KR20090012740A

KR20090012740A - Passenger airbag module for a vehicle

Info

Publication number: KR20090012740A
Application number: KR1020070076835A
Authority: KR
Inventors: 김경열; 김진구; 임일상
Original assignee: 한국델파이주식회사
Priority date: 2007-07-31
Filing date: 2007-07-31
Publication date: 2009-02-04

Abstract

The present invention relates to a passenger seat airbag module for a vehicle, which can prevent injuries of occupants moved by inertia during an eccentric collision of the vehicle, and for a vehicle including an airbag cushion which can minimize cost increase due to the change of the shape of the airbag cushion. It is to provide a passenger seat airbag module.

Its technical composition A sensor that detects a collision with a vehicle detects a collision between an inflator, a high pressure gas filled therein, a housing in which the inflator is mounted, and a gas generated from the inflator is guided by a diffuser to cause a collision between a passenger and an instrument panel. A passenger seat airbag module including an airbag cushion that is inflated to prevent the airbag cushion, wherein the airbag cushion is formed to be symmetrical with respect to a center of the vehicle, and to increase the contact rate between the airbag cushion and the passenger, the airbag toward the outside of the vehicle. It is characterized by extending the cushion a predetermined length.

Description

Passenger Airbag Module for a Vehicle

1 is a front view schematically showing a passenger seat airbag module for a vehicle according to the prior art.

Figure 2 is a front view schematically showing a passenger seat airbag module for a vehicle according to the present invention.

Figure 3 is a front view schematically showing the airbag cushion of the passenger seat airbag module for a vehicle according to the present invention.

Figure 4 is a view showing an embodiment of an airbag cushion of the passenger seat airbag module for a vehicle according to the present invention.

5 is a vehicle test using a passenger seat airbag module for a vehicle according to the present invention.

The present invention relates to a passenger seat airbag module for a vehicle, and more particularly, to a passenger seat airbag module for increasing a contact rate of an airbag cushion and a passenger during an eccentric collision of a vehicle.

In general, an automobile is equipped with an airbag system, a safety device, to protect the occupant from shocks generated during a sudden stop or a collision while minimizing human injury.

Here, the airbag system is installed in the steering wheel or the instrument panel, the airbag cover is formed so that the deployment portion toward the occupant side, and the inflator (operator) is controlled by the input operation control signal to generate gas when the vehicle crashes (inflater) ), An airbag module composed of an airbag cushion folded inside the airbag cover to expand and expand through the deployment portion by the gas generated by the inflator, and when the driving speed is rapidly lowered and the gravity acceleration reaches the set value. And a shock sensor for generating a shock signal, and an electronic control unit (ECU) for exploding the primer of the inflator according to the shock signal.

The inflator includes a primer that is ignited by an operation control signal output from the electronic controller, and a gas generator that generates gas as the primer is ignited.

By such a configuration, the airbag module generates a predetermined signal by detecting a shock sensor when the driving speed is sharply lowered due to the frontal collision of the vehicle, and then recognizes the shock signal output from the shock sensor. The control device ignites the primer to combust the gas generating agent.

At this time, since the gas generating agent rapidly generates gas, the airbag cushion is rapidly inflated and deployed, and the airbag cushion thus deployed protects the passenger by preventing the occupant's face and chest from moving forward by the inertia. At the same time, since the impact energy is absorbed by the discharge of the gas expanded into the discharge hole formed in the airbag cushion, the impact force transmitted to the occupant in the event of a collision can be effectively buffered to reduce the injuries of the occupant.

1 is a front view schematically showing a passenger seat airbag module for a vehicle according to the prior art. As shown in the figure, the airbag cushion of the passenger seat airbag module is fixed to the center of the steering wheel, so that it is deployed by the gas flowing from the inflator installed inside the airbag cushion housing, the upper surface opened by the airbag cushion cover is wrapped, It is fixed to the inflator.

Furthermore, the airbag cushion has a plurality of tethers fixed to the inner circumferential surface of the rear before and after contact with the driver's body, and the tether is fixed to a predetermined shape and size of the front when the airbag cushion is deployed, thereby providing an airbag cushion. It prevents damage to the airbag cushion and injury to the occupant due to rapid inflation during deployment.

That is, the airbag cushion shape is symmetrically formed in the center portion, and since the center portion is installed to correspond to the gas ejection opening of the inflator, the high pressure gas concentrated on the center side of the airbag cushion during initial deployment is uniformly dispersed and ejected to the center portion.

However, due to inertia during the side collision of the vehicle, if the passenger is seated in an out of position (OOP), the shape of the preset airbag cushion is not appropriate, and the occupant moves toward the outboard direction of the vehicle and contacts the airbag cushion. There is a problem that may not be a part can cause a large injury to the face portion or head of the occupant, the instability of the occupant and the airbag cushion contact surface is increased.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a passenger seat airbag module including an airbag cushion that can prevent the injury of the occupant moved by inertia during the eccentric collision of the vehicle.

Another object of the present invention is to provide a passenger seat airbag module for a vehicle including an airbag cushion that can minimize the cost increase due to the change of the shape of the airbag cushion.

In order to achieve the above object, the present invention provides an inflator in which a high-pressure gas filled therein is ignited and discharged by a sensor for detecting a collision of a vehicle, a housing in which the inflator is mounted therein, and a gas generated in the inflator. A passenger seat airbag module comprising an airbag cushion which is led to a diffuser and is inflated to prevent a collision between a passenger and an instrument panel, wherein the airbag cushion is formed to be symmetrically about a center and has a contact rate between the airbag cushion and the passenger. In order to increase, it is characterized in that extending the airbag cushion a predetermined length in the outward direction of the vehicle.

And, the predetermined length is characterized in that 50mm.

Here, the outer direction is characterized in that the outboard direction.

In addition, the outboard direction is characterized in that the right.

In addition, the airbag cushion is formed to extend a predetermined length in the outward direction, characterized in that the airbag cushion is formed to extend to correspond to the contact portion of the head of the passenger.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view schematically showing a passenger seat airbag module for a vehicle according to the present invention. As shown in the drawings, the vehicle passenger seat airbag module according to the present invention is fixed to the center of the steering wheel, is installed inside the airbag cushion housing surrounding the upper surface opened by the airbag cushion cover, the airbag cushion housing inside It is fixed to be developed by the high pressure gas flowing from the installed inflator.

Here, the airbag cushion is typically formed of woven fibers selected from the group consisting of nylon, polyester and polyamide, and is installed in an expandable folded state to be deployed by high pressure gas.

The inside of the airbag cushion having such a structure is provided with a developing pressure distribution member which suppresses the initial development of the airbag cushion when the airbag cushion is deployed and evenly distributes the high pressure gas introduced into the airbag cushion.

In addition, the deployment pressure distribution member is fixed to the inner circumferential surface of the rear of the airbag cushion, the airbag cushion shape is in a state of being folded to expand to correspond to the shape deployed on the front, the material is also woven as described above It is preferably formed of fibers.

High pressure gas ejection holes are formed at both sides of the tether having such a structure, a burst joint is formed at the center portion, and is sealed by a sewing line in a state of being bent at the center portion, and when the deployed pressure of the airbag module is greater than the tension of the sewing line. It is preferable to rupture to adjust the deployment size so that the airbag cushion is not fully deployed at once upon deployment of the airbag cushion.

In other words, during the initial deployment of the airbag cushion, the deployment pressure is distributed to the side side, which is a portion other than the front portion of the airbag cushion in contact with the driver's body seated in the driver's seat, to prevent the front portion of the airbag cushion from projecting forwardly deployed. It is preferable to.

Here, by forming the airbag cushion shape to extend in the outboard direction, to increase the contact rate of the occupant and the shape of the airbag cushion that can injure the occupant seated in an abnormal posture (OOP) by the side impact, the vehicle collision Injury to passengers can be prevented.

On the other hand, during deployment of the airbag cushion, in order to maintain the shape of the airbag cushion, it is preferable to further include a tether of a predetermined length fixed to both the front portion and the inner peripheral portion of the rear portion of the airbag cushion.

By the tether, since the airbag cushion is deployed only by its length, the airbag cushion is changed to correspond to the airbag cushion which is changed to adjust the deployment size of the airbag cushion, and is a material that can withstand a relatively large load, for example, a material such as nylon or a piece of cloth. It is preferable to form.

Hereinafter, an operation process of the passenger seat airbag module for a vehicle according to the present invention will be described.

First, when a collision occurs while driving a vehicle, a high pressure gas is ejected from the inflator and flows into the airbag cushion to deploy the airbag cushion.

At this time, during the initial deployment of the airbag cushion, the high-pressure gas flows into the deployment pressure distribution member installed inside the airbag cushion, and the deployment pressure is suppressed by the sealed center portion. It is evenly distributed in both directions of the cushion.

Thus, when the developing pressure dispersing member is developed to a certain extent, when the developing pressure by the high pressure gas continuously ejected from the inflator is greater than the tension of the sewing line sealed at the central portion of the developing pressure dispersing member, the sewing line is torn off. As the central portion is unfolded, the high-pressure gas is blown to the front side of the airbag cushion by being torn along the rupture joint to gradually deploy the airbag cushion.

The deployment of the airbag cushion through this stepwise process is made by the length of the tether.

As a result, the side surface formed so as to extend in the outboard direction of the airbag cushion and the other side are developed in a convex shape than the front portion, and the front portion has a shape that protrudes relatively forward, so that the punch out phenomenon by the front portion It is possible to reduce the risk of injury to the occupant's face or head, even if the occupant is in an abnormal posture (OOP) due to the inertia caused by the frontal collision and the side collision.

3 is a front view schematically showing an airbag cushion of a passenger seat airbag module for a vehicle according to the present invention, which will be described with reference to FIG. 2. As shown in the figure, the vehicle passenger seat airbag module according to the present invention comprises an airbag cushion formed to extend in the outboard direction.

In this case, when the vehicle travels at a predetermined speed or more and collides with the front and side surfaces, the airbag cushion is inflated to prevent shock between the occupant and the instrument panel, thereby preventing the occupant from directly hitting the vehicle body.

In addition, the shape of the airbag cushion is formed to extend in the outboard direction, it is expanded by the gas pressure generated in the inflator is made to restrain the occupant even in the side impact and abnormal posture.

In addition, the airbag cushion is formed to sew a plurality of cloth to have an inlet and an inflation, and it is preferable to further form a discharge hole on both sides to prevent excessive inflation pressure of the gas from being delivered to the passenger when the airbag cushion is deployed. .

In addition, the inside of the inflating portion of the airbag cushion is further provided with a tether so as to be deployed in a predetermined direction, and is formed according to the shape of the airbag cushion according to the present invention, thereby limiting the length of the airbag cushion deployed to the front and side portions It is also desirable to change to fix.

Preferably, the airbag cushion extends about 50 mm in the outboard direction, extends to the right with the passenger's vehicle door, and is formed to extend in the outboard direction of the airbag cushion, and the other side is convex than the front part. Developed, and the front portion has a shape of relatively less protruding forward.

In addition, some of the incoming gas is discharged into the vehicle through discharge holes formed at both sides, thereby preventing excessive gas inflation pressure from being transferred to the occupant, and even if the occupant is biased to one side, The contact ratio can be increased by this.

Figure 4 is a view showing an embodiment of an airbag cushion of the passenger seat airbag module for a vehicle according to the present invention. As shown in the figure, the vehicle passenger seat airbag module according to the present invention comprises an airbag cushion formed to extend in the outboard direction.

Here, the shape of the airbag cushion is formed to extend in the outboard direction, it is expanded by the gas pressure generated by the inflator is made to restrain the occupant in the side impact and abnormal posture, but the cost of the increased fabric In order to minimize, the shape of the airbag cushion is formed to prevent the occupant's face and head from hitting the vehicle body such as (a), (b) and (c).

5 is a view showing a vehicle test using a passenger seat airbag module for a vehicle according to the present invention. As shown in the figure, the vehicle passenger seat airbag module according to the present invention is subjected to a real vehicle test.

First, (a) is developed to correspond to the protruding direction so that the airbag cushion prevents the protruding of the occupant in order to prevent the occupant from protruding forward by colliding forward.

(B) is a case of side impact, which is a case of hitting a fixed wall inclined approximately 30 degrees, the contact of the occupant and the airbag cushion due to the shaking of the vehicle is unstable, including the airbag cushion according to the present invention The vehicle airbag module is formed to extend in the outboard direction, thereby increasing the contact rate between the occupant and the airbag cushion, it is possible to increase the safety of the occupant.

(C) is an offset test in which a part of the vehicle collides, and a part of the vehicle collides with the fixed wall in the front, and thus, the contact between the occupant and the airbag cushion is unstable due to the shaking of the vehicle. The airbag module for a vehicle including the airbag cushion according to the present invention is formed to extend in the outboard direction, thereby increasing the contact rate between the occupant and the airbag cushion, thereby increasing the safety of the occupant.

In other words, by forming the airbag cushion shape to extend in the outboard direction, to increase the contact rate of the occupant and the shape of the airbag cushion that can injure the occupant seated in an abnormal posture (OOP) by the side impact, Injury to the occupants can be prevented in the event of a collision.

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited to this specific embodiment, and those skilled in the art within the scope described in the claims of the present invention Changes may be made as appropriate.

As described above, the present invention having the configuration as described above forms the airbag cushion shape to extend in the outboard direction, and thus the shape of the airbag cushion which may injure the occupant seated in an abnormal posture (OOP) due to side impact. Increase the contact rate of the passenger and the occupant, and reduce injuries to the occupant's face or head, even if the occupant is in an abnormal posture (OOP) due to inertia caused by frontal and side collisions, It is possible to minimize the cost increase caused by the shape change of the cushion.

Claims

A sensor that detects a collision with a vehicle detects a collision between an inflator, a high pressure gas filled therein, a housing in which the inflator is mounted, and a gas generated from the inflator is guided by a diffuser to cause a collision between a passenger and an instrument panel. A passenger seat airbag module comprising an airbag cushion that is inflated to prevent it,

The airbag cushion is formed to be symmetrical with respect to the center, the passenger seat airbag module, characterized in that extending the airbag cushion a predetermined length in the outward direction of the vehicle, in order to increase the contact rate of the passenger with the airbag cushion.

The method according to claim 1,

The passenger seat airbag module, characterized in that the predetermined length is 50mm.

The method according to claim 1,

The passenger seat airbag module, characterized in that the outer direction is the outboard direction.

The method according to claim 3,

The outboard direction of the vehicle passenger seat airbag module, characterized in that the right.

The method according to claim 1,

The airbag cushion is formed to extend a predetermined length in the outward direction, the passenger seat airbag module for the vehicle, characterized in that the extension is formed so as to correspond to the portion where the airbag cushion and the passenger's head contact.