Magnetic Keyswitch Design for Stable Feedback and Compact Systems
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Summary
Problems
Conventional keyswitches face issues with unstable driving force and poor pressing feeling due to reduced space, which affects the operation stability and feedback provided to the user, especially when using magnetic attraction force for restoring the keycap.
Innovation solutions
A keyswitch design incorporating a magnetic attraction force and a force transmission part, where the keycap moves the movable part downward through the force transmission part to trigger the switch, providing a direct and stable reaction force to the user by eliminating intermediate components that can destabilize the force transfer.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the keyswitch is reduced in volume (height decreased), then the compactness is improved, but the space for disposing the elastic rubber dome is reduced, causing the driving force to be limited and operation stability to deteriorate
Why choose this principle:
The patent replaces the elastic rubber dome (mechanical elastic force) with a magnetic attraction force system. The magnetic force is generated between a fixed magnetic component on the base and a movable magnetic component on the movable part, providing the restoring force for the keycap without requiring large space for an elastic dome structure.
Principle concept:
If the keyswitch is reduced in volume (height decreased), then the compactness is improved, but the space for disposing the elastic rubber dome is reduced, causing the driving force to be limited and operation stability to deteriorate
Why choose this principle:
The patent changes the physical principle from elastic deformation to magnetic field interaction. By adjusting magnetic field strength and distribution, the system achieves stable driving force in a compact space, resolving the contradiction between reduced volume and maintained operation stability.
Application Domain
Data Source
AI summary:
A keyswitch design incorporating a magnetic attraction force and a force transmission part, where the keycap moves the movable part downward through the force transmission part to trigger the switch, providing a direct and stable reaction force to the user by eliminating intermediate components that can destabilize the force transfer.
Abstract
A keyswitch uses a magnetic attraction force produced between and by a fixed part, fixedly disposed relative to a base, and a movable part, movably disposed relative to the base, as a driving force for returning a keycap to its original position. The movable part is between the fixed part and the base. The keyswitch also uses a force transmission part disposed between the keycap and the movable part as an intermediate for transferring force from the keycap to the movable part. When a force for pressing the keycap downward overcomes the magnetic attraction force, the movable part moves toward the base and then triggers a switch.