Multilayer electronic card connector with ejector

A multilayer electronic card connector, comprising:

• a base, in which a baffle for separating the base into an upper slot and a lower slot is positioned, wherein the baffle defines a bottom surface of the upper slot and a top surface of the lower slot, the upper slot may accommodate at least one upper electrical card, the lower slot and may accommodate at least one lower electrical card;
• at least one row of upper terminals disposed in the base, wherein each of the upper terminals has a contact disposed in the upper slot;
• at least one row of lower terminals disposed in the base, wherein each of the lower terminals has a contact disposed in the lower slot;
• and
• an ejector disposed in the base, wherein the ejector comprises:
• a core having a sliding slot defining a circulation path, wherein one end of the sliding slot has a concave positioning point, the other end of the sliding slot has a starting point, such that unidirectional circulation successively from the starting point to the positioning point and then to the starting point is formed;
• a sliding sheet, which may slide back and forth relatively to the base, wherein the sliding sheet has a first pushing portion and a second pushing portion, the first pushing portion is disposed in the lower slot, and the second pushing portion is disposed in the upper slot;
• a guiding rod having one end engaged into the sliding slot of the core and being slidable along the circulation path;
• and
• an elastic member for providing elasticity for moving the sliding sheet into the base and then returning the sliding sheet to a home position, wherein:
• when the lower electrical card is inserted into the lower slot, the lower electrical card can rest against the first pushing portion to push the sliding sheet to slide relatively to the base;
• and
• when the upper electrical card is inserted into the upper slot, the upper electrical card can rest against the second pushing portion to push the sliding sheet to slide relatively to the base.