Fig. 1

Diagram of LeMMS. a Schematic diagram of the LeMMS. F_F is the finger exerted force, F_M the repulsive force between magnets, F_SW the force exerted by the micro-switch spring and X_F, X_M, X_SW are the respective distances from the rotation axis. The vertical linear displacement d is the first approximation of the rotation angle. b LeMMS half-shell with brass pin (a1), magnet (a2) and micro-switch (a3). c Illustration of the LeMMS assembled