JP3647558B2 - Airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag device that protects an occupant during a vehicle collision, and more particularly, to an airbag device that is suitable for a relatively small side bag that protects an occupant from a side collision.
[0002]
[Prior art]
For example, as seen in Japanese Utility Model Laid-Open No. 5-94029, most of the airbag devices that have been used in the past have assembled components such as an inflator, an airbag, and a retainer for attaching an airbag to a housing.
[0003]
[Problems to be solved by the invention]
By the way, in the airbag device, the side bag is particularly attached to a part of a seat, a door or the like, and has a relatively limited storage space.
In addition, the number of parts constituting the airbag device is not much different from the airbag device for the driver's seat or passenger's seat, and thus has a drawback that it cannot be supplied at low cost despite its small capacity. It was.
[0004]
The present invention has been made in view of such problems of the prior art, and the object of the present invention is to simplify the structure and reduce the cost sufficiently without degrading the performance. An airbag device is to be provided.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is the inflator in which the main body has a cylindrical shape, the flange is formed at one end, and the fastening portion is formed at the other end, and the plate-shaped main body And a pair of side pieces bent in the same direction from both ends of the main body, a first insertion hole into which the inflator main body can be inserted into one side piece, and a fastening portion into the other side piece. A retainer in which a second insertion hole is formed, and an airbag in which a first opening and a second opening are formed corresponding to the first insertion hole and the second insertion hole of the retainer . A slit into which the retainer can be inserted is formed between the two openings, and the retainer is inserted into the airbag from the slit. The retainer is disposed in the airbag, and the first opening and the first Insert the inflator body into the insertion hole and insert it into the second insertion hole. Beauty allowed 臨出 the fastening portion from the second opening, by engagement with fastening means to the fastening portion, is characterized in that so as to secure the air bag on each side piece of the retainer.
[0006]
Here, the inflator may be a hybrid type, and a gas outlet for ejecting compressed gas is provided at one end of the inflator body.
The fastening portion may have a configuration in which a reduced-diameter projection having a thread groove formed at one end portion of the inflator body is formed and screwed with a fixing nut as a fastening means.
The retainer is formed so that the vertical length of the main body is substantially the same as the length of the inflator main body.
The airbag may be formed by sewing the peripheral edge portions of two base fabrics, or may be formed by folding one base fabric and sewing the outer edge portion thereof. The airbag is used after being reversed after sewing. Further, the retainer mounting portion of the airbag may be reinforced by sewing a reinforcing cloth.
[0007]
The slit is formed by cutting the airbag smaller than the size of the retainer body.
The slit closes the gap when the airbag is sandwiched between the retainer and the vehicle body.
[0008]
The invention according to claim 2 is characterized in that a gas flow path is formed by stitching a portion corresponding to a gas outlet of the inflator at the periphery of the retainer mounting portion of the airbag.
The seam for forming the gas flow path may be configured to break when the entire airbag is inflated.
[0009]
According to a third aspect of the present invention, the retainer main body opposite to the protruding side piece is provided with a locking portion for mounting the retainer to the vehicle body, and an attachment hole is provided in the airbag corresponding to the locking portion. The stop portion protrudes from the mounting hole, and the airbag is sandwiched between the retainer and the vehicle body.
The locking portion may be configured by projecting a pair of protrusions from both ends of the retainer body.
[0010]
The invention described in claim 4 is characterized in that the airbag folded by attaching the retainer and the inflator is covered with a cover made of a material that is easily broken. When the retainer and the inflator are attached and the folded airbag is covered with a cover, the cover fixes the folded airbag and facilitates the work of assembling the apparatus to the vehicle body.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is an exploded perspective view of an airbag device according to the present invention, FIG. 2 is a front view of the airbag, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
[0012]
Reference numeral 10 denotes an inflator whose main body 11 has a cylindrical shape.
The inflator 10 may be a hybrid type using a compressed gas mainly composed of argon and an explosive.
A flange 12 is formed at one end of the inflator body 11.
[0013]
A plurality of gas jets 13, 13,... For jetting compressed gas are provided on the small diameter part of the other end of the inflator body 11.
The inflator 10 has a fastening portion 14 formed from the small diameter portion to the end portion.
As the fastening portion 14, for example, as shown in FIG. 1, a reduced diameter protrusion may be formed at the other end of the inflator body 11, and a screw groove 15 may be engraved on the peripheral wall.
Reference numeral 16 denotes a fixing nut which is a fastening means and is screwed into the screw groove 15 of the fastening portion 14.
[0014]
Reference numeral 20 denotes a retainer for sandwiching the inflator 10 and an air bag to be described later and attaching it to the vehicle body.
The retainer 20 has a U-shaped cross section, and has a plate-shaped main body 21 and a pair of side pieces 22 and 23 that are bent in the same direction from both ends of the retainer main body 21.
The vertical length of the retainer body 21 is formed to be substantially the same as the length of the inflator body 11.
[0015]
One side piece 22 is formed with a first insertion hole 24 that is larger than the outer diameter of the inflator body 11 and smaller than the outer diameter of the flange 12 in order to insert the inflator body 11.
The other side piece 23 is formed with a second insertion hole 25 larger than the outer diameter of the fastening portion 14 and smaller than the outer diameter of the inflator body 11 in order to insert the fastening portion 14 of the inflator 10.
[0016]
The retainer body 21 on the side opposite to the side from which the side pieces 22 and 23 protrude is provided with a locking portion 26 for attaching the retainer 20 to the vehicle body.
In the embodiment shown in FIG. 1, a pair of protrusions project from both end portions of the retainer main body 21 to form the locking portion 26.
[0017]
A washer 27 is interposed between the flange 12 of the inflator 10 and the side piece 22 of the retainer 20.
Reference numeral 28 denotes a washer interposed between the fixing nut 16 and the side piece 23 of the retainer 20.
[0018]
The airbag 30 is formed by sewing the peripheral portions of two base fabrics 31 and 32 having a substantially square shape.
These base fabrics 31 and 32 may be woven fabrics coated with rubber or synthetic resin, or may be simple woven fabrics.
The airbag 30 is reversed and used after sewing.
[0019]
A reinforcing cloth 34 made of the same material as the base cloths 31 and 32 is sewn to the end part (retainer attaching part 33) of one base cloth 31 as a reinforcement when the retainer 20 is attached.
The reinforcing cloth 34 may be composed of a plurality of sheets. In the example shown in FIG. 3, the reinforcing cloth 34 is composed of two sheets on the front side of the base cloth 31 and two sheets on the back side.
[0020]
Corresponding to the first insertion hole 24 and the second insertion hole 25 of the retainer 20, a first opening 35 and a second opening 36 are formed in the retainer mounting portion 33 of the airbag 30.
The first opening 35 is substantially equal to the outer diameter of the inflator body 11 in order to insert the inflator body 11.
For reinforcement, the base cloth 31 and the reinforcing cloth 34 are sewn in an annular shape so as to surround the first opening 35.
[0021]
The second opening 36 is formed to be larger than the outer diameter of the fastening portion 14 and smaller than the outer diameter of the inflator body 11 in order to insert the fastening portion 14 of the inflator 10.
For reinforcement, the base cloth 31 and the reinforcing cloth 34 are sewn in an annular shape so as to surround the second opening 36.
[0022]
A slit 37 is cut into a portion of the airbag 30 between the first opening 35 and the second opening 36 that is smaller than the size of the retainer main body 21.
The slit 37 is for inserting the retainer 20 into the airbag 30 and may be cut into other shapes such as an L shape in addition to the U-shape of the illustrated example.
[0023]
Mounting holes 38 and 38 are provided at the upper and lower portions of the airbag 30 where the slits 37 are provided, corresponding to the locking portions 26 and 26 of the retainer 20.
In order to reinforce the airbag 30, the base cloth 31 and the reinforcing cloth 34 are sewn in an annular shape so as to surround the slit 37 and the attachment holes 38, 38.
[0024]
In the above embodiment, the retainer 20 is inserted into the airbag 30 from the slit 37 and disposed, and the locking portions 26 and 26 of the retainer 20 protrude from the mounting holes 38 and 38 of the airbag 30.
In addition, when this apparatus is attached to the vehicle body, the slit 37 is held in contact with the surface of the retainer main body 21 and the vehicle body to close the gap.
[0025]
Next, the first opening 35 of the airbag 30 and the first insertion hole 24 of the retainer 20 are aligned, and the inflator body 11 is inserted into the washer 27, the first opening 35, and the first insertion hole 24.
Then, the second insertion hole 25 of the retainer 20 and the second opening 36 of the airbag 30 are aligned with each other, and the fastening portion 14 protrudes from the second insertion hole 25, the second opening 36, and the washer 28, and is screwed. A fixing nut 16 is fastened to the groove 15.
[0026]
In this way, the airbag 30 is fixed to the both side pieces 22 and 23 of the retainer 20, and the inflator 10, the retainer 20, and the airbag 30 can be fixed integrally.
And by attaching the latching | locking part 26,26 of the retainer 20 to a vehicle body, the airbag 30 is clamped between the retainer main body 21 and a vehicle body.
Therefore, in the above embodiment, since the airbag 30 can be fixed directly to the vehicle body when the airbag device is attached, a base plate or the like for completely fixing the airbag in advance as in the prior art becomes unnecessary.
[0027]
FIG. 4 is a front view showing another embodiment of the airbag.
The airbag 40 is different from the airbag 30 in that the airbag 30 is sewn on the peripheral portions of the two base fabrics 31 and 32, whereas the non-sewn portion is not sewn in part. 41 is provided.
The airbag 40 is used by reversing the inner and outer surfaces from the non-sewn portion 41 after sewing.
[0028]
In this embodiment, when the retainer 20 is attached to the airbag 40, the retainer 20 can be inserted from the non-sewn portion 41, so there is no problem even if the slit 37 in the airbag 30 is not provided.
The non-sewn portion 41 may be sewn and closed after the retainer 20 and the inflator 10 are attached, or may be an exhaust hole for gas generated in the inflator 10 without being sewn as it is.
The airbag 40 is the same as the airbag 30 in other points.
[0029]
FIG. 5 is a front view showing another embodiment of the airbag.
The airbag 50 is different from the airbag 30 in that a gas flow path is provided so that the airbag 50 can be uniformly inflated and deployed when the inflator 10 having the gas ejection ports 13 and 13 provided at one end thereof is used. The rest is the same as the airbag 30.
[0030]
This gas flow path may be formed by sewing the base fabrics 31 and 32 at the periphery of the retainer mounting portion 33 of the airbag 50 corresponding to the gas ejection port 13 of the inflator 10.
In the example shown in FIG. 5, the base cloth 31 and the base cloth 32 are stitched. However, the reinforcing cloth 34 is made larger, and the base cloths 31 and 32 and the reinforcing cloth 34 are stitched to form a gas flow path. May be formed.
[0031]
If the gas flow path is formed, the gas ejected from the inflator 10 enters the airbag 50 from the stitched portion 52 through the non-stitched portion 51, and the airbag 50 is entirely biased without partial biasing of the gas. Uniformly expands.
The stitching portion 52 may be configured to break when the entire airbag 50 is inflated.
[0032]
FIG. 6 is a front view showing another embodiment of the airbag.
The airbag 60 is different from the airbag 30 in that the airbag 30 is formed by sewing the peripheral portions of the two base fabrics 31 and 32, whereas the single base fabric 61 is provided. And the outer edge portion is sewn, and the reinforcing cloth 34 is sewn on the folded portion.
Others are the same as those of the airbag 30.
[0033]
The airbags 30, 40, 50, 60 to which the retainer 20 and the inflator 10 are attached are appropriately folded and stored in the vehicle body.
7 and 8 show a cover 70 that facilitates handling of the apparatus when the vehicle body is stored.
[0034]
The cover 70 is made of a material that is easily broken, such as a nonwoven fabric.
The cover 70 is provided with through holes 71 at both ends for inserting the locking portions 26 of the retainer 20.
Then, with respect to the airbags 30, 40, 50, 60 folded with the retainer 20 and the inflator 10 attached thereto, the retaining portions 26 of the retainer 20 are inserted into the through holes 71 provided at one end, and the retainer 20, the inflator 10, The airbag 30, 40, 50, 60 is covered to make a round, and the locking portion 26 of the retainer 20 is inserted into the through hole 71 provided at the other end portion, and is stopped using an adhesive tape 72 or the like.
[0035]
As described above, when the folded airbags 30, 40, 50, 60 are integrally bound to the retainer 20 by the cover 70, the cover 70 fixes the folded airbag, so that the operation of assembling the apparatus on the vehicle body is easy. It becomes.
If the cover 70 is provided with a break line 73 on the side opposite to the locking portion 26, the cover 70 is easily broken along the break line 73 when the inflator 10 is operated, and further, the airbag is easily inflated and deployed. Become.
[0036]
FIG. 9 shows the apparatus using the airbag 30 attached to the vehicle body for side collision, and FIG. 10 shows the apparatus using the airbag 60 attached to the vehicle body for side collision.
When this device is used, it is compact, simple in structure, and easy to attach to the vehicle body.
In addition, 81 is a seat back that constitutes a seat back portion, 82 is a urethane portion of the seat back, 83 is an occupant's head, and 84 is an occupant's shoulder.
[0037]
【The invention's effect】
As described above, the invention of claim 1 of the present invention, the first opening of the air bag by the side pieces of the flange and the retainer of the inflator, the second opening is closed by a side piece and the fastening means of the retainer There is no risk of gas leakage exceeding the setting, and the airbag can be firmly fixed between the retainer and the vehicle body.
Therefore, an airbag device having a very simple structure can be provided without impairing performance.
[0039]
According to the second aspect of the present invention, since the gas flow path is formed by stitching with the non-stitched portion partially left on the periphery of the retainer mounting portion of the airbag, it is not necessary to use a diffuser separately, and the apparatus is simplified. It can be cheap.
[0040]
According to a third aspect of the present invention, the first opening and the second opening of the airbag and the first insertion hole and the second insertion hole of the retainer are easily positioned by projecting the locking portion from the mounting hole. Can be assembled easily.
Even when the retainer is provided with a slit for inserting the retainer, the slit can be closed between the retainer and the vehicle body when the retainer is attached to the vehicle body.
[0041]
According to the fourth aspect of the present invention, since the airbag with the cover folded is fixed, the operation of assembling the apparatus to the vehicle body becomes easy. Further, since the cover is made of a material that is easily broken, it does not hinder the inflation and deployment of the airbag.
According to the present invention, the base plate is unnecessary, the structure is simple, and the capacity can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an airbag device according to the present invention.
FIG. 2 is a front view of the airbag.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a front view of an airbag according to another embodiment.
FIG. 5 is a front view of an airbag according to another embodiment.
FIG. 6 is a front view of an airbag according to another embodiment.
FIG. 7 is a front perspective view of the airbag device assembled.
FIG. 8 is a rear perspective view of the airbag device assembled.
FIG. 9 is a plan view of the airbag in an inflated state.
FIG. 10 is a plan view showing a state where an airbag according to another embodiment is inflated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Inflator 11 Inflator main body 12 Flange 13 Gas outlet 14 Fastening part 16 Fixing nut 20 Retainer 21 Retainer main body 22,23 Side piece 24 1st insertion hole 25 2nd insertion hole 26 Locking part 30,40,50,60 Airbag 33 Retainer mounting portion 35 First opening 36 Second opening 37 Slit 38 Mounting hole 41 Non-sewn portion 51 Non-sewn portion 52 Suture portion 70 Cover

Claims (4)

An inflator in which the main body has a cylindrical shape, a flange is formed at one end, and a fastening portion is formed at the other end;
It has a plate-shaped main body and a pair of side pieces bent in the same direction from both ends of the main body, and a first insertion hole into which the inflator main body can be inserted in one side piece, and a fastening portion in the other side piece Retainers each having a second insertion hole into which can be inserted;
An airbag having a first opening and a second opening corresponding to the first insertion hole and the second insertion hole of the retainer;
A slit capable of inserting the retainer is formed in a portion between the first opening and the second opening of the airbag, and the retainer is inserted into the airbag from the slit,
A retainer is disposed in the airbag, the inflator body is inserted into the first opening and the first insertion hole, the fastening part is projected from the second insertion hole and the second opening, and the fastening part is fastened by fastening means. Thus, the airbag device is configured to fix the airbag to both side pieces of the retainer. And suturing the portion corresponding to the gas port of the inflator retainer mounting portion peripheral edge of the airbag, the airbag apparatus according to claim 1, characterized in that the formation of the gas passage. The retainer body on the opposite side of the protruding side piece is provided with a locking part for attaching the retainer to the vehicle body, and an attachment hole is provided in the airbag corresponding to this locking part, and the locking part protrudes from the mounting hole. The airbag apparatus according to claim 1 or 2 , wherein the airbag is sandwiched between the retainer and the vehicle body. The airbag apparatus according to claim 1, 2 or 3, wherein an airbag folded by attaching a retainer and an inflator is covered with a cover made of a material that is easily broken.

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