Keyboard Let-Off Mechanism With Movable Elastic Rail
Solution Overview
Problem
Existing digital keyboard instruments fail to accurately simulate the 'let-off' feeling, a crucial tactile feedback experienced in acoustic pianos, as the deformation of elastic parts on fixed rails does not adequately replicate the dynamic load changes during key depression.
Innovation Solution
A keyboard device with a let-off generator that includes an elastic deformer and a pressor, where the elastic deformer is integrated with an elastic hook on the transmitter or hammer member, and the pressor is positioned to elastically deform the deformer, creating a more realistic let-off sensation by altering the key depression load characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an elastic part is arranged on a fixed rail to simulate let-off feeling, then a clicking feeling can be generated, but the let-off feeling is not appropriately generated
Solution Approach 1:
The invention makes the rail itself movable rather than fixed, allowing the rail to elastically deform in response to hammer impact forces. This dynamic rail structure enables the generation of an appropriate let-off feeling by permitting controlled movement and deformation during key depression, resolving the issue of inadequate let-off simulation while maintaining reliable acoustic emulation.
2Device complexity
If a fixed rail with elastic part is used, then the structure is simple, but the key depression load characteristics do not match acoustic piano
Solution Approach 1:
The rail is designed with elastic properties and made movable to dynamically respond to varying hammer impact forces throughout the key depression stroke. This enables accurate reproduction of acoustic piano load characteristics - with higher forces at the beginning and reduced forces toward the end - while maintaining a relatively simple overall structure that integrates the elastic rail into the existing action mechanism.
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 generates a more appropriate let-off feeling by dynamically changing the key depression load, closely mimicking the tactile feedback of acoustic pianos, improving the simulation of the 'let-off' sensation compared to conventional techniques.
Implementation Method 1
an elastic deformer 47 which is arranged on the transmitter 10, and a pressor 48 which is arranged on the hammer member 11 and elastically deforms the elastic deformer 47
Data Source
Figure 1
Figure 2A~2B
Figure 3A~4D
AI summary
A keyboard device (1) includes at least one key (2) and an action mechanism (3) corresponding to the at least one key (2). The action mechanism (3) includes a transmitter (10) which moves in response to key depression to the at least one key (2), a hammer member (11) which operates, in response to movement of the transmitter, to apply a load to the depressed key, a first abutting part (48a) which is arranged on one of the hammer member and a member which the hammer member abuts, and an elastic part (47) which is arranged on another of the hammer member and the member which the hammer member abuts. At least one part (47a) of the elastic part (47) gets over the first abutting part (48a) in a process of deforming of the elastic part (47), thereby a let-off feeling is given to the depressed key.