JP2985928B2 - Airbag body of airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag body of an airbag device for protecting an occupant in the event of a collision of a vehicle or the like.
More specifically, the present invention relates to an airbag body of an airbag device adapted to be inflated when a gas generator is actuated, wherein the airbag body is formed by sewing an edge of one base cloth by sewing. The present invention relates to an airbag body of an airbag device formed in a bag shape.

[0002]

2. Description of the Related Art Conventionally, an airbag device has been known as a device for protecting an occupant of a vehicle or the like. This airbag device is disclosed in Japanese Utility Model Laid-Open No. 2-123445,
43747, Japanese Utility Model Laid-Open No. 5-71063, JP-A-5-16751, JP-A-6-1188,
JP-A-3-248945 and the like exist.

[0003] A suspension belt, strap or tether for shape control is attached to the airbag body of the conventional airbag device. For example, the suspension belt prevents the airbag body from expanding in one direction, such as the occupant's face, when the gas generator is activated. A conventional suspension belt of an airbag body is sewn to a front fabric or a rear fabric via a belt catch or the like.

[0004]

When a suspension belt, strap, or tether for shape control is provided on an airbag body of a conventional airbag device, the suspension belt, strap, or tether is provided separately from the airbag body. And these are joined by sewing.Because a suspension belt, strap, or tether is located inside the airbag body, sewing work is complicated and workability is poor, and component costs increase. The economy was lacking.

An object of the present invention is to form a strap for regulating the shape of the airbag body integrally with the airbag body, to reliably regulate the shape of the airbag body, and to simplify the work of sewing the airbag body and the strap. Another object of the present invention is to provide an airbag body of an airbag device which can reduce costs by reducing the number of parts, improve economy, and is excellent in safety.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an airbag body of an airbag device according to the first aspect of the present invention expands when a gas generator is operated. In the airbag body of the airbag device made as described above, the airbag body is formed in a bag shape from one piece of base cloth, and the end of the one piece of base cloth is formed narrow,
An opening for gas ejection is formed in the center portion side, and a gas ejection opening of a size corresponding to the gas ejection opening on the center portion side is formed at an end of the base cloth, and the end of the base cloth is formed into a bag shape. Positioning the inside of the formed airbag body, aligning and fixing the gas ejection opening formed at the end of the base fabric with the gas ejection opening on the central portion side of the base fabric, and fixing the end of the base fabric. The part is formed on a strap for shape regulation.

[0007]

According to the airbag body of the airbag device according to the first aspect of the present invention, the airbag body is formed in a bag shape from a single base cloth, and the end of the single base cloth has a width. A gas ejection opening is formed at the center portion side, and a gas ejection opening having a size corresponding to the gas ejection opening at the center portion is formed at an end of the base cloth. The part is positioned inside the airbag body formed in a bag shape, and the gas ejection opening formed at the end of the base cloth is aligned with and fixed to the gas ejection opening at the center part side of the base cloth, Since the end of the base cloth is formed on the shape-regulating strap, there is no need to separately form a shape-regulating strap, and the work of sewing the strap to the airbag body can be omitted, and the sewing can be performed. Work can be performed simply and quickly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An airbag body of an airbag device according to the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 schematically show one embodiment of an airbag body of an airbag device according to the present invention. In the airbag device 11, a fixed side on which a base plate 12 is mounted is a door 10 side. Is shown, it can be on the instrument panel side or the steering side, and it is attached to an appropriate position such as the back of the seat back.

As shown in FIG. 7, the airbag device 11 has a gas generator 13 fixed to a base plate 12 by fixing members 14 such as bolts and nuts. The airbag body 21 is fixed to the base plate 12 by a fixing member 18 such as a bolt or a nut via a retainer 16 similarly to the gas generator 13.

As shown in FIG. 3, an airbag body 21 of the airbag apparatus 11 is formed in a bag shape from a single base cloth 23, and an end 23a of the base cloth 23 is formed on a strap 25 for shape control. ing. In this embodiment, the case where the strap 25 is formed at both ends 23a, 23a in the longitudinal direction of the base cloth 23 will be described, but either one may be used.

An opening 27 for gas ejection is formed substantially at the center of the base cloth 23, and a small hole 28 for bolt insertion is formed along the outer periphery of the opening 27 for gas ejection. The end 23a of the base cloth 23 is formed to be narrow, and the end 23a
Is provided with a small hole 29 for location.

As shown in FIG. 4, the base cloth 23 is folded in two substantially at the center, and both ends 23 in the longitudinal direction of the base cloth 23 are formed.
a and 23a are overlapped to form a first bag for forming a bag.
Is formed. The first sewn portion 31 is formed at a wider portion inside the narrow portions of both end portions 23a, 23a. Both ends 23a, 23a outside the first sewing portion 31 are formed on the strap 25.

Next, as shown in FIG.
A gas ejection opening 33 having a size corresponding to the gas ejection opening 27 on the central portion side is formed in a narrow portion of both end portions 23a, 23a outside of 1. It should be noted that the gas ejection opening 27 on the central portion side can be formed simultaneously with the formation of the gas ejection opening 33.

A small hole 35 for inserting a bolt is formed along the outer periphery of the gas ejection opening 33 simultaneously with the formation of the gas ejection opening 33. Also, the communication holes 37 are formed in the strap 25 so as not to obstruct the flow of gas from the gas generator 13.
Are formed in an appropriate size.

It is also possible to sew a reinforcing cloth separately formed in the gas ejection opening 27 on the central portion side. A sewing portion 39 is formed along the gas ejection opening 33 formed at the end 23 a of the base cloth 23. Further, in FIGS. 3 and 4, the end 23a of the base cloth 23 is formed symmetrically in the left-right direction with substantially the same shape, but may be left-right asymmetric as shown in FIG.

Next, as shown in FIG. 6, the gas ejection opening 27 of the base cloth 23 is located at the center of the back surface, the first sewing portion 31 is located at the center of the front surface, and the second sewing portions are provided at both upper and lower ends. By forming 41, the bag-like portion 21a of the airbag body 21 is formed.

Next, the bag-like portion 21 of the airbag body 21
By turning a over using the gas ejection opening 27 on the central portion side, the strap 25 can be inserted into the bag-like portion 21a as shown in FIGS.

Next, the gas ejection opening 33 formed at the end 23a of the base cloth 23 is aligned with the gas ejection opening 27 at the center of the base cloth 23, and the bag-like portion 21a of the airbag body 21 and the strap are formed. 25 is fixed to the base plate 12 by the retainer 16 and the fixing member 18. Further, the gas generator 13 is fixed.

Since the end 23a of the base cloth 23 is formed on the strap 25 for regulating the shape, it is not necessary to separately form the strap 25 for regulating the shape.
5 can be omitted from the bag-shaped portion 21a of the airbag body 21, and the sewing operation can be performed simply and quickly.

[0020]

The above is the configuration of one embodiment of the airbag body of the airbag apparatus according to the present invention. According to the airbag body of the airbag apparatus according to claim 1 of the present invention, The main body is formed in a bag shape from one piece of base cloth,
An end portion of the one base cloth is formed to be narrow, a gas ejection opening is formed at a central portion side, and a gas ejection opening having a size corresponding to the gas ejection opening at the central portion side is provided. The end of the base cloth is positioned inside the bag-shaped airbag body, and the gas formed at the end of the base cloth is formed at the gas ejection opening at the center of the base cloth. The ejection opening is aligned and fixed, and the end of the base cloth is formed on a shape-regulating strap. Therefore, there is no need to separately form a shape-regulating strap, and the strap is sewn to the airbag body. Can be omitted, and the sewing operation can be performed simply and quickly.

According to the present invention, the strap for regulating the shape of the airbag body is formed integrally with the airbag body, the shape of the airbag body can be reliably regulated, and the sewing work of the airbag body and the strap is simplified. In addition, it is possible to reduce the number of parts, thereby reducing costs, improving economic efficiency, and obtaining an airbag body of an airbag device that is excellent in safety.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of an airbag body of an airbag device according to the present invention.

FIG. 2 is a sectional view showing a state in which the airbag device according to the present invention is incorporated in a vehicle.

FIG. 3 is a plan view of a base fabric of the airbag body according to the present invention.

FIG. 4 is a plan view showing a state in which a base fabric of the airbag body according to the present invention is folded in two to form a first sewing portion.

FIG. 5 is a plan view showing a state in which a base fabric of the airbag body according to the present invention is folded in two, and a gas ejection opening is formed at an end.

FIG. 6 is a plan view showing a state in which the base fabric of the airbag body according to the present invention is folded in two, the ends are moved to the center, and second sewn portions are formed vertically.

FIG. 7 is a sectional view taken along the line XX of FIG. 1;

FIG. 8 is a sectional view in the YY direction of FIG. 1;

[Explanation of symbols]

 Reference Signs List 10 door 11 airbag device 12 base plate 13 gas generator 14 fixing member 16 retainer 18 fixing member 21 airbag body 21a bag-like portion 23 base cloth 23a end portion 25 strap 27 gas ejection opening 28 small hole 31 first sewing portion 33 gas ejection opening 39 sewing part 41 second sewing part

Claims (1)

(57) [Claims] 1. An airbag body of an airbag device adapted to inflate when a gas generator is actuated, wherein said airbag body is formed in a bag shape from one piece of base cloth, and said one piece of base cloth is provided. The end of the base cloth is formed to be narrow, a gas ejection opening is formed at the center part side, and a gas ejection opening of a size corresponding to the gas ejection opening at the center part side is formed at an end of the base cloth. The end of the base cloth is positioned inside the airbag body formed in a bag shape, and the gas discharge opening formed at the end of the base cloth is aligned with the gas discharge opening on the central part side of the base cloth. The airbag body of the airbag device, wherein an end of the base cloth is formed on a strap for regulating the shape.