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1. (WO2017157237) METHOD FOR USING DOUBLE-LAYERED DOWNWARD INSERTION-PROOF ZIPPER

Pub. No.:    WO/2017/157237    International Application No.:    PCT/CN2017/076150
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
A44B 19/24
A44B 19/30
Applicants: ZHENG, Yunting
郑运婷
Inventors: ZHENG, Yunting
郑运婷
Title: METHOD FOR USING DOUBLE-LAYERED DOWNWARD INSERTION-PROOF ZIPPER
Abstract:
A method for using a double-layered downward insertion-proof zipper. The double-layered downward insertion-proof zipper comprises a zipper base (1), an upper chain (2), a lower chain (3), and a steel tape measure (4). The upper chain (2) comprises a left upper chain (9), a right upper chain (10), a zipper head closing element (11), and a zipper tail closing element (12). The lower chain (3) comprises a left lower chain (13) and a right lower chain (14). The steel tape measure (4) comprises a steel tape strip (16). The left upper chain (9) is provided with left upper teeth (18), left upper insertion-proof plates (19), and a left upper tape (20). The right upper chain (10) is provided with right upper teeth (21), right upper insertion-proof plates (22), and a right upper tape (23). The left lower chain (13) is provided with left lower teeth (24), left lower insertion-proof plates (25), and a left lower tape (26). The right lower chain (14) is provided with right lower teeth (27), right lower insertion-proof plates (28), and a right lower tape (29). When in use, the double-layered downward insertion-proof zipper is arranged on a piece of luggage, the left upper insertion-proof plates and the right upper insertion-proof plates are utilized to close the corresponding gaps between the left upper teeth and the right upper teeth, the left lower insertion-proof plates and the right lower insertion-proof plates are utilized to close the corresponding gaps between the left lower teeth and the right lower teeth, and the steel tape strip of the steel tape measure is utilized to close the two chains, thus increasing the difficulty for a criminal to open the zipper by inserting a sharp tool.