Patent ID: 7044765

Claim:
A matrix board to board connector assembly comprising: a first connector including a first insulating housing and a plurality of first conducting terminals, the first insulating housing having a first base plate and side walls extending upwardly and vertically from edges of the first base plate, the first conducting terminals being fixed in the first base plate and arranged in matrix array; and a second connector including a second insulating housing and a plurality of second conducting terminals, the second insulating housing having a second base plate and leading walls extending downwardly and vertically from edges of the second base plate, the second conducting terminals being fixed in the second base plate and arranged in matrix array; wherein the first base plate defines indentations in the side walls for the leading wall of the second connector being inserted therein to latch the first connector and the second connector when the first connector and the second connector are mated; a fixing slot and a holding slot are formed in the leading wall, the fixing slot opens to a top surface of the leading wall, the holding slot communicates with the fixing slot and is exposed to an outer side of the leading wall; the first connector further includes a first locking piece fixed to the side wall of the first insulating housing, the first locking piece has a locking portion bent from a lower edge thereof and extending sideward and outward; and the second connector further includes a second locking piece which has an elastic portion, the second locking piece is fixed in the fixing slot with the elastic portion partially received in the holding slot and partially extended out of the holding slot, the elastic portion is configured to provide a spring end, the spring end is firstly protruded and then concaved at its free end, during mating of the first and the second connectors, the spring end is firstly deflected and then elastically recovered to hit on the locking portion of the first locking piece with a click to insure that the first and the second connectors have been properly mated.