Pharmaceutical cartridge holding unit, and pharmaceutical injection device provided therewith

A pharmaceutical cartridge holding unit which holds a pharmaceutical-filled cartridge and is configured to be mounted to a pharmaceutical injection device main body, in order to mount the pharmaceutical-filled cartridge to a pharmaceutical injection device, the pharmaceutical cartridge holding unit comprising:

• an outer peripheral cap having a front end side opening and a rear end side opening;
• and
• a cartridge cover on an inside of the outer peripheral cap, the cartridge cover being configured to slide forward and backward with respect to the outer peripheral cap, and the cartridge cover including a guided part protruding outward therefrom,
• wherein the outer peripheral cap has:
• a guide component including risers with respective recesses defined therein, the guide component being configured to guide sliding of the cartridge cover forward and backward;
• a stopper configured to prevent the cartridge cover from coming loose from the outer peripheral cap in a state of the pharmaceutical cartridge holding unit being separated from the pharmaceutical injection device main body;
• and
• an engagement component that can engage with the pharmaceutical injection device main body;
• and
• wherein the guided part is sandwiched between the risers and is configured to be guided forward and backward within the recesses.