CN219834359U

CN219834359U - Acoustic device

Info

Publication number: CN219834359U
Application number: CN202320399111.9U
Authority: CN
Inventors: 于龙欣
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-10-13
Anticipated expiration: 2033-02-28

Abstract

The utility model belongs to the technical field of sound production equipment, and particularly relates to an acoustic device. The acoustic device comprises a shell and a sounding monomer, wherein an installation cavity is arranged in the shell, the sounding monomer is arranged in the installation cavity, the sounding monomer comprises a vibrating diaphragm assembly and a magnetic circuit assembly, the vibrating diaphragm assembly comprises a first surface and a second surface which are oppositely arranged, the first surface is arranged at intervals with the inner wall surface of the installation cavity and forms a first acoustic cavity between the first surface and the installation cavity, the second surface is arranged at intervals with the magnetic circuit assembly and forms a second acoustic cavity between the second surface and the magnetic circuit assembly, the shell is further provided with a first acoustic outlet and a second acoustic outlet, the first acoustic outlet is communicated with the outside of the shell and the first acoustic cavity, the second acoustic outlet is communicated with the outside of the shell and the second acoustic cavity, and a plane where the first acoustic outlet is positioned and a plane where the second acoustic outlet is positioned form an included angle. According to the acoustic device provided by the utility model, the sound diffusion in the audio output process of the acoustic device can be reduced, and the privacy of the acoustic device is improved.

Description

Acoustic device

Technical Field

The utility model belongs to the technical field of sound production equipment, and particularly relates to an acoustic device.

Background

With the development of science and technology, electronic devices such as mobile phones and tablet computers become important application tools for people, wherein an audio call function is one of the most basic and most important functions of the electronic devices. Generally, a sounding module is arranged in the electronic equipment, and the sounding module sounds so as to realize audio output. However, the problem of sound diffusion easily occurs in the process of audio output of the existing sound generating module, so that other people except users can hear the audio output of the electronic equipment, the privacy of the electronic equipment is poor, and the user experience is affected.

Disclosure of Invention

The utility model aims to at least solve the problem that sound diffusion easily occurs in the audio output process of a sound production module, and the aim is realized by the following modes:

a first aspect of the present utility model proposes an acoustic device comprising:

the shell is internally provided with an installation cavity;

the sound production unit is arranged in the mounting cavity and comprises a vibrating diaphragm assembly and a magnetic circuit assembly, the vibrating diaphragm assembly comprises a first surface and a second surface which are oppositely arranged, the first surface and the inner wall surface of the mounting cavity are arranged at intervals, a first sound cavity is formed between the first surface and the inner wall surface of the mounting cavity, and the second surface and the magnetic circuit assembly are arranged at intervals, and a second sound cavity is formed between the second surface and the magnetic circuit assembly;

the shell is further provided with a first sound outlet and a second sound outlet, the first sound outlet is communicated with the outside of the shell and the first sound cavity, the second sound outlet is communicated with the outside of the shell and the second sound cavity, and the plane where the first sound outlet is located and the plane where the second sound outlet is located form an included angle.

According to the acoustic device, the first acoustic cavity and the second acoustic cavity are respectively formed on two sides of the surface of the vibrating diaphragm assembly, the first acoustic outlet communicated with the first acoustic cavity and the second acoustic outlet communicated with the second acoustic cavity are formed in the shell, when the sounding single body sounds, forward sound waves of the sounding single body are transmitted to the outside of the shell through the first acoustic outlet to form first sound wave signals radiating outwards, reverse sound waves of the sounding single body are transmitted to the outside of the shell through the second acoustic outlet to form second sound wave signals radiating outwards, and the phases of the second sound wave signals are opposite to those of the first sound wave signals, so that the second sound wave signals can be coupled with the first sound wave signals of the sounding single body to offset part of forward sound waves, therefore, sound diffusion in the audio output process of the acoustic device is reduced, and the privacy of the acoustic device is improved.

In addition, the acoustic device according to the present utility model may have the following additional technical features:

in some embodiments of the present utility model, the plane in which the first sound outlet is located is a first plane, the plane in which the second sound outlet is located is a second plane, and the first plane and the second plane are disposed at an included angle of 90 °.

In some embodiments of the utility model, the outlet area of the first sound outlet and the outlet area of the second sound outlet are respectively greater than or equal to 3mm ₂ 。

In some embodiments of the present utility model, the housing further includes a first sound outlet channel and a second sound outlet channel, the first sound outlet channel communicates with the first sound outlet and the first sound cavity, the second sound outlet channel communicates with the second sound outlet and the second sound cavity, wherein, along a vibration direction of the diaphragm assembly, a size of the first sound outlet channel is greater than or equal to 0.4mm, and a size of the second sound outlet channel is greater than or equal to 0.4mm.

In some embodiments of the present utility model, the sounding unit further includes a sounding cover, the sounding cover is covered on the diaphragm assembly, an edge of the sounding cover is fixed on the first surface, the sounding cover is provided with at least one through hole communicated with the first sound cavity, at least part of the sounding cover is spaced from an inner wall surface of the installation cavity along a vibration direction of the diaphragm assembly, and a spacing dimension between at least part of the sounding cover and the inner wall surface of the installation cavity is greater than or equal to 0.1mm.

In some embodiments of the present utility model, the sound generating unit further includes a bracket, the magnetic circuit assembly includes a yoke, a center magnet disposed on the yoke, and a plurality of side magnets disposed around the center magnet, the plurality of side magnets are connected to the bracket, wherein at least one of the plurality of side magnets is disposed at intervals from the bracket and forms a sound hole, and the sound hole communicates the second sound cavity and the second sound channel.

In some embodiments of the present utility model, the plurality of side magnets includes at least a first side magnet extending along a first direction, and the first side magnet is disposed at a side of the center magnet along a second direction, and at least one end of the first side magnet is spaced apart from the bracket along the first direction and forms the sound passing hole, wherein a size of the sound emitting unit along the first direction is greater than a size of the sound emitting unit along the second direction.

In some embodiments of the utility model, the bracket is provided with a first extension away from the second acoustic chamber, and the yoke is provided with a second extension away from the second acoustic chamber; the first extension part and the second extension part are spaced to form the second sound outlet channel, or the first extension part and the second extension part are spaced to form a sound guide section communicated with the sound passing hole and the second sound outlet channel.

In some embodiments of the utility model, the acoustic device is for an electronic apparatus, the electronic apparatus comprising:

a housing;

the shell is of at least one part of structure of the shell, the shell is provided with a first sound outlet and a second sound outlet, or the shell is connected with the shell, the shell is further provided with a first opening and a second opening, the first opening is opposite to the first sound outlet, and the second opening is opposite to the second sound outlet.

In some embodiments of the present utility model, the housing includes a screen mounting surface and a circumferential side surface connected to an edge of the screen mounting surface, wherein the screen mounting surface is provided with the first sound outlet, and the circumferential side surface is provided with the second sound outlet.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

FIG. 1 is a schematic view of an internal structure of an acoustic device according to an embodiment of the present utility model;

fig. 2 is a schematic view illustrating an internal structure of a first housing according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the overall structure of a sound-producing monomer according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating a split structure of a sounding monomer according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a sound-emitting unit according to an embodiment of the present utility model along a second direction;

fig. 6 is a schematic structural view of a supporting portion according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a part of a magnetic circuit assembly according to an embodiment of the present utility model;

fig. 8 is a schematic diagram showing an internal structure of a sound generating unit according to an embodiment of the present utility model after the yokes are removed.

The reference numerals in the drawings are as follows:

1: an acoustic device;

10: a housing, 11: first housing, 111: first sound outlet, 112: second sound outlet, 113: first sound outlet channel, 114: second sound outlet channel, 115: mounting groove, 116: protruding end, 117: screen mounting face, 118: circumferential side, 12: second housing, 13: a mounting cavity;

20: sounding monomer, 21: support, 211: first mounting portion, 212: second mounting portion, 213: third mounting portion, 214: fourth mounting portion 215: a boss, 216: sound hole, 217: first extension, 22: diaphragm assembly, 221: diaphragm, 222: dome, 223: first surface, 224: second surface, 23: magnetic circuit assembly, 231: center magnet, 232: first side magnet, 233: second side magnet, 234: third side magnet, 235: fourth magnet, 236: center magnetically permeable plate, 237: yoke, 2371: second extension, 24: voice coil, 25: centering support, 26: sound cover 261: through holes, 27: dust screen, 28: first acoustic cavity, 29: and a second sound cavity.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In order to solve the problem that sound diffusion easily occurs in the audio output process of a sound production module, the utility model provides an acoustic device, wherein the acoustic device can be a mobile phone, a computer, a tablet or a loudspeaker module. By using the acoustic device, the sound diffusion in the audio output process of the acoustic device can be effectively reduced, and the privacy of the acoustic device is improved.

For convenience of description, the utility model is exemplified by using the acoustic device as an electronic device such as a mobile phone, a computer, a tablet, etc.

Referring to fig. 1 to 5, in some embodiments of the present utility model, the acoustic device 1 includes a housing 10 and a sounding unit 20, a mounting cavity 13 is disposed in the housing 10, the sounding unit 20 is disposed in the mounting cavity 13, the sounding unit 20 includes a diaphragm assembly 22 and a magnetic circuit assembly 23, the diaphragm assembly 22 includes a first surface 223 and a second surface 224 that are disposed opposite to each other, the first surface 223 is disposed at a distance from an inner wall surface of the mounting cavity and forms a first acoustic cavity 28 therebetween, the second surface 224 is disposed at a distance from the magnetic circuit assembly 23 and forms a second acoustic cavity 29 therebetween, wherein the housing 10 is further provided with a first acoustic outlet 111 and a second acoustic outlet 112, the first acoustic outlet 111 is in communication with the exterior of the housing 10 and the first acoustic cavity 28, the second acoustic outlet 112 is in communication with the exterior of the housing 10 and the second acoustic cavity 29, and a plane in which the first acoustic outlet 111 is disposed at an included angle with a plane in which the second acoustic outlet 112 is disposed.

Specifically, in some embodiments of the present utility model, the sounding unit 20 includes a support 21, a diaphragm assembly 22 and a magnetic circuit assembly 23, a receiving cavity having an opening at one end is formed inside the support 21, the magnetic circuit assembly 23 is disposed in the receiving cavity, and the diaphragm assembly 22 is disposed at the opening at one end of the support 21 and is disposed opposite to the magnetic circuit assembly 23. The diaphragm assembly 22 includes a first surface 223 and a second surface 224, the first surface 223 and the second surface 224 being disposed on opposite sides of the diaphragm assembly 22, respectively. The second surface 224 is disposed opposite to the magnetic circuit assembly 23, and forms a second sound cavity 29 with the magnetic circuit assembly 23, and the first surface 223 is disposed opposite to the inner wall surface of the mounting cavity 13, and forms a first sound cavity 28 with the inner wall surface of the mounting cavity 13.

In some embodiments of the present utility model, the sound emitting monomer 20 further includes a voice coil 24, the voice coil 24 being capable of being coupled to the second surface 224 of the diaphragm assembly 22. Specifically, in order to ensure the stability of the vibration of the diaphragm assembly 22, a centering support 25 is further disposed between the voice coil 24 and the second surface 224, and the centering support 25 is attached to the second surface 224. One end of the voice coil 24 is connected with the centering support piece 25, and the other end of the voice coil 24 is inserted into the magnetic circuit assembly 23. When the voice coil 24 is in an energized state, the voice coil 24 can vibrate reciprocally along the axial direction under the action of the magnetic circuit assembly 23, so as to drive the diaphragm assembly 22 to vibrate and sound, and form acoustic signals in the first acoustic cavity 28 and the second acoustic cavity 29 respectively. The acoustic wave signals in the first acoustic cavity 28 are transmitted to the outside of the housing 10 through the first acoustic outlet 111 and form a first acoustic wave signal, and the acoustic wave signals in the second acoustic cavity 29 are transmitted to the outside of the housing 10 through the second acoustic outlet 112 and form a second acoustic wave signal. Because the second sound wave signal is formed by the reverse sound wave of the sounding monomer 20, the phase of the second sound wave signal is opposite to that of the first sound wave signal, so that the second sound wave signal can be coupled with the first sound wave signal of the sounding monomer 20 to offset part of the forward sound wave, thereby reducing sound diffusion in the audio output process of the acoustic device 1 and improving the privacy of the acoustic device 1. Meanwhile, since only one sounding monomer 20 is provided inside the case 10 of the acoustic device 1 in the present utility model, the thickness dimension of the acoustic device 1 in the vibration direction of the diaphragm assembly 22 can be effectively shortened.

The plane where the first sound outlet 111 is located and the plane where the second sound outlet 112 is located are disposed at an included angle, so that a part of sound wave signals emitted by the first sound outlet 111 and the second sound outlet 112 can be received by a user, and another part of sound wave signals cancel each other, thereby preventing sound diffusion in the audio output process of the acoustic device 1 and improving the privacy of the acoustic device 1. Specifically, the plane where the first sound outlet 111 is located is a first plane, the plane where the second sound outlet 112 is located is a second plane, and the first plane and the second plane form an included angle of 90 degrees.

As shown in fig. 4 and 5, in some embodiments of the present utility model, the diaphragm assembly 22 includes a diaphragm 221 and a dome 222, the diaphragm 221 is disposed closer to the magnetic circuit assembly 23 than the dome 222, a surface of the diaphragm 221 opposite to the magnetic circuit assembly 23 forms a first surface 223, the dome 222 is attached to a surface of a side of the diaphragm 221 facing away from the magnetic circuit assembly 23, and a surface of the dome 222 facing away from the diaphragm 221 forms a second surface 224.

As shown in fig. 1 and 2, in some embodiments of the present utility model, the outlet area of the first sound outlet 111 and the outlet area of the second sound outlet 112 are 3mm or more, respectively ² Thereby causing the difference between the high frequency cut-off frequency of the first sound outlet 111 and the high frequency cut-off frequency of the second sound outlet 112 to be less than or equal to 2kHz, reducing the sound diffusion in the audio output process of the acoustic device 1, and improving the soundPrivacy of the learning device 1. The opening shape of the first sound outlet 111 or the second sound outlet 112 may be a circle, a strip, or any other shape.

Referring to fig. 1 and 2 again, in some embodiments of the present utility model, the housing 10 further includes a first sound outlet 113 and a second sound outlet 114, where the first sound outlet 113 communicates with the first sound outlet 111 and the first sound cavity 28, and the second sound outlet 114 communicates with the second sound outlet 112 and the second sound cavity 29, and along the vibration direction of the diaphragm assembly 22, the size of the first sound outlet 113 is greater than or equal to 0.4mm, and the size of the second sound outlet 114 is greater than or equal to 0.4mm, so that the difference between the high frequency cut-off frequency of the first sound outlet 111 and the high frequency cut-off frequency of the second sound outlet 112 is less than or equal to 2kHz, which reduces sound diffusion during the audio output of the acoustic device 1, and improves the privacy of the acoustic device 1.

Referring to fig. 1 to 5, in some embodiments of the present utility model, the sound generating unit 20 further includes a sound generating cover 26, the sound generating cover 26 is covered on the diaphragm assembly 22, an edge of the sound generating cover 26 is fixed on the first surface 223, the sound generating cover 26 is provided with at least one through hole 261 communicated with the first sound cavity 28, at least part of the sound generating cover 26 is spaced from an inner wall surface of the mounting cavity 13 along a vibration direction of the diaphragm assembly 22, and at least part of the sound generating cover 26 is spaced from the inner wall surface of the mounting cavity 13 by a size equal to or greater than 0.1mm, so as to ensure that a sufficient space exists between the sound generating unit 20 and the inner wall surface of the mounting cavity 13 for outputting sound waves.

Specifically, the sound emitting cover 26 is connected to the outer edge of the diaphragm 221, and the housing 10 is provided with a mounting groove 115 inside, and at least a portion of the sound emitting cover 26 is disposed in the mounting groove 115 and connected to the edge of the mounting groove 115, thereby fixing the sound emitting unit 20 to the inside of the housing 10. The housing 10 includes a first housing 11 and a second housing 12 that are connected in a matching manner, a mounting groove 115 is provided in the first housing 11, and a first sound outlet 111 and a second sound outlet 112 are provided on the first housing 11. The first housing 11 is also provided with a protruding end 116 protruding from the interior thereof, and the second sound outlet channel 114 is provided through the protruding end 116, so that the second sound outlet 112 is in communication with the second sound chamber 29.

As shown in fig. 4 to 7, in some embodiments of the present utility model, the magnetic circuit assembly 23 includes a yoke 237, a center magnet 231 provided to the yoke 237, and a plurality of side magnets looped outside the center magnet 231, the plurality of side magnets being connected to the bracket 21, wherein at least one of the plurality of side magnets is spaced apart from the bracket 21 and forms a sound passing hole 216, and the sound passing hole 216 communicates with the second sound cavity 29 and the second sound outlet channel 114.

Specifically, the plurality of side magnets includes a first side magnet 232, a second side magnet 233, a third side magnet 234, and a fourth side magnet 235, the first side magnet 232 and the second side magnet 233 extend along a first direction, respectively, and the first side magnet 232 and the second side magnet 233 are disposed opposite each other along a second direction, the third side magnet 234 and the fourth side magnet 235 extend along a second direction, respectively, and the third side magnet 234 and the fourth side magnet 235 are disposed opposite each other along the first direction. The dimension of the sounding monomer 20 along the first direction is greater than the dimension of the sounding monomer 20 along the second direction, i.e. the first direction is the length direction of the sounding monomer 20, and the second direction is the width direction of the sounding monomer 20. At least one end of the first side magnet 232 is spaced apart from the bracket 21 in the first direction and forms the sound passing hole 216. The through hole 216 can also communicate with a magnetic gap formed between the center magnet 231 and the first side magnet 232. The opening area of the sound passing hole 216 can be adjusted by adjusting the size of the first side magnet 232 and/or the size of the first mounting portion 211 in the first direction.

Specifically, the support 21 has a substantially rectangular structure, and has openings at both ends, wherein one side of the opening is connected to the diaphragm assembly 22, and the other side of the opening is connected to the yoke 237. The bracket 21 includes a first mounting position 211, a second mounting position 212, a third mounting position 213, and a fourth mounting position 214, wherein the first mounting position 211 and the second mounting position 212 are disposed opposite each other in a second direction, and the third mounting position 213 and the fourth mounting position 214 are disposed opposite each other in the first direction. The first side magnet 232 is disposed in the first mounting location 211, and along the first direction, the size of the first side magnet 232 is smaller than that of the first mounting location 211, at least one end of the first side magnet 232 is spaced from the side wall of the first mounting location 211, and a through hole 216 is formed, so that the second sound cavity 29 and the second sound outlet channel 114 are communicated through the through hole 216. The second side magnet 233 is disposed in the second mounting position 212, the second side magnet 233 is tightly attached to the side wall of the second mounting position 212, the third side magnet 234 is disposed in the third mounting position 213, the third side magnet 234 is tightly attached to the side wall of the third mounting position 213, the fourth side magnet 235 is disposed in the fourth mounting position 214, and the fourth side magnet 235 is tightly attached to the side wall of the fourth mounting position 214. Wherein, still be equipped with bellying 215 between two adjacent installation positions, separate two adjacent installation positions through bellying 215.

In some embodiments of the present utility model, the central magnet 231 is further provided with a central magnetic conductive plate 236 in a fitting manner, so as to increase the magnetic induction intensity of the magnetic circuit assembly 23, and the side magnet may be further provided with a side magnetic conductive plate in a fitting manner, so as to further increase the magnetic induction intensity of the magnetic circuit assembly 23.

As shown in connection with fig. 1, 4, 6 and 8, in some embodiments of the present utility model, the stand 21 is provided with a first extension 217 away from the second sound chamber 29, and the yoke 237 is provided with a second extension 2371 away from the second sound chamber 29; the first extension 217 and the second extension 2371 are spaced apart to form the second sound outlet channel 114, or the first extension 217 and the second extension 2371 are spaced apart to form a sound guiding section that is connected through the sound hole 216 and the second sound outlet channel 114. Specifically, the outer edges of the first mounting portion 211 and the yoke 237 are disposed beyond the outer edge of the first side magnet 232, respectively, so as to form the first extension portion 217 and the second extension portion 2371, respectively, and the first extension portion 217 and the second extension portion 2371 are disposed at intervals, and form the second sound outlet channel 114, or form the sound guiding section connected through the sound hole 216 and the second sound outlet channel 114, so as to further facilitate the transmission of the sound wave signal in the second sound cavity 29.

Referring to fig. 4 and 5, in some embodiments of the present utility model, the sounding unit 20 further includes a dust-proof net 27, and the dust-proof net 27 is attached to the surface of the sounding cover 26, so as to prevent dust from falling onto the surface of the diaphragm assembly 22 through the through hole 261 of the sounding cover 26, and ensure normal acoustic transmission of the sounding unit 20.

As shown in fig. 1, in some embodiments of the utility model, the acoustic device 1 may be in the form of a speaker module as part of an electronic apparatus. The electronic device includes a housing, the housing is further provided with a first opening and a second opening, the housing 10 is connected with the housing, the first opening is opposite to the first sound outlet 111, and the second opening is opposite to the second sound outlet 112. The acoustic device 1 and the housing are of a split structure, so that the acoustic device 1 can be conveniently assembled in different electronic equipment, and in order to ensure the transmission of sound waves, a first opening and a second opening are formed in the housing, the first opening is opposite to the first sound outlet 111, and the second opening is opposite to the second sound outlet 112.

As shown in fig. 1, in some embodiments of the present utility model, the housing 10 is at least a part of a structure of a casing of the electronic device, and the casing is directly provided with a first sound outlet 111 and a second sound outlet 112.

As shown in fig. 1, in some embodiments of the utility model, the housing 10 may include a screen mounting surface 117 and a circumferential side surface 118 connected to an edge of the screen mounting surface 117, wherein the screen mounting surface 117 is provided with a first sound outlet 111 and the circumferential side surface 118 is provided with a second sound outlet 112.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. An acoustic device, comprising:

the shell is internally provided with an installation cavity;

2. The acoustic device of claim 1, wherein the plane in which the first sound outlet is located is a first plane, the plane in which the second sound outlet is located is a second plane, and the first plane is disposed at an angle of 90 ° to the second plane.

3. The acoustic device of claim 1, wherein the outlet area of the first acoustic outlet and the outlet area of the second acoustic outlet are each 3mm or more ₂ 。

4. The acoustic device of claim 1, wherein the housing further comprises a first sound outlet channel and a second sound outlet channel, the first sound outlet channel communicates with the first sound outlet and the first sound cavity, the second sound outlet channel communicates with the second sound outlet and the second sound cavity, wherein a dimension of the first sound outlet channel is greater than or equal to 0.4mm and a dimension of the second sound outlet channel is greater than or equal to 0.4mm along a vibration direction of the diaphragm assembly.

5. The acoustic device of claim 1, wherein the sound generating unit further comprises a sound generating cover, the sound generating cover is covered on the diaphragm assembly, the edge of the sound generating cover is fixed on the first surface, the sound generating cover is provided with at least one through hole communicated with the first sound cavity, at least part of the sound generating cover is arranged at intervals with the inner wall surface of the mounting cavity along the vibration direction of the diaphragm assembly, and at least part of the sound generating cover is spaced with the inner wall surface of the mounting cavity by more than or equal to 0.1mm.

6. The acoustic device of claim 4 wherein the sound generating unit further comprises a bracket, the magnetic circuit assembly comprises a magnetic yoke, a center magnet disposed on the magnetic yoke, and a plurality of side magnets disposed around the center magnet, the plurality of side magnets being connected to the bracket, wherein at least one of the plurality of side magnets is spaced from the bracket and forms a sound through hole, and the sound through hole communicates with the second sound cavity and the second sound outlet channel.

7. The acoustic device of claim 6 wherein the plurality of side magnets comprises at least a first side magnet extending in a first direction and the first side magnet is disposed laterally of the center magnet in a second direction, and wherein at least one end of the first side magnet is spaced from the support in the first direction and forms the sound passing hole, and wherein the sound emitting unit has a dimension in the first direction that is greater than a dimension of the sound emitting unit in the second direction.

8. The acoustic device of claim 6 wherein the bracket is provided with a first extension away from the second acoustic chamber and the yoke is provided with a second extension away from the second acoustic chamber; the first extension part and the second extension part are spaced to form the second sound outlet channel, or the first extension part and the second extension part are spaced to form a sound guide section communicated with the sound passing hole and the second sound outlet channel.

9. The acoustic device of any one of claims 1 to 8, wherein the acoustic device is for an electronic apparatus comprising:

a housing;

10. The acoustic device of any of claims 1 to 8 wherein the housing comprises a screen mounting surface and a circumferential side surface connected to an edge of the screen mounting surface, wherein the screen mounting surface is provided with the first sound outlet and the circumferential side surface is provided with the second sound outlet.