KR101075427B1 - Side air bag cushion and production method thereof - Google Patents

Abstract

The present invention relates to a side airbag cushion that can safely protect the thorax and buttocks of the occupant and a method of manufacturing the same, an inlet for receiving an inflation gas generated from the gas generating unit, a chamber in which the inflating gas is injected through the inlet And a tether attached longitudinally to the inside of the chamber, an inner plate and an outer plate of the chamber, and a sewing unit in which the tether is sewn, and the chamber is provided in one configuration.

By using the above-described side airbag cushion and its manufacturing method, the side airbag cushion formed by one chamber is instantaneously deployed to protect the thorax and the buttocks of the occupant safely, and the deployment speed of the side airbag cushion can be increased.

Side airbag, cushion, tether, sewing, deployment thickness

Description

Side airbag cushion and its manufacturing method {SIDE AIR BAG CUSHION AND PRODUCTION METHOD THEREOF}

The present invention relates to a side airbag cushion and a method for manufacturing the same, and more particularly, to a side airbag and a method for manufacturing the same to protect the waist of the occupant in the event of a side collision of the vehicle.

In general, an airbag device of a vehicle injects an inflation gas into the cushion in an instant in case of an emergency such as a sudden deceleration or a car crash accident, and the cushion expands at a high speed so that the occupant may have It is a safety device that protects against direct collisions.

In particular, side airbag devices have been developed to protect occupants against side collisions as well as frontal collisions. The side airbag device is mounted on one side of the seat or the pillar of the side of the vehicle, and protects the chest and the head or the chest and buttocks of the driver and the passenger mainly depending on the structure of the airbag cushion.

In the present specification, to protect the thorax and head of the occupant, the airbag that is deployed downward and forward and rearward from the pillar of the vehicle inner side is defined as a curtain airbag, and the side airbag is installed in the seat so that the thorax and the buttocks of the occupant may be Use the airbag to protect it.

An example of a side airbag cushion of such a vehicle is Korean Patent Registration No. 10-0655992 (registered on December 04, 2006) and Korean Patent Application Publication No. 10-2005-0076036 (published on July 26, 2005, hereinafter referred to as 'prior art' And the like.

1 is a block diagram of the side airbag cushion for protecting the chest and hip according to the prior art.

As shown in Figure 1, the side airbag cushion according to the prior art is a gas generator (Inflator) (6) for generating the expansion gas on one side portion is coupled to each other by the stitching 5, etc. An inner pocket for guiding the expanded gas generated from the gas generator 6 into the lower plain weave portion 3 through the injection tube 8 in a direction opposite to the gas generator 6. The upper part 7 is provided, and the upper flat part 2 connected to the lower flat part 3 is provided on the upper part of the lower flat part 3 by the diaphragm 4 in which a plurality of vents 4a are perforated. have.

Here, the injection pipe 8 is the inner pocket portion 7 and the lower flat so that the expansion gas supplied to the inner pocket portion 7 does not flow into the upper plain weave portion 2 but preferentially flows into the lower plain weave portion 3. It is provided between the straight parts 3.

The side airbag cushion 1 for protecting the chest and the buttocks according to the prior art having such a configuration supplies the expanded gas generated from the gas generator 6 to the inner pocket 7 and then through the injection tube 8. The lower plain weave 3 is introduced into the lower plain weave 3 to preferentially inflate.

Then, the inflation gas is introduced into the upper plain weave portion 2 through the vent 4a of the diaphragm 4, thereby expanding the upper plain weave portion 2 to protect the chest and the buttocks of the driver and the occupant in the event of a vehicle crash.

However, the side airbag cushion according to the prior art is composed of two chambers of the upper plain weave portion 2 and the lower plain weave portion 3.

As such, when two chambers are used, the total volume of the side airbag cushion 1, in particular the deployment thickness, becomes larger as each chamber is inflated into a sphere. For this reason, when two chambers are unfolded with an excessively larger deployment thickness than the space between the door and the occupant, a punch out force is applied to the chest and the buttocks of the occupant.

In addition, the side airbag cushion (1) according to the prior art is the lower flat weave 3 and the upper flat weave (2) through the inflated gas generated in the gas generator (6) through the inner pocket 7 and the injection tube (8) ) Sequentially.

Accordingly, the side airbag cushion 1 according to the prior art may cause a safety accident that fails to protect the thorax and buttocks of the occupant at an appropriate time due to the delay time of supplying the inflation gas to the lower and upper plain weaves 3 and 2. There was a danger.

Therefore, the side airbag cushion according to the prior art has a problem that causes the injury of the occupant due to the safety accident.

The present invention is to solve the above problems, an object of the present invention is to provide a side airbag cushion and a method for manufacturing the same that can safely protect the thorax and buttocks of the occupant.

Another object of the present invention is to provide a side airbag cushion and a method of manufacturing the same that can prevent a safety accident by blocking the punch out force applied to the occupant by adjusting the deployment thickness when the side airbag cushion is deployed.

Still another object of the present invention is to provide a side airbag cushion and a method for manufacturing the same, which can prevent damage by improving durability of the side airbag cushion.

Still another object of the present invention is to provide a side airbag cushion and a method of manufacturing the same, which can improve the deployment speed of the side airbag cushion.

According to a feature of the present invention for achieving the object as described above, the present invention is an injection port for injecting the expansion gas generated from the gas generator, a chamber in which the expansion gas is injected and deployed through the injection port, the interior of the chamber Tether is attached in the longitudinal direction and the inner and outer plates of the chamber and the sewing portion sewing the tether, characterized in that the chamber consists of one.

The sewing unit is characterized in that it comprises at least two or more sewing lines formed alternately on the inner plate and the outer plate.

The sewing line is made of three to five, characterized in that formed in the inner plate and the outer plate sequentially.

The sewing line is characterized in that formed in the width direction of the tether.

The sewing line is characterized in that formed in the interior of the tether.

The sewing line is characterized in that it is formed to extend longer than the width of the tether.

The sewing line is formed in the inner plate and the outer plate sequentially in a plurality of rows along the width direction of the tether.

The width of the tether is characterized in that it can be changed according to the deployment thickness of the chamber.

According to another feature of the invention, the present invention includes the step of attaching the tether in the longitudinal direction inside the chamber and sewing the alternating inner and outer plates of the tether and the chamber to form at least two seams, The tether is bent sequentially along the seam by expansion gas injected into the chamber when a side collision occurs.

As described above, the present invention can securely protect the thorax and buttocks of the occupant by instantaneously deploying the side airbag cushion formed of one chamber. Accordingly, the present invention does not need to deploy a plurality of chambers sequentially, thereby increasing the deployment speed of the side airbag cushion.

And the present invention is installed on the inside of the chamber in the longitudinal direction of the tether, the sewing machine alternately sewn on the tether and the inner and outer shells to adjust the deployment thickness during deployment of the side airbag cushion punch applied to the thorax and hip of the occupant By removing the out force, a safety accident can be prevented.

In addition, the present invention can adjust the deployment height of the side airbag cushion in accordance with the shape, position and number of the sewing line, there is an effect that can prevent damage by improving the durability by dispersing the expansion force.

Hereinafter, a side airbag cushion and a manufacturing method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing the configuration of the side airbag device according to the first embodiment of the present invention, Figure 3 is a front sectional view of the side airbag cushion shown in Figure 2, Figure 4 is a line AA 'of Figure 3 Side view.

As shown in FIG. 2, the side airbag device according to the present invention includes a gas generator 20 generating and inflating an inflation gas, and a side airbag cushion inflated by the inflation gas injected from the gas generator 20 ( Hereafter, abbreviated as 'cushion' 10, a detection unit (not shown) for detecting a side collision of the vehicle and when the side collision of the vehicle occurs, the cushion 10 according to the impact strength detected from the detection unit It comprises a control unit (not shown) for controlling to operate the gas generator 20 by determining whether the operation of the.

The side airbag cushion 10 according to the present invention includes an injection port 110 receiving the expansion gas from the gas generator 20, a chamber 120 expanded by the injected expansion gas, and an inside of the chamber 120. Tether 130 attached to the longitudinal direction and the inner plate 121 and outer plate 122 and the tether 130 of the chamber 120 includes a sewing portion 140 is sewn.

The chamber 120 is expanded in front of the in-vehicle seat and deployed between the vehicle door and the occupant so as to protect the chest and buttocks of the occupant in the event of a side impact.

To this end, the gas generating unit 20 is preferably formed in the center of the left end of the driver's seat and the center of the right end of the passenger seat.

Hereinafter, it demonstrates using the cushion 10 provided in the right end of the passenger seat.

The chamber 120 is sewn into an inner plate 121 in contact with an occupant and an outer plate 122 in contact with a door of a vehicle, and a cross section is formed in an elliptic shape.

3, the tether 130 is formed in a strip shape having a longer length in the longitudinal direction than the width direction, and is vertically attached to the inside of the chamber 120.

That is, the tether 130 is limited in shape so that the chamber 120 does not swell in a spherical shape when the cushion 10 is inflated. At this time, it is preferable that the tether 130 has a dome shape when the cushion 10 is inflated.

The tether 130 may be formed by changing a width according to the thickness of the cushion 10, and may use the same fabric material as that of the chamber 120, or may be made of a cloth that is tougher than the chamber 120. .

As shown in FIGS. 3 and 4, the sewing unit 140 is a portion in which the inner plate 121 and the outer plate 122 and the tether 130 of the chamber 120 are sewn, and includes at least two sewing lines.

The sewing unit 140 may freely change the shape, position and number of the sewing line to adjust the shape of the chamber 120, in particular, the deployment thickness and the deployment height.

Next, a method of manufacturing the side airbag cushion according to the first embodiment of the present invention will be described.

In the method of manufacturing the side airbag cushion according to the present invention, the tether 130 is attached to the inside of the chamber 120 in the longitudinal direction, and the tether 130 and the inner plate 121 and the outer plate 122 of the chamber 120 are alternated. Sewing with arcs to form at least two seams.

For example, as illustrated in FIGS. 3 and 4, the sewing unit 140 may include the first and second sewing lines 141 and 142, the outer plate 122, and the tether sewing the inner plate 121 and the tether 130. A third sewing line 143 for sewing 130 may be provided between the first and second sewing lines 141 and 142.

That is, the first to third sewing lines 141, 142, and 143 may be alternately formed on the inner plate 121 and the outer plate 122 of the chamber 120.

In addition, the sewing unit 140 is preferably provided with three to five sewing lines formed in the width direction of the tether 130.

In addition, the sewing line 140 may be formed inside the tether 130 or may be formed to extend longer than the width of the tether 130, as shown in FIG.

Next, the operation of the side airbag cushion according to the first embodiment of the present invention manufactured as described above will be described.

3 and 4, when the side airbag cushion 10 of the present invention includes the first to third sewing lines 141, 142, and 143, the gas generator 20 is provided through the injection hole 110 during side impact. When the expansion gas is injected from, the chamber 120 is expanded between the vehicle door and the occupant while expanding from the left end of the passenger seat toward the front.

At this time, the tether 130 is attached to the interior of the chamber 120 in the longitudinal direction, the inner plate 121 or the outer plate 122 and the tether 130 of the chamber 120 is sewn alternately, the tether 130 is The curved surfaces are sequentially curved along the first to third sewing lines 141, 142, and 143.

Therefore, in the inner plate 121, between the upper end of the chamber 120 and the first sewing line 141, between the first sewing line 141 and the second sewing line 142, between the second sewing line 142 and the lower end of the chamber 120. Expands convexly. Therefore, the inner plate 121 of the chamber 120 supports the chest and the buttocks in a state in which the part touching the waist of the occupant is most convexly expanded to prevent injury.

In the outer plate 122, the upper end of the chamber 120 and the third sewing line 143 and the third sewing line 143 and the lower end of the chamber 120 are convexly expanded to contact the vehicle door.

As such, the present invention alternately stitches the tether 130 formed in the chamber 120 and the inner plate 121 or the outer plate 122 of the chamber 120 to form a sewing unit 140, so that when the side impact The chest and buttocks of the occupant can be protected.

In addition, since the present invention inflates the cushion 10 by directly injecting an inflation gas into one chamber 120, the deployment speed of the side airbag cushion 10 may be improved as compared with the case where two or more chambers are provided.

In addition, the present invention reinforces the inside of the chamber 120 with the tether 130, and sewing the inner plate 121 and outer plate 122 and the tether 130 of the chamber 120 at regular intervals to form a sewing unit 140 As a result, the expansion force may be dispersed during injection of the expansion gas, thereby improving durability of the cushion 10 to prevent breakage.

Next, other embodiments in which the shape, position, and number of the sewing unit 140 are changed to adjust the deployment thickness and the deployment height of the side airbag cushion will be described.

5 is a perspective view of a side airbag cushion according to a second embodiment of the present invention.

In the second embodiment, the width of the tether 131 is more than twice as wide as that of the tether 130 of the first embodiment.

Accordingly, when the cushion 100 according to the second embodiment of the present invention is deployed due to a side collision, the sewing sewing on the inner plate 121 and the outer plate 122 of the chamber 120 sewn on the tether 131 is performed. As the length of each sewing line 151, 152, 153 of the unit 150 increases, the development thickness may be reduced as compared with the first embodiment.

6 is a front sectional view of a side airbag cushion according to a third embodiment of the present invention.

In the third embodiment, the width of the tether 131 is formed to be wide as in the second embodiment, and the sewing unit 160 includes the first to sixth seams 161 to 166 arranged in two rows.

That is, the cushion 101 according to the third embodiment includes the first to third sewing lines 161, 162 and 163 which sew the inner plate 121 and the tether 131, and the fourth to the sew that sewn the outer plate 122 and the tether 131. Sixth sewing lines 164, 165, and 166; At this time, the first, third, and fifth seams 161, 163, and 165 are formed on the left side of the tether 131, and the second, fourth, and sixth seams 162, 164, 166 are formed on the right side of the tether 131. Therefore, the first to sixth sewing lines 161 to 166 are sequentially formed on the inner plate 121 and the outer plate 122 of the chamber 120 along the width direction of the tether 131 in two rows.

Meanwhile, each of the sewing lines 161 to 166 may be sewn in a nearly dot form.

Accordingly, the cushion 101 according to the third embodiment of the present invention widens the width of the tether 131 and forms the sewing lines 161 to 166 in two rows to reduce the thickness of the cushion 101 and to develop the same. You can also adjust the height.

7 is a front sectional view of a side airbag cushion according to a fourth embodiment of the present invention.

In the fourth embodiment, the tether 130 is formed to be longer in the longitudinal direction than in the width direction as in the first embodiment, and the first to third sewing lines 171, 172, 173 and tethers sewing the tether 130 and the inner plate 121. 130 and the fourth to fifth sewing lines 174 and 175 for sewing the outer plate 122.

That is, the cushion 102 according to the fourth embodiment may adjust the deployment thickness and the deployment height of the cushion 102 as the bending amount of the tether 130 increases by increasing the number of sewing lines 171 to 175.

Through the process as described above, the present invention changes the deployment thickness and deployment height of the chamber by changing the number, shape, and position of the tether attached to the interior of the chamber in the longitudinal direction and the seam alternately formed on the inner and outer plates of the chamber. Can be adjusted.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiments has been described as a sewing line having a predetermined length in the width direction of the tether, but is not necessarily limited thereto. That is, as described in the third embodiment of the present invention, each sewing line may be formed by sewing a predetermined point in the form of a dot or in the longitudinal direction of the tether, or extending longer than the width of the tether to both ends of the chamber. It may be changed to a plurality of rows adjacent to or sequentially formed in the inner and outer plates of the chamber.

1 is a block diagram of a side airbag cushion for protecting the chest and hip according to the prior art.

Figure 2 is a perspective view showing the configuration of the side airbag apparatus according to the first embodiment of the present invention.

3 is a front sectional view of the side airbag cushion shown in FIG.

4 is a side view of the AA ′ line of FIG. 3.

5 is a perspective view of a side airbag cushion according to a second embodiment of the present invention.

6 is a front sectional view of a side airbag cushion according to a third embodiment of the present invention.

7 is a side cross-sectional view of a side airbag cushion according to a fourth embodiment of the present invention.

`` Explanation of symbols for main parts of drawings ''

10: side airbag cushion 20: gas generator

110: injection hole 120: chamber

121: inner plate 122: outer plate

130,131: tether 140: sewing

Claims (9)

In the side airbag cushion installed on the side of the seat in the vehicle and deployed forward between the occupant and the vehicle door in the event of a side collision of the vehicle, Inlet for receiving expansion gas generated from the gas generator, A chamber in which expanded gas is injected and developed through the injection hole; A tether attached longitudinally to the inside of the chamber; An inner plate and an outer plate of the chamber and a sewing unit in which the tether is sewn, The chamber is formed in one size corresponding to the thorax and buttocks of the occupant is installed on one side of the seat to be deployed between the vehicle door and the occupant, The sewing unit has a sewing line formed alternately on the inner and outer plates, Said sewing line is made of three to five, side airbag cushion, characterized in that formed in the inner plate and the outer plate sequentially. delete delete The method of claim 1, wherein the sewing line Side airbag cushion, characterized in that formed in the width direction of the tether. The method of claim 4, wherein the seam Side airbag cushion, characterized in that formed in the interior of the tether. The method of claim 4, wherein the seam Side airbag cushion, characterized in that formed to extend longer than the width of the tether. The method of claim 5 or 6, wherein the sewing line is Side airbag cushion, characterized in that formed in a plurality of rows in the inner plate and the outer plate sequentially in the width direction of the tether. The method of claim 7, wherein the width of the tether is Side airbag cushion, characterized in that the changeable according to the deployment thickness of the chamber. In the side airbag cushion installed on the side of the seat in the vehicle and deployed forward between the occupant and the vehicle door in the event of a side collision of the vehicle, Attaching the tether longitudinally in one chamber formed to correspond to the chest and buttocks of the occupant; Alternately sewing the inner plate and outer plate of the tether and the chamber to sequentially form three to five sewing lines on the inner plate and the outer plate; The tether is a method of manufacturing a side airbag cushion, characterized in that the bending by the expansion gas is injected sequentially into the chamber when the side collision occurs.

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