JP2016055735A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag device capable of preventing an excessive rise in internal pressure of a cushion with a simple configuration.SOLUTION: A curtain airbag 100 includes: an inflator 106; and a cushion 102 which is formed into a bag-shape using base cloth and receives gas from the inflator 106 so as to be inflated and deployed. The curtain airbag 100 further includes: partition sections 122 and 123 for joining base cloth of the cushion 102 so as to partition the cushion 102 into a plurality of chambers (a front main chamber 114 and a front delay chamber 116); a vent hole 136 provided in the middle between the partition sections 122 and 123 and allows gas to pass through; vent hole adjustment sections 140 and 142 for joining the base cloth of the cushion 102 continuously from the partition sections 122 and 123 so as to narrow an inner diameter of the vent hole 136 and eliminating the joining according to gas pressure applied to the vent hole 136 so as to enlarge the inner diameter of the vent hole 136.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an airbag apparatus including a cushion that is formed into a bag shape using an inflator and a base fabric, and receives and inflates a gas from the inflator.

  In recent years, airbag devices are almost standard equipment. The airbag device is a safety device that operates in an emergency such as a vehicle collision, and inflates and deploys a cushion with gas pressure to receive and protect an occupant. There are various types of airbag devices depending on the installation location and application. For example, a front air bag is provided at the center of the steering wheel in order to protect passengers in the driver's seat from collisions mainly in the front-rear direction. A curtain airbag that inflates and deploys along the side window is provided near the ceiling of the wall to protect the passengers of each seat from side collisions and subsequent rollover (rollover). Is equipped with a side airbag that inflates and deploys right next to the passenger.

  The airbag device uses a gas generation device called an inflator to inflate and deploy a cushion to restrain an occupant. The ejection of gas from the inflator is extremely quick and the internal pressure of the cushion increases instantaneously. However, an excessively high internal pressure may lead to a burst of cushions or an increased load on the occupant. Therefore, for example, the airbag device of Patent Document 1 makes it possible to control the internal pressure. In Patent Document 1, a sewing portion that is not covered with a sealing material is provided with respect to a sewing portion that is normally covered with a sealing material. The sewing portion that is not covered with the sealing material can discharge gas and serves to suppress the internal pressure of the cushion.

JP 2006-347342 A

  In recent years, we want to adjust the internal pressure of the cushion according to the situation by increasing the speed of occupant restraint by the cushion and preventing the burst of the cushion base fabric and the load on the occupant due to excessive rise of the internal pressure of the cushion. There is a request. However, it is not efficient to employ a complicated vent hole mechanism or the like composed of a large number of members because the manufacturing cost increases.

  In view of such problems, an object of the present invention is to provide an airbag device capable of preventing an excessive increase in internal pressure of a cushion with a simple configuration.

  In order to solve the above-described problems, a typical configuration of an airbag device according to the present invention includes an inflator and an air bag that is formed into a bag shape using a base cloth and receives a gas from the inflator to inflate and deploy. The airbag device further includes a partition portion that partitions the cushion into a plurality of chambers by joining the base fabric of the cushion, and is provided in the middle of the partition portion so that gas can pass therethrough. Vent hole adjustment that narrows the inner diameter of the vent hole by joining the vent hole and the cushion base fabric continuously from the partition, and expands the inner diameter of the vent hole by eliminating the bond according to the gas pressure applied to the vent hole And a portion.

  The vent hole adjusting unit can reduce the flow rate of gas flowing out from a predetermined chamber by narrowing the vent hole, and can expand and deploy the chamber more quickly. When the internal pressure of the chamber is sufficiently increased and a predetermined gas pressure is applied to the vent hole, the vent hole adjusting unit is eliminated. As a result, the inner diameter of the vent hole is enlarged, the flow rate of the gas flowing out from the chamber through the vent hole is increased from the beginning, and an increase in the internal pressure of the chamber can be suppressed. According to the above configuration, the chamber can be quickly expanded and deployed, while preventing an excessive increase in the internal pressure of the chamber and preventing a burst of the cushion base fabric. Adjustment is possible. In addition, for example, when an occupant comes into contact with a predetermined chamber, the vent hole adjusting unit is canceled according to the gas pressure applied to the vent hole, the amount of gas discharged from the chamber is increased, the internal pressure is lowered, and the occupant is It is possible to reduce the applied load.

  The vent hole adjusting unit may join the cushion base fabric by sewing that can be broken according to the gas pressure. For example, the vent hole adjusting portion may include a first sewing portion that is sewn in a circular shape continuous from the partition portion. According to these configurations, the vent hole adjusting section can be realized with a simple configuration.

  The vent hole adjusting portion may further include a second sewing portion that is concentric with the first sewing portion and has a larger diameter than the first sewing portion. In this configuration, when the gas pressure in the vent hole is increased, the diameter of the vent hole is expanded by first eliminating the second sewing portion. And if the gas pressure of a vent hole further increases, a 1st sewing part will be canceled and the diameter of a vent hole will spread further. Thus, with the above configuration, it is possible to adjust the internal pressure of the chamber by expanding the diameter of the vent hole in multiple stages in accordance with the degree of increase in the internal pressure of the chamber.

  The vent hole adjusting portion may be bonded to the cushion base fabric using a resin material that can be peeled off according to the gas pressure. For example, the vent hole adjusting part may have a first adhesive part bonded in a circular shape continuous from the partition part. Also with these configurations, the vent hole adjusting section can be realized with a simple configuration.

  The vent hole adjusting portion may have a convex adhesive portion that becomes gradually narrower from the partition portion toward the inside of the vent hole. The convex adhesive part has a narrower width toward the tip and is easy to peel off. If it is a vent hole adjustment part implement | achieved by this convex-shaped adhesion part, it can peel more smoothly according to the gas pressure concerning a vent hole.

  The vent hole adjusting portion may further include a second adhesive portion that extends gradually from the first adhesive portion toward the inside of the vent hole. Also with this configuration, it is possible to suitably realize a vent hole adjusting portion that can be eliminated according to the gas pressure applied to the vent hole.

  Said partition part is provided between adjacent chambers, and a vent hole is good to connect adjacent chambers. With this configuration, it is possible to suitably realize an airbag apparatus that can rapidly inflate and deploy a predetermined chamber and prevent an excessive increase in internal pressure of the chamber.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the airbag apparatus which can prevent the excessive raise of the internal pressure of a cushion with a simple structure.

It is the figure which illustrated the airbag apparatus of 1st Embodiment concerning this invention. It is the figure which illustrated the cushion of FIG.1 (b) independently. It is the figure which illustrated the vent hole vicinity of FIG. 2 from each direction. It is the figure which illustrated the process in which joining of the base fabric by the vent hole adjustment part of Drawing 3 (b) was canceled. It is the figure which illustrated the modification of joining of the base fabric by the vent hole adjustment part of FIG. It is the figure which illustrated the process in which the vent hole adjustment part of FIG.5 (b) is eliminated. It is the figure which illustrated the modification of the vent hole adjustment part of Fig.5 (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating an airbag device according to an embodiment of the present invention. In an example of this embodiment, the airbag apparatus according to the present invention is embodied as a curtain airbag 100. FIG. 1A is a view of the interior of the vehicle as viewed from the vehicle inner side in the vehicle width direction, and illustrates a storage form of the cushion 102 of the curtain airbag 100. In the present embodiment, the curtain airbag 100 is implemented for the right side wall of the vehicle body. The cushion 102 is a portion that is inflated and deployed in an emergency to protect the occupant, and FIG. 1B illustrates the cushion 102 being inflated and deployed. In the present application, the expression “upper” indicates the vehicle ceiling direction as viewed from the point of interest, and the expression “lower” indicates the vehicle floor direction as viewed from the point of interest.

  As illustrated in FIG. 1A, the cushion 102 is wound to form a roll-shaped storage configuration that is long in the front-rear direction of the vehicle, and is mounted on an upper portion (roof side rail 104) of the side wall of the vehicle body. Usually, the roof side rail 104 is covered with a roof trim (not shown). That is, the cushion 102 is housed in a space between the roof side rail 104 and the roof trim, and is not visible from the passenger compartment where the passenger is present. Therefore, it should be noted that even if there is a description “viewing the cushion 102 from the vehicle interior” in the text, the cushion 102 that is originally invisible from the vehicle interior is visualized by omitting the roof trim. The storage form of the cushion 102 can also be realized by folding the bellows.

  The curtain airbag 100 includes an inflator 106, which is a gas generator, on an upper portion of the cushion 102. The cushion 102 is inflated by the pressure of gas supplied from the inflator 106 to restrain the occupant. The inflator 106 employed in this embodiment is a cylinder type and has a long cylindrical shape. Inflators that are currently popular are types that are filled with a gas generating agent and burn it to generate gas, types that are filled with compressed gas and supply gas without generating heat, and There are types including both a gas generating agent and a compressed gas. Any type of inflator 106 can be used.

  FIG.1 (b) is the figure which illustrated the mode after the expansion | deployment expansion | deployment of the cushion 102 of Fig.1 (a). When a side collision or rollover (rollover) occurs in the vehicle 108, a sensor (not shown) provided in the vehicle 108 first detects an impact, and a signal is transmitted to the inflator 106 due to this. Upon receiving this signal, the inflator 106 operates and supplies gas to the cushion 102. When the gas from the inflator 106 is received, the cushion 102 expands and deploys downward along the side wall of the vehicle body (such as the side window 110 in FIG. 1A) to restrain the occupant.

  FIG. 2 is a diagram exemplifying the cushion 102 of FIG. The cushion 102 is for a curtain airbag and has a large shape that can expand along the side surface of the vehicle interior. The cushion 102 is formed into a bag shape by sewing and bonding two base fabrics constituting the surface thereof, sewing or bonding using OPW (One-Piece Woven).

  A plurality of tabs 128 are provided in the vicinity of the upper edge 126 of the cushion 102 as attachment parts to the vehicle 108. The tab 128 has a band shape and is attached to the roof side rail 104 using a bolt or the like. A string-like strap 130 is provided at the front end of the cushion 102. The strap 130 is a member that connects the cushion 102 to the front pillar 105, suppresses the swinging of the cushion 102 during expansion and deployment, stabilizes the deployment behavior, and additionally gives the cushion 102 tension in the vehicle longitudinal direction. Have.

  An inflator insertion portion 132 is provided near the upper center of the cushion 102. The inflator insertion portion 132 is provided so as to protrude above the upper edge 126 of the periphery, and the inflator 106 (see FIG. 1B) is inserted and attached. The inflator insertion portion 132 communicates with the duct portion 134 below the inflator insertion portion 132 and sends the gas from the inflator 106 to the duct portion 134. The duct portion 134 extends in the vehicle front-rear direction on the upper side of the cushion 102 and guides gas to the vehicle front side and the vehicle rear side of the cushion 102.

  The inflating region of the cushion 102 is partitioned into a plurality of chambers in consideration of the position where the occupant can come into contact. For example, a front main chamber 114 and a front delay chamber 116 are provided on the front side of the vehicle for the purpose of protecting passengers in the front seat 112 (see FIG. 1B). Since the front delay chamber 116 receives gas via the adjacent front main chamber 114, the expansion and deployment is completed later than the front main chamber 114. A rear main chamber 120 and the like are provided on the rear side of the vehicle so as to protect the occupants of the rear seat 118. Between each of these chambers, a partition part 122 or the like which is a linear non-expanding region is provided, and each chamber is partitioned by the partition part 122.

  The front main chamber 114 and the front delay chamber 116 are connected by a vent hole 136. The vent hole 136 is provided in the middle of the path connecting the partition portions 122 and 123, and supplies gas from the front main chamber 114 to the front delay chamber 116.

  The curtain airbag 100 can prevent an excessive increase in internal pressure with respect to a predetermined chamber of the cushion 102. In particular, in the present embodiment, the internal pressure of the front main chamber 114 can be adjusted according to the situation. Hereinafter, the configuration of the cushion 102 of the present embodiment will be further described.

  FIG. 3 is a diagram illustrating the vicinity of the vent hole 136 in FIG. 2 from each direction. FIG. 3A is an enlarged view of the vicinity of the vent hole 136 in FIG. As illustrated in FIG. 3A, in the vicinity of the vent hole 136, vent hole adjusting portions 140 and 142 for joining the base fabrics on the front and back of the cushion 102 are provided continuously from the partition portions 122 and 123. . The vent hole adjusting portions 140 and 142 are portions having a function of adjusting the gas flow rate of the vent hole 136.

  The vent hole adjusting portions 140 and 142 reduce the gas flow rate by narrowing the diameter of the vent hole 136 at the beginning of the expansion and expansion of the cushion 102. When the gas pressure applied to the vent hole 136 exceeds a predetermined value, the joining of the base fabric by the vent hole adjusting units 140 and 142 is canceled, and the vent hole 136 is released to increase the gas flow rate. Thus, the vent hole adjusting unit 140 initially adjusts the gas flow rate of the vent hole 136 to be small and thereafter adjusts the gas flow rate of the vent hole 136 to be increased.

  In the present embodiment, the vent hole adjusting portions 140 and 142 are realized with a simple configuration by sewing. Here, in this embodiment, the partition parts 122 and 123 are also realized by sewing. The partition parts 122 and 123 are sewn using a relatively high-strength thread that can sufficiently withstand the gas pressure when the cushion 102 is inflated and deployed. On the other hand, the vent hole adjusting portions 140 and 142 are sewn using a thread that is thinner than the sewing threads of the partition portions 122 and 123, and are far larger than the partition portions 122 and 123 as the gas pressure of the vent hole 136 increases. It can be easily broken at a low pressure.

  The vent hole adjusting portions 140 and 142 are each formed by two circular sewings. Since the vent hole adjusters 140 and 142 have the same configuration, the following description will be made with reference to the vent hole adjuster 140 as a representative. Note that it is not always necessary to provide both the vent hole adjusting portions 140 and 142. For example, the gas flow rate of the vent hole 136 can be adjusted by providing only the vent hole adjusting portion 140.

  The first sewing portion 144 is formed in a circle having a relatively small diameter and provided continuously to the partition portion 122. The second sewing portion 146 is a circle having a larger diameter than the first sewing portion 144 and is formed around the first sewing portion 144 and concentric with the first sewing portion 144.

  FIG.3 (b) is AA sectional drawing of Fig.3 (a). As illustrated in FIG. 3B, in the vent hole adjusting portion 140, the base fabrics 148 and 150 on the front and back of the cushion 102 are joined to the partition portion 122. Thereby, the inner diameter of the vent hole 136 is narrower than the distance between the partition parts 122 and 123, and the flow rate of the vent hole 136 is reduced. Therefore, the vent hole adjusting units 140 and 142 can suppress the flow rate of gas from the front main chamber 114 (see FIG. 3A) to the front delay chamber 116 and contribute to the rapid expansion and deployment of the front main chamber 114. .

  FIG. 4 is a diagram illustrating a process in which the joining of the base fabric by the vent hole adjusting units 140 and 142 in FIG. Fig.4 (a) has illustrated the state which the 2nd sewing part 146 of FIG.3 (b) fractured | ruptured. In the present embodiment, for example, when the internal pressure of the front main chamber 114 (see FIG. 3A) is sufficiently increased, when the gas pressure applied to the base fabrics 148 and 150 of the vent hole 136 is increased, first, the second sewing is performed. The portion 146 is broken and the diameter of the vent hole 136 is increased. As a result, the amount of gas discharged from the front main chamber 114 to the front delay chamber 116 is increased, and an increase in the internal pressure of the front main chamber 114 is suppressed.

  When the gas pressure applied to the base cloths 148 and 150 in the vent hole 136 is further increased, the first sewing portion 144 is also broken as shown in FIG. The diameter further expands. Therefore, the amount of gas discharged from the front main chamber 114 (see FIG. 3A) to the front delay chamber 116 is further increased, and the increase in the internal pressure of the front main chamber 114 is further suppressed.

  As described above, the vent hole adjusters 140 and 142 according to the present embodiment promote the speed of expansion and deployment of the front main chamber 114 at the beginning, but the diameter of the vent hole 136 depends on the degree of increase in the internal pressure of the front main chamber 114. It is possible to adjust the internal pressure according to the situation, such that the internal pressure is expanded in multiple stages and an excessive increase in the internal pressure of the front main chamber 114 is suppressed. Therefore, a burst of the front main chamber 114 due to an excessive increase in internal pressure can be prevented. In addition, for example, when the occupant comes into contact with the front main chamber 114, the vent hole adjusting portions 140 and 142 are broken according to the gas pressure applied to the vent hole 136, and the internal pressure of the front main chamber 114 is lowered to give the occupant. You can also reduce the load.

(Modification)
FIG. 5 is a view exemplifying a modification of bonding of the base fabric by the vent hole adjusting portions 140 and 142 of FIG. The vent hole adjusting portions 200 and 202 illustrated in FIG. 5A are different from the vent hole adjusting portions 140 and 142 in FIG. 3A in that they are realized by adhesion of a resin material. In the following description, components having the same structure and function as those already described are denoted by the same reference numerals, and description thereof is omitted.

  Since the vent hole adjusting units 200 and 202 have the same configuration, description will be made with reference to the vent hole adjusting unit 200 as a representative. The vent hole adjusting unit 200 includes a first adhesive portion 204 that continues from the partition portion 122. The first adhesive portion 204 is provided in a circular shape along the sewing line of the partition portion 122. The second bonding portion 206 is provided so as to protrude from the first bonding portion 204 toward the inside of the vent hole 136. The second adhesive portion 206 is provided in a convex shape so as to become gradually narrower toward the inside of the vent hole 136.

  FIG. 5B is a BB cross-sectional view in the vicinity of the vent hole 136 in FIG. As illustrated in FIG. 5B, in the vent hole adjusting portions 200 and 202, a resin material is continuously applied to the partition portions 122 and 123, and the base cloths 148 and 150 of the vent hole 136 are bonded. As the resin material used for the vent hole adjusting portions 200 and 202, a resin material having an adhesive strength that can be peeled according to the gas pressure applied to the vent hole 136 is used.

  FIG. 6 is a diagram illustrating a process in which the vent hole adjusting units 200 and 202 in FIG. 5B are eliminated. As illustrated in FIG. 6A, when the gas pressure in the vent hole 136 increases, first, the second adhesive portion 206 (see FIG. 5A) peels off. FIG. 6B is a CC cross-sectional view in the vicinity of the vent hole 136 in FIG. The diameter of the vent hole 136 is expanded due to the separation of the second adhesive portion 206. As a result, the amount of gas discharged from the front main chamber 114 (see FIG. 6A) to the front delay chamber 116 increases, and an increase in the internal pressure of the front main chamber 114 is suppressed.

  FIG.6 (c) has illustrated the state which the gas pressure concerning the base fabric of the vent hole of FIG.6 (b) further increased. When the gas pressure in the vent hole 136 is high, the first adhesive portion 204 is also peeled off. FIG. 6D is a DD cross-sectional view in the vicinity of the vent hole 136 in FIG. When even the first bonding portion 204 is peeled off as shown in FIG. 6D, the diameter of the vent hole 136 is further expanded as compared with the state shown in FIG. Therefore, the amount of gas discharged from the front main chamber 114 (see FIG. 6C) to the front delay chamber 116 is further increased, and the increase in the internal pressure of the front main chamber 114 is further suppressed.

  As described above, it is possible to adjust the gas flow rate of the vent hole with a simple configuration even by the vent hole adjusting unit using the resin material. The vent hole adjusting units 200 and 202 also promote the expediting and expansion of the front main chamber 114 at the beginning, and then expand the diameter of the vent hole 136 according to the degree of the increase in the internal pressure of the front main chamber 114, thereby increasing the front main chamber. An increase in the internal pressure 114 can be suppressed. In particular, the vent hole adjusting portions 200 and 202 realized by bonding can release the vent hole 136 to various diameters according to the gas pressure of the vent hole 136, and the internal pressure of the front main chamber 114 can be more suitable for the situation. Can be adjusted. As a result, the vent hole adjusting portions 200 and 202 prevent bursts due to excessive internal pressure of the front main chamber 114, and when the occupant comes into contact with the front main chamber 114, the internal pressure of the front main chamber 114 is lowered to the occupant. The load to be given can be reduced.

  FIG. 7 is a diagram illustrating a modified example of the vent hole adjusting units 200 and 202 in FIG. The vent hole adjusting portion that can be realized by bonding with a resin material is not limited to the configuration of the vent hole adjusting portions 200 and 202 illustrated in FIG. The vent hole adjusting portion can be realized only by the convex adhesive portions 220 and 222 illustrated in FIG. The convex adhesive portions 220 and 222 are gradually narrowed from the partition portions 122 and 123 toward the inside of the vent hole. In other words, the convex adhesive portions 220 and 222 have a configuration using only the first adhesive portion 204 of FIG. The convex adhesive portions 220 and 222 have a narrower width toward the tip and are easy to peel off. Even the vent hole adjusting portion realized by the convex adhesive portions 220 and 222 can be more smoothly peeled according to the gas pressure applied to the vent hole 136, and the vent hole 136 can be released to various diameters. .

  In the embodiment described above, the curtain airbag 100 is illustrated as an example of the airbag device that implements the technical idea of the present invention. However, the technical idea of the present invention is not limited to the curtain airbag 100. For example, the present invention can be widely implemented in various airbag devices such as a side airbag built in a seat and a knee airbag installed inside an interior garnish at a front portion.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for an airbag device that includes a cushion that is formed into a bag shape using an inflator and a base cloth and that receives and inflates gas from the inflator.

DESCRIPTION OF SYMBOLS 100 ... Curtain airbag, 102 ... Cushion, 104 ... Roof side rail, 105 ... Front pillar, 106 ... Inflator, 108 ... Vehicle, 110 ... Side window, 112 ... Front seat, 114 ... Front main chamber, 116 ... Front delay Chamber 118, rear seat 120, rear main chamber 122, compartment 126, upper edge of cushion 128, tab 130, strap 132, inflator insertion part, 134 duct part, 136 vent hole, 140 , 142 ... vent hole adjusting part, 144 ... first sewing part, 146 ... second sewing part, 148, 150 ... base fabric on the front and back of the vent hole, 200, 202 ... modified vent hole adjusting part, 204 ... first Adhesive part, 206 ... second adhesive part, 220, 222 ... convex adhesive part

Claims (9)

An airbag device including an inflator and a cushion that is formed into a bag shape using a base fabric and receives and inflates a gas from the inflator,
The airbag device further includes
A partition section partitioning the cushion into a plurality of chambers by joining the base fabric of the cushion;
A vent hole that is provided in the middle of the partition and allows gas to pass through;
A vent which narrows the inner diameter of the vent hole by joining the base fabric of the cushion continuously from the partition part and expands the inner diameter of the vent hole according to the gas pressure applied to the vent hole. Hall adjustment part,
An airbag device comprising:   The airbag device according to claim 1, wherein the vent hole adjusting portion joins the base fabric of the cushion by sewing that can be broken according to the gas pressure.   The airbag apparatus according to claim 2, wherein the vent hole adjusting portion includes a first sewing portion that is sewn in a circular shape continuous from the partition portion.   The airbag device according to claim 3, wherein the vent hole adjusting portion further includes a second sewing portion that is concentric with the first sewing portion and has a larger diameter than the first sewing portion.   The airbag device according to claim 1, wherein the vent hole adjusting unit adheres a base fabric of the cushion using a resin material that can be peeled according to the gas pressure.   The airbag device according to claim 5, wherein the vent hole adjusting portion includes a first bonding portion bonded in a circular shape continuous from the partition portion.   6. The airbag device according to claim 5, wherein the vent hole adjusting portion has a convex adhesive portion that becomes gradually narrower from the partition portion toward the inside of the vent hole.   The airbag device according to claim 6, wherein the vent hole adjusting portion further includes a second adhesive portion that extends from the first adhesive portion toward the inside of the vent hole so as to become gradually narrower. The partition is provided between the adjacent chambers,
The airbag device according to claim 1, wherein the vent hole connects the adjacent chambers.

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