CN108462929B - Speaker module and electronic equipment - Google Patents

Speaker module and electronic equipment Download PDF

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Publication number
CN108462929B
CN108462929B CN201810471605.7A CN201810471605A CN108462929B CN 108462929 B CN108462929 B CN 108462929B CN 201810471605 A CN201810471605 A CN 201810471605A CN 108462929 B CN108462929 B CN 108462929B
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China
Prior art keywords
cavity
resonant
cavities
resonant cavity
shell
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CN201810471605.7A
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Chinese (zh)
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CN108462929A (en
Inventor
毛林进
范双双
董文强
张凡
李晓龙
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Goertek Inc
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Goertek Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/11Aspects regarding the frame of loudspeaker transducers

Abstract

The invention discloses a loudspeaker module and electronic equipment, the module comprises a module shell and a loudspeaker monomer, wherein an accommodating cavity and a plurality of resonant cavities are arranged in the module shell, the loudspeaker monomer is arranged in the accommodating cavity and divides the accommodating cavity into a front sound cavity and a rear sound cavity, and the front sound cavity is communicated with the external space through a sound outlet; at least two resonant cavities of the plurality of resonant cavities are communicated in series and at least two resonant cavities are arranged in parallel, one of the series-communicated resonant cavities is communicated with the front sound cavity, and the parallel-arranged resonant cavities are isolated from each other and are respectively communicated with the front sound cavity. The invention can improve the sound production effect of the loudspeaker module by arranging the resonant cavities which are arranged in series and in parallel.

Description

Speaker module and electronic equipment
Technical Field
The invention relates to the technical field of electroacoustic products. And more particularly, to a speaker module and an electronic device.
Background
A loudspeaker is an important acoustic component in electronic equipment, which is a transducer device that converts an electrical signal into an acoustic signal. The existing loudspeaker module comprises a shell and a sounder monomer arranged in the shell, wherein the sounder monomer divides a containing cavity in the shell into a front sound cavity and a rear sound cavity. The front sound cavity has little influence on the low frequency band of music sound, and mainly influences the high frequency band part.
In the conventional speaker module, especially for the module having the side sound outlet, since the sound outlet channel of the front sound cavity is long, high-frequency resonance is easily caused, so as to affect the acoustic performance of the speaker module. The resonant cavity communicates with the front acoustic cavity, which provides a significant improvement in the FR (frequency response) of the speaker module.
However, the conventional resonant cavity is a single cavity and limited by the unity of the natural frequency, the resonant cavity has a limited frequency adjustment width, and cannot effectively adjust the position of the multi-peak valley of the frequency response curve, so that the frequency response curve is not smooth.
Disclosure of Invention
The invention aims to provide a novel technical scheme of a loudspeaker module.
According to a first aspect of the present invention, there is provided a speaker module, comprising a module case in which an accommodation chamber and a plurality of resonance chambers are provided, and a speaker unit disposed in the accommodation chamber and dividing the accommodation chamber into a front sound chamber and a rear sound chamber, the front sound chamber communicating with an external space through a sound outlet;
at least two resonant cavities of the plurality of resonant cavities are communicated in series and at least two resonant cavities are arranged in parallel, one of the series-communicated resonant cavities is communicated with the front sound cavity, and the parallel-arranged resonant cavities are isolated from each other and are respectively communicated with the front sound cavity.
Preferably, at least one of the resonant cavities is embedded in another resonant cavity.
Preferably, the resonant cavity embedded in the other resonant cavity can be provided with multiple layers of nesting.
Preferably, the plurality of resonant cavities include a first resonant cavity and a second resonant cavity, the first resonant cavity and the second resonant cavity are disposed adjacent to each other, a first communication channel is disposed between the first resonant cavity and the second resonant cavity, and a second communication channel is disposed between the front sound cavity and any one of the first resonant cavity and the second resonant cavity.
Preferably, the plurality of resonant cavities further includes a third resonant cavity, the third resonant cavity is isolated from the first resonant cavity and the second resonant cavity, and a third communication channel is provided between the third resonant cavity and the front acoustic cavity.
Preferably, the plurality of resonant cavities further includes a fourth resonant cavity embedded in the third resonant cavity.
Preferably, the module housing comprises an upper shell, a middle shell and a lower shell, wherein the middle shell comprises a side wall, a cavity hollow area enclosed by the side wall and a plurality of resonant cavity hollow areas;
the upper shell and the lower shell are respectively covered at the upper ends and the lower ends of the accommodating cavity hollow areas and the resonant cavity hollow areas so as to enclose the accommodating cavity and the resonant cavities.
Preferably, the resonant cavity is an independently provided cavity.
Preferably, the resonant cavity is a small cavity separated by a large cavity through a partition.
According to another aspect of the present invention, an electronic device is provided. The electronic equipment comprises the loudspeaker module provided by the invention.
The invention has the following beneficial effects:
the module shell of the loudspeaker module is provided with a plurality of resonant cavities, wherein at least two resonant cavities are communicated in series and at least two resonant cavities are arranged in parallel. Therefore, a coupled resonant system is formed, the resonant system can provide a broadband noise resonant frequency band and absorb noise in a wider frequency band, the range of the resonant frequency band can be adjusted by adjusting the volumes and shapes of a plurality of resonant cavities, the controllable frequency band range of the resonant cavities is enlarged, or a plurality of resonant peaks are close to each other by adjusting the volumes and shapes of the resonant cavities, so that the transmission loss on the set frequency band can be superposed, and the noise absorption effect of the loudspeaker module on the set frequency band is enhanced.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows an exploded schematic view of a speaker module according to an embodiment of the present invention.
Fig. 2 shows a cross-sectional view of a speaker module of one embodiment of the present invention.
Fig. 3 shows a schematic structural view of a module case without a lower case according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Fig. 1 is an exploded view of a speaker module according to an embodiment of the present invention, fig. 2 is a structural schematic view of a module case without a lower cover and a rear cover according to an embodiment of the present invention, and fig. 3 is a sectional view of a speaker module according to an embodiment of the present invention.
As shown in fig. 1-3, the speaker module includes a module housing and a speaker unit. An accommodating cavity and a plurality of resonant cavities are arranged in the module shell, and the loudspeaker unit is arranged in the accommodating cavity. The speaker monomer will hold the chamber and separate into preceding sound chamber 10 and back sound chamber, and preceding sound chamber 10 communicates with the exterior space through the sound outlet.
At least two resonant cavities of the plurality of resonant cavities are communicated in series and at least two resonant cavities are arranged in parallel. One of the series-connected resonant cavities is communicated with the front acoustic cavity 10, and the parallel-connected resonant cavities are isolated from each other and are respectively communicated with the front acoustic cavity 10. In the embodiments of the present invention, at least one resonant cavity embedded in another resonant cavity is further reserved in the plurality of resonant cavities, and the embedded resonant cavity may further be embedded in another resonant cavity, that is, the resonant cavities may be configured as a multi-layer embedded structure.
The loudspeaker single body can be a moving iron type loudspeaker single body or a moving coil type loudspeaker single body. These two monomers are common knowledge in the art and will not be described in detail here.
The resonant cavity is a closed cavity. The resonant cavities are connected in series, that is, a plurality of resonant cavities are sequentially connected one by one, and a first communication channel 23 is formed between the resonant cavities, and one resonant cavity is communicated with the front acoustic cavity 10 through a second communication channel 24. The plurality of resonant cavities are arranged in parallel, which means that the plurality of resonant cavities are isolated from each other and are not communicated with each other, and each resonant cavity is communicated with the front sound cavity 10. The nested resonance chambers are only in communication with the resonance chambers outside thereof.
The resonant cavity may be a separately provided closed cavity. Or a small cavity separated by a large cavity through a partition, so that the manufacture of the resonant cavity becomes simple and the structure of the module shell is compact.
The shape of the resonant cavity can be, but not limited to, a cuboid, a sphere, a cone, etc., and can also be a cavity with an irregular structure designed by those skilled in the art according to the shape of the reserved space of the device to be installed.
In the embodiment of the present invention, a plurality of resonant cavities are disposed in the module housing. At least two resonant cavities of the plurality of resonant cavities are in series communication, and one of the resonant cavities is in communication with the front acoustic cavity 10. When the speaker unit 21 generates sound, the incident sound pressure pushes the air in the first communication channel 23 to move, and compresses the gas in the innermost resonant cavity, and at the same time, the gas pressure in the resonant cavity is increased, thus forming a coupled resonant system. The resonant cavities are connected in series, so that a broadband noise resonant frequency band can be provided, and noises in a wider frequency band can be absorbed. Through this kind of mode, the sound production effect of speaker module can be improved to a plurality of resonant cavities of series connection intercommunication. The plurality of resonant cavities of this embodiment further includes at least two resonant cavities arranged in parallel, and the resonant cavities arranged in parallel can generate resonant peaks at a plurality of resonant frequencies. The controllable frequency band range of the resonant cavities can be expanded by adjusting the volumes and the shapes of the resonant cavities to adjust the range of the resonant frequency band; or, the volumes and the shapes of the resonant cavities are adjusted to enable the resonant peaks to be close to each other, so that the transmission loss on the set frequency band can be superposed, and the effect of the loudspeaker module on absorbing noise in the set frequency band can be enhanced. The plurality of resonant cavities of the present embodiment further includes at least one resonant cavity embedded in another outer resonant cavity, and the outer resonant cavities may be resonant cavities connected in series or resonant cavities arranged in parallel, which can be selected by those skilled in the art according to requirements. The resonant cavity nested inside is communicated with the resonant cavity outside, the nested resonant cavity can not only achieve the effect of series or parallel resonant cavities, but also reduce the volume of the loudspeaker module due to the nested arrangement, and the loudspeaker module adapts to the trend of miniaturization of electronic equipment.
In one embodiment, as shown in fig. 1-3, the module case includes an upper case 11, a middle case 12, and a lower case 13. The middle shell 12 includes a sidewall and a hollow-out area of the containing cavity and a plurality of hollow-out areas of the resonant cavity enclosed by the sidewall. The upper shell 11 and the lower shell 13 cover the upper end and the lower end of the accommodating cavity hollow area and the resonant cavity hollow area respectively to form an accommodating cavity and a plurality of resonant cavities in a surrounding manner.
The side wall is provided with a communication channel for communicating the resonant cavity with the front sound cavity and between the resonant cavity and the resonant cavity.
Note that the up and down directions are parallel to the vibration direction of the diaphragm of the speaker unit 21. The speaker unit divides the accommodation chamber into a front sound chamber 10 and a rear sound chamber.
For example, the upper case 11 and the lower case 13 each have a flat structure. The lower case 13 is made of a metal material to reduce the thickness of the module case. The metal material has good heat dissipation performance. A magnetic conductive plate 22 is embedded on the lower shell 13. The speaker unit 21 is fixed to the magnetic conductive plate 24, wherein the magnetic circuit system of the speaker unit 21 is close to the magnetic conductive plate 22.
In this way, the manufacture of the module housing becomes easy. For example, the upper shell 11 and the middle shell 12 are made of TPU material by injection molding. The lower case 13 is made of a metal plate by press molding.
In addition, the middle shell 12 is a hollow structure. When the integral injection molding is carried out, the mold does not need to adopt a slide block, so that the injection molding difficulty of the middle shell 12 is reduced.
In addition, the installation of the speaker unit 21 becomes easy. For example, the speaker unit 21 is directly mounted in the hollow-out area of the accommodation chamber. The diaphragm of the speaker unit 21 is opposed to the upper case 11. The space between the diaphragm and the upper shell 11 is at least a part of the front acoustic cavity 10. The magnetic circuit system of the speaker unit 21 is fixed on the magnetic conductive plate 22 by bonding.
Optionally, the upper shell 11 and the middle shell 12 are joined together by ultrasonic welding. The ultrasonic welding has the characteristics of high welding speed and firm connection. For example, the upper shell 11 and the middle shell 12 are TPU materials. The upper shell 11 is welded to the upper end of the middle shell 12 using ultrasonic welding.
Optionally, the rear acoustic chamber is located at the side of the front acoustic chamber 10. This can reduce the height of the module case. It will be understood by those skilled in the art that the side portion refers to the side portion along the extension plane of the front acoustic chamber.
In one embodiment of the present invention as shown in fig. 1 and 3, the plurality of resonant cavities of the speaker module includes a first resonant cavity 14, a second resonant cavity 15, a third resonant cavity 16 and a fourth resonant cavity 17. The first resonant cavity 14 and the second resonant cavity 15 are disposed adjacently, a first communication channel 23 is disposed between the first resonant cavity 14 and the second resonant cavity 15, and the first resonant cavity 14 is communicated with the front acoustic cavity 10 through a second communication channel 24, that is, the first resonant cavity 14 is communicated with the second resonant cavity 15 in series. The third resonant cavity 16 is isolated from the first resonant cavity 14 and the second resonant cavity 15, and is communicated with the front acoustic cavity 10 through a third communication channel 25, that is, the third resonant cavity 16 is arranged in parallel with the first resonant cavity 14 and the second resonant cavity 15. The fourth resonant cavity 17 is embedded in the third resonant cavity 16, and the fourth resonant cavity 17 is communicated with the inside of the third resonant cavity 16.
When the speaker module is in operation, the sound pressure incident on the speaker unit 21 pushes the air in the second communicating channel 24 to move and compress the gas in the first resonant cavity 14, and at the same time, the air pressure in the second resonant cavity 15 is increased through the first communicating channel 23. At the same time, the sound pressure incident on the speaker unit 21 pushes the air in the third communication passage 25 to move and compress the gas in the third resonant cavity 16, and at the same time, the air pressure in the fourth resonant cavity 17 is increased. This forms a coupled resonant system, with a single resonant cavity forming only one resonant peak, and four resonant cavities forming resonant peaks at four frequencies. The resonance system of the invention not only can provide a broadband noise resonance frequency band and can absorb noise in a wider frequency band, but also can adjust the range of the resonance frequency band by adjusting the volumes and the shapes of the first resonance cavity 14, the second resonance cavity 15, the third resonance cavity 16 and the fourth resonance cavity 17, so that the controllable frequency band range of the four resonance cavities can be enlarged; or, the volumes and shapes of the first resonant cavity 14, the second resonant cavity 15, the third resonant cavity 16 and the fourth resonant cavity 17 are adjusted to make the four resonant peaks close to each other, so that the transmission loss on the set frequency band is superimposed, and the effect of the speaker module on absorbing noise in the set frequency band is enhanced. In addition, since the fourth resonant cavity 17 is embedded inside the third resonant cavity 16, the volume of the speaker module can be effectively reduced, and the development trend of light weight, thinness and miniaturization of electronic devices is complied with.
The number of the resonance peaks corresponds to the number of the resonance cavities, and the number of the resonance cavities can be set according to the frequency width range of the noise so as to absorb the noise in a wider frequency band; or to superimpose the transmission losses over a set frequency band.
According to another embodiment of the present invention, an electronic device is provided. The electronic device may be, but is not limited to, a cell phone, a tablet computer, a smart watch, a game console, a laptop computer, an intercom, an earphone, and the like. The electronic equipment comprises the loudspeaker module provided by the invention. The electronic equipment has the characteristics of small noise and good sound effect.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims (8)

1. A loudspeaker module is characterized by comprising a module shell and a loudspeaker single body, wherein an accommodating cavity and a plurality of resonant cavities are arranged in the module shell, the loudspeaker single body is arranged in the accommodating cavity and divides the accommodating cavity into a front sound cavity and a rear sound cavity, and the front sound cavity is communicated with an external space through a sound outlet;
at least two resonant cavities of the plurality of resonant cavities are communicated in series, at least two resonant cavities are arranged in parallel, at least one resonant cavity is embedded in the other resonant cavity, the resonant cavities embedded in the other resonant cavity are nested in a multilayer manner, one of the resonant cavities communicated in series is communicated with the front sound cavity, the resonant cavities arranged in parallel are isolated from each other and are respectively communicated with the front sound cavity, and the resonant cavities are cuboid, spherical, conical or irregularly-structured.
2. The speaker module as claimed in claim 1, wherein the plurality of resonant cavities includes a first resonant cavity and a second resonant cavity, the first resonant cavity and the second resonant cavity are disposed adjacent to each other, a first communication channel is disposed between the first resonant cavity and the second resonant cavity, and a second communication channel is disposed between any one of the first resonant cavity and the second resonant cavity and the front sound cavity.
3. The speaker module as claimed in claim 2, wherein the plurality of resonant cavities further includes a third resonant cavity, the third resonant cavity is isolated from the first and second resonant cavities, and a third communication channel is disposed between the third resonant cavity and the front acoustic cavity.
4. The speaker module as claimed in claim 3, wherein the plurality of resonant cavities further comprises a fourth resonant cavity embedded in the third resonant cavity.
5. The speaker module of claim 1, wherein the module housing comprises an upper shell, a middle shell, and a lower shell, the middle shell comprising sidewalls and a receiving cavity hollowed-out area and a plurality of resonant cavity hollowed-out areas enclosed by the sidewalls;
the upper shell and the lower shell are respectively covered at the upper ends and the lower ends of the accommodating cavity hollow areas and the resonant cavity hollow areas so as to enclose the accommodating cavity and the resonant cavities.
6. The speaker module as claimed in claim 1, wherein the resonant cavity is a separate cavity.
7. The speaker module as claimed in claim 1, wherein the resonant cavity is a small cavity separated by a large cavity and a partition.
8. An electronic device comprising a speaker module according to any one of claims 1-7.
CN201810471605.7A 2018-05-17 2018-05-17 Speaker module and electronic equipment Active CN108462929B (en)

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CN201810471605.7A CN108462929B (en) 2018-05-17 2018-05-17 Speaker module and electronic equipment
PCT/CN2018/122026 WO2019218667A1 (en) 2018-05-17 2018-12-19 Loudspeaker module and electronic device

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CN108462929A CN108462929A (en) 2018-08-28
CN108462929B true CN108462929B (en) 2020-10-20

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108462929B (en) * 2018-05-17 2020-10-20 歌尔股份有限公司 Speaker module and electronic equipment
CN209462592U (en) * 2018-12-17 2019-10-01 歌尔科技有限公司 Acoustic apparatus and electronic equipment
WO2020125619A1 (en) * 2018-12-17 2020-06-25 歌尔股份有限公司 Acoustic device and electronic apparatus
CN109874067A (en) * 2018-12-30 2019-06-11 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN109936791B (en) * 2019-02-15 2021-07-27 安克创新科技股份有限公司 Earphone set
CN209949410U (en) * 2019-06-27 2020-01-14 歌尔科技有限公司 Acoustic device and electronic apparatus

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CN103391499A (en) * 2013-07-24 2013-11-13 歌尔声学股份有限公司 Loudspeaker module and manufacturing method thereof
CN107318073A (en) * 2017-07-28 2017-11-03 歌尔股份有限公司 Loudspeaker module and electronic equipment
CN107371106A (en) * 2017-07-04 2017-11-21 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN107371107A (en) * 2017-07-28 2017-11-21 歌尔股份有限公司 Loudspeaker module and electronic equipment

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KR20170021562A (en) * 2015-08-18 2017-02-28 삼성전자주식회사 Loudspeaker
CN108462929B (en) * 2018-05-17 2020-10-20 歌尔股份有限公司 Speaker module and electronic equipment
CN208112944U (en) * 2018-05-17 2018-11-16 歌尔股份有限公司 Loudspeaker mould group and electronic equipment

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
CN103391499A (en) * 2013-07-24 2013-11-13 歌尔声学股份有限公司 Loudspeaker module and manufacturing method thereof
CN107371106A (en) * 2017-07-04 2017-11-21 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN107318073A (en) * 2017-07-28 2017-11-03 歌尔股份有限公司 Loudspeaker module and electronic equipment
CN107371107A (en) * 2017-07-28 2017-11-21 歌尔股份有限公司 Loudspeaker module and electronic equipment

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CN108462929A (en) 2018-08-28

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