A voice coil assembly wound with a litz wire

By using Litz wire winding and an aluminum foil voice coil skeleton design, the problems of large winding gaps and eddy current heating in the voice coil assembly were solved, resulting in higher magnetic field efficiency and voice coil stability, while reducing air resistance and friction damage.

CN122372909APending Publication Date: 2026-07-10HUBEI ZHONGKE HUAYE NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI ZHONGKE HUAYE NEW MATERIAL TECH CO LTD
Filing Date
2026-05-06
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing voice coil assemblies suffer from problems such as large winding gaps, high air resistance, and unsuitable magnetic gaps, leading to low magnetic field efficiency and winding friction damage.

Method used

The voice coil assembly, which uses Litz wire wound into a spiral to create a gap, combined with an aluminum foil voice coil skeleton and a weight-reducing heat dissipation groove, reduces eddy current heating, improves magnetic gap utilization and voice coil skeleton stability.

Benefits of technology

It reduces air resistance and eddy current heating during voice coil movement, improves magnetic field efficiency and voice coil stability, reduces winding friction damage, and enhances the mechanical strength and heat dissipation performance of the voice coil.

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Abstract

The application provides a voice coil assembly wound by a Litz wire, relates to the technical field of acoustic components, and comprises a voice coil former and a first winding. The voice coil former comprises a cylindrical body and a winding groove located on the outer wall surface of the cylindrical body. At least one first winding is located in the winding groove. The outer diameter of the first winding located in the winding groove is less than or equal to the outer diameter of the cylindrical body. The first winding located in the winding groove is a single-layer or multi-layer structure wound by a square-pressed Litz wire. The application has the advantages of stable size, small magnetic gap and the like.
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