Abrasive block unit for nail art

Abstract

An abrasive block unit for nail art is disclosed. The abrasive block unit for nail art includes at least one abrasive board for filing user nail for nail art, which comes in contact with the nail and is formed of an abrasive material, and a core block including at least one inserting groove formed therein and enabling shrink fit of the abrasive board such that the abrasive board is coupled to the core block without an adhesive member.

What is claimed is: 
     
         1 . An abrasive block unit for nail art, comprising:
 at least one abrasive board for filing user nail for nail art, which comes in contact with the nail and is formed of an abrasive material; and   a core block comprising at least one inserting groove formed therein and enabling shrink fit of the abrasive board such that the abrasive board is coupled to the core block without an adhesive member.   
     
     
         2 . The abrasive block unit according to  claim 1 , wherein:
 the core block comprises a pair of inserting groves formed to face each other across a central portion of the core block; and   the abrasive board is configured to be a pair such that abrasive boards are coupled to the pair of inserting groves, respectively.   
     
     
         3 . The abrasive block unit according to  claim 1 , wherein the abrasive board comprises:
 a sponge portion formed of a flexible material; and   an abrasive portion formed on a surface of the sponge portion so as to increase surface roughness of the sponge portion.   
     
     
         4 . The abrasive block unit according to  claim 1 , wherein the core block has an external surface having a concave round shape corresponding to a convex external surface of a finger such that a user easily grasps the core block with the finger. 
     
     
         5 . The abrasive block unit according to  claim 1 , further comprising a flange portion for limiting the inserting groove of the core block is configured in such a way that an interval between internal side surfaces that face each other is gradually increased toward a central portion of the core block so as to enable shrink fit of the abrasive board.