JPH10129385A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and firmly mount a cover body on a base plate and to reduce the manufacturing cost of an air bag device. SOLUTION: An air bag 15, an inflator 16, and a cover body 12 are attached to a base plate 11 to form an air bag device 1. A square tubular mounting part 52 is formed at a cover body 12. A plurality of lock holes 55 are opened to the mounting piece part 52. An engaging rib 58 is protruded inside the mounting piece part 52. A square tubular inner plate part 26 fitted in the inside of the mounting piece part 52, and a plurality of outer plate parts 31, 32, and 33 fitted in the outside of the mounting piece part 52 are integrally formed at the base plate 11. A slot 37 is opened to the inner plate part 26. A lock part 41 is integrally cut and rises on the first outer plate part 31. When each lock part 41 is caulked in a direction in which the lock part is spaced away from the slot 37, a tension is exerted on the mounting piece part 52, an engaging rib 58 is pressed against the slot 37 side and firmly engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device in which an inflating and deploying airbag is covered with a cover.

[0002]

2. Description of the Related Art Conventionally, for example, an airbag device provided in a boss portion of a steering wheel or the like to protect a driver of an automobile from a collision impact or the like is known. The airbag device includes an inflator that injects gas, a bag-shaped airbag folded and stored, a cover body that covers the airbag, and the inflator, the airbag, and the cover body. And a base plate. Then, when detecting the collision of the vehicle, that is, when detecting a sudden deceleration of the vehicle or more, the airbag device rapidly injects gas from the inflator to inflate and deploy the airbag,
The cover body is broken by a predetermined tear line by the pressure of the inflation and is deployed in a door shape, and the airbag is projected from the cover body and inflated and deployed in front of the occupant.

[0003] In addition, for example, in the cover body,
As shown in JP-A-53323, a covering portion for covering the folded airbag and a mounting piece projecting from the covering portion are formed, and the mounting piece is formed by using a large number of rivets or the like. It is fixed to a support piece formed around the base plate.

However, such a configuration in which a large number of rivets are used for fixing the cover body has a problem that the number of parts increases, the assembling process becomes complicated, and it is difficult to reduce the manufacturing cost.

Also, for example, a configuration described in Japanese Patent Application Laid-Open No. 7-14596 is known. In this configuration, a ridge or a plurality of holes are formed in the mounting piece of the cover body, and the supporting piece of the base plate is deformed so that the mounting piece is sandwiched and caulked, so that the base plate is formed. The cover body is fixed.

However, in such a configuration in which the mounting piece of the cover body is sandwiched and fixed only by deformation of the support piece, for example, the ridge is engaged over the entire length of the mounting piece of the cover body, and Work steps such as deforming and caulking over the entire length of the support piece are required, and the mold structure for manufacturing the cover body is complicated, or the steps such as caulking are complicated, and the manufacturing cost is increased. Have a problem.

[0007]

As described above, the configuration using a large number of rivets for fixing the cover body increases the number of parts, complicates the assembly process, and makes it difficult to reduce the manufacturing cost. Have. Further, in the configuration in which the mounting piece of the cover is sandwiched and fixed only by deformation of the support piece, in order to firmly fix the cover, the ridge is engaged over the entire length of the mounting piece of the cover, and In addition, a work process such as deforming and caulking over the entire length of the support piece is required, so that the mold structure for manufacturing the cover body becomes complicated, or the process such as caulking becomes complicated, so that the manufacturing cost is increased. Have the problem of rising.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an airbag apparatus to which a cover can be firmly and easily attached.

[0009]

According to a first aspect of the present invention, there is provided an airbag apparatus comprising: a support member; an airbag which is inflated and deployed by inflow of gas; and a cover body which covers the airbag and is held by the support member. The cover body is provided with a mounting piece that fits into a support portion provided on the support member from a first direction. The mounting piece portion has an engagement receiving portion provided on the support portion. An engaging portion engaging in a second direction intersecting the first direction and a lock receiving portion locked by a locking portion provided on the support portion are provided, and the locking portion includes: It is formed by applying a force along the second direction to the engaging portion and plastically deforming in a third direction for holding the engaging portion engaged with the engaging receiving portion.

In this configuration, the cover body normally covers the airbag, and when the airbag device is activated,
The airbag is inflated and deployed to break the covering portion of the cover body, and the airbag projects. The mounting piece of the cover fits into the support of the support member, engages the engagement portion with the engagement receiving portion, and plastically deforms the locking portion to lock the locking receiving portion. By doing so, it is easily held. In addition, in a state where the engaging portion is plastically deformed, a force is applied to the engaging portion and the engaging portion is held in the engaged state, so that the cover body is firmly held. Further, the number of fixing members such as rivets can be reduced or omitted, and the manufacturing cost can be reduced by simplifying the structure and reducing the number of parts.

According to a second aspect of the present invention, in the airbag apparatus of the first aspect, the locking portions are provided on both sides of the engagement receiving portion, and are separated from each other.
, And a tension is applied to the mounting piece, a force along the second direction is applied to the engaging portion, and the engaging portion is held in the engaged state.

In this configuration, with a simple configuration, the locking portion is locked to the locking receiving portion, the engaging portion is securely engaged with the engaging receiving portion, and the cover body is firmly attached to the support member. Is held.

According to a third aspect of the present invention, there is provided the airbag device according to the first or second aspect, wherein the engaging portion is provided with a hook portion extending in a third direction.

In this configuration, when the locking portion is plastically deformed in the third direction and locked to the locking receiving portion, the mounting piece is pushed by the locking portion and the engaging portion is moved to the third position. Move in the direction of
The hook engages with the support, and the cover body is firmly held by the support.

According to a fourth aspect of the present invention, in the airbag device according to any one of the first to third aspects, the support portion includes an inner support portion provided along an inner side surface of the mounting piece portion, and the mounting portion. And an outer supporting portion provided along the outer surface of the one portion.

In this configuration, the mounting piece of the cover body is easily and firmly held by being sandwiched between the inner support portion and the outer support portion of the support portion.

According to a fifth aspect of the present invention, there is provided the airbag device according to the fourth aspect, wherein one of the inner support portion and the outer support portion is provided with an opening facing the engagement receiving portion. It is a thing.

In this configuration, when the mounting piece of the cover body is fitted to the support of the support member and the engagement is engaged with the engagement receiving part, the engagement part is formed through the opening. It is easy to elastically deform in the direction in which the airbag device flies away from the engagement receiving portion, and the airbag device is easily manufactured.

According to a sixth aspect of the present invention, in the airbag device according to any one of the first to fifth aspects, the locking portion is plastically deformed in a third direction intersecting the first direction. A pusher is provided for pushing the pusher receiving portion provided on the cover body in the first direction in the state of being plastically deformed in the third direction.

In this configuration, when the locking portion is plastically deformed in the third direction and locked to the locking receiving portion, the mounting piece is pressed against the locking portion along the first direction. Thus, the cover body is easily and firmly held at a predetermined position of the support member.

According to a seventh aspect of the present invention, in the airbag device according to the sixth aspect, at least one of the pushing portion and the pushing receiving portion is provided with an inclined surface.

In this configuration, by providing the inclined surface, a configuration in which the attaching piece is pushed in the first direction by the locking portion that moves in the third direction is realized with a simple structure.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the airbag device of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an airbag device, which is provided on a steering wheel of an automobile. Although not shown, the steering wheel includes a steering wheel main body and an airbag device 1 mounted on the occupant side, that is, the front side of the steering wheel main body. The steering wheel is attached to a steering shaft that is tilted so that it can be adjusted appropriately, and is normally used in a tilted state. Hereinafter, the occupant side on which the airbag device 1 is mounted is referred to as an upper side or a front side, and The side is described as the lower side or the back side. Further, the steering wheel body includes an annular rim portion, a boss portion located inside the rim portion, and a plurality of, in this embodiment, three spoke portions connecting the rim portion and the boss portion. And so on. A boss fitted to the steering shaft and a boss plate separately or integrally fixed to the boss are provided below the boss portion. The boss plate is connected to the boss plate via a horn switch mechanism (not shown) or the like. The airbag device 1 is attached. Furthermore, the lower side of this boss is
Covered by lower cover.

The airbag device 1 includes a base plate 11 as a support member, a cover (airbag cover) 12 attached to the base plate 11, an airbag 15, an inflator 16, a retainer 17, and the like. I have.

As shown in FIGS. 1 and 2, the base plate 11 has a substantially symmetrical shape, and is formed by pressing a metal plate into a substantially octagonal shape (substantially diamond shape).
(A flat plate portion) 21 and a peripheral plate portion 22 as a support portion bent downward from the outer peripheral portion of the substrate portion 21 to form a substantially box shape. In addition, a circular hole-shaped inflator through-hole 23 is formed substantially in the center of the substrate portion 21, and a plurality of bolt through-holes 24 are formed around the inflator through-hole 23. Have been.

Further, the peripheral plate portion 22 is a rectangular cylindrical inner plate as an inner supporting portion (first side wall) which is continuous with the peripheral portion of the substrate portion 21 and is bent downward in a direction intersecting with the peripheral portion. Part 26,
An extending portion 27 extending radially outward from a predetermined position of the inner plate portion 26; and an outer supporting portion (second side wall) extending upward from an outer end of the extending portion 27. ) 28. Further, the outer support portion 28 has a side opening 29 formed in a portion facing a part of both surfaces of the inner plate portion 26, and an opening portion 30 formed in a portion facing the front and rear surfaces of the inner plate portion 26. In addition to the above, first portions which are formed in a substantially rectangular flat plate shape and are provided in pairs on both sides at portions facing the respective surfaces of the inner plate portion 26 are provided.
Or third outer plate portions 31, 32, 33 are formed. Then, the inner plate portion 26, the extension portion 27, and the outer plate portions 31, 3
A portion surrounded by 2 and 33 is an insertion portion 34 having a U-shaped cross section with an open upper side.

The inner plate portion 26 is provided with a pair of bracket portions (mounting pieces) 35 on both sides located at a portion facing the side opening portion 29, and has a through hole formed in the bracket portion 35. A square nut 36 fixed to the inside by caulking or the like is attached to a boss plate or the like serving as an attachment member of the steering wheel body by a pair of bolts (not shown) on both sides.

Further, slots 37 are formed in front and rear surfaces of the inner plate portion 26 facing the opening portion 30 as engagement receiving portions each having a rectangular long hole shape.

As shown in FIGS. 4 and 5, etc., the extending portion 27 is formed with a positioning hole 38 penetrating vertically at a predetermined position along the circumferential direction, that is, the longitudinal direction. If necessary, a hole is formed in the vicinity of the third outer plate portion 33 to bend the outer support portion 28 and the like.

Further, as shown in FIGS. 1 and 2, each of the outer plate portions 31, 32, 33 of the outer support portion 28 has a first outer plate portion 31.
The locking portions (caulking engagement pieces) 41 are integrally formed at two locations, and at one location on each of the second and third outer plate portions 32 and 33. A guide portion 42 that is inclined upward and outward is integrally formed along the line. Further, as shown in FIG. 2 and the like, each locking portion 41
1, 32, and 33 are cut out in a substantially C-shape, and a locking piece (vertical portion) 44 that is vertically arranged to be continuous with the first outer plate portion 31 through a vertical folding line A; A lower portion of the locking piece 44 is formed with a contact portion (cut-and-raised portion) 45 as a pushing portion bent outward at the folding line B.

Each folding line A is connected to the adjacent slot 37.
It is provided on the side separated from the. Also, each folding line B
Is formed so as to be inclined downward in the direction of the folding line A, and further, the contact portion 45 is formed to be inclined so as to slightly descend from the folding line B which is the base end portion toward the distal end side. ing.

A rectangular opposing hole 47 is formed in the inner plate portion 26 so as to oppose the locking portion 41.

On the other hand, as shown in FIGS. 1 and 3, the cover body 12 has an outer shape as a center pad combined with a steering wheel body having three spokes, and is elastically deformable. A covering portion 51 integrally formed of synthetic resin and covering a part of the surface side of the boss portion and the spoke portion of the steering wheel body;
And a cylindrical mounting piece (peripheral wall) 52 projecting vertically downward from the lower surface of the main body. The portion enclosed between the covering portion 51 and the inside of the mounting piece portion 52 is a storage space for storing the airbag 15 and faces the storage space for the airbag 15 to cover the airbag 15. On the lower surface of the portion 51, a fragile tear line 53 having a substantially H-shape in a plan view is formed to be concave and thin.

The mounting piece 52 of the cover 12 has a substantially octagonal cylindrical shape whose inner surface substantially matches the outer shape of the substrate 21 of the base plate 11, and the thickness of the mounting piece 52 is The distance between the inner plate portion 26 of the base plate 11 and the first outer plate portion 31 substantially coincides with each other.
52 is fitted on the outside of the substrate portion 21 of the base plate 11, and is inserted and fitted from above into the insertion portion 34 formed by the peripheral plate portion 22.

The mounting piece 52 is formed with a rectangular locking hole 55 as a locking receiving part corresponding to the position of each locking part 41 of the base plate 11, and corresponds to the bracket part 35. The bracket notch 56 is formed, and positioning protrusions 57 to be inserted into the positioning holes 38 are formed at a plurality of positions at the lower end. In each locking hole 55, as shown in FIG. 4 and the like, a push receiving portion 55a is formed on the lower surface portion so as to be inclined so as to descend toward the outer peripheral side.

Further, as shown in FIG. 3 and the like, from the inner surfaces of the front and rear portions of the mounting piece portion 52, engaging ribs (convex portions) 58 as engaging portions correspond to the positions of the slots 37. It protrudes integrally toward the inside. Then, each engagement rib 58
Is formed in a substantially trapezoidal cross section with an inclined lower surface.

Further, as shown in FIG.
For example, two base cloths are sewn together and formed into a flat bag shape. A gas inlet 15a having a circular hole shape is formed at the bottom of the center, and a bolt is formed around the gas inlet 15a. A plurality of through holes 15b are formed.

Further, the inflator 16 includes a substantially cylindrical main body 16a, and a flange 16b is protruded from an outer peripheral portion of the main body 16a. And this flange part 16
b, a plurality of gas injection ports 16c for injecting gas into the main body 16a, and
A plurality of bolt holes 16d are formed in 16b.

The retainer 17 has an annular retainer body 17a, and four mounting bolts 60 are fixed to the retainer body 17a downward.

Next, the steps of assembling the airbag device 1 of the present embodiment will be described.

First, the gas inlet 15a of the airbag 15 is deformed into an elliptical shape.
The retainer 17 is inserted into the inside of the base plate 15, the mounting bolts 60 are pulled out from the bolt through holes 15b, and these mounting bolts 60 are inserted into the bolt through holes 24 of the base plate 11 from above, so that the gas flow The periphery of the entrance 15 a is pressed onto the substrate 21 of the base plate 11. In this state, the airbag 15 is folded small so as to fit within the outer shape of the substrate portion 21 of the base plate 11.

Further, as shown in FIGS. 1, 2 and 4, the base plate 11 is formed by bending the folding line B to form the contact portion 45.
And the fold line A is not bent, and the locking piece 44 is pressed with the first outer plate 31 flush. Then, from this state, the airbag 15 is pushed downward by covering the airbag 15 with the cover body 12 so as to wrap the airbag 15 from above the base plate 11 which is arranged in a folded manner and laid on the base plate 11 in the vertical direction as the first direction. The airbag 15 is stored between the body 12 and the mounting piece 52 is fitted to the outer peripheral portion of the substrate 21. At this time, the mounting piece 52
It is inserted into the insertion portion 34, is sandwiched between the inner plate portion 26 and the first outer plate portion 31, and a positioning protrusion 57 formed at the lower end of the mounting piece portion 52 is inserted into the positioning hole 38 of the base plate 11. After being inserted and the mounting piece 52 is once deformed toward the opening 30, the engaging rib 58 projects toward the inward F2 along the radial direction as the second direction and engages with the slot 37. The cover body 12 is positioned and held.

Then, the sub-assembly body of the airbag module temporarily assembled in this manner is mounted on a caulking machine (not shown), and each locking portion 41 is pressed in the direction of the inner plate portion 26, that is, inwardly F2, thereby plastically deforming. Let it. Then, as shown in FIGS. 1, 5, 6, etc., each locking portion 41 is bent at about 90 degrees at the folding line A, while the locking holes 55 of the cover body 12 and the inner plate portion 26 are formed. Projecting inside the inner plate portion 26 through the opposing hole 47,
That is, the plurality of locking portions 41 of the base plate 11 lock the locking holes 55 of the mounting piece 52 of the cover body 12 to prevent the cover body 12 from moving upward, and
Hold firmly.

The contact part 45 of the locking part 41 and the locking hole 55
The pressing portion 55a is formed to be inclined, so that in the process of pressing each locking portion 41 inwardly F2 and plastically deforming (plastic deformation stroke), the contact portion 45 becomes the pressing receiving portion. While being in sliding contact with 55a, the push receiving portion 55a is pushed downward F1 to push down the cover body 12 downward F1 against the restoring force of the folded airbag 15 and extend the lower end of the mounting piece 22. In a state of being pressed onto the setting portion 27, the positioning and holding are performed at a predetermined height position without rattling.

Further, when each locking portion 41 is pressed inwardly F2 to be plastically deformed, each locking portion 41 is bent at about 90 degrees at the folding line A and at the same time each folding line A Is slot 37
The locking piece 44 of each locking portion 41 is directed along the circumferential direction of the base plate 11 as the third direction and in the direction away from the slot 37 because the locking piece 44 is formed on the side remote from the slot 37. Moves in the predetermined direction F3, and
3 is pushed toward the side surface 55b of the locking hole 55 of the mounting piece 52. At this time, the locking portions 41 are arranged symmetrically on both sides with the slot 37 interposed therebetween, and each fold line A is formed on the side separated from the slot 37, so that it engages with the slot 37. At the portion where the engagement rib 58 is formed, the mounting piece 52
Tension. Then, the mounting piece 52 is attached to the inner plate 26.
Are arranged in a substantially arcuate shape on the outer peripheral side, so that the inner F2, that is, the engaging rib 58 is pressed in the direction in which the slot 37 is engaged and held.

Subsequently, the upper part of the main body 16a of the inflator 16 is pushed into the inflator through hole 23 and the gas inlet 15a from below the base plate 11, and the flange 16b is formed.
By inserting the mounting bolt 60 of the retainer 17 into the bolt through hole 16d of the bolt, and screwing and tightening the nut 62 from below the mounting bolt 60, the base plate is inserted between the retainer body 17a and the flange portion 16b. 11 and the airbag 15 are fastened together, and the airbag device 1 is assembled.

When an impact such as a collision is applied to the automobile, a control unit (not shown) activates the inflator 16 and rapidly supplies an inert gas such as nitrogen gas into the air bag 15 from the gas injection port 16c. Then, the gas inflates and deploys the airbag 15 rapidly, and the pressure of this inflation causes the covering portion 51 of the cover body 12 to break along the tear line 53 and protrude above the cover body 12. Further, the airbag 15 is inflated and deployed widely in front of the occupant to absorb and reduce the impact applied to the occupant.

As described above, according to the present embodiment, the mounting piece 52 of the cover body 12 is fitted to the peripheral plate 22 having a U-shaped cross section of the base plate, and the engaging rib 58 is fitted to the slot 37.
And furthermore, the locking portion 41 is plastically deformed and locked in the locking hole 55, so that the cover body 12 can be easily attached to the base plate and firmly and reliably before and after the inflation of the airbag 15. Can be attached and held.

In a state where each locking portion 41 is plastically deformed,
A downward force is applied to the mounting piece 52 of the cover body 12 so that the cover body 12 can be held at a predetermined position without rattling.

At the same time, in a state where each locking portion 41 is plastically deformed, tension is applied to the mounting piece portion 52 of the cover body 12 so that the engaging rib 58
The cover body 12 can be firmly held because it can be held in a state of being engaged with the slot 37 by applying an inward force to the cover body.

Further, as described above, the cover body 12 can be firmly held, and the locking portions 41 and the locking portions 41
Since the outer plate portions 31, 32, 33 provided with are formed integrally with the base plate, the number of fixing members such as rivets can be reduced or omitted, simplifying the structure and the manufacturing process, and reducing the number of parts. As a result, manufacturing costs can be reduced.

Since the base plate 11 is formed by pressing the inner plate 26 and the first outer plate 31 and the like integrally with the substrate 21, the number of parts is reduced, the structure is simplified, and the manufacturing cost is reduced. be able to.

In addition, in addition to the above configuration, for example, as shown in FIG.
a, and the hooks 58a are attached to the side edges of the slot 37 in a state where the engaging ribs 58, which are tensioned in the predetermined direction F3 on the locking portions 41, are deformed or moved in the predetermined direction F3. The engagement rib 58 can be prevented from coming off in the opposite direction of the inward F2. That is, the hook 58
a is an inclined surface whose inner peripheral side protrudes sideward. The engaging rib 58 provided with the hook portion 58a is used for forming the undercut of the upper portion (the cover portion 51 side) in the form of a slide piece. Release with
The lower side portion is easily released in the vertical direction. Then, in a state where no tension is applied by the locking portion 41, as shown by a solid line in FIG. 7, the side edge of the hook portion 58a does not protrude laterally from the side edge of the slot 37, and the cover body 12 is When assembling with the base plate 11, the engaging rib 58 can be easily inserted into the slot 37, and the mounting piece 41
When the tension acts on the hooks 58a, the hooks 58a are more largely engaged with the slots 37, so that the engagement strength of the portions where the outer plates 31, 32, and 33 are not formed can be increased.

In each of the above embodiments, the cover member
The mounting plate portion 52 of 12 and the peripheral plate portion 22 of the base plate 11 each have a rectangular tube shape, and the inner plate portion 26 and the outer plate portions 31, 32,
Each of the reference numerals 33 has a substantially planar shape. However, for example, the inner plate portion and the outer plate portion may each be formed in a curved surface, and the mounting piece of the cover body may be formed in a substantially cylindrical shape.

The airbag device is not applied only to the steering wheel of an automobile. For example, an airbag device for an occupant in a passenger seat provided in an instrument panel core in front of a passenger seat, or provided in a seat or a door. The present invention can be applied to an airbag device, and further to an object requiring protection from impact, such as a moving body other than a vehicle such as an automobile.

[0057]

According to the airbag device of the first aspect, the mounting piece of the cover is fitted to the support of the support member to engage the engagement portion with the engagement receiving portion. The locking portion can be easily held by being plastically deformed and locked to the locking receiving portion. Further, in a state where the engaging portion is plastically deformed, a force is applied to the engaging portion and the engaging portion is held in an engaged state, so that the cover body can be firmly held. Further, the number of fixing members such as rivets can be reduced or omitted, and the structure can be simplified, the number of parts can be reduced, and the manufacturing cost can be reduced.

According to the airbag device of the second aspect,
In addition to the effects of claim 1, the locking portion is provided on both sides of the engagement receiving portion, and is plastically deformed in a third direction away from each other, so that the locking portion is moved to the locking receiving portion. In addition to locking, the tension can be applied to the mounting piece to maintain the engagement portion securely engaged with the engagement receiving portion, and the cover body can be firmly held by the support member, and can be simplified. By configuring, the manufacturing cost can be reduced.

According to the airbag device of the third aspect,
In addition to the effect according to claim 1 or 2, since the hook portion is provided in the engaging portion in the third direction, the locking portion is plastically deformed in the third direction and locked to the locking receiving portion. Then, when the mounting piece is pushed by the locking part and the engaging part moves in the third direction, the hook part is engaged with the supporting part, and the cover body can be firmly held by the supporting member.

According to the airbag device of the fourth aspect,
In addition to the effects of any one of claims 1 to 3, the support portion includes an inner support portion provided along an inner surface of the mounting piece portion and an outer support portion provided along an outer surface of the mounting piece portion. Therefore, the mounting piece of the cover body can be easily and firmly held between the inner support and the outer support of the support.

According to the airbag device of the fifth aspect,
In addition to the effect of the fourth aspect, since the opening is provided in one of the inner support portion and the outer support portion so as to face the engagement receiving portion, the mounting piece of the cover body is fitted to the support portion of the support member. When the engagement portion is engaged with the engagement receiving portion, the engaging portion can be easily and elastically deformed in a direction to be disengaged from the engagement receiving portion via the opening. Manufacturing can be facilitated and manufacturing costs can be reduced.

According to the airbag device of the sixth aspect,
In addition to the effect of any one of claims 1 to 5, when the locking portion is plastically deformed in the third direction and locked to the locking receiving portion,
The attaching piece can be pushed along the first direction by the pushing portion provided on the locking portion, and the cover body can be easily and firmly held at the predetermined position of the support member.

According to the airbag device of the seventh aspect,
In addition to the effect of the sixth aspect, by providing an inclined surface on at least one of the pressing portion and the pressing receiving portion, the mounting portion is pressed in the first direction by the locking portion moving in the third direction. The moving configuration can be realized with a simple structure, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an airbag device of the present invention.

FIG. 2 is a perspective view of a base plate of the airbag device.

FIG. 3 is a perspective view of the cover body of the airbag device as viewed from the back side.

FIG. 4 is an exploded perspective view showing a part of a cover body and a base plate of the airbag device.

FIG. 5 is a partial cross-sectional view showing a state where the cover body and the base plate of the airbag device are combined.

FIG. 6 is a partial cross-sectional view showing a state where the cover body and the base plate of the airbag device are combined.

FIG. 7 is a partial cross-sectional view showing another embodiment of the airbag device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airbag apparatus 11 Base plate as a support member 12 Cover body 15 Airbag 22 Peripheral plate part as a support part 26 Inner plate part as an inside support part 28 Outer support part 30 Opening 37 Slot as an engagement receiving part 41 Stop part 45 Abutment part as pushing part 52 Attaching piece part 55 Locking hole as locking receiving part 55a Pushing receiving part 58 Engaging rib as engaging part 58a Hook part F1 Downward as the first direction F2 Inward as the second direction F3 Predetermined direction as the third direction

Claims (7)

[Claims] 1. A support member, an airbag that is inflated and deployed by inflow of gas, and a cover body that covers the airbag and is held by the support member, wherein the cover body is provided on the support member. 1st on support
A mounting piece is provided that fits from the direction described above, and the mounting piece engages with an engagement receiving portion provided on the support in a second direction that intersects the first direction. When,
A lock receiving portion that is locked to a locking portion provided on the support portion, wherein the locking portion applies a force along the second direction to the engaging portion and applies a force to the engagement receiving portion. An airbag device formed by plastically deforming in a third direction for maintaining the engaged state. 2. The locking portion is provided on both sides of the engagement receiving portion, is plastically deformed in the third direction apart from each other, applies tension to the mounting piece portion, and applies a tension to the engagement portion. The airbag device according to claim 1, wherein a force is applied along the second direction to hold the engagement state with the engagement receiving portion. 3. The airbag device according to claim 1, wherein the engaging portion is provided with a hook portion extending in a third direction. 4. The support portion includes an inner support portion provided along an inner surface of the mounting piece portion, and an outer support portion provided along an outer surface of the mounting piece portion. The airbag device according to any one of claims 1 to 3, wherein 5. The airbag device according to claim 4, wherein one of the inner support portion and the outer support portion has an opening facing the engagement receiving portion. 6. The push receiving portion provided on the cover body in a state in which the locking portion is plastically deformed in a third direction intersecting the first direction and is plastically deformed in the third direction. The airbag device according to any one of claims 1 to 5, further comprising a pushing portion that pushes the airbag along the first direction. 7. The airbag device according to claim 6, wherein at least one of the pushing portion and the pushing receiving portion is provided with an inclined surface.