CN118678270B

CN118678270B - Sound producing device and electronic equipment

Info

Publication number: CN118678270B
Application number: CN202411162310.3A
Authority: CN
Inventors: 姜龙; 于龙欣; 朱本超; 郭翔
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2024-08-23
Filing date: 2024-08-23
Publication date: 2025-01-07
Anticipated expiration: 2044-08-23
Also published as: CN118678270A

Abstract

The present invention discloses a sound-generating device and an electronic device, and relates to the technical field of electroacoustic transducer. The sound-generating device comprises a magnetic circuit system and a vibration system. The magnetic circuit system comprises a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke. The side magnetic part is located outside the central magnetic part and is spaced from the central magnetic part to form a magnetic gap. The central magnetic part comprises a first magnetic group, a second magnetic group and a third magnetic group arranged in layers. The first magnetic group is connected to the magnetic yoke. The vibration system comprises a diaphragm and a voice coil connected to the diaphragm. The voice coil is arranged corresponding to the magnetic gap. The first magnetic group and the third magnetic group are magnetized along a vibration direction perpendicular to the vibration system, and the second magnetic group is magnetized along the vibration direction of the vibration system, so that the central magnetic part forms a Halbach magnetic circuit. The sound-generating device of the present invention 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, thereby improving the sound quality and performance of the whole machine.

Description

Sound producing device and electronic equipment

Technical Field

The present invention 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 Invention

The main purpose of the invention 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 invention provides a sound emitting device including:

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 positioned on the outer side of the central magnetic part and is spaced from the central magnetic part to form a magnetic gap, the central magnetic part comprises a first magnetic group, a second magnetic group and a third magnetic group which are arranged in a stacked mode, and the first magnetic group is connected with the magnetic yoke;

the vibration system comprises a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, and the voice coil is correspondingly arranged with the magnetic gap;

The first magnetic group and the third magnetic group are magnetized along the vibration direction perpendicular to the vibration system, and the second magnetic group is magnetized along the vibration direction of the vibration system, so that the center magnetic part forms a halbach magnetic circuit.

In an embodiment, the edge of the third magnetic group is provided with an avoidance structure, and the avoidance structure is at least one of an inclined plane, a round angle, a chamfer angle and a step structure;

The avoidance structure is arranged around the periphery of one side of the third magnetic group, which is opposite to the second magnetic group, or the avoidance structure comprises a plurality of avoidance structures which are arranged at intervals and around the periphery of one side of the third magnetic group, which is opposite to the second magnetic group, or the avoidance structure comprises a plurality of avoidance structures, the adjacent avoidance structures are connected end to form a closed annular structure and around the periphery of one side of the third magnetic group, which is opposite to the second magnetic group;

And/or an included angle formed by the avoidance structure and the surface of the third magnetic group, which is opposite to one side of the second magnetic group, is larger than 90 degrees and smaller than 180 degrees.

In an embodiment, at least part of the projection of the third magnetic group along the direction perpendicular to the vibration direction of the vibration system coincides with the projection of the voice coil along the direction perpendicular to the vibration direction of the vibration system.

In an embodiment, the magnetizing direction of the first magnetic group is opposite to the magnetizing direction of the third magnetic group;

The magnetizing direction of the first magnetic group is along the peripheral edge of the first magnetic group to the central direction of the first magnetic group, the magnetizing direction of the third magnetic group is along the central edge of the third magnetic group to the peripheral edge direction of the third magnetic group, or the first magnetic group and the third magnetic group are provided with a first axis and a second axis which are perpendicular to the vibration direction of the vibration system, the first axis and the second axis are perpendicular to each other, the magnetizing direction of the first magnetic group is along the first axis and/or the second axis, and the magnetizing direction of the third magnetic group is along the second axis and/or the first axis;

The magnetic pole of the inner side of the first magnetic group close to the center is the same as the magnetic pole of the side of the second magnetic group far away from the first magnetic group, and the magnetic pole of the inner side of the first magnetic group close to the center is opposite to the magnetic pole of the inner side of the third magnetic group close to the center.

In one embodiment, the first magnetic group comprises a first magnet with an integral plate-shaped structure, and a first through hole is formed in the center of the first magnet with the plate-shaped structure;

The third magnetic group comprises a third magnet with an integral plate-shaped structure, and a second through hole is formed in the center of the third magnet with the plate-shaped structure.

In one embodiment, the voice coil is rectangular and annular, and has long sides and short sides connected end to end;

the first magnetic group comprises two first magnets, the two first magnets are adjacent and arranged in parallel along the direction of the long side, the two first magnets magnetize along the direction of the long side, and the magnetizing directions of the two first magnets are opposite;

or, the first magnetic group comprises two first magnets, the two first magnets are adjacent and arranged in parallel along the direction of the short side, the two first magnets magnetize along the direction of the short side, and the magnetizing directions of the two first magnets are opposite;

Or, the first magnetic group comprises four first magnets, two first magnets are adjacent and arranged in parallel along the direction of the short side, the other two first magnets are arranged at two ends of the two first magnets along the direction of the long side, the four first magnets are magnetized along the direction of the short side and the direction of the long side respectively, the magnetizing directions of the two first magnets arranged along the direction of the short side are opposite, and the magnetizing directions of the other two first magnets arranged along the direction of the long side are opposite;

Or, the first magnet group is divided along two diagonal lines to form four first magnets, two first magnets are arranged in parallel along the direction of the short side, the other two first magnets are arranged in parallel along the direction of the long side, the four first magnets are magnetized along the direction of the short side and the direction of the long side respectively, the magnetizing directions of the two first magnets arranged along the direction of the short side are opposite, and the magnetizing directions of the other two first magnets arranged along the direction of the long side are opposite.

In one embodiment, the second magnetic group includes a second magnet of unitary plate-like structure;

or the second magnetic group comprises a plurality of second magnets, wherein the second magnets are adjacently arranged and are positioned between the first magnetic group and the third magnetic group, the second magnets magnetize along the vibration direction of the vibration system, and the magnetizing directions of the second magnets are the same.

The third magnetic group comprises two third magnets, the two third magnets are adjacent and arranged in parallel along the direction of the long side, the two third magnets magnetize along the direction of the long side, and the magnetizing directions of the two third magnets are opposite;

or the third magnetic group comprises two third magnets, the two third magnets are adjacent and arranged in parallel along the direction of the short side, the two third magnets magnetize along the direction of the short side, and the magnetizing directions of the two third magnets are opposite;

Or, the third magnetic group comprises four third magnets, two third magnets are adjacent and arranged in parallel along the direction of the short side, the other two third magnets are arranged at two ends of the two third magnets along the direction of the long side, the four third magnets are magnetized along the direction of the short side and the direction of the long side respectively, the magnetizing directions of the two third magnets arranged along the direction of the short side are opposite, and the magnetizing directions of the other two third magnets arranged along the direction of the long side are opposite;

or, the third magnet group is divided along two diagonal lines to form four third magnets, two third magnets are arranged in parallel along the direction of the short side, the other two third magnets are arranged in parallel along the direction of the long side, the four third magnets are magnetized along the direction of the short side and the direction of the long side respectively, the magnetizing directions of the two third magnets arranged along the direction of the short side are opposite, and the magnetizing directions of the other two third magnets arranged along the direction of the long side are opposite.

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 second magnetic group and the side magnets magnetize along the vibration direction of the vibration system, and the magnetizing direction of the second magnetic group is opposite to the magnetizing direction of the side magnets of the side magnetic part.

In an embodiment, the sound generating device further comprises a housing, one end of the housing is connected with the side magnetic conductive 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 one embodiment, the vibrating diaphragm includes an inner ring portion, a first ring-shaped portion surrounding the inner ring portion, a straight portion surrounding the first ring-shaped portion, a second ring-shaped portion surrounding the straight portion, and a fixing portion connected to the outer side of the second ring-shaped portion, wherein the fixing portion is connected to the housing, the straight portion is directly or indirectly connected to the voice coil, and the inner ring portion is connected to the third magnetic group;

The inner ring part is flat plate-shaped and is attached to the third magnetic group, or an inner ring hole is formed in the inner ring part.

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, and the reinforcing part is arranged on the straight part;

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 invention 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 yoke, 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 from the central magnetic part to form a magnetic gap, and the voice coil of the vibration system is arranged corresponding to the magnetic gap, so that current is introduced into the voice coil, and 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 center magnetic part is arranged to be laminated to the first magnetic group, the second magnetic group and the third magnetic group of the magnetic yoke, so that the first magnetic group and the third magnetic group are magnetized along the vibration direction perpendicular to the vibration system, and the second magnetic group is magnetized along the vibration direction of the vibration system, so that the center magnetic part forms a halbach magnetic circuit, the halbach magnetic circuit formed by the center magnetic part is utilized, the magnetic field intensity is effectively improved, the density of magnetic flux of a magnetic gap is increased, the number of magnetic force lines passing through a voice coil is increased, the magnetic field force borne by the voice coil is increased, the BL value is effectively improved, the sensitivity of the sounding device is improved, the flatness of a BL curve is effectively improved, the FR frequency response curve is obviously improved, the THD of harmonic distortion is effectively reduced, and the sound effect and performance of the whole voice coil are better improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention, 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 invention;

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

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

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

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

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

FIG. 7 is a schematic top view of a first magnetic assembly according to an embodiment of the present invention;

FIG. 8 is a schematic top view of an embodiment of a first magnetic assembly or a third magnetic assembly and a voice coil according to the present invention;

FIG. 9 is a schematic top view of another embodiment of the first magnetic assembly or the third magnetic assembly and the voice coil according to the present invention;

FIG. 10 is a schematic top view of an embodiment of a first magnetic assembly or a third magnetic assembly according to the present invention;

FIG. 11 is a schematic top view of another embodiment of the first magnetic assembly or the third magnetic assembly according to the present invention;

FIG. 12 is a graph comparing BL curves of the sound generating device provided by the invention and the prior art;

fig. 13 is a graph comparing FR curves of the sound generating apparatus provided by the present invention 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 yoke, 22, a central magnetic part, 221, a first magnetic group, 2211, a first magnet, 222, a second magnetic group, 2221, a second magnet, 223, a third magnetic group, 2231, a third magnet, 2232, a avoidance structure, 23, a side magnetic part, 231, a side magnet, 232, a side magnetic conduction 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, 321, a long side, 322, a short side, 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 invention 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 invention 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 invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

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 invention) 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 invention.

Based on the above concepts and problems, the present invention 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 11 in combination, in the embodiment of the invention, the sound generating device 100 includes a magnetic circuit system 2 and a vibration system 3, the magnetic circuit system 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 located outside the central magnetic portion 22 and spaced apart from the central magnetic portion 22 to form a magnetic gap 24, the central magnetic portion 22 includes a first magnetic group 221, a second magnetic group 222 and a third magnetic group 223 that are stacked, the first magnetic group 221 is connected to the magnetic yoke 21, the vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31, the voice coil 32 is disposed corresponding to the magnetic gap 24, wherein the first magnetic group 221 and the third magnetic group 223 are magnetized along a vibration direction perpendicular to the vibration direction of the vibration system 3, and the second magnetic group 222 is magnetized along the vibration direction of the vibration system 3, so that the central magnetic portion 22 forms a halbach magnetic circuit.

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 one end of the housing 1 away from the magnetic yoke 21, and is opposite to the magnetic circuit 2, and the center of the diaphragm 31 is spaced apart from the magnetic circuit 2, or connected to the central magnetic portion 22 of 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 one embodiment, as shown in fig. 2 to 5, the vibration system 3 further includes a centering support 34, one end of the centering support 34 is connected to the voice coil 32 and is connected to the lead wire of the voice coil 32, and the other end of the centering support 34 is connected to the housing 1.

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 first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic part 22 are stacked and arranged on the magnetic yoke 21, so that the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are magnetized along the vibration direction perpendicular to the vibration system 3, the second magnetic group 222 is magnetized along the vibration direction of the vibration system 3, that is, the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization direction of the first magnetic group 221 and the third magnetic group 223, so that the central magnetic part 22 forms a halbach magnetic circuit, a magnetic field with higher magnetic field strength is formed, the density of the magnetic flux of the magnetic gap 24 is increased, the number of magnetic lines passing through the voice coil 32 is increased, the magnetic field force received by the voice coil 32 is increased, the BL value is effectively increased, the sensitivity of the sounding device 100 is effectively improved, the flatness of the BL curve is effectively improved (as shown in fig. 12), the FR frequency response curve is obviously improved (as shown in fig. 13), and the harmonic distortion THD is effectively reduced, so that the sound effect and performance are better improved.

Fig. 12 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. 13 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 FR curve 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 FR curve is larger than 1000 Hz-10000 Hz.

Alternatively, the vibration direction of the vibration system 3 in the present embodiment may be selected to be a vertical direction. In the present embodiment, the center magnetic portion 22 is configured to be stacked on the first magnetic group 221, the second magnetic group 222, and the third magnetic group 223 of the magnetic yoke 21, that is, the first magnetic group 221, the second magnetic group 222, and the third magnetic group 223 are stacked on the magnetic yoke 21 in the vertical direction.

Alternatively, the first magnetic group 221 and the third magnetic group 223 of the center magnetic section 22 are magnetized in the horizontal direction. It can be appreciated that the magnetizing direction of the second magnetic group 222 is perpendicular to the magnetizing directions of the first magnetic group 221 and the third magnetic group 223, that is, the second magnetic group 222 is magnetized along the vertical direction. It should be noted that, in fig. 4, 5, and 7 to 11, the arrow direction in the magnetic circuit system 2 is the direction from the S pole to the N pole, i.e., the magnetizing direction.

It can be understood that the central magnetic portion 22 forms 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 increasing 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.

In the present embodiment, the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 are stacked along the moving direction of the voice coil 32, that is, the first magnetic group 221 is connected to the magnetic yoke 21, the second magnetic group 222 is stacked on the side of the first magnetic group 221 facing away from the magnetic yoke 21, and the third magnetic group 223 is stacked on the side of the second magnetic group 222 facing away from the first magnetic group 221.

Alternatively, the first magnetic group 221, the second magnetic group 222, and the third magnetic group 223 of the central magnetic portion 22 have a square plate-like structure, which is not limited herein.

In this embodiment, as shown in fig. 3 to 6, by magnetizing the first magnetic group 221 and the third magnetic group 223 of the central magnetic portion 22 in the horizontal direction, and magnetizing the second magnetic group 222 in the vertical direction, that is, the magnetizing direction of the second magnetic group 222 is perpendicular to the magnetizing directions of the first magnetic group 221 and the third magnetic group 223, the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 form a halbach magnetic array, 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 of force passing through the voice coil 32, increasing the magnetic field force applied to the voice coil 32, effectively improving the BL value, improving the sensitivity of the sounding device 100, and better improving the sound effect and performance of the whole machine.

It will be appreciated that the first magnetic group 221 and the third magnetic group 223 are both magnetized in a direction perpendicular to the vibration direction of the vibration system 3, that is, both magnetized in a direction perpendicular to the movement direction of the voice coil 32. Alternatively, the first magnetic group 221 and the third magnetic group 223 are magnetized in the horizontal direction. In this embodiment, the first magnetic group 221 and the third magnetic group 223 of the central magnetic portion 22 are magnetized along the horizontal direction, and the magnetizing direction of the second magnetic group 222 is perpendicular to the magnetizing direction of the first magnetic group 221 and the third magnetic group 223, that is, the second magnetic group 222 is magnetized along the vertical direction, so as to effectively superimpose and form a magnetic field with higher magnetic field strength.

In an embodiment, at least part of the projection of the third magnetic group 223 in the vibration direction perpendicular to the vibration system 3 coincides with the projection of the voice coil 32 in the vibration direction perpendicular to the vibration system 3. It can be appreciated that the arrangement is such that the magnetic induction lines of the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 are concentrated in the third magnetic group 223 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 sound quality of the audio output by the sound generating device 100. Alternatively, the projection of the voice coil 32 in the horizontal direction is located in the projection of the third magnetic group 223 in the horizontal direction.

In one embodiment, the edge of the third magnetic group 223 is provided with a avoidance structure 2232. In this embodiment, as shown in fig. 3 and 4, by arranging the avoidance structure 2232 at the edge of the third magnetic group 223, that is, arranging the structures such as a round angle, a chamfer angle or a step structure at the edge of the third magnetic group 223, the avoidance of the diaphragm 31 can be realized, meanwhile, the magnetic leakage is effectively prevented, and the BL value is improved.

Optionally, the relief structure 2232 is at least one of a sloped chamfer, a rounded corner, a chamfer, a stepped structure.

In an embodiment, the avoidance structures 2232 may be selected as sloped ramps. Optionally, the included angle formed by the avoidance structure 2232 and the surface of the third magnetic group 223 facing away from the second magnetic group 222 is greater than 90 ° and less than 180 °. In this embodiment, the range of the included angle formed by the inclined slope of the avoidance structure 2232 and the surface of the third magnetic group 223 facing away from the second magnetic group 222 is further selected to be 100 ° to 150 °, which is not limited herein. Alternatively, the included angles are 100 °, 110 °, 120 °, 130 °, 140 °, 150 °, etc., which are not limited herein.

It will be appreciated that the avoidance structure 2232 surrounds the periphery of the third magnetic group 223 on the side facing away from the second magnetic group 222, i.e., the avoidance structure 2232 is an integral annular inclined surface. Of course, in other embodiments, the avoidance structures 2232 include a plurality of avoidance structures 2232, and the plurality of avoidance structures 2232 are disposed at intervals and surround the periphery of the third magnetic group 223 on the side facing away from the second magnetic group 222, and at this time, two adjacent avoidance structures 2232 are not connected to each other and have a certain distance. Or the avoidance structures 2232 include a plurality of adjacent avoidance structures 2232 end to form a closed ring structure and encircle a periphery of the third magnetic group 223 on a side facing away from the second magnetic group 222. At this time, adjacent avoidance structures 2232 in the plurality of avoidance structures 2232 are adjacent and form a ring structure. Optionally, the included angles formed by the avoidance structures 2232 and the surface of the third magnetic group 223 facing away from the second magnetic group 222 may be the same, may be different, or may be at least partially the same, and is not limited herein.

Alternatively, the thickness of the first magnetic group 221 in the vibration direction of the vibration system 3 is smaller than or equal to the thickness of the second magnetic group 222 in the vibration direction of the vibration system 3. Alternatively, the thickness of the third magnetic group 223 in the vibration direction of the vibration system 3 is greater than or equal to the thickness of the second magnetic group 222 in the vibration direction of the vibration system 3. Alternatively, the thickness of the third magnetic group 223 in the vibration direction of the vibration system 3 is greater than or equal to the thickness of the first magnetic group 221 in the vibration direction of the vibration system 3. It will be appreciated that this ensures that the central magnetic portion 22 forms a halbach array of magnets, which can produce a relatively strong magnetic field.

In one embodiment, the magnetizing direction of the first magnetic group 221 is opposite to the magnetizing direction of the third magnetic group 223. In the present embodiment, as shown in fig. 4 and 5, the vibration direction of the vibration system 3 may be selected as a vertical direction, and the vibration direction perpendicular to the vibration system 3 may be selected as a horizontal direction. The first magnetic group 221 and the third magnetic group 223 are magnetized in the horizontal direction.

It will be appreciated that, when the magnetization direction of the first magnetic group 221 is from the center of the first magnetic group 221 to the center of the first magnetic group 221, the magnetization direction of the third magnetic group 223 may be from the center of the third magnetic group 223 to the center of the first magnetic group 24, that is, the S pole of the first magnetic group 221 is located at the center of the first magnetic group 221, the S pole of the third magnetic group 223 is located at the center of the first magnetic group 221, the N pole is located at the center of the magnetic group 24, or the magnetization direction of the first magnetic group 221 may be from the center of the first magnetic group 221 to the center of the third magnetic group 223, that is, the S pole of the first magnetic group 221 is located at the center of the first magnetic group 221, the S pole of the third magnetic group 223 is located at the center of the third magnetic group 223, and the N pole is located at the center of the third magnetic group 223, where the magnetization direction of the first magnetic group 221 is from the center of the first magnetic group 221 to the center of the magnetic group 24, and the magnetization direction of the third magnetic group 223 is not limited.

Alternatively, as shown in fig. 4, 5 and 7, the magnetizing direction of the first magnetic group 221 is along the circumference of the first magnetic group 221 toward the center direction of the first magnetic group 221, the magnetizing direction of the third magnetic group 223 is along the center of the third magnetic group 223 toward the circumference of the third magnetic group 223, or the magnetizing direction of the first magnetic group 221 is along the center of the first magnetic group 221 toward the circumference of the first magnetic group 221, and the magnetizing direction of the third magnetic group 223 is along the circumference of the third magnetic group 223 toward the center direction of the third magnetic group 223.

In an embodiment, the first magnetic group 221 and the third magnetic group 223 each have a first axis and a second axis perpendicular to the vibration direction of the vibration system 3, and the first axis and the second axis are perpendicular to each other, the magnetization direction of the first magnetic group 221 is along the first axis and/or the second axis, and the magnetization direction of the third magnetic group 223 is along the second axis and/or the first axis.

In the present embodiment, as shown in fig. 5, 7 to 9, and 11, the first magnetic group 221 and the third magnetic group 223 are magnetized in the horizontal direction. It will be appreciated that when the first magnetic group 221 is magnetized in the horizontal direction, the magnetizing direction of the first magnetic group 221 may be a direction from the magnetic gap 24 to the center of the first magnetic group 221, the magnetizing direction of the third magnetic group 223 may be a direction from the center of the third magnetic group 223 to the magnetic gap 24, that is, the S pole face of the first magnetic group 221 is located at the center of the first magnetic group 221, the N pole face is located at the center of the first magnetic group 221, the magnetizing direction of the first magnetic group 221 may be a direction from the center of the first magnetic group 221 to the center of the third magnetic group 223, that is, the S pole face of the first magnetic group 221 is located at the center of the first magnetic group 221, the N pole face is located at the center of the third magnetic gap 24, or the cross pole face 223 and the diagonal direction or the diagonal directions of the first magnetic group 223 may be defined.

Alternatively, as shown in fig. 4, the magnetic pole of the inner side of the first magnetic group 221 near the center thereof is the same as the magnetic pole of the side of the second magnetic group 222 far from the first magnetic group 221, and the magnetic pole of the inner side of the first magnetic group 221 near the center thereof is opposite to the magnetic pole of the inner side of the third magnetic group 223 near the center thereof.

In the present embodiment, when the magnetizing direction of the first magnetic group 221 is from the periphery of the first magnetic group 221 to the center of the first magnetic group 221, the magnetizing direction of the third magnetic group 223 is from the center of the third magnetic group 223 to the periphery of the third magnetic group 223, and the second magnetic group 222 is magnetized from bottom to top, that is, the second magnetic group 222 is magnetized upward in the vertical direction. When the magnetizing direction of the first magnetic group 221 is from the center of the first magnetic group 221 to the periphery of the first magnetic group 221, the magnetizing direction of the third magnetic group 223 is from the periphery of the third magnetic group 223 to the center of the third magnetic group 223, and the second magnetic group 222 is magnetized from top to bottom, that is, the second magnetic group 222 is magnetized downward along the vertical direction, which is not limited herein.

It should be noted that, the second magnetic group 222 is magnetized along the vibration direction of the vibration system 3, that is, the second magnetic group 222 is magnetized along the vertical direction, as shown in fig. 4, the second magnetic group 222 is magnetized from bottom to top, that is, the N pole of the second magnetic group 222 is at the top and the S pole is at the bottom, or the first magnetic group 221 is magnetized from top to bottom, that is, the N pole of the first magnetic group 221 is at the bottom and the S pole is at the top, which is not limited herein.

It can be appreciated that the magnetizing direction of the first magnetic group 221 is opposite to the magnetizing direction of the third magnetic group 223, and the second magnetic group 222 is magnetized along the vertical direction, so that the magnetic induction lines of the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 are concentrated in the third magnetic group 223, and the magnetic field with stronger magnetic field strength generated by the central magnetic portion 22 passes through the magnetic gap 24, 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 suffered by the voice coil 32, and effectively improving the BL value.

In an embodiment, the first magnetic set 221 includes a first magnet 2211 with a plate-like structure, and a first through hole is formed in the center of the first magnet 2211 with a plate-like structure.

In this embodiment, as shown in fig. 10, the first magnetic group 221 may be selected from a first magnet 2211, and the first magnet 2211 is disposed in a square or rectangular plate structure. It can be appreciated that, for convenience of magnetizing, the center of the first magnet 2211 is provided with a first through hole, and the first through hole is disposed through the first magnet 2211.

In an embodiment, the third magnetic group 223 includes a third magnet 2231 with a plate-like structure, and a second through hole is formed in the center of the third magnet 2231 with a plate-like structure.

In this embodiment, as shown in fig. 10, the third magnetic group 223 may be a third magnet 2231, and the third magnet 2231 is disposed in a square or rectangular plate structure. It will be appreciated that, for convenience of magnetizing, a second through hole is formed in the center of the third magnet 2231, and the second through hole is disposed through the third magnet 2231.

It is understood that, when the first magnetic group 221 is the first magnet 2211 with a monolithic plate structure, the third magnetic group 223 may be configured as the third magnet 2231 with a monolithic plate structure, and the shape and structure of the first magnet 2211 are similar to those of the third magnet 2231. Of course, in other embodiments, when the first magnetic group 221 is the first magnet 2211 with a monolithic plate structure, the third magnetic group 223 may also be provided with a plurality of third magnets 2231, and vice versa, which is not limited herein.

According to the sound production device 100, the magnetic circuit system 2 is arranged as 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, and the voice coil 32 of the vibration system 3 is arranged corresponding to the magnetic gap 24, so that current is introduced into the voice coil 32, and 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 central magnetic part 22 is set to be laminated to the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the magnetic yoke 21, so that the first magnetic group 221 and the third magnetic group 223 are magnetized along the vibration direction perpendicular to the vibration system 3 (namely along the horizontal direction), the second magnetic group 222 is magnetized along the vibration direction of the vibration system 3 (namely along the vertical direction), namely the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization directions of the first magnetic group 221 and the third magnetic group 223, so that the central magnetic part 22 forms a halbach magnetic circuit, and the halbach magnetic circuit formed by the central magnetic part 22 is utilized to effectively improve the magnetic field intensity, increase the density of magnetic flux of the magnetic gap 24, increase the number of magnetic lines passing through the voice coil 32, increase the magnetic field force received by the voice coil 32, effectively improve the BL value, improve the sensitivity of the sounding device 100, effectively improve the flatness of the curve, obviously improve the frequency response curve of the BL and effectively reduce the harmonic distortion THD, and better promote the sound effect and performance of the whole voice coil.

In one embodiment, the first magnetic group 221 includes a plurality of first magnets 2211, where the plurality of first magnets 2211 are disposed adjacent to each other and between the second magnetic group 222 and the magnetic yoke 21, and each of the plurality of first magnets 2211 is magnetized along a direction perpendicular to the vibration direction of the vibration system 3.

In the present embodiment, as shown in fig. 3, 6 to 9, and 11, the first magnetic group 221 is provided as a plurality of first magnets 2211, and the plurality of first magnets 2211 are laid flat between the magnetic yoke 21 and the second magnetic group 222. Alternatively, the plurality of first magnets 2211 are all magnetized in a horizontal direction, that is, the plurality of first magnets 2211 are all magnetized in a direction perpendicular to the moving direction of the voice coil 32, and the plurality of first magnets 2211 are all magnetized in a direction from the periphery to the center, or from the center to the periphery, which is not limited herein. Alternatively, the magnetic poles of the plurality of first magnets 2211 on the side close to the magnetic gap 24 are all the same.

It is understood that the first magnetic group 221 may be a first magnet 2211 with a square plate structure, which is disposed between the magnetic yoke 21 and the second magnetic group 222, or the first magnetic group 221 includes a plurality of first magnets 2211, and the plurality of first magnets 2211 are adjacently and parallelly arranged between the second magnetic group 222 and the magnetic yoke 21, so that the plurality of first magnets 2211 cooperate to form a square plate structure, which is not limited herein.

Alternatively, the plurality of first magnets 2211 of the first magnetic group 221 are magnetized along a horizontal direction, the magnetizing directions of the plurality of first magnets 2211 are perpendicular to the extending direction of the lengths of the respective first magnets 2211, and the polarities of the long sides of the plurality of first magnets 2211 facing the end portions of the magnetic gaps 24 are N poles or S poles, which is not limited herein.

In this embodiment, the voice coil 32 has a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 which are connected end to end. Optionally, the plurality of first magnets 2211 are disposed adjacent and parallel along the direction of the long side 321, or the plurality of first magnets 2211 are disposed adjacent and parallel along the direction of the short side 322, or a part of the first magnets 2211 are disposed adjacent and parallel along the direction of the long side 321, and another part of the first magnets 2211 are disposed at two ends of a part of the first magnets 2211 along the direction of the short side 322, or vice versa, without limitation herein.

In an embodiment, the voice coil 32 is rectangular and annular, the voice coil 32 has a long side 321 and a short side 322 connected end to end, the first magnetic group 221 includes two first magnets 2211, the two first magnets 2211 are adjacent and parallel along the direction of the long side 321, the two first magnets 2211 are magnetized along the direction of the long side 321, and the magnetizing directions of the two first magnets 2211 are opposite.

In the present embodiment, as shown in fig. 4 and 8, by providing the first magnetic group 221 as two first magnets 2211, the two first magnets 2211 are laid flat between the second magnetic group 222 and the magnetic yoke 21 along the direction of the long side 321. Alternatively, the two first magnets 2211 are magnetized in the horizontal direction, and the magnetizing directions of the two first magnets 2211 are opposite.

Alternatively, two first magnets 2211 are disposed adjacent and in parallel along the direction of the long side 321. The two first magnets 2211 are magnetized in the direction of the side where the two first magnets 2211 are abutted by the magnetic gap 24, or the two first magnets 2211 are magnetized in the direction of the magnetic gap 24 by the side where the two first magnets 2211 are abutted, not limited thereto. In the present embodiment, the two first magnets 2211 have the same magnetic poles facing the side of the magnetic gap 24.

It is understood that the first magnetic group 221 may be a first magnet 2211 with a square plate structure, and disposed between the second magnetic group 222 and the magnetic yoke 21, or the first magnetic group 221 includes a plurality of first magnets 2211, and the plurality of first magnets 2211 are disposed between the second magnetic group 222 and the magnetic yoke 21 in parallel and adjacent along the direction of the long side 321, so that the plurality of first magnets 2211 cooperate to form a square plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is rectangular and annular, the voice coil 32 has a long side 321 and a short side 322 that are connected end to end, the first magnetic group 221 includes two first magnets 2211, the two first magnets 2211 are adjacent and parallel along the direction of the short side 322, the two first magnets 2211 are magnetized along the direction of the short side 322, and the magnetizing directions of the two first magnets 2211 are opposite.

In the present embodiment, as shown in fig. 4 and 9, by providing the first magnetic group 221 as two first magnets 2211, the two first magnets 2211 are laid flat between the second magnetic group 222 and the magnetic yoke 21 in the direction of the short side 322. Alternatively, the two first magnets 2211 are magnetized in the horizontal direction, and the magnetizing directions of the two first magnets 2211 are opposite.

Alternatively, two first magnets 2211 are disposed adjacent and in parallel along the direction of the short side 322. The two first magnets 2211 are magnetized in the direction of the side where the two first magnets 2211 are abutted by the magnetic gap 24, or the two first magnets 2211 are magnetized in the direction of the magnetic gap 24 by the side where the two first magnets 2211 are abutted, not limited thereto. In the present embodiment, the two first magnets 2211 have the same magnetic poles facing the side of the magnetic gap 24.

It is understood that the first magnetic group 221 may be a first magnet 2211 with a square plate structure, and disposed between the second magnetic group 222 and the magnetic yoke 21, or the first magnetic group 221 includes a plurality of first magnets 2211, and the plurality of first magnets 2211 are disposed between the second magnetic group 222 and the magnetic yoke 21 in parallel and adjacent along the direction of the short side 322, so that the plurality of first magnets 2211 cooperate to form a square plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is rectangular and annular, the voice coil 32 has a long side 321 and a short side 322 that are connected end to end, the first magnetic group 221 includes four first magnets 2211, two first magnets 2211 are adjacent and arranged in parallel along the direction of the short side 322, two other first magnets 2211 are arranged at two ends of the two first magnets 2211 along the direction of the long side 321, the four first magnets 2211 are magnetized along the direction of the short side 322 and the direction of the long side 321, the magnetizing directions of the two first magnets 2211 arranged along the direction of the short side 322 are opposite, and the magnetizing directions of the two other first magnets 2211 arranged along the direction of the long side 321 are opposite.

In the present embodiment, the polarities of the end portions of the four first magnets 2211 facing the magnetic gap 24 are all N poles or all S poles. As shown in fig. 4, 6 and 7, four first magnets 2211 of the first magnetic group 221 are tiled between the second magnetic group 222 and the magnetic yoke 21, and two first magnets 2211 of the four first magnets 2211 are adjacent and arranged in parallel along the direction of the short side 322, and the other two first magnets 2211 of the four first magnets 2211 are arranged at two ends of the two first magnets 2211 along the direction of the long side 321.

Alternatively, the four first magnets 2211 are magnetized in the horizontal direction, the magnetizing directions of two first magnets 2211 of the four first magnets 2211 along the short side 322 are opposite, the magnetizing directions of the other two first magnets 2211 of the four first magnets 2211 along the long side 321 are opposite, the magnetizing directions of the four first magnets 2211 are perpendicular to the respective length extending directions, and the polarities of the ends of the four first magnets 2211 facing the magnetic gap 24 are both N poles or both S poles, which is not limited herein.

In the present embodiment, the first magnets 2211 of the first magnetic group 221 may have a square strip or plate structure, or the first magnets 2211 each include a plurality of first magnets 2211 arranged between the second magnetic group 222 and the magnetic yoke 21 in parallel and adjacent to each other along the long side 321 and the short side 322, so that the plurality of first magnets 2211 cooperate to form a square strip or plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is in a rectangular ring shape, the voice coil 32 has a long side 321 and a short side 322 which are connected end to end, the first magnet group 221 is divided along two diagonal lines to form four first magnets 2211, two first magnets 2211 are arranged in parallel along the direction of the short side 322, the other two first magnets 2211 are arranged in parallel along the direction of the long side 321, the four first magnets 2211 are magnetized along the direction of the short side 322 and the direction of the long side 321 respectively, the magnetizing directions of the two first magnets 2211 arranged along the direction of the short side 322 are opposite, and the magnetizing directions of the other two first magnets 2211 arranged along the direction of the long side 321 are opposite.

In this embodiment, as shown in fig. 11, the upper and lower surfaces of the first magnetic group 221 are substantially rectangular, the first magnetic group 221 is divided along two diagonal lines to form four first magnets 2211, and the four first magnets 2211 may be formed by dividing one first magnetic group 221, or may be formed by splitting a split structure to form the first magnetic group 221. Alternatively, two first magnets 2211 are arranged in parallel along the direction of the short side 322, the other two first magnets 2211 are arranged in parallel along the direction of the long side 321, the four first magnets 2211 are magnetized along the direction of the short side 322 and the direction of the long side 321 respectively, the magnetizing directions of the two first magnets 2211 are opposite, and the magnetizing directions of the other two first magnets 2211 are opposite.

Alternatively, the polarities of the end portions of the four first magnets 2211 facing the magnetic gap 24 are all N poles or all S poles. Four first magnets 2211 of the first magnetic group 221 are horizontally laid and positioned between the second magnetic group 222 and the magnetic yoke 21. Alternatively, two first magnets 2211 of the four first magnets 2211 are symmetrically disposed at the intersection point of the two diagonals of the first magnetic group 221, and the other two first magnets 2211 are symmetrically disposed at the intersection point of the two diagonals of the first magnetic group 221.

It is understood that the four first magnets 2211 are all arranged in a triangle shape, such that the top angles of the four first magnets 2211 coincide with the intersection points of two diagonal lines of the first magnetic group 221.

Alternatively, the four first magnets 2211 are magnetized in the horizontal direction, the magnetizing directions of two first magnets 2211 are opposite, the magnetizing directions of the other two first magnets 2211 are opposite, the magnetizing directions of the four first magnets 2211 are perpendicular to the direction of the bottom edge opposite to the intersection point of the two diagonal lines of the first magnetic group 221, and the polarities of the ends of the four first magnets 2211 facing the magnetic gap 24 are both N poles or both S poles, which is not limited herein.

In one embodiment, the second magnetic group 222 includes a second magnet 2221 of unitary plate-like structure. It can be appreciated that, with such arrangement, the processing of the second magnet 2221 is facilitated, the assembly and magnetization are also facilitated, and the production and assembly efficiency is effectively improved.

In an embodiment, the second magnetic group 222 includes a plurality of second magnets 2221, where the plurality of second magnets 2221 are disposed adjacent to each other and located between the first magnetic group 221 and the third magnetic group 223, and the plurality of second magnets 2221 are magnetized along the vibration direction of the vibration system 3, and the magnetizing directions of the plurality of second magnets 2221 are the same.

In the present embodiment, as shown in fig. 4 and 6, by providing the second magnetic group 222 as a plurality of second magnets 2221, the plurality of second magnets 2221 are laid flat between the first magnetic group 221 and the third magnetic group 223. Alternatively, the plurality of second magnets 2221 are magnetized in the vertical direction, and the magnetizing directions of the plurality of second magnets 2221 are the same. That is, the plurality of second magnets 2221 are all magnetized in the direction in which the voice coil 32 moves, and the plurality of second magnets 2221 are simultaneously magnetized upward or downward, which is not limited herein. Alternatively, the magnetic poles of the plurality of second magnets 2221 on the side close to the first magnetic group 221 are all the same.

It is understood that the second magnetic group 222 may be a second magnet 2221 with a square plate structure, which is disposed between the first magnetic group 221 and the third magnetic group 223, or the second magnetic group 222 includes a plurality of second magnets 2221, where the plurality of second magnets 2221 are adjacent and arranged in parallel between the first magnetic group 221 and the third magnetic group 223, so that the plurality of second magnets 2221 cooperate to form a square plate structure, which is not limited herein.

In this embodiment, the voice coil 32 has a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 which are connected end to end. Optionally, the plurality of second magnets 2221 are disposed adjacent and parallel along the direction of the long side 321, or the plurality of second magnets 2221 are disposed adjacent and parallel along the direction of the short side 322, or a part of the second magnets 2221 are disposed adjacent and parallel along the direction of the long side 321, and another part of the second magnets 2221 are disposed at two ends of a part of the second magnets 2221 along the direction of the short side 322, or vice versa, without limitation herein.

In an embodiment, the third magnetic group 223 includes a plurality of third magnets 2231, and the plurality of third magnets 2231 are disposed adjacent to each other and on a side of the second magnetic group 222 facing away from the first magnetic group 221, wherein the plurality of third magnets 2231 are magnetized along a direction perpendicular to the vibration direction of the vibration system 3.

In the present embodiment, as shown in fig. 4,5, 6,8 to 9, and 11, the third magnet sets 223 are provided as a plurality of third magnets 2231, and the plurality of third magnets 2231 are tiled on the side of the second magnet set 222 facing away from the first magnet set 221. Alternatively, the plurality of third magnets 2231 are all magnetized in the horizontal direction, that is, the plurality of third magnets 2231 are all magnetized in the direction perpendicular to the movement direction of the voice coil 32, and the plurality of third magnets 2231 are all magnetized in the circumferential direction or in the circumferential direction, without limitation. Alternatively, the magnetic poles of the plurality of third magnets 2231 on the side near the magnetic gap 24 are all the same.

It is understood that the third magnetic set 223 may be a third magnet 2231 with a square plate structure, which is disposed on a side of the second magnetic set 222 facing away from the first magnetic set 221, or the third magnetic set 223 includes a plurality of third magnets 2231, wherein the plurality of third magnets 2231 are adjacent and arranged in parallel on a side of the second magnetic set 222 facing away from the first magnetic set 221, such that the plurality of third magnets 2231 cooperate to form a square plate structure, which is not limited herein.

Alternatively, the plurality of third magnets 2231 of the third magnetic group 223 are magnetized along the horizontal direction, the magnetizing directions of the plurality of third magnets 2231 are perpendicular to the length extending direction of each third magnet 2231, and the polarities of the long sides of the plurality of third magnets 2231 facing the end of the magnetic gap 24 are N poles or S poles, which is not limited herein.

In this embodiment, the voice coil 32 has a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 which are connected end to end. Optionally, a plurality of third magnets 2231 are disposed adjacent and parallel along the direction of the long side 321, or a plurality of third magnets 2231 are disposed adjacent and parallel along the direction of the short side 322, or a part of the third magnets 2231 are disposed adjacent and parallel along the direction of the long side 321, and another part of the third magnets 2231 are disposed at both ends of a part of the third magnets 2231 along the direction of the short side 322, or vice versa, without limitation herein.

In an embodiment, the voice coil 32 is rectangular and ring-shaped, the voice coil 32 has a long side 321 and a short side 322 connected end to end, the third magnetic set 223 includes two third magnets 2231, the two third magnets 2231 are adjacent and parallel along the direction of the long side 321, the two third magnets 2231 are magnetized along the direction of the long side 321, and the magnetizing directions of the two third magnets 2231 are opposite.

In the present embodiment, as shown in fig. 4 and 8, by arranging the third magnetic group 223 as two third magnets 2231, the two third magnets 2231 are tiled on the side of the second magnetic group 222 facing away from the first magnetic group 221 along the direction of the long side 321. Alternatively, both the third magnets 2231 are magnetized in the horizontal direction, and the magnetizing directions of the two third magnets 2231 are opposite.

Optionally, two third magnets 2231 are disposed adjacent and in parallel along the direction of the long side 321. The two third magnets 2231 are magnetized in the direction of the side edge where the two third magnets 2231 are abutted by the magnetic gap 24, or the two third magnets 2231 are magnetized in the direction of the magnetic gap 24 by the side edge where the two third magnets 2231 are abutted, which is not limited herein. In the present embodiment, the magnetic poles of the two third magnets 2231 facing the side of the magnetic gap 24 are the same.

It is understood that the third magnetic assembly 223 may be a third magnet 2231 with a square plate structure and disposed on a side of the second magnetic assembly 222 facing away from the first magnetic assembly 221, or the third magnetic assembly 223 includes a plurality of third magnets 2231, and the plurality of third magnets 2231 are disposed adjacent to each other along the direction of the long side 321 and in parallel on a side of the second magnetic assembly 222 facing away from the first magnetic assembly 221, such that the plurality of third magnets 2231 cooperate to form a square plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is rectangular and annular, the voice coil 32 has a long side 321 and a short side 322 connected end to end, the third magnetic group 223 includes two third magnets 2231, the two third magnets 2231 are adjacent and parallel along the direction of the short side 322, the two third magnets 2231 are magnetized along the direction of the short side 322, and the magnetizing directions of the two third magnets 2231 are opposite.

In the present embodiment, as shown in fig. 4 and 9, by arranging the third magnetic group 223 as two third magnets 2231, the two third magnets 2231 are tiled on the side of the second magnetic group 222 facing away from the first magnetic group 221 along the direction of the short side 322. Alternatively, both the third magnets 2231 are magnetized in the horizontal direction, and the magnetizing directions of the two third magnets 2231 are opposite.

Optionally, two third magnets 2231 are disposed adjacent and in parallel along the direction of the short side 322. The two third magnets 2231 are magnetized in the direction of the side edge where the two third magnets 2231 are abutted by the magnetic gap 24, or the two third magnets 2231 are magnetized in the direction of the magnetic gap 24 by the side edge where the two third magnets 2231 are abutted, which is not limited herein. In the present embodiment, the magnetic poles of the two third magnets 2231 facing the side of the magnetic gap 24 are the same.

It is understood that the third magnetic assembly 223 may be a third magnet 2231 with a square plate structure and disposed on a side of the second magnetic assembly 222 facing away from the first magnetic assembly 221, or the third magnetic assembly 223 includes a plurality of third magnets 2231, and the plurality of third magnets 2231 are disposed adjacent to each other along the direction of the short side 322 and parallel to a side of the second magnetic assembly 222 facing away from the first magnetic assembly 221, such that the plurality of third magnets 2231 cooperate to form a square plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is rectangular and ring-shaped, the voice coil 32 has a long side 321 and a short side 322 that are connected end to end, the third magnetic group 223 includes four third magnets 2231, two third magnets 2231 are adjacent and arranged in parallel along the direction of the short side 322, two other third magnets 2231 are arranged at two ends of the two third magnets 2231 along the direction of the long side 321, the four third magnets 2231 are magnetized along the direction of the short side 322 and the direction of the long side 321, the magnetizing directions of the two third magnets 2231 arranged along the direction of the short side 322 are opposite, and the magnetizing directions of the two other third magnets 2231 arranged along the direction of the long side 321 are opposite.

In the present embodiment, the polarities of the ends of the four third magnets 2231 facing the magnetic gap 24 are all N poles or all S poles. As shown in fig. 4, 5 and 6, four third magnets 2231 of the third magnetic group 223 are tiled on a side of the second magnetic group 222 facing away from the first magnetic group 221, and two third magnets 2231 of the four third magnets 2231 are adjacent and parallel along the direction of the short side 322, and the other two third magnets 2231 of the four third magnets 2231 are arranged at two ends of the two third magnets 2231 along the direction of the long side 321.

Alternatively, the four third magnets 2231 are magnetized in the horizontal direction, the magnetizing directions of two third magnets 2231 in the four third magnets 2231 are opposite, the magnetizing directions of other two third magnets 2231 in the four third magnets 2231 are opposite, the magnetizing directions of the four third magnets 2231 are perpendicular to the respective length extending directions, and the polarities of the ends of the four third magnets 2231 facing the magnetic gap 24 are both N poles or S poles, which is not limited herein.

In the present embodiment, the third magnets 2231 of the third magnetic set 223 may be an integral square strip or plate structure, or the third magnets 2231 each include a plurality of third magnets 2231 arranged adjacent to each other along the long side 321 and the short side 322 and in parallel on the side of the second magnetic set 222 facing away from the first magnetic set 221, so that the plurality of third magnets 2231 cooperate to form a square strip or plate structure, which is not limited herein.

In an embodiment, the voice coil 32 is in a rectangular ring shape, the voice coil 32 has a long side 321 and a short side 322 connected end to end, the third magnet group 223 is divided along two diagonal lines to form four third magnets 2231, two third magnets 2231 are arranged in parallel along the direction of the short side 322, the other two third magnets 2231 are arranged in parallel along the direction of the long side 321, the four third magnets 2231 are magnetized along the direction of the short side 322 and the direction of the long side 321 respectively, the magnetizing directions of the two third magnets 2231 arranged along the direction of the short side 322 are opposite, and the magnetizing directions of the other two third magnets 2231 arranged along the direction of the long side 321 are opposite.

In this embodiment, as shown in fig. 11, the upper and lower surfaces of the third magnetic group 223 are substantially rectangular, the third magnetic group 223 is divided along two diagonal lines to form four third magnets 2231, and the four third magnets 2231 may be formed by dividing one third magnetic group 223, or may be formed by splitting a split structure to form the third magnetic group 223. Alternatively, two third magnets 2231 are disposed in parallel along the direction of the short side 322, two other third magnets 2231 are disposed in parallel along the direction of the long side 321, four third magnets 2231 are magnetized along the direction of the short side 322 and the direction of the long side 321, two third magnets 2231 are magnetized in opposite directions, and two other third magnets 2231 are magnetized in opposite directions.

Optionally, the polarities of the ends of the four third magnets 2231 facing the magnetic gap 24 are all N poles or all S poles. Four third magnets 2231 of the third magnetic group 223 are horizontally disposed on a side of the second magnetic group 222 facing away from the first magnetic group 221. Alternatively, two third magnets 2231 of the four third magnets 2231 are symmetrically disposed at the intersection point of the two diagonals of the third magnetic group 223, and the other two third magnets 2231 are symmetrically disposed at the intersection point of the two diagonals of the third magnetic group 223.

It will be appreciated that the four third magnets 2231 are all arranged in a triangle shape such that the top corners of the four third magnets 2231 coincide with the intersections of the two diagonal lines of the third magnetic group 223.

Alternatively, the four third magnets 2231 are magnetized in the horizontal direction, the magnetizing directions of two third magnets 2231 are opposite, the magnetizing directions of the other two third magnets 2231 are opposite, and the magnetizing directions of the four third magnets 2231 are perpendicular to the direction of the bottom edge opposite to the intersection point of the two diagonal lines of the third magnetic group 223, and the polarities of the ends of the four third magnets 2231 facing the magnetic gap 24 are both N-poles or both S-poles, 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, and the second magnet group 222 and the side magnet 231 are magnetized in the vibration direction of the vibration system 3, and the magnetization direction of the second magnet group 222 is opposite to the magnetization direction of the side magnet 231 of the side magnet 23.

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. Alternatively, the magnetic pole of the side magnet 231 near the side magnetic conduction plate 232 is opposite to the magnetic pole of the second magnetic group 222 near the third magnetic group 223.

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 and the side magnetic conductive plates 232 are arranged in a one-to-one correspondence manner, adjacent side magnets 231 are spaced to form an annular structure with gaps, adjacent side magnetic conductive plates 232 are spaced to form an annular structure with gaps, or the side magnets 231 form a closed integral annular structure, the side magnetic conductive plates 232 are arranged in a plurality, the adjacent side magnetic conductive plates 232 are connected end to form a closed annular structure and are arranged corresponding to the annular side magnets 231, or the side magnetic conductive plates 232 form a closed integral annular structure, the side magnets 231 are arranged in a plurality, and the adjacent side magnets 231 are connected end to form a closed annular structure and are arranged corresponding to the annular side magnetic conductive plates 232, and the arrangement is not limited.

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 second magnetic group 222 of the center magnet portion 22 are both magnetized in the vertical direction, that is, both magnetized in the moving direction of the voice coil 32. Alternatively, the magnetizing direction of the second magnetic group 222 is opposite to the magnetizing direction of the side magnet 231 of the side magnetic part 23.

It can be understood that when the second magnetic group 222 is magnetized from bottom to top, the side magnet 231 is magnetized from top to bottom, that is, when the N pole and S pole of the second magnetic group 222 are on top and the N pole and S pole of the side magnet 231 are on top, or when the second magnetic group 222 is magnetized from top to bottom, the side magnet 231 is magnetized from bottom to top, that is, when the N pole and S pole of the second magnetic group 222 are on top and the N pole and S pole of the side magnet 231 are on top and the S pole are on top, respectively.

In an embodiment, the sound generating apparatus 100 further includes a housing 1, 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.

In the present embodiment, the side magnetic portion 23 includes 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. Alternatively, the side magnetic plate 232 is integrally formed with the housing 1.

It can be appreciated that when the housing 1 is a plastic part, the side magnetic plate 232 is integrally injection molded with the housing 1. When the housing 1 is a metal member, the side magnetic plate 232 and the housing 1 are formed by punching, blanking or riveting, and are 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 collar 313 disposed around the inner ring portion 311, a flat portion 314 disposed around the first collar 313, a second collar 315 disposed around the flat portion 314, and a fixing portion 316 connected to the outer side of the second collar 315, wherein 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 it is ensured that the central portion of the diaphragm 31 is lap-supported on the stepped surface of the vibration plate, the upper surface of the central portion of the diaphragm 31 is flush with the upper surface of the vibration plate, so that the assembly structure is 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. 3 and 4, 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.

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 support pieces 34 are correspondingly distributed along the long axis direction of the magnetic circuit system 2, and/or the plurality of centering support pieces 34 are correspondingly distributed along the short axis direction of the magnetic circuit system 2, and/or the plurality of centering support pieces 34 are correspondingly distributed along the diagonal or four corners 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 invention is not particularly limited herein with respect to the arrangement of centering tabs 34.

In one embodiment, each positioning 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, 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.

It will be appreciated that, in order to facilitate the wire routing connection of the voice coil 32 and to facilitate connection and conduction with an external circuit, the inner fixing portion 342 is provided with an inner bonding pad, and the wire of the voice coil 32 extends to the inner bonding pad along the connection portion 332.

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 collar 313 disposed around the inner ring portion 311, a straight portion 314 disposed around the first collar 313, a second collar 315 disposed around the straight portion 314, and a fixing portion 316 connected to an outer side of the second collar 315, the fixing portion 316 is connected to the housing 1, the straight portion 314 is directly or indirectly connected to the voice coil 32, the inner ring portion 311 is connected to the third magnetic group 223, wherein the inner ring portion 311 has a flat plate shape and is attached to the third magnetic group 223, or the inner ring portion 311 is formed with an 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.

It should be noted that, the diaphragm 31 and the voice coil 32 may be directly connected, for example, one end of the voice coil 32 is connected to the straight portion 314 of the diaphragm 31, and the other end of the voice coil 32 is suspended from the magnetic gap 24. Of course, the diaphragm 31 and the voice coil 32 may be indirectly connected, for example, the diaphragm 31 is connected to the voice coil 32 through the frame 33, that is, the flat portion 314 of the diaphragm 31 is connected to the main body portion 331 of the frame 33, one side of the main body portion 331 facing away from the flat portion 314 is connected to one end of the voice coil 32, and the other end of the voice coil 32 is suspended in the magnetic gap 24, which is not limited herein.

In this embodiment, the inner ring portion 311 of the diaphragm 31 may be a sealing structure, that is, the inner ring portion 311 is flat, and the inner ring portion 311 is connected to the side of the third magnetic group 223 facing away from the second magnetic group 222. Of course, the diaphragm 31 may be disposed in a ring shape, and at this time, an inner ring hole 312 is formed in the center of the inner ring portion 311, and the inner ring portion 311 is connected to the edge of the third magnetic group 223, so that a portion of the third magnetic group 223 is disposed corresponding to the inner ring hole 312.

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 on the straight portion 314. 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. Optionally, a reinforcement 318 is provided between the straight portion 314 and the backbone 33.

In an embodiment, as shown in fig. 2 to 4, 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.

In an embodiment, at least a portion of a side of the third magnetic group 223 facing away from the second magnetic group 222 protrudes toward a side facing away from the second magnetic group 222 to form a protrusion.

In this embodiment, as shown in fig. 3, 4 and 6, the third magnetic group 223 includes a central portion and a rim portion, the rim portion surrounds the outer periphery of the central portion, and one side of the central portion facing away from the second magnetic group 222 protrudes from one side of the rim portion facing away from the second magnetic group 222 and forms a protruding portion. Alternatively, the center portion and the rim portion of the third magnetic group 223 are an integrally formed structure. Of course, in other embodiments, the center portion and the edge portion of the third magnetic group 223 may be configured as a separate structure, which is not limited herein.

Alternatively, the thickness of the center portion in the moving direction of the voice coil 32 is optionally larger than the thickness of the edge portion in the moving direction of the voice coil 32. That is, the side surface of the central portion facing away from the second magnetic group 222 protrudes the side surface of the edge portion facing away from the second magnetic group 222 to form a protruding portion.

It can be understood that the vibration system 3 is provided with a through structure through which the protruding portion 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 protruding portion of the central magnetic portion 22 in the sound generating apparatus 100 may be abutted to the inner wall of the housing of the electronic device, and the front cavity structure may be formed by using the height difference between the protruding portion of the central magnetic portion 22 and the vibration system 3 without additional increase of the front cavity space, which is not limited herein.

Of course, in other implementations, the thickness of the center portion in the direction of movement of the voice coil 32 may alternatively be the same as the thickness of the edge portion in 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 this embodiment, the protruding portion of the third magnetic group 223 is protruding from the inner ring hole 312, that is, the inner ring portion 311 of the diaphragm 31 is connected to the edge portion of the third magnetic group 223.

In an embodiment, the third magnetic group 223 includes a central portion and a rim portion, the rim portion surrounds the periphery of the central portion, and the side of the central portion facing away from the second magnetic group 222 protrudes from the side of the second magnetic group 222 to form a protruding portion, the rim portion forms a closed integral annular structure, or the rim portion includes a plurality of adjacent rim portions that are connected end to form a closed annular structure, or the rim portion includes a plurality of adjacent rim portions that are spaced apart to form an annular structure with a gap, or the rim portion and the central portion are integrally formed.

In the present embodiment, as shown in fig. 3 and 6, the rim portion of the third magnetic group 223 includes a plurality of rim portions surrounding the outer periphery of the center portion. Alternatively, adjacent rims are end to form a closed loop structure, or adjacent rims are spaced apart to form a loop structure with gaps. Of course, the rim portion may be formed as a closed integral annular structure provided on the outer periphery of the central portion, and is not limited thereto.

It will be appreciated that the rim portion and the center portion of the third magnetic stack 223 may alternatively be integrally formed for ease of processing and organization.

The invention 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 invention, and is not intended to limit the scope of the invention, 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 invention.

Claims

1. A sound emitting device, the sound emitting device comprising:

The first magnetic group and the third magnetic group are magnetized along the vibration direction perpendicular to the vibration system, the second magnetic group is magnetized along the vibration direction of the vibration system, so that the center magnetic part forms a halbach magnetic circuit, the magnetization direction of the first magnetic group is opposite to that of the third magnetic group, the magnetic pole of the inner side of the first magnetic group close to the center of the first magnetic group is the same as the magnetic pole of the second magnetic group far away from one side of the first magnetic group, and the magnetic pole of the inner side of the first magnetic group close to the center of the first magnetic group is opposite to the magnetic pole of the inner side of the third magnetic group close to the center of the third magnetic group.

2. The sound generating apparatus according to claim 1, wherein an avoidance structure is provided at an edge of the third magnetic group, and the avoidance structure is at least one of an inclined slope, a rounded corner, a chamfer, and a step structure;

3. The sound emitting apparatus of claim 1, wherein a projection of at least a portion of the third magnetic group 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.

4. The sound generating apparatus of claim 1, wherein the magnetization direction of the first magnetic group is along the periphery of the first magnetic group toward the center of the first magnetic group, and the magnetization direction of the third magnetic group is along the center of the third magnetic group toward the periphery of the third magnetic group;

Or, the first magnetic group and the third magnetic group each have a first axis and a second axis perpendicular to the vibration direction of the vibration system, the first axis and the second axis are perpendicular to each other, the magnetization direction of the first magnetic group is along the first axis and/or the second axis, and the magnetization direction of the third magnetic group is along the second axis and/or the first axis.

5. The sound generating apparatus of claim 4, wherein the first magnetic group comprises a first magnet of an integral plate-like structure, and a first through hole is formed in the center of the first magnet of the plate-like structure;

6. The sound generating apparatus of claim 1, wherein the voice coil is in the shape of a rectangular ring having long and short sides connected end to end;

7. The sound generating apparatus of claim 1, wherein the second magnetic group comprises a second magnet of unitary plate-like construction;

8. The sound generating apparatus of claim 1, wherein the voice coil is in the shape of a rectangular ring having long and short sides connected end to end;

9. The sound generating apparatus according to any one of claims 1 to 8, wherein the side magnetic portion includes a side magnet and a side magnetically permeable plate that are stacked, the side magnet being connected to the magnetically permeable yoke;

10. The sound generating apparatus of claim 9, further comprising a housing, one end of the housing being connected to the side magnetic plate, the other end of the housing being connected to the periphery of the diaphragm.

11. The sound generating apparatus of claim 10, wherein the side magnetically permeable plate is integrally formed with the housing;

12. The sound generating apparatus of claim 10, wherein the vibration system further comprises a frame, the voice coil being coupled to the diaphragm through the frame.

13. The sound generating apparatus of claim 12, wherein the frame comprises a main body portion and a connection portion connected to a periphery of the main body portion, the main body portion being disposed between the diaphragm and the voice coil;

14. The sound generating apparatus of claim 10, wherein the diaphragm comprises an inner ring portion, a first collar disposed around the inner ring portion, a straight portion disposed around the first collar, a second collar disposed around the straight portion, and a fixing portion connected to an outer side of the second collar, the fixing portion being connected to the housing, the straight portion being directly or indirectly connected to the voice coil, the inner ring portion being connected to the third magnetic group;

15. The sound generating apparatus of claim 14, wherein the inner ring portion, the first ring, the straight portion, the second ring, and the fixing portion are integrally formed;

16. An electronic device comprising the sound emitting apparatus according to any one of claims 1 to 15.