Piano Support Assembly Merging Regulation for Stability
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Solution Overview
Problem
The complex assembly and adjustment of the action mechanism in acoustic pianos, particularly the support assembly, require many components and are time-consuming, making them difficult to manufacture and adjust accurately, which affects the touch feeling and operation stability.
Innovation Solution
A support assembly with a rotating support, repetition lever, and jack, where the repetition lever and jack have contact portions that regulate their rotation by making contact with a common regulating portion, simplifying the structure and reducing the number of components, allowing for easier adjustment and improved operation stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the support assembly uses multiple separate regulating components for the repetition lever and jack, then the regulation of each component can be independent, but the assembly complexity and adjustment time increase significantly
Solution Approach 1:
The patent combines the regulating portions for the repetition lever and jack into a single integrated component. The support assembly includes a support with a first regulating portion that contacts the repetition lever and a second regulating portion that contacts the jack, both integrated into the same support structure. This merging reduces the number of separate regulating components from multiple independent parts to a unified support assembly, simplifying assembly while maintaining independent regulation capability through the different contact points on the same support.
2Ease of manufacture
If the support assembly integrates multiple regulating functions into a single component, then the number of components is reduced and assembly is simplified, but the adjustment precision for each individual component may be compromised
Solution Approach 1:
The support integrates multiple regulating functions by providing distinct first and second regulating portions on the same component. The first regulating portion independently regulates the repetition lever through a first contact point, while the second regulating portion independently regulates the jack through a second contact point. This merging approach reduces component count and simplifies assembly while preserving adjustment precision through the separate, dedicated contact points for each regulated element.
Solution Approach 2:
The support serves multiple regulatory functions simultaneously by incorporating both the first regulating portion for the repetition lever and the second regulating portion for the jack. This multi-functional design allows a single support component to perform what previously required multiple separate regulating components, easing manufacturing and assembly while maintaining the precision needed for each individual regulation function through specialized contact points.
3Reliability
If the repetition lever and jack have separate regulating mechanisms, then each can be adjusted independently, but the overall operation stability and touch feeling consistency deteriorate
Solution Approach 1:
The support assembly merges the regulating mechanisms for the repetition lever and jack into a single integrated structure with distinct regulating portions. The first regulating portion contacts the repetition lever at a first contact point, while the second regulating portion contacts the jack at a second contact point. This integration improves operation stability and touch feeling consistency by ensuring coordinated regulation from a unified support, while the separate contact points maintain independent adjustability. The complexity is reduced by eliminating multiple separate regulating mechanisms.
Data Source
AI summary
A support assembly includes a support rotatable along a first surface with respect to a support rail, a repetition lever rotatable on the support, and a jack rotatable on the support and disposed to at least partially overlaps the repetition lever. The repetition lever includes a first contact portion which makes contact with a regulating portion which regulates rotation, the jack includes a second contact portion which makes contact with the regulating portion which regulates rotation, and the repetition lever and the jack are provided so that the first contact portion and the second contact portion overlap each other.