Double visual-interface socket

A double visual-interface socket, compliant with socket design rules set forth in the Digital Visual Interface (DVI) standard, the double visual-interface socket comprising:

• a frame, having a positioning wall and a bottom plate coupled perpendicularly with the positioning wall;
• a lower socket unit, provided transversely at the positioning wall and comprising a plurality of terminal pins, each said terminal pin having a bottom end facing a plane where a bottom surface of the bottom plate is located;
• an upper socket unit, provided transversely at the positioning wall and above the lower socket unit while comprising a plurality of terminal pins;
• an adapter module, comprising a plurality of L-shaped pins arranged in rows, the L-shaped pins corresponding in arrangement to the terminal pins of the lower socket unit;
• and
• a circuit board, provided adjacent to the positioning wall and having:
• a plurality of terminal guide holes, wherein the terminal pins of the upper socket unit are inserted respectively into the terminal guide holes so as to be electrically connected therewith by soldering;
• and
• a plurality of extension guide holes, each electrically connected with a corresponding said terminal guide hole, wherein the L-shaped pins of the adapter module have ends inserted respectively into the extension guide holes so as to be electrically connected therewith by soldering, and the L-shaped pins of the adapter module further have opposite ends substantially aligned with the bottom ends of the terminal pins of the lower socket unit.