Injector device having a braking arrangement

An injector device comprising:

• a housing for receiving a medicament container;
• a drive mechanism for dispensing a medicament from the medicament container received in the housing, the drive mechanism comprising a plunger rod and a displacing member configured to displace a distal end of the plunger rod into the medicament container to dispense the medicament;
• and
• a brake configured to control a rate of displacement of the plunger rod under a force of the displacing member,
• wherein the brake comprises a braking surface that contacts an outer surface of the plunger rod so that movement of the plunger rod is resisted by friction between the braking surface and the outer surface of the plunger rod,
• wherein the injector device comprises a brake force adjustment mechanism configured to adjust a contact pressure between the braking surface and the outer surface of the plunger rod, and
• wherein the brake force adjustment mechanism comprises a collar rotatably mounted on the housing, the collar being rotatable around a longitudinal axis of the injector device to adjust the contact pressure between the braking surface and the outer surface of the plunger rod, or
• wherein the brake force adjustment mechanism comprises a sleeve slidably mounted to the housing, the sleeve being configured to slide along the longitudinal axis of the injector device to adjust the contact pressure between the braking surface and the outer surface of the plunger rod.