An assembly for a drug delivery device is provided comprising a housing, a cartridge holder releasably connectable to the housing, a resilient member, and an interaction member which is configured to mechanically cooperate with the resilient member and with the cartridge holder. The resilient member is configured to rotationally bias the interaction member. The assembly has a locked state where the cartridge holder is connected to the housing, the cartridge holder being obstructed from movement with respect to the housing, and an unlocked state where the connection between the cartridge holder and the housing is released, the cartridge holder being freely moveable with respect to the housing.

A dose setting mechanism for a medicament delivery device is presented having a pinion mounted to a locking member where the axis of rotation of the pinion is offset and parallel to the longitudinal axis of the housing containing the dose setting components. Primary and secondary dose members are engaged with the pinion to indicate a set dose of medicament.

Described is an injection device (1) for administering a drug, the injection device (1) comprising a cartridge holder (2) adapted to receive a drug cartridge (3), a hollow injection needle (6) having a proximal tip (6.2) adapted to pierce a septum (4) of the cartridge (3) so as to establish a fluid communication between the cartridge (3) and the needle (6), and a cap (7) arrangeable over the cartridge holder (2) in a manner to cover the needle (6). In an initial state the cartridge (3) is arranged within the cartridge holder (2) with the septum (4) axially spaced from the proximal tip (6.2) of the needle (6). The cap (7) is adapted to move the needle (6) relative to the septum (4) for piercing it on movement of the cap (7) relative to the cartridge holder (2).

There is provided a cassette unit suitable for use with an auto-injector. The cassette unit comprises a cassette unit housing and a removable cap that in a capping position fits over and thereby, acts to close off, a needle projection aperture of the housing. The cassette unit housing has one or more first engagement features arranged for reversibly engaging one or more second engagement features of the removable cap for reversible lock engagement of the removable cap to the housing; and a shuttle lock control defining one or more blocking elements for selectively blocking movement of said first engagement features relative to said second engagement features. The shuttle lock control is axially movable relative to the cassette unit housing between a first ‘cassette unused’ position; a second ‘cassette unlocked’ position; and after replacement of the removable cap, a third ‘cassette used’ position, locating intermediate the first and second positions.

Drug delivery device adapted to receive a cartridge, comprising a piston driver adapted to expel an amount of drug from a received cartridge, and a base member adapted to engage a cartridge and position the cartridge relative to the piston driver, the base member comprising a main portion with a central passage, a portion of the piston driver being arranged axially displaceable through the passage, the piston driver distal end being arranged distally of the central passage, and flexible centring means adapted to receive the proximal end of a cartridge and centre it relative to the central opening and thereby to the piston driver.

An apparatus for transdermal injection includes a sleeve including a proximal end, a distal end, and an inner wall surface extending along the sleeve from a first opening at the proximal end to a second opening at the distal end. The inner wall surface forms a channel in the sleeve, the channel having a first portion with a substantially frustoconical shape. The channel of the sleeve is configured to receive a substantially frustconically shaped injection cartridge, to substantially uniformly support the injection cartridge during a transdermal injection operation, and to prevent movement of the injection cartridge out of the distal end of the sleeve.

Provided is a cassette unit suitable for use with an auto-injector having an electrically powered drive unit. The cassette unit comprises a cassette unit housing defining a cassette unit housing cavity and a needle projection aperture. The housing cavity may receive a syringe. Axially movable within the barrel of the syringe for forward movement into contact with the syringe plunger, there is a plunger slaving part defining a circumferential wall arranged for frictional sliding relationship with the inner wall of the barrel, a rear drive-receiving face and a front plunger-contacting face. The plunger slaving part is arranged such that when a drive load is applied to its rear drive-receiving face to bring the front plunger-contacting face into contact with the plunger the drive load is evenly transmitted. The circumferential wall is provided with slide restrictors that restrict frictional sliding movement thereof in relation to the inner wall of the barrel.

A housing for a drug delivery device for administrating a liquid drug from a cartridge includes a recess for accommodating a proximal portion of the cartridge and a deformable member arranged inside the recess. The deformable member includes a proximal end attached to the housing and a distal end movable within the recess. The deformable member is deformable from a non-deformed state to a deformed state by a displacement of the distal end. In the deformed state the deformable member is adapted to limit a movement of a cartridge in the longitudinal direction relative to the housing. The deformable member further includes an arch, and in the deformed state the arch is deformed both elastically and plastically.

The present disclosure relates to a support structure for a medicament container used in a medicament delivery device. The support structure accommodates an elongated plunger rod and a drive spring and can have a tubular body having a predetermined radial dimension, a longitudinal axis (A), a distal end and a proximal end and at least one first flexible element arranged at the proximal end of the tubular body and having the same radial outer and inner dimensions as the tubular body. The flexible element is provided with a contact member with an outer radial dimension extending the outer dimension of the tubular body for compensating of manufacturing tolerances of the medicament containers made of glass.

A method and assembly are disclosed for interfacing between a drug cartridge and a drug delivery device. Optionally, the drug delivery device includes a compartment that retains the cartridge during drug delivery and/or a stopper pushing assembly mounted to the device behind (proximal to) the compartment. In some embodiments, the cartridge may be inserted laterally into the compartment in front of the pushing assembly. For example, the delivery device may include a moving cartridge bay. The cartridge is optionally inserted into the bay and/or the bay and cartridge optionally move into the cartridge compartment. Alternatively or additionally, the cartridge compartment may have a proximal opening into which the cartridge is inserted and/or the pushing assembly may be moved into position after insertion of the cartridge. In some embodiments the cartridge may have a distal seal that is broken by a longitudinal movement.