To provide an open/close structure of an inner plug of a bottle, allowing a user to see the inside of the plug completely by widely opening an open/close cap having a lever member up to 90°, thereby cleaning the whole of the inner plug easily and cleanly.
An open/close cap 1, which is supported at an upper portion 11 of an inner plug body 10 so as to be opened/closed, includes a lever member 2 disposed vertically on a lower surface 6 thereof. The lever member 2 of the open/close cap 1 is rotatable in a circular arc shape, while sliding toward an end 22 of a vertical rod 21. The lever member 2, which moves along with open/close operation of the open/close cap 1, presses the end 22 of the vertical rod 21, while a valve member 20 is opened/closed gradually. The whole of the open/close cap 1 is rotatable from a horizontal, closed state to a 90° fully opened state.
Osamu Shoji
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