Sound-producing monomer and electronic device

Abstract

The application discloses a sound production monomer and an electronic device. The sound production monomer comprises a magnetic circuit system, a vibration system and a shell. The magnetic circuit system comprises a magnetic yoke and a magnet assembly arranged on the magnetic yoke. The magnet assembly forms a magnetic gap. The magnet assembly comprises a first magnet, a second magnet, a third magnet and a fourth magnet. The first magnet and the third magnet are magnetized along a second direction and the magnetization directions are opposite. The second magnet and the fourth magnet are magnetized along a first direction. The first direction is perpendicular to the second direction. The polarity of the magnetic pole of the second magnet facing the first magnet is the same as the polarity of the magnetic pole of the first magnet close to the magnetic gap. The polarity of the magnetic pole of the fourth magnet facing the third magnet is the same as the polarity of the magnetic pole of the third magnet close to the magnetic gap, so that the magnet assembly forms a magnetic field enhancement side facing the magnetic gap. The vibration system comprises a diaphragm and a flat voice coil. The magnet assembly forms a magnetic field enhancement side facing the magnetic gap, which improves the magnetic field driving force and the acoustic performance of the loudspeaker.

Description

Technical Field

[0001] This invention relates to the field of sound energy conversion technology, and in particular to a sound-generating unit and an electronic device. Background Technology

[0002] As smart wearable products become thinner, the space left for speakers is gradually decreasing while the installation space for other components remains the same. This makes it difficult to improve the acoustic performance of speakers by increasing their size. The limited internal space restricts the acoustic performance of existing speakers, making it difficult to improve their acoustic performance and thus failing to meet users' needs. Summary of the Invention

[0003] The main objective of this invention is to propose a sound-generating unit and electronic device that aims to solve the problem of how to improve the acoustic performance of a loudspeaker.

[0004] To achieve the above objectives, the present invention proposes a sound-emitting unit, wherein the aspect ratio of the sound-emitting unit is greater than 2:1, and the sound-emitting unit comprises:

[0005] A magnetic circuit system includes a magnetic yoke and two magnet assemblies spaced apart from each other on the magnetic yoke, with a magnetic gap formed between the two magnet assemblies. Each magnet assembly includes a first magnet, a second magnet, a third magnet, and a fourth magnet arranged sequentially along a first direction, with the fourth magnet disposed on the magnetic yoke. The first magnet and the third magnet are both magnetized along a second direction but in opposite directions. The first direction is perpendicular to the second direction. The second magnet and the fourth magnet are both magnetized along the first direction. The polarity of the second magnet's pole facing the first magnet is the same as the polarity of the first magnet's pole near the magnetic gap. The polarity of the fourth magnet's pole facing the third magnet is the same as the polarity of the third magnet's pole near the magnetic gap, so that each magnet assembly can form a magnetic field enhancement side facing the magnetic gap. Furthermore, the polarities of the two first magnets' poles near the magnetic gap are opposite.

[0006] A vibration system, the vibration system including a diaphragm and a flat voice coil for driving the diaphragm to vibrate along a first direction, the flat voice coil being connected to the diaphragm and located within the magnetic gap, the axial direction of the flat voice coil being arranged along a second direction;

[0007] A housing, the diaphragm being connected to the housing, the housing having a central portion and ends located at both ends of the central portion along the long side of the housing, the central portion protruding away from the flat voice coil.

[0008] In one embodiment, the diaphragm includes a folded ring and a reinforcing portion disposed in the central region of the folded ring, the folded ring being connected to the housing;

[0009] The folding ring, the reinforcing part, and the shell are integrally injection molded;

[0010] And / or, the sound-generating unit further includes a waterproof sealing ring, which is arranged around the folded ring, and the waterproof sealing ring, the folded ring, the reinforcing part and the shell are integrally injection molded.

[0011] In one embodiment, the vibration system further includes a support frame, and the reinforcing portion and the flat voice coil are both connected to the support frame;

[0012] And / or, the reinforcing portion has a support portion that bends and extends along the first direction, the support portion being connected to the flat voice coil.

[0013] In one embodiment, the reinforcing part is provided with a plurality of micropores, and the sound-generating unit further includes a waterproof and breathable membrane covering the micropores;

[0014] And / or, at least a portion of the reinforcing part is made of breathable material, and the sound-generating monomer further includes a waterproof and breathable membrane covering the breathable material;

[0015] And / or, the reinforcing part is provided with reinforcing ribs, which are located in the central region of the reinforcing part and extend along the long side of the shell.

[0016] In one embodiment, the sound-generating unit further includes a front cover, which is disposed on the side of the diaphragm away from the magnetic circuit system. The front cover has mesh openings, and the sound-generating unit further includes a dustproof net that covers the mesh openings.

[0017] In one embodiment, the sound-generating unit further includes a waterproof sealing ring, which is connected to the side of the housing away from the magnetic circuit system. The waterproof sealing ring is arranged around the folded ring and forms an annular step at the connection with the folded ring. The front cover is disposed on the annular step and located inside the waterproof sealing ring.

[0018] And / or, the mesh is of an irregular shape;

[0019] And / or, the mesh includes a first hole and a second hole, wherein the first hole and the second hole have different hole areas;

[0020] The first hole and the second hole are arranged alternately along the long or short side of the sound-emitting unit, or the first hole is scattered among the second holes, or the front cover includes a first region corresponding to the first hole and a second region corresponding to the second hole.

[0021] In one embodiment, the housing includes an annular body and a sidewall connected to the annular body, the sidewall being connected to the magnetic yoke to form a receiving cavity for accommodating the magnetic circuit system;

[0022] The sidewall has a first through hole, and the magnet assembly has a first protrusion extending into the first through hole.

[0023] In one embodiment, the sound-generating unit further includes a centering support plate, which includes a first fixing part, a spring arm part, and a second fixing part. The first fixing part is disposed in the housing, and the second fixing part is connected to the flat voice coil. The two ends of the spring arm part are respectively connected to the first fixing part and the second fixing part. The magnet assembly has a clearance space to avoid the centering support plate.

[0024] In one embodiment, the centering support includes two, which are respectively disposed at both ends of the long side of the housing. The two centering supports are connected by a conductive connection part, and the conductive connection part is also provided with an external solder pad that can be electrically connected to an external circuit.

[0025] In one embodiment, the conductive connection portion and the centering support piece are integrally formed components;

[0026] And / or, the conductive connection portion includes a main body portion connecting the two centering support plates and an external connection portion connected to one end of the main body portion, the external connection portion being provided with the external solder pad, the main body portion being located on the side of the magnetic circuit system, and the outer surface of the main body portion not extending beyond the outer surface of the housing;

[0027] And / or, the conductive connection part includes a main body part connecting the two centering support plates and an external connection part connected to one end of the main body part. The external connection part is provided with the external solder pad. The main body part is located on the side of the magnetic circuit system. The sound generating unit also includes a pressure plate. The pressure plate is connected to the housing. The main body part is located between the third magnet and the pressure plate. The outer surface of the pressure plate does not extend beyond the outer surface of the housing.

[0028] In one embodiment, the housing includes an annular body and a sidewall connected to the annular body, the magnetic yoke includes a base plate and a surrounding plate, the magnet assembly is disposed on the base plate, the surrounding plate is connected to the sidewall, and the first fixing part is clamped between the surrounding plate and the sidewall;

[0029] And / or, the first fixing part is provided with an injection hole, and the housing is provided with an injection groove communicating with the injection hole, the injection hole and the injection groove being used to hold glue;

[0030] And / or, the first fixing part is provided with a first solder pad, and the housing is provided with a second solder pad that is soldered to the first solder pad.

[0031] In one embodiment, the flat voice coil includes a first long axis segment and a second long axis segment arranged sequentially at intervals along the first direction. The first long axis segment is connected to the diaphragm. Both the first long axis segment and the second long axis segment extend along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0032] The thickness of the first magnet along the first direction is not less than 80% of the height of the first long axis segment along the first direction.

[0033] And / or, the thickness of the second magnet along the first direction is not less than 80% of the height of the second long axis segment along the first direction;

[0034] And / or, the thickness of the second magnet along the first direction is greater than the thickness of the first magnet and the third magnet along the first direction;

[0035] And / or, the thickness of the fourth magnet along the first direction is greater than the thickness of the first magnet and the third magnet along the first direction.

[0036] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil is not greater than 20:1;

[0037] And / or, the aspect ratio of the sound-emitting unit is not greater than 10:1.

[0038] In one embodiment, the magnetic yoke includes a base plate, a surrounding plate disposed around the periphery of the base plate, and a first mounting ear and a second mounting ear disposed at both ends of the surrounding plate along a third direction. The first mounting ear is provided with a first mounting hole and a first positioning hole at intervals along the third direction. The second mounting ear is provided with a second mounting hole and a second positioning hole at intervals along the third direction. The second positioning hole extends through the outer edge of the second mounting ear along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0039] The present invention also proposes an electronic device, the electronic device comprising a housing and the aforementioned sound-emitting unit, the sound-emitting unit being disposed within the housing.

[0040] The technical solution of this invention involves setting two magnet assemblies spaced apart. Each magnet assembly consists of a first magnet, a second magnet, a third magnet, and a fourth magnet stacked along a first direction. The first and third magnets are both magnetized along a second direction, but in opposite directions. The first direction is perpendicular to the second direction. The second and fourth magnets are both magnetized along the first direction. The polarity of the second magnet's pole facing the first magnet is the same as the polarity of the first magnet's pole near the magnetic gap. The polarity of the fourth magnet's pole facing the third magnet is the same as the polarity of the third magnet's pole near the magnetic gap. This allows each magnet assembly to form a magnetic field enhancement side facing the magnetic gap. Furthermore, the polarities of the two first magnets' poles near the magnetic gap are opposite, causing the magnetic lines of force of the two magnet assemblies to form a ring, thereby increasing the magnetic field driving force and improving the acoustic performance of the speaker. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating unit provided by the present invention;

[0043] Figure 2 An exploded structural diagram of an embodiment of the sound-generating monomer provided by the present invention;

[0044] Figure 3 A cross-sectional structural schematic diagram of an embodiment of the sound-generating unit provided by the present invention;

[0045] Figure 4 A partial cross-sectional view of an embodiment of the sound-generating unit provided by the present invention;

[0046] Figure 5 A schematic diagram of the magnetic field line distribution of an embodiment of the sound-generating unit provided by the present invention;

[0047] Figure 6 This is a schematic diagram of a structure of an embodiment of the diaphragm and housing provided by the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of an embodiment of the diaphragm provided by the present invention;

[0049] Figure 8 This is a schematic diagram of the structure of an embodiment of the magnetic yoke provided by the present invention;

[0050] Figure 9An exploded structural diagram of an embodiment of the centering support and housing provided by the present invention;

[0051] Figure 10 A schematic diagram of an embodiment of the front cover having a first hole and a second hole provided by the present invention;

[0052] Figure 11 A schematic diagram of the structure of an embodiment of the front cover provided by the present invention;

[0053] Figure 12 A schematic diagram of another embodiment of the front cover having a first hole and a second hole provided by the present invention;

[0054] Figure 13 A schematic diagram of another embodiment of the front cover provided by the present invention;

[0055] Figure 14 A schematic diagram of another embodiment of the front cover provided by the present invention;

[0056] Figure 15 A schematic diagram of another embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0057] Figure 16 This is a schematic diagram of an embodiment of the present invention in which the sound-generating unit is disposed within the outer casing.

[0058] Explanation of icon numbers:

[0059] 100. Sound-generating unit; 1. Housing; 11. Annular body; 12. Side wall; 121. First through hole; 14. Center part; 15. End; 16. Injection groove; 17. Second solder pad; 2. Magnetic circuit system; 21. Magnetic yoke; 212. Base plate; 213. Enclosure plate; 214. First mounting ear; 2141. First mounting hole; 2142. First positioning hole; 215. Second mounting ear; 2151. Second mounting hole; 2152. Second positioning hole; 22. Magnet assembly; 221. First magnet; 222. Second magnet; 223. Third magnet; 224. Magnetic gap; 225. First protrusion; 226. Fourth magnet 3. Iron; 31. Vibration system; 31. Diaphragm; 311. Surround; 312. Reinforcing part; 313. Reinforcing rib; 314. Micropore; 315. Support part; 32. Flat voice coil; 321. First long shaft section; 322. Second long shaft section; 33. Vibration gap; 4. Waterproof sealing ring; 41. Annular step; 5. Centering support plate; 51. First fixing part; 52. Second fixing part; 53. Spring arm part; 54. Glue injection hole; 55. First solder pad; 6. Conductive connection part; 61. Main body part; 62. External connection part; 621. External solder pad; 7. Front cover; 71. Mesh; 711. First hole; 712. Second hole; 8. Dustproof mesh;

[0060] 200. Outer shell.

[0061] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

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

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

[0064] Furthermore, if the embodiments of this invention 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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. When 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 invention.

[0065] As smart wearable products become thinner, the space left for speakers is gradually decreasing while the installation space for other components remains the same. This makes it difficult to improve the acoustic performance of speakers by increasing their size. The limited internal space restricts the acoustic performance of existing speakers, making it difficult to improve their acoustic performance and thus failing to meet users' needs.

[0066] Therefore, it is necessary to propose a sound-generating unit and electronic device aimed at solving how to improve the acoustic performance of loudspeakers.

[0067] Please see Figure 1 , Figure 3 and Figure 5As shown, in one embodiment of the present invention, the aspect ratio of the sound-generating unit 100 is greater than 2:1. The sound-generating unit 100 includes a magnetic circuit system 2, a vibration system 3, and a housing 1. The magnetic circuit system 2 includes a magnetic yoke 21 and two magnet assemblies 22 spaced apart from each other on the magnetic yoke 21. A magnetic gap 224 is formed between the two magnet assemblies 22. Each magnet assembly 22 includes a first magnet 221, a second magnet 222, a third magnet 223, and a fourth magnet 226 arranged sequentially along a first direction. The fourth magnet 226 is disposed on the magnetic yoke 21. The first magnet 221 and the third magnet 223 are both magnetized along a second direction but in opposite directions. The first direction is perpendicular to the second direction. The second magnet 222 and the fourth magnet 226 are both magnetized along the first direction. The second magnet 222 faces the first magnet. The polarity of the magnetic pole of 221 is the same as the polarity of the magnetic pole of the first magnet 221 near the magnetic gap 224. The polarity of the magnetic pole of the fourth magnet 226 facing the third magnet 223 is the same as the polarity of the magnetic pole of the third magnet 223 near the magnetic gap 224, so that each magnet assembly 22 can form a magnetic field enhancement side facing the magnetic gap 224. The vibration system 3 includes a diaphragm 31 and a flat voice coil 32 for driving the diaphragm 31 to vibrate in a first direction. The flat voice coil 32 is connected to the diaphragm 31 and located in the magnetic gap 224. The axial direction of the flat voice coil 32 is arranged in a second direction. The diaphragm 31 is connected to the housing 1. The housing 1 has a central portion 14 and end portions 15 located at both ends of the central portion 14 along the long side direction of the housing 1. The central portion 14 protrudes away from the flat voice coil 32.

[0068] The sound-generating unit 100 of the present invention can be a loudspeaker unit, and can be applied in the sound-generating module of an electronic device, such as a computer, mobile phone, or smart wearable device. This embodiment uses a loudspeaker unit as an example for illustration.

[0069] The technical solution of this invention involves setting two magnet assemblies spaced apart. Each magnet assembly consists of a first magnet 221, a second magnet 222, a third magnet 223, and a fourth magnet 226 stacked along a first direction. The first magnet 221 and the third magnet 223 are both magnetized along a second direction, but in opposite directions. The first direction is perpendicular to the second direction. The second magnet 222 and the fourth magnet 226 are both magnetized along the first direction. The polarity of the second magnet 222 facing the first magnet 221 is the same as the polarity of the first magnet 221 near the magnetic gap 224. The polarity of the fourth magnet 226 facing the third magnet 223 is the same as the polarity of the third magnet 223 near the magnetic gap 224. This allows each magnet assembly 22 to form a magnetic field enhancement side facing the magnetic gap 224. Furthermore, the polarities of the two first magnets 221 near the magnetic gap 224 are opposite, causing the magnetic lines of force of the two magnet assemblies 22 to form a ring, thereby increasing the magnetic field driving force and improving the acoustic performance of the speaker.

[0070] The first direction is Figure 1 The vertical direction is shown, and the second direction is... Figure 1 As shown in the left-right direction, taking the first magnet 221 magnetizing to the left as an example, the second magnet 222 located to the left of the magnetic gap 224 is magnetized downwards, and the second magnet 222 located to the right of the magnetic gap 224 is magnetized upwards. The third magnet 223 is magnetized to the right, and the fourth magnet 226 located to the left of the magnetic gap 224 is magnetized upwards, and the fourth magnet 226 located to the right of the magnetic gap 224 is magnetized downwards. This makes each magnet assembly 22 face the magnetic gap 224 to form a magnetic field enhancement side. Furthermore, the polarities of the magnetic poles of the two first magnets 221 near the magnetic gap 224 are opposite, and the polarities of the magnetic poles of the two third magnets 223 near the magnetic gap 224 are also opposite. This allows the two magnet assemblies 22 to form a complete closed loop of magnetic field lines, thereby increasing the magnetic field strength and improving the acoustic performance of the speaker. Moreover, by setting the magnetic yoke 21 to correct the magnetic field lines of the fourth magnet 226, more magnetic field lines can pass through the flat voice coil 32, thereby enhancing the induction intensity of the flat voice coil 32 and further improving the acoustic performance of the speaker.

[0071] In this embodiment, the sound-emitting unit 100 has a narrow and elongated shape. It should be noted that the sound-emitting unit 100 has a height (thickness) along the first direction, and a length and width along a direction perpendicular to the first direction. The length-to-width ratio of the sound-emitting unit 100 is greater than 2:1, which better fits the reserved space of the microelectronic device. Furthermore, the outer surface of the central portion 14 near the diaphragm 31 protrudes towards the side away from the flat voice coil 32. This protrusion of the central portion 14 away from the flat voice coil 32 is to better adapt to the shape of the electronic device's housing 200, allowing the housing 1 to extend along the housing 200 and achieve a sealed contact between the housing 1 and the housing 200. The protrusion of the central portion 14 away from the flat voice coil 32 also makes the housing 1 curved or approximately curved to fit the shape of the housing 200, thereby improving the utilization rate of the internal space of the housing 200. In this embodiment, the shape of the diaphragm 31 is similar to that of the housing 1. By adapting the shape of the housing 1 to the shape of the outer shell 200, a portion of the gap is used as the vibration space for the diaphragm 31. This increases the vibration space of the diaphragm 31 without increasing the installation space of the sound-generating unit 100, and also increases the volume of the front acoustic cavity of the sound-generating unit 100, thereby effectively improving the acoustic performance of the sound-generating unit 100. It should be noted that the outer surface of the housing 1 can be an overall arc-shaped structure, or the central part 14 can be a flat part and the end part 15 can be a flat part or a curved part, or the central part 14 can be a curved part and the end part 15 can be a flat part or a curved part.

[0072] It should be noted that the aspect ratio of the sound-emitting unit 100 refers to the ratio of its length in a third direction to its width in a second direction, wherein the first, second, and third directions are perpendicular to each other. The third direction is... Figure 1 The front and back directions are shown.

[0073] It should also be noted that when the flat voice coil 32 is energized, it reciprocates within the magnetic gap 224, cutting magnetic lines of force, which drives the diaphragm 31 to vibrate up and down, thereby inducing air to produce sound and completing the energy conversion between electroacoustics. The flat voice coil 32 can be directly connected to the diaphragm 31, or it can be connected to the diaphragm 31 through other structural components such as a connecting frame.

[0074] According to one embodiment of the present invention, the first magnet 221 can be a bar magnet or multiple segmented magnets; the second magnet 222 can be a bar magnet or multiple segmented magnets; the third magnet 223 can be a bar magnet or multiple segmented magnets; and the fourth magnet 226 can be a bar magnet or multiple segmented magnets.

[0075] In this embodiment, the first magnet 221, the second magnet 222, the third magnet 223, and the fourth magnet 226 are connected sequentially, making the entire magnetic circuit system 2 more compact and reducing the space occupied by the magnetic circuit system 2. Furthermore, by placing the fourth magnet 226 on the magnetic yoke 21, the magnet assembly 22 is connected to the magnetic yoke 21. Furthermore, the first magnet 221 can be connected to the housing 1, thus fixing the magnet assembly 22 and the housing 1 together.

[0076] Please see Figure 3 and Figure 4 As shown, in one embodiment, the diaphragm 31 includes a folded ring 311 and a reinforcing portion 312 disposed in the central region of the folded ring 311. The folded ring 311 is connected to the housing 1. The folded ring 311, the reinforcing portion 312 and the housing 1 are integrally injection molded. By integrally injection molding the folded ring 311, the reinforcing portion 312 and the housing 1, the number of sealing surfaces is effectively reduced, and the waterproof performance of the sound-generating unit 100 is improved.

[0077] In one embodiment, the sound-generating unit 100 further includes a waterproof sealing ring 4, which surrounds the folded ring 311. The waterproof sealing ring 4, the folded ring 311, the reinforcing part 312, and the housing 1 are integrally injection molded. By integrally injection molding the waterproof sealing ring 4, the folded ring 311, the reinforcing part 312, and the housing 1, the number of sealing surfaces is effectively reduced, thereby improving the waterproof performance of the sound-generating unit 100. It should be noted that the height of the diaphragm 31 is lower than that of the waterproof sealing ring 4, resulting in a vibration gap 33 between the diaphragm 31 and the waterproof sealing ring 4. When the waterproof sealing ring 4 is in sealing contact with the housing 200, this vibration gap 33 provides a larger vibration space for the diaphragm 31, reducing the probability of interference between the diaphragm 31 and the housing 200.

[0078] In one embodiment, the vibration system 3 further includes a support, and the reinforcement 312 and the flat voice coil 32 are both connected to the support; the driving force of the flat voice coil 32 is transmitted by setting the support, thereby driving the diaphragm 31 to vibrate.

[0079] Please see Figure 3 As shown, in one embodiment, the reinforcing portion 312 has a support portion 315 that extends and bends along a first direction, and the support portion 315 is connected to the flat voice coil 32. By providing the support portion 315 to connect the flat voice coil 32, the original bracket connection is replaced, eliminating the bracket structural component, reducing the bracket installation process, and lowering the production cost of the sound-generating unit 100. It should be noted that the reinforcing portion 312 can be a polymer material, such as polyphthalamide, polyphthalamide with 35% glass fiber, or carbon fiber, metal alloy, etc.

[0080] Please see Figure 6 As shown, in one embodiment, the reinforcing part 312 is provided with a plurality of micropores 314, and the sound-generating unit 100 also includes a waterproof and breathable membrane covering the micropores 314. By providing a plurality of micropores 314 on the reinforcing part 312, it is beneficial to balance the air pressure inside and outside the sound-generating unit 100. By providing a waterproof and breathable membrane covering the micropores 314, the waterproof performance of the sound-generating unit 100 is effectively improved while ensuring the balance of air pressure inside and outside the sound-generating unit 100.

[0081] In one embodiment, at least a portion of the reinforcing part 312 is made of a breathable material, and the sound-generating unit 100 also includes a waterproof and breathable membrane covering the breathable material. By making at least a portion of the reinforcing part 312 a breathable material, it facilitates the balance of air pressure inside and outside the sound-generating unit 100. By providing a waterproof and breathable membrane covering the breathable material, the waterproof performance of the sound-generating unit 100 is effectively improved while ensuring the balance of air pressure inside and outside the sound-generating unit 100. It should be noted that the breathable material can be an organic aerogel, or a foamed metal, etc.

[0082] Please see Figure 7 As shown, in one embodiment, the reinforcing portion 312 is provided with a reinforcing rib 313, which is located in the central region of the reinforcing portion 312 and extends along the long side of the housing 1. By providing the reinforcing rib 313, the structure of the reinforcing portion 312 is strengthened, thereby effectively shifting the resonance of the reinforcing portion 312 to a higher frequency.

[0083] Please see Figure 1 and Figure 2 As shown, in one embodiment, the sound-generating unit 100 further includes a front cover 7, which is located on the side of the diaphragm 31 away from the magnetic circuit system 2. The front cover 7 has mesh openings 71. The sound-generating unit 100 also includes a dustproof net 8, which covers the mesh openings 71. By providing mesh openings 71 on the front cover 7, the probability of sharp objects puncturing the diaphragm 31 and causing the sound-generating unit 100 to fail can be effectively reduced. The dustproof net 8 covers the mesh openings 71 to prevent external dust from falling onto the diaphragm 31 through the mesh openings 71 and affecting the acoustic performance of the sound-generating unit 100. It should be noted that there are multiple mesh openings 71, and the shapes and sizes of the multiple mesh openings 71 are not exactly the same, and the distribution of the multiple mesh openings 71 can be adjusted as needed.

[0084] Please see Figure 3 and Figure 4 As shown, in one embodiment, the sound-generating unit 100 further includes a waterproof sealing ring 4. The waterproof sealing ring 4 is connected to the side of the housing 1 away from the magnetic circuit system 2. The waterproof sealing ring 4 is arranged around the folding ring 311 and forms an annular step 41 at the connection with the folding ring 311. The front cover 7 is disposed on the annular step 41 and located inside the waterproof sealing ring 4. By forming the annular step 41, the front cover 7 is reliably supported. By placing the front cover 7 at the annular step 41, the size of the entire sound-generating unit 100 will not increase due to the protrusion of the waterproof sealing ring 4. By placing the front cover 7 on the annular step 41 and located inside the waterproof sealing ring 4, the size of the sound-generating unit 100 is effectively reduced, so that the sound-generating unit 100 can better adapt to the needs of a confined installation environment.

[0085] Please see Figures 10 to 15 As shown, in one embodiment, the mesh 71 is irregular in shape; the amplitude symmetry of the sound-generating unit 100 can be adjusted by adjusting the shape of the mesh 71.

[0086] In one embodiment, the mesh 71 includes a first hole 711 and a second hole 712, with different hole areas. The first hole 711 and the second hole 712 are arranged alternately along the long or short side of the sound-generating unit 100, or the first hole 711 is scattered among the second holes 712, or the front cover 7 includes a first region corresponding to the first hole 711 and a second region corresponding to the second hole 712. By changing the arrangement of the first hole 711 and the second hole 712, the amplitude symmetry of the sound-generating unit 100 can also be effectively adjusted.

[0087] Please see Figure 1 and Figure 3 As shown, in one embodiment, the housing 1 includes an annular body 11 and a sidewall 12 connected to the annular body 11. The sidewall 12 is connected to the magnetic yoke 21 to form a receiving cavity for accommodating the magnetic circuit system 2. The sidewall 12 has a first through hole 121, and the magnet assembly 22 has a first protrusion 225 extending into the first through hole 121. By opening the first through hole 121 in the sidewall 12, the magnet assembly 22 can extend outward to form the first protrusion 225, thereby increasing the volume of the magnet assembly 22, improving the magnetic field strength, and thus improving the acoustic performance of the sound-generating unit 100. It should be noted that the first through hole 121 penetrates the two sidewalls 12 that are arranged opposite each other along the second direction, and the two outer walls of the magnet assembly 22 that are arranged opposite each other along the second direction both extend outward to form the first protrusion 225. The two first protrusions 225 are respectively located in the two first through holes 121.

[0088] According to one embodiment of the present invention, a second protrusion is formed on the side of the first magnet 221 near the magnetic gap 224, protruding in a direction away from the magnetic yoke 21 along a first direction. The housing 1 has a second through hole for avoiding the second protrusion, and the second through hole communicates with the magnetic gap 224. By providing the second protrusion, the size of the first magnet 221 is increased, further expanding the magnetic field region of the flat voice coil 32, so that the driving force factor of the flat voice coil 32 can be symmetrical with respect to the static equilibrium position.

[0089] Please see Figure 2 As shown, in one embodiment, the sound-generating unit 100 further includes a centering support 5. The centering support 5 includes a first fixing part 51, a spring arm part 53, and a second fixing part 52. The first fixing part 51 is disposed on the housing 1, and the second fixing part 52 is connected to the flat voice coil 32. The two ends of the spring arm part 53 are respectively connected to the first fixing part 51 and the second fixing part 52. The magnet assemblies 22 all have clearance space to avoid the centering support 5. By providing the centering support 5, the probability of polarization of the flat voice coil 32 is reduced, and the vibration stability of the flat voice coil 32 is improved. In this embodiment, the installation space of the centering support 5 is formed between the magnet assemblies 22.

[0090] In one embodiment, the centering support 5 includes two pieces, each disposed at one end of the long side of the housing 1. The two centering support pieces 5 are connected by a conductive connection portion 6, which is also provided with an external solder pad 621 for electrical connection with an external circuit. By arranging the conductive connection portion 6 along the long side of the housing 1, the two centering support pieces 5 can be electrically conductive, thereby facilitating the introduction of external circuit current into the flat voice coil 32. It should be noted that the long side direction is... Figure 1 The front and back directions are shown.

[0091] In one embodiment, the conductive connection portion 6 and the centering support plate 5 are integrally formed. This integral forming reduces the number of parts requiring assembly, eliminates assembly steps, improves the assembly efficiency of the sound-generating unit 100, and avoids assembly errors. In one embodiment, the conductive connection portion 6 includes a main body portion 61 connecting the two centering support plates 5 and an external connection portion 62 connected to one end of the main body portion 61. The external connection portion 62 is provided with an external solder pad 621. The main body portion 61 is located on the side of the magnetic circuit system 2, and its outer surface does not extend beyond the outer surface of the housing 1. This avoids the phenomenon of the main body portion 61 protruding, which would increase the overall size of the sound-generating unit 100, and also avoids the risk of interference between the main body portion 61 and other components of the electronic device.

[0092] In one embodiment, the conductive connection portion 6 includes a main body portion 61 connecting two centering support plates 5 and an external connection portion 62 connected to one end of the main body portion 61. The external connection portion 62 is provided with an external solder pad 621. The main body portion 61 is located on the side of the magnetic circuit system 2. The sound-generating unit 100 also includes a pressure plate, which is connected to the housing 1. The main body portion 61 is located between the third magnet 223 and the pressure plate, and the outer surface of the pressure plate does not extend beyond the outer surface of the housing 1. The pressure plate is provided to prevent the main body portion 61 from warping and interfering with other parts. The fact that the outer surface of the pressure plate does not extend beyond the outer surface of the housing 1 is to avoid the phenomenon that the overall size of the sound-generating unit 100 would increase due to the pressure plate protruding from the outer surface of the housing 1, and to avoid the pressure plate protruding from the outer surface of the housing 1 and interfering with other parts. It should be noted that the pressure plate is provided with riveting holes, which can be fixedly connected to the hot-melt riveting posts provided on the housing 1.

[0093] In one embodiment, the housing 1 includes an annular body 11 and a sidewall 12 connected to the annular body 11. The magnetic yoke 21 includes a base plate 212 and a surrounding plate 213. The magnet assembly 22 is disposed on the base plate 212. The surrounding plate 213 is connected to the sidewall 12. A first fixing part 51 is sandwiched between the surrounding plate 213 and the sidewall 12. The first fixing part 51 is sandwiched between the surrounding plate 213 and the sidewall 12, thereby effectively fixing the first fixing part 51 and improving the vibration stability of the flat voice coil 32.

[0094] Please see Figure 9 As shown, in one embodiment, the first fixing part 51 is provided with an injection hole 54, and the housing 1 is provided with an injection groove 16 communicating with the injection hole 54. The injection hole 54 and the injection groove 16 are used to contain glue. Glue is injected into the injection groove 16 through the injection hole 54, thereby connecting the first fixing part 51 to the housing 1 through the solidified glue, thereby improving the reliability of the connection between the first fixing part 51 and the housing 1.

[0095] In one embodiment, the first fixing part 51 is provided with a first solder pad 55, and the housing 1 is provided with a second solder pad 17 corresponding to the first solder pad 55 and soldered to the first solder pad 55. By soldering the first solder pad 55 to the second solder pad 17, the reliability of the connection between the first fixing part 51 and the housing 1 is improved.

[0096] Please see Figure 3 and Figure 5 As shown, in one embodiment, the flat voice coil 32 includes a first long axis segment 321 and a second long axis segment 322 arranged sequentially at intervals along a first direction. The first long axis segment 321 is connected to the diaphragm 31. Both the first long axis segment 321 and the second long axis segment 322 extend along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The thickness of the first magnet 221 along the first direction is not less than 80% of the height of the first long axis segment 321 along the first direction. This arrangement increases the number of magnetic lines of force passing through the first long axis segment 321, improves the driving force of the flat voice coil 32, and enhances the acoustic performance of the sound-generating unit 100.

[0097] In one embodiment, the thickness of the second magnet 222 along the first direction is not less than 80% of the height of the second long axis segment 322 along the first direction; this arrangement increases the number of magnetic lines of force passing through the second long axis segment 322, improves the driving force of the flat voice coil 32, and enhances the acoustic performance of the sound-generating unit 100.

[0098] In one embodiment, the thickness of the second magnet 222 along the first direction is greater than the thickness of the first magnet 221 and the third magnet 223 along the first direction; this arrangement increases the number of magnetic lines of force passing through the first long axis segment 321 and the second long axis segment 322, improves the driving force of the flat voice coil 32, and enhances the acoustic performance of the sound-generating unit 100.

[0099] In one embodiment, the thickness of the fourth magnet 226 along the first direction is greater than the thickness of the first magnet 221 and the third magnet 223 along the first direction. This arrangement increases the number of magnetic field lines passing through the magnetic yoke 21, thereby increasing the number of magnetic field lines passing through the flat voice coil 32, improving the driving force of the flat voice coil 32, and enhancing the acoustic performance of the sound-generating unit 100.

[0100] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil 32 is no greater than 20:1; controlling the aspect ratio of the inner diameter of the flat voice coil 32 to less than or equal to 20:1 is to facilitate the winding of the flat voice coil 32. It should be noted that the aspect ratio of the inner diameter of the flat voice coil 32 refers to the ratio of the length dimension of the inner circle of the flat voice coil 32 along a third direction to the width dimension of the inner circle of the flat voice coil 32 along a first direction.

[0101] In one embodiment, the aspect ratio of the sound-generating unit 100 is no greater than 10:1, thereby better adapting to the installation needs of some existing narrow installation environments.

[0102] Please see Figure 8 As shown, in one embodiment, the magnetic yoke 21 includes a base plate 212, a surrounding plate 213 disposed around the periphery of the base plate 212, and a first mounting ear 214 and a second mounting ear 215 disposed at both ends of the surrounding plate 213 along a third direction. The first mounting ear 214 is provided with a first mounting hole 2141 and a first positioning hole 2142 spaced apart along a third direction. The second mounting ear 215 is provided with a second mounting hole 2151 and a second positioning hole 2152 spaced apart along a third direction. The second positioning hole 2152 extends through the outer edge of the second mounting ear 215 along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The first mounting hole 2141 and the second mounting hole 2151 are provided to facilitate the installation of the sound-generating unit 100. The first positioning hole 2142 and the second positioning hole 2152 are provided to facilitate the precise positioning of the sound-generating unit 100 and prevent the sound-generating unit 100 from being misaligned during assembly into the housing 200.

[0103] Please see Figure 16 The present invention also proposes an electronic device, which includes a housing 200 and the aforementioned sound-emitting unit 100, wherein the sound-emitting unit 100 is disposed within the housing 200. The electronic device may be a computer, mobile phone, smart wearable device, etc. Since the electronic device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0104] The above are merely exemplary embodiments of the present invention and do not limit the scope of the patent of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A sound-emitting monomer, characterized in that, The aspect ratio of the sound-emitting unit is greater than 2:1, and the sound-emitting unit includes: A magnetic circuit system includes a magnetic yoke and two magnet assemblies spaced apart from each other on the magnetic yoke, with a magnetic gap formed between the two magnet assemblies. Each magnet assembly includes a first magnet, a second magnet, a third magnet, and a fourth magnet arranged sequentially along a first direction, with the fourth magnet disposed on the magnetic yoke. The first magnet and the third magnet are both magnetized along a second direction but in opposite directions. The first direction is perpendicular to the second direction. The second magnet and the fourth magnet are both magnetized along the first direction. The polarity of the second magnet's pole facing the first magnet is the same as the polarity of the first magnet's pole near the magnetic gap. The polarity of the fourth magnet's pole facing the third magnet is the same as the polarity of the third magnet's pole near the magnetic gap, so that each magnet assembly can form a magnetic field enhancement side facing the magnetic gap. Furthermore, the polarities of the two first magnets' poles near the magnetic gap are opposite. A vibration system, the vibration system including a diaphragm and a flat voice coil for driving the diaphragm to vibrate along a first direction, the flat voice coil being connected to the diaphragm and located within the magnetic gap, the axial direction of the flat voice coil being arranged along a second direction; A housing, the diaphragm being connected to the housing, the housing having a central portion and ends located at both ends of the central portion along the long side of the housing, the central portion protruding away from the flat voice coil; The housing includes an annular body and a sidewall connected to the annular body. The sidewall is connected to the magnetic yoke to form a receiving cavity for accommodating the magnetic circuit system. The sidewall is provided with a first through hole, which penetrates the two sidewalls that are arranged opposite each other along the second direction. The two outer walls of the magnet assembly that are arranged opposite each other along the second direction extend outward to form a first protrusion. The two first protrusions are respectively located in the two first through holes.

2. The sound-generating unit as described in claim 1, characterized in that, The diaphragm includes a folded ring and a reinforcing portion disposed in the central region of the folded ring, and the folded ring is connected to the housing; The folding ring, the reinforcing part, and the shell are integrally injection molded; or, the sound-generating unit further includes a waterproof sealing ring, which is arranged around the folding ring, and the waterproof sealing ring, the folding ring, the reinforcing part, and the shell are integrally injection molded.

3. The sound-generating unit as described in claim 2, characterized in that, The vibration system also includes a support frame, and the reinforcing part and the flat voice coil are both connected to the support frame; Alternatively, the reinforcing portion may have a support portion that bends and extends along the first direction, the support portion being connected to the flat voice coil.

4. The sound-generating unit as described in claim 2, characterized in that, The reinforcing part is provided with multiple micropores, and the sound-generating unit also includes a waterproof and breathable membrane covering the micropores; Alternatively, at least a portion of the reinforcing part may be made of breathable material, and the sound-generating monomer may further include a waterproof and breathable membrane covering the breathable material.

5. The sound-generating unit as described in claim 2, characterized in that, The reinforcing part is provided with reinforcing ribs, which are located in the central region of the reinforcing part and extend along the long side of the shell.

6. The sound-generating unit as described in claim 2, characterized in that, The sound-generating unit also includes a front cover, which is located on the side of the diaphragm away from the magnetic circuit system. The front cover has mesh openings. The sound-generating unit also includes a dustproof net, which covers the mesh openings.

7. The sound-generating unit as described in claim 6, characterized in that, The waterproof sealing ring is connected to the side of the housing away from the magnetic circuit system. The connection between the waterproof sealing ring and the folding ring forms an annular step. The front cover is disposed on the annular step and located inside the waterproof sealing ring. And / or, the mesh is irregularly shaped.

8. The sound-generating unit as described in claim 6, characterized in that, The mesh includes a first hole and a second hole, and the first hole and the second hole have different hole areas; The first hole and the second hole are arranged alternately along the long or short side of the sound-emitting unit, or the first hole is scattered among the second holes, or the front cover includes a first region corresponding to the first hole and a second region corresponding to the second hole.

9. The sound-generating unit as described in any one of claims 1 to 8, characterized in that, The sound-generating unit also includes a centering support plate, which includes a first fixing part, a spring arm part, and a second fixing part. The first fixing part is disposed in the housing, the second fixing part is connected to the flat voice coil, and the two ends of the spring arm part are respectively connected to the first fixing part and the second fixing part.

10. The sound-generating unit as described in claim 9, characterized in that, The centering support includes two pieces, which are respectively located at both ends of the long side of the housing. The two centering support pieces are connected by a conductive connection part, which is also provided with an external solder pad that can be electrically connected to an external circuit.

11. The sound-generating unit as described in claim 10, characterized in that, The conductive connection part and the centering support piece are integrally molded parts; And / or, the conductive connection portion includes a main body portion connecting the two centering supports and an external connection portion connected to one end of the main body portion, the external connection portion being provided with the external solder pad, the main body portion being located on the side of the magnetic circuit system, and the outer surface of the main body portion not extending beyond the outer surface of the housing.

12. The sound-generating unit as described in claim 10, characterized in that, The conductive connection part includes a main body connecting the two centering supports and an external connection part connected to one end of the main body. The external connection part is provided with the external solder pad. The main body is located on the side of the magnetic circuit system. The sound-generating unit also includes a pressure plate. The pressure plate is connected to the housing. The main body is located between the third magnet and the pressure plate. The outer surface of the pressure plate does not extend beyond the outer surface of the housing.

13. The sound-generating unit as described in claim 9, characterized in that, The magnetic yoke includes a base plate and a surrounding plate, the magnet assembly is disposed on the base plate, the surrounding plate is connected to the side wall, and the first fixing part is clamped between the surrounding plate and the side wall; And / or, the first fixing part is provided with an injection hole, and the housing is provided with an injection groove communicating with the injection hole, the injection hole and the injection groove being used to hold glue; And / or, the first fixing part is provided with a first solder pad, and the housing is provided with a second solder pad that is soldered to the first solder pad.

14. The sound-generating unit as described in any one of claims 1 to 8, characterized in that, The flat voice coil includes a first long axis segment and a second long axis segment arranged sequentially at intervals along the first direction. The first long axis segment is connected to the diaphragm. Both the first long axis segment and the second long axis segment extend along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The thickness of the first magnet along the first direction is not less than 80% of the height of the first long axis segment along the first direction. And / or, the thickness of the second magnet along the first direction is not less than 80% of the height of the second long axis segment along the first direction; And / or, the thickness of the second magnet along the first direction is greater than the thickness of the first magnet along the first direction, and the thickness of the second magnet along the first direction is greater than the thickness of the third magnet along the first direction. And / or, the thickness of the fourth magnet along the first direction is greater than the thickness of the first magnet along the first direction, and the thickness of the fourth magnet along the first direction is greater than the thickness of the third magnet along the first direction.

15. The sound-generating unit as described in any one of claims 1 to 8, characterized in that, The aspect ratio of the inner diameter of the flat voice coil is no greater than 20:1; And / or, the aspect ratio of the sound-emitting unit is not greater than 10:

1.

16. The sound-generating unit as described in any one of claims 1 to 8, characterized in that, The magnetic yoke includes a base plate, a surrounding plate disposed around the periphery of the base plate, and a first mounting ear and a second mounting ear disposed at both ends of the surrounding plate along a third direction. The first mounting ear is provided with a first mounting hole and a first positioning hole at intervals along the third direction. The second mounting ear is provided with a second mounting hole and a second positioning hole at intervals along the third direction. The second positioning hole extends through the outer edge of the second mounting ear along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

17. An electronic device, characterized in that, The electronic device includes a housing and a sound-emitting unit as described in any one of claims 1 to 16, the sound-emitting unit being disposed within the housing.

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