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, including magnetic circuit system and vibration system, and magnetic circuit system includes two along first direction opposite arrangement's magnetic circuit subassembly, each magnetic circuit subassembly includes metal shell and installs the magnetic circuit unit of metal shell inboard, and each magnetic circuit unit forms a magnetic gap, and two magnetic gaps are opposite arrangement, vibration system is located between two magnetic circuit units, and vibration system includes diaphragm subassembly and the voice coil that is connected with diaphragm subassembly, and the outer edge of diaphragm subassembly is connected between two metal shells, and voice coil drives diaphragm subassembly and vibrates along first direction, and voice coil is formed by wire integration and is wound, and the both ends of voice coil along first direction are set up respectively corresponding two magnetic gaps. The utility model can reduce distortion, avoid tone quality loss, improve acoustic performance and user hearing feeling, and be favorable to improve the vibration space of diaphragm subassembly, and the sound wave radiation efficiency is high.

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] As the consumer market demands increasingly higher low-frequency sensitivity from sound-producing devices, such as miniature loudspeakers, loudspeaker compliance designs are becoming increasingly larger. However, high compliance leads to higher distortion. Currently, loudspeakers typically employ single-sided magnetic circuits. In a single-sided magnetic circuit loudspeaker, the magnetic circuit system is located on one side of the vibrating system, connected to it via a bracket. The magnetic circuit system drives the vibrating system to reciprocate, thus radiating sound waves outward. However, because the magnetic circuit system of a single-sided magnetic circuit loudspeaker is located on one side of the vibrating system, its magnetic field is non-uniform. The magnetic field lines are mainly concentrated in the middle region between the center washer and the edge washer of the magnetic circuit system. The magnetic force experienced by the voice coil during vibration varies significantly, resulting in poor flatness of the BL(x) curve, high distortion, and loss of sound quality, affecting acoustic performance and the user's listening experience. Moreover, the bracket is usually made of plastic, which has weak structural strength and occupies the vibration space of the vibrating system within the housing, leading to low sound radiation efficiency. Utility Model Content

[0003] The main purpose of this invention is to propose a sound-generating unit and a sound-generating module, which aims to solve the technical problems of high distortion and low sound radiation efficiency of existing loudspeakers.

[0004] To achieve the above objectives, this utility model proposes a sound-generating unit, the sound-generating unit comprising:

[0005] A magnetic circuit system, the magnetic circuit system including two magnetic circuit components arranged opposite to each other along a first direction; each magnetic circuit component includes a metal housing and a magnetic circuit unit installed inside the metal housing, each magnetic circuit unit forming a magnetic gap, and the two magnetic gaps being arranged opposite to each other along the first direction;

[0006] A vibration system is located between two magnetic circuit units. The vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly. The outer edge of the diaphragm assembly is connected between two metal housings. The voice coil drives the diaphragm assembly to vibrate along a first direction. The voice coil is integrally wound with a wire. The two ends of the voice coil along the first direction are respectively set to correspond to the two magnetic gaps.

[0007] In one embodiment, the metal housing is a magnetically conductive housing, including a magnetically conductive base plate and magnetically conductive side plates surrounding the outer periphery of the magnetically conductive base plate. The magnetic circuit unit is mounted on the magnetically conductive base plate, and the outer edge of the diaphragm assembly is sandwiched between the two magnetically conductive side plates. The magnetically conductive base plate, the magnetically conductive side plate, and the vibration system of each metal housing respectively form a cavity, and at least one metal housing has a sound outlet that communicates with the corresponding cavity.

[0008] In one embodiment, one of the magnetically conductive side plates or one of the magnetically conductive bottom plates has a sound outlet that communicates with the corresponding cavity, and the voice coil drives the diaphragm assembly to vibrate along the first direction and radiates sound waves outward through the sound outlet;

[0009] or,

[0010] The two magnetic side plates or the two magnetic bottom plates are respectively provided with two sound outlets that are connected to the two cavities one by one. The voice coil drives the diaphragm assembly to vibrate along the first direction and radiates sound waves outward through the two sound outlets. The two sound outlets are located on different sides of the metal shell.

[0011] In one embodiment, the two magnetically conductive side plates are joined together along the first direction, and the two magnetically conductive side plates are welded together by a plurality of welding tabs.

[0012] In one embodiment, each of the magnetically conductive side plates includes two oppositely arranged long sides and two oppositely arranged short sides;

[0013] In the two magnetically conductive side plates, the two long sides arranged on the same side are welded together by at least one welding piece, and the two short sides arranged on the same side are welded together by at least one welding piece.

[0014] And / or,

[0015] When the sound-emitting part is located on the magnetically conductive side plate, the sound-emitting part is located on one of the long sides of the magnetically conductive side plate.

[0016] In one embodiment, each magnetic circuit unit includes an inner magnet and an outer magnet distributed along a second direction perpendicular to the first direction. A magnetic gap is formed between the inner magnet and the outer magnet of each magnetic circuit unit. The inner magnet and the outer magnet of two magnetic circuit units are exposed in the sound-generating unit on the side facing the diaphragm assembly. The inner magnet and the outer magnet of each magnetic circuit unit are magnetized along the first direction, and the magnetization directions of the inner magnet and the outer magnet of each magnetic circuit unit are opposite. The magnetization directions of the inner magnets of two magnetic circuit units are opposite. The two magnetic gaps include a dense area of ​​magnetic field lines located between the two magnetic circuit units along the first direction for accommodating the voice coil.

[0017] In one embodiment, the vibration system further includes a centering support, the centering support having an inner fixing portion connected to the voice coil, an outer fixing portion connected to a metal housing disposed nearby thereon, and a spring arm portion connecting the inner fixing portion and the outer fixing portion; wherein,

[0018] The metal casing is provided with a clearance groove corresponding to the outer fixing part; and / or, the outer magnets arranged near the centering support are multiple and spaced apart, and a clearance space is formed between the multiple outer magnets to avoid the spring arm part; and / or, one of the outer fixing parts extends to provide an outer conductive part, and the outer conductive part extends out to provide a metal casing near it; and / or, the outer magnets arranged away from the centering support are annular magnets.

[0019] In one embodiment, the voice coil is an annular voice coil extending along the first direction, the voice coil having a height along the first direction and a thickness along a second direction, the first direction being perpendicular to the second direction, the height of the voice coil being greater than the thickness of the voice coil, and the thickness of the voice coil being less than the distance between the inner magnet and the outer magnet.

[0020] Alternatively, part or all of the voice coil may be located in the region of dense magnetic field lines.

[0021] In one embodiment, the diaphragm assembly includes a diaphragm and a diaphragm plate, the diaphragm being connected to the outer periphery of the diaphragm plate, the diaphragm plate including an inner diaphragm plate connected to the inner wall of the voice coil and an outer diaphragm plate connected to the outer wall of the voice coil, and the diaphragm being connected to the outer periphery of the outer diaphragm plate.

[0022] In one embodiment, the inner diaphragm includes an inner flat plate portion and an inner bent portion extending from the outer edge of the inner flat plate portion and connected to the inner wall of the voice coil; and / or,

[0023] 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; and / or

[0024] The diaphragm assembly further includes a waterproof membrane, which is connected between the inner and outer diaphragms. The waterproof membrane is attached to and wrapped around one end of the voice coil along the first direction; and / or

[0025] The diaphragm assembly also includes a metal ring, which is attached to the outer edge of the diaphragm and is disposed between the two magnetic circuit assemblies.

[0026] This utility model also proposes a sound-generating module, including a housing and a sound-generating unit as described above housed within the housing.

[0027] In one embodiment, the sound-generating module is a temple of a pair of glasses, and the thickness direction of the temple is along the first direction.

[0028] Compared to existing single-sided magnetic circuit loudspeakers, the magnetic circuit system in the speaker unit of this invention includes two magnetic circuit components, forming a double-sided magnetic circuit system. These two magnetic circuit systems are positioned opposite each other on both sides of the vibrating system along a first direction. This results in a more uniform magnetic field distribution, smaller changes in the magnetic field experienced by the voice coil during vibration, a flatter BL(x) curve, reduced distortion, avoidance of sound quality loss, and improved acoustic performance and user listening experience. Furthermore, the double-sided magnetic circuit system in the speaker unit of this invention provides double the magnetic force and a higher magnetic induction intensity, resulting in a greater driving force on the voice coil, higher sound wave radiation efficiency, and better sensitivity and loudness.

[0029] Furthermore, compared to the existing method of connecting the magnetic circuit system and the vibration system in loudspeakers through a bracket, specifically an injection-molded bracket, the magnetic circuit system of the sound-generating unit in this invention uses a metal shell. The metal shell has high strength and better structural stability. Moreover, the magnetic circuit unit of the magnetic circuit assembly is set inside the metal shell, and the outer edge of the diaphragm assembly of the vibration system can be directly connected to the metal shell without the need for an additional bracket. This not only simplifies the structure and manufacturing process but also saves the space occupied by the bracket inside the metal shell, which is conducive to increasing the size of the diaphragm assembly and achieving high sound wave radiation efficiency. Attached Figure Description

[0030] 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.

[0031] Figure 1This is a schematic diagram of the assembly of a sound-emitting unit according to an embodiment of the present invention from one viewpoint.

[0032] Figure 2 This is a schematic diagram of the assembly of the sound-generating unit according to an embodiment of the present invention from another perspective;

[0033] Figure 3 This is an exploded view of a sound-emitting unit according to an embodiment of the present invention;

[0034] Figure 4 This is a cross-sectional schematic diagram of a sound-emitting unit according to an embodiment of the present invention;

[0035] Figure 5 This is an exploded view of the structure of the sound-generating unit in one embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the assembly of the vibration system in a sound-generating unit according to an embodiment of the present invention;

[0037] Figure 7 This is an exploded view of the vibration system in a sound-generating unit according to an embodiment of the present invention;

[0038] Figure 8 This is a cross-sectional schematic diagram of the vibration system in a sound-generating unit according to an embodiment of the present invention;

[0039] Figure 9 This is a cross-sectional schematic diagram of the vibration system in the sound-generating unit according to another embodiment of the present invention;

[0040] Figure 10 This is a cross-sectional schematic diagram of the vibration system in a sound-generating unit according to another embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of the magnetic field distribution of a sound-emitting unit according to an embodiment of the present invention;

[0042] Figure 12 This is a schematic diagram comparing the BL(x) curves of a sound-generating unit according to an embodiment of the present invention and a sound-generating unit in the prior art.

[0043] Figure 13 This is a schematic diagram comparing the distortion curves of a sound-generating unit according to an embodiment of the present invention and a sound-generating unit in the prior art.

[0044] Figure 14 This is a three-dimensional schematic diagram of a sound-emitting module according to an embodiment of the present invention with part of the shell removed;

[0045] Figure 15 for Figure 14 A three-dimensional schematic diagram of the sound-generating module from another perspective.

[0046] Explanation of icon numbers:

[0047] 100. Sound-generating unit; 10. Magnetic circuit assembly; 11. Metal shell; 111. Magnetic base plate; 112. Magnetic side plate; 1121. Long side; 1122. Short side; 1123. Partition; 12. Magnetic circuit unit; 121. Inner magnet; 122. Outer magnet; 13. Magnetic gap; 124. Clearance space; 14. Sound outlet; 20. Cavity; 30. Diaphragm assembly; 31. Diaphragm; 32. Inner diaphragm plate; 321. Inner flat plate section; 322. Inner bent section; 33. Outer diaphragm plate; 331. Outer flat plate. 332. Outer bending part; 34. Waterproof membrane; 35. Metal ring; 36. Inner rubber ring; 37. Outer rubber ring; 40. Voice coil; 41. Vibrating end; 50. Centering support plate; 51. Centering part; 511. Inner fixing part; 512. Spring arm part; 513. Outer fixing part; 514. Outer conductive part; 60. Welding piece; 61. Separation groove; 70. Clearance groove; 200. Sound generating module; 201. First side surface; 202. Second side surface; 203. Bottom surface; 204. Top surface; 210. Sound outlet hole.

[0048] 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

[0049] 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.

[0050] 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.

[0051] 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.

[0052] As the consumer market demands increasingly higher low-frequency sensitivity from sound-producing devices, such as miniature loudspeakers, loudspeaker compliance designs are becoming increasingly larger. However, high compliance leads to higher distortion. Currently, loudspeakers typically employ single-sided magnetic circuits. In a single-sided magnetic circuit loudspeaker, the magnetic circuit system is located on one side of the vibrating system, connected to it via a bracket. The magnetic circuit system drives the vibrating system to reciprocate, thus radiating sound waves outward. However, because the magnetic circuit system of a single-sided magnetic circuit loudspeaker is located on one side of the vibrating system, its magnetic field is non-uniform. The magnetic field lines are mainly concentrated in the middle region between the center washer and the edge washer of the magnetic circuit system. The magnetic force experienced by the voice coil during vibration varies significantly, resulting in poor flatness of the BL(x) curve, high distortion, and loss of sound quality, affecting acoustic performance and the user's listening experience. Moreover, the bracket is usually made of plastic, which has weak structural strength and occupies the vibration space of the vibrating system within the housing, leading to low sound radiation efficiency.

[0053] Therefore, it is necessary to propose a sound-generating unit and sound-generating module that can reduce distortion, improve acoustic performance and sound radiation efficiency, so as to solve or at least alleviate the above-mentioned technical problems.

[0054] like Figures 1 to 4 As shown, in one embodiment, the sound-generating unit 100 includes a magnetic circuit system and a vibration system. The magnetic circuit system includes two magnetic circuit components 10 arranged opposite each other along a first direction. Each magnetic circuit component 10 includes a metal housing 11 and a magnetic circuit unit 12 installed inside the metal housing 11. Each magnetic circuit unit 12 forms a magnetic gap 13, and the two magnetic gaps 13 are arranged opposite each other along the first direction. The vibration system is located between the two magnetic circuit units 12. The vibration system includes a diaphragm assembly 30 and a voice coil 40 connected to the diaphragm assembly 30. The outer edge of the diaphragm assembly 30 is connected between the two metal housings 11. The voice coil 40 drives the diaphragm assembly 30 to vibrate along the first direction. The voice coil 40 is integrally wound with a wire, and the two ends of the voice coil 40 along the first direction are respectively arranged corresponding to the two magnetic gaps 13.

[0055] The sound-generating unit 100 of this utility model can be a miniature loudspeaker unit. The sound-generating unit 100 can be used in a sound-generating module, which can be a loudspeaker module, a computer, a mobile phone, a smartwatch, smart glasses, or other smart wearable devices. This embodiment uses the sound-generating unit 100 as a loudspeaker unit as an example for explanation.

[0056] In one embodiment, the first direction is Figure 1 The vertical direction is shown in the diagram. The magnetic circuit system includes two magnetic circuit components 10 arranged opposite each other in the vertical direction to form a double-sided magnetic circuit system. Each magnetic circuit component 10 has a metal housing 11 and a magnetic circuit unit 12 installed inside the metal housing 11. The vibration system is located between the two magnetic circuit units 12 and includes a diaphragm assembly 30 and a voice coil 40. The voice coil 40 is connected to the diaphragm assembly 30, and the outer edge of the diaphragm assembly 30 is connected between the two magnetic circuit components 10, realizing the assembly between the vibration system and the magnetic circuit system.

[0057] In the vibration system, the voice coil 40 is a single, integrally wound wire, which is simple in structure and easy to manufacture. The two ends of the voice coil 40 are respectively positioned to correspond to two magnetic gaps 13 in the vertical direction; that is, the upper end of the voice coil 40 corresponds to the magnetic gap 13 of the upper magnetic circuit assembly 10, and the lower end of the voice coil 40 corresponds to the magnetic gap 13 of the lower magnetic circuit assembly 10. The two magnetic circuit assemblies 10 provide driving force to the voice coil 40, causing it to vibrate in the first direction, i.e., the vertical direction, which in turn drives the diaphragm assembly 30 to vibrate in the first direction. This vibration of the system in the first direction drives the air to produce sound, completing the energy conversion between electroacoustic and radiofrequency signals.

[0058] In each magnetic circuit assembly 10, two metal housings 11 are arranged opposite each other in the vertical direction, and magnetic circuit units 12 are installed inside the corresponding metal housings 11. That is, the upper magnetic circuit unit 12 is installed inside the upper metal housing 11, and the lower magnetic circuit unit 12 is installed inside the lower metal housing 11. The two magnetic circuit units 12 are arranged opposite each other in the first direction, that is, in the vertical direction. Each magnetic circuit unit 12 forms a magnetic gap 13, and the two magnetic gaps 13 are arranged opposite each other in the vertical direction. The vibration system is located between the two magnetic circuit units 12 to provide double the magnetic force to the voice coil 40 through the two magnetic circuit units 12, thereby increasing the driving force on the voice coil 40.

[0059] like Figures 11 to 13As shown, compared with existing single-sided magnetic circuit loudspeakers, the magnetic circuit system of the sound-generating unit 100 of this invention includes two magnetic circuit components 10, forming a double-sided magnetic circuit system. The two magnetic circuit systems are arranged opposite each other on both sides of the vibration system along a first direction. This not only results in a more uniform magnetic field distribution, but also minimizes the change in magnetic field experienced by the voice coil 40 during vibration, leading to a flatter BL(x) curve, reduced distortion, avoidance of sound quality loss, and improved acoustic performance and user listening experience. Furthermore, the double-sided magnetic circuit system of the sound-generating unit 100 provides double the magnetic force and a higher magnetic induction intensity, resulting in a greater driving force on the voice coil 40, higher sound wave radiation efficiency, and better sensitivity and loudness.

[0060] Furthermore, compared to the existing method of connecting the magnetic circuit system and the vibration system in loudspeakers through a bracket, specifically an injection-molded bracket, the magnetic circuit system of the sound-generating unit 100 of this invention uses a metal shell 11. The metal shell 11 has high strength and better structural stability. Moreover, the magnetic circuit unit 12 of the magnetic circuit assembly 10 is placed inside the metal shell 11, and the outer edge of the diaphragm assembly 30 of the vibration system can be directly connected to the metal shell 11 without the need for an additional bracket. This not only simplifies the structure and manufacturing process, but also saves the space occupied by the bracket inside the metal shell 11, which is conducive to improving the vibration space of the diaphragm assembly 30 and resulting in high sound wave radiation efficiency.

[0061] In one embodiment, the metal shell 11 is integrally stamped, which is simple to manufacture, easy to produce, and has a high degree of automation in stamping, thus having a certain cost advantage.

[0062] In one embodiment, the metal shell 11 may be made of SPCC (Steel Plate Cold rolled Commercial) or SUS430 material. SPCC and SUS430 (Steel Use Stainless 430) materials not only have high magnetic permeability, which can improve the magnetic permeability of the metal shell 11, but also the metal shell 11 has high strength and better structural stability.

[0063] like Figures 2 to 5 As shown, in one embodiment, the metal casing 11 is a magnetically conductive casing, including a magnetically conductive base plate 111 and magnetically conductive side plates 112 surrounding the outer periphery of the magnetically conductive base plate 111. The magnetic circuit unit 12 is mounted on the magnetically conductive base plate 111, and the outer edge of the diaphragm assembly 30 is sandwiched between the two magnetically conductive side plates 112. The magnetically conductive base plate 111, the magnetically conductive side plates 112 of each metal casing 11 and the vibration system respectively form a cavity 20, and at least one metal casing 11 has a sound outlet that communicates with the corresponding cavity 20. Optionally, each sound outlet includes at least one sound outlet hole 14.

[0064] Understandably, both metal housings 11 are magnetically conductive, and their magnetically conductive base plate 111 and magnetically conductive side plate 112 both have magnetic conductivity to correct the magnetic field lines of the corresponding magnetic circuit unit 12, further improving magnetic field uniformity and reducing nonlinear distortion. The outer edge of the diaphragm assembly 30 is sandwiched between the two magnetically conductive side plates 112 to achieve stable assembly between the vibration system and the magnetic circuit system.

[0065] The magnetically conductive base plate 111 and magnetically conductive side plate 112 of the upper metal shell 11 form an upper cavity 20 with the vibration system, and the magnetically conductive base plate 111 and magnetically conductive side plate 112 of the lower metal shell 11 form another lower cavity 20 with the vibration system. Understandably, this invention eliminates the need for an additional support structure and saves space within the metal shell 11 occupied by the support structure, allowing for a larger cavity 20 volume. This facilitates increased vibration space for the diaphragm assembly 30 and results in high sound wave radiation efficiency.

[0066] In one embodiment, one of the metal housings 11 has a sound outlet communicating with the corresponding cavity 20. In one example, the upper metal housing 11 has a sound outlet communicating with the upper cavity 20, which, when the voice coil 40 drives the diaphragm assembly 30 to vibrate in a first direction, can agitate the air inside the upper cavity 20 and radiate sound waves outward through the sound outlet of the upper metal housing 11. In another example, the lower metal housing 11 has another sound outlet communicating with the lower cavity 20, which, when the voice coil 40 drives the diaphragm assembly 30 to vibrate in the first direction, can agitate the air inside the lower cavity 20 and radiate sound waves outward through the other sound outlet of the lower metal housing 11.

[0067] In another embodiment, each of the two metal housings 11 has a sound outlet communicating with its corresponding cavity 20. Specifically, the upper metal housing 11 has a sound outlet communicating with the upper cavity 20, and the lower metal housing 11 has another sound outlet communicating with the lower cavity 20. When the voice coil 40 drives the diaphragm assembly 30 to vibrate along the first direction, it stimulates the air within the two cavities 20 to radiate sound waves outward through the two sound outlets. Understandably, the two sound outlets can radiate sound waves of opposite phases, creating a dipole effect and providing far-field noise reduction, thus helping to protect the user's privacy.

[0068] In one embodiment, one of the magnetically conductive side plates 112 or one of the magnetically conductive bottom plates 111 has a sound outlet communicating with the corresponding cavity 20. The voice coil 40 drives the diaphragm assembly 30 to vibrate along a first direction and radiates sound waves outward through the sound outlet. Understandably, in one example, the magnetically conductive side plate 112 of the upper metal shell 11 has a sound outlet communicating with the upper cavity 20, or the magnetically conductive side plate 112 of the lower metal shell 11 has a sound outlet communicating with the lower cavity 20, achieving a side-emitting sound effect. In another example, the magnetically conductive bottom plate 111 of the upper metal shell 11 has a sound outlet communicating with the upper cavity 20, or the magnetically conductive bottom plate 111 of the lower metal shell 11 has a sound outlet communicating with the lower cavity 20, achieving front-emitting sound, smoother airflow, improved sound quality, and applicability to different scenarios.

[0069] In another embodiment, the two magnetic side plates 112 or the two magnetic bottom plates 111 are respectively provided with two sound outlets that are connected to the two cavities 20 one by one. The voice coil 40 drives the diaphragm assembly 30 to vibrate along the first direction and radiates sound waves outward through the two sound outlets. The two sound outlets are located on different sides of the metal shell 11.

[0070] In one example, the magnetically conductive side plate 112 of the upper metal shell 11 has a sound outlet communicating with the upper cavity 20, and the magnetically conductive side plate 112 of the lower metal shell 11 has a sound outlet communicating with the lower cavity 20. When the voice coil 40 drives the diaphragm assembly 30 to vibrate in the first direction, it drives the air in the two cavities 20 to radiate sound waves of opposite phases outward through the two sound outlets, which can form a dipole effect and has a far-field noise reduction effect, which helps to protect the user's privacy.

[0071] The two sound outlets are located on different sides of the metal casing 11, such as Figure 1 and Figure 2 As shown, one of the upper sound outlets is located on the left side of the upper metal casing 11, while the other sound outlet is located on the right side of the lower metal casing 11, in order to enhance the symmetry of sound wave radiation and increase the uniformity of sound wave diffusion, resulting in a wider listening area.

[0072] In one embodiment, two magnetically conductive side plates 112 are arranged opposite each other along a first direction, and the two magnetically conductive side plates 112 are welded together by a plurality of welding tabs 60. The two magnetically conductive side plates 112 are arranged opposite each other in a vertical direction and clamp the outer edge of the diaphragm assembly 30, thereby achieving stable assembly of the vibration system and the magnetic circuit system. Furthermore, the welding together of the two magnetically conductive side plates 112 by a plurality of welding tabs 60 improves the connection stability between the two metal housings 11.

[0073] Specifically, each magnetically conductive side plate 112 includes two oppositely arranged long sides 1121 and two oppositely arranged short sides 1122. For example... Figures 1 to 5 As shown, the two long sides 1121 are arranged opposite each other in the left-right direction, and the two short sides 1122 are arranged opposite each other in the front-back direction. The two short sides 1122 are connected between the two long sides 1121 to form a side plate 112 surrounding the outer periphery of the base plate 111.

[0074] In one embodiment, in the two magnetically conductive side plates 112, the two long sides 1121 on the same side are welded together by at least one welding piece 60, and the two short sides 1122 on the same side are welded together by at least one welding piece 60. For example... Figures 1 to 4 As shown, in the two magnetically conductive side plates 112 arranged vertically, the two long sides 1121 on the left are welded together by a welding piece 60, the two long sides 1121 on the right are welded together by a welding piece 60, the two short sides 1122 on the front are welded together by a welding piece 60, and the two short sides 1122 on the rear are welded together by a welding piece 60, thereby achieving multi-directional fixation between the two metal shells and further improving the connection stability between the two metal shells 11.

[0075] Multiple welded pieces 60 can be integrally formed during the manufacturing process. A connecting rib can be reserved between two adjacent welded pieces 60 to maintain the integrity during the manufacturing process. A separation groove 61 is formed at the connecting rib of two adjacent welded pieces 60 so that the connecting rib can be cut manually or mechanically after the manufacturing is completed, thereby separating two adjacent welded pieces 60 and making multiple welded pieces 60, thus improving production efficiency.

[0076] In one embodiment, when the sound-emitting part is opened on the magnetically conductive side plate 112, the sound-emitting part is opened on the long side 1121 of the magnetically conductive side plate 112.

[0077] Understandably, the long side 1121 of the magnetically conductive side plate 112 has a sound outlet to facilitate adjustment of the sound outlet size. For example... Figure 1 and Figure 2 As shown, two sound outlet holes 14 are provided on the left long side 1121 of the upper magnetic side plate 112, forming a sound outlet on the left side of the upper metal shell 11. Two sound outlet holes 14 are provided on the right long side 1121 of the lower magnetic side plate 112, forming a sound outlet on the right side of the lower metal shell 11. The two sound outlets are located on different sides of the two metal shells 11 to enhance the symmetry of sound wave radiation and increase the uniformity of sound wave diffusion, resulting in a wider listening area.

[0078] In one embodiment, the metal casing 11 forms a partition 1123 between any two adjacent sound outlets 14 in a set of sound outlets 14, so as to separate the two adjacent sound outlets 14 by means of the partition 1123, and the partition 1123 can be welded to a welding piece 60 to provide a welding area for the welding piece 60, and increase the contact area with the welding piece 60, thereby improving the welding convenience and firmness.

[0079] In one embodiment, each magnetic circuit unit 12 includes an inner magnet 121 and an outer magnet 122 distributed along a second direction, with a magnetic gap 13 formed between the inner magnet 121 and the outer magnet 122. The two magnetic gaps 13 are arranged opposite to each other along a first direction. The inner magnet 121 and the outer magnet 122 of the two magnetic circuit units 12 are exposed in the sound-generating unit 100 on the side facing the diaphragm assembly 30. The two magnetic gaps 13 include a dense area of ​​magnetic field lines located between the two magnetic circuit units 12 along the first direction for accommodating the voice coil 40. The second direction is perpendicular to the first direction.

[0080] In this embodiment, a magnetic field region with a relatively long vertical distribution and relatively uniform magnetic field lines is formed in the area between the two magnetic circuit units 12 along the first direction, i.e., a dense magnetic field line region is formed. This results in more and denser magnetic field lines passing through the voice coil 40, leading to a greater driving force. This provides the voice coil 40 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. Figures 11 to 13 As shown. Furthermore, compared to the structure where magnetic guide plates are placed on the side of the inner and outer magnets of the two magnetic circuit units facing the diaphragm assembly 30, where the magnetic guide plates concentrate magnetic field lines, resulting in uneven distribution of magnetic field lines in the area corresponding to the magnetic guide plates, this embodiment eliminates the magnetic guide plates in the speaker unit 100. This results in a more uniform distribution of magnetic field lines corresponding to the voice coil 40, smaller changes in the magnetic field during vibration of the voice coil 40, a flatter BL(x) curve, better vibration consistency, effectively reduced distortion, and avoidance of sound quality loss. Moreover, eliminating the use of magnetic guide plates allows for a further reduction in the size of the speaker unit 100 along the first direction, facilitating a thinner design.

[0081] In one embodiment, the inner magnet 121 and the outer magnet 122 of each magnetic circuit unit 12 are magnetized along a first direction, and the magnetization directions of the inner magnet 121 and the outer magnet 122 of each magnetic circuit unit 12 are opposite, and the magnetization directions of the inner magnet 121 of two magnetic circuit units 12 are opposite. The magnetic field lines of the inner magnets 121 of the two magnetic circuit units 12 repel each other, and the magnetic field lines of the outer magnets 122 of the two magnetic circuit units 12 repel each other. The magnetic field lines generated by the inner magnets 121 and outer magnets 122 of each magnetic circuit unit 12 form a closed loop. The region between the two magnetic circuit units 12 along the first direction has magnetic field lines passing through the voice coil 40, forming a relatively long vertical magnetic field region with a relatively uniform distribution of magnetic field lines. This results in more and denser magnetic field lines passing through the voice coil 40, leading to a greater driving force. This provides the voice coil 40 with a large and slowly changing flat driving force, thereby achieving a superlinear BL(x) design and reducing the risk of distortion. Figures 11 to 13 As shown.

[0082] In one embodiment, the two magnetic circuit units 12 are symmetrically arranged relative to the diaphragm assembly 30, which helps to improve the uniformity of the magnetic field distribution and the symmetry in the vertical direction, resulting in a better flatness of the BL(x) curve.

[0083] In one embodiment, the inner magnets 121 of the two magnetic circuit units 12 are opposite each other and have the same size, and the outer magnets 122 of the two magnetic circuit units 12 are opposite each other and have the same size. This helps to improve the uniformity of the magnetic field distribution and the symmetry in the vertical direction, resulting in a better flatness of the BL(x) curve; at the same time, there are fewer component models, making it easier to process and assemble.

[0084] In one embodiment, the vibration system further includes a centering support 50, which has an inner fixing part 511 connected to the voice coil 40, an outer fixing part 513 connected to a metal housing 11 disposed nearby thereon, and a spring arm part 512 connecting the inner fixing part 511 and the outer fixing part 513; wherein the metal housing 11 is provided with a relief groove 70 corresponding to the outer fixing part 513 to avoid interference.

[0085] like Figures 1 to 4 As shown, the centering support 50 includes an inner fixing part 511, an outer fixing part 513, and a spring arm part 512. The inner fixing part 511 is connected to the voice coil 40, the outer fixing part 513 is connected to the metal housing 11, and the spring arm part 512 can deform and connect the inner fixing part 511 and the outer fixing part 513. The centering support 50 plays a role in centering and supporting the voice coil 40, preventing the voice coil 40 from being polarized, and improving the vibration stability of the voice coil 40.

[0086] In one embodiment, the external magnets 122 disposed near the centering support plate 50 include a plurality of magnets arranged at intervals, and the plurality of external magnets 122 form a clearance space 124 for the clearance arm portion 512. Figure 4 As shown, the centering support 50 is connected to the upper end of the voice coil 40 and is located near the upper magnetic circuit assembly 10. The upper magnetic circuit assembly 10 includes a plurality of spaced external magnets 122, and the plurality of external magnets 122 form a clearance space 124 for the clearance spring arm portion 512 to avoid interference with the centering support 50.

[0087] In the sound-generating unit 100 of this utility model, the structure of the outer magnet 122 in the magnetic circuit unit 12 can be flexibly set according to actual needs, for example:

[0088] In one embodiment, each of the two magnetic circuit units 12 includes multiple outer magnets 122, and the multiple outer magnets 122 are distributed circumferentially along the corresponding inner magnets 121; the multiple outer magnets 122 of the two magnetic circuit units 12 are arranged one-to-one in a first direction.

[0089] Specifically, in one example, each of the two magnetic circuit units 12 includes four outer magnets 122. These four outer magnets 122 are distributed circumferentially around the corresponding inner magnets 121, positioned at the front, back, left, and right of the corresponding inner magnets 121. The spaced distribution of the four outer magnets 122 forms a clearance space 124 to avoid interference with the centering support 50's spring arm portion 512. The four upper outer magnets 122 are arranged in a one-to-one correspondence with the four lower outer magnets 122, improving magnetic field uniformity. Figures 3 to 5 As shown, in another example, each of the two magnetic circuit units 12 includes two outer magnets 122. The two outer magnets 122 are respectively disposed on opposite sides of the corresponding inner magnet 121, and the two outer magnets 122 are spaced apart to form a clearance space 124 to avoid interference with the centering support plate 50. The two upper outer magnets 122 are arranged in a one-to-one correspondence with the two lower outer magnets 122 to improve the uniformity of the magnetic field.

[0090] In other embodiments, the outer magnet 122 located away from the centering support 50 is a ring magnet. Specifically, the outer magnet 122 of the lower magnetic circuit unit 12 can be a ring magnet, and the upper magnetic circuit unit 12 has multiple outer magnets 122. The lower ring magnet is arranged opposite to the multiple upper outer magnets 122 to improve the uniformity of the magnetic field. The multiple outer magnets 122 of the upper magnetic circuit unit 12 are spaced apart to form a clearance space 124 to avoid interference with the centering support 50.

[0091] In one embodiment, one of the external fixing portions 513 extends to have an external conductive portion 514, which extends outward from a metal housing 11 disposed nearby. The external conductive portion 514 may be an FPCB.

[0092] like Figure 3 As shown, the centering support 50 includes two separate centering parts 51, which are arranged along the front-rear direction. Each centering part 51 includes an inner fixing part 511, an outer fixing part 513, and a spring arm part 512. One of the centering parts 51, for example, the outer fixing part 513 of the front centering part 51, extends to include an outer conductive part 514. The outer conductive part 514 extends beyond the upper metal casing 11, specifically beyond the short side 1122 of the upper metal casing 11, to achieve connection with an external circuit. To avoid interference with the outer conductive part 514, both the short side 1122 and the welding piece 60 at the front are provided with clearance grooves 70 to avoid interference with the outer conductive part 514.

[0093] In one embodiment, the voice coil 40 is an annular voice coil extending along a first direction. The voice coil 40 has a height along the first direction and a thickness along a second direction, where the first direction is perpendicular to the second direction. The height of the voice coil 40 is greater than its thickness. It should be noted that the thickness of the voice coil 40 is the distance between the inner and outer walls of the annular voice coil. In this embodiment, the height of the voice coil 40 is greater than its thickness. During vibration, especially under conditions of large vibration amplitude, it is less affected by changes in the magnetic field, resulting in a significantly flatter BL(x) curve, significantly reducing distortion in the driver 100, and improving sound quality. The voice coil 40 in 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 40 can range from 1.1:1 to 10:1, specifically ratios such as 1.1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, and 10:1, which the user can select according to their actual needs.

[0094] Furthermore, the thickness of the voice coil 40 is less than the distance between the inner magnet 121 and the outer magnet 122. Thus, during vibration, the two ends of the voice coil 40 extend into the gap between the inner magnet 121 and the outer magnet 122 along the first direction. The gap between the inner magnet 121 and the outer magnet 122 acts as a buffer for the voice coil 40, ensuring the vibration amplitude of the voice coil 40 while maintaining a certain thickness of the sound-generating unit 100. Alternatively, while maintaining a certain vibration amplitude of the voice coil 40, the thickness of the sound-generating unit 100 can be reduced, facilitating a thinner design.

[0095] In one embodiment, the voice coil 40 may be partially or entirely located in a region of dense magnetic field lines. Specifically, the entire voice coil 40 may be located in a region of dense magnetic field lines; or, a portion of the voice coil 40 may be located in a region of dense magnetic field lines, with the other portion extending into the gap between the inner magnet 121 and the outer magnet 122. These positional relationships pertain to the assembled state of the sound-generating unit. With a portion of the voice coil 40 extending into the gap between the inner magnet 121 and the outer magnet 122, the voice coil 40 has a larger height, further reducing 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. Alternatively, the voice coil 40 may be entirely located in a region of dense magnetic field lines, further reducing the height of the sound-generating unit 100 while still meeting performance requirements.

[0096] In one embodiment, the diaphragm assembly 30 includes a diaphragm 31 and a vibrating plate. The diaphragm 31 is disposed around the vibrating plate. The vibrating plate includes an inner vibrating plate 32 connected to the inner wall of the voice coil 40 and an outer vibrating plate 33 connected to the outer wall of the voice coil 40. The outer edge of the outer vibrating plate 33 is connected to the inner edge of the diaphragm 31, thereby realizing the assembly of the diaphragm 31, the voice coil 40, and the vibrating plate. Specifically, as shown... Figure 4 , Figures 8 to 10 As shown, the outer vibrating plate 33 can be connected to the lower side of the diaphragm 31. The arrangement of the inner vibrating plate 32 and the outer vibrating plate 33 can reasonably improve the overall strength of the vibration system and avoid distortion caused by excessive compliance.

[0097] like Figure 8 As shown, during the assembly process of the vibration system, the outer diaphragm 33 is bonded to the outer wall of the voice coil 40 by applying adhesive to form an outer rubber ring 37 that bonds the outer diaphragm 33 to the outer wall of the voice coil 40. The inner diaphragm 32 is bonded to the inner wall of the voice coil 40 by applying adhesive to form an inner rubber ring 36 that bonds the inner diaphragm 32 to the voice coil 40.

[0098] In one embodiment, such as Figure 9 As shown, the inner diaphragm 32 includes an inner flat plate portion 321 and an inner bent portion that extends from the outer edge of the inner flat plate portion 321 and connects to the inner wall of the voice coil 40. Specifically, the inner bent portion 322 is formed by bending the outer edge of the inner flat plate portion 321 along a first direction, i.e., vertically, and forms a glue-applying groove between it and the inner wall of the voice coil 40, thereby increasing the amount of glue stored and the connection area between the two and preventing glue overflow, thus improving the assembly stability of the inner diaphragm 32 and the voice coil 40.

[0099] In one embodiment, such as Figure 9As shown, the outer diaphragm 33 includes an outer flat plate portion 331 and an outer bent portion that extends from the inner edge of the outer flat plate portion 331 and connects to the outer wall of the voice coil 40. Specifically, the outer bent portion 332 is formed by bending the inner edge of the outer flat plate portion 331 along a first direction, i.e., along the vertical direction, and forms a glue-applying groove with the outer wall of the voice coil 40, thereby increasing the amount of glue stored and the connection area between the two and preventing glue overflow, thus improving the assembly stability of the outer diaphragm 33 and the voice coil 40.

[0100] In one embodiment, the diaphragm assembly 30 further includes a waterproof membrane 34, which connects the inner diaphragm 32 and the outer diaphragm 33. The waterproof membrane 34 is attached to and wraps around one end of the voice coil 40 along a first direction. Specifically, as shown in the example... Figure 10 As shown, the waterproof membrane 34 is attached to and wrapped around the lower end of the voice coil 40, which serves to waterproof the unit and improve the waterproof performance and level of the sound-generating unit 100.

[0101] In one embodiment, the diaphragm assembly 30 further includes a metal ring 35, which is attached to the outer edge of the diaphragm 31 and disposed between the two magnetic circuit assemblies 10. In the diaphragm assembly 30, the outer edge of the diaphragm 31 is sandwiched between the side plates 112 of the two metal housings 11. The metal ring 35 on the outer edge of the diaphragm 31 facilitates stable support for the diaphragm 31, facilitates the removal and placement of the diaphragm 31 during use, and improves the stability of the assembly between the two metal housings 11 and the diaphragm assembly 30.

[0102] It should be noted that, in order to avoid interfering with magnetic field lines, neither the welding piece 60 nor the metal ring 35 has magnetic permeability.

[0103] In the sound-generating unit 100 of this invention, the inner vibrating plate 32 of the diaphragm assembly 30 has a magnetically conductive part. During vibration, due to the magnetic conductivity of the magnetically conductive part, the inner vibrating plate 32 can be attracted by the two magnetic circuit units 12. Specifically, when the inner vibrating plate 32 vibrates upward, the resultant force of the attraction of the two magnetic circuit units 12 on the magnetically conductive part points upward, which is beneficial to assisting the inner vibrating plate 32 to vibrate upward. When the inner vibrating plate 32 vibrates downward, the resultant force of the attraction of the two magnetic circuit units 12 on the magnetically conductive part points downward, which is beneficial to assisting the inner vibrating plate 32 to vibrate downward. Thus, the design of the magnetically conductive part can assist the vibration of the inner vibrating plate 32 and improve the sound generation effect.

[0104] In one embodiment, the inner vibrating plate 32 is a magnetically conductive plate to form a magnetically conductive part. That is, the inner vibrating plate 32 itself is a magnetically conductive plate to form a magnetically conductive part, without the need to set other magnetically conductive parts, and the structure is simple.

[0105] In another embodiment, a magnetic conductive element is embedded inside the inner vibrating plate 32 to form a magnetic conductive portion. Embedding the magnetic conductive element inside the inner vibrating plate 32 results in a consistent and compact structure.

[0106] In another embodiment, the inner vibrating plate 32 has a magnetically conductive element on at least one side along the first direction to form a magnetically conductive portion. For example, a magnetically conductive element is provided on the upper side of the inner vibrating plate 32. Alternatively, a magnetically conductive element is provided on the lower side of the inner vibrating plate 32. Yet another example is that magnetically conductive elements are provided on both the upper and lower sides of the inner vibrating plate 32.

[0107] In another embodiment, at least one surface of the inner vibrating plate 32 along the first direction is coated with a magnetically conductive material to form a magnetically conductive portion. For example, the upper surface of the inner vibrating plate 32 is coated with a magnetically conductive material. Alternatively, the lower surface of the inner vibrating plate 32 is coated with a magnetically conductive material. Yet another example is that both the upper and lower surfaces of the inner vibrating plate 32 are coated with a magnetically conductive material.

[0108] In the sound-generating unit 100 of this utility model, the formation and position of the magnetic conductive part can be set according to actual needs, and the setting method is diverse and highly flexible.

[0109] This utility model also proposes a sound-generating module 200, including a housing and a sound-generating unit 100 as described above housed within the housing. The sound-generating module can be a speaker module or used in electronic devices such as computers, mobile phones, and smart wearable devices.

[0110] In one embodiment, such as Figure 14 and Figure 15 As shown, the sound-generating module 200 is the temple of the glasses, and the thickness direction of the temple is along the first direction.

[0111] It should be noted that in this embodiment, the thickness direction of the temple is along the first direction, so that the two magnetic circuit components 10 of the sound-generating unit 100 are arranged opposite each other along the thickness direction of the temple. Compared with the magnetic circuit components being arranged along the height direction (perpendicular to the thickness direction), this solution occupies less space in the thickness direction, which can make the whole product thinner and improve the comfort of the user when wearing the temple of this application.

[0112] In one embodiment, the housing has a first side surface 201 and a second side surface 202 opposite to each other in the thickness direction, and a bottom surface 203 and a top surface 204 connected between the first side surface 201 and the second side surface 202, the bottom surface 203 facing the user's ear, and at least one sound outlet 210 located on the bottom surface 203.

[0113] In one embodiment, when the metal casing of the sound-generating unit 100 has two sound-emitting parts that are respectively connected to the cavities on both sides of the diaphragm assembly, the casing has two sound outlets 210 that are respectively connected to the two sound-emitting parts, wherein the first side surface 201 faces the side of the user's head, and the other sound outlet 210 is located on the top surface 204 or the second side surface 202. In this way, the two sound outlets 210 are located on different surfaces, which reduces interference between the sound waves of the two sound outlets 210 at close range (near the user's ear) and still has a mutual cancellation effect at a distance, thus improving the user experience.

[0114] The specific structure of the sound-generating unit 100 in the sound-generating module is as described in the above embodiments. Since this sound-generating module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0115] The above are merely preferred embodiments of this utility model and do not limit the scope of protection of this utility model. Any equivalent structural transformations made based on the technical 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 scope of protection of this utility model.

Claims

1. A sound-emitting monomer, characterized in that, The sound-generating unit includes: A magnetic circuit system, the magnetic circuit system including two magnetic circuit components arranged opposite to each other along a first direction; each magnetic circuit component includes a metal housing and a magnetic circuit unit installed inside the metal housing, each magnetic circuit unit forming a magnetic gap, and the two magnetic gaps being arranged opposite to each other along the first direction; A vibration system is located between two magnetic circuit units. The vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly. The outer edge of the diaphragm assembly is connected between two metal housings. The voice coil drives the diaphragm assembly to vibrate along a first direction. The voice coil is integrally wound with a wire. The two ends of the voice coil along the first direction are respectively set to correspond to the two magnetic gaps.

2. The sound-generating unit as described in claim 1, characterized in that, The metal shell is a magnetically conductive shell, including a magnetically conductive base plate and magnetically conductive side plates surrounding the outer periphery of the magnetically conductive base plate. The magnetic circuit unit is installed on the magnetically conductive base plate. The outer edge of the diaphragm assembly is sandwiched between the two magnetically conductive side plates. The magnetically conductive base plate, the magnetically conductive side plate, and the vibration system of each metal shell respectively form a cavity, and at least one metal shell has a sound outlet that communicates with the corresponding cavity.

3. The sound-generating unit as described in claim 2, characterized in that, One of the magnetically conductive side plates or one of the magnetically conductive bottom plates has a sound outlet that communicates with the corresponding cavity. The voice coil drives the diaphragm assembly to vibrate along the first direction and radiates sound waves outward through the sound outlet. or, The two magnetic side plates or the two magnetic bottom plates are respectively provided with two sound outlets that are connected to the two cavities one by one. The voice coil drives the diaphragm assembly to vibrate along the first direction and radiates sound waves outward through the two sound outlets. The two sound outlets are located on different sides of the metal shell.

4. The sound-generating unit as described in claim 2, characterized in that, The two magnetically conductive side plates are joined together along the first direction, and the two magnetically conductive side plates are welded together by multiple welding pieces.

5. The sound-generating unit as described in claim 4, characterized in that, Each of the magnetically conductive side plates includes two oppositely arranged long sides and two oppositely arranged short sides; In the two magnetically conductive side plates, the two long sides arranged on the same side are welded together by at least one welding piece, and the two short sides arranged on the same side are welded together by at least one welding piece. And / or, When the sound-emitting part is located on the magnetically conductive side plate, the sound-emitting part is located on one of the long sides of the magnetically conductive side plate.

6. The sound-generating unit according to any one of claims 1 to 5, characterized in that, Each of the magnetic circuit units includes an inner magnet and an outer magnet distributed along a second direction, which is perpendicular to the first direction. A magnetic gap is formed between the inner magnet and the outer magnet of each magnetic circuit unit. The inner magnet and the outer magnet of two magnetic circuit units are exposed in the sound-generating unit on the side facing the diaphragm assembly. The inner magnet and the outer magnet of each magnetic circuit unit are magnetized along the first direction, and the magnetization directions of the inner magnet and the outer magnet of each magnetic circuit unit are opposite. The magnetization directions of the inner magnets of two magnetic circuit units are opposite. The two magnetic gaps include a dense area of ​​magnetic field lines located between the two magnetic circuit units along the first direction for accommodating the voice coil.

7. The sound-generating unit as described in claim 6, characterized in that, The vibration system further includes a centering support, which has an inner fixing portion connected to the voice coil, an outer fixing portion connected to a metal housing disposed nearby thereon, and a spring arm portion connecting the inner fixing portion and the outer fixing portion; wherein... The metal casing is provided with a clearance groove corresponding to the outer fixing part; and / or, the outer magnets arranged near the centering support are multiple and spaced apart, and a clearance space is formed between the multiple outer magnets to avoid the spring arm part; and / or, one of the outer fixing parts extends to provide an outer conductive part, and the outer conductive part extends out to provide a metal casing near it; and / or, the outer magnets arranged away from the centering support are annular magnets.

8. The sound-generating unit as described in claim 6, characterized in that, The voice coil is an annular voice coil extending along the first direction. The voice coil has a height along the first direction and a thickness along the second direction. The first direction is perpendicular to the second direction. The height of the voice coil is greater than the thickness of the voice coil, and the thickness of the voice coil is less than the distance between the inner magnet and the outer magnet. Alternatively, part or all of the voice coil may be located in the region of dense magnetic field lines.

9. The sound-generating unit as described in any one of claims 1 to 5, characterized in that, The diaphragm assembly includes a diaphragm and a diaphragm plate. The diaphragm is connected to the outer periphery of the diaphragm plate. The diaphragm plate includes an inner diaphragm plate connected to the inner wall of the voice coil and an outer diaphragm plate connected to the outer wall of the voice coil. The diaphragm is connected to the outer periphery of the outer diaphragm plate.

10. The sound-generating unit as described in claim 9, characterized in that, 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; and / or The diaphragm assembly further includes a waterproof membrane, which is connected between the inner and outer diaphragms. The waterproof membrane is attached to and wrapped around one end of the voice coil along the first direction; and / or The diaphragm assembly also includes a metal ring, which is attached to the outer edge of the diaphragm and is disposed between the two magnetic circuit assemblies.

11. A sound-generating module, characterized in that, It includes a housing and a sound-generating unit as described in any one of claims 1 to 10, housed within the housing.

12. The sound-generating module as described in claim 11, characterized in that, The sound-generating module is a temple of a pair of glasses, and the thickness direction of the temple is along the first direction.

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