KR102167448B1 - Airbag apparatus of vehicle - Google Patents

Abstract

The present invention relates to an airbag device of a vehicle, including: an airbag cushion that is formed in a shawl shape to cover and restrain the entire upper body, abdomen, and pelvis around passenger′s shoulders in case of a car crash, and is deployed toward both sides of a passenger; and a deployment area control unit that increase a deployment area for restraining the abdomen and pelvis of the passenger by moving the lower ends of both sides of first and second cushions of the airbag cushion deployed on both sides of the passenger toward the front, and improves support power. Accordingly, the upper body, abdomen and pelvis of the passenger are effectively restrained using the shawl type airbag cushion, so that the passenger can be safely protected.

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.

In addition, when a car crashes while the occupant rotates the seat about 90°, the pelvis of the occupant must be firmly supported in order to safely protect the upper and lower bodies of the occupant.

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.

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 airbags on both sides and front of the occupant when a vehicle crashes.

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.

Another object of the present invention is to provide an airbag device for a vehicle capable of effectively supporting and protecting a passenger's pelvis area together with an upper body of an occupant.

In order to achieve the above object, the airbag device of the vehicle according to the present invention is formed in a shawl shape so as to wrap and restrain the entire upper body, the abdomen and the pelvis around the shoulders of both sides of the occupant during a collision of the vehicle. The airbag cushion deployed toward the side and the lower ends of both the first and second cushions of the airbag cushion deployed on both sides of the occupant are moved forward to increase the deployment area that restrains the abdomen and pelvis of the occupant, and improves support. It characterized in that it comprises a deployment area control unit.

As described above, according to the airbag device of the vehicle according to the present invention, by pulling the lower end portions of the first and second cushions deployed on both sides of the occupant toward the front and the center of the seat by using the deployment area adjustment unit, The effect of increasing the deployment area of the airbag cushion protecting the pelvic region is obtained.

Further, according to the present invention, an effect of improving the lateral support for restraining the abdomen and pelvis of the occupant can be obtained by pulling the lower ends of the first and second cushions by the deployment area adjusting unit.

In addition, according to the present invention, by bending a pair of guide unit front ends toward the center of the seat, the tether connected to the lower ends of the first and second cushions is moved toward the front and the center of the seat, The effect of being able to further increase the lateral bearing capacity of is obtained.

In addition, according to the present invention, the effect of restraining the pelvis of the occupant is obtained by moving the lower end portions of the first and second cushions forward using the driving device or the deployment pressure of the airbag cushion.

In addition, according to the present invention, at the initial stage of deployment of the airbag cushion, the lower part of the airbag cushion is pulled forward to restrain the occupant's pelvic area and thigh area, and move it back to the rear to effectively restrain the occupant's pelvic area. Lose.

Accordingly, according to the present invention, by effectively restraining the upper body of the occupant, the abdomen and the pelvis, together with the upper body of the occupant by using a shawl-type airbag cushion, an effect that the occupant can be safely protected is obtained.

1 is a perspective view of an airbag device of a vehicle according to a first embodiment of the present invention,
2 is a front view of the airbag device of the vehicle shown in FIG. 1,
3 is an exploded view of the airbag cushion,
4 is a plan view of a sheet in which an expansion area control unit is installed;
5 is a side view showing a state in which the tether shown in FIG. 4 is moved;
6 and 7 are a bottom view and a side view of a seat to which an airbag device of a vehicle according to a second embodiment of the present invention is applied;
8 is a bottom view of a seat to which an airbag device of a vehicle according to a third embodiment of the present invention is applied;
9 and 10 are a bottom view and a side view of a seat to which an airbag device of a vehicle according to a fifth embodiment of the present invention is applied.

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 can effectively restrain the pelvis of the occupant by attaching a movable tether connecting the lower ends of both sides of the airbag cushion together with the upper body of the occupant when a vehicle crashes.

Hereinafter, the configuration of an airbag device installed in the driver's seat of a general vehicle will be 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 referred to as'rear (B)'. do. 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.

[First embodiment]

1 is a perspective view of an airbag device of a vehicle according to a first embodiment of the present invention, FIG. 2 is a front view of the airbag device of a vehicle shown in FIG. 1, and FIG. 3 is an exploded view of the airbag cushion.

The airbag device 10 of a vehicle according to the first embodiment of the present invention, as shown in FIGS. 1 to 3, wraps and restrains the entire upper body around both shoulders of the occupant during a collision of the vehicle. It includes an airbag cushion 20 formed in a shape and deployed toward both sides of the occupant, and an inflator 21 that generates gas by an impact detection signal when a vehicle crashes and supplies it to the airbag cushion 20.

The airbag cushion 20 is inflated and deployed on both sides and front of the occupant and functions to protect the occupant safely by restraining the head, chest, abdomen, and pelvis around the occupant's shoulder.

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 it is installed to be disposed on the rear of the headrest 13 on the upper end of the backrest 12, and includes a connecting portion 50 connecting the upper ends of the first and second cushions.

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, as shown in FIG. 1, the first cushion 30 and the second cushion 40 are respectively provided with upper protection areas A1 and A3 that protect the passenger's head and shoulders and the upper chest. It may have lower protection areas A2 and A4 that protect the lower chest, 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.

For example, each of the first and second chamber walls may be formed in an approximately'C' shape opened toward the front or the rear.

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. .

Accordingly, when a vehicle crashes, the first and second cushions 30 and 40 are continuously expanded and deployed by receiving gas through the connection part 50.

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. 3, the introduction part 51 is shown to be provided on both sides of the upper end 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 at least one inflator ( 21) may be applied to effectively supply gas to the airbag cushion 20.

Meanwhile, in the airbag device 10 of a vehicle configured as described above, the seat 11 may be rotated about 90° to the left or right in order for the occupant to have a meeting or conversation with another occupant.

In this way, when a collision accident of a vehicle occurs while the seat 11 is rotated or a side collision accident occurs, the first and second cushions 30 and 40 may open to both sides.

In particular, when the lower ends of the first and second cushions 30 and 40 are wide open to both sides or cannot be completely expanded to the pelvis of the occupant, it is difficult to effectively restrain the abdomen and the pelvis of the occupant.

Therefore, the present invention is developed to increase the deployment area for restraining the abdomen and pelvis of the occupant by moving the lower ends of the first and second cushions 30 and 40 toward the front and the center of the seat 11, and to improve the support. It includes an area adjustment unit 60.

For example, FIG. 4 is a plan view of a sheet in which an expansion area control unit is installed, and FIG. 5 is a side view showing a state in which the tether shown in FIG. 4 is moved.

In this embodiment, as shown in Figs. 4 and 5, the deployment area adjustment unit 60 is a pair defining the deployment shape of the lower ends of the first and second cushions 30 and 40 on both sides of the seat 11 The tether 61 and the lower end of the first and second cushions 30 and 40 of the passenger pull the pair of tethers 61 to restrain the pelvic area of the occupant, and a driving module 62 that generates a driving force to move it forward. Include.

One end of the pair of tethers 61, as seen in FIG. 5, the upper end of each tether 61 is connected to the lower end of the first and second cushions 30 and 40, and the other end of the pair of tethers 61, For example, the lower end of each tether 61 may be connected to the driving module 62, respectively.

Thus, the pair of tethers 61 can move to the front of the seat 11 while cutting the cut line (not shown) formed on the upper surface of the cover of the seat 11 when the vehicle crashes.

Each tether 61 may be formed in a linear shape, but may be formed in a strip shape having a predetermined width and thickness so as to have a certain rigidity to prevent damage or damage when the airbag cushion 20 is deployed.

On the other hand, a pair of tethers 61 are packed together with the airbag cushion 20 on the backrest 12 bolster of the seat 11 while the airbag cushion 20 is rolled or folded. Can be.

The driving module 62 may include a driving device 63 that generates a driving force and a moving unit 64 that moves the pair of tethers 61 forward by using the driving force transmitted from the driving device 63. .

In addition, the driving module 62 further includes a guide unit 68 for guiding the movement of the moving unit 64 so as to move the pair of tethers 61 forward when the airbag cushion 20 is deployed. I can.

For example, the driving device 63 may be provided with a pair of driving motors, as shown in FIG. 4.

A pair of driving motors may be installed on both sides of the front end of the seat 11, and the guide unit 68 may be installed in a pair extending from both rear ends of the seat 11 toward the front.

The guide unit 68 may apply a unit of various shapes and structures, such as a rail or a linear motion guide.

The moving unit 64 is connected to the output shaft of each drive motor, and a pair of pinions 65 rotating by the driving force generated from the driving motor and a pair of racks 66 which linearly reciprocate by the rotation of each pinion 65. ) Can be included.

A pair of racks 66 may be installed to be movable in the front and rear directions on a rail provided as a guide unit 68.

The rack 66 is connected to one end, for example, the lower end of the tether 61, and the tether 61 moves forward when the rack 66 moves forward, while the other ends of the tether 61, that is, the first and the first connected to the upper end. 2 Pull the lower ends of the cushions 30 and 40 forward.

Accordingly, the lower ends of the first and second cushions 30 and 40 are pulled forward while being deployed on both sides of the occupant's abdomen and pelvis, respectively.

As described above, the present invention can increase the deployment area of the airbag cushion that protects the abdomen and pelvis of the occupant by pulling the lower ends of the first and second cushions deployed on both sides of the occupant toward the front by using the deployment area adjusting unit. have.

In addition, the present invention can improve the support for restraining the abdomen and pelvis of the occupant by pulling the lower ends of the first and second cushions by the deployment area adjusting unit.

Accordingly, in the present invention, by effectively restraining the upper body of the occupant, the abdomen and the pelvis, together with the upper body of the occupant using a shawl-type airbag cushion, the occupant can be safely protected.

Meanwhile, in the present embodiment, it has been described that the rack 66 and the pinion 65 are applied to the driving module 62 of the deployment area control unit 60, but the present invention is not limited thereto.

[Second Embodiment]

6 and 7 are a bottom view and a side view of a seat to which an airbag device of a vehicle according to a second embodiment of the present invention is applied.

In the airbag device 10 of a vehicle according to the second embodiment of the present invention, instead of the rack 66 and the pinion 65, the lower end of the tether 61 is connected as shown in FIGS. A connection tether 69 connecting the 67) and the driving device 63 may be applied, and the connection tether 69 may be wound using the rotational force of the driving device 63 to move the tether 61 forward.

That is, when a pair of driving motors are applied to the driving device 63, one end of the connection tether 69 and the front end of the connection tether 69 as seen in FIG. 6 are connected to a pulley installed on the output shaft of the driving motor, The rear end of the connection tether 69 may be connected to the moving member 67.

Therefore, when the airbag cushion 20 is deployed, the connecting tether 69 is wound around the pulley by the rotational force generated from the driving motor, and the moving member 67 and the tether 61 move forward.

Meanwhile, the driving device 63 may be changed to apply not only a driving motor, but also a retractor or a pretensioner applied to a general seat belt.

When the retractor or pretensioner is applied, the connection tether 69 moves forward by a force generated by the retractor or pretensioner, for example, a force that pulls forward, and thereby the moving member 67 and the tether 61 Moves forward.

[Third Embodiment]

8 is a bottom view of a seat to which an airbag device of a vehicle according to a third embodiment of the present invention is applied.

In the third embodiment of the present invention, a pair of guide units 68 applied to the expansion area adjustment unit 60 are installed along the front and rear directions on both sides of the sheet 11, as shown in FIG. The front end of the guide unit 68 may be formed to be bent toward the center of the sheet 11.

Therefore, the moving member 67 connected to the lower end of the tether 61 moves forward along each guide unit 68 and toward the center of the seat 11.

In this way, the present invention moves the tether connected to the lower ends of the first and second cushions toward the front and the center of the seat by bending the front end portions of the pair of guide units toward the center of the seat. Lateral bearing capacity can be further increased.

Meanwhile, in the above embodiments, it has been described that the pair of tethers 61 are moved forward using a driving force generated by a driving device installed at the front end of the sheet 11, but the present invention is not limited thereto.

[Fourth embodiment]

Instead of using the driving force of the drive module 62, the airbag device 10 of the vehicle according to the fourth embodiment of the present invention uses the deployment pressure of the airbag cushion 20 to provide the moving member 67 and a pair of tethers. (61) can be moved forward.

That is, in the present embodiment, the deployment area adjusting unit 60 may remove the driving device 63 of the driving module 62 and include only the moving member 67 and the guide unit 68.

Therefore, the moving member 67 is connected to the lower ends of the first and second cushions 30 and 40 through a pair of tethers 61, respectively, and is not affected by the deployment pressure of the airbag cushion 20 when the airbag cushion 20 is deployed. As a result, it moves forward along the guide unit 68.

As described above, the present invention removes the driving device and moves the pair of moving members forward using the deployment pressure of the airbag cushion to constrain the lower end of the first and second cushions to the pelvis of the occupant, and the side of the airbag cushion Directional bearing capacity can be increased.

[Fifth Embodiment]

9 and 10 are a bottom view and a side view of a seat to which an airbag device of a vehicle according to a fifth embodiment of the present invention is applied.

In the airbag device 10 of a vehicle according to the fifth embodiment of the present invention, a driving device 63 is disposed at the front end and the rear end of the seat 11, respectively, so that both lower ends of the airbag cushion 20 are moved forward. Then, it is moved back to the rear and placed in the center of the sheet 11.

That is, in this embodiment, the driving device 63 is a pair of first driving devices 631 installed on both sides of the front end of the seat 11 and both sides of the rear end of the seat 11, as shown in FIG. 9. It may include a pair of second driving devices 632 installed in the.

In addition, a first connecting tether 691 connecting the first driving device 631 and the moving member 67 is connected to the front end of the moving member 67, and a second driving device 632 is connected to the rear end of the moving member 67. ) And the second connection tether 692 connecting the moving member 67 may be connected.

Thus, the moving member 67 moves forward by the driving force of the first driving device 631 at the initial stage of deployment of the airbag cushion 20.

Accordingly, the first and second cushions 30 and 40 of the airbag cushion 20 are deployed on both sides of the passenger's thigh area as well as the passenger's pelvis at the initial stage of deployment to securely protect the thigh and the pelvis by restraining the thigh and the pelvis together. I can.

Subsequently, the second driving device 632 is driven when a preset time elapses after the airbag cushion 20 starts to be deployed to generate a driving force to move the moving member 67 backward. Then, the moving member 67 moves backward by the driving force of the second driving device 632.

At this time, the first driving device 631 rotates in the reverse direction by a preset angle so that the moving member 67 can move backward.

Thus, the moving member 67 may be disposed at a point where the driving force generated by the first and second driving devices 631 and 632 is balanced, for example, in the center of the seat 11.

Accordingly, a pair of tethers 61 connected to the first and second cushions 30 and 40 are disposed at the lower end of each of the centers of the seat 11, and the first and second cushions 30 and 40 are occupants It is deployed on both sides of the pelvis of the passenger and continuously restrains the pelvis of the occupant.

As described above, the present invention arranges driving devices at the front and rear ends of the seat, so that the moving member and the tether are moved forward at the initial stage of deployment of the airbag cushion to restrain the pelvis and thighs of the occupant, and again, the moving member and the tether By moving the rearward and disposing it in the center of the seat, it is possible to restrain the pelvis of the occupant and improve the lateral support of the lower end of the airbag cushion.

On the other hand, the present invention may be changed to arrange the driving device 63 only at the rear of the seat 11.

That is, in the present invention, as described in the fourth embodiment, in the initial stage of deployment of the airbag cushion 20, the pair of moving members 67 and the tether 61 are moved using the deployment pressure of the airbag cushion 20. It moves forward and restrains the passenger's thigh and pelvis.

In addition, the present invention drives the driving device 63 installed at the rear of the seat 11 when a preset time elapses, and moves the pair of moving members 67 and the tether 61 to the rear, so that the central portion of the seat 11 By arranging it, it is possible to constrain the pelvis of the occupant and improve the lateral support force of the lower end of the airbag cushion.

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 is applied to the technology of an airbag device of a vehicle that securely protects the occupant by restraining the upper body and the pelvis of the occupant around both shoulders of the occupant by expanding and deploying the shawl-shaped airbag cushion installed on the backrest of the seat during a collision of a vehicle. .

10: car airbag device
11: seat 12: backrest
13: headrest
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: deployment area control unit 61: tether
62: drive module 63: drive device
631,632: first and second drive devices 64: mobile unit
65: pinion 66: rack
67: moving member 68: guide unit
69: connection tether 691,692: first, second connection tether

Claims (11)

An airbag cushion formed in a shawl shape and deployed toward both sides of the occupant so as to wrap and restrain the entire upper body, abdomen, and pelvis around both shoulders of the occupant when a vehicle crashes.
The first and second cushions of the airbag cushion deployed on both sides of the occupant are moved forward so as to increase the deployment area for restraining the abdomen and the pelvis of the occupant, and include a deployment area adjustment unit for improving support, and ,
The deployment area control unit includes a pair of tethers installed on both sides of the seat and connected to lower ends of the first and second cushions, respectively, to define the deployment shape of the airbag cushion,
The pair of tethers move to the front of the seat while cutting the incision line formed on the seat so that the lower ends of the first and second cushions restrain the pelvis of the occupant when the airbag cushion is deployed. Airbag device. The method of claim 1,
The deployment area control unit further includes a moving unit that moves forward by the deployment pressure of the airbag cushion when the airbag cushion is deployed,
When the airbag cushion is deployed, the pair of tethers move to the front of the seat by the movement of the moving unit. The method of claim 2, wherein the mobile unit
A moving member connected to the lower end of the pair of tethers and linearly moving forward by the deployment pressure of the airbag cushion; and
And a guide unit for guiding the linear movement of the moving member. The method of claim 1,
The deployment area control unit further includes a driving module for generating a driving force to move the pair of tethers forward so that lower ends of the first and second cushions restrain the pelvis of the occupant when the airbag cushion is deployed,
The airbag device of a vehicle, wherein the pair of tethers moves to the front of the seat by the driving force generated by the driving module. The method of claim 4,
The driving module includes a driving device generating a driving force and
It includes a moving unit for moving the pair of tethers forward using the driving force transmitted from the driving device,
The moving unit is connected to the output shaft of the driving device and rotates by a driving force generated from the driving device, and
A rack linearly moving forward by rotation of the pinion,
A moving member connected to the lower end of the pair of tethers and linearly moving forward by a driving force transmitted from the driving device; and
And a guide unit for guiding the linear movement of the moving member. The method of claim 4,
The driving module includes a driving device generating a driving force and
It includes a moving unit for moving the pair of tethers forward using the driving force transmitted from the driving device,
The moving unit is a moving member connected to the lower end of the pair of tethers and linearly moving forward by a driving force transmitted from the driving device,
A connection tether having a rear end connected to the moving member and wound around a pulley installed on the output shaft of the driving device by rotation of the driving device; and
And a guide unit for guiding the linear movement of the moving member. The method of claim 1,
The deployment area control unit is driven to generate a driving force to move the pair of tethers forward and then to the rear so that the lower ends of the first and second cushions restrain the pelvis of the occupant when the airbag cushion is deployed. Including more modules,
The airbag device of a vehicle, wherein the pair of tethers move to the front and rear of the seat by the driving module when the airbag cushion is deployed. The method of claim 7,
The driving module includes first and second driving devices for generating driving force to move the pair of tethers forward and backward, and
And a moving unit for moving the pair of tethers forward and backward using a driving force transmitted from the first and second driving devices, respectively,
The moving unit is a moving member connected to the lower end of the pair of tethers and linearly moving forward by a driving force transmitted from the driving device,
A connection tether having a rear end connected to the moving member and wound around a pulley installed on the output shaft of the driving device by rotation of the driving device; and
And a guide unit for guiding the linear movement of the moving member. The method of claim 1,
When the airbag cushion is deployed, the deployment area control unit moves forward by the deployment pressure of the airbag cushion, and
Further comprising a driving module for generating a driving force for moving the pair of tethers moved forward to the rear,
The pair of tethers are moved to the front of the seat by the movement of the moving unit, and then move to the rear of the seat by the driving force of the driving module to be disposed in the center of the seat. The method of claim 9,
The driving module includes a driving device for generating a driving force to move the pair of tethers,
The moving unit is a moving member connected to the lower end of the pair of tethers and linearly moving forward by a driving force transmitted from the driving device,
A connection tether having a rear end connected to the moving member and wound around a pulley installed on the output shaft of the driving device by rotation of the driving device; and
And a guide unit for guiding the linear movement of the moving member. The method according to any one of claims 3, 5, 6, 8 and 10,
The guide unit is installed along the front and rear directions on both sides of the sheet,
The airbag device of a vehicle, wherein the front end portion of the guide unit is bent toward the center of the seat so as to increase the supporting force acting on the lower end portions of the airbag cushion.

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