CN119946523A

CN119946523A - Sound generating device and sound generating module

Info

Publication number: CN119946523A
Application number: CN202510005288.XA
Authority: CN
Inventors: 蔡晓东; 张琳琳
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2025-01-02
Filing date: 2025-01-02
Publication date: 2025-05-06

Abstract

The invention discloses a sound generating device and a sound generating module, which relate to the technical field of electroacoustic transduction, wherein a central magnetic part of a magnetic circuit system of the sound generating device comprises a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a laminated way, the magnetizing directions of the first central magnet and the second central magnet are opposite, an avoidance space is formed between two adjacent side magnetic parts, the inner side of an inner folded ring of a first vibrating diaphragm assembly of a vibrating system is connected with the central magnetic part, the diaphragm and the second diaphragm assembly are sequentially arranged on one side of the first diaphragm assembly facing the magnetic yoke, an acoustic cavity communicated with an acoustic outlet of the shell is formed between the diaphragm and the second diaphragm assembly, a first extension part of the second diaphragm assembly is correspondingly connected with a second extension part of the diaphragm and extends to an avoidance space, the rigid connecting piece is arranged in the avoidance space, the rigid connecting part of the rigid connecting piece is connected with the first extension part, and a fourth extension part is connected with the voice coil. The sound generating device increases the effective vibration area of the vibration system and improves the acoustic performance.

Description

Sound production device and sound production module

Technical Field

The invention relates to the technical field of electroacoustic transduction, in particular to a sound generating device and a sound generating module using the same.

Background

In recent years, with the rapid development of consumer electronic products, demands for electronic products, such as portability, comfort, and the like, are continuously increasing. Sound emitting devices are important electroacoustic transducer components in consumer electronics, which find wide application as speakers, headphones, earphones, and the like. As the performance of electronic products improves, improvements in acoustic performance of sound emitting devices are also a necessary trend.

The sound generating device drives the vibrating diaphragm in the vibration system to vibrate through the magnetic circuit system, the air is repeatedly pushed to realize sound production, and the vibrating diaphragm is used as a core component of the sound generating device to directly influence the acoustic performance of the sound generating device. The effective vibration area (Sd) of the vibrating diaphragm is one of the important factors affecting the acoustic performance of the sound generating device, and the larger the effective vibration area of the vibrating diaphragm is, the better the acoustic performance of the sound generating device is. However, the effective vibration area of the diaphragm of the sound generating apparatus in the related art is small, resulting in an influence on the acoustic performance of the sound generating apparatus.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and a sound generating module, and aims to provide a sound generating device with increased effective vibration area, wherein the sound generating device has increased effective vibration area under the same amplitude condition compared with a conventional loudspeaker, the performance of the sound generating device is improved, and the product size is thinned under the same performance condition.

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

The shell is provided with a sound outlet;

the magnetic circuit system is connected to the shell and comprises a magnetic yoke, a central magnetic part and side magnetic parts, wherein the central magnetic part and the side magnetic parts are arranged on the magnetic yoke, the side magnetic parts are arranged on the outer side of the central magnetic part and form a magnetic gap with the central magnetic part, the central magnetic part comprises a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a stacked mode, the first central magnet is connected with the magnetic yoke, the side magnetic parts comprise a plurality of adjacent side magnetic parts, a avoidance space is formed between the two side magnetic parts, and

The vibration system comprises a first vibration film component, a second vibration film component, a voice coil, a diaphragm and a rigid connecting piece, wherein the first vibration film component comprises an inner folding ring, a first vibration plate and an outer folding ring which are sequentially connected, the inner side of the inner folding ring is connected with a second center magnet, the outer periphery of the outer folding ring is connected with the shell, one end of the voice coil is connected with the first vibration film component, the other end of the voice coil is suspended in the magnetic gap, the diaphragm and the second vibration film component are sequentially arranged on one side of the first vibration film component, which faces to the magnetic yoke, and are positioned on the outer side of the voice coil, the outer edges of the diaphragm and the second vibration film component are connected with the shell, the inner edge of the diaphragm is connected with the inner edge of the second vibration film component so as to form a sounding cavity communicated with the sound outlet hole between the diaphragm and the second vibration film component, the second vibration film component is provided with a first extension part extending to the space, the diaphragm is provided with a second extension part extending to the avoidance space, and the second extension part is correspondingly connected with the first extension part;

the first center magnet and the second center magnet are magnetized along the vibration direction of the vibration system and are opposite in magnetizing direction, the rigid connecting piece is arranged in the avoidance space and comprises a rigid connecting portion and a fourth extending portion, the fourth extending portion extends towards the voice coil from the rigid connecting portion, the rigid connecting portion is connected with the first extending portion, and the fourth extending portion is connected with the voice coil.

In an embodiment, the second diaphragm assembly includes a ring-folded portion and a second diaphragm, the outer periphery of the ring-folded portion is connected with the housing, the second diaphragm includes a main body portion connected with the inner edge of the ring-folded portion, and a first bending portion formed by bending and extending the main body portion towards the diaphragm, and the first bending portion is connected with the inner edge of the diaphragm;

One side of the main body part far away from the folded ring part extends towards the inside of the avoidance space to form the first extension part.

In an embodiment, an inclined part is formed at the connection part of the main body part and the first bending part, and the inclined part is arranged at an included angle with the vibration direction of the vibration system;

and/or the outer periphery of the folded ring part is folded to form a first flanging, and the first flanging is connected with the outer wall of the shell.

In an embodiment, the diaphragm is a flexible member, and the diaphragm includes an outer connecting portion, a deformation portion and an inner connecting portion which are sequentially connected, wherein an outer periphery of the outer connecting portion is connected with the housing, an inner edge of the inner connecting portion is connected with the first bending portion, and the deformation portion is in a bending shape;

the inner connecting part extends towards the avoidance space to form the second extending part corresponding to the first extending part.

In an embodiment, the inner edge of the inner connecting portion is bent towards the first bending portion to form a second flanging, and the second flanging is connected with the first bending portion;

And/or, along the vibration direction of the vibration system, the projection width L1 of the deformation part is greater than or equal to the projection width L2 of the folded ring part, and the ratio of L1 to L2 is 1:1-3:1;

And/or the deformation part protrudes towards the direction away from the first vibrating diaphragm assembly, the folded ring part protrudes towards the direction close to the first vibrating diaphragm assembly, and the deformation part and the folded ring part are arranged in a dislocation manner in the direction perpendicular to the vibrating system;

and/or, the inner folding ring and the outer folding ring are both raised towards the direction away from the magnetic circuit system;

and/or the compliance of the diaphragm is greater than the compliance of the folded ring portion.

In an embodiment, an effective vibration area Sd1 of the diaphragm is smaller than an effective vibration area Sd2 of the second diaphragm assembly, and a ratio of Sd1 to Sd2 is 1:1.5-1:3.

In an embodiment, the vibration system further comprises a centering support piece, the centering support piece comprises an outer fixing portion, an inner fixing portion and a vibration arm connecting the outer fixing portion and the inner fixing portion, the outer fixing portion is connected with the shell, and the rigid connecting piece is arranged on the inner fixing portion;

The second vibrating diaphragm assembly comprises a folded ring part and a second vibrating plate which are connected, the outer periphery of the folded ring part is connected with the shell, and the inner edge of the second vibrating plate is connected with the inner edge of the diaphragm;

wherein, the internal fixation portion is connected with the second vibration plate and the voice coil, and is electrically connected with the lead wire of the voice coil.

In an embodiment, the housing includes a first shell and a second shell, the first shell is provided with the sound outlet, the outer periphery of the outer folded ring and the outer periphery of the diaphragm are both connected with the first shell, the magnetic yoke is connected with the second shell, and the outer periphery of the second diaphragm assembly is clamped between the first shell and the second shell.

In an embodiment, the side magnetic part includes a side magnet and a side magnetic conductive plate that are stacked, the side magnet is connected with the magnetic conductive yoke, the side magnetic conductive plate is disposed opposite to the central magnetic conductive plate, and a magnetizing direction of the side magnet is opposite to a magnetizing direction of the first central magnet.

The invention also provides a sounding module, which comprises:

a module shell provided with a mounting cavity and an acoustic outlet communicated with the mounting cavity, and

The sound generating device is arranged in the mounting cavity, a front sound cavity is formed between the first vibrating diaphragm assembly of the sound generating device and the module shell, and the front sound cavity is communicated with the sound outlet;

The sound generating device comprises a front sound cavity, a sound generating opening, a module shell and a sound generating channel, wherein the sound generating cavity of the sound generating device is communicated with the sound generating opening through the front sound cavity, or the module shell is further provided with the sound generating channel, the sound generating cavity of the sound generating device is communicated with the sound generating opening through the sound generating channel, or the sound generating hole of the sound generating device is directly communicated with the sound generating opening.

According to the sound production device, the magnetic circuit system and the vibration system are contained in the shell, the magnetic circuit system is arranged as the magnetic guide yoke, the central magnetic part and the side magnetic part which are arranged on the magnetic guide yoke, the side magnetic part is arranged on the outer side of the central magnetic part and surrounds the central magnetic part to form a magnetic gap, the vibration system is provided with the first vibrating diaphragm assembly, the second vibrating diaphragm assembly, the voice coil, the diaphragm and the rigid connecting piece, the inner side of the inner bending ring of the first vibrating diaphragm assembly is connected with the central magnetic part, the outer periphery of the outer bending ring is connected with the shell, one end of the voice coil is connected with the first vibrating diaphragm assembly, the other end of the voice coil is suspended in the magnetic gap, current is introduced into the voice coil in such a way, so that the voice coil converts electric energy into mechanical energy in the magnetic gap formed by the magnetic circuit system to drive the voice coil to drive the first vibrating diaphragm assembly to vibrate, sound production is realized, the central magnetic part is arranged as a magnetic structure, namely the central magnetic part comprises a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a stacked manner, and the first central magnet and the second central magnet are magnetized along the vibration direction of the vibration system, the magnetic circuit is magnetized in opposite directions, and the whole sound production device can be lifted, and the magnetic field of the sound production device is strong; simultaneously, the diaphragm and the second diaphragm assembly are sequentially arranged on one side of the first diaphragm assembly facing the magnetic yoke and positioned on the outer side of the voice coil, so that the outer edges of the diaphragm and the second diaphragm assembly are connected with the shell, the inner edge of the diaphragm is connected with the inner edge of the second diaphragm assembly to form a sound emitting cavity between the diaphragm and the second diaphragm assembly, the shell is provided with a sound emitting hole, the sound emitting cavity is communicated with the sound emitting hole, one end of the rigid connecting piece is connected with the second diaphragm assembly, the other end of the rigid connecting piece is connected with the voice coil, the voice coil drives the second vibrating diaphragm assembly to vibrate through the rigid connecting piece, the diaphragm and the second vibrating diaphragm assembly are increased on the basis of a conventional loudspeaker, the voice coil drives the second vibrating diaphragm assembly to vibrate through the rigid connecting piece when the voice generating device works, the volume between the diaphragm and the second vibrating diaphragm assembly is relatively changed to push air in the voice generating cavity to smoothly circulate through the voice generating hole, the effective vibrating area when the voice generating device vibrates is increased, performance of the voice generating device is improved, the side magnetic parts are further arranged to be multiple, an avoidance space is formed between two adjacent side magnetic parts, the second vibrating diaphragm assembly is provided with a first extending part extending to the avoidance space, the diaphragm is provided with a second extending part extending to the avoidance space, the second extending part is correspondingly connected with the first extending part, the connecting area of the second vibrating diaphragm assembly and the diaphragm is further increased, the sealing performance is improved, meanwhile, the rigid connecting piece is arranged in the avoidance space, the rigid connecting piece is arranged to be a rigid connecting part, and a fourth extending part extending towards the rigid connecting part, and the voice coil is connected with the first extending part through the rigid connecting part, and the voice coil is further connected with the voice coil vibrating diaphragm assembly in the vibration strength of the voice coil is further ensured, and the voice coil vibrating diaphragm assembly is further connected with the voice coil in the vibration process.

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 top view of an embodiment of a sound generating apparatus according to the present invention;

FIG. 2 is a schematic diagram illustrating a bottom view of an embodiment of a sound generating apparatus according to 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 cross-sectional view of another view of an embodiment of a sound generating apparatus according to the present invention;

FIG. 6 is a schematic diagram of another embodiment of a sound generating apparatus according to the present invention;

FIG. 7 is a schematic top view of an embodiment of a sound generating apparatus according to the present invention;

FIG. 8 is a schematic top view of a magnetic circuit system, a centering bracket and a rigid connection member in an embodiment of a sound generating apparatus according to the present invention;

FIG. 9 is an exploded view of FIG. 8;

FIG. 10 is a schematic top view of a magnetic circuit system connected to a centering bracket and a rigid connection member in another embodiment of a sound generating apparatus according to the present invention;

FIG. 11 is an exploded view of a centering clip and a rigid connector according to an embodiment of the present invention;

FIG. 12 is a schematic view of a centering clip and rigid connection in accordance with another embodiment of the present invention;

FIG. 13 is a schematic view of a membrane structure according to an embodiment of the invention;

FIG. 14 is a schematic diagram showing a structure of a second vibration plate according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a second vibration plate according to another embodiment of the present invention;

FIG. 16 is a schematic cross-sectional view of an embodiment of a sound module according to the present invention;

fig. 17 is a schematic cross-sectional view of another view of an embodiment of a sound module according to the present invention.

Reference numerals illustrate:

100. A sound producing device; 1, a shell; 11, a first housing; 111, sound hole, 112, side wall, 113, inner bending part, 12, second shell, 121, welding part, 2, magnetic circuit, 21, magnetic yoke, 211, avoiding structure, 22, central magnetic part, 221, first central magnet, 222, central magnetic plate, 223, second central magnet, 224, second protruding part, 23, side magnetic part, 231, side magnet, 232, side magnetic plate, 233, avoiding space, 24, magnetic gap, 3, vibration system, 31, first vibrating membrane assembly, 311, inner bending ring, 312, first vibrating plate, 3121, second bending part, 313, outer bending ring, 3131, third bending edge, 32, second vibrating membrane assembly, 321, bending ring part, 3211, first bending edge, 322, second vibrating plate, 3221, main body part, 3222, first bending part, 3223, inclined part, 3224, first extending part, 33, 331, first extending part, 34, diaphragm, 341, outer connecting part, inner connecting part, 342, inner bending edge, 35, flexible ring part, flexible part, flexible, and flexible, and 1, 35, and 1, and 500, and, and.

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," 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.

In recent years, with the rapid development of consumer electronic products, the requirements of people on the electronic products are continuously improved, and besides the performance difference of the products, for example, portability and comfort are important aspects of people, so that the conventional speaker scheme at present is difficult to simultaneously consider various design requirements of high performance, light weight and the like.

Sound emitting devices are important electroacoustic transducer components in consumer electronics, which find wide application as speakers, headphones, earphones, and the like. As the performance of electronic products improves, improvements in acoustic performance of sound emitting devices are also a necessary trend.

The sound production device comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system with a magnetic gap, wherein the magnetic circuit system drives the vibration system to vibrate and produce sound, the vibration system comprises a vibrating diaphragm fixed on the basin frame and used for vibrating and producing sound, a voice coil attached to the top of the vibrating diaphragm and inserted in the magnetic gap and connected with the top of the ball to drive the vibrating diaphragm to vibrate, namely, the sound production device drives the vibrating diaphragm in the vibration system to vibrate through the magnetic circuit system, and air is repeatedly pushed to produce sound. The vibrating diaphragm is used as a core component of the sound generating device to directly influence the acoustic performance of the sound generating device, the effective vibration area (Sd) of the vibrating diaphragm is one of important factors influencing the acoustic performance of the sound generating device, and the larger the effective vibration area of the vibrating diaphragm is, the better the acoustic performance of the sound generating device is.

However, in the sounding device of the related art, the vibration system and the magnetic circuit system are in a vertically stacked structure, and the structure of the magnetic circuit system is limited in the sounding device with the same height, so that the BL value of the magnetic field is limited, and in addition, the effective vibration area of the vibrating diaphragm of the sounding device in the related art is smaller, so that the acoustic performance of the sounding device is influenced.

Based on the above concepts and problems, the present invention proposes a sound generating apparatus 100. It is to be understood that the sound generating apparatus 100 is applied to an electronic device, which may be a mobile phone, an earphone, an intelligent wearable device, etc., and is not limited herein. In this embodiment, the sound generating device 100 of the present invention adds the diaphragm 34 and the second diaphragm assembly 32 on the basis of a conventional speaker, and uses the relative change of the volume between the diaphragm 34 and the second diaphragm assembly 32 when the sound generating device 100 works to push air, so as to increase the effective vibration area when the sound generating device 100 vibrates, thereby improving the performance of the sound generating device 100.

It can be appreciated that the sound generating device 100 of the present invention increases the effective vibration area by using the Z-directional space of the sound generating device 100, so as to increase the effective vibration area (Sd) of the sound generating device 100, and compensate for the Sd loss of the first diaphragm assembly 31 caused by the addition of the magnet to the intermediate magnetic circuit, and further improve the performance of the sound generating device 100 due to the increase of the magnetic field strength of the magnetic gap 24 by the addition of the magnet to the intermediate magnetic circuit. The sound generating device 100 of the invention combines the solutions of high performance and light weight, improves the performance of the sound generating device 100 under the same amplitude condition compared with the conventional loudspeaker, and reduces the amplitude of the sound generating device 100 under the condition of the same performance, so that the product size is light and weight.

Referring to fig. 1 to 15, in the embodiment of the invention, the sound generating device 100 includes a housing 1, a magnetic circuit 2 and a vibration system 3, wherein the housing 1 is provided with a sound generating hole 111, the magnetic circuit 2 is connected to the housing 1, the magnetic circuit 2 includes a magnetic yoke 21, a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21, the side magnetic portion 23 is disposed outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22, the central magnetic portion 22 includes a first central magnet 221, a central magnetic conductive plate 222 and a second central magnet 223 which are stacked, the first central magnet 221 and the second central magnet 223 are magnetized along the vibration direction of the vibration system 3 and have opposite magnetization directions, the first central magnet 221 is connected to the magnetic yoke 21, the side magnetic portion 23 includes a plurality of side magnetic portions, an avoiding space 233 is formed between two adjacent side magnetic portions 23, the vibration system 3 includes a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33, a diaphragm 34 and a rigid connection member 35, the first diaphragm assembly 31 includes an inner ring 311, a first vibration plate 312 and an outer ring 313 which are sequentially connected, the inner side of the inner ring 311 is connected with the second center magnet 223, the outer periphery of the outer ring 313 is connected with the housing 1, one end of the voice coil 33 is connected with the first diaphragm assembly 31, the other end of the voice coil 33 is suspended in the magnetic gap 24, the diaphragm 34 and the second diaphragm assembly 32 are sequentially arranged on one side of the first diaphragm assembly 31 facing the magnetic yoke 21 and positioned on the outer side of the voice coil 33, the outer edges of the diaphragm 34 and the second diaphragm assembly 32 are connected with the housing 1, the inner edge of the diaphragm 34 is connected with the inner edge of the second diaphragm assembly 32 to form a sounding cavity 4 communicated with the sounding hole 111 between the diaphragm 34 and the second diaphragm assembly 32, the second diaphragm assembly 32 has a first extension 3224 extending to the avoidance space 233, the diaphragm 34 has a second extension portion 344 extending to the escape space 233, the second extension portion 344 is correspondingly connected to the first extension portion 3224, wherein the rigid connection member 35 is disposed in the escape space 233, the rigid connection member 35 includes a rigid connection portion 351 and a fourth extension portion 352 extending from the rigid connection portion 351 toward the voice coil 33, the rigid connection portion 351 is connected to the first extension portion 3224, and the fourth extension portion 352 is connected to the voice coil 33.

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. The magnetic circuit 2 and the vibration system 3 of the sound generating device 100 are disposed opposite to each other.

Alternatively, the magnetic circuit 2 is square. For example, the magnetic circuit system 2 may include a center magnetic portion 22 and side magnetic portions 23 each having a square structure. In this embodiment, the vibration system 3 is optionally arranged in a square shape. It should be understood that the periphery of the first diaphragm assembly 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 speaker housing separately, 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. 3 to 6, the sound generating device 100 further includes a housing 1, and the magnetic circuit system 2 and the vibration system 3 are connected to the housing 1. Specifically, the magnetic conducting yoke 21 of the magnetic circuit system 2 is connected to one end of the housing 1, the periphery of the first diaphragm assembly 31 of the vibration system 3 is connected to the other end of the housing 1, and is disposed opposite to the magnetic circuit system 2, and the inner periphery of the first diaphragm assembly 31 is connected to the central magnetic portion 22 of the magnetic circuit system 2.

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 magnetic circuit system 2, the housing 1, and the first diaphragm assembly 31 of the vibration system 3 enclose to form a vibration cavity.

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.

It can be understood that by providing the magnetic circuit 2 as the magnetic yoke 21 and the center magnetic portion 22 and the side magnetic portions 23 provided to the magnetic yoke 21, the magnetic circuit 2 can be connected to the housing 1 through the peripheral edge of the magnetic yoke 21. In this embodiment, the side magnetic part 23 is disposed outside the center magnetic part 22 and encloses with the center magnetic part 22 to form the magnetic gap 24, so that the first diaphragm assembly 31 of the vibration system 3 is connected with one end of the housing 1 far away from the magnetic guiding yoke 21, the inner side of the first diaphragm assembly 31 is connected with the center magnetic part 22, one end of the voice coil 33 is connected with the first diaphragm assembly 31, the other end of the voice coil 33 is suspended in the magnetic gap 24, and thus, current is introduced into the voice coil 33, so that the voice coil 33 converts electric energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, and the voice coil 33 is driven to vibrate the first diaphragm assembly 31, thereby realizing sound production. Further, the central magnetic part 22 is arranged to be a magnetic structure, so that the first central magnet 221, the central magnetic conducting plate 222 and the second central magnet 223 are sequentially laminated on the magnetic conducting yoke 21 along the vertical direction, the first central magnet 221 and the second central magnet 223 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the first central magnet 221 is opposite to that of the second central magnet 223, and thus, the magnetic induction lines of the first central magnet 221 and the second central magnet 223 are gathered on the central magnetic conducting plate 222 by utilizing the magnetic conduction effect of the central magnetic conducting plate 222 and are transmitted to the magnetic gap 24 by the central magnetic conducting plate 222, so that the magnetic field with stronger magnetic field intensity is generated by the central magnetic part 22 to pass through the magnetic gap 24, the density of magnetic flux of the magnetic gap 24 is increased, the number of magnetic lines of force passing through the voice coil 33 is increased, the magnetic field force received by the voice coil 33 is increased, and BL value is effectively improved.

In this embodiment, the first diaphragm assembly 31 is configured as the inner folded ring 311, the first vibrating plate 312 and the outer folded ring 313 which are sequentially connected, so that the inner side of the inner folded ring 311 is connected with the second center magnet 223, and the outer periphery of the outer folded ring 313 is connected with the housing 1, thereby realizing the fixed connection of the first diaphragm assembly 31, and simultaneously improving the vibration performance and compliance of the first diaphragm assembly 31 through the inner folded ring 311 and the outer folded ring 313. It is understood that the first diaphragm 312 is connected to the voice coil 33, or the first diaphragm 312 is connected to the voice coil 33 through a connector or a bobbin, which is not limited herein.

Alternatively, the material of the first vibration plate 312 is a metal material or a fiber material. In the present embodiment, the vibration plate is bonded or integrally injection-molded to the outer fold ring 313 and the inner fold ring 311, respectively. It should be noted that, the inner ring 311, the first vibration plate 312, and the outer ring 313 of the first diaphragm assembly 31 may be integrally formed, so that the structural strength of the first diaphragm assembly 31 may be ensured, and the processing steps may be simplified, which is not limited herein.

In this embodiment, the outer periphery of the first vibration plate 312 forms a first step surface, the inner periphery of the first vibration plate 312 forms a second step surface, the inner side of the outer folded ring 313 extends along the direction perpendicular to the vibration direction of the vibration system 3 to form an inner ring portion, and the outer side of the inner folded ring 311 extends along the direction perpendicular to the vibration direction of the vibration system 3 to form an outer ring portion, wherein the inner ring portion is overlapped with the first step surface and is in bonding connection with the first step surface, and the outer ring portion is overlapped with the second step surface and is in bonding connection with the second step surface.

It can be appreciated that the first vibration plate 312 is adhesively connected to the outer ring 313 and the inner ring 311, respectively, not only improves connection stability, but also makes the assembly structure more compact, and ensures vibration performance of the entire first diaphragm assembly 31. Of course, in other embodiments, the inner ring portion of the outer ring 313 and the outer ring portion of the inner ring 311 may be connected to the same side of the first vibration plate 312 (for example, the upper surface of the first vibration plate 312 or the lower surface of the first vibration plate 312) or the inner ring portion of the outer ring 313 and the outer ring portion of the inner ring 311 may be connected to different sides of the first vibration plate 312, which is not limited herein.

In this embodiment, as shown in fig. 1 and fig. 3 to fig. 6, the inner ring 311 of the first diaphragm assembly 31 may be a sealing structure, that is, the inner side of the inner ring 311 is in a flat plate shape, and the flat plate shape of the inner ring 311 is connected and adhered to the side of the central magnetic portion 22 of the magnetic circuit system 2 facing away from the magnetic yoke 21.

Of course, in other embodiments, the first diaphragm assembly 31 may alternatively be of annular configuration. In the present embodiment, the inner side of the inner folded ring 311 is provided with a hollow hole, and a part of the central magnetic portion 22 is exposed in the hollow hole or a part of the central magnetic portion 22 is penetrated in the hollow hole, which is not limited herein.

In this embodiment, the outer folding ring 313 and the inner folding ring 311 of the first diaphragm assembly 31 may be convex hull structures that are convex upward or concave structures that are concave downward, which are not limited herein. In order to avoid the diaphragm 34 and the second diaphragm assembly 32, the outward fold 313 of the first diaphragm assembly 31 may optionally be convex in a direction away from the magnetic circuit 2. It will be appreciated that, in order to avoid the invagination ring 311 of the first diaphragm assembly 31 interfering with the central magnetic portion 22 of the magnetic circuit system 2 during vibration, the invagination ring 311 of the first diaphragm assembly 31 may alternatively be convex in a direction away from the magnetic circuit system 2. Alternatively, both the inner fold ring 311 and the outer fold ring 313 are convex in a direction away from the magnetic circuit system 2.

In order to further increase the connection area between the outer rim 313 of the first diaphragm assembly 31 and the housing 1 and improve stability, in this embodiment, as shown in fig. 3 to 6, the outer periphery of the outer rim 313 is bent and extended to form a third flange 3131, and the third flange 3131 is connected to the outer wall of the housing 1. It can be appreciated that the outer periphery of the outer fold ring 313 has a straight portion parallel to the first vibration plate 312, the straight portion is connected with the end face of the housing 1, and the third flange 3131 is formed by bending and extending the outer side of the straight portion toward the direction close to the magnetic circuit system 2, so that the third flange 3131 is connected with the outer side wall of the housing 1, thereby increasing the connection area with the housing 1, and improving the connection stability and waterproof sealing performance.

To achieve electrical connection of the voice coil 33 to an external circuit. In one embodiment, as shown in fig. 3 to 12, the vibration system 3 further includes a centering support 36, one end of the centering support 36 is connected to the voice coil 33 and is connected to the lead wire of the voice coil 33, and the other end of the centering support 36 is connected to the housing 1.

It will be appreciated that both ends of the centering support 36 are electrically connected to leads of the voice coil 33 and an external circuit, respectively. In this embodiment, the centering pads 36 may be disposed at the bottom of the voice coil 33, and the centering pads 36 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 36 may be disposed on top of the voice coil 33, and the centering support 36 is located between the voice coil 33 and the diaphragm 31, which is not limited herein.

In this embodiment, by arranging the diaphragm 34 and the second diaphragm assembly 32 of the vibration system 3 on the side of the first diaphragm assembly 31 facing the yoke 21 and on the outer side of the voice coil 33 in sequence, the outer edges of the diaphragm 34 and the second diaphragm assembly 32 are both connected with the housing 1, the inner edge of the diaphragm 34 is connected with the inner edge of the second diaphragm assembly 32 to form the sound emitting cavity 4 between the diaphragm 34 and the second diaphragm assembly 32, and the sound emitting hole 111 is provided on the housing 1, so that the sound emitting cavity 4 is communicated with the sound emitting hole 111, and one end of the rigid connecting piece 35 is connected with the second diaphragm assembly 32, and the other end of the rigid connecting piece 35 is connected with the voice coil 33, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connecting piece 35.

It can be understood that current is introduced into the voice coil 33, the voice coil 33 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, so as to drive the voice coil 33 to drive the first diaphragm assembly 31 to vibrate, thereby realizing sound production, and meanwhile, the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection piece 35, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 is relatively changed to push air in the sound producing cavity 4 to smoothly circulate through the sound outlet 111, at this moment, the sound producing device 100 increases the diaphragm 34 and the second diaphragm assembly 32 on the basis of a conventional loudspeaker, and when the sound producing device 100 works, the voice coil 33 simultaneously drives the first diaphragm assembly 31, the second diaphragm assembly 32 and the diaphragm 34 to vibrate, so that the effective vibration area when the sound producing device 100 vibrates is increased, and the performance of the sound producing device 100 is improved.

In this embodiment, the structure of the second diaphragm assembly 32 may be a diaphragm structure or other structure capable of vibrating to sound, which is not limited herein. The structure of the diaphragm 34 may be a structure capable of vibrating and deforming, and is not limited herein. Optionally, the diaphragm 34 is a flexible member, and the diaphragm 34 is made of a single-layer PEEK (polyether ether ketone) film, a composite PEEK (polyether ether ketone) film, or other flexible materials. It can be appreciated that the rigid connection member 35 is used to connect the voice coil 33 and the second diaphragm assembly 32, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, and the rigid connection member 35 may be made of metal materials such as stainless steel or other materials with certain strength such as carbon fiber, which is not limited herein.

It should be noted that, the sound generating cavity 4 formed between the diaphragm 34 and the second diaphragm assembly 32 is a sealed front cavity, when the sound generating device 100 works, the vibration directions of the first diaphragm assembly 31 and the second diaphragm assembly 32 are the same, and when the volume change of the sound generating cavity 4 is utilized to increase the working air volume, so as to increase the effective vibration area of the product. Meanwhile, by arranging the diaphragm 34 and the second diaphragm assembly 32, the effective vibration area of the sound generating device 100 is increased by utilizing the Z-directional space of the sound generating device 100, so that the Sd of the sound generating device 100 is increased, and the Sd loss caused by the connection of the inner folded ring 311 of the first diaphragm assembly 31 and the central magnetic part 22 is reduced, so that the performance of the sound generating device 100 is improved.

Optionally, the effective vibration area Sd1 of the diaphragm 34 is smaller than the effective vibration area Sd2 of the second diaphragm assembly 32, and the ratio of Sd1 to Sd2 is 1:1.5-1:3. In the present embodiment, the ratio of the effective vibration area Sd1 of the diaphragm 34 to the effective vibration area Sd2 of the second diaphragm assembly 32 may be 1:1.5, 1:1.8, 1:2, 1:2.3, 1:2.5, 1:2.8, 1:3, etc., which are not limited herein.

It can be appreciated that, when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform, so that the diaphragm 34 acts against the volume of the pushing air, the second diaphragm assembly 32 acts forward on the volume of the pushing air, and the volume of the pushing air is increased during operation by utilizing the volume change of the sound generating cavity 4, so that the effective vibration area of the product is increased.

In one embodiment, the side magnetic portions 23 include a plurality of side magnetic portions 23, and an avoidance space 233 is formed between two adjacent side magnetic portions 23, the second vibration plate 322 has a first extension portion 3224 extending to the avoidance space 233, the diaphragm 34 has a second extension portion 344 extending to the avoidance space 233, and the second extension portion 344 is correspondingly connected to the first extension portion 3224.

In this embodiment, as shown in fig. 3, 7 to 9 and 15, by arranging the plurality of side magnetic portions 23, the plurality of side magnetic portions 23 are encircling and spaced on the outer side of the central magnetic portion 22, so that an avoidance space 233 is formed between two adjacent side magnetic portions 23, and thus the avoidance space 233 is utilized to provide avoidance and movement space for the rigid connection member 35, that is, the rigid connection member 35 is arranged in the avoidance space 233, so that one end of the rigid connection member 35 is connected with the second diaphragm assembly 32, and the other end of the rigid connection member 35 is connected with the voice coil 33, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35.

It can be appreciated that by providing the first extension portion 3224 on the second diaphragm assembly 32, such that the first extension portion 3224 extends toward the avoidance space 233 and is connected with the rigid connection member 35, connection stability between the second diaphragm assembly 32 and the rigid connection member 35 can be increased, so as to ensure that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35. Alternatively, the first extension portion 3224 is formed by the second vibration plate 322 extending toward the escape space 233.

In the present embodiment, as shown in fig. 13, the diaphragm 34 has the second extension portion 344 extending to the escape space 233, and the second extension portion 344 is correspondingly connected to the first extension portion 3224, thereby further increasing the connection stability and the sealing property of the diaphragm 34 and the second vibration plate 322. It will be appreciated that as shown in fig. 13, the inner connecting portion 343 of the diaphragm 34 and the second flange 3431 each extend into the escape space 233 and form the second extending portion 344, which is not limited herein.

It will be appreciated that, as shown in fig. 3 and 8 to 12, by providing the rigid connection member 35 as the rigid connection portion 351 and the fourth extension portion 352, the rigid connection member 35 may be connected to the first extension portion 3224 of the second diaphragm assembly 32 through the rigid connection portion 351 and connected to the voice coil 33 through the fourth extension portion 352, so as to ensure the connection strength of the rigid connection member 35 to connect the voice coil 33 to the second diaphragm assembly 32, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process.

In another embodiment, the side magnetic portions 23 include a plurality of side magnetic portions 23, an avoidance space 233 is formed between two adjacent side magnetic portions 23, the voice coil 33 has a first protruding portion 331 extending to the avoidance space 233, the center magnetic portion 22 has a second protruding portion 224 extending to the avoidance space 233, and the first protruding portion 331 is disposed opposite to the second protruding portion 224.

In this embodiment, as shown in fig. 10, a plurality of side magnetic portions 23 are encircling and spaced on the outer side of the central magnetic portion 22, so that an avoidance space 233 is formed between two adjacent side magnetic portions 23, by arranging the first protruding portion 331 on the voice coil 33, the first protruding portion 331 extends to the avoidance space 233, and arranging the second protruding portion 224 on the central magnetic portion 22, the second protruding portion 224 extends to the avoidance space 233, and is spaced from and corresponds to the first protruding portion 331, so that the length of the wire of the voice coil 33 is increased, so that the voice coil 33 and the second diaphragm assembly 32 are connected by the rigid connecting piece 35 conveniently, the magnet volume of the central magnetic portion 22 is increased, the magnetic field strength is effectively improved, and the BL value of the sounding device 100 can be further improved.

It can be appreciated that the central magnetic portion 22 may be selected to be a rectangular structure, the voice coil 33 may be selected to be a rectangular voice coil, the avoiding space 233 of the side magnetic portion 23 is disposed corresponding to the corner positions of the central magnetic portion 22, the four corner positions of the voice coil 33 are respectively provided with the first protruding portions 331, and the four corner positions of the central magnetic portion 22 are respectively provided with the second protruding portions 224, which is not limited herein.

In the sound generating device 100 of the present invention, the magnetic circuit 2 and the vibration system 3 are housed in the case 1, the magnetic circuit 2 is provided as the yoke 21, and the center magnetic portion 22 and the side magnetic portion 23 are provided on the yoke 21, so that the side magnetic portion 23 is positioned outside the center magnetic portion 22, and forms the magnetic gap 24 by surrounding the center magnetic portion 22, and the vibration system 3 is provided with the first diaphragm assembly 31, the second diaphragm assembly 32, the voice coil 33, the, The diaphragm 34 and the rigid connecting piece 35 enable the inner side of the inner bending ring 311 of the first diaphragm assembly 31 to be connected with the central magnetic part 22, the outer periphery of the outer bending ring 313 to be connected with the shell 1, one end of the voice coil 33 is connected with the first diaphragm assembly 31, the other end of the voice coil 33 is suspended in the magnetic gap 24, and thus current is introduced into the voice coil 33, so that the voice coil 33 converts electric energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, the voice coil 33 is driven to drive the first diaphragm assembly 31 to vibrate, sound production is achieved, the central magnetic part 22 is of a magnetic structure, and therefore the magnetic field intensity of the magnetic circuit system 2 of the sound production device 100 can be improved, and the performance of the sound production device 100 is integrally improved; simultaneously, the diaphragm 34 and the second diaphragm assembly 32 are sequentially arranged on one side of the first diaphragm assembly 31 facing the magnet yoke 21 and positioned on the outer side of the voice coil 33, so that the outer edges of the diaphragm 34 and the second diaphragm assembly 32 are connected with the shell 1, the inner edge of the diaphragm 34 is connected with the inner edge of the second diaphragm assembly 32, so that a sound generating cavity 4 is formed between the diaphragm 34 and the second diaphragm assembly 32, a sound generating hole 111 is arranged in the shell 1, the sound generating cavity 4 is communicated with the sound generating hole 111, one end of the rigid connecting piece 35 is connected with the second diaphragm assembly 32, the other end of the rigid connecting piece 35 is connected with the voice coil 33, the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connecting piece 35, the diaphragm 34 and the second diaphragm assembly 32 are additionally arranged on the basis of a conventional loudspeaker, when the voice coil 33 works by utilizing the sound generating device 100, the volume between the diaphragm 34 and the second diaphragm assembly 32 is relatively changed to push air in the sound generating cavity 4 to smoothly circulate through the sound generating hole 111, the sound generating device 100 is further provided with a plurality of side magnetic parts 23, a avoidance space 233 is formed between two adjacent side magnetic parts 23, a first extension part 3224 extending to the avoidance space 233 is arranged on the second diaphragm assembly 32, a second extension part 344 extending to the avoidance space 233 is arranged on the diaphragm 34, the second extension part 344 is correspondingly connected with the first extension part 3224, the connection area of the second diaphragm assembly 32 and the diaphragm 34 is further increased, the stability is improved, the sealing performance is improved, meanwhile, the rigid connecting piece 35 is arranged in the avoidance space 233, the rigid connecting piece 35 is provided with a rigid connecting part 351 and a fourth extension part 352 extending from the rigid connecting part 351 towards the voice coil 33, the rigid connecting part 351 is connected with the first extension part 3224, the fourth extension part 352 is connected with the voice coil 33, and accordingly the connection strength of the voice coil 33 connected with the second diaphragm assembly 32 is ensured, and the voice coil assembly 32 is driven by the rigid connecting piece 35 in the vibration process.

In one embodiment, the first diaphragm 312 is bent and extended toward the voice coil 33 to form a second bending portion 3121, and the second bending portion 3121 is connected to the voice coil 33.

In the present embodiment, as shown in fig. 3 to 5, by providing the second bending portion 3121 on the first vibration plate 312, the second bending portion 3121 extends toward the voice coil 33, so that the first vibration plate 312 is connected to the voice coil 33 through the second bending portion 3121, and the voice coil 33 is suspended at a relatively reasonable position in the magnetic gap 24 by the second bending portion 3121, so as to ensure the vibration effect of the voice coil 33 driven by the magnetic circuit system 2.

It is understood that the second bending portion 3121 is formed by bending and extending the inner side of the first vibration plate 312 toward the direction approaching the voice coil 33. Alternatively, the first vibration plate 312 and the second bending portion 3121 are integrally formed, such as integrally injection molded or integrally press molded, and the like, which is not limited herein.

In another embodiment, the first diaphragm assembly 31 further includes a bracket, and both ends of the bracket are connected to the first diaphragm 312 and the voice coil 33, respectively. It can be appreciated that the bracket may be connected to the first vibration plate 312 by bonding, welding or integral injection molding, so that the first vibration plate 312 is connected to the voice coil 33 through the bracket, and the voice coil 33 is suspended at a relatively reasonable position in the magnetic gap 24 by using the bracket, so as to ensure the vibration effect of the voice coil 33 driven by the magnetic circuit system 2.

In an embodiment, the second diaphragm assembly 32 includes a ring portion 321 and a second vibration plate 322, the outer periphery of the ring portion 321 is connected to the housing 1, the second vibration plate 322 includes a main body portion 3221 connected to the inner edge of the ring portion 321, and a first bending portion 3222 formed by bending and extending the main body portion 3221 toward the diaphragm 34, and the first bending portion 3222 is connected to the inner edge of the diaphragm 34, where a side of the main body portion 3221 away from the ring portion 321 extends toward the avoidance space 233 to form a first extension portion 3224.

In this embodiment, the ring portion 321 of the second diaphragm assembly 32 may be a convex hull structure protruding upward or a concave structure recessing downward, which is not limited herein. In order to facilitate the connection between the ring-folding portion 321 and the housing 1, as shown in fig. 4 to 6, the outer periphery of the ring-folding portion 321 is folded to form a first flange 3211, and the first flange 3211 is connected to the outer wall of the housing 1.

It can be appreciated that the first flange 3211 is formed by extending the outer periphery of the hinge 321 along the vibration direction of the vibration system, and the first flange 3211 may be connected to the outer sidewall of the casing 1, so that the connection area between the hinge 321 and the casing 1 may be increased, and the connection stability and waterproof tightness may be improved. Of course, the outer side of the collar 321 has a horizontal portion extending in a direction perpendicular to the vibration direction of the vibration system, and the horizontal portion is connected to the end surface of the housing 1, and the outer side of the horizontal portion extends in the vibration direction of the vibration system to form a first flange 3211, which is not limited herein.

In the present embodiment, by providing the second vibration plate 322 as the main body portion 3221 and the first bending portion 3222 such that an end of the main body portion 3221 away from the first bending portion 3222 is connected to the inner edge of the ring-folded portion 321, the first bending portion 3222 is connected to the inner edge of the diaphragm 34, so that the inner edge of the diaphragm 34 is connected to the side edge of the second diaphragm assembly 32, so that the diaphragm 34, the second vibration plate 322 of the second diaphragm assembly 32, the ring-folded portion 321, and the housing 1 form the sound generating cavity 4. It will be appreciated that the second diaphragm plate 322 of the second diaphragm assembly 32 is connected to the voice coil 33 by a rigid connection 35. When the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform.

Alternatively, the ring portion 321 of the second diaphragm assembly 32 and the second diaphragm 322 are bonded or integrally injection molded, which is not limited herein. In the present embodiment, the main body portion 3221 and the first bending portion 3222 of the second vibration plate 322 are integrally formed, and the first bending portion 3222 is formed by bending and extending the main body portion 3221 toward the diaphragm 34, for example, by injection molding or press molding, which is not limited herein.

In one embodiment, an inclined portion 3223 is formed at a connection portion between the main body portion 3221 and the first bending portion 3222, and the inclined portion 3223 is disposed at an angle with respect to a vibration direction of the vibration system 3.

It will be appreciated that, as shown in fig. 3 to 5 and 14, the inclined portion 3223 is disposed at an angle to the vibration direction of the vibration system 3, and the angle is optionally greater than 0 ° and less than 90 °. The inclined portion 3223 may enhance the rigidity of the second vibration plate 322 in the horizontal direction (i.e., perpendicular to the vibration direction of the vibration system 3), thereby enhancing the vibration performance of the second vibration film assembly 32, and enhancing the feasibility of molding. Meanwhile, the inclined part 3223 is far away from the magnetic circuit system 2 relative to the inner edge of the second vibration plate 322, so that the outer edge of the magnetic circuit system 2 is outwards inclined and expanded, the size of the magnetic circuit system 2 is increased, BL of the sound generating device 100 is further improved, and the inclined part 3223 is more convenient for positioning connection of the second vibration plate 322 and the folded ring part 321, and connection accuracy is improved. Alternatively, the second vibration plate 322 may be a magnesium aluminum alloy, a magnesium lithium alloy, or the like, without limitation.

In an embodiment, the diaphragm 34 is a flexible member, and the diaphragm 34 includes an outer connecting portion 341, a deformation portion 342 and an inner connecting portion 343 sequentially connected, where an outer periphery of the outer connecting portion 341 is connected with the housing 1, an inner edge of the inner connecting portion 343 is connected with the first bending portion 3222, the deformation portion 342 is in a bending shape, and the inner connecting portion 343 extends toward the avoidance space 233 to form a second extending portion 344 corresponding to the first extending portion 3224.

In this embodiment, as shown in fig. 3 to 5 and 13, by setting the diaphragm 34 as a flexible member, when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to push the air in the sound generating cavity 4 to smoothly circulate through the sound outlet 111, so as to increase the effective vibration area when the sound generating device 100 vibrates, thereby improving the performance of the sound generating device 100.

It can be understood that, by setting the diaphragm 34 as the outer connecting portion 341, the deformation portion 342 and the inner connecting portion 343, the outer periphery of the outer connecting portion 341 is connected with the housing 1, and the inner edge of the inner connecting portion 343 is connected with the first bending portion 3222, so that the diaphragm 34 and the housing 1 can be connected and fixed through the outer connecting portion 341, and can be connected with the inner edge of the second diaphragm assembly 32 through the inner connecting portion 343, so that a sealed sound-producing cavity 4 is formed between the diaphragm 34 and the second diaphragm assembly 32, and meanwhile, the deformation portion 342 is set as a bending shape, so that the deformability of the diaphragm 34 is improved, and when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connecting piece 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform.

In an embodiment, the inner edge of the inner connecting portion 343 is bent and extended toward the first bending portion 3222 to form a second flange 3431, and the second flange 3431 is connected to the first bending portion 3222.

In this embodiment, as shown in fig. 3 to 5 and 13, by providing the second flange 3431 at the inner edge of the inner connecting portion 343, the second flange 3431 is further used to connect with the first bending portion 3222, so that not only the connection stability is improved, but also the waterproof sealing performance is further improved. Alternatively, the second flange 3431 is formed by bending and extending the inner edge of the inner connecting portion 343 toward the first bending portion 3222.

Alternatively, the outer connecting portion 341, the deformation portion 342, the inner connecting portion 343, and the second flange 3431 of the diaphragm 34 are integrally formed, such as integrally injection molded or integrally punched, and the like, which are not limited herein.

In this embodiment, the compliance of diaphragm 34 is optionally greater than the compliance of bellows ring portion 321. It can be appreciated that when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, the diaphragm 34 only plays a role in isolation and sealing, and does not generate a reverse acting force on the vibration of the second diaphragm assembly 32, so that the low-frequency sensitivity of the loudspeaker is improved.

It will be appreciated that the compliance of diaphragm 34 is optionally greater than the compliance of the inner fold ring 311 of first diaphragm assembly 31, and that the compliance of diaphragm 34 is optionally greater than the compliance of the outer fold ring 313 of first diaphragm assembly 31. Thus, the diaphragm 34 only plays a role of sealing, and does not generate a reverse effect on the vibration of the first diaphragm assembly 31 and the second diaphragm assembly 32, thereby improving the low-frequency sensitivity.

Alternatively, the deformation portion 342 protrudes in a direction away from the first diaphragm assembly 31, the gimbal portion 321 protrudes in a direction close to the first diaphragm assembly 31, and the deformation portion 342 and the gimbal portion 321 are disposed in a dislocation manner in a direction perpendicular to the vibration system 3. It will be appreciated that the arrangement is such that the bellows portion 321 of the second diaphragm assembly 32 does not interfere with the deformation portion 342 of the diaphragm 34 during vibration. Of course, in other embodiments, the ring portion 321 may also protrude away from the first diaphragm assembly 31, which is not limited herein.

In an embodiment, along the vibration direction of the vibration system 3, the projection width L1 of the deformation portion 342 is greater than or equal to the projection width L2 of the folded ring portion 321, and the ratio of L1 to L2 is 1:1 to 3:1.

In this embodiment, as shown in fig. 4, in the vibration direction of the vibration system 3, by setting the projection width L1 of the deformation portion 342 of the diaphragm 34 to be greater than or equal to the projection width L2 of the folded ring portion 321 of the second diaphragm assembly 32, the effective vibration area Sd2 of the second diaphragm assembly 32 can be effectively ensured to be greater than the effective vibration area Sd1 of the diaphragm 34, so that when the voice coil 33 drives the second diaphragm assembly 32 and the diaphragm 34 to vibrate, the diaphragm 34 reacts to the pushing air volume, the second diaphragm assembly 32 acts forward to the pushing air volume, and the volume of pushing air is increased when the volume of the sound generating cavity 4 is increased, thereby realizing the increase of the effective vibration area of the product.

Optionally, the ratio of L1 to L2 is 1:1, 1.5:1, 2:1, 2.5:1, 3:1, etc., without limitation.

In an embodiment, the vibration system 3 further includes a centering support 36, the centering support 36 includes an outer fixing portion 361, an inner fixing portion 362, and a vibration arm 363 connecting the outer fixing portion 361 and the inner fixing portion 362, the outer fixing portion 361 is connected to the case 1, the rigid connection member 35 is provided at the inner fixing portion 362, the second diaphragm assembly 32 includes a folder portion 321 and a second diaphragm 322 connected to each other, an outer periphery of the folder portion 321 is connected to the case 1, an inner edge of the second diaphragm 322 is connected to an inner edge of the diaphragm 34, and the inner fixing portion 362 is connected to the second diaphragm 322 and the voice coil 33 and is electrically connected to a lead wire of the voice coil 33.

In this embodiment, as shown in fig. 3 to 12, the positioning of the centering support 36 makes the voice coil 33 connected and conducted with an external circuit through the centering support 36, and the positioning of the centering support 36 to the vibration of the voice coil 33 through the rigid connection member 35 prevents the voice coil 33 from swinging or polarizing during the vibration process.

In order to avoid interference or influence of the centering support 36 on the second diaphragm assembly 32, the annular ring 321 of the second diaphragm assembly 32 protrudes toward a direction approaching the first diaphragm assembly 31. It will be appreciated that the number of centring tabs 36 may be one or more. When the number of the centering support pieces 36 is plural, the plurality of centering support pieces 36 are distributed correspondingly along the long axis direction and/or the short axis direction of the magnetic circuit system 2 and/or the four corners of the magnetic circuit system 2.

It can be understood that the plurality of centering support pieces 36 may be symmetrically distributed along the long axis direction of the magnetic circuit system 2, the plurality of centering support pieces 36 may also be symmetrically distributed along the short axis direction of the magnetic circuit system 2, and the plurality of centering support pieces 36 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 36 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 36 may include two or four, so that the voice coil 33 can be connected to an external circuit by the centering support 36, and the vibration balance of the sound generating apparatus 100 can be ensured.

In one embodiment, the centering support 36 includes an outer fixing portion 361, an inner fixing portion 362, and a vibrating arm 363 connecting the outer fixing portion 361 and the inner fixing portion 362, the outer fixing portion 361 being connected to the housing 1, and the rigid connection member 35 being provided at the inner fixing portion 362.

In the present embodiment, as shown in fig. 3 and 7 to 12, the internal fixing portion 362 is connected to the second diaphragm plate 322 of the second diaphragm assembly 32 and the voice coil 33, and is electrically connected to the lead wire of the voice coil 33. Alternatively, the inner fixing portion 362 is provided with an inner land 3623, and the lead wire of the voice coil 33 is connected to the inner land 3623. Thus, the lead wire wiring connection of the voice coil 33 can be conveniently realized, and the connection and conduction with an external circuit can be smoothly realized.

Alternatively, the rigid connection 35 is disposed on a side of the inner fixing portion 362 remote from the second diaphragm assembly 32. It can be appreciated that the distance between the centering support 36 and the magnetic circuit 2 is increased, and only the part of the magnetic circuit 2 is required to avoid the rigid connecting piece 35, so that the height of the sound generating device 100 is not required to be additionally increased to meet the amplitude of the vibration system 3, thereby being beneficial to the thinning arrangement.

Alternatively, as shown in fig. 3 and 8 to 12, the outer fixing portion 361, the vibrating arm 363, and the inner fixing portion 362 of the centering support 36 may be selected as an integrally molded structure. Thus, the structural strength of the centering support 36 can be effectively ensured, and the processing steps of the centering support 36 are simplified. To ensure deformability of the centering web 36, the vibrating arms 363 optionally have at least one bend.

In one embodiment, as shown in fig. 3 and 8 to 12, the outer fixing portion 361 is provided in a ring shape, the outer fixing portion 361 has a short axis side and a long axis side which are alternately connected, the vibrating arm 363 is led out from one side of the inner fixing portion 362 corresponding to the short axis side and extends along the long axis side after being bent, and the vibrating arm 363 is connected to a central region of the long axis side.

In this embodiment, as shown in fig. 3 and 8 to 12, the centering support 36 is one, where the outer fixing portion 361 of the centering support 36 may be a rectangular ring structure, the vibrating arm 363 includes at least two, and the inner fixing portions 362 may be four. It will be appreciated that such an arrangement may increase the length of the resonating arms 363, lifting the stress of the resonating arms 363, thereby improving reliability.

Alternatively, the vibrating arms 363 include four, and the inner fixing portions 362 include four. Each of the inner fixing portions 362 is connected to the outer fixing portion 361 through a vibrating arm 363. Alternatively, four vibrating arms 363 and four inner fixing portions 362 are provided corresponding to four corner positions of the rectangular ring outer fixing portion 361, respectively. In the present embodiment, the four internal fixing portions 362 are disposed corresponding to the avoiding spaces 233 of the magnetic parts 23, respectively, and at least part of the internal fixing portions 362 passes through the avoiding spaces 233, extends into the magnetic gap 24, and is connected to the voice coil 33, which is not limited herein.

It will be appreciated that, as shown in fig. 3 and 8 to 12, the outer fixing portion 361, the vibrating arm 363, and the inner fixing portion 362 of the centering bracket 36 may be located on the same plane. Of course, in other embodiments, the outer fixing portion 361 and the inner fixing portion 362 of the centering support 36 may also be located on different planes, which is not limited herein.

In this embodiment, as shown in fig. 3, 7 and 8, the voice coil 33 is optionally rectangular ring-shaped, and four internal fixing portions 362 of the centering support 36 are respectively disposed corresponding to four corner positions of the voice coil 33, which is not limited herein. It will be appreciated that the outer fixing portion 361 of the centering bracket 36 is adhesively connected to the housing 1, and the inner fixing portion 362 and the rigid connection member 35 may be adhesively connected, welded or integrally formed, which is not limited herein. Therefore, the length of the external dimension of the product can be utilized, the length of the vibrating arm 363 of the centering support piece 36 is increased, so that the reliability is better when the vibration system works at large amplitude, and meanwhile, the centering support piece 36 provides constraint for the vibration system 3, so that poor performance caused by product polarization at large amplitude can be better restrained.

In order to better connect with an external circuit, in an embodiment, as shown in fig. 1 to 3, 5, 6, and 8 to 12, the centering support 36 further includes a conductive portion 364, one end of the conductive portion 364 is connected with the external fixing portion 361, and the other end of the conductive portion 364 extends in a direction away from the housing 1 and is provided with an external bonding pad 365. By this arrangement, the external bonding pad 365 can be guided to the outside of the casing 1 through the conductive portion 364, so that the connection and conduction between the external circuit and the centering support 36 are facilitated, and the current is ensured to be introduced into the voice coil 33.

In one embodiment, the yoke 21 is provided with the avoiding structure 211 corresponding to the inner fixing portion 362. It will be appreciated that, as shown in fig. 2, 3 and 9, by providing the avoidance structure 211 on the magnetic yoke 21, the avoidance structure 211 may be used to provide avoidance for the centering pad 36 during vibration along with the second diaphragm assembly 32, so as to ensure that the inner fixing portion 362 or the rigid connection member 35 of the centering pad 36 does not touch the magnetic yoke 21.

Optionally, relief structures 211 are recessed slots or through holes. It can be understood that the avoidance structure 211 is a concave groove, that is, a groove structure formed by recessing the side of the magnetic yoke 21 facing the centering strip 36 in a direction away from the centering strip 36. The avoiding structure 211 is a through hole, that is, the through hole penetrates through the magnetic yoke 21, and meanwhile, the avoiding structure 211 can also be used as a venting hole of the sound generating device 100 to ensure that the air flow of the vibration cavity of the sound generating device 100 is communicated with the air flow of the outside in the vibration process of the first diaphragm assembly 31, so that the balance of the internal pressure and the external pressure is ensured.

In one embodiment, the inner fixing portion 362 includes a body portion 3621 and a third extension portion 3622 extending from the body portion 3621 toward the voice coil 33, the body portion 3621 is connected to the second diaphragm 322, the third extension portion 3622 is connected to the voice coil 33, and the third extension portion 3622 or the body portion 3621 is provided with an inner pad 3623 electrically connected to a lead wire of the voice coil 33.

In the present embodiment, as shown in fig. 3 and 8 to 12, by providing the inner fixing portion 362 of the centering support 36 as the body portion 3621 and the third extending portion 3622, the third extending portion 3622 extends toward the voice coil 33, so that the body portion 3621 of the inner fixing portion 362 is connected to the second diaphragm 322 of the second diaphragm assembly 32, and at the same time, the inner fixing portion 362 of the centering support 36 is connected to the voice coil 33 through the third extending portion 3622, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during vibration.

It will be appreciated that by providing the third extension portion 3622 or the body portion 3621 with the inner pad 3623, electrical connection to the leads of the voice coil 33 using the inner pad 3623 is facilitated, thus ensuring that the voice coil 33 is electrically connected to an external circuit through the centering pads 36.

In one embodiment, the rigid connection portion 351 is connected to the body portion 3621, and the fourth extension portion 352 is correspondingly connected to the third extension portion 3622.

In the present embodiment, as shown in fig. 3 and 8 to 12, by providing the rigid connection member 35 with the rigid connection portion 351 and the fourth extension portion 352, the rigid connection member 35 is connected to the inner fixing portion 362 of the centering support 36 through the rigid connection portion 351 and is connected to the voice coil 33 by the fourth extension portion 352, so that the connection strength of the rigid connection member 35 to the voice coil 33 and the second diaphragm assembly 32 is ensured, and the voice coil 33 is further ensured to vibrate the second diaphragm assembly 32 during the vibration process.

In one embodiment, the housing 1 includes a first shell 11 and a second shell 12, the first shell 11 is provided with an acoustic hole 111, the outer periphery of the folded-out ring 313 and the outer periphery of the diaphragm 34 are connected to the first shell 11, the magnetic yoke 21 is connected to the second shell 12, and the outer periphery of the second diaphragm assembly 32 is sandwiched between the first shell 11 and the second shell 12.

In the present embodiment, as shown in fig. 3 to 6 and 9, by providing the housing 1 as the first case 11 and the second case 12, it is convenient to realize fixed mounting of the first diaphragm assembly 31 and the outer peripheral edge of the diaphragm 34 with the first case 11, and to realize mounting fixation of the magnetic circuit 2 with the second case 12, while realizing mounting fixation of the second diaphragm assembly 32 with the first case 11 and the second case 12.

It will be appreciated that the outer periphery of the outer fold 313 of the first diaphragm assembly 31 and the outer periphery of the diaphragm 34 are both connected to the first housing 11, the yoke 21 is connected to the second housing 12, and the outer periphery of the second diaphragm assembly 32 is sandwiched between the first housing 11 and the second housing 12.

In an embodiment, as shown in fig. 3 to 12, the vibration system 3 further includes a centering support 36, the centering support 36 includes an outer fixing portion 361, an inner fixing portion 362, and a vibration arm 363 connecting the outer fixing portion 361 and the inner fixing portion 362, the outer fixing portion 361 is interposed between the second housing 12 and an outer periphery of the second diaphragm assembly 32, the rigid connection member 35 is provided at the inner fixing portion 362, and the inner fixing portion 362 is connected to the voice coil 33 and electrically connected to a lead wire of the voice coil 33.

In this embodiment, the housing 1 may be a plastic housing or a metal housing, that is, the first housing 11 and the second housing 12 may be both plastic housings or metal housings. Of course, in other embodiments, one of the first shell 11 and the second shell 12 of the housing 1 is a plastic shell, the other is a metal shell, etc., which is not limited herein.

Alternatively, the second casing 12 of the housing 1 and the magnetic yoke 21 are integrally formed. It can be understood that when the second housing 12 is a plastic housing, the second housing 12 and the magnetic yoke 21 are integrally injection molded, and when the second housing 12 is a metal housing, the second housing 12 and the magnetic yoke 21 are integrally molded, which is not limited herein.

In an embodiment, the first housing 11 may be selected to be a metal housing, and the second housing 12 may be selected to be a metal housing.

In order to further improve the connection stability between the first housing 11 and the second housing 12 or the yoke 21, in one embodiment, as shown in fig. 6, the first housing 11 is provided with a welded portion 121 extending toward the yoke 21, and the welded portion 121 is welded to the yoke 21 or the second housing 12. In another embodiment, as shown in fig. 6, the yoke 21 or the second case 12 is provided with a welded portion 121 extending toward the first case 11, and the welded portion 121 is welded to the outer wall of the first case 11.

Of course, in yet another embodiment, the sound generating device 100 further includes a metal soldering lug, one end of the metal soldering lug is welded to the magnetic yoke 21 or the second housing 12, and the other end of the metal soldering lug is welded to the outer wall of the first housing 11. It will be appreciated that the connection stability of the first housing 11 to the second housing 12 or the magnetic yoke 21 can thus be further improved by means of the metal tabs.

In an embodiment, the first housing 11 has a side wall 112 and an inner bending portion 113 formed by bending and extending an end of the side wall 112 away from the second housing 12 towards the inner side, the outer bending ring 313 and the outer periphery of the diaphragm 34 are both connected to the inner bending portion 113, and the outer periphery of the second diaphragm assembly 32 is sandwiched between an end of the side wall 112 away from the inner bending portion 113 and the second housing 12, wherein the sound emitting hole 111 is disposed in the side wall 112 or the inner bending portion 113.

In the present embodiment, as shown in fig. 3 to 5, by arranging the first housing 11 with the side wall 112 and the inner bending portion 113 disposed at an angle, the mounting and fixing of the first diaphragm assembly 31 and the diaphragm 34 are achieved by the inner bending portion 113 of the first housing 11, while the outer peripheral edges of the second diaphragm assembly 32 and the centering support 36, that is, the outer peripheral edge of the ring-folded portion 321 of the second diaphragm assembly 32 and the outer fixing portion 361 of the centering support 36 are clamped between the end of the side wall 112 away from the inner bending portion 113 and the second housing 12 by the side wall 112 of the first housing 11 and the second housing 12 in cooperation.

It is understood that the outer fixing portion 361 of the centering support 36 is located between the outer periphery of the ring portion 321 of the second diaphragm assembly 32 and the second housing 12, and the other end of the second housing 12 is connected to the magnetic yoke 21. In the present embodiment, the inner bending portion 113 of the first housing 11 is formed by bending and extending an end of the side wall 112 away from the second housing 12 towards the inner side, that is, the inner bending portion 113 of the first housing 11 and the side wall 112 are integrally formed, so that the structural strength of the first housing 11 can be ensured, which is not limited herein.

In order to further increase the contact area between the first diaphragm assembly 31 and the first housing 11 and improve the connection stability and waterproof tightness, the outer periphery of the outer fold ring 313 of the first diaphragm assembly 31 is folded and extended to form a third fold 3131, and the third fold 3131 is connected with the outer wall surface of the side wall 112 of the first housing 11.

In the present embodiment, the outer bending ring 313 of the first diaphragm assembly 31 is fixed to the inner bending portion 113 of the first housing 11, so that the first diaphragm assembly 31 is adhesively fixed to the maximum outer shape of the casing 1, and thus the product outer shape size can be used to increase the effective vibration area of the product. Meanwhile, the magnetic yoke 21 of the magnetic circuit system 2 is fixed on the second shell 12, and the outer periphery of the second diaphragm assembly 32 is clamped between the first shell 11 and the second shell 12, so that the height of the shell 1 can be correspondingly adjusted to be increased or decreased according to the requirement of the product amplitude, and the sounding cavity 4 between the diaphragm 34 and the second diaphragm assembly 32 is adapted to the requirements of different products.

Optionally, the sound outlet 111 is disposed on the side wall 112 or the inner bending portion 113, which is not limited herein.

In one embodiment, as shown in fig. 4 and 5, the inner bending portion 113 includes an upper surface, a lower surface, and an inner side surface, the upper surface and the lower surface are disposed away from each other, and the inner side surface is connected to the upper surface and the lower surface and is located at an end of the inner bending portion 113 away from the side wall 112.

In this embodiment, as shown in fig. 4 and 5, the outer periphery of the outer fold ring 313 is connected to the upper surface, and the outer periphery of the diaphragm 34 is connected to the lower surface. By the arrangement, the first diaphragm assembly 31 and the diaphragm 34 can be fixed, and the distance between the first diaphragm assembly 31 and the diaphragm 34 can be ensured, so that the problems of interference and the like in the vibration process are avoided.

Of course, in other embodiments, the outer periphery of the outer fold ring 313 of the first diaphragm assembly 31 is connected to the upper surface, and the outer periphery of the diaphragm 34 is connected to the inner side surface, or the outer periphery of the outer fold ring 313 is connected to the upper surface, and the outer periphery of the diaphragm 34 is sandwiched between the outer periphery of the outer fold ring 313 and the upper surface, or the outer periphery of the outer fold ring 313 is connected to the inner side surface, and the outer periphery of the diaphragm 34 is connected to the lower surface, or the outer peripheries of the outer fold ring 313 and the diaphragm 34 are both connected to the inner side surface, which is not limited herein.

It is understood that the outer connection portion 341 of the diaphragm 34 may be connected to the lower surface or the inner side surface or the upper surface of the inner bent portion 113, etc., which is not limited herein. In the present embodiment, when the outer connecting portion 341 of the diaphragm 34 and the outer periphery of the outer bending portion 313 are simultaneously connected to the upper surface of the inner bending portion 113, the outer connecting portion 341 of the diaphragm 34 is located between the outer periphery of the outer bending portion 313 and the upper surface of the inner bending portion 113, which is not limited herein.

In one embodiment, the central magnetic portion 22 includes a first central magnet 221, a central magnetic conductive plate 222, and a second central magnet 223 that are stacked, the first central magnet 221 is connected to the magnetic yoke 21, and the inner side of the inner fold ring 311 is connected to the second central magnet 223.

In the present embodiment, as shown in fig. 3 to 5 and 9, the center magnetic portion 22 is provided in a magnetic structure such that the first center magnet 221, the center magnetically permeable plate 222, and the second center magnet 223 are sequentially stacked on the magnetic yoke 21 in the vertical direction. It can be appreciated that the first central magnet 221 and the second central magnet 223 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the first central magnet 221 is opposite to that of the second central magnet 223, so that the magnetic induction lines of the first central magnet 221 and the second central magnet 223 are collected on the central magnetic conductive plate 222 by using the magnetic conduction effect of the central magnetic conductive plate 222 and transferred to the magnetic gap 24 by the central magnetic conductive plate 222, so that the magnetic field with stronger magnetic field strength is generated by the central magnetic part 22 to pass 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 33, increasing the magnetic field force applied to the voice coil 33, and effectively improving the BL value.

Alternatively, the first center magnet 221 is a unitary plate-like structure. In this embodiment, as shown in fig. 3 to 5 and 9, by arranging the first center magnet 221 as an integral plate structure, the processing, assembling and magnetizing of the first center magnet 221 are facilitated, and the production and assembly efficiency is effectively improved.

Of course, in other embodiments, the first center magnets 221 include a plurality of first center magnets 221, and the plurality of first center magnets 221 are adjacent to each other and are tiled between the central magnetically permeable plate 222 and the magnetically permeable yoke 21, and the plurality of first center magnets 221 are magnetized along the vibration direction of the vibration system 3, and the magnetizing directions of the plurality of first center magnets 221 are the same. Alternatively, the magnetic poles of the plurality of first center magnets 221 on the side close to the center magnetically permeable plate 222 are all the same.

Alternatively, the central magnetic conductive plate 222 of the central magnetic portion 22 may be an integral square plate structure and located between the first central magnet 221 and the second central magnet 223, or the central magnetic conductive plate 222 includes a plurality of central magnetic conductive plates 222 that are adjacent and arranged in parallel between the first central magnet 221 and the second central magnet 223, so that the plurality of central magnetic conductive plates 222 cooperate to form a square plate structure, which is not limited herein.

Alternatively, the second center magnet 223 is a unitary plate-like structure. In this embodiment, as shown in fig. 3 to 5 and 9, by arranging the second center magnet 223 as an integral plate structure, the processing, assembling and magnetizing of the second center magnet 223 are facilitated, and the production and assembly efficiency is effectively improved.

Of course, in other embodiments, the second center magnets 223 include a plurality of second center magnets 223, and the second center magnets 223 are adjacent to each other and are tiled on a side of the center magnetic conductive plate 222 facing away from the first center magnets 221, and the plurality of second center magnets 223 are magnetized along the vibration direction of the vibration system 3, and the magnetizing directions of the plurality of second center magnets 223 are the same. Alternatively, the magnetic poles of the plurality of second center magnets 223 on the side near the center magnetically permeable plate 222 are all the same.

In the present embodiment, the inner side of the inner folded ring 311 of the first diaphragm assembly 31 is connected to the second center magnet 223. In order to avoid interference of the second center magnet 223 with the inner fold ring 311 when the inner fold ring 311 vibrates, in an embodiment, as shown in fig. 4 and 5, an edge of the second center magnet 223 is provided with a avoiding structure.

In this embodiment, the avoidance structure is disposed around the periphery of the second center magnet 223 on the side facing away from the center magnetic conductive plate 222, that is, the avoidance structure is an integral annular inclined plane. Of course, in other embodiments, the avoidance structures include a plurality of avoidance structures, and the plurality of avoidance structures are arranged at intervals and surround the periphery of the side of the second central magnet 223, which is opposite to the central magnetic conductive plate 222, so that two adjacent avoidance structures are not connected, and have a certain interval. Or the avoidance structures comprise a plurality of adjacent avoidance structures which are connected end to form a closed annular structure and encircle the periphery of one side of the second central magnet 223, which is opposite to the central magnetic conduction plate 222, at the moment, the adjacent avoidance structures in the plurality of avoidance structures are adjacent and form an annular structure. Optionally, the included angles formed by the avoidance structures and the surface of the second central magnet 223 facing away from the central magnetic conductive plate 222 may be the same, may be different, or may be at least partially the same, and is not limited herein.

Optionally, the avoidance structure may be at least one of an inclined slope, a rounded corner, a chamfer, a step structure.

In one embodiment, the included angle formed by the avoidance structure and the surface of the second central magnet 223 on the side facing away from the central magnetic conductive plate 222 is greater than 90 ° and less than 180 °. In this embodiment, the range of the included angle formed between the avoidance structure and the surface of the second central magnet 223 facing away from the central magnetic conductive plate 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.

In one embodiment, the side magnet 23 includes a side magnet 231 and a side magnetic plate 232 that are stacked, the side magnet 231 is connected to the magnetic yoke 21, the side magnetic plate 232 is disposed opposite to the center magnetic plate 222, the side magnet 231 is magnetized in the vibration direction of the vibration system 3, and the magnetizing direction of the side magnet 231 is opposite to the magnetizing direction of the first center magnet 221.

As shown in fig. 3 to 5 and 9, the side magnet 231 and the side magnetic plate 232 of the side magnetic portion 23 are laminated on the magnetic yoke 21, and the side magnet 231 is connected to the magnetic yoke 21. The side magnet 231 and the side magnetic conductive plate 232 of the side magnetic portion 23 are located outside the center magnetic portion 22 and are spaced apart to form the magnetic gap 24. In this embodiment, the side magnet 231 may be a permanent magnet, and the side magnetic plate 232 may be a magnetic plate structure, which is not limited herein.

In the present embodiment, 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 center magnetic portion 22 and are surrounded by the center magnetic portion 22 at intervals to form a magnetic gap 24. At this time, the avoiding space 233 is formed between the adjacent side magnetic portions 23 at intervals, so that the rigid connector 35 and the inner fixing portion 362 of the centering support are provided with the installation avoiding space and the moving space by the avoiding space 233. Alternatively, the side magnets 231 and the side magnetic plates 232 are plural and are arranged in one-to-one correspondence.

As shown in fig. 16 and 17, the present invention further provides a sounding module 600, where the sounding module 600 includes the sounding device 100, and the specific structure of the sounding device 100 refers to the foregoing embodiment, and since the sounding module 600 adopts all the technical solutions of all the foregoing embodiments, at least the sounding module has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be described in detail herein.

In an embodiment, the sounding module 600 further includes a module housing 500, the module housing 500 is provided with a mounting cavity 510 and a sound outlet 520 communicated with the mounting cavity 510, the sounding device 100 is provided in the mounting cavity 510, a front sound cavity 530 is formed between the first diaphragm assembly 31 of the sounding device 100 and the module housing 500, the front sound cavity 530 is communicated with the sound outlet 520, wherein the sound emitting cavity 4 of the sounding device 100 is communicated with the sound outlet 520 through the front sound cavity 530, or the module housing 500 is further provided with a sound outlet channel, the sound emitting cavity 4 of the sounding device 100 is communicated with the sound outlet 520 through the sound outlet channel, or the sound outlet 111 of the sounding device 100 is directly communicated with the sound outlet 520.

In this embodiment, the sounding module 600 may be a positive sounding structure or a side sounding structure. When the sounding module 600 is in a positive sounding structure, the sound outlet 520 of the module housing 500 is disposed opposite to the first diaphragm assembly 31 of the sounding device 100. It can be understood that the sound outlet 111 on the housing 1 of the sound generating device 100 is disposed on the inner bending portion 113 of the first housing 11, and the sound outlet 111 is disposed opposite to the sound outlet 520 of the module housing 500, where the sound outlet 111 communicates with the front sound cavity 530, or the sound outlet 111 communicates with the sound outlet 520 through the sound outlet channel of the module housing 500, which is not limited herein.

Of course, the sound outlet 111 on the housing 1 may be disposed on the side wall 112 of the first housing 11, and the sound outlet 111 communicates with the sound outlet 520 through the sound outlet channel of the module housing 500, which is not limited herein.

It can be appreciated that, when the sounding module 600 is in a side sounding structure, the sound outlet 520 of the module housing 500 is located at one side of the first diaphragm assembly 31 of the sounding device 100. It can be understood that the sound outlet 111 on the housing 1 of the sound generating device 100 is disposed on the inner bending portion 113 of the first housing 11, and the sound outlet 111 can be communicated with the sound outlet 520 through the sound outlet channel of the module housing 500, which is not limited herein.

Of course, the sound outlet 111 on the housing 1 may be disposed on the side wall 112 of the first housing 11, where the sound outlet 111 communicates with the sound outlet 520 through the sound outlet channel of the module housing 500, or the sound outlet 111 and the sound outlet 520 of the module housing 500 are disposed in opposite communication, which is not limited herein.

In one embodiment, the sounding module 600 further includes a flexible circuit board, one end of which is electrically connected to the centering pad 36 of the sounding 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 outer bonding pad 365 of the centering support 36 of 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 module housing 500 has a mounting cavity 510, the sound generating device 100 is disposed in the mounting cavity 510 of the module housing 500, and at least one end of the flexible circuit board connected to the sound generating device 100 is disposed in the mounting cavity 510 of the module housing 500. Of course, in other embodiments, the flexible circuit board may be disposed entirely within the mounting cavity 510 of the module housing 500, which is not limited herein.

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 this embodiment, the electronic device further includes a device housing, and the sound generating apparatus 100 and the flexible circuit board are disposed in the device housing. It is understood that the electronic device may be a headset, a mobile phone, a smart wearable device, etc., without limitation.

The invention also provides an electronic device, which comprises the sounding module 600. The specific structure of the sounding module 600 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least the sound generating module has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein.

It is understood that the electronic device may be a headset, a mobile phone, a smart wearable device, etc., without limitation. In this embodiment, the electronic device further includes a device housing, and the sounding module 600 is disposed in the device housing.

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-generating device, characterized in that the sound-generating device comprises:

A housing, wherein the housing is provided with a sound outlet hole;

A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, the side magnetic portion is located outside the central magnetic portion and forms a magnetic gap with the central magnetic portion, the central magnetic portion includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, the first central magnet is connected to the magnetic yoke, the side magnetic portion includes a plurality of side magnetic portions, and an escape space is formed between two adjacent side magnetic portions; and

A vibration system, the vibration system comprising a first diaphragm assembly, a second diaphragm assembly, a voice coil, a diaphragm and a rigid connector, the first diaphragm assembly comprising an inner folding ring, a first vibration plate and an outer folding ring connected in sequence, the inner side of the inner folding ring being connected to the second central magnet, the outer periphery of the outer folding ring being connected to the housing, one end of the voice coil being connected to the first diaphragm assembly, the other end of the voice coil being suspended in the magnetic gap, the diaphragm and the second diaphragm assembly being arranged in sequence on the side of the first diaphragm assembly facing the magnetic yoke and being located on the outside of the voice coil, the outer edges of the diaphragm and the second diaphragm assembly being connected to the housing, the inner edge of the diaphragm being connected to the inner edge of the second diaphragm assembly, so as to form a sound cavity connected to the sound outlet between the diaphragm and the second diaphragm assembly, the second diaphragm assembly having a first extension portion extending to the avoidance space, the diaphragm having a second extension portion extending to the avoidance space, the second extension portion being correspondingly connected to the first extension portion;

Wherein, the first center magnet and the second center magnet are both magnetized along the vibration direction of the vibration system and the magnetization directions are opposite, the rigid connecting member is arranged in the avoidance space, and the rigid connecting member includes a rigid connecting portion and a fourth extending portion extending from the rigid connecting portion toward the voice coil, the rigid connecting portion is connected to the first extending portion, and the fourth extending portion is connected to the voice coil.

2. The sound-generating device according to claim 1, characterized in that the second diaphragm assembly comprises a folding ring portion and a second vibration plate, the outer periphery of the folding ring portion is connected to the housing, the second vibration plate comprises a main body portion connected to the inner edge of the folding ring portion and a first bending portion formed by the main body portion bending and extending toward the diaphragm, and the first bending portion is connected to the inner edge of the diaphragm;

Wherein, a side of the main body away from the folding ring portion extends toward the avoidance space to form the first extension portion.

3. The sound-generating device according to claim 2, characterized in that an inclined portion is formed at the connection between the main body and the first bending portion, and the inclined portion is arranged at an angle with the vibration direction of the vibration system;

And/or, the outer periphery of the folded ring portion is bent to form a first flange, and the first flange is connected to the outer wall of the shell.

4. The sound-generating device according to claim 2, characterized in that the diaphragm is a flexible member, the diaphragm comprises an outer connecting portion, a deformable portion and an inner connecting portion connected in sequence, the outer periphery of the outer connecting portion is connected to the outer shell, the inner edge of the inner connecting portion is connected to the first bending portion, and the deformable portion is in a bending shape;

Wherein, the inner connecting portion corresponds to the first extending portion and extends toward the avoidance space to form the second extending portion.

5. The sound-generating device according to claim 4, characterized in that the inner edge of the inner connecting portion is bent and extended toward the first bending portion to form a second flange, and the second flange is connected to the first bending portion;

And/or, along the vibration direction of the vibration system, the projection width L1 of the deformation portion is greater than or equal to the projection width L2 of the folding ring portion, and the ratio of L1 to L2 is 1:1 to 3:1;

And/or, the deformation portion protrudes in a direction away from the first diaphragm assembly, the folding ring portion protrudes in a direction close to the first diaphragm assembly, and the deformation portion and the folding ring portion are staggered in a direction perpendicular to the vibration system;

And/or, the inner fold ring and the outer fold ring both protrude in a direction away from the magnetic circuit system;

And/or, the compliance of the diaphragm is greater than the compliance of the folding ring portion.

6 . The sound-generating device according to claim 1 , wherein an effective vibration area Sd1 of the diaphragm is smaller than an effective vibration area Sd2 of the second diaphragm assembly, and a ratio of Sd1 to Sd2 is 1:1.5 to 1:3.

7. The sound-generating device according to claim 1, characterized in that the vibration system further comprises a centering support, the centering support comprises an external fixing portion, an internal fixing portion and a vibration arm connecting the external fixing portion and the internal fixing portion, the external fixing portion is connected to the housing, and the rigid connecting member is arranged on the internal fixing portion;

The second diaphragm assembly comprises a folding ring portion and a second vibration plate connected to each other, the outer periphery of the folding ring portion is connected to the housing, and the inner edge of the second vibration plate is connected to the inner edge of the diaphragm;

The inner fixing portion is connected to the second vibration plate and the voice coil, and is electrically connected to the lead wire of the voice coil.

8. The sound-emitting device as described in claim 1 is characterized in that the outer shell includes a first shell and a second shell, the first shell is provided with the sound outlet hole, the outer periphery of the outer folding ring and the outer periphery of the diaphragm are connected to the first shell, the magnetic yoke is connected to the second shell, and the outer periphery of the second diaphragm assembly is clamped between the first shell and the second shell.

9. The sound-generating device as described in any one of claims 1 to 8 is characterized in that the side magnetic part includes stacked side magnets and side magnetic conductive plates, the side magnets are connected to the magnetic conductive yoke, the side magnetic conductive plates are arranged opposite to the center magnetic conductive plate, and the magnetizing direction of the side magnets is opposite to the magnetizing direction of the first center magnet.

10. A sound module, characterized in that the sound module comprises:

A module housing, wherein the module housing is provided with a mounting cavity and a sound outlet communicating with the mounting cavity; and

The sound-generating device according to any one of claims 1 to 9, wherein the sound-generating device is disposed in the installation cavity, a front sound cavity is formed between the first diaphragm assembly of the sound-generating device and the module housing, and the front sound cavity is connected to the sound outlet;

Among them, the sound cavity of the sound-emitting device is connected with the sound outlet through the front sound cavity; or, the module shell is also provided with a sound outlet channel, and the sound cavity of the sound-emitting device is connected with the sound outlet through the sound outlet channel; or, the sound outlet hole of the sound-emitting device is connected directly with the sound outlet.