JP5989494B2 - Air bag and air bag device - Google Patents

Description

  The present invention relates to an airbag and an airbag device, and more particularly to an airbag and an airbag device suitable for downsizing.

  It has become common for vehicles such as automobiles to be equipped with an airbag device for inflating and deploying an airbag in the vehicle in the event of an emergency such as a collision or sudden deceleration to absorb the impact generated on the passenger. Yes. These airbag devices generally include an airbag that is normally folded and inflated and deployed in an emergency, an inflator that supplies gas to the airbag, a retainer that fixes the airbag and the inflator, And an airbag cover that covers the airbag.

  When the vehicle collides or suddenly decelerates, gas is supplied from the inflator to the airbag, the airbag is inflated, the airbag cover is opened, the airbag is released into the vehicle, and is inflated and deployed. In particular, in the case of a passenger seat airbag device, the airbag is inflated and deployed in a space surrounded by an instrument panel, a windshield (front glass), and an occupant. There has also been proposed an airbag in which a partition member (partition cloth) is arranged as a rectifying unit or a pressure adjusting unit inside the airbag (see, for example, Patent Document 1 and Patent Document 2).

  For example, the airbag described in Patent Document 1 includes a partition cloth that changes the flow path of the inflator gas inside, and the both sides of the partition cloth are substantially parallel to the front-rear direction of the airbag case. While sewing on the upper surface part and side surface part of a bag, the base end part of this partition cloth is superposed on the mouth part of the lower surface part of the airbag and fixed to the airbag case. By disposing such a partition cloth, gas can be preferentially allowed to flow into the upper side of the airbag.

  Moreover, the airbag described in Patent Document 2 has a partition member arranged to partition the interior into an upper chamber and a lower chamber, and supplies the gas of the gas generating means to the upper chamber side first. Thus, the internal pressure difference is set so that the internal pressure of the upper chamber is higher than the internal pressure of the lower chamber.

Japanese Patent Application Laid-Open No. 07-267032 JP 2009-190573 A

  In the airbag apparatus described in Patent Document 1 and Patent Document 2 described above, the airbag outlet is arranged at a position facing or close to the occupant so that the airbag is easily discharged toward the occupant. ing. However, in recent years, vehicle interiors such as instrument panels have been diversified, and in some cases, it has been necessary to dispose the airbag toward the upper side of the vehicle.

  Further, in the airbag for a passenger seat, generally, positioning at the time of inflation and deployment is performed by contacting with a windshield (front glass). However, the vehicle body configuration in recent years has been diversified, and vehicles with a windshield (front glass) rising up to an angle of 45 degrees or more (in some cases close to 90 degrees) have been produced. In such a vehicle, if the airbag is brought into contact with the windshield (windshield), the distance from the instrument panel to the windshield (windshield) is long, so the airbag must be enlarged. As the amount of cloth used increases or the inflator becomes larger, problems such as an increase in cost and an increase in weight occur.

  The present invention was devised in view of such a problem, and an airbag can be inflated and deployed without relying on a windshield or a windshield, thereby reducing the size, cost and weight of the airbag. An object of the present invention is to provide an airbag and an airbag device that can be used.

According to the present invention, in an airbag that is normally folded and accommodated in a vehicle structure and is inflated and deployed by supplying gas in an emergency, the interior of the airbag is formed on the front side of the vehicle. A partition wall partitioned into a chamber and a rear chamber formed on the rear side of the vehicle, and disposed at least near the surface of the vehicle structure of the partition wall when the airbag is inflated and deployed, and the gas from the front chamber The partition wall has an upper end connected to the upper surface of the airbag, a lower end connected to the lower surface of the airbag, and a side portion inflated and deployed. There is provided an airbag characterized in that it has a widened portion that can be in close contact with the inner surface of the airbag. According to the invention, in the airbag, the partition wall that partitions the interior of the airbag into a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle, and the airbag A communication hole disposed at least near the surface of the vehicle structure of the partition wall during expansion and deployment of the gas and supplying the gas from the front chamber to the rear chamber. Connected to the upper surface of the airbag, the lower end is connected to the lower surface of the airbag, and the upper end is connected to form a convex curved surface on the rear chamber side, Or the said lower end part is connected to the height position equivalent to the top part of the protrusion part of the back of the said vehicle structure, The airbag characterized by the above-mentioned is provided.

Further, according to the present invention, an airbag that is normally folded and accommodated in a vehicle structure and inflated and deployed by supplying gas in an emergency, an inflator that supplies the gas to the airbag, An airbag device comprising: a retainer that fixes the airbag and the inflator; and an airbag cover that accommodates the airbag and is connected to the vehicle structure, wherein the airbag is disposed inside the airbag. A partition wall that partitions a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle, and disposed at least near the surface of the vehicle structure of the partition wall when the airbag is inflated and deployed. And a communication hole for supplying the gas from the front chamber to the rear chamber, and an upper end portion of the partition wall is connected to an upper surface portion of the airbag. There connected to said lower surface portion of the airbag, the side has a widened portion capable in close contact with the inner surface of the airbag during inflation and deployment, the airbag device is provided, characterized in that. According to the present invention, in the airbag device, the partition wall that partitions the interior of the airbag into a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle; A communication hole disposed at least near the surface of the vehicle structure of the partition wall when the bag is inflated and deployed, and for supplying the gas from the front chamber to the rear chamber, the partition wall having an upper end portion Is connected to the upper surface portion of the airbag, the lower end portion is connected to the lower surface portion of the airbag, and the upper end portion is connected to form a convex curved surface on the rear chamber side. Or the said lower end part is connected to the height position equivalent to the top part of the protrusion part of the back of the said vehicle structure, The airbag apparatus characterized by the above-mentioned is provided.

Te airbag and the airbag apparatus odor mentioned above, prior SL is formed on the top of the partition wall having a second communication hole spewing the gas to lift the airbag upwardly, said second communication hole is the communication hole The opening area may be smaller than that.

  The rear chamber may have a vent hole for releasing the gas to the outside. The front chamber may have a tail portion disposed on the surface of the vehicle structure on the front side of the vehicle with respect to the outlet of the airbag. Further, a part or all of the front chamber may be covered with an outer surface by a patch cloth.

  According to the airbag and the airbag apparatus according to the present invention described above, the partition wall for partitioning the airbag into the front chamber and the rear chamber is disposed, and the partition wall is disposed in the vicinity of the surface of the vehicle structure and gas is supplied. By forming the communication hole to be ejected, the rear portion (rear chamber) of the airbag is inflated and deployed in a state of pressing against the surface of the vehicle structure while maintaining the pressure of the front portion (front chamber) of the airbag. it can. Therefore, for example, even in the case where the airbag must be arranged so as to be discharged toward the upper side of the vehicle, such as a passenger seat airbag, the airbag is not relied on the windshield or the windshield. The airbag can be inflated and deployed, and the airbag can be reduced in size, cost, and weight.

  By forming the widened portion in the partition wall, for example, even when the side portions of the partition wall are not joined, the widened portion is in close contact with the inner surface when the airbag is inflated and deployed, and the gas from the front chamber to the rear chamber Leakage can be suppressed, and the internal pressure of the anterior chamber can be maintained.

  By connecting the left and right side portions (including the case of having a widened portion) of the partition wall to the inner surface of the airbag, the front chamber and the rear chamber can be clearly partitioned, and from the side of the partition wall Leakage can be suppressed and the internal pressure of the anterior chamber can be maintained.

  By connecting the upper end of the partition wall so as to form a curved surface that is convex toward the rear chamber, the entire partition wall can be developed to have a curved surface that is convex toward the rear chamber. The gas supplied to can be effectively received, and the internal pressure of the front chamber can be easily maintained.

  By forming the second communication hole in the partition wall, the rear chamber can be easily lifted upward, and the airbag can be quickly inflated and deployed on the front surface of the occupant.

  By connecting the lower end of the partition wall to a height position equivalent to the top of the rear projecting portion of the vehicle structure, even if there is a projecting portion that becomes an obstacle when the airbag is inflated and deployed, The partition wall can be smoothly deployed in the bag, and the front chamber and the rear chamber can be formed smoothly.

  By forming a vent hole in the rear chamber, the gas in the front chamber can be prevented from being released to the outside, and the internal pressure of the front chamber can be maintained.

  By forming a tail in the anterior chamber where the internal pressure is maintained, the front part of the airbag can be brought into contact with the surface of the vehicle structure after the airbag has been inflated and deployed, and it is rotated forward by inertial force. The behavior of the airbag to be attempted can be suppressed.

  By disposing a patch cloth on the outer surface of the front chamber, the front portion of the airbag can be reinforced, and bending of the airbag due to inertial force can be suppressed.

1 is an overall configuration diagram showing an airbag device according to a first embodiment of the present invention. It is a figure which shows the airbag shown in FIG. 1, (A) is a bird's-eye view, (B) has shown the plane expanded view of a partition wall. It is a figure which shows the airbag which concerns on 2nd embodiment of this invention, (A) is a bird's-eye view, (B) has shown the plane expanded view of a partition wall. It is a figure which shows the airbag which concerns on 3rd embodiment of this invention, (A) is a bird's-eye view, (B) has shown the plane expanded view of a partition wall. It is a figure which shows the modification of the airbag which concerns on 3rd embodiment, (A) has shown the 1st modification, (B) has shown the 2nd modification. It is a figure which shows the modification of the airbag which concerns on 3rd embodiment, (A) shows the 3rd modification, (B) shows the 4th modification, (C) has shown the 5th modification.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is an overall configuration diagram showing the airbag apparatus according to the first embodiment of the present invention. 2A and 2B are diagrams showing the airbag shown in FIG. 1, wherein FIG. 2A shows a bird's-eye view and FIG. 2B shows a plan development view of a partition wall. In FIG. 2A, for convenience of explanation, the partition wall is shown in a transparent state (solid line).

  As shown in FIGS. 1 and 2, the airbag device according to the first embodiment of the present invention is normally folded and accommodated in a vehicle structure (for example, an instrument panel I) and is gas in an emergency. , An inflator 2 for supplying gas to the airbag 1, a retainer 3 for fixing the airbag 1 and the inflator 2, and a vehicle structure (for example, The airbag cover 4 connected to the instrument panel I), and the airbag 1 is formed in the front chamber 11 formed on the front side of the vehicle and on the rear side of the vehicle. A partition wall 5 that is partitioned into a rear chamber 12 and an airbag 1 that is disposed at least near the surface of the vehicle structure (for example, the instrument panel I) of the partition wall 5 when the airbag 1 is inflated and deployed. And a communication hole 51 for supplying gas from the front chamber 11 to the rear chamber 12. The partition wall 5 has an upper end connected to the upper surface of the airbag 1 and a lower end of the lower surface of the airbag 1. It is connected to the. In the present embodiment, “front” means the front side before and after the traveling direction of the vehicle, and “rear” means the rear side before and after the traveling direction of the vehicle.

  The airbag device shown in FIG. 1 is a so-called passenger seat airbag device. The airbag 1 is, for example, a windshield in a space surrounded by an occupant P seated on a seat S, a windshield W, and an instrument panel I. Inflated and deployed so as not to contact the shield W. That is, the airbag 1 according to the first embodiment of the present invention is configured to be able to stand by itself without using the reaction force from the windshield W in the inflated state.

  Here, “the airbag 1 is self-supporting” is not limited to the case where the airbag 1 after inflating and deploying has a certain gap with the windshield W, as shown in the figure. Even when the shield W is in contact with the shield W, the reaction force from the windshield W is small and the airbag 1 is substantially independent.

  In the rear chamber 12 of the airbag 1, a vent hole 13 that discharges the gas in the airbag 1 to the outside when the occupant P contacts the airbag 1 may be formed. By forming the vent hole 13 in the rear chamber 12, the gas in the front chamber 11 can be prevented from being released to the outside, and the internal pressure of the front chamber 11 can be maintained.

  Further, the front chamber 11 of the airbag 1 may be formed with a tail portion 14 disposed on the surface of the instrument panel I (vehicle structure) on the front side of the vehicle with respect to the outlet of the airbag 1. . By forming the tail portion 14 in the front chamber 11 in which the internal pressure is maintained, the front portion of the airbag 1 is moved to the vehicle structure (for example, the instrument panel I or the instrument panel I after the airbag 1 has been inflated and deployed). Can be brought into contact with the surface of the airbag cover 4) forming a part of the airbag 1, and the behavior of the airbag 1 that attempts to rotate forward by inertial force can be suppressed.

  Further, a part or all of the front chamber 11 of the airbag 1 may be covered with a patch cloth 15 on the outer surface. By disposing the patch cloth 15 on the outer surface of the front chamber 11, the front portion of the airbag 1 can be reinforced, and bending of the airbag 1 due to inertial force can be suppressed. In FIG. 1, for convenience of explanation, the portion where the patch cloth 15 is arranged is shown by hatching. The patch cloth 15 may be formed so as to cover the entire circumference of the upper surface, the lower surface, and the side surface of the airbag 1, and may be arranged in a range including the entire front chamber 11 of the airbag 1. You may arrange | position only in the one part range of the front chamber 11 of the bag 1. FIG. The patch cloth 15 is configured by the same base fabric as the airbag 1, for example.

  In FIG. 1, a state after the airbag 1 has been inflated and deployed is illustrated, but in a state before the airbag 1 is inflated and deployed, the surface of the airbag cover 4 forms a part of the instrument panel I. Yes. Further, as shown in FIG. 1, the airbag cover 4 includes a plate-like portion 41 that constitutes a vehicle interior surface, an inner case 42 that is disposed on the back surface of the plate-like portion 41 and constitutes a discharge port of the airbag 1, The door 41 is formed in the plate-like portion 41 so as to be cleavable when the airbag 1 is inflated and deployed. In addition, about the structure of the airbag cover 4, it is not limited to what was illustrated, What was used conventionally can be selected suitably and can be used.

  The inflator 2 has a substantially cylindrical outer shape, and a gas outlet is formed on a side peripheral surface of a tip portion included in the airbag 1. The inflator 2 is fitted into an opening formed in the retainer 3 and is fixed to the retainer 3 by fixing means such as a bag ring. The inflator 2 is connected to an ECU (electronic control unit) (not shown) and is controlled based on measurement values of an acceleration sensor or the like. When the ECU detects an emergency such as a vehicle collision or sudden deceleration, the inflator 2 is ignited by the ignition current from the ECU, burns the chemical stored in the inflator 2, generates gas, and air Gas is supplied to the bag 1. Note that the shape and fixing method of the inflator 2 are not limited to those shown in the drawings, and those conventionally used can be appropriately selected and used.

  The retainer 3 is locked to a locking hole formed in the inner case 42 by, for example, a hook connected to the side surface portion, and is connected to the vehicle interior structure 6 via a joining member. In addition, about the retainer 3 and its connection structure, it is not limited to what was illustrated, What was used conventionally can be selected suitably and can be used.

  As shown in FIG. 2B, the partition wall 5 has a main body portion 5a that is deployed inside the airbag 1 and a widened portion 5b that can be in close contact with the inner surface of the airbag 1 when inflated and deployed. doing. The shape and area of the main body 5a are set so as to form a surface crossing the inside of the inflated and deployed airbag 1. The upper end 5c and the lower end 5d of the main body 5a are stitched to the inner surface of the airbag 1 as shown in FIG.

  The upper end portion 5c has, for example, an upward convex shape, and the partition wall 5 may be connected so that the upper end portion 5c forms a convex curved surface on the rear chamber 12 side. With this configuration, the entire partition wall 5 can be developed so as to have a curved surface convex toward the rear chamber 12, and the gas supplied to the front chamber 11 can be effectively received by the partition wall 5. 11 can be easily maintained. The upper end 5c is connected to the vicinity of the central portion of the airbag 1 in the front-rear direction.

  In addition, a second communication hole 52 is formed in the upper portion of the partition wall 5 (main body portion 5 a) to eject gas so as to lift the airbag 1 upward. The second communication hole 52 is opened more than the communication hole 51. The area is small. By forming the second communication hole 52, the rear chamber 12 can be easily lifted upward, and the airbag 1 can be quickly inflated and deployed on the front surface of the passenger P. When sufficient gas can be supplied to the airbag 1 (rear chamber 12) only by the communication hole 51, the second communication hole 52 may be omitted (for example, FIG. 5A and FIG. 5B). ) Etc.).

  The lower end 5d is stitched to the inner surface of the airbag 1 in the vicinity of the inflator opening 16 formed in the airbag 1, for example, as shown in FIG. Therefore, the partition wall 5 is deployed so as to cross from the lower surface portion to the upper surface portion of the airbag 1 in a state where the airbag 1 is inflated and deployed, and receives the gas from the inflator 2 like a sail of a sailing ship. The internal pressure of the front chamber 11 can be kept high. The gas supplied to the front chamber 11 supplies gas to the rear chamber 12 from the communication hole 51 and the second communication hole 52. At this time, since the opening area has a relationship of communication hole 51> second communication hole 52, the lower surface of the airbag 1 is formed on the vehicle structure (for example, the instrument panel I or a part of the instrument panel I). Gas can be supplied to press against the airbag cover 4).

  The widened portion 5b is formed so as to widen laterally from both side portions of the main body portion 5a. As shown in FIG. 2A, the widened portion 5b is arranged so as to be positioned on the front chamber 11 side when the airbag 1 is inflated and deployed. Therefore, even when the side portions of the partition wall 5 are not joined, the widened portion 5b is in close contact with the inner surface of the airbag 1, and gas leakage from the front chamber 11 to the rear chamber 12 can be suppressed. The internal pressure of the chamber 11 can be maintained. The shape and width of the widened portion 5b are appropriately changed depending on the capacity of the airbag 1, the gas pressure of the inflator 2, and the like. Further, when the pressure in the front chamber 11 becomes a certain level or more, the widened portion 5b moves to the rear chamber 12 side, and the gas in the front chamber 11 is released to the rear chamber 12, thereby The pressure can be adjusted.

  According to the airbag 1 and the airbag apparatus according to the above-described embodiment, the partition wall 5 that partitions the airbag 1 into the front chamber 11 and the rear chamber 12 is disposed, and the airbag 1 is mounted on the partition wall 5 in the vehicle structure. By forming the communication hole 51 that blows out the gas so as to be pressed against the surface of the object (for example, the instrument panel I), the pressure of the front portion (front chamber 11) of the airbag 1 is maintained and the rear of the airbag 1 is maintained. The part (rear chamber 12) can be inflated and deployed in a state where it is pressed against the surface of the vehicle structure (instrument panel I).

  The partition wall 5 forms a tension generating member because the upper surface and the lower surface of the airbag 1 are connected, and the lower surface of the airbag 1 is pressed against the surface of the vehicle structure (instrument panel I). Since the pressure is applied to the airbag 1, the upper surface of the airbag 1 can be pulled downward, the forward inertial force applied to the airbag 1 can be reduced, and the behavior of the airbag 1 is stabilized. It is possible.

  Therefore, even if the airbag 1 must be disposed so as to be discharged toward the upper side of the vehicle as in the above-described passenger seat airbag, the windshield W (front glass) is not relied upon. Thus, the airbag 1 can be inflated and deployed, and the airbag 1 can be reduced in size, cost, and weight.

  Next, an airbag according to another embodiment of the present invention will be described with reference to FIGS. Here, FIG. 3 is a figure which shows the airbag which concerns on 2nd embodiment of this invention, (A) is a bird's-eye view, (B) has shown the plane expanded view of a partition wall. 4A and 4B are views showing an airbag according to a third embodiment of the present invention, where FIG. 4A is a bird's eye view, and FIG. 4B is a plan development view of a partition wall. In addition, in each figure of FIG. 3 (A) and FIG. 4 (A), it has illustrated in the state (solid line) which permeate | transmitted the figure of the partition wall 5 for convenience of explanation.

  The airbag 1 according to the second embodiment shown in FIG. 3A is obtained by connecting (sewing or bonding) side portions 5e of the partition wall 5 in the left-right direction to the inner surface of the airbag 1. Here, as shown in FIG. 3B, since the partition wall 5 has the widened portion 5b, the left and right end portions of the widened portion 5b form the side portion 5e of the partition wall 5. Yes. Thus, by connecting the side part 5e in the left-right direction of the partition wall 5 to the inner surface of the airbag 1, the front chamber 11 and the rear chamber 12 can be clearly partitioned, and from the side part 5e of the partition wall 5 Leakage can be suppressed, and the internal pressure of the front chamber 11 can be maintained.

  In the airbag 1 according to the third embodiment shown in FIG. 4A, the widened portion 5b of the partition wall 5 is omitted, and the partition wall 5 is formed only by the main body portion 5a. At this time, the side part 5e of the main body part 5a may be curved according to the shape of the airbag 1 after completion of the inflation and deployment as shown in FIG. Also good. Moreover, you may make it sew the side part 5e on the inner surface of the airbag 1 like the airbag 1 which concerns on 2nd embodiment. Also according to the third embodiment, the airbag 1 can be partitioned into the front chamber 11 and the rear chamber 12, and the substantially same effect as the first embodiment can be exhibited. In addition, in 3rd embodiment, although it has the structure where gas leaks easily from the side part 5e of the partition wall 5, if the internal pressure of the front chamber 11 is maintaining constant pressure, it will function as this embodiment. be able to.

  Next, a modification of the above-described third embodiment will be described with reference to FIGS. Here, FIG. 5 is a figure which shows the modification of the airbag which concerns on 3rd embodiment, (A) has shown the 1st modification, (B) has shown the 2nd modification. FIG. 6 is a view showing a modification of the airbag according to the third embodiment, in which (A) shows a third modification, (B) shows a fourth modification, and (C) shows a fifth modification. ing. 5 and 6, the illustration of the partition wall 5 is shown in a transparent state (solid line) for convenience of explanation.

  In the first modification of the third embodiment shown in FIG. 5A, the lower end portion 5d of the partition wall 5 is connected to the vicinity of the edge of the discharge port of the airbag 1 (the open portion of the inner case 42). is there. Further, in the second modified example of the third embodiment shown in FIG. 5B, the lower end 5d of the partition wall 5 is made to coincide with the inflator opening 16 of the airbag 1, and a bag ring (not shown). It is made to connect with the airbag 1 by pinching by. An inflator opening and a bolt insertion hole are formed in the lower end 5d in the second modification. Thus, the connection method and connection position of the lower end portion 5d of the partition wall 5 can be appropriately changed according to the capacity of the airbag 1, the shape of the instrument panel I, and the like.

  The modified example of the third embodiment shown in FIGS. 6 (A) to 6 (C) assumes a case in which a protrusion C is formed behind the instrument panel I (vehicle structure). The vehicle interiors in recent years have been diversified, and the shape of the instrument panel I has become complicated and diversified. For example, the protrusion C in the third modified example shown in FIG. 6A is arranged on the instrument panel I with, for example, an operation screen for in-vehicle electrical components (air conditioners, audio, etc.) and an operation panel for a television screen. It is assumed that it is. Further, the protrusion C in the fourth modification shown in FIG. 6B and the fifth modification shown in FIG. 6C is formed so that the instrument panel I itself swells upward on the front surface of the occupant. It is assumed that. 6A to 6C, only a part of the instrument panel I is illustrated.

  Thus, when the protrusion part C is formed behind the discharge port of the airbag 1, the rear chamber 12 may collide with the protrusion part C when the airbag 1 is inflated and deployed. Therefore, in the third modified example shown in FIG. 6A and the fourth modified example shown in FIG. 6B, the lower end portion 5d of the partition wall 5 protrudes behind the instrument panel I (vehicle structure). They are connected so that they are at the same height as the top of the part C. With this configuration, even when there is a protruding portion C that becomes an obstacle when the airbag 1 is inflated and deployed, the partition wall 5 can be smoothly deployed in the airbag 1, and the position beyond the protruding portion C Thus, the rear chamber 12 can be expanded and deployed, and the front chamber 11 and the rear chamber 12 can be formed smoothly.

  In addition, the modification shown to FIG. 5 (A) and (B), FIG. 6 (A), and (B) is not limited to application to the airbag 1 which concerns on 3rd embodiment, 1st The present invention can also be applied to the airbag 1 according to the embodiment and the second embodiment.

  Further, in the fifth modification shown in FIG. 6C, the lower end portion 5d of the partition wall 5 in the fourth modification shown in FIG. This is stitched to the inner surface of the airbag 1 in the vicinity of the formed inflator opening 16. In this case, the communication hole 51 is formed in the middle part of the partition wall 51 (main body part 5a), and is arranged at a position beyond the top of the projecting part C of the instrument panel I (vehicle structure) at the time of expansion and deployment. Formed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention, such as being applicable to airbags other than the passenger seat airbag. .

DESCRIPTION OF SYMBOLS 1 Airbag 2 Inflator 3 Retainer 4 Airbag cover 5 Partition wall 5a Main part 5b Widening part 5c Upper end part 5d Lower end part 5e Side part 6 Car interior structure 11 Front chamber 12 Rear chamber 13 Vent hole 14 Tail 15 Patch cross 16 Inflator Opening portion 41 Plate-like portion 42 Inner case 43 Door portion 51 Communication hole 52 Second communication hole

Claims (8)

In an airbag that is normally folded and accommodated in a vehicle structure and is inflated and deployed by supplying gas in an emergency,
A partition wall that partitions the interior of the airbag into a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle;
A communication hole arranged at least near the surface of the vehicle structure of the partition wall when the airbag is inflated and deployed, and for supplying the gas from the front chamber to the rear chamber,
The partition wall has an upper end portion connected to the upper surface portion of the airbag, a lower end portion connected to the lower surface portion of the airbag, and a side portion having a widened portion that can be in close contact with the inner surface of the airbag when inflated and deployed. doing,
An airbag characterized by that. In an airbag that is normally folded and accommodated in a vehicle structure and is inflated and deployed by supplying gas in an emergency,
A partition wall that partitions the interior of the airbag into a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle;
A communication hole arranged at least near the surface of the vehicle structure of the partition wall when the airbag is inflated and deployed, and for supplying the gas from the front chamber to the rear chamber,
The partition wall has an upper end connected to the upper surface of the airbag and a lower end connected to the lower surface of the airbag .
Furthermore, the upper end portion is connected to form a convex curved surface on the rear chamber side.
An airbag characterized by that. In an airbag that is normally folded and accommodated in a vehicle structure and is inflated and deployed by supplying gas in an emergency,
A partition wall that partitions the interior of the airbag into a front chamber formed on the front side of the vehicle and a rear chamber formed on the rear side of the vehicle;
A communication hole arranged at least near the surface of the vehicle structure of the partition wall when the airbag is inflated and deployed, and for supplying the gas from the front chamber to the rear chamber,
The partition wall has an upper end connected to the upper surface of the airbag and a lower end connected to the lower surface of the airbag .
Further, the lower end portion is connected to a height position equivalent to the top portion of the rear projecting portion of the vehicle structure.
An airbag characterized by that. A second communication hole formed on an upper portion of the partition wall for ejecting the gas so as to lift the airbag upward, and the second communication hole has a smaller opening area than the communication hole; The airbag according to any one of claims 1 to 3, wherein: The airbag according to any one of claims 1 to 3, wherein the rear chamber has a vent hole for releasing the gas to the outside. The said front chamber has a tail part arrange | positioned at the surface of the said vehicle structure in the front side of a vehicle rather than the discharge port of the said airbag, The Claim 1 characterized by the above-mentioned. Air bag. The airbag according to any one of claims 1 to 3, wherein an outer surface of a part or all of the front chamber is covered with a patch cloth. The airbag is normally folded and accommodated in a vehicle structure and is inflated and deployed by supplying gas in an emergency, an inflator for supplying the gas to the airbag, and fixing the airbag and the inflator In an airbag device, comprising: a retainer; and an airbag cover that accommodates the airbag and is connected to the vehicle structure;
The said airbag is an airbag described in any one of Claims 1-7, The airbag apparatus characterized by the above-mentioned.