Expanding-folding apparatus for storage bag

Abstract

An expanding-folding apparatus for storage bag includes a frame structure and a bag that the frame structure further includes a first and a second frames in H shape and two respective free ends of both the first and second frames are movably connected so as to fold them toward each other into an overlapping state. The bag, made of flexible material, has an opening at upper end with a circumference of the opening connected to a bottom of the first and second frames. Thereby expanding the frame structure can expand the bag into a storage space and folding the frame structure can close the bag at the same time. The storage bag can be used as a back-bag.

I claim: 
     
         1 . An expanding-folding apparatus for storage bag comprising:
 a frame structure including a first frame and a second frame both in Π shape, two free ends of the first frame being movably connected to two correspondent free ends of the second frame so as to fold both the first frame and second frame toward each other into a overlapping state;   a bag having an opening positioned at upper end with a circumference of the opening connected to a bottom of the first and second frames.   
     
     
         2 . The expanding-folding apparatus for storage bag of  claim 1 , wherein the first and second frames are manufactured with hallow tube of rectangle cross-section by bending and the two free ends of the first frame are pivotally connected with each end of two linkages whose two other ends are pivotally connected with the two correspondent free ends of the second frame. 
     
     
         3 . The expanding-folding apparatus for storage bag of  claim 1 , wherein the first and second frames are manufactured with hallow tube of circular cross-section by bending and two hinges are respectively provided between the two free ends of the first frame and the two correspondent free ends of the second frame. 
     
     
         4 . The expanding-folding apparatus for storage bag of  claim 1 , wherein the first and second frames are manufactured with solid tube and the two free ends of the first frame are pivotally connected to the two correspondent free ends of the second frame. 
     
     
         5 . The expanding-folding apparatus for storage bag of  claim 1 , wherein a carrying belt is provided to the diagonal location at each of the first and second frames. 
     
     
         6 . The expanding-folding apparatus for storage bag of  claim 2 , wherein a carrying belt is provided to the diagonal location at each of the first and second frames. 
     
     
         7 . The expanding-folding apparatus for storage bag of  claim 3 , wherein a carrying belt is provided to the diagonal location at each of the first and second frames. 
     
     
         8 . The expanding-folding apparatus for storage bag of  claim 4 , wherein a carrying belt is provided to the diagonal location at each of the first and second frames.