Releasable coupling and injection device

Details Releasable coupling and injection device Releasable coupling and injection device

A - Human Necessities

61

M

A61M 5/20 (2006.01) A61M 5/32 (2006.01)

Patent

CA 2568647

A housing (212) receives a syringe and includes a return spring (226) for biasing the syringe from an extended position in which its needle (218) extends from the housing to a retracted position in which it does not. A drive spring (230) acts on a first drive element (232) and a second drive element (234) acts upon the syringe to advance it from its retracted position to its extended position and discharge its contents through the needle. The first drive element is capable of movement relative to the second once a nominal coupling position has been reached. A release mechanism is activated when the first drive element (234) is further advanced to a nominal release position, to release the syringe (214) from the action of the drive spring, whereupon the return spring restores the syringe to its retracted position.

L'invention concerne un logement (212) recevant une seringue et comprenant un ressort de rappel (226) destiné à orienter la seringue d'une position dépliée, dans laquelle son aiguille (218) s'étend à partir du logement, dans une position rétractée, dans laquelle l'aiguille est à l'intérieur. Un ressort de commande (230) agit sur un premier élément de commande (232) et un second élément de commande (234) agit sur la seringue, de manière à la faire avancer de sa position rétractée dans sa position dépliée et à décharger son contenu à travers l'aiguille. Le premier élément de commande peut se déplacer par rapport au second élément, une fois que la position de couplage nominale a été atteinte. Un mécanisme de libération est activé, lorsque le premier élément de commande est avancé en position de libération nominale, ceci permettant de libérer la seringue (214) de l'action du ressort de commande, le ressort de rappel replaçant alors la seringue dans sa position rétractée.

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