| 摘要 |
<p>Disclosed is a bottle cap that prevents contents from being refilled in a bottle by displaying an opened state in such a manner that a wing hung in the bottom of the cap by rack and pinion is taken out when the cap is opened. The bottle cap includes a cap covering a nozzle of a bottle in a state that it is engaged with a screw formed on the outer surface of the nozzle, having a rod provided with a rack on the outer surface, a pinion engaged with the rack formed in the rod of the cap and rotated by straight movement of the rod, a driving gear engaged with the pinion, and a wing having a rack engaged with the driving gear the upper portion, driven in a straight direction by rotation of the driving gear.</p> |
