초록 ▼

The electropyrotechnic igniter (1) comprises a body divided into a downstream chamber and an upstream chamber by a discoid metal piece (8), the downstream chamber containing a resistive heating element (11), a pyrotechnic initiating composition (12) and a pyrotechnic ignition composition (7), and th

The electropyrotechnic igniter (1) comprises a body divided into a downstream chamber and an upstream chamber by a discoid metal piece (8), the downstream chamber containing a resistive heating element (11), a pyrotechnic initiating composition (12) and a pyrotechnic ignition composition (7), and the upstream chamber containing a rectangular electronic card (17) extended by three external metal pins (29 to 31), on which electronic card conducting tracks are provided. Two metal connection pins (13, 14) pass through the discoid metal piece (8) and connect the said conducting tracks to the resistive heating element (11). A means of intercommunicating and of triggering a train of specific electric pulses as well as a means of storing electrical energy are connected to the conducting tracks. This igniter is more especially intended to be used in motor-vehicle safety, especially for constituting the device for igniting a gas generator associated with an airbag.

대표청구항 ▼

1. Electropyrotechnic igniter (1) comprising a body having a resistive heating element (11), a pyrotechnic ignition composition (7), the said resistive resistive heating element (11) being electrically connected to at least two external electrodes attached to a printed-circuit substrate produced in

1. Electropyrotechnic igniter (1) comprising a body having a resistive heating element (11), a pyrotechnic ignition composition (7), the said resistive resistive heating element (11) being electrically connected to at least two external electrodes attached to a printed-circuit substrate produced in the form of an electronicc card (17) on which conducting tracks (18, 19) are provided, characterized in that:i) a transverse separating wall (8) divides the inside of the body into a downstream chamber, containing the resistive heating element (11), the pyrotechnic initiating composition (12) and the pyrotechnic ignition composition (7), and an upstream chamber containing the electronic card (17); ii) electrical connection means pass through the said transverse separating wall (8) and connect the conducting tracks (18, 19) on the electronic card (17) to the resistive heating element (11); iii) a means of intercommunicating and of triggering coded information as well as a means (20) of storing electrical energy are connected to the conducting tracks (18, 19), said transverse separating wall (8) comprising a metal piece (8) with several perforations, each of these perforations having a glass side wall (9, 10).