A sub-assembly of a medicament delivery device

A sub-assembly of a medicament delivery device, wherein the medicament delivery device comprises a medicament container containing a medicament and a medicament delivery member operably connected to the medicament container for delivering the contained medicament, the sub-assembly comprising:

• a housing having a housing body extending along a longitudinal axis between a proximal end and a distal end, wherein the housing body is configured to accommodate the medicament container;
• and
• a cap assembly comprising a cap body, wherein the cap body is releasably attached to the proximal end of the housing body, wherein the cap body is configured to cover the medicament delivery member when the cap body is attached to the proximal end of the housing body,
• wherein the cap assembly comprises a set of electronics comprising a battery, a circuit and a switch, wherein the switch comprises a distally directed surface, wherein the set of electronics is attached to the cap body, wherein the switch is operable between an active state where the circuit is connected to the battery and an inactive state where the circuit is disconnected from the battery, and wherein the housing comprises a proximally directed surface engaged with the distally directed surface of the switch when the cap body is attached to the housing body such that the switch is in the inactive state when the proximally directed surface is engaged with the distally directed surface of the switch and is in the active state when the proximally directed surface is disengaged from the distally directed surface of the switch.