| 摘要 |
A cylinder lock with associated key, comprising a body (1), a cylindrical seat (4) formed in the body, a plug (5) that can rotate in the seat, an actuation cam that is rotationally rigidly coupled to the plug, a keyway (6) for the key (7) that is formed axially in the plug, a plurality of actuation tumblers which, when the key is extracted, prevent the rotation of the plug and, when the key is inserted in the keyway, are actuated into the position that allows the rotation of the plug, at least one auxiliary tumbler (23, 29), which is accommodated in a seat (11, 18) of the plug (5) that is connected to the keyway (6) and is actuated by a spring (22) so as to prevent the rotation of the plug when the key is extracted; the auxiliary tumbler (23, 29), when the key is extracted, does not protrude into the keyway and the key (7) has at least one transverse hollow (34) that accommodates a movable element (36) that is pushed by a spring (35) into a position that protrudes from one side of the key so as to assume, when the key is inserted, a position that is opposite to a respective auxiliary tumbler (23, 29), the spring (35), which acts on the movable element in the opposite position, being suitable to push the auxiliary tumbler (23, 29) into the position that allows the rotation of the plug (5). <IMAGE>
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