KR20210119763A - Airbag apparatus of vehicle - Google Patents

Abstract

The present invention relates to an airbag device of a vehicle, which comprises: an airbag cushion inflated and expanded in a shawl shape toward both side surfaces of a passenger to surround and restrain an entire of an upper body based on both side shoulders of a passenger during a collision of a vehicle; and an inflator generating gas by an impact sensing signal during the collision of the vehicle to supply the gas to the airbag cushion. The airbag cushion has a configuration where a center portion is entirely or partially cut to be divided and formed to enable the airbag cushion to be inflated and expanded at an optimal shape on both side surfaces and a front surface of the passenger by avoiding interference with a headrest during the collision of the vehicle to safely protect the passenger.

Description

Airbag device in automobiles

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an airbag device for a vehicle, and more particularly, to an airbag device for a vehicle that is inflated and deployed during a collision to restrain and protect an occupant.

BACKGROUND ART In general, an automobile 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 of an impact sensor during a vehicle collision.

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

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

Meanwhile, in recent years, autonomous vehicles that move by themselves even when the driver does not drive the vehicle are being developed.

The autonomous vehicle uses a high-tech sensor capable of recognizing surrounding objects and a high-performance graphic processing device to detect each device provided in the vehicle and the situation around the vehicle, and controls the operation 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 human, 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 a plurality of cameras, and analyzes the images to help the vehicle safely drive.

For example, the autonomous vehicle may be equipped with LiDAR equipment, sound wave equipment, 3D camera, 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 tilting operation.

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

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

Accordingly, the present applicant has applied for a patent in Patent Document 1, which discloses a configuration of an airbag device for a vehicle capable of safely protecting an occupant by inflating and deploying the airbag on the front and both sides of the occupant during a collision of a vehicle.

Republic of Korea Patent Registration No. 10-2064844 (announced on January 10, 2020)

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 the airbag cushion shown in FIG.

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 is front, upward and downward at both upper ends of the backrest 12 of the seat 11 . The first and second cushions 30 and 40, which are expanded and deployed, and the connecting portion 50 connecting the first and second cushions 30 and 40 are included.

The first and second cushions 30 and 40 have upper protection areas A1 and A3 that protect the head and shoulders and upper chest of the occupant, respectively, and lower protection areas A1 and A3 that protect the lower chest, abdomen and pelvis of the occupant, respectively. A2, A4) may have.

As each of the upper protection areas A1 and A3 and the lower protection areas A2 and A4 protrude forward and rearward with respect to the connection part 50 , the airbag cushion 20 is formed in an approximately 'W' shape. .

That is, in Patent Document 1, in order to minimize interference with the headrest 13 when the airbag cushion 20 is deployed, the front ends to which the first and second chambers 30 and 40 are connected are concavely formed rearward.

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

In addition, the first and second cushions 30 and 40 are formed to protrude forward and backward with respect to the connection part 50 so as to expand and deploy forward, upward and downward on both sides of the occupant.

As described above, Patent Document 1 discloses that both sides of the airbag cushion 20 are formed to protrude toward the front and rear of both sides around the central portion, which is lost in the process of cutting the fabric used for manufacturing the airbag cushion 20 . part increased.

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

SUMMARY OF THE INVENTION An object of the present invention is to provide an airbag device for a vehicle capable of safely protecting an occupant by inflating and deploying airbags on both sides and front of the occupant during a collision of the vehicle.

Another object of the present invention is to provide an airbag device for a vehicle capable of safely protecting a occupant regardless of the occupant's orientation and posture 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 by avoiding interference with the Hesrest when the airbag cushion is deployed.

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

In order to achieve the above object, an 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 that the entire upper body is wrapped around both shoulders of the occupant and restrained when the vehicle collides. and an inflator that generates gas by an impact detection signal upon collision of a vehicle and supplies it to the airbag cushion, wherein the airbag cushion is completely or partially cut in the center to avoid interference with the headrest when inflated and deployed. characterized by being

As described above, according to the airbag device for a vehicle according to the present invention, when a vehicle collides, a shawl-shaped airbag cushion installed on a seat back is inflated and deployed to restrain both sides and front surfaces of the occupant centering on both shoulders of the occupant. can be safely protected.

And, according to the present invention, there is an effect that the occupant can be safely protected regardless of the direction and posture of the occupant in the 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, there is an effect that the airbag cushion can be inflated and deployed in an optimal shape while avoiding interference with the Hesrest when the airbag cushion is deployed.

In addition, according to the present invention, the airbag cushion is formed in a substantially rectangular or oval shape to minimize the loss of fabric fabric when manufacturing the airbag cushion, thereby reducing the manufacturing cost and improving the workability during the manufacturing operation due to the ease of cutting. 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 on a temporary 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 occupant's head and chest, centering on both shoulders of the occupant, thereby restraining the occupant's entire upper body to safely protect the occupant.

In particular, according to the present invention, the airbag cushion is formed in a substantially rectangular shape or an elliptical shape, and a slit is formed in the center of the airbag cushion so that the airbag cushion is expanded and deployed in front and both sides of the occupant in the event of a collision of a vehicle.

Accordingly, according to the present invention, it is possible to reduce manufacturing costs by minimizing the loss of fabric fabric when manufacturing the airbag cushion, and to improve workability during the manufacturing operation because the cutting operation is easy.

And in this embodiment, the configuration of the airbag device installed in the driver's seat of a general vehicle is described, the direction toward the front of the vehicle centered 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)' )' is called. In addition, the terms indicating the direction such as 'left (L)', 'right (R)', 'up (U)' and 'down (D)' indicate each direction based on the front and rear defined as doing

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

Embodiments of the present invention to be described below will be described with reference to the configuration of the airbag device of a vehicle illustrated in FIG. 1 , and will be described with a focus on the configuration of the airbag cushion.

3 is an exploded view of an airbag cushion applied to an airbag apparatus 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 is designed to restrain the occupant by wrapping the entire upper body around both shoulders of the occupant when the vehicle collides. It includes an airbag cushion 20 that is inflated and deployed in a shawl shape toward both sides, and an inflator 21 that generates gas by an impact detection signal upon collision of a vehicle and supplies it to the airbag cushion 20 .

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

To this end, as shown in FIG. 3 , the airbag cushion 20 is formed in a substantially rectangular or elliptical shape, surrounds both shoulders of the occupant, and corresponds to the occupant's head, chest, abdomen, and pelvis. and expands in a shawl shape toward the top and bottom.

In detail, the airbag cushion 20 is installed on the backrest 12 of the seat 11 on which the occupant is seated, and first and second inflated and deployed forward, upward and downward at both upper ends of the backrest 12 . The slit 22 may be formed in the center of the front end of the airbag cushion 20 including the cushions 30 and 40 , where the first and second cushions 30 and 40 are in contact with each other.

That is, the front ends of the first and second cushions 30 and 40 may be separated from each other by being cut by a length corresponding to the slit 22 formed with a preset length from the front end to the rear end. In addition, the rear ends of the first and second cushions 30 and 40 may be connected by the connecting part 50 .

The connection part 50 may be disposed on the rear side of the headrest 13 installed on the upper end of the backrest 12 .

Therefore, according to the present invention, the strength of the airbag cushion can be improved by using the support force of the headrest by disposing the connecting part on the rear side of the headrest to expand and deploy the airbag cushion in a shawl shape.

For example, the slit 22 may be formed to have a length corresponding to each of the upper protective chambers A1 and A3 of the first and second cushions 30 and 40 to be described below.

In addition, the slit 22 may have an approximately 'T' shape as shown in FIG. 3 , or may be formed in an approximately 'Y' shape with both ends of the rear end inclined to the rear side.

As described above, according to the present invention, since the airbag cushion is formed in a square shape or an oval shape, workability can be improved by lowering the difficulty of cutting the fabric for the manufacture of the airbag cushion.

In addition, according to the present invention, the number of airbag cushions disposed on a fabric fabric having a substantially rectangular shape can be increased, and a portion lost during a cutting operation can be minimized, thereby reducing manufacturing costs.

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

So, a wall is formed on the edge of the airbag cushion 20, and each wall and chamber wall is selectively applied by one or more suitable methods among various bonding methods such as adhesive, RF welding, and ultrasonic welding, as well as sewing method or 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 head, shoulder and upper chest of the occupant, and the lower chest, abdomen, and pelvis of the occupant. It may have lower protection regions A2 and A4 to protect it.

And 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 defined by one or more chamber walls 31 and 41, respectively. It may include a plurality of chambers.

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

So, the first cushion 30, the connection part 50, and the second cushion 40 are inflated and deployed to be curved in an approximately '∩' shape when viewed from the front by each chamber wall 31 and 41 at the time of a collision of a vehicle. can

Accordingly, the connection part 50 restrains the head of the occupant from moving to the outside of the headrest 13 during an inclined collision of the vehicle and absorbs the impact caused by the collision, thereby effectively reducing the brain injury of the occupant.

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

For example, each of the introduction units 32 and 42 is configured to preferentially deliver the gas supplied from the inflator 21 to the rear chambers of the first and second cushions 30 and 40 in the event of a collision of the vehicle. 2, the rear wall of the cushions 30 and 40 may be inclined toward the upper front side.

According to the collision characteristics of the far side and the near side of the occupant, the inflator 21 may be provided in two pieces having the same standard, for example, gas generation amount and supply speed, or having different standards.

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

In addition, the first and second cushions 30 and 40 and the rear wall of the connection part 50 may be fixed inside the backrest 12 of the seat 11 using a plurality of fixing members.

Temporary fixing means 60 for temporarily connecting the first and second cushions 30 and 40 by temporarily fixing the portions in contact with the first and second cushions 30 and 40 are provided in the airbag cushion 20 configured as described above. 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 or folded state.

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 alignment state of each cushion 30 and 40 is irregular. Rolled or folded, which may result in an incomplete deployment shape of each cushion 30 , 40 .

Therefore, the present invention provides a temporary fixing means in the slit portion of the airbag cushion, rolls or folds in a state in which the airbag cushion is aligned, and separates the temporary fixing means during inflation and deployment to inflate the first and second cushions into a desired shape, respectively. configured to develop.

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

In this embodiment, the provisional 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, as shown in FIGS. 3 and 4 . It may include a fixing member 61 that is fixed to the end (hereinafter referred to as 'the 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 preset width to correspond to the fixing part 23 . In addition, the fixing member 61 may be manufactured using a woven fabric used for manufacturing the airbag cushion 20 or a fabric material having similar characteristics.

This fixing member 61 is temporarily fixed to the temporary fixing part 23 in various ways so that one or both sides can be separated from the temporary fixing part 23 when the airbag cushion 20 is inflated and deployed in a state of being temporarily fixed to the 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 the left side of the temporary fixing unit 23 in a sewing method by one or more sewing lines 62 formed along the front-rear direction. is fixed to, and the right part of the fixing member 61 may be fixed to the right part of the temporary 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.

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

As shown in FIG. 5 , the hang tag 63 is provided at both ends of the body 631 and the body 631 passing through the temporary fixing part 23 and the fixing member 61 of the airbag cushion 20, respectively. It may include first and second fixing parts 632 and 633 formed to be perpendicular to the 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 material made of a synthetic resin material having elasticity such as plastic to be elastically deformable.

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 may be formed in the connection portion between the body 631 and the first fixing part 632 of the hang tag 630 or the connection portion between the body 631 and the second fixing part 633 so that it can be easily broken. can

As described above, according to the present invention, the fixing member is temporarily fixed to the temporary fixing part provided around the slit of the airbag cushion using a sewing method and a hang tag, and the airbag cushion is rolled or folded in a state in which it is aligned, and the fixing member in the event of a car crash One side of the can be easily separated from the temporary fixing part.

Meanwhile, FIGS. 6 to 8 are views illustrating modified examples of the fixing means shown in FIG. 4 , respectively.

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

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

Here, the cutting line 64 may be formed between the pair of sewing lines 62 in the fixing member 61 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 as shown in FIG. 8 or by setting a large stitch interval so that it can be easily separated from the temporary fixing part 23 when the airbag cushion 20 is inflated and deployed. may be temporarily fixed.

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 formed of nonwovens and It can be manufactured using a material that is easily torn.

For example, the fixing member 61 is made of 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 its inherent flexibility. can

The fixing member 61 may be fixed to the temporary fixing part 23 by a sewing method along a pair of sewing lines 62 that are spaced apart from each other by a predetermined interval on the left and right and are formed side by side in the front and rear directions.

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

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

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, the fixing member 61 is made of the same fabric as the airbag cushion 20 or a cloth material having similar characteristics as shown in FIG. 10 . It may be manufactured using and temporarily fixed to the temporary fixing part 23 using a bonding member 65 such as a Velcro fastener.

For example, male and female Velcro may be installed in the fixing member 61 and the provisional fixing part 23 at portions corresponding to each other, respectively.

Accordingly, the fixing member 61 and the temporary fixing part 23 are temporarily fixed to the coupling of the female and male Velcro provided by the bonding 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, according to the present invention, the fixing member is temporarily fixed to the temporary fixing part of the airbag cushion by using a bonding member such as a Velcro fastener or double-sided tape, and when the airbag cushion is inflated and deployed, the fixing member and the temporary fixing part are separated and the first and second fixing parts are separated. 2 The cushion can be inflated and deployed to the desired shape.

Meanwhile, in FIG. 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 members 65 may be provided as a pair, or may be changed to be arranged in various positions by providing four or more.

In the above embodiments, the front ends of the first and second cushions 30 and 40 are partially cut off by the slit 22 , and the rear ends of the first and second cushions 30 and 40 are connected by the connecting part 50 . Although described as being connected, the present invention is not necessarily limited thereto.

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 , in the airbag device 10 for a vehicle according to the fourth embodiment of the present invention, the airbag cushion 20 is completely cut and divided into two cushions, and divided using a fixing member 61 . Temporarily fix the two cushions.

In detail, in the airbag cushion 20, the connecting part ( 50) is also cut by the slit 22.

Accordingly, the connecting portion 50 may include first and second connecting cushions 51 and 52 respectively connected to the rear ends of the first and second cushions 30 and 40 .

As described above, according to the present invention, since the airbag cushion is completely divided, it is possible to completely avoid the interference between the airbag cushion and the headrest in the event of a vehicle collision.

On the other hand, the first cushion 30 and the first connecting cushion 51 and the second cushion 40 and the second connecting cushion 52 are temporary fixing parts 23 provided in contact with each other as shown in FIG. 11 . may be rolled or folded together in a state of being temporarily fixed by the fixing member 61 and installed on the frame provided on the back 12 of the seat 11 .

And FIG. 11 shows that the fixing member 61 is fixed to the false fixing part 23 in a sewing manner along a pair of sewing lines 62 respectively formed on both sides of the slit 22 . However, the present invention is not necessarily limited thereto, and as described with reference to FIGS. 4 to 10 , the sewing line 62 , the hang tag 63 , the cutout line 64 , the bonding member 65 and the like are selectively selected. It may be changed to apply to

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.

As shown in FIG. 12 , the airbag device 10 for a vehicle according to the fifth embodiment of the present invention is completely divided by the slit 22 in the same manner as the airbag cushion 20 described with reference to FIG. 11 , The first and second slits 24 and 25 may be further provided on both sides of the fixing part 23 with a preset length from the front end to the rear side, respectively.

Thus, 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 located in the first and second slits 24 and 25. incised and partially divided by

In addition, first and second provisional fixing parts 24 and 25 are respectively provided in the respective upper protection areas A1 and A3 and the lower protection areas A2 and A4 in contact with each other, and the first and second provisional fixing portions are provided. (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 , an incision line 64 , and a bonding member 65 . It may be temporarily fixed to the first and second temporary fixing parts 24 and 25 by selectively applying the like.

As described above, according to the present invention, the first and second slits are additionally formed on both sides of the slits formed in the central portion of the first and second cushions to divide the upper protection area and the lower protection area, thereby inflating and deploying the airbag cushion into an optimal shape. This can help keep the occupants safe.

The invention made by the present inventors has been described in detail according to the above embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

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

10: car airbag device
11: seat 12: backrest
13: headrest
20: airbag cushion 21: inflator
22: slits 221 and 222: first and second slits
23: temporary fixing part 24,25: first, second temporary fixing part
30: first cushion 31: chamber wall
32: Introduction
40: second cushion 41: chamber wall
42: Introduction
50: connection part 51,52: first, second connection cushion
60: temporary fixing means 61: fixing member
62: sewing line 63: hang tag
631: body 632,633: first, second fixing part
64: cut line 65: joint member
66, 67: first and second fixing members
A1,A3: upper protection area A2,A4: lower protection area

Claims (8)

An airbag cushion that inflates and deploys in a shawl shape toward both sides of the occupant to restrain the entire upper body centered on both shoulders of the occupant in the event of a car collision;
and an inflator that generates gas according to an impact detection signal upon collision of a vehicle and supplies it to the airbag cushion,
The airbag device of an automobile according to claim 1, wherein the airbag cushion is formed by being completely or partially cut out in a central portion to avoid interference with the headrest when inflated and deployed. According to claim 1,
The airbag cushion includes first and second cushions installed on the backrest of the seat on which the occupant sits, and expanded and deployed forward, upward and downward at both upper ends of the backrest,
and the first and second cushions are partially divided by a slit formed from the center of the front end of the airbag cushion in contact with each other toward the rear. 3. The method of claim 2,
The slit is formed by cutting from the front end to the rear end of the first and second cushions to a preset length,
The airbag device for a vehicle, characterized in that connecting portions disposed on the rear side of the headrest are connected to rear ends of the first and second cushions, respectively. According to claim 1,
The airbag cushion includes first and second cushions installed on the backrest of the seat on which the occupant sits, and expanded and deployed forward, upward and downward at both upper ends of the backrest,
and the first and second cushions are divided by a slit formed in the center of the airbag cushion in contact with each other. 5. The method according to any one of claims 2 to 4,
In the airbag cushion, a temporary fixing means is temporarily fixed to a temporary fixing part in which the first and second cushions are in contact with the slit as a center so as to maintain alignment during rolling or folding of the airbag cushion. Device. 6. The method of claim 5,
The provisional fixing means includes a fixing member made of the same material as the airbag cushion or a cloth material having similar properties,
The fixing member is temporarily fixed to the temporary fixing part by any one or a combination of two or more of a sewing method using a sewing line formed on both sides of the slit along the front-rear direction, a hang tag, and a bonding member. airbag device. 6. The method of claim 5,
The temporary fixing means includes a fixing member provided with a non-woven fabric manufactured using a material made of synthetic resin,
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 cut-out line is formed in the center of the fixing member so as to be torn when the airbag cushion is deployed. 6. The method of claim 5,
The first and second chambers each have an upper protection area that protects the head and shoulder portions of the occupant, and an upper portion of the chest;
a lower protective area protecting the lower chest and abdominal and pelvic areas of the occupant;
First and second slits for dividing the upper protective region and the lower protective region are formed in the first and second chambers, respectively;
The airbag device for a vehicle, wherein first and second fixing members are temporarily fixed to first and second provisional fixing parts that are in contact with each other based on the first and second slits.

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