I'm trying to understand the switch mechanism on sleeve of this jack - I can't work out what it is.
3 is sleeve, 4 is sleeve switch
But what is operation? Is the sleeve switch N/O and connected to sleeve through the jack inserted?
Part is pj-327a5-smt. https://datasheet.lcsc.com/szlcsc/1903151105_XKB-Enterprise-PJ-327A0-SMT_C381135.pdf