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TUBE UNIT, CONTROL UNIT, AND MICROPUMP

  • US 20100143168A1
  • Filed: 11/23/2009
  • Published: 06/10/2010
  • Est. Priority Date: 12/05/2008
  • Status: Active Grant
First Claim
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1. A micropump comprising:

  • a tube unit which includes a tube having elasticity and a circular-arc-shaped part, a plurality of fingers extending in radial directions from the circular-arc center of the circular-arc shape of the tube, and a tube guide frame which holds the tube and the plural fingers;

    a control unit which includes a cam for sequentially pressing the plural fingers from a fluid flow-in side to a fluid flow-out side of the tube, a rotor for giving rotational force to the cam, and an oscillator having a piezoelectric element and a projection disposed at an end in a longitudinal direction to contact the rotor;

    a reservoir which communicates with a flow inlet portion of the tube;

    a control circuit unit which inputs a drive signal to the piezoelectric element; and

    a power source which supplies power to the control circuit unit,whereinthe tube unit is attachable to and detachable from the control unit substantially in the horizontal direction with respect to the rotation flat plane of the cam, andthe oscillator is oscillated by applying alternating voltage to the piezoelectric element, rotational force is repeatedly given to the rotor from a projection, the plural fingers are sequentially pressed by the cam from the flow-in side to the flow-out side of fluid, and fluid is transported by repeating closure and open of the tube.

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