Loudspeaker module, loudspeaker system and diaphragm balance adjusting method

Abstract

The invention discloses a loudspeaker module, a loudspeaker system and a diaphragm balance adjusting method. The loudspeaker module comprises a loudspeaker module casing, a loudspeaker body and an air pressure balancing device; the loudspeaker body divides an internal cavity of the loudspeaker module casing into a front sound cavity and a rear sound cavity isolated from the front sound cavity; and the air pressure balancing device comprises an air tank and a driving mechanism, the air tank is communicated with the rear sound cavity, and the driving mechanism can drive air in a cavity of the air tank into the rear sound cavity or extract air in rear sound cavity to the cavity of the air tank. Pressure release holes are omitted in the loudspeaker module, the driving mechanism and air tank of the air pressure balancing device are used to drive air into or extract air out of the air tank, so that the pressure intensity in the rear sound cavity is changed and the air pressure of the rear sound cavity is balanced with that of the external environment.

Description

technical field [0001] The invention relates to the field of acoustic products, and more particularly, to a speaker module, a speaker system using the speaker module, and a method for adjusting the balance of the diaphragm. Background technique [0002] Loudspeakers are widely used in people's daily production and life as a sound-generating device for electronic products such as mobile phones, televisions, and computers. At present, the common speakers mainly include dynamic speakers, electromagnetic speakers, capacitive speakers, piezoelectric speakers, etc. Among them, the dynamic speakers have the characteristics of relatively simple production, low cost, and good low-frequency sound advantages. [0003] The existing dynamic speaker is also known as the dynamic speaker module, which usually includes a speaker module shell and a speaker unit, wherein the typical structure of the speaker module shell includes an upper shell and a lower shell, and an upper shell and a lower ...

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Problems solved by technology

[0005] However, this speaker module with a pressure relief hole has the following disadvantages: (1) when the terminal product with the speaker is installed in a harsh working environment, impurities such as corrosive gas in the external environment can easily enter the rear acoustic cavity through the pressure relief hole, Corrosion of components such as magnets or sound-absorbing materials; (2) When the end product with the speaker is completely sealed, even if there is a pressure relief hole on the speaker, the pressure relief hole will not be able to balance the pressure of the rear sound cavity; (3) When the air pressure of the external environment changes sharply, the size of the pressure relief hole is too small to balance the air pressure of the external environment and the pressure in the rear sound cavity of the speaker in time, causing the speaker to be in a distorted state; (4) When the diaphragm of the speaker unit When it is not in a balanced position, the pressure in the rear sound cavity of the speaker cannot be adjusted through the pressure relief hole so that the diaphragm is in a balanced position, resulting in a distorted state of the speaker

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