Auto-Injector With A System For Delaying The Device Indicating The Removal Of The Auto-Injector

Abstract

An auto-injector comprising: - a body (1) receiving a reservoir (S), said reservoir (S) containing fluid product and comprising a piston (P), in the same way as a pre-filled syringe, - a piston rod (5) suitable for cooperating with the piston (P) of said reservoir (S), said piston rod (5) being movable between a loaded position and an injection position in which said piston rod (5) has moved the piston (P) of the reservoir (S) in order to inject the fluid product into an injection site, - a visual, audio and / or tactile indicator device, for indicating to the user that he can remove said auto-injector from said injection site, said auto-injector comprising a delay system for delaying the actuation of said visual, audio and / or tactile indicator device relative to the end of the injection, said delay system comprising a reservoir (16), a shear member (19) disposed in said reservoir (16) and a fluid disposed in said reservoir (16) around said shear member (19), one of said reservoir (16) and said shear member (19) being mounted rotating in said body (1) and the other of said reservoir (16) and said shear member (19) being fixed in rotation, the rotation of one relative to the other being braked by the shearing of said fluid contained in said reservoir (16), said reservoir (16) comprising projections (165) on the inner surface of same and said shear member (19) comprising projections (195) on the outer surface of same, said projections (165, 195) generating restrictions to the flow of the fluid.

Description

technical field [0001] The present invention relates to an automatic injector. Background technique [0002] Autoinjectors are well known in the art. These devices are primarily used to automatically inject the contents of a syringe into a patient. Various systems exist for automatically piercing a needle into a patient and infusing a fluid contained in a syringe. Autoinjectors are relatively complex devices that must accommodate many constraints that increase safety and reliability. The robustness of the device, its ease of handling and its ease of use for the user are also important factors. In addition, most of these auto-injectors are disposable, and the production cost and assembly cost should also be considered factors. [0003] There are many auto-injectors on the market, however, which have a number of drawbacks. [0004] Therefore, especially when the fluid volume is large, and / or when the injected fluid is thick, it is desirable to be able to disperse the flui...

AI Technical Summary

Problems solved by technology

Therefore, it is not safe, reliable or desirable as the system is user dependent and in some cases the user may be disturbed or overwhelmed by the injection he or she is performing

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