CN114615592A - Electronic device - Google Patents

Abstract

The application discloses electronic equipment includes: the device comprises a device body, wherein the device body comprises a mounting cavity, a front cavity and a rear cavity, the front cavity and the rear cavity are positioned on two opposite sides of the mounting cavity, and the mounting cavity is respectively communicated with a first sound outlet of the front cavity and a second sound outlet of the rear cavity; the sounding device is arranged in the mounting cavity; the silencing device is arranged in the back cavity.

Description

Electronic equipment

technical field

The present application relates to the technical field of electronic devices, and in particular, to an electronic device.

Background technique

In order to reduce the sound wave leakage, in the related art, the back cavity opening of the sound-emitting device is designed, and the sound waves with opposite phases in the front cavity and the rear cavity are superimposed and canceled, thereby reducing the sound wave leakage.

However, the sound waves of the front cavity and the rear cavity of the sound-emitting device use the same sound source (both are generated by the diaphragm of the sound-emitting device), which makes it impossible to adjust the vibration frequency of the sound wave in the rear cavity, which leads to the sound wave in the front cavity and the rear cavity. The sound waves can only be superimposed and canceled in a specific frequency range, thus affecting the sound effect of the sound device.

SUMMARY OF THE INVENTION

The present application aims to provide an electronic device, at least solving the technical problem in the related art that the sound waves of the front sound cavity and the sound waves of the rear sound cavity can only be superimposed and canceled in a specific frequency band.

The embodiment of the present application proposes an electronic device, including: a device body, the device body includes an installation cavity, a front cavity and a rear cavity, the front cavity and the rear cavity are located on opposite sides of the installation cavity, and the installation cavity is respectively connected to the front cavity. The first sound outlet and the second sound outlet of the rear cavity; the sound-emitting device is arranged in the installation cavity; the sound-absorbing device is arranged in the rear cavity.

In the present application, the sound-generating device can generate the first sound wave in the front cavity; at the same time, the vibrating air in the rear cavity can cause the sound-absorbing device to vibrate and generate the second sound wave. In particular, since the front cavity and the rear cavity are located on opposite sides of the sound generating device, the phase of the second sound wave is opposite to that of the first sound wave. In this way, in the overall sound field of the electronic device, the second sound wave generated by the sound-absorbing device can be used to cancel at least part of the first sound wave, thereby reducing the sound wave leakage when the sound-emitting device is working.

In addition, the frequency of the second sound wave generated by the muffler device can be adjusted, so that the second sound wave and at least a part of the first sound wave can resonate in different frequency bands, so that the electronic device can reduce the specific frequency band in a more targeted manner. of sound leakage.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is one of partial cross-sectional views of an electronic device according to the present application;

Fig. 2 is one of partial structural schematic diagrams of an electronic device according to the present application;

Fig. 3 is the second partial cross-sectional view of an electronic device according to the present application;

4 is the second schematic diagram of the partial structure of an electronic device according to the present application;

Figure 5 is one of the exploded views of an electronic device according to the present application;

Figure 6 is the second exploded view of an electronic device according to the present application;

7 is a third exploded view of an electronic device according to the present application;

FIG. 8 is a comparison diagram of the sound field of the electronic device according to the embodiment of the present application and the electronic device in the related art.

Reference numerals in Figures 1 to 7:

100 electronic equipment, 102 equipment body, 104 installation cavity, 106 front cavity, 108 rear cavity, 110 sound device, 112 vibration source, 114 noise reduction device, 116 diaphragm, 118 counterweight, 120 bracket, 122 first sound outlet , 124 second sound outlet, 126 cover plate, 128 screen assembly, 130 mounting pieces.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of this application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The electronic device 100 provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 3 , an embodiment of the present application proposes an electronic device 100 , including: a device body 102 . The device body 102 includes an installation cavity 104 , a front cavity 106 and a rear cavity 108 , and the front cavity 106 and the rear cavity 108 Located on opposite sides of the installation cavity 104, the installation cavity 104 is respectively connected to the first sound outlet 122 of the front cavity 106 and the second sound outlet 124 of the rear cavity 108; the sound-emitting device 110 is arranged in the installation cavity 104; the muffler The component 114 is arranged in the rear cavity 108 .

It can be understood that, as shown in FIGS. 1 and 3 , the electronic device 100 includes a device body 102 , a sound-emitting device 110 and a sound-absorbing device 114 . The device body 102 includes an installation cavity 104 , a front cavity 106 and a rear cavity 108 , and the front cavity 106 and the rear cavity 108 are located on opposite sides of the installation cavity 104 ; and the installation cavity 104 passes through the first sound outlet of the front cavity 106 122 communicates with the external space, and the installation cavity 104 communicates with the external space through the second sound outlet 124 of the rear cavity 108 .

In addition, as shown in FIGS. 2 and 4 , the sound-emitting device 110 is arranged in the installation cavity 104 , the sound-absorbing device 114 is arranged in the rear cavity 108 , and the sound-absorbing device is located between the sound-emitting device 110 and the second sound outlet 124 . When the sound-generating device 110 works, the sound-absorbing device 114 can drive the airflow in the rear cavity 108 to generate vibration and generate sound waves.

Further, as shown in FIG. 1 and FIG. 3 , when the sound-generating device 110 works, the air in the front cavity 106 and the rear cavity 108 is simultaneously driven to vibrate. Therefore, when the sound-emitting device 110 is working, the sound-emitting device 110 can generate the first sound wave in the front cavity 106; at the same time, the vibration of the air in the rear cavity 108 can cause the sound-absorbing device 114 to vibrate, thereby causing the sound-absorbing device 114 to generate the first sound wave. Two sound waves. In particular, since the front cavity 106 and the rear cavity 108 are located on opposite sides of the sound generating device 110 , the phase of the second sound wave is opposite to that of the first sound wave. In this way, in the total sound field of the electronic device 100 , the second sound wave generated by the sound-absorbing device 114 can be used to cancel at least part of the first sound wave, thereby reducing the sound wave leakage when the sound-emitting device 110 is working.

Further, as shown in FIG. 2 and FIG. 4 , the electronic device 100 proposed in the embodiment of the present application is additionally provided with a noise reduction device 114 in the rear cavity 108 , and the second sound wave generated by the noise reduction device 114 is used to cancel the sound emission device 110 in the rear cavity 108 . At least a portion of the first acoustic wave generated in the front cavity 106 . In addition, the frequency of the second sound wave generated by the muffler device 114 can be adjusted, so that the second sound wave and at least a part of the first sound wave can be superimposed and canceled in different frequency bands, so that the electronic device 100 can reduce the specific noise in a more targeted manner. Frequency band leakage.

Specifically, as shown in FIG. 8 , in the embodiment of the present application, a noise reduction device 114 is added in the rear cavity 108 , which can effectively reduce the volume of the call sound in the low frequency band (<600 Hz). And the main frequency range of daily speech is 300Hz to 500Hz. According to the simulation results, the leakage sound volume in this frequency band can be reduced by more than 10dB, which can play a significant anti-leakage effect. Specifically, the line L1 in FIG. 8 represents the relationship between the frequency range and the sound volume in the related art, the line L2 in FIG. 8 represents the relationship between the frequency range and the sound volume in the electronic device 100 of the embodiment of the present application, and the abscissa in FIG. 8 represents the total sound field. The vibration frequency (unit is Hz), the ordinate in Fig. 8 represents the loudness (unit is db) of the total sound field, and the octave band in Fig. 8: pext(0,1,0)(pa).

Specifically, as shown in FIG. 1 and FIG. 3 , the structural dimensions of the muffler device 114 and the structural dimensions of the front cavity 106 and the rear cavity 108 can be set according to the actual size of the electronic device 100; The structural dimensions of the cavity 106 and the rear cavity 108 are used to achieve the optimal noise reduction effect and ensure the minimum sound wave leakage.

In some possible implementations, as shown in FIG. 1 and FIG. 3 , the sound-generating device 110 includes a vibration source 112 ; in the vibration direction of the vibration source 112 , the front cavity 106 and the rear cavity 108 are located on opposite sides of the vibration source 112 .

It can be understood that the sound generating device 110 includes a vibration source 112 . Wherein, when the sound generating device 110 is working, the vibration source 112 can vibrate back and forth, and cause the gas in the front cavity 106 and the rear cavity 108 to vibrate. In addition, in the vibration direction of the vibration source 112 , the front cavity 106 and the rear cavity 108 are located on opposite sides of the vibration source 112 . In this way, the vibration source 112 can drive the airflow to vibrate in the front cavity 106 and the rear cavity 108 respectively, so that the phase of the second sound wave generated by the muffler device 114 is opposite to the phase of the first sound wave generated by the vibration source 112 in the front cavity 106, so that The second sound wave generated by the muffler device 114 can be used to superimpose and cancel the first sound wave generated by the vibration source 112 in the front cavity 106, so as to achieve the purpose of reducing sound wave leakage.

In some possible implementations, as shown in FIGS. 1 and 3 , the muffling device 114 seals the rear cavity 108 .

It can be understood that the muffler device 114 is disposed in the rear cavity 108 and is in contact with the inner wall of the rear cavity 108 , thereby sealing the rear cavity 108 . In particular, in the embodiment of the present application, the rear cavity 108 is sealed by the sound-absorbing device 114 , so as to isolate the sound-emitting device 110 inside the installation cavity 104 from the external environment of the electronic device 100 .

In this way, during the use of the electronic device 100, external water vapor or impurities can enter the interior of the electronic device 100 through the rear cavity 108, and in particular, external water vapor or impurities can be prevented from entering the installation cavity 104 through the rear cavity 108, so as to ensure the installation cavity The use of the sound emitting device 110 within 104 is safe.

Specifically, in the related art, the rear cavity is open, which directly leads to the communication between the inside of the electronic device and the external environment, and external water vapor or impurities easily enter the interior of the electronic device, reducing the service life of the electronic device. In the embodiment of the present application, the interior of the electronic device 100 is effectively isolated from the external environment by the muffler device 114 , thereby preventing external water vapor or impurities from entering the installation cavity 104 through the rear cavity 108 , which is beneficial for extending the service life of the electronic device 100 . Obvious help.

Therefore, in the electronic device 100 proposed in the embodiment of the present application, the noise reduction device 114 can be used not only to improve and alleviate the sound wave leakage of the electronic device 100 , but also to prolong the service life of the electronic device 100 .

In some possible implementations, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the muffling device 114 includes: a diaphragm 116 , which is arranged in the rear cavity 108 and can vibrate under the action of the sound generating device 110 .

It can be understood that the muffling device 114 includes a diaphragm 116 . The diaphragm 116 is disposed in the rear cavity 108 and can vibrate under the impetus of the vibrating airflow in the rear cavity 108, thereby generating a first sound wave for canceling at least part of the first sound wave. In addition, the diaphragm 116 is in contact with the inner wall of the rear cavity 108, and ensures that there is no gap between the diaphragm 116 and the inner wall of the rear cavity 108, thereby sealing the rear cavity 108 to prevent external water vapor or impurities from entering the electronic Inside of device 100 .

Specifically, the diaphragm 116 of the muffler device 114 is a passive diaphragm. Specifically, the material and thickness of the diaphragm 116 of the muffler device 114 are determined according to the resonant frequency of the second sound wave and at least a part of the first sound wave, and can be selected (but not limited to) silicone film, composite film, rubber film, foam film, etc. .

Specifically, the diaphragm 116 of the muffler device 114 is integrally connected with the inner wall of the rear cavity 108 . Wherein, the diaphragm 116 may be integrally bonded to the inner wall of the rear cavity 108 by means of glue, hot melt or injection molding.

In some possible implementations, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the muffling device 114 further includes: a counterweight 118 , which is arranged on the diaphragm 116 and is used to adjust the vibration frequency of the diaphragm 116 .

It can be understood that the muffling device 114 also includes a counterweight 118 . The counterweight 118 is disposed on the diaphragm 116 and can vibrate with the diaphragm 116 . In particular, the weight of the counterweight 118 is greater than the weight of the diaphragm 116 , and the vibration frequency of the diaphragm 116 is adjusted by the counterweight 118 .

Wherein, the larger the mass of the counterweight 118, the lower the vibration frequency of the diaphragm 116, and the lower the resonance frequency of the second sound wave and at least a part of the first sound wave; the smaller the mass of the counterweight 118, the lower the diaphragm 116. The higher the vibration frequency of 116 is, the higher the resonance frequency range of the second sound wave and at least a part of the first sound wave is.

Therefore, in the embodiment of the present application, a weight member 118 is provided on the diaphragm 116, and the weight member 118 is used to adjust the vibration frequency of the diaphragm 116, thereby adjusting the resonance frequency range of the second sound wave and at least a part of the first sound wave. In this way, the embodiments of the present application can cause the second sound wave to resonate with at least a part of the first sound wave in a specific frequency range, thereby improving the sound leakage phenomenon in the specific frequency range.

In particular, in the related art, the homologous sound is used to cancel each other (that is, the first sound wave and the second sound wave generated by the same vibration source cancel each other), and the resonance frequency range of the homologous sound cannot be adjusted. In this embodiment of the present application, the second sound wave generated by the sound-absorbing device 114 is used to cancel at least a part of the first sound wave generated by the vibration source 112 of the sound-generating device 110 in the front cavity 106 , and the first sound wave and the second sound wave are different. source sound (the first sound wave comes from the sound-generating device 110, and the second sound wave comes from the sound-absorbing device 114); and the frequency of the second sound wave can be adjusted by the counterweight 118, so that the second sound wave can be used to cancel a specific frequency The first sound wave in the section is adjusted, and the resonance frequency section of the second sound wave and at least a part of the first sound wave is adjusted, and the sound leakage phenomenon is improved in a specific frequency section.

Specifically, as shown in FIG. 1 and FIG. 3 , the counterweight 118 can be a mass block, and the mass block can be controlled by different materials.

Specifically, as shown in FIG. 1 and FIG. 3 , the weight member 118 is integrally connected with the diaphragm 116 . Specifically, the weight member 118 and the diaphragm 116 may be bonded into one body by means of glue, hot melt or injection molding.

In some possible implementations, the weights 118 are disposed on the sides of the diaphragm 116 .

It can be understood that, as shown in FIG. 1 and FIG. 3 , the counterweight 118 is disposed on the side of the diaphragm 116 . Wherein, the counterweight 118 can be arranged on one side of the diaphragm 116, and specifically on the side of the diaphragm 116 facing the sound-emitting device 110, or the counterweight 118 can be arranged on the side of the diaphragm 116 away from the sound-emitting device 110 ( This case is not shown in the figure). In addition, the counterweights 118 may also be disposed on both sides of the diaphragm 116 .

In some possible implementations, as shown in FIGS. 1 and 3 , the weight member 118 is located in the middle of the diaphragm 116 .

It can be understood that the weight member 118 is located in the middle of the diaphragm 116 . In this way, the counterweight 118 adjusts the vibration frequency of the diaphragm 116 at the center of the diaphragm 116 . In addition, the parallel weight member 118 is arranged at the center of the diaphragm 116 to distribute the weight of the diaphragm 116 evenly in the circumferential direction of the diaphragm 116 to avoid the phenomenon of polarization during the vibration of the diaphragm 116 .

In some possible implementations, the first sound outlet 122 and the second sound outlet 124 are located on different end faces of the device body 102 .

It can be understood that the front cavity 106 and the rear cavity 108 are located on opposite sides of the installation cavity 104, and the first sound outlet 122 and the second sound outlet 124 are located on different end faces of the device body 102. The first sound outlet 122 The second sound outlet 124 is arranged on the back end surface of the device body 102 . In this way, the first sound outlet 122 can be used as a front sound outlet of the electronic device 100 , and the second sound outlet 124 can be used as a rear sound outlet of the electronic device 100 .

In some possible implementations, as shown in FIGS. 2 and 4 , the device body 102 further includes a bracket 120 , the rear cavity 108 is disposed on the bracket 120 , and the muffler device 114 is connected to the bracket 120 .

It can be understood that the device body 102 further includes a bracket 120 . The bracket 120 is disposed inside the electronic device 100, and the bracket 120 is used to install related components such as a circuit board. In addition, the above-mentioned rear cavity 108 is provided on the bracket 120 , and the muffler device 114 is arranged on the bracket 120 , thereby ensuring the stable connection of the muffler device 114 inside the electronic device 100 .

In some possible implementations, as shown in FIG. 1 and FIG. 3 , the diaphragm 116 and the bracket 120 are integral structures.

It can be understood that the muffler device 114 and the bracket 120 are integral structures. Specifically, the vibrating membrane 116 of the muffler device 114 and the bracket 120 have a one-piece structure. In this way, on the one hand, it can ensure the stable connection of the muffler device 114 on the bracket 120, and on the other hand, it can ensure that there is a gap in the connection between the diaphragm 116 and the bracket 120, so that the muffler device 114 can seal the rear cavity 108, thereby avoiding external water vapor Or impurities enter into the installation cavity 104 through the rear cavity 108 to ensure the safe use of the sound-emitting device 110 in the installation cavity 104 .

Specifically, the diaphragm 116 and the bracket 120 may be assembled into one body by means of adhesive, injection molding, or the like. The bracket 120 fits inside the electronic device 100, and the front cavity 106 and the rear cavity 108 are isolated.

In some possible implementations, as shown in FIGS. 1 and 3 , the device body 102 further includes a cover plate 126 and a screen assembly 128 ; the second sound outlet 124 is provided on the cover plate 126 , the front cavity 106 and the first outlet The sound port 122 is provided on the screen assembly 128 .

It can be understood that the device body 102 further includes a cover plate 126 and a screen assembly 128 . The screen assembly 128 is disposed on the front surface of the electronic device 100, and the cover plate 126 is disposed on the rear surface of the electronic device 100, and can be used as a battery back cover. In addition, the aforementioned front cavity 106 and the first sound outlet 122 are arranged on the screen assembly 128 , and the aforementioned second sound outlet 124 is arranged on the cover plate 126 .

In some possible implementations, as shown in FIG. 2 and FIG. 5 , the number of the second sound outlet 124 is one.

It can be understood that the number of the second sound outlet 124 may be set to one. At this time, the second sound outlet 124 is communicated with the rear sound cavity of the sound generating device 110 through the rear cavity 108 . In addition, the shape and opening area of the second sound outlet 124 can be designed according to actual needs. For example, the second sound outlet 124 may be a bar-shaped port or a circular port.

In some possible implementations, as shown in FIGS. 4 , 6 and 7 , the number of the second sound outlets 124 is at least two, and the at least two second sound outlets 124 communicate with the rear cavity 108 at the same time.

It can be understood that the number of the second sound outlets 124 can be set to at least two. At this time, the at least two second sound outlets 124 communicate with the rear sound cavity of the sound producing device 110 through the rear cavity 108 at the same time. In addition, the shape and opening area of the second sound outlet 124 can be designed according to actual needs. For example, the second sound outlet 124 may be a bar-shaped port or a circular port.

Specifically, in the case where one second sound outlet 124 is provided, the opening area of the second sound outlet 124 may be relatively large; in the case where at least two second sound outlets 124 are provided, the opening area of the second sound outlet 124 may be relatively large; The opening area of the second sound outlet 124 is relatively small.

Specifically, in the case where at least two second sound outlets 124 are provided, the at least two second sound outlets 124 are distributed at intervals, and may be distributed in the width direction of the electronic device 100, or may be in the electronic device 100 distributed in the length direction.

In some possible implementations, as shown in FIGS. 1 and 3 , the sounding device 110 is in contact with the inner wall of the mounting cavity 104 , and the front cavity 106 and the rear cavity 108 are separated by the sounding device 110 .

It can be understood that the sounding device 110 is in contact with the inner wall of the mounting cavity 104 , so that the front cavity 106 and the rear cavity 108 are separated by the sounding device 110 . That is, the front cavity 106 and the rear cavity 108 are located on opposite sides of the sound generating device 110 , and the front cavity 106 and the rear cavity 108 are not in communication. In this way, the first sound wave generated by the front sound cavity of the sound generating device 110 enters the front cavity 106 , and the muffler device 114 vibrates under the action of the airflow in the rear cavity 108 to generate the second sound wave, thereby ensuring that the second sound wave is compatible with the first sound wave. The waves are reversed in phase so that the second sound wave can be used to cancel at least a portion of the first sound wave.

In some possible implementations, as shown in FIGS. 2 and 4 , the sound generating device 110 may employ a receiver. The specific structure of the receiver will not be discussed here, which can be understood by those skilled in the art.

In some possible implementations, the vibration source 112 of the sound-generating device 110 includes a vibrating membrane and a driving member, and the driving member can drive the vibrating membrane to vibrate. In addition, the drive member may use a dome. The vibrating membrane is located on the side of the driving element facing the front cavity 106 .

In addition, as shown in FIG. 1 and FIG. 3 , the sounding device 110 further includes a mounting member 130 , and the mounting member 130 is arranged on the bracket 120 and is located in the mounting cavity 104 . Wherein, the mounting member 130 is sealedly connected with the bracket 120 to ensure that the front cavity 106 and the rear cavity 108 are not connected.

With the advent of the era of mobile intelligence, electronic devices such as mobile phones, as important intelligent communication tools, undertake the task of daily external communication. Sound devices such as receivers in electronic equipment play the role of transmitting call information. When the sound-emitting device is working, part of the sound wave is transmitted to the human ear, and part of the sound wave is transmitted to the external space. In the evaluation of the communication effect of the sound-emitting device, preventing the leakage of sound waves and keeping the communication content confidential are important contents that consumers pay attention to.

As shown in FIG. 1 and FIG. 3 , the present application proposes an electronic device 100 . A muffler device 114 is provided in the rear cavity 108 of the electronic device 100 , and the muffler device 114 includes components such as a diaphragm 116 and a counterweight 118 . When the sound generating device 110 is in operation, the vibrating airflow in the rear cavity 108 can cause the noise cancellation device 114 to vibrate, so that the noise cancellation device 114 generates a second sound wave, and the phase of the second sound wave is opposite to that of the first sound wave, so that the second sound wave The user can cancel a part of the first sound wave to achieve the effect of active noise reduction.

Further, as shown in FIG. 1 and FIG. 3 , the present application ensures the sealing of the electronic device 100 through the integrated molding of the muffler device 114 and the bracket 120 of the electronic device 100 while realizing anti-leakage of calls. Further, by adjusting the compliance of the diaphragm 116, the density and damping of the counterweight 118, etc., the solution design of the process can be made more controllable.

Therefore, as shown in FIG. 1 and FIG. 3 , the present application can reduce the sound wave leakage during operation of the sound generating device 110 , ensure the sealing of the electronic device 100 , and protect the related components inside the electronic device 100 . In addition, the muffling device 114 is adjustable and can be adjusted according to actual needs and the sound-emitting device 110 . Moreover, the present application has lower requirements on the rear sound cavity of the sound-emitting device 110 , which is beneficial to the stacking design of the electronic device 100 .

Specifically, as shown in FIGS. 5 , 6 and 7 , from the front of the electronic device 100 to the back of the electronic device 100 , the electronic device 100 proposed in this embodiment of the present application includes a screen assembly 128 , a first sound outlet 122 , a front The cavity 106 , the sound-emitting device 110 , the sound-emitting device 110 , the rear cavity 108 , the noise-absorbing device 114 , the bracket 120 , the cover plate 126 , the second sound outlet 124 and other components.

Specifically, in the electronic device 100 shown in FIG. 5 , the number of the second sound outlet 124 is one; in the electronic device 100 shown in FIG. 6 and FIG. 7 , the number of the second sound outlet 124 is two .

Specifically, in the electronic device 100 shown in FIGS. 5 and 6 , the second sound outlet 124 is a bar-shaped mouth; in the electronic device 100 shown in FIG. 7 , the second sound outlet 124 is a circular mouth.

Among them, as shown in FIG. 1 and FIG. 3 , the muffler device 114 includes a diaphragm 116 and a counterweight 118 . The diaphragm 116 and the bracket 120 are integrally formed. The opened second sound outlet 124 emits sound. The counterweight 118 is located in the center of the diaphragm 116 and is bonded to the diaphragm 116 ; the diaphragm 116 and the bracket 120 are integrally formed. In addition, one or more than two second sound outlets 124 may be provided, and the shape of the second sound outlet 124 may be designed according to actual requirements.

As shown in FIGS. 1 and 3 , when the sound-generating device 110 works, the sound-generating device 110 pushes the air in the front cavity 106 and the rear cavity 108 to vibrate, thereby generating a first sound wave in the front cavity 106 and generating a first sound wave in the rear cavity 108 A second sound wave, and the first sound wave is opposite in phase to the second sound wave.

In addition, the airflow in the rear cavity 108 can cause the muffler device 114 to vibrate and generate a second sound wave, and the phase of the second sound wave is opposite to that of the first sound wave. In this way, in the total sound field of the electronic device 100 , the second sound wave generated by the sound-absorbing device 114 can cancel at least part of the first sound wave, resulting in destructive interference in the total sound field, thereby reducing sound leakage during the operation of the sound-emitting device 110 .

Specifically, as shown in FIG. 2 and FIG. 4 , the counterweight 118 and the diaphragm 116 are bonded together by glue, hot melt or injection molding, and the counterweight 118 can be placed on both sides of the diaphragm 116 . In addition, the muffler device 114 and the bracket 120 are assembled together by means of adhesive, injection molding, etc. The bracket 120 is assembled in the whole machine, and it is necessary to ensure that there is no other leakage between the rear sound cavity of the sound emission device 110 and the diaphragm 116 .

In addition, as shown in FIG. 1 and FIG. 3 , the structural design of the front cavity 106 and the rear cavity 108 can be confirmed by means of simulation to determine the most suitable length, width, and height, so as to achieve optimal first and second acoustic waves. Cancellation to ensure that the sound wave leakage is minimized. From the outside, the weights 118 on the diaphragm 116 can control the quality of the diaphragm 116 through different materials, thereby adjusting the vibration frequency of the diaphragm 116, which can facilitate debugging and specifically reduce sound leakage in certain frequency bands.

Specifically, as shown in FIGS. 1 and 3 , the front cavity 106 and the rear cavity 108 are completely isolated. In addition, the position of the weight member 118 is located at the center of the diaphragm 116 to reduce the polarization phenomenon of the muffler device 114 . In addition, the radiating surface outlet of the muffler device 114 is designed to radiate sound waves at the front.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," or the like, is meant to incorporate the embodiment. A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (11)

1. An electronic device, comprising:

the device comprises a device body, a front cavity and a rear cavity, wherein the front cavity and the rear cavity are positioned on two opposite sides of the mounting cavity, and the mounting cavity is respectively communicated with a first sound outlet of the front cavity and a second sound outlet of the rear cavity;

the sounding device is arranged in the mounting cavity;

and the sound eliminating device is arranged in the rear cavity.

2. The electronic device of claim 1,

the sound generating device comprises a vibration source;

in the vibration direction of the vibration source, the front cavity and the rear cavity are positioned on two sides of the vibration source, which are opposite to each other.

3. The electronic device of claim 1,

the muffler element seals the rear cavity.

4. The electronic device of claim 1, wherein the sound attenuating device comprises:

and the vibrating diaphragm is arranged in the rear cavity and can vibrate under the action of the sounding device.

5. The electronic device of claim 4, wherein the sound suppression means further comprises:

and the counterweight is arranged on the vibrating diaphragm and is used for adjusting the vibration frequency of the vibrating diaphragm.

6. The electronic device of claim 5,

the weight member is arranged on the side edge or the middle part of the vibrating diaphragm.

7. The electronic device of any of claims 1-6,

the first sound outlet and the second sound outlet are located on different end faces of the equipment body.

8. The electronic device of any of claims 1-6,

the equipment body further comprises a support, the rear cavity is arranged on the support, and the sound-absorbing device is connected with the support.

9. The electronic device of any of claims 1-6,

the equipment body also comprises a cover plate and a screen assembly;

the second sound outlet is arranged on the cover plate, and the front cavity and the first sound outlet are arranged on the screen assembly.

10. The electronic device of any of claims 1-6,

the number of the second sound outlets is one; or

The number of the second sound outlets is at least two, and the at least two second sound outlets are simultaneously communicated with the rear cavity.

11. The electronic device of any of claims 1-6,

the sounder is in contact with the inner wall of the mounting cavity, and the front cavity and the rear cavity are isolated by the sounder.

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