Card reader

A card reader, comprising:

• a housing, said housing comprising a USB standard casing and a holder block fastened to a rear side of said USB standard casing;
• said USB standard casing defining therein an accommodation chamber, said holder block defining an insertion hole for the insertion of an electronic card, said insertion hole being disposed in communication with said accommodation chamber perpendicularly;
• an electric module mounted in said housing, said electric module comprising a circuit board mounted in said accommodation chamber of said USB standard casing, said circuit board comprising a first contact set configured subject to the USB specification and a second contact set disposed remote from said first contact set, and an electric connector perpendicularly mounted on said circuit board and electrically connected to said second contact set and kept in proximity to said insertion hole for the contact of an electronic card electrically;
• and
• an expansion device, said expansion device comprising an electrically insulative rack fastened to a bottom wall of said circuit board of said electric module and defining with a bottom wall of said USB standard casing an insertion space for the insertion of an electronic card, and a plurality of conducting terminals mounted in said electrically insulative rack, each conducting terminal of said expansion device comprising a solder end electrically connected to said circuit board and a contact end obliquely protruding over a bottom wall of said electrically insulative rack and suspending in said insertion space for the contact of an electronic card.