A kind of manufacturing method of stiffened vibrating membrane and vibrating membrane manufactured using this method

Abstract

The invention discloses a stiffening diaphragm manufacturing method and a diaphragm manufactured by the same. The manufacturing method comprises the following steps: coating one surface of a stiffening sheet with a hot melt adhesive layer; putting a diaphragm raw material on the hot melt adhesive layer, and heating and bonding the diaphragm raw material and the stiffening sheet; and compressing the diaphragm raw material and the stiffening sheet through compression molding to form a diaphragm which has a center part and a dangling edge part surrounding and connecting the center part. As the stiffening sheet is uniformly coated with the hot melt adhesive layer in advance and then placed on the diaphragm raw material for heating and bonding, the amount of adhesive can be easily controlled, the problem that the adhesive is too much or too little in bonding is avoided, the process is relatively simple, and high strength of adhesion is achieved.

Description

technical field [0001] The invention relates to the field of loudspeakers, in particular to a method for manufacturing a stiffened diaphragm and a diaphragm manufactured by the method. Background technique [0002] With the development of smart phones, the research and development trend of micro speakers has also been driven. In order to enable the speaker to output sound with superior acoustic characteristics, various diaphragm materials have been continuously developed. Among them, some speakers adopt the design of composite diaphragm. [0003] The traditional manufacturing method of the composite diaphragm is to pre-form the raw material of the diaphragm by pressing and forming, so that the raw material of the diaphragm first forms the central part and the hanging edge around the outer edge of the central part. Afterwards, prepare the stiffening sheet, cut the stiffening sheet according to the size and shape of the central part, and position it on the central part befor...

AI Technical Summary

Problems solved by technology

[0004]However, when the traditional composite diaphragm is manufactured, in order to allow the cut stiffening sheet to be attached above the central part and tightly bonded to the central part, The two must be positioned accurately, which will not only increase the complexity of the manufacturing process, but may also cause a decrease in yield

Furthermore, the traditional manufacturing method is also prone to the problem of too much or too little glue. If the glue is too much, the glue may overflow the edge of the stiffening sheet, which will affect the overall sensitivity of the diaphragm; If the amount of glue is too small, the problem of insufficient bonding strength between the central part and the stiffening sheet may occur, so that the stiffening sheet is easily peeled off from the central part when the diaphragm vibrates violently

Images