Plastic foldable storage device

Abstract

The plastic foldable storage device is made from hollow and comb-shaped plastic plates, and includes a rectangular base plate, two first side plates extended respectively from two shorter edges of the base plate, and two second side plates extended respectively from two longer edges of the base plate. The first and second side plates are edge-to-edge joined by joining strips. Each first side plate has two folding lines along its inner surface. The first and second side plates, through the joining strips and the folding lines, are selectively folded into a level positon resting on the base plate or unfolded into an upright position to form a storage space with the base plate. The plastic foldable storage device therefore provides convenient use and storage, while offering additional advantages such as repeated usage, moisture proof, and robustness.

I claim: 
     
         1 . A plastic foldable storage device, comprising:
 a rectangular base plate;   two first side plates extended respectively from two shorter edges of the base plate; and   two second side plates extended respectively from two longer edges of the base plate;   wherein the first and second side plates are edge-to-edge joined together by joining strips;   each first side plate has two folding lines along its inner surface; and   the first and second side plates, through the joining strips and the folding lines, are selectively folded into a level positon resting on the base plate or unfolded into an upright position to form a storage space with the base plate.   
     
     
         2 . The plastic foldable storage device according to  claim 1 , wherein each second side plate has two notches respectively at two upper corners of the second side plate. 
     
     
         3 . The plastic foldable storage device according to  claim 1 , wherein each folding line extends obliquely from a lower corner to an upper edge of the first side plate. 
     
     
         4 . The plastic foldable storage device according to  claim 1 , wherein the joining strips are formed from two thin connection pieces respectively extended from lateral sides of each first side plate.