1. A node designed for a device (1) for the delivery of a medicinal product, comprising: - a housing (3), - a cartridge holder (2) made with the possibility of separable connection with the housing (3), - an elastic element (10), - providing interaction element (14), which is configured to provide mechanical interaction with the elastic element (10) and the cartridge holder (2), while the elastic element (10) or an additional elastic element is configured to rotate the element (14 ), about providing interaction, with a preload, while the assembly has a locked state in which the cartridge holder (2) is connected to the housing (3), this prevents the cartridge holder (2) from moving relative to the housing (3), and the unlocked state in which the connection between the holder (2) of the cartridge and the housing (3) is disconnected, while the holder (2) of the cartridge can move freely relative to the housing (3), and at the same time to switch from the unlocked state to the locked state, the holder (2) the arthridge is introduced into mechanical interaction with the interaction element (14), the cartridge holder (2) is rotated in the first direction relative to the housing (3), thereby the interaction element (14) is rotated in the first direction so that the interaction element (14) is mechanically interacts with the elastic element (10), and so that the turning force applied to the interaction element (14) by means of the elastic element (10) is overcome to switch the assembly from time to time1. Узел, предназначенный для устройства (1) для доставки лекарственного препарата, содержащий:- корпус (3),- держатель (2) картриджа, выполненный с возможностью разъединяемого соединения с корпусом (3),- упругий элемент (10),- обеспечивающий взаимодействие элемент (14), который выполнен с конфигурацией, обеспечивающей возможность механического взаимодействия с упругим элементом (10) и с держателем (2) картриджа,при этом упругий элемент (10) или дополнительный упругий элемент
