Auto-injector

A - Human Necessities – 61 – M

Patent

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Details

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

Patent

CA 2431774

The present invention relates to a device for auto-injection of a dose of medicament, comprising a housing (10) arranged to contain a medicament container (24) therein and comprising a contact part (18, 20) intended to be applied against an injection site, a needle cover (18, 20) surrounding a needle arranged to the medicament container and extending at least the length of the needle, spring means (76, 82) capable of, upon activation, pushing the needle past the end (20) of the needle cover as well as operating said medicament container to supply the dose of medicament, first locking means (46, 58, 62, 78) capable of locking said spring means in a pressurised state, first activating means (54, 58) capable of, upon manual operation, releasing said spring means for injection. The invention is characterised by a second locking means (56, 68, 70) capable of locking said first activating means and a second activating means (16, 18, 46), capable of releasing said second locking means when said contact part is exposed to pressure.

L'invention concerne un dispositif pour l'injection automatique d'une dose de médicament. Ce dispositif comprend un logement (10) conçu pour contenir un contenant de médicament (24) et comprenant une partie de contact (18, 20) destinée à être appliquée contre un point d'injection, un étui protecteur d'aiguille (18, 20) entourant une aiguille, placé vers le contenant de médicament et s'étendant au moins sur la longueur de l'aiguille, des ressorts (76, 82) pouvant, lorsqu'ils sont actionnés, pousser l'aiguille au-delà de l'extrémité (20) de l'étui protecteur d'aiguille ainsi qu'actionner ledit contenant de médicament pour administrer la dose de médicament, des premiers moyens de blocage (46, 58, 62, 78) pouvant bloquer lesdits ressorts dans un état sous pression, les premiers moyens d'activation (54, 58) pouvant, par une opération manuelle, libérer ledit moyen de ressort pour l'injection. L'invention est caractérisée par des seconds moyens de blocage (56, 68, 70) pouvant bloquer lesdits premiers moyens d'activation et des seconds moyens d'activation (16, 18, 46), pouvant libérer lesdits seconds moyens de blocage lorsque la partie de contact est soumise à pression.

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