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, a vibration system and a shell. The magnetic circuit system comprises a magnetic yoke unit, a magnet unit and a magnetic plate unit. The magnetic plate unit forms a main magnetic gap. The magnet unit forms an auxiliary magnetic gap. The main magnetic gap comprises a first magnetic gap and a second magnetic gap. 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 and the second voice coil are connected with the auxiliary voice coil through the connecting assembly. The vibration system and the magnetic circuit system are arranged at two ends of the shell along a first direction. The outer periphery of the diaphragm is connected with the shell. The magnet unit is arranged on the magnetic plate unit on the side facing the diaphragm. The magnet unit and the magnetic yoke unit are connected with the shell through the magnetic plate unit. The magnetic plate unit can replace the traditional back cover to support the magnet unit, so that the thickness of the loudspeaker is reduced.

Description

Technical Field

[0001] This invention relates to the field of sound energy conversion technology, and in particular to a sound-generating unit and a sound-generating module. Background Technology

[0002] The trend towards thinner and smaller smart products presents a significant challenge to the acoustic performance of loudspeakers due to the limited internal space. Existing loudspeakers typically have their magnetic circuit systems fixed to a metal back cover, which supports the magnetic circuit system. Therefore, the thickness of the metal back cover directly affects the stability of the support for the magnetic circuit system. Reducing the thickness of the metal back cover may lead to a decrease in the stability of the support for the magnetic circuit system, thereby affecting the performance of the loudspeaker. Therefore, it is not possible to directly reduce the thickness of the loudspeaker by thinning the metal back cover. Summary of the Invention

[0003] The main objective of this invention is to propose a sound-generating unit and a sound-generating module, aiming to solve the problem of how to reduce the thickness of a loudspeaker.

[0004] To achieve the above objectives, the present invention provides a sound-generating unit comprising:

[0005] A magnetic circuit system, comprising a magnetic yoke unit, a magnet unit, and a magnetic plate unit, wherein the magnetic yoke unit and the magnetic plate unit are respectively disposed on opposite sides of the magnet unit along a first direction, the magnetic plate unit forms a main magnetic gap, and the magnetic yoke unit forms an auxiliary magnetic gap, wherein the main magnetic gap includes a first magnetic gap and a second magnetic gap spaced apart along a second direction, both the first magnetic gap and the second magnetic gap being connected to the auxiliary magnetic gap, and the first direction and the second direction being perpendicular to each other;

[0006] A vibration system that vibrates along a first direction includes 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 a first magnetic gap, the second voice coil is located in a second magnetic gap, and the auxiliary voice coil is located in an auxiliary magnetic gap. Both the first and second voice coils are connected to the auxiliary voice coil via the connecting assembly. The sides of both the first and second voice coils away from the auxiliary voice coil are connected to the diaphragm. 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] The housing, the vibration system and the magnetic circuit system are respectively disposed at both ends of the housing along the first direction, the outer periphery of the diaphragm is connected to the housing, the magnet unit is disposed on the side facing the diaphragm on the magnetic guide plate unit, the magnetic guide plate unit is connected to the housing, and the magnet unit and the magnetic guide yoke unit are connected to the housing through the magnetic guide plate unit.

[0008] In one embodiment, the magnet unit includes a central magnetic circuit and side magnetic circuits disposed around the central magnetic circuit, the central magnetic circuit and the side magnetic circuits being spaced apart; the magnetic yoke unit includes a central magnetic yoke and side magnetic yokes, the central magnetic yoke being connected to the central magnetic circuit, the side magnetic yokes being connected to the side magnetic circuits, and an auxiliary magnetic gap being formed between the central magnetic yoke and the side magnetic yokes; the magnetic plate unit includes a central magnetic plate and side magnetic plates, the central magnetic plate being connected to the central magnetic circuit, and the side magnetic plates being connected to the side magnetic circuits, wherein...

[0009] The side magnetic plate is connected to the housing, and the central magnetic plate is connected to the side magnetic plate along a third direction, which is perpendicular to the first direction and the second direction.

[0010] 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 disposed on the side of the magnetic yoke away from the diaphragm. The first intermediate magnet and the second intermediate magnet are respectively disposed 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 side magnets. The side magnetic yoke is disposed on the side of the side magnet away from the diaphragm, and the side magnetic plate is disposed on the side of the side magnet facing the diaphragm. A central magnet is disposed on the side of the diaphragm facing the middle magnetic plate. The middle magnetic plate is connected to the side magnetic plate along the third direction. The first magnetic plate is disposed on the side of the first middle magnet facing the diaphragm, and the second magnetic plate is disposed on the side of the second middle magnet facing the diaphragm. The central magnet, the first middle magnet, the second middle magnet, and the side magnets are all magnetized along the first direction, and the magnetization direction of the central magnet is the same as that of the side magnets. The magnetization directions of the first middle magnet and the second middle magnet are opposite to that of the central magnet.

[0011] In one embodiment, the magnet unit includes a central magnetic circuit and side magnetic circuits disposed around the central magnetic circuit, the central magnetic circuit and the side magnetic circuits being spaced apart; the magnetic yoke unit includes a central magnetic yoke and side magnetic yokes, the central magnetic yoke being connected to the central magnetic circuit, the side magnetic yokes being connected to the side magnetic circuits, and an auxiliary magnetic gap being formed between the central magnetic yoke and the side magnetic yokes; the magnetic plate unit includes a central magnetic plate and side magnetic plates, the central magnetic plate being connected to the central magnetic circuit, and the side magnetic plates being connected to the side magnetic circuits, wherein...

[0012] The side magnetic plate is connected to the housing, and the center magnetic plate is connected to the housing along a third direction, which is perpendicular to the first direction and the second direction.

[0013] In one embodiment, the side magnetic plate is injection molded into the housing.

[0014] In one embodiment, the central magnetic yoke includes a first body and a first flange. The first flange bends from the outer periphery of the first body toward the diaphragm. The first intermediate magnet and the second intermediate magnet are respectively provided with a first clearance groove and a second clearance groove on the side facing the first flange to avoid the first flange.

[0015] And / or,

[0016] The side-guided magnetic yoke includes a second body and a second flange. The second flange bends from the inner periphery of the second body toward the diaphragm. The side magnet is provided with a flange avoidance groove on the side facing the second flange to avoid the second flange.

[0017] In one embodiment, the sound-generating unit further includes a back cover, and the side of the magnet unit facing away from the diaphragm is disposed on the back cover;

[0018] The rear cover protrudes away from the diaphragm to form an annular clearance groove. The opening of the annular clearance groove is positioned facing the auxiliary magnetic gap and is connected to the auxiliary magnetic gap. The annular clearance groove is used to avoid the auxiliary voice coil.

[0019] And / or,

[0020] The back cover is a thin metal sheet.

[0021] In one embodiment, the connecting assembly includes an elastic support and a rigid connector. One end of the elastic support is connected to the housing. The sides of the first and second voice coils facing away from the diaphragm are both connected to the other end of the elastic support. One end of the rigid connector is connected to the side of the elastic support facing away from the first and second voice coils. The other end of the rigid connector is connected to the auxiliary voice coil.

[0022] In one embodiment, the elastic support includes an annular fixing part, a mounting part, and a spring arm part connecting the annular fixing part and the mounting part. The mounting part is connected to the housing, and the first voice coil and the second voice coil are both connected to the annular fixing part.

[0023] Alternatively, the elastic support includes a first centering support and a second centering support, and the rigid connector includes a first rigid connector and a second rigid connector. Both ends of the first centering support are connected to the housing, one side of the first centering support is connected to the first voice coil, and the other side of the first centering support is connected to the first rigid connector. Both ends of the second centering support are connected to the housing, one side of the second centering support is connected to the second voice coil, and the other side of the second centering support is connected to the second rigid connector.

[0024] In one embodiment, the sound-generating unit further includes a first pad, a second pad, a third pad, and a fourth pad. The first pad and the third pad are disposed opposite each other on both sides of the first centering support, and the second pad and the fourth pad are disposed opposite each other on both sides of the second centering support. The first pad is disposed facing the first voice coil, and the second pad is disposed facing the second voice coil. The first voice coil is electrically connected to the first pad, and the second voice coil is electrically connected to the second pad. The third pad and the fourth pad are both electrically connected to the auxiliary voice coil.

[0025] The present invention also proposes a sound-generating module, the sound-generating module comprising a housing and the aforementioned sound-generating unit, the sound-generating unit being disposed within the housing.

[0026] The technical solution of the present invention uses a magnetic plate unit connected to the housing and a magnet unit set on the magnetic plate unit, so that the magnetic plate unit can replace the traditional back cover to support the magnet unit, thereby allowing the sound-generating unit to have a thinner metal back cover compared to the traditional loudspeaker, thus reducing the thickness of the loudspeaker; in addition, the magnetic plate unit can also conduct magnetism, ensuring that the first magnetic gap and the second magnetic gap have sufficient magnetic flux, which helps to improve the performance of the sound-generating unit. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating unit provided by the present invention;

[0029] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating unit provided by the present invention from another perspective;

[0030] Figure 3An exploded structural diagram of an embodiment of the sound-generating monomer provided by the present invention;

[0031] Figure 4 A cross-sectional structural schematic diagram of an embodiment of the sound-generating unit provided by the present invention;

[0032] Figure 5 A cross-sectional schematic diagram of a portion of the structure of a sound-generating unit according to an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the structure of the first voice coil, the second voice coil, the auxiliary voice coil, and the elastic support member provided by the present invention;

[0034] Figure 7 Another structural schematic diagram of the first voice coil, second voice coil, auxiliary voice coil, and elastic support member provided by the present invention;

[0035] Figure 8 A cross-sectional structural schematic diagram of another embodiment of the sound-generating unit provided by the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the intermediate magnetic plate, the side magnetic plate, and the shell provided by the present invention.

[0037] Figure 10 This is a schematic diagram of the BL curve of the sound-generating unit provided by the present invention and a traditional single-layer voice coil.

[0038] Explanation of icon numbers:

[0039] 100. Sound-generating unit; 1. Magnetic circuit system; 11. Magnet unit; 111. Central magnetic circuit; 1111. Central magnet; 1112. First intermediate magnet; 11121. First clearance slot; 1113. Second intermediate magnet; 11131. Second clearance slot; 1114. Central magnetic yoke; 11141. First body; 11142. First flange; 112. Side magnetic circuit; 1121. Side magnet; 11211. 1. Magnetic block; 11212. Second magnetic block; 11213. Third magnetic block; 11214. Fourth magnetic block; 11215. Flanged clearance groove; 1122. Side magnetic yoke; 11221. Second body; 11222. Second flange; 11223. Leakage hole; 113. Auxiliary magnetic gap; 12. Magnetic guide plate unit; 121. Middle magnetic guide plate; 1211. Middle magnetic guide part; 1212. Side magnetic guide part; 122 1. First magnetic guide plate; 123. Second magnetic guide plate; 124. Side magnetic guide plate; 125. First magnetic gap; 126. Second magnetic gap; 2. Vibration system; 21. Diaphragm; 211. Reinforcing part; 22. First voice coil; 221. First annular voice coil; 23. Second voice coil; 231. Second annular voice coil; 24. Auxiliary voice coil; 25. Connecting assembly; 251. Elastic support; 2511. First centering support; 25111 1. First fixing part; 25112. First spring arm part; 25113. First mounting part; 2512. Second centering support plate; 25121. Second fixing part; 25122. Second spring arm part; 25123. Second mounting part; 252. Rigid connecting piece; 3. Housing; 4. Rear cover; 41. Annular clearance groove; 42. Isolation mesh; 51. First solder pad; 52. Second solder pad; 53. Third solder pad; 54. Fourth solder pad.

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] The trend towards thinner and smaller smart products presents a significant challenge to the acoustic performance of loudspeakers due to the limited internal space. Existing loudspeakers typically have their magnetic circuit systems fixed to a metal back cover, which supports the magnetic circuit system. Therefore, the thickness of the metal back cover directly affects the stability of the support for the magnetic circuit system. Reducing the thickness of the metal back cover may lead to a decrease in the stability of the support for the magnetic circuit system, thereby affecting the performance of the loudspeaker. Therefore, it is not possible to directly reduce the thickness of the loudspeaker by thinning the metal back cover.

[0045] Therefore, it is necessary to propose a sound-generating unit and a sound-generating module, aiming to solve the problem of how to reduce the thickness of the loudspeaker.

[0046] Please see Figures 1 to 3In one embodiment of the present invention, the sound-generating unit 100 includes a magnetic circuit system 1, a vibration system 2, and a housing 3. The magnetic circuit system 1 includes a magnetic yoke unit, a magnet unit 11, and a magnetic plate unit 12. The magnetic yoke unit and the magnetic plate unit 12 are respectively disposed on opposite sides of the magnet unit 11 along a first direction. The magnetic plate unit 12 forms a main magnetic gap, and the magnet unit 11 forms an auxiliary magnetic gap 113. The main magnetic gap and the auxiliary magnetic gap 113 are arranged along the first direction. The main magnetic gap includes a first magnetic gap 125 and a second magnetic gap 126 spaced apart along a second direction. Both the first magnetic gap 125 and the second magnetic gap 126 are connected to the auxiliary magnetic gap 113. The first direction and the second direction are perpendicular to each other. The vibration system 2 vibrates along the first direction. The vibration system 2 includes a diaphragm 21, a first voice coil 22, a second voice coil 23, and an auxiliary voice coil 24. The first 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 side 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. The vibration system 2 and the magnetic circuit system 1 are respectively set at both ends of the housing 3 along the first direction. The outer periphery of the diaphragm 21 is connected to the housing 3. The side of the magnet unit 11 facing the diaphragm 21 is set on the magnetic guide plate unit 12. The magnetic guide plate unit 12 is connected to the housing 3. The magnet unit 11 and the magnetic guide yoke unit are connected to the housing 3 through the magnetic guide plate unit 12.

[0047] The sound-generating unit 100 of this invention can be a loudspeaker unit, and can be used in the sound-generating module of electronic devices, such as computers, mobile phones, and smart wearable devices. This embodiment uses a loudspeaker unit as an example for illustration.

[0048] Please see Figures 1 to 5The technical solution of the present invention uses a magnetic plate unit 12 connected to the housing 3 and a magnet unit 11 disposed on the magnetic plate unit 12, so that the magnetic plate unit 12 can replace the traditional back cover to support the magnet unit 11, thereby allowing the sound-generating unit 100 to have a thinner metal back cover compared to a traditional loudspeaker, thus reducing the thickness of the loudspeaker; in addition, the magnetic plate unit 12 can also conduct magnetism, ensuring that the first magnetic gap 125 and the second magnetic gap 126 have sufficient magnetic flux, which helps to improve the performance of the sound-generating unit 100. In this design, the first voice coil 22 and the second voice coil 23, spaced apart along the second direction, drive the diaphragm 21 to vibrate. The current directions of the first voice coil 22 and the second voice coil 23 are the same, resulting in the same driving force direction. This method of using the first voice coil 22 and the second voice coil 23 to drive the diaphragm 21 to vibrate provides better performance compared to a single-voice-coil loudspeaker. By adding an auxiliary voice coil 24, which is connected to the first voice coil 22 and the second voice coil 23 via a connecting component 25, and with the current directions of the first voice coil 22 and the second voice coil 23 being opposite to those of the auxiliary voice coil 24, the auxiliary voice coil 24, located 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. This driving force, combined with the driving forces of the first voice coil 22 and the second voice coil 23, acts on the diaphragm 21 to drive it to vibrate. This results in a performance improvement for the sound-producing unit 100 compared to a loudspeaker with two voice coils spaced apart along the second direction. It should be noted that... (Please refer to...) Figure 4 The first direction is up and down, and the second direction is left and right.

[0049] It should be noted that when the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24 are energized, they reciprocate to cut magnetic lines of force within the first magnetic gap 125, the second magnetic gap 126, and the auxiliary magnetic gap 113, respectively, causing the diaphragm 21 to vibrate up and down, thereby driving the air to produce sound and completing the energy conversion between electroacoustics.

[0050] According to another embodiment of the present invention, a reinforcing portion 211 is provided on the diaphragm 21. By providing the reinforcing portion 211, the sound-generating unit 100 has better directivity and transient response in the reproduction of high-frequency signals. It should also be noted that the auxiliary voice coil 24 is a single-ring voice coil. The first voice coil 22 includes at least two first-ring voice coils 221 that are nested in sequence and arranged in sequence along the first direction, and the second voice coil 23 includes at least two second-ring voice coils 231 that are nested in sequence and arranged in sequence along the first direction, thereby effectively improving the strength of the reinforcing portion 211 and avoiding high-frequency harmonics of the reinforcing portion 211.

[0051] Please see Figure 3 and Figure 4In one embodiment, the magnet unit 11 includes a central magnetic circuit 111 and a side magnetic circuit 112 disposed around the central magnetic circuit 111. The central magnetic circuit 111 and the side magnetic circuit 112 are spaced apart. The magnetic yoke unit includes a central magnetic yoke 1114 and a side magnetic yoke 1122. The central magnetic yoke 1114 is connected to the central magnetic circuit 111, and the side magnetic yoke 1122 is connected to the side magnetic circuit 112. An auxiliary magnetic gap 113 is formed between the central magnetic yoke 1114 and the side magnetic yoke 1122. 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 plate 124 is connected to the housing 3, and the central magnetic plate is connected to the side magnetic plate 124 along a third direction. The third direction is perpendicular to the first direction and the second direction. The intermediate magnetic plate 121 has its two ends connected to the side magnetic plates 124 on the housing 3. The central magnetic circuit 111 is disposed on the intermediate magnetic plate 121 so that the intermediate magnetic plate 121 can support at least part of the structure of the central magnetic circuit 111, thereby allowing the thickness of the sound-generating unit 100 to be reduced by thinning the conventional back cover. Furthermore, the intermediate magnetic plate 121, the first magnetic plate 122, and the side magnetic plates 124 are used for magnetic conduction to ensure sufficient magnetic flux in the first magnetic gap 125, and the intermediate magnetic plate 121, the second magnetic plate 123, and the side magnetic plates 124 are used for magnetic conduction to ensure sufficient magnetic flux in the second magnetic gap 126. It should be noted that the number of side magnetic plates 124 can be one or more, without limitation. Similarly, the number of intermediate magnetic plates 121, the first magnetic plate 122, and the second magnetic plate 123 can also be one or more.

[0052] Please see Figure 4 , Figure 8 and Figure 9In 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 disposed on the side of the central magnet 1111 away from the diaphragm 21, and the first intermediate magnet 1112 and the second intermediate magnet 1113 are respectively disposed on both sides of the central magnet 1111 along a 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 1122 is disposed on the side of the side magnet 1121 away from the diaphragm 21, and the side magnetic plate 124 is disposed on the side of the side magnet 1121 facing the diaphragm 21. On one side of the diaphragm 21, the central magnet 1111 is disposed on the side of the diaphragm 21 facing the middle magnetic plate 121. The middle magnetic plate 121 is connected to the side magnetic plate 124 along a third direction. The first magnetic plate 122 is disposed on the side of the first middle magnet 1112 facing the diaphragm 21, and the second magnetic plate 123 is disposed on the side of the second middle magnet 1113 facing the diaphragm 21. The central 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 central magnet 1111 is the same as that of the side magnet 1121. The magnetization directions of the first middle magnet 1112 and the second middle magnet 1113 are opposite to that of the central magnet 1111. The central magnet 1111 is disposed on the intermediate magnetic plate 121, and the central magnet 1111, the first intermediate magnet 1112, and the second intermediate magnet 1113 are all disposed on the side of the central magnetic yoke 1114 away from the diaphragm 21, so that the intermediate magnetic plate 121 can support the central magnetic circuit 111. At least a portion of the structure of the side magnet 1121 is disposed on the intermediate magnetic plate 121, and the side magnetic yoke 1122 is disposed on the side of the side magnet 1121 away from the diaphragm 21, so that the intermediate magnetic plate 121 can also provide support for the side magnetic circuit 112, thereby allowing the thickness of the sound-generating unit 100 to be reduced by thinning the conventional back cover. It should be noted that the side magnet 1121 can be a ring magnet.

[0053] In one embodiment, the magnet unit 11 includes a central magnetic circuit 111 and a side magnetic circuit 112 disposed around the central magnetic circuit 111. The central magnetic circuit 111 and the side magnetic circuit 112 are spaced apart. The magnetic yoke unit includes a central magnetic yoke 1114 and a side magnetic yoke 1122. The central magnetic yoke 1114 is connected to the central magnetic circuit 111, and the side magnetic yoke 1122 is connected to the side magnetic circuit 112. An auxiliary magnetic gap 113 is formed between the central magnetic yoke 1114 and the side magnetic yoke 1122. 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 plate 124 is connected to the housing 3, and the central magnetic plate is connected to the housing 3 along a third direction, which is perpendicular to the first direction and the second direction. The two ends of the central magnetic plate extending along a third direction are respectively connected to the housing 3. The side magnetic plates 124 are respectively disposed on both sides of the central magnetic plate along a second direction. Specifically, the central magnetic plate 121 includes a central magnetic part 1211 and side magnetic parts 1212 respectively disposed at both ends of the central magnetic part 1211. The central magnet 1111 is disposed on the side facing the diaphragm 21 in the central magnetic part 1211. The side magnet 1121 includes a first magnet block 11211, a second magnet block 11212, a third magnet block 11213, and a fourth magnet block 11214 arranged sequentially and at intervals along the circumference of the auxiliary voice coil 24. The first magnet block 11211 and the second magnet block 11212... The third magnet 11213 and the fourth magnet 11214 are both disposed on the side magnetic yoke 1122. The first magnet 11211 and the third magnet 11213 are spaced apart along a third direction. The second magnet 11212 and the fourth magnet 11214 are spaced apart along a second direction. The first direction, the second direction and the third direction are orthogonal to each other. The side of the first magnet 11211 and the third magnet 11213 facing the diaphragm 21 are respectively disposed on the two side magnetic parts 1212. The side of the second magnet 11212 and the fourth magnet 11214 facing the diaphragm 21 are both disposed on the side magnetic plate 124. Both side magnetic parts 1212 are connected to the housing 3. The intermediate magnetic conductive part 1211 is used to connect with the central magnet 1111, and the side magnetic conductive part 1212 is used to connect with the first magnet block 11211 and the third magnet block 11213, thereby achieving support and fixation of the central magnetic circuit 111 and the side magnetic circuit 112 through the intermediate magnetic conductive plate 121. It should be noted that the side magnet 1121 surrounds the central magnetic circuit 111 and is spaced apart from it. It should also be noted that the third direction is... Figure 8 The front and back directions are shown.

[0054] According to an embodiment of the present invention, the magnetic circuit system 1 further includes a magnetic component disposed on the connecting assembly 25. The magnetic component is located between the intermediate magnetic guide plate 121 and the central magnetic guide yoke 1114. The magnetic component is subjected to static magnetic force. When the magnetic component is in the equilibrium position, the static magnetic force on the magnetic component is zero. Taking the first voice coil 22 as an example, if the first voice coil 22 vibrates upward from the equilibrium 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-generating unit 100. Since both the first voice coil 22 and the second voice coil 23 are The connection between the second voice coil 23 and the auxiliary voice coil 24 via the connecting component 25 increases the driving force of the second voice coil 23 and the auxiliary voice coil 24 on the diaphragm 21. Similarly, taking the first voice coil 22 as an example, if the first voice coil 22 vibrates downward from its equilibrium position, the magnetic component moves downward along with the first voice coil 22. At this time, the resultant force of the static magnetic force on the magnetic component is downward, 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. This also effectively increases the driving force of the first voice coil 22 on the diaphragm 21, improving the performance of the sound-generating unit 100. Since both the first voice coil 22 and the second voice coil 23 are connected to the auxiliary voice coil 24 via 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 component can be made of permanent magnet materials, such as ferrite, precious metal alloys, etc.; the magnetic component can also be made of magnetically conductive materials; the magnetic component can also be made of soft magnetic materials, 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 restriction here. When there are two magnetic components, the two magnetic components are respectively set to the first voice coil 22 and the second voice coil 23.

[0055] According to one embodiment of the present invention, two side magnetic conductive parts 1212 are injection molded into the housing 3, which improves the connection strength between the middle magnetic conductive plate 121 and the housing 3, and facilitates the assembly of the middle magnetic conductive plate 121.

[0056] According to another embodiment of the present invention, the side magnetic plate 124 is injection molded into the housing 3. Since the second magnet block 11212 and the fourth magnet block 11214 are both disposed on the side facing the diaphragm 21 on the side magnetic plate 124, and the first magnet block 11211, the second magnet block 11212, the third magnet block 11213 and the fourth magnet block 11214 are all disposed on the side facing away from the diaphragm 21 on the side magnetic yoke 1122, the side magnetic plate 124 can also provide effective support for the side magnetic circuit 112.

[0057] Please see Figure 4 , Figure 5 and Figure 10According to an embodiment of the present invention, the central magnetic yoke 1114 includes a first body 11141 and a first flange 11142. The first flange 11142 is bent from the outer periphery of the first body 11141 toward the diaphragm 21. The first intermediate magnet 1112 and the second intermediate magnet 1113 are respectively provided with a first clearance groove 11121 and a second clearance groove 11131 for avoiding the first flange 11142 on the side facing the first flange 11142. By providing the first flange 11142, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and also to 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.

[0058] According to another embodiment of the present invention, the side-guided magnetic yoke 1122 includes a second body 11221 and a second flange 11222. The second flange 11222 bends from the inner periphery of the second body 11221 toward the diaphragm 21. The side magnet 1121 is provided with a flange avoidance groove 11215 for avoiding the second flange 11222 on the side facing the second flange 11222. By providing the second flange 11222, it is beneficial to improve the driving force factor BL of the auxiliary voice coil 24, and also to 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.

[0059] Please refer to 10, where curve a is the BL value curve of the sound-generating unit 100, and curve b is the BL value curve of the traditional single-layer voice coil. The horizontal axis in the figure represents displacement in mm, and the vertical axis represents BL in Wb / m. By cooperating with the first flange 11142 and the second flange 11222, the driving force factor BL of the auxiliary voice coil 24 can be further improved, making 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 first intermediate magnet 1112 is provided with a first clearance groove 11121 corresponding to the first flange 11142, which not only avoids interference between the first intermediate magnet 1112 and the first flange 11142, but also effectively reduces the thickness of the sound-generating unit 100; similarly, the second intermediate magnet 1113 is provided with a second clearance groove 11131 corresponding to the first flange 11142, which not only avoids interference between the second intermediate magnet 1113 and the first flange 11142, but also effectively reduces the thickness of the sound-generating unit 100; the side magnet 1121 is provided with a flange clearance groove 11215 corresponding to the second flange 11222, which not only avoids interference between the side magnet 1121 and the second flange 11222, but also effectively reduces the thickness of the sound-generating unit 100.

[0060] Please see Figure 4 , Figure 5 and Figure 8According to an embodiment of the present invention, the sound-generating unit 100 further includes a rear cover 4, and the magnet unit 11 is disposed on the side away from the diaphragm 21 on the rear cover 4; the rear cover 4 protrudes in a direction away from the diaphragm 21 to form an annular relief groove 41, the groove opening of the annular relief groove 41 is disposed facing the auxiliary magnetic gap 113 and communicating with the auxiliary magnetic gap 113, and the annular relief groove 41 is used to avoid the auxiliary voice coil 24; by forming an annular relief groove 41 on the rear cover 4 to avoid the auxiliary voice coil 24, sufficient downward vibration space is provided for the auxiliary voice coil 24, thereby effectively improving the performance of the sound-generating unit 100.

[0061] According to another embodiment of the present invention, the sound-emitting unit 100 further includes a rear cover 4, on which the magnet unit 11 is disposed on the side opposite to the diaphragm 21; the rear cover 4 is a thin metal sheet; compared with conventional loudspeakers, the sound-emitting unit 100 has a smaller thickness by using a thin metal sheet as the rear cover 4.

[0062] According to another embodiment of the present invention, the vibration system 2 further includes a plurality of balancing diaphragms 21. Each balancing diaphragm 21 is disposed on the side of the side guide yoke 1122 opposite to the diaphragm 21. One end of each balancing diaphragm 21 is connected to the side guide yoke 1122, and the other end of each balancing diaphragm 21 is connected to the auxiliary voice coil 24. The plurality of balancing diaphragms 21 are evenly spaced along the circumference of the auxiliary voice coil 24, thereby balancing the auxiliary voice coil 24. The side guide yoke 1122 has clearance holes for avoiding the balancing diaphragms 21. The number of clearance holes is the same as the number of balancing diaphragms 21, and they are arranged in a one-to-one correspondence. It should be noted that there are four balancing diaphragms 21, which are disposed at the four corners of the auxiliary voice coil 24.

[0063] Please see Figures 3 to 5 In one embodiment, the connecting assembly 25 includes an elastic support 251 and a rigid connector 252. One end of the elastic support 251 is connected to the housing 3. The sides of the first voice coil 22 and the second voice coil 23 facing away from the diaphragm 21 are both connected to the other end of the elastic support 251. One end of the rigid connector 252 is connected to the side of the elastic support 251 facing away from the first voice coil 22 and the second voice coil 23. The other end of the rigid connector 252 is connected to the auxiliary voice coil 24. The elastic support 251 centers and supports the first voice coil 22 and the second voice coil 23, preventing polarization and improving their vibration stability. Since the first voice coil 22 and the second voice coil 23 are connected to the auxiliary voice coil 24 via the rigid connector 252, the elastic support 251 also centers and supports the auxiliary voice coil 24, preventing polarization and improving its vibration stability.

[0064] According to one embodiment of the present invention, a leakage hole 11223 is provided on the side guide yoke 1122, and an isolation mesh hole 42 corresponding to and communicating with the leakage hole 11223 is provided on the rear cover 4. By opening the isolation mesh hole 42 on the rear cover 4 and communicating with the leakage hole 11223, the air pressure is balanced.

[0065] According to another embodiment of the present invention, a magnetic support piece is provided on the elastic support member 251. The magnetic support piece can be made of permanent magnet material, such as ferrite, noble metal alloy, etc.; it can also be made of magnetically conductive material; or it can be made of soft magnetic material, such as pure iron, nickel, etc. The magnetic support piece is subjected to static magnetic force. When the first voice coil 22 and the second voice cavity vibrate upwards from their equilibrium position, the resultant force of the static magnetic force on the magnetic support piece is also upwards. This force acts on the first voice coil 22 and the second voice coil 23 through the elastic support member 251. Since the resultant force of the static magnetic force on the magnetic support piece is perpendicular to the direction of the first voice coil 22 and the second voice coil 23... The vibration direction is consistent with that of the first voice coil 22 and the second voice coil 23, thereby effectively increasing the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, and thus effectively improving the sensitivity of the sound-generating unit 100. Similarly, when the first voice coil 22 and the second voice cavity vibrate downward from their equilibrium position, the resultant force of the static magnetic force on the support magnetic component is also downward. This force will act on the first voice coil 22 and the second voice coil 23 through the elastic support component 251. Since the resultant force of the static magnetic force on the support magnetic component 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-generating unit 100.

[0066] According to an embodiment of the present invention, the elastic support member 251 includes an annular fixing part, a mounting part, and a spring arm part connecting the annular fixing part and the mounting part. The mounting part is connected to the housing, and the first voice coil 22 and the second voice coil 23 are both connected to the annular fixing part. The elastic support member 251 is an integral structural component, thus providing better support stability for the first voice coil 22 and the second voice coil 23. Furthermore, the use of this elastic support member 251 also facilitates wiring.

[0067] Please see Figure 3 , Figure 6 and Figure 7According to another embodiment of the present invention, the elastic support 251 includes a first centering support 2511 and a second centering support 2512, and the rigid connector 252 includes a first rigid connector and a second rigid connector. Both ends of the first centering support 2511 are connected to the housing 3. One side of the first centering support 2511 is connected to the first voice coil 22, and the other side is connected to the first rigid connector. Both ends of the second centering support 2512 are connected to the housing 3. One side of the second centering support 2512 is connected to the second voice coil 23, and the other side is connected to the second rigid connector. By setting the first centering support 2511 to center and support the first voice coil 22, polarization of the first voice coil 22 is prevented, thereby improving the vibration stability of the first voice coil 22. By setting the second centering support 2512 to center and support the second voice coil 23, polarization of the second voice coil 23 is prevented, thereby improving the vibration stability of the second voice coil 23. Compared to using a single integrated centering support, using two independent first centering supports 58 and second centering supports 59 is less costly.

[0068] In one embodiment, the sound-generating unit 100 further includes a first pad 51, a second pad 52, a third pad 53, and a fourth pad 54. The first pad 51 and the third pad 53 are disposed opposite each other on both sides of the first centering support 2511, and the second pad 52 and the fourth pad 54 are disposed opposite each other on both sides of the second centering support 2512. The first pad 51 is disposed towards the first voice coil 22, and the second pad 52 is disposed towards the second voice coil 23. The first voice coil 22 is electrically connected to the first pad 51, the second voice coil 23 is electrically connected to the second pad 52, and the third pad 53 and the fourth pad 54 are both electrically connected to the auxiliary voice coil 24. Compared to a circuit board connected to the voice coil, the sound-generating unit 100 in this embodiment eliminates the need for a circuit board by arranging the first pad 51 and the third pad 53 opposite to each other on both sides of the first centering support 2511, and the second pad 52 and the fourth pad 54 opposite to each other on both sides of the second centering support 2512, thus helping to reduce the thickness of the sound-generating unit 100. It should be noted that there are two first pads 51 and two second pads 52. Furthermore, the first centering support 2511 and the second centering support 2512 not only achieve electrical connection between the first voice coil 22 and the second voice coil 23, but also achieve electrical connection between the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24 and external circuitry.

[0069] According to an embodiment of the present invention, the first centering support 2511 includes a first fixing part 25111, two first spring arms 25112, and two first mounting parts 25113. The two first spring arms 25112 are respectively disposed at both ends of the first fixing part 25111, and the two first mounting parts 25113 are respectively disposed corresponding to one first spring arm 25112. Each first mounting part 25113 is connected to the housing 3. The first solder pad 51 and the third solder pad 53 are respectively disposed on the first fixing part 25111. The second centering support 2512 includes a second fixing part 25121, two second spring arms 25122, and two second mounting parts 25123. The two second spring arms 25122 are respectively disposed at both ends of the second fixing part 25121, and the two second mounting parts 25123 are respectively disposed corresponding to one second spring arm 25122. Each second mounting part 25123 is connected to the housing 3. The second solder pad 52 and the fourth solder pad 54 are respectively disposed on both sides of the second fixing part 25121. The first centering support 2511 and the second centering support 2512 can work together to center and support the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24, preventing the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24 from polarization and improving the vibration stability of the first voice coil 22, the second voice coil 23, and the auxiliary voice coil 24.

[0070] This invention also proposes a sound-generating module, which includes a housing and the aforementioned sound-generating unit 100, with the sound-generating unit 100 disposed within the housing. The sound-generating module can be a speaker module. The sound-generating module can be applied to electronic devices such as computers, mobile phones, and smart wearable devices. Since the sound-generating module employs all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon further here.

[0071] The above are merely exemplary embodiments of the present invention and do not limit the scope of the patent of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A sound-generating monomer, characterized in that, include: A magnetic circuit system, comprising a magnetic yoke unit, a magnet unit, and a magnetic plate unit, wherein the magnetic yoke unit and the magnetic plate unit are respectively disposed on opposite sides of the magnet unit along a first direction, the magnetic plate unit forms a main magnetic gap, and the magnetic yoke unit forms an auxiliary magnetic gap, wherein the main magnetic gap includes a first magnetic gap and a second magnetic gap spaced apart along a second direction, both the first magnetic gap and the second magnetic gap being connected to the auxiliary magnetic gap, and the first direction and the second direction being perpendicular to each other; A vibration system that vibrates along a first direction includes 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 a first magnetic gap, the second voice coil is located in a second magnetic gap, and the auxiliary voice coil is located in an auxiliary magnetic gap. Both the first and second voice coils are connected to the auxiliary voice coil via the connecting assembly. The sides of both the first and second voice coils away from the auxiliary voice coil are connected to the diaphragm. 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 housing, the vibration system and the magnetic circuit system are respectively disposed at both ends of the housing along the first direction, the outer periphery of the diaphragm is connected to the housing, the magnet unit is disposed on the side facing the diaphragm on the magnetic guide plate unit, the magnetic guide plate unit is connected to the housing, and the magnet unit and the magnetic guide yoke unit are connected to the housing through the magnetic guide plate unit.

2. The sound-generating unit as described in claim 1, characterized in that, The magnet unit includes a central magnetic circuit and side magnetic circuits disposed around the central magnetic circuit, with the central magnetic circuit and the side magnetic circuits spaced apart. The magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke, with the central magnetic yoke connected to the central magnetic circuit and the side magnetic yoke connected to the side magnetic circuits, forming the auxiliary magnetic gap between the central magnetic yoke and the side magnetic yokes. The magnetic plate unit includes a central magnetic plate and a side magnetic plate, with the central magnetic plate connected to the central magnetic circuit and the side magnetic plate connected to the side magnetic circuits. The side magnetic plate is connected to the housing, and the central magnetic plate is connected to the side magnetic plate along a third direction, which is perpendicular to the first direction and the second direction.

3. The sound-generating unit as described in claim 2, 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 disposed on the side of the magnetic yoke away from the diaphragm. The first intermediate magnet and the second intermediate magnet are respectively disposed 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 side magnets. The side magnetic yoke is disposed on the side of the side magnet away from the diaphragm, and the side magnetic plate is disposed on the side of the side magnet facing the diaphragm. The central magnet faces... A central magnetic plate is disposed on one side of the diaphragm. The central magnetic plate is connected to the side magnetic plate along the third direction. The first magnetic plate is disposed on the side of the first central magnet facing the diaphragm, and the second magnetic plate is disposed on the side of the second central magnet facing the diaphragm. The central magnet, the first central magnet, the second central magnet, and the side magnets are all magnetized along the first direction, and the magnetization direction of the central magnet is the same as that of the side magnets. The magnetization directions of the first central magnet and the second central magnet are opposite to that of the central magnet.

4. The sound-generating unit as described in claim 1, characterized in that, The magnet unit includes a central magnetic circuit and side magnetic circuits disposed around the central magnetic circuit, with the central magnetic circuit and the side magnetic circuits spaced apart. The magnetic yoke unit includes a central magnetic yoke and a side magnetic yoke, with the central magnetic yoke connected to the central magnetic circuit and the side magnetic yoke connected to the side magnetic circuits, forming the auxiliary magnetic gap between the central magnetic yoke and the side magnetic yokes. The magnetic plate unit includes a central magnetic plate and a side magnetic plate, with the central magnetic plate connected to the central magnetic circuit and the side magnetic plate connected to the side magnetic circuits. The side magnetic plate is connected to the housing, and the center magnetic plate is connected to the housing along a third direction, which is perpendicular to the first direction and the second direction.

5. The sound-generating unit as described in claim 2, characterized in that, The side magnetic plate is injection molded into the housing.

6. The sound-generating unit as described in claim 3, characterized in that, The central magnetic yoke includes a first body and a first flange. The first flange bends from the outer periphery of the first body toward the diaphragm. The first intermediate magnet and the second intermediate magnet are respectively provided with a first clearance groove and a second clearance groove on the side facing the first flange to avoid the first flange. And / or, The side-guided magnetic yoke includes a second body and a second flange. The second flange bends from the inner periphery of the second body toward the diaphragm. The side magnet is provided with a flange avoidance groove on the side facing the second flange to avoid the second flange.

7. The sound-generating unit as described in any one of claims 1 to 6, characterized in that, The sound-generating unit also includes a back cover, and the side of the magnet unit facing away from the diaphragm is disposed on the back cover; The rear cover protrudes away from the diaphragm to form an annular clearance groove. The opening of the annular clearance groove is positioned facing the auxiliary magnetic gap and is connected to the auxiliary magnetic gap. The annular clearance groove is used to avoid the auxiliary voice coil. And / or, The back cover is a thin metal sheet.

8. The sound-generating unit as described in any one of claims 1 to 6, characterized in that, The connection assembly includes an elastic support and a rigid connector. One end of the elastic support is connected to the housing. The sides of the first and second voice coils facing away from the diaphragm are both connected to the other end of the elastic support. One end of the rigid connector is connected to the side of the elastic support facing away from the first and second voice coils. The other end of the rigid connector is connected to the auxiliary voice coil.

9. The sound-generating unit as described in claim 8, characterized in that, The elastic support includes an annular fixing part, a mounting part, and a spring arm part connecting the annular fixing part and the mounting part. The mounting part is connected to the housing, and the first voice coil and the second voice coil are both connected to the annular fixing part. Alternatively, the elastic support includes a first centering support and a second centering support, and the rigid connector includes a first rigid connector and a second rigid connector. Both ends of the first centering support are connected to the housing, one side of the first centering support is connected to the first voice coil, and the other side of the first centering support is connected to the first rigid connector. Both ends of the second centering support are connected to the housing, one side of the second centering support is connected to the second voice coil, and the other side of the second centering support is connected to the second rigid connector.

10. The sound-generating unit as described in claim 9, characterized in that, The sound-generating unit further includes a first pad, a second pad, a third pad, and a fourth pad. The first pad and the third pad are disposed opposite each other on both sides of the first centering support, and the second pad and the fourth pad are disposed opposite each other on both sides of the second centering support. The first pad is positioned towards the first voice coil, and the second pad is positioned towards the second voice coil. The first voice coil is electrically connected to the first pad, and the second voice coil is electrically connected to the second pad. The third pad and the fourth pad are both electrically connected to the auxiliary voice coil.

11. A sound-generating module, characterized in that, The sound-generating module includes a housing and a sound-generating unit as described in any one of claims 1 to 10, wherein the sound-generating unit is disposed within the housing.

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