Expandable document bag

Abstract

An expandable document bag comprises a boxing casing; the box casing having a lower plate; a left lateral plate and a right lateral plate; an interior of the box casing being formed with a receiving space; each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots. The lower plate is elastic and thus is expandable so as to adjust a size of the receiving space. The box casing is installed with at least one receiving bag for receiving documents or other objects.

1 . An expandable document bag comprising a boxing casing; the box casing having a lower plate; a left lateral plate and a right lateral plate; an interior of the boxing casing being formed with a receiving space; 
 each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and    the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots;    wherein the lower plate is elastic and thus is expandable so as to adjust a size of the receiving space.    
   
   
       2 . The expandable document bag as claimed in  claim 1 , wherein the box casing is installed with at least one receiving bag for receiving documents or other objects.  
   
   
       3 . An expandable document bag comprising a box casing; the box casing being formed by a bottom plate, an upper cover, a left lateral plate, a right lateral plate and a lower plate; the upper cover, left lateral plate and right lateral plate being connected by a slightly compressible bending portion and the bottom plate; 
 a plurality of receiving bags being formed on the bottom plate at an inner side of the box casing; the receiving bags serving for receiving smaller documents and related materials; by opening and closing the box casing by using upper cover, objects in the receiving bags can be taken out;    each of the left lateral plate and right lateral plate having an inserting post; the lower plate being elastic; and    the lower plate having two sliding slots at positions corresponding to the two inserting posts, each sliding slot being capable of receiving a respective inserting post; the inserting posts being slidable within the sliding slots;    wherein the lower plate is elastic and thus is expandable so as to adjust a size of the receiving space.