Lid is easily torn to abnormal shape

The utility model discloses a lid is easily torn to abnormal shape, a serial communication port, including injecting glue circle lid and aluminium foil, through adhesive material sealing connection between injecting glue circle lid and the aluminium foil, injecting glue circle lid is including first step face, second step face and the opening on second step face, the neighboring of first step face includes the straight flange structure of downwardly extending formation, the deep -draw hypotenuse that includes the circular arc transitional coupling between first step face and the second step face, the opening neighboring of second step face is including upwards extending the turn -up structure that forms. The utility model discloses can make the aluminium foil lid tear more easily, improve the convenience of its use. In addition, the aluminium foil of this structure lid is for the aluminium foil substrate, and is thin as a piece of paper because of very, can not form acute angle or obtuse angle, and horse mout