JPH063755U - Airbag - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the scratches on the occupant when inflated and to ensure the restraint protection even with a bag whose outer peripheral edge is exposed together with seams. [Structure] The outer peripheral edge portion 2 which is sewn along the circumferential direction and is kept protruding to the outside is formed with a resin film 4 together with seams.
An airbag that is covered with cloth or has flocked 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an airbag having an improved occupant restraint protection function in the event of a collision.

[0002]

[Prior art]

 As shown in FIG. 4, the airbag B is attached to the central portion of the steering wheel S of the automobile, and when the automobile collides, it is inflated rapidly by injecting pressure gas, and the head and chest of the occupant D are inflated. I try to restrain and protect such things. Such an airbag is made by sewing the outer peripheral edges of two overlapping circular base fabrics into a bag along the circumferential direction, but at this time, the outer peripheral edges are turned upside down. There are cases where the bag is folded inside the bag and cases where the bag is left exposed outside the bag without such inversion.

In any of the cases, when the airbag is inflated and actuated, the seams and the outer peripheral edge of the driver's arm or the occupant in the front passenger seat are caught by the seam and the outer peripheral edge of the handle, which causes resistance to the airbag. May affect deployment. Also, when the airbag folded in the center of the steering wheel or inside the instrument panel is inflated rapidly, the seams and the outer peripheral edge may touch the human body at high speed, which may cause secondary damage such as scratches. There is also a possibility.

[0004]

[Problems to be solved by the device]

 The object of the present invention is to more reliably protect the occupant's chest and abdomen even when the bag is such that the outer peripheral edge is exposed together with the seam, and reduces scratches to the human body when inflated. To provide an airbag that does so.

[0005]

[Means for Solving the Problems]

 The present invention that achieves the above object is to sew an outer peripheral edge portion of two circular base fabrics to a bag body along a circumferential direction with a sewing thread and invert the outer peripheral edge portion to the inside of the bag body. In an airbag that is left to protrude outward, at least one outer surface of the outer peripheral edge portion is covered with a resin film or cloth together with the seam of the sewn portion, or is resin-coated. To do. Further, another structure is characterized in that at least one outer surface of the outer peripheral edge portion is covered with flocked hair.

By covering the outer peripheral edge portion with the resin film or cloth including the seam or coating the outer peripheral edge portion with the resin as described above, the frictional resistance due to the seam and the outer peripheral edge is reduced, and the occupant when the airbag is inflated. It is possible to reduce the possibility of getting caught in the arm of the person. Also, the possibility of seams scratching the human body is reduced. Such an effect can be similarly obtained when the hair is covered with flocked hair.

Hereinafter, a specific description will be given with reference to the embodiments shown in the drawings. FIG. 1 is an enlarged view of the vicinity of the outer peripheral edge portion of the airbag according to the present invention. The airbag B is folded in two with two circular base cloths 1 and 1 overlapped and the outer peripheral edge portion 2 thereof overlapped, and a sewing thread 3 is formed into a bag along the circumferential direction. It is sewn. That is, the outer peripheral edge portion 2 is in a state in which the inside and outside of the airbag B are not folded by inverting the inside and outside of the bag, but are directly projected to the outside. A resin film 4 is adhered to the outer surface of the outer peripheral edge portion 2 so as to cover the seam formed by the sewing thread 3. The resin film 4 covers the outer peripheral portion of the circular base cloth 1 in an annular shape.

Since the seam of the sewing thread 3 is thus covered with the resin film 4, the frictional resistance when the seam comes into contact with an external object is reduced, and when the airbag B is deployed, the occupant's arm, etc. It is possible to reduce the possibility of being hindered from bulging downward due to being caught on the body or scratching the human body. Further, in the case of being covered with the non-breathable resin film 4 as in this embodiment, the inflation gas inside the airbag does not leak from the sewn portion, so that the gas also causes a secondary injury such as a burn. It can be prevented.

As the resin film 4 described above, a film formed in advance may be attached, or a liquid resin melted or dissolved in a solvent may be directly coated and solidified and molded. Further, instead of the resin film, a cloth may be attached. Further, as shown in FIG. 2, the resin film 4 and the cloth do not necessarily have to cover both front and rear surfaces of the outer peripheral edge portion 2, and when the arrow F direction is the driver's seat side, the driver's seat side or the opposite side. You may provide so that only one may be covered. At this time, the resin film 4 or the cloth preferably has an annular shape, and the edge portion on the outer peripheral side is preferably extended slightly outside the outer peripheral edge portion 2 of the airbag B. Further, the resin film 4 and the cloth may be adhered to the circular base cloth 1 on the surface A on the inner peripheral side thereof, and may be simply covered on the outer peripheral edge portion 2. No need.

FIG. 3 shows another embodiment of the present invention. In this embodiment, instead of the resin film or the cloth in the above embodiment, the flocked hair 5 having a length higher than the protruding height of the seam of the sewing thread 3 is applied. As such flocked hair 5, short fibers may be directly flocked, or a flocked sheet may be attached. Even when the bristles 5 are provided in this way, the bristles 5 cover the seams to reduce the frictional resistance due to the seams and the outer peripheral edge, so that when the airbag B is inflated, it is caught on the occupant's arm or the like. It also reduces the possibility of strong abrasions.

[0011]

[Effect of device]

 As described above, the airbag of the present invention reduces the possibility that the seams and the outer peripheral edge are caught on the occupant's arm or the like when the airbag is rapidly inflated, and the inflation of the occupant to the lower side becomes more reliable. It is possible to improve the restraint protection not only for the head but also for the chest and abdomen. In addition, the possibility of scratching the occupant is reduced, and higher safety can be guaranteed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the vicinity of an outer peripheral edge portion of an airbag according to the present invention.

FIG. 2 is a sectional view showing the vicinity of an outer peripheral edge portion of an airbag according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the vicinity of an outer peripheral edge portion of an airbag according to still another embodiment of the present invention.

FIG. 4 is an operation explanatory view of the airbag attached to the automobile.

[Explanation of symbols]

1 circular base cloth 2 outer peripheral edge 3
Sewing thread 4 Resin film 5 Flocking B
Airbag

Claims (2)

[Scope of utility model registration request] 1. An outer peripheral edge portion of two circular base fabrics sewn on a bag body along a circumferential direction with a sewing thread, and the outer peripheral edge portion is projected to the outside without being inverted to the inside of the bag body. In the airbag to be left as it is, at least one outer surface of the outer peripheral edge portion is covered with a resin film or a cloth together with a seam of a sewn portion, or the resin is coated. 2. An outer peripheral edge portion of two circular base cloths laid on each other is sewn into a bag body by a sewing thread along a circumferential direction, and the outer peripheral edge portion is projected to the outside without being inverted to the inside of the bag body. An airbag to be left as it is, wherein at least one outer surface of the outer peripheral edge portion is covered with flocked hair.