| 摘要 |
In a cap with valve, an annular projection is formed at an inner circumference of a fluid flow path of a cap body to be installed at an opening portion of a container. A valve body is an annular body and provided with an inner circumferential lip element projecting upward at inner circumferential edge and an outer circumferential lip element projecting downward at outer circumferential edge, and the outer circumferential lip element abuts on the annular projection of the cap body. A first disk-shaped support plate is arranged at upper side of the valve body and provided with a support member supporting the upper surface side of the outer circumferential lip element. The first support plate is biased downward by a first spring means from upper side. A second support plate is arranged at lower side of the valve body and provided with a support member supporting the lower surface side of the inner circumferential lip element and with a fluid flowing hole at the center. The second support plate is biased upward by a second spring means. The first support plate is provided with a fluid flowing hole penetrating vertically between the support member and the seal member on which the inner circumferential lip element of the valve body abuts. |
