PIANO KEY SWITCH Russian patent published in 1994 - IPC

FIELD: computer engineering, instrumentation engineering household appliances, electronic radio engineering and other devices employing manual input of signals. SUBSTANCE: switch has key 1 installed in slot 5 on panel 4, fixed contact 6 and movable contact made in form of flat L-shaped lever 2 one end of which is rigidly connected to key and other end is pressed by resilient member 3 to panel 4. Resilient member is made in form of resilient rods or flat spring and is rigidly secured by one end on panel and by other end, on lever. Resilient member plays two parts: it returns movable contact and key in initial position when key is released and stabilizes trajectory of movement of movable contact relative to board. EFFECT: enlarged operating capabilities. 5 cl, 2 dwg