KR101054203B1 - Knee airbag cushion assembly and folding method - Google Patents

Abstract

The knee airbag cushion assembly of the present invention includes a cushion cover and an airbag cushion accommodated in the cushion cover, wherein the airbag cushion is folded to overlap both ends in a horizontal direction, and the folded portion of the airbag cushion is folded from top to bottom. It is folded back in the opposite direction obliquely, and folded to be folded in the cushion cover by folding the inclined airbag cushion in the longitudinal direction a plurality of times. The present invention improves the folding pattern inclined to prevent overlapping of the seam, thereby providing a slimming effect by preventing a full stomach phenomenon.

Knee airbag, airbag cushion, cushion cover, folding,

Description

Knee air bag cushion assembly and folding method

The present invention relates to a knee airbag cushion assembly and a folding method, and more particularly, to a knee airbag cushion assembly and a folding method for preventing an injury by reducing the impact of the occupant knee in the collision of the vehicle.

In recent years, as the interest in safety of passengers as well as the functionality and convenience of automobiles increases, the importance of safety-related devices that can safely protect passengers in the event of an accident of automobiles is increasing.

Among these stabilizers, the Air Bag System, which protects the occupants in the event of a car crash, is designed to minimize the injuries of the occupants by being deployed toward the occupant when a collision and a collision accident occur in the driving car. .

The air bag types include a driver air bag to protect the driver, a passenger air bag to protect the passenger in the passenger seat, and a door to protect the side parts of the driver and the passenger. Side Air Bags that are inflated in the (Knee Air Bag) and the like to protect the knee of the driver or passengers.

Hereinafter, a conventional knee airbag will be described with reference to the drawings.

1 is a side view showing the mounting structure of the knee airbag according to the prior art.

As shown in Fig. 1, the knee airbag according to the prior art is mounted on a predetermined portion of the lower part of the dash panel 4, in which, in the case of the driver's seat, the steering wheel 2 located in front of the seat of the occupant of the occupant is seated. In the case of a passenger seat, the airbag cushion 10 is installed at a lower portion of the glove box located in front of the lap of the occupant, and the airbag cushion 10 is deployed toward the lap of the rider during a collision of the vehicle. It is configured to include an inflator (not shown) for supplying gas.

In addition, the airbag cushion 10 folds a predetermined width from one side and repeatedly folds a predetermined width from the other side to maintain a folded state.

In addition, the airbag cushion 10 is divided into a chamber in which a high-pressure gas is injected by a seam (not shown).

When the knee airbag module configured as described above detects a shock by a sensor when a collision accident of the vehicle occurs, the inflator (not shown) operates to supply high pressure gas to the airbag cushion 10, and the airbag cushion 10 is It is supplied with a high-pressure gas and expands to a constant volume and spreads toward the driver's knee.

Thus, the knee of the driver is prevented from being injured by hitting the dash panel 4.

However, the airbag cushion 10 according to the related art has a problem that it is difficult to fold a thin thickness because a seam (not shown) partitioning the chamber overlaps when the airbag cushion 10 is folded. .

That is, the airbag cushion 10 should be folded to a minimum shape to secure the space inside the dash panel 4, but the airbag cushion 10 is formed to have a thick thickness by overlapping seams (not shown). In addition, there is a problem in that the internal space of the dash panel 4 for installing the airbag cushion 10 is additionally allocated.

Therefore, it was difficult to install the above-described airbag cushion 10 in the narrow inner space of the dash panel 4.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to improve the folding pattern inclined to prevent the overlapping of the seam, so that the knee airbag cushion assembly and folding is configured slim to prevent full stomach phenomenon In providing a method.

Another object of the present invention is to provide a knee airbag cushion assembly and a folding method for minimizing side folding and inducing rapid deployment to prevent injuries of the occupants.

The knee airbag cushion assembly of the present invention for achieving the above object includes a cushion cover and an airbag cushion accommodated in the cushion cover, wherein the airbag cushion is folded to overlap both ends of the horizontal direction, respectively, the airbag cushion The folded portion of the folded back from the top to the bottom in the opposite direction to be inclined, and folded to be folded in the cushion cover by folding the inclined folded airbag cushion in the longitudinal direction a plurality of times.

Here, the cushion cover, the injection hole is formed, the attachment portion is coupled to the airbag cushion, the one end of the attachment portion is formed to extend the end portion of the side support portion and the side support portion to be folded to the attachment portion is extended to the side support portion It is preferable that the lower support is folded into.

In addition, the reinforcement is formed in the center of the lower support, the reinforcement is preferably folded to the lower support.

And, it is preferable that a retainer is further provided on the airbag cushion coupled to the attachment portion.

In addition, the attachment portion, the side support portion, the retainer and the reinforcement portion is formed with a bolt hole, respectively, each of the bolt holes is preferably the same position when the attachment portion, the side support portion, the retainer and the reinforcement portion is folded .

On the other hand, it is preferable that a tear line is formed in the side support part.

Alternatively, the cushion cover is preferably formed of a nonwoven fabric.

Folding method of the knee airbag cushion assembly of the present invention,

[I] folding the transverse ends of the airbag cushion in an overlapping manner;

[II] folding the airbag cushion in the opposite direction from the upper end to the lower end of the airbag cushion;

[III] folding a portion of the airbag cushion folded at both ends in the horizontal direction in the longitudinal one direction a plurality of times; And

[IV] comprising the step of wrapping the outside of the airbag cushion with a cushion cover.

In addition, after the step [II], it is preferable to further include the step of folding the airbag cushion multiple times in the longitudinal other direction in the longitudinal one direction.

The cushion cover may include an attachment portion formed with an injection hole and coupled to the airbag cushion, and an end portion of one side of the attachment portion formed to be extended to the attachment portion, and one end portion of the side support portion extended to the attachment portion. It is preferable that the lower support is folded into.

In addition, the reinforcement is formed in the center of the lower support, the reinforcement is preferably folded to the lower support.

On the other hand, in the step [III], the attachment portion combined with the airbag cushion is vertically folded to overlap the side support portion, and the horizontal both ends of the overlapping side support portion are folded to overlap the attachment portion again, and the reinforcement portion at the upper end thereof. It is preferable to be folded.

In addition, it is preferable that a retainer is further provided on the airbag cushion coupled to the attachment portion.

The attachment portion, the side support portion, the retainer and the reinforcement portion are each formed with a bolt hole, and each of the bolt holes is preferably coincided with each other when the attachment portion, the side support portion, the retainer and the reinforcement portion are folded. .

In addition, it is preferable that a tear line is formed in the side support part.

Here, the cushion cover is preferably formed of a nonwoven fabric.

According to the knee airbag cushion assembly and the folding method according to the present invention, by improving the folding pattern to prevent the overlapping of the seam, it provides an effect that is made slim by preventing a full stomach phenomenon.

It also provides the effect of minimizing lateral folding and inducing rapid deployment to prevent injury to the occupants.

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

2A to 2M are sequential development views showing a knee airbag cushion assembly and a folding method according to the present invention.

As shown in Figures 2a to 2n, the knee airbag according to the present invention is an airbag housing mounted on the lower portion of the dash panel, and the knee airbag cushion assembly that is stored inside the airbag housing and deployed toward the driver's knee in the event of a crash (A) and an inflator for supplying a high pressure gas to the knee airbag cushion assembly (A). Since this coupling structure is well known, a detailed description thereof will be omitted.

The knee airbag cushion assembly A includes a cushion cover 100 and an airbag cushion 200 accommodated in the cushion cover 100 and deployed by a high pressure gas.

Here, the cushion cover 100 has an injection hole 111 is formed and the attachment portion 110 is coupled to the airbag cushion 200, and one end of the attachment portion 110 is extended to the attachment portion 110 Side end portion 120 is folded into a) and one end of the side support portion 120 is formed of the lower support portion 130 is folded to the side support portion 120.

In addition, both ends of the side support part 120 protrude, and both ends of the protruding end are folded toward the center of the side support part 120 connected to the attachment part 110.

In addition, the center of the lower support portion 130 is formed with a reinforcement portion 140 is cut at both ends, the reinforcement portion 140 is folded into the lower support portion 130.

Meanwhile, fold lines (not shown) are formed at connection portions of the attachment part 110, the side support part 120, the lower support part 130, and the reinforcement part 140 constituting the cushion cover 100, respectively. The airbag cushion 200 described above is easily folded by a line (not shown).

In addition, a tier line 121 is formed on the side support part 120, and the tier line 121 is cut by the airbag cushion 200 deployed.

The airbag cushion 200 is configured by a chamber filled with high pressure gas by the seam 201, and the quadrilateral border of the airbag cushion 200 is also sealed by the seam 201.

Here, the airbag cushion 200 should be folded to maintain a folded state to a minimum shape in order to secure space in the vehicle interior.

In more detail, both ends of the airbag cushion 200 in the horizontal direction are folded to overlap each other. At this time, the seam seams 201 of both edges are folded to exceed the center of the airbag cushion 20 so as not to overlap each other.

Then, both ends of the airbag cushion 200 folded over the center is folded back in the opposite direction obliquely from the top to the bottom again. As such, folding both ends of the airbag cushion 200 inclined in order to prevent the seam 201 crossing the center of the airbag cushion 200 horizontally from overlapping each other causes the filling by overlapping the seam 201. prevent.

In addition, the airbag cushion 200 that is inclinedly folded is folded a plurality of times in the vertical direction and is folded and received in the same size as the surface of the attachment part 110 of the cushion cover 100. Details of the folding method of the airbag cushion 200 will be described later.

In addition, the airbag cushion 200 coupled to the attachment part 110 is provided with a circular retainer 210, and the retainer 210 is coupled with the inflator described above.

Meanwhile, bolt holes 300 are formed in the attachment part 110, the side support part 120, the retainer 210, and the reinforcement part 130, respectively, and each of the bolt holes 300 is the attachment part 110. ), The side support portion 120, the retainer 210 and the reinforcement portion 110 when the position is coincident with each other.

In addition, the cushion cover 100 is formed of a nonwoven fabric to maintain the shape of the folded airbag cushion 200 without affecting the overall thickness.

Hereinafter, the folding method of the above-described knee airbag cushion assembly of the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 2A illustrates a state in which the airbag cushion 200 is fully deployed, and a seam 201 is formed horizontally across the quadrilateral edge and the center of the airbag cushion 200. On the other hand, the seam line 201 of the front and rear across the center of the airbag cushion 200 is formed so as not to match each other.

Then, in the state of FIG. 2A, one end of the airbag cushion 200 in the horizontal direction is folded in the right direction. At this time, as shown in Figure 2b is folded over the center of the airbag cushion 200. Thereafter, the one end folded to the right side is folded back to the left side as shown in FIG.

In addition, in the state of Figure 2c the other end of the horizontal direction of the airbag cushion 200 is folded in the left direction. In this case, as illustrated in FIG. 2D, the airbag cushion 200 is folded over the center of the airbag cushion 200 but overlapped with one end of the airbag cushion 200. Thereafter, the other end folded to the left side is folded back to the right side as shown in FIG.

As described above, the folding of the airbag cushion 200 to be inclined in the opposite direction while overlapping both ends of the airbag cushion 200 is performed so that the seam 201 crossing the center of the airbag cushion 200 horizontally does not coincide with each other. In the seam 201 to prevent the filling.

In addition, as shown in FIG. 2E, the portion folded at both ends of the airbag cushion 200 in the horizontal direction is folded a plurality of times in the vertical one direction as shown in FIGS. 2F to 2H. In the above state, the cushion cover 100 and the airbag cushion 200 are folded. After turning to show the opposite side as shown in FIG. 2I, the airbag cushion 200 is folded again in the other direction and folded to the same size as the inner surface of the attachment part 110 as shown in FIG. 2J.

Therefore, the airbag cushion 200 located inside the attachment portion 110 surrounds the outside with a cushion cover 100.

Specifically, the attachment portion 110 to which the airbag cushion 200 is attached is folded in the vertical direction as shown in FIG. 2K and overlaps the upper end of the side support part 120, and the horizontal both ends of the overlapping side support part 120 are folded to the front. The upper part of the attachment part 110 is overlapped again as shown in FIG. 2L, and the reinforcement part 140 is folded as shown in FIG. 2M to the upper end thereof, thereby completing folding of the knee airbag cushion assembly A of the present invention.

At this time, the knee airbag cushion assembly (A) is completed folding as described above is the bolt hole 300 formed in the attachment portion 110, the side support portion 120, the retainer 210 and the reinforcement portion 140 As shown in FIG. 2L, the positions coincide with each other, and the bolts are coupled to the matched bolt holes 300 to be combined with the inflator or the airbag housing.

On the other hand, even if the bolt is fastened to the above-described bolt hole 300, the airbag cushion 200 can be deployed by the high-pressure gas of the inflator since only the bottom is fixed by the retainer 210 connected to the attachment portion 110. In addition, the airbag cushion 200 deployed by the high pressure gas is deployed by cutting the tear line 121 formed on the side support part 120.

Therefore, the knee airbag cushion assembly (A) is configured to be slim in a folded state to a minimum shape to secure space in the vehicle interior.

As mentioned above, although preferred embodiment of this invention was described in detail, the technical scope of this invention is not limited to the above-mentioned embodiment, It should be interpreted by the claim. It will be understood by those skilled in the art that many modifications and variations are possible without departing from the scope of the present invention.

1 is a side view showing the mounting structure of the knee airbag according to the prior art.

2A to 2M are sequential development views showing a knee airbag cushion assembly and a folding method according to the present invention.

* Description of symbols on main parts of the drawings *

A-Knee Airbag Cushion Assembly

100-cushion cover

200-Airbag Cushion

Claims (16)

Cushion cover; And An airbag cushion accommodated in the cushion cover; ≪ / RTI > The airbag cushion is folded to overlap both ends of the transverse direction, the folded portion of the airbag cushion is folded back in the opposite direction from the top to the bottom in an inclined direction, and folded in the cushion cover by folding the inclined folded airbag cushion multiple times in the vertical direction. Is stored, The cushion cover, An injection hole is formed and is attached to the airbag cushion; A side support portion extending from one end of the attachment portion and folded into the attachment portion; Knee airbag cushion assembly characterized in that consisting of the lower end portion extending from one end of the side support portion is folded into the side support portion. delete The method of claim 1, The reinforcement is formed in the center of the lower support, the reinforcement is a knee airbag cushion assembly, characterized in that folded to the lower support. The method of claim 3, The airbag cushion assembly coupled to the attachment portion is a knee airbag cushion assembly further comprises a retainer. The method of claim 4, wherein The attachment part, the side support part, the retainer and the reinforcement part are each formed with a bolt hole, each bolt hole is characterized in that the position coincides with each other when the attachment part, the side support part, the retainer and the reinforcement part is folded Airbag Cushion Assembly. The method of claim 5, The side support portion is a knee airbag cushion assembly, characterized in that the tear line is formed. The method of claim 6, Knee airbag cushion assembly, characterized in that the cushion cover is formed of a nonwoven fabric. And a cushion cover and an airbag cushion accommodated in the cushion cover, wherein the cushion cover includes an attachment portion formed with an injection hole, coupled to the airbag cushion, a side support portion extended from one end of the attachment portion, and folded into the attachment portion; In the knee airbag cushion assembly consisting of a lower support portion extending from one end of the side support portion is folded into the side support portion, [I] folding the transverse both ends of the airbag cushion in an overlapping manner; [II] folding the airbag cushion in the opposite direction from the upper end to the lower end of the airbag cushion; [III] folding a portion of the airbag cushion folded at both ends in the horizontal direction in the longitudinal one direction a plurality of times; And [IV] wrapping the airbag cushion with the cushion cover; Folding method of the knee airbag cushion assembly comprising a. The method of claim 8, And after the step [II], folding the airbag cushion folded multiple times in one longitudinal direction a plurality of times in the other longitudinal direction. delete The method of claim 8, The reinforcement is formed in the center of the lower support, the reinforcement folding the knee airbag cushion assembly, characterized in that the lower support. The method of claim 11, In the [III] step, The attachment part combined with the airbag cushion is vertically folded to overlap the side support part, and the horizontal both ends of the overlapping side support part are folded to overlap the attachment part, and the reinforcement part is folded to the upper end thereof. Folding method of the assembly. The method of claim 12, The airbag cushion coupled to the attachment portion is a folding method of the knee airbag cushion assembly further comprises a retainer. The method of claim 13, The attachment portion, the side support portion, the retainer and the reinforcement portion are each formed with a bolt hole, each of the bolt hole is characterized in that the position coincides with each other when the attachment portion, side support, retainer and reinforcement portion is folded Folding method of airbag cushion assembly. 15. The method of claim 14, Folding side of the knee airbag cushion assembly, characterized in that the tier support is formed on the side support. The method of claim 15, And the cushion cover is formed of a nonwoven fabric.

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