CN107682778B - Electroacoustic device and mobile terminal - Google Patents

Abstract

The electroacoustic device and mobile terminal provided by the present invention are provided with a socket on the box body. When a sound absorbing member is provided in the sound absorbing cavity, it is only necessary to insert the sound absorbing member into the sound absorbing cavity from the socket, thereby simplifying the manufacturing process. In addition, by changing the number and position of the socket and the sound absorbing member inserted into the socket, the filling amount and filling position of the sound absorbing member filled in the sound absorbing cavity can be adjusted accordingly, and the use requirements can be met more flexibly.

Description

Electroacoustic device and mobile terminal

technical field

The present invention relates to the field of electronic equipment, in particular to an electro-acoustic device and a mobile terminal.

Background technique

At present, in mobile terminal products, in order to enhance the sound quality of the electro-acoustic device, it is generally necessary to set a sound-absorbing cavity in the electro-acoustic device, and set sound-absorbing particles in the sound-absorbing cavity. In the prior art, in order to prevent the sound-absorbing particles from entering the electro-acoustic component, the sound-absorbing particles need to be isolated by a retaining wall to fix their positions, which makes the manufacturing process complicated.

SUMMARY OF THE INVENTION

The invention provides an electro-acoustic device and a mobile terminal with a simple manufacturing process.

The present invention provides an electro-acoustic device. The electro-acoustic device includes a box body, an electro-acoustic component disposed in the box body, and at least one sound-absorbing member. The electro-acoustic component includes an outer frame fixed in the box body. , the outer frame is provided with a leakage hole; the outer frame and the inner side wall of the box body are spaced apart to form a sound-absorbing cavity; the box body is provided with at least one socket, and the socket communicates with the sound-absorbing cavity; Each of the sound absorbing members is inserted into the sound absorbing cavity from one of the sockets, so that the sound absorbing member fills the sound absorbing cavity.

The present invention further provides a mobile terminal. The mobile terminal includes the mobile terminal including a body and the above-mentioned electro-acoustic device, and the electro-acoustic device is provided in the body.

The electro-acoustic device and the mobile terminal provided by the present invention are provided by arranging a socket on the box body. When the sound absorbing member is arranged in the sound absorbing cavity, the sound absorbing member only needs to be inserted into the sound absorbing cavity from the socket, thereby simplifying the manufacturing process. In addition, by changing the number and position of the sockets and the sound-absorbing member inserted into the socket, the filling amount and filling position of the sound-absorbing member filled in the sound-absorbing cavity can be adjusted accordingly. More flexible to meet the needs of use.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic cross-sectional view of an electroacoustic device provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the electroacoustic device provided by the embodiment described in FIG. 1;

3 is a schematic structural diagram of an electro-acoustic device provided by another embodiment;

4 is a schematic cross-sectional view of an electroacoustic device provided by another embodiment of the present invention;

5 is a schematic structural diagram of a sound absorbing member provided by an embodiment of the present invention;

6 is a schematic cross-sectional view of an electro-acoustic device provided by another embodiment of the present invention;

7 is a schematic structural diagram of the electroacoustic device provided in the embodiment of FIG. 7;

8 is a schematic cross-sectional view of an electroacoustic device provided by another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of the electroacoustic device provided by the embodiment of FIG. 8;

FIG. 10 is a schematic diagram of a mobile terminal according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 and FIG. 2 , the present invention provides an electro-acoustic device 100 . The electro-acoustic device 100 includes a box body 10 , an electro-acoustic component 20 and a sound-absorbing cavity 30 arranged in the box body 10 , and a box body 10 . At least one sound absorbing member 40 in the sound absorbing cavity 30 . In this embodiment, the electro-acoustic component 20 is located in the middle of the box body 10 , there are two sound-absorbing cavities 30 , and the two sound-absorbing cavities 30 are located on two sides of the box body 10 respectively. Referring to FIG. 3 , in another embodiment of the present invention, the electro-acoustic component 20 is located in the center of the box body 10 , the sound-absorbing cavity 30 is annular, and the annular sound-absorbing cavity 30 surrounds the Electroacoustic components 20 are provided. The box body 10 is further provided with at least one socket 15 , and the socket 15 penetrates the box body 10 and communicates with the sound-absorbing cavity 30 . Each of the sound absorbing members 40 is inserted into the sound absorbing cavity 30 from one of the sockets 15 , so that the sound absorbing member 40 fills the sound absorbing cavity 30 , thereby simplifying the description of the electro-acoustic device 100 Manufacturing process of the sound absorbing member 40 .

The box body 10 includes a bottom wall 11 , a top wall 12 opposite to the bottom wall 11 , and a side wall 13 connecting the bottom wall 11 and the top wall 12 . The box body 10 may be made of materials such as plastic or metal. The top wall 12 is provided with an opening, and the shape of the opening may be a long strip, a circle or various other shapes. In this embodiment, the box body 10 is a square box body. It can be understood that the box body 10 may also be a cylindrical box body or a box body of any other shape. The socket 15 on the box body 10 may be provided on the bottom wall 11 , the top wall 12 or the side wall 13 of the box body 10 according to actual needs. In this embodiment, the socket 15 is provided on the top wall 12 . In addition, there are two sockets 15 , and the two sockets 15 are respectively provided on both sides of the electro-acoustic component 20 . Referring to FIG. 3 , in another embodiment of the present invention, the socket 15 is one, and the socket 15 is disposed on the top wall 12 and surrounds the electro-acoustic component 20 .

The electro-acoustic assembly 20 includes an outer frame 21 , a diaphragm 22 disposed in the outer frame 21 and a driving assembly. The outer frame 21 is used to protect other components located therein. In this embodiment, the outer frame 21 is a square annular frame. It can be understood that the outer frame 21 may be a circular annular frame or a polygonal annular frame, etc., that is, the present invention does not limit the shape of the outer frame 21 . In addition, the outer frame 21 can be made of various materials such as plastic parts and metal parts. The outer frame 21 includes a top end and a bottom end opposite to the top end. In this embodiment, the outer frame 21 is located in the middle of the box body 10 , so that there is a certain interval between the outer frame 21 and the side wall 13 of the box body. The top end of the outer frame 21 abuts against and is fixed to the top wall 12 of the box body, and the bottom end of the outer frame 21 abuts against and is fixed to the bottom wall 11 of the box body. The bottom wall 11 , the top wall 12 , the side walls 13 and the outer frame 21 of the box body are sealed to form the sound-absorbing cavity 30 . The outer frame 21 is provided with a leakage hole 211 penetrating the outer frame 21 , and the leakage hole 211 communicates with the sound-absorbing cavity 30 and the inside of the outer frame 21 , so that the sound waves emitted from the outer frame 21 can be transmitted. It propagates into the sound absorbing cavity 30 through the leakage hole 211 , and enables the air in the sound absorbing cavity 30 and the air in the outer frame 21 to circulate, so as to ensure the vibration of the diaphragm 22 . At the same time, by connecting the outer frame 21 with the sound-absorbing cavity 30, the volume of the electro-acoustic device 100 can be increased, which is beneficial to produce a better bass effect. In this embodiment, there are two leakage holes 211 , and the two leakage holes 211 are opposite to the two sides of the outer frame 21 . The two sound-absorbing cavities 30 on the side communicate with each other. Therefore, the sound waves generated by the electro-acoustic assembly 20 can be transmitted from both sides of the outer frame into the sound-absorbing cavity 30, so that it is not necessary to provide a speaker space in the thickness direction of the electro-acoustic assembly 20, thereby reducing the need for sound. The thickness of the electro-acoustic component 20 is reduced, and the thickness of the electro-acoustic device 100 is reduced, so as to meet the current requirement for the thickness of mobile terminal products to be as thin as possible. Further, in this embodiment, the outer frame is a square ring, and the outer frame 21 of the square ring includes two opposite first side walls and two oppositely arranged second side walls connected with the first side walls. side wall, the first side wall is abutted against the side wall of the box body 10 , and the second side wall is spaced from the side wall of the box body 10 .

The diaphragm 22 is provided with folds between the periphery and the geometric center. The folds extend along the circumference of the diaphragm 22 . The wrinkles are used to reduce the tension of the diaphragm 22, so that the diaphragm 22 is more likely to generate deformation vibration in a region close to the geometric center. The periphery of the diaphragm 22 is fixedly connected to the outer frame 21 and is opposite to the bottom wall 11 of the box body. The material of the diaphragm 22 may be paper, fiber, metal, wool, silk, or the like. The diaphragm 22 vibrates to generate sound waves, so that the electroacoustic device 100 emits sound. In the present invention, when the electro-acoustic component 20 is installed in the box body 10, the diaphragm 22 is located at the position of the opening of the box body. By arranging the diaphragm 22 at the position of the opening, the sound waves emitted by the vibration of the diaphragm 22 are transmitted from the position of the opening, so that the sound of the electroacoustic device 100 can be transmitted. In addition, the diaphragm 22 covers and seals the side of the opening facing the inside of the box body 10 , so that the substances outside the box body 10 are not easy to enter the box body 10 and affect the electro-acoustic device. happened. Further, when the diaphragm 22 vibrates, part of the sound wave generated by the diaphragm 22 propagates in the outer frame 21 . In addition, the sound wave propagating in the outer frame 21 is transmitted into the sound absorbing cavity 30 through the leakage hole 211 on the outer frame 21, and the sound absorbing member 40 in the sound absorbing cavity 30 will transmit the sound wave. The sound waves in the sound-absorbing cavity 30 are absorbed, thereby preventing the sound waves propagating in the outer frame 21 from acting on the vibrating membrane 20, thereby improving the vibrating and sounding effect of the vibrating membrane 20, so that the The electroacoustic component 100 has a high vibration generating effect.

The driving components include a first driving component 23 and a second driving component 24 . The first driving component 23 is fixed on the diaphragm 22 , and the second driving component 24 is fixed on the bottom wall 11 of the box body 10 . The first driving member 23 can vibrate relative to the second driving member 24 to drive the vibrating film 22 to vibrate to emit sound waves. In this embodiment, the first driving member 23 is a coil, and the second driving member 24 is a magnet. Preferably, the second driving member is a permanent magnet. In addition, the second driving member 24 includes a first driving part 241 and a second driving part 242 . The first driving part 241 is disposed around the second driving part 242 and is spaced apart from the second driving part 242 . The first driving member 23 is located between the first driving part 241 and the second driving part 242 . The axial direction of the first driving member 23 is perpendicular to the plane of the diaphragm 22 , and the first driving member 23 is inserted into the first driving part 241 and the second driving part 242 along the axial direction between. When an electrical signal is passed to the first driving member 23, an electromagnetic force is generated between the first driving member 23 and the second driving member 24, so that the first driving member 23 is driven to generate an axial force. Vibration, and drive the diaphragm 22 to vibrate in a direction approximately perpendicular to the plane of the diaphragm 22, so that the diaphragm 22 can maximally drive the air around the diaphragm to vibrate when it vibrates, thereby generating a louder sound. At this time, a part of the sound emitted by the vibrating die 22 is transmitted through the opening on the box body 10 , and the other part is transmitted to the inside of the outer frame 21 , and is transmitted to the sound absorption through the leakage hole 211 in cavity 30. In this embodiment, the outer frame 21 is disposed close to the first driving part 241 to minimize the size of the electro-acoustic component 20, thereby reducing the size of the electro-acoustic device 100 to facilitate the The electroacoustic device 100 is assembled in a mobile terminal. In addition, in this embodiment, the leakage hole 211 penetrates through the outer frame 21 and through the first driving part 241 , so that the sound emission hole 211 communicates with the sound absorption cavity 30 and the inside of the outer frame 21 , so that The sound wave generated by the vibration of the diaphragm 22 is transmitted from the sound emission hole 211 to the sound absorption cavity 30 . It can be understood that, when the first driving portion 241 and the outer frame 21 are arranged at intervals, the openings 211 are only provided on the outer frame 21, thereby reducing the manufacturing process. Referring to FIG. 4 , in other embodiments of the present invention, the first driving member 23 may be a magnet, and the second driving member 24 may be a coil.

Please refer to FIG. 1 and FIG. 2 again, the sound-absorbing cavity 30 is disposed in the box body 10 and is formed by the bottom wall 11 , the bottom wall 12 , the side walls 13 and the outer frame 21 of the box body 10 . In addition, the sound-absorbing cavity 30 is provided on the side of the leakage hole 211 away from the electro-acoustic component 20 , and part of the sound waves emitted by the diaphragm 21 of the electro-acoustic component enter the sound-absorbing cavity 30 through the leakage hole 211 . Inside. At least one sound absorbing member 40 is provided in the sound absorbing cavity 30 . The sound absorbing member 40 is inserted into the sound absorbing cavity 30 from the socket 15 . The sound absorbing member 40 absorbs the sound waves generated by the diaphragm 22 and propagated in the outer frame 21, thereby preventing the sound waves in the outer frame 21 from affecting the vibration of the diaphragm 22, thereby ensuring Sound effect of the electro-acoustic device 100 . Referring to FIG. 5 , the sound-absorbing member 40 includes sound-absorbing particles and a casing 42 surrounding the sound-absorbing particles. The shell 42 is provided with mesh holes 43 arranged in an array, and the size of the mesh holes 43 is smaller than the particle size of the sound-absorbing particles, so as to prevent the sound-absorbing particles from leaking out of the shell 42 and at the same time. It can ensure that air and sound waves can propagate in the sound absorbing member 40 . The sound-absorbing particles are lightweight porous materials, and when sound waves propagate between the sound-absorbing particles, the energy of the sound waves will be converted into thermal energy of the sound-absorbing particles, so as to absorb the sound waves, thereby realizing the The good sounding effect of the electroacoustic device 100 is described. Moreover, due to the porous structure of the sound-absorbing particles, the virtual volume of the electro-acoustic device 100 can be increased, thereby obtaining a better bass effect. It can be understood that, according to different needs, the sound-absorbing particles can be made of different materials, such as foam particles, zeolite, activated carbon and the like.

In this embodiment, the casing 42 includes a forming frame 421 and a mesh spacer 422 fixed on the forming frame 421 . The mesh spacer 422 may be mesh cloth, metal mesh plate, plastic mesh plate, or the like. In this embodiment, the housing 42 and the sound absorbing cavity 30 have the same size and shape, that is, after the sound absorbing member 40 is inserted into the sound absorbing cavity 30, the mesh spacer 422 of the sound absorbing member 40 Fitted with the inner wall of the sound-absorbing cavity 30 . Therefore, it is ensured that the sound-absorbing cavity 30 is filled with the sound-absorbing particles to the maximum extent, so that when the sound wave propagating in the outer frame propagates into the sound-absorbing cavity 30, the sound-absorbing particles can absorb the sound wave. In order to ensure the sounding effect of the sounding device 100 . Further, the sound-absorbing member 40 is provided with a sealing portion 44 , and the sealing portion 44 is provided on the housing 42 . When the sound-absorbing member 40 is inserted into the sound-absorbing cavity 30 from the socket 15 , , the sealing portion 44 seals the socket 15 , so as to realize the sealing of the sound-absorbing cavity 30 and ensure the effect of the sound-emitting device 100 .

Please refer to FIG. 6 and FIG. 7 , in another embodiment of the present invention, each of the sound-absorbing chambers 30 is correspondingly provided with two sockets, and each of the sockets 15 is correspondingly inserted with one of the sound-absorbing members 40 . The sound absorbing members 14 abut against each other so as to fill the sound absorbing cavity 30 . It can be understood that, as required, each of the sound-absorbing chambers 30 is correspondingly provided with a plurality of sockets 15, and each of the sockets 15 is correspondingly inserted with one of the sound-absorbing members 40, so that the sound-absorbing The sound-absorbing cavity 30 is filled with the element 40 . In this embodiment, the particle size of the sound absorbing particles in the sound absorbing member 40 close to the outer frame 21 is larger than the particle size of the sound absorbing particles in the other sound absorbing members 40 of the plurality of sound absorbing members 40 . Therefore, the mesh aperture of the sound absorbing member 40 close to the outer frame can be larger than the mesh aperture of the other sound absorbing members 40 . Therefore, the influence of the mesh spacer on the air in and out of the leakage hole 211 can be reduced, and the sound-absorbing particles with large particle diameters are sparsely stacked, thereby further reducing the impact of the sound-absorbing member 40 on all the air. The influence of the air in and out of the leakage hole 211 is eliminated, thereby ensuring that the sound producing device 100 has a better sound producing effect.

Please refer to FIG. 8 and FIG. 9 , in another embodiment of the present invention, each of the sound absorbing chambers 30 is provided with only one socket 15 , and one sound absorbing member 40 is arranged in the socket 15 . The sound piece 40 is attached to the outer frame 21 and blocks the leakage hole 211 . There is a space between the sound-absorbing member 40 and the side wall 13 of the box body, and a filling cavity is formed between the sound-absorbing member 40 and the box body 10 , and the filling cavity is filled with sound-absorbing particles. In this embodiment, the particle size of the sound-absorbing particles in the filling cavity is smaller than the particle size of the sound-absorbing particles in the sound-absorbing member 40 . Therefore, the amount of sound-absorbing particles in the sound-absorbing cavity 30 can be increased as much as possible, so as to achieve a better sound-absorbing effect. Moreover, since the sound absorbing member 40 shields the leakage hole 211 , the sound absorbing particles in the filling cavity cannot enter the outer frame 21 , thereby ensuring the normal sound production of the sound emitting assembly 20 . At the same time, the particle size of the sound-absorbing particles in the sound-absorbing member 40 is made larger than the particle size of the sound-absorbing particles in the filling cavity, so as to increase the filling amount of the sound-absorbing particles in the sound-absorbing cavity 30, while avoiding the mesh partition The blocking of the leakage hole 211 further realizes that the sound producing device 100 has a better sound producing effect.

In the electroacoustic device 100 provided by the present invention, the socket 15 is provided on the box body 10 . When disposing the sound absorbing member 40 in the sound absorbing cavity, it is only necessary to insert the sound absorbing member 40 into the sound absorbing cavity 30 from the socket 15 , thereby simplifying the manufacturing process. In addition, by changing the number and position of the sockets 15 and the type of the sound absorbing member 40 inserted into the socket 15, the filling amount and filling position of the sound absorbing member 15 in the sound absorbing cavity 30 can be adjusted. And so on to make corresponding changes, can be more flexible to meet the needs of use. In addition, by changing the particle size of the sound-absorbing particles in different sound-absorbing members 40 or filling the sound-absorbing particles between the sound-absorbing member 40 and the housing 20, the leakage can be ensured while achieving a better sound-absorbing effect. The air flow at the position of the hole 211 is smooth, which ensures that the sounding device 100 has a better sounding effect.

Referring to FIG. 10 , the present invention further provides a mobile terminal 200 . The mobile terminal 200 includes a body and the electro-acoustic device 100 disposed in the body. The body includes a casing 90 and a main board 91 fixed in the casing 90 . The electroacoustic device 100 is fixed to the bottom end of the casing 90 . The first driving member 23 of the electroacoustic assembly 100 is electrically connected to the main board 91, receives the current signal of the main board 91, and then drives the diaphragm 22 to vibrate under the action of the second driving member 24, thereby The electroacoustic assembly 100 is made to sound. It can be understood that the mobile terminal 200 may be a mobile phone, a tablet computer, a notebook computer, or the like.

The above are the implementations of the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the embodiments of the present invention, several improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of the present invention.

Claims (13)

1. an electro-acoustic device, is characterized in that, comprises box body, the electro-acoustic component and the sound-absorbing cavity that are arranged in the box body, and at least one sound-absorbing part that is arranged in the described sound-absorbing cavity, and the described box body comprises a bottom wall , the top wall opposite the bottom wall and the side wall connecting the bottom wall and the top wall, the electro-acoustic assembly includes an outer frame fixed in the box body, a diaphragm provided in the outer frame, and the outer frame is provided with leakage A space is formed between the outer frame and the side wall of the box body, the top end of the outer frame is abutted and fixed on the top wall of the box body, and the bottom end of the outer frame is abutted and fixed On the bottom wall of the box body, the bottom wall, top wall, side wall and the outer frame of the box body are sealed and form a sound-absorbing cavity; the box body is provided with at least one socket, and the socket communicates with the a sound-absorbing cavity; each of the sound-absorbing members is inserted into the sound-absorbing cavity from one of the sockets, so that the sound-absorbing member fills the sound-absorbing cavity, and the diaphragm is located at the position of the opening of the box body , the sound wave emitted by the vibration of the diaphragm is transmitted from the position of the opening. When the diaphragm vibrates, part of the sound wave generated by the diaphragm propagates in the outer frame, and in the outer frame The sound waves propagating inside are transmitted into the sound-absorbing cavity through the leakage holes on the outer frame. The sound-absorbing member includes sound-absorbing particles and a shell that wraps the sound-absorbing particles. The sound-absorbing particles are lightweight porous materials. , when the sound wave propagates between the sound-absorbing particles, the sound-absorbing particles will convert the energy of the sound wave into the thermal energy of the sound-absorbing particles, so that the sound-absorbing member in the sound-absorbing cavity will transmit to the sound-absorbing The sound waves in the cavity are absorbed, so as to prevent the sound waves propagating in the outer frame from acting on the diaphragm, thereby improving the vibration sounding effect of the diaphragm. 2 . The electro-acoustic device according to claim 1 , wherein the housing is provided with mesh holes arranged in an array, and the aperture diameter of the mesh holes is smaller than the particle size of the sound-absorbing particles. 3 . 3 . The electro-acoustic device according to claim 2 , wherein the housing comprises a forming frame and a mesh spacer fixed on the forming frame, and the mesh spacer is attached to the inner wall of the sound-absorbing cavity. 4 . combine. 4 . The electro-acoustic device according to claim 2 , wherein the casing comprises a forming frame and a mesh spacer fixed on the forming frame, and the sound absorbing member is attached to the outer frame and shields it. 5 . the leakage hole, and a space is formed between the sound-absorbing member and the side wall of the box body, a filling cavity is formed between the sound-absorbing member and the box body, and the filling cavity is filled with sound-absorbing particles . 5 . The electro-acoustic device according to claim 4 , wherein the particle size of the sound-absorbing particles in the filling cavity is smaller than the particle size of the sound-absorbing particles in the sound-absorbing member. 6 . 6 . The electro-acoustic device according to claim 4 , wherein the sound absorbing member has an abutting surface abutting against the outer frame, and the aperture of the mesh on the abutting surface is smaller than that of the sound absorbing member. 7 . The particle size of the sound-absorbing particles in the piece. 7 . The electro-acoustic device according to claim 2 , wherein a sealing portion is provided on the housing of the sound absorbing member, and the sealing portion seals the socket. 8 . 8 . The electro-acoustic device according to claim 2 , wherein each of the sound-absorbing members is inserted into the sound-absorbing cavity from one of the sockets, and a plurality of the sound-absorbing members abut against each other and are fully filled. 9 . the sound-absorbing cavity. 9 . The electro-acoustic device according to claim 8 , wherein the sound absorbing member comprises a first sound absorbing member close to the outer frame, and a second sound absorbing member far away from the outer frame, the The diameter of the sound-absorbing particles of the first sound-absorbing part is larger than the diameter of the sound-absorbing particles of the second sound-absorbing part, and the aperture of the mesh on the shell of the first sound-absorbing part is larger than that of the second sound-absorbing part. The aperture of the mesh on the housing. 10. The electro-acoustic device according to claim 1, wherein the electro-acoustic assembly further comprises a driving assembly, and the periphery of the diaphragm is fixedly connected to the outer frame and is opposite to the bottom wall of the box body; The drive assembly is accommodated in the outer frame, the drive assembly includes a first drive member and a second drive member, the first drive member is fixed on the diaphragm, and the second drive assembly is fixed on the On the bottom wall of the box body, the first driving member vibrates relative to the second driving member to drive the vibrating membrane to vibrate and emit sound waves. 11 . The electro-acoustic device according to claim 1 , wherein the number of the leakage holes is plural, and a plurality of the leakage holes are arranged at intervals along the circumference of the outer frame. 12 . 12 . The electro-acoustic device according to claim 11 , wherein the sound-absorbing cavity is disposed around the electro-acoustic component, and each of the leakage holes communicates with the sound-absorbing cavity and the inside of the outer frame. 13 . 13. A mobile terminal, characterized in that the mobile terminal comprises a body and the electro-acoustic device according to any one of claims 1-12, wherein the electro-acoustic device is provided in the body.

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