Sound production unit and sound production module

Abstract

The present invention relates to the technical field of electroacoustics. Disclosed are a sound production unit and a sound production module. The sound production unit comprises a housing, a magnetic circuit unit, and a vibration unit, wherein the magnetic circuit unit is accommodated in the housing and comprises a first magnetic assembly and a second magnetic assembly spaced apart in a first direction; the vibration unit is located between the first magnetic assembly and the second magnetic assembly and comprises a diaphragm and a voice coil connected to the diaphragm; the diaphragm comprises a vibrating plate and a surround disposed around the vibrating plate; the voice coil comprises a first voice coil portion and a second voice coil portion located on both sides of the vibrating plate in the first direction; the first voice coil portion is located in a first magnetic gap of the first magnetic assembly, and the second voice coil portion is located in a second magnetic gap of the second magnetic assembly; the first voice coil portion and the second voice coil portion are formed by winding the same wire; and the vibrating plate comprises an inner vibrating plate connected to an inner wall of the voice coil and an outer vibrating plate connected to an outer wall of the voice coil. The sound production unit of the present invention has high sensitivity, good mid-frequency performance, and a low distortion risk.

Description

Sound-emitting monomer and sound-emitting module TECHNICAL FIELD

[0001] The present application relates to the technical field of electroacoustics, in particular to a sound-emitting monomer and a sound-emitting module. BACKGROUND

[0002] With the improvement of people's living standards, intelligent electronic devices are more and more favored by users. At present, the development trend of intelligent electronic devices is light and thin, but at the same time, the acoustic performance requirements of electronic devices with sound-emitting needs, such as loudspeaker products, are also getting higher and higher. In the existing loudspeaker products, the effective vibration area of the loudspeaker monomer is often limited, the sensitivity is poor, and the product mid-frequency performance is affected, resulting in poor mid-frequency performance. And because the magnetic circuit unit in the loudspeaker monomer is often located on one side of the vibration unit, the magnetic field distribution of the voice coil vibration area is uneven, and the distortion risk is high. SUMMARY

[0003] The main purpose of the present application is to provide a sound-emitting monomer and a sound-emitting module, which aims to solve the technical problems of poor sensitivity, poor mid-frequency performance and high distortion risk of the loudspeaker product in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides a sound-emitting monomer, which comprises:

[0005] A shell having a containing space and a sound outlet communicating with the containing space;

[0006] A magnetic circuit unit accommodated in the containing space, the magnetic circuit unit comprising a first magnetic assembly and a second magnetic assembly spaced apart along a first direction, the first magnetic assembly having a first magnetic gap, the second magnetic assembly having a second magnetic gap, the first magnetic gap and the second magnetic gap being oppositely arranged along the first direction;

[0007] A vibration unit located between the first magnetic assembly and the second magnetic assembly, the vibration unit comprising a diaphragm and a voice coil connected to the diaphragm, the diaphragm comprising a vibration plate and a folded ring arranged around the vibration plate, the voice coil comprising a first voice coil portion and a second voice coil portion located on both sides of the vibration plate along the first direction, the first voice coil portion being located in the first magnetic gap, and the second voice coil portion being located in the second magnetic gap; wherein

[0008] The first voice coil portion and the second voice coil portion are wound from the same wire, and the vibration plate comprises an inner vibration plate connected to the inner wall of the voice coil and an outer vibration plate connected to the outer wall of the voice coil.

[0009] In an embodiment, the folded ring comprises a plurality of bending portions arranged along the first direction and connected in sequence, the ends of the two bending portions located at the outermost sides along the first direction form a first end and a second end respectively, the first end is connected to the side of the vibrating plate facing the first magnetic assembly, and the second end is connected to the side of the second magnetic assembly facing the vibrating plate, and the sound waves on the side of the vibrating plate facing the first magnetic assembly are radiated to the outside through the sound outlet.

[0010] In an embodiment, the first end is connected to the side of the vibrating plate facing the second magnetic assembly, and the second end is arranged around the second magnetic assembly.

[0011] And / or, the profile size of the second end projected along the first direction is greater than the profile size of the first end projected along the first direction.

[0012] And / or, the profile of the outer edge of the vibrating plate projected along the first direction is located outside the profile of the second magnetic assembly projected along the first direction.

[0013] And / or, the profile of the outer edge of the vibrating plate projected along the first direction is located outside the profile of the first magnetic assembly projected along the first direction.

[0014] And / or, the vibrating plate is bent and extended to form a slope structure near the outer edge thereof in the direction close to the first magnetic assembly, and the first magnetic assembly is provided with a avoiding portion for avoiding the slope structure.

[0015] In an embodiment, the folded ring comprises a first connecting portion, a deformation portion and a second connecting portion connected in sequence, the arrangement direction of the first connecting portion, the deformation portion and the second connecting portion is perpendicular to the first direction, the first connecting portion is connected to the vibrating plate, and the second connecting portion is connected to the shell.

[0016] In an embodiment, the first magnetic assembly comprises a first inner magnet and a first outer magnet arranged around the first inner magnet, the first inner magnet and the first outer magnet are spaced apart and form the first magnetic gap therebetween, the second magnetic assembly comprises a second inner magnet and a second outer magnet arranged around the second inner magnet, the second inner magnet and the second outer magnet are spaced apart and form the second magnetic gap therebetween.

[0017] In an embodiment, the magnetization directions of the first inner magnet and the second inner magnet are opposite, the magnetization directions of the first outer magnet and the second outer magnet are opposite, and the magnetization directions of the first inner magnet and the first outer magnet are opposite.

[0018] And / or, the first magnetic gap and the second magnetic gap are arranged in alignment along the first direction.

[0019] And / or, the first outer magnet is a ring magnet.

[0020] And / or, the first inner magnet is arranged opposite to the second inner magnet, and the first outer magnet is arranged opposite to the second outer magnet.

[0021] In an embodiment, the sound emitting unit further comprises a centering support, the centering support is arranged at an end of the second voice coil part away from the diaphragm, the centering support comprises an inner fixing part, an elastic arm part and an outer fixing part connected in sequence, the inner fixing part is connected with the second voice coil part, the outer fixing part is connected with the shell, the elastic arm part connects the inner fixing part and the outer fixing part, the second magnetic assembly comprises a plurality of second outer magnets, the plurality of second outer magnets are arranged at intervals along the circumference of the second inner magnet, and an avoiding space for avoiding the elastic arm part is formed between any two adjacent second outer magnets.

[0022] One side of the second voice coil part is connected with an external circuit, or the centering support is an electrically conductive centering support, and the second voice coil part is connected with an external circuit through the centering support.

[0023] In an embodiment, the shell comprises a first shell and a second shell, the first shell and the second shell enclose the containing space, the first magnetic assembly is arranged in the first shell, the second magnetic assembly is arranged in the second shell, and the first shell is provided with the sound outlet.

[0024] In an embodiment, the first shell comprises a bottom wall and a side wall connected around the outer edge of the bottom wall, the side wall is provided with the sound outlet, the second shell is arranged at an end of the side wall away from the bottom wall, a plastic support is arranged on the side of the second shell facing the containing space, the plastic support surrounds the second magnetic assembly, and the folding ring is connected to the plastic support; or the second shell comprises a top wall and a side wall, the side wall is provided with the sound outlet, the first shell is arranged at an end of the side wall away from the top wall, a plastic support is arranged on the side of the top wall facing the containing space, the plastic support surrounds the second magnetic assembly, and the second connecting end is connected to the plastic support.

[0025] The plastic support and the second shell or the first shell are integrally injection molded, and / or the plastic support is embedded with an electrically conductive part.

[0026] The plastic support and the second shell are integrally injection molded, and / or the plastic support is embedded with an electrically conductive part.

[0027] In an embodiment, the first shell is made of metal.

[0028] And / or, the second shell is made of metal.

[0029] And / or, the second shell is made of magnetic material;

[0030] And / or, the second shell is provided with a leakage hole communicating the accommodating space with the external environment and a isolation net covering the leakage hole.

[0031] In an embodiment, the inner vibrating plate has a magnetic conductive part.

[0032] In an embodiment, the inner vibrating plate is a magnetic conductive plate member to form the magnetic conductive part.

[0033] Alternatively, a magnetic conductive member is embedded in the inner vibrating plate to form the magnetic conductive part.

[0034] Alternatively, a magnetic conductive member is arranged on at least one side of the inner vibrating plate along the first direction to form the magnetic conductive part.

[0035] Alternatively, a magnetic conductive material is coated on at least one side surface of the inner vibrating plate along the first direction to form the magnetic conductive part.

[0036] The present application also provides a sound production module, which comprises a shell and the sound production unit as described above, and the shell has an accommodating cavity, and the sound production unit is accommodated in the accommodating cavity.

[0037] In the sound production unit, the magnetic circuit unit comprises a first magnetic assembly and a second magnetic assembly arranged at intervals along a first direction, and has a first magnetic gap and a second magnetic gap respectively, the vibration unit is located between the first magnetic assembly and the second magnetic assembly, and the voice coil of the diaphragm unit comprises a first voice coil part located in the first magnetic gap and a second voice coil part located in the second magnetic gap, which realizes the symmetrical design of the two sides of the magnetic circuit unit and the vibration unit of the sound production unit, makes the magnetic field distribution of the voice coil vibration area uniform, can provide a larger and slowly flat driving force for the voice coil with displacement change, reduces the risk of distortion, and at the same time, the first voice coil part and the second voice coil part are formed by winding the same wire, which is convenient for winding and assembling the voice coil, and is convenient for electrical connection of the voice coil and the external circuit. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0039] Fig. 1 is an assembly schematic view of a sound production unit according to an embodiment of the present application;

[0040] Fig. 2 is a cross-sectional schematic view of a sound production unit according to an embodiment of the present application;

[0041] Fig. 3 is an exploded view of a sound emitting unit according to an embodiment of the present application;

[0042] Fig. 4 is another exploded view of a sound emitting unit according to an embodiment of the present application;

[0043] Fig. 5 is a diagram of magnetic field distribution of a sound emitting unit according to an embodiment of the present application;

[0044] Fig. 6 is a diagram of BL(x) curve of a sound emitting unit according to an embodiment of the present application;

[0045] Fig. 7 is a diagram of magnetizing direction of a sound emitting unit according to an embodiment of the present application;

[0046] Fig. 8 is an exploded view of a sound emitting unit according to another embodiment of the present application;

[0047] Fig. 9 is a diagram of structure of a sound emitting unit according to an embodiment of the present application, in which a magnetic conducting member is embedded in the inner vibrating plate;

[0048] Fig. 10 is a diagram of structure of a sound emitting unit according to an embodiment of the present application, in which a magnetic conducting member is arranged on the lower side of the inner vibrating plate;

[0049] Fig. 11 is a diagram of structure of a sound emitting unit according to an embodiment of the present application, in which a magnetic conducting member is arranged on the upper side of the inner vibrating plate;

[0050] Fig. 12 is a sectional view of a sound emitting module according to an embodiment of the present application;

[0051] Fig. 13 is an exploded view of the sound emitting module of Fig. 12;

[0052] Fig. 14 is a sectional view of a sound emitting module according to another embodiment of the present application;

[0053] Fig. 15 is an exploded view of the sound emitting module of Fig. 14;

[0054] Fig. 16 is a sectional view of a sound emitting unit according to another embodiment of the present application.

[0055] Explanation of reference numerals:

[0056] 100, sound production monomer; 10, shell; 11, containing space; 12, first shell; 121, bottom wall; 13, second shell; 131, top wall; 14, side wall; 15, plastic support; 151, conductive part; 16, sound outlet; 17, leakage hole; 18, isolation net; 20, magnetic circuit unit; 21, first magnetic assembly; 211, first magnetic gap; 212, first inner magnet; 213, first outer magnet; 214, avoidance part; 22, second magnetic assembly; 221, second magnetic gap; 222, second inner magnet; 223, second outer magnet; 224, avoidance space; 30, vibration unit; 31, diaphragm; 311, vibration plate; 3111, inner vibration plate; 3112, outer vibration plate; 3113, magnetic conductive part; 3114, slope structure; 312, folded ring; 3121, first end; 3122, second end; 3123, bending part; 3124, first extension part; 3125, second extension part; 32, voice coil; 321, first voice coil part; 322, second voice coil part; 40, centering support piece; 41, inner fixing part; 42, elastic arm part; 43, outer fixing part; 200, sound production module; 50, shell; 51, containing cavity; 511, front cavity; 512, rear cavity; 52, first shell; 53, second shell; 54, sound outlet; 55, support wall; 56, opening; 57, filling port; 58, damping part.

[0057] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present application.

[0059] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0060] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0061] With the improvement of people's living standards, intelligent electronic devices are more and more favored by users. At present, intelligent electronic devices develop towards light and thin trend, but at the same time, the acoustic performance requirements of electronic devices with sound demand, such as loudspeaker products, are also getting higher and higher. In the existing loudspeaker products, the effective vibration area of the loudspeaker monomer is often limited, the sensitivity is poor, and the product mid-frequency performance is affected, resulting in poor mid-frequency performance. And because the magnetic circuit unit in the loudspeaker monomer is often located on one side of the vibration unit, the magnetic field distribution of the voice coil vibration area is uneven, and the distortion risk is high.

[0062] In view of this, it is necessary to propose a sound emitting monomer and a sound emitting module to solve or at least alleviate the above technical problems.

[0063] As shown in FIGS. 1-4, the present application proposes a sound emitting monomer 100, which comprises a shell 10, a magnetic circuit unit 20 and a vibration unit 30, wherein the shell 10 has a containing space 11 and a sound outlet 16 communicating with the containing space 11, the magnetic circuit unit 20 is accommodated in the containing space 11, the magnetic circuit unit 20 comprises a first magnetic assembly 21 and a second magnetic assembly 22 which are arranged at intervals along a first direction, the first magnetic assembly 21 has a first magnetic gap 211, and the second magnetic assembly 22 has a second magnetic gap 221; the vibration unit 30 is located between the first magnetic assembly 21 and the second magnetic assembly 22, the sound wave of the vibration unit 30 is radiated to the outside through the sound outlet 16, the vibration unit 30 comprises a diaphragm 31 and a voice coil 32 connected with the diaphragm 31, the diaphragm 31 comprises a vibration plate 311 and a folded ring 312 arranged around the vibration plate 311, the voice coil 32 comprises a first voice coil part 321 and a second voice coil part 322 located on both sides of the vibration plate 311 along the first direction, the first voice coil part 321 is located in the first magnetic gap 211, and the second voice coil part 322 is located in the second magnetic gap 221; wherein the first voice coil part 321 and the second voice coil part 322 are wound by the same wire, and the vibration plate 311 comprises an inner vibration plate 3111 connected with the inner wall of the voice coil 32 and an outer vibration plate 3112 connected with the outer wall of the voice coil 32.

[0064] The sound production unit 100 can be a micro speaker unit, and the sound production unit 100 can be applied to a sound production module 200 of an electronic device, and the electronic device can be a computer, a mobile phone, a smart wearable device, etc. The embodiment takes the sound production unit 100 as a micro speaker unit as an example for description.

[0065] The first direction is a vertical direction shown in FIG. 2, and the vertical direction is an up-down direction. The second direction is a horizontal direction shown in FIG. 2, and the horizontal direction is a left-right direction. The first direction and the second direction are perpendicular.

[0066] In an embodiment, the magnetic circuit unit 20 and the vibration unit 30 are both accommodated in the accommodating space 11 of the housing 10, and the structure is compact. The magnetic circuit unit 20 includes a first magnetic assembly 21 and a second magnetic assembly 22, the first magnetic assembly 21 and the second magnetic assembly 22 are arranged in an up-down interval, and the vibration unit 30 is located between the first magnetic assembly 21 and the second magnetic assembly 22, that is, the vibration unit 30 has the first magnetic assembly 21 and the second magnetic assembly 22 on the upper and lower sides, respectively. The first magnetic assembly 21 and the second magnetic assembly 22 provide driving force for the voice coil 32, so that the voice coil 32 vibrates along the first direction, and in turn drives the diaphragm 31 to vibrate along the first direction, to realize vibration sound production.

[0067] As shown in FIGS. 2 to 5, in the sound production unit 100, the magnetic circuit unit 20 includes the first magnetic assembly 21 and the second magnetic assembly 22 arranged on the upper and lower sides of the vibration unit 30, and the voice coil 32 includes the first voice coil part 321 located in the first magnetic gap 211 and the second voice coil part 322 located in the second magnetic gap 221, which realizes the design of the two sides of the magnetic circuit unit 20 and the vibration unit 30 of the sound production unit 100 being symmetrical, so that the magnetic field distribution of the voice coil 32 vibration area is uniform, and a larger and slowly flat driving force varying with displacement can be provided for the voice coil 32, as shown in the BL(x) curve in FIG. 6, the BL curve is completely symmetrical on the left and right, and the BL at the Xmax position (the maximum displacement of the voice coil 32) is attenuated within 10% compared with the equilibrium position, thereby realizing the super-linear BL(x) design and reducing the risk of distortion. It can be understood that the horizontal axis in FIG. 6 represents displacement, with units of mm, and the vertical axis represents BL, with units of Wb / m. At the same time, the first voice coil part 321 and the second voice coil part 322 are formed by winding the same wire, which facilitates the winding and assembly of the voice coil 32, and facilitates the electrical connection between the voice coil 32 and the external circuit.

[0068] As shown in FIG. 7, in an embodiment, the first voice coil portion 321 and the second voice coil portion 322 are wound by the same wire, and the vibrating plate 311 includes an inner vibrating plate 3111 connected with the inner wall of the voice coil 32 and an outer vibrating plate 3112 connected with the outer wall of the voice coil 32. In this embodiment, the first voice coil portion 321 and the second voice coil portion 322 are designed in one body and wound by the same wire, i.e., the voice coil 32 is straight-cylindrical and designed as a single voice coil 32. The vibrating plate 311 is separated into the inner vibrating plate 3111 and the outer vibrating plate 3112 by the voice coil 32, wherein the inner vibrating plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibrating plate 3112 is connected with the outer wall of the voice coil 32, so as to realize the assembly of the voice coil 32 and the diaphragm 31.

[0069] In another embodiment, the first voice coil portion 321 and the second voice coil portion 322 are wound by the same wire, the vibrating plate 311 includes an inner vibrating plate 3111 connected with the inner wall of the voice coil 32 and an outer vibrating plate 3112 connected with the outer wall of the voice coil 32, and one side of the second voice coil portion 322 is connected with the external circuit. In this embodiment, the first voice coil portion 321 and the second voice coil portion 322 are designed in one body and wound by the same wire, i.e., the voice coil 32 is designed as a single voice coil 32. The vibrating plate 311 is separated into the inner vibrating plate 3111 and the outer vibrating plate 3112 by the voice coil 32, wherein the inner vibrating plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibrating plate 3112 is connected with the outer wall of the voice coil 32, so as to realize the assembly of the voice coil 32 and the diaphragm 31. Moreover, one side of the second voice coil portion 322 is connected with the external circuit, so as to realize the conduction between the voice coil 32 and the external circuit.

[0070] As shown in FIGS. 2-4 and 7-12, in an embodiment, the two ends of the folded ring 312 along the up-down direction are respectively a first end 3121 and a second end 3122, wherein the first end 3121 is connected with the vibrating plate 311, and the second end 3122 is connected with the shell 10 or the second magnetic assembly 22. The first end 3121 is arranged on the same side of the first magnetic assembly 21, and the second end 3122 is arranged on the same side of the second magnetic assembly 22, so that the folded ring 312 has a certain height in the vertical direction, i.e., the folded ring 312 is a vertical folded ring 312 which has extension in the vertical direction, thereby expanding the size of the vibrating plate 311 in the width direction of the sound emitting unit 100, improving the effective vibrating area (SD) of the sound emitting unit 100, improving the sensitivity of the sound emitting unit 100, and improving the mid-frequency performance of the product, so that the mid-frequency performance of the product is optimized.

[0071] Specifically, the folded ring 312 comprises a plurality of bending portions 3123 connected in sequence along the first direction, each bending portion 3123 is bent towards the second direction, and the bending directions of any two adjacent bending portions 3123 are opposite, so that the folded ring 312 forms a wave-shaped bending structure, and the two bending portions 3123 located at the outermost sides along the first direction form the first end 3121 and the second end 3122 respectively, the vibration plate 311 is connected to the first end 3121, and the second end 3122 is connected to the shell 10 or the second magnetic assembly 22, and the sound waves on the side of the vibration plate 311 facing the first magnetic assembly 21 are radiated to the outside through the sound outlet 16.

[0072] Specifically, the folded ring 312 comprises a plurality of bending portions 3123 connected in sequence along the first direction, each bending portion 3123 is bent towards the second direction, and the bending directions of any two adjacent bending portions 3123 are opposite, so that the folded ring 312 forms a wave-shaped bending structure, and the two bending portions 3123 located at the outermost sides along the first direction form the first end 3121 and the second end 3122 respectively, the vibration plate 311 is connected to the first end 3121, and the second end 3122 is connected to the shell 10 or the second magnetic assembly 22, and the sound waves on the side of the vibration plate 311 facing the first magnetic assembly 21 are radiated to the outside through the sound outlet 16.

[0073] Each bending portion 3123 is an arc-shaped bending portion 3123, and any two adjacent bending portions 3123 are smoothly and continuously connected, which improves the smoothness and continuity of the folded ring 312, avoids stress concentration, and is more conducive to improving the ductility of the folded ring 312.

[0074] As shown in FIG. 2, in an embodiment, the first end 3121 extends along the second direction to form a first extension 3124, and the first extension 3124 is connected to the vibration plate 311 in a stacked manner. The first end 3121 extends along the horizontal direction to form the first extension 3124, and the first extension 3124 is connected to the bottom of the vibration plate 311 in a stacked manner, which improves the assembly stability of the folded ring 312 and the vibration plate 311.

[0075] The second end 3122 extends along the second direction to form a second extension 3125, and the second extension 3125 is connected to the shell 10 or the second magnetic assembly 22 in a stacked manner. The second end 3122 extends along the horizontal direction to form the second extension 3125, and the second extension 3125 is connected to the top of the shell 10 or the top or bottom of the second magnetic assembly 22 in a stacked manner, which improves the assembly stability of the folded ring 312 and the shell 10 or the second magnetic assembly 22.

[0076] In another embodiment, the second end 3122 extends along the second direction and the first direction in sequence to form a second extension 3125, that is, the second end 3122 extends along the horizontal direction first and then extends along the up-down direction to form the second extension 3125, the second extension 3125 is connected with the side of the shell 10, and the assembly stability of the folding ring 312 and the shell 10 is improved.

[0077] The connection mode of the folding ring 312 in the sound production monomer 100 with the shell 10 or the second magnetic assembly 22 can be flexibly selected.

[0078] As shown in FIG. 2, the number of the bending portions 3123 is three, which are a first bending portion, a second bending portion and a third bending portion, the first bending portion, the second bending portion and the third bending portion are connected in sequence along the first direction, one end of the first bending portion away from the second bending portion forms the first end 3121, and one end of the third bending portion away from the second bending portion forms the second end 3122. The folding ring 312 includes three bending portions 3123, and the number of the bending portions 3123 is not too much or too little, so as to realize full extension of the folding ring 312 on the basis of saving the space occupied by the folding ring 312.

[0079] In an embodiment, the folding ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic assembly 22, and the second end 3122 is arranged around the second magnetic assembly 22. As shown in FIG. 2, the folding ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic assembly 22, that is, the folding ring 312 is connected to the lower side of the vibrating plate 311, and the second end 3122 is arranged around the outside of the second magnetic assembly 22, and the structure design is reasonable.

[0080] In an embodiment, the profile size of the second end 3122 projected along the first direction is greater than the profile size of the first end 3121 projected along the first direction, that is, the second end 3122 is projected along the up-down direction, and the profile size of the projection on the horizontal plane is greater than the profile size of the first end 3121 projected on the horizontal plane. The first end 3121 and the second end 3122 are both arranged in a ring shape, and the outer profile size of the second end 3122 is increased relative to the first end 3121, which further improves the extension of the folding ring 312, thereby improving the effective vibration area of the sound production monomer 100, and at the same time, the flexibility of the folding ring 312 is improved.

[0081] In an embodiment, the profile of the outer edge of the vibrating plate 311 projected along the first direction is located outside the profile of the second magnetic assembly 22 projected along the first direction, that is, the profile of the outer edge of the vibrating plate 311 projected on the horizontal plane is located outside the profile of the second magnetic assembly 22 projected on the horizontal plane, so that the size of the vibrating plate 311 is large, and the effective vibration area of the sound production monomer 100 is improved.

[0082] In an embodiment, the outer edge of the vibration plate 311 is projected along the first direction to be located outside the outer edge of the first magnetic assembly 21 projected along the first direction, i.e., the outer edge of the vibration plate 311 is projected on the horizontal plane to be located outside the outer edge of the first magnetic assembly 21 projected on the horizontal plane, so that the size of the vibration plate 311 is larger, and the effective vibration area of the sound production unit 100 is increased.

[0083] In an embodiment, the vibration plate 311 is bent to extend in the direction close to the first magnetic assembly 21 at a position close to the outer edge of the vibration plate 311 to form a slope structure 3114, and the first magnetic assembly 21 is provided with a avoiding part for avoiding the slope structure 3114. As shown in FIG. 2, the vibration plate 311 is bent to extend upward at a position close to the outer edge of the vibration plate 311 to form a slope structure 3114, which facilitates increasing the space for arranging the folded ring 312, and the avoiding part 214 of the first magnetic assembly 21 can avoid the slope structure 3114 to prevent the first magnetic assembly 21 from interfering with the vibration plate 311.

[0084] In an embodiment, as shown in FIG. 16, the folded ring includes a first connecting part, a deformation part and a second connecting part connected in sequence, the arrangement direction of the first connecting part, the deformation part and the second connecting part is perpendicular to the first direction, the first connecting part is connected to the vibration plate, and the second connecting part is connected to the shell. The arrangement form of the folded ring is selected flexibly according to actual needs, which is not limited here.

[0085] In an embodiment, the first magnetic assembly 21 includes a first inner magnet 212 and a first outer magnet 213, the first outer magnet 213 surrounds the first inner magnet 212 and is spaced apart from the first inner magnet 212, a first magnetic gap 211 is formed between the first inner magnet 212 and the first outer magnet 213, and magnetic induction lines can be generated between the first inner magnet 212 and the first outer magnet 213 to pass through the first magnetic gap 211, so that the first voice coil part 321 is vibrated up and down to cut the magnetic induction lines when the first voice coil part 321 is energized. Understandably, the first inner magnet 212 and the first outer magnet 213 are arranged along the second direction.

[0086] The second magnetic assembly 22 includes a second inner magnet 222 and a second outer magnet 223, the second outer magnet 223 surrounds the second inner magnet 222 and is spaced apart from the second inner magnet 222, a second magnetic gap 221 is formed between the second inner magnet 222 and the second outer magnet 223, and magnetic induction lines can be generated between the second inner magnet 222 and the second outer magnet 223 to pass through the second magnetic gap 221, so that the second voice coil part 322 is vibrated up and down to cut the magnetic induction lines when the second voice coil part 322 is energized. Understandably, the second inner magnet 222 and the second outer magnet 223 are arranged along the second direction.

[0087] In an embodiment, as shown in FIG. 7, the first magnetic assembly 21 and the second magnetic assembly 22 are magnetized in the first direction, the first inner magnet 212 and the second inner magnet 222 are magnetized in opposite directions, the first outer magnet 213 and the second outer magnet 223 are magnetized in opposite directions, and the first inner magnet 212 and the first outer magnet 213 are magnetized in opposite directions. In this way, the magnetic lines of force generated by the first outer magnet 213 and the first inner magnet 212 form a ring-shaped closed magnetic loop, and the magnetic lines of force generated by the second outer magnet 223 and the second inner magnet 222 also form a ring-shaped closed magnetic loop, so that more and more dense magnetic lines of force pass through the voice coil 32, and the driving force is also greater.

[0088] In an embodiment, the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment in the first direction, so that the first voice coil portion 321 and the second voice coil portion 322 respectively located in the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment, improving vibration consistency and avoiding deflection.

[0089] In an embodiment, the first outer magnet 213 is a ring-shaped magnet, which has good continuity and is conducive to improving the uniformity of the magnetic field distribution.

[0090] In an embodiment, the first inner magnet 212 is arranged opposite to the second inner magnet 222, and the first outer magnet 213 is arranged opposite to the second outer magnet 223, which is conducive to the alignment of the first magnetic gap 211 and the second magnetic gap 221, so that the first voice coil portion 321 and the second voice coil portion 322 respectively located in the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment, improving vibration consistency and avoiding deflection.

[0091] In an embodiment, the first inner magnet 212 has the same size in the second direction as the second inner magnet 222, and the first outer magnet 213 has a smaller size in the second direction than the second outer magnet 223. Specifically, the first inner magnet 212 and the second inner magnet 222 are matched in shape, and the first inner magnet 212 has the same size in the horizontal direction as the second inner magnet 222, which is conducive to improving the uniformity of the magnetic field distribution. Further, the first outer magnet 213 has a smaller size in the horizontal direction than the second outer magnet 223, i.e., the outer edge size of the first outer magnet 213 is smaller than the outer edge size of the second outer magnet 223. Compared with the second outer magnet 223, the outer edge of the first outer magnet 213 is designed to be narrower, avoiding interference between the first outer magnet 213 and the diaphragm 31.

[0092] In an embodiment, the sound production unit 100 further comprises a centering bracket 40, which is arranged at one end of the second voice coil part 322 away from the diaphragm 31. The centering bracket 40 comprises an inner fixing part 41, an elastic arm part 42 and an outer fixing part 43 connected in sequence along the second direction. The inner fixing part 41 is connected with the second voice coil part 322, and the outer fixing part 43 is connected with the shell 10. The elastic arm part 42 connects the inner fixing part 41 and the outer fixing part 43. The second magnetic assembly 22 comprises a plurality of second outer magnets 223, which are arranged in a circumferential direction of the second inner magnet 222 at intervals. An avoiding space 224 for avoiding the elastic arm part 42 is formed between any two adjacent second outer magnets 223.

[0093] As shown in FIG. 2 and FIG. 7, the centering bracket 40 is arranged at the bottom end of the second voice coil part 322. The centering bracket 40 comprises the inner fixing part 41, the elastic arm part 42 and the outer fixing part 43, wherein the inner fixing part 41, the elastic arm part 42 and the outer fixing part 43 are connected in sequence from inside to outside along the horizontal direction. The outer fixing part 43 is connected with the shell 10, and the inner fixing part 41 is connected with the second voice coil part 322. The elastic arm part 42 connects the inner fixing part 41 and the outer fixing part 43. The elastic arm part 42 has elasticity, so that the inner fixing part 41 can vibrate with the second voice coil part 322. The centering bracket 40 plays a role of centering and supporting the voice coil 32, preventing the voice coil 32 from being polarized, and improving the vibration stability of the voice coil 32.

[0094] Preferably, the centering bracket 40 is an electrically conductive centering bracket 40. The second voice coil part 322 is connected with the external circuit through the centering bracket 40, so as to realize the conduction between the second voice coil part 322 and the external circuit. The centering bracket 40 can be electrically conductive, and the setting of other conductive parts 151 is omitted, so that the degree of integration is high and the structure is simplified.

[0095] In an embodiment, the inner vibrating plate 3111 has a magnetic conductive part 3113. In the vibration process, due to the action of the magnetic conductive part 3113, the inner vibrating plate 3111 can be subjected to the suction force of the first magnetic assembly 21 and the second magnetic assembly 22. Specifically, when the inner vibrating plate 3111 vibrates towards the first magnetic assembly 21, the resultant force of the suction force of the first magnetic assembly 21 and the second magnetic assembly 22 on the magnetic conductive part 3113 points to the first magnetic assembly 21, which is beneficial to assisting the upward vibration of the inner vibrating plate 3111. When the inner vibrating plate 3111 vibrates towards the second magnetic assembly 22, the resultant force of the suction force of the first magnetic assembly 21 and the second magnetic assembly 22 on the magnetic conductive part 3113 points to the second magnetic assembly 22, which is beneficial to assisting the downward vibration of the inner vibrating plate 3111. Thus, the design of the magnetic conductive part 3113 can assist the vibration of the inner vibrating plate 3111, and improve the sound production effect.

[0096] In an embodiment, the inner vibrating plate 3111 is a magnetic conductive plate member to form the magnetic conductive part 3113, i.e., the inner vibrating plate 3111 itself is a magnetic conductive plate member with magnetic conductive property to form the magnetic conductive part 3113 without the need of additional magnetic conductive part 3113, thus simple structure.

[0097] In another embodiment, as shown in FIG. 9, a magnetic conductive member is embedded in the inner vibrating plate 3111 to form the magnetic conductive part 3113. The magnetic conductive member is embedded in the inner vibrating plate 3111, thus good structural consistency and compactness.

[0098] In yet another embodiment, the inner vibrating plate 3111 is provided with a magnetic conductive member on at least one side along the first direction to form the magnetic conductive part 3113. For example, as shown in FIG. 12, the upper side of the inner vibrating plate 3111 is provided with a magnetic conductive member. For example, as shown in FIG. 10, the lower side of the inner vibrating plate 3111 is provided with a magnetic conductive member. For example, both the upper and lower sides of the inner vibrating plate 3111 are provided with magnetic conductive members.

[0099] In still another embodiment, the inner vibrating plate 3111 is coated with a magnetic conductive material on at least one side surface along the first direction to form the magnetic conductive part 3113. For example, the upper side surface of the inner vibrating plate 3111 is coated with a magnetic conductive material. For example, the lower side surface of the inner vibrating plate 3111 is coated with a magnetic conductive material. For example, both the upper and lower side surfaces of the inner vibrating plate 3111 are coated with magnetic conductive materials.

[0100] The formation and position of the magnetic conductive part 3113 can be set according to actual needs, and the setting mode is various and high in flexibility.

[0101] In the sound production unit 100, the shell 10 includes a first shell 12 and a second shell 13, the first shell 12 and the second shell 13 enclose a containing space 11, the first magnetic assembly 21 is arranged on the first shell 12, the second magnetic assembly 22 is arranged on the second shell 13, and the folding ring 312 is connected to the second shell 13, thus reasonable structure design and convenient assembly. Optionally, the first shell is provided with a sound outlet 16.

[0102] In an embodiment, the first shell 12 includes a bottom wall 121 and a side wall 14 connected to the outer edge of the bottom wall 121, the side wall 14 is provided with a sound outlet 16, the second shell 13 is arranged at one end of the side wall 14 away from the bottom wall 121, the second shell 13 is provided with a plastic support 15 on the side facing the containing space 11, the plastic support 15 is arranged around the second magnetic assembly 22, and the folding ring 312 is connected to the plastic support 15.

[0103] It should be noted that, as shown in Figure 2, the first shell 12 is located on the upper side of the second shell 13. However, in actual assembly, the first shell 12 can be in a posture of being located on the lower side of the second shell 13, so that, as shown in Figure 2, the bottom wall 121 of the first shell 12 is located on the upper side, and the top wall 131 of the second shell 13 is located on the lower side.

[0104] The first shell 12 includes a bottom wall 121 and a side wall 14 connected to the outer edge of the bottom wall 121. The side wall 14 is provided with a sound outlet 16 for facilitating sound emission. The second shell 13 is arranged at the end of the side wall 14 away from the bottom wall 121, and the second shell 13 is provided with a plastic support 15 on the side facing the accommodation space 11. The plastic support 15 surrounds the second magnetic assembly 22, and the folding ring 312 is connected to the plastic support 15 to realize assembly. Moreover, the plastic support 15 and the second shell 13 are integrally injection molded, which is convenient for manufacturing and omits assembly steps and assembly errors. The centering sheet 40 can be connected to the plastic support 15. Specifically, the outer fixed part 43 of the centering sheet 40 can be connected to the plastic support 15. The plastic support 15 is embedded with a conductive part 151, which facilitates conduction with the solder pad on the centering sheet 40.

[0105] In another embodiment, the second shell 13 includes a top wall 131 and a side wall 14 provided with a sound outlet 16. Sound waves on the side of the vibrating plate 311 facing the first magnetic assembly 21 are radiated to the outside through the sound outlet 16. The first shell 12 is arranged at the end of the side wall 14 away from the top wall 131. The top wall 131 is provided with a plastic support 15 on the side facing the accommodation space 11. The plastic support 15 surrounds the second magnetic assembly 22, and the folding ring 312 is connected to the plastic support 15 to realize assembly. Moreover, the plastic support 15 and the second shell 13 are integrally injection molded, which is convenient for manufacturing and omits assembly steps and assembly errors. The centering sheet 40 can be connected to the plastic support 15. Specifically, the outer fixed part 43 of the centering sheet 40 can be connected to the plastic support 15. The plastic support 15 is embedded with a conductive part 151, which facilitates conduction with the solder pad on the centering sheet 40.

[0106] In an embodiment, the first shell 12 is made of metal, which has good durability, high strength, good heat dissipation, and can improve sound quality. The second shell 13 is also made of metal, which has good durability, high strength, good heat dissipation, and can improve sound quality. The second shell 13 can also be made of a magnetic material, which has magnetic guiding ability and is conducive to correcting magnetic lines. The second shell 13 is provided with a leakage hole 17 communicating between the accommodation space 11 and the external environment and a isolation net 18 covering the leakage hole 17. The leakage hole 17 communicates between the accommodation space 11 and the external environment, which can balance the pressure difference between the inside and the outside and improve the sound quality. The isolation net 18 is arranged to prevent the sound-absorbing material filled in the rear cavity 512 of the accommodation space 11 from leaking.

[0107] As shown in FIGS. 12-15, the present application also provides a sound production module 200, comprising a shell 50 and the sound production unit 100 described above, the shell 50 has a receiving cavity 51, and the sound production unit 100 is received in the receiving cavity 51, thereby achieving the receiving of the sound production unit 100. The sound production module 200 can be a loudspeaker module, and can be applied in electronic devices such as computers, mobile phones, smart wear, etc. The specific structure of the sound production unit 100 in the sound production module 200 is referred to the above embodiments. Since the sound production module 200 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0108] The sound production unit 100 divides the receiving cavity 51 into a front cavity 511 and a rear cavity 512. The front cavity 511 is in communication with the external environment, thereby achieving the normal sound emission of the sound production module 200. The rear cavity 512 is filled with sound-absorbing material, thereby adjusting the acoustic performance of the sound production module 200.

[0109] In an embodiment, as shown in FIGS. 14 and 15, the shell 50 comprises a first shell 52 and a second shell 53, and the first shell 52 and the second shell 53 enclose the receiving cavity 51. The first shell 52 is provided with a support wall 55, and the shell body 10 is supported on the support wall 55, thereby improving the installation stability of the sound production unit 100 in the receiving cavity 51. The first magnetic assembly 21 is connected to the first shell 52, and the front cavity 511 is formed between the vibration unit 30 and the first shell 52. The rear cavity 512 is formed between the vibration unit 30, the shell body 10, the second shell 53, and the first shell 52, and the structural design is reasonable.

[0110] In another embodiment, as shown in FIGS. 12 and 13, the shell 50 comprises a first shell 52 and a second shell 53, and the first shell 52 and the second shell 53 enclose the receiving cavity 51. The first shell 52 is provided with an opening 56, and the sound production unit 100 closes the opening 56. The front cavity 511 is formed between the side of the vibration unit 30 close to the first magnetic assembly 21 and the shell body 10 and the first shell 52. The rear cavity 512 is formed between the vibration unit 30, the shell body 10, the second shell 53, and the first shell 52.

[0111] Specifically, in order to achieve the thin and light design of the sound production module 200, the first shell 52 is provided with an opening 56, and the opening 56 forms a hollow area on the first shell 52. The sound production unit 100 received in the receiving cavity 51 can close the opening 56, thereby improving the sealing performance of the sound production module 200. The front cavity 511 is formed between the side of the vibration unit 30 close to the first magnetic assembly 21 and the shell body 10 and the first shell 52. The rear cavity 512 is formed between the vibration unit 30, the shell body 10, the second shell 53, and the first shell 52, and the structural design is reasonable.

[0112] In an embodiment, the rear cavity 512 is filled with sound-absorbing material, the second shell 53 is provided with a filling opening 57 for filling the sound-absorbing material, and the second shell 53 is further provided with a damping member 58 for covering the filling opening 57. The rear cavity 512 is filled with sound-absorbing material, so that the acoustic performance of the sound production module 200 can be adjusted. The second shell 53 is provided with the filling opening 57, so that the sound-absorbing material can be filled into the rear cavity 512. After the filling is completed, the damping member 58 covers the filling opening 57, so that the sound-absorbing material is prevented from leaking.

[0113] The above merely describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made based on the inventive concept of the present application and the content of the specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A sound-emitting monomer, characterized in that, The sound-generating unit includes: A housing having a receiving space and a sound outlet communicating with the receiving space; A magnetic circuit unit is housed within the receiving space. The magnetic circuit unit includes a first magnetic component and a second magnetic component spaced apart along a first direction. The first magnetic component has a first magnetic gap, and the second magnetic component has a second magnetic gap. The first magnetic gap and the second magnetic gap are arranged opposite to each other along the first direction. A vibration unit is located between the first magnetic assembly and the second magnetic assembly. The vibration unit includes a diaphragm and a voice coil connected to the diaphragm. The diaphragm includes a vibrating plate and a folded ring disposed around the vibrating plate. The voice coil includes a first voice coil portion and a second voice coil portion located on both sides of the vibrating plate along the first direction. The first voice coil portion is located in a first magnetic gap, and the second voice coil portion is located in a second magnetic gap. The first voice coil and the second voice coil are wound from the same wire, and the diaphragm includes an inner diaphragm connected to the inner wall of the voice coil and an outer diaphragm connected to the outer wall of the voice coil.

2. The sound-generating unit as described in claim 1, characterized in that, The fold ring includes a plurality of bent portions distributed along the first direction and connected in sequence. The ends of the two outermost bent portions along the first direction respectively form a first end and a second end. The first end is connected to the vibrating plate, and the second end is connected to the housing or the second magnetic component. The sound waves of the vibrating plate toward the first magnetic component are radiated to the outside through the sound outlet.

3. The sound-generating unit as described in claim 2, characterized in that, The first end is connected to the side of the vibrating plate facing the second magnetic component, and the second end is arranged around the second magnetic component; And / or, the outline size of the second end projected along the first direction is greater than the outline size of the first end projected along the first direction; And / or, the outline of the outer edge of the vibrating plate projected along the first direction is located outside the outline of the second magnetic circuit assembly projected along the first direction. And / or, the outline of the outer edge of the vibrating plate projected along the first direction is located outside the outline of the first magnetic circuit assembly projected along the first direction. And / or, the vibrating plate is bent and extended near its outer edge toward the first magnetic component to form a ramp structure, and the first magnetic component is provided with a clearance portion for avoiding the ramp structure.

4. The sound-generating unit as described in claim 1, characterized in that, The folded ring includes a first connecting part, a deformation part, and a second connecting part connected in sequence. The arrangement direction of the first connecting part, the deformation part, and the second connecting part is perpendicular to a first direction. The first connecting part is connected to the vibrating plate, and the second connecting part is connected to the housing.

5. The sound-generating unit as described in claim 1, characterized in that, The first magnetic component includes a first inner magnet and a first outer magnet disposed around the first inner magnet, the first inner magnet and the first outer magnet being spaced apart and forming a first magnetic gap between them; the second magnetic component includes a second inner magnet and a second outer magnet disposed around the second inner magnet, the second inner magnet and the second outer magnet being spaced apart and forming a second magnetic gap between them.

6. The sound-generating unit as described in claim 5, characterized in that, The first inner magnet and the second inner magnet are magnetized in opposite directions, the first outer magnet and the second outer magnet are magnetized in opposite directions, and the first inner magnet and the first outer magnet are magnetized in opposite directions. And / or, the first magnetic gap and the second magnetic gap are aligned along the first direction; And / or, the first external magnet is a ring magnet; And / or, the first inner magnet and the second inner magnet are arranged opposite to each other, and the first outer magnet and the second outer magnet are arranged opposite to each other.

7. The sound-generating unit as described in claim 5, characterized in that, The sound-generating unit also includes a centering support plate, which is disposed at the end of the second voice coil portion away from the diaphragm. The centering support plate includes an inner fixing portion, a spring arm portion, and an outer fixing portion connected in sequence. The inner fixing portion is connected to the second voice coil portion, the outer fixing portion is connected to the housing, and the spring arm portion connects the inner fixing portion and the outer fixing portion. The second magnetic assembly includes a plurality of second outer magnets, which are spaced apart circumferentially along the second inner magnet. An avoidance space is formed between any two adjacent second outer magnets to avoid the spring arm portion. One side of the second voice coil is connected to an external circuit; or, the centering support is a conductive centering support, and the second voice coil is connected to the external circuit through the centering support.

8. The sound-generating unit as described in any one of claims 1 to 7, characterized in that, The housing includes a first housing and a second housing, which together form the receiving space. The first magnetic component is disposed in the first housing, and the second magnetic component is disposed in the second housing. The first housing is provided with the sound outlet.

9. The sound-generating unit as described in claim 8, characterized in that, The first housing includes a bottom wall and a side wall surrounding and connected to the outer edge of the bottom wall. The side wall has the sound outlet. The second housing is disposed at the end of the side wall away from the bottom wall. A plastic bracket is disposed on the side of the second housing facing the receiving space. The plastic bracket surrounds the second magnetic component. The folded ring is connected to the plastic bracket. Alternatively, the second housing includes a top wall and a side wall. The side wall has the sound outlet. The first housing is disposed at the end of the side wall away from the top wall. A plastic bracket is disposed on the side of the top wall facing the receiving space. The plastic bracket surrounds the second magnetic component. The second connecting end is connected to the plastic bracket. The plastic bracket is integrally injection molded with the second housing, and / or a conductive component is embedded in the plastic bracket.

10. The sound-generating unit as described in claim 8, characterized in that, The first housing is made of metal; And / or, the second housing is made of metal; And / or, the second housing is made of a magnetically conductive material; And / or, the second housing is provided with a leakage hole that connects the receiving space and the external environment and an isolation net that covers the leakage hole.

11. The sound-generating unit as described in claim 1, characterized in that, The inner vibrating plate has a magnetically conductive part.

12. The sound-generating unit as described in claim 11, characterized in that, The inner vibrating plate is a magnetically conductive plate to form the magnetically conductive part; Alternatively, a magnetic conductive element may be embedded inside the inner vibrating plate to form the magnetic conductive part; Alternatively, the inner vibrating plate may be provided with a magnetic conductive element on at least one side along the first direction to form the magnetic conductive part; Alternatively, at least one side surface of the inner vibrating plate along the first direction may be coated with a magnetically conductive material to form the magnetically conductive portion.

13. A sound-generating module, characterized in that, The sound-generating module includes a module housing and a sound-generating unit as described in any one of claims 1 to 12.

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