Micro-pressure difference self-sealing box opening of airtight box

Abstract

The invention provides a micro-pressure difference self-sealing box opening of an airtight box, the problem to be solved is that sealing measurements of the prior airtight box has little effect on the airtight box with a longer box opening. The larger the length of the box opening and a sealing strip, the more difficult to realize the purpose of uniform and coincident pressure at each position ofthe box opening after the box opening presses the sealing strip. The invention has the essential that the micro-pressure difference self-sealing box opening of the airtight box comprises the box opening and the sealing strip, wherein the sealing strip is formed by combining a support member of the box opening, the sealing strip with an upper extension edge and a lower extension edge and a supportstrip of the extension edge according to the sequence from the outside to the inside, and the support strips of the extension edge is placed between two extension edges of the sealing strip. The invention is applied to the box opening of the airtight box.

Description

technical field [0001] The invention relates to a self-sealing tank mouth of an airtight box. Background technique [0002] The airtight box requires its mouth to be sealed. When the mouth of the airtight box is closed, generally speaking, the air pressure inside the box will be greater than that outside the box. The sealing measure of the airtight box is usually to inlay the elastic sealing strip on the opening of the box. When the opening of the box is closed, the opening of the box puts pressure on the elastic sealing strip to make it deform and fit closely with the opening of the box. This sealing measure is effective for smaller airtight boxes, that is, the airtight box with a shorter opening, but the above sealing measures are basically ineffective for airtight boxes with longer openings. This is because the longer the length of the tank opening and the sealing strip, the more difficult it is to achieve a uniform pressure at every part of the tank opening after the ta...

AI Technical Summary

Problems solved by technology

This is because the longer the length of the tank opening and the sealing strip, the more difficult it is to achieve a uniform pressure at every part of the tank opening after the tank opening exerts pressure on the sealing strip. The sealing strip is permanently deformed and loses its sealing effect; if the pressure is too small, there will be air leakage

Secondly, when several airtight boxes are piled up and placed, the weight borne by the upper cover of the airtight box placed below will be applied to the sealing strip of the box opening, causing its permanent deformation to lose its sealing effect

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