Electronic Keyboard Rib Layout for Clear Key-Gap Sound Paths
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Solution Overview
Problem
Existing electronic keyboard instruments face challenges in securing a clear sound path from the speakers to the key gaps while maintaining structural reinforcement, often resulting in compromised sound quality and reinforcement effectiveness.
Innovation Solution
The design incorporates multiple ribs between the keyboard and sound emitting units with openings, allowing a communication passage to extend from the sound emitting unit to the key gaps, ensuring a clear sound path without interference, and providing uniform reinforcement by aligning ribs with individual keys and hammers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple reinforcement ribs are formed individually between white keys to prevent interference between mass elements and ribs, then structural reinforcement is improved, but sound path clarity deteriorates
Solution Approach 1:
The reinforcement structure is segmented into multiple individual ribs positioned between adjacent white keys, allowing each rib to provide localized reinforcement without creating continuous interference with the sound path. This segmentation enables the mass elements to swing freely while maintaining structural strength where needed.
Solution Approach 2:
Different regions of the keyboard structure are given different properties: reinforcement ribs are provided in specific locations between white keys where structural strength is needed, while leaving other areas open for sound propagation. This local differentiation allows simultaneous optimization of both reinforcement and sound path clarity.
2Strength
If reinforcement ribs are added to maintain structural integrity, then strength is improved, but sound propagation efficiency deteriorates
Solution Approach 1:
The reinforcement system is divided into discrete ribs positioned strategically between white keys rather than using a continuous structure. This segmentation allows sound waves to propagate through the gaps between ribs while still providing structural support at critical locations.
Solution Approach 2:
The gaps between the reinforcement ribs act as intermediaries that allow sound energy to pass through the structure. These spaces serve as pathways for sound propagation while the ribs themselves maintain structural integrity, creating a balanced system where both functions coexist.
Data Source
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AI summary
An electronic keyboard instrument (1) includes a casing (30), a keyboard (20) having multiple keys (22) which are provided to be exposed from the casing (30), a sound emitting unit (80) provided inside the casing (30), and multiple ribs (71, 72) provided between the keyboard (20) and the sound emitting unit(80) at a position corresponding to at least one of the multiple keys (22), and at least a part of spaces between the multiple ribs ((71, 72) has an opening (70A), and a communication passage (P) is provided in the casing (30) in such a manner as to extend from the sound emitting unit (80) to reach a key gap between the multiple keys (22) by way of the opening(70A).