| 摘要 |
PROBLEM TO BE SOLVED: To prevent, in a locking mechanism including a locking body 3 and an operation body 4 in a plug 1 installed to a liquid container and provided with a flapping rotary lid 2, an improper force to the operation body 4 from acting on the locking body 3 by allowing the closing of the lid even when the operation body is shifted to a lock position.SOLUTION: A lower portion of a locking body 3 is swingably attached to a shaft 5 to constitute a lid locking structure. A rotation locking structure is constituted by an end surface of a side portion 42 in an operation body 4, the operation body including a pressing surface portion 41 located in front of the locking body 3 and the side portion 42, and being installed to the shaft 5 in such a manner as to be swingable and vertically movable, and a rotation arresting projection 14 formed on the inner surface of a side wall 13 at a position which faces the end surface of the side portion when the operation body 4 is moved upward. |
