Medicament delivery device

A medicament delivery device configured to expel a medicament from a medicament container comprising an injection needle, the medicament delivery device comprising:

• a housing;
• a medicament delivery member having a tubular body extending along an axis in an axial direction from a proximal end to a distal end, the medicament delivery member comprises an opening configured to receive the medicament container, wherein the medicament delivery member is axially movable within the housing;
• a syringe collar at least partly enclosed by the medicament delivery member, wherein the medicament delivery member and the syringe collar are axially movable within the housing relative to each other;
• and
• a medicament delivery member spring arranged between, and in contact with, the medicament delivery member and the syringe collar,
• a rotator having a distal end and a proximal end, wherein the rotator is arranged within a portion of the housing,
• wherein the medicament delivery device is configured to assume a retracted state in which the injection needle is arranged inside the medicament delivery member and prevented from external exposure, and a protracted state in which the injection needle is configured to protrude proximally from the proximal end of the medicament delivery member,
• wherein, when the medicament delivery device transitions from the retracted state to the protracted state, the medicament delivery member is arranged stationary relative to the housing and the syringe collar is arranged to move relative to the medicament delivery member in a proximal direction and compress the medicament delivery member spring against the medicament delivery member, and
• wherein the syringe collar is axially locked to a surface portion of the housing when the medicament delivery device assumes the protracted state such that an axial force from the syringe collar, generated during the transition from the retracted state to the protracted state, is absorbed by the surface portion of the housing,
• wherein the proximal end of the rotator comprises a surface portion arranged in abutment with a distally facing surface portion of the housing when the medicament delivery device assumes the protracted state.