Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production monomer and electronic equipment, the sound production monomer comprises a magnetic circuit system, a vibration system and a shell, the magnetic circuit system comprises a magnetic conductive yoke and a magnet assembly arranged on the magnetic conductive yoke, the magnet assembly forms a magnetic gap, and the magnet assembly comprises a first magnet, a second magnet, a third magnet and a fourth magnet, the first magnet and the third magnet are magnetized in the second direction, the magnetizing directions are opposite, the second magnet and the fourth magnet are magnetized in the first direction, the first direction is perpendicular to the second 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. The polarity of the fourth magnet towards the third magnet is the same as that of the third magnet close to one side of the magnetic gap, so that the magnet assembly forms a magnetic field enhancement side towards the magnetic gap; the vibration system comprises a vibrating diaphragm and a flat voice coil. The magnet assembly forms 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] A magnetic circuit system, the magnetic circuit system comprises a magnetic yoke and two magnet assemblies arranged at intervals on the magnetic yoke, a magnetic gap is formed between the two magnet assemblies, each of the magnet assemblies comprises a first magnet, a second magnet, a third magnet and a fourth magnet arranged in sequence along a first direction, the fourth magnet is arranged on the magnetic yoke, the first magnet and the third magnet are magnetized along a second direction and in opposite directions, the first direction is perpendicular to the second direction, the second magnet and the fourth magnet are magnetized along the first direction, the polarity of the magnetic pole of the second magnet facing the first magnet is the same as the polarity of the magnetic pole of the first magnet close to the magnetic gap, the polarity of the magnetic pole of the fourth magnet facing the third magnet is the same as the polarity of the magnetic pole of the third magnet close to the magnetic gap, so that 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;

[0006] 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 flat voice coil being connected to the diaphragm and being located in the magnetic gap, and the axial direction of the flat voice coil being arranged along the second direction;

[0007] The diaphragm is connected to the shell, the shell has a central portion and end portions located at both ends of the central portion along the long side direction of the shell, and the central portion protrudes toward a side away from the flat voice coil.

[0008] In one embodiment, the diaphragm includes a fold and a reinforcement portion provided in a central area of ​​the fold, and the fold is connected to the housing;

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

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

[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] And / or, the reinforcement portion has a support portion that is bent and extended along the first direction, and the support portion is connected to the flat voice coil.

[0013] 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;

[0014] And / or, at least a 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;

[0015] 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.

[0016] 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.

[0017] 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;

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

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

[0020] 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.

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

[0022] The side wall is provided with a first through hole, and the magnet assembly has a first protrusion extending into the first through hole.

[0023] In one embodiment, the sound unit also includes a centering support plate, and the centering support plate 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, the two ends of the elastic arm portion are respectively connected to the first fixing portion and the second fixing portion, and the magnet assembly has an avoidance space to avoid the centering support plate.

[0024] 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.

[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 housing includes an annular body and a side wall connected to the annular body, the magnetic yoke includes a bottom plate and a surrounding plate, the magnet assembly is provided 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;

[0029] 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;

[0030] 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.

[0031] In one embodiment, the flat voice coil includes a first long axis segment and a second long axis segment sequentially arranged at intervals 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;

[0032] 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;

[0033] 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;

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

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

[0036] In one embodiment, the aspect ratio of the inner diameter of the flat voice coil is no greater than 20:1;

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

[0038] In one embodiment, the magnetic yoke includes a base plate, a surrounding plate 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 along the third direction and passes through the outer edge of the second mounting ear, and the first direction, the second direction and the third direction are perpendicular to each other.

[0039] 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.

[0040] 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, a third magnet and a fourth magnet, the first magnet and the third magnet are magnetized along the second direction and the magnetization directions are opposite, the first direction is perpendicular to the second direction, the second magnet and the fourth magnet are magnetized along the first direction, the polarity of the magnetic pole of the second magnet facing the first magnet is the same as the polarity of the magnetic pole of the first magnet close to the magnetic gap, the polarity of the magnetic pole of the fourth magnet facing the third magnet is the same as the polarity of the magnetic pole of the third magnet close to the magnetic gap, so that each magnet assembly can form a magnetic field enhancement side facing the magnetic gap, and the polarity of the magnetic poles of the two first magnets close to the magnetic gap is opposite, so that the magnetic lines of force of the two magnet assemblies form a ring state, thereby enhancing the magnetic field driving force and improving the acoustic performance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

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

[0043] Figure 2 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

[0044] Figure 3 A schematic cross-sectional view of an embodiment of a sound-emitting unit provided by the present invention;

[0045] Figure 4 A schematic cross-sectional view of a portion of the structure of an embodiment of a sound-emitting unit provided by the present invention;

[0046] Figure 5 A schematic diagram of the magnetic flux distribution of an embodiment of a sound-emitting unit provided by the present invention;

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

[0048] Figure 7 A schematic structural diagram of an embodiment of a diaphragm provided by the present invention;

[0049] Figure 8 A schematic structural diagram of an embodiment of a magnetically conductive yoke provided by the present invention;

[0050] Fig. 9A schematic diagram of the exploded structure of a centering support plate and a housing according to an embodiment of the present invention;

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

[0052] Fig.11 A schematic structural diagram of an embodiment of a front cover provided by the present invention;

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

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

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

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

[0057] Fig.16 It is a structural schematic diagram of an embodiment of the present invention in which a sound-emitting unit is arranged in a housing.

[0058] Description of Figure Numbers:

[0059] 100, sound-generating unit; 1, shell; 11, annular body; 12, side wall; 121, first through hole; 14, center; 15, end; 16, glue injection groove; 17, second pad; 2, magnetic circuit system; 21, magnetic yoke; 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; 222, second magnet; 223, third magnet; 224, magnetic gap; 225, first protrusion; 226, fourth magnet Iron; 3. Vibration system; 31. Diaphragm; 311. Folding ring; 312. Reinforcement part; 313. Reinforcement rib; 314. Micro hole; 315. Support part; 32. Flat voice coil; 321. First long axis section; 322. Second long axis section; 33. Vibration gap; 4. Waterproof sealing ring; 41. Annular step; 5. Centering support plate; 51. First fixing part; 52. Second fixing part; 53. Elastic arm part; 54. Glue injection hole; 55. First solder pad; 6. Conductive connection part; 61. Main body; 62. External connection part; 621. External solder pad; 7. Front cover; 71. Mesh; 711. First hole; 712. Second hole; 8. Dustproof net;

[0060] 200. Shell.

[0061] 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

[0062] 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.

[0063] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] See also Figure 1 , Figure 3 and Figure 5As shown, in one embodiment of the present invention, the aspect ratio of the sound-generating unit 100 is greater than 2:1, and the sound-generating unit 100 includes a magnetic circuit system 2, a vibration system 3 and a shell 1, the magnetic circuit system 2 includes a magnetic yoke 21 and two magnet assemblies 22 arranged alternately on the magnetic yoke 21, and a magnetic gap 224 is formed between the two magnet assemblies 22, each magnet assembly 22 includes a first magnet 221, a second magnet 222, a third magnet 223 and a fourth magnet 226 arranged in sequence along a first direction, the fourth magnet 226 is arranged on the magnetic yoke 21, the first magnet 221 and the third magnet 223 are 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 magnetized along the first direction, and the second magnet 222 faces the first magnet The polarity of the magnetic pole 221 is the same as the polarity of the magnetic pole of the first magnet 221 close to the magnetic gap 224, and the polarity of the magnetic pole of the fourth magnet 226 toward 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 each magnet assembly 22 can form a magnetic field enhancement side facing the magnetic gap 224; the vibration system 3 includes a diaphragm 31 and a flat voice coil 32 for driving the diaphragm 31 to vibrate along a first direction, the flat voice coil 32 is connected to the diaphragm 31 and is located in the magnetic gap 224, and the axial direction of the flat voice coil 32 is set along the second direction; the diaphragm 31 is connected to the shell 1, and the shell 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 shell 1, and the central portion 14 protrudes to the side away from the flat voice coil 32.

[0068] 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.

[0069] 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 the first magnet 221, the second magnet 222, the third magnet 223 and the fourth magnet 226, the first magnet 221 and the third magnet 223 are 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 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 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.

[0070] The first direction is Figure 1 The up and down directions shown, the second direction is Figure 1 In the left and right directions shown, taking the first magnet 221 magnetizing 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 each 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, and the polarities of the magnetic poles of the two third magnets 223 close to the magnetic gap 224 are opposite, so that the two magnet assemblies 22 can form a complete magnetic force line closed loop, thereby improving the magnetic field strength and the acoustic performance of the speaker. In addition, by setting the magnetic conductive yoke 21, the magnetic force lines of the fourth magnet 226 are corrected, so that more magnetic force lines can pass through the flat voice coil 32, thereby enhancing the induction strength of the flat voice coil 32, and thus improving the acoustic performance of the speaker.

[0071] In this embodiment, the shape of the sound unit 100 is narrow and long. It should be noted that the sound unit 100 has a height (thickness) along the first direction, and a length and width along the direction perpendicular to the first direction. The ratio of the length and width of the sound unit 100 is greater than 2:1, which can better adapt to the reserved space of the microelectronic device. In addition, the outer surface of the center portion 14 close to the diaphragm 31 protrudes toward the side away from the flat voice coil 32, wherein the center portion 14 protrudes toward the side away from the flat voice coil 32 in order to better adapt to 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 center portion 14 protrudes toward the side away from the flat voice coil 32, so that the housing 1 is curved or approximately curved to adapt to 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.

[0072] 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.

[0073] 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.

[0074] According to one 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; the fourth magnet 226 can be a bar magnet or a plurality of segmented magnets.

[0075] In this embodiment, the first magnet 221, the second magnet 222, the third magnet 223 and the fourth magnet 226 are connected in sequence, so that the entire magnetic circuit system 2 is more compact and the space occupied by the magnetic circuit system 2 is reduced. Further, by setting the fourth magnet 226 on the magnetic yoke 21, the connection between the magnet assembly 22 and the magnetic yoke 21 is realized. Further, the first magnet 221 can be connected to the housing 1 to realize the connection and fixation of the magnet assembly 22 and the housing 1.

[0076] See also Figure 3 and Figure 4 As shown, in one embodiment, the diaphragm 31 includes a folding ring 311 and a reinforcement portion 312 arranged in the central area of ​​the folding ring 311, and the folding ring 311 is connected to the shell 1; the folding ring 311, the reinforcement portion 312 and the shell 1 are integrally injection molded; by integrally injection molding the folding ring 311, the reinforcement portion 312 and the shell 1, the number of sealing surfaces is effectively reduced, thereby improving the waterproof performance of the sound unit 100.

[0077] In one embodiment, the sound-emitting unit 100 further includes a waterproof sealing ring 4, which is arranged around the folding ring 311, and the waterproof sealing ring 4, the folding ring 311, the reinforcement part 312 and the housing 1 are integrally injection molded. By integrally injecting 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-emitting 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.

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

[0079] See also Figure 3 As shown, in one embodiment, the reinforcing portion 312 has a supporting portion 315 that bends and extends along the first direction, and the supporting portion 315 is connected to the flat voice coil 32. By providing the supporting portion 315 to connect the flat voice coil 32, the connection of the original bracket is replaced, the bracket as a structural component is omitted, the installation process of the bracket is reduced, and the production cost of the sound unit 100 is reduced. 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.

[0080] See also Figure 6 As shown, in one embodiment, the reinforcement portion 312 is provided with a plurality of micropores 314, and the sound unit 100 also includes a waterproof breathable membrane 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 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.

[0081] 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 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 a waterproof breathable membrane 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.

[0082] See also Figure 7 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.

[0083] See also Figure 1 and Figure 2 As shown, in one embodiment, the sound-emitting unit 100 further includes a front cover 7, which is disposed on a side of the diaphragm 31 away from the magnetic circuit system 2, and a mesh hole 71 is provided on the front cover 7. The sound-emitting unit 100 further includes a dustproof net 8, and the dustproof net 8 covers the mesh hole 71. By providing the mesh hole 71 on the front cover 7, the probability of the sound-emitting unit 100 failing due to a sharp object piercing the diaphragm 31 can be effectively reduced. The dustproof net 8 is provided to cover the mesh hole 71 in order to prevent external dust from falling on the diaphragm 31 through the mesh hole 71 and affecting the acoustic performance of the sound-emitting unit 100. It should be noted that there are a plurality of mesh holes 71, and the shapes and sizes of the plurality of mesh holes 71 are not exactly the same, and the distribution of the plurality of mesh holes 71 can be adjusted as needed.

[0084] See also Figure 3 and Figure 4 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 41 at the connection with the folding ring 311. The front cover 7 is arranged on the annular step 41 and is located on the inner side of the waterproof sealing ring 4; the front cover 7 is reliably supported by forming the annular step 41, and the front cover 7 is placed on the annular step 41, so that the front cover 7 will not increase the size of the entire sound unit 100 due to the protrusion of the waterproof sealing ring 4. The front cover 7 is arranged on the annular step 41 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.

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

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

[0087] 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, and the side wall 12 is connected to the magnetic yoke 21 to form a housing cavity for accommodating the magnetic circuit system 2; the side wall 12 is provided with a first through hole 121, and the 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, the magnet assembly 22 can extend outward to form the first protrusion 225, thereby increasing the volume of the magnet assembly 22, improving the magnetic field strength, and further improving the acoustic performance of the sound unit 100. It should be noted that the first through hole 121 passes through the two side walls 12 arranged opposite to each other along the second direction, and the two outer walls of the 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.

[0088] According to an embodiment of the present invention, one side of the first magnet 221 close to the magnetic gap 224 protrudes along the first direction away from the magnetic yoke 21 to form a second protrusion, and the housing 1 is provided with a second through hole for avoiding the second protrusion, and the second through hole is connected to the magnetic gap 224. By providing the second protrusion, 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.

[0089] See also Figure 2 As shown, in one embodiment, the sound unit 100 further includes a centering support 5, and the centering support 5 includes a first fixing portion 51, an elastic arm portion 53, and a second fixing portion 52. The first fixing portion 51 is arranged on the housing 1, and the second fixing portion 52 is connected to the flat voice coil 32. The two ends of the elastic arm portion 53 are respectively connected to the first fixing portion 51 and the second fixing portion 52. The magnet assemblies 22 all have an escape space for avoiding the centering support 5. By providing the centering support 5, the probability of polarization of the flat voice coil 32 is reduced, and the vibration stability of the flat voice coil 32 is improved. In this embodiment, an installation space for the centering support 5 is formed between the magnet assemblies 22.

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

[0091] In one embodiment, the conductive connection part 6 and the centering support piece 5 are integrally formed parts; the conductive connection part 6 and the centering support piece 5 are integrally formed, thereby reducing the number of parts that need to be assembled, omitting the assembly steps, not only improving the assembly efficiency of the sound unit 100, but also avoiding assembly errors. In one embodiment, the conductive connection part 6 includes a main body 61 connecting the two centering support pieces 5 and an external connection part 62 connected to one end of the main body 61, the external connection part 62 is provided with an external solder pad 621, the main body 61 is arranged on the side of the magnetic circuit system 2, and the outer surface of the main body 61 does not exceed the outer surface of the shell 1; the outer surface of the main body 61 does not exceed the outer surface of the shell 1, thereby avoiding the phenomenon that the main body 61 protrudes and causes the overall size of the sound unit 100 to increase, and the risk of interference between the main body 61 and other parts of the electronic device.

[0092] In one embodiment, the conductive connection part 6 includes a main body 61 connecting two centering support plates 5 and an external connection part 62 connected to one end of the main body 61, the external connection part 62 is provided with an external solder pad 621, the main body 61 is provided on the side of the magnetic circuit system 2, and the sound-emitting unit 100 also includes a pressing plate, which is connected to the shell 1, and the main body 61 is provided between the third magnet 223 and the pressing plate, and the outer surface of the pressing plate does not exceed the outer surface of the shell 1. The pressing plate is provided to prevent the main body 61 from tilting up and interfering with other parts, and the outer surface of the pressing plate does not exceed the outer surface of the shell 1 to avoid the pressure plate protruding from the outer surface of the shell 1, which increases the overall size of the sound-emitting unit 100 and prevents the pressure plate from protruding from the outer surface of the shell 1 and interfering with other parts. It should be noted that the pressing plate is provided with a rivet hole, which can be fixedly connected with the hot melt rivet column provided on the shell 1.

[0093] In one embodiment, the shell 1 includes an annular body 11 and a side wall 12 connected to the annular body 11, the magnetic yoke 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 51 is clamped between the surrounding plate 213 and the side wall 12; wherein the first fixing portion 51 is clamped between the surrounding plate 213 and the side wall 12, thereby effectively fixing the first fixing portion 51, thereby improving the vibration stability of the flat voice coil 32.

[0094] See also Fig. 9 As shown, in one embodiment, the first fixing portion 51 is provided with a glue injection hole 54, and the shell 1 is provided with a glue injection groove 16 connected to the glue injection hole 54 corresponding to the glue injection hole 54, and the glue injection hole 54 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 54, so that the first fixing portion 51 is connected to the shell 1 through the solidified glue, thereby improving the reliability of the connection between the first fixing portion 51 and the shell 1.

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

[0096] See also Figure 3 and Figure 5 As shown, in one embodiment, the flat voice coil 32 includes a first long axis segment 321 and a second long axis segment 322 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.

[0097] 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.

[0098] In one embodiment, the thickness of the second magnet 222 along the first direction is greater than the thickness of the first magnet 221 and the third magnet 223 along the first direction; 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.

[0099] In one embodiment, the thickness of the fourth magnet 226 along the first direction is greater than the thickness of the first magnet 221 and the third magnet 223 along the first direction. This configuration increases the number of magnetic flux lines passing through the magnetic yoke 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 sound unit 100.

[0100] 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.

[0101] 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.

[0102] See also Figure 8 As shown, in one embodiment, the magnetic yoke 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.

[0103] See also Fig.16 The present invention further provides an electronic device, which includes a housing 200 and the above-mentioned sound-emitting unit 100, wherein the sound-emitting unit 100 is disposed in the housing 200. The electronic device may 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 at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0104] 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: A magnetic circuit system, the magnetic circuit system comprises a magnetic yoke and two magnet assemblies arranged at intervals on the magnetic yoke, a magnetic gap is formed between the two magnet assemblies, each of the magnet assemblies comprises a first magnet, a second magnet, a third magnet and a fourth magnet arranged in sequence along a first direction, the fourth magnet is arranged on the magnetic yoke, the first magnet and the third magnet are magnetized along a second direction and in opposite directions, the first direction is perpendicular to the second direction, the second magnet and the fourth magnet are magnetized along the first direction, the polarity of the magnetic pole of the second magnet facing the first magnet is the same as the polarity of the magnetic pole of the first magnet close to the magnetic gap, the polarity of the magnetic pole of the fourth magnet facing the third magnet is the same as the polarity of the magnetic pole of the third magnet close to the magnetic gap, so that 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 flat voice coil being connected to the diaphragm and being located in the magnetic gap, and the axial direction of the flat voice coil being arranged along the second direction; The diaphragm is connected to the shell, the shell has a central portion and end portions located at both ends of the central portion along the long side direction of the shell, and the central portion protrudes toward a side away from the flat voice coil.

2. The sound-emitting unit according to claim 1, characterized in that: The diaphragm includes a folding ring and a reinforcing portion arranged in the central area of ​​the folding ring, and the folding ring is connected to the shell; The folding ring, the reinforcing part and the shell are integrally injection-molded; or, the sound-emitting unit further includes a waterproof sealing ring, which is arranged around the folding ring, and the waterproof sealing ring, the folding ring, the reinforcing part and the shell are integrally injection-molded.

3. The sound-emitting unit according to claim 2, 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 reinforcing portion includes a supporting portion that bends and extends along the first direction, and the supporting portion is connected to the flat voice coil.

4. The sound-emitting unit according to claim 2, 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 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, and has mesh holes. The sound-emitting unit further includes a dust-proof net, which covers the mesh holes.

6. The sound-emitting unit according to claim 5, 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.

7. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The housing comprises an annular body and a side wall connected to the annular body, wherein the side wall is connected to the magnetic yoke to form a receiving cavity for receiving the magnetic circuit system; 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: 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.

9. The sound-emitting unit according to claim 8, 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.

10. The sound-emitting unit according to claim 9, 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.

11. The sound-emitting unit according to claim 8, characterized in that: The housing comprises an annular body and a side wall connected to the annular body, the magnetic yoke comprises 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.

12. The sound-emitting unit according to any one of claims 1 to 6, 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 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 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-emitting unit is not greater than 10:

1.

14. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The magnetic yoke includes a base plate, a surrounding plate arranged at 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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