Electric key for keyboard, has spring element for forming two concave spring element parts with reduced width and height at releasing point, where spring element parts cause spring stage of force-displacement-characteristic curve

摘要

The key (10) has a spring system with a spring element (22) and a compression spring (24), where the spring element is concavely bulged in an unactuated condition of the key such that the spring element causes a spring stage (16) of a force-displacement-characteristic curve until a releasing point is reached. The spring element forms two concave spring element parts (22a) with reduced width and height at the releasing point, where the parts cause another spring stage (18) of the characteristic curve. The compression spring is made of rubber, silicone and/or fiber composite materials.