FIELD: medicine.SUBSTANCE: invention refers to medical equipment, namely to a disposable device for injections. A disposable injector with a body wherein or whereon there are respective, at least widely separated at least one mechanical spring-restrained electric storage, at least one cylinder-piston assembly at least intermittently filled with an active substance, at least one piston actuating plunger, and at least one starter unit. At least one piston actuating plunger is arranged between the spring-restrained electric storage and the piston of the cylinder-piston assembly. At least one spring-restrained electric storage comprises at least one pre-loaded spring element. At least one spring-loaded piston actuating plunger has a plunger disc supporting the spring-restrained electric storage. At least one spring-loaded piston actuating plunger on the plunger disc rests on the body through at least one support bar. A separate support bar is mould onto one end of the body and represents an elastic bending beam. At least one support bar has a cam on its free end. Each separate support bar together with the plunger disc forms a wedge mechanism within the contact area pushing the respective support bar radially outwards. The piston actuating plunger on its end surface facing from the spring element has at least spaced straight wedge surfaces or spaced separate surfaces in the form of a side surface of a truncated cone. A starter unit comprises at least one starter element build on the body. At least one support bar interacts with at least one starter element. At least one locked support bar adjoins to at least one starter element and presses it radially outwards. The starter element is shaped as a sliding sleeve movable along the external surface of the body. The starter element which is a part of at least one starter unit is moved to release the piston actuating plunger with no supporting action provided in the release position.EFFECT: reliable storage and functioning of
