KR101294985B1 - Cushion of air-bag device - Google Patents

Abstract

The present invention relates to a cushion of an airbag device, comprising: a cushion body deployed by a high-pressure gas in a vehicle crash and having a gas inlet formed at one side of a rear surface thereof; A first tether disposed inside the cushion body and connected at both ends to an upper portion of the gas inlet and an upper portion of the front surface of the cushion body; And a second tether connected to the first tether and an intermediate part and connected at both ends to the lower part of the gas inlet and the lower part of the front surface of the cushion body, and the deployment shape of the cushion body is defined by the first and second tethers. In addition to being controlled, the flow direction of the gas introduced into the cushion body by the first and second tethers is changed to the left and right to improve the cushion development performance, and the initial forward deployment of the cushion body is suppressed to Since injury reduction deployment is implemented, there is an advantage that the performance of the airbag device against abnormal seating conditions is ensured.

Airbag device, cushion, cushion body, gas inlet, first tether, second tether, sewing

Description

Cushion of airbag device {CUSHION OF AIR-BAG DEVICE}

1 is a cross-sectional view showing an airbag device in which a cushion of the prior art is stored;

Figure 2 is a perspective view of the deployment shape of the cushion according to the prior art,

3 is a perspective view showing a cushion of the airbag device according to an embodiment of the present invention,

4 is a plan view showing the first tether of FIG.

5 is a plan view showing the second tether of FIG.

6 is a view showing an initial state of deployment of the cushion according to an embodiment of the present invention;

7 is a view showing the end of the cushion deployment state according to an embodiment of the present invention,

8 is a side sectional view showing a cushion of an airbag device according to another embodiment of the present invention;

9 is a plan view showing the tether of FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

50: cushion 52: cushion body

53: gas inlet 54: first tether

55: first reinforcement 56: second tether

57: second reinforcement unit 60: sewing unit

62: space 70: cushion

72: cushion body 73: gas inlet

74: reinforcement portion 76: first tether portion

78: second tether portion 80: sewing portion

82: space part

The present invention relates to a cushion of an airbag device that absorbs a passenger's shock in the event of a vehicle crash, and in particular, an airbag device that can reduce the manufacturing cost and manufacturing process while ensuring the performance of the airbag device against an abnormal seating state of a passenger. It's about the cushion.

In general, the airbag device is installed inside the vehicle and is installed for the purpose of protecting the occupant seated in the driver's seat or the passenger seat from impact in the event of a crash.

The airbag device includes a driver's seat airbag device, a passenger seat airbag device, a side airbag device, and the like. The driver's seat airbag device is mounted on a handle to protect the driver's front side of the driver's seat, and the passenger seat airbag device is installed on the instrument panel on the front passenger seat. The passenger's front of the passenger seat is protected, and the side airbag device is installed on the side roof rail or the side of the seat to protect the passenger's side.

1 is a cross-sectional view showing an airbag device in which a cushion of the prior art is stored, and FIG. 2 is a perspective view showing a deployment shape of a cushion according to the prior art.

As shown in FIG. 1, a conventional passenger seat airbag device includes an airbag housing 2 having a front surface fixed to a cowl cross member of a vehicle, and a high pressure in a vehicle crash accident. A retainer having an inflator 4 for ejecting gas and a plurality of holes 6A mounted inside the airbag housing 2 so as to be located in front of the inflator 4 and allowing gas of the inflator 4 to pass therethrough. (6) and a cushion (8) which is fixed to the inside of the airbag housing (2) by the retainer (6) and is deployed toward the occupant of the passenger seat by the gas passing through the hole (6A) of the retainer (6). And an airbag door 10 mounted on the opened front surface of the airbag housing 2 in a shape broken by the deployment pressure of the cushion 8 and disposed on the instrument panel of the vehicle.

On the outer circumferential side of the inflator 4, a plurality of gas ejection openings for ejecting gas in a collision event of the vehicle are formed along the circumference.

The airbag door 10 is a plate-shaped injection molded product mounted to the instrument panel facing the passenger seat, and the developing pressure of the cushion 8 so that the cushion 8 is deployed to the occupant of the passenger seat when the cushion 8 is deployed. The breaking line 10A which is broken by this is formed.

The cushion 8 is accommodated in a state of being folded several times inside the airbag housing 2, and a rear surface is disposed between the retainer 6 and the airbag housing 2, and the rear surface is The gas inlet 12 is provided with an inlet hole 12A through which gas is introduced in communication with the hole 6A of the retainer 6.

Here, the inside of the cushion 8 is provided with a tether (TETHER) 14 for controlling the development shape of the cushion 8, one end of the tether 14 is formed with the gas inlet 12 It is connected to the rear of the cushion 8, the other end of the tether 14 is connected to the front of the cushion (8).

In addition, left and right flaps (FLAP) 16 and 18 that restrain the initial forward development are disposed on the outer side of the cushion 8 so as to overlap each other, and an incision line on the front side of the outer side of the left and right flaps 16 and 18. It is completely wrapped by the formed cushion wrap 20.

The cushion 8, the tether 14, the left and right flaps 16 and 18, the cushion wrap 20 is formed of a fabric material is connected to each other by a sewing method.

Meanwhile, one end of the left and right flaps 16 and 18 is fixed to the left and right sides of the retainer 6 together with the cushion 8, and the other ends of the left and right flaps 16 and 18 overlap each other. It is folded several times.

Therefore, the left and right flaps 16 and 18 prevent the initial forward deployment of the cushion 8 by the frictional force of the other end when the cushion 8 is deployed, so that the occupant sits in the passenger seat in an abnormal posture. In the case of (OOP, OUT-OF-POSITION) state, the problem that the occupant is injured by the initial development pressure of the cushion 8 is eliminated, and the safety of the airbag device 1 is secured.

In particular, in recent years, the performance regulations of airbag devices have been strengthened to protect passengers in abnormal seating conditions.If the performance requirements are not satisfied, the airbag device in abnormal seating conditions is disadvantageous due to disadvantages in business. ) Is very important.

However, the cushion of the airbag device according to the prior art is implemented by the lower left and right flaps (16, 18) to reduce the injury injury (LRD, LOW RISK DEPLOYMENT) of the cushion is minimized injuries to occupants in an abnormal seating (OOP) state However, since the frictional resistance is not constant according to the quality of folding the left and right flaps 16 and 18, there is a problem that a large performance deviation of the airbag device 1 occurs.

In addition, when the left and right flaps 16 and 18 are added to the cushion 8, the structure of the cushion 8 is very complicated, and the number of parts of the airbag device 1 increases to increase the cost. The manufacturing process of the airbag apparatus 1 increases, and there exists a problem that manufacturing time increases.

In particular, the left and right flaps 16 and 18 are made of specially coated fabrics that increase friction, thereby improving performance against abnormal seating conditions of the airbag device 1. There is a problem that the price competitiveness of the airbag device 1 is lowered due to the increase in the unit price.

As described above, when the frictional force of the left and right flaps 16 and 18 is increased, the performance of the abnormal seating state of the airbag device 1 is improved, but the frictional force of the left and right flaps 16 and 18 is increased to a predetermined level or more. When the cushion 8 is deployed, the left and right flaps 16 and 18 are ruptured and scattered, so that the design and folding of the left and right flaps 16 and 18 must be performed very precisely and accurately.

Of course, unlike the above, the performance of the abnormally seated state of the airbag apparatus 1 may be improved by lowering the gas injection pressure of the inflator 4 or releasing the gas introduced into the cushion 8 to the outside at the beginning of deployment. Although it is also possible to ensure, in this case, there exists a problem that the performance of the airbag apparatus 1 with respect to a normal seating state falls.

The present invention was created in order to solve the above problems, the front deployment of the cushion is suppressed by the tether during the initial deployment of the cushion and the left and right deployment of the cushion proceeds, thereby ensuring the performance of the airbag device against abnormal seating state Rather, the object of the present invention is to provide a cushion of an airbag device in which the cushion is formed in a simple structure and can be easily manufactured.

In addition, another object of the present invention is to secure the performance of the abnormal seating state of the airbag device by the tether in the cushion, it is possible to omit the parts such as the conventional flap to reduce the number of parts and cost of the cushion, the production of the cushion It is to provide a cushion of the airbag device that can reduce the number of processes to reduce the production time.

In addition, another object of the present invention is to ensure that the performance of the airbag device against the abnormal seating state by the tether in the cushion in a certain quality, the structure of the tether is appropriately changed according to the type and installation environment of the airbag device to the abnormal seating state The present invention provides a cushion of an airbag device in which the performance of the airbag device may be optimized.

Cushion of the airbag apparatus according to an embodiment of the present invention for realizing the above object, the cushion body is deployed by the high-pressure gas during the collision of the vehicle and a gas inlet is formed on one side of the rear; A first tether disposed inside the cushion body and connected at both ends to an upper portion of the gas inlet and an upper portion of the front surface of the cushion body; The first tether and the intermediate portion is connected, characterized in that it comprises a second tether both ends connected to the lower portion of the front of the lower portion of the gas inlet and the cushion body.

One end of the first tether and the second tether is provided with reinforcement parts mounted on the inner surface of the gas inlet.

An intermediate portion of the first tether and the second tether is connected by a sewing method.

In addition, the cushion of the airbag device according to another embodiment of the present invention, the cushion body having a gas inlet is formed in the front of the inlet hole formed on the rear side by the high-pressure gas in the event of a collision of the vehicle; A reinforcement part mounted on an inner surface of the gas inlet part of the cushion body; A first tether portion having one end integrally formed on an upper portion of the reinforcement portion and the other end connected to an upper portion of the front surface of the cushioning body; The first tether portion and the intermediate portion is connected, one end is integrally formed in the lower portion of the reinforcement portion, characterized in that it comprises a second tether portion connected to the other end of the lower front of the cushion body.

Intermediate portions of the first tether portion and the second tether portion are connected by a sewing method.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a perspective view showing a cushion of the airbag apparatus according to an embodiment of the present invention, Figures 4 and 5 are a plan view showing the first tether and the second tether of FIG.

For reference, the same reference numerals are given to the same or similar components as those of the conventional configuration, and detailed description thereof will be omitted.

3 to 5, the cushion of the airbag device according to an embodiment of the present invention is deployed forward by the gas of the inflator 4 in the event of a collision of the vehicle and the airbag housing 2 by the retainer 6 Cushion body 52 is formed on the rear side of the gas inlet 53 is fixed to the inside of the, and disposed inside the cushion body 52, the upper portion of the gas inlet 53 and the cushion body 52 A first tether 54 connected at both ends to an upper portion of the front surface, and an intermediate portion of the first tether 54 is connected to both ends of the lower portion of the gas inlet 53 and a lower portion of the front surface of the cushion body 52. It comprises a second tether 56, each connected.

Here, the cushion body 52 is accommodated in a state of being folded (folded) several times in the airbag housing (2), the retainer 6 is placed in close contact with the inner surface of the gas inlet 53 It is fastened and fixed to the airbag housing 2 together with the retainer 6, and vent holes 52A are formed at both sides.

The gas inlet 53 is disposed to face the gas outlet of the inflator 4 so that the gas of the inflator 4 can flow therein, and the inlet hole in the center communicates with the hole 6A of the retainer 6. 53A is formed.

The vent hole 52A not only prevents the internal pressure of the cushion body 52 from being excessively raised above a set value by the gas of the inflator 4 when the cushion 50 is deployed, but also the cushion body 52. ) Is smoothly relaxed by the passenger's shock to improve the shock absorbing performance.

The first tether 54 is a strip-shaped member having one end connected to the upper portion of the gas inlet 53 and the other end connected to the upper portion of the front surface of the cushion body 52, and the gas at one end of the first tether 54. The first reinforcement part 55 mounted on the inner surface of the gas inlet part 53 is integrally formed to reinforce the strength and the heat resistance of the inlet part 53.

The first reinforcement part 55 is preferably formed in the same shape as the gas inlet part 53.

In addition, the second tether 56 is a strip-shaped member having one end connected to the lower portion of the gas inlet 53 and the other end connected to the lower portion of the front surface of the cushion body 52. A second reinforcement 57 is integrally formed on the inner surface of the gas inlet 53 so as to reinforce the strength and heat resistance of the inlet 53.

The second reinforcement part 57 is preferably formed in the same shape as the gas inlet part 53.

The cushion body 52, the first tether 54 and the second tether 56 are formed of a fabric material and are interconnected by a sewing method.

That is, the first reinforcement part 55 and the second reinforcement part 57 are sewn on the inner surface of the gas inlet part 53 overlapping each other, and the first tether 54 and the second tether 56 are sewn together. One end of) is sewn on the front and top of the cushion body 52, respectively.

The retainer 6 is fixed to the overlapping inner surface of the first reinforcement part 55 and the second reinforcement part 57.

On the other hand, in the middle portion of the first tether 54 and the second tether 56, a sewing unit 60 connected to each other by a sewing method is formed.

Accordingly, a space 62 having both sides opened by the first tether 54 and the second tether 56 is formed at the rear of the sewing unit 60 to cushion the body through the gas inlet 53. The gas flowing into the 52 is guided in the left and right directions.

The sewing unit 60 is sewn in the left and right direction in the middle portion of the first tether 54 and the second tether 56, the front and rear of the first tether 54 and the second tether 56. It is also possible to form a plurality in the direction.

In this embodiment, the sewing unit 60 is formed long in the left and right directions, it will be described by limiting that the number is formed in the front and rear direction. That is, the first tether 54 and the second tether 56 are disposed in an 'X' shape inside the cushion body 52 with the sewing unit 60 as the center.

Looking at the operation and effect on the cushion of the airbag device according to an embodiment of the present invention configured as described above are as follows.

6 and 7 are diagrams showing the initial and final deployment state of the cushion in accordance with an embodiment of the present invention, respectively.

First, as shown in FIG. 6, when gas is ejected from the inflator 4 during a collision of the vehicle, the gas of the inflator 4 is discharged into the inlet hole 53A of the cushion body 52 and the hole of the retainer 6. 6A) flows into the cushion body 52.

The high pressure gas introduced into the cushion body 52 is prevented from flowing forward by the space portion 62 of the first tether 54 and the second tether 56, and then the space portion ( The flow direction is changed from side to side along the inner surface of 62).

When the pressure of the gas is applied to the inner surface of the space 62 in this way, the space 62 is expanded in the direction (A) to expand outward by the pressure of the gas, the space 62 is expanded As the front portion of the first tether 54 and the second tether 56 disposed in front of the sewing unit 60 is stressed in the direction (B) is pulled backward.

Therefore, in the initial stage of deployment of the cushion 50, the front deployment of the cushioning body 52 is suppressed by the first tether 54 and the second tether 56, and the first tether 54 and the second are suppressed. The flow direction of the gas is changed in the left and right directions by the space 62 of the tether 56 so that the cushioning body 52 is developed in the left and right directions.

That is, since the forward deployment of the cushioning body 52 is suppressed, the performance of the airbag device 1 is sufficiently secured against the abnormal seating state of the occupant, and the left and right deployment of the cushioning body 52 proceeds first, so that the cushion 50 ) Deployment performance is improved.

Meanwhile, as shown in FIG. 7, when the gas is ejected from the inflator 4 when the collision of the vehicle is completed, the gas of the inflator 4 does not flow into the cushion body 52, so that the first tether 54 ) And the gas pressure applied to the space portion 62 of the second tether 56 are removed, and the cushioning body 52 is in full bloom in the front-rear direction to the first tether 54 and the second tether 56. Stress is applied.

That is, the space 62 is relaxed in the direction (C) to return to the initial state, and as the space 62 is relaxed, the first tether 54 disposed ahead of the sewing unit 60 and The front part of the 2nd tether 56 is stressed in the direction (D) which spreads forward by the development force of the cushion main body 52. FIG.

Therefore, at the end of the deployment of the cushion 50, the size of the space portion 62 of the first tether 54 and the second tether 56 is reduced, and the first tether 54 and the second tether 56 are reduced. Cushion body 52 is developed forward by the length of).

As described above, the cushioning body 52 is fully developed by the first tether 54 and the second tether 56.

8 is a side cross-sectional view showing a cushion of the airbag device according to another embodiment of the present invention, Figure 9 is a plan view of the tether of Figure 8 is shown.

For reference, the same reference numerals are given to the same or similar components as those of the above-described embodiment, and detailed description thereof will be omitted.

As shown in FIGS. 8 and 9, the cushion of the airbag device according to another embodiment of the present invention is deployed forward by the gas of the inflator 4 and the airbag housing 2 by the retainer 6 as the vehicle crashes. Cushion body 72 is fixed to the gas inlet portion 73 is formed on the back, the reinforcement portion 74 is mounted to the inner surface of the gas inlet portion 73 of the cushion body 72, and the reinforcement portion ( One end is integrally formed on the upper portion of the 74 and the other end is connected to the first upper portion of the front surface of the cushion body 72, and the first tether portion 76 and the intermediate portion are connected to each other, and the reinforcement portion is connected. One end is integrally formed at the lower portion of the 74 and the second tether portion 78 is connected to the other end of the front lower portion of the cushion body 72.

Here, the reinforcing portion 74 is a member of the fabric material to reinforce the strength and heat resistance of the gas inlet portion 73, is formed in the same shape as the gas inlet portion 73 of the gas inlet portion 73 It is connected to the inner side by a sewing method.

The retainer 6 is fixed to the inner surface of the reinforcement portion 74.

In addition, the first tether portion 76 and the second tether portion 78 are members of a fabric material having one end integrally connected to an upper portion and a lower portion of the reinforcement portion 74. As formed in a shape corresponding to each other, the middle portion is connected to each other by a sewing method is a sewing unit 80 is formed.

Accordingly, a space 82 having both sides opened by the first tether portion 76 and the second tether portion 78 is formed at the rear of the sewing portion 80 through the gas inflow portion 73. The gas flowing into the cushion body 72 is guided in the left and right directions.

The sewing unit 80 is sewn long in the left and right directions in the middle of the first tether portion 76 and the second tether portion 78, the first tether portion 76 and the second tether portion ( It is also possible to form a plurality in the front-rear direction of 78).

When the reinforcement portion 74, the first tether portion 76 and the second tether portion 78 are integrally formed as described above, the number of parts of the cushion 70 is reduced compared to the above-described embodiment and the cushion 70 This makes the work of making things easier.

Meanwhile, in the present embodiment, except for the reinforcement part 74, the first tether part 76, and the second tether part 78, the other configuration is the same as that of the above-described embodiment. Detailed description will be omitted.

As mentioned above, although the Example of the cushion of the airbag apparatus which concerns on this invention was demonstrated with reference to the illustrated figure, this invention is not limited by the said Example and drawing, By the person skilled in the art within the technical idea range of the invention. Of course, various modifications are possible.

Of course, the first and second tethers or the first and second tether portions may be connected to each other in a structure that crosses each other.

That is, the first tether or the first tether portion is disposed at both ends of the upper portion of the gas inlet and the front of the cushion body, respectively, and the second tether and the second tether portion are both ends of the lower portion of the gas inlet and the upper surface of the cushion body. Each of them is disposed, and the intermediate portion of the first and second tethers or the intermediate portion of the first and second tare portions are disposed to penetrate each other.

In the cushion of the airbag apparatus according to the present invention configured as described above, the first tether connected to both ends of the upper portion of the gas inlet and the front surface of the cushion body is disposed inside the cushion body, and the lower portion of the gas inlet and the front of the cushion body. Since the second tether having both ends connected to the lower portion is arranged such that the first tether and the intermediate part are connected to each other, the development shape of the cushioning body is controlled not only by the first and second tethers, but also by the first and second tethers. There is an advantage that the flow direction of the gas introduced into the body is changed left and right, and the initial forward development of the cushion body is suppressed.

In addition, when the flow of gas introduced into the cushioning body by the first and second tethers is changed in the horizontal direction, since the initial development of the cushioning body proceeds in the horizontal direction, the cushioning body is first developed from side to side. There is an advantage that the deployment performance of the cushion is improved in the next forward development.

In addition, if the forward development of the cushioning body is suppressed by the first and second tethers during the initial deployment of the cushioning body as described above, since the injury reduction deployment (LRD, LOW RISK DEPLOYMENT) of the cushion is implemented, the sudden initial stage of the cushioning is implemented. Injury of the occupant due to deployment is minimized, and the performance of the airbag apparatus against the abnormal seating state of the occupant is secured.

In addition, since the performance for the abnormal seating state of the airbag device is secured by the first and second tethers, parts such as a conventional flap are omitted, so that the structure of the cushion is simply formed as a whole, and the number of parts of the cushion is reduced to reduce the cost. It is reduced, and the manufacturing process of the cushion is reduced and the workability is improved during manufacturing, there is an advantage that the manufacturing time is shortened.

In addition, since the first and second tethers can be formed to a certain quality inside the cushioning body, the variation in the injury reduction and deployment of the cushion is reduced, so that the performance of an abnormal seating state of the airbag device is constantly secured. There is an advantage that the performance dispersion of the airbag apparatus is realized by reducing the quality spread of the airbag device.

In addition, there is an advantage that the performance of the cushion deployment performance and the abnormal seating state is optimized by a simple design change that changes the structure of the first and second tethers according to the type and installation environment of the airbag device.

Claims (5)

A cushion body formed at a rear side of the gas inlet fixed to the inside of the airbag housing; A first tether disposed inside the cushion body and having one end connected to an upper portion of the gas inlet and the other end connected to an upper portion of the front surface of the cushion body; The second tether disposed inside the cushion body, one end is connected to the lower portion of the gas inlet, and the other end is connected to the front lower portion of the cushion body. A sewing part in which a middle portion of the first and second tethers is sewn; And a space part formed between the sewing part and the gas inlet part by the first tether and the second tether, and having both sides opened to guide the gas introduced from the gas inlet part to the front of the cushion body. Cushion of the airbag device. The method of claim 1, The sewing unit is sewn long in the left and right direction in the middle portion of the first tether and the second tether, a plurality of cushions of the airbag device is formed in the front and rear directions of the first and second tether. The method of claim 1, The first and second tethers are cushions of the airbag apparatus disposed in an 'X' shape inside the cushion body around the sewing unit. delete delete

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