Patent ID: 8567621

Claim:
A closure comprising: a sealing unit for surrounding a mouth of a container to ensure airtightness; a locking unit having a plurality of locking projections hingedly connected inward to and along a lower end of the sealing unit so that the locking projections can be fixedly caught by a locking flange of the container; and a cover unit having a vertically movable annular body for surrounding an outer peripheral surface of the locking unit, the cover unit including a push projection formed to protrude from an inner peripheral surface of the body and to be positioned below the locking unit, and a support projection formed to protrude at a position above the push projection to support the outer peripheral surface of the locking unit, wherein the locking projections are actuated by axial movement of the cover unit, sealing and unsealing the closure to the container, and wherein the push projection is formed to push a lower end of the locking unit upward when the cover unit is moved upward with respect to the locking unit, so that the locking projections of the locking unit can he released from the locking flange to open the closure.