阅读说明：本技术 发声器件及电子设备 (Sound production device and electronic equipment ) 是由 付同庆 龙立锋 于 2021-08-17 设计创作，主要内容包括：本申请公开一种发声器件及电子设备,属于通信设备技术领域。所公开的发声器件包括壳体和发声器件主体,壳体开设有进气通道,发声器件主体设于壳体内,发声器件主体与壳体形成后腔,后腔内设有围板,围板将后腔分为至少两个谐振腔,各个谐振腔与进气通道连通,且各个谐振腔的共振频率不同。上述方案能够解决相关技术中,通过增大电压的方式提升发声器件的响度,而造成发声器件的听感较差的问题。(The application discloses sounding device and electronic equipment belongs to communication equipment technical field. The disclosed sounding device comprises a shell and a sounding device main body, wherein an air inlet channel is formed in the shell, the sounding device main body is arranged in the shell, the sounding device main body and the shell form a rear cavity, a surrounding plate is arranged in the rear cavity, the surrounding plate divides the rear cavity into at least two resonant cavities, 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, and the hearing of the sounding device is poor is solved.)

1. A sounder device comprising a housing (100) and a sounder device body (200), wherein: air inlet channel (110) have been seted up to casing (100), sound production device main part (200) are located in casing (100), sound production device main part (200) with casing (100) form rear chamber (310), be equipped with the bounding wall in rear chamber (310), the bounding wall will rear chamber (310) divide into two at least resonant cavities, each the resonant cavity with air inlet channel (110) intercommunication, and each the resonant frequency of resonant cavity is different.

2. The sound production device according to claim 1, wherein the enclosing plates comprise a first enclosing plate (410) and a second enclosing plate (420), a side of the first enclosing plate (410) close to the air inlet channel (110) forms a first resonant cavity (510), a second resonant cavity (520) is formed between the first enclosing plate (410) and the second enclosing plate (420), a side of the second enclosing plate (420) far away from the air inlet channel (110) forms a third resonant cavity (530), the first resonant cavity (510), the second resonant cavity (520) and the third resonant cavity (530) are communicated in sequence, and the resonant frequencies of the first resonant cavity (510), the second resonant cavity (520) and the third resonant cavity (530) are different.

3. The sound production device as claimed in claim 2, wherein the second resonant cavity (520) is provided therein with a first resonant channel (521) and a second resonant channel (522) communicating with each other, wherein:

the first resonant channel (521) comprises at least two first sub-resonant cavities (5211) which are communicated in sequence, and the resonant frequencies of the first sub-resonant cavities (5211) are different; and/or the presence of a gas in the gas,

the second resonance channel (522) comprises at least two second sub-resonance cavities (5221) which are communicated in sequence, and the resonance frequency of each second sub-resonance cavity (5221) is different.

4. The sounding device according to claim 3, characterized in that the first resonant channel (521) further comprises a first conduit (5212), any two adjacent first sub-resonant cavities (5211) being in communication through the first conduit (5212); and/or the presence of a gas in the gas,

the second resonance passage (522) further includes a second conduit (5222), and any adjacent two of the second sub-resonance chambers (5221) communicate through the second conduit (5222).

5. The sounder device according to claim 3, further comprising a first membrane (610) and a first mass, wherein a communication position of any adjacent two of the first sub-cavities (5211) is provided with the first membrane (610), and the first mass is attached to the first membrane (610); and/or the presence of a gas in the gas,

the sounding device further comprises a second film (620) and a second mass block, 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).

6. A sounder device according to claim 3, wherein said first resonant channel (521) and said second resonant channel (522) are spaced apart such that a third resonant channel (523) is formed between said first resonant channel (521) and said second resonant channel (522).

7. The sounder device according to claim 3, further comprising a surround (430), the enclosure (430) and the shell (100) enclose an accommodating cavity (431), the sounder body (200) is arranged in the accommodating cavity (431), one end of the first resonance passage (521) communicates with the first resonance cavity (510) and the second resonance passage (522) in a gas flow direction of the first resonance passage (521), the other end of the first resonant channel (521) is connected to the enclosure (430), one end of the second resonance passage (522) communicates with the first resonance passage (521) and the third resonance cavity (530) in a gas flow direction of the second resonance passage (522), the other end of the second resonant channel (522) is connected to the enclosure (430).

8. The sounder device according to claim 2, wherein the housing (100) comprises a first housing (120) and a second housing (130) connected to each other, the first housing (120) and the second housing (130) enclose a receiving space, the first enclosure (410) and the second enclosure (420) are both connected to a bottom wall of the first housing (120), and the sounder device further comprises a cover plate (700), and the cover plate (700) is hermetically connected to sides of the first enclosure (410) and the second enclosure (420) facing away from the bottom wall.

9. The sounder device according to 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).

10. An electronic device comprising a sound producing device as claimed in any one of claims 1 to 9.

Technical Field

The application belongs to the technical field of communication equipment, and particularly relates to a sounding device and electronic equipment.

Background

The electronic equipment is provided with the sounding device, the functions of answering and the like of the electronic equipment are realized through the sounding device, and in order to better realize the answering function, the loudness of the sounding device needs to be improved. In the related art, the loudness of the full frequency band is increased by increasing the voltage, but the sounding device operates at a higher voltage for a long time, which increases the nonlinear distortion and affects the hearing sensation.

Disclosure of Invention

The embodiment of the application aims to provide a sounding device and electronic equipment, and the problem that the sound sensation of the sounding device is poor due to the fact that the loudness of the sounding device is improved in a voltage increasing mode in the related art can be solved.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, the present invention discloses a sound device, comprising a housing and a sound device body, wherein: the shell is provided with an air inlet channel, the sound production device main body is arranged in the shell, the sound production device main body and the shell form a rear cavity, a surrounding plate is arranged in the rear cavity, the surrounding plate divides the rear cavity into at least two resonant cavities, each resonant cavity is communicated with the air inlet channel, and the resonant frequencies of the resonant cavities are different.

In a second aspect, the invention further discloses an electronic device, which comprises the sound production device.

In this application embodiment, be equipped with the bounding wall in the rear chamber of vocal device, the bounding wall divide into two at least resonant cavities with the rear chamber, and the resonant frequency of two resonant cavities is different, and two resonant frequency superposes and constitute resonant frequency range, and the sensitivity of the frequency channel that equals this resonant frequency range in the sound wave improves for the loudness of this frequency channel improves, and then has promoted the loudness of vocal device. Therefore, the sounding device disclosed by the application can solve the problem that the sound of the sounding device is poor due to the fact that the loudness of the sounding device is improved in a voltage increasing mode in the related art.

Drawings

Fig. 1 is a schematic view of an internal structure of a sound production device disclosed in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first housing of the sound production device disclosed in the embodiment of the present application;

FIG. 3 is a schematic view of another angle of the internal structure of the sound device disclosed in the embodiments of the present application;

FIG. 4 is a schematic structural diagram of a cover plate disclosed in an embodiment of the present application;

FIG. 5 is an equivalent circuit diagram of a sound device disclosed in an embodiment of the present application;

fig. 6 is a simulation graph of the sound production device disclosed in the embodiment of the present application and the sound production device in the prior art.

Description of reference numerals:

100-shell, 110-air inlet channel, 120-first shell, 130-second shell,

200-sounding device main body, 210-vibrating diaphragm,

310-rear cavity, 320-front cavity,

410-a first enclosing plate, 411-a first through hole, 420-a second enclosing plate, 421-a second through hole, 430-an enclosing baffle, 431-a containing cavity, 440-a third enclosing plate, 441-a third through hole, 450-a fourth enclosing plate, 451-a fourth through hole,

510-a first resonant cavity, 520-a second resonant cavity, 521-a first resonant channel, 5211-a first sub-resonant cavity, 5212-a first pipe, 522-a second resonant channel, 5221-a second sub-resonant cavity, 5222-a second pipe, 523-a third resonant channel, 530-a third resonant cavity,

610-the first film, 620-the second film,

700-cover plate,

800-heat dissipation structure,

900-dustproof structure.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

Referring to fig. 1 to 6, a sound device is disclosed in an embodiment of the present application, and the disclosed sound device can be used in an electronic device. The disclosed sounder device includes a housing 100 and a sounder device body 200.

The housing 100 is a base member of the sound device and provides a mounting base for a part of the functional devices of the sound device, such as the sound device body 200.

The sounding device main body 200 is arranged in the shell 100, the sounding device main body 200 is used for emitting sound waves, in the working process of the sounding device, the vibrating diaphragm 210 of the sounding device main body 200 emits sound and vibrates, and the vibration of the vibrating diaphragm 210 pushes the air nearby, so that the sound waves are generated, and the sounding of the sounding device is realized.

The housing 100 is opened with an intake passage 110, and the intake passage 110 communicates with the outside. The sound-generating device main body 200 and the casing 100 form a rear cavity 310 and a front cavity 320, a dust-proof structure 900 is disposed at a port (i.e., a sound outlet) of the front cavity 320, so as to prevent dust and the like from entering the front cavity 320, and sound waves generated by the sound-generating device main body 200 can be transmitted to the outside of the sound-generating device through the sound outlet.

A surrounding plate is arranged in the rear cavity 310, the surrounding plate divides the rear cavity 310 into at least two resonant cavities, and each resonant cavity is communicated with the air inlet channel 110, so that external 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 disposed in the air intake passage 110 to prevent external dust and other substances from entering the interior of the sound-generating device, and the dust-proof member may also change the acoustic resistance of the rear cavity 310.

The air in the resonant cavity generates resonance, so that the sensitivity of the frequency in the sound wave, which is equal to the resonance frequency of the resonant cavity, can be improved, and the loudness of the frequency in the sound wave is further improved. In the embodiment disclosed in the present application, the back cavity 310 is divided into at least two resonant cavities by the enclosing plate, and the resonant frequencies of the resonant cavities are different, so that the resonant frequencies of the resonant cavities are superposed to form a resonant frequency band, thereby improving the sensitivity of the frequency band in the sound wave, which is equal to the resonant frequency band. That is to say, by controlling the resonant frequency of each resonant cavity, the sensitivity of the specific frequency band in the sound wave can be improved, and further the loudness of the specific frequency band is improved, for example, by controlling the resonant frequency of each resonant cavity, the resonant frequency band formed by the resonant frequency of each resonant cavity is equal to the frequency of the low frequency band in the sound wave, and further the loudness of the low frequency band in the sound wave is improved.

In this application embodiment, the bounding wall divide into two at least resonant cavities with rear chamber 310, the resonant frequency of two resonant cavities is different, the resonant frequency stack of two resonant cavities constitutes resonant frequency, the sensitivity of the frequency channel that equals this resonant frequency channel in the sound wave that vocal ware main part 200 sent promotes, and then the loudness of this frequency channel in the sound wave has been improved, and, this kind of structure can reduce the influence of harmonic, improve the harmonic distortion of vocal ware, can also promote the tone quality of vocal ware when improving vocal ware loudness, bring better sense of hearing enjoyment for the user. Therefore, the sounding device disclosed by the application can solve the problem that the sound sensation of the sounding device is poor due to the fact that the loudness of the sounding device is improved in a voltage increasing mode in the related art.

In addition, the loudness of the sounding device is improved by increasing the voltage, the heat productivity of the voice coil in the sounding device is increased, and when the sounding device is installed on the electronic equipment, the heat produced by the voice coil can be transferred to the equipment shell of the electronic equipment, so that the temperature of the equipment shell of the electronic equipment is increased, and the use experience of a user is influenced. The sound production 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 sound production device is improved in a voltage increasing mode and the heat productivity of the sound production device is increased. In addition, the loudness of the sounding device is improved by increasing the voltage, so that the electric quantity consumed by the sounding device is increased, and the cruising ability of the electronic equipment is deteriorated and the use experience of a user is influenced under the condition that the sounding device is installed on the electronic equipment. The sound production device disclosed by the embodiment of the application avoids the problem that the power consumption of electronic equipment is large due to the fact that the loudness of the sound production device is improved by increasing the voltage and the power consumption of the sound production device is large.

The number of the enclosing plates can be one or more. Optionally, the enclosing plates may include a first enclosing plate 410 and a second enclosing plate 420, a first resonant cavity 510 is formed on one side of the first enclosing plate 410 close to the air inlet passage 110, the first resonant cavity 510 is communicated with the air inlet passage 110, a second resonant cavity 520 is formed between the first enclosing plate 410 and the second enclosing plate 420, a third resonant cavity 530 is formed on one side of the second enclosing plate 420 away from the air inlet passage 110, 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 passage 110 may sequentially flow 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 from each other. Under this kind of circumstances, for setting up a bounding wall, divide into the condition of two resonant cavities with rear chamber 310, the sound production device that this application embodiment disclosed is through setting up first bounding wall 410 and second bounding wall 420 in rear chamber 310, and then increase the quantity of resonant cavity in the rear chamber 310, widen the resonance frequency range's that each resonant cavity stack constitutes scope, thereby can promote the sensitivity of the frequency channel of wider range in the sound wave, and then realize improving the loudness of the frequency channel of wider range in the sound wave, make the user obtain better use and experience.

Optionally, 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, the first resonant cavity 510, the second resonant cavity 520, and the third resonant cavity 530 are sequentially communicated through the first through hole 411 and the second through hole 421, and the first resonant cavity 510 is communicated with the air inlet passage 110, so that the first resonant cavity 510, the second resonant cavity 520, and the third resonant cavity 530 are communicated with the air inlet passage 110.

In order to further enhance the sensitivity of a wider frequency band in the sound wave, a first resonant channel 521 and a second resonant channel 522 which are communicated with each other may be disposed in the second resonant cavity 520. Optionally, the sound generating device may further include a third enclosing plate 440, the third enclosing plate 440 is disposed inside the second resonant cavity 520, a first resonant channel 521 may be formed between the third enclosing plate 440 and the first enclosing plate 410, a second resonant channel 522 may be formed between the third enclosing plate 440 and the second enclosing plate 420, and the third enclosing plate 440 may be provided with a third through hole 441, where the third through hole 441 communicates the first resonant channel 521 with the second resonant channel 522. In this case, the second resonant cavity 520 is divided into the first resonant channel 521 and the second resonant channel 522, so that the total number of resonant cavities in the rear cavity 310 is increased, the sensitivity of a wider frequency band in the sound wave is further improved, and the loudness of the wider frequency band in the sound wave is further improved.

The first resonant passage 521 may include at least two first sub-resonant cavities 5211 communicated in sequence, and the resonant frequencies of the first sub-resonant cavities 5211 are different. The specific number of the first sub-resonant cavities 5211 is not limited and can be adjusted according to design requirements, for example, the number of the first sub-resonant cavities 5211 can be three.

The second resonant passage 522 may include at least two second sub-resonant cavities 5221 that are connected in series, each second sub-resonant cavity 5221 having a different resonant frequency. The specific number of the second sub-resonant cavities 5221 is not limited and can be adjusted according to design requirements, for example, the number of the second sub-resonant cavities 5221 can be three.

In the case where the first resonant channel 521 includes at least two first sub-resonant cavities 5211 and the second resonant channel 522 includes at least two second sub-resonant cavities 5221, the resonant frequencies of each first sub-resonant cavity 5211 and each second sub-resonant cavity 5221 are different.

In this embodiment, the second resonant cavity 520 is divided into a plurality of sub-resonant cavities, so that the number of the resonant cavities in the rear cavity 310 is further increased, and the range of the resonant frequency band formed by overlapping the resonant cavities is further widened, thereby further improving the sensitivity of a frequency band in a wider range in the sound wave, and further improving the loudness of the frequency band in the wider range in the sound wave.

In the embodiments disclosed herein, the resonant frequency of each resonant cavity can be controlled by controlling the volume of each resonant cavity. In a further technical solution, the first resonant passage 521 may further include a first conduit 5212, any two adjacent first sub-resonant cavities 5211 are communicated through the first conduit 5212, and the volume of the first conduit 5212 may affect the resonant frequency of the first sub-resonant cavity 5211 adjacent thereto. In this case, the resonant frequencies of the two adjacent first sub-resonant cavities 5211 can be changed by changing the volume of the first pipeline 5212, so that the expected resonant frequencies of the first sub-resonant cavities 5211 can be adjusted more, and the adjustability is greater, 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 greater.

The second resonant passage 522 may further include a second conduit 5222, and any two adjacent second sub-resonant cavities 5221 are communicated through the second conduit 5222. Similarly, in this case, the volume of the second conduit 5222 can change the resonant frequency of the two second sub-resonant cavities 5221 adjacent thereto, so that the expected resonant frequency of each second sub-resonant cavity 5221 can be adjusted more, and the adjustability is greater, and further, under the condition that the number of resonant cavities is greater, the requirement of different resonant frequencies of each resonant cavity can be met.

In a further technical solution, the sounder device may further include a first membrane 610 and a first mass, the first membrane 610 is disposed at a communication position of any two adjacent first sub-resonant cavities 5211, and the first mass is attached to the first membrane 610. Alternatively, the first proof mass may be bonded to the first membrane 610. In this case, the compliance of the first thin film 610 may be equivalent to the first sub-resonant cavity 5211 located downstream of the first thin film 610 in the airflow direction of the first resonant channel 521, the additional mass of the first mass may be equivalent to the first sub-resonant cavity 5211 located downstream of the first thin film 521 in the airflow direction of the first resonant channel 521, and by controlling the compliance of the first thin film 610 and the additional mass of the first mass, the first thin film 521 may obtain a larger additional acoustic compliance, so as to increase the equivalent volume of the first thin film 521, increase the equivalent volume of the rear cavity 310, and finally improve the acoustic performance of the acoustic device.

In a further technical solution, the sound generating device may further include a second membrane 620 and a second mass, the second membrane 620 is disposed at a communication position of any two adjacent second sub-resonant cavities 5221, and the second mass is attached to the second membrane 620. Alternatively, the second mass may be bonded to the second membrane 620. In this case, the compliance of the second membrane 620 may be equivalent to the second sub-resonant cavity 5221 located downstream of the second membrane 522 in the airflow direction of the second resonant channel 522, the additional mass of the second mass may be equivalent to the second sub-resonant cavity 5221 located downstream of the second membrane 522 in the airflow direction of the second resonant channel 522, and by controlling the compliance of the second membrane 620 and the additional mass of the second mass, the second resonant channel 522 may obtain a larger additional acoustic compliance, thereby increasing the equivalent volume of the second resonant channel 522, increasing the equivalent volume of the rear cavity 310, and finally improving the acoustic performance of the sound generating device.

In a further aspect, 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. Optionally, the sounding device may further include a fourth surrounding plate 450, the third surrounding plate 440 and the fourth surrounding plate 450 are disposed at an interval, a first resonant channel 521 is formed between the first surrounding plate 410 and the third surrounding plate 440, a third resonant channel 523 is formed between the third surrounding plate 440 and the fourth surrounding plate 450, a second resonant channel 522 is formed between the fourth surrounding plate 450 and the second surrounding plate 420, the fourth surrounding plate 450 may be provided with a fourth through hole 451, and 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 to divide the second resonant cavity 520 into more resonant cavities, so that the sensitivity of a frequency band in a larger range in the sound wave is further improved, and the loudness of the frequency band in the larger range in the sound wave is further improved.

The resonant frequencies of the first resonant cavity 510, each of the first sub-resonant cavities 5211, the third resonant passage 523, each of the second sub-resonant cavities 5221, and the third resonant cavity 530 are different from each other. The resonant frequency of each resonant cavity can be adjusted according to design requirements, and the application does not limit 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, respectively, 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, respectively, the resonant frequency of the third resonant cavity 530 may be 1000Hz, and the resonant frequency of the resonant cavities superimposed together is 123-1000Hz along the gas flow direction in the first resonant channel 521.

For better protection of the sounder device body 200, the sounder device may further include a surrounding wall 430, the surrounding wall 430 and the housing 100 define a receiving cavity 431, and the sounder device body 200 is disposed in the receiving cavity 431.

In the gas flow direction of the first resonant passage 521, one end of the first resonant passage 521 communicates with the first resonant cavity 510 and the second resonant passage 522, and the other end of the first resonant 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 cavity 530, and the other end of the second resonance passage 522 is connected to the enclosure 430. In this case, the enclosure 430 may also assist to form the first resonant channel 521 and the second resonant channel 522, so as to achieve a dual-purpose function, and this structure can save the material for sealing the other end of the first resonant channel 521 and the other end of the second resonant channel 522, thereby achieving the effects of saving cost and reducing the weight of the sound generating device.

The housing 100 may have various structures, and in an alternative embodiment, the housing 100 may include a first housing 120 and a second housing 130 connected to each other, the first housing 120 and the second housing 130 define a receiving space, and the sounder device body 200, the first enclosure 410, and the second enclosure 420 are disposed in the receiving space. Optionally, the first housing 120 is detachably connected to the second housing 130, so that the sound generating device main body 200 and other functional devices in the housing 100 can be easily repaired.

In the above scheme, the second resonant cavity 520 is formed between the first enclosing plate 410 and the second enclosing plate 420, the two sides of the first enclosing plate 410 opposite to each other and the two sides of the second enclosing plate 420 opposite to each other can be respectively connected to the first shell 120 and the second shell 130, however, in order to ensure the sealing performance of the second resonant cavity 520, the above structure has a high requirement on the matching precision between the first shell 120, the second shell 130, the first enclosing plate 410 and the second enclosing plate 420, the installation difficulty is greatly improved, and assembly errors are easily generated in the installation process, which results in poor sealing performance of the second resonant cavity 520.

In order to solve the above problem, the sound device may further include a cover plate 700, the first and second enclosure plates 410 and 420 may be connected to the bottom wall of the first housing 120, and the cover plate 700 may be hermetically connected to the sides of the first and second enclosure plates 410 and 420 facing away from the bottom wall. Optionally, the first and second enclosing plates 410 and 420 may be hermetically connected to the cover plate 700 by foam glue. In this case, the cover plate 700 seals the second resonant cavity 520, 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 device may further include a heat dissipation structure 800, the heat dissipation structure 800 is disposed on the housing 100, the heat dissipation structure 800 is communicated with the rear cavity 310, and the heat dissipation structure 800 is communicated with the outside. Optionally, the heat dissipation structure 800 may be a heat dissipation hole. Under the condition, the radiating 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 again to fig. 5, fig. 5 is an equivalent circuit diagram of the rear 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 acoustic mass of the first resonant cavity 510, Mms2, Mms3, Mms4 represent the equivalent acoustic mass of the three first sub-resonant cavities 5211 in the gas flow direction of the first resonant channel 521, Mms5 represents the equivalent acoustic mass of the third resonant channel 523, Mms6, Mms7, Mms8 represent the equivalent acoustic mass of the three second sub-resonant cavities 5221 in the gas flow direction of the second resonant channel 522, Mms9 represents the equivalent acoustic mass of the third resonant cavity 530, Mms1, Cms2 … …, Cms9 represent the equivalent acoustic sequence of the respective resonant cavities in the above-mentioned order, Rms1, Rms2 … …, Rms9 represent the respective equivalent acoustic modulus of the respective resonant cavities in the above-mentioned order, adjusting the above parameters may result in greater additional compliance of the rear chamber 310.

Referring again to fig. 6, fig. 6 is a graph showing a simulation of a sound generating device under a condition of sound pressure at a distance of 10cm from the sound generating device at a rated power. The solid line represents the sensitivity curve of each frequency band of the prior art sound-generating device, and the dotted line represents the sensitivity curve of each frequency band of the sound-generating device disclosed in the embodiment of the present application. According to the simulation result, it can be seen that, in the sound production device disclosed by the application, the loudness of the sound production device disclosed by the application is larger when the sensitivity of a larger part of frequency bands, particularly low and medium frequency bands, is better. The equivalent acoustic compliance of the rear cavity 310 is increased by the resonant cavities, the equivalent volume of the rear cavity 310 is increased, the effects of reducing f0 and raising the low frequency can be achieved, meanwhile, the negative equivalent density generated by the resonant cavities, the first thin films 610 and the second thin films 620 reduce the vibration quality, and the medium-frequency sensitivity is improved.

Based on the sound production device of the above-mentioned embodiment of the present application, an embodiment of the present application further discloses an electronic device, and the disclosed electronic device includes the sound production device in the above-mentioned embodiment, and therefore, the electronic device also has the technical effects achieved by the above-mentioned sound production device, and details are not repeated here.

The electronic equipment disclosed by the embodiment of the application can be a smart phone, a tablet computer, an electronic reader or wearable equipment. Of course, the electronic device may also be other devices, which is not limited in this embodiment of the application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.