An operation detection switch capable of reproducing the manner of
performance in which the speed of depressing an operating portion changes
in the middle of a key action and of achieving a reduced manufacturing
cost. The operation detection switch includes a switch main body and legs.
A fulcrum projection, a first extending portion, protrusion and a second
extending portion are provided in sequence along one end to the other end
of and extending from the switch main body. Furthermore, a pressure
projection is provided on the other end of the switch main body. Movable
contacts corresponding to fixed contacts formed on a printed circuit board
are formed at the tips of the first and the second extending portions. The
operation detection switch and the printed circuit board constitute a
detection device for detecting the depressing action of the key.
