Patent ID: 7472570

Claim:
A key cylinder comprising: a rotor, rotating by a key being inserted therein at one end and rotationally operated; an accommodating member, accommodating the rotor; a latching member, provided at the rotor, stopping movement of the rotor within the accommodating member in at least one of a direction of insertion of the key, or a direction of extraction of the key; an engaging member disposed at an opposite end of said rotor and having a portion for receiving said latching member such that when an authentic key is inserted into the rotor and the rotor has been rotated, said portion engages with the latching member and said engaging member is operated by rotation of the rotor, and at least one slide bar for moving said engaging member in a key-insertion direction when an authentic key is not inserted into the rotor and the rotor has been rotated such that said portion disengages from the latching member and said engaging member is not operated by the rotation of the rotor.