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Microswitches for Summagraphics digitizer 16-button mouse

Discussion in 'Electronic Components' started by Robert Stankowic, Jun 17, 2004.

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  1. Hello all,

    One of my customers uses several Summagraphics digitizer tablets since about
    12 years and many of the microswitches in the mice became defective over
    the last years.
    I found replacement switches (not the original, but (almost) same
    dimensions, it is the sort of switches used in normal PC - mice). The
    problem is, that the lifetime of these switches is much shorter than the
    Does anybody know a source for the switches originally used in this mice?
    They are about 6 * 6mm wide and 5mm high with 4 leads at the corners and
    have 1 NO contact, which is connected to a pair of leads on each side. A
    fifth lead connects to the metal case.

    o ---connected to shield
    o---|----o ----- two pins connected internally
    o---|----o ----- two pins connected internally

    Thank you for taking the time.
  2. Tim Wescott

    Tim Wescott Guest

    The microswitches I've seen in mice are fairly generic.

    Have you checked the switch companies? Look up "switch" in the Digi-Key
    website, and look for matches. Do the same with Google or AltaVista.
    Once you find some part numbers you can check with the switch
    manufacturer's sites for reliability information.
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