Keyboard Pivot Member Multi-Angle Identification
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Solution Overview
Problem
The existing pivot mechanisms in electronic keyboard instruments face challenges in identifying the type of pivot member from multiple directions, leading to lower productivity and inspection efficiency due to small differences in weight mass between hammers corresponding to close pitches.
Innovation Solution
A pivot member design featuring a first identifier visually recognizable from the pivot-axis direction and a second identifier recognizable from both the pivot-axis and orthogonal directions, facilitating easy identification and assembly of pivot members corresponding to each key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If identifiers are provided only on the top surface of pivot members, then the structure remains simple, but the identifiers become visually unrecognizable when multiple keys are assembled to the support member
Solution Approach 1:
The patent applies dimensionality change by providing identifiers not only on the top surface but also on the side surfaces of the pivot member. This multi-dimensional placement ensures that identifiers remain visible from various angles, solving the problem of unrecognizable identifiers when multiple keys are assembled together.
2Manufacturing precision
If the mass difference between weights is made smaller to achieve finer pitch differentiation, then the acoustic piano touch feeling is improved, but it becomes more difficult to identify the weight corresponding to each key
Solution Approach 1:
The patent uses color changes as an identification method by providing identifiers with different colors or color patterns on the pivot members. This allows easy visual differentiation of weights even when mass differences are minimal, solving the identification difficulty while maintaining fine pitch differentiation.
Solution Approach 2:
The patent places identifiers on multiple surfaces (top and side surfaces) of the pivot member, creating a multi-dimensional identification system. This ensures that identifiers remain visible and distinguishable even when mass differences between weights are small, allowing easy key identification while maintaining precise pitch differentiation.
3Difficulty of detecting and measuring
If multiple identifiers are provided on different surfaces of the pivot member, then identification from multiple directions is enabled, but the manufacturing complexity increases
Solution Approach 1:
The patent segments the identifier placement into distinct locations (top surface and side surfaces) with specific functional assignments. This segmented approach allows for systematic manufacturing processes while ensuring identifiers are visible from multiple directions, balancing visibility improvement with manufacturing feasibility.
Data Source
AI summary
A pivot member includes: a first member configured to pivot about a pivot axis; and a second member having a connecting surface, at least a portion of which has a flat surface. The second member is disposed such that the flat surface and the first member are opposed to each other. The second member has at least one surface different from the flat surface. A first identifier and a second identifier are provided on the at least one surface. The first identifier is visually recognizable from a first direction orthogonal to the flat surface. The second identifier is visually recognizable from the first direction and from a second direction in which the first identifier is not visually recognizable.