Sound production monomer and sound production module

Abstract

The application discloses a sound production monomer and a sound production module, and relates to the technical field of sound energy conversion. The sound production monomer comprises a magnetic circuit system and a vibration system. The magnetic circuit system is formed with an auxiliary magnetic gap arranged along a first direction and a main magnetic gap. The main magnetic gap comprises a first magnetic gap and a second magnetic gap which are arranged at intervals along a second direction. The vibration system vibrates along the first direction. The vibration system comprises a diaphragm, a first voice coil, a second voice coil, an auxiliary voice coil and a connecting assembly. The first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, and the auxiliary voice coil is located in the auxiliary magnetic gap. The first voice coil and the second voice coil are connected with the auxiliary voice coil through the connecting assembly. The first voice coil and the second voice coil are connected with the diaphragm on the side away from the auxiliary voice coil. The current direction of the first voice coil and the current direction of the second voice coil are opposite to the current direction of the auxiliary voice coil. The driving force directions of the first voice coil, the second voice coil and the auxiliary voice coil on the diaphragm are the same, and better performance improvement is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sound energy conversion, and in particular to a sound-emitting unit and a sound-emitting module. Background Art

[0002] As smart products become thinner, the limited internal space poses a huge challenge to the acoustic performance of speakers. If the size of the speaker is reduced, the performance of the speaker will be weakened. This is because traditional speakers usually improve performance by increasing the volume of the magnet to obtain better performance. However, the use of large-volume magnets will cause the size of the speaker to increase, resulting in the speaker being unable to meet size requirements. However, if the size of the speaker is reduced, the space inside the speaker will also decrease, that is, the space for accommodating the magnet may also decrease. In the case of insufficient space, only smaller magnets can be used, but the reduction in the volume of the magnet will cause the performance of the speaker to even fail to meet the requirements of the entire machine. Summary of the Invention

[0003] The main purpose of the present invention is to propose a sound unit and a sound module, aiming to solve the problem of how to improve the performance of the speaker.

[0004] To achieve the above-mentioned purpose, the sound-emitting unit proposed in the present invention includes:

[0005] A magnetic circuit system is formed with an auxiliary magnetic gap and a main magnetic gap arranged along a first direction, the main magnetic gap includes a first magnetic gap and a second magnetic gap arranged at intervals along a second direction, the second direction is perpendicular to the first direction, and the first magnetic gap and the second magnetic gap are both connected to the auxiliary magnetic gap;

[0006] A vibration system that vibrates along the first direction, the vibration system comprising a diaphragm, a first voice coil, a second voice coil, an auxiliary voice coil, and a connecting assembly, wherein the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, and the auxiliary voice coil is located in the auxiliary magnetic gap. The first voice coil and the second voice coil are both connected to the auxiliary voice coil via the connecting assembly, and the sides of the first voice coil and the second voice coil away from the auxiliary voice coil are both connected to the diaphragm, and the current directions of the first voice coil and the second voice coil are opposite to the current direction of the auxiliary voice coil.

[0007] In one embodiment, the magnetic circuit system includes a magnetic circuit unit and a magnetic yoke unit, the magnetic yoke unit is arranged on the side of the magnetic circuit unit away from the diaphragm, the magnetic circuit unit forms the first magnetic gap and the second magnetic gap, the magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke arranged on the peripheral side of the central magnetic yoke, and the auxiliary magnetic gap is formed between the side magnetic yoke and the central magnetic yoke.

[0008] In one embodiment, the magnetic circuit unit includes a central magnetic circuit and a side magnetic circuit, the central magnetic yoke is arranged on the side of the central magnetic circuit away from the diaphragm, and the side magnetic yoke is arranged on the side of the side magnetic circuit away from the diaphragm; the central magnetic circuit includes a central magnetic part and an intermediate magnetic part arranged on the circumference of the central magnetic part, the central magnetic part, the intermediate magnetic part and the side magnetic circuit are all magnetized along the first direction, and the magnetization directions of the central magnetic part and the side magnetic circuit are opposite to the magnetization direction of the intermediate magnetic part, and the central magnetic part, the intermediate magnetic part and the side magnetic circuit enclose the first magnetic gap and the second magnetic gap.

[0009] In one embodiment, the intermediate magnetic portion includes a first intermediate magnetic portion and a second intermediate magnetic portion, and the first intermediate magnetic portion and the second intermediate magnetic portion are respectively arranged on both sides of the central magnetic portion along the second direction, and the central magnetic portion, the first intermediate magnetic portion and the side magnetic circuit form the first magnetic gap, and the central magnetic portion, the second intermediate magnetic portion and the side magnetic circuit form the second magnetic gap.

[0010] In one embodiment, the central magnetic portion includes a central magnet and a central magnetic conductive plate arranged on the side of the central magnet facing the diaphragm, the side magnetic circuit includes a side magnet and a side magnetic conductive plate arranged on the side of the side magnet facing the diaphragm, the central magnet and the side magnet are magnetized along the first direction and have the same magnetization direction, the first intermediate magnetic portion includes a first magnet and a first magnetic conductive plate arranged on the side of the first magnet facing the diaphragm, the second intermediate magnetic portion includes a second magnet and a second magnetic conductive plate arranged on the side of the second magnet facing the diaphragm, the first magnet and the second magnet are magnetized along the first direction and the magnetization directions are opposite to the magnetization direction of the central magnet, the central magnetic conductive plate, the first magnetic conductive plate and the side magnetic conductive plate form the first magnetic gap, and the central magnetic conductive plate, the second magnetic conductive plate and the side magnetic conductive plate form the second magnetic gap.

[0011] In one embodiment, the outer periphery of the central magnetic yoke is bent toward the diaphragm to form a first flange, and the central magnetic circuit is provided with an avoidance groove corresponding to the first flange;

[0012] and / or,

[0013] The inner periphery of the side magnetic yoke is bent toward the diaphragm to form a second flange, and the side magnetic circuit is provided with a flange avoidance groove corresponding to the second flange.

[0014] In one embodiment, the sound unit further includes a back cover, wherein the central magnetic yoke and the side magnetic yoke are both provided on the back cover on a side facing away from the diaphragm, and the back cover protrudes in a direction away from the diaphragm to form an annular avoidance groove, wherein the notch of the annular avoidance groove is provided toward the auxiliary magnetic gap and communicates with the auxiliary magnetic gap, and the annular avoidance groove is used to avoid the auxiliary voice coil;

[0015] And / or, a leakage hole is provided on the side magnetic yoke, and an isolation mesh hole correspondingly connected to the leakage hole is provided on the back cover;

[0016] And / or, the edge magnetic yoke is an annular edge magnetic yoke.

[0017] In one embodiment, the sound unit also includes a shell, the connecting assembly includes a centering support and a rigid connector, the vibration system and the magnetic circuit system are respectively connected to the two ends of the shell, the outer periphery of the diaphragm is connected to the shell, the centering support includes a fixing portion, a mounting portion and an elastic arm portion connecting the fixing portion and the mounting portion, one side of the fixing portion is connected to the first voice coil and the second voice coil, the other side of the fixing portion is connected to the rigid connector, the mounting portion is connected to the shell, and the side of the rigid connector facing away from the fixing portion is connected to the auxiliary voice coil.

[0018] In one embodiment, the rigid connector includes a connecting portion and a supporting portion, wherein the supporting portion is provided on a side of the connecting portion facing the centering support and connected to the centering support, and a side of the connecting portion facing away from the supporting portion is connected to the auxiliary voice coil.

[0019] In one embodiment, the connecting portion is an annular connecting portion, and there are multiple supporting portions, which are arranged at intervals along the circumference of the annular connecting portion.

[0020] In one embodiment, the fixing portion is an annular fixing portion, and the centering support further includes a first soldering pad, a second soldering pad, and a third soldering pad, wherein the first soldering pad and the second soldering pad are respectively arranged on a side of the annular fixing portion facing the diaphragm, the first voice coil is electrically connected to the first soldering pad, the second voice coil is electrically connected to the second soldering pad, and the third soldering pad is arranged on a side of the annular fixing portion facing away from the diaphragm, and the auxiliary voice coil is electrically connected to the third soldering pad.

[0021] Alternatively, the centering support includes two, and the two centering supports are respectively arranged on both sides of the vibration system, and the arrangement direction of the two centering supports is perpendicular to the second direction. The centering support also includes a first soldering pad, a second soldering pad and a third soldering pad, and the first soldering pad and the second soldering pad are respectively arranged on the side of the fixing portion facing the diaphragm, the first voice coil is electrically connected to the first soldering pad, the second voice coil is electrically connected to the second soldering pad, and the third soldering pad is arranged on the side of the fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third soldering pad.

[0022] The present invention also proposes a sound module, which includes a shell and the above-mentioned sound unit, and the sound unit is arranged in the shell.

[0023] The technical solution of the present invention drives the diaphragm to vibrate by adopting a first voice coil and a second voice coil arranged at intervals along the second direction, and the current directions of the first voice coil and the second voice coil are the same, and the driving force generated is also the same. The diaphragm vibration is driven by the first voice coil and the second voice coil, which has better performance than a single voice coil speaker; by adding an auxiliary voice coil, the auxiliary voice coil is connected to the first voice coil and the second voice coil through a connecting component, and the current direction of the first voice coil and the current direction of the second voice coil are opposite to the current direction of the auxiliary voice coil, so that the auxiliary voice coil arranged in the auxiliary magnetic gap can also generate a driving force in the same direction as the first voice coil and the second voice coil, and the driving force cooperates with the driving force of the first voice coil and the second voice coil to act on the diaphragm to drive the diaphragm to vibrate, so that the sound unit has better performance improvement compared to the speaker with two voice coils arranged at intervals along the second direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of an embodiment of a sound-emitting unit provided by the present invention;

[0026] Figure 2 A schematic structural diagram of the sound-emitting unit provided by the present invention from another perspective;

[0027] Figure 3 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

[0028] Figure 4 A schematic cross-sectional view of an embodiment of a sound-emitting unit provided by the present invention;

[0029] Figure 5 A schematic cross-sectional view of a portion of the structure of an embodiment of a sound-emitting unit provided by the present invention;

[0030] Figure 6 A schematic structural diagram of an embodiment of the first voice coil, the second voice coil, the auxiliary voice coil, and the centering support provided by the present invention;

[0031] Figure 7 A schematic structural diagram of the first voice coil, the second voice coil, the auxiliary voice coil, and the centering support provided by the present invention from another perspective;

[0032] Figure 8 for Figure 7 Schematic diagram of the top view structure;

[0033] Figure 9 This is a schematic diagram of the BL curve of the sound unit provided by the present invention and the traditional single-layer voice coil.

[0034] Description of Figure Numbers:

[0035] 100. Sounding unit; 1. Magnetic circuit system; 11. Magnetic circuit unit; 111. Center magnetic circuit; 1111. Center magnetic part; 11111. Center magnet; 11112. Center magnetic plate; 1112. First intermediate magnetic part; 11121. First magnet; 11122. First magnetic plate; 11123. First avoidance groove; 1113. Second intermediate magnetic part; 11131. Second magnet; 11132. Second magnetic plate; 11133. Second avoidance groove; 112. Side magnetic circuit; 1121. Side magnet; 1122. Side magnetic plate; 11221. Flanged avoidance groove; 113. First magnetic gap; 114. Second magnetic gap; 12. Magnetic yoke unit; 121. Center magnetic yoke; 1211. First 1. Main body; 1212. First flange; 122. Edge magnetic yoke; 1221. Second main body; 1222. Second flange; 1223. Leakage hole; 123. Auxiliary magnetic gap; 2. Vibration system; 21. Diaphragm; 211. Reinforcement part; 22. First voice coil; 23. Second voice coil; 24. Auxiliary voice coil; 25. Connecting assembly; 251. Centering support plate; 2511. Fixing part; 2512. Mounting part; 2513. Elastic arm part; 2514. First soldering pad; 2515. Second soldering pad; 2516. Third soldering pad; 252. Rigid connector; 2521. Connecting part; 25211. Groove; 2522. Support part; 3. Back cover; 31. Annular avoidance groove; 32. Isolation mesh; 4. Shell.

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0038] 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 under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel 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 mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] As smart products become thinner, the limited internal space poses a huge challenge to the acoustic performance of speakers. If the size of the speaker is reduced, the performance of the speaker will be weakened. This is because traditional speakers usually improve performance by increasing the volume of the magnet to obtain better performance. However, the use of large-volume magnets will cause the size of the speaker to increase, resulting in the speaker being unable to meet size requirements. However, if the size of the speaker is reduced, the space inside the speaker will also decrease, that is, the space for accommodating the magnet may also decrease. In the case of insufficient space, only smaller magnets can be used, but the reduction in the volume of the magnet will cause the performance of the speaker to even fail to meet the requirements of the entire machine.

[0041] In view of this, it is necessary to propose a sound unit and a sound module to solve the problem of how to enhance the performance of the speaker.

[0042] See also Figures 3 to 5In one embodiment of the present invention, the sound-emitting unit 100 includes a magnetic circuit system 1 and a vibration system 2. The magnetic circuit system 1 is formed with an auxiliary magnetic gap 123 and a main magnetic gap arranged along a first direction. The main magnetic gap includes a first magnetic gap 113 and a second magnetic gap 114 spaced apart along a second direction. The second direction is perpendicular to the first direction. The first magnetic gap 113 and the second magnetic gap 114 are both connected to the auxiliary magnetic gap 123. The vibration system 2 vibrates along the first direction. The vibration system 2 includes a diaphragm 21, a first voice coil 22, and a second voice coil 23. Two voice coils 23, an auxiliary voice coil 24 and a connecting component 25, the first voice coil 22 is located in the first magnetic gap 113, the second voice coil 23 is located in the second magnetic gap 114, and the auxiliary voice coil 24 is located in the auxiliary magnetic gap 123. The first voice coil 22 and the second voice coil 23 are both connected to the auxiliary voice coil 24 through the connecting component 25. The sides of the first voice coil 22 and the second voice coil 23 away from the auxiliary voice coil 24 are both connected to the diaphragm 21. The current direction of the first voice coil 22 and the current direction of the second voice coil 23 are opposite to the current direction of the auxiliary voice coil 24.

[0043] The sound unit 100 of the present invention may be a speaker unit, and the sound unit 100 may be applied to a sound module of an electronic device, such as a computer, a mobile phone, a smart wearable device, etc. This embodiment is described by taking the sound unit 100 as a speaker unit as an example.

[0044] The technical solution of the present invention drives the diaphragm 21 to vibrate by using a first voice coil 22 and a second voice coil 23 spaced apart along the second direction, and the current directions of the first voice coil 22 and the second voice coil 23 are the same, and the driving force generated on the diaphragm 21 is also in the same direction. The vibration of the diaphragm 21 driven by the first voice coil 22 and the second voice coil 23 has better performance than a single voice coil speaker; by adding an auxiliary voice coil 24, the auxiliary voice coil 24 is connected to the first voice coil 22 and the second voice coil 23 through a connecting component 25, and the current directions of the first voice coil 22 and the second voice coil 23 are opposite to the current direction of the auxiliary voice coil 24, so that the auxiliary voice coil 24 located in the auxiliary magnetic gap 123 can also generate a driving force in the same direction as the first voice coil 22 and the second voice coil 23. This driving force cooperates with the driving force of the first voice coil 22 and the second voice coil 23 to act on the diaphragm 21 to drive the diaphragm 21 to vibrate, so that the sound unit 100 has better performance improvement than a speaker with two voice coils spaced apart along the second direction. It should be noted that, please refer to Figure 4 The first direction is the up-down direction, and the second direction is the left-right direction. It should also be noted that the auxiliary voice coil 24 is a single annular voice coil.

[0045] It should be noted that when the first voice coil 22, the second voice coil 23 and the auxiliary voice coil 24 are energized, the first voice coil 22 and the second voice coil 23 respectively make reciprocating cutting magnetic lines of force in the first magnetic gap 131 and the second magnetic gap 132, and the auxiliary voice coil 24 makes reciprocating cutting magnetic lines of force in the auxiliary magnetic gap 123, driving the diaphragm 21 to vibrate up and down, thereby instigating the air to make sound and completing the energy conversion between electricity and sound.

[0046] According to an embodiment of the present invention, a reinforcement portion 211 is provided on the diaphragm 21. The reinforcement portion 211 enables the sound unit 100 to have better directivity and transient response in the reproduction of high-frequency signals.

[0047] See also Figures 1 to 3 In one embodiment, the magnetic circuit system 1 includes a magnetic circuit unit 11 and a yoke unit 12. The yoke unit 12 is disposed on a side of the magnetic circuit unit 11 facing away from the diaphragm 21. The magnetic circuit unit 11 forms a first magnetic gap 113 and a second magnetic gap 114. The yoke unit 12 includes a central yoke 121 and side yokes 122 disposed around the central yoke 121. An auxiliary magnetic gap 123 is formed between the side yokes 122 and the central yoke 121. The side yokes 122 surround the central yoke 121 and are spaced apart from it. By providing magnetic conduction between the central yoke 121 and the side yokes 122, the magnetic flux in the auxiliary magnetic gap 123 is ensured, thereby enhancing the driving force provided by the auxiliary voice coil 24 on the diaphragm 21 and improving the performance of the speaker 100. Furthermore, the auxiliary magnetic gap is formed by utilizing the magnetic yoke unit 12 of the magnetic circuit system 1 itself, without increasing the size of the magnetic circuit system 1 , thereby facilitating the miniaturization design of the sound unit 100 .

[0048] See also Figures 3 to 5In one embodiment, the magnetic circuit unit 11 includes a central magnetic circuit 111 and a side magnetic circuit 112, the central magnetic yoke 121 is arranged on the side of the central magnetic circuit 111 away from the diaphragm 21, and the side magnetic yoke 122 is arranged on the side of the side magnetic circuit 112 away from the diaphragm 21; the central magnetic circuit 111 includes a central magnetic portion 1111 and an intermediate magnetic portion arranged on the circumference of the central magnetic portion, the central magnetic portion 1111, the intermediate magnetic portion and the side magnetic circuit 112 form a first magnetic gap 113 and a second magnetic gap 114, the central magnetic portion 1111, the intermediate magnetic portion and the side magnetic circuit 112 are all magnetized along a first direction, and the magnetization directions of the central magnetic portion 1111 and the side magnetic circuit 112 are opposite to the magnetization direction of the intermediate magnetic portion. Among them, the central magnetic portion 1111, the intermediate magnetic portion and the side magnetic circuit 112 are all arranged along the second direction, and the magnetization directions of the central magnetic portion 1111 and the intermediate magnetic portion are opposite, and the magnetization directions of the intermediate magnetic portion and the side magnetic circuit 112 are opposite, ensuring that the driving force directions of the first voice coil 22, the second voice coil 23 and the auxiliary voice coil 24 on the diaphragm 21 are consistent. It should be noted that the side magnetic circuit 112 is arranged on the circumferential side of the intermediate magnetic portion and is spaced apart from the intermediate magnetic portion to form a gap, which constitutes another part of the first magnetic gap 113 and also another part of the second magnetic gap 114; the intermediate magnetic portion can also be a plurality of intermediate magnetic groups spaced apart, and the intermediate magnetic groups are spaced apart from the central magnetic portion 1111 to form a part of the first magnetic gap 113 and a part of the second magnetic gap 114. The number of intermediate magnetic groups can be two or more, and there is no limitation here. In this embodiment, there are two side magnetic circuits 112 , which are spaced apart on both sides of the central magnetic circuit 111 ; or, there are four side magnetic circuits 112 , which are arranged around the central magnetic circuit 111 .

[0049] According to one embodiment of the present invention, the vibration system 2 further includes multiple balancing diaphragms, each of which is disposed on the side of the edge yoke 122 facing away from the diaphragm 21. One end of each balancing diaphragm is connected to the edge yoke 122, and the other end of each balancing diaphragm is connected to the auxiliary voice coil 24. The multiple balancing diaphragms are evenly spaced along the circumference of the auxiliary voice coil 24, thereby balancing the auxiliary voice coil 24. The edge yoke 122 is provided with avoidance holes for the balancing diaphragms. The number of avoidance holes is the same as the number of balancing diaphragms, and they are arranged one-to-one. It should be noted that there are four balancing diaphragms, each of which is disposed at the four corners of the auxiliary voice coil 24.

[0050] In one embodiment, the intermediate magnetic portion includes a first intermediate magnetic portion 1112 and a second intermediate magnetic portion 1113, and the first intermediate magnetic portion 1112 and the second intermediate magnetic portion 1113 are respectively arranged on both sides of the central magnetic portion 1111 along the second direction, and the central magnetic portion 1111, the first intermediate magnetic portion 1112 and the side magnetic circuit 112 form a first magnetic gap 113, and the central magnetic portion 1111, the second intermediate magnetic portion 1113 and the side magnetic circuit 112 form a second magnetic gap 114. Among them, the first intermediate magnetic part 1112 and the central magnetic part 1111 form a part of the first magnetic gap 113, the second intermediate magnetic part 1113 and the central magnetic part 1111 form a part of the second magnetic gap 114, and the side magnetic circuit 112 is arranged on the periphery of the first intermediate magnetic part 1112, the central magnetic part 1111 and the second intermediate magnetic part 1113 and is spaced apart from the first intermediate magnetic part 1112, the central magnetic part 1111 and the second intermediate magnetic part 1113, thereby forming another part of the first magnetic gap 113 and another part of the second magnetic gap 114, ensuring that the first voice coil 22 and the second voice coil 23 have sufficient vibration space, and the vibration of the first voice coil 22 will not interfere with the second voice coil 23. In this embodiment, the side magnetic circuits 112 include two, and the two side magnetic circuits 112 are spaced apart on both sides of the first intermediate magnetic portion 1112 and the second intermediate magnetic portion 1113; or, the side magnetic circuits 112 include four, and the four side magnetic circuits are arranged around the periphery of the first intermediate magnetic portion 1112, the central magnetic portion 1111 and the second intermediate magnetic portion 1113.

[0051] See also Figures 3 to 5In one embodiment, the central magnetic portion 1111 includes a central magnet 11111 and a central magnetic conductive plate 11112 disposed on the side of the central magnet 11111 facing the diaphragm 21. The side magnetic circuit 112 includes a side magnet 1121 and a side magnetic conductive plate 1122 disposed on the side of the side magnet 1121 facing the diaphragm 21. The central magnet 11111 and the side magnet 1121 are magnetized along a first direction and have the same magnetization direction. The first intermediate magnetic portion 1112 includes a first magnet 11121 and a first magnetic conductive plate 111 disposed on the side of the first magnet 11121 facing the diaphragm 21. 22. The second intermediate magnetic portion 1113 includes a second magnet 11131 and a second magnetic conductive plate 11132 arranged on the side of the second magnet 11131 facing the diaphragm 21. The first magnet 11121 and the second magnet 11131 are magnetized along a first direction, and the magnetization directions are opposite to the magnetization direction of the center magnet 11111. The center magnetic conductive plate 11112, the first magnetic conductive plate 11122 and the side magnetic conductive plate 1122 form a first magnetic gap 113. The center magnetic conductive plate 11112, the second magnetic conductive plate 11132 and the side magnetic conductive plate 1122 form a second magnetic gap 114. By setting a central magnetic conductive plate 11112, a first magnetic conductive plate 11122, a second magnetic conductive plate 11132 and a side magnetic conductive plate 1122 for magnetic conduction, it is ensured that the first magnetic gap 113 and the second magnetic gap 114 have sufficient magnetic flux, thereby improving the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, and further improving the performance of the sound unit 100. It should be noted that the number of central magnetic conductive plates 11112 can be two or more, the number of central magnets 11111 is at least one, the number of first magnets 11121 is also at least one, the number of first magnetic conductive plates 11122 is at least one, the number of second magnets 11131 is at least one, the number of second magnetic conductive plates 11132 is at least one, and the number of central magnetic conductive yokes 121 is at least one. It should also be noted that please refer to Figure 5 The magnetization direction of the side magnet 1121 is downward, the magnetization direction of the first magnet 11121 is upward, and the current direction of the first voice coil 22 and the auxiliary voice coil 24 is as follows: Figure 5 As shown, the direction of the driving force on the diaphragm 21 generated at this time is upward.

[0052] According to one embodiment of the present invention, the central magnetic yoke 121 includes a first body 1211 and a first flange 1212. The first flange 1212 is bent from the outer periphery of the first body 1211 toward the diaphragm 21, and an avoidance groove for avoiding the first flange 1212 is provided on the side of the middle magnetic part facing the first flange 1212. Specifically, the first intermediate magnetic portion 1112 and the second intermediate magnetic portion 1113 are respectively provided with a first avoidance groove 11123 and a second avoidance groove 11133 for avoiding the first flange 1212 on the side facing the first flange 1212; by providing the first flange 1212, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and can also make the driving force trend of the auxiliary voice coil 24 on the diaphragm 21 flatter, thereby reducing the distortion of the sound unit 100; it should be noted that the first magnet 11121 is provided with a first avoidance groove 11123 corresponding to the first flange 1212, which not only avoids the interference between the first magnet 11121 and the first flange 1212, but also effectively reduces the thickness of the sound unit 100. Similarly, the second magnet 11131 is provided with a second avoidance groove 11133 corresponding to the first flange 1212, which not only avoids the interference between the second magnet 11131 and the first flange 1212, but also effectively reduces the thickness of the sound unit 100.

[0053] According to another embodiment of the present invention, the side magnetic yoke 122 includes a second body 1221 and a second flange 1222. The second flange 1222 bends from the inner periphery of the second body 1221 toward the diaphragm 21. A flange avoidance groove is provided on the side of the side magnetic circuit 112 facing the second flange 1222 for avoiding the second flange 1222. Specifically, a flange avoidance groove 11221 is provided on the side of the side magnet 1121 facing the second flange 1222 for avoiding the second flange 1222. By setting the second flange 1222, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and it can also make the driving force of the auxiliary voice coil 24 on the diaphragm 21 more flat, thereby reducing the distortion of the sound unit 100; it should be noted that the side magnet 1121 is provided with a flange avoidance groove 11221 corresponding to the second flange 1222, which avoids interference between the side magnet 1121 and the second flange 1222, and also reduces the thickness of the sound unit 100.

[0054] Please refer to Figure 9 , where curve a is the BL value curve of the sound unit 100, and curve b is the BL value curve of the traditional single-layer voice coil. Figure 9 The horizontal axis shown represents displacement, with a unit of mm, and the vertical axis represents BL, with a unit of Wb / m. Through the cooperation between the first flange 1212 and the second flange 1222, the driving force factor BL of the auxiliary voice coil 24 can be further improved, and the driving force trend of the auxiliary voice coil 24 on the diaphragm 21 can be made flatter, thereby reducing the distortion of the sound unit 100.

[0055] See also Figure 4 and Figure 5 According to one embodiment of the present invention, the speaker 100 further includes a back cover 3. The center magnetic yoke 121 and the side magnetic yoke 122 are both disposed on the back cover 3 on the side facing away from the diaphragm 21. The back cover 3 protrudes away from the diaphragm 21 to form an annular avoidance groove 31. The notch of the annular avoidance groove 31 faces and communicates with the auxiliary magnetic gap 123. The annular avoidance groove 31 is used to provide clearance for the auxiliary voice coil 24. The back cover 3 secures the center magnetic yoke 121 and the side magnetic yoke 122, allowing the center magnetic circuit 111 and the side magnetic circuit 112 to be connected through the back cover 3. Forming the annular avoidance groove 31 on the back cover 3 provides clearance for the auxiliary voice coil 24, providing ample downward vibration space for the auxiliary voice coil 24 and effectively improving the performance of the speaker 100. It should be noted that the back cover 3 is made of metal.

[0056] According to another embodiment of the present invention, a leakage hole 1223 is provided on the side guide yoke 122, and an isolation mesh hole 32 corresponding to and connected to the leakage hole 1223 is provided on the back cover 3; by providing the isolation mesh hole 32 on the back cover 3 to connect with the leakage hole 1223, the air pressure is balanced.

[0057] According to another embodiment of the present invention, the side yoke 122 is an annular side yoke. The annular side yoke surrounds the periphery of the central yoke 121 and is spaced apart from the central yoke 121 to form an auxiliary magnetic gap 123, which helps ensure that the auxiliary magnetic gap 123 has sufficient magnetic flux.

[0058] Figure 4 、 Figures 6 to 8In one embodiment, the sound unit 100 also includes a shell 4, the connecting assembly 25 includes a centering support 251 and a rigid connector 252, the vibration system 2 and the magnetic circuit system 1 are respectively connected to the two ends of the shell 4, the outer periphery of the diaphragm 21 is connected to the shell 4, the centering support 251 includes a fixing portion 2511, a mounting portion 2512 and an elastic arm portion 2513 connecting the fixing portion 2511 and the mounting portion 2512, one side of the fixing portion 2511 is connected to the first voice coil 22 and the second voice coil 23, the other side of the fixing portion 2511 is connected to the rigid connector 252, the mounting portion 2512 is connected to the shell 4, and the side of the rigid connector 252 facing away from the fixing portion 2511 is connected to the auxiliary voice coil 24. The centering support 251 serves to center and support the first and second voice coils 22 and 23, preventing polarization of the first and second voice coils 22 and 23 and improving the vibration stability of the first and second voice coils 22 and 23. Since the first and second voice coils 22 and 23 are connected to the auxiliary voice coil 24 via a rigid connector 252, the centering support 251 also serves to center and support the auxiliary voice coil 24, preventing polarization of the auxiliary voice coil 24 and improving the vibration stability of the auxiliary voice coil 24. It should be noted that the side magnet 1121 includes a plurality of side magnet blocks, which are spaced apart circumferentially along the center magnetic circuit 111, forming an escape space between any two adjacent side magnet blocks. The elastic arm portion 2513 is provided to correspond to the escape space to prevent interference between the centering support 251 and the side magnet 1121.

[0059] According to one embodiment of the present invention, multiple elastic arms 2513 are arranged at intervals along the circumference of the fixing portion 2511. The mounting portions 2512 are provided in equal numbers and in a one-to-one correspondence with the elastic arms 2513. The provision of multiple elastic arms 2513 and mounting portions 2512 further enhances the centering and supporting function of the centering support 251 for the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24.

[0060] According to another embodiment of the present invention, the side magnetic conductive plate 1122 is injection-molded on the housing 4 , and the side magnet 1121 is connected to the side magnetic conductive plate 1122 , which can improve the stability of the side magnet 1121 .

[0061] According to another embodiment of the present invention, a magnetic part is provided on the centering support plate 251, wherein the magnetic part can be made of permanent magnetic material, such as ferrite, precious metal alloy, etc.; the magnetic part can also be made of magnetic conductive material; the magnetic part can also be made of soft magnetic material, such as pure iron, nickel, etc.; wherein, the magnetic part will be affected by static magnetic force, thereby effectively improving the sensitivity of the sound unit.

[0062] See also Figures 3 to 5In one embodiment, the rigid connector 252 includes a connecting portion 2521 and a supporting portion 2522. The supporting portion 2522 is disposed on the side of the connecting portion 2521 facing the centering arm 251 and connected to the centering arm 251. The side of the connecting portion 2521 facing away from the supporting portion 2522 is connected to the auxiliary voice coil 24. The supporting portion 2522 extends along the vibration direction of the vibration system 2, thereby not only connecting the auxiliary voice coil 24 to the first voice coil 22 and the second voice coil 23 via the rigid connector 252, but also separating the auxiliary voice coil 24 from the first voice coil 22 and the second voice coil 23.

[0063] In one embodiment, the connecting portion 2521 is an annular connecting portion, and the supporting portions 2522 are arranged at intervals along the circumference of the connecting portion 2521. The provision of multiple supporting portions 2522 enhances the reliability and strength of the connection between the first and second voice coils 22, 23, and the auxiliary voice coil 24. According to one embodiment of the present invention, the connecting portion 2521 is an annular connecting portion, and the supporting portions 2522 are arranged at intervals along the circumference of the connecting portion 2521. The connecting portion 2521 is provided with grooves 25211, and the number of grooves 25211 matches the number of supporting portions 2522, and they are arranged in a one-to-one correspondence.

[0064] See also Figures 6 to 8 In one embodiment, the fixing portion 2511 is an annular fixing portion, and the centering support 251 further includes a first solder pad 2514, a second solder pad 2515, and a third solder pad 2516. The first solder pad 2514 and the second solder pad 2515 are respectively disposed on the side of the fixing portion 2511 facing the diaphragm 21. The first voice coil 22 is electrically connected to the first solder pad 2514, and the second voice coil 23 is electrically connected to the second solder pad 2515. The third solder pad 2516 is disposed on the side of the fixing portion 2511 facing away from the diaphragm 21, and the auxiliary voice coil 24 is electrically connected to the third solder pad 2516. The centering support 251 is a single integral structural component, providing greater support stability for the first and second voice coils 22 and 23. The use of the centering support 251 also facilitates wiring. The first solder pad 2514 is disposed on the side of the fixing portion 2511 facing the first voice coil 22, the second solder pad 2515 is disposed on the side of the fixing portion 2511 facing the second voice coil 23, and the third solder pad 2516 is disposed on the side of the fixing portion 2511 facing the auxiliary voice coil 24. By providing the first, second, and third solder pads 2514, 2515, and 2516 on the fixing portion 2511, compared to connecting the voice coils via a circuit board, the circuit board as a structural component is eliminated, thereby helping to reduce the thickness of the sound unit 100. It should be noted that there are two first solder pads 2514, two second solder pads 2515, and two third solder pads 2516. It should also be noted that the electrical connection between the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24 and the external circuit is achieved via the centering support 251.

[0065] According to one embodiment of the present invention, two centering supports 251 are provided, one on each side of the vibration system 2. The two centering supports 251 are arranged perpendicular to the second direction. The centering supports 251 also include a first soldering pad 2514, a second soldering pad 2515, and a third soldering pad 2516. The first soldering pad 2514 and the second soldering pad 2515 are respectively provided on the side of the fixing portion 2511 facing the diaphragm 21. The first voice coil 22 is electrically connected to the first soldering pad 2514, and the second voice coil 23 is electrically connected to the second soldering pad 2515. The third soldering pad 2516 is provided on the side of the fixing portion 2511 facing away from the diaphragm 21, and the auxiliary voice coil 24 is electrically connected to the third soldering pad 2516. The two centering supports 251 center and support the first and second voice coils 22 and 23, thereby preventing polarization of the first and second voice coils 22 and 23 and improving the vibration stability of the first and second voice coils 22 and 23. Compared to using an integral centering support plate, using two independent centering supports 251 eliminates the need for a connecting structure for connecting the two centering supports 251 , and therefore has lower costs.

[0066] The present invention also provides a sound module comprising a housing and a sound unit 100, which is disposed within the housing. The sound module can be a speaker module. The sound module can be used in electronic devices such as computers, mobile phones, and smart wearable devices. The specific structure of the sound unit 100 is similar to the above-mentioned embodiments. Since this sound module adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and will not be further elaborated here.

[0067] The above are merely exemplary embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings under the technical concept of the present invention, or direct / indirect application 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: include: A magnetic circuit system is formed with an auxiliary magnetic gap and a main magnetic gap arranged along a first direction, the main magnetic gap includes a first magnetic gap and a second magnetic gap arranged at intervals along a second direction, the second direction is perpendicular to the first direction, and the first magnetic gap and the second magnetic gap are both connected to the auxiliary magnetic gap; A vibration system that vibrates along the first direction, the vibration system comprising a diaphragm, a first voice coil, a second voice coil, an auxiliary voice coil, and a connecting assembly, wherein the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, and the auxiliary voice coil is located in the auxiliary magnetic gap. The first voice coil and the second voice coil are both connected to the auxiliary voice coil via the connecting assembly, and the sides of the first voice coil and the second voice coil away from the auxiliary voice coil are both connected to the diaphragm, and the current directions of the first voice coil and the second voice coil are opposite to the current direction of the auxiliary voice coil.

2. The sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system includes a magnetic circuit unit and a magnetic yoke unit. The magnetic yoke unit is arranged on the side of the magnetic circuit unit away from the diaphragm. The magnetic circuit unit forms the first magnetic gap and the second magnetic gap. The magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke arranged on the peripheral side of the central magnetic yoke. The auxiliary magnetic gap is formed between the side magnetic yoke and the central magnetic yoke.

3. The sound-emitting unit according to claim 2, characterized in that: The magnetic circuit unit includes a central magnetic circuit and a side magnetic circuit, the central magnetic yoke is arranged on the side of the central magnetic circuit away from the diaphragm, and the side magnetic yoke is arranged on the side of the side magnetic circuit away from the diaphragm; the central magnetic circuit includes a central magnetic part and an intermediate magnetic part arranged on the circumference of the central magnetic part, the central magnetic part, the intermediate magnetic part and the side magnetic circuit are all magnetized along the first direction, and the magnetization directions of the central magnetic part and the side magnetic circuit are opposite to the magnetization direction of the intermediate magnetic part, and the central magnetic part, the intermediate magnetic part and the side magnetic circuit enclose the first magnetic gap and the second magnetic gap.

4. The sound-emitting unit according to claim 3, characterized in that: The intermediate magnetic portion includes a first intermediate magnetic portion and a second intermediate magnetic portion, and the first intermediate magnetic portion and the second intermediate magnetic portion are respectively arranged on both sides of the central magnetic portion along the second direction. The central magnetic portion, the first intermediate magnetic portion and the side magnetic circuit form the first magnetic gap, and the central magnetic portion, the second intermediate magnetic portion and the side magnetic circuit form the second magnetic gap.

5. The sound-emitting unit according to claim 4, characterized in that: The central magnetic part includes a central magnet and a central magnetic conductive plate arranged on the side of the central magnet facing the diaphragm, the side magnetic circuit includes a side magnet and a side magnetic conductive plate arranged on the side of the side magnet facing the diaphragm, the central magnet and the side magnet are magnetized along the first direction and the magnetization directions are the same, the first intermediate magnetic part includes a first magnet and a first magnetic conductive plate arranged on the side of the first magnet facing the diaphragm, the second intermediate magnetic part includes a second magnet and a second magnetic conductive plate arranged on the side of the second magnet facing the diaphragm, the first magnet and the second magnet are magnetized along the first direction and the magnetization directions are opposite to the magnetization direction of the central magnet, the central magnetic conductive plate, the first magnetic conductive plate and the side magnetic conductive plate form the first magnetic gap, and the central magnetic conductive plate, the second magnetic conductive plate and the side magnetic conductive plate form the second magnetic gap.

6. The sound-emitting unit according to claim 3, characterized in that: The central magnetic yoke includes a first body and a first flange, wherein the first flange is bent from the outer periphery of the first body toward the diaphragm, and a side of the intermediate magnetic portion facing the first flange is provided with an avoidance groove for avoiding the first flange; and / or, The side magnetic yoke includes a second body and a second flange, the second flange is bent from the inner periphery of the second body toward the diaphragm, and a flange avoidance groove for avoiding the second flange is provided on the side of the side magnetic circuit facing the second flange.

7. The sound-emitting unit according to any one of claims 2 to 6, characterized in that: The sound unit further includes a rear cover, the central magnetic yoke and the side magnetic yoke are both provided on the rear cover on a side facing away from the diaphragm, the rear cover protrudes in a direction away from the diaphragm to form an annular avoidance groove, the notch of the annular avoidance groove is arranged toward the auxiliary magnetic gap and communicates with the auxiliary magnetic gap, and the annular avoidance groove is used to avoid the auxiliary voice coil; And / or, a leakage hole is provided on the side magnetic yoke, and an isolation mesh hole correspondingly connected to the leakage hole is provided on the back cover; And / or, the edge magnetic yoke is an annular edge magnetic yoke.

8. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The sound unit also includes a shell, the connecting assembly includes a centering support and a rigid connector, the vibration system and the magnetic circuit system are respectively connected to the two ends of the shell, the outer periphery of the diaphragm is connected to the shell, the centering support includes a fixing portion, a mounting portion and an elastic arm portion connecting the fixing portion and the mounting portion, one side of the fixing portion is connected to the first voice coil and the second voice coil, the other side of the fixing portion is connected to the rigid connector, the mounting portion is connected to the shell, and the side of the rigid connector facing away from the fixing portion is connected to the auxiliary voice coil.

9. The sound-emitting unit according to claim 8, characterized in that: The rigid connector includes a connecting portion and a supporting portion. The supporting portion is provided on a side of the connecting portion facing the centering support and connected to the centering support. The side of the connecting portion facing away from the supporting portion is connected to the auxiliary voice coil.

10. The sound-emitting unit according to claim 9, characterized in that: The connecting portion is an annular connecting portion, and the number of the supporting portions is multiple, and the multiple supporting portions are arranged at intervals along the circumference of the annular connecting portion.

11. The sound-emitting unit according to claim 8, wherein: The fixing portion is an annular fixing portion, and the centering support further includes a first solder pad, a second solder pad, and a third solder pad. The first solder pad and the second solder pad are respectively arranged on a side of the annular fixing portion facing the diaphragm. The first voice coil is electrically connected to the first solder pad, the second voice coil is electrically connected to the second solder pad, and the third solder pad is arranged on a side of the annular fixing portion facing away from the diaphragm. The auxiliary voice coil is electrically connected to the third solder pad. Alternatively, the centering support includes two, and the two centering supports are respectively arranged on both sides of the vibration system, and the arrangement direction of the two centering supports is perpendicular to the second direction. The centering support also includes a first soldering pad, a second soldering pad and a third soldering pad, and the first soldering pad and the second soldering pad are respectively arranged on the side of the fixing portion facing the diaphragm, the first voice coil is electrically connected to the first soldering pad, the second voice coil is electrically connected to the second soldering pad, and the third soldering pad is arranged on the side of the fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third soldering pad.

12. A sound module, characterized in that: The sound module includes a housing and a sound unit according to any one of claims 1 to 11, and the sound unit is arranged in the housing.

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