WO2021128043A1

WO2021128043A1 - Loudspeaker capable of double-sided sound production

Info

Publication number: WO2021128043A1
Application number: PCT/CN2019/128196
Authority: WO
Inventors: 李巧玲; 高尚
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-07-01

Abstract

The present application provides a loudspeaker capable of double-sided sound production, comprising a first sound production structure, a second sound production structure, a first frame, and a second frame. The first sound production structure is used for producing sound toward a first direction; the second sound production structure is used for producing sound toward a second direction; the first frame and the second frame define a mounting cavity; the first sound production structure and the second sound production structure are mounted in the mounting cavity; welding portions are provided at corresponding positions of the first frame and the second frame; the first frame and the second frame are connected by laser welding the welding portions. According to the loudspeaker capable of double-sided sound production provided in the present application, the connection is reliable, the performance of the loudspeaker capable of double-sided sound production can be improved, the difficulty in mounting can be reduced, and the mounting efficiency can be improved.

Description

A double-sided sounding loudspeaker

Technical field

This application relates to the technical field of loudspeakers, in particular to a double-sided sound-emitting loudspeaker.

Background technique

The loudspeaker is a device that can convert electrical energy into sound energy. Generally, the conductive element (usually a voice coil) is energized to change the force of the conductive element in the magnetic field, so that the conductive element and the diaphragm are composed The system produces different degrees of vibration, and finally emits sounds of different frequencies.

technical problem

In order to achieve better sound effects in the prior art, speakers are generally designed to produce double-sided sound, that is, a double-sided sounding speaker. The double-sided generating speaker is equipped with two sets of conductive elements and diaphragms, and the two sets of conductive elements each play a role. They are matched with a diaphragm respectively, so as to achieve the purpose of making the speakers have better sound effects. Since the double-sided sounding speaker is provided with two sets of functional elements (the aforementioned conductive element and diaphragm), it is difficult to connect and install. Usually the two sets of functional elements are connected by glue, but this way It is easy to cause the connection to be unreliable, affect the overall performance of the double-sided sounding speaker, and the installation process is complicated and the installation efficiency is not high.

Technical solutions

The purpose of this application is to provide a double-sided sounding speaker to solve the problems of unreliable connection and low installation efficiency of the double-sided sounding speaker in the prior art.

The technical solution of this application is as follows:

A double-sided generating speaker, including:

The first sounding structure is used for sounding toward the first direction;

The second sounding structure is used for sounding toward the second direction;

A first frame and a second frame, the first frame and the second frame are enclosed to form a mounting cavity, the first sounding structure and the second sounding structure are installed in the mounting cavity, and the first The frame and the second frame are provided with welding parts at corresponding positions, and the first frame and the second frame are connected by laser welding the welding parts.

As a further alternative of the double-sided sound-emitting speaker, a first welding sheet is provided on the surface of the first frame, and a second welding sheet is provided on the surface of the second frame. The first welding sheet and The welding part is formed on the second welding piece.

As a further alternative of the double-sided sounding speaker, a first welding sheet is arranged inside the first frame, a second welding sheet is arranged inside the second frame, and at least one end of the first welding sheet Extend the first frame to form a first protruding end, at least one end of the second welding piece protrudes from the second frame to form a second protruding end, at least one of the first protruding end It is arranged opposite to at least one of the second extension ends to form the welding part.

As a further alternative of the double-sided sounding speaker, the first frame is formed with a convex column, the second frame is formed with a notch, and the first extension end extends beyond the convex column, so The second protruding end is located in the gap, and the protruding column can be inserted into the gap, so that the first protruding end is in contact with the second protruding end.

As a further alternative of the double-sided sounding speaker, the first frame and the second frame are both constructed into a hollow rectangular parallelepiped structure, the protruding columns are arranged at four corners of the first frame, and the Notches are provided at the four corners of the second frame.

As a further alternative of the double-sided sounding speaker, both ends of the first welding piece extend out of the first frame, and two first extending ends are formed, and the second welding piece Both ends of the two protrude from the second frame and form two second protruding ends, one of the two first protruding ends forms the welding part, and the other forms the first test point One of the two second extension ends forms the welding part, and the other forms the second test point.

As a further alternative of the double-sided sounding speaker, the first sounding structure includes a first circuit, the second sounding structure includes a second circuit, and the first welding sheet and the second welding sheet are arranged on Between the first circuit and the second circuit, and the first circuit and the second circuit are connected through the connection of the welding part.

As a further alternative of the double-sided sounding speaker, the first sounding structure further includes a first magnetic circuit system, a first sound film, and a first voice coil, and the first voice coil is movably arranged on the first In the magnetic field of the magnetic circuit system, the first sound film is covered on the first frame; the second sound generating structure further includes a second magnetic circuit system, a second sound film, and a second voice coil. Two voice coils are movably arranged in the magnetic field of the second magnetic circuit system, and the second sound film is covered on the second frame.

As a further alternative to the double-sided sounding speaker, the first magnetic circuit system includes a first central magnet and two side magnets located on both sides of the first central magnet, and the second magnetic The circuit system includes a magnetic frame and a second central magnetic steel. The magnetic frame includes a top wall, side walls extending downward from both sides of the top wall, and a bottom wall extending outward from the side walls. Two central magnets and the first central magnet are placed on both sides of the top wall, and the two side magnets are arranged oppositely and sandwiched between the first frame and the second frame, respectively , And the side magnetic steel is pressed on the top of the bottom wall.

As a further alternative to the double-sided sounding speaker, the first sounding structure further includes a first circuit board, and the second sounding structure further includes a second circuit board, and the first circuit board forms the first circuit board. Circuit, the second circuit board forms the second circuit.

As a further alternative to the double-sided speaker, the first sound-producing structure further includes a third sound film, the third sound film and the first sound film are arranged oppositely, and the third sound film is opposite to the first sound film. The first circuit board is attached and arranged.

Beneficial effect

The beneficial effects of the present application are: because the first sounding structure and the second sounding structure are installed in the installation cavity formed by the first frame and the second frame, and the first frame and the second frame are welded due to the existence of the first frame and the second frame. A connection is formed between the first frame and the second frame through the laser welding welding part, and the connection is reliable, and the performance of the double-sided sounding speaker can be improved, and at the same time, the installation difficulty can be reduced and the installation efficiency can be improved.

Description of the drawings

FIG. 1 is a schematic structural diagram of a double-sided sounding speaker provided by an embodiment of the application;

FIG. 2 is a schematic structural diagram from another angle of a double-sided sound emitting speaker provided by an embodiment of the application; FIG.

FIG. 3 is an exploded schematic diagram of a double-sided sounding speaker provided by an embodiment of the application;

4 is an exploded schematic diagram of a first frame of a double-sided sounding speaker provided by an embodiment of the application;

FIG. 5 is an exploded schematic diagram of a second frame of a double-sided sounding speaker provided by an embodiment of the application;

6 is a cross-sectional view along the length of a double-sided sounding speaker provided by an embodiment of the application;

FIG. 7 is a cross-sectional view along the width direction of a double-sided sound emitting speaker provided by an embodiment of the application;

FIG. 8 is a schematic diagram of the connection between the first circuit and the second circuit of a double-sided sound emitting speaker provided by an embodiment of the application;

FIG. 9 is a cross-sectional view of a double-sided sound emitting speaker provided by an embodiment of the application along the width direction and passing through the first welding sheet and the second welding sheet.

Embodiments of the present invention

The application will be further described below in conjunction with the drawings and implementations.

In the embodiment of the present application, a double-sided sound emitting speaker is provided, and the double-sided sound emitting speaker is redesigned to meet the conditions of laser welding.

Please refer to FIGS. 1-2, the double-sided sounding speaker includes a first sounding structure 100, a second sounding structure 200, a first frame 300, and a second frame 400.

Among them, the first sound emitting structure 100 is used to emit sound in a first direction, and the second sound emitting structure 200 is used to emit sound in a second direction. The first sound emitting structure 100 and the second sound emitting structure 200 can be designed and manufactured in a conventional manner. Designed as a plane sounding structure, it can also be designed as a horn sounding structure, and the first direction and the second direction can be set according to requirements. As a preferred solution, the first direction and the second direction are two directions that deviate from each other, in other words , The double-sided sounding speaker can sound in the opposite direction.

The first frame 300 and the second frame 400 are enclosed to form an installation cavity, the first sound emitting structure 100 and the second sound emitting structure 200 are installed in the installation cavity, and the corresponding positions of the first frame 300 and the second frame 400 are provided with a welding part A , The first frame 300 and the second frame 400 are connected by the laser welding welding part A.

In the embodiment of the present application, the first sound emitting structure 100 and the second sound emitting structure 200 are installed in the installation cavity enclosed by the first frame 300 and the second frame 400, and the first frame 300 and the second frame 400 are due to the welding part A With the existence of, the first frame 300 and the second frame 400 are connected by laser welding welded part A. The connection is reliable and the performance of the double-sided sounding speaker can be improved. At the same time, the installation difficulty can be reduced and the installation efficiency can be improved.

In an embodiment, please refer to FIGS. 3-5, the first frame 300 is provided with a first welding piece 500, and the second frame 400 is provided with a second welding piece 600, and at least the first welding piece 500 One end protrudes from the first frame 300 and forms a first protruding end 510, at least one end of the second welding piece 600 protrudes from the second frame 400 and forms a second protruding end 610, at least one first protruding end 510 It is arranged opposite to at least one second extension end 610 to form a welding part A.

Thus, the first extension end 510 and the second extension end 610 provide the basis for laser welding. When the first frame 300 and the second frame 400 are connected together, the first extension end is made by laser welding. The end 510 and the second protruding end 610 can be connected together.

Specifically, a connecting surface is formed between the first frame 300 and the second frame 400, and at least one end of the aforementioned first welding piece 500 and the second welding piece 600 should be able to protrude from the connecting surface, so that the first frame 300 and the second frame 400 can be combined to form a connecting surface.

It should be noted that the aforementioned first protruding end 510 and second protruding end 610 protruding from the connecting surface should be evenly distributed on the outer peripheries of the first frame 300 and the second frame 400 in the circumferential direction, respectively. After laser welding, the connection reliability of the first frame 300 and the second frame 400 can be improved.

In some embodiments, in order to improve the reliability of the connection, the other end of the first welding piece 500 and the second welding piece 600 may also protrude from the connection surface, so that more connection points can be increased to increase the first The welding area between the frame 300 and the second frame 400.

In some embodiments, the other ends of the first welding piece 500 and the second welding piece 600 may also be hidden in the first frame 300 and the second frame 600, respectively.

In some embodiments, the other ends of the first welding piece 500 and the second welding piece 600 also protrude from the first frame 300 and the second frame 400 respectively, but the direction in which they protrude is the same as the aforementioned extending from the connecting surface. Take the first welding piece 500 as an example. For example, the other end of the first welding piece 500 extends in a direction opposite to the end protruding from the connecting surface to form another first extending end 510. However, the other first protruding end 510 is not used for welding, it can be used as the first test point C for the user or for testing at the factory. Similarly, the other end of the second welding piece 600 can also protrude in the direction opposite to the end protruding from the connection surface to form another second protruding end 610, which can be Used as the second test point D.

In order to more clearly describe the arrangement and use of the first welding piece 500 and the second welding piece 600, a first frame 300 and a second frame 400 having a specific structure are now taken as an example for description.

Please refer to FIGS. 3-5, the first frame 300 is formed with a protruding column 310, the second frame 400 is formed with a notch 410, the first protruding end 510 extends out of the protruding column 310, and the second protruding end 610 is located in the notch In 410, the protrusion 310 can be inserted into the notch 410 so that the first extension end 510 and the second extension end 610 are in contact with each other.

In combination with the foregoing, the connecting surface of the first frame 300 and the second frame 400 at this time is formed by the protrusion 310 and the notch 410. In other words, the protrusion 310 is inserted into the notch 410 to form the connecting surface. A protruding end 510 and a second protruding end 610 protrude from the connecting surface.

Further, both the first frame 300 and the second frame 400 are configured as a hollow rectangular parallelepiped structure, the protruding posts 310 are arranged at the four corners of the first frame 300, the gaps 410 are arranged at the four corners of the second frame 400, and the first frame 300 After being stacked and combined with the second frame 400, an installation cavity is formed.

In order to be compatible with the first frame 300 and the second frame 400 of this type of structure, at least one end of the first welding piece 500 protrudes from the lower surface of the boss 310 to form a first protruding end 510 as a welding part A (Take the first frame 300 and the second frame 400 to form an upper and lower structure as an example. When the first frame 300 and the second frame 400 are described below as an example, refer to the upper and lower structure), the second welding piece 600 At least one end protrudes from the notch 410 to form the second protruding end 610 as the welding part A, so that the first frame 300 can be connected based on the welding of the first protruding end 510 and the second protruding end 610.

The other end of the first welding piece 500 may protrude from the lower surface of the protruding column 310, or protrude from the upper surface of the protruding column 310 or other positions, and can also be hidden in the first frame 300. The other end of the second welding piece 500 can protrude from the notch 410, can also protrude from other positions, and can also be hidden in the second frame 400.

Taking the two ends of the first welding piece 500 respectively protruding from the upper and lower surfaces of the boss 310, and the two ends of the second welding piece 600 respectively extending from the notch 410 as an example, the first welding piece 500 is designed as It has a certain height in the vertical direction, which can be slightly higher than the height of the boss 310 of the first frame 300, and the second welding piece 500 is designed to have a certain length in the horizontal direction, and its length can be slightly longer than that of the second frame The length of 400. For the first frame 300 at this time, the upper and lower surfaces of the protruding pillars 310 at the four corners each have a first extension 510, and the first extension 510 on the lower surface is a welding part A for Participate in the welding work, the first protruding end 510 on the upper surface is used as the first test point C; for the second frame 400, there is a second protruding end 610 at each of the notches 410 at the four corners, and the second All or part of the extension end 610 is the welding part A for participating in the welding work, and the other second extension end 610 not participating in the welding work is used as the second test point D.

Of course, in other embodiments, the protrusions 310 and the notches 410 may also be arranged in other positions, and at the same time, the protrusions 310 and the notches 410 may also be set to more, so as to further improve the connection between the first frame 300 and the second frame 400 reliability.

On the other hand, the first frame 300 and the second frame 400 do not have to be hollow rectangular parallelepiped structures. It should be understood that when the first frame 300 and the second frame 400 have other shapes, the aforementioned protrusions 310 and notches 410 may be provided in these Other shapes of the first frame 300 and the second frame 400 are used.

The foregoing description mainly takes the first welding piece 500 arranged in the first frame 300 and the second welding piece 600 arranged in the second frame 400 as an example. At this time, the first frame 300 and the second frame 300 can be manufactured by integral injection molding. Two frame 400. In other embodiments, the first welding piece 500 may be arranged on the surface of the first frame 300, and the second welding piece 600 may be arranged on the surface of the second frame 400, and the first welding piece 500 and the second welding piece 600 may be welded. Department A.

Specifically, taking the aforementioned first frame 300 and second frame 400 with a hollow rectangular parallelepiped structure as an example, it is entirely possible to attach the first welding sheet 500 to the surface of the first frame 300 facing the second frame 400, that is, the first frame 300 On the lower surface of a frame 300, the second welding piece 600 can be attached to the surface of the second frame 400 facing the first frame 300, that is, the upper surface of the second frame 400. At this time, the first welding piece 500 and the second A required welding part A may be arranged on the welding sheet 600 to realize the welding of the first frame 300 and the second frame 400.

Please refer to FIGS. 1-3 and 6-7 in combination, the first sound emitting structure 100 includes a first circuit 110, the second sound emitting structure 200 includes a second circuit 210, and the first soldering piece 500 and the second soldering piece 600 are arranged on the first Between the circuit 110 and the second circuit 210, and the first circuit 110 and the second circuit 210 are connected through the connection of the welding part A.

Following the foregoing, in some embodiments, the first circuit 110 is disposed at the bottom of the first frame 300 and at both ends, the second circuit 210 is disposed at the bottom of the second frame 400, and the first soldering piece 500 is connected to the second frame 400. A circuit 110 is connected, and at the same time, the first soldering piece 500 can be connected to the second soldering piece 600 by soldering, and the second soldering piece 600 can be connected to the second circuit 210 by layer by layer connection. The first circuit 110 and the second circuit 210 are connected.

Specifically, referring to FIGS. 3 and 8-9, the first soldering piece 500 penetrates the upper and lower surfaces of the first frame 300, the second soldering piece 600 penetrates the left and right ends of the second frame 400, and the first circuit 110 and The second circuit 210 is arranged in parallel, the first soldering piece 500 has a bent fitting portion 520 that is attached to the first circuit 110, the second soldering piece 600 is extended with an extension end 620 that is attached to the second circuit 210, and the first The soldering piece 500 and the second soldering piece 600 themselves are connected together, so that the connection of the first circuit 110 and the second circuit 210 can be realized.

In some specific embodiments, the first sound emitting structure 100 further includes a first circuit board, and the second sound emitting structure 200 further includes a second circuit board. The first circuit board forms the first circuit 110, and the second circuit board forms the second circuit board. Circuit 210.

Please continue to refer to FIGS. 1-3 and 6-7 in combination. The first sound emitting structure 100 also includes a first magnetic circuit system 120, a first sound film 130, and a first voice coil 140. The first voice coil 140 is movably arranged at the first In the magnetic field of the magnetic circuit system 120, the first sound film 130 is arranged on the first frame 300; the second sound generating structure 200 further includes a second magnetic circuit system 220, a second sound film 230, and a second voice coil 240. The voice coil 240 is movably arranged in the magnetic field of the second magnetic circuit system 220, and the second sound film 230 is covered on the second frame 400.

Taking the aforementioned first frame 300 and second frame 400 having a hollow rectangular parallelepiped structure as an example, specifically, the first magnetic circuit system 120 includes a first pole core 123, and the first voice coil 140 is a rectangular parallelepiped frame structure. And it is arranged on the outer circumference of the first magnetic circuit system 120, so that the first voice coil 140 can be subjected to the magnetic field of the first magnetic circuit system 120 to vibrate, and the first sound film 130 is arranged on the upper surface of the first frame 300 , And above the first voice coil 140, at this time, the first voice coil 140 vibrates to cause the first sound film 130 to vibrate, thereby emitting sound toward the first direction. The second magnetic circuit system 220 includes a second pole core 223 whose polarity is opposite to that of the aforementioned first pole core 123. The second voice coil 240 is a rectangular parallelepiped frame structure and is arranged on the outer periphery of the second magnetic circuit system 220, so that The second voice coil 240 can be subjected to the magnetic field of the second magnetic circuit system 220 to vibrate. The second sound film 230 is covered on the lower surface of the second frame 400 and is located below the second voice coil 240. The vibration of the second voice coil 240 can cause the second sound membrane 230 to vibrate, thereby emitting sound in the second direction.

Specifically, please refer to FIGS. 3 and 6-7. The first magnetic circuit system 120 includes a first central magnet 121 and two side magnets 122 located on both sides of the first central magnet 121. The second magnetic circuit The system 220 includes a magnetic frame 221 and a second central magnet 222. The magnetic frame 221 includes a top wall 2211, side walls 2212 extending downward from both sides of the top wall 2211, and a bottom wall 2213 extending outward from the side walls 2212. The two central magnets 222 and the first central magnet 121 are respectively placed on both sides of the top wall 2211, and the two side magnets 122 are oppositely arranged and sandwiched between the first frame 300 and the second frame 400, and the side magnets The steel 122 is pressed on the top of the bottom wall.

In addition, in order to ensure the stability of the vibration of the first voice coil 140 and the second voice coil 240, the double-sided sounding speaker further includes a limiting structure 700, which is arranged on the first voice coil 140 and the second voice coil 240. Peripheral.

In an embodiment, for example, taking the aforementioned first frame 300 and second frame 400 as an example, the first frame 300 is provided with its protruding pillars 310 so that after the first frame 300 and the second frame 400 are connected, they A gap S will be formed (please refer to Figure 1-2). At this time, the gap S can be fully utilized to set the limit structure 700. For example, the limit structure 700 can be formed of side magnets 122, which are arranged along the length direction. Between the first frame 300 and the second frame 400, the inner side thereof extends to abut against the outer walls of the first voice coil 140 and the second voice coil 240, thereby completing the position limiting function.

Further, in order to enhance the limiting effect and protect the side magnet 122, a limit piece 710 can be provided on the side magnet 122, and the limit piece 710 can be integrally injection molded with the bottom frame 300 or the second frame 400, For example, in the example shown in FIG. 4, 710 and the first frame 300 are integrally formed.

Of course, in other embodiments, for example, after the first frame 300 and the second frame 400 are connected, there is no gap between them, the structure of the first frame 300 and the second frame 400 can be improved. , So that the inner side can directly abut against the outer walls of the first voice coil 140 and the second voice coil 240.

On the other hand, in order to enhance the sound effect, please refer to FIG. 3. The first sound-producing structure 100 further includes a third sound film 150, the third sound film 150 and the first sound film 130 are arranged oppositely, the third sound film 150 and the first circuit board Fit the settings.

It can be understood that the third sound film 150 follows the first circuit board and is located at the two ends of the bottom of the first frame 300. At this time, combined with the function of the aforementioned side magnet 122, the first voice coil 140 can be restricted in all directions. .

In the same way, the second sound-producing structure 200 may also include a fourth sound film (not shown in the figure), and the specific setting means can refer to the aforementioned third sound film 150, which will not be repeated.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Claims

A double-sided sounding speaker, which is characterized in that it comprises:

The first sounding structure is used for sounding toward the first direction;

The second sounding structure is used for sounding toward the second direction;

A first frame and a second frame, the first frame and the second frame are enclosed to form a mounting cavity, the first sounding structure and the second sounding structure are installed in the mounting cavity, and the first The frame and the second frame are provided with welding parts at corresponding positions, and the first frame and the second frame are connected by laser welding the welding parts.
The double-sided sounding speaker according to claim 1, wherein a first welding sheet is provided on the surface of the first frame, a second welding sheet is provided on the surface of the second frame, and the first welding sheet is provided on the surface of the second frame. The welding part is formed on the welding piece and the second welding piece.
The double-sided sounding speaker according to claim 1, wherein a first welding sheet is arranged inside the first frame, a second welding sheet is arranged inside the second frame, and the first welding sheet At least one end of the second welding piece protrudes from the first frame and forms a first protruding end, at least one end of the second welding piece protrudes from the second frame and forms a second protruding end, at least one of the first The protruding end and at least one of the second protruding ends are arranged opposite to each other to form the welding part.
The double-sided sounding speaker according to claim 3, wherein the first frame is formed with a protruding column, the second frame is formed with a notch, and the first extension end protrudes from one of the protruding columns. In addition, the second protruding end is located in the gap, and the protrusion can be inserted into the gap, so that the first protruding end is in contact with the second protruding end.
The double-sided sounding speaker according to claim 4, wherein the first frame and the second frame are both constructed as a hollow rectangular parallelepiped structure, and the protruding columns are arranged at four corners of the first frame , The notches are arranged at the four corners of the second frame.
The double-sided sounding speaker according to claim 3, wherein both ends of the first welding sheet extend out of the first frame, and two first extension ends are formed, and the first extension ends are formed. Both ends of the two welding pieces protrude from the second frame and form two second protruding ends, one of the two first protruding ends forms the welding part, and the other forms the first For a test point, one of the two second extension ends forms the welding part, and the other forms a second test point.
The double-sided sounding speaker according to claim 3, wherein the first sounding structure includes a first circuit, the second sounding structure includes a second circuit, and the first welding sheet and the second welding The sheet is arranged between the first circuit and the second circuit, and the first circuit and the second circuit are connected by the connection of the welding part.
The double-sided sounding speaker according to claim 7, wherein the first sounding structure further comprises a first magnetic circuit system, a first sound film and a first voice coil, and the first voice coil is movably arranged at the In the magnetic field of the first magnetic circuit system, the first sound film is covered on the first frame; the second sound emitting structure further includes a second magnetic circuit system, a second sound film, and a second voice coil, The second voice coil is movably arranged in the magnetic field of the second magnetic circuit system, and the second sound film is covered on the second frame.
The double-sided sounding speaker according to claim 8, wherein the first magnetic circuit system comprises a first central magnet and two side magnets located on both sides of the first central magnet, and The second magnetic circuit system includes a magnetic frame and a second central magnet. The magnetic frame includes a top wall, side walls extending downward from both sides of the top wall, and a bottom wall extending outward from the side walls, The second central magnet and the first central magnet are separately placed on both sides of the top wall, and the two side magnets are arranged oppositely and sandwiched between the first frame and the second frame. Between the frames, and the side magnetic steel is pressed on the upper side of the bottom wall.
The double-sided sounding speaker according to claim 8, wherein the first sounding structure further comprises a first circuit board, the second sounding structure further comprises a second circuit board, and the first circuit board forms a The first circuit and the second circuit board form the second circuit.
The double-sided sounding speaker according to claim 9, wherein the first sounding structure further comprises a third sound film, the third sound film and the first sound film are arranged oppositely, and the third sound film The film is attached to the first circuit board.