Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
A keyboard comprises a sensor plate 1, a spring plate 2 and a flexible cover plate 3 which are arranged on top of each other. Cover plate 3 of molded plastic has frustrum-like raised lands at the key locations. Each land is provided with a cover 4 bearing the character symbol associated with the respective key 5. At each key location, spring plate 2 has two spring tongues 6 and 7. Spring tongue 6 is formed by a U-shaped recess 9 in spring plate 2, and is bent upwards from the plane of the latter in such a manner that in the area of the hollow frustrum it rests against bottom 9 of the cover plate. Spring tongue 7 is formed by a U-shaped recess 10 in spring tongue 6.