CN202261788U

CN202261788U - Simple electret microphone

Info

Publication number: CN202261788U
Application number: CN2011203012290U
Authority: CN
Inventors: 常勇; 杨辉光; 周志强
Original assignee: Transound Electronics Co Ltd
Current assignee: Transound Electronics Co Ltd
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2012-05-30
Anticipated expiration: 2021-08-18

Abstract

The utility model discloses a simple electret microphone, comprising a housing, wherein the bottom of the housing is provided an integrally-formed bottom plate used as a back pole plate, the bottom plate is provided with a sound hole, on the bottom plate of the housing there are orderly provided an insulating gasket, a membrane group and a circuit board from inside to outside, the membrane group comprises a metal connection ring and a membrane connected with the bottom end of the metal connection ring, and the outer side surface of the metal connection ring is covered with an insulating layer. Therefore, through integrating the metal connection ring, the membrane and an insulating back pole seat in the prior art into an integrated membrane group, and using the bottom plate provided with the sound hole, of the housing as the back pole plate, the back pole plate member in the prior art is omitted, and the insulating back pole seat in the prior art is also omitted, thereby greatly reducing product component quantity and simplifying assembling process, and effectively increasing product production efficiency and qualified rate; and on the other hand, the electret microphone with such structure can be made smaller in volume and can be applied to miniaturization electric products.

Description

The simple type electret microphone

Technical field

The utility model relates to the microphone art, refers in particular to a kind of simple type electret microphone.

Background technology

Electret microphone has that volume is little, simple in structure, electroacoustic performance is good, frequency is wide, low cost and other advantages, and it is widely used in: fields such as telephone set, intercom, voice-operated device, mobile phone, headset, watch-dog, hearing aids, MP3, MP4, digital camera.

Electret microphone in the prior art; It mainly includes shell, the zona that stretches tight, vibrating diaphragm, insulation spacer, insulation back-pole base, back pole plate, metal connecting ring, wiring board etc.; Because it is more that it forms member, bother during assembling, what in processing procedure, produced is bad corresponding also more; Simultaneously, produce also very difficult raising of efficient of product.

By this, need work out a kind of new technical scheme and solve the problems referred to above.

The utility model content

In view of this, the utility model is to the disappearance of prior art existence, and its main purpose provides a kind of simple type electret microphone, and it has simplified product parts quantity and assembling process, has improved production efficient and yields greatly.

For realizing above-mentioned purpose, the utility model adopts following technical scheme:

A kind of simple type electret microphone comprises shell, and this outer casing bottom is one-body molded to have the base plate that serves as back pole plate, and this base plate is offered sound hole, and this shell is stacked with insulation spacer, diaphragm group and wiring board from inside to outside successively on base plate; Wherein, this diaphragm group comprises metal connecting ring and the diaphragm that sticks at this metal connecting ring bottom, and this metal connecting ring outer surface is coated with an insulating barrier.

As a kind of preferred version, the metal oxide layer that said insulation series of strata are formed through oxidation processes by metal connecting ring outer surface.

As a kind of preferred version, said insulation series of strata are covered on the dielectric film of metal connecting ring outer surface.

As a kind of preferred version,, establish in floor below and to be covered with the Air Filter that is used to cover hole to the sound hole on the aforementioned base plate.

The utility model compared with prior art has tangible advantage and beneficial effect, particularly, can be known by technique scheme:

Main system is through the diaphragm group of formula that the metal connecting ring in the conventional art, diaphragm and insulation back-pole base are combined as a whole; With the base plate of offering sound hole of shell as back pole plate; Save the back pole plate member in the conventional art, and saved the insulation back-pole base in the conventional art; By this, on the one hand, simplify product parts quantity and assembling process greatly, effectively improved production efficient and yields; On the other hand, the electret microphone of this kind structure, its volume can be done forr a short time, and it is more suitable for being applied in the microminiaturized electronic product;

Next is; The utility model system is through forming metal oxide layer in metal connecting ring outer surface through oxidation processes; Perhaps directly paste the insulation back-pole base that one deck dielectric film serves as conventional art in metal connecting ring outer surface, its technology is simple, and cost of manufacture is lower.

Be architectural feature and the effect of more clearly setting forth the utility model, come the utility model is elaborated below in conjunction with accompanying drawing and specific embodiment.

Description of drawings

Fig. 1 is the assembling sectional view of the preferred embodiment of the utility model;

Fig. 2 is the cross section exploded view of the preferred embodiment of the utility model.

The accompanying drawing identifier declaration:

10, shell 11, base plate

111, sound hole 20, insulation spacer

30, diaphragm group 31, metal connecting ring

32, diaphragm 33, insulating barrier

40, wiring board 50, Air Filter.

Embodiment

Shown in please seeing figures.1.and.2; It has demonstrated the concrete structure of the preferred embodiment of the utility model; Comprise shell 10; These shell 10 bottoms are one-body molded to have the base plate 11 that serves as back pole plate, and this base plate 11 is offered sound hole 111, and this shell 10 is stacked with insulation spacer 20, diaphragm group 30 and wiring board 40 from inside to outside successively on base plate 11; Wherein, this diaphragm group 30 comprises metal connecting ring 31 and the diaphragm 32 that sticks at these metal connecting ring 31 bottoms, and these metal connecting ring 31 outer surfaces are coated with an insulating barrier 33.

Need to prove; This insulating barrier 33 can be the metal oxide layer of metal connecting ring 32 outer surfaces through oxidation processes formation; Perhaps for being covered on the dielectric film of metal connecting ring 32 outer surfaces, to strengthen the insulating capacity between metal connecting ring 32 outer surfaces and shell 10 inboards.

And, to the sound hole 111 on the aforementioned base plate 11, establish in base plate 11 belows and to be covered with the Air Filter 50 that is used to cover hole 111.

The design focal point of the utility model is; Main system is through the diaphragm group of formula that the metal connecting ring in the conventional art, diaphragm and insulation back-pole base are combined as a whole; With the base plate of offering sound hole of shell as back pole plate; Save the back pole plate member in the conventional art, and saved the insulation back-pole base in the conventional art; By this, on the one hand, simplify product parts quantity and assembling process greatly, effectively improved production efficient and yields; On the other hand, the electret microphone of this kind structure, its volume can be done forr a short time, and it is more suitable for being applied in the microminiaturized electronic product;

The above; It only is the preferred embodiment of the utility model; Be not that the technical scope of the utility model is done any restriction; So every technical spirit according to the utility model all still belongs in the scope of the utility model technical scheme any trickle modification, equivalent variations and modification that above embodiment did.

Claims

1. simple type electret microphone; Comprise shell; It is characterized in that: this outer casing bottom is one-body molded to have the base plate that serves as back pole plate, and this base plate is offered sound hole, and this shell is stacked with insulation spacer, diaphragm group and wiring board from inside to outside successively on base plate; Wherein, this diaphragm group comprises metal connecting ring and the diaphragm that sticks at this metal connecting ring bottom, and this metal connecting ring outer surface is coated with an insulating barrier.

2. simple type electret microphone according to claim 1 is characterized in that: the metal oxide layer that said insulation series of strata are formed through oxidation processes by metal connecting ring outer surface.

3. simple type electret microphone according to claim 1 is characterized in that: said insulation series of strata are covered on the dielectric film of metal connecting ring outer surface.

4. simple type electret microphone according to claim 1 is characterized in that: be directed against the sound hole on the aforementioned base plate, establish in floor below and be covered with the Air Filter that is used to cover hole.