A method of assembling a drug delivery device, comprising the steps of: inserting a piston rod in a nut portion of a cartridge assembly and rotating the piston rod until the piston rod distal end engages the cartridge piston, mounting a drive member on the piston rod in a rota-tional position being closest to a pre-determined rotational position, and rotating the drive member to the pre-determined rotational position.

A medicament delivery device for a mixing process to create a therapeutic substance for delivery within a multi-chambered cartridge, the delivery device includes a distal part with a dose setting mechanism having a housing, a dose setting knob, an injection button, a piston rod capable of moving axially along the longitudinal axis of the housing during dose delivery, and a return ring configured to reset the piston rod to a starting position. The delivery device also includes a proximal part including a cartridge holder configured to accept a multi-chambered cartridge, the cartridge holder including a screw driven sleeve configured for attachment to the distal part and rotation of the screw driven sleeve performing a medicament mixing process within the multi-chambered cartridge.

A drug injection device includes a housing with a cartridge having a predetermined drug volume, a dose setting mechanism for setting a drug dose, and a dose delivery mechanism. A dose setting service element rotates about a longitudinal axis during the drug dose setting. The dose setting mechanism has a last dose setting device to prevent setting of a drug dose greater than the drug volume remaining in the cartridge. The last dose setting device includes a pinion coaxial with the longitudinal axis that rotates about the longitudinal axis with the dose setting service element during drug dose setting, and a rack engaged with the pinion that moves parallel to the longitudinal axis when the pinion rotates. The pinion and the rack have mutual abutment elements that prevent further rotation of the pinion after the rack has travelled an axial length correlated to the predetermined drug volume.

Systems, devices, and techniques are disclosed for administering and tracking medicine to patients and providing health management capabilities for patients and caregivers. In some aspects, a system includes an injection pen device in communication with a mobile communication device having a software application to determine a recommended dose based on prior dose data, analyte data, and nutrient data and to generate a report illustrative of a relationship between the medicine data, the health data, and the contextual data.

The present disclosure relates to a medication delivery device having a dose detection system and an associated control system configured to determine an amount of medication delivered from the medication delivery device based on the sensing of relative rotation within the medication delivery device. The relative rotation may occur between a dose setting member and an actuator and/or housing of the medication delivery device. The rotation sensing may involve piezoelectric sensing, more specifically repeatedly deforming a piezoelectric sensor with a mechanical force. The dose detection system may be a modular or integral component of the medication delivery device.

A drug delivery device comprising: a housing; a cylindrical member rotatably supported within the housing; and a plurality of sensors; wherein: the outer surface of the cylindrical member is provided with a single track, the track forming an encoder and having a plurality of first track segments and a plurality of second track segments arranged along the length of the track which are respectively capable of inducing first and second responses in the sensors; and in each rotational position of the cylindrical member relative to the housing at least one different first track segment is capable of inducing a first response in at least one said sensor, thereby enabling the rotational position of the cylindrical member relative to the housing to be determined.

A dose setting mechanism for a medicament delivery device, which dose setting mechanism comprises, a tubular member 10 having a longitudinal track 18 of a predetermined length; a dose drum 40, coaxial with the tubular member 10, and being axially and rotationally movable relative to the tubular member 10; a stop member 90, axially movable but rotationally locked relative to the tubular member 10, and further being in an axially slaved connection with the dose drum 40; wherein said stop member 90 comprises a track follower 98 in engagement with the longitudinal track 18, such that rotational movement of the dose drum 40 relative to the tubular member 10 may cause a maximum axial displacement of said dose drum 40 and said stop member 90, relative to the tubular member 10, corresponding to said predetermined length.

The disclosure relates to a drug delivery device for expelling a pre-determined or pre-settable amount of a liquid medicament formulation which improves the stalling behavior and indicates the stalling state to the user. The device comprises: a medicament reservoir attached to a housing and an expelling mechanism configured for acting against the medicament reservoir in order to expel a portion of the liquid medicament formulation therefrom, the expelling mechanism comprising an arrangement of a threaded nut in a fixed axial relation to the housing and a lead screw in threaded engagement with the threaded nut, the threaded nut and the lead screw being rotatable relative to each other by a rotational input interface, a mechanical energy reservoir (for storing energy, the stored energy being releasable from the energy reservoir by a rotational interface, a drive train having upstream and downstream interfaces; and a trigger movable relative to the housing.

A dosage sensing module for or in a pen drug delivery device and comprising a power source unit, a processor unit and a dosage sensor unit with a first sensor part adapted to be fixed to a part not rotating during dose expelling and comprising a flexible printed circuit board sheet on which a pattern of individual electrical conductive sensor areas are arranged. The sensor unit further comprises a second sensor part adapted to be fixed to the piston rod to follow the rotation thereof during dose expelling. The second sensor part comprises individual structures that together with the conductive sensor areas are adapted to, upon relative rotational movement between the first and second sensor part, provide electrical signals to a processor unit indicative of the relative rotational position between the first and second sensor part.

The present disclosure refers to a switch assembly for an electronic system of a drug delivery device. The switch assembly includes a chassis supporting a PCBA including at least a first electrical contact, a second electrical contact, a third electrical contact and a fourth electrical contact and a ring with a ratchet profile. The chassis moves axially relative to the ring from a first axial position to a second axial position during a first switch operation mode. The chassis and the ring are configured such that the ring rotates relative to the chassis during a second switch operation mode. The first electrical contact and the second electrical contact are arranged such that upon axial movement of the chassis towards the ring during the first switch operation mode, an electrical connection between the first electrical contact and the second electrical contact is closed.