KR102320375B1 - Curtain airbag apparatus of vehicle - Google Patents

Abstract

A curtain airbag device for a vehicle, which is provided in a folded state adjacent to the roof of the vehicle and deployed downward between the inner side of the vehicle and occupants when the vehicle collides, and the curtain airbag generates gas upon collision of the vehicle An inflator for supplying the airbag is provided, and the curtain airbag is provided with a configuration in which an extension part surrounding the folded curtain airbag is formed. And it is possible to prevent damage due to interference with the fixing bolt.

Description

Curtain airbag device for automobiles {CURTAIN AIRBAG APPARATUS OF VEHICLE}

The present invention relates to a curtain airbag device for a vehicle, and more particularly, to a curtain airbag for a vehicle that is inflated between an occupant and an inner surface of the vehicle to protect the occupant during a collision.

The automobile airbag device is a safety device that protects occupants by rapidly inflating the airbag by injecting gas into the airbag according to a signal from an impact sensor in the event of a vehicle collision.

Among the airbag devices of the vehicle, the curtain airbag device is installed along the entire side of the roof liner portion of the vehicle to protect the occupant from the impact applied to the side of the vehicle.

The curtain airbag device is housed along the corner where the roof of the vehicle meets the side windows and pillars. Curtain airbags like this can be housed behind the headliner trim at the edge of the headliner, the fabric that covers the roof of the vehicle.

Meanwhile, structures or parts having various shapes and uses, such as pillars and brackets, are installed on the vehicle body.

The following Patent Documents 1 and 2 disclose a curtain airbag technology capable of avoiding interference with structures or parts installed on a vehicle body.

Patent Document 1 describes a configuration of a pillar lamp assembly for an automobile in which a pillar lamp is applied to a pillar of an automobile to prevent the curtain airbag from being caught in the pillar trim.

Patent Document 2 describes a configuration of a side curtain airbag in which a guide chamber is provided at the upper end of the curtain airbag to deploy the curtain airbag downward along the guide chamber to prevent it from being caught in a pillar trim.

US Patent No. US 7967331 (issued June 28, 2011) Korean Patent Publication No. 10-2011-0037598 (published on April 13, 2011)

On the other hand, in recent years, a bracket for fixing the curtain airbag to the vehicle body according to the vehicle body shape, standard, and specifications is sometimes disposed below the folded curtain airbag or inflator.

As such, when the bracket is disposed under the curtain airbag or the inflator, interference occurs between the fixing bolt for fixing the bracket to the vehicle body and the curtain airbag during the deployment process of the curtain airbag, there is a problem in that the surface of the curtain airbag is damaged. .

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and to provide a curtain airbag device for a vehicle that can prevent damage to the curtain airbag due to interference with a fixing bolt fixing a bracket to the vehicle body during the deployment process of the curtain airbag. will provide

In order to achieve the above object, the curtain airbag device for a vehicle according to the present invention is provided in a folded state adjacent to the roof of the vehicle, and is deployed downward between the inner side of the vehicle and the occupants when the vehicle collides. and an inflator that generates gas upon collision of a vehicle and supplies it to the curtain airbag, wherein the curtain airbag wraps the folded curtain airbag to prevent interference with a bracket and fixing bolts for fixing the curtain airbag to the vehicle body when inflated It is characterized in that an extension is formed.

As described above, according to the curtain airbag device for a vehicle according to the present invention, an extension portion is formed to extend upward from the upper wall of the curtain airbag, and when the curtain airbag is inflated, the bracket and bolt for fixing the curtain airbag to the vehicle body are wrapped around the contacting part. The effect of preventing damage due to interference with brackets and fixing bolts is obtained.

In addition, according to the present invention, a partial extension is formed from the front end of the guide chamber to the front to surround the part in contact with the bracket and the fixing bolt for fixing the inflator to the vehicle body when the curtain airbag is inflated, resulting in damage caused by interference between the bracket and the fixing bolt. The effect of being able to prevent is obtained.

Accordingly, according to the present invention, it is possible to eliminate product defects caused by damage to the curtain airbag and to stably protect the occupants in an accident such as a vehicle collision.

1 is a view showing a state in which the curtain airbag of the vehicle is stored in the structure of the vehicle;
2 is an exemplary view showing a damaged state due to interference with a bracket installed on the lower part of the inflator;
3 is an exploded view of a curtain airbag applied to a curtain airbag device for a vehicle according to a preferred embodiment of the present invention;
4 is an exploded view of a curtain airbag applied to a curtain airbag device for a vehicle according to another embodiment of the present invention;
5 is an enlarged view of part A shown in FIG.

Hereinafter, a curtain airbag device for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In this specification, reference numeral F denotes the front of a vehicle to which the curtain airbag of the present invention is applied, reference numeral R denotes the rear of the vehicle, reference numeral U denotes the top of the vehicle, and reference numeral L denotes the bottom of the vehicle. Reference numeral I denotes the interior direction of the vehicle in the width direction of the vehicle. The front and rear (F, R) directions of the vehicle may be expressed in a horizontal direction, and the up and down (U, L) directions of the vehicle may be expressed in a vertical direction.

First, when the bracket is installed under the curtain airbag, a process in which the curtain airbag is damaged due to interference with the fixing bolt for fixing the bracket to the vehicle body during deployment of the curtain airbag will be described.

1 is a view showing a state in which a curtain airbag of a vehicle is accommodated in a structure of the vehicle.

In general, a curtain airbag of a vehicle is mounted in a roof side rail 1 of a vehicle in a folded or rolled state as shown in FIG. 1 .

The roof side rail 1 is covered with a roof trim so that it is not visible from the inside of the vehicle.

A plurality of pillars supporting the roof are connected to the roof side rail 1 .

These pillars include a front pillar 3, a center pillar 5, and a rear pillar 7 in turn from the front of the vehicle, and, if necessary, a D pillar 8 provided on the rear side of the rear pillar 7 may include more.

The curtain airbag 30 is formed in a bag shape by sewing or a one-piece woven method of an outer panel in contact with the inner side of the vehicle and an inner panel disposed inside the outer panel.

An inflator 9 for generating gas is connected to the curtain airbag 30 .

When a side collision or rollover of the vehicle occurs, first, a sensor (not shown) provided in the vehicle senses the impact, and an ignition signal is transmitted to the inflator 9 . The igniter in the inflator 9 is ignited to generate gas, and the gas generated from the inflator 9 is supplied into the curtain airbag 30 .

Upon receiving gas from the inflator 9, the curtain airbag 30 inflates and deploys downward along the inner surface of the vehicle to protect the occupants. Accordingly, the curtain airbag 30 can simultaneously protect the occupants of the front seat 21 , the center seat 22 , and the rear seat 23 .

Meanwhile, a plurality of brackets for fixing the curtain airbag and the inflator to the vehicle body are installed on the inner side surface of the vehicle to be spaced apart from each other.

For example, FIG. 2 is an exemplary view showing a damaged state due to interference with a bracket installed under the inflator.

The bracket 10 may be installed under the curtain airbag 30 or the inflator 9 as shown in FIG. 2 according to various types of vehicle body shape, specifications, specifications, and the like.

The curtain airbag 30 is folded to deploy downward while rotating along the inner side surface of the vehicle body when inflated.

Therefore, when the bracket 10 and the fixing bolt 11 are disposed under the curtain airbag 30 or the inflator 9, the bracket 10 or the fixing bolt 11 is used in the process of deploying the curtain airbag 30. As the interference occurs, there is a problem in that a partial area D of the surface of the curtain airbag 30 is damaged.

Hereinafter, an area damaged due to interference with the bracket 10 and the fixing bolt 11 when the curtain airbag is deployed is referred to as a 'damaged area (D)'.

In order to solve this problem, the present invention prevents damage due to interference between the curtain airbag and the bracket and fixing bolts by changing the shape of a portion disposed under the inflator in the curtain airbag.

Next, a configuration of a curtain airbag device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 and 3 .

In this embodiment, the configuration of the curtain airbag device shown in FIG. 1 will be described.

3 is an exploded view of a curtain airbag applied to a curtain airbag device according to a preferred embodiment of the present invention.

As shown in FIGS. 1 and 3 , the curtain airbag 30 applied to the curtain airbag device of a vehicle according to a preferred embodiment of the present invention includes a front protection area A1, a central protection area A2 and It may have a rear protection area A3.

The front protection area A1 may entirely cover the lateral surfaces of the motor vehicle from the front pillar 3 of the motor vehicle to the center pillar 5 of the motor vehicle, and the central protection area A2 extends from the center pillar 5 of the motor vehicle to the motor vehicle. The lateral surfaces of the vehicle from the rear pillar 7 of the vehicle can be covered entirely, and the rear protection area A3 can completely cover the lateral surfaces of the vehicle from the rear pillar 7 of the vehicle to the D pillar 8 of the vehicle. have.

In this embodiment, the front, center and rear protection areas A1, A2, and A3 are referred to as a main chamber 36 in order to distinguish them from the guide chamber 40 to be described with reference to FIG. 4 below.

The curtain airbag 30 has a bag shape defining an inflatable space therein by upper and lower walls 311 and 312 and front and rear barriers 313 and 314 .

The front, center and rear protection areas A1 of the curtain airbag 30 may be defined by at least one chamber wall, respectively, into a plurality of front, center and rear chambers.

In the event of a collision of a vehicle, for example, a side collision, the front chamber of the front protection area A1 is in substantially contact with the head of an occupant seated on the front seat 21 , and the central chamber of the center protection area A2 is in contact with the center seat 22 . ), the head of the occupant seated on the rear seat 23 substantially contacts the rear chamber of the rear protection area A3 .

The above-described upper, lower, front and rear walls 311 to 314 and chamber walls may be formed by sewing the inner and outer panels of the curtain airbag 30 or weaving in a one-piece woven manner.

Alternatively, the upper, lower, front, rear barriers 311 to 314 and the chamber walls may be formed by various suitable methods such as adhesive, RF welding, ultrasonic welding, and the like.

In addition, a gas introduction part 35 through which gas is introduced from the inflator 9 may be provided at an upper end of a portion where the front protection area A1 and the central protection area A2 are connected.

Here, as the amount of gas delivered from the inflator 9 is limited, the front protection can be used to inflate the front, center, and rear protection areas A1 to A3 of the curtain airbag 30 using a limited amount of gas. Non-expandable areas 36 to 38 may be provided in the upper portion of the front side of the area A1 , between the front protection area A1 and the central protection area A2 , and at the center of the rear protection area A3 , respectively.

Of course, the present invention is not limited to the above-described shape of the curtain airbag 30, and it should be noted that the shape of the curtain airbag 30 may be changed according to various conditions such as the number of rows and the position and number of pillars of the seat.

Meanwhile, the curtain airbag 30 may further include an extension portion 50 extending upward from the upper wall 311 to prevent damage due to interference with the bracket 10 and the fixing bolt 11 .

The extension part 50 is provided on the upper wall 311 of the curtain airbag 30 so as to completely surround the portion in contact with the bracket 10 and the fixing bolt 11 when the curtain airbag 30 is inflated in a folded state. 10) may be formed to extend to a height corresponding to the upper end.

That is, the extension portion 50 includes not only the fixing bolt 11 for fixing the bracket 10 to the vehicle body, but also the step portion and the edge of the bracket 10 located on the inner panel side of the curtain airbag 30 . ) It functions to protect the curtain airbag 30 by preventing interference with the overall burr that may interfere during deployment.

As described above, according to the present invention, an extension portion is formed to extend upward from the upper wall of the curtain airbag, and when the curtain airbag is inflated, the portion in contact with the bracket and bolt for fixing the curtain airbag to the vehicle body is wrapped to prevent damage due to interference between the bracket and the fixing bolt. can be prevented

Meanwhile, in the present embodiment, it has been described that the extension is formed to extend upwardly from the upper wall as a whole, but the present invention is not necessarily limited thereto.

4 is an exploded view of a curtain airbag applied to a curtain airbag device for a vehicle according to a preferred embodiment of the present invention, and FIG. 5 is an enlarged view of part A shown in FIG. 4 .

In another embodiment of the present invention, as shown in FIGS. 1 and 4 , the curtain airbag 30 is similar to the configuration of the curtain airbag shown in FIG. 3 , and thus, the same configuration as the configuration described in the above embodiment is described. A duplicate description is omitted.

However, in the present embodiment, the curtain airbag 30 may further include a guide chamber 40 for avoiding interference with a pillar and a pillar trim when the curtain airbag 30 is deployed.

The guide chamber 40 may be provided on upper portions of the central and rear protection areas A2 and A3 and may have a substantially rectangular cross-section.

As the lower end of the guide chamber 40 is fixed to the vehicle body, the guide chamber 40 may be deployed while rotating so that the upper end faces downward during deployment.

A gas supply unit 41 may be provided at the front end of the guide chamber 40 to branch and receive some of the gas introduced into the central protection area A2 through the gas introduction unit 35 .

Therefore, the guide chamber 40 may receive gas through the gas supply unit 41 and may be deployed in a substantially cylindrical shape between the pillar and the pillar trim.

Accordingly, when the curtain airbag 30 is deployed, as the guide chamber 40 is deployed above the pillar, the space between the rear pillar 7 and the pillar trim as seen in FIG. 1 , the main chamber 36 is the guide chamber 40 . along the upper surface of the vehicle, it is deployed downwards inside the vehicle.

As shown in FIGS. 4 and 5, the guide chamber 40 configured in this way has a part to prevent damage due to interference with the bracket 10 and the fixing bolt 11 for fixing the inflator 9 to the vehicle body. An extension 51 may be formed.

The partial extension 51 may be formed to extend forward so as to overlap the front end of the inflator 9 from the front end of the guide chamber 40 . Thus, the partial extension part 51 may extend forward from the guide chamber 40 to partially overlap the gas introduction part 35 and the gas supply part 41 .

In addition, the extension 50 may be formed to extend upwardly from the upper end of the guide chamber 40 .

As described above, according to the present invention, a partial extension is formed to extend forward from the front end of the guide chamber, and when the curtain airbag is inflated, the bracket for fixing the inflator to the vehicle body and the portion in contact with the fixing bolt are wrapped, thereby causing damage due to interference between the bracket and the fixing bolt. can prevent

As a result of the deployment test of the curtain airbag device configured as described above, damage occurred in the extended part 50 or the partially extended part 51 , but the curtain airbag 30 was damaged by the extended part 50 or the partially extended part 51 . It was protected and it was confirmed that there was no damage.

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

The present invention is applied to a curtain airbag device technology for a vehicle that prevents damage to a curtain airbag caused by interference with a bracket and a fixing bolt installed on a vehicle body during a vehicle collision.

1: side rail 3: front pillar
5: Center pillar 7: Rear pillar
8: D pillar 9: Inflator
10: Bracket 11: Fixing bolt
21 to 23: front, center, rear seats
30: curtain airbags 31 to 34: top, bottom, front, rear wall
35: gas inlet 36: main chamber
40: guide chamber 41: gas supply
50: extension 51: partial extension
D: damage area

Claims (6)

A curtain airbag provided in a folded state adjacent to the roof of the vehicle and deployed downward between the inner side of the vehicle and the occupants in the event of a collision with the vehicle;
and an inflator that generates gas when a vehicle collides and supplies it to the curtain airbag,
In the curtain airbag, an extension part surrounding the folded curtain airbag is formed to prevent interference with the fixing bolt and the bracket for fixing the curtain airbag to the vehicle body when inflated;
The curtain airbag includes a guide chamber deployed in the upper part of the space between the pillar and the pillar trim to avoid interference with the pillar and the pillar trim of the vehicle when deployed,
A curtain airbag device for a vehicle, characterized in that the guide chamber has a partially extended portion extending forward so as to prevent damage due to interference with a bracket and a fixing bolt for fixing the inflator to the vehicle body. According to claim 1,
The curtain airbag device for a vehicle according to claim 1, wherein the extension portion extends from an upper wall of the curtain airbag to a height corresponding to the upper end of the bracket so as to surround a portion in contact with the bracket and the fixing bolt when the curtain airbag is deployed. delete 3. The method of claim 1 or 2,
The curtain airbag device for a vehicle, characterized in that the partially extended portion extends forward so as to overlap the front end of the inflator from the front end of the guide chamber. 5. The method of claim 4,
The curtain airbag device for a vehicle, wherein the partial extension portion extends forwardly from the guide chamber and partially overlaps with a gas introduction portion through which gas is introduced into the curtain airbag from the inflator. 5. The method of claim 4,
The curtain airbag device for a vehicle, characterized in that the partially extended portion extends upwardly from the upper end of the guide chamber.

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