| 摘要 |
A key and cylinder lock unit, in which the lock (2) comprises a plug (6) and a cylinder (8), both provided with a plurality of substantially radial cylindrical recesses (12, 10) housing pins (16, 18) formed in two parts separated by a surface, which when they assume a predetermined axial and rotational position enable the plug (6) to rotate relative to the cylinder (8) under the control of a key inserted into a corresponding longitudinal seat (14) provided in the plug (6) and interacting with the end of said pins which extend into said seat, characterised in that: the lateral surface of the plug (6) and/or of the cylinder (8) is defined by the rotation of a non-rectilinear generating line about the plug axis; the surface of discontinuity between the two constituent parts of each pin (16, 18) being shaped such that when the pin (16, 18) assumes within the respective recess that axial and rotational position corresponding to plug release, said surface of discontinuity presents a profile analogous to the surface generated by the rotation of said generating line. |
