Attachment structure

An attachment structure for attaching an object to a subject comprising:

• a plurality of attaching legs projected from an outer surface of the object, disposed on and overlapped with the subject;
• a single washer fixed to the subject together with one attaching leg by a bolt, while being directly disposed on and overlapped with a side of at least one of the attaching legs, the side facing away from the subject;
• and
• a cover directly attached to the one attaching leg, holding the washer between a substrate portion of the cover and the one attaching leg, and having an exposing hole for exposing a first hole provided on the washer,
• wherein a diameter of the first hole is smaller than a diameter of a second hole provided on the one attaching leg for inserting a shaft of the bolt,
• wherein the washer is held between the one attaching leg and the cover movably in at least a range where the first hole is overlapped with the second hole provided on the one attaching leg, received in a concave portion formed on a surface of the one attaching leg,
• wherein a size from an edge of the first hole to an outer edge of the washer is equal to a size from an edge of the second hole to an outer edge of the concave portion such that in any position within the concave portion the washer is moved without the shaft of the bolt being inserted into the first hole and the second hole, the entire first hole consistently overlaps with the second hole, and
• wherein the washer is a round shape in plan view.