Security tag, which can be fitted to an object, for signalling an attempted theft

摘要

The security tag (10) has a housing (11) and a clasp (12), which can move longitudinally therein, in the manner of a padlock. In its closed position, a piston (20), which is prestressed by a spring (21), engages into a gap or interruption (15) in the clasp (12). In order to open the clasp (12), a reduced-pressure source, which raises the piston (20), is placed onto a projection (28), so that the said piston releases the clasp (12). The use of a reduced-pressure source exacerbates the unauthorized opening of the security tag.