Medicament delivery device

A method of preparing a medicament delivery device for use prior to dispensing medicament from the medicament delivery device, the method comprising:

• removing a cap from the medicament delivery device, wherein the cap comprises a proximally-extending portion configured to prevent rotation of a lock ring of the medicament delivery device from a pre-use position to a use position;
• and
• rotating the lock ring from the pre-use position to the use position,
• wherein the medicament delivery device comprises:
• a body having a proximal end and a distal end defining a longitudinal axis;
• a needle;
• an actuation member movable relative to the body from a first position to a second position for dispensing the medicament via the needle;
• the lock ring rotatable relative to the body from the pre-use position in which movement of the actuation member from the first position to the second position is prevented, to the use position in which a movement of the actuation member from the first position to the second position is permitted;
• an axially-extending component rotationally constrained relative to the lock ring,
• wherein one of the axially-extending component and the lock ring comprises a first protrusion and the other of the axially-extending component and the lock ring comprises a first recess, and wherein the first protrusion is configured to be received in the first recess to constrain rotation of the axially-extending component relative to the lock ring, the axially-extending component being independently rotatable relative to the lock ring prior to engagement of the first protrusion and the first recess;
• and
• the cap removably attached to the medicament delivery device, wherein the cap comprises a proximally-extending portion configured to engage the axially-extending component to prevent rotation of the lock ring from the pre-use position to the use position when the cap is attached to the medicament delivery device,
• wherein one of the axially-extending component and the proximally-extending portion comprises a second protrusion and the other of the axially-extending component and the proximally-extending portion comprises a second recess, and wherein the second recess is a radially-extending recess extending towards the longitudinal axis and the second protrusion is a radially-extending protrusion extending towards the longitudinal axis and configured to be received in the radially-extending recess to rotationally constrain the proximally-extending portion relative to the axially-extending component when the cap is attached to the medicament delivery device, and wherein the engagement between the second protrusion and the second recess is released upon removal of the cap.

A method of using a medicament delivery device, the method comprising:

• removing a cap from the medicament delivery device, wherein the cap comprises a portion configured to prevent rotation of a lock ring of the medicament delivery device from a pre-use position to a use position;
• rotating the lock ring from the pre-use position to the use position;
• and
• moving an actuation member from a first position to a second position for dispensing medicament from the medicament delivery device, wherein the medicament delivery device comprises:
• a body having a proximal end and a distal end defining a longitudinal axis;
• a needle;
• an actuation member movable relative to the body from a first position to a second position for dispensing the medicament via the needle;
• the lock ring rotatable relative to the body from the pre-use position in which movement of the actuation member from the first position to the second position is prevented, to the use position in which a movement of the actuation member from the first position to the second position is permitted;
• an axially-extending component rotationally constrained relative to the lock ring,
• wherein one of the axially-extending component and the lock ring comprises a first protrusion and the other of the axially-extending component and the lock ring comprises a first recess, and wherein the first protrusion is configured to be received in the first recess to constrain rotation of the axially-extending component relative to the lock ring, the axially-extending component being independently rotatable relative to the lock ring prior to engagement of the first protrusion and the first recess;
• and
• the cap removably attached to the medicament delivery device, wherein the cap comprises a proximally-extending portion configured to engage the axially-extending component to prevent rotation of the lock ring from the pre-use position to the use position when the cap is attached to the medicament delivery device,
• wherein one of the axially-extending component and the proximally-extending portion comprises a second protrusion and the other of the axially-extending component and the proximally-extending portion comprises a second recess, and wherein the second recess is a radially-extending recess extending towards the longitudinal axis and the second protrusion is a radially-extending protrusion extending towards the longitudinal axis and configured to be received in the radially-extending recess to rotationally constrain the proximally-extending portion relative to the axially-extending component when the cap is attached to the medicament delivery device, and wherein the engagement between the second protrusion and the second recess is released upon removal of the cap.