Patent ID: 7681908
Filing Date: 2010-03-23
Classification: B60R

Abstract:
1. A knee airbag device comprising: an airbag module that includes a gas generation device that is operated when a collision occurs, and a knee airbag that is stored in a folded state inside a column cover that covers a rear end portion of a steering column, wherein when the knee airbag receives gas from the gas generation device, the knee airbag is inflated and deployed toward a knee of an occupant; and an airbag door, provided in a lower portion of the column cover, which is made of a material that is more flexible than a material of which the column cover is made, wherein when the knee airbag is inflated and deployed, the airbag door is opened toward the knee of the occupant due to an airbag inflation pressure, wherein the airbag door covers an opening which is formed in a lower wall of the column cover, which extends from the right wall to the left wall of the column cover, and through which the knee airbag protrudes; the airbag door is provided in a region such that the airbag door contacts the knee of the occupant when the knee airbag is inflated and deployed; and a tear portion is formed in the airbag door, and the tear portion is torn so that a front door and a rear door, which open a lower portion of the opening, are opened toward a front side and a rear side, respectively, and a right door and a left door, which open side portions of the opening, are opened toward a right side and a left side, respectively, when a predetermined airbag inflation pressure is applied to the airbag door.