Scissor Key Support Assembly for Stable Keycap Pressing
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Solution Overview
Problem
Existing key devices suffer from poor stability due to gaps and manufacturing tolerances, causing the keycap to rotate and wobble when pressed.
Innovation Solution
A key device design featuring a bottom plate with pivot connecting portions and a supporting unit that includes stands and pivot shafts, along with supporting assemblies on the bottom plate and keycap, to stabilize the keycap and reduce rotation and wobbling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple connection element structure is used to interconnect the plastic structure and keycap, then the device complexity is reduced and ease of manufacture is improved, but gaps and manufacturing tolerances cause the keycap to rotate and wobble, resulting in poor stability
Solution Approach 1:
The supporting unit is divided into multiple stands (first stand, second stand, third stand) with distinct functions. Each stand has specific pivot connecting portions and supporting portions that segment the stabilization task across multiple components, reducing rotation and wobble while maintaining overall structural simplicity
Solution Approach 2:
The supporting unit acts as an intermediary component between the bottom plate and keycap. It includes pivot connecting portions that connect to the bottom plate and supporting portions that connect to the keycap, mediating the connection to eliminate gaps and tolerances while keeping the overall structure simple
2Stability of the object's composition
If multiple supporting assemblies are added to restrict keycap movement and improve stability, then keycap stability is improved, but the device complexity and number of components increase
Solution Approach 1:
Multiple supporting assemblies (first supporting assembly, second supporting assembly, third supporting assembly) are merged into a single integrated supporting unit. This unit combines multiple stands with pivot shafts and supporting portions that work together to restrict keycap movement in multiple directions simultaneously, improving stability without proportionally increasing complexity
Solution Approach 2:
The supporting unit serves multiple functions simultaneously: it connects the bottom plate to the keycap, provides pivot movement capability, restricts rotation through supporting portions, and eliminates gaps through the integrated structure. This multi-functionality improves stability without adding separate dedicated components for each function
Data Source
AI summary
A key device includes a bottom plate, a keycap, a supporting unit, a first supporting assembly, and a second supporting assembly. The bottom plate includes first pivot connecting portions and second pivot connecting portions. The keycap is disposed on the bottom plate, and includes first pivot portions and second pivot portions. The supporting unit pivotally interconnects the bottom plate and the keycap, and includes a first stand and a second stand. The first supporting assembly is disposed on the bottom plate or the first stand and is adjacent to the first pivot connecting portions or the first lower pivot shafts. The second supporting assembly is disposed on the keycap or the first stand and is adjacent to the second pivot portions or the first upper pivot shafts.