KR100938328B1 - Curtain Air Bag used Automobile - Google Patents

Abstract

The present invention is to prevent part of the occupant's body by the curtain airbag in the event of a side collision of the vehicle and the rollover of the vehicle, a plurality of chamber walls partitioning a plurality of chambers expanded by the expansion gas ejected from the inflator The front seat airbags each having a different height, the rear seat airbags each having a plurality of chamber walls partitioning the plurality of chambers at different heights, the inflow of the expansion gas connected to two or more of the chambers and entering the chambers. It characterized in that it comprises at least one secondary chamber to be expanded to.

As described above, the present invention protects the occupant by rapidly inflating the curtain airbag during a side collision of the vehicle, and protects the occupant by preventing a part of the occupant's body from being separated because a plurality of secondary chambers are formed in the curtain airbag in the event of a rollover accident. There is a useful effect to be done.

Curtain airbags, front seat airbags, rear seat airbags, chambers, secondary chambers

Description

Curtain Air Bags for Automobiles {Curtain Air Bag used Automobile}

The present invention relates to a curtain airbag for a vehicle, and more particularly, to a curtain airbag for a vehicle that is installed on the side of the occupant together with airbags installed in the driver's seat and the passenger seat to protect the occupant in the event of a rollover accident as well as a side collision of the vehicle.

As is well known, the vehicle is provided with an airbag to mitigate the impact on the occupant together with the seat belt to protect the occupant in the event of a collision.

These airbags include driver airbags (DAB) and passenger airbags (PAB) to protect front passengers in frontal collisions, side airbags (SAB) and curtain airbags (CAB) to protect passengers in the event of side impacts. There are various types.

These airbags are installed in the driver's seat and the passenger seat to protect the driver and the front passenger, and the shock absorber serves to prevent the passenger's body from being forwardly moved by a car crash or a sudden stop during driving, so that they do not hit the steering wheel or the instrument panel directly. Done.

The airbag is operated by a collision detection sensor and an electronic control unit (ECU) in the event of a vehicle crash. The collision sensor detects a shock and sends it to the ECU when the vehicle crashes. Therefore, it is determined whether the airbag is operated, and if it is a condition to operate the airbag, the inflator is operated to inflate the airbag.

At this time, the inflator is connected to the airbag installed in a folded state, and when operated by the ECU, the heater inside thereof generates heat to ignite the gunpowder, burns the gas generating agent, and injects a large amount of expanded gas generated in an instant into the airbag. Will expand.

In recent years, in order to protect the occupant in the event of a side collision, the side airbag installed inside the door is to protect the occupant's side.

These side airbags are installed on the roof rails of the upper and rear seats, and when an impact is applied from the side, the airbag is deployed by the inflator to protect the occupants.

Meanwhile, the curtain airbag is disclosed in Korean Patent Application No. 2002-55326, which discloses an automobile side airbag (hereinafter referred to as 'prior art 1').

As shown in FIG. 1, the side airbag for a vehicle of the related art 1 is installed in an airbag 100 installed inside the headlining of the roofside panel 101, and is provided at one side of the airbag 100, and inside One side end is connected to the inflator 110 in which the gas generating agent is stored so that the air bag 100 can be deployed in a side collision, and the other end is rotatably installed on the roofside panel 101. It consists of a member 120.

In addition, Japanese Unexamined Patent Publication No. 2001-171471 discloses an inflatable air bag (hereinafter referred to as "prior art 2"), which is shown in FIG.

As shown in Figure 2, the airbag of the prior art 2 has at least one main chamber 140, the main chamber 200 is connected to the gas generator 210, the main chamber 200 in the expanded state ) Is an inflatable airbag that at least partially covers the sidewalls in the vehicle, having at least one additional airbag region, wherein the additional airbag region is formed with an at least approximately spherical chamber 260 in the inflated state.

In addition, the chamber extension 220 extends below the adjacent chamber region and then extends below the lower boundary 280 of the window.

Such a side airbag of the prior art 1 has the advantage of operating the front and rear seats as a single airbag, but the gas generated from the inflator unfolds perpendicular to the direction of ejection of the front seats (including the driver) There was a problem that can not be quickly protected.

In addition, the airbag of the prior art 2 is narrowly formed by the seam 242 formed in the upper main chamber portion 250, so that the inflow of the expanded gas ejected from the gas generator 210 is slow to protect the front occupant quickly The circular seam 244 and the seam 242 partitioning each chamber 200 are formed to face the ejection direction of the gas generator 210 so that the expansion gas ejected from the gas generator 210 flows uniformly. There was a disadvantage that can not be.

In addition, the curtain airbag may protect the side of the occupant by inflation of the curtain airbag in the event of a side collision of the vehicle. However, in the event of the vehicle overturning, the curtain airbag is preferably expanded to protect the occupant. However, the curtain airbag has a large chamber. There was a problem that the size and capacity of the inflator should be increased.

That is, the inflator must be enlarged because the inflating gas that inflates the airbag must be ejected in a large amount and inflated, and when the inflator becomes large, it becomes difficult to install the inflator in the vehicle.

In addition, when an overturning accident occurs, there is a problem in that a part of the body such as the head or the arm of the occupant is separated from the vehicle due to the overturning of the vehicle, thereby preventing the occupant.

Disclosure of the Invention An object of the present invention devised to solve the above problems is to provide a curtain airbag for a vehicle so that a part of the occupant's body is not separated by the curtain airbag during a side collision of the vehicle and an overturning accident of the vehicle.

Another object of the present invention is to provide a curtain airbag for automobiles by forming a plurality of secondary chambers in the curtain airbag to maintain the inflation pressure of the curtain airbag for a certain time.

In order to achieve the above object, the cut airbag for a vehicle of the present invention includes a front seat airbag and a plurality of chambers, each of which has a plurality of chamber walls partitioning a plurality of chambers which are expanded by an inflation gas ejected from the inflator, respectively. A plurality of chamber walls defining a plurality of chamber walls each having a different height, and at least one secondary chamber connected to at least two of the chambers and expanded with an inflow of inflation gas introduced into the chamber. do.

In the present invention, the curtain airbag is inflated quickly in the event of a side collision of the car to protect the occupant, and a plurality of secondary chambers are formed in the curtain airbag when an overturning accident occurs, thereby preventing the part of the occupant's body from falling off. There is a useful effect to protect.

In addition, the present invention has a useful effect of safely protecting the occupant when the inflated gas is slowly discharged after the secondary chamber is inflated and the inflation time of the curtain airbag is delayed and the collision is more than two times due to the rollover accident.

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

First Embodiment

3 is a front view showing a curtain airbag for a vehicle according to a first embodiment of the present invention.

As shown in Figure 3, the curtain airbag 1 of the present invention is a front seat airbag 10 located in the front seat of the vehicle, a rear seat airbag 20 located in the rear seat of the vehicle, the front seat airbag 10 At least one secondary chamber 30 is formed in the rear seat airbag 20.

A plurality of chambers are formed in the front seat airbag 10, and the first chamber 11a, the second chamber 11b, the third chamber 11c, and the fourth chamber are sequentially formed from a portion in contact with the front pillar assembly of the vehicle. 11d is formed, and the first chamber wall 12a, the second chamber wall 12b, and the third chamber wall 12c are formed between these chambers 11a to 11d.

In addition, these chamber walls (12a ~ 12c) is formed to be curved in the form of the back of the expansion direction of the expansion gas ejected from the inflator (not shown in the figure) to facilitate the flow of the expansion gas.

That is, the inflator is installed to be operated by the control signal of the electronic control unit on the upper side of the rear seat airbag 20 or the quarter outer panel assembly to which the rear seat airbag 20 is in contact.

The first chamber 11a of the chambers 11a to 11d is formed to have a relatively wider space than the other chambers 11b to 11d, and divides the first chamber 11a and the second chamber 11b. The first chamber wall 12a is formed by bending towards the front pillar panel assembly.

The first chamber wall 12a is bent horizontally toward the front pillar panel assembly as shown in FIG. 3, and is formed lower than the second chamber wall 12b with respect to the second chamber wall 12b. The chamber wall 12c is formed higher than the second chamber wall 12b.

In addition, the fourth chamber wall 12d, which is a horizontal chamber wall, is formed horizontally on the upper portion of the first chamber wall 12a, so that the expansion gas ejected from the inflator is divided to form the first chamber 11a and the second chamber 11b. To flow smoothly).

In addition, the second chamber wall 12b partitions the second chamber 11b and the third chamber 11c, and the third chamber wall 12c defines the first chamber wall 12a and the second chamber wall 12b. The fourth chamber 11d is formed at one side of the third chamber wall 12c, and the bottom of the fourth chamber 11d is positioned at a position higher than the bottoms of the other chambers 11a to 11c. Done.

The curtain airbag 1 has a plurality of secondary chambers 30a, 30b, 30c, the first secondary chamber 30a, the second secondary chamber 30b, and the third secondary chamber 30c. The first secondary chamber 30a and the second secondary chamber 30b are respectively formed in the lower portion of the partition 31 between the front seat airbag 10 and the rear seat airbag 20. The secondary chamber 30c of three is formed in the rear seat airbag 20.

The first secondary chamber 30a is horizontally connected to the third chamber 11c and the fifth chamber 21a, and the second secondary chamber 30b is connected to the fourth chamber 11d. It is connected to the fifth chamber 21a and formed horizontally.

These first secondary chambers 30a and the second secondary chambers 30b are connected by narrowly formed connecting portions 32, which are inlet and outlet of the expansion gas introduced into each chamber. do.

The curtain airbag 1 is also formed of one weave.

In the present invention, the one-piece curtain airbag 1 is cut to the same size and cut into a symmetrical form rather than being joined by sewing or joining, and the one-piece woven which is folded and sealed based on the center line ( One Piece Woven).

In addition, the division part 31 is formed at the backrest position of the seat protruding into the interior of the vehicle and serves as a boundary for distinguishing the front seat airbag 10 and the rear seat airbag 20, and the division part 40 is When the curtain airbag 1 is inflated, it is inflated without interference to the back of the seat.

A fifth chamber 21a, a sixth chamber 21b, a seventh chamber 21c, and an eighth chamber 21d are formed in the rear seat airbag 20, and the chambers 21a to 21d are respectively formed between the chambers 21a to 21d. Walls 22a to 22c are formed.

In addition, connection portions 32 are formed in the fifth chamber 21a to connect the first secondary chamber 30a and the second secondary chamber 30b.

In addition, the fifth chamber wall 22a of the rear seat airbag 20 is formed higher than the sixth chamber wall 22b and the seventh chamber wall 22c, and the sixth chamber wall 22b is the fifth chamber wall 22a. In addition to being formed lower, the upper and lower ends thereof are formed smaller than the height of the airbag so that the adjacent sixth chamber 21b and the seventh chamber 21c communicate with each other.

A third secondary chamber 30c is formed horizontally between the sixth chamber wall 22b and the seventh chamber wall 22c and does not expand above and below the third secondary chamber 30c. 23 is formed, and the both ends of this space part 23 protrude inward, and the inlet is narrowly formed.

In addition, the seventh chamber wall 22c is formed such that the adjacent seventh chamber 21c and the eighth chamber 21d communicate with each other like the sixth chamber wall 22b.

The curtain airbag 1 of the present invention having such a configuration detects the strength of the collision at the collision of the vehicle and sends it to the ECU, and determines whether the curtain airbag 1 operates in the electronic control unit. .

The electronic control unit sends a signal to the inflator to operate the curtain airbag 1 from the electronic control unit when a strong impact is applied to the side of the vehicle, and in the inflator, electric ignition is generated by a short instant in the built-in ignition circuit. By igniting the built-in gunpowder is triggered.

The heat generated by the explosion of the explosives burns the gas generator and the curtain airbag 1 is inflated in a very short time between 0.02 and 0.05 seconds.

In this way, the inflation gas ejected from the inflator expands the chambers 11a to 11d while passing through the chamber walls 12a to 12c which are formed to be curved in the same direction as the expansion direction of the expansion gas. In addition, the rear seat airbag 20 is inflated by expanding the chambers 21a to 21d partitioned by the chamber walls 22a to 22c.

At this time, the expansion gas introduced into the third chamber 11c, the fourth chamber 11d, and the fifth chamber 21a is respectively connected to the first secondary chamber 30a and the second secondary chamber through the connecting portion 32. 30b are respectively inflated.

In addition, the expansion gas flows into the third secondary chamber 30c formed in the rear seat airbag 20 to expand the third secondary chamber 30c, and these secondary chambers 30a to 30c are chambers. Are expanded somewhat slower than the fields 11a-11d and the chambers 21a-21d.

The inflated curtain airbag 1 protects the occupant in the front or rear seat when a collision occurs due to a side collision of the vehicle, and the rollover airbag 1 remains inflated for a predetermined time, thereby causing an overturning accident. You will also protect the occupants.

These secondary chambers (30a ~ 30c) is formed on the part of the body part, such as the head or arm of the occupant when the overturn accident occurs to prevent the body part of the occupant is separated.

That is, the first secondary chamber 30a and the second secondary chamber 30b of the secondary chambers 30a to 30c are inflated by the injection of the inflation gas at the non-pillar position of the vehicle, so that the curtain airbag 1 Keep the expanded state more firm.

The first secondary chamber 30a and the second secondary chamber 30b may include the secondary chambers 30a, after the curtain airbag 1 is inflated as the inflation gas is injected and discharged through a narrowly formed inlet. Inflation gas injected into 30b) supplies the inflation gas to the front seat airbag 10 and the rear seat airbag 20, and the front seat airbag 10 and the rear seat airbag 20 maintain their inflated state for a long time. .

In addition, since the secondary chambers 30a and 30b are expanded at the non-pillar position of the vehicle, when a small passenger rides, the head or arm of the passenger is caught between the bottom of the curtain airbag 1 and the window. Will be prevented from occurring.

That is, even if a small passenger is positioned between the bottom of the inflated curtain airbag 1 and the window, the inflated state of the curtain airbag 1 is maintained by the secondary chambers 30a to 30c. Done.

In addition, even if a part of the passenger's body collides between the bottom of the curtain airbag 1 and the window, the secondary chambers 30a, 30b of the curtain airbag 1 hold the curtain airbag 1 so that the curtain airbag 1 does not move. This prevents part of the passenger's body from getting caught between the base and the window.

<Example 2>

4 is a front view showing a curtain airbag for a vehicle according to a second embodiment of the present invention.

As shown in Fig. 4, the curtain airbag 1 according to the second embodiment of the present invention will be described using the same names and symbols as the first embodiment, and the same description as the first embodiment will be omitted. .

In the curtain airbag 1 according to the second embodiment, a fourth secondary chamber 40a and a fifth secondary chamber 40b are formed, respectively.

The fourth secondary chamber 40a is connected to the third chamber 11c and the sixth chamber 21b, and the fourth secondary chamber 40a has an uneven shape having a variable length.

In addition, the fifth secondary chamber 40b is formed to be separated substantially in the horizontal direction between the sixth chamber wall 22b and the seventh chamber wall 22c of the rear seat airbag 20, and the fifth secondary chamber ( 40b) has both inlets narrowly formed, and a space portion in which the inflation gas is filled is formed therein.

In addition, the fifth secondary chamber 40b has a concave-convex shape.

The curtain airbag 1 according to the second embodiment of the present invention as described above will be omitted the same description as in the first embodiment described above, the fourth secondary chamber 40a and the fifth secondary chamber 40b. ) Will be described.

The fourth secondary chamber 40a has the same function as the pleats 35 of the first embodiment described above, and the fifth secondary chamber 40b is positioned at the third secondary chamber 30c. As such, the third secondary chamber 30c and the fifth secondary chamber 40b may be selectively formed with any one of the secondary chambers 30c and 40b in the rear seat airbag 20. .

The curtain airbag 1 is inflated with the front seat airbag 10 and the rear seat airbag 20, and the secondary chambers 40a and 40b gradually expand as the expansion gas is introduced through the narrow inlet.

When the inflation gas pressure of the front seat airbag 10 and the rear seat airbag 20 is lowered, the inflated curtain airbag 1 is filled with the inflation gas filled in the secondary chambers 40a and 40b, respectively. The rear seat airbag 20 is discharged to inflate the front seat airbag 10 and the rear seat airbag 20.

On the other hand, a small height of the passenger's head or arm hit the bottom of the curtain airbag (1), even if the passenger's body hit the bottom of the tightly inflated curtain airbag (1) part of the body curtain It will not get caught between the airbag 1 and the window.

That is, the curtain airbag 1 maintains the inflated state by the inflation gas discharged from the secondary chambers 40a and 40b for a long time, and even if the occupant's body pushes up the underside of the curtain airbag 1, The secondary chamber 40a is fixed in a state caught by the non-pillar of the vehicle.

Accordingly, when the occupant's body pushes up the curtain airbag 1, the curtain airbag 1 remains fixed against the force exerted on the curtain airbag 1 so that the occupant's head or arm is lifted from the curtain airbag 1 This prevents them from escaping outward.

In addition, the fifth secondary chamber 40b also discharges the expansion gas filled in the space into the rear seat airbag 20 to keep the curtain airbag 1 taut and to reduce the impact even when the rear seat occupants the head. To protect the occupants.

1 is a front view showing a conventional curtain airbag.

Figure 2 is a front view showing a conventional curtain airbag.

Figure 3 is a front view showing a curtain airbag for a vehicle according to a first embodiment of the present invention.

Figure 4 is a front view showing a curtain airbag for a vehicle according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: curtain airbag 10: front seat airbag

11a, 11b, 11c, 11d: 1st, 2nd, 3rd, 4th chamber

12a, 12b, 12c, 12d: first, second, third and fourth chamber walls

20: Rear seat airbag 21a, 21b, 21c, 21d: 5th, 6th, 7th, 8th chamber

22a, 22b, 22c: 5th, 6th, 7th chamber walls 23: space part

30a, 30b, 30c: secondary chamber 31: division

32: connection

Claims (9)

A front seat airbag having a plurality of chamber walls each having a different height, the chamber walls partitioning the plurality of chambers inflated by the expansion gas ejected from the inflator, A rear seat airbag in which a plurality of chamber walls defining a plurality of chambers are formed at different heights, One or more secondary chambers connected to two or more of the chambers and expanded with an inflow of inflation gas introduced into the chamber, The secondary chamber comprises two secondary chambers comprising a first secondary chamber and a second secondary chamber formed horizontally between the front seat airbag and the rear seat airbag. Curtain airbag for a vehicle, characterized in that it comprises a third secondary chamber formed horizontally on the rear seat airbag. delete The method of claim 1, The secondary chamber is a fourth secondary chamber that is variable in length between the front and rear seat airbags, And a fifth secondary chamber formed horizontally on the rear seat airbag and selectively formed to fill the inflation gas discharged through the narrow inlet. The method of claim 3, The first secondary chamber is an automobile curtain airbag, characterized in that formed on the lower side of the front seat airbag and the rear seat airbag. The method of claim 3, And the second secondary chamber is spaced apart from the upper portion of the first secondary chamber. The method of claim 3, The secondary chamber is an automobile curtain airbag, characterized in that the inlet and outlet of the expansion gas is made through a connection portion connected to one or more chambers. The method of claim 3, The plurality of chamber walls formed on the front seat airbag may have a first chamber wall that is formed to be lower than a height of the second chamber wall based on the second chamber wall formed at an intermediate position. Curtain airbag for a vehicle, characterized in that made of a third chamber wall formed higher than the second chamber wall. The method of claim 3, The front airbag is a curtain airbag for a vehicle, characterized in that the horizontal chamber wall is formed horizontally formed on the upper portion of the first chamber wall. The method according to claim 1 or 3, The plurality of chamber walls formed in the rear seat airbag is an automotive curtain airbag, characterized in that the upper and lower ends of the chamber wall is formed in communication with the adjacent chamber.

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