KR20240068439A - Air bag device - Google Patents

Abstract

The present invention relates to an airbag device that reduces the risk of injury to passengers and improves crash performance by improving the opening and closing operability of the LRD vent. The present invention includes an airbag cushion formed with an LRD vent; An opening and closing panel whose end is fixed to the inner surface of the airbag cushion, is folded into a shape that does not cover the LRD vent, and the folded portion is tack-welded to the airbag cushion; It is connected between the airbag cushion and the opening/closing panel by bypassing the LRD vent, and tension is created by the force of the airbag cushion expanding, pulling the opening/closing panel toward the LRD vent, and the opening/closing panel is released by pulling the opening/closing panel. An airbag device including a tether that closes the LRD vent by unfolding the panel in a shape that covers the LRD vent is introduced.

Description

Air bag device {Air bag device}

The present invention relates to an airbag device that reduces the risk of injury to passengers and improves crash performance by improving the opening and closing operability of the LRD vent.

Airbags are installed inside the vehicle to protect passengers from shock that occurs when the vehicle crashes.

For example, the passenger airbag (PAB) is installed inside the cockpit or dashboard located in front of the passenger seat. When a collision is detected in the vehicle, the airbag cushion tears through the cockpit or dashboard and inflates toward the passenger. It unfolds.

Accordingly, the passenger in the front seat is restrained by the airbag cushion to protect the passenger from the impact of the vehicle.

Meanwhile, in order to prevent injuries to passengers due to the pressure of the airbag cushion being deployed when the passenger airbag is activated, low risk deployment (LRD) regulations are being evaluated.

For example, the LRD vent structure that can adjust the pressure of the airbag cushion is applied to the passenger airbag.

In other words, the internal pressure of the airbag cushion is reduced by keeping the LRD vent open at the beginning of the airbag cushion's deployment, and by closing the LRD vent when the airbag cushion is fully deployed, the internal pressure of the airbag cushion is maintained to prevent collision injuries to passengers. reduces the risk.

However, structurally, there are many cases where the LRD vent is not completely closed when the airbag cushion is fully opened, which causes the gas inside the cushion to leak out of the cushion through the LRD vent, which causes the internal pressure of the airbag cushion to be insufficient. There is an issue that adversely affects crash performance.

The matters described as background technology above are only for the purpose of improving understanding of the background of the present invention, and should not be taken as recognition that they correspond to prior art already known to those skilled in the art.

KR 10-1708203 B KR 10-1355144 B KR 10-2015-0115500 A

The present invention was developed to solve the problems described above, and its object is to provide an airbag device that reduces the risk of injury to passengers and improves crash performance by improving the opening and closing operability of the LRD vent.

The configuration of the present invention for achieving the above object is an airbag cushion formed with an LRD vent; An opening and closing panel whose end is fixed to the inner surface of the airbag cushion, is folded into a shape that does not cover the LRD vent, and the folded portion is tack-welded to the airbag cushion; It is connected between the airbag cushion and the opening/closing panel by bypassing the LRD vent, and tension is created by the force of the airbag cushion expanding, pulling the opening/closing panel toward the LRD vent, and the opening/closing panel is released by pulling the opening/closing panel. The panel may be characterized as including a tether that opens in a shape to cover the LRD vent and closes the LRD vent.

An LRD vent is located between the point where the tether is fixed to the airbag cushion and the opening and closing panel; The opening and closing panel can be folded along the longitudinal direction toward the LRD vent.

The opening/closing panel may be placed adjacent to the LRD vent.

The middle part of the tether can be tack-welded to the inner surface of the airbag cushion to bypass the LRD vent.

A spare portion is formed extending toward the LRD vent at the folded portion of the opening and closing panel; An open hole with a larger diameter than the LRD vent is formed in the spare portion so that the open hole overlaps the LRD vent; The tether is connected to the spare part so that the spare part can be pulled by the tether.

The opening and closing panel can be folded into a roll shape or a folding shape.

The tether may be connected to an opening/closing panel adjacent to the tack joint.

Through the above-mentioned problem solving means, the present invention maintains the LRD vent in an open state at the beginning of airbag deployment, and mechanically closes the LRD vent by the tether 300 and the opening/closing panel 200 in the process of the airbag being fully opened. , it has the advantage of effectively reducing injuries to passengers by improving the opening and closing operability of the LRD vent.

1 is a view showing the initial deployment shape of the airbag cushion of the first embodiment of the present invention.
Figure 2 is a view showing the internal shape of the airbag cushion of Figure 1 in full bloom.
Figure 3 is a view showing the initial deployment shape of the airbag cushion of the second embodiment of the present invention.
Figure 4 is a view showing the initial deployment shape of the airbag cushion of the third embodiment of the present invention.
Figure 5 is a view showing the initial deployment shape of the airbag cushion of the fourth embodiment of the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Figure 1 is a diagram showing the initial deployment shape of the airbag cushion of the first embodiment of the present invention, and Figure 2 is a diagram showing the internal shape of the airbag cushion of Figure 1 in full bloom.

Referring to the drawings, the airbag device of the present invention includes an airbag cushion 100 on which an LRD vent 110 is formed; An opening and closing panel (200) whose end is fixed to the inner surface of the airbag cushion (100), is folded into a shape that does not cover the LRD vent (110), and the folded portion is tack-welded to the airbag cushion (100); It is connected between the airbag cushion 100 and the opening and closing panel 200, bypassing the LRD vent 110, and tension is formed by the force of the airbag cushion 100 expanding, so that the opening and closing panel ( 200, the tether 300 opens and closes the LRD vent 110 by pulling the opening and closing panel 200, and the tether 210 is released and the opening and closing panel 200 unfolds to cover the LRD vent 110. ); It is composed of:

For example, the airbag cushion 100 may be an airbag cushion applied to the passenger seat, but may also be applied to a driver's seat airbag in an autonomous vehicle in which the steering wheel is hidden or removed.

The LRD vent 110 is a vent hole formed on both sides of the airbag cushion 100 to implement LRD performance. Since the opening and closing panel 200 is in a folded state avoiding the LRD vent 110, the opening and closing panel 200 cannot be unfolded. Until it is exhausted, the gas inside the airbag cushion (100) is discharged to the outside through the LRD vent (110).

In addition, the opening and closing panel 200 is formed of the same material as the airbag cushion 100, the end is fixed to the inner surface of the airbag cushion 100, and some or all of the remaining parts of the opening and closing panel 200 are folded, and the folded portion It is tack-welded to the inner surface of this airbag cushion (100).

Here, the tack welding method can be implemented through sewing, and the fixation level of the tack welded part must be at a level where the tack welded part can fall due to the tension formed in the tether 300.

In addition, the opening/closing panel 200 must be formed to have an area at least larger than the inner diameter of the LRD vent 110 so that it can cover and block the LRD vent 110.

One end of the tether 300 is fixed to the inner surface of the airbag cushion 100, and the other end is fixed to the opening and closing panel 200, and serves to pull the opening and closing panel 200 during the deployment process of the airbag cushion 100.

According to this configuration, at the initial stage of deployment of the airbag cushion 100, the volume of the airbag cushion 100 is not large, so the tether 300 is not pulled, so the tether 300 is in a loose state without tension.

Accordingly, since the tether 300 does not pull the opening and closing panel 200, the folded portion of the opening and closing panel 200 maintains a tack-welded state, so the gas inside the airbag cushion 100 is vented to the outside through the LRD vent 110. As it is discharged, the passenger is protected from the strong deployment pressure at the initial stage of deployment of the airbag cushion 100.

However, at the point when the airbag cushion 100 is fully opened, the tether 300 is pulled in the direction in which the airbag cushion 100 is deployed, so that the opening and closing panel 200 fixed to the tether 300 opens the LRD vent 110. are pulled towards.

Accordingly, the LRD vent 110 is blocked by the opening and closing panel 200, thereby maintaining the internal pressure of the airbag cushion 100, and the airbag cushion 100 is rapidly expanded and deployed, thereby improving crash performance.

In addition, in the present invention, the LRD vent 110 is located between the point P where the tether 300 is fixed to the airbag cushion 100 and the opening and closing panel 200; The opening and closing panel 200 can be folded along the longitudinal direction toward the LRD vent 110.

Specifically, the LRD vent 110 is formed on the side of the airbag cushion 100.

And, the fixing point where the tether 300 is fixed to the airbag cushion 100 is located at the bottom of the airbag cushion 100 facing the passenger.

In addition, the opening and closing panel 200 is fixed to the side of the airbag cushion 100 that extends in a straight line from the fixing point through the LRD vent 110, and is folded and unfolded toward the LRD vent 110.

Therefore, when the opening and closing panel 200 is pulled by the tether 300, the folded portion of the opening and closing panel 200 unfolds and blocks the LRD vent 110, thereby improving the closing operability of the LRD vent 110. do.

In addition, the opening/closing panel 200 may be placed adjacent to the LRD vent 110.

That is, although it is normal for the tether 300 to tear all of the tack welded portion 210 sewn to the opening and closing panel 200 due to the force pulling the opening and closing panel 200, the tack weld portion 210 is sewn with a strong fixing force. In this case, only part of the tack welded part may be torn.

In this case, the folded portion of the opening and closing panel 200 is not completely unfolded. As the opening and closing panel 200 is unfolded at a position adjacent to the LRD vent 110, the LRD vent 110 can be opened even through the partially unfolded opening and closing panel 200. ) can be sufficiently covered to maintain internal pressure.

Meanwhile, in the present invention, the middle portion of the tether 300 can be tack-welded to the inner surface of the airbag cushion 100 to bypass the LRD vent 110.

That is, at the beginning of the deployment of the airbag cushion 100, the gas inside the airbag cushion 100 must be discharged to the outside through the LRD vent 110. When the tether 300 blocks the LRD vent 110, the tether 300 The exhaust flow of gas is interrupted by the area that blocks the LRD vent (110).

Accordingly, by tack welding part of the tether 300 to the inner surface of the airbag cushion 100 so as not to interfere with the LRD vent 110, gas can be discharged more smoothly through the LRD vent 110.

However, when the airbag cushion 100 is in full bloom, the part that tacks the tether 300 is torn, thereby forming tension in the tether 300 and pulling the opening and closing panel 200.

Meanwhile, Figure 3 is a diagram showing the initial deployment shape of the airbag cushion of the second embodiment of the present invention.

Referring to the drawing, a spare portion 220 is formed extending toward the LRD vent 110 at the folded portion of the opening and closing panel 200; An open hole 230 having a larger diameter than the LRD vent 110 is formed in the spare part 220 so that the open hole 230 overlaps the LRD vent 110; The tether 300 is connected to the spare part 220, and the spare part 220 is pulled by the tether 300.

At this time, the margin 220 is partially tack-welded to the inner surface of the airbag cushion 100, so that the open hole 230 and the LRD vent 110 can be positioned in an overlapping state.

Accordingly, in the initial stage of deployment of the airbag cushion 100, the tether 300 does not pull the slack portion 220 and the folded portion of the opening and closing panel 200 maintains a tack-welded state, so the LRD vent 110 and the opening hole ( The gas inside the airbag cushion 100 is discharged to the outside through 230).

However, at the point when the airbag cushion 100 is in full bloom, the spare part 220 fixed to the tether 300 is pulled toward the LRD vent 110.

Accordingly, the LRD vent 110 is blocked by the opening/closing panel 200 including the margin 220, thereby maintaining the internal pressure of the airbag cushion 100.

Meanwhile, Figure 4 is a diagram showing the initial deployment shape of the airbag cushion of the third embodiment of the present invention, and Figure 5 is a diagram showing the initial deployment shape of the airbag cushion of the fourth embodiment of the present invention.

Referring to the drawings, the opening and closing panel 200 may be folded into a roll shape or a folded shape.

That is, the opening and closing panel 200 can be rolled up in a roll shape, zigzag folded, or folded in half, and the folded state can be sewn in a form that is temporarily fixed by a tack welding method.

In addition, the tether 300 may be connected to the opening and closing panel 200 adjacent to the tack welding portion 310.

For example, at least one tether 300 may be connected between the opening and closing panel 200 and the airbag cushion 100.

As shown in Figure 5, when both sides of the opening and closing panel 200 are tacked to the airbag cushion 100 and only one tether 300 is connected to the opening and closing panel 200, the tether 300 is connected to the opening and closing panel 200. It can be connected to the midpoint of the end of .

However, as shown in Figure 4, when both sides of the opening and closing panel 200 are tack-welded to the airbag cushion 100 and two tethers 300 are connected to the opening and closing panel 200, each tether 300 is connected to the opening and closing panel. (200) It can be connected adjacent to the tack joints on both sides.

Therefore, the tension formed in the tether 300 applies a pulling force to both sides of the welded portion 210 at the same time, so that the welded portion 210 is more easily torn, thereby quickly closing the LRD vent 110. I do it.

Hereinafter, the opening and closing operation of the LRD vent 110 will be described with reference to the attached drawings.

When the passenger airbag is activated due to a vehicle collision, gas is injected into the airbag cushion 100 at the beginning of the airbag deployment, as shown in FIG. 1, and the airbag cushion 100 rapidly expands and deploys.

At this time, since the force to inflate the airbag cushion 100 is not provided to the tether 300, the tether 300 does not pull the opening and closing panel 200, so the LRD vent 110 remains open, Accordingly, until the airbag cushion 100 is fully opened, gas is discharged through the LRD vent 110 to lower the internal pressure.

Subsequently, as shown in FIG. 2, after the initial deployment of the airbag cushion 100, tension is provided to the tether 300 by the force of the airbag cushion 100 inflating in the process of fully unfolding the airbag cushion 100. .

In this state, one end of the tether 300 is fixed to the inner surface of the passenger side of the airbag cushion 100, and the other end of the tether 300 is fixed to the opening and closing panel 200 on the opposite side of the airbag cushion 100 to the passenger, so that the tether ( The tether 300 pulls the opening and closing panel 200 by the tension provided to 300.

Then, the folded opening and closing panel 200 unfolds toward the LRD vent 110. As the opening and closing panel 200 is provided adjacent to the LRD vent 110, the opening and closing panel 200 quickly opens the LRD vent 110. and stably covers it to block the discharge of gas through the LRD vent (110).

Accordingly, the internal pressure of the airbag cushion 100 is maintained until the passenger is loaded into the airbag cushion 100, thereby improving crash performance.

As described above, the present invention maintains the LRD vent 110 in an open state at the beginning of airbag deployment, and mechanically opens the LRD vent 110 by the tether 300 and the opening/closing panel 200 in the process of fully opening the airbag. By closing it, the opening and closing operability of the LRD vent 110 is improved and injuries to passengers can be effectively reduced.

Meanwhile, although the present invention has been described in detail only with respect to the above-mentioned specific examples, it is clear to those skilled in the art that various changes and modifications are possible within the technical scope of the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims. .

100: Airbag cushion
110: LRD vent
200: Opening/closing panel
210: tack welding part
220: spare part
230: open hole
300: Tether
310: tack welding part
P: fixed point

Claims (7)

Airbag cushion with LRD vent;
An opening and closing panel whose end is fixed to the inner surface of the airbag cushion, is folded into a shape that does not cover the LRD vent, and the folded portion is tack-welded to the airbag cushion;
It is connected between the airbag cushion and the opening and closing panel by bypassing the LRD vent, and tension is formed by the force of the airbag cushion expanding, pulling the opening and closing panel toward the LRD vent, and the tack welded part is released by the pulling of the opening and closing panel, opening and closing. An airbag device including a tether that closes the LRD vent by spreading the panel in a shape that covers the LRD vent. In claim 1,
An LRD vent is located between the point where the tether is fixed to the airbag cushion and the opening and closing panel;
The airbag device is characterized in that the opening and closing panel is folded along the longitudinal direction toward the LRD vent. In claim 2,
An airbag device, characterized in that the opening and closing panel is disposed adjacent to the LRD vent. In claim 1,
An airbag device wherein the middle portion of the tether is tack-welded to the inner surface of the airbag cushion to bypass the LRD vent. In claim 1,
A spare portion is formed extending toward the LRD vent at the folded portion of the opening and closing panel;
An open hole with a larger diameter than the LRD vent is formed in the spare portion so that the open hole overlaps the LRD vent;
An airbag device characterized in that the tether is connected to the spare part and the spare part is pulled by the tether. In claim 1,
An airbag device, characterized in that the opening and closing panel is folded in a roll or folding form. In claim 1,
The airbag device is characterized in that the tether is connected to an opening and closing panel adjacent to the tack joint.

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