Cup having lid separation preventing function

Abstract

The present invention relates to a cup having a lid separation prevention function including a cup body responsible for containing contents and provided with a sealing part for sealing; a lid positioned at the upper end of the cup body to cover the sealing part; a cup fastening part formed to extend from the top of the cup body and configured to fix the position of the lid; and a lid separation preventing part formed to extend downward from the cup fastening part and configured to prevent the lid from being separated due to deformation of the cup fastening part due to internal shrinkage of the cup body. The position of the lid separation preventing part is changed by a predetermined angle due to deformation of the cup fastening part due to internal shrinkage of the cup body to prevent the lid from being separated from the cup fastening part.

1 . A cup having a lid separation prevention function, comprising:
 a cup body responsible for containing contents and provided with a sealing part for sealing,   a lid positioned at an upper end of the cup body to cover the sealing part;   a cup fastening part formed to extend from a top of the cup body and configured to fix a position of the lid; and   a lid separation preventing part formed to extend downward from the cup fastening part and configured to prevent the lid from being separated due to deformation of the cup fastening part due internal shrinkage of the cup body,   wherein a position of the lid separation preventing part is changed by a predetermined angle due to deformation of the cup fastening part due to internal shrinkage of the cup body to prevent the lid from being separated from the cup fastening part.   
     
     
         2 . The cup according to  claim 1 , wherein a phenomenon that an outermost diameter of the cup fastening part with respect to the lid is narrowed due to deformation of the cup fastening part occurs, a position of the lid separation preventing part is changed by a predetermined angle to alleviate the phenomenon. 
     
     
         3 . The cup according to  claim 2 , wherein, when the cup fastening part of a cup opening comprising the cup fastening part is deformed, an angle of the lid separation preventing part is changed so that a diameter (D 2 ) of an outermost portion of the cup opening after shrinking corresponds to a diameter (D 1 ) of an outermost portion of the cup opening before shrinking. 
     
     
         4 . The cup according to  claim 1 , wherein the cup fastening part is provided in a flange shape at an upper end of the cup, and the lid separation preventing part is formed to extend downward from an outer circumferential end of the flange-shaped cup fastening part,
 wherein the lid separation preventing part is configured to be perpendicular to the cup fastening part while extending toward a lower portion of the cup fastening part, and comprises an outer circumferential surface contacting an inner circumferential surface of the lid and an inner circumferential surface formed to be inclined with respect to the outer circumferential surface.   
     
     
         5 . The cup according to  claim 2 , wherein the cup fastening part is provided in a flange shape at an upper end of the cup, and the lid separation preventing part is formed to extend downward from an outer circumferential end of the flange-shaped cup fastening part,
 wherein the lid separation preventing part is configured to be perpendicular to the cup fastening part while extending toward a lower portion of the cup fastening part, and comprises an outer circumferential surface contacting an inner circumferential surface of the lid and an inner circumferential surface formed to be inclined with respect to the outer circumferential surface.   
     
     
         6 . The cup according to  claim 3 , wherein the cup fastening part is provided in a flange shape at an upper end of the cup, and the lid separation preventing part is formed to extend downward from an outer circumferential end of the flange-shaped cup fastening part,
 wherein the lid separation preventing part is configured to be perpendicular to the cup fastening part while extending toward a lower portion of the cup fastening part, and comprises an outer circumferential surface contacting an inner circumferential surface of the lid and an inner circumferential surface formed be inclined with respect to the outer circumferential surface.   
     
     
         7 . The cup according to  claim 4 , wherein an edge is formed at a lower portion of the lid separation preventing part by presence of the outer and inner circumferential surfaces. 
     
     
         8 . The cup according to  claim 1 , wherein, as an end of the lid separation preventing part widens outward of the cup, a diameter (D 1 ) of an outermost portion of the cup opening before shrinking and a diameter (D 2 ) of an outermost portion of the cup opening after shrinking become equal to each other, and contact between the lid separation preventing part and the lid is maintained so that the lid is prevented from being separated from an upper end of the cup.