Pressure plate for mines, in particular anti-tank mines, and mine comprising same

Mine comprising a pressure plate and adapted to be triggered by complete depression of the pressure plate, which incorporates a hydraulic circuit comprising a pressure chamber containing a fluid that is compressed by force applied to the pressure plate, a depressurization unit through which said fluid is evacuated from said pressure chamber in a controled manner in response to a sustained forc greater than a predetermined threshold being applied to the pressure plate, and a bistable member adapted to move between a first position in which it prevents communication between said pressure chamber and said depressurization unit and a second position in which it establishes communication between said pressure chamber and said depressurization unit, the arrangement being such that said bistable member is initially in said first position when no force is exerted on the pressure plate and remains in said first position so long as the pressure plate is subjected to an increasing or stable force and switches to said second position when the pressure of said fluid decreases after it has increased due to a force of this kind whereby, after increasing to a maximum value and then decreasing to a minimum value, an increase in said force results in depressurization of said fluid and complete depression of the pressure plate, so triggering the mine.