Molded paper pulp cup cover and connecting structure for cup cover plate and flip cover

Abstract

A connecting structure for a molded paper pulp cup cover comprising a tearable turnover flip cover integrally formed with and arranged on a cup cover plate, where a drinking hole is formed after the flip cover is overturned. The rear side of the flip cover is connected to the hole wall of the drinking hole by at least one turnover stress connection point; the circumferential side edge of the flip cover is connected to the drinking hole by a tear line that comprises a U-shaped section and arc-shaped sections located at the two ends of the U-shaped section; tearable connecting points are formed between the U-shaped section and the arc-shaped sections and a vertical distance from the tearable connecting points to the bottom of the U-shaped section is greater than a vertical distance from the tearable connecting points to the turnover stress connecting points.

1 . A connecting structure for a molded paper pulp cup cover plate having a flip cover, the molded paper pulp cup cover comprising:
 a cup cover plate;   a tearable turnover flip cover which is integrally formed with the cup cover plate and arranged on the cup cover plate; and   a drinking hole which is formed in the cup cover plate after the tearable turnover flip cover is overturned relative to the cup cover plate;   wherein a rear side of the tearable turnover flip cover is connected to the hole wall of the drinking hole by means of at least one turnover stress connection point, and a circumferential side edge of the tearable turnover flip cover is connected to the drinking hole by means of a tear line, characterized in that;   the drinking hole is a tapered drinking hole of which an inner diameter gradually reduces from top to bottom;   the tear line comprises a U-shaped section, hinged on a side away from the side of the turnover stress connecting point, and arc-shaped sections located at the two ends of the U-shaped section;   tearable connecting points are formed between the U-shaped section and the arc-shaped sections, wherein the two tearable connecting points are symmetrically distributed with respect to the axis line of the drinking hole; and   a vertical distance  1  from the tearable connecting points to the bottom of the U-shaped section is greater than a vertical distance  2  from the tearable connecting points to the turnover stress connecting points.   
     
     
         2 . The connecting structure for a molded paper pulp cup cover plate and a flip cover according to  claim 1 , characterized in that the circumferential side edge of the tearable turnover flip cover is an inclined side edge arranged outward from top to bottom. 
     
     
         3 . The connecting structure for a molded paper pulp cup cover plate and a flip cover according to  claim 2 , characterized in that the circumferential side edge and the hole wall of the drinking hole form an acute angle. 
     
     
         4 . The connecting structure for a molded paper pulp cup cover plate and a flip cover according to  claim 2 , characterized in that the circumferential side edge and the hole wall of the drinking hole form a right angle or an obtuse angle. 
     
     
         5 . The connecting structure for a molded paper pulp cup cover plate and a flip cover according to  claim 1 , characterized in that the drinking hole is one of a round, oval and square shape. 
     
     
         6 . The connecting structure for a molded paper pulp cup cover plate and a flip cover according to  claim 1 , characterized in that rear side of the tearable turnover flip cover is connected to the hole wall of the drinking hole through two turnover stress connection points which are arranged at intervals. 
     
     
         7 . A molded paper pulp cup cover, comprising:
 a cup cover plate having an annular part which is connected to an outer fringe of the cup cover plate and is integrally formed with the cup cover plate;   a tearable turnover flip cover which is integrally formed with the cup cover plate and arranged on the cup cover plate; and   a drinking hole which is formed in the cup cover plate after the tearable turnover flip cover is overturned relative to the cup cover plate;   wherein a rear side of the tearable turnover flip cover is connected to the hole wall of the drinking hole by means of two turnover stress connection points which are arranged at intervals, and a circumferential side edge of the tearable turnover flip cover is connected to the drinking hole by means of a tear line, characterized in that;   the drinking hole is a tapered drinking hole of which an inner diameter gradually reduces from top to bottom;   the circumferential side edge of the tearable turnover flip cover is an inclined side edge arranged outward from top to bottom;   the cup cover plate is provided with a downward concave formed flip cover clamping groove; and   the tearable turnover flip cover is clamped in the flip cover clamping groove after being overturned relative to the cup cover plate.   
     
     
         8 . The molded paper pulp cup cover according to  claim 7 , characterized in that the tearable turnover flip cover includes a closing plate body, an upward convex contact protrusion is arranged on the upper surface of the closing plate body, and a formed groove corresponding to the contact protrusion is arranged on the lower surface of the closing plate body. 
     
     
         9 . The molded paper pulp cup cover according to  claim 8 , characterized in that the contact protrusion is provided with a contact surface inclined forward from top to bottom, and a slope surface connected between the top side of the contact surface and the upper surface of the closing plate body, and the flip cover clamping groove has a fitting surface  1  that matches with the contact surface and a fitting surface  2  that matches with the slope surface. 
     
     
         10 . The molded paper pulp cup cover according to  claim 7 , characterized in that the tear line comprises:
 a U-shaped section, hinged on a side away from the side of the turnover stress connecting point and arc-shaped sections located at the two ends of the U-shaped section;   tearable connecting points formed between the U-shaped section and the arc-shaped sections, wherein the two tearable connecting points are symmetrically distributed with respect to the axis line of the drinking hole; and   a vertical distance  1  from the tearable connecting points to the bottom of the U-shaped section that is greater than a vertical distance  2  from the tearable connecting points to the turnover stress connecting points.