Gas generator for air bag and air bag device
First Claim
1. A gas generator for an air bag comprising, in a cylindrical housing, provided at its peripheral wall with a plurality of gas discharging ports, which housing is longer in the axial direction than in the radial direction, an ignition means to be actuated upon the impact, and a gas generating means to be ignited and burnt by the ignition means, whereina combustion chamber for accommodating the gas generating means and a filter means accommodating chamber for accommodating a filter means are formed in the housing adjacent to each other in the axial direction and these chambers communicate with each other, the combustion chamber accommodating the gas generating means is separated from the filter means accommodating chamber with a partitioning member curved into a convex shape towards the inside of the combustion chamber and having a through-hole, and moisture-proofing of the housing is achieved by a seal tape which closes the gas discharging ports.
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Accused Products
Abstract
The present invention provides a gas generator capable of easily and unfailingly closing a gas discharging port formed in a housing. The invention provides a gas generator for an air bag in which an amount of accommodated gas generating agent can be varied and the gas generating agent can be ignited and burnt unfailingly even by the ignition means having normal output. The invention provides a gas generator which has sealing structures as little as possible and in addition to a simple structure and can be manufactured easily, and in that a activation performance and activation timing can be adjusted at a multiple stage.
29 Citations
17 Claims
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1. A gas generator for an air bag comprising, in a cylindrical housing, provided at its peripheral wall with a plurality of gas discharging ports, which housing is longer in the axial direction than in the radial direction, an ignition means to be actuated upon the impact, and a gas generating means to be ignited and burnt by the ignition means, wherein
a combustion chamber for accommodating the gas generating means and a filter means accommodating chamber for accommodating a filter means are formed in the housing adjacent to each other in the axial direction and these chambers communicate with each other, the combustion chamber accommodating the gas generating means is separated from the filter means accommodating chamber with a partitioning member curved into a convex shape towards the inside of the combustion chamber and having a through-hole, and moisture-proofing of the housing is achieved by a seal tape which closes the gas discharging ports.
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4. A gas generator for an air bag comprising, in a cylindrical housing, provided at its peripheral wall with a plurality of gas discharging ports, which housing is longer in the axial direction than in the radial direction, an ignition means to be actuated upon the impact, and a gas generating means to be ignited and burnt by the ignition means, wherein
a combustion chamber for accommodating the gas generating means and a filter means accommodating chamber for accommodating a filter are formed in the housing adjacent to each other in the axial direction, the gas generating means accommodated in the combustion chamber is pressed and/or held towards the filter means accommodating chamber side by an inwardly flange-shaped plate member fitted into the combustion chamber, and the plate member is slidable in the axial direction of the housing, the combustion chamber accommodating the gas generating means is separated from the filter means accommodating chamber with a partitioning member curved into a convex shape towards the inside of the combustion chamber and having a through-hole, and moisture-proofing of the housing is achieved by a seal tape which closes the gas discharging port.
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6. A gas generator for an air bag comprising, in a cylindrical housing, provided at its peripheral wall with a plurality of gas discharging ports, which housing is longer in the axial direction than in the radial direction, an ignition means to be actuated upon the impact, and a gas generating means to be ignited and burnt by the ignition means, wherein
a combustion chamber for accommodating the gas generating means and a filter means accommodating chamber for accommodating a filter means are formed in the housing adjacent to each other in the axial direction, the combustion chamber accommodating the gas generating means is separated from the filter means accommodating chamber with a partitioning member curved into a convex shape towards the inside of the combustion chamber and having a through-hole, a flame-transferring tube formed at its peripheral wall with a plurality of flame-transferring holes is accommodated in the combustion chamber, the flame-transferring tube extends in the axial direction of the housing, and an end of the tube is connected into an ignition means accommodating chamber in which ignition means is accommodated, and moisture-proofing in the housing is achieved by closing the gas discharging ports with a seal tape.
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9. A gas generator for an air bag comprising, in a cylindrical housing which is longer in the axial direction than in the radial direction, two ignition means to be actuated upon the impact and accommodated in the housing, and two combustion chambers accommodating gas generating means to be ignited and burnt by the ignition means, wherein
the combustion chambers are provided on the opposite ends in the housing, a filter means accommodating chamber for accommodating filter means is provided between these combustion chambers, either one of the combustion chambers communicates with the filter means accommodating chamber, either one of the combustion chambers is defined inside of a cup member provided with a plurality of through-holes formed in a peripheral wall of the cup member, each through-hole is closed with a closing member, and a flow path from the through-holes to the filter means accommodating chamber is formed between an outer peripheral surface of the cup member and an inner peripheral surface of the housing.
Specification