| 摘要 |
The invention relates to fastening devices used to prevent unauthorised disassembly of closed structures, wherein the contents need to be accessible for a service mechanic but not for the general public. The fastening device has two main elements (1, 2) that have to perform relative rotation in order to undone. The invention is characterised by the external influence enabling the fastening device to be undone or not being a rotational movement, by means of a second tool, of a component (5) within a locking arrangement, thereby either causing a locking stud (7) to engage a locking recess (13) in a fixedly arranged component (12; 20), preventing the female element (2) to follow the movement of the male element (1), thereby providing relative rotation, or causing said locking stud to be displaced out of said engagement, whereby the female element will follow the male element without relative rotation, in dependence of the rotational direction of the component (5), said component of the locking arrangement being located so as to be difficult to access, inside a small hole (11) in the closed structure. |
