Card socket, card connector, and manufacturing method therefor

A card socket which is configured to electrically connect first and second cards, each provided with a terminal unit, to an electronic device, the card socket comprising:

• a conductive shell;
• a nonconductive middle plate;
• an upper contact terminal;
• and
• a lower housing provided with a lower contact terminal,
• wherein the upper contact terminal is integrally coupled to the conductive shell with the nonconductive middle plate being interposed therebetween, wherein the conductive shell is coupled to the lower housing to form therein an accommodation space which is configured to accommodate both the first and second cards simultaneously, wherein the upper contact terminal is configured to be electrically connected to the terminal unit of the first card, wherein the lower contact terminal is configured to be electrically connected to the terminal unit of the second card, wherein the upper contact terminal is not configured to be electrically connected to the terminal unit of the second card, and wherein the lower contact terminal is not configured to be electrically connected to the terminal unit of the first card.