JP6379444B2 - Airbag device - Google Patents

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. For example, a cylindrical inflator 5 is used in the airbag device described in Patent Document 1. The inflator 5 is inserted into a cylindrical gas introduction portion 3 provided in the airbag, and is attached by winding a resin band 11 from the outside.

JP 2014-124965 A

  High-pressure gas is ejected from the gas ejection holes of the inflator. In particular, in a so-called pyrotechnics inflator in which the gas generating agent burns, the gas becomes a high temperature and a high pressure. Therefore, in the configuration in which the inflator described in Patent Document 1 and the base fabric of the cushion are in close contact with each other, there is a possibility that the load due to gas ejection is locally concentrated and the base fabric may be damaged or burst (burst). is there.

  In view of such problems, an object of the present invention is to provide an airbag device capable of preventing local concentration of gas pressure from an inflator and preventing damage to a base fabric.

  In order to solve the above-described problems, a typical configuration of an airbag device according to the present invention includes a cushion formed in a bag shape using a base fabric, and is inserted into the cushion and supplies a gas for inflation and deployment to the cushion. An inflator that is provided, a reinforcing cloth provided around the inflator inside the cushion, and a protrusion that protrudes from the reinforcing cloth and forms a gap between the inflator and the cushion.

  According to the said structure, it can prevent that an inflator and the inner surface of a cushion closely_contact | adhere. Therefore, the pressure of the gas ejected from the inflator can be prevented from concentrating locally on the reinforcing cloth and the base cloth of the cushion, and damage and bursting of these base cloth and the like can be prevented.

  Said protrusion part is provided in the surface of a reinforcement cloth, and may form a clearance gap between inflators by contacting an inflator. With this configuration, a gap can be efficiently formed between the inflator and the inner surface of the cushion.

  The airbag apparatus may further include another reinforcing cloth that covers the reinforcing cloth provided with the protrusions. It is also possible to form a gap between the inflator and the cushion by covering the protrusion with another reinforcing cloth and forming a shape protruding together with the other reinforcing cloth.

  The protruding portion may be provided by joining a part of the reinforcing cloth together. The joining at this time may be sewing. Bonding may be bonding or heat welding. With these configurations, the protrusion can be realized with a simple structure.

  Said inflator is cylindrical shape, Comprising: A projection part may be provided in the several places spaced apart in the longitudinal direction of the inflator. With the protruding portion having this configuration, a gap can be efficiently formed between the inflator and the inner surface of the reinforcing cloth.

  The protrusions may extend in the circumferential direction of the inflator. The plurality of protrusions may extend in a predetermined direction and intersect each other. Also with the protrusions having these configurations, a gap can be efficiently formed between the inflator and the inner surface of the reinforcing cloth.

  The protrusions may be linear and provided at least on both sides of the gas discharge hole of the inflator. By bringing the linear protrusions into contact with both sides of the gas discharge hole of the inflator so as to sandwich the gas discharge hole, a gap can be efficiently formed between the inflator and the inner surface of the reinforcing cloth.

  The reinforcing cloth may be provided around the gas discharge hole of the inflator. With this configuration, the cushion base fabric can be efficiently protected from gas pressure.

  The airbag apparatus may further include a diffuser provided inside the cushion for rectifying gas from the inflator, and the reinforcing cloth may be provided inside the diffuser. Also with this configuration, a gap is formed between the inflator and the inner surface of the reinforcing cloth, and the gas pressure of the inflator can be prevented from concentrating locally.

  The airbag device may further include a gas guide provided inside the cushion to guide the gas from the inflator in a predetermined direction, and the reinforcing cloth may be provided inside the gas guide. Also with this configuration, a gap is formed between the inflator and the inner surface of the reinforcing cloth, and the gas pressure of the inflator can be prevented from concentrating locally.

  The cushion is for a curtain airbag that covers a side portion of the vehicle interior, and the airbag device is further provided to protrude upward at a predetermined position on the upper edge of the cushion, and an inflator is inserted and attached. The inflator attaching part is provided, and the reinforcing cloth may be provided inside the inflator attaching part. Also with this configuration, a gap is formed between the inflator and the inner surface of the reinforcing cloth, and the gas pressure of the inflator can be prevented from concentrating locally.

  ADVANTAGE OF THE INVENTION According to this invention, the airbag apparatus which can prevent local concentration of the gas pressure from an inflator and can prevent damage to a base fabric is realizable.

It is the figure which illustrated the airbag apparatus concerning embodiment of this invention. It is the figure which illustrated the cushion of FIG.1 (b) independently. It is a figure which expands and illustrates the gas guide of FIG. It is the figure which illustrated the internal structure of the gas guide of FIG. It is a perspective view of the 1st reinforcement cloth of Drawing 4 (a). It is the figure which illustrated the detailed structure of the gas guide of FIG. It is the figure which illustrated the modification of the gas guide of FIG.6 (b). It is the figure which illustrated the 1st modification of the installation place of the 1st reinforcement cloth of FIG. It is the figure which illustrated the 2nd modification of the installation location of the 1st reinforcement cloth of FIG. It is the figure which illustrated the modification of the projection part illustrated to Fig.6 (a).

E1 ... Gap, L1 ... Center line, 100 ... Curtain airbag, 102 ... Cushion, 104 ... Roof side rail, 105 ... Front pillar, 106 ... Inflator, 107 ... Gas exhaust hole, 108 ... Vehicle, 112 ... Front seat, 116: Front delay chamber, 118 ... Rear seat, 120 ... Rear main chamber, 122 ... Partition, 126 ... Upper edge of cushion, 128 ... Tab, 130 ... Strap, 132 ... Inflator mounting part, 134 ... Duct part, 136 ... Gas guide, 137 ... Gas guide base fabric, 138 ... Gas guide upper part, 140 ... Gas guide lower part, 142 ... First reinforcement cloth, 143 ... First reinforcement cloth inner surface, 144, 146 ... Sewing line 148, 150 ... projections, 152, 154 ... sewing, 156 ... second reinforcing cloth, 158 ... third reinforcing cloth 160, 162 ... Sewing line, 164 ... Oblique side of base cloth of gas guide, 166 ... Lower side of base cloth of gas guide, 170 ... Diffuser, 180, 182 ... Intersecting protrusions, 200 ... Gas guide of modified example, 202 ... 4th reinforcing cloth

  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).

  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 of the front delay chamber 116 is completed after 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.

  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 mounting portion 132 is provided near the upper center of the cushion 102. The inflator mounting portion 132 is provided so as to protrude upward from the upper edge 126 around the periphery, and the inflator 106 (see FIG. 1B) is inserted from the rear of the vehicle with the longitudinal direction thereof set in the longitudinal direction of the vehicle. It is attached. The inflator attachment portion 132 communicates with the duct portion 134 below the inflator attachment 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.

  As illustrated by a broken line in FIG. 2, a gas guide 136 is provided inside the inflator mounting portion 132. The gas guide 136 is a part that first receives the gas from the inflator 106 when the inflator 106 is inserted. The gas guide 136 has a function of guiding the gas from the inflator 106 in a predetermined direction, a function of protecting the vicinity of the inflator attachment portion 132 from the gas, and the like. have.

  FIG. 3 is an enlarged view illustrating the gas guide 136 of FIG. FIG. 3A is a perspective view illustrating the gas guide 136 alone. As illustrated in FIG. 3A, the gas guide 136 includes an upper portion 138 into which the inflator 106 is inserted, and a lower portion 140 that receives gas from the upper portion 138 and guides the gas in the vehicle front-rear direction. Has been. FIG. 3B is a cross-sectional view taken along line AA of the gas guide 136 in FIG. The AA cross section is a cross section obtained by vertically cutting the inflator mounting portion 132 of the cushion 102 and the gas guide 136 therein. As illustrated in FIG. 3B, the upper portion 138 and the lower portion 140 of the gas guide 136 are both tubular. By providing the gas guide 136 inside the inflator attachment portion 132, the pressure resistance, heat resistance, and the like in the vicinity of the inflator attachment portion 132 can be improved.

  FIG. 4 is a diagram illustrating the internal structure of the gas guide 136 of FIG. 4A illustrates the internal structure of the gas guide 136 when the gas guide 136 is viewed from the vehicle interior as in FIG. In the present embodiment, a reinforcing cloth (first reinforcing cloth 142) is installed inside the gas guide 136 in order to suppress a load due to gas.

  In the present embodiment, the first reinforcing cloth 142 is realized as a structure in which the strength is increased by folding the base cloth a plurality of times. The first reinforcing cloth 142 is sewn to the gas guide 136 by sewing lines 144 and 146 around the gas discharge hole 107 on the front end side of the inflator 106. Providing the first reinforcing cloth 142 only in such a limited range can efficiently protect the base cloth of the cushion 102 from the gas pressure, and can reduce the number of used cloths as a material. This is also beneficial.

  Furthermore, protrusions 148 and 150 are provided at two locations on the inner surface of the first reinforcing cloth 142. FIG.4 (b) is BB sectional drawing of the gas guide of Fig.4 (a). As illustrated in FIG. 4B, the protrusions 148 and 150 protrude toward the inflator 106 and contact the inflator 106. The protrusions 148 and 150 form a gap E1 (hollow layer) between the inflator 106 and the inner surface 143 of the first reinforcing cloth 142. By forming this gap E1, in the curtain airbag 100, the inflator 106 and the inner surface 143 of the first reinforcing cloth 142 are prevented from coming into close contact with each other, and the inflator mounting portion 132 of the cushion 102 (FIG. 3B). ) Is secured to the base fabric. With this configuration, the pressure of the gas ejected from the inflator 106 is prevented from being locally concentrated on the first reinforcing cloth 142 and the base fabric of the inflator mounting portion 132, and damage such as damage to the base fabric, burst, melting, etc. It is possible to prevent problems.

  The protrusions 148 and 150 are provided at two positions spaced in the longitudinal direction of the inflator 106. Further, as illustrated in FIG. 4A, the protrusions 148 and 150 are provided so as to extend in the circumferential direction of the inflator 106. The protrusions 148 and 150 having this configuration efficiently support the inflator 106 in the longitudinal direction of the inflator 106 to stabilize the distance from the inflator 106 to the first reinforcing cloth 142 and the inflator attachment portion 132 (see FIG. 3B). Secure. However, there is no limitation on the number of protrusions to be installed and the direction in which the protrusions are provided. Further, by providing a plurality of protrusions, the inflator 106 can be supported more stably, and a gap can be efficiently formed between the inflator 106 and the inner surface 143 of the first reinforcing cloth 142. It is also possible to provide a plurality of protrusions extending in different directions.

  As illustrated in FIG. 4A, in this embodiment, the protrusions 148 and 150 are linear, and at least sandwich the gas discharge holes 107 on both sides of the gas discharge holes 107 of the inflator 106. And it is provided so that it may extend in the direction substantially orthogonal to the longitudinal direction of the inflator 106. Accordingly, as illustrated in FIG. 4B, the linear protrusions 148 and 150 are brought into contact with both sides of the gas discharge hole 107 of the inflator 106, and the inflator 106 and the inner surface 143 of the first reinforcing cloth 142 are brought into contact with each other. It is possible to efficiently form the gap E1 therebetween.

  FIG. 5 is a perspective view of the first reinforcing cloth 142 of FIG. The first reinforcing cloth 142 is formed by folding a plurality of base cloths. The protrusions 148 and 150 are provided by joining a part of the base fabric of the first reinforcing fabric 142 together. For example, in this embodiment, the protrusions 148 and 150 are provided by bringing a part of the base fabric together and performing sewing 152 and 154. Thus, the protrusions 148 and 150 are realized with a simple configuration. In addition, the protrusions 148 and 150 can also be realized by bonding the base fabric by bonding or heat welding. In the bonding by bonding or heat welding, the protrusions 148 and 150 can be simply formed by processing such as application of adhesive or heating.

  FIG. 6 is a diagram illustrating a detailed configuration of the gas guide 136 of FIG. FIG. 6A is a diagram illustrating a state where the gas guide 136 is opened. The gas guide 136 is formed by installing a plurality of cloth materials such as a first reinforcing cloth 142 inside a piece of base cloth 137, folding the center line L1, and sewing the hypotenuse 164 and the lower side 166.

  FIG. 6B is an exploded view of the gas guide 136 of FIG. As illustrated in FIG. 6B, in addition to the first reinforcing cloth 142 provided on the surface of the base cloth 137, a second reinforcing cloth 156 and a third reinforcing cloth 158 are installed thereunder. . The third reinforcing cloth 158 is a relatively large reinforcing cloth that covers the entire base cloth 137 in the vehicle width direction. The second reinforcing cloth 156 is a reinforcing cloth that is installed between the third reinforcing cloth 158 and the first reinforcing cloth 142 and has the same size as the first reinforcing cloth 142.

  FIG.6 (c) is CC sectional drawing of Fig.6 (a). As illustrated in FIG. 6C, the third reinforcing cloth 158 is sewn to the base cloth 137 by the sewing lines 160 and 162 and the sewing lines 144 and 146. Although not appearing in FIG. 6C, the second reinforcing cloth 156 is also joined to the base cloth 137 by sewing. By using a plurality of reinforcing cloths in addition to the first reinforcing cloth 142, the heat resistance and pressure resistance of the gas guide 136 are further improved, durability against high-temperature and high-pressure gas is improved, and the gas guide 136 and the cushion 102 are improved. This makes it possible to prevent damage to the base fabric more completely. Further, by arranging the second reinforcing cloth 156 and the third reinforcing cloth 158 under the first reinforcing cloth 142 having the protrusions 148 and 150, the thickness of the entire fabric is ensured and the sewing work can be easily performed. This also leads to improved manufacturability.

(Modification of gas guide)
FIG. 7 is a diagram illustrating a modification of the gas guide 136 of FIG. The gas guide 200 illustrated in FIG. 7A includes a fourth reinforcing cloth 202 that covers the first reinforcing cloth 142 as another reinforcing cloth for the first reinforcing cloth 142. FIG. 7B is a cross-sectional view of the gas guide 200 of FIG. 7A corresponding to FIG. As illustrated in FIG. 7B, the fourth reinforcing cloth 202 covers the first reinforcing cloth 142 and is sewn to the base cloth 137 by the sewing lines 160 and 162 and the sewing lines 144 and 146. Therefore, the first reinforcing cloth 142 is protected from direct contact with the gas by the fourth reinforcing cloth 202.

  The fourth reinforcing cloth 202 is a cloth material and protrudes along the protruding portions 148 and 150 of the first reinforcing cloth 142. Therefore, the gap can be formed between the inflator 106 and the inflator 106 by contacting the inflator 106 with the fourth reinforcing cloth 202 protruding along the protrusions 148 and 150. As a result, it is possible to prevent the gas from locally concentrating on each reinforcing cloth, base cloth 137 and the like, and to prevent problems such as burst and melting.

  As illustrated in FIG. 7C, the fourth reinforcing cloth 202 is stretched between the protrusions 148 and 150 of the first reinforcing cloth 142, and there is a gap between the first reinforcing cloth 142. It may have occurred. However, even in that case, the fourth reinforcing cloth 202 can be retracted between the protrusions 148 and 150 by receiving the gas pressure, and a gap can be formed between the inflator 106 and the fourth reinforcing cloth 202.

(Variation of installation location of reinforcing cloth)
FIG. 8 is a diagram illustrating a first modification of the installation location of the first reinforcing cloth 142 in FIG. 4. In FIG. 4, the first reinforcing cloth 142 is installed on the gas guide 136, but in FIG. 8, the first reinforcing cloth 142 is directly provided inside the inflator mounting portion 132 of the cushion 102. Also with this configuration, a gap E1 (see FIG. 4B) is formed between the inflator 106 and the inner surface 143 of the first reinforcing cloth 142, and a distance from the inflator 106 to the inflator attachment portion 132 can be secured. . And it can prevent that the gas pressure of the inflator 106 concentrates locally with respect to the base fabric of the 1st reinforcement cloth 142 and the inflator attachment part 132, and can prevent these damages.

  FIG. 9 is a diagram illustrating a second modification of the installation location of the first reinforcing cloth 142 in FIG. 4. In FIG. 9A, a cylindrical diffuser 170 is provided around the inflator 106. The diffuser 170 is a rectifying member that rectifies the gas from the inflator 106 in a predetermined direction (for example, the longitudinal direction), and is used in, for example, a side airbag. The first reinforcing cloth 142 can also be provided inside such a diffuser 170.

  FIG. 9B is a DD cross-sectional view of the diffuser 170 in FIG. As illustrated in FIG. 9A, by providing the first reinforcing cloth 142 inside the diffuser 170, the inner surface of the first reinforcing cloth 142 is provided on the inflator 106 by the projections 148 and 150 of the first reinforcing cloth 142. Even if 143 contacts, a gap (hollow layer) can be secured between them. Also with this configuration, it is possible to secure a distance from the inflator 106 to the base fabric of the diffuser 170, prevent concentration of gas pressure, and prevent damage to each base fabric.

  FIG. 10 is a diagram illustrating a modification of the protrusions 148 and 150 illustrated in FIG. In the first reinforcing cloth 142 illustrated in FIG. 10, two protrusions 180 and 182 are provided so as to intersect each other. As described above, the plurality of protrusions may be provided so as to extend in different directions, respectively, or a part thereof may intersect. The projections 180 and 182 having these configurations can also efficiently secure the gap E1 (see FIG. 4B) between the inflator 106 and the inner surface 143 of the first reinforcing cloth 142.

  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.

Claims (13)

A cushion formed into a bag shape using a base fabric;
An inflator that is inserted into the cushion and supplies a gas for inflation and deployment to the cushion;
A reinforcing cloth provided around the inflator inside the cushion;
A protrusion that protrudes from the reinforcing fabric and forms a gap between the inflator and the cushion;
Other reinforcing cloth covering the reinforcing cloth provided with the protrusion,
An air bag device comprising:   A cushion formed into a bag shape using a base fabric;
  An inflator that is inserted into the cushion and supplies a gas for inflation and deployment to the cushion;
  A reinforcing cloth provided around the inflator inside the cushion;
  A protrusion that protrudes from the reinforcing fabric and forms a gap between the inflator and the cushion;
With
  The airbag device according to claim 1, wherein the protrusion is linear and provided at least on both sides of the gas discharge hole of the inflator. The airbag device further includes
A gas guide provided in the cushion for guiding gas from the inflator in a predetermined direction;
It said reinforcing fabric, an air bag device according to claim 1 or 2, characterized in that provided inside the gas guide. A cushion formed into a bag shape using a base fabric;
An inflator that is inserted into the cushion and supplies a gas for inflation and deployment to the cushion;
A reinforcing cloth provided around the inflator inside the cushion;
A protrusion that protrudes from the reinforcing fabric and forms a gap between the inflator and the cushion;
A diffuser provided inside the cushion for rectifying the gas from the inflator;
Equipped with a,
It said reinforcing fabric, an air bag device according to claim Rukoto provided inside the diffuser. The said protrusion part is provided in the surface of the said reinforcement cloth, and forms the said clearance gap between this inflator by contacting the said inflator, The any one of Claim 1 to 4 characterized by the above-mentioned. Airbag device. The airbag device according to any one of claims 1 to 5 , wherein the protrusion is provided by joining a part of the reinforcing cloth so as to join each other. The airbag device according to claim 6 , wherein the joining is sewing. The airbag device according to claim 6 , wherein the joining is adhesion or heat welding. The inflator has a cylindrical shape,
The airbag device according to any one of claims 1 to 8 , wherein the protrusions are provided at a plurality of locations spaced in the longitudinal direction of the inflator. The airbag device according to claim 9 , wherein the protrusion extends in a circumferential direction of the inflator. The airbag device according to any one of claims 1 to 10 , wherein the plurality of protrusions extend in a predetermined direction and intersect each other. The airbag device according to any one of claims 1 to 11 , wherein the reinforcing cloth is provided around a gas discharge hole of the inflator. The cushion is for a curtain airbag covering a side portion of a vehicle interior,
The airbag device further includes
Provided to protrude upward at a predetermined location on the upper edge of the cushion, and provided with an inflator attachment portion to which the inflator is inserted and attached;
The airbag device according to any one of claims 1 to 12 , wherein the reinforcing cloth is provided inside the inflator attachment portion.

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