Collapsible Storage Device

Abstract

The collapsible storage device contains a foldable and expandable support member inside the storage device. The support member contains a first moving plate, a second moving plate, a third moving plate, and a fourth moving plate, cascaded in series. A front moving plate and a back moving plate support a front side and a back side of the storage device, respectively. The front moving plate can also function as a door to the storage device. The moving plates in the middle are laid on a bottom side of the storage device as bottom plates. This support member allows a user to quickly and conveniently expand and collapse the storage device.

I claim: 
     
         1 . A collapsible storage device, comprising:
 a casing member, the casing member comprising a top plate, a soft bottom piece opposing the top plate, a first side plate, a second side plate opposing the first side plate, and a soft back piece, where the first and second side plates are configured between corresponding edges of the top plate and the bottom piece, and the soft back piece borders the top plate, the bottom piece, the first and second side plates, the top plate is configured with an interface element along the edges of the top plate, and the top edges of the back piece and the first and second side plates are rotatably joined to the interface element; and   a support member, the support member comprising a first moving plate, a second moving plate, a third moving plate, and a fourth moving plate, rotatably cascaded in series in the above order, where a back edge of the first moving plate is rotatably joined to a back section of the interface element, along with the top edge of the back piece, when the casing member is expanded, the first moving plate is turned to be against the back piece so as to provide support along a vertical direction, the second and third moving plates are turned to lay flatly on the bottom piece, the fourth moving plate is used to cover or open a front opening of the casing member, the first moving plate has an area greater than or equal to that of the back piece inside the casing member, the total area of the second and third moving plates is greater than or equal to that of the bottom piece inside the casing member.   
     
     
         2 . The collapsible storage device according to  claim 1 , wherein the interface element has an H-shaped cross-section, thereby providing a top trough and a bottom trough; each edge of the top plate is bended downward and embedded in the top trough; and the top edges of the back piece and the first and second side plates are embedded in the bottom trough. 
     
     
         3 . The collapsible storage device according to  claim 1 , wherein a first fastening element is configured at an appropriate location on a bottom side of the third moving plate; and a second fastening element matching the first fastening element is configured correspondingly on a top side of the bottom piece. 
     
     
         4 . The collapsible storage device according to  claim 1 , wherein a first magnet is configured at an appropriate location on a back side of the fourth moving plate; a second magnet is configured in a downward extended patch from a front section of the interface element; and the first and second magnets are of reverse polarities. 
     
     
         5 . The collapsible storage device according to  claim 1 , wherein a handle is configured on an outer side of the fourth moving plate. 
     
     
         6 . The collapsible storage device according to  claim 1  further comprising a drawer member received by the casing member. 
     
     
         7 . The collapsible storage device according to  claim 6 , wherein the drawer member comprises a plurality of plates assembled together.