US Patent 9103145 Case latch assembly

A case latch assembly includes a first and second lock mounting parts, a strike plate member provided on the first lock mounting part, a hinge member, and a strike plate engagement member. The hinge member is mounted for pivotable movement on a torsion element arranged to apply torsion to the hinge member to bias the hinge member towards or away from the second lock mounting part. The strike plate engagement member is mounted on the hinge member and is reciprocally moveable between a closed position in which the strike plate engagement member engages with the strike plate member and an open position in which the strike plate engagement member is disengaged from the strike plate member.