CN201263216Y

CN201263216Y - Microphone

Info

Publication number: CN201263216Y
Application number: CNU2008201465400U
Authority: CN
Inventors: 周成军; 方涛; 高延圣
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd
Priority date: 2008-08-08
Filing date: 2008-08-08
Publication date: 2009-06-24
Anticipated expiration: 2018-08-08

Abstract

The utility model discloses a microphone, which comprises a shell, a vibrating diagram group contained in the shell and a gasket placed on the vibrating diagram group; the vibrating diagram group is provided with a diagram and a stretched diagram ring supporting the diagram; a plurality of side walls are arranged surrounding the stretched diagram ring, wherein, a plurality of heaves capable of pushing against the shell are extended from each side wall of the stretched diagram ring to the direction far from the stretched diagram ring. When the stretched diagram ring is coordinated with the shell, the heave has an orientating function and can accurately locate the whole stretched diagram ring in the shell, thus preventing the stretched diagram ring from deviating in the shell and thus improving the performance and yield of the microphone.

Description

Microphone

[technical field]

The utility model relates to a kind of microphone, relates in particular to a kind of microphone with the zona that stretches tight.

[background technology]

As shown in Figure 1-Figure 3, the microphone 100 ' of correlation technique comprise shell 1 ', be contained in vibrating diaphragm group 2 ' in the shell 1 ', be positioned over pad 3 ' on the vibrating diaphragm group 2 ', with the back-pole base 5 ' of pad 3 ' adjacency, be embedded at the back pole plate 4 ' in the back-pole base 5 ', the connecting ring 6 ' that links to each other with back pole plate 4 ' and with the circuit board 7 ' of shell 1 ' electric connection.Back pole plate 4 ', connecting ring 6 ' are contained in the back-pole base 5 ' respectively.Wherein, shell 1 ' roughly is square, and the vibrating diaphragm group 2 ' that matches with shell 1 ' also is square, and described vibrating diaphragm group 2 ' comprises diaphragm 21 ' and supports the zona 22 ' that stretches tight of diaphragm 21 '.

The microphone 100 ' of correlation technique, square vibrating diaphragm group 2 ' needs bigger fit clearance with square shell 1 ' and just realizes assembling automatically easily, but bigger fit clearance can make the zona 22 ' that stretches tight on the vibrating diaphragm group 2 ' that bigger skew is arranged in shell 1 ', for example, as shown in Figure 2, the zona 22 ' that stretches tight offsets to one side in shell 1 '; Or as shown in Figure 3, the zona 22 ' that stretches tight rotates skew in shell 1 '.More than skew all can influence the performance and the rate of finished products of microphone 100 '.

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

[utility model content]

The purpose of this utility model is to provide a kind of stable performance, microphone that rate of finished products is high.

The purpose of this utility model is achieved in that a kind of microphone, it comprises shell, be contained in the vibrating diaphragm group in the shell and be positioned over pad on the vibrating diaphragm group, the vibrating diaphragm group is provided with diaphragm and supports the zona that stretches tight of diaphragm, the described zona that stretches tight is provided with some sidewalls, and each sidewall of the zona that stretches tight certainly is extended with some projectioies that are connected on the shell to the direction away from the zona that stretches tight.

Compared with prior art, the utlity model has following advantage: each sidewall in the zona that stretches tight is provided with some projectioies, when the zona that stretches tight cooperates with shell, the described positioning action that is raised with, can accurately be positioned the whole zona that stretches tight in the shell, the zona that prevents to stretch tight is offset in the enclosure, improves the performance and the rate of finished products of microphone.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of the microphone of correlation technique.

Fig. 2 is pack into schematic diagram in the shell of the zona that stretches tight of the microphone of correlation technique.

Fig. 3 is pack into the schematic diagram of another kind of situation in the shell of the zona that stretches tight of the microphone of correlation technique.

Fig. 4 is the three-dimensional exploded view of microphone of the present utility model.

Fig. 5 is pack into schematic diagram in the shell of the zona that stretches tight of microphone of the present utility model.

[embodiment]

Describe the concrete structure of the utility model microphone 100 in detail below in conjunction with accompanying drawing.

Please join Fig. 4 and shown in Figure 5, the utility model microphone 100 comprises shell 1, be contained in vibrating diaphragm group 2 in the shell 1, be positioned over pad 3 on the vibrating diaphragm group 2, with the back-pole base 5 of pad 3 adjacency, be embedded in the back-pole base 5 and the back pole plate 4 that links to each other with pad 3, be located at back-pole base 5 interior connecting ring 6 and the circuit board 7 that links to each other with connecting ring 6.

Shell 1 is square, it comprises diapire 11, encloses the host cavity 13 that forms from the side wall 12 of diapire 11 extensions and by diapire 11 and side wall 12, offer on the diapire 11 in order to accept first tone-entering hole 14 of outside sound source, so that sound wave can be sent to vibrating diaphragm group 2.This first tone-entering hole 14 can form by any suitable mode (for example boring, punching or molded).Fig. 4 illustrates shell 1 and has one deck at least, and still, shell 1 can be made by a plurality of alternating layers of electric conducting material and non-conducting material, perhaps can apply conductive coating on the non-conductive layer inboard, and vibrating diaphragm group 2 can be electrically connected on the circuit board 7.

Vibrating diaphragm group 2 roughly is square, the zona 22 that stretches tight that it comprises diaphragm 21 and supports diaphragm 21.The thin metal ring that the zona 22 that stretches tight forms for the metallic plate stamping-out, it is enclosed by some sidewalls 221 and forms, and each sidewall 221 of the zona 22 that stretches tight certainly is extended with some projectioies 222 that are connected on the shell to the direction away from the zona 22 that stretches tight.

Pad 3 comprises outer shroud 31 and the centre bore 32 that is centered on by outer shroud 31.This pad 3 is used to make vibrating diaphragm group 2 and other element electricity in the shell 1 to isolate.Pad 3 is made by electrical insulating material, has the thickness that equals spacing between vibrating diaphragm group 2 and the back pole plate 4.Pad 3 makes that vibrating diaphragm group 2 can be towards back pole plate 4 distortion.Pad 3 can have multiple shape, and needn't be corresponding with shell 1 shape, and can have multiple different size.In the present embodiment, pad 3 is and shell 1 corresponding square configuration.

Back pole plate 4 is provided with some second tone-entering holes 41, has electret on the one side away from circuit board 7 on it, and electret is a kind of dielectric that can keep the electric polarization state for a long time, and this dielectric is a kind of high molecular polymer, is distributed with free charge on the electret.Owing to be distributed with free charge on the electret, so between the two poles of the earth of the capacitor that forms between vibrating diaphragm group 2 and the back pole plate 4, the quantity of electric charge has just been arranged, when sound wave makes vibrating diaphragm group 2 vibration and when producing displacement, changed the capacitance of capacitor, the change of capacitance makes the output of capacitor produce corresponding alternating electric field, just formed the signal of telecommunication corresponding, so just finished the function of acoustic-electric conversion with acoustic signals.

Back-pole base 5 is provided with sidewall 51 and is made up of the through hole 52 that sidewall 51 is enclosed to form.Back-pole base 5 can be made multiple shape and size to adapt to the needs of application.

Connecting ring 6 is an electric conductor, and it also can form with shell 1 shape and size or according to other shape and size of concrete application.Connecting ring 6 in the form of a ring in the present embodiment.

Circuit board 7 can with shell 1 coaxial alignment, it can form with shell 1 corresponding multiple shape and size or according to other shape and size of concrete application.Described circuit board 7 be provided with back-pole base 5 contacted positive 71 and with positive 71 relative reverse side 72, wherein, positive 71 have printed wiring trace (not shown) and a plurality of electronic component (not shown) and discontiguous each other some contact chips 74.

The matching relationship of above-mentioned each element is as follows:

Back pole plate 4 electret is set and be seated in back-pole base 5 on, be electrically connected to simultaneously on the connecting ring 6, connecting ring 6 links to each other with circuit board 7, like this, back pole plate 4 has just electrically connected with circuit board 7; Pad 3 is between back pole plate 4 and vibrating diaphragm group 2, in order to form the gap between back pole plate 4 and vibrating diaphragm group 2; Vibrating diaphragm group 2 places pad 3 times, and is housed in the shell 1 and electrically conducts with shell 1; Shell 1 is electrically connected on the corresponding circuits of circuit board 7.Such matching relationship makes vibrating diaphragm group 2 be electrically connected to circuit board 7, and back pole plate 4 also is electrically connected to circuit board 7, but two circuit are because not directly conducting of the gap that forms between back pole plate 4 and the vibrating diaphragm group 2.

The utility model microphone 100 is provided with some protruding 222 in each sidewall 221 of the zona 22 that stretches tight, when the zona 22 that stretches tight cooperates with shell 1, described protruding 222 are connected on the side wall 12 of shell 1, the whole zona 22 that stretches tight accurately can be positioned in the shell 1, prevent to stretch tight zona 22 at shell 1 bias internal, improve the performance and the rate of finished products of microphone 100.

The above only is a better embodiment of the present utility model; protection range of the present utility model does not exceed with above-mentioned execution mode; as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.

Claims

1. microphone, it comprises shell, be contained in the vibrating diaphragm group in the shell and be positioned over pad on the vibrating diaphragm group, the vibrating diaphragm group is provided with diaphragm and supports the zona that stretches tight of diaphragm, the described zona that stretches tight is provided with some sidewalls, it is characterized in that: each sidewall of the zona that stretches tight certainly is extended with some projectioies that are connected on the shell to the direction away from the zona that stretches tight.