KR101718693B1 - Airbag for vehicle - Google Patents

Abstract

An airbag for a vehicle is provided. An airbag cushion having an airbag completely opened upon initial deployment of the airbag cushion and having a vent hole partially closed when the airbag cushion is full; And a vent adjusting device for adjusting the opening and closing state of the vent hole. The vent adjusting device includes a tubular member having a proximal end fixed around the vent hole and a proximal end protruding outward from the airbag cushion when the airbag cushion is initially deployed; A cord member movably connected to the tube member in the circumferential direction of the tube member to partially tighten the distal end portion of the tube member when the airbag cushion is full; A pulling device for pulling the cord member when the airbag cushion is full; And a stopping device for restricting movement of the cord member to limit the degree of closing of the distal end of the tube member.

Description

AIRBAG FOR VEHICLE

The present invention relates to a vehicle airbag having a vent hole that can be sized to adjust the rigidity of the airbag cushion.

Generally, the vehicle is equipped with an airbag for protecting passengers in the event of a vehicle collision.

The airbag cushion of the airbag inflates and protects the passenger by the gas pressure flowing into the inflator from the inflator when the vehicle collides.

The inner volume of a normal airbag cushion is designed to have a deployment pressure to protect a general adult.

Even if the passenger is a general adult, in the case of an OUT of Position (OPP) condition, for example, when the distance between the airbag cushion and the passenger is too close, for example, The passenger may be injured by the excessive initial deployment pressure of the airbag cushion.

Therefore, the airbag cushion requires a deployment pressure adjusting means for adjusting the deployment pressure of the back cushion in accordance with the conditions of the passenger, for example, the physique of the passenger, the seating position of the passenger, and the like.

BACKGROUND ART [0002] An airbag is widely known which provides a vent hole on an airbag cushion to smoothly accommodate a passenger when the passenger touches the inflated airbag cushion, and allows gas to be discharged from the inside of the airbag cushion through the vent hole to the outside of the airbag .

The National Highway Traffic Safety Administration (NHTAS) issued a new FMVSS208 regulation in May 2000. FMVSS208 includes requirements to minimize injury to airbag deployments for OOP children and small adult passengers.

In addition, the National Highway Traffic Safety Administration (NHTAS) evaluates the performance of airbags using a female dummy (AF05 dummy) and a male dummy (AM50 dummy).

[0003] In order to protect passengers of various sizes or seating states as described above, conventionally, airbags having various types of vent holes are known. For example, the airbag cushion is provided with a normally open vent hole (hereinafter referred to as "normal vent hole") and a vent hole (hereinafter referred to as "safety vent hole") in which the vent hole is selectively opened and closed according to the deployed state of the airbag It is known.

US 8,070,183 US 2012/0306187

An object of the present invention is to provide an airbag for a vehicle that can appropriately adjust the internal pressure of an airbag cushion according to a passenger of various sizes or various seating states without providing a plurality of vent holes.

According to an embodiment of the present invention, there is provided an airbag cushion which is completely opened upon initial deployment of the airbag cushion and has a vent hole that is partially closed when the airbag cushion is full; And a vent adjusting device for adjusting the open / closed state of the vent hole.

Wherein the vent adjusting device includes a tubular member having a proximal end fixed around the vent hole and a proximal end protruding from the airbag cushion when the airbag cushion is initially deployed; A cord member movably connected to the tube member in a circumferential direction of the tube member to partially tighten the distal end portion of the tube member when the airbag cushion is full; A pulling device for pulling the cord member when the airbag cushion is full; And a stopping device for restricting movement of the cord member to define a degree of closing of the distal end of the tube member.

Wherein the stopping device comprises at least one opening formed in the tube member so that at least one end of the cord member can be drawn out; And at least one cord stopper provided on the cord member to limit the withdrawal length of the cord member when the cord member is hooked on the opening when the cord member is pulled out through the opening.

Wherein the stopping device comprises at least one opening formed in the tube member so that at least one end of the cord member can be drawn out; And at least one fixing part for fixing the cord member and the tube member at a position spaced apart from the opening by a certain distance in a state that the far end of the tube member is completely opened.

Both ends of the cord member are drawn out through the opening, and the fixing portion can be formed at two positions spaced apart from the opening by a completely opened state of the distal end of the tube member.

The vehicle airbag may further include an anti-slack member for preventing the cord member from being pulled in a direction opposite to the drawing direction of the cord member, thereby preventing the tail end of the tube member, which is tightened by the cord member, from being loosened.

The anti-slack member may be provided on the cord member at a predetermined distance from the cord stopper or the fixing member, and may be configured to be pulled out through the opening of the tube member when the cord member is pulled out.

The opening is formed in a slit shape so that when the code member is pulled out, the anti-slack member passes through the opening, and is caught in the peripheral portion of the slit when the code member is pulled in a direction opposite to the drawing direction of the code member.

Wherein the tube member comprises two cord members which are arranged in a semicircular shape on the tube member and which are arranged to face each other about the central axis of the tube member and which are respectively drawn out through the two openings, can do.

The pulling device may include a connecting member connected to the front side of the airbag cushion, one side of which is connected to the lead end of the cord member and the other side of which is in contact with the passenger.

According to an embodiment of the present invention, the normal vent and the safety vent function can be simultaneously performed through one vent hole.

According to an embodiment of the present invention, the vent hole is completely opened at the time of initial deployment of the airbag, and the vent hole is partially closed when the airbag cushion is full, so that the passenger is smoothly accommodated and suitably accommodated according to the physique, .

According to an embodiment of the present invention, even when the passenger touches the airbag cushion, the vent hole maintains the intended diameter, so that the internal pressure of the airbag cushion suitable for protecting the passenger can be maintained.

1 is a side view illustrating the interior of a vehicle having a fully inflated airbag cushion in accordance with one embodiment of the present invention.
Figure 2 is a perspective view illustrating some inflated airbag cushions in accordance with one embodiment of the present invention.
Figure 3 is a cross-sectional view illustrating some inflated airbag cushions in accordance with one embodiment of the present invention.
4 is a partially enlarged perspective view showing a state in which the vent hole of the airbag cushion is completely opened according to an embodiment of the present invention.
5 is a partially enlarged perspective view showing a state in which a vent hole of an airbag cushion is partially closed according to an embodiment of the present invention.
6 is a plan view showing a state in which the vent hole of the airbag cushion is completely opened according to another embodiment of the present invention.
7 is a plan view showing a state in which a vent hole of the airbag cushion is partially closed according to another embodiment of the present invention.
8A is a side view illustrating the interior of a vehicle having some inflated airbag cushions in accordance with one embodiment of the present invention.
8B is a cross-sectional view illustrating some of the inflated airbag cushions in accordance with one embodiment of the present invention.
9A is a side view showing the interior of a vehicle having a fully inflated airbag cushion in accordance with one embodiment of the present invention.
9B is a cross-sectional view of a fully inflated airbag cushion in accordance with an embodiment of the present invention.
10A is a side view illustrating the interior of a vehicle having a fully inflated airbag cushion in contact with a dummy in accordance with one embodiment of the present invention.
10B is a cross-sectional view illustrating a fully inflated airbag cushion in contact with a dummy in accordance with one embodiment of the present invention.
11A is a partially enlarged perspective view illustrating a vent adjusting apparatus having an expanded tube member according to another embodiment of the present invention.
11B is a partially enlarged perspective view illustrating a vent adjusting apparatus having a partially contracted tube member according to another embodiment of the present invention.
12A is a plan view of the vent adjusting apparatus shown in FIG.
12B is a plan view of the vent adjusting apparatus shown in FIG.
13A is a plan view showing a vent adjusting apparatus having an expanded tube member according to another embodiment of the present invention.
Figure 13B is a top view of a vent adjusting device having a partially retracted tube member in accordance with another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

1 is a side view illustrating the interior of a vehicle having an inflated airbag cushion in accordance with one embodiment of the present invention.

Referring to Fig. 1, an airbag apparatus 1 has at least one vent hole 11 formed therein. An inflator 3 for supplying gas into the airbag cushion 10, and a vent adjusting device 30 for adjusting the degree of opening according to the inflated state of the airbag cushion 10. In Fig. 1, the airbag cushion 10 is shown in a fully inflated state.

The vent hole 11 is formed at a position relatively close to the inflator 3 so as to maintain the open state at the initial deployment of the airbag cushion 10 to discharge the gas in the airbag cushion 10. [

The vent hole 11 is formed in the side surface 12 of the airbag cushion 10 so as to prevent the gas from being blocked by the structure of the vehicle, for example, the windshield 5, during the initial deployment of the airbag cushion.

The vent hole 11 is configured to be completely opened to reduce the internal pressure in the airbag cushion 10 at the initial deployment of the airbag cushion 10. In this case, it is possible to minimize the injury of the airbag deployment to an OUT of Position (OPP) passenger, for example, a child, a small adult passenger, or a general adult sitting in an abnormal state.

When the airbag cushion 10 is fully inflated, a part of the vent hole 11 is closed so that a relatively small amount of gas is discharged as compared with the initial deployment of the airbag cushion. Thus, it is possible to maintain an appropriate internal pressure for protection of adult passengers (female dummy (AF05) and male dummy (AM50)) which are relatively heavy compared to children and small adult passengers.

The female dummy AF05 corresponds to a small size passenger with a body size of 31 to 60 kg and the male dummy AM50 corresponds to a medium size passenger with a body size of 61 to 90 Kg.

The vent hole 11 is partially closed by the vent adjusting device 30. [ The vent adjusting device 30 includes a tube member 31, a cord member 33, and a pulling device 35. [

Figure 2 is a perspective view illustrating some of the inflated airbag cushions in accordance with one embodiment of the present invention, and Figure 3 is a cross-sectional side view of some inflated airbag cushions in accordance with one embodiment of the present invention.

Referring to Figs. 2 and 3, the vent adjusting device 30 includes a tube member 31, a cord member 33, and a pulling device 35. As shown in Fig.

The tube member 31 includes a substantially cylindrical member connected around the vent hole 11 and projecting outwardly of the airbag cushion 10. The proximal end portion 31a of the tube member 31 is connected to the periphery of the vent hole 11 through the sewing line S. [ The tube member 31 is configured to receive the cord member 33 in the circumferential direction of the tube member 31 therein.

The cord member 33 is connected to the distal end portion 31b side of the tube member 31. [

One end 33a of the cord member 33 is fixed at a predetermined position of the tube member 31 and the other end 33b of the cord member 33 is rotated at a predetermined angle in the circumferential direction of the tube member 31, (31). Thus, when the other end 33b of the cord member 33 is pulled, the distal end portion 31b of the tube member 31 is tightened to partially close the vent hole 11.

One end 33a of the cord member 33 is fixed at a predetermined position of the tube member 31 and the other end 33b of the cord member is fixed to the tube member 31 through the opening 31c of the tube member 31 31).

The cord member 33 may be formed of the same fabric material as the material of the airbag cushion 10. In another embodiment, the cord member 33 may be formed of a material having a predetermined flexibility such as a plastic material or a metallic material.

The pulling device 35 is connected to the cord member 33 at one end and connected to the front face 13 of the airbag cushion 10 at the other end thereof to provide a control tether 35 for pulling the cord member 33 in accordance with the deployment of the airbag cushion 10. [ (35a). In one embodiment, the control tether 35a and the cord member 33 may be formed as a single member. In this case, one end side of the cord member 33 is connected to the tube member 31, and the other end side of the cord member 33 can be connected to the front surface 13 of the airbag cushion 10.

In another embodiment, the pulling device 35 may comprise a separate mechanical device. For example, a mechanical device includes a gas generator that generates gas, a piston that moves by gas generated from the gas generator, and a cylinder that movably receives the piston. Here, the other end 33b of the cord member 33 may be configured to be connected to the piston and pulled. In such a case, a separate sensor for detecting the operating point of the gas generator may be employed. That is, the sensor can detect the fully inflated state of the airbag cushion and adjust the timing of tightening the tube member 31. [

The vent hole 11 according to one embodiment of the present invention is required to be partially closed when the airbag cushion 10 is fully inflated. The vent adjusting device 30 further includes a separate stopping device for limiting the withdrawal length of the cord member 33 such that the distal end 31b of the tubular member 31 is partially tightened.

The following describes this stopping device in detail.

4 is a partially enlarged perspective view showing a state in which the vent hole of the airbag cushion is completely opened according to an embodiment of the present invention, and FIG. 5 is a partially enlarged perspective view showing a state in which the vent hole of the airbag cushion is partially closed FIG.

In Fig. 4, the distal end portion 31b of the tube member 31 is in a non-tightened state, and the distal end portion 31b having the diameter D1 is shown. In this case, the vent hole 11 formed in the side surface 12 of the airbag cushion 10 is fully opened to relatively increase the amount of gas discharged from the airbag cushion 10. 5 shows a distal end portion 31b having a diameter D2 smaller than the diameter D1 as the distal end portion 31b of the tube member 31 is partially tightened. In this case, the vent hole 11 formed in the side surface 12 of the airbag cushion 10 is partially closed to relatively reduce the amount of gas discharged from the airbag cushion 10.

4 and 5, the stopping device 50 is provided in the cord member 33 and at least one opening 31c formed in the tube member 31 so that the other end of the cord member 33 can be drawn out The cord member 33 includes at least one cord stopper 51 which is caught in the opening 31c when the cord member 33 is pulled out through the opening 31c to limit the lead-out length of the cord member 33. [

The cord stopper 51 may comprise a knot or a sewing line formed on the cord member 33. In another embodiment, the cord stopper 51 may include a separate projecting member provided on the outer periphery of the cord member 33.

When the cord member 33 is formed into a fabric, a knot is formed on the cord member 33 or a plurality of sewing lines are formed on a certain portion of the cord member 33. The knot portion and the sewing line portion are formed to be relatively larger than the opening 31c. Thus, the knot portion or the sewing line portion is caught in the opening 31c to limit the length of the cord member 33 drawn through the opening 31c. Therefore, the amount of tightening of the distal end portion 31b of the tube member 31 is limited, and the tube member 31 is not completely tightened, so that a part of the vent hole 11 is closed.

The lead-out length of the cord member 33 can be adjusted, for example, in accordance with the withstand pressure of the required airbag cushion 10, which can be achieved by changing the position of the cord stopper 51. [

In another embodiment, when the cord stopper 51 is formed as a separate member, the cord stopper 51 may include a ring-shaped member that fits around the outer periphery of the cord member 33. [ When the cord member 33 is formed of a fabric material, at least one band member is wrapped around the cord member 33 separately, and then the band member is fixed to the cord member 33 through the sewing line so that the cord stopper 51 ) Can be formed.

The stopping member 50 is provided with an anti-slack member 55 for restricting the movement of the cord member 33 in the direction opposite to the drawing direction and preventing the distal end portion 31b of the tightened tube member 31 from loosening . When the distal end portion 31b is loosened, the vent hole 11 of the airbag cushion 10 is opened to a relatively large extent, so that the amount of gas discharged from the airbag cushion 10 is increased. In this case, the internal pressure of the airbag cushion 10 can not be appropriately maintained, and the passenger protection effect may be deteriorated.

The anti-slack member 55 is provided on the cord member 33 at a predetermined interval from the cord stopper 51 and is configured to be pulled out through the opening 31c of the tube member 31 when the cord member 33 is pulled out . The anti-slack member (55) is formed smaller than the cord stopper (51). The anti-slack member 55 may be formed directly on the cord member 33 like the cord stopper 51 or may be constituted by a separate member so as to fit on the outer periphery of the cord member 33. [ That is, the anti-slack member 55 may include a ring-shaped member that is fitted to the outer periphery of the cord member 33. When the cord member 33 is formed of a fabric material, the anti-slack member 55 can be formed by wrapping at least one band member on the outer periphery of the cord member 33 and then connecting the band member through a sewing line.

The opening 31c is formed in a slit shape so that when the cord member 33 is pulled out, the anti-slack member 55 passes through the opening 31c, and the cord member 33 comes in contact with the withdrawing direction of the cord member 33 And is caught on the periphery of the slit when pulled in the opposite direction. The cord member 33 is pulled out by a certain length through the opening 31c in a fully inflated state of the airbag cushion 10 to maintain a state where the distal end portion 31b of the tube member 31 is partially tightened. However, when the passenger (0, dummy) collides with the front face 13 of the airbag cushion 10 and the gas in the airbag cushion 10 is discharged through the vent hole 11, the cord member 33 is loosened, Can be moved in a direction opposite to the drawing direction of the member (33). When the cord member 33 is moved in the opposite direction as described above, the distal end portion 31b of the tube member 31 is loosened so that the vent hole 11 is not closed to a desired size, so that the airbag cushion 10 is maintained at a desired internal pressure The passenger O can not be protected.

The anti-slack member 55 is employed in order to solve the above-mentioned problems.

4 and 5 show a configuration in which a single code member 33 is annularly arranged. However, the present invention is not limited thereto, and a plurality of code members can be applied to the tube member. The following describes an example in which two cord members are applied to the tube member.

FIG. 6 is a plan view showing a state in which the vent hole of the airbag cushion according to another embodiment of the present invention is completely opened, and FIG. 7 is a view showing a state in which the vent hole of the airbag cushion according to another embodiment of the present invention is partially closed FIG.

Hereinafter, the vent adjusting device is assigned a number 70 and has a configuration similar to that of the vent adjusting device 50 described above. Therefore, the same reference numerals are used for the same constituent elements as those of the above-described vent adjusting apparatus 50, and redundant explanations are omitted.

Referring to Figs. 6 and 7, the vent adjusting device 70 includes two openings 71c and two cord members 73 formed in the tube member 71. As shown in Fig.

The two openings 71c can be disposed so as to face each other with respect to the central axis A of the tube member 71. [ The two cord members 73 can be arranged in a semicircular shape along the circumferential direction of the tube member 71. [ One end 73a of the cord member 73 is fixed to a predetermined position of the tube member 71 adjacent to the opening 71c and the other end 73b of the cord member 73 is fixed to the tube member 71 through the opening 71c. As shown in Fig.

The operation of the airbag constructed as described above will be described below.

FIG. 8A is a side view showing the interior of a vehicle having some inflated airbag cushions in accordance with one embodiment of the present invention, and FIG. 8B is a cross-sectional view illustrating some inflated airbag cushions in accordance with an embodiment of the present invention.

8A and 8B, in the event of a vehicle collision, gas is generated from the inflator 3, and the gas generated from the inflator 3 is supplied into the airbag cushion 10. At this time, the cord member 31 and the control tether 35a remain loose, and the distal end portion 31b of the tube member 31 is not tightened and remains loose. As a result, the vent hole 11 of the airbag cushion 10 is completely opened with the diameter D1 (see Fig. 4).

Thus, the gas in the airbag cushion 10 discharges a relatively large amount of gas through the vent hole 11 to reduce the internal pressure of the airbag cushion 10. [ In this case, injury to the airbag deployment for OPP passengers, children, and small adult passengers can be minimized.

FIG. 9A is a side view showing the interior of a vehicle having a fully inflated airbag according to one embodiment of the present invention, and FIG. 9B is a cross-sectional view illustrating a fully inflated airbag according to an embodiment of the present invention.

9A and 9B, the control tether 35a connected to the front surface 13 of the airbag cushion 10 is pulled while gas is continuously supplied from the inflator 3 into the airbag cushion 10. [ As a result, the other end of the cord member 33 is pulled out through the opening 31c of the tube member 31. [ The distal end portion 31b of the tube member 31 is contracted. At this time, the cord stopper 51 provided on the cord member 33 is caught by the opening 31c of the tube member 31 to limit the drawing length of the cord member 33. Thus, the distal end portion 31b of the tube member 31 is not tightened any more, and a part of the vent hole 11 is kept closed (see FIG. 5). In this state, the vent hole 11 has a relatively small diameter D2.

The withdrawal length of the cord member 33 is adjustable according to the physique of the target passenger to be protected.

The vent hole 11 is partially closed when the airbag cushion 10 is fully inflated so that a relatively small amount of gas is supplied to the airbag cushion 10 through the vent hole 11, (10). Thus, the internal pressure of the airbag cushion 10 is adjusted so as to smoothly receive and protect adult female passengers (AF05 piles) or adult male passengers (AM50 piles).

The inner pressure of the airbag cushion 10 can be appropriately adjusted according to the size of the passenger by appropriately adjusting the opening size of the vent hole 11 according to the deployed state of the airbag cushion 10 according to an embodiment of the present invention.

Figure 10a is a side view showing the interior of a vehicle having an inflated airbag cushion in contact with a dummy in accordance with an embodiment of the present invention and Figure 10b is a side view of a fully inflated airbag cushion in contact with a dummy, Fig.

10A and 10B, when the passenger (O, dummy) comes into contact with the front surface 13 of the airbag cushion 10 in a fully inflated state of the airbag cushion 10, 13 are pressed toward the rear of the airbag cushion 13. [

As a result, the control tether 35a and the cord member 33 are loosened and the cord member 33 moves in the direction opposite to the drawing direction by the gas pressure in the airbag cushion 10, Can be loosened. In this case, the vent hole 11 is returned to the relatively large diameter D1, and the airbag cushion 10 can not be maintained to have the desired internal pressure, so that the passenger protection effect may be deteriorated.

This problem is solved by the anti-slack member 55 of the present invention.

The anti-slack member 55 is disposed on the cord member 33 at a certain distance from the cord stopper 51 and is formed to have a smaller size than the opening 31c of the tube member 31, The anti-slack member 55 is easily drawn out through the opening 31c of the tube member 31. [

On the other hand, when the passenger O comes into contact with the front surface 13 of the airbag cushion 10 and the cord member 33 moves in the direction opposite to the drawing direction, the anti- 31c so as to prevent the code member 33 from moving in the reverse direction.

The opening 31c is formed in the form of a slit so that the anti-slack member 55 easily passes through the opening 31c when the cord member 33 is pulled out. However, when the distal end portion 31b of the tube member 31 contracts to some extent The anti-slack member 55 hangs around the opening 31c when the cord member 33 is pulled in the direction opposite to the drawing direction.

FIG. 11A is a partially enlarged perspective view showing a vent adjusting apparatus having an expanded tube member according to another embodiment of the present invention, and FIG. 11B is a sectional view of a vent adjusting apparatus having a partially contracted tube member according to another embodiment of the present invention 1 is a partially enlarged perspective view showing the apparatus.

Hereinafter, a vent adjusting device including the fixing portion 91 replacing the cord stopper 51 will be described. A vent control device having an 80th generation number is described below. Hereinafter, description of components similar to those of the above-described components will be omitted, and the description will be focused on the fixing unit 91. [

11A and 11B, the distal end portion 81b of the tube member 81 is placed in two positions at a predetermined gap G from the opening 81c of the tube member 81, And a gate 91 is formed. Both end sides 83a and 83b of the code member 83 are pulled out from the opening 81c. Both ends 83a and 83b of the cord member 83 drawn out from the opening 81c can be indirectly connected to the front surface of the airbag cushion 10 through the control tether 35a (see Fig. 3). In another embodiment, Both ends of the cord members 83a and 83b can be directly connected to the front surface 13 of the airbag cushion 10. [

The fixing portion 91 fixes the code member 83 and the tube member 81 disposed on the side of the distal end portion 81b of the tube member 81. [ Fixing portion 91 may be formed by sewing, bonding, tape, radio frequency welding, heat sealing, or any other suitable technique or combination of such techniques. In one embodiment, the fixing portion 91 may include a sewing line S1.

The fixing portion 91 defines the length at which the distal end portion 81b of the tube member 81 is contracted when the cord member 83 is pulled when the airbag cushion 10 is inflated. That is, the fixing portion 91 allows the portion A of the tube member 81 corresponding to the constant gap G to be contracted when the cord member 83 is pulled, 81b are prevented from being completely closed.

FIG. 12A is a plan view of the vent adjusting apparatus shown in FIG. 11A, and FIG. 12B is a plan view of the vent adjusting apparatus shown in FIG.

12A, when the airbag cushion 10 is initially deployed, a portion A of the tube member 81 corresponding to the opening 81c and the fixing portion 91 by the loose cord member 83 is tightened Maintaining the unfolded state, the tube member 81 is completely opened to the diameter D1.

12B, when the airbag cushion 10 is full, the cord member 83 is pulled toward the front surface 13 of the airbag cushion 10 and the opening 81c and the fixing portion (not shown) of the tube member 81 91 are tightened. At this time, both ends 83a and 83b of the cord member 83 are pulled, and the two portions A between the opening 81c and the fixing portion 91 of the tube member 81 are contracted toward each other. As a result, the distal end portion 81b of the tube member 81 has a diameter D2 that is closed by the length in which the portion A between the opening 81c and the fixing portion 91 of the tube member 81 is contracted . Thus, the vent hole 11 of the airbag cushion 10 is partially closed so that a relatively small amount of gas is discharged from the airbag cushion 10.

FIG. 13A is a plan view showing a vent adjusting apparatus having an expanded tube member according to another embodiment of the present invention, and FIG. 13B is a cross sectional view of a vent adjusting apparatus having a partially contracted tube member according to another embodiment of the present invention Fig.

In the above description, it is described that the fixing portion 91 is provided at two positions. However, the present invention is not limited thereto, and the fixing portion 91 may be provided on one side of the opening 81c.

13A and 13B, one end 83a side of the code member 83 is fixedly connected to one side of the tube member 81 adjacent to the opening 81c, and the other end 83b side of the code member 83 And is drawn out through the opening 81c. The fixing portion 91 may be provided at a position spaced apart from the opening 81c by a predetermined distance G in the clockwise or counterclockwise direction.

The other end 83b of the cord member 83 is pulled when the airbag cushion 10 is inflated so that the portion A between the opening 81c and the fixing portion 91 of the tube member 81 is contracted do. Therefore, the distal end portion 81b of the tube member 81 is partially closed, and a part of the vent hole 11 is closed to relatively reduce the gas exhausted from the vent hole 11.

The passenger seat airbag has been described in the above description. The airbag as described above may be employed in various airbag devices such as an airbag device mounted in a steering wheel.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

10: airbag cushion 11: vent hole
30, 70, 80: vent adjusting device 31, 71, 81:
31c, 71c, 81c: openings 33, 73, 83:
35: pulling device 50: stopping device
51: stopper member 55: anti-slack member

Claims (9)

An airbag cushion fully opened upon initial deployment of the airbag cushion and having a vent hole partially closed when the airbag cushion is full; And
And a vent adjusting device for adjusting the open / closed state of the vent hole,
Wherein the vent adjusting device includes a tubular member having a proximal end fixed around the vent hole and a proximal end protruding from the airbag cushion when the airbag cushion is initially deployed;
A cord member movably connected to the tube member in a circumferential direction of the tube member to partially tighten the distal end portion of the tube member when the airbag cushion is full;
A pulling device for pulling the cord member when the airbag cushion is full;
A stopping device for restricting movement of the cord member to define a degree of closing of the distal end of the tube member; And
And an anti-slack member for preventing the cord member from being pulled in a direction opposite to the drawing direction of the cord member, thereby preventing a loose end of the tube member tightened by the cord member. The stapling apparatus according to claim 1, wherein the stopping device comprises at least one opening formed in the tube member so that at least one end of the cord member can be drawn out; And
And at least one cord stopper provided on the cord member and hung on the opening when the cord member is pulled out through the opening to limit a pull-out length of the cord member. The stapling apparatus according to claim 1, wherein the stopping device comprises at least one opening formed in the tube member so that at least one end of the cord member can be drawn out; And
And at least one fixing portion for fixing the cord member and the tube member at a position spaced apart from the opening by a predetermined distance in a state that the distal end portion of the tube member is completely opened. delete The vehicular airbag according to claim 3, wherein the anti-slack member is provided on the cord member at a certain distance from the cord stopper or the fixing portion, and is capable of being pulled out through the opening of the tube member when the cord member is pulled out. The cord member according to claim 5, wherein the opening is formed in a slit shape so that, when the cord member is pulled out, the anti-slack member passes through the opening, and when the cord member is pulled in a direction opposite to the drawing direction of the cord member Car airbags in the periphery. 6. The apparatus of claim 5, wherein the tube member comprises two openings facing each other, disposed in a semicircular shape on the tube member, disposed to face each other about a central axis of the tube member, A vehicle airbag comprising two cord members drawn out. The vehicular airbag according to claim 3, wherein both ends of the cord member are drawn out through the opening, and the fixing portion is formed at two positions spaced apart from the opening by a completely opened state of the distal end of the tube member. The vehicle airbag according to claim 1, wherein the pulling device includes a connecting member connected to a front side of the airbag cushion, one side of which is connected to the lead-out end of the cord member and the other side of which contacts the passenger.

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