JP3851067B2 - Head protection airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a head protection airbag device mounted on a vehicle.
[0002]
[Prior art]
As one of this type of head protection airbag device, an airbag stored along a roof side rail has a gas introduction passage at the upper edge, and gas is supplied through a gas distribution pipe disposed in the gas introduction passage. There is one in which the airbag is inflated and deployed in a curtain shape along the side wall of the passenger compartment to protect the occupant's head by the gas supplied from the supplier to the expansion chamber. For example, International Publication No. 98/22313, It is shown in Japanese Laid-Open Patent Publication No. 11-301394 and Japanese Patent Laid-Open No. 11-314555.
[0003]
[Problems to be solved by the invention]
By the way, in the above-described conventional head protection airbag device, the opening position and the opening direction of the gas outlet provided in the gas distribution pipe are set in the same direction with respect to the expansion chamber of the airbag. For this reason, each site | part (for example, site | part corresponding to a door glass part, and site | part corresponding to a pillar garnish part) cannot be expand | deployed in the optimal direction.
[0004]
[Means for Solving the Problems]
In order to cope with the above-mentioned problems, the present invention has a gas supply device through a gas distribution pipe disposed in the gas introduction passage in the airbag housed along the roof side rail having a gas introduction passage at the upper edge. In the head protection airbag device in which the airbag is inflated and deployed in a curtain shape along the side wall of the passenger compartment to protect the occupant's head by the gas supplied to the expansion chamber from the gas, the gas in the gas distribution pipe The opening position and the opening direction of the outlet are different in the circumferential direction of the gas distribution pipe for each part of the airbag (invention according to claim 1).
[0005]
In this case, the opening position and the opening direction of the gas outlet are made different in the circumferential direction of the gas distribution pipe according to the deployment resistance of the interior material when the bag is deployed (the invention according to claim 2), or the gas It is desirable that the opening position and the opening direction of the outflow port be different in the circumferential direction of the gas distribution pipe between a portion corresponding to the door glass portion and a portion corresponding to the pillar garnish portion (invention according to claim 3). In carrying out the invention according to claim 3, the opening direction of the gas outlet at the portion corresponding to the door glass portion is a direction intersecting the door glass surface, and the gas flow at the portion corresponding to the pillar garnish portion It is desirable that the opening direction of the exit is a direction over the pillar garnish (the invention according to claim 4).
[0006]
[Operation and effect of the invention]
In the head protection airbag device according to the present invention, normally, the airbag is stored along the roof side rail in a folded state, and the airbag expansion chamber is used when the vehicle collides or rolls over. Gas is supplied from the gas supply device through the gas distribution pipe, and the airbag is inflated and deployed in a curtain shape along the side wall of the passenger compartment. At this time, in the airbag, the inflated portion is inflated and deployed toward the head protection inflating area located on the side of the head of the occupant by the gas supplied from the gas supplier.
[0007]
By the way, in this invention (invention which concerns on Claim 1), the opening position and opening direction ( opening direction toward the inside of an airbag) of the gas outflow port in gas distribution piping are the said gas distribution piping for every site | part of an airbag. Different in the circumferential direction. Therefore, the gas supplied from the gas outlet in the gas distribution pipe can be opened in the direction in which the airbag is to be deployed for each part, and the deployment direction can be optimized for each part of the airbag. Can do.
[0008]
In the present invention (the invention according to claim 2), the opening position and the opening direction of the gas outlet in the gas distribution pipe are set in the circumferential direction of the gas distribution pipe according to the expansion resistance of the interior material when the bag is deployed. Are different. Therefore, gas in a large amount by directing an opening position and the opening direction of the gas outlet to the site to site development resistance of the airbag is large, and the opening of the gas outlet is at a site development resistance of the air bag is small By avoiding the position and the opening direction from the part, it is possible to supply a small amount of gas, the airbag can be deployed substantially uniformly, and the deployment time of the airbag can be shortened.
[0009]
Further, in the present invention (invention according to claim 3), the opening position and the opening direction of the gas outlet in the gas distribution pipe are determined by the portion corresponding to the door glass portion and the portion corresponding to the pillar garnish portion. Different in the circumferential direction of the piping. For this reason, it is possible to accurately supply gas to the portion corresponding to the door glass portion and the portion corresponding to the pillar garnish portion in the airbag, and the inflatability of the airbag can be improved.
[0010]
In the present invention (the invention according to claim 4), the airbag can be deployed along the door glass surface at a portion corresponding to the door glass portion, and the door glass portion and the passenger head Even when the distance from the part is narrow, the airbag can be interposed accurately. In addition, the airbag can be deployed in a direction over the pillar garnish at a portion corresponding to the pillar garnish, and the airbag can be prevented from being caught on the pillar garnish.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The head protection airbag device 10 according to the present invention shown in FIGS. 1 and 2 is inflated and deployed in a curtain shape along the side wall of the passenger compartment, and is seated corresponding to the front seat S1 (the B pillar 23). ) And the airbag 11 protecting the passenger's head seated in the rear front seat S2 (seat disposed corresponding to the C pillar 24), and gas in the airbag 11 And a gas distribution pipe 13 that distributes the gas supplied from the inflator 12 to the respective expansion chambers R <b> 1 to R <b> 7 of the airbag 11.
[0012]
The airbag 11 is formed by applying a coating for airtightness to a base fabric (woven fabric) (it can also be performed without a coating for airtightness maintenance), as shown in FIG. 1 and FIG. The front seat expansion portion 11b and the rear seat expansion portion 11c are provided on the front and rear sides of the non-expansion portion 11a, the front seat expansion portion 11b is provided with a non-expansion portion 11d, and the rear seat expansion portion 11c. A non-inflatable portion 11e is provided at the rear side. The airbag 11 is assembled to the roof side rail 21 and the A pillar (front pillar) 22 by a plurality of attachment pieces (not shown) provided at the upper edge.
[0013]
The front seat inflating portion 11b protects the head of the front seat occupant from the side during inflating and deploying, and the four inflating chambers R1 to R4 and a gas introduction passage P1 communicating these at the upper edge. have. The rear-seat inflatable portion 11c protects the head of the rear front seat occupant from the side during inflation and deployment, and is connected to the three expansion chambers R5 to R7 at the upper edge portion. It has P2. The rear gas introduction passage P2 is open at the rear end, and communicates with the front gas introduction passage P1 through the central gas introduction passage P3 at the front end.
[0014]
The airbag 11 having the above configuration is stored along the A pillar 22 and the roof side rail 21 in a state in which the airbag 11 is folded so as to be deployable by bellows fold, roll fold, or the like (which can be implemented by combining both folds). Thus, the lower edge portion is covered by the elastically deformable A-pillar garnish 32 and the peripheral edge portion of the elastically deformable roof head lining 31.
[0015]
The inflator 12 supplies gas to the airbag 11 in the event of a side collision or rollover of the vehicle. The inflator 12 is disposed along the roof side rail 21 and includes brackets and bolts (both not shown). ) And is attached to the gas distribution pipe 13 in an airtight manner. The inflator 12 is covered with the peripheral edge of the roof head lining 31 together with the rear end of the gas distribution pipe 13.
[0016]
As shown in FIGS. 2 and 3, the gas distribution pipe 13 is closed at the front end and hermetically connected to the inflator 12 at the rear end, and introduces each gas through the rear end opening of the rear gas introduction passage P2. It is inserted into the passages P1, P2, P3 and is hermetically sealed from the rear end opening of the gas introduction passage P2. The gas distribution pipe 13 includes gas outlets 13 a to 13 g corresponding to the expansion chambers R <b> 1 to R <b> 7 of the airbag 11.
[0017]
The gas outlets 13a, 13b and 13e, 13f are opened toward the expansion chambers R1, R2 corresponding to the front door glass portion 41 and the expansion chambers R5, R6 corresponding to the central door glass portion 42, respectively. As shown in FIG. 4 by taking the gas outlet 13e as an example, the opening position and the opening direction of the gas outlet 13e are the directions intersecting the door glass surface G (see the arrow direction in FIG. 4).
[0018]
On the other hand, the gas outlets 13c, 13d and 13g are opened toward the expansion chambers R3 and R4 corresponding to the B pillar garnish 33 and the expansion chamber R7 corresponding to the C pillar garnish 34, respectively. As shown in FIG. 5, the opening position and the opening direction are directions to get over the C pillar garnish 34 (see the arrow direction in FIG. 5).
[0019]
In the head protection airbag device 10 of the present embodiment configured as described above, the airbag 11 is normally stored along the A pillar 22 and the roof side rail 21 in a state where the airbag 11 is folded. The A pillar garnish 32 and the periphery of the roof head lining 31 are covered.
[0020]
Further, in the event of a side collision or rollover of the vehicle, a gas is ejected from the inflator 12, and this gas is folded through the gas distribution pipe 13 and supplied to the respective expansion chambers R1 to R7 of the airbag 11. Then, the airbag 11 deforms the corresponding portions of the roof head lining 31 and the A pillar garnish 32 toward the vehicle interior and deploys downward, and as shown in FIG. It expands and expands into a shape. At this time, in the airbag 11, each of the inflating portions 11 b and 11 c is inflated and deployed toward the head protection inflating area located on the side of the head of each occupant.
[0021]
By the way, in the present embodiment, the opening positions and the opening directions of the gas outlets 13a to 13g in the gas distribution pipe 13 are set to portions corresponding to the door glass portions 41 and 42 (the expansion chambers R1 and R2 of the airbag 11 and R5 and R6) and the portions corresponding to the pillar garnish portions 33 and 34 (portions where the inflation chambers R3, R4 and R7 of the airbag 11 are provided) differ in the circumferential direction of the gas distribution pipe 13. It is. Moreover, in the portions corresponding to the door glass portions 41 and 42, the opening directions of the gas outlets 13a, 13b and 13e, 13f in the gas distribution pipe 13 are set to intersect the door glass surface G.
[0022]
For this reason, in the part corresponding to each door glass part 41 and 42, as illustrated in FIG. 4, the airbag 11 can be deployed along the door glass surface G, and each door glass can be deployed. Even when the distance between the portions 41 and 42 and the heads of the passengers is narrow, the airbag 11 can be accurately interposed. Further, as illustrated in FIG. 5, the airbag 11 can be deployed in a direction over the pillar garnish 33, 34 at a portion corresponding to each pillar garnish portion 33, 34. Sometimes, part of the airbag 11 can be prevented from entering the gap between the upper ends of the pillar garnishes 33 and 34 and the pillars 23 and 24, and the airbag 11 can be prevented from being caught on the pillar garnishes 33 and 34. .
[0023]
In the above embodiment, the inflator 12 is provided at the rear end of the gas distribution pipe 13. However, as shown in FIG. 6, the inflator 12 may be provided in the middle part of the gas distribution pipe 13. is there. In this case, gas can be supplied from the inflator 12 to the inflating portions 11b and 11c of the airbag 11 almost simultaneously and quickly, and the inflating and deploying time of both inflating portions 11b and 11c can be shortened. In the embodiment shown in FIG. 6, a tension belt 14 is employed instead of the front non-inflatable portion 11 d in the airbag 11.
[0024]
Moreover, in the said embodiment, let the opening direction of gas outflow port 13a, 13b and 13e, 13f in the gas distribution pipe 13 be the direction which cross | intersects the door glass surface G, and let the opening direction of gas outflow port 13c, 13d and 13g be the direction. Although the present invention has been implemented in a direction that crosses the pillar garnish 33, 34, in the present invention, if the opening position and the opening direction of the gas outlet in the gas distribution pipe are made different in the circumferential direction of the gas distribution pipe for each part of the airbag. For example, the opening position and the opening direction of the gas outlet may vary depending on the deployment resistance of the interior material when the bag is deployed (the roof head lining 31 whose deployment resistance is increased by the assist grip 35 as shown in FIG. 4). It is also possible to carry out by varying the circumferential direction of the distribution pipe.
[0025]
If the opening position and the opening direction of the gas outlet in the gas distribution pipe are made different in the circumferential direction of the gas distribution pipe for each part of the airbag, the airbag can be opened in the direction in which each part is desired to be deployed. The deployment direction can be optimized for each part of the airbag. Also, when the opening position and opening direction of the gas outlet are varied in the circumferential direction of the gas distribution pipe according to the deployment resistance of the interior material when the bag is deployed (the size of the gas outlet can be varied at the same time) ), The gas outlet has a large deployment resistance by directing the opening position and direction of the gas outlet toward the part, and the gas outlet has a small part. By avoiding the opening position and the opening direction from the part, it is possible to supply a small amount of gas, so that the airbag can be deployed substantially uniformly, and the deployment time of the airbag can be shortened.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a head protecting airbag device according to the present invention.
FIG. 2 is an enlarged side view of the head protecting airbag device shown in FIG.
3 is an enlarged perspective view of the inflator and gas distribution pipe shown in FIGS. 1 and 2. FIG.
4 is an enlarged cross-sectional view taken along line 4-4 of FIG.
5 is an enlarged cross-sectional view taken along line 5-5 of FIG.
6 is a side view corresponding to FIG. 2, showing another embodiment of the head protecting airbag device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Head protection airbag apparatus, 11 ... Air bag, 11a ... Center non-inflatable part, 11b ... Front seat inflatable part, 11c ... Rear seat inflatable part, 11d, 11e ... Non-inflatable part, R1-R7 ... Inflate Chamber, P1 to P3 ... Gas introduction passage, 12 ... Inflator (gas supply), 13 ... Gas distribution pipe, 13a-13g ... Gas outlet, 21 ... Roof side rail, 22 ... A pillar, 23 ... B pillar, 24 ... C pillar, 31 ... Roof head lining, 32 ... A pillar garnish, 33 ... B pillar garnish, 34 ... C pillar garnish, 41, 42 ... Door glass part, G ... Door glass surface.

Claims (4)

The airbag stored along the roof side rail has a gas introduction passage at the upper edge portion, and the airbag is supplied by the gas supplied from the gas supplier to the expansion chamber through the gas distribution pipe disposed in the gas introduction passage. In the head protection airbag device, in which the airbag is inflated and deployed in a curtain shape along the side wall of the passenger compartment to protect the head of the occupant, the opening position and the opening direction of the gas outlet in the gas distribution pipe are defined in the airbag. A head protection airbag device characterized in that it is varied in the circumferential direction of the gas distribution pipe for each part. 2. The head protection airbag device according to claim 1, wherein an opening position and an opening direction of the gas outlet are varied in a circumferential direction of the gas distribution pipe according to a deployment resistance of the interior material when the airbag is deployed. A head protecting airbag device characterized by the above. 2. The head protection airbag device according to claim 1, wherein an opening position and an opening direction of the gas outlet are a circumferential direction of the gas distribution pipe in a portion corresponding to the door glass portion and a portion corresponding to the pillar garnish portion. A head protection airbag device characterized in that the head protection airbag device is different. The head protection airbag device according to claim 3, wherein an opening direction of the gas outlet at a portion corresponding to the door glass portion is a direction intersecting the door glass surface, and a portion corresponding to the pillar garnish portion. The head protecting airbag device according to claim 1, wherein an opening direction of the gas outlet port is a direction over the pillar garnish.

Images