Vehicle seat airbags

Abstract

The present application relates to a seat airbag for a vehicle, comprising: a first cushion and a second cushion, which are arranged at the upper end of a seat back and are respectively deployed upward from both sides of a passenger when deployed, with the ends of the first cushion and the second cushion descending and bending from above the passenger to the front of the passenger; and a third cushion, which is arranged between the first cushion and the second cushion and connects the first cushion and the second cushion.

Description

Technical Field

[0001] The present disclosure relates to a seat airbag for a vehicle, and more particularly, to a seat airbag capable of protecting the safety of a passenger even when a seat is rotated or tilted backward at various angles. Background Art

[0002] In recent years, with the development of autonomous vehicles, the interior space of vehicles is expected to change a lot. As autonomous driving becomes possible, the part of the interior space of vehicles that is expected to change the most is the vehicle's seats.

[0003] Conventional seats mainly perform passive movement such as adjusting height from a fixed position facing the front of the vehicle, but as autonomous driving becomes possible, the driver does not need to drive, so the seats can be actively moved to allow for postures such as facing backward or facing the side.

[0004] However, in the case where the direction of the seat changes greatly, there is a problem that the existing airbag cannot protect the passengers. That is, since the airbag is designed inside the vehicle based on the seat facing forward, if the seat can be rotated or moved, the existing airbag alone cannot effectively protect the passengers in the event of an accident.

[0005] Therefore, even in the case of autonomous vehicles, a technology that integrates airbags into seats to effectively protect passengers is required.

[0006] The above-mentioned contents described as background technology are only provided to enhance the understanding of the background of the present invention and should not be construed as admitting the prior art known to those skilled in the art.

[0007] Prior art literature

[0008] Patent Literature

[0009] (Patent Document 1) US 2017-0247006 A1 Summary of the invention

[0010] 1. Technical issues to be resolved

[0011] The present invention is proposed to solve such problems, and its purpose is to provide a vehicle seat airbag that can be applied to autonomous vehicles and can cope with various seat angles and various collision angles, thereby effectively protecting passengers.

[0012] (II) Technical solution

[0013] A seat airbag for a vehicle according to the present invention for achieving the above-mentioned purpose comprises: a first cushion and a second cushion, which are arranged at the upper end of a seat back and are respectively deployed upward from both sides of a passenger when deployed, with the ends of the first cushion and the second cushion descending and bending from above the passenger to the front of the passenger; and a third cushion, which is arranged between the first cushion and the second cushion and connects the first cushion and the second cushion.

[0014] The first cushion and the second cushion may receive gas from an inflator provided at an upper end portion of the seat back, respectively, and be deployed in a state of being separated from each other on both sides centered on the head of the passenger.

[0015] The third cushion may be in communication with at least one of the first cushion and the second cushion to receive gas from the first cushion or the second cushion and to be deployed.

[0016] When the first cushion or the second cushion is fully deployed, it can be deployed into a shape that wraps around the shoulders of the passenger from above and is curved toward the front of the passenger.

[0017] The third cushion may be located in front of the passenger when fully deployed, and be recessed inwardly from a position supporting the passenger's head in front to be deployed into a recessed shape.

[0018] The seat airbag of the vehicle may further include a first fixing tether, one end of which is fixed to the upper end portion or the side portion of the seat back, and the other end is coupled to the end portion of the first cushion or the second cushion, thereby applying tension to the first cushion or the second cushion when the first cushion or the second cushion is deployed, causing the end portion of the first cushion or the second cushion to rotate forward.

[0019] One end of the first fixing tether may be fixed to the seat back by a driving device, and the driving device is operated to pull the first fixing tether at a preset time point.

[0020] The first fixing tether may be wrapped around the outside of the passenger between one end and the other end thereof and supported to restrict the movement of the passenger.

[0021] The seat airbag of the vehicle may further include: a first connecting tether, one end of which is coupled to the end of the first cushion or the second cushion deployed toward the front of the passenger, and the other end is coupled to the central portion of the first cushion or the second cushion deployed toward the top of the passenger; and a second fixing tether, one end of which is fixed to the upper end or side portion of the seat back, and the other end is coupled between one end and the other end of the first connecting tether.

[0022] The second fixing tether is coupled to one end of the first connecting tether, and the vehicle seat airbag may further include a third fixing tether, one end of which is fixed to the upper end or side portion of the seat back, and the other end is coupled to the other end of the first connecting tether.

[0023] The seat airbag of the vehicle may further include a cover which is folded and disposed at an upper end of the seat back, opens on the first cushion or the second cushion when the first cushion or the second cushion is deployed, and presses the first cushion or the second cushion downward.

[0024] The cover may extend toward both sides to pressurize the upper surfaces of the first cushion and the second cushion simultaneously.

[0025] The seat airbag for the vehicle may further include a fourth fixing tether having one end fixed to an upper end portion or a side portion of the seat back and the other end coupled between the one end portion and the other end portion of the cover.

[0026] The cover can be located on the upper part of the first cushion or the second cushion arranged inside the shell in a folded state, and when one end of the cover is fixed to the shell, when the first cushion or the second cushion is unfolded, the other end of the cover moves upward and forward and opens.

[0027] One end portion of the cover may be formed with a cutting line, and when a tension exceeding a preset tension is applied to the one end portion of the cover, the cover is cut so that a coupling between the cover and the housing is separated.

[0028] (III) Beneficial effects

[0029] The seat safety airbag for a vehicle according to the present invention can cope with various seat angles and various collision angles, thereby protecting the safety of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A seat back of a vehicle on which a seat airbag of the vehicle is provided according to an embodiment of the present invention is shown.

[0031] Figures 2 to 4 A side view, a front view, and a rear view respectively show a state in which a seat airbag of a vehicle according to an embodiment of the present invention is fully deployed.

[0032] Figure 5a to Figure 5c The steps of deploying a seat airbag of a vehicle according to an embodiment of the present invention are shown in sequence.

[0033] Figure 6a and Figure 6b The incorporation of a first securing tether according to one embodiment of the present invention is shown.

[0034] Figures 7 to 10 The incorporation of tethers according to various embodiments of the present invention is shown.

[0035] Fig.11 and Fig.12 A seat airbag for a vehicle including a cover according to an embodiment of the present invention is shown.

[0036] Fig.13a and Fig.13b A cover according to one embodiment of the present invention is shown.

[0037] Description of Reference Numerals

[0038] P: passenger H: passenger's head

[0039] S: Seat back C: Shell

[0040] 10: First cushion 20: Second cushion

[0041] 30: The third cushion DETAILED DESCRIPTION

[0042] The description of the specific structure or function of each embodiment of the present invention disclosed in this specification or this application is only for describing the examples of the embodiments of the present invention. The various embodiments of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in this specification or this application.

[0043] The embodiments of the present invention may be modified in various ways and may have various forms, so specific embodiments will be illustrated in the drawings and described in detail in this specification or this application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and should be understood to include all modifications, equivalents and substitutes covered by the concept and technical scope of the present invention.

[0044] The terms first and / or second can be used to describe various components, but the components should not be limited by the terms. The terms are only used to distinguish one component from another component. For example, without departing from the scope of rights of the concept according to the present invention, the first component can be named as the second component, and similarly, the second component can also be named as the first component.

[0045] When it is stated that one component is “connected” or “coupled” to another component, it should be understood that it can be directly connected or coupled to the other component or there can be other components in between. On the other hand, when it is stated that one component is “directly connected” or “directly coupled” to another component, it should be understood that there are no other components in between. Other terms that describe the relationship between components, i.e., “between” and “directly between” or “adjacent to” and “directly adjacent to”, etc., should also be interpreted in the same way.

[0046] The terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. Unless expressly stated in the specification, the singular includes the plural. In this specification, the terms "including" or "having" should be understood to specify the existence of the stated features, numbers, stages, operations, components, parts or combinations thereof, without excluding the existence or possible addition of one or more other features, numbers, stages, operations, components, parts or combinations thereof.

[0047] Unless otherwise defined, all terms used herein include technical terms and scientific terms, and their meanings are the same as those generally understood by those skilled in the art to which the present invention belongs. Unless explicitly defined in this specification, terms defined in general dictionaries should be interpreted as meanings consistent with the contextual meanings in the relevant technology, and should not be interpreted as idealized or overly formal meanings.

[0048] The present invention will be described in detail below by describing preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals shown in the various drawings represent the same components.

[0049] Figure 1 A seat back S of a vehicle on which a seat airbag of the vehicle is provided according to an embodiment of the present invention is shown. Figures 2 to 4 A side view, a front view, and a rear view respectively show a state in which a seat airbag of a vehicle according to an embodiment of the present invention is fully deployed.

[0050] Reference Figures 1 to 4 A seat airbag for a vehicle according to an embodiment of the present invention includes: a first cushion 10 and a second cushion 20, which are arranged at the upper end of a seat back S and are respectively deployed upward from both sides of a passenger P when deployed, and the ends of the first cushion 10 and the second cushion 20 are descended and bent from above the passenger P to the front of the passenger P; and a third cushion 30, which is arranged between the first cushion 10 and the second cushion 20 and connects the first cushion 10 and the second cushion 20.

[0051] The first cushion 10, the second cushion 20, and the third cushion 30 are disposed in a state before being deployed at the upper end of the seat back S. Specifically, they may be disposed inside the housing C described below. An inflator I may be disposed together inside the housing C, and may expand the first cushion 10, the second cushion 20, and the third cushion 30 according to a collision signal.

[0052] In particular, the opening line T1 of the case C and the seat back S may be located behind the headrest R in the upper end portion of the seat back S. Therefore, the first to third cushions 10 , 20 , and 30 may expand behind the headrest R and rotate forward.

[0053] Figure 5a to Figure 5c The steps of deploying a seat airbag of a vehicle according to an embodiment of the present invention are shown in sequence.

[0054] Refer to Figure 5a to Figure 5c , the first cushion 10 and the second cushion 20 can be respectively unfolded from both sides of the passenger P when unfolded, and can be first unfolded upward and then bent and rotated. Therefore, the end of the first cushion 10 and the end of the second cushion 20 can be lowered and located in front of the passenger P, so that the shoulders of the wearer can be covered from the upper part.

[0055] That is, the first cushion pad 10 and the second cushion pad 20 may be worn in a direction of being rotated in an expanded state from above the passenger P and wrapping the passenger P in the front.

[0056] When the first cushion 10 and the second cushion 20 are fully deployed, they support the passenger's head H on both sides in a shape that wraps around the shoulders of the passenger P on both sides of the passenger's head H, and support the shoulders of the passenger P in the front, thereby restricting the body of the passenger P so that the body of the passenger P does not move.

[0057] The third cushion 30 is disposed between the first cushion 10 and the second cushion 20, and may connect the first cushion 10 and the second cushion 20 to each other. In particular, the third cushion 30 may communicate with the first cushion 10 and the second cushion 20. The third cushion 30 may be located in front of the passenger's head H when fully deployed to support the passenger's head H so that the passenger's head H does not move forward.

[0058] Therefore, the seat airbag for a vehicle including the first cushion 10, the second cushion 20, and the third cushion 30 of the present invention has the effect of simultaneously covering the front and side surfaces of the passenger P to reduce the injury to the passenger.

[0059] Specifically, the first cushion 10 and the second cushion 20 may respectively receive gas from an inflator I provided at an upper end portion of the seat back S, and may be deployed in a state of being separated from each other at both sides with the head H of the passenger as the center.

[0060] The first cushion 10 and the second cushion 20 may simultaneously receive gas from one inflator 1. However, the first cushion 10 and the second cushion 20 may be separated from each other and deployed to the left and right sides of the head H of the passenger.

[0061] The third cushion 30 may communicate with at least one of the first cushion 10 and the second cushion 20 to receive gas from the first cushion 10 or the second cushion 20 and to be deployed.

[0062] The third cushion 30 may communicate with the first cushion 10 or the second cushion 20 through the inner vent hole 31 formed between the third cushion 30 and the first cushion 10 or the second cushion 20. Gas supplied to the first cushion 10 and the second cushion 20 may move to the third cushion 30 through the inner vent hole 31.

[0063] External vent holes 11 may be further formed in the first cushion 10 and the second cushion 20. Therefore, the problem of causing harm to the passenger P due to the internal pressure of the first cushion 10, the second cushion 20, or the third cushion 30 may be prevented.

[0064] Specifically, when the first cushion 10 or the second cushion 20 is fully unfolded, it may be unfolded into a shape that wraps around the shoulders of the passenger P from above and is bent toward the front of the passenger.

[0065] In addition, the third cushion 30 may be located in front of the passenger P when fully deployed, and may be recessed inward from a position supporting the passenger's head H in front to be deployed in a recessed shape.

[0066] When the third cushion 30 is fully unfolded, it can be located in front of the passenger's head H to support the passenger's head H so that the passenger's head H does not move forward. In particular, the surface of the third cushion 30 facing the passenger's head H can be formed in a concave shape, and the passenger's head H is supported by the concave shape, thereby absorbing the impact applied to the passenger's head H and protecting the safety of the passenger P.

[0067] In addition, a base cushion (not shown) provided at the upper end of the seat back S may be further included, and the first cushion 10 and the second cushion 20 may be connected to the base cushion (not shown) to be deployed from the base cushion (not shown), respectively. The base cushion (not shown) may directly receive gas from the inflator 1 and be deployed, and communicate with the first cushion 10 and the second cushion 20 to distribute gas, respectively.

[0068] Figure 6aand Figure 6b The incorporation of a first securing tether 40 according to one embodiment of the present invention is shown.

[0069] Reference Figure 6a and Figure 6b The first fixed tether 40 can be as follows Figure 6a As shown, it can be coupled to the upper end of the seat back S, or it can be as shown Figure 6b As shown, the first fixing tether 40 and each tether described below may be fixed to the frame of the seat back S.

[0070] When the first fixing tether 40 is coupled to the upper end portion of the seat back S, it can be led out through an opening line T1 of the seat back S formed at the upper end portion of the seat back S, and when the first fixing tether 40 is coupled to the side portion of the seat back S, it can be led out through a separate side line that is opened as the side airbag SAB is deployed.

[0071] Figures 7 to 10 The incorporation of tethers according to various embodiments of the present invention is shown.

[0072] First refer to Figure 7 The seat airbag of the vehicle may further include a first fixing tether 40, one end of which is fixed to the upper end portion or the side portion of the seat back S, and the other end is coupled to the end portion of the first cushion 10 or the second cushion 20, thereby applying tension to the first cushion 10 or the second cushion 20 when the first cushion 10 or the second cushion 20 is deployed, so that the end portion of the first cushion 10 or the second cushion 20 rotates forward.

[0073] One end of the first fixing tether 40 is fixed to the seat back S. When the first cushion 10 and the second cushion 20 expand upward to reach a preset length, tension can be applied to the ends of the first cushion 10 and the second cushion 20 combined with the other end of the first fixing tether 40 to guide the first cushion 10 and the second cushion 20 to rotate forward.

[0074] Furthermore, one end of the first fixing tether 40 may be fixed to the seat back S by a driving device 41 that is operated to pull the first fixing tether 40 at a preset time point.

[0075] In one embodiment, the driving device 41 may be a device that uses a pulley to pull the first fixed tether 40. The driving device 41 may be controlled to operate at a time point after a preset time has passed after the inflator 1 is operated.

[0076] Specifically, the driving device 41 can rotate the first cushion 10 and the second cushion 20 after the first cushion 10 and the second cushion 20 are unfolded upward, or operate when the first cushion 10 and the second cushion 20 are rotated and the ends of the first cushion 10 and the second cushion 20 are located in front of the passenger P, so as to utilize the first cushion 10 and the second cushion 20 to pressurize the passenger P for strong support.

[0077] Reference Figure 8 The first fixing tether 40 may wrap around the outside of the passenger P between one end and the other end thereof and support the passenger P to restrict the movement of the passenger P. The first fixing tether 40 may be formed to have a larger width to wrap around the outside of the passenger P. As an embodiment, the first fixing tether 40 may be formed to have a width capable of covering the neck to the shoulder of the passenger P.

[0078] That is, the first fixing tether 40 can restrain the lateral movement of the passenger P while wrapping the passenger P outside the shoulder of the passenger P.

[0079] Reference Fig. 9 The seat airbag of the vehicle may further include: a first connecting tether 50, one end of which is coupled to the end of the first cushion 10 or the second cushion 20 deployed in front of the passenger P, and the other end is coupled to the central part of the first cushion 10 or the second cushion 20 deployed above the passenger P; and a second fixing tether 60, one end of which is fixed to the upper end or side part of the seat back S, and the other end is coupled between one end and the other end of the first connecting tether 50.

[0080] One end and the other end of the first connecting tether 50 can be respectively coupled to the end and the central portion of the first cushion 10 or the second cushion 20 to connect the end side of the first cushion 10 or the second cushion 20 located in front of the passenger P and the central portion of the first cushion 10 or the second cushion 20 located above the passenger P to each other when the first cushion 10 or the second cushion 20 is fully deployed.

[0081] The second fixing tether 60 may be coupled between one end and the other end of the first connecting tether 50 to apply tension to the first connecting tether 50. The tension of the second fixing tether 60 applied to the first connecting tether 50 may be transmitted to one end and the other end of the first connecting tether 50 to be applied to the first cushion 10 or the second cushion 20.

[0082] Reference Fig.10 The second fixing tether 60 is coupled to one end side of the first connecting tether 50. The vehicle seat airbag may further include a third fixing tether 70, one end of which is fixed to the upper end portion or the side portion of the seat back S, and the other end is coupled to the other end side of the first connecting tether 50.

[0083] One end of the second fixing tether 60 and one end of the third fixing tether 70 may be fixed to the seat back S, and the other ends of the second fixing tether 60 and the other ends of the third fixing tether 70 are spaced apart from each other and coupled to the first connecting tether 50. The other ends of the second fixing tether 60 and the other ends of the third fixing tether 70 may be coupled to the first connecting tether 50 and apply tension to the first connecting tether 50.

[0084] The first connecting tether 50 may guide the first cushion 10 or the second cushion 20 to be deployed forward of the passenger P by the combined force of the tensions applied by the second fixing tether 60 and the third fixing tether 70 .

[0085] The second fixing tether 60 and the third fixing tether 70 may be coupled to the first connecting tether 50 in a sewing coupling manner.

[0086] Fig.11 and Fig.12 A seat airbag for a vehicle including a cover 80 according to one embodiment of the present invention is shown. Figure 13a to Figure 13b A cover 80 is shown according to one embodiment of the present invention.

[0087] Refer to Figure 11 to Figure 1 3. The seat airbag of the vehicle may further include a cover 80, which is provided at the upper end of the seat back S in a folded state, opens on the first cushion 10 or the second cushion 20 when the first cushion 10 or the second cushion 20 is deployed, and presses the first cushion 10 or the second cushion 20 downward.

[0088] The cover 80 may be a foldable or curved panel such as a flap. The cover 80 may be provided at the upper end of the seat back S together with the first cushion 10 and the second cushion 20 in a folded state, and may be opened together when the first cushion 10 and the second cushion 20 are deployed, while pressing the first cushion 10 and the second cushion 20 downward at their upper portions.

[0089] Therefore, the first cushion 10 and the second cushion 20 may be guided to rotate downward after being deployed upward.

[0090] The cover 80 may extend toward both sides to pressurize the upper surfaces of the first cushion 10 and the second cushion 20 simultaneously.

[0091] That is, the cover 80 can be folded in a state of being extended long to both sides, and can be extended to be larger than the width of the seat back S to simultaneously cover the first cushion 10 and the second cushion 20. Therefore, there is an effect that the deployment directions of the first cushion 10 and the second cushion 20 can be simultaneously guided by only one cover 80.

[0092] The seat airbag of the vehicle may further include a fourth fixing tether 90 having one end fixed to the upper end portion or the side portion of the seat back S and the other end coupled between the one end portion and the other end portion of the cover 80. The fourth fixing tether 90 may be coupled to the cover 80 adjacent to the other end portion of the cover 80.

[0093] The other end of the fourth fixing tether 90 may be coupled to the cover 80 to apply tension to the cover 80. That is, the fourth fixing tether 90 is coupled to the cover 80, and the cover 80 is in surface contact with the first and second cushions 10 and 20 and presses the first and second cushions 10 and 20 downward, thereby having a stable supporting effect.

[0094] The cover 80 can be located in a folded state on the upper part of the first cushion 10 or the second cushion 20 arranged inside the shell C, so that when one end of the cover 80 is fixed to the shell C, when the first cushion 10 or the second cushion 20 is unfolded, the other end of the cover 80 moves upward and forward and opens.

[0095] like Fig.13a As shown, the cover 80 may be located on the upper portion of the first cushion 10 or the second cushion 20 disposed inside the case C in a folded state, and disposed at the upper end portion of the seat back S together with the case C.

[0096] As an embodiment, the cover 80 may cover the upper portion of the housing C in a folded state. In particular, the cover 80 is folded in a zigzag shape, and thus may be easily opened while the first cushion 10 and the second cushion 20 are unfolded.

[0097] One end portion of the cover 80 may be formed with a cutting line T2, and when tension exceeding a preset tension is applied to the one end portion of the cover 80, the cover 80 is cut so that the coupling between the cover 80 and the case C is separated.

[0098] One end of the cover 80 may be fixed to the case C, and a cutting line T2 is formed between the one end of the cover 80 and the case C, and the cover 80 is cut along the cutting line T2 so that the combination of the cover 80 and the case C is separated.

[0099] Specifically, as the first and second cushions 10 and 20 are deployed, a reaction force is applied to the cover 80 , and when a tension greater than a preset tension is applied to the cover 80 by the reaction force, the cover 80 can be guided to rupture and separate from the housing C.

[0100] As an embodiment, a plurality of slits are formed in the cutting line T2, and the cover 80 can be torn along the extending direction of the slits, so that the connection between the cover 80 and the housing C is separated.

[0101] Furthermore, the cover 80 and the plurality of tethers may be cut by a separate device after guiding the deployment directions of the first cushion 10 and the second cushion 20. Therefore, the deployability of the first cushion 10, the second cushion 20, and the third cushion 30 may be improved.

[0102] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the technical concept of the present invention as provided in the claims.

Claims

1. A seat safety airbag for a vehicle, comprising: The first cushion and the second cushion are arranged at the upper end of the seat back and are respectively unfolded upward from both sides of the passenger when unfolded, and the end of the first cushion and the end of the second cushion descend and bend from above the passenger to the front of the passenger; a third buffer pad, disposed between the first buffer pad and the second buffer pad, and connecting the first buffer pad and the second buffer pad; A first connecting tether, one end of which is coupled to an end portion of the first cushion or the second cushion deployed in front of the passenger, and the other end of which is coupled to a central portion of the first cushion or the second cushion deployed above the passenger; as well as The second fixing tether has one end fixed to the upper end portion or the side portion of the seat back and the other end coupled between one end and the other end of the first connecting tether.

2. The seat airbag for a vehicle according to claim 1, characterized in that: The first cushion and the second cushion receive gas from an inflator provided at an upper end portion of the seat back, respectively, and are deployed in a state of being separated from each other on both sides centered on the head of the passenger.

3. The seat airbag for a vehicle according to claim 1, characterized in that: The third cushion is in communication with at least one of the first cushion and the second cushion to receive gas from the first cushion or the second cushion and to expand.

4. The seat airbag for a vehicle according to claim 1, characterized in that: When the first cushion or the second cushion is fully deployed, it is deployed into a shape that wraps around the shoulders of the passenger from above and is curved toward the front of the passenger.

5. The seat airbag for a vehicle according to claim 1, characterized in that: The third cushion is located in front of the passenger when fully deployed, and is recessed inward from a position supporting the passenger's head in the front to be deployed into a concave shape.

6. The seat airbag for a vehicle according to claim 1, characterized in that: The second fixed tether is coupled to one end of the first connecting tether. The vehicle seat airbag further includes a third fixing tether having one end fixed to an upper end portion or a side portion of a seat back and the other end coupled to the other end side of the first connecting tether.

7. The seat airbag for a vehicle according to claim 1, characterized in that: The invention further comprises a cover which is provided at the upper end of the seat back in a folded state, opens on the first cushion or the second cushion when the first cushion or the second cushion is unfolded, and presses the first cushion or the second cushion downward.

8. The seat airbag for a vehicle according to claim 7, characterized in that: The cover extends to both sides to pressurize the upper surfaces of the first cushion and the second cushion simultaneously.

9. The seat airbag for a vehicle according to claim 7, characterized in that: A fourth fixing tether is further included, one end of which is fixed to the upper end portion or the side portion of the seat back, and the other end of which is coupled between the one end portion and the other end portion of the cover.

10. The seat airbag for a vehicle according to claim 7, characterized in that: The cover is folded and located on the upper part of the first cushion or the second cushion arranged inside the shell. When one end of the cover is fixed to the shell, the other end of the cover moves upward and forward and opens when the first cushion or the second cushion is unfolded.

11. The seat airbag for a vehicle according to claim 10, characterized in that: A cutting line is formed at one end of the cover, and when a tension exceeding a preset tension is applied to the one end of the cover, the cover is cut so that a coupling between the cover and the housing is separated.

12. The seat airbag for a vehicle according to claim 1, characterized in that: Further including: a first fixing tether, wherein a first end of the first fixing tether is fixed to an upper end portion or a side portion of the seat back, and a second end of the first fixing tether is coupled to an end portion of the first cushion or the second cushion, When the first cushion or the second cushion is unfolded, the first fixing tether applies tension to the first cushion or the second cushion, so that an end of the first cushion or the second cushion rotates forward along a predetermined curved path.

13. The seat airbag for a vehicle according to claim 12, characterized in that: The first end of the first fixing tether is fixed to the seat back through a driving device, and the driving device is operated to pull the first fixing tether at a preset time point.

14. The seat safety airbag for a vehicle according to claim 12, characterized in that: The first fixing tether is wrapped around the outside of the passenger between one end and the other end thereof and supported to restrict the movement of the passenger.

Images