DRUG DELIVERY DEVICE, PLUNGER ROD, SET OF PLUNGER RODS, METHOD FOR ASSEMBLING A DRUG DELIVERY DEVICE AND SET OF DRUG DELIVERY DEVICES

The invention relates to a drug delivery device (1000) comprising a housing (100) configured to receive a medicament container (8) with a stopper (82) proximally sealing the medicament container. Furthermore, the drug delivery device comprises a plunger rod (1) arranged axially movable with respect to the housing and/or the medicament container and a feedback mechanism operatively coupled to the plunger rod. The drug delivery device has an initial state in which the plunger rod is in a start position. The drug delivery device is configured such that, in the initial state and when the medicament container is received in the housing, the plunger rod is axially spaced from the stopper. Furthermore, the drug delivery device is configured such that the plunger rod is axially movable from its start position in a distal direction into a feedback position. The movement of the plunger rod in the distal direction enables the plunger rod to interact with the stopper in order to push the stopper in the distal direction such that a medicament stored in the medicament container is delivered. The feedback mechanism is triggered when the plunger rod reaches the feedback position. Triggering of the feedback mechanism creates an audible and/or tactile feedback in order to indicate an end of the medicament delivery. The invention also relates to a plunger rod, a set of plunger rods, a set of drug delivery devices and a method for assembling a drug delivery device.