Patent ID: 7963788

Claim:
An electrical connector used to electrically connect a module to a circuit substrate, comprising: an insulative housing comprising a bottom wall, and four sidewalls extending upwardly from the bottom wall, each of the sidewalls defining at least a pair of datum blocks coplanar to each other and inner surfaces of the datum blocks on the same sidewall being in one plane, the datum blocks jointly defining a space to receive the module; a plurality of contacts received in the bottom wall of the insulative housing and adjacent to one of the sidewalls, one of the sidewalls in a front housing opposite to one of the sidewalls in a back housing defining an opening corresponding to the contacts; and a metal cover being pivotally assembled on the insulative housing and moving between an opened position to a closed position; wherein other sidewalls, each defines a groove at one end, and a recess at the other end and a lock portion near the recess; wherein the cover comprises a flat body plate and two flanges extending downwardly from the body plate; wherein the flange defines a column-shaped pin shaft received in the groove and can move in the groove; and wherein the bottom wall comprises a slot impenetrating the bottom wall, the slot is located under the datum block and one can see the inner surface of the datum block from the bottom surface of the bottom wall through the slot.