KR20200130765A - Airbag apparatus of vehicle - Google Patents

Abstract

The present invention relates to a vehicular airbag apparatus comprising: an airbag cushion which is formed in the shape of a shawl to cover and restrain the entire upper body of an occupant around the shoulders in case of a collision of a vehicle and is deployed toward both sides of the occupant and the fronts of the his/her head and neck; and an inflator which generates gas in response to an impact detection signal in case of the collision of the vehicle and supplies the gas to the airbag cushion. The airbag cushion is installed on the backrest of a seat on which the occupant is seated, and includes first and second cushions that are inflated and deployed forward, upward, and downward from both sides of the backrest, and a third cushion that is connected to any one of the first and second cushions and expanded and deployed to the fronts of the head and neck of the occupant. When the vehicle collides, the vehicular airbag apparatus can protect safely the occupant by restraining both the sides and the front of the occupant and the head and the neck around the shoulders of the occupant.

Description

Airbag device of automobile {AIRBAG APPARATUS OF VEHICLE}

The present invention relates to an airbag device of a vehicle, and more particularly, to an airbag device of a vehicle that expands and expands when a vehicle crashes to restrain and protect an occupant.

In general, a vehicle airbag device is a safety device that protects an occupant by rapidly inflating the airbag by injecting gas into the airbag according to a signal from an impact sensor when a vehicle crashes.

Such an airbag device is installed on a steering wheel, dashboard, seat, side wall, etc. provided in a vehicle, and is inflated toward the front or side of the occupant when a vehicle crashes to protect the occupant.

That is, a front airbag deployed in front of a driver's seat and a passenger seat, a curtain airbag and a side airbag deployed from the side of the passenger to protect the passenger, and a knee airbag to protect the passenger's knee may be provided in the automobile.

On the other hand, recently, self-driving cars have been developed that move by themselves even if the driver does not drive the vehicle.

The autonomous vehicle detects each device provided in the vehicle and the situation around the vehicle using a high-tech sensor capable of recognizing surrounding objects and a high-performance graphic processing device, and controls the driving of each device provided in the vehicle according to the detection result. To drive.

The state-of-the-art sensor measures the distance between an object and an object like a person, detects danger, and helps to see all areas without blind spots. In addition, the graphic processing device identifies the surrounding environment of the vehicle through several cameras, analyzes the image, and helps the vehicle to drive safely.

For example, an autonomous vehicle may be equipped with LiDAR equipment, sound wave equipment, 3D cameras, radar equipment, and the like.

In the autonomous vehicle configured as described above, as the driver does not need to drive, the entire seat including the driver's seat rotates freely, and the angle of the backrest is adjusted to a horizontal state by a tilting operation.

The occupant can adjust the angle of the backrest in various ways, and the seat can be rotated to face the occupant in the rear seat for a meeting.

Therefore, it is impossible to apply a general airbag device designed based on a seated posture in which the occupant is seated on the seat forward in the autonomous vehicle.

In the following Patent Document 1 and Patent Document 2, the configuration of a vehicle passenger protection system is disclosed.

Korean Patent Registration No. 10-1655569 (announced on September 8, 2016) Korean Patent Registration No. 10-1611087 (announced on April 11, 2016)

On the other hand, as passengers in an autonomous vehicle do not drive directly, they can have a meeting by rotating the seat left and right while moving to the destination, or take a break by rotating the backrest to the rear. have.

As described above, in an autonomous vehicle, the seat and the backrest can be freely rotated in the front and rear directions, and thus the direction and posture of the occupant may be variously changed.

In addition, when a vehicle crashes, objects or damaged parts inside the vehicle fly, causing injury to the occupants.

Accordingly, there is a need for an airbag technology capable of safely protecting the occupant regardless of the direction and posture of the occupant in the event of a vehicle collision.

In addition, in recent years, related regulations have been strengthened to effectively restrain and safely protect the head and neck of the occupant in the event of a car crash.

Accordingly, there is a need for the development of a technology that can securely protect the occupant by restraining the occupant by expanding and deploying it in the front, near and far side of the occupant, the pelvis, buttocks, and head and neck of the occupant.

An object of the present invention is to solve the above-described problems, and to provide an airbag device for a vehicle capable of protecting the occupant safely by inflating and deploying the airbag on both sides and front of the occupant and the front of the head and neck during a collision Is to do.

Another object of the present invention is to provide an airbag device for a vehicle that can safely protect an occupant regardless of the attitude of the occupant in an autonomous vehicle.

Still another object of the present invention is to provide an airbag device for a vehicle capable of protecting the occupant's head and neck as well as the occupant's abdomen and pelvis.

In order to achieve the above object, the airbag device of a vehicle according to the present invention is formed in a shawl shape so as to wrap and restrain the entire upper body around both shoulders of the occupant during a collision of the vehicle, and And an airbag cushion deployed toward the front of the vehicle and an inflator for supplying gas to the airbag cushion by generating gas by an impact detection signal when a vehicle collides, wherein the airbag cushion is installed on the back of the seat on which the occupant is seated, and First and second cushions that expand and expand forward and upward and downward from both sides and a third cushion that is connected to any one of the first and second cushions, and expands and deploys to the front of the head and neck of the occupant. It features.

As described above, according to the airbag device of the vehicle according to the present invention, the shawl-shaped airbag cushion installed on the backrest of the seat is inflated and deployed when the vehicle is collided, so that both sides and the front and the head and neck of the occupant are centered on both shoulders of the occupant. The effect of being able to protect the occupants safely by restraining the part is obtained.

That is, according to the present invention, it is possible to effectively restrain the occupant's head and neck by expanding and deploying the third cushion toward the front of the occupant's head and neck from either the first and the second cushion deployed on both sides. The effect is obtained.

Accordingly, according to the present invention, when a vehicle crashes, the occupant's head and upper body move forward, and the injuries of the occupant due to collision with in-vehicle equipment such as the steering wheel, dashboard, and windshield can be prevented in advance. Is obtained.

In addition, according to the present invention, it is possible to prevent injury to the occupant caused by colliding with the head or neck of the occupant while the article inside the vehicle is in flight when the vehicle collides.

Further, according to the present invention, an effect of increasing the number of the third cushion and temporarily maintaining the third cushion and the first or second cushion in a coupled state by using the coupling means is obtained.

Accordingly, according to the present invention, the occupant can be safely protected by restraining the head and neck regions along with both sides and the front surface of the occupant to block the occupant's forward movement.

In addition, according to the present invention, a pair of provided third cushions are installed at different heights, or a fourth cushion is added to the lower portion of the third cushion to cover the occupant's abdomen and pelvis together with the occupant's head and neck. The effect of being able to protect the occupants safely by enclosing and restraining them is obtained.

1 is a perspective view of an airbag device of a vehicle according to a preferred embodiment of the present invention,
2 and 3 are a clarity and a plan view of the airbag device of the vehicle shown in FIG. 1, respectively,
4 is an exploded view of the airbag cushion,
5 to 7 are exemplary views of an airbag device for a vehicle according to another embodiment of the present invention.
8 to 11 are exemplary views of an airbag device of a vehicle according to another embodiment of the present invention.

Hereinafter, an airbag device for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention expands and deploys airbag cushions on both sides and front of the upper body including the head and chest of the occupant, and the front of the head and neck of the occupant around both shoulders of the occupant. And it protects the occupants safely by restraining the entire front of the neck.

In particular, the present invention expands and deploys the airbag cushion to cover the front of the head and neck together with both sides and front of the upper body of the occupant in the event of a collision of a vehicle to protect both sides and front of the occupant as a whole, and to protect objects or damage flying in the vehicle. Injury caused by damaged parts can be prevented.

In this embodiment, the configuration of an airbag device installed in the driver's seat of a general vehicle is described, and the direction toward the front of the vehicle centering on the driver's seat is referred to as'front (F)', and the direction toward the rear of the vehicle is'rear (B). '. In addition, terms indicating directions such as'left (L)','right (R)','upward (U)' and'downward (D)' indicate respective directions based on the front and rear sides. It is defined as doing. In addition, reference numeral I shown in the drawings denotes the interior direction of the vehicle in the width direction of the vehicle, and reference numeral O denotes the exterior direction of the vehicle in the width direction of the vehicle.

Therefore, the front and rear (F, B) directions of the vehicle can be expressed in the horizontal direction, and the up and down (U, D) directions of the vehicle can be expressed in the vertical direction.

1 is a perspective view of an airbag device of a vehicle according to a preferred embodiment of the present invention, FIGS. 2 and 3 are a clarity and plan view of the airbag device of a vehicle shown in FIG. 1, respectively, and FIG. 4 is an exploded view of an airbag cushion.

The airbag device 10 of a vehicle according to a preferred embodiment of the present invention, as shown in FIGS. 1 to 4, wraps the entire upper body around the shoulders of the occupant at the time of a collision of the vehicle and restrains it, in a shawl shape. The airbag cushion 20 is formed to be deployed toward both sides and front of the upper body of the occupant and the front of the head and neck, and an inflator 21 that generates gas by an impact detection signal when a vehicle collides and supplies it to the airbag cushion 20 ).

The airbag cushion 20 expands and deploys on both sides and front of the occupant and the front of the head and abdomen and restrains the head, chest, abdomen, and pelvis around the shoulder of the occupant to protect the occupant safely. Do it.

To this end, the airbag cushion 20 is formed in a shawl shape surrounding both shoulders of the occupant, and inflates in front, upwards and downwards of the occupant so as to correspond to the occupant's head, chest, abdomen and pelvis around the occupant's shoulder. Can be deployed.

In detail, the airbag cushion 20 is installed on the backrest 12 of the seat 11 on which the occupant is seated, and the first and second cushions expanded and deployed in front, upward and downward from both sides of the backrest 12 (30, 40) and a third cushion (60) that is connected to any one of the first and second cushions (30, 40) and expands and deploys to the front of the occupant's head and neck.

The upper ends of the first and second cushions 30 and 40 may be connected by a connection part 50 disposed at the rear of the headrest 13 installed at the upper end of the backrest 12.

As described above, according to the present invention, since the connecting portion is disposed on the rear side of the headrest to form the airbag cushion in a shawl type, the strength of the airbag cushion can be improved by using the supporting force of the headrest.

As seen in FIGS. 1 and 2, the first cushion 30 may expand and expand toward the right side and front portions of the head, chest, and abdomen of the occupant while surrounding the right shoulder of the occupant.

The second cushion 40 may expand and expand toward the left and front portions of the occupant's head, chest, and abdomen while restraining and wrapping the occupant's left shoulder.

That is, the first and second cushions 30 and 40 are expanded and deployed from the top of the backrest 12 to the front, respectively, restraining both shoulders of the occupant, and from the head of the occupant to both sides of the chest, abdomen, and pelvis. It expands to the front and can protect the entire upper body of the occupant.

To this end, the first and second cushions 30 and 40 may be expanded and expanded inclined toward the front center of the occupant at both side ends of the backrest 12.

Accordingly, according to the present invention, the curtain airbag function, the far side and near side airbags, and the front airbag functions can be simultaneously obtained by expanding and deploying the airbag cushion.

The first and second cushions 30 and 40 may have a bag shape defining an inflatable space therein by a lower wall, a front wall, and a rear wall, respectively.

And the first and second cushions (30, 40), as shown in Figure 2, respectively, the inner panel (31, 41) in contact with the occupant and the outer panel (32, 42) facing the outside of the occupant sewing or one-piece woven It is formed in a bag shape by a method, and may have a plurality of protection areas to correspond to a body part in contact with the occupant.

For example, the first cushion 30 and the second cushion 40 are upper protection areas A1 and A3 that protect the head and shoulders and the upper chest of the occupant, respectively, as shown in FIGS. 1 and 3 It may have lower protection areas A2 and A4 that protect the lower chest of the passenger and the abdomen and pelvis.

In addition, the upper and lower protective regions A1 and A2 of the first cushion 30 may each include a plurality of chambers defined by one or more chamber walls.

Similarly, the upper and lower protection regions A3 and A4 of the second cushion 40 may include a plurality of chambers defined by one or more chamber walls.

Each of the first and second chamber walls 35 and 45 may be formed in a substantially'C' shape opened toward the front.

Of course, the present invention is not necessarily limited thereto, and the number, shape, and size of the chamber walls and chambers formed on the first and second cushions 30 and 40 can be variously changed.

In this way, the present invention effectively restrains the occupant's head, upper body, and lower body by expanding and deploying the first and second cushions in the event of a side collision and an inclined collision of a vehicle, thereby protecting the occupant safely, and in particular minimizing the occupant's brain injury. I can.

Meanwhile, the first and second cushions 30 and 40 may have various lengths extending downward so as to protect not only the abdomen and the pelvis of the occupant, but also the buttocks and thighs of the occupant, respectively.

At least one chamber wall may be formed on the connection part 50 to limit the connection part 50 to a plurality of chambers.

For example, the chamber wall is formed along a horizontal direction so as to limit the connection part 50 to two chambers that expand and expand vertically, or the connection part 50 and the first and second cushions 30 and 40 Each of the portions connected to each other may be formed in one or more pairs along the vertical direction.

The first cushion 30, the connection part 50, and the second cushion 40 may be expanded and expanded to be bent in an approximately'∩' shape when viewed from the front by each chamber wall when a vehicle collides.

Therefore, the connection part 50 can effectively reduce the occupant's brain injury value by constraining the occupant's head from moving outside the headrest during an inclined collision of the vehicle and absorbing the impact caused by the collision.

The connection part 50 may be provided with an introduction part 51 into which gas is introduced from the inflator 21 as shown in FIG. 4.

That is, the introduction part 51 is connected to the inflator 21, and the gas supplied from the inflator 21 in the event of a collision of the vehicle is transmitted to the first cushion 30 and the second cushion 40 through the connection part 50. .

Therefore, when the vehicle collides, the connection part 50 and the first and second cushions 30 and 40 are rapidly expanded and deployed, and the third cushion 60 receives gas through the second cushion 40 and continuously expands. Unfolds.

The inflator 21 may have a preset standard, such as a gas generation amount and a supply speed, according to collision characteristics in each direction such as a far side, a near side, and a front side of the occupant.

In FIG. 4, the introduction part 51 is shown to be provided on both upper ends of the connection part 50, but the present invention is not necessarily limited thereto, and one or more introduction parts 51 are provided at different positions, and one or more inflators ( 21) may be applied to effectively supply gas to the airbag cushion 20.

Next, the configuration of the third cushion will be described in detail with reference to FIGS. 1 to 4.

The third cushion 60 is directed toward the front of the occupant's head and neck at the front end of any one of the first and second cushions 30 and 40, for example, the second cushion 20 that expands and deploys on the left side of the occupant. Expand and unfold.

In this embodiment, as the configuration of the airbag device applied to the driver's seat is described, the third cushion 60 is described as being connected to the second cushion 40, but the present invention is not necessarily limited thereto, and the front passenger seat or rear row It should be noted that when applied to the seat provided on the right side of, it may be changed to connect the third cushion 60 to the first cushion 30.

When the occupant rotates the backrest 12 rearward and a frontal collision of the vehicle occurs in a recline state, the occupant's head and neck are enclosed and restrained by the third cushion 60 that expands and deploys in the front. .

As described above, the present invention expands and deploys a third cushion on the front of the occupant's head and neck in the event of a collision, thereby restraining the occupant's head and neck, and thus, a vehicle such as a steering wheel, a dashboard, and a windshield when the occupant moves forward. Injuries to occupants caused by collisions with my equipment can be prevented in advance.

In detail, the third cushion 60 may be provided in a bag shape having a substantially rectangular cross section so as to correspond to the front surface of the occupant's head and neck.

Of course, the shape, size, and thickness of the third cushion 60 may be variously changed when deployed according to various conditions, such as the shape and area of the occupant's head and neck, and the impact force generated when the vehicle collides.

Like the first and second cushions 30 and 40, the third cushion 60 is a sewing or one-piece woven method of the inner panel 61 in contact with the occupant and the outer panel 62 facing the outside of the occupant, that is, facing the front. It can be formed in a bag shape by.

In addition, at least one or more third chamber walls 63 that limit the third cushion 60 to a plurality of chambers may be formed on the third cushion 60.

For example, the third chamber wall 63 is formed extending downward and upward from the upper and lower ends of the third cushion 60, respectively, as shown in FIG. It can be provided as a pair to be connected.

Here, each of the third chamber walls 63 may be formed to be inclined toward the upper left side or may be formed along the vertical direction as shown in FIG. 3.

The central portion of the third cushion 60 is a portion corresponding to the head of the occupant, particularly the face, and may be provided as a non-inflating area 64 to reduce the impact force applied to the occupant when the airbag cushion 20 is deployed.

As described above, the present invention expands and deploys the third cushion toward the front of the occupant's head and neck from one of the first and second cushions constraining both sides of the occupant to effectively restrain the occupant's head and neck. I can.

Accordingly, the present invention can prevent injuries of the occupant due to collision with in-vehicle equipment such as a steering wheel, a dashboard, and a windshield while the head and upper body of the occupant move forward when a vehicle crashes.

In addition, the present invention may prevent injuries to the occupant caused by colliding with the head or neck of the occupant while the article inside the vehicle is in flight when the vehicle collides.

On the other hand, the airbag device 10 of the vehicle according to the present invention is a tether unit 70 that defines the deployment shape of the third cushion 60 so that the third cushion 60 is inflated and deployed on the front of the occupant's head and neck. It may further include.

For example, FIGS. 5 to 7 are exemplary views of an airbag device of a vehicle according to another exemplary embodiment of the present invention.

As shown in FIG. 5, the tether unit 70 may be provided with a first tether 71 having both ends connected to the first cushion 30 and the third cushion 60, respectively.

The left side of the first tether 71 may be branched into two so as to be connected to the upper and lower ends of the third cushion 60, respectively.

Of course, the present invention is not necessarily limited thereto, and connecting both ends of one first tether to various positions of the first cushion and the third cushion, or branching one or both ends of the first tether into two or more 3 It may be connected to the cushion, or may be changed to apply a plurality of first tethers.

As shown in FIG. 6, the tether unit 70 may be provided with a second tether 72 having both ends connected to the third cushion 60 and the connection part 50, respectively.

Here, a front end of the second tether 72 may be connected to an upper end or a front end of the third cushion 60, and a rear end of the second tether 72 may be connected to an upper end of the connection unit 50.

Of course, the present invention is not necessarily limited thereto, and connects both ends of one second tether to various positions of the third cushion and the connection part, or branching one or both ends of the second tether into two or more to the third cushion and the connection part. It may be connected or changed to apply a plurality of second tethers.

As illustrated in FIG. 7, the tether unit 70 may be provided with a third tether 73 having both ends connected to the third cushion 60 and the seat 11 or the back 12, respectively.

Here, one end of the third cushion 60, for example, the left end is connected to the right end or the lower end of the third cushion 60, and the right end of the third tether 73 is the seat 11 or the backrest 12. It can be connected to the right end.

Of course, the present invention is not necessarily limited thereto, and one end of the third tether is connected to the third cushion and various positions of the seat or back, or one end or both ends of the third tether are branched into two or more to provide the third cushion and It may be changed to connect the seat or the back, or to apply a plurality of third tethers.

Further, the tether unit 70 may be provided with an internal tether installed inside the airbag cushion 20 instead of being installed outside the airbag cushion 20.

Meanwhile, in the above embodiments, it has been described that the third cushion 60 is connected to the front end of the second cushion 40 to expand and deploy on the front of the occupant's head and neck, but the present invention is not limited thereto.

For example, FIGS. 8 to 11 are exemplary views of an airbag apparatus for a vehicle according to another exemplary embodiment of the present invention.

FIG. 8 shows a state in which the third cushion is expanded so that the front end of the third cushion 60, that is, the right end when viewed in FIG. 8 can contact the first cushion 30.

That is, in the present invention, by expanding the deployment volume and size of the third cushion 60 to contact the third cushion 60 and the first cushion 30, the head and neck of the occupant may be completely wrapped.

In addition, a coupling means 80 for temporarily coupling the third cushion 60 and the first cushion 30 may be installed on the third cushion 60 and the first cushion 30.

The coupling means 80 may include first and second Velcros respectively installed at positions corresponding to the ends of the third cushion 60 and the first cushion 30.

One of the first and second Velcro may be provided with male Velcro, and the other may be provided with female Velcro.

Of course, the present invention may be modified to apply a pair of magnets instead of Velcro as the coupling means, or to apply one magnet and a plate made of a metal material attachable to the magnet.

In addition, the present invention may be modified to apply a pair of friction materials made of various materials such as a synthetic resin material such as vinyl or a fabric with irregularities on the surface so as to instantly bond the third cushion and the first cushion using friction.

In addition, the present invention can be changed to install a plurality of pairs of first and second Velcro, respectively, on the first and third cushions.

9 and 10 illustrate a state in which a pair of third cushions 60 connected to the first and second cushions 30 and 40 are expanded and deployed, respectively.

In the present invention, as shown in FIG. 9, the third cushion 60 is provided at the front ends of the first and second cushions 30 and 40, respectively, and the deployment volume and size of each third cushion 60 are By adjusting and expanding and deploying to contact each other in front of the occupant, it is possible to completely wrap the occupant's head and neck.

Of course, a pair of third cushions 60 may be provided with a coupling means 80 in contact with each other.

Alternatively, the present invention, as shown in Figure 10, by installing a pair of third cushion 60 at different heights on the first and second cushions, respectively, together with the head and neck of the occupant, the abdomen and the pelvis of the occupant By expanding and deploying the entire area, the occupant's head and neck, and the abdomen and pelvis may be entirely covered and protected.

Meanwhile, FIG. 11 shows a state in which the fourth cushion for protecting the abdomen and pelvis of the occupant is expanded and deployed separately from the third cushion.

The present invention may further include a fourth cushion 90 that protects the abdomen and pelvis of the occupant in one or more of the first cushion 30 and the second cushion 40 as shown in FIG. 11. .

Here, the fourth cushion 90 may be provided to have the same size and volume as the third cushion 60, or may be provided to be expanded and deployed in a larger size and volume than the third cushion 60.

Accordingly, in the present invention, the third cushion and the fourth cushion may be expanded and expanded when a vehicle crashes to protect the occupant's head and neck as well as the abdomen and pelvis as a whole.

As described above, according to the present invention, the shape and size of the third cushion may be adjusted, or the third cushion may be provided as a pair so as to expand and deploy on both sides of the occupant, thereby wrapping and restraining the occupant's head and neck.

In addition, in the present invention, a pair of third cushions may be installed at different heights, or a fourth cushion may be provided under the third cushion to wrap and restrain the occupant's abdomen and pelvis together with the occupant's head and neck. have.

Accordingly, the present invention can minimize the injuries to the head and neck of the occupant by restraining the head and neck of the occupant as well as the abdomen and pelvis of the occupant when a vehicle crashes.

Although the invention made by the present inventor has been described in detail according to the above embodiment, the invention is not limited to the above embodiment, and it goes without saying that the invention can be changed in various ways without departing from the gist.

The present invention expands and deploys a shawl-shaped airbag cushion installed on the backrest of a seat when a vehicle crashes, restraining both sides and front of the occupant, and the head and neck of the occupant around the shoulders of the occupant to protect the occupant safely Applies to technology.

10: car airbag device
11: seat 12: backrest
13: headrest 14: seat frame
15: seat belt 16: center pillar
17: buckle 18: near side airbag
20: airbag cushion 21: inflator
30: first cushion 31, 32: inner, outer panels
40: second cushion 41, 42: inner and outer panels
50: connection part 51: introduction part
60: third cushion 61, 62: inner and outer panels
63: third chamber wall 64: non-expandable region
70: tether units 71 to 73: first to third tethers
80: coupling means 90: fourth cushion

Claims (7)

An airbag cushion that is formed in a shawl shape to restrain the entire upper body around both shoulders of the occupant in the event of a collision of a vehicle, and is deployed toward both sides of the occupant and the front of the head and neck.
It includes an inflator that generates gas by an impact detection signal when a vehicle crashes and supplies it to the airbag cushion,
The airbag cushion is installed on the back of the seat on which the occupant is seated,
First and second cushions that expand and expand forward and upward and downward from both sides of the backrest
And a third cushion connected to any one of the first and second cushions and expanded and deployed in front of the head and neck of the occupant. The method of claim 1,
The third cushion is formed to be in contact with an unconnected cushion among the first and second cushions upon expansion and deployment,
The third cushion and the unconnected cushion are provided with coupling means for temporarily coupling at positions corresponding to each other,
The airbag device of a vehicle, characterized in that the upper ends of the first and second cushions are connected by a connection part. The method of claim 1,
Further comprising a tether unit for defining the deployment shape of the third cushion,
One end of the tether unit is connected to the third cushion,
The other end of the tether unit is an airbag device of a vehicle, characterized in that connected to the unconnected cushion or connection, seat or backrest. The method of claim 1,
The third cushion is connected to the first and second cushions, respectively, and is provided in a pair that expands and expands to the front of the head and neck of the occupant,
The airbag device of a vehicle, characterized in that the upper ends of the first and second cushions are connected by a connection part. The method of claim 4,
The pair of third cushions are formed in a size and shape that can contact each other in front of the occupant,
The airbag device of a vehicle, characterized in that a coupling means for temporarily maintaining a coupled state is installed at a portion in contact with each other on the pair of third cushions. The method of claim 4,
The airbag device of a vehicle, wherein the pair of third cushions are installed at different heights so as to expand and deploy in front of the occupant's head and neck, and the occupant's abdomen and pelvis, respectively. The method of claim 1,
The airbag cushion further comprises a fourth cushion connected to any one of the first and second cushions and inflated and deployed in front of an abdomen and a pelvis of a passenger.

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