Magnetic Reed Switch Parallel Conductive Lines
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Solution Overview
Problem
Conventional magnetic reed switches have high electrical resistivity, limiting the current to less than 5 A due to high resistance at the reed ends, which is insufficient for many applications.
Innovation Solution
The magnetic reed switch incorporates multiple soft metal conductive lines connected in parallel to reduce resistance, featuring an insulating casing with magnetic reeds and electric contacts coated with noble metals, and a sealing structure filled with inert gas to prevent oxidation, allowing for higher load currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional magnetic reed switches use materials with excellent magnetic properties and electrical conductivities, then magnetic performance is improved, but electrical resistivity increases leading to high resistance and high heat generation
Solution Approach 1:
The reed switch structure is segmented into multiple parallel conductive paths by providing multiple soft metal conductive lines (at least two) between the electric contacts and magnetic reeds. This segmentation divides the current flow into multiple paths, reducing the resistance and heat generation in each individual path while maintaining excellent magnetic properties of the original materials.
Solution Approach 2:
Multiple soft metal conductive lines are combined in parallel configuration to create a composite conductive system. The merging of multiple conductive paths reduces the overall electrical resistivity while preserving the magnetic characteristics of the reed switch components.
2Power
If conventional reed switches operate at high current, then load capacity is improved, but heat generation increases due to high resistance
Solution Approach 1:
The current path is segmented into multiple parallel conductive lines, distributing the total current across several paths. This reduces the current density and resistive heating in each individual path, enabling higher overall load current capacity without excessive heat generation.
Solution Approach 2:
The electrical resistance parameter is changed by introducing multiple parallel conductive paths with lower individual resistance. This parameter change directly reduces the I²R heat loss, allowing the reed switch to handle higher currents efficiently.
3Ease of manufacture
If electric contacts are exposed to air, then manufacturing simplicity is improved, but oxidation occurs reducing reliability
Solution Approach 1:
The electric contacts are placed within a sealed insulating casing that is filled with inert gas (such as nitrogen or argon). This creates an inert atmosphere that prevents oxidation of the electric contacts and conductive lines, significantly improving reliability and durability without complicating the manufacturing process.
Solution Approach 2:
The inert gas acts as an intermediary substance between the electric contacts and the external air environment. It provides a protective barrier that prevents direct contact between oxygen and the conductive surfaces, eliminating oxidation while maintaining manufacturing simplicity.
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 significantly reduces conduction resistance, enabling the magnetic reed switch to handle much larger load currents while maintaining excellent magnetic properties and preventing oxidation of electric contacts.
Implementation Method 1
The multiple soft metal conductive lines are connected in parallel to two ends of the magnetic reeds, thus greatly reducing the resistance of the magnetic reeds
Implementation Method 2
A reed switch is an electrical switch operated by an applied magnetic field
Implementation Method 3
The sealing structure inside the insulating casing is filled with an inert gas to prevent the electric contacts from being oxidized
Data Source
AI summary
A magnetic reed switch, including: an insulating casing, magnetic reeds, and at least one flexible element. The insulating casing is a hollow structure. The magnetic reeds are disposed inside and at two ends of the insulating casing, respectively. Ends of the magnetic reeds overlap. The at least one flexible element is an electrically conductive material and is disposed on at least one magnetic reed. The at least one flexible element is connected in parallel to two ends of the magnetic reeds.