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AssigneeToyota Shatai Kabushiki Kaisha
InventorsTakahiro Komura, Junya Usami, Hideyuki Hayashi, Takahiro Muranushi, Kenji Katou
Estimating the term…
An air bag door in which the remaining thickness of a substrate at a centerline of a fracture groove formed into the shape of an air bag door on a back surface of the substrate is set to be smaller than other portions, and dotted fracture perforations for braking the superficial material are selectively provided at the centerline portion and near meeting points between sidelines and the centerline. According to the invention described above, the substrate and the superficial material of the air bag door are broken in a desirable order of breakage by portions synchronously with each other when the air bag is expanded and deployed.
An air bag door comprising a fracture groove continued in the shape of an air bag door having a pair of doors formed on a back surface of a substrate of a vehicle interior material with a superficial material and dotted fracture perforations formed at a distance from each other so as to penetrate through the substrate from the bottom portion of the fracture groove and reach the superficial material, wherein the remaining thickness of the substrate of a groove portion of a central portion of a centerline of the air bag door is set to be smaller than side portions of the centerline by adjusting the depth of the groove for the fracture groove, and the dotted fracture perforations are selectively formed at the groove portion of the centerline and the groove portions near meeting points where a pair of sidelines of the air bag door meet the centerline.
A method of controlling breakage of fracture lines for controlling a substrate and a superficial material to be broken in the order of breakage by portions synchronously with each other when the air bag is deployed comprising:
Dependencies are inferred from the claim text.