Vibrating diaphragm and micro acoustic generator equipped with vibrating diaphragm

A technology of thin film and adhesive film layer, which is applied in the direction of polymer material diaphragm, non-planar diaphragm/paper cone, sensor, etc., which can solve the difficulty in meeting the requirements of high sound quality, poor stability of micro-speakers, and poor heat resistance of diaphragm To achieve the effect of maintaining long-term stability, high rigidity and improving damping

Active Publication Date: 2016-09-07
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing diaphragm is usually made of single-layer TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer rubber) or TPEE (thermoplastic polyurethane elastomer) film, which has poor heat resistance, poor rigidity and low damping , easy to deform, resulting in poor stability of F0 (resonance frequency) of the miniature sound generator, high total harmonic distortion, and poor sound quality, which is difficult to meet people's requirements for high sound quality of electronic equipment

Method used

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  • Vibrating diaphragm and micro acoustic generator equipped with vibrating diaphragm
  • Vibrating diaphragm and micro acoustic generator equipped with vibrating diaphragm
  • Vibrating diaphragm and micro acoustic generator equipped with vibrating diaphragm

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Effect test

Embodiment approach 1

[0032] like figure 1 As shown, the diaphragm is a three-layer composite structure, consisting of two thermoplastic elastomer layers 20 and a layer of adhesive film 22, the thermoplastic elastomer layer 20 is located on the surface, and the adhesive film layer 22 is sandwiched between the two thermoplastic elastomer layers 20 between. Wherein: two layers of thermoplastic elastomer layers 20 can be selected from the same material, such as a material in TPEE film, TPU film or TPAE film, or two different materials, such as TPEE film and TPU film or TPU film and TPAE film, etc.; the film layer 22 is made of acrylic film or silica gel film.

Embodiment approach 2

[0034] like figure 2 As shown, the diaphragm has a five-layer composite structure, consisting of three thermoplastic elastomer layers 20 and two adhesive film layers 22. The thermoplastic elastomer layers 20 are still located on the surface, and the adhesive film layers 22 are located in the middle and are alternately stacked. Wherein: the three-layer thermoplastic elastomer layer 20 can be selected from the same material, such as a material in TPEE film, TPU film or TPAE film, or two different materials or three different materials; two layers The film layer 22 can be made of the same material, such as one of acrylic film or silicone film, or two different materials, that is, one layer is an acrylic film and the other is a silicone film.

Embodiment approach 3

[0036] like image 3 As shown, the diaphragm is a seven-layer composite structure, consisting of four thermoplastic elastomer layers 20 and three adhesive film layers 22 . Same as the previous two embodiments, the four thermoplastic elastomer layers 20 can all be made of the same material or different materials; the three film layers 22 can also be made of the same material or different materials.

[0037] The vibrating membrane of the present invention is composed of a thermoplastic elastomer layer and an adhesive film layer, has high rigidity and strong heat resistance, effectively improves the damping performance of the micro-speaker, and reduces the total harmonic distortion and damping coefficient of the micro-speaker. The long-term stability of F0 is maintained, and the sound quality of the micro-sounder is greatly improved.

[0038] A miniature sounder comprising the above-mentioned vibrating membrane, including a vibrating system and a magnetic circuit system, the vib...

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Abstract

The invention discloses a vibrating diaphragm and a micro acoustic generator equipped with the vibrating diaphragm, and relates to the technical field of electroacoustic products. The vibrating diaphragm has a multilayer composite structure which comprises thermoplastic elastomer layers and adhesive film layers which are alternately stacked together. According to the vibrating diaphragm and the micro acoustic generator equipped with the vibrating diaphragm, the technical problems in the prior art that a micro loudspeaker has poor F0 stability and high total harmonic distortion can be solved. The vibrating diaphragm and the micro acoustic generator equipped with the vibrating diaphragm are low in total harmonic distortion and damping coefficient, higher in F0 stability and high in sound quality so that the requirements of people for the high sound quality of electronic equipment can be met.

Description

technical field [0001] The invention relates to the technical field of electroacoustic products, in particular to a composite diaphragm and a miniature sound generator provided with the diaphragm. Background technique [0002] Miniature sound generator is an important acoustic component in portable electronic equipment, which is used to convert sound wave electric signal into sound signal, and is an energy conversion device. The micro sounder usually includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil combined together. Important components play a vital role in the sound reproduction performance of the micro-sounder, which determines the conversion quality of the micro-sounder from electrical energy to sound energy. [0003] The existing diaphragm is usually made of single-layer TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer rubber) or TPEE (thermoplastic polyurethane elastomer) film, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/12
CPCH04R7/12H04R7/125H04R2307/025H04R9/025H04R7/122
Inventor 程真真谷建华吴增勋
Owner GOERTEK INC
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