Container cap

Abstract

The present invention relates to a container cap comprising an inner cap and an outer cap. The inner cap has a second cylindrical portion and a joint portion. The second cylindrical portion has an open top, and a lower side end which is to be inserted into a neck, and which has a plurality of outlet ports for discharging additives. The joint portion protrudes from the outer circumference of the top of the second cylindrical portion and is detachably joined to a stopper protrusion of the neck. The outer cap has a first cylindrical portion and a threaded portion. The first cylindrical portion is slidably coupled to the inner surface of the second cylindrical portion from the inner surface of an upper plate in a surface-contacting manner, and the lower end thereof extends axially to close the plurality of outlet ports. The threaded portion extends axially from the outer surface of the upper plate to be fastened to the outer surface of the neck. When the outer cap is partially opened, said outlet ports are opened to introduce the additives from a receiving space into the main body of a container. When the outer cap is fully opened, the inner cap is separated from the main body of the container together with the outer cap.

1 . A container cap that is detachably combined with a neck that is extended from a container body containing a content and at the uppermost portion of which a neck stopper protrusion is protrudingly formed in which an additive is accommodated in an internal receiving space of the container cap, the container cap comprising:
 an inner cap having a second cylindrical portion whose upper portion is opened in which a number of outlet ports through which the additive is discharged are formed at the lower side end of the second cylindrical portion that is inserted into the inside of the neck, and a joint portion that is protrudingly formed from an outer circumference of an upper end of the second cylindrical portion to surround the neck stopper protrusion of the neck and that is detachably combined with the neck stopper protrusion of the neck; and   an outer cap having a first cylindrical portion that is slidably combined on an inner circumferential surface of the second cylindrical portion from an inner side of an upper plate in a surface-contacting manner and whose lower end is axially extended to block the number of the outlet ports, and a threaded portion that is extended axially from an outer circumference of the upper plate to be screw-engaged with the outer circumference of the neck,   wherein the joint portion of the inner cap comprises;   a first stopper protrusion that is formed on the outer circumference of the inner cap and engaged with a threaded portion stopper protrusion that is disposed on the inner circumferential surface of the leading end of the threaded portion at the time of completely opening the outer cap; and   a second stopper protrusion that is formed on an inner circumferential surface of the leading end of the joint portion and that is detachably combined with the neck stopper protrusion of the neck, and   wherein the number of the outlet ports are opened and thus the additive of the receiving space is input into the inside of the container body, at the time of partially opening the outer cap, and the outer cap is separated from the container body together with the inner cap, at the time of completely opening the outer cap.   
     
     
         2 . The container cap according to  claim 1 , wherein the second cylindrical portion further comprises:
 a number of connecting portions that are extended at intervals at a lower end of the second cylindrical portion to form the number of the outlet ports;   a slant bottom portion whose central portion is protruded into the inside of the receiving space; and   a cylindrical extension portion that is extended axially from the slant bottom portion and is selectively fitted with the lower end of the first cylindrical portion and whose lower end is connected to the lower end of the number of the connecting portions.   
     
     
         3 . The container cap according to  claim 1 , wherein a coupling force between the neck stopper protrusion and the second stopper protrusion is set larger than that between the cylindrical extension portion of the slant bottom portion and the first cylindrical portion, at the time of partially opening the outer cap, and an upward pressure that is applied to the first stopper protrusion by the threaded portion stopper protrusion is set larger than the coupling force between the neck stopper protrusion and the second stopper protrusion, at the time of completely opening the outer cap. 
     
     
         4 . The container cap according to  claim 1 , further comprising an annular small protrusion that is protrudingly formed on the upper surface of the joint portion in order to seal between the upper surface of the joint portion and the lower surface of the upper plate. 
     
     
         5 . The container cap according to  claim 1 , further comprising a sealing extension portion that is extended at the uppermost portion of the second cylindrical portion, and an annular groove that is formed on the lower surface of the first cylindrical portion and into which the sealing extension portion is fitted when the inner cap is completely coupled with the outer cap. 
     
     
         6 . The container cap according to  claim 1 , wherein the inner cap is made of a material of an elastic strain relatively larger than that of the outer cap. 
     
     
         7 . The container cap according to  claim 1 , further comprising an annular small protrusion that is protrudingly formed on the inner circumference of the second cylindrical portion in an annular form and forms a sealing structure between the first and second cylindrical portions. 
     
     
         8 . The container cap according to  claim 1 , further comprising an annular small protrusion that is protrudingly formed on at least one of the outer circumference of the cylindrical extension portion and the inner circumference of the lower end of the first cylindrical portion that is fitted with the outer circumference of the cylindrical extension portion in an annular form, to thus form a sealing structure. 
     
     
         9 . The container cap according to  claim 1 , wherein the neck comprises a male screw thread that is disposed at the lower side of the neck stopper protrusion and that is screw-engaged with the threaded portion, and wherein the neck stopper protrusion is formed of an outer diameter smaller than that of the male screw thread to prevent mutual collision between the joint portion of the inner cap and the threaded portion of the outer cap, when the threaded portion of the outer cap is screw-engaged with the male screw thread at a state where the joint portion of the inner cap is coupled with the neck stopper protrusion. 
     
     
         10 . The container cap according to  claim 1 , further comprising a hemispherical ring-shaped protrusion that is disposed at the upper portion of the threaded portion stopper protrusion in order to form a groove that is snap-coupled with the first stopper protrusion that is formed in the joint portion, at the time of partially opening the outer cap. 
     
     
         11 . The container cap according to  claim 1 , wherein a slope surface or curved surface is formed on an upper surface of the first stopper protrusion of the joint portion so as to be snap coupled with the threaded portion stopper protrusion when the outer cap and the inner cap are coupled with each other, in which a lower surface of the first stopper protrusion of the joint portion is perpendicular to the outer circumferential surface of the joint portion so as to be stop-coupled with the threaded portion stopper protrusion at the time of completely opening the outer cap, and
 wherein a slope surface or curved surface is formed on the lower surface of the threaded portion stopper protrusion so as to be snap coupled with the first stopper protrusion of the joint portion when the outer cap and the inner cap are coupled with each other,   in which the upper surface of the threaded portion stopper protrusion is perpendicular to the inner circumferential surface of the threaded portion so as to be stop-coupled with the first stopper protrusion of the joint portion at the time of completely opening the outer cap.   
     
     
         12 . A container cap that is detachably combined with a neck at the uppermost portion of which an annular neck stopper protrusion is protrudingly formed in which a male screw thread is disposed at the lower side of the neck stopper protrusion, and that comprises an inner cap and an outer cap that make an additive contained in an internal receiving space input into a container body, at the time of partially opening the outer cap, and that are separated together from the container body, at the time of completely opening the outer cap,
 wherein the inner cap comprises: 
 a second cylindrical portion whose upper portion is opened in which a number of outlet ports through which the additive is discharged are formed at the lower side end of the second cylindrical portion that is inserted into the inside of the neck; 
 a number of connecting portions that are extended at intervals at a lower end of the second cylindrical portion to form the number of the outlet ports; 
 a slant bottom portion whose central portion is protruded into the inside of the receiving space and that comprises a cylindrical extension portion whose outer circumference of which is extended axially and whose lower end is connected to the lower end of the number of the connecting portions; and 
 a joint portion that is protrudingly formed from an outer circumference of an upper end of the second cylindrical portion to surround the neck stopper protrusion of the neck and that is detachably combined with the neck stopper protrusion of the neck, in which a first stopper protrusion is formed in an annular form on the outer circumference of the inner cap and a second stopper protrusion is formed on an inner circumferential surface of the leading end of the joint portion so as to be detachably combined with the neck stopper protrusion of the neck, 
 wherein the outer cap comprises: 
 a circular upper plate; 
 a first cylindrical portion that is slidably combined on an inner circumferential surface of the second cylindrical portion from an inner side of the upper plate in a surface-contacting manner and whose lower end is axially extended to block the number of the outlet ports, so as to be coupled with the cylindrical extension portion, to thereby selectively establish the receiving space in a sealed form; and 
 a threaded portion that is extended axially from an outer circumference of the upper plate to be screw-engaged with the male screw thread of the neck, in which a threaded portion stopper protrusion is disposed on the inner circumference of the upper side of the threaded portion so as to be stop-coupled with the first stopper protrusion of the inner cap, at the time of completely opening the outer cap. 
 
     
     
         13 . The container cap according to  claim 12 , wherein an upward pressure that is applied to the first stopper protrusion by the threaded portion stopper protrusion is set larger than a coupling force between the lower surface of the neck stopper protrusion and the second stopper protrusion, at the time of completely opening the outer cap. 
     
     
         14 . The container cap according to  claim 12 , wherein a coupling force between the neck stopper protrusion and the second stopper protrusion is set larger than that between the cylindrical extension portion of the slant bottom portion and the first cylindrical portion, at the time of partially opening the outer cap. 
     
     
         15 . The container cap according to  claim 12 , further comprising an annular small protrusion that is protrudingly formed on the inner circumference of the second cylindrical portion in an annular form and forms a sealing structure between the first and second cylindrical portions.