Patent ID: 9713402
Date: 2017-07-25
CPC Classifications: A47J,B65D

Claim:
1. A container lid for vacuum sealing for maintaining negative pressure in an internal space provided by covering an opened top portion of a container main body and seals, the container lid comprising: a packing-installing groove provided around an internal surface of a lid main body for covering an open upper part of the container main body; a closed-loop shape packing installed in the packing-installing groove and sealing a contacting surface by press-fitting between an opening part of the container main body and the packing-installing groove; a check valve installing part provided on an external surface of the lid main body and within the perimeter of the packing-installing groove; a check valve installed in the check valve installing part and configured for generating negative pressure in the internal space of the container by allowing air inside the container to flow to the outside but preventing outside air from flowing into the container when a pressure difference occurs between the inside and outside of the container in a state that the container lid covers and seals an open upper part of the container main body; a plurality of self catching protrusions provided at two or more portions of an edge of the container lid; and a plurality of locking members, each of which are installed rotatably in portions of the edge of the lid main body neighboring the plurality of the self catching protrusions, wherein each of the plurality of locking members comprises main body locking protrusions preventing the container lid from being detached from the container main body by latching to an edge of the container main body when the negative pressure in the internal space of the container is weakened in a closed state, and a self-locking protrusion preventing the locking member from opening by being press-fitted and engaging the self catching protrusion in the above closed state.