Composite diaphragm and its making method

Abstract

The invention discloses a composite diaphragm and a method of producing the composite diaphragm. The composite diaphragm mainly comprises a plate spherical cap and a soft suspension ring, the center of which is a plane, wherein, the plate spherical cap is on the soft suspension ring and the lower surface of the plate spherical cap touches the plane in the center of the soft suspension ring. The plate spherical cap comprises a middle plate and a metal foil attached to the middle plate. The metal foil can be glued on the upper surface of the middle plate or on the lower surface of the middle plate or on both the upper surface and the lower surface of the middle plate. The composite diaphragm of the invention has the advantages of simple manufacturing method and extended application of high frequency property and acoustic property of products of the composite diaphragm.

Description

【Technical field】 [0001] The invention relates to a miniature sound-generating device, in particular to a composite diaphragm structure of a miniature loudspeaker. 【Background technique】 [0002] With the continuous improvement of market demand, mobile phones are gradually becoming thinner, and the sound quality is required to be better and better, which requires the acoustic devices in mobile phones to be small, thin, and high-quality. The diaphragm is the core component of acoustic devices such as loudspeakers, and the requirements for its acoustic performance have also increased accordingly. [0003] In the related technology, the diaphragm of the speaker and the dome on it are formed by hot pressing from the same material, which cannot take into account the performance of low frequency and high frequency at the same time. When a lower low frequency is required, a softer material is required. Diaphragm, and when the surround is soft, the dome will also be soft, affecting...

AI Technical Summary

Problems solved by technology

[0005] In the Chinese patent ZL 03136666.X announced on March 7, 2007, a method of sputtering a nanoscale metal film or oxide film on the diaphragm and the edge is disclosed, which can adjust the performance of the micro-sounding device, but , the coating thickness of nano-scale metal film or oxide film is relatively thin, and the adjustment effect on performance is not obvious, and this coating process is more complicated and the production cost is higher

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