Device for detecting the absence of a mechanical barrier for a missile and missile comprising such a device

A missile (M), comprising at least one device for detecting an absence of a mechanical barrier for the missile (M), each of the at least one device comprising:

• at least one rod constrained by a first elastic element and provided with an end referred to as free capable of coming into contact with the mechanical barrier, and
• at least one cam constrained by a second elastic element, the rod and the cam being configured so that the rod can assume one of the following positions:
• a position referred to as initial entry (P1), wherein the rod is held in a stable position between the cam and the mechanical barrier;
• a position referred to as extended (P2), into which the rod is brought under an action of the cam by a displacement in a direction (E) of a free end, in the absence of the mechanical barrier;
• and
• a position referred to as final entry (P3), into which the rod is brought under an action of the first elastic element, after release of the displacement of the rod by the cam.