Patent ID: 7201395
Filing Date: 2007-04-10
Classification: B60R

Abstract:
1. A knee-protecting airbag device located below a steering column in front of a driver's seat and, at a lower side of a key cylinder into which an ignition key with an accessory is inserted, the airbag device comprising: a housing case located below the steering column; an airbag folded and housed in the housing case in an undeployed condition, and upon inflow of inflation gas, the airbag protruding rearward from the housing case to deploy upward in order to protect the knees of a seated driver; the airbag comprising: a damage prevention means for preventing the airbag from being damaged by the key accessory and leaking gas when the inflated airbag contacts with the key accessory directly wherein: the airbag comprises a primary inflatable portion, the primary inflatable portion being inflatable from an initial stage of inflow of inflation gas, and including the general portion as a part of the primary inflatable portion, and a secondary inflatable portion, the secondary inflatable portion starting to inflate around when the primary inflatable portion completes inflation, the cover portion is located either in an area of the secondary inflatable portion of the airbag, or in an area near the secondary inflatable portion, thereby constituting the damage prevention means, upon completion of inflation by the primary inflatable portion, the upper edge side of the airbag deploys up to a position of the upper edge side at complete inflation of the airbag with the cover portion remaining uninflated and in a thin plate-shape.