| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder lock unit which makes difficult unauthorized unlocking without using a locking/unlocking key or duplication of the same. SOLUTION: According to the cylinder lock unit, an auxiliary pin guide hole penetrating through an outer cylinder 11 and an inner cylinder 12 and reaching a keyhole is formed in each cylinder lock such that a location thereof along a key inserting direction is varied from one cylinder lock to another, and an auxiliary pin 25 which is divided into an inner pin 23 and an outer pin 24 at a longitudinal predetermined location of the auxiliary pin guide hole as a boundary, is slidably inserted into the hole. The outer cylinder 11 is provided with a first elastic member 26 for energizing the outer pin 24 of the auxiliary pin 25 to the key hole. The locking/unlocking key 3 has a projection 6b and a second elastic member. The projection 6b allows a dividing surface between the inner pin 23 and the outer pin 24 to coincide with a rotational boundary surface between the inner cylinder 12 and the outer cylinder 11 when the key 3 is inserted into an unlockable location of the cylinder lock 10 and abuts on an inner edge of the inner pin 23. The second elastic member energizes the inner pin 23 outward upon abutment thereof on the projection 6b. COPYRIGHT: (C)2004,JPO
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