Airbag device
First Claim
1. A method of assembling an airbag device including a folded airbag, an inflator having a substantially cylinder shape for supplying a gas to the airbag, and a case made of a sheet metal in which the airbag and the inflator are housed, and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part, comprising the steps of:
- housing the retainer in the airbag in a folded state such that the bolt part protrudes from the airbag;
housing the airbag in the case;
passing the bolt part through a passage hole formed on a fixing wall portion of the case;
fastening a nut onto the bolt part to fix the retainer to the fixing wall portion, wherein the inflator is retained by the retainer substantially at the same time that the retainer is fixed to the fixing wall portion; and
retaining the inflator only by a support projection formed on the fixing wall portion and an abutment portion in the retainer such that the support projection prevents the inflator from being in contact with an inner face of the retainer.
1 Assignment
0 Petitions
Accused Products
Abstract
In an airbag device of the invention, by making use of a retainer which is made up of a retaining part which is provided on an outside of an inflator and bolt parts, an airbag and the inflator are fixed to a fixing wall portion of a case by fastening nuts onto the bolt parts which are caused to protrude from the fixing wall portion of the case in such a state the retaining part is housed within the airbag. A support projection is formed on the fixing wall portion in such a manner as to protrude therefrom toward the inflator side. When the nuts are fastened, the retainer moves the retaining part toward the fixing wall portion side, so that the inflator is held between and retained by abutment portions formed on the retaining part and the support projection.
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Citations
15 Claims
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1. A method of assembling an airbag device including a folded airbag, an inflator having a substantially cylinder shape for supplying a gas to the airbag, and a case made of a sheet metal in which the airbag and the inflator are housed, and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part, comprising the steps of:
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housing the retainer in the airbag in a folded state such that the bolt part protrudes from the airbag; housing the airbag in the case; passing the bolt part through a passage hole formed on a fixing wall portion of the case; fastening a nut onto the bolt part to fix the retainer to the fixing wall portion, wherein the inflator is retained by the retainer substantially at the same time that the retainer is fixed to the fixing wall portion; and retaining the inflator only by a support projection formed on the fixing wall portion and an abutment portion in the retainer such that the support projection prevents the inflator from being in contact with an inner face of the retainer. - View Dependent Claims (2, 3)
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4. An airbag device comprising:
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a folded airbag; an inflator having a substantially cylinder shape for supplying a gas to the airbag; a case made of a sheet metal in which the airbag and the inflator are housed; and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part; wherein the retainer is housed in the airbag in a folded state such that the bolt part protrudes from the airbag; the airbag having the retainer therein is housed in the case, the bolt part is passed through a passage hole formed on a fixing wall portion of the case, and a nut is fastened onto the bolt part to fix the retainer to the fixing wall portion, wherein the inflator is retained by the retainer substantially at the same time that the retainer is fixed to the fixing wall portion, wherein a support projection protruding toward the inflator is formed on the fixing wall portion at a position deviated in an axial direction of the inflator from the passage hole, when the retaining part is moved toward the fixing wall portion by fastening the nut, the inflator is fixed to the fixing wall portion by clamping a part of the inflator between an abutment portion formed in the retaining part and the support projection when the nut is fastened, and the inflator is retained only by the support projection and the abutment portion such that the support projection prevents the inflator from being in contact with an inner face of the retainer. - View Dependent Claims (5, 6)
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7. An airbag device comprising:
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a folded airbag; an inflator having a substantially cylinder shape for supplying a gas to the airbag; a case made of a sheet metal in which the airbag and the inflator are housed; and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part; wherein the retainer is housed in the airbag in a folded state such that the bolt part protrudes from the airbag; the airbag in which the retainer is housed is housed in the case, the bolt part is passed through a passage hole formed on a fixing wall portion of the case, and a nut is fastened onto the bolt part to fix the retainer to the fixing wall portion, wherein the inflator is retained by the retainer substantially at the same time that the retainer is fixed to the fixing wall portion; and wherein the airbag is folded such that the retaining part of the retainer is housed therein while a locking claw portion is protruded at an axial end of the retaining part; the airbag is housed in the case; the locking claw portion is locked at a circumferential edge of an insertion hole of the airbag to thereby substantially align a center axis of an inflator insertion opening of the retaining part with a center axis of the insertion hole of the airbag; and the inflator is inserted into the airbag from the insertion hole of the airbag through a passage hole in the case. - View Dependent Claims (8)
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9. An airbag device comprising:
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a folded airbag; an inflator having a substantially cylinder shape for supplying a gas to the airbag; a case made of a sheet metal in which the airbag and the inflator are housed; and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part, wherein the inflator and the retainer are housed in the airbag such that the bolt part protrudes from the airbag and passes through a passage hole on a fixing wall portion of the case, a nut is fastened onto the bolt part to thereby fix the airbag and the inflator to the fixing wall portion, a support projection protruding toward the inflator is formed on the fixing wall portion at a position deviated in an axial direction of the inflator from the passage hole, and when the retaining part is moved toward the fixing wall portion by fastening the nut, the inflator is fixed to the fixing wall portion while clamping a part of the inflator between an abutment portion of the retaining part and the support projection, and the inflator is retained only by the support projection and the abutment portion such that the support projection prevents the inflator from being in contact with an inner face of the retainer. - View Dependent Claims (10, 11)
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12. An airbag device comprising:
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a folded airbag; an inflator of a substantially cylinder shape, having a gas discharge port provided at a first end thereof for supplying a gas to the airbag and a part to which a connector connected to an airbag activation circuit through a lead wire is mounted at a second end thereof, wherein the inflator is housed within the case such that a bolt part provided on a retainer passes through a fixing wall portion of the case and the second end of the inflator protrudes from a passage hole formed in the case and then the inflator is fixed to the case with the retainer when a nut is fastened onto the bolt part; a case made of a sheet metal in which the airbag and the inflator are housed; and a dislodgement preventing member is provided on an outer side of the case for securing the first end of the inflator protruding from the passage hole so as to prevent a dislodgement of the inflator from the case, the dislodgement preventing member including; a securing plate portion which extends perpendicularly to an axial direction of the inflator for securing the first end of the inflator and which includes an opening through which the connector is connected to the inflator, and a fixing portion continuous from the securing plate portion extending along the axial direction of the inflator for being fixed to the case when the nut is fastened onto the bolt part; and a locking hook provided on the securing plate portion for being locked on the case so as to suppress a movement of the securing plate portion in the axial direction of the inflator. - View Dependent Claims (13)
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14. An airbag device comprising:
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a folded airbag; an inflator having a substantially cylinder shape for supplying a gas to the airbag; a case made of a sheet metal in which the airbag and the inflator are housed; and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part; wherein the airbag is folded to house the retainer that is inserted through an insertion hole on the airbag and a passage hole on the case, and wherein a locking claw portion protruded at an axial end of the retaining part is locked at a circumferential edge of the insertion hole of the airbag when the airbag is housed within the case to thereby substantially align a center axis of an inflator insertion opening of the retaining part with a center axis of the insertion hole. - View Dependent Claims (15)
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Specification