Sound production monomer and sound production module

Abstract

The invention 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, a vibration system and an elastic support assembly, the magnetic circuit system forms an auxiliary magnetic gap and a main magnetic gap, and the main magnetic gap comprises a first magnetic gap and a second magnetic gap; the vibration system comprises a vibrating diaphragm, a voice coil assembly and a connecting assembly, the voice coil assembly comprises a first voice coil, a second voice coil and an auxiliary voice coil, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, the auxiliary voice coil is located in the auxiliary magnetic gap, and the first voice coil and the second voice coil are connected with the auxiliary voice coil through the connecting assembly. The current directions of the first voice coil and the second voice coil are opposite to the current direction of the auxiliary voice coil; the elastic supporting assembly is connected with the magnetic circuit system and the voice coil assembly, the magnetic circuit system is provided with an avoiding space corresponding to the elastic supporting assembly, the driving force directions of the first voice coil, the second voice coil and the auxiliary voice coil on the vibrating 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-generating monomer and a sound-generating module. Background Art

[0002] As smart products become thinner, the limited internal space poses a great challenge to the acoustic performance of speakers. If the size of the speaker is reduced, the performance of the speaker will be weakened, because the means of improving the performance of traditional speakers is usually to increase the volume of the magnet to obtain better performance, but the use of large-volume magnets will cause the size of the speaker to increase, resulting in the speaker being unable to meet the 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 object, the sound-emitting unit proposed in the present invention comprises:

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

[0006] A vibration system, wherein the vibration system vibrates along the first direction, the vibration system comprises a diaphragm, a voice coil assembly and a connecting assembly, the voice coil assembly comprises a first voice coil, a second voice coil and an auxiliary voice coil, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, 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 through the connecting assembly, the first voice coil and the second voice coil are both connected to the diaphragm at a side away from the auxiliary voice coil, 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;

[0007] An elastic support component, one end of the elastic support component is connected to the magnetic circuit system, the other end of the elastic support component is connected to the voice coil component, and the magnetic circuit system is provided with an avoidance space corresponding to the elastic support component.

[0008] In one embodiment, the elastic support component includes a balancing diaphragm, one end of the balancing diaphragm is connected to the magnetic circuit system, and the other end of the balancing diaphragm is connected to the auxiliary voice coil.

[0009] In one embodiment, there are multiple balancing diaphragms, and the multiple balancing diaphragms are arranged at intervals along the circumference of the auxiliary voice coil.

[0010] In one embodiment, the elastic support assembly also includes a centering support plate, the sound unit also includes a shell, the vibration system and the magnetic circuit system are respectively arranged at both ends of the shell along the first direction, the outer periphery of the diaphragm is connected to the shell, the centering support plate includes a fixing part, a mounting part and an elastic arm part connecting the fixing part and the mounting part, the fixing part is connected to the first voice coil and the second voice coil, and the mounting part is connected to the shell.

[0011] In one embodiment, the fixing portion is an annular fixing portion, the centering support further includes a first pad, a second pad and a third pad, the first pad and the second 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 pad, the second voice coil is electrically connected to the second pad, the third pad is arranged on a side of the annular fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third pad;

[0012] Alternatively, the number of the centering supports is two, the two centering supports are respectively arranged on both sides of the vibration system, the arrangement direction of the two centering supports is perpendicular to the second direction, the centering support further includes a first soldering pad, a second soldering pad and a third soldering pad, the first soldering pad and the second soldering pad are respectively arranged on a 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, the third soldering pad is arranged on a side of the fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third soldering pad.

[0013] In one embodiment, the magnetic circuit system includes a magnetic plate unit, a magnet unit and a magnetic yoke unit, the magnetic yoke unit and the magnetic plate unit are respectively arranged on opposite sides of the magnet unit along the first direction, the magnetic plate unit forms the main magnetic gap, the magnetic yoke unit forms the auxiliary magnetic gap, and the magnet unit, the magnetic plate unit and the magnetic yoke unit are provided with the avoidance space.

[0014] In one embodiment, the magnet unit includes a central magnetic circuit and a side magnetic circuit arranged on the periphery of the central magnetic circuit, the central magnetic circuit and the side magnetic circuit are arranged at intervals, the magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke, the central magnetic yoke is connected to the central magnetic circuit, the side magnetic yoke is connected to the side magnetic circuit, and the auxiliary magnetic gap is formed between the central magnetic yoke and the side magnetic yoke; the magnetic plate unit includes a central magnetic plate and a side magnetic plate, the central magnetic plate is connected to the central magnetic circuit, the side magnetic plate is connected to the side magnetic circuit, and the side magnetic circuit, the side magnetic yoke and the side magnetic plate are provided with the avoidance space.

[0015] In one embodiment, the central magnetic circuit includes a central magnet, a first intermediate magnet and a second intermediate magnet, the central magnet, the first intermediate magnet and the second intermediate magnet are all arranged on the central magnetic yoke on the side facing away from the diaphragm, and the first intermediate magnet and the second intermediate magnet are respectively arranged on both sides of the central magnet along the second direction; the central magnetic plate includes an intermediate magnetic plate, a first magnetic plate and a second magnetic plate, the side magnetic circuit includes a side magnet, the side magnetic yoke is arranged on the side of the side magnet facing away from the diaphragm, the side magnetic plate is arranged on the side of the side magnet facing the diaphragm, the side of the central magnet facing the diaphragm is arranged on the intermediate magnetic plate, the first magnetic plate is arranged on the side of the first intermediate magnet facing the diaphragm, and the second magnetic plate is arranged on the side of the second intermediate magnet facing the diaphragm; the central magnet, the first intermediate magnet, the second intermediate magnet and the side magnet are all magnetized along the first direction, and the magnetization direction of the central magnet is the same as that of the side magnet, and the magnetization directions of the first intermediate magnet and the second intermediate magnet are opposite to the magnetization direction of the central magnet.

[0016] In one embodiment, the sound unit further includes a back cover, and the side of the magnetic circuit system facing away from the diaphragm is arranged on the back cover; a leakage hole is arranged on the side guide yoke, and an isolation mesh hole corresponding to and connected to the leakage hole is arranged on the back cover;

[0017] And / or, the two ends of the middle magnetic conductive plate along the third direction are connected to the side magnetic conductive plates.

[0018] In one embodiment, the sound-emitting unit further includes a back cover, and the side of the magnetic circuit system facing away from the diaphragm is arranged on the back cover;

[0019] 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 communicated with the auxiliary magnetic gap, and the annular avoidance groove is used to avoid the auxiliary voice coil;

[0020] And / or, the back cover protrudes in a direction away from the diaphragm to form an avoidance groove, the notch of the avoidance groove faces the elastic support component, and the avoidance groove is used to avoid the elastic support component.

[0021] In one embodiment, the connecting assembly includes a first rigid connector and a second rigid connector, one side of the first rigid connector is connected to the first voice coil, and the other side of the first rigid connector is connected to the auxiliary voice coil; one side of the second rigid connector is connected to the second voice coil, and the other side of the second rigid connector is connected to the auxiliary voice coil.

[0022] The present invention further provides 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 a 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 first voice coil and the second voice coil drive the diaphragm to vibrate, 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 obtains better performance improvement compared with the speaker with two voice coils arranged at intervals along the second direction, and by adding an elastic support component to connect the magnetic circuit system and the voice coil component respectively, it plays a role in balancing the voice coil component and improves the vibration stability of the voice coil component. 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 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.

[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 another perspective of an embodiment of a sound-emitting unit provided by the present invention;

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

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

[0030] Figure 6 A cross-sectional schematic diagram of a partial structure of an embodiment of a sound-emitting unit provided by the present invention;

[0031] Figure 7 A schematic structural diagram of an embodiment of a voice coil assembly and a centering support provided by the present invention;

[0032] Figure 8 A schematic structural diagram of another perspective of an embodiment of a voice coil assembly and a centering support provided by the present invention;

[0033] Fig. 9 This is a schematic diagram of the decomposed structure of another embodiment of the sound-emitting unit provided by the present invention.

[0034] Description of Figure Numbers:

[0035] 100, sound unit; 1, magnetic circuit system; 11, magnet unit; 111, center magnetic circuit; 1111, center magnet; 1112, first intermediate magnet; 1113, second intermediate magnet; 112, side magnetic circuit; 1121, side magnet; 11211, avoidance gap; 113, auxiliary magnetic gap; 114, avoidance space; 12, magnetic plate unit; 121, middle magnetic plate; 122, first magnetic plate; 123, second magnetic plate; 124, side magnetic plate; 125, first magnetic gap; 126, second magnetic gap; 13, magnetic yoke unit; 131, center magnetic yoke; 132, side magnetic plate Yoke; 1321, avoidance hole; 1322, leakage hole; 2, vibration system; 21, diaphragm; 211, reinforcement part; 22, first voice coil; 23, second voice coil; 24, auxiliary voice coil; 25, connection assembly; 251, first rigid connection piece; 252, second rigid connection piece; 3, elastic support assembly; 31, balancing diaphragm; 32, centering support plate; 321, fixing part; 322, mounting part; 323, elastic arm part; 324, first solder pad; 325, second solder pad; 326, third solder pad; 4, shell; 5, back cover; 51, annular avoidance groove; 52, isolation mesh; 53, avoidance groove.

[0036] 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

[0037] 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.

[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 in a certain specific posture. If the specific posture changes, the directional indication 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 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.

[0040] As smart products become thinner, the limited internal space poses a great challenge to the acoustic performance of speakers. If the size of the speaker is reduced, the performance of the speaker will be weakened, because the means of improving the performance of traditional speakers is usually to increase the volume of the magnet to obtain better performance, but the use of large-volume magnets will cause the size of the speaker to increase, resulting in the speaker being unable to meet the 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 Figure 1 , Figure 3 and Fig. 9In one embodiment of the present invention, the sound-emitting monomer 100 includes a magnetic circuit system 1, a vibration system 2 and an elastic support component 3. The magnetic circuit system 1 is formed with an auxiliary magnetic gap 113 and a main magnetic gap arranged along a first direction. The main magnetic gap includes a first magnetic gap 125 and a second magnetic gap 126 arranged at intervals along a second direction. The second direction is perpendicular to the first direction. The first magnetic gap 125 and the second magnetic gap 126 are both connected to the auxiliary magnetic gap 113. The vibration system 2 vibrates along the first direction. The vibration system 2 includes a diaphragm 21, a voice coil assembly and a connecting assembly 25. The voice coil assembly includes a first voice coil 22, a second voice coil 23 and an auxiliary voice coil 24. The first The voice coil 22 is located in the first magnetic gap 125, the second voice coil 23 is located in the second magnetic gap 126, and the auxiliary voice coil 24 is located in the auxiliary magnetic gap 113. 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 first voice coil 22 and the second voice coil 23 are connected to the diaphragm 21 on the side away from the auxiliary voice coil 24. 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. One end of the elastic support component 3 is connected to the magnetic circuit system 1, and the other end of the elastic support component 3 is connected to the voice coil component. The magnetic circuit system 1 is provided with an avoidance space 114 corresponding to the elastic support component 3.

[0043] 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.

[0044] The technical solution of the present invention drives the diaphragm 21 to vibrate by using the first voice coil 22 and the 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 directions generated are also the same. The first voice coil 22 and the second voice coil 23 drive the diaphragm 21 to vibrate, and the performance is better than that of 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 both the same as those of the auxiliary voice coil 24. The current direction is opposite to that of the auxiliary voice coil 24 arranged in the auxiliary magnetic gap 113, so that the auxiliary voice coil 24 arranged in the auxiliary magnetic gap 113 can also generate a driving force in the same direction as the first voice coil 22 and the second voice coil 23. The driving force cooperates with the driving forces 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 compared to the speaker with two voice coils arranged at intervals along the second direction. In addition, by adding an elastic support component 3 to respectively connect the magnetic circuit system 1 and the voice coil component, the voice coil component is balanced and the vibration stability of the voice coil component is improved.

[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 motion in the first magnetic gap 125 and the second magnetic gap 126, and the auxiliary voice coil 24 makes reciprocating cutting magnetic lines of force motion in the auxiliary magnetic gap 113, 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] In one embodiment, the elastic support component 3 includes a balancing diaphragm 31, one end of which is connected to the magnetic circuit system 1, and the other end of which is connected to the auxiliary voice coil 24. By providing the balancing diaphragm 31, the auxiliary voice coil 24 is balanced. Since the auxiliary voice coil 24 is connected to the first voice coil 22 and the second voice coil 23 through the connecting component 25, the additional balancing diaphragm 31 can also balance the first voice coil 22 and the second voice coil 23, thereby improving the stability of the sound unit 100. It should be noted that one end of the balancing diaphragm 31 is connected to the magnetic circuit system 1, and the other end of the balancing diaphragm 31 can be connected to the first voice coil 22, or the other end of the balancing diaphragm 31 can also be connected to the second voice coil 23. In other words, the balancing diaphragm 31 can be connected to any one of the voice coil components, or any two of them can be connected, or the first voice coil 22, the second voice coil 23 and the auxiliary voice coil 24 can all be connected to the balancing diaphragm 31, and no limitation is made here.

[0048] See also Figure 3 and Fig. 9 In one embodiment, the number of the balancing diaphragms 31 is multiple, and the multiple balancing diaphragms 31 are arranged at intervals along the circumference of the auxiliary voice coil 24. The multiple balancing diaphragms 31 are used to further improve the balancing effect of the balancing diaphragms 31 on the voice coil assembly, and further improve the stability of the sound unit 100. Specifically, the number of the balancing diaphragms 31 is two, and the two balancing diaphragms 31 are arranged diagonally on the auxiliary voice coil 24; the number of the balancing diaphragms 31 can also be four, and the four balancing diaphragms 31 are respectively arranged at the four corners of the auxiliary voice coil 24 to balance the auxiliary voice coil 24.

[0049] See also Figure 4 , Figure 7 and Figure 8In one embodiment, the elastic support assembly 3 also includes a centering support plate 32, the sound unit 100 also includes a shell 4, the vibration system 2 and the magnetic circuit system 1 are respectively arranged at both ends of the shell 4 along the first direction, the outer periphery of the diaphragm 21 is connected to the shell 4, the centering support plate 32 includes a fixing portion 321, a mounting portion 322 and an elastic arm portion 323 connecting the fixing portion 321 and the mounting portion 322, the fixing portion 321 is connected to the first voice coil 22 and the second voice coil 23, and the mounting portion 322 is connected to the shell 4. The centering support plate 32 plays a role in centering and supporting the first voice coil 22 and the second voice coil 23, preventing the first voice coil 22 and the second voice coil 23 from being polarized, and improving the vibration stability of the first voice coil 22 and the second voice coil 23. Since the first voice coil 22 and the second voice coil 23 are connected to the auxiliary voice coil 24 through the connecting component 25, the centering support plate 32 can also play a role in centering and supporting the auxiliary voice coil 24, preventing the auxiliary voice coil 24 from being polarized, and improving the vibration stability of the auxiliary voice coil 24.

[0050] According to an embodiment of the present invention, there are multiple elastic arms 323, which are arranged at intervals along the circumference of the fixing portion 321, and the number of the mounting portions 322 and the elastic arms 323 are the same and are arranged one by one. The arrangement of multiple elastic arms 323 and mounting portions 322 further strengthens the centering and supporting function of the centering support 32 on the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24.

[0051] According to an embodiment of the present invention, the fixing portion 321 is an annular fixing portion, and the centering support plate 32 further includes a first solder pad 324, a second solder pad 325 and a third solder pad 326. The first solder pad 324 and the second solder pad 325 are respectively arranged on the side of the annular fixing portion facing the diaphragm 21, the first voice coil 22 is electrically connected to the first solder pad 324, the second voice coil 23 is electrically connected to the second solder pad 325, the third solder pad 326 is arranged on the side of the annular fixing portion away from the diaphragm 21, and the auxiliary voice coil 24 is electrically connected to the third solder pad 326; the centering support plate 32 is an integral structural component, so it has better supporting stability for the first voice coil 22 and the second voice coil 23, and the use of the centering support plate 32 can also facilitate wiring. The first solder pad 324 is arranged on the side of the fixing part 321 facing the first voice coil 22, the second solder pad 325 is arranged on the side of the fixing part 321 facing the second voice coil 23, and the third solder pad 326 is arranged on the side of the fixing part 321 facing the auxiliary voice coil 24; by arranging the first solder pad 324, the second solder pad 325 and the third solder pad 326 on the fixing part 321, compared with connecting the voice coil by setting a circuit board, the circuit board as a structural component is omitted, which helps to reduce the thickness of the sound unit 100. It should be noted that the number of the first solder pad 324 is two, the number of the second solder pad 325 is also two, and the number of the third solder pad 326 is also two. 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 realized through the centering support plate 32.

[0052] According to another embodiment of the present invention, the number of centering supports 32 is two, and the two centering supports 32 are respectively arranged on both sides of the vibration system 2. The arrangement direction of the two centering supports 32 is perpendicular to the second direction. The centering supports 32 also include a first pad 324, a second pad 325 and a third pad 326. The first pad 324 and the second pad 325 are respectively arranged on the side of the fixing portion 321 facing the diaphragm 21. The first voice coil 22 is electrically connected to the first pad 324, the second voice coil 23 is electrically connected to the second pad 325, the third pad 326 is arranged on the side of the fixing portion 321 away from the diaphragm 21, and the auxiliary voice coil 24 is electrically connected to the third pad 326. By providing two centering supports 32, the first voice coil 22 and the second voice coil 23 are centered and supported, thereby preventing the first voice coil 22 and the second voice coil 23 from being polarized, and improving the vibration stability of the first voice coil 22 and the second voice coil 23. Compared with using an integral centering support plate 32 , using two independent centering support plates 32 eliminates the need for a connecting structure for connecting the two centering support plates 32 , and thus has lower costs.

[0053] See also Figures 2 to 4In one embodiment, the magnetic circuit system 1 includes a magnetic plate unit 12, a magnet unit 11 and a magnetic yoke unit 13. The magnetic yoke unit 13 and the magnetic plate unit 12 are respectively arranged on opposite sides of the magnet unit 11 along a first direction. The magnetic plate unit 12 forms a main magnetic gap, and the magnetic yoke unit 13 forms an auxiliary magnetic gap 113. The magnet unit 11, the magnetic plate unit 12 and the magnetic yoke unit 13 are provided with an avoidance space 114.

[0054] See also Figures 3 to 5 In one embodiment, the magnet unit 11 includes a central magnetic circuit 111 and a side magnetic circuit 112 arranged on the side of the central magnetic circuit 111, and the central magnetic circuit 111 and the side magnetic circuit 112 are arranged at intervals. The magnetic yoke unit 13 includes a central magnetic yoke 131 and a side magnetic yoke 132. The central magnetic yoke 131 is connected to the central magnetic circuit 111, and the side magnetic yoke 132 is connected to the side magnetic circuit 112. An auxiliary magnetic gap is formed between the central magnetic yoke 131 and the side magnetic yoke 132; the magnetic plate unit 12 includes a central magnetic plate and a side magnetic plate 124. The central magnetic plate is connected to the central magnetic circuit 111, and the side magnetic plate 124 is connected to the side magnetic circuit 112. The side magnetic circuit 112, the side magnetic yoke 132 and the side magnetic plate 124 are provided with an avoidance space 114.

[0055] In one embodiment, the side magnetic conductive plate 124 is connected to the housing 4, and the center magnetic conductive plate is connected to the side magnetic conductive plate 124 along a third direction, and the third direction is perpendicular to the first direction and the second direction. The two ends of the intermediate magnetic conductive plate 121 are connected to the side magnetic conductive plates 124 on the housing 4, and the center magnetic circuit 111 is arranged on the intermediate magnetic conductive plate 121, so that the side magnetic circuit 112, the center magnetic circuit 111, the center magnetic conductive yoke 131 and the side magnetic conductive yoke 132 can be connected to form a stable integral structure through the side magnetic conductive plate 124 and the intermediate magnetic conductive plate, thereby making it possible to eliminate or reduce the thickness of the sound unit 100 by thinning the traditional back cover. In addition, by setting the intermediate magnetic conductive plate 121, the first magnetic conductive plate 122 and the side magnetic conductive plate 124 for magnetic conduction, it is ensured that the first magnetic gap 125 has sufficient magnetic flux, and by setting the intermediate magnetic conductive plate 121, the second magnetic conductive plate 123 and the side magnetic conductive plate 124 for magnetic conduction, it is ensured that the second magnetic gap 126 has sufficient magnetic flux. It should be noted that the number of the side magnetic conductive plates 124 can be one or more, and there is no limitation here. Similarly, the number of the middle magnetic conductive plates 121, the first magnetic conductive plates 122, and the second magnetic conductive plates 123 can also be one or more. Figure 4 The up and down directions shown, the second direction is Figure 4 The left and right directions shown, the third direction is Figure 4 Front-to-back orientation shown.

[0056] According to an embodiment of the present invention, the central magnetic yoke 131 includes a first body and a first flange, the first flange is bent from the outer periphery of the first body toward the direction of the diaphragm 21, and a side of the intermediate magnetic portion facing the first flange is provided with a shunting groove 53 for avoiding the first flange. Specifically, the first intermediate magnetic steel and the second intermediate magnetic steel are respectively provided with a first shunting groove 53 and a second shunting groove 53 for avoiding the first flange on one side facing the first flange; by providing the first flange, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and it 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-generating monomer 100; it should be noted that the first magnet is provided with a first shunting groove 53 corresponding to the first flange, which not only avoids the interference between the first magnet and the first flange, but also effectively reduces the thickness of the sound-generating monomer 100. Similarly, the second magnet is provided with a second shunting groove 53 corresponding to the first flange, which not only avoids the interference between the second magnet and the first flange, but also effectively reduces the thickness of the sound-generating monomer 100.

[0057] According to another embodiment of the present invention, the side magnetic yoke 132 includes a second body and a second flange, the second flange is bent from the inner periphery of the second body toward the direction of the diaphragm 21, and a flange avoidance groove 53 for avoiding the second flange is provided on the side of the side magnetic circuit 112 facing the second flange. Specifically, a flange avoidance groove 53 for avoiding the second flange is provided on the side of the side magnet 1121 facing the second flange. By providing the second flange, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and it 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-generating unit 100; it should be noted that the side magnet 1121 is provided with a flange avoidance groove 53 corresponding to the second flange, which avoids the interference between the side magnet 1121 and the second flange, and also reduces the thickness of the sound-generating unit 100.

[0058] See also Figures 4 to 6In one embodiment, the central magnetic circuit 111 includes a central magnet 1111, a first intermediate magnet 1112, and a second intermediate magnet 1113. The central magnet 1111, the first intermediate magnet 1112, and the second intermediate magnet 1113 are all arranged on the central magnetic yoke 131 on the side away from the diaphragm 21. The first intermediate magnet 1112 and the second intermediate magnet 1113 are respectively arranged on both sides of the central magnet 1111 along the second direction; the central magnetic plate includes an intermediate magnetic plate 121, a first magnetic plate 122, and a second magnetic plate 123. The side magnetic circuit 112 includes a side magnet 1121. The side magnetic yoke 132 is arranged on the side of the side magnet 1121 away from the diaphragm 21. The side magnetic plate 124 is arranged The side of the side magnet 1121 facing the diaphragm 21 and the side of the center magnet 1111 facing the diaphragm 21 are arranged on the middle magnetic conductive plate 121, the first magnetic conductive plate 122 is arranged on the side of the first middle magnet 1112 facing the diaphragm 21, and the second magnetic conductive plate 123 is arranged on the side of the second middle magnet 1113 facing the diaphragm 21; the center magnet 1111, the first middle magnet 1112, the second middle magnet 1113 and the side magnet 1121 are all magnetized along the first direction, and the magnetization direction of the center magnet 1111 is the same as the magnetization direction of the side magnet 1121, and the magnetization directions of the first middle magnet 1112 and the second middle magnet 1113 are opposite to the magnetization direction of the center magnet 1111.

[0059] In one embodiment, the intermediate magnetic conductive plate 121 is connected to the side magnetic conductive plate 124 along a third direction, wherein the center magnet 1111 is arranged on the intermediate magnetic conductive plate 121, and the center magnet 1111, the first intermediate magnet 1112 and the second intermediate magnet 1113 are arranged on the side away from the diaphragm 21 on the center magnetic conductive yoke 131, so that the intermediate magnetic conductive plate 121 can support the center magnetic circuit 111, so that the side magnetic circuit 112, the center magnetic circuit 111 and the center magnetic conductive yoke 131 and the side magnetic conductive yoke 132 can be connected into a stable integral structure through the side magnetic conductive plate 124 and the intermediate magnetic conductive plate 121, thereby making it possible to reduce the thickness of the sound unit 100 by eliminating or thinning the traditional back cover.

[0060] According to an embodiment of the present invention, the magnetic circuit system 1 also includes a magnetic component, which is arranged in the connecting component 25. The magnetic component is located between the middle magnetic conductive plate 121 and the central magnetic conductive yoke 131. The magnetic component will be affected by the static magnetic force. When the position of the magnetic component is a balanced position, the static magnetic force on the magnetic component is zero. At this time, taking the first voice coil 22 as an example, if the first voice coil 22 vibrates upward from the balanced position, the magnetic component moves upward with the voice coil. At this time, the resultant force of the static magnetic force on the magnetic component is upward, and the direction of the resultant force of the static magnetic force on the magnetic component is consistent with the vibration direction of the first voice coil 22, thereby effectively increasing the driving force of the first voice coil 22 on the diaphragm 21, and improving the performance of the sound unit 100. Since the first voice coil 22 and the second voice coil 23 are both connected The second voice coil 23 and the auxiliary voice coil 24 are connected to the auxiliary voice coil 24 through the connecting component 25, so the driving force of the second voice coil 23 and the auxiliary voice coil 24 on the diaphragm 21 is also increased; similarly, taking the first voice coil 22 as an example, if the first voice coil 22 vibrates downward from the equilibrium position, the magnetic part moves downward together with the first voice coil 22, and the direction of the resultant force of the static magnetic force on the magnetic part is downward, and the direction of the resultant force of the static magnetic force on the magnetic part is consistent with the vibration direction of the first voice coil 22, which also effectively increases the driving force of the first voice coil 22 on the diaphragm 21 and improves the performance of the sound unit 100. Since 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 driving force of the second voice coil 23 and the auxiliary voice coil 24 on the diaphragm 21 is also increased. It should be noted that the magnetic part can be a permanent magnetic material, such as ferrite, precious metal alloy, etc.; the magnetic part can also be a magnetic conductive material; the magnetic part can also be a soft magnetic material, such as pure iron, nickel, etc. It should also be noted that the number of magnetic components can be one or more, and there is no limitation here. When the number of magnetic components is two, the two magnetic components are respectively arranged corresponding to the first voice coil 22 and the second voice coil 23.

[0061] According to one embodiment of the present invention, the centering support plate 32 is provided with a support plate magnetic component, wherein the support plate magnetic component can be a component made of a permanent magnetic material, such as ferrite, precious metal alloy, etc.; the support plate magnetic component can also be a component made of a magnetic conductive material; the support plate magnetic component can also be a component made of a soft magnetic material, such as pure iron, nickel, etc.; wherein the support plate magnetic component will be affected by a static magnetic force, and the resultant force of the static magnetic force on the support plate magnetic component when it is in a balanced position is zero. When the first voice coil 22 and the second voice coil 23 vibrate upward from the balanced position, the direction of the resultant force of the static magnetic force on the support plate magnetic component is also upward, and the force will act on the first voice coil 22 and the second voice coil 23 through the centering support plate 32. Since the direction of the resultant force of the static magnetic force on the support plate magnetic component is the same as that of the first voice coil 22 and the second voice coil 23, the direction of the resultant force of the static magnetic force on the support plate magnetic component is the same as that of the first voice coil 22 and the second voice coil 23. The vibration directions of the first voice coil 22 and the second voice coil 23 are consistent, thereby effectively increasing the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, thereby effectively improving the sensitivity of the sound unit 100; similarly, when the first voice coil 22 and the second voice coil 23 vibrate downward from the equilibrium position, the direction of the resultant force of the static magnetic force on the support magnetic part is also downward, and this force will act on the first voice coil 22 and the second voice coil 23 through the centering support 32. Since the direction of the resultant force of the static magnetic force on the support magnetic part is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21 is effectively increased, thereby effectively improving the sensitivity of the sound unit 100.

[0062] See also Figure 3 , Figure 4 and Fig. 9 In one embodiment, the sound unit 100 further includes a back cover 5, and the side of the magnetic circuit system 1 facing away from the diaphragm 21 is arranged on the back cover 5; the side guide yoke 132 is provided with a leakage hole 1322, and the back cover 5 is provided with an isolation mesh hole 52 corresponding to and connected with the leakage hole 1322. By providing the isolation mesh hole 52 on the back cover 5 to communicate with the leakage hole 1322, the air pressure is balanced. It can be understood that the leakage hole 1322 can also be formed between the side guide yoke 132 and the shell, and the shape of the back cover 5 can be changed as needed.

[0063] According to an embodiment of the present invention, the sound unit 100 further includes a back cover 5, and the side of the magnetic circuit system 1 away from the diaphragm 21 is arranged on the back cover 5; the back cover 5 protrudes in the direction away from the diaphragm 21 to form an annular avoidance groove 51, the notch of the annular avoidance groove 51 is arranged toward the auxiliary magnetic gap 113 and communicates with the auxiliary magnetic gap 113, and the annular avoidance groove 51 is used to avoid the auxiliary voice coil 24; the central magnetic yoke 131 and the side magnetic yoke 132 are fixed by setting the back cover 5, so that the central magnetic circuit 111 and the side magnetic circuit 112 can be connected together through the back cover 5. By forming the annular avoidance groove 51 on the back cover 5 to avoid the auxiliary voice coil 24, sufficient downward vibration space is provided for the auxiliary voice coil 24, and the performance of the sound unit 100 is effectively improved. It should be noted that the back cover 5 is a metal back cover.

[0064] According to another embodiment of the present invention, the sound unit 100 further includes a back cover 5, and the side of the magnetic circuit system 1 away from the diaphragm 21 is arranged on the back cover 5; the back cover 5 protrudes in the direction away from the diaphragm 21 to form an avoidance groove 53, and the notch of the avoidance groove 53 faces the elastic support component 3, and the avoidance groove 53 is used to avoid the elastic support component 3. Specifically, the side magnetic yoke 132 is provided with an avoidance hole 1321 corresponding to the balance diaphragm 31, and the side magnet 1121 includes a plurality of side magnet blocks arranged at intervals, and an avoidance gap 11211 is formed between two adjacent side magnet blocks, and the avoidance gap 11211 is connected with the avoidance hole 1321 to form an avoidance space 114, so as to avoid the balance diaphragm 31 and the centering support piece 32 from interfering with the sound of the magnetic circuit system 1.

[0065] See also Figure 3 , Figure 7 and Figure 8 In one embodiment, the connection assembly 25 includes a first rigid connection member 251 and a second rigid connection member 252. One side of the first rigid connection member 251 is connected to the first voice coil 22, and the other side of the first rigid connection member 251 is connected to the auxiliary voice coil 24. One side of the second rigid connection member 252 is connected to the second voice coil 23, and the other side of the second rigid connection member 252 is connected to the auxiliary voice coil 24. Compared with connecting the first voice coil 22 and the second voice coil 23 on one side of an integral structural member and connecting the third voice coil on the other side, the use of the first rigid connection member 251 and the second rigid connection member 252 as two independent structural members eliminates the connection structure for the first rigid connection member 251 and the second rigid connection member 252, so the cost is lower.

[0066] The present invention also proposes a sound module, which includes a housing and a sound unit 100, wherein the sound unit 100 is disposed in the housing, and the sound module can be a speaker module. The sound module can be applied to electronic devices such as computers, mobile phones, and smart wearable devices. The specific structure of the sound unit 100 refers to the above embodiment. Since the present sound module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0067] 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: include: A magnetic circuit system, wherein the magnetic circuit system is formed with an auxiliary magnetic gap and a main magnetic gap arranged along a first direction, wherein the main magnetic gap includes a first magnetic gap and a second magnetic gap arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction, and both the first magnetic gap and the second magnetic gap are connected to the auxiliary magnetic gap; A vibration system, wherein the vibration system vibrates along the first direction, the vibration system comprises a diaphragm, a voice coil assembly and a connecting assembly, the voice coil assembly comprises a first voice coil, a second voice coil and an auxiliary voice coil, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, 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 through the connecting assembly, the first voice coil and the second voice coil are both connected to the diaphragm at a side away from the auxiliary voice coil, 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; An elastic support component, one end of the elastic support component is connected to the magnetic circuit system, the other end of the elastic support component is connected to the voice coil component, and the magnetic circuit system is provided with an avoidance space corresponding to the elastic support component.

2. The sound-emitting unit according to claim 1, characterized in that: The elastic support component includes a balancing diaphragm, one end of the balancing diaphragm is connected to the magnetic circuit system, and the other end of the balancing diaphragm is connected to the auxiliary voice coil.

3. The sound-emitting unit according to claim 2, characterized in that: There are multiple balancing diaphragms, and the multiple balancing diaphragms are arranged at intervals along the circumference of the auxiliary voice coil.

4. The sound-emitting unit according to claim 2, characterized in that: The elastic support assembly also includes a centering support plate, the sound unit also includes a shell, the vibration system and the magnetic circuit system are respectively arranged at two ends of the shell along the first direction, the outer periphery of the diaphragm is connected to the shell, the centering support plate includes a fixing portion, a mounting portion and an elastic arm portion connecting the fixing portion and the mounting portion, the fixing portion is connected to the first voice coil and the second voice coil, and the mounting portion is connected to the shell.

5. The sound-emitting unit according to claim 4, characterized in that: The fixing portion is an annular fixing portion, the centering support further includes a first pad, a second pad and a third pad, the first pad and the second 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 pad, the second voice coil is electrically connected to the second pad, the third pad is arranged on a side of the annular fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third pad; Alternatively, the number of the centering supports is two, the two centering supports are respectively arranged on both sides of the vibration system, the arrangement direction of the two centering supports is perpendicular to the second direction, the centering support further includes a first soldering pad, a second soldering pad and a third soldering pad, the first soldering pad and the second soldering pad are respectively arranged on a 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, the third soldering pad is arranged on a side of the fixing portion away from the diaphragm, and the auxiliary voice coil is electrically connected to the third soldering pad.

6. The sound-emitting unit according to any one of claims 1 to 5, characterized in that: The magnetic circuit system includes a magnetic plate unit, a magnet unit and a magnetic yoke unit, the magnetic yoke unit and the magnetic plate unit are respectively arranged on opposite sides of the magnet unit along the first direction, the magnetic plate unit forms the main magnetic gap, the magnetic yoke unit forms the auxiliary magnetic gap, and the magnet unit, the magnetic plate unit and the magnetic yoke unit are provided with the avoidance space.

7. The sound-emitting unit according to claim 6, characterized in that: The magnet unit includes a central magnetic circuit and a side magnetic circuit arranged on the circumferential side of the central magnetic circuit, the central magnetic circuit and the side magnetic circuit are arranged at intervals, the magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke, the central magnetic yoke is connected to the central magnetic circuit, the side magnetic yoke is connected to the side magnetic circuit, and the auxiliary magnetic gap is formed between the central magnetic yoke and the side magnetic yoke; the magnetic plate unit includes a central magnetic plate and a side magnetic plate, the central magnetic plate is connected to the central magnetic circuit, the side magnetic plate is connected to the side magnetic circuit, and the side magnetic circuit, the side magnetic yoke and the side magnetic plate are provided with the avoidance space.

8. The sound-emitting unit according to claim 7, characterized in that: The central magnetic circuit includes a central magnet, a first intermediate magnet and a second intermediate magnet, the central magnet, the first intermediate magnet and the second intermediate magnet are all arranged on the central magnetic yoke on the side away from the diaphragm, and the first intermediate magnet and the second intermediate magnet are respectively arranged on both sides of the central magnet along the second direction; the central magnetic plate includes an intermediate magnetic plate, a first magnetic plate and a second magnetic plate, the side magnetic circuit includes a side magnet, the side magnetic yoke is arranged on the side of the side magnet away from the diaphragm, the side magnetic plate is arranged on the side of the side magnet facing the diaphragm, the side of the central magnet facing the diaphragm is arranged on the intermediate magnetic plate, the first magnetic plate is arranged on the side of the first intermediate magnet facing the diaphragm, and the second magnetic plate is arranged on the side of the second intermediate magnet facing the diaphragm; the central magnet, the first intermediate magnet, the second intermediate magnet and the side magnet are all magnetized along the first direction, and the magnetization direction of the central magnet is the same as that of the side magnet, and the magnetization directions of the first intermediate magnet and the second intermediate magnet are opposite to the magnetization direction of the central magnet.

9. The sound-emitting unit according to claim 7, characterized in that: The sound-emitting unit further comprises a back cover, and the side of the magnetic circuit system facing away from the diaphragm is arranged on the back cover; a leakage hole is arranged on the side magnetic yoke, and an isolation mesh hole corresponding to and connected to the leakage hole is arranged on the back cover; And / or, the two ends of the middle magnetic conductive plate along the third direction are connected to the side magnetic conductive plates.

10. The sound-emitting unit according to any one of claims 1 to 5, characterized in that: The sound-emitting unit further comprises a rear cover, and a side of the magnetic circuit system facing away from the diaphragm is arranged on the rear cover; 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 communicated with the auxiliary magnetic gap, and the annular avoidance groove is used to avoid the auxiliary voice coil; And / or, the back cover protrudes in a direction away from the diaphragm to form an avoidance groove, the notch of the avoidance groove faces the elastic support component, and the avoidance groove is used to avoid the elastic support component.

11. The sound-emitting unit according to any one of claims 1 to 5, characterized in that: The connecting component includes a first rigid connecting member and a second rigid connecting member, one side of the first rigid connecting member is connected to the first voice coil, and the other side of the first rigid connecting member is connected to the auxiliary voice coil; one side of the second rigid connecting member is connected to the second voice coil, and the other side of the second rigid connecting member is connected to the auxiliary voice coil.

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

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