Membrane oscillator (diaphragm oscillator) having a piezoelectric drive

摘要

In the case of membrane oscillators having a piezoelectric drive, a connection (A) in the form of a strip or wire must make contact with an electrode (E1) which is applied in the form of a layer on piezo ceramic (Pk). The new membrane oscillator is intended to take account of the increasingly more stringent requirements for the adhesive strength and the life of the means of making contact. The connection (A) is made contact with on a raised contact surface (Kf) which is arranged in the region of the node line (K1) of the oscillation, is preferably of annular shape and is constructed as local reinforcement of the electrode (E1). In addition to extending the life, the positioning of the connections (A) is simplified as a result of the contact surface (Kf) being able to be raised. The membrane oscillator is suitable for telephone membranes or piezo actuators of ink-mosaic printers (dot-matrix printers). <IMAGE>