Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and an electronic device, and relates to the technical field of electroacoustic transduction, the sounding device comprises a housing, a magnetic circuit system, a vibration system and a support member, the magnetic circuit system forms a magnetic gap; the vibrating system comprises a vibrating diaphragm, a framework, a voice coil and a centering disk, the vibrating diaphragm is connected with the shell and the framework, one end of the voice coil is connected with the framework, the other end of the voice coil corresponds to the magnetic gap, the framework is provided with a first magnetic attraction part, one end of the centering disk is connected with the end, away from the vibrating diaphragm, of the framework, and the other end of the centering disk is connected with the shell; at least part of the supporting piece is located on the side, opposite to the magnetic circuit system, of the vibrating diaphragm and provided with a second magnetic attraction part, first attraction force exists between the first magnetic attraction part and the second magnetic attraction part, second attraction force exists between the first magnetic attraction part and the magnetic circuit system, and in the non-working state, the vibrating system is located at the balance position under the action of the first attraction force and the second attraction force. According to the technical scheme of the utility model, the low-frequency effect and acoustic performance of the sounding device can be improved.

Description

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202421842453.4, filed on July 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and an electronic device. Background Technology

[0004] In recent years, consumer electronics have experienced rapid development, with smartphones, VR devices, and other electronic equipment gaining consumer acceptance and widespread application. Those skilled in the art have also made corresponding improvements to related supporting products, such as speakers, to meet the sound performance requirements of electronic products and satisfy consumers' needs for product performance.

[0005] Sound-generating devices are crucial electroacoustic transducers in electronic products, widely used as loudspeakers, earpieces, and headphones. With the improvement of electronic product performance, the improvement of the acoustic performance of sound-generating devices is an inevitable trend. Theoretically, the low-frequency loudness of a sound-generating device is closely related to the maximum amount of air its vibrating system can move (the product of maximum amplitude and effective vibration area). To meet acoustic performance requirements, a large vibration space needs to be reserved to accommodate large amplitude demands.

[0006] As the requirements for thinner and lighter electronic devices become increasingly stringent, the assembly space left for miniature sound-generating devices in electronic devices is becoming smaller and smaller. When a larger vibration space is reserved, the space available for installing the magnetic circuit system is also relatively smaller, resulting in a reduction in the size of the magnets in the magnetic circuit system, thereby reducing the product's BL value. This means that even if a larger vibration space is reserved, it is difficult for the diaphragm to reach its maximum amplitude, affecting the acoustic performance of the sound-generating device. Utility Model Content

[0007] The main purpose of this invention is to propose a sound-generating device and electronic device, which aims to reduce the stiffness of the vibration system by using static magnetic force, thereby significantly improving the low-frequency effect of the sound-generating device. By using a frame to connect the voice coil and the centering support, the volume of the magnet in the magnetic circuit system can be increased, the product's BL value can be improved, and thus the acoustic performance of the sound-generating device can be enhanced.

[0008] To achieve the above objectives, the sound-generating device proposed in this utility model includes:

[0009] shell;

[0010] A magnetic circuit system comprises a center magnetic part and a side magnetic part arranged at intervals, and the center magnetic part and the side magnetic part are arranged at intervals to form a magnetic gap;

[0011] A vibration system is arranged on one side of the magnetic circuit system, and the vibration system comprises a diaphragm, a skeleton, a voice coil, and a centering bracket. The outer edge of the diaphragm is connected to the shell, the inner edge of the diaphragm is connected to the skeleton, one end of the voice coil is connected to the skeleton, the other end of the voice coil is arranged corresponding to the magnetic gap, the centering bracket is arranged opposite to the diaphragm at intervals, one end of the centering bracket is connected to the end of the skeleton away from the diaphragm, and the other end of the centering bracket is connected to the shell.

[0012] A support, at least a part of which is located on the side of the diaphragm away from the magnetic circuit system;

[0013] The skeleton is provided with a first magnetic attraction part, the support is provided with a second magnetic attraction part, along the vibration direction of the vibration system, the first magnetic attraction part is arranged opposite to the second magnetic attraction part, the first magnetic attraction part and the second magnetic attraction part have a first attractive force therebetween, the first magnetic attraction part and the magnetic circuit system have a second attractive force therebetween, and in a non-working state, the vibration system is located at a balance position between the second magnetic attraction part and the magnetic circuit system under the action of the resultant force of the first attractive force and the second attractive force.

[0014] In an embodiment, the skeleton comprises a body part and at least two connecting structures, the body part is connected to the diaphragm, one end of the voice coil is connected to the body part, one end of the connecting structure is connected to the body part, the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected to the centering bracket, and the first magnetic attraction part is arranged on the body part.

[0015] In an embodiment, the body part and the connecting structure are arranged in an integrated manner; or the body part and the connecting structure are separate structures connected to each other.

[0016] And / or, the sound generating device has two short sides arranged opposite to each other and two long sides arranged opposite to each other, the skeleton comprises two connecting structures, and the two connecting structures are arranged corresponding to the two short sides or the two long sides respectively.

[0017] And / or, one side of the body part towards the second magnetic attraction part is provided with a recessed part, the recessed part is recessed from the body part to the center magnetic part, and the first magnetic attraction part is arranged in the recessed part.

[0018] And / or, the body part is provided with a hollow hole, the framework further comprises a spherical top part, the spherical top part is arranged on the body part and covers the hollow hole, and the first magnetic attraction part is arranged on the spherical top part;

[0019] And / or, part of the body part is recessed and extended towards the direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected with the connecting frame.

[0020] In an embodiment, the side magnetic part comprises a side magnet and a side magnetic conducting plate arranged in layers, and the side magnetic conducting plate is arranged on the side of the side magnet facing the vibration system;

[0021] The centering support sheet is arranged on the side of the side magnetic conducting plate away from the diaphragm, and there is a gap between at least part of the side magnetic conducting plate and the shell, and the connecting structure passes through the gap.

[0022] In an embodiment, the side magnetic conducting plate and the shell are arranged in an integrated manner; or, the side magnetic conducting plate and the shell are a split structure connected with each other.

[0023] And / or, the side of the side magnetic conducting plate facing the gap is provided with a first avoiding opening;

[0024] And / or, the edge of the side magnet is provided with a second avoiding opening for avoiding the connecting structure.

[0025] In an embodiment, the voice coil comprises a voice coil body and a lead part connected with the voice coil body, the voice coil body is connected with the framework, the connecting structure comprises a first extension part and a second extension part, both ends of the first extension part are connected with the body part and the second extension part respectively, at least part of the first extension part extends along the vibration direction of the vibration system, the second extension part is arranged at an angle with the first extension part and is connected with the centering support sheet, the lead part is arranged along the connecting structure, the lead part comprises a first lead wire arranged along the first extension part and a second lead wire arranged along the second extension part, the centering support sheet is provided with a conductive part, and the second lead wire is connected with the conductive part.

[0026] In an embodiment, the voice coil comprises a voice coil body and a lead part connected with the voice coil body, the voice coil body is connected with the framework, the framework further comprises a conductive layer, the centering support sheet is provided with a conductive part, and the lead part and the conductive part are respectively electrically connected with the conductive layer.

[0027] In an embodiment, the conductive layer is arranged on the connecting structure, or the conductive layer is arranged on the body part and the connecting structure respectively.

[0028] And / or, the conductive layer is arranged on the outer surface of the framework.

[0029] Or, at least part of the skeleton is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injected into the plastic structure.

[0030] In an embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the skeleton, and the centering support is provided with a conductive portion;

[0031] The body portion is an insulating material piece, and the connecting structure is a metal piece, and the connecting structure is electrically connected to the conductive portion and the lead portion, respectively;

[0032] Or, the skeleton includes two component parts made of metal material, at least part of the connecting structure and part of the body portion form the component parts, and the two component parts are separately provided, and each of the component parts is electrically connected to the conductive portion and the lead portion, respectively.

[0033] In an embodiment, the centering support is two, one of which is provided with two conductive portions; or, each of the centering supports is provided with one conductive portion.

[0034] The voice coil includes a voice coil body and two lead portions connected to the voice coil body, the voice coil body is connected to the skeleton, and each of the lead portions is electrically connected to one of the conductive portions.

[0035] In an embodiment, the housing and the magnetic circuit system define an accommodation space therebetween, the centering support includes a first connecting portion, an elastic portion and a second connecting portion connected to each other, the first connecting portion is connected to the housing, the elastic portion and the second connecting portion are located in the accommodation space, and the skeleton is connected to the second connecting portion.

[0036] And / or, the centering support is two, and the two centering supports are arranged on opposite sides of the skeleton.

[0037] In an embodiment, the magnetic circuit system further includes a magnetic yoke, the magnetic yoke includes a main body portion and a bent portion arranged at the outer periphery of the main body portion, the center magnetic portion and the edge magnetic portion are arranged on the side of the main body portion opposite to the vibration system, the bent portion is bent and extended towards the vibration system relative to the main body portion, and the bent portion, the housing and the edge magnetic portion jointly define an accommodation space for accommodating at least part of the centering support.

[0038] And / or, the center magnetic portion includes a center magnet and a center magnetic plate arranged in layers, the center magnetic plate is located on the side of the center magnet facing the vibration system, and along the vibration direction of the vibration system, the center magnetic plate is provided with a recessed area corresponding to the first magnetic attraction portion.

[0039] Part of the center magnetic conductive plate is recessed to form the recessed area in a direction away from the vibration system; or the recessed area is a through-hole structure penetrating the center magnetic conductive plate.

[0040] In an embodiment, the first magnetic attraction part is a magnetic conductive sheet, and the material of the magnetic conductive sheet is SPCC or SUS430.

[0041] And / or, the first magnetic attraction part is formed as a magnetic material coating arranged on the surface of the framework.

[0042] And / or, at least part of the framework is made of a magnetic conductive material to form the first magnetic attraction part.

[0043] And / or, the first magnetic attraction part is embedded in the framework.

[0044] And / or, the first magnetic attraction part is arranged on the surface of the framework facing the second magnetic attraction part.

[0045] And / or, the first magnetic attraction part is arranged on the surface of the framework facing the magnetic circuit system.

[0046] In an embodiment, the second magnetic attraction part is a magnet, the first magnetic attraction part and the center magnetic part have the second magnetic attraction force, and the magnetization direction of the second magnetic attraction part is opposite to that of the center magnetic part.

[0047] And / or, the second magnetic attraction part is arranged on one side of the support facing the first magnetic attraction part.

[0048] And / or, the second magnetic attraction part is arranged on one side of the support facing away from the first magnetic attraction part.

[0049] And / or, the support is provided with a mounting cavity, and the second magnetic attraction part is arranged in the mounting cavity.

[0050] And / or, the second magnetic attraction part is circular, elliptical or polygonal.

[0051] And / or, one side of the support facing the diaphragm is provided with a mounting groove, and the second magnetic attraction part is arranged in the mounting groove.

[0052] And / or, the second magnetic attraction part is provided with at least two, and the at least two second magnetic attraction parts are arranged on the same side or different sides of the support.

[0053] In an embodiment, the sound generating device is provided with a front cover, the front cover is located on one side of the vibration system facing away from the magnetic circuit system, the front cover forms the support, and the outer edge of the diaphragm is connected between the front cover and the shell.

[0054] In an embodiment, the sound production device comprises a module housing, the module housing comprises a module upper shell and a module lower shell which are mutually covered, the module upper shell and the module lower shell enclose an installation space, the magnetic circuit system and the vibration system are arranged in the installation space, the module upper shell is located on the side of the vibration system away from the magnetic circuit system, the module upper shell forms the support, and the second magnetic attraction part is arranged on the module upper shell.

[0055] The utility model discloses still provide a kind of electronic equipment, and the electronic equipment includes the sound production device as described in any one of preceding embodiments.

[0056] The technical scheme of the utility model, first magnetic attraction part is arranged in the vibration system of sound production device, and support is arranged on the side of vibration system away from magnetic circuit system, second magnetic attraction part is arranged on support, so that first magnetic attraction part and second magnetic attraction part have first suction force, first magnetic attraction part and magnetic circuit system have second suction force, so that first magnetic attraction part and support and magnetic circuit system are interacted by using respectively, static magnetic force is introduced in vibration system, so that part of strain recovery force of vibration system can be offset by the resultant force of first suction force and second suction force when vibration system works, vibration system stiffness is reduced by static magnetic force, so that compliance of vibration system is better, so that the amplitude of vibration system can be increased, to greatly improve the low frequency effect of sound production device.

[0057] The utility model in vibration system is connected voice coil and centering branch by framework, so setting, need not make centering branch extend to the position of voice coil, so that magnetic circuit system can not avoid centering branch in the vibration direction of vibration system, so that the magnet setting volume of magnetic circuit system can be increased, the magnetic field intensity of magnetic circuit system acting on vibration system is increased, the BL value of product is increased, to improve the sensitivity of sound production device, so as to improve the performance of sound production device. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creative labor.

[0059] Figure 1 The cross-sectional view of the sound production device first embodiment provided by the utility model is shown in the figure.

[0060] Figure 2 The cross-sectional view of the sound production device first embodiment provided by the utility model is shown in the figure. Figure 1 The cross-sectional view of the sound production device first embodiment provided by the utility model is shown in the figure.

[0061] Figure 3 is Figure 1 the exploded view of the sound production device;

[0062] Figure 4 is Figure 1 the matching structure diagram of the framework and the centering support sheet;

[0063] Figure 5 is Figure 1 the structural diagram of the framework;

[0064] Figure 6 the cross-sectional view of the second embodiment of the sound production device provided by the utility model;

[0065] Figure 7 is Figure 6 the cross-sectional view of another view of the sound production device;

[0066] Figure 8 the cross-sectional view of the third embodiment of the sound production device provided by the utility model;

[0067] Figure 9 is Figure 8 the exploded view of the sound production device;

[0068] Figure 10 is Figure 8 the matching structure diagram of the voice coil, the connecting structure and the centering support sheet of the sound production device;

[0069] Figure 11 the cross-sectional view of the fourth embodiment of the sound production device provided by the utility model;

[0070] Figure 12 is Figure 11 the exploded view of the sound production device;

[0071] Figure 13 is Figure 11 the matching structure diagram of the voice coil, the framework and the centering support sheet of the sound production device;

[0072] Figure 14 the cross-sectional view of the fifth embodiment of the sound production device provided by the utility model;

[0073] Figure 15 is Figure 14 the exploded view of the sound production device;

[0074] Figure 16 the cross-sectional view of the sixth embodiment of the sound production device provided by the utility model;

[0075] Figure 17 is Figure 16 the exploded view of the sound production device;

[0076] Figure 18The explosion view of the sound production device seventh embodiment provided by the utility model;

[0077] Figure 19 The explosion view of two combined parts in the skeleton of the sound production device of the utility model another embodiment;

[0078] Figure 20 The explosion view of two combined parts in the skeleton of the sound production device of the utility model another embodiment;

[0079] Figure 21 The structure view of the centering supporting sheet of the sound production device of the utility model an embodiment;

[0080] Figure 22 The cooperation structure view of the shell and the edge magnetic plate in the sound production device of the utility model an embodiment;

[0081] Figure 23 The vibration direction static magnetic force curve diagram of the sound production device of the utility model an embodiment;

[0082] Figure 24 The rigidity curve diagram of the sound production device of the utility model and the prior design;

[0083] Figure 25 The frequency response performance test diagram of the sound production device of the utility model and the prior design.

[0084] Explanation of the drawing reference number:

[0085] 100, sound device; 1, shell; 2, magnetic circuit system; 21, center magnetic part; 211, center magnet; 212, center magnetic conducting plate; 213, recessed area; 22, edge magnetic part; 221, edge magnet; 222, edge magnetic conducting plate; 223, notch; 224, first avoiding port; 225, second avoiding port; 23, magnetic conducting yoke; 231, main body part; 232, bending part; 233, containing space; 24, magnetic gap; 3, vibration system; 31, diaphragm; 311, inner ring hole; 32, framework; 321, body part; 3211, recessed part; 3212, hollow hole; 3213, connecting frame; 322, connecting structure; 3221, first extension part; 3222, second extension part; 3223, third extension part; 323, first magnetic attraction part; 3231, magnetic conducting sheet; 3232, magnetic material coating; 324, conductive layer; 325, ball top part; 326, component part; 33, voice coil; 331, lead part; 3311, first lead; 3312, second lead; 34, centering support sheet; 341, first connecting part; 342, elastic part; 3421, first elastic arm; 3422, second elastic arm; 3423, third elastic arm; 343, second connecting part; 35, conductive glue; 4, support piece; 41, second magnetic attraction part; 42, front cover; 421, sound hole; 43, module shell; 431, module upper shell; 432, module lower shell; 433, mounting space; 5, mesh cloth.

[0086] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0087] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0088] It should be noted that if the embodiments of the utility model 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 components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0089] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, 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, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of 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, also not within the protection scope required by the utility model.

[0090] The utility model proposes a kind of sound production device 100, sound production device 100 can be applied in electronic equipment, and electronic equipment can be but not limited to smart watch, smart glasses, head-mounted display device, mobile phone, sound equipment, computer, earphone or television etc.

[0091] Please refer to Figures 1 to 3 In an embodiment of the utility model, the sound production device 100 includes shell 1, magnetic circuit system 2, vibration system 3 and support piece 4, magnetic circuit system 2 includes the center magnetic part 21 and the edge magnetic part 22 of interval arrangement, center magnetic part 21 and the edge magnetic part 22 interval arrangement form magnetic gap 24;Vibration system 3 is located at one side of magnetic circuit system 2, and vibration system 3 includes diaphragm 31, framework 32, voice coil 33 and centering support sheet 34, the outer edge of diaphragm 31 is connected with shell 1, the inner edge of diaphragm 31 is connected with framework 32, one end of voice coil 33 is connected with framework 32, the other end of voice coil 33 is correspondingly arranged with magnetic gap 24, centering support sheet 34 is opposite and interval arrangement with diaphragm 31, one end of centering support sheet 34 is connected with the one end of framework 32 away from diaphragm 31, and the other end of centering support sheet 34 is connected with shell 1;At least a part of support piece 4 is located on the side of diaphragm 31 away from magnetic circuit system 2.

[0092] Wherein, framework 32 is provided with first magnetic attraction part 323, support piece 4 is provided with second magnetic attraction part 41, along the vibration direction of vibration system 3, first magnetic attraction part 323 is oppositely arranged with second magnetic attraction part 41, first magnetic attraction part 323 and second magnetic attraction part 41 have first suction force between them, first magnetic attraction part 323 and magnetic circuit system 2 have second suction force between them, in non-working state, vibration system 3 is located in the balance position between second magnetic attraction part 41 and magnetic circuit system 2 under the action of the resultant force of first suction force and second suction force.

[0093] In the embodiment of the utility model, the sound production device 100 can be used as a sound production unit for a loudspeaker, and can form a sound cavity with the shell or other components of an electronic device; the sound production device 100 can also be a sound production module structure, for example, other components of the sound production device 100 are accommodated in a module shell 43, and a sound cavity is formed, so that the sound production device 100 can be used as a sound production component.

[0094] The sound production device 100 comprises a shell 1 and oppositely arranged magnetic circuit system 2 and vibration system 3; the shell 1 can provide a mounting base for other components of the sound production device 100, and is used for mounting, fixing and supporting other components of the sound production device 100, and the magnetic circuit system 2 and the vibration system 3 are connected with the shell 1 respectively. The shell 1 can be an integral structure or a plurality of split structures cooperatively formed. The shell 1 is formed with a cavity, and optionally, the shell 1 can be enclosed to form a closed cavity, or can be enclosed to form a cavity with one end open or both ends through along the vibration direction; in the illustrated embodiment, the shell 1 can be arranged as a ring-shaped frame or frame structure, for example, a square frame structure.

[0095] The magnetic circuit system 2 comprises a center magnetic part 21 and a side magnetic part 22, and the side magnetic part 22 is arranged around the center magnetic part 21 to form a magnetic gap 24 between the center magnetic part 21 and the side magnetic part 22; wherein the side magnetic part 22 can be a closed loop structure, or can be composed of a plurality of sub-magnetic parts arranged along the circumference of the center magnetic part 21. It should be noted that the connection mode of the magnetic circuit system 2 and the shell 1 can be that a magnetic yoke 23 is arranged on the side of the magnetic circuit system 2 away from the vibration system 3, so that the magnetic yoke 23 is connected with the shell 1, and the center magnetic part 21 and the side magnetic part 22 are fixed on the magnetic yoke 23; or the side magnetic part 22 can be connected with the shell 1, and the center magnetic part 21 is connected with the side magnetic part 22 through the magnetic yoke 23; in addition, an installation structure can be arranged on the side of the magnetic circuit system 2 away from the vibration system 3, the installation structure can be a part of the shell 1, or can be an independent component connected with the shell 1, and the magnetic circuit system 2 is fixed on the installation structure to be connected with the shell 1.

[0096] The vibration system 3 comprises a vibrating diaphragm 31 and a voice coil 33, the outer edge of the vibrating diaphragm 31 is connected with the shell 1; optionally, the vibrating diaphragm 31 can comprise a folded ring part, a fixed part connected to the outer edge of the folded ring part, and a central part connected to the inner edge of the folded ring part, the fixed part is connected with the shell 1, and the folded ring part is in a convex structure protruding towards the side of the magnetic circuit system 2 or a convex structure protruding away from the side of the magnetic circuit system 2; the central part can be a complete diaphragm, or an inner ring hole 311 can be provided, and the inner ring hole 311 can be closed by covering the inner ring hole 311 with a reinforcing part or a skeleton 32. The voice coil 33 is connected to the side of the vibrating diaphragm 31 facing the magnetic circuit system 2, the contour of the voice coil 33 is adapted to the magnetic gap 24, and the end of the voice coil 33 away from the vibrating diaphragm 31 is arranged corresponding to the magnetic gap 24 and can be inserted into the magnetic gap 24 or located outside the magnetic gap 24.

[0097] In the embodiment, in order to improve the stability of the vibration system 3 during vibration and avoid problems such as deflection, the vibration system 3 is further provided with a centering support sheet 34 and a skeleton 32, one end of the skeleton 32 is connected with the vibrating diaphragm 31, wherein in the embodiment of the utility model, the skeleton 32 is connected to the inner edge of the vibrating diaphragm 31, and the skeleton 32 is connected to the central part of the vibrating diaphragm 31, for example, the central part mentioned in the foregoing embodiment, when the vibrating diaphragm 31 is a complete diaphragm structure, the skeleton 32 is arranged in layers with the vibrating diaphragm 31, and when the vibrating diaphragm 31 has an inner ring hole 311 in the middle, the skeleton 32 is connected to the edge area of the inner ring hole 311. The arrangement of the skeleton 32 can be used to improve the structural strength of the middle area of the vibrating diaphragm 31. The centering support sheet 34 is arranged opposite to the vibrating diaphragm 31 and located on the side of the vibrating diaphragm 31 facing the voice coil 33, the outer edge of the centering support sheet 34 is connected with the shell 1; one end of the skeleton 32 away from the vibrating diaphragm 31 extends to the centering support sheet 34 and is connected with the centering support sheet 34, and the end of the voice coil 33 facing the vibrating diaphragm 31 is connected to the part of the skeleton 32 connected with the vibrating diaphragm 31, that is, the voice coil 33 is connected with the centering support sheet 34 through the skeleton 32. The centering support sheet 34 can be arranged in a spring sheet structure, or can comprise a first connecting part 341 connected with the shell 1 and an elastic part 342 capable of elastic deformation as in the following embodiment; the centering support sheet 34 can be elastically deformed with the vibration of the vibrating diaphragm 31 and the voice coil 33.

[0098] By connecting the centering support sheet 34 and the voice coil 33 through the skeleton 32, the centering support sheet 34 does not need to extend to the position of the voice coil 33 and be connected with the voice coil 33, at this time, in the vibration direction of the vibration system 3, the magnetic circuit system 2 does not need to avoid the centering support sheet 34, and can increase the setting volume of the magnet in the magnetic circuit system 2, so as to increase the volume of the magnetic circuit system 2, which is beneficial to increase the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, increase the BL value of the product, and improve the sensitivity of the sound generating device 100, thereby improving the performance of the sound generating device 100.

[0099] The centering fins 34 can be an integral structure arranged along the circumference of the vibration system 3, or a plurality of centering fins 34 can be arranged along the circumference of the voice coil 33, in which case the centering fins 34 can be connected to each other, or two adjacent centering fins 34 can be arranged with a spacing therebetween, for example, two centering fins 34 can be arranged on opposite sides of the skeleton 32. The centering fins 34 can be made of metal, plastic or other materials, or at least two different materials can be used to form the centering fins 34. In some embodiments, the centering fins 34 can be made of conductive material, or a conductive circuit can be arranged on the centering fins 34, so that the lead part 331 of the voice coil 33 is electrically connected to the external circuit through the centering fins 34, improving the convenience of electrical connection of the voice coil 33.

[0100] Optionally, the skeleton 32 can be integrally formed, or can be composed of at least two separate structures connected to each other. The skeleton 32 can be made of metal, plastic or other materials such as carbon fiber, or at least two different materials can be used to form different structures of the skeleton 32, which is not limited here.

[0101] Optionally, the magnetic gap 24 formed in the magnetic circuit system 2 can be square in shape, and the voice coil 33 of the vibration system 3 can also be square in shape to match the magnetic gap 24. For example, the center magnetic part 21 and the side magnetic part 22 of the magnetic circuit system 2 can both be square in shape, or the center magnetic part 21 can be square in shape, and the inner contour of the side magnetic part 22 can be square in shape, while the outer contour of the side magnetic part 22 can be circular or other shapes. In addition, the magnetic gap 24 formed by the magnetic circuit system 2 can also be circular, elliptical or other shapes.

[0102] The utility model embodiment, the skeleton 32 of vibration system 3 is provided with first magnetic attraction part 323, first magnetic attraction part 323 can set one, also can set two or more than two, first magnetic attraction part 323 can be arranged on the surface of skeleton 32, be embedded in the inside of skeleton 32 or make skeleton 32 connect on the edge of first magnetic attraction part 323, also can adopt the magnetic conductive material and make at least part skeleton 32 to serve as first magnetic attraction part 323. The side of diaphragm 31 facing away from magnetic circuit system 2 is provided with support 4, support 4 is arranged with diaphragm 31 spacing, and second magnetic attraction part 41 is arranged on support 4;Support 4 can be a part of shell 1, also can be the structure connected with shell 1, for example can be front cover 42 in the following embodiment;When sound production device 100 is arranged as module structure, the upper shell 431 of module can also be used as support 4;Of course, the structure of support 4 is not limited to the structure design form described above. Second magnetic attraction part 41 can be connected with support 4, that is, support 4 is used to support and fix second magnetic attraction part 41, and second magnetic attraction part 41 can be arranged on the surface of support 4, or embedded in the inside of support 4, in some embodiments, support 4 itself can also form second magnetic attraction part 41.

[0103] First magnetic attraction part 323 and second magnetic attraction part 41 have first suction force;First magnetic attraction part 323 and magnetic circuit system 2 have second suction force, when sound production device 100 is in non-working state, vibration system 3 is located between second magnetic attraction part 41 and magnetic circuit system 2 under the action of the resultant force of first suction force and second suction force. First magnetic attraction part 323 can be set as the magnetic conductive structure that can be attracted by magnet, for example, set as magnetic conductive sheet 3231, magnetic material coating 3232 etc., and second magnetic attraction part 41 is set as magnet;Both can make first magnetic attraction part 323 be attracted by second magnetic attraction part 41 and magnetic circuit system 2, and the total attractive force of first magnetic attraction part 323 can be used as the force applied on vibration system 3. And, in the embodiment, first magnetic attraction part 323 and second magnetic attraction part 41 are oppositely arranged in the vibration direction of vibration system 3, which can make first magnetic attraction part 323 better in the magnetic field range of second magnetic attraction part 41, increase the first suction force between first magnetic attraction part 323 and second magnetic attraction part 41.

[0104] It can be understood that when the vibration system 3 works, the resultant force of the first attractive force and the second attractive force is opposite to the direction of the strain restoring force of the vibration system 3 and is smaller than the strain restoring force of the vibration system 3; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first attractive force and the second attractive force is not greater than the stiffness of the vibration system 3, so that the vibration system 3 is located at the equilibrium position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the resultant force of the first attractive force and the second attractive force. Specifically, when the vibration system 3 works, the first magnetic attraction part 323 reciprocates between the second magnetic attraction part 41 and the magnetic circuit system 2, when the first magnetic attraction part 323 approaches the second magnetic attraction part 41, it is away from the magnetic circuit system 2, the attractive force between the first magnetic attraction part 323 and the second magnetic attraction part 41 becomes larger, and the attractive force between the first magnetic attraction part 323 and the magnetic circuit system 2 becomes smaller, and the resultant force of the first attractive force and the second attractive force is towards the direction of the second magnetic attraction part 41. When the first magnetic attraction part 323 approaches the magnetic circuit system 2, it is away from the second magnetic attraction part 41, the attractive force between the first magnetic attraction part 323 and the second magnetic attraction part 41 becomes smaller, and the attractive force between the first magnetic attraction part 323 and the magnetic circuit system 2 becomes larger, and the resultant force of the first attractive force and the second attractive force is towards the direction of the magnetic circuit system 2.

[0105] In a specific application, taking the vibration of the vibration system 3 in the up-down direction as an example, the movement of the vibration system 3 towards the direction of the second magnetic attraction part 41 is upward movement, and the movement of the vibration system 3 towards the direction of the magnetic circuit system 2 is downward movement. When the vibration system 3 does not work, the vibration system 3 is located at the initial position. When the vibration system 3 works, the voice coil 33 drives the diaphragm 31 to vibrate up and down, so that the vibration system 3 vibrates up and down. When the vibration system 3 moves upwards to above the initial position, the direction of the strain restoring force of the vibration system 3 is downward, at this time, the first attractive force between the first magnetic attraction part 323 and the second magnetic attraction part 41 is greater than the second attractive force between the first magnetic attraction part 323 and the magnetic circuit system 2, the resultant force of the first attractive force and the second attractive force is upward and smaller than the strain restoring force of the vibration system 3, at this time, the action of the resultant force of the first attractive force and the second attractive force on the vibration system 3 can offset a part of the strain restoring force of the vibration system 3. When the vibration system 3 moves downward to below the initial position, the direction of the strain restoring force of the vibration system 3 is upward, at this time, the first attractive force between the first magnetic attraction part 323 and the second magnetic attraction part 41 is smaller than the second attractive force between the first magnetic attraction part 323 and the magnetic circuit system 2, the resultant force of the first attractive force and the second attractive force is downward and smaller than the strain restoring force of the vibration system 3, at this time, the action of the resultant force of the first attractive force and the second attractive force on the vibration system 3 can offset a part of the strain restoring force of the vibration system 3.

[0106] It should be noted that the first attractive force between the first magnetic attraction part 323 and the second magnetic attraction part 41 and the second attractive force between the first magnetic attraction part 323 and the magnetic circuit system 2 change with the position of the vibration system 3, and the resultant force of the first attractive force and the second attractive force acting on the first magnetic attraction part 323, that is, the static magnetic force acting on the vibration system 3, is not fixed. During the vibration process of the vibration system 3, the static magnetic force acting on the vibration system 3 is proportional to the strain restoring force of the vibration system 3. That is, the greater the distance of the vibration system 3 from the initial position, the greater the static magnetic force acting on the vibration system 3. The smaller the distance of the vibration system 3 from the initial position, the smaller the static magnetic force acting on the vibration system 3. The static magnetic force is shown as Figure 23 . .

[0107] Specifically, the system stiffness Kms is composed of the vibration system 3 stiffness Km and the cavity stiffness Kb, that is, Kms=Km+Kb. Considering that the static magnetic force is related to the position of the vibration system 3, similar to the system stiffness Kms, the stiffness generated by the static magnetic force is defined as Kt, Kt=static magnetic force / vibration direction displacement, and the total stiffness of the system becomes: Kms=Km+Kb-Kt, wherein Kms is the system stiffness, Km is the vibration system 3 stiffness, and Kb is the cavity stiffness. At this time, with the increase of the displacement, the system stiffness decreases, that is, the greater the amplitude, the softer the system, which is matched with the BL(x) curve trend, and the low-frequency performance is higher, as shown in Figure 24 and Figure 25 . .

[0108] Therefore, by introducing the first magnetic attraction part 323 in the vibration system 3, the vibration system 3 is subjected to the static magnetic force of the magnetic circuit system 2 and the second magnetic attraction part 41, the stiffness of the vibration system 3 is reduced by the static magnetic force, the ductility of the vibration system 3 is better, the amplitude of the vibration system 3 can be increased, and thus the low-frequency effect of the sound production device 100 can be improved.

[0109] That is, the technical scheme of the utility model, the first magnetic attraction part 323 is arranged in the vibration system 3 of the sound production device 100, a support 4 is arranged on the side of the vibration system 3 away from the magnetic circuit system 2, the second magnetic attraction part 41 is arranged on the support 4, the first magnetic attraction part 323 and the second magnetic attraction part 41 have a first attractive force, and the first magnetic attraction part 323 and the magnetic circuit system 2 have a second attractive force. Thus, the first magnetic attraction part 323 interacts with the second magnetic attraction part 41 of the support 4 and the magnetic circuit system 1 respectively, the static magnetic force is introduced in the vibration system 3, and thus part of the strain restoring force of the vibration system 3 can be offset by the resultant force of the first attractive force and the second attractive force when the vibration system 3 works, the stiffness of the vibration system 3 is reduced by the static magnetic force, the ductility of the vibration system 3 is better, and thus the amplitude of the vibration system 3 can be increased, so that the low-frequency effect of the sound production device 100 can be greatly improved.

[0110] The utility model discloses a skeleton 32 is connected voice coil 33 and centering branch 34 in vibration system 3, so set up, need not make centering branch 34 extend to the position of voice coil 33, so that magnetic circuit system 2 can not avoid centering branch 34 in the vibration direction of vibration system 3, thereby can increase the magnet setting volume of magnetic circuit system 2, increase the magnetic field intensity of magnetic circuit system 2 that acts on vibration system 3, increase the BL value of product, to promote the sensitivity of sound production device 100, thereby improve the performance of sound production device 100.

[0111] In an embodiment, the skeleton 32 includes a body portion 321 and at least two connecting structures 322. The body portion 321 is connected with the diaphragm 31, one end of the voice coil 33 is connected with the body portion 321, one end of the connecting structure 322 is connected with the body portion 321, and the other end of the connecting structure 322 is bent and extended towards a direction away from the diaphragm 31 to be connected with the centering branch 34. The first magnetic attraction portion 323 is arranged on the body portion 321.

[0112] In the embodiment, the skeleton 32 includes the body portion 321 connected with the diaphragm 31 and the at least two connecting structures 322 connected with the body portion 321. The body portion 321 can be an integral structure formed by one piece or formed by connecting at least two separate structures. The connecting structures 322 can be two, three, four or more, and each connecting structure 322 is connected with the centering branch 34. Optionally, the connecting structures 322 of the skeleton 32 are uniformly distributed along the circumference of the body portion 321. The connecting structures 322 can be integrally formed with at least part of the body portion 321. For example, the skeleton 32 can be integrally formed as a whole, or the body portion 321 can include at least two parts connected with each other, and the connecting structures 322 are integrally formed with one part of the body portion 321. Alternatively, the connecting structures 322 and the body portion 321 can be separately arranged, and the connecting structures 322 are connected with the body portion 321. In some embodiments, part of the connecting structures 322 are integrally formed with the body portion 321, and the other part of the connecting structures 322 are arranged as separate structures connected with each other. For example, two connecting structures 322 are taken as an example, one of the connecting structures 322 is integrally formed with the body portion 321, and the other connecting structure 322 is arranged as a separate structure connected with the body portion 321.

[0113] In the embodiment, the first magnetic attraction portion 323 is arranged on the body portion 321, so that the static magnetic force acting on the first magnetic attraction portion 323 can better act on the middle area of the diaphragm 31, the vibration system 3 is balanced, and the problem of deflection is avoided.

[0114] Please refer to Figure 4 In an embodiment, the body portion 321 and the connecting structure 322 are integrally formed.

[0115] In the embodiment, the skeleton 32 can be integrally formed as a whole, or the body part 321 can include at least two parts connected with each other, and the connecting structure 322 is integrally formed with one of the body parts 321. The body part 321 and the connecting structure 322 are connected by integrally forming, so that the connection strength between the body part 321 and the connecting structure 322 is higher, the overall structure stability of the skeleton 32 is better, and the body part 321 and the connecting structure 322 can be better avoided from being separated, so that the centering support sheet 34 can be better fixed by the skeleton 32 to make the position and movement process of the vibration system 3 more stable.

[0116] Please refer to Figures 8 to 10 In some embodiments, the body part 321 and the connecting structure 322 are separate structures connected with each other. In this way, the body part 321 and the connecting structure 322 can be manufactured separately, which is convenient for processing the body part 321 and the connecting structure 322, and is convenient for designing the structure of the body part 321 and the connecting structure 322 respectively. In addition, the body part 321 and the connecting structure 322 can be made of different materials to meet different needs. For example, the body part 321 can be made of plastic material, and the connecting structure 322 can be made of metal material to be electrically connected with the lead part 331 of the voice coil 33 and the centering support sheet 34.

[0117] In the embodiment, the body part 321 and the connecting structure 322 can be connected by bonding, welding or the like, which is not limited here.

[0118] Please refer to Figure 10 In an embodiment, the sound generating device 100 has two short sides arranged opposite to each other and two long sides arranged opposite to each other, and the skeleton 32 includes two connecting structures 322, which are arranged on the two short sides or the two long sides respectively.

[0119] In the embodiment, the sound production device 100 is arranged in a substantially square shape, and the vibration system 3 and the magnetic circuit system 2 are arranged in a square or approximately square structure. The sound production device 100 has two opposite short sides and two opposite long sides. The framework 32 is provided with two connecting structures 322 located on both sides of the body part 321, and the two connecting structures 322 are symmetrically arranged to be connected to the centering support sheet 34. At this time, the two connecting structures 322 can be arranged on the two short sides respectively, or the two connecting structures 322 can be arranged on the two long sides respectively. In this way, the framework 32 can be uniformly supported on the centering support sheet 34, and the elastic force of the centering support sheet 34 on the voice coil 33 and the diaphragm 31 can be uniform during the vibration of the vibration system 3, so that the vibration process is stable and the risk of deflection is reduced. In addition, the framework 32 does not need to be provided with too many connecting structures 322, so that the structure of the framework 32 can be simplified, the overall structure is simple, and the installation is convenient.

[0120] For reference Figures 1 to 3 In an embodiment, the body part 321 is provided with a recessed part 3211 on the side facing the second magnetic attraction part 41. The recessed part 3211 is recessed from the center magnetic part 21 to the body part 321, and the first magnetic attraction part 323 is arranged in the recessed part 3211.

[0121] In the embodiment, the body part 321 is provided with a recessed part 3211 on the side facing the first magnetic attraction part 323. The recessed part 3211 is a groove structure. The arrangement of the recessed part 3211 can increase the gap between the first magnetic attraction part 323 and the second magnetic attraction part 41, thereby increasing the vibration space for the vibration system 3 to move to the side of the second magnetic attraction part 41, reducing the risk of interference between the vibration system 3 and the second magnetic attraction part 41, and facilitating the increase of the amplitude of the vibration system 3 and the improvement of the low-frequency effect and performance of the sound production device 100. Optionally, the first magnetic attraction part 323 can be arranged on the surface of the recessed part 3211 facing the second magnetic attraction part 41, or on the surface of the recessed part 3211 facing the magnetic circuit system 2, or embedded in the recessed part 3211. In addition, the first magnetic attraction part 323 can also be arranged on the spherical top part 325 provided in the recessed part 3211, which will not be described here.

[0122] For reference Figures 1 to 3 In an embodiment, the body part 321 is provided with a hollow hole 3212, and the framework 32 further includes a spherical top part 325 arranged on the body part 321 and covering the hollow hole 3212. The first magnetic attraction part 323 is arranged on the spherical top part 325.

[0123] In the embodiment, the partial skeleton 32 laminated with the diaphragm 31 is composed of a body part 321 and a ball top part 325, wherein the ball top part 325 covers the hollow hole 3212 of the body part 321, and the ball top part 325 and the body part 321 can be connected by adhesion or other ways, so that the ball top part 325 is sealed with the body part 321, avoiding the problem of air leakage at the hollow hole 3212. The ball top part 325 can be a flat structure, or the ball top part 325 can have a convex arc surface. The first magnetic attraction part 323 is arranged on the ball top part 325, which can be arranged on the surface of the ball top part 325 facing the second magnetic attraction part 41, or arranged on the surface of the ball top part 325 facing the magnetic circuit system 2, or embedded in the inside of the ball top part 325. In addition, the ball top part 325 can be made of magnetic conductive material, so that the ball top part 325 serves as the first magnetic attraction part 323.

[0124] In the embodiment, by arranging the split ball top part 325 and the body part 321, when the ball top part 325 is made of magnetic conductive material to serve as the first magnetic attraction part 323 or the first magnetic attraction part 323 is formed by arranging a magnetic material coating 3232 on the ball top part 325, the volume and arrangement area of the first magnetic attraction part 323 can be easily controlled, so that the size of the static magnetic force acting on the vibration system 3 can be easily controlled, and different product performance requirements can be met. In addition, by this arrangement, the body part 321 can be made of other materials to meet the performance requirements. For example, the body part 321 can be made of metal to improve the structural strength, and in some embodiments, the body part 321 can also meet the conductive requirement. In addition, the body part 321 can be made of plastic or other materials to achieve at least one of the effects of reducing product weight, simplifying structure, and facilitating manufacturing.

[0125] Please refer to Figure 2 In an embodiment, the body part 321 is recessed and extended in the direction close to the magnetic circuit system 2 to form a connecting frame 3213, and one end of the voice coil 33 close to the diaphragm 31 is connected with the connecting frame 3213.

[0126] In the embodiment, the surface of the body part 321 facing the voice coil 33 is provided with the connecting frame 3213, which can be recessed on the side of the voice coil 33, so that a recessed area 213 is formed on the surface of the body part 321 away from the voice coil 33. The connecting frame 3213 can also be a protruding structure formed on the surface of the body part 321 facing the voice coil 33, and the surface of the body part 321 away from the voice coil 33 can still be a flat surface. The arrangement of the connecting frame 3213 can adjust the relative position of the voice coil 33 and the magnetic gap 24 in the vibration direction, so that the voice coil 33 is located in a region with high magnetic field density, thereby improving the BL value.

[0127] Please refer to Figure 1 and Figure 3 In an embodiment, the side magnetic part 22 comprises a side magnet 221 and a side magnetic conductive plate 222 which are arranged in a stacked manner, and the side magnetic conductive plate 222 is arranged on the side of the side magnet 221 facing the vibration system 3; the centering support sheet 34 is arranged on the side of the side magnetic conductive plate 222 away from the diaphragm 31, and at least part of the side magnetic conductive plate 222 and the shell 1 have a gap 223, and the connecting structure 322 passes through the gap 223.

[0128] In this embodiment, the side magnetic part 22 of the magnetic circuit system 2 comprises a side magnet 221 and a side magnetic conductive plate 222, and the side magnetic conductive plate 222 is arranged on the side of the side magnet 221 facing the vibration system 3, and the side magnet 221 and the side magnetic conductive plate 222 are both arranged around the center magnetic part 21; the arrangement of the side magnetic conductive plate 222 can have a magnetic concentrating effect on the magnetic field lines on the side of the magnetic circuit system 2 facing the vibration system 3, so as to concentrate the magnetic field lines on the side of the vibration system 3, reduce magnetic leakage, and improve the magnetic field strength.

[0129] Along the vibration direction of the vibration system 3, the centering support sheet 34 is arranged on the side of the side magnetic conductive plate 222 away from the diaphragm 31, and the outer edge of the side magnetic conductive plate 222 can be arranged in a spaced manner with the shell 1 to form a gap 223; or part of the outer edge of the side magnetic conductive plate 222 can be connected with the shell 1, and the other part of the outer edge of the side magnetic conductive plate 222 can be arranged in a spaced manner with the shell 1 to form a gap 223; or the gap 223 can be arranged on the side magnetic conductive plate 222; and the connecting structure 322 of the skeleton 32 passes through the gap 223 and is connected with the centering support sheet 34. In this arrangement, the centering support sheet 34 can be arranged on the side of the magnetic circuit system 2 facing the diaphragm 31, and at this time, the magnetic circuit system 2 can extend to the side close to the diaphragm 31 without avoiding the centering support sheet 34 on the side adjacent to the diaphragm 31, so as to increase the volume of the magnet in the magnetic circuit system 2, which is beneficial to increase the magnetic field strength and thus improve the BL value; in some embodiments, the distance between the magnetic circuit system 2 and the diaphragm 31 can also be reduced, which is beneficial to reduce the thickness of the sound generating device 100.

[0130] Please refer to Figure 22 In an embodiment, the side magnetic conductive plate 222 and the shell 1 are integrally arranged.

[0131] In this embodiment, the side magnetic conductive plate 222 and the shell 1 can be integrally injection molded, for example, the side magnetic conductive plate 222 is placed in a mold for injection molding the shell 1, so that the shell 1 and the side magnetic conductive plate 222 can be connected when the shell 1 is injection molded. This connection mode has high connection strength between the side magnetic conductive plate 222 and the shell 1, and good overall structural stability, and is not easy to separate.

[0132] Please refer to Figure 1In an embodiment, the side magnetic plate 222 and the shell 1 are in a connected split structure. The side magnetic plate 222 can be fixed to the shell 1 by means of adhesion, clamping, screwing, or the like. In this way, the side magnetic plate 222 and the shell 1 can be formed separately, which is convenient for manufacturing and flexible for assembly.

[0133] Referring to Figure 22 In an embodiment, the side magnetic plate 222 is provided with a first avoiding opening 224 on the side facing the gap 223. The first avoiding opening 224 can reduce the risk of interference of the skeleton 32 with the side magnetic plate 222 during vibration of the vibration system 3, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage caused by mutual collision or friction between the skeleton 32 and the side magnetic plate 222.

[0134] Referring to Figure 3 In an embodiment, the side magnetic plate 222 is provided with a first avoiding opening 224 on the side facing the gap 223. The first avoiding opening 224 can reduce the risk of interference of the skeleton 32 with the side magnetic plate 222 during vibration of the vibration system 3, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage caused by mutual collision or friction between the skeleton 32 and the side magnetic plate 222.

[0135] Referring to Figures 11 to 13 , and Figure 18 In an embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body. The voice coil body is connected to the skeleton 32. The connecting structure 322 includes a first extension portion 3221 and a second extension portion 3222. The two ends of the first extension portion 3221 are connected to the body portion 321 and the second extension portion 3222, respectively. At least part of the first extension portion 3221 extends along the vibration direction of the vibration system 3. The second extension portion 3222 is arranged at an angle with the first extension portion 3221 and is connected to the centering bracket 34. The lead portion 331 is arranged along the connecting structure 322. The centering bracket 34 is provided with a conductive portion. The lead portion 331 includes a first lead 3311 arranged along the first extension portion 3221 and a second lead 3312 arranged along the second extension portion 3222. The second lead 3312 is connected to the conductive portion.

[0136] In this embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 extending outward from the voice coil body, one end of the voice coil body is connected with the skeleton 32, and the other end is arranged corresponding to the magnetic gap 24 of the magnetic circuit system 2; the lead portion 331 is electrically connected with the conductive portion of the centering support sheet 34, so that the voice coil 33 can be connected with the external circuit through the centering support sheet 34, without extending the lead portion 331 outward, facilitating the electrical connection between the voice coil 33 and the external circuit. The centering support sheet 34 can be made of conductive material such as metal, or a circuit layer can be arranged on the surface or inside of the centering support sheet 34; the conductive portion can be a pad arranged on the centering support sheet 34, and the connection between the lead portion 331 and the conductive portion can be achieved by conductive glue 35 or soldering. The lead portion 331 is usually provided with two, corresponding to two electrodes, and two independent conductive portions can be arranged on the centering support sheet 34, or the conductive portion can be arranged on the two centering support sheets 34 to connect with the two lead portions 331. The conductive portion can be a pad arranged on the centering support sheet 34, and the conductive portion can be electrically connected with the conductive line layer on the surface or inside of the centering support sheet 34, or the centering support sheet 34 can be made of conductive material such as metal, which is not limited here.

[0137] The connecting structure 322 of the skeleton 32 includes a first extension portion 3221 and a second extension portion 3222 arranged at an angle, the first extension portion 3221 can be arranged as a straight extension structure, one end of the first extension portion 3221 is connected with the body portion 321, and the other end extends to the centering support sheet 34 in a direction away from the diaphragm 31, and the second extension portion 3222 is bent relative to the first extension portion 3221 and connected with the centering support sheet 34; in some embodiments, the first extension portion 3221 can also be arranged as a bent structure, including a first section extending in the plane direction of the diaphragm 31 and a second section extending in the vibration direction, one end of the first section is connected with the body portion 321, and the second section extends from the first section in a direction away from the diaphragm 31 and is connected with the centering support sheet 34. Alternatively, when the connecting structure 322 and the body portion 321 are arranged as a separate structure connected with each other, a third extension portion 3223 extending in part of the circumferential direction of the body portion 321 can be arranged at one end of the first extension portion 3221 connected with the body portion 321, so that the third extension portion 3223 is connected with the body portion 321, increasing the connection area and improving the connection strength.

[0138] In the embodiment, the lead part 331 of the voice coil 33 includes a first lead 3311 and a second lead 3312 connected with each other, the first lead 3311 is arranged along the first extension part 3221 in line, and the second lead 3312 is arranged along the second extension part 3222 in line, so that the lead part 331 can be directly connected with the conductive part on the centering branch 34, without the need to arrange a conductive line on the skeleton 32, thereby simplifying the structural design of the skeleton 32, and the skeleton 32 can be made of an insulating material with lighter mass, thereby also reducing the overall weight of the vibration system 3 and improving the vibration sensitivity of the vibration system 3.

[0139] In addition, the lead part 331 of the voice coil 33 is arranged along the connecting structure 322 in line, and the lead part 331 does not directly span above the magnetic circuit system 2, so that the magnetic circuit system 2 does not need to avoid the lead part 331 in the vibration direction of the vibration system 3, the setting volume of the magnet in the magnetic circuit system 2 can be increased, which is beneficial to increase the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, thereby improving the BL value of the product and improving the acoustic performance of the sound generating device 100. In addition, the lead part 331 can also move synchronously with the connecting structure 322 in the vibration process of the vibration system 3, thereby avoiding the problem of collision and wire breakage of the lead part 331 with the connecting structure 322, ensuring the stable connection of the lead part 331 with the centering branch 34, and the acoustic performance of the sound generating device 100 is improved and relatively stable.

[0140] Optionally, the second lead 3311 and the second extension part 3222 can be arranged in line in the vibration direction of the vibration system 3, so that the second lead 3311 and the second extension part 3222 are connected on the two sides of the centering branch 34 respectively. The second lead 3311 can also be arranged on the side of the second extension part 3222, so that the second lead 3311 and the second extension part 3222 are connected on the same side of the centering branch 34.

[0141] Please refer to Figure 1 and Figure 5 In an embodiment, the voice coil 33 includes a voice coil body and a lead part 331 connected with the voice coil body, the voice coil body is connected with the skeleton 32, the skeleton 32 further includes a conductive layer 324, the centering branch 34 is provided with a conductive part, and the lead part 331 and the conductive part are respectively connected with the conductive layer 324.

[0142] In the embodiment, the conductive layer 324 is arranged on the frame 32, the lead part 331 of the voice coil 33 and the conductive part of the centering branch 34 are electrically connected with the conductive layer 324, so that the lead part 331 of the voice coil 33 is electrically connected with the conductive part of the centering branch 34 through the conductive layer 324, the electrical connection between the lead part 331 and the centering branch 34 is more convenient; and in this arrangement, the voice coil 33 does not need to have a long lead part 331, the problem of interference between the lead part 331 and other components due to the long lead part 331 can be avoided, the vibration system 3 can stably move, the performance stability is improved, and the wire breakage due to the long lead part 331 can also be prevented. The connection between the lead part 331 and the frame 32 can be achieved by the conductive adhesive 35 or by welding. Alternatively, the conductive part can be a solder pad arranged on the centering branch 34, the centering branch 34 and the frame 32 can be connected by the conductive adhesive 35 or by welding, and the centering branch 34 and the frame 32 can also be connected in a plug-in manner, which is not limited herein. Alternatively, the conductive layer 324 can be formed by arranging metal wires, metal conductive sheets or conductive films on the surface of the frame 32, or the conductive layer 324 can be formed by arranging metal wires or metal conductive sheets inside the frame 32 made of insulating material.

[0143] The voice coil 33 usually has two lead parts 331 corresponding to two electrodes, in the embodiment, two independent conductive parts can be arranged on the same centering branch 34, and the conductive part can be a solder pad arranged on the centering branch 34; when there are at least two centering branches 34, the conductive part can be arranged on at least two centering branches 34. The conductive layer 324 on the frame 32 forms two independent conductive lines, each of which is electrically connected with a lead part 331 and a centering branch 34, wherein the two conductive lines can be arranged on two connection structures 322, or can be arranged at different positions along the thickness direction of the frame 32, for example, the two conductive lines can be arranged on different surfaces of the frame 32 facing away from each other in the vibration direction, or one conductive line is arranged on the surface of the frame 32 and the other conductive line is embedded in the inner side of the frame 32. It should be noted that in the embodiment, the conductive layer 324 can be arranged only on the connection structure 322, or part of the conductive layer 324 can be arranged on the body part 321, the specific arrangement is described below and is not repeated herein.

[0144] Please refer to Figure 5In an embodiment, the conductive layer 324 is arranged on the connecting structure 322. In this case, the connecting structure 322 can be made of plastic or other insulating material, or can be made of metal. The conductive layer 324 can be arranged on the surface of the connecting structure 322, or can be arranged in the connecting structure 322. For example, a conductive film can be arranged on the surface of the connecting structure 322 as the conductive layer, or a metal wire or a metal conductive sheet can be arranged in the connecting structure 322 made of plastic or other insulating material to form the conductive layer 324. It should be noted that in the present embodiment, the body part 321 can be made of insulating material, or can be made of conductive material such as metal. The lead part 331 of the voice coil 33 can extend to the connecting structure 322 and be electrically connected to the conductive layer 324. The connecting structure 322 and the lead part 331 can be connected by conductive glue 35 or by welding. Similarly, the centering sheet 34 and the connecting structure 322 can be connected by conductive glue 35 or by welding. Alternatively, the centering sheet 34 and the connecting structure 322 can be connected by a plug-in connection, and the connection mode is not limited herein.

[0145] In an embodiment, the conductive layer 324 is arranged on the connecting structure 322. In this case, the connecting structure 322 can be made of plastic or other insulating material, or can be made of metal. The conductive layer 324 can be arranged on the surface of the connecting structure 322, or can be arranged in the connecting structure 322. For example, a conductive film can be arranged on the surface of the connecting structure 322 as the conductive layer, or a metal wire or a metal conductive sheet can be arranged in the connecting structure 322 made of plastic or other insulating material to form the conductive layer 324. It should be noted that in the present embodiment, the body part 321 can be made of insulating material, or can be made of conductive material such as metal. The lead part 331 of the voice coil 33 can extend to the connecting structure 322 and be electrically connected to the conductive layer 324. The connecting structure 322 and the lead part 331 can be connected by conductive glue 35 or by welding. Similarly, the centering sheet 34 and the connecting structure 322 can be connected by conductive glue 35 or by welding. Alternatively, the centering sheet 34 and the connecting structure 322 can be connected by a plug-in connection, and the connection mode is not limited herein.

[0146] Please refer to Figure 5In an embodiment, the conductive layer 324 is arranged on the outer surface of the framework 32; the conductive layer 324 can be arranged on the outer surface of the connecting structure 322, or arranged on the outer surface of the connecting structure 322 and at least part of the body portion 321; the framework 32 can be a metal structure or a plastic structure. Arranging the conductive layer 324 on the outer surface of the framework 32 can reduce the difficulty of arranging the conductive layer 324, and facilitate the electrical connection between the conductive layer 324 and the centering support 34 and the lead portion 331. When two conductive lines are arranged on the surface of a metal structure, an insulating layer needs to be arranged between the conductive layer 324 and the metal structure to avoid the short circuit caused by the electrical connection between the two conductive lines formed by the conductive layer 324 and the metal structure.

[0147] In an embodiment, at least part of the framework 32 is formed as a plastic structure, and the conductive layer 324 is formed as a conductive line layer injected into the plastic structure. The connecting structure 322 of the framework 32 can be arranged as a plastic structure, and the conductive layer 324 can be arranged on the connecting structure 322, or the entire framework 32 can be arranged as a plastic structure, and the conductive layer 324 can be arranged only on the connecting structure 322, or arranged on the body portion 321 and the connecting structure 322 respectively. Arranging the conductive layer 324 inside the plastic structure can avoid the problem of short circuit or poor conduction caused by the direct exposure of the conductive layer 324 to the outside, and can also avoid the problem of electric leakage, thereby improving the safety in use. The conductive structure can be arranged to extend from the surface of the framework 32 to the position of the conductive line layer, so that the lead portion 331 can be electrically connected to the conductive line layer through the conductive structure, and the centering support 34 can also be electrically connected to the conductive line layer through the conductive structure. For example, a through hole can be formed on the surface of the framework 32, a conductive coating can be arranged on the hole wall of the through hole, or a conductive material can be filled in the through hole, which is not limited here.

[0148] In an embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body, the voice coil body is connected to the framework 32, and the centering support 34 is provided with a conductive portion; the body portion 321 is an insulating material, and the connecting structure 322 is a metal structure, and the connecting structure 322 is electrically connected to the conductive portion and the lead portion 331 respectively.

[0149] In this embodiment, the connecting structure 322 is arranged as a metal structure, so that the connecting structure 322 can conduct electricity, and the two lead portions 331 of the voice coil 33 can be electrically connected to the two conductive portions of the centering support 34 through the two connecting structures 322 respectively, which is convenient for connection, and the connecting structure 322 is easy to manufacture. Arranging the body portion 321 as an insulating material can avoid the mutual conduction of the two connecting structures 322 connected to the body portion 321 through the body portion 321, thereby avoiding the problem of short circuit.

[0150] Please refer to Figure 19 and Figure 20 In an embodiment, the voice coil 33 comprises a voice coil body and a lead portion 331 connected with the voice coil body, the voice coil body is connected with the skeleton 32, and the centering branch 34 is provided with a conductive portion; the skeleton 32 comprises two component portions 326 made of metal material, at least part of the connecting structure 322 and the body portion 321 form the component portion 326, and the two component portions 326 are separately arranged, and each component portion 326 is electrically connected with the conductive portion and the lead portion 331 respectively.

[0151] In the embodiment, the body portion 321 comprises at least two separate pieces, and the two separate pieces are connected with the two connecting structures 322 one by one respectively, so as to form the two component portions 326; wherein, the separate pieces and the connecting structures 322 can be integrally formed, or can be separate structures connected with each other, and the separate pieces and the connecting structures 322 are made of metal material, and the separate pieces and the connecting structures 322 are in conduction with each other when being connected to form the component portion 326. The two lead portions 331 of the voice coil 33 are electrically connected with the centering branch 34 through the two component portions 326 respectively, so that the connection between the lead portion 331 and the centering branch 34 is more convenient, and it is not necessary to set a too long lead portion 331, so as to avoid the interference between the lead portion 331 and other structures. It should be noted that in the embodiment, the two component portions 326 can be bonded by insulating glue; or, the body portion 321 can further comprise an insulating portion, and the two component portions 326 are connected on the insulating portion respectively, so as to avoid the short circuit problem caused by the electrical connection between the two component portions 326.

[0152] Please refer to Figures 11 to 13 In an embodiment, the centering branch 34 is two, one of which is provided with two conductive portions; or, each of the centering branches 34 is provided with one conductive portion; the voice coil 33 comprises a voice coil body and two lead portions 331 connected with the voice coil body, the voice coil body is connected with the skeleton 32, and each lead portion 331 is electrically connected with one conductive portion.

[0153] In the embodiment, the vibration system 3 is provided with two centering branches 34, which are arranged on opposite sides of the skeleton 32, and can be connected end to end to form a ring structure, or can be arranged at intervals. The voice coil 33 is usually provided with two lead portions 331 corresponding to two electrodes; in the embodiment, the two centering branches 34 are respectively provided with conductive portions, so that the two lead portions 331 of the voice coil 33 are respectively and correspondingly electrically connected to the two conductive portions; or two independent conductive portions can be arranged on one centering branch 34, for example, the centering branch 34 can include an insulating body and two conductive portions, and the two conductive portions are respectively formed on different surfaces of the insulating body or are arranged at intervals on the same surface of the insulating body. In this way, the voice coil 33 can be electrically connected to the external circuit through the centering branch 34, improving the convenience of connecting the voice coil 33 to the external circuit. The electrical connection between the lead portion 331 and the conductive portion can be direct electrical connection, or the lead portion 331 and the conductive portion can be respectively electrically connected to the skeleton 32. For specific implementation, refer to the foregoing embodiment, which will not be repeated here.

[0154] Optionally, the two centering branches 34 are arranged at intervals, for example, the sound production device 100 has two opposite short sides and two opposite long sides, and the two centering branches 34 can be arranged on the two short sides or the two long sides, respectively. In this way, the vibration system 3 can be uniformly stressed, and the magnetic circuit system 2 can extend in the direction without the centering branch 34, thereby increasing the width dimension of the magnetic circuit system 2, which is beneficial to improving the magnetic field strength generated by the magnetic circuit system 2, thereby improving the BL value of the product and the acoustic performance of the product.

[0155] Please refer to Figure 1 In an embodiment, the housing 1 and the magnetic circuit system 2 define an accommodation space 233, the centering branch 34 includes a first connecting portion 341, an elastic portion 342, and a second connecting portion 343, the first connecting portion 341 is connected to the housing 1, the elastic portion 342 and the second connecting portion 343 are located in the accommodation space 233, and the skeleton 32 is connected to the second connecting portion 343.

[0156] In the embodiment, the magnetic circuit system 2 is spaced apart from the inner side wall of the shell 1 to form a containing space 233, and the centering sheet 34 is installed in the containing space 233, so that the magnetic circuit system 2 does not need to avoid the centering sheet 34 in the vibration direction of the vibration system 3, which is conducive to increasing the size of the magnetic circuit system 2 in the vibration direction of the vibration system 3 and improving the magnetic field strength, thereby increasing the BL value of the product. The centering sheet 34 includes a first connecting portion 341, an elastic portion 342, and a second connecting portion 343 connected with each other. The first connecting portion 341 is connected with the shell 1, the elastic portion 342 extends towards the magnetic circuit system 2, and the second connecting portion 343 is located at one end of the elastic portion 342 away from the first connecting portion 341 and is connected with the skeleton 32. The elastic portion 342 can be provided as a straight elastic cantilever or a bent elastic arm, so that the elastic portion 342 can produce bending deformation when the vibration system 3 vibrates.

[0157] Optionally, the elastic portion 342 includes two first elastic arms 3421, two second elastic arms 3422, and a third elastic arm 3423. One end of the first elastic arm 3421 is connected with the first connecting portion 341, the second elastic arm 3422 extends from the other end of the first elastic arm 3421 towards the first connecting portion 341, and the two ends of the third elastic arm 3423 are respectively connected with one end of the two second elastic arms 3422 close to the first connecting portion 341. The second connecting portion 343 is provided on the third elastic arm 3423.

[0158] Please refer to Figure 1 and Figure 3 In an embodiment, the centering sheet 34 is two, and the two centering sheets 34 are provided on opposite sides of the skeleton 32.

[0159] In the embodiment, the vibration system 3 includes two centering sheets 34 provided on the two sides of the skeleton 32, so that the skeleton 32 can be provided with support force on the two sides arranged opposite to each other, the vibration system 3 is uniformly stressed, and the position balance is maintained, so that the problem of partial vibration is avoided. In some embodiments, the centering sheet 34 is located in the containing space 233 defined by the shell 1 on the side of the magnetic circuit system 2, so that the magnetic circuit system 2 extends in the direction where the centering sheet 34 is not provided, thereby increasing the width size of the magnetic circuit system 2, which is conducive to improving the magnetic field strength generated by the magnetic circuit system 2, thereby improving the BL value of the product and the acoustic performance of the product.

[0160] Please refer to Figure 14 and Figure 15In an embodiment, the magnetic circuit system 2 further comprises a magnetic yoke 23, the magnetic yoke 23 comprises a main body portion 231 and a bent portion 232 arranged at the outer periphery of the main body portion 231, the central magnetic portion 21 and the side magnetic portion 22 are arranged at the side of the main body portion 231 opposite to the vibration system 3, the bent portion 232 is bent and extended towards the vibration system 3 relative to the main body portion 231, and the bent portion 232, the shell 1 and the side magnetic portion 22 jointly define a containing space 233 for arranging at least part of the centering sheet 34.

[0161] In the embodiment, the shell 1 has an opening at least at the side away from the vibration system 3, and the magnetic circuit system 2 further comprises a magnetic yoke 23 covering the opening, the magnetic yoke 23 comprises a main body portion 231 arranged at the side of the central magnetic portion 21 and the side magnetic portion 22 away from the vibration system 3, and a bent portion 232 bent relative to the main body portion 231, the bent portion 232 is extended from the main body portion 231 towards the vibration system 3 and is arranged opposite to the shell 1, and the end of the bent portion 232 away from the main body portion 231 is connected to the shell 1. The magnetic yoke 23 can be used to guide the transmission of magnetic induction lines, enclose the magnetic induction lines generated by the magnetic circuit system 2 inside the sound production device 100, reduce magnetic leakage, and increase the magnetic field strength acting on the voice coil 33, thereby facilitating the improvement of the BL value of the product and the improvement of the acoustic performance of the product.

[0162] In the embodiment, the shell 1 and the bent portion 232 are both arranged spaced apart from at least part of the side magnetic portion 22, so as to jointly define a containing space 233 by the bent portion 232, the shell 1 and the side magnetic portion 22, and at least part of the centering sheet 34 can be arranged in the containing space 233. For example, the edge of the centering sheet 34 can be connected between the bent portion 232 and the shell 1, and part of the centering sheet 34 can be arranged in the containing space 233 for connection with the skeleton 32; or the entire centering sheet 34 can be arranged in the containing space 233, which is not limited herein. The bent portion 232 can be arranged around the main body portion 231, or can be arranged only at part of the edge of the main body portion 231.

[0163] Please refer to Figure 14 and Figure 15 In an embodiment, the central magnetic portion 21 comprises a central magnet 211 and a central magnetic plate 212 arranged in layers, the central magnetic plate 212 is arranged at the side of the central magnet 211 facing the vibration system 3, and the central magnetic plate 212 is provided with a recessed area 213 corresponding to the first magnetic attraction portion 323 along the vibration direction of the vibration system 3. Part of the central magnetic plate 212 can be recessed to form the recessed area 213 in the direction away from the vibration system 3; or the recessed area 213 is a through hole structure penetrating through the central magnetic plate 212.

[0164] In the embodiment, the center magnetic part 21 comprises a center magnet 211 and a center magnetic conducting plate 212 which are arranged in layers, and the center magnetic conducting plate 212 is located on the side of the center magnet 211 facing the vibration system 3. The arrangement of the center magnetic conducting plate 212 can have a magnetic concentrating effect on the magnetic field lines on the side of the magnetic circuit system 2 facing the vibration system 3, so as to concentrate the magnetic field lines on the side of the vibration system 3, reduce magnetic leakage, and improve the magnetic field strength.

[0165] The surface of the center magnetic conducting plate 212 facing away from the vibration system 3 is provided with a recessed area 213, and the recessed area 213 is arranged correspondingly to the first magnetic attracting part 323, so as to reduce the influence of the magnetic concentrating effect of the center magnetic conducting plate 212 on the second magnetic force, thereby better increasing the magnetic attracting force between the first magnetic attracting part 323 and the center magnet 211. It can be understood that the arrangement of the recessed area 213 is also conducive to avoiding the recessed part 3211 arranged on the framework 32. The recessed area 213 can be a through hole or a notch structure penetrating through the center magnetic conducting plate 212. Of course, the recessed area 213 can also be a recessed groove structure formed by recessing the center magnetic conducting plate 212 in the direction away from the diaphragm 31, which is not limited here.

[0166] Alternatively, part of the center magnetic conducting plate 212 is recessed in the direction away from the diaphragm 31 to form the recessed area 213. Of course, in other embodiments, the recessed area 213 is a through hole structure penetrating through the center magnetic conducting plate 212. The center magnetic conducting plate 212 is arranged in an integral annular shape, so that the center of the center magnetic conducting plate 212 forms the recessed area 213. In other embodiments, the center magnetic conducting plate 212 comprises a plurality of center magnetic conducting plates 212, and the plurality of center magnetic conducting plates 212 are arranged in an annular shape to form the recessed area 213.

[0167] Please refer to Figure 3 , Figure 9 and Figure 13 In an embodiment, the first magnetic attracting part 323 is a magnetic conducting sheet 3231, and the material of the magnetic conducting sheet 3231 is SPCC or SUS430. The first magnetic attracting part 323 arranged as the magnetic conducting sheet 3231 can be pasted on the surface of the body part 321 of the framework 32. In some embodiments, the body part 321 is provided with a hollow hole 3212, and the framework 32 is provided with a ball top part 325 which is arranged in the hollow hole 3212. At this time, the magnetic conducting sheet 3231 can also be pasted on the surface of the ball top part 325, or the ball top part 325 can be arranged as the magnetic conducting sheet 3231 to serve as the first magnetic attracting part 323, which is not limited here.

[0168] Please refer to Figure 16 and Figure 17In an embodiment, the first magnetic attraction part 323 is formed as a magnetic material coating 3232 arranged on the surface of the framework 32. The magnetic material coating 3232 is a mixture of magnetic material particles and adhesive, and the magnetic material particles are at least one of iron powder, nickel powder, manganese-zinc ferrite powder, nickel-zinc ferrite powder, neodymium-iron-boron powder, aluminum-iron-boron powder, iron-silicon powder, and iron-silicon-aluminum powder. The magnetic material coating 3232 can be coated on the surface of the framework 32 facing the second magnetic attraction part 41, or on the surface of the framework 32 facing away from the second magnetic attraction part 41, or on both surfaces of the framework 32 facing the second magnetic attraction part 41 and facing away from the second magnetic attraction part 41. Similarly, the magnetic material coating 3232 can be arranged on the surface of the body part 321, or on the surface of the spherical top part 325, or on both surfaces of the body part 321 and the spherical top part 325.

[0169] Referring to Figure 14 and Figure 15 In an embodiment, at least part of the framework 32 is made of magnetic material to form the first magnetic attraction part 323. In this embodiment, the entire framework 32 can be made of magnetic material, or part or the entire body part 321 of the framework 32 can be made of magnetic material. When the framework 32 is provided with the spherical top part 325, the spherical top part 325 can be made of magnetic material, or the spherical top part 325 and at least part of the body part 321 can be made of magnetic material. In this way, the first magnetic attraction part 323 is formed during the preparation of the framework 32, and does not need to be additionally assembled, improving the convenience of assembly.

[0170] In an embodiment, the first magnetic attraction part 323 is embedded in the framework 32. The first magnetic attraction part 323 can be arranged in a mounting cavity inside the framework 32, or the first magnetic attraction part 323 can be arranged in a mold for forming the framework 32 during injection molding of the framework 32, so that the first magnetic attraction part 323 is naturally embedded in the framework 32 after the injection molding of the framework 32 is completed. In this way, the first magnetic attraction part 323 is protected from being exposed, reducing the risk of damage to the first magnetic attraction part 323.

[0171] Referring to Figure 1 In an embodiment, the first magnetic attraction part 323 is arranged on the surface of the framework 32 facing the second magnetic attraction part 41, and / or the first magnetic attraction part 323 is arranged on the surface of the framework 32 facing the magnetic circuit system 2.

[0172] In the embodiment, the first magnetic attraction part 323 can be arranged on the surface of the framework 32 facing the second magnetic attraction part 41, or on the surface of the framework 32 facing the magnetic circuit system 2; or both the surface of the framework 32 facing the second magnetic attraction part 41 and the surface of the framework 32 facing the magnetic circuit system 2 are provided with the first magnetic attraction part 323, which is not limited herein. Arranging the first magnetic attraction part 323 on the surface of the framework 32 makes the connection between the first magnetic attraction part 323 and the framework 32 more convenient and facilitates disassembly and assembly.

[0173] In some embodiments, the first magnetic attraction part 323 can be arranged on any surface of the framework 32 and the inner side of the framework 32.

[0174] In an embodiment, the second magnetic attraction part 41 is a magnet, the first magnetic attraction part 323 and the central magnetic part 21 have a second magnetic attraction, and the magnetization direction of the second magnetic attraction part 41 is opposite to that of the central magnetic part 21. In this way, the magnetic induction lines generated by the second magnetic attraction part 41 and the central magnetic part 21 are opposite in direction and repel each other, and the two magnetic induction lines cross the voice coil 33 transversely, thereby increasing the magnetic induction line intensity acting on the voice coil 33 and increasing the BL value of the product, and further improving the sound generation sensitivity of the sound generation device 100.

[0175] Please refer to Figure 1 In an embodiment, the second magnetic attraction part 41 is arranged on one side of the support 4 facing the first magnetic attraction part 323; and / or, the second magnetic attraction part 41 is arranged on one side of the support 4 away from the first magnetic attraction part 323; and / or, the support 4 is provided with a mounting cavity, and the second magnetic attraction part 41 is arranged in the mounting cavity.

[0176] It can be understood that the second magnetic attraction part 41 can be arranged on at least one side of the support 4, that is, the second magnetic attraction part 41 can be arranged on one side or opposite sides of the support 4. In the embodiment, the support 4 has an upper surface and a lower surface arranged opposite to each other, and the lower surface faces the diaphragm 31, at this time, the second magnetic attraction part 41 can be arranged on the upper surface; the second magnetic attraction part 41 can also be arranged on the lower surface; the second magnetic attraction part 41 can also be arranged on both the upper surface and the lower surface.

[0177] Of course, the second magnetic attraction part 41 can also be arranged in the support 4, that is, the second magnetic attraction part 41 is embedded in or injection molded in the support 4. In an embodiment, the support 4 is provided with a mounting cavity, and the second magnetic attraction part 41 is arranged in the mounting cavity.

[0178] In an embodiment, the second magnetic attraction part 41 is provided with at least two second magnetic attraction parts 41 arranged on the same side or different sides of the support 4.

[0179] In the embodiment, the second magnetic attraction part 41 can be provided in two, three, four or more. Among them, each second magnetic attraction part 41 can be provided on the same side of the support 4 at the same time; for example, a plurality of second magnetic attraction parts 41 can be provided on the upper surface, the lower surface of the support 4 or embedded in the support 4. Each second magnetic attraction part 41 can also be provided on different sides of the support 4, for example, two second magnetic attraction parts 41 can be provided on the upper surface and the lower surface of the support 4 respectively.

[0180] Optionally, when a plurality of second magnetic attraction parts 41 are provided on the same side of the support 4, the plurality of second magnetic attraction parts 41 are provided in a spliced manner. For example, two adjacent second magnetic attraction parts 41 in the plurality of second magnetic attraction parts 41 are provided in close contact, that is, without gaps. When a plurality of second magnetic attraction parts 41 are provided on the same side of the support 4, the plurality of second magnetic attraction parts 41 are provided in a spaced manner. For example, two adjacent second magnetic attraction parts 41 in the plurality of second magnetic attraction parts 41 have gaps therebetween.

[0181] In an embodiment, the second magnetic attraction part 41 is circular, elliptical or polygonal; that is, the shape of the second magnetic attraction part 41 can be circular, elliptical, triangular, square and other polygonal structures, which are not limited herein. In order to ensure the balance of the magnetic attraction force between the second magnetic attraction part 41 and the first magnetic attraction part 323, the structure of the second magnetic attraction part 41 can be selected as a symmetrical structure or a regular structure, which is not limited herein.

[0182] In an embodiment, the side of the support 4 facing the diaphragm 31 is provided with a mounting groove, and the second magnetic attraction part 41 is arranged in the mounting groove.

[0183] In the embodiment, the mounting groove can be a groove structure formed by concave in one side surface of the support 4, or a recess structure formed by the other side surface of the support 4 being recessed towards the one side surface, which is not limited herein. It can be understood that the mounting groove can be provided on the lower surface of the support 4. Of course, in other embodiments, the mounting groove can be provided on the upper surface of the support 4, which is not limited herein.

[0184] Please refer to Figures 1 to 3 In an embodiment, the sound generating device 100 is provided with a front cover 42, the front cover 42 is located on the side of the vibration system 3 away from the magnetic circuit system 2, the front cover 42 forms the support 4, and the outer edge of the diaphragm 31 is connected between the front cover 42 and the shell 1.

[0185] In the embodiment, the sound generating device 100 can be arranged in a communication terminal device such as a mobile phone, and the sound generating device 100 can be selected as a sound generating unit used as a receiver. The front cover 42 of the sound generating device 100 is arranged at least partially on the side of the vibration system 3 away from the magnetic circuit system 2, so that a vibration space is formed between the front cover 42 and the vibration system 3. The periphery of the front cover 42 is connected to the periphery of the vibration system 3. In order to facilitate smooth sound generation of the sound generating device 100, a sound hole 421 communicating with the vibration space can be arranged on the front cover 42. Alternatively, the sound hole 421 is arranged opposite the diaphragm 31. In order to avoid the influence of dust, water vapor and other impurities entering the vibration space through the sound hole 421 on the performance of the sound generating device 100, the sound generating device 100 further comprises a mesh cloth 5 covering the sound hole 421.

[0186] Meanwhile, the front cover 42 forms a support 4 for mounting the second magnetic attraction part 41. The second magnetic attraction part 41 can be arranged on the side of the front cover 42 facing the vibration system 3, or on the side of the front cover 42 away from the vibration system 3. Alternatively, the second magnetic attraction part 41 can be arranged in a mounting cavity formed in the interior of the front cover 42, which is not limited herein.

[0187] Please refer to Figure 6 and Figure 7 In an embodiment, the sound generating device 100 comprises a module shell 43, the module shell 43 comprises a module upper shell 431 and a module lower shell 432 which are covered with each other. The module upper shell 431 and the module lower shell 432 form an installation space 433. The magnetic circuit system 2 and the vibration system 3 are arranged in the installation space 433. The module upper shell 431 is arranged on the side of the vibration system 3 away from the magnetic circuit system 2. The module upper shell 431 forms the support 4. The second magnetic attraction part 41 is arranged on the module upper shell 431.

[0188] In the embodiment, the sound generating device 100 is provided with the module shell 43. The module shell 43 forms the installation space 433 for accommodating the magnetic circuit system 2, the vibration system 3 and other at least partial structures of the sound generating device 100, so that the sound generating device 100 can be applied as a sound generating device alone.

[0189] In the embodiment of the utility model, in order to facilitate the disassembly and assembly of each device in the module shell 43, the module shell 43 comprises a module upper shell 431 and a module lower shell 432 which are covered with each other. The module upper shell 431 and the module lower shell 432 are detachably connected. The module upper shell 431 is arranged on the side of the vibration system 3 away from the magnetic circuit system 2 and serves as the support 4 for fixing the second magnetic attraction part 41. The second magnetic attraction part 41 can be arranged on the side of the module upper shell 431 facing the diaphragm 31, or on the side of the module upper shell 431 away from the diaphragm 31. Alternatively, the second magnetic attraction part 41 can be arranged in a mounting cavity formed in the interior of the module upper shell 431, which is not limited herein.

[0190] In order to make the sound device 100 sound smoothly, the front sound cavity is formed between the module upper shell 431 and the vibration system 3, the module shell 43 is provided with a sound hole communicating the front sound cavity with the outside, the sound hole communicating the front sound cavity with the outside can be arranged on the module upper shell 431, or the module upper shell 431 and the module lower shell 432 are arranged at the part of the edge interval to form the sound hole, which is not limited here.

[0191] The utility model discloses still a kind of electronic equipment, and electronic equipment includes the sound device 100 in any of the preceding embodiments, the specific structure of the sound device 100 refers to the above-mentioned embodiment, since the present electronic equipment has adopted all technical solutions of the above-mentioned all embodiments, at least have all beneficial effects brought by the technical scheme of the above-mentioned embodiment, which will not be repeated here.

[0192] Electronic equipment can be mobile phone, MP3, MP4, tablet computer, earphone, wearable device etc., in electronic equipment, sound device 100 can be assembled into the shell of electronic equipment in the mode of module, also can be assembled into the shell of electronic equipment in the form of single body.

[0193] The above-mentioned is only the exemplary embodiment of the utility model, and not therefore limit the patent range of the utility model, all equivalent structural transformations made by using the utility model specification and drawing contents, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A sound producing device, characterized by, The application relates to a sound production device. The sound production device comprises a shell, a magnetic circuit system, a vibration system and a support. The magnetic circuit system comprises a center magnetic part and a side magnetic part which are arranged at intervals to form a magnetic gap. The vibration system is arranged on one side of the magnetic circuit system and comprises a diaphragm, a skeleton, a voice coil and a centering support. The outer edge of the diaphragm is connected with the shell, the inner edge of the diaphragm is connected with the skeleton, one end of the voice coil is connected with the skeleton, the other end of the voice coil is arranged in correspondence with the magnetic gap, the centering support is arranged opposite to the diaphragm at intervals, one end of the centering support is connected with the end of the skeleton which is away from the diaphragm, and the other end of the centering support is connected with the shell. The support is arranged on the side of the diaphragm which is away from the magnetic circuit system.

2. The sound production device of claim 1, wherein The skeleton is provided with a first magnetic attraction part, the support is provided with a second magnetic attraction part, the first magnetic attraction part and the second magnetic attraction part are arranged opposite to each other along the vibration direction of the vibration system, the first magnetic attraction part and the second magnetic attraction part have a first magnetic attraction force, the first magnetic attraction part and the magnetic circuit system have a second magnetic attraction force, and the vibration system is located at a balance position between the second magnetic attraction part and the magnetic circuit system under the action of the combined force of the first magnetic attraction force and the second magnetic attraction force in a non-working state.

3. The sound production device of claim 2, wherein The skeleton comprises a body part and at least two connecting structures. The body part is connected with the diaphragm, one end of the voice coil is connected with the body part, one end of the connecting structure is connected with the body part, and the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected with the centering support. The first magnetic attraction part is arranged on the body part. The body part and the connecting structure are integrally formed; or the body part and the connecting structure are separate structures which are connected with each other. The sound production device has two opposite short sides and two opposite long sides, the skeleton comprises two connecting structures which are arranged on the two short sides or the two long sides respectively.

4. The sound production device of claim 2, wherein The side of the body part which faces the second magnetic attraction part is provided with a recessed part which is recessed from the body part to the center magnetic part, and the first magnetic attraction part is arranged on the recessed part. The body part is provided with a hollow hole, the skeleton further comprises a spherical top part which is arranged on the body part and covers the hollow hole, and the first magnetic attraction part is arranged on the spherical top part.

5. The sound production device of claim 4, wherein Part of the body part is recessed and extended in a direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected with the connecting frame. The side magnetic part comprises a side magnet and a side magnetic conductive plate which are arranged in layers, and the side magnetic conductive plate is arranged on the side of the side magnet which faces the vibration system. The centering support is arranged on the side of the side magnetic conductive plate which is away from the diaphragm, at least part of the side magnetic conductive plate has a gap with the shell, and the connecting structure is arranged in the gap. The side magnetic conductive plate and the shell are integrally arranged; or the side magnetic conductive plate and the shell are separate structures which are connected with each other. And / or, the side magnetic guide plate is provided with a first avoiding opening towards the side of the gap; And / or, the edge of the side magnet is provided with a second avoiding opening for avoiding the connecting structure.

6. The sound production device of claim 2, wherein The voice coil includes a voice coil body and a lead part connected with the voice coil body, the voice coil body is connected with the skeleton, the connecting structure includes a first extension part and a second extension part, two ends of the first extension part are connected with the body part and the second extension part respectively, at least part of the first extension part extends along the vibration direction of the vibration system, the second extension part is arranged at an angle with the first extension part and is connected with the centering support piece; The lead part is arranged along the connecting structure, the lead part includes a first lead wire arranged along the first extension part and a second lead wire arranged along the second extension part, the centering support piece is provided with a conductive part, and the second lead wire is connected with the conductive part.

7. The sound production device of claim 2, wherein The voice coil includes a voice coil body and a lead part connected with the voice coil body, the voice coil body is connected with the skeleton, the skeleton further includes a conductive layer, the centering support piece is provided with a conductive part, and the lead part and the conductive part are respectively electrically connected with the conductive layer.

8. The sound production device of claim 7, wherein, The conductive layer is arranged on the connecting structure, or the conductive layer is respectively arranged on the body part and the connecting structure; And / or, the conductive layer is arranged on the outer surface of the skeleton; Or, at least part of the skeleton is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injected into the inside of the plastic structure.

9. The sound production device of claim 2, wherein, The voice coil includes a voice coil body and a lead part connected with the voice coil body, the voice coil body is connected with the skeleton, and the centering support piece is provided with a conductive part. The body part is an insulating material piece, the connecting structure is a metal piece, and the connecting structure is electrically connected with the conductive part and the lead part respectively; Or, the skeleton includes two component parts made of metal material, at least part of the connecting structure and part of the body part form the component parts, the two component parts are arranged separately, and each component part is electrically connected with the conductive part and the lead part respectively.

10. The sound production device of claim 1, wherein, The centering support piece is two, one of which is provided with two conductive parts; or each centering support piece is provided with one conductive part; The voice coil includes a voice coil body and two lead parts connected with the voice coil body, the voice coil body is connected with the skeleton, and each lead part is electrically connected with one conductive part.

11. The sound production device of claim 1, wherein, The housing and the magnetic circuit system define an accommodating space therebetween, the centering support piece includes a first connecting part, an elastic part and a second connecting part connected with each other, the first connecting part is connected with the housing, the elastic part and the second connecting part are located in the accommodating space, and the skeleton is connected with the second connecting part; And / or, the centering support piece is two, and the two centering support pieces are arranged on opposite sides of the skeleton.

12. The sound production device of claim 1, wherein, The magnetic circuit system further comprises a magnetic conductive yoke, the magnetic conductive yoke comprises a main body portion and a bent portion arranged at the outer periphery of the main body portion, the central magnetic portion and the edge magnetic portion are arranged on the side of the main body portion opposite to the vibration system, the bent portion is bent and extended towards the vibration system relative to the main body portion, and the bent portion, the shell and the edge magnetic portion jointly define a containing space for arranging at least part of the centering support sheet; And / or, the central magnetic portion comprises a central magnet and a central magnetic conductive plate arranged in layers, the central magnetic conductive plate is located on the side of the central magnet facing the vibration system, and the central magnetic conductive plate is provided with a recessed area corresponding to the first magnetic attraction portion along the vibration direction of the vibration system; Wherein, part of the central magnetic conductive plate is recessed to form the recessed area in the direction away from the vibration system; or, the recessed area is a through hole structure penetrating through the central magnetic conductive plate.

13. The sound production device of claim 1, wherein, The first magnetic attraction portion is a magnetic conductive sheet, and the material of the magnetic conductive sheet is SPCC or SUS430; And / or, the first magnetic attraction portion is formed as a magnetic material coating arranged on the surface of the framework; And / or, at least part of the framework is made of a magnetic conductive material to form the first magnetic attraction portion; And / or, the first magnetic attraction portion is embedded in the framework; And / or, the first magnetic attraction portion is arranged on the surface of the framework facing the second magnetic attraction portion; And / or, the first magnetic attraction portion is arranged on the surface of the framework facing the magnetic circuit system.

14. The sound production device of claim 1, wherein, The second magnetic attraction portion is a magnet, the first magnetic attraction portion and the central magnetic portion have the second attractive force, and the magnetization direction of the second magnetic attraction portion is opposite to that of the central magnetic portion; And / or, the second magnetic attraction portion is arranged on the side of the support facing the first magnetic attraction portion; And / or, the second magnetic attraction portion is arranged on the side of the support away from the first magnetic attraction portion; And / or, the support is provided with a mounting cavity, and the second magnetic attraction portion is arranged in the mounting cavity; And / or, the second magnetic attraction portion is circular, elliptical or polygonal; And / or, the support is provided with a mounting groove on the side facing the diaphragm, and the second magnetic attraction portion is arranged in the mounting groove; And / or, the second magnetic attraction portion is provided with at least two, and the at least two second magnetic attraction portions are arranged on the same side or different sides of the support.

15. A sound production device as claimed in any one of claims 1 to 14, characterized in that The sound generating device is provided with a front cover, the front cover is located on the side of the vibration system away from the magnetic circuit system, the front cover forms the support, and the outer edge of the diaphragm is connected between the front cover and the shell.

16. A sound production device as claimed in any one of claims 1 to 14, characterized in that The sound generating device comprises a module shell, the module shell comprises a module upper shell and a module lower shell which are overlapped with each other, the module upper shell and the module lower shell jointly define a mounting space, the magnetic circuit system and the vibration system are arranged in the mounting space, the module upper shell is located on the side of the vibration system away from the magnetic circuit system, the module upper shell forms the support, and the second magnetic attraction portion is arranged in the module upper shell.

17. An electronic device, comprising: The electronic device comprises the sound generating device as claimed in any one of claims 1 to 16.

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