Tone Control Member for Acoustic Guitar Body Stability

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Solution Overview

Problem

Conventional guitars are prone to body deformation due to string tension and environmental factors, leading to changes in sound quality, and lack adjustable tone control and neck stability.

Innovation Solution

A tone-controlled acoustic guitar design featuring a tone control member with expandable and contractable components, a resonance system, and a weight adding member on the head to maintain sound balance and prevent neck bending, allowing for manual or automatic tone adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the guitar body is left without support structure, then the structure is simple and easy to manufacture, but the body deforms due to string tension and environmental factors causing sound quality changes

Engineering Contradiction:
Improvebody stabilityVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

A tone control member is introduced as an intermediary component between the top plate and bottom plate of the guitar body. This member includes a support portion with contacting surfaces that touch both plates, and a control portion that extends toward the sound hole. The tone control member mediates the structural relationship between the top and bottom plates, providing support and preventing deformation while maintaining acoustic functionality.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The tone control member is designed with adjustable height control means that allow the control portion to be expanded and contracted. This dynamic adjustment capability enables the tone control member to adapt to different playing conditions and preferences, allowing fine-tuning of the body's structural support while preventing deformation.

Inventive Principle:
Principle #15Dynamics

2Reliability

If the neck is left without additional weight, then the structure is simple, but the neck bends due to string tension affecting sound balance

Engineering Contradiction:
Improveneck stabilityVSAvoidhead structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

A weight adding member is attached to the head of the guitar to counterbalance the downward force exerted by the strings on the neck. This additional weight acts as a counterforce that prevents the neck from bending under string tension, thereby maintaining proper neck stability and sound balance between high and low frets.

Inventive Principle:
Principle #8Anti-weight (Counterweight)

3Adaptability or versatility

If no tone control mechanism is added, then the device is simple, but the tone fields cannot be adjusted according to player preference

Engineering Contradiction:
Improvetone adjustabilityVSAvoidcontrol mechanism complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The tone control member incorporates height control means with expandable and contractable mechanisms that allow the control portion to be dynamically adjusted in height. This enables players to fine-tune the tone fields according to their preferences by modifying the position of the control portion relative to the sound hole, while the automatic adjustment capability reduces the need for complex manual control mechanisms.

Inventive Principle:
Principle #15Dynamics

4Reliability

If the top plate and bottom plate are left without active support, then the manufacturing process is simple, but the plates deform due to humidity and air flow causing sound changes

Engineering Contradiction:
Improvesound consistencyVSAvoidsupport structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The tone control member serves as an intermediary support structure between the top plate and bottom plate. The support portion with contacting surfaces provides active support to both plates, preventing deformation caused by humidity and air flow during playing. This intermediary structure maintains the structural integrity of the body while allowing the plates to resonate properly for consistent sound production.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Prevents body deformation, fine-tunes tone fields according to player preference, enhances sound balance between high and low frets, and extends sound duration by stabilizing the neck against string tension.

Implementation Method 1

a resonance body having a given internal space formed therein; a resonance transmitter whose a portion is inserted into the resonance body

Methodology Applied
Scientific EffectResonance: Resonance

Implementation Method 2

the position adjuster moves the resonance transmitter in a horizontal direction by using elasticity thereof

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 3

the height control means has a screw moving way so that the contact member segmented symmetrically into two parts is expanded and contracted

Methodology Applied
Scientific EffectScrew mechanism: Screw

Data Source

PatentUS9747873B2Tone control member and tone-controlled functional acoustic guitar
Publication Date: 2017.08.29 GOPHER WOOD
  • US9747873B2 patent drawing
  • US9747873B2 patent drawing
  • US9747873B2 patent drawing

AI summary

The present invention relates to a tone-controlled functional acoustic guitar that prevents a body from being deformed to avoid the changes in sound, increases sound transmission, finely adjusts tone fields in accordance with a player or user's selection, and has a specific structure on a head thereof to suppress bending on a neck caused by the tension of strings. According to the present invention, the tone-controlled functional acoustic guitar includes: a body having a top plate, a bottom plate and a side plate connecting the top plate and the bottom plate with each other; a neck fixed to one side of the body; a head disposed at the end portion of the neck; and a tone control member detachably mounted at the inside of the body in such a manner as to be controlled in length to support a space between the top plate and the bottom plate of the body, wherein the tone control member includes: a contacting and moving member; and height control means expandably and contractably moving the contacting and moving member.