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摘要

PPROBLEM TO BE SOLVED: To realize low height of a key switch utilizing a link mechanism. PSOLUTION: The key-top 21B has bearing parts 21B-11, 21B-12 on its lower face. The housing 25B has slide guiding parts 25B-11, 25B-12 on its upper face. The first link 31B and the second link 32B have rotating shafts 31-4, 31-5 which are respectively supported rotatably by bearing parts 21B-11, 21B-12 of the key-top 21B, and of which sector gears 31-6, 31-7 are insertion-engaged and made V-shape, and sliding shafts 31B-3a, 31B-3b are respectively insertion-engaged capable of sliding with the slide guiding parts 25B-11, 25B-12. When the key-top 21B is pressed down, the sliding shafts 31B-3a, 31B-3b move in X1, X2 directions and the first and the second links 31B, 32B rotate symmetrically in the direction of becoming flat. PCOPYRIGHT: (C)2007,JPO&INPIT