Stepped Key Layout for Ergonomic and Quiet Input
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Solution Overview
Problem
Existing key input devices do not effectively address the ergonomic needs of users, leading to discomfort and fatigue, especially when the key tops are not designed to fit the natural shape and slope of the user's hand.
Innovation Solution
A key input device with keys arranged in a sloping stepwise configuration on a top casing with parallel surfaces, where the keys are inserted into corresponding through holes, and a nonwoven fabric sheet is used to absorb keystroke sounds, ensuring uniform operability and reduced fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If key tops are arranged on a flat panel part, then the device structure is simple, but the ergonomic fit for user's hand is poor causing discomfort and fatigue
Solution Approach 1:
The panel is divided into multiple sections with different inclinations: a first panel part with a first inclination and a second panel part with a second inclination. This segmentation allows each section to be optimized for specific ergonomic requirements, improving hand fit and comfort during operation.
Solution Approach 2:
Different regions of the panel are given different inclinations and characteristics. The first panel part has a specific inclination angle optimized for certain keys, while the second panel part has a different inclination optimized for other keys. This local differentiation enhances ergonomic fit without requiring complete redesign of the entire panel.
2Ease of operation
If keys are arranged without stepwise configuration, then manufacturing is simpler, but uniform operability across different key positions is not achieved
Solution Approach 1:
The key arrangement is segmented into multiple levels with different inclinations. Keys on the first panel part are positioned at a first inclination, while keys on the second panel part are positioned at a second inclination. This segmentation creates uniform operability by ensuring that keys at different positions require similar finger movement distances and forces.
Solution Approach 2:
The key arrangement transitions from a two-dimensional flat layout to a three-dimensional stepped configuration. By adding the vertical dimension through different panel inclinations, the design achieves uniform operability across all keys while maintaining manufacturing feasibility through standardized key components.
3Ease of operation
If traditional key input devices are used, then keystroke sounds are not minimized, but the user experience is enhanced with reduced fatigue and discomfort
Solution Approach 1:
The patent incorporates cushioning elements in advance within the key structure and panel design. These cushioning features are built into the key input device before use, absorbing impact and reducing keystroke sounds while simultaneously improving comfort and reducing fatigue during prolonged operation.
Data Source
AI summary
A key input device includes keys and a member having surfaces parallel to each other, the surfaces each having at least one first through hole among first through holes. The keys are inserted to the corresponding first through holes. The member has a first end side, a second end side, a third end side, and a fourth end side, the first end side being opposite the second end side, the third end side being perpendicular to the first end side and opposite the fourth end side. The surfaces of the member are flat from the first end side toward the second end side. The member has a step between a surface on the third end side and a surface on the fourth end side among the surfaces.