Airtight container

Abstract

A hermetically sealed container comprises sealing mechanisms ( 17, 17 a ) wherein upper sealing surfaces ( 11, 11 a ) and lower sealing surfaces ( 12, 12 a ) are provided in inward peripheral wall surfaces ( 9, 9 a ) and outward peripheral wall surfaces ( 10, 10 a ), respectively, of annular sealing grooves integrally formed with a container body ( 3 ) misaligned from each other in the height direction of the container body, and upper sealing parts ( 15, 15 a ) and lower sealing parts ( 16, 16 a ) are provided respectively in upper parts ( 13, 13 a ) and lower parts ( 14, 14 a ) of annular sealing protrusions formed integrally with a lid body ( 6 ), and the upper parts of the annular sealing protrusions are formed to be of high rigidity to make the upper sealing parts frictionally contact the upper sealing surfaces, and the lower parts of the annular sealing protrusions are formed to be flexibly deformable and of low rigidity to make the lower sealing parts be resiliently pressed against the lower sealing surfaces.

1 . A hermetically sealed container configured to hermetically seal an inside of a synthetic resin container body by inserting an annular sealing protrusion, which is provided integrally with either said container body or a synthetic resin lid body for opening and closing said container body, into an annular sealing groove provided integrally in the other of said two sections, said hermetically sealed container having a sealing mechanism comprising: 
 an upper sealing surface provided on either an inward peripheral wall surface or an outward peripheral wall surface of said annular sealing groove, said outward surface and said inward surface being opposed to and spaced from each other;    a lower sealing surface provided on the other one of said inward surface or said outward surface misaligned from said upper sealing surface in a direction of the height of said container body; and    an upper sealing part and a lower sealing part provided in an upper part and a lower part of said annular sealing protrusion in the direction of the height of said container body, said upper sealing part and said lower sealing part corresponding to said upper sealing surface and said lower sealing surface, respectively,    wherein the upper part of said annular sealing protrusion is formed to be of high rigidity to make said upper sealing part frictionally contact said upper sealing surface, and the lower part of said annular sealing protrusion is formed to be flexibly deformable and of low rigidity to make said lower sealing part be resiliently pressed against said lower sealing surface.    
     
     
         2 . A hermetically sealed container as claimed in  claim 1 , wherein a gap which allows deformation of the upper part of said annular sealing protrusion is formed between the upper part of said annular sealing protrusion and either said inward peripheral wall surface or said outward peripheral wall surface that is provided with said lower sealing surface.  
     
     
         3 . A hermetically sealed container as claimed in  claim 1  or  2 , wherein a plurality of said sealing mechanisms are provided.