Patent ID: 7854622

Claim:
An electrical connecting device adapted to receive a chip unit, the chip unit having a plurality of pins disposed on a bottom of the chip unit, the electrical connecting device comprising: an insulation base, formed with a terminal area and a first pierced hole; a terminal set, disposed correspondingly on the terminal area; a circuit board, disposed under the insulation base and formed with a pad area and a through hole, the pad area being disposed correspondingly to and under the terminal area for the terminal set to be soldered on, the through hole being formed correspondingly to the first pierced hole; a cover, horizontally and slidably covering the insulation base, adapted to receive the chip unit and formed with a plurality of opening holes and a second pierced hole, the plurality of opening holes being formed correspondingly to the terminal area for the pins to pass through and electrically connected to the terminal set: and a driving mechanism, having a metal bushing and a cam, the metal bushing being covered into the first pierced hole and the through hole, the cam having a driven portion extending to form a first cylinder into the first pierced hole, the first cylinder being jointed into the metal bushing correspondingly, a second cylinder off-centered with respect to the first cylinder being formed between the driven portion and the first cylinder and entering the second pierced hole.