JPH0511094Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an exhaust port reinforcement structure for a vehicle airbag.

(Prior art) Airbags for vehicles have a gas generator placed in the center of the handle, the gas outlet of which is covered with a folded airbag, and the outside of the bag is covered with a cover.In the event of an emergency, the gas generator is activated and the airbag is placed inside the bag. Gas is supplied to expand and inflate the bag in its folded state to alleviate the frontal collision of the occupant's chest and head; in this case, the cover is constructed so that it ruptures when the bag expands.

By the way, the air bag mentioned above is equipped with an inlet for introducing the gas from the generator and an exhaust port to release the pressure inside the bag and relieve the pressure when the passenger collides with the expanded bag. The diameter and opening area are set to the extent necessary to mitigate collisions with the air bag, and the exhaust port is subject to great pressure, so it must be reinforced.

(Problem that the invention aims to solve) The conventional reinforcement structure for the airbag exhaust port is performed separately from the reinforcement of the gas supply port of the generator, and involves sewing and polymerizing cloth to surround the exhaust port. . In the conventional structure, the reinforcement around the gas supply port and the reinforcement around the exhaust port are performed separately by sewing and polymerizing fabrics, etc., which requires a large number of steps, making the manufacturing process troublesome and complicated, and disadvantageous in terms of cost. In particular, since a plurality of exhaust ports, for example two, are provided, sewing work is required at three locations, and it is laborious to sew overlapping small pieces of cloth around the small diameter exhaust ports. And the exhaust ports are mutually independent,
Since the airbags are individually reinforced, when the airbags are folded, the fabric around the reinforced portions is softer than the reinforced portions, resulting in poor shape retention and difficulty in retaining the shape of the exhaust port.

The present invention has been made to solve the above problems, and its purpose is to strengthen the exhaust port of an air bag in an advantageous way in manufacturing the air bag, to simplify the manufacturing of the air bag, and to enhance the reinforcing effect. The purpose is to enhance the shape retention of the exhaust port shape and improve functionality.

(Means for solving the problem) The means for solving the above problem includes an opening that receives gas supply from a generator that is activated in an emergency and introduces gas into the air bag.
An air bag for a vehicle is provided with an exhaust port for discharging the pressure inside the air bag around the opening, wherein the gas supply opening of the air bag is provided on at least one of the front and back surfaces around the exhaust port. This is because a single-layer reinforcing piece that surrounds and surrounds the exhaust port is polymerized and integrated.

(Effects of the above means) According to the above means, the gas supply opening and the exhaust port are reinforced with a continuous piece of cloth, etc., and the sewing of the reinforcing cloth etc. is commonly done with one piece. The reinforcing cloth for the exhaust port is continuous with the reinforcing cloth for the gas supply opening, so the shape retention around the exhaust port is good when folded.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a vertical cross-sectional view of the main part of the air bag device.
1 is a retainer that forms a mounting base for an air bag that is mounted and supported on a support base that forms a spoke part of a handle; an opening 101 is formed in the center of the retainer 1; a gas generator 2 is fitted and fixed in the opening 101; The peripheral portion 102 of the opening 101 of the retainer 1 is fitted onto the portion 201 from above. The retainer 1 has a concave dish shape, and the supply part 202 on the flange part 201 of the generator 2 protrudes above the opening 101. The retaining ring 4 is stacked on the peripheral part 302, the bag 3 is tied to the retainer 1 side via the rivet 5, the retainer 1 is covered with the cover 8, and the air bag is placed in the space S formed by the retainer 1 and the cover 8. Fold and store 3.

The airbag 3 is as shown in Figures 2 and 3.
FIG. 2 is a cross-sectional view of the bag in its unfolded state, with an opening 301 forming a supply port in the center of the bag body 303 in the shape of a circular bag.
is formed, into which the supply part 202 of the gas generator 2 is fitted, and on the upper surface (inner surface of the bag) of the peripheral part 302 of the opening 301 is a first reinforcing cloth piece in the form of an annular disk having a predetermined length in the radial direction. 6 to the opening 30
1 is sewn and polymerized into one piece surrounding 1, and expressed as a piece of cloth as a reinforcing member, but materials that are easy to bend and have high strength such as organic fibers, inorganic fibers, and even fine mesh metal fibers are used. .

On the other hand, an exhaust port 304 is formed radially outward in the periphery of the opening 301 of the air bag 3. In the embodiment, two exhaust ports 304 are provided on the left and right sides, and the air bag 3 is connected to the exhaust port 304.
04, 304, a reinforcing second cloth piece 7 is arranged on the back side of the part provided with the opening 301 (the outer surface of the bottom of the bag), and this cloth piece 7 is attached to the above-mentioned first cloth piece 6 around the opening 301. Surrounding and exhaust ports 304, 30
It has a size of a single piece so as to reach and surround the periphery of the second cloth piece 4, and the second cloth piece 7 is overlapped from the back side and sewn or otherwise integrated. The second cloth piece 7 is similar to the first cloth piece 6. As a result, the exhaust ports 304, 3
04 is the second opening 301 in the center from the back side.
The opening 301 is reinforced by the first cloth piece 6.
and second cloth piece 7 from the front and back. Opening 3 reinforced with such front and back cloth pieces 6 and 7
A plurality of mounting holes 305 are formed radially in the peripheral portion 302 of 01 so as to surround the opening 301, and are fastened to the retainer via a ring using the previously described rivets 5. FIG. 3 shows a cross section of the above reinforced portion.

(Effects of the invention) As is clear from the above, according to the invention, the backing reinforcing piece around the exhaust port is integrally continuous with the backing reinforcing piece around the opening, so the reinforcing pieces can be joined together by sewing, etc. The work only requires one piece of cloth, which simplifies the production of airbags as opposed to sewing them individually as in the past, and the reinforcing piece around the exhaust port is integrated with the reinforcing piece around the central opening. Therefore, the strength and bending characteristics when folded are the same, and the reinforcing piece around the exhaust port has less wrinkles and deformation compared to the conventional single-piece structure of the air bag body, improving shape retention around the exhaust port. However, it also has advantages such as superior functionality of the exhaust port.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical cross-sectional side view of the main parts of the air bag device, Fig. 2 is a cross-sectional plan view of the air bag in its deployed state, and Fig. 3 is a cross-sectional view of the air bag in its deployed state. FIG. In the drawings, 2 is a generator, 3 is an air bag, 301 is an opening, 304 is an exhaust port, and 7 is a reinforcing piece.

Claims (1)

[Scope of utility model registration request] In the air bag for a vehicle, the air bag is provided with an opening for receiving gas supply from a generator activated in an emergency and introducing gas into the air bag, and an exhaust port for discharging the pressure inside the air bag around the opening. A reinforcing piece having a single-layer structure is polymerized and integrated on at least one of the front and back surfaces around the gas supply opening and the exhaust port of the airbag, which surrounds the gas supply opening of the air bag and reaches and surrounds the peripheral part of the exhaust port. The airbag's exhaust port reinforcement structure is characterized by: