Selferecting Structure

Abstract

A selferecting structure includes a frame formed by one or two flexible continuous contours of rod or tube material possessing round cross section, each contour having two figure eight loops longitudinally formed as a double figure eight type continuous contour, and sheet material extending over the frame and attached to the rod or tube material. Two flexible continuous contours will be connected together side by side, parallel to each other through four binding tube sleeves to form one foldable structure. Three fixing tube sleeves respectively placed at a crossing of rod or tube of each flexible continuous contour, where the length and the inner size of the fixing tube sleeve define the level of friction of the frame rod or tube material inside the sleeve when unfolding the structure, thus defining a safety rate of the selferecting speed.

1 . A selferecting structure comprising:
 a frame formed by one flexible continuous contour of rod or tube material possessing round cross section, the contour including two figure eight loops longitudinally formed as a double figure eight type continuous contour;   three fixing tube sleeves respectively placed at a crossing of two adjacent round rods or tubes of the flexible continuous contour, which pass through the fixing tube sleeve crosswise; and   a sheet extending over and attached to the frame;   thereby a rate of automatic unfolding speed of the selferecting structure is defined as the length and the inner size of the fixing tube sleeve define the level of friction of the frame rod material inside the fixing tube sleeve when unfolding the structure.   
   
   
       2 . A selferecting structure comprising:
 a frame formed by two flexible continuous contours of rod or tube material possessing round cross section, each contour including two figure eight loops longitudinally formed as a double figure eight type continuous contour;   three fixing tube sleeves respectively placed at a crossing of two adjacent round rods or tubes of each flexible continuous contour, which pass through the fixing tube sleeve crosswise;   four binding tube sleeves respectively connecting two adjacent loops of the two continuous contours so that the two flexible continuous contours are connected together side by side, parallel to each other to form one foldable structure; and   a sheet extending over and attached to the frame;   thereby a rate of automatic unfolding speed of the selferecting structure is defined as the length and the inner size of the fixing tube sleeve define the level of friction of the frame rod material inside the fixing tube sleeve when unfolding the structure.