A system for a drug delivery device is provided. The system includes: a housing and a cartridge unit that is attachable to the housing or releasably attached to the housing. The cartridge unit includes a cartridge unit guide feature, the cartridge unit guide feature being provided to establish a guiding interface with the housing in order to guide relative movement of the cartridge unit and the housing with respect to one another when attaching the cartridge unit to the housing. The cartridge unit includes a cartridge unit interface feature, the cartridge unit interface feature being provided to form a further interface, in addition to the guiding interface, with the housing of the further interface being established when the cartridge unit is attached to the housing. The guiding interface is a bayonet-type interface which defines at least two different stages of movement between the cartridge unit and the housing when the cartridge unit is attached to the housing, a first stage with at least axial movement by a first stage axial distance in a first stage axial direction and a second stage with at least rotational movement by a second stage angle in a second stage rotational direction. The further interface is or includes a ramp interface.

The device relates to medical technology, and more particularly to devices for intramuscular and subcutaneous injection. The present automatic injector for medical syringes consists of a housing, a holder for a syringe, a piston follower, a syringe lifting mechanism, a firing button, a lifting spring, a spring for inserting the needle, a spring for expressing the injectable fluid, a safety lock and a mechanical dynamic brake member in the form of a damping mechanism. The technical result is that of increasing the operating efficiency of the device and of reducing sensations of pain from rapid drug delivery during an injection.

An injection device comprises an actuator adapted when actuated to cause commencement of an injection sequence; a locking mechanism adapted to be moved between a locked position in which the locking mechanism prevents the actuator from being actuated, and an unlocked position in which the actuator can be actuated to cause commencement of the injection sequence. An indicator is configured to provide a visual indication of whether the locking mechanism is in its locked position or in its unlocked position.

A cartridge assembly for a drug delivery device is described. The cartridge assembly includes a cartridge containing a drug, the cartridge including a dispensing end; a cartridge holder, the cartridge holder defining an interior cartridge holding section, where the cartridge is arranged within the cartridge holding section; and a fixing feature. The fixing feature includes a fixing surface, in particular a radially oriented surface, which is arranged to abut a cartridge surface of the cartridge, in particular a radially oriented surface, to prevent removal of the cartridge from the cartridge holder such that the cartridge is permanently secured in the cartridge holder. The cartridge surface is a proximal surface which faces away from the dispensing end of the cartridge, wherein the cartridge surface is arranged between the dispensing end of the cartridge and the end opposite of the dispensing end, and wherein the fixing feature is integrated into the cartridge holder.

A cartridge assembly for a drug delivery device is described. The cartridge assembly includes (i) a cartridge containing a drug, the cartridge including a dispensing end; (ii) a cartridge holder, the cartridge holder defining an interior cartridge holding section, in which the cartridge is arranged within the cartridge holding section; and (iii) a fixing member.

The fixing member includes a fixing surface, in particular a radially oriented surface, which is arranged to abut a cartridge surface of the cartridge, in particular a radially oriented surface. The cartridge surface is a proximal surface which faces away from the dispensing end of the cartridge, and the cartridge surface is arranged between the dispensing end of the cartridge and the end opposite of the dispensing end.

The fixing member includes a securing surface which is arranged to abut a holder surface of the cartridge holder to prevent removal of the cartridge from the cartridge holder such that the cartridge is permanently secured in the cartridge holder, and the holder surface is a distal surface of the cartridge holder. Further, a drug delivery device and a method for assembling the cartridge assembly are described.

A medicament dispensing mechanism is disclosed that is configured to eject successive doses of the medicament from a medicament chamber. An embodiment of the dispensing mechanism includes a housing and a plunger rod configured for ejecting the doses of medicament from the chamber. The dispensing mechanism further includes an actuation mechanism that comprises a trigger associated with the housing and having a ready and a fired position with respect thereto. The trigger is configured for manipulation by a user for successive movement in a generally axial dosing motion from the ready position to the fired position in which the trigger is associated with the plunger rod to cause the plunger rod to eject one of the doses of a predetermined volume and a resetting motion from the fired position to the ready position that comprises axial rotation, wherein the trigger is uncoupled from the plunger rod during the resetting motion.

A cartridge (100) for packaging a medicament and being suitable for use with multiple different types of dosing device is described, together with dosing devices and adaptors for dosing devices. The cartridge includes a generally tubular body (102) having an interior cavity (104), a closure member (106) disposed at a distal end of the body and comprising a sealing element (128), a piston member (108) disposed in the cavity to contain the medicament between the piston member and the sealing element (128), a coupling element (114) disposed at the distal end of the body for coupling the cartridge to a dosing device (200) or to an adaptor for a dosing device, and a seal arrangement (126, 129) for receiving a sealing element release member (214) of the dosing device or adaptor. The coupling element (114) is arranged for engagement with an engagement part (220) of the dosing device or adaptor to clip the cartridge (100) to the dosing device or adaptor (200) upon insertion of the cartridge to the dosing device or adaptor, and the seal arrangement (126, 129) is disposed distally with respect to the sealing element (128) and is arranged to form a seal around the release member (214; 254) when the cartridge is coupled to the dosing device or adaptor.

A drive mechanism for a medicament delivery device is disclosed having a housing with a proximal end and a distal end, a container carrier arranged within the housing and being axially movable in relation to the housing, and a drive assembly partially arranged within the housing and being axially movable in relation to the housing. The drive assembly has a proximally extended rack arm, a cogwheel arranged within the housing and being rotatable but axially fixed in relation to the housing, wherein the cogwheel is selectively coupled to the rack arm through a tangential engagement with a first set of rack teeth or a second set of rack teeth which are arranged on the rack arm and wherein the first set of rack teeth or the second set of rack teeth forces the cogwheel to rotate when the drive assembly is axially moved towards the proximal end in relation to the housing. The cogwheel further has a connecting member configured to connect to a counter connecting member which is arranged on the container carrier; such that a rotational movement of the cogwheel is converted into a linear movement of the container carrier.

A plunger assembly (200) for use in a syringe apparatus (100). The plunger assembly (200) includes a movable tip (280) that can be removably secured to a plunger rod (210). By positioning the movable tip (280) in a barrel (300) while air (70) can still pass through a hole (282) in the movable tip (280), a user (90) can use the plunger assembly (200) to easily remove air (70) from a syringe apparatus (100) that has been loaded with the desired liquid (80).

A kit for the direct use of a variety of medical ampoules of differing sizes, with a syringe, the kit having: a syringe body; a syringe plunger having a hollow interior volume; and a plurality of ampoule interface elements, each one being interchangeably received within the hollow interior volume and configured for deployment between an outer surface of the medical ampoule and a surface of the hollow interior volume so as to hold the medical ampoule therein, each of the plurality of ampoule interface elements having an outside diameter sized to fit an inside diameter of the hollow interior volume, wherein a first of the ampoule interface elements has an inside diameter for receiving a medical ampoule of a first size, and a second of the ampoule interface elements has an inside diameter different from the first inside diameter for receiving a medical ampoule of a second size.