Bent Yoke Magnetization for Precise Linear Member Targeting
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Solution Overview
Problem
Existing magnetization devices for medical devices like guide wires, catheters, and injection needles face challenges in accurately magnetizing a predetermined target range due to unwanted magnetization of portions outside the magnetization coil, leading to low accuracy and inefficiency.
Innovation Solution
A magnetization device with a bent magnetization yoke and a wound magnetization coil generates a magnetic field between separated end portions, forming an annular magnetic circuit to accurately magnetize a linear member within a specific range, while accommodating the member to suppress magnetic flux deviation and prevent unwanted magnetization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a linear member is arranged inside a magnetization coil for magnetization, then the target portion can be magnetized, but magnetic flux leaks to the outside of the magnetization coil causing unwanted magnetization of portions outside the target range
Solution Approach 1:
The magnetization device segments the magnetic circuit into distinct regions using multiple yokes (first yoke, second yoke) positioned at different locations. Each yoke independently guides magnetic flux through its associated linear member portion, preventing flux leakage to unintended areas and enabling precise control over which portions get magnetized.
Solution Approach 2:
The first and second yokes act as intermediary components that guide and confine magnetic flux between the magnetization coil and the linear member. These yokes serve as magnetic flux pathways that prevent direct leakage to surrounding areas, effectively mediating the magnetization process to achieve higher precision.
2Productivity
If magnetic flux is generated to magnetize the linear member, then magnetization is achieved, but magnetic flux deviation reduces magnetization efficiency
Solution Approach 1:
The device applies local quality by positioning specific yokes at strategic locations to address local magnetic flux deviations. The first yoke handles flux guidance at one location while the second yoke addresses another location, ensuring uniform flux distribution across different segments of the linear member and improving overall magnetization efficiency.
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
This configuration enables high-accuracy magnetization of a predetermined target range with improved magnetization efficiency and reduced deviation of magnetic flux, allowing for precise and uniform magnetization of medical devices.
Implementation Method 1
a magnetization coil that is wound around the magnetization yoke, and generates a magnetic field between the first end portion and the second end portion by application of a voltage
Implementation Method 2
a magnetization yoke that has a first end portion and a second end portion located on an opposite side of the first end portion, and is bent such that the first end portion and the second end portion are separated from and opposed to each other
Data Source
AI summary
A magnetization device that magnetizes a linear member, includes: a magnetization yoke that has a first end portion and a second end portion located on an opposite side of the first end portion, and is bent such that the first end portion and the second end portion are separated from and opposed to each other, and a magnetization coil that is wound around the magnetization yoke, and generates a magnetic field between the first end portion and the second end portion by application of a voltage.