A high-polymer magnetic ultra-thin magnet array device for a planar diaphragm loudspeaker

By using a thin metal backplate and clips to fix the permanent magnets in a planar diaphragm loudspeaker, the production difficulty and thinning of the magnet array were solved, achieving high-precision assembly and improved driving force.

CN224418941UActive Publication Date: 2026-06-26DONGGUAN SHUANGYUN ACOUSTIC TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN SHUANGYUN ACOUSTIC TECH CO LTD
Filing Date
2025-08-01
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing planar diaphragm loudspeaker magnet array devices suffer from problems such as high production difficulty, limited thin and light design, and large structural tolerances. Injection-molded magnet arrays are difficult to achieve high precision and thinness.

Method used

The backplate is made of thin metal sheet. Permanent magnets are embedded in the backplate by clips and fixed with adhesive to form a high-precision ultra-thin magnet array. The thickness of the magnet array is as small as 0.15mm, achieving a lightweight design. The magnet distribution is precisely planned by clips.

Benefits of technology

It achieves high-precision assembly of magnet arrays, reduces production difficulty and cost, enhances magnetic line density, improves driving force, and increases the peak magnetic field of the working surface of the magnet array by 17%-20%.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of electroacoustics, concretely is a kind of high polymerization magnetic ultrathin magnet array device for plane diaphragm loudspeaker, including the backplate made of one metal sheet, one side of backplate is defined as working surface, and working surface has the air gap of openwork, and working surface also has multiple clamping claws;It also includes the magnet array of being located at working surface, and magnet array has multiple permanent magnets, and permanent magnet is respectively inlayed in working surface by clamping claw;Wherein, backplate has multiple through two sides' point gum mouth, and point gum mouth is distributed in the area of each permanent magnet and working surface contact, for exposing the local area of each permanent magnet, and the area of each permanent magnet exposed in point gum mouth is bonded with backplate by point gum.The process difficulty, efficiency, cost of assembly of the utility model are all superior to the in-mold insert process used in prior art, breakthrough light and thin design is realized, and under the condition of using same permanent magnet, the driving force of plane diaphragm is significantly improved.
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