Coil Component Magnetic Resin Mounting Surface
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Solution Overview
Problem
Conventional coil components fail to achieve desired resonance operations due to magnetic coupling with nearby wiring and electronic components, limiting the size reduction of printed circuit boards.
Innovation Solution
A coil component with a magnetic resin disposed on the mounting surface to suppress magnetic flux leakage and prevent magnetic coupling, while maintaining detection sensitivity by not covering the detecting surface, allowing for a reduction in board size and improved detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the coil component is disposed on a printed circuit board with wiring and electronic components in the vicinity, then the board can be compact, but magnetic coupling occurs between the coil component and nearby components, preventing desired resonance operation
Solution Approach 1:
The magnetic resin is selectively disposed only on the mounting surface side of the coil conductor, creating a localized magnetic field confinement structure. This allows the coil component to maintain strong coupling with nearby components for compact board design while the magnetic resin prevents unwanted magnetic flux leakage, enabling desired resonance operation to be achieved.
2Reliability
If magnetic resin is disposed on the mounting surface side of the coil conductor, then magnetic flux leakage is suppressed and desired inductance is acquired, but the magnetic resin may interfere with detection sensitivity on the detecting surface side
Solution Approach 1:
The coil component structure is segmented into two distinct surfaces: the mounting surface side where magnetic resin is disposed to suppress magnetic flux leakage and ensure desired inductance, and the detecting surface side where no magnetic resin is disposed to maintain detection sensitivity. This segmentation allows both requirements to be satisfied simultaneously.
3Reliability
If the magnetic resin covers the entire coil conductor, then magnetic flux leakage is maximally suppressed, but the detection sensitivity is reduced due to interference with the magnetic field generation
Solution Approach 1:
The magnetic resin is selectively disposed only on the mounting surface side of the coil conductor, creating a localized magnetic field confinement structure. This allows the coil component to maintain strong coupling with nearby components for compact board design while the magnetic resin prevents unwanted magnetic flux leakage, enabling desired resonance operation to be achieved.
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 enables desired resonance operations and reduces the size of the board with the coil component, while maintaining detection sensitivity and preventing interference with nearby components.
Implementation Method 1
the magnetic resin can suppress a magnetic flux leakage from the mounting surface of the coil component
Implementation Method 2
a high-frequency magnetic field is generated from the coil component to detect an eddy-current loss caused by bringing the coil component closer to the roller
Data Source
AI summary
A coil component includes a mounting surface that is a side mounted on a mounting board and a detecting surface that is a side generating a magnetic field to detect a distance from a detected conductor. The coil component has a coil conductor formed into a spiral shape, and a magnetic resin disposed on the mounting surface side of the coil conductor without being disposed on the detecting surface side of the coil conductor.