Patent ID: 8439941
Filing Date: 2013-05-14
Classification: A61B

Abstract:
1. A disposable lancing device comprising: a housing; a spring member; a lancet having a puncture member provided at a distal end thereof, the lancet being housed in the housing and urged by the spring member such that the puncture member is configured to extend out from the housing and carry out a puncturing operation; a locking ring disposed within the housing such that the lancet is allowed to displace in an extension direction through the locking ring; a locking protrusion extending from the lancet and adapted to be engaged by the locking ring so as to hold the lancet in a puncture-ready position located deep in the housing with the spring member being compressed; an operating member adapted to carry out the puncturing operation by rotating the locking ring so as to disengage the locking protrusion from the locking ring and displace the lancet in the extension direction by means of the spring member; and a reuse-preventing protrusion provided on the lancet and configured to prevent the locking protrusion from being re-engaged by the locking ring such that with the locking ring located at a rotational position representing that the locking protrusion has been disengaged and the puncturing operation of the lancet has been carried out, as the lancet is pushed and displaced deep into the housing the reuse-preventing protrusion comes into abutment against the locking ring so as to limit deep displacement of the lancet relative to the locking ring, wherein