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 and a vibration system, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap which are arranged at an interval along a second direction; the vibration system vibrates in the first direction, the first direction is perpendicular to the second direction, the vibration system comprises a vibrating diaphragm, a first voice coil, a second voice coil and a magnetic assembly, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, one side of the first voice coil is connected with the vibrating diaphragm, and the other side of the first voice coil is connected with the magnetic assembly. One side of the second voice coil is connected with the vibrating diaphragm, the other side of the second voice coil is connected with the magnetic assembly, the current directions of the first voice coil and the second voice coil are the same, and the magnetic assembly can provide acting force opposite to the restoring force direction of the vibrating diaphragm for the first voice coil and the second voice coil, so that the driving force of the first voice coil and the second voice coil to the vibrating diaphragm is effectively increased; and 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, the vibration system comprising a diaphragm, a first voice coil, a second voice coil and a magnetic assembly, the first voice coil being located in the first magnetic gap, the second voice coil being located in the second magnetic gap, one side of the first voice coil being connected to the diaphragm, the other side of the first voice coil being connected to the magnetic assembly, one side of the second voice coil being connected to the diaphragm, the other side of the second voice coil being connected to the magnetic assembly, the current directions of the first voice coil and the second voice coil being the same, and the magnetic assembly being capable of providing the first voice coil and the second voice coil with a force opposite to the direction of the diaphragm restoring force.

[0007] In one embodiment, the magnetic circuit system includes a magnetic circuit unit and a magnetic yoke, the magnetic circuit unit forms the first magnetic gap and the second magnetic gap, the side of the magnetic circuit unit facing away from the diaphragm is arranged on the magnetic yoke, and the magnetic yoke is provided with an avoidance hole corresponding to the magnetic component.

[0008] In one embodiment, the magnetic assembly includes a first magnetic component and a second magnetic component, the first magnetic component is connected to the first voice coil, the second magnetic component is connected to the second voice coil, and the avoidance hole includes a first avoidance hole and a second avoidance hole, the first avoidance hole avoids the first magnetic component, and the second avoidance hole avoids the second magnetic component.

[0009] In one embodiment, the magnetic yoke includes a central magnetic yoke and a side magnetic yoke, the central magnetic yoke is spaced from the side magnetic yoke, the first avoidance hole is arranged at the central magnetic yoke and / or between the central magnetic yoke and the side magnetic yoke, and the second avoidance hole is arranged at the central magnetic yoke and / or between the central magnetic yoke and the side magnetic yoke.

[0010] In one embodiment, the first magnetic member is annular, and the first avoidance hole is annular;

[0011] And / or, the second magnetic member is annular, and the second avoidance hole is annular.

[0012] In one embodiment, the number of the first magnetic members is multiple, and the multiple first magnetic members are arranged at intervals along the circumference of the first voice coil, and the number of the first avoidance holes is consistent with that of the first magnetic members and are arranged in a one-to-one correspondence;

[0013] And / or, there are multiple second magnetic components, the multiple second magnetic components are arranged at intervals along the circumference of the second voice coil, and the number of the second avoidance holes is consistent with that of the second magnetic components and is arranged in a one-to-one correspondence.

[0014] In one embodiment, the sound unit further includes a back cover, the back cover is arranged on a side of the magnetic yoke away from the diaphragm, the back cover protrudes in a direction away from the diaphragm to form an avoidance groove, and the avoidance groove is arranged corresponding to the avoidance hole;

[0015] And / or, a leakage hole is arranged on the magnetic yoke, and an isolation mesh hole corresponding to and connected to the leakage hole is arranged on the back cover.

[0016] In one embodiment, the vibration system vibrates along a first direction, the first magnetic gap and the second magnetic gap are spaced apart along the second direction, the first direction and the second direction are perpendicular to each other, the magnetic circuit 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 magnetization direction of the magnet of the central magnetic circuit is the same as the magnetization direction of the magnet of the side magnetic circuit, the magnetization direction of the magnet of the first intermediate magnetic circuit and the magnetization direction of the magnet of the second intermediate magnetic circuit are both opposite to the magnetization direction of the magnet of the central magnetic circuit, the first magnetic gap surrounds the first intermediate magnetic circuit, and the second magnetic gap surrounds the second intermediate magnetic circuit.

[0017] 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 magnet, the first intermediate magnet, the second intermediate magnet and the side magnet are all magnetized along the first direction, the central magnet and the side magnet have the same magnetization direction, the first intermediate magnet and the second intermediate magnet are both opposite to the magnetization direction of the central magnet, the central magnetic conductive plate, the first intermediate magnetic conductive plate and the side magnetic conductive plate form the first magnetic gap, and the central magnetic conductive plate, the second intermediate magnetic conductive plate and the side magnetic conductive plate form the second magnetic gap.

[0018] In one embodiment, the sound unit also includes a shell and an elastic support member, the vibration system and the magnetic circuit system are respectively connected to the two ends of the shell, the outer periphery of the diaphragm is connected to the shell, one end of the elastic support member is connected to the shell, and the first voice coil and the second voice coil are both connected to the other end of the elastic support member.

[0019] In one embodiment, the elastic support member includes a first centering support piece and a second centering support piece, the first centering support piece and the second centering support piece are arranged at intervals along a direction perpendicular to the second direction, the first centering support piece includes a first fixing portion, two first elastic arm portions and two first mounting portions, the two first elastic arm portions are respectively arranged at two ends of the first fixing portion, the first mounting portion and the first elastic arm portions are arranged one-to-one, each of the first mounting portions is connected to the housing, and the first fixing portion is connected to the first voice coil and the second voice coil;

[0020] 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 two second mounting portions are respectively arranged corresponding to one second elastic arm portion, each second mounting portion is connected to the shell, and the second fixing portion is connected to the first voice coil and the second voice coil.

[0021] In one embodiment, a pad component is provided on the first centering support plate and the second centering support plate, and the pad component includes a first pad, a second pad, a third pad and a fourth pad, the first pad and the third pad are arranged on the first fixing portion, the second pad and the fourth pad are arranged on the second fixing portion, the first pad and the second pad are both electrically connected to the first voice coil, and the third pad and the fourth pad are both electrically connected to the second voice coil.

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

[0023] The technical solution of the present invention drives the diaphragm to vibrate through the first voice coil and the second voice coil, and the current directions of the first voice coil and the second voice coil are the same, and the driving force directions generated are also the same. The diaphragm vibration driven by the first voice coil and the second voice coil has better performance than the single voice coil speaker; and, by arranging the first voice coil and the second voice coil on the side away from the diaphragm on the magnetic component, the magnetic component will be affected by the static magnetic force. When the position of the magnetic component is the equilibrium position, the resultant force of the static magnetic force on the magnetic component is zero. At this time, if the first voice coil and the second voice coil vibrate upward from the equilibrium position, the magnetic component moves upward with the first voice coil and the second voice coil. At this time, the magnetic component The direction of the resultant static magnetic forces on the magnetic component is upward, and the direction of the resultant static magnetic forces on the magnetic component is consistent with the vibration direction of the first voice coil and the second voice coil, thereby effectively increasing the driving force of the first voice coil and the second voice coil on the diaphragm and improving the performance of the sound unit; similarly, if the first voice coil and the second voice coil vibrate downward from the equilibrium position, the magnetic component moves downward with the first voice coil and the second voice coil, and the direction of the resultant static magnetic forces on the magnetic component is downward, and the direction of the resultant static magnetic forces on the magnetic component is consistent with the vibration direction of the first voice coil and the second voice coil, which also effectively increases the driving force of the first voice coil and the second voice coil on the diaphragm and improves the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0028] Figure 4 A schematic diagram of the decomposed structure of an embodiment of a sound-emitting unit provided by the present invention;

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

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

[0031] Figure 7 A cross-sectional schematic diagram of a partial structure of another embodiment of a sound-emitting unit provided by the present invention;

[0032] Figure 8 A schematic diagram of the decomposed structure of another embodiment of the sound-emitting unit provided by the present invention;

[0033] Fig. 9 A schematic cross-sectional structure diagram of another embodiment of a sound-emitting unit provided by the present invention;

[0034] Fig.10 A schematic structural diagram of a first voice coil, a second voice coil and an elastic support member provided by the present invention;

[0035] Fig.11 A schematic structural diagram of the first voice coil, the second voice coil and the elastic support member provided by the present invention from another perspective.

[0036] Description of Figure Numbers:

[0037] 100, sound unit; 1, magnetic circuit system; 11, magnetic circuit 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; 12, magnetic yoke; 121, center magnetic yoke; 122, side magnetic yoke; 1221, leakage hole; 123, avoidance hole; 1231, first avoidance hole; 1232, second avoidance hole; 131, first magnetic gap; 132, first Two magnetic gaps; 2. Vibration system; 21. Diaphragm; 211. Reinforcement part; 22. First voice coil; 221. First annular voice coil; 23. Second voice coil; 231. Second annular voice coil; 24. Magnetic assembly; 241. First magnetic part; 242. Second magnetic part; 3. Back cover; 31. Avoidance groove; 32. Isolation mesh; 4. Shell; 5. Elastic support member; 51. First centering support plate; 511. First fixing part; 512. First elastic arm part; 513. First mounting part; 52. Second centering support plate; 521. Second fixing part; 522. Second elastic arm part; 523. Second mounting part; 53. Pad component; 531. First pad; 532. Second pad; 533. Third pad; 534. Fourth pad.

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] See also Figures 4 to 7 In one embodiment of the present invention, the sound unit 100 includes a magnetic circuit system 1 and a vibration system 2, the magnetic circuit system 1 is formed with a first magnetic gap 131 and a second magnetic gap 132; the vibration system 2 includes a diaphragm 21, a first voice coil 22, a second voice coil 23 and a magnetic component 24, the first voice coil 22 is located in the first magnetic gap 131, the second voice coil 23 is located in the second magnetic gap 132, one side of the first voice coil 22 is connected to the diaphragm 21, the other side of the first voice coil 22 is connected to the magnetic component 24, one side of the second voice coil 23 is connected to the diaphragm 21, the other side of the second voice coil 23 is connected to the magnetic component 24, the current directions of the first voice coil 22 and the second voice coil 23 are the same, and the magnetic component 24 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.

[0045] 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.

[0046] The technical solution of the present invention drives the diaphragm 21 to vibrate by using the first voice coil 22 and the second voice coil 23, and the current directions of the first voice coil 22 and the second voice coil 23 are the same, and the driving force directions generated are also the same. The diaphragm 21 is driven to vibrate by the first voice coil 22 and the second voice coil 23, so as to have better performance than a single voice coil speaker. In addition, by arranging the first voice coil 22 and the second voice coil 23 on the side away from the diaphragm 21 on the magnetic component 24, the magnetic component 24 will be affected by the static magnetic force. When the position of the magnetic component 24 is the equilibrium position, the resultant force of the static magnetic force on the magnetic component 24 is zero. At this time, if the first voice coil 22 and the second voice coil 23 vibrate upward from the equilibrium position, the magnetic component 24 moves upward with the first voice coil 22 and the second voice coil 23. At this time, the magnetic component The resultant direction of the static magnetic forces on the magnetic component 24 is upward, and the direction of the resultant force of the static magnetic forces on the magnetic component 24 is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, thereby effectively increasing the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, and improving the performance of the sound unit 100; similarly, if the first voice coil 22 and the second voice coil 23 vibrate downward from the equilibrium position, the magnetic component 24 moves downward with the first voice coil 22 and the second voice coil 23, and the direction of the resultant force of the static magnetic forces on the magnetic component 24 is downward, and the direction of the resultant force of the static magnetic forces on the magnetic component 24 is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, which also effectively increases the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, and improves the performance of the sound unit 100.

[0047] According to one embodiment of the present invention, the first magnetic gap 131 and the second magnetic gap 132 are nested, the first magnetic gap 131 is located on the inner side of the second magnetic gap 132, the second magnetic gap 132 is arranged on the peripheral side of the first magnetic gap 131 and is spaced apart from the first magnetic gap 131, and accordingly, the second voice coil 23 is arranged on the peripheral side of the first voice coil 22 and is spaced apart from the first voice coil 22. This arrangement makes the structure of the magnetic circuit system 1 more compact.

[0048] According to another embodiment of the present invention, the vibration system 2 vibrates along a first direction, and the first magnetic gap 131 and the second magnetic gap 132 are spaced apart along a second direction, wherein the first direction and the second direction are perpendicular, and correspondingly, the first voice coil 22 and the second voice coil 23 are also spaced apart along the second direction. Figure 5 The up and down directions shown, the second direction is Figure 5 Left and right directions shown.

[0049] 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 make reciprocating cutting magnetic lines of force in the first magnetic gap 131 and the second magnetic gap 132, 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.

[0050] According to an embodiment of the present invention, the magnetic component 24 includes a first magnetic conductive part, a second magnetic conductive part and a connecting part, one end of the connecting part is connected to the first magnetic conductive part, and the other end of the connecting part is connected to the second magnetic conductive part. The first magnetic conductive part is arranged on the side of the first voice coil 22 away from the diaphragm 21, and the second magnetic conductive part is arranged on the side of the second voice coil 23 away from the diaphragm 21, wherein the connecting part can be a magnetic conductive part or a non-magnetic conductive part; the first magnetic conductive part and the second magnetic conductive part are connected by the connecting part, so as to improve the synchronization of the vibration of the first voice coil 22 and the second voice coil 23. It should be noted that the first magnetic conductive part and the second magnetic conductive part can be permanent magnetic material parts, such as ferrite, precious metal alloy, etc.; the first magnetic conductive part and the second magnetic conductive part can also be magnetic conductive material parts; the first magnetic conductive part and the second magnetic conductive part can also be soft magnetic material parts, such as pure iron, nickel, etc. It should be noted that the magnetic component 24 is an annular magnetic part.

[0051] See also Figure 4 and Figure 5 According to another embodiment of the present invention, a reinforcement portion 211 is provided on the diaphragm 21. By providing the reinforcement portion 211, the sound unit 100 has better directivity and transient response in the reproduction of high-frequency signals.

[0052] According to another embodiment of the present invention, the first voice coil 22 includes at least two first annular voice coils 221 nested in sequence and arranged in sequence along the first direction, and the second voice coil 23 includes at least two second annular voice coils 231 nested in sequence and arranged in sequence along the first direction, thereby effectively improving the strength of the reinforcement part 211 and avoiding high-frequency harmonics of the reinforcement part 211.

[0053] See also Figure 5 and Fig. 9 In one embodiment, the magnetic circuit system 1 includes a magnetic circuit unit 11 and a magnetic yoke 12. The magnetic circuit unit 11 is formed with a first magnetic gap 131 and a second magnetic gap 132. The side of the magnetic circuit unit 11 away from the diaphragm 21 is arranged on the magnetic yoke 12. The magnetic yoke 12 is provided with a avoidance hole 123 corresponding to the magnetic component 24. On the one hand, the magnetic component 24 is avoided by providing the avoidance hole 123 on the magnetic yoke 12, thereby providing sufficient downward vibration space for the first voice coil 22 and the second voice coil 23. On the other hand, the size of the static magnetic force on the magnetic component 24 can be changed by adjusting the size of the avoidance hole 123, so that the size of the static magnetic force on the magnetic component 24 can be adjusted.

[0054] In one embodiment, the magnetic assembly 24 includes a first magnetic component 241 and a second magnetic component 242, the first magnetic component 241 is connected to the first voice coil 22, the second magnetic component 242 is connected to the second voice coil 23, and the avoidance hole 123 includes a first avoidance hole 1231 and a second avoidance hole 1232, the first avoidance hole 1231 avoids the first magnetic component 241, and the second avoidance hole 1232 avoids the second magnetic component 242. By adjusting the size of the first avoidance hole 1231, the size of the static magnetic force on the first magnetic component 241 can be adjusted, and by adjusting the size of the second avoidance hole 1232, the size of the static magnetic force on the second magnetic component 242 can be adjusted, thereby achieving independent adjustment of the static magnetic forces of the first magnetic component 241 and the second magnetic component 242. It should be noted that the number of first magnetic parts 241 can be one or more, and there is no limitation on this. For the first magnetic part 241, the first magnetic part 241 and the first avoidance hole 1231 can be set in a one-to-one correspondence, or one first avoidance hole 1231 can correspond to at least one first magnetic part 241, that is, one first avoidance hole 1231 can avoid at least one first magnetic part 241; similarly, the number of second magnetic parts 242 can be one or more, and there is no limitation on this. For the second magnetic part 242, the second magnetic part 242 and the second avoidance hole 1232 can be set in a one-to-one correspondence, or one second avoidance hole 1232 can correspond to at least one second magnetic part 242, that is, one second avoidance hole 1232 can avoid at least one second magnetic part 242.

[0055] According to one embodiment of the present invention, the magnetic yoke includes a central magnetic yoke 121 and a side magnetic yoke 122, the central magnetic yoke 121 and the side magnetic yoke 122 are spaced apart, the first avoidance hole 1231 is arranged at the central magnetic yoke 121 and / or between the central magnetic yoke 121 and the side magnetic yoke 122, and the second avoidance hole 1232 is arranged at the central magnetic yoke 121 and / or between the central magnetic yoke 121 and the side magnetic yoke 122. That is, the first avoidance hole 1231 can be set between the central magnetic yoke 121 and the side magnetic yoke 122, and the first avoidance hole 1231 can also be set on the central magnetic yoke 121 to avoid the first magnetic parts 241 at different positions or different numbers; the second avoidance hole 1232 can be set between the central magnetic yoke 121 and the side magnetic yoke 122, and the second avoidance hole 1232 can also be set on the central magnetic yoke 121 to avoid the second magnetic parts 242 at different positions or different numbers.

[0056] In one embodiment, the magnetic yoke includes a central magnetic yoke 121 and a side magnetic yoke 122, the central magnetic yoke 121 and the side magnetic yoke 122 are spaced apart, and the first avoidance hole 1231 and the second avoidance hole 1232 are arranged between the central magnetic yoke 121 and the side magnetic yoke 122; the first avoidance hole 1231 and the second avoidance hole 1232 are arranged in the gap between the central magnetic yoke 121 and the side magnetic yoke 122, so that the gap can not only avoid the first magnetic component 241 but also avoid the second magnetic component 242.

[0057] In one embodiment, the magnetic yoke includes a central magnetic yoke 121 and a side magnetic yoke 122, the central magnetic yoke 121 and the side magnetic yoke 122 are spaced apart, the first avoidance hole 1231 and the second avoidance hole 1232 are arranged on the central magnetic yoke 121, and the first avoidance hole 1231 and the second avoidance hole 1232 are both arranged on the central magnetic yoke 121, so that the central magnetic yoke 121 can avoid the first magnetic component 241 and the second magnetic component 242.

[0058] In one embodiment, the magnetic yoke includes a central magnetic yoke 121 and a side magnetic yoke 122, the central magnetic yoke 121 and the side magnetic yoke 122 are spaced apart, and a first avoidance hole 1231 and a second avoidance hole 1232 are provided between the central magnetic yoke 121 and the side magnetic yoke 122 and on the central magnetic yoke 121, that is, the first avoidance hole 1231 can be provided between the central magnetic yoke 121 and the side magnetic yoke 122, and the first avoidance hole 1231 can also be provided on the central magnetic yoke 121 to avoid the first magnetic component 241 at different positions or different numbers; the second avoidance hole 1232 can be provided between the central magnetic yoke 121 and the side magnetic yoke 122, and the second avoidance hole 1232 can also be provided on the central magnetic yoke 121 to avoid the second magnetic component 242 at different positions or different numbers.

[0059] According to one embodiment of the present invention, the first magnetic part 241 is annular, and the first avoidance hole 1231 is annular. Compared with using a part of the annular magnetic part as the first magnetic part 241, the first magnetic part 241 is annular and is subjected to a greater static magnetic force, which can better improve the performance of the sound unit 100.

[0060] According to another embodiment of the present invention, the second magnetic component 242 is annular in shape, and the second avoidance hole 1232 is annular in shape. Compared with using a part of the annular magnetic component as the second magnetic component 242, the second magnetic component 242 is annular in shape and is subjected to a greater static magnetic force, which can better improve the performance of the sound unit 100.

[0061] It should be noted that the magnetic yoke includes a magnetic yoke body, a first magnetic yoke portion and a second magnetic yoke portion. The magnetic yoke body is provided with a first through hole and a second through hole. The first magnetic yoke portion is arranged in the first through hole and is spaced apart from the magnetic yoke body to form a first avoidance hole 1231; the second magnetic yoke portion is arranged in the second through hole and is spaced apart from the magnetic yoke body to form a second avoidance hole 1232.

[0062] According to one embodiment of the present invention, there are multiple first magnetic parts 241, and the multiple first magnetic parts 241 are arranged at intervals along the circumference of the first voice coil 22. The first avoidance holes 1231 are consistent with the number of the first magnetic parts 241 and are arranged one by one. Compared with one first magnetic part 241, setting multiple first magnetic parts 241 can increase the driving force acting on the diaphragm 21 through the first voice coil 22, which helps to improve the performance of the sound unit 100.

[0063] According to another embodiment of the present invention, there are multiple second magnetic members 242, which are arranged at intervals along the circumference of the second voice coil 23, and the number of second avoidance holes 1232 is consistent with that of the second magnetic members 242 and they are arranged one by one. Compared with one second magnetic member 242, providing multiple second magnetic members 242 can increase the driving force acting on the diaphragm 21 through the first voice coil 22, which helps to improve the performance of the sound unit 100.

[0064] See also Figure 1 , Figure 3 and Figure 8 In one embodiment, the sound unit 100 further includes a back cover 3, which is disposed on the side of the magnetic yoke away from the diaphragm 21, and the back cover 3 protrudes in a direction away from the diaphragm 21 to form an avoidance groove 31, and the avoidance groove 31 is disposed corresponding to the avoidance hole. The avoidance groove is provided to avoid the magnetic component, thereby ensuring that the first voice coil 22 and the second voice coil 23 have sufficient downward vibration space, and effectively improving the performance of the sound unit 100.

[0065] See also Figure 4 and Figure 8In one embodiment, a leakage hole 1221 is provided on the side magnetic yoke 122, and an isolation mesh hole 36 corresponding to and connected to the leakage hole 1221 is provided on the rear cover 3. By providing the isolation mesh hole 36 on the rear cover 3 and connecting to the leakage hole 1221, the air pressure is balanced.

[0066] According to an embodiment of the present invention, the vibration system 2 further includes a plurality of balanced diaphragms 21, and the plurality of balanced diaphragms 21 are all located on the side of the side conductive magnetic yoke 122 away from the diaphragm 21, and the plurality of balanced diaphragms 21 are divided into a first balanced diaphragm 21 group and a second balanced diaphragm 21 group, and the first balanced diaphragm 21 group is arranged corresponding to the first voice coil 22, and the first balanced diaphragm 21 group includes a plurality of first balanced diaphragms 21, and the plurality of first balanced diaphragms 21 are arranged at intervals along the circumference of the first voice coil 22, one end of a portion of the first balanced diaphragms 21 is connected to the side conductive magnetic yoke 122, and the other end is connected to the first magnetic member 241 or the first voice coil 22, and one end of another portion of the first diaphragms 21 is connected to the center conductive magnetic yoke 121, and the other end is connected to the third magnetic member 243 or the first voice coil 22 The second balanced diaphragm 21 group is arranged corresponding to the second voice coil 23, and the second balanced diaphragm 21 group includes a plurality of second balanced diaphragms 21, and the plurality of second balanced diaphragms 21 are arranged at intervals along the circumference of the second voice coil 23. One end of some second balanced diaphragms 21 is connected to the side magnetic yoke 122, and the other end is connected to the second magnetic member 242 or the second voice coil 23. One end of another part of the second diaphragm 21 is connected to the center magnetic yoke 121, and the other end is connected to the fourth magnetic member 244 or the second voice coil 23, thereby balancing the second voice coil 23. The side magnetic yoke 122 is provided with a connecting hole for avoiding the balanced diaphragm 21, and the number of the connecting holes is consistent with that of the balanced diaphragm 21 and they are arranged one by one.

[0067] In one embodiment, the vibration system 2 vibrates along a first direction, the first magnetic gap 131 and the second magnetic gap 132 are spaced apart along the second direction, the first direction and the second direction are perpendicular to each other, the magnetic circuit unit 11 includes a central magnetic circuit 111, an intermediate magnetic circuit 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, the intermediate magnetic circuit 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 magnetizing direction of the magnet of the central magnetic circuit 111 is the same as the magnetizing direction of the magnet of the side magnetic circuit 113, the magnetizing direction of the magnet of the first intermediate magnetic circuit 1121 and the magnetizing direction of the magnet of the second intermediate magnetic circuit 1122 are opposite to the magnetizing direction of the magnet of the central magnetic circuit 111, the first magnetic gap 131 surrounds the first intermediate magnetic circuit 1121, and the second magnetic gap 132 surrounds the second intermediate magnetic circuit 1122; it is ensured that the first voice coil 22 and the second voice coil 23 can vibrate along the same direction when the current direction is consistent.

[0068] In 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, and the side magnetic circuit 113 includes a side magnet 1131 and a side magnetic conductive plate 1132. The central magnet 1111, the first intermediate magnet 11211, and the second intermediate magnet 1122 1 and the side magnets 1131 are magnetized along a first direction, the center magnet 1111 and the side magnets 1131 are magnetized in the same direction, the first intermediate magnet 11211 and the second intermediate magnet 11221 are magnetized in opposite directions to the center magnet 1111, the center magnetic conductive plate 1112, the first intermediate magnetic conductive plate 11212 and the side magnetic conductive plate 1132 form a first magnetic gap 131, and the center magnetic conductive plate 1112, the second intermediate magnetic conductive plate 11222 and the side magnetic conductive plate 1132 form a second magnetic gap 132. Among them, the central magnetic conductive plate 1112, the first intermediate magnetic conductive plate 11212 and the second intermediate magnetic conductive plate 11222 are located on the inner side of the side magnetic conductive plate 1132 and are spaced apart from the side magnetic conductive plate 1132. The central magnetic conductive plate 1112, the first intermediate magnetic conductive plate 11212 and the side magnetic conductive plate 1132 are used for magnetic conduction to ensure that the first magnetic gap 131 has sufficient magnetic flux. The central magnetic conductive plate 1112, the second intermediate magnetic conductive plate 11222 and the side magnetic conductive plate 1132 are used for magnetic conduction to ensure that the second magnetic gap 132 has sufficient magnetic flux.

[0069] It should be noted that the number of the side magnetic conductive plates 1132 can be one or more, and there is no limitation here. Similarly, the number of the first intermediate magnetic conductive plates 11212, the second intermediate magnetic conductive plates 11222, and the central magnetic conductive plates 1112 can also be one or more. It should also be noted that the side magnetic conductive plates 1132 are injection molded on the housing 4.

[0070] See also Figure 3 and Figure 4 In one embodiment, the sound unit 100 further includes a housing 4 and an elastic support member 5, the vibration system 2 and the magnetic circuit system 1 are respectively connected to the two ends of the housing 4, the outer periphery of the diaphragm 21 is connected to the housing 4, one end of the elastic support member 5 is connected to the housing 4, and the first voice coil 22 and the second voice coil 23 are both connected to the other end of the elastic support member 5. The elastic support member 5 plays a centering and supporting role for the first voice coil 22 and the second voice coil 23, prevents the first voice coil 22 and the second voice coil 23 from polarization, and improves the vibration stability of the first voice coil 22 and the second voice coil 23.

[0071] See also Figure 4 , Figure 8 and Fig.10In one embodiment, a pad component 53 is provided on the first centering support 51 and the second centering support 52. The pad component 53 includes a first pad 531, a second pad 532, a third pad 533 and a fourth pad 534. The first pad 531 and the third pad 533 are provided on the first fixing portion 511, the second pad 532 and the fourth pad 534 are provided on the second fixing portion 521, the first pad 531 and the second pad 532 are both electrically connected to the first voice coil 22, and the third pad 533 and the fourth pad 534 are both electrically connected to 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 531 and the third pad 533 on the first centering support 51, and the second pad 532 and the fourth pad 534 on the second centering support 52, which helps to reduce the thickness of the sound unit 100.

[0072] According to another embodiment of the present invention, a support plate magnetic member is provided on the elastic support member 5, wherein the support plate magnetic member can be made of a permanent magnetic material, such as ferrite, precious metal alloy, etc.; the support plate magnetic member can also be made of a magnetic conductive material; the support plate magnetic member can also be made of a soft magnetic material, such as pure iron, nickel, etc.; wherein the support plate magnetic member will be affected by a static magnetic force, and when the first voice coil 22 and the second voice coil 23 vibrate upward from the equilibrium position, the resultant force direction of the static magnetic force on the support plate magnetic member is also upward, and the force will act on the first voice coil 22 and the second voice coil 23 through the elastic support member 5. Since the direction of the static magnetic force on the support plate magnetic member is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, The vibration directions of the first voice coil 22 and the second voice coil 23 are consistent, thereby effectively increasing the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21, thereby effectively improving the sensitivity of the sound-emitting unit 100; similarly, when the first voice coil 22 and the second voice coil 23 vibrate downward from the equilibrium position, the resultant direction of the static magnetic force on the support magnetic part is also downward, and this force will act on the first voice coil 22 and the second voice coil 23 through the elastic support member 5. Since the resultant direction of the static magnetic force on the support magnetic part is consistent with the vibration direction of the first voice coil 22 and the second voice coil 23, the driving force of the first voice coil 22 and the second voice coil 23 on the diaphragm 21 is effectively increased, thereby effectively improving the sensitivity of the sound-emitting unit 100.

[0073] In one embodiment, the elastic support member 5 includes a first centering support piece 51 and a second centering support piece 52. The first centering support piece 51 and the second centering support piece 52 are arranged at intervals in a direction perpendicular to the second direction. The first centering support piece 51 includes a first fixing portion 511, two first elastic arms 512 and two first mounting portions 513. The two first elastic arms 512 are respectively arranged at both ends of the first fixing portion 511. The first mounting portions 513 and the first elastic arms 512 are arranged one by one. 3 are connected to the housing 4, the first fixing portion 511 is connected to the first voice coil 22 and the second voice coil 23; the second centering support 52 includes a second fixing portion 521, two second elastic arms 522 and two second mounting portions 523, the two second elastic arms 522 are respectively arranged at the two ends of the second fixing portion 521, the second mounting portions 523 are arranged one by one with the second elastic arms 522, each second mounting portion 523 is connected to the housing 4, and the second fixing portion 521 is connected to the first voice coil 22 and the second voice coil 23. The first centering support 51 and the second centering support 52 can jointly play a centering and supporting role for the first voice coil 22 and the second voice coil 23, prevent the first voice coil 22 and the second voice coil 23 from polarization, and improve the vibration stability of the first voice coil 22 and the second voice coil 23. Furthermore, compared with a centering support plate with an integral structure, the use of independent first centering support plate 51 and second centering support plate 52 eliminates the need for a connecting structure for connecting the first centering support plate 51 and the second centering support plate 52 , thus reducing the cost.

[0074] According to one embodiment of the present invention, the side magnetic circuit 113 includes a plurality of side magnet blocks, and the plurality of side magnet blocks are arranged at intervals along the circumference of the middle magnet, and an escape space is formed between any two adjacent side magnet blocks, wherein any first elastic arm portion 512 is correspondingly provided with an escape space setting, and any second elastic arm portion 522 is correspondingly provided with an escape space setting, so as to prevent the first centering support plate 51 and the second centering support plate 52 from interfering with the side magnets.

[0075] The present invention also proposes a sound module, which includes a housing and a sound unit 100, wherein the sound unit 100 is disposed in the housing, and the sound module can be a speaker module. The sound module can be applied to electronic devices such as computers, mobile phones, and smart wearable devices. Since the sound module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0076] 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, the vibration system comprising a diaphragm, a first voice coil, a second voice coil and a magnetic assembly, the first voice coil being located in the first magnetic gap, the second voice coil being located in the second magnetic gap, one side of the first voice coil being connected to the diaphragm, the other side of the first voice coil being connected to the magnetic assembly, one side of the second voice coil being connected to the diaphragm, the other side of the second voice coil being connected to the magnetic assembly, the current directions of the first voice coil and the second voice coil being the same, and the magnetic assembly being capable of providing the first voice coil and the second voice coil with a force opposite to the direction of the diaphragm restoring force.

2. The sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system includes a magnetic circuit unit and a magnetic yoke, the magnetic circuit unit forms the first magnetic gap and the second magnetic gap, the side of the magnetic circuit unit away from the diaphragm is arranged on the magnetic yoke, and the magnetic yoke is provided with an avoidance hole corresponding to the magnetic component.

3. The sound-emitting unit according to claim 1, characterized in that: The magnetic assembly includes a first magnetic component and a second magnetic component, the first magnetic component is connected to the first voice coil, the second magnetic component is connected to the second voice coil, the avoidance hole includes a first avoidance hole and a second avoidance hole, the first avoidance hole avoids the first magnetic component, and the second avoidance hole avoids the second magnetic component.

4. The sound-emitting unit according to claim 3, characterized in that: The magnetic yoke includes a central magnetic yoke and a side magnetic yoke, the central magnetic yoke is spaced from the side magnetic yoke, the first avoidance hole is arranged at the central magnetic yoke and / or between the central magnetic yoke and the side magnetic yoke, and the second avoidance hole is arranged at the central magnetic yoke and / or between the central magnetic yoke and the side magnetic yoke.

5. The sound-emitting unit according to claim 3, characterized in that: The first magnetic member is annular, and the first avoidance hole is annular; And / or, the second magnetic member is annular, and the second avoidance hole is annular.

6. The sound-emitting unit according to claim 3, characterized in that: The number of the first magnetic members is multiple, and the multiple first magnetic members are arranged at intervals along the circumference of the first voice coil, and the number of the first avoidance holes is consistent with that of the first magnetic members and are arranged in a one-to-one correspondence; And / or, there are multiple second magnetic components, the multiple second magnetic components are arranged at intervals along the circumference of the second voice coil, and the number of the second avoidance holes is consistent with that of the second magnetic components and is arranged in a one-to-one correspondence.

7. The sound-emitting unit according to any one of claims 2 to 6, characterized in that: The sound-emitting unit further includes a rear cover, which is arranged on a side of the magnetic yoke away from the diaphragm, and the rear cover protrudes in a direction away from the diaphragm to form an avoidance groove, and the avoidance groove is arranged corresponding to the avoidance hole; And / or, a leakage hole is arranged on the magnetic yoke, and an isolation mesh hole corresponding to and connected to the leakage hole is arranged on the back cover.

8. The sound-emitting unit according to any one of claims 2 to 6, characterized in that: The vibration system vibrates along a first direction, the first magnetic gap and the second magnetic gap are spaced apart along a second direction, the first direction and the second direction are perpendicular to each other, the magnetic circuit 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 magnetizing direction of the magnet of the central magnetic circuit is the same as the magnetizing direction of the magnet of the side magnetic circuit, the magnetizing direction of the magnet of the first intermediate magnetic circuit and the magnetizing direction of the magnet of the second intermediate magnetic circuit are both opposite to the magnetizing direction of the magnet of the central magnetic circuit, the first magnetic gap surrounds the first intermediate magnetic circuit, and the second magnetic gap surrounds the second intermediate magnetic circuit.

9. The sound-emitting unit according to claim 8, 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 magnet, the first intermediate magnet, the second intermediate magnet and the side magnet are all magnetized along the first direction, the central magnet and the side magnet have the same magnetization direction, the first intermediate magnet and the second intermediate magnet are both opposite to the magnetization direction of the central magnet, the central magnetic conductive plate, the first intermediate magnetic conductive plate and the side magnetic conductive plate form the first magnetic gap, and the central magnetic conductive plate, the second intermediate magnetic conductive plate and the side magnetic conductive plate form the second magnetic gap.

10. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The sound unit also includes a shell and an elastic support member. The vibration system and the magnetic circuit system are respectively connected to the two ends of the shell. The outer periphery of the diaphragm is connected to the shell. One end of the elastic support member is connected to the shell. The first voice coil and the second voice coil are both connected to the other end of the elastic support member.

11. The sound-emitting unit according to claim 10, characterized in that: The elastic support member includes a first centering support piece and a second centering support piece, the first centering support piece and the second centering support piece are arranged at intervals along a direction perpendicular to the second direction, the first centering support piece includes a first fixing portion, two first elastic arm portions and two first mounting portions, the two first elastic arm portions are respectively arranged at two ends of the first fixing portion, the first mounting portion and the first elastic arm portions are arranged one by one, each of the first mounting portions is connected to the housing, and the first fixing portion is connected to the first voice coil and the second voice coil; 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 and the second elastic arm portions are arranged in a one-to-one correspondence, each of the second mounting portions is connected to the shell, and the second fixing portion is connected to the first voice coil and the second voice coil.

12. The sound-emitting unit according to claim 11, characterized in that: A pad component is provided on the first centering support plate and the second centering support plate, and the pad component includes a first pad, a second pad, a third pad and a fourth pad, the first pad and the third pad are arranged on the first fixing portion, the second pad and the fourth pad are arranged on the second fixing portion, the first pad and the second pad are both electrically connected to the first voice coil, and the third pad and the fourth pad are both electrically connected to the second voice coil.

13. 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 12, wherein the sound unit is arranged in the housing.

Images