Airbag apparatus
First Claim
Patent Images
1. 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.
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Abstract
The airbag apparatus is provided with a retainer that includes a hold-down portion for attachment of a periphery of a gas inlet of an airbag to the case, a cover wall surrounding an inflator body, deflectors and catches. The cover wall includes a plurality of outlet ports for releasing inflation gas exited discharge ports of the inflator body radially. The deflectors deflect the inflation gas exited the outlet ports in a range of angle from a direction orthogonal to an axis of the inflator body to a downward direction extending toward the hold-down portion. The catches capture residual particles contained in the inflation gas when the gas deflected by the deflectors hit them.
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Citations
11 Claims
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1. An airbag apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An airbag apparatus comprising:
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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; 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 is formed on the retainer to extend upwardly from the inner edge of the hold-down portion of the retainer, the retainer includes a flange that extends up to the vicinity of an inner edge of the insert hole of the case at a lower side of the outlet ports, and the retainer is comprised of; an upper part that constitutes an upper side of the hold-down portion including the cover wall and deflectors, the upper part including at an outermost region thereof an annular attachment ring provided with a plurality of attaching elements for attaching the whole retainer to the periphery of the insert hole of the case; and a lower part that constitutes a lower side of the hold-down portion, the lower part including the flange of the retainer, an annular hold-down ring provided with through holes for receiving the attaching elements, and an outer tubular portion that is formed continuous with an entire outer circumference of the hold-down portion outside of the attachment ring of the upper part and is greater in height than a top of the cover wall.
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Specification