CN107690106B - Loudspeaker box - Google Patents

Loudspeaker box Download PDF

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Publication number
CN107690106B
CN107690106B CN201710536963.7A CN201710536963A CN107690106B CN 107690106 B CN107690106 B CN 107690106B CN 201710536963 A CN201710536963 A CN 201710536963A CN 107690106 B CN107690106 B CN 107690106B
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CN
China
Prior art keywords
loudspeaker
casing
cover plate
loudspeaker box
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710536963.7A
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Chinese (zh)
Other versions
CN107690106A (en
Inventor
秦鹏
施胜荣
张哲�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AAC Technologies Pte Ltd filed Critical AAC Technologies Pte Ltd
Priority to CN201710536963.7A priority Critical patent/CN107690106B/en
Publication of CN107690106A publication Critical patent/CN107690106A/en
Application granted granted Critical
Publication of CN107690106B publication Critical patent/CN107690106B/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/02Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/021Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2884Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers

Abstract

The invention discloses a loudspeaker box, which comprises a shell and a loudspeaker single body accommodated in the shell, wherein the loudspeaker single body comprises a vibrating diaphragm for vibrating and sounding, the vibrating diaphragm and the shell are arranged at intervals to form a front sound cavity, the loudspeaker box also comprises a sound guide channel for communicating the front sound cavity with the outside, the front sound cavity and the sound guide channel jointly form the front cavity of the loudspeaker box, a through hole penetrating through the shell is arranged on the shell at a position corresponding to the front cavity, the loudspeaker box also comprises an elastic cover plate which is connected with the shell and covers the through hole and is used for absorbing the energy of the vibration under the specific resonant frequency, and the elastic cover plate comprises a metal sheet and an elastic material layer which is stacked on the metal sheet. The loudspeaker box provided by the invention can weaken the resonance of the front cavity, reduce the resonance peak and improve the distortion.

Description

Loudspeaker box
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of electroacoustic conversion, in particular to a loudspeaker box.
[ background of the invention ]
With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.
The loudspeaker box includes the casing, accept in speaker monomer in the casing, speaker monomer is including the vibrating diaphragm that is used for the vibration sound production, the vibrating diaphragm with the casing interval sets up the preceding acoustic cavity of formation, preceding acoustic cavity forms the front chamber with leading the sound passageway intercommunication. In the related art, the housing is made of a hard plastic material and a metal material, and the area corresponding to the front acoustic cavity is a rigid wall. The rigid wall has low damping, small vibration amplitude and limited radiation energy, and can not effectively transmit the energy of the cavity, thereby being incapable of absorbing the energy of certain specified frequencies. The front cavity resonance is generated when the loudspeaker box produces sound, and due to the resonance effect, a resonance peak is formed at medium and high frequency, and meanwhile, 2-time and 3-time distortion peaks can be generated on distortion to influence the listening feeling.
Therefore, there is a need to provide a new speaker box to solve the above technical problems.
[ summary of the invention ]
The invention aims to overcome the technical problems and provide a loudspeaker box which weakens front cavity resonance, reduces resonance peak and improves distortion.
The technical scheme of the invention is as follows: the utility model provides a loudspeaker box, include the casing and accept in loudspeaker monomer in the casing, loudspeaker monomer is including the vibrating diaphragm that is used for vibrating the sound production, the vibrating diaphragm with the casing interval sets up the preceding sound chamber of formation, loudspeaker box still includes the intercommunication preceding sound chamber and external sound channel of leading, preceding sound chamber with the sound channel of leading constitutes jointly loudspeaker box's antechamber, correspond on the casing the position in antechamber is equipped with the through-hole that runs through the casing, loudspeaker box still include with the casing is connected and is covered the elastic cover plate that is used for absorbing the energy of the vibration under the specific resonant frequency of through-hole, elastic cover plate includes sheetmetal and range upon range of locating the elastic material layer of sheetmetal.
Preferably, the through hole is arranged opposite to the loudspeaker monomer.
Preferably, the elastic material layer is formed on the metal sheet by a spraying process.
Preferably, the elastic material layer is adhesively fixed to the metal sheet.
Preferably, the elastic material layer is one of thermoplastic polyurethane elastomer, methyl cyclopentenolone or silica gel.
Preferably, the elastic cover plate absorbs the energy of vibration with the resonant frequency of 3000-7000 Hz.
Compared with the related art, the loudspeaker box provided by the invention has the beneficial effects that: the loudspeaker box comprises a shell, a front cavity area and an elastic cover plate, wherein the shell comprises a through hole formed corresponding to the front cavity area, the elastic cover plate is connected with the shell and covers the through hole, and the elastic cover plate is used for absorbing energy of vibration under specific resonant frequency, so that the resonant effect of the loudspeaker box is weakened, the distortion of the loudspeaker box is reduced, and the acoustic performance of the loudspeaker box is improved.
[ description of the drawings ]
Fig. 1 is a perspective view of a speaker box provided by the present invention;
FIG. 2 is an exploded view of the loudspeaker enclosure of FIG. 1;
FIG. 3 is a cross-sectional view of the loudspeaker enclosure of FIG. 1 taken along line A-A;
FIG. 4 shows the results of the amplitude test of the elastic cover plate in the speaker box according to the present invention;
FIG. 5 is a graph of the resonance peak to contrast ratio of the speaker box of the present invention and a speaker box corresponding to a rigid wall used in the related art;
fig. 6 is a graph showing distortion spike contrast of the speaker box according to the present invention and the speaker box using the rigid wall according to the related art.
[ detailed description ] embodiments
The invention will be further explained with reference to the drawings and the embodiments.
Please refer to fig. 1, fig. 2 and fig. 3 in combination, wherein fig. 1 is a perspective view of a speaker box provided by the present invention; FIG. 2 is an exploded view of the loudspeaker enclosure of FIG. 1; fig. 3 is a cross-sectional view of the loudspeaker enclosure of fig. 1 taken along line a-a. The speaker box 100 includes a housing 11 and a speaker unit 12 housed in the housing 11. The speaker unit 12 includes a diaphragm 121 for vibrating sound.
The housing 11 includes an upper cover 111 and a lower cover 112, the upper cover 111 and the lower cover 112 enclose to form an accommodating space, and the speaker unit 12 is accommodated in the accommodating space.
The diaphragm 121 and the inner wall of the upper cover 111 are arranged at an interval to form a front acoustic cavity 113, the upper cover 111 further includes a sound guide channel 114 communicating the front acoustic cavity 113 with the outside, the front acoustic cavity 113 and the sound guide channel 114 together form a front cavity 110 of the speaker box 100, and the front cavity 110 conducts sound generated by the diaphragm 121 to the outside of the housing 11.
A through hole 1111 penetrating through the upper cover 111 is formed in the upper cover 111 corresponding to the front cavity 110, a groove 1112 is further formed in the through hole 1111 of the upper cover 111, the speaker box 100 further comprises an elastic cover plate 13 connected with the upper cover 111 and covering the through hole 1111, the elastic cover plate 13 is fixedly connected with the upper cover 111 to seal the through hole 1111, the elastic cover plate 13 comprises a metal sheet 131 and an elastic material layer 132 laminated on the metal sheet 131, and the elastic cover plate 13 is accommodated in the groove 1112 and arranged flush with the outer surface of the upper cover 111. Preferably, the through hole 1111 is disposed opposite to the speaker unit 12, and of course, the through hole 1111 may also be disposed at the position of the sound guide channel 114.
The elastic cover plate 13 in the present invention replaces the rigid wall in the related art, and the elastic material layer 132 of the elastic cover plate 13 can increase damping and reduce the overall young's modulus, the elastic cover plate 13 has a resonant frequency, and by design, when the resonant frequency of the elastic cover plate 13 is adjusted to a certain frequency, the elastic cover plate 13 will generate strong vibration near the resonant frequency, when the speaker box 100 sounds, and the speaker unit 12 vibrates, the air in the front cavity 110 is compressed to generate energy, which drives the elastic cover plate 13 to vibrate, thereby consuming the energy in the front cavity 110, and the elastic cover plate 13 preferably vibrates at the resonant frequency, at this time, the vibration strength reaches the maximum, thereby consuming more energy; thereby achieving the purpose of absorbing energy near the designated frequency; in addition, the elastic cover plate 13 replaces a rigid wall to transmit the dense medium in the front cavity 110 to the outside of the front cavity 110, thereby reducing the resonance phenomenon of the speaker box 100 and improving the distortion.
The above object is achieved by designing the material, area, shape and thickness of the elastic cover plate 13 in whole or in part. The elastic material layer 132 is preferably one of thermoplastic polyurethane elastomer (TPU), Methyl Cyclopentenolone (MCP) or silicone, and the elastic material layer 132 is formed on the metal sheet 131 through a spray coating process or is adhesively fixed to the metal sheet 131. The elastic cover plate 13 and the upper cover 111 form a partial structure fixedly connected to form a front cavity 110, so as to absorb energy near a resonance peak of the front cavity 110 of the speaker box 100, thereby achieving the purposes of reducing the resonance peak, improving distortion and improving the acoustic performance of the speaker box 100. The elastic cover 13 can be designed and adjusted according to the resonant frequency range to be absorbed. The specific resonant frequency is the set resonant frequency range to be absorbed.
The speaker box 100 provided by the present invention was subjected to an elastic cover amplitude test. Referring to fig. 4, the result of the amplitude test of the elastic cover in the speaker box according to the present invention is shown, wherein curve a represents the maximum amplitude of the elastic cover, and curve b represents the minimum amplitude of the elastic cover. As can be seen from FIG. 4, in this embodiment, the resonant frequency of the elastic cover is 3000-7000Hz, and a strong vibration is generated around the resonant frequency of the elastic cover.
The loudspeaker box provided by the invention is compared with the loudspeaker box corresponding to the rigid wall adopted in the related technology for performance test, and the performance data such as the resonance peak, the distortion peak and the like of the loudspeaker box are detected. Referring to fig. 5 and 6, fig. 5 is a graph illustrating a resonance peak contrast ratio of the speaker box according to the present invention and a speaker box corresponding to a rigid wall used in the related art; fig. 6 is a graph showing distortion spike contrast of the speaker box according to the present invention and the speaker box using the rigid wall according to the related art. Fig. 5 shows a curve c representing a resonance peak curve of a speaker box corresponding to a rigid wall in the related art, and a curve d representing a resonance peak curve of a speaker box according to the present invention; fig. 6 shows a distortion peak curve of a loudspeaker enclosure corresponding to a rigid wall in the related art, and shows a distortion peak curve of a loudspeaker enclosure provided by the present invention.
As can be seen from the data of fig. 5 and 6, the resonance peak of the speaker box using the elastic cover plate is significantly reduced compared to the speaker box using the rigid wall in the related art; and distortion spikes are also significantly reduced.
Compared with the related art, the loudspeaker box provided by the invention has the beneficial effects that: the loudspeaker box comprises a shell, a front cavity area and an elastic cover plate, wherein the shell comprises a through hole formed corresponding to the front cavity area, the elastic cover plate is connected with the shell and covers the through hole, and the elastic cover plate is used for absorbing energy of vibration under specific resonant frequency, so that the resonant effect of the loudspeaker box is weakened, the distortion of the loudspeaker box is reduced, and the acoustic performance of the loudspeaker box is improved.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims (6)

1. The utility model provides a loudspeaker box, include the casing and accept in loudspeaker monomer in the casing, loudspeaker monomer is including the vibrating diaphragm that is used for the vibration sound production, the vibrating diaphragm with the casing interval sets up the preceding sound chamber of formation, loudspeaker box still includes the intercommunication preceding sound chamber and external sound channel of leading, preceding sound chamber with the sound channel of leading constitutes jointly loudspeaker box's antechamber, a serial communication port, correspond on the casing the position of antechamber is equipped with the through-hole that runs through the casing, loudspeaker box still include with the casing is connected and is covered the elastic cover plate of through-hole, elastic cover plate includes sheetmetal and range upon range of locating the elastic material layer of sheetmetal, elastic cover plate produces the vibration absorption the energy of the vibration under the specific resonant frequency of antechamber.
2. The speaker cabinet as claimed in claim 1, wherein the through-hole is disposed opposite to the speaker unit.
3. A loudspeaker enclosure according to claim 1, wherein the layer of resilient material is formed from the sheet metal by a spray process.
4. A loudspeaker enclosure according to claim 1, wherein the layer of resilient material is adhesively secured to the sheet metal.
5. The loudspeaker enclosure of claim 1, wherein the layer of elastomeric material is one of a thermoplastic polyurethane elastomer, methyl cyclopentenolone, or silicone.
6. A loudspeaker enclosure according to any one of claims 1 to 5, wherein the resilient cover absorbs energy from vibrations having a resonant frequency of 3000 to 7000 Hz.
CN201710536963.7A 2017-07-04 2017-07-04 Loudspeaker box Active CN107690106B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710536963.7A CN107690106B (en) 2017-07-04 2017-07-04 Loudspeaker box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710536963.7A CN107690106B (en) 2017-07-04 2017-07-04 Loudspeaker box

Publications (2)

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CN107690106A CN107690106A (en) 2018-02-13
CN107690106B true CN107690106B (en) 2020-02-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108712693B (en) * 2018-03-26 2020-12-04 Oppo广东移动通信有限公司 Shell assembly and electronic equipment with same
WO2020258150A1 (en) * 2019-06-27 2020-12-30 瑞声声学科技(深圳)有限公司 Electronic device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203590383U (en) * 2013-09-12 2014-05-07 歌尔声学股份有限公司 Loudspeaker module
CN204231652U (en) * 2014-12-15 2015-03-25 歌尔声学股份有限公司 A kind of loud speaker module
CN204350291U (en) * 2015-02-03 2015-05-20 歌尔声学股份有限公司 Loud speaker module
CN204733358U (en) * 2015-07-01 2015-10-28 歌尔声学股份有限公司 Microspeaker
CN205195972U (en) * 2015-10-21 2016-04-27 歌尔声学股份有限公司 Loudspeaker module group
CN205847524U (en) * 2016-07-20 2016-12-28 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN206061094U (en) * 2016-07-20 2017-03-29 瑞声科技(新加坡)有限公司 Loudspeaker enclosure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517721A (en) * 2013-08-29 2015-03-04 Nokia Corp Speaker apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203590383U (en) * 2013-09-12 2014-05-07 歌尔声学股份有限公司 Loudspeaker module
CN204231652U (en) * 2014-12-15 2015-03-25 歌尔声学股份有限公司 A kind of loud speaker module
CN204350291U (en) * 2015-02-03 2015-05-20 歌尔声学股份有限公司 Loud speaker module
CN204733358U (en) * 2015-07-01 2015-10-28 歌尔声学股份有限公司 Microspeaker
CN205195972U (en) * 2015-10-21 2016-04-27 歌尔声学股份有限公司 Loudspeaker module group
CN205847524U (en) * 2016-07-20 2016-12-28 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN206061094U (en) * 2016-07-20 2017-03-29 瑞声科技(新加坡)有限公司 Loudspeaker enclosure

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