pair of vehicle seats 13 and 14 are arranged in the vehicle width direction as vehicle seats. The vehicle seat 13 on the side close to the side wall portion 11 functions as a driver's seat, and an occupant (driver) P1 sits there. The vehicle seat 14 on the side close to the side wall portion 12 functions as a passenger seat, and an occupant P2 sits there. A center console box 15 is disposed between the vehicle seats 13 and 14 in the passenger compartment. The vehicle seats 13 and 14 have the same configuration. Therefore, only one vehicle seat 13 will be described here, and the description of the vehicle seat 14 will be omitted. This also applies to the far side airbag device provided for each of the vehicle seats 13 and 14 and the side airbag device in the modified example.

  As shown in FIGS. 2 and 4, the vehicle seat 13 includes a seat cushion 16, a seat back 17 that is configured to stand up from the rear side of the seat cushion 16 and that can adjust an inclination angle, and a seat back 17. And a headrest 18 mounted on the head.

Next, the internal structure of the side part close to the adjacent vehicle seat 14 in the seat back 17 of the vehicle seat 13 will be described.
Inside the seat back 17, a seat frame forming the skeleton is arranged. As shown in FIG. 3, a part of the seat frame is disposed in a side portion of the seat back 17 that is close to the adjacent vehicle seat 14, and this portion (hereinafter referred to as “side frame portion 21”). Is formed by bending a metal plate or the like.

  A seat pad 22 made of an elastic material such as urethane foam is disposed on the front side of the seat frame including the side frame portion 21. A hard backboard 23 made of synthetic resin or the like is disposed on the rear side of the seat frame. The seat pad 22 is covered with a skin, but the skin is not shown in FIG.

  In the seat pad 22, a storage portion 24 is provided in the vicinity of the side closer to the adjacent vehicle seat 14 than the side frame portion 21. The storage unit 24 incorporates an airbag module ABM that forms a main part of the far-side airbag device.

  A slit 25 extends from the front portion of the storage portion 24 and close to the adjacent vehicle seat 14 toward the side that is obliquely forward and approaches the vehicle seat 14. The front portion of the seat pad 22 that is sandwiched between the corner portion 22c on the side close to the vehicle seat 14 and the slit 25 (the portion surrounded by a two-dot chain line in FIG. 3) is taken by the airbag 40. The fracture | rupture scheduled part 26 to be fractured | ruptured is comprised.

  As shown in FIGS. 3, 5, and 6, the airbag module ABM includes a gas generator 30 and an airbag 40 as main components. Next, each of these structural members will be described.

<Gas generator 30>
The gas generator 30 includes an inflator 31 and a retainer 32. Here, a type called a pyrotype is adopted as the inflator 31. The inflator 31 has a substantially cylindrical shape, and a gas generating agent (not shown) that generates the expansion gas G1 is accommodated therein. The inflator 31 has a gas ejection part 31a at its upper end. Further, a harness (not shown) serving as an input wiring for an operation signal to the inflator 31 is connected to the lower end portion of the inflator 31.

  As the inflator 31, instead of the pyro type using the gas generating agent, there is a type (hybrid type) in which the partition wall of the high pressure gas cylinder filled with the high pressure gas is broken with an explosive or the like and the expansion gas G1 is ejected. May be used.

  On the other hand, the retainer 32 functions as a diffuser that controls the direction in which the inflation gas G1 is ejected, and has a function of fastening the inflator 31 to the side frame portion 21 together with the airbag 40 and an inner tube 70 described later. It is. Most of the retainer 32 is formed in a substantially cylindrical shape by bending a plate material such as a metal plate.

  A bolt 33 extending to the occupant P1 side is fixed as a fixing member for attaching the retainer 32 to the side frame portion 21 at one location of the retainer 32 or at a plurality of locations separated from each other in the vertical direction.

<Airbag 40>
The airbag 40 includes a bag body 41, an inflated thickness regulating portion, an inner tube 70, and an outer tether 77. The expansion thickness restricting portion is for restricting the expansion thickness of the bag body 41 in the vehicle width direction, and includes a rear lower partition portion 50 and a pair of front upper partition portions 60. The rear lower partition part 50 and each front upper partition part 60 have a function of partitioning the bag body 41 into a plurality of inflatable parts in addition to regulating the inflated thickness.

<Bag body 41>
5 and 6 show the airbag module ABM in a state where the bag body 41 is deployed in a planar shape without being filled with the inflation gas G1 (hereinafter referred to as “non-inflated and deployed state”). However, FIG. 5 shows the airbag module ABM as viewed from the occupant (driver) side. FIG. 6 shows the internal structure of the airbag module ABM as viewed from the side opposite to the occupant (driver).

  The bag body 41 is a member that constitutes an outer shell portion of the airbag 40. As shown in FIGS. 5, 6, and 8, the bag body 41 folds one piece of cloth (also called a base cloth, panel cloth, etc.) in two along a fold line 42 set at the center thereof. In the vehicle width direction, the overlapped portions (a pair of cloth portions) are joined to form a bag shape. Here, in order to distinguish the above-described two overlapped cloth parts of the bag body 41, the one located on the side closer to the occupant P1 is referred to as the occupant side cloth part 43, and the one located on the side far from the occupant P1. The non-occupant side fabric portion 44 is assumed.

  The occupant side fabric portion 43 and the anti-occupant side fabric portion 44 are formed using a material that has high strength, is not easily stretched, is flexible, and can be easily folded, such as polyester yarn and polyamide yarn. Suitable woven fabrics are suitable.

  The coupling | bonding of the passenger | crew side cloth part 43 and the anti-occupant side cloth part 44 is made | formed in the periphery coupling | bond part 45 provided along those peripheral parts. The peripheral joint portion 45 is formed by sewing (sewing with a sewing thread) a portion of the peripheral portions of the occupant side fabric portion 43 and the counter occupant side fabric portion 44 excluding the rear end portion (the vicinity of the fold line 42). Has been. This also applies to various connecting portions 52, 53, 54, 62, 63, 64, 74, and 78 described later.

  Regarding the above sewing, in FIGS. 5 and 6, the sewing portion is represented by three line types. The first line type is a line in which a certain length of thick lines are intermittently arranged and represents a state in which the sewing thread is viewed from the side (see the peripheral joint 45 in FIG. 5). . The second line type is a line in which fine lines of a certain length (longer than a general broken line) are intermittently arranged, which is located at the back of a piece of cloth, for example, and is directly visible. The state of the sewing thread that is not (hidden) is shown (see the coupling portion 74 and the like in FIG. 5). The third line type is a line expressed by arranging points at regular intervals, and shows a cross-section of the sewing thread on the surface passing through the sewing portion (see the peripheral joint 45 in FIG. 6).

  In addition, the periphery coupling | bond part 45 may be formed by the means different from the sewing using the said sewing thread, for example, adhesion | attachment using an adhesive agent. This also applies to the various coupling portions 52, 53, 54, 62, 63, 64, 74, and 78.

  As shown in FIGS. 4-6, the bag main body 41 has the head protection part 46 in the upper part. The head protecting part 46 protects the head PH from impact by expanding and expanding on the side of the head PH of the occupant P1. The bag body 41 has a front lower protection part 47 on the front lower side of the head protection part 46. The front lower part protection part 47 protects the chest part PT from impact by expanding and inflating on the side of the breast part PT of the occupant P1. The lower end portion of the bag main body 41 is positioned below the upper end of the center console box 15 when the bag main body 41 is deployed and inflated (see FIG. 2). In the bag body 41, the rear end portion is set as a fixing portion that is fixed to the side frame portion 21. As shown in FIGS. 5 and 6, an insertion port 48 of the gas generator 30 is formed in the lower part of the bag body 41 and above the lower end part.

<Rear lower compartment 50>
The rear lower section 50 is disposed at a location that is spaced diagonally forward and upward with respect to the gas generator 30. The rear lower section 50 includes a pair of cloth parts 51 made of the same material as the bag body 41 and independent of each other.

  As shown in FIGS. 5, 6, and 8, the occupant side fabric portion 51 is coupled to the occupant side fabric portion 43 adjacent thereto by a coupling portion 52. The coupling portion 52 extends along the rear edge of the occupant-side fabric portion 51. Similarly, the non-occupant side fabric portion 51 is coupled to the adjacent anti-occupant side fabric portion 44 by a coupling portion 53. The coupling portion 53 extends along the rear edge portion of the cloth portion 51 on the non-occupant side. Both the cloth parts 51 are mutually connected by the connection part 54 provided along the front edge part of both the cloth parts 51 which is a location away from both the connection parts 52 and 53. Both ends of the coupling portion 54 are spaced apart from the peripheral coupling portion 45.

  With such a coupling mode, the rear lower section 50 is bridged between the occupant side cloth portion 43 and the anti-occupant side cloth portion 44. In the rear lower section 50, when the bag body 41 is in a non-inflated and deployed state, both the cloth parts 51 are overlapped in the vehicle width direction. Further, the rear lower section 50 is in a tension state with the expansion and expansion of the bag body 41, thereby regulating the expansion thickness in the vehicle width direction of the bag body 41 in the vicinity of the rear lower section 50. Further, the rear lower section 50 is configured such that the bag body 41 is positioned on the upper front side of the rear lower expansion section 55 via the rear lower expansion section 55 and the rear lower expansion section 55, and the head protection section 46 and A front upper expansion part 56 having a front lower protection part 47 is partitioned.

  A front lower end portion of the rear lower partition portion 50, more specifically, a space between the front lower end portion of the coupling portion 54 and the front lower portion of the peripheral edge coupling portion 45 constitutes a front lower communication passage 57. By the front lower communication passage 57, the rear lower expansion portion 55 and the front upper expansion portion 56 are communicated with each other at the front lower end portion of the rear lower partition portion 50. A rear upper end portion of the rear lower partition portion 50, more specifically, a space between the rear upper end portion of the coupling portion 54 and the rear upper portion of the peripheral edge coupling portion 45 constitutes a rear upper communication passage 58. By the rear upper communication passage 58, the rear lower expansion portion 55 and the front upper expansion portion 56 are communicated with each other at the rear upper end portion of the rear lower partition portion 50.

<Front upper section 60>
As shown in FIGS. 5, 6, and 7 (a), the front upper partition section 60 is located at two positions that are front and upper with respect to the rear lower partition section 50 and are spaced apart from each other in the front-rear direction. Has been. Each front upper section 60 is made of a material similar to that of the bag body 41 and is formed by a pair of cloth portions 61 that are independent from each other. Both cloth portions 61 are linear and are inclined at a steep angle with respect to the front-rear direction so that the upper portion is located on the front side. Both front upper partition parts 60 regulate the expansion thickness of the bag body 41 at the front lower protection part 47 in addition to the head protection part 46.

  In each front upper section 60, the occupant-side fabric portion 61 is coupled to the occupant-side fabric portion 43 adjacent thereto by a coupling portion 62. The coupling portion 62 extends along the rear edge of the occupant-side fabric portion 61. Similarly, the cloth portion 61 on the side opposite to the occupant is coupled to the opposite occupant side fabric portion 44 adjacent thereto by a coupling portion 63. The coupling portion 63 extends along the rear edge portion of the cloth portion 61 on the side opposite to the passenger. As shown in FIG. 4, the coupling parts 62 and 63 in the front upper partition section 60 on the front side are located in front of the center PHC of the head PH. The coupling parts 62 and 63 in the front upper partition section 60 on the rear side are located behind the center PHC.

  As shown in FIGS. 5, 6, and 7 (a), in each front upper partition 60, both cloth parts 61 are the front edges of both cloth parts 61 that are spaced apart from both coupling parts 62, 63. They are coupled to each other by a coupling portion 64 provided along the portion. A front upper end portion of the coupling portion 64 is separated from the peripheral coupling portion 45, and a rear lower end portion of the coupling portion 64 is separated from the coupling portions 52 and 53.

  With such a coupling mode, each front upper section 60 is bridged between the occupant side cloth portion 43 and the anti-occupant side cloth portion 44. In each front upper division part 60, when the bag main body 41 is in a non-inflated and deployed state, both the cloth parts 61 are overlaid in the vehicle width direction. Moreover, each front upper division part 60 becomes a tension state with expansion | deployment and expansion | swelling of the bag main body 41, and regulates the expansion | swelling thickness of the vehicle width direction of the vicinity part of the front upper division part 60 in the bag main body 41 ( (Refer FIG.7 (b)). Furthermore, both front upper division parts 60 divide the front upper expansion part 56 into three areas adjacent to the front and rear.

  A front upper end portion of each front upper partition portion 60, more specifically, a space between the front upper end portion of the coupling portion 64 and the front upper end portion of the peripheral edge coupling portion 45 constitutes a front upper communication passage 65. By these front upper communication passages 65, the front and rear adjacent regions in the front upper expansion portion 56 are communicated with each other at the front upper end portion of each front upper partition portion 60.

  A rear lower end portion of each front upper partition section 60, more specifically, a space between the rear lower end section of the coupling portion 64 and the rear lower partition section 50 constitutes a rear lower communication path 66 as a communication path. . By these rear lower communication passages 66, the front and rear adjacent regions in the front upper expansion portion 56 are communicated with each other at the rear lower end portion of each front upper partition portion 60.

  In other words, each rear lower communication passage 66 serving as a communication passage is located in the front lower part protection portion 47 in a region adjacent to the front and rear sides of each front upper division portion 60 below the front upper division portion 60. Communicate.

<Inner tube 70>
As shown in FIGS. 5, 6, and 8, the inner tube 70 has a function of rectifying a part of the expansion gas G <b> 1 ejected from the gas ejection part 31 a of the gas generator 30 so as to be directed at least downward. Have. In order to form the inner tube 70, one piece of cloth formed of the same material as that of the bag body 41 is used. The cloth piece is folded in two along a fold line 71 set at the center in the vehicle width direction and overlapped in the vehicle width direction. Here, in order to distinguish the two overlapping portions of the inner tube 70, the part located on the occupant side is referred to as the cloth part 72, and the part located on the counter occupant side is referred to as the cloth part 73.

  The inner tube 70 is coupled to the bag body 41 at the rear edge portion by coupling means (not shown) such as stitching. Both cloth parts 72 and 73 are mutually connected by connecting part 74 provided along those front edge parts. The lower ends of the cloth portions 72 and 73 are not coupled to each other. This uncoupled portion constitutes an opening 75 on the lower side of the inner tube 70.

  Moreover, the opening 76 which consists of a hole is formed in the location above the said opening 75 of each fabric part 72,73. By these openings 75 and 76, the inside and the outside of the inner tube 70 communicate with each other in the rear lower inflating portion 55.

  And many parts except the lower part of the gas generator 30 are inserted through the insertion port 48, so that they are arranged at the rear end portion in the rear lower expansion portion 55 and at the rear end portion in the inner tube 70. ing. Further, both bolts 33 are inserted through the inner tube 70 and the bag body 41, respectively. With these insertions, the gas generator 30 is locked in a state of being positioned with respect to the inner tube 70 and the bag body 41.

<Outer tether 77>
As shown in FIGS. 5 and 8, the outer tether 77 is for suppressing the bag body 41 from swinging forward when the bag body 41 is deployed and inflated. The outer tether 77 is formed in a substantially fan shape using the same material as that of the bag body 41. The outer tether 77 is disposed at a location adjacent to the occupant side with respect to the occupant side cloth portion 43 of the bag body 41. The outer tether 77 is bridged between the bag body 41 and the gas generator 30. More specifically, the front end portion of the outer tether 77 is coupled to the occupant side fabric portion 43 by a coupling portion 78. The rear end portion of the outer tether 77 is locked to the bolt 33 of the retainer 32. The rear end portion of the outer tether 77 may be locked to a seat frame, for example, the side frame portion 21, instead of the bolt 33.

<Exhaust mechanism>
Further, in the present embodiment, as shown in FIGS. 4 to 6, exhaust mechanisms for exhausting the inflation gas G <b> 1 inside the bag body 41 to the outside are provided at two locations on the peripheral edge of the bag body 41. It has been. The two exhaust mechanisms include a first exhaust mechanism 81 and a second exhaust mechanism 83.

  The first exhaust mechanism 81 includes an exhaust hole 82 that allows the inside and the outside of the head protection unit 46 to communicate with each other at the periphery of the head protection unit 46. In the present embodiment, the peripheral edge coupling portion 45 is released from coupling at the upper end portion of the head protecting portion 46. The corresponding region is between the pair of front upper partition portions 60 described above, and is obliquely front upper above the center PHC of the head PH (see FIG. 4). The exhaust hole 82 is formed between the peripheral portions of the occupant-side cloth portion 43 and the counter-occupant-side cloth portion 44, and is formed by a portion where the connection by the peripheral connection portion 45 is released. The working gas G1 is exhausted upward in the outside of the head protecting portion 46.

  The second exhaust mechanism 83 includes an exhaust hole 84 that allows the inside and the outside of the front lower protection portion 47 to communicate with each other at the periphery of the front lower protection portion 47. In the present embodiment, the peripheral edge coupling portion 45 is released from the coupling at the front end portion of the front lower protection portion 47. The exhaust hole 84 is formed between the peripheral portions of the occupant-side cloth portion 43 and the counter-occupant-side cloth portion 44, and is formed by a portion where the connection by the peripheral connection portion 45 is released. The working gas G1 is exhausted forward.

  The whole of the second exhaust mechanism 83 is lower than the lower end 64a of the coupling portion 64 in the front upper partition 60 in the foremost row, in other words, the upper end of the two rear lower communication passages 66 located at the foremost side. Is located.

  Each of the first exhaust mechanism 81 and the second exhaust mechanism 83 includes a reinforcing cloth 85. The reinforcing cloth 85 reinforces the peripheral portions of the exhaust holes 82 and 84 so as to prevent the peripheral coupling portion 45 from being broken from the portion where the coupling is released. In the present embodiment, both the first exhaust mechanism 81 and the second exhaust mechanism 83 use two reinforcing cloths 85 that are overlapped with each other in the vehicle width direction, and these are the occupant side cloth part 43 and the anti-occupant. It is arranged between the side cloth portions 44. Each reinforcing cloth 85 is formed to be longer in the circumferential direction than the exhaust holes 82 and 84, and is joined to the occupant side cloth part 43 and the anti-occupant side cloth part 44 by co-sewing by the end of the peripheral edge coupling part 45. ing.

  The number of reinforcing cloths 85 arranged between the occupant side cloth part 43 and the counter occupant side cloth part 44 may be changed to 1 or 3 or more. Further, the reinforcing cloth 85 may be disposed outside the occupant side cloth part 43 and the counter occupant side cloth part 44 in the vehicle width direction.

  By the way, as shown in FIG. 3, the airbag module ABM has a compact configuration (hereinafter referred to as “storage configuration”) by folding an airbag 40 (see FIG. 5) in which the bag body 41 is in a non-inflated and deployed state. And is stored in the storage unit 24.

  As shown in FIGS. 3 and 5, the bolt 33 of the gas generator 30 is inserted into the side frame portion 21 from the side opposite to the passenger. By fastening the nut 34 to each bolt 33 from the passenger side, the fixing portion (rear end portion) of the bag body 41 and the rear end portion of the inner tube 70 are fixed to the side frame portion 21 together with the gas generator 30. ing.

  The far side airbag device includes an impact sensor 86 and a control device 87 shown in FIG. 4 in addition to the airbag module ABM described above. The impact sensor 86 includes an acceleration sensor or the like, and detects an impact applied to the vehicle 10 from the side. The control device 87 controls the operation of the inflator 31 based on the detection signal of the impact sensor 86.

Further, the vehicle 10 is provided with a seat belt device (not shown) for restraining the passengers P1, P2 to the vehicle seats 13, 14.
Next, the operation and effect of the present embodiment configured as described above will be described.

  As shown in FIG. 1, when an impact due to a side collision or the like is applied from one side to one side wall portion 12, the upper body of the passenger P <b> 1 far from the side wall portion 12 on which the impact is applied (driver's seat side) is caused by inertia. Try to fall into the side wall 12 side.

  Further, when the impact sensor 86 detects that an impact of a predetermined value or more is applied to the side wall portion 12 from the side, an operation signal is output from the control device 87 to the inflator 31 based on the detection signal. In response to this operation signal, as shown in FIGS. 5 and 6, when the expansion gas G1 is ejected from the gas ejection portion 31a of the inflator 31, the expansion gas G1 is first supplied to the inner tube 70. The inner tube 70 starts to expand.

  Part of the expansion gas G1 flows out of the inner tube 70 from the upper opening 76 in the rear lower expansion portion 55. Another part of the expansion gas G1 hits the inner wall surface of the inner tube 70, thereby changing the flow direction downward. The expansion gas G1 flows out of the inner tube 70 through the lower opening 75 in the rear lower expansion portion 55.

  In the rear lower expansion portion 55, the internal pressure is increased by supplying the expansion gas G <b> 1, and the rear lower expansion portion 55 starts expanding while releasing (deploying) the folded state. As the rear lower expansion portion 55 is expanded and expanded, the rear lower partition portion 50 is pulled to both sides in the vehicle width direction.

  Further, a part of the expansion gas G1 supplied to the rear lower expansion portion 55 passes through the rear upper communication passage 58 and the front lower communication passage 57, and has the head upper protection portion 46 and the front lower protection portion 47. It flows into the expansion part 56. The front upper expansion portion 56 starts expansion while releasing (deploying) the folded state behind the rear lower expansion portion 55. Each front upper section 60 is pulled to both sides in the vehicle width direction as the front upper expansion portion 56 is expanded and expanded.

  As described above, in the process in which the rear lower expansion portion 55 and the front upper expansion portion 56 are deployed and expanded, the seat pad 22 is pressed in the vicinity of the storage portion 24 in FIG. Is broken. The bag body 41 jumps out of the storage unit 24 in a state where the vicinity of the gas generator 30 is left in the storage unit 24.

  After that, as shown in FIGS. 2 and 4, the bag body 41 expands and expands from the rear end portion (fixed portion) thereof toward the front upper side between the adjacent vehicle seats 13 and 14. The expansion thickness in the vehicle width direction of the head protection part 46 is a size suitable for protecting the head PH by the both front upper partition parts 60 in the vicinity of the both front upper partition parts 60 with the expansion and expansion. Regulated by

  When the deployment and the expansion are completed, the bag body 41 is positioned between the occupants P1, P2 seated on the vehicle seats 13, 14. The lower end of the rear lower inflatable portion 55 is located between the occupant P1 seated on the vehicle seat 13 and the center console box 15. The bag main body 41 restrains the upper body of the occupant P1 who is about to fall into the side wall 12 on which the impact is applied, and the impact from the side transmitted to the upper body is reduced.

  As described above, the expansion and expansion of the bag body 41 are started in the order of the rear lower expansion portion 55 and the front upper expansion portion 56. Therefore, unlike the case where the rear lower section 50 is not provided and the bag body 41 is expanded and inflated all at once, the occupant is in front of the bag body 41 by the front upper portion (front upper inflating portion 56) at the initial stage of the expansion and expansion. It is possible to suppress the upper part of P1, for example, the head PH, from being pressed.

  By the way, as shown in FIGS. 4 and 6, a part of the expansion gas G <b> 1 supplied to the head protection unit 46 is exhausted to the outside through the exhaust hole 82 of the first exhaust mechanism 81. Therefore, the internal pressure of the head protecting portion 46 is lower than when the first exhaust mechanism 81 is not provided. When the occupant is restrained by the bag body 41, the reaction force received by the head PH from the head protecting portion 46 is reduced, and the occupant protection performance is improved. In addition, a part of the expansion gas G <b> 1 supplied to the front lower part protection part 47 is exhausted to the outside through the exhaust hole 84 of the second exhaust mechanism 83.

  Here, if the first exhaust mechanism 81 is provided at a location different from the peripheral edge portion of the head protecting portion 46, for example, at the side portion, The gas G1 reaches the exhaust hole 82 of the first exhaust mechanism 81 and is exhausted to the outside of the head protecting part 46 through the exhaust hole 82. This exhausting reduces the speed of expansion and expansion of the bag body 41.

  In addition, if the second exhaust mechanism 83 is provided at a location different from the peripheral portion of the front lower protection portion 47, for example, at a side portion, an expansion gas is generated during the expansion and expansion of the front lower protection portion 47. G1 reaches the exhaust hole 84 of the second exhaust mechanism 83 and is exhausted to the outside of the front lower part protection part 47 through the exhaust hole 84. This exhausting reduces the speed of expansion and expansion of the bag body 41.

  On the other hand, in this embodiment, since the first exhaust mechanism 81 is provided at the upper end portion of the peripheral portion of the head protecting portion 46, the exhaust hole is in the middle of expansion and expansion of the head protecting portion 46. 82 does not reach the expansion gas G1. In the occupant side cloth portion 43 and the counter occupant side cloth portion 44, the portions on the outer peripheral side with respect to the exhaust hole 82 are in contact with each other, and the inflation gas G1 is difficult to be exhausted. Similarly, since the second exhaust mechanism 83 is provided at the front end portion of the peripheral portion of the front lower protection portion 47, the expansion gas G1 is placed in the exhaust hole 84 during the expansion and expansion of the front lower protection portion 47. Does not reach. In the occupant-side cloth portion 43 and the non-occupant-side cloth portion 44, the portions on the outer peripheral side with respect to the exhaust hole 84 are in contact with each other, and the inflation gas G1 is difficult to be exhausted. Thus, according to the present embodiment, it is possible to suppress the inflation gas G1 from being exhausted while the bag body 41 is being expanded and expanded.

  Then, when the expansion gas G1 passes through the exhaust hole 82 as the head protection part 46 is expanded and expanded, a portion on the outer peripheral side of the exhaust hole 82 in the occupant side cloth part 43 and the counter occupant side cloth part 44 is removed. The expansion gas G1 is exhausted after being separated from each other. In addition, when the expansion gas G1 passes through the exhaust hole 84 as the front lower part protection part 47 is expanded and expanded, the outer peripheral part of the occupant side cloth part 43 and the counter occupant side cloth part 44 is located outside the exhaust hole 84. The expansion gas G1 is exhausted after being separated from each other.

  Compared with the case where the first exhaust mechanism 81 is provided at a location different from the peripheral portion of the head protecting portion 46, the exhaust start timing of the expansion gas G1 is delayed. The influence of the exhaust gas G1 exhausted through the exhaust hole 82 on the speed of expansion and expansion of the bag body 41 is reduced. Further, the exhaust start timing of the expansion gas G1 is delayed as compared with the case where the second exhaust mechanism 83 is provided at a location different from the peripheral portion of the front lower protection portion 47. The influence of the exhaust gas G1 exhaust through the exhaust hole 84 on the speed of expansion and expansion of the bag body 41 is reduced.

  Here, the expansion gas G <b> 1 generated by the gas generator 30 is supplied obliquely forward and upward in the front upper expansion portion 56. Due to the inflation gas G1, the bag body 41 is expanded and inflated from the fixed portion (rear end portion) obliquely forward and upward. In the present embodiment, the first exhaust mechanism 81 is provided between the front upper partition portions 60 in the front-rear direction. For this reason, when the expansion gas G1 flows in the front upper expansion portion 56 toward the first exhaust mechanism 81, it is unlikely that the gas flow is obstructed by both front upper partition portions 60. The inflation gas G1 in the head protecting part 46 can be smoothly exhausted from the first exhaust mechanism 81.

  In addition, a part of the inflation gas G1 in the bag body 41 and in the region rearward of the foremost front upper partition 60 passes through the rear lower communication passage 66 below the front upper partition 60. Flows to the front area. A part of the expansion gas G1 that has flowed to the front region is exhausted through the second exhaust mechanism 83. Here, if the entire second exhaust mechanism 83 is located above the upper end of the rear lower communication passage 66 (the lower end 64a of the coupling portion 64), it passes through the rear lower communication passage 66 as described above. The expansion gas G1 is exhausted from the second exhaust mechanism 83 with the flow direction being greatly changed. In this regard, in the present embodiment, the entire second exhaust mechanism 83 is located below the upper end of the rear lower communication passage 66 (the lower end 64a of the coupling portion 64). Therefore, the expansion gas G1 that has passed through the rear lower communication passage 66 can be directly exhausted from the second exhaust mechanism 83 without greatly changing the flow direction.

  In the said far side airbag apparatus, since the bag main body 41 has the head protection part 46 in the upper part as mentioned above, the bag main body 41 becomes long compared with the case where it does not have. Since the head protection part 46 is far away from the gas generator 30, when the bag body 41 starts to expand and expand, the bag body 41 is fixed to the fixing part (rear end part) by the inflation gas G1 from the gas generator 30. ) Swing forward. Subsequently, the bag body 41 swings backward with the fixed portion (rear end portion) as a fulcrum by the reaction of the forward swing. When the bag body 41 swings in the front-rear direction as described above, it is difficult to position the bag body 41 in a stable posture on the side of the occupant P1.

  In this regard, according to the present embodiment, the outer tether 77 is pulled by the bag body 41 that is expanded and inflated, and the outer tether 77 is in a tension state between the bag body 41 and the bolt 33 of the gas generator 30. The bag body 41 is restricted from swinging forward with the fixed portion (rear end portion) as a fulcrum.

  In addition, in this embodiment, a part of the expansion gas G1 in the head protection part 46 is not only exhausted through the exhaust hole 82 of the first exhaust mechanism 81, but as described above, the front lower part protection part A part of the expansion gas G <b> 1 in the 47 is exhausted through the exhaust hole 84 of the second exhaust mechanism 83. Moreover, the flow direction of the expansion gas G1 in the exhaust hole 82 and the flow direction of the expansion gas G1 in the exhaust hole 84 are different. Therefore, it is possible to suppress the back-and-forth swing of the bag body 41 as compared with the case where the inflation gas G1 is exhausted only from the exhaust hole 82.

According to the present embodiment, the following effects can be obtained in addition to the above.
Since the first exhaust mechanism 81 is provided at the peripheral portion of the head protecting portion 46, the first exhaust mechanism 81 is located on the side of the head protecting portion 46, that is, the head PH or It is difficult for the components of the vehicle 10 to be blocked. Similarly, since the second exhaust mechanism 83 is provided at the peripheral portion of the front lower protection portion 47, the second exhaust mechanism 83 is located on the side of the front lower protection portion 47, that is, the chest PT. In addition, it is difficult for the components of the vehicle 10 to be blocked.

  -In this embodiment, the small exhaust holes 82 and 84 are provided in two places in the peripheral part of the bag main body 41. As shown in FIG. Therefore, the expansion gas G1 can be gradually exhausted from the exhaust holes 82 and 84, compared to the case where a large exhaust hole is provided only at one location.

In addition, the said embodiment can also be implemented as a modification which changed this as follows.
<About the bag body 41>
The bag body 41 is fixed to a high-strength member in the same manner as the side frame portion 21 on the premise that the bag body 41 is a side portion close to the adjacent vehicle seats 14, 13 of the vehicle seats 13, 14. Also good. Further, the bag body 41 may be fixed to a member located in the vicinity of the side portion of the vehicle seats 13, 14, for example, the center console box 15.

  The bag body 41 may be substantially inflated as in the above-described embodiment, but has a non-inflatable portion that does not inflate without being supplied with the inflation gas G1. May be.

<About the rear lower partition 50 and the front upper partition 60>
-One of the front lower communication path 57 and the rear upper communication path 58 in the rear lower division part 50 may be abbreviate | omitted. Further, in the rear lower section 50, the communication path that connects the rear lower expansion section 55 and the front upper expansion section 56 is replaced with the front lower communication path 57 and the rear upper communication path 58, or in addition, the rear lower section You may provide in the intermediate part in the front-back direction of the part 50. FIG.

  -The number of the front upper division parts 60 may be changed into 1 or more than three. In any of the modifications, from the viewpoint of smoothly exhausting the expansion gas G1 from the exhaust hole 82 of the first exhaust mechanism 81, the front upper partition section 60 includes the first exhaust mechanism 81 and the head PH. It is desirable to arrange at a place deviating from the line connecting the center PHC (see FIG. 4). This is because when the front upper section 60 is arranged on the above line, the flow of the expansion gas G1 toward the first exhaust mechanism 81 is blocked by the front upper section 60.

  In the case where a plurality of front upper partition parts 60 are provided and both the first exhaust mechanism 81 and the second exhaust mechanism 83 are provided as exhaust mechanisms, the front upper partition part 60 located at the forefront is the head protection part 46. It is preferable that the expansion thickness of both of the front and lower protection portions 47 is regulated. On the other hand, the front upper partition 60 that is different from the frontmost one may restrict the expansion thicknesses of both the head protection part 46 and the front lower protection part 47, or the head protection. The expansion thickness of only the portion 46 may be restricted.

  When a plurality of front upper partition portions 60 are provided and only the first exhaust mechanism 81 is provided as an exhaust mechanism, all the front upper partition portions 60 are the head of the head protection portion 46 and the front lower protection portion 47. The expansion thickness of only the part protection part 46 may be regulated.

  -One of the front upper communication path 65 and the rear lower communication path 66 in each front upper division part 60 may be abbreviate | omitted. Further, in each front upper partition section 60, the communication path for communicating adjacent areas of the front upper expansion section 56 is replaced with, or in addition to, the front upper communication path 65 and the rear lower communication path 66. 60 may be provided at an intermediate portion in the vertical direction.

-All the front upper division parts 60 may be abbreviate | omitted. In this case, the front upper expansion part 56 is constituted by one region that is not partitioned.
-Each front upper division part 60 is comprised by using a means, such as a stitching | suture, in the state which mutually contacted the passenger | crew side cloth part 43 and the anti-occupant side cloth part 44, without using the cloth part 61. Also good.

<Inner tube 70>
-The opening 75 presupposes that it is located below the opening 76, and may be provided in the location different from the said embodiment. For example, the opening 75 may be provided above the lower end portion of the inner tube 70. In this case, the opening 75 may be provided in one place or may be provided in a plurality of places. Similarly, on the assumption that the opening 76 is located above the opening 75, the opening 76 may be provided at a location different from the above embodiment. In this case, the opening 76 may be provided at one place or may be provided at a plurality of places.

Further, a part of the joint part 74 where the joint of the two cloth parts 72 and 73 by the joint part 74 is released may be provided, and this part may be the upper opening 76.
<Exhaust mechanism>
The second exhaust mechanism 83 can also be applied to the case where the front lower part protection part 47 is deployed and expanded on the side of the abdomen PB instead of or in addition to the chest part PT of the occupant P1. Also in this case, the second exhaust mechanism 83 is provided at the front end portion of the front lower protection portion 47 and exhausts a part of the expansion gas G1 forward.

  The second exhaust mechanism 83 may be formed so that a part thereof is located below the upper end of the rear lower communication passage 66 (the lower end 64a of the coupling portion 64). Also in this case, an effect of exhausting the expansion gas G1 that has passed through the rear lower communication passage 66 directly from the second exhaust mechanism 83 without greatly changing the flow direction can be obtained.

  The second exhaust mechanism 83 may be omitted. Further, in addition to the first exhaust mechanism 81 and the second exhaust mechanism 83, the rear end portion of the bag main body 41 and for exhausting the inflating gas G1 rearward to a location above the rear lower section 50. A third exhaust mechanism (not shown) may be provided. By increasing the number of exhaust mechanisms, the inflation gas G1 is exhausted in a plurality of directions, and it becomes easier to suppress the swinging of the bag body 41 with the fixed portion (rear end portion) as a fulcrum.

  -A hole may be formed across the peripheral edge portion of the occupant side cloth portion 43 and the peripheral edge portion of the anti-occupant side cloth portion 44, and the exhaust holes 82 and 84 may be configured by these holes. In this case, the connection by the peripheral connection part 45 is released at the place where the hole is formed.

<Others>
The control device 87 may be changed to a specification that outputs an operation signal to the inflator 31 when it is predicted that an impact from the side is applied to the vehicle 10.

  -The airbag apparatus is applicable also to the side airbag apparatus shown in FIG.1, FIG9 and FIG.10. In FIGS. 9 and 10, members that are the same as those in the above embodiment are given the same reference numerals. In this type of side airbag device, when an impact is applied to the side wall 11 from the side or when an impact is predicted to be applied, the inflation gas G1 is supplied from the gas generator 30 to the bag body 41. . The bag body 41 is deployed and inflated between the upper body of the occupant P1 and the side wall portion 11 entering the vehicle interior. The upper body of the occupant P1 is restrained by the bag body 41, and the impact from the side transmitted to the upper body through the side wall portion 11 is alleviated, so that the upper body is protected from the impact.

  In the side airbag device, the bag main body 41 has the head protecting portion 46 at the top. A first exhaust mechanism 81 that exhausts the inflation gas G <b> 1 outward is provided at the periphery of the head protecting portion 46. In FIG. 9, the exhaust hole 82 of the first exhaust mechanism 81 is provided at the front end portion of the head protecting portion 46 and exhausts the expansion gas G1 forward. Therefore, also in this modification, the same operation and effect as the far side airbag device described in the above embodiment can be obtained.

  The far-side airbag device and the side airbag device can be applied to a vehicle in which three or more vehicle seats are arranged in the vehicle width direction. In this case, the airbag body is deployed and inflated on the side of the vehicle seat in response to an impact applied to the side wall from the side of the vehicle.

The vehicles to which the far side airbag device and the side airbag device are applied include not only private vehicles but also various industrial vehicles.
The far-side airbag device and the side airbag device are equipped with a vehicle other than a vehicle, for example, an aircraft, a ship, and the like, and protect a passenger seated on a vehicle seat from an impact caused by a side collision or the like. The present invention is also applicable to bag devices and side airbag devices.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle (vehicle), 11, 12 ... Side wall part, 13, 14 ... Vehicle seat (vehicle seat), 30 ... Gas generator, 40 ... Air bag, 41 ... Bag main body, 43 ... Passenger side cloth part ( Cloth part), 44 ... counter-occupant side cloth part (cloth part), 45 ... peripheral edge joint part, 46 ... head protection part, 47 ... front lower part protection part, 60 ... front upper partition part (expansion thickness regulation part), 64a ... lower end of coupling part (upper end of rear lower communication path), 66 ... rear lower communication path (communication path), 81 ... first exhaust mechanism (exhaust mechanism), 82, 84 ... exhaust hole, 83 ... second exhaust mechanism ( Exhaust mechanism), G1 ... expansion gas, P1, P2 ... occupant, PB ... abdomen, PH ... head, PT ... chest.

Claims (6)

An airbag having a bag body that is deployed and inflated by an inflation gas supplied from a gas generator;
The bag body is fixed together with the gas generator in a fixed portion set at the rear end of the vehicle on which the vehicle seat is arranged,
The bag body has an expansion gas supplied from the gas generator when an impact is applied to the side wall of the vehicle from the side or when an impact is predicted to be applied from the side. On the side of the vehicle seat, it is an airbag device that protects an occupant seated in a regular posture on the vehicle seat from an impact by deploying and inflating obliquely forward upward from the fixed portion,
The bag body has a head protecting part that expands and expands on the side of the occupant's head,
An airbag device provided with an exhaust mechanism for exhausting the inflation gas outwardly at a peripheral edge of the head protecting portion.   The airbag device according to claim 1, wherein the exhaust mechanism is provided at an upper end portion of the head protection portion and exhausts the inflation gas upward. The bag body has a front lower protection part that expands and expands on at least one side of the chest and abdomen of the occupant,
When the exhaust mechanism in the head protection unit is a first exhaust mechanism,
As a part of an exhaust mechanism for exhausting the inflation gas in the bag body, a second exhaust that exhausts the inflation gas forward from the front lower protection portion is provided at a peripheral portion of the front lower protection portion. The airbag apparatus according to claim 1 or 2, wherein a mechanism is provided. In the bag main body, at least the head protecting portion, and at a plurality of locations separated from each other in the front-rear direction, an expansion thickness regulating portion that regulates the expansion thickness in the width direction of the vehicle is provided, respectively.
The airbag apparatus according to claim 3, wherein the first exhaust mechanism is provided between adjacent inflated thickness regulating portions in the front-rear direction. Among the plurality of expansion thickness regulating portions, at least the most inflated expansion thickness regulating portion regulates the expansion thickness of the front lower protection portion in addition to the head protection portion,
The front lower protection part is provided with a communication path that communicates the area adjacent to the front and rear with the expansion thickness restriction part positioned at the foremost side under the expansion thickness restriction part,
The airbag device according to claim 4, wherein at least a part of the second exhaust mechanism is located below an upper end of the communication path. The bag body includes a pair of cloth portions that are arranged in the width direction of the vehicle, and peripheral portions are joined by a peripheral joint portion,
The exhaust mechanism in at least one of the head protecting portion and the front lower protecting portion has an exhaust hole formed by a portion between the peripheral portions of both cloth portions and the connection by the peripheral joint portion being released. The airbag according to any one of claims 3 to 5, wherein the exhaust hole allows the inside and the outside of the bag body to communicate with each other and exhausts the inflation gas in the bag body to the outside. apparatus.