Patent ID: 8926645
Filing Date: 2015-01-06
Classification: A61B

Abstract:
1. A disposable lancing device comprising: a housing; a spring member; a lancet having a puncture member at a distal end thereof, being housed in the housing, being configured to be prevented from rotation about a center axis thereof, and adapted to travel forward in an extension direction thereof urged by the spring member so that the puncture member extends out from the housing; a locking ring disposed within the housing such that the lancet is allowed to travel forward through the locking ring; a rotation-preventing protrusion provided to the lancet and being configured such that in an initial position of the lancet, the rotation-preventing protrusion is placed within and engaged with the locking ring in order to prevent a rotation of the locking ring in a circumferential direction relative to the housing; and that in a puncture-ready position of the lancet where the lancet travels forward from the initial position of the lancet, the rotation-preventing protrusion is placed outside the locking ring so as to allow the rotation of the locking ring in the circumferential direction relative to the housing; a locking protrusion provided to the lancet at a position more closer to a proximal end of the lancet than that of the rotation-preventing protrusion, and being configured such that in the puncture-ready position of the lancet, the locking protrusion is engaged by the locking ring so as to hold the lancet in the puncture-ready position located deep in the housing with the spring member being compressed; and an operating member adapted to rotate the locking ring so as to disengage the locking protrusion from the locking ring to thereby travel further forward the lancet by means of the spring member to carry out a puncturing operation.