JP2886618B2 - How to hold the detonator of the gas generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention senses an impact caused by an automobile collision accident or the like, and is a component of a safety device which is designed not to apply an impact force directly to a driver and a passenger. And a detonator holding means of the gas generator.

[Conventional technology]

A gas generator is an important component used in an airbag system of a vehicle, and instantaneously burns a gas generating agent and supplies nitrogen gas to an inflatable bag.

As shown in FIG. 1, the gas generator ignites the outer shell 1, the primer 2, the transfer agent 3, the gas generator 4, the fixing member 5, the coolant 6, the first moisture-proof member 7, the second moisture-proof member 8, and the primer. Device 9 (hereinafter, referred to as a sensor) used for this purpose.

In the prior art, the primer 2 is inserted into a recess provided in the gas generator as shown in FIG. 2 and bonded or caulked 10 via a fixing member 5 such as a ring-shaped plate (in FIG. 2, caulking is used).
Was fixed at. In addition, since moisture invades along the path indicated by the arrow in FIG. 1, the first dehumidifying member 7 and the second dehumidifying member 8 protect the detonator 2 from moisture.

[Problems to be solved by the invention]

In the prior art, it was not possible to stably fix the primer or to minimize the gap with another member unless the processing accuracy of the concave portion was increased. In addition, a second separate member having a moisture-proof function was required for moisture-proofing the primer.

[Means for solving the problem]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.

That is, the present invention inserts an elastic member partially covering the primer with a gas generator in which the primer and a sensor for igniting the primer are adjacent to the gas generator, and fixes the primer,
It is another object of the present invention to provide a method for holding a detonator of a gas generator, wherein the detonation of the detonator is performed by using a part of the sensor.

As the elastic member used in the present invention, any material can be used as long as it fills the gap generated when the primer is inserted into the concave portion of the gas generator, and examples thereof include a rubber member. Further, the elastic member protrudes toward the sensor, and when the sensor is assembled, the upper end surface of the sensor comes into contact with the protrusion of the elastic member, so that the detonation of the primer is performed.

〔Example〕

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

As shown in FIG. 3, an elastic member having an interference with the outer diameter of the primer and the concave portion of the gas generator main body was used.

The primer 2 was inserted into the recess of the gas generator, the elastic member 11 was inserted into the gap between the primer and the recess of the gas generator, and the primer was fixed.

One end surface (on the sensor side) of the elastic member 11 forms a convex ring, and when the sensor is assembled, it is crushed to have a dimensional configuration satisfying the moisture-proof (airtight) function.

〔The invention's effect〕

According to the method of the present invention, the primer can be easily and reliably fixed regardless of the processing accuracy of the concave portion.

Further, according to the method of the present invention, the moisture proof effect of the primer is improved, and the number of parts can be reduced, which can contribute to cost reduction.

[Brief description of the drawings]

1 is a sectional view of a conventional gas generator, FIG. 2 is a sectional view of a primer fixing portion of the conventional gas generator, and FIG. 3 is a sectional view of a primer section fixed according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Outer container, 2 ... Primer 3 ... Explosive, 4 ... Gas generating agent 5 ... Fixing member, 6 ... Coolant 7 ... First moisture proof member, 8 ... Second moisture proof member 9 ... Sensor, 10 ... Caulking 11 ... Elastic member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60R 21/26 B60R 21/32 F42B 3/00 C06C 7/00 B01J 7/00

Claims (1)

(57) [Claims] 1. A detonator and a sensor for igniting the detonator are attached to the detonator in the adjacent gas generator. When the detonator is inserted into the recess of the gas generator while partially covering the detonator. An elastic member that fills the gap and protrudes toward the sensor is inserted into the recess of the gas generator to fix the primer, and when the sensor is assembled, the upper end face of the sensor and the protrusion of the elastic member A method for holding a detonator of a gas generator, wherein the detonation of the detonator is performed by contact with the detonator.