JPH04345558A - Air bag inflating gas generating device - Google Patents

Abstract

PURPOSE:To dissolve restriction of position, size, and the like of an orifice due to the combined part of the cup and the cap of a closed vessel by arranging the bottom part of the cup of the closed vessel on an igniter side, and forming a recessed part to receive an igniter on the bottom of the cup. CONSTITUTION:A recessed part 51 sunk on the through hole 45 side of gas generating agent 43 is formed on the center of a closed vessel 49, and an igniter 53 for combustion of the gas generating agent 43 is arranged in the recessed part 51. A combustion chamber filter 55 is arranged along the inner circumference of a combustion chamber 41, and a gas charging chamber 57 to which gas passing through the combustion chamber filter 55 is let flow through the orifice 56 of a partition member 58 is ring-likely arranged around the combustion chamber 41. Restriction as to the position, size, and the like of the orifice 56 due to the combined part 69 of the cup 65 and the cap 67 of the closed vessel 49 can be surely dissolved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag deployment gas generator used to deploy air bags for collision safety devices, life bags, rubber boats, escape chutes, etc. using combustion gas.

0002

BACKGROUND OF THE INVENTION Conventionally, collision safety devices for passenger cars to protect drivers from shocks in the event of a collision include, for example, an airbag with a capacity of 60 liters and a device for deploying the airbag using gas. It consists of a gas generator for deploying an airbag, and in the event of a collision of a passenger car, explosives filled in the gas generator for deploying the airbag,
Alternatively, a gas generating agent made of a similar composition is ignited and burned, and the generated gas instantly deploys an airbag to protect the driver from a collision and prevent serious injury to the driver. .

FIG. 3 shows this type of gas generating device for deploying an airbag. In the figure, reference numeral 11 indicates a combustion chamber in which a plurality of gas generating agents 13 are accommodated in a stacked state. The gas generating agent 13 has an annular plate shape with a through hole 15 formed in the center.
is accommodated.

These gas generating agents 13 are stored in a sealed container 19.
A recess 21 is formed in the center of the sealed container 19 and is recessed toward the through hole 15 side of the gas generating agent 13 . An igniter 23 for burning the gas generating agent 13 is arranged in this recess 21 .

A combustion chamber filter 25 is disposed along the inner periphery of the combustion chamber 11, and a filling chamber 27 surrounds the combustion chamber 11 and into which the gas that has passed through the combustion chamber filter 25 flows through an orifice 26. are arranged in a ring. Inside the air chamber 27, an air chamber filter consisting of an upper filter 29 and a gas filtration filter 31 is housed.

[0006] Furthermore, a gas outlet 33 is formed in the air filling chamber 27 for allowing the gas that has passed through the gas filtration filter 31 to flow out to the air bag. In such an airbag deployment gas generator, when electricity is applied to the igniter 23, the igniter 17 is combusted by combustion of the gunpowder in the igniter 23, and this combustion causes the gas generating agent 13 to be combusted. After the gas from the gas generating agent 13 passes through the combustion chamber filter 25 arranged along the inner periphery of the combustion chamber 11 and flows into the filling chamber 27, it is purified by the upper filter 29 and the gas filtration filter 31. The gas flows into the airbag through the gas outlet 33, and the airbag is fully inflated in a short time of, for example, about 0.04 seconds.

[0007]

[Problems to be Solved by the Invention] However, in such a gas generating device for deploying an air bag, the gas generating agent 1
3 is formed by wrapping the cap 37 around the cup 35, so that the joint 38 between the cup 35 and the cap 37 is located on the side of the orifice 26 formed in the partition member 39. There was a problem in that the position and size of the orifice 26 were restricted.

[0008] The present invention solves the above-mentioned problems, and can reliably eliminate restrictions on the position, size, etc. of the orifice caused by the coupling portion between the cup and the cap of the sealed container. The purpose of the present invention is to provide a gas generator for deploying an airbag.

[0009]

[Means for Solving the Problems] The gas generating device for airbag deployment of the present invention surrounds a combustion chamber on one side of which an igniter is disposed to form a charging chamber, and also connects the combustion chamber with the charging chamber. An orifice communicating the combustion chamber and the filling chamber is formed on the igniter side of a cylindrical partition member that partitions the combustion chamber, and the cup further includes a cup in which a gas generating agent is housed in the combustion chamber; A gas generator for airbag deployment comprising a sealed container including a cap that seals an opening of the cup, wherein the bottom of the cup is placed on the igniter side, and the igniter is housed in the bottom of the cup. It is formed by forming a recessed part.

0010

[Operation] In the gas generator for airbag deployment of the present invention,
The bottom of the cup is placed on the igniter side, and the igniter is housed in a recess formed in the bottom of the cup.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be explained with reference to embodiments shown in the drawings. FIG. 1 shows an embodiment of the gas generator for deploying an airbag according to the present invention, and in the figure, reference numeral 41
shows a combustion chamber in which a plurality of gas generating agents 43 are accommodated in a stacked state.

The gas generating agent 43 has an annular plate shape with a through hole 45 formed in the center, and an ignition charge 47 is accommodated in the through hole 45 . These gas generating agents 43 are
The gas generating agent 43 is housed in a sealed container 49, and in the center of the sealed container 49, a recess 51 is formed which is depressed toward the through hole 45 side of the gas generating agent 43.

An igniter 53 for burning the gas generating agent 43 is disposed in the recess 51. A combustion chamber filter 55 is disposed along the inner periphery of the combustion chamber 41, and a plenum chamber surrounds the combustion chamber 41 and allows the gas that has passed through the combustion chamber filter 55 to flow into it from an orifice 56 of a partition member 58. 57 are arranged in a ring.

[0014] Inside the air filling chamber 57, an air filling chamber filter consisting of an upper filter 59 and a gas filtration filter 61 is accommodated. Furthermore, a gas outlet 63 is formed in the air filling chamber 57 to allow the gas that has passed through the gas filtration filter 61 to flow out into the airbag. In this embodiment, the sealed container 49 is constructed by wrapping a cap 67 made of aluminum around the opening of a cup 65 made of aluminum, as shown in FIG.
A joint portion 69 is formed along the outer periphery.

The bottom 71 of the cup 65 is placed on the igniter 53 side, and a recess 51 for accommodating the igniter 53 is formed in the center of the bottom 71 of the cup 65. Note that the reference numeral 73 indicates an ignition powder pack for accommodating the ignition powder 47. In the airbag deployment gas generator configured as described above, when electricity is supplied to the igniter 53, the igniter 47 is caused by combustion of the gunpowder in the igniter 53.
is combusted, and as a result of this combustion, the portion of the sealed container 49 on the side of the orifice 56 is ruptured, the gas generating agent 43 is combusted, and the gas from this gas generating agent 43 is distributed along the inner periphery of the combustion chamber 41. It passes through the combustion chamber filter 49 arranged and enters the charging chamber 5.
7, the gas is purified by the upper filter 59 and the gas filtration filter 61, flows into the airbag through the gas outlet 63, and the airbag is fully inflated in a short period of, for example, about 0.04 seconds. Ru.

In the airbag deployment gas generator configured as described above, the cup 6 of the sealed container 49
5 is placed on the igniter 53 side, and this cup 65
Since the recess 51 for accommodating the igniter 53 is formed in the bottom 71 of the container, it is ensured that the joint 69 between the cup 65 and the cap 67 of the sealed container 49 imposes restrictions on the position, size, etc. of the orifice 56. It can be resolved.

That is, in the airbag deployment gas generator configured as described above, the bottom 71 of the cup 65 is disposed on the igniter 53 side, and the bottom 71 of the cup 53 is located on the igniter 53 side.
Since the igniter 53 is accommodated in the recess 51 formed in the
The orifice 56 formed in the partition member 58 is located on the side of the bottom 71 of the cup 65.
It becomes possible to reliably eliminate the influence of the coupling portion 69 on the coupling portion 69.

Furthermore, since the orifice 56 opens on the side of the bottom 71 of the cup 65, which has relatively stable strength, the sealed container 49 can be reliably ruptured at a predetermined pressure.

[0019]

[Effects of the Invention] As described above, in the gas generator for deploying an airbag according to the present invention, the bottom of the cup is placed on the igniter side, and a recess for accommodating the igniter is formed in the bottom of the cup. , there is an advantage in that the connection between the cup and the cap of the sealed container can reliably eliminate restrictions on the position, size, etc. of the orifice.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of an airbag deployment gas generator according to the present invention.

FIG. 2 is a sectional view showing the sealed container of FIG. 1.

FIG. 3 is a sectional view showing a conventional airbag deployment gas generator.

[Explanation of symbols]

41 Combustion chamber 43 Gas generating agent 49 Sealed container 51 Recessed part 53 Igniter 56 Orifice 57　Charge chamber 58 Partition member 65 cup 67 Cap 71 Bottom

Claims (1)

[Claims] 1. A cylindrical partition member that surrounds a combustion chamber in which an igniter is disposed on one side to form a filling chamber, and partitions the combustion chamber and the filling chamber, on the side of the igniter. An orifice communicating the combustion chamber and the filling chamber is formed, and a sealed container comprising a cup containing a gas generating agent and a cap sealing an opening of the cup is disposed within the combustion chamber. In the airbag deployment gas generator,
A gas generating device for deploying an air bag, characterized in that a bottom portion of the cup is disposed on the igniter side, and a recessed portion for accommodating the igniter is formed in the bottom portion of the cup.