Keyboard Apparatus Rotating Section Mimics Acoustic Piano Balance Pin
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Solution Overview
Problem
Electronic keyboard instruments fail to replicate the touch feeling of acoustic pianos due to differences in key rotation center positioning and support mechanisms.
Innovation Solution
A keyboard apparatus with a rotating section comprising a rod-like flexible member and supporting sections that allows the key to rotate with respect to a frame, mimicking the balance pin support of acoustic pianos, while maintaining flexibility and absorbing deformation influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a thin plate structure is used for key rotation, then the device complexity is reduced, but the manufacturing precision and positional accuracy of the key rotation center deteriorate
Solution Approach 1:
The key support structure is segmented into multiple functional components: a rotation center positioning mechanism with precise geometric constraints, a flexible section for rotational movement, and a deformation absorption section. This segmentation allows each component to specialize in its function, achieving high positioning accuracy without overall structural complexity.
Solution Approach 2:
An intermediary deformation absorption section is introduced between the rigid key support and the flexible rotation mechanism. This intermediary component absorbs dimensional variations and deformation from the thin plate structure, preventing them from affecting the key rotation center positioning accuracy.
2Ease of operation
If the key structure is made flexible to allow rotation, then the touch feeling is improved, but the stability and positional accuracy deteriorate
Solution Approach 1:
Different parts of the key structure have different mechanical properties: the key support and rotation center positioning mechanism are rigid for stability, the flexible section allows controlled rotation for touch feeling, and the deformation absorption section provides localized compliance. This local differentiation of rigidity and flexibility resolves the contradiction between stability and ease of operation.
Solution Approach 2:
The key structure transitions from a static rigid structure to a dynamic system with controlled flexibility. The flexible section enables the key to rotate and return dynamically, replicating the acoustic piano touch feeling, while the rigid positioning mechanism maintains positional accuracy throughout the motion.
3Manufacturing precision
If dimensional variations of the thin plate are reduced, then the manufacturing precision is improved, but the flexibility and deformation absorption capability deteriorate
Solution Approach 1:
The structure is divided into rigid precision components and flexible adaptive components. The rigid sections maintain dimensional accuracy for positioning, while the flexible sections provide adaptability and deformation absorption, allowing each segment to optimize its specific function.
Solution Approach 2:
A deformation absorption section serves as an intermediary between precision components and flexible components. This intermediary absorbs dimensional variations and prevents them from propagating to affect the precision of the key rotation center positioning.
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
The solution effectively replicates the touch feeling of acoustic pianos by allowing key rotation and deformation, enhancing positional accuracy and reducing deformation influences, thus improving the overall playing experience.
Implementation Method 1
a flexible section supported by the key-side supporting section, having flexibility in at least an up-and-down direction, and configured to rotate the key with respect to the frame
Data Source
AI summary
A keyboard apparatus includes a key, a frame arranged below the key, a key-side supporting section connected to a member a positional relationship of which is fixed to the key and extending more downward than the member, and a flexible section supported by the key-side supporting section, having flexibility in at least an up-and-down direction, and configured to rotate the key with respect to the frame.