Additive Manufactured Violin Tailpiece with Eccentric String Bore Exits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mass-produced violins often lack the quality and sound characteristics of handmade instruments, with issues such as uneven string spacing, improper resonance, and structural instability due to additive manufacturing techniques.
Innovation Solution
A string instrument design featuring a body and neck produced via additive manufacturing from polymeric materials, with a unique tailpiece and bridge configuration that includes tubular string bores with varying cross-sectional areas and a top nut height equation to optimize string tension and resonance, along with a central bore for enhanced resonance and a tuner box with adjustable tuners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additive manufacturing is used to mass-produce violins, then production cost and productivity are improved, but manufacturing precision and structural stability deteriorate
Solution Approach 1:
The patent modifies the geometric parameters of the tailpiece by introducing an eccentric axis of rotation that is offset from the centerline. This parameter change enables the string bore exits to be positioned at precise, uniform intervals through rotational symmetry, achieving manufacturing precision comparable to handcrafted instruments while maintaining additive manufacturing efficiency.
Solution Approach 2:
The tailpiece employs an asymmetric design where the string bore exits are arranged asymmetrically relative to the body's centerline, yet symmetrically relative to each other through the eccentric rotation mechanism. This asymmetric-asymmetric configuration allows for precise string spacing while accommodating the constraints of additive manufacturing processes.
2Ease of manufacture
If additive manufacturing is used to mass-produce violins, then production cost is reduced, but sound quality and resonance deteriorate
Solution Approach 1:
The patent optimizes the geometric parameters of the string bores, including their varying cross-sectional areas and the eccentric positioning of exits, to enhance acoustic performance. These parameter optimizations ensure that the additive manufactured tailpiece produces superior sound quality and resonance characteristics comparable to traditional handcrafted violins.
Solution Approach 2:
The tailpiece features non-uniform cross-sectional areas along the string bore length, with different diameters at various locations. This local quality variation optimizes the acoustic properties by creating specific resonance characteristics and improving string vibration transmission, thereby enhancing overall sound quality while maintaining cost-effective mass production.
3Ease of manufacture
If conventional tailpiece design is used, then ease of manufacture is maintained, but string tension and structural stability deteriorate
Solution Approach 1:
The patent introduces an eccentric axis of rotation with a specific offset distance from the tailpiece centerline. This parameter change transforms the conventional symmetric tailpiece design into an asymmetric configuration that provides superior structural stability by optimizing the distribution of string tension forces and improving the mechanical rigidity of the tailpiece structure.
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
The design improves sound quality and stability by ensuring uniform string spacing, optimal resonance, and reduced tension, addressing the limitations of additive manufacturing in violin production.
Implementation Method 1
A string instrument design featuring a body and neck produced via additive manufacturing from polymeric materials, with a unique tailpiece and bridge configuration that includes tubular string bores with varying cross-sectional areas and a top nut height equation to optimize string tension and resonance
Implementation Method 2
along with a central bore for enhanced resonance
Data Source
AI summary
A string instrument has a neck attached to a body and extending outwardly therefrom. The body has a top plate joined to a bottom plate by a continuous rib forming an interior volume therebetween. A tailpiece is joined to the body. The tailpiece has tubular string bores. Each string bore has an entrance for receiving a string therein and an exit from which the string emerges and extends to the neck. At least one the exits has a cross-sectional shape in which a length of a major axis of the cross-sectional shape is greater than a length of a minor axis of the cross-sectional shape.