Sound production module and electronic device

Abstract

The present invention relates to the technical field of electroacoustics. Disclosed are a sound production module and an electronic device. The sound production module comprises a shell and a sound production unit. The shell comprises a first module shell and a second module shell which are arranged in a first direction and define an accommodating cavity. The sound production unit comprises a magnetic circuit system and a vibration system. The magnetic circuit system comprises a plurality of magnetic circuit units distributed in a second direction. Each magnetic circuit unit comprises a first magnetic assembly and a second magnetic assembly which are spaced apart from each other in the first direction. The vibration system comprises a plurality of vibration units. Each magnetic circuit unit corresponds to a vibration unit. Each vibration unit is arranged between the first magnetic assembly and the second magnetic assembly of a corresponding magnetic circuit unit. A voice coil of each vibration unit comprises a first voice coil portion and a second voice coil portion which are located on two sides of a vibration plate in the first direction; the first voice coil portion is located in a first magnetic gap of the corresponding magnetic circuit unit; and the second voice coil portion is located in a second magnetic gap of the corresponding magnetic circuit unit. The sound production module of the present invention can be designed to be light and thin, and the call privacy is improved.

Description

Sound production module and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of electroacoustics, and in particular to a sound production module and an electronic device using the same. BACKGROUND

[0002] Currently, portable intelligent devices are increasingly thin and light, especially folding products. Therefore, there is an increasing demand for ultra-thin micro sound production modules, such as loudspeaker modules, in terminal devices.

[0003] A conventional DPS (Digital Signal Processing) loudspeaker integrates two sets of vibration systems together through a shared magnetic circuit. Both sets of vibration systems need to reserve upper vibration space and sound outlet pipelines at the end of the whole machine, and both sets of vibration systems have two sets of diaphragms. Each set of diaphragm needs two vibration spaces, i.e., upper vibration space and lower vibration space, and two sets of diaphragms need four vibration spaces, which occupies a large thickness space of the DPS product. When the thickness of the DPS product is reduced, in order to maintain the performance under the EQ (Equalizer) of the product, i.e., to maintain the product at low frequency, the input voltage of the loudspeaker is increased, the displacement of each frequency point of the loudspeaker is pushed to Xmax, so as to maximize the performance of the product. Therefore, the magnet, the dust cap, and the yoke in the magnetic circuit unit need to be thinned. However, the magnetic circuit unit that is too thin has a high fragmentation rate during transportation, cleaning, and magnetization, which leads to a sharp increase in material cost. In addition, because the magnet, the dust cap, and the yoke in the magnetic circuit unit are thinned to different degrees, the risk of damage to the product due to falling increases, and the reliability and yield of the product are also greatly reduced, which cannot complete mass production. SUMMARY

[0004] The main purpose of the present application is to provide a sound production module and an electronic device that can realize thin and light design and improve call privacy.

[0005] To achieve the above purpose, the present application provides a sound production module, which comprises:

[0006] A shell comprising a first module shell and a second module shell arranged along a first direction, the first module shell and the second module shell enclosing a containing cavity;

[0007] A sound production unit accommodated in the containing cavity and forming a front cavity and a rear cavity between the shell;

[0008] The sound production unit comprises:

[0009] A magnetic circuit system includes a plurality of magnetic circuit units distributed along a second direction, each of the magnetic circuit units including a first magnetic assembly and a second magnetic assembly spaced apart along a first direction, the second direction being perpendicular to the first direction, the first magnetic assembly having a first magnetic gap, and the second magnetic assembly having a second magnetic gap;

[0010] A vibration system includes a plurality of vibration units, each of the magnetic circuit units corresponding to one of the vibration units, each of the vibration units being disposed between the first magnetic assembly and the second magnetic assembly of the corresponding magnetic circuit unit, each of the vibration units including a diaphragm and a voice coil connected to the diaphragm, the diaphragm including a vibrating plate and a folded ring annularly arranged on the vibrating plate along the second direction, the voice coil including a first voice coil portion and a second voice coil portion located on both sides of the vibrating plate along the first direction, the first voice coil portion being located in the first magnetic gap of the corresponding magnetic circuit unit, and the second voice coil portion being located in the second magnetic gap of the corresponding magnetic circuit unit;

[0011] In a first working state, at least one of the vibration units radiates sound waves of a first phase outward, and the remaining at least one of the vibration units radiates sound waves of a second phase outward, the first phase and the second phase being opposite phases, and the housing is provided with sound holes corresponding to each of the vibration units, the sound holes being in communication with the front cavity, and the sound waves of each of the vibration units are radiated outward through the corresponding sound holes.

[0012] In an embodiment, in the first working state, two adjacent vibration assemblies respectively radiate sound waves of the first phase and the second phase outward, wherein each of the vibration assemblies includes one of the vibration units or a plurality of adjacent vibration units, and the number of the vibration units in the two adjacent vibration assemblies is the same or close.

[0013] In an embodiment, in a second working state, a plurality of the vibration units radiate sound waves of the same phase outward, wherein the second working state is different from the first working state.

[0014] In an embodiment, in each of the vibration units,

[0015] The first voice coil portion and the second voice coil portion are wound by the same wire, and the vibrating plate includes an inner vibrating plate connected to an inner wall of the voice coil and an outer vibrating plate connected to an outer wall of the voice coil.

[0016] Or, the first voice coil part and the second voice coil part are wound by the same wire, the vibrating plate comprises an inner vibrating plate connected with the inner wall of the voice coil and an outer vibrating plate connected with the outer wall of the voice coil, the inner vibrating plate comprises an inner flat plate part and an inner bending part bent and extended from the outer edge of the inner flat plate part and connected with the inner wall of the voice coil, and / or the outer vibrating plate comprises an outer flat plate part and an outer bending part bent and extended from the inner edge of the outer flat plate part and connected with the outer wall of the voice coil.

[0017] Or, the first voice coil part and the second voice coil part are wound by the same wire, the vibrating plate comprises an inner vibrating plate connected with the inner wall of the voice coil and an outer vibrating plate connected with the outer wall of the voice coil, the second voice coil part is connected with an external circuit on one side.

[0018] Or, the first voice coil part and the second voice coil part are wound by the same wire, the vibrating plate comprises an inner vibrating plate connected with the inner wall of the voice coil and an outer vibrating plate connected with the outer wall of the voice coil, the second voice coil part is connected with an external circuit on one side.

[0019] In an embodiment, in each of the vibration units, the bending ring comprises a first connecting part, a deformation part and a second connecting part connected in sequence along the second direction, the first connecting part is connected with the vibrating plate, the second connecting part is connected with the shell, and the deformation part is recessed towards the side where the second magnetic assembly is located.

[0020] Or, in each of the vibration units, the bending ring has a first end and a second end at two ends along the first direction, the first end is connected with the edge of the vibrating plate, the second end is connected with the shell or the second magnetic assembly, and the first end is arranged on the same side of the first magnetic assembly, and the second end is arranged on the same side of the second magnetic assembly.

[0021] In an embodiment, the first magnetic assembly comprises a first inner magnet and a first outer magnet arranged along the second direction, and the first magnetic gap is formed between the first inner magnet and the first outer magnet.

[0022] The second magnetic assembly comprises a second inner magnet and a second outer magnet arranged along the second direction, and the second magnetic gap is formed between the second inner magnet and the second outer magnet.

[0023] In an embodiment, in each of the magnetic circuit units,

[0024] The magnetic pole directions of the first inner magnet and the second inner magnet are opposite, the magnetic pole directions of the first outer magnet and the second outer magnet are opposite, and the magnetic pole directions of the first inner magnet and the first outer magnet are opposite.

[0025] And / or, the first magnetic gap and the second magnetic gap are arranged in alignment along the first direction.

[0026] And / or, the first outer magnet is a ring magnet.

[0027] And / or, the first inner magnet is arranged opposite to the second inner magnet, and the first outer magnet is arranged opposite to the second outer magnet.

[0028] In an embodiment, in each of the vibration units, a surface of the folded ring is provided with a conductive layer, the voice coil is electrically connected with the conductive layer, a conductive terminal is injection molded on the shell, and the conductive layer and the conductive terminal are connected through conductive glue, so that the voice coil is electrically connected with the conductive terminal through the conductive layer.

[0029] Alternatively, each of the vibration units further comprises a centering support sheet, the centering support sheet is a conductive centering support sheet, and the second voice coil part is connected with an external circuit through the centering support sheet.

[0030] In an embodiment, the first module shell comprises a first plastic shell and a first metal plate embedded in the first plastic shell, and the second module shell comprises a second plastic shell and a second metal plate embedded in the second plastic shell.

[0031] The sound generating monomer further comprises a shell, the shell has a plurality of accommodating spaces distributed along the second direction, each of the accommodating spaces accommodates one of the magnetic circuit units, the shell comprises a plastic support and the first metal plate and the second metal plate which are separately arranged on both sides of the plastic support along the first direction, the plastic support, the first metal plate and the second metal plate enclose to form the accommodating spaces, the first magnetic assembly is arranged on the first metal plate, and the second magnetic assembly is arranged on the second metal plate.

[0032] In an embodiment, the first metal plate and / or the second metal plate are made of a magnetic conductive material.

[0033] And / or, the sound outlet hole is located on the same side of the side wall of the shell.

[0034] In an embodiment, in each of the vibration units, the first voice coil part and the second voice coil part are wound by the same wire, the vibration plate comprises an inner vibration plate connected with the inner wall of the voice coil and an outer vibration plate connected with the outer wall of the voice coil, the magnetic pole directions of the first inner magnet and the second inner magnet are opposite, and the inner vibration plate has a magnetic conductive part.

[0035] In an embodiment, the inner vibration plate is a magnetic conductive plate, so as to form the magnetic conductive part.

[0036] Alternatively, a magnetic conductive part is embedded in the inner vibration plate, so as to form the magnetic conductive part.

[0037] Alternatively, the inner vibrating plate is provided with a magnetic conducting member on at least one side along the first direction to form the magnetic conducting part.

[0038] Alternatively, the inner vibrating plate is coated with a magnetic conducting material on at least one side surface along the first direction to form the magnetic conducting part.

[0039] In an embodiment, the back cavity is filled with sound absorbing material, the second module shell is provided with a filling opening for filling the sound absorbing material, and the second module shell is further provided with a damping member for covering the filling opening.

[0040] The application further provides an electronic device comprising a device shell and the sound production module as described above.

[0041] In the sound production module, each magnetic circuit unit comprises a first magnetic assembly and a second magnetic assembly arranged on the upper and lower sides of the vibrating unit, so that a double magnetic circuit design of the sound production unit is realized, the magnetic field distribution of the voice coil vibration area is uniform, a larger driving force that changes slowly and flatly with displacement can be provided for the voice coil, and the risk of distortion is reduced.

[0042] Furthermore, compared with the conventional DPS loudspeaker, the multiple magnetic circuit units and the multiple vibrating units in the sound production unit of the application are distributed along the horizontal direction, do not occupy too much space in the vertical thickness of the shell, and only require two vibration spaces, i.e., the upper vibration space and the lower vibration space, when all the vibrating units vibrate up and down, without occupying the thickness space of the sound production unit, which is beneficial to the realization of thin design.

[0043] Moreover, the first working state of the sound production module can be a receiver state, in which at least one vibrating unit radiates a first phase of sound waves outward, and the remaining at least one vibrating unit radiates a second phase of sound waves outward, the first phase and the second phase are opposite phases, can form a dipole effect, has the technical effect of far-field noise cancellation, and improves the call privacy. The sound waves of each vibrating unit are radiated outward through a sound outlet, i.e., each vibrating unit corresponds to a sound outlet and sounds from the corresponding sound outlet, and the sounds do not interfere with each other, improving the acoustic performance. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0045] Fig. 1 is an assembly schematic view of the sound production module of an embodiment of the application;

[0046] Figure 2 is a cross-sectional schematic diagram of a sound-generating module according to an embodiment of the present invention;

[0047] Figure 3 is an exploded view of a sound-generating module according to another embodiment of the present invention;

[0048] Figure 4 is a cross-sectional schematic diagram of a sound-emitting unit according to another embodiment of the present invention;

[0049] Figure 5 is an exploded view of a sound-emitting monomer according to an embodiment of the present invention;

[0050] Figure 6 is a cross-sectional schematic diagram of a sound-emitting unit according to another embodiment of the present invention;

[0051] Figure 7 is an exploded view of a sound-generating module according to another embodiment of the present invention;

[0052] Figure 8 is another cross-sectional schematic diagram of a sound-generating module according to an embodiment of the present invention;

[0053] Figure 9 is a schematic diagram of the magnetic field distribution of a sound-generating unit according to an embodiment of the present invention;

[0054] Figure 10 is a schematic diagram of the BL(x) curve of a sound-generating unit according to an embodiment of the present invention;

[0055] Figure 11 is a schematic diagram of the magnetization of the vibrating unit in a sound-generating unit according to an embodiment of the present invention;

[0056] Figure 12 is a cross-sectional schematic diagram of the voice coil and diaphragm in a sound-generating unit according to an embodiment of the present invention;

[0057] Figure 13 is a cross-sectional schematic diagram of the voice coil and diaphragm in a sound-generating unit according to another embodiment of the present invention;

[0058] Figure 14 is a cross-sectional schematic diagram of the voice coil and diaphragm in a sound-generating unit according to another embodiment of the present invention;

[0059] Figure 15 is a schematic diagram of the folded ring structure in a sound-generating monomer according to an embodiment of the present invention;

[0060] Figure 16 is a schematic diagram of the structure of the second support in the sound-generating unit of an embodiment of the present invention, which adopts an integrated design;

[0061] Figure 17 is a schematic diagram of the structure of the second support in the sound-generating unit of an embodiment of the present invention, which adopts a split design.

[0062] Figure 18 is a schematic diagram of the structure of the first module shell and the first bracket arriving together in a sound-generating module according to an embodiment of the present invention;

[0063] Figure 19 is a schematic diagram of the structure of the second module shell and the second bracket being supplied together in a sound-generating module according to an embodiment of the present invention;

[0064] Figure 20 is a cross-sectional schematic diagram of the inner vibrating plate and the magnetic conductive part in a sound-generating unit according to an embodiment of the present invention.

[0065] 100, sound emitting unit; 10, shell; 11, accommodating space; 12, conductive terminal; 13, plastic support; 131, first support; 132, second support; 14, first metal plate; 15, second metal plate; 20, magnetic circuit unit; 21, first magnetic assembly; 211, first magnetic gap; 212, first inner magnet; 213, first outer magnet; 22, second magnetic assembly; 221, second magnetic gap; 222, second inner magnet; 223, second outer magnet; 224, avoiding space; 30, vibration unit; 31, diaphragm; 311, vibration plate; 3111, inner vibration plate; 3112, outer vibration plate; 3113, magnetic conductive part; 3114, inner flat plate part; 3115, inner bending part; 3116, outer flat plate part; 3117, outer bending part; 312, folded ring; 3121, first end; 3122, second end; 3123, bending part; 3124, first connecting part; 3125, deformation part; 3126, second connecting part; 3127, conductive layer; 3128, conductive path; 313, waterproof film; 32, voice coil; 321, first voice coil part; 322, second voice coil part; 323, long axis side; 324, short axis side; 40, centering support; 41, inner fixing part; 42, elastic arm part; 43, outer fixing part; 200, sound emitting module; 50, shell; 51, accommodating cavity; 511, front cavity; 512, rear cavity; 52, first module shell; 53, second module shell; 54, sound outlet hole; 55, sound guide channel.

[0066] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0068] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0069] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0070] At present, portable intelligent devices are increasingly thin and light, especially folding products. Therefore, terminal devices have higher and higher requirements for ultra-thin micro sound generation modules, such as loudspeaker modules.

[0071] A conventional DPS (Digital Signal Processing) loudspeaker integrates two sets of vibration systems together through a shared magnetic circuit. Both sets of vibration systems need to reserve upper vibration space and sound outlet pipeline at the end of the whole machine, and both sets of vibration systems have two sets of diaphragms. Each set of diaphragm needs two vibration spaces, i.e., upper vibration space and lower vibration space, and two sets of diaphragms need four vibration spaces, which occupies a large thickness space of the DPS product. When the thickness of the DPS product is reduced, in order to maintain the performance under the EQ (Equalizer) of the product, i.e., to maintain the product at low frequency, increase the input voltage of the loudspeaker, push the displacement of each frequency point of the loudspeaker to Xmax, and thus maximize the performance of the product, a larger vibration space needs to be reserved in the product and at the end of the whole machine, so only the magnet, the dust cap, and the yoke in the magnetic circuit unit can be thinned. However, the fragmentation rate of the too-thin magnetic circuit unit is high during transportation, cleaning, and magnetization, which leads to a sharp increase in material cost. In addition, because the magnet, the dust cap, and the yoke in the magnetic circuit unit are thinned to different degrees, the risk of drop damage of the product is increased, and the reliability and yield of the product are also greatly reduced, which cannot complete mass production.

[0072] Therefore, it is necessary to provide a sound generation module and an electronic device to solve or at least alleviate the above technical problems.

[0073] As shown in FIGS. 1 to 8, the present application provides a sound generation module 200, which includes a shell 50 and a sound generation unit 100. The shell 50 includes a first module shell 52 and a second module shell 53 arranged along a first direction, and the first module shell 52 and the second module shell 53 form an accommodation cavity 51. The sound generation unit 100 is accommodated in the accommodation cavity 51 and forms a front cavity 511 and a rear cavity 512 between the sound generation unit 100 and the shell 50.

[0074] The sound emitting monomer 100 comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a plurality of magnetic circuit units 20 distributed along a second direction, each magnetic circuit unit 20 comprises a first magnetic assembly 21 and a second magnetic assembly 22 arranged at intervals along a first direction, the second direction is perpendicular to the first direction, the first magnetic assembly 21 has a first magnetic gap 211, and the second magnetic assembly 22 has a second magnetic gap 221; the vibration system comprises a plurality of vibration units 30, each magnetic circuit unit 20 corresponds to a vibration unit 30, each vibration unit 30 is arranged between the first magnetic assembly 21 and the second magnetic assembly 22 of the corresponding magnetic circuit unit 20, each vibration unit 30 comprises a diaphragm 31 and a voice coil 32 connected with the diaphragm 31, the diaphragm 31 comprises a vibration plate 311 and a folded ring 312 annularly arranged on the vibration plate 311 along the second direction, the voice coil 32 comprises a first voice coil 32 part and a second voice coil 32 part located on both sides of the vibration plate 311 along the first direction, the first voice coil 32 part is located in the first magnetic gap 211 of the corresponding magnetic circuit unit 20, and the second voice coil 32 part is located in the second magnetic gap 221 of the corresponding magnetic circuit unit 20.

[0075] In the first working state, at least one vibration unit 30 radiates sound waves of a first phase outward, and the remaining at least one vibration unit 30 radiates sound waves of a second phase outward, the first phase and the second phase are opposite phases, and the shell 50 is provided with a sound outlet hole 54 corresponding to the vibration unit 30, the sound outlet hole 54 communicates with the front cavity 511, and the sound waves of the vibration unit 30 are radiated outward through the corresponding sound outlet hole 54.

[0076] The sound emitting monomer 100 in the sound emitting module 200 can be a loudspeaker monomer, specifically a DPS loudspeaker monomer, and can be applied in the sound emitting module 200 of an electronic device, which can be a computer, a mobile phone, a tablet computer, a smart wearable device or the like. The embodiment takes the sound emitting module 200 as a loudspeaker module as an example for description.

[0077] The first direction is a vertical direction shown in FIGS. 2 and 8, which is an up-down direction, and the second direction is a horizontal direction shown in FIGS. 2 and 8, which is a left-right direction.

[0078] In an embodiment, the shell 50 is provided with a sound outlet hole 54, and the shell 50 comprises a first module shell 52 and a second module shell 53 arranged along the first direction, that is, the first module shell 52 and the second module shell 53 are arranged along the up-down direction, wherein the first module shell 52 is located on the upper side of the second module shell 53, and the first module shell 52 and the second module shell 53 enclose a containing cavity 51 to accommodate the sound emitting monomer 100, so that the structure is compact.

[0079] The sound production unit 100 is accommodated in the accommodating cavity 51, and forms a front cavity 511 and a rear cavity 512 between the sound production unit 100 and the shell 50. The sound hole 54 is in communication with the front cavity 511, and normal sound emission of the sound production module 200 is realized. Specifically, the shell 50 has a sound guide channel for each vibration unit 30 to radiate sound waves. The sound guide channel is in communication with the sound hole 54, so that the sound waves emitted by the vibration unit 30 can pass through the sound guide channel and the sound hole 54 to realize normal sound emission of the sound production module 200.

[0080] In the sound production unit 100, the magnetic circuit system includes a plurality of magnetic circuit units 20 distributed along the second direction, i.e., along the horizontal direction. Each magnetic circuit unit 20 corresponds to a vibration unit 30, so that the plurality of magnetic circuit units 20 and the plurality of vibration units 30 are distributed along the horizontal direction. Each magnetic circuit unit 20 includes a first magnetic assembly 21 and a second magnetic assembly 22. The first magnetic assembly 21 and the second magnetic assembly 22 are spaced apart along the up-down direction, and the vibration unit 30 is located between the first magnetic assembly 21 and the second magnetic assembly 22 of the corresponding magnetic circuit unit 20, i.e., the first magnetic assembly 21 and the second magnetic assembly 22 are located on the upper side and the lower side of the vibration unit 30, respectively. The first magnetic assembly 21 and the second magnetic assembly 22 provide driving force for the voice coil 32 of the corresponding vibration unit 30, so that the voice coil 32 vibrates along the first direction, and in turn drives the diaphragm 31 to vibrate along the first direction, realizing vibration sound production.

[0081] The diaphragm 31 includes a vibration plate 311 and a folded ring 312. The folded ring 312 is annularly arranged on the vibration plate 311 along the second direction, i.e., along the horizontal direction. The first voice coil 32 part and the second voice coil 32 part of the voice coil 32 are located on the upper side and the lower side of the vibration plate 311, respectively. The first voice coil 32 part is located in the first magnetic gap 211 of the corresponding magnetic circuit unit 20, and the second voice coil 32 part is located in the second magnetic gap 221 of the corresponding magnetic circuit unit 20. When the voice coil 32 is energized, the first voice coil 32 part and the second voice coil 32 part move reciprocally in the first magnetic gap 211 and the second magnetic gap 221, respectively, to cut the magnetic force lines, drive the diaphragm 31 to vibrate up and down, and in turn drive the air to produce sound, thereby completing the energy conversion between electricity and sound.

[0082] As shown in FIG. 9, in the sound production module 200 of the present application, each magnetic circuit unit 20 includes a first magnetic assembly 21 and a second magnetic assembly 22 arranged on the upper side and the lower side of the vibration unit 30, respectively, thereby realizing a double magnetic circuit design of the sound production module 200. The magnetic field distribution in the vibration region of the voice coil 32 is uniform, and a larger driving force that changes slowly and smoothly with displacement can be provided for the voice coil 32, as shown in the BL(x) curve in FIG. 10, thereby reducing the risk of distortion.

[0083] As shown in FIG. 10, the BL curve is completely symmetrical left and right, and the BL at the Xmax position (the maximum displacement of the voice coil 32) is attenuated within 10% compared to the balanced position, thereby achieving a super-linear BL(x) design. Understandably, the horizontal axis shown in FIG. 10 represents displacement in mm, and the vertical axis represents BL in Wb / m.

[0084] Further, compared with the conventional DPS loudspeaker, the plurality of magnetic circuit units 20 and the plurality of vibration units 30 in the sound production module 200 of the present application are distributed in the horizontal direction, and do not occupy too much space in the vertical thickness of the shell 10. When all the vibration units 30 vibrate up and down, only two vibration spaces, i.e., the upper vibration space and the lower vibration space, are needed, and no additional thickness space of the sound production module 200 is occupied, which is beneficial to realize thin design. Therefore, under the same thickness, the sound production module 200 of the present application can thicken the design of the magnetic circuit unit 20, maximize the use of product and machine thickness space, improve the strength of the magnetic circuit unit 20, and reduce the risk of fragmentation and drop damage, thereby reducing material cost, improving product reliability and yield, and realizing mass production.

[0085] Further, the first working state of the sound production module 200 can be a receiver state (RCV state). In the receiver state, at least one vibration unit 30 radiates a first phase of sound waves outward, and the remaining at least one vibration unit 30 radiates a second phase of sound waves outward. The first phase and the second phase are opposite phases, which can form a dipole effect and have the technical effect of far-field noise reduction, thereby improving call privacy.

[0086] Further, in the first working state, two adjacent vibration assemblies radiate the first phase and the second phase of sound waves outward, respectively. Each vibration assembly includes one vibration unit 30 or a plurality of adjacent vibration units 30, and the number of vibration units 30 in the two adjacent vibration assemblies is the same or close.

[0087] Specifically, the plurality of vibration units 30 are divided into different vibration assemblies, and the number of vibration assemblies is at least two. Each vibration assembly includes one vibration unit 30 or a plurality of adjacent vibration units 30. The number of vibration units 30 in the two adjacent vibration assemblies is the same or close. Understandably, the number of vibration units 30 in the two adjacent vibration assemblies close means that the difference between the number of vibration units 30 in the two vibration assemblies is equal to one or two. In summary, the difference between the number of vibration units 30 in the two adjacent vibration assemblies is not too large, which avoids affecting call privacy due to the imbalance in the number of vibration units 30 radiating opposite phases outward.

[0088] For convenience of description, the first phase is represented by “+”, and the second phase is represented by “-”.

[0089] In the receiver state, the number of vibration units 30 is two, and the radiation modes are + and - respectively;

[0090] When the number of vibration units 30 is three, the radiation modes are +, +, - / +,-, - / +,-, + / -, +, - respectively;

[0091] When the number of vibration units 30 is four, the radiation modes are +, +, -, - / +,-, +, - and the like respectively;

[0092] When the number of vibration units 30 is five, the radiation modes are +, +, +, -, - / +,+,-, + / +,-, +, - and the like respectively;

[0093] When the number of vibration units 30 is six, the radiation modes are +, +, +, -, -, - / +,+,-, + / +,-, +, - and the like respectively.

[0094] By analogy, the phase modes of the multiple vibration units 30 radiating sound waves outward can be diversified and flexible, meeting various requirements.

[0095] In an embodiment, in the second working state, the multiple vibration units 30 radiate sound waves outward in the same phase, and the second working state is different from the first working state.

[0096] Specifically, the second working state of the sound production monomer 100 can be a speaker state (SPK state), in which all the vibration units 30 radiate sound waves outward in the same phase. The sound waves in the same phase can superimpose the sound waves, improve the playback effect, and widen the sound playback frequency band.

[0097] As shown in FIGS. 2, 4-8 and 13-14, in an embodiment, in each vibration unit 30, the first voice coil 32 part and the second voice coil 32 part are wound by the same wire, and the vibration plate 311 includes an inner vibration plate 3111 connected with the inner wall of the voice coil 32 and an outer vibration plate 3112 connected with the outer wall of the voice coil 32; in this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed in one body and wound by the same wire, which is a single voice coil 32 design, simple and convenient. The vibration plate 311 is separated into the inner vibration plate 3111 and the outer vibration plate 3112 by the voice coil 32, wherein the inner vibration plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibration plate 3112 is connected with the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31.

[0098] As shown in FIG. 2, FIG. 4, FIG. 6, FIG. 8, FIG. 14, the first voice coil 32 part and the second voice coil 32 part are wound by the same wire, the vibrating plate 311 includes the inner vibrating plate 3111 connected with the inner wall of the voice coil 32 and the outer vibrating plate 3112 connected with the outer wall of the voice coil 32, the inner vibrating plate 3111 includes the inner flat plate part 3114 and the inner bending part extended by the outer edge of the inner flat plate part 3114 and connected with the inner wall of the voice coil 32, and / or, the outer vibrating plate 3112 includes the outer flat plate part 3116 and the outer bending part extended by the inner edge of the outer flat plate part 3116 and connected with the outer wall of the voice coil 32. In this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed as one body and wound by the same wire, which is a single voice coil 32 design, simple and convenient. The vibrating plate 311 is separated into the inner vibrating plate 3111 and the outer vibrating plate 3112 by the voice coil 32, wherein the inner vibrating plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibrating plate 3112 is connected with the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31.

[0099] The inner vibrating plate 3111 includes the inner flat plate part 3114 and the inner bending part 31153123, the inner bending part 31153123 is extended by the outer edge of the inner flat plate part 3114 along the first direction, i.e. along the vertical direction, expanding the connection area between the inner vibrating plate 3111 and the inner wall of the voice coil 32, improving the assembly stability of the inner vibrating plate 3111 and the voice coil 32. The outer vibrating plate 3112 includes the outer flat plate part 3116 and the outer bending part, the outer bending part is extended by the inner edge of the outer flat plate part 3116 along the first direction, i.e. along the vertical direction, expanding the connection area between the outer vibrating plate 3112 and the outer wall of the voice coil 32, improving the assembly stability of the outer vibrating plate 3112 and the voice coil 32.

[0100] Alternatively, the first voice coil 32 part and the second voice coil 32 part are wound by the same wire, the vibrating plate 311 includes the inner vibrating plate 3111 connected with the inner wall of the voice coil 32 and the outer vibrating plate 3112 connected with the outer wall of the voice coil 32, and one side of the second voice coil 32 part is connected with the external circuit. In this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed as one body and wound by the same wire, which is a single voice coil 32 design, simple and convenient. The vibrating plate 311 is separated into the inner vibrating plate 3111 and the outer vibrating plate 3112 by the voice coil 32, wherein the inner vibrating plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibrating plate 3112 is connected with the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31. Moreover, one side of the second voice coil 32 part is connected with the external circuit, realizing the conduction of the voice coil 32 and the external circuit.

[0101] As shown in FIG. 3, FIG. 11 and FIG. 12, in another embodiment, the first voice coil 32 part and the second voice coil 32 part are respectively formed by winding different wires independently. In this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed in a split type, respectively formed by winding different wires independently, designed as a double voice coil 32, and the vibrating plate 311 is not separated by the voice coil 32, and the vibrating plate 311 is a one-piece vibrating plate 311.

[0102] As shown in FIG. 4, in other embodiments, in each of the vibrating units 30, the first voice coil 32 part and the second voice coil 32 part are formed by winding the same wire, the vibrating plate 311 includes an inner vibrating plate 3111 connected with the inner wall of the voice coil 32 and an outer vibrating plate 3112 connected with the outer wall of the voice coil 32, and the diaphragm 31 further includes a waterproof film 313, the waterproof film 313 is connected between the inner vibrating plate 3111 and the outer vibrating plate 3112, and the waterproof film 313 is attached to and wrapped around one end of the second voice coil 32 part facing the second magnetic assembly 22.

[0103] In this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed in a one-piece type, formed by winding the same wire, designed as a single voice coil 32, and simple and convenient. The vibrating plate 311 is separated by the voice coil 32 into the inner vibrating plate 3111 and the outer vibrating plate 3112, wherein the inner vibrating plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibrating plate 3112 is connected with the outer wall of the voice coil 32, to realize the assembly of the voice coil 32 and the diaphragm 31.

[0104] Moreover, the diaphragm 31 further includes a waterproof film 313, the waterproof film 313 is connected between the inner vibrating plate 3111 and the outer vibrating plate 3112, and the waterproof film 313 is attached to the upper end of the second voice coil 32 part, to play a waterproof role and improve the waterproof performance and level of the sound production unit 100.

[0105] The voice coil 32 of the present application can be designed flexibly according to actual needs, designed as a single voice coil 32 or a double voice coil 32. As shown in FIG. 2 to FIG. 7 and FIG. 12 to FIG. 15, in adjacent two vibrating units 30, the two folded rings 312 are connected with each other as a whole, to facilitate the manufacturing.

[0106] As shown in FIG. 8, in an embodiment, in each of the vibrating units 30, the folded ring 312 includes a first connecting part 3124, a deformation part 3125 and a second connecting part 3126 connected in sequence along the second direction, the first connecting part 3124 connects the vibrating plate 311, the second connecting part 3126 connects the shell 10, and the deformation part 3125 is recessed towards the side where the second magnetic assembly 22 is located.

[0107] In this embodiment, the folded ring 312 is a horizontal folded ring 312, and the folded ring 312 comprises a first connecting portion 3124, a deformation portion 3125 and a second connecting portion 3126 connected in sequence in the horizontal direction, wherein the first connecting portion 3124 is connected to the vibrating plate 311, and the second connecting portion 3126 is connected to the shell 10 to realize the assembly with the shell 10. The deformation portion 3125 is arranged in a downward concave manner, which is beneficial to support and guide the vertical vibration of the diaphragm 31. The folded ring 312 is designed as a horizontal folded ring 312, which has a simple structure and can better guide the up-and-down movement of the diaphragm 31, maintain the linearity of vibration, reduce the off-axis deviation, and further reduce distortion.

[0108] As shown in FIG. 6, in another embodiment, in each vibration unit 30, the two ends of the folded ring 312 in the first direction are a first end 3121 and a second end 3122, respectively, the first end 3121 is connected to the edge of the vibrating plate 311, and the second end 3122 is connected to the shell 10 or the second magnetic assembly 22, and the first end 3121 is arranged on the same side as the first magnetic assembly 21, and the second end 3122 is arranged on the same side as the second magnetic assembly 22.

[0109] Specifically, the two ends of the folded ring 312 in the up-and-down direction are a first end 3121 and a second end 3122, respectively, wherein the first end 3121 is connected to the vibrating plate 311, and the second end 3122 is connected to the shell 10 or the second magnetic assembly 22, and the first end 3121 is arranged on the same side as the first magnetic assembly 21, and the second end 3122 is arranged on the same side as the second magnetic assembly 22, so that the folded ring 312 has a certain height in the vertical direction, that is, the folded ring 312 is a vertical folded ring 312 which has a certain extension in the vertical direction, which reduces the occupation space of the folded ring 312 in the horizontal direction, expands the size of the vibrating plate 311 in the horizontal direction of the sound emitting unit 100, improves the effective vibration area (SD) of the sound emitting unit 100, improves the sensitivity of the sound emitting unit 100, and improves the mid-frequency performance of the product, so that the mid-frequency performance of the product is optimized.

[0110] As shown in FIG. 6, in an embodiment, the folded ring 312 comprises a plurality of bending portions 3123 connected in sequence in the first direction, each bending portion 3123 is bent towards the second direction, and the bending directions of any two adjacent bending portions 3123 are opposite, so that the folded ring 312 forms a wave-shaped bending structure, and the two bending portions 3123 located at the outermost sides in the first direction form the first end 3121 and the second end 3122, respectively.

[0111] Specifically, the folded ring 312 comprises a plurality of bending portions 3123 connected in sequence along the up-down direction, each bending portion 3123 is bent towards the horizontal direction, and the bending directions of any two adjacent bending portions 3123 are opposite, so that the folded ring 312 forms a wave-shaped bending structure, wherein the two bending portions 3123 located at the outermost sides along the first direction form the first end 3121 and the second end 3122 respectively, i.e., the bending portion 3123 located at the uppermost side and the bending portion 3123 located at the lowermost side form the first end 3121 and the second end 3122 respectively. The folded ring 312 is designed as a wave-shaped bending structure arranged along the vertical direction and bent multiple times along the horizontal direction, which improves the ductility of the folded ring 312, further reduces the occupied space of the folded ring 312 in the horizontal direction, thereby further expanding the size of the vibrating plate 311 in the horizontal direction of the sound production unit 100, and more greatly improving the effective vibration area of the sound production unit 100, further improving the sensitivity of the sound production unit 100 and optimizing the mid-frequency performance.

[0112] Each bending portion 3123 is an arc-shaped bending portion 3123, and any two adjacent bending portions 3123 are smoothly and continuously connected, which improves the smoothness and continuity of the folded ring 312, avoids stress concentration, and is more conducive to improving the ductility of the folded ring 312.

[0113] In an embodiment, the folded ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic assembly 22, and the second end 3122 surrounds the second magnetic assembly 22. As shown in FIG. 6, the folded ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic assembly 22, i.e., the folded ring 312 is connected to the lower side of the vibrating plate 311, and the second end 3122 surrounds the outside of the second magnetic assembly 22, which is a reasonable structure design.

[0114] In an embodiment, the profile size of the second end 3122 projected along the first direction is greater than the profile size of the first end 3121 projected along the first direction, i.e., the profile size of the second end 3122 projected along the up-down direction on the horizontal plane is greater than the profile size of the first end 3121 projected on the horizontal plane. The first end 3121 and the second end 3122 are both arranged in a ring shape, and the outer profile size of the second end 3122 is increased relative to the first end 3121, which further improves the ductility of the folded ring 312, reduces the occupied space of the folded ring 312 in the horizontal direction, expands the size of the vibrating plate 311 in the horizontal direction of the sound production unit 100, thereby improving the effective vibration area of the sound production unit 100, and at the same time improving the ductility of the folded ring 312.

[0115] In an embodiment, the outer edge of the vibrating plate 311 is projected in the first direction to be located outside the projection of the second magnetic assembly 22 in the first direction, i.e., the outer edge of the vibrating plate 311 is projected on the horizontal plane to be located outside the projection of the second magnetic assembly 22 on the horizontal plane, so that the outer contour size of the vibrating plate 311 is larger, and the effective vibrating area of the sound production unit 100 is improved.

[0116] In an embodiment, the outer edge of the vibrating plate 311 is projected in the first direction to be located outside the projection of the first magnetic assembly in the first direction, i.e., the outer edge of the vibrating plate 311 is projected on the horizontal plane to be located outside the projection of the first magnetic assembly 21 on the horizontal plane, so that the outer contour size of the vibrating plate 311 is larger, and the effective vibrating area of the sound production unit 100 is improved.

[0117] In an embodiment, the vibrating plate 311 is bent to extend in the form of a slope structure near the outer edge thereof in a direction close to the first magnetic assembly 21, and the first magnetic assembly 21 is provided with a avoiding portion for avoiding the slope structure. Specifically, the vibrating plate 311 is bent to extend in the form of a slope structure near the outer edge thereof upward, and the avoiding portion of the first magnetic assembly 21 can avoid the slope structure, preventing the first magnetic assembly 21 from interfering with the vibrating plate 311.

[0118] As shown in FIGS. 2-9 and 11, in an embodiment, the first magnetic assembly 21 includes a first inner magnet 212 and a first outer magnet 213 arranged in the second direction, and a first magnetic gap 211 is formed between the first inner magnet 212 and the first outer magnet 213. Magnetic field lines can be generated between the first inner magnet 212 and the first outer magnet 213 to pass through the first magnetic gap 211, so that the first voice coil 32 part is vibrated up and down to cut the magnetic field lines when the first voice coil 32 part is energized.

[0119] The second magnetic assembly 22 includes a second inner magnet 222 and a second outer magnet 223 arranged in the second direction, and a second magnetic gap 221 is formed between the second inner magnet 222 and the second outer magnet 223. Magnetic field lines can be generated between the second inner magnet 222 and the second outer magnet 223 to pass through the second magnetic gap 221, so that the second voice coil 32 part is vibrated up and down to cut the magnetic field lines when the second voice coil 32 part is energized.

[0120] In an embodiment, in each magnetic circuit unit 20, the magnetic pole directions of the first inner magnet 212 and the second inner magnet 222 are opposite, the magnetic pole directions of the first outer magnet 213 and the second outer magnet 223 are opposite, and the magnetic pole directions of the first inner magnet 212 and the first outer magnet 213 are opposite. In this way, the magnetic lines of force generated by the first outer magnet 213 and the first inner magnet 212 form a ring-shaped closed magnetic loop, and the magnetic lines of force generated by the second outer magnet 223 and the second inner magnet 222 also form a ring-shaped closed magnetic loop, so that more and more dense magnetic lines of force pass through the voice coil 32, and the driving force is greater.

[0121] In an embodiment, the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment along the first direction, so that the first voice coil 32 part and the second voice coil 32 part respectively located in the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment, vibration consistency is improved, and deviation is avoided.

[0122] In an embodiment, the first outer magnet 213 is a ring-shaped magnet, which has good continuity and is beneficial to improving the uniformity of the magnetic field distribution.

[0123] The first inner magnet 212 is arranged opposite to the second inner magnet 222, and the first outer magnet 213 is arranged opposite to the second outer magnet 223, which is beneficial to the alignment arrangement of the first magnetic gap 211 and the second magnetic gap 221, so that the first voice coil 32 part and the second voice coil 32 part respectively located in the first magnetic gap 211 and the second magnetic gap 221 are arranged in alignment, vibration consistency is improved, and deviation is avoided.

[0124] In an embodiment, the size of the first inner magnet 212 along the second direction is the same as the size of the second inner magnet 222 along the second direction, and the size of the first outer magnet 213 along the second direction is smaller than the size of the second outer magnet 223 along the second direction. Specifically, the first inner magnet 212 and the second inner magnet 222 are matched in shape, and the size of the first inner magnet 212 in the horizontal direction is the same as the size of the second inner magnet 222 in the horizontal direction, which is beneficial to improving the uniformity of the magnetic field distribution. Further, the size of the first outer magnet 213 in the horizontal direction is smaller than the size of the second outer magnet 223 in the horizontal direction, that is, the outer edge size of the first outer magnet 213 is smaller than the outer edge size of the second outer magnet 223. Compared with the second outer magnet 223, the outer edge of the first outer magnet 213 is designed to be narrowed, so as to avoid interference between the first outer magnet 213 and the diaphragm 31.

[0125] As shown in FIG. 15, in an embodiment, in each vibration unit 30, the surface of the folded ring 312 is provided with a conductive layer 3127, the voice coil 32 is electrically connected with the conductive layer 3127, the conductive terminal 12 is injection molded on the shell 10, and the conductive layer 3127 and the conductive terminal 12 are connected through conductive glue, so that the voice coil 32 is electrically connected with the conductive terminal 12 through the conductive layer 3127.

[0126] Specifically, the folding ring 312 is provided with a conductive layer 3127 on the side surface of the second voice coil 32 part, i.e. the lower side surface of the folding ring 312 is provided with the conductive layer 3127, the second voice coil 32 part is connected with the conductive layer 3127, and the conductive layer 3127 is connected with the conductive terminal 12 on the shell 10 through conductive glue, the conductive terminal 12 is electrically connected with the external circuit, so that the second voice coil 32 part is electrically connected with the external circuit through the conductive layer 3127, realizing the conduction between the second voice coil 32 part and the external circuit. The conductive terminal 12 is injection molded on the shell 10, improving the integration and compactness of the shell 10. And the conductive layer 3127 on the surface of the folding ring 312 forms a conductive path 3128, so that the folding ring 312 also has electrical conductivity, and the structure is highly integrated.

[0127] In another embodiment, each of the vibration units 30 further comprises a centering support sheet 40, which is an electrically conductive centering support sheet 40, and the second voice coil 32 part is connected with the external circuit through the centering support sheet 40.

[0128] As shown in FIGS. 4-7, the centering support sheet 40 is arranged at the end of the second voice coil 32 part away from the diaphragm 31, i.e. the centering support sheet 40 is arranged at the bottom end of the second voice coil 32 part, and the centering support sheet 40 comprises an inner fixing part 41, a spring arm part 42 and an outer fixing part 43, wherein the inner fixing part 41, the spring arm part 42 and the outer fixing part 43 are sequentially connected from inside to outside along the second direction, i.e. the horizontal direction, the outer fixing part 43 is connected with the shell 10, and the inner fixing part 41 is connected with the second voice coil 32 part, the spring arm part 42 connects the inner fixing part 41 and the outer fixing part 43, and the spring arm part 42 has elasticity, so that the inner fixing part 41 can vibrate with the second voice coil 32 part. The centering support sheet 40 plays a role in centering and supporting the voice coil 32, preventing the voice coil 32 from being polarized, and improving the vibration stability of the voice coil 32. The second magnetic assembly 22 has an avoiding space 224 which can avoid the corresponding centering support sheet 40, specifically the spring arm part 42 of the centering support sheet 40, and the layout is reasonable, and the centering support sheet 40 does not interfere with the magnetic circuit unit 20. Moreover, one side of the second voice coil 32 part is connected with the external circuit, realizing the conduction between the voice coil 32 and the external circuit.

[0129] Moreover, in each of the vibration units 30, the centering support sheet 40 is an electrically conductive centering support sheet 40, and the second voice coil 32 part is connected with the external circuit through the centering support sheet 40, thereby realizing the conduction between the second voice coil 32 part and the external circuit. And the centering support sheet 40 can be conductive, and the setting of other conductive parts is omitted, the degree of integration is high, and the structure is simplified.

[0130] As shown in FIG. 2 and FIG. 3, the sound production unit 100 further comprises a shell 10 having a plurality of accommodating spaces 11 distributed along a second direction, each of the accommodating spaces 11 corresponding to a magnetic circuit unit 20 accommodated therein, the shell 10 comprising a plastic support 13 and a first metal plate 14 and a second metal plate 15 separately arranged on two sides of the plastic support 13 along a first direction, the plastic support 13, the first metal plate 14 and the second metal plate 15 enclosing the accommodating space 11, a first magnetic assembly 21 arranged on the first metal plate 14, and a second magnetic assembly 22 arranged on the second metal plate 15. The first metal plate 14 is embedded in a first module shell 52, and the second metal plate 15 is embedded in a second module shell 53.

[0131] The shell 10 of the sound production unit 100 has a plurality of accommodating spaces 11 distributed along a second direction, i.e., a horizontal direction, each of the accommodating spaces 11 corresponding to a magnetic circuit unit 20 and a vibration unit 30 accommodated therein, so that the plurality of magnetic circuit units 20 and the plurality of vibration units 30 are distributed along the horizontal direction.

[0132] Specifically, the first metal plate 14 and the second metal plate 15 are separately arranged on the upper and lower sides of the plastic support 13, and the plastic support 13, the first metal plate 14 and the second metal plate 15 of the shell 10 enclose the accommodating space 11, which is a reasonable structural design. Moreover, the first magnetic assembly 21 is arranged on the first metal plate 14, and the second magnetic assembly 22 is arranged on the second metal plate 15, which realizes the assembly between the shell 10 and the magnetic circuit unit 20. Furthermore, the plastic support 13 is injection molded with a conductive terminal 12, which improves the integration and compactness of the plastic support 13.

[0133] The first module shell 52 and the second module shell 53 can both be plastic shells, the first metal plate 14 is embedded in the first module shell 52, and the second metal plate 15 is embedded in the second module shell 53, which is a compact structure.

[0134] During the assembly of the sound production module 200, the first module shell 52 can be integrated with the first support 131, and the second module shell 53 can be integrated with the second support 132, which improves the assembly efficiency and convenience.

[0135] Further, the first metal plate 14 and / or the second metal plate 15 are made of a magnetic conductive material, so that the first metal plate 14 and / or the second metal plate 15 have magnetic conductive ability, which is beneficial to the correction of magnetic lines.

[0136] As shown in FIG. 2, FIG. 3, FIG. 5 and FIG. 7, in an embodiment, the plastic support 13 comprises a first support 131 and a second support 132, which are designed separately in a first direction, i.e. in the up-down direction, facilitating disassembly. The first support 131, the second support 132, the first metal plate 14 and the second metal plate 15 enclose the accommodating space 11, the first support 131 surrounds the first magnetic assembly 21, the second support 132 surrounds the second magnetic assembly 22, and the second support 132 is injection molded with the conductive terminal 12, which is a reasonable structure design.

[0137] In an embodiment, the sound outlets 54 are located on the same side of the side wall of the housing 50. Understandably, the plurality of vibration units 30 correspond to the plurality of sound outlets 54 and emit sound from the corresponding sound outlets 54, and the plurality of sound outlets 54 are located on the same side of the side wall of the housing 50, which is beneficial for manufacturing and is a reasonable design, achieving sound emission of the sound emitting module 200 on the same side.

[0138] In an embodiment, in each vibration unit 30, the first voice coil 32 part and the second voice coil 32 part are wound by the same wire, and the vibration plate 311 comprises an inner vibration plate 3111 connected with the inner wall of the voice coil 32 and an outer vibration plate 3112 connected with the outer wall of the voice coil 32; in this embodiment, the first voice coil 32 part and the second voice coil 32 part are designed integrally and wound by the same wire, which is a single voice coil 32 design, simple and convenient. The vibration plate 311 is separated into the inner vibration plate 3111 and the outer vibration plate 3112 by the voice coil 32, wherein the inner vibration plate 3111 is connected with the inner wall of the voice coil 32, and the outer vibration plate 3112 is connected with the outer wall of the voice coil 32, achieving assembly of the voice coil 32 and the diaphragm 31.

[0139] The magnetic pole directions of the first inner magnet 212 and the second inner magnet 222 are opposite, as shown in FIG. 20, the inner vibration plate 3111 has a magnetic conducting part 3113, in the vibration process, due to the action of the magnetic conducting part 3113, the inner vibration plate 3111 can be subjected to the suction force of the first magnetic assembly 21 and the second magnetic assembly 22, specifically, when the inner vibration plate 3111 vibrates towards the first magnetic assembly 21, the resultant force of the suction force of the first magnetic assembly 21 and the second magnetic assembly 22 on the magnetic conducting part 3113 points to the first magnetic assembly 21, which is beneficial for assisting the upward vibration of the inner vibration plate 3111, and when the inner vibration plate 3111 vibrates towards the second magnetic assembly 22, the resultant force of the suction force of the first magnetic assembly 21 and the second magnetic assembly 22 on the magnetic conducting part 3113 points to the second magnetic assembly 22, which is beneficial for assisting the downward vibration of the inner vibration plate 3111. Thus, the design of the magnetic conducting part 3113 can assist the vibration of the inner vibration plate 3111, improving the sound emitting effect.

[0140] In an embodiment, the inner vibrating plate 3111 is a magnetic conductive plate member to form the magnetic conductive part 3113, i.e., the inner vibrating plate 3111 itself is a magnetic conductive plate member with magnetic conductive property to form the magnetic conductive part 3113 without the need of additional magnetic conductive part 3113, thus simple structure.

[0141] In another embodiment, a magnetic conductive member is embedded in the inner vibrating plate 3111 to form the magnetic conductive part 3113. The magnetic conductive member is embedded in the inner vibrating plate 3111, thus good structural consistency and compactness.

[0142] In yet another embodiment, a magnetic conductive member is arranged on at least one side of the inner vibrating plate 3111 along the first direction to form the magnetic conductive part 3113. For example, a magnetic conductive member is arranged on the upper side of the inner vibrating plate 3111. For another example, a magnetic conductive member is arranged on the lower side of the inner vibrating plate 3111 as shown in FIG. 20. For yet another example, magnetic conductive members are arranged on both the upper and lower sides of the inner vibrating plate 3111.

[0143] In still another embodiment, a magnetic conductive material is coated on at least one side surface of the inner vibrating plate 3111 along the first direction to form the magnetic conductive part 3113. For example, a magnetic conductive material is coated on the upper side surface of the inner vibrating plate 3111. For another example, a magnetic conductive material is coated on the lower side surface of the inner vibrating plate 3111. For yet another example, magnetic conductive materials are coated on both the upper and lower side surfaces of the inner vibrating plate 3111.

[0144] The formation and position of the magnetic conductive part 3113 can be set according to actual needs, and the setting mode is various and high in flexibility.

[0145] In an embodiment, the number of the accommodating spaces 11 is two, and the number of the magnetic circuit units 20 and the number of the vibrating units 30 are consistent with and one-to-one corresponding to the number of the accommodating spaces 11.

[0146] The number of the accommodating spaces 11 can be flexibly set according to actual needs, and the number of the accommodating spaces 11 is set to two in the embodiment, thus not too much and conducive to the miniaturization design of the sound production monomer 100.

[0147] Moreover, the number of the accommodating spaces 11 is set to two, and correspondingly, the number of the magnetic circuit units 20 and the number of the vibrating units 30 are both two, one magnetic circuit unit 20 and one vibrating unit 30 are arranged in each accommodating space 11, and the two accommodating spaces 11 can be arranged side by side along the short axis edge 324 of the voice coil 32. Understandably, the size of the short axis edge 324 is shorter, and the size of the long axis edge 323 is longer, and the short axis edge 324 occupies less space compared with the long axis edge 323. Arranging the two accommodating spaces 11 side by side along the short axis edge 324 of the voice coil 32 makes the size of the shell 10 not too long, and the structural design is reasonable.

[0148] In an embodiment, the rear cavity 512 is filled with sound-absorbing material, the second module shell 53 is provided with a filling opening for filling the sound-absorbing material, and the second module shell 53 is further provided with a damping member for covering the filling opening. The rear cavity 512 is filled with sound-absorbing material, which can adjust the acoustic performance of the sound production module 200. The second module shell 53 is provided with a filling opening, which realizes filling of the sound-absorbing material in the rear cavity 512. After filling is completed, the damping member covers the filling opening to avoid leakage of the sound-absorbing material.

[0149] In an embodiment, the first support 131 can adopt an integrated design or a split design. The first support 131 adopting the integrated design is convenient to manufacture, omits assembly gaps and assembly errors, and has a compact structure. The first support 131 adopting the split design is convenient to disassemble and assemble, and has high flexibility. When the first support 131 adopts the split design, each accommodating space 11 is correspondingly provided with a first support 131.

[0150] The second support 132 can adopt an integrated design or a split design. The second support 132 adopting the integrated design is convenient to manufacture, omits assembly gaps and assembly errors, and has a compact structure. The second support 132 adopting the split design is convenient to disassemble and assemble, and has high flexibility. When the second support 132 adopts the split design, each accommodating space 11 is correspondingly provided with a second support 132.

[0151] The plurality of vibration units 30 can respectively adopt independent rear cavities 512 or share a rear cavity 512. The specific arrangement can be flexibly set according to actual conditions.

[0152] The present application also provides an electronic device comprising a device shell and the sound production module. The specific structure of the sound production module in the electronic device is referred to the above embodiments. Since the electronic device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0153] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the inventive concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A sound-generating module, characterized in that, The sound-generating module includes: The outer shell includes a first module shell and a second module shell disposed along a first direction, the first module shell and the second module shell forming a receiving cavity; A sound-emitting unit, wherein the sound-emitting unit is housed within the receiving cavity and forms a front cavity and a rear cavity with the outer shell; The sound-generating unit includes: A magnetic circuit system comprising a plurality of magnetic circuit units distributed along a second direction, each magnetic circuit unit comprising a first magnetic component and a second magnetic component spaced apart along a first direction, the second direction being perpendicular to the first direction, the first magnetic component having a first magnetic gap, and the second magnetic component having a second magnetic gap; A vibration system comprising multiple vibration units, each magnetic circuit unit corresponding to one vibration unit, each vibration unit being disposed between the first magnetic component and the second magnetic component of the corresponding magnetic circuit unit, each vibration unit comprising a diaphragm and a voice coil connected to the diaphragm, the diaphragm comprising a vibrating plate and a folded ring disposed around the vibrating plate along a second direction, the voice coil comprising a first voice coil portion and a second voice coil portion located on both sides of the vibrating plate along the first direction, the first voice coil portion being located in the first magnetic gap of the corresponding magnetic circuit unit, and the second voice coil portion being located in the second magnetic gap of the corresponding magnetic circuit unit; In the first working state, at least one of the vibration units radiates sound waves of the first phase outward, and the remaining at least one vibration unit radiates sound waves of the second phase outward. The first phase and the second phase are opposite phases, and the outer shell is provided with a sound outlet hole corresponding to each vibration unit. The sound outlet hole is connected to the front cavity, and the sound waves of each vibration unit are radiated to the outside through the corresponding sound outlet hole.

2. The sound-generating unit as described in claim 1, characterized in that, In the first working state, two adjacent vibration components radiate sound waves of the first phase and the second phase respectively, wherein each vibration component includes one vibration unit or a plurality of adjacent vibration units, and the number of vibration units in two adjacent vibration components is the same or close.

3. The sound-generating module as described in claim 1, characterized in that, In the second operating state, the plurality of vibration units radiate sound waves of the same phase outward, wherein the second operating state is different from the first operating state.

4. The sound-generating module as described in claim 1, characterized in that, In each of the aforementioned vibration units, The first voice coil section and the second voice coil section are wound from the same wire, and the diaphragm includes an inner diaphragm connected to the inner wall of the voice coil and an outer diaphragm connected to the outer wall of the voice coil; Alternatively, the first voice coil portion and the second voice coil portion are wound from the same wire, and the diaphragm includes an inner diaphragm connected to the inner wall of the voice coil and an outer diaphragm connected to the outer wall of the voice coil. The inner diaphragm includes an inner flat plate portion and an inner bent portion that extends from the outer edge of the inner flat plate portion and connects to the inner wall of the voice coil, and / or the outer diaphragm includes an outer flat plate portion and an outer bent portion that extends from the inner edge of the outer flat plate portion and connects to the outer wall of the voice coil. Alternatively, the first voice coil portion and the second voice coil portion are wound from the same wire, and the diaphragm includes an inner diaphragm connected to the inner wall of the voice coil and an outer diaphragm connected to the outer wall of the voice coil, and one side of the second voice coil portion is connected to an external circuit. Alternatively, the first voice coil portion and the second voice coil portion may be formed by independently winding different wires.

5. The sound-generating module as described in claim 1, characterized in that, In each of the vibration units, the folded ring includes a first connecting part, a deformation part and a second connecting part connected sequentially along the second direction. The first connecting part is connected to the vibration plate and the second connecting part is connected to the housing. The deformation part is recessed toward the side where the second magnetic component is located. Alternatively, in each of the vibration units, the two ends of the folded ring along the first direction are a first end and a second end, the first end is connected to the edge of the vibration plate, the second end is connected to the housing or the second magnetic component, and the first end is disposed on the same side as the first magnetic component, and the second end is disposed on the same side as the second magnetic component.

6. The sound-generating module as described in claim 1, characterized in that, The first magnetic assembly includes a first inner magnet and a first outer magnet disposed along the second direction, and the first magnetic gap is formed between the first inner magnet and the first outer magnet; The second magnetic component includes a second inner magnet and a second outer magnet disposed along the second direction, and a second magnetic gap is formed between the second inner magnet and the second outer magnet.

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

8. The sound-generating module as described in claim 1, characterized in that, In each of the aforementioned vibration units, the surface of the folded ring is provided with a conductive layer, the voice coil is electrically connected to the conductive layer, and a conductive terminal is injection molded on the housing. The conductive layer and the conductive terminal are connected by conductive adhesive, so that the voice coil is electrically connected to the conductive terminal through the conductive layer. Alternatively, each of the vibration units may further include a centering support plate, which is a conductive centering support plate, and the second voice coil unit is connected to an external circuit through the centering support plate.

9. The sound-generating module as described in any one of claims 1 to 8, characterized in that, The sound-generating unit further includes a housing, the housing having a plurality of receiving spaces distributed along the second direction, each receiving space corresponding to a magnetic circuit unit, the housing including a plastic bracket and a first metal plate and a second metal plate disposed on both sides of the plastic bracket along the first direction, the plastic bracket, the first metal plate and the second metal plate enclosing the receiving space, the first magnetic component being disposed on the first metal plate, and the second magnetic component being disposed on the second metal plate; The first metal plate is embedded in the first module shell, and the second metal plate is embedded in the second module shell.

10. The sound-generating module as described in claim 9, characterized in that, The first metal plate and / or the second metal plate are made of magnetically conductive material; And / or, the sound outlet is located on the same side of the outer casing sidewall.

11. The sound-generating module as described in claim 8, characterized in that, In each of the aforementioned vibration units, the first voice coil portion and the second voice coil portion are wound from the same wire, and the vibration plate includes an inner vibration plate connected to the inner wall of the voice coil and an outer vibration plate connected to the outer wall of the voice coil; the magnetic poles of the first inner magnet and the second inner magnet are opposite in direction, and the inner vibration plate has a magnetically conductive portion.

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

13. The sound-generating module as described in any one of claims 1 to 8, characterized in that, The rear cavity is filled with sound-absorbing material, and the second module shell has a filling port for filling the sound-absorbing material. The second module shell is also provided with a damping element for covering the filling port.

14. An electronic device, characterized in that, The electronic device includes a device housing and a sound-generating module as described in any one of claims 1 to 13.

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