Keyelement

Details Keyelement Keyelement

H - Electricity

03

M

340/177

H03M 11/00 (2006.01) H03K 17/972 (2006.01)

Patent

CA 1204841

A B S T R A C T Summary In order to have a large flexibiliy of application with simultaneously a reasonable number of different piece parts for a so called transformer key- board the key element is subdivided. A base (1) usable for all applications includes elements for the protection against rotation (14) and for fixing (13) it on a printed circuit board (6) without screws and without soldering operations, further elements to guide (18) the stem (2) and to limit its stroke. The stem receives a ferromagnetic core (4) within its guidance (21). The shape and the size of wall portions (2', 22) change in accordance with the desired raster of the keyboard wherein the key element is used. A cap (3) carrying the marking has the same shape for all stems and is connected to the stem in a detatchable manner (27, 33). Due to their small height these key elements are especially suited in applications for data terminal keyboards with an ergonomically good design.

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