LANCET DEVICE
First Claim
Patent Images
1. A lancet device for generating a piercing wound in a skin surface to obtain body fluid, comprising:
- a lancet guide configured to hold a lancet;
a lancet drive for generating a drive force to move the lancet guide along a piercing path in a piercing direction;
a retention mechanism for generating a magnetic retention force for retaining the lancet guide in a tensioned position;
a trigger, actuation of which reduces the retention force and thereby allows the drive force to accelerate the lancet guide in the piercing direction; and
a control unit which controls the reduction in retention force and thereby regulates piercing depth.
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Accused Products
Abstract
The present invention relates to lancet device by which a lancet is displaceable along a piercing path to generate a piercing wound in a skin surface, in particular to obtain body fluid for diagnostic purposes. To achieve performance of a piercing movement which is low in noise and shock, the lancet drive may include a control unit for regulating the piercing depth of the lancet and the lancet may be implemented to oscillate freely out in the piercing direction without delimitation by a mechanical piercing depth stop.
123 Citations
26 Claims
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1. A lancet device for generating a piercing wound in a skin surface to obtain body fluid, comprising:
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a lancet guide configured to hold a lancet; a lancet drive for generating a drive force to move the lancet guide along a piercing path in a piercing direction; a retention mechanism for generating a magnetic retention force for retaining the lancet guide in a tensioned position; a trigger, actuation of which reduces the retention force and thereby allows the drive force to accelerate the lancet guide in the piercing direction; and a control unit which controls the reduction in retention force and thereby regulates piercing depth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating a lancet device having a lancet guide that holds a lancet and a lancet drive for generating a drive force to move the lancet guide along a piercing path in a piercing direction, the method comprising:
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positioning the lancet drive in a tensioned position; retaining the lancet drive in the tensioned position with a magnetic force; selecting a desired piercing depth; and selectively varying the magnetic force to release the lancet drive from the tensioned position and to cause the lancet to advance to and reverse direction at the desired piercing depth. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A lancet device for generating a piercing wound in a skin surface, comprising:
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a lancet guide configured to hold a lancet; a lancet drive for generating a drive force to move the lancet guide along a piercing path in a piercing direction; a magnet associated with the lancet drive; an electromagnet releasably coupled to the magnet when the lancet drive is in a tensioned position; and a control unit operably connected to the electromagnet, the control unit selectively varying a magnetic force between the electromagnet and the magnet as a function of desired piercing depth, wherein the lancet guide advances freely in the piercing direction up to an oscillation reversal point. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification