| 摘要 |
PROBLEM TO BE SOLVED: To provide a picking prevention cover capable of being easily mounted to a door by anybody without work and any tool, executing one hand operation of opening and closing of a key and being also used for two locks for one door. SOLUTION: The picking prevention cover is constituted of a hole (2) and a U-shaped groove (3) provided to a guard (1), a spring U-shaped groove (5) and a plurality of outward hooks (6) provided to a spring (4), the key (9) having a cover (8) provided in a case (7), an opening section (10) and a plurality of grooves (11) provided to the inside.
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