Sealed container with inner lid

Abstract

A sealed container with an inner lid 1a includes an openable and closable outer lid 3 to cover an opening 24 of a container body 2; and an inner lid 5a including a frame 53 having a flange 52 on its upper end and a circumferential outer side-surface 55, and an easily elastically deformable partition 51 having a dome shape projecting downward inside the frame 53. The outer lid includes a central area 12 having a dome-shaped concave portion inside a top face portion 10, and a peripheral area 13 surrounding the concave portion. The central area faces the partition and the peripheral area contacts the flange portion in a closed state. The central area has an inner surface formed such that, when the partition deforms to project upward, a surface area of the deformed partition is equal to or smaller than an initial surface area thereof.

1 . A sealed container with an inner lid, comprising:
 a bottomed container body having an opening on its upper side, an outer lid to cover the opening in an openable and closable manner and an inner lid to hermitically seal the container body,   the inner lid including a frame having a flange portion on its upper end and a circumferential outer side-surface, and a partition formed at and inside the frame, the partition being easily elastically deformable, the circumferential outer side-surface of the frame being pressed against inner surface of the container body on its opening end side in a state in which the inner lid is mounted to the container body,   the partition being formed in a dome shape projecting downward in an initial state in which the inner lid is not mounted to the container body, the partition being deformable to a dome shape projecting upward,   the outer lid including a central area having a dome-shaped concave portion inside a top face and a peripheral area surrounding the concave portion,   the central area facing the partition and the peripheral area being in contact with an upper surface of the flange portion in a closed state in which the inner lid is mounted to the container body and the outer lid covers the opening of the container body,   the central area having an inner surface formed so that, when the partition deforms to project upward, a surface area of the partition in the deformed state is equal to or smaller than a surface area of the partition in the initial state.   
     
     
         2 . A sealed container with an inner lid according to  claim 1 , wherein
 a difference in height between an upper end of the central area and a vertical position of the periphery of the partition in the closed state is equal to or smaller than a difference in height between a lower end of the partition and the vertical position of the periphery thereof, and   the surface area of the central area facing the partition is equal to or smaller than a surface area of an upper surface of the partition in the initial state.   
     
     
         3 . A sealed container with an inner lid according to  claim 1 , wherein
 the inner lid has a shape in which the periphery of the partition is connected to an inner circumferential upper end of the flange portion.   
     
     
         4 . A sealed container with an inner lid according to  claim 1 , further comprising:
 a vent allowing communication between the inside of the central area of the outer lid and outside air.   
     
     
         5 . A sealed container with an inner lid according to  claim 4 , wherein
 the vent is a groove formed to extend radially outward in at least one of the peripheral area of the outer lid and the upper surface of the flange portion of the inner lid.   
     
     
         6 . A sealed container with an inner lid according to  claim 1 , wherein
 the outer lid includes, inside thereof, a mounting mechanism to engage with the upper side surface of the container body, and   the outer lid is to be mounted to the container body using the mounting mechanism, when the outer lid is pushed downward from above to the container body so that the opening is closed with the top face portion.