The present disclosure relates to an activation assembly for a medicament delivery device (1), wherein the activation assembly comprises: a delivery member cover (5) provided with legs and configured to be biased in a proximal direction, a movable sleeve (17) configured to be received between the legs, and an activation sleeve (19) configured to be biased in the proximal direction, wherein the delivery member cover (5) is configured to be moved in an axial direction between a first position relative to the movable sleeve (17) and a second position relative to the movable sleeve (17), wherein movement of the delivery member cover (5) from the first position to the second position causes movement of the movable sleeve (17) from a first movable sleeve position to a second movable sleeve position, wherein the delivery member cover (5) is configured to axially displace the activation sleeve (19) in a distal direction when the delivery member cover (5) is moved towards the second position, the activation sleeve (19) being configured to thereby provide a first actuation of a sensor (31) of an electronics assembly (29) of the medicament delivery device (1), wherein the activation sleeve (19) is configured to move in the proximal direction when the delivery member cover (5) returns from the second position to the first position, thereby providing a second actuation of the sensor (31), and wherein the movable sleeve (17) is configured to prevent the delivery member cover (5) from moving from the first position to the second position when the delivery member cover (5) has returned from the second position to the first position.La présente invention concerne un ensemble d'activation pour un dispositif d'administration de médicament (1), l'ensemble d'activation comprenant : un couvercle d'élément de distribution (5) pourvu de pieds et configuré pour être sollicité dans une direction proximale, un manchon mobile (17) conçu pour être reçu entre les pieds, et un manchon d'activatio
