Airtight container

Abstract

An airtight container comprises a receiver, a cover and a sealing ring. The cover comprises an opening. The sealing ring is used to block a gap between the cover and the receiver when the cover is used for closing or sealing an inlet of the receiver. A valve part is used to close or seal the opening. The valve part comprises a tunnel and a valve to close or seal the tunnel. The valve extends from the valve part into the tunnel and has a thickness decreasing from the valve part to a center of the tunnel so as to form a concave surface at a side of the valve facing away from the tunnel. The valve can be opened by air leaving the receiver.

What is claimed is: 
     
         1 . An airtight container comprising:
 a receiver defining a space therein for receiving and an inlet for entry of the space;   a cover used to close the inlet of the receiver, the cover comprising an opening to spatially communicate the space of the receiver with an outside of the container; and   a valve part used to close the opening of the cover, and comprising a tunnel formed therein to extend through the valve part for spatially communicating the space of the receiver with the outside of the container, and a valve extending from the valve part into the tunnel so as to close the tunnel at a center of the tunnel, a thickness of the valve defined along an extending direction of the tunnel decreasing from the valve part toward the center of the tunnel so as to form a concave surface at a side of the valve facing away from the tunnel.   
     
     
         2 . The airtight container according to  claim 1 , wherein the concave surface of the valve is a triangular prism concave surface. 
     
     
         3 . The airtight container according to  claim 1 , wherein another side of the valve facing the funnel is formed as a selective one of the group consisting of a flat surface and a convex surface. 
     
     
         4 . The airtight container according to  claim 1 , wherein the cover comprises an upper portion, a lower portion and a trench formed between the upper portion and the lower portion, a size of the upper portion and a size of lower portion are both larger than a size of the opening of the cover. 
     
     
         5 . The airtight container according to  claim 1 , wherein the valve is formed by at least three divided sections. 
     
     
         6 . The airtight container according to  claim 5 , wherein the valve is formed by four divided sections, two of the four sections are opposite to each other and spaced from each other while the other two sections are opposite to each other and engaged with each other at a center of the valve. 
     
     
         7 . The airtight container according to  claim 6 , wherein a linear slit is formed at the center of the valve between the two engaged sections of the valve. 
     
     
         8 . The airtight container according to  claim 1 , wherein the valve is made by a material same as the valve part. 
     
     
         9 . The airtight container according to  claim 8 , wherein the valve part is made of one of plastics, silicone, rubber, thermoplastic rubber (TPR) and polyethylene (PE).