Composite membrane structure, diaphragm and sound generating device

Abstract

The invention discloses a composite film structure, a vibrating membrane and a sound production device. The composite film structure comprises an elastomer layer, a connection adhesive layer and a plastic base material layer; the elastomer layer comprises a first surface and a second surface opposite to the each other; the connection adhesive layer is connected to the first surface of the elastomer layer; the plastic base material layer is connected to the surface, back on to the elastomer layer, of the connection adhesive layer; the ratio of the modulus of the plastic base material layer to the modulus of the elastomer layer is larger than or equal to 10. By the composite film structure, rigidness, resilience and damping performance required for vibration can be achieved at the same time.

Description

technical field [0001] The invention relates to the technical field of sounding devices, in particular to a composite membrane structure, a diaphragm and a sounding device. Background technique [0002] The diaphragm is the core component of the sound generating device. The diaphragm in the existing sound generating device is usually formed by bonding a high-modulus single-layer plastic substrate layer or a multi-layer plastic substrate layer, which has sufficient rigidity, but insufficient resilience and damping; thus, in During the waterproof test, this type of diaphragm undergoes a large-amplitude deformation under the influence of water pressure and after it is taken out of the water, the diaphragm cannot recover from its deformation due to insufficient resilience, so it cannot pass the waterproof test. Contents of the invention [0003] The main purpose of the present invention is to propose a composite membrane structure, so that the diaphragm adopting the composite...

AI Technical Summary

Problems solved by technology

The diaphragm in the existing sound generating device is usually formed by bonding a high-modulus single-layer plastic substrate layer or a multi-layer plastic substrate layer, which has sufficient rigidity, but insufficient resilience and damping; thus, in During the waterproof test, after the diaphragm is taken out of the water due to large-amplitude deformation due to the influence of water pressure, the diaphragm will not be able to recover from its deformation due to insufficient resilience, so it will not pass the waterproof test.

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