Keyboard Hammer Coil Alignment for Precise Key Displacement Sensing
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Solution Overview
Problem
Existing keyboard musical instruments face challenges in accurately setting the positional relationship between coils for precise detection of movable member displacement, leading to inaccuracies in generating detection signals.
Innovation Solution
A keyboard musical instrument design that includes a drive mechanism with a hammer shank, restricting member, and support members to precisely set the positional relationship between a first coil and a second coil, using a signal generator and support members fixed to a base member, enhancing the accuracy of detection signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the positional relationship between the first coil and the second coil is not precisely set, then the device complexity is reduced, but the measurement precision of movable member displacement deteriorates
Solution Approach 1:
The patent merges the first support member and second support member into a single integrated base member structure. This integration ensures that both the first coil and second coil are positioned relative to the same reference frame, eliminating positioning errors that would occur if they were independently mounted. The unified base member simplifies the overall structure while achieving precise coil alignment.
Solution Approach 2:
The patent incorporates positioning protrusions and corresponding positioning cavities that are pre-formed during manufacturing. These features establish the precise spatial relationship between coils before the device operates. The preliminary positioning structure ensures that when the device is assembled, the coils automatically achieve the correct relative position without requiring complex adjustment mechanisms.
2Manufacturing precision
If support members are fixed to separate bases, then the ease of manufacture is improved, but the manufacturing precision of coil positional relationship deteriorates
Solution Approach 1:
The patent combines multiple support members into a single base member structure. This integration allows both coils to be positioned and fixed simultaneously relative to the same reference surface, ensuring precise spatial relationships. The unified structure reduces the number of interfaces and alignment operations required during assembly.
Solution Approach 2:
The patent incorporates positioning protrusions and corresponding positioning cavities that are pre-formed during manufacturing. These features establish the precise spatial relationship between coils before the device operates. The preliminary positioning structure ensures that when the device is assembled, the coils automatically achieve the correct relative position without requiring complex adjustment mechanisms.
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 design allows for highly precise setting of the positional relationship between coils, resulting in improved detection accuracy and enhanced key feel, mimicking the experience of an acoustic keyboard.
Implementation Method 1
a second coil that generates a magnetic field
Implementation Method 2
the signal generator being configured to generate a detection signal based on a distance between the first coil and the second coil
Data Source
AI summary
A keyboard musical instrument has a drive mechanism that includes a hammer shank displaceable in conjunction with a key operation; a restricting member that is struck by the hammer shank as a result of displacement of the hammer shank; a first support member that supports the restricting member; a first coil mounted to the drive mechanism; a wired board; a signal generator, including a second coil that generates a magnetic field, mounted to the wired board, the signal generator being configured to generate a detection signal based on a distance between the first coil and the second coil; a second support member configured to support the wired board; and a base member. The first support member and the second support member are fixed to the base member.