Magnetically bistable axisymmetric linear actuator with pole contour, device with this and switching matrix for tactile applications

摘要

Magnetically bistable axisymmetric linear actuator (A) for tactile applications with a hard magnetic rod (1) which is widened like a dish (1b) at one end and with a arranged on a circuit board coil (3), in which the rod (1) free is movable in the axial direction, characterized in that the rod (1) consists of a material having a very high coercive force, that this axially surrounded by at most equal length, hard magnetic sleeve (2) with significantly lower coercive force and is free to move in the axial direction and that the travel of the rod (1) is determined by its excess length (h) compared to the length of the hard magnetic sleeve (2) such that at one end of the rod (1) an auxiliary pole (1a) and at the opposite End forms a plate-like main pole (1b).