Cap and container with cap

摘要

In a bottle cap (10), a bottom cover member (40) is separated from an accommodation portion (22) while an outer peripheral wall (44) of an annular groove is pressed against a lower end surface (39) of an outer cylinder member (30) when a cap portion (26) that is threadedly mounted on the outer cylinder member (30) threadedly advances in an opening direction with respect to the outer cylinder member (30). The lower end surface (39) of the outer cylinder member (30) is inclined downward and outward. A ridge (45) is integrally formed with an upper edge of the outer peripheral wall (44) of the annular groove by the same material as that of the outer peripheral wall (44), where the ridge (45) is pressed against the lower end surface (39) of the outer cylinder member (30) while the cap portion (26) is threadedly mounted on the outer cylinder member (30).

主权项

1. A cap comprising:
an inner cylinder member which includes a cylindrical accommodation portion having an open lower end so as to accommodate an input material therein and a cap portion sealing an upper end of said accommodation portion; an outer cylinder member which includes an outer cylinder portion allowing said accommodation portion to be inserted therein by attachably/detachably and threadedly mounting said cap portion on an open upper end and allowing an open lower end to be inserted into a container opening together with said accommodation portion, and which is mounted on said container opening; and a bottom cover member which includes an annular groove, in which a lower end of said accommodation portion is raised more than said outer cylinder portion so as to be attachably/detachably press-inserted into said annular groove to be fitted thereto, thereby sealing said accommodation portion, wherein when said cap portion that is threadedly mounted on said outer cylinder member threadedly advances in an opening direction with respect to said outer cylinder member, an outer peripheral wall of said annular groove is pressed down by a lower end surface of said outer cylinder member, so that said bottom cover member is separated from said accommodation portion, wherein said lower end surface of said outer cylinder member is inclined so as to be lower toward the outside in a radial direction, and wherein a ridge is integrally formed on an upper edge of said outer peripheral wall of said annular groove by the same material as that of said outer peripheral wall, said ridge being pressed against said lower end surface of said outer cylinder member while said cap portion is threadedly mounted on said outer cylinder member; wherein a swollen portion is inwardly formed in an inner wall surface of said upper edge of said outer peripheral wall, said swollen portion engaging with said lower end of said accommodation portion when said lower end of said accommodation portion is fitted into said annular groove, wherein said ridge is protruded further upward than said swollen portion.