Injection device

A - Human Necessities – 61 – M

Patent

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Details

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

Patent

CA 2568655

An injection device (110) is described having a housing (112) that receives a syringe (114) having a needle (118), wherein the syringe is supported in a syringe carrier (150). The syringe and syringe carrier are biased by a return spring (126) from an extended position in which the needle (118) extends from the housing (112) through an exit aperture (128) to a retracted position in which it does not. A drive spring (130) acts via a drive to advance the syringe from its retracted position to its extended position and discharge its contents through the needle and a return spring, brought into play when the drive has reached a nominal return position, restores the syringe to its retracted position.

L'invention concerne un dispositif d'injection (110) comprenant un logement (112) destiné à recevoir une seringue (114) pourvue d'une aiguille (118), ladite seringue étant portée par un support de seringue (150). La seringue et le support sont sollicités par un ressort de rappel (126) qui fait passer l'aiguille (118) d'une position étendue dans laquelle elle traverse, en partant du logement (112), une ouverture de sortie (128) à une position rétractée dans laquelle l'aiguille est rentrée. Un ressort d'entraînement (130) agit via une commande afin de faire passer la seringue de sa position rétractée à sa position étendue et de décharger son contenu par l'intermédiaire de l'aiguille, et un ressort de rappel mis en jeu lorsque la commande a atteint une position de rappel nominal ramène la seringue à sa position rétractée.

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