Blood withdrawal system

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/15 (2006.01)

Patent

CA 2475705

Blood withdrawal system for withdrawing blood for diagnostic purposes, comprising a housing with a lancet, which can be moved within the housing, and a lancet drive with a drive spring and a cocking mechanism, wherein the cocking mechanism (13) includes an actuation element (14), which is coupled through an input-side coupling mechanism (29) to the drive spring (16) such that the drive spring (16) is tensioned during a cocking phase of the motion of the lancet drive (9) by moving the actuation element (14). The actuation element of the cocking mechanism is coupled to a track control mechanism comprising as components of the track control mechanism a control track part (45) and a control traveller (46), wherein the control traveller (46) performs a relative motion with respect to the control track part (45) during at least a part of the cocking phase, in which motion it travels along the control track (47) of the control track part (45), whereby at least a part of the motion of the lancet drive is controlled.

L'invention porte sur un système permettant de prélever du sang à des fins diagnostiques. Le système comprend un boîtier muni d'une lancette, qui peut se déplacer dans le boîtier, et un mécanisme d'entraînement de la lancette muni d'un ressort et d'un mécanisme d'armement. Le mécanisme d'armement (13) comprend un élément déclencheur (14), qui est couplé par l'entremise d'un mécanisme de couplage(29) au ressort du côté de l'entrée (16), de sorte que le ressort (16) est tendu pendant l'armement du mécanisme d'entraînement (9) après le déplacement de l'élément déclencheur (14). L'élément déclencheur du mécanisme d'armement est couplé à un mécanisme de guidage comprenant une partie guide (45) et un élément coulissant (46). L'élément coulissant (46) se déplace par rapport à la partie guide (45) pendant au moins une partie de la phase d'armement. Ce déplacement se fait le long du guide (47) de la partie guide (45), et commande au moins partiellement le déplacement du mécanisme d'entraînement.

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