Air bag device
First Claim
1. An airbag device comprising a casing having an opening side and a bottom side, an inflator assuming a generally columnar form housed in the casing on the bottom side, an airbag folded and housed in the casing at the opening side, and a cylindrical member having on its peripheral surface holes for blowing therethrough gas emitted from the inflator into the airbag,wherein the cylindrical member is provided with a partition wall projecting toward the opening side of the casing and comparting a space housing the airbag therein into two compartments, and the airbag is housed dividedly in the two compartments, the airbag has a lip portion extending to a bottom part of the cylindrical member wherein the cylindrical member is enclosed by the airbag, the bottom part of the cylindrical member is locked to a bottom surface of the casing to form a locked part and the lip portion of the airbag is engaged with the locked part whereby the airbag is fixed to the casing, wherein the inflator is provided at its axial end with a gas blowoff part, the cylindrical member is disposed inside the lip portion of the airbag and disposed between a first sidewall and a second sidewall of the casing opposed to each other, the inflator inserted within the cylindrical member is fixed at one end constituting the gas blowoff part to the first sidewall and at another end opposite to the gas blowoff part to the second sidewall, the gas blowoff part of the inflator is covered with a gas-restraining wall, the gas-restraining wall projecting from the first sidewall between the gas blowoff part and the cylindrical member, and wherein the gas-restraining wall is provided in the entire peripheral area of the gas blowoff part and the gas-restraining wall projects so as to cover more than a half of the gas blowoff part in the axial direction.
2 Assignments
0 Petitions
Accused Products
Abstract
In an airbag device (10) wherein within a casing (12) opening upwardly an inflator (16) and an airbag (14) are housed at its bottom part and the opening side, respectively, a cylindrical diffuser (18) surrounding the outer circumference of the inflator (16) is provided, which has a partition wall (40) projecting toward the opening side of the casing and partitioning an airbag-housing space into a forward side and a rearward side relative to the vehicle, in which to house the airbag (14) dividedly, and a lip portion (32) of the airbag (14) is superposed downwards of the diffuser (18) thereby to lock the bottom part of the diffuser (18) to the bottom surface of the casing (12). Thus, it is easy, albeit compart, to control the deployment behavior of the airbag and excellent in workability of assembling the airbag in the casing.
27 Citations
12 Claims
-
1. An airbag device comprising a casing having an opening side and a bottom side, an inflator assuming a generally columnar form housed in the casing on the bottom side, an airbag folded and housed in the casing at the opening side, and a cylindrical member having on its peripheral surface holes for blowing therethrough gas emitted from the inflator into the airbag,
wherein the cylindrical member is provided with a partition wall projecting toward the opening side of the casing and comparting a space housing the airbag therein into two compartments, and the airbag is housed dividedly in the two compartments, the airbag has a lip portion extending to a bottom part of the cylindrical member wherein the cylindrical member is enclosed by the airbag, the bottom part of the cylindrical member is locked to a bottom surface of the casing to form a locked part and the lip portion of the airbag is engaged with the locked part whereby the airbag is fixed to the casing, wherein the inflator is provided at its axial end with a gas blowoff part, the cylindrical member is disposed inside the lip portion of the airbag and disposed between a first sidewall and a second sidewall of the casing opposed to each other, the inflator inserted within the cylindrical member is fixed at one end constituting the gas blowoff part to the first sidewall and at another end opposite to the gas blowoff part to the second sidewall, the gas blowoff part of the inflator is covered with a gas-restraining wall, the gas-restraining wall projecting from the first sidewall between the gas blowoff part and the cylindrical member, and wherein the gas-restraining wall is provided in the entire peripheral area of the gas blowoff part and the gas-restraining wall projects so as to cover more than a half of the gas blowoff part in the axial direction.
-
7. An airbag device comprising an airbag, an inflator assuming a generally columnar form and provided with a gas blowoff part at one end of the columnar form, a casing housing therein the airbag and the inflator and having an opening for expanding the airbag out therethrough, and a cylindrical member surrounding an outer periphery of the inflator and having at its circumferential surface holes for blowing gas emitted from the inflator into the airbag,
wherein the cylindrical member is disposed inside a lip portion of the airbag and disposed between a first sidewall and a second sidewall of the casing opposed to each other, the inflator placed within the cylindrical member is fixed at its one end constituting a gas blowoff part to the first sidewall and at another end opposite to the gas blowoff part to the second sidewall, the airbag is engaged inside the casing by means of the cylindrical member disposed therein, the gas blowoff part of the inflator is covered with a gas-restraining wall projecting from the first sidewall between the gas blowoff part and the cylindrical member, and wherein the gas-restraining wall is provide in the entire peripheral area of the gas blowoff part and the gas-restraining wall projects so as to cover more than a half of the gas blowoff part in the axial direction.
Specification