An electronic system for a drug delivery device is provided. The system includes an electronic control unit configured to control an operation of the system, and an electrical motion sensing unit that is configured to generate one or more data signals. The data signals are suitable to quantify relative rotational movement between a first member and a second member during a dose setting operation for setting a dose to be delivered by the drug delivery device and/or a dose delivery operation for delivering the set dose. The system is configured to perform a comparison operation to compare first data to second data. The first data indicating a first relative angular position of the first member and the second member, and being derivable from one or more data signals. The second data indicating a second relative angular position of the first member and the second member.

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.

The present disclosure relates to a dose detection system for use with a medication delivery device in which a dose setting member rotates relative to an actuator during dose delivery. The dose detection system comprises a module including a rotation sensor attached to the actuator during dose delivery. A sensed element is attached to the dose setting member and includes first gear teeth. The rotation sensor comprises a driven gear including second gear teeth. The second gear teeth are operatively received by the first gear teeth and are driven in rotation as the first gear teeth rotate during dose delivery. The rotation sensor is responsive to the rotation of the second gear teeth to detect the rotation of the dose setting member.

The invention relates to a spring driven multi-use fixed dose injection device with an End-of-Content (EoC) mechanism. A housing structure contains a volume of a liquid drug which is expelled in a predefined number of substantially equally sized dose volumes. Each dose volume is expelled automatically with the assistance of a spring which is loaded with a force sufficient to expel the full number of the predefined plurality of predetermined and equally sized dose volumes. Each dose volume is prepared and released by moving a drive element a predetermined axial distance in the proximal direction away from an initial position, followed by a rotation of the drive element by the force of the spring back to the initial position during which rotation the drive element rotates the piston rod to move helically. The End-of-Content mechanism determines how many times the drive element can be moved proximally and comprises a longitudinal track structure associated with the piston rod which has a free length defined by a proximal stop associated with the piston rod which stop prevents the drive element from moving an additional predetermined axial distance in the proximal direction required to prepare a subsequent predetermined dose volume after the predefined plurality of predetermined and equally sized dose volumes have been selected.

A drug delivery device (100, 200) for delivering a fixed dose, wherein the drug delivery device comprises: a housing assembly, a drug reservoir with a piston and a drive mechanism. The drive mechanism comprises a piston rod (109, 209) for advancing the piston to expel a drug, and a drive tube (180, 280), wherein the drive mechanism is adapted to deliver the predefined fixed dose in response to activation. The drug delivery device further comprises an activation mechanism for activating the drive mechanism, in response to moving the drive tube in an axial direction. The housing assembly comprises a guide structure for guiding the drive tube during activation and delivery of a dose, wherein the guide structure comprises an axial portion (156, 256) providing a sliding surface for guiding the drive tube during activation, and for providing a rotational stop defining an end of dose, and a helical portion (157, 257) providing a sliding surface adapted for guiding the drive tube (180, 280) during dosing. The drive tube (180, 280) comprises a guide structure comprising an axial portion (182, 282) adapted for slidably engaging the axial portion of the housing assembly for activation, and a helical portion (189, 289) for slidably engaging the helical portion of the housing assembly during dosing during dosing.

Implementations of the present disclosure are directed to a module for attachment to an injection device that includes a flexible carrier foil configured to be attached to a surface of the injection device independent of a geometry of the surface, at least one light emitting diode attached to the flexible carrier foil in a first position and configured to emit a light signal in a direction based on the first position through a transparent wall of the injection device, at least one photodiode attached to the flexible carrier foil in a second position relative to the first position, the at least one photodiode being configured to detect at least a portion of the light signal from a direction based on the second position and being configured to emit an electrical signal based on the light signal to a microprocessor, and wherein the microprocessor is configured to receive the electrical signal emitted by the photodiode and to determine the position of a stopper and the amount of the fluid within the injection device based at least in part on the electrical signal.

A drug delivery device includes a housing and a movable member, which is arranged to be rotatable in an incrementing direction and a decrementing direction, the movable member being operatively coupled to an energy storage member and biased to rotate into the decrementing direction by energy stored or storable in the energy storage member. Rotation of the movable member in the incrementing direction increases the energy stored in the energy storage member. The drug delivery device also includes a locking system including a locking feature, a block feature, and a release member, wherein the locking feature is arranged to cooperate with the block feature to form a releasable locking interface configured such that, when the releasable locking interface is established, rotational movement of the movable member relative to the housing is blocked in the decrementing direction, and when the releasable locking interface is released, the movable member is rotatable in the decrementing direction.

The present disclosure relates to a dose detection system for use in combination with a medication delivery device in which a dose setting member rotates relative to an actuator during dose delivery. The dose detection system includes a module which is removably attached to the medication delivery device. The module includes a dosing component attached to the actuator during dose delivery. The dosing component includes a light source and a light sensor. A sensed element is attached to the dose setting member and includes surface features detectable by the light sensor.

An assistance device for the use with a product dispensing device includes an engaging unit to the dispensing device, a locking unit for locking the dispensing device and configured to prevent or permit dispensing of the product, and a measurement unit for measuring a quantity of the product dispensed by the dispensing device. The locking unit remains unlocked for a predetermined period of time starting from a predetermined activation of the assistance device and then locks automatically at the end of the predetermined period. The locking unit locks automatically when a quantity of the product dispensed during the predetermined period reaches or exceeds a predetermined threshold.

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.