Device for withdrawing blood for diagnostic applications
First Claim
1. Blood lancet device for withdrawing blood for diagnostic purposes comprisingan elongated housing, the front end of which having an exit opening for the tip of a lancet, a lancet holder for holding the lancet, the lancet holder being movable in the housing in the direction of its main axis along a predetermined puncturing path, a lancet guide for guiding the lancet holder along the predetermined puncturing path and a lancet drive having an elastic drive spring which can be locked by a locking device in the loaded state of the drive spring, the lancet drive converting after triggering of the locking device the tension release movement of the drive spring into a puncturing motion to move the lancet, held in the lancet holder, at high speed along the predetermined puncturing path in the puncturing direction until its tip emerges from the exit opening to produce a wound in a body part adjacent the exit opening, wherein a double sided rotay/translatory transmission is provided in the housing, a) the input side of the rotary/translatory transmission converting the motion of a loading button, which projects out of the housing at its rear end and moves along a linear loading path, into a rotational motion of a lancet drive rotor, the lancet drive rotor being rotated about a rotational axis running parallel to the axis of the device to load the lancet drive rotor by tensioning the drive spring and b) the output side of the rotary/translatory transmission converting after triggering of the lancet drive a rotational motion of the lancet drive rotor driven by the drive spring into the puncturing motion in the direction of the main axis.
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Accused Products
Abstract
Device for withdrawing Blood for Diagnostic Purposes. A lancet holder (8) for holding a lancet (7) and a lancet drive (12) having a loadable elastic drive spring (15) are provided within an elongated housing (2). The relaxing motion of the drive spring (15) is converted into a puncturing motion, after release of a locking device, to move the lancet (7), held by the lancet holder (8), at high speed in the puncturing direction until its tip exists out of an exit opening (5) of the housing (2).
An improved handling and simultaneous minimization of pain is achieved by providing a two-sided rotary/translatory transmission (25) in the housing (2), wherein
a) the input side (24) of the rotary/translatory transmission (25) transforms the motion of a loading button (17), protruding out of the rear end (16) of the housing. (2), along a linear loading path (23) into a rotational motion of a lancet drive rotor (13) which rotates about a rotational axis extending parallel to the axis of the device (A) to load the lancet drive rotor (13) by tensioning the drive spring (15);
b) when the lancet drive is triggered, the output side (26) of the rotary/translatory transmission (25) converts a rotational motion of the lancet drive rotor, driven by the drive spring, into the puncturing motion in the direction along the main axis.
282 Citations
14 Claims
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1. Blood lancet device for withdrawing blood for diagnostic purposes comprising
an elongated housing, the front end of which having an exit opening for the tip of a lancet, a lancet holder for holding the lancet, the lancet holder being movable in the housing in the direction of its main axis along a predetermined puncturing path, a lancet guide for guiding the lancet holder along the predetermined puncturing path and a lancet drive having an elastic drive spring which can be locked by a locking device in the loaded state of the drive spring, the lancet drive converting after triggering of the locking device the tension release movement of the drive spring into a puncturing motion to move the lancet, held in the lancet holder, at high speed along the predetermined puncturing path in the puncturing direction until its tip emerges from the exit opening to produce a wound in a body part adjacent the exit opening, wherein a double sided rotay/translatory transmission is provided in the housing, a) the input side of the rotary/translatory transmission converting the motion of a loading button, which projects out of the housing at its rear end and moves along a linear loading path, into a rotational motion of a lancet drive rotor, the lancet drive rotor being rotated about a rotational axis running parallel to the axis of the device to load the lancet drive rotor by tensioning the drive spring and b) the output side of the rotary/translatory transmission converting after triggering of the lancet drive a rotational motion of the lancet drive rotor driven by the drive spring into the puncturing motion in the direction of the main axis.
Specification