Electronic Keyboard Tone Silencing via Dynamic Mass Body Position Control
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Solution Overview
Problem
Conventional electronic keyboard musical instruments face challenges in achieving natural tone silencing timing due to varying back checking states and key depression/release velocities, leading to inappropriate and delayed tone silencing.
Innovation Solution
An electronic keyboard musical instrument with a mass body that pivots between rest and end positions, utilizing a back check portion and position detecting mechanism to control tone silencing based on the time taken to pass through specific movement regions, allowing for dynamic adjustment of tone silencing timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform tone silencing position control is used, then the control structure is simple, but the tone silencing timing becomes inappropriate and delayed when back checking varies
Solution Approach 1:
The patent applies dynamics by making the tone silencing position variable rather than fixed. The controller dynamically adjusts the tone silencing position based on the detected hammer position and back checking state. When back checking is active, the tone silencing position is set to a position that accounts for the delayed hammer return, ensuring natural-sounding tone termination despite the varying mechanical state.
Solution Approach 2:
The patent implements feedback by using a position detection device to continuously monitor the hammer position and feed this information back to the controller. The controller uses this feedback to determine the back checking state and adjust the tone silencing position accordingly. This closed-loop feedback mechanism ensures accurate tone silencing timing regardless of variations in back checking.
2Ease of operation
If tone silencing is performed at a uniform position, then the control is simple, but the performer feels delayed and unnatural silencing when the hammer returns slowly due to back checking
Solution Approach 1:
The system transitions from a static, uniform tone silencing position to a dynamic, adaptive position. The controller continuously adjusts the tone silencing position based on real-time hammer position detection and back checking state determination, allowing the system to adapt to varying performance conditions while maintaining operational simplicity.
Solution Approach 2:
The patent changes the parameter of tone silencing position from a fixed value to a variable that depends on the back checking state. When back checking is detected, the system changes the tone silencing position parameter to compensate for the delayed hammer return, ensuring natural tone termination across different playing conditions without complicating the overall control structure.
3Reliability
If the hammer returns slowly due to significant back checking action, then the back checking works effectively, but the uniform tone silencing position causes delayed and awkward silencing
Solution Approach 1:
The system performs preliminary action by detecting the back checking state in advance and pre-adjusting the tone silencing position before the hammer completes its return. By using position detection and logical determination of the back checking state, the controller proactively sets an appropriate tone silencing position that compensates for the expected delayed hammer return, preventing timing issues before they occur.
Solution Approach 2:
The position detection device provides continuous feedback on the hammer position, allowing the controller to detect when the hammer is in the back checking region. This feedback enables the system to identify the back checking state and adjust the tone silencing position accordingly, ensuring that tone silencing occurs at the appropriate moment even when the hammer returns slowly due to effective back checking.
Data Source
AI summary
An electronic keyboard musical instrument, including: a key; a mass body driven by a depressed key for pivotally moving in a movement region between a rest position and an end position; a back check portion to back check the mass body; a position detecting portion to detect a position of the mass body; and a controller for controlling silencing of a tone, such that the currently generated tone is silenced when the mass body reaches a preset tone silencing position in its movement from the end position to the rest position, wherein the controller is configured to change the tone silencing position on the basis of respective times required for the mass body to pass through first and second sub regions of the movement region in the movement of the mass body, the second sub region being located nearer to the rest position than the first sub region.