Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production monomer and electronic equipment, and relates to the technical field of sound energy conversion, the sound production monomer comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system comprises a support plate, a center magnetic circuit and a side magnetic circuit, the support plate is made of a magnetic conductive material, and a magnetic gap is formed between the center magnetic circuit and the side magnetic circuit; the central magnetic circuit comprises a first magnet, a concentrating flux plate and a second magnet, the side magnetic circuit comprises a first side magnet, a middle side magnet and a second side magnet which are sequentially arranged in the first direction, and the side magnetic circuit can form a magnetic field enhancement side facing the magnetic gap; the vibration system comprises a vibrating diaphragm and an annular voice coil used for driving the vibrating diaphragm to vibrate in the first direction, one end of the annular voice coil is connected with the vibrating diaphragm, and the other end is located in the magnetic gap. The magnetizing directions of the magnets in the center magnetic circuit and the side magnetic circuits are designed, so that magnetic lines of force can be focused at the position of the magnetic conductive plate, the intensity of a magnetic field is greatly improved, a magnetic field enhancement side facing a magnetic gap is formed, and the acoustic performance of the loudspeaker is improved.

Description

Technical Field

[0001] The present 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, wherein the magnetic circuit system is connected to the shell, the magnetic circuit system comprises a support plate and a central magnetic circuit and a side magnetic circuit arranged on the support plate, the support plate is made of magnetic conductive material, the central magnetic circuit is spaced from the side magnetic circuit and a magnetic gap is formed therebetween, the central magnetic circuit comprises a first magnet, a magnetic conductive plate and a second magnet sequentially arranged along a first direction, the second magnet is arranged on the support plate, the side magnetic circuit comprises a first side magnet, an intermediate side magnet and a second side magnet sequentially arranged along the first direction, the first side magnet is arranged corresponding to the first magnet and has a magnetizing direction opposite to that of the first magnet, the second side magnet is arranged corresponding to the second magnet and has a magnetizing direction opposite to that of the second magnet, the intermediate side magnet is arranged corresponding to the magnetic conductive plate and the height of the intermediate side magnet along the first direction is not less than the height of the magnetic conductive plate along the first direction, the intermediate side magnet is magnetized along the second direction, the first direction is perpendicular to the second direction, and the polarity of the magnetic pole of the intermediate side magnet facing the magnetic gap is opposite to the polarity of the magnetic pole of the first side magnet and the second side magnet away from the intermediate side magnet, so that the side magnetic circuit can form a magnetic field enhancement side facing the magnetic gap;

[0007] A vibration system is connected to the shell, the vibration system includes a diaphragm and an annular voice coil for driving the diaphragm to vibrate along the first direction, the diaphragm includes a folded ring and a reinforcement portion arranged in the central area of ​​the folded ring, one end of the annular voice coil is connected to the reinforcement portion, and the other end is located in the magnetic gap.

[0008] In one embodiment, the folding ring, the reinforcing portion and the shell are integrally formed by injection molding;

[0009] Alternatively, the sound-emitting unit further comprises 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 an integral injection-molded component.

[0010] In one embodiment, the vibration system further comprises a bracket, and the reinforcement portion and the annular voice coil are respectively connected to two ends of the bracket;

[0011] Alternatively, the reinforcement portion has a support portion that bends and extends along the first direction, and the support portion is connected to the annular voice coil;

[0012] 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.

[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] Alternatively, at least a portion of the structure of the reinforcement portion is made of a breathable material, and the sound-emitting unit further includes a waterproof breathable membrane attached to the breathable material.

[0015] 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 through hole, and the side magnetic circuit has a protrusion extending into the through hole;

[0016] And / or, 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 an outer surface of the central portion protrudes toward a side away from the annular voice coil.

[0017] In one embodiment, the sound unit also includes a centering support plate, which includes a first fixing portion, an elastic arm portion and a second fixing portion, the first fixing portion is arranged on the shell, the second fixing portion is connected to the annular voice coil, and the two ends of the elastic arm portion are respectively connected to the first fixing portion and the second fixing portion.

[0018] 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.

[0019] In one embodiment, the conductive connection portion and the centering support piece are integrally formed.

[0020] 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, and the outer surface of the main body does not exceed the outer surface of the shell.

[0021] In one embodiment, the shell includes an annular body and a side wall connected to the annular body, the support plate includes a base plate and a surrounding plate, the central magnetic circuit and the side magnetic circuit are arranged on the base plate, the surrounding plate is connected to the side wall, and the first fixing portion is clamped between the surrounding plate and the side wall.

[0022] 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.

[0023] In one embodiment, the sound-emitting unit further includes a waterproof sealing ring, which is connected to a side of the shell 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. The front cover is arranged on the annular step and is located on the inner side of the waterproof sealing ring.

[0024] In one embodiment, the height of the middle side magnet along the first direction is not less than half the height of the annular voice coil along the first direction;

[0025] And / or, the height of the middle side magnet along the first direction is not less than the height of the first side magnet along the first direction;

[0026] And / or, the height of the middle side magnet along the first direction is not greater than the height of the second side magnet along the first direction.

[0027] In one embodiment, the length-to-width ratio of the sound-emitting unit is not greater than 10:1.

[0028] 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.

[0029] The technical solution of the present invention designs the magnetization direction of the magnets in the central magnetic circuit and the side magnetic circuit so that the magnetic lines of force can be focused on the position where the middle side magnets and the magnetic conductive plates are located, and most of the magnetic lines of force at this position pass horizontally through the annular voice coil, which greatly improves the strength of the magnetic field and forms 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

[0030] 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.

[0031] Figure 1 A schematic structural diagram of an embodiment of a sound-emitting unit provided by the present invention;

[0032] Figure 2 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

[0033] Figure 3 A schematic cross-sectional view of an embodiment of a sound-emitting unit provided by the present invention;

[0034] Figure 4 A schematic cross-sectional view of a part of the structure of an embodiment of a sound-emitting unit provided by the present invention;

[0035] Figure 5 A structural schematic diagram of a part of the structure of an embodiment of a sound-emitting unit provided by the present invention from another perspective;

[0036] Figure 6 A schematic structural diagram of an embodiment in which a diaphragm provided by the present invention is arranged on a housing;

[0037] Figure 7 A structural schematic diagram of an embodiment of a magnetic circuit system provided by the present invention being arranged on a support plate;

[0038] Figure 8 A structural schematic diagram of an embodiment of the magnetization direction of the magnetic circuit system provided by the present invention;

[0039] Fig. 9 A structural schematic diagram of an embodiment of the reinforcement portion provided by the present invention provided with reinforcement ribs;

[0040] Fig.10 A schematic structural diagram of an embodiment of a protrusion disposed at the central part of the shell of the sound-emitting unit provided by the present invention;

[0041] Fig.11 This is a structural schematic diagram of an embodiment of the present invention in which a sound-emitting unit is arranged in a housing.

[0042] Description of Figure Numbers:

[0043] 100, sound unit; 1, magnetic circuit system; 11, central magnetic circuit; 111, first magnet; 112, magnetic plate; 113, second magnet; 12, side magnetic circuit; 121, first side magnet; 122, middle side magnet; 123, second side magnet; 124, raised part; 13, support plate; 131, bottom plate; 132, enclosure; 133, mounting ear; 1331, mounting hole; 134, avoidance groove; 14, magnetic gap; 15, vibration gap; 2, vibration system; 21, diaphragm; 211, folding ring; 212, reinforcement part; 2121, micro hole; 213 , reinforcing ribs; 22, annular voice coil; 23, bracket; 231, connecting part; 232, conducting part; 2321, weight-reducing hole; 3, waterproof sealing ring; 31, annular step; 4, waterproof breathable membrane; 5, shell; 51, annular body; 52, side wall; 521, through hole; 53, insertion part; 54, center part; 55, end; 6, centering support plate; 61, first fixing part; 62, elastic arm part; 63, second fixing part; 7, conductive connecting part; 71, main body; 72, external connecting part; 721, external solder pad; 8, front cover; 81, mesh; 9, dust net;

[0044] 200. Shell.

[0045] 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

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figures 1 to 3 and Figure 8As shown, in one embodiment of the present invention, the aspect ratio of the sound-generating monomer 100 is greater than 2:1, and the sound-generating monomer 100 includes a shell 5, a magnetic circuit system 1 and a vibration system 2. The magnetic circuit system 1 is connected to the shell 5. The magnetic circuit system 1 includes a support plate 13 and a central magnetic circuit 11 and a side magnetic circuit 12 arranged on the support plate 13. The support plate 13 is made of a magnetic conductive material. The central magnetic circuit 11 and the side magnetic circuit 12 are spaced apart and a magnetic gap 14 is formed therebetween. The central magnetic circuit 11 includes a first magnet 111, a magnetic conductive plate 112 and a second magnet 113 arranged in sequence along a first direction. The second magnet 113 is arranged on the support plate 13. The side magnetic circuit 12 includes a first side magnet 121, an intermediate side magnet 122 and a second side magnet 123 arranged in sequence along the first direction. The first side magnet 121 is arranged corresponding to the first magnet 111 and is magnetized in the same direction as the first magnet 111. In the opposite direction, the second side magnet 123 is arranged corresponding to the second magnet 113 and is opposite to the magnetization direction of the second magnet 113, the middle side magnet 122 is arranged corresponding to the magnetic conductive plate 112 and the height of the middle side magnet 122 along the first direction is not less than the height of the magnetic conductive plate 112 along the first direction, the middle side magnet 122 is magnetized along the second direction, the first direction and the second direction are perpendicular, and the polarity of the magnetic pole of the middle side magnet 122 facing the magnetic gap 14 is opposite to the polarity of the magnetic pole of the first side magnet 121 and the second side magnet 123 away from the middle side magnet 122, so that the side magnetic circuit 12 can form a magnetic field enhancement side facing the magnetic gap 14; the vibration system 2 includes a diaphragm 21 and an annular voice coil 22 for driving the diaphragm 21 to vibrate along the first direction, one end of the annular voice coil 22 is connected to the diaphragm 21, and the other end is located in the magnetic gap 14.

[0052] The sound-emitting monomer 100 of the present invention may be a loudspeaker 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 loudspeaker monomer as an example.

[0053] 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 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.

[0054] The technical solution of the present invention designs the magnetization direction of the magnets in the center magnetic circuit 11 and the side magnetic circuit 12 so that the magnetic lines of force can be focused on the position where the middle side magnet 122 and the magnetic conductive plate 112 are located, and most of the magnetic lines of force at this position pass horizontally through the annular voice coil 22, which greatly improves the strength of the magnetic field and forms a magnetic field enhancement side toward the magnetic gap 14, thereby improving the magnetic field driving force and the acoustic performance of the speaker. It should be noted that 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 downward magnetization of the first magnet 111 as an example, the magnetization directions of the first magnet 111 and the second magnet 113 are opposite, so the second magnet 113 is magnetized upward. Since a magnetic conductive plate 112 is provided between the first magnet 111 and the second magnet 113, the magnetic lines of force from the first magnet 111 and the second magnet 113 are changed to pass through the annular voice coil 22 to the left and right under the correction effect of the magnetic conductive plate 112, thereby increasing the number of magnetic lines of force passing through the annular voice coil 22; since the middle side magnet 122 located on the left side of the magnetic gap 14 is magnetized to the left, and the middle side magnet 122 located on the right side of the magnetic gap 14 is magnetized to the right, in cooperation with the upward magnetization of the first side magnet 121, magnetic lines of force can be finally formed. The closed loop effectively enhances the magnetic field strength; and the middle side magnet 122 can cooperate with the second side magnet 123 with the magnetization direction opposite to the second magnet 113 to form a magnetic force line closed loop, further enhancing the magnetic field strength; and then cooperate with the magnetic conductive support plate 13 to correct the magnetic force lines, so that more magnetic force lines of the second side magnet 123 can enter the second magnet 113 under the correction of the support plate 13, and finally increase the number of magnetic force lines passing through the annular voice coil 22, thereby enhancing the magnetic field strength; through the design of the magnetization direction, the magnetic force lines are focused on the position of the middle side magnet 122 and the magnetic conductive plate 112, thereby enhancing the induction strength of the annular voice coil 22, thereby enhancing the magnetic field driving force, and improving the acoustic performance of the speaker. The annular voice coil 22 may be an ellipse or a quadrilateral, and is not limited here. The aspect ratio of the annular voice coil 22 matches the aspect ratio of the sound unit 100. The aspect ratio of the annular voice coil 22 refers to the ratio of the length dimension of the annular voice coil 22 along the third direction to the width dimension along the second direction. The first direction, the second direction and the third direction are perpendicular to each other. It should be noted that the third direction is Figure 1 Front-to-back orientation shown.

[0055] It should also 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. The aspect ratio of the sound unit 100 is set to be greater than 2:1, so that the overall shape of the entire sound unit 100 is approximately a long strip, thereby meeting some usage scenarios with strict size restrictions on width.

[0056] It is also necessary to explain that when the annular voice coil 22 is energized, the annular voice coil 22 performs a reciprocating motion in the magnetic gap 14 to cut the magnetic lines of force, driving the diaphragm 21 to vibrate up and down, thereby instigating the air to make sounds and completing the energy conversion between electricity and sound.

[0057] According to one embodiment of the present invention, the first side magnet 121 can be an integral ring magnet or a plurality of segmented magnets arranged at intervals, wherein the plurality of segmented magnets surround the periphery of the central magnetic circuit 11 and are arranged at intervals from the central magnetic circuit 11; or it can be composed of two bar magnets, wherein the two bar magnets are arranged on both sides of the central magnetic circuit 11 along the second direction.

[0058] According to another embodiment of the present invention, the middle side magnet 122 can be an integral ring magnet, or a plurality of segmented magnets arranged at intervals, wherein the plurality of segmented magnets surround the periphery of the central magnetic circuit 11 and are arranged at intervals from the central magnetic circuit 11; or it can be composed of two bar magnets, wherein the two bar magnets are arranged on both sides of the central magnetic circuit 11 along the second direction.

[0059] According to another embodiment of the present invention, the second side magnet 123 can be an integral ring magnet or a plurality of segmented magnets arranged at intervals, wherein the plurality of segmented magnets surround the periphery of the central magnetic circuit 11 and are arranged at intervals from the central magnetic circuit 11; or it can be composed of two bar magnets, wherein the two bar magnets are arranged on both sides of the central magnetic circuit 11 along the second direction.

[0060] According to an embodiment of the present invention, the first magnet 111, the magnetic conductive plate 112, and the second magnet 113 are connected in sequence, and the first side magnet 121, the middle side magnet 122, and the second side magnet 123 are connected in sequence, so that the entire magnetic circuit system 1 is more compact and the space occupied by the magnetic circuit system 1 is reduced. Further, by arranging the second magnet 113 and the second side magnet 123 on the support plate 13, the connection between the central magnetic circuit 11 and the side magnetic circuit 12 is achieved. Further, by connecting the first side magnet 121 to the housing 5, the connection and fixation of the magnetic circuit system 1 and the housing 5 can be achieved.

[0061] See also Figure 1 and Figure 2As shown, in one embodiment, the sound-emitting unit 100 includes a shell 5, and the magnetic circuit system 1 and the vibration system 2 are both connected to the shell 5. Among them, the diaphragm 21 includes a folding ring 211 and a reinforcement part 212 arranged in the central area of ​​the folding ring 211, and the folding ring 211 is connected to the shell 5. By providing the reinforcement part 212, the sound-emitting unit 100 has better directivity and transient response in the playback of high-frequency signals, and the reinforcement part 212 can also effectively reduce the split vibration of the diaphragm 21 and reduce the noise of the sound-emitting unit 100. It should be noted that the reinforcement part 212 can be a polymer material, such as polyphthalamide, polyphthalamide plus 35% glass fiber material, or carbon fiber, metal alloy and other materials. It should also be noted that the height of the diaphragm 21 is lower than the waterproof sealing ring 3, so that there is a vibration gap 15 between the diaphragm 21 and the waterproof sealing ring 3. When the waterproof sealing ring 3 is sealed against the outer shell 200, the vibration gap 15 provides a larger vibration space for the diaphragm 21, thereby reducing the probability of interference between the diaphragm 21 and the outer shell 200.

[0062] According to an embodiment of the present invention, the fold ring 211 is bent toward one side of the magnetic circuit system 1 so that the fold ring 211 protrudes toward the side where the annular voice coil 22 is located, thereby preventing the fold ring 211 from protruding outside the shell 5 and causing the overall height of the sound unit 100 to be too large.

[0063] See also Figures 3 to 5 As shown, in one embodiment, the folding ring 211, the reinforcement part 212 and the shell 5 are an integral injection-molded part. By integrally injecting the folding ring 211, the reinforcement part 212 and the shell 5, the number of sealing surfaces is effectively reduced, and the waterproof performance of the sound-emitting unit 100 is improved; and the folding ring 211, the reinforcement part 212 and the shell 5 are integrally injected, which can also improve the firmness of the joint surfaces of each component.

[0064] See also Figures 3 to 5 As shown, in one embodiment, the sound-generating unit 100 further includes a waterproof sealing ring 3, which is arranged around the folding ring 211, and the waterproof sealing ring 3, the folding ring 211, the reinforcement part 212 and the housing 5 are an integral injection-molded component. The waterproof sealing ring 3 is provided to improve the waterproof performance of the sound-generating unit 100, and the waterproof sealing ring 3, the folding ring 211, the reinforcement part 212 and the housing 5 are integrally injection-molded to improve the firmness of the joint surfaces of the components.

[0065] See also Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, the vibration system 2 further includes a bracket 23, and the reinforcement portion 212 and the annular voice coil 22 are respectively connected to both ends of the bracket 23; the driving force of the annular voice coil 22 is transmitted by setting the bracket 23, thereby driving the diaphragm 21 to vibrate.

[0066] According to an embodiment of the present invention, the bracket 23 includes a connecting portion 231 and two conducting portions 232, the two conducting portions 232 are arranged at intervals along the second direction at both ends of the connecting portion 231, the other side of the connecting portion 231 is connected to the two conducting portions 232, the two conducting portions 232 are arranged at intervals along the second direction, and the ends of the two conducting portions 232 away from the connecting portion 231 are respectively connected to the two long axis segments of the annular voice coil 22 arranged oppositely along the second direction, so as to reduce the probability of polarization of the annular voice coil 22 and improve the acoustic performance of the sound unit 100. It should be noted that both conducting portions 232 are provided with a plurality of weight-reducing holes 2321, and the plurality of weight-reducing holes 2321 are arranged in sequence along the third direction.

[0067] In one embodiment, the reinforcement portion 212 has a support portion bent and extended along a first direction, and the support portion is connected to the annular voice coil 22; the support portion is provided to connect the annular voice coil 22, thereby replacing the connection of the original bracket 23, eliminating the bracket 23 as a structural component, reducing the installation process of the bracket 23, and reducing the production cost of the sound unit 100.

[0068] According to one embodiment of the present invention, the supporting portion includes a first supporting protrusion and a second supporting protrusion, the annular voice coil 22 includes two long axis segments spaced apart along a second direction and two short axis segments spaced apart along a third direction, and the first supporting protrusion and the second supporting protrusion are respectively connected to the two long axis segments of the annular voice coil 22, thereby effectively reducing the probability of polarization occurring in the annular voice coil 22.

[0069] See also Fig. 9 As shown, in one embodiment, the reinforcing portion 212 is provided with a reinforcing rib 213, which is located in the central area of ​​the reinforcing portion 212 and extends along the long side direction of the housing 5. The structure of the reinforcing portion 212 is strengthened by providing the reinforcing rib 213, so that the resonance of the reinforcing portion 212 can be effectively moved to a high frequency. It should be noted that the reinforcing rib 213 is directly bonded to the annular voice coil 22. It should be noted that the long side direction is Figure 1 Front-to-back orientation shown.

[0070] See also Figure 5 and Figure 6 As shown, in one embodiment, the reinforcement part 212 is provided with a plurality of micropores 2121, and the sound unit 100 also includes a waterproof breathable membrane 4 covering the micropores 2121; by providing a plurality of micropores 2121 on the reinforcement part 212, it is beneficial to balance the air pressure inside and outside the sound unit 100, and by providing a waterproof breathable membrane 4 covering the micropores 2121, 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.

[0071] In one embodiment, at least part of the structure of the reinforcement part 212 is a breathable material, and the sound-emitting unit 100 further includes a waterproof breathable membrane 4 attached to the breathable material. At least part of the reinforcement part 212 is set as a breathable material, which is conducive to the balance of the internal and external air pressure of the sound-emitting unit 100. By setting the waterproof breathable membrane 4 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 an organic aerogel, or a foam metal, etc.

[0072] See also Figures 1 to 3 As shown, in one embodiment, the shell 5 includes an annular body 51 and a side wall 52 connected to the annular body 51; the side wall 52 is provided with a through hole 521, and the side magnetic circuit 12 has a protrusion 124 extending into the through hole 521. By providing the through hole 521 in the side wall 52, the side magnetic circuit 12 can extend outward to form the protrusion 124, thereby increasing the volume of the side magnetic circuit 12, improving the magnetic field strength, and further improving the acoustic performance of the sound-emitting unit 100. It should be noted that the through hole 521 passes through the two side walls 52 arranged opposite to each other along the second direction, and the two outer walls of the side magnetic circuit 12 arranged opposite to each other along the second direction both extend outward to form the protrusion 124, and the two protrusions 124 are respectively located in the two through holes 521.

[0073] According to another embodiment of the present invention, the shell 5 also includes an insertion portion 53, which is connected to the side wall 52, and the insertion portion 53 extends along the first direction. There are multiple insertion portions 53, and the multiple insertion portions 53 are arranged at intervals along the circumference of the annular body 51. The support plate 13 is provided with avoidance grooves 134 for the insertion portions 53 to be inserted. The avoidance grooves 134 are consistent in number with the insertion portions 53 and are arranged one-to-one. Through the cooperation between the insertion portion 53 and the avoidance grooves 134, the movement of the support plate 13 relative to the shell 5 in a direction perpendicular to the first direction is effectively restricted, thereby improving the connection stability between the shell 5 and the support plate 13.

[0074] See also Figures 1 to 3 As shown, in one embodiment, the sound unit 100 further includes a centering support 6, and the centering support 6 includes a first fixing portion 61, an elastic arm portion 62, and a second fixing portion 63. The first fixing portion 61 is provided on the housing 5, and the second fixing portion 63 is connected to the annular voice coil 22. The two ends of the elastic arm portion 62 are respectively connected to the first fixing portion 61 and the second fixing portion 63. By providing the centering support 6, the probability of polarization of the annular voice coil 22 is reduced, and the vibration stability of the annular voice coil 22 is improved. In this embodiment, the side magnetic circuit 12 has a support avoidance space for avoiding the centering support 6.

[0075] In one embodiment, two centering supports 6 are respectively disposed at two ends of the long side direction of the housing 5, and the two centering supports 6 are connected by a conductive connection portion 7, and the conductive connection portion 7 is further provided with an external pad 721 that can be electrically connected to an external circuit. By arranging the conductive connection portion 7 along the long side direction of the housing 5, the two centering supports 6 can be electrically connected, so that it is convenient to introduce the external circuit current into the annular voice coil 22.

[0076] In one embodiment, the conductive connecting portion 7 and the centering support plate 6 are integrally formed. The conductive connecting portion 7 and the centering support plate 6 are integrally formed, thereby reducing the number of parts that need to be assembled and omitting assembly steps, which not only improves the assembly efficiency of the sound unit 100, but also avoids assembly errors.

[0077] In one embodiment, the conductive connection part 7 includes a main body 71 connecting two centering support pieces 6 and an external connection part 72 connected to one end of the main body 71, the external connection part 72 is provided with an external solder pad 721, the main body 71 is provided on the side of the magnetic circuit system 1, and the outer surface of the main body 71 does not exceed the outer surface of the housing 5. The outer surface of the main body 71 does not exceed the outer surface of the housing 5, thereby avoiding the phenomenon that the overall size of the sound unit 100 increases due to the protrusion of the main body 71 and the risk of interference between the main body 71 and other components of the electronic device.

[0078] See also Figures 1 to 3 As shown, in one embodiment, the housing 5 includes an annular body 51 and a side wall 52 connected to the annular body 51, the support plate 13 includes a bottom plate 131 and a surrounding plate 132, the central magnetic circuit 11 and the side magnetic circuit 12 are arranged on the bottom plate 131, the surrounding plate 132 is connected to the side wall 52, and the first fixing portion 61 is sandwiched between the surrounding plate 132 and the side wall 52. The first fixing portion 61 is sandwiched between the surrounding plate 132 and the side wall 52, so as to effectively fix the first fixing portion 61, thereby improving the vibration stability of the annular voice coil 22.

[0079] See also Figure 2 and Figure 7 As shown, according to one embodiment of the present invention, the support plate 13 also includes mounting ears 133, and the mounting ears 133 are each provided with a mounting hole 1331, so as to facilitate the installation of the sound unit 100; wherein, the number of the mounting ears 133 is two, and the two mounting ears 133 are respectively arranged on both sides of the bottom plate 131 along the long side direction of the shell 5, and each mounting ear 133 is provided with a mounting hole 1331, so as to facilitate the precise installation of the sound unit 100.

[0080] See also Figures 1 to 3As shown, in one embodiment, the sound-emitting unit 100 further includes a front cover 8, which is disposed on the side of the diaphragm 21 away from the magnetic circuit system 1, and a mesh hole 81 is provided on the front cover 8. The sound-emitting unit 100 further includes a dustproof net 9, and the dustproof net 9 covers the mesh hole 81. By providing the mesh hole 81 on the front cover 8, the probability of the sound-emitting unit 100 failing due to a sharp object piercing the diaphragm 21 can be effectively reduced. The dustproof net 9 is provided to cover the mesh hole 81 in order to prevent external dust from falling on the diaphragm 21 through the mesh hole 81 and affecting the acoustic performance of the sound-emitting unit 100. It should be noted that there are multiple mesh holes 81, and the shapes and sizes of the multiple mesh holes 81 are not exactly the same, and the distribution of the multiple mesh holes 81 can be adjusted as needed.

[0081] According to an embodiment of the present invention, the shape of the mesh 81 is irregular, and the amplitude symmetry of the sound unit 100 can be adjusted by adjusting the shape of the mesh 81 .

[0082] According to another embodiment of the present invention, the mesh 81 includes a first hole and a second hole, and the hole areas of the first hole and the second hole are different, that is, the apertures of the first hole and the second hole are different. This setting can effectively adjust the amplitude symmetry of the sound unit 100.

[0083] According to another embodiment of the present invention, the first hole and the second hole are alternately arranged along the long side or the short side of the sound unit 100, or the first holes are scattered between the second holes, or the front cover 8 includes a first area corresponding to the first holes and a second area corresponding to the second holes; by changing the arrangement of the first holes and the second holes, the amplitude symmetry of the sound unit 100 can also be effectively adjusted.

[0084] In one embodiment, the sound unit 100 further includes a waterproof sealing ring 3, which is connected to the side of the housing 5 away from the magnetic circuit system 1. The waterproof sealing ring 3 is arranged around the folding ring 211 and forms an annular step 31 at the connection with the folding ring 211. The front cover 8 is arranged on the annular step 31 and is located inside the waterproof sealing ring 3. The front cover 8 is reliably supported by forming the annular step 31, and the front cover 8 is placed on the annular step 31, so that the front cover 8 does not increase the size of the entire sound unit 100 due to the protruding sealing ring setting. The front cover 8 is arranged on the annular step 31 and is located inside the waterproof sealing ring 3 to effectively reduce the size of the sound unit 100, so that the sound unit 100 can better meet the needs of a narrow installation environment.

[0085] See also Fig.10 and Fig.11In one embodiment, the housing 5 has a central portion 54 and end portions 55 located at both ends of the central portion 54 along the long side direction of the housing 5, and the outer surface of the central portion 54 protrudes toward the side away from the annular voice coil 22. It should be noted that the outer surface of the central portion 54 close to the diaphragm protrudes toward the side away from the annular voice coil 22, wherein the central portion 54 protrudes toward the side away from the annular voice coil 22 in order to better match the shape of the housing 200 of the electronic device, so that the housing 5 can extend along the housing 200, and the housing 5 can be sealed and abutted against the housing 200; the outer surface of the central portion 54 protrudes toward the side away from the annular voice coil 22, so that the housing 5 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 21 is similar to that of the housing 5. By matching the shape of the housing 5 with that of the outer shell 200, part of the gap is used as the vibration space of the diaphragm 21, thereby increasing the vibration space of the diaphragm 21 without increasing the installation space of the sound unit 100, and increasing the volume of the sound cavity in front of the sound unit 100, thereby effectively improving the acoustic performance of the sound unit 100. It should be noted that the outer surface of the housing 5 can be an overall arc-shaped structure, or the center portion 54 can be a flat portion, and the end portion 55 can be a flat portion or a curved portion, or the center portion 54 can be a curved portion, and the end portion 55 can be a flat portion or a curved portion.

[0086] See also Figure 3 and Figure 8 In one embodiment, the height of the middle side magnet 122 along the first direction is not less than half of the height of the annular voice coil 22 along the first direction; this arrangement can effectively widen the magnetic field area where the annular voice coil 22 is located, and enhance the driving force of the annular voice coil 22, thereby effectively improving the acoustic performance of the sound unit 100 without increasing the volume of the sound unit 100.

[0087] In one embodiment, the height of the middle side magnet 122 along the first direction is not less than the height of the first side magnet 121 along the first direction; through this arrangement, the magnetic lines of force generated by the first side magnet 121 will not be dispersed too much but will be better focused on the position of the magnetic conductive plate 112, thereby increasing the number of magnetic lines of force passing through the annular voice coil 22, thereby effectively improving the acoustic performance of the sound unit 100 without increasing the volume of the sound unit 100.

[0088] In one embodiment, the height of the middle side magnet 122 along the first direction is not greater than the height of the second side magnet 123 along the first direction. This arrangement can enhance the magnetic field strength of the second side magnet 123 passing through the support plate 13, thereby increasing the magnetic induction strength of the annular voice coil 22, thereby effectively improving the acoustic performance of the sound unit 100 without increasing the volume of the sound unit 100.

[0089] 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.

[0090] See also Fig.11 The present invention also provides an electronic device, which includes 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.

[0091] 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 is connected to the shell, the magnetic circuit system includes a support plate and a central magnetic circuit and a side magnetic circuit arranged on the support plate, the support plate is made of magnetic conductive material, the central magnetic circuit is spaced from the side magnetic circuit and a magnetic gap is formed therebetween, the central magnetic circuit includes a first magnet, a magnetic conductive plate and a second magnet arranged in sequence along a first direction, the second magnet is arranged on the support plate, the side magnetic circuit includes a first side magnet, an intermediate side magnet and a second side magnet arranged in sequence along the first direction, the first side magnet is arranged corresponding to the first magnet and has a magnetizing direction opposite to that of the first magnet, the second side magnet is arranged corresponding to the second magnet and has a magnetizing direction opposite to that of the second magnet, the intermediate side magnet is arranged corresponding to the magnetic conductive plate and the height of the intermediate side magnet along the first direction is not less than the height of the magnetic conductive plate along the first direction, the intermediate side magnet is magnetized along the second direction, the first direction is perpendicular to the second direction, and the polarity of the magnetic pole of the intermediate side magnet facing the magnetic gap is opposite to the polarity of the magnetic pole of the first side magnet and the second side magnet away from the intermediate side magnet, so that the side magnetic circuit can form a magnetic field enhancement side facing the magnetic gap; A vibration system is connected to the shell, the vibration system includes a diaphragm and an annular voice coil for driving the diaphragm to vibrate along the first direction, the diaphragm includes a folded ring and a reinforcement portion arranged in the central area of ​​the folded ring, one end of the annular voice coil is connected to the reinforcement portion, and the other end is located in the magnetic gap.

2. The sound-emitting unit according to claim 1, characterized in that: The folding ring, the reinforcing part and the shell are integrally formed by injection molding; Alternatively, the sound-emitting unit further comprises 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 an integral injection-molded component.

3. The sound-emitting unit according to claim 1, characterized in that: The vibration system further comprises a bracket, and the reinforcement portion and the annular voice coil are respectively connected to two ends of 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 annular voice coil; 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.

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 a portion of the structure of the reinforcement portion is made of a breathable material, and the sound-emitting unit further includes a waterproof breathable membrane attached to the breathable material.

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 through hole, and the side magnetic circuit has a protrusion extending into the through hole; And / or, 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 an outer surface of the central portion protrudes toward a side away from the annular voice coil.

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 annular voice coil, and 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 7, characterized in that: The conductive connection portion and the centering support piece are integrally formed parts; 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, and the outer surface of the main body does not exceed the outer surface of the shell.

9. 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 central magnetic circuit and the side magnetic circuit are arranged on the bottom plate, the surrounding plate is connected to the side wall, and the first fixing portion is clamped between the surrounding plate and the side wall.

10. 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.

11. The sound-emitting unit according to claim 10, characterized in that: The sound-emitting unit also includes a waterproof sealing ring, which is connected to a side of the shell 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. The front cover is arranged on the annular step and is located on the inner side of the waterproof sealing ring.

12. The sound-emitting unit according to any one of claims 1 to 11, characterized in that: The height of the middle side magnet along the first direction is not less than half of the height of the annular voice coil along the first direction; And / or, the height of the middle side magnet along the first direction is not less than the height of the first side magnet along the first direction; And / or, the height of the middle side magnet along the first direction is not greater than the height of the second side magnet along the first direction.

13. The sound-emitting unit according to any one of claims 1 to 11, characterized in that: The length-to-width ratio of the sound-emitting unit is not greater than 10:

1.

14. 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 13, wherein the sound-emitting unit is arranged in the housing.

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