Collapsible storage device

Abstract

The storage device contains two U-shaped lower frame elements, two inverse U-shaped upper frame elements, a casing member, and some resilient element. The lower frame elements are hinged such that they can be closed towards or expanded away from each other. The two upper frame elements have their fork legs jointed to the fork arms of the lower frame elements, respectively. The engagement of the fork legs and arms is buffered by the resilient elements which are provided inside the fork legs, respectively.

1 . A collapsible storage device comprising:
 a plurality of resilient elements;   two inverse U-shaped upper frame elements wherein each of the fork legs has a second sleeve at the end that houses a resilient element inside;   two U-shaped lower frame elements wherein the fork arms of one lower frame element are hinged to the fork arms of the other lower frame element, respectively, such that said lower frame elements are capable of being closed towards or expanded away from each other, and said upper frame elements are joined to the said lower frame elements, respectively, by having the fork arms sleeved inside said second sleeves of said upper frame elements, respectively;   a box-shaped casing member housing and braced by said assembled upper and lower frame elements;   
   
   
       2 . The collapsible storage device according to  claim 1 , wherein each of said upper frame element contains two parts, each containing a portion of the top beam of said upper frame element and one of the fork legs; and the two parts are joined together by a first sleeve which is fixedly configured on one of said parts. 
   
   
       3 . The collapsible storage device according to  claim 1 , wherein said casing member is made of cloth or other soft material.