Dedicated cartridge

A cartridge assembly for use with a drug delivery device, the cartridge assembly comprising:

• a cartridge holder designed for being connected with a drug delivery mechanism, the cartridge holder having a distal end and a proximal end;
• a cartridge having a distal end with a retention cap and a proximal end;
• and
• a snap lock with a snap and a clip for attachment of said cartridge with said cartridge holder, wherein one of the snap and the clip is comprised by the retention cap and wherein the other one of the snap and the clip is comprised by the cartridge holder,
• wherein a main body of the cartridge is positionally fixed with respect to axial movement or with respect to axial and rotational movement by means of mechanical interaction of the retention cap with the cartridge holder,
• wherein the cartridge and the cartridge holder are configured to be fixed to each other in a predetermined rotational position, with the distal end of the cartridge holder being positioned adjacent the distal end of the cartridge,
• wherein said retention cap comprises at least one coding feature comprising circumferential protrusions, indents, or a combination thereof and wherein the at least one coding feature is configured to affix said cartridge to said cartridge holder in the predetermined rotational position by mating of said at least one coding feature with a corresponding coding feature on said cartridge holder, wherein the corresponding coding feature comprises circumferential indents, protrusions, or a combination thereof,
• wherein the predetermined rotational position is chosen out of one or two possible predetermined rotational positions,
• wherein the snap and the clip of the snap lock are unable to engage when the at least one coding feature of the retention cap does not fit within the corresponding coding feature of the cartridge holder, and wherein said cartridge holder comprises an arc-shaped main body extending from a cylindrical base, and
• wherein said cartridge is obliquely inserted into said cartridge holder by placing the proximal end of said cartridge on said base, and pressing said cartridge against said arc-shaped main body, and wherein, when said cartridge is pressed against said arc-shaped main body, said at least one coding feature on the retention cap mates with said corresponding coding feature.

A cartridge assembly for use with a drug delivery device, the cartridge assembly comprising:

• a cartridge holder designed for being connected with a drug delivery mechanism, the cartridge holder having a distal end and a proximal end;
• a cartridge having a distal end with a retention cap and a proximal end;
• and
• a snap lock with a snap and a clip for attachment of said cartridge with said cartridge holder, wherein one of the snap and the clip is comprised by the retention cap and wherein the other one of the snap and the clip is comprised by the cartridge holder,
• wherein a main body of the cartridge is positionally fixed with respect to axial movement or with respect to axial and rotational movement by means of mechanical interaction of the retention cap with the cartridge holder;
• wherein the cartridge and the cartridge holder are configured to be fixed to each other in a predetermined rotational position, with the distal end of the cartridge holder being positioned adjacent the distal end of the cartridge;
• and
• said retention cap comprises at least one coding feature comprising axial protrusions, indents, or a combination thereof at a proximal end of the retention cap and wherein the at least one coding feature is configured to affix said cartridge to said cartridge holder in the predetermined rotational position by mating of said at least one coding feature with a corresponding coding feature on said cartridge holder, wherein the corresponding coding feature comprises axial indents, protrusions, or a combination thereof at the distal end of said cartridge holder,
• wherein the predetermined rotational position is chosen out of one or two possible predetermined rotational positions,
• wherein the snap and the clip of the snap lock are unable to engage when the at least one coding feature of the retention cap does not fit within the corresponding coding feature of the cartridge holder,
• wherein the snap of the snap lock is designed such that the cartridge is insertable into an aperture at a distal end of the cartridge holder and said cartridge can subsequently be removed from said cartridge holder by a pulling force removing said cartridge holder from said cartridge, such that said cartridge slips through the distal end of said cartridge holder.