Container
Provided is a container with which its body can be deformed with a same external force until most of the contents has been discharged from the container body and to cause the final shape after the deformation to be a constant shape. Also provided is a container with which the contents discharged can be rendered constant, thus making it possible to obtain a diluted product having a constant concentration. The container includes a bottomed container body and a lid member, the container body and the lid member being sealed by an annular seal portion. There is provided a detaching seal portion which is detached in response to increase of pressure inside the container body associated with deformation of the container body. There is also provided a deformation controlling recess whose width is progressively reduced from a back face side of the flange toward the bottom face side.
1. A container including a bottomed container body holding contents therein and a lid member for closing an opening of the container body, the container body and the lid member being sealed with each other by an annular seal portion formed along a flanged face of the opening;
wherein at a specified portion of the annular seal portion, there is provided a detaching seal portion which is detached in response to increase of pressure inside the container body associated with deformation of the container body based on an external force received from a bottom face of the container body; and
at a portion of a side wall portion of the container body, there is provided a deformation controlling recess whose width is progressively reduced from a back face side of the flanged face toward the bottom face side;
the deformation controlling recess including a base end sunk portion extending from the back face of the flange toward the bottom face, and a sloped sunk portion extending continuously from an end of the base end sunk portion and having a width progressively reduced from the base end sunk portion toward the bottom face.
2. The container according to claim 1 , wherein the side wall portion comprises a cylindrical body whose diameter is progressively reduced toward the bottom face.
3. The container according to claim 2 , wherein:
the side wall portion includes a base end portion extending from the back face of the flanged face towards the bottom face, a leading end portion extending from the bottom face towards the back face, and an intermediate portion interconnecting the base end portion and the leading end portion and more deformable by the external force than the leading end portion and the base end portion; and
the deformation controlling recess extends at least from a portion of the intermediate portion to vicinity of boundary between the intermediate portion and the leading end portion.
4. The container according to claim 3 , wherein the base end portion includes the base end sunk portion extending from the back face of the flanged face toward the bottom portion; and the deformation controlling recess extends continuously from a lower end of the base end sunk portion towards the bottom portion.
5. The container according to claim 4 , wherein:
the annular seal portion includes a reverse-oriented annular seal portion projecting toward the radial inner side of the opening; and
the reverse-oriented annular seal portion extends along a region in the flanged face which corresponds to a radial outer side of an upper end of the base end sunk portion.
6. A container including a bottomed container body holding contents therein and a lid member for closing an opening of the container body, the container body and the lid member being sealed with each other by an annular seal portion formed along a flanged face of the opening;
wherein at a specified portion of the annular seal portion, there is provided a detaching seal portion which is detached in response to increase of pressure inside the container body associated with deformation of the container body based on an external force received from a bottom face of the container body; and
at a portion of a side wall portion of the container body, there is provided a deformation controlling recess whose width is progressively reduced from a back face side of the flanged face toward the bottom face side;
wherein the deformation controlling recess comprises a sloped sunk portion which is displaced to one side in the circumferential direction from the back face side of the flanged face towards the bottom face side.