CN202168203U

CN202168203U - Compound diaphragm and loudspeaker using same

Info

Publication number: CN202168203U
Application number: CN2011202376105U
Authority: CN
Inventors: 朱秉科
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Acoustic Technologies Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Technologies Holdings Changzhou Co Ltd
Priority date: 2011-07-07
Filing date: 2011-07-07
Publication date: 2012-03-14
Anticipated expiration: 2021-07-07

Abstract

The utility model relates to a compound diaphragm and a loudspeaker using same. The compound diaphragm comprises a substrate layer, wherein the substrate layer comprises an upper surface and an opposite lower surface. The compound diaphragm further comprises a polyetherimide film arranged at the upper surface of the substrate layer and a polyarylate film arranged at the lower surface of the substrate layer. The compound diaphragm can effectively improve distortion of the loudspeaker, and is low in production cost, high in diaphragm vibration intensity and simple in manufacturing process.

Description

Composite diaphragm and use the loud speaker of this composite diaphragm

[technical field]

The utility model relates to a kind of vibrating diaphragm, relates in particular to the composite diaphragm in the vibrating diaphragm and uses the loud speaker of this composite diaphragm.

[background technology]

Improving constantly of As market, electronic device such as mobile phone etc. develops to the slimming direction gradually, and requires its sound quality to become better and better, and this just requires the acoustical device in the mobile phone to develop towards miniature, slim, high tone quality direction.Vibration is the core component of acoustical device such as loud speaker, and the requirement of its acoustical behavior is also just improved thereupon.

Vibrating diaphragm in correlation technique is to form through single cloth film or the compacting of other hot pressing moulding material.Yet the vibrating diaphragm of this structure because rigidity is not enough, is easy to generate and cuts apart vibration when high frequency, influences distortion and sense of hearing.In addition, in practical application, when not influencing tonequality the intensity that improves vibrating diaphragm; Way commonly used in the industry is for increasing the thickness in some areas on the vibrating diaphragm;, vibrating diaphragm thickness everywhere was identical after the vibrating diaphragm that homogenous material is processed was pressed into, and can not satisfy above-mentioned requirement.

Therefore, be necessary to provide a kind of new composite diaphragm to overcome above-mentioned shortcoming.

[utility model content]

It is high that the purpose of the utility model is to solve traditional vibrating diaphragm distortion, the deficiency that oscillation intensity is low, and a kind of composite diaphragm is provided and uses the loud speaker of this composite diaphragm:

A kind of composite diaphragm comprises substrate layer, and said substrate layer is provided with upper surface and opposing lower surface, and said composite diaphragm also comprises PEI film that is located at the substrate layer upper surface and the polyarylate film that is located at the substrate layer lower surface.

Preferably, said composite diaphragm also comprises the glue layer that covers the substrate layer upper and lower surfaces, and said PEI film and polyarylate film are pasted the upper and lower surfaces at substrate layer respectively through glue layer.

The utility model also provides a kind of loud speaker, and said loud speaker comprises described composite diaphragm.

The beneficial effect of the utility model is: the composite diaphragm that the utility model provides can improve effectively that loudspeaker distortions, production cost are low, vibrating diaphragm oscillation intensity height and production process are simple.

[description of drawings]

Fig. 1 is the three-decker sketch map of the composite diaphragm that provides of the utility model;

Fig. 2 is the five-layer structure sketch map of the composite diaphragm that provides of the utility model;

Fig. 3 is to use the three-dimensional exploded view of the embodiment loud speaker of composite diaphragm among Fig. 1.

[embodiment]

Below in conjunction with accompanying drawing and execution mode the utility model is described further.

As shown in Figure 1; The utility model provides a kind of composite diaphragm 1, and said composite diaphragm 1 comprises substrate layer 10, and this substrate layer 10 can be selected polyester film material; Be that benzene dicarboxylic acid butanediol ester (polybutylene terephthalate is called for short PBT) is made substrate layer 10.

Said substrate layer 10 is provided with upper surface 101 and opposing lower surface 102; Said composite diaphragm 1 also comprises the PEI [Poly (etherimide) that is located at the substrate layer upper surface; Be called for short PEI] film 11 and the polyarylate that is located at the substrate layer lower surface (Polyarylate is called for short PAR) film 12.

And PEI (PEI) material and polyarylate (PAR) material have extraordinary thermal endurance; So substrate layer 10 is selected the good benzene dicarboxylic acid butanediol ester of processability (PBT) material for use; Like this when using hot pressing mode to make composite diaphragm 1; The material internal loss is few, has improved thermal endurance simultaneously, can make the frequency characteristic smoothing more of the composite diaphragm of making 1.

As shown in Figure 2; A kind of five-layer structure of the composite diaphragm 1a that the utility model provides; Promptly the upper and lower surfaces at substrate layer 10a forms glue layer 13a earlier, then PEI (PEI) film 11a and polyarylate (PAR) film 12a is pasted the upper and lower surfaces at substrate layer 10a respectively through this glue layer 13a.

As shown in Figure 3; The loud speaker 2 of the use composite diaphragm 1 that the utility model provides; Said loud speaker 2 also comprises basin frame 20, be housed in magnetic bowl 21 in the basin frame 20, be housed in the magnet steel 22 in the magnetic bowl 21, the pole piece 23 that is attached to magnet steel 22 surfaces and ends is suspended in the voice coil loudspeaker voice coil 24 in magnet steel 22 all side magnetic gap, and these voice coil loudspeaker voice coil 24 other ends are retained on the composite diaphragm 1.

Above-described only is the preferred embodiments of the utility model; Should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; Can also make improvement, but these all belong to the protection range of the utility model.

Claims

1. a composite diaphragm comprises substrate layer, and said substrate layer is provided with upper surface and opposing lower surface, it is characterized in that: said composite diaphragm also comprises PEI film that is located at the substrate layer upper surface and the polyarylate film that is located at the substrate layer lower surface.

2. composite diaphragm as claimed in claim 1 is characterized in that: said composite diaphragm also comprises the glue layer that covers the substrate layer upper and lower surfaces, and said PEI film and polyarylate film are pasted the upper and lower surfaces at substrate layer respectively through glue layer.

3. a loud speaker is characterized in that, said loud speaker comprises claim 1 or 2 described composite diaphragms.