Lancet device for generating a puncture wound, and lancet drive assembly
First Claim
1. A lancet device for generating a puncture wound in a skin surface, in particular for withdrawing a body liquid for diagnostic purposes, comprising:
- a housing in which a lancet can move along a puncturing path;
a lancet drive having a drive rotor that is driven by a drive spring;
a lancet coupling mechanism that transforms a rotational motion of the drive rotor into a puncturing and return motion of the lancet along the puncturing path during a working cycle of the lancet drive, the lancet coupling mechanism comprising a steering curve traveler which travels along a steering curve of the lancet coupling mechanism;
a reference element that is moveable relative to the lancet and relative to the housing, the reference element comprising a contact surface adapted to contact a skin surface, wherein, at the time of puncturing, the contact surface rests against the skin surface and is located in a defined position relative to the lancet drive, whereby a puncture wound with a reproducible puncturing depth is generated by the puncturing motion; and
a reference element coupling mechanism that is coupled to the lancet drive for moving the reference element, the reference element coupling mechanism comprising a steering curve and a steering curve traveler which travels along the steering curve.
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Accused Products
Abstract
A lancet device for generating a puncture wound in a skin surface, comprising a housing, in which a lancet can be moved on a puncturing path, a lancet drive with a drive rotor that can be driven by a drive spring, a lancet coupling mechanism that transforms a rotational motion of the drive rotor into a puncturing and returning motion of the lancet during a working cycle of the lancet drive, a reference element that is mobile relative to the lancet and relative to the housing and is fixed in a defined position relative to the lancet drive during the puncturing and rests against the surface of the skin with a contact surface thereof such that a puncture wound with a reproducible puncturing depth is generated by the puncturing motion, and a reference element coupling mechanism that is coupled to the lancet drive in order to move the reference element. The invention further relates to a suitable lancet drive assembly for a lancet device of this type.
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Citations
42 Claims
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1. A lancet device for generating a puncture wound in a skin surface, in particular for withdrawing a body liquid for diagnostic purposes, comprising:
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a housing in which a lancet can move along a puncturing path;
a lancet drive having a drive rotor that is driven by a drive spring;
a lancet coupling mechanism that transforms a rotational motion of the drive rotor into a puncturing and return motion of the lancet along the puncturing path during a working cycle of the lancet drive, the lancet coupling mechanism comprising a steering curve traveler which travels along a steering curve of the lancet coupling mechanism;
a reference element that is moveable relative to the lancet and relative to the housing, the reference element comprising a contact surface adapted to contact a skin surface, wherein, at the time of puncturing, the contact surface rests against the skin surface and is located in a defined position relative to the lancet drive, whereby a puncture wound with a reproducible puncturing depth is generated by the puncturing motion; and
a reference element coupling mechanism that is coupled to the lancet drive for moving the reference element, the reference element coupling mechanism comprising a steering curve and a steering curve traveler which travels along the steering curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A lancet drive assembly for use with a lancing device, the lancet drive assembly comprising:
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a lancet drive having a drive rotor driven by a drive spring and a tensioning rotor for tensioning the drive spring;
a lancet coupling mechanism having a steering curve along which a steering curve traveler travels to transform rotational motion of the drive rotor into a puncturing and return motion of a lancet that is coupled to the lancet drive; and
a second coupling mechanism coupled to the lancet drive and comprising a second steering curve along which a second steering curve traveler travels. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A lancing device, comprising:
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a housing;
a lancet drive disposed in the housing and including a drive rotor driven by a drive spring;
a first coupling mechanism disposed in the housing and including a lancet connecting arm configured to connect to a lancet, the first coupling mechanism transforming motion of the drive rotor into reciprocating motion of the lancet connecting arm;
a reference element that is moveable relative to the housing and relative to the lancet connecting arm, the reference element having a contact surface adapted to contact skin to be punctured during the reciprocating motion of the lancet connecting arm; and
a second coupling mechanism which couples the reference element to the lancet drive, wherein movement of the lancet drive is transformed into movement of the reference element. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification