CN222814595U

CN222814595U - Sound generating devices and electronic equipment

Info

Publication number: CN222814595U
Application number: CN202421778808.8U
Authority: CN
Inventors: 郭翔; 于龙欣; 朱本超
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2024-07-25
Filing date: 2024-07-25
Publication date: 2025-04-29
Anticipated expiration: 2034-07-25

Abstract

The utility model discloses a sound-generating device and an electronic device, and relates to the technical field of electroacoustic transducer. The sound-generating device comprises a vibration system and a magnetic circuit system, wherein the vibration system comprises a diaphragm and a voice coil, and the magnetic circuit system comprises a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, wherein the side magnetic part is located outside the central magnetic part and is spaced from the central magnetic part to form a magnetic gap, and the voice coil is arranged correspondingly to the magnetic gap, and the central magnetic part comprises an intermediate magnetic component and a Halbach magnetic circuit, wherein the Halbach magnetic circuit is arranged on at least one side of the intermediate magnetic component along a vibration direction perpendicular to the vibration system, and the intermediate magnetic component comprises a first central magnet and a central magnetic plate arranged in a stacked manner, and the first central magnet is connected to the magnetic yoke. The sound-generating device of the utility model increases the BL value by optimizing the central magnetic part of the magnetic circuit system, effectively improves the flatness of the BL curve, significantly improves the FR frequency response curve, and effectively reduces the harmonic distortion THD, so that the sound quality and performance of the whole machine are better improved.

Description

Sound producing device and electronic equipment

Technical Field

The present utility model relates to electroacoustic transduction, and more particularly, to a sound generating device and an electronic device using the sound generating device.

Background

In recent years, portable electronic devices (e.g., mobile phones, headphones, computers) have been put into daily life. Along with the rapid development of technology, the sound quality requirements of people on electronic equipment are also higher, and the full-frequency and miniature speaker becomes the mainstream requirements.

At present, box space in electronic equipment is smaller and smaller, and BL value of sound generating mechanism is limited by space size, so that the quantity of magnetic lines of force passing through the voice coil is small, and the magnetic field force received by the voice coil is small, so that the sensitivity of the sound generating mechanism is low, and the overall acoustic performance and sound effect are poor.

Disclosure of utility model

The main purpose of the utility model is to provide a sound generating device and electronic equipment, aiming at providing a sound generating device for effectively improving BL value, the sound generating device is characterized in that by optimizing the central magnetic part of a magnetic circuit system, therefore, the BL value is increased, the flatness of the BL curve is effectively improved, the FR frequency response curve is obviously improved, the harmonic distortion THD is effectively reduced, and the tone quality and performance of the whole machine are better improved.

To achieve the above object, the present utility model provides a sound emitting device including:

A vibration system including a diaphragm and a voice coil connected to the diaphragm;

The magnetic circuit system comprises a magnetic yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the magnetic yoke, the side magnetic part is arranged on the outer side of the central magnetic part and is spaced with the central magnetic part to form a magnetic gap, the voice coil is arranged corresponding to the magnetic gap, the central magnetic part comprises a middle magnetic component and a halbach magnetic circuit, the halbach magnetic circuit is arranged on at least one side of the middle magnetic component along the vibration direction perpendicular to the vibration system, the middle magnetic component comprises a first central magnet and a central magnetic guide plate, and the first central magnet is connected with the magnetic yoke.

In an embodiment, the middle magnetic assembly further comprises a second center magnet, the second center magnet is arranged on one side, opposite to the first center magnet, of the center magnetic conductive plate, the first center magnet and the second center magnet magnetize along the vibration direction of the vibration system, and the magnetization direction of the first center magnet is opposite to the magnetization direction of the second center magnet.

In one embodiment, the middle magnetic assembly further comprises a third center magnet, wherein the third center magnet is arranged between the first center magnet and the center magnetic conduction plate, and/or the third center magnet is arranged between the second center magnet and the center magnetic conduction plate, and the magnetizing direction of the third center magnet is perpendicular to the magnetizing directions of the first center magnet and the second center magnet;

And/or the central magnetic conduction plates comprise a plurality of adjacent and side-by-side central magnetic conduction plates, and are positioned between the first central magnet and the second central magnet.

In one embodiment, the side magnetic part comprises a side magnet and a side magnetic conduction plate which are arranged in a stacked manner, and the side magnet is connected with the magnetic conduction yoke;

The first center magnet, the second center magnet and the side magnets are magnetized along the vibration direction of the vibration system, the magnetization direction of the first center magnet is opposite to that of the side magnets of the side magnetic part, and the magnetization direction of the second center magnet is identical to that of the side magnets of the side magnetic part.

In one embodiment, the halbach magnetic circuit includes a first magnet, a second magnet, and a third magnet that are stacked, the first magnet being connected to the magnetic yoke;

The first magnet and the third magnet magnetize along the vibration direction of the vibration system, and the magnetizing direction of the second magnet is perpendicular to the magnetizing direction of the first magnet and the magnetizing direction of the third magnet.

In one embodiment, the magnetizing direction of the first magnet is opposite to the magnetizing direction of the third magnet;

And/or the magnetizing direction of the first magnet is the same as the magnetizing direction of the first center magnet, and the magnetizing direction of the third magnet is the same as the magnetizing direction of the second center magnet;

and/or the polarity of one end of the second magnet far away from the middle magnetic assembly is the same as the polarity of one end of the first magnet and one end of the third magnet close to the second magnet;

and/or the second magnets comprise a plurality of second magnets which are adjacent and arranged side by side and are positioned between the first magnets and the third magnets.

In one embodiment, the first magnet and the first center magnet are integrally formed;

And/or the thickness of the first magnet along the vertical direction is equivalent to the thickness of the first center magnet along the vertical direction;

And/or, the third magnet and the second center magnet are of an integrated structure;

And/or the thickness of the third magnet along the vertical direction is smaller than or equal to the thickness of the second center magnet along the vertical direction;

And/or the thickness of the second magnet along the vertical direction is greater than or equal to the thickness of the central magnetic conduction plate along the vertical direction.

In an embodiment, a projection of at least part of the second magnet in a direction perpendicular to a vibration direction of the vibration system coincides with a projection of the voice coil in a direction perpendicular to a vibration direction of the vibration system;

And/or, at least part of the projection of the central magnetic conduction plate along the vibration direction perpendicular to the vibration system coincides with the projection of the second magnet along the vibration direction perpendicular to the vibration system.

In one embodiment, the halbach magnetic circuit is circumferentially disposed about the periphery of the intermediate magnetic assembly;

The second magnets form a closed integral annular structure, or the second magnets comprise a plurality of adjacent second magnets which are connected end to form a closed annular structure, or the second magnets comprise a plurality of second magnets which are circumferentially arranged on the periphery of the middle magnetic assembly, and gaps are reserved between the adjacent second magnets.

In an embodiment, the halbach magnetic circuit further includes a first magnetically permeable plate;

the first magnetic conduction plate is arranged between the first magnet and the second magnet, and/or the first magnetic conduction plate is arranged between the third magnet and the second magnet, and/or the first magnetic conduction plate is adjacent to the second magnet and arranged side by side and is positioned between the first magnet and the third magnet.

In one embodiment, the first magnetic conductive plates and the second magnets are adjacently arranged side by side and alternately, and are positioned between the first magnets and the third magnets;

and/or, the first magnetic conduction plate and the central magnetic conduction plate are of an integrated structure;

And/or the middle magnetic assembly further comprises a third center magnet, wherein the third center magnet is arranged between the center magnetic conduction plate and the first center magnet and/or the second center magnet, the magnetizing direction of the third center magnet is perpendicular to the magnetizing directions of the first center magnet and the second center magnet, and the third center magnet and the second magnet are of an integrated structure.

In one embodiment, the middle magnetic assembly is square, and has a short axis side and a long axis side which are connected end to end;

The two short axis sides of the middle magnetic component are respectively provided with the halbach magnetic circuits, and/or the two long axis sides of the middle magnetic component are respectively provided with the halbach magnetic circuits.

In an embodiment, the sound generating device further comprises a housing, the side magnetic part comprises a side magnet and a side magnetic conduction plate which are stacked, the side magnet is connected with the magnetic conduction yoke, one end of the housing is connected with the side magnetic conduction plate, and the other end of the housing is connected with the periphery of the vibrating diaphragm.

In one embodiment, the side magnetic conduction plate and the shell are of an integrated structure;

And/or the vibrating diaphragm is annular, the inner periphery of the vibrating diaphragm is fixed on the magnetic circuit system, one end of the voice coil is connected with the vibrating diaphragm, and the other end of the voice coil is suspended in the magnetic gap.

In one embodiment, the vibration system further comprises a frame, and the voice coil is connected with the vibrating diaphragm through the frame.

In one embodiment, the skeleton comprises a main body part and a connecting part connected to the periphery of the main body part, and the main body part is arranged between the vibrating diaphragm and the voice coil;

The vibration system further comprises a centering support piece, wherein the centering support piece comprises an outer fixing portion, an inner fixing portion and an elastic wall portion, the elastic wall portion is connected with the outer fixing portion and the inner fixing portion, the outer fixing portion is connected with the shell and/or the side magnetic portion, and the inner fixing portion is connected with the connecting portion.

In an embodiment, the vibrating diaphragm includes inner ring portion, encircle the first ring that inner ring portion set up, encircle the straight portion that first ring set up, encircle the second ring that straight portion set up and connect in the fixed part in the second ring outside, fixed part connect in the shell, straight portion with the skeleton is connected, inner ring portion is formed with the inner ring hole, inner ring portion connect in the central magnetic part, at least part the middle magnetic component is protruding to be located the inner ring hole.

In an embodiment, the inner ring portion, the first folding ring, the straight portion, the second folding ring and the fixing portion are integrally formed;

And/or the first folding ring is raised towards the direction away from the magnetic conducting yoke, and the second folding ring is raised towards the direction close to the magnetic conducting yoke;

And/or the vibrating diaphragm further comprises a reinforcing part, wherein the reinforcing part is arranged between the straight part and the framework;

And/or, the fixing part is far away from one end of the second folding ring and is bent towards the shell to form a bending part, and the bending part is connected to the outer wall of the shell.

The utility model also proposes an electronic device, the electronic equipment comprises the sounding device.

According to the sound production device, the magnetic circuit system is arranged to be the magnetic guide yoke, the central magnetic part and the side magnetic part are arranged on the magnetic guide yoke, the side magnetic part is arranged on the outer side of the central magnetic part and is separated from the central magnetic part to form a magnetic gap, the voice coil of the vibration system is correspondingly arranged with the magnetic gap, so that current is introduced into the voice coil, the voice coil vibrates in a magnetic field formed by the magnetic circuit system and drives the vibrating diaphragm to vibrate and produce sound, meanwhile, the middle magnetic component of the central magnetic part is arranged to be the first central magnet and the central magnetic guide plate which are arranged on the magnetic guide yoke in a laminated mode, and the halbach magnetic circuit is arranged on at least one side of the middle magnetic component along the vibration direction perpendicular to the vibration system, so that the halbach magnetic circuit and the middle magnetic component are matched with each other, and the magnetic field passes through the magnetic gap after being overlapped, the magnetic flux density of the magnetic gap is increased, the number of magnetic lines of force passing through the voice coil is increased, the BL value is increased, the sensitivity of the sound production device is improved, the flatness of a BL curve is effectively improved, the FR curve is obviously improved, the THD is effectively improved, and the sound response performance is effectively reduced, and the sound production performance is better.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a sound generating apparatus according to the present utility model;

FIG. 2 is a schematic diagram illustrating a structure of a sound generating apparatus according to another embodiment of the present utility model;

FIG. 3 is an exploded view of an embodiment of a sound emitting device according to the present utility model;

FIG. 4 is a schematic cross-sectional view of an embodiment of a sound generating apparatus according to the present utility model;

FIG. 5 is a schematic view of a portion of an embodiment of a sound generating apparatus according to the present utility model;

FIG. 6 is an exploded view of one embodiment of a central magnetic portion provided by the present utility model;

FIG. 7 is a schematic cross-sectional view of an embodiment of a central magnetic portion provided by the present utility model;

FIG. 8 is a schematic cross-sectional view of another embodiment of a central magnetic portion provided by the present utility model;

FIG. 9 is a schematic cross-sectional view of yet another embodiment of a central magnetic portion provided by the present utility model;

Fig. 10 is a schematic structural diagram of an arrangement of a central magnetic conductive plate and a second magnet according to an embodiment of the present utility model;

FIG. 11 is a schematic diagram of an arrangement of a central magnetically permeable plate and a second magnet according to another embodiment of the present utility model;

Fig. 12 is a schematic structural diagram of an arrangement of a central magnetic conductive plate and a second magnet according to another embodiment of the present utility model;

fig. 13 is a schematic structural diagram of an arrangement of a central magnetic conductive plate and a second magnet according to another embodiment of the present utility model;

FIG. 14 is a graph comparing BL curves of a sound generating device provided by the present utility model and the prior art;

fig. 15 is a graph comparing FR curves of the sound generating apparatus provided by the present utility model with those of the prior art.

Reference numerals illustrate:

100. The sound generating device comprises a sound generating device body, a shell body, 2, a magnetic circuit system, 21, a magnetic conducting yoke, 22, a central magnetic part, 221, an intermediate magnetic component, 2211, a first central magnet, 2212, a central magnetic conducting plate, 2213, a second central magnet, 2214, a third central magnet, 222, a halbach magnetic circuit, 2221, a first magnet, 2222, a second magnet, 2223, a third magnet, 2224, a first magnetic conducting plate, 23, a side magnetic part, 231, a side magnet, 232, a side magnetic conducting plate, 24, a magnetic gap, 3, a vibration system, 31, a vibrating diaphragm, 311, an inner ring part, 312, an inner ring hole, 313, a first folding ring, 314, a straight part, 315, a second folding ring, 316, a fixing part, 317, a bending part, 318, a reinforcing part, 32, a voice coil, 33, a framework, 331, a main body part, 332, a connecting part, 34, a centering support piece, 341, an outer fixing part, 342, an inner fixing part, 343 and a spring wall part.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Based on the above concepts and problems, the present utility model proposes a sound generating apparatus 100. It is understood that the sound generating apparatus 100 may be applied to an electronic device, and the electronic device may be a smart watch, a mobile phone, a sound device, a computer, an earphone, a television, or the like, which is not limited herein.

Referring to fig. 1 to 13 in combination, in an embodiment of the present utility model, the sound generating apparatus 100 includes a vibration system 3 and a magnetic circuit 2, wherein the vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31, the magnetic circuit 2 includes a magnetic yoke 21, a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21, the side magnetic portion 23 is disposed on the outer side of the central magnetic portion 22 and spaced apart from the central magnetic portion 22 to form a magnetic gap 24, the voice coil 32 is disposed corresponding to the magnetic gap 24, the central magnetic portion 22 includes an intermediate magnetic assembly 221 and a halbach magnetic circuit 222, the halbach magnetic circuit 222 is disposed on at least one side of the intermediate magnetic assembly 221 along a direction perpendicular to a vibration direction of the vibration system 3, the intermediate magnetic assembly 221 includes a first central magnet 2211 and a central magnetic plate 2212 which are stacked, and the first central magnet 2211 is connected to the magnetic yoke 21.

In this embodiment, the sound generating device 100 may be a sound generating unit of a speaker, and the speaker may be a micro speaker. Of course, the sound generating device 100 may also be a speaker module, i.e. a sound generating module structure, which is not limited herein.

The magnetic circuit 2 and the vibration system 3 of the sound generating device 100 are disposed opposite to each other. Of course, in other embodiments, in order to further reduce the Z-dimension of the electronic device, the Z-height of the sound generating device 100 is utilized to increase the Z-height of the magnetic circuit 2 of the sound generating device 100, that is, the center of the vibration system 3 is provided with a through structure for the magnetic circuit 2 to protrude, at this moment, at least part of the magnetic circuit 2 protrudes from the through structure in the center of the vibration system 3, and the center of the vibration system 3 is fixedly connected with the magnetic circuit 2, which is not limited herein.

Alternatively, the magnetic circuit 2 may be provided in a square shape. For example, the magnetic circuit system 2 may include a center magnetic portion 22 and side magnetic portions 23 each having a square structure. The vibration system 3 is optionally arranged in a square. It should be understood that the periphery of the diaphragm 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be assembled on a housing or a module housing, which is not limited herein.

In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In an embodiment, as shown in fig. 1 to 5, the sound generating device 100 further includes a housing 1, the magnetic circuit system 2 is connected to one end of the housing 1, and the vibration system 3 is connected to the other end of the housing 1, that is, the periphery of the diaphragm 31 of the vibration system 3 is connected to the other end of the housing 1.

In the present embodiment, the housing 1 is used for mounting, fixing and supporting the components of the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides a mounting base for the components of the magnetic circuit system 2 and the vibration system 3. It will be appreciated that the housing 1 may be a unitary structure or may be formed by a plurality of separate structures, which are not limited herein. The housing 1 in this embodiment may be a square frame or a frame structure, that is, the housing 1 has a cavity with two open ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to two sides of the housing 1, so that the vibration cavities are formed by enclosing the magnetic circuit system 2, the housing 1 and the vibration film 31 of the vibration system 3.

It is understood that the sound generating apparatus 100 is applied to an electronic device, that is, the sound generating apparatus 100 may be mounted to the electronic device through the housing 1. It should be noted that, the housing 1 of the sound generating apparatus 100 may be a housing or a box structure independent of the electronic device, and at this time, the magnetic circuit system 2, the vibration system 3, and other components of the sound generating apparatus 100 are integrated into a whole structure by using the housing 1, so as to facilitate disassembly and assembly. Of course, the housing 1 of the sound generating apparatus 100 may be integrally formed with the housing or the case of the electronic device, so as to effectively improve the structural strength and sealing performance.

In the present embodiment, the housing 1 is used to house and fix the structures such as the vibration system 3 and the magnetic circuit system 2, so that the sound generating apparatus 100 can be applied as a separate component to an electronic device or a sound generating module, which is not limited herein. Of course, in other embodiments, the sound generating device 100 may be a module structure, and in this case, the structures such as the vibration system 3 and the magnetic circuit system 2 of the sound generating unit are respectively mounted as a plurality of independent components on the housing 1 of the module structure, which is not limited herein.

It is understood that by providing the magnetic circuit 2 as the magnetic yoke 21 and the center magnetic portion 22 and the side magnetic portion 23 provided to the magnetic yoke 21, the magnetic circuit 2 may be connected to the housing 1 through the periphery of the magnetic yoke 21, or the magnetic circuit 2 may be connected to the housing 1 through the side magnetic portion 23, which is not limited herein. In this embodiment, the side magnetic portion 23 is located outside the central magnetic portion 22 and surrounds the central magnetic portion 22 to form the magnetic gap 24, so that the diaphragm 31 of the vibration system 3 is connected to the end of the housing 1 away from the magnetic yoke 21 and opposite to and spaced from the magnetic circuit 2, so that one end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is disposed corresponding to the magnetic gap 24.

The voice coil 32 may be a flat voice coil, which is fixed to the side of the diaphragm 31 facing the magnetic circuit 2 and is disposed opposite to and spaced apart from the magnetic gap 24 of the magnetic circuit 2, that is, the other end of the voice coil 32 is located outside the magnetic gap 24 and is disposed opposite to the magnetic gap 24 along the vibration direction of the vibration system 3, or the voice coil 32 may be a circular tube, which has one end connected to the diaphragm 31 and the other end of the voice coil 32 suspended in the magnetic gap 24, and is not limited herein.

To make electrical connection of the voice coil 32 to an external circuit. In an embodiment, as shown in fig. 2 to 5, the vibration system 3 further includes a centering support piece 34, one end of the centering support piece 34 is connected to the voice coil 32 and is connected to and conducted with a lead wire of the voice coil 32, and the other end of the centering support piece 34 is connected to the housing 1 and/or the side magnetic portion 23.

It will be appreciated that the two ends of the centering tabs 34 are electrically connected to the leads of the voice coil 32 and the external circuit, respectively. In this embodiment, the centering pads 34 may be disposed at the bottom of the voice coil 32, and the centering pads 34 are located at four corners of the sound emitting device 100 or in the short or long axis direction of the sound emitting device 100. Of course, the centering support 34 may also be disposed on top of the voice coil 32, and the centering support 34 is located between the voice coil 32 and the diaphragm 31, which is not limited herein.

In this embodiment, the central magnetic portion 22 is configured as the middle magnetic assembly 221 and the halbach magnetic circuit 222, that is, the halbach magnetic circuit 222 is disposed on at least one side of the middle magnetic assembly 221 along the direction perpendicular to the vibration direction of the vibration system 3, and the middle magnetic assembly 221 is configured as the first central magnet 2211 and the central magnetic conductive plate 2212 which are stacked and disposed on the magnetic yoke 21, so that the magnetic field formed by the halbach magnetic circuit 222 and the magnetic field formed by the middle magnetic assembly 221 are overlapped and then pass through the magnetic gap 24, so as to form a magnetic field with higher magnetic field strength, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines passing through the voice coil 32, increasing the magnetic field force received by the voice coil 32, effectively improving the BL value, improving the sensitivity of the sounding device 100, effectively improving the flatness of the BL curve (as shown in fig. 14), obviously improving the FR frequency response curve (as shown in fig. 15), effectively reducing the harmonic distortion THD, and better improving the sound effect and performance of the whole machine.

Fig. 14 is a graph showing a BL curve of the sound generating apparatus 100 according to the present application compared with a BL curve of a conventional speaker, wherein the BL curve has an abscissa of an amplitude mm and an ordinate of a BL value t.m. It can be seen that the BL curve of the inventive sound emitting device 100 is more symmetrical than that of the conventional speaker, and the BL value of the inventive sound emitting device 100 is higher than that of the conventional speaker. Fig. 15 is a graph comparing FR curves of the sound emitting device 100 of the present application with FR curves of conventional speakers, the FR curves having an abscissa of Hz and an ordinate of db. Therefore, the FR curve of the sound generating device 100 is obviously higher than that of the conventional loudspeaker when the frequency is smaller than 1000Hz, and the FR curve of the sound generating device 100 is obviously higher than that of the conventional loudspeaker when the frequency is larger than 1000 Hz-10000 Hz.

Alternatively, the vibration system 3 in the present embodiment vibrates in the vertical direction, that is, the halbach magnetic circuit 222 is provided at least one side of the intermediate magnetic assembly 221 in the horizontal direction. Of course, halbach magnetic circuit 222 is provided on a plurality of sides of intermediate magnetic assembly 221 in the horizontal direction or around a periphery of intermediate magnetic assembly 221 in the horizontal direction.

It should be noted that, in fig. 4 and fig. 5, the arrow direction in the magnetic circuit system 2 is the direction from the S pole to the N pole, that is, the magnetizing direction.

It can be understood that the halbach magnetic circuit 222 can form a halbach magnetic array, which can generate a stronger magnetic field, and the voice coil 32 is driven by the magnetic field generated by the halbach magnetic array to drive the diaphragm 31 to vibrate and sound, so that the voice coil 32 has a stronger magnetic field, which is beneficial to improving the sensitivity of controlling the vibration of the diaphragm 31, and the halbach magnetic array allows the magnetic induction lines at the voice coil 32 to be uniformly distributed and the magnetic field variation in the vibration direction of the diaphragm 31 to have good linearity, so that the tone quality of the audio output by the sound generating device 100 can be effectively improved, the sound raising effect can be improved, and the distortion condition of the audio output by the sound generating device 100 can be relieved to a certain extent. The vibration of the diaphragm 31 is specifically that the edge of the diaphragm 31 is fixed, and the surface of the diaphragm 31 vibrates reciprocally in a direction perpendicular to the surface of the diaphragm 31.

It can be appreciated that the first central magnet 2211 and the central magnetic conductive plate 2212 of the intermediate magnetic assembly 221 are stacked along the moving direction of the voice coil 32, that is, the first central magnet 2211 is connected to the magnetic conductive yoke 21, and the central magnetic conductive plate 2212 is stacked on the side of the first central magnet 2211 opposite to the magnetic conductive yoke 21. In the present embodiment, the first central magnet 2211 and the central magnetic conductive plate 2212 of the intermediate magnetic assembly 221 may alternatively have a square plate-like structure, which is not limited herein. Alternatively, the first center magnet 2211 and the center magnetically permeable plate 2212 of the intermediate magnetic assembly 221 are stacked in a vertical direction.

In one embodiment, the intermediate magnetic assembly 221 further includes a second center magnet 2213, where the second center magnet 2213 is disposed on a side of the center magnetic conductive plate 2212 facing away from the first center magnet 2211.

In the present embodiment, the first center magnet 2211, the center magnetic conductive plate 2212 and the second center magnet 2213 of the middle magnetic assembly 221 are stacked along the moving direction of the voice coil 32, that is, the first center magnet 2211, the center magnetic conductive plate 2212 and the second center magnet 2213 of the middle magnetic assembly 221 are stacked along the vertical direction.

It can be appreciated that the first central magnet 2211 is connected to the magnetic yoke 21, the central magnetic conductive plate 2212 is laminated on a side of the first central magnet 2211 facing away from the magnetic yoke 21, and the second central magnet 2213 is laminated on a side of the central magnetic conductive plate 2212 facing away from the first central magnet 2211. In the present embodiment, the first central magnet 2211, the central magnetic conductive plate 2212 and the second central magnet 2213 of the intermediate magnetic assembly 221 are optionally in a square plate structure, which is not limited herein.

In one embodiment, as shown in fig. 10, 12 and 13, the central magnetic conductive plate 2212 includes a plurality of central magnetic conductive plates 2212 disposed adjacent and side by side, and located on a side of the first central magnet 2211 facing away from the magnetic yoke 21.

Optionally, the central magnetic conductive plate 2212 includes a plurality of central magnetic conductive plates 2212 disposed adjacent and side by side and between the first central magnet 2211 and the second central magnet 2213.

It is understood that the central magnetic plate 2212 of the middle magnetic assembly 221 may be an integral square plate structure and located between the first central magnet 2211 and the second central magnet 2213, or the central magnetic plate 2212 includes a plurality of central magnetic plates 2212 arranged between the first central magnet 2211 and the second central magnet 2213 adjacently and in parallel, so that the plurality of central magnetic plates 2212 cooperate to form a square plate structure, which is not limited herein.

It should be noted that the first center magnet 2211 of the intermediate magnetic assembly 221 may be an integral square plate structure, or the first center magnet 2211 includes a plurality of first center magnets 2211 arranged between the magnetic yoke 21 and the central magnetic plate 2212 adjacently and in parallel, so that the plurality of first center magnets 2211 cooperate to form a square plate structure, which is not limited herein. The second center magnet 2213 of the intermediate magnetic assembly 221 may be an integral square plate structure, or the second center magnet 2213 includes a plurality of second center magnets 2213, which are adjacent and arranged in parallel on a side of the central magnetic conductive plate 2212 facing away from the first center magnet 2211, so that the plurality of second center magnets 2213 cooperate to form a square plate structure, which is not limited herein.

According to the sound production device 100, the magnetic circuit system 2 is arranged to be the magnetic guide yoke 21, the central magnetic part 22 and the side magnetic part 23 which are arranged on the magnetic guide yoke, the side magnetic part 23 is arranged on the outer side of the central magnetic part 22 and is spaced from the central magnetic part 22 to form the magnetic gap 24, the voice coil 32 of the vibration system 3 is arranged corresponding to the magnetic gap 24, and current is introduced into the voice coil 32, so that the voice coil 32 vibrates in a magnetic field formed by the magnetic circuit system 2 and drives the vibrating diaphragm 31 to vibrate and produce sound, meanwhile, the middle magnetic component 221 of the central magnetic part 22 is arranged to be the first central magnet 2211, the central magnetic guide plate 2212 and the second central magnet 2213 which are arranged in a lamination mode, and the halbach magnetic circuit 222 is arranged on at least one side of the middle magnetic component 221 along the vibration direction perpendicular to the vibration system 3, so that the halbach magnetic circuit 222 and the middle magnetic component 221 are matched with each other, and the magnetic field is enabled to pass through the magnetic gap 24 after being overlapped, the density of the magnetic field is increased, the quantity of magnetic force lines passing through the magnetic gap 24 is increased, the magnetic field lines of the voice coil 32 are increased, the BL force is stressed, the BL value is effectively improved, the sound production device is effectively improved, the sensitivity of the sound production device is improved, the sound production device is remarkably improved, the sound production efficiency is improved, and the sound production efficiency is remarkably has a sound production curve is improved, and the sound production effect is improved, and the harmonic is improved.

In an embodiment, the first central magnet 2211 and the second central magnet 2213 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the first central magnet 2211 is opposite to the magnetization direction of the second central magnet 2213.

Alternatively, the magnetic pole of the first central magnet 2211 on the side close to the central magnetic conduction plate 2212 is the same as the magnetic pole of the second central magnet 2213 on the side close to the central magnetic conduction plate 2212.

In the present embodiment, as shown in fig. 4, by magnetizing the first and second center magnets 2211 and 2213 of the intermediate magnetic assembly 221 located at both sides of the center magnetic conductive plate 2212 in the direction in which the voice coil 32 moves, the magnetizing direction of the first center magnet 2211 is opposite to the magnetizing direction of the second center magnet 2213, so that the magnetic induction lines of the first and second center magnets 2211 and 2213 are concentrated at the center magnetic conductive plate 2212, thereby passing through the magnetic gap 24 to generate a magnetic field having a strong magnetic field strength.

The vibration system 3 vibrates in the vertical direction in this embodiment, that is, the voice coil 32 moves in the vertical direction. Alternatively, the first central magnet 2211 and the second central magnet 2213 are magnetized in the vertical direction, and the magnetizing direction of the first central magnet 2211 is opposite to the magnetizing direction of the second central magnet 2213.

It is understood that the magnetizing direction of the first central magnet 2211 is opposite to the magnetizing direction of the second central magnet 2213, the N pole of the first central magnet 2211 is under the S pole, the N pole of the second central magnet 2213 is under the S pole, and vice versa.

In the present embodiment, the second center magnet 2213 is magnetized from top to bottom when the first center magnet 2211 is magnetized from bottom to top, or the second center magnet 2213 is magnetized from bottom to top when the first center magnet 2211 is magnetized from top to bottom, which is not limited herein.

In one embodiment, the side magnet 23 includes a side magnet 231 and a side magnetic plate 232 stacked together, the side magnet 231 is connected to the magnetic yoke 21, the first center magnet 2211, the second center magnet 2213, and the side magnet 231 are magnetized along the vibration direction of the vibration system 3, the magnetization direction of the first center magnet 2211 is opposite to the magnetization direction of the side magnet 231 of the side magnet 23, and the magnetization direction of the second center magnet 2213 is the same as the magnetization direction of the side magnet 231 of the side magnet 23.

Alternatively, the magnetic pole of the side magnet 231 near the side magnetic plate 232 is opposite to the magnetic pole of the first center magnet 2211 near the center magnetic plate 2212, and the magnetic pole of the side magnet 231 near the side magnetic plate 232 is opposite to the magnetic pole of the second center magnet 2213 near the center magnetic plate 2212.

In the present embodiment, as shown in fig. 2 to 5, the side magnet 231 and the side magnetic conductive plate 232 of the side magnetic portion 23 are stacked on the magnetic conductive yoke 21, and the side magnet 231 is connected to the magnetic conductive yoke 21. The side magnet 231 and the side magnetic conductive plate 232 of the side magnetic portion 23 are located outside the center magnetic portion 22 and are spaced apart to form the magnetic gap 24.

In one embodiment, the side magnetic portion 23 is optionally disposed in a ring shape, where the ring-shaped side magnetic portion 23 is located outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22 by being spaced apart. Optionally, the side magnets 231 and/or the side magnetically permeable plates 232 form a closed integral ring structure.

Of course, in other embodiments, the side magnetic portion 23 includes a plurality of side magnetic portions 23, and the plurality of side magnetic portions 23 are disposed around the outside of the central magnetic portion 22 and are surrounded by the central magnetic portion 22 to form the magnetic gap 24. Optionally, the side magnets 231 and the side magnetic plates 232 are plural and are disposed in one-to-one correspondence, and the adjacent side magnets 231 are connected end to form a closed ring structure. The side magnets 231 may be formed into a closed integral ring structure, the side magnetic plates 232 may be formed into a plurality of closed ring structures, and the adjacent side magnetic plates 232 may be connected end to end and disposed in correspondence with the ring-shaped side magnets 231, or the side magnetic plates 232 may be formed into a closed integral ring structure, the side magnets 231 may be formed into a plurality of closed ring structures, and the adjacent side magnets 231 may be connected end to end and disposed in correspondence with the ring-shaped side magnetic plates 232, or the plurality of side magnetic portions 23 may be disposed around the outer side of the central magnetic portion 22 at intervals, and the plurality of side magnetic portions 23 may be disposed without limitation.

In order to facilitate the installation of the centering support piece 34, the plurality of side magnetic portions 23 are disposed around the outer side of the center magnetic portion 22, and a notch for avoiding the centering support piece 34 is provided between two adjacent side magnetic portions 23, which is not limited herein.

In the present embodiment, the side magnet 231 of the side magnet portion 23 and the first and second center magnets 2211 and 2213 of the intermediate magnet assembly 221 are magnetized in the vertical direction, that is, in the moving direction of the voice coil 32. Alternatively, the magnetizing direction of the first center magnet 2211 is opposite to the magnetizing direction of the side magnet 231 of the side magnet portion 23, and the magnetizing direction of the second center magnet 2213 is the same as the magnetizing direction of the side magnet 231 of the side magnet portion 23.

It will be appreciated that the second center magnet 2213 and the side magnet 231 are magnetized from top to bottom when the first center magnet 2211 is magnetized from bottom to top, or the second center magnet 2213 and the side magnet 231 are magnetized from bottom to top when the first center magnet 2211 is magnetized from top to bottom, which is not limited herein. That is, when the N pole of the first center magnet 2211 is up and the S pole is down, the N pole of the second center magnet 2213 and the side magnet 231 is down and the S pole is up, or when the N pole of the first center magnet 2211 is down and the S pole is up, the N pole of the second center magnet 2213 and the side magnet 231 is down and the S pole is down, which is not limited herein.

In an embodiment, the middle magnetic assembly 221 further includes a third center magnet 2214, the third center magnet 2214 is disposed between the first center magnet 2211 and the center magnetic conductive plate 2212, and/or the third center magnet 2214 is disposed between the second center magnet 2213 and the center magnetic conductive plate 2212, where a magnetization direction of the third center magnet 2214 is perpendicular to magnetization directions of the first center magnet 2211 and the second center magnet 2213.

In this embodiment, as shown in fig. 7 to 9, by disposing the third center magnet 2214 between the center magnetic conductive plate 2212 and the first center magnet 2211 and/or the second center magnet 2213, the magnetization direction of the third center magnet 2214 is perpendicular to the magnetization directions of the first center magnet 2211 and the second center magnet 2213, so that the middle magnetic assembly 221 forms a halbach magnetic array to generate a stronger magnetic field, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines of force passing through the voice coil 32, increasing the magnetic field force received by the voice coil 32, effectively improving the BL value, improving the sensitivity of the sound generating device 100, effectively improving the flatness of the BL curve (as shown in fig. 14), significantly improving the FR frequency response curve (as shown in fig. 15), and effectively reducing the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved.

It is understood that the third center magnet 2214 may be disposed between the first center magnet 2211 and the center magnetic plate 2212, or the third center magnet 2214 may be disposed between the second center magnet 2213 and the center magnetic plate 2212, or the third center magnet 2214 may be disposed between the first center magnet 2211 and the center magnetic plate 2212, and the third center magnet 2214 may be disposed between the second center magnet 2213 and the center magnetic plate 2212, which is not limited herein.

It should be noted that the third center magnet 2214 may be an integral square plate structure and disposed between the center magnetic conductive plate 2212 and the first center magnet 2211 and/or the second center magnet 2213, or the third center magnet 2214 includes a plurality of third center magnets 2214, which are adjacent and arranged in parallel between the center magnetic conductive plate 2212 and the first center magnet 2211 and/or the second center magnet 2213, so that the plurality of third center magnets 2214 cooperate to form a square plate structure, which is not limited herein.

In one embodiment, the halbach circuit 222 includes a first magnet 2221, a second magnet 2222, and a third magnet 2223 that are stacked, the first magnet 2221 is connected to the magnetic yoke 21, the first magnet 2221 and the third magnet 2223 are magnetized along a vibration direction of the vibration system 3, and the magnetization direction of the second magnet 2222 is perpendicular to the magnetization directions of the first magnet 2221 and the third magnet 2223.

In this embodiment, as shown in fig. 3 to 13, the halbach magnetic circuit 222 is arranged to be stacked on the first magnet 2221, the second magnet 2222 and the third magnet 2223 of the magnetic yoke 21, so that the magnetizing direction of the second magnet 2222 is perpendicular to the magnetizing directions of the first magnet 2221 and the third magnet 2223, and the halbach magnetic array is formed by using the first magnet 2221, the second magnet 2222 and the third magnet 2223 of the halbach magnetic circuit 222, so that a magnetic field with a higher magnetic field strength is formed, so that the halbach magnetic circuit 222 has a magnetic field enhancement side facing the magnetic gap 24 and a magnetic field weakening side far from the magnetic gap 24, and thus the magnetic field strength is further enhanced by overlapping with the magnetic field formed by the intermediate magnetic assembly 221, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines passing through the magnetic gap 32, increasing the magnetic field force received by the voice coil 32, effectively enhancing the BL value, and improving the sensitivity of the voice coil device 100, so that the sound effect and performance of the whole voice coil are better improved.

It will be appreciated that the first magnet 2221 and the third magnet 2223 are both magnetized in the vibration direction of the vibration system 3, that is, both magnetized in the movement direction of the voice coil 32. Optionally, the first magnet 2221 and the third magnet 2223 are both magnetized in the vertical direction. In the present embodiment, the magnetizing direction of the second magnet 2222 is perpendicular to the magnetizing directions of the first magnet 2221 and the third magnet 2223. Optionally, the first magnet 2221 and the third magnet 2223 of the halbach circuit 222 are magnetized in the vertical direction, the second magnet 2222 is magnetized in the horizontal direction, and the first center magnet 2211 and the second center magnet 2213 of the middle magnetic assembly 221 are magnetized in the vertical direction, so as to effectively overlap to form a magnetic field with a higher magnetic field strength.

Alternatively, the magnetizing direction of the first magnet 2221 is opposite to the magnetizing direction of the third magnet 2223. In the present embodiment, the magnetic pole of the first magnet 2221 on the side close to the second magnet 2222 is the same as the magnetic pole of the third magnet 2223 on the side close to the second magnet 2222.

In the present embodiment, the third magnet 2223 is magnetized from top to bottom when the first magnet 2221 is magnetized from bottom to top, or the third magnet 2223 is magnetized from bottom to top when the first magnet 2221 is magnetized from top to bottom, which is not limited herein. That is, the first magnet 2221 has the N pole up and the S pole down, and the third magnet 2223 has the N pole down and the S pole up, or the first magnet 2221 has the N pole down and the S pole up, and the third magnet 2223 has the N pole up and the S pole down, which are not limited herein.

In the present embodiment, the magnetizing direction of the first magnet 2221 is the same as the magnetizing direction of the first center magnet 2211, the magnetizing direction of the third magnet 2223 is the same as the magnetizing direction of the second center magnet 2213, so that the magnetic induction lines of the first center magnet 2211 and the second center magnet 2213 of the intermediate magnetic assembly 221 are concentrated on the center magnetic conductive plate 2212, and the magnetic induction lines of the first magnet 2221 and the third magnet 2223 of the halbach magnetic circuit 222 are concentrated on the second magnet 2222, so that the magnetic field with a stronger magnetic field strength generated by the intermediate magnetic assembly 221 overlaps the halbach magnetic circuit 222 to generate the magnetic field with a stronger magnetic field strength passing through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines passing through the voice coil 32, increasing the magnetic field force received by the voice coil 32, and effectively increasing the BL value.

It can be appreciated that, when the second magnet 2222 is magnetized in the horizontal direction, the polarity of the end of the second magnet 2222 away from the middle magnetic component 221 is the same as the polarity of the ends of the first magnet 2221 and the third magnet 2223 close to the second magnet 2222, and the magnetizing direction of the second magnet 2222 may be the direction from the voice coil 32 to the central magnetic conductive plate 2212, that is, the S-pole face of the second magnet 2222 faces the voice coil 32 and the n-pole face faces the central magnetic conductive plate 2212, or the magnetizing direction of the second magnet 2222 may be the direction from the central magnetic conductive plate 2212 to the voice coil 32, that is, the S-pole face of the second magnet 2222 faces the central magnetic conductive plate 2212 and the n-pole face faces the voice coil 32, which is not limited herein.

In the present embodiment, the magnetizing direction of the second magnet 2222 is the direction of the central magnetic conductive plate 2212 toward the voice coil 32, at this time, the first magnet 2221 of the halbach magnetic circuit 222 is magnetized from bottom to top, the third magnet 2223 is magnetized from top to bottom, the first central magnet 2211 of the middle magnetic assembly 221 is magnetized from bottom to top, and the second central magnet 2213 is magnetized from top to bottom. When the magnetizing direction of the second magnet 2222 is the direction of the voice coil 32 toward the central magnetic conductive plate 2212, the first magnet 2221 of the halbach magnetic circuit 222 is magnetized from top to bottom, the third magnet 2223 is magnetized from bottom to top, the first central magnet 2211 of the middle magnetic assembly 221 is magnetized from top to bottom, and the second central magnet 2213 is magnetized from bottom to top, which is not limited herein.

In one embodiment, as shown in fig. 10 and 11, the second magnets 2222 include a plurality of second magnets 2222 that are disposed adjacent and side by side and are located between the first magnets 2221 and the third magnets 2223.

It is understood that the second magnet 2222 of the halbach circuit 222 may be a square strip or plate structure, or the second magnet 2222 may include a plurality of second magnets 2222 arranged between the first magnet 2221 and the third magnet 2223 adjacently and in parallel, such that the plurality of second magnets 2222 cooperate to form a square strip or plate structure, which is not limited herein.

It should be noted that the first magnet 2221 of the halbach magnetic circuit 222 may be a square strip or plate structure, or the first magnet 2221 includes a plurality of first magnets 2221 arranged between the magnetic yoke 21 and the second magnet 2222 adjacently and in parallel, so that the plurality of first magnets 2221 cooperate to form a square strip or plate structure, which is not limited herein. The third magnet 2223 of the intermediate magnetic assembly 221 may be an integral square strip or plate structure, or the third magnet 2223 includes a plurality of third magnets 2223 arranged adjacent to and parallel to one side of the second magnet 2222 facing away from the first magnet 2221, such that the plurality of third magnets 2223 cooperate to form a square strip or plate structure, which is not limited herein.

Optionally, the first magnet 2221 of the halbach circuit 222 is integrally formed with the first center magnet 2211 of the intermediate magnetic assembly 221, which simplifies the processing and assembly steps. Optionally, the third magnet 2223 of the halbach circuit 222 and the second center magnet 2213 of the intermediate magnetic assembly 221 are integrally formed, which simplifies the processing steps and assembly steps, and is not limited herein.

In the present embodiment, the thickness of the first magnet 2221 in the vertical direction is optionally comparable to the thickness of the first center magnet 2211 in the vertical direction. That is, the thickness of the first magnet 2221 in the moving direction of the voice coil 32 is the same as the thickness of the first center magnet 2211 in the moving direction of the voice coil 32. Of course, in other embodiments, the thickness of the first magnet 2221 in the vertical direction may be different from the thickness of the first center magnet 2211 in the vertical direction, which is not limited herein.

Optionally, the thickness of the second magnet 2222 in the vertical direction is greater than or equal to the thickness of the central magnetic conductive plate 2212 in the vertical direction. That is, the thickness of the second magnet 2222 along the moving direction of the voice coil 32 is the same as the thickness of the central magnetic conductive plate 2212 along the moving direction of the voice coil 32.

In an embodiment, the thickness of the third magnet 2223 in the vertical direction is less than or equal to the thickness of the second center magnet 2213 in the vertical direction.

In the present embodiment, as shown in fig. 1, 3, 4, and 6 to 9, the thickness of the third magnet 2223 in the moving direction of the voice coil 32 is optionally smaller than the thickness of the second center magnet 2213 in the moving direction of the voice coil 32 to be the same. That is, a side surface of the second central magnet 2213 facing away from the central magnetism guiding plate 2212 protrudes from a side surface of the third magnet 2223 facing away from the second magnet 2222 to form a protruding portion.

It can be appreciated that the vibration system 3 is provided with a through structure through which the protrusion passes, so when the sound generating apparatus 100 is applied to an electronic device, in order to reduce the Z-directional height of the electronic device, the protrusion of the middle magnetic component 221 in the sound generating apparatus 100 may be abutted to the inner wall of the housing of the electronic device, without additional increase of the front cavity space, and the front sound cavity structure may be formed by using the height difference between the protrusion of the middle magnetic component 221 and the vibration system 3, which is not limited herein.

Of course, in other implementations, the thickness of the third magnet 2223 along the direction of movement of the voice coil 32 is optionally the same as the thickness of the second center magnet 2213 along the direction of movement of the voice coil 32. The diaphragm 31 of the vibration system 3 is disposed opposite to and spaced apart from the central magnetic portion 22, and is not limited thereto.

In one embodiment, at least a portion of the projection of the second magnet 2222 in the direction perpendicular to the vibration direction of the vibration system 3 coincides with the projection of the voice coil 32 in the direction perpendicular to the vibration direction of the vibration system 3.

Optionally, at least a portion of the projection of the second magnet 2222 in the horizontal direction coincides with the projection of the voice coil 32 in the horizontal direction. It will be appreciated that the arrangement is such that the voice coil 32 is in a relatively reasonable magnetic field to alleviate distortion of the audio output by the sound generating device 100 and improve the quality of the audio output by the sound generating device 100. Alternatively, the projection of the second magnet 2222 in the horizontal direction is located in the projection of the voice coil 32 in the horizontal direction.

In an embodiment, at least a portion of the projection of the central magnetic conductive plate 2212 in the direction perpendicular to the vibration direction of the vibration system 3 coincides with the projection of the second magnet 2222 in the direction perpendicular to the vibration direction of the vibration system 3.

Optionally, at least a portion of the projection of the central magnetic conductive plate 2212 in the horizontal direction coincides with the projection of the second magnet 2222 in the horizontal direction. It can be appreciated that the arrangement is such that the magnetic induction lines of the first central magnet 2211 and the second central magnet 2213 of the intermediate magnetic assembly 221 are concentrated on the central magnetic conductive plate 2212, and the magnetic induction lines of the first magnet 2221 and the third magnet 2223 of the halbach magnetic circuit 222 are concentrated on the second magnet 2222, and pass through the magnetic gap 24, so as to increase the density of the magnetic flux of the magnetic gap 24, and the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion condition of the audio output by the sound generating device 100, and improve the tone quality of the audio output by the sound generating device 100.

In an embodiment, the halbach magnetic circuit 222 is disposed around the outer periphery of the middle magnetic assembly 221, the second magnets 2222 form a closed integral ring structure, or the second magnets 2222 include a plurality of adjacent second magnets 2222 that are connected end to form a closed ring structure, or the second magnets 2222 include a plurality of second magnets 2222 disposed around the outer periphery of the middle magnetic assembly 221 with gaps between adjacent second magnets 2222.

In the present embodiment, halbach magnetic circuits 222 are provided on the outer circumferences of the intermediate magnetic assemblies 221. Alternatively, the halbach circuit 222 may be arranged in a ring shape, where the halbach circuit 222 is disposed around the outer periphery of the intermediate magnetic assembly 221, or the halbach circuit 222 may include a plurality of halbach circuits 222 disposed around the outer periphery of the intermediate magnetic assembly 221. Of course, in other embodiments, the halbach circuit 222 includes a plurality of halbach circuits 222 that are circumferentially spaced about the periphery of the intermediate magnetic assembly 221, i.e., with gaps between adjacent second magnets 2222.

It can be appreciated that when the halbach magnetic circuit 222 is arranged in a ring shape, the first magnet 2221, the second magnet 2222, and the third magnet 2223 are all arranged in a closed integral ring structure; or the first magnet 2221 is a closed integral annular structure, the second magnet 2222 and the third magnet 2223 each comprise a plurality of adjacent second magnets 2222 end to form a closed annular structure, and adjacent third magnets 2223 end to form a closed annular structure; or the second magnets 2222 form a closed integral ring structure, the first magnets 2221 and the third magnets 2223 each include a plurality of adjacent first magnets 2221 end to form a closed ring structure, and adjacent third magnets 2223 end to form a closed ring structure, or the third magnets 2223 form a closed integral ring structure, the first magnets 2221 and the second magnets 2222 each include a plurality of adjacent first magnets 2221 end to form a closed ring structure, and adjacent second magnets 2222 end to form a closed ring structure, which is not limited herein.

Of course, the halbach magnetic circuit 222 includes a plurality of halbach magnetic circuits 222 disposed around the outer periphery of the middle magnetic assembly 221, where the first magnet 2221, the second magnet 2222, and the third magnet 2223 each include a plurality of adjacent first magnets 2221 end to form a closed ring structure, adjacent second magnets 2222 end to form a closed ring structure, adjacent third magnets 2223 end to form a closed ring structure, and the first magnets 2221, the second magnets 2222, and the third magnets 2223 are all disposed in one-to-one correspondence, which is not limited herein. Or the halbach magnetic circuit 222 includes a plurality of halbach magnetic circuits 222 disposed around the outer periphery of the middle magnetic assembly 221, where the first magnet 2221, the second magnet 2222, and the third magnet 2223 each include a plurality of adjacent first magnets 2221 spaced to form a ring structure with a gap, adjacent second magnets 2222 spaced to form a ring structure with a gap, and adjacent third magnets 2223 spaced to form a ring structure with a gap, and the first magnets 2221, the second magnets 2222, and the third magnets 2223 are all disposed in one-to-one correspondence, which is not limited herein.

In an embodiment, the thickness of the halbach magnetic circuit 222 in the vertical direction is smaller than the thickness of the middle magnetic component 221 in the vertical direction, the diaphragm 31 is annular, the inner periphery of the diaphragm 31 is fixed on the end face of the halbach magnetic circuit 222 facing away from the magnetic yoke 21, and further, the top face of the diaphragm 31 facing away from the magnetic yoke 21 is not higher than the top face of the middle magnetic component 221 facing away from the magnetic yoke 21. In this way, the overall thickness of the product can be reduced.

In an embodiment, the halbach circuit 222 further includes a first magnetic conductive plate 2224, the first magnetic conductive plate 2224 is disposed between the first magnet 2221 and the second magnet 2222, and/or the first magnetic conductive plate 2224 is disposed between the third magnet 2223 and the second magnet 2222, and/or the first magnetic conductive plate 2224 is disposed adjacent to and side by side of the second magnet 2222 and between the first magnet 2221 and the third magnet 2223.

In this embodiment, as shown in fig. 7 to 13, by disposing the first magnetic conductive plate 2224 between the second magnet 2222 and the first magnet 2221 and/or the third magnet 2223, the halbach magnetic circuit 222 can generate a stronger magnetic field, so as to increase the density of the magnetic flux of the magnetic gap 24, increase the number of magnetic lines of force passing through the voice coil 32, increase the magnetic field force received by the voice coil 32, effectively increase the BL value, increase the sensitivity of the sound generating device 100, and better promote the sound effect and performance of the whole machine.

The first magnetic conductive plate 2224 may be provided between the first magnet 2221 and the second magnet 2222, or the first magnetic conductive plate 2224 may be provided between the third magnet 2223 and the second magnet 2222, or the first magnetic conductive plate 2224 may be provided between the first magnet 2221 and the second magnet 2222, while the first magnetic conductive plate 2224 may be provided between the third magnet 2223 and the second magnet 2222, which is not limited herein.

Of course, in other embodiments, as shown in fig. 10 to 13, the first magnetic conductive plate 2224 may be disposed adjacent to and side by side with the second magnet 2222, and located between the first magnet 2221 and the third magnet 2223, which is not limited herein. Alternatively, the first magnetic conductive plate 2224 is disposed adjacent to and side by side with the second magnet 2222 alternately, and is located between the first magnet 2221 and the third magnet 2223.

It should be noted that the first magnetic conductive plate 2224 may be an integral square bar-shaped or plate-shaped structure and be disposed between the second magnet 2222 and the first magnet 2221 and/or the third magnet 2223, or the first magnetic conductive plate 2224 includes a plurality of first magnetic conductive plates 2224 that are adjacent and arranged in parallel between the second magnet 2222 and the first magnet 2221 and/or the third magnet 2223, so that the plurality of first magnetic conductive plates 2224 cooperate to form a square plate-shaped structure, which is not limited herein.

Optionally, the first magnetic conductive plate 2224 is optionally integrally formed with the central magnetic conductive plate 2212, which can effectively simplify the processing steps and the assembling steps.

In an embodiment, the middle magnetic assembly 221 further includes a third center magnet 2214, the third center magnet 2214 is disposed between the center magnetic conductive plate 2212 and the first center magnet 2211 and/or the second center magnet 2213, a magnetization direction of the third center magnet 2214 is perpendicular to magnetization directions of the first center magnet 2211 and the second center magnet 2213, and the third center magnet 2214 and the second magnet 2222 are integrally formed. It will be appreciated that the processing steps and assembly steps are thus effectively simplified.

In one embodiment, the middle magnetic assembly 221 is square, the middle magnetic assembly 221 has a short axis side and a long axis side which are connected end to end, the two short axis sides of the middle magnetic assembly 221 are respectively provided with halbach magnetic circuits 222, and/or the two long axis sides of the middle magnetic assembly 221 are respectively provided with halbach magnetic circuits 222.

It will be appreciated that halbach circuit 222 is disposed on at least one side of intermediate magnetic assembly 221, i.e., halbach circuit 222 is disposed on one short axis or one long axis of intermediate magnetic assembly 221 when halbach circuit 222 is one. When the halbach circuits 222 include two, the two halbach circuits 222 are respectively provided on two short axis sides of the intermediate magnetic assembly 221, or the two halbach circuits 222 are respectively provided on two long axis sides of the intermediate magnetic assembly 221. When the halbach circuits 222 include three, the three halbach circuits 222 are respectively provided on two short-axis sides and one long-axis side of the intermediate magnetic assembly 221, or the three halbach circuits 222 are respectively provided on two long-axis sides and one short-axis side of the intermediate magnetic assembly 221. When the halbach magnetic circuits 222 include four pieces, the four halbach magnetic circuits 222 are disposed corresponding to one side of the intermediate magnetic assembly 221, that is, the halbach magnetic circuits 222 are disposed on two short-axis sides of the intermediate magnetic assembly 221, and the halbach magnetic circuits 222 are disposed on two long-axis sides of the intermediate magnetic assembly 221, which is not limited herein.

In one embodiment, as shown in fig. 1 to 5, the sound generating device 100 further includes a housing 1, the side magnetic portion 23 includes a side magnet 231 and a side magnetic plate 232 that are stacked, the side magnet 231 is connected to the magnetic yoke 21, one end of the housing 1 is connected to the side magnetic plate 232, and the other end of the housing 1 is connected to the periphery of the diaphragm 31.

Alternatively, the side magnetic plate 232 is integrally formed with the housing 1. It can be understood that when the housing 1 is a plastic part, the side magnetic plate 232 and the housing 1 are integrally injection molded, and when the housing 1 is a metal part, the side magnetic plate 232 and the housing 1 are molded by punching, blanking or riveting, which is not limited herein. The arrangement can effectively simplify the processing steps and improve the heat dissipation effect.

In one embodiment, the diaphragm 31 is annular, the inner periphery of the diaphragm 31 is fixed to the magnetic circuit 2, one end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is suspended in the magnetic gap 24.

In this embodiment, the diaphragm 31 includes an inner ring portion 311, a first ring portion 313 disposed around the inner ring portion 311, a flat portion 314 disposed around the first ring portion 313, a second ring portion 315 disposed around the flat portion 314, and a fixing portion 316 connected to the outer side of the second ring portion 315, the fixing portion 316 is connected to the housing 1, and one end of the voice coil 32 is directly or indirectly connected to the flat portion 314. Optionally, the first folding ring 313 and the second folding ring 315 have a convex hull structure that is convex upward or a concave structure that is concave downward, which is not limited herein.

In order to strengthen the structural strength of the central portion of the diaphragm 31, the vibration system 3 further includes a vibration plate provided at the central portion of the diaphragm 31. It will be appreciated that, in order to reduce the weight of the vibration system 3, the center portion of the diaphragm 31 is provided with a hollow hole, and the vibration plate is connected to the center portion and covers the hollow hole. Optionally, a step surface is formed on the periphery of the vibration plate, and one side of the vibration film 31 adjacent to the hollowed hole is supported and connected to the step surface, and the step surface is located between the voice coil 32 and the vibration film 31. It can be understood that by providing the stepped surface at the periphery of the vibration plate so that the stepped surface is recessed toward one side of the voice coil 32, when the central portion of the diaphragm 31 is ensured to be lap-supported on the stepped surface of the vibration plate, the upper surface of the central portion of the diaphragm 31 is surely flush with the upper surface of the vibration plate, so that the assembly structure is made more compact, and the vibration performance of the whole diaphragm 31 is ensured.

In one embodiment, the vibration system 3 further includes a frame 33, and the voice coil 32 is connected to the diaphragm 31 through the frame 33.

In this embodiment, as shown in fig. 3 and 4, by providing the frame 33, the voice coil 32 is connected with the diaphragm 31 through the frame 33, so that the voice coil 32 is ensured to be in a more reasonable magnetic field, that is, a region with the largest magnetic flux density, thereby effectively improving the BL value.

In one embodiment, the frame 33 includes a main body 331 and a connecting portion 332 connected to a periphery of the main body 331, the main body 331 is disposed between the diaphragm 31 and the sound tube 32, the vibration system 3 further includes a centering pad 34, the centering pad 34 includes an outer fixing portion 341, an inner fixing portion 342, and a spring wall portion 343 connecting the outer fixing portion 341 and the inner fixing portion 342, the outer fixing portion 341 is connected to the housing 1 and/or the side magnetic portion 23, and the inner fixing portion 342 is connected to the connecting portion 332.

In this embodiment, as shown in fig. 2 to 5, the main body 331 of the skeleton 33 may be selected to have a ring-shaped structure, that is, the main body 331 is provided in a ring shape, and the main body 331 is provided around the central magnetic portion 22. Alternatively, the main body 331 is disposed in a rectangular ring shape, the connection portion 332 includes a plurality of connection portions 332, and the plurality of connection portions 332 are disposed at four corners of the main body 331.

It can be appreciated that by providing the centering support 34, the lead wire of the voice coil 32 can be connected and conducted with an external circuit by using the centering support 34, and the problem of swinging or polarization of the voice coil 32 during the vibration process can be avoided by using the centering support 34. Optionally, the inner fixing portion 342 is provided with an inner pad, to which the lead wire of the voice coil 32 extends along the connection portion 332.

In an embodiment, the centering support 34 includes a plurality of centering support 34, one ends of the plurality of centering support 34 are respectively connected to the connection portion 332 of the frame 33, and the leads of the voice coil 32 extend to the centering support 34 along the connection portion 332, and the other ends of the plurality of centering support 34 are respectively connected to the housing 1 and/or the side magnetic portion 23, so that the operational stability of the vibration system 3 can be improved.

Optionally, the plurality of centering struts 34 are correspondingly distributed along the long axis direction and/or the short axis direction of the magnetic circuit system 2 and/or the diagonal or four corner positions of the magnetic circuit system 2. It can be understood that the plurality of centering support pieces 34 may be symmetrically distributed along the long axis direction of the magnetic circuit system 2, the plurality of centering support pieces 34 may also be symmetrically distributed along the short axis direction of the magnetic circuit system 2, the plurality of centering support pieces 34 may also be correspondingly disposed at opposite angles of the magnetic circuit system 2, and the plurality of centering support pieces 34 may also be correspondingly disposed at four corners of the magnetic circuit system 2. Of course, in other embodiments, the plurality of centering support pieces 34 may be correspondingly distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, which is not limited herein.

Alternatively, the centering support 34 may include two or four, so that the voice coil 32 can be connected to an external circuit by the centering support 34, and the vibration balance of the sound generating apparatus 100 can be ensured.

It can be understood that when there are two centering support pieces 34, the two centering support pieces 34 are arranged at intervals along the long axis direction of the magnetic circuit system 2, or the two centering support pieces 34 are arranged at intervals along the short axis direction of the magnetic circuit system 2, which is not limited herein. Of course, when the number of the centering support pieces 34 is four, the four centering support pieces 34 may be correspondingly disposed along four corners of the magnetic circuit system 2. The present utility model is not particularly limited herein with respect to the arrangement of centering tabs 34.

In an embodiment, each centering support 34 includes an outer fixing portion 341, a spring wall portion 343, and an inner fixing portion 342 connected in sequence, the outer fixing portion 341 is connected to the housing 1 and/or the side magnetic portion 23, the inner fixing portion 342 is connected to the connecting portion 332, the inner fixing portion 342 is provided with an inner bonding pad, and the lead wire of the voice coil 32 extends to the inner bonding pad along the connecting portion 332.

In this embodiment, as shown in fig. 2, 3 and 5, the outer fixing portion 341, the elastic wall portion 343 and the inner fixing portion 342 of the centering support 34 may be selected as an integrally formed structure. Thus, the structural strength of the centering support 34 can be effectively ensured, and the processing steps of the centering support 34 are simplified. It will be appreciated that the spring wall portion 343 has at least one bend in order to ensure deformability of the centering web 34.

In one embodiment, as shown in fig. 2, 3 and 5, the outer fixing portion 341, the elastic wall portion 343 and the inner fixing portion 342 of the centering bracket 34 may be located on the same plane. Of course, in other embodiments, the outer fixing portion 341 and the inner fixing portion 342 of the centering bracket 34 may also be located on different planes. It can be appreciated that the centering support 34 is used to connect an external circuit with the voice coil 32, and the centering support 34 can be used to effectively avoid the problem of oscillation or polarization of the voice coil 32 during the vibration process.

In an embodiment, the diaphragm 31 includes an inner ring portion 311, a first ring portion 313 disposed around the inner ring portion 311, a straight portion 314 disposed around the first ring portion 313, a second ring portion 315 disposed around the straight portion 314, and a fixing portion 316 connected to an outer side of the second ring portion 315, the fixing portion 316 is connected to the housing 1, the straight portion 314 is connected to the frame 33, the inner ring portion 311 is formed with an inner ring hole 312, the inner ring portion 311 is connected to the central magnetic portion 22, and at least a portion of the intermediate magnetic assembly 221 is protruded from the inner ring hole 312.

In this embodiment, as shown in fig. 1, 3 and 4, the inner ring portion 311, the first ring portion 313, the flat portion 314, the second ring portion 315 and the fixing portion 316 of the diaphragm 31 may be selected as an integrally formed structure, so as to ensure the vibration performance and structural strength of the diaphragm 31.

It will be appreciated that the first and second refraction rings 313 and 315 of the diaphragm 31 have a convex hull structure that is convex upward or a concave structure that is concave downward, which are not limited herein. Alternatively, the protruding direction of the first collar 313 is opposite to the protruding direction of the second collar 315. In this embodiment, the first folding ring 313 protrudes in a direction away from the magnetic yoke 21, the second folding ring 315 protrudes in a direction close to the magnetic yoke 21, that is, the protruding direction of the first folding ring 313 is upward, so that interference with the central magnetic portion 22 can be effectively avoided, and the protruding direction of the second folding ring 315 is downward, so that when the sound generating apparatus 100 is applied to an electronic device, a front acoustic cavity structure can be formed by using a height difference between the first folding ring 313 and the second folding ring 315 of the diaphragm 31, so that a Z-directional height dimension of the electronic device can be effectively reduced.

In the present embodiment, the protruding portion of the central magnetic portion 22 protrudes from the inner ring hole 312, that is, the inner ring portion 311 of the diaphragm 31 is connected to the halbach magnetic circuit 222 of the central magnetic portion 22.

In one embodiment, as shown in fig. 3 and 4, the diaphragm 31 further includes a reinforcing portion 318, and the reinforcing portion 318 is disposed between the straight portion 314 and the frame 33. It can be appreciated that by providing the reinforcement portion 318, the structural strength of the straight portion 314 of the diaphragm 31 can be effectively enhanced, so as to improve the connection stability of the voice coil 32, and avoid the diaphragm 31 from tearing when the voice coil 32 drives the diaphragm 31 to vibrate.

In an embodiment, as shown in fig. 1 to 5, an end of the fixing portion 316 away from the second folding ring 315 is folded and extended toward the housing 1 to form a folding portion 317, and the folding portion 317 is connected to an outer wall of the housing 1. It can be appreciated that the bending portion 317 is formed by bending down at the outer side of the fixing portion 316, so that the bending portion 317 is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1 and improving the connection stability and sealing performance.

The utility model also provides electronic equipment, which comprises the sounding device 100. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and because the electronic device adopts all the technical solutions of all the foregoing embodiments, the sound generating device at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein.

In an embodiment, the electronic device further includes a device housing, the device housing has a mounting space, and the sound generating apparatus 100 is disposed in the mounting space of the device housing.

In this embodiment, the electronic apparatus further includes a flexible circuit board, one end of which is electrically connected to the sound generating device 100, and the other end of which is used for connecting to an external power source. It will be appreciated that the flexible circuit board is used to connect and conduct an external circuit to the sound emitting device 100. The flexible circuit board is provided with an inner bonding pad and an outer bonding pad, the inner bonding pad of the flexible circuit board is connected and conducted with the sound generating device 100, and the outer bonding pad of the flexible circuit board is used for being connected with an external terminal.

In this embodiment, the device housing has an installation space, the sound generating device 100 is disposed in the installation space of the device housing, and at least one end of the flexible circuit board connected with the sound generating device 100 is disposed in the installation space of the device housing. Of course, in other embodiments, the flexible circuit board may be disposed entirely in the installation space of the device housing, which is not limited herein.

It is understood that the electronic device may be an earphone, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited herein. In the electronic device, the sound generating apparatus 100 may be assembled into a housing of the electronic device in a module manner, or may be assembled into a housing of the electronic device in a single body. The electronic device may be a mobile phone, MP3, MP4, tablet, headset, wearable device, etc., which are not listed here.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A sound emitting device (100), characterized in that the sound emitting device (100) comprises:

A vibration system (3), the vibration system (3) comprising a diaphragm (31) and a voice coil (32) connected to the diaphragm (31);

Magnetic circuit (2), magnetic circuit (2) include magnetic yoke (21) and locate central magnetic portion (22) and limit magnetic portion (23) of magnetic yoke (21), limit magnetic portion (23) are located the outside of central magnetic portion (22), and with central magnetic portion (22) interval is in order to form magnetic gap (24), voice coil (32) with magnetic gap (24) correspond the setting, central magnetic portion (22) include middle magnetic subassembly (221) and halbach magnetic circuit (222), halbach magnetic circuit (222) are located middle magnetic subassembly (221) are along perpendicular to at least one side of the vibration direction of vibration system (3), middle magnetic subassembly (221) are including range upon range of first central magnet (2211) and central magnetic conduction board (2212) that set up, first central magnet (2211) connect in magnetic yoke (21).

2. The sound generating apparatus (100) according to claim 1, wherein the intermediate magnetic assembly (221) further comprises a second center magnet (2213), the second center magnet (2213) being arranged at a side of the center magnetically permeable plate (2212) facing away from the first center magnet (2211);

The first center magnet (2211) and the second center magnet (2213) are magnetized along the vibration direction of the vibration system (3), and the magnetization direction of the first center magnet (2211) is opposite to the magnetization direction of the second center magnet (2213).

3. The sound generating apparatus (100) according to claim 2, wherein the intermediate magnetic assembly (221) further comprises a third center magnet (2214), wherein the third center magnet (2214) is disposed between the first center magnet (2211) and the center magnetically permeable plate (2212), and/or wherein the third center magnet (2214) is disposed between the second center magnet (2213) and the center magnetically permeable plate (2212), and wherein a magnetization direction of the third center magnet (2214) is perpendicular to magnetization directions of the first center magnet (2211) and the second center magnet (2213);

And/or, the central magnetic conduction plate (2212) comprises a plurality of central magnetic conduction plates (2212) which are adjacent and arranged side by side and are positioned between the first central magnet (2211) and the second central magnet (2213).

4. The sound generating apparatus (100) according to claim 2, wherein the side magnetic portion (23) includes a side magnet (231) and a side magnetic conductive plate (232) which are stacked, the side magnet (231) being connected to the magnetic conductive yoke (21);

the first center magnet (2211), the second center magnet (2213) and the side magnet (231) are magnetized along the vibration direction of the vibration system (3), the magnetization direction of the first center magnet (2211) is opposite to the magnetization direction of the side magnet (231) of the side magnet part (23), and the magnetization direction of the second center magnet (2213) is identical to the magnetization direction of the side magnet (231) of the side magnet part (23).

5. The sound generating apparatus (100) according to claim 2, wherein the halbach magnetic circuit (222) includes a first magnet (2221), a second magnet (2222), and a third magnet (2223) that are stacked, the first magnet (2221) being connected to the magnetic yoke (21);

The first magnet (2221) and the third magnet (2223) are magnetized along the vibration direction of the vibration system (3), and the magnetization direction of the second magnet (2222) is perpendicular to the magnetization direction of the first magnet (2221) and the third magnet (2223).

6. The sound emitting device (100) of claim 5, wherein the direction of magnetization of the first magnet (2221) is opposite to the direction of magnetization of the third magnet (2223);

And/or, the magnetizing direction of the first magnet (2221) is the same as the magnetizing direction of the first central magnet (2211), and the magnetizing direction of the third magnet (2223) is the same as the magnetizing direction of the second central magnet (2213);

And/or the polarity of the end, far away from the middle magnetic assembly (221), of the second magnet (2222) is the same as the polarity of the ends, close to the second magnet (2222), of the first magnet (2221) and the third magnet (2223);

And/or, the second magnet (2222) includes a plurality of second magnets (2222) that are adjacent and arranged side by side, and are located between the first magnet (2221) and the third magnet (2223).

7. The sound emitting device (100) of claim 5, wherein the first magnet (2221) is integrally formed with the first center magnet (2211);

And/or the thickness of the first magnet (2221) along the vertical direction is equivalent to the thickness of the first central magnet (2211) along the vertical direction;

And/or, the third magnet (2223) and the second center magnet (2213) are in an integrated structure;

And/or, the thickness of the third magnet (2223) along the vertical direction is smaller than or equal to the thickness of the second central magnet (2213) along the vertical direction;

And/or, the thickness of the second magnet (2222) along the vertical direction is greater than or equal to the thickness of the central magnetic conduction plate (2212) along the vertical direction.

8. The sound emitting device (100) according to claim 5, wherein a projection of at least part of the second magnet (2222) in a direction perpendicular to the vibration direction of the vibration system (3) coincides with a projection of the voice coil (32) in a direction perpendicular to the vibration direction of the vibration system (3);

and/or, at least part of the projection of the central magnetic conduction plate (2212) along the vibration direction perpendicular to the vibration system (3) coincides with the projection of the second magnet (2222) along the vibration direction perpendicular to the vibration system (3).

9. The sound generating apparatus (100) of claim 5, wherein the halbach magnetic circuit (222) is circumferentially arranged around the outer periphery of the intermediate magnetic assembly (221);

The second magnets (2222) form a closed integral annular structure, or the second magnets (2222) comprise a plurality of adjacent second magnets (2222) which are connected end to form a closed annular structure, or the second magnets (2222) comprise a plurality of second magnets (2222) which are circumferentially arranged on the periphery of the middle magnetic assembly (221), and gaps are reserved between the adjacent second magnets (2222).

10. The sound emitting device (100) of claim 5, wherein the halbach magnetic circuit (222) further comprises a first magnetically permeable plate (2224);

The first magnetic conduction plate (2224) is arranged between the first magnet (2221) and the second magnet (2222), and/or the first magnetic conduction plate (2224) is arranged between the third magnet (2223) and the second magnet (2222), and/or the first magnetic conduction plate (2224) is adjacent to the second magnet (2222) and arranged side by side, and is arranged between the first magnet (2221) and the third magnet (2223).

11. The sound generating apparatus (100) according to claim 10, wherein the first magnetically permeable plate (2224) is arranged adjacent to and side by side with the second magnet (2222) and is located between the first magnet (2221) and the third magnet (2223);

And/or, the first magnetic conduction plate (2224) and the central magnetic conduction plate (2212) are in an integrated structure;

And/or the middle magnetic assembly (221) further comprises a third center magnet (2214), wherein the third center magnet (2214) is arranged between the center magnetic conduction plate (2212) and the first center magnet (2211) and/or the second center magnet (2213), the magnetizing direction of the third center magnet (2214) is perpendicular to the magnetizing directions of the first center magnet (2211) and the second center magnet (2213), and the third center magnet (2214) and the second magnet (2222) are of an integrated structure.

12. The sound emitting device (100) of claim 1, wherein the intermediate magnetic assembly (221) is square, the intermediate magnetic assembly (221) having short and long axis sides that are end-to-end;

The halbach magnetic circuits (222) are respectively arranged on the two short-axis sides of the middle magnetic assembly (221), and/or the halbach magnetic circuits (222) are respectively arranged on the two long-axis sides of the middle magnetic assembly (221).

13. The sound generating device (100) according to any one of claims 1 to 12, wherein the sound generating device (100) further comprises a housing (1), the side magnetic portion (23) comprises a side magnet (231) and a side magnetic conductive plate (232) which are stacked, the side magnet (231) is connected to the magnetic conductive yoke (21), one end of the housing (1) is connected to the side magnetic conductive plate (232), and the other end of the housing (1) is connected to the periphery of the diaphragm (31).

14. The sound emitting device (100) according to claim 13, wherein the side magnetically permeable plate (232) is of unitary construction with the housing (1);

And/or the vibrating diaphragm (31) is annular, the inner periphery of the vibrating diaphragm (31) is fixed on the magnetic circuit system (2), one end of the voice coil (32) is connected with the vibrating diaphragm (31), and the other end of the voice coil (32) is suspended in the magnetic gap (24).

15. The sound generating apparatus (100) according to claim 13, wherein the vibration system (3) further comprises a frame (33), and the voice coil (32) is connected to the diaphragm (31) through the frame (33).

16. The sound generating apparatus (100) as claimed in claim 15, wherein said frame (33) comprises a main body portion (331) and a connecting portion (332) connected to a periphery of said main body portion (331), said main body portion (331) being provided between said diaphragm (31) and said voice coil (32);

The vibration system (3) further comprises a centering support piece (34), the centering support piece (34) comprises an outer fixing portion (341), an inner fixing portion (342) and a spring wall portion (343) for connecting the outer fixing portion (341) and the inner fixing portion (342), the outer fixing portion (341) is connected with the shell (1) and/or the side magnetic portion (23), and the inner fixing portion (342) is connected with the connecting portion (332).

17. The sound generating apparatus (100) according to claim 15, wherein the diaphragm (31) comprises an inner ring portion (311), a first ring (313) surrounding the inner ring portion (311), a straight portion (314) surrounding the first ring (313), a second ring (315) surrounding the straight portion (314), and a fixing portion (316) connected to an outer side of the second ring (315), the fixing portion (316) is connected to the housing (1), the straight portion (314) is connected to the frame (33), the inner ring portion (311) is formed with an inner ring hole (312), the inner ring portion (311) is connected to the central magnetic portion (22), and at least a portion of the intermediate magnetic assembly (221) is protruded from the inner ring hole (312).

18. The sound generating apparatus (100) as claimed in claim 17, characterized in that the inner ring portion (311), the first ring (313), the straight portion (314), the second ring (315) and the fixing portion (316) are of an integrally formed structure;

And/or the first folding ring (313) protrudes towards the direction away from the magnetic conductive yoke (21), and the second folding ring (315) protrudes towards the direction close to the magnetic conductive yoke (21);

And/or, the vibrating diaphragm (31) further comprises a reinforcing part (318), and the reinforcing part (318) is arranged between the straight part (314) and the framework (33);

And/or, one end of the fixing part (316) far away from the second folding ring (315) is folded towards the shell (1) to form a folding part (317), and the folding part (317) is connected to the outer wall of the shell (1).

19. An electronic device, characterized in that the electronic device comprises a sound emitting arrangement (100) according to any one of claims 1 to 18.