Button Device With Scissor Switch Modules For Uniform Key Press Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional button devices for keyboards suffer from inconsistent key press resistance due to varying elasticity of elastic members, leading to uncomfortable typing experiences caused by assembly errors.
Innovation Solution
The button device incorporates scissor switch modules with rotatable frames and a pushbutton module, utilizing piezoresistive or capacitive sensors to detect stress uniformly across the keycap, eliminating the need for individual elastic members and ensuring consistent press detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple elastic members are used in switch modules, then stress detection coverage is improved, but manufacturing precision deteriorates due to assembly errors causing inconsistent elasticity
Solution Approach 1:
The patent removes the elastic members from the switch modules entirely, extracting the problematic component that caused inconsistent key press resistance. The sensing members are repositioned to directly detect key cap stress without relying on elastic members, thereby eliminating assembly errors related to elastic member installation while maintaining comprehensive stress detection coverage through the repositioned sensing members.
2Reliability
If elastic members are installed in switch modules, then key press detection is enabled, but device complexity increases due to assembly errors and inconsistent elasticity
Solution Approach 1:
The patent extracts the elastic members from the switch module assembly, eliminating the source of assembly complexity and inconsistency. The key press detection function is maintained through repositioned sensing members that directly contact the key cap, simplifying the overall structure while improving reliability by removing the intermediate elastic member component that caused variability.
3Measurement precision
If sensing members are positioned at spaced locations, then stress detection accuracy is improved, but device complexity increases due to multiple switch modules
Solution Approach 1:
The patent merges the sensing functions into a unified sensor module with sensing members positioned at different locations (first sensing member at center, second sensing members at opposite sides). This consolidation maintains comprehensive stress detection accuracy across multiple positions while simplifying the overall structure by eliminating the need for multiple separate switch modules with elastic members.
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 ensures uniform key press detection and resistance, enhancing typing comfort by eliminating the variability in elastic forces and assembly-related issues, allowing proper keystroke registration regardless of the press location.
Implementation Method 1
a resilient member 524 that is disposed above a respective one of the second sensing members 32
Implementation Method 2
utilizing piezoresistive or capacitive sensors to detect stress uniformly across the keycap
Data Source
AI summary
A button device includes a base extending in a longitudinal direction, a sensor module mounted to the base, a keycap disposed above the sensor module, two scissor switch modules, and a pushbutton module. The sensor module has a first sensing member and two second sensing members disposed at two opposite sides of the first sensing member in the longitudinal direction. The pushbutton module is operable to switch between a released state, where the pushbutton module is not in direct contact with the first sensing member such that each of the scissor switch modules would not be indirect contact with corresponding second sensing member, and a depressed state, where the pushbutton module comes in direct contact with the first sensing member.