| 摘要 |
PROBLEM TO BE SOLVED: To provide a picking preventive device for a cylinder lock for protecting a cylinder lock set on a door independently from a door knob from an illicit unlocking action by picking. SOLUTION: A base plate 6 is inserted to a clearance formed between the door D and the collar ring 42 of the cylinder lock 4 is inserted and fixed, and a cover body 6 having a space capable of housing a base plate 5 and the cylinder lock 4 in the inner part is integrally provided to the base plate 5.
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