WO2020181892A1

WO2020181892A1 - Sound production apparatus and electronic device

Info

Publication number: WO2020181892A1
Application number: PCT/CN2019/129732
Authority: WO
Inventors: 王兴龙; 李�杰
Original assignee: 歌尔股份有限公司
Priority date: 2019-03-14
Filing date: 2019-12-30
Publication date: 2020-09-17
Also published as: CN111698617A

Abstract

The present invention relates to a sound production apparatus and an electronic device. The sound production apparatus comprises a magnetic circuit system, and a first vibration system and a second vibration system located on both surfaces of the magnetic circuit system. The magnetic circuit system comprises a central magnet located in the middle. A first magnetic gap for allowing a first voice coil of the first vibration system to extend is formed on one surface of the magnetic circuit system. A second magnetic gap for allowing a second voice coil of the second vibration system to extend is formed on the other surface of the magnetic circuit system. The first magnetic gap and the second magnetic gap are located at an outer side of the central magnet. The first magnetic gap is distant from the central magnet. At least the first vibration system further comprises a first diaphragm and a connection piece having a folding ring. The first diaphragm is located on one end of the first voice coil distant from the magnetic circuit system. The connection piece is connected onto a bottom end of the first voice coil facing towards the magnetic circuit system to limit the first voice coil to vertically vibrate in the direction perpendicular to the first magnetic gap.

Description

Sound generating device and electronic equipment

Technical field

The present invention belongs to the technical field of acoustic-electric energy conversion. More specifically, the present invention relates to a sound generating device and electronic equipment.

Background technique

Micro speakers are a kind of transducer device that converts electrical signals into acoustic signals. It produces sound by vibrating the diaphragm and resonating with the surrounding air. Traditional micro speakers usually consist of a vibration system, a magnetic circuit system, and a support system; the vibration system usually includes a diaphragm, dome, voice coil, etc. The magnetic circuit system usually includes a washer, a basin frame and several magnets, and the support system usually includes a housing and shrapnel And other inserts, etc.

In the prior art, in order to meet the needs of improving the acoustic performance of the market, the performance is generally improved by increasing the vibration area and working amplitude of the product; however, the increase in the vibration area will lead to an increase in product size and affect the application of the whole machine. A further increase in the working amplitude will bring about quality problems in all aspects.

Summary of the invention

An object of the present invention is to provide a new technical solution for a sound generating device.

According to one aspect of the present invention, a sound generating device is provided, which includes a magnetic circuit system and a first vibration system and a second vibration system respectively located on two sides of the magnetic circuit system;

The magnetic circuit system includes a central magnet in the middle, one side of the magnetic circuit system forms a first magnetic gap into which the first voice coil of the first vibration system extends, and the other side of the magnetic circuit system forms a supply A second magnetic gap into which the second voice coil of the second vibration system extends, where the first magnetic gap and the second magnetic gap are located outside the central magnet;

At least the first vibration system further includes a first diaphragm and a connecting piece with a folded ring. The first diaphragm is located at an end of the first voice coil away from the magnetic circuit system, and the connecting piece is connected to the The bottom end of the first voice coil facing the magnetic circuit system restricts the first voice coil from vibrating vertically in a direction perpendicular to the first magnetic gap.

Optionally, the convex direction of the folding ring on the connecting piece and the folding ring on the first diaphragm are the same or opposite.

Optionally, the folding ring on the connecting piece protrudes upward or downward along the vibration direction of the first voice coil.

Optionally, the position of the folding ring on the connecting piece is opposite to the position of the folding ring on the diaphragm.

Optionally, the first vibration system further includes a first centering support piece, the top end of the first voice coil is connected to the first centering support piece, and the first diaphragm is connected to the first centering support piece. The centering piece is away from the side of the first voice coil.

Optionally, the second vibration system further includes a second diaphragm and a second centering support piece, and an end of the second voice coil facing away from the magnetic circuit system is connected to the second centering support piece, so The second diaphragm is connected to a side of the second centering branch away from the second voice coil.

Optionally, the first magnetic gap and the second magnetic gap are alternately arranged, and the first magnetic gap is away from the central magnet.

Optionally, the magnetic circuit system further includes a magnetically conductive yoke, a side magnet, a center washer and a side washer, and the magnetically conductive yoke includes a frame portion with a hollow area and a frame that is opposite to and higher than the hollow area. In the middle part of the frame body part, there is a gap between the central part and the frame body part, and at least two opposite ends of the central part are fixedly connected to the frame body part by connecting walls;

The frame portion of the magnetic yoke is sequentially provided with side magnets and side washers, and the side washers and the central portion of the magnetic yoke have a first magnetic gap; the central portion of the magnetic yoke is arranged downwards in sequence A center magnet and a center washer, the center washer and the frame of the magnetic yoke form a second magnetic gap into which the second voice coil of the second vibration system extends, and the first magnetic gap and The second magnetic gap is located between the center magnet and the side magnets.

Optionally, the magnetic circuit system includes a plurality of side magnets, the plurality of side magnets are symmetrically arranged on the outer side of the center magnet, and the connecting piece prevents the side magnet from being connected to the first voice coil.

Optionally, the magnetic circuit system is rectangular or round, the central magnet is a corresponding rectangle or round, the connecting wall is located on the short axis end of the magnetic circuit system, and the connecting wall is connected to On the inner edge of the frame, the first voice coil is located outside the connecting wall, the side magnets are arranged on the long axis of the magnetic circuit system, and the connecting piece faces the magnetic circuit The short axis of the system protrudes and is connected to one end of the first voice coil.

Optionally, the first vibration system includes a plurality of connecting pieces, and the plurality of connecting pieces are symmetrically connected to the first voice coil.

Optionally, it further includes a first housing assembly and a second housing assembly, the first housing assembly and the second housing assembly are respectively arranged on both sides of the magnetic circuit system, the side washer and the The first diaphragm and the connecting piece of the first vibration system are fixed to the first housing assembly; the frame portion of the magnetic yoke and the second vibration system are fixed to the second housing assembly, the The side of the side magnet away from the center magnet is exposed.

According to another aspect of the present invention, the present invention also provides an electronic device, including the above-mentioned sound generating device with a housing provided in the housing.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings constituting a part of the specification describe the embodiments of the present invention, and together with the specification are used to explain the principle of the present invention.

Fig. 1 is a schematic diagram of the external structure of some embodiments of the present invention.

Fig. 2 is a schematic structural view of the A-A section in Fig. 1.

Fig. 3 is an enlarged schematic diagram of the partial structure at C in Fig. 2.

Fig. 4 is a schematic structural view of the B-B section in Fig. 2.

Figure 5 is an exploded schematic view of some embodiments of the present invention.

Fig. 6 is a schematic diagram of the structure of a magnetic yoke in some embodiments of the present invention.

FIG. 7 is another view of the structure of the magnetic yoke in some embodiments of the present invention.

Fig. 8 is a partial structural diagram of some embodiments of the present invention.

Fig. 9 is a schematic structural view of other embodiments of the present invention.

Fig. 10 is a schematic structural view of the D-D section in Fig. 9.

In the picture: 1 magnetic circuit system, 11 magnetic yoke, 12 center part, 13 frame body part, 14 center magnet, 15 side magnet, 16 center washer, 17 side washer, 18 first magnetic gap, 19 second magnet Gap, 2 first vibration system, 21 first voice coil, 22 first diaphragm, 23 connecting piece, 24 first reinforcement, 25 first centering piece, 3 second vibration system, 31 second voice coil , 32 second diaphragm, 33 second centering support piece, 34 second reinforcing part, 4 first housing assembly, 5 second housing assembly.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement, numerical expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technology and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technology and equipment should be regarded as part of the specification.

In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

According to one aspect of the present invention, a sound generating device provided by the present invention, in some embodiments, referring to FIGS. 1 to 5, includes a magnetic circuit system 1, a first vibration system 2 and a second vibration system 3. The first vibration system 2 and the second vibration system 3 are respectively located on the top surface and the bottom surface of the magnetic circuit system 1, and the magnetic circuit system 1 is used to drive the first vibration system 2 and the second vibration system 3 to vibrate and produce sound.

One side of the magnetic circuit system 1 forms a first magnetic gap 18 into which the first voice coil 21 of the first vibration system 2 extends. When the first voice coil 21 is connected to an electrical signal, the magnetic circuit system 1 can drive the first sound. The ring 21 vibrates to drive the first vibration system 2 to vibrate and produce sound. The other side of the magnetic circuit system 1 forms a second magnetic gap 19 into which the second voice coil 31 of the second vibration system 3 extends. When the second voice coil 31 is connected to an electrical signal, the magnetic circuit system 1 can drive the second The voice coil 31 vibrates to drive the second vibration system 3 to vibrate and produce sound. The magnetic circuit system 1 includes a central magnet 14 located in the middle, and a first magnetic gap 18 and a second magnetic gap 19 are located outside the central magnet 14.

At least the first vibration system 2 further includes a first diaphragm 22 and a connecting piece 23. The first diaphragm 22 is located at an end of the first voice coil 21 away from the magnetic circuit system 1. The connecting piece 23 has a folding ring structure, the two ends of the connecting piece 23 extend horizontally outward, and the folding ring is located between the two ends. One end of the connecting piece 23 is fixed in the sound generating device, and the other end is connected to the bottom end of the first voice coil 21 facing the magnetic circuit system 1, so that both the upper and lower ends of the first voice coil 21 are supported. The folding ring and the folding ring on the first diaphragm 22 restrict the first voice coil 21 to vibrate vertically in the direction perpendicular to the first magnetic gap 18, so that the vibration balance of the first vibration system 2 is better, and the optimization can be achieved. Acoustic performance.

The structural design of this application makes this application only need one set of magnetic circuit system to drive two sets of vibration systems to vibrate and produce sound, and can obtain higher acoustic performance under relatively small size and amplitude; small size can adapt to different The structure of the whole machine model has a wider range of applications; small amplitude can reduce product reliability risks. In addition, when the traditional speaker works, it will cause the whole machine to vibrate, which will seriously affect the whole machine experience; while the two-way sounding device described in this patent, due to the reverse vibration of the vibration system on both sides, can significantly offset the whole machine vibration problem. When in use, the same or different electrical signals can be input to the first voice coil and the second voice coil to obtain different acoustic performance. In the double-sided speaker, both ends of at least one voice coil can be simultaneously supported, so that the vibration balance of the at least one vibration system is better, and the influence of polarization on the acoustic performance is reduced.

In some embodiments, referring to FIG. 3, the convex direction of the folding ring on the connecting piece 23 is the same as the convex direction of the folding ring on the first diaphragm 22, so that the amplitude and force applied during the vibration are the same, and will not be Interference occurs during vibration, which is convenient for design. In some other embodiments, referring to FIG. 10, the convex directions of the folding ring on the connecting piece 23 and the folding ring on the first diaphragm 22 may also be opposite, which is not limited in the present application.

In some embodiments, referring to FIG. 3, the folding ring on the connecting piece 23 protrudes upward along the vibration direction of the first voice coil 21. In some other embodiments, referring to FIG. 10, the folding ring on the connecting piece 23 may also protrude downward along the vibration direction of the first voice coil 21, which is not limited in the present application.

In some embodiments, referring to FIG. 3, the folding ring on the first diaphragm 22 protrudes upward. In some other embodiments, the folding ring on the first diaphragm 22 may also protrude downward to reduce the overall size of the sound emitting device.

In some embodiments, referring to FIG. 3, the position of the folding ring on the connecting piece is opposite to the position of the folding ring on the diaphragm, so that the vibration process of the folding ring on the connecting piece 23 and the folding ring on the first diaphragm 22 can be kept consistent. .

In some embodiments, referring to FIGS. 9 and 10, the first vibration system 2 further includes a first centering brace 25. The outer edge of the first centering support piece 25 is fixed in the sound generating device. The top end of the first voice coil 21 is connected to the inner edge of the first centering support piece 25, and the first diaphragm 22 is connected to the side of the first centering support piece 25 away from the first voice coil, further improving the first The anti-polarization performance of the voice coil 21 during vibration ensures its acoustic performance. The folding ring on the first diaphragm 22 protrudes upward along the vibration direction of the first voice coil 21, and the folding ring on the connecting piece 23 protrudes downward to avoid the first centering support piece 25, which is the first centering support The sheet 25 provides sufficient space for installation and vibration, prevents collisions during vibration, and ensures the stability of the acoustic performance of the present application.

In some embodiments, referring to FIGS. 1 to 5, the second vibration system 3 further includes a second diaphragm 32 and a second centering support piece 33. The end of the second voice coil 31 away from the magnetic circuit system 1 is connected to the second centering branch 33, and the second diaphragm 32 is connected to the second centering branch 33 away from the first One side of the two voice coil 31.

In some embodiments, referring to FIG. 5, the first vibration system 2 of the present application fixes the upper and lower surfaces of the first voice coil 21 through the first diaphragm 22 and the connecting piece 23, so that the vibration balance of the first vibration system 2 is better; The second vibration system 3 can be designed with a multi-leg structure of a complete and larger second centering support piece 33 bonded to the second diaphragm 22 to bring better balance, so that the two vibration systems of the present application can be used simultaneously The anti-sway polarization ability is better when working, and the best acoustic performance can be achieved when the product is applied.

In some embodiments, referring to FIGS. 1 to 5, the first magnetic gap 18 is far away from the central magnet 14, so that the first magnetic gap 18 and the second magnetic gap 19 are misaligned, which avoids the first voice coil 21 and The second voice coil 31 hinders each other in the process of simultaneous vibration. At the same time, due to the staggered arrangement, the vibration space of the first voice coil 21 and the second voice coil 31 can avoid each other. Under the premise of meeting the requirements of use, the thickness of the magnetic circuit system can be made as thin as possible to reduce the sound generating device. The size to meet the requirements of miniaturization.

In some embodiments, referring to FIGS. 1 to 8, the magnetic circuit system 1 further includes a magnetic yoke 11, a side magnet 15, a center washer 16 and a side washer 17. The magnetically permeable yoke 11 includes a central portion 12 at an intermediate position and a frame portion 13 surrounding the central portion 12. The frame portion 13 has a hollow area formed by enclosure. As shown in FIG. 6, the central portion 12 is opposite to the hollow area and is higher than the frame portion 13. Those skilled in the art can understand that higher than is a relative concept. It can also be said that, as shown in FIG. 7, the central portion 12 If it is lower than the frame portion 13, then the upper and lower positions defined in the higher direction in this application also undergo a relative change.

In the horizontal projection, the outline of the central portion 12 can match the outline of the hollow area of the frame portion 13, or it can be smaller than the outline of the hollow area of the frame portion 13 or larger than the outline of the hollow area of the frame portion 13. Not limited.

There is a gap between the center portion 12 and the frame portion 13. At least two opposite ends of the central portion 12 are fixedly connected to the frame portion 13 by connecting walls. At least two opposite ends of the central portion 12 are fixedly connected with the frame portion 13 to maintain the integrity of the magnetic yoke 11 and the stability of the structure. 6 and 7, both ends of the central portion 12 may be fixedly connected to the frame portion 13 through connecting walls. The magnetic yoke 11 can be processed and formed by an integral molding process, or the central portion 12 and the frame portion 13 can be fixedly connected by welding or riveting. This application is not limited to this, and can make the central portion 12 and the frame portion 13 are firmly connected.

4 and 8, the frame portion 13 of the magnetic yoke 11 is upwardly provided with side magnets 15 and side washers 17, and the side washers 17 and the central portion 12 of the magnetic yoke 11 form the first vibration system 2 The first magnetic gap 18 into which a voice coil 21 extends enables the magnetic circuit system 1 to drive the first voice coil 21 to vibrate to drive the first vibration system 2 to vibrate and produce sound when the first voice coil 21 is connected to an electrical signal.

4 and 8, the central part 12 of the magnetic yoke 11 is provided with a central magnet 14 and a central washer 16 in sequence downwards. The central washer 16 and the frame part 13 of the magnetic yoke 11 form the second vibration system 3 The second magnetic gap 19 into which the second voice coil 31 extends enables the magnetic circuit system 1 to drive the second voice coil 31 to vibrate to drive the second vibration system 3 to vibrate and produce sound when the second voice coil 31 is connected to an electrical signal.

The structural design of the magnetic yoke of the present application can greatly simplify the structure of the magnetic circuit system in the double-sided speaker. The magnetic yoke of the present application can not only function as a basin frame, but the center part and the frame body can also function as central magnets respectively. The functions of the center washer and side washer on both sides simplifies the magnetic structure of the magnetic circuit system in the double-sided speaker, making the structure of the double-sided speaker simpler and relatively smaller in size.

In some embodiments, referring to FIGS. 4 and 8, the first magnetic gap 18 and the second magnetic gap 19 are located between the center magnet 14 and the side magnets 15 to provide sufficient space for the vibration of the voice coil and avoid magnetic leakage.

In some embodiments, referring to FIGS. 4 and 8, the first magnetic gap 18 is far away from the central magnet 14 so that the central portion 12 of the magnetic yoke 11 matches the hollow area of the frame portion 13 as much as possible, reducing cutting. Reduce the waste of materials in the processing process such as integral molding. When the magnetic yoke 11 is processed by an integrated molding process, if the first magnetic gap 18 is far away from the center magnet 14, the size of the center portion 12 and the frame portion 13 will inevitably be reduced, and the size of the center washers 16 and side washers 17 will be increased , Resulting in increased material loss. Of course, in some other embodiments, the first magnetic gap 18 may also be close to the central magnet 14, which is not limited in the present application.

In some embodiments, referring to FIGS. 1 to 5, the magnetic circuit system 1 includes a plurality of side magnets 15, and the plurality of side magnets 15 are symmetrically arranged around the center magnet 14, so that the first voice coil 21 and the second voice coil 31 The force is uniform during vibration, providing better vibration performance. There are gaps between adjacent side magnets 15, and the connecting piece 23 can avoid the side magnets 15 and connect with the first voice coil 21 located outside by using these gaps.

In some embodiments, referring to FIGS. 1 to 5, the magnetic circuit system 1 is rectangular or round, and the central magnet 14 is correspondingly rectangular or round. The side magnet 15 is arranged on the side of the long axis of the magnetic circuit system 1, so that the magnetic gap is located on the side of the long axis, and the magnetic gap is set on the side of the long axis, relatively more magnetic gaps can be obtained to meet the requirements of magnetic performance . The long axis end of the central portion 12 can be flush with the inner side of the long axis end of the frame portion 13 up and down. When the first voice coil 21 and the second voice coil 31 are located in the magnetic circuit system 1, the long side magnetic gap of the voice coil can be smaller , The voice coil can obtain higher magnetic performance, making the product performance better.

In some embodiments, referring to FIGS. 1 to 5, the connecting piece 23 extends in the direction of the minor axis of the magnetic circuit system 1 to be connected to one end of the first voice coil 21, and lacks the obstruction of the side magnet. The connecting piece 23 can be connected to the bottom end of the first voice coil 21 to provide installation and movement space for the vibration of the connecting piece 23.

In some embodiments, referring to FIG. 3, the connecting wall is located on the short axis end of the magnetic circuit system 1, the connecting wall is connected to the inner edge of the frame portion 13, and the first voice coil 21 Located on the outer side of the connecting wall makes the internal structure of the present application more optimized and reduces the structure of the outer side of the first voice coil 21 to provide sufficient installation space for the connecting piece 23.

In some embodiments, referring to FIG. 5, the first vibration system 2 includes a plurality of connecting pieces 23, and the plurality of connecting pieces 23 are symmetrically connected with the first voice coil 21 to provide a balanced force of the first voice coil 21 , Ensure its acoustic performance.

In some embodiments, referring to FIGS. 1 to 8, it further includes a first housing assembly 4, the edge washer 17 and the first diaphragm 22 and the connecting piece 23 of the first vibration system 2 are held in the The first housing assembly 4 is used to support the first vibration assembly 2 and maintain a fixed connection with the magnetic circuit system 1.

Or/and, further includes a second housing assembly 5, the frame portion 13 of the magnetic yoke 11 and the second vibration system 3 are fixed to the second housing assembly 5 for supporting the second vibration assembly 3 and maintain a fixed connection with the magnetic circuit system 1.

In some embodiments, the fixed connection relationship with the first housing assembly 4 and the second housing assembly 5 may be achieved through injection molding and bonding processes. Those skilled in the art can make selections according to their needs. not limited.

In some embodiments, referring to FIGS. 1 to 5, the first housing assembly 4 and the second housing assembly 5 may be respectively arranged on both sides of the magnetic circuit system 1, and the magnetic circuit system 1 is fixed to form a whole. The side magnet 15 away from the center magnet 14 is exposed to reduce the volume of the housing of the sound generating device. The side of the side magnet 15 away from the center magnet 14 may be flush with the outer wall of the first housing assembly 4 or/and the second housing assembly 5 to reduce the overall size of the present application.

In some embodiments, when a circuit is provided on the connecting piece 23, the first voice coil 21 can also be electrically connected to the outside through the connecting piece 23 to transmit electrical signals. When a circuit is provided on the second centering branch 33, the second voice coil 31 can also be electrically connected to the outside through the second centering branch 33.

In some embodiments, the first vibration system 2 may further include a first reinforcement part 24 arranged in the middle of the first diaphragm 22 for improving the acoustic performance of the first vibration system 2. The second vibration system 3 also includes a second reinforcement part 34 arranged in the middle of the second diaphragm 32 to improve the acoustic performance of the second vibration system 3.

According to another aspect of the present application, the present application also provides an electronic device, which includes a housing and the above-mentioned sound emitting device provided in the housing.

In some embodiments, the electronic device may be an electronic device such as a laptop computer, a mobile phone, and a tablet computer.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A sound generating device, characterized by comprising a magnetic circuit system and a first vibration system and a second vibration system respectively located on two sides of the magnetic circuit system;

The magnetic circuit system includes a central magnet in the middle, one side of the magnetic circuit system forms a first magnetic gap into which the first voice coil of the first vibration system extends, and the other side of the magnetic circuit system forms a supply A second magnetic gap into which the second voice coil of the second vibration system extends, where the first magnetic gap and the second magnetic gap are located outside the central magnet;

At least the first vibration system further includes a first diaphragm and a connecting piece with a folded ring. The first diaphragm is located at an end of the first voice coil away from the magnetic circuit system, and the connecting piece is connected to the The bottom end of the first voice coil facing the magnetic circuit system restricts the first voice coil from vibrating vertically in a direction perpendicular to the first magnetic gap.
The sounding device according to claim 1, wherein the convex direction of the folding ring on the connecting piece and the folding ring on the first diaphragm are the same or opposite.
The sounding device according to claim 2, wherein the folding ring on the connecting piece protrudes upward or downward along the vibration direction of the first voice coil.
The sounding device according to claim 2, wherein the position of the folding ring on the connecting piece is opposite to the position of the folding ring on the diaphragm.
The sounding device according to claim 1, wherein the first vibration system further comprises a first centering support piece, the top end of the first voice coil is connected to the first centering support piece, and the The first diaphragm is connected to the side of the first centering branch away from the first voice coil.
The sound generating device according to claim 1, wherein the first magnetic gap and the second magnetic gap are alternately arranged, and the first magnetic gap is away from the central magnet.
The sounding device according to claim 1, wherein the second vibration system further comprises a second diaphragm and a second centering support piece, and an end of the second voice coil away from the magnetic circuit system is connected to the The second centering branch is connected, and the second diaphragm is connected to a side of the second centering branch away from the second voice coil.
The sounding device according to claim 1, wherein the magnetic circuit system further comprises a magnetic yoke, a side magnet, a center washer, and a side washer, and the magnetic yoke includes a frame with a hollow area and Opposite to the hollow area and higher than the middle part of the frame body part, there is a gap between the central part and the frame body part, and at least two opposite ends of the central part are fixedly connected to each other by connecting walls. On the frame body;

The frame portion of the magnetic yoke is sequentially provided with side magnets and side washers, and the side washers and the central portion of the magnetic yoke have a first magnetic gap; the central portion of the magnetic yoke is arranged downwards in sequence A center magnet and a center washer, the center washer and the frame of the magnetic yoke form a second magnetic gap into which the second voice coil of the second vibration system extends, and the first magnetic gap and The second magnetic gap is located between the center magnet and the side magnets.
The sounding device according to claim 8, wherein the magnetic circuit system comprises a plurality of side magnets, the plurality of side magnets are symmetrically arranged on the outer side of the center magnet, and the connecting piece avoids the side magnet and the center magnet. The first voice coil connection.
The sounding device according to claim 9, wherein the magnetic circuit system is rectangular or round, the central magnet is a corresponding rectangle or round, and the connecting wall is located on the magnetic circuit system. On the short axis end, the connecting wall is connected to the inner edge of the frame portion, the first voice coil is located outside the connecting wall, and the side magnet is arranged on the long axis side of the magnetic circuit system The connecting piece extends in the direction of the minor axis of the magnetic circuit system and is connected to one end of the first voice coil.
The sound generating device according to claim 9, wherein the first vibration system comprises a plurality of connecting pieces, and the plurality of connecting pieces are symmetrically connected with the first voice coil.
The sound emitting device according to claim 9, further comprising a first housing assembly and a second housing assembly, the first housing assembly and the second housing assembly are respectively arranged on the magnetic circuit system On both sides, the edge washer and the first diaphragm and connecting piece of the first vibration system are held in the first housing assembly; the frame portion of the magnetic yoke and the second vibration system are held in In the second housing assembly, a side of the side magnet away from the center magnet is exposed.
An electronic device, characterized by comprising the sounding device according to any one of claims 1-12 in which a casing is arranged in the casing.