JP6990266B2 - Side airbag device - Google Patents

Description

The present invention relates to a side airbag device mounted on a vehicle.

Airbag devices are almost standard equipment on recent vehicles. The airbag device is a safety device that operates in an emergency such as a vehicle collision, and expands and deploys a bag-shaped airbag cushion with gas pressure to receive and protect occupants.

There are various types of airbag devices depending on the installation location and application. For example, a front airbag device is provided in the center of the steering to protect the driver from a collision from the front-rear direction. In addition, in order to protect the occupants from impacts from the vehicle width direction due to side collisions, etc., a curtain airbag device is installed near the ceiling above the side window, and a side airbag device is installed on the side of the seat. There is.

The airbag cushion of a general airbag device is stored in each part of the vehicle in a wound or folded storage form. For example, Patent Document 1 discloses a technique relating to a cover member 106 for wrapping an airbag cushion by the applicant of the present application. In Patent Document 1, assuming a side airbag device, the cushion member 106 is wrapped with a cover member 114 and installed on the side of the backrest of a vehicle seat. The cover member 114 is made of a non-woven fabric or the like, and is partially broken by the expansion and expansion of the cushion member 106.

JP-A-2015-74295

Currently, the side airbag device is required to further improve the occupant restraint performance of the airbag cushion. In order to improve the occupant restraint performance, for example, measures such as securing a part that supports the airbag cushion can be mentioned. However, the airbag cushion of the side airbag device is often provided at the end of the backrest of the vehicle seat, and often only a soft member such as urethane material is present on the side opposite to the occupant. In addition, as in the case of the cover member 114 of Patent Document 1 described above, it is necessary to devise a method for maintaining the storage form of the airbag cushion.

In view of such problems, it is an object of the present invention to provide a side airbag device that improves occupant restraint performance and maintains a shape when stored.

In order to solve the above problems, a typical configuration of the side airbag device according to the present invention is a frame side plate portion along the side surface of the backrest of the internal frame of the vehicle seat, and air attached to the frame side plate portion. A side airbag device including a bag module, in which the airbag module is attached to the center side of the frame side plate portion in the width direction of the backrest and extends to the front of the frame side plate portion. The inflator fixed to the center side of the bracket, the airbag cushion fixed to the center side of the bracket together with the inflator in a predetermined storage form that is wound or folded, and the airbag cushion in the bracket and the storage form are wound. It includes a soft cover that can be broken by the expansion pressure of the airbag cushion, and the bracket has a through hole through which the stud bolt extending from the inflator penetrates, and a hook provided at a predetermined position in front of the frame side plate portion. The soft cover is characterized by having a bolt mooring hole hooked on a stud bolt penetrating the bracket and a hook mooring hole hooked on a hook of the bracket.

The above-mentioned airbag cushion is arranged on the center side with respect to the frame side plate portion and the bracket of the vehicle seat. Therefore, with the above configuration, it becomes easy to obtain a reaction force from the bracket when the airbag cushion restrains the occupant, and the occupant restraint performance of the airbag cushion can be improved. In addition, in the above configuration, the soft cover can be easily wrapped around the bracket and airbag cushion by utilizing the stud bolts of the inflator and the hooks of the bracket. This makes it possible to suitably hold the storage form of the airbag cushion not only while the vehicle is running but also before the airbag module is assembled in the vehicle.

The soft cover may have a fragile portion that can be broken by the expansion pressure of the airbag cushion. The soft cover makes it possible to suitably open the airbag cushion by breaking the fragile portion.

The plurality of hook mooring holes described above may be formed side by side in a row, and the fragile portion of the soft cover may be provided in the area between two adjacent hook mooring holes. This configuration allows the soft cover to suitably open the airbag cushion.

The above bracket extends outward in the width direction of the backrest across the front edge of the frame side plate from the base where the inflator and the airbag cushion are fixed along the frame side plate, and further bends and extends forward. A through hole may be provided at the base and a hook may be provided at the reaction plate.

According to the above configuration, since the bracket is provided with the reaction force plate, the airbag cushion can efficiently obtain the reaction force from the bracket.

The above bracket may have a predetermined rigidity that is harder than the airbag cushion and the soft cover. This allows the bracket to suitably support the airbag cushion during expansion and deployment.

In order to solve the above problems, another typical configuration of the side airbag device according to the present invention is attached to a frame side plate portion along the side surface of the backrest and a frame side plate portion in the internal frame of the vehicle seat. A side airbag device equipped with an airbag module, which is a bracket attached to the center side of the frame side plate portion in the width direction of the backrest and extending forward from the frame side plate portion. An inflator fixed to the center side of the bracket, an airbag cushion that is wound or folded in a predetermined storage form and fixed to the center side of the bracket together with the inflator, and an airbag cushion in the bracket and storage form. The bracket has a through hole through which the stud bolt extending from the inflator penetrates, and a predetermined insertion hole provided in a position in front of the frame side plate portion, and is soft. The cover is characterized by having a bolt mooring hole hooked on a stud bolt penetrating the bracket and a hook hooked on a bracket insertion hole.

The above-mentioned airbag cushion is arranged on the center side with respect to the frame side plate portion and the bracket of the vehicle seat. Therefore, even in the above configuration, it becomes easy to obtain a reaction force from the bracket when the airbag cushion restrains the occupant, and the occupant restraint performance of the airbag cushion can be improved. In addition, in the above configuration, the soft cover has bolt mooring holes and hooks that can be easily wrapped around brackets and airbag cushions. This makes it possible to suitably hold the storage form of the airbag cushion not only while the vehicle is running but also before the airbag module is assembled in the vehicle.

The above-mentioned soft cover may be deformed by the expansion pressure of the airbag cushion and fall off from the insertion hole of the bracket. This configuration allows the soft cover to suitably open the airbag cushion as it expands and unfolds.

The soft cover may have a fragile portion that can be broken by the expansion pressure of the airbag cushion. The soft cover makes it possible to suitably open the airbag cushion by breaking the fragile portion.

The above bracket extends outward along the frame side plate portion in the width direction of the backrest across the base portion where the inflator and the airbag cushion are fixed, and the front edge of the frame side plate portion from the base portion, and further bends and extends forward. The reaction force plate and the through hole may be provided in the base portion, and the insertion hole may be provided in the reaction force plate.

Even in the above configuration, since the bracket is provided with the reaction force plate, the airbag cushion can efficiently obtain the reaction force from the bracket.

The hook may have a predetermined rigidity that is harder than the soft cover body and softer than the bracket. As a result, the hook is deformed when it receives a certain amount of force due to the expansion pressure of the airbag cushion, and is suitably dropped from the insertion hole.

According to the present invention, it becomes possible to provide a side airbag device that improves occupant restraint performance and maintains a form when stored.

It is a figure which illustrated the side airbag apparatus which concerns on embodiment of this invention. It is a figure exemplifying the airbag cushion of each state of FIG. 1 from the side of a seat. FIG. 2B is a perspective view of the side airbag device of FIG. 2B. It is the figure which separated the soft cover from the bracket of FIG. 3 (b). FIG. 2B is a sectional view taken along the line AA of the airbag module before operation in FIG. 2B. It is a figure exemplifying the first modification example of the soft cover of FIG. It is a figure exemplifying the modification of each of the bracket and the soft cover of FIG.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate explanations, and elements not directly related to the present invention are not shown. do.

FIG. 1 is a diagram illustrating the side airbag device 100 according to the embodiment of the present invention. FIG. 1A exemplifies a state in which the airbag cushion is activated. In FIG. 1A, the side airbag device 100 and the seat 102 for a vehicle to which the side airbag device 100 is applied are illustrated from the right side in the vehicle width direction in front of the vehicle. In addition, the front-back direction with respect to the seat 102 is indicated by arrows F (Forward) and B (Back), the left-right direction is indicated by arrows L (Left) and R (Right), and the up-down direction is indicated by arrows U (up) and D (down), respectively. It is illustrated as appropriate.

FIG. 1A illustrates only the inner frame 104 of the backrest of the seat 102, omitting the skin and the seat pad (for example, urethane material). The inner frame 104 is a member that serves as a skeleton built in the backrest. It is assumed that the seat 102 is arranged on the left side of the front row. However, the side airbag device 100 can be installed in the front row, the rear row, and any seat on either the left or right side of the vehicle. Further, although the seat 102 normally faces the front of the vehicle, it is assumed that the seat 102 rotates and faces the rear. Therefore, the direction illustrated by the arrow in each figure is not intended to be limited to the front, rear, left, and right directions with respect to the vehicle, and the front direction is defined as "front" when viewed from the occupant who is normally seated in the seat 102, and the back side. The direction is "after". Similarly, the direction of the occupant's right hand at this time is "right", and the direction of the left hand is "left". Further, the direction toward the head is "up" and the direction toward the legs is "down" with respect to the center of the occupant's body at this time.

The side airbag device 100 uses the airbag cushion 108 to restrain an occupant seated in the seat 102 from the side in an emergency such as when an impact occurs on the vehicle. The airbag cushion 108 is a bag-shaped member that receives an occupant, and is formed by stacking and sewing or adhering a plurality of base fabrics constituting the surface thereof, or by spinning using OPW (One-Piece Woven). Has been done.

The inflator 110 is a gas generator, which operates by receiving an operation signal transmitted from the vehicle side when an impact is generated, and supplies gas to the inside of the airbag cushion 108. In the present embodiment, the inflator 110 is a cylinder type (cylindrical type). The inflator 110 is built in the rear side of the inside of the airbag cushion 108 with the longitudinal direction facing up and down.

Currently popular inflators are filled with a gas generator and burned to generate gas, compressed gas is filled with gas to supply gas without generating heat, or combustion. There is a hybrid type that uses both gas and compressed gas. Any type of inflator 110 can be used.

FIG. 1B is a diagram illustrating a state before the operation of the airbag cushion 108 of FIG. 1A. The airbag cushion 108 before operation is built in the backrest of the seat in a storage form such as winding or folding. Here, the airbag cushion 108 is unitized with the inflator 110, the bracket 112 described later, and the like to form the airbag module 106.

The airbag module 106 is assembled to the frame side plate portion 114 of the inner frame 104. The frame side plate portion 114 is a portion of the inner frame 104 along the left and right side surfaces of the backrest. A pair of frame side plate portions 114 are provided on the left and right sides in the vehicle width direction. In the present embodiment, the airbag module 106 is assembled to the frame side plate portion 114 on the left side in the vehicle width direction. The airbag module 106 can also be attached to the frame side plate portion on the right side in the vehicle width direction. That is, the airbag module 106 can be installed on either the side of the seat 102 on the door side (near side) near the collision point or on the side inside the vehicle (far side) far from the collision point. ..

The airbag module 106 includes a soft cover 116 that covers the airbag cushion 108 in the stored form. The soft cover 116 is made of a non-woven fabric or the like, and is wound with a bracket 112 and an airbag cushion 108 in a stored form, and is broken by the expansion pressure of the airbag cushion 108 to release the airbag cushion 108.

FIG. 2 is a diagram illustrating the airbag cushion 108 in each state of FIG. 1 from the side of the seat 102. FIG. 2A illustrates the airbag cushion 108 during operation of FIG. 1A. As illustrated in FIG. 2A, the airbag cushion 108 of the present embodiment expands and expands from the frame side plate portion 114 to the front thereof.

In the present embodiment, the bracket 112 is attached to the frame side plate portion 114 together with the airbag cushion 108 and the inflator 110. The bracket 112 is a resin member that is harder than the airbag cushion 108 and the soft cover 116 and has a certain degree of rigidity, and supports the airbag cushion 108 during expansion and deployment. The bracket 112 has a longitudinal shape along the vertical direction of the frame side plate portion 114, and supports the airbag cushion 108 from the outside in the width direction of the seat 102. The bracket 112 extends forward from the frame side plate portion 114, and is capable of widely supporting the airbag cushion 108.

FIG. 2B illustrates the airbag cushion 108 in the storage form of FIG. 1B. The airbag cushion 108 in the storage form has a vertically long shape along the bracket 112, and the soft cover 116 is wrapped around the outside.

FIG. 3 is a perspective view of the side airbag device 100 of FIG. 2 (b). FIG. 3A shows the side airbag device 100 of FIG. 2B from the upper left rear side of the seat. In the present embodiment, the airbag module 106 including the bracket 112 is attached to the center side of the frame side plate portion 114 in the width direction of the backrest.

FIG. 3B is a diagram in which the airbag module 106 is separated from the frame side plate portion 114 of FIG. 3A. Two stud bolts 118 included in the inflator 110 project from the airbag module 106. The stud bolts 118 are provided at two positions apart from each other in the longitudinal direction of the main body of the inflator 110. The inflator 110 extends through the airbag cushion 108 (see FIG. 2A) and the bracket 112 and is fastened to the frame side plate portion 114.

FIG. 4 is a diagram in which the soft cover 116 is separated from the bracket 112 of FIG. 3 (b). The soft cover 116 is a member for holding the airbag cushion 108 (see FIG. 2B) in a stored form on the bracket 112. The soft cover 116 is made of a non-woven fabric or the like, and is used by being hooked on the hook 130 of the stud bolt 118 and the bracket 112. The soft cover 116 is softer than the bracket 112 and has a certain degree of flexibility, and can be deformed according to the shape of the airbag cushion 108 and the internal shape of the seat 102 (see FIG. 1A and the like). can. The soft cover 116 is wound so as to cover the entire airbag cushion 108, but it may be configured to cover only a part of the airbag cushion 108.

The soft cover 116 has a bolt mooring hole 120 hooked on a stud bolt 118 penetrating the bracket 112, and a plurality of hook mooring holes 122 hooked on a plurality of hooks 130 provided on the bracket 112. The plurality of hook mooring holes 122 are formed side by side in a row.

The soft cover 116 has a fragile portion 117 that can be broken by the expansion pressure of the airbag cushion 108. The fragile portion 117 is a cut lined up in a broken line shape, and is provided so as to divide the soft cover 116 into two along the longitudinal direction of the bracket 112 (see FIG. 3B). The soft cover 116 can suitably open the airbag cushion 108 by breaking the fragile portion 117. The fragile portion 117 can also be realized as a configuration in which cuts arranged in a notch shape or small slits (through holes) are arranged.

As described above, the bracket 112 is a component that supports the airbag cushion 108 during expansion and deployment, which is harder than the airbag cushion 108 and the soft cover 116 and has a certain degree of rigidity. For example, the bracket 112 can be formed by using a resin as a material. The bracket 112 can be formed by containing not only resin but also metal, and any material can preferably embody a configuration having appropriate rigidity.

The bracket 112 has a base 124 to which the inflator 110 (see FIG. 2B) and the airbag cushion 108 are fixed, and a reaction force plate 126 that applies a reaction force when the airbag cushion 108 is inflated. The base portion 124 is formed in a planar shape along the frame side plate portion 114, and a through hole 128 through which the stud bolt 118 penetrates is formed. The reaction force plate 126 bends from the front side of the base 124 and extends toward the outside of the vehicle in the vehicle width direction, and further bends and extends forward. The presence of the reaction force plate 126 enables the airbag cushion 108 to push the reaction force plate 126 and efficiently expand and deploy to the front of the vehicle.

A plurality of hooks 130 for hooking the soft cover 116 are provided along the leading edge 132 at a portion outside the vehicle width direction of the reaction force plate 126 which is a portion of the bracket 112 in front of the frame side plate portion 114. There is.

The soft cover 116 utilizes the two stud bolts 118 penetrating the base 124 and the plurality of hooks 130 on the leading edge 132 of the reaction plate 126 to provide the bracket 112 and the airbag cushion 108 (FIG. 2 (b)). It is possible to easily wrap it around (see). By winding the soft cover 116, it is possible to suitably hold the storage form of the airbag cushion 108 not only while the vehicle is running but also before the airbag module 106 is assembled to the vehicle.

FIG. 5 is a cross-sectional view taken along the line AA of the airbag module 106 before the operation of FIG. 2B. As illustrated in FIG. 5, the bracket 112 is attached to the center side of the backrest 103 in the width direction with respect to the frame side plate portion 114. The main body of the inflator 110 and the airbag cushion 108 are provided on the central side with respect to the bracket 112. The stud bolt 118 penetrates the airbag cushion 108, the bracket 112, and the frame side plate portion 114 from the main body portion of the inflator 110.

The fragile portion 117 of the soft cover 116 is provided so as to be located in front of the airbag cushion 108 when the airbag module 106 is attached to the frame side plate portion 114. When the airbag cushion 108 expands and expands forward from the frame side plate portion 114, the fragile portion 117 is located in front of the airbag cushion 108, so that the fragile portion 117 can be efficiently broken.

The reaction force plate 126 of the bracket 112 extends outward from the base portion 124 across the leading edge 134 of the frame side plate portion 114 in the width direction of the backrest 103, and further bends and extends forward. As a result, when the occupant comes into contact with the airbag cushion 108, the reaction force is efficiently obtained from the reaction force plate 126 existing on the opposite side thereof, the load of the occupant is appropriately absorbed, and the occupant is more fully satisfied. Can be restrained.

The reaction force plate 126 is formed so as to mesh with the frame side plate portion 114. For example, the leading edge 134 of the frame side plate portion 114 is bent toward the center side in the width direction of the backrest 103. The reaction force plate 126 of the bracket 112 is formed with a recess 136 along the leading edge 134 of the frame side plate portion 114. The recess 136 has a shape that is once bent from the front side of the base portion 124 toward the center side in the width direction of the backrest 103, exceeds the front edge 134 of the frame side plate portion 114, and is bent outward in the width direction. The reaction force plate 126 extends outward in the width direction across the leading edge 134 of the frame side plate portion 114, and bends and extends forward from there.

The bracket 112 is in a state of being meshed with the leading edge of the frame side plate portion 114 by the recess 136. With this configuration, the bracket 112 can prevent the position shift with respect to the frame side plate portion 114, and can support the airbag cushion 108 without losing its posture when the airbag cushion 108 is expanded and deployed. Further, the reaction force plate 126 can efficiently apply reaction force from the rear and side to the expanding and deploying airbag cushion 108 by the portion extending in the vehicle width direction and the portion extending to the front of the vehicle. It has become.

As described above, according to the present embodiment, in addition to being able to suitably hold the storage form of the airbag cushion 108 by the soft cover 116, when the airbag cushion 108 restrains the occupant, the airbag cushion 108 is repelled from the bracket 112. Since it becomes easier to obtain force, the occupant restraint performance of the airbag cushion 108 can also be improved.

Although it has been explained that the soft cover 116 uses a non-woven fabric as a material, the soft cover 116 can also be realized by other materials. For example, the soft cover 116 can be realized by using the same material as the heat-welded cloth or the base cloth of the airbag cushion 108. Further, when a heat-welded cloth is used as the material, it is also possible to heat-weld the edges of a plurality of scraps to form one soft cover 116. In this case, since the edges of the airbag cushion 108 are peeled off by the expansion pressure, the edges can be used as fragile portions.

(Modification example)
FIG. 6 is a diagram illustrating a first modification (soft cover 140) of the soft cover 116 of FIG. In the following description, the components already described will be designated by the same reference numerals, and the description thereof will be omitted. Further, the components having the same names as the components already described shall have the same components and functions even if they have different reference numerals.

In the soft cover 140 illustrated in FIG. 6, the fragile portion 142 is formed in each of the narrow regions between the two hook mooring holes 122 formed adjacent to each other. The fragile portion 142 can also be broken by the expansion pressure of the airbag cushion 108 (see FIG. 5 and the like). The soft cover 160 can also suitably open the airbag cushion 108 by breaking the fragile portion 142 when the airbag cushion 108 expands.

FIG. 7 is a diagram illustrating a modified example of each of the bracket 112 and the soft cover 116 of FIG. The soft cover 200 of the second modification illustrated in FIG. 7 has a plurality of hooks 202 on the front edge side. Further, the bracket 204 has a plurality of insertion holes 206 along the leading edge 132 of the reaction force plate 126. In addition to the stud bolt 118, the soft cover 200 can be easily wound around the bracket 204 and the airbag cushion 108 by hooking a plurality of hooks 202 into the insertion holes 206 of the bracket 204.

The hook 202 of the soft cover 200 may be set to a rigidity that is harder than the main body of the soft cover 200 and softer than the bracket 204 and can be deformed by a certain force. With this configuration, the soft cover 200 can release the airbag cushion 108 by deforming the hook 202 due to the expansion pressure of the airbag cushion 108 and dropping it from the insertion hole 206.

Also in the soft cover 200, it is possible to implement the vulnerable portion 117 described for the soft cover 116. When the soft cover 200 breaks at the fragile portion 117, the airbag cushion 108 can be opened without the hook 202 falling out of the insertion hole 206 of the bracket 204.

As described above, the bracket 112 and the soft cover 200 also make it possible to suitably hold the storage form of the airbag cushion 108 not only while the vehicle is running but also before the airbag module 106 is assembled to the vehicle.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the embodiments described above are preferred examples of the present invention, and other embodiments may be implemented by various methods. Can be accomplished. Unless otherwise specified in the specification of the present application, the present invention is not limited to the shape, size, configuration arrangement, etc. of the detailed parts shown in the accompanying drawings. In addition, the expressions and terms used in the specification of the present application are for the purpose of explanation, and are not limited thereto unless there is a statement to the effect that they are particularly limited.

Therefore, it is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. It is understood that it is a thing.

The present invention can be used for an airbag device mounted on a vehicle.

100 ... Side airbag device, 102 ... Seat, 104 ... Internal frame, 106 ... Airbag module, 108 ... Airbag cushion, 110 ... Inflator, 112 ... Bracket, 114 ... Frame side plate, 116 ... Soft cover, 117 ... Vulnerable Part, 118 ... Stud bolt, 120 ... Bolt mooring hole, 122 ... Hook mooring hole, 124 ... Base, 126 ... Reaction force plate, 128 ... Through hole, 130 ... Hook, 132 ... Bracket front edge, 134 ... Frame side plate Front edge 136 ... concave, 140 ... soft cover of first modification, 142 ... fragile part of modification, 200 ... soft cover of second modification, 202 ... hook, 204 ... bracket of modification, 206 ... insertion Hole

Claims (7)

A side airbag device including a frame side plate portion along the side surface of the backrest of the internal frame of a vehicle seat and an airbag module attached to the frame side plate portion.
The airbag module is
A bracket attached to the center side of the frame side plate portion in the width direction of the backrest and extending to the front of the frame side plate portion.
An inflator fixed to the center side of the bracket,
An airbag cushion that is fixed to the center side of the bracket together with the inflator in a predetermined storage form that is wound or folded.
A soft cover in which the bracket and the airbag cushion in the storage form are wound and can be broken by the expansion pressure of the airbag cushion.
Including
The bracket is
A through hole through which the stud bolt extending from the inflator penetrates,
A plurality of hooks provided at predetermined positions in front of the frame side plate portion, and
Have,
The soft cover is
A bolt mooring hole that is hooked on the stud bolt that penetrates the bracket,
A plurality of hook mooring holes hooked on the plurality of hooks of the bracket,
A fragile part that can be broken by the expansion pressure of the airbag cushion,
Have,
The plurality of hook mooring holes are formed side by side in a row.
A side airbag device characterized in that the fragile portion of the soft cover is provided in a region between two adjacently formed hook mooring holes . The bracket is
A base along the frame side plate portion to which the inflator and the airbag cushion are fixed, and
A reaction force plate extending outward from the base portion across the front edge of the frame side plate portion in the width direction of the backrest and further bending and extending forward.
Have,
The through hole is provided in the base and is provided.
The side airbag device according to claim 1 , wherein the hook is provided on the reaction force plate. The side airbag device according to claim 1 or 2 , wherein the bracket has a predetermined rigidity that is harder than that of the airbag cushion and the soft cover. A side airbag device including a frame side plate portion along the side surface of the backrest of the internal frame of a vehicle seat and an airbag module attached to the frame side plate portion.
The airbag module is
A bracket attached to the center side of the frame side plate portion in the width direction of the backrest and extending to the front of the frame side plate portion.
An inflator fixed to the center side of the bracket,
An airbag cushion that is fixed to the center side of the bracket together with the inflator in a predetermined storage form that is wound or folded.
A soft cover around the bracket and the airbag cushion in the storage form, and
Including
The bracket is
A through hole through which the stud bolt extending from the inflator penetrates,
A predetermined insertion hole provided at a position in front of the frame side plate portion, and
Have,
The soft cover is
A bolt mooring hole that is hooked on the stud bolt that penetrates the bracket,
A hook hooked on the insertion hole of the bracket,
Have,
The soft cover is a side airbag device characterized in that the hook is deformed by receiving the expansion pressure of the airbag cushion and falls off from the insertion hole of the bracket . The side airbag device according to claim 4 , wherein the soft cover has a fragile portion that can be broken by the expansion pressure of the airbag cushion. The bracket is
A base along the frame side plate portion to which the inflator and the airbag cushion are fixed, and
A reaction force plate extending outward from the base portion across the front edge of the frame side plate portion in the width direction of the backrest and further bending and extending forward.
Have,
The through hole is provided in the base and is provided.
The side airbag device according to claim 4 or 5 , wherein the insertion hole is provided in the reaction force plate. The side according to any one of claims 4 to 6 , wherein the hook has a predetermined rigidity which is harder than the soft cover main body which does not include the hook and softer than the bracket among the soft covers. Airbag device.

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