CN104602168B - A kind of Microspeaker module and its design method - Google Patents
A kind of Microspeaker module and its design method Download PDFInfo
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- CN104602168B CN104602168B CN201410849782.6A CN201410849782A CN104602168B CN 104602168 B CN104602168 B CN 104602168B CN 201410849782 A CN201410849782 A CN 201410849782A CN 104602168 B CN104602168 B CN 104602168B
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- back cavity
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Abstract
The invention discloses a kind of Microspeaker module and its design method, wherein, the Microspeaker module includes successively from top to bottom：Upper casing, vibrational system, middle shell, magnetic circuit system, lower casing；Wherein, vibrational system is arranged on middle shell, vibrational system is seamlessly connected with middle shell, it is and by the upper casing that the ante-chamber of the middle shell and back cavity is completely isolated, the perforate of predetermined shape is provided with the cavity wall of back cavity, to be vibrated in vibrational system during ensure back cavity can with the external world formed gas exchanges.The present invention is provided with the perforate of predetermined shape in Microspeaker module in the cavity wall of shell back cavity, ensure that back cavity can form gas exchanges with the external world by the perforate, to provide sufficiently large gas exchanges space, in the case of smaller design space, it ensure that the design requirement of Microspeaker module, solve in the prior art, leave for Microspeaker module design space it is less and less, the problem of can not having met Microspeaker module design demand.
Description
Technical field
The present invention relates to field of mobile communication, more particularly to a kind of Microspeaker module and its design method.
Background technology
The loudspeaker module of mobile phone uses band back cavity to design at present, and back cavity is substantially from 0.5cm3To 1.5cm3.Usual loudspeaker
The structure of module is larger, and its back cavity also corresponds to larger.
But because mobile phone is just thinning down, functional module is more and more, and the space for leaving audio horn module for is more next
It is fewer, it is difficult to meet to give electro-acoustic element 1cm3Requirement.But for existing Microspeaker module, often occur small
In 0.3cm3Situation.
The content of the invention
The invention provides a kind of Microspeaker module and its design method, at least to solve in the prior art, to leave for
The design space of Microspeaker module is less and less, the problem of can not having met Microspeaker module design demand.
On the one hand, the present invention provides a kind of Microspeaker module, includes successively from top to bottom：Upper casing, vibrational system, in
Shell, magnetic circuit system, lower casing；Wherein, the vibrational system is arranged on middle shell, the vibrational system and the middle seamless company of shell
Connect, and it is by the upper casing that the ante-chamber on the middle shell and back cavity is completely isolated, it is provided with the cavity wall of the back cavity predetermined
The perforate of shape, to ensure that back cavity can form gas exchanges with the external world during vibrational system vibration.
Further, middle shell bottom corresponding to chamber is provided with gas channel in the rear, is shaken described in the gas channel connection
Perforate at perforate and middle shell, during being vibrated in the vibrational system, passes through institute by the back cavity at the magnetic cylinder of dynamic system
State gas channel and the perforate and carry out gas exchanges with extraneous.
Further, one end of the gas channel is arranged in the cavity wall of the back cavity, the other end of the gas channel
It is arranged on four angles of the magnetic circuit system.
Further, screen cloth is provided with the rear cavity wall perforate, wherein, the gas permeability and damping and amortization that the screen cloth has.
Further, the quantity of the perforate is four or more.
On the other hand, it is any of the above-described for designing present invention also offers a kind of design method of Microspeaker module
The Microspeaker module of item, including：The preset audio characteristic of Microspeaker module is determined, wherein, the acoustic characteristic is extremely
Include one below less：Resonant frequency F0, frequency response curve Q values；The number of openings of perforate and perforate are total in cavity wall after shell in adjustment
Area, so that the Microspeaker module meets the preset audio characteristic.
Further, methods described also includes：In the case of being provided with screen cloth in the perforate, opening for the screen cloth is adjusted
The acoustic resistance of porosity and screen cloth, so that the Microspeaker module meets the preset audio characteristic.
Further, the acoustic characteristic comprises at least one below：Resonant frequency F0, frequency response curve Q values.
The present invention is provided with the perforate of predetermined shape in Microspeaker module in the cavity wall of shell back cavity, protected by the perforate
Gas exchanges can be formed with the external world by demonstrate,proving back cavity, to provide sufficiently large gas exchanges space, in the case of smaller design space,
The design requirement of Microspeaker module is ensure that, solves the design space in the prior art, leaving Microspeaker module for
It is less and less, the problem of can not having met Microspeaker module design demand.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is Microspeaker module decomposing schematic representation in the embodiment of the present invention；
Fig. 2 is the rearview that the Microspeaker module perforate after screen cloth is stained with the embodiment of the present invention；
Fig. 3 is the profile that the Microspeaker module after screen cloth is stained with the embodiment of the present invention from internal；
Fig. 4 is the schematic diagram being bonded in screen cloth in the embodiment of the present invention in perforate；
Fig. 5 is shell schematic diagram in the Microspeaker module for be provided with the embodiment of the present invention gas channel；
Fig. 6 is the signal that the perforate of back cavity flows outwardly toward with air-flow in gas channel interaction in the embodiment of the present invention
Figure；
Fig. 7 is the middle shell ante-chamber schematic diagram of three dimensional form in the embodiment of the present invention；
Fig. 8 is the middle shell back cavity schematic diagram of three dimensional form in the embodiment of the present invention；
Fig. 9 is the decomposing schematic representation of the Microspeaker module complete machine with screen cloth in the embodiment of the present invention；
Figure 10 is the schematic diagram of the Microspeaker module complete machine with screen cloth in the embodiment of the present invention；
Figure 11 is to change Q value frequency response curve analogous diagrams in the embodiment of the present invention merely；
Figure 12 is to change Q value impedance curve analogous diagrams in the embodiment of the present invention merely；
Figure 13 is to change back cavity equivalent volume frequency response curve analogous diagram in the embodiment of the present invention merely；
Figure 14 is to change back cavity equivalent volume impedance curve analogous diagram in the embodiment of the present invention merely；
Figure 15 is in the embodiment of the present invention while changes back cavity equivalent volume and Q value frequency response curve analogous diagrams；
Figure 16 is in the embodiment of the present invention while changes back cavity equivalent volume and Q value impedance curve analogous diagrams.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
It is less and less in order to solve in the prior art, to leave for the design space of Microspeaker module, it can not meet
The problem of Microspeaker module design demand, the invention provides a kind of Microspeaker module and its design method, below
With reference to accompanying drawing and embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein
Only to explain the present invention, the present invention is not limited.
The embodiments of the invention provide a kind of Microspeaker module, its exploded pictorial is as shown in figure 1, from top to bottom successively
Including：
Upper casing, vibrational system, middle shell, magnetic circuit system, lower casing；Wherein, vibrational system is arranged on middle shell, vibrational system
It is seamlessly connected with middle shell, and it is by the upper casing that the ante-chamber on the middle shell and back cavity is completely isolated, set in the cavity wall of back cavity
The perforate (exploded view is left front view in figure, fails to show perforate completely) of predetermined shape is equipped with, with what is vibrated in vibrational system
During ensure back cavity can with the external world formed gas exchanges.
The embodiment of the present invention is provided with the perforate of predetermined shape in Microspeaker module in the cavity wall of shell back cavity, by this
Perforate ensures that back cavity can form gas exchanges with the external world, to provide sufficiently large gas exchanges space, in smaller design space
In the case of, the design requirement of Microspeaker module is ensure that, is solved in the prior art, leaves setting for Microspeaker module for
It is less and less to count space, the problem of can not having met Microspeaker module design demand.
During design, the quantity of perforate in back cavity cavity wall, such as two, four or five etc. can be designed according to demand, if
Timing if perforate is excessive, may cause the hardness of back cavity to reduce, if perforate is very little, may lead, it is necessary to pay attention to the number of openings
Cause perforate too big, it is not easy to meet design requirement, therefore, screen cloth can be provided with rear cavity wall perforate, after being stained with screen cloth
The backsight of Microspeaker module perforate as shown in Fig. 2 the section from internal as shown in figure 3, wherein, screen cloth has saturating
Gas and damping and amortization.Fig. 4 shows the schematic diagram being bonded in screen cloth in above-mentioned perforate.
During realization, as shown in figure 5, being provided with gas channel in middle shell bottom corresponding to back cavity, gas channel connects
Perforate at perforate and middle shell, during being vibrated in vibrational system, back cavity is led to by air-flow at the magnetic cylinder of logical vibrational system
Road and perforate carry out gas exchanges with extraneous, and one end of gas channel is arranged in the cavity wall of back cavity, the other end of gas channel
It is arranged on four angles of magnetic circuit system.Fig. 6 shows what the perforate of back cavity flowed outwardly toward with air-flow in gas channel interaction
Schematic diagram, it is drawn when vibrational system is taken exercises, air-flow trend when back cavity moves downward, when back cavity moves upwards,
Those skilled in the art know that air-flow can flow along the opposite direction of arrow in Fig. 6.Before Fig. 7 gives the middle shell of three dimensional form
Chamber schematic diagram, Fig. 8 give the middle shell back cavity schematic diagram of three dimensional form, and those skilled in the art can be seen that to be set in back cavity
Gas channel in, gas channel has perforate (to merely illustrate middle shell structure in Fig. 8, be not shown at four angles of magnetic circuit system
Other parts), air-flow flows along the direction of the arrow in Fig..Fig. 9 gives point of the Microspeaker module complete machine with screen cloth
Schematic diagram is solved, Figure 10 gives the schematic diagram of the Microspeaker module complete machine with screen cloth, ante-chamber sender is shown in figure.
Microspeaker module in the embodiment of the present invention, substantially reduce the volume of loudspeaker in itself, solve due to
The equipment such as mobile phone headspace too small the problem of can not loading Microspeaker module, in the situation of loudspeaker module back cavity very little
Under, in back cavity perforate, gas exchanges are carried out with extraneous by screen cloth, solution loudspeaker module back cavity is too small, and resonant frequency F0 is too high,
The problem of tonequality is bad.
Because current phone is more and more slim, loudspeaker module is difficult to meet Microspeaker back cavity 1mm3Demand.This hair
Bright embodiment additionally provides a kind of design method of Microspeaker module, for designing any of the above-described Microspeaker mould
Group, including following process：Determine the preset audio characteristic of Microspeaker module, wherein, acoustic characteristic comprise at least it is following it
One：Resonant frequency F0, frequency response curve Q values；The number of openings of perforate and the perforate gross area in cavity wall after shell in adjustment, so that miniature
Loudspeaker module meets preset audio characteristic.
When realizing, if being stained with screen cloth in the perforate of back cavity cavity wall, in design, it is also necessary to adjust the percent opening of screen cloth
With the acoustic resistance of screen cloth so that Microspeaker module meets preset audio characteristic.Wherein, acoustic characteristic comprise at least it is following it
One：Resonant frequency F0, frequency response curve Q values.
Loudspeaker module solves current loudspeaker module back cavity size without the method that back cavity (back cavity perforate) designs to be met
The problem of design requirement, and by adjusting screen cloth parameter, reach the mesh for flexibly, dynamically controlling equivalent back cavity size and Q values
's.
The percent opening of screen cloth and the acoustic resistance of screen cloth are adjusted, the number of openings of perforate and the total face of perforate in cavity wall after shell in adjustment
Product, that is, change back cavity equivalent volume and back cavity equiva lent impedance, resonant frequency F0, frequency response curve Q values can be adjusted.With reference to attached
Figure and instantiation come to above-mentioned Microspeaker module and the further explanation of its design method.
(1) Q value design sketch is changed merely.
1st, frequency response curve is as shown in figure 11, is seen at 1KHz, from top to bottom back cavity equiva lent impedance be respectively 5e7,8e7,1/
2e8、3e8。
2nd, impedance curve is as shown in figure 12, is seen at 1KHz, from top to bottom, change back cavity equiva lent impedance be respectively 3e8 Ω,
1e8Ω、1/2e8Ω、8e7Ω、5e7Ω。
(2) back cavity equivalent volume design sketch is changed merely.
1st, frequency response curve is as shown in figure 13, is seen at 500Hz, and from top to bottom, it is respectively 1cm to change back cavity equivalent volume3、
0.8cm3、0.6cm3、0.4cm3、0.2cm3。
2nd, impedance curve is as shown in figure 14, is seen at 500Hz, and from top to bottom, it is respectively 1cm to change back cavity equivalent volume3、
0.8cm3、0.6cm3、0.4cm3、0.2cm3。
(3) while back cavity equivalent volume and Q value design sketch are changed.
1st, frequency response curve is as shown in figure 15, at 800Hz, from top to bottom, while changes back cavity equivalent volume and is respectively
1cm3、0.8cm3、0.6cm3、0.4cm3、0.2cm3, back cavity equiva lent impedance be respectively 3e8 Ω, 1e8 Ω, 1/2e8 Ω, 8e7 Ω,
5e7Ω。
2nd, impedance curve is as shown in figure 16, and at 800Hz, from top to bottom, while back cavity equivalent volume is respectively 1cm3、
0.8cm3、0.6cm3、0.4cm3、0.2cm3, back cavity equiva lent impedance is respectively 3e8 Ω, 1e8 Ω, 1/2e8 Ω, 8e7 Ω, 5e7 Ω.
Those skilled in the art can find out that the cavity low-frequency resonant point of the structural member can reach from a large amount of emulation data
920Hz, sensitivity can reach 91dB, and high-frequency cut-off frequency can reach 4KHz, and medium-high frequency distortion is less than 8%, meets mobile phone
Basic index requirement to loudspeaker cavity.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of Microspeaker module, it is characterised in that include successively from top to bottom：
Upper casing, vibrational system, middle shell, magnetic circuit system, lower casing；
Wherein, the vibrational system is arranged on middle shell, and the vibrational system is seamlessly connected with the middle shell, and by described
Upper casing is completely isolated by the ante-chamber on the middle shell and back cavity, and the perforate of predetermined shape is provided with the cavity wall of the back cavity, with
Ensure that back cavity can form gas exchanges with the external world during the vibrational system is vibrated；
Middle shell bottom corresponding to chamber is provided with gas channel in the rear, and the gas channel connects the magnetic cylinder of the vibrational system
Locate perforate at perforate and middle shell, during being vibrated in the vibrational system, by the back cavity by the gas channel and
The perforate carries out gas exchanges with extraneous.
2. Microspeaker module as claimed in claim 1, it is characterised in that one end of the gas channel is arranged on described
In the cavity wall of back cavity, the other end of the gas channel is arranged on four angles of the magnetic circuit system.
3. the Microspeaker module as any one of claim 1 to 2, it is characterised in that after described in cavity wall perforate
Screen cloth is provided with, wherein, the gas permeability and damping and amortization that the screen cloth has.
4. Microspeaker module as claimed in claim 3, it is characterised in that the quantity of the perforate be four or four with
On.
5. a kind of design method of Microspeaker module, miniature raised one's voice for design any one of Claims 1-4
Device module, it is characterised in that including：
The preset audio characteristic of Microspeaker module is determined, wherein, the acoustic characteristic comprises at least one below：Resonance frequency
Rate F0, frequency response curve Q values；
The number of openings of perforate and the perforate gross area in cavity wall after shell in adjustment, so that described in the Microspeaker module meets
Preset audio characteristic.
6. design method as claimed in claim 5, it is characterised in that also include：
In the case of being provided with screen cloth in the perforate, the percent opening of the screen cloth and the acoustic resistance of screen cloth are adjusted, so that described
Microspeaker module meets the preset audio characteristic.
7. the design method as described in claim 5 or 6, it is characterised in that the acoustic characteristic comprises at least one below：It is humorous
Vibration frequency F0, frequency response curve Q values.
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| CN201410849782.6A CN104602168B (en) | 2014-12-31 | 2014-12-31 | A kind of Microspeaker module and its design method |
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| CN201410849782.6A CN104602168B (en) | 2014-12-31 | 2014-12-31 | A kind of Microspeaker module and its design method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819315B (en) * | 2015-05-11 | 2017-07-04 | 歌尔股份有限公司 | A kind of air valve and loudspeaker |
| CN105188003B (en) * | 2015-09-30 | 2018-09-11 | 歌尔股份有限公司 | A kind of loud speaker module |
| EP3509321A4 (en) * | 2016-09-02 | 2020-05-06 | Tokyo Onkyo Co., Ltd. | Electroacoustic transducer device |
| CN107371115A (en) * | 2017-07-18 | 2017-11-21 | Tcl移动通信科技（宁波）有限公司 | A kind of detection method, storage medium and the terminal of complete machine loudspeaker performance |
| US11330363B2 (en) | 2018-06-29 | 2022-05-10 | Huawei Technologies Co., Ltd. | Speaker and mobile terminal |
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| KR101573517B1 (en) * | 2009-10-12 | 2015-12-02 | 삼성전자주식회사 | Piezoelectric micro speaker |
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| CN1842222A (en) * | 2005-04-01 | 2006-10-04 | 创新科技有限公司 | Multimedia speaker product |
| CN103118320A (en) * | 2013-01-18 | 2013-05-22 | 歌尔声学股份有限公司 | Ultrathin loudspeaker module |
| CN103108269A (en) * | 2013-02-07 | 2013-05-15 | 歌尔声学股份有限公司 | Speaker module and electronic device using the same |
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Effective date of registration: 20210910 Address after: 518052 a605, building G4, TCL International e city, Shuguang community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen yingmu Technology Co.,Ltd. Address before: 518057 South Mountain High-tech Industrial Park North District, Shenzhen City, Guangdong Province, 1 Kupai Information Port, 6 floors Patentee before: YULONG COMPUTER TELECOMMUNICATION SCIENTIFIC (SHENZHEN) Co.,Ltd. |