JP2010095064A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device capable of laterally equally inflating an airbag body in operation. <P>SOLUTION: This airbag device S is arranged in a seat part so as to regulate the forward movement of an occupant seated on the seat in operation, and has an airbag 20 and an inflator 41. The airbag has the airbag body 21 having an upper wall 22 and a lower wall 26, and an inner bag 30 arranged in the airbag body so as to wrap the inflator 41 and having an outflow port 32a for making inflating gas from the inflator 41 flow out to the airbag body 21 side. The inner bag 30 is arranged by respectively opening the outflow port 32a upward on both right-left sides on the rear side. A gas jetting port 47 for supplying the inflating gas into the inner bag in the inflator, is arranged so that the inflating gas flowed out of the right-left outflow ports can equally flow out of the right-left outflow ports. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an airbag device disposed on a seat portion of a seat so that a forward movement (a so-called submarine phenomenon) of an occupant seated on the seat can be restricted during operation.

  Conventionally, this type of airbag apparatus includes an airbag and an inflator that is disposed in the airbag and supplies inflation gas to the airbag (see, for example, Patent Document 1). This inflator has a substantially cylindrical shape that is disposed in the airbag with the axial direction extending in the left-right direction, and is attached as an attachment means for discharging the inflation gas and fixing the airbag to the seat pan during operation. Had bolts. Further, the airbag is configured to include an airbag body and an inner bag disposed in the airbag body so as to wrap the inflator. The airbag main body is arranged with the upper wall portion and the lower wall portion being overlapped and deployed on a seat pan inside the seat portion, and at least when the inflating gas flows in, at least the front side of the seat portion is directed upward. In order to make it rise, the upper wall portion was inflated so as to be separated upward from the lower wall portion. The inner bag has an outflow port through which the inflation gas discharged from the inflator flows out to the airbag body side. This inner bag is arranged at one end to receive and inflate the inflation gas from the inflator to secure the inflation portion at the initial stage of inflation of the airbag and to protect the airbag body from the hot inflation gas. It was set up.

And in this airbag apparatus, it is actuated at the time of a frontal collision of the vehicle, the inflator supplies the inflating gas into the inner bag from the gas outlet, the inner bag inflates, and the inflating gas from the outlet The airbag body is inflated so that the upper wall portion is separated upward from the lower wall portion. Then, by the expansion of the inner bag and the expansion of the airbag body, at least the seat cushion above the seat pan on the front side of the seat is raised upward, and the raised portion of the thigh of the passenger is The front back side was stopped to restrict the occupant's forward movement.
JP 2007-118816 A

  However, in the conventional airbag device, the arrangement of the outlet of the inner bag that allows the inflation gas to flow into the airbag body and the gas outlet of the inflator is not a configuration that inflates the airbag body evenly on both the left and right sides. There was room for.

  This invention solves the above-mentioned subject, and it aims at providing the airbag apparatus which can inflate an airbag main body equally right and left at the time of an action | operation.

The airbag device according to the present invention is disposed in the seat portion of the seat so that the forward movement of the occupant seated on the seat can be restricted during operation.
The upper wall portion and the lower wall portion are overlapped and deployed on the seat pan inside the seat portion, and when the inflating gas flows, at least the front portion side of the seat portion is raised upward, An airbag that inflates so as to separate the upper wall portion from the lower wall portion; and
An inflator having attachment means for fixing the airbag to the seat pan while injecting the inflation gas during operation, as a substantially cylindrical shape arranged in the airbag with the axial direction along the left-right direction;
With
The airbag is disposed in the airbag body so as to wrap the inflator with the airbag body having an upper wall portion and a lower wall portion, and the inflation gas supplied from the inflator is supplied to the airbag body side. An airbag device configured to include an inner bag having an outlet to be flowed out,
The inflator is fixed near the front edge of the seat pan,
The inner bag is a bag shape that wraps around the inflator and extends rearward, and the outlets are arranged on the left and right sides on the rear side, respectively, with the opening upward,
The gas jet port for supplying the inflation gas to the inner bag in the inflator is arranged so that the inflation gas flowing out from the left and right outlets can be evenly discharged from the left and right outlets.

  In the airbag apparatus according to the present invention, when activated, the inflator ejects the inflating gas from the gas ejection port, the inflating gas is supplied to the inner bag that wraps the inflator and extends rearward, and the inner bag However, the part extended backward from the inflator is expanded. Further, the inflation gas is discharged upward from the left and right outlets of the inner bag into the airbag body, and the airbag body is inflated so as to separate the upper wall portion from the lower wall portion, thereby completing the inflation. It becomes.

  At this time, the gas outlet for supplying the inflation gas to the inner bag in the inflator is arranged in the inflator so that the inflation gas that flows out from the left and right outlets can be evenly discharged from the left and right outlets, The airbag body inflated by the inflating gas supplied from the outflow port is inflated evenly on the left and right sides, and the inflation is completed.

  Therefore, in the airbag device according to the present invention, the airbag main body can be inflated evenly in the left and right directions during operation, and the front and back sides of the left and right thighs of the occupant seated on the seat are evenly distributed in the left and right directions. It can be stopped, the right and left balance can be improved, and the forward movement of the occupant can be restricted.

  In the airbag device according to the present invention, if the left and right outlets are opened with the same opening shape, and the gas outlet is arranged on the center line between the left and right outlets, The distances from the jet outlet to the left and right outlets can be made equal to each other, and the inflation gas can easily flow out from the left and right outlets having the same opening shape to the airbag body. Further, the inner bag itself can be inflated with good balance on the left and right, and even if the occupant moves forward immediately after the operation, the right and left balance can be improved and the front side of the seat can be raised.

  Moreover, in the airbag apparatus according to the present invention, it is desirable that the left and right outflow ports are respectively formed so that the opening area is larger than the opening area of the gas ejection port. In such a configuration, the flow rate of the inflation gas flowing out from the outlet can be suppressed from the flow rate of the inflation gas ejected from the gas outlet, and the damage to the airbag body can be prevented by the reinforcing cover cloth of the inner bag itself. Combined with the role of, it can be further reduced.

  Furthermore, in the airbag device according to the present invention, it is desirable that the airbag body is configured such that the rear end portion is disposed on the rear side beyond the center in the front-rear direction of the seat portion when inflated. In such a configuration, when the airbag body is completely inflated, the rear end side of the seat portion is easily raised upward due to the expansion of the rear end portion. Therefore, if the occupant seated in the seat is wearing a seat belt, the waist and thigh area of the occupant is pressed by the lap belt of the seat belt, and in addition, the rear end side of the seat As a result of the upward bulge, the lap belt portion is pressed down, and the forward movement of the occupant in the vicinity of the waist and thighs can be further restricted, which is suitable for suppressing the submarine phenomenon.

  Furthermore, in the airbag apparatus according to the present invention, the inflator has a main body that generates an inflating gas during operation and a gas outlet, and the main body is capable of ejecting the inflating gas generated in the main body from the gas outlet. And a retainer having attachment means, and the attachment means is constituted by an attachment bolt that is inserted and fixed in the attachment hole of the seat pan toward the front, and the gas ejection port is It is desirable that both sides be opened as the same opening shape and disposed on the retainer. In such a configuration, the mounting bolt as the mounting means is arranged to extend to the front side opposite to the inner bag extending to the rear side so as to wrap the inflator and secure an expansion volume extending to the rear side of the inner bag. Meanwhile, the inflator can be fixed to the seat pan by reducing the thickness of the airbag device. In addition, the retainer opens the gas outlets on the upper and lower sides as the same opening shape, and even if the inflator is operated alone, both the gas outlets blow out the expansion gas, so the thrust is canceled out. As a result, the movement of the inflator is prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an airbag device S of the embodiment has a seat in a vehicle seat 1 having a backrest portion 2 and a seat portion 3. It is mounted on part 3. As shown in FIG. 3, the seat belt 12 and the buckle 16 of the seat belt device 11 are disposed in the vicinity of the seat 1. When the tongue 15 is fastened to the buckle 16, the seat belt 12 restrains the upper body of the occupant M so that the shoulder belt portion 13 from the anchor (not shown) to the tongue 15 does not move forward. The lap belt portion 14 up to the fixed portion of the vehicle restrains the waist W and the thigh T of the occupant M so as to restrict upward movement and forward movement.

  As shown in FIG. 2, the seat portion 3 of the seat 1 is configured by disposing a seat cushion 9 on the upper surface side of a sheet metal seat pan 4, and an outer skin 10 such as a fabric around the seat cushion 9. Is arranged. The seat pan 4 is provided with a box-shaped part recessed downward on the front side, and a general part 5 having a flat surface on the rear side from the part. A box-shaped portion recessed downward on the front side is disposed so as to extend in the left-right direction, and serves as a mounting seat portion 6 that houses and attaches the inflator 41 of the airbag device S. A plurality of mounting holes 6b through which mounting bolts 48 as mounting means for the inflator 41 are inserted are formed in the front wall 6a on the front side of the mounting seat 6. In the case of the embodiment, three mounting holes 6b are arranged in parallel along the left-right direction corresponding to the mounting bolts 48 of the inflator 41.

  As shown in FIGS. 2 and 4, the airbag device S includes an airbag 20 and an inflator 41 that is disposed in the airbag 20 and supplies inflation gas to the airbag 20. .

  The inflator 41 has a substantially cylindrical shape that is disposed in the airbag 20 with the axial direction along the left-right direction. As shown in FIGS. 4 to 6 and 8, the inflator 41 includes a substantially cylindrical main body 42 that generates an expansion gas G during operation, and a substantially cylindrical retainer 45 that holds the main body 42. It is configured. The main body 42 is provided with a plurality of gas discharge ports 43 on both sides near the center in the front-rear direction, in other words, on both sides in the vertical direction when mounted on the vehicle (when fixed to the seat pan 4). The main body 42 is operated by inputting an operation signal from a predetermined airbag operation circuit through the lead wire 50 at the time of a frontal collision of the vehicle, and the inflation gas is discharged from the gas discharge port 43.

  The retainer 45 is configured to include a substantially cylindrical sheet metal main body cylinder portion 46 into which the main body 42 can be inserted. The main body cylinder portion 46 is caulked so as to be reduced in diameter after the main body 42 is inserted. The clamp part 46a which can clamp 42 is provided. Furthermore, the main body cylinder part 46 is provided with an attachment bolt 48 as an attachment means so as to extend from the front side when the vehicle is mounted to the front side. Three mounting bolts 48 are arranged side by side along the axial direction of the retainer 45 (main body cylinder portion 46) (along the left-right direction when the vehicle is mounted). Further, the main body cylinder portion 46 is provided with a gas outlet 47 for supplying the inflation gas to the inner bag 30 of the airbag 20. In the case of the embodiment, the gas outlet 47 is circularly opened and disposed at two central locations in the left-right direction. The two gas outlets 47 are arranged on both sides in the vertical direction when mounted on the vehicle (when fixed to the seat pan 4) so as to substantially coincide with the plurality of gas discharge ports 43 of the main body 42. Note that there is a gap between the main body 42 and the main body cylinder portion 46 except for the portion of the clamp portion 46a, and the gas outlet 47 allows the expansion gas discharged from a plurality of gas outlets 43 in the vicinity. Then, it is converged and ejected in the direction perpendicular to the axis of the inflator 41.

  Further, the gas jet outlets 47 on both the upper and lower sides are set to have the same opening dimension (diameter dimension) RS (see FIG. 6), and further, the opening dimension (diameter dimension) RL (outlet port 32a of the inner bag 30 described later) (See FIG. 6).

  As shown in FIGS. 2, 4, 6, and 7, the airbag 20 includes an airbag body 21 and an inner bag 30 disposed in the airbag body 21 so as to wrap the inflator 41. ing. The airbag main body 21 and the inner bag 30 are both formed of a woven fabric such as polyamide or polyester having flexibility.

  The airbag main body 21 includes an upper wall portion 22 located on the seat cushion 9 side and a lower wall portion 26 located on the seat pan 4 side when inflation is completed. The airbag main body 21 is formed by overlapping the upper wall portion 22 and the lower wall portion 26 in the vertical direction and sewing the outer peripheral edges together with a suture thread 39 except for the front edge side. Both the upper wall portion 22 and the lower wall portion 26 are disposed so as to cover the substantially rectangular main body panel portions 23 and 27 placed on the upper surface 5 a of the general portion 5 of the seat pan 4 and the inflator 41. And substantially rectangular mounting pieces 24 and 28 housed in the mounting seat portion 6. The attachment piece portion 24 of the upper wall portion 22 is disposed so as to cover the outer periphery of the attachment piece portion 28 of the lower wall portion 26 and extend downward, and has a length dimension in the front-rear direction from the attachment piece portion 28. It is getting bigger. Insertion holes 24 a and 28 a through which the attachment bolts 48 of the inflator 41 are inserted are formed in the attachment pieces 24 and 28.

  In the case of the embodiment, the airbag body 21 is formed from a single woven fabric that is folded in half on the rear edge side to form the upper wall portion 22 and the lower wall portion 26.

  The airbag main body 21 is set to be as large as possible within a range in which the width dimension in the left-right direction can be disposed in the seat portion 3. Further, the rear end portion 21c of the airbag body 21 has a length dimension in the front-rear direction so as to be disposed on the rear side beyond the center portion 3b in the front-rear direction of the seat portion 3 when the airbag 20 is completely inflated. It is set long (see FIG. 8).

  The inner bag 30 includes an upper part 31 located on the seat cushion 9 side and a lower part 35 located on the seat pan 4 side when the inflation is completed. The inner bag 30 is formed by overlapping the upper side portion 31 and the lower side portion 35 in the vertical direction and stitching the left and right edges of the outer peripheral edge with the suture thread 39. Both the upper part 31 and the lower part 35 are disposed so as to cover the inflator 41 and the substantially rectangular placing parts 32 and 36 placed on the upper surface 5 a of the general part 5 of the seat pan 4. A substantially rectangular mounting piece portion 33, 37 accommodated in the mounting seat portion 6 is provided. The attachment piece portion 33 of the upper portion 31 is disposed so as to cover the outer periphery of the attachment piece portion 37 of the lower portion 35 and extend downward, and the length dimension in the front-rear direction is larger than the attachment piece portion 37. is doing. Insertion holes 33a and 37a through which the attachment bolts 48 of the inflator 41 are inserted are formed in the attachment pieces 33 and 37, respectively. The inner bag 30 is set to be as large as possible in the airbag main body 21 as long as the width dimension in the left-right direction can be disposed in the seat portion 3.

  In the case of the embodiment, the inner bag 30 is formed of a single woven fabric that is folded in half on the rear edge side to form the upper part 31 and the lower part 35.

  An outflow port 32 a is opened at a portion of the placement portion 32 of the upper portion 31 of the inner bag 30 so that the inflation gas from the inflator 41 is supplied to the airbag body 21. The outflow ports 32a are arranged in the vicinity of the left and right ends of the mounting portion 32 so as to open in a circular shape and be symmetrical to each other. Furthermore, the left and right outflow ports 32a are disposed evenly spaced on the left and right sides from the two gas ejection ports 47 disposed in the center of the inflator 41 in the left-right direction. In other words, the gas outlet 47 is disposed at a position on the center line CL (see FIG. 4) between the left and right outlets 32a, 32a.

  As shown in FIGS. 6 and 7, the airbag 20 of the embodiment is manufactured by manufacturing the inner bag 30, placing the inner bag 30 on the upper surface of the lower wall portion 26, and raising the upper wall portion 22 of the airbag main body 21. If the outer peripheral edges of the upper wall portion 22 and the lower wall portion 25 are sewn together with the inner bag 30 except for the vicinity of the center on the front edge side using the suture thread 39, the inner bag 30 can be manufactured. it can. The front edge side of the airbag main body 21 and the inner bag 30 at the unstitched portions are assembly holes 21 a and 30 a for inserting the inflator 41. In addition, the attachment piece parts 33 and 37 of the inner bag 30 will be located in the inner peripheral surface side of the assembly hole 21a.

  After the airbag 20 is manufactured, the mounting bolts 48 are first attached to the lower wall portion 26 and the lower side portion 35 while the inflator 41 is inserted into the inner bag 30 through the assembly hole 30a. It protrudes from the airbag 20 through the insertion holes 28a and 37a. Subsequently, the airbag device S can be assembled by pulling the attachment pieces 24 and 33 of the upper wall portion 22 and the upper portion 31 and inserting the attachment bolts 48 into the insertion holes 24a and 33a. The lead wire 50 is led out of the airbag 20 from the assembly hole 30a through the vicinity of the left edge of the attachment pieces 24 and 33.

  Thereafter, each mounting bolt 48 is inserted into the mounting hole 6b of the mounting seat portion 6 of the seat pan 4 from the rear side to the front side, the nut 7 is fastened to each mounting bolt 48, and the vicinity of the rear edge of the airbag body 21 The airbag device S can be attached and fixed to the seat pan 4 if the locking hole 21b provided in the seat pan is detachably locked to a clip (not shown) of the seat pan 4. The airbag 20 (the main body panel portions 23 and 27 and the placement portions 32 and 36) is disposed between the seat pan 4 and the seat cushion 9, and the seat 1 such as the seat cushion 9 is disposed above the seat pan 4. If the seat 1 is mounted on the vehicle while the components are assembled, the seat 1 is manufactured, and the lead wire 50 is connected to the airbag operating circuit, the airbag device S can be mounted on the vehicle.

  After the airbag device S is mounted on the vehicle, when an operation signal is input from the airbag operation circuit to the main body 42 of the inflator 41, the main body 42 of the inflator 41 discharges the inflation gas from the gas discharge port 43. As shown in FIG. 8, the expansion gas G discharged from the gas discharge port 43 is converged to the gas discharge port 47 of the retainer 45 and is discharged from the upper and lower gas discharge ports 47, 47 in the direction orthogonal to the axis of the inflator 41. Then, it is supplied to the inner bag 30 that wraps the inflator 41 and extends rearward. And the inner bag 30 inflates the site | parts of the mounting parts 32 and 36 located in the upper surface 5a of the general part 5 of the seat pan 4 extended back from the inflator 41. Further, the inflation gas G flows out into the airbag body 21 from the left and right outlets 32a of the inner bag 30, and the airbag body 21 passes the body panel portion 23 of the upper wall portion 22 through the lower wall portion 26. Swells away from the main body panel portion 27 to complete the expansion. The airbag 20 bulges up the seat cushion 9 above the seat pan 4 on the front side of the seat portion 3 by the inflation of the inner bag 30 and the inflation of the airbag body 21, and the bulge portion thereof. The front back side of the thigh T of the occupant M can be stopped by 3a, and the forward movement of the occupant M can be restricted.

  At this time, the gas ejection port 47 for supplying the inflation gas G to the inner bag 30 in the inflator 41 causes the inflation gas G to flow out from the left and right outlets 32a opened in the same opening shape from the left and right outlets 32a. The inflator 41 is disposed at the center in the left-right direction and on the center line CL between the left and right outlets 32a and 32a so that the inflator 41 can flow out evenly. Therefore, the airbag body 21 inflated by the inflating gas G supplied from the outlets 32a and 32a is inflated evenly to the left and right, and the inflation is completed by separating the seat cushion 9 from the seat pan 4 upward. Become.

  Therefore, in the airbag apparatus S of the embodiment, the airbag body 21 can be inflated evenly on the left and right sides during operation, and the front and back sides of the left and right thighs T of the occupant M seated on the seat 1 The left and right can be stopped evenly, the right and left balance can be improved, and the forward movement of the occupant M can be restricted.

  In particular, in the airbag apparatus S of the embodiment, the gas ejection port 47 is arranged on the center line CL between the left and right outflow ports 32a having the same opening shape. Therefore, the distance from the gas outlet 47 to the left and right outlets 32a can be made equal to each other, and the inflation gas G can be easily and evenly distributed from the left and right outlets 32a, 32a. Easy to drain into. Further, the inner bag 30 itself can be inflated in a balanced manner on the left and right. Even if the occupant M moves forward immediately after the operation, the right and left balance is improved, and the raised portion 3a on the front side of the seat portion 3 is Can be raised.

  In the airbag apparatus S of the embodiment, the left and right outlets 32 a have a diameter dimension RL larger than the opening dimension RS of the gas outlet 47, and the opening area is the opening area of the gas outlets 47 and 47, respectively. It is formed larger. Therefore, in the airbag apparatus S, the flow rate of the inflation gas G flowing out from the outlets 32a and 32a can be suppressed from the flow rate of the inflation gas G ejected from the gas ejection port 47. The damage can be further reduced in combination with the role of the inner bag 30 itself as a reinforcing cover cloth.

  Furthermore, in the airbag device S of the embodiment, the airbag body 21 is configured such that the rear end portion 21c is disposed on the rear side beyond the central portion 3b in the front-rear direction of the seat portion 3 when inflated. Yes. Therefore, in the embodiment, in the airbag device S, when the airbag main body 21 is completely inflated, the rear end side of the seat portion 3 is easily raised upward due to the expansion of the rear end portion 21c. Therefore, if the occupant M seated on the seat 1 is wearing the seat belt 12, the lap belt portion 14 of the seat belt 12 is pressed by the lap belt portion 14 of the seat belt 12, and the lap belt portion 14 of the occupant M is further pressed. Thus, the upward bulge on the rear end side of the seat portion 3 is pressed against the lap belt portion 14 and can further restrict the forward movement of the occupant M near the waist W and thigh T. This is suitable for suppressing the phenomenon.

  Furthermore, in the airbag apparatus S of the embodiment, the inflator 41 has a main body 42 that generates an inflating gas G during operation and a gas outlet 47, and the inflating gas G generated in the main body 42 is ejected from the gas. The main body 42 is held so as to be ejected from the outlet 47, and a retainer 45 having attachment means is provided. The attachment means is inserted and fixed in the attachment hole 6b of the seat pan 4 facing forward. The gas jet port 47 is configured by a mounting bolt 48, and is opened on the upper and lower sides in the same opening shape and disposed in the retainer. Therefore, the mounting bolt 48 as the mounting means is disposed so as to extend to the front side opposite to the inner bag 30 that extends to the rear side so as to surround the inflator 41, and an inflated volume (mounting piece) that extends to the rear side of the inner bag 30. The inflator 41 can be fixed to the seat pan 4 by reducing the thickness of the airbag device S while securing the volume from the portions 33 and 37 to the placement portions 32 and 36. Furthermore, the retainer 45 opens the gas outlets 47, 47 in the upper and lower sides as a circular opening shape having the same opening area. Even if the inflator 41 is operated alone, the gas outlets 47, 47, since the inflation gas G is ejected to both sides in the diameter direction of the inflator 41, the thrust is offset, and the movement of the inflator 41 is prevented.

It is a general | schematic fragmentary longitudinal cross-section of the sheet | seat in which the airbag apparatus of one Embodiment of this invention was mounted. It is an expansion schematic longitudinal cross-sectional view of the seat part in which the airbag apparatus of embodiment was mounted. It is a schematic perspective view of the sheet | seat in which the airbag apparatus of embodiment is mounted. It is a bottom view of the airbag apparatus of an embodiment. It is a schematic perspective view of the inflator used for the airbag apparatus of embodiment. It is a figure which shows the figure of the state which the structural member of the airbag used for the airbag apparatus of embodiment expand | deployed with an inflator. It is a figure explaining the assembly | attachment process of the airbag apparatus of embodiment. It is an expansion schematic longitudinal cross-sectional view which shows the time of the action | operation of the airbag apparatus of embodiment.

Explanation of symbols

1 ... sheet,
3 ... the seat,
4 ... Sheet bread,
20 ... Airbag,
21 ... Airbag body,
30 ... Inner bag,
32a ... Outlet,
41 ... Inflator,
47 ... Gas outlet,
48 ... (Mounting means) Mounting bolt,
S ... Airbag device,
M ... Crew.

Claims (5)

At the time of operation, the forward movement of the occupant seated on the seat can be restricted, and the seat is disposed on the seat,
The upper wall portion and the lower wall portion are overlapped and deployed on the seat pan inside the seat portion, and when the inflating gas flows, at least the front portion side of the seat portion is raised upward, An airbag that inflates so as to separate the upper wall portion from the lower wall portion; and
An inflator having an attachment means for ejecting inflation gas and fixing the airbag to the seat pan during operation, as a substantially cylindrical shape disposed in the airbag with the axial direction aligned in the left-right direction When,
With
The airbag is disposed in the airbag body so as to wrap the inflator with the airbag body having the upper wall portion and the lower wall portion, and the inflation gas supplied from the inflator An airbag device having an outlet for flowing out to the airbag body side,
The inflator is fixed near the front end of the seat pan;
The inner bag is formed as a bag shape that wraps around the inflator and extends rearward, and the outlets are disposed on both the left and right sides on the rear side, respectively, with an upward opening.
The gas outlet for supplying the inflation gas to the inner bag in the inflator is arranged so that the inflation gas for flowing out from the left and right outlets can be evenly discharged from the left and right outlets. A featured airbag device. The left and right outlets are opened as the same opening shape,
The airbag apparatus according to claim 1, wherein the gas ejection port is disposed on a center line between the left and right outflow ports.   The airbag device according to claim 1 or 2, wherein the left and right outlets are formed so that an opening area thereof is larger than an opening area of the gas ejection port.   The air bag body is configured so that a rear end portion is disposed on the rear side beyond the center in the front-rear direction of the seat portion when inflated. The airbag apparatus of any one of Claims. The inflator has a main body that generates an expansion gas during operation and the gas outlet, and holds the main body so that the expansion gas generated in the main body can be ejected from the gas outlet, and the attachment And a retainer having means,
The mounting means is composed of a mounting bolt that is inserted and fixed to the mounting hole of the seat pan toward the front,
The airbag device according to any one of claims 1 to 4, wherein the gas ejection port is opened in the same shape on both the upper and lower sides and is disposed in the retainer.

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