US Patent 11291775 Medicament delivery device

A medicament delivery device is presented having a drive mechanism configured to act on a medicament container for expelling a medicament; a holding mechanism configured to hold said drive mechanism in a pre-tensioned state; an activation mechanism configured to interact with said holding mechanism for releasing said drive mechanism from the pre-tensioned state; wherein the device further includes a feedback mechanism configured to interact both with said holding mechanism and with said drive mechanism for generating an audible and/or tactile and/or visual signal indicating that the medicament has been completely expelled.