Airbag support device and control method thereof

Abstract

The present invention relates to an airbag support device and control thereof, wherein the airbag support device includes: an airbag cushion embedded in a side of a seat back and configured to inflate and deploy forward from the seat back; a pop-up tether having one end connected to the seat back and configured to deploy and pass through the airbag cushion in a direction of deployment of the airbag cushion; and a pop-up tether module provided on a side of a seat cushion, connecting the other end of the pop-up tether to one end of a tether rod, and configured to cause the pop-up tether between the seat back and the tether rod to be pulled when the airbag cushion deploys, thereby supporting the airbag cushion by the portion of the pop-up tether that passes through the airbag cushion.

Description

Technical Field

[0001] The present invention relates to an airbag supporting device and a control method thereof, wherein the airbag supporting device supports the side of the airbag while a pop-up tether is fixed to the front of the airbag to ensure the lateral supporting force of the airbag. Background Art

[0002] In the case of using conventional seats, when the vehicle is involved in a side collision, the center box can be supported by the center console of the vehicle to prevent passengers from falling out of the seats.

[0003] However, since the autonomous driving vehicle applies a rotatable rotating seat, it does not have a support such as a center console, making it difficult to support passengers.

[0004] In addition, since various passenger postures may occur, it is difficult to stably support the passenger when the passenger's seating position and seating posture are not in an upright sitting position on the seat.

[0005] Therefore, although airbag systems capable of restraining passengers regardless of the collision direction have been proposed, there is also a problem of limiting the restraining force on the passenger.

[0006] The above content as background explanation is only intended to help understand the background of the present invention, and does not mean that the present invention falls within the scope of the relevant technologies known to those skilled in the art. Summary of the Invention

[0007] The present invention aims to solve the above problems, and one object of the present invention is to provide an airbag supporting device and a control method thereof, which supports the side of the airbag while a pop-up tether is fixed to the front of the airbag to ensure the lateral supporting force of the airbag.

[0008] The present invention comprises an airbag cushion embedded in a side surface of a seat back and configured to expand and deploy forward from the seat back; a pop-up tether having one end connected to the seat back and configured to deploy in a deployment direction of the airbag cushion and pass through the airbag cushion; and a pop-up tether module provided on a side surface of the seat cushion, with the other end of the pop-up tether connected to one end of a tether rod, and configured to pull the pop-up tether located between the seat back and the tether rod when the airbag cushion is deployed, thereby supporting the airbag cushion by the portion of the pop-up tether that passes through the airbag cushion.

[0009] One end of the tether rod to which the other end of the pop-up tether is connected may be an upper end of the tether rod installed to be able to extend upward, and the pop-up tether is configured to be pulled while the tether rod extends upward as the airbag cushion deploys.

[0010] The pop-up tether module may include: a module body, which is coupled to the side of the seat cushion and has a rod hole set on one side of the upper end of the module body, and the tether rod is vertically set inside the module body, its upper end is exposed to the outside of the module body through the rod hole, and the tether rod has a telescopic structure to extend the upper end upward.

[0011] The airbag supporting device further includes an inflator configured to inject gas into the tether rod to extend the tether rod, wherein the inside of the tether rod is hollow and an edge of an upper end of the tether rod has a closed shape.

[0012] An exhaust hole is provided on the side surface of the upper portion of the tether rod to discharge the gas injected into the tether rod.

[0013] A rod connecting ring is provided at the upper end of the tether rod, a tether hole is provided on the other side of the upper end of the module body, a main body connecting ring is provided inside the module body connected to the tether hole, so that the pop-up tether connected to the seat back passes through the rod connecting ring and then passes into the tether hole to pass through the main body connecting ring, and a rod fixing ring is provided at the upper end of the tether rod, and the pop-up tether passing through the main body connecting ring extends from the tether hole to be fixed to the rod fixing ring.

[0014] The module body may include a first space and a second space, the first space being provided with a body connection ring, the second space being installed with an inflator injecting gas into the tether rod, and a partition wall being provided between the first space and the second space.

[0015] The portion of the pop-up tether located between the seat back and the seat cushion is surrounded by a tube.

[0016] A through hole is provided in the middle of the airbag cushion so that the pop-up tether passes through the through hole and is thus sewn to form the circumference of the through hole.

[0017] The airbag supporting device includes: a seat pressure sensor for sensing the load of a passenger seated on the seat; a determination unit for determining whether the passenger's sitting posture is normal based on data detected by the seat pressure sensor; and a restraint control unit for controlling, when a vehicle collision signal is detected, to selectively deploy a pop-up tether and simultaneously deploy the airbag according to the passenger's sitting posture.

[0018] If the passenger's sitting posture is a normal posture, the restraint control unit controls the deployment of the pop-up tether and the airbag; and if the passenger's sitting posture is an abnormal posture, the restraint control unit controls only the deployment of the airbag.

[0019] If the sitting posture of the passenger is an abnormal posture and the abnormal posture continues for a predetermined time or longer, the determination unit controls to warn the passenger of the abnormal sitting posture.

[0020] The airbag cushion and pop-up tether are installed on both sides of the seat back, and the pop-up tether module is installed on both sides of the seat cushion.

[0021] A control method for an airbag support device according to the present invention includes: a posture determination step in which, when a vehicle collision signal is generated, a control unit determines whether a passenger's sitting posture is normal based on data detected by a seat pressure sensor; and a restraint control step in which the control unit performs control so as to selectively deploy a pop-up tether and simultaneously deploy the airbag according to the passenger's sitting posture.

[0022] The restraint control step controls the deployment of the pop-up tether and the airbag if the passenger's sitting posture is a normal posture, and the restraint control step controls the deployment of only the airbag if the passenger's sitting posture is an abnormal posture.

[0023] If the sitting posture of the passenger is an abnormal posture and the abnormal posture continues for a predetermined time or longer, the posture determining step warns the passenger of the abnormal sitting posture.

[0024] With the above construction, the pop-up tether of the present invention passes through the airbag cushion while being pulled between the fixed point connected to the upper end of the tether rod and the seat back, so that the point where the pop-up tether passes through the airbag cushion becomes the supporting point of the pop-up tether for the airbag cushion.

[0025] Therefore, by reliably increasing the lateral restraining force of the airbag cushion, it is possible to prevent a passenger seated on the seat from leaving the side of the seat even in a vehicle having a rotatable seat including a conventional vehicle seat, thereby safely protecting the passenger and improving field safety and marketability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and other advantages of the present invention will be more clearly understood through the following detailed description taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 1. It is a view for explaining the connection relationship of installing the airbag support device according to the present invention on a seat;

[0028] Figure 2 is a view showing a state in which the airbag support device according to the present invention is mounted on a seat;

[0029] Figure 3 is a view showing the shape of the tether rod and the module body according to the present invention before being combined in a separated manner;

[0030] Figure 4 It shows the operation Figure 3 a view of the tether rod shown in its extended position;

[0031] Figure 5 is a cross-sectional view showing a state in which the tether rod according to the present invention is operated to extend the tether rod;

[0032] Figure 6 is a view showing a state in which an airbag supporting device according to the present invention is operated;

[0033] Figure 7 is a view showing a state in which an airbag is deployed together with the airbag supporting device according to the present invention;

[0034] Figure 8 is a view showing another exemplary embodiment in which a pop-up tether according to the present invention is connected; and

[0035] Figure 9 is a flowchart illustrating a control process of the airbag support device according to the present invention. DETAILED DESCRIPTION

[0036] Preferred exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Figure 1 FIG. 1 is a view for explaining the connection relationship between the airbag support device according to the present invention and the seat. Figure 2 It is a view showing a state in which the airbag support device according to the present invention is mounted on a seat.

[0038] Reference Figure 1 and Figure 2 The airbag supporting device according to the present invention includes: an airbag cushion 10, which is embedded in the side surface of the seat back 1 and inflated and deployed forward from the seat back 1; a pop-up tether 20, one end of which is connected to the seat back 1 and is deployed in the direction of deployment of the airbag cushion 10 while passing through the airbag cushion 10; and a pop-up tether module provided on the side surface of the seat cushion 2, so that the other end of the pop-up tether 20 is connected to the end of the tether rod 40, and is configured to tightly pull the pop-up tether 20 located between the seat back 1 and the tether rod 40 when the airbag cushion 10 is deployed, thereby supporting the airbag cushion 10 by the portion of the pop-up tether 20 that passes through the airbag cushion 10.

[0039] More specifically, the airbag may be a side airbag embedded in the side of the seat back 1 , and an airbag module 3 including an airbag inflator that injects gas into the airbag cushion 10 and the like together with the airbag cushion 10 may be installed on both sides of the seat back 1 .

[0040] Therefore, when the airbag is deployed due to a vehicle collision, gas is injected into the airbag cushion 10 by the airbag inflator, and the side airbags are deployed from both sides of the seat back 1 toward the front of the seat.

[0041] In addition, a rear end of the pop-up tether 20 may be fixed to the seat back frame 1 a , and a center thereof is disposed to pass through a center portion of the airbag cushion 10 .

[0042] For example, the airbag cushion 10 is folded and embedded in the airbag module 3 in a state where the pop-up tether 20 passes through the airbag cushion 10 , so that when the airbag cushion 10 is deployed, the pop-up tether 20 is deployed together while passing through the airbag cushion 10 .

[0043] Specifically, the other end of the pop-up tether 20 is connected to the upper end of the tether rod 40 , which is installed to be extendable upward, and as the airbag cushion 10 deploys, the pop-up tether 20 is tightened while the tether rod 40 extends upward.

[0044] In other words, the pop-up tether module is mounted on the front portion of the side of the seat cushion 2, and the tether rod 40 is mounted inside the pop-up tether module, so that the upper end of the pop-up tether 20 extends upward, and the pop-up tether 20 is fixed to the upper end of the tether rod 40, so that the fixing point P1 of the pop-up tether 20 is formed at a front position in the deployment direction of the airbag cushion 10 (such as Figure 7 shown).

[0045] Therefore, the pop-up tether 20 connected between the fixing point P1 and the seat back 1 is tightened to generate tension, and the pop-up tether 20 tightened in this state is deployed in a state of passing through the airbag cushion 10 .

[0046] Therefore, the point where the pop-up tether 20 passes through the airbag cushion 10 becomes the supporting point P2 (eg, Figure 7 ), so that the pop-up tether 20 supports the airbag cushion 10, thereby ensuring the lateral supporting force of the airbag cushion 10 and preventing the passenger from leaving the side of the seat to safely protect the passenger.

[0047] In addition, the airbag cushion 10 and the pop-up tether 20 are installed on both sides of the seat back, and the pop-up tether module is installed on both sides of the seat cushion 2, thereby installing the airbag support device on both sides of the seat so that the passenger can be supported on both sides of the seat, thereby protecting the passenger more safely.

[0048] at the same time, Figure 3 1 is a view separately showing the shape of the tether rod 40 and the module body 30 before being combined according to the present invention, Figure 4 It shows the operation Figure 3 The tether rod 40 is shown in a view showing its extended state. Figure 5 1 is a cross-sectional view showing a state in which the tether rod 40 according to the present invention is operated to be extended.

[0049] Reference Figures 3 to 5 The pop-up tether module according to the present invention includes a module body 30 and a tether rod 40 .

[0050] The module body 30 is coupled to a side surface of the seat cushion 2 and is formed with a rod hole 31 at one side of an upper end thereof.

[0051] Tether rod 40 is vertically and longitudinally disposed within module body 30. Its upper end is exposed to the exterior of module body 30 through rod hole 31, and it is formed into a telescopic structure, with its upper end extending upward. For reference, a rod guide 35 is formed within module body 30, corresponding to the outer diameter of tether rod 40. Tether rod 40 is mounted within rod guide 35.

[0052] In other words, mounting brackets are provided on both sides of the module body 30 , and the module body 30 is combined with the side surfaces of the seat pad 2 through the mounting brackets.

[0053] In addition, a circular rod hole 31 is formed on one side of the upper surface of the module body 30 so that the upper end of the tether rod 40 is disposed through the rod hole 31 .

[0054] Specifically, tether rod 40 has a telescopic structure in which a plurality of cylindrical rods having different diameters are concentrically inserted, and rods having diameters that decrease from the lower portion to the upper portion are installed based on the extended form of tether rod 40 .

[0055] In addition, an inner protrusion is formed on the inner circumferential surface of the upper end of the rod, and an outer protrusion is formed on the outer circumferential surface of the lower end of the rod. Therefore, in the process of each rod moving upward and extending, the inner protrusion and outer protrusion of the two adjacent rods are locked, thereby determining the maximum length of the extension of the tether rod 40.

[0056] In addition, an inflator 50 is provided, which injects gas into the tether rod 40 to extend the tether rod 40.

[0057] In addition, the tether rod 40 is formed such that the inside of the tether rod 40 is hollow while the edge of the upper end of the tether rod 40 has a closed shape.

[0058] For example, the inflator 50 is installed at the lower end of the inside of the module body 30 in the horizontal and length directions, and an igniter 51 is provided at one end of the inflator 50 passing through the module body 30 to ignite the inflator 50 .

[0059] In addition, the lower end of the tether rod 40 is formed to be bent toward the other end of the inflator 50 to be connected to the other end of the inflator 50 , and gas injected from the inflator 50 is supplied into the tether rod 40 , thereby extending the tether rod 40 .

[0060] In other words, when gas is injected into tether rod 40 by inflator 50 , the edge of the upper end of tether rod 40 is pushed upward by the pressure of the gas, thereby extending tether rod 40 .

[0061] In addition, a vent hole 41 may be formed on a side surface of the upper portion of the tether rod 40 to discharge the gas injected into the tether rod 40. In other words, as the upper end of the tether rod 40 extends under the pressure of the gas injected from the inflator 50, a portion of the gas injected into the tether rod 40 is discharged through the vent hole 41, thereby enabling air pressure to be more reliably applied to the edge of the upper end of the tether rod 40.

[0062] at the same time, Figure 6 3 is a view showing an operating state of the airbag supporting device according to the present invention, in which the pop-up tether 20 is fixed to the tether rod 40 through the tether rod 40 and the module body 30, so that in the operating and extended state of the tether rod 40, the pop-up tether 20 located between the seat back 1 and the upper end of the tether rod 40 is tightened.

[0063] Reference Figure 3 and Figure 6 A hemispherical rod connecting ring 42 is formed at the upper end of the tether rod 40, and an oblong tether hole 32 is formed on the other side of the upper end of the module body 30, so that the tether hole 32 is connected to the interior of the module body 30.

[0064] In addition, a body connection ring 33 is formed inside the module body 30 connected to the tether hole 32 so that the pop-up tether 20 connected to the seat back 1 passes through the rod connection ring 42 and then into the tether hole 32 to pass through the body connection ring 33 .

[0065] In addition, a rod fixing ring 43 is formed on a side surface of an upper end of the tether rod 40 , so that the pop-up tether 20 passing through the body connection ring 33 extends from the tether hole 32 to be fixed to the rod fixing ring 43 .

[0066] In other words, when the tether rod 40 is operated to extend, the pop-up tether 20 fixed to the upper end of the tether rod 40 is pulled upward, and the tether is pulled out of the main body connecting ring 33 and the tether is also pulled out of the rod connecting ring 42, so that the portion of the pop-up tether 20 located between the rod connecting ring 42 and the seat back 1 is tightened, thereby generating a tensile force.

[0067] At the same time, refer to Figure 3, a first space 30a and a second space 30b are formed, the first space 30a has a body connecting ring 33 formed inside the module body 30, and the second space 30b has an inflator 50 for injecting gas into the tether rod 40, and a partition wall 34 is formed between the first space 30a and the second space 30b.

[0068] For example, a first space 30a is formed on one side of an upper portion of the module body 30, and a body connection ring 33 is formed in the first space 30a, and before the extension operation of the tether rod 40, a portion of the pop-up tether 20 connected between the body connection ring 33 and the tether rod 40 is located within the first space 30a.

[0069] Therefore, by providing the partition wall 34 between the second space 30 b where the inflator 50 is provided and the first space 30 a to block the space, the portion of the pop-up tether 20 located in the first space 30 a is placed and stored on the upper surface of the partition wall 34, and further, the heat transferred to the pop-up tether is blocked by the inflator 50 and the tether rod 40.

[0070] Then, refer to Figure 2 , a portion of the pop-up tether 20 located between the seat back 1 and the seat cushion 2 has a structure surrounded by a tube 21 .

[0071] In other words, before the airbag cushion 10 is deployed, the pop-up tether 20, while mounted on the seat back 1, passes through the airbag and extends to the seat cushion 2 via the tube 21. At this time, a mark indicating the pop-up tether 20 is provided in the portion of the seat back 1 where the pop-up tether 20 is embedded, thereby indicating the position of the pop-up tether 20.

[0072] Figure 7 1 is a view showing a state in which an airbag is deployed together with the airbag support device according to the present invention.

[0073] Reference Figure 7 A through hole 11 is formed in the middle of the airbag cushion 10 so that the pop-up tether 20 passes through the through hole 11 , and the circumference of the through hole 11 has a sewn structure.

[0074] For example, a through hole 11 is formed in the middle of the airbag cushion 10 so that the middle of the pop-up tether 20 passes through the through hole 11. The cross-sectional area of ​​the through hole 11 is wider than that of the pop-up tether 20, and the periphery of the through hole 11 is sewn, thereby minimizing interference between the pop-up tether 20 and the through hole 11 during deployment of the pop-up tether 20 and the airbag cushion 10.

[0075] At the same time, the present invention determines the seating position, posture, etc. of the passenger seated on the seat to determine whether the pop-up tether 20 needs to be deployed if deployment of the airbag is required.

[0076] Reference Figure 1 and Figure 2 A seat pressure sensor 60 is provided to detect the load of a passenger sitting on the seat.

[0077] In addition, the determination unit 110 determines whether the sitting posture of the passenger is a normal posture using data detected by the seat pressure sensor 60. Here, the determination unit 110 may be an electronic control unit (ECU) including a microprocessor or a processor.

[0078] Therefore, when a collision signal of the vehicle is detected, the restraint control unit 120 controls to selectively deploy the pop-up tether 20 and deploy the airbag according to the passenger's sitting posture. Here, the restraint control unit 120 may be an airbag control unit (ACU).

[0079] Specifically, when the passenger's sitting posture is a normal posture, the restraint control unit 120 controls both the pop-up tether 20 and the airbag to deploy.

[0080] On the other hand, if the passenger's sitting posture is an abnormal posture, the restraint control unit 120 controls only the deployment of the airbag.

[0081] For example, the seat pressure sensor 60 may be provided in the entire area of ​​the seat cushion 2 where the passenger sits, thereby detecting the load of the passenger sitting on the seat.

[0082] Therefore, when the load data detected by the seat pressure sensor 60 is collected, the load data is compared and analyzed with the map data by the determination unit 110 to determine whether the lower end of the passenger's thigh is in a normal position.

[0083] When the determination result indicates that in a normal seating condition where pressure is generated at the lower ends of the passenger's thighs including the passenger's buttocks, when the tether rod 40 is extended by igniting the inflator 50, the airbag cushion 10 is deployed and the pop-up tether 20 is also deployed.

[0084] On the other hand, if pressure is applied to the passenger's buttocks but not to the lower thighs, the passenger's legs are considered to be in an abnormal position, leaving the seat. In this case, when the pop-up tether 20 is deployed, there is a risk of injury to the passenger due to the deployment pressure of the pop-up tether 20. Therefore, only the airbag cushion 10 is deployed without deploying the pop-up tether 20.

[0085] In addition, when the sitting posture of the passenger is an abnormal posture and the abnormal posture continues for a predetermined time or longer, the determination unit 110 controls to warn the passenger of the abnormal sitting posture.

[0086] For example, when an abnormal posture such as a passenger's legs leaving the seat occurs for a long time, the determination unit 110 may generate a message through the dashboard and / or infotainment system indicating that the abnormal sitting posture may reduce the passenger's restraint in the event of an accident to warn the passenger.

[0087] Meanwhile, the method for controlling an airbag supporting device according to the present invention includes: a posture determination step, in which, when a vehicle collision signal is generated, the control unit 100 uses data detected by the seat pressure sensor 60 to determine whether the passenger's sitting posture is a normal posture; and a restraint control step, in which, the control unit 100 controls the pop-up tether 20 to selectively deploy and simultaneously deploy the airbag according to the passenger's sitting posture. In one example, the method for controlling an airbag supporting device according to the present invention includes: a posture determination step, in which, when a vehicle collision signal is generated, the control unit 100 uses data detected by the seat pressure sensor 60 to determine whether the passenger's sitting posture is one of a first posture (e.g., a normal posture) and a second posture (e.g., an abnormal posture); and a restraint control step, in which the control unit 100 controls the pop-up tether 20 to selectively deploy and simultaneously deploy the airbag according to the passenger's sitting posture.

[0088] Specifically, in the restraint control step, when the passenger's sitting posture is a normal posture, the pop-up tether 20 and the airbag are controlled to be deployed; and when the passenger's sitting posture is an abnormal posture, only the airbag is controlled to be deployed.

[0089] In addition, if the sitting posture of the passenger is an abnormal posture and the abnormal posture continues for a predetermined time or longer, the posture determination step may warn the passenger of the abnormal sitting posture.

[0090] For reference, the control unit 100 according to an exemplary embodiment of the present invention can be implemented by a non-volatile memory (not shown) and a processor configured to perform the following operations using data stored in the corresponding memory (not shown), wherein the non-volatile memory is configured to store data related to an algorithm configured to control the operation of various components of the vehicle or software instructions that reproduce the algorithm. Here, the memory and the processor can be implemented as separate chips. Alternatively, the memory and the processor can be implemented as a single chip integrated with each other. The processor can be in the form of one or more processors.

[0091] Figure 9 is a flowchart illustrating a control process of the airbag support device according to the present invention.

[0092] Reference Figure 9 To describe the flow of the control process, a signal for sensing a collision during vehicle operation is monitored ( S10 ).

[0093] During the monitoring process, when a signal for sensing a collision is generated ( S20 ), it is determined whether the thigh of the passenger is in a normal sitting position based on a load detected by the seat pressure sensor ( S30 ).

[0094] As a result of the determination in step S30, if it is determined that the posture of the passenger is the abnormal sitting posture, the inflator 50 is not ignited, and the airbag inflator is ignited to deploy only the airbag (S40).

[0095] On the other hand, as a result of the determination in step S30 , if it is determined that the posture of the passenger is the normal sitting posture, the inflator 50 is ignited to deploy the pop-up tether 20 , and furthermore, the airbag inflator is ignited to deploy the airbag ( S50 ).

[0096] In other words, when Figure 2 When gas is injected into the tether rod 40 by the inflator 50 in the state shown, the edge of the upper end of the tether rod 40 is pushed upward under the action of the gas pressure, so that the tether rod 40 is operated to extend upward, as shown in FIG. Figure 6 shown.

[0097] At this time, by fixing the pop-up tether 20 to the upper end of the tether rod 40 , a fixing point P1 of the pop-up tether 20 is formed at a front position in the deployment direction of the airbag cushion 10 .

[0098] Additionally, during the pulling operation of tether rod 40, pop-up tether 20 fixed to the upper end of tether rod 40 is pulled upward, thereby pulling the tether out of vehicle body connection ring 33 and rod connection ring 42, thereby tightening the portion of pop-up tether 20 between rod connection ring 42 and seat back 1.

[0099] In particular, Figure 7 As shown, when the pop-up tether 20 connected between the fixing point P1 and the seat back 1 is in a tensioned state, the airbag cushion 10 is deployed in the form of passing through a portion of the pop-up tether 20 .

[0100] Therefore, the point where the pop-up tether 20 passes through the airbag cushion 10 becomes a supporting point P2 of the pop-up tether 20 on the airbag cushion 10 , so that the pop-up tether 20 supports the airbag cushion 10 at the side.

[0101] Therefore, by reliably increasing the lateral restraining force of the airbag cushion 10, even in a vehicle having a rotatable seat including a conventional vehicle seat, it is possible to prevent a passenger sitting on the seat from leaving the seat side to safely protect the passenger, thereby improving field safety and marketability.

[0102] In other words, Figure 82 is a view showing another exemplary embodiment in which a pop-up tether 20 according to the present invention is connected, wherein the mounting points of the pop-up tether 20 connected to the seat back 1 may be located at two or more positions at the upper end and the lower end, thereby further increasing the lateral restraining force of the airbag.

[0103] At the same time, although the present invention has been described in detail above only with respect to specific examples, it is obvious to those skilled in the art that various modifications and changes can be made within the technical spirit of the present invention, and these modifications and changes naturally fall within the scope of the appended claims.

Claims

1. An airbag support device, comprising: an airbag cushion embedded in a side of a seat back and configured to inflate and deploy forwardly from the seat back; a pop-up tether having one end connected to the seat back and configured to deploy in a deployment direction of the airbag cushion and pass through the airbag cushion; as well as A pop-up tether module is provided on a side of a seat cushion, with the other end of the pop-up tether connected to one end of a tether rod, and is configured to pull the pop-up tether located between the seat back and the tether rod when the airbag cushion is deployed, thereby supporting the airbag cushion through the portion of the pop-up tether that passes through the airbag cushion, wherein: The pop-up tether module includes a module body coupled to a side surface of the seat cushion and having a rod hole provided on one side of an upper end of the module body. The tether rod is vertically arranged inside the module body, and its upper end is exposed outside the module body through the rod hole, and the tether rod has a telescopic structure so that the upper end extends upward. A rod connecting ring is provided at the upper end of the tether rod. A tether hole is provided on the other side of the upper end of the module body. A body connection ring is provided inside the module body connected to the tether hole, so that the pop-up tether connected to the seat back passes through the rod connection ring and then passes through the tether hole to pass through the body connection ring, and A rod fixing ring is provided at the upper end of the tether rod, and a pop-up tether passing through the main body connecting ring extends from the tether hole to be fixed to the rod fixing ring.

2. The airbag support device according to claim 1, wherein: The end of the tether rod to which the other end of the pop-up tether is connected is the upper end of the tether rod, The upper end of the tether rod is mounted so as to be able to extend upward, and The pop-up tether is configured to be pulled while the tether rod extends upward in accordance with a deployment operation of the airbag cushion.

3. The airbag support device according to claim 1, further comprising: an inflator configured to inject gas into the tether rod to extend the tether rod, The interior of the tether rod is hollow, and the edge of the upper end of the tether rod has a closed shape.

4. The airbag support device according to claim 3, wherein: An exhaust hole is provided on a side surface of an upper portion of the tether rod to discharge the gas injected into the tether rod.

5. The airbag support device according to claim 1, wherein: The module body includes a first space and a second space, the body connecting ring is provided in the first space, an inflator for injecting gas into the tether rod is installed in the second space, and A partition wall is provided between the first space and the second space.

6. The airbag support device according to claim 1, wherein: The portion of the pop-up tether located between the seat back and the seat cushion is surrounded by a tube.

7. The airbag support device according to claim 1, wherein: A through hole is provided in the middle of the airbag cushion so that the pop-up tether passes through the through hole.

8. The airbag support device according to claim 1, comprising: a seat pressure sensor that senses the load of a passenger seated on the seat; a determination unit that determines whether the passenger's sitting posture is a normal posture based on data detected by the seat pressure sensor; as well as The restraint control unit is configured to perform control upon detecting a collision signal of the vehicle so as to selectively deploy the pop-up tether according to the sitting posture of the passenger and deploy the airbag at the same time.

9. The airbag support device according to claim 8, wherein: If the passenger's sitting posture is normal, the restraint control unit controls the pop-up tether and the airbag to deploy, and If the passenger's sitting posture is an abnormal posture, the restraint control unit only controls the airbag to deploy.

10. The airbag support device according to claim 8, wherein: The determination unit controls to warn the passenger of the abnormal sitting posture if the passenger's sitting posture is an abnormal posture and the abnormal posture continues for a predetermined time or longer.

11. The airbag support device according to claim 1, wherein: The airbag cushion and the pop-up tether are installed on both sides of the seat back, and the pop-up tether module is installed on both sides of the seat cushion.

12. A method for controlling an airbag support device according to claim 1, the method comprising: a posture determining step of determining whether the passenger's sitting posture is a normal posture based on data detected by a seat pressure sensor by a control unit when a collision signal of the vehicle is generated, and The restraint control step is performed by the control unit so as to selectively deploy the pop-up tether and deploy the airbag simultaneously according to the passenger's sitting posture.

13. The control method according to claim 12, wherein: If the passenger's sitting posture is normal, the restraint control step controls the pop-up tether and the airbag to deploy, and If the passenger's sitting posture is an abnormal posture, the restraint control step only controls the airbag to deploy.

14. The control method according to claim 12, wherein: The posture determination step warns the passenger of the abnormal sitting posture if the passenger's sitting posture is an abnormal posture and the abnormal posture continues for a predetermined time or longer.

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