Detachable Keycap Cover Assembly for Easy Keyboard Customization
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Solution Overview
Problem
Existing keyboard devices require replacement of the entire unit to change keycaps, which is inconvenient for users seeking different appearances.
Innovation Solution
A keycap design comprising a lower plate with engaging holes and an upper cover with buckle members that allow detachable assembly, facilitated by complementary shapes and a tool for easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the entire keyboard device is replaced to change keycaps, then the appearance can be changed, but the convenience and cost increase significantly
Solution Approach 1:
The keycap is divided into two separable parts: an upper cover and a lower plate. The lower plate remains attached to the keyboard while the upper cover can be detached and replaced. This segmentation allows users to change keycap appearances by replacing only the upper cover portion, not the entire keyboard device.
Solution Approach 2:
The lower plate is designed with a universal engagement structure (engaging holes with sloping surfaces) that can accommodate multiple different upper covers. This allows a single lower plate to work with various upper cover designs, enabling appearance customization without replacing the base keyboard structure.
2Adaptability or versatility
If traditional fixed keycap structures are used, then structural simplicity is maintained, but replacement capability is lost
Solution Approach 1:
The keycap is divided into two separable parts: an upper cover and a lower plate. The lower plate remains attached to the keyboard while the upper cover can be detached and replaced. This segmentation allows users to change keycap appearances by replacing only the upper cover portion, not the entire keyboard device.
Solution Approach 2:
The engagement structure uses simple geometric parameters - circular engaging holes with sloping surfaces and corresponding protrusions. By optimizing these parameters (hole diameter, sloping angle, protrusion shape), the design achieves easy snap-fit assembly without requiring complex mechanisms, maintaining structural simplicity while enabling replacement capability.
3Ease of operation
If detachable assembly structures are added to enable keycap replacement, then customization convenience is improved, but manufacturing precision requirements increase
Solution Approach 1:
The engagement structure uses simple geometric parameters - circular engaging holes with sloping surfaces and corresponding protrusions. By optimizing these parameters (hole diameter, sloping angle, protrusion shape), the design achieves easy snap-fit assembly without requiring complex mechanisms, maintaining structural simplicity while enabling replacement capability.
Solution Approach 2:
The engaging holes and protrusions use circular/arc-shaped geometries with sloping surfaces. The curved surfaces allow for self-aligning and self-centering during assembly, tolerating minor manufacturing variations while ensuring reliable engagement. The arc-shaped outer edges of buckle portions and protrusions facilitate smooth insertion and removal.
Data Source
AI summary
The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has at least two engaging holes recessed inwardly from an upper surface of the lower plate and separated from each other. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has at least two buckle members disposed on an inner top surface of the upper cover and respectively corresponding to the at least two engaging holes, and each of the buckle members has two buckle portions separated from each other, and each of the buckle portions has a protrusion protruding laterally outward, and each of the protrusions is configured to engage with a portion of the corresponding engaging hole.