| 摘要 |
<p>The device is used in residential and specialized locking systems preventing any forced attempts at unlocking. It includes a casing with a cylindrical hole (1) in which a cylindrical bushing is coaxially housed the movement of which is axially obstructed. The cylindrical bushing (3) houses coaxially a cylindrical core (2) the movement of which coaxially is also obstructed. In the front end of the cylindrical bushing (3) at least one fixation elastic device (4) is mounted to obstruct the free rotative motion of the cylindical bushing (3) towards the casing with a cylindrical hole (1) along the inner front surface of which at least one recess (4a) is fitted, and at least one radial groove (3a) is machined on the internal front surface of the cylindrical bushing (3). 11 claims, 7 figures</p> |
