Induction Component Shielding Ring Positioning
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Solution Overview
Problem
Ensuring the correct size and arrangement of an air gap in induction components is challenging, as it affects the electrical properties and requires precise alignment between the bobbin and shielding, often necessitating additional components like plastic housings for alignment.
Innovation Solution
The induction component features a coil former with a flange and a shielding ring, where the shielding ring is positioned relative to the flange using geometric positioning means, such as an inner step on the shielding ring, to maintain a consistent air gap without the need for an additional plastic housing, ensuring correct sizing and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional plastic housing with alignment means is used to position the shielding ring, then the air gap size and arrangement are controlled precisely, but the device complexity increases
Solution Approach 1:
The invention extracts and eliminates the plastic housing from the structure, retaining only the essential positioning function through geometric design of the shielding ring and flange interfaces. This removes the additional component while preserving the air gap control capability.
Solution Approach 2:
The positioning function previously separated in the plastic housing is merged into the shielding ring and flange structures themselves through geometric design. The shielding ring's front edge geometry and flange configuration work together to provide both structural support and precise positioning in a unified metallic assembly.
2Device complexity
If the shielding ring is positioned using geometric design of the shielding ring and flange, then the device complexity is reduced, but the manufacturing precision of the air gap may be compromised
Solution Approach 1:
The invention applies local quality by designing specific geometric features (front edge of shielding ring and flange configuration) with precise dimensional relationships. These localized geometric characteristics ensure accurate air gap positioning without requiring complex overall structures or additional components.
Solution Approach 2:
The shielding ring features an asymmetric front edge design with a specific profile that interfaces with the flange. This asymmetric geometry provides unique positioning characteristics that prevent shifting and ensure consistent air gap dimensions, leveraging the non-symmetric shape for functional precision.
3Stability of the object's composition
If the shielding ring is secured against shifting using a step over the entire circumference, then the position stability is improved, but the manufacturing complexity of the shielding ring increases
Solution Approach 1:
The shielding ring's front edge is segmented into distinct geometric zones: a bearing surface region and a contacting surface region. This segmentation allows the step structure to provide comprehensive positioning stability around the circumference while maintaining manufacturability through clear, distinct geometric features that can be produced with standard machining processes.
Data Source
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Figure 7
AI summary
A component for forming an induction element comprises a coil former with a core and two radially projecting flanges formed at the respective axial ends of the core. One of these flanges is designed for mounting to a conductor plate and is larger than the other. The coil former is surrounded on its outer surface by a shielding ring that rests on the larger of the two flanges. For this purpose, the shielding ring has an inwardly directed step at its lower end edge. One leg of this step forms a bearing surface for contact with the inside of the flange. The other leg forms a contact surface for contact with the outer edge of the flange. The step preferably extends around the entire circumference of the shielding ring. This defines the size and position of an air gap formed between the upper flange and the inside of the shielding ring.