| 摘要 |
PROBLEM TO BE SOLVED: To provide a container lid made of synthetic resin composed of an inner plug fixed to a neck part of a container and a lid main body fixed to the inner plug, which allows a passage opening to be produced in a blocking wall of the inner plug without causing sanitary problems by contacting a finger with the blocking wall of the inner plug and without producing so-called chips.SOLUTION: A thin-walled breakable line to be formed on a blocking wall 6 of an inner plug 2 is formed to have an arc-shaped outer part 16b and an arc-shaped inner part 16c extending from a breakage starting end part 16a, and specifies an arc-shaped deformation region 18. Locked means 22 is mounted in the deformation region and locking means is arranged in the lid main body. When the lid main body is rotated in a predetermined direction relative to the inner plug, the locking means is locked on the locked means, and when rotated further, force is applied to the deformation region through the locking means and the locked means, the thin-walled breakable line of the inner plug is broken and the deformation region is deformed, thereby producing a passage opening on the blocking wall of the inner plug. |
