Patent ID: 7090536

Claim:
An electrical connector comprising: an insulative housing defining a pair of side arms and a rear connection bar, a space defined among the pair of side arms and the rear connection bar, said space including a first portion and a second portion along a vertical direction for receiving a first card and a second card, respectively; a plurality of first contacts disposed in the rear connection bar; a plurality of second contacts disposed in the second portion; a moveable plate up-and-down moveable in the housing; a moveable stopper device located around the side arm to latch or unlatch said movable plate; wherein when the first card is inserted into the space, the stopper device will unlock the moveable plate to allow the moveable plate to move for not blocking full insertion of said first card into the first portion; when the second card is inserted into the space, the stopper device will lock the moveable plate so as to prevent said second card from insertion into the first portion but only being allowed to be inserted into the second portion.