| 摘要 |
PROBLEM TO BE SOLVED: To prevent an action for the purpose of a crime by use of a spare key-free electronic lock formed by the combination of a converter and a computer. SOLUTION: When a door or handle is touched, pushed, or beaten without a normal ten-key input, an alarm is emitted as a first alarm. When a ten-key is to be broken, a second alarm sound is emitted, a report is transmitted to a security related organization, and a red liquid showered on the head of an intruder through a small injection hole provided in the upper part of a door frame. When the door is further broken despite of the first and second signals to intrude into the door frame, a momentary high frequency is radiated from an electrode conductor arranged in the door frame together with a third signal to give an electric shock to the intruder. The electronic lock can be unlocked by pulling an emergency pull on the interior side even if the power supply is cut. COPYRIGHT: (C)2003,JPO
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