CN206433169U

CN206433169U - Microphone device

Info

Publication number: CN206433169U
Application number: CN201720051310.5U
Authority: CN
Inventors: 蔡斌; 魏威
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2017-01-16
Filing date: 2017-01-16
Publication date: 2017-08-22
Anticipated expiration: 2027-01-16

Abstract

A kind of microphone device is provided, including the housing with receiving space, the acoustical generator unit that is contained in the receiving space and extend the shell with containing cavities to be formed in the receiving space from the housing, the shell includes the first openend and the second openend being oppositely arranged, the microphone device also includes the breathable barrier for covering second openend, the housing also include covering first openend and with the sheet metal of the shell injection molding, the breathable barrier, the sheet metal is coaxial with the shell to surround the containing cavities together, filled with sound absorption powder in the containing cavities, the breathable barrier seals the sound absorption powder in the containing cavities.Compared with prior art, increase the intensity of the shell by being molded sheet metal in the outer casing bottom, reduce the thickness of outer shell bottom wall, expand the containing cavities of filling sound absorption powder, improve the low frequency performance of the generator.

Description

Microphone device

【Technical field】

The utility model is related to electroacoustic conversion art, more particularly to a kind of microphone device.

【Background technology】

During the portable type electronic products such as mobile phone are fast-developing, user is more next to the Functional Requirement of product Stronger, thus, the development of microphone device is also accordingly accelerated.The microphone device of correlation technique, it include with cavity housing and It is installed on the acoustical generator unit on the housing.Because cavity is enclosed construction and cavity volume is smaller, so microphone device Resonant frequency it is high, cause the low frequency performance of microphone device poor, it is difficult to play out simple and honest abundant bass.Then, microphone device Miniaturization again limit the specification of microphone device, improving the low frequency performance of microphone device by enlarged cavities merely is Difficult to realize.

The problem of in order to improve low frequency performance, the microphone device of correlation technique in back cavity filling sound absorption powder by carrying out Improve, the generator unit that the microphone device includes the housing of tool receiving space and is contained in the receiving space is described Housing includes extending the shell with containing cavities to be formed in the receiving space from the housing, is filled in the containing cavities Sound absorption powder and the sound absorption powder is sealed in the breathable barrier in the receiving space, the shell is outside plastics Shell, it includes bottom wall and from the bottom wall to the side wall extended away from the bottom wall direction, bottom wall and the integrated shaping of side wall, To ensure the intensity of shell, the wall thickness of bottom wall is thicker, takes the receiving space of filling sound absorption powder, reduces low frequency performance.

Therefore, it is necessary that providing a kind of new microphone device solves the above problems in fact.

【Utility model content】

The purpose of this utility model be provide it is a kind of the outer casing bottom be molded sheet metal enhancing shell intensity with The technical scheme that bottom wall wall thickness expands filling sound absorption powder receiving space is reduced, makes microphone device that there is more preferable low frequency performance.

In order to solve the above-mentioned technical problem, a kind of microphone device is devised, it includes the housing with receiving space, housed Prolong in the acoustical generator unit in the receiving space with vibrating diaphragm and from the shell inner surface towards the receiving space The shell of containing cavities is stretched and is surrounded with the housing, the housing correspondence offers the connection containing cavities and opened with extraneous first Mouth end, the shell is open including being located in the receiving space and connecting the receiving space with the second of the containing cavities End, it is characterised in that the microphone device further comprises the breathable barrier for covering second openend, and the housing enters One step include covering first openend and with the sheet metal of the shell injection molding, the sheet metal and the shell and The breathable barrier surrounds the containing cavities jointly, and the microphone device further includes being filled in the containing cavities Absorb sound powder, and the breathable barrier seals the sound absorption powder in the containing cavities.

It is preferred that, the breathable barrier is non-woven fabrics, nylon mesh grid, wool weaving net, wire netting or paper.

It is preferred that, the shell includes the barricade extended to from the inner surface of the housing in the receiving space, described One end of inner surface of the barricade away from the housing surrounds second openend.

It is preferred that, the housing is included away from the first surface of the shell and from the first surface to close to the shell The inner surface direction of body is recessed the step installation portion to be formed, and the step installation portion is around being located at first openend periphery.

It is preferred that, the sheet metal includes the main part for covering first openend and bent from the main part edge The extension of extension, the main part is installed on the step installation portion and its surface away from the containing cavities and described the One surface is generally aligned in the same plane, and the extension is integrated with housing injection.

It is preferred that, the sheet metal further comprises from the location division of the main part die stamp and through the positioning The perforate in portion, the sound absorption powder is packed into the containing cavities through the perforate.

It is preferred that, the microphone device further includes the closure for covering the perforate.

It is preferred that, the closure is PET film.

It is preferred that, the sheet metal further includes the depressed part formed by die stamp, and the closure is located at institute State depressed part and its shape matches with the depressed part shape.

It is preferred that, the receiving space is divided into the preceding operatic tunes and the rear operatic tunes by the vibrating diaphragm, and the vibrating diaphragm to described with shaking Interval forms the preceding operatic tunes between the housing of film, and the shell is set in the operatic tunes in the rear, the containing cavities and institute State rear operatic tunes connection.

Compared with prior art, the microphone device that the utility model is provided has the advantages that：By described One openend is molded sheet metal, because the intensity of the sheet metal is more than the intensity of plastic casing, relative to the shell of prior art The thickness of body, can do sheet metal is thinner, that is, reduces the thickness of shell described in prior art, expands the filling sound absorption The containing cavities of powder, make the microphone device have more preferable audio performance.

【Brief description of the drawings】

The perspective exploded view for the microphone device that Fig. 1 provides for the utility model；

Fig. 2 is the three-dimensional assembling schematic diagram of microphone device shown in Fig. 1；

Fig. 3 is another angle decomposition schematic diagram of the housing of microphone device shown in Fig. 1；

Fig. 4 is sectional view of the microphone device along A-A shown in Fig. 2.

【Embodiment】

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.

Please refer to Fig. 1 to Fig. 4, the perspective exploded view for the microphone device that Fig. 1 provides for the utility model；Fig. 2 The three-dimensional assembling schematic diagram of microphone device shown in Fig. 1；For the housing of microphone device shown in Fig. 1, another angle decomposition shows Fig. 3 It is intended to；Fig. 4 is sectional view of the microphone device along A-A shown in Fig. 2.The utility model provides a kind of microphone device 100, and it includes Housing 10 with receiving space 11, the acoustical generator unit 30 being contained in the receiving space 11, breathable barrier 50 and Absorb sound powder 70.

It is provided with to extend to be formed from the housing 10 in the housing 10 and there are containing cavities in the receiving space 11 13A shell 13.

The shell 13, which is opened up, connects the containing cavities 13A and the first extraneous openend 131, meanwhile, shell 13 includes In the receiving space 11 and connect the second openend 133 of the receiving space 11 and the containing cavities 13A, described the One openend 131 and second openend 133 are oppositely arranged.

Sheet metal 15 covers first openend 131, and the breathable barrier 50 covers second openend 133, The sheet metal 15 surrounds the containing cavities 13A jointly with the shell 13 and the breathable barrier 50.The sound absorption powder Material 70 is filled in the containing cavities 13A, and the breathable barrier 50 seals the sound absorption powder 70 in the containing cavities 13A It is interior.

In the inventive solutions, sheet metal 15 and the shell 13 injection molding, it is described outer for increasing The intensity of shell 13, because the metal strength of the sheet metal 15 is more than the intensity of plastics, the thickness of the sheet metal 15 relative to The thickness of prior art plastic casing can be reduced, and increase the volume of the containing cavities 13A, can fill more sound absorption powders 70, improve audio performance.

The acoustical generator unit 30 has vibrating diaphragm 31, and the receiving space 11 is separated into the preceding operatic tunes 111 by the vibrating diaphragm 31 With the rear operatic tunes 113.The vibrating diaphragm 31 and just between the housing 10 of the vibrating diaphragm 31 interval form the preceding operatic tunes 111, it is described The rear operatic tunes 113 is formed between acoustical generator unit 30 and the housing 10.The shell 13 sets the operatic tunes 113 in the rear Interior, the containing cavities 13A is connected with the rear operatic tunes 113.

In this example, the breathable barrier 50 is non-woven fabrics, nylon mesh grid, wool weaving net, wire netting or paper .

It is preferred that, in the inner surface of housing 10 there is bottom wall 135 corresponding with containing cavities 13A, the shell 13 to include The barricade 137 extended to from the periphery of bottom wall 135 in the receiving space 10A.The bottom is run through in first openend 131 Wall 135.One end of inner surface of the barricade 137 away from the housing 10 surrounds second openend 133, and described second opens Mouth end 133 is oppositely arranged with the bottom wall 135.In the present embodiment, the aperture area of second openend 133 is the bottom The area of wall 135 and the area sum of first openend 131.Further, the bottom wall 135 is included away from described outer The first surface 1351 of shell 13 and it is recessed what is formed from the first surface 1351 to close to the inner surface direction of the housing 10 Step installation portion 1353, the step installation portion 1353 is around being located at the periphery of the first openend 131 and for installing the gold Belong to piece 15.

It is preferred that, the sheet metal 15 includes the main part 151 for covering the first end 131 and from the main part The extension 153 of 151 edges bending extension.The main part 151 is installed on the step installation portion 1353 and it is away from institute The surface and the first surface 1351 for stating containing cavities 13A are generally aligned in the same plane.The extension 153 and the note of bottom wall 135 Modeling is integrated.

It is preferred that, the sheet metal 15 further includes from the location division 155 of the die stamp of main part 151 and passed through The perforate 157 of the location division 155 is worn, the sound absorption powder 70 is packed into the containing cavities 13A through the perforate 157.

In the present embodiment, the location division 155 is circular protrusions structure, and the perforate 157 is also round hole, and its Area is less than the area of the location division 155.The location division 155 that mode preferably by die stamp shapes is depression Portion 159.

It is preferred that, the microphone device 100 further includes the closure 90 for being used to seal the perforate 157, described The shape of closure 90 and the shape of the depressed part 159 match, and in the depressed part 159, now, the sealing Lid 90 and both surfaces away from the containing cavities 13A of the main part 151 are generally aligned in the same plane.In the present embodiment, it is described Closure 90 is PET film.

In the present embodiment, the whole bottom of the housing 10 is molded with one into the sheet metal of shaping.

The microphone device 100 that the utility model is provided has the advantages that：By being opened the first of the shell 13 Mouth end 131 injection sheet metal 15, because the intensity of the sheet metal is more than the intensity of plastic casing, relative to the bottom of prior art The thickness of wall, can do sheet metal is thinner, that is, reduces the thickness of the bottom wall of shell described in prior art, expands filling institute The containing cavities 13A of sound absorption powder 70 is stated, makes the microphone device 100 that there is more preferable low frequency performance.

Above-described is only embodiment of the present utility model, it should be noted here that for the ordinary skill of this area For personnel, on the premise of the utility model creation design is not departed from, improvement can also be made, but these belong to this practicality New protection domain.

Claims

1. a kind of microphone device, it includes the housing with receiving space, the vibrating diaphragm that has being contained in the receiving space Acoustical generator unit and from the shell inner surface towards the receiving space in extension and surround the outer of containing cavities with the housing Shell, the housing correspondence, which is offered, connects the containing cavities and the first extraneous openend, and the shell includes being located at described receive Hold in space and connect the second openend of the receiving space and the containing cavities, it is characterised in that the microphone device enters One step includes the breathable barrier for covering second openend, the housing further comprise covering first openend and With the sheet metal of the shell injection molding, the sheet metal surrounds the receipts jointly with the shell and the breathable barrier Receive chamber, the microphone device further includes the sound absorption powder being filled in the containing cavities, the breathable barrier is by institute Sound absorption powder is stated to seal in the containing cavities.

2. microphone device according to claim 1, it is characterised in that the breathable barrier is non-woven fabrics, nylon braiding Net, wool weaving net, wire netting or paper.

3. microphone device according to claim 1, it is characterised in that the shell includes prolonging from the inner surface of the housing The barricade in the receiving space is extended, one end of inner surface of the barricade away from the housing surrounds second opening End.

4. microphone device according to claim 3, it is characterised in that the housing includes the first table away from the shell Face and it is recessed the step installation portion to be formed from the first surface to the inner surface direction close to the housing, the step is installed Portion is around being located at first openend periphery.

5. microphone device according to claim 4, it is characterised in that the sheet metal includes covering first openend Main part and from the main part edge bend extension extension, the main part be installed on the step installation portion and Its surface away from the containing cavities is generally aligned in the same plane with the first surface, and the extension is molded into one with the housing Body.

6. microphone device according to claim 5, it is characterised in that the sheet metal further comprises from the main part The location division of die stamp and the perforate through the location division, the sound absorption powder are packed into the containing cavities through the perforate It is interior.

7. microphone device according to claim 6, it is characterised in that the microphone device further includes sealing covering The closure of the perforate.

8. the microphone device according to claim requirement 7, it is characterised in that the closure is PET film.

9. microphone device according to claim 8, it is characterised in that the sheet metal further includes by die stamp The depressed part of formation, the closure is located at the depressed part and its shape matches with the depressed part shape.

10. microphone device according to claim 1, its spy is, the receiving space is divided into preceding sound by the vibrating diaphragm Chamber and the rear operatic tunes, the vibrating diaphragm and just form the preceding operatic tunes to interval between the housing of the vibrating diaphragm, and the shell is set Put in the operatic tunes in the rear, the containing cavities are connected with the rear operatic tunes.