Cosmetic Box and Usage Method of Putting Plastic Pin to Pivotally Couple Cover and Base Thereof

Abstract

A cosmetic box includes a cover including a block on an underside, the block having an axial channel; a base including a groove on one side, the groove being complimentarily shaped to the block, and two opposite through apertures, each extending from an outer surface of the base to either end of the groove; and at least one plastic pin including two convex portions at two ends respectively, and two transitional members, each around the convex portion. The block is disposed in the groove. The at least one plastic pin is inserted through one through aperture, the axial channel, and the other through aperture to pivotally couple the cover and the base together.

What is claimed is: 
     
         1 . A cosmetic box comprising:
 a cover including a block on an underside, the block having an axial channel;   a base including a groove on one side, the groove being complimentarily shaped to the block, and two opposite through apertures, each extending from an outer surface of the base to either end of the groove; and   at least one plastic pin including two convex portions at two ends respectively, and two transitional members, each around the convex portion;   wherein the block is disposed in the groove, and the at least one plastic pin is inserted through one through aperture, the axial channel, and the other through aperture to pivotally couple the cover and the base together.   
     
     
         2 . The cosmetic box of  claim 1 , wherein the plastic pin is made of plastic. 
     
     
         3 . The cosmetic box of  claim 1 , wherein corners of the cover are rounded or chamfered, and corners of the base are rounded or chamfered. 
     
     
         4 . A usage method of putting a plastic pin to pivotally couple a cover and a base of a cosmetic box, wherein the plastic pin is a solid cylinder having two convex portions at two ends respectively, and two transitional members each around the convex portion, the usage method comprising the following step: the plastic pin being inserted through a through aperture of the cover and a channel of the base so as to pivotally couple the cover and the base of the cosmetic box together.