JP3496735B2 - Airbag device and airbag used in the device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag device for protecting an occupant in a vehicle collision and an air bag used in the device, and more particularly to an air bag device which is easily attached to a housing and an air bag used in the device. Regarding

[0002]

2. Description of the Related Art Conventionally, as an airbag device, for example,
The one described in Japanese Examined Patent Publication No. 6-39244 is provided. This is a housing for accommodating a folded airbag and an inflator, having a plurality of notches for an airbag retainer, a plurality of lid body holding grooves, a plurality of side plate mounting screw grooves, and the like. The assembling work was complicated. On the other hand, JP-A-6-219
The one disclosed in Japanese Patent No. 229 improves the assembling performance by reducing the fastening process such as bolts when attaching the airbag to the airbag device. That is, in this product, a pair of side edges facing each other of the rectangular opening of the airbag has a thickness, and the side edges are retained (retainer).
The air bag is attached to the retainer by inserting the retainer into the retaining groove and the retainer is inserted into the concave groove of the housing to be attached.

[0003]

However, in the one disclosed in the above-mentioned JP-A-6-219229,
Special processing (formation of a hem containing a core material) is required in order to make the opening side edge of the airbag thick. However, since the airbag itself is flexible, it is difficult to insert the side edge of the opening portion of the airbag into the locking groove of the retainer even if the core material is inserted. In order to simplify this work, it is necessary to make a gap in the insertion portion large, and if the gap is made large, there is a backlash in the device itself, and the airbag tends to come off.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide an air bag device which facilitates the work of assembling the air bag and an air bag used in the air bag device. It is intended to provide a bag.

[0005]

In order to achieve the above object, an airbag device according to the present invention comprises a housing having an opening opening to the vehicle compartment side and having insertion holes formed on both sides thereof.
An inflator housed in the housing and a lid body fitted into the housing and having insertion holes formed on both sides thereof are provided, and the inflator is inserted and fixed in the insertion holes of the housing and the lid body. Further, a housing having an opening opening to the vehicle compartment side and having insertion holes formed on both sides, a fixed plate having a U-shaped cross section having insertion holes formed on a pair of mounting pieces, and a peripheral portion of the opening are formed. An airbag mounted on the fixed plate by inserting the mounting pieces into the pair of slits and an inflator housed in the housing are provided, and the inflator is inserted and fixed in the insertion holes of the housing and the fixed plate. is there. Further, a housing having an opening opening to the passenger compartment side and having insertion holes formed on both sides, a fixed plate having a U-shaped cross section having insertion holes formed on a pair of mounting pieces, and an opening peripheral portion are formed. An air bag that is attached to the fixed plate by inserting the attachment pieces through the pair of slits, an inflator that is housed in the housing, and a lid body that is fitted into the housing and has insertion holes formed on both sides thereof. The inflator is inserted and fixed in the insertion holes of the fixing plate and the lid. Further, bent pieces are formed on the fixed plate toward the top plate and the bottom plate of the housing. Further, the collar piece is formed on the housing, and the overhanging piece is formed on the fixing plate so as to face the collar piece.

The airbag used in the airbag device is an airbag which is attached to a fixed plate by inserting a mounting piece into a pair of slits formed in the peripheral edge of the opening, and a reinforcing cloth is attached to the peripheral edge of the opening. Intervene,
The reinforcing cloth is sewn by providing an annular inner sewn portion at least at one place between the opening and the slit and providing an annular outer sewn portion at the outside of the slit.

[0007]

In the present invention, by inserting the inflator into the insertion hole of the housing and the lid, the housing, the lid and the inflator can be integrally attached, and the airbag device can be easily assembled. .
Further, the fixing plate and the airbag can be positioned simply by inserting the attachment piece into the slit formed in the peripheral edge portion of the opening. Furthermore, by inserting the inflator into the insertion hole of the housing and the fixing plate, the housing, the fixing plate and the inflator can be integrally attached, and the airbag device can be easily assembled.
Further, by inserting the inflator into the insertion holes of the housing, the fixing plate and the lid, the housing, the fixing plate, the lid and the inflator can be integrally attached, and the airbag device can be easily assembled. . When the bent pieces are formed on the fixed plate toward the top plate and the bottom plate of the housing, the opening peripheral edge portion of the airbag is sandwiched between the bent piece and the housing, so that the mounting strength of the airbag can be enhanced. it can. In addition, when the flange piece is formed on the housing and the protruding piece is formed on the fixing plate so as to face the flange piece, the opening peripheral edge portion of the airbag is sandwiched between the protruding piece and the flange piece. The mounting strength can be increased.

When the reinforcing cloth is sewn to the airbag, at least one annular inner sewn portion is provided between the opening and the slit, and at least one annular outer sewn portion is provided outside the slit. It is possible to prevent the airbag from being damaged.

[0009]

EXAMPLES Examples will be described with reference to the drawings. 1 is a front view of an airbag device according to the present invention, and FIG. 2 is FIG.
3 is a sectional view taken along line AA of FIG. 3, and FIG. 3 is a sectional view taken along line BB of FIG.

Reference numeral 10 denotes an inflator 3 having a cylindrical shape.
It is a housing that stores 0. The housing 10 is arranged inside the steering wheel when it is mounted for the driver's seat, and inside the instrument panel when it is mounted for the passenger's seat, and is fixed via a bracket.

The housing 10 is in the shape of a hollow box having an opening 11 formed on the side facing the occupant (the vehicle compartment side). The opening 11 is closed by a lid 20. Insert holes 13 for inserting and fixing the inflator 30 are formed in both side plates 12, 12 of the housing 10.

The lid 20 is a folded airbag 40.
A lid main body 21 in the shape of a hollow box for accommodating the passenger compartment and a lid plate 22 for closing the side facing the occupant (the passenger compartment side). Lid body 21
Has a size such that the housing 10 can be fitted into the housing 11 from the opening 11 side in a close-fitting manner. And the lid 20 is
The housing 10 is provided with fastening means such as rivets and bolts.
May be attached to.

Insertion holes 24 for inserting and fixing the inflator 30 are formed in the side walls 23, 23 of the lid main body 21 at positions corresponding to the insertion holes 13 of the housing 10.

A desired portion of the lid body 20, in the illustrated embodiment, a lid plate 22 in a portion connected to the lower surface wall 25 of the lid body 21, and a lid plate 22 in a portion connected to the side walls 23, 23, When the inflator 30 is actuated, the lid 20 is easily broken, and the airbag 40 is quickly inflated and deployed so that the groove-like fragile portion 26 is formed with a thin wall thickness.

In this embodiment, the inflator 20 is of a hybrid type using compressed gas containing argon as a main component. Reference numeral 31 is a flange provided at one end of the inflator 30. A spiral groove 32 is formed on the peripheral wall of the other end of the inflator 30.

Then, the inflator 30 is inserted into the insertion holes 24, 13, 13, 24 of the lid 20 and the housing 10, and the flange 31 is brought into contact with the side wall 23.
By fastening the tip end protruding from the insertion hole 24 with the fixing nut 33, the lid 20 and the housing 10 are attached. As described above, the housing 10, the lid 20, and the inflator 30 can be easily attached at one place.

The air bag 40 is formed with an opening 41 into which the gas ejected from the inflator 30 flows. Further, a pair of slits 43, 43 are formed in the opening peripheral edge portion 42 of the airbag 40 sandwiching the opening 41. These slits 43, 43 are formed at portions corresponding to mounting pieces 52, 52 of the fixed plate 50 described later.

As shown in FIGS. 12 and 13, a reinforcing cloth 44 made of the same material as the airbag 40 may be sewn to the opening peripheral portion 42 of the airbag 40. The reinforcing cloth 44 may be composed of a plurality of sheets. The reinforcing cloth 44 also has openings 41 and slits 43, 43 of the airbag 40.
Corresponding to, an opening 45 and a slit (not shown) are formed.

When the reinforcing cloth 44 is sewn to the peripheral edge portion 42 of the opening, the opening 4 is reinforced to reinforce the slits 43, 43.
1, 45 and the slits 43, 43 are provided with an inner sewn portion 46 in an annular shape at least at one place, and the slit 4
Outside at least one place on the outside of 3, 43, the outer side sewing portion 4 is annularly formed.
7 is preferably provided.

Reference numeral 50 is a fixing plate for mounting the folded airbag 40 in a storage space S formed by the housing 10 and the lid 20. The fixed plate 50 has a U-shaped cross section, and has a plate body 51 and
The plate main body 51 has a pair of mounting pieces 52, which are bent from both ends in the same direction.

The plate body 51 is formed to have a vertical length substantially the same as the distance between the top plate 14 and the bottom plate 15 of the housing 10. The horizontal length of the plate body 51 is the housing 1
It is formed to be slightly smaller than the distance between the both side plates 12 of 0. Then, the fixing plate 50 has the two mounting pieces 52, 52.
Is configured so that it can be fitted into the housing 10.

A gas discharge port 53 is formed in the center of the plate body 51 so that the gas discharged from the inflator 30 is discharged into the airbag 40. The mounting piece 52 has an insertion hole 13 for the housing 10 and the lid 20,
Corresponding to 24, an insertion hole 54 for inserting the inflator 30 is formed.

The fixed plate 50, as shown in FIG.
The airbag 40 is attached by inserting the attachment piece 52 into the slit 43 from the inside of the airbag 40. Thus, the opening peripheral edge portion 42 of the airbag 40 is attached in close contact with the plate body 51. Then, as shown in FIG. 6, the airbag 40 may be folded.

FIG. 7 is a simplified view of the airbag device according to the present invention. Then, as shown in FIG. 7, the inflator 30 is inserted into the insertion holes 24, 13, 54, 54 of the lid 20, the housing 10 and the fixed plate 50.
The fixed plate 50 is attached to the housing 10 or the like by inserting the fixed plate 50 into the housing 13 or 24.

As shown in FIG. 8, the plate body 51 may be formed with bent pieces 55, 55 which are bent from the upper and lower ends thereof in the same direction. When the bent pieces 55, 55 are configured to substantially abut on the top plate 14 and the bottom plate 15 of the housing 10, as shown in FIG.
The opening peripheral edge portion 42 is sandwiched between the bent piece 55 and the housing 10, so that the airbag 40 can be firmly attached.

Further, as shown in FIG. 10, the projecting pieces 56, 56 may be formed by extending and forming both upper and lower end portions of the plate main body 51. In this case, the projecting pieces 56, 56 are formed on the top plate 14 and the bottom plate 15 on the opening 11 side of the housing 10.
Collar pieces 16 and 16 are formed so as to face 56.
When formed in this manner, as shown in FIG. 11, the opening peripheral edge portion 42 of the airbag 40 and the protruding piece 56 and the housing 10 are formed.
The air bag 40 can be firmly attached by being sandwiched by the collar piece 16 of FIG.

[0027]

The present invention is constructed as described above, and the housing, the lid and the inflator can be integrally attached by inserting the inflator into the insertion hole of the housing and the lid. The bag device can be assembled easily and firmly. Further, the fixing plate and the airbag can be positioned simply by inserting the mounting piece into the slit formed in the peripheral edge portion of the opening, and the mounting of the airbag is easy. Furthermore, by inserting the inflator into the insertion hole of the housing and the fixing plate, the housing, the fixing plate and the inflator can be integrally attached, and the airbag device can be easily assembled. Furthermore, by inserting the inflator into the insertion holes of the housing, the fixing plate and the lid, the housing, the fixing plate, the lid and the inflator can be integrally attached, and the number of fastening members can be reduced.
The overall positioning is easy, and the airbag device can be easily assembled. When the bent pieces are formed on the fixed plate toward the top plate and the bottom plate of the housing, the opening peripheral edge portion of the airbag is sandwiched between the bent piece and the housing, so that the mounting strength of the airbag can be enhanced. it can. Further, when the flange piece is formed on the housing and the protruding piece is formed on the fixing plate so as to face the flange piece, the opening peripheral edge portion of the airbag is sandwiched between the protruding piece and the flange piece.
The mounting strength of the airbag can be increased. And
When the reinforcing cloth is sewn to the airbag by providing the annular sewn portion at least at one place between the opening and the slit and at least the annular sewn portion at the outside of the slit, the opening of the airbag is opened. Since the peripheral portion is strengthened, the airbag can be prevented from being damaged.

[Brief description of drawings]

FIG. 1 is a front view of an airbag device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an exploded perspective view of an airbag and a fixing plate.

FIG. 5 is a perspective view showing a state in which an airbag is attached to a fixing plate.

FIG. 6 is a perspective view of an airbag attached to a fixed plate in a folded state.

FIG. 7 is a simplified exploded perspective view of an airbag device according to another embodiment.

FIG. 8 is an exploded perspective view of a fixing plate and a housing according to another embodiment.

9 is a sectional view showing a state in which the embodiment of FIG. 8 is assembled.

FIG. 10 is an exploded perspective view of a fixing plate and a housing according to another embodiment.

11 is a cross-sectional view showing a state in which the embodiment of FIG. 10 is assembled.

FIG. 12 is a perspective view of an airbag to which a reinforcing cloth is sewn.

FIG. 13 is a cross-sectional view of an airbag to which a reinforcing cloth is sewn.

[Explanation of symbols]

10 housing 11 openings 12 Side plate 13, 24, 54 insertion holes 14 Top plate 15 Bottom plate 16 collar pieces 20 lid 23 Side wall 30 inflator 40 airbag 41 opening 42 Edge of opening 43 slits 44 Reinforcement cloth 46 Inner sewing part 47 Outside sewing section 50 fixed plate 52 Mounting piece 55 bent pieces 56 Overhanging piece

─────────────────────────────────────────────────── ───Continued from the front page (56) References JP-A-6-219230 (JP, A) JP-A-6-219229 (JP, A) Fukukaihei 6-32225 (JP, U) Japanese Patent Publication 6- 39244 (JP, B2) Registered utility model 3008618 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60R 21/16-21/32

Claims (6)

(57) [Claims] 1. A housing having an opening opening to a vehicle compartment side and having insertion holes formed in both sides thereof, an inflator housed in the housing, and a lid fitted in the housing and having insertion holes formed in both sides thereof. An airbag device comprising: a body, and an inflator inserted and fixed in an insertion hole of a housing and a lid. 2. A housing having an opening opening to the passenger compartment side and having insertion holes formed on both sides, a fixing plate having a U-shaped cross section having insertion holes formed on a pair of mounting pieces, and an opening peripheral portion. The air bag is attached to the fixed plate by inserting the attachment piece into the pair of slits formed in the inflator and the inflator housed in the housing, and the inflator is inserted and fixed in the insertion holes of the housing and the fixed plate. The airbag device characterized in that. 3. A housing having an opening opening to the passenger compartment side and having insertion holes formed on both sides, a fixing plate having a U-shaped cross section having insertion holes formed on a pair of mounting pieces, and an opening peripheral edge portion. An air bag that is attached to the fixed plate by inserting the attachment pieces into the pair of slits that are formed in the housing, an inflator that is housed in the housing, and a lid body that is fitted into the housing and has insertion holes formed on both sides. An airbag device, wherein an inflator is inserted and fixed in insertion holes of a housing, a fixing plate, and a lid. 4. The airbag device according to claim 2, wherein the fixed plate is formed with bent pieces toward the top plate and the bottom plate of the housing. 5. The airbag device according to claim 2, wherein a flange piece is formed on the housing, and an overhanging piece is formed on the fixing plate so as to face the flange piece. 6. An airbag which is attached to a fixed plate by inserting a mounting piece into a pair of slits formed in a peripheral edge portion of an opening, wherein a reinforcing cloth is interposed in the peripheral edge portion of the opening, and between the opening and the slit. An airbag is characterized in that a reinforcing cloth is sewn by providing at least one annular inner sewn portion on the outside of the slit and at least one annular outer sewn portion on the outside of the slit.