Refillable container

Abstract

Provided is a refillable container that has a simple structure and is convenient to use. The refillable container may include: an outer container having a coupling protrusion; and an inner container configured to be inserted into the outer container and separably coupled to the coupling protrusion, where the coupling protrusion comprises a mounting indentation and a detent hole, the mounting indentation having an open top and having a particular depth, the detent hole formed below the mounting indentation with a particular distance in-between, and the inner container comprises a mounting protrusion and a detent hook, the mounting protrusion configured to be inserted into the mounting indentation, the detent hook configured to be inserted into the detent hole.

What is claimed is: 
     
         1 . A refillable container comprising:
 an outer container having a coupling protrusion; and   an inner container configured to be inserted into the outer container and separably coupled to the coupling protrusion,   wherein the coupling protrusion comprises a mounting indentation and a detent hole, the mounting indentation having an open top and having a particular depth, the detent hole formed below the mounting indentation with a particular distance in-between,   and the inner container comprises a mounting protrusion and a detent hook, the mounting protrusion configured to be inserted into the mounting indentation, the detent hook configured to be inserted into the detent hole.   
     
     
         2 . The refillable container of  claim 1 , wherein an outwardly protruding flange is formed on an upper end of the inner container, and the mounting protrusion protrudes further outward compared to the flange. 
     
     
         3 . The refillable container of  claim 1 , wherein the detent hook is formed on an end portion of a detent piece, and the detent piece is separated by a particular distance from an outer periphery of the inner container. 
     
     
         4 . The refillable container of  claim 3 , wherein an outwardly protruding flange is formed on an upper end of the inner container, and the detent piece is formed on a lower portion of the flange. 
     
     
         5 . The refillable container of  claim 1 , wherein a lower end of the mounting protrusion is rounded.