KR20200145120A - 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 and is deployed toward both sides of a passenger to cover and restrain the entire upper body, abdomen, and pelvis around passenger′s shoulders in case of a vehicle collision; and a restraining means that is installed on first and second cushions of the airbag cushion deployed from both sides of the passenger, provides support power when the first and second cushions are deployed, and restrains a deployment shape. Accordingly, the lateral stiffness of the airbag cushion is improved in case of a vehicle collision, so that the passenger can be safely protected by effectively restraining both sides and front of the passenger.

Description

Airbag device of automobile {AIRBAG APPARATUS OF VEHICLE}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 protecting an occupant safely by defining a shape in which an airbag cushion is deployed.

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. It is installed on the airbag cushion deployed toward the side and the first and second cushions of the airbag cushion deployed on both sides of the occupant, and includes a limiting means for providing support when the first and second cushions are deployed, and defining a deployment shape. Characterized in that.

As described above, according to the airbag device of the vehicle according to the present invention, the first and second cushions that are expanded and deployed on both sides of the occupant are provided with limiting means to define the deployed shapes of the first and second cushions. And the effect of being able to firmly support the second cushion is obtained.

Accordingly, according to the present invention, by improving the lateral rigidity of the airbag cushion in the event of a collision of a vehicle, it is possible to effectively restrain both side surfaces and the front surface of the occupant to securely protect the occupant.

Further, according to the present invention, it is possible to securely protect the lower body of the occupant by effectively restraining the pelvis or thigh of the occupant by using the limiting means for limiting the deployment shape of the airbag cushion.

1 is a perspective view of an airbag device of a vehicle according to a preferred 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 configuration diagram of an airbag cushion and a tether applied to the airbag device of a vehicle according to the first embodiment of the present invention;
5 is an operating state diagram of the connecting member shown in FIG. 4;
6 to 8 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a second embodiment of the present invention;
9 to 11 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a third embodiment of the present invention;
12 and 13 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a fourth 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 protects the occupant safely by expanding and deploying airbag cushions on both sides and front of the upper body including the head and chest of the occupant, and both sides and front of the lower body including the abdomen and pelvis of the occupant around both shoulders of the occupant do.

In particular, in the present invention, a tether is installed inside or outside the airbag cushion to limit the deployed shape of the airbag cushion, thereby improving lateral rigidity, thereby effectively restraining the occupant.

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.

1 is a perspective view of an airbag device of a vehicle according to a preferred 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.

As shown in Figs. 1 to 3, the airbag device 10 of a vehicle according to a preferred embodiment of the present invention has a shawl shape so as to wrap and restrain the entire upper body around both shoulders of the occupant when a vehicle crashes. It includes an airbag cushion 20 that is formed to be deployed toward both sides of a passenger, 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.

As described above, the configuration of the airbag cushion has been described in detail with reference to FIGS. 1 to 3, but the present invention is not necessarily limited thereto.

That is, according to the present invention, the number, shape, length, and size of chambers and chamber walls provided in the airbag cushion may be variously changed so that the airbag cushion is deployed in various shapes and sizes according to conditions for protecting the occupants.

On the other hand, when a collision accident occurs in the airbag device 10 of a vehicle configured as described above, it is difficult to effectively restrain the occupants only by controlling the shape of the airbag cushion as the airbag cushions are open to both sides or upwards.

Accordingly, according to the present invention, a limiting means is installed inside or outside the airbag cushion to limit the deployed shape of the airbag cushion to improve lateral rigidity, thereby effectively restraining the occupant.

FIG. 4 is a configuration diagram of an airbag cushion and a tether applied to an airbag device of a vehicle according to the first embodiment of the present invention, and FIG. 5 is a diagram illustrating an operation state of the connecting member shown in FIG. 4.

In the present embodiment, the airbag cushion 20 may have its deployment shape limited by the limiting means 60 provided with one first tether 61 fixed to both sides of the seat 11, as shown in FIG. 4. have.

Both ends of the first tether 61 may be fixed to both sides of the seat frame 15 provided inside the seat 11.

And one side of the first tether 61, as seen in FIG. 4, the left side is disposed upward along the front of the second cushion 40, and is horizontally disposed rearward along the outer surface of the upper end of the second cushion 40. , After passing through the upper left portion of the second cushion 40 or the left end of the connecting portion 50 and inserted into the interior of the airbag cushion 20, it may be installed horizontally along the inner surface of the connecting portion 50.

To this end, a through hole 43 may be formed at the upper end of the second cushion 40 or at the left end of the connecting portion 50 so that the first tether 61 can be inserted into the airbag cushion 20.

Subsequently, the first tether 61 passes through the upper end of the first cushion 30 or the other end of the connecting portion 50, that is, the right end in FIG. 4 and is drawn out of the airbag cushion 20, and the first cushion ( It can be arranged horizontally in the front along the outer surface of the upper part of 30).

To this end, a through hole 33 may be formed at an upper end of the first cushion 30 or a right end of the connection part 50 so that the first tether 61 can be withdrawn to the outside of the airbag cushion 20.

In addition, the first tether 61 is disposed downward along the front surface of the first cushion 30.

Here, a fixing member 70 for fixing the first tether 61 may be installed on the front surfaces of the first cushion 30 and the second cushion 40.

The fixing member 70 stably fixes the first tether 61 to the airbag cushion 20 and prevents it from being separated from the airbag cushion 20 when the airbag cushion 20 is inflated and deployed. 30) and the second cushion 40 may be spaced apart from each other by a predetermined distance, and a plurality of them may be installed.

The fixing member 70 is formed in a substantially rectangular plate shape or strip shape, and, like the limiting means 60, may be manufactured using the same or similar fabric material as the airbag cushion 20.

That is, a space in which the first tether 61 is disposed is provided inside the fixing member 70, and both ends of the fixing member 70 are fixed to the first cushion 30 or the second cushion 40 by a sewing method. Can be.

Meanwhile, in the present embodiment, it has been described that the position of the first tether 61 is fixed using the fixing member 70, but the present invention is not limited thereto.

For example, in the present invention, instead of installing the fixing member 70, by directly sewing on the first cushion 30 or the second cushion 40 at regular intervals at both ends and the center portion of the first tether 61 The position of the first tether may be fixed in various ways, such as a method of partially forming and fixing a plurality of sewing parts on the first tether 61.

Meanwhile, both ends of the first tether 61 fixed to the seat frame 15 may be connected to each other as shown in FIGS. 4 and 5.

That is, both ends of the first tether 61 may be connected to each other to be provided in a single loop shape.

Alternatively, both ends of the first tether 61 may be connected by separate connecting members 80.

In this way, when both ends of the first tether 61 are connected to each other, the lower portion or the connecting member 80 of the first tether 61 is disposed inside the seat 11, as shown in FIG. 5, and the airbag When the cushion 20 is deployed, it may be drawn out through a cut line (not shown) formed in the cover of the seat 11.

Therefore, the lower part of the first tether 61 or the connecting member 80 pulls both sides and lower surfaces of the passenger's pelvis or thigh toward the center when the airbag cushion 20 is deployed to restrain it.

Accordingly, according to the present invention, the lower body of the occupant can be safely protected by effectively restraining the pelvis or thigh of the occupant by using a tether that defines the deployed shape of the airbag cushion.

Meanwhile, in the present embodiment, it has been described that the connecting member 80 is connected to both ends of the first tether 61, but the present invention does not connect the connecting member 80 to both ends of the first tether 61, It may be changed to connect to the lower end of the first and second cushions 30 and 40.

That is, in the present invention, both ends of the connecting member 80 may be connected to the lower ends of the first cushion 30 and the second cushion 40, respectively, and the connecting member 80 may be embedded in the seat 11.

Therefore, in the present invention, when the airbag cushion is expanded and deployed due to a collision of a vehicle, the connecting member is drawn out of the seat to limit the deployment shape of the lower ends of the first and second cushions, and at the same time, the pelvis or thigh of the occupant may be restrained have.

6 to 8 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a second embodiment of the present invention.

In this embodiment, as shown in FIGS. 6 to 8, the airbag cushion 20 includes second to second ends of the backrest frame 14 provided inside the backrest 12 of the seat 11, respectively. The deployment shape may be limited by any one of the 4 tethers 62 to 64.

The backrest frame 14 may be formed in a substantially rectangular frame shape by providing a space in the central portion.

The upper and lower ends of the second tether 62 are fixed to the upper and lower frames of both sides of the backrest frame 14, respectively, as shown in FIG. 6.

For example, both ends of the second tether 62 may be fixed to the lower ends of the frames on both sides of the backrest frame 14 or on both sides of the seat frame provided on the seat 11.

And the second tether 62 is disposed inclined rearward and upward along the outer surface of the second cushion 40, the upper end of the second cushion 40 or one end of the connecting portion 50, that is, the left as viewed in FIG. After passing through the stage and being inserted into the inside of the airbag cushion 20, it may be installed horizontally along the inner surface of the connection part 50.

To this end, a through hole 43 may be formed at the upper end of the second cushion 40 or at the left end of the connecting portion 50 so that the second tether 62 can be inserted into the airbag cushion 20.

Subsequently, the second tether 62 passes through the upper end of the first cushion 30 or the other end of the connecting portion 50, that is, the right end as viewed in FIG. 6 and is drawn out of the airbag cushion 20, and the first It may be disposed to be inclined forward and downward along the outer surface of the cushion 30.

To this end, a through hole 33 may be formed at the upper end of the first cushion 30 or at the right end of the connection part 50 so that the second tether 62 can be pulled out of the airbag cushion 20.

Here, a fixing member 70 fixing the position of the second tether 64 is installed on the outer surfaces of the first cushion 30 and the second cushion 40 for stable tether routing of the second tether 62. I can.

The fixing member 70 stably fixes the second tether 62 to the outer surface of the airbag cushion 20 and prevents it from being separated from the airbag cushion 20 when the airbag cushion 20 is inflated and deployed. A plurality of cushions 30 and the second cushions 40 may be spaced apart from each other by a predetermined distance and may be installed on the outer surfaces of the cushions 30 and 40.

The fixing member 70 is formed in a substantially rectangular plate shape or a strip shape, and, like the limiting means 60, may be manufactured using the same or similar fabric material as the airbag cushion 20.

This fixing member 70 is provided with a space in which the second tether 62 is disposed, and both ends of the fixing member 70 are to be fixed to the first cushion 30 or the second cushion 40 by a sewing method. I can.

Meanwhile, in the present embodiment, it has been described that the position of the tether is fixed using the fixing member 70, but the present invention is not limited thereto.

For example, in the present invention, instead of installing the fixing member 70, the second tether 62 is directly sewn to the first cushion 30 or the second cushion 40 to partially attach the second tether 62. It is also possible to fix the position of the tether in various ways, such as a method of forming and fixing the sewing part.

As described above, the present invention connects both ends of one second tether to the lower end of the backrest frame or both sides of the seat frame, and uses a plurality of fixing members to firmly secure the fourth tether disposed on the outer surfaces of the first and second cushions. Can be fixed.

Accordingly, the present invention can improve the lateral rigidity of the first and second cushions by using the second tether and the fixing member.

Meanwhile, in the present embodiment, it has been described that both ends of the second tether 62 are fixed to the lower ends of the frames on both sides of the backrest frame 14 or on both sides of the seat frame provided on the seat 11, but the present invention is not necessarily limited thereto. no.

That is, as shown in FIG. 7, the second tether 62 may be fixed to an inflator stud installed in the lower or central portion of the frame on both sides of the backrest frame 14, or inside the backrest 12, respectively.

To this end, both ends of the second tether 62 are inserted from the outer surface to the inner surface of the first and second cushions 30 and 40 through the through holes 33 and 43, respectively, and are horizontally bent toward the rear and then arranged. , It may be fixed to the lower or central portion of the frame on both sides of the backrest frame 14, or to the inflator studs.

As described above, the present invention is configured by bending both ends of the second tether horizontally toward the rear along the inner surfaces of the first and second cushions, respectively, and fixing them to the lower end or the center of the frame on both sides of the backrest frame, or to the inflator studs. 2 The lateral rigidity of the cushion can be further improved.

Alternatively, one end of the second tether 62, as seen in FIG. 8, the right end is bent toward the rear along the inner surface of the first cushion 30, and then the right end of the fourth tether 64 is a backrest frame (14) It can be fixed to the lower part or the center of the right frame, or to the inflator stud.

And the other end of the second tether 62, as seen in FIG. 8, the left end is fixed to the inner surface of the second cushion 40 by the fixing member 70, and the left end of the second tether 62 is an inflator stud Can be fixed to

Of course, in the present invention, after the left end of the second tether 62 is bent toward the rear, it is fixed to the lower part or the center of the left frame of the backrest frame 14 or to the inflator stud, and the right side of the second tether 62 The end may be fixed to the inner surface of the first cushion 30 and the right end of the second tether 62 may be fixed to the inflator stud.

As described above, in the present invention, one end of the second tether is horizontally bent toward the rear and fixed to the lower or central portion of the frame on both sides of the backrest frame, or to the inflator stud, and the other end is fixed to the inflator stud. It is also possible to give different lateral stiffness of.

9 to 11 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a third embodiment of the present invention.

In this embodiment, the airbag cushion 20 includes a pair of third tethers 63, each of which both ends are coupled to both sides of the frame 14 provided inside the backrest 12, as shown in FIG. By this, the developed shape may be limited.

The upper and lower ends of the pair of third tethers 63 may be fixed to the upper and lower ends of the frames on both sides of the backrest frame 14, respectively.

For example, the upper and lower ends of the third tether 63 installed on the right side of the backrest 12 are the upper and lower ends of the backrest frame 14 so as to limit the deployment shape of the first cushion 30 expanded and deployed on the right side of the occupant. It can be fixed to the right frame.

And the third tether 63 is disposed to be inclined upward or forward and upward along the inner surface of the first cushion 30 with the upper end fixed to the upper right frame of the backrest frame 14, and the first cushion 30 ) Through the upper end of the air bag can be drawn out of the cushion 20.

To this end, a through hole 33 may be formed in the non-inflated area formed by the chamber wall in order to draw the third tether 63 to the outside of the airbag cushion 20 at the upper end of the first cushion 30. .

Subsequently, the third tether 63 may be disposed downward along the outer surface of the first cushion 30 from the top side to the bottom side of the first cushion 30.

In addition, the third tether 63 penetrates the lower end of the first cushion 30 and is inserted into the airbag cushion 20, and is disposed inclined toward the rear and downward along the inner surface of the first cushion 30, The lower end of the third tether 63 may be fixed to the lower end of the right frame of the backrest frame 14.

To this end, a through hole 33 may be formed at the lower end of the first cushion 30 to insert the third tether 63 into the inside of the airbag cushion 20.

Similarly, the third tether 63 installed on the left side of the backrest 12, the upper end of the third tether 63 installed on the left side of the backrest frame 14, is In a fixed state, the second cushion 40 may be sequentially disposed on the inner surface, the outer surface, and the inner surface of the second cushion 40, and then the lower end may be fixed to the lower portion of the left frame.

As described above, the present invention defines the unfolded shape of the first and second cushions by installing a pair of third tethers along the inner and outer surfaces of the first and second cushions expanded and deployed on both sides of the occupant and the inner surface again, The first and second cushions may be firmly supported.

Accordingly, according to the present invention, by improving the lateral rigidity of the airbag cushion in the event of a collision of a vehicle, both side surfaces and front surfaces of the occupant can be effectively restrained to protect the occupant safely.

Meanwhile, in the present embodiment, it has been described that both ends of the third tether are connected to the upper and lower ends of the frames inside the backrest, respectively, but the present invention is not limited thereto.

That is, the upper and lower ends of the third tether 63 may be fixed to the middle portions of the frames on both sides of the backrest frame 14, respectively, as shown in FIG. 10.

Therefore, each third tether 63 is disposed forward and upward along the inner surfaces of the first and second cushions 30 and 40, and is drawn out to the outside of the first and second cushions 30 and 40 to It is disposed downwards along the outer surfaces of the second cushions 30 and 40, and is inserted into the first and second cushions 30 and 40 again, It can be arranged inclined upwards.

As described above, the present invention may further improve the lateral rigidity of the first and second cushion intermediate portions in the airbag cushion by connecting both ends of the pair of third tethers to the intermediate portions on both sides of the backrest frame.

Alternatively, the upper ends of the third tether 63 are fixed to the upper ends of the frames on both sides of the backrest frame 14, as shown in FIG. Can be fixed on the part

Therefore, each of the third tether 63 is disposed to be inclined forward and upward along the inner surfaces of the first and second cushions 30 and 40, and is drawn out to the outside of the first and second cushions 30 and 40 to be first And is disposed downward along the outer surfaces of the second cushions 30 and 40, and is inserted into the first and second cushions 30 and 40 again to approximately along the inner surfaces of the first and second cushions 30 and 40 It may be disposed horizontally toward the rear, or may be disposed slightly inclined toward the rear and upwards.

In this way, the present invention can further improve the lateral rigidity of the first and second cushion intermediate and upper ends in the airbag cushion by connecting both ends of the pair of third tethers to the upper and intermediate portions of the frames on both sides of the backrest frame, respectively. .

12 and 13 are configuration diagrams of an airbag cushion and a tether applied to an airbag device of a vehicle according to a fourth embodiment of the present invention.

In this embodiment, as shown in FIGS. 12 and 13, the airbag cushion 20 is a fourth tether that has both ends fixed to the inner surfaces or upper ends of the first and second cushions 30 and 40 for stable tether routing. The deployment shape can be defined by (64).

As shown in FIG. 12, the fourth tether 64 is horizontally disposed on the inner surface of the connection part 50, and both ends of the eighth tether 68 are respectively a first cushion 30 and a second cushion. It can be fixed to the inner surface of the upper part of 40) by a sewing method.

To this end, sewing portions 71 that are sewn on inner surfaces of the first cushion 30 and the second cushion 40 may be provided at both ends of the fourth tether 64, respectively.

Of course, the present invention may be modified so that fixing members are installed at positions where both ends of the fourth tether are to be installed, and both ends of the seventh tether are sewn and fixed to each fixing member.

As described above, the present invention implements stable tether routing by fixing both ends of the fourth tether to the inner surfaces of the upper end portions of the first cushion and the second cushion, thereby limiting the deployment shape of the upper portion of the airbag cushion, thereby improving lateral rigidity.

Alternatively, as shown in FIG. 13, the fourth tether 64 is disposed horizontally and spaced apart by a predetermined distance in front of the connection part 50 when the airbag cushion 20 is inflated and deployed, and the fourth tether 64 Both ends of the first cushion 30 and the second cushion 40 may be fixed by a sewing method to the upper end of each.

As described above, according to the present invention, by fixing both ends of the fourth tether to the upper ends of the first cushion and the second cushion to implement stable tether routing, it is possible to improve lateral rigidity by limiting the deployment shape of the upper 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 expands and deploys when a vehicle crashes to restrain and protect an occupant.

10: car airbag device
11: seat 12: backrest
13: headrest 14: backrest frame
15: seat frame
20: airbag cushion 21: inflator
30: first cushion 31, 32: inner, outer panels
33: through hole
40: second cushion 41, 42: inner and outer panels
43: through hole
50: connection part 51: introduction part
60: limiting means 61 to 69: first to ninth tether
70: fixing member 71: sewing part
80: connecting member

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.
A vehicle, characterized in that it includes a limiting means installed on the first and second cushions of the airbag cushions deployed on both sides of the occupant, providing support when the first and second cushions are deployed, and defining a deployment shape. Airbag device. The method of claim 1,
The limiting means is provided with one first tether having both ends fixed to both sides of the sheet,
The first tether is disposed upwardly along the front surface of the second cushion, and after being disposed rearward along the outer surface of the upper end of the second cushion, the upper end of the second cushion or the upper end of the first cushion and the second cushion It is inserted into the airbag cushion through one end of the connection part connecting the airbag, and is installed horizontally along the inner surface of the connection part, and then passes through the upper end of the first cushion or the other end of the connection part to the outside of the airbag cushion. The airbag device of a vehicle, characterized in that it is drawn out, is disposed forward along an outer surface of an upper end portion of the first cushion, and is disposed downwardly along a front surface of the first cushion. The method of claim 2,
The first tether is formed in a single loop shape, or
Both ends of the first tether are connected by a connecting member,
The lower end of the ninth tether or the connecting member disposed inside the seat is drawn out through the incision line formed in the cover of the seat when the airbag cushion is deployed, and centers both sides and lower surfaces of the passenger's pelvis or thigh. Airbag device of a vehicle, characterized in that the pull toward the restrained. The method of claim 1,
The limiting means includes a first tether defining an unfolded shape of the first cushion and the second cushion
It includes a connecting member connected to both ends of the first cushion and the second cushion lower end,
When the airbag cushion is deployed in a state disposed inside the seat, the connecting member is pulled out through an incision line formed in the cover of the seat, and is restrained by pulling both sides and lower surfaces of the pelvis or thigh of the occupant toward the center. An airbag device for an automobile, characterized in that. The method of claim 1,
The limiting means is provided with one second tether having both ends coupled to a backrest or seat,
Both ends of the second tether are fixed to each other symmetrically to one of the lower or central portions of the frame on both sides of the backrest, the inflator studs, or both sides of the frame of the seat, or are fixed to different positions. The method of claim 5,
The second tether is disposed to be inclined rearward and upward along the outer surface of the second cushion, and penetrates the upper end of the second cushion or through one end of the connecting portion connecting the upper end of the first cushion and the second cushion to the airbag After being inserted into the cushion, it is installed horizontally along the inner surface of the connection part, and is drawn out to the outside of the airbag cushion through the upper end of the first cushion or the other end of the connection part, and the outer surface of the first cushion Airbag device of a vehicle, characterized in that disposed inclined forward and downward along the. The method of claim 1,
The limiting means is provided with a pair of third tethers to which both ends are coupled to both sides of the frame of the backrest,
Both ends of the pair of third tethers are fixed to at least one of an upper end, a central portion, and a lower end of the frame on both sides of the backrest. The method of claim 7,
The pair of third tethers are disposed to be inclined upward or forward and upward along the inner surfaces of the first and second cushions, respectively, and penetrate the upper ends of the first and second cushions to the outside of the airbag cushion. After being withdrawn, the first cushion and the second cushion are disposed downward along the outer surfaces of the first and second cushions from the upper end to the lower end, and pass through the lower ends of the first cushion and the second cushion. An airbag device for an automobile, characterized in that it is inserted into the interior of the airbag cushion and disposed horizontally toward the rear along the inner surfaces of the first and second cushions, or disposed inclined toward the rear and downwards. The method of claim 1,
The limiting means is provided with a fourth tether having both ends fixed to the first and second cushions,
The fourth tether is disposed horizontally on the inner surface of the connecting portion connecting the upper end of the first cushion and the second cushion,
When the airbag cushion is deployed, it is disposed horizontally at upper ends of the first cushion and the second cushion so as to be spaced apart by a predetermined distance in front of the connection part
Both ends of the fourth tether are fixed to the first cushion and the second cushion by a sewing method, or fixed to a fixing member sewn on the first and second cushions. The method according to any one of claims 1 to 8,
In the airbag cushion, a through hole is formed in a portion in which the limiting means is drawn out from the inside of the airbag cushion or inserted from the outside to the inside. The method of claim 10,
An airbag device for an automobile, wherein a plurality of fixing members are installed on an outer surface or an inner surface of the first cushion and the second cushion to fix an installation position of each tether provided by the limiting means.

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