Patent attributes
An airbag is configured by six base materials of two side wall configuration panels, a projecting portion configuration panel, a front panel, and two rear panels. Each of the side wall configuration panels configure a left wall portion or a right wall portion facing each other on a side in a rightward-leftward direction in a main body inflation portion, and a projecting portion configuration portion configuring a projecting inflation portion is located in one of the side wall configuration panels. The front panel configures a region from an upper wall portion to a lower wall portion, which face each other on a side in an upward-downward direction in the main body inflation portion. Each of the rear panels configures a rear surface in the main body inflation portion when the main body inflation portion is completely inflated. The projecting portion configuration panel has an external shape substantially coincident with that of the projecting portion configuration portion. The projecting portion configuration panel and the rear panel on the projecting inflation portion side include a recess portion configuration portion configuring a restraining recess portion.
