Structure for airtight sealing a bottle and bottle cap

Abstract

A bottle sealing structure is formed of a bottleneck, a cap, and a sealing ring. The bottleneck is provided in the outer wall with an outer threaded portion and a retaining ring. The cap is provided in the inner wall with an inner threaded portion, which is engaged with the outer threaded portion of the bottleneck. The sealing ring is attached to the bottom end of the cap by a plurality of connection points, which are separated from one another by a plurality of gaps. The gaps are provided with a protrusion to support the bottom end of the cap. The sealing ring is provided along the bottom fringe with a retaining portion which is retained by the retaining ring of the bottleneck.

I claim:  
     
         1 . A bottle sealing structure comprising: 
 a bottleneck provided in an outer wall with an outer threaded portion;    a cap provided in an inner wall with an inner threaded portion which is engaged with said outer threaded portion of said bottleneck; and    a sealing ring attached to a bottom end of said cap by a plurality of connection points which are arranged at intervals and are separated from one another by a plurality of gaps;    wherein said bottleneck is further provided in the outer wall with a retaining ring whereby said retaining ring is located under said outer threaded portion; wherein said sealing ring is provided along a bottom fringe with a retaining portion whereby said retaining portion is retained by said retaining ring of said bottleneck.    
     
     
         2 . The bottle sealing structure as defined in  claim 1 , wherein said retaining ring of said bottleneck is provided in an upper side with an inclined plane whereby said inclined plane serves as a guiding surface to facilitate the retaining of said retaining portion of said sealing ring by said retaining ring of said bottleneck.  
     
     
         3 . The bottle sealing structure as defined in  claim 1 , wherein said gaps are provided with a supporting protrusion in contact with said bottom end of said cap.