Re: HP-97 card reader repair Message #2 Posted by Andrés C Rodríguez on 9 Nov 1999, 12:02 p.m., in response to message #1 by Brian Keller
Such "microswitch", at least on the handhelds, is made with a long and thin, elastic, gold-plated "leaf" that arches when pushed on one end, so making contact with the printed circuit board. Now, what makes the leaf bend ? A small plastic piece (sort of a cylinder, no more than 2 mm in diameter), that protrudes on the card track, and that is pushed by the card. The cylinder, in turn, pushes the "leaf" and, forcing it to arch and close the contacts, signalling the card insertion. Please disregard any idiomatic mistake, I hope this may help you.
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