SRS airbag with two gas layers

Abstract

To address the problems, that is, shocks at the time of binding are great because the pressure of a bag body of an expanded air bag is high when a collision accident causes the air bag to operate, and a danger of brain contusion when an occupant taking a medicine or a supplement containing a component for expediting blood circulation is hit on the head during expansion or by the bag body of the expanded air bag.SOLUTION: A second air bag 2 is provided on the side of a bag body of a conventional air bag with which an occupant comes into contact with, and one or more ventilation ports 3 are provided on the surface of a bag body 1 so as to be connected to the second bag body 2. Thus, even when the first bag body 1 expands maximum, a gas flowing from the first bag body 1 through the ventilation port 3 into the second bag body 2 receives resistance from the ventilation port 3 to delay the increase of pressure. Thus, soft cushioning performance can be provided at the time of binding.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an SRS airbag bag that restrains and protects an occupant during a vehicle collision when the bag is filled with gas and contracts, and relates to an airbag bag that reduces pressure acting on the occupant. [Background technology]

[0002] [Prior art documents] [Patent documents]

[0003] Summary of the Invention Problem to be solved by the invention

[0004] Conventionally, SRS airbags are a common device that ensures the safety of occupants by controlling air pressure during a vehicle collision. However, in the case of a high-speed collision, the high pressure of the airbag during the inflation process can restrain the occupant, causing excessive adverse effects.

[0005] A known method to solve this problem is to use a seat belt with a pretensioner to restrain the occupant and then have the air bag restrain the occupant when the air bag reaches the contraction stage, but due to cost reasons, not all vehicles are equipped with this system.

[0006] There have also been accidents in the past where the airbag module was partially damaged, causing injury to the occupants when they were restrained.

[0007] In addition, passengers who take medications or supplements that contain blood-thinning ingredients may be at risk of developing a cerebral contusion if the head is subjected to strong pressure.

[0008] In the present invention, the bag of the conventional SRS airbag is referred to as the first bag 1 and the internal gas layer as the first gas layer 12, while the bag newly provided on the side of the conventional SRS airbag bag that restrains the occupant is referred to as the second bag 2 and the internal gas layer as the second gas layer 22.

[0009] The first bag 1 and the second bag 2 share a part, and constitute a first gas layer 12 and a second gas layer 22. The shared part of the first bag 1 and the second bag 2 is provided with one or a plurality of vent holes 3 that communicate from the first gas layer 12 to the second gas layer 22.

[0010] In constructing the present invention, a conventional method may be used in which a partition 11 with one or more vent holes 3 is provided inside the bag of an SRS airbag, or a structure may be used in which a second bag 2 is sewn to the outside of the bag of an SRS airbag and one or more vent holes 3 are provided in a partition 11 separating the first bag 1 and the second bag 2. Effects of the Invention

[0011] In the present invention, the SRS airbag maintains conventional performance, and when gas passes through one or more vents 3 provided in the partition 11 between the first bag body 1 and the second bag body 2, resistance is encountered and the amount of gas flowing in is restricted, thereby maintaining a low pressure in the second bag body 2 on the side restraining the occupant. Therefore, it is possible to restrain the occupant at a low pressure without compromising conventional performance, and improve cushioning performance.

[0012] When restrained, the occupant is restrained by the low-pressure second bag 2 and cushioned by the first bag 1, which functions similarly to the bag of a normal SRS airbag. In this case, the gas that has flowed into the second bag 2 flows back through the ventilation hole 3, making it possible to restrain the occupant at a low pressure.

[0013] In addition, it is possible to increase the speed of the entire process of deployment, from inflation to contraction of the bag, thereby improving performance.

[0014] Problems that arise from increasing the deployment speed include accidents due to partial breakage of the airbag module, which has been the subject of accidents in the past, but this risk is reduced by blocking it with the partition 11 that separates the two air layers.

[0015] The present invention is also applicable to side airbags that do not have seat belt support. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a cross-sectional view of the airbag when the bag body is deployed. [Explanation of symbols]

[0017] 1 First bag body 2 Second bag body 3. Ventilation hole 11 Partition 12 First gas layer 22 Second gas layer

Claims

[Claim 1] The present invention is characterized in that the first bag (1) forms a first gas layer (12) and the second bag (2) forms a second gas layer, and the gas layer is formed only by two gas layers. The first bag body and the second bag body are formed by dividing one bag body by a partition portion (11), A vent hole (3) is provided at least in the center of the partition, which provides a flow resistance to gas when passing through. SRS airbag bag body.

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