A detent mechanism for controlling translation between two components in a longitudinal direction includes a resilient beam on one of the components and a rhomboid ramp member on the other component. The resilient beam is essentially straight when relaxed and has a first beam head and is arranged to interact in a ramped engagement with respectively one of two ramps. Each ramp is on one longitudinal side of the rhomboid ramp member such that application of a translative force between the components in one longitudinal direction with the first beam head engaged to one of the ramps in a first state deflects the resilient beam in one transversal direction and such that application of a translative force between the components in the other longitudinal direction with the first beam head engaged to the other one of the ramps deflects the resilient beam in the other transversal direction.

The present disclosure relates to a cap for an injection device. The injection device comprises a body for holding a syringe having a needle extending from an end thereof. The cap is removably attachable to the body. The cap comprises an actuator and a needle shield to cover said needle. The cap further comprises a coupling between the actuator and the needle shield. The coupling is configured such that when the cap is attached to the body of an injection device axial movement of the actuator away from the body causes rotation of the needle shield relative to the body.

A shroud lock for locking a position of a needle shroud relative to a housing of an autoinjector, includes a shroud beam arranged on the needle shroud and biased radially outwards, a stop arranged within the housing, a recess arranged proximal of the stop, and a cap coupled to the housing and adapted to prevent distal translation of the needle shroud relative to the housing. At least a portion of the shroud beam is within the recess when the cap is in place and, the shroud beam abuts the stop after the needle shroud is locked relative to the housing of the autoinjector. The disclosure further relates to an autoinjector and to a method for assembling such an autoinjector.

Needle shroud assemblies comprising a needle shroud and a support component. At least one of the needle shroud assemblies includes: a shroud body having an inner surface forming a cavity; a shroud beam arranged on the shroud body and biased radially outwards, wherein the support component is arranged on the inner surface of the shroud body and configured to form an inner radial support surface for the shroud body and/or for the shroud beam.

A cannula cartridge for receiving a cannula includes a needle assembly, a cannula and a protector. The needle assembly is movable within the protector between first and second positions. In the first position the needle is covered by the protector and a retainer of the protector engages an engagement element of the needle hub by a form fit connection. In the second position the needle at least partially extends from the protector. An inserter can move the needle assembly between the first position and to the second position and then back to the first position. The retainer and the engagement element are configured such that a holding force of the retainer is overcome by applying forces parallel to the axis of the needle. An inventive kit that includes an inserter and a driver for moving the needle assembly and a method of manufacturing the cannula cartridge are also disclosed.

An injector includes a trigger mechanism including: a trigger member disposed about an axis having an aperture and a protrusion, and a ram assembly having a ram configured to pressurize a medicament container for expelling a medicament therefrom, the ram assembly further having a trigger engagement member configured to engage the aperture of the trigger member when the trigger member is in a pre-firing condition; an energy source associated with the ram for powering the ram to expel the medicament; and a user-operable firing-initiation member having an aperture engaged with the protrusion of the trigger member and operable for causing an axial translation of the trigger member in a proximal direction from the pre-firing condition to a firing condition in which the trigger engagement member is released from the retaining portion to allow the energy source to fire the ram.

A portable auto-injector configured to store a dry medication separately from a liquid component, wherein removal of a cap operates a first actuation mechanism which opens a valve between a first and second chamber that are slidably movable relative to each other and thus allows for the initiation of a mixing step prior to injection. An extendable needle guard is provided over the delivery assembly which prevents premature injection as well as inadvertent sticks or other cross contamination of a needle. The needle guard can also form part of a secondary trigger mechanism which injects the mixed components after the mixing stage is complete.

An injection device for administering a medical substance includes a helical spring having a coil that extends in an axial direction and has at least three windings, where two adjacent windings are non-detachably connected to one another at a point in the axial direction by means of a laser-welded connection. The helical spring and a method for producing the helical spring for use with the injection device are also provided.

A rotational locking type safety insulin pen needle includes a needle body, intermediate shield, front shield, tail cover and rear spring, wherein: the intermediate shield provides a rotating tube, the tube provides a beveled rail on the outer edge; the front shield provides a bevel acting part on the inner edge; the tail cover provides an elastic leg, the leg provides a front protection stopper; the rotating tube provides a first and second rail slot at intervals along the circumferential direction. The backward movement of the front shield when the needle is pushed to drive the rotation of the rotating tube and uses the coordination of the first and second rail slot on the rotating tube and the rear protection stopper on the tail cover to change the coordination relationship between the tail cover and the rotating tube, which provides the reliable locking protection of the tail cover after use.

A rotational locking type safety insulin pen needle comprises a needle body, intermediate shield, front shield and a spring, wherein the intermediate shield has a rotating tube with a beveled rail on the outer edge; the front shield has a bevel acting part on the inner edge; the rotating tube has an elastic arm in the front with a front protection stopper; relative to the front protection stopper, the front shield has a guiding and a limit slot at intervals along the circumferential direction. The backward movement of the front shield when the needle is pushed to drive the rotation of the rotating tube and uses the coordination of the front protection stopper on the rotating tube with the guiding and limit slot on the front shield to change the coordination relationship between the front shield and the rotating tube, which provides the reliable locking protection of the front shield.