An electric oscillating drive with at least one oscillating
system (1), which is driven in an oscillating manner by an
actuator, especially a piezo
actuator (2) or an oscillating armature
magnet generating periodic force pulses with a small motion amplitude with adapted
natural frequency in a preset plane (31). At least one oscillating arm (30′) performing oscillating motions has a resonant
mass (55′) and with a balance arm (60′), which is in mechanical driving connection with a working member (7) of a working device, especially of a pump (3), which working member is to be driven in an oscillating manner. The oscillating arm (30, 30′) is fastened to two levers of unequal length, namely a
control arm (32′) and a driving lever (33′). At least one of these two levers, especially the
control arm (32′), is flexurally elastic at least in some sections. Its end not connected to the oscillating arm (30′) is immovably connected to a frame part (45, 62), in which the
actuator (2) is mounted, at a point located remotely from the oscillating arm (30′). The driving lever (33′) is in a motion-transmitting connection with the actuator (2) in such a way that the force pulses of the actuator (2) are sent to the oscillating arm (30′) to generate pendular oscillating motions in a direction that extends at least approximately in parallel to the direction of extension thereof in the inoperative position.