Sound generator and sound module

Abstract

This invention discloses a sound-generating unit and a sound-generating module, relating to the field of sound energy conversion technology. The sound-generating unit includes a magnetic circuit system, a vibration system, a magnetic component, and an elastic support. The magnetic circuit system forms a first magnetic gap and a second magnetic gap. The vibration system vibrates along a first direction and includes a diaphragm, a first voice coil, and a second voice coil. The first voice coil is located in the first magnetic gap, and the second voice coil is located in the second magnetic gap. Both the first and second voice coils are connected to the diaphragm, and the current directions of the first and second voice coils are the same. One end of the elastic support is connected to the magnetic circuit system, and both the first and second voice coils are connected to the other end of the elastic support. The magnetic component is disposed on the elastic support and can provide a force to the first and second voice coils opposite to the direction of the diaphragm's restoring force. By adding the magnetic component, the performance of the sound-generating unit is improved.

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 speakers due to limited internal space. Reducing the size of the speaker can weaken its performance. Traditionally, improving speaker performance involves increasing the size of the magnet, but this also increases the speaker's size, making it unsuitable for the device. Conversely, reducing the speaker's size reduces the internal space, potentially limiting the space for the magnet. In such cases, smaller magnets must be used, but this reduction can also compromise the speaker's performance, making it unsuitable for the entire device. 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 improve the performance of loudspeakers.

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

[0005] A magnetic circuit system having a first magnetic gap and a second magnetic gap;

[0006] A vibration system that vibrates along a first direction includes a diaphragm, a first voice coil, and a second voice coil. The first voice coil is located in a first magnetic gap, and the second voice coil is located in a second magnetic gap. Both the first and second voice coils are connected to the diaphragm, and the current directions of the first and second voice coils are the same.

[0007] Magnetic components;

[0008] An elastic support member is provided, one end of which is connected to the magnetic circuit system. The first voice coil and the second voice coil are both connected to the other end of the elastic support member. A magnetic component is disposed on the elastic support member, and the magnetic component is capable of providing the first voice coil and the second voice coil with a force opposite to the direction of the diaphragm restoring force.

[0009] In one embodiment, the diaphragm includes a first connecting portion, a second connecting portion, and a bent portion connecting the first connecting portion and the second connecting portion. The first connecting portion is connected to the magnetic circuit system, and both the first voice coil and the second voice coil are connected to the second connecting portion. The bent portion extends along a first direction and includes a first bent segment. The sidewall of the diaphragm protrudes along a second direction to form the first bent segment, and the second direction is perpendicular to the first direction.

[0010] In one embodiment, the bending portion further includes a second bending segment, one end of the first bending segment is connected to the first connecting portion, the other end of the first bending segment is connected to the second bending segment, and the end of the second bending segment away from the first bending segment is connected to the second connecting portion. The first bending segment and the second bending segment are arranged sequentially along the first direction, and the second bending segment is bent along the second direction.

[0011] In one embodiment, the bending direction of the first bending segment is opposite to the bending direction of the second bending segment;

[0012] And / or, the second connecting portion includes an arc-shaped transition section and a connecting section, one end of the arc-shaped transition section is connected to the second bending section, the other end of the arc-shaped transition section is connected to the connecting section, and both the first voice coil and the second voice coil are connected to the connecting section.

[0013] In one embodiment, the magnetic circuit system includes a magnet unit and a magnetic yoke. The magnetic yoke is disposed on the side of the magnet unit away from the diaphragm. The magnet unit includes a central magnetic circuit, an intermediate magnetic circuit disposed around the central magnetic circuit, and a side magnetic circuit disposed around the intermediate magnetic circuit. The intermediate magnetic circuit includes a first intermediate magnetic circuit and a second intermediate magnetic circuit disposed on both sides of the central magnetic circuit along a second direction. A first magnetic gap surrounds the first intermediate magnetic circuit, and a second magnetic gap surrounds the second intermediate magnetic circuit. The first direction and the second direction are perpendicular to each other. The magnetic yoke is provided with clearance holes corresponding to the magnetic components.

[0014] In one embodiment, the central magnetic circuit includes a central magnet and a central magnetic guide plate; the first intermediate magnetic circuit includes a first intermediate magnet and a first intermediate magnetic guide plate; the second intermediate magnetic circuit includes a second intermediate magnet and a second intermediate magnetic guide plate; the side magnetic circuit includes a side magnet and a side magnetic guide plate; the central magnetic guide plate is disposed on the side of the central magnet facing the diaphragm; the first intermediate magnetic guide plate is disposed on the side of the first intermediate magnet facing the diaphragm; the second intermediate magnetic guide plate is disposed on the side of the second intermediate magnet facing the diaphragm; and the side magnetic guide plate is disposed on the side of the side 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. 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 those of the central magnet.

[0015] In one embodiment, the side magnetic plate is annular, and the diaphragm includes a first connecting portion, a second connecting portion, and a bent portion connecting the first connecting portion and the second connecting portion. The first connecting portion is connected to the side magnetic plate, and the first voice coil and the second voice coil are both connected to the second connecting portion. The bent portion extends along the first direction and includes a first bent segment. The sidewall of the diaphragm protrudes along the second direction to form the first bent segment, and the second direction is perpendicular to the first direction.

[0016] In one embodiment, the first magnetic gap and the second magnetic gap are spaced apart along a second direction. The elastic support includes a first centering support and a second centering support. One end of the first centering support is connected to the magnetic circuit system. The first voice coil and the second voice coil are both connected to the other end of the first centering support. One end of the second centering support is connected to the magnetic circuit system. The first voice coil and the second voice coil are both connected to the other end of the second centering support. The first centering support and the second centering support are spaced apart along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The magnetic component includes a first magnetic element and a second magnetic element. The first magnetic element is disposed on the side of the first centering support opposite to the diaphragm, and the second magnetic element is disposed on the side of the second centering support opposite to the diaphragm.

[0017] In one embodiment, the first centering support includes a first fixing part, two first spring arms and two first mounting parts. The two first spring arms are respectively disposed at both ends of the first fixing part. The first mounting parts are disposed in one-to-one correspondence with the first spring arms. Each first mounting part is connected to the magnetic circuit system. The first voice coil and the second voice coil are disposed on one side of the first fixing part, and the first magnetic element is disposed on the other side of the first fixing part.

[0018] The second centering support includes a second fixing part, two second spring arms and two second mounting parts. The two second spring arms are respectively disposed at both ends of the second fixing part. The second mounting parts are disposed in a one-to-one correspondence with the second spring arms. Each second mounting part is connected to the magnetic circuit system. The first voice coil and the second voice coil are disposed on one side of the second fixing part, and the second magnetic element is disposed on the other side of the second fixing part.

[0019] In one embodiment, the magnetic circuit system includes a magnet unit and a magnetic yoke. The magnetic yoke is disposed on the side of the magnet unit away from the diaphragm. The magnet unit forms a first magnetic gap and a second magnetic gap. The sound-generating unit also includes a back cover. A leakage hole is formed between the magnetic yoke and the magnet unit. An isolation mesh corresponding to and communicating with the leakage hole is provided on the back cover.

[0020] The present invention also proposes a sound-generating module, characterized in that the sound-generating module includes a housing and the aforementioned sound-generating unit, wherein the sound-generating unit is disposed within the housing.

[0021] The technical solution of this invention involves setting a magnetic component on an elastic support member. The magnetic component is subjected to static magnetic force. When the resultant force of the static magnetic force on the magnetic component is zero, it is in equilibrium. When the first voice coil and the second voice cavity vibrate upward from the equilibrium position, the direction of the resultant force of the static magnetic force on the magnetic component is also upward. This force acts on the first and second voice coils through the elastic support member. Since the direction of the resultant force of the static magnetic force on the magnetic component is consistent with the vibration direction of the first and second voice coils, the driving force of the first and second voice coils on the diaphragm is effectively increased, thereby effectively improving the performance of the sound-producing unit. Similarly, when the first voice coil and the second voice cavity vibrate downward from the equilibrium position, the direction of the resultant force of the static magnetic force on the magnetic component is also downward. This force acts on the first and second voice coils through the elastic support member. Since the direction of the resultant force of the static magnetic force on the magnetic component is consistent with the vibration direction of the first and second voice coils, the driving force of the first and second voice coils on the diaphragm is effectively increased, thereby effectively improving the performance of the sound-producing unit. Attached Figure Description

[0022] 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.

[0023] Figure 1A schematic diagram of the structure of an embodiment of the sound-generating unit provided by the present invention;

[0024] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating unit provided by the present invention from another perspective;

[0025] Figure 3 An exploded structural diagram of an embodiment of the sound-generating monomer provided by the present invention;

[0026] Figure 4 A cross-sectional structural schematic diagram of an embodiment of the sound-generating unit provided by the present invention;

[0027] Figure 5 A cross-sectional structural schematic diagram of another embodiment of the sound-generating unit provided by the present invention;

[0028] Figure 6 An exploded view of a portion of the structure of a sound-generating monomer provided by the present invention;

[0029] Figure 7 A graph showing the variation trend of the effective vibration area of ​​the diaphragm as a function of amplitude in an embodiment of the sound-generating unit provided by the present invention.

[0030] Figure 8 A simulation diagram of the state of the front cavity when the diaphragm vibrates upward in an embodiment of the sound-generating unit provided by the present invention;

[0031] Figure 9 A simulation diagram of the front cavity state when the diaphragm of a sound-generating unit according to an embodiment of the present invention is in a balanced position;

[0032] Figure 10 A simulation diagram of the front cavity state when the diaphragm vibrates downward in an embodiment of the sound-generating unit provided by the present invention.

[0033] Explanation of icon numbers:

[0034] 100. Sound-generating unit; 1. Magnetic circuit system; 11. Magnet unit; 111. Central magnetic circuit; 1111. Central magnet; 1112. Central magnetic guide plate; 112. Intermediate magnetic circuit; 1121. First intermediate magnetic circuit; 11211. First intermediate magnet; 11212. First intermediate magnetic guide plate; 1122. Second intermediate magnetic circuit; 11221. Second intermediate magnet; 11222. Second intermediate magnetic guide plate; 113. Side magnetic circuit; 1131. Side magnet; 1132. Side magnetic guide plate; 114. First magnetic gap; 115. Second magnetic gap; 12. Magnetic yoke; 121. Clearance hole; 2. Vibration system; 21. Diaphragm; 211. First connecting part; 212, second connecting part; 2121, arc-shaped transition section; 2122, connecting section; 213, bending part; 2131, first bending section; 2132, second bending section; 214, reinforcing part; 22, first voice coil; 23, second voice coil; 3, magnetic assembly; 31, first magnetic component; 32, second magnetic component; 4, elastic support component; 41, first centering support plate; 411, first fixing part; 412, first mounting part; 413, first spring arm part; 42, second centering support plate; 421, second fixing part; 422, second mounting part; 423, second spring arm part; 5, rear cover; 51, isolation mesh; 6, front cavity.

[0035] 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

[0036] 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.

[0037] 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] 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.

[0039] The trend towards thinner and smaller smart products presents a significant challenge to the acoustic performance of speakers due to limited internal space. Reducing the size of the speaker can weaken its performance. Traditionally, improving speaker performance involves increasing the size of the magnet, but this also increases the speaker's size, making it unsuitable for the device. Conversely, reducing the speaker's size reduces the internal space, potentially limiting the space for the magnet. In such cases, smaller magnets must be used, but this reduction can also compromise the speaker's performance, making it unsuitable for the entire device.

[0040] Therefore, it is necessary to propose a sound-generating unit and a sound-generating module, which aims to solve how to enhance the performance of loudspeakers.

[0041] Please see Figures 1 to 3 In one embodiment of the present invention, the sound-generating unit 100 includes a magnetic circuit system 1, a vibration system 2, a magnetic component 3, and an elastic support 4. The magnetic circuit system 1 forms a first magnetic gap 114 and a second magnetic gap 115. The vibration system 2 vibrates along a first direction and includes a diaphragm 21, a first voice coil 22, and a second voice coil 23. The first voice coil 22 is located in the first magnetic gap 114, and the second voice coil 23 is located in the second magnetic gap 115. Both the first voice coil 22 and the second voice coil 23 are connected to the diaphragm 21, and the current directions of the first voice coil 22 and the second voice coil 23 are the same. One end of the elastic support 4 is connected to the magnetic circuit system 1, and both the first voice coil 22 and the second voice coil 23 are connected to the other end of the elastic support 4. The magnetic component 3 is disposed on the elastic support 4 and can provide the first voice coil 22 and the second voice coil 23 with a force opposite to the restoring force direction of the diaphragm 21.

[0042] 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.

[0043] Please see Figure 1 , Figure 3 and Figure 4 The technical solution of this invention involves setting a magnetic component 3 on the elastic support 4. The magnetic component 3 is subjected to static magnetic force. When the magnetic component 3 is in the equilibrium position, the resultant force of the static magnetic force is zero. When the first voice coil 22 and the second voice coil 23 vibrate upward from the equilibrium position, the magnetic component 3 vibrates upward synchronously, and the direction of the resultant force of the static magnetic force it receives is upward. This force acts on the first voice coil 22 and the second voice coil 23 through the elastic support 4. Since the direction of the resultant force of the static magnetic force on the magnetic component 3 is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, the strength of the first voice coil 22 is effectively increased. The driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21 effectively improves the performance of the sound-generating unit 100. Similarly, when the first voice coil 22 and the second voice coil 23 vibrate downward from their equilibrium position, the resultant force of the static magnetic force on the magnetic component 3 is also downward. This force acts on the first voice coil 22 and the second voice coil 23 through the elastic support 4. Since the direction of the resultant force of the static magnetic force on the magnetic component 3 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 performance of the sound-generating unit 100. It should be noted that the magnetic component 3 can be made of permanent magnet materials, such as ferrite, precious metal alloys, etc.; the magnetic component 3 can also be made of magnetically conductive materials; the magnetic component 3 can also be made of soft magnetic materials, such as pure iron, nickel, etc. It should also be noted that the elastic support 4 is used to connect the first voice coil 22 and the second voice coil 23, thereby playing a role in centering and supporting the first voice coil 22 and the second voice coil 23, thus 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.

[0044] It should be noted that when the first voice coil 22 and the second voice coil 23 are energized, the first voice coil 22 and the second voice coil 23 respectively reciprocate to cut the magnetic lines of force within the first magnetic gap 114 and the second magnetic gap 115, driving the diaphragm 21 to vibrate up and down, thereby inducing air to produce sound and completing the energy conversion between electroacoustics.

[0045] According to an embodiment of the present invention, the elastic support 4 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 magnetic circuit system 1, and the first voice coil 22 and the second voice coil 23 are both connected to the annular fixing part. The elastic support 4 is an integral structural component, so it has better support stability for the first voice coil 22 and the second voice coil 23, and the use of this elastic support 4 also facilitates wiring.

[0046] According to another embodiment of the present invention, a reinforcing part 214 is provided on the diaphragm 21, and by providing the reinforcing part 214, the sound-generating unit 100 has better directivity and transient response in the reproduction of high-frequency signals.

[0047] Please see Figure 4 and Figure 5 In one embodiment, the diaphragm 21 includes a first connecting portion 211, a second connecting portion 212, and a bent portion 213 connecting the first connecting portion 211 and the second connecting portion 212. The first connecting portion 211 is connected to the magnetic circuit system 1, and the first voice coil 22 and the second voice coil 23 are both connected to the second connecting portion 212. The bent portion 213 extends along a first direction and includes a first bent section 2131. The sidewall of the diaphragm 21 protrudes along a second direction to form the first bent section 2131, and the second direction is perpendicular to the first direction. By providing the first bent section 2131, the diaphragm 21 tends to have a large amplitude and a small effective vibration area in the low-frequency region, and a small amplitude and a large effective vibration area in the mid-frequency region, thereby enhancing the low-frequency and mid-frequency sensitivity of the sound-generating unit 100.

[0048] In one embodiment, the bending portion 213 further includes a second bending segment 2132. One end of the first bending segment 2131 is connected to the first connecting portion 211, and the other end of the first bending segment 2131 is connected to the second bending segment 2132. The end of the second bending segment 2132 away from the first bending segment 2131 is connected to the second connecting portion 212. The first bending segment 2131 and the second bending segment 2132 are arranged sequentially along a first direction, and the second bending segment 2132 is bent along a second direction. By providing the second bending segment 2132, the diaphragm 21 can also have a tendency to have a large amplitude and a small effective vibration area in the low-frequency region, and a small amplitude and a large effective vibration area in the mid-frequency region, thereby enhancing the low-frequency and mid-frequency sensitivity of the sound-generating unit 100.

[0049] Please see Figure 5In one embodiment, the bending direction of the first bending segment 2131 is opposite to that of the second bending segment 2132. That is, if the first bending segment 2131 bends outward, then the second bending segment 2132 bends inward, preventing interference between the first bending segment 2131 and the second bending segment 2132 during the downward vibration of the diaphragm 21. Furthermore, the fact that the first bending segment 2131 and the second bending segment 2132 bend in opposite directions allows the diaphragm 21 to exhibit a tendency for a large amplitude and a smaller effective vibration area in the low-frequency region, and a tendency for a small amplitude and a larger effective vibration area in the mid-frequency region, further enhancing the low-frequency and mid-frequency sensitivity of the sound-generating unit 100. It should be noted that... (See also...) Figures 7 to 10 The change in volume and displacement of the front cavity 6 during the vibration of the simulated vibration system 2 can be used to deduce the trend of the effective vibration area of ​​the diaphragm 21 with the amplitude.

[0050] In one embodiment, the second connecting portion 212 includes an arc-shaped transition section 2121 and a connecting section 2122. One end of the arc-shaped transition section 2121 is connected to the second bent section 2132, and the other end of the arc-shaped transition section 2121 is connected to the connecting section 2122. The first voice coil 22 and the second voice coil 23 are both connected to the connecting section 2122. By providing the arc-shaped transition section 2121, a smooth transition is achieved between the second bent section 2132 and the connecting section 2122.

[0051] Please see Figures 4 to 6 In one embodiment, the magnetic circuit system 1 includes a magnet unit 11 and a magnetic yoke 12. The magnetic yoke 12 is disposed on the side of the magnet unit 11 away from the diaphragm 21. The magnet unit 11 includes a central magnetic circuit 111, an intermediate magnetic circuit 112 disposed around the central magnetic circuit 111, and a side magnetic circuit 113 disposed around the intermediate magnetic circuit 112. The intermediate magnetic circuit 112 includes a first intermediate magnetic circuit 1121 and a second intermediate magnetic circuit 1122 disposed on both sides of the central magnetic circuit 111 along a second direction. A first magnetic gap 114 surrounds the first intermediate magnetic circuit 1121, and a second magnetic gap 115 surrounds the second intermediate magnetic circuit 1122. The first direction and the second direction are perpendicular to each other. The magnetic yoke 12 is provided with a clearance hole 121 corresponding to the magnetic component 3. By setting the magnetic yoke 12 for magnetic conduction, sufficient magnetic flux is ensured in the first magnetic gap 114 and the second magnetic gap 115. The magnetic yoke is provided with a clearance hole 121 to allow the magnetic component 3 to pass through, thereby ensuring that the elastic support 4 and the voice coil assembly have sufficient downward vibration space, which helps to improve the performance of the sound-generating unit 100. Furthermore, the magnitude of the static magnetic force on the magnetic component 3 can be changed by adjusting the size of the clearance hole 121, thus making the magnitude of the static magnetic force on the magnetic component 3 adjustable.

[0052] Please see Figures 4 to 6In one embodiment, the central magnetic circuit 111 includes a central magnet 1111 and a central magnetic guide plate 1112; the first intermediate magnetic circuit 1121 includes a first intermediate magnet 11211 and a first intermediate magnetic guide plate 11212; the second intermediate magnetic circuit 1122 includes a second intermediate magnet 11221 and a second intermediate magnetic guide plate 11222; the side magnetic circuit 113 includes a side magnet 1131 and a side magnetic guide plate 1132; the central magnetic guide plate 1112 is disposed on the side of the central magnet 1111 facing the diaphragm 21; and the first intermediate magnetic guide plate 11212 is disposed on the side of the first intermediate magnet 11211 facing the diaphragm 21. On one side of the diaphragm 21, a second intermediate magnetic plate 11222 is disposed on the side of the second intermediate magnet 11221 facing the diaphragm 21, and a side magnetic plate 1132 is disposed on the side of the side magnet 1131 facing the diaphragm 21. The central magnet 1111, the first intermediate magnet 11211, the second intermediate magnet 11221, and the side magnet 1131 are all magnetized along a first direction. The magnetization direction of the central magnet 1111 is the same as that of the side magnet 1131, while the magnetization directions of the first intermediate magnet 11211 and the second intermediate magnet 11221 are opposite to those of the central magnet 1111. By setting the central magnetic plate 1112, the first intermediate magnetic plate 11212, the second intermediate magnetic plate 11222, and the side magnetic plate 1132 for magnetic guidance, sufficient magnetic flux is ensured for the first magnetic gap 114 and the second magnetic gap 115.

[0053] According to one embodiment of the present invention, the side magnetic plate 1132 is annular, and the first connecting portion 211 is connected to the side magnetic plate 1132. That is, the side magnetic plate 1132 acts as a housing to fix the diaphragm 21, simplifying the components and assembly steps of the sound-generating unit 100.

[0054] Please see Figure 3 and Figure 4In one embodiment, the first magnetic gap 114 and the second magnetic gap 115 are spaced apart along the second direction. The elastic support member 4 includes a first centering support plate 41 and a second centering support plate 42. One end of the first centering support plate 41 is connected to the magnetic circuit system 1. The first voice coil 22 and the second voice coil 23 are both connected to the other end of the first centering support plate 41. One end of the second centering support plate 42 is connected to the magnetic circuit system 1. The first voice coil 22 and the second voice coil 23 are both connected to the other end of the second centering support plate 42. The first centering support plate 41 and the second centering support plate 42 are spaced apart along the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The magnetic component 3 includes a first magnetic element 31 and a second magnetic element 32. The first magnetic element 31 is disposed on the side of the first centering support plate 41 away from the diaphragm 21, and the second magnetic element 32 is disposed on the side of the second centering support plate 42 away from the diaphragm 21. Compared to using a single integral centering support, using two independent first centering supports 41 and second centering supports 42 eliminates the need for a connecting structure between the first and second centering supports 41, thus reducing costs. It should be noted that the first direction is... Figure 5 The vertical direction is shown, and the second direction is... Figure 5 The left and right directions are shown, and the third direction is... Figure 4 The front and back directions are shown.

[0055] In one embodiment, the first centering support 41 includes a first fixing part 411, two first spring arms 413, and two first mounting parts 412. The two first spring arms 413 are respectively disposed at both ends of the first fixing part 411, and the first mounting parts 412 are disposed one-to-one with the first spring arms 413. Each first mounting part 412 is connected to the magnetic circuit system 1. The first voice coil 22 and the second voice coil 23 are disposed on one side of the first fixing part 411, and the first magnetic element 31 is disposed on the first fixing part 411. On the other side, the second centering support 42 includes a second fixing part 421, two second spring arms 423, and two second mounting parts 422. The two second spring arms 423 are respectively disposed at both ends of the second fixing part 421, and the second mounting parts 422 are disposed one-to-one with the second spring arms 423. Each second mounting part 422 is connected to the magnetic circuit system 1. The first voice coil 22 and the second voice coil 23 are disposed on one side of the second fixing part 421, and the second magnetic component 32 is disposed on the other side of the second fixing part 421. Specifically, the first mounting part 412 and the second mounting part 422 are both connected to the side magnetic guide plate 1132. The first fixing part 411 is connected to the first voice coil 22 and the second voice coil 23, and the second fixing part 421 is connected to the first voice coil 22 and the second voice coil 23, thus playing a centering and supporting role for the first voice coil 22 and the second voice coil 23, 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. It should be noted that the side magnetic circuit 113 is provided with clearance space for both the first spring arm 413 and the second spring arm 423.

[0056] According to one embodiment of the present invention, the elastic support 4 is provided with a first pad and a second pad. The first pad is electrically connected to the lead of the first voice coil 22, and the second pad is electrically connected to the lead of the second voice coil 23. Compared with providing a circuit board connected to the voice coil, the sound-generating unit 100 of this embodiment eliminates the circuit board structure by providing the first pad and the second pad on the elastic support 4, which helps to reduce the thickness of the sound-generating unit 100.

[0057] Please see Figures 2 to 4In one embodiment, the magnetic circuit system 1 includes a magnet unit 11 and a magnetic yoke 12. The magnetic yoke 12 is disposed on the side of the magnet unit 11 facing away from the diaphragm 21. The magnet unit 11 forms a first magnetic gap 114 and a second magnetic gap 115. The sound-generating unit 100 also includes a rear cover 5. A leakage hole is provided on the magnetic yoke 12, and an isolation mesh 51 corresponding to and communicating with the leakage hole is provided on the rear cover 5. It should be noted that a leakage hole can also be formed between the magnetic yoke 12 and the magnet unit 11, and an isolation mesh 51 corresponding to and communicating with the leakage hole can be provided on the rear cover 5. By opening an isolation mesh 51 on the rear cover 5 to communicate with the leakage hole, the air pressure is balanced. It can be understood that the rear cover 5 can simultaneously cover the leakage hole and the clearance hole 121 provided on the magnetic yoke. It should be noted that the rear cover 5 is a metal rear cover.

[0058] According to one embodiment of the present invention, the rear cover 5 protrudes in the direction away from the diaphragm 21 to form a relief groove, the groove opening facing the relief hole 121, the relief groove is used to avoid the magnetic component 3, thereby ensuring that the first voice coil 22 and the second voice coil 23 have sufficient downward vibration space.

[0059] 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.

[0060] 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 producing monomer, characterized in that, The application relates to a loudspeaker, which comprises: a magnetic circuit system, which is formed with a first magnetic gap and a second magnetic gap; a vibration system, which vibrates in a first direction, and comprises a diaphragm, a first voice coil and a second 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 first voice coil and the second voice coil are both connected with the diaphragm, and the current directions of the first voice coil and the second voice coil are the same; a magnetic assembly; an elastic support, one end of which is connected with the magnetic circuit system, the first voice coil and the second voice coil are both connected with the other end of the elastic support, the magnetic assembly is arranged on the elastic support, and the magnetic assembly can provide an acting force, which is opposite to the restoring force direction of the diaphragm, for the first voice coil and the second voice coil.

2. The sound producing monomer of claim 1, wherein, The diaphragm comprises a first connecting part, a second connecting part and a bending part connecting the first connecting part and the second connecting part, the first connecting part is connected with the magnetic circuit system, the first voice coil and the second voice coil are both connected with the second connecting part, the bending part extends in the first direction, the bending part comprises a first bending section, and the side wall of the diaphragm is raised to form the first bending section in a second direction, wherein the second direction is perpendicular to the first direction.

3. The sound producing monomer of claim 2, wherein, The bending part further comprises a second bending section, the first bending section and the second bending section are arranged in sequence in the first direction, one end of the first bending section is connected with the first connecting part, and the other end of the first bending section is connected with the second bending section.

4. The sound producing monomer of claim 3, wherein, The second bending section is bent in the second direction, and the bending direction of the first bending section is opposite to that of the second bending section. Furthermore, the second connecting part comprises an arc-shaped transition section and a connecting section, one end of the arc-shaped transition section is connected with the second bending section, the other end of the arc-shaped transition section is connected with the connecting section, and the first voice coil and the second voice coil are both connected with the connecting section.

5. The sound producing monomer of claim 1, wherein, The magnetic circuit system comprises a magnet unit and a magnetic yoke, the magnetic yoke is arranged on the side of the magnet unit, which is away from the diaphragm, the magnet unit comprises a central magnetic circuit, an intermediate magnetic circuit arranged on the circumferential side of the central magnetic circuit and an edge magnetic circuit arranged on the circumferential side of the intermediate magnetic circuit, the intermediate magnetic circuit comprises a first intermediate magnetic circuit and a second intermediate magnetic circuit arranged on the two sides of the central magnetic circuit in a second direction respectively, the first magnetic gap surrounds the first intermediate magnetic circuit, the second magnetic gap surrounds the second intermediate magnetic circuit, the first direction and the second direction are perpendicular to each other, and the magnetic yoke is provided with a relief hole corresponding to the magnetic assembly.

6. The sound producing monomer of claim 5, wherein, The center magnetic circuit comprises a center magnet and a center magnetic conductive plate, the first intermediate magnetic circuit comprises a first intermediate magnet and a first intermediate magnetic conductive plate, the second intermediate magnetic circuit comprises a second intermediate magnet and a second intermediate magnetic conductive plate, the edge magnetic circuit comprises an edge magnet and an edge magnetic conductive plate, the center magnetic conductive plate is arranged on the side of the center magnet facing the diaphragm, the first intermediate magnetic conductive plate is arranged on the side of the first intermediate magnet facing the diaphragm, the second intermediate magnetic conductive plate is arranged on the side of the second intermediate magnet facing the diaphragm, the edge magnetic conductive plate is arranged on the side of the edge magnet facing the diaphragm, the center magnet, the first intermediate magnet, the second intermediate magnet and the edge magnet are magnetized along the first direction, the magnetization direction of the center magnet is the same as that of the edge magnet, and the magnetization directions of the first intermediate magnet and the second intermediate magnet are opposite to that of the center magnet.

7. The sound producing monomer of claim 6, wherein, The edge magnetic conductive plate is annular, the diaphragm comprises a first connecting portion, a second connecting portion and a bending portion connecting the first connecting portion and the second connecting portion, the first connecting portion is connected with the edge magnetic conductive plate, the first voice coil and the second voice coil are connected with the second connecting portion, the bending portion extends along the first direction, the bending portion comprises a first bending segment, and the side wall of the diaphragm protrudes to form the first bending segment along a second direction perpendicular to the first direction.

8. The sound producing monomer of claim 1, wherein, The first magnetic gap and the second magnetic gap are arranged in a second direction, the elastic support comprises a first centering support piece and a second centering support piece, one end of the first centering support piece is connected with the magnetic circuit system, the first voice coil and the second voice coil are connected with the other end of the first centering support piece, one end of the second centering support piece is connected with the magnetic circuit system, the first voice coil and the second voice coil are connected with the other end of the second centering support piece, the first centering support piece and the second centering support piece are arranged in a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the magnetic assembly comprises a first magnetic piece and a second magnetic piece, the first magnetic piece is arranged on the side of the first centering support piece away from the diaphragm, and the second magnetic piece is arranged on the side of the second centering support piece away from the diaphragm.

9. The sound producing monomer of claim 8, wherein, The first centering support piece comprises a first fixed portion, two first elastic arm portions and two first mounting portions, the two first elastic arm portions are arranged at two ends of the first fixed portion respectively, the first mounting portions are arranged in one-to-one correspondence with the first elastic arm portions, each first mounting portion is connected with the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the first fixed portion, and the first magnetic piece is arranged on the other side of the first fixed portion. The second centering vane comprises a second fixed part, two second elastic arm parts and two second mounting parts, the two second elastic arm parts are respectively arranged at two ends of the second fixed part, the second mounting parts are arranged in one-to-one correspondence with the second elastic arm parts, each second mounting part is connected with the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the second fixed part, and the second magnetic member is arranged on the other side of the second fixed part.

10. The sound producing monomer of any one of claims 1 to 9, wherein, The magnetic circuit system comprises a magnet unit and a magnetic yoke, the magnetic yoke is arranged on the side of the magnet unit away from the diaphragm, the magnet unit is formed with the first magnetic gap and the second magnetic gap, a leakage hole is formed between the magnetic yoke and the magnet unit, and the sound production unit further comprises a back cover, and the back cover is provided with an isolation mesh hole in communication with the leakage hole.

11. A sound production module, comprising: The sound production module comprises a shell and the sound production unit as claimed in any one of claims 1 to 10, and the sound production unit is arranged in the shell.

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