Foldable Bag

Abstract

A foldable bag, made of a flexible sheet or board like material having a plurality of fold lines, includes a bottom wall, two side walls respectively connected to two opposite sides of the bottom wall, and two connecting walls respectively connected with the side walls and the bottom wall to define a containing space therein. The side wall has a first fold line parallel to the bottom wall and is capable of being folded towards the center of the foldable bag. The connecting wall has two second fold lines respectively extended along the diagonal lines and intersected with each other, and a third fold line parallel to the bottom wall and extended through the intersection point of the two second lines, wherein the ends of the third fold line are connected to the respective ends of the first fold lines, wherein the second fold lines and the third fold lines are capable of being folded toward the center of the foldable bag.

1 . A foldable bag made of a flexible material, comprising:
 a bottom wall;   two side walls connected to two opposite sides of said bottom wall respectively; and   two connecting walls respectively connected with said two side walls and said bottom wall to define a containing space therein;   wherein each of said side walls has a first fold line which is parallel to said bottom wall and capable of being folded towards a center of said foldable bag;   wherein each of said connecting walls has two second fold lines and a third fold line, said two second fold lines extending and intersecting along two diagonal lines of said respective connecting wall and said third fold line extending through an intersection point of said two second lines and in parallel to said bottom wall while two ends of said third fold line are respectively connected to respective ends of said two first fold lines and said second fold lines and said third fold lines are capable of being folded toward a center said foldable bag.   
     
     
         2 . The foldable bag, as recited in  claim 1 , wherein said two second fold lines are perpendicularly intersected and in 45° with said two third fold lines respectively. 
     
     
         3 . The foldable bag, as recited in  claim 1 , wherein each of said side walls of further comprises at least a fourth fold line extended perpendicularly to said bottom wall. 
     
     
         4 . The foldable bag, as recited in  claim 3 , wherein said bottom wall further comprises at least a fifth fold line which is extended perpendicularly to said two side walls, wherein two ends of said fifth fold line are connected to respective ends of said fourth fold lines respectively. 
     
     
         5 . The foldable bag, as recited in  claim 1 , wherein each of said side walls further has a sixth fold line parallel to said bottom wall and is capable of being folded towards an exterior of said foldable bag, wherein two ends of said sixth fold line are connected with respective ends of said second fold lines respectively, wherein a distance between an upper edge of said side wall and said sixth fold line is equal to or shorter than a width of said respective connecting wall between said two side walls. 
     
     
         6 . The foldable bag, as recited in  claim 4 , wherein each of said side walls further has a sixth fold line parallel to said bottom wall and is capable of being folded towards an exterior of said foldable bag, wherein two ends of said sixth fold line are connected with respective ends of said second fold lines respectively, wherein a distance between an upper edge of said side wall and said sixth fold line is equal to or shorter than a width of said respective connecting wall between said two side walls. 
     
     
         7 . The foldable bag, as recited in  claim 1 , further comprising an outer case for receiving said foldable bag after folded therein, wherein said outer case is attached to said bottom wall and has at least a seventh fold line. 
     
     
         8 . The foldable bag, as recited in  claim 7 , wherein said outer case comprises at least a set of elements selected from a group consisting of buttoning element, hooking element, locking element, adhering element, bonding element and binding up element, thereby free ends of said outer case are able to be fastened up to prevent said foldable bag after being folded up and contained therein from unfolding. 
     
     
         9 . The foldable bag, as recited in  claim 1 , wherein each of said two side walls has a through hole provided adjacent to and along an upper edge thereof for functioning as a handle. 
     
     
         10 . The foldable bag, as recited in  claim 9 , wherein portions between said upper edges of said two side walls and said through holes are folded up, wherein said folded-up portions are buttoned up, hooked up, locked up, bonded up or bound up to strengthen a supporting ability of an area around said through holes. 
     
     
         11 . The foldable bag, as recited in  claim 1 , wherein said foldable bag is made of flexible sheet or board like material selected from the group consisting of paper board, composite paper, metal, alloy and plastic. 
     
     
         12 . The foldable bag, as recited in  claim 6 , wherein said foldable bag is made of flexible sheet or board like material selected from the group consisting of paper board, composite paper, metal, alloy and plastic. 
     
     
         13 . A foldable bag, comprising:
 a bag body capable of being unfolded and folded;   an outer case comprises a first surface, a surface connecter and a second surface, wherein one side of said first surface and one side of said second surface are respectively connected to two sides of said surface connecter, wherein said outer case further comprises a first locking element provided on said first surface; and   an outer case locker comprising a locking surface and a second locking element provided on said locking surface, wherein one side of said locking surface is connected with one side of said second surface;   wherein a bottom of said bag body is attached to sad outer case, wherein said bag body is capable of being folded and contained in said outer case, which is fastened by locking said first locking element to said second locking element.   
     
     
         14 . The foldable bag, as recited in  claim 13 , wherein said first locking element and said second locking element are element selected from a group consisting button and Velcro. 
     
     
         15 . The foldable bag, as recited in  claim 13 , wherein said first locking element is a button and said second locking element is an elastic belt with two ends connected to said second surface, wherein said bag body is capable of being folded and contained in said outer case, which is fastened by hooking said button on said first surface with said elastic belt on said second surface. 
     
     
         16 . The foldable bag, as recited in  claim 13 , wherein said first and second locking elements are constructed by a slide fastener with two sides respectively connected with the edges of said first surface and said second surface, wherein said bag body is capable of being folded and contained in said outer case by fastening said slide fastener on the edge of said outer case. 
     
     
         17 . The foldable bag, as recited in  claim 13 , further comprising a bag body fastener crossing said bottom of said bag body, wherein said bag body fastener connects said bag body to said outer case. 
     
     
         18 . The foldable bag, as recited in  claim 13 , further comprising one or more card receivers provided on said bag body. 
     
     
         19 . The foldable bag, as recited in  claim 13 , wherein said bag body further comprises a handle hole provided on each side of the top thereof. 
     
     
         20 . The foldable bag, as recited in  claim 13 , wherein said bag body further comprises a handle provided on each side of the top thereof.