Earphone moving-iron unit with improved structure

Abstract

The invention relates to an earphone moving-iron unit with an improved structure. The earphone moving-iron unit comprises a balanced armature, vibrating diaphragms and a driving magnet mechanism arranged in a shielding case, wherein the balanced armature is U-shaped, and two side parts of the balanced armature are coiled for at least one circle respectively; coils are connected in series; the driving magnet mechanism is arranged corresponding to an opening part of the balanced armature; and the two side parts of the balanced armature are in transmission connection with one vibrating diaphragm respectively. The driving magnet mechanism is preferably formed by combining an I-shaped iron core and two permanent magnets. The earphone moving-iron unit with the improved structure has the advantages that: the balanced armature is driven by two coils, and the effects of sectional drive and separate drive are achieved by adjusting the structures of the two coils according to application needs; compared with a conventional single vibrating diaphragm, the earphone moving-iron unit with an improved structure adopts the design of double-vibrating diaphragm driving structures independent of each other, therefore, the product conversion efficiency is increased, and frequency response curves of the moving-iron unit are enriched; and with the adoption of the design of an optimized driving magnet mechanism structure, a magnetic circuit is effectively optimized, the utilization efficiency of the magnetic circuit is increased, and the structure is more compact and firmer.

Description

technical field [0001] The invention relates to a speaker device, in particular to a moving iron unit used in micro-shaped speaker devices such as earphones, and belongs to the fields of electroacoustics and micro-mechanics. Background technique [0002] At present, the moving iron unit used in the moving iron earphones on the market adopts the basic principle of electromagnetic conversion. When working, the AC current signal passes through the magnetic induction coil, and the coil induces magnetism, and the balance armature placed in the middle of the coil is magnetized ( Polarized, the balanced armature that is magnetized (polarized) vibrates up and down in the two permanent magnets according to the principle that the same (polarity) repels each other and the opposite (polarity) attracts each other. Change the sounding diaphragm of the iron unit, which is connected to the balance armature by a metal transmission rod. When the armature vibrates up and down, it also drives t...

AI Technical Summary

Problems solved by technology

However, the existing moving iron earphones generally have low conversion efficiency, insufficient high / low frequency response, slow response speed, high harmonic distortion, poor resolution of sound (especially human voice), and sound quality is easily affected by changes in temperature and humidity. Impact and other deficiencies need to be improved urgently

Images