Leakage-proof bottle cap

Abstract

The invention provides a leakage-proof bottle cap, which comprises a cap surface and a circumferential wall downwards extending along the edge of the cap surface, wherein a long bulge which downwards extends and is sealed along the circumferential direction is concentrically arranged on the inner top surface of the cap surface, and a sealing part tightly abutted against and matched with the inner side edge of the upper end part of a bottle opening is arranged on the outer periphery of the upper end part of the long bulge. The leakage-proof bottle cap has the advantages that the sealing part tightly abutted against and matched with the inner side edge of the upper end part of the bottle opening is arranged on the outer periphery of the upper end part of the long bulge arranged in the existing bottle cap, so that the inner wall of the bottle opening and the upper end part of the long bulge are tightly abutted against and matched for forming sealing connection, the long bulge can be effectively prevented from generating offset when the bottle cap suffers the side surface impact, and the sealing performance of the bottle cap is ensured.

Description

technical field [0001] The invention relates to a bottle cap, in particular to a leak-proof bottle cap resistant to side impact. Background technique [0002] As the bottle caps are becoming more and more lightweight, the cover surface of the bottle caps is getting thinner and thinner, which will cause problems during use. Such as figure 1 As shown, the leak-proof bottle cap of the prior art includes a cover surface 1 and a peripheral wall 2 extending downward along the edge of the cover surface. The inner top surface of the cover surface 1 is concentrically provided with a long protrusion 3 extending downward and closed in the circumferential direction. . After the cap is tightened on the bottle mouth 4, there is a certain gap between the upper end of the long convex and the inner edge of the upper end of the bottle mouth 4, as figure 2 shown. After repeated tests by the inventor, after the bottle cap locks the bottle mouth 4, when the bottle cap encounters a side impa...

AI Technical Summary

Problems solved by technology

After repeated tests by the inventor, after the bottle cap locks the bottle mouth 4, when the bottle cap encounters a side impact, the position of the long protrusion 3 may be shifted, and in severe cases, it may cause air leakage, water leakage, etc., which is harmful to the bottle. Beverage safety poses hidden dangers

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