KR101294923B1 - Air bag device - Google Patents

Abstract

The airbag device according to the present invention includes a cushion that is formed on both sides of the cushion and a cushion formed on both sides of the cushion to inject gas generated from the inflator when the vehicle collides and discharge the gas to the outside, and the sinching One side is connected to the inner surface of the cushion in which the vent hole is formed, and the cinching tether connected to the other side on the inner side of the front portion of the cushion and the middle portion of the cinching tether are moved to one side of the cinching tether around the cinch venting hole. The cushion including a tether holder provided in the opposite portion and the cushion developed in the normal seating state of the occupant of the cushion pulls one side of the cinching tether provided in the cushion to pull the cinch venting hole in the direction of the tether holder. Is shielded, and if the development of the cushion is hindered by an abnormal seating state of the occupant, Since the tether is loosened and one side of the cushion is opened, the new vent hole is opened, thereby reducing the injuries of the cushion, thereby minimizing injuries to occupants in abnormal seating conditions and ensuring sufficient protection for occupants in normal seating conditions. All test conditions for abnormal seating conditions of 1 year old infants, 3 years old infants, and 6 years old infants are satisfied, and the number of parts, cost, and weight of the airbag device are reduced by eliminating the passenger sensor and a plurality of flaps. There is this.

Airbag device, cushion, abnormal seating condition, injury reduction means, Xinqing vent hole, Xinqing tether, tether holder

Description

Air bag device {AIR BAG DEVICE}

1 is a cross-sectional view showing a passenger seat airbag device with a cushion of the present invention,

Figure 2 is a block diagram showing a cushion of the airbag apparatus according to the present invention,

Figure 3 is a perspective view of the injury reducing means of Figure 2,

4 is a side cross-sectional view when the cushion of FIG. 2 is fully deployed;

5 is an operation state of the cushion when the occupant is in an abnormal seating state during the initial deployment of the airbag apparatus according to the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

2: instrument panel 4: airbag housing

6: inflator 8: retainer

10: airbag door 20: cushion

22: gas inlet 24: vent hole

26: internal tether 30: injury reduction means

32: Xinqing Venthole 34: Xinqing Tether

36: tether holder 38: tether connection

The present invention relates to an airbag apparatus that protects a passenger from impact during a collision of a vehicle, and in particular, an airbag apparatus that minimizes injuries to a passenger in an abnormal seating state and also secures protection for a passenger in a normal seating state. It is about.

In general, the airbag device is installed inside the vehicle and is installed for the purpose of protecting the occupant seated in the driver's seat or the passenger seat from impact in the event of a vehicle crash.

The airbag device includes a driver's seat airbag device, a passenger seat airbag device, a side airbag device, and the like. The driver's seat airbag device is mounted on a steering wheel to protect the driver's front surface. The side airbag device is installed on the side of the seat to protect the side of the occupant.

Such an airbag device includes an inflator for releasing gas during a collision of a vehicle, a cushion that is deployed toward the occupant by the gas of the inflator, and absorbs the shock of the occupant, and an airbag in which the cushion and the inflator are stored and installed inside the vehicle. It is configured to include a housing.

Here, the gas inlet for the gas of the inflator is formed on the opposite side of the occupant of the cushion, the interior of the cushion is provided with one or more internal tether (TETHER) to determine the deployment shape of the cushion.

Therefore, the airbag device is gas is released from the inflator in the collision of the vehicle is introduced into the cushion, the cushion is deployed toward the occupant by the pressure of the gas to absorb and cushion the shock of the occupant.

However, the airbag apparatus according to the prior art is not in the passenger seat is not protected by the deployed cushion if the occupant (OOP, OUT-OF-POSITION) state in which the occupant sits in an abnormal posture on the seat of the vehicle, There is a problem that the occupant is further injured by the pressure of the cushion.

Therefore, the airbag device is provided with a passenger detection sensor for recognizing the seated state of the occupant inside the vehicle, and when the passenger is recognized as an abnormal seating state by the passenger detection sensor, the deployment of the cushion is stopped to develop the pressure of the cushion. Injury is prevented, but this method has not been a fundamental solution to protect occupants in abnormal sitting conditions.

Meanwhile, in recent years, the cushion of the airbag device has been developed to reduce injury (LRD, LOW RISK DEPLOYMENT) to minimize injury to occupants in an abnormal seating state. And a method for holding the initial development of the cushion as a separate structure.

Here, if the gas ejection pressure of the inflator is lowered, the protection performance of the airbag device against the occupant in a normal seating state is lowered, and the initial gas pressure of the inflator is lowered by using a plurality of inflators having different timings of ejecting gas during a collision of the vehicle. If there is a problem that the cost burden increases due to the increase in the number of inflators.

In addition, when a plurality of flaps are arranged to overlap the outside of the cushion or an external tether having a tear line is disposed, the cushion may be formed by frictional resistance between the flaps or cutting force of the tear line. Initial deployment is delayed to reduce the injuries of the occupant due to the initial deployment of the cushion. However, since the frictional resistance between the flaps and the cutting force of the tear line are not constant, the protection performance of the airbag apparatus is not uniform, and the workmanship of the plurality of flaps is also greatly increased.

In recent years, regulations on the protection performance of airbag devices have been tightened to protect passengers in abnormal seating conditions. In particular, airbag devices for abnormal seating conditions, such as 1 year old infants, 3 years old infants, and 6 years old infants, have been strengthened. Performance is required, and failure to meet this required performance is penalized for business.

However, the above-described flap or external tether reduction of injury is satisfied with the protection of 6-year-old infants who are more similar to adults, but the 1-year-old infants and 3-year-old infants differ greatly from adults. It is a very difficult problem to satisfy the protection performance.

According to the present invention, when the occupant is in an abnormal seating state during the initial deployment of the cushion, the cushion is provided with injury reduction means for preventing the release of gas when the occupant is in a normal seating state. It is an object of the present invention to provide an airbag device that can be minimized and secured to a passenger in a normal seating state.

In addition, another object of the present invention is to ensure the protection performance of the airbag device against abnormal sitting state of infants, infants, children, 3 years old, 6 years old, and the number and cost and weight of the airbag device can be reduced To provide.

The present invention includes a cushion in which the gas generated in the inflator flows into the occupant and collides with the occupant; When the occupant is in an abnormal seating state during the initial deployment of the cushion, the gas is discharged to the outside, and if the occupant is in a normal seating state, an airbag device including an injury reducing means provided on one side of the cushion is prevented.

The injury reducing means may include a CINCHING VENT HOLE formed in the cushion; Cinching tether (CINCHING TETHER) that one side is connected to the inner surface of the cushion formed with the sinching vent hole and the other side is connected to the inner surface of the front portion of the cushion; The middle portion of the Xinqing tether is movable at a portion facing the side of the Xinqing tether around the Xinqing vent hole to open and close the Xinqing vent hole while folding or expanding one side of the cushion according to the front deployment length of the cushion. Includes a tether holder that is hooked up.

The new vent holes are provided at both side surfaces of the cushion.

Both sides of the tether holder are connected to the inner surface of the cushion so that the middle portion of the cinch tether is movably disposed between the cushion and the cushion.

The tether holder is provided at the rear of the cinch vent hole, and the cinch tether is connected to one side of the cinch vent hole in front of the cinch holder, and the other end is connected to the inner side of the front portion of the cushion.

Both sides of the tether holder and the cinch tether are sewn and mounted on the inner surface of the cushion.

On the other hand, both sides of the cushion are provided with vent holes for emitting gas to the outside, respectively.

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

1 is a cross-sectional view showing a passenger seat airbag device with a cushion of the present invention.

As shown in FIG. 1, the passenger seat airbag device according to the present invention includes an airbag housing 4 installed in the instrument panel 2 and an inflator installed in the airbag housing 4 to eject gas during a collision of the vehicle. 6) and a retainer 8 mounted and fixed inside the airbag housing 4 and having a plurality of holes for releasing gas from the inflator 6, and mounted on an opened front surface of the airbag housing 4; The airbag door 10 disposed in the hole of the instrument panel 2 and the airbag housing 4 so as to be deployed toward the passenger seat while breaking the airbag door 10 by the gas flowing through the hole of the retainer 8. It is configured to include a cushion 20 accommodated in the interior.

The airbag housing 4 is mounted on the rear surface of the instrument panel 2 and the cushion housing 12 in which the cushion 20 is stored therein, and installed in the rear of the cushion housing 12 and the inflator 6 ) Is composed of a can housing 14 housed therein.

A hook 16 fitted to a hook hole 10A formed on a side surface of the airbag door 10 is formed on an outer surface of the cushion housing 12, and a mounting bracket (on one side of the can housing 14) is provided. Not shown) is formed and fastened by bolts to the cowl cross member (not shown).

The inflator 6 is connected to a collision detection sensor (not shown) that detects a collision of the vehicle and is exploded by the signal of the collision detection sensor when the collision of the vehicle, and the gas pressure to the front of the cushion housing 12 The cushion 20 is deployed.

The cushion 20 is a member of a fabric material that is deployed by the gas of the inflator 6 when the vehicle collides to protect the passenger of the passenger seat from impact, and is folded in various structures inside the airbag housing 4. It is received.

A gas inlet through which the gas of the inflator 6 flows is formed in the rear portion of the cushion 20, and is fastened and fixed to the airbag housing 4 by the retainer 8 by the fastening member 18.

Figure 2 is a block diagram showing a cushion of the airbag apparatus according to the present invention, Figure 3 is a perspective view showing the injury reduction means of Figure 2, Figure 4 is a side cross-sectional view when the cushion of Figure 2 fully deployed.

As shown in FIGS. 2 to 4, the cushion 20 of the present invention has a gas inlet 22 through which the gas of the inflator 6 flows, and is formed at a rear portion thereof, and the internal gas of the cushion 20 is formed. Vent holes 24 for discharging to the outside are formed on both side surfaces, and an inner tether 26 for determining an unfolded shape of the cushion 20 is provided inside.

The gas inlet 22 is disposed between the retainer 8 and the airbag housing 4, with an inlet hole 22A in communication with the hole of the retainer 8.

The vent hole 24 prevents excessive increase in gas pressure when the cushion 20 is in full bloom, and smoothly relaxes when a load of a passenger is applied to the cushion 20 to help absorb shock. Configuration.

The inner tether 26 is a band-shaped member that limits the front deployment length of the cushion 20 and allows the cushion 20 to be deployed in another direction, and one side of the inner tether 26 is a gas inlet of the cushion 20. It is connected to (22), the other side is connected to the inner surface of the front portion of the cushion (20).

On the other hand, one side of the cushion 20 is provided with an injury reduction means 30 for releasing the gas to the outside when the occupant is in an abnormal seating state during the initial deployment of the cushion 20 and to prevent the release of gas when the occupant is in a normal seating state. do.

The injury reduction means 30 is configured to implement an injury reduction deployment of the cushion 20, and a CINCHING VENT HOLE 32 formed in the cushion 20, and the Cinch vent hole 32. One side is connected to the inner surface of the formed cushion 20 and the cinching tether (CINCHING TETHER) 34, the other side is connected to the inner side of the front portion of the cushion 20, and the intermediate portion of the cinching tether 34 is moved. It is configured to include a tether holder 36 provided at a portion facing one side of the cinch tether 34 with respect to the cinch vent hole 32 so as to be able to walk.

Here, the new vent hole 32 may be provided on at least one of the upper surface, the lower surface, the left surface, the right surface, and the rear surface of the cushion 20, but in the present embodiment, both sides of the cushion 20 It will be described with limited to each provided.

The new vent hole 32 is positioned behind the vent hole 24 to allow the gas to be discharged during the initial deployment of the cushion 20, so that the internal gas of the cushion 20 can be smoothly discharged. It may be larger than the vent hole 24.

In addition, the tether holder 36 is a band-shaped member disposed at the rear of the cinch vent hole 32, and only the middle portion of the tether holder 36 is spaced apart from the inner surface of the cushion 20. Both sides are connected to the inner side of 20).

An intermediate portion of the cinch tether 34 is movably disposed between the intermediate portion of the tether holder 36 and the inner surface of the cushion 20.

In addition, the cinching tether 34 is a strip-shaped member formed between the both sides of the cushion 20 provided with the cinch vent hole 32 and the inner side of the front portion of the cushion 20, and the cinching One side is connected to the front of the vent hole 32, the intermediate portion is hooked to the tether holder 36, and then the direction is changed to the front, and the other side is connected to the inner side of the front portion of the cushion 20.

That is, the middle portion of the cinch tether 34 is inserted between the middle portion of the tether holder 36 and the inner surface of the cushion 20 and then bent forward to bend in a '' shape as a whole.

Accordingly, when the cushion 20 is unfolded, the cinch tether 34 is pulled by the unfolding force of the cushion 20, so that one side of the cushion 20 is folded to shield the cinch vent hole 32, and the cushion ( If the deployment of 20) is disturbed by the occupant in the abnormal seating state, the cinching tether 34 is loosened, so that one side of the cushion 20 is unfolded to open the cinch vent hole 32.

The front side inner surface of the cushion 20 as described above is provided with a tether connecting portion 38 formed long in the left and right directions so that the other side of the cinch tether 34 can be easily and firmly connected.

The tether holder 36, the cinch tether 34, the inner tether 26, the tether connection portion 38, or the cushion 20 is formed of a fabric material, each connecting portion is sewn in the sewing method Is connected by.

Looking at the operation and effect of the passenger seat airbag device according to the present invention configured as described above are as follows.

5 is an operational state diagram of the cushion when the occupant is in an abnormal seating state during the initial deployment of the airbag apparatus according to the present invention.

First, when a collision of the vehicle is detected by the collision detection sensor, gas is released while the inflator 6 is exploded by the signal of the collision detection sensor, and the gas of the inflator 6 moves along the airbag housing 4. And then flows into the cushion 20 through the hole of the retainer 8 to develop the cushion 20.

Cushion 20 as described above breaks the incision line (10B) formed in the airbag door 10 and then deployed to the front of the passenger seated in the passenger seat to absorb the impact of the occupant.

On the other hand, if the occupant in the vehicle at the time of deployment of the cushion 20 is in a normal seating state, the inner tether 26 and the new tether 34 are pulled out by the forward force of the cushion 20 to be unfolded. The cushion 20 is deployed forward until the inner tether 26 and the cinch tether 34 are completely unfolded.

When the inner tether 26 and the cinch tether 34 are completely unfolded, the inner tether 26 and the cinch tether 34 restrain the front deployment of the cushion 20 and at the same time the cushion 20 The deployment of the cushion 20 is controlled by guiding the deployment in the other direction.

At this time, since the stress pulled forward by the development force of the cushion 20 is continuously applied to the cinch tether 34, a portion where the cinch vent holes 32 are formed on both sides of the cushion 20 is the cinch tether ( It is kept in a folded state by the stress of 34 to prevent the release of gas through the cinch vent hole 32.

When the occupant is loaded in the front part of the cushion 20 deployed as described above and the load of the occupant is transmitted, gas is released through the vent hole 24 of the cushion 20, and the cushion 20 is provided. This relaxation will absorb the shock of the occupant.

On the other hand, if the occupant in the vehicle is in an abnormal seating state when the cushion 20 is deployed, the inner tether 26 and the cinch tether 34 may be affected by the developing force of the cushion 20 at the initial stage of the deployment of the cushion 20. While being pulled forward by the front, as shown in FIG. 5, before the inner tether 26 and the cinch tether 34 are completely unfolded, the occupant in an abnormal seating state is loaded by the load F of the occupant. Since the deployment of the cushion 20 is constrained, the stress acting on the cinch tether 34 is removed.

When the front deployment of the cushion 20 is disturbed by the load F of the occupant as described above, the cushion 20 is developed by the gas G of the inflator 6 in a direction other than the front, and The stress applied to the cinch tether 34 is removed to loosen the cinch tether 34.

Therefore, both side portions of the cushion 20 on which the cinch vent hole 32 is formed are not only kept in a folded state due to the stress of the cinch tether 34, and the cushion 20 is deployed in the left and right directions. Both sides of the cushion 20 are unfolded by the development force, and the cinch vent hole 32 is opened.

Since the cushion 20 is discharged to the outside through the new vent hole 32, the initial deployment pressure of the cushion 20 is reduced, so that the occupant is injured by the forward deployment force of the cushion 20. Wear problem is solved. That is, the cushion 20 is deployed to reduce the injury is secured protection performance for the occupant in an abnormal seating state.

At this time, when the load of the occupant acting on the cushion 20 is removed, the cushion 20 is normally deployed by the gas of the inflator 6 so that the cinching tether 34 is pulled forward, and the cinching tether. Both sides of the cushion 20 in which the new vent holes 32 are formed by the 34 are folded, and the new vent holes 32 are shielded. Therefore, the gas is prevented from being discharged through the cinch vent hole 32 to minimize the loss of gas when the cushion 20 is deployed.

As described above, the airbag device of the present invention may be cushioned by the cinch vent hole 32, the cinch tether 34, and the tether holder 36 formed in the cushion 20 even though a separate flap or an external tether is not used. 20) Implementing the reduction of injury is implemented, and the protection performance for both the occupant in the abnormal sitting state and the normal sitting state is secured.

In particular, since the protection performance of the airbag device against abnormal seating conditions corresponding to 1 year old infant, 3 year old infant, and 6 year old infant is satisfied, the merchandise of the airbag apparatus is maximized, which is advantageous for product sales.

As mentioned above, although the airbag apparatus which concerns on this invention was demonstrated with reference to the Example illustrated in drawing, this invention is not limited by said Example and drawing, It is variously modified by those skilled in the art within the technical idea of the invention. Of course this is possible.

That is, the tether holder is formed at any one of the front side, the upper side, and the lower side of the cinch vent hole, and one side of the cinch tether may be connected to the rear side, the bottom side, and the top side of the cinch vent hole.

Since the airbag device according to the present invention configured as described above is provided on one side of the cushion to reduce the discharge of gas to the outside when the occupant is in an abnormal seating state during the initial deployment of the cushion and to prevent the release of gas when the occupant is in a normal seating state. In addition, the injury reduction deployment of the cushion is implemented by the injury reduction means has the advantage that the injury to the occupant in the abnormal seating state is minimized, and the protection performance for the occupant in the normal seating state is also sufficiently secured.

In addition, the airbag device equipped with the cushion is sold in the airbag device because the regulation on the development of injury reduction is satisfied in all the test conditions for 1 year old infant, 3 years old infant, and 6 years old infant during performance test for abnormal seating condition. There is an advantage in that operating disadvantages can be prevented.

In addition, since the cushion is provided with an injury reducing means to ensure the protection performance of the airbag device against abnormal seating and normal seating state, the passenger detection sensor, a plurality of flaps, external tether, etc. required for the conventional airbag device is omitted There is an advantage that the number of parts, cost and weight of the device are reduced.

Claims (7)

A cushion in which gas generated in the inflator flows in the collision of the vehicle and is deployed toward the occupant; A cinch vent hole formed at both sides of the cushion and formed at a rear side of the vent hole for discharging gas to the outside; A cinch tether having one side connected to an inner side surface of the cushion on which the cinch vent hole is formed, and the other side connected to the front side inner side of the cushion; And a tether holder provided at a portion opposite to one side of the cinch tether with the middle part of the cinch tether moved to the center of the cinch vent hole. The cushion deployed in the normal seating state of the occupant is the one side of the cinching tether provided in the cushion pulls the cinch venting hole in the direction of the tether holder is shielded, When the deployment of the cushion is disturbed by an abnormal seating state of the occupant, the cinching tether is loosened so that one side of the cushion is opened so that the cinch venting hole is opened. According to the first, One side of the cinch tether is coupled between the front portion of the cushion and the cinch vent hole, The other side of the cinch tether is inserted into the tether holder, the other side is coupled to the tether connecting portion in the front portion of the cushion. In the second aspect, One end of the cinch tether is coupled to the air bag device close to the cinch vent hole. In the second aspect, The tether connection unit is provided on the inner surface of the cushion to be connected to the cinch tether. delete delete delete

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