Card connector with two spring-loaded mechanisms for inserting and ejecting the card

A card connector, comprising:

• an insulating holder base comprising a plug-in space inside, said plug-in space with a bottom plate and an insertion opening, and two raised partitions formed in said plug-in space to define a first slideway and a second slideway in two opposite lateral sides of said plug-in space;
• a terminal set comprising a plurality of conductive terminals pierced through said bottom plate of said plug-in space;
• a push-push mechanism comprising a main sliding seat arranged in said first slideway and an auxiliary sliding seat arranged in said second slideway, a first elastic member provided between said main sliding seat and a first positioning inner wall of said first slideway and a second elastic member provided between said auxiliary sliding seat and a second positioning inner wall of said second slideway, said main sliding seat and said auxiliary sliding seat being each in an independent structure, said main sliding seat comprising a first resisting arm extended from one end thereof toward said plug-in space, a cyclic guide groove provided on an opposite end thereof opposite to said first resisting arm and a guide rod, said guide rod having one end thereof used for sliding positioning in said guide groove and an opposite end thereof installed in said insulating holder base, said auxiliary sliding seat comprising a second resisting arm extended from one side thereof toward said plug-in space, said first resisting arm and said second resisting arm being used for resisting and moving a combined structure of a preset SIM card and a tray, so that when said main sliding seat and said auxiliary sliding seat are moving, said main sliding seat has a greater resistance than said auxiliary sliding seat;
• and
• a shielding shell covered and assembled on an outside of said insulating holder base and said push-push mechanism, said shielding shell comprising a pressing piece pressed downward against a top side of said guide rod.