Keyboard Key Assembly Capstan Screw Adjustment Mechanism
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Solution Overview
Problem
Existing keyboard instruments face deviations in touch feeling adjustments due to environmental changes and aging, which affect the reliability and consistency of key performance.
Innovation Solution
The design incorporates a capstan screw with a hole part and opening part arrangement that supports the capstan, allowing for reduced axial movement and maintaining the key's width, thereby stabilizing the touch feeling by minimizing the impact of environmental and aging changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capstan screw height is adjusted to maintain touch feeling, then the touch feeling consistency is improved, but the structural complexity increases due to the hole part and opening part arrangement
Solution Approach 1:
The key body is segmented into multiple functional parts: the hole part for capstan screw insertion, the opening part for width maintenance, and the capstan screw adjustment mechanism. This segmentation allows each part to perform its specific function independently, enabling touch feeling adjustment while maintaining structural integrity.
Solution Approach 2:
The capstan screw is nested within the hole part of the key body, and the opening part surrounds the capstan screw. This nested arrangement allows the adjustment mechanism to be integrated within the key structure itself, reducing overall complexity while maintaining the required functionality for touch feeling consistency.
2Stability of the object's composition
If the key structure is made more rigid to maintain width, then the structural stability is improved, but the ease of manufacture deteriorates due to the complex opening part and hole part arrangement
Solution Approach 1:
The hole part and opening part are pre-formed in the key body during manufacturing, with the opening part designed to maintain width and the hole part positioned to accommodate the capstan screw. This preliminary structuring ensures that the key maintains its width and stability while the capstan screw can be easily inserted and adjusted without requiring complex post-manufacturing operations.
3Adaptability or versatility
If the capstan screw is allowed to move axially for adjustment, then the adaptability is improved, but the reliability deteriorates due to deviations from environmental changes and aging
Solution Approach 1:
The hole part is designed with specific local qualities: it provides enough axial movement space for capstan screw adjustment during installation and environmental changes, but its dimensions and positioning are precisely controlled to prevent excessive movement. The opening part similarly provides localized width maintenance while allowing the necessary adjustment range. This localized quality control ensures the capstan screw can adjust for adaptability while maintaining adjustment stability.
Data Source
AI summary
A key assembly includes a capstan and a key. The key includes an upper surface, a hole part having a first inner side surface supporting the capstan, and an opening part arranged between the upper surface and the hole part, the opening part having a second inner side surface surrounding the capstan.