Dynamic Fret Mechanism for Ergonomic Stringed Instrument Play
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Solution Overview
Problem
Existing cord-type music instruments are not optimized for ease of use and accessibility, particularly for individuals with disabilities, as they require manual dexterity and can lead to fatigue and injuries like carpal tunnel syndrome.
Innovation Solution
A mechanical device integrated into the fret board of the instrument, featuring a π-shaped rider mechanism with an elastic element and bridge, allowing for ergonomic thumb operation to facilitate dynamic fretting and reduce finger fatigue, while maintaining the instrument's aesthetic and usability for various types of stringed instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fixed frets are used, then the instrument structure is simple, but the ease of operation deteriorates due to required manual dexterity and finger fatigue
Solution Approach 1:
The patent applies the dynamics principle by replacing static fixed frets with dynamic movable frets that can be automatically positioned. The rider means (4) with vertical elements (4b) that cross the fret board and connect to bridge elements (6) allow the frets to move vertically in response to string tension and playing pressure, eliminating the need for manual finger positioning while maintaining proper fret positioning for accurate intonation.
2Object-affected harmful factors
If manual finger pressure is applied, then the fretting mechanism is simple, but harmful factors increase due to fatigue and carpal tunnel syndrome
Solution Approach 1:
The patent implements the self-service principle through the automatic fret positioning mechanism. The bridge elements (6) connected via elastic means (8) to the rider means (4) automatically adjust fret positions in response to string tension and playing forces. This self-adjusting system eliminates the need for manual finger pressure to maintain fret positioning, thereby preventing finger fatigue and carpal tunnel syndrome while requiring only minimal activating pressure from the user.
3Ease of operation
If movable frets are introduced, then ease of operation improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses elastic means (8) as intermediaries between the bridge elements (6) and the rider means (4). These elastic elements provide a compliant connection that allows for precise positioning while accommodating manufacturing tolerances. The elastic connection enables smooth, controlled movement of the rider means without requiring extremely tight manufacturing tolerances, thus maintaining ergonomic playability while being feasible to manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables ergonomic play, reduces finger fatigue, and allows disabled individuals to play autonomously by optimizing the fretting mechanism, ensuring the instrument's traditional appearance and functionality are preserved.
Implementation Method 1
at least one elastic means 8, equipped with a first end connected to the bridge element 6, and with a second end strictly connected to a room, preferably a cylindrical section, obtained inside the fret board 9
Data Source
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AI summary
A mechanical device (10) is described, integrated in a handle (9) of a cord-type music instrument as replacement of a key (3) adapted to cross the handle (9) from the front surface to the rear surface of the handle (9); the mechanical device (10) comprises: a bridge element (6) arranged on the rear surface of the handle (9); a rider means (4), adapted to vertically cross the handle (9) of the cord-type music instrument and to be connected with the bridge element (6); an elastic means (8), equipped with a first end connected to the bridge element (6), and with a second end strictly connected to at least one room obtained in the handle (9).