Container cap having function of maintaining open state

Abstract

A container cap configured to maintain an open state includes an indication ring prevented from escaping from a container spout; a cap body screw-coupled to an outer circumferential surface of the container spout; a hinge connecting the cap body and the indication ring to each other in a partial section of a circumference of a cut portion between the cap body and the indication ring; and a bridge connecting the cap body and the indication ring at an interval along the circumference of the cut portion and is cut when the cap body is open. The hinge has widthwise opposite edges adjacent to opposite cut portions and depressed from the outer to inner sides thereof, a bending guide groove integrally connected to the cap body, the indication ring, the hinge portion, and a protrusion having a shape extending and protruding downward from a lower part of the widthwise center thereof.

1 . A container cap having a function of maintaining an open state, the container cap comprising:
 an indication ring prevented from escaping from a container spout;   a cap body screw-coupled to an outer circumferential surface of the container spout;   a hinge portion connecting the cap body and the indication ring to each other in a partial section of a circumference of a cut portion disposed between the cap body and the indication ring; and   a bridge which connects the cap body and the indication ring at an interval along a circumference of the cut portion and is cut when the cap body is open,   wherein the hinge portion has widthwise opposite edge parts adjacent to opposite cut portions and depressed from an outer side to an inner side thereof, a bending guide groove formed to be integrally connected to the cap body, the indication ring, and the hinge portion, and a protrusion portion having a shape extending and protruding downward from a lower part of the widthwise center thereof; and the indication ring includes a slit formed in a predetermined section of a middle part in a vertical height direction thereof and a concave portion disposed at a position corresponding to the protrusion portion, adjacent to the protrusion portion while being spaced apart therefrom, and depressed downward.   
     
     
         2 . The container cap of  claim 1 , wherein the bending guide groove has a depth from an outer side to an inner side thereof, and forms an inclined surface having a thickness gradually reduced from a widthwise center of the hinge portion to an outer edge thereof, thereby allowing a part of the bending guide portion adjacent to the cap body in a height direction at the opposite cut portions having a relatively thin thickness to be cut. 
     
     
         3 . The container cap of  claim 1 , wherein a twist groove having a width, a length and a depth defined from an outside to an inside thereof is formed in opposite sides of the indication ring provided at an upper side of the slit on opposite sides of the hinge portion, at least one twist groove is formed along the indication ring, and the twist groove has a predetermined gradient such that one upper end of each twist groove in a longitudinal direction of the twist groove is adjacent to the hinge portion and one lower end of each twist groove is adjacent to a front end of the slit.