Sub-assembly for a medicament delivery device cassette unit

A sub-assembly for a medicament delivery device cassette unit, the sub-assembly comprising:

• a body extending along a longitudinal axis (L) from a proximal end to a distal end and having a protrusion extending radially relative to the longitudinal axis (L), wherein the body comprises an inner body for accommodating a medicament container;
• an outer shell;
• and a protrusion with a proximally extending surface, the protrusion extending radially relative to the longitudinal axis (L);
• a delivery member guard coaxially attached to the body and being axially movable relative to the body along the longitudinal axis (L) and having two distally extending flexible arms configured to move radially relative to the protrusion;
• the delivery member guard comprises an arm with a distally directed surface facing a corresponding proximally directed surface of the protrusion of the body;
• a latch adjacent to the delivery member guard and axially movable relative to the body;
• wherein at least a part of the delivery member guard and the latch are radially arranged between the inner body and an inner surface of the outer shell;
• and
• a lock member attached to the body;
• wherein the lock member is movable relative to the latch between a locked position and an unlocked position,
• wherein the lock member comprises a distally directed surface facing a proximally directed surface of the latch in the locked position;
• and wherein the distally directed surface of the lock member is further apart from the proximally directed surface of the latch in the unlocked position than in the locked position;
• and
• wherein the protrusion with the proximally directed surface protrudes from an outer surface of the inner body;
• wherein the latch comprises a radially directed surface facing a corresponding radially directed surface on the arm of the delivery member guard, so that when the lock member is in the locked position, the latch is restricted from moving in the proximal direction relative to the body, and wherein when the lock member is in the unlocked position, the latch is able to move in the proximal direction relative to the body, thereby providing space for the delivery member guard to travel in the distal direction by allowing the flexible arm to travel in the axial direction by moving axially past the radially directed surface of the latch and then moving radially past the protrusion of the body.