Air bag device and method for folding an air bag
AssigneeDenso Corporation
InventorsMasahiro Taguchi, Shoichi Yamanaka, Tomoji Suzuki, Masayasu Kato, Tetsuya Takafuji, Shinichiro Kuroyanagi
Life of this patent
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Abstract
Gas generated from an inflator flows into a first portion of a main bag and each part of an inner bag, and the first portion is inflated toward an area in front of passenger's seat. Then, the gas filling the first portion which has been inflated flows into a second portion of the main bag. In this situation, the inflation direction of the second portion is more downward than the inflation direction of the first portion. As a result, a speed of backward inflation is decreased.
Claims21
An air bag device for vehicles, the device comprising:
- a case disposed in a vehicle;
- a gas generator, in the case, for generating gas upon collision of the vehicle, the gas generator having an opening for allowing the gas to flow;
- and
- an air bag folded in the case, the air bag including:
- a contact face including an upper portion and a lower portion,
- wherein the lower portion is disposed at a position adjacent to a side of the gas generator and the upper portion is disposed at one of a position adjacent to a top of the gas generator and a position adjacent to a side of the gas generator opposite to the side adjacent to the lower portion, such that a boundary between the upper and lower portions is close to the gas generator opening, and
- inflation control means for receiving the gas directly through the opening from the gas generator to near the boundary of the upper and lower portions and for controlling inflation of the upper and lower portions of the contact face to inflate the upper portion of the contact face earlier than the lower portion of the contact face when the gas is received from the gas generator.
An air bag device for vehicles, the device comprising:
- a case disposed in a vehicle, the case including an opening;
- a gas generator, in the case, for generating gas upon collision of the vehicle;
- a main bag, folded in the case, including
- a first portion located next to the opening of the case, and
- a second portion located at a portion of the case opposite the opening of the case, for receiving the gas from the first portion;
- and
- an inner bag folded in the first portion of the main bag, for receiving the gas from the gas generator, the inner bag including holes for providing the gas to the first portion of the main bag;
- wherein the first portion of the main bag is inflated upon being provided with the gas from the inner bag, and the second portion of the main bag is inflated later than the first portion of the main bag upon being provided with the gas from the first portion of the main bag.
A method of folding an air bag including a main bag and an inner bag contained in the main bag, the method comprising:
- spreading out one half side of the main bag in one direction;
- spreading out the other half side of the main bag in another direction;
- placing the inner bag in one half side of the main bag;
- folding a right side and a left side of the one half side of the main bag and the right side and the left side of the other half side of the main bag toward a center side of the main bag so that total of lateral widths, which includes a lateral width of the first portion and a lateral width of the second portion, is approximately the same as a lateral width of the case;
- and
- further separately folding the first portion and the second portion to have a predetermined shape.
An air bag device for vehicles, the device comprising:
- a case disposed in a vehicle;
- a gas generator, in the case, for generating gas upon collision of the vehicle;
- and
- an air bag folded in the case, the air bag including:
- a contact face including an upper portion and a lower portion, and
- inflation control means for receiving the gas from the gas generator and for controlling inflation of the upper and lower portions of the contact face to inflate the upper portion of the contact face earlier than the lower portion of the contact face when the gas is received from the gas generator,
- wherein the air bag includes:
- a belt portion, and
- side portions which are formed at both longitudinal sides of the belt portion and have plural polygon-shaped sections which are consecutively formed along the belt portion;
- and
- a total of angles at top points of the plural polygon-shaped sections away from the belt portion is less than 360 degrees.
Dependencies are inferred from the claim text.