Knee protection airbag apparatus

A knee protection airbag apparatus, configured to be mounted in a vehicle and disposed in front of a knee of an occupant seated in a seat, comprising:

• a casing having an opening at a vehicle rear side part thereof and fixedly mounted on a vehicle body, for accommodating a folded knee protection airbag and an inflator supplying an inflating gas to said airbag;
• an airbag cover, assembled to said casing so as to be movable in three directions including an upward-downward direction, a left-right direction, and a front-rear direction with respect to said casing, said airbag cover including
• a door portion which covers said opening of said casing and is opened when said airbag is inflated, and
• a peripheral portion which is disposed around said door portion and has an upper part that adjoins a vehicle interior component when mounted in said vehicle;
• and
• a knee panel, fixed to said vehicle body, having an opening into which said casing is received;
• wherein an upper side portion of said airbag cover is locked to said interior component;
• and
• a lower side portion of said airbag cover is locked to said knee panel so as to be movable substantially only in the upward-downward direction and the left-right direction with respect to said knee panel.