JPH0723671U - Airbag device - Google Patents

Abstract

(57) [Summary] [Purpose] To inflate and deploy the airbag faster by deflecting the gas discharge direction when the inflator is activated. [Structure] Storage container 13 having an opening 20 open to the passenger compartment
An inflator 14 and an air bag 15 housed in the container, a plate 25 having a gas discharge hole 28 interposed between the inflator and the air bag, and a fragile portion 24 to open the container. And a cover 21 that closes the plate, and a deflection plate 29 that deflects the discharge direction of the gas discharged from the gas discharge hole toward the cover fragile portion is formed on the plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an airbag device, and more particularly to an airbag device that protects passengers in the front passenger seat and rear seats in the event of a vehicle collision.

[0002]

[Prior art]

 The airbag device for the passenger seat is fitted and stored in a space provided in the instrument panel facing the passenger seat. Conventionally, in this type of airbag device, as disclosed in, for example, Japanese Patent Laid-Open No. 4-306148, a storage container having an opening opened to the vehicle compartment side, and an inflator stored in the storage container. And an airbag and a cover for closing the opening of the storage container. At the time of a vehicle collision, high-pressure gas generated by ignition of the inflator uniformly hits the inner wall surface of the cover, and the gas pressure causes the cover to open and inflate the airbag.

[0003]

[Problems to be solved by the device]

 By the way, the airbag is arranged in the space between the inflator and the cover in the storage container, but this space is usually large in terms of storage workability. For this reason, in the above-mentioned conventional example, there is a risk that the folded state of the airbag collapses in the storage container due to vibration of the vehicle or the like, making it difficult to deploy. Further, since the high-pressure gas is made to hit the inner wall surface of the cover uniformly, there is also a problem that it takes time to expand and deploy the air bag. This is a big problem because the airbag needs to be inflated and deployed in an instant when the vehicle collides.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to prevent the folded state of the airbag from being collapsed and to prevent the airbag from being inflated. It is intended to provide an airbag device capable of inflating and deploying an airbag more quickly and more reliably protecting an occupant.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, an airbag device according to the present invention includes a storage container having an opening that opens toward a vehicle compartment, an inflator and an air bag stored in the storage container, and an inflator having a gas discharge hole. A plate interposed between the air bag and the airbag, and a cover having a fragile portion that closes the opening of the storage container. The discharge direction of the gas discharged from the gas discharge hole is directed toward the cover fragile portion. A deflection plate for deflection is formed on the plate.

[0006]

[Action]

 Since the airbag is placed in the space between the plate and the cover inside the storage container, by folding the airbag tightly in this space, the folded state of the airbag will be maintained even if the vehicle vibrates. It is hard to collapse. Further, when a vehicle collides, gas generated by ignition of the inflator is discharged into the airbag through the gas discharge holes of the plate. At this time, the discharge direction of the gas discharged from the gas discharge holes is deflected toward the fragile portion of the cover by the deflection plate formed on the plate, so that the gas pressure is locally applied to the fragile portion of the cover via the airbag. As a result, the fragile portion of the cover is broken and the airbag is inflated and deployed. In this way, the gas pressure is concentrated on the fragile portion of the cover, so that the rupture of the cover can be accelerated and the airbag can be inflated and deployed quickly.

[0007]

【Example】

 Examples will be described with reference to the drawings. The airbag device according to the present invention is for protecting passengers in the front passenger seat and the rear seat, and FIG. 1 shows the one installed for the front passenger seat. Reference numeral 11 denotes an instrument panel facing the passenger seat. This device may be housed by fitting it into a space formed in the instrument panel 11. In addition, 12 is a windshield.

Reference numeral 13 denotes a storage container that stores a columnar inflator 14 and a folded airbag 15. As shown in FIG. 1, the storage container 13 includes an upper surface wall 16, a lower surface wall 17, a rear surface wall 18, and both side surface walls 19 and 19, and has an opening 20 opened to the vehicle compartment side.

Reference numeral 21 is a cover that closes the opening 20 of the storage container 13. Mounting pieces 22 and 23 are formed at the upper end and the lower end of the cover 21 so as to project therefrom. The attachment pieces 22 and 23 are attached to the upper surface wall 16 and the lower surface wall 17 of the storage container 13, respectively. The desired portion of the cover 21, that is, the mounting piece 23 in the illustrated example, has a groove that is thinned so that the cover 21 can be easily broken and the airbag 15 can be quickly inflated and deployed when the inflator 14 operates. The fragile portion 24 is formed.

Reference numeral 25 is a plate interposed between the rear wall 18 of the storage container 13 and the opening 20. Spaces 26 and 27 are formed on the back wall 18 side and the opening 20 side by the plate 25, respectively. The space 26 stores the inflator 14, and the space 27 stores the air bag 15. Reference numeral 30 is a pressing plate that holds the airbag 15 with the plate 25.

As described above, according to the present invention, since the plate 25 is interposed between the inflator 14 and the airbag 15, the airbag 15 does not come into contact with the inflator 14. Further, by tightly folding the airbag 15 in the space 27, the folded state of the airbag 15 is less likely to collapse even if the vehicle vibrates. Furthermore, since the airbag 15 does not come into direct contact with the inflator 14, the airbag 15 can be used even if it is not heat resistant.

At a portion of the plate 25 near the fragile portion 24, that is, a lower end portion of the plate 25 in the illustrated example, gas discharge holes 28 are formed so that gas generated by ignition of the inflator 14 is discharged to the space 27. Has been formed. As a result, at the time of vehicle collision, gas generated by ignition of the inflator 14 is discharged from the space 26 through the gas discharge holes 28 into the airbag 15 arranged in the space 27. Has become.

At the portion of the plate 25 near the gas discharge hole 28, that is, at the upper portion of the gas discharge hole 28 in the illustrated example, the discharge direction of the gas discharged from the gas discharge hole 28 to the space 27 is toward the fragile portion 24. A deflecting plate 29 for deflecting is formed. Further, since the discharge direction of the gas discharged into the space 27 is deflected by the deflecting plate 29 toward the fragile portion 24, the gas pressure is locally applied to the fragile portion 24 via the airbag 15, and the fragile portion 24 is vulnerable. 24 is broken and the airbag 15 is inflated and deployed.

[0014]

[Effect of device]

 The present invention is configured as described above, and since the inflator and the air bag are partitioned by the plate in the storage container, the airbag can be tightly folded and stored in the storage space. As a result, the airbag is susceptible to the action of high-pressure gas when the inflator is activated, and its deployment can be accelerated, so that the time for inflation and deployment of the airbag can be accelerated. Further, since the gas discharged from the inflator is directed toward the fragile portion of the cover by the deflecting plate formed on the plate, the gas pressure is locally applied to the fragile portion, the cover is easily broken, and the airbag is It has the effect of accelerating the expansion and deployment of.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a plate.

[Explanation of symbols]

 13 Storage Container 14 Inflator 15 Airbag 20 Opening 21 Cover 24 Weak Section 25 Plate 28 Gas Discharge Hole 29 Deflection Plate

Claims (1)

[Scope of utility model registration request] 1. A storage container having an opening opened to a vehicle compartment side, an inflator and an air bag accommodated in the storage container, and a plate having a gas discharge hole and interposed between the inflator and the air bag. And a cover having a fragile portion for closing the opening of the storage container, wherein the plate is formed with a deflection plate for deflecting the discharge direction of the gas discharged from the gas discharge hole toward the cover fragile portion. Airbag device that does.