FORCE FEEDBACK MECHANISM FOR AN AIRCRAFT CONTROL MINI-STICK AND AIRCRAFT CONTROL DEVICE HAVING SUCH A MECHANISM

摘要

This force return mechanism (1) comprises a fixed frame (10) intended to be secured to a chassis of the aircraft, at least one spring (60, 61) opposing the displacement of the mini-stick (2) relative to to the frame, and mechanical motion transmission means (20, 30, 40, 41, 50, 51) carried by the frame movably and adapted to transmit a rotational movement about a first axis of rotation ( X1), between the mini-stick and the at least one spring by applying a force law according to which the resistance force, which said at least one spring opposes, via the transmission means, to the rotary displacement of the mini-stick around the first axis of rotation, is dependent on the angular position of the minimap around the first axis of rotation, this force law comprising at least one part including at least one force jump which corresponds to a discontinuity of the intensity of the effort of resistance without a change of meaning of this effort of res istance. In order for this force return mechanism to be more precise, more compact and more reliable, the transmission means comprise a cam (30), which is adapted to be connected to the rotating mini-bar around the first axis of rotation and which is provided with at least one profiled surface (32, 33) which is shaped to define said at least a portion of the force law.