Airbag device
First Claim
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1. An airbag device comprising:
- an inflator;
an airbag communicating with the inflator for undergoing inflation by a gas generated from the inflator;
a holding member for holding the airbag in a state as folded and contained therein, and pressing down on an outer circumference of the airbag, to thereby restrain inflation and expansion of the airbag in a direction extending from a center of the airbag to the outer circumference of the airbag, caused by the gas generated from the inflator at least in an initial stage of the inflation of the airbag; and
a gas rectification member for rectifying and guiding the gas generated from the inflator up to the vicinity of a part of the airbag, inflating in the initial stage of the inflation thereof, which is provided substantially at a central part of the airbag,wherein the holding member is formed to have a hole at the time of inflation of the airbag so that the airbag travels through the hole during inflation,wherein the gas rectification member is not attached to a part of the airbag which expands during the inflation of the airbag,wherein the airbag has a folded portion,wherein the folded portion of the airbag is provided between the holding member and the gas rectification member in a radial direction of the airbag during the initial stage of inflation,wherein the holding member is separate from an airbag cover, andwherein the opening in the holding member is sized to allow a part of the airbag cover to pass through the opening of the holding member.
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Accused Products
Abstract
There is provided an airbag device being excellent in performance of protection of an occupant wherein a folded airbag (10) undergoes sequential and orderly expansion starting from a region where the expansion ought to be started. It is characterized in that a gas rectification member (12′) for rectifying and guiding a gas generated from an inflator (30) up to the vicinity of a part of the airbag (10), inflating in the initial stage of the expansion thereof, is provided substantially at the central part of the airbag (10).
26 Citations
14 Claims
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1. An airbag device comprising:
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an inflator; an airbag communicating with the inflator for undergoing inflation by a gas generated from the inflator; a holding member for holding the airbag in a state as folded and contained therein, and pressing down on an outer circumference of the airbag, to thereby restrain inflation and expansion of the airbag in a direction extending from a center of the airbag to the outer circumference of the airbag, caused by the gas generated from the inflator at least in an initial stage of the inflation of the airbag; and a gas rectification member for rectifying and guiding the gas generated from the inflator up to the vicinity of a part of the airbag, inflating in the initial stage of the inflation thereof, which is provided substantially at a central part of the airbag, wherein the holding member is formed to have a hole at the time of inflation of the airbag so that the airbag travels through the hole during inflation, wherein the gas rectification member is not attached to a part of the airbag which expands during the inflation of the airbag, wherein the airbag has a folded portion, wherein the folded portion of the airbag is provided between the holding member and the gas rectification member in a radial direction of the airbag during the initial stage of inflation, wherein the holding member is separate from an airbag cover, and wherein the opening in the holding member is sized to allow a part of the airbag cover to pass through the opening of the holding member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An airbag device comprising:
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an inflator; an airbag communicating with the inflator for undergoing inflation by a gas generated from the inflator; a holding member for holding the airbag in a state as folded and contained therein, and pressing down on an outer circumference of the airbag, to thereby restrain inflation and expansion of the airbag in a direction extending from a center of the airbag to the outer circumference of the airbag, caused by the gas generated from the inflator at least in an initial stage of the inflation of the airbag; and a gas rectification member for rectifying and guiding the gas generated from the inflator up to the vicinity of a part of the airbag, inflating in the initial stage of the inflation thereof, which is provided substantially at a central part of the airbag, wherein the holding member is formed to have a hole at the time of inflation of the airbag so that the airbag travels through the hole during inflation, wherein the gas rectification member is not attached to a part of the airbag which expands during the inflation of the airbag, wherein the airbag has a folded portion, wherein the folded portion of the airbag is provided between the holding member and the gas rectification member in a radial direction of the airbag during the initial stage of inflation, wherein the holding member is separate from an airbag cover, wherein the gas rectification member has multiple folded pleats thereon.
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14. An airbag device, comprising:
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an inflator; an airbag communicating with the inflator for undergoing inflation by a gas generated from the inflator; a holding member for holding the airbag in a state as folded and contained therein, and pressing down on an outer circumference of the airbag, to thereby restrain inflation and expansion of the airbag in a direction extending from a center of the airbag to the outer circumference of the airbag, caused by the gas generated from the inflator at least in an initial stage of the inflation of the airbag; and a gas rectification member for rectifying and guiding the gas generated from the inflator up to the vicinity of a part of the airbag, inflating in the initial stage of the inflation thereof, which is provided substantially at a central part of the airbag, wherein the holding member is formed to have a hole at the time of inflation of the airbag so that the airbag travels through the hole during inflation, wherein the gas rectification member is not attached to a part of the airbag which expands during the inflation of the airbag, wherein the airbag has a folded portion, wherein the folded portion of the airbag is provided between the holding member and the gas rectification member in a radial direction of the airbag during the initial stage of inflation, wherein the holding member is separate from an airbag cover, wherein the outer circumference of the airbag surrounds an area when the airbag is folded and contained within the holding member prior to inflation, wherein the hole of the holding member surrounds an area at the time of inflation, and wherein the area surrounded by the hole of the holding member at the time of inflation is smaller than the area surrounded by the outer circumference of the airbag when the airbag is folded and contained within the holding member prior to inflation.
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Specification