Disposable injector with at least one support rod

A disposable injector comprising:

• a housing (10), in which or on which
• respectively at least in certain areas
• at least one mechanical spring-energy storage (50), at least one cylinder-piston unit (100) which can be filled at least occasionally with active ingredient, at least one piston-actuating plunger (60) and at least one actuating unit (80) are arranged,
• at least one piston-actuating plunger (60) is positioned between the spring-energy storage (50) and a piston (111) of the cylinder-piston unit (100),
• at least one spring-energy storage (50) includes at least one pre-stressed spring-loaded element,
• the at least one spring-loaded piston-actuating plunger (60) has a plunger disc (73) for supporting the spring-energy storage (50)
• the at least one spring-loaded piston-actuating plunger (60) on the plunger disc (73) is supported on the housing (10) via at least one support rod (21),
• the at least one support rod (21) is formed respectively on the housing (10) being affixed at only one end thereof and the at least one support rod (21) being an elastic flexional beam (28), the at least one support rod (21) includes a cam (22) at the free end of the rod (21),
• each of the at least one individual support rods (21) forms a wedge gear combination with the plunger disc (73) at a contact zone, the wedge gear combination operatively exerts force on the respective support rod (21) in a radially outward direction,
• the actuating unit (80) includes at least one actuating element (82) with the at least one actuating element (82) mounted on the housing (10), the at least one support rod (21) in operational arrangement with the at least one actuating element (82), in a locked engagement position (8) the at least one support rod (21) bears on, and forces radially outwards the at least one actuating element (82),
• whereby the actuating element (82), as part of the at least one actuating unit (80), can be brought by displacement into an actuating position (9) that releases the piston-actuating plunger (60) and has no supporting action.