Patent ID: 6923335

Claim:
A case comprising: a case body provided with a mouth; a lid having a circumferential wall extending from a region substantially along a peripheral edge of the lid, the lid being configured to be detachably screwed on the mouth for closing an opening thereof; a rotary ring fitted and held around the mouth so as to rotate in a circumferential direction thereof, wherein the lid is pivotally connected to the rotary ring via a hinge and is configured to rotate together with the rotary ring, and a portion of the lid is configured to fit substantially to the rotary ring when the mouth is closed with the lid; and a screw mechanism provided between the mouth and the lid, the screw mechanism being adapted to protect the lid outward with respect to the rotary ring when the lid is unscrewed from the mouth, and to draw back the circumferential wall into the interior of the rotary ring when the lid is screwed on the mouth.