Cup lid easy to discharge internal gas

Abstract

A cup lid for easy discharge of internal gas which seals the upper portion of the cup body and discharges the internal gas of the cup body to the outside as the internal gas pressure of the cup body increases. The cup lid includes a cover portion that is detachably coupled to an upper portion of the cup body and has a circulation groove formed at one end thereof; a seal that protrudes from the lower end of the cover portion and is coupled to the upper end of the cup body; and an outlet that is coupled to the circulation groove for discharging the gas inside the cup body to the outside.

What is claimed is: 
     
         1 . A cup lid coupled to a cup body to seal the cup body and discharges a gas remaining in the cup body, comprising: a cover portion detachably coupled to an upper portion of the cup body and having a circulation groove formed at one end thereof and an outflow hole penetrated in the circulation groove; a seal protruding from a lower end of the cover portion and coupled to the upper portion of the cup body; and an outlet coupled to the circulation groove for discharging the gas inside the cup body to the outside. 
     
     
         2 . The cup lid of  claim 1 , wherein the outlet is accommodated in the circulation groove and placed on a top of the outflow hole; and the outlet comprises an open/close membrane having a first end attached to the upper surface of the circulation groove and a second end placed on the circulation groove; and a cap inserted into the circulation groove to cover the open/close membrane and a discharge hole penetrated therethrough. 
     
     
         3 . The cup lid of  claim 2 , wherein the cap comprises a fixing member formed to protrude in a lower portion of the cap and supports an upper surface of the first end of the open/close membrane. 
     
     
         4 . The cup lid of  claim 1 , wherein the seal comprises a first coupling member protruding downward from an edge of the cover portion; a second coupling member protruding toward an inner side of the first coupling member at a predetermined interval; and a third coupling member protruding toward the second coupling member from one end of the first coupling member.