Plastic packaging box with high sealing performance

Abstract

The invention provides a plastic packaging box with a high sealing performance. The plastic packaging box comprises a first inclining extension part and a second inclining extension part, wherein thefirst inclining extension part and the second inclining extension part completely enter a clamping groove; the lower end of the second inclining extension part can be elastically opened and is in contact with a third vertical extension part, when upper end of the first inclining extension part and the upper end of the second inclining extension part abut against a arc-shaped lower surface of a second horizontal extension part, the first inclining extension part and the second inclining extension part continue to enter the clamping groove along with the first vertical extension part; the firstvertical extension part supports upwards the first inclining extension part; the first inclining extension part can support the second inclining extension part; the arc-shaped lower surface of the second horizontal extension part can have downward reverse supporting force to the first inclining extension part and the second inclining extension part; the upper end of the first inclining extensionpart drives the upper end of the second inclining extension part to slide towards the third vertical extension part along the arc-shaped lower surface of the second horizontal extension part; the lower end of the second inclining extension part gradually slides into a containing groove along the inner side surface of the third vertical extension part and is clamped at a clamping block, so that double sealing can be automatically realized.

Description

technical field [0001] The invention relates to the field of daily life, in particular to a plastic packaging box with strong airtightness. Background technique [0002] The structure of the plastic packaging box is known. For example, the Chinese utility model patent CN201320651003.2 discloses a disposable plastic lunch box, which includes a box body and a box cover compatible with the box body. The grid that divides the box body into a plurality of spaces, the outer peripheral edge of the box body is provided with a buckle cover edge connected with the box cover, the grid in the box body is higher than the buckle cover edge, and the middle part of the box cover forms an upward The outer peripheral edge of the box cover is provided with a cover groove that matches the cover edge of the box body, and a plurality of locking teeth are evenly arranged on the inner wall of the cover groove, and the box body and the cover are closed. , the top surface of the grille in the box bo...

AI Technical Summary

Problems solved by technology

[0003] The structure of the aforementioned utility model is roughly similar to that of other plastic packaging boxes on the market. In the actual use process, there are cases where the lid and the box body are not tightly buckled and sealed, and internal gas and liquid leakage are prone to occur. Users bring a lot of trouble, practicality needs to be improved

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