| 摘要 |
The invention relates to a locking device provided with a control unit which displays in a simple and highly-reliable manner whether a closed object provided with said locking device is already opened or not. The inventive control units make it possible to overlay a first opening by an irreversible colour change on at least one part of the locking device, thereby making the manipulation thereof visible. Said invention relates to a range of colour changing mechanisms which are characterised in that the locking device consisting of at least two locking elements which are movable with respect to each other when the locking device is opened, thereby activating the colour changing mechanisms. |
