Patent ID: 7240402

Claim:
A hinge structure of a case, intended to join a synthetic resin case body and a synthetic resin lid together in a manner capable of opening, turning, and closing said lid, said hinge comprising: a first hinge connector, including a first shaft hole, disposed at a rear of said synthetic resin case body having powder storage; second hinge connectors, including second shaft holes, disposed at the rear of said synthetic resin lid that opens or closes the case body; two hinge shafts made of a synthetic resin, with each of said hinge shafts being inserted through said first shaft hole and said second shaft hole; overhanging ridges disposed at the rear of the case body in left and right parts other than where said first hinge connector is located; lid stops disposed respectively at the rear of the second hinge connectors at positions opposite to said overhanging ridges that have been disposed at the rear of the case body and are allowed to butt against said overhanging ridges from an underside when the lid is turned around fully on the case body; stopping pieces disposed at inner ends of the second hinge connectors of the lid, with said connectors being located in abutment with said first hinge connector; and stopping mechanisms disposed on both end faces of the first hinge connector of the case body at positions opposite to, and in contact with, said stopping pieces to allow each of said stopping pieces to butt against a top contact surface of said stopping mechanisms from an upside when the lid is turned around fully on the case body.