Containing Box Structure

Abstract

A containing box structure includes containing boxes provided for containing objects, a protrusion formed at a predetermined section around the periphery of an opening formed at the top of each containing box, a hollow receiving section extended downwardly from the periphery of the opening of each containing box and engaged with the respective protrusion of the adjacent containing box, so that when the containing boxes are stacked with each other, the positions of the containing boxes are limited, and a multiple of containing boxes can be stacked on one another while preventing the opening at the top of the containing box from being compressed, expanded outwardly and deformed.

What is claimed is: 
     
         1 . A containing box structure, comprising a plurality of containing boxes provided for containing objects and stacked on one another, and preventing an opening formed at the top of each containing box from being compressed and deformed by gravitational force by providing a plurality of protrusions formed at a plurality of predetermined sections around the periphery of the opening at the top of the containing box, and a segment of a hollow receiving section of the containing box configured to be corresponsive to the respective protrusion of and extended downwardly from the periphery of the opening; such that when the containing boxes are stacked, each receiving section at a facing-down position near an upper containing box may enter into a respective protrusion near a lower containing box, such that the upper and lower containing boxes have an exact position limit to prevent the top of an opening of the lower containing box from being compressed, outwardly expanded, and deformed while the upper containing box is being stacked onto the lower containing box. 
     
     
         2 . The containing box structure of  claim 1 , wherein each protrusion formed at the periphery of the opening at the top of the containing box has a height slightly greater than ½ of an outer layer position or precisely aligned with the outer layer position. 
     
     
         3 . The containing box structure of  claim 1 , wherein each hollow receiving section extended downwardly from the periphery of the opening of the containing box has a depth greater than the depth of the protrusion at the top of the opening to maintain a stable engagement between the upper and lower containing boxes when the upper containing box is stacked onto the lower containing box, and an appropriate interval is maintained between the upper and lower containing boxes, so that the containing boxes can be taken out by a light force when needed.