Patent ID: 8641091

Claim:
A hybrid inflator of an airbag, comprising: a main casing, comprising a bottom housing and an upper housing, and the bottom housing having an ignition hole formed on a bottom wall of the bottom housing, and the upper housing being correspondingly fixed at the top of the bottom housing and the upper housing together with the bottom housing forming a complete sealed casing, and a through opening penetrated through a top end wall of the upper housing; a central channel, having a pipe member with a hollow therein and an opening formed at an upper end of the pipe member, and a bottom of the pipe member being correspondingly fixed onto the bottom housing, and the upper end of the pipe member correspondingly passing through the through opening for fixing the upper housing, and a plurality of convective holes being formed on a wall of the central channel; a vent tube, correspondingly sheathed on an external side of the central channel, and having an aluminum foil sticker attached onto an external surface of the vent tube, and a plurality of throttle holes penetrated through the vent tube; a rupture disc, correspondingly sealed and disposed at an upper end of the central channel for preventing a gas outflow from the main casing, and openable from an inner side by a pushing force of a certain degree; an inner cover group, comprising a cushion ring, a cup cover and a support plate, and the cushion ring being correspondingly disposed on an internal circular wall of the bottom housing, and the cup cover having a shape corresponding to a shape of the cushion ring and covered and fixed to a top of the cushion ring and the cup cover and the cup cover and the bottom housing being enclosed into an inner air chamber, and a propellant being disposed in the inner air chamber, and a sheath opening penetrated through the cup cover and correspondingly sheathed on the central channel, and the support plate being correspondingly disposed on the cup cover and abutted between the cup cover and the upper housing; an igniter group, correspondingly fixed to the ignition hole corresponding to the inner air chamber, for producing an ignition airflow after receiving an ignition signal, so as to further drive the propellant to burn; a first buffering pad, laid on the bottom of the inner air chamber; a second buffering pad, correspondingly disposed in the inner air chamber to separate the space for filling the propellant; and a diffuser, correspondingly sheathed and fixed at the main casing, and a space being formed between the diffuser and the main casing for solidifying and depositing a solid residue after the propellant is burned, and the diffuser having a plurality of exhaust holes formed thereon.