Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production single body and electronic equipment, the sound production single body comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system comprises a support plate and two magnet assemblies, a magnetic gap is formed between the two magnet assemblies, the support plate is made of a non-magnetic material, and the vibration system is arranged in the shell. Each magnet assembly comprises a first magnet, a second magnet and a third magnet which are stacked in the first direction, the first magnet and the third magnet are magnetized in the second direction, the magnetizing directions are opposite, and the first direction is perpendicular to the second direction; the second magnet is magnetized in the first direction, and the polarity of the magnetic pole, facing the first magnet, of the second magnet is the same as that of the magnetic pole, close to one side of the magnetic gap, of the first magnet, so that each magnet assembly forms a magnetic field enhancement side facing the magnetic gap; the vibration system comprises a diaphragm and a flat voice coil, one side of the flat voice coil is connected with the reinforcing part, and the other side of the flat voice coil is located in the magnetic gap. The magnet assembly can form 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 invention relates to the technical field of sound energy conversion, and 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. Summary of the invention

[0003] The main purpose of the present invention is to provide a sound-emitting unit and an electronic device, aiming to solve the problem of how to improve the acoustic performance of a loudspeaker.

[0004] In order to achieve the above-mentioned object, the present invention 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, the magnetic circuit system comprises a support plate and two magnet assemblies arranged alternately on the support plate, a magnetic gap is formed between the two magnet assemblies, the support plate is made of non-magnetic material, each of the magnet assemblies comprises a first magnet, a second magnet and a third magnet arranged in sequence along a first direction, the third magnet is arranged on the support plate, the first magnet and the third magnet are magnetized along a second direction and in opposite directions, and the first direction is perpendicular to the second direction; 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, so that each of the magnet assemblies can form a magnetic field enhancement side facing the magnetic gap, and the polarities of the magnetic poles of the two first magnets close to the magnetic gap are opposite;

[0007] A vibration system, the vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along the first direction, the diaphragm comprising a folding ring and a reinforcement portion arranged in the central area of ​​the folding ring, the folding ring is connected to the shell, the flat voice coil is connected to the reinforcement portion and is located in the magnetic gap, and the axial direction of the flat voice coil is arranged along the second direction.

[0008] In one embodiment, the sound-emitting unit further comprises a waterproof sealing ring, and the waterproof sealing ring is arranged around the folding ring;

[0009] The waterproof sealing ring, the folding ring, the reinforcing part and the housing are integrally injection-molded.

[0010] Alternatively, the outer side wall of the waterproof sealing ring has a first inclined surface inclined inwardly, and the inner side wall of the waterproof sealing ring has a second inclined surface inclined outwardly, and the angle between the first inclined surface and the first direction is greater than the angle between the second inclined surface and the first direction.

[0011] 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;

[0012] Alternatively, the reinforcement portion has a support portion that bends and extends along the first direction, and the support portion is connected to the flat voice coil;

[0013] And / or, the vibration system also includes a reinforcing bracket, which is arranged on the side of the reinforcing portion facing the flat voice coil, and the reinforcing bracket is bent along the first direction toward the flat voice coil to form a reinforcing bent portion; the ratio of the height of the reinforcing bent portion along the first direction to the width of the reinforcing portion along the second direction is greater than 1:4; or, the ratio of the height of the reinforcing bent portion along the first direction to the width of the reinforcing portion along the second direction is not less than 1:10 and not greater than 1:4.

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

[0015] Alternatively, at least part of the structure of the reinforcement part is a breathable material, and the sound-emitting unit further includes 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 housing includes an annular body and a side wall 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] And / or, one side of the first magnet close to the magnetic gap protrudes along the first direction away from the support plate to form a second protrusion, and the shell is provided with a second through hole for avoiding the second protrusion, and the second through hole is connected to the magnetic gap.

[0019] 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, wherein the first fixing portion is arranged on the shell, the second fixing portion is connected to the flat voice coil, and two ends of the elastic arm portion are respectively connected to the first fixing portion and the second fixing portion.

[0020] 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, and 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.

[0021] In one embodiment, the shell includes an annular body and a side wall connected to the annular body, the support plate includes a bottom plate and a surrounding plate, the magnet assembly is arranged on the bottom plate, the surrounding plate is connected to the side wall, and the first fixing portion is sandwiched between the surrounding plate and the side wall;

[0022] And / or, the first fixing portion is provided with a glue injection hole, the housing is provided with a glue injection groove corresponding to the glue injection hole and connected with the glue injection hole, and the glue injection hole and the glue injection groove are used to contain glue;

[0023] And / or, the first fixing portion is provided with a first soldering pad, and the housing is provided with a second soldering pad corresponding to the first soldering pad and soldered to the first soldering pad;

[0024] And / or, the vibration system also includes a bracket, which includes a main body extending along a first direction, a first connecting part and a second connecting part located at both ends of the main body along the first direction and bent along a second direction, and a third connecting part extending from the inner end of the main body along the first direction, the first connecting part is connected to the reinforcement part, the second connecting part is connected to the second fixing part, and the third connecting part is connected to the side of the flat voice coil.

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

[0026] 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 welding pad, the main body part is arranged on the side of the magnetic circuit system, and the outer surface of the main body part does not exceed the outer surface of the shell;

[0027] 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 arranged on the side of the magnetic circuit system, the sound unit also includes a pressure plate, the pressure plate is connected to the shell, the main body is arranged between the third magnet and the pressure plate, and the outer surface of the pressure plate does not exceed the outer surface of the shell.

[0028] In one embodiment, the sound unit further includes a front cover, the front cover is arranged on a side of the diaphragm away from the magnetic circuit system, the front cover is provided with mesh holes, and the sound unit further includes a dustproof net, the dustproof net covers the mesh holes.

[0029] In one embodiment, the sound-emitting unit further comprises a waterproof sealing ring, the 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 folding ring and forms an annular step at the connection with the folding ring, and the front cover is arranged on the annular step and located on the inner side of the waterproof sealing ring;

[0030] And / or, the mesh is of irregular shape;

[0031] And / or, the mesh includes a first hole and a second hole, and the first hole and the second hole have different hole areas;

[0032] The first holes and the second holes are alternately arranged along the long side or the short side of the sound unit, or the first holes are interspersed between the second holes, or the front cover includes a first area corresponding to the first holes and a second area corresponding to the second holes.

[0033] 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, 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;

[0034] The thickness of the first magnet along the first direction is not less than eighty percent of the height of the first long axis segment along the first direction;

[0035] 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;

[0036] 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.

[0037] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil is no greater than 20:1;

[0038] And / or, the aspect ratio of the sound-emitting unit is not greater than 10:1;

[0039] And / or, the housing has a central portion and end portions located at both ends of the central portion along a long side direction of the housing, and an outer surface of the central portion protrudes toward a side away from the flat voice coil.

[0040] In one embodiment, the support plate is provided with an avoidance groove corresponding to the magnetic gap for avoiding the flat voice coil;

[0041] Or, 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 along the first direction;

[0042] And / or, the support plate includes a base plate, a surrounding plate arranged on the periphery of the base plate, and a first mounting ear and a second mounting ear arranged 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, and the first direction, the second direction and the third direction are perpendicular to each other.

[0043] The present invention further provides an electronic device, comprising a housing and the above-mentioned sound-emitting unit, wherein the sound-emitting unit is arranged in the housing.

[0044] The technical solution of the present invention is to set two magnet assemblies at intervals, each magnet assembly is stacked along the first direction using a first magnet, a second magnet and a third magnet, the first magnet and the third magnet are magnetized along the second direction and the magnetization directions are opposite, 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, so that each magnet assembly can form 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

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0046] Figure 1 A schematic structural diagram of an embodiment of a sound-emitting unit provided by the present invention;

[0047] Figure 2 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

[0048] Figure 3 A schematic cross-sectional view of an embodiment of a sound-emitting unit provided by the present invention;

[0049] Figure 4 for Figure 3 A local enlarged schematic diagram at point A;

[0050] Figure 5 A partial structural schematic diagram of an embodiment of a sound-emitting unit provided by the present invention;

[0051] Figure 6 A partial structural schematic diagram of another perspective of an embodiment of a sound-emitting unit provided by the present invention;

[0052] Figure 7 A schematic structural diagram of an embodiment of a diaphragm and a housing provided by the present invention;

[0053] Figure 8 A schematic cross-sectional view of an embodiment of a reinforcement part and a reinforcement part bracket provided by the present invention;

[0054] Fig. 9 A structural schematic diagram of an embodiment of a reinforcement part and a reinforcement part bracket provided by the present invention;

[0055] Fig.10 A schematic structural diagram of another embodiment of a reinforcing part and a reinforcing part bracket provided by the present invention;

[0056] Fig.11 A schematic structural diagram of an embodiment of a magnet assembly and a flat voice coil provided by the present invention;

[0057] Fig.12 A schematic diagram of magnetic force line distribution of an embodiment of a magnet assembly and a flat voice coil provided by the present invention;

[0058] Fig.13 A schematic structural diagram of an embodiment of a centering support plate and a housing provided by the present invention;

[0059] Fig.14 A schematic structural diagram of an embodiment of a support plate provided by the present invention;

[0060] Fig.15 A structural schematic diagram of an embodiment of the reinforcement portion provided by the present invention provided with reinforcement ribs;

[0061] Fig.16 A schematic structural diagram of another embodiment of a sound-emitting unit provided by the present invention;

[0062] Fig.17 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] Fig.18 A schematic structural diagram of an embodiment of a front cover provided by the present invention;

[0064] Fig.19A schematic structural diagram of another embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0065] Fig. 20 A schematic structural diagram of another embodiment of the front cover provided by the present invention;

[0066] Fig.21 A schematic structural diagram of another embodiment of the front cover provided by the present invention;

[0067] Fig. 22 A schematic structural diagram of another embodiment of the front cover provided by the present invention having a first hole and a second hole;

[0068] Fig.23 It is a structural schematic diagram of an embodiment of the present invention in which a sound-emitting unit is arranged in a housing.

[0069] Description of Figure Numbers:

[0070] 100, sound-generating 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 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; 3, vibration system; 31, diaphragm; 311, folding ring; 312, reinforcement; 3121, annular positioning part; 3122, positioning groove; 313, reinforcement ribs; 314, microholes; 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 part; 53, second connecting part; 54, third connecting part; 6, reinforcing bracket; 61, cavity; 62, opening; 63, connecting hole; 64 , reinforcing bending part; 7, waterproof breathable membrane; 8, centering support piece; 81, first fixing part; 82, second fixing part; 83, elastic arm part; 84, glue injection hole; 85, first pad; 9, conductive connecting part; 91, main body; 92, external connecting part; 921, external pad; 10, pressing plate; 20, front cover; 201, mesh; 2011, first hole; 2012, second hole; 30, dustproof net; 40, covering 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 described embodiments 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 creative work are 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 indication 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. 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 contradictory or cannot be implemented, it should be deemed that such 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 how to improve the acoustic performance of the speaker.

[0078] See also Figure 1 , Figure 2 , Fig.11 and Fig.12As shown, in one embodiment of the present invention, the aspect ratio of the sound unit 100 is greater than 2:1, and the sound unit 100 includes a shell 1, a magnetic circuit system 2 and a vibration system 3. The magnetic circuit system 2 includes a support plate 21 and two magnet assemblies 22 arranged alternately on the support plate 21, and a magnetic gap 224 is formed between the two magnet assemblies 22. The support plate 21 is made of non-magnetic material. Each magnet assembly 22 includes a first magnet 221, a second magnet 222 and a third magnet 223 arranged in sequence along a first direction. The third magnet 223 is connected to the support plate 21. The first magnet 221 and the third magnet 223 are both magnetized along the second direction and the magnetization directions are opposite, and the first direction and the second direction are perpendicular; the second magnet 222 is magnetized along the first direction. magnet, 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 each magnet assembly 22 can 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; the vibration system 3 includes a diaphragm 31 and a flat voice coil 32 for driving the diaphragm 31 to vibrate along a first direction, the diaphragm 31 includes a folded ring 311 and a reinforcement part 312 arranged in the central area of ​​the folded ring 311, the folded ring 311 is connected to the shell 1, the flat voice coil 32 is connected to the reinforcement part 312 and is located in the magnetic gap 224, and the axial direction of the flat voice coil 32 is arranged along the second direction.

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

[0080] The technical solution of the present invention is to set two magnet assemblies 22 at intervals, each magnet assembly 22 is stacked along the first direction using a first magnet 221, a second magnet 222 and a third magnet 223, 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 each magnet assembly 22 can 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, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker.

[0081] The first direction is Figure 1 The up and down directions shown, the second direction is Figure 1In the left and right directions shown, 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 each magnet assembly 22 forms a magnetic field enhancement side toward the magnetic gap 224, and the two magnet assemblies 22 can form a complete magnetic field line closed loop, thereby improving the magnetic field strength and the acoustic performance of the speaker. It should be noted that the support plate 21 is made of non-magnetic material in order to allow more magnetic lines to pass through the flat voice coil 32 to avoid dispersion of magnetic lines.

[0082] In this embodiment, the shape of the sound unit 100 is narrow and long. The sound unit 100 has a height (thickness) along a first direction, and a length and width along a direction perpendicular to the first direction. The ratio of the length to the width of the sound unit 100 is greater than 2:1, which can better fit the reserved space of the microelectronic device.

[0083] 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 Front-to-back orientation shown.

[0084] It should also be noted that when the flat voice coil 32 is powered, the flat voice coil 32 reciprocates in the magnetic gap 224 to cut the magnetic lines of force, driving the diaphragm 31 to vibrate up and down, thereby instigating the air to make sounds and completing the energy conversion between electricity and sound. The flat voice coil 32 can be directly connected to the diaphragm 31, or the flat voice coil 32 can be connected to the diaphragm 31 through other structural parts such as a connecting frame.

[0085] According to an embodiment of the present invention, the first magnet 221 can be a bar magnet or a plurality of segmented magnets; the second magnet 222 can be a bar magnet or a plurality of segmented magnets; the third magnet 223 can be a bar magnet or a plurality of segmented magnets.

[0086] In this embodiment, the first magnet 221, the second magnet 222 and the third magnet 223 are connected in sequence, making the entire magnetic circuit system 2 more compact and reducing the space occupied by the magnetic circuit system 2. Further, by setting the third magnet 223 on the support plate 21, the connection between the magnet assembly 22 and the support plate 21 is achieved. Further, the first magnet 221 can be connected to the housing 1 to achieve the connection and fixation of the magnet assembly 22 and the housing 1.

[0087] See also Figure 3 , Figure 5 and Figure 6As shown, in one embodiment, the sound-generating unit 100 further includes a waterproof sealing ring 4, which is arranged around the folding ring 311; the waterproof sealing ring 4, the folding ring 311, the reinforcement part 312 and the housing 1 are integrally injection molded, and the waterproof performance of the sound-generating unit 100 is improved by arranging the waterproof sealing ring 4. By integrally injection molding the waterproof sealing ring 4, the folding ring 311, the reinforcement part 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. It should be noted that the height of the diaphragm 31 is lower than the waterproof sealing ring 4, so that there is 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, the vibration gap 33 provides a larger vibration space for the diaphragm 31, thereby reducing the probability of interference between the diaphragm 31 and the housing 200.

[0088] See also Figure 3 and Figure 4 As shown, in one embodiment, 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 good 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 .

[0089] See also Figure 2 , Figure 5 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.

[0090] In one embodiment, the reinforcing portion 312 has a support portion that bends and extends along the first direction, and the support portion is connected to the flat voice coil 32; the support portion is provided to connect the flat voice coil 32, thereby replacing the connection of the original bracket 5, eliminating the bracket 5 as a structural member, reducing the installation process of the bracket 5, and reducing the production cost of the sound unit 100. It should be noted that the reinforcing portion 312 can be a polymer material, such as polyphthalamide, polyphthalamide plus 35% glass fiber material, or carbon fiber, metal alloy and other materials.

[0091] See also Figures 8 to 10As shown, in one embodiment, the vibration system 3 also 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. The ratio of the height of the reinforcing bend 64 along the first direction to the width of the reinforcing portion 312 along the second direction is greater than 1:4. This setting can make the split vibration frequency of the reinforcing portion 312 located after 10kHz. The ratio of the height of the reinforcing bend 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. This setting can make the split vibration frequency of the reinforcing portion 312 located between 4kHz and 10kHz. It should be noted that the height of the reinforcing bend 64 along the first direction is Figure 8 In a, the width of the reinforcement portion 312 along the second direction is Figure 8 Middle b.

[0092] See also Fig. 9 As shown, according to one embodiment of the present invention, the reinforcing bracket 6 is hollow to form a cavity 61, and at least one of the two ends of the reinforcing bracket 6 is provided with an opening 62 connected to the cavity 61, and the cavity 61 is connected to the micropores 314 on the reinforcing part 312 to balance the internal and external air pressures of the sound unit 100.

[0093] See also Fig.10 As shown, according to another embodiment of the present invention, the reinforcing bracket 6 is hollow to form a cavity 61, and the cavity 61 is connected to the micropores 314 on the reinforcing portion 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.

[0094] See also Figure 7 As shown, in one embodiment, the reinforcement part 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 part 312, it is beneficial to balance the air pressure inside and outside the sound unit 100, and by providing the waterproof breathable membrane 7 covering the micropores 314, the waterproof performance of the sound unit 100 is effectively improved while ensuring the balance of the air pressure inside and outside the sound unit 100.

[0095] In one embodiment, at least part of the reinforcing portion 312 is made of breathable material, and the sound-emitting unit 100 further includes a waterproof breathable membrane 7 covering the breathable material; at least part of the reinforcing portion 312 is made of breathable material, which is beneficial to the balance of the internal and external air pressure of the sound-emitting unit 100. By setting the waterproof breathable membrane 7 covering the breathable material, the waterproof performance of the sound-emitting unit 100 is effectively improved while ensuring the balance of the internal and external air pressure of the sound-emitting unit 100. It should be noted that the breathable material can be organic aerogel, or foam metal, etc.

[0096] See also Fig.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 housing 1. The reinforcement rib 313 is provided to strengthen the structure of the reinforcement portion 312, so that the resonance of the reinforcement portion 312 can be effectively moved to a high frequency.

[0097] See also Figure 1 and Figure 3 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 side wall 12 is provided with a first through hole 121, and 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 side wall 12, each 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 further improving the acoustic performance of the sound unit 100. It should be noted that the first through hole 121 passes through two side walls 12 arranged opposite to each other along the second direction, and the two outer walls of each magnet assembly 22 arranged opposite to each other along the second direction both extend outward to form the first protrusion 225, and the two first protrusions 225 are respectively located in the two first through holes 121.

[0098] See also Figure 3 and Fig.11 As shown, in one embodiment, one side of the first magnet 221 close to the magnetic gap 224 protrudes along the first direction toward the direction away from the support plate 21 to form a second protrusion 2211, and the housing 1 is provided with a second through hole 13 for avoiding the second protrusion 2211, and the second through hole 13 is connected to the magnetic gap 224. By providing the second protrusion 2211, the size of the first magnet 221 is enlarged, and the magnetic field area of ​​the flat voice coil 32 is further expanded, so that the driving force factor of the flat voice coil 32 can be symmetrical relative to the static equilibrium position.

[0099] See also Figure 1 , Figure 2 and Figure 6As shown, in one embodiment, the sound unit 100 further includes a centering support 8, and the centering support 8 includes a first fixing portion 81, an elastic arm portion 83, and a second fixing portion 82. The first fixing portion 81 is provided on the housing 1, and the second fixing portion 82 is connected to the flat voice coil 32. The two ends of the elastic arm portion 83 are respectively connected to the first fixing portion 81 and the second fixing portion 82, and the magnet assemblies 22 all have an escape space for avoiding the centering support 8. By providing the centering support 8, 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, an installation space for the centering support 8 is formed between the magnet assemblies 22.

[0100] In one embodiment, the centering support 8 includes two centering support pieces 8, which are respectively arranged at both ends of the long side direction of the housing 1, and the two centering support pieces 8 are connected by a conductive connection part 9, and the conductive connection part 9 is also provided with an external pad 921 that can be electrically connected to an external circuit. By arranging the conductive connection part 9 along the long side direction of the housing 1, the two centering support pieces 8 can be electrically conductive, so that it is convenient to introduce the external circuit current into the flat voice coil 32.

[0101] See also Figure 2 and Fig.14 As shown, in one embodiment, the shell 1 includes an annular body 11 and a side wall 12 connected to the annular body 11, the support plate 21 includes a bottom plate 212 and a surrounding plate 213, the magnet assembly 22 is arranged on the bottom plate 212, the surrounding plate 213 is connected to the side wall 12, and the first fixing portion 81 is clamped between the surrounding plate 213 and the side wall 12; wherein the first fixing portion 81 is clamped between the surrounding plate 213 and the side wall 12, thereby effectively fixing the first fixing portion 81, thereby improving the vibration stability of the flat voice coil 32.

[0102] See also Figure 2 and Fig.13 As 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.

[0103] See also Figure 2 and Fig.13 As shown, in one embodiment, the first fixing portion 81 is provided with a first solder pad 85, and the shell 1 is provided with a second solder pad 17 welded to the first solder pad 85 corresponding to the first solder pad 85; by welding the first solder pad 85 and the second solder pad 17, the reliability of the connection between the first fixing portion 81 and the shell 1 is improved.

[0104] See also Figure 2 and Figure 6As shown, in one embodiment, the vibration system 3 further includes a bracket 5, the bracket 5 includes a main body 51 extending in a first direction, a first connecting portion 52 and a second connecting portion 53 located at both ends of the main body 51 in 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 reinforcing 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. Through this arrangement, the bracket 5 is simultaneously connected to the diaphragm 31, the flat voice coil 32 and the centering support 8, thereby simplifying the connection method of each component of the vibration system 3, saving the arrangement of parts, thereby reducing the space occupied by the sound unit 100, and improving the sound performance of the sound unit 100. It should be noted that there are two brackets 5, and the two brackets 5 are arranged at both ends of the flat voice coil 32 along the third direction, thereby effectively reducing the probability of polarization of the flat voice coil 32.

[0105] See also Figure 2 , Fig. 9 and Fig.10 As shown, according to an embodiment of the present invention, a ring-shaped positioning portion 3121 is provided on one side of the reinforcement portion 312 facing the magnet assembly 22, a positioning groove 3122 is formed in the middle of the ring-shaped positioning portion 3121, and the first connecting portion 52 extends into the first positioning groove 3122 and is connected to the reinforcement portion 312; the annular positioning portion 3121 is provided to facilitate the assembly of the bracket 5. The number of the annular positioning portions 3121 is consistent with the number of the brackets 5 and is provided one-to-one.

[0106] In one embodiment, the conductive connecting portion 9 and the centering support plate 8 are integrally formed. The conductive connecting portion 9 and the centering support plate 8 are integrally formed to reduce the number of parts that need to be assembled and omit assembly steps, which not only improves the assembly efficiency of the sound unit 100 but also avoids assembly errors.

[0107] In one embodiment, the conductive connecting portion 9 includes a main body 91 connecting two centering support plates 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 arranged on the side of the magnetic circuit system 2, and the outer surface of the main body 91 does not exceed the outer surface of the shell 1; the outer surface of the main body 91 does not exceed the outer surface of the shell 1, thereby avoiding the phenomenon that the overall size of the sound unit 100 increases due to the protrusion of the main body 91 and the risk of interference between the main body 91 and other components of the electronic device.

[0108] See also Figure 2 and Figure 3As shown, in one embodiment, the conductive connection part 9 includes a main body 91 connecting two centering support plates 8 and an external connection part 92 connected to one end of the main body 91, the external connection part 92 is provided with an external solder pad 921, the main body 91 is arranged on the side of the magnetic circuit system 2, and the sound-emitting monomer 100 also includes a pressing plate 10, the pressing plate 10 is connected to the shell 1, the main body 91 is arranged between the third magnet 223 and the pressing plate 10, and the outer surface of the pressing plate 10 does not exceed the outer surface of the shell 1. The pressing plate 10 is provided to prevent the main body 91 from tilting and interfering with other parts. The outer surface of the pressing plate 10 does not exceed the outer surface of the shell 1 to avoid the phenomenon that the pressing plate 10 protrudes from the outer surface of the shell 1 and causes the overall size of the sound-emitting monomer 100 to increase, and to avoid the pressing plate 10 protruding from the outer surface of the shell 1 and interfering with other parts. It should be noted that the pressing plate 10 is provided with a rivet hole, which can be fixedly connected with the hot melt rivet column provided on the shell 1.

[0109] See also Figure 2 , Figure 3 and Fig.17 As shown, in one embodiment, the sound-emitting unit 100 further includes a front cover 20, which is arranged on the side of the diaphragm 31 away from the magnetic circuit system 2, and a mesh 201 is provided on the front cover 20. The sound-emitting 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 the sound-emitting unit 100 failing due to a sharp object piercing the diaphragm 31 can be effectively reduced. The purpose of providing the dustproof net 30 to cover the mesh 201 is to prevent external dust from falling on the diaphragm 31 through the mesh 201 and affecting the acoustic performance of the sound-emitting 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.

[0110] See also Figure 2 and Figure 3 As shown, in one embodiment, the sound unit 100 also includes a waterproof sealing ring 4, which 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 folding ring 311 and forms an annular step 43 at the connection with the folding ring 311. The front cover 20 is arranged on the annular step 43 and is located on the inner side of the waterproof sealing ring 4; the front cover 20 is reliably supported by forming the annular step 43, and the front cover 20 is placed on the annular step 43, so that the front cover 20 will not increase the size of the entire sound unit 100 due to the protrusion of the waterproof sealing ring 4. The front cover 20 is arranged on the annular step 43 and is located on the inner side of the waterproof sealing ring 4, which effectively reduces the size of the sound unit 100, so that the sound unit 100 can better adapt to the needs of a narrow installation environment.

[0111] See also Figures 17 to 22As shown, in one embodiment, the mesh 201 is of irregular shape; the amplitude symmetry of the sound unit 100 can be adjusted by adjusting the shape of the mesh 201 .

[0112] 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 hole 2011 and the second hole 2012 are arranged alternately along the long side or the short side of the sound unit 100, or the first hole 2011 is scattered between the second holes 2012, or the front cover 20 includes a first area corresponding to the first hole 2011 and a second area corresponding to the second hole 2012. By changing the arrangement of the first hole 2011 and the second hole 2012, the amplitude symmetry of the sound unit 100 can also be effectively adjusted.

[0113] See also Figure 3 and Fig.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 which are arranged in sequence along a first direction, the first long axis segment 321 is connected to the diaphragm 31, the first long axis segment 321 and the second long axis segment 322 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 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.

[0114] 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.

[0115] 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, increases the driving force of the flat voice coil 32, and enhances the acoustic performance of the sound unit 100.

[0116] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil 32 is not greater than 20:1; the aspect ratio of the inner diameter of the flat voice coil 32 is controlled to be less than or equal to 20:1 in order 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 ring of the flat voice coil 32 along the third direction to the width dimension of the inner ring of the flat voice coil 32 along the first direction.

[0117] In one embodiment, the length-to-width ratio of the sound unit 100 is not greater than 10:1, so as to better adapt to the installation requirements of some existing narrow installation environments.

[0118] See also Fig.16 and Fig.23 As shown, in one embodiment, 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, and the outer surface of 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 close to the diaphragm 31 protrudes toward the side away from the flat voice coil 32, wherein the central portion 14 protrudes toward the side away from the flat voice coil 32 in order to better match the shape of the housing 200 of the electronic device, so that the housing 1 can extend along the housing 200, and the housing 1 and the housing 200 are sealed and abutted; the central portion 14 protrudes toward the side away from the flat voice coil 32, so that the housing 1 is in a curved shape or a nearly curved shape to match 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 matching the shape of the housing 1 with that of the outer shell 200, part of the gap is used as the vibration space of the diaphragm 31, thereby increasing the vibration space of the diaphragm 31 without increasing the installation space of the sound unit 100, and increasing the volume of the front sound cavity 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 arc-shaped structure as a whole, or the center portion 14 can be a flat portion, and the end portion 15 can be a flat portion or a curved portion, or the center portion 14 can be a curved portion, and the end portion 15 can be a flat portion or a curved portion.

[0119] See also Figure 2 and Figure 3 As shown, in one embodiment, the support plate 21 is provided with an avoidance groove corresponding to the magnetic gap 224 for avoiding the flat voice coil 32; wherein the avoidance groove is connected to the magnetic gap 224, and the flat voice coil 32 is provided with a larger vibration space by setting the avoidance groove.

[0120] In one embodiment, the support plate 21 is provided with a avoidance hole 211 corresponding to the magnetic gap 224 for avoiding the flat voice coil 32, and the sound unit 100 further includes a cover 40 covering the avoidance hole 211, and the cover 40 is arranged on the side of the support plate 21 away from the magnet assembly 22 along the first direction; by providing the avoidance hole 211, a larger vibration space is provided for the flat voice coil 32; by providing the cover 40 covering the avoidance hole 211, the amplitude symmetry of the sound unit 100 is adjusted. It should be noted that the cover 40 can be a cover plate or a nylon mesh.

[0121] See also Fig.14As shown, in one embodiment, the support plate 21 includes a bottom plate 212, a surrounding plate 213 disposed at the periphery of the bottom 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 at intervals along the third direction, and the second mounting ear 215 is provided with a second mounting hole 2151 and a second positioning hole 2152 at intervals along the third direction. The second positioning hole 2152 extends through the outer edge of the second mounting ear 215 along the third direction, and 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 unit 100, and the first positioning hole 2142 and the second positioning hole 2152 are provided to facilitate the accurate positioning of the sound unit 100, thereby preventing the sound unit 100 from being deflected during the process of being assembled to the housing 200.

[0122] See also Fig.23 As shown, the present invention further proposes an electronic device, the electronic device comprises a housing 200 and the above-mentioned sound-emitting unit 100, and the sound-emitting unit 100 is arranged in the housing 200. The electronic device can be a computer, a mobile phone, a smart wearable device, etc. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0123] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied 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 length-to-width ratio of the sound-emitting monomer is greater than 2:1, and the sound-emitting monomer comprises: case; A magnetic circuit system, the magnetic circuit system comprises a support plate and two magnet assemblies arranged alternately on the support plate, a magnetic gap is formed between the two magnet assemblies, the support plate is made of non-magnetic material, each of the magnet assemblies comprises a first magnet, a second magnet and a third magnet arranged in sequence along a first direction, the third magnet is arranged on the support plate, the first magnet and the third magnet are magnetized along a second direction and in opposite directions, and the first direction is perpendicular to the second direction; 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, so that each of the magnet assemblies can form a magnetic field enhancement side facing the magnetic gap, and the polarities of the magnetic poles of the two first magnets close to the magnetic gap are opposite; A vibration system, the vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along the first direction, the diaphragm comprising a folding ring and a reinforcement portion arranged in the central area of ​​the folding ring, the folding ring is connected to the shell, the flat voice coil is connected to the reinforcement portion and is located in the magnetic gap, and the axial direction of the flat voice coil is arranged along the second direction.

2. The sound-emitting unit according to claim 1, characterized in that: The sound-generating unit further comprises a waterproof sealing ring, which is arranged around the folding ring; The waterproof sealing ring, the folding ring, the reinforcing part and the housing are integrally injection-molded. Alternatively, the outer side wall of the waterproof sealing ring has a first inclined surface inclined inwardly, and the inner side wall of the waterproof sealing ring has a second inclined surface inclined outwardly, and the angle between the first inclined surface and the first direction is greater than the angle between the second inclined surface and the first direction.

3. The sound-emitting unit according to claim 1, characterized in that: The vibration system further comprises a bracket, and the reinforcement part and the flat voice coil are both connected to the bracket; Alternatively, the reinforcement portion has a support portion that bends and extends along the first direction, and the support portion is connected to the flat voice coil; And / or, the vibration system also includes a reinforcing bracket, which is arranged on the side of the reinforcing portion facing the flat voice coil, and the reinforcing bracket is bent along the first direction toward the flat voice coil to form a reinforcing bent portion; the ratio of the height of the reinforcing bent portion along the first direction to the width of the reinforcing portion along the second direction is greater than 1:4; or, the ratio of the height of the reinforcing bent portion along the first direction to the width of the reinforcing portion along the second direction is not less than 1:10 and not greater than 1:

4.

4. The sound-emitting unit according to claim 1, characterized in that: The reinforcing part 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 part of the structure of the reinforcement part is a breathable material, and the sound-emitting unit further includes 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.

5. The sound-emitting unit according to claim 1, characterized in that: The housing comprises an annular body and a side wall 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; And / or, one side of the first magnet close to the magnetic gap protrudes along the first direction away from the support plate to form a second protrusion, and the shell is provided with a second through hole for avoiding the second protrusion, and the second through hole is connected to the magnetic gap.

6. The sound-emitting unit according to claim 1, characterized in that: The sound unit also includes a centering support plate, which includes a first fixing portion, an elastic arm portion and a second fixing portion, wherein 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.

7. The sound-emitting unit according to claim 6, 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.

8. The sound-emitting unit according to claim 6, characterized in that: The shell includes an annular body and a side wall connected to the annular body, the support plate includes a bottom plate and a surrounding plate, the magnet assembly is arranged on the bottom plate, the surrounding plate is connected to the side wall, and the first fixing portion is sandwiched between the surrounding plate and the side wall; And / or, the first fixing portion is provided with a glue injection hole, the housing is provided with a glue injection groove corresponding to the glue injection hole and connected with the glue injection hole, and the glue injection hole and the glue injection groove are used to contain glue; And / or, the first fixing portion is provided with a first soldering pad, and the housing is provided with a second soldering pad corresponding to the first soldering pad and soldered to the first soldering pad; And / or, the vibration system also includes a bracket, which includes a main body extending along a first direction, a first connecting part and a second connecting part located at both ends of the main body along the first direction and bent along a second direction, and a third connecting part extending from the inner end of the main body along the first direction, the first connecting part is connected to the reinforcement part, the second connecting part is connected to the second fixing part, and the third connecting part is connected to the side of the flat voice coil.

9. The sound-emitting unit according to claim 7, characterized in that: The conductive connection portion and the centering support piece are integrally formed parts; 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 welding pad, the main body part is arranged on the side of the magnetic circuit system, and the outer surface of the main body part does not exceed the outer surface of the shell; 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 arranged on the side of the magnetic circuit system, the sound unit also includes a pressure plate, the pressure plate is connected to the shell, the main body is arranged between the third magnet and the pressure plate, and the outer surface of the pressure plate does not exceed the outer surface of the shell.

10. The sound-emitting unit according to claim 1, 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, and has mesh holes. The sound-emitting unit further includes a dust-proof net, which covers the mesh holes.

11. The sound-emitting unit according to claim 10, characterized in that: The sound-generating unit further includes a waterproof sealing ring, which is connected to a side of the housing away from the magnetic circuit system, and is arranged around the folding ring and forms an annular step at the connection with the folding ring, and the front cover is arranged on the annular step and located on the inner side of the waterproof sealing ring; And / or, the mesh is of irregular shape; And / or, the mesh includes a first hole and a second hole, and the first hole and the second hole have different hole areas; The first holes and the second holes are alternately arranged along the long side or the short side of the sound unit, or the first holes are interspersed between the second holes, or the front cover includes a first area corresponding to the first holes and a second area corresponding to the second holes.

12. The sound-emitting unit according to any one of claims 1 to 11, characterized in that: The flat voice coil comprises 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, 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 eighty 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.

13. The sound-emitting unit according to any one of claims 1 to 11, 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-emitting 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 long side direction of the housing, and an outer surface of the central portion protrudes toward a side away from the flat voice coil.

14. The sound-emitting unit according to any one of claims 1 to 11, characterized in that: The support plate is provided with an avoidance groove corresponding to the magnetic gap for avoiding the flat voice coil; Or, 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 along the first direction; And / or, the support plate includes a base plate, a surrounding plate arranged on the periphery of the base plate, and a first mounting ear and a second mounting ear arranged 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, and the first direction, the second direction and the third direction are perpendicular to each other.

15. An electronic device, characterized in that: The electronic device comprises a housing and a sound-emitting unit as claimed in any one of claims 1 to 14, wherein the sound-emitting unit is arranged in the housing.

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