Card connector

A card connector adapted for receiving two kinds of cards therein, comprising:

• an insulating housing defining a first receiving chamber at a top thereof for receiving one card therein and a second receiving chamber separated from the first receiving chamber and under the first receiving chamber for receiving the other card therein;
• a plurality of first and second electrical terminals disposed in the insulating housing and respectively stretching into the first receiving chamber and the second receiving chamber for electrically contacting the corresponding card;
• and
• a fool-proofing mechanism including a fool-proofing member and an elastic element, the fool-proofing member having a pivot pillar vertically pivoted in a front of one side of the insulating housing, a first fool-proofing portion and a second fool-proofing portion which are protruded on an outside face of the pivot pillar and apart designed at an upper position and a lower position of the pivot pillar at an angle seen from a vertical view, the elastic element being put around a top of the pivot pillar to make the first fool-proofing portion hidden in the front of the one side of the insulating housing and the second fool-proofing portion stretched in the second receiving chamber for blocking the other card from being inserted into the second receiving chamber when the one card is received in the first receiving chamber, the first fool-proofing portion stretching into the first receiving chamber under the rotation drive of the fool-proofing member which is realized by the other card being inserted into the second receiving chamber to push rearward the second fool-proofing portion so as to block the one card from being inserted into the first receiving chamber;
• wherein the outside face of the upper position of the pivot pillar further protrudes outward to form a biasing portion, the elastic element is a torsional spring with one end thereof being fastened in the insulating housing and the other end thereof resisting against a distal side of the biasing portion.