| 摘要 |
PROBLEM TO BE SOLVED: To provide sufficient destruction preventive effect and reduce the manufacturing cost of a match key. SOLUTION: This cylinder lock 1 comprises a rotor case 2 having an internal space 2A and a rotor 3 contained in the internal space 2A of the rotor case 2. The rotor 3 comprises a first rotor element 3A having a key insertion/extraction hole 3C one end of which is open to its key insertion side end surface and a tumbler arrangement hole 3G communicating with the key insertion/extraction hole 3C and forming the key insertion side part (a) of the key insertion/extraction hole 3C and a second rotor element 3B forming the portion of the key insertion/extraction hole 3C including a key anti-insertion side part. The first rotor element 3A is formed of a metal material to which a hardening treatment is applied. COPYRIGHT: (C)2008,JPO&INPIT
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