Bistable mechanism for an aircraft door

An aircraft door designed to assume a first configuration in which a first element of the door assumes a first position with respect to a second element of the door, and a second configuration in which the first element assumes a second position with respect to the second element, the aircraft door comprising:

• a bistable mechanism urging the aircraft door toward one or the other of the first and the second configurations,
• the bistable mechanism comprises:
• a first end-fitting (8) comprising a first base (10) fixed to the first element and a first pivot (13) mounted with the ability to rotate on the first base (10);
• a second end-fitting (9) comprising:
• a second base (11) fixed to the first element;
• a lever (18), of which a first end is mounted with the ability to pivot on the second base (11);
• a second pivot (14) mounted with the ability to rotate on the second end of the lever (18);
• a coupling device for coupling the lever (18) to the second element of the door, the coupling device comprising a rotational-driving device (19) centered on an axis of rotation of the lever (18) with respect to the second base (11);
• at least one bow (15) that is elastically deformable in bending and of which a first end (16) is fixed to the first pivot (13) and of which a second end (17) is fixed to the second pivot (14);
• wherein the bistable mechanism has an unstable switchover position in which an axis of rotation of the first pivot (13), the axis of rotation of the lever (18) on the second base (11), and an axis of rotation of the second pivot (14) are aligned;
• and
• wherein in the unstable switchover position, the lever (18) is positioned between the two ends (16, 17) of the bow (15).