| 摘要 |
PROBLEM TO BE SOLVED: To facilitate an operation for detaching a cover body from a used container, and prevent the cover body from being accidentally detached due to a container user's involuntary operation. SOLUTION: Inward ribs 11a and 11b and an operation part 11d are formed in an outside cylindrical part 11 of the cover body 1; and a protrusive part 12c, which is fitted into the container 2, is formed in an inside cylindrical part 12 having a chipped range 12a. On account of being apart from the cylindrical part 12, first, the inward rib 11a is displaced to abut on an outer peripheral surface 12b of the cylindrical part 12 when the operation part 11d is pressed; and after that, a further pressing operation makes the cylindrical part 12 deformed, so as to lower the degree of the fitting of a deformed part into a container body 2. In this pressing operation, an upward force is applied to the cylindrical part 11 from a shoulder slope 21 of the container 2. Even if the container user involuntarily presses the operation part 11d, an action for deforming the cylindrical part 12 is not attained after the inward rib 11a abuts on the cylindrical part 12, because a weak pressing force is applied in a short time in ordinary cases. |
