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.

A computer-controlled injector for use with a medicament cartridge and including a housing having a medicament cartridge receiving volume and a medicament cartridge insertion and removal opening communicating with the medicament cartridge receiving volume; a pivot mount element mounted onto the housing for selectably enabling access to the medicament cartridge receiving volume via the opening; a mechanical latch selectably locking the pivot mount element in a closed operative orientation; and an injection drive mechanism including a computer-controlled motor for driving a piston, forming part of the medicament cartridge, for injecting a medicament, the computer-controlled motor also being operative for operating the mechanical latch.

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 medicament delivery device is presented having a proximal disposable part arranged with a body and a delivery member cover telescopically arranged in relation to the body wherein the proximal disposable part is configured to receive a medicament container. A distal reusable power pack is detachably arranged with the proximal disposable part such that the delivery member cover has an extension position in which the delivery member cover is extended in the proximal direction to cover a medicament delivery member of the medicament container, and a retraction position in which the delivery member cover is retracted in the distal direction to expose said medicament delivery member. The distal reusable power pack can have a power unit, a rotational drive unit and a plunger unit, where the rotational drive unit is powered by the power unit and is configured to move the plunger unit upon being triggered.

An electronic system for a drug delivery device including a dose setting and drive mechanism, a communication unit, an electronic control unit, and an electrical use detection. The dose setting and drive mechanism includes a first member and a second member that move relative to each other at least in the dose delivery operation and/or in the dose setting operation of the drug delivery device. The electronic system has a first state in which the communication unit is not activated and a second state in which the communication unit is activated. The electrical use detection unit is configured to generate a first signal indicative that the user has commenced or finished the relative movement between the first member and the second member. The electronic control unit is configured to switch the electronic system from the first state into the second state in response to the first signal.

A multi-dose injector comprising an inner housing (16) and an outer housing (12), the inner housing (16) being movable within the outer housing for a defined distance, a plunger rod (20) comprising a shaft (66) mounted within the inner housing (16) the shaft (66) having a plurality of spaced apart teeth (68) formed thereon, an actuator (22) located at one end of the shaft (66), the inner housing (16) having at least one pawl (70) arranged to engage with the teeth (68), a syringe (74) mounted interiorly of the inner housing (16), the syringe being arranged such that the shaft engages with a plunger within the syringe, and a spring member (18), the spring member (18) being biased between the inner housing (16) and the outer housing (12).

A set of at least two drug delivery devices includes a first drug delivery device and a second drug delivery device, The first and second drug delivery devices each include a first set of mutual members that are identical, and the first drug delivery device and the second drug delivery device each include a second set of distinguishing members that differ. The first drug delivery device includes a first connection device for attaching a first dispensing unit to the first drug delivery device and the second drug delivery device includes second connection device for attaching a second dispensing unit to the second drug delivery device, the first and second connection devices differ from each other so that the second dispensing unit is not attachable to the first connection device and the first dispensing unit is not attachable to the second connection device.

The disclosure relates to a sensor arrangement for an injection device to determine an axial position of at least one device component of the injection device inside a housing of the injection device. The sensor arrangement includes an elongated member located inside the housing, extending in an axial direction and having at least a first section and a second section of different magnetization. The first and second sections are separated in the axial direction. The sensor arrangement also includes at least one magnetic sensor element attached to the housing to detect the axial position of at least one of the first and second sections.

A drug injection control device allows a structure in which a piston rod moving with a rod guide makes a linear motion to stably inject a drug set through a dose dial. When an injection amount of drug is preset through an injection amount setting module configured to make a rotational motion with the dose dial in a housing to set the amount of drug to be injected by storing the twisting moment in a torsion spring, in actuating a drug delivery module switchably coupled to the injection amount setting module by an injection button on top of the drug injection control device, the rod guide is connected to the inside of the piston rod through a reset tube movably coupled to the injection button to allow a sub-linear motion of the piston rod.

A computer-controlled injector, including a housing arranged along a longitudinal axis and configured to receive a cassette assembly, containing a medicament cartridge; the housing includes a cassette assembly receiving volume and a cassette assembly insertion and removal opening communicating with the cassette assembly receiving volume; at least one locking element for locking the cassette assembly with respect to the housing upon axial insertion of the cassette assembly into the housing; and an injection drive mechanism including a computer-controlled motor for driving a piston, forming part of the medicament cartridge, for injecting a medicament, the computer-controlled motor also being operative for operating the at least one locking element for releasing the cassette assembly from the housing.