Stringed Musical Instruments TRIZ Cases

See how a music stand uses nested projecting and recessed members through a plate to securely h

See how a pivoting tip on a retail peg hook prevents simultaneous product removal to deter thef

See how a telescopic frame with threaded-rod and gear transmission enables height adjustment fo

See how a footed sheet music holder mounts externally on the piano fallboard to display music w

A recessed catching structure lets a support bar set multiple music stand angles while reducing hinge complexity, cost, and breakage.

Pivotal vertical supports and sliding rear legs let the stand fold compactly for transport while maintaining stable support for tablets and other objects.

An eccentric compound gear reducer improves tuning precision and stability while preventing backdrive and speeding string replacement.

Abrasive file elements paired with a non-abrasive depth stop restore rounded fret contours while maintaining fret height and pitch accuracy.

Using two winding materials with different mechanical properties, this string balances resonance, damping, and playability across wide frequency ranges.

By limiting screw diameter and effective engagement depth in wood, this fastening structure suppresses loosening from moisture-driven expansion and shrinkage.

A small-diameter screw and short engagement distance help keyboard wood joints resist moisture-driven expansion, contraction, and loosening.

A rounded diamond-coated nut file forms string slots that cradle strings accurately, improving alignment, height control, and sound quality.

Gravity-driven self-locking brackets let a foldable musical instrument stand hold instruments securely while still collapsing for storage.

Four integral support posts shift molding shrinkage away from the sleeve, keeping the bushing bore circular for quiet, durable piano action rotation.

Different bar segments match each string’s tension to keep chord pitch changes uniform and prevent unintended string movement.

Different-sized bar segments match each string's tension to deliver uniform vibrato across chords while preventing unintended rotation.

A finger-engaging frog and loop keep the bow secured off-string, enabling fast shifts between bowing and plucking while simplifying re-hairing.

Abrasive and non-abrasive file surfaces restore rounded fret contours while preserving fret height and preventing excess material removal.

A rotating pick assembly and tether let one thumb-worn pick switch between thumbpick and flat-pick positions for more versatile guitar playing.

Pivoting, tiered press feet conform to compound or conical fingerboard radii to seat frets evenly and reduce deformation and rework.

A thin-walled hollow sleeve buckles during caulking to secure a lead-free keyboard weight without cracking the key embedding hole.

An adhesive pad spaces two different-gauge picks for sequential string contact, expanding tonal variety in guitar strumming.

A flexible ring and tether keep the guitar pick attached to the finger, preventing drops while allowing quick switching to finger strumming.

A cord-linked thumb ring and flat pick enable fast switching between thumb and flat picking while reducing dropped or lost picks.

A rotatable pressing surface turns sliding friction into rolling contact, cutting string noise and easing finger strain during slide playing.

Embedded metal rod and threaded insert let a hardwood Tune-o-Matic saddle resist string pressure while preserving wood tone and string adjustment.

A plunger and force sensor automate piano key touchweight measurement, improving precision while reducing time and user error.

A multi-function connector joins the keyboard, pedal frame, legs, and span member to keep the instrument set compact, stable, and easy to use.

Thin-walled fingertip coverings with curved bands, a V-relief, and nano-coating improve slide control while preserving natural finger movement.

A monolithic finger loop and plectrum loop hold the pick at a fixed angle to reduce slipping, shifting, and loss of control.

Dual style tips and an inverted V resonance chamber boost string vibration for brighter tone and sharper attack without electronics.

Ribs and insert molding secure keyboard key weights while allowing easier removal for maintenance, disposal, and precise positioning.