PRESET LIQUID DRUG DOSE INJECTOR (VERSIONS) Russian patent published in 2016 - IPC A61M5/315 A61M5/24 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medical equipment, namely to devices for injection of a preset dose of a liquid drug, e.g. for injection of equal, fixed doses of a medicinal preparation or for injection of a limited amount of various doses of the medicinal preparation. The injector comprises a container of variable volume having an outlet, dose setting unit, injection unit, driving element, guide unit and power supply. The injection unit provides injecting a preset dose and comprises a rod toothed on at least one piece and configured to reduce a container volume. The driving element is configured movable in relation to the rod when setting a dose and transmitting a driving force onto the rod when injecting a medicinal preparation, and comprising a mating component for mating with the above rod. The guide is configured to rout the driving element and/or above rod. The power supply is functionally connected to the dose setting unit and injection unit and applicable to store and release power to actuate propulsion and rotation. When actuating the dose setting unit for the purpose of setting a dose, the mating component extends behind a tooth on the rod by means of a combined propulsion/rotation. In the second version, the injector also comprises a push button functionally connected to the dose setting unit and injection unit and configured axially movable between a first position with respect to the set dose, and a second position with respect to the actuation of the injection unit for the injection of the set dose. The actuation of the dose setting unit for the purpose of setting the dose effects as follows: the mating component extends behind the tooth on the above propulsion/rotation; the power supply accumulated power for the propulsion only released when the injection unit comes into action, and the push button switches from the second to first position.

EFFECT: increasing reliability and operational reproducibility of the above injector.

16 cl, 32 dwg