Lunch box

Abstract

The invention discloses a lunch box, which comprises a box body and a box cover, wherein the box cover is buckled above the box body, a storage cavity is formed between the box body and the box cover,the top portion of the box cover is cut to form at least a movable sheet, a concave pit is formed between the outer edge of the movable sheet and the box cover, the box cover is provided with a flange around the movable sheet, one end of the movable sheet is tightly connected to the box cover, the tight connection position forms a folding shaft, and the movable sheet can be folded up and down byusing the folding shaft as the shaft. Compared to the lunch box in the prior art, the lunch box of the present invention has the following characteristics that the top portion of the box cover is provided with the movable sheet, and the external force can be applied on the movable sheet when the gas is required to be discharged so as to damage the original structure, such that the gas permeation hole is formed between the movable sheet and the box cover and is used for communicating the interior of the lunch box and the outside gas, and the reflux cannot be formed when the food is heated.

Description

technical field [0001] The invention relates to a tableware, in particular to a lunch box. Background technique [0002] At present, plastic lunch boxes are widely used due to their superior properties such as good sealing, easy cleaning, light weight, and beautiful appearance, gradually replacing other lunch boxes. In the prior art, after the lid of the lunch box is fastened to the box body, the inside of the lunch box is sealed, which not only has a good heat preservation effect, but also effectively prevents the food in the lunch box from leaking out. Because the sealing performance directly affects the use of the lunch box, Most of the lunch boxes in the prior art have good airtightness without other ventilating passages. And good sealing performance will also bring certain disadvantages. For example, when the lunch box is used in a low temperature environment, the air inside the lunch box will shrink and it will be difficult to open under the action of atmospheric pres...

AI Technical Summary

Problems solved by technology

In the prior art, after the lid of the lunch box is fastened to the box body, the inside of the lunch box is sealed, which not only has a good heat preservation effect, but also effectively prevents the food in the lunch box from leaking out. Because the sealing performance directly affects the use of the lunch box, Most of the lunch boxes in the prior art have good airtightness without other ventilation channels

And good sealing performance will also bring certain disadvantages. For example, when the lunch box is used in a low temperature environment, the air inside the lunch box will shrink and it will be difficult to open under the action of atmospheric pressure, and the air inside the lunch box will expand when heated, which will increase the pressure inside the lunch box. , it is easy to cause deformation of the box cover or even bulging of the box cover to cause splashing of the internal food, etc., and the water vapor of the food in the lunch box cannot be discharged during heating, which will form a phenomenon of water vapor backflow, resulting in the food not being able to maintain the original flavor, inconvenient to use and a potential safety hazard

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