KR102005748B1 - Curtain airbag of vehicle - Google Patents

Abstract

The present invention relates to a curtain airbag for an automobile, which is provided in a state of being folded adjacent to a roof of an automobile and is deployed downward between an inner side of a vehicle and a passenger in the event of a collision of an automobile, And a guide chamber connected to the main chamber and deployed at an upper portion of the space between the pillars and the pillar trim so as to avoid interference between pillars and pillar trim of the automobile upon deployment of the main chamber A non-inflated non-inflated region is provided between the guide chamber and the main chamber so as to prevent an increase in the total expansion thickness due to the overlap between the main chamber and the guide chamber during deployment, By preventing the main chambers from overlapping with each other, It is possible to securely protect the head and the upper body of the occupant by accurately positioning it in the set deployment area.

Description

[0001] CURTAIN AIRBAG OF VEHICLE [0002]

The present invention relates to a curtain airbag of an automobile, and more particularly, to a curtain airbag of an automobile which is inflated between an occupant and an inner surface of the automobile in a collision of the automobile to protect the occupant.

In general, a vehicle airbag device is a safety device for protecting an occupant by injecting gas into an airbag in response to a signal from an impact sensor in the event of an automobile collision, thereby rapidly inflating the airbag.

An inflatable safety restraint such as an airbag is mandatory in most new cars. The airbag is typically installed as part of a system with a steering wheel on the driver's side of the vehicle and an airbag module in the instrument panel. In the event of a car crash, the sensor inside the car measures the abnormal deceleration and triggers the ignition of the load in the inflator.

Gas expanding from the load travels through the conduit to burn the airbag, which immediately inflates in front of the driver and occupant thereby protecting the driver and occupant from dangerous collisions inside the vehicle. Normally, the airbag is installed in the trim of the vehicle so as not to be visible during normal vehicle operation.

Airbag systems have also been developed that provide similar protection between the interior side of the vehicle and the occupant to protect against side impacts of the vehicle. Such a situation occurs when another vehicle collides with the side of the vehicle, or when the side of the vehicle repeatedly collides with the ground. Side impact airbags are often referred to as inflatable curtain airbags. Many curtain airbags are housed along corners where the roof of the car meets the side windows and fillers. Such a curtain airbag can be accommodated behind the headliner trim at the edge of the headliner, which is a fabric covering the roof of an automobile.

Recent safety standards, published by governments around the world, call for greater protection in the face of frontal or frontal collisions. There is also a continuing need to provide an airbag system that is economical in manufacturing and installation, and that allows automakers to avoid interference in deploying various features within a vehicle and that can be deployed quickly. It is desirable to provide an airbag system that provides protection against impact over a wide range of occupant locations as the occupants of the vehicle can be in any of a variety of locations within the vehicle at deployment of the airbag.

On the other hand, the vehicle body is provided with a filler as a steel framework that forms the door frame of the door. When applied to a car body for a passenger car, the filler can be divided into a front pillar, a center pillar, and a rear pillar according to installation positions.

The fillers are attached to a pillar trim (or Garnish) that protects the appearance and serves as a decorative feature.

The pillow trim is provided adjacent to the lower portion of the head lining on which the above-mentioned curtain airbag is mounted.

Accordingly, when the air cushion of the curtain airbag is deployed, a phenomenon occurs in which the pillar trim located at the lower portion of the head lining interferes with the deployment of the curtain airbag.

For example, when the curtain airbag is deployed between the pillar portion and the filler portion when the curtain airbag is deployed, there is a problem that the curtain airbag performance is not exhibited smoothly.

In order to solve such a problem, a pillar ramp or a guide chamber for guiding the curtain airbag not to be caught between pillars and pillars is newly installed.

For example, Patent Document 1 and Patent Document 2 disclose a curtain airbag technique in which the filler lamp or the guide chamber is installed.

Patent Document 1 discloses a filler lamp assembly for a vehicle that prevents a curtain airbag from being caught by a filler trim by applying a filler lamp to a filler of an automobile.

Patent Document 2 discloses a side curtain airbag structure in which a guide chamber is provided at the upper end of a curtain airbag so that the curtain airbag is deployed downward along a guide chamber to prevent it from being caught by a filler trim.

U.S. Patent No. US 7967332 (published on June 28, 2011) Korean Patent Publication No. 10-2011-0037598 (published on April 13, 2011)

1 is a cross-sectional view of a curtain airbag to which a guide chamber is applied in accordance with the prior art.

1, when the guide chamber 2 is provided at the upper end of the curtain airbag 1, the guide chamber 2 of the curtain airbag 1 in the event of an automobile collides with the filler 4 of the automobile, As the main chamber 3 is deployed between the treads 5, the main chamber 3 is deployed to the inside of the vehicle while being guided by the upper surface of the guide chamber 2.

At this time, the upper portion of the main chamber 3 overlaps with the guide chamber 2.

Thus, the main chamber 3 is deployed in an inward direction and a downward direction of the vehicle as the upper end portion is disposed at a position protruding inwardly of the vehicle by the thickness of the guide chamber 2. [

Thus, when the curtain airbag is deployed inclinedly inward and downward of the vehicle, the lower end of the curtain airbag is disposed at a position higher than the lower end position of the predetermined deployment area for protecting the occupant's head and upper body.

Accordingly, the curtain airbag according to the related art can not cover the entire development area when the guide chamber is applied, and thus the upper body of the occupant can not be safely protected.

SUMMARY OF THE INVENTION An object of the present invention is to provide a curtain airbag of an automobile which can be inflated between an occupant and an inner surface of the automobile in the event of a collision of an automobile to protect the occupant.

Another object of the present invention is to provide a curtain airbag of an automobile in which a thickness of a main chamber and a guide chamber of a curtain airbag are minimized so that the main chamber is inflated downward along the inner side of the automobile to safely protect the occupant .

In order to achieve the above object, the curtain airbag of the automobile according to the present invention is provided in a state of being folded adjacent to a roof of an automobile and is deployed downward between the inner side of the vehicle and the occupant when the automobile collides, A main chamber including an outer panel facing the side of the vehicle and an interior panel facing the occupant, a main chamber connected to the main chamber and adapted to prevent interference of the filler and filler trim of the vehicle upon deployment of the main chamber, A non-inflated non-inflated region is provided between the guide chamber and the main chamber so as to prevent an increase in the total expansion thickness due to the superposition of the main chamber and the guide chamber upon deployment .

The guide chamber is formed in a rectangular shape in section, the lower end of the guide chamber is fixed to the vehicle body, and the upper end of the guide chamber is developed while being rotated downward.

Wherein the guide chamber is formed in a rectangular shape in its cross section, and an installation area fixed to the vehicle body is formed along a horizontal direction at a central portion of the guide chamber, and a lower end portion of the guide chamber, And is expanded while rotating downward about the mounting region at the time of unfolding.

And an incision is formed in a lower edge of the guide chamber.

And the upper end of the guide chamber is provided below the upper end of the gas introduction part for introducing the gas into the main chamber.

As described above, according to the curtain airbag of the automobile according to the present invention, when the automobile collides, the curtain airbag is deployed while avoiding interference with the filler and the filler trim to securely protect the head and the upper body of the occupant Loses.

Particularly, according to the present invention, a non-inflated region is provided between the guide chamber and the main chamber to prevent the guide chamber and the main chamber from overlapping with each other, thereby minimizing the thickness increase due to the overlap, It is possible to obtain an effect that it can be accurately positioned.

Thus, according to the present invention, it is possible to prevent the lower end of the curtain airbag from being disposed at a position higher than the lower end position of the deployment area owing to the overlap with the guide chamber, and thus the head and upper body of the occupant can be safely protected.

Further, according to the present invention, it is possible to reduce the manufacturing cost by reducing the amount of material used for providing the guide chamber by disposing the guide chamber close to the main chamber and minimizing the non-expansion region.

1 is a sectional view of a curtain airbag to which a guide chamber is applied,
2 is a view showing a state where a curtain airbag of an automobile according to a preferred embodiment of the present invention is housed in a structure of an automobile,
FIG. 3 is a view showing a state in which the curtain airbag shown in FIG. 2 is deployed;
4 is a cross-sectional view taken along the line B-B 'shown in Fig. 3,
5 is a view showing an unfolded state of a curtain airbag of a vehicle according to another embodiment of the present invention,
FIG. 6 is a cross-sectional view taken along the line D-D 'shown in FIG. 5,
Fig. 7 is a view of the guide chamber shown in Figs. 3 and 5 in comparison with the guide chamber; Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a curtain airbag for an automobile according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In this specification, reference symbol F denotes the front of the automobile to which the curtain airbag of the present invention is applied, reference symbol R denotes the rear of the automobile, reference symbol U denotes the upper side of the automobile and reference symbol L denotes the lower side of the automobile. Reference I denotes the inner direction of the vehicle in the width direction of the vehicle, and reference reference symbol O denotes the outer direction of the vehicle in the width direction of the vehicle. The front and rear (F, R) directions of the automobile can be expressed in the horizontal direction, and the up and down (U, L) directions of the automobile can be expressed in the vertical direction.

(I, O) direction, that is, the width direction axis is the X axis, and the front and rear (F, R) direction axes of the automobile are the Y axis define.

FIG. 2 is a view showing a state where a curtain airbag of an automobile according to a preferred embodiment of the present invention is housed in a structure of an automobile, and FIG. 3 is a view showing the developed state of the curtain airbag shown in FIG.

The curtain airbag of the automobile according to the preferred embodiment of the present invention is mounted in the roof side rail 1 of the vehicle in the folded or wrapped state, as shown in Figs.

Generally, the roof side rail 1 is covered with a loop trim and is not visible from the interior of the vehicle.

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

These fillers may include a front filler 3, a center filler 5 and a rear filler 7, and a D-filler 8 provided on the rear side of the rear filler 7 in order of the front rotor of the automobile.

The curtain airbag 30 is formed into a bag shape by a sewing or a one-piece woven method of the outer panel 31 and the inner panel 33 to be described later.

The curtain airbag 30 is connected to an inflator 9 for generating gas.

When a side collision or overturn of the automobile occurs, a sensor (not shown) provided to the automobile first detects the impact, and an ignition signal is transmitted to the inflator 9. [ The gas 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 side of the vehicle to protect the occupant. Accordingly, the curtain airbag 30 can simultaneously protect the front seat 21 and the passengers of the center seat 22 and the rear seat 23. [

Of course, the present invention can be modified to simultaneously protect the occupants of the front seat 21 and the rear seat 23 by using one curtain airbag 30 in a vehicle in which only the front seat 21 and the rear seat 23 are applied. have.

The curtain airbag 30 may have a front protection area A1, a central protection area A2 and a rear protection area A3 at the time of inflation.

The front protection area A1 can entirely cover the side surfaces of the vehicle from the front pillar 3 of the vehicle to the center pillar 5 of the vehicle and the center protection area A2 can cover the side surfaces of the vehicle from the center pillar 5 And the rear protection area A3 can cover the side surfaces of the vehicle from the rear filler 7 of the automobile to the D-pillar 9 of the automobile as a whole have.

In the present embodiment, the front, center and rear protection zones A1, A2, and A3 are referred to as a main chamber 36 in order to distinguish them from the guide chambers 40 to be described below.

The curtain airbag 30 has a bag shape that defines an inflatable space therein by the upper and lower walls 321 and 322 and the front and rear walls 323 and 324.

The front protection area A1 of the curtain airbag 30 is defined by the chamber walls 341 and 342 to define a plurality of the front chambers C1 and C2 and the central protection area A2 to the chamber wall 343 A plurality of central chambers C4 and C5 are defined by the chamber wall 344 and one or more rear chambers C6 can be defined by the chamber wall 344 in the rear protective region A3.

The front chamber C3 of the front protection area is substantially in contact with the head of the occupant seated on the front seat 21 and the central chamber C5 of the central protection area A2 is in contact with the center The head of the occupant seated on the seat 22 is substantially in contact and the rear chamber C6 of the rear protection area A3 is substantially in contact with the head of the occupant seated on the rear seat 23. [

The above-described upper, lower, front and rear walls 321 to 324 and chamber walls 341 to 344 are formed by sewing the inner and outer panels 33 and 31 of the curtain airbag 30, . ≪ / RTI >

The upper, lower, front and rear walls 321 to 324 and the chamber walls 341 to 344 may be formed by various suitable methods such as adhesive, RF welding, ultrasonic welding, and the like.

A gas introducing portion 35 through which the gas is introduced from the inflator 9 may be provided at an upper portion of a portion where the front protection region A1 and the central protection region A2 are connected.

Here, as the amount of gas delivered from the inflator 9 is limited, it is possible to prevent the frontal, central and rear protection zones A1 to A3 of the curtain airbag 30 from being inflated using a limited amount of gas, Non-inflated regions 36 to 38 may be provided at the front upper portion of the region A1, between the front protection region A1 and the central protection region A2, and at the central portion of the rear protection region A3, respectively.

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

The guide chamber 40 is provided on the upper portions of the center 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 rotated while the upper end of the guide chamber 40 is rotated downward.

A gas supply unit 41 may be provided at the front end of the guide chamber 40 to receive a portion of the gas introduced into the central protection zone A2 through the gas introduction unit 35. [

Thus, the guide chamber 40 can receive the gas through the gas supply part 41 and can be deployed in a substantially cylindrical shape between the filler and the filler trim.

The guide chamber 40 is deployed in the space between the rear filler 7 and the filler trim as viewed in FIG. 3 when the curtain airbag 30 is deployed, so that the main chamber 36 is guided by the guide chamber 40, Along the upper surface of the vehicle.

4 is a cross-sectional view taken along the line B-B 'shown in FIG.

3 and 4, the guide chamber 40 and the main chamber overlap each other between the guide chamber 40 and the upper ends of the center and rear protection zones A2 and A3 of the main chamber, The non-inflated non-inflated region 42 may be provided.

Here, as the lower end of the guide chamber 40 is fixed to the vehicle body, the guide chamber 40 is deployed downward when deployed.

The unexpanded region 42 is provided between the guide chamber 40 and the main chamber 36 so that the unexpanded region 42 is superimposed on the inside of the guide chamber 40 which is deployed downward, 36 are inflated and deployed at a lower portion than the lower end of the guide chamber 40.

Therefore, the present invention prevents the guide chamber and the main chamber from overlapping each other, so that the main chamber can be accurately positioned in the predetermined deployment area for protecting the passenger.

Accordingly, the present invention prevents the lower end of the curtain airbag from being disposed at a position higher than the lower end position of the deployment area due to overlap with the guide chamber, thereby safely protecting the head and the upper body of the occupant.

On the other hand, in the present embodiment, by providing the guide chamber and the non-inflated region on the upper portion of the main chamber, the amount of material used for manufacturing the curtain airbag is increased.

Therefore, the present invention can be modified to reduce the manufacturing cost by changing the shape of the guide chamber.

For example, FIG. 5 is a developed view of a curtain airbag of an automobile according to another embodiment of the present invention, and FIG. 6 is a sectional view taken along the line D-D 'shown in FIG.

As shown in FIGS. 5 and 6, the guide chamber 50 may have a substantially rectangular cross-section having a height that is longer than the height of the guide chamber 40 shown in FIG.

A gas introducing portion 51 is provided at the front end of the guide chamber 50 and a nonexpanded region 52 is provided between the center and rear protective regions A2 and A3 of the guide chamber 50 and the main chamber 36 .

At least one mounting area 55 may be provided in the center of the guide chamber 50 along the horizontal direction so as to be installed on the vehicle body.

Herein, the guide chamber 50 is folded about the installation area 55 in the folding process of the curtain airbag 30, so that the incision 56 can be formed along the lower end edge of the guide chamber 50 have.

The lower end portion 54 of the guide chamber 50 is folded so as to overlap the inside of the upper end portion 53 and is rotated downward about the mounting region 55 as shown in Figure 6 when the curtain airbag 30 is deployed And is deployed below the upper end 53 of the guide chamber 50.

Thus, as the lower end 54 of the guide chamber 50 is deployed between the pillars and the pillar trim, the curtain airbag 30 can be deployed downward along the inner side of the vehicle, avoiding the interference of the filler and filler trips. have.

FIG. 7 is a view showing the guide chambers shown in FIGS. 3 and 5 in comparison with the guide chambers shown in FIGS.

7, the guide chamber 50 according to another embodiment of the present invention may be provided at a position lower by a certain distance h than the upper end of the guide chamber 40 shown in FIG. 3 .

And the lower end portion 54 of the guide chamber 50 may be provided at the non-inflated region 42 portion shown in Fig. Thus, the height and area of the non-inflated region 52 can be minimized.

To this end, the upper end portion 53 of the guide chamber 50 may be provided at a position lower than the gas introducing portion 35 for introducing the gas into the curtain airbag 30.

Thus, the present invention prevents the guide chamber and the main chamber from overlapping each other, thereby minimizing an increase in thickness due to superimposition, thereby accurately positioning the curtain airbag in a predetermined deployment area.

Accordingly, the present invention prevents the lower end of the curtain airbag from being disposed at a position higher than the lower end position of the deployment area due to overlap with the guide chamber, thereby safely protecting the head and the upper body of the occupant.

Further, the present invention can reduce the manufacturing cost by disposing the guide chamber close to the main chamber and minimizing the non-inflated area, thereby reducing the amount of material used for providing the guide chambers.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to a curtain airbag technology of an automobile which protects a passenger by deploying a curtain airbag while avoiding interference with pillars and pillars of a vehicle in the event of a collision of an automobile.

1: Side rail 3: Front pillar
5: center pillar 7: rear pillar
8: D filler 9: Inflator
21 to 23: front, center and rear seats
30: curtain airbag 31, 33: outer, inner panel
321 to 324: upper, lower, front and rear walls
341 to 344: chamber wall 35: gas inlet
36: Main chambers 37 to 39: Unexpanded regions
40, 50: Guide chambers 41, 51: Gas supply section
42, 52: unexpanded regions 53, 54: upper and lower ends of the guide chamber
55: Installation area 56: Section improvement

Claims (5)

A main chamber which is provided in a state of being folded adjacent to the roof of the vehicle and which is deployed downwardly between the inner side of the vehicle and the passenger of the vehicle at the time of collision of the vehicle and has an outer panel facing the side of the vehicle, Wow
And a guide chamber connected to the main chamber and deployed on an upper portion of the space between the pillars and the pillar trim so as to avoid interference with pillars and pillar trim of the automobile when the main chamber is deployed,
A non-inflated non-inflated region is provided between the guide chamber and the main chamber so as to prevent an increase in total expansion thickness due to overlap of the main chamber and the guide chamber upon deployment,
The guide chamber has a rectangular cross section,
A mounting region fixedly installed on a vehicle body is formed along a horizontal direction at a central portion of the guide chamber,
The lower end of the guide chamber is folded so as to overlap the inner surface of the upper end of the guide,
And is deployed while being rotated downward about the installation area at the time of development,
Wherein a curved portion is formed at the lower end edge of the guide chamber. delete delete delete The method according to claim 1,
Wherein an upper end of the guide chamber is provided below an upper end of a gas introduction part for introducing gas into the main chamber.

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