Quick connecting device for electric cords

A quick connecting device, comprising:

• a first connector having a first end formed with a first receiving chamber and a second end formed with a second receiving chamber;
• a metallic mounting ring mounted in the first receiving chamber of the first connector and having a first end formed with a receiving space and a second end formed with a passage;
• a first electric cord having a distal end extended through the second receiving chamber of the first connector and provided with first exposed electric wires extended into the receiving space of the mounting ring;
• a second connector having a first end formed with a mounting chamber mounted on the first connector and a second end formed with a through hole;
• a second electric cord having a distal end extended through the through hole of the second connector into the mounting chamber and provided with second exposed electric wires;
• a metallic conductive plug secured on the second exposed electric wires of the second electric cord and inserted into the receiving space of the mounting ring to contact the first exposed electric wires of the first electric cord so as to connect the second electric cord to the first electric cord;
• an elastic member biased between the second connector and the conductive plug;
• and
• wherein the first end of the first connector has an end portion formed with two radially opposite cutouts each connected to the first receiving chamber so that the mounting ring is exposed from the cutouts of the first connector.