Abstract: An add-on device of an injection device includes a device body and a movable part. A spacer for the add-on device is detachably fastenable to the add-on device. The movable part is movable relative to the device body along a first direction. The spacer includes a spacer body including an engaging portion to detachably fasten to one of the device body and the movable part. The spacer body is operable to impede a movement of the movable part relative to the device body with regard to the first direction when fastened to the device body or the movable part.

Abstract: The present disclosure relates to a cartridge holder of an injection device, the cartridge holder comprising a tubular shaped elongated sleeve extending in an axial direction to accommodate a cartridge filled with a medicament, wherein the sleeve (29) comprises: a proximal connecting end to connect with a distal connecting end of a body of the injection device, which body is configured to accommodate a drive mechanism of the injection device and which drive mechanism is operably engageable with a piston of the cartridge, a flange section extending radially outwardly from an outside surface of the sleeve and having a proximally facing abutment face to axially abut with a distal end face of the distal connecting end of the body, at least three protrusions located distally from the flange section, extending radially outwardly from the outside surface of the sleeve and being distributed around the circumference of the sleeve.

Abstract: The present disclosure relates to a cartridge holder of an injection device, the cartridge holder comprising a tubular shaped elongated sleeve extending in an axial direction to accommodate a cartridge filled with a medicament, wherein the sleeve (29) comprises: a proximal connecting end to connect with a distal connecting end of a body of the injection device, which body is configured to accommodate a drive mechanism of the injection device and which drive mechanism is operably engageable with a piston of the cartridge, a flange section extending radially outwardly from an outside surface of the sleeve and having a proximally facing abutment face to axially abut with a distal end face of the distal connecting end of the body, at least three protrusions located distally from the flange section, extending radially outwardly from the outside surface of the sleeve and being distributed around the circumference of the sleeve.