Automatic Musical Instruments TRIZ Cases

Random-pitch wind chimes are replaced by a wind-powered barrel and comb that deliver consistent melodies through interchangeable chime units.

Segmenting the main body from the comb member reduces device size while allowing easy song changes without replacing the entire mechanism.

Segmented drive units position solenoids above and circuit boards below the key bed, eliminating leg block interference during installation.

Electromechanical playing device uses segmented actuators to press strings against a fretboard for automated note generation.

Dual sensors detect separation between keys and plungers, enabling real-time feedback control that prevents operational disharmony and impact noise.

A helical sheet music box uses a star wheel to pluck vibration valves for continuous audio output.

Paired reed blades propagate longitudinal vibration to enhance acoustic intensity in compact designs.

Digital-to-analog converters generate simulated signals to calibrate ultrasonic flow meter transmitters independently of physical fluid flow.

A music box pause mechanism uses a stopper member to restrict clockwork spring rotation for playback control.

Motor-driven cam assemblies fret strings along a guide rail while solenoids actuate picks, reducing mechanical noise and wear on the instrument.

Variable gain tables prevent oscillations and double strikes when the soft pedal reduces hammer stroke load.

A drive control device adjusts striking member timing to simulate muting in auto-playing pianos.