Sound production monomer and sound production module

Abstract

The utility model discloses a sound production monomer and sound production module relates to electric sound technology field, and the sound production monomer includes casing, magnetic circuit system and vibration system, and the casing has a plurality of along the second direction distribution's containing space, and the magnetic circuit system includes a plurality of magnetic circuit units corresponding a plurality of containing spaces, and each magnetic circuit unit includes the first magnetic assembly and the second magnetic assembly of interval setting along the first direction, and the vibration system includes a plurality of vibration units, and each magnetic circuit unit corresponds to a vibration unit, and each vibration unit sets up between the first magnetic assembly and the second magnetic assembly of corresponding magnetic circuit unit, and each vibration unit includes diaphragm and voice coil, and the voice coil includes the first voice coil part and the second voice coil part, and the first voice coil part corresponds the first magnetic assembly, and the second voice coil part corresponds the second magnetic assembly, among each vibration unit, the bellows of diaphragm is provided with the conducting path, and the voice coil is connected with the conducting terminal of casing through the conducting path. The utility model discloses the sound production monomer can realize the light and thin design, and improve the call privacy.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic technology, and in particular to a sound-generating unit and a sound-generating module. Background Technology

[0002] Currently, portable smart devices are becoming increasingly thinner and lighter, especially foldable products. As a result, there is a growing demand for ultra-thin miniature sound modules, such as speaker modules, in terminal devices.

[0003] Conventional DPS (DiPole Speaker) loudspeakers integrate two vibration systems through a shared magnetic circuit. Both vibration systems require reserved space for upper vibration and sound outlet at the overall unit. Furthermore, each vibration system has two diaphragms, and each diaphragm requires two vibration spaces (upper and lower) for vertical vibration, resulting in four vibration spaces for both diaphragms. This significantly impacts the thickness of the DPS product. When the thickness of a DPS product is reduced, to maintain the product's EQ (Equalizer) voltage performance—that is, to maintain the product's performance at low frequencies—the speaker's input voltage must be increased to push the frequency shift of each frequency point to Xmax, thereby maximizing product performance. This requires reserving a larger vibration space both internally and at the overall unit. Therefore, the magnets, washer, and yoke in the magnetic circuit unit must be thinned. However, the thin magnetic circuit unit has a high breakage rate during transportation, cleaning, and magnetization, which leads to a sharp increase in material costs. Furthermore, since the magnets, washer, and yoke in the magnetic circuit unit are all thinned to varying degrees, the risk of product damage from drops increases, and the product reliability and yield will be greatly reduced, making mass production impossible. Utility Model Content

[0004] The main purpose of this invention is to propose a sound-emitting unit and sound-emitting module that can achieve a thin and light design and improve the privacy of calls.

[0005] To achieve the above objectives, this utility model proposes a sound-generating unit, the sound-generating unit comprising:

[0006] A housing having a plurality of receiving spaces distributed along a second direction, and conductive terminals being injection molded onto the housing;

[0007] A magnetic circuit system, the magnetic circuit system including a plurality of magnetic circuit units, each of the accommodating spaces correspondingly accommodating one of the magnetic circuit units, each magnetic circuit unit including 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;

[0008] 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 circumferentially disposed on 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 and the second voice coil portion being wound from the same wire, the first voice coil portion being located in the first magnetic gap of the corresponding magnetic circuit unit, the second voice coil portion being located in the second magnetic gap of the corresponding magnetic circuit unit, the vibrating plate comprising an inner vibrating plate connected to the inner wall of the voice coil and an outer vibrating plate connected to the outer wall of the voice coil, in a first working state, at least one vibration unit radiates a sound wave of a first phase outward, and the remaining at least one vibration unit radiates a sound wave of a second phase outward, the first phase and the second phase being opposite phases;

[0009] In each of the vibration units, the folded ring is provided with a conductive path, and the voice coil is connected to the conductive terminal through the conductive path.

[0010] In one embodiment, the conductive path is a conductive layer disposed on the surface of the folded ring, and the conductive layer and the conductive terminal are connected by conductive adhesive.

[0011] In one embodiment, in a first operating 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.

[0012] In one embodiment, in a 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.

[0013] In one embodiment, the first magnetic gap includes a first portion opposite to the first magnetic assembly in the second direction, and a second portion located in the first direction on the side of the first portion facing the diaphragm; the second magnetic gap includes a third portion opposite to the second magnetic assembly in the second direction, and a fourth portion located in the first direction on the side of the third portion facing the diaphragm; the first magnetic assembly and the second magnetic assembly have magnetic field lines passing through the first voice coil portion and the second voice coil portion respectively at the second portion and the fourth portion positions.

[0014] In one embodiment, the first voice coil portion and the second voice coil portion are wound from the same wire to form an integral voice coil extending along the first direction. The voice coil has a height along the first direction and a thickness along the second direction, and the height of the voice coil is greater than the thickness of the voice coil. Furthermore, the two ends of the voice coil are respectively opposite to the first portion and the third portion, and the width of the voice coil is smaller than the width of the first portion and the third portion.

[0015] Alternatively, part or all of the first voice coil portion and the second voice coil portion may be located in the second portion and the fourth portion, respectively.

[0016] In one embodiment, in each of the vibration units, the folded ring includes a first connecting portion, a deformation portion, and a second connecting portion connected sequentially along the second direction. The first connecting portion is connected to the vibration plate, the second connecting portion is connected to the housing, and the deformation portion is recessed toward the side where the second magnetic component is located.

[0017] And / or, 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.

[0018] In one embodiment, 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;

[0019] 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.

[0020] In one embodiment, in each of the magnetic circuit units,

[0021] 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.

[0022] And / or, the first magnetic gap and the second magnetic gap are aligned along the first direction;

[0023] And / or, the first external magnet is a ring magnet;

[0024] 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.

[0025] In one embodiment, each of the vibration units further includes a centering support plate, which is disposed at the end of the second voice coil portion away from the diaphragm. The centering support plate includes an inner fixing portion, a spring arm portion, and an outer fixing portion connected sequentially along the second direction. The inner fixing portion is connected to the second voice coil portion, the outer fixing portion is connected to the housing, and the spring arm portion connects the inner fixing portion and the outer fixing portion.

[0026] In each of the magnetic circuit units, the second magnetic component includes a plurality of second outer magnets, which are arranged circumferentially along the second inner magnet. An avoidance space is formed between any two adjacent second outer magnets, and the avoidance space is used to avoid the spring arm portion of the centering support plate corresponding to it.

[0027] In one embodiment, the magnetic poles of the first and second inner magnets are in opposite directions, and the inner vibrating plate has a magnetically conductive portion.

[0028] In one embodiment, the inner vibrating plate is a magnetically conductive plate to form the magnetically conductive part;

[0029] Alternatively, a magnetic conductive element may be embedded inside the inner vibrating plate to form the magnetic conductive part;

[0030] 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;

[0031] 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.

[0032] In one embodiment, the number of the accommodating spaces is two, and the number of the magnetic circuit units and the number of the vibration units are consistent with the number of the accommodating spaces and are arranged in a one-to-one correspondence.

[0033] And / or, the housing includes 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, the second magnetic component being disposed on the second metal plate, and the conductive terminal being injection molded on the plastic bracket.

[0034] This utility model also proposes a sound-generating module, including a housing and the sound-generating unit as described above housed within the housing. The housing forms a sound-guiding channel and a sound-exiting hole communicating with the sound-guiding channel for each of the vibration units.

[0035] In the sound-generating unit of this utility model, each magnetic circuit unit includes a first magnetic component and a second magnetic component respectively disposed on the upper and lower sides of the vibration unit, realizing the dual magnetic circuit design of the sound-generating unit, which makes the magnetic field distribution in the vibration area of ​​the voice coil uniform, and can provide the voice coil with a large driving force that changes slowly and flatly with displacement, reducing the risk of distortion.

[0036] Moreover, compared to conventional DPS loudspeakers, the multiple magnetic circuit units and multiple vibration units in the sound-generating unit of this invention are distributed horizontally, which does not occupy too much space in the vertical thickness of the shell. Furthermore, when all vibration units vibrate up and down, they only need two vibration spaces: the upper vibration space and the lower vibration space. This does not occupy additional thickness space of the sound-generating unit, which is conducive to achieving a thin design.

[0037] Furthermore, the first working state of the sound-emitting unit of this utility model can be the receiver state. In the receiver state, at least one vibration unit radiates a sound wave of the first phase outward, and the remaining at least one vibration unit radiates a sound wave of the second phase 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 cancellation, thereby improving the privacy of the call.

[0038] In each vibrating unit, the first and second voice coil sections are wound from the same wire. 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. In this embodiment, the first and second voice coil sections are integrated and wound from the same wire, forming a single voice coil design, which is simple and convenient. The diaphragm is separated into an inner diaphragm and an outer diaphragm by the voice coil. The inner diaphragm is connected to the inner wall of the voice coil, and the outer diaphragm is connected to the outer wall of the voice coil, realizing the assembly of the voice coil and the diaphragm.

[0039] Furthermore, in the sound-generating unit of this invention, conductive terminals are injection-molded onto the housing, and each vibrating unit has a conductive path in its folded ring. The voice coil is connected to the conductive terminal through the conductive path, thereby enabling the voice coil to be electrically connected to the external circuit through the conductive layer, realizing the conduction between the voice coil and the external circuit. The conductive terminals are injection-molded onto the housing, improving the integration and compactness of the housing. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 This is an assembly diagram of a sound-generating module according to an embodiment of the present invention;

[0042] Figure 2 This is a cross-sectional schematic diagram of a sound-generating module according to an embodiment of the present invention;

[0043] Figure 3 This is a cross-sectional schematic diagram of the sound-emitting unit according to another embodiment of the present invention;

[0044] Figure 4 This is an exploded view of a sound-emitting unit according to an embodiment of the present invention;

[0045] Figure 5 This is a cross-sectional schematic diagram of a sound-emitting unit according to another embodiment of the present invention;

[0046] Figure 6 This is an exploded view of another embodiment of the sound-generating module of this utility model;

[0047] Figure 7 This is another cross-sectional schematic diagram of a sound-generating module according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the magnetic field distribution of a sound-emitting unit according to an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the BL(x) curve of a sound-generating unit according to an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the magnetization of the vibrating unit in a sound-generating unit according to an embodiment of the present invention;

[0051] Figure 11 This 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;

[0052] Figure 12 This 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;

[0053] Figure 13 This is a schematic diagram of the folded ring structure in a sound-emitting monomer according to an embodiment of the present invention;

[0054] Figure 14 This is a schematic diagram of the structure of the second support in the sound-generating unit of this utility model, which adopts an integrated design.

[0055] Figure 15 This is a schematic diagram of the structure of the second support in the sound-generating unit of this utility model, which adopts a split design.

[0056] Figure 16 This 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;

[0057] Figure 17This is a schematic diagram of the structure of the second module shell and the second bracket arriving together in a sound-generating module according to an embodiment of the present invention;

[0058] Figure 18 This 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.

[0059] Explanation of icon numbers:

[0060] 100. Sound-generating unit; 10. Housing; 11. Accommodating space; 12. Conductive terminal; 13. Plastic bracket; 131. First bracket; 132. Second bracket; 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. Clearance space; 30. Vibration unit; 31. Diaphragm; 311. Vibrating plate; 3111. Inner vibrating plate; 3112. Outer vibrating plate; 3113. Magnetic conductive part; 3114. Inner flat plate part; 3115. Inner bending part; 3116. Outer 3117. Flat plate; 312. Outer bend; 312. Fold 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 membrane; 32. Voice coil; 321. First voice coil part; 322. Second voice coil part; 323. Long shaft side; 324. Short shaft side; 40. Centering support; 41. Inner fixing part; 42. Spring arm part; 43. Outer fixing part; 200. Sound generating module; 50. Outer shell; 51. Receiving cavity; 511. Front cavity; 512. Rear cavity; 52. First module shell; 53. Second module shell; 54. Sound outlet; 55. Sound guide channel.

[0061] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0062] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0063] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0064] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0065] Currently, portable smart devices are becoming increasingly thinner and lighter, especially foldable products. As a result, there is a growing demand for ultra-thin miniature sound modules, such as speaker modules, in terminal devices.

[0066] Conventional DPS (Digital Signal Processing) loudspeakers integrate two vibration systems through a shared magnetic circuit. Both vibration systems require reserved space for upper vibration and sound outlet at the overall unit. Furthermore, each system has two diaphragms, each requiring both upper and lower vibration spaces for vertical vibration, resulting in four vibration spaces for both diaphragms. This significantly impacts the thickness of the DPS product. When the thickness of a DPS product is reduced, to maintain EQ (Equalizer) performance—that is, to maintain low-frequency performance—the speaker's input voltage must be increased to push the frequency shift of each frequency point to Xmax, thereby maximizing product performance. This requires even greater vibration space both internally and at the overall unit, necessitating thinning of the magnets, washer, and yoke in the magnetic circuit unit. However, the thin magnetic circuit unit has a high breakage rate during transportation, cleaning, and magnetization, which leads to a sharp increase in material costs. Furthermore, since the magnets, washer, and yoke in the magnetic circuit unit are all thinned to varying degrees, the risk of product damage from drops increases, and the product reliability and yield will be greatly reduced, making mass production impossible.

[0067] Therefore, it is necessary to propose a sound-generating unit and a sound-generating module to solve or at least alleviate the above-mentioned technical problems.

[0068] like Figures 2 to 7As shown, this utility model proposes a sound-generating unit 100, which includes a housing 10, a magnetic circuit system, and a vibration system. The housing 10 has multiple receiving spaces 11 distributed along a second direction, and conductive terminals 12 are injection-molded onto the housing 10. The magnetic circuit system includes multiple magnetic circuit units 20, with each receiving space 11 corresponding to one magnetic circuit unit 20. Each magnetic circuit unit 20 includes a first magnetic component 21 and a second magnetic component 22 spaced apart along a first direction, the second direction being perpendicular to the first direction. The first magnetic component 21 has a first magnetic gap 211, and the second magnetic component 22 has a second magnetic gap 221. The vibration system includes multiple vibration units 30, with each magnetic circuit unit 20 corresponding to one vibration unit 30. Each vibration unit 30 is disposed between the first magnetic component 21 and the second magnetic component 22 of the corresponding magnetic circuit unit 20. Each vibration unit 30 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31. The diaphragm 31 includes a diaphragm plate 311 and a... A folded ring 312 is arranged around the vibrating plate 311 along the second direction. The voice coil 32 includes a first voice coil portion 321 and a second voice coil portion 322 located on both sides of the vibrating plate 311 along the first direction. The first voice coil portion 321 and the second voice coil portion 322 are wound from the same wire. The first voice coil portion 321 is located in the first magnetic gap 211 of the corresponding magnetic circuit unit 20, and the second voice coil portion 322 is located in the second magnetic gap 221 of the corresponding magnetic circuit unit 20. The vibrating plate 311 includes an inner vibrating plate 3111 connected to the inner wall of the voice coil 32 and an outer vibrating plate 3112 connected to the outer wall of the voice coil 32. In the first working state, at least one vibrating unit 30 radiates sound waves of the first phase outward, and the remaining at least one vibrating unit 30 radiates sound waves of the second phase outward. The first phase and the second phase are opposite phases. In each vibrating unit 30, the folded ring 312 is provided with a conductive path 3128, and the voice coil 32 is connected to the conductive terminal 12 through the conductive path 3128.

[0069] The sound-generating unit 100 of this utility model can be a loudspeaker unit, specifically a DPS loudspeaker unit. The sound-generating unit 100 can be applied in the sound-generating module 200 of electronic devices, such as computers, mobile phones, tablets, and smart wearable devices. This embodiment uses the sound-generating unit 100 as a loudspeaker unit as an example for explanation.

[0070] The first direction is Figure 2 and Figure 7 The vertical direction shown refers to the up-and-down direction, and the second direction is... Figure 2 and Figure 7 The horizontal direction shown is parallel to the horizontal plane containing the left and right directions, and is perpendicular to the vertical direction.

[0071] The housing 10 has multiple receiving spaces 11 distributed along a second direction, i.e., a horizontal direction. Each receiving space 11 contains a magnetic circuit unit 20 and a vibration unit 30, such that the multiple magnetic circuit units 20 and the multiple vibration units 30 are distributed horizontally. Each magnetic circuit unit 20 includes a first magnetic component 21 and a second magnetic component 22, which are spaced apart vertically. The vibration unit 30 is located between the first magnetic component 21 and the second magnetic component 22 of the corresponding magnetic circuit unit 20, i.e., the upper and lower sides of the vibration unit 30 are respectively provided with the first magnetic component 21 and the second magnetic component 22. The first magnetic component 21 and the second magnetic component 22 provide driving force to the voice coil 32 of the corresponding vibration unit 30, causing the voice coil 32 to vibrate along a first direction, which in turn drives the diaphragm 31 to vibrate along the first direction, thereby achieving vibration and sound generation.

[0072] The diaphragm 31 includes a vibrating plate 311 and a folded ring 312. The folded ring 312 is arranged around the vibrating plate 311 along a second direction, i.e., a horizontal direction. In other words, the folded ring 312 and the vibrating plate 311 are arranged horizontally and surround the vibrating plate 311. The first voice coil portion 321 and the second voice coil portion 322 of the voice coil 32 are located above and below the vibrating plate 311, respectively. The first voice coil portion 321 is located in the first magnetic gap 211 of the corresponding magnetic circuit unit 20, and the second voice coil portion 322 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 portion 321 and the second voice coil portion 322 reciprocate within the first magnetic gap 211 and the second magnetic gap 221, respectively, cutting magnetic lines of force and causing the diaphragm 31 to vibrate up and down, thereby inducing air to produce sound and completing the energy conversion between electroacoustic and magnetic fields.

[0073] like Figure 8 As shown, in the sound-generating unit 100 of this utility model, each magnetic circuit unit 20 includes a first magnetic component 21 and a second magnetic component 22 respectively disposed on the upper and lower sides of the vibration unit 30, realizing a dual magnetic circuit design of the sound-generating unit 100. This makes the magnetic field distribution in the vibration area of ​​the voice coil 32 uniform, and can provide the voice coil 32 with a large driving force that changes slowly and flatly with displacement. Figure 9 As shown in the BL(x) curve, this reduces the risk of distortion.

[0074] like Figure 9 As shown, the BL(x) curve is perfectly symmetrical, and the BL at the Xmax position (the maximum displacement of voice coil 32) is attenuated by less than 10% compared to the equilibrium position, thus achieving a superlinear BL(x) design. Understandably, Figure 9 The horizontal axis represents displacement in mm, and the vertical axis represents BL in Wb / m.

[0075] Moreover, compared to conventional DPS loudspeakers, the multiple magnetic circuit units 20 and multiple vibration units 30 in the sound-generating unit 100 of this invention are all distributed in the horizontal direction, which does not occupy too much space in the vertical thickness of the housing 10. Furthermore, when all vibration units 30 vibrate up and down, they only need the upper vibration space and the lower vibration space, without occupying additional thickness space of the sound-generating unit 100, which is conducive to achieving a thin design.

[0076] Furthermore, the first working state of the sound-emitting unit 100 of this utility model can be the receiver state (RCV state). In the receiver state, at least one vibration unit 30 radiates sound waves of the first phase outward, and the remaining at least one vibration unit 30 radiates sound waves of the second phase 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 cancellation, thereby improving the privacy of the call.

[0077] In each vibrating unit 30, the first voice coil portion 321 and the second voice coil portion 322 are wound from the same wire. The diaphragm 311 includes an inner diaphragm 3111 connected to the inner wall of the voice coil 32 and an outer diaphragm 3112 connected to the outer wall of the voice coil 32. In this embodiment, the first voice coil portion 321 and the second voice coil portion 322 are integrated and wound from the same wire, forming a single voice coil 32 design, which is simple and convenient. The diaphragm 311 is separated into an inner diaphragm 3111 and an outer diaphragm 3112 by the voice coil 32. The inner diaphragm 3111 is connected to the inner wall of the voice coil 32, and the outer diaphragm 3112 is connected to the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31.

[0078] Furthermore, such as Figure 13 As shown, in the sound-generating unit 100 of this utility model, conductive terminals 12 are injection-molded on the housing 10, and in each vibration unit 30, the folded ring 312 is provided with a conductive path 3128. The voice coil 32 is connected to the conductive terminal 12 through the conductive path 3128, thereby enabling the voice coil 32 to be electrically connected to the external circuit through the conductive layer 3127, realizing the conduction between the voice coil 32 and the external circuit. The conductive terminal 12 is injection-molded on the housing 10, which improves the integration and compactness of the housing 10.

[0079] Furthermore, the voice coil 32 of the sound-generating unit 100 of this invention includes a long axis side 323 and a short axis side 324 connected end to end, and multiple magnetic circuit units 20 are arranged along the extension direction of the short axis side 324. Understandably, the short axis side 324 is shorter and the long axis side 323 is longer. The short axis side 324 occupies less space than the long axis side 323. By arranging multiple accommodating spaces 11 side-by-side along the direction of the short axis side 324 of the voice coil 32, the size of the housing 10 is not excessively long, resulting in a reasonable structural design.

[0080] Furthermore, the conductive path 3128 is a conductive layer 3127 disposed on the surface of the surround 312, and the conductive layer 3127 and the conductive terminal 12 are connected by conductive adhesive. Specifically, the conductive layer 3127 is disposed on the side surface of the surround 312 facing the second voice coil portion 322, that is, the conductive layer 3127 is disposed on the lower surface of the surround 312, the second voice coil 32 is electrically connected to the conductive layer 3127, and the conductive layer 3127 and the conductive terminal 12 are connected by conductive adhesive, so that the second voice coil portion 322 is electrically connected to the external circuit through the conductive layer 3127. By making the conductive path 3128 a conductive layer 3127 on the surface of the surround 312, the surround 312 also has conductivity, resulting in a high degree of structural integration.

[0081] Furthermore, 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 30 or multiple adjacent vibration units 30, and the number of vibration units 30 in two adjacent vibration components is the same or close.

[0082] Specifically, multiple vibration units 30 are divided into different vibration components. The number of vibration components is at least two, and each vibration component includes one vibration unit 30 or multiple adjacent vibration units 30. The number of vibration units 30 in two adjacent vibration components is the same or close. Understandably, the number of vibration units 30 in two adjacent vibration components is close, meaning that the difference in the number of vibration units 30 in the two vibration components is equal to one or two. In short, the difference in the number of adjacent vibration units 30 should not be too large, so as to avoid an imbalance in the number of vibration units 30 radiating outwards with opposite phases, which would affect the privacy of the call.

[0083] For ease of description, the first phase is represented by "+" and the second phase by "-".

[0084] When the receiver is in operation and there are two vibration units 30, the radiation modes are + and -, respectively.

[0085] When the number of vibration units 30 is three, the radiation modes are +, +, - / +, -, - / +, -, + / -, +, -;

[0086] When there are four vibration units 30, the radiation modes are +, +, -, - / +, -, +, -, etc.;

[0087] When the number of vibration units 30 is five, the radiation modes are +, +, +, -, - / +, +, -, -, + / +, -, +, -, +, -, +, etc.

[0088] When the number of vibration units 30 is six, the radiation modes are +, +, +, -, -, - / +, +, -, -, +, + / +, -, +, -, +, -, +, -, etc.

[0089] By analogy, the phase mode of sound waves radiated outward by multiple vibration units 30 can be diversified and flexible to meet various needs.

[0090] In one embodiment, in a second operating state, multiple vibration units 30 radiate sound waves of the same phase outward, wherein the second operating state is different from the first operating state.

[0091] Specifically, the second working state of the sound-generating unit 100 of this utility model can be the loudspeaker state (SPK state). In the loudspeaker state, all vibration units 30 radiate sound waves of the same phase outward. Sound waves of the same phase can superimpose sound waves, improve the playback effect, and broaden the sound playback frequency band.

[0092] like Figure 2 , Figure 3 , Figure 5 and Figure 7 further integration Figure 8 As shown, the first magnetic gap 211 includes a first portion 2111 opposite to the first magnetic assembly 21 in the second direction, and a second portion 2112 located on the side of the first portion 2111 facing the resonating plate 311 in the first direction; the second magnetic gap 221 includes a third portion 2211 opposite to the second magnetic assembly 22 in the second direction, and a fourth portion 2212 located on the side of the third portion 2211 facing the resonating plate 311 in the first direction. Parts or all of the first voice coil portion 321 and the second voice coil portion 322 are located in the second portion 2112 and the fourth portion 2212, respectively. Depending on the actual situation, portions of the first voice coil portion 321 and the second voice coil portion 322 may extend into the first portion 2111 and the third portion 2211. Furthermore, the first magnetic component 21 and the second magnetic component 22 have magnetic field lines passing through the first voice coil portion 321 and the second voice coil portion 322 respectively at the second part 2112 and the fourth part 2212, forming a relatively long and uniformly distributed magnetic field region in the vertical direction. This results in more and denser magnetic field lines passing through the voice coil 32, leading to a greater driving force. This provides the voice coil 32 with a large and flat driving force that changes slowly with displacement, thereby achieving a superlinear BL(x) design and reducing the risk of distortion. Figure 8 and Figure 9 As shown.

[0093] In one embodiment, the first voice coil portion 321 and the second voice coil portion 322 are formed by winding the same wire to create an integral voice coil 32 extending in a first direction. The voice coil 32 has a height in the first direction and a thickness in a second direction, with the height of the voice coil 32 being greater than its thickness. It should be noted that the thickness of the voice coil 32 is the distance between the inner and outer walls of the annular voice coil. In this embodiment, the height of the voice coil 32 is greater than its thickness, resulting in less influence from magnetic field changes during vibration, especially under conditions of large vibration amplitude. The BL(x) curve is significantly flatter, significantly reducing distortion in the driver unit 100 and improving sound quality. The voice coil 32 of this embodiment is suitable for full-range loudspeakers, with an operating frequency range of 20Hz to 20kHz. Specifically, the ratio of the height to the thickness of the voice coil 32 can be between 1.1:1 and 10:1. The specific ratio can be 1.1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc., and users can choose according to their actual needs.

[0094] Furthermore, the two ends of the voice coil 32 are respectively opposite to the first part 2111 and the third part 2211, and the width of the voice coil 32 is smaller than the width of the first part 2111 and the third part 2211. During the vibration process, the first voice coil part 321 and the second voice coil part 322 extend into the first part 2111 and the third part 2211 respectively. The first part 2111 and the third part 2211 respectively play a role in avoiding the first voice coil part 321 and the second voice coil part 322 corresponding to each other. This can ensure the vibration amplitude of the first voice coil part 321 and the second voice coil part 322 when the thickness of the sound-generating unit 100 is constant, or reduce the thickness of the sound-generating unit 100 when the vibration amplitude of the first voice coil part 321 and the second voice coil part 322 is constant, which is convenient for thin design.

[0095] like Figure 3 As shown, in one embodiment, in each vibrating unit 30, the diaphragm 31 further includes a waterproof membrane 313. The waterproof membrane 313 connects the inner vibrating plate 3111 and the outer vibrating plate 3112. The waterproof membrane 313 is attached to and wraps around the end of the second voice coil portion 322 facing the second magnetic assembly 22. Specifically, the inner vibrating plate 3111 and the outer vibrating plate 3112 are connected by the waterproof membrane 313. The waterproof membrane 313 is attached to the upper end of the second voice coil portion 322, serving a waterproof function and improving the waterproof performance and level of the sound-generating unit 100.

[0096] In one embodiment, Figures 2 to 6 , Figures 11 to 13 As shown, in two adjacent vibration units 30, the two folded rings 312 are connected to each other as one unit, which is convenient for manufacturing.

[0097] like Figure 7As shown, in one embodiment, in each vibration unit 30, the folded ring 312 includes a first connecting part 3124, a deformation part 3125 and a second connecting part 3126 connected sequentially along the second direction. The first connecting part 3124 is connected to the vibration plate 311, the second connecting part 3126 is connected to the housing 10, and the deformation part 3125 is recessed toward the side where the second magnetic component 22 is located.

[0098] In this embodiment, the folded ring 312 is a horizontal folded ring 312. The folded ring 312 includes a first connecting portion 3124, a deformation portion 3125, and a second connecting portion 3126 connected sequentially in the horizontal direction. The first connecting portion 3124 is connected to the vibrating plate 311, and the second connecting portion 3126 is connected to the housing 10, realizing assembly with the housing 10. The deformation portion 3125 is recessed downwards, which is beneficial for supporting and guiding the vertical vibration of the diaphragm 31. Designing the folded ring 312 as a horizontal folded ring 312 results in a simple structure and can better guide the vertical movement of the diaphragm 31, maintain the linearity of the vibration, reduce non-axial offset, and further reduce distortion.

[0099] In one embodiment, the inner diaphragm 3111 includes an inner flat plate portion 3114 and an inner bent portion that extends from the outer edge of the inner flat plate portion 3114 and connects to the inner wall of the voice coil 32, and / or, the outer diaphragm 3112 includes an outer flat plate portion 3116 and an outer bent portion that extends from the inner edge of the outer flat plate portion 3116 and connects to the outer wall of the voice coil 32. In this embodiment, the first voice coil portion 321 and the second voice coil portion 322 are integrated into one piece, wound from the same wire, forming a single voice coil 32 design, which is simple and convenient. The diaphragm 311 is separated into an inner diaphragm 3111 and an outer diaphragm 3112 by the voice coil 32, wherein the inner diaphragm 3111 is connected to the inner wall of the voice coil 32, and the outer diaphragm 3112 is connected to the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31.

[0100] The inner diaphragm 3111 includes an inner flat plate portion 3114 and an inner bent portion 3115-3123. The inner bent portion 3115-3123 is formed by extending the outer edge of the inner flat plate portion 3114 along a first direction, i.e., by bending vertically, thereby increasing the connection area between the inner diaphragm 3111 and the inner wall of the voice coil 32 and improving the assembly stability of the inner diaphragm 3111 and the voice coil 32. The outer diaphragm 3112 includes an outer flat plate portion 3116 and an outer bent portion. The outer bent portion is formed by extending the inner edge of the outer flat plate portion 3116 along a first direction, i.e., by bending vertically, thereby increasing the connection area between the outer diaphragm 3112 and the outer wall of the voice coil 32 and improving the assembly stability of the outer diaphragm 3112 and the voice coil 32.

[0101] like Figure 5As shown, in another embodiment, in the vibration unit 30, the folded ring 312 has a wave-shaped curved structure. The two ends of the folded ring 312 along 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 vibration plate 311, and the second end 3122 is connected to the housing 10 or the second magnetic component 22. The first end 3121 is disposed on the same side as the first magnetic component 21, and the second end 3122 is disposed on the same side as the second magnetic component 22.

[0102] Specifically, the two ends of the folded ring 312 along the vertical direction are a first end 3121 and a second end 3122, respectively. The first end 3121 is connected to the vibrating plate 311, and the second end 3122 is connected to the housing 10 or the second magnetic component 22. The first end 3121 is set on the same side as the first magnetic component 21, and the second end 3122 is set on the same side as the second magnetic component 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 with an extension in the vertical direction, which reduces the space occupied by the folded ring 312 in the horizontal direction, expands the size of the vibrating plate 311 in the horizontal direction of the sound-generating unit 100, increases the effective vibration area (SD) of the sound-generating unit 100, increases the sensitivity of the sound-generating unit 100, and improves the mid-frequency performance of the product, thus optimizing the mid-frequency performance of the product.

[0103] like Figure 5 As shown, in one embodiment, the fold ring 312 includes a plurality of bent portions 3123 connected sequentially along a first direction. Each bent portion 3123 bends toward a second direction, and any two adjacent bent portions 3123 bend in opposite directions, so that the fold ring 312 forms a wave-shaped bending structure. The two outermost bent portions 3123 along the first direction respectively form a first end 3121 and a second end 3122.

[0104] Specifically, the folded ring 312 includes multiple bent portions 3123 connected sequentially in the vertical direction. Each bent portion 3123 bends horizontally, and the bending directions of any two adjacent bent portions 3123 are opposite, making the folded ring 312 form a wave-shaped bending structure. The two outermost bent portions 3123 along the first direction form the first end 3121 and the second end 3122, respectively. That is, the uppermost bent portion 3123 and the lowermost bent portion 3123 form the first end 3121 and the second end 3122, respectively. Designing the folded ring 312 as a wave-shaped bending structure that is arranged vertically and bends multiple times in the horizontal direction improves the ductility of the folded ring 312, further reduces the space occupied by the folded ring 312 in the horizontal direction, thereby further expanding the size of the diaphragm 311 in the horizontal direction of the sound-generating unit 100, increasing the effective vibration area of ​​the sound-generating unit 100 to a greater extent, further improving the sensitivity of the sound-generating unit 100 and optimizing the mid-frequency performance.

[0105] Each bend 3123 is an arc-shaped bend 3123, and any two adjacent bends 3123 are smoothly connected, which improves the smoothness and continuity of the fold 312, avoids stress concentration, and is more conducive to improving the ductility of the fold 312.

[0106] In one embodiment, a folded ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic assembly 22, and a second end 3122 is disposed around the second magnetic assembly 22. For example... Figure 5 As shown, the folded ring 312 is connected to the side of the vibrating plate 311 facing the second magnetic component 22, that is, 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 component 22, which is a reasonable structural design.

[0107] In one embodiment, the outline dimension of the second end 3122 projected along the first direction is larger than the outline dimension of the first end 3121 projected along the first direction. That is, the outline dimension of the second end 3122 projected along the vertical direction onto the horizontal plane is larger than the outline dimension of the first end 3121 projected onto the horizontal plane. Both the first end 3121 and the second end 3122 are arranged in a ring shape. Compared with the first end 3121, the outer outline dimension of the second end 3122 is increased, which further improves the extensibility of the folded ring 312, reduces the space occupied by the folded ring 312 in the horizontal direction, expands the size of the vibrating plate 311 in the horizontal direction of the sound-generating unit 100, thereby increasing the effective vibration area of ​​the sound-generating unit 100, and at the same time improving the compliance of the folded ring 312.

[0108] In one embodiment, the outline of the outer edge of the vibrating plate 311 projected along the first direction is located outside the outline of the second magnetic component 22 projected along the first direction. That is, the outline of the outer edge of the vibrating plate 311 projected on the horizontal plane is located outside the outline of the second magnetic component 22 projected on the horizontal plane, which makes the outer outline size of the vibrating plate 311 larger and increases the effective vibration area of ​​the sound generating unit 100.

[0109] In one embodiment, the outline of the outer edge of the vibrating plate 311 projected along the first direction is located outside the outline of the first magnetic component 21 projected along the first direction. That is, the outline of the outer edge of the vibrating plate 311 projected on the horizontal plane is located outside the outline of the first magnetic component 21 projected on the horizontal plane, which makes the outer outline size of the vibrating plate 311 larger and increases the effective vibration area of ​​the sound generating unit 100.

[0110] In one embodiment, the vibrating plate 311 is bent and extended towards the first magnetic component 21 near its outer edge to form a ramp structure, and the first magnetic component 21 is provided with a clearance portion for avoiding the ramp structure. Specifically, the vibrating plate 311 is bent and extended upward near its outer edge to form a ramp structure, and the clearance portion of the first magnetic component 21 can avoid the ramp structure to prevent interference between the first magnetic component 21 and the vibrating plate 311.

[0111] like Figures 2 to 8 , Figure 10 As shown, in one embodiment, the first magnetic component 21 includes a first inner magnet 212 and a first outer magnet 213 disposed along a second direction. A first magnetic gap 211 is formed between the first inner magnet 212 and the first outer magnet 213. Magnetic field lines passing through the first magnetic gap 211 can be generated between the first inner magnet 212 and the first outer magnet 213, so that when the first voice coil portion 321 is energized, the first voice coil portion 321 vibrates up and down to cut the magnetic field lines.

[0112] The second magnetic component 22 includes a second inner magnet 222 and a second outer magnet 223 arranged along the second direction. A second magnetic gap 221 is formed between the second inner magnet 222 and the second outer magnet 223. Magnetic field lines passing through the second magnetic gap 221 can be generated between the second inner magnet 222 and the second outer magnet 223, so that when the second voice coil portion 322 is energized, the second voice coil portion 322 vibrates up and down to cut the magnetic field lines.

[0113] The first inner magnet 212 and the first outer magnet 213 form the surface of the first magnetic assembly 21 on the side facing the vibrating plate 311, and the second inner magnet 222 and the second outer magnet 223 form the surface of the second magnetic assembly 22 on the side facing the vibrating plate 311.

[0114] like Figure 8 As shown, compared to the first part 2111 of the first magnetic gap 211 and the third part 2211 of the second magnetic gap 221, the first magnetic assembly 21 and the second magnetic assembly 22 mainly form a longer vertical magnetic field region with a more uniform magnetic field distribution in the second part 2112 and the fourth part 2212, respectively, which can provide the voice coil 32 with a larger and flat driving force that changes slowly with displacement. Figure 9 As shown, the BL(x) curve is almost perfectly symmetrical from left to right, and the BL at the Xmax position (the maximum displacement of the voice coil 32) is attenuated by less than 10% compared to the equilibrium position, thus achieving a superlinear BL(x) design and reducing the risk of distortion.

[0115] Meanwhile, compared to the structure in which a magnetic guide plate is provided on the side of the inner and outer magnets of the two magnetic circuit components facing the vibrating plate 311, the magnetic guide plate has the function of concentrating magnetic field lines, causing the magnetic field lines to be relatively concentrated in the area corresponding to the magnetic guide plate, resulting in uneven distribution of magnetic field lines in the areas where the first voice coil part 321 and the second voice coil part 322 are located. In this embodiment, the sound-generating unit 100 eliminates the setting of the magnetic guide plate, making the distribution of magnetic field lines corresponding to the first voice coil part 321 and the second voice coil part 322 more uniform. The magnetic field changes of the first voice coil part 321 and the second voice coil part 322 during vibration are smaller, the BL(x) curve is flatter, the vibration consistency is better, effectively reducing distortion and avoiding sound quality loss. Furthermore, eliminating the use of the magnetic guide plate can further reduce the size of the sound-generating unit 100 along the first direction, facilitating thinner design.

[0116] The first voice coil portion 321 and the second voice coil portion 322 can be entirely located in the second part 2112 and the fourth part 2212, respectively. Alternatively, the first voice coil portion 321 and the second voice coil portion 322 can be partially located in the second part 2112 and the fourth part 2212, respectively, and another part of the first voice coil portion 321 and the second voice coil portion 322 can extend into the first part 2111 and the third part 2211. The above positional relationship refers to the assembly state of the sound-generating unit. When a part of the first voice coil portion 321 and the second voice coil portion 322 extends into the first part 2111 and the third part 2211, the height of the first voice coil portion 321 and the second voice coil portion 322 is relatively large, which further reduces the influence of magnetic field changes during vibration, resulting in a flatter BL(x) curve, better vibration consistency, effectively reducing distortion, and avoiding sound quality loss. The first voice coil portion 321 and the second voice coil portion 322 can also be entirely located in the second part 2112 and the fourth part 2212, which can further reduce the height of the sound-generating unit 100 while meeting performance requirements.

[0117] In one embodiment, in each magnetic circuit unit 20, the magnetic poles of the first inner magnet 212 and the second inner magnet 222 are opposite, the magnetic poles of the first outer magnet 213 and the second outer magnet 223 are opposite, and the magnetic poles of the first inner magnet 212 and the first outer magnet 213 are opposite. With this configuration, the magnetic field lines of the first inner magnet 212 and the second inner magnet 222 repel each other, and the magnetic field lines of the first outer magnet 213 and the second outer magnet 223 repel each other. A closed magnetic loop is formed between the magnetic field lines generated by the first outer magnet 213 and the first inner magnet 212. A closed magnetic loop is also formed between the magnetic field lines generated by the second outer magnet 223 and the second inner magnet 222. The first magnetic assembly 21 and the second magnetic assembly 22 have magnetic field lines passing through the first voice coil portion 321 and the second voice coil portion 322 at the second part 2112 and the fourth part 2212, respectively. These magnetic field lines form a relatively long vertical magnetic field region with a relatively uniform magnetic field distribution. This results in more and denser magnetic field lines passing through the voice coil 32, leading to a greater driving force. This provides the voice coil 32 with a large and slowly changing flat driving force, thereby achieving a superlinear BL(x) design and reducing the risk of distortion. Figure 8 and Figure 9 As shown.

[0118] In one embodiment, the first magnetic gap 211 and the second magnetic gap 221 are aligned along a first direction so that the first voice coil portion 321 and the second voice coil portion 322 located in the first magnetic gap 211 and the second magnetic gap 221 respectively are aligned, thereby improving vibration consistency and avoiding sway.

[0119] In one embodiment, the first external magnet 213 is a ring magnet. The ring magnet has good continuity, which is beneficial to improving the uniformity of the magnetic field distribution.

[0120] The first inner magnet 212 and the second inner magnet 222 are arranged opposite to each other, and the first outer magnet 213 and the second outer magnet 223 are arranged opposite to each other. This facilitates the alignment of the first magnetic gap 211 and the second magnetic gap 221, so that the first voice coil portion 321 and the second voice coil portion 322 located in the first magnetic gap 211 and the second magnetic gap 221 respectively are aligned, thereby improving vibration consistency and avoiding swaying.

[0121] In one embodiment, the dimensions of the first inner magnet 212 along the second direction are the same as those of the second inner magnet 222 along the second direction, and the dimensions of the first outer magnet 213 along the second direction are the same as those of the second outer magnet 223 along the second direction. This is beneficial for improving the uniformity of the magnetic field distribution and the symmetry in the vertical direction, resulting in a flatter BL(x) curve.

[0122] In one embodiment, the dimensions of the first inner magnet 212 along the second direction are the same as those of the second inner magnet 222 along the second direction, and the dimensions of the first outer magnet 213 along the second direction are smaller than those of the second outer magnet 223 along the second direction. Specifically, the shapes of the first inner magnet 212 and the second inner magnet 222 are matched, and the dimensions of the first inner magnet 212 in the horizontal direction are the same as those of the second inner magnet 222 in the horizontal direction, which helps to improve the uniformity of the magnetic field distribution. Furthermore, the dimensions of the first outer magnet 213 in the horizontal direction are smaller than those of the second outer magnet 223 in the horizontal direction, that is, the outer edge dimension of the first outer magnet 213 is smaller than that of the second outer magnet 223. Compared with the second outer magnet 223, the outer edge of the first outer magnet 213 is narrowed to avoid interference between the first outer magnet 213 and the diaphragm 31.

[0123] In one embodiment, each vibration unit 30 further includes a centering support plate 40, which is disposed at the end of the second voice coil portion 322 away from the diaphragm 31. The centering support plate 40 includes an inner fixing portion 41, a spring arm portion 42 and an outer fixing portion 43 connected sequentially along the second direction. The inner fixing portion 41 is connected to the second voice coil portion 322, the outer fixing portion 43 is connected to the housing 10, and the spring arm portion 42 connects the inner fixing portion 41 and the outer fixing portion 43.

[0124] In each magnetic circuit unit 20, the second magnetic component 22 includes a plurality of second outer magnets 223. The plurality of second outer magnets 223 are arranged at circumferential intervals along the second inner magnet 222. An avoidance space 224 is formed between any two adjacent second outer magnets 223. The avoidance space 224 is used to avoid the spring arm portion 42 of the corresponding centering support plate 40.

[0125] like Figures 3 to 6 As shown, a centering support 40 is disposed at the bottom end of the second voice coil portion 322. The centering support 40 includes an inner fixing portion 41, a spring arm portion 42, and an outer fixing portion 43. The inner fixing portion 41, the spring arm portion 42, and the outer fixing portion 43 are connected sequentially from the inside to the outside in the horizontal direction. The outer fixing portion 43 is connected to the housing 10, while the inner fixing portion 41 is connected to the second voice coil portion 322. The spring arm portion 42 connects the inner fixing portion 41 and the outer fixing portion 43. The spring arm portion 42 is elastic, allowing the inner fixing portion 41 to vibrate with the second voice coil portion 322. The centering support 40 provides centering and support for the voice coil 32, preventing the voice coil 32 from becoming polarized and improving the vibration stability of the voice coil 32. The second magnetic component 22 has a clearance space 224. Specifically, the second magnetic component 22 includes a plurality of second outer magnets 223. The plurality of second outer magnets 223 are arranged at circumferential intervals along the second inner magnet 222. A clearance space 224 for avoiding the projectile arm portion 42 is formed between any two adjacent second outer magnets 223.

[0126] The clearance space 224 can accommodate the corresponding centering support 40, specifically the spring arm 42 of the centering support 40. The layout is reasonable, and the centering support 40 and the magnetic circuit unit 20 do not interfere with each other. Furthermore, one side of the second voice coil 322 is connected to the external circuit, realizing the conduction between the voice coil 32 and the external circuit.

[0127] In one embodiment, in each vibration unit 30, the centering support 40 is a conductive centering support 40, and the second voice coil 322 is connected to the external circuit through the centering support 40, thereby realizing the conduction between the second voice coil 322 and the external circuit. Furthermore, the centering support 40 is conductive, eliminating the need for other conductive components, resulting in a high degree of integration and simplifying the structure.

[0128] In one embodiment, the magnetic poles of the first inner magnet 212 and the second inner magnet 222 are opposite in direction, and the inner diaphragm 3111 has a magnetically conductive portion 3113. In this embodiment, the first voice coil portion 321 and the second voice coil portion 322 are integrated into a single design, wound from the same wire, forming a single voice coil 32 design, which is simple and convenient. The diaphragm 311 is separated into an inner diaphragm 3111 and an outer diaphragm 3112 by the voice coil 32, wherein the inner diaphragm 3111 is connected to the inner wall of the voice coil 32, and the outer diaphragm 3112 is connected to the outer wall of the voice coil 32, realizing the assembly of the voice coil 32 and the diaphragm 31. Furthermore, the inner vibrating plate 3111 has a magnetically conductive part 3113. During vibration, due to the action of the magnetically conductive part 3113, the inner vibrating plate 3111 can be attracted by the first magnetic component 21 and the second magnetic component 22. Specifically, when the inner vibrating plate 3111 vibrates towards the first magnetic component 21, the resultant force of the attraction of the first magnetic component 21 and the second magnetic component 22 on the magnetically conductive part 3113 points towards the first magnetic component 21, which is beneficial for assisting the inner vibrating plate 3111 to vibrate upward. When the inner vibrating plate 3111 vibrates towards the second magnetic component 22, the resultant force of the attraction of the first magnetic component 21 and the second magnetic component 22 on the magnetically conductive part 3113 points towards the second magnetic component 22, which is beneficial for assisting the inner vibrating plate 3111 to vibrate downward. Thus, the design of the magnetically conductive part 3113 can assist the vibration of the inner vibrating plate 3111 and improve the sound production effect.

[0129] In one embodiment, the inner vibrating plate 3111 is a magnetically conductive plate to form a magnetically conductive part 3113. That is, the inner vibrating plate 3111 itself is a magnetically conductive plate to form a magnetically conductive part 3113, without the need to set other magnetically conductive parts 3113, and the structure is simple.

[0130] In another embodiment, a magnetic conductive element is embedded inside the inner vibrating plate 3111 to form a magnetic conductive part 3113. Embedding the magnetic conductive element inside the inner vibrating plate 3111 results in good structural consistency and compactness.

[0131] In another embodiment, the inner vibrating plate 3111 has a magnetically conductive element on at least one side along the first direction to form a magnetically conductive portion 3113. For example, a magnetically conductive element is provided on the upper side of the inner vibrating plate 3111. Alternatively, a magnetically conductive element is provided on the lower side of the inner vibrating plate 3111. Yet another example is that magnetically conductive elements are provided on both the upper and lower sides of the inner vibrating plate 3111.

[0132] In another embodiment, at least one surface of the inner vibrating plate 3111 along the first direction is coated with a magnetically conductive material to form a magnetically conductive portion 3113. For example, the upper surface of the inner vibrating plate 3111 is coated with a magnetically conductive material. Alternatively, the lower surface of the inner vibrating plate 3111 is coated with a magnetically conductive material. Yet another example is that both the upper and lower surfaces of the inner vibrating plate 3111 are coated with a magnetically conductive material.

[0133] The magnetic conductive part 3113 of this utility model can be formed and positioned according to actual needs, and the setting method is diverse and highly flexible.

[0134] In one embodiment, there are two accommodating spaces 11, and the number of magnetic circuit units 20 and vibration units 30 are consistent with the number of accommodating spaces 11 and are arranged in a one-to-one correspondence.

[0135] The number of accommodating spaces 11 can be flexibly set according to actual needs. In this embodiment, the number of accommodating spaces 11 is set to two, which is not too many and is conducive to realizing the miniaturization design of the sound-generating unit 100.

[0136] Furthermore, the number of accommodating spaces 11 is set to two, and correspondingly, the number of magnetic circuit units 20 and vibration units 30 is also two. Each accommodating space 11 is provided with one magnetic circuit unit 20 and one vibration unit 30. The two accommodating spaces 11 can be arranged side by side along the direction of the short axis side 324 of the voice coil 32. Understandably, the size of the short axis side 324 is shorter and the size of the long axis side 323 is longer. The short axis side 324 occupies less space than the long axis side 323. Arranging the two accommodating spaces 11 side by side along the direction of the short axis side 324 of the voice coil 32 ensures that the size of the housing 10 is not too long, and the structural design is reasonable.

[0137] like Figure 2 As shown, the housing 10 includes a plastic bracket 13 and a first metal plate 14 and a second metal plate 15 disposed on both sides of the plastic bracket 13 along a first direction. The plastic bracket 13, the first metal plate 14 and the second metal plate 15 enclose a receiving space 11. A first magnetic component 21 is disposed on the first metal plate 14 and a second magnetic component 22 is disposed on the second metal plate 15. A conductive terminal 12 is injection molded on the plastic bracket 13.

[0138] Specifically, the first metal plate 14 and the second metal plate 15 are respectively disposed on the upper and lower sides of the plastic bracket 13. The plastic bracket 13, the first metal plate 14, and the second metal plate 15 of the housing 10 enclose and form an accommodating space 11, which is a reasonable structural design. Moreover, the first magnetic component 21 is disposed on the first metal plate 14, and the second magnetic component 22 is disposed on the second metal plate 15, realizing the assembly between the housing 10 and the magnetic circuit unit 20. Furthermore, conductive terminals 12 are injection molded on the plastic bracket 13, which improves the integration and compactness of the plastic bracket 13.

[0139] Furthermore, the first metal plate 14 and / or the second metal plate 15 are made of magnetically conductive material, which enables the first metal plate 14 and / or the second metal plate 15 to have magnetic conductivity, which is beneficial for correcting magnetic field lines.

[0140] like Figure 2 , Figure 4 and Figure 6 As shown, in one embodiment, the plastic bracket 13 includes a first bracket 131 and a second bracket 132. The first bracket 131 and the second bracket 132 are designed separately along a first direction, i.e., along the vertical direction, for easy assembly and disassembly. The first bracket 131, the second bracket 132, the first metal plate 14, and the second metal plate 15 enclose and form an accommodating space 11. The first bracket 131 surrounds the first magnetic component 21, and the second bracket 132 surrounds the second magnetic component 22. Conductive terminals 12 are injection molded on the second bracket 132, resulting in a reasonable structural design.

[0141] like Figure 1 and Figure 2 As shown, this utility model also proposes a sound-generating module 200, including a housing 50 and the aforementioned sound-generating unit 100 housed within the housing 50. The housing 50 has a sound-guiding channel 55 for each vibrating unit 30 to radiate sound waves and a sound outlet 54 communicating with the sound-guiding channel 55. The housing 50 can house the sound-generating unit 100 and allows the sound waves generated by the vibrating unit 30 driving the air to be emitted through the sound-guiding channel 55 and the sound outlet 54, thus realizing the normal sound output of the sound-generating module 200.

[0142] Furthermore, the outer casing 50 includes a first module shell 52 and a second module shell 53 arranged along a first direction, which together form a receiving cavity 51. The sound-generating unit 100 is housed within the receiving cavity 51, which divides the receiving cavity 51 into a front cavity 511 and a rear cavity 512. The outer casing 50 has a sound outlet 54 corresponding to each vibration unit 30, which communicates with the front cavity 511. The sound waves of each vibration unit 30 are radiated to the outside through the corresponding sound outlet 54, thus realizing the normal sound output of the sound-generating module 200.

[0143] 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, resulting in a compact structure.

[0144] like Figure 16 and Figure 17 As shown, during the assembly of the sound-generating module 200, the first module shell 52 can be supplied together with the first bracket 131, and the second module shell 53 can be supplied together with the second bracket 132, thereby improving assembly efficiency and convenience.

[0145] In one embodiment, the sound outlet 54 is located on the same side of the side wall of the housing 50. Understandably, multiple vibration units 30 have multiple sound outlets 54 and emit sound from the corresponding sound outlets 54. The multiple sound outlets 54 are located on the same side of the side wall of the housing 50, which is convenient for manufacturing and reasonable in design, so as to realize that the sound generation module 200 emits sound on the same side.

[0146] In one embodiment, the rear cavity 512 is filled with sound-absorbing material, and the second module shell 53 has a filling port for the sound-absorbing material. The second module shell 53 is also provided with a damping member for covering the filling port. Filling the rear cavity 512 with sound-absorbing material can adjust the acoustic performance of the sound-generating module 200. The filling port in the second module shell 53 allows the sound-absorbing material to be filled into the rear cavity 512. After filling is completed, the damping member covers the filling port to prevent sound-absorbing material leakage.

[0147] In one embodiment, the first bracket 131 can be a one-piece design or a split design. The one-piece design of the first bracket 131 is easy to manufacture, eliminates assembly gaps and assembly errors, and has a compact structure. The split design of the first bracket 131 is easy to assemble and disassemble and has high flexibility. When the first bracket 131 is designed as a split design, each accommodating space 11 is provided with a corresponding first bracket 131.

[0148] like Figure 14 and Figure 15 As shown, the second bracket 132 can be designed as an integral unit or a separate unit. The integral design of the second bracket 132 is easier to manufacture, eliminates assembly gaps and assembly errors, and has a compact structure. The separate design of the second bracket 132 is easier to assemble and disassemble and has high flexibility. When the second bracket 132 is designed as a separate unit, each accommodating space 11 is provided with a corresponding second bracket 132.

[0149] Multiple vibration units 30 can each use an independent rear cavity 512 or share a common rear cavity 512, which can be flexibly set according to the actual situation.

[0150] The sound-generating module 200 can be a speaker module, specifically a DPS speaker module. The sound-generating module 200 can be used in electronic devices such as computers, mobile phones, tablets, and smart wearable devices. The specific structure of the sound-generating unit 100 in this sound-generating module 200 is as described in the above embodiments. Since this sound-generating module 200 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0151] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating monomer, characterized in that, The sound-generating unit includes: A housing having a plurality of receiving spaces distributed along a second direction, and conductive terminals being injection molded onto the housing; A magnetic circuit system, the magnetic circuit system including a plurality of magnetic circuit units, each of the accommodating spaces correspondingly accommodating one of the magnetic circuit units, each magnetic circuit unit including 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 circumferentially disposed on 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 and the second voice coil portion being wound from the same wire, the first voice coil portion being located in the first magnetic gap of the corresponding magnetic circuit unit, the second voice coil portion being located in the second magnetic gap of the corresponding magnetic circuit unit, the vibrating plate comprising an inner vibrating plate connected to the inner wall of the voice coil and an outer vibrating plate connected to the outer wall of the voice coil, in a first working state, at least one vibration unit radiates a sound wave of a first phase outward, and the remaining at least one vibration unit radiates a sound wave of a second phase outward, the first phase and the second phase being opposite phases; In each of the vibration units, the folded ring is provided with a conductive path, and the voice coil is connected to the conductive terminal through the conductive path.

2. The sound-generating unit as described in claim 1, characterized in that, The conductive path is a conductive layer disposed on the surface of the folded ring, and the conductive layer and the conductive terminal are connected by conductive adhesive.

3. 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.

4. The sound-generating unit 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.

5. The sound-generating unit as described in claim 1, characterized in that, The first magnetic gap includes a first portion opposite to the first magnetic assembly in the second direction, and a second portion located on the side of the first portion facing the diaphragm in the first direction; the second magnetic gap includes a third portion opposite to the second magnetic assembly in the second direction, and a fourth portion located on the side of the third portion facing the diaphragm in the first direction; the first magnetic assembly and the second magnetic assembly have magnetic field lines passing through the first voice coil portion and the second voice coil portion respectively at the second portion and the fourth portion positions.

6. The sound-generating unit as described in claim 5, characterized in that, The first voice coil portion and the second voice coil portion are formed by winding the same wire to form an integral voice coil extending along the first direction. The voice coil has a height along the first direction and a thickness along the second direction, and the height of the voice coil is greater than the thickness of the voice coil. The two ends of the voice coil are respectively opposite to the first part and the third part, and the width of the voice coil is smaller than the width of the first part and the third part. Alternatively, part or all of the first voice coil portion and the second voice coil portion may be located in the second portion and the fourth portion, respectively.

7. The sound-generating unit 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. And / or, 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.

8. The sound-generating unit as described in any one of claims 1 to 7, 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 assembly includes a second inner magnet and a second outer magnet disposed along the second direction, wherein a second magnetic gap is formed between the second inner magnet and the second outer magnet; wherein, The first inner magnet and the first outer magnet form the surface of the first magnetic assembly on the side facing the vibrating plate, and the second inner magnet and the second outer magnet form the surface of the second magnetic assembly on the side facing the vibrating plate.

9. The sound-generating unit as described in claim 8, 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.

10. The sound-generating unit as described in claim 8, characterized in that, Each of the aforementioned vibration units further includes a centering support plate, which is disposed at the end of the second voice coil portion away from the diaphragm. The centering support plate includes an inner fixing portion, a spring arm portion, and an outer fixing portion connected sequentially along the second direction. The inner fixing portion is connected to the second voice coil portion, the outer fixing portion is connected to the housing, and the spring arm portion connects the inner fixing portion and the outer fixing portion. In each of the magnetic circuit units, the second magnetic component includes a plurality of second outer magnets, which are arranged circumferentially along the second inner magnet. An avoidance space is formed between any two adjacent second outer magnets, and the avoidance space is used to avoid the spring arm portion of the centering support plate corresponding to it.

11. The sound-generating unit as described in claim 8, characterized in that, The first and second inner magnets have opposite magnetic pole directions, and the inner vibrating plate has a magnetically conductive part.

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

13. The sound-generating unit as described in any one of claims 1 to 7, characterized in that, The number of the accommodating spaces is two, and the number of the magnetic circuit units and the number of the vibration units are consistent with the number of the accommodating spaces and are set in a one-to-one correspondence. And / or, the housing includes 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, the second magnetic component being disposed on the second metal plate, and the conductive terminal being injection molded on the plastic bracket.

14. A sound-generating module, characterized in that, The device includes a housing and a sound-generating unit as described in any one of claims 1 to 13 housed within the housing, wherein the housing forms a sound-guiding channel and a sound-exiting hole communicating with the sound-guiding channel for each of the said vibrating units.

Images