| 摘要 |
The lock comprises: a fixed bush (10) which defines a cylindrical cavity (14) within which a cylinder (18) rotating about the longitudinal axis (16) of the cavity (14) is mounted; a spring (30) for retaining the cylinder (18) within the cavity (14) in the axial direction, the spring (30) being interposed between a first circumferential groove (32) made in the external lateral surface of the proximal portion of the cylinder (18) and a facing slot (34) made in the wall of the cavity (14); and interference means suitable for preventing the rotation of the cylinder (18) within the cavity (14) when the cylinder (18) is pushed towards the distal extremity of the bush (10). A plurality of circumferentially spaced reliefs (40), extending each for an arc of a circle, radially protrude from a circumferential section of the external surface of the proximal portion of the cylinder (18), which reliefs bear in normal conditions against a circumferential flange (42) which radially protrudes inwards from the internal surface of the bush (10). Moreover, a second circumferential groove (36) flanking the first groove (32), from which it is separated by a circumferential wall (38), is made in the external lateral surface of the proximal portion of the cylinder (18). |
