| 摘要 |
PROBLEM TO BE SOLVED: To dispense with any sorting and collection in a case of a product jointly comprising metal parts and synthetic resin parts by using synthetic resin elastic members in place of a metal torsion spring which is usually used as a spring for urging a lid plate, and totally disposing them as the synthetic resin product when disposing a box having the synthetic resin lid plate with the lid plate for opening/closing an opening urged in the lid opening direction and pivotably supported by an opening side part of the box. SOLUTION: A base end is fixed to a part of an inner wall surface of the box 1, a synthetic resin elastic member 41 is provided in the box, a tip of a pressing plate 47 provided on the elastic member is abutted on an inner surface of the base of the lid plate close to a pivotably supported part of the opened lid plate 21, and the elastic member 41 is elastically deformable when closing the lid. |
