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Pressurizing module and blood pressure measuring device including the same

  • US 8,591,424 B2
  • Filed: 09/16/2009
  • Issued: 11/26/2013
  • Est. Priority Date: 11/12/2008
  • Status: Expired due to Fees
First Claim
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1. A pressurizing module comprising:

  • a driving block for discharging compressed air; and

    a bellows-type airbag formed to overlap the driving block;

    wherein the bellows type airbag is adapted to lie in a direction between the driving block and a body part where blood pressure is being evaluated;

    the bellows-type airbag comprising an inner space for accommodating the compressed air discharged from the driving block;

    a plurality of wrinkles flattened so as to expand the inner space, the plurality of wrinkles being disposed around the inner space; and

    a pressurizing surface formed at an end portion of the wrinkles and spaced apart from the driving block as the inner space expands;

    wherein the driving block comprises a motor having a rotation shaft, a cam for converting rotary motion of the rotation shaft into a reciprocating motion in a direction perpendicular to an extension direction of the rotation shaft, a cylinder having a piston which is connected to the cam, where the piston reciprocates within the cylinder; and

    an injecting path formed between the cylinder and the bellows-type airbag so that the compressed air generated by the reciprocating motion of the piston moves toward the bellows-type airbag,wherein the motor, the cam, the cylinder and the injecting path are disposed on the same plane as the plane of the driving block that is parallel to the extension direction of the rotation shaft and the reciprocation motion direction of the cam and is perpendicular to the direction between the driving block and the bellows-type airbag; and

    a coupling block having a connection path to the bellows-type airbag;

    the coupling block being interposed between the driving block and the bellows-type airbag and induces the compressed air discharged from the driving block to flow into the inner space of the bellows-type airbag;

    wherein the coupling block comprises a buffer chamber inside the coupling block in order to suppress a fast inflow of air into the inner space of the bellows-type airbag.

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