KR20210145364A - Seat air bag apparatus for vehicle - Google Patents

Abstract

The present invention relates to a seat airbag apparatus for a vehicle, wherein a buffer member (600) is coupled with an upper surface tether (300), which is deployed together with a side cushion (100) and a front cushion (200), to be extended in a front-rear direction along an inner edge toward a neck (22) of a passenger (20). As the buffer member (600), which is soft and cushiony, touches the neck (22) of the passenger (20), the damage to the neck (22) of the passenger (20) by the upper surface tether (300) is prevented.

Description

Seat airbag device for vehicle {SEAT AIR BAG APPARATUS FOR VEHICLE}

The present invention relates to a seat airbag device for a vehicle that restrains a passenger using a side cushion deployed from the seatback and a front cushion extending from the side cushion, and more particularly, to a seat airbag device that can prevent injury to a passenger due to a top surface tether. it is about technology

An autonomous vehicle is a smart vehicle that is equipped with autonomous driving technology that finds a destination by itself without the driver directly operating the steering wheel, accelerator pedal, or brake.

If the autonomous driving situation is universally realized, the driver can select a relaxation mode to take a break without driving directly while driving the vehicle. it could be

As such, when the seating conditions of passengers are variously changed in the autonomous driving situation, the behavior of passengers cannot be effectively restrained in the event of an accident only with the airbag device provided in the existing vehicle. necessary.

As a seat airbag device that can be applied to autonomous vehicles, it uses a side cushion that deploys forward from the seatback and a front cushion that deploys in front of the passenger from the side cushion to effectively control both lateral, forward and diagonal behavior of the passenger. There is a constraining composition.

As described above, the seat airbag device having the side cushion and the front cushion restrains the deployment of the cushion by using a side tether having a predetermined area rather than a general string-shaped tether, and reinforces the restraint of the passenger by the side cushion and the front cushion. In order to do this, the joint point of the face tether and the seatback is moved to the passenger side as much as possible so that they can be combined.

However, as the joint point of the face tether and the seatback is moved toward the passenger, the interference between the face tether and the passenger's neck increases, and in severe cases, the body (neck) of the passenger is injured by the face tether.

The matters described as the background art above are only for improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the prior art already known to those of ordinary skill in the art.

Republic of Korea Patent Publication No. 10-2019-0020254

The present invention is a configuration in which a cushioning member for preventing passenger injury is applied to the top side tether in a seat airbag device having a side cushion, a front cushion, and a top side tether. The purpose of this is to further strengthen the binding force of the passenger by the side cushion and the front cushion as the joint point of the tether and the seatback can be moved to the passenger side as much as possible.

The present invention provides a seat airbag device for a vehicle to achieve the above object, comprising: a side cushion deployed to protrude forward from the seatback; a front cushion developed to protrude from the side cushion to the front of the passenger; a top surface tether coupled to connect the upper end of the seatback and the side cushion and the front cushion, and spread in a plane when the side cushion and the front cushion are deployed to constrain the deployment of the side cushion and the front cushion; and a cushioning member coupled to one edge of the upper surface tether and providing a cushioning feeling to the passenger by contact with the passenger when the upper surface tether is deployed.

The buffer member is formed of a soft material and characterized in that it is formed in a rod shape with a cushioning feeling.

The buffer member is characterized in that it is formed in the shape of a straight hollow pipe or a straight solid pipe.

The buffer member is characterized in that it is coupled to extend in the front-rear direction along the inner rim toward the passenger's neck in the deployed top surface tether.

an inner edge facing the passenger's neck in the upper side tether surrounds the cushioning member so that the upper side tether and the cushioning member are coupled; It is characterized in that the curved portion of the upper surface tether surrounding the cushioning member is in contact with the body of the passenger.

It is coupled to connect the lower end of the seatback and the front cushion, and when the front cushion is deployed, it is spread flat to prevent the lifting of the front cushion.

It is characterized in that the side cushion and the front cushion, and the upper side tether and the lower side tether are respectively provided symmetrically with respect to the seatback.

The upper side tether is fixedly coupled to any one corner on the upper end of the seatback, one side of the outer side is sewn-coupled to the inner surface of the side cushion with a first sewing line, and one side facing forward is the second side on the upper side of the front cushion. It is characterized in that it is sewn together with a sewing line.

the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback; At the top of the seatback, one corner of the upper right side tether and one corner of the upper left side tether are coupled at the same time by one point coupling, so that the upper right side tether and the upper left side tether are deployed in a V shape.

the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback; At the top of the seatback, one corner of the upper right side tether and one corner of the upper left side tether are respectively coupled to be spaced apart from each other, so that the upper right side tether and the upper left side tether are deployed in the shape of a ?

the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback; One corner of the upper right side tether and one corner of the upper left side tether are crossed in an X shape at the upper end of the seatback and then fixedly coupled to each other so that the upper right side tether and the upper left side tether are deployed in an X shape. Characterized in that.

The second sewing line of the upper side tether is characterized in that it is coupled to extend from side to side along the edge where the front surface and the front surface of the front cushion meet.

the lower tether is composed of a lower right tether and a lower left tether that are symmetrically provided with respect to the seatback; The lower right side tether and the lower left side tether are each fixedly coupled to any one vertex to the lower end of the seatback, and one side facing the front to the bottom of the front cushion is sewn-coupled with a third sewing line, respectively.

The third sewing line of the lower side tether is characterized in that it is coupled to extend from side to side along the corner where the bottom surface and the front surface of the front cushion meet.

The seat airbag device for a vehicle according to the present invention has a configuration in which the side cushion is deployed to protrude forward from the seatback to protect the passenger's side, and the front cushion from the side cushion is deployed to protrude forward of the passenger to protect the front of the passenger. , can be applied to autonomous vehicles in which the movement and rotation of seats and the seating conditions of passengers vary, in particular, it is effective to more effectively protect the passengers of the autonomous vehicle.

In addition, the embodiment according to the present invention is composed of an upper side tether and a lower side tether having a predetermined area so that the tether constraining the deployment of the side cushion and the front cushion exerts a strong binding force, and the passenger's lateral behavior and forward behavior and diagonal As all directional behaviors can be effectively restrained, the protective effect of passengers can be further strengthened, and through this, it is possible to reduce the injuries to passengers as much as possible in the event of an accident.

In addition, the embodiment according to the present invention is a configuration in which the cushioning member is coupled to extend in the front-rear direction along the inner rim toward the passenger's neck from the deployed top surface tether, and the soft and cushiony cushioning member is connected to the passenger's neck and the passenger's neck. As it comes into contact, it is possible to prevent the neck injury of the passenger due to the upper side tether, and in particular, as it is possible to prevent bodily injury to the passenger due to the cushioning member, it is possible to move the coupling point of the upper side tether and the seatback toward the passenger as much as possible. and, through this, there is an effect that can further strengthen the binding force of the passenger by the side cushion and the front cushion.

1 is a perspective view of a vehicle seat airbag device in a deployed state according to the present invention;
2 to 3 are a plan view and a bottom view of Fig. 1,
4 to 5 are views for explaining the development shape of the top surface tether according to the present invention for each embodiment;
6 to 7 are cross-sectional views taken along lines I-I and II-II of Fig. 1;
8 is a view of a buffer member according to the present invention.

Specific structural or functional descriptions of the embodiments of the present invention disclosed in the present specification or application are only exemplified for the purpose of describing the embodiments according to the present invention, and the embodiments according to the present invention are implemented in various forms. and should not be construed as being limited to the embodiments described in the present specification or application.

Since the embodiment according to the present invention may have various changes and may have various forms, specific embodiments will be illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiment according to the concept of the present invention to a specific disclosed form, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one element from another element, for example, without departing from the scope of the present invention, a first element may be called a second element, and similarly The second component may also be referred to as the first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", should be interpreted similarly.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate that the specified feature, number, step, operation, component, part, or a combination thereof exists, and includes one or more other features or numbers. , it should be understood that it does not preclude the existence or addition of steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as meanings consistent with the context of the related art, and unless explicitly defined in the present specification, they are not to be interpreted in an ideal or excessively formal meaning. .

A control unit (controller) according to an exemplary embodiment of the present invention includes a non-volatile memory (not shown) configured to store data relating to an algorithm configured to control the operation of various components of the vehicle or software instructions for reproducing the algorithm; It may be implemented through a processor (not shown) configured to perform operations described below using data stored in the corresponding memory. Here, the memory and the processor may be implemented as separate chips. Alternatively, the memory and processor may be implemented as a single chip integrated with each other. A processor may take the form of one or more processors.

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

As shown in FIGS. 1 to 8, the seat airbag device for a vehicle according to the present invention is deployed to protrude forward from the seatback 10 constituting the seat of the vehicle and covers and protects the side surface of the passenger 20 after deployment. cushion 100; and a front cushion 200 that protrudes from the side cushion 100 to the front of the passenger 20 and covers and protects the front of the passenger 20 after deployment.

The side cushion 100 and the front cushion 200 are each symmetrically configured with respect to the seat back 10, and thus the side cushion 100 is composed of a side right cushion 110 and a side left cushion 120, and , the front cushion 200 is composed of a front right cushion 210 and a front left cushion (220).

In addition, the seat airbag device according to the present invention is coupled to connect the upper end of the seatback 10 with the side cushion 100 and the front cushion 200, and has a predetermined size when the side cushion 100 and the front cushion 200 are deployed. The upper surface tether 300 to constrain the deployment of the side cushion 100 and the front cushion 200 by being spread in the plane of; And it is coupled to connect the lower end of the seat back 10 and the front cushion 200, and when the front cushion 200 is deployed, it is spread in a plane of a predetermined size to prevent the lifting of the front cushion 200. The bottom surface tether 400 constrains the deployment of; further includes.

The top side tether 300 and the bottom side tether 400 are each symmetrically configured with respect to the seatback 10, and thus the top side tether 300 is the top right side tether 310 and the top left side tether 320 ), and the lower side tether 400 is composed of a lower right side tether 410 and a lower left side tether 420 .

The airbag device according to the present invention is deployed such that the side cushion 100 protrudes from the seatback 10, and the side cushion 100 is deployed first, and then the front cushion 200 is continuously deployed from the side cushion 100 and then deployed. is a configuration that enables movement and rotation of the seat, and has the advantage of being suitable for use in an autonomous vehicle with various passenger seating conditions.

In addition, in the embodiment according to the present invention, the tether constraining the deployment of the side cushion 100 and the front cushion 200 is a surface tether having a predetermined area rather than a general string-shaped tether, and in particular, the upper surface tether 300 and It is a configuration that restrains the deployment of the side cushion 100 and the front cushion 200 using the strong restraining force of the lower side tether 400, and through this, the lateral behavior of the passenger and the forward behavior and the behavior in the diagonal direction are all effectively restrained. As a result, the protective effect of passengers can be further strengthened, and as a result, there is an advantage in that the injuries to passengers can be reduced as much as possible in the event of an accident.

The side cushion 100 according to the present invention protects the head 21, shoulders, chest, abdomen, and pelvis from the side of the passenger 20 when deployed, and the front cushion 200 protects the passenger 20 when deployed. ), it is characterized by covering and protecting the area from the shoulder to the abdomen at the same time.

The side cushion 100 and the front cushion 200 both cover and protect the shoulder region of the passenger 20 with relatively high rigidity, and through this, the passenger's injury can be reduced as much as possible.

An inflator that injects airbag gas is fixedly coupled to the seatback frame constituting the seatback 10, and the airbag gas generated when the inflator explodes is supplied in the order of the side cushion 100 and the front cushion 200, and thus the airbag gas By the pressure of the side cushion 100 is deployed first and then the front cushion 200 is deployed.

A plurality of separators are installed inside the side cushion 100 to divide the inner space of the side cushion 100 while determining the thickness of the deployed cushion, and a plurality of separators for controlling the flow of airbag gas Four vent holes are formed.

A separator in which a vent hole is formed may also be installed in a portion where the side cushion 100 and the front cushion 200 are connected.

When the inflator explodes, the side cushion 100 is deployed first and then the front cushion 200 needs to be deployed, so a large amount of airbag gas must first be supplied to the side cushion 100 .

If, before the side cushion 100 is deployed, the front cushion 200 is first inflated and deployed, the front cushion 200 is caught between the passenger 20 and the vehicle door or between the passenger 20 and the center console. It is preferable that the side cushion 100 is deployed first and then the front cushion 200 can be deployed in order to prevent this because the probability of deployment failure due to interference increases.

When the side cushion 100 and the front cushion 200 are deployed, the upper side tether 300 that is deployed together avoids the area that harms the neck 22 of the passenger 20 while passing over the shoulder of the passenger 20 . Thus, it would be desirable to deploy to an area that does not harm the neck 22 of the passenger 20 .

The upper surface tether 300 is formed so that the unfolded shape is any one of a triangle, a square, or a polygon when deployed, and any one corner is fixedly coupled to the upper end of the seat back 10, and the side cushion 100 of the One side of the outer side is sewn-coupled to the upper side of the inner surface by the first sewing line 510 , and one side facing the front is sewn-coupled to the upper surface of the front cushion 200 by the second sewing line 520 .

The upper right side tether 310 is sewn-coupled to the side right cushion 110 and the front right cushion 210 by the first sewing line 510 and the second sewing line 520, and the upper left side tether 310 is also It has a structure in which the side left cushion 120 and the front left cushion 220 are sewn-coupled by the first sewing line 510 and the second sewing line 520 .

When the upper side tether 300 is coupled to the upper end of the seatback 10, one corner of the upper right side tether 310 and one corner of the upper left side tether 320 can be combined at the same time as in FIG. In this case, the upper right side tether 310 and the upper left side tether 320 have a structure that is deployed in a V shape.

As another example, when the upper side tether 300 is coupled to the upper end of the seatback 10, one corner of the upper right side tether 310 and one corner of the upper left side tether 320 are spaced apart from each other left and right as shown in FIG. 2 , respectively. It can be coupled (two-point coupling), and in this case, the upper right side tether 310 and the upper left side tether 320 have a structure that is developed in the shape of a ?

As another example, as shown in FIG. 5 , one corner of the upper right side tether 310 and one corner of the upper left side tether 320 are crossed in an X shape and then each can be fixedly coupled (two-point coupling), in this case The upper right side tether 310 and the upper left side tether 320 have an X-shaped deployment structure.

When the upper right tether 310 and the upper left tether 320 are deployed in a V shape, the tension can be increased more than when deployed in a When the face tether 320 is deployed in an X-shape, it is possible to increase the tension more than when deployed in a ?-shape or a V-shape, so that the passenger can be most effectively restrained.

The bottom tether 400 is formed so that the unfolded shape has a triangular shape having a predetermined area when deployed, and any one of the lower end of the seatback 10 (a stud that fixes the inflator at the lower end of the seatback frame or the lower end of the seatback frame) The vertices of the are fixedly coupled, and one side facing the front on the underside of the front cushion 400 becomes a structure in which the third sewing line 530 is sewn-coupled.

The bottom tether 400 is combined with the bottom surface of the front cushion 400 to prevent the front cushion 400 from being lifted upwards when the front cushion 400 is deployed, and through this, the front cushion 400 It is possible to further strengthen the binding force of

The lower tether 400 has the advantage of being able to more safely protect the passenger 20 because the lower tether 400 formed as a surface can exert a stronger binding force than the conventional tether formed in a string shape.

The lower side tether 400 is composed of a lower right side tether 410 and a lower left side tether 420 provided symmetrically with respect to the seatback 10, the lower right side tether 410 and the lower left side tether ( 420 has a structure in which the front right cushion 210 and the front left cushion 220 are sewn-coupled by the third sewing line 530, respectively.

The second sewing line 520 of the upper surface tether 300 is configured to extend left and right along the edge where the upper surface 201 and the front surface 202 of the front cushion 200 meet, as shown in FIG. , the third sewing line 530 of the lower surface tether 400 is configured to extend left and right along the corner where the bottom surface 203 and the front surface 203 of the front cushion 200 meet.

In this way, by coupling the upper side tether 300 through the second sewing line 520 to the frontmost position of the front cushion 200, and coupling the lower side tether 400 through the third sewing line 530, the front When the passenger 20 is loaded into the chamber 200, sufficient cushioning is first provided and then the passenger 20 can be restrained using the face tethers 300 and 400. have.

In order to strengthen the restraint of the passenger 20 by the side cushion 100 and the front cushion 200, when the top side tether 300 is coupled to the top of the seatback 10, the top side tether 300 and the seatback 10) The coupling point of is moved toward the passenger 20 as much as possible to be coupled.

That is, the coupling point of the upper right side tether 310 and the seatback 10 is moved as far as possible toward the upper left side tether 320 to be coupled, and the coupling point of the upper left side tether 320 and the seatback 10 is at the top The right side tether 310 is moved as much as possible to be coupled.

In this way, when the coupling point of the top side tether 300 and the seatback 10 is moved as much as possible toward the passenger 20 and combined, the tension of the top side tether 300 increases, and the tension of the top side tether 300 As this increases, the binding force of the side cushion 100 and the front cushion 220 is increased, and through this, the passenger 20 can be more reliably restrained, thereby maximally reducing the injury of the passenger in the event of an accident.

However, by moving the coupling point of the upper surface tether 300 and the seatback 10 toward the passenger 20, the upper surface tether 300 and the body of the passenger 20, that is, the neck 22 of the passenger 20 The interference increases, and in severe cases, the neck 22 of the passenger 20 is injured by the upper surface tether 300 .

The present invention is a configuration that can prevent the body (neck) of the passenger 20 from being injured by the upper side tether 300 deployed together with the side cushion 100 and the front cushion 200, for this purpose It is characterized in that it further includes a buffer member 600 coupled to the top surface tether 300 as shown in FIGS. 1 and 7 to 8 .

That is, the buffer member 600 according to the present invention is coupled to one edge of the upper side tether 300 , and when the upper side tether 300 is deployed, the body of the passenger 20 , that is, the neck 22 of the passenger 20 . In a configuration that provides a cushioning feeling to the passenger 20 in contact with the passenger 20 , it is possible to prevent injury to the neck 22 of the passenger 20 with the cushioning feeling provided to the passenger 20 .

In the related art, the sharp one side of the upper side tether 300 deployed together with the side cushion 100 and the front cushion 200 comes in contact with the neck 22 of the passenger 20 to injure the body of the passenger 20. has often occurred.

However, when the cushioning member 600 is coupled to extend in the front-rear direction along the inner edge toward the neck 22 of the passenger 20 in the upper surface tether 300 deployed as in the present invention, the cushioning feeling is improved. As the cushioning member 600 made of a soft material comes in contact with the neck 22 of the passenger 20 to provide a cushioning feeling, it is possible to prevent bodily injury to the passenger 20 by the upper surface tether 300 there will be

The buffer member 600 according to the present invention is formed of a soft material, and has a cushioned bar shape, and may be formed in any one of a straight hollow pipe or a straight solid pipe shape. .

The buffer member 600 is coupled to extend in the front-rear direction along the inner rim toward the neck 22 of the passenger 20 in the deployed top surface tether 300, the passenger 20 in the upper surface tether 300 The inner edge facing the neck 22 of the buffer member 600 is wrapped around the upper surface tether 300 and the buffer member 600 are combined, and thereby the upper surface tether 300 surrounding the buffer member 600 of As the curved portion 301 comes into contact with the neck 22 of the passenger 20 , it is possible to prevent injury to the neck 22 of the passenger 20 .

Reference numeral 540 denotes a fourth sewing line 540 for coupling the upper side tether 300 and the buffer member 600 , and the fourth sewing line 540 is a shape extending back and forth from the deployed upper side tether 300 . becomes this

As described above, in the seat airbag device for a vehicle according to the embodiment of the present invention, the side cushion 100 is deployed to protrude forward from the seatback 10 to protect the side of the passenger 20, and from the side cushion 100 to the front side. The cushion 200 is deployed to protrude forward of the passenger 20 to protect the front of the passenger 20, and the seat movement and rotation and the passenger's seating conditions can be applied to various autonomous vehicles, particularly There is an advantage in that the passenger 20 of the autonomous vehicle can be more effectively protected.

In addition, the embodiment according to the present invention has an upper side tether 300 and a lower side tether 400 having a predetermined area so that the tether constraining the deployment of the side cushion 100 and the front cushion 200 exerts a strong binding force. As it is possible to effectively constrain both lateral, forward, and diagonal behavior of the passenger, the protective effect of the passenger can be further strengthened. have.

In addition, the embodiment according to the present invention is a configuration in which the buffer member 600 is coupled to extend in the front-rear direction along the inner rim toward the neck 22 of the passenger 20 in the deployed top surface tether 300, As the soft and cushiony cushioning member 600 comes into contact with the neck 22 of the passenger 20, it is possible to prevent injury to the neck 22 of the passenger 20 by the top surface tether 300, and in particular As it is possible to prevent bodily injury of the passenger 20 by the cushioning member 600, the coupling point of the upper surface tether 300 and the seatback 20 can be moved toward the passenger 20 as much as possible, and through this There is an advantage that can further strengthen the binding force of the passenger 20 by the side cushion 100 and the front cushion 200 .

Although the present invention has been shown and described with reference to specific embodiments, it is within the art that the present invention can be variously improved and changed without departing from the spirit of the present invention provided by the following claims. It will be obvious to those of ordinary skill in the art.

10 - seatback 20 - passenger
21 - head 22 - neck
100 - side cushion 110 - side right cushion
120 - side left cushion 200 - front cushion
201 - top 202 - front
203 - Bottom 210 - Front Right Cushion
220 - Front Left Cushion 300 - Top Tether
301 - curved part 310 - upper right tether
320 - upper left tether 400 - lower tether
410 - lower right tether 420 - lower left tether
510 - 1st sewing line 520 - 2nd sewing line
530 - 3rd sewing line 540 - 4th sewing line
600 - buffer member

Claims (14)

Side cushions that are deployed to protrude forward from the seatback;
a front cushion developed to protrude from the side cushion to the front of the passenger;
a top surface tether coupled to connect the upper end of the seatback, the side cushion and the front cushion, and spread in a plane when the side cushion and the front cushion are deployed to constrain the deployment of the side cushion and the front cushion; and
and a cushioning member coupled to one edge of the upper tether and providing a cushioning feeling to the passenger by contact with the passenger when the upper tether is deployed. The method according to claim 1,
The cushioning member is formed of a soft material and is a seat airbag device for a vehicle, characterized in that it is formed in a rod shape with a cushioning feeling. 3. The method according to claim 2,
The cushioning member is a vehicle seat airbag device, characterized in that formed in the shape of a straight hollow pipe or a straight solid pipe. 3. The method according to claim 2,
The cushioning member is a vehicle seat airbag device, characterized in that it is coupled to extend in the front-rear direction along the inner rim toward the passenger's neck from the deployed top surface tether. 5. The method according to claim 4,
an inner edge facing the passenger's neck in the upper side tether surrounds the cushioning member so that the upper side tether and the cushioning member are coupled;
The seat airbag device for a vehicle, characterized in that the curved portion of the upper surface tether surrounding the cushioning member is in contact with the body of the passenger. The method according to claim 1,
It is coupled to connect the lower end of the seatback and the front cushion, and when the front cushion is deployed, it is spread flat to prevent the front cushion from being lifted. seat airbag device. 7. The method of claim 6,
The seat airbag device for a vehicle, characterized in that the side cushion, the front cushion, and the upper side tether and the lower side tether are respectively provided symmetrically with respect to the seatback. The method according to claim 1,
The upper side tether is fixedly coupled to any one corner on the upper end of the seatback, one side of the outer side is sewn-coupled to the inner side of the side cushion with a first sewing line, and one side facing the front is the second side on the upper side of the front cushion. A seat airbag device for a vehicle, characterized in that it is sewn-coupled with a sewing line. The method according to claim 1,
the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback;
A seat airbag device for a vehicle, characterized in that one corner of the upper right tether and one corner of the upper left tether are simultaneously coupled to the upper end of the seatback by one-point coupling, so that the upper right tether and the upper left tether are deployed in a V shape. The method according to claim 1,
the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback;
At the upper end of the seatback, one corner of the upper right side tether and one corner of the upper left side tether are respectively coupled to the left and right to be spaced apart from each other, so that the upper right side tether and the upper left side tether are deployed in a ? shape. The method according to claim 1,
the upper side tether is composed of an upper right side tether and an upper left side tether which are symmetrically provided with respect to the seatback;
One corner of the upper right side tether and one corner of the upper left side tether on the upper end of the seatback are fixedly coupled to each other after being crossed in an X shape, so that the upper right side tether and the upper left side tether are deployed in an X shape. seat airbag device. 9. The method of claim 8,
The second sewing line of the upper side tether is coupled to extend from side to side along an edge where the top surface and the front surface of the front cushion meet. 7. The method of claim 6,
the lower tether is composed of a lower right tether and a lower left tether that are symmetrically provided with respect to the seatback;
The lower right side tether and the lower left side tether have one vertex fixed to the lower end of the seatback, respectively, and one side facing the front is sewn-coupled to the bottom of the front cushion by a third sewing line. airbag device. 14. The method of claim 13,
The third sewing line of the lower side tether is coupled to extend from side to side along an edge where the bottom surface and the front surface of the front cushion meet.

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