An igniter 26 accommodated in a diffuser portion 20 has, on a peripheral face of a cup 28 covering an igniting portion, a hole 29 covered with a sealing tape from the inside of the cup, and the hole 29 exactly opposes the rupturable plate 19. When the igniter 26 is actuated, a rupturing energy is in
An igniter 26 accommodated in a diffuser portion 20 has, on a peripheral face of a cup 28 covering an igniting portion, a hole 29 covered with a sealing tape from the inside of the cup, and the hole 29 exactly opposes the rupturable plate 19. When the igniter 26 is actuated, a rupturing energy is intensively discharged from the hole 29 to the rupturable plate 19, so that the rupturing ability of the rupturable plate 19 can be improved.
대표청구항▼
The invention claimed is: 1. An inflator, comprising: a cylindrical inflator housing which is closed at one end thereof and having an opening at the other end, and in which a pressurized gas is charged; a diffuser portion connected to the opening of the inflator housing, and having a gas discharge
The invention claimed is: 1. An inflator, comprising: a cylindrical inflator housing which is closed at one end thereof and having an opening at the other end, and in which a pressurized gas is charged; a diffuser portion connected to the opening of the inflator housing, and having a gas discharge port therein; a rupturable plate that closes at least one portion of a gas discharge passage, the gas discharge passage extending from the inflator housing to the gas discharge port of the diffuser portion; an igniter including an igniting portion covered by a cup and provided within the diffuser portion such that an axial direction of the inflator housing is orthogonal to an axial direction of the igniter, the igniter generating a combustion product upon activation thereof; and a fragile portion provided in a peripheral surface of the cup and opposing the rupturable plate, such that the combustion product is directed towards a single direction. 2. An inflator according to claim 1, wherein said fragile portion is ruptured upon an activation of the igniter and a rupturing energy acts on the rupturable plate from the fragile portion. 3. An inflator according to claim 1, wherein the fragile portion provided in the igniter is constituted with a combination of a hole provided in the cup covering the igniting portion of the igniter and a sealing tape closing the hole from the inside of the cup. 4. An inflator according to claim 1, wherein the fragile portion provided in the igniter comprises a portion surrounded by a groove or a portion with a notch, which is provided in a side face of the cup covering the igniting portion of the igniter. 5. An inflator according to claim 1, wherein the pressurized gas is charged in a single space defined by the cylindrical inflator housing and the diffuser portion. 6. An inflator according to claim 1, further comprising: a diffuser tube, having a second gas discharge port, connected to the gas discharge port of the diffuser portion. 7. An inflator according to claim 6, wherein the diffuser tube is arranged, such that a center axis of the diffuser tube and a center axis of the inflator housing coincide or are parallel to each other. 8. An inflator according to claim 6, wherein the diffuser tube has a plurality of second gas discharge ports in a peripheral face thereof, and the plurality of second gas discharge ports are provided circumferentially at equal intervals. 9. An inflator according to claim 8, further comprising: a filter, which catches fragments of the rupturable plate, being disposed in the diffuser tube. 10. An inflator according to claim 7, wherein the diffuser tube has a plurality of second gas discharge ports in a peripheral face thereof and the plural second gas discharge ports are provided circumferentially at equal intervals. 11. An inflator, comprising: a cylindrical inflator housing provided with an opening portion at one end thereof and a closed portion at the other end thereof, and including a pressurized gas therein; a diffuser portion connected to the opening portion and having a gas discharge port, the diffuser portion including therein a gas passage extending from the inflator housing to the gas discharge port; a rupturable plate that closes at least a portion of the gas passage; an igniter provided within the diffuser portion such that an axis of the igniter is perpendicular to an axis of the cylindrical inflator housing, the igniter generating a combustion product upon activation thereof; and a deforming member provided between the igniter and the rupturable plate, such that the deforming member is prevented from making a direct contact with the rupturable plate prior to activation of the inflator, and is deformed by the combustion product to cause the rupturable plate to rupture by a deformation thereof. 12. The inflator according to claim 11, wherein the deforming member is formed in a single piece and attached to the diffuser portion before activation of the inflator. 13. The inflator according to claim 12, wherein the deforming member is a circumferential portion of a cap that surrounds at least an igniting portion of the igniter and is disposed in a direction perpendicular to the axis of the cylindrical inflator housing. 14. The inflator according to claim 11, wherein the deforming member includes a weakened portion that deforms upon receiving the combustion product.
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이 특허에 인용된 특허 (18)
Nakashima, Yoshihiro; Katsuda, Nobuyuki, Airbag gas producer.
Frey Stuart M. (Bloomfield Hills MI) Headley Paul S. (Glendale AZ) Semchena John H. (Royal Oak MI) Thompson Richard J. (Imlay City MI) Faigle Ernst M. (Imlay City MI) Grace Gregory B. (Gilbert AZ), Hybrid air bag inflator.
Horton, Mark; Ritter, Kimberly; McLeod, II, William Francis; Kelley, Michael Eugene; Dennis, Michael K.; Townsend, Richard Mead, Opening device for a cold gas inflator.
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