Stepped Key Input Layout for Consistent Ergonomic Operability
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Solution Overview
Problem
Conventional electronic devices with key input sections suffer from user fatigue due to the lack of ergonomic design, leading to discomfort and reduced operability during prolonged use, as the deformation of elastic key-supporting sheets alters the feel of each key, causing uneven key operability.
Innovation Solution
The electronic device features a key input section with keys arranged in a stepped configuration, where the operation surfaces on the first-end side are higher than those on the second-end side, and the housing is inclined to accommodate the natural hand position, ensuring consistent key height and reduced fatigue through standardized rubber key tops with differential heights and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If keys are arranged with different heights to accommodate natural hand position, then user comfort is improved, but key operability becomes inconsistent
Solution Approach 1:
The patent applies local quality by making different parts of the key input section have different key heights. Specifically, keys in the lower row have a greater height from the lower surface of the key input section to the operation surface compared to keys in upper rows. This local differentiation accommodates the natural hand position and curvature, improving user comfort while maintaining consistent operability through standardized key construction.
Solution Approach 2:
The key input section is segmented into multiple rows with different key heights. The lower row is separated and given a greater height than the upper rows, creating distinct segments that match the ergonomic requirements of different finger positions. This segmentation allows each row to be optimized for its specific operational context.
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
This design enhances user comfort and operability by maintaining consistent key feel and reducing fatigue, while preventing wobbling and improving durability through standardized rubber key configurations and differential key heights, thereby improving overall user experience.
Implementation Method 1
standardized rubber key tops with differential heights
Data Source
AI summary
According to an embodiment, an electronic device includes a plurality of operation parts arranged from a first-end side to a second-end side of a housing and each including a keytop member having an operation surface. The keytop member corresponding to a first operation part, which is one of the operation parts arranged on the first-end side, has a lower-end-to-operation-surface height greater than that of the keytop member corresponding to a second operation part, which is one of the operation parts arranged on the second-end side.