KR20160002101A - Passenger Airbag Of Vehicle - Google Patents

Abstract

The present invention relates to a passenger airbag of a vehicle, which comprises: an inflator; a cushion deployed as gas is introduced from the inflator, wherein a vent hole is formed for the gas to be partially discharged; a vent cover installed in the cushion to open and close the vent hole; and a tether installed along the inner circumferential surface in a deployment direction of the cushion and installed to pass a gap between the vent hole and the vent cover to open and close the vent cover due to change in internal pressure of the cushion. In the tether, a portion is tack welded to be annular so as to surround the vent cover. Therefore, when the cushion is deployed, the tack welded portion is torn for the vent cover to cover the vent hole.

Description

Passenger Airbag Of Vehicle [0002]

[0001] The present invention relates to a passenger-side airbag of a vehicle, and more particularly, to a ventilation system for a passenger-side airbag that incorporates an LRD vent (low risk deployment vent) and an active vent into a vent, The present invention relates to a passenger-side airbag of a vehicle that reduces the risk of injury to passengers by adjusting the pressure.

BACKGROUND ART [0002] Generally, an automobile is provided with an airbag device, which is a safety device that protects an occupant by inflating an airbag cushion by inflow of gas from an inflator when a car accident occurs.

The airbag device is installed in each part of the vehicle as needed. The airbag device includes a driver's seat airbag device mounted on a steering wheel to protect a driver sitting on the driver's seat, a passenger-side airbag Device, and a curtain airbag device mounted along the roof rail to protect the passenger's side.

The passenger-side airbag device includes an active vent (hereinafter referred to as an 'active vent') and an LRD Vent (hereinafter referred to as 'LRD vent') formed in a cushion to control the cushion internal pressure when the cushion is deployed To protect passengers.

More specifically, when an active airbag is deployed to protect passengers when a collision occurs in the vehicle body, the amount of gas to be filled in the airbag is increased more than necessary to increase the head inertia criterion, To prevent the phenomenon, connect an active vent to a separate TRU (Tether Release Unit) to operate the TRU when the internal pressure is more than necessary. At this time, the fixed active vent is separated from the cushion side panel to generate a separate vent hole, so that the gas inside the cushion is discharged, and when the head of the passenger shocks the cushion, the head acceleration of the passenger is lowered, Reduce head injury.

When the infant (3 to 6 years old) is seated in the passenger compartment, the LRD vent is impacted on the neck and head by the force of the deployment of the cushion when the airbag is deployed, The internal pressure of the cushion is lowered in a short time by applying the LRD vent in order to reduce the injury of infants and children and to protect the passengers due to the cushion development in the abnormal seating state Protect passengers from infant and unusual sitting situations.

That is, in the LRD vent, the cushion is deployed at the time of the infant no-ride and the adult boarding (abnormal seating state), tension is generated in the tether connected to the LRD vent installed in the cushion, and the vent hole of the LRD vent is tightened, The gas inside the cushion is not discharged to the outside of the cushion, so that the internal pressure of the cushion is maintained.

Existing active vents reduce head injuries by reducing internal pressure. However, since the cushion internal pressure is low, the passenger's injury level is high. When passengers collide with the cushion at a high speed, the cushion pressure decreases as the latter half. There is a problem in that it occurs.

In addition, in order to solve the above-mentioned problems, there is a problem that the size of the general vent is required to be reduced by adjusting the change of the internal pressure when the cushion is deployed when the active vent is applied to the cushion.

Further, when the LRD vent is additionally applied to satisfy the LRD performance, the addition and manufacture of the work process are complicated, resulting in a rise in cost, deterioration in workability, and variation in cushion deployment.

In order to improve the performance of the passenger's neck injury and LRD vent, the present invention is intended to maintain the vent open at the initial stage of cushion deployment and to prevent neck injury by the inflated airbag when the airbag is full It is aimed to improve the neck injury by keeping the pressure inside the airbag vents at an increasing point.

In addition, the size of the general vent which had to be reduced in order to apply the active vent to the cushion was greatly enlarged to improve the head injury, while the unbelt regulation test kept the internal pressure of the cushion after the passenger collided with the cushion, And to prevent a secondary collision by a vehicle body or the like.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a passenger-side airbag for a vehicle, the passenger-side airbag comprising: an inflator; a cushion having a vent hole formed therein for introducing gas from the inflator, A vent cover provided on the cushion so as to open and close; a vent cover provided along an inner circumferential surface in a direction of deployment of the cushion, the vent cover being provided between the vent hole and the vent cover, The vent cover is folded inside the ring of the tether, and when the cushion is deployed, the tether is subjected to tension before the tension is generated The vent cover covers the vent hole.

When the cushion is full, the vent cover can be pulled toward the center of the cushion by the deploying force of the cushion to open the vent hole.

In addition, when the cushion is full, the tension of the tether is reduced according to the amount of change of the cushion, thereby shielding the vent cover.

The tether may be shorter than an inner circumferential length of the cushion so that the tent part is torn when the cushion is full.

In addition, the central portion of the tether may be connected to the front surface of the cushion facing the passenger, and both ends may be connected to the rear surface of the cushion.

In addition, the at least one tether may be provided.

A part of the vent cover is folded a plurality of times to be fixed to the hook of the tether so that a part of the vent hole is partially opened when the cushion is initially deployed to partially exhaust the gas inside the cushion.

The vent hole is formed in a spherical shape, and the vent cover is provided so as to cover the vent hole, and is sewed except for one side and the other side where the tether passes.

The vent cover is folded on one side and the other side a plurality of times so as to be disposed in the ring of the tether.

Further, the vent cover and the tether may be installed inside the cushion.

The details of other embodiments are included in the detailed description and drawings.

According to the passenger-side airbag apparatus of the present invention, one or more of the following effects are the same.

First, in the New Car Assessment Program (NCAP), safety performance can be improved by lowering the injuries to the neck and head of passengers in the event of a crash.

Second, when the active vent is applied to the cushion, it is possible to largely control the general vent according to the change of the internal pressure without decreasing the size of the general vent when the cushion is deployed.

Third, by applying the LRD vent and general vent at the same time, it reduces the work process to reduce the cost, improves the workability, has no effect on the cushion development, and simplifies the vent structure applied to the cushion. And the time of the cushion manufacturing process can be shortened by deleting the Thether Release Unit or the LRD vent.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a side view showing a passenger-side airbag of a vehicle according to the present invention,
FIG. 2A is a side view showing an initial deployment of the passenger seat airbag in the vehicle according to the present invention,
FIG. 2B is a sectional view showing AA in FIG. 2A,
2C is a partially enlarged view showing a part of FIG. 2B,
FIG. 3A is a side view showing a front passenger's seat airbag before the vehicle according to the present invention is fully populated;
FIG. 3B is a sectional view showing BB in FIG. 3A,
FIG. 3C is a sectional view showing B'-B 'in FIG. 3A,
FIG. 4A is a side view showing the passenger's seat airbag in full bloom according to the present invention, FIG.
4B is a cross-sectional view showing CC of Fig. 4A,
4C is a cross-sectional view showing C'-C 'in FIG. 4A,
FIG. 5A is a side view showing a collision in the full-passenger's airbag full state of the vehicle according to the present invention, FIG.
5B is a cross-sectional view showing DD of FIG. 5A,
5C is a cross-sectional view showing D'-D 'in FIG. 5A.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining an assistant driver's seat airbag according to embodiments of the present invention.

FIG. 2A is a side view showing the initial deployment of the passenger's seat airbag according to the present invention, FIG. 2B is a sectional view showing AA in FIG. 2A, FIG. 2C is a cross- 3A is a side view showing the airbag before full passenger's airbag deployment according to the present invention, Fig. 3B is a sectional view showing BB of Fig. 3A, and Fig. 3C is a cross- 4B is a cross-sectional view showing the CC of FIG. 4A, and FIG. 4C is a cross-sectional view showing a state in which the airbag is fully opened in the direction of arrows C'-C 'of FIG. 4A Fig. 5A is a side view showing a collision when the passenger's seat airbag in full bout of the vehicle according to the present invention, Fig. 5B is a sectional view showing DD in Fig. 5A, and Fig. 5C is a sectional view in D'-D 'in Fig.

The passenger's seat airbag of the preferred vehicle can be changed by a person skilled in the art, and in the embodiment of the present invention is the case of the passenger's seat airbag of the vehicle.

Fig. 1 is a side view showing an assistant driver's seat airbag according to the present invention, and Fig. 2b is a sectional view showing A-A in Fig. 2a.

1, 2A, 2B and 2C, an inflator 15 and a vent hole 20 are formed in the inflator 15 so that gas is introduced into the inflator 15, A vent cover 30 provided on the cushion 20 for opening and closing the vent holes 28a and 28b and a vent cover 30 for opening and closing the vent holes 28a and 28b, A tether 40 which is installed along the surface of the vent cover and passes between the vent holes 28a and 28b and the vent cover 30 and opens and closes the vent cover by a change in internal pressure of the cushion 20, .

The inflator 15 is fixed to the retainer (not shown) so as not to be detached when the gas is generated, and is installed in the housing 10 by the fixing bolts of the retainer. The inflator 15 is connected to an ACU (Airbag Control Unit) (not shown) through a wire to generate gas when the vehicle is in an accident, Is introduced into the cushion 20 and expanded.

The cushion 20 is disposed inside the inflator 15, folded a plurality of times and placed in the housing. The cushion 20 can inflate with the inflow of gas from the inflator 15 to protect the passenger. Embodiments of the present invention are deployed to protect passengers in the passenger seat.

The cushion 20 is made of three panels. That is, the cushion 20 includes a main panel 22 that is in contact with a passenger, and side panels 24 and 26 that are coupled to both sides of the main panel 22, respectively. The side panels 24 and 26 are formed with vent holes 28a and 28b through which the gas introduced into the cushion 20 is partially discharged.

The cushion 20 should not be excessively discharged so that the head of the passenger can be loaded early when the cushion 20 is initially inflated and the gas is further appropriately discharged to the cushion 20 when the passenger's upper body is loaded, The internal pressure of the passenger 20 should be optimized so as to minimize the injury to the head, neck and chest portion of the passenger.

The ventilation holes 28a and 28b are formed in a spherical shape so that the gas generated from the inflator 15 is partially discharged to the outside of the cushion 20 and the vent holes 28a and 28b are opened and closed A vent cover 30 is installed. The tether 40 and the vent cover 30 are connected to the cushion 20 so that the deployment force of the cushion 20 is transmitted to the vent cover 30 to open and close the vent holes 28a and 28b.

The vent cover 30 is provided to cover the vent holes 28a and 28b. The vent cover 30 is formed in a substantially square and rectangular shape. And is preferably formed in a rectangular shape as in the present invention. A part of the vent cover 30 is fixed to the tether 40 such that the vent holes 28a and 28b are partially opened when the cushion 20 is initially opened.

A part of the vent cover 30 is folded a plurality of times to be fixed to the hooks 44a and 44b of the tether 40 so that the vent holes 28a and 28b are partially opened when the cushion 20 is initially deployed, 20). The vent cover (30) and the tether (40) are installed inside the cushion (20). The vent cover 30 is sewn except for one side and the other side through which the tether 40 passes. That is, the upper side and the lower side of the vent cover 30 are sewn.

The tether 40 is partially adhered so as to maintain the annular shape so as to surround the vent cover 30. One end 42a of the tether 40 is connected to and fixed to the housing 10 and the other end 42b is passed through one side and the other side between the first side panel 24 and the first vent cover 30 Passes through the main panel 22 and passes through one side of the other side between the second side panel 26 and the second vent cover 30b and is connected to and fixed to one end 42a of the tether 40 The center portion 46 of the tether 40 is fixed to the main panel 22. [

At least one tether 40 may be provided. In the present invention, a tether 40 will be described as an embodiment. The tether 40 is shorter than the inner circumferential length of the cushion 20 so that the tongue 50 is torn when the cushion 20 is fully opened. The tether 40 has a central portion 46 of the tether 40 connected to the front main panel 22 toward the passenger of the cushion 20 and both ends 42a and 42b connected to the rear inflator 15 Respectively.

The length of the tether 40 should be shorter than the length of the inner circumferential surface of the cushion 20 so that the tether 40 may be torn before the tether 40 is tensed. And tension may be applied to the tether 40, so that the contact portion 50 may be torn.

According to another embodiment in which a plurality of tethers 40 are provided, a portion where the both ends 42a and 42b of the tether 40 are fixed and a portion where the center portion 46 of the tether 40 is fixed, The first side panel and the second side panel.

The operation of the passenger-side airbag of the vehicle according to the present invention will now be described.

FIG. 2A is a side view showing the initial deployment of the passenger's seat airbag in the vehicle according to the present invention, FIG. 2B is a sectional view showing A-A of FIG. 2A, and FIG. 2C is a partially enlarged view showing a part of FIG.

2A, when a vehicle accident occurs, a gas generating medium contained in the gas generating medium is explosively generated according to a signal of the ACU to generate a gas, and the gas generated from the inflator 15 causes the cushion 20 to expand The vent cover 30a and 30b are kept in a state in which the tether 40 does not tear the contact 50 when the passenger seat is in an abnormal seated state at the initial time, thereby functioning as an LRD vent.

2B and 2C, in which the inside of the cushion 20 can be recognized, the gas is not fully charged in the cushion 20, so that the tether 40 is also subjected to tension, The abutment 50 fixes the vent cover 30.

At this time, since the vent cover 30 is folded (F) by the function of the LRD vent, the vent holes 28a and 28b are formed so as to partially discharge the internal gas of the cushion 20 with the vent holes 28a and 28b It can be seen that some are open.

FIG. 3A is a side view showing the front passenger's seat airbag before full braking of the vehicle according to the present invention, FIG. 3B is a sectional view showing B-B of FIG. 3A, and FIG. 3C is a sectional view showing B'-B 'of FIG.

Referring to FIG. 3A, the cushion 20 is inflated at a lower pressure than the pressure at which the cushion 20 is fully expanded, but the contact 50 is broken. That is, the tether 40 is torn off in a state where tension is not yet generated.

3B and 3C, the vent cover 30a and 30b folded into the hooks 50a and 50b are folded and the vent holes 28a and 28b are completely shielded do. Here, the abutment 50 may be broken at different times by adjusting the breaking rigidity so as to shield the vent holes 28a and 28b, but it is preferable that the abutment 50 is blown as in the present invention.

FIG. 4A is a side view showing the passenger seat airbag in full bloom according to the present invention, FIG. 4B is a sectional view showing C-C of FIG. 4A, and FIG. 4C is a sectional view showing C'-C 'of FIG.

Referring to FIG. 4A, when the cushion 20 is full, the tether 40 of the tether 40 is torn and the tether 40 is spread toward the passenger by the deploying force of the cushion 20, A tension is generated.

4b and 4c, tensile force is transmitted to the vent covers 30a and 30b that shield the vent holes 28a and 28b by the tension generated in the tether 40, so that the vent holes 28a and 28b The gas inside the cushion 20 is discharged to the outside. Accordingly, the internal pressure of the cushion 20 is reduced, so that the occurrence of injury can be lowered when the passenger collides with the cushion 20.

FIG. 5A is a side view showing a collision when the passenger's seat airbag is full in the vehicle according to the present invention, FIG. 5B is a sectional view showing D-D of FIG. 5A, and FIG. 5C is a sectional view showing D'-D 'of FIG.

Referring to FIG. 5A, when the passenger collides with the cushion 20, the tension of the tether 40 decreases, and the vent covers 30a and 30b shield the vent holes 28a and 28b again.

5B and 5C, when a passenger collides with the cushion 20, the central portion 46 of the tether 40 connected to the front is pushed in the direction of collision of the inflator 15, that is, the passenger, Is lowered. The vent covers 30a and 30b are pulled by the tension generated in the tether 40 so that the gas inside the cushion 20 is prevented from being discharged through the vent holes 28a and 28b when the tension is lowered. 30a, and 30b, the vent holes 28a and 28b are shielded to maintain the internal gas at a constant pressure.

Therefore, it improves the ability to reduce injuries to passengers' injuries and head injuries related to the NCAP marketability test. In addition, by applying an active vent to the cushion, it is possible to largely control the general vent according to the change of the internal pressure without reducing the size of the general vent when the cushion is deployed. By applying the LRD vent and the general vent at the same time, , The workability is improved and there is no deviation when the cushion is deployed, the weight is reduced by simplifying the vent structure applied to the cushion, and the cushion manufacturing is performed by deleting the Thether Release Unit or the LRD vent, And the time of the process can be shortened.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

10: air bag housing 15: inflator
20: Cushion 22: Main panel
24, 26: side panel 28: vent hole
30: vent cover 40: tether
50:

Claims (10)

An inflator;
A cushion in which a gas is introduced from the inflator and developed, and a vent hole is formed to partially discharge the gas;
A vent cover installed on the cushion to open and close the vent hole;
And a tether installed along the inner circumferential surface in the direction of deployment of the cushion and installed between the vent hole and the vent cover to open and close the vent cover with a change in the internal pressure of the cushion,
The tether
A part of which is annularly adhered to cover the vent cover,
Wherein the vent cover is folded inside the ring of the tether,
Wherein the vent cover covers the vent hole by tearing the tether before the tensile force is generated when the cushion is deployed.
The method according to claim 1,
Wherein the vent hole is opened by pulling the vent cover to the center of the cushion by the deploying force of the cushion when the cushion is full.
3. The method of claim 2,
Wherein the tension of the tether is reduced in accordance with a change amount of the cushion when the cushion is full, thereby shielding the vent cover.
The method according to claim 1,
Wherein the tether is provided to be shorter than an inner circumferential length of the cushion so that when the inflator is inflated as compared with the initial deployment of the cushion, the tether is detached.
The method according to claim 1,
Wherein the central portion of the tether is connected to a front surface of the cushion facing the passenger, and both ends of the tether are connected to the rear surface of the cushion.
The method according to claim 1,
Wherein the tether is provided in at least one or more of the tether.
The method according to claim 1,
A part of the vent cover is folded a plurality of times to be fixed to the hook of the tether,
Wherein the vent hole is partly opened when the cushion is initially deployed, and a part of gas in the cushion is exhausted.
The method according to claim 1,
Wherein the vent hole is formed in a spherical shape, and the vent cover is provided so as to cover the vent hole, and is sewn except for one side and the other side where the tether passes.
9. The method of claim 8,
Wherein the vent cover is folded on one side and the other side a plurality of times so as to be disposed in a ring of the tether.
The method according to claim 1,
Wherein the vent cover and the tether are installed inside the cushion.

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