CYLINDER LOCK

PROBLEM TO BE SOLVED: To provide a cylinder lock of excellent antitheft property illegally unlockable by punching. SOLUTION: The cylinder lock 1 comprising a cylinder 3 in a holder 2 is provided with a locking/unlocking mechanism for locking by inhibiting cylinder rotation unless a key 50 is inserted in the cylinder 3 and unlocking by permitting cylinder rotation when the key 50 is inserted in the cylinder, and an output member 4 provided on the rear end side of the cylinder 3 to output the rotation of the cylinder 3 to the outside. The cylinder 3 is separated into a body part 20, and a rear end 30 provided with the output member 4. The body part 20 and the rear end part 30 are connected by the key 50 inserted in the cylinder 3, and the rear end 30 is separated from the body part 20 when the rear end 30 slips out of the holder 2 following the movement of the cylinder 3 within the holder 2. COPYRIGHT: (C)2007,JPO&INPIT