| 摘要 |
PURPOSE:To prevent erroneous use by a method wherein a package comprises an opening part located at a position having a larger diameter than a closing part while the shape of the opening part is made in a form wherein a shape that fingers are to be placed at the time of opening operation is easy to be applied with operating force. CONSTITUTION:A direction of rotation at the time of opening a lid 20 is counterclockwise, and a part 26 for opening is formed so that a wall 27 to be applied with operating force with fingers placed at the time of closing the lid 20 is formed perpendicular, while on its opposite side a horizontal bottom extends to a tilted face of a periphery 25 to be opened. Therefore, when the lid 20 is rotated to a direction to close it, sufficient force can be applied with fingers placed on the wall 27 of the part 26 for opening, but if it is to be rotated in a reverse direction, the fingers cannot be placed on the part 26 for opening but will slip off so that force cannot be applied there. When the lid 20 is to be screwed into an opening 11 of a package 10 and closed, a packing 30 for sealing is interposed between a rear face of the lid 20 and a tip of the opening 11. |
