drug delivery device

Abstract

The present invention generally relates to a drug delivery device for selecting and dispensing multiple doses of a medicament. The drug delivery device comprises: a medicament reservoir attached to a housing (10; 10'; 10'); a drive mechanism (30, 40) comprising a plunger (30; 30'), the plunger (30; 30') axially movable relative to the housing (10; 10'; 10') to dispense a dose of medicament from the medicament reservoir; a dose selection element (60, 80; 60') which is releasably coupled to the drive mechanism and Rotatable relative to the housing (10; 10'; 10') in a first direction for dose selection; trigger (70; 70') axially movable relative to the housing (10; 10'; 10') To start dispensing the dose selected by the dose selection element (60, 80; 60'); and a limiter (100; 100'; 100"; 100') which selectively allows and prevents the trigger according to the amount of the selected dose Axial movement of (70; 70'). Restrictor (100; 100'; 100"; 100') is rotationally constrained to dose selection element (60, 80; 60') and axially constrained to trigger (70 ; 70'). The limiter (100; 100'; 100"; 100') and one of the parts (110; 10') axially coupled to the housing (10; 10'; 10') includes a track, the track and the limiter (100; 100'; 100"; 100') engage with a blocking feature (112; 112'; 112') of another of the parts axially coupled to the housing (10; 10'; 10'). The track includes at least one narrow portion that restricts relative axial movement between the track and the blocking feature (112; 112'; 112') and at least one wide portion that allows the track and the blocking feature (112; 112'; 112 ') relative axial movement between.

Description

technical field [0001] The present invention generally relates to a drug delivery device for selecting and dispensing a plurality of user variable doses of a medicament. Background technique [0002] Pen-type drug delivery devices have application for periodic injections by humans without formal medical training. This may be increasingly common among patients with diabetes, where self-treatment enables these patients to effectively manage their disease. In practice, such drug delivery devices allow the user to individually select and dispense multiple doses of the medicament. [0003] There are basically two types of drug delivery devices: resettable devices (ie, reusable) and non-resettable (ie, disposable). For example, disposable pen delivery devices are available as stand-alone devices. This self-contained unit does not have a removable pre-filled cartridge. In contrast, the pre-filled cartridges may not be removed and replaced from these devices without destroying t...

AI Technical Summary

Problems solved by technology

This self-contained unit does not have a removable pre-filled cartridge

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