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Blood test device

  • US 8,556,828 B2
  • Filed: 02/09/2007
  • Issued: 10/15/2013
  • Est. Priority Date: 02/09/2006
  • Status: Active Grant
First Claim
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1. A blood test apparatus comprising:

  • a housing which comprises a chassis;

    an internal cylinder body which is provided at one side of the housing;

    a reciprocator that moves back and forth inside the internal cylinder body;

    a blood collection needle which is connected to the reciprocator;

    a blood sensor to which the blood collection needle is directed and provided at a tip part of the internal cylinder body, the blood sensor havinga base plate;

    a storage which is provided in the base plate and which collects blood from skin punctured with the blood collection needle;

    a supply channel, one end of which is connected to the storage, and into which the blood in the storage flows by capillary action;

    an air hole provided at an other end of the supply channel;

    a detector provided inside the supply channel;

    a plurality of detection electrodes which configure the detector; and

    a plurality of connection electrodes provided on an outer periphery of the base plate being derived from each of the plurality of detection electrodes;

    a measuring circuit to which a signal of the blood sensor is supplied;

    a negative pressure provider which is drivable in dependence on the measuring circuit; and

    an external cylinder body which covers the internal cylinder body and comprises an opening part at a tip side of the internal cylinder body, and is provided so as to be movable relative to the internal cylinder body and to return to a predetermined relative position,wherein the negative pressure provider is configured to create a negative pressure inside the external cylinder body.

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