EP2399635A1 — Auto-injector

USPTO Abstract

The invention refers to an auto-injector (1), comprising: - an elongate housing (2) arranged to contain a syringe (3), wherein the syringe (3) is slidably arranged with respect to the housing (2), - spring means (8) capable of, upon activation: - pushing the needle (4) from a covered position inside the housing (2) into an advanced position through the orifice and past the proximal end (P), - operating the syringe (3) to supply the dose of medicament (M), and - retracting the syringe (3) with the needle (4) into the covered position after delivering the medicament (M), - activating means (20) arranged to lock the spring means (8) in a pressurized state prior to manual operation and capable of, upon manual operation, releasing the spring means (8) for injection, wherein the spring means (8) is a single drive spring (8) in the shape of a compression spring. The activating means (20) is arranged as a trigger button (20) laterally arranged on the housing (2).