CN114615592A

CN114615592A - Electronic device

Info

Publication number: CN114615592A
Application number: CN202210235509.9A
Authority: CN
Inventors: 阮清波; 曹惠娴; 李超鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-10
Also published as: WO2023169495A1

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 device

Technical Field

The application relates to the technical field of electronic equipment, in particular to electronic equipment.

Background

In order to reduce the sound wave leakage, the related art designs the rear cavity opening of the sound production device, and utilizes the superposition and cancellation of the sound waves with the front cavity and the rear cavity in opposite phases, thereby reducing the sound wave leakage.

However, the sound waves of the front cavity and the back cavity of the sound generating device utilize the same sound source (both generated by the vibrating membranes of the sound generating device), so that the vibration frequency of the sound waves of the back cavity cannot be adjusted, and further the sound waves of the front cavity and the sound waves of the back cavity can be only superposed and cancelled in a specific frequency range, and further the sound generating effect of the sound generating device is influenced.

Disclosure of Invention

The present application aims to provide an electronic device, which at least solves 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 in the electronic device can only be superposed and cancelled in a specific frequency band.

An embodiment of the present application provides an electronic device, including: 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.

In the present application, the sound producing device is capable of producing a first sound wave in the front cavity; at the same time, the vibrating air in the back cavity can cause the muffler components to vibrate and generate a second sound wave. In particular, the front cavity and the rear cavity are located on two opposite sides of the sound production device, so that the phase of the second sound wave is opposite to that of the first sound wave. Thus, within the overall sound field of the electronic device, the second sound wave generated by the sound attenuating device can be used to cancel at least part of the first sound wave, thereby reducing sound wave leakage during operation of the sound attenuating device.

Moreover, the frequency of the second sound wave generated by the silencer can be adjusted, so that the second sound wave and at least a part of the first sound wave can generate resonance in different frequency bands, and the electronic equipment can reduce the sound leakage of a specific frequency band more specifically.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

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

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

FIG. 2 is one of the partial block diagrams of an electronic device according to the present application;

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

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

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

FIG. 6 is a second exploded view of an electronic device according to the present application;

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

fig. 8 is a comparison graph of sound fields of the electronic device according to the embodiment of the present application and the electronic device in the related art.

Reference numerals in fig. 1 to 7:

100 electronic equipment, 102 equipment body, 104 installation cavity, 106 front cavity, 108 back cavity, 110 sound production device, 112 vibration source, 114 silencer device, 116 diaphragm, 118 weight part, 120 support, 122 first sound outlet, 124 second sound outlet, 126 cover plate, 128 screen component and 130 installation part.

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.

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

As shown in fig. 1 and fig. 3, an embodiment of the present application provides an electronic device 100, including: the device comprises a device body 102, wherein the device body 102 comprises a mounting cavity 104, a front cavity 106 and a rear cavity 108, the front cavity 106 and the rear cavity 108 are positioned on two opposite sides of the mounting cavity 104, and the mounting cavity 104 is respectively communicated with a first sound outlet 122 of the front cavity 106 and a second sound outlet 124 of the rear cavity 108; a sound-producing device 110 disposed in the mounting cavity 104; and an acoustic dampening device 114 disposed within the rear chamber 108.

It will be appreciated that the electronic device 100, as shown in fig. 1 and 3, includes a device body 102, a sound emitting device 110 and a sound attenuating device 114. The equipment body 102 comprises a mounting cavity 104, a front cavity 106 and a rear cavity 108, wherein the front cavity 106 and the rear cavity 108 are positioned on two opposite sides of the mounting cavity 104; the mounting chamber 104 communicates with the external space through a first sound outlet 122 of the front chamber 106, and the mounting chamber 104 communicates with the external space through a second sound outlet 124 of the rear chamber 108.

Further, as shown in fig. 2 and 4, the sound-emitting device 110 is disposed in the mounting cavity 104, and the muffler device 114 is disposed in the rear cavity 108 between the sound-emitting device 110 and the second sound outlet 124. The muffling means 114 is capable of generating vibrations and sound waves driven by the air flow within the rear cavity 108 when the sound generating means 110 is in operation.

Further, as shown in fig. 1 and 3, the sounder device 110 operates to simultaneously urge air within the front and

rear cavities

106, 108 to vibrate. Thus, when the sound device 110 is in operation, the sound device 110 is capable of generating a first sound wave in the front cavity 106; at the same time, the vibrating air vibrations within the rear cavity 108 can cause the muffling apparatus 114 to vibrate, thereby causing the muffling apparatus 114 to generate a second sound wave. In particular, the front cavity 106 and the rear cavity 108 are located on opposite sides of the sound producing device 110 such that the second sound wave is in phase opposition to the first sound wave. Thus, the second acoustic wave generated by the silencer device 114 can be used to cancel at least a portion of the first acoustic wave in the overall acoustic field of the electronic device 100, thereby reducing acoustic wave leakage during operation of the sound generating device 110.

Further, as shown in fig. 2 and 4, the electronic device 100 according to the embodiment of the present application is provided with an acoustic elimination device 114 in the rear cavity 108, and at least a portion of the first sound wave generated by the acoustic elimination device 110 in the front cavity 106 is cancelled by the second sound wave generated by the acoustic elimination device 114. Moreover, the frequency of the second sound wave generated by the silencer element 114 can be adjusted, and the second sound wave and at least a part of the first sound wave can be superposed and offset in different frequency bands, so that the electronic device 100 can reduce the sound leakage in a specific frequency band more specifically.

Specifically, as shown in fig. 8, in the embodiment of the present application, a sound-deadening device 114 is added in the rear cavity 108, so that the volume of the call sound can be effectively reduced in a low frequency band (<600 Hz). And the main frequency band of everyday speech is 300Hz to 500 Hz. According to simulation results, the sound leakage quantity in the frequency band can be reduced by more than 10dB, and a remarkable leakage-proof effect can be achieved. Specifically, a line L1 in fig. 8 represents a relationship between a frequency band and an amount of sound in the related art, a line L2 in fig. 8 represents a relationship between a frequency band and an amount of sound in the electronic apparatus 100 of the embodiment of the present application, an abscissa in fig. 8 represents a vibration frequency (in Hz) of a total sound field, an ordinate in fig. 8 represents a loudness (in db) of the total sound field, and a octave band in fig. 8: pext (0, 1, 0) (pa).

Specifically, as shown in fig. 1 and 3, the structural dimensions of the sound attenuating device 114, and the structural dimensions of the front cavity 106 and the back cavity 108 may be set according to the actual dimensions of the electronic device 100; in addition, the structural dimensions of the front cavity 106 and the rear cavity 108 can be determined by a simulation means, so that the optimal noise elimination effect is realized, and the sound wave leakage is ensured to be minimum.

In some possible embodiments, as shown in fig. 1 and 3, the sound producing device 110 includes a vibration source 112; the front cavity 106 and the back cavity 108 are located on opposite sides of the vibration source 112 in the direction of vibration of the vibration source 112.

It will be appreciated that the sound producing device 110 includes a vibration source 112. Wherein, when the sound generating device 110 is operated, the vibration source 112 can vibrate back and forth and cause the gas in the front chamber 106 and the rear chamber 108 to vibrate. In addition, the front cavity 106 and the rear cavity 108 are located on opposite sides of the vibration source 112 in the vibration direction of the vibration source 112. Thus, the vibration source 112 can drive the airflow to vibrate in the front cavity 106 and the rear cavity 108, so that the phase of the second sound wave generated by the sound eliminator 114 is opposite to the phase of the first sound wave generated by the vibration source 112 in the front cavity 106, and the second sound wave generated by the sound eliminator 114 can be used for being superposed and offset with the first sound wave generated by the vibration source 112 in the front cavity 106, thereby achieving the purpose of reducing sound wave leakage.

In some possible embodiments, the sound attenuating device 114 seals the rear cavity 108, as shown in fig. 1 and 3.

It will be appreciated that the muffler elements 114 are disposed within the rear cavity 108 and contact the inner walls of the rear cavity 108, thereby sealing the rear cavity 108. In particular, embodiments of the present application seal the rear cavity 108 with the sound suppression device 114, thereby isolating the sound production device 110 inside the mounting cavity 104 from the environment outside the electronic device 100.

In this way, during the use of the electronic device 100, external moisture or impurities can enter the inside of the electronic device 100 through the rear cavity 108, and particularly, the external moisture or impurities can be prevented from entering the mounting cavity 104 through the rear cavity 108, so as to ensure the safe use of the sound generating device 110 in the mounting cavity 104.

Particularly, the rear cavity in the related art is opened, so that the inside of the electronic equipment is directly communicated with the external environment, external water vapor or impurities easily enter the inside of the electronic equipment, and the service life of the electronic equipment is shortened. In the embodiment of the present application, the sound-absorbing device 114 effectively isolates the inside of the electronic device 100 from the external environment, so as to prevent external moisture or impurities from entering the installation cavity 104 through the rear cavity 108, which is of significant help for extending the service life of the electronic device 100.

Therefore, in the electronic device 100 according to the embodiment of the present application, the silencer component 114 can be used to improve and alleviate the sound wave leakage of the electronic device 100, and can also be used to prolong the service life of the electronic device 100.

In some possible embodiments, as shown in fig. 1, 2, 3 and 4, the silencer component 114 includes: and the vibrating diaphragm 116 is arranged in the rear cavity 108 and can vibrate under the action of the sounding device 110.

As can be appreciated, the silencer component 114 includes a diaphragm 116. Wherein the diaphragm 116 is disposed in the rear cavity 108 and is capable of vibrating under the urging 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 contacts with the inner wall of the rear cavity 108, and it is ensured that no gap exists between the diaphragm 116 and the inner wall of the rear cavity 108, so as to seal the rear cavity 108 and prevent external moisture or impurities from entering the inside of the electronic device 100.

In particular, the diaphragm 116 of the silencer component 114 is a passive diaphragm. Specifically, the material and thickness of the diaphragm 116 of the silencer component 114 are determined according to the resonant frequency of the second sound wave and at least a portion of the first sound wave, and may be (but are not limited to) a silicone film, a composite film, a rubber film, a foam film, and the like.

Specifically, the diaphragm 116 of the silencer component 114 is integrally connected to the inner wall of the back chamber 108. The diaphragm 116 may be bonded to the inner wall of the rear cavity 108 by glue, hot melting, or injection molding.

In some possible embodiments, as shown in fig. 1, 2, 3, and 4, the silencer component 114 further includes: and a weight 118 disposed on the diaphragm 116 for adjusting the vibration frequency of the diaphragm 116.

It will be appreciated that the muffler component 114 also includes a counterweight 118. Wherein the weight member 118 is disposed on the diaphragm 116 and is capable of vibrating with the diaphragm 116. In particular, the weight of the weight member 118 is greater than the weight of the diaphragm 116, and the vibration frequency of the diaphragm 116 is adjusted by the weight member 118.

Wherein, the larger the mass of the weight member 118, the lower the vibration frequency of the diaphragm 116, and the lower the resonance frequency band of the second sound wave and at least a part of the first sound wave; the smaller the mass of the weight member 118, the higher the vibration frequency of the diaphragm 116, and the higher the resonance frequency band of the second sound wave and at least a part of the first sound wave.

Therefore, in the embodiment of the present application, the weight member 118 is disposed on the diaphragm 116, and the vibration frequency of the diaphragm 116 is adjusted by the weight member 118, so as to adjust the resonant frequency band of the second sound wave and at least a part of the first sound wave. Therefore, the second sound wave and at least one part of the first sound wave can resonate in a specific frequency band, and the sound leakage phenomenon is improved in the specific frequency band.

In particular, in the related art, the resonant frequency bands of the homologous sounds cannot be adjusted by using the homologous sounds to cancel each other (i.e., the first sound wave and the second sound wave generated by using the same vibration source to cancel each other). The present embodiment utilizes the second sound wave generated by the sound-deadening device 114 to cancel at least a portion of the first sound wave generated by the vibration source 112 of the sound-generating device 110 in the front cavity 106, where the first sound wave and the second sound wave are non-homologous sound (the first sound wave is from the sound-generating device 110, and the second sound wave is from the sound-deadening device 114); and, the frequency of the second sound wave can be adjusted by the weight 118, so that the second sound wave can be used for offsetting the first sound wave in a specific frequency band, thereby adjusting the resonance frequency band of the second sound wave and at least one part of the first sound wave and improving the sound leakage phenomenon in the specific frequency band.

Specifically, as shown in fig. 1 and 3, the weight 118 may be a mass, which may be mass controlled by different materials.

Specifically, as shown in fig. 1 and 3, the weight member 118 is integrally connected to the diaphragm 116. Specifically, the weight 118 and the diaphragm 116 may be bonded together by glue, hot melting, or injection molding.

In some possible embodiments, the weight 118 is disposed at a side of the diaphragm 116.

It will be appreciated that, as shown in fig. 1 and 3, the weight member 118 is disposed at a side edge of the diaphragm 116. The weight 118 may be disposed on a side of the diaphragm 116, and particularly on a side of the diaphragm 116 facing the sound generator 110, or the weight 118 may be disposed on a side of the diaphragm 116 facing away from the sound generator 110 (this is not shown). In addition, a weight member 118 may also be provided on both sides of the diaphragm 116.

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

It will be appreciated that the weight 118 is located in the middle of the diaphragm 116. In this way, the weight 118 is caused to adjust the vibration frequency of the diaphragm 116 at the center of the diaphragm 116. And, the weight member 118 is disposed at the center of the diaphragm 116, so that the weight distribution of the diaphragm 116 is averaged in the circumferential direction of the diaphragm 116, thereby preventing the polarization phenomenon from occurring during the vibration of the diaphragm 116.

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

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

In some possible embodiments, as shown in fig. 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 component 114 is coupled to the bracket 120.

It will be appreciated that the device body 102 also includes a cradle 120. The bracket 120 is disposed inside the electronic device 100, and the bracket 120 is used for mounting related components such as a circuit board. In addition, the rear cavity 108 is disposed on the support 120, and the sound-absorbing device 114 is disposed on the support 120, so as to ensure the sound-absorbing device 114 is stably connected inside the electronic device 100.

In some possible embodiments, as shown in fig. 1 and 3, the diaphragm 116 and the support 120 are of a unitary structure.

It will be appreciated that the muffling apparatus 114 is a unitary structure with the support 120. Specifically, the diaphragm 116 of the silencer component 114 is of unitary construction with the support 120. Like this, on the one hand can guarantee the stable connection of noise suppressor 114 on support 120, on the other hand can guarantee vibrating diaphragm 116 and support 120's junction and exist the gap, and then make noise suppressor 114 can seal back chamber 108, and then avoid outside steam or impurity to enter into installation cavity 104 through back chamber 108 in to guarantee the safe in utilization of sound generating device 110 in installation cavity 104.

Specifically, the diaphragm 116 and the bracket 120 may be assembled into a whole by using an adhesive, injection molding, or the like. The cradle 120 fits inside the electronic device 100 and the front cavity 106 and the back cavity 108 are isolated.

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

It will be appreciated that the device body 102 also 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 rear cover. In addition, the front chamber 106 and the first sound outlet 122 are disposed on the screen assembly 128, and the second sound outlet 124 is disposed on the cover plate 126.

In some possible embodiments, as shown in fig. 2 and 5, the number of second sound outlets 124 is one.

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

In some possible embodiments, as shown in fig. 4, 6 and 7, the number of the second sound outlets 124 is at least two, and at least two second sound outlets 124 are simultaneously communicated with the rear cavity 108.

It is understood that the number of the second sound outlet 124 may be set to at least two. At this time, the at least two second sound outlets 124 are simultaneously communicated with the rear sound cavity of the sound generating device 110 through the rear cavity 108. In addition, the shape and the opening area of the second sound outlet 124 can be designed according to actual needs. For example, second sound outlet 124 may be a strip-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 set relatively large; in the case where at least two second sound outlets 124 are provided, the opening area of the second sound outlets 124 may be set 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 apparatus 100 or may be distributed in the length direction of the electronic apparatus 100.

In some possible embodiments, as shown in fig. 1 and 3, the sounder 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 isolated by the sounder device 110.

It will be appreciated that the sounder element 110 is in contact with the inner wall of the mounting cavity 104 such that the front cavity 106 and the rear cavity 108 are separated by the sounder element 110. That is, the front cavity 106 and the rear cavity 108 are located on opposite sides of the sounder device 110, and the front cavity 106 is not in communication with the rear cavity 108. Thus, the first sound wave generated by the front cavity of the sound generating device 110 enters the front cavity 106, and the silencer device 114 vibrates under the action of the airflow in the rear cavity 108 and generates a second sound wave, thereby ensuring that the second sound wave is in phase opposition to the first sound wave, so that the second sound wave can be used to cancel at least a portion of the first sound wave.

In some possible embodiments, as shown in fig. 2 and 4, the sound generating device 110 may employ a receiver. The specific structure of the receiver is not discussed herein, and can be understood by those skilled in the art.

In some possible embodiments, the vibration source 112 of the sound generating device 110 includes a diaphragm and a driver, and the driver is capable of driving the diaphragm to generate vibration. In addition, the driving member may adopt a ball top. The diaphragm is located on the side of the driver facing the front cavity 106.

In addition, as shown in fig. 1 and 3, the sound production device 110 further includes a mounting member 130, and the mounting member 130 is disposed on the bracket 120 and located in the mounting cavity 104. Wherein mounting member 130 is sealingly coupled to frame 120 to ensure that anterior chamber 106 and posterior chamber 108 are not in communication.

With the advent of the mobile intelligent era, electronic devices such as mobile phones and the like are used as important intelligent communication tools to undertake the task of communication with the outside every day. A sound production device such as a receiver in the electronic equipment plays a role in transmitting call information. When the sound generating device works, a part of sound waves are transmitted to human ears, and a part of sound waves are transmitted to the external space. In the evaluation of the communication effect of the sounding device, sound wave leakage is prevented, and the confidentiality of communication contents is important content concerned by consumers.

As shown in fig. 1 and 3, the present application provides an electronic device 100, wherein a sound-deadening device 114 is disposed in a rear cavity 108 of the electronic device 100, and the sound-deadening device 114 includes a diaphragm 116, a weight 118, and the like. When the sound device 110 is in operation, the vibrating airflow in the rear cavity 108 can cause the sound suppression device 114 to vibrate, so that the sound suppression device 114 generates a second sound wave, and the phase of the second sound wave is opposite to the phase of the first sound wave, so that the second sound wave can enable a user to cancel a part of the first sound wave, and the active noise reduction effect is achieved.

Further, as shown in fig. 1 and fig. 3, while call leakage prevention is achieved, the sound-absorbing device 114 and the bracket 120 of the electronic device 100 are integrally molded, so that the sealing performance of the electronic device 100 is ensured. Further, the design of the process can be made more controllable by adjusting the compliance of the diaphragm 116, the density of the weight 118, the damping, etc.

Therefore, as shown in fig. 1 and fig. 3, the present application can reduce the sound wave leakage when the sound generating device 110 operates, and ensure the sealing performance of the electronic device 100, protecting the relevant components inside the electronic device 100. In addition, the silencer component 114 is adjustable, and can be adjusted according to actual needs and the sound production component 110. Moreover, the requirement on the rear sound cavity of the sound production device 110 is low, and the stacking design of the electronic device 100 is facilitated.

Specifically, as shown in fig. 5, 6 and 7, the electronic device 100 according to the embodiment of the present disclosure includes a screen assembly 128, a first sound outlet 122, a front cavity 106, a sound generating device 110, a rear cavity 108, a sound deadening device 114, a bracket 120, a cover plate 126, and a second sound outlet 124 from a front surface of the electronic device 100 to a rear surface of the electronic device 100.

Specifically, in the electronic apparatus 100 shown in fig. 5, the number of the second sound outlets 124 is one; in the electronic apparatus 100 shown in fig. 6 and 7, the number of the second sound outlets 124 is two.

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

As shown in fig. 1 and fig. 3, the sound-deadening device 114 includes a vibrating diaphragm 116 and a weight member 118, the vibrating diaphragm 116 and the support 120 are of an integral structure, the vibrating diaphragm 116 faces the back of the sound-producing device 110, and sound is produced through a second sound outlet 124 formed in the cover plate 126. The weight member 118 is located at the center of the diaphragm 116 and is bonded to the diaphragm 116; diaphragm 116 is integrally molded with support 120. 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 fig. 1 and 3, when the sound generating device 110 is operated, the sound generating device 110 pushes air in the front cavity 106 and the rear cavity 108 to vibrate, so that a first sound wave is generated in the front cavity 106, a second sound wave is generated in the rear cavity 108, and the phase of the first sound wave is opposite to that of the second sound wave.

Further, the airflow within the rear cavity 108 can cause the muffling device 114 to vibrate and generate a second sound wave, and the phase of the second sound wave is opposite to the phase of the first sound wave. Thus, the second acoustic wave generated by the silencer device 114 can cancel at least a portion of the first acoustic wave in the overall acoustic field of the electronic device 100, resulting in destructive interference in the overall acoustic field, thereby reducing acoustic leakage during operation of the sound generating device 110.

Specifically, as shown in fig. 2 and 4, the weight 118 and the diaphragm 116 are bonded together by glue, hot melting, or injection molding, and the weight 118 may be disposed on both sides of the diaphragm 116. In addition, the sound deadening device 114 and the bracket 120 are assembled into a whole by means of adhesive, injection molding, etc., and the bracket 120 is assembled in the whole machine, it is necessary to ensure that there is no other leakage between the back sound cavity of the sound generating 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 determined by simulation means to have the most suitable dimensions of length, width, height, etc. for realizing the optimal cancellation of the first sound wave and the second sound wave and ensuring that the sound wave leakage is minimized. In addition, the weight member 118 on the diaphragm 116 can control the mass through different materials, so as to adjust the vibration frequency of the diaphragm 116, which is beneficial to debugging and purposefully reduce the leakage sound of certain frequency bands.

Specifically, as shown in fig. 1 and 3, the front chamber 106 and the rear chamber 108 are completely isolated. In addition, the weight 118 is located at the center of the diaphragm 116 to reduce the polarization of the muffling apparatus 114. Furthermore, the radiation-side outlet of the silencer element 114 is designed to radiate sound waves from the front.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above 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.

While 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 to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

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.