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Pub. No.:    WO/2017/157234    International Application No.:    PCT/CN2017/076145
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Fri Mar 10 00:59:59 CET 2017
IPC: A44B 19/34
Applicants: ZHENG, Yunting
Inventors: ZHENG, Yunting
A double-tape, double-layered insertion-proof zipper, comprising a zipper base (1), an upper chain (2), a lower chain (3), an upper steel tape measure (4), and a lower steel tape measure (5). The upper chain (2) comprises a left upper chain (12), a right upper chain (13), a zipper head closing element (14), and a zipper tail closing element (15). The left upper chain (12) is provided with left upper teeth (18), a left upper tape (19), left insertion-proof plates (20), and left upper hooks (21). The lower chain (3) comprises a left lower chain (16) and a right lower chain (17). The right upper chain (13) is provided with right upper teeth (22), a right upper tape (23), right insertion-proof plates (24), and right upper hooks (25). The left lower chain (16) is provided with left lower teeth (26), a left lower tape (27), the left lower teeth (26), and left lower hooks (28). The right lower chain (17) is provided with right lower teeth (29), a right lower tape (30), and right lower hooks (31). The upper steel tape measure (4) is provided with an upper steel tape strip (32). The lower steel tape measure (5) is provided with a lower steel tape strip (34). When in use, the double-tape, double-layered insertion-proof zipper is arranged on a piece of luggage, the left insertion-proof plates (20) and the right insertion-proof plates (24) are utilized to close the corresponding gaps between the left teeth and the right teeth, and the upper steel tape strip (32) and the lower steel tape strip (34) are utilized to close the upper chain (2) and the lower chain (3), thus increasing the difficulty for a criminal to open the zipper by inserting a sharp tool.