| 摘要 |
A key device for producing binary codes, wherein an output shaft is rotated by any of separately provided keys in sliding contact with the inner wall of a hole penetrating an outer casing; a plurality of push pin assemblies are provided; a plurality of switch means are arranged each corresponding to each push pin assembly; there are separately provided a plurality of keys for rotating an output shaft, each of which has longer and shorter grooves to push each push pin assembly; each push pin assembly normally locks the output shaft to the outer casing; each push pin assembly is formed of at least first, second and third linearly arranged unit pins; when pushed by either or both of the longer grooves and shorter grooves, each push pin assembly unlocks the output shaft for rotation; when the output shaft is rotated through a prescribed angle, each push pin assembly selectively operates the corresponding switch means according to the lengths of the longer and shorter grooves by which said push pin assembly is pushed, thereby producing a binary code exclusively represented by a key used.
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