Composite sound film structure and composite technology thereof

Abstract

The invention relates to the technical field of sound films, in particular to a composite sound film structure which comprises an engineering thin film and a composite sheet arranged at the bottom of the engineering thin film in a composite mode. A thin film fixing ring is formed at the edge of the bottom of the engineering thin film through heat bonding glue in a heat press mode. The thin film fixing ring is a PET thin film fixing ring or a PEN thin film fixing ring. Due to the fact that the PET thin film and the PEN thin film have the advantages of being easy to form, free of rust or oxidation, small in thickness, low in cost, convenient to operate and the like. Thus, compared with an existing composite sound film which is strengthened with a fixing ring or a paper ring, the PET thin film fixing ring or the PEN thin film fixing ring is used by the composite sound film, and the composite sound film has the advantages of being stable in performance, low in production cost, simple in production technology, small in thickness, stable in appearance, capable of not machining a third party and the like. In addition, the invention further discloses a composite technology of the composite sound film, wherein the composite technology is simple and low in production cost.

Description

technical field [0001] The invention relates to the technical field of sound membranes, in particular to a structure of a composite sound membrane and a composite process thereof. Background technique [0002] At present, the sound film (also known as the sound film or vibrating piece, the following description is collectively referred to as the sound film) used by the micro-speaker generally has the following types of structures: [0003] 1. Overlap and combine two or more film materials (such as PET, PEI, PEN, PEEK, PAR and other engineering films) with a thermoforming machine for thermocompression molding, and then cut the formed semi-finished sound film (die-cut) into a sound film single product. The disadvantage of this kind of sound film is that because the thickness of the film material generally used as a sound film is very thin (between a few microns and tens of microns), the single sound film is very soft and easily deformed, resulting in The external dimensions ...

AI Technical Summary

Problems solved by technology

Although this kind of sound film solves the soft defect of the first kind of sound film by adding a fixed ring, the cost is also greatly increased, especially the addition of metal rings (currently most of them are copper rings), which must be delivered to Third-party processing, and the metal ring will be easily oxidized and rusted after high-temperature hot-pressing. At the same time, it is necessary to divide the direction of the metal ring, spray glue and dry it before hot-pressing. At the same time, it increases the structural thickness of the sound film. It is an obstacle to the small size and thin design of the current micro-speaker, and the paper ring is relatively unstable and difficult to miniaturize

Images