Cartridge holder and method for assembling a cartridge unit for a drug delivery device

摘要

A cartridge holder for retaining a cartridge comprising a distal end and a proximal end being spaced apart from one another in the direction of an axis, an interior which is suitable to receive and retain a cartridge in a cartridge retaining section of the interior, and a main part and at least one protrusion which is moveably connected to the main part. The protrusion is arranged to define the radial extension of a subsection of the interior, wherein the subsection is arranged at an axial position which is further away from the distal end than the cartridge retaining section. Furthermore, the protrusion is arranged to vary the radial extension of the subsection when the protrusion is moved with respect to the main part. Moreover, a method for securing a cartridge in a cartridge holder is proposed.