Electronic device

Abstract

The present application belongs to the technical field of communications. Disclosed is an electronic device. The electronic device comprises a loudspeaker and a housing, the housing being provided with a first opening and a second opening. The loudspeaker comprises a body, a sound production unit, a first sound outlet channel and a second sound outlet channel, the sound production unit being located in the body. A diaphragm of the sound production unit divides the space in the body into a front cavity and a rear cavity; the first sound outlet channel is separately communicated with the front cavity and the first opening, such that sound waves of the sound production unit in the front cavity are transmitted to the first opening of the housing through the first sound outlet channel to be output; and the second sound output channel is separately communicated with the rear cavity and the second opening, such that sound waves of the sound production unit in the rear cavity are transmitted to the second opening of the housing through the second sound outlet channel to be output.

Description

electronic devices

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 15, 2023, with application number 202310716427.0 and title “Electronic Device”. The entire contents of this application are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to an electronic device. Background Art

[0004] With the development of electronic devices, users have increasingly demanded higher functionality and appearance. This has led to a shrinking of the space required to stack the speakers responsible for sound production, resulting in a smaller sound cavity. Due to the concentrated functionality of electronic devices and the close arrangement of components in various modules, the heat generated by the speakers cannot be dissipated quickly. This heat accumulates and transfers to the battery cover, heating it up. This not only increases the temperature of the electronic device casing but also damages the components.

[0005] Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide an electronic device that can solve the problem caused by low heat dissipation efficiency of a speaker cavity.

[0007] In a first aspect, an embodiment of the present application provides an electronic device, comprising a speaker and a shell, wherein the shell is provided with a first opening and a second opening; the speaker comprises a body, a sound-emitting unit, a first sound outlet channel, and a second sound outlet channel; the sound-emitting unit is located in the body, and the diaphragm of the sound-emitting unit separates the space of the body into a front cavity and a rear cavity, and the first sound outlet channel is respectively connected to the front cavity and the first opening, so that the sound waves of the sound-emitting unit in the front cavity are emitted after being transmitted to the first opening of the shell through the first sound outlet channel; the second sound outlet channel is respectively connected to the rear cavity and the second opening, so that the sound waves of the sound-emitting unit in the rear cavity are emitted after being transmitted to the second opening of the shell through the second sound outlet channel.

[0008] In an embodiment of the present application, an electronic device includes a speaker and a shell, and a first opening and a second opening are provided on the shell; the speaker includes a body, a sound-emitting unit, a first sound output channel, and a second sound output channel; the sound-emitting unit is located in the body, and the diaphragm of the sound-emitting unit divides the space of the body into a front cavity and a rear cavity, and the first sound output channel is connected to the front cavity and the first opening respectively, so that the sound waves of the sound-emitting unit in the front cavity are emitted after being transmitted to the first opening of the shell through the first sound output channel; the second sound output channel is connected to the rear cavity and the second opening respectively, so that the sound waves of the sound-emitting unit in the rear cavity are emitted after being transmitted to the second opening of the shell through the second sound output channel, thereby forming a forced heat dissipation channel in the rear cavity of the speaker, so that the heat energy of the rear cavity is heat-exchanged with the outside world through this forced heat dissipation channel, so that the heat emitted by the speaker can be quickly dissipated, thereby improving the heat dissipation efficiency of the speaker, overcoming the problem of excessive temperature rise caused by slow heat dissipation of the speaker, and reducing damage to the components of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application.

[0010] FIG2 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0011] FIG3 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0012] FIG4 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application.

[0013] FIG5 is a flow diagram of each sound output channel of an electronic device according to an embodiment of the present application.

[0014] FIG6 is a schematic diagram showing the bass performance of a speaker of an electronic device.

[0015] FIG7 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

[0016] FIG8 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

[0017] FIG. 9 is a partially enlarged view of area A in the electronic device of the embodiment of FIG. 8 .

[0018] FIG10 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

[0019] FIG. 11 is a partially enlarged view of area B in the electronic device of the embodiment of FIG. 10 . DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0021] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0022] The electronic device provided in the embodiments of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0023] 1 and 2 , the electronic device includes a speaker and a shell 10, the shell 10 being provided with a first opening 11 and a second opening 12; the speaker includes a body, a sound-emitting unit 23, a first sound outlet channel and a second sound outlet channel 224; the sound-emitting unit 23 is located in the body, and the diaphragm of the sound-emitting unit 23 separates the space of the body into a front cavity and a rear cavity 26, the first sound outlet channel is communicated with the front cavity and the first opening 11 respectively, so that the sound waves of the sound-emitting unit 23 in the front cavity are emitted after being transferred to the first opening 11 of the shell 10 through the first sound outlet channel; the second sound outlet channel 224 is communicated with the rear cavity 26 and the second opening 12 respectively, so that the sound waves of the sound-emitting unit 23 in the rear cavity 26 are emitted after being transferred to the second opening 12 of the shell 10 through the second sound outlet channel 224.

[0024] Figure 1 is a cross-sectional view of the first sound output channel corresponding to the Z plane, and Figure 2 is a cross-sectional view of the second sound output channel corresponding to the Z plane. Taking a mobile phone as an example, the plane where the length and width of the mobile phone are located is the XY plane, and the plane where the height or thickness of the mobile phone is located is the Z plane.

[0025] As shown in Figures 1 and 3, the main structures in the speaker include: a sound-emitting unit 23, such as a micro speaker unit; a speaker body, including a front shell 21 corresponding to the front cavity and a rear shell 22 corresponding to the rear cavity 26; a first sound output channel, including a vibration space 216 and a front cavity sound guide channel 214 in the speaker; the rear cavity 26 and the rear cavity powder filling area 27 in the rear cavity 26, which increases the equivalent volume by filling granular material.

[0026] The front shell 21 and the rear shell 22 include a plastic part and a steel sheet part that is often present. The speaker and the housing 10 of the electronic device are connected and sealed through a dustproof net and a sealing auxiliary material 51. In order to ensure reliability issues such as waterproofing and dustproofing, the dustproof net and the dustproof net in the sealing auxiliary material 51 can be one or more pieces.

[0027] A first opening 11 is formed on the housing 10, and the first opening 11 is connected to the vibration space 216 inside the speaker through the front cavity sound guide channel 214. The sound waves emitted by the sound-emitting unit 23 are transmitted to the first opening 11 of the housing 10 through the vibration space 216 inside the speaker, the front cavity sound guide channel 214, the dustproof net and the sealing auxiliary material 51 through the vibration of the diaphragm, and are emitted, thereby realizing the external sound function of the speaker. In the embodiment of Figure 1, since the front cavity sound guide channel 214 is inclined along the Z direction, the middle part of the front cavity sound guide channel 214 is blocked by the corresponding rigid structure in Figure 3.

[0028] Specifically, the body includes a front shell 21 corresponding to the front cavity and a rear shell 22 corresponding to the rear cavity 26 , and the second sound output channel is provided on the front shell 21 or the rear shell 22 .

[0029] As shown in FIG2 and FIG3, a second sound outlet channel 224 is designed on the speaker body portion corresponding to the rear cavity 26 of the speaker, such as the front shell 21 or the rear shell 22, and the channel can be used for heat dissipation of the speaker.

[0030] The housing 10 is formed with a second opening 12, which connects to the rear cavity 26 via a second sound outlet channel 224. The sound waves emitted by the sound-emitting unit 23 are transmitted through the second sound outlet channel 224 to the second opening 12 of the housing 10 due to the vibration of the diaphragm, and then emitted from the rear cavity 26. This promotes convective heat exchange between the air in the rear cavity 26 and the outside world, thereby achieving the heat dissipation function of the speaker.

[0031] Therefore, by forming a forced heat dissipation channel including the second sound outlet channel 224 and the second opening 12 in the rear cavity 26, the heat energy of the rear cavity 26 is exchanged with the outside through this forced heat dissipation channel, so that the heat emitted by the speaker can be quickly dissipated.

[0032] 1 and 2 , the speaker is located close to the battery 31 . Without forming a forced heat dissipation channel in the rear cavity 26 , the heat generated in the speaker can be transferred to the battery 31 , thereby heating the battery cover 32 . This will cause the temperature of the electronic device housing to rise, causing damage to the components of the electronic device.

[0033] The embodiment of the present application forms a forced heat dissipation channel in the rear cavity 26, so that the heat generated by the speaker can be quickly dissipated to the outside of the electronic device, avoiding heating of the battery 31 and the battery cover 32, and reducing damage to the components of the electronic device.

[0034] Optionally, at least one of the length and caliber of the second sound outlet channel 224 and the length and caliber of the second opening 12 has a predetermined size, and the predetermined size is used to adjust the sound waves of the rear cavity 26 to be in phase with the sound waves of the front cavity 2.

[0035] Under normal circumstances, the front and rear cavity sound waves corresponding to the two sides of the speaker diaphragm have opposite phases and the same frequency. The sound waves with opposite phases will interfere with each other, causing an acoustic short circuit, affecting the acoustic effect of the speaker's external sound, and reducing the speaker's sound quality. To this end, in the embodiment of the present application, the sound waves emitted from the rear cavity 26 can be reversed by adjusting the dimensions of the speaker's second sound outlet channel 224 and the second opening 12 of the shell 10, such as the length and diameter. This makes the front and rear cavity sound waves on both sides of the diaphragm in phase, avoiding sound wave cancellation and ensuring the acoustic effect of the speaker's external sound.

[0036] Specifically, the area S and length L of the second opening 12 must satisfy a certain relationship, and the acoustic mass Ma of the second opening 12 and the acoustic compliance Ca brought by the rear cavity 26 must satisfy In order to make the sound wave inverted, the longer length L and smaller area S can theoretically achieve such a relationship, but a larger area S can dissipate more heat and obtain higher low-frequency gain. In the embodiment of the present application, the area of ​​the second opening 12 should be greater than 0.3m 2 .

[0037] In addition, the second sound outlet channel 224 and the second opening 12 can be in the form of a flat channel, which can ensure the sealing width in the Z direction, and at the same time, the shape of the second opening 12 can be set in sections so as not to affect the shape of the external hole.

[0038] Referring to Figure 2, optionally, the electronic device also includes: a dustproof net 52, which is arranged at the sound wave output port connected to the second sound output channel 224 and the second opening 12, and the dustproof net 52 has a predetermined sound resistance, and the predetermined sound resistance is used to adjust the sound quality of the sound waves in the rear cavity.

[0039] The dust screen 52 is used to prevent dust, and the acoustic impedance of the dust screen 52 is used to adjust the sound quality and ensure the acoustic effect of the speaker. A sealing material can also be placed at the location of the dust screen 52, which is tightly connected to the second opening 12 of the housing 10. The sealing material is added between the second sound outlet channel 224 and the second opening 12 of the housing to enhance the airtightness of the connection, thereby achieving a connection and sealing between the speaker and the housing 10 of the electronic device.

[0040] Thus, while ensuring the acoustic effect of the speaker, a very good forced convection effect can be obtained, promoting convection heat exchange between the air in the rear cavity 26 and the outside world.

[0041] Referring to Figure 4, the first opening 11 and the second opening 12 are located on the same surface of the housing 10. The first opening 11 and the second opening 12 are on the same surface, such as the exterior surface of the bottom of the phone. This exterior surface is also provided with, for example, a Type-C terminal 13, a microphone input hole 14, and a card slot 15.

[0042] By arranging the first opening 11 and the second opening 12 on the same surface, the appearance requirements of the electronic device can be better met, avoiding the constraints on the application of the overall device design. While ensuring the elegance and beauty of the appearance, the acoustic performance, temperature rise performance, reliability and process are also guaranteed.

[0043] Now refer to Figure 5, which shows a simulation comparing the flow rate through the second opening connected to the second sound outlet channel of the rear cavity with the flow rate through the first opening connected to the first sound outlet channel of the front cavity. As can be seen from the curve comparison in Figure 5, the flow rate through the second opening is of the same order of magnitude as the flow rate through the first opening in the low and medium frequency ranges. Similar to the first sound outlet channel of the front cavity, it can achieve a good mass flow exchange with the low-temperature air in the external space, creating a forced convection effect.

[0044] However, a sound wave signal contains low-frequency and high-frequency components. When played, the larger amplitude and sound wave speed generated by the low-frequency component will promote the convective heat exchange between the heated gas in the rear cavity of the speaker and the low-temperature air outside, thereby significantly suppressing the temperature rise of the speaker and reducing the temperature rise effect generated when playing sound.

[0045] In addition, the embodiment of the present application adjusts the size of the second sound outlet channel and / or the second opening 12 so that the sound waves emitted by the sound-emitting unit generate in-phase sound waves in the rear cavity and the front cavity of the speaker. The in-phase sound waves will not cause an acoustic short circuit, and by adjusting the acoustic resistance of the dustproof net, an acoustic effect consistent with the conventional solution can be obtained. As shown in Figure 6, the solid line curve represents the acoustic effect of the conventional solution, and the dotted line curve represents the acoustic effect of the speaker of the embodiment of the present application. It can be seen that the embodiment of the present application can avoid the influence of the acoustic short circuit, and the acoustic effect in the frequency band above 200Hz in actual application of electronic equipment is not inferior to the conventional solution.

[0046] Therefore, the embodiment of the present application designs a second sound outlet channel in the rear cavity and shell of the speaker as a forced heat dissipation channel, thereby utilizing the forced convection generated when the sound unit is working to promote heat exchange between the high-temperature air in the rear cavity and the low-temperature air outside, thereby reducing the temperature rise effect generated during playback.

[0047] At the same time, by properly controlling the size of the heat dissipation channel and the dust screen, the acoustic effect of the speaker of the electronic device of the present application embodiment can be guaranteed to be no less than that of conventional solutions. This can improve the temperature rise while still maintaining the original acoustic performance of the speaker. The structure is simple and manufacturable, and the application prospects are broad.

[0048] If the lengths of the second opening 12 of the shell 10 and the second sound outlet channel 224 of the speaker are insufficient to meet the requirements of acoustic effects and / or effective heat dissipation, referring to Figure 7, in one embodiment, the electronic device further includes: a third sound outlet channel, which is connected to the second opening 12 and is arranged on the outer surface of the shell 10 in a direction parallel to the cross-section of the second opening 12; the sound wave of the sound-emitting unit 23 in the rear cavity 26 is emitted after being transmitted to the second opening 12 of the shell 10 and the outlet of the third sound outlet channel through the second sound outlet channel 224.

[0049] 7 , the third sound outlet channel includes: a first groove 131, which is connected to the second opening 12 and is opened on the outer surface of the shell 10 in a direction parallel to the cross section of the second opening 12; a decorative structure 132, which covers the first groove to form a closed sound outlet channel, and a third opening 133 is provided on the decorative structure 132 at a position away from the second opening 12 to serve as the outlet of the third sound outlet channel.

[0050] The plane shown in FIG4 is parallel to the cross section of second opening 12. A first groove 131 is formed along a direction parallel to the cross section of second opening 12, similar to the shape of slot 15 in FIG4 , on the outer surface of housing 10. One end of first groove 131 communicates with second opening 12 and extends leftward or rightward for a predetermined length in a direction parallel to the cross section of second opening 12 and perpendicular to the axis of second opening 12 (i.e., along the X direction of the electronic device). First groove 131 is sealed with a decorative structure 132 and glue, and sound waves are emitted from a third opening 133 of the decorative structure on the far end of decorative structure 132.

[0051] This embodiment is suitable for situations where the second sound outlet channel inside the speaker and the second opening in the housing are insufficiently long, and additional length is needed along the X-direction of the entire device. This can be achieved by creating a groove on the outer surface of the housing and sealing it to form the required additional channel. This additional channel length in the X-direction on the exterior of the housing improves the acoustic performance of the speaker and increases the flow rate at the second opening in the housing, ensuring adequate airflow while meeting bass performance requirements.

[0052] Referring to Figure 8, in another embodiment, the electronic device also includes: a fourth sound outlet channel, which is connected to the second sound outlet channel 224 and is arranged on the main body corresponding to the rear cavity 26 in a direction parallel to the cross-section of the second sound outlet channel 224; the sound-emitting unit 23 emits the sound waves in the rear cavity 26 after being transmitted to the second opening 12 of the shell 10 through the fourth sound outlet channel and the second sound outlet channel 224.

[0053] In combination with Figures 8 and 9, Figure 9 is a partial enlarged view of area A in the electronic device of the embodiment of Figure 8. As shown in the figure, the fourth sound outlet channel includes: a second groove 141, which is connected to the second sound outlet channel 224 and is opened on the main body corresponding to the rear cavity 26 along a direction parallel to the cross section of the second sound outlet channel 224; a sealing bone position 144, which surrounds the sound wave output port 2242 connecting the second sound outlet channel 224 and the second groove 141; a sealing structure 142, which is fixed on the sealing bone position 144 and covers the second groove 141, and a fifth opening 143 is provided on the sealing structure 142 at a position away from the second sound outlet channel 224 to serve as the sound wave input port connecting the fourth sound outlet channel and the rear cavity 26.

[0054] In this embodiment, a second groove 141 is provided on the rear housing corresponding to the rear cavity within the speaker. One end of the second groove 141 communicates with the second sound outlet channel 224 and extends a predetermined length to the left or right along the X-direction of the electronic device. The second groove 141 is sealed by a sealing structure 142, such as a PET sheet, which covers both the second groove 141 and the second sound outlet channel 224.

[0055] As shown in Figures 9 and 11, Figure 11 is a partial enlarged view of area B in the electronic device of the embodiment of Figure 10. For example, a sealing frame 144 is provided in the rear cavity 26 of the speaker. This sealing frame 144 surrounds the sound wave output port 2242 connecting the second sound output channel 224 and the fourth sound output channel. The sealing structure 142 is fixed to the sealing frame 144 by gluing. The sealing frame 144 is a circle and can be made of plastic or other materials.

[0056] The PET sheet can be made of PET or other relatively hard materials. Furthermore, a fifth opening 143 is formed at the distal end of the sealing structure 142, communicating with the rear cavity 26. Air in the rear cavity 26 can pass through the fifth opening 143 and the fourth sound outlet channel to connect with the second sound outlet channel 224. This allows air in the rear cavity 26 to pass from the sound wave input port corresponding to the fifth opening 143 through the fourth sound outlet channel to the sound wave output port 2242.

[0057] Since the sealing structure 142 is provided on the speaker body and the fourth sound outlet channel is used to exchange air with the outside world for heat dissipation and cooling, the housing 10 further includes a fourth opening (not shown). The fifth opening 143 of the sealing structure 142 is connected to the fourth opening of the housing 10, so that sound waves in the speaker rear cavity 26 can be emitted through the fifth opening 143, the fourth sound outlet channel, the sound wave output port 2242, the second sound outlet channel 224, and the second opening 12. The sound waves are connected to the outside air, thereby dissipating heat from the speaker rear cavity.

[0058] This embodiment is suitable for situations where the second sound outlet channel inside the speaker and the second opening of the housing are insufficiently long, and the bottom surface of the housing is not suitable for decorative structures. This can be achieved by creating a groove in the speaker body and sealing it to form the required additional channel. This additional channel length in the X direction inside the speaker improves the speaker's acoustic performance and increases the flow rate at the second opening of the housing, ensuring adequate airflow while meeting bass performance requirements.

[0059] In addition, in order to enhance the convection between the air in the rear cavity and the outside air, referring to Figures 10 and 11, in one embodiment, the electronic device also includes: a vibration component 152, which is arranged on the sealing structure 142 through the sealing bone position 144, and is used to push the sound waves in the rear cavity 26 through the fourth sound outlet channel and the second sound outlet channel 224 to the second opening 12.

[0060] As shown in the partial enlarged view of the corresponding area B in Figure 11, a sealing bone position 144 is set in the rear cavity 26 of the speaker. The sealing bone position 144 surrounds the sound wave output port 2242 connected to the second sound output channel 224 and the fourth sound output channel. The vibration component 152 is fixed to the sealing bone position 144 by glue. The vibration component 152 is set on the sealing structure 142, that is, on the fourth sound output channel.

[0061] When the sound unit 23 plays, it pushes the air in the rear cavity 26, and the air in the rear cavity then pushes the vibration component 152 to vibrate. The vibration pushes the second sound outlet channel 224 to exchange heat with the outside air, thereby strengthening the convection between the air in the rear cavity and the outside air, and improving the heat dissipation efficiency of the radiator rear cavity.

[0062] In one embodiment, the vibration assembly 152 has a predetermined area and a counterweight 1522, wherein the predetermined area is not less than one twentieth of the diaphragm area inside the sound unit 23 and not more than one half of the diaphragm area inside the sound unit 23; the counterweight 1522 is arranged close to the rear cavity 26.

[0063] To promote convection flow, the diaphragm area of ​​vibration assembly 152 must be as large as possible. The use of the vibration assembly prevents impurities such as dust and water from entering rear cavity 26, improving the reliability of the speaker module. Furthermore, the counterweight 1522 of vibration assembly 152 can increase the equivalent acoustic mass of the second opening 12. A larger counterweight mass corresponds to a greater equivalent acoustic mass. By properly adjusting the counterweight, the tuning frequency of the cabinet can be controlled to better achieve the target performance value.

[0064] The weight and compliance of the material need to be finely tuned, and the material of the weight should be a thermally conductive or thin material. In this embodiment, by increasing the area of ​​the vibration component and adjusting the weight dimensions, the speaker of the electronic device can achieve better performance and reliability by adjusting the weight and area.

[0065] In an embodiment of the present application, an electronic device includes a speaker and a shell, and a first opening and a second opening are provided on the shell; the speaker includes a body, a sound-emitting unit, a first sound output channel, and a second sound output channel; the sound-emitting unit is located in the body, and the diaphragm of the sound-emitting unit divides the space of the body into a front cavity and a rear cavity, and the first sound output channel is connected to the front cavity and the first opening respectively, so that the sound waves of the sound-emitting unit in the front cavity are emitted after being transmitted to the first opening of the shell through the first sound output channel; the second sound output channel is connected to the rear cavity and the second opening respectively, so that the sound waves of the sound-emitting unit in the rear cavity are emitted after being transmitted to the second opening of the shell through the second sound output channel, thereby forming a forced heat dissipation channel in the rear cavity of the speaker, so that the heat energy of the rear cavity is heat-exchanged with the outside world through this forced heat dissipation channel, so that the heat emitted by the speaker can be quickly dissipated, thereby improving the heat dissipation efficiency of the speaker, overcoming the problem of excessive temperature rise caused by slow heat dissipation of the speaker, and reducing damage to the components of the electronic device.

[0066] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An electronic device comprising a speaker and a housing, The shell is provided with a first opening and a second opening; The speaker comprises a body, a sound-emitting unit, a first sound output channel and a second sound output channel; The sound-emitting unit is located in the accommodation space surrounded by the main body, and the diaphragm of the sound-emitting unit divides the accommodation space into a front cavity and a rear cavity. The first sound output channel is respectively connected with the front cavity and the first opening, so that the sound-emitting unit emits sound waves after the sound waves in the front cavity are transferred to the first opening of the shell through the first sound output channel; the second sound output channel is respectively connected with the rear cavity and the second opening, so that the sound-emitting unit emits sound waves after the sound waves and heat energy in the rear cavity are transferred to the second opening of the shell through the second sound output channel.

2. The electronic device according to claim 1, wherein: At least one of the length and the caliber of the second sound outlet channel and the length and the caliber of the second opening has a predetermined size, and the predetermined size is used to adjust the sound waves of the rear cavity to be in phase with the sound waves of the front cavity.

3. The electronic device according to claim 1, wherein: Also includes: A dustproof net is arranged at the sound wave output port connected to the second sound output channel and the second opening and covers the sound wave output port, and the dustproof net is used to adjust the sound quality of the sound waves in the rear cavity.

4. The electronic device according to claim 1, wherein: The first opening and the second opening are located on the same surface of the housing.

5. The electronic device according to claim 1, wherein: The body includes a front shell corresponding to the front cavity and a rear shell corresponding to the rear cavity, and the second sound outlet channel is arranged on the front shell or the rear shell.

6. The electronic device according to claim 1, wherein: Also includes: a third sound outlet channel, connected to the second opening, and arranged on the outer surface of the housing in a direction parallel to the cross section of the second opening; The sound-emitting unit emits sound waves in the rear cavity after being transmitted to the second opening of the shell and the outlet of the third sound outlet channel through the second sound outlet channel.

7. The electronic device according to claim 6, wherein: The third sound output channel includes: A first groove, connected to the second opening, and opened on the outer surface of the shell in a direction parallel to the cross section of the second opening; A decorative structure covers the first groove to form a closed sound outlet channel. A third opening is provided at a position away from the second opening to serve as an outlet of the third sound outlet channel.

8. The electronic device according to claim 1, wherein: Also includes: a fourth sound outlet channel, which is communicated with the second sound outlet channel and the rear cavity respectively, and is arranged on the body corresponding to the rear cavity along a direction parallel to the cross section of the second sound outlet channel; The sound waves of the sound-emitting unit in the rear cavity are emitted after being transmitted to the second opening of the shell through the fourth sound outlet channel and the second sound outlet channel.

9. The electronic device according to claim 8, wherein: The fourth sound channel includes: A second groove is communicated with the second sound outlet channel and is formed on the body corresponding to the rear cavity in a direction parallel to a cross section of the second sound outlet channel; A sealing bone position, surrounding the sound wave output port of the second sound output channel communicating with the second groove; The sealing structure is fixed on the sealing bone position and covers the second groove. A fifth opening is provided on the sealing structure away from the second sound outlet channel to serve as a sound wave input port for connecting the fourth sound outlet channel with the rear cavity.

10. The electronic device according to claim 9, wherein: Also includes: A vibration component is arranged on the sealing structure through the sealing bone position, and is used to push the sound waves in the rear cavity to be emitted to the second opening through the fourth sound outlet channel and the second sound outlet channel.

11. The electronic device according to claim 10, wherein: The vibration assembly has a predetermined area and a counterweight, wherein the predetermined area is not less than one twentieth of the area of ​​the diaphragm inside the sound unit and not more than one half of the area of ​​the diaphragm inside the sound unit; The counterweight is disposed adjacent to the rear cavity.

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