Coil Device

The coil device addresses miniaturization challenges by separating the terminal block from the bobbin and optimizing its placement, resulting in a smaller, efficiently wound, and well-insulated coil device with reduced resistance and improved cooling.

JP7750693B2Active Publication Date: 2025-10-07TDK CORP
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Patent Information

Application Number
JP2021140535
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-08-30
Publication Date
2025-10-07
Estimated Expiration
2041-08-30

AI Technical Summary

Technical Problem

Existing coil devices face challenges in achieving miniaturization due to the size increase caused by terminal blocks formed at the axial ends of the bobbin, which also interfere with automatic winding processes and hinder low-profile designs.

Method used

The coil device features a terminal block separate from the bobbin, positioned perpendicular to the winding core, allowing for separate winding and attachment without adhesives, with hook-shaped engagements for secure fixation and reduced lead-out routing, and a cover portion for protection and insulation.

Benefits of technology

This configuration enables a smaller coil device with improved winding efficiency, reduced electrical resistance, and enhanced insulation, while maintaining sufficient fixing strength and cooling capabilities.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To provide a coil device capable of being downsized.SOLUTION: A coil device 10 includes a winding core part 21 around which a first wire 41c and a second wire 42c are wound on an outer surface, a bobbin 20 having flange parts 22a, 22b formed on the end part in the axial direction of the winding core part 21, and a terminal block 70 formed separately from the bobbin 20 and is attached to the bobbin 20. The terminal block 70 is arranged in a location spaced apart from the outer surface of the winding core part 21 in the direction perpendicular to the axial direction of the winding core part 21.SELECTED DRAWING: Figure 3
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Citation Information

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