Adjustable Guitar Neck Joint for Precise String Action Reset

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Solution Overview

Problem

The neck of a stringed instrument, such as a guitar, tends to misalign over time due to years of string tension, causing the strings to raise off the fingerboard and making the instrument unplayable, requiring professional disassembly and precise neck resets.

Innovation Solution

An apparatus and method that allows for adjusting the angle between the neck and body of a guitar without disassembly, using a pivot and adjustable fasteners to change the neck's angle relative to the body, allowing for easy and precise string height adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If traditional neck reset methods are used (unfastening bolts and precision spacers or steaming glue-joints), then the neck angle can be corrected, but the process becomes complex and requires professional disassembly

Engineering Contradiction:
Improveneck angle correction precisionVSAvoiddisassembly and reset process complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent introduces a dynamic adjustment mechanism that allows the neck angle to be changed without disassembly. The system uses an adjustable component (such as a wedge or screw mechanism) that can be modified in real-time to change the neck angle, transforming a static, fixed-angle neck into a dynamically adjustable one. This resolves the contradiction by enabling precision correction without complex disassembly procedures.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent enables the guitar owner to perform neck angle adjustment themselves through a user-friendly mechanism. The self-adjustment feature eliminates the need for professional luthiers to disassemble and reset the neck, making the precision correction accessible to ordinary users. This resolves the contradiction by simplifying the complex professional process into a self-service operation.

Inventive Principle:
Principle #25Self-service

2Ease of operation

If the neck is removed and reset to correct string height, then the playing action is improved, but the instrument requires professional intervention and disassembly

Engineering Contradiction:
Improvestring depression easeVSAvoidneck reset accessibility
Core Design Contradiction:
Ease of operationVSEase of repair

Solution Approach 1:

The patent implements a dynamic adjustment mechanism that allows the neck angle to be modified in-situ without removal. This enables users to adjust the string action (height) by changing the neck angle through a simple mechanism, making repair as easy as turning an adjustment screw or wedge. This resolves the contradiction by making both operation and repair equally accessible to users.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent transforms neck reset from a professional-only repair into a self-service operation. The adjustment mechanism is designed to be user-friendly, allowing guitar owners to correct their own string action problems without needing to take the instrument to a professional. This resolves the contradiction by making repair as accessible as regular playing maintenance.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If professional neck reset is performed, then correct neck geometry is restored, but the process is time-consuming and expensive

Engineering Contradiction:
Improveneck geometry accuracyVSAvoidneck reset time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent uses a dynamic adjustment mechanism that allows rapid modification of neck angle without the time-consuming disassembly and resetting process. The mechanism can be adjusted in minutes rather than hours, and certainly without the days required for traditional professional neck resets. This resolves the contradiction by achieving precision correction in a fraction of the traditional time.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent enables users to perform precision neck geometry correction themselves without professional intervention. This eliminates both the time and cost of professional service while maintaining accuracy through the designed adjustment mechanism. This resolves the contradiction by making precision repair fast, cheap, and accessible to users.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4648042A1Guitar with neck setting feature
Publication Date: 2025.11.12 TAYLOR LISTUG INC
  • EP4648042A1 patent drawingFigure 1~2
  • EP4648042A1 patent drawingFigure 3
  • EP4648042A1 patent drawingFigure 4

AI summary

A method and apparatus for adjusting the neck of a guitar having a body, a neck with a fret board formed thereon, wherein an underside of the fret board includes an unsupported section and adjustable means between the body and neck whereby an angle therebetween is adjustable.