Fully automatic device used for extracting blood samples from cards

A fully automatic device used for extracting blood samples from cards comprising an analysis module, a grab module set on said analysis module, an outlet set on a bottom of said grab module, an inlet communicating with said outlet set on the top of said analysis module, and a test card passage formed between said outlet and said inlet;

• wherein said grab module includes an upper case, a plurality of material boxes used to store a plurality of test cards that are arranged at an inner bottom of said upper case, and a grabbing mechanism used to grab a test card of the plurality of test cards;
• said analysis module includes a lower case, a holder arranged inside said lower case, the test card conveying mechanism arranged on the holder, a camera with a light source used to detect a position of a blood sample on the test card, an elution mechanism used to elute a blood sample from the test card that has arrived, and a drying system used to dry the test card that has been eluted;
• said elution mechanism includes a first tightly-fitting head and a second tightly-fitting head that are arranged one in front of another, a gap through which the test card can pass is set between said first tightly-fitting head and said second tightly-fitting head, a tightly-fitting head driving motor that drives said second tightly-fitting head to move toward said first tightly-fitting head is arranged behind said second tightly-fitting head;
• a first flow passage is set inside said first tightly-fitting head, and a first cavity communicating with said first flow passage is formed at a rear-end of said first flow passage, a second flow passage is set inside said second tightly-fitting head, and a second cavity communicating with said second flow passage is formed at a front-end of said second flow passage;
• said first flow passage, said first cavity, said second flow passage and said second cavity are all coaxially arranged, and an opening of the first and second cavities are same in size, and an elution cavity is formed when the first and second cavities are close together;
• and
• the volume of said first cavity is greater than the volume of said second cavity, said first cavity is conical in shape, and said second cavity is flat in shape.