KR102139263B1 - An airbag cover for early distinguish of defects - Google Patents

Abstract

The present invention relates to an airbag cover. According to the present invention, the airbag cover for early identification of defects is an airbag cover which rolls like a rolled paper before expanding to fix the airbag installed on a vehicle by wrapping around the outer circumference of the airbag, comprising: a winding unit which includes an overlapped part whose one end is temporarily fixed on the outer circumferential surface of the airbag to wrap around the outer circumferential surface once and whose other end wraps around the outer circumferential surface once or more to be overlapped with the part on the one end; and an attachment unit which has an area almost the same as that of the overlapped part to provide adhesiveness, respectively, to an upper surface and a lower surface. The attachment unit includes a thin plate-shaped transparent base material having almost the same area as that of the overlapped part to have a grid pattern printed on an upper surface coming in contact with the overlapped part. Double-sided tape is respectively attached to the upper surface and the lower surface of the base material. The airbag cover maintains the airbag in a rolled configuration like a rolled paper in ordinary times since the overlapped part becomes a temporarily attached status by the double-sided tape respectively attached to the upper surface and the lower surface of the attachment unit. When the adhesive force of the double-sided tape is reduced, at least a part of the overlapped part is lifted upward to allow a user to visually identify the grid pattern from outside, thereby showing the defects. Accordingly, according to the present invention, there are merits to make it easy to detect and recognize defects when installing an airbag and to rapidly identify the positions and degree of the defects.

Description

Airbag cover for early defect identification {AN AIRBAG COVER FOR EARLY DISTINGUISH OF DEFECTS}

The present invention relates to an airbag cover used to maintain an assembled state of an airbag for a vehicle, and more particularly, to an airbag cover capable of easily confirming a defective state.

The airbag is installed on the steering wheel of the driver's seat, the dash board of the passenger's seat, the roof side panel of the vehicle body, the backrest of the seat, etc., and is installed to protect the occupants in the vehicle from a vehicle collision or rollover.

In such an airbag, a plurality of collision detection sensors are installed to detect the impact when a driving vehicle is impacted by a frontal collision or a side collision at a speed of about 40km/h or more.

The electronic control module controls the vehicle so that the vehicle can travel safely, and a collision detection sensor is connected to the electronic control unit. That is, the collision detection sensor detects the amount of impact generated when the vehicle collides and sends it to the electronic control unit, and the electronic control unit compares the set amount of impact with a previously input value input to the electronic control unit.

The electronic control unit compares the amount of impact input from the collision detection sensor with the previous input value, and sends a control signal to fire the airbag to the inflator when the amount of impact is greater than the input value, and the control that fires the airbag when the amount of impact is less than the input value. It will not send the signal to the inflator.

In addition, an inflator for inflating the airbag is installed in the airbag. In the inflator, a built-in ignition device is operated according to a control signal from the electronic control unit, and the ignition device detonates the gunpowder embedded in the inflator to generate inflation gas.

The inflation gas generated from the inflator flows into the airbag internal space through an outlet installed in the inflator, and the airbag is inflated by the inflation gas ejected from the inflator to protect the occupants.

These airbags are installed in a folded state, and an airbag cover is covered outside the airbag so that the airbag is stably installed.

The airbag cover has an incision that is broken when the airbag is installed and the airbag is inflated, and the airbag cover material is made of a material such as polyamide or nylon 66, which is the same material as the airbag.

In recent years, the airbag cover material is made of nonwoven fabrics, and these nonwovens are classified into spunbond nonwovens, melt blown spunbond nonwovens, embossed nonwovens, and needle punching nonwovens depending on the material and manufacturing method.

The spunbond nonwoven fabric is a long-fiber nonwoven fabric produced from polypropylene as a raw material, and is a spunbond (SS) nonwoven fabric, a melt blown nonwoven fabric, a SMS (Spunbond Melt Blown Spunbond) nonwoven fabric, and a SMMS ( There are Spunbond Melt Blown Melt Blown Spunbond) nonwovens, but spunbond nonwovens are mainly used.

These spunbond nonwoven fabrics form a web by continuously melting and extruding polypropylene fiber polymers through numerous nozzles and then continuously laminating them on a moving conveyor belt through a cooling process, and a nonwoven fabric in the form of a web by heat fusion by heating. To form and wind it up.

The spunbond nonwoven fabric can produce a nonwoven fabric having a wide range of physical properties according to various mechanical design and operating factor changes in the manufacturing process, and since continuous long fibers are used, the properties differ according to the weight per unit area.

Airbags used in automobiles are manufactured in a certain shape and then mounted in a folded state in order to minimize their volume and mounted on a steering wheel of a vehicle. At this time, in order to maintain the folded state of the airbag, the cushion is covered with a cover and mounted. In this way, the cover of the car airbag is applied to assemble and maintain the condition of the car airbag.

A typical airbag fixing cover is made of the same material as polyamide (nylon 66), the main material of automobile airbags, in order to make it easier to manage the manufacturing process of the airbag system, and includes a cutout in the center to facilitate tearing when deploying the airbag. Are doing.

However, nylon 66 fabric used as a main material for automobile airbags is expensive and has high tensile strength, and thus, when used as a cover for automobile airbags, there is a problem that the airbag cannot be deployed smoothly. In other words, if there is a less incision part, the airbag may not be deployed in time or may not be operated, resulting in fatal results.

In order to solve this problem, the gap between the cutout portions of the cover is increased, and the gap of the connecting joints that maintain the shape of the cover between the cutouts has to be minimized. However, when the gap between the connecting joints of the cover for fixing the car airbag is minimized, the part that should not be cut is cut by a laser cutting machine or a blade cutting machine, so that the folded state, which is used as a cover for fixing a car airbag, is not properly maintained. There is this. In particular, there is a problem of deteriorating workability when a vehicle airbag is directly mounted and assembled to a blasting device or a vehicle. Therefore, when a fabric woven in plain weave is applied to the cover for fixing the airbag, only the warp or weft yarn is connected in a straight line at the joint part, so it is not possible to maintain the folded state of the airbag, and it is likely to cause the result of eventually tearing. Big.

In addition, in order to solve the above problems, some products may use a cover for fixing an airbag using a packaging film, but this also means that the tensile strength of the packaging film is not sufficient, so the operator's error at work, or machinery and various facilities By contacting and tearing, the shape, which is the role of the cover for fixing the airbag of the vehicle, cannot be maintained, and the assembly properties to be mounted on the vehicle are often poor.

Since the prior art for checking the state of the airbag and the airbag cover and determining the defect has not been investigated, the present invention provides a technology for easily identifying the defect when checking the airbag and the airbag cover.

Korean Patent Registration No. 10-0904849 (Name: Non-woven cover for fixing airbags, registration date: June 19, 2009) Republic of Korea Patent Publication No. 10-2006-0002462 (Name: non-woven fabric cover for fixing airbag cushion, Publication date: January 9, 2006)

The present invention was invented to improve the above-described problem, and an object to be solved by the present invention is to provide an airbag cover that facilitates defect identification and recognition during installation or inspection of an airbag by including pattern printing on a substrate.

In addition, another problem to be solved by the present invention is to provide an airbag cover capable of quickly identifying a defect location and its degree by providing a plurality of cut lines on the surface.

The technical problem of the present invention is not limited to those mentioned above, and another technical problem that is not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention conceived to achieve the above object, the airbag cover capable of early defect identification is an airbag cover that surrounds and fixes the outer circumference of an airbag installed in a vehicle by being rolled like a roll before inflating, and one end is an airbag A winding unit including an overlap portion temporarily fixed to the outer circumferential surface of the outer circumferential surface and wound around the outer circumferential surface by one turn, and at the other end of the outer circumferential surface by winding at least one round and overlapping; And an attachment portion that has approximately the same area as the overlap portion and provides an adhesive force to the upper and lower surfaces thereof, wherein the attachment portion has an area approximately equal to the area of the overlap portion and a lattice pattern is printed on the upper surface in contact with the overlap portion. It includes a transparent substrate in shape, and double-sided tapes are attached to the upper and lower surfaces of the substrate, respectively, and the airbag cover is temporarily attached by a double-sided tape attached to the upper and lower surfaces of the attachment part, so that the airbag is normally attached. It is characterized in that it maintains a rolled shape like a roll, and when the adhesive strength of the double-sided tape decreases, at least a part of the overlapped portion is lifted and the grid-like pattern can be visually identified from the outside, indicating a defect.

In the overlapping portion of the airbag cover, a plurality of incision lines having a length substantially the same as the width of the substrate are formed, and when the adhesive strength of the double-sided tape decreases, at least a portion of the overlapping portion is lifted and the grid pattern can be visually identified from the outside. It is characterized in that it indicates a defect.

The winding part of the airbag cover is characterized in that it is made of a polyethylene terephthalate (PET) nonwoven fabric or a polypropylene (PP) nonwoven fabric.

The winding portion of the airbag cover is characterized in that the thickness is 0.28 to 0.34 mm.

The winding portion of the airbag cover is characterized in that the tensile strength is 15 to 45 kgf/5cm.

According to an embodiment of the present invention, there is an effect of providing an airbag cover that facilitates defect identification and recognition when installing or checking an airbag by including pattern printing on a substrate.

In addition, according to an embodiment of the present invention, there is an effect of providing an airbag cover capable of quickly identifying a defect location and its degree by providing a plurality of cut lines on the surface.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of an airbag cover capable of early failure identification according to an embodiment of the present invention.
2 is a perspective view of an airbag cover capable of early failure identification according to an embodiment of the present invention, and is a view showing a state in which some flaps are lifted.
3 is an exploded view of an airbag cover capable of early failure identification according to an embodiment of the present invention.
4 is a side cross-sectional view of an overlap portion and an attachment portion of an airbag cover capable of early failure identification according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily implement the present invention.

In describing the embodiments, descriptions of technical contents well known in the technical field to which the present invention pertains and which are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention by omitting unnecessary description.

For the same reason, some components in the accompanying drawings are exaggerated, omitted, or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same reference numbers are assigned to the same or corresponding elements in each drawing.

1 is a perspective view of an airbag cover capable of early failure identification according to an embodiment of the present invention.

Referring to FIG. 1, a perspective view of an airbag and an airbag cover 100 capable of early failure identification is shown. Here, the airbag 10 is rolled like a roll and has a shape similar to a cylinder, and the outer peripheral surface formed by the airbag 10 is rolled, and an airbag cover 90 capable of early defect identification is enclosed.

In addition, it can be seen that a plurality of cut lines 60 are formed at one end of the airbag cover 90 capable of early failure identification, thereby forming a plurality of flaps 65.

The flap 65 is for easy identification of a case in which there is a problem in the storage state of the airbag cover surrounding the outer periphery of the airbag 10, which will be described below with reference to FIG. 2.

2 is a perspective view of an airbag cover capable of early failure identification according to an embodiment of the present invention, and is a view showing a state in which some flaps are lifted.

Referring to FIG. 2, it can be seen that some of the flaps 65 among the airbag 10 and the airbag cover 100 capable of early failure identification are lifted. In this way, when the flap 65 is lifted, it means that there is a problem in the state of the airbag 10 and the airbag cover 100 capable of early defect identification. Time can be shortened. In addition, the lattice pattern 71 covered by the flap 65 is exposed at the position where the flap 65 is excited so that the flap 65 can be visually identified more easily, the lattice pattern 71 ) Will be described in detail with reference to FIGS. 3 and 4.

3 is an exploded view of an airbag cover capable of early failure identification according to an embodiment of the present invention.

Referring to FIG. 3, it can be seen that the airbag cover 90 capable of early defect identification becomes a square when unfolded. The winding portion 50 is a portion that surrounds the outer periphery of the airbag 10, and it is preferable to have a length such that it surrounds the outer periphery of the airbag 10 once.

In addition, it can be seen that the right end of the airbag cover 90 capable of early failure identification is referred to as an overlap portion 80, and the attachment portion 70 is included in the overlap portion 80. Here, when the outer periphery of the airbag 10 is wound with the airbag cover 90 capable of early defect identification, the overlap portion 80 surrounds the outer periphery and indicates a portion where the airbag covers overlap.

That is, the airbag cover 90 capable of early defect identification has a longer length than the one round the airbag 10, so that the overlapping portion of the airbag cover 90 capable of early defect identification It is called.

The overlapping portion 80 includes an attachment portion 70 having an adhesive force, so that the airbag cover 100 capable of early failure identification overlapping is maintained in an attached state, thereby maintaining the airbag 10 in a rolled state. Make it possible.

Here, the attachment portion 70 has a substantially the same area as the area of the overlap portion 80 and a thin plate-shaped substrate 75 on which the lattice pattern 71 is printed on the upper surface in contact with the overlap portion 80 Including, double-sided tapes 74 and 76 are attached to the upper and lower surfaces of the substrate 75, respectively.

The shape of the overlap portion 80 and the attachment portion 70 viewed from above can be confirmed through FIG. 3, and a side cross-sectional view when the overlap portion 80 and the attachment portion 70 is viewed from the side is shown in FIG. 4 Has been.

4 is a side cross-sectional view of an overlap portion and an attachment portion of an airbag cover capable of early failure identification according to an embodiment of the present invention.

Referring to FIG. 4, a flap 65 is formed at a right end of an airbag cover 90 capable of early failure identification, and an attachment portion 70 is attached to a lower portion of the flap 65. Here, when the outer circumference of the airbag 10 is wound with an airbag cover 90 capable of early defect identification, the overlap portion 80 refers to a portion overlapping the airbag covers around the outer circumference once, and the overlap portion 80 The width of the and the attachment portion 70 is approximately the same, and the width of the overlap portion 80 is preferably set to be slightly wider than the width of the attachment portion 70.

As described with reference to FIGS. 3 and 4, the reason why the lattice pattern 71 is printed on the upper surface of the substrate 75 is that the airbag 10 and the airbag cover 100 capable of early failure identification are in poor condition or When there is a problem, the flap 65 is lifted and the lattice pattern 71 is exposed to the outside, so that the defective state of the airbag 10 and the airbag cover 100 capable of early failure identification can be visually easily identified.

When the condition of the airbag 10 and the airbag cover 100 capable of early failure identification is poor or there is a problem, some flaps 65 are lifted and the substrate 71 covered by the flap 65 is thus exposed to the outside. do. In addition, since the lattice pattern 71 is printed on the upper surface of the substrate 75, the lattice pattern 71 becomes immediately visible when the substrate 71 is exposed to the outside, so that the airbag 10 and early defect identification are possible. The defective state of the airbag cover 100 is easily recognized visually.

As described above, the airbag 10 and the airbag cover 100 capable of early failure identification according to a preferred embodiment of the present invention have been described.

The timing of checking the defects of the airbag 10 and the airbag cover 100 capable of early defect identification using the airbag 10 and the airbag cover 100 capable of early defect identification described through the present specification is, early defect identification is It is preferable that the possible airbag cover 90 be wound around the airbag 10 and immediately before being installed on the vehicle. That is, immediately before the airbag 10 and the airbag cover 100 capable of early failure identification are installed in the vehicle, it is checked again in an easy way to see if they are preferably aligned.

In addition, in the airbag cover 90 capable of early failure identification as described above, the substrate 75 on which the grid pattern 71 is printed is preferably formed of a thin plate-shaped transparent material. When the substrate 75 is formed of an opaque material, the grid pattern 71 must be printed on both the upper and lower surfaces of the substrate 75 so that the lower surface of the substrate 75 can be easily identified. , If the substrate 75 is formed of a transparent material, even if the lattice pattern 71 is printed only on either side of the upper or lower surface of the substrate 75, see whether the upper or lower surface of the substrate 75 is lifted. This is because it enables visual defect identification, which is the main point of the invention.

As described above, when the airbag cover 90 capable of early defect identification is wound around the airbag 10, when the flap 65 is excited and the grid pattern 71 is visible, the corresponding airbag 10 ) And the airbag cover 100 capable of early defect identification can be determined as a defective state, so that the inspection process can be simplified, thereby reducing the time and cost required for the inspection process.

Meanwhile, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms have been used, they are merely used in a general sense to easily describe the technical contents of the present invention and to help understand the invention. It is not intended to limit the scope of the invention. It is apparent to those skilled in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10: air bag 50: winding part
60: incision line 65: flap
70: attachment portion 71: grid pattern
74: double-sided tape 75: substrate
76: double-sided tape 80: overlap portion
90: Airbag cover for early defect identification
100: Airbag and airbag cover for early failure identification

Claims (5)

It is an airbag cover that surrounds and fixes the outer periphery of an airbag installed in a vehicle by drying it like a roll before it is inflated.
One end is temporarily fixed to the outer circumferential surface of the airbag, wound around the outer circumferential surface one turn, and a winding portion including an overlap portion overlapping by winding one or more turns on the outer circumferential surface at the other end; And
Includes; an attachment portion that has approximately the same area as the overlap portion and provides an adhesive force to the upper and lower surfaces, respectively,
The attachment part,
A thin plate-shaped transparent substrate having an area approximately equal to the area of the overlap portion and having a grid pattern printed on an upper surface in contact with the overlap portion,
Double-sided tape is attached to the upper and lower surfaces of the substrate, respectively,
The airbag cover,
The overlapping portion is temporarily attached by the double-sided tape attached to the upper and lower surfaces of the attachment portion, so that the airbag is normally rolled up like a roll,
When the adhesive force of the double-sided tape decreases, at least a portion of the overlapping portion is lifted so that the grid pattern can be visually identified from the outside, indicating a defect.
According to claim 1,
In the overlap portion,
A plurality of incision lines having a length substantially the same as the width of the substrate are formed,
When the adhesive force of the double-sided tape decreases, at least a portion of the overlapping portion is lifted so that the grid pattern can be visually identified from the outside, indicating a defect.
According to claim 1,
The winding part,
Characterized in that consisting of polyethylene terephthalate (PET) nonwoven fabric or polypropylene (PP) nonwoven fabric,
Airbag cover for early failure identification.
According to claim 1,
The winding part,
Characterized in that the thickness is 0.28 to 0.34 mm,
Airbag cover for early failure identification.
According to claim 1,
The winding part,
Characterized in that the tensile strength is 15 to 45 kgf / 5cm,
Airbag cover for early failure identification.

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