| abstract |
The present invention relates to a drive mechanism for a drug delivery device as well as to a drug delivery device for dispensing of a dose of a medicinal product, wherein the drive mechanism comprises: n a holder for a product-containing cartridge, the cartridge having a piston slidably arranged therein in an axial direction, n a piston rod to be operably engaged with the cartridge's piston for dispensing of a dose of the medicinal product, n at least one adjusting member slidably arranged in axial direction relative to the piston and/or relative to the piston rod for eliminating axial clearance between the piston and the piston rod, n an interlock means adapted to interact with the adjusting member for mutually locking in position the piston and the piston rod irrespective of the relative distance between piston and piston rod. |