Patent ID: 8528372

Claim:
A security device comprising: a clasping member for enclosing an object to be secured, the clasping member comprising a conducting member; a locking member connected to the clasping member, such that the locking member and the clasping member form a loop, the locking member in turn comprising: a gear member comprising a protruding profile, the gear member extending in a first plane with the protruding profile raised from the first plane, a manoeuvring member extending in a second plane parallel to the first plane, the manoeuvring member being rotatable relative the gear member and comprising a latch member biased towards the first plane arranged to engage the gear member, such that rotation of the manoeuvring member in one direction causes a narrowing of the loop whereas rotation in the opposite direction causing a widening of the loop is prevented through the engagement of the latch member with the protruding profile, the security device further comprising a drum for winding up the clasping member such that rotation of the manoeuvring member causes rotation of the drum and thereby adjustment of the width of the loop, the clasping member and the locking member further forming part of an alarm circuit, wherein the locking member further comprises a movable element electrically connected to the alarm circuit and positioned next to an elastic element, so that an external pulling force applied to the clasping member with the latch member locked in one of protrusions of the protruding profile causes a movement of the movable element towards the elastic element deforming the latter thereby interrupting the alarm circuit and activating an alarm signal.