| 摘要 |
A bottle cap for preventing intrusion of foreign materials includes an inner cover having an accommodating portion placed on an opening of a bottle (1) and a lower protruding portion (12) inserted into the opening of the bottle, wherein a lower guide portion (14) is formed in the lower protruding portion and a main inflow hole (13) through which liquid flows is formed at a lower end of the lower guide portion, an outer coupling cover (20) coupled to the protruding portion of the bottle forming a seal while accommodating the inner cover, wherein an upper guide portion (24) corresponding to the lower guide portion and at least one flow hole (23) having a diameter less than that of the upper guide portion are formed in the outer coupling cover, and a threaded portion (21) is formed at the outer circumferential surface of the outer coupling cover, a valve member (30) interposed between the lower guide portion and the upper guide portion to be capable of moving and having a first blocking protrusion (33) for blocking the main inflow hole, and a screw-off cover (40) for accommodating the outer coupling cover by being coupled to the threaded portion of the outer coupling cover. |
