Lunch box

Abstract

The present invention relates to a lunch box, including a base and a lid, wherein the lid is disposed on the base and snap-fitted with it, and by which the base and the lid form a storage cavity there-between, and at least one movable sheet is provided on the lid by cutting, and a pit is defined by the lid and an outer edge of the movable sheet. A flange is provided on the lid surrounding the movable sheet. One end of the movable sheet is closely connected with the lid and a foldable hinge is formed at the junction. The movable sheet can bend up and down with the foldable hinge as its axis. Compared with the prior art, the movable sheet is provided on the top of the lid. When air emission is needed, external force can be exerted to the movable sheet, undermining the original connecting structure to produce a vent hole between the movable sheet and the lid. This vent hole can circulate the inside air and the outside air and prevent from the backflow phenomenon when heating food.

Dependencies are inferred from the claim text.