| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bottle cap capable of holding a storing part stably in an air-tight manner without excessively increasing a plug opening torque for an inner cylindrical member. <P>SOLUTION: A bottle cap 10 is released from a storing part 22 while a bottom lid member is depressed against the lower end of an outer cylindrical part 32 by an operation in which a cap part 26 screwed on an outer cylindrical part 32 is screwed and moved in an opening direction in respect to the outer cylindrical part 32. The bottle cap 10 is constructed such that a contact ring 23 forcedly contacted against the upper end surface 332 of the outer cylindrical part 32 under a state in which the cap part 26 is screwed on the outer cylindrical part 32 is formed around the storing part 22 in a circumferential winding manner within the cap part 26. <P>COPYRIGHT: (C)2010,JPO&INPIT |
