| 摘要 |
<p>The invention relates to inflatable gas bags for providing a protective cushioning effect for occupants of a vehicle in the event of an accident. More particularly, the invention is directed to an igniter for an inflator for pyrotechnically inflating such a protective gas bag. …<??>In one embodiment, the igniter includes two igniter segments comprising tubes (10, 11) having outlet ports (14), and filled with ignition material. The tubes are connected in tandem by an interconnector (12). A fast burning fuse (16) passes through the interconnector (12) and directly contacts the ignition material in one tube (11), whilst contacting a delay disc (15) of propellant in the other tube (10). In operation, when the igniter is operatively assembled within an inflator containing propellant, and when the igniter is activated, the ignition material in tube (10) is initially ignited, igniting the adjacent inflator propellant, and after a delay determined by the burn rate of the delay disc (15), the ignition material in the tube (11) is also ignited, igniting the inflator propellant adjacent the latter tube. …<??>Thus, the igniter causes the propellant in the inflator to ignite in a progressive manner so as to inflate the bag slowly at the onset but more rapidly later as inflation progresses. The overall inflation time is very rapid, but the slow onset of bag deployment starts gentle movement against the vehicle's occupant, and thus reduces the possibility of injury as compared wth a more sudden movement by rapid inflation from the outset.</p> |
