KR20090092063A - Passenger airbag module for a vehicle - Google Patents

Abstract

A passenger airbag module for a vehicle is provided to prevent a passenger contacting airbag cushion before the airbag cushion is deployed. A passenger airbag module for a vehicle is comprised of an inflator, a housing, an air bag cushion(10), an auxiliary fixed member(20). The inflator ejects a high pressure gas from a signal applied by an impact perception sensor. The inflator is mounted inside the housing. The air bag cushion prevents collision between passenger and instrument panel. The air bag cushion is arranged to be symmetrical from a central part(C). In the central part, the auxiliary fixed member is adhered. The phenomenon-contacting the auxiliary fixed member in the early unfolding of the air bag cushion the air bag cushion is the passenger seat passenger is prevented.

Description

Passenger Airbag Module for a Vehicle

The present invention relates to a passenger seat airbag module for a vehicle. In particular, in the event of a collision and collision of a vehicle, the cushion may be prevented from coming into contact with the passenger seat before the cushion of the airbag module is fully deployed. It relates to a passenger seat airbag module for preventing in advance.

In general, a vehicle is equipped with an airbag system (Safety Bag) that is a safety device to minimize the damage to the occupants by protecting the occupant from the impact generated during a sudden stop or a collision and collision while driving.

Here, the airbag system is installed inside the steering wheel or the instrument panel, the airbag cover (airbag cover) is formed so that the deployment portion toward the occupant side, and the operation is controlled by the input operation control signal to the gas collision and collision Airbag module consisting of an inflator for generating a, an airbag cushion folded inside the airbag cover to expand and expand through the deployment by the gas generated by the inflator, and the acceleration of gravity is rapidly reduced When a reaches the set value, the shock sensor for generating a shock signal, and the electronic control unit (ECU) for exploding the primer of the inflator in accordance with 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.

The airbag module having the above configuration is configured to generate a predetermined signal by the impact sensor when the driving speed is sharply lowered due to the frontal collision of the vehicle, and then recognizes the impact signal output from the impact sensor. The primer is ignited to burn 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, the impact energy is absorbed by the discharge of the expanded gas into the discharge hole formed in the airbag cushion, thereby effectively cushioning the impact force transmitted to the occupant in the event of a collision, thereby reducing 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 FIG. 1, the airbag cushion 1 of the passenger seat airbag module is fixed to the instrument panel and installed inside an airbag cushion housing (not shown) which is covered by an upper surface opened by an airbag cushion cover (not shown). It is fixed to the inflator so as to be developed by the gas flowing from the inflator (not shown).

Moreover, the airbag cushion 1 has a plurality of tethers (not shown) fixed to the inner circumferential surfaces of the rear of the front and rear of the airbag cushion 1, and the tether has a predetermined shape on the front when the airbag cushion is deployed. By the size, the airbag cushion serves to prevent damage to the airbag cushion and injury to the occupant due to rapid expansion during deployment of the airbag cushion.

That is, the airbag cushion shape is formed symmetrically in the center except for a special case, and since the center is installed to correspond to the gas outlet of the inflator, the high pressure gas concentrated on the center side of the airbag cushion during the initial deployment is evenly distributed. Is blown out.

However, according to an actual vehicle test of the passenger seat airbag module having the above-described structure, as shown in FIG. 2, the cushion is in contact with the passenger seat before the cushion of the passenger seat airbag module is fully deployed. Slap phenomenon) occurs. For this reason, the conventional passenger seat airbag module has a problem that an unexpected injury may occur to the passenger seat passenger by the cushion of the airbag module for accident prevention.

The present invention has been made to solve the above problems, in particular, in the event of a collision and collision of the vehicle, the cushion of the airbag module before the fully deployed (deployed) to prevent the phenomenon that the cushion contact with the passenger seat passenger to the passenger passenger An object of the present invention is to provide a passenger seat airbag module for a vehicle to prevent injuries that may occur.

Vehicle passenger seat airbag module according to the present invention for solving the above problems,

The inflator, which receives a signal from a detection sensor that detects a collision of the vehicle, ignites and discharges the high-pressure gas filled therein, the housing in which the inflator is mounted, and the gas generated in the inflator are guided by a diffuser A passenger seat airbag module including an airbag cushion that is inflated to prevent a collision between instrument panels, wherein the airbag cushion is formed to be symmetrical with respect to a center part, and the center part has the airbag cushion at the initial deployment of the airbag cushion. It is characterized in that the auxiliary fixing member is attached to prevent the phenomenon of contact with the passenger seat passenger.

In addition, the auxiliary fixing member is characterized in that 10 to 20% of the airbag cushion area.

In addition, the auxiliary fixing member is characterized in that formed of woven fibers selected from the group consisting of nylon, polyester, and polyamide.

In addition, the auxiliary fixing member is characterized in that consisting of a band.

In addition, the auxiliary fixing member is characterized in that consisting of at least two bands.

According to the passenger seat airbag module for a vehicle according to the present invention having the configuration as described above,

In the event of a collision or collision, the cushion of the airbag module is prevented from coming into contact with the passenger before the cushion is fully deployed, thereby preventing the injuries that may occur to the passenger in front of the passenger seat. It can be effected.

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

2 is a vehicle test using a passenger seat airbag module for a vehicle according to the prior art,

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

4 is a view showing another embodiment of the airbag cushion of the passenger seat airbag module for a vehicle according to the present invention;

<Description of the symbols for the main parts of the drawings>

10 airbag cushion 20 auxiliary fixing member

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; First, it should be noted that the same components or parts in the drawings represent the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the gist of 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 another embodiment of the airbag cushion of the passenger seat airbag module for a vehicle according to the present invention.

Referring to FIG. 3, a passenger seat airbag module for a vehicle according to the present invention is fixed to an instrument panel and installed inside an airbag cushion housing (not shown) surrounding an upper surface opened by an airbag cushion cover (not shown). It is fixed to be developed by the high-pressure gas flowing from the inflator (not shown) installed inside the cushion housing.

Here, the airbag cushion 10 is typically formed of woven fibers selected from the group consisting of nylon, polyester, and polyamide, and is installed in an expandably folded state to be deployed by high pressure gas.

At this time, the airbag cushion 10 is formed to be symmetrical with respect to the center (C), the center (C) for preventing the phenomenon that the airbag cushion is in contact with the passenger seat passenger during the initial deployment of the airbag cushion Auxiliary fixing member 20 is attached.

Figure 3 shows the initial deployment of the airbag cushion, and therefore, the airbag cushion is not fully deployed so that the auxiliary fixing member 20 is attached. However, in the development process after the initial deployment, the auxiliary fixing member 20 is broken and proceeds with the normal deployment process.

That is, the auxiliary fixing member 20 does not permanently attach the airbag cushion 10, but temporarily suppresses the expansion of the cushion in the process of deploying the airbag cushion at the beginning of the collision or collision of the vehicle, and the initial deployment process. By breaking later, it is possible to prevent the cushion from coming into contact with the front passenger before the cushion is fully deployed, thereby preventing injuries that may occur to the front passenger.

At this time, the auxiliary fixing member 20 is preferably 10 to 20% of the airbag cushion area. This is because the ratio is an effective area ratio in terms of cost reduction, production process, and package.

In addition, the auxiliary fixing member is preferably formed of a woven fiber selected from the group consisting of nylon, polyester, and polyamide. The auxiliary fixing member may be formed of one band, but may be formed of at least two thin bands as shown in FIG. 4. This is because the production process and the working environment may vary.

The airbag cushion 10 having such a structure is provided with a developing pressure distribution member (not shown) for evenly dispersing the high pressure gas introduced into the airbag cushion by suppressing the initial development of the airbag cushion when the airbag cushion is deployed.

In addition, the deployment pressure distribution member (not shown) is fixed to the rear inner peripheral surface 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 It is preferred to be formed from the same woven fiber.

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 (not shown) of a predetermined length fixed to both the front portion and the rear inner circumference of the airbag cushion. By the tether, since the airbag cushion 10 is deployed only by its length, it is possible to adjust the deployment size of the airbag cushion together with the deployment pressure distribution member (not shown). Such a tether is preferably formed of a material that can withstand a relatively large load, for example, may be formed of a material such as nylon or cloth.

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.

During the initial deployment of the airbag cushion, the high pressure gas flows into the deployment pressure dispersing member installed inside the airbag cushion, and the deployment pressure is suppressed by the sealed center portion, so that the airbag cushion passes through the holes formed at both sides thereof. Evenly distributed in both side directions.

Thus, when the developing pressure dispersing member is developed to some extent, when the developing pressure by the high pressure gas continuously ejected from the inflator is greater than the tension of the sewing line sewn to 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.

At this time, during the initial deployment of the airbag cushion, the auxiliary fixing member suppresses the instantaneous expansion of the airbag cushion to prevent the cushion from contacting the passenger seat before the cushion is fully deployed. However, in the development process after the initial deployment, the auxiliary fixing member is broken and the normal development process is performed.

As described above with reference to the drawings illustrating a passenger seat airbag module for a vehicle according to the present invention, the present invention is not limited by the embodiments and drawings disclosed herein, it is to those skilled in the art within the technical scope of the present invention Of course, various modifications can be made.

Claims (3)

The inflator, which receives a signal from a detection sensor that detects a collision of the vehicle, ignites and discharges the high-pressure gas filled therein, the housing in which the inflator is mounted, and the gas generated in the inflator are guided by a diffuser A passenger seat airbag module comprising an airbag cushion inflated to prevent a collision between instrument panels, The airbag cushion is formed to be symmetrical with respect to the center, and the vehicle is characterized in that the auxiliary fixing member for preventing the phenomenon that the airbag cushion is in contact with the passenger seat passenger when the airbag cushion is initially deployed. Passenger seat airbag module. The method according to claim 1, Wherein the auxiliary fixing member vehicle passenger seat airbag module, characterized in that 10 to 20% of the airbag cushion area. The method according to claim 1, Wherein the auxiliary fixing member vehicle passenger seat airbag module, characterized in that consisting of one or more bands.