Pianos TRIZ Cases
- Grand Piano Music Rack Slide-On Mounting to Reduce Alignment Damage
See how rear-end placement and rearward sliding eliminate protrusion-groove insertion, reducing
- Acoustic Resonance Transducer Tuning for Piano Overtone Reduction
Flexible resonance transducers tune piano vibrations to amplify fundamental tones and suppress disturbing overtones for clearer sound.
- Acoustic Resonance Transducer Layout for Clearer Piano Fundamental Tones
Slidable resonance elements on a flexible suspension boost piano fundamental tones while suppressing disturbing overtone transfer.
- Modular Upright Piano Hammer Return Spring Rail With Adjustable Tension
Adjustable spring compartments and modular rail sections simplify upright piano assembly, repair, and hammer return tuning.
- Lightweight Stringed Keyboard Structure for Portable Acoustic Pianos
A steel-based sandwich sound-body and separable upright action cut piano weight and transport space while preserving acoustic sound quality.
- Grand Piano Soundboard With Diagonal Grooves And Bar Assembly
Diagonal grooves and a central bar assembly create cross-shaped tunnels on the soundboard, concentrating bass resonance centrally and treble at the edges.
- Upright Piano Acoustic Resonator Standing Wave Suppression
Pilaster-shaped acoustic resonators dissipate sound energy through urethane foam to suppress standing waves in upright piano internal spaces.
- Piano-Action Mechanical Connections Using Interlocking Concavity and Convexity Structures
A piano-action mechanism clips concave and convex components together using a flexible tape to enable relative movement through elastic deformation.
- Grand Piano Action Jack Weight Reduction via Wippen-Integrated Adjustment
Relocating the jack adjustment mechanism to the wippen reduces jack weight and inertial force, improving string striking repeatability.
- Upright Keyboard Instrument Pedal Rod Forward Arrangement
Forward pedal rod arrangement pivots damper rod rearward to press levers, reducing upright keyboard instrument depth.
- Grand Piano Rim Light Patterns via Semi-Transmitting Layer
A semi-light transmitting outer layer directs light through a transparent grand piano rim to create dynamic visual patterns.
- Upright Piano Action Spring Mechanism for Repeated Note Control
Second spring stops hammer rotation before string contact, enabling rapid repeated note playing.
- Piano Bearing Height Adjuster for Uneven Floor Stability
Height adjusters at piano bearing points enable independent leveling, ensuring uniform load distribution and tuning stability on uneven floors.
- Piano Sound Bridge Recesses for Vibration Transmission
Recesses on the sound bridge longitudinal edges reduce mass while maintaining structural stability, improving dynamic transmission by 18%.
- Segmented Piano String Frame with Under-String Strut
A segmented steel piano string frame replaces cast iron, using a welded strut under bass strings to maintain stiffness and open space.
- Angled Piano Hammer Cushion for Stable Rebound
Angled hammer cushions absorb motion energy to stabilize rebound positions, reducing collision noise from high-inertia impacts.
- Piano Soft Pedal Mechanism Eliminates Lost Motion Gaps
A piano key lift rail moves keys to maintain contact with wippen assemblies, eliminating lost motion gaps that degrade touch sensation.
- Grand Piano Topboard Reflection Preventer for Concert Lighting
A topboard reflection preventer covers the upper surfaces of a grand piano to block lighting glare.
- Piano Action Flat Contact Surfaces Let-Off Timing
Planar contact between flat jack and regulating button surfaces increases frictional resistance, clarifying let-off timing while maintaining touch weight.
- Upright Piano Action Mechanism EPDM Cushion for Rapid Note Repetition
An upright piano action mechanism employs a long EPDM rubber cushion member to mediate jack movement, resolving idle strikes during rapid note repetition.
- Upright Piano Action Unit Return Accelerator Mechanism
A return accelerator mechanism adds elastic force to the whippen assembly of an upright piano action unit.
- Piano Soft Pedal Linkage Eliminates Lost Motion
A piano soft pedal system coordinates a hammer rest rail and a rigid key lift rail to eliminate lost motion gaps between the hammer and wippen assemblies.