Waterproof prestressing structure of water bottles or cups

Abstract

A waterproof prestressing structure of water bottles or cups, which mainly has a first main body and a second main body, and one surface of an elastic body is integrally provided on the first main body. When the first main body and the second main body are screwed to connect with each other, since the one surface of the elastic body is fixed on the first main body, the one surface of the elastic body connected to the first main body does not deform, and only another surface that contacts the second main body deforms, so that the elastic body does not excessively deform in a tight state, thereby reducing twist or damage of the elastic body caused by screwing. The elastic body is integrally provided on the first main body, so that there is no gap between the elastic body and the first main body.

What is claimed is: 
     
         1 . A waterproof prestressing structure of water bottles or cups including:
 a first main body having a first connecting portion and a first connecting surface;   a second main body having a second connecting portion and a second connecting surface, the second connecting portion being connected to the first connecting portion; and   an elastic body, the elastic body having a first surface and a second surface, the first surface being integrally provided on the first connecting surface, when the first main body and the second main body being combined to connect the first connecting portion with the second connecting portion, the second surface being tightly pressed and abutted against the second connecting surface.   
     
     
         2 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the first surface of the elastic body is integrally formed on the first connecting surface by hot mold opening molding. 
     
     
         3 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the first surface of the elastic body is integrally formed on the first connecting surface by heterogeneous integral molding. 
     
     
         4 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the first surface of the elastic body is integrally formed on the first connecting surface by heterojunction molding. 
     
     
         5 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the elastic body is made of an elastic material. 
     
     
         6 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein a material of the elastic body is silicone rubber. 
     
     
         7 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the first main body has an open accommodating space, and the first connecting portion is an internal screw thread provided in the accommodating space; the second main body includes a cup member and a throat member, the cup member has an inner wall surface facing an internal cup space, the inner wall surface is concavely provided with a ring groove, the throat member is mounted on a cup rim of the cup member, the throat member has a ring rib convexly provided facing the inner wall surface, the ring rib is concavo-convexly combined with the ring groove, so that the throat member and the cup member are fixedly combined with each other, the second connecting portion is provided on the throat member, the second connecting portion is an external screw thread, the second connecting surface is located on the cup member, and the first connecting surface surrounds the cup rim of the cup member. 
     
     
         8 . The waterproof prestressing structure of water bottles or cups as claimed in  claim 1 , wherein the elastic body and the first main body are closely integrated into one body.