Patent ID: 7874575

Claim:
An airbag apparatus comprising: an airbag including an inlet port for introducing inflation gas; a pyrotechnic inflator that generates a gas for inflating the airbag by chemical reaction, the inflator including a columnar body that includes on and along an outer circumference of an upper part thereof discharge ports for discharging the gas; a case that houses the airbag in a folded state and holds the inflator, the case including an insert hole for receiving the upper part of the inflator body where the discharge ports are located and a mounting seat arranged around the insert hole on an upper face of the case to which mounting seat a peripheral region of the inlet port of the airbag is attached; an annular retainer that attaches the peripheral region of the inlet port of the airbag to the mounting seat of the case, the retainer including a hold-down portion that holds down the peripheral region of the inlet port of the airbag and is mounted on the case; a cover wall having a tubular contour and disposed around and proximate the outer circumference of the inflator body set in the case in such a manner as to extend upwardly from the vicinity of an inner edge of the hold-down portion of the retainer, the cover wall including a plurality of outlet ports formed intermittently to face the circumference of the inflator body so as to release the gas exited the discharge ports of the inflator body generally in a direction orthogonal to an axis of the inflator body and radially about the inflator body; and a plurality of deflectors formed to oppose the outlet ports on the outside of the cover wall and above the hold-down portion of the retainer for deflecting the gas exited the outlet ports of the cover wall away from the outlet ports and within a range of angle from the direction orthogonal to the axis of the inflator body to a downward direction extending toward the hold-down portion, each of the plurality of deflectors being configured as a catch to capture residual particles contained in the gas when receiving the gas, wherein the cover wall includes a restriction wall that connects an upper hem of each of the outlet ports and an upper end of each of the deflectors for preventing an upward outflow of inflation gas.