An injection device for setting and injecting a dose of a medicament comprises a housing) extending along an axial direction (z), a dose setting mechanism arranged in the housing, a dose dial displaceable relative to the housing for setting of the dose, a dose tracker (50; 150) operably connectable to the dose dial (12), the dose tracker is at least one of translationally or rotationally displaceable relative to the housing during setting of a dose, wherein a positional state of the dose tracker relative to the housing is indicative of a size of the dose, and a preselector configured to define a maximum dose positional state of the dose tracker relative to the housing, and a first marker provided on one of the dose tracker and the preselector and configured to indicate the positional state of the dose tracker relative to the preselector.

The invention relates to an automatic injector device comprising a single-use, disposable, drug delivery assembly comprising a housing and a syringe assembly located at least partially within the housing, said syringe assembly including a plunger, a pre-filled unit-dose drug containing chamber, and needle, said plunger, drug containing chamber and needle being configured and dimensioned to function as an injection syringe; a reusable motorized transmission assembly comprising a housing, a motor and transmission assembly located within the housing, said transmission assembly being configured and dimensioned to engage the plunger of said syringe in the drug delivery assembly and expel said unit dose dmg from the drug containing chamber, into the needle and out of the drug delivery assembly; said single-use disposable drug delivery assembly and said reusable motorized transmission assembly are in substantial axial alignment along a longitudinal axis defined by the syringe, plunger, pre-filled unit-dose drug containing chamber, and needle.

An autoinjection housing device includes a housing for receiving a dose cassette, a base latch configured to hold the dose cassette within the housing, and a back plate operably connected to a spring. The back plate is configured to move proximally within the housing upon receipt of the dose cassette into the housing, and the proximal movement of the back plate compresses the spring. The autoinjection housing device further includes an actuator operably connected to the base latch. The actuator is configured to move the base latch and the dose cassette proximally within the housing after the dose cassette is secured in the housing. The base latch is configured to move radially outwards upon said proximal movement of the base latch within the housing. The radial movement of the base latch is configured to cause the dose cassette to become unsecured within the housing. In response to the dose cassette becoming unsecured, the spring decompresses, causing the back plate to move distally and push the dose cassette out of a distal end of the housing.

Syringe assemblies are described herein. A syringe assembly includes an assembly housing, a first syringe, a second syringe, and a connecting gear. The first syringe is disposed within the assembly housing. Each plunger is movable within the respective syringe cavity and defines a respective chamber in the respective syringe cavity, wherein the respective chamber is in fluid communication with the respective syringe port, the respective plunger comprising a respective gear rack extending longitudinally along the respective plunger. The connecting gear is rotatably coupled to the assembly housing. The connecting gear is configured to be in meshed engagement with at least one of the first gear rack and the second gear rack of the syringes.

According to an embodiment, a cartridge driving module comprises a motor and a shaft extending along a rotational axis of the motor, a power transmission screwed to the shaft and moving forward when the shaft rotates in a forward direction and moving back when the shaft rotates in a backward direction, a pusher connected to the power transmission and exerting a pressure to a medicine cartridge containing a medicine when the power transmission moves forward, and a position maintaining unit exerting an external force to the power transmission in a direction along which the power transmission moves forward, when the power transmission moves back up to a predetermined stop position.

An adapter for releasably attaching a syringe to an injector. The adapter comprises a mounting mechanism positioned at a rear end of the adapter to mount the adapter in a desired position relative to a front wall of the injector; and a syringe carrier section adapted to seat at least a portion of the syringe. The syringe carrier section defines a first opening on a top thereof to allow placement of the syringe therein from the top and a second opening in a rear section thereof to allow the drive member of the injector to communicate forward force to the plunger. A cover portion extends over a rearward end of the first opening and has a first end configured to abut the flange of the syringe when the syringe is positioned within the syringe carrier section.

An injection device includes a drive mechanism, and the drive mechanism in turn includes a drive rod being axially moveable, a plunger rod being axially moveable, and a gear assembly. The gear assembly is arranged such that an axial movement of the drive rod generates an axial movement of the plunger rod. This allows for a force transmission between the drive rod and the plunger rod, facilitating the expelling of viscous substances from the injection device.

Disclosed herein are delivery devices for delivering a volume of a drug product, placebo product, or other product including a fluid. The devices may include a barrel having a longitudinal axis, a proximal end region, and a distal end region. The proximal end region may include an opening, and the barrel may be configured to receive a drug therein. A plunger rod may be disposed at least partially inside the barrel and protruding from the opening. The plunger rod may include a rack having a plurality of teeth. The device may further include a pinion having a plurality of teeth configured to engage with the plurality of teeth of the rack, and rotation of the pinion against the rack may move at least a part of the plunger rod along the longitudinal axis of the barrel.

A device includes a motor and a hollow drive shaft. The motor is configured to rotate the hollow drive shaft. A lead screw nut is operably connected to the hollow drive shaft. The lead screw nut is configured to rotate upon rotation of the hollow drive shaft. A lead screw is operably connected to the lead screw nut. The lead screw is configured to move within the lead screw nut and the lead screw is configured to pass through at least part of the hollow drive shaft.

A drug delivery device includes a magnet assembly, a coil assembly and processing circuitry. The magnet assembly has a plurality of magnets arranged in a ring. The coil assembly has one or more coils. The magnet assembly and the coil assembly are arranged to rotate relative to each other during ejection of medicament from the drug delivery device such that a voltage signal is produced in the coil assembly when a unit of dose is ejected. The processing circuitry is arranged to: receive the voltage signal; increment a counter in response to receipt of the voltage signal; and store information indicative of the number of units of dose ejected during a medicament ejection.