Attachment structure for driver seat airbag device

An attachment structure of an airbag module for attaching an airbag module to a steering wheel of a vehicle, the attachment structure comprising:

• an armature configured to be connected to a steering mechanism of the vehicle;
• and
• a housing configured to accommodate the airbag module and being positioned with respect to the armature, wherein
• the housing having positioning pins for implementing relative positioning in X and Y directions with respect to the armature at a plurality of locations, and the housing having portions defining first openings for implementing positioning in a Z direction at a plurality of locations,
• the armature being provided with a plurality of second openings through which the positioning pins of the housing are inserted, and the armature being provided with a plurality of protrusions that are inserted through the first openings of the housing, and
• the position of a Z-direction lower edge of the first openings of the housing lying within a range of the depth in the Z direction of the second openings of the armature.