Sound production monomer and sound production module

Abstract

The invention discloses a sound production monomer and a sound production module, and relates to the technical field of sound energy conversion, the sound production monomer comprises a magnetic circuit system, a vibration system, a magnetic assembly and an elastic support member, and the magnetic circuit system forms a first magnetic gap and a second magnetic gap; the vibration system vibrates in the first direction and comprises a vibrating 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 vibrating diaphragm, and the current directions of the first voice coil and the second voice coil are the same; one end of the elastic supporting piece 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 supporting piece, the magnetic assembly is arranged on the elastic supporting piece, and the magnetic assembly can provide acting force opposite to the restoring force of the vibrating diaphragm for the first voice coil and the second voice coil; by adding the magnetic assembly, the performance of the sounding monomer is improved.

Description

Technical Field

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

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

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

[0004] To achieve the above object, the sound-emitting unit proposed in the present invention comprises:

[0005] A magnetic circuit system, wherein the magnetic circuit system is formed with a first magnetic gap and a second magnetic gap;

[0006] A vibration system, wherein the vibration system vibrates in a first direction, the vibration system 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 to the diaphragm, and the current directions of the first voice coil and the second voice coil are the same;

[0007] Magnetic components;

[0008] An elastic support member, 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, and the magnetic component is arranged on the elastic support member, and the magnetic component can provide the first voice coil and the second voice coil with a force in the opposite direction to the restoring force of the diaphragm.

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

[0010] In one embodiment, the bending portion also includes a second bending section, one end of the first bending section is connected to the first connecting portion, the other end of the first bending section is connected to the second bending section, and one end of the second bending section away from the first bending section is connected to the second connecting portion, the first bending section and the second bending section are arranged in sequence along the first direction, and the second bending section is bent along the second direction.

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

[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 the first voice coil and the second voice coil are both 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 arranged on the side of the magnet unit away from the diaphragm, the magnet unit includes a central magnetic circuit, an intermediate magnetic circuit arranged on the periphery of the central magnetic circuit, and a side magnetic circuit arranged on the periphery of the intermediate magnetic circuit, the intermediate magnetic circuit includes a first intermediate magnetic circuit and a second intermediate magnetic circuit respectively arranged on both sides of the central magnetic circuit along the second direction, 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 an avoidance hole corresponding to the magnetic component.

[0014] In one embodiment, the central magnetic circuit includes a central magnet and a central magnetic conductive plate, the first intermediate magnetic circuit includes a first intermediate magnet and a first intermediate magnetic conductive plate, the second intermediate magnetic circuit includes a second intermediate magnet and a second intermediate magnetic conductive plate, and the side magnetic circuit includes a side magnet and a side magnetic conductive plate. The central magnetic conductive plate is arranged on the side of the central 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, and the side magnetic conductive plate is arranged 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 the magnetization direction of the side magnet, and the magnetization directions of the first intermediate magnet and the second intermediate magnet are opposite to the magnetization direction of the central magnet.

[0015] In one embodiment, the edge magnetic conductive plate is annular, the diaphragm includes 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 to the edge magnetic conductive plate, the first voice coil and the second voice coil are both connected to the second connecting portion, the bending portion extends along the first direction, the bending portion includes a first bending section, the side periphery of the diaphragm protrudes along the second direction to form the first bending section, 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 the second direction, the elastic support member includes a first centering support plate and a second centering support plate, one end of the first centering support plate 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 plate, one end of the second centering support plate 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 plate, the first centering support plate and the second centering support plate are spaced apart along the third direction, the first direction, the second direction and the third direction are perpendicular to each other, the magnetic assembly includes a first magnetic component and a second magnetic component, the first magnetic component is arranged on a side of the first centering support plate away from the diaphragm, and the second magnetic component is arranged on a side of the second centering support plate away from the diaphragm.

[0017] In one embodiment, the first centering support comprises a first fixing portion, two first elastic arms and two first mounting portions, the two first elastic arms are respectively arranged at two ends of the first fixing portion, the first mounting portions are arranged in one-to-one correspondence with the first elastic arms, each of the first mounting portions is connected to the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the first fixing portion, and the first magnetic member is arranged on the other side of the first fixing portion;

[0018] The second centering support plate includes a second fixing portion, two second elastic arm portions and two second mounting portions, the two second elastic arm portions are respectively arranged at two ends of the second fixing portion, the second mounting portion is arranged in a one-to-one correspondence with the second elastic arm portions, each second mounting portion is connected to the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the second fixing portion, and the second magnetic member is arranged on the other side of the second fixing portion.

[0019] In one embodiment, the magnetic circuit system includes 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 forms the first magnetic gap and the second magnetic gap, the sound unit also includes a back cover, a leakage hole is formed between the magnetic yoke and the magnet unit, and the back cover is provided with an isolation mesh hole corresponding to the leakage hole.

[0020] The present invention further proposes a sound module, characterized in that the sound module comprises a shell and the above-mentioned sound unit, and the sound unit is arranged in the shell.

[0021] The technical solution of the present invention is to arrange a magnetic component on an elastic support member, and the magnetic component will be affected by a static magnetic force. When the resultant force of the static magnetic force on the magnetic component is zero, it is a balanced position. When the first voice coil and the second sound cavity vibrate upward from the balanced position, the direction of the resultant force of the static magnetic force on the magnetic component is also upward, and the force will act on the first voice coil and the second voice coil 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 voice coil and the second voice coil, the driving force of the first voice coil and the second voice coil on the diaphragm is effectively increased, thereby effectively improving the performance of the sound unit; similarly, when the first voice coil and the second sound cavity vibrate downward from the balanced position, the direction of the resultant force of the static magnetic force on the magnetic component is also downward, and the force will act on the first voice coil and the second voice coil 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 voice coil and the second voice coil, the driving force of the first voice coil and the second voice coil on the diaphragm is effectively increased, thereby effectively improving the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

[0024] Figure 2 A schematic structural diagram of another perspective of an embodiment of a sound-emitting unit provided by the present invention;

[0025] Figure 3 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

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

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

[0028] Figure 6 A schematic diagram of the exploded structure of a part of an embodiment of a sound-emitting unit provided by the present invention;

[0029] Figure 7 A curve diagram showing the variation trend of the effective vibration area of ​​the diaphragm of an embodiment of a sound-emitting unit provided by the present invention with respect to the amplitude;

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

[0031] Fig. 9 A schematic diagram of the simulation of the state of the front cavity when the diaphragm of an embodiment of the sound-emitting unit provided by the present invention is in a balanced position;

[0032] Fig.10 This is a schematic diagram of the simulation of the state of the front cavity when the diaphragm of an embodiment of the sound-emitting unit provided by the present invention vibrates downward.

[0033] Description of Figure Numbers:

[0034] 100, sound unit; 1, magnetic circuit system; 11, magnet unit; 111, center magnetic circuit; 1111, center magnet; 1112, center magnetic plate; 112, intermediate magnetic circuit; 1121, first intermediate magnetic circuit; 11211, first intermediate magnet; 11212, first intermediate magnetic plate; 1122, second intermediate magnetic circuit; 11221, second intermediate magnet; 11222, second intermediate magnetic plate; 113, side magnetic circuit; 1131, side magnet; 1132, side magnetic plate; 114, first magnetic gap; 115, second magnetic gap; 12, magnetic yoke; 121, avoidance 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, reinforcement part; 22, first voice coil; 23, second voice coil; 3, magnetic assembly; 31, first magnetic member; 32, second magnetic member; 4, elastic support member; 41, first centering support plate; 411, first fixing part; 412, first mounting part; 413, first elastic arm part; 42, second centering support plate; 421, second fixing part; 422, second mounting part; 423, second elastic arm part; 5, rear cover; 51, isolation mesh; 6, front cavity.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] As smart products become thinner, the limited internal space poses a great challenge to the acoustic performance of speakers. If the size of the speaker is reduced, the performance of the speaker will be weakened, because the means of improving the performance of traditional speakers is usually to increase the volume of the magnet to obtain better performance, but the use of large-volume magnets will cause the size of the speaker to increase, resulting in the speaker being unable to meet the size requirements. However, if the size of the speaker is reduced, the space inside the speaker will also decrease, that is, the space for accommodating the magnet may also decrease. In the case of insufficient space, only smaller magnets can be used, but the reduction in the volume of the magnet will cause the performance of the speaker to even fail to meet the requirements of the entire machine.

[0040] In view of this, it is necessary to propose a sound unit and a sound module to solve the problem of how to enhance the performance of the speaker.

[0041] See also Figures 1 to 3 In one embodiment of the present invention, the sound-emitting unit 100 includes a magnetic circuit system 1, a vibration system 2, a magnetic component 3 and an elastic support member 4, the magnetic circuit system 1 is formed with a first magnetic gap 114 and a second magnetic gap 115; the vibration system 2 vibrates along a first direction, the vibration system 2 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, the second voice coil 23 is located in the second magnetic gap 115, the first voice coil 22 and the second voice coil 23 are both 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 member 4 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 elastic support member 4, the magnetic component 3 is arranged on the elastic support member 4, and the magnetic component 3 can provide the first voice coil 22 and the second voice coil 23 with a force opposite to the restoring force of the diaphragm 21.

[0042] The sound-emitting monomer 100 of the present invention may be a loudspeaker monomer, and the sound-emitting monomer 100 may be applied to a sound module of an electronic device, and the electronic device may be a computer, a mobile phone, a smart wearable device, etc. This embodiment is described by taking the sound-emitting monomer 100 as a loudspeaker monomer as an example.

[0043] See also Figure 1 , Figure 3 and Figure 4 The technical solution of the present invention is to arrange the magnetic component 3 on the elastic support 4, and the magnetic component 3 will be affected by the 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 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 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 is increased, thereby effectively improving the performance of the sound unit 100; similarly, when the first voice coil 22 and the second voice coil 23 vibrate downward from the equilibrium position, the direction of the resultant force of the static magnetic force on the magnetic component 3 is also downward, and the force will act 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 unit 100. It should be noted that the magnetic component 3 can be a permanent magnetic material component, such as ferrite, precious metal alloy, etc.; the magnetic component 3 can also be a magnetic conductive material component; the magnetic component 3 can also be a soft magnetic material component, such as pure iron, nickel, etc. It should also be noted that an elastic support member 4 is connected to the first voice coil 22 and the second voice coil 23, so as to center and support 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 polarizing 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 perform reciprocating cutting magnetic lines of force in the first magnetic gap 114 and the second magnetic gap 115 respectively, driving the diaphragm 21 to vibrate up and down, thereby instigating the air to make sound and completing the energy conversion between electricity and sound.

[0045] According to one embodiment of the present invention, the elastic support member 4 includes an annular fixing portion, a mounting portion and an elastic arm portion connecting the annular fixing portion and the mounting portion, the mounting portion 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 portion; the elastic support member 4 is an integral structural member, and therefore has better supporting stability for the first voice coil 22 and the second voice coil 23, and the use of the elastic support member 4 can also facilitate wiring.

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

[0047] See also Figure 4 and Figure 5 In one embodiment, the diaphragm 21 includes a first connection portion 211, a second connection portion 212, and a bending portion 213 connecting the first connection portion 211 and the second connection portion 212. The first connection portion 211 is connected to the magnetic circuit system 1, the first voice coil 22 and the second voice coil 23 are both connected to the second connection portion 212, the bending portion 213 extends along a first direction, the bending portion 213 includes a first bending section 2131, and the side of the diaphragm 21 is raised along a second direction to form the first bending section 2131, and the second direction is perpendicular to the first direction. By providing the first bending section 2131, the diaphragm 21 has a tendency that the amplitude is large in the low-frequency region and the effective vibration area of ​​the diaphragm 21 becomes small, and a tendency that the amplitude is small in the medium-frequency region and the effective vibration area of ​​the diaphragm 21 becomes large, thereby enhancing the sensitivity of the sound-emitting unit 100 in low and medium frequencies.

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

[0049] See also Figure 5In one embodiment, the bending direction of the first bending section 2131 is opposite to the bending direction of the second bending section 2132. That is, if the first bending section 2131 is bent outward, the second bending section 2132 is bent inward, so as to prevent the first bending section 2131 and the second bending section 2132 from interfering with each other during the downward vibration of the diaphragm 21. Moreover, the first bending section 2131 and the second bending section 2132 are bent in opposite directions, so that the diaphragm 21 has a tendency of large amplitude in the low-frequency region and small effective vibration area of ​​the diaphragm 21, and a tendency of small amplitude in the medium-frequency region and large effective vibration area of ​​the diaphragm 21, which further enhances the sensitivity of the sound-emitting unit 100 in the low-frequency and medium-frequency regions. It should be noted that, please refer to Figures 7 to 10 By simulating the relationship between the volume change and displacement of the front cavity 6 when the vibration system 2 vibrates, the variation trend of the effective vibration area of ​​the diaphragm 21 with the amplitude can be calculated.

[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 bending section 2132, the other end of the arc-shaped transition section 2121 is connected to the connecting section 2122, and 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 bending section 2132 and the connecting section 2122.

[0051] See also 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 arranged 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 arranged on the periphery of the central magnetic circuit 111, and a side magnetic circuit 113 arranged on the periphery of the intermediate magnetic circuit 112. The intermediate magnetic circuit 112 includes a first intermediate magnetic circuit 1121 and a second intermediate magnetic circuit 1122 respectively arranged on both sides of the central magnetic circuit 111 along the second direction. The first magnetic gap 114 surrounds the first intermediate magnetic circuit 1121, and the 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 an avoidance hole 121 corresponding to the magnetic component 3. The magnetic yoke 12 is provided for magnetism, thereby ensuring that the first magnetic gap 114 and the second magnetic gap 115 have sufficient magnetic flux; the avoidance hole 121 is provided on the magnetic yoke to avoid the magnetic component 3, thereby ensuring that the elastic support part 4 and the voice coil assembly have sufficient downward vibration space, which helps to improve the performance of the sound unit 100, and the size of the static magnetic force on the magnetic component 3 can be changed by adjusting the size of the avoidance hole 121, so that the size of the static magnetic force on the magnetic component 3 can be adjusted.

[0052] See also Figures 4 to 6In one embodiment, the central magnetic circuit 111 includes a central magnet 1111 and a central magnetic conductive plate 1112, the first intermediate magnetic circuit 1121 includes a first intermediate magnet 11211 and a first intermediate magnetic conductive plate 11212, the second intermediate magnetic circuit 1122 includes a second intermediate magnet 11221 and a second intermediate magnetic conductive plate 11222, the side magnetic circuit 113 includes a side magnet 1131 and a side magnetic conductive plate 1132, the central magnetic conductive plate 1112 is arranged on the side of the central magnet 1111 facing the diaphragm 21, and the first intermediate magnetic conductive plate 11212 is arranged on the side of the first intermediate magnet 11211 facing the diaphragm On one side of the diaphragm 21, the second intermediate magnetic conductive plate 11222 is arranged on the side of the second intermediate magnet 11221 facing the diaphragm 21, and the side magnetic conductive plate 1132 is arranged 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 the first direction. The magnetization direction of the central magnet 1111 is the same as the magnetization direction of the side magnet 1131. The magnetization directions of the first intermediate magnet 11211 and the second intermediate magnet 11221 are opposite to the magnetization direction of the central magnet 1111. By arranging the central magnetic conductive plate 1112, the first intermediate magnetic conductive plate 11212, the second intermediate magnetic conductive plate 11222 and the side magnetic conductive plate 1132 for magnetization, it is ensured that the first magnetic gap 114 and the second magnetic gap 115 have sufficient magnetic flux.

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

[0054] See also 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 assembly 3 includes a first magnetic member 31 and a second magnetic member 32, the first magnetic member 31 is arranged on the side of the first centering support plate 41 away from the diaphragm 21, and the second magnetic member 32 is arranged on the side of the second centering support plate 42 away from the diaphragm 21. Compared with using an integral centering support plate, using two independent first centering support plates 41 and second centering support plates 42 saves the connection structure between the first centering support plate 41 and the second centering support plate 42, so the cost is lower. Figure 5 The up and down directions shown, the second direction is Figure 5 The left and right directions shown, the third direction is Figure 4 Front-to-back orientation shown.

[0055] In one embodiment, the first centering support 41 includes a first fixing portion 411, two first elastic arms 413 and two first mounting portions 412, the two first elastic arms 413 are respectively arranged at both ends of the first fixing portion 411, the first mounting portions 412 and the first elastic arms 413 are arranged one by one, each first mounting portion 412 is connected to the magnetic circuit system 1, the first voice coil 22 and the second voice coil 23 are arranged on one side of the first fixing portion 411, and the first magnetic member 31 is arranged on the first fixing portion 411. On the other side; the second centering support plate 42 includes a second fixed portion 421, two second elastic arms 423 and two second mounting portions 422. The two second elastic arms 423 are respectively arranged at the two ends of the second fixed portion 421. The second mounting portions 422 and the second elastic arms 423 are arranged one by one. Each second mounting portion 422 is connected to the magnetic circuit system 1. The first voice coil 22 and the second voice coil 23 are arranged on one side of the second fixed portion 421, and the second magnetic member 32 is arranged on the other side of the second fixed portion 421. Specifically, the first mounting portion 412 and the second mounting portion 422 are both connected to the side magnetic conductive plate 1132, the first fixed portion 411 is connected to the first voice coil 22 and the second voice coil 23, and the second fixed portion 421 is connected to the first voice coil 22 and the second voice coil 23, and plays the role of centering and supporting 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 polarizing 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 avoidance spaces corresponding to the first elastic arm portion 413 and the second elastic arm portion 423 .

[0056] According to an embodiment of the present invention, a first pad and a second pad are provided on the elastic support member 4, 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 the circuit board connected to the voice coil, the sound unit 100 of this embodiment eliminates the circuit board structure by providing the first pad and the second pad on the elastic support member 4, which helps to reduce the thickness of the sound unit 100.

[0057] See also 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 arranged on the side of the magnet unit 11 away from the diaphragm 21, the magnet unit 11 is formed with a first magnetic gap 114 and a second magnetic gap 115, and the sound unit 100 also includes a back cover 5, a leakage hole is arranged on the magnetic yoke 12, and an isolation mesh 51 corresponding to the leakage hole is arranged on the back 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 the leakage hole is arranged on the back cover 5. By opening the isolation mesh 51 on the back cover 5 to communicate with the leakage hole, the air pressure is balanced. It can be understood that the back cover 5 can cover the leakage hole and the avoidance hole 121 arranged on the magnetic yoke at the same time. It should be noted that the back cover 5 is a metal back cover.

[0058] According to one embodiment of the present invention, the back cover 5 protrudes in a direction away from the diaphragm 21 to form an avoidance groove, the notch of the avoidance groove faces the avoidance hole 121, and the avoidance 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] The present invention also proposes a sound module, which includes a housing and the above-mentioned sound unit 100, the sound unit 100 is arranged in the housing, and the sound module can be a speaker module. The sound module can be applied to electronic devices such as computers, mobile phones, and smart wearable devices. Since the sound module adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0060] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: A magnetic circuit system, wherein the magnetic circuit system is formed with a first magnetic gap and a second magnetic gap; A vibration system, wherein the vibration system vibrates in a first direction, the vibration system 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 to the diaphragm, and the current directions of the first voice coil and the second voice coil are the same; Magnetic components; An elastic support member, 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, and the magnetic component is arranged on the elastic support member, and the magnetic component can provide the first voice coil and the second voice coil with a force in the opposite direction to the restoring force of the diaphragm.

2. The sound-emitting unit according to claim 1, characterized in that: The diaphragm includes 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 to the magnetic circuit system, the first voice coil and the second voice coil are both connected to the second connecting part, the bending part extends along the first direction, the bending part includes a first bending section, the side periphery of the diaphragm protrudes along the second direction to form the first bending section, and the second direction is perpendicular to the first direction.

3. The sound-emitting unit according to claim 2, characterized in that: The bending portion further includes a second bending section, the first bending section and the second bending section are arranged in sequence along the first direction, one end of the first bending section is connected to the first connecting portion, and the other end of the first bending section is connected to the second bending section.

4. The sound-emitting unit according to claim 3, characterized in that: The second bending section is bent along the second direction, and the bending direction of the first bending section is opposite to the bending direction of the second bending section; 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 the first voice coil and the second voice coil are both connected to the connecting section.

5. The sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system includes 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 includes a central magnetic circuit, an intermediate magnetic circuit arranged on the peripheral side of the central magnetic circuit, and a side magnetic circuit arranged on the peripheral side of the intermediate magnetic circuit, the intermediate magnetic circuit includes a first intermediate magnetic circuit and a second intermediate magnetic circuit respectively arranged on both sides of the central magnetic circuit along the second direction, 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 an avoidance hole corresponding to the magnetic component.

6. The sound-emitting unit according to claim 5, characterized in that: The central magnetic circuit includes a central magnet and a central magnetic conductive plate, the first intermediate magnetic circuit includes a first intermediate magnet and a first intermediate magnetic conductive plate, the second intermediate magnetic circuit includes a second intermediate magnet and a second intermediate magnetic conductive plate, and the side magnetic circuit includes a side magnet and a side magnetic conductive plate. The central magnetic conductive plate is arranged on the side of the central 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, and the side magnetic conductive plate is arranged 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 the magnetization direction of the side magnet, and the magnetization directions of the first intermediate magnet and the second intermediate magnet are opposite to the magnetization direction of the central magnet.

7. The sound-emitting unit according to claim 6, characterized in that: The edge magnetic conductive plate is annular, and the diaphragm includes 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 to the edge magnetic conductive plate, the first voice coil and the second voice coil are both connected to the second connecting portion, the bending portion extends along the first direction, the bending portion includes a first bending section, the side periphery of the diaphragm protrudes along the second direction to form the first bending section, and the second direction is perpendicular to the first direction.

8. The sound-emitting unit according to claim 1, characterized in that: The first magnetic gap and the second magnetic gap are arranged at intervals along the second direction, the elastic support member includes a first centering support plate and a second centering support plate, one end of the first centering support plate 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 plate, one end of the second centering support plate 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 plate, the first centering support plate and the second centering support plate are arranged at intervals along the third direction, the first direction, the second direction and the third direction are perpendicular to each other, the magnetic assembly includes a first magnetic component and a second magnetic component, the first magnetic component is arranged on a side of the first centering support plate away from the diaphragm, and the second magnetic component is arranged on a side of the second centering support plate away from the diaphragm.

9. The sound-emitting unit according to claim 8, characterized in that: The first centering support comprises a first fixing portion, two first elastic arms and two first mounting portions, the two first elastic arms are respectively arranged at two ends of the first fixing portion, the first mounting portions are arranged in one-to-one correspondence with the first elastic arms, each of the first mounting portions is connected to the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the first fixing portion, and the first magnetic member is arranged on the other side of the first fixing portion; The second centering support plate includes a second fixing portion, two second elastic arm portions and two second mounting portions, the two second elastic arm portions are respectively arranged at two ends of the second fixing portion, the second mounting portion is arranged in a one-to-one correspondence with the second elastic arm portions, each second mounting portion is connected to the magnetic circuit system, the first voice coil and the second voice coil are arranged on one side of the second fixing portion, and the second magnetic member is arranged on the other side of the second fixing portion.

10. The sound-emitting unit according to any one of claims 1 to 9, characterized in that: The magnetic circuit system includes 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 forms 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 unit also includes a back cover, and the back cover is provided with an isolation mesh hole corresponding to the leakage hole.

11. A sound module, characterized in that: The sound module comprises a housing and a sound unit as described in any one of claims 1 to 10, wherein the sound unit is arranged in the housing.

Images