JP4193657B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag that inflates and deploys in the vicinity of an occupant seated in a seat disposed in a room inside the vehicle body when an impact of a predetermined level or more is applied to the body of the vehicle, and an inner side of a base end portion of the airbag And a cylinder type inflator for inflating and deploying an airbag.

  In recent years, as this type of airbag device, there is a side airbag device embedded in a side portion on the vehicle outer side of a backrest portion connected to a seating portion of a vehicle seat. In the side airbag device, the airbag is inflated and deployed between the side portion of the body from the side portion of the backrest portion toward the front in the traveling direction, that is, between the side door and the occupant when the vehicle collides.

A base end portion of the airbag is provided with a housing portion for housing the inflator and an insertion port for inserting the inflator from the outside into the housing portion. Then, after the inflator is accommodated in the accommodating portion, in order to suppress excessive exhaust from the insertion opening when the airbag is deployed, the insertion opening is sewn with a sewing thread to reduce the opening area. Has been. (See Patent Document 1)
JP 9-86326 A

However, the conventional side airbag device has a problem that the manufacturing cost increases because it is necessary to perform the troublesome closing and sewing operation of the insertion port with a sewing thread in a separate process.
The present invention eliminates the problems associated with the prior art described above, eliminates the sewing work with the sewing thread for reducing the opening area of the insertion opening of the inflator, and can reduce the manufacturing cost. To provide an apparatus.

In order to solve the above-described problems, the invention according to claim 1 expands in the vicinity of an occupant seated in a seat disposed in a room inside the body when an impact of a predetermined level or more is applied to the body of the vehicle. In an airbag apparatus comprising an airbag to be deployed and a cylinder type inflator that is accommodated in the airbag and inflates and deploys the airbag, a connector for connecting a harness is provided at an end of the inflator. An inflator is provided at a base end portion of the airbag, an inflator is inserted at an end of the accommodation portion and an insertion port for exposing the connector is provided in the inflator. An attachment member that is provided and attached to the body side is protruded to the outside from an extraction hole formed in the housing portion, and is opposed to the housing portion. The diaphragm fabric portions to reduce the opening area of the insertion port is provided, provided with retaining means HiNui Chakushiki for holding state squeezing the narrowed fabric portions.

The invention according to claim 1, diaphragm fabric portions before Symbol airbag that look like folded in three layers insertion opening is narrowed.

The invention described in claim 1, in the prior SL diaphragm fabric portions, the first to third locking hole also serves as a take-out hole to be engaged to the bolt as a mounting member provided in said inflator Formed side by side in the circumferential direction of the inflator housed in the housing portion, after engaging the first locking hole with the bolt, the second and third locking holes are overlapped with each other. the stop holes are attracted to the bolt side, the fabric portions aperture by engaging the Ryokakaritomeana bolts that have adapted to hold folded three layers.

  According to the present invention, the cylinder-type inflator is inserted into the inside of the housing portion from the insertion port of the housing portion provided at the base end portion of the airbag, and the squeezing cloth portion provided in the housing portion of the airbag is squeezed. In this state, after the opening area of the insertion opening is reduced, it can be held by non-sewn holding means. For this reason, it is not necessary to close and sew the insertion port with the sewing thread, and the manufacturing cost can be reduced.

Below, one Embodiment which actualized this invention to the side airbag apparatus is described based on FIGS.
FIG. 1 shows a side surface of a vehicle seat, and FIG. 2 shows an enlarged front view of an airbag device. As shown in FIG. 1, a seat 12 on which a passenger P is seated is mounted on the bottom 11 of the vehicle body. The seat 12 is mounted on the bottom 11 of the body through a front / rear position adjustment mechanism 13 so that the position of the vehicle in the traveling direction can be adjusted, and a backrest mounted on the rear end of the seat 14. Part 15. A side airbag device 16 is attached to the backrest 15.

Next, the side airbag device 16 embedded in the backrest 15 will be described.
As shown in FIG. 2, the side airbag device 16 of the present embodiment includes a pair of base fabrics 17a and 17b made of, for example, a woven fabric such as nylon (the base fabric 17a on the front side in FIG. 2 and the base fabric 17b on the back side). ) And the airbag 17 formed in a bag shape by sewing with the sewing thread 18 and the storage portion 17c formed integrally with the base end portion (the left side in FIG. 2) of the airbag 17. And an inflator 19 functioning as a gas generation source. Further, the side airbag device 16 includes a retainer 20 for attaching the airbag 17 and the inflator 19 to predetermined positions in the backrest portion 15. The airbag 17, the inflator 19, and the retainer 20 are accommodated in a case 21 provided in the backrest portion 15 of the vehicle seat 12 shown in FIG. The case 21 is embedded and fixed to the end of the backrest 15 on the side door (not shown) side.

  The side door (not shown) is provided with a sensor (not shown) that detects an impact applied to the door from the side of the vehicle. This sensor is connected to the inflator 19 via a control circuit (not shown).

  The airbag 17 that is inflated and deployed in the shape of a side surface shown in FIGS. 1 and 2 is accommodated in the case 21 together with the inflator 19 and the retainer 20 in a folded state. The airbag 17 is inflated and deployed toward the front in the vehicle traveling direction with respect to a space formed between the occupant P sitting on the seat 12 and the side door.

  The base end portions of the two base fabrics 17a and 17b constituting the airbag 17 are integrally connected to each other as shown in FIGS. 2 and 4, and this base end portion accommodates the inflator 19 and the retainer 20. It is part 17c. An insertion port 17d for accommodating the inflator 19 in the accommodating portion 17c from below to above is provided at the lower end of the accommodating portion 17c (see FIG. 3). A reinforcing cloth 22 is brought into contact with the inner peripheral surface of the accommodating portion 17c, and an edge portion of the reinforcing cloth 22 on one base cloth 17a side is sewn to the base cloth 17a by a sewing thread 23, and the other base cloth 17b. The side edge is sewn to the base fabric 17b by a sewing thread 23 (see FIG. 4).

  The inflator 19 is accommodated in the retainer 20 as shown in FIGS. The inflator 19 includes a gas injection port 25 at an upper end portion, and a connector 27 for connecting a harness 26 to the lower end portion. The gas injected from the injection port 25 of the inflator 19 is supplied to the inside of the airbag 17 as shown by the broken arrow in FIG. 2 so that the airbag 17 is inflated and deployed.

  The retainer 20 is formed in a cylindrical shape by an iron plate, and the caulking cut-and-raised piece 20 a provided in the retainer 20 is caulked on the outer peripheral surface of the inflator 19 while the inflator 19 is accommodated therein as shown in FIG. 3. The inflator 19 is held at a predetermined position by being attached. First and second bolts 28 and 29 as mounting members are penetrated through the retainer 20 at two upper and lower portions so as to protrude from the inside to the outside, and both the bolts 28 and 29 are connected to the retainer 20 by welding.

Next, a characteristic configuration of the present invention will be described.
FIG. 5 is a perspective view showing the accommodating portion 17c of the airbag 17 upside down.
The opening 17d of the housing portion 17c has a large opening area so that the inflator 19 and the retainer 20 can be easily inserted. Since the opening area is set large, an excess cloth portion is generated in the cloth of the accommodating portion 17c that forms the insertion port 17d. In this embodiment, the surplus cloth portion is the drawn cloth portion 17e. The drawn cloth portion 17e is formed with first to third locking holes 17f, 17g, and 17h that are locked to the one bolt 29 and also serve as an extraction hole. The drawn cloth portion 17e is formed with first to third locking holes 17f ′, 17g ′, and 17h ′ that are locked to the other bolt 28 and also serve as an extraction hole. .

The operation of narrowing the insertion port 17d by narrowing the drawn cloth portion 17e is performed as follows.
As shown in FIG. 5, the inflator 19 and the retainer 20 are accommodated in the accommodating portion 17c from the insertion port 17d, and the bolts 29 (28) are engaged with the locking holes 17f, 17g, 17h (17f ′, 17g ′) of the drawn cloth portion 17e. , 17h ′). Then, the first locking hole 17f (17f ′) is locked to the bolt 29 (28) as shown in FIG. Next, the drawn cloth portion 17e is drawn into the bolt 29 (28) side so as to be folded in two layers as shown in FIG. 6A, and the second and third locking holes 17g, 17h ( 17g ', 17h') is locked to the bolt 29 (28) as shown in FIG. 6 (b). Thus, the squeezed cloth portion 17e is locked to the bolt 29 (28) in a squeezed state in which the squeezed cloth portion 17e is folded into three layers as a whole.

  The insertion port 17d is not completely shielded by the narrowing of the drawn cloth portion 17e, and a gap S is formed as shown in FIG. 6 (b). The gap S is preferably as small as possible, but it can also function as a vent hole for releasing gas to the outside after the airbag 17 is inflated and deployed. If the gap S is insufficient, a vent hole provided separately in the airbag 17 is used. Since the drawn cloth portion 17e itself has a certain degree of elasticity, the degree of narrowing can be increased by stretching the drawn cloth portion 17e when folded into the above-described three layers to be in the drawn-down state.

  As shown in FIG. 4, the first and second bolts 28 and 29 are penetrated through holes provided in the bottom plate of the case 21 embedded in the backrest 15, and the case 21 is a frame (not shown) in the backrest 15. On the other hand, the nuts 31 screwed into the bolts 28 and 29 are fastened and fixed in place.

  In the side airbag device 16 configured as described above, an operation signal is output from the control circuit to the inflator 19 via the harness 26 when a predetermined or more impact is detected by a sensor provided on a side door (not shown). The Then, the inflator 19 instantaneously ejects gas into the airbag 17 based on this operation signal. With this gas, the airbag 17 is instantly inflated and deployed toward the front in the traveling direction of the vehicle as shown in FIGS. 1 and 2, and is sandwiched between the side door and the occupant P to protect the occupant P. The gas in the inflated airbag 17 is discharged to the outside through the gap S that functions as a vent hole, and the airbag 17 is reduced.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) The cylinder type inflator 19 is inserted into the housing portion 17c from the insertion port 17d of the housing portion 17c provided at the base end portion of the airbag 17. Thereafter, the squeezed cloth portion 17e provided in the airbag accommodating portion 17c is brought into a squeezed state in which the squeezed cloth portion 17e is folded into three layers using the bolts 28, 29 and the first to third locking holes 17f, 17g, 17h. I tried to keep it. For this reason, the insertion port 17d need not be closed and sewn with a sewing thread, and the manufacturing cost can be reduced.

  (2) Since the squeezed cloth part 17e of the airbag 17 is formed using the cloth of the accommodating part 17c, the squeezed cloth part 17e can be formed without using another member, and the number of parts is reduced. In addition, manufacturing can be performed easily and cost can be reduced.

  (3) Bolts 28 and 29 having functions as mounting members provided in the inflator 19 and first to third locking holes 17f, 17g, and 17h (also serving as extraction holes locked to the bolts) 17f ′, 17g ′, and 17h ′), the drawn cloth portion 17e is held in a drawn-down state folded in three layers. For this reason, the number of parts of the holding means for holding the narrowed state can be reduced, manufacturing can be performed easily, and cost can be reduced.

(Modification)
Each of the above embodiments may be modified as follows.
As shown in FIG. 7, a slit 17i is formed in the squeezed cloth part 17e, and the engaging hole 17f formed in one of the squeezed cloth parts 17e is engaged with the bolt 29 as shown in FIG. The cloth portion 17e ′ is pulled into the throttle position, and the locking hole 17h is locked to the bolt 29. The pair of drawn cloth portions 17e and 17e ′ are overlapped in two layers by the slit 17i, thereby narrowing the insertion port 17d.

Also in this alternative example, it is not necessary to close and sew the insertion port 17d with the sewing thread, and the manufacturing cost can be reduced.
As shown in FIG. 9, the inflator 19 may be accommodated upside down in the accommodating portion 17 c, and the female connector 26 a provided on the harness 26 may be connected to the upper male connector 27.

  In another example shown in FIG. 7, as shown in FIG. 10, the locking hole 17h is formed in a long hole shape, the locking hole 17f of one drawn cloth portion 17e is locked to the bolt 29, and the other The locking hole 17h of the drawn cloth portion 17e 'is locked. Thereafter, the other squeezed cloth part 17e ′ may be further squeezed, and the squeezed cloth parts 17e and 17e ′ may be held in the squeezed state by the nut 31 screwed into the bolt 29. In this example, the degree of restriction of the insertion opening 17d can be increased.

The bolts 28 and 29 may be directly connected to the outer peripheral surface of the main body of the inflator 19.
In the above-described embodiment, the connector 27 is disposed on the insertion port 17d side. However, the harness 26 may be led out from the lead-out hole 32a provided in the tongue piece 32 by being disposed on the opposite side.

-Although not shown, instead of the bolts 28 and 29, attachment members such as engagement pins or caulking pins may be used.
In the above embodiment, the case 21 may be omitted as long as the air bag 17 is suitably accommodated and inflated and deployed.

  In the above-described embodiment, the airbag 17 for protecting the occupant's waist and chest is embodied as an airbag 17 for protecting the shoulder in addition to the waist and chest, or the waist, chest, and shoulder. You may embody in the airbag for protecting a part and a head.

  Other than the side airbag device, for example, it is provided in the lower part of the backrest portion 15 of the seat 12 and is embodied in an airbag device that protects the knee of the passenger seated on the rear seat, or in other airbag devices It may be converted.

1 is a side view of a seat and an inflated and deployed airbag showing an embodiment in which the present invention is embodied in a side airbag device. The front view of an airbag apparatus. Sectional drawing along the AA line of FIG. Sectional drawing along the BB line of FIG. The perspective view which expands and shows the principal part of an airbag apparatus. (A), (b) is sectional drawing which expands and shows the principal part of an airbag apparatus. The partial expansion perspective view which shows another example of this invention. Sectional drawing of the principal part of another example of FIG. The front view of the airbag apparatus which shows another example of this invention. Sectional drawing of the airbag which shows another example of this invention.

Explanation of symbols

  P ... occupant, 12 ... seat, 17 ... airbag, 17c ... housing part, 17d ... insertion port, 17e ... squeezed cloth part, 17f ... first locking hole, 17g ... second locking hole, 17h ... first 3 locking holes, 17i ... slit, 19 ... inflator, 28, 29 ... bolt.

Claims (1)

An airbag that inflates and deploys in the vicinity of an occupant seated on a seat disposed in a room inside the vehicle body when an impact exceeding a predetermined level is applied to the vehicle body, and the airbag that is accommodated in the airbag and inflates. In an airbag device comprising a cylinder-type inflator for deployment,
A connector for connecting a harness is provided at an end portion of the inflator, a housing portion for housing the inflator is provided at a base end portion of the airbag, and the inflator is inserted into an end portion of the housing portion. In addition, an insertion port for exposing the connector is provided, an attachment member provided on the inflator and attached to the body side is protruded to the outside from an extraction hole formed in the housing portion, and the insertion portion is inserted into the housing portion. A squeezed cloth part for reducing the opening area of the mouth is provided, and a non-sewn holding means for holding the squeezed cloth part in a squeezed state is provided,
The squeezed cloth part of the airbag is folded into three layers so that the insertion opening is squeezed,
The squeezed cloth portion has first to third locking holes that also serve as extraction holes locked to bolts as mounting members provided in the inflator in the circumferential direction of the inflator accommodated in the accommodating portion. After the first locking holes are engaged with the bolts, the locking holes are pulled to the bolt side with the second and third locking holes overlapped to form the bolts. An airbag device characterized in that the drawn cloth portion is folded and held in three layers by engaging both locking holes .

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