CN209017313U

CN209017313U - A kind of electret microphone

Info

Publication number: CN209017313U
Application number: CN201821853825.8U
Authority: CN
Inventors: 张伙根
Original assignee: JIANGSU HUAFENG ELECTRONICS CO Ltd
Current assignee: JIANGSU HUAFENG ELECTRONICS CO Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2019-06-21
Anticipated expiration: 2028-11-12

Abstract

The utility model provides a kind of electret microphone, include shell, circuit board and vibrating diaphragm, the shell has closed end and open end, the circuit board is mounted on the open end, and the circuit board is equipped with acoustic aperture, it is equipped with ante-chamber between vibrating diaphragm and circuit board, back cavity is equipped between vibrating diaphragm and closed end.Electret microphone in the utility model, since acoustic aperture setting on circuit boards, is conducive to the volume for reducing microphone；And different audio frequency curves can be adjusted by adjusting the size of its back pole plate upper groove, meet the acoustic performance of microphone.

Description

A kind of electret microphone

Technical field

The utility model relates to microphone techniques field more particularly to a kind of electret microphones.

Background technique

Electret microphone is one kind of microphone, is widely applied because of advantage small in size, frequency is wide, at low cost In: the fields such as telephone set, intercom, voice-operated device, mobile phone, headset, monitoring device, hearing aid, MP3, MP4, digital camera.So And the upper electret microphone sold is all made of laggard sound structure on the market, i.e., on the shell by acoustic aperture setting, the laggard sound wheat Gram wind needs one back cavity of additional designs, increases the volume of microphone.

Utility model content

The technical problem to be solved by the utility model is in view of the deficiencies of the prior art, provide a kind of electret mike Wind solves the problems, such as that laggard sound microphone volume is larger.

Technical problem to be solved in the utility model is achieved by the following technical solution:

A kind of electret microphone, includes shell, circuit board and vibrating diaphragm, and the shell has closed end and open end, institute It states circuit board and is mounted on the open end, and the circuit board is equipped with acoustic aperture, and ante-chamber, vibrating diaphragm are equipped between vibrating diaphragm and circuit board Back cavity is equipped between closed end.

Particularly, the vibrating diaphragm use copper ring film, the copper ring film have copper sidewall portion and counterdie, the copper sidewall portion and Accommodation space is formed between the shell side wall of the shell.

Particularly, accommodation space is filled with modeling cavity.

Particularly, the modeling cavity uses annular plastics pipe.

Particularly, back pole plate is equipped between the counterdie and the closed end.

Particularly, the back pole plate has the groove towards the closed end, and the groove, which encloses, to be set to form the back cavity.

Particularly, the back pole plate offers multiple through-holes, and the through-hole is connected to the back cavity.

Particularly, gasket is equipped between the counterdie and the back pole plate.

Particularly, the copper sidewall portion has hollow copper chamber using annular copper pipe, the annular copper pipe.

Electret microphone in the utility model, due on circuit boards, being conducive to reduce microphone acoustic aperture setting Volume；And different audio frequency curves can be adjusted by adjusting the size of its back pole plate upper groove, meet the sound of microphone Energy.

Detailed description of the invention

Fig. 1 is a kind of overall structure diagram of the electret microphone of embodiment in the utility model；

Fig. 2 is the cross-sectional view of electret microphone in Fig. 1；

Fig. 3 is the explosive view of electret microphone in Fig. 1.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Detailed description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation Example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work The every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1 to Figure 3, the electret microphone in the present embodiment includes shell 1, circuit board 2 and vibrating diaphragm 3.Wherein, Shell 1 has open end 11, closed end 12 and shell side wall 13；Circuit board 2 is mounted at the open end 11 of shell 1, and circuit Acoustic aperture 21 is offered on plate 2, the lateral surface of circuit board 2 is equipped with one or more pads 22.It should be noted that circuit board 2 One side towards closed end is medial surface, and another side is then lateral surface.Vibrating diaphragm 2 is installed in shell 1, vibrating diaphragm 2 and circuit board 1 it Between be equipped with ante-chamber 71, between vibrating diaphragm 2 and closed end 12 be equipped with back cavity 72.

According to one embodiment of the application, vibrating diaphragm 3 uses copper ring film, and copper ring film includes counterdie 31 and copper sidewall portion 32, And there is accommodation space between copper sidewall portion 32 and shell side wall 13.Optionally, which need to be packed into various cavitys, with shape The acoustic performance of Cheng Youyi.For example, the accommodation space is filled with modeling cavity 6, such as plastic tube；In another example the accommodation space is filled with The wooden cavity or metal cavity.Wherein, copper sidewall portion 32 itself can also have hollow copper using annular copper pipe, annular copper pipe Chamber.

As shown in Figures 2 and 3, back pole plate 4 is equipped between counterdie 31 and closed end 12, back pole plate has towards closed end 12 Groove 41, which, which encloses, sets to form the back cavity.Particularly, by adjusting the shape of groove or size (i.e. adjustment back cavity Shape or size), can correspond to adjustment microphone different audio frequency curves, to meet the acoustic performance of electret microphone.Certainly, Back pole plate 4 begins with one or more through-holes 42, which is connected to the back cavity.Optionally, counterdie 21 and the back pole plate 4 Between be equipped with gasket 5.

The electret microphone of the present embodiment, since acoustic aperture setting on circuit boards, is conducive to the body for reducing microphone Product；And different acoustic constructions is formed by the structure of back pole plate.Such as the size by adjusting its back pole plate upper groove Different audio frequency curves is adjusted, the acoustic performance of microphone is met.

It should be noted that, in this document, the terms such as term " installation ", " connected ", " connection ", " fixation " should all do broad sense Understand, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；" connected " can be directly Connect it is connected, can also be indirectly connected through an intermediary.It for the ordinary skill in the art, can be according to specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.

In the description of the utility model, it is to be understood that the orientation or positional relationship of the instructions such as term " on ", "lower" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate Or imply that signified device or unit must have specific direction, be constructed and operated in a specific orientation, it is thus impossible to understand For limitations of the present invention.

Relational terms such as first and second and the like are used merely to an entity or operation and another entity Or operation distinguishes, without necessarily requiring or implying between these entities or operation there are any this actual relationship or Person's sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to non-exclusionism include, to make Obtaining the process, method, article or equipment including a series of elements not only includes those elements, but also including not arranging clearly Other element out, or further include for elements inherent to such a process, method, article, or device.Not more In the case where limitation, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element There is also other identical elements in method, article or equipment.

Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into One step is described in detail.It should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced It changes, improve, should be included within the scope of protection of this utility model.

Claims

1. a kind of electret microphone includes shell, circuit board and vibrating diaphragm, the shell has closed end and open end, special Sign is that the circuit board is mounted on the open end, and the circuit board is equipped with acoustic aperture, is equipped between vibrating diaphragm and circuit board Ante-chamber is equipped with back cavity between vibrating diaphragm and closed end.

2. electret microphone as described in claim 1, which is characterized in that the vibrating diaphragm uses copper ring film, the copper ring film With copper sidewall portion and counterdie, accommodation space is formed between the copper sidewall portion and the shell side wall of the shell.

3. electret microphone as claimed in claim 2, which is characterized in that the accommodation space is filled with modeling cavity.

4. electret microphone as claimed in claim 3, which is characterized in that the modeling cavity uses annular plastics pipe.

5. electret microphone as claimed in claim 2, which is characterized in that be equipped with back between the counterdie and the closed end Pole plate.

6. electret microphone as claimed in claim 5, which is characterized in that the back pole plate has towards the closed end Groove, the groove, which encloses, to be set to form the back cavity.

7. electret microphone as claimed in claim 5, which is characterized in that the back pole plate offers multiple through-holes, described Through-hole is connected to the back cavity.

8. electret microphone as claimed in claim 5, which is characterized in that be equipped with pad between the counterdie and the back pole plate Piece.

9. electret microphone as claimed in claim 2, which is characterized in that the copper sidewall portion is described using annular copper pipe Annular copper pipe has hollow copper chamber.