CN201479362U

CN201479362U - Electret capacitance microphone

Info

Publication number: CN201479362U
Application number: CN2009201618881U
Authority: CN
Inventors: 张胜坤; 杨道沧
Original assignee: Merry Electronics Co Ltd
Current assignee: Merry Electronics Co Ltd
Priority date: 2009-07-16
Filing date: 2009-07-16
Publication date: 2010-05-19
Anticipated expiration: 2019-07-16

Abstract

The utility model relates to an electret capacitance microphone, which comprises a casing, a circuit board, a conducting ring, a vibration member and an insulation ring; the casing has a sound hole to receive the extraneous sound; the circuit board is combined on the open end of the casing; the conducting ring is contained in the casing; one end of the conducting ring has a supporting portion; the end of the supporting portion is laterally extended to form a flange, and is supported on the circuit board; the other end of the conducting ring has an electret portion with an air-hole formed thereon; the vibration member is in electric connection with the circuit board by the casing; the vibration member is vibrated by the sound pressure from the sound hole; the insulation ring is disposed between the conducting ring and the casing for preventing short circuit caused by the conduction of the conducting ring and the casing.

Description

Electret condenser microphone

Technical field

The utility model relates to a kind of capacitance microphone, particularly relates to a kind of electret condenser microphone that prevents the circuit board distortion and then improve sound property.

Background technology

Press, present various production developments are during to certain maturity period, and innovation that can produce or breakthrough are not easy, therefore, each industrial circle actively goes to pinpoint the problems in from every side invariably, to improve existing shortcoming, and then develop the product that more low-cost or high yield, to meet consumption demand.

Please refer to shown in Figure 1ly, be a kind of generalized section of existing known Electret Condencer Microphone.As shown in Figure 1, Electret Condencer Microphone 100 mainly includes a shell 101, a circuit board 102, a conducting ring 103, an electret 104, a vibration component 105, an insulating washer 106 and a dead ring 107.

Shell 101 is provided with a continuant orifice 101a, in order to receive extraneous source of sound, circuit board 102 is fixed in the openend of shell 101, and has a field-effect transistor 102a on the circuit board 102, conducting ring 103 1 ends are connected to circuit board 102, the other end then is connected to electret 104, in order to electrical communication in both, and electret 104 has pore 104a, sound air communication mistake is provided, vibration component 105 is arranged in the shell 101, and via shell 101 and circuit board 102 electric connections, insulating washer 106 is arranged between electret 104 and the vibration component 105, makes vibration component 105 and electret 104 keep a preset space length, and dead ring 107 is installed between shell 101 and the conducting ring 103, forms short circuit in order to prevent shell 101 with conducting ring 103 conductings.

When assembling has known Electret Condencer Microphone now, the openend of shell 101 must be crimped onto on the circuit board 102, make circuit board 102 outer surfaces bear the pressure of shell 101 openends, so will make the periphery of circuit board 102 slightly be bent downwardly, cause sound property to produce mutation.Moreover, because conducting ring 103 is connected to circuit board 102 inner surfaces, conducting ring 103 is less with the contact area of circuit board 102, it is bigger to make that conducting ring 103 acts on the pressure of circuit board 102, thereby circuit board 102 easily produces crooked problems, thus, to cause the circuit, contact etc. of circuit board 102 to produce damage, make the acoustics performance of Electret Condencer Microphone 100 then not good, influence the yield of quality, necessity of improvement is arranged in fact.

This shows that above-mentioned existing capacitance microphone obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of electret condenser microphone of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.

Summary of the invention

The purpose of this utility model is, overcomes the defective that existing capacitance microphone exists, and is to make it prevent the circuit board distortion and a kind of electret condenser microphone of new structure, technical problem to be solved are provided, and then improves sound property, is very suitable for practicality.

The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.According to the electret condenser microphone that the utility model proposes, it comprises a shell, a circuit board, a conducting ring, a vibration component and a dead ring.Shell has a sound hole, circuit board is incorporated into the openend of shell, and pressed by the opening volume of shell, conducting ring is placed in the shell, and conducting ring one end has a support portion, terminal horizontal expansion one flange of support portion, and be supported in circuit board surface, the other end of conducting ring has an electret portion, and it is provided with several pores, and vibration component electrically connects shell, and keep a default spacing with the electret portion of conducting ring, and vibration component is subjected to sound hole input sound press and vibrates, and dead ring is arranged between conducting ring and the shell, prevents conducting ring and shell conducting and forms short circuit.

The purpose of this utility model and solve its technical problem and can also be further achieved by the following technical measures.

Aforesaid electret condenser microphone, wherein said bead stretches out from the end of this support portion.

Aforesaid electret condenser microphone, wherein said bead is perpendicular to this support portion.

Aforesaid electret condenser microphone is provided with an insulating washer between the electret portion of wherein said conducting ring and this vibration component.

Aforesaid electret condenser microphone, the electret portion periphery of wherein said conducting ring forms an insulation division.

Aforesaid electret condenser microphone, wherein said insulation division extends towards this vibration component, so that this electret portion and this vibration component keep presetting spacing.

By technique scheme, the utility model electret condenser microphone has following advantage and beneficial effect at least: by the sectional area of the bead of conducting ring greater than the support portion, it is bigger to make conducting ring be supported in the area of circuit board, can effectively reduce the stress on the surface that acts on circuit board, avoid circuit board pressed and the support of conducting ring and produce bending by the volume of shell, produce mutation with the acoustic characteristic that reduces electret condenser microphone.

Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.

Description of drawings

Fig. 1 is the generalized section of existing known Electret Condencer Microphone.

Fig. 2 is the exploded view of the utility model electret condenser microphone.

Fig. 3 is the profile of the utility model electret condenser microphone.

Fig. 4 is another embodiment exploded view of the utility model electret condenser microphone.

Fig. 5 is another embodiment profile of the utility model electret condenser microphone.

1: electret condenser microphone 10: shell

11: sound hole 20: circuit board

21: electronic component 30: conducting ring

31: support portion 32: bead

33: electret portion 34: pore

35: insulation division 40: vibration component

41: vibrating membrane 42: retainer ring

50: insulating washer 60: dead ring

100: Electret Condencer Microphone 101: shell

101a: continuant orifice 102: circuit board

102a: field-effect transistor 103: conducting ring

104: electret 104a: pore

105: vibration component 106: insulating washer

107: dead ring

Embodiment

For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its embodiment of electret condenser microphone, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.

Below, be illustrated according to graphic electret capacitor (electret condenser) microphone embodiment with regard to the utility model.

Please refer to Fig. 2 and shown in Figure 3, be the exploded view and the profile of the utility model electret condenser microphone.Electret condenser microphone 1 comprises that a shell 10, a circuit board 20, a conducting ring 30, a vibration component 40, an insulating washer 50 and a dead ring 60 constitute.

Shell 10 1 ends are provided with a sound hole 11, and the other end then forms an openend.Circuit board 20 is arranged at the openend of shell 10, and circuit board 20 carries an electronic component 21, and electronic component 21 for example is a field-effect transistor and a capacitor etc.

Conducting ring 30 at one end is provided with a support portion 31, its end bead 32 that laterally vertically stretches out, the external diameter of bead 32 is greater than the external diameter of support portion 31, and bead 32 is vertical with support portion 31, in addition, the other end of conducting ring 30 is provided with an electret portion 33, have free charge through hyperpolarization on it, and electret portion 33 is provided with several pores 34.Wherein, conducting ring 30 utilizes the bead 32 of support portion 31 to be connected to the surface that circuit board 20 is provided with electronic component 21.

Vibration component 40 comprises the retainer ring 42 that a vibrating membrane 41 and a metal material are made, and retainer ring 42 is in order to support fixation vibrating membrane 41, and vibration component 40 is arranged at shell 10 inside, and retainer ring 42 electrically connects via shell 10 and circuit board 20.Insulating washer 50 is arranged between the electret portion 33 and vibration component 40 of conducting ring 30, makes the vibrating membrane 41 of vibration component 40 and conducting ring 30 keep a determining deviation.

Dead ring 60 is arranged between shell 10 and the conducting ring 30, prevents that conducting ring 30 from forming short circuit with shell 10 conductings.Wherein, dead ring 60 also is positioned on the bead 32 of conducting ring 30.

In external sound source enters shell 10, vibrating membrane 41 be subjected to the sound airstream vibration and and the distance between the electret portion 33 change, and then cause capacitance between the two to change, and be passed to circuit board 20, handle via electronic component, make it to convert to corresponding electric signal.

Please referring again to shown in Figure 3, circuit board 20 of the present utility model is arranged on the openend of shell 10, and circuit board 20 is subjected to the curling of openend of shell 10 and exerts pressure, and be connected to circuit board 20 by the bead 32 of conducting ring 30, to form holding state, because the sectional area of bead 32 is greater than support portion 31, it is bigger to make conducting ring 30 be supported in the area of circuit board 20, can effectively reduce the stress that acts on circuit board 20, avoid circuit board 20 pressed and the support of conducting ring 30 and produce distortion by the volume of shell 10, to reduce the mutation of acoustic characteristic with crooked.

Edge this, the utility model is compared to existing conventional construction, conducting ring 30 is connected to circuit board 20 with the bead 32 of outside dimension maximum, has the effect that prevents circuit board 20 distortion, has promoted the yield and the quality reliability of product greatly.

Please refer to Fig. 4 and shown in Figure 5, be exploded view and the profile thereof of another embodiment of the utility model electret condenser microphone.Compared to the foregoing description, present embodiment has lacked insulating washer 50, and being directions towards vibration component 40, the support portion 31 of conducting ring 30 more is extended with an insulation division 35, so that the vibration component 40 of electret condenser microphone 1 directly is connected to the insulation division 35 of conducting ring 30, and make the vibrating membrane 41 and the electret portion 33 of conducting ring 30 keep a determining deviation, and in order to simplify whole member and to reduce the fraction defective that is produced when assembling.

Similarly, circuit board 20 in the present embodiment is arranged on the openend of shell 10, and circuit board 20 is subjected to the curling of openend of shell 10 and exerts pressure, and be connected to circuit board 20 by the bead 32 of conducting ring 30, to form holding state, because the sectional area of bead 32 is greater than support portion 31, it is bigger to make conducting ring 30 be supported in the area of circuit board 20, can effectively reduce the stress that acts on circuit board 20, avoid circuit board 20 pressed and the support of conducting ring 30 and produce distortion by the volume of shell 10, to reduce the mutation of acoustic characteristic with crooked.

Comprehensively above-mentioned, electret condenser microphone of the present utility model, it utilizes the end in support portion of conducting ring to be provided with the bead of horizontal expansion, the sectional area that makes bead is greater than the support portion, and the bead of utilizing conducting ring is supported in circuit board surface, can increase contact area, when the volume that so makes circuit board bear the shell aperture end is pressed, have preferable support strength, simultaneously, the increase of contact area, conducting ring act on the active force of circuit board surface, and then relative is smaller, so, can avoid the flexural deformation of circuit board, reduce the acoustic characteristic mutation of electret condenser microphone, promote the reliability of product effectively.

In addition, because the support portion and the electret portion of conducting ring are formed in one, compared to existing conventional construction, overall structure is comparatively simplified, and so can avoid the generation of the cumulative limit of member, and effectively reduces the generation of the fraction defective of product.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1. electret condenser microphone is characterized in that it includes:

One shell, the one end is an openend, and the other end is provided with a sound hole;

One circuit board is incorporated into the openend of this shell;

One conducting ring is placed in this shell, and this conducting ring one end has a support portion, terminal horizontal expansion one flange of this support portion, and be connected to this circuit board, the other end of this conducting ring has an electret portion and which is provided with several pores;

One vibration component electrically connects this shell, and keeps a default spacing with the electret portion of this conducting ring, and this vibration component is subjected to this sound hole input sound press and vibrates; And

One dead ring is arranged between this conducting ring and this shell, prevents this conducting ring and this shell conducting and causes short circuit.

2. electret condenser microphone according to claim 1 is characterized in that wherein said bead stretches out from the end of this support portion.

3. electret condenser microphone according to claim 2 is characterized in that wherein said bead is perpendicular to this support portion.

4. electret condenser microphone according to claim 1 is characterized in that being provided with an insulating washer between the electret portion of wherein said conducting ring and this vibration component.

5. electret condenser microphone according to claim 1 is characterized in that the electret portion periphery of wherein said conducting ring forms an insulation division.

6. electret condenser microphone according to claim 5 is characterized in that wherein said insulation division extends towards this vibration component, so that this electret portion and this vibration component keep presetting spacing.