SIMPLE KEY COVER FOR CRIME PREVENTION COUNTERMEASURE

摘要

PROBLEM TO BE SOLVED: To solve a problem that a hole is drilled in a door with a drill, a bendable bar is inserted into the hole to rotate a key inside with the bar directly, and the key is opened.;SOLUTION: The cover is put on the key having a shape in which the bar is hooked easily, is changed into a shape of the key in which the bar is difficult to be hooked.;COPYRIGHT: (C)2004,JPO