Sound production monomer and electronic equipment

Abstract

The utility model discloses a sounding monomer and electronic equipment, relates to the sound energy conversion technology field, the sounding monomer comprises a housing, a magnetic circuit system, a vibration system and a waterproof sealing ring, the magnetic circuit system is connected with the housing, the magnetic circuit system comprises a magnet assembly, the magnet assembly forms a magnetic gap, and the vibration system is connected with the waterproof sealing ring. The magnet assembly comprises a plurality of magnets which are sequentially arranged in the first direction, and the magnet assembly is provided with a magnetic field enhancement side facing the magnetic gap; the vibration system comprises a vibrating diaphragm and a flat voice coil, the flat voice coil is connected with the vibrating diaphragm and located in the magnetic gap, the axial direction of the flat voice coil is arranged in the second direction, and the first direction is perpendicular to the second direction; the waterproof sealing ring is connected to the side, away from the magnetic circuit system, of the shell and surrounds the vibrating diaphragm, and the shell, the waterproof sealing ring and the vibrating diaphragm are integrally formed through injection molding. The magnet assembly is provided with a magnetic field enhancement side facing the magnetic gap, so that the magnetic field driving force is improved, and the acoustic performance of the loudspeaker is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound energy conversion, in particular to a sound-generating unit and an electronic device. Background Art

[0002] With the development of thinner smart wearable products, the space left for speakers is gradually decreasing while the installation space of other components remains unchanged. This makes it difficult to improve the acoustic performance of speakers by increasing their volume. The limited internal space restricts the acoustic performance of existing speakers, making it difficult to improve the acoustic performance of speakers, so that they cannot meet the user's usage needs. Utility Model Content

[0003] The main purpose of this utility model is to provide a sound-emitting unit and an electronic device,

[0004] To achieve the above-mentioned purpose, the utility model provides a sound-emitting monomer, wherein the aspect ratio of the sound-emitting monomer is greater than 2:1, and the sound-emitting monomer comprises:

[0005] case,

[0006] a magnetic circuit system connected to the housing, the magnetic circuit system comprising a support plate and two magnet assemblies spaced apart from each other, a magnetic gap formed between the two magnet assemblies, each magnet assembly comprising a plurality of magnets sequentially arranged along a first direction, each magnet assembly having a magnetic field enhancement side facing the magnetic gap;

[0007] a vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along the first direction, the flat voice coil being connected to the diaphragm and positioned within the magnetic gap, the axial direction of the flat voice coil being arranged along a second direction, the first direction being perpendicular to the second direction;

[0008] A waterproof sealing ring is connected to a side of the housing away from the magnetic circuit system. The waterproof sealing ring is arranged around the diaphragm. The housing, the waterproof sealing ring and the diaphragm are an integral injection-molded part.

[0009] In one embodiment, the diaphragm includes a folding ring and a reinforcement portion arranged in the central area of ​​the folding ring, the waterproof sealing ring is arranged around the folding ring, the flat voice coil is connected to the reinforcement portion, and the shell, the waterproof sealing ring, the folding ring and the reinforcement portion are an integral injection molded part.

[0010] In one embodiment, the sound unit further includes a front cover, which is arranged on a side of the diaphragm away from the magnetic circuit system, and has mesh holes. The sound unit further includes a dustproof net, which covers the mesh holes.

[0011] In one embodiment, a connection between the waterproof sealing ring and the folding ring forms an annular step, and the front cover is arranged on the annular step and is located on the inner side of the waterproof sealing ring.

[0012] In one embodiment, the vibration system further comprises a bracket, and the reinforcement portion and the flat voice coil are both connected to the bracket;

[0013] Alternatively, the reinforcing portion includes a supporting portion protruding along the first direction, and the supporting portion is connected to the flat voice coil.

[0014] In one embodiment, the reinforcement portion is provided with a plurality of micropores, and the sound-emitting unit further includes a waterproof and breathable membrane covering the micropores;

[0015] Alternatively, at least a portion of the reinforcing portion is made of a breathable material, and the sound-emitting unit further comprises a waterproof breathable membrane covering the breathable material;

[0016] And / or, the reinforcement portion is provided with a reinforcement rib, and the reinforcement rib is located in a central area of ​​the reinforcement portion and extends along the long side direction of the shell.

[0017] In one embodiment, the shell includes an annular body and a side wall connected to the annular body; the waterproof sealing ring is connected to the annular body, the side wall is provided with a first through hole, and the magnet assembly has a first protrusion extending into the first through hole.

[0018] In one embodiment, each of the magnet assemblies includes a first magnet, a second magnet, and a third magnet arranged in sequence along the first direction, the first magnet and the third magnet are magnetized along the second direction and in opposite directions; the second magnet is magnetized along the first direction, and 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, and the polarity of the magnetic poles of the two first magnets close to the magnetic gap is opposite.

[0019] In one embodiment, the flat voice coil includes a first long axis segment and a second long axis segment arranged in sequence along the first direction, the first long axis segment is connected to the diaphragm, and the first long axis segment and the second long axis segment both extend along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other;

[0020] The thickness of the first magnet along the first direction is not less than 80 percent of the height of the first long axis segment along the first direction;

[0021] And / or, the thickness of the third magnet along the first direction is not less than eighty percent of the height of the second long axis segment along the first direction;

[0022] And / or, the thickness of the first magnet and the third magnet along the first direction is greater than the thickness of the second magnet along the first direction.

[0023] In one embodiment, the support plate is made of a non-magnetic material;

[0024] The support plate is provided with an avoidance groove corresponding to the magnetic gap for avoiding the flat voice coil;

[0025] Alternatively, the support plate is provided with an avoidance hole corresponding to the magnetic gap for avoiding the flat voice coil, and the sound unit further includes a covering member covering the avoidance hole, and the covering member is arranged on a side of the support plate away from the magnet assembly.

[0026] In one embodiment, the magnet assembly further includes a fourth magnet, which is arranged on a side of the third magnet away from the second magnet along the first direction, and the fourth magnet is magnetized along the first direction, and 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.

[0027] In one embodiment, the flat voice coil includes a first long axis segment and a second long axis segment arranged in sequence along the first direction, the first long axis segment is connected to the diaphragm, and the first long axis segment and the second long axis segment both extend along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other;

[0028] The thickness of the first magnet along the first direction is not less than 80 percent of the height of the first long axis segment along the first direction;

[0029] And / or, the thickness of the second magnet along the first direction is not less than eighty percent of the height of the second long axis segment along the first direction;

[0030] 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;

[0031] 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.

[0032] In one embodiment, the support plate is made of a magnetic conductive material.

[0033] In one embodiment, the sound unit further includes a centering support plate, which includes a first fixing portion, an elastic arm portion, and a second fixing portion. The first fixing portion is arranged on the shell, the second fixing portion is connected to the flat voice coil, and the two ends of the elastic arm portion are respectively connected to the first fixing portion and the second fixing portion.

[0034] In one embodiment, the centering support plates include two, and the two centering support plates are respectively arranged at the two ends of the long side direction of the shell. The two centering support plates are connected by a conductive connecting part, and the conductive connecting part is also provided with an external solder pad that can be electrically connected to an external circuit.

[0035] In one embodiment, the conductive connection portion and the centering support piece are integrally formed.

[0036] And / or, the conductive connecting part includes a main body connecting the two centering support plates and an external connecting part connected to one end of the main body, the external connecting part is provided with the external welding pad, the main body is provided on the side of the magnetic circuit system, and the outer surface of the main body does not exceed the outer surface of the shell.

[0037] In one embodiment, the shell includes an annular body and a side wall connected to the annular body, the magnetic circuit system includes a support plate, the support plate includes a base plate and a surrounding plate, the magnet assembly is arranged on the base plate, the surrounding plate is connected to the side wall, and the first fixing portion is clamped between the surrounding plate and the side wall.

[0038] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil is not greater than 20:1;

[0039] And / or, the aspect ratio of the sound unit is not greater than 10:1;

[0040] And / or, the housing has a central portion and end portions located at both ends of the central portion along a longitudinal direction of the housing, and the central portion protrudes toward a side away from the flat voice coil.

[0041] The present invention further provides an electronic device, which includes a housing and the above-mentioned sound-emitting unit, wherein the sound-emitting unit is arranged in the housing.

[0042] The technical solution of the present invention adopts the method of arranging a plurality of magnets in sequence along a first direction and adjusting the magnetization direction of each magnet so that the magnet assembly has a magnetic field enhancement side facing the magnetic gap, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0044] Figure 1 This is a structural diagram of an embodiment of a sound-emitting unit provided by the utility model;

[0045] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of a sound-emitting unit provided by the present utility model;

[0046] Figure 3 This is a schematic cross-sectional view of an embodiment of a sound-emitting unit provided by the present invention;

[0047] Figure 4 for Figure 3 A local enlarged schematic diagram at point A;

[0048] Figure 5 A partial structural diagram of an embodiment of a sound-emitting unit provided by the utility model;

[0049] Figure 6 A partial structural diagram of another perspective of an embodiment of a sound-emitting unit provided by the utility model;

[0050] Figure 7 A schematic structural diagram of an embodiment of a diaphragm and a housing provided by the present invention;

[0051] Figure 8 This is a schematic cross-sectional view of an embodiment of a reinforcement portion and a reinforcement portion bracket provided by the present invention;

[0052] Figure 9 A structural diagram of an embodiment of a reinforcing portion and a reinforcing portion bracket provided by the present invention;

[0053] Figure 10 A structural schematic diagram of another embodiment of the reinforcing portion and the reinforcing portion bracket provided by the present invention;

[0054] Figure 11 This is a structural schematic diagram of an embodiment of a magnet assembly and a flat voice coil provided by the present invention;

[0055] Figure 12 A schematic diagram of the magnetic force line distribution of an embodiment of a magnet assembly and a flat voice coil provided by the present invention;

[0056] Figure 13A schematic structural diagram of an embodiment of a centering support plate and a housing provided by the present invention;

[0057] Figure 14 A structural schematic diagram of an embodiment of a support plate provided by the present utility model;

[0058] Figure 15 A structural diagram of an embodiment of the present invention in which a reinforcing rib is provided on the reinforcing portion;

[0059] Figure 16 This is a structural diagram of another embodiment of the sound-emitting unit provided by the utility model;

[0060] Figure 17 This is a schematic cross-sectional view of another embodiment of the sound-emitting unit provided by the present invention;

[0061] Figure 18 A schematic diagram of the magnetic force line distribution of another embodiment of the magnet assembly and the flat voice coil provided by the present invention;

[0062] Figure 19 A schematic structural diagram of an embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0063] Figure 20 A structural diagram of an embodiment of a front cover provided by the present utility model;

[0064] Figure 21 A structural diagram of another embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0065] Figure 22 A structural schematic diagram of another embodiment of the front cover provided by the utility model;

[0066] Figure 23 A structural schematic diagram of another embodiment of the front cover provided by the present utility model;

[0067] Figure 24 A structural diagram of another embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0068] Figure 25 This is a structural diagram of an embodiment of the present invention in which a sound-emitting unit is disposed in a housing.

[0069] Description of Figure Numbers:

[0070] 100, sound unit; 1, shell; 11, annular body; 12, side wall; 121, first through hole; 13, second through hole; 14, center; 15, end; 16, glue injection groove; 17, second welding pad; 2, magnetic circuit system; 21, support plate; 211, avoidance hole; 212, bottom plate; 213, enclosure; 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; 2211, second protrusion; 222, second magnet; 223, third magnet; 224, magnetic gap; 225, first protrusion; 226, fourth magnet; 3, vibration system; 31, diaphragm; 311, folding ring; 312, reinforcement; 3121, annular positioning portion; 3122, positioning groove; 313, Reinforcement rib; 314, micropore; 315, support portion; 32, flat voice coil; 321, first long axis segment; 322, second long axis segment; 33, vibration gap; 4, waterproof sealing ring; 41, first inclined surface; 42, second inclined surface; 43, annular step; 5, bracket; 51, main body; 52, first connecting portion; 53, second connecting portion; 54, third connecting portion; 6, reinforcement bracket; 61, cavity; 62, opening; 63, connecting Through hole; 64, reinforced bending portion; 7, waterproof breathable membrane; 8, centering support; 81, first fixing portion; 82, second fixing portion; 83, elastic arm portion; 84, glue injection hole; 85, first solder pad; 9, conductive connection portion; 91, main body; 92, external connection portion; 921, external solder pad; 10, pressing plate; 20, front cover; 201, mesh; 2011, first hole; 2012, second hole; 30, dust screen; 40, cover member;

[0071] 200. Shell.

[0072] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0074] 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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0075] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0076] With the development of thinner smart wearable products, the space left for speakers is gradually decreasing while the installation space of other components remains unchanged. This makes it difficult to improve the acoustic performance of speakers by increasing their volume. The limited internal space restricts the acoustic performance of existing speakers, making it difficult to improve the acoustic performance of speakers, so that they cannot meet the user's usage needs.

[0077] In view of this, it is necessary to propose a sound unit and an electronic device, aiming to solve the problem of how to improve the acoustic performance of the speaker.

[0078] See also Figure 1 、 Figure 3 and Figure 5As shown, in one embodiment of the present invention, the aspect ratio of the sound unit 100 is greater than 2:1. The sound unit 100 includes a shell 1, a magnetic circuit system 2, a vibration system 3 and a waterproof sealing ring 4. The magnetic circuit system 2 is connected to the shell 1. The magnetic circuit system 2 includes a support plate 21 and two magnet assemblies 22 spaced apart on the support plate 21. A magnetic gap 224 is formed between the two magnet assemblies 22. Each magnet assembly 22 includes a plurality of magnets arranged in sequence along a first direction. Each magnet assembly 22 has 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 along the first direction. The flat voice coil 32 is connected to the diaphragm 31 and is located in the magnetic gap 224. The axial direction of the flat voice coil 32 is arranged along a second direction, and the first direction is perpendicular to the second direction; the waterproof sealing ring 4 is connected to the side of the shell 1 away from the magnetic circuit system 2. The waterproof sealing ring 4 is arranged around the diaphragm 31. The shell 1, the waterproof sealing ring 4 and the diaphragm 31 are an integral injection molded part.

[0079] The sound-emitting unit 100 of the present invention may be a loudspeaker unit, and the sound-emitting unit 100 may be applied to a sound module of an electronic device, such as a computer, a mobile phone, a smart wearable device, etc. This embodiment is described by taking the sound-emitting unit 100 as a loudspeaker unit as an example.

[0080] The technical solution of the present invention is to provide two magnet assemblies 22 spaced apart from each other, each magnet assembly 22 having multiple magnets arranged sequentially along a first direction. By adjusting the magnetization direction of each magnet, the magnet assembly 22 has a magnetic field enhancement side facing the magnetic gap 224, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker. The waterproof sealing ring 4 is provided to improve the waterproof performance of the sound unit 100. By integrally injection-molding the housing 1, waterproof sealing ring 4, and diaphragm 31, the number of sealing surfaces is effectively reduced, thereby improving the waterproof performance of the sound unit 100. It should be noted that the height of the diaphragm 31 is lower than 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 sealed contact with the housing 200, the 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.

[0081] In this embodiment, the sound unit 100 has a narrow and long shape. It should be noted that the sound unit 100 has a height (thickness) along a first direction, as well as a length and width along a direction perpendicular to the first direction. The length-to-width ratio of the sound unit 100 is greater than 2:1, allowing it to better fit within the reserved space of a microelectronic device.

[0082] It should be noted that the aspect ratio of the sound unit 100 refers to the ratio of the length dimension of the sound unit 100 in the third direction to the width dimension of the sound unit 100 in the second direction, wherein the first direction, the second direction and the third direction are perpendicular to each other. Figure 1 The up and down directions shown are Figure 1 The left and right directions shown are Figure 1 Front-to-back orientation shown.

[0083] It should also be noted that when the flat voice coil 32 is energized, it reciprocates within the magnetic gap 224, cutting through the magnetic lines of force. This drives the diaphragm 31 to vibrate up and down, thereby inducing air to produce sound and completing the energy conversion between electricity and sound. The flat voice coil 32 can be directly connected to the diaphragm 31, or it can be connected to the diaphragm 31 via other structural components, such as a connecting frame.

[0084] According to an embodiment of the present invention, the outer side wall 12 of the waterproof sealing ring 4 has a first inclined surface 41 inclined inwardly, and the inner side wall 12 of the waterproof sealing ring 4 has a second inclined surface 42 inclined outwardly, and the angle between the first inclined surface 41 and the first direction is greater than the angle between the second inclined surface 42 and the first direction. With this arrangement, when the waterproof sealing ring 4 abuts against the housing 200 of the electronic device, the waterproof sealing ring 4 will be squeezed and bend inwards instead of folding outwards, which provides a guarantee for the sound unit 100 to have better waterproof performance. It should be noted that the angle between the first inclined surface 41 and the first direction is Figure 4 The angle between the second inclined surface 42 and the first direction is Figure 4 β in .

[0085] See also Figures 5 to 7 As shown, in one embodiment, the diaphragm 31 includes a rim 311 and a reinforcement 312 located in the center of the rim 311. The waterproof seal 4 surrounds the rim 311, and the flat voice coil 32 is connected to the reinforcement 312. The housing 1, waterproof seal 4, rim 311, and reinforcement 312 are integrally injection-molded. By integrally injection-molding the waterproof seal 4, rim 311, reinforcement 312, and housing 1, the number of sealing surfaces is effectively reduced, thereby improving the waterproof performance of the sound unit 100.

[0086] See also Figure 2 、 Figure 3 and Figure 19As shown, in one embodiment, the sound unit 100 further includes a front cover 20, which is provided on the side of the diaphragm 31 away from the magnetic circuit system 2. The front cover 20 is provided with a mesh 201, and the sound unit 100 further includes a dustproof net 30, which covers the mesh 201. By providing the mesh 201 on the front cover 20, the probability of sharp objects piercing the diaphragm 31 and causing the sound unit 100 to fail can be effectively reduced. The dustproof net 30 is provided to cover the mesh 201 in order to prevent external dust from falling onto the diaphragm 31 through the mesh 201 and affecting the acoustic performance of the sound unit 100. It should be noted that there are multiple meshes 201, and the shapes and sizes of the multiple meshes 201 are not exactly the same, and the distribution of the multiple meshes 201 can be adjusted as needed.

[0087] See also Figures 19 to 24 As shown, in one embodiment, the mesh 201 is irregular in shape; by adjusting the shape of the mesh 201 , the amplitude symmetry of the sound unit 100 can be adjusted.

[0088] In one embodiment, the mesh 201 includes a first hole 2011 and a second hole 2012, and the first hole 2011 and the second hole 2012 have different hole areas. The first holes 2011 and the second holes 2012 are staggered along the long side or the short side of the sound unit 100, or the first holes 2011 are interspersed between the second holes 2012, or the front cover 20 includes a first area corresponding to the first holes 2011 and a second area corresponding to the second holes 2012. By changing the arrangement of the first holes 2011 and the second holes 2012, the amplitude symmetry of the sound unit 100 can also be effectively adjusted.

[0089] See also Figure 2 and Figure 3 As shown, in one embodiment, an annular step 43 is formed at the connection between the waterproof sealing ring 4 and the folding ring 311, and the front cover 20 is arranged on the annular step 43 and located inside the waterproof sealing ring 4. By forming the annular step 43, the front cover 20 is reliably supported. When the front cover 20 is placed on the annular step 43, the front cover 20 does not increase the size of the entire sound unit 100 due to the protrusion of the waterproof sealing ring 4. The placement of the front cover 20 on the annular step 43 and inside the waterproof sealing ring 4 effectively reduces the size of the sound unit 100, thereby enabling the sound unit 100 to better adapt to the needs of a narrow installation environment.

[0090] See also Figure 2 and Figure 6 As shown, in one embodiment, the vibration system 3 further includes a bracket 5, and the reinforcement portion 312 and the flat voice coil 32 are both connected to the bracket 5; the bracket 5 is provided to transmit the driving force of the flat voice coil 32, thereby driving the diaphragm 31 to vibrate.

[0091] See also Figure 17As shown, in one embodiment, the reinforcement portion 312 includes a support portion 315 protruding along a first direction, which is connected to the flat voice coil 32. The support portion 315 replaces the existing bracket 5, eliminating the bracket 5 as a structural component, reducing the installation process and lowering the production cost of the sound unit 100. It should be noted that the reinforcement portion 312 can be made of a polymer material, such as polyphthalamide, polyphthalamide plus 35% glass fiber, carbon fiber, metal alloy, or other materials.

[0092] See also Figures 8 to 10 As shown, according to an embodiment of the present invention, the vibration system 3 further includes a reinforcing bracket 6, which is arranged on the side of the reinforcing portion 312 facing the flat voice coil 32, and the reinforcing bracket 6 is bent along a first direction toward the flat voice coil 32 to form a reinforcing bent portion 64; the ratio of the height of the reinforcing bent portion 64 along the first direction to the width of the reinforcing portion 312 along the second direction is greater than 1:4; or, the ratio of the height of the reinforcing bent portion 64 along the first direction to the width of the reinforcing portion 312 along the second direction is not less than 1:10 and not greater than 1:4. Among them, the ratio of the height of the reinforcing bend portion 64 along the first direction to the width of the reinforcing portion 312 along the second direction is greater than 1:4. Through this setting, the split vibration frequency of the reinforcing portion 312 can be located after 10kHz; the ratio of the height of the reinforcing bend portion 64 along the first direction to the width of the reinforcing portion 312 along the second direction is not less than 1:10 and not greater than 1:4. Through this setting, the split vibration frequency of the reinforcing portion 312 can be located between 4kHz and 10kHz. It should be noted that the height of the reinforcing bend portion 64 along the first direction is Figure 8 In a, the width of the reinforcement portion 312312 along the second direction is Figure 8 Middle b.

[0093] See also Figure 9 As shown, according to one embodiment of the present invention, the reinforcement bracket 6 is hollow to form a cavity 61, and at least one of the two ends of the reinforcement bracket 6 is provided with an opening 62 connected to the cavity 61, and the cavity 61 is connected to the microholes 314 on the reinforcement part 312 to balance the internal and external air pressures of the sound unit 100.

[0094] See also Figure 10 As shown, according to another embodiment of the present invention, the reinforcing bracket 6 is hollow and forms a cavity 61, and the cavity 61 is connected to the micropores 314 on the reinforcing part 312. The outer wall of the reinforcing bracket 6 is provided with a connecting hole 63 connected to the cavity 61. There are multiple connecting holes 63, and the multiple connecting holes 63 are arranged in sequence along the extension direction of the reinforcing bracket 6; the connecting holes 63 are provided to balance the internal and external air pressures of the sound unit 100.

[0095] See also Figure 7As shown, in one embodiment, the reinforcement portion 312 is provided with a plurality of micropores 314, and the sound unit 100 further includes a waterproof breathable membrane 7 covering the micropores 314; by providing a plurality of micropores 314 on the reinforcement portion 312, it is beneficial to balance the air pressure inside and outside the sound unit 100, and by providing a waterproof breathable membrane 7 covering the micropores 314, while ensuring the balance of the air pressure inside and outside the sound unit 100, the waterproof performance of the sound unit 100 is also effectively improved.

[0096] In one embodiment, at least a portion of the reinforcement portion 312 is constructed of a breathable material, and the acoustic unit 100 further includes a waterproof breathable membrane 7 covering the breathable material. This configuration facilitates pressure balance between the interior and exterior of the acoustic unit 100. The provision of the waterproof breathable membrane 7, while ensuring pressure balance between the interior and exterior of the acoustic unit 100, effectively enhances the waterproof performance of the acoustic unit 100. It should be noted that the breathable material may be an organic aerogel or a foamed metal.

[0097] See also Figure 15 As shown, in one embodiment, the reinforcement portion 312 is provided with a reinforcement rib 313, which is located in the central area of ​​the reinforcement portion 312 and extends along the long side direction of the shell 1. By providing the reinforcement rib 313 to strengthen the structure of the reinforcement portion 312, the resonance of the reinforcement portion 312 can be effectively moved to a high frequency. It should be noted that the long side direction is Figure 1 Front-to-back orientation shown.

[0098] See also 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; a waterproof sealing ring 4 is connected to the annular body 11, and the sidewall 12 is provided with a first through-hole 121. Each magnet assembly 22 has a first protrusion 225 extending into the first through-hole 121. By providing the first through-hole 121 in the sidewall 12, each magnet assembly 22 can extend outward to form the first protrusion 225, thereby increasing the volume of each magnet assembly 22, improving the magnetic field strength, and thereby enhancing the acoustic performance of the sound unit 100. It should be noted that the first through-hole 121 passes through two sidewalls 12 arranged opposite each other along the second direction. The two outer walls of each magnet assembly 22 arranged opposite each other along the second direction both extend outward to form the first protrusion 225, and the two first protrusions 225 are respectively located within the two first through-holes 121.

[0099] According to one embodiment of the present invention, a side of the first magnet 221 near the magnetic gap 224 protrudes along the first direction away from the support plate 21 to form a second protrusion 2211. The housing 1 defines a second through-hole 13 for accommodating the second protrusion 2211, which communicates with the magnetic gap 224. The provision of the second protrusion 2211 increases the size of the first magnet 221, further expanding the magnetic field area of ​​the flat voice coil 32 and ensuring that the driving force factor of the flat voice coil 32 is symmetrical relative to the static equilibrium position.

[0100] See also Figure 1 、 Figure 2 、 Figure 11 and Figure 12 As shown, in one embodiment, the magnet assembly 22 includes a first magnet 221, a second magnet 222 and a third magnet 223 arranged in sequence along the first direction, and the first magnet 221 and the third magnet 223 are both magnetized along the second direction and in opposite magnetization directions; the second magnet 222 is magnetized along the first direction, and the polarity of the magnetic pole of the second magnet 222 facing the first magnet 221 is the same as the polarity of the magnetic pole of the first magnet 221 close to the magnetic gap 224, so that the magnet assemblies 22 can all form a magnetic field enhancement side facing the magnetic gap 224, and the polarities of the magnetic poles of the two first magnets 221 close to the magnetic gap 224 are opposite, so that the magnetic lines of force of the two magnet assemblies 22 form a ring state. In this embodiment, the first magnet 221 and the third magnet 223 are magnetized along the second direction and the magnetization directions are opposite, the second magnet 222 is magnetized along the first direction, and the polarity of the magnetic pole of the second magnet 222 facing the first magnet 221 is the same as the polarity of the magnetic pole of the first magnet 221 close to the magnetic gap 224, so that the magnet assembly 22 can form a magnetic field enhancement side facing the magnetic gap 224, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker. Among them, the first direction is the up and down direction shown in the figure, and the second direction is the left and right direction shown in the figure. Taking the first magnet 221 magnetized to the left as an example, the second magnet 222 located on the left side of the magnetic gap 224 is magnetized downward, the second magnet 222 located on the right side of the magnetic gap 224 is magnetized upward, and the third magnet 223 is magnetized to the right, so that the magnet assembly 22 forms a magnetic field enhancement side toward the magnetic gap 224, and the polarities of the magnetic poles of the two first magnets 221 close to the magnetic gap 224 are opposite, so that the magnetic lines of force of the two magnet assemblies 22 can form a complete magnetic line closed loop, thereby increasing the magnetic field strength and improving the acoustic performance of the speaker.

[0101] See also Figure 14As shown, according to one embodiment of the present invention, the support plate 21 includes a base plate 212, a peripheral panel 213 disposed around the periphery of the base plate 212, and first and second mounting ears 214, 215 disposed at opposite ends of the peripheral panel 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 the third direction. The second mounting ear 215 is provided with a second mounting hole 2151 and a second positioning hole 2152 spaced apart along the third direction. The second positioning hole 2152 extends through the outer edge of the second mounting ear 215 along the third direction, with the first, second, and third directions being perpendicular to each other. The provision of the first and second mounting holes 2141, 2151 facilitates installation of the sound unit 100, while the provision of the first and second positioning holes 2142, 2152 facilitates precise positioning of the sound unit 100, preventing the sound unit 100 from deflecting during assembly to the housing 200.

[0102] See also Figure 3 and Figure 11 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 in sequence along the first direction, the first long axis segment 321 is connected to the diaphragm 31, and the first long axis segment 321 and the second long axis segment 322 both extend along the 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 eighty percent of the height of the first long axis segment 321 along the first direction; through this arrangement, the number of magnetic lines of force passing through the first long axis segment 321 is increased, the driving force of the flat voice coil 32 is improved, and the acoustic performance of the sound unit 100 is enhanced.

[0103] In one embodiment, the thickness of the third magnet 223 along the first direction is not less than eighty percent of the height of the second long axis segment 322 along the first direction; through this arrangement, the number of magnetic lines of force passing through the second long axis segment 322 is increased, the driving force of the flat voice coil 32 is improved, and the acoustic performance of the sound unit 100 is enhanced.

[0104] In one embodiment, the thickness of the first magnet 221 and the third magnet 223 along the first direction is greater than the thickness of the second magnet 222 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, thereby increasing the driving force of the flat voice coil 32 and enhancing the acoustic performance of the sound unit 100.

[0105] In one embodiment, the support plate 21 is made of a non-magnetic material to allow the magnetic flux of the third magnet 223 to pass more along the second direction through the flat voice coil 32. A clearance groove is defined on the support plate 21, corresponding to the magnetic gap 224, for the flat voice coil 32 to avoid the passage of the flat voice coil. The clearance groove communicates with the magnetic gap 224, providing the flat voice coil 32 with a greater vibration space. It should be noted that the non-magnetic material used for the support plate 21 allows more magnetic flux to pass through the flat voice coil 32, thereby preventing magnetic flux dispersion.

[0106] See also Figure 2 and Figure 3 As shown, in one embodiment, the support plate 21 has a clearance hole 211 corresponding to the magnetic gap 224 for the flat voice coil 32 to pass through. The speaker 100 also includes a cover 40 that covers the clearance hole 211. The cover 40 is located on the side of the support plate 21 away from the magnet assembly 22. The clearance hole 211 provides a larger vibration space for the flat voice coil 32. The cover 40 covering the clearance hole 211 also helps adjust the amplitude symmetry of the speaker 100. It should be noted that the cover 40 can be a cover plate or a nylon mesh.

[0107] According to one embodiment of the present invention, the vibration system 3 further includes a bracket 5, which includes a main body 51 extending in a first direction, a first connecting portion 52 and a second connecting portion 53 located at opposite ends of the main body 51 along the first direction and bent in a second direction, and a third connecting portion 54 extending from the inner end of the main body 51 in the first direction. The first connecting portion 52 is connected to the reinforcement portion 312, the second connecting portion 53 is connected to the second fixing portion 82, and the third connecting portion 54 is connected to the side of the flat voice coil 32. This arrangement enables the bracket 5 to smoothly transmit the driving force of the flat voice coil 32, thereby driving the diaphragm 31 to vibrate. It should be noted that there are two brackets 5, each located at opposite ends of the flat voice coil 32 along the third direction, effectively reducing the probability of polarization of the flat voice coil 32.

[0108] See also Figure 2 、 Figure 9 and Figure 10 As shown, according to another embodiment of the present invention, an annular positioning portion 3121 is provided on the side of the reinforcement portion 312 facing the magnet assembly 22. A positioning groove 3122 is formed in the middle of the annular positioning portion 3121. The first connecting portion 52 extends into the first positioning groove 3122 and connects to the reinforcement portion 312. The provision of the annular positioning portion 3121 facilitates assembly of the bracket 5. The number of annular positioning portions 3121 matches the number of brackets 5 and is provided in a one-to-one correspondence.

[0109] See also Figure 17 and Figure 18As shown, in one embodiment, the magnet assembly 22 further includes a fourth magnet 226, which is arranged on a side of the third magnet 223 away from the second magnet 222 along the first direction. The fourth magnet 226 is magnetized along the first direction, and 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 close to the magnetic gap 224, so that the magnet assembly 22 can form a magnetic field enhancement side facing the magnetic gap 224, and the polarity of the magnetic poles of the two first magnets 221 close to the magnetic gap 224 is opposite. In this embodiment, the first magnet 221 and the third magnet 223 are both magnetized along the second direction and the magnetization directions are opposite, 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 magnetic pole of the second magnet 222 facing the first magnet 221 is the same as the polarity of the magnetic pole of the first magnet 221 close to 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 close to the magnetic gap 224, so that the magnet assembly 22 can form a magnetic field enhancement side facing the magnetic gap 224, and the polarity of the magnetic poles of the two first magnets 221 close to the magnetic gap 224 is opposite, so that the magnetic lines of force of the two magnet assemblies 22 form a ring state, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker. Among them, the first direction is the up and down direction shown in the figure, and the second direction is the left and right direction shown in the figure. Taking the first magnet 221 magnetized to the left as an example, the second magnet 222 located on the left side of the magnetic gap 224 is magnetized downward, the second magnet 222 located on the right side of the magnetic gap 224 is magnetized upward, the third magnet 223 is magnetized to the right, the fourth magnet 226 located on the left side of the magnetic gap 224 is magnetized upward, and the fourth magnet 226 located on the right side of the magnetic gap 224 is magnetized downward, so that the magnet assembly 22 forms a magnetic field enhancement side toward the magnetic gap 224, and the polarities of the two first magnets 221 close to the magnetic gap 224 are opposite, so that the magnetic lines of force of the two magnet assemblies 22 can form a complete magnetic line closed loop, thereby increasing the magnetic field strength and improving the acoustic performance of the speaker.

[0110] In one embodiment, the flat voice coil 32 includes a first long axis segment 321 and a second long axis segment 322 arranged in sequence along the first direction, the first long axis segment 321 is connected to the diaphragm 31, and the first long axis segment 321 and the second long axis segment 322 both extend along the 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 eighty percent of the height of the first long axis segment 321 along the first direction; through this arrangement, the number of magnetic lines of force passing through the first long axis segment 321 is increased, the driving force of the flat voice coil 32 is improved, and the acoustic performance of the sound unit 100 is enhanced.

[0111] In one embodiment, the thickness of the second magnet 222 along the first direction is not less than eighty percent of the height of the second long axis segment 322 along the first direction; through this arrangement, the number of magnetic lines of force passing through the second long axis segment 322 is increased, the driving force of the flat voice coil 32 is improved, and the acoustic performance of the sound unit 100 is enhanced.

[0112] 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; through this arrangement, the number of magnetic lines of force passing through the first long axis segment 321 and the second long axis segment 322 is increased, the driving force of the flat voice coil 32 is improved, and the acoustic performance of the sound unit 100 is enhanced.

[0113] 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. This configuration increases the number of magnetic flux lines passing through the support plate 21, thereby increasing the number of magnetic flux 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 speaker 100.

[0114] In one embodiment, the support plate 21 is made of a magnetically conductive material. The support plate 21 corrects the magnetic flux of the fourth magnet 226 so that more magnetic flux can pass through the flat voice coil 32, thereby enhancing the induction strength of the flat voice coil 32 and improving the acoustic performance of the speaker.

[0115] See also Figure 1 、 Figure 2 and Figure 6 As shown, in one embodiment, the sound unit 100 further includes a centering damper 8, which includes a first fixing portion 81, an elastic arm portion 83, and a second fixing portion 82. The first fixing portion 81 is disposed on the housing 1, and the second fixing portion 82 is connected to the flat voice coil 32. The ends of the elastic arm portion 83 are respectively connected to the first fixing portion 81 and the second fixing portion 82. The magnet assemblies 22 each have a clearance space to avoid the centering damper 8. The provision of the centering damper 8 reduces the probability of polarization of the flat voice coil 32 and improves the vibration stability of the flat voice coil 32. In this embodiment, the magnet assemblies 22 form a space for the centering damper 8 to be installed.

[0116] In one embodiment, two centering supports 8 are provided, one at each end of the longitudinal direction of the housing 1. The two centering supports 8 are connected by a conductive connector 9, which is also provided with an external solder pad 921 for electrical connection to an external circuit. By arranging the conductive connector 9 along the longitudinal direction of the housing 1, the two centering supports 8 are electrically connected, thereby facilitating the introduction of external circuit current into the flat voice coil 32.

[0117] In one embodiment, the conductive connecting portion 9 and the centering support piece 8 are integrally formed. By integrally forming the conductive connecting portion 9 and the centering support piece 8, the number of parts to be assembled is reduced, and the assembly steps are omitted, which not only improves the assembly efficiency of the sound unit 100 but also avoids assembly errors.

[0118] In one embodiment, the conductive connection portion 9 includes a main portion 91 that connects the two centering rails 8 and an external connection portion 92 connected to one end of the main portion 91. The external connection portion 92 is provided with an external solder pad 921. The main portion 91 is disposed on the side of the magnetic circuit system 2, and the outer surface of the main portion 91 does not extend beyond the outer surface of the housing 1. The outer surface of the main portion 91 does not extend beyond the outer surface of the housing 1, thereby preventing the protrusion of the main portion 91 from increasing the overall size of the sound unit 100 and the risk of interference between the main portion 91 and other components of the electronic device.

[0119] See also Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, the conductive connecting portion 9 includes a main body 91 connecting the two centering supports 8 and an external connecting portion 92 connected to one end of the main body 91. The external connecting portion 92 is provided with an external soldering pad 921. The main body 91 is provided on the side of the magnetic circuit system 2. The sound unit 100 also includes a pressure plate 10, which is connected to the housing 1. The main body 91 is provided between the third magnet 223 and the pressure plate 10. The outer surface of the pressure plate 10 does not extend beyond the outer surface of the housing 1. The pressure plate 10 is provided to prevent the main body 91 from tilting up and interfering with other parts. The outer surface of the pressure plate 10 does not extend beyond the outer surface of the housing 1 to avoid the pressure plate 10 protruding from the outer surface of the housing 1, which would increase the overall size of the sound unit 100 and to avoid the pressure plate 10 protruding from the outer surface of the housing 1 and interfering with other parts. It should be noted that the pressure plate 10 is provided with a rivet hole, which can be fixedly connected to the hot melt rivet stud provided on the housing 1.

[0120] See also Figure 2 and Figure 14 As shown, in one embodiment, the housing 1 includes an annular body 11 and a side wall 12 connected to the annular body 11. The magnetic circuit system 2 includes a support plate 21, which includes a bottom plate 212 and a surrounding plate 213. The magnet assembly 22 is disposed on the bottom plate 212, and the surrounding plate 213 is connected to the side wall 12. The first fixing portion 81 is sandwiched between the surrounding plate 213 and the side wall 12. The first fixing portion 81 is sandwiched between the surrounding plate 213 and the side wall 12, thereby effectively fixing the first fixing portion 81 and improving the vibration stability of the flat voice coil 3232.

[0121] See also Figure 2 and Figure 13As shown, in one embodiment, the first fixing portion 81 is provided with a glue injection hole 84, and the shell 1 is provided with a glue injection groove 16 connected to the glue injection hole 84 corresponding to the glue injection hole 84, and the glue injection hole 84 and the glue injection groove 16 are used to accommodate glue; glue is injected into the glue injection groove 16 through the glue injection hole 84, so that the first fixing portion 81 is connected to the shell 1 through the solidified glue, thereby improving the reliability of the connection between the first fixing portion 81 and the shell 1.

[0122] See also Figure 2 and Figure 13 As shown, in one embodiment, the first fixing portion 81 is provided with a first soldering pad 85, and the shell 1 is provided with a second soldering pad 17 welded to the first soldering pad 85 corresponding to the first soldering pad 85; by welding the first soldering pad 85 and the second soldering pad 17, the reliability of the connection between the first fixing portion 81 and the shell 1 is improved.

[0123] 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 be no greater than 20:1 facilitates 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 inner length of the flat voice coil 32 along the third direction to the inner width of the flat voice coil 32 along the first direction.

[0124] In one embodiment, the aspect ratio of the sound unit 100 is not greater than 10:1, thereby better adapting to the installation requirements of some existing narrow installation environments.

[0125] See also Figure 16 and Figure 25As shown, in one embodiment, the housing 1 has a central portion 14 and end portions 15 located at opposite ends of the central portion 14 along the longitudinal direction of the housing 1. The central portion 14 protrudes toward the side away from the flat voice coil 32. It should be noted that the outer surface of the central portion 14, which is close to the diaphragm 31, protrudes toward the side away from the flat voice coil 32. The protrusion of the central portion 14 toward the side away from the flat voice coil 32 is intended to better conform to the shape of the electronic device's housing 200, allowing the housing 1 to extend along the housing 200 and achieve a sealed abutment between the two. The protrusion of the central portion 14 toward the side away from the flat voice coil 32 gives the housing 1 a curved or nearly curved shape to conform to the shape of the housing 200, thereby improving the utilization 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 matching the shape of the housing 1 with that of the outer shell 200, a portion of the gap is used as the vibration space of the diaphragm 31. This increases the vibration space of the diaphragm 31 without increasing the installation space of the sound unit 100. It also increases the volume of the acoustic cavity in front of the sound unit 100, thereby effectively improving the acoustic performance of the sound unit 100. It should be noted that the outer surface of the housing 1 can be an entire arc-shaped structure, or the center portion 14 can be a flat surface and the end portions 15 can be flat or curved. Alternatively, the center portion 14 can be a curved surface and the end portions 15 can be a flat or curved surface.

[0126] See also Figure 25 As shown, the present invention also provides an electronic device, comprising a housing 200 and the aforementioned sound unit 100, with the sound unit 100 disposed within the housing 200. The electronic device may be a computer, a mobile phone, a smart wearable device, or the like. Because the electronic device employs all of the technical solutions of all of the aforementioned embodiments, it at least possesses all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and no further details will be given here.

[0127] The above are merely exemplary embodiments of the present invention and are not intended to limit the patent scope 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 in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: The aspect ratio of the sound-emitting monomer is greater than 2:1, and the sound-emitting monomer includes: case; a magnetic circuit system connected to the housing, the magnetic circuit system comprising a support plate and two magnet assemblies spaced apart from each other, a magnetic gap formed between the two magnet assemblies, each magnet assembly comprising a plurality of magnets sequentially arranged along a first direction, each magnet assembly having a magnetic field enhancement side facing the magnetic gap; a vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along the first direction, the flat voice coil being connected to the diaphragm and positioned within the magnetic gap, the axial direction of the flat voice coil being arranged along a second direction, the first direction being perpendicular to the second direction; A waterproof sealing ring is connected to a side of the housing away from the magnetic circuit system. The waterproof sealing ring is arranged around the diaphragm. The housing, the waterproof sealing ring and the diaphragm are an integral injection-molded part.

2. The sound-emitting unit according to claim 1, characterized in that: The diaphragm includes a folding ring and a reinforcement part arranged in the central area of ​​the folding ring. The waterproof sealing ring is arranged around the folding ring. The flat voice coil is connected to the reinforcement part. The shell, the waterproof sealing ring, the folding ring and the reinforcement part are an integral injection molded part.

3. The sound-emitting unit according to claim 2, characterized in that: The sound-emitting unit further includes a front cover, which is arranged on a side of the diaphragm away from the magnetic circuit system. The front cover is provided with mesh holes. The sound-emitting unit further includes a dust-proof net, which covers the mesh holes.

4. The sound-emitting unit according to claim 3, characterized in that: An annular step is formed at the connection between the waterproof sealing ring and the folding ring, and the front cover is arranged on the annular step and is located on the inner side of the waterproof sealing ring.

5. The sound-emitting unit according to claim 2, characterized in that: The vibration system further includes a bracket, and the reinforcement portion and the flat voice coil are both connected to the bracket; Alternatively, the reinforcing portion includes a supporting portion protruding along the first direction, and the supporting portion is connected to the flat voice coil.

6. The sound-emitting unit according to claim 2, characterized in that: The reinforcing portion is provided with a plurality of micropores, and the sound-emitting unit further comprises a waterproof and breathable membrane covering the micropores; Alternatively, at least a portion of the reinforcing portion is made of a breathable material, and the sound-emitting unit further comprises a waterproof breathable membrane covering the breathable material; And / or, the reinforcement portion is provided with a reinforcement rib, and the reinforcement rib is located in a central area of ​​the reinforcement portion and extends along the long side direction of the shell.

7. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The shell includes an annular body and a side wall connected to the annular body; the waterproof sealing ring is connected to the annular body, the side wall is provided with a first through hole, and the magnet assembly has a first protrusion extending into the first through hole.

8. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: Each of the magnet assemblies includes a first magnet, a second magnet, and a third magnet arranged in sequence along the first direction, the third magnet is arranged on the support plate, the first magnet and the third magnet are magnetized along the second direction and in opposite directions; the second magnet is magnetized along the first direction, and 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.

9. The sound-emitting unit according to claim 8, characterized in that: The flat voice coil includes a first long axis segment and a second long axis segment arranged in sequence along the first direction, the first long axis segment is connected to the diaphragm, and the first long axis segment and the second long axis segment both 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 along the first direction is not less than 80 percent of the height of the first long axis segment along the first direction; And / or, the thickness of the third magnet along the first direction is not less than eighty percent of the height of the second long axis segment along the first direction; And / or, the thickness of the first magnet and the third magnet along the first direction is greater than the thickness of the second magnet along the first direction.

10. The sound-emitting unit according to claim 8, characterized in that: The support plate is made of non-magnetic material; The support plate is provided with an avoidance groove corresponding to the magnetic gap for avoiding the flat voice coil; Alternatively, the support plate is provided with an avoidance hole corresponding to the magnetic gap for avoiding the flat voice coil, and the sound unit further includes a covering member covering the avoidance hole, and the covering member is arranged on a side of the support plate away from the magnet assembly.

11. The sound-emitting unit according to claim 8, wherein: The magnet assembly also includes a fourth magnet, which is arranged on a side of the third magnet away from the second magnet along the first direction. The fourth magnet is magnetized along the first direction. 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. The polarities of the magnetic poles of the two first magnets close to the magnetic gap are opposite.

12. The sound-emitting unit according to claim 11, wherein: The flat voice coil includes a first long axis segment and a second long axis segment arranged in sequence along the first direction, the first long axis segment is connected to the diaphragm, and the first long axis segment and the second long axis segment both 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 along the first direction is not less than 80 percent 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 eighty percent 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 and 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 and the third magnet along the first direction.

13. The sound-emitting unit according to claim 11, wherein: The support plate is made of magnetic conductive material.

14. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The sound unit also includes a centering support plate, which includes a first fixing part, an elastic arm part and a second fixing part. The first fixing part is arranged on the shell, the second fixing part is connected to the flat voice coil, and the two ends of the elastic arm part are respectively connected to the first fixing part and the second fixing part.

15. The sound-emitting unit according to claim 14, characterized in that: The two centering support plates are respectively arranged at the two ends of the long side direction of the shell, and the two centering support plates are connected by a conductive connecting part. The conductive connecting part is also provided with an external soldering pad that can be electrically connected to an external circuit.

16. The sound-emitting unit according to claim 15, characterized in that: The conductive connecting portion and the centering support piece are integrally formed. And / or, the conductive connecting part includes a main body connecting the two centering support plates and an external connecting part connected to one end of the main body, the external connecting part is provided with the external welding pad, the main body is provided on the side of the magnetic circuit system, and the outer surface of the main body does not exceed the outer surface of the shell.

17. The sound-emitting unit according to claim 14, wherein: The shell includes an annular body and a side wall connected to the annular body, the magnetic circuit system includes a support plate, the support plate includes a base plate and a surrounding plate, the magnet assembly is arranged on the base plate, the surrounding plate is connected to the side wall, and the first fixing portion is clamped between the surrounding plate and the side wall.

18. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The aspect ratio of the inner diameter of the flat voice coil is not greater than 20:1; And / or, the aspect ratio of the sound unit is not greater than 10:1; And / or, the housing has a central portion and end portions located at both ends of the central portion along a longitudinal direction of the housing, and the central portion protrudes toward a side away from the flat voice coil.

19. An electronic device, characterized in that: The electronic device includes a housing and a sound-emitting unit according to any one of claims 1 to 18, wherein the sound-emitting unit is arranged in the housing.

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