Extraction device for memory card

An extraction device employed in a body of an electronic device for receiving and extracting a memory card, the extraction device comprising:

• a first housing fixed to the body;
• a second housing slidably received in the first housing and configured for receiving the memory card, the second housing comprising an identifying pin connecting portion and a plurality of communicating pin connecting portions arranged therein;
• an engaging member manually operable by a user and configured to selectively engage in the second housing or disengage from the second housing;
• a circuit board;
• an identifying pin comprising two opposite terminals, one of the terminals connected to the circuit board and the other of the terminals received by and electrically suspended in the first housing, the suspended terminal of the identifying pin connecting with the identifying pin connecting portion when the second housing is engaged in the first housing;
• a plurality of communicating pins, each communicating pin comprising two opposite terminals, one of the terminals connected to the circuit board and the other of the terminals received by and electrically suspended in the first housing, the suspended terminal of each of the communicating pins extending further into the first housing than the suspended terminal of the identifying pin, the suspended terminals of the communicating pins connecting with the communicating pin connecting portions, respectively, when the second housing is engaged in the first housing;
• a first elastic member received in the first housing and arranged to drive the second housing away from the first housing when the engaging member is disengaged from the second housing such that the identifying pin disconnects from the identifying pin connecting portion;
• a popping delay member received in the first housing and configured to provide delayed popping of the second housing out of the first housing when the identifying pin and the identifying pin connecting portion become disconnected;
• and
• a processor mounted on the circuit board, configured to determine that the memory card is being taken out when the identifying pin and the identifying pin connecting portion become disconnected, and configured to execute a program to save data in the memory card upon making such determination, wherein the delay performed by the popping delay member is the same as or longer than a period of time of execution of the program such that the communicating pin connecting portions remain connected with the communicating pins during the execution of the program.