WO2018084479A1

WO2018084479A1 - Vehicle driver seat airbag device

Info

Publication number: WO2018084479A1
Application number: PCT/KR2017/011715
Authority: WO
Inventors: 유완동; 김치호; 정용현; 함정식
Original assignee: 아우토리브 디벨롭먼트 아베
Priority date: 2016-11-03
Filing date: 2017-10-23
Publication date: 2018-05-11
Also published as: KR101888129B1; KR20180049623A

Abstract

A vehicle driver seat airbag device comprises a main airbag, a sub airbag, and a restriction device. The main airbag is mounted on a steering wheel of a vehicle so as to be inflated, due to a vehicle collision, between the steering wheel and a driver sitting in a driver seat of the vehicle. The sub airbag is additionally inflated toward the driver from the rear of the main airbag. The restriction device selectively inflates the sub airbag according to a vehicle collision mode or a driver condition. Therefore, the sub airbag is selectively inflated according to the body size of the driver or the vehicle collision mode such that an effect of protecting the driver, specifically reducing brain damage to the driver, is increased.

Description

Driver's seat airbag device of automobile

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver's seat airbag apparatus for protecting a driver by deploying between a steering wheel and a driver during a sudden deceleration of the vehicle due to a collision.

An automobile airbag device is a safety device that protects occupants by rapidly inflating an airbag by injecting gas into the airbag according to a signal of a shock sensor in the event of a car crash.

In general, the driver's seat airbag is mounted concentrically to the steering wheel and is configured to rapidly inflate the airbag in response to rapid deceleration of the vehicle.

The conventional initial driver's seat airbag is inflated in a substantially ball shape when the airbag is inflated, so that the lower part of the airbag does not sufficiently cover the lower part of the steering wheel, thereby causing injury to the driver's chest hitting the steering wheel.

In order to solve such a problem, conventionally, a configuration has been proposed in which a tether member is additionally installed inside the airbag to constrain the central expansion thickness of the airbag to cover the lower part of the steering wheel.

Depending on the driver's condition in the driver's seat, for example, various body sizes, weights, seating positions, or collision scenarios in the car, the distance or driver behavior between the inflated airbag and the driver may vary, in which case the airbag will provide the desired protection. I can't show it. Therefore, there is a need for research on airbags that can respond appropriately to various driver conditions and collision modes.

Currently, countries around the world are enacting automobile safety laws that are appropriate for their own situation to ensure minimum vehicle safety. In addition, new car safety evaluations are conducted separately from the regulations to satisfy higher vehicle safety requirements of consumers by country or region. The New Car Assessment Program (NCAP) is being developed and implemented. Although the new car safety evaluation program is not legally mandated, it is more influential as a standard for comparing safety performance between vehicles when consumers purchase new cars as a test method and differentiated safety performance evaluation methods that are stronger than the regulations. This new car safety test was first conducted in 1979 in the United States (USNCAP) and gradually expanded to Europe (Euro NCAP), Japan (JNCAP), Australia (ANCAP), Korea (KNCAP), and China (CNACP).

For example, the US new vehicle safety assessment method uses a vehicle seated on a driver's seat with a male III 50 ^th percentile male (H350) and a female III 5 ^th percentile female (H305) at a speed of 56 kph. Tow and hit the fixed wall. At this time, the head, neck, chest and thigh scores are calculated using the data measured from the sensors mounted on the dummy.

The average male adult (Hybrid III 50 ^th percentile Male) represents an average male of 175 cm in height and 78 kg in weight, and the female adult small dummy (Hybrid III 5 ^th percentile Female) measures 152 cm in height and 54 kg in weight. Represent.

US Federal Motor Vehicle Safety Standard 208 (FMVSS 208) calls for a frontal collision rule with hybrid III piles.

The above-mentioned piles are mainly made of metal, foam rubber and plastic. Hybrid III, the most advanced dummy model so far, is equipped with 40 measuring sensors such as accelerometers and sensors on the head, neck, chest, spine, pelvis and legs.

However, the recently commercialized next generation dummy, the Thor 50 ^th percentile male dummy, is the same size as the hybrid 50 ^th percentile male dummy but is biomechanically closer to humans. The fixed shoulders moved flexibly and the sensor section increased to 125. As such, new introductions are under consideration.

For example, the National Highway Traffic Safety Administration (NHTSA) recently announced new changes for its new vehicle safety assessment program. These changes affect the three collision modes of full face collision, side slope pole collision, and side MDB collision, and further include a front slope collision test.

In the full frontal crash test, the driver seated the THOR 50 ^th percentile male dummy in the driver's seat, seated the HYBRID III 5 ^th percentile female in the front passenger seat, and the 56 Km female adult dummy in the front passenger seat. Tow at / h and hit the fixed wall.

In an oblique moving deformable barrier (OMDB), an oblique moving deformable barrier (OMDB) collides with a stationary vehicle at a 15-degree angle, overlapping 35% of the front side of the vehicle. The OMDB weighs 2486 Kg and has a wider face plate, suspension, and a new Honeycomb barrier. In this OMDB test, the driver's and passenger's seats are seated with a THOR 50 ^th percentile pile and the OMDB is crashed into a stationary car at 90 km / h.

As described above, a variety of countries including the United States are introducing a vehicle evaluation method using a new THOR pile, and the development of an air bag that can be appropriately responded to is required.

[Preceding technical literature]

(Patent Document 1) Japanese Utility Model Publication No. 61-11084

(Patent Document 2) US Patent No. US 6,626,459

An object of the present invention is to provide a driver's seat airbag device that effectively constrains the driver's head by implementing the subchamber to be selectively inflated from the rear side of the main airbag according to the collision mode of the vehicle or the condition of the driver (dummy).

Another object of the present invention is to provide a driver's seat airbag device which improves the deployment shape of the subchamber and prevents the driver's upper chest portion from being injured by the inflated airbag.

According to an embodiment of the present invention to achieve the above object, the main airbag is mounted on the steering wheel of the vehicle and inflated and deployed between the steering wheel and the driver seated in the driver's seat of the vehicle when inflated due to the collision of the vehicle ; A sub airbag that extends from the rear of the main air bag toward the driver and expands; A driver seat airbag device for a vehicle is provided that includes a restraining device for selectively inflating the sub airbag according to the collision mode of the vehicle or the driver condition.

The restraint device may include a tension member having one end connected to the sub air bag and the other end fixed to an inflator connection side of the front side of the main air bag; A cutter device for cutting the tether member; And a controller for selectively operating the cutter device according to the collision mode of the vehicle or the driver condition.

The tension member includes a plurality of tether members disposed radially from the center of the sub air bag, each end of which is connected to the sub air bag; An auxiliary support member for restraining the other end of each tether member; And one end is connected to the auxiliary support member, the other end may include a support tether fixed to the inflator connecting portion side.

The sub airbag may extend concentrically with the main airbag so that the side shape thereof may have a trapezoid when the main airbag and the sub airbag are inflated.

The sub airbag may be configured to inflate toward the driver while making a step from a lower end of the main airbag when inflated.

The controller may be configured to cut the tension member by operating the cutter device in the front oblique collision mode of the vehicle.

The controller may be configured to allow the driver to cut the tension member by operating the cutter device in a Hybrid III 50 ^th percentile male dummy or THOR 50 ^th percentile male dummy condition.

The controller may be configured to determine the seating position of the driver according to a signal of a position sensor for detecting the position of the driver's seat, and selectively cut the tension member by selectively operating the cutter device according to the seating position of the driver. have.

According to an embodiment of the present invention, the driver's seat airbag is composed of a main airbag and a sub airbag additionally inflated at the rear side of the main airbag to selectively inflate the sub airbag according to a driver's condition or a collision situation of a vehicle, and thus The driver can be adequately protected according to the driver's conditions.

According to an embodiment of the present invention, when inflated, the sub airbag has a trapezoidal side shape, or is inflated in a stepped shape further protruding rearward from the bottom of the main airbag by a predetermined distance so that the driver's chest is inflated. Injury by the airbag can be prevented.

1 is a side view for explaining the configuration of a driver's seat airbag device according to the present invention;

Figure 2 is a front view showing a state in which the driver viewed the inside of the car inflated driver's seat airbag according to the present invention,

3 is a cross-sectional view taken along line III-III of FIG. 2,

4 is a cross-sectional view showing a state in which the sub airbag is further inflated from the main airbag of FIG.

5 is a side view illustrating a state in which the main airbag and the sub-airbag of the driver's seat airbag apparatus according to the present invention are inflated together to restrain the driver;

6 is a perspective view illustrating a state in which the main airbag and the sub-airbag of the driver's seat airbag apparatus according to the present invention are inflated together to restrain the driver;

7 is a front view showing the configuration of another driver's seat airbag device according to the present invention;

8 is a sectional view taken along the line VIII-VIII in FIG.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

Hereinafter, reference numeral U denotes the upward direction of the vehicle, reference numeral L denotes the downward direction of the automobile, reference numeral F denotes the front direction of the automobile, and reference numeral R denotes the rear direction of the automobile.

Figure 1 is a side view for explaining the configuration of the driver's seat airbag apparatus according to the present invention, Figure 2 is a front view showing a state in which the driver viewed the inflated driver's seat airbag according to the present invention from the inside of the vehicle.

1 and 2, the driver's seat airbag device 1 is mounted in the steering wheel 2 on the driver's seat side of the vehicle. The driver's seat airbag device 1 is connected to the driver's seat airbag 100 (hereinafter referred to as an airbag) mounted on the housing 5 in the steering wheel 2 and the airbag 100, so that the airbag 100 is connected to the steering wheel ( 2) and an inflator 7 for supplying gas to expand between the drivers O1 and O2.

The airbag 100 includes a main airbag 110 and a sub airbag 130.

The main airbag 110 is inflated so as to cover the steering wheel 2 basically when inflated so as to be interposed between the drivers O1 and O2 and the steering wheel 2 so that the

drivers

01 and 02 can rotate the steering wheel 2. To avoid being hit.

The sub airbag 130 is further inflated rearward from the rear of the main airbag 110. The sub airbag 130 is selectively inflated and deployed according to the operation of the restraint device 170. The sub airbag 130 is selectively inflated and deployed according to the collision mode of the vehicle or the driver condition.

The restraining device 170 includes a tension member 171, one end of which is connected to the sub airbag 130 and the other end of which is fixed to the inflator 7 connection side of the front side of the main airbag 100; A cutter device 175 for cutting the tension member 171, and a controller 177 for selectively operating the cutter device 175 according to the collision mode of the vehicle or the driver conditions.

The tension member 171 includes a plurality of tether members 172 disposed radially from the center of the sub air bag 130 and each end of which is connected to the sub air bag 130; And an auxiliary support member 173 for restraining the other end of each tether member 172, and a support tether 174 having one end connected to the auxiliary support member 173 and the other end fixed to the inflator 7 connection side. do.

The vehicle crash mode may include a front oblique crash mode. The front oblique collision mode is a front impact in which an angled impact is generated at a front portion of a vehicle and the impact is applied to a relatively narrow portion at the front left or right side of the vehicle. In such a collision, the center of the vehicle rotates, causing a departure from the moving line. In this case, the driver inside the vehicle may be moved forward with the vector having the front and side components, and the head of the driver may rotate to increase the brain injury (BrIC).

Driver conditions may include various factors such as the size, weight or seating position of the passenger.

According to the present invention, the driver's seat airbag device 1 includes a driver's seat position sensor 191 for detecting the above-described driver condition, a vehicle collision mode sensor 193 for detecting a collision situation of a vehicle, and a driver's seat position sensor 191. And the controller 177 selectively operates the cutter device 175 based on the signal from the vehicle collision mode detection sensor 193.

For example, if the driver is a female or a male, for example, equivalent to a female III 5 ^th percentile female (hereinafter referred to as a small driver O1), the small driver O1 moves the driver's seat to the front of the vehicle. Pulled. In this case, the body including the head H1 of the driver O1 is relatively moved toward the front of the vehicle F, and the seating position of the driver O1 is sensed by the driver's seat position sensor 191. .

In this state, the controller 177 controls the cutter device 175 to be inactivated when the airbag 100 is inflated due to the collision of the vehicle. Accordingly, as the cutter device 175 is deactivated, the support tether 174 and the tether member 172 are deployed to the rear of the vehicle by a predetermined distance while the main air bag 110 is inflated and deployed to the rear of the vehicle. On the other hand, the support tether 174 and the plurality of tether members 172 deployed to the rear of the vehicle by a predetermined distance is kept in a tensioned state, the sub-airbag 130 is pulled to the front (F) by the tension force Is constrained.

Accordingly, the sub airbag 130 maintains a non-inflated state to adequately protect the driver O1 having a relatively small body size. That is, even if only the main airbag 110 is inflated, the distance between the inflated main airbag 110 and the driver O1 that moves relative to the front of the vehicle and is seated can be properly maintained to protect the driver O1.

On the other hand, when the driver generally has a physique comparable to, for example, a male adult average dummy or a THOR 50 ^th percentile male dummy (hereinafter referred to as a large driver O2), the driver O2 relatively moves to the rear of the car and is seated. Will be done. In this case, the head H2 of the driver O2 is in a state of being moved to the rear of the vehicle by a predetermined distance L1 from the head H1 of the small driver O1. The seating state of the driver O2 may be detected by the driver's seat position sensor 191.

In this state, when the airbag 100 is inflated due to a car crash, the controller 177 controls the cutter device 175 to be activated. As the cutter device 175 is operated according to the control signal of the controller 177, the support tether 174 is cut, and the tensile force of the plurality of tether members 172 is released.

As a result, the gas in the main airbag 110 presses the sub airbag 130 portion toward the rear of the vehicle, thereby further inflating the sub airbag 130 from the main airbag 110 to the rear of the vehicle.

That is, the support airbag 150 and the sub airbag 130 are additionally inflated between the driver O2 and the inflated main airbag 110 that are moved by a certain distance to the rear of the vehicle due to the large body size. Is quickly received by the sub airbag 130. Therefore, the head of the driver O2 having a large body size can be quickly restrained to prevent the head H2 of the driver O2 from rotating while moving in front of the vehicle, thereby reducing the driver's brain injury.

In particular, as the sub-airbag 130 is further inflated, the head H2 of the driver O2 is quickly restrained and the head H2 is prevented from rotating about the width axis of the vehicle, thereby preventing the head of the driver O2. Injury value can be effectively reduced.

The vehicle collision mode detection sensor 193 detects a collision state of a vehicle when the vehicle crashes. For example, the collision mode detection sensor 193 detects a front tilt collision state of the vehicle.

The front oblique collision may include a case in which an impact is made at an angle at the front of the vehicle and overlaps with a portion of the front of the automobile at about 40% or less. Such a collision tends to cause the center of the vehicle to rotate and to deviate from the line of movement, and can be moved forward and rotated with a vector having components of the driver's head front and side. This tendency can lead to a higher brain injury on the occupants.

In one embodiment of the present invention, such a collision situation is detected by the vehicle collision mode detection sensor 193 and transmitted to the controller 177. The controller 177 operates the cutter device 175 to cut the support tether 174. As a result, the main airbag 110 and the sub airbag 130 may be inflated together to quickly restrain the driver's body, particularly the head of the driver, to perform a driver protection function.

The cutter device 175 may be operated to detect the driver's condition, for example, a body size, weight, and a seating state, in the above-described vehicle front tilt collision situation, such that the sub airbag 130 is inflated.

For example, when the driver O2 corresponding to the male adult average pile or the THOR 50 ^th percentile male pile is seated in the driver's seat while the vehicle front tilt collision situation is detected through the collision detection sensor 193, the controller 177 ) Operates the cutter device 175 to further inflate the sub airbag 130.

On the other hand, even when a vehicle inclination collision situation is detected through the collision sensor 193, when the small driver O1 corresponding to the female adult small dummy is seated in the driver's seat, the controller 177 deactivates the cutter device 175. It can be controlled so that only the main airbag 110 is inflated. When the sub airbag 130 is further inflated while the small driver O1 is seated, the head H1 of the small driver O1 may be injured by the inflating force of the sub air bag 130, so In this case, the cutter device 175 is deactivated so that the sub airbag 130 maintains a non-inflated state.

The driver's seat position sensor 191 and the vehicle collision mode sensor 193 may be changed in various forms and may be selectively employed. On the other hand, in detecting the driver's condition, in addition to the driver's seat position sensor 191 described above, it may be based on various methods of detecting the weight, size, etc. of the driver.

According to the present invention as described above, the US Federal Motor Vehicle Safety Standard 208 (FMVSS 208) and the National Highway Traffic Safety Administration (NHTSA) provide a driver's seat airbag device that can satisfy the requirements of the recent new car safety evaluation program. can do. The driver's seat airbag device of the present invention can satisfactorily satisfy the safety standards and compliance with the new car safety evaluation program required by various countries outside the United States.

3 is a cross-sectional view taken along the line III-III of FIG. 2, showing a state for restraining the small driver O1.

1 and 3, when the small driver O1 is seated, the cutter device 175 is deactivated so that the sub-airbag 130 has a tether member 172, an auxiliary support member 173, and a support tether 174. When constrained by the tensile force of), the portion where the sub airbag 130 on the rear side of the main airbag 110 is located may maintain a concave shape. In this case, the head H1 of the driver O1 may be accommodated in the concave portion R and restrained from being thrown to the side of the vehicle crash.

FIG. 4 is a cross-sectional view illustrating a state in which the sub airbag is further inflated from the main airbag of FIG. 3, and illustrates a state for protecting the large driver O2.

1 and 4, when the large driver O2 is seated in the driver's seat, the controller 177 operates the cutter device 175 to cut the support tether 174. As the support tether 174 is cut, the tension force of the tether members 172 is released to further expand and expand the sub airbag 130 toward the rear of the vehicle by the gas pressure in the main airbag 110.

At this time, the side shape of the inflated main air bag 110 and the sub air bag 130 has a substantially trapezoidal shape. Pressing the upper chest part of the large driver O2 by this development shape is eliminated.

The following describes the operation of the driver's seat airbag device configured as described above.

1 to 3, when a small driver O1 corresponding to a female III 5 ^th percentile female is seated in the driver's seat, the driver's seat position sensor 191 detects a position of the driver's seat. Here, the driver's seat position sensor 191 may correspond to a track position sensor applied during a crash test.

In the case of a small driver O1, the seat is moved closer to the steering wheel 2 as it is seated while moving toward the front F of the vehicle.

In this case, the controller 177 controls the cutter device 175 to be inactivated. As a result, the gas generated from the inflator 7 is supplied into the main air bag 110, and the main air bag 110 is inflated toward the small driver O1. At this time, one end of the plurality of tether member 172, which is the tension member 171 is connected to the inner surface of the sub airbag 130, the other end is supported by the auxiliary support member 173, the auxiliary support member 173 is a support tether ( The sub airbag 130 is connected to the tether member 172, the auxiliary support member 173, and the support tether 174 by being indirectly connected to the inflator 7 connection side of the main airbag 110 by 174. Constrained to prevent expansion.

As a result, the head H1 of the small driver O1 moving forward of the vehicle due to the vehicle crash is substantially constrained by the expansion of the main carry bag 110. In the case of the small driver O1, the seat is relatively restrained by the main airbag 110 as it is seated in a state of being moved by a predetermined distance to the front of the vehicle.

A recessed concave portion R toward the front of the vehicle is formed at the rear of the main air bag 110 by the sub airbag 130 constrained by the tether member 172, the auxiliary support member 173, and the support tether 174. Can be achieved. With such a configuration, the head H1 of the driver O1 protruding toward the front of the vehicle is accommodated to further prevent the head H1 of the driver O1 from slipping off the main airbag 110.

5 is a side view illustrating a state in which the main airbag and the sub airbag of the driver's seat airbag device are inflated together to restrain the driver, and FIG. 6 is the main airbag and the sub airbag of the driver's seat airbag device inflated together. It is a perspective view which shows the state which restrains a driver.

1, 4 to 6, when a large driver O2 corresponding to a hybrid III 50 ^th Percentile male or a THOR 50 ^th percentile male dummy is seated in the driver's seat, the driver O2 Since the weight and height are larger than the driver O1, the driver's seat is pushed backward to be seated. In that case, the distance between the steering wheel 2 and the large driver O2 is longer by a certain distance L1 than the distance between the steering wheel 2 and the small driver O1.

In this case, the controller 177 operates the cutter device 175, and the cutter device 175 cuts the support tether 174. As a result, the restraining force of the sub airbag 130 is released and the sub airbag 130 expands and expands toward the driver O2 by the gas pressure in the main airbag 110.

Thus, the head H2 of the driver O2 is accommodated in the sub-airbag 130 and quickly restrained, thereby preventing it from moving and rotating in front of the vehicle. As the head H2 of the driver O2 is initially restrained by the sub airbag 130, the head H2 of the driver O2 may be prevented from rotating about the axis of the vehicle width direction, thereby greatly reducing the injury hatch. have.

Meanwhile, when the main airbag 110 and the sub airbag 130 are inflated, the side shape of the main airbag 110 and the sub airbag 130 may have a trapezoidal shape, thereby eliminating the pressurization of the chest of the driver O2. Therefore, it is possible to prevent injuries caused by the inflated air bag 100 of the driver O2.

FIG. 7 is a front view showing the configuration of another driver's seat airbag device according to the present invention, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

7 and 8, the sub airbag 130 may be provided in an eccentric state from the center of the main airbag 110. According to an exemplary embodiment of the present invention, the sub airbag 130, when inflated, further protrudes from the main airbag 110 to the rear end at a position that is raised by a predetermined distance (D) from the bottom of the main airbag (110) 100) may be configured to expand to have a substantially stepped shape.

In this configuration, the sub airbag 130 is configured to partially avoid the lower region of the main airbag 110 to substantially receive the head H2 of the large driver O2, and the chest of the driver 02 to the airbag 100. To prevent pressurization.

Although the circular sub airbag 130 is illustrated in FIGS. 7 and 8, the shape of the sub air bag 130 may be variously modified.

In this way, the sub airbag 130 may be configured to be smaller than the main air bag 110, so that the sub air bag 130 may be further inflated under the main air bag 110, so that the head H12 of the driver O2 may serve as a sub airbag 130. The airbag 130 may be quickly restrained to reduce the injury to the brain, and at the same time, the chest of the driver O2 may be pressed to prevent injury.

According to the airbag 100 of the present invention as described above, for example, the US Federal Motor Vehicle Safety Standard 208 (FMVSS 208) and the National Highway Traffic Safety Administration (NHTSA) will satisfy both of the recent new car safety evaluation programs. Can be.

For example, if a hybrid III 50 ^th percentile male pile or THOR 50 ^th percentile male pile is seated in the driver's seat in accordance with the US Federal Motor Vehicle Safety Standard 208 and the US New Vehicle Safety Assessment Program, the front tilting crash test is performed. By activating the main airbag 110, the sub-airbag 130 may be inflated to quickly restrain the head of the Hybrid III 50 ^th percentile male pile or THOR 50 ^th percentile male pile.

When testing a hybrid III 5 ^th percentile female seated in the driver's seat in accordance with one frontal test condition of US Federal Motor Safety Standard 208, the cutter unit 175 is deactivated and only the main airbag 110 is inflated. Can be deployed.

When the THOR 50 ^th percentile male dummy is seated and tested in the driver's seat according to the frontal test conditions required by the US New Vehicle Safety Assessment Program, the main airbag 110 and the sub airbag 130 are inflated by activating the cutter device 175. You can do that.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto, and is defined by the following claims. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the appended claims.

The present invention comprises the driver's seat airbag as a main airbag and a sub-airbag further inflating at the rear side of the main airbag to selectively inflate the sub-airbag according to the driver's condition or the collision situation of the car to assist the driver according to various crash situations and driver conditions. Applied to the driver's seat airbag device technology of adequate protection.

Claims

A main air bag mounted on a steering wheel of the vehicle and inflated and deployed between the steering wheel and a driver seated in the driver's seat of the vehicle when the vehicle collides with the vehicle;

A sub airbag that extends from the rear of the main air bag toward the driver and expands;

And a restraining device for selectively inflating the sub airbag according to the collision mode of the vehicle or the driver condition.
According to claim 1, The restraint device is one end is connected to the sub air bag and the other end is fixed to the inflator connecting portion side of the front side of the main air bag;

A cutter device for cutting the tension member; And

And a controller for selectively operating the cutter device according to the collision mode of the vehicle or the driver condition.
3. The apparatus of claim 2, wherein the tension member comprises: a plurality of tether members radially disposed from a center of the sub air bag and each end of which is connected to the sub air bag;

An auxiliary support member for restraining the other end of each tether member; And

One end is connected to the auxiliary support member, the other end of the driver's seat airbag device including a support tether fixed to the inflator connecting portion side.
The driver's seat airbag device of claim 2, wherein the sub airbag extends concentrically with the main airbag, and has a trapezoidal side shape when the main airbag and the subairbag are inflated.
The vehicle airbag apparatus of claim 2, wherein the sub airbag further protrudes rearward from a position moved upward by a predetermined distance from a lower end of the main airbag.
The driver's seat airbag device of claim 2, wherein the controller is configured to operate the cutter device to cut the tension member in the front oblique collision mode of the vehicle.
3. The driver's seat airbag device of claim 2, wherein the controller is configured to operate the cutter device to cut the tension member in a Hybrid III 50 th percentile male dummy or a THOR 50 th percentile male dummy condition.
The tension member of claim 2, wherein the controller determines a seating position of the driver according to a signal of a position sensor for sensing the position of the driver's seat, and selectively operates the cutter device according to the seating position of the driver. The driver's seat airbag device configured to cut the car.