JP4554392B2 - Air bag body - Google Patents

Description

  The present invention relates to an airbag bag body that is attached to a side portion of a vehicle body in a folded state and that is deployed between a vehicle body side wall and an occupant to protect the occupant when the vehicle collides.

2. Description of the Related Art As a vehicle airbag device, a curtain airbag that is deployed inside a vehicle body side wall and protects a passenger's temporal region at the time of a vehicle collision is known.
This airbag device is accommodated from the front pillar to the roof side rail and the rear pillar with the airbag bag body folded, and when the vehicle collides, high pressure gas is ejected from the inflator so that the bag body is deployed. . The bag body is provided with an inflatable portion for the front seat and an inflatable portion for the rear seat, and high-pressure gas ejected from the inflator is introduced into the front and rear inflatable portions.

In the bag body of the airbag device, a non-inflatable portion is provided between an inflatable portion for the front seat and an inflatable portion for the rear seat, and the front and rear inflatable portions communicate with each other through a gas passage. If this gas passage has a small flow passage area, the completion of inflation of the other inflatable portion at the time of collision is delayed, so in the conventional airbag bag body, the inflation completion speed of the inflatable portion can be increased by providing a plurality of gas passages in parallel. There has been a device to speed up (see Patent Documents 1 and 2).
JP 2003-246254 A JP 2004-291857 A

  In such an airbag bag body, rigidity is ensured by introducing high-pressure gas in the inflatable portion, but it is difficult to secure rigidity and stabilize the deployment behavior in the non-inflatable portion. As a countermeasure, for example, a structure such as a tether belt strap can be separately attached. In this case, however, a separate member needs to be added to the bag body, resulting in an increase in manufacturing cost.

  Therefore, the present invention is intended to provide an airbag bag body that can secure the rigidity of the non-inflatable portion and stabilize the deployment behavior without causing an increase in manufacturing cost.

To achieve the above object, an invention according to claim 1, a plurality of expansion portions of the front seat to be inflated by introduction of high pressure gas (e.g., inflatable portion cell 8A~8C in the embodiment to be described later), after A plurality of seat-side inflatable portions (for example, inflatable portion cells 7A and 7B in the embodiments described later) and a non-inflatable portion (for example, in the embodiments described later ) that are provided between the plurality of inflatable portions and into which high-pressure gas is not introduced. Non-inflatable portions 9A to 9D), which are attached to the side of the vehicle body in a folded state and are deployed between the vehicle body side wall and the occupant by introducing high-pressure gas at the time of a vehicle collision, A plurality of auxiliary inflatable portions (for example, gas pressure introduction passages 14 and 15 in embodiments described later) are formed in the non-inflatable portion at least partially inclined with respect to the deployment direction of the bag body. Non-inflating With fractionating the non-inflatable portion by placing in a direction intersecting the inner front of at least one pair of inflatable portions at diagonal positions of the seat and the rear seat, mutually through the auxiliary expansion portion It was made to conduct.

  In the case of the present invention, when high-pressure gas is introduced into the bag body at the time of a vehicle collision, at least a part of the plurality of auxiliary inflating portions arranged in the direction intersecting with the non-inflating portion is oblique to the deployment direction of the bag body Inflates to run. When the plurality of auxiliary inflating portions are inflated in this way, the plurality of inflating auxiliary inflating portions fractionate the inside of the non-inflating portion.

According to the first aspect of the present invention, at least a part of the plurality of auxiliary inflating portions arranged in the direction intersecting with the non-inflating portion is inflated so as to run in an oblique direction with respect to the deployment direction of the bag body at the time of vehicle collision. Therefore, the deployment behavior of the bag body can be stabilized, and the inside of the non-inflatable portion is fractionated by the auxiliary inflatable portion when the gas pressure is introduced. Can also be increased.
Furthermore, according to the present invention, since at least one pair of inflating portions at diagonal positions on the front seat side and the rear seat side are connected to each other via the auxiliary inflating portion, the pressure of each inflating portion at the time of collision is reduced. The unevenness can be efficiently eliminated, and the pressure applied to a part of the expanding portions at the time of the secondary collision can be dispersed over a wide range, so that the collision impact can be efficiently reduced.
And since an auxiliary | assistant expansion | swelling part can be easily set by sewing etc. of a bag body, the rise in manufacturing cost can also be suppressed.

  Embodiments of the present invention will be described below with reference to the drawings. In each embodiment described below, common parts are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a front view of the airbag bag body 1 according to the first embodiment of the present invention in a deployed state. In FIG. 1, reference numeral 2 denotes a front pillar of a vehicle to which the airbag bag body 1 is attached. 3 is a roof side rail, and 4 is a rear pillar.
This airbag bag body 1 is used for a so-called curtain airbag that is deployed between a vehicle body side wall and an occupant in the event of a vehicle collision to mainly protect the occupant's temporal region, and is folded up and down in the figure. It is housed in the wall surface on the vehicle interior side from the front pillar 2 to the roof side rail 3 and the rear pillar 4.

  The airbag bag body 1 is formed in a substantially rectangular shape whose deployment shape is long in the longitudinal direction of the vehicle body, and a gas introduction port 5 is provided above an end portion on the rear side of the vehicle body. For example, an inflator 6 that is activated by a signal from the control device is connected to the gas introduction port 5 at the time of a side collision, a fall, or a prediction thereof. The airbag bag body 1 is formed by sewing a flexible woven fabric, and includes a plurality of inflatable portion cells 7A, 7B, 8A to 8C and non-inflatable portions 9A to 9D. The upper edge and the front edge stitching portion of the airbag bag body 1 are appropriately coupled to the vehicle body via a bracket or the like. In FIG. 1, cross-hatching is provided in the non-inflatable portions 9 </ b> A to 9 </ b> D on the inner side of the airbag bag body 1 and the stitching area in the peripheral portion.

  In the airbag 1, the rear seat side inflatable cell 7A and 7B and the front seat side inflatable cell 8A to 8C are arranged with the central non-inflatable portion 9A to 9D in between. ing. The rear-seat-side inflatable cells 7A and 7B are formed so as to sandwich the partition wall 10 formed by sewing the bag body 1 and communicate with each other, and one of the inflatable cells 7A is connected to the gas inlet 5. . The front seat side inflatable cells 8A to 8C are formed with the partition walls 11A and 11B formed by sewing the bag body 1 therebetween, and are similarly communicated with each other. Moreover, the expansion part cell 8C is provided with a relief valve 16 for releasing excessive internal pressure. In this embodiment, the expansion part cells 7A and 7B constitute the rear side expansion part, and the expansion part cells 8A to 8C constitute the front side expansion part.

  Also, above and below the central non-expandable portions 9A to 9D, a first conduction path 12 that connects the expansion section cells 7A and 8A and a second conduction path 13 that connects the expansion section cells 7B and 8C, respectively, are substantially horizontal. It is provided to extend.

  On the other hand, the non-inflatable portions 9A to 9D are provided in a substantially trapezoidal block shape at the center of the bag body 1, and the non-inflatable portions 9A to 9D are paired with a pair of gas pressure introduction passages 14 and 15 ( It is fractionated by the auxiliary expansion part). The gas pressure introduction paths 14 and 15 are inclined with respect to the deployment direction (vertical direction in the drawing) of the bag body 1 and connect the expansion portion cells 7A and 8C and 7B and 8A at diagonal positions almost linearly. So that it extends. The first and second conduction paths 12 and 13 and the gas pressure introduction paths 14 and 15 are all formed by sewing the bag body 1. Further, the gas pressure introduction paths 14 and 15 are set to have a smaller cross-sectional area than the expansion part cells 7A, 7B, 8A to 8C and the first and second conduction paths 12 and 13.

  The periphery of the blocks of the non-inflatable portions 9A to 9D is surrounded by the upper and lower conductive paths 12 and 13 and the front and rear (left and right in the figure) inflatable portion cells 7A and 8A. The surrounding area is surrounded in a truss shape by the gas pressure introduction paths 14 and 15 and the conduction paths 12 and 13 or the expansion portion cells 7A and 8A.

The airbag bag body 1 configured as described above is accommodated in the inner wall of the vehicle body in a folded state in the vertical direction, and when the inflator 6 is activated in the event of a vehicle collision, the high-pressure gas from the gas introduction port 5 is stored. Will be deployed in the passenger compartment.
Specifically, when high-pressure gas is introduced from the gas introduction port 5, the high-pressure gas flows into the expansion portion cells 7A and 7B on the rear seat side, and further, the first and second conduction paths 12 and 13 and the gas. It flows into the expansion part cells 8A to 8C on the front seat side through the pressure introduction paths 14 and 15. At this time, the gas pressure introduction paths 14 and 15 which are auxiliary inflating parts are inflated so as to run obliquely with respect to the deployment direction of the bag body 1 by introduction of the high-pressure gas, and around the non-inflating parts 9A to 9D. Apply tension to spread. Accordingly, the non-inflatable portions 9A to 9D are rapidly deployed together with the inflatable portion cells 7A, 7B, 8A to 8C, and the deployment behavior of the entire airbag bag body 1 is stabilized.

  Further, in the airbag bag body 1 deployed in this way, since the blocks of the non-inflatable portions 9A to 9D are fractionated by the pair of gas pressure introduction passages 14 and 15 into which the high-pressure gas is introduced, the non-inflatable portions 9A to 9D. High rigidity can be maintained. In particular, in the case of this embodiment, the peripheral area of each of the non-expanding parts 9A to 9D is formed by a pair of gas pressure introduction paths 14 and 15 into which high-pressure gas is introduced and the conduction paths 12 and 13 or the expansion part cells 7A and 8A. Since it is surrounded by the truss shape, the rigidity of the peripheral area of the non-expandable portions 9A to 9D can be efficiently increased. Therefore, the impact of the secondary collision input to the expansion part cells 7A, 7B, 8A to 8C can be reliably supported.

  Since this airbag bag body 1 can reliably obtain the above effects by improving the passage configuration by sewing without adding another member, an increase in manufacturing cost can be suppressed.

Further, the airbag 1 includes the front seat side inflatable cells 8A to 8C and the rear seat side inflatable cells 7A and 7B together with the first and second conducting passages 12 and 13 and the gas pressure introduction passage 14. , 15 can also be conducted, so that the pressure difference between the front seat side expansion portion cells 8A to 8C and the rear seat side expansion portion cells 7A and 7B at the time of the secondary collision can be reduced, and at the time of the secondary collision, The pressure applied to the expansion part cell of the part can be dispersed over a wide range, and the impact can be efficiently reduced. In particular, in this embodiment, the expansion portion cells 8C and 7A, 8A and 7B at the diagonal positions on the front seat side and the rear seat side are electrically connected to each other via the gas pressure introduction passages 14 and 15. Therefore, the variation in pressure for each of the expansion cells 7A, 7B, 8A to 8C can be more efficiently eliminated.
Moreover, since the relief valve 16 is provided in the expansion part cell 8C and the rise of the excessive pressure inside the bag body 1 is suppressed, this also contributes to relieve the impact at the time of a secondary collision. Yes.

  Note that the cross-sectional area of the gas pressure introduction passages 14 and 15 as auxiliary expansion portions is basically set smaller than the other conduction passages 12 and 13 in order to stabilize the deployment behavior and ensure rigidity. Although advantageous, the gas reservoir may be formed by positively increasing the cross-sectional area of a part of the gas pressure introducing passages 14 and 15, thereby improving the cushion performance.

  In the embodiment described above, the expansion portion cells 8C and 7A and 8A and 7B at the diagonal positions are made conductive by the pair of gas pressure introduction passages 14 and 15 as auxiliary expansion portions, respectively. As shown in the second embodiment, one gas pressure introduction path 15 may be closed on the way. In the case of this embodiment, of the one gas pressure introduction path 15, the substantially half region connected to the expansion part cell 7 </ b> B on the lower side of the rear seat is on the front side of the intersection with the other gas pressure introduction path 14. It is blocked by the blocking part 17.

  In the case of the airbag bag body 101 of this embodiment, the deployment behavior of the non-inflatable portions 9A to 9D can be stabilized and the rigidity can be improved as in the above-described embodiment, and the one gas pressure introduction path 15 can be provided. By providing the blocking portion 17, the inflow direction of the high-pressure gas inside the bag body 101 can be controlled, and more accurate development can be realized. And since the obstruction | occlusion part 17 can be easily set by sewing of the bag body 1, it can implement | achieve the fine adjustment in a design step, and application to a different vehicle model easily, without causing a raise in manufacturing cost. .

FIG. 3 shows a third embodiment of the present invention.
The airbag bag body 201 of this embodiment has the same basic configuration as that of the first embodiment, but the intersection of one gas pressure introduction path 15 and the other gas pressure introduction path 14. Thus, the substantially half region on the expansion portion cell 7B side on the lower side of the rear seat is removed, so that the gas pressure introduction passages 14 and 15 form a substantially T shape as a whole. In this case, the non-expandable portion is configured by 209A, 209B, and 209C in the drawing.

  The airbag body 201 can basically obtain substantially the same effect as that of the first embodiment, but the substantially half region of the gas pressure introduction path 15 is removed from the first embodiment. Therefore, the volume of the entire auxiliary expansion part is reduced, and the development speed of the bag body can be increased accordingly.

FIG. 4 shows a fourth embodiment of the present invention.
The airbag bag body 301 of this embodiment is different from the first embodiment in that the second conduction path 13 (see FIG. 1) on the lower side connecting the front and rear inflating part cells 8C and 7B is removed. The shapes of the gas pressure introduction paths 314 and 315 constituting the auxiliary expansion part are different. One gas pressure introduction path 314 is formed in a substantially U shape and connects the upper expansion part cells 8A and 7A to each other, and the other gas pressure introduction path 315 is connected to the rear expansion part cell 7B on the lower side of the rear seat. A gas pressure introduction path 314 is connected. In this case, the non-expandable portion is constituted by 309A, 309B, and 309C in the drawing.

  Since the airbag body 301 is formed so that the substantially U-shaped gas pressure introduction path 314 is in parallel with the first conduction path 12 inside the blocks of the non-inflatable portions 309A to 309C, At the time of introduction, the gas pressure introduction path 314 can efficiently open and open the housing portion on the vehicle body side, and the deployment speed of the non-expandable portions 309A to 309C can be increased. Further, in the case of this airbag bag body 301, when high-pressure gas is introduced into the gas pressure introduction path 314, the inside of the non-inflatable portions 309A to 309C expands in a substantially U shape, and therefore toward the outer peripheral edge portion of the bag body. There is an advantage that the rigidity with respect to the load input increases.

FIG. 5 shows a fifth embodiment of the present invention.
The airbag bag body 401 of this embodiment includes a gas pressure introduction path 414 that connects the inflatable section cell 7A on the upper rear seat side and the inflatable section cell 8C on the lower front seat side, and an intermediate position between the gas pressure introduction paths 414. The non-expandable portions 409A, 409B, and 409C are separated by a gas pressure introduction passage 415 that curves upward and communicates with the expansion portion cell 8A on the front seat upper side, and further upwards from the expansion portion cell 7B on the lower rear seat side. A gas pressure introduction path 416 that is curved and communicates with the upper end of the gas pressure introduction path 414 is formed.

  The airbag body 401 urges early deployment of the lower part of the front seat by the gas pressure introduction passage 414 and reduces the residual pressure of the rear seat side inflatable cells 7A and 7B that complete deployment and inflation relatively early. The gas can be distributed to the expansion section cells 8A, 8B, and 8C on the front seat side via the gas pressure introduction paths 416, 414, and 415. Therefore, in this embodiment, the airbag bag body 401 can be deployed and inflated more quickly.

FIG. 6 shows a sixth embodiment of the present invention.
The airbag bag body 501 of this embodiment eliminates the second conduction path 13 (see FIG. 1) on the lower side of the first embodiment, and further includes the expansion portion cells 7A and 8C, 7B and 8A at diagonal positions. The lower end side of the gas pressure introducing passages 514 and 515 communicating with each other is curved so as to promote downward expansion and expansion. In this case, the non-expandable portion is configured by 509A to 509D in the drawing.

FIG. 7 shows a seventh embodiment of the present invention.
The airbag bag body 601 of this embodiment eliminates the second conduction path 13 (see FIG. 1) on the lower side of the first embodiment, and communicates with the inflatable cell 7A, 7B, 8A, 8C. 614 and 616 are connected to each other by a central annular gas pressure introduction path 618. In this case, the non-expandable portion is constituted by 609A to 609E in the drawing.

  Since the airbag body 601 has an annular gas pressure introduction path 618 formed in the center of the blocks of the non-inflatable portions 609A to 609E, the rigidity of the center side of the non-inflatable portions 609A to 609E is increased.

FIG. 8 shows an eighth embodiment of the present invention.
The airbag bag body 701 of this embodiment has gas pressure introduction channels 714 and 715 communicating with the rear seat side bulge portion cells 7A and 7B, and gas pressure introduction channels communicating with the front seat bulge portion cells 8A and 8C. The passages 716 and 717 are connected to each other, and these connecting portions are connected to each other by a horizontal gas pressure introduction passage 718 at a substantially central position in the vertical direction. In this case, the non-expandable portion is constituted by 709A to 709D in the drawing.

  In the airbag bag body 701, since the horizontal gas pressure introduction path 718 is formed at the center of the block of the non-inflatable portions 709A to 709D, the rigidity of the entire non-inflatable portions 709A to 709D in the front-rear direction is increased.

  In addition, this invention is not limited to the said embodiment, A various design change is possible in the range which does not deviate from the summary.

The front view of the airbag bag body which shows 1st Embodiment of this invention. The front view of the airbag bag body which shows 2nd Embodiment of this invention. The front view of the airbag bag body which shows 3rd Embodiment of this invention. The front view of the airbag bag body which shows 4th Embodiment of this invention. The front view of the airbag bag body which shows 5th Embodiment of this invention. The front view of the airbag bag body which shows 6th Embodiment of this invention. The front view of the airbag bag body which shows 7th Embodiment of this invention. The front view of the airbag bag body which shows 8th Embodiment of this invention.

Explanation of symbols

1, 101, 201, 301, 401, 501, 601, 701 ... Airbag bags 7A, 7B, 8A-8C ... Inflatable cell (inflatable part)
9A to 9D, 209A to 209C, 309A to 309C, 409A to 409C, 509A to 509D, 609A to 609E, 709A to 709D ... non-expandable part 14, 15 ... gas pressure introduction path (auxiliary expansion part)
16 ... relief valve

Claims (1)

A plurality of inflatable portions on the front seat side that expand by introduction of high-pressure gas, and a plurality of inflatable portions on the rear seat side,
A non-inflatable portion provided between the plurality of inflatable portions, into which high-pressure gas is not introduced,
In the airbag bag body that is attached to the side of the vehicle body in a folded state and is deployed between the vehicle body side wall and the occupant by introducing high-pressure gas at the time of a vehicle collision,
Forming a plurality of auxiliary inflatable portions at least partially inclined with respect to the unfolding direction of the bag body in the non-inflatable portion;
Fractionating the non-inflatable portion by arranging the plurality of auxiliary inflatable portions in a direction intersecting in the non-inflatable portion ;
An airbag bag body , wherein at least one pair of inflatable portions at diagonal positions on a front seat side and a rear seat side are electrically connected to each other via the auxiliary inflatable portion .

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