Lever actuator comprising a longitudinal-effect electroexpansive transducer and designed to prevent actuation from degrading the actuator

摘要: A transducer (51) extended by an electroexpansive longitudinal effect, actuates a lever (77) through bendable plate (56). Preferably, the first arm (53) having end which provides fulcrum. Another (79) second (76) exterts power to lever. The plates are symmetrically disposed on both sides of axis. is differentially actuated arms. When such actuators combined into impact printer head, guide for printing elements carried respective levers preferably used in preventing from excessively excursing.