Compressed Wood Keyboard Keys Density Gradient
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Solution Overview
Problem
Conventional wood keys in keyboard instruments lack durability and woody characteristics, often requiring surface treatments that impair their natural appearance.
Innovation Solution
The use of compressed wood for key-depression surfaces with varying density distributions, allowing for a natural woody texture and durability without surface treatments, and enabling easy visual distinction between white and black keys through controlled compression molding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface treatment such as painting is applied to wood keys, then durability is improved, but woody characteristic is impaired
Solution Approach 1:
The invention changes the density parameter of wood through compression molding, creating a dense layer on the key-depression surface that provides durability while preserving the natural woody appearance. The compression ratio and pressure are controlled to achieve the desired balance between durability and aesthetic quality without applying surface treatments.
Solution Approach 2:
The invention creates a composite structure within the wood key itself, where a compressed high-density layer is formed on the surface while the interior remains as natural wood. This internal composite structure provides both durability from the compressed layer and woody characteristic from the natural wood grain, eliminating the need for external painting or coating.
2Reliability
If compressed wood is used for black keys, then durability and woody characteristic are improved, but manufacturing complexity increases
Solution Approach 1:
The invention applies compression molding only to specific regions of the wood key - specifically creating a dense layer on the key-depression surface and controlling density distribution in the second part. This localized quality enhancement provides durability where needed while keeping the manufacturing process simpler than full compression of the entire key structure.
Solution Approach 2:
The invention divides the wood key into different regions with different density characteristics - a compressed high-density surface layer and a less compressed interior. This segmentation allows the manufacturing process to focus compression on only the necessary areas, reducing overall manufacturing complexity while achieving the desired durability and aesthetic properties.
3Ease of manufacture
If uniform compression is applied to wood, then manufacturing simplicity is maintained, but natural woody texture is impaired
Solution Approach 1:
The invention applies different compression levels to different regions of the wood key. The first part (key-depression surface) receives high compression to create durability, while the second part receives controlled compression to maintain natural woody texture. This local quality differentiation preserves aesthetic quality while achieving manufacturing efficiency.
Solution Approach 2:
The invention strategically varies the compression parameter across different regions of the wood key. By controlling the compression ratio and pressure distribution, the invention creates a density gradient that maintains natural wood grain appearance in certain areas while providing enhanced durability in other areas, thus preserving woody texture without sacrificing manufacturing simplicity.
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
This approach provides keys with enhanced durability and a natural woody appearance, eliminating the need for surface treatments and ensuring safety and aesthetic quality in musical performance.
Implementation Method 1
the first part made of compressed wood includes at least a second part adapted to be positioned above upper surfaces of white keys of the keyboard instrument which are in a non-key depression state, and a compressed density in a vertical direction in the second part is higher toward rearward from a front end of the second part
Data Source
AI summary
A key having a key-depression surface with a woody characteristic and durability without the need of a surface treatment and capable of being formed from a simple-shaped uncompressed wood. A key for use as a black key includes a resin part and a compressed wood part secured at its lower surface to an upper surface of the resin part. The compressed wood part is used to constitute a portion of a key top including an upper surface and positioned above an upper surface of white keys which are in a non-key-depression state. The compressed wood part is obtained by compression molding of unprocessed wood. The compressed density in the vertical direction in the compressed wood part is higher toward rearward from a front end of the compressed wood part.