Electromagnetic Induction Key Switch for Contactless Wear Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing switch technologies face challenges in extending the wear life of contact parts while maintaining good hand feeling and reducing noise, which affects user experience.

Innovation Solution

A key design utilizing a magnetic component, closed loop, voltage drop detection chip, and conductor that moves to cut magnetic induction lines, generating induced current and voltage drops to trigger functions without physical contact, thereby extending service life and enhancing user experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional switch implementation technology is used, then contact parts can be made more durable through additional materials and processing, but manufacturing cost increases and hand feeling deteriorates with noise

Engineering Contradiction:

Improvewear life of contact partsVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the mechanical contact-based switch system with an electromagnetic induction system. The key body drives a conductor to cut magnetic induction lines in a magnetic field, generating induced current that triggers key functions. This eliminates mechanical contact parts entirely, resolving the contradiction by improving reliability without increasing manufacturing cost, while also eliminating noise and improving hand feeling.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If conventional switch implementation technology is used, then contact parts can be made more durable through additional materials and processing, but hand feeling deteriorates and noise is generated

Engineering Contradiction:

Improvewear life of contact partsVSAvoidnoise and hand feeling

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces mechanical contact-based switching with electromagnetic induction. The conductor cutting magnetic induction lines generates induced current without mechanical contact, eliminating noise generation and improving hand feeling while maintaining reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the key body movement and the electrical signal generation. The magnetic field mediates the interaction, allowing the conductor to generate induced current through electromagnetic induction rather than direct mechanical contact, thereby eliminating noise and improving user experience.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If electromagnetic induction is used to eliminate contact parts, then service life is extended and noise is reduced, but device complexity increases

Engineering Contradiction:

Improveservice life of keyVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical contact structures with a simpler electromagnetic induction system consisting of a magnetic component, conductor, and voltage drop detection chip. This substitution extends service life and reduces noise while the overall device complexity remains manageable due to the straightforward implementation of the electromagnetic components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution effectively extends the service life of the key, reduces noise, and improves hand feeling, leading to a better user experience by using electromagnetic induction to implement key functions without physical contact parts.

Implementation Method 1

the conductor in the closed loop moves and cuts the magnetic induction lines in the magnetic field by using the electromagnetic induction phenomenon, magnetic flux in the closed loop is changed, induced current is generated

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a magnetic component arranged to generate a magnetic field

Methodology Applied

Scientific EffectMagnetic field generation: Magnetic Field

Implementation Method 3

the induced current generates voltage drops at two ends of the preset device in the closed loop, a state of the key is judged according to the voltage drops

Methodology Applied

Scientific EffectVoltage drop: Ohm's Law

Data Source

PatentUS10284197B2Key

Publication Date: 2019.05.07 ZTE CORP

AI summary

A key is provided, including: a magnetic component arranged to generate a magnetic field; a closed loop, herein the closed loop includes a preset device in series connection and a conductor set in the magnetic field; a voltage drop detection chip, herein the voltage drop detection chip has two pins respectively connected to two ends of the preset device and an output port arranged to output a detected voltage drop signal between the two pins; and a key body movably connected on a supporting part, herein the key body is connected to the conductor, the key body can move in two opposite directions on the supporting part, and the key body drives the conductor to cut magnetic induction lines in the magnetic field during motion.