WO2022255510A1

WO2022255510A1 - Vehicular airbag device

Info

Publication number: WO2022255510A1
Application number: PCT/KR2021/006837
Authority: WO
Inventors: 권태익; 장규성; 이승진; 정대창
Original assignee: 아우토리브 디벨롭먼트 아베
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-12-08

Abstract

The present invention relates to a vehicular airbag device comprising: an airbag cushion which inflates and deploys in the form of a shawl toward both sides of a passenger so as to surround and restrain the entire upper body of the passenger around both shoulders in the event of a collision of a vehicle; and an inflator which generates gas by means of an impact detection signal in the event of a collision of the vehicle, and supplies the gas to the airbag cushion. The central portion of the airbag cushion is entirely or partially cut such that the airbag cushion is formed divided. Accordingly, in the event of a collision of the vehicle, the airbag cushion inflates and deploys in an optimal shape toward both sides and the front of the passenger while avoiding interference with the headrest, and thus the passenger can be safely protected.

Description

car airbag device

The present invention relates to an airbag device for a vehicle, and more particularly, to an airbag device for a vehicle that inflates and deploys upon collision of a vehicle to restrain and protect an occupant.

In general, an automobile airbag device is a safety device that protects occupants 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 in a steering wheel, dashboard, seat, sidewall, etc. provided in a vehicle, and inflates toward the front or side of the occupant when the vehicle collides to protect the occupant.

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

On the other hand, recently, self-driving cars that move by themselves even without a driver driving the vehicle are being developed.

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

The high-tech sensor measures the distance between objects like a person, detects danger, and helps to see all areas without blind spots. Also, the graphic processing unit recognizes the surrounding environment of the vehicle through a plurality of cameras and analyzes the images to help the vehicle drive safely.

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

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

The occupant can adjust the angle of the backrest in various ways, and rotate the seat to meet with the occupants in the back seat.

Therefore, it is impossible to apply a general airbag device designed based on a seated posture of an occupant facing forward on a seat to an autonomous vehicle.

Accordingly, the applicant of the present invention discloses and applies for a patent for a configuration of an airbag device for a vehicle capable of safely protecting a passenger by inflating and deploying airbags on the front and both sides of a passenger in the event of a vehicle collision in Patent Document 1 below.

1 is a perspective view of an airbag device for a vehicle according to Patent Document 1, and FIG. 2 is an exploded view of an airbag cushion shown in FIG. 1 .

As shown in FIGS. 1 and 2 , the airbag cushion 20 applied to the airbag device 10 of a vehicle according to Patent Document 1 moves forward, upward, and downward from both upper ends of the backrest 12 of the seat 11. It includes first and

second cushions

30 and 40 that are inflated and deployed, and a connection portion 50 connecting the first and

second cushions

30 and 40.

The first and

second cushions

30 and 40 include upper protection areas A1 and A3 that protect the occupant's head, shoulders, and upper chest, and lower protection areas that protect the occupant's lower chest, abdomen, and pelvis, respectively. A2, A4).

As each of the upper protection areas A1 and A3 and the lower protection areas A2 and A4 protrude toward the front and rear with respect to the connecting portion 50, the airbag cushion 20 is formed in a substantially 'W' shape. .

That is, in Patent Document 1, in order to minimize interference with the headrest 13 when the airbag cushion 20 deploys, the front end to which the first and

second chambers

30 and 40 are connected is concave backward.

However, Patent Document 1 does not completely eliminate interference with the headrest 13 in the process of deploying the airbag cushion 20, so there is a limit to deploying the airbag cushion in an optimal shape for safely protecting the occupant.

In addition, the first and

second cushions

30 and 40 protrude toward the front and rear on both sides of the connection portion 50 so as to expand and deploy forward, upward, and downward from both sides of the occupant.

In this way, Patent Document 1 discloses that the airbag cushion 20 is lost in the process of cutting the fabric used in the manufacture of the airbag cushion 20 as both sides of the airbag cushion 20 protrude toward the front and rear on both sides around the central portion. part increased.

For this reason, Patent Document 1 has a problem in that the manufacturing cost increases due to an increase in the amount of loss of the fabric, and the cutting process is complicated and the workability decreases.

(Patent Document 1) Korean Patent Registration No. 10-2064844 (published on January 10, 2020)

An object of the present invention is to solve the above problems, and to provide an airbag device for a vehicle that can safely protect the occupant by inflating and deploying airbags on both sides and front of the occupant in the event of a vehicle collision.

Another object of the present invention is to provide an airbag device for a vehicle capable of safely protecting an occupant regardless of the direction and posture of the occupant in an autonomous vehicle.

Another object of the present invention is to provide an airbag device for a vehicle capable of inflating and deploying an airbag cushion in an optimal shape while avoiding interference with a hethrest during deployment.

Another object of the present invention is to provide an airbag device for a vehicle capable of reducing the amount of fabric loss and improving workability when manufacturing an airbag cushion.

In order to achieve the above object, the airbag device for a vehicle according to the present invention is an airbag cushion that inflates and deploys in a shawl shape toward both sides of the occupant so as to wrap and restrain the entire upper body centered on both shoulders of the occupant in the event of a vehicle collision and an inflator generating gas according to an impact detection signal when a vehicle crashes and supplying the gas to the airbag cushion, wherein the airbag cushion is completely or partially cut at the center to avoid interference with the headrest when inflating and deploying. characterized by being

As described above, according to the airbag device for a vehicle according to the present invention, the shawl-shaped airbag cushion installed on the backrest of the seat is inflated and deployed to restrain both sides and front of the occupant centered on both shoulders of the occupant, thereby reducing the occupant's The effect of being able to safely protect is obtained.

In addition, according to the present invention, it is possible to safely protect the occupant regardless of the direction and posture of the occupant in an autonomous vehicle.

In addition, according to the present invention, by forming a slit in the center of the airbag cushion and dividing it into both sides, an effect of inflating and deploying the airbag cushion in an optimal shape by avoiding interference with the hairrest during deployment is obtained.

In addition, according to the present invention, the airbag cushion is formed in a substantially rectangular or elliptical shape to minimize the loss of fabric during manufacturing of the airbag cushion, thereby reducing manufacturing cost and improving workability during manufacturing work due to easy cutting work. The effect that can be obtained is obtained.

1 is a perspective view of an airbag device for a vehicle according to the prior art;

2 is an exploded view of the airbag cushion shown in FIG. 1;

3 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a first embodiment of the present invention;

4 is an exemplary view showing a state in which a temporary fixing means is applied to the airbag cushion shown in FIG. 3;

5 is a cross-sectional view showing the configuration of a hang tag installed in a false fixing part;

6 to 8 are views each illustrating a modified example of the fixing means shown in FIG. 4;

9 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a second embodiment of the present invention;

10 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a third embodiment of the present invention;

11 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a fourth embodiment of the present invention;

12 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a fifth 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 inflates and deploys airbag cushions on both sides and front of the head and chest of the occupant centering on both shoulders of the occupant to restrain the occupant's entire upper body and safely protect the occupant.

In particular, according to the present invention, the airbag cushion is formed in a substantially rectangular or elliptical shape, and a slit is formed in the center of the airbag cushion to inflate and deploy toward both side surfaces and the front of the occupant upon a vehicle collision.

Accordingly, the present invention can reduce manufacturing cost by minimizing loss of fabric fabric during manufacturing of an airbag cushion, and improve workability during manufacturing work by facilitating cutting work.

In addition, in this embodiment, the configuration of the 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 referred to as 'rear (B)'. )'. In addition, terms indicating directions such as 'left (L)', 'right (R)', 'upper (U)' and 'downward (D)' indicate respective directions based on the forward and backward directions. defined as doing

Therefore, the front and rear (F, B) directions of the car can be expressed as a horizontal direction, and the top and bottom (U, D) directions of the car can be expressed as a vertical direction.

Embodiments of the present invention to be described below will be described by citing the configuration of an airbag device of a vehicle shown in FIG. 1, and will be mainly described with the configuration of an airbag cushion.

[First Embodiment]

3 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a first embodiment of the present invention.

As shown in FIGS. 1 and 3 , the airbag cushion applied to the airbag device of a vehicle according to the first embodiment of the present invention wraps and restrains the entire upper body of the occupant around both shoulders of the occupant when a car crashes. It includes an airbag cushion 20 that is inflated and deployed toward both sides in a shawl shape, 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 to restrain the head, chest, abdomen, and pelvis around the shoulder of the occupant to safely protect the occupant.

To this end, as shown in FIG. 3, the airbag cushion 20 is formed in a substantially square or oval shape, covers both shoulders of the occupant, and corresponds to the head, chest, abdomen, and pelvis of the occupant in front of the occupant. And it expands and unfolds in a shawl shape toward the upper and lower sides.

In detail, the airbag cushion 20 is installed on the backrest 12 of the seat 11 on which the occupant sits, and the first and second airbag cushions 20 inflate and deploy forwardly, upwardly and downwardly from upper ends of both sides of the backrest 12. A slit 22 may be formed at the center of a front end of the airbag cushion 20 including the

cushions

30 and 40 and where the first and

second cushions

30 and 40 come into contact with each other.

That is, the front ends of the first and

second cushions

30 and 40 may be cut from the front end to the rear end by a length corresponding to the slit 22 formed in a predetermined length and separated from each other. Further, the rear ends of the first and

second cushions

30 and 40 may be connected by the connection part 50 .

The connection part 50 may be disposed on the rear surface of the headrest 13 installed on the top of the backrest 12.

Therefore, according to the present invention, the airbag cushion is inflated and deployed in a shawl shape by arranging the connecting portion at the rear side of the headrest, thereby improving the strength of the airbag cushion by using the supporting force of the headrest.

For example, the slit 22 may be formed with a length corresponding to each of the upper protection chambers A1 and A3 of the first and

second cushions

30 and 40 to be described below.

Further, the slit 22 may be formed in a substantially 'T' shape as shown in FIG. 3 or in a substantially 'Y' shape with both ends of the rear end inclined toward the rear.

As described above, according to the present invention, as the airbag cushion is formed in a rectangular or oval shape, the difficulty of cutting the fabric for manufacturing the airbag cushion can be reduced and workability can be improved.

In addition, the present invention can increase the number of airbag cushions disposed on a fabric having a substantially rectangular shape, and reduce manufacturing costs by minimizing loss during cutting.

The airbag cushion 20 is formed in a bag shape by sewing or one-piece woven with an inner panel in contact with the occupant and an outer panel facing the occupant, and a plurality of protection areas corresponding to the body parts of the occupant. can have

Therefore, a wall is formed at the edge of the airbag cushion 20, and each wall and the chamber wall are selectively applied with at least one appropriate method among various bonding methods such as adhesive, RF welding, and ultrasonic welding, as well as a sewing method or a one-piece woven method. can be formed

For example, the first cushion 30 and the second cushion 40 protect the upper protection areas A1 and A3 that protect the occupant's head, shoulders, and upper chest, and the occupant's lower chest, abdomen, and pelvis. It may have lower protection areas A2 and A4 to protect.

The upper and lower protection areas A1 and A2 of the first cushion 30 and the upper and lower protection areas A3 and A4 of the second cushion 40 are respectively defined by one or

more chamber walls

31 and 41. It may include a plurality of chambers to be.

Of course, the connection unit 50 may also include chambers by one or more chamber walls (not shown), and the shape and position of each chamber wall, the number of chamber walls and chambers may be variously changed.

So, the first cushion 30, the connecting portion 50, and the second cushion 40 are bent and deployed in a substantially '∩' shape when viewed from the front by the

respective chamber walls

31 and 41 when a vehicle collides. can

Accordingly, the connecting portion 50 restrains the occupant's head from moving outside the headrest 13 in case of an inclined collision of the vehicle, and absorbs the shock caused by the collision, thereby effectively reducing the occupant's brain injury.

Inlet portions

32 and 42 through which gas is introduced from the inflator 21 may be provided on rear walls of the first and

second cushions

30 and 40 , respectively.

Each

inlet portion

32 and 42 is connected to each inflator 21 so that gas generated from the inflator can be introduced when a vehicle collides.

For example, the

inlet portions

32 and 42 may preferentially transfer the gas supplied from the inflator 21 to the rear chambers of the first and

second cushions

30 and 40 in case of a vehicle collision. 2 may be formed on the rear wall of the

cushions

30 and 40 inclined toward the front and upper sides.

The inflator 21 may have the same specifications, for example, gas generation amount, supply speed, etc., or two different specifications depending on the collision characteristics of the far side and near side of the occupant.

Of course, the present invention is not necessarily limited thereto, and may be modified to supply gas to the airbag cushion using one inflator or to supply gas to the airbag cushion using three or more inflators.

Also, the rear wall of the first and

second cushions

30 and 40 and the connecting portion 50 may be fixed inside the backrest 12 of the seat 11 by using a plurality of fixing members.

In the airbag cushion 20 configured as described above, a temporary fixing means 60 for temporarily connecting the first and

second cushions

30 and 40 by temporarily fixing the contact portion between the first and

second cushions

30 and 40 is provided. can be provided.

The airbag cushion 20 is installed in a frame (not shown) provided inside the backrest 12 of the seat 11 in a rolled state in a rolling or folding manner.

Therefore, since the first and

second cushions

30 and 40 are divided by the slit 22 in the process of rolling or folding the airbag cushion 20, the arrangement of the

cushions

30 and 40 is irregular. It is rolled or folded, and as a result, the unfolded shape of each

cushion

30 or 40 may be incomplete.

Therefore, the present invention provides a temporary fixing means to the slit portion of the airbag cushion, rolls or folds the airbag cushion in an aligned state, and separates the temporary fixing means to inflate the first and second cushions to desired shapes, respectively, when inflating and deploying. configured to evolve.

For example, FIG. 4 is an exemplary view showing a state in which a temporary fixing means is applied to the airbag cushion shown in FIG. 3 .

In this embodiment, as shown in FIGS. 3 and 4, the temporary fixing means 60 is the left end of the first cushion 30 and the right side of the second cushion 40 disposed on both sides of the slit 22. It may include a fixing member 61 that is temporarily fixed to the end (hereinafter referred to as 'fixing part 23').

The fixing member 61 may be formed in a substantially rectangular plate shape having a length equal to or slightly longer than the length of the slit 22 and a predetermined width so as to correspond to the temporary fixing part 23 . Also, the fixing member 61 may be manufactured using a fabric material used in manufacturing the airbag cushion 20 or a cloth material having similar characteristics.

The fixing member 61 is a temporary fixing part (61) in various ways so that one side or both sides can be separated from the temporary fixing part 23 when the airbag cushion 20 is inflated and deployed in a state temporarily fixed to the temporary fixing part 23 ( 23) can be combined.

For example, in the present embodiment, one side of the fixing member 61, the left side when viewed in FIG. 4 is sewn by one or more sewing lines 62 formed along the front-back direction, and the left side of the fixing part 23 It is fixed to, and the right side of the fixing member 61 can be fixed to the right side of the fixing part 23 using one or more hang tags 63.

The hang tag 63 may be formed by applying a hang tag structure applied to general clothing or the like.

For example, FIG. 5 is a cross-sectional view showing the configuration of a hang tag installed in a temporary fixing unit.

As shown in FIG. 5, the hang tag 63 is a body 631 penetrating the temporary fixing part 23 and the fixing member 61 of the airbag cushion 20 and both ends of the body 631, respectively. It may include first and second fixing

parts

632 and 633 formed to be orthogonal to 631 .

It will be described that the first fixing part 632 is disposed inside the temporary fixing part 23 of the airbag cushion 20, and the second fixing part 633 is disposed outside the fixing member 61.

The body 631 and the first and second fixing

parts

632 and 633 may be integrally molded using a synthetic resin material having elasticity such as plastic so that elastic deformation is possible.

The hang tag 63 configured as described above may be partially broken while the airbag cushion 20 is inflated and deployed.

To this end, a notch is formed at a connection between the body 631 and the first fixing part 632 or between the body 631 and the second fixing part 633 of the hang tag 630 so that it can be easily broken. can

As described above, the present invention temporarily fixes the fixing member to the temporary fixing part provided around the slit of the airbag cushion using a sewing method and a hang tag, rolls or folds the airbag cushion in an aligned state, and fixes the fixing member in the event of a vehicle collision. One side of can be easily separated from the fixing part.

Meanwhile, FIGS. 6 to 8 are views each illustrating a modified example of the fixing means shown in FIG. 4 .

As shown in FIG. 6, the fixing member 61 is temporarily attached to the temporary fixing part 23 by using a plurality of pairs of hang tags 63 installed on both sides of the slit 22 at preset intervals along the front and rear directions. can be fixed

Alternatively, as shown in FIG. 7, the fixing member 61 is a sewing method along a pair of sewing lines 62 formed side by side in the front and rear directions on both sides of the slit 22. The fixing member 23 can be temporarily fixed.

Here, a cut line 64 may be formed in the fixing member 61 between the pair of sewing lines 62 so that the fixing member 61 can be easily torn when the airbag cushion 20 is inflated and deployed.

In addition, the fixing member 61 is partially sewn or set a large stitch interval as shown in FIG. 8 so that the fixing member 61 can be easily separated from the fixing part 23 when the airbag cushion 20 is inflated and deployed. may be temporarily fixed.

[Second Embodiment]

9 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a second embodiment of the present invention.

In the airbag device 10 for a vehicle according to the second embodiment of the present invention, as shown in FIG. 9, the fixing member 61 is made of nonwovens when the airbag cushion 20 is inflated and deployed instead of a fabric fabric. It can be manufactured using a material of a material that is easily torn.

For example, the fixing member 61 is provided with a non-woven fabric made of a synthetic resin material such as polypropylene (PP), and can be easily rolled or folded together with the airbag cushion 20 using inherent flexibility. can

These fixing members 61 may be fixed to the temporary fixing part 23 in a sewing manner along a pair of sewing lines 62 spaced apart from left and right by a predetermined interval and formed side by side in the forward and backward directions.

Here, a cut line 64 may be further formed between the pair of sewing lines 62 in the vertical direction so that the fixing member 61 can be easily torn when the airbag cushion 20 is inflated and deployed.

As described above, in the present invention, a non-woven fabric-type fixing member made of a synthetic resin material is temporarily fixed to the temporary fixing part of the airbag cushion by a sewing method, and the first and second cushions are torn when the fixing member is torn when the airbag cushion is inflated and deployed. can be expanded and developed into a desired shape.

[Third Embodiment]

10 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a third embodiment of the present invention.

In the airbag device 10 for a vehicle according to the third embodiment of the present invention, as shown in FIG. 10, the fixing member 61 is made of the same fabric as the airbag cushion 20 or a cloth material having similar characteristics. It is manufactured using, and can be temporarily fixed to the fixing part 23 using a bonding member 65 such as a Velcro fastener.

For example, female and male Velcros may be installed at corresponding portions of the fixing member 61 and the temporary fixing part 23, respectively.

Therefore, the fixing member 61 and the temporary fixing part 23 are temporarily fixed to the coupling of the male and female velcros provided by the joint member 65, and can be easily rolled or folded together with the airbag cushion 20.

Of course, the bonding member 65 may be changed to various types of bonding means capable of temporarily bonding the fixing member 61 and the temporary fixing part 23, such as a double-sided tape, as well as a Velcro fastener.

As described above, in the present invention, the fixing member is temporarily fixed to the temporary fixing part of the airbag cushion using a joint member such as a Velcro fastener or double-sided tape, and the fixing member and the temporary fixing part are separated when the airbag cushion is inflated and deployed, and the first and second fixing parts are separated. 2 The cushion can be inflated and deployed in a desired shape.

On the other hand, in Figure 10, a total of three bonding members including a pair of bonding members 65 provided on both sides of the slit 22 and one bonding member 65 provided on the upper side of the fixing member 61 ( 65) is shown, but the present invention is not necessarily limited thereto, and the bonding member 65 may be provided in pairs, or four or more may be provided and disposed in various positions.

In the above embodiments, the front ends of the first and

second cushions

30 and 40 are partially cut by the slit 22, and the rear ends of the first and

second cushions

30 and 40 are partially cut by the connecting portion 50. Although described as being connected, the present invention is not necessarily limited thereto.

[Fourth Embodiment]

11 is an exploded view of an airbag cushion applied to an airbag device for a vehicle according to a fourth embodiment of the present invention.

As shown in FIG. 11, an airbag device 10 for a vehicle according to a fourth embodiment of the present invention completely cuts an airbag cushion 20 and divides it into two cushions, and divides the airbag cushion 20 into two cushions using a fixing member 61. Temporarily fix the two cushions.

In detail, in the airbag cushion 20, the first and

second cushions

30 and 40 corresponding to both sides of the occupant's upper body and the connecting portion connecting the rear ends of the first and second cushions 30 and 40 ( 50) is also cut by the slit 22.

Accordingly, the connection unit 50 may include first and second connection cushions 51 and 52 respectively connected to rear ends of the first and

second cushions

30 and 40 .

In this way, since the airbag cushion is completely divided according to the present invention, it is possible to completely avoid interference between the airbag cushion and the headrest during a vehicle collision.

On the other hand, as shown in FIG. 11, the first cushion 30, the first connection cushion 51, the second cushion 40, and the second connection cushion 52 are in contact with each other. may be rolled or folded together in a state temporarily fixed by the fixing member 61 and installed on a frame provided on the backrest 12 of the seat 11.

And in Figure 11, it is shown that the fixing member 61 is fixed to the fixing part 23 in a sewing manner along a pair of sewing lines 62 formed on both sides of the slit 22, respectively. However, the present invention is not necessarily limited to this, and as described with reference to FIGS. 4 to 10, the sewing line 62, the hang tag 63, the cutting line 64, the joining member 65, etc. may be changed to apply.

[Fifth Embodiment]

As shown in FIG. 12, the airbag device 10 for a vehicle according to the fifth embodiment of the present invention is completely divided and formed by the slit 22 in the same way as the airbag cushion 20 described with reference to FIG. 11, First and

second slits

24 and 25 may be further provided on both sides of the fixing part 23 with preset lengths from the front end toward the rear side, respectively.

So, in the first and

second chambers

30 and 40 of the airbag cushion 20, the upper protection areas A1 and A3 and the lower protection areas A2 and A4 are respectively formed in the first and

second slits

24 and 25. incised and partially divided.

In addition, first and second

temporary fixing units

24 and 25 are provided at portions in contact with each other in the upper protection areas A1 and A3 and the lower protection areas A2 and A4, respectively. (24, 25) may be temporarily fixed by the first and second fixing members (66, 67), respectively.

Here, the first to

second fixing members

66 and 67 are, as described with reference to FIGS. 4 to 10, a sewing line 62, a hang tag 63, a cutting line 64, and a bonding member 65 The first and

second fixtures

24 and 25 may be temporarily fixed by selectively applying the like.

As described above, the present invention divides the upper protection area and the lower protection area by additionally forming first and second slits on both sides of the slit formed in the center of the first and second cushions, thereby inflating and deploying the airbag cushion in an optimal shape. This can keep occupants safe.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

The present invention is applied to a vehicle airbag device technology that inflates and deploys an airbag cushion installed on a backrest of a seat to restrain both sides and the front of a vehicle occupant to safely protect the occupant in the event of a vehicle collision.

Claims

An airbag cushion that inflates and deploys in a shawl shape toward both sides of the occupant so as to wrap and restrain the entire upper body centering on both shoulders of the occupant in the event of a vehicle collision, and

An inflator generating gas by an impact detection signal when a vehicle collides and supplying gas to the airbag cushion;

The airbag device for a vehicle, characterized in that the airbag cushion is divided and formed by completely or partially incising a central portion to avoid interference with a headrest during inflation and deployment.
According to claim 1,

The airbag cushion includes first and second cushions installed on the backrest of a seat on which an occupant sits, and inflating and deploying forwardly, upwardly, and downwardly at upper ends of both sides of the backrest,

The airbag device for a vehicle according to claim 1, wherein the first and second cushions are partially divided and formed by a slit formed rearward from the center of the front end of the airbag cushion that contacts each other.
According to claim 2,

The slit is formed by cutting a predetermined length from the front end of the first and second cushions toward the rear end,

An airbag device for a vehicle according to claim 1 , wherein rear end portions of the first and second cushions are connected to connecting portions disposed at a rear side of the headrest.
According to claim 1,

The airbag cushion includes first and second cushions installed on the backrest of a seat on which an occupant sits, and inflating and deploying forwardly, upwardly, and downwardly at upper ends of both sides of the backrest,

The first and second cushions are divided and formed by a slit formed in the center of the airbag cushion in contact with each other.
According to claim 2,

In the airbag cushion, a temporary fixing means is temporarily fixed to a temporary fixing portion in contact with the first and second cushions around the slit to maintain alignment during rolling or folding of the airbag cushion. Device.
According to claim 5,

The temporary fixing means includes a fixing member made of the same material as the airbag cushion or a cloth material having similar characteristics,

The fixing member is temporarily fixed to the fixing part by any one or a combination of two or more of a sewing method using a sewing line formed along the front and rear directions on both sides of the slit, a hang tag, and a joint member. airbag device.
According to claim 5,

The temporary fixing means includes a fixing member made of a non-woven fabric made of a synthetic resin material,

The fixing member is temporarily fixed by a sewing method using a pair of sewing lines formed along the front and rear directions on both sides of the slit,

An airbag device for a vehicle, characterized in that a cutting line is formed at the center of the fixing member so as to be torn when the airbag cushion is deployed.
According to claim 5,

The first and second chambers include an upper protection area for protecting the occupant's head, shoulders and upper chest, respectively.

It includes a lower protection area that protects the occupant's lower chest, abdomen and pelvis,

First and second slits dividing the upper protection region and the lower protection region are formed in the first and second chambers, respectively;

An airbag device for a vehicle, characterized in that first and second fixing members are temporarily fixed to the first and second temporary fixing parts that contact each other based on the first and second slits.