A set is provided to a device (1) of Drug Administration comprising a housing (3), a bracket (2) cartridge which can connect a releasable to the accommodation (3), an Elastic Member (10), and a member of Interaction (14) that is configured to cooperate m Ec u00e1nicamente with the Elastic Member (10) and the cartridge Holder (2).The Elastic Member (10) is configured to bias The Interaction on a rotating Member (14).The set has a locked State in which the holder (2) is connected to the cartridge housing (3), the support (2) cartridge has obstructed the Movement with respect to the housing (3), and an unlocked State in which releases the connection between the support and the cartridge (2) Accommodation (3), the support (2) cartridge is freely movable on the housing (3).To change the State from the State Lock jammed, the cartridge Holder (2) is taken to a Mechanical interaction with the cooperation of Member (14), the cartridge Holder (2) is rotated in a First direction with respect to the housing (3),The Member interaction in (14) is rotated in the first direction such that the Member of Interaction (14) interacts mechanically with the Elastic Member (10) and in such a way that a Force exerted on the rotating Member (14) interaction through the Elastic Member (10) is To change the set from the second State to unlock locked State.In addition, it provides a device (1) of Drug Administration.Se proporciona un conjunto para un dispositivo (1) de administración de fármacos que comprende un alojamiento (3), un soporte (2) de cartucho que se puede conectar de manera liberable al alojamiento (3), un miembro elástico (10), y un miembro de interacción (14) que se configura para cooperar mecánicamente con el miembro elástico (10) y con el soporte (2) de cartucho. El miembro elástico (10) se configura para predisponer de manera rotatoria el miembro de interacción (14). El conjunto tiene un estado trabado en el que el soporte (2) de cartucho se conecta al alojamiento (3), el sopo
