Patent ID: 7845505

Claim:
A container cap which is put on a mouth of a container to top a plug member fitted into the mouth, the cap comprises: a locking member which has a top plate with a rim and a plurality of locking pieces located around the rim; and a holder member which is mounted surrounding an outer periphery of the locking pieces, wherein each locking piece is extended downward from the rim and has a longitudinal extent; wherein each locking piece comprises an upper side part with an outer periphery and a lower side part with an outer periphery connected to the upper side part by a thin-walled bendable part located midway through the piece in a longitudinal direction thereof that functions as a hinge; wherein the upper side part is locked to said plug member to directly engage the plug member from below in a state where the holder member is mounted on the outer periphery of the upper side part thereof; wherein said lower side part is locked to a part of said mouth from below in a state where the holder member is mounted on the outer periphery of the lower side part thereof; wherein said holder member is movable upwards and downwards relative to the locking member; wherein at least one of said holder member and said locking member has a locking projected part which blocks upward movement of the lower edge of the holder member relative to the upper side part of the locking piece as the holder member is moved upwardly from the state wherein the holder member is mounted on the outer periphery of the lower side part, wherein each of the holder member and the locking piece has a locking projected part, the locking projected part of the holder member being formed on an inner periphery of a lower edge of the holder, the locking projected part of the locking piece being formed on the outer periphery of the upper side part; and a connecting part which connects an upper edge of the locking member and a lower edge of the holder and is severable by pushing down the holder member relative to the locking member, whereby with the container cap on the mouth of a container, the holder member can be pushed downwardly relative to the locking member to sever the lower edge of the holder member and allow the holder member to surround the locking pieces so that the upper and lower side parts are thereby maintained respectively against a part of the mouth and the plug from below each of the part of the mouth and the plug to secure the container cap to the container, whereupon upward movement of the holder member causes the locking projecting parts on the holder member and locking pieces to interact so that as the holder member is moved upwardly the locking pieces are repositioned initially causing the lower side parts to bend outwardly at the hinges to separate from below the part of the mouth and thereafter causing the upper side parts to bear against the plug and cause the upper side parts to draw the plug from the mouth as the holder member is moved further upwardly.