Overlap of one pair of semicircles for the folding combining structure

An overlap of one pair of semicircles for the folding combining structure, can rotate the rotating seat structure body of the angle to install several by the proper distance between the left frame of the window frame and right frame mainly, rotating seat structure body to left deviation and right deviation connected with several yarn frame structure groups, and can enable rotate yarn frame structure group to open state and close state, install rotating seat structure body in the symmetrical position of two phase of yarn frame structure group, its characteristic lies in:

• rotating seat structure body consists of two round-lacks connected posts, an even rounds-lack overlap post, and a arc-round bottom seat, among them,
• Round-lack connected post:
• Adopt integrative shaping, present above tying“” type or “L” type connected with the end of the terminal surface plate in the symmetrical, “” type or “L” type terminal surface plate in the central place extension connected-terminal surface, continue a round-lacks connected head, and there is a breach;
• Even rounds-lack overlaps post:
• It is a breach of two round-lack terminal surface to connect the connection point reversely;
• and
• Arc-round bottom seat:
• It is the integrative shaping, there are both ends that is arc terminal surfaces, the central place consists of two holes in a utensil.