Keyboard for typewriters, printers or the like
AssigneeTa Triumph-Alder Aktiengesellschaft
InventorsGunter Buttner, Friedrich Forschner, Manfred Fuchtenkort, Rudolf Schmeykal, Alfred Wieland
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Abstract
In a keyboard for typewriters, printers or the like, where a contact bearing film is disposed underneath the keys, there is provided for achieving a cost-efficient arrangement, while avoiding the use of separate restoring springs, that the contact bearing film (10) has U-shaped cut-outs (11) in the area of the keys (1), the film tongues (12) are bent by 180.degree. and are acted upon by the key tappet (3) of the keys (1), the contacts (14, 15) formed between the base of the film, the underside of the film tongue (12), and the film tongue (12) act at the same time as a restoring spring.
Claims7
A keyboard for typewriters, printers, input devices for data processing apparatus or the like, comprising
- a support plate, a film disposed on the support plate having printed contacts and strip conductors thereon, and a guide arrangement connected with the support plate for a plurality of keys,
- each key being provided with a key head and a key tappet having a free end in such a way that the keys can be operated and guided vertically to the plane of the support plate, the free end of the key tappet making contact with at least one said contact when being operated,
- a tongue (12) stamped out of said contact carried by said film in an area underneath each said key tappet and bent inwardly by approximately 180.degree. to assume an approximate U-shape, said bent tongue resting under the free end of each said key tappet (3), said contacts being disposed in the areas of the bent film tongue (12) and the film (10) which face each other.
Dependencies are inferred from the claim text.