Blood lancet device for withdrawing blood for diagnostic purposes
First Claim
1. Blood lancet device for withdrawing blood for diagnostic purposes, comprisinga lancet (34) comprising a metal needle (166,176) with a tip (35),a housing (1) with an outlet (84) for the tip (35) of the lancet (34).a lancet holder (6) located within the housing and connectable to the lancet (34) for holding the lancet (34),a lancet guide means (15b) located within the housing for guiding the lancet holder (6) for movement on a predetermined puncture path, anda lancet drive means (3) located within the housing for moving the lancet (34) in a puncturing and retraction direction comprisingan elastic drive element (9), a locking device (83) for locking said lancet drive in a first position in which the elastic drive element (9) is in a tensioned state and for releasing the tension of the elastic drive element (9) to accomplish a puncturing movement during which the lancet holder (6) is moved at high speed along the predetermined puncture path in a puncturing direction until the tip (35) emerges from the outlet (84) to produce a wound in a body part adjoining the outlet (84) and following which the lancet holder (6) is retracted to a position in which the tip of the lancet (34) is positioned within the housing,the lancet drive (3) further comprising a rotary/sliding transmission system (4) with an input-side transmission member (5) rotatable about an axis of rotation (A) parallel to the predetermined puncture path and coupled to the elastic drive element (9) to be rotated thereby, and with an output-side transmission member connected to the rotatable input-side transmission member (5) for longitudinal displacing the lancet holder (6) in response to rotation of said input-side transmission member (5).
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Accused Products
Abstract
Blood lancet device for withdrawing blood for diagnostic purposes, in which with the aid of a lancet drive (3) in a housing (1) a lancet holder (6) with a lancet (34) positioned in it and moveable along a predetermined, straight puncture path is moved until the tip (35) of the lancet emerges from the outlet (84), in order to produce a wound in a body part adjoining the outlet (84). The lancet holder (6) also serves to retract the lancet (34) into a position in which the tip (35) is again positioned within the housing (1).
In order to make possible a puncture involving especially little pain, the lancet drive (3) has a rotary/sliding transmission system (4) whose input side (16) is formed by a transmission member which is rotatable about an axis of rotation parallel to the predetermined puncture path. This input-side transmission member (5) of the rotary/sliding transmission system is coupled with the elastic drive element (9) of the lancet drive (3) and converts a torque transmitted to the transmission member (5) into a longitudinal displacement in the direction of the predetermined puncture path, which is transmitted to the lancet holder (6).
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Citations
17 Claims
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1. Blood lancet device for withdrawing blood for diagnostic purposes, comprising
a lancet (34) comprising a metal needle (166,176) with a tip (35), a housing (1) with an outlet (84) for the tip (35) of the lancet (34). a lancet holder (6) located within the housing and connectable to the lancet (34) for holding the lancet (34), a lancet guide means (15b) located within the housing for guiding the lancet holder (6) for movement on a predetermined puncture path, and a lancet drive means (3) located within the housing for moving the lancet (34) in a puncturing and retraction direction comprising an elastic drive element (9), a locking device (83) for locking said lancet drive in a first position in which the elastic drive element (9) is in a tensioned state and for releasing the tension of the elastic drive element (9) to accomplish a puncturing movement during which the lancet holder (6) is moved at high speed along the predetermined puncture path in a puncturing direction until the tip (35) emerges from the outlet (84) to produce a wound in a body part adjoining the outlet (84) and following which the lancet holder (6) is retracted to a position in which the tip of the lancet (34) is positioned within the housing, the lancet drive (3) further comprising a rotary/sliding transmission system (4) with an input-side transmission member (5) rotatable about an axis of rotation (A) parallel to the predetermined puncture path and coupled to the elastic drive element (9) to be rotated thereby, and with an output-side transmission member connected to the rotatable input-side transmission member (5) for longitudinal displacing the lancet holder (6) in response to rotation of said input-side transmission member (5).
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9. Blood lancet device for withdrawing blood for diagnostic purposes, comprising
a lancet (34) comprising a metal needle (166, 176) with a tip (35), a plastic body (165) connected to said metal needle (166, 176), and a lancet positioning means (169, 178), a housing (1) with an outlet (84) for the tip (35) of the lancet (34), a lancet holder (6) located within the housing and contacting the lancet (34) for holding the lancet (34) and movable within the housing (1) along a predetermined puncture path, and a lancet drive means (3) located within the housing for moving the lancet in a puncturing direction comprising an elastic drive element (9), a transmission system driven by said elastic drive element to contact and move the lancet positioning means (169, 178) through a precisely defined maximum longitudinal displacement, and wherein the lancet holder accurately positions the lancet positioning means (169, 178) relative to the lancet drive (3) means such that the puncture depth at which during the puncturing movement tip (35) of the lancet (34, 175) emerges from the outlet (84) varies by no more than at most ± - 0.15 mm with unchanged setting of the blood lancet device and successive puncturing movements.
- View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. Blood lancet device for withdrawing blood for diagnostic purposes comprising
a lancet (34) comprising a metal needle (166, 176) with a tip (35) and a plastic body (165), a lancet holder (6) for holding the lancet (34), a lancet drive means (3) for driving the lancet needle (166, 176) along a predetermined straight path, the driving means comprising a driver input member rotatable about an axis parallel to the straight path, a driver output member connected to the lancet and the driver input member for converting the rotation of the driver input into longitudinal movement of the lancet along said straight path, and means for accurately positioning the metal needle (166, 176) of the lancet (34) relative to the driving means, thereby accurately to control the puncture depth of the tip (35), the positioning means comprising a positioning means surface (169) on the needle (166, 176), a stop (170) on the lancet holder (6) for abutting the positioning means surface (169), and elastic means for pressing the positioning means surface (169) against the stop (170).
Specification