Magnetic Key Switch Conduction for Stable Jitter-Free Sensing
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Solution Overview
Problem
Existing key switches face issues such as easy aging, short service life, poor contact stability, electrical jitter, and increased internal components due to physical conduction structures, which affect pressing balance and operational reliability.
Innovation Solution
A magnetic conduction mechanism is introduced, comprising a balance frame, a driving rod, and an induction switch, replacing traditional physical conduction with a magnet and induction switch to ensure long service life, good contact stability, and reduced internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a physical conduction structure is used in the key switch, then the conducting function is achieved, but the service life is short and contact stability is poor due to aging and wear
Solution Approach 1:
The patent replaces the traditional mechanical contact structure with a magnetic field-based conduction system. A magnet is attached to the driving rod, and a Hall element detects the magnet's position to trigger conduction. This eliminates direct physical contact between conducting components, preventing wear and aging while maintaining reliable signal transmission throughout the product's service life.
2Reliability
If a physical conduction structure is added to the key switch, then the conducting function is achieved, but electrical jitter occurs and contact stability deteriorates
Solution Approach 1:
The patent substitutes the mechanical contact-based conduction system with a magnetic field detection system. The Hall element senses the magnet's position without physical contact, eliminating the bouncing and instability inherent in mechanical switches. This non-contact detection method provides clean, jitter-free electrical signals and stable contact state transitions.
3Ease of operation
If both balance frame structure and physical conduction structure are added to the key switch, then pressing balance is improved, but internal components increase and occupied space enlarges
Solution Approach 1:
The patent merges the balance frame structure with the conduction mechanism by integrating the magnet directly onto the driving rod that is part of the balance frame assembly. The driving rod serves dual purposes: maintaining pressing balance through the balance frame and triggering conduction through the attached magnet. This integration eliminates separate conduction components, reducing overall device complexity while preserving pressing balance performance.
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
The magnetic conduction mechanism provides high-accuracy on-off actions, improves sensitivity, and reduces internal space occupation while ensuring stability and longevity.
Implementation Method 1
the conduction component comprises a magnet linked with the driving rod, and an induction switch electrically connected to a PCB and corresponding to the magnet
Data Source
AI summary
A magnetic conduction mechanism applied to a push-button switch, the magnetic conduction mechanism comprising a base, a balance frame assembly arranged on the base, a conducting assembly, and a driving rod which is driven by the balance frame assembly to trigger the conducting assembly to carry out connection and disconnection, wherein the conducting assembly comprises a magnet linked to the driving rod and an inductive switch which is electrically connected to a PCB and corresponds to the magnet. The magnetic conduction mechanism applied to a push-button switch has the advantages of being less prone to aging, a long service life, good contact stability and being free of electrical shaking, and the connection and disconnection accuracy is high, thus improving the sensitivity of the push-button switch, and achieving a reduction in the number of internal components and occupying less of an internal space.