Sealing structure of bottle cap

Abstract

The invention relates to a sealing structure of a bottle cap, which comprises a bottle opening and a cap body. The outer peripheral surface of the bottle opening is connected with the inner peripheral surface of the cap body in a threaded manner, an anti-counterfeiting ring is connected to the lower end of the cap body, a convex ring is disposed on the outer peripheral surface of the lower portion of the bottle opening and positioned between the lower end surface of the cap body and the anti-counterfeiting ring, at least one side sealing ring is arranged on the inner upper end surface of the bottle cap, the inner side surfaces or / and the outer side surfaces of the side sealing rings are abutted to the top end of the bottle opening, the inner peripheral surface of the lower portion of the cap body is a conical surface, the upper end surface of the convex ring is an oblique surface, and the inner peripheral surface of the lower portion of the cap body is abutted to the upper end surface of the convex ring. The sealing structure of the bottle cap has the advantages that the lower portion of the bottle opening is sealed, accordingly, impurities such as dust and the like are prevented from entering a gap between the bottle opening and the cap body from a space between the lower portion of the bottle opening and the cap body, growth of bacteria is prevented, and service sanitation is guaranteed. In addition, the upper portion of the bottle opening can be more effectively sealed by the aid of the sealing structure.

Description

technical field [0001] The invention relates to a sealing structure of a bottle cap, in particular to a sealing structure of a screw cap type bottle cap. Background technique [0002] Most of the structures of currently used bottle caps are as figure 2 As shown, it includes a bottle mouth 1 and a cover body 2, the outer peripheral surface of the bottle mouth 1 is threadedly connected with the inner peripheral surface of the cover body 2, and a sealing ring 3 is provided between the inner upper surface of the cover body 2 and the top end surface of the bottle mouth 1, and the cap body The lower end of the body 2 is connected with an anti-counterfeiting ring 4, and the outer peripheral surface of the lower part of the bottle mouth 1 is provided with a protruding ring 5, and the protruding ring 5 is located in the ring groove 6 formed by the lower end surface of the cover body 2 and the anti-counterfeiting ring 4. When it is in use, the cap body 2 is screwed tightly so that th...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the above-mentioned bottle cap structure are: 1. Since the lower part of the bottle mouth 1 is not sealed, dust and other sundries will enter the gap 7 between the bottle mouth 1 and the cover body 2 from the bottom of the bottle mouth 1 and the cover body 2, causing Bacterial growth affects the use; 2. The sealing structure on the upper part of the bottle mouth 1 is not very reliable. For the bottle cap with the above structure, after the cover body 2 and the bottle mouth 1 are tightened, the gap between the upper end surface of the cover body 2 and the top surface of the bottle mouth 1 The distance between them is a fixed value, and the sealing can only be realized when the thickness of the sealing ring 3 is completely equal to this fixed value. The fixed values ​​are equal, resulting in a poor seal on the upper part of the mouth 1

Images