KR102251344B1 - Apparatus of airbag for vehicle - Google Patents

Abstract

The present invention relates to an airbag device of a vehicle, comprising: a first tether provided to transmit tension formed when the main chamber is inflated to a cover, and provided to reduce tension when a connection point is moved toward a vent hole according to external pressure; And a subchamber provided on a side portion of the main chamber in which the vent hole is formed to communicate with the main chamber through the vent hole, and to expand when the vent hole is opened by reducing the tension of the cover by the first tether. An airbag device for a vehicle including a vehicle is introduced.

Description

Vehicle airbag device{APPARATUS OF AIRBAG FOR VEHICLE}

The present invention relates to an airbag device for a vehicle, and more particularly, to an airbag device for a vehicle for minimizing injuries to an occupant in the event of an inclined collision of the vehicle.

The vehicle airbag system is a safety device that relieves shock by deploying an airbag cushion in the event of a collision and prevents passengers from being thrown out of the vehicle body. The vehicle airbag system includes Driver Air-Bag (DAB) and Passenger Air-Bag (PAB) that protects front passengers in a head-on collision, and Side Air-Bag (PAB) that protects the side of passengers in a side collision. -Bag, SAB) and Curtain Air-Bag (CAB).

The passenger seat airbag has the characteristic that the size of the neck injury varies greatly depending on the contact part of the airbag cushion on the passenger's head and upper body. In order to minimize the wooden hatch and maximize stability, the head and upper body of the occupant must behave ideally, but it is not easy to realize this behavior.

For export of vehicles to North America, they must pass the NCAP (North American Collision Safety Assessment) test. In particular, in a collision test with a collision body having a certain tilt angle from the front of the vehicle to the left or right based on the longitudinal direction of the vehicle, the upper body of the occupant does not move toward the front of the vehicle but behaves with a certain tilt angle. However, it is not easy to protect the occupants of this behavior with only the shape of the general front airbag.

The matters described as the background art are only for enhancing an understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the prior art already known to those of ordinary skill in the art.

KR 10-1994-0021325 A1

An object of the present invention is to provide an airbag device of a vehicle for safely protecting an occupant who has an inclination angle and moves toward the front side of the vehicle when an inclined collision of the vehicle occurs.

An airbag device for a vehicle according to the present invention for achieving the above object comprises: an inflator generating inflation gas; A main chamber positioned in front of the passenger seat, provided to be expanded by receiving inflation gas from the inflator, and having a vent hole formed on a side portion facing the center of the vehicle; A cover provided to shield the vent hole by being in close contact with the periphery of the vent hole by tension caused by the expansion of the main chamber on the inner side of the main chamber; One end is fixed to the cover and is connected to one side of the front side of the main chamber facing the boarding seat by extending from the cover in the longitudinal direction of the vehicle to transmit the tension formed when the main chamber is expanded to the cover. A first tether provided to reduce tension when the connection point is moved toward the vent hole according to external pressure; And a subchamber provided on a side of the main chamber in which the vent hole is formed and communicated with the main chamber through the vent hole, and expandable when the vent hole is opened by reducing a tension of the cover by the first tether. Includes.

The cover is fixed to the main chamber with one side positioned at the rear side of the main chamber relative to the vent hole, and the first tether is fixed to the other side positioned at the front side of the main chamber, thereby expanding the main chamber. When the tension is formed by the first tether, it may be provided so as to be in close contact with the periphery of the vent hole.

A tether guide penetrating by the first tether is provided at one side of the front side of the main chamber, and the first tether is slidably connected to the main chamber through the tether guide as a medium, from the tether guide side. It extends in the width direction of the vehicle so that the other end may be fixed to the other side of the front side of the main chamber.

The subchamber may have a cross-sectional area positioned at a rear side of the main chamber to be wider than a cross-sectional area positioned at a front side of the main chamber.

It may further include a diffuser connected to the inflator and provided as a flow path for the inflation gas flowing into the main chamber, wherein openings through which the inflation gas is injected are respectively provided toward both side portions of the main chamber.

One end is fixed to the cover, the other end is fixed to the diffuser, and the tension of the first tether is reduced so that a part of the cover is moved to the outside of the main chamber through the vent hole under the influence of the inflation gas flow. It may further include a; second tether provided so that the tension is formed accordingly.

A shielding member provided on the opening side of the diffuser, which is formed on the opposite side of the side portion where the vent hole is formed, and shields the opening by a tension formed by the second tether; I can.

When the vent hole is shielded by the cover, the subchamber may be provided in a folded state to surround a side surface of the main chamber.

A strap may be provided on an outer surface of the subchamber, and the strap may be provided to be fixed to the main chamber while the subchamber is folded to surround a side surface of the main chamber.

According to the airbag device of the vehicle as described above, it is possible to provide an airbag device of a vehicle for safely protecting an occupant having an inclination angle and moving toward the front side of the vehicle when an inclined collision of the vehicle occurs.

In particular, in addition to the main chamber that expands from the front of the occupant toward the occupant, a sub-chamber for protecting the occupant from the biased load when the occupant moves with an inclination angle is provided, so that the occupant can be safely protected even in the event of an inclined collision.

In addition, the diffuser, which serves as a flow path for the inflation gas injected into the main chamber, is provided to inject the inflation gas toward the sub-chamber during an inclined collision, thereby immediately protecting the occupant from an instantaneous inclined collision.

On the other hand, the first tether is provided to provide tension to the cover that shields the vent hole so that the subchamber is not inflated when the occupant moves in front, so that the subchamber is not inflated in a vehicle collision situation other than an inclined collision.

1 is a view showing an airbag device of a vehicle according to an embodiment of the present invention;
FIG. 2 is a diagram schematically illustrating a frontal behavior of a passenger in an airbag device of a vehicle according to an embodiment of the present invention;
FIG. 3 is a diagram schematically showing an inclination behavior of an occupant in the airbag device of a vehicle according to an embodiment of the present invention;
4 is a view showing a cover side in the airbag device of a vehicle according to an embodiment of the present invention;
5 is a view schematically showing the behavior of a cover during a frontal collision and an inclined collision in the airbag device of a vehicle according to an embodiment of the present invention;
6 is a view showing the shape of a subchamber during a frontal collision and an inclined collision in the airbag device of a vehicle according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

An airbag device for a vehicle according to the present invention includes an inflator 120 for generating inflation gas, as shown in FIGS. 1 to 5; A main chamber 150 positioned at the front side 10 of the passenger seat, provided to be expanded by receiving the inflation gas from the inflator 120, and having a vent hole 155 formed on a side portion facing the center of the vehicle; A cover 160 provided to shield the vent hole 155 by being in close contact with the periphery of the vent hole 155 by tension caused by the expansion of the main chamber 150 on the inner surface of the main chamber 150; One end 212 is fixed to the cover 160 and extends from the cover 160 in the longitudinal direction of the vehicle to be connected to one side of the front side of the main chamber 150 facing the boarding seat 20 As a result, it is provided to transmit the tension formed when the main chamber 150 is expanded to the cover 160, and when the connection point 214 is moved toward the vent hole 155 according to external pressure, the tension is reduced. 1 tether 200; And a side portion of the main chamber 150 in which the vent hole 155 is formed to communicate with the main chamber 150 through the vent hole 155, and the cover 160 by the first tether 200. It includes; a subchamber 300 provided to expand when the tension of) is reduced and the vent hole 155 is opened.

Looking specifically at this, the inflator 120 is provided to generate inflation gas, and the main chamber 150 is located at the front side 10 of the passenger seat 20 to receive inflation gas from the inflator 120 and expand it. And a vent hole 155 is formed on the side of the vehicle facing the center side.

When a vehicle collision occurs, the inflator 120 generates gas and supplies it to the main chamber 150. The main chamber 150 is the front side 10 of the passenger seat 20 and is inflated in front toward the occupant 30 by receiving the gas inflated from the inflator 120 from the inside of the dashboard.

Accordingly, when a collision situation of the vehicle occurs, it is expanded by the inflation gas and acts to alleviate the impact between the body of the occupant 30 and the vehicle body, which is momentarily moved toward the front of the vehicle.

In addition, in the main chamber 150, a vent hole 155 is formed on the side facing the center side of the vehicle in which the center fascia is located, and in case of emergency, the inflation gas is discharged into the vent hole 155, and the subchamber ( 300) to inflate.

1 to 3 schematically show the shape of the main chamber 150 expanded toward the occupant 30 from the front of the passenger seat 30 located on the side of the driver's seat.

On the other hand, the cover 160 is provided to shield the vent hole 155 by being in close contact with the periphery of the vent hole 155 by tension caused by the expansion of the main chamber 150 on the inner surface of the main chamber 150. .

Specifically, the cover 160 is preferably made of the same material as the main chamber 150 and is made of a material having high flexibility, and is provided at the periphery of the vent hole 155 in the inner space of the main chamber 150. Preferably, it is provided to form a cross-sectional area larger than the cross-sectional area of the vent hole 155 and shields the vent hole 155 to block the inflation gas from being discharged to the outside through the vent hole 155.

This cover 160 is fixed to the periphery of the vent hole 155 on the inner side of the main chamber 150 on one side as described below, and the tension according to the expansion of the main chamber 150 is transmitted to the other side, so that the vent hole It is in close contact with the periphery of 155 to shield the vent hole 155.

In FIGS. 1 to 3, in particular, a cover 160 is provided around the vent hole 155 provided in the main chamber 150 provided in front of the passenger seat located on the side of the driver's seat, and FIG. 4 shows the vent hole 155 ), the cover 160 is provided as the periphery is shown in detail.

On the other hand, the first tether 200 has one end 212 fixed to the cover 160, extending from the cover 160 and facing the front side of the main chamber 150 By being connected to one side, it is provided to transmit the tension formed when the main chamber 150 is expanded to the cover 160, and when the connection point 214 is moved toward the vent hole 155 according to external pressure, the tension is increased. It is arranged to be reduced.

Specifically, the first tether 200 is in the form of a wire having a length, and one end 212 is provided to be fixed to the cover 160, and extends from the cover 160 to work at the front side of the main chamber 150. It is connected to the side and has a shape extending in the longitudinal direction of the vehicle.

Accordingly, when the main chamber 150 is expanded due to a vehicle collision, the first tether 200 is tensioned as the separation distance between the fixed point with the cover 160 and the connection point 214 with the main chamber 150 increases. Is generated.

The tension of the first tether 200 is transmitted to the cover 160 through one end 212, and the cover 160 is transferred by the first tether 200 to the inner surface of the main chamber 150. As a result, it is in close contact with the periphery of the vent hole 155 to shield the vent hole 155.

On the other hand, in a frontal collision situation in which an object positioned in front of the vehicle and the vehicle collide in front, the occupant 30 moves toward the front side of the main chamber 150, and preferably the central part of the front side of the main chamber 150 Pressurize.

At this time, as one side of the front side of the main chamber 150, the connection point 214 with the first tether 200 is spaced apart from the position pressed from the occupant 30, due to the impact of the occupant 30 The generated linear displacement becomes a level that can be neglected in the tension formation of the first tether 200 for intimate contact with the cover 160 to the vent hole 155 side.

That is, the first tether 200 extending from the main chamber 150 in the longitudinal direction of the vehicle along the side portion located at the center side of the vehicle and connected to one side portion at the front side of the main chamber 150 is the connection point 214 It is a position spaced apart from the front central portion that is pressed by the occupant 30 and pushed to the rear side of the main chamber 150 during a frontal collision of the vehicle, and is moved toward the rear side of the main chamber 150 by the occupant 30. The level is relatively small, and the tension can be maintained at a certain level, and the cover 160 can also be provided with tension formed by the first tether 200 to shield the vent hole 155.

In FIG. 2, as a frontal collision situation of the vehicle, the occupant 30 moves toward the central part of the front side of the main chamber 150, and is spaced apart from the central part of the front side of the main chamber 150 depressed by the occupant 30. One side of the front side of the main chamber 150 in which the original position is maintained is shown.

Meanwhile, in an inclined collision situation in which a collision occurs in a direction having an inclination angle to the left or right based on the longitudinal direction of the vehicle, the upper body of the occupant 30 is left or right with respect to the longitudinal direction of the vehicle. It is deflected to and moves toward the front.

In the above case, one side of the front side of the main chamber 150 is depressed by the occupant 30 by the occupant 30. At this time, in the first tether 200, one side of the front side of the main chamber 150, which is the connection point 214 with the main chamber 150, is pushed toward the rear side of the main chamber 150, The separation distance between the connection point 214 and the cover 160 is reduced, so that the tension of the first tether 200 is rapidly reduced.

When the tension of the first tether 200 is reduced, the cover 160 no longer maintains a close contact with the periphery of the vent hole 155, and a part of the cover 160 through the vent hole 155 due to the pressure of the inflation gas is 150) It is pushed outward, and the inflation gas is discharged to the outside of the main chamber 150 through the opened vent hole 155. 3 shows a situation in which the vent hole 155 is opened as the tension of the first tether 200 is reduced by the occupant 30 of the passenger seat in the front side of the main chamber 150 due to an inclined collision. Has been.

That is, the first tether 200 is not depressed by the occupant 30 so that the front side of the main chamber 150 at which the connection point 214 with the main chamber 150 is formed is not depressed during a frontal collision of the vehicle. The tension at the level that can be in close contact with the periphery of the vent hole 155 is maintained, and the tension is reduced by the depression of one side of the front side of the main chamber 150 in the event of an inclined collision of the vehicle, so that the cover 160 is no longer a vent hole. (155) The inflation gas is discharged by opening the vent hole 155 without maintaining close contact with the periphery.

As a result, according to the shape of the first tether 200 extended and the positional relationship between the fixed point and the connection point 214, the first tether 200 maintains tension in the event of a frontal collision of the vehicle, so that the vent hole 155 is It is maintained in a shielded state, and in particular, in the event of an inclined collision of the vehicle, the tension is reduced so that the vent hole 155 is opened to discharge the inflation gas.

Meanwhile, the subchamber 300 is provided on a side surface of the main chamber 150 in which the vent hole 155 is formed, and communicates with the main chamber 150 through the vent hole 155, and the first tether 200 ) Is provided to expand when the vent hole 155 is opened as the tension of the cover 160 is reduced.

Specifically, the occupant 30 is prevented from a direct impact with the vehicle body by the main chamber 150 in a frontal collision situation of the vehicle. However, in particular, in an inclined collision situation in which an impact is applied toward the front of the vehicle from the left diagonal direction from the perspective of the occupant 30, in particular, the occupant 30 in the passenger seat located at the driver's seat side is the front side of the vehicle. The upper body moves toward the left diagonal direction.

In the above situation, the occupant 30 may not be moved to a position that can be sufficiently protected by the main chamber 150 and may be deflected toward the center of the vehicle and collide with the center fascia side. In order to prevent injury to the occupant 30 in such an inclined collision situation, the subchamber 300 is provided.

The subchamber 300 is a central side of the vehicle among both side surfaces of the main chamber 150 and is provided on a side surface facing the center fascia side. In addition, the subchamber 300 communicates with the main chamber 150 by the vent hole 155 formed on the side portion where the subchamber 300 is provided, so that when the vent hole 155 is opened, the inflation gas is discharged from the main chamber 150. Flow in and expand.

Meanwhile, preferably, one side of the subchamber 300 has a shape shared with the side of the main chamber 150 and forms a coupling relationship with each other. 1 or 3 schematically shows the shape and positional relationship of the main chamber 150 and the subchamber 300.

The subchamber 300 maintains the tension during a frontal collision of the vehicle and decreases the tension during an inclined collision of the vehicle by the behavior of the cover 160 receiving tension from the first tether 200. It is not inflated in the event of a collision, but is provided to be inflated in the case of an inclined collision. 6 schematically shows the shape of the subchamber 300 during a frontal collision and an inclined collision of the vehicle.

Accordingly, the subchamber 300 maintains a compressed state on the side of the main chamber 150 when the occupant 30 is sufficiently prevented from impacting the vehicle body by the main chamber 150 as a frontal collision of the vehicle. And, when the main chamber 150 alone cannot prevent the occupant 30 from colliding with the center fascia side as a vehicle inclined collision, the main chamber 150 is expanded from the central side side of the main chamber 150 to the front side of the main chamber 150. As the rotation toward the center of the vehicle is prevented, the impact of the occupant 30 with the vehicle body is prevented by the one side of the front side of the main chamber 150 and the sub-chamber 300.

As a result, by providing the subchamber 300 that expands during an inclined collision of the vehicle due to the behavior of the first trough and the cover 160, the occupant 30 is safely in a collision situation in which a certain inclination angle is formed from the front side of the vehicle. It can be protected.

Meanwhile, as shown in FIGS. 4 and 5, in the airbag device of a vehicle according to an embodiment of the present invention, the cover 160 is located at the rear side of the main chamber 150 with respect to the vent hole 155. One side is fixed to the main chamber 150, and the first tether 200 is fixed to the other side positioned at the front side of the main chamber 150, so that when the main chamber 150 is expanded, the first tether ( The tension is formed by 200 and is provided so as to be in close contact with the periphery of the vent hole 155.

Specifically, the cover 160 has one side portion 162 facing the rear side of the main chamber 150 in which the inflator 120 is located is fixed to the main chamber 150. One side portion 162 of the cover 160 may be integrally formed with the periphery of the vent hole 155, or may be separately provided and sewn around the vent hole 155 with a wire member or fixed using an adhesive.

Accordingly, in the cover 160, one side portion 162 is always fixed to the periphery of the vent hole 155, regardless of the tension, and in FIGS. 4 to 5, the cover 160 located at the rear side of the main chamber 150 ), one side portion 162 is secured around the vent hole 155 is schematically shown.

Meanwhile, one end 212 of the first tether 200 is fixed to the other side of the cover 160 facing the front side of the main chamber 150 in which the occupant 30 is located. That is, when tension is formed in the first tether 200 by the expansion of the main chamber 150, the other side of the cover 160 is pulled toward the front side of the main chamber 150.

At this time, according to the positional relationship between one side portion 162 of the cover 160 fixed to the main chamber 150 and the other side portion of the cover 160 pulled by the first tether 200, the first tether 200 When the tension is transmitted by ), the cover 160 is in close contact with the main chamber 150, and in particular, is in close contact with the periphery of the vent hole 155 to shield the vent hole 155.

In addition, when an inclined collision situation occurs and tension is removed from the first tether 200, the other side of the cover 160 to which the first tether 200 is fixed is allowed to move freely and is vented by the pressure of the inflation gas. It is moved to the outside of the main chamber 150 through the hole 155. Accordingly, the inflation gas flows into the subchamber 300 through the vent hole 155.

As a result, one side portion 162 facing the front side of the main chamber 150 is fixed to the main chamber 150, and one end portion 212 of the first tether 200 is fixed to the other side portion opposite to the main chamber 150, so that the cover Reference numeral 160 may open the vent hole 155 only during an inclined collision.

4 schematically shows the shape of the cover 160 viewed from the inner side of the main chamber 150, and FIG. 5 schematically shows the behavior of the cover 160 according to the change in tension of the first tether 200. Is shown as.

On the other hand, as shown in Figs. 1 to 3, in the airbag device of a vehicle according to an embodiment of the present invention, a tether guide penetrating by the first tether 200 is provided at one side of the front side of the main chamber 150 The first tether 200 extends from the cover in the longitudinal direction of the vehicle and is slidably connected to the main chamber 150 through the tether guide as a medium, and extends from the tether guide side in the width direction of the vehicle. Thus, the other end 216 is fixed to the other side of the front side of the main chamber 150.

Specifically, the first tether 200 is connected to one side of the front side of the main chamber 150, and to be connected to the first tether 200, the first tether 200 is a side portion of the front side of the main chamber 150. A tether guide is provided at the connection point 214 with ).

The tether guide is fixed to the main chamber 150 and may be provided in a shape in which a through hole is formed in the central portion. Preferably, it will be a ring-shaped ring forming a closed curve. 1 to 3 schematically illustrate a state in which a tether guide is provided in the main chamber 150.

The first tether 200 is provided to pass through the tether guide fixed to one side of the front side of the main chamber 150 and form a connection relationship with the main chamber 150 through the tether guide as a medium. Accordingly, the first tether 200 is provided so as to be slidable while passing through the tether guide, and the relative displacement with the connection point 214 of the main chamber 150 is restrained by the tether guide.

On the other hand, the first tether 200 has one end 212 fixed to the cover 160 and extends along the side of the main chamber 150 facing the center of the vehicle to pass through the tether guide while passing through the main chamber ( 150) A connection relationship with one side of the front side is formed, passes through the dead guide, and extends along the front of the main chamber 150 so that the other end 216 is fixed to the other side of the front side of the main chamber 150. In FIG. 1, a fixed point and a connection point 214 of the first tether 200 are shown.

The first tether 200 is connected to be slidably connected to one side of the front side of the main chamber 150 located at the center of the vehicle, and the other end 216 is on the opposite side to one side of the front side of the main chamber 150. By being fixed to the other side to be positioned, the tension is increased according to the depression of the central portion of the front side of the main chamber 150 by the occupant 30 during a frontal collision of the vehicle.

That is, at the front side of the main chamber 150, one side and the other side are positions that are preferably not pressurized by the occupant 30 during a frontal collision of the vehicle. As the central portion is depressed by the occupant 30, the main chamber ( The first tether 200 extending along the front side of the main chamber 150 is curved toward the rear side of the main chamber 150.

As the first tether 200 on the front side of the main chamber 150 is bent, an additional length is required from a linear shape, and the first tether 200 slides at the connection point 214 and is fixed with the cover 160 at one end. (212) is pulled. That is, the tension of the first tether 200 increases due to the depression of the central portion of the front side of the main chamber 150.

Accordingly, one side of the front side of the main chamber 150 at which the connection point 214 with the first tether 200 is formed is affected by the depression of the front side of the main chamber 150 and moves to the rear of the main chamber 150 Even if it is, a predetermined tension capable of bringing the cover 160 into close contact with the vent hole 155 by increasing the tension due to the depression of the central portion of the main chamber 150 can be maintained.

On the other hand, in the event of an inclined collision of the vehicle, the connection point 214 of the first tether 200 is moved to the rear side of the main chamber 150 as described above, and the tension of the first tether 200 is reduced. Accordingly, the vent hole 155 is opened and the subchamber 300 is expanded.

FIG. 2 shows a situation in which the central part of the front side of the main chamber 150 is depressed as a frontal collision situation of the vehicle and the tension is increased in the first tether 200. The other end of the main chamber 150 to which the other end 216 of the 200 is fixed, regardless of the position of the other side of the front side, the main chamber 150 to which one point of the first tether 200 is connected, and one side of the front side of the occupant 30 As it is depressed by the pressure of, the separation distance from the cover 160 is reduced, the tension of the first tether 200 is reduced, and the vent hole 155 is opened.

Eventually, through a tether guide, the main chamber 150 is connected to be slidably connected to one side of the front side, but the other end 216 is attached to the first tether 200 provided to be fixed with the other side of the front side of the main chamber 150. Accordingly, in the airbag device of the vehicle according to the exemplary embodiment of the present invention, the operational reliability of the subchamber 300 inflating only during an inclined collision is improved.

Meanwhile, as shown in FIG. 3, in the airbag device of the vehicle according to the embodiment of the present invention, the subchamber 300 has a cross-sectional area positioned at the rear side of the main chamber 150. It is formed wider than the cross-sectional area located on the side.

Specifically, the subchamber 300 has a larger cross-sectional area at the rear side of the main chamber 150 in which the inflator 120 is located than the front side of the main chamber 150 facing the occupant 30 side. The subchamber 300 directly relieves the impact between the occupant 30 and the vehicle body, and a load deflected to one side is applied to the main chamber 150 by an inclined collision to prevent the main chamber 150 from rotating. It also has a function to prevent.

That is, the rear side of the subchamber 300 is formed with a wider cross-sectional area than the front side in order to improve the supporting force on the front side of the main chamber 150 of the subchamber 300 to prevent rotation of the main chamber 150. This is to be improved.

On the other hand, as shown in Figs. 1 to 3, the airbag device of the vehicle according to the embodiment of the present invention is a flow path of the inflation gas that is connected to the inflator 120 and flows into the main chamber 150, wherein the inflation gas is It further includes a diffuser 130 provided with openings to be injected toward both side portions of the main chamber 150, respectively.

Specifically, at least a portion of the diffuser 130 is provided inside the main chamber 150, and is connected to the gas outlet of the inflator 120 to form an opening through which gas is discharged toward the inside of the main chamber 150. .

In particular, the openings of the diffuser 130 are formed to face both sides of the main chamber 150, and in FIGS. 1 to 3, the diffuser 130 is coupled with the inflator 120 so that the openings are formed toward both sides of the main chamber 150. The shape of is schematically shown.

Accordingly, when the main chamber 150 is inflated toward the occupant 30 from the front 10 of the boarding seat 20 without being deflected to one side, the air pressure of the inflation gas is balanced on both sides, thereby controlling the occupant 30 Make sure to wrap it securely.

In addition, when the subchamber 300 is expanded due to an inclined collision, the amount of the inflation gas directly flowing to the subchamber 300 by the opening of the diffuser 130 facing the center of the vehicle is reduced. Is increased, and rapid expansion of the subchamber 300 is possible.

Meanwhile, as shown in FIGS. 1 to 3, in the airbag device of a vehicle according to an embodiment of the present invention, one end is fixed to the cover 160, the other end is fixed to the diffuser 130, and the first tether ( A second tether provided to form tension as the tension of 200 is reduced so that a portion of the cover 160 is moved to the outside of the main chamber 150 through the vent hole 155 under the influence of the inflation gas flow. 250); further includes.

Specifically, the second tether 250 is preferably a wire provided inside the main chamber 150, like the first tether 200, one end of the first tether 200 as the other side of the cover 160 One end portion 212 of the is fixed to the position side, the other end is fixed to the diffuser 130.

In addition, preferably, the second tether 250 is formed with an extra length so that tension is not formed in a frontal collision situation of the vehicle in which the main chamber 150 is expanded. During an inclined collision of the vehicle, tension is formed by the behavior of the other end of the cover 160 that is moved to the outside of the main chamber 150 through the vent hole 155.

That is, when the other side of the cover 160 to which one end of the second tether 250 is fixed is moved to the outside of the main chamber 150, the separation distance between one end and the other end of the second tether 250 is increased. Tension is formed in the second tether 250.

As a result, the second tether 250 connects between the cover 160 and the diffuser 130, and tension is formed by the behavior of the cover 160 during an inclined collision of the vehicle, and the tension is applied to the diffuser 130 through the other end. It is designed to be delivered to. 1 to 2 show a state in which tension is not formed in the second tether 250 corresponding to a frontal collision of a vehicle, and in FIG. 3, a state in which tension is formed in the second tether 250 due to an inclined collision of the vehicle Is shown.

On the other hand, as shown in Figs. 1 to 3, the airbag device of the vehicle according to the embodiment of the present invention is provided on the opening side of the opening of the diffuser 130, which is formed on the opposite side of the side portion where the vent hole 155 is formed. And a shielding member 135 provided to shield the opening by a tension formed by the second tether 250.

Specifically, the diffuser 130 is provided with a shielding member 135 on the side of the opening facing the side portion opposite the side portion where the vent hole 155 is formed. The shielding member 135 may be provided in various positions, such as formed on the outside of the opening or on the channel side formed to face the opening, and provided in the form of a film blocking the opening, such as the cover 160, or rotated on the flow path. It may be provided in a variety of shapes, such as may be provided in the shape of a plurality of plates provided so as to be.

2 to 3 schematically illustrate a shield member 135 made of a plurality of plates provided to be rotatable on the flow path of the diffuser 130. The shielding member 135 is provided so as to rotate when tension is transmitted from the second tether 250 to shield the opening toward the opposite side of the side where the vent hole 155 is formed.

That is, the second tether 250 is provided so that the other end is preferably fixed to the shielding member 135 in the diffuser 130, and when the cover 160 is moved outside the main chamber 150 due to an inclined collision Tension is formed as one end is pulled, and this tension is particularly transmitted to the shielding member 135 through the other end, so that the shielding member 135 is operated to shield the opening.

In the event of an inclined collision of the vehicle, the subchamber 300 needs to be rapidly expanded because the air pressure at the side of the subchamber 300 is particularly strong inside the main chamber 150. Accordingly, the diffuser 130 is provided so that the opening facing the opposite side of the subchamber 300 is shielded by the shielding member 135 by the tension of the second tether 250 during an inclined collision.

As a result, the opening facing the opposite side of the subchamber 300 is shielded by the shielding member 135, so that the inflation gas is concentrated toward the opening facing the subchamber 300, Rapid expansion of the subchamber 300 may be implemented according to the ascent.

FIG. 2 shows a state in which both openings of the diffuser 130 are opened as a frontal collision situation of the vehicle, and FIG. 3 shows a state in which both openings of the diffuser 130 are opened, and in FIG. 3, a shield member ( A state in which 135 is operated to block the opening of the diffuser 130 opened toward the opposite side of the subchamber 300 is shown.

Meanwhile, as shown in FIG. 6, in the airbag device of a vehicle according to an embodiment of the present invention, when the vent hole 155 is shielded by the cover 160, the main chamber ( It is provided in a folded state so as to surround the side portion of 150).

Specifically, when the vehicle corresponds to a frontal collision situation, the occupant 30 is protected by the main chamber 150 and the subchamber 300 does not need to be expanded unnecessarily. In this case, the subchamber 300 is in a compressed state and is folded so as to be in close contact with the side portion of the main chamber 150.

6 illustrates a shape in which the sub-chamber 300 is provided in close contact along the outer surface of the main chamber 150 as a frontal collision situation of the vehicle. On the other hand, during an inclined collision of the vehicle, the subchamber 300 in close contact with the outer surface of the main chamber 150 expands as described above, and the state change of the subchamber 300 is illustrated in FIG. 6.

Meanwhile, as shown in FIG. 6, in the airbag device of a vehicle according to an embodiment of the present invention, a strap 320 is provided on an outer surface of the subchamber 300, and the strap 320 is the subchamber 300 ) Is provided to be fixed to the main chamber 150 in a folded state to surround the side portion of the main chamber 150.

Specifically, the subchamber 300 is provided with a strap 320 in the form of a string, and the strap 320 is fixed to the outer surface of the main chamber 150 in a state in which an inclined collision of the vehicle is not made. That is, the strap 320 is fixed to the outer surface of the main chamber 150 while the subchamber 300 is in close contact with the outer surface of the main chamber 150, so that the shape of the subchamber 300 is maintained. .

On the other hand, when an inclined collision of the vehicle occurs, the subchamber 300 is expanded by the atmospheric pressure of the inflation gas provided from the vent hole 155, and the strap 320 is the main chamber due to the expansion force of the subchamber 300. The lock with 150 is released and free movement is possible.

6 shows a fixed state and an unlocked state of the strap 320, and as a result, the strap 320 maintains the fixed state of the subchamber 300 to prevent malfunction of the subchamber 300 and convenience in space utilization. Is to improve.

150: main chamber 155: vent hole
200: first tether 300: subchamber

Claims (9)

An inflator generating inflation gas;
A main chamber positioned in front of the passenger seat, provided to be expanded by receiving inflation gas from the inflator, and having a vent hole formed on a side portion facing the center of the vehicle;
A cover provided to shield the vent hole by being in close contact with the periphery of the vent hole by tension caused by the expansion of the main chamber on the inner side of the main chamber;
One end is fixed to the cover, and is provided to transmit a tension formed when the main chamber expands to the cover by being connected to one side of the front side of the main chamber extending from the cover and facing the boarding seat, and a connection point A first tether provided to reduce tension when it is moved toward the vent hole according to external pressure; And
A subchamber provided on a side surface of the main chamber in which the vent hole is formed, communicates with the main chamber through the vent hole, and expands when the vent hole is opened by reducing the tension of the cover by the first tether; Including,
A diffuser connected to the inflator and configured to flow into the main chamber, wherein openings through which the inflation gas is injected are respectively provided toward both side portions of the main chamber, and
One end is fixed to the cover, the other end is fixed to the diffuser, and the tension of the first tether is reduced so that a part of the cover is moved to the outside of the main chamber through the vent hole under the influence of the inflation gas flow. The airbag device of the vehicle further comprising a; second tether provided to form a tension according to the tension. The method of claim 1,
The cover has one side positioned at the rear side of the main chamber with respect to the vent hole is fixed to the main chamber, and the first tether is fixed to the other side positioned at the front side of the main chamber, thereby expanding the main chamber. When the tension is formed by the first tether, the airbag device of the vehicle, characterized in that provided so as to be in close contact with the periphery of the vent hole. The method of claim 1,
A tether guide penetrating by the first tether is provided at one side of the front side of the main chamber,
The first tether extends from the cover in the longitudinal direction of the vehicle and is slidably connected to the main chamber through the tether guide as a medium, and the other end extends in the width direction of the vehicle from the tether guide side so that the other end is in front of the main chamber. Airbag device of a vehicle, characterized in that fixed to the other side of the side. The method according to claim 1,
The airbag device of a vehicle, wherein the subchamber has a cross-sectional area positioned at a rear side of the main chamber and is formed to be wider than a cross-sectional area positioned at a front side of the main chamber. delete delete The method according to claim 1,
A shielding member provided on a side of the opening of the diffuser on the opposite side of the side portion where the vent hole is formed, and shielding the opening by a tension formed by the second tether; An airbag device for a vehicle, characterized in that. The method according to claim 1,
And the subchamber is provided in a folded state to surround a side surface of the main chamber when the vent hole is shielded by the cover. The method of claim 8,
And a strap is provided on an outer surface of the subchamber, and the strap is provided to be fixed to the main chamber while the subchamber is folded to surround a side surface of the main chamber.

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