Cap for cosmetic case

Abstract

A cap for a cosmetic case is provided. The cap includes a cap body and a sealing member. The cap body is made of a hard material and includes an upper wall, a sidewall extending downwards from an edge of the upper wall, a threaded portion formed on an inner circumference of the sidewall, and a fitting space defined by an inner border surface between the upper wall and the sidewall. The sealing member is press-fitted into the fitting space of the cap body, and exerts or releases a sealing force on or from the mouth of the cosmetic case when the cap body is opened or closed relative to the mouth of the cosmetic case in the threaded fastening method. The sealing member includes a hard circular support plate, and a sealing portion integrally formed on a surface of the circular support plate by insert molding.

1 . A cap for a cosmetic case configured to be opened or closed in a threaded fastening method to seal an upper surface of a mouth of the cosmetic case, the cap comprising:
 a cap body made of a hard material, and comprising:   an upper wall;   a sidewall extending downwards from an edge of the upper wall;   a threaded portion formed on an inner circumference of the sidewall; and   a fitting space defined by an inner border surface between the upper wall and the sidewall; and   a sealing member press-fitted into the fitting space of the cap body, and exerting or releasing a sealing force on or from the mouth of the cosmetic case when the cap body is opened or closed relative to the mouth of the cosmetic case in the threaded fastening method,   wherein the sealing member comprises:   a circular support plate made of a hard material; and   a sealing portion integrally formed on a surface of the circular support plate by insert molding, and coming into elastic contact with the upper surface of the mouth of the cosmetic case.   
     
     
         2 . The cap according to  claim 1 , wherein the sealing portion of the sealing member further comprises:
 a contact groove formed to correspond to a projecting step formed on the upper surface of the mouth of the cosmetic case and thereby to come into close contact with the projecting step while surrounding the projecting step; and   sealing wings integrally formed on both sides of the contact groove.   
     
     
         3 . The cap according to  claim 1 , wherein an outer diameter (D 2 ) of the sealing portion formed on the circular support plate of the sealing member by insert molding is smaller than an outer diameter (D 1 ) of the circular support plate, and is smaller than or equal to a diameter (d 1 ) of a locking step for defining the fitting space, so that, when the sealing member is fitted into the fitting space of the cap body, the step of the circular support plate is locked by the locking step. 
     
     
         4 . The cap according to  claim 1 , further comprising:
 a protrusion ring formed on an inner circumference of the upper wall of the cap body to minimize a contact frictional force against the circular support plate of the sealing member when the cap body is opened or closed.   
     
     
         5 . The cap according to  claim 4 , wherein the protrusion ring formed on the cap body is aligned with the mouth on a vertical axis such that the sealing portion of the sealing member directly presses the upper surface of the mouth of the cosmetic case when the cap body is closed. 
     
     
         6 . The cap according to  claim 1 , wherein the circular support plate of the sealing member is cut at an upper corner thereof to form an inclined guide surface, the inclined guide surface enabling an easier fitting operation when the sealing member is forcibly press-fitted into the fitting space of the cap body.