A sub-assembly of a medicament delivery device

A sub-assembly of a medicament delivery device, the sub-assembly comprising:

• a housing extending along a longitudinal axis between a distal end of the housing and a proximal end of the housing, wherein the housing is configured to accommodate a first medicament container with a first dimension and a first volume;
• an adapter comprising an adapter body extending in the direction of the longitudinal axis from a distal end of the adapter to a proximal end of the adapter, wherein the adapter body is arranged within the housing, wherein the adapter body is configured to accommodate a second medicament container dimensioned differently from the first dimension and capable of containing no more than the first volume of a medicament, wherein the adapter body is configured to operably retain the second medicament container within the housing so that the second medicament container is radially immovable within the housing;
• and
• a delivery member holder assembly arranged at least partially within the housing, wherein the delivery member holder assembly comprises a retainer and a delivery member hub configured to be attached to a medicament delivery member, wherein the retainer comprises a body attached to the housing and a central cavity extending through the body in the direction of the longitudinal axis, wherein the central cavity is configured to be lined up with a proximal end of the second medicament container when the second medicament container is accommodated in the adapter body, and wherein the delivery member hub is movable within the central cavity from a proximal position where the delivery member hub is configured to keep the medicament delivery member spaced apart from the second medicament container to a distal position where the delivery member hub is configured to enable the medicament delivery member to establish fluid communication with the second medicament container.

A method of assembling a sub-assembly of a cassette of a medicament delivery device, the method comprising the steps of:

• providing a group of housings, wherein the housings in the group of housings are identical;
• providing a group of medicament containers, wherein the group of medicament containers comprises a first medicament container with a first dimension and a first volume and a second medicament container with a second dimension, and wherein the second dimension is different from the first dimension and capable of containing no more than the first volume of a medicament;
• providing a group of delivery member holder assemblies, wherein each of the delivery member holder assemblies in the group of delivery member holder assemblies comprises a retainer and a delivery member hub configured to be attached to a medicament delivery member, wherein the retainer comprises a body and a central cavity extending through the body in the direction of the longitudinal axis, wherein the delivery member hub is movable within the central cavity;
• providing an adapter;
• selecting a medicament container from the group of medicament containers;
• selecting a delivery member holder assembly from the group of the delivery member holder assemblies;
• inserting the selected medicament container into the housing when the first medicament container is selected or connecting the selected medicament container to the adapter when the second medicament container is selected, and inserting the selected medicament container with the adapter into the housing;
• and
• attaching the selected delivery member holder assembly to the housing so that the central cavity of the retainer is lined up with the selected medicament container.