The present invention relates to an actuating device with an electromotive rotary drive, via which an actuating element can be driven rotatably about an axis of rotation between a first end position and a second end position and can be acted upon out of the first end position by a spring. The method includes generating a user model relating to a new application to be built. The sanitary tissue products within the cavity are configured to be dispensed through the opening. The structure ensures high performance and a long service life for the spark plug. The anode member is covered with an ionically-conductive covering material into which is bound an electrochemical activating agent at least partly covering the sacrificial anode member.