INJECTION APPARATUS Russian patent published in 2017 - IPC A61M5/315 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to injection devices. The apparatus includes a housing which holds the receiving device for the reservoir with injected liquid and the control button, which can be rotated and moved to adjust the amount of injected fluid extruded from the reservoir, in case of rotation relative to the housing along the central longitudinal axis of the injection apparatus in the distal direction. Moreover, for injected fluid extruding from the reservoir, a possibility to move the control button along the central longitudinal axis in the proximal direction of the injection apparatus is provided. At that, the injection apparatus comprises an injection sleeve, which is connected to the housing without the possibility of relative rotation and which is movable axially. Moreover, the injection sleeve is connected to the metering mechanism by the first threaded connection, and the metering mechanism is positioned to provide relative rotation and is axially fixed relative to the housing. At that, the injection apparatus comprises a dosing piston, which is connected to the control button without the possibility of relative rotation and to the metering mechanism via the second threaded connection, a plug is located within the reservoir, to which the metering piston of the injection unit adjoins, the dosing piston has a piston disc which is adjacent to the plug and the piston rod connected to the piston disk with the possibility of rotation. In this case, the piston rod is connected to the control button guide by means of the telescopic part without the possibility of relative rotation, at that, the telescopic part is connected to both the guide portion of the metering piston and the button guide without the possibility of relative rotation, the control button guide is spaced from the piston rod, if the maximum dose is selected, and this distance is covered by the telescopic part.

EFFECT: invention extends the product range of injection apparatus with housings where the receiving device for the reservoir with injected fluid, and the control button are envisaged.

17 cl, 43 dwg