| 主权项 |
1. An auto-injector for administering a dose of a liquid medicament (M), comprising
an elongate tubular housing arranged to contain a syringe with a hollow needle and a stopper for sealing the syringe and displacing the medicament (M), the housing having a distal end (D) and a proximal end (P) with an orifice intended to be applied against an injection site, wherein the syringe is slidably arranged with respect to the housing, a single drive spring configured when activated to
push the needle from a covered position inside the housing into an advanced position through the orifice and past the proximal end (P), andto operate the syringe to supply the dose of medicament (M); and a trigger assembly arranged to lock the drive spring in a compressed state prior to manual operation and capable of, upon manual operation, releasing the drive spring for injection, wherein the elongate tubular housing has a midpoint and comprises two tubular portions connected by a hinge positioned adjacent the midpoint, the tubular portions rotatable about the hinge relative to each other between an aligned position and a maximum opening angle, wherein the drive spring is compressed by rotating the tubular portions out of the aligned position towards the maximum opening angle, wherein the trigger assembly locks the drive spring in the compressed state when the tubular portions are rotated at least almost to the maximum opening angle and wherein a loading bay for holding the syringe is arranged in one of the tubular portions, the loading bay being accessible from its distal end for loading or unloading the syringe when the tubular portions are rotated out of the aligned position, wherein a lever is position outside of the elongate tubular housing and is attached with one end to a fixed first pivot on an outside surface of one tubular portion, wherein the other end of the lever is attached to a second pivot arranged at a sliding shuttle in the other tubular portion, the sliding shuttle translatable in longitudinal direction of the other tubular portion between a maximum proximal position when the tubular portions are aligned prior to activation of the trigger assembly and a maximum distal position when the tubular portions are rotated at least almost by the maximum opening angle, wherein a drive collar arranged at a proximal end of the drive spring is engageable by the sliding shuttle in order to compress the drive spring, characterized in that the one tubular portion is a proximal portion and the other tubular portion is a distal portion, wherein the drive spring is a single drive spring used for providing axial motion for advancing the syringe and injecting a dose of medicament (M). |
