CN113676581B - Sound producing device and electronic equipment - Google Patents
Sound producing device and electronic equipment Download PDFInfo
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- CN113676581B CN113676581B CN202110940540.8A CN202110940540A CN113676581B CN 113676581 B CN113676581 B CN 113676581B CN 202110940540 A CN202110940540 A CN 202110940540A CN 113676581 B CN113676581 B CN 113676581B
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- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000035945 sensitivity Effects 0.000 description 13
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 101100344402 Magnetospirillum magneticum (strain AMB-1 / ATCC 700264) mamD gene Proteins 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 101150099381 mms5 gene Proteins 0.000 description 1
- 101150044311 mms6 gene Proteins 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
- H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The application discloses a sounding device and electronic equipment, and belongs to the technical field of communication equipment. The disclosed sound production device comprises a shell and a sound production device main body, wherein an air inlet channel is formed in the shell, the sound production device main body is arranged in the shell, a rear cavity is formed by the sound production device main body and the shell, a coaming is arranged in the rear cavity, the rear cavity is divided into at least two resonant cavities by the coaming, each resonant cavity is communicated with the air inlet channel, and the resonant frequencies of the resonant cavities are different. According to the scheme, the problem that in the related art, the loudness of the sounding device is improved in a voltage increasing mode, so that the hearing of the sounding device is poor can be solved.
Description
Technical Field
The application belongs to the technical field of communication equipment, and particularly relates to a sound generating device and electronic equipment.
Background
The electronic equipment is provided with the sounding device, and the sounding device is used for realizing the functions of answering and the like of the electronic equipment, so that the loudness of the sounding device needs to be improved for better realizing the answering function. In the related art, the loudness of the full frequency band is improved by increasing the voltage, but the sounding device works under the larger voltage for a long time, so that nonlinear distortion is increased, and the hearing is influenced.
Disclosure of Invention
The embodiment of the application aims to provide a sound generating device and electronic equipment, which can solve the problem that the hearing of the sound generating device is poor due to the fact that the loudness of the sound generating device is improved by increasing voltage in the related technology.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, the present invention discloses a sound emitting device comprising a housing and a sound emitting device body, wherein: the shell is provided with an air inlet channel, the sounding device main body is arranged in the shell, the sounding device main body and the shell form a rear cavity, a coaming is arranged in the rear cavity, the coaming divides the rear cavity into at least two resonant cavities, the resonant cavities are communicated with the air inlet channel, and the resonant frequencies of the resonant cavities are different.
In a second aspect, the invention also discloses an electronic device comprising the sound emitting device.
In the embodiment of the application, the coaming is arranged in the rear cavity of the sound generating device, the coaming divides the rear cavity into at least two resonant cavities, the resonant frequencies of the two resonant cavities are different, the two resonant frequencies are overlapped to form a resonant frequency band, and the sensitivity of the frequency band which is equal to the frequency of the resonant frequency band in sound waves is improved, so that the loudness of the frequency band is improved, and the loudness of the sound generating device is further improved. Therefore, the sounding device disclosed by the application can solve the problem of poor hearing of the sounding device caused by the fact that the loudness of the sounding device is improved by increasing the voltage in the related technology.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a sound emitting device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a first housing of a sound emitting device according to an embodiment of the present application;
FIG. 3 is a schematic view of another internal structure of a sound emitting device according to an embodiment of the present application;
FIG. 4 is a schematic view of a cover plate according to an embodiment of the present application;
FIG. 5 is an equivalent circuit diagram of a sound emitting device disclosed in an embodiment of the present application;
Fig. 6 is a graph of simulation of a sound emitting device according to an embodiment of the present application and a sound emitting device according to the prior art.
Reference numerals illustrate:
100-a shell, 110-an air inlet channel, 120-a first shell, 130-a second shell,
200-Sounding device main body, 210-vibrating diaphragm,
310-Rear cavity, 320-front cavity,
410-First coaming, 411-first through hole, 420-second coaming, 421-second through hole, 430-coaming, 431-receiving cavity, 440-third coaming, 441-third through hole, 450-fourth coaming, 451-fourth through hole,
510-First resonant cavity, 520-second resonant cavity, 521-first resonant channel, 5211-first sub-resonant cavity, 5212-first pipeline, 522-second resonant channel, 5221-second sub-resonant cavity, 5222-second pipeline, 523-third resonant channel, 530-third resonant cavity,
610-A first film, 620-a second film,
700-Cover plate,
800-Heat dissipation structure,
900-Dustproof structural member.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
Referring to fig. 1 to 6, an embodiment of the present application discloses a sound emitting device, and the disclosed sound emitting device may be used in an electronic device. The disclosed sound emitting device includes a housing 100 and a sound emitting device body 200.
The housing 100 is a base member of the sound emitting device, providing a mounting base for a portion of the functional devices of the sound emitting device, such as the sound emitting device body 200.
The sound generating device main body 200 is arranged in the shell 100, the sound generating device main body 200 is used for generating sound waves, the vibrating diaphragm 210 of the sound generating device main body 200 generates sound to vibrate in the working process of the sound generating device, and the vibration of the vibrating diaphragm 210 pushes nearby air, so that sound waves are generated, and the sound generation of the sound generating device is realized.
The housing 100 is provided with an air inlet passage 110, and the air inlet passage 110 communicates with the outside. The sound emitting device main body 200 and the housing 100 form a rear cavity 310 and a front cavity 320, and a dustproof structural member 900 is arranged at a port (i.e., a sound outlet) of the front cavity 320, so that dust and the like can be prevented from entering the front cavity 320, and sound waves generated by the sound emitting device main body 200 can be transmitted to the outside of the sound emitting device through the sound outlet.
The back cavity 310 is internally provided with a coaming, the coaming divides the back cavity 310 into at least two resonant cavities, each resonant cavity is communicated with the air inlet channel 110, so that outside air can enter each resonant cavity, and the air in each resonant cavity can be discharged to the outside. Optionally, a dust-proof member, such as a dust-proof net, may be provided in the air inlet passage 110 to prevent foreign dust and the like from entering the inside of the sound emitting device, and the dust-proof member may also change the acoustic resistance of the rear chamber 310.
The air in the resonant cavity generates resonance, so that the sensitivity of the frequency equal to the resonance frequency of the resonant cavity in the sound wave can be improved, and the loudness of the frequency in the sound wave is improved. In the embodiment disclosed in the present application, the coaming divides the rear cavity 310 into at least two resonant cavities, and the resonant frequencies of the resonant cavities are different, so that the resonant frequencies of the resonant cavities are overlapped to form a resonant frequency band, thereby improving the sensitivity of the frequency band equal to the frequency of the resonant frequency band in the sound wave. That is, by controlling the resonance frequency of each resonant cavity, the sensitivity of the specific frequency band in the sound wave can be improved, and the loudness of the specific frequency band can be further improved, for example, by controlling the resonance frequency of each resonant cavity, the frequency of the resonance frequency of each resonant cavity is equal to the frequency of the low frequency band in the sound wave, and the loudness of the low frequency band in the sound wave is further improved.
In the embodiment of the present application, the coaming divides the rear cavity 310 into at least two resonant cavities, the resonant frequencies of the two resonant cavities are different, the resonant frequencies of the two resonant cavities are overlapped to form a resonant frequency band, the sensitivity of a frequency band equal to the frequency of the resonant frequency band in the sound wave emitted by the sound emitting device main body 200 is improved, and further the loudness of the frequency band in the sound wave is improved. Therefore, the sounding device disclosed by the application can solve the problem of poor hearing of the sounding device caused by the fact that the loudness of the sounding device is improved by increasing the voltage in the related technology.
In addition, promote the loudness of sound production device through the mode of increase voltage, the voice coil loudspeaker voice coil calorific capacity in the sound production device increases, and under the condition that sound production device installs in electronic equipment, the heat that the voice coil loudspeaker voice coil produced can transmit to electronic equipment's equipment casing on, leads to electronic equipment's equipment casing temperature to rise, influences user's use experience. The sounding device disclosed by the embodiment of the application avoids the problem that the temperature of the shell of the electronic equipment is increased due to the fact that the loudness of the sounding device is increased in a voltage increasing mode and the heating value of the sounding device is increased. In addition, promote the loudness of sound production device through the mode of increase voltage, lead to the electric quantity increase that sound production device consumed, under the condition that sound production device installed in electronic equipment, can cause electronic equipment's duration to become poor, influence user's use experience. The sounding device disclosed by the embodiment of the application avoids the problem of high power consumption of electronic equipment caused by high power consumption of the sounding device due to the fact that the loudness of the sounding device is increased in a voltage increasing mode.
The number of coamings may be one or more. Optionally, the enclosure may include a first enclosure 410 and a second enclosure 420, where one side of the first enclosure 410 near the air inlet channel 110 forms a first resonant cavity 510, and the first resonant cavity 510 is communicated with the air inlet channel 110, a second resonant cavity 520 is formed between the first enclosure 410 and the second enclosure 420, one side of the second enclosure 420 facing away from the air inlet channel 110 forms a third resonant cavity 530, and the first resonant cavity 510, the second resonant cavity 520 and the third resonant cavity 530 are sequentially communicated, so that air entering through the air inlet channel 110 can sequentially circulate to the first resonant cavity 510, the second resonant cavity 520 and the third resonant cavity 530, and resonant frequencies of the first resonant cavity 510, the second resonant cavity 520 and the third resonant cavity 530 are different. In this case, compared with the case of arranging one coaming and dividing the rear cavity 310 into two resonant cavities, the sounding device disclosed by the embodiment of the application increases the number of resonant cavities in the rear cavity 310 by arranging the first coaming 410 and the second coaming 420 in the rear cavity 310, and widens the range of resonant frequency bands formed by superposition of the resonant cavities, so that the sensitivity of the frequency bands in a larger range in sound waves can be improved, the loudness of the frequency bands in the sound waves in the larger range can be improved, and a user can obtain better use experience.
Alternatively, the first enclosing plate 410 may be provided with a first through hole 411, the first resonant cavity 510 and the second resonant cavity 520 may be communicated through the first through hole 411, the second enclosing plate 420 may be provided with a second through hole 421, and the second resonant cavity 520 and the third resonant cavity 530 may be communicated through the second through hole 421. In this case, sequential communication of the first resonant cavity 510, the second resonant cavity 520, and the third resonant cavity 530 is achieved through the first through hole 411 and the second through hole 421, and the first resonant cavity 510 is communicated with the air intake passage 110, so that communication of the first resonant cavity 510, the second resonant cavity 520, and the third resonant cavity 530 with the air intake passage 110 is achieved.
To further enhance the sensitivity of a wider range of frequency bands in the acoustic wave, a first resonant passage 521 and a second resonant passage 522 may be provided in the second resonant cavity 520 in communication. Optionally, the sound generating device may further include a third surrounding plate 440, where the third surrounding plate 440 is disposed within the second resonant cavity 520, and a first resonant channel 521 may be formed between the third surrounding plate 440 and the first surrounding plate 410, and a second resonant channel 522 may be formed between the third surrounding plate 440 and the second surrounding plate 420, and the third surrounding plate 440 may be provided with a third through hole 441, so that the first resonant channel 521 is communicated with the second resonant channel 522 through the third through hole 441. In this case, by dividing the second resonant cavity 520 into the first resonant channel 521 and the second resonant channel 522, the total number of resonant cavities in the rear cavity 310 is increased, so as to further improve the sensitivity of a wider range of frequency bands in the acoustic wave, and further improve the loudness of a wider range of frequency bands in the acoustic wave.
The first resonant passage 521 may include at least two first sub-resonant cavities 5211 that are sequentially connected, and the resonant frequencies of the respective first sub-resonant cavities 5211 are different. The specific number of the first sub-resonators 5211 is not limited, and may be adjusted according to design requirements, for example, the number of the first sub-resonators 5211 may be three.
The second resonant passage 522 may include at least two second sub-resonant cavities 5221 which are sequentially connected, and the resonant frequencies of the respective second sub-resonant cavities 5221 are different. The specific number of the second sub-resonators 5221 is not limited, and may be adjusted according to design requirements, for example, the number of the second sub-resonators 5221 may be three.
In the case where the first resonant passage 521 includes at least two first sub-resonant cavities 5211 and the second resonant passage 522 includes at least two second sub-resonant cavities 5221, the resonant frequencies of the respective first sub-resonant cavities 5211 and the respective second sub-resonant cavities 5221 are also different.
In the embodiment of the present application, the second resonant cavity 520 is divided into a plurality of sub-resonant cavities, which further increases the number of resonant cavities in the rear cavity 310, further widens the range of resonant frequency bands formed by superposition of the resonant cavities, and further improves the sensitivity of a frequency band in a larger range in the sound wave, and further improves the loudness of a frequency band in a larger range in the sound wave.
The resonant frequency of the resonant cavities is different if the volumes of the resonant cavities are different, and in the embodiment disclosed by the application, the resonant frequency of each resonant cavity can be controlled by controlling the volumes of the resonant cavities. In a further embodiment, the first resonant passage 521 may further include a first pipe 5212, where any two adjacent first sub-resonant cavities 5211 are all communicated through the first pipe 5212, and the volume of the first pipe 5212 may affect the resonant frequency of the adjacent first sub-resonant cavity 5211. In this case, the volume of the first pipe 5212 can be changed to change the resonance frequencies of the two adjacent first sub-resonant cavities 5211, so that the method for adjusting the expected resonance frequency of each first sub-resonant cavity 5211 is more and the adjustability is larger, and further, the requirement that the resonance frequencies of the resonant cavities are different can be met under the condition that the number of the resonant cavities is large.
The second resonant passage 522 may further include a second conduit 5222, and any two adjacent second sub-resonant cavities 5221 are all communicated by the second conduit 5222. Similarly, in this case, the volume of the second pipe 5222 can change the resonant frequencies of the two adjacent second sub-resonant cavities 5221, so that the expected resonant frequencies of the second sub-resonant cavities 5221 can be adjusted more and more, and further, the requirement of different resonant frequencies of the resonant cavities can be met under the condition that the number of the resonant cavities is more.
In a further technical solution, the sound generating device may further include a first film 610 and a first mass block, where the first film 610 is disposed at the communication position of any two adjacent first sub-resonators 5211, and the first mass block is attached to the first film 610. Alternatively, the first mass may be bonded to the first membrane 610. In this case, the compliance of the first film 610 may be equivalent to the first sub-resonant cavity 5211 located downstream thereof in the air flow direction of the first resonant passage 521, the additional mass of the first mass may be equivalent to the first sub-resonant cavity 5211 located downstream thereof in the air flow direction of the first resonant passage 521, and the first resonant passage 521 may obtain a larger additional acoustic compliance by controlling the compliance of the first film 610 and the additional mass of the first mass, thereby increasing the equivalent volume of the first resonant passage 521, increasing the equivalent volume of the rear cavity 310, and finally improving the acoustic performance of the acoustic device.
In a further technical solution, the sound generating device may further include a second film 620 and a second mass, where the second film 620 is disposed at the communication position of any two adjacent second sub-resonators 5221, and the second mass is attached to the second film 620. Alternatively, the second mass may be bonded to the second membrane 620. In this case, the compliance of the second film 620 may be equivalent to the second sub-resonant cavity 5221 located downstream thereof in the air flow direction of the second resonant passage 522, the additional mass of the second mass may be equivalent to the second sub-resonant cavity 5221 located downstream thereof in the air flow direction of the second resonant passage 522, and the second resonant passage 522 may obtain a larger additional acoustic compliance by controlling the compliance of the second film 620 and the additional mass of the second mass, thereby increasing the equivalent volume of the second resonant passage 522, increasing the equivalent volume of the rear cavity 310, and finally improving the acoustic performance of the acoustic device.
In a further embodiment, the first resonant passage 521 and the second resonant passage 522 are spaced apart such that a third resonant passage 523 is formed between the first resonant passage 521 and the second resonant passage 522. Optionally, the sound generating device may further include a fourth surrounding board 450, where the third surrounding board 440 and the fourth surrounding board 450 are arranged at intervals, a first resonant channel 521 is formed between the first surrounding board 410 and the third surrounding board 440, a third resonant channel 523 is formed between the third surrounding board 440 and the fourth surrounding board 450, a second resonant channel 522 is formed between the fourth surrounding board 450 and the second surrounding board 420, and the fourth surrounding board 450 may be provided with a fourth through hole 451, so that the third resonant channel 523 is communicated with the second resonant channel 522 through the fourth through hole 451.
Under the condition that the volume of the second resonant cavity 520 is fixed, the space in the second resonant cavity 520 can be fully utilized, the second resonant cavity 520 is divided into more resonant cavities, the sensitivity of the frequency band with a larger range in the sound wave is further improved, and the loudness of the frequency band with a larger range in the sound wave is further improved.
The first resonant cavity 510, each first sub-resonant cavity 5211, the third resonant channel 523, each second sub-resonant cavity 5221, and the third resonant cavity 530 have different resonant frequencies. The resonant frequency of each resonant cavity can be adjusted according to design requirements, and the application is not limited to specific numerical values. In an alternative embodiment, the resonant frequency of the first resonant cavity 510 may be 123Hz, the resonant frequency of each first sub-resonant cavity 5211 may be 217Hz, 335Hz, 404Hz along the gas flow direction in the first resonant channel 521, the resonant frequency of the third resonant channel 523 may be 501Hz, the resonant frequency of each second sub-resonant cavity 5221 may be 614Hz, 709Hz, 818Hz along the gas flow direction in the second resonant channel 522, the resonant frequency of the third resonant cavity 530 may be 1000Hz, and the resonant frequency of each resonant cavity may be 123-1000Hz.
In order to better protect the sound generating device main body 200, the sound generating device may further include a surrounding block 430, where the surrounding block 430 and the housing 100 enclose a receiving cavity 431, and the sound generating device main body 200 is disposed in the receiving cavity 431.
In the gas flow direction of the first resonance passage 521, one end of the first resonance passage 521 communicates with the first resonance chamber 510 and the second resonance passage 522, and the other end of the first resonance passage 521 is connected to the enclosure 430. In the gas flow direction of the second resonance passage 522, one end of the second resonance passage 522 communicates with the first resonance passage 521 and the third resonance chamber 530, and the other end of the second resonance passage 522 is connected to the enclosure 430. In this case, the enclosure 430 can also assist in forming the first resonant channel 521 and the second resonant channel 522, so as to play a role in dual purposes, and the structure can save the material for blocking the other end of the first resonant channel 521 and the other end of the second resonant channel 522, so as to play a role in saving the cost and reducing the weight of the sounding device.
The structure of the housing 100 may be varied, and in an alternative embodiment, the housing 100 may include a first housing 120 and a second housing 130 connected to each other, where the first housing 120 and the second housing 130 enclose an accommodating space, and the sound emitting device body 200, the first enclosure 410, and the second enclosure 420 are disposed in the accommodating space. Optionally, the first housing 120 is detachably connected to the second housing 130, so as to facilitate subsequent overhauling of functional devices such as the sound emitting device main body 200 in the housing 100.
In the above scheme, the second resonant cavity 520 is formed between the first coaming 410 and the second coaming 420, two opposite sides of the first coaming 410 and two opposite sides of the second coaming 420 can be respectively connected to the first casing 120 and the second casing 130, but in order to ensure the sealing performance of the second resonant cavity 520, the above structure has higher requirement on the matching precision between the first casing 120, the second casing 130, the first coaming 410 and the second coaming 420, greatly improves the installation difficulty, and easily generates assembly errors in the installation process, so that the sealing performance of the second resonant cavity 520 is poor.
To solve the above problem, the sound emitting device may further include a cover plate 700, and the first and second enclosures 410 and 420 may be both connected to the bottom wall of the first housing 120, and the cover plate 700 may be hermetically connected to a side of the first and second enclosures 410 and 420 facing away from the bottom wall. Alternatively, the sealed connection of the first and second enclosures 410, 420 to the cover plate 700 may be achieved by foam. In this case, the second resonant cavity 520 is sealed by the cover plate 700, so that the sealing performance of the second resonant cavity 520 can be ensured, and the installation difficulty can be reduced.
In the embodiment of the present application, the sound generating device may further include a heat dissipation structure 800, where the heat dissipation structure 800 is disposed on the housing 100, and the heat dissipation structure 800 is communicated with the rear cavity 310, and the heat dissipation structure 800 is communicated with the outside. Alternatively, the heat dissipating structure 800 may be a heat dissipating hole. Under the condition, the heat dissipation of the sounding device is facilitated, and the phenomenon that the normal use of each functional device of the sounding device is influenced due to the fact that more heat is accumulated in the sounding device is avoided.
Referring to fig. 5 again, fig. 5 is an equivalent circuit diagram of the back cavity 310 of the sound generating device, where the first resonant channel 521 includes three first sub-resonant cavities 5211, and the second resonant channel 522 includes three second sub-resonant cavities 5221, mms1 represents the equivalent sound quality of the first resonant cavity 510, mms2, mms3, and mms4 represent the equivalent sound quality of the three first sub-resonant cavities 5211 of the first resonant channel 521 in the gas flow direction, mms5 represents the equivalent sound quality of the third resonant channel 523, mms6, mms7, and mms8 represent the equivalent sound quality of the three second sub-resonant cavities 5221 of the second resonant channel 522 in the gas flow direction, mms9 represents the equivalent sound quality of the third resonant cavity 530, cms1 and cms2 … … cms9 represent the equivalent sound compliance of each resonant cavity in the above order, rms1 and rms2 … … s9 represent the equivalent sound quality of each resonant cavity in the above order, and the acoustic compliance of multiple resonant cavities can be adjusted to obtain a composite acoustic modulus greater than that of the acoustic parameters of the second resonant cavity 310.
Referring to fig. 6 again, fig. 6 is a simulation graph of the sound emitting device, and the simulation condition is sound pressure at a distance of 10cm from the sound emitting device under rated power. The solid line represents the sensitivity curve of each frequency band of the sounding device in the prior art, and the dotted line represents the sensitivity curve of each frequency band of the sounding device disclosed in the embodiment of the present application. According to simulation results, the loudness of the sounding device disclosed by the application is larger in a larger part of frequency bands, especially in low and medium frequency bands. The equivalent acoustic compliance of the rear cavity 310 is increased by the resonance cavity parts, the equivalent volume of the rear cavity 310 is increased, the effects of reducing f0 and pulling up low frequency can be realized, meanwhile, the vibration quality is reduced by the negative equivalent density generated by resonance of the resonance cavities, the first films 610 and the second films 620, and the intermediate frequency sensitivity is improved.
Based on the sound emitting device of the above embodiment of the present application, the embodiment of the present application further discloses an electronic device, where the disclosed electronic device includes the sound emitting device of the above embodiment, so that the electronic device also has the technical effects achieved by the above sound emitting device, and will not be described herein again.
The electronic device disclosed by the embodiment of the application can be a smart phone, a tablet personal computer, an electronic reader or a wearable device. Of course, the electronic device may be another device, which is not limited in accordance with the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (7)
1. A sound emitting device comprising a housing (100) and a sound emitting device body (200), wherein: the sound generating device comprises a shell (100), a sound generating device main body (200) and a shell (100), wherein the shell (100) is provided with an air inlet channel (110), the sound generating device main body (200) is arranged in the shell (100), the sound generating device main body (200) and the shell (100) form a rear cavity (310), a coaming is arranged in the rear cavity (310), the coaming divides the rear cavity (310) into at least two resonant cavities, and each resonant cavity is communicated with the air inlet channel (110);
The coaming comprises a first coaming (410) and a second coaming (420), a first resonant cavity (510) is formed on one side, close to the air inlet channel (110), of the first coaming (410), a second resonant cavity (520) is formed between the first coaming (410) and the second coaming (420), a third resonant cavity (530) is formed on one side, away from the air inlet channel (110), of the second coaming (420), the first resonant cavity (510), the second resonant cavity (520) and the third resonant cavity (530) are sequentially communicated, and resonant frequencies of the first resonant cavity (510), the second resonant cavity (520) and the third resonant cavity (530) are different;
The second resonant cavity (520) is internally provided with a first resonant channel (521) and a second resonant channel (522) which are communicated, wherein:
The first resonant channel (521) comprises a first pipeline (5212) and at least two first sub-resonant cavities (5211) which are communicated in sequence, any two adjacent first sub-resonant cavities (5211) are communicated through the first pipeline (5212), and the resonant frequencies of the first sub-resonant cavities (5211) are different; and/or the number of the groups of groups,
The second resonant channel (522) comprises a second pipeline (5222) and at least two second sub-resonant cavities (5221) which are communicated in sequence, any two adjacent second sub-resonant cavities (5221) are communicated through the second pipeline (5222), and the resonant frequencies of the second sub-resonant cavities (5221) are different.
2. The sound emitting device according to claim 1, further comprising a first membrane (610) and a first mass, wherein the first membrane (610) is arranged at the communication position of any two adjacent first sub-cavities (5211), and the first mass is attached to the first membrane (610); and/or the number of the groups of groups,
The sound generating device further comprises a second film (620) and a second mass block, wherein the second film (620) is arranged at the communication position of any two adjacent second sub-resonant cavities (5221), and the second mass block is attached to the second film (620).
3. The sound emitting device of claim 1, wherein the first resonant channel (521) and the second resonant channel (522) are spaced apart such that a third resonant channel (523) is formed between the first resonant channel (521) and the second resonant channel (522).
4. The sound emitting device according to claim 1, further comprising a baffle (430), wherein the baffle (430) and the housing (100) enclose a receiving cavity (431), the sound emitting device body (200) is disposed in the receiving cavity (431), one end of the first resonant channel (521) is in communication with the first resonant cavity (510) and the second resonant channel (522) in a gas flow direction of the first resonant channel (521), the other end of the first resonant channel (521) is connected to the baffle (430), one end of the second resonant channel (522) is in communication with the first resonant channel (521) and the third resonant cavity (530) in a gas flow direction of the second resonant channel (522), and the other end of the second resonant channel (522) is connected to the baffle (430).
5. The sound emitting device according to claim 1, wherein the housing (100) comprises a first housing (120) and a second housing (130) which are connected, the first housing (120) and the second housing (130) enclose an accommodating space, the first enclosure (410) and the second enclosure (420) are both connected to a bottom wall of the first housing (120), the sound emitting device further comprises a cover plate (700), and the cover plate (700) is in sealing connection with a side of the first enclosure (410) and the second enclosure (420) facing away from the bottom wall.
6. The sound emitting device of claim 1, further comprising a heat dissipating structure (800), wherein the heat dissipating structure (800) is disposed on the housing (100), and wherein the heat dissipating structure (800) is in communication with the rear cavity (310).
7. An electronic device comprising the sound emitting device of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940540.8A CN113676581B (en) | 2021-08-17 | 2021-08-17 | Sound producing device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940540.8A CN113676581B (en) | 2021-08-17 | 2021-08-17 | Sound producing device and electronic equipment |
Publications (2)
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| CN113676581A (en) | 2021-11-19 |
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