Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a shell, a magnetic circuit system and a vibration system, a common magnetic part of a bass magnetic circuit part in the magnetic circuit system is respectively separated from a central magnetic part and a side magnetic part to form a first bass magnetic gap and a second bass magnetic gap, the high-pitch magnetic circuit part is located on the outer side of the edge magnetic part, a first low-pitch voice coil of a low-pitch vibration unit in the vibration system corresponds to the first low-pitch magnetic gap, a second low-pitch voice coil of the low-pitch vibration unit corresponds to the second low-pitch magnetic gap, and the high-pitch vibration unit is connected to the shell and is opposite to the high-pitch magnetic circuit part in a spaced mode. According to the sound production device, the utilization rate of the magnetic circuit system is effectively improved, and the BL value is improved, so that the loudness and the sensitivity of the sound production device are improved, and full frequency and miniaturization are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducer, and in particular to a sound-generating device and electronic equipment using the sound-generating device. Background Art

[0002] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become part of people's daily lives. With the rapid development of technology, people's demand for the sound quality of electronic devices has become higher and higher, and full-range and miniaturized speakers have become mainstream demands.

[0003] In the related art, the common full-frequency solution is to assemble the woofer and tweeter in one electronic device at the same time. However, due to the space of the electronic device, the size of the two units is greatly limited, which affects the full-frequency effect of the speaker, resulting in low performance and failure to achieve better sound quality. At the same time, a single voice coil solution is usually used in woofers. The voice coil has a low utilization rate of the magnetic field generated by the magnetic circuit system, and the vibration effect of the voice coil driving the diaphragm is not ideal, thereby reducing the BL value of the woofer. In addition, the utilization rate of the magnetic energy in the middle area of ​​the center magnetic in the magnetic circuit system is low and cannot be effectively utilized, thereby affecting the loudness and sensitivity of the woofer. Summary of the invention

[0004] The main purpose of the present invention is to provide a sound-emitting device and an electronic device, aiming to provide a sound-emitting device with a high magnetic field utilization rate. The sound-emitting device integrates the bass and tweeter units into one, thereby occupying a smaller space and having a higher adaptability to the overall space. The magnetic circuit system is optimized and the utilization rate of the magnetic circuit system is further improved by using inner and outer double voice coils, and the BL value is improved, thereby improving the loudness and sensitivity of the sound-emitting device.

[0005] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0006] shell;

[0007] a magnetic circuit system connected to the housing, the magnetic circuit system comprising a bass magnetic circuit portion and a treble magnetic circuit portion, the bass magnetic circuit portion comprising a magnetic yoke and a central magnetic portion, a common magnetic portion and a side magnetic portion arranged on the magnetic yoke, the common magnetic portion being located outside the central magnetic portion and spaced from the central magnetic portion to form a first bass magnetic gap, the side magnetic portion being located outside the common magnetic portion and spaced from the common magnetic portion to form a second bass magnetic gap; and

[0008] A vibration system, the vibration system comprising a bass vibration unit and a treble vibration unit, the bass vibration unit comprising a bass diaphragm and a first bass voice coil and a second bass voice coil connected to the bass diaphragm, an inner ring hole is provided at the center of the bass diaphragm, the outer periphery of the bass diaphragm is connected to the housing, the inner periphery of the bass diaphragm is connected to the bass magnetic circuit part, the first bass voice coil is arranged corresponding to the first bass magnetic gap, the second bass voice coil is arranged corresponding to the second bass magnetic gap, the treble vibration unit is connected to the housing, and is arranged opposite to and spaced from the treble magnetic circuit part;

[0009] Among them, the central magnetic part includes a first central magnet, a central magnetic conductive plate and a second central magnet which are stacked, and the common magnetic part includes a first common magnet, a common magnetic conductive plate and a second common magnet which are stacked. The first central magnet, the central magnetic conductive plate and the second central magnet respectively correspond to the first common magnet, the common magnetic conductive plate and the second common magnet in a vibration direction perpendicular to the vibration system, and the thickness of the second central magnet along the vibration direction of the vibration system is greater than the thickness of the second common magnet along the vibration direction of the vibration system, and the top surface height of the bass diaphragm is lower than the top surface height of the bass magnetic circuit part.

[0010] In one embodiment, the tweeter magnetic circuit portion is located on the side of the side magnetic circuit, the bass vibration unit has a bass radiation surface, the tweeter vibration unit has a tweeter radiation surface, and the bass radiation surface is set at an angle to the tweeter radiation surface.

[0011] In one embodiment, the housing includes a frame body and an installation side wall, the installation side wall is arranged on one side of the frame body and encloses an installation space with an outer wall of the frame body, and the installation side wall is provided with an installation hole connected to the installation space;

[0012] The periphery of the bass diaphragm is connected to one end of the frame body, the side magnet portion is connected to the other end of the frame body, the tweeter magnetic circuit portion is arranged in the installation space and corresponds to the installation hole, and the tweeter vibration unit is connected to the installation side wall and covers the installation hole.

[0013] In one embodiment, the tweeter magnetic circuit portion includes a first magnet, a second magnet, and a third magnet disposed in the installation space, the first magnet, the second magnet, and the third magnet are stacked in a direction parallel to the tweeter radiation surface, the first magnet is adjacent to the magnetic yoke, and the third magnet is connected to the frame body;

[0014] The tweeter vibration unit includes a tweeter diaphragm and a tweeter voice coil connected to the tweeter diaphragm, the tweeter diaphragm is connected to the mounting side wall and covers the mounting hole, the tweeter voice coil is located in the mounting hole and is opposite to and spaced apart from the tweeter magnetic circuit part.

[0015] In one embodiment, the first magnet, the second magnet and the third magnet are all magnetized in a direction perpendicular to the tweeter radiation surface, and the magnetization direction of the second magnet is opposite to the magnetization direction of the first magnet and the third magnet;

[0016] Or, the second magnet is magnetized in a direction perpendicular to the tweeter radiation surface, the first magnet and the third magnet are magnetized in a direction parallel to the tweeter radiation surface, and the magnetization direction of the first magnet is opposite to the magnetization direction of the third magnet, and the magnetic pole of the first magnet close to the second magnet is the same as the magnetic pole of the second magnet close to the tweeter radiation surface;

[0017] And / or, the tweeter diaphragm is a planar diaphragm, and the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy;

[0018] And / or, the tweeter voice coil is fixed to a side of the tweeter diaphragm facing the tweeter magnetic circuit portion, the tweeter voice coil is a flat voice coil formed by winding an enameled wire, and the central axis of the flat voice coil is perpendicular to the tweeter radiation surface; or, the tweeter voice coil includes a coil structure formed by a circuit board and a conductive circuit arranged on the circuit board;

[0019] And / or, the tweeter diaphragm is a planar diaphragm, and a reinforcement portion is provided in a central area of ​​the tweeter diaphragm.

[0020] In one embodiment, the first central magnet and the second central magnet are both magnetized along the vibration direction of the bass diaphragm, and the magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are the same;

[0021] The first common magnet and the second common magnet are both magnetized along the vibration direction of the bass diaphragm, and the magnetic poles of the first common magnet and the second common magnet close to the common magnetic conductive plate are the same, and the side magnets are magnetized along the vibration direction of the bass diaphragm;

[0022] The magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are opposite to the magnetic poles of the first common magnet and the second common magnet close to the common magnetic conductive plate;

[0023] The edge magnetic part includes stacked edge magnets and edge magnetic conductive plates, the edge magnetic conductive plates are connected to the outer shell, the magnetic poles of the edge magnets close to the edge magnetic conductive plates are the same as the magnetic poles of the first center magnets close to the center magnetic conductive plates, and the magnetic poles of the edge magnets close to the edge magnetic conductive plates are opposite to the magnetic poles of the first common magnets close to the common magnetic conductive plates.

[0024] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge magnetic conductive plate, the edge magnetic conductive plate is connected to the housing, the magnetic conductive yoke includes a first magnetic yoke and a second magnetic yoke, the first center magnet, the first common magnet and the edge magnet are connected to the first magnetic yoke, and the second center magnet and the second common magnet are connected to the second magnetic yoke;

[0025] The second magnetic yoke includes a protruding portion and a border portion connected to the edge of the protruding portion, the protruding portion passes through the inner ring hole and forms a recessed groove facing the central magnetic portion, the second central magnet has a protruding portion protruding from the second common magnet, the protruding portion is accommodated and confined in the recessed groove, and the inner periphery of the bass diaphragm is connected to the border portion.

[0026] In one embodiment, the bass diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the inner ring portion forms the inner ring hole, and the inner ring portion is connected to the edge portion.

[0027] In one embodiment, the inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure;

[0028] And / or, the top surface height of the side magnetic portion is lower than the top surface height of the common magnetic portion, the protrusion direction of the first fold ring is toward the direction away from the bass magnetic circuit portion, the protrusion direction of the second fold ring is opposite to the protrusion direction of the first fold ring, the first fold ring is at least partially opposite to the second magnetic gap, and the second fold ring is at least partially opposite to the side magnetic circuit portion;

[0029] And / or, a avoidance structure is provided at the periphery of the second common magnet adjacent to the second bass magnetic gap.

[0030] In one embodiment, the common magnetic part is provided with an avoidance gap connecting the first bass magnetic gap and the second bass magnetic gap;

[0031] The bass vibration unit also includes a frame, which includes a main body and a connecting part connected to the main body, the main body is connected to the bass diaphragm, the connecting part is located in the avoidance gap, and two ends of the connecting part are respectively connected to the first bass voice coil and the second bass voice coil.

[0032] In one embodiment, an escape space is formed between the edge magnetic portion and the housing;

[0033] The bass vibration unit further includes a centering support plate, one end of which is connected to the housing, and the other end of which is located in the avoidance space;

[0034] The frame further includes an extension portion, one end of which is connected to the periphery of the main body portion, and the other end of which extends toward the centering support piece and is connected to the centering support piece.

[0035] In one embodiment, the main body is arranged in a rectangular ring, the connecting part includes a plurality of connecting parts, the plurality of connecting parts are arranged corresponding to the four corners of the main body respectively, and the common magnetic part is provided with an avoidance notch corresponding to each connecting part;

[0036] And / or, two ends of the connecting portion are respectively provided with a first connecting surface and a second connecting surface, the first connecting surface is connected to the first bass voice coil, and the second connecting surface is connected to the second bass voice coil;

[0037] And / or, the shell has two long sides and two short sides connected end to end, the centering support plates include two, the two centering support plates are symmetrically arranged and respectively correspond to the two short sides, and the tweeter magnetic circuit part and the tweeter vibration unit are arranged corresponding to the long sides.

[0038] In one embodiment, a dimension of the sound-generating device along a vibration direction of the bass vibration unit is smaller than a dimension of the sound-generating device along a vibration direction of the treble vibration unit.

[0039] In one embodiment, the sound-emitting device is installed in a shell of a sound-emitting module, and forms a bass front cavity, a treble front cavity and a rear cavity which are isolated from each other with the shell. The shell is provided with a bass sound outlet hole connected to the bass front cavity and a treble sound outlet hole connected to the treble front cavity. The sound waves of the bass diaphragm are radiated to the outside through the bass sound outlet hole, and the sound waves of the treble radiation surface are radiated to the outside through the treble sound outlet hole; wherein the volume of the rear cavity is ≤1.5cc.

[0040] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0041] The sound-generating device of the technical solution of the present invention connects the magnetic circuit system to the shell, and sets the magnetic circuit system as a bass magnetic circuit part and a treble magnetic circuit part, and sets the vibration system as a bass vibration unit and a treble vibration unit, so that the periphery of the bass diaphragm is connected to the shell, and the treble vibration unit is connected to the shell and is arranged opposite to and spaced from the treble magnetic circuit part, thereby realizing the integration of the bass and treble units into one; at the same time, by setting the bass magnetic circuit part of the magnetic circuit system as a magnetic yoke and a central magnetic part, a common magnetic part and a side magnetic part arranged on the magnetic yoke, the common magnetic part is located on the outside of the central magnetic part and is spaced from the central magnetic part to form A first bass magnetic gap is formed, and the side magnetic portion is located on the outside of the common magnetic portion and is spaced from the common magnetic portion to form a second bass magnetic gap, so that the first bass voice coil of the bass vibration unit in the vibration system is arranged corresponding to the first bass magnetic gap, and the second bass voice coil is arranged corresponding to the second bass magnetic gap, forming an inner and outer double voice coil structure. In this way, current is passed through the first bass voice coil and the second bass voice coil, so that the two voice coils vibrate in the magnetic fields of the first bass magnetic gap and the second bass magnetic gap formed by the bass magnetic circuit part of the magnetic circuit system respectively, and drive the bass diaphragm to vibrate and make sound, so as to improve the BL value, thereby improving the loudness and sensitivity of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0044] Figure 2 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0045] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0046] Figure 4 A partial structural schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0047] Figure 5 An exploded schematic diagram of an embodiment of a bass magnetic circuit provided by the present invention;

[0048] Figure 6 A schematic structural diagram of an embodiment of a bass diaphragm provided by the present invention;

[0049] Figure 7A schematic structural diagram of an embodiment of a skeleton provided by the present invention;

[0050] Figure 8 A structural schematic diagram of an embodiment of a sound module provided by the present invention;

[0051] Fig. 9 An exploded schematic diagram of an embodiment of a sound module provided by the present invention;

[0052] Fig.10 A cross-sectional schematic diagram of an embodiment of a sound module provided by the present invention;

[0053] Fig.11 A cross-sectional schematic diagram from another perspective of an embodiment of the sound module provided by the present invention.

[0054] Description of Figure Numbers:

[0055] 100, sound-generating device; 1, housing; 11, frame body; 111, long side; 112, short side; 113, avoidance space; 12, installation side wall; 121, installation space; 122, installation hole; 2, magnetic circuit system; 21, bass magnetic circuit part; 211, magnetic yoke; 2111, first magnetic yoke; 2112, second magnetic yoke; 2113, raised part; 2114, edge part; 2115, recessed groove; 212, central magnetic part; 2121, first central magnet ; 2122, center magnetic plate; 2123, second center magnet; 2124, protrusion; 213, common magnetic part; 2131, first common magnet; 2132, common magnetic plate; 2133, second common magnet; 2134, avoidance structure; 2135, avoidance gap; 214, side magnetic part; 2141, side magnet; 2142, side magnetic plate; 215, first bass magnetic gap; 216, second bass magnetic gap; 22, treble magnetic circuit part; 221, first A magnet; 222, a second magnet; 223, a third magnet; 3, a vibration system; 31, a bass vibration unit; 311, a bass diaphragm; 3111, an inner ring; 3112, an inner ring hole; 3113, a first folding ring; 3114, a straight portion; 3115, a second folding ring; 3116, a fixing portion; 3117, a bass radiation surface; 312, a first bass voice coil; 313, a second bass voice coil; 314, a skeleton; 3141, a main body; 3142, a connecting portion; 3143, extension part; 3144, first connecting surface; 3145, second connecting surface; 315, centering support plate; 32, tweeter vibration unit; 321, tweeter diaphragm; 322, tweeter voice coil; 323, tweeter radiation surface; 400, shell; 411, bass sound outlet hole; 412, treble sound outlet hole; 413, tweeter sound guide; 414, upper shell; 415, lower shell; 421, bass front cavity; 422, treble front cavity; 430, rear cavity; 500, sound module.

[0056] 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

[0057] 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.

[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0060] In addition, in the present invention, descriptions such as "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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0061] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have penetrated into people's daily lives. With the rapid development of science and technology, people's demands for the sound quality of electronic devices are getting higher and higher, and full-frequency and miniaturization of speakers have become mainstream demands. With the multifunctional and miniaturized design of portable terminal electronic products, higher requirements are placed on the vibration and acoustic performance of miniature sound-generating devices. Usually, a sound-generating device generally includes a magnetic circuit system and a vibration system, wherein the vibration system includes a diaphragm and a voice coil combined on one side of the diaphragm. The energized voice coil can drive the diaphragm to vibrate under the action of the magnetic circuit system, thereby realizing the sound of the sound-generating device.

[0062] In the related art, a common full-frequency solution is to assemble a woofer and a tweeter in one electronic device at the same time. However, due to the space of the electronic device, the size of the two units is greatly restricted, which affects the full-frequency effect of the speaker, resulting in low performance and failure to achieve better sound quality. At the same time, a single voice coil solution is usually used in small rear cavity sound-emitting devices (usually the rear cavity is less than 1.5cc). The voice coil has a low utilization rate of the magnetic field generated by the magnetic circuit system, and the vibration effect of the voice coil driving the diaphragm is not ideal, thereby reducing the BL value of the woofer. In addition, the utilization rate of the magnetic energy in the middle area of ​​the center magnet in the magnetic circuit system is low and cannot be effectively utilized, thus affecting the loudness and sensitivity of the woofer. The loudness of miniature sound-emitting devices generally cannot meet the demand, so it is an important task to further improve the utilization rate of the magnet and enhance the sensitivity of the sound-emitting device.

[0063] Based on the above ideas and problems, the present invention proposes a sound-generating device 100. It can be understood that the sound-generating device 100 is applied to electronic devices, and the electronic devices can be mobile phones, computers, headphones, watches, etc., which are not limited here.

[0064] Please refer to Figures 1 to 7 As shown, in the embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3. The magnetic circuit system 2 is connected to the housing 1. The magnetic circuit system 2 includes a bass magnetic circuit part 21 and a treble magnetic circuit part 22. The bass magnetic circuit part 21 includes a magnetic yoke 211 and a central magnetic part 212, a common magnetic part 213 and a side magnetic part 214 arranged on the magnetic yoke 211. The common magnetic part 213 is located on the outer side of the central magnetic part 212 and is spaced from the central magnetic part 212 to form a first bass magnetic gap 215. The side magnetic part 214 is located on the outer side of the common magnetic part 213 and is spaced from the common magnetic part 213 to form a second bass magnetic gap 216. The vibration system 3 includes a bass magnetic circuit part 21 and a treble magnetic circuit part 22. The dynamic system 3 includes a bass vibration unit 31 and a treble vibration unit 32. The bass vibration unit 31 includes a bass diaphragm 311 and a first bass voice coil 312 and a second bass voice coil 313 connected to the bass diaphragm 311. An inner ring hole 3112 is provided in the center of the bass diaphragm 311. The outer periphery of the bass diaphragm 311 is connected to the outer shell 1, and the inner periphery of the bass diaphragm 311 is connected to the magnetic circuit system 2. The first bass voice coil 312 is arranged corresponding to the first bass magnetic gap 215, and the second bass voice coil 313 is arranged corresponding to the second bass magnetic gap 216. The treble vibration unit 32 is connected to the outer shell 1, and is arranged opposite to and spaced from the treble magnetic circuit part 22.

[0065] In this embodiment, the housing 1 is used to install, fix, support and protect components such as the vibration system 3 and the magnetic circuit system 2, that is, the housing 1 provides an installation base for components such as the vibration system 3 and the magnetic circuit system 2. It can be understood that the housing 1 can be a structure such as a mounting shell, a shell or a box body with a mounting cavity, that is, the housing 1 defines a receiving space, which is not limited here. Optionally, the housing 1 is a rectangular structure, and the housing 1 has two opposite long sides 111 and two short sides 112, and the two ends of the short side 112 are respectively connected to the two long sides 111, and the two ends of the long side 111 are respectively connected to the two short sides 112, so that the housing 1 defines a receiving space.

[0066] It is understandable that when the housing 1 is a metal part, the magnetic circuit system 2 is fixed to the housing 1 by bonding or welding. In another embodiment, when the housing 1 is plastic injection molded, the side magnetic conductive plate 2142 of the magnetic circuit system 2 is first injection molded into the housing 1 as an insert, or the magnetic circuit system 2 is fixed to the housing 1 by bonding, and then other parts are bonded and fixed, which is not limited here.

[0067] In this embodiment, the magnetic circuit system 2 is disposed in the receiving space and connected to the housing 1 . It can be understood that by setting the bass magnetic circuit part 21 of the magnetic circuit system 2 as a magnetic yoke 211 and a central magnetic part 212, a common magnetic part 213 and a side magnetic part 214 arranged on the magnetic yoke, the common magnetic part 213 is located on the outside of the central magnetic part 212 and is spaced from the central magnetic part 212 to form a first bass magnetic gap 215, and the side magnetic part 214 is located on the outside of the common magnetic part 213 and is spaced from the common magnetic part 213 to form a second bass magnetic gap 216, that is, the second bass magnetic gap 216 is arranged around the first bass magnetic gap 215, and the bass vibration unit 31 of the vibration system 3 is set as a bass diaphragm 311 and a first bass voice coil 312 and a second bass voice coil 313 connected to the bass diaphragm 311, so that the first bass voice coil 312 of the bass vibration unit 31 is arranged corresponding to the first bass magnetic gap 215, and the second bass voice coil 313 is arranged corresponding to the second bass magnetic gap 216, forming an inner and outer double voice coil structure. At the same time, the treble magnetic circuit part 22 of the magnetic circuit system 2 is located on the outside of the side magnetic part 214, and the treble vibration unit 32 of the vibration system 3 is connected to the outer shell 1, and is arranged opposite to and spaced from the treble magnetic circuit part 22, so that the bass and tweeter units are integrated into one, which occupies a smaller space and has a higher spatial adaptability of the whole machine, thereby realizing the full-frequency and miniaturization of the sound-emitting device 100, and by optimizing the bass magnetic circuit part 21 of the magnetic circuit system 2, the bass vibration unit 31 adopts inner and outer double voice coils to further improve the utilization rate of the magnetic circuit system 2, and improve the BL value, thereby improving the loudness and sensitivity of the sound-emitting device 100.

[0068] In this embodiment, the first bass voice coil 312 and the second bass voice coil 313 are annular racetrack voice coils, one end of the first bass voice coil 312 and the second bass voice coil 313 are connected to the bass diaphragm 311, and the other ends of the first bass voice coil 312 and the second bass voice coil 313 are suspended in the first bass magnetic gap 215 and the second bass magnetic gap 216 respectively, which is not limited here.

[0069] It should be noted that, by supplying current to the first bass voice coil 312 and the second bass voice coil 313, the first bass voice coil 312 and the second bass voice coil 313 transfer electrical energy to the first bass magnetic gap 215 and the second bass magnetic gap 216 of the bass magnetic circuit part 21, so that the magnetic field generated by the magnetic circuit system 2 converts the electrical energy into mechanical energy, thereby causing the first bass voice coil 312 and the second bass voice coil 313 to vibrate, and at the same time drive the bass diaphragm 311 to vibrate and produce sound, further converting the mechanical energy into sound energy.

[0070] It can be understood that after receiving the external alternating current signal, the first bass voice coil 312 disposed in the first bass magnetic gap 215 performs a reciprocating motion of cutting the magnetic field lines driven by the magnetic field force of the bass magnetic circuit part 21 of the magnetic circuit system 2, thereby driving the bass diaphragm 311 of the bass vibration unit 31 of the vibration system 3 to vibrate and produce sound. At the same time, after receiving the transmitted alternating current signal, the second bass voice coil 313 fully utilizes the bass magnetic circuit part 21 in the magnetic circuit system 2 to perform a reciprocating motion of cutting the magnetic field lines driven by the magnetic field force at the second bass magnetic gap 216, thereby fully utilizing the magnetic field of the magnetic circuit system 2, so that the first bass voice coil 312 and the second bass voice coil 313 cooperate to improve the driving force on the bass diaphragm 311, thereby effectively improving the BL value of the sound-generating device 100 and improving the vibration effect of the bass diaphragm 311.

[0071] In this embodiment, the first bass voice coil 312 and the second bass voice coil 313 can be connected in series or in parallel through a conductive structure, which is not limited here. In order to achieve electrical connection between the first bass voice coil 312 and the second bass voice coil 313 and the external circuit. In one embodiment, the vibration system 3 also includes a centering support plate or a connector or a skeleton 314, one end of the centering support plate or the connector or the skeleton 314 is connected to the first bass voice coil 312 and the second bass voice coil 313, and is connected and conducted with the leads of the first bass voice coil 312 and the second bass voice coil 313, and the other end of the centering support plate or the connector or the skeleton 314 is connected to the housing 1.

[0072] It can be understood that, taking the centering support as an example, the two ends of the centering support are electrically connected to the leads and external circuits of the first bass voice coil 312 and the second bass voice coil 313. In this embodiment, the centering support can be arranged at the bottom of the first bass voice coil 312 and the second bass voice coil 313, and the centering support is located at the four corners of the sound-generating device 100 or in the short axis or long axis direction of the sound-generating device 100. Of course, the centering support can also be arranged at the top of the first bass voice coil 312 and the second bass voice coil 313, and the centering support is located between the first bass voice coil 312 and the second bass voice coil 313 and the bass diaphragm 311, which is not limited here.

[0073] In one embodiment, the direction of the current in the second bass voice coil 313 is opposite to the direction of the current in the first bass voice coil 312. It can be understood that the current in the second bass voice coil 313 and the current in the first bass voice coil 312 are counterclockwise and clockwise respectively, and such a configuration can ensure that the vibration direction generated by the first bass voice coil 312 in the first bass magnetic gap 215 is the same as the vibration direction generated by the second bass voice coil 313 in the second bass magnetic gap 216, thereby ensuring that the bass diaphragm 311 is vibrated in the same direction at the same time, so as to improve the vibration effect on the bass diaphragm 311.

[0074] In this embodiment, the magnetic yoke 211 of the bass magnetic circuit portion 21 in the magnetic circuit system 2 is opposite to the bass diaphragm 311, the central magnetic portion 212, the common magnetic portion 213 and the side magnetic portion 214 are all arranged on the side of the magnetic yoke 211 facing the bass diaphragm 311, and the bass magnetic circuit portion 21 can be connected to the outer shell 1 through the side magnetic portion 214 and / or the magnetic yoke 211.

[0075] Optionally, the magnetic yoke 211 may be a magnetic plate or a magnetic basin frame, etc., which is not limited here. The magnetic yoke 211 is used to support and install the central magnetic part 212, the common magnetic part 213 and the side magnetic part 214. In this embodiment, the magnetic yoke 211 is bonded to the central magnetic part 212, the common magnetic part 213 and the side magnetic part 214, and the side magnetic part 214 is bonded to the housing 1.

[0076] In one embodiment, the tweeter magnetic circuit portion 22 is located on the side of the side magnetic circuit 214, wherein the bass vibration unit 31 has a bass radiation surface 3117, and the tweeter vibration unit 32 has a tweeter radiation surface 323, and the bass radiation surface 3117 and the tweeter radiation surface 323 are arranged at an angle.

[0077] It can be understood that by arranging the tweeter magnetic circuit part 22 on the side of the side magnetic part 214, and connecting the tweeter vibration unit 32 to the outer shell 1, and arranging it opposite to and spaced apart from the tweeter magnetic circuit part 22, the tweeter magnetic circuit part 22 is utilized to drive the tweeter vibration unit 32 to vibrate and make sound, and at the same time, the bass radiation surface 3117 of the bass vibration unit 31 and the treble radiation surface 323 of the tweeter vibration unit 32 are arranged at an angle, so that the bass sound and the treble sound of the sound-generating device 100 do not interfere with each other, thereby improving the sound effect.

[0078] In one embodiment, if Figures 1 to 3 , Figure 6 As shown, an inner ring hole 3112 is provided in the center of the bass diaphragm 311, the outer periphery of the bass diaphragm 311 is connected to the outer shell 1, the inner periphery of the bass diaphragm 311 is connected to the bass magnetic circuit part 21, and the top surface height of the bass diaphragm 311 is lower than the top surface height of the bass magnetic circuit part 21.

[0079] It can be understood that by setting the bass diaphragm 311 as a ring structure, the inner periphery of the bass diaphragm 311 is connected to the bass magnetic circuit part 21, so that part of the bass magnetic circuit part 21 corresponds to the inner ring hole 3112, and the top surface height of the bass diaphragm 311 is lower than the top surface height of the bass magnetic circuit part 21. When the sound-emitting device 100 is applied to a module or electronic device, the bass magnetic circuit part 21 of the sound-emitting device 100 can be used to abut against the inner wall of the shell of the electronic device, so that a bass front cavity is formed between the bass diaphragm 311 and the shell, that is, there is no need to increase the front cavity space additionally, and the front sound cavity structure can be formed by utilizing the height difference between the bass diaphragm 311 in the magnetic circuit system 2 and the vibration system 3, thereby effectively reducing the Z-direction height of the electronic device.

[0080] The sound-generating device 100 of the present invention connects the magnetic circuit system 2 to one end of the housing 1, and sets the magnetic circuit system 2 as a bass magnetic circuit part 21 and a treble magnetic circuit part 22, and sets the vibration system 3 as a bass vibration unit 31 and a treble vibration unit 32, so that the periphery of the bass diaphragm 311 is connected to the housing 1, and the treble vibration unit 32 is connected to the housing 1 and is arranged opposite to and spaced from the treble magnetic circuit part 22, thereby realizing the integration of the bass and treble units into one; at the same time, by setting the bass magnetic circuit part 21 of the magnetic circuit system 2 as a magnetic yoke 211 and a central magnetic part 212, a common magnetic part 213 and a side magnetic part 214 arranged on the magnetic yoke 211, the common magnetic part 213 is located on the outside of the central magnetic part 212 and is spaced from the central magnetic part 212 to form a first bass magnetic gap 215, and the side magnetic part 214 is located on the outside of the common magnetic part 213 and is spaced from the common magnetic part 214 to form a first bass magnetic gap 215. The magnetic part 213 is spaced to form a second bass magnetic gap 216, so that the first bass voice coil 312 of the bass vibration unit 31 in the vibration system 3 is set corresponding to the first bass magnetic gap 215, and the second bass voice coil 313 is set corresponding to the second bass magnetic gap 216, forming an inner and outer double voice coil structure, so that current is passed through the first bass voice coil 312 and the second bass voice coil 313, so that the two voice coils vibrate in the magnetic fields of the first bass magnetic gap 215 and the second bass magnetic gap 216 formed by the bass magnetic circuit part 21 of the magnetic circuit system 2 respectively, and drive the bass diaphragm 311 to vibrate and make sound, so as to improve the BL value; further, by setting the bass radiation surface 3117 formed by the bass vibration unit 31 and the treble radiation surface 323 formed by the treble vibration unit 32 at an angle, the bass sound and the treble sound of the sound-generating device 100 do not interfere with each other, thereby improving the sound effect.

[0081] In one embodiment, the housing 1 includes a frame body 11 and an installation side wall 12, the installation side wall 12 is arranged on one side of the frame body 11, and is enclosed with the outer wall of the frame body 11 to form an installation space 121, and the installation side wall 12 is provided with an installation hole 122 connected to the installation space 121; the periphery of the bass diaphragm 311 is connected to one end of the frame body 11, the side magnetic portion 214 is connected to the other end of the frame body 11, the tweeter magnetic circuit portion 22 is arranged in the installation space 121, and is arranged corresponding to the installation hole 122, and the tweeter vibration unit 32 is connected to the installation side wall 12, and is covered in the installation hole 122.

[0082] In this embodiment, if Figures 1 to 4As shown, by setting the outer shell 1 as a frame body 11 and an installation side wall 12, the frame body 11 is made into a square or rectangular frame, so that the frame body 11 is used to install and fix the bass magnetic circuit part 21 of the magnetic circuit system 2 and the bass vibration unit 31 of the vibration system 3, and at the same time, the installation side wall 12 is set on one side of the frame body 11, and is enclosed with the outer wall of the frame body 11 to form an installation space 121, and the installation side wall 12 is provided with an installation hole 122 connected to the installation space 121, so that the installation space 121 formed by the installation side wall 12 and the frame body 11 can be used to install and fix the treble magnetic circuit part 22 of the magnetic circuit system 2, and at the same time, the installation side wall 12 is used to install and fix the treble vibration unit 32 of the vibration system 3.

[0083] It can be understood that the plane where the frame body 11 is connected to the bass diaphragm 311 of the bass vibration unit 31 and the plane where the mounting side wall 12 is connected to the tweeter vibration unit 32 are set at an angle, so that the bass radiation surface 3117 of the bass vibration unit 31 and the tweeter radiation surface 323 of the tweeter vibration unit 32 are set at an angle. Optionally, the bass radiation surface 3117 and the tweeter radiation surface 323 are set vertically.

[0084] In this embodiment, if Figures 1 to 4 As shown, the bass diaphragm 311 of the bass vibration unit 31 in the vibration system 3 vibrates in the vertical direction, that is, the bass radiation surface 3117 of the bass vibration unit 31 is horizontally arranged (that is, perpendicular to the vertical direction), and the bass vibration unit 31 radiates sound waves in the vertical direction; the tweeter vibration unit 32 in the vibration system 3 vibrates in the horizontal direction, that is, the tweeter radiation surface 323 of the tweeter vibration unit 32 is vertically arranged (that is, perpendicular to the horizontal direction), and the tweeter vibration unit 32 radiates sound waves in the horizontal direction.

[0085] In one embodiment, the tweeter magnetic circuit part 22 includes a first magnet 221, a second magnet 222 and a third magnet 223 arranged in the installation space 121, the first magnet 221, the second magnet 222 and the third magnet 223 are stacked in a direction parallel to the tweeter radiation surface 323, the first magnet 221 is adjacent to the magnetic yoke 211, and the third magnet 223 is connected to the frame body 11; the tweeter vibration unit 32 includes a tweeter diaphragm 321 and a tweeter voice coil 322 connected to the tweeter diaphragm 321, the tweeter diaphragm 321 is connected to the installation side wall 12 and covers the installation hole 122, the tweeter voice coil 322 is located in the installation hole 122, and is opposite to and spaced from the tweeter magnetic circuit part 22.

[0086] In this embodiment, if Figures 2 to 4As shown, by setting the tweeter magnetic circuit part 22 to a stacked first magnet 221, a second magnet 222 and a third magnet 223, the first magnet 221, the second magnet 222 and the third magnet 223 are stacked in a direction parallel to the tweeter radiation surface 323, so that the tweeter diaphragm 321 and the tweeter voice coil 322 of the tweeter vibration unit 32 are opposite to and spaced from the first magnet 221, the second magnet 222 and the third magnet 223.

[0087] Optionally, the tweeter voice coil 322 is a ring-shaped planar voice coil. In this embodiment, the tweeter voice coil 322 has two long axis sides and two short axis sides connected end to end. Optionally, the two long axis sides or the two short axis sides of the tweeter voice coil 322 correspond to the connection between the first magnet 221 and the second magnet 222, and the connection between the second magnet 222 and the third magnet 223, respectively, so that the magnetic lines of force generated by the tweeter magnetic circuit part 22 smoothly pass through the two long axis sides or the two short axis sides of the tweeter voice coil 322.

[0088] In this embodiment, the tweeter diaphragm 321 may be a planar diaphragm, and the tweeter voice coil 322 is fixed to the side of the tweeter diaphragm 321 facing the tweeter magnetic circuit part 22 , and is opposite to and spaced from the tweeter magnetic circuit part 22 .

[0089] In one embodiment, the tweeter diaphragm 321 is a planar diaphragm, and the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy. In this embodiment, the manufacturing process of the planar diaphragm is simple, which reduces the production cost. Optionally, the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy. The above materials have high rigidity and low density, and the manufactured planar diaphragm is light in weight, which improves the sound performance of the planar diaphragm.

[0090] Optionally, the tweeter diaphragm 321 is a planar diaphragm, and a reinforcement portion is provided in the central area of ​​the tweeter diaphragm 321. It can be understood that by providing a reinforcement portion in the central area of ​​the planar diaphragm, the rigidity of the planar diaphragm can be further improved, and its sound performance can be improved. The material of the reinforcement portion can be selected from any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy, which can be flexibly selected according to needs and is not limited here.

[0091] Of course, in other embodiments, the tweeter diaphragm 321 includes a folded ring portion and a reinforcement portion disposed at the center of the folded ring portion. Thus, after the material and thickness of the reinforcement portion are determined, the width or material of the folded ring portion can be further adjusted to adjust the resonance frequency to meet usage requirements.

[0092] In one embodiment, the tweeter voice coil 322 is fixed to the side of the tweeter diaphragm 321 facing the tweeter magnetic circuit part 22, the tweeter voice coil 322 is a flat voice coil formed by winding enameled wire, and the central axis of the flat voice coil is perpendicular to the tweeter radiation surface 323; or, the tweeter voice coil 322 includes a coil structure formed by a circuit board and a conductive circuit arranged on the circuit board.

[0093] It is understandable that the tweeter voice coil 322 may be formed by winding an enameled wire; or the tweeter voice coil 322 includes a coil structure formed by a circuit board and a conductive line arranged on the circuit board. Compared with a conventional annular voice coil, a flat voice coil has a smaller axial dimension, which can further reduce the space occupied by the sound device 100 along the vibration direction of the tweeter vibration unit 32.

[0094] In one embodiment, the first magnet 221 , the second magnet 222 and the third magnet 223 are magnetized in a direction perpendicular to the tweeter radiation surface 323 , and the magnetization direction of the second magnet 222 is opposite to the magnetization directions of the first magnet 221 and the third magnet 223 .

[0095] In this embodiment, by magnetizing the first magnet 221, the second magnet 222 and the third magnet 223 of the tweeter magnetic circuit part 22, the first magnet 221, the second magnet 222 and the third magnet 223 are all magnetized in a direction perpendicular to the tweeter radiation surface 323, that is, the first magnet 221, the second magnet 222 and the third magnet 223 are all magnetized in a horizontal direction, and the magnetizing direction of the second magnet 222 is opposite to the magnetizing direction of the first magnet 221 and the third magnet 223. In this way, the magnetic field strength of the tweeter magnetic circuit part 22 is effectively improved, the number of magnetic lines of force passing through the tweeter voice coil 322 is increased, the magnetic field force on the tweeter voice coil 322 is increased, the BL value is effectively improved, and the sensitivity of the sound-emitting device 100 is improved.

[0096] It can be understood that the magnetic pole of the first magnet 221 facing the tweeter voice coil 322 is the same as the magnetic pole of the third magnet 223 facing the tweeter voice coil 322 , and the magnetic pole of the second magnet 222 facing the tweeter voice coil 322 is opposite to the magnetic poles of the first magnet 221 and the third magnet 223 facing the tweeter voice coil 322 .

[0097] In this embodiment, when the second magnet 222 is magnetized from left to right, the first magnet 221 and the third magnet 223 are magnetized from right to left, that is, when the S pole of the second magnet 222 is on the left and the N pole is on the right, the S pole of the first magnet 221 and the third magnet 223 is on the right and the N pole is on the left, and vice versa.

[0098] In another embodiment, the second magnet 222 is magnetized in a direction perpendicular to the tweeter radiation surface 323, the first magnet 221 and the third magnet 223 are magnetized in a direction parallel to the tweeter radiation surface 323, and the magnetization direction of the first magnet 221 is opposite to the magnetization direction of the third magnet 223, and the magnetic pole of the first magnet 221 close to the second magnet 222 is the same as the magnetic pole of the second magnet 222 close to the tweeter radiation surface 323.

[0099] In this embodiment, the magnetization direction of the second magnet 222 is set at an angle to the magnetization directions of the first magnet 221 and the third magnet 223. Optionally, the magnetization direction of the second magnet 222 is set perpendicular to the magnetization directions of the first magnet 221 and the third magnet 223. Specifically, the second magnet 222 is magnetized in a direction perpendicular to the tweeter radiation surface 323, that is, the second magnet 222 is magnetized in a horizontal direction, and the first magnet 221 and the third magnet 223 are magnetized in a direction parallel to the tweeter radiation surface 323, that is, the first magnet 221 and the third magnet 223 are magnetized in a vertical direction.

[0100] Optionally, the magnetization direction of the first magnet 221 is opposite to that of the third magnet 223, and the magnetic pole of the first magnet 221 close to the second magnet 222 is the same as the magnetic pole of the second magnet 222 close to the tweeter radiation surface 323. It can be understood that in this way, the tweeter magnetic circuit part 22 forms a Halbach magnetic array, which has a magnetic field enhancement side facing the tweeter voice coil 322, effectively improves the magnetic field strength, increases the number of magnetic field lines passing through the tweeter voice coil 322, increases the magnetic field force on the tweeter voice coil 322, effectively improves the BL value, and improves the sensitivity of the sound-generating device 100.

[0101] It should be noted that Figure 2 The arrow direction in the magnetic circuit system 2 is the direction from the S pole to the N pole, that is, the magnetization direction. In this embodiment, when the second magnet 222 is magnetized from left to right, the first magnet 221 is magnetized from bottom to top, and the third magnet 223 is magnetized from top to bottom, that is, when the S pole of the second magnet 222 is on the left and the N pole is on the right, the N pole of the first magnet 221 is on the top and the S pole is on the bottom, and the N pole of the third magnet 223 is on the bottom and the S pole is on the top, and vice versa.

[0102] In one embodiment, the central magnetic portion 212 includes a first central magnet 2121, a central magnetic conductive plate 2122 and a second central magnet 2123 which are stacked, the common magnetic portion 213 includes a first common magnet 2131, a common magnetic conductive plate 2132 and a second common magnet 2133 which are stacked, the side magnetic portion 214 includes a side magnet 2141 and a side magnetic conductive plate 2142 which are stacked, and the side magnetic conductive plate 2142 is connected to the outer shell 1; wherein the first central magnet 2121, the central magnetic conductive plate 2122 and the second central magnet 2123 correspond one-to-one with the first common magnet 2131, the common magnetic conductive plate 2132 and the second common magnet 2133 in a direction parallel to the bass radiation surface 3117.

[0103] In this embodiment, if Figures 2 to 5 As shown, by setting the central magnetic part 212 of the bass magnetic circuit part 21 as a first central magnet 2121, a central magnetic plate 2122 and a second central magnet 2123 which are stacked, and setting the common magnetic part 213 as a first common magnet 2131, a common magnetic plate 2132 and a second common magnet 2133 which are stacked, the first central magnet 2121, the central magnetic plate 2122 and the second central magnet 2123 of the central magnetic part 212 are respectively connected to the first common magnet 2131, the common magnetic plate 2132 and the second common magnet 2133 of the common magnetic part 213. The common magnetic conductive plate 2132 and the second common magnet 2133 correspond one to one in the vibration direction perpendicular to the bass diaphragm 311, so that the common magnetic portion 213 is shared by the central magnetic portion 212 and the side magnetic portion 214, and a first bass magnetic gap 215 and a second bass magnetic gap 216 are formed, so that the first bass voice coil 312 and the second bass voice coil 313 can fully utilize the magnetic field of the magnetic circuit system 2, improve the magnetic energy utilization rate of the magnetic circuit system 2, thereby improving the loudness and sensitivity of the sound-generating device 100, so as to improve product performance.

[0104] It can be understood that the bass radiation surface 3117 is arranged perpendicular to the vibration direction of the bass diaphragm 311, and the vibration direction of the bass diaphragm 311 is consistent with the sound wave radiation direction of the bass diaphragm 311. Optionally, the side magnetic plate 2142 of the side magnetic portion 214 can be bonded to the housing 1. In this embodiment, the side magnetic plate 2142 and the housing 1 can be an integrally formed structure.

[0105] In one embodiment, the magnetic yoke 211 includes a first magnetic yoke 2111 and a second magnetic yoke 2112, the first central magnet 2121, the first common magnet 2131 and the side magnet 2141 are connected to the first magnetic yoke 2111, and the second central magnet 2123 and the second common magnet 2133 are connected to the second magnetic yoke 2112; the inner periphery of the bass diaphragm 311 is connected to the second magnetic yoke 2112 so that part of the second magnetic yoke 2112 corresponds to the inner ring hole 3112.

[0106] In this embodiment, if Figures 1 to 3 , Figure 5 As shown, by setting the magnetic yoke 211 as a first magnetic yoke 2111 and a second magnetic yoke 2112 which are arranged opposite to each other, an installation space is formed between the first magnetic yoke 2111 and the second magnetic yoke 2112, the central magnetic portion 212, the common magnetic portion 213 and the side magnetic portion 214 are all arranged on the first magnetic yoke 2111, and the second magnetic yoke 2112 is connected to one end of the central magnetic portion 212 and the common magnetic portion 213 away from the first magnetic yoke 2111.

[0107] It can be understood that the central magnetic part 212 and the common magnetic part 213 are arranged between the first magnetic yoke 2111 and the second magnetic yoke 2112, that is, the first central magnet 2121 of the central magnetic part 212 and the first common magnet 2131 of the common magnetic part 213 are connected to the first magnetic yoke 2111, and the second central magnet 2123 of the central magnetic part 212 and the second common magnet 2133 of the common magnetic part 213 are connected to the second magnetic yoke 2112. By setting the bass diaphragm 311 as a ring structure, the inner ring of the bass diaphragm 311 is connected to the second magnetic yoke 2112, so that part of the second magnetic yoke 2112 corresponds to the inner ring hole 3112, and the side magnetic portion 214 is located between the magnetic yoke 211 and the bass diaphragm 311, so that the magnetic flux lines generated by the central magnetic portion 212 and the magnetic flux lines generated by the common magnetic portion 213 can effectively form a magnetic circuit passing through the first bass magnetic gap 215, and the magnetic flux lines generated by the common magnetic portion 213 and the magnetic flux lines generated by the side magnetic portion 214 can form a magnetic circuit passing through the second bass magnetic gap 216, effectively increasing the density of the magnetic flux of the first bass magnetic gap 215 and the second bass magnetic gap 216, so that the first bass voice coil 312 and the second bass voice coil 313 are in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100.

[0108] It can be understood that by connecting the inner periphery of the bass diaphragm 311 with the second yoke 2112, the bass diaphragm 311 and the second yoke 2112 are sealed and connected, thereby improving the sealing performance. At the same time, part of the second yoke 2112 corresponds to the inner ring hole 3112. When the sound-generating device 100 is applied to a module or electronic device, the second yoke 2112 of the magnetic circuit system 2 of the sound-generating device 100 can be used to abut against the inner wall of the shell of the electronic device, so that a bass front cavity is formed between the bass diaphragm 311 and the shell, that is, there is no need to increase the front cavity space. The height difference between the second yoke 2112 of the magnetic circuit system 2 and the bass diaphragm 311 in the vibration system 3 can be used to form a front sound cavity structure, thereby effectively reducing the Z-direction height of the electronic device.

[0109] Optionally, the central magnetic portion 212, the common magnetic portion 213 and the side magnetic portion 214 are all magnetized in the vertical direction, the magnetization direction of the common magnetic portion 213 is opposite to that of the central magnetic portion 212 and the side magnetic portion 214, and the magnetization direction of the central magnetic portion 212 and the side magnetic portion 214 is the same. Such an arrangement can optimize the nonlinear performance of the BL.

[0110] In one embodiment, the first central magnet 2121 and the second central magnet 2123 are magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the first central magnet 2121 and the second central magnet 2123 have the same magnetic poles near the central magnetic plate 2122; the first common magnet 2131 and the second common magnet 2133 are magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the first common magnet 2131 and the second common magnet 2133 have the same magnetic poles near the common magnetic plate 2132, and the side magnet 2141 is magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3. The vibration direction of the mid-bass diaphragm 311 is magnetized; the magnetic poles of the first center magnet 2121 and the second center magnet 2123 close to the center magnetic conductive plate 2122 are opposite to the magnetic poles of the first common magnet 2131 and the second common magnet 2133 close to the common magnetic conductive plate 2132; the magnetic poles of the side magnet 2141 close to the side magnetic conductive plate 2142 are the same as the magnetic poles of the first center magnet 2121 close to the center magnetic conductive plate 2122, and the magnetic poles of the side magnet 2141 close to the side magnetic conductive plate 2142 are opposite to the magnetic poles of the first common magnet 2131 close to the common magnetic conductive plate 2132.

[0111] In this embodiment, if Figure 2 and Figure 3 As shown, the vibration direction of the bass diaphragm 311 in the vibration system 3 can be selected as the vertical direction. Optionally, the first common magnet 2131 and the second common magnet 2133 of the common magnetic part 213 are magnetized in the vertical direction, and the first center magnet 2121 and the second center magnet 2123 of the center magnetic part 212 are magnetized in the vertical direction.

[0112] It should be noted that Figure 2 The arrow direction in the magnetic circuit system 2 is from the S pole to the N pole, i.e., the magnetization direction. The first center magnet 2121 and the second center magnet 2123 of the center magnetic part 212 are magnetized in the vertical direction in opposite directions; the first common magnet 2131 and the second common magnet 2133 of the common magnetic part 213 are magnetized in the vertical direction in opposite directions. It can be understood that such an arrangement allows the center magnetic part 212, the common magnetic part 213 and the side magnetic part 214 to form a magnetic circuit that passes through the first bass voice coil 312 and the second bass voice coil 313 in the first bass magnetic gap 215 and the second bass magnetic gap 216.

[0113] It can be understood that the magnetization direction of the first center magnet 2121 is opposite to the magnetization direction of the second center magnet 2123, so that the magnetic flux lines of the first center magnet 2121 and the second center magnet 2123 of the center magnetic part 212 are gathered on the center magnetic conductive plate 2122, and the magnetic field with a stronger magnetic field strength generated by the center magnetic part 212 passes through the first bass magnetic gap 215, thereby increasing the density of the magnetic flux of the first bass magnetic gap 215, increasing the number of magnetic flux lines passing through the first bass voice coil 312, and increasing the magnetic field force on the first bass voice coil 312, thereby effectively improving the BL value. At the same time, the magnetization direction of the first common magnet 2131 is opposite to the magnetization direction of the second common magnet 2133, so that the magnetic flux lines of the first common magnet 2131 and the second common magnet 2133 of the common magnetic part 213 are gathered on the common magnetic conductive plate 2132, and the magnetic field with a stronger magnetic field strength generated by the common magnetic part 213 passes through the first bass magnetic gap 215 and the second bass magnetic gap 216, thereby increasing the density of the magnetic flux of the first bass magnetic gap 215 and the second bass magnetic gap 216, increasing the number of magnetic flux lines passing through the first bass voice coil 312 and the second bass voice coil 313, increasing the magnetic field force on the first bass voice coil 312 and the second bass voice coil 313, and effectively improving the BL value.

[0114] It should be noted that if Figure 2 As shown, when the first central magnet 2121 is magnetized from bottom to top, the second central magnet 2123 is magnetized from top to bottom, the first common magnet 2131 is magnetized from top to bottom, the second common magnet 2133 is magnetized from bottom to top, and the side magnet 2141 is magnetized from bottom to top, that is, the N pole of the first central magnet 2121 is at the top and the S pole is at the bottom, the N pole of the second central magnet 2123 is at the bottom and the S pole is at the top, the N pole of the first common magnet 2131 is at the bottom and the S pole is at the top, the N pole of the second common magnet 2133 is at the top and the S pole is at the bottom, and the N pole of the side magnet 2141 is at the top and the S pole is at the bottom, and vice versa.

[0115] It can be understood that when the first center magnet 2121 is magnetized from bottom to top, when the second magnet 222 of the tweeter magnetic circuit part 22 is magnetized from left to right, the first magnet 221 and the third magnet 223 are both magnetized from right to left; or, when the second magnet 222 is magnetized from left to right, the first magnet 221 is magnetized from bottom to top, and the third magnet 223 is magnetized from top to bottom, which is not limited here.

[0116] In this embodiment, if Figure 2As shown, the magnetization direction of the side magnet 2141 of the side magnet portion 214 is the same as the magnetization direction of the first center magnet 2121, and is opposite to the magnetization direction of the first common magnet 2131. Optionally, the magnetic pole of the side magnet 2141 close to the side magnetic conductive plate 2142 is the same as the magnetic pole of the first center magnet 2121 close to the center magnetic conductive plate 2122, and the magnetic pole of the side magnet 2141 close to the side magnetic conductive plate 2142 is opposite to the magnetic pole of the first common magnet 2131 close to the common magnetic conductive plate 2132, which is not limited here.

[0117] It can be understood that the first central magnet 2121 and the second central magnet 2123 have the same magnetic poles near the central magnetic plate 2122, that is, the magnetic poles of the first central magnet 2121 and the second central magnet 2123 near the central magnetic plate 2122 are both N poles or S poles. The first common magnet 2131 and the second common magnet 2133 have the same magnetic poles near the common magnetic plate 2132, that is, the magnetic poles of the first common magnet 2131 and the second common magnet 2133 near the common magnetic plate 2132 are both S poles or N poles.

[0118] Optionally, when the magnetic poles of the first center magnet 2121 and the second center magnet 2123 close to the center magnetic conductive plate 2122 are both N poles, the magnetic poles of the first common magnet 2131 and the second common magnet 2133 close to the common magnetic conductive plate 2132 are both S poles, and vice versa. Such an arrangement can make the central magnetic portion 212 and the side magnetic portion 214 form a magnetic circuit of the first bass voice coil 312 passing through the first bass magnetic gap 215 and the second bass magnetic gap 216, which is not limited here.

[0119] In one embodiment, the first center magnet 2121 includes a plurality of first center magnets 2121, which are arranged adjacent to each other and located between the center magnetic plate 2122 and the first magnetic yoke 2111 of the magnetic yoke 211; wherein the plurality of first center magnets 2121 are magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the magnetization directions of the plurality of first center magnets 2121 are the same.

[0120] Optionally, multiple first center magnets 2121 are laid flat between the first magnetic yoke 2111 of the magnetic yoke 211 and the center magnetic plate 2122. Multiple first center magnets 2121 are magnetized in the vertical direction, and the magnetization directions of multiple first center magnets 2121 are the same. That is, multiple first center magnets 2121 are magnetized in the direction of movement of the first bass voice coil 312, and multiple first center magnets 2121 are magnetized upward or downward at the same time, which is not limited here.

[0121] In one embodiment, the second center magnet 2123 includes a plurality of second center magnets 2123, which are adjacently arranged and located on the side of the center magnetic conductive plate 2122 facing away from the first center magnet 2121; wherein the plurality of second center magnets 2123 are magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the magnetization directions of the plurality of second center magnets 2123 are the same.

[0122] Optionally, multiple second center magnets 2123 are laid flat on the side of the center magnetic conductive plate 2122 facing away from the first center magnet 2121. Multiple second center magnets 2123 are magnetized in the vertical direction, and the magnetization directions of multiple second center magnets 2123 are the same. That is, multiple second center magnets 2123 are magnetized in the direction of movement of the first bass voice coil 312, and multiple second center magnets 2123 are magnetized upward or downward at the same time, which is not limited here.

[0123] In one embodiment, the first common magnet 2131 includes a plurality of first common magnets 2131 which are arranged adjacent to each other and located between the common magnetic plate 2132 and the first magnetic yoke 2111 of the magnetic yoke 211; wherein the plurality of first common magnets 2131 are all magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the magnetization directions of the plurality of first common magnets 2131 are the same.

[0124] Optionally, a plurality of first common magnets 2131 are laid flat between the first magnetic yoke 2111 of the magnetic yoke 211 and the common magnetic conductive plate 2132. The plurality of first common magnets 2131 are all magnetized in the vertical direction, and the magnetization directions of the plurality of first common magnets 2131 are the same. That is, the plurality of first common magnets 2131 are all magnetized in the direction in which the first bass voice coil 312 moves, and the plurality of first common magnets 2131 are magnetized upward or downward at the same time, which is not limited here.

[0125] In one embodiment, the second common magnet 2133 includes a plurality of second common magnets 2133 which are arranged adjacent to each other and are located on the side of the common magnetic conductive plate 2132 which is away from the first common magnet 2131; wherein the plurality of second common magnets 2133 are all magnetized along the vibration direction of the bass diaphragm 311 in the vibration system 3, and the magnetization directions of the plurality of second common magnets 2133 are the same.

[0126] Optionally, the plurality of second common magnets 2133 are laid flat on the side of the common magnetic conductive plate 2132 facing away from the first common magnet 2131. The plurality of second common magnets 2133 are all magnetized in the vertical direction, and the magnetization directions of the plurality of second common magnets 2133 are the same. That is, the plurality of second common magnets 2133 are all magnetized in the direction in which the first bass voice coil 312 moves, and the plurality of second common magnets 2133 are magnetized upward or downward at the same time, which is not limited here.

[0127] In one embodiment, the bass diaphragm 311 includes an inner ring portion 3111, a first folded ring 3113 arranged around the inner ring portion 3111, a straight portion 3114 arranged around the first folded ring 3113, a second folded ring 3115 arranged around the straight portion 3114, and a fixing portion 3116 connected to the outer side of the second folded ring 3115, the fixing portion 3116 is connected to the outer shell 1, the inner ring portion 3111 forms an inner ring hole 3112, and the inner ring portion 3111 is connected to the periphery of the second magnetic yoke 2112.

[0128] In this embodiment, if Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the inner ring portion 3111 , the first fold ring 3113 , the straight portion 3114 , the second fold ring 3115 and the fixing portion 3116 of the bass diaphragm 311 may be an integrally formed structure, thereby ensuring the vibration performance and structural strength of the bass diaphragm 311 .

[0129] In this embodiment, the top surface height of the side magnetic portion 24 is lower than the top surface height of the common magnetic portion 23, the protruding direction of the first fold ring 313 of the diaphragm 31 is toward the direction away from the magnetic circuit system 2, the protruding direction of the second fold ring 315 is opposite to the protruding direction of the first fold ring 313, the first fold ring 313 is at least partially opposite to the second magnetic gap 26, and the second fold ring 315 is at least partially opposite to the side magnetic circuit 24. The protruding direction of the first fold ring 313 is toward the direction away from the magnetic circuit system 2, and the first fold ring 313 is at least partially opposite to the second magnetic gap 26, thereby avoiding interference between the first fold ring 313 and the second yoke 212 and the common magnetic portion 23; at the same time, the top surface height of the side magnetic portion 24 is lower than the top surface height of the common magnetic portion 23, and the protruding direction of the second fold ring 315 is opposite to the protruding direction of the first fold ring 313, and the second fold ring 315 is at least partially opposite to the side magnetic circuit 24. When the sound-emitting device 100 is installed in a sound module or an electronic device, the sound output area of ​​the front cavity can be increased, which facilitates the smooth transmission of the sound waves of the diaphragm 31 and improves the sound quality effect of the sound-emitting device 100.

[0130] In one embodiment, the bass diaphragm 311 further includes a reinforcement portion, which is disposed on the straight portion 3114. It can be understood that by providing the reinforcement portion, the structural strength of the bass diaphragm 311 can be effectively strengthened, thereby improving the connection stability of the first bass voice coil 312 and the second bass voice coil 313, and preventing the bass diaphragm 311 from tearing when the first bass voice coil 312 and the second bass voice coil 313 drive the bass diaphragm 311 to vibrate.

[0131] In one embodiment, a avoidance structure 2134 is disposed at the periphery of the second common magnet 2133 adjacent to the second bass magnetic gap 216 .

[0132] In this embodiment, if Figure 2, Figure 3 and Figure 6 As shown, by setting an avoidance structure 2134 on the edge of the second common magnet 2133 of the common magnetic part 213, that is, setting a rounded corner, a chamfered corner, a cut corner or a step structure on the edge of the second common magnet 2133, the bass diaphragm 311 can be avoided, and at the same time, magnetic leakage can be effectively prevented to improve the BL value.

[0133] Optionally, the avoidance structure 2134 is at least one of an inclined surface, a rounded corner, a chamfer, and a step structure.

[0134] In one embodiment, the avoidance structure 2134 may be an inclined slope. Optionally, the angle formed by the avoidance structure 2134 and the surface of the second common magnet 2133 facing away from the common magnetic conductive plate 2132 is greater than 90° and less than 180°. In this embodiment, the angle formed by the inclined slope of the avoidance structure 2134 and the surface of the second common magnet 2133 facing away from the common magnetic conductive plate 2132 may further be selected to be in the range of 100° to 150°, which is not limited here. Optionally, the angle is 100°, 110°, 120°, 130°, 140°, 150°, etc., which is not limited here.

[0135] It can be understood that the avoidance structure 2134 surrounds the periphery of the second common magnet 2133 on the side facing away from the common magnetic conductive plate 2132, that is, the avoidance structure 2134 is an integral annular inclined surface. Of course, in other embodiments, the avoidance structure 2134 includes multiple avoidance structures 2134, which are arranged at intervals and surround the periphery of the second common magnet 2133 on the side facing away from the common magnetic conductive plate 2132. In this case, two adjacent avoidance structures 2134 are not connected and have a certain distance between them. Alternatively, the avoidance structure 2134 includes multiple adjacent avoidance structures 2134 connected end to end to form a closed annular structure, and surrounds the periphery of the second common magnet 2133 on the side facing away from the common magnetic conductive plate 2132. In this case, adjacent avoidance structures 2134 in the multiple avoidance structures 2134 are adjacent and form an annular structure. Optionally, the angles formed by the multiple avoidance structures 2134 and the surface of the second common magnet 2133 facing away from the common magnetic conductive plate 2132 can be the same, different, or at least partially the same, which is not limited here.

[0136] In one embodiment, the second magnetic yoke 2112 includes a protrusion 2113 and an edge 2114 connected to the protrusion 2113, the inner ring portion 3111 is connected to the edge 2114, so that the protrusion 2113 passes through the inner ring hole 3112, the protrusion 2113 faces the central magnetic portion 212 to form a recessed groove 2115, the second central magnet 2123 has a protrusion 2124 protruding the second common magnet 2133, the protrusion 2124 is accommodated and limited in the recessed groove 2115, and the inner periphery of the bass diaphragm 311 is connected to the edge 2122. That is, the inner ring portion 311 of the bass diaphragm 311 is connected to the edge 2122.

[0137] In this embodiment, if Figures 1 to 3 , Figure 5 As shown, by setting the second yoke 2112 as a protrusion 2113 passing through the inner ring hole 3112, and setting an edge portion 2114 on the periphery of the protrusion 2113, it is convenient to connect the inner ring portion 3111 of the bass diaphragm 311 with the edge portion 2114 to achieve sealing. It can be understood that when the sound-generating device 100 is applied to an electronic device, in order to reduce the Z-direction height of the electronic device, the protrusion 2113 of the sound-generating device 100 can be used to abut against the inner wall of the shell of the electronic device, without the need to increase the front cavity space, and the height difference between the protrusion 2113 and the bass diaphragm 311 in the vibration system 3 can be used to form a front sound cavity structure, which is not limited here.

[0138] It can be understood that by providing a recessed groove 2115 on the raised portion 2113 of the second magnetic yoke 2112, part of the second central magnet 2123 is accommodated and limited in the recessed groove 2115, that is, the second central magnet 2123 has a protruding portion 2124 protruding from the second common magnet 2133, and the protruding portion 2124 is accommodated and limited in the recessed groove 2115. In this way, the second central magnet 2123 of the central magnetic portion 212 can be used to support and install the second magnetic yoke 2112, and the magnet thickness of the second central magnet 2123 can be increased, so that the magnetic field strength of the central magnetic portion 212 can be further increased.

[0139] In one embodiment, the common magnetic portion 213 is provided with an avoidance gap 2135 connecting the first bass magnetic gap 215 and the second bass magnetic gap 216; the bass vibration unit 31 also includes a skeleton 314, the skeleton 314 includes a main body 3141 and a connecting portion 3142 connected to the main body 3141, the main body 3141 is connected to the bass diaphragm 311, the connecting portion 3142 is located in the avoidance gap 2135, and the two ends of the connecting portion 3142 are respectively connected to the first bass voice coil 312 and the second bass voice coil 313.

[0140] In this embodiment, if Figures 3 to 5 , Figure 7As shown, by setting the skeleton 314, the first bass voice coil 312 and the second bass voice coil 313 are connected to the bass diaphragm 311 through the skeleton 314, so that the first bass voice coil 312 and the second bass voice coil 313 can be ensured to be in a more reasonable magnetic field, that is, the area with the largest magnetic flux density, thereby effectively improving the BL value.

[0141] In one embodiment, the skeleton 314 includes a main body 3141 and a connecting portion 3142 . The main body 3141 is connected to the bass diaphragm 311 . The connecting portion 3142 is located in the avoidance gap 2135 , so that two ends of the connecting portion 3142 are respectively connected to the first bass voice coil 312 and the second bass voice coil 313 .

[0142] It can be understood that when there is only one skeleton 314, optionally, the main body 3141 is arranged in a rectangular ring, and the connecting parts 3142 include multiple connecting parts 3142, which are respectively arranged at the four corners of the main body 3141, and the common magnetic part 213 is provided with an avoidance gap 2135 corresponding to each connecting part 3142.

[0143] In this embodiment, the main body 3141 of the skeleton 314 is connected to the straight portion 3114 of the bass diaphragm 311, and a plurality of connecting portions 3142 are arranged at intervals. Optionally, the plurality of connecting portions 3142 are arranged corresponding to the four corners of the main body 3141. The common magnetic portion 213 is provided with an avoidance gap 2135 corresponding to each connecting portion 3142, so that each connecting portion 3142 is located in an avoidance gap 2135. Optionally, the four corners of the common magnetic portion 213 are respectively provided with avoidance gaps 2135.

[0144] Of course, the skeleton 314 may also include multiple skeletons, for example, the skeleton 314 includes two or four skeletons. Optionally, the skeleton 314 includes two, and the bass diaphragm 311 has two long axis sides and two short axis sides connected end to end; the two skeletons 314 are arranged at intervals along the long axis sides or the short axis sides, and are symmetrically arranged. Each skeleton 314 includes a main body 3141 and two connecting parts 3142. Optionally, the skeleton 314 includes four, and the four skeletons 314 are respectively arranged corresponding to the four corners of the common magnetic part 213. Each skeleton 314 includes a main body 3141 and a connecting part 3142.

[0145] In this embodiment, the side magnetic part 214 and the common magnetic part 213 are optionally both arranged in a rectangular frame. Optionally, each corner position of the common magnetic part 213 is provided with an avoidance gap 2135. Optionally, the number of the connecting parts 3142 of the skeleton 314 is consistent with the number of the avoidance gaps 2135, and they are arranged one by one, which is not limited here.

[0146] In one embodiment, if Figure 3 and Figure 7As shown, a first connection surface 3144 and a second connection surface 3145 are respectively provided at two ends of the connection portion 3142 . The first connection surface 3144 is connected to the first bass voice coil 312 , and the second connection surface 3145 is connected to the second bass voice coil 313 .

[0147] In this embodiment, the first connection surface 3144 is connected to the outer side wall of the first bass voice coil 312. The first connection surface 3144 is arranged corresponding to the corner position of the first bass voice coil 312, and the first connection surface 3144 can be arranged in a concave arc surface. The second connection surface 3145 is connected to the inner side wall of the second bass voice coil 313. The second connection surface 3145 is arranged corresponding to the corner position of the second bass voice coil 313, and the second connection surface 3145 can be arranged in a convex arc surface, which is not limited here.

[0148] In one embodiment, an escape space 113 is formed between the edge magnet portion 214 and the outer shell 1; the bass vibration unit 31 also includes a centering support piece 315, one end of the centering support piece 315 is connected to the outer shell 1, and the other end of the centering support piece 315 is located in the escape space 113; the skeleton 314 also includes an extension portion 3143, one end of the extension portion 3143 is connected to the periphery of the main body portion 3141, and the other end of the extension portion 3143 extends toward the centering support piece 315 and is connected to the centering support piece 315.

[0149] In this embodiment, if Figure 3 and Figure 4 As shown, by setting an escape space 113 between the housing 1 and the edge magnetic part 214, and setting a centering support 315, the centering support 315 is fixed to the housing 1, and one end of the centering support 315 extends to the escape space 113, and by setting an extension part 3143 on the frame 314, the extension part 3143 extends toward the centering support 315 and is connected to the centering support 315, so that the lead wires of the first bass voice coil 312 and the second bass voice coil 313 are guided to the centering support 315 through the frame 314, and are guided to the housing 1 through the centering support 315, and are connected to the external circuit. The frame 314 not only plays the role of connecting and fixing the first bass voice coil 312 and the second bass voice coil 313, but also plays the role of avoiding the first bass voice coil 312 and the second bass voice coil 313 from swinging or polarizing during the vibration process.

[0150] It can be understood that by providing the centering support plate 315, the lead wires of the first bass voice coil 312 and the second bass voice coil 313 can be connected to the external circuit by the centering support plate 315, and the swing or polarization of the first bass voice coil 312 and the second bass voice coil 313 during vibration can be avoided by the centering support plate 315.

[0151] In one embodiment, the housing 1 has two long sides 111 and two short sides 112 connected end to end, the centering support plates 315 include two, the two centering support plates 315 are symmetrically arranged and respectively correspond to the two short sides 112, and the tweeter magnetic circuit part 22 and the tweeter vibration unit 32 are arranged corresponding to the long sides 111.

[0152] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, two centering support pieces 315 are symmetrically distributed along the direction of the two long sides 111 or the direction of the two short sides 112 of the housing 1. Each centering support piece 315 includes an outer fixing portion, an elastic wall portion and an inner fixing portion connected in sequence, the outer fixing portion is connected to the housing 1 and / or the side magnetic portion 214, the inner fixing portion is connected to the extension portion 3143, the inner fixing portion is provided with an inner pad, and the leads of the first bass voice coil 312 and the second bass voice coil 313 extend along the extension portion 3143 to the inner pad.

[0153] Optionally, two centering supports 315 are symmetrically distributed along the two short sides 112 of the housing 1, and the treble magnetic circuit portion 22 and the treble vibration unit 32 are arranged corresponding to the long side 111. In this way, the first bass voice coil 312 and the second bass voice coil 313 can be connected and conducted with the external circuit through the centering support 315, and the first bass voice coil 312 and the second bass voice coil 313 can be centered. At the same time, the treble magnetic circuit portion 22 and the treble vibration unit 32 are arranged corresponding to the long side 111, so that the treble vibration unit 32 has a larger vibration space, thereby improving the treble sound effect.

[0154] In this embodiment, if Figure 3 and Figure 4 As shown, the outer fixing portion, the elastic wall portion and the inner fixing portion of the centering support 315 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support 315 and simplify the processing steps of the centering support 315. It can be understood that in order to ensure the deformation ability of the centering support 315, the elastic wall portion has at least one bend.

[0155] Optionally, the outer fixing portion, the elastic wall portion and the inner fixing portion of the centering support piece 315 may be located in the same plane. Of course, in other embodiments, the outer fixing portion and the inner fixing portion of the centering support piece 315 may also be located in different planes.

[0156] In one embodiment, the edge magnet portion 214 forms a closed integral ring structure. The annular edge magnet portion 214 surrounds the common magnet portion 213 and is spaced from the common magnet portion 213 to form an annular second low-frequency magnet gap 216. Optionally, the edge magnet portion 214 can be in the shape of a circular ring or a rectangular ring.

[0157] Of course, the edge magnet parts 214 include multiple, and adjacent edge magnet parts 214 are connected end to end to form a closed ring structure; or, the edge magnet parts 214 include multiple, and multiple edge magnet parts 214 are spaced and arranged around the common magnetic part 213, and there are gaps between adjacent edge magnet parts 214, which is not limited here.

[0158] In the present embodiment, the common magnetic part 213 is arranged around the central magnetic part 212. Optionally, the common magnetic part 213 can be a closed integrated annular structure, the annular common magnetic part 213 surrounds the central magnetic part 212, and is spaced from the central magnetic part 212 to form an annular first bass magnetic gap 215. Optionally, the common magnetic part 213 can be in the form of a circular ring or a rectangular ring, etc. Of course, the common magnetic part 213 includes a plurality of common magnetic parts 213, which are arranged around the central magnetic part 212, and adjacent common magnetic parts 213 are connected end to end to form a closed annular structure; or, the common magnetic part 213 includes a plurality of common magnetic parts 213, which are spaced and arranged around the central magnetic part 212, and there is a gap between adjacent common magnetic parts 213, and the gap can be an avoidance gap 2135, which is used to provide an avoidance space for the skeleton 314, which is not limited here.

[0159] In one embodiment, the common magnetic portion 213 includes a plurality of common magnetic portions 213 , which are disposed around the outer side of the central magnetic portion 212 , and adjacent common magnetic portions 213 are connected end to end to form a closed ring structure.

[0160] It can be understood that each of the multiple common magnetic parts 213 includes a first common magnet 2131, a common magnetic conductive plate 2132 and a second common magnet 2133 that are stacked. At this time, adjacent first common magnets 2131 in adjacent common magnetic parts 213 are connected end to end to form a closed ring structure, adjacent common magnetic conductive plates 2132 are connected end to end to form a closed ring structure, and adjacent second common magnets 2133 are connected end to end to form a closed ring structure, so that multiple common magnetic parts 213 are connected end to end to form a closed ring structure, which is not limited here.

[0161] In one embodiment, if Figures 3 to 5 As shown, the common magnetic portion 213 includes a plurality of common magnetic portions 213 , which are disposed around the outer side of the central magnetic portion 212 , and adjacent common magnetic portions 213 are spaced to form gaps.

[0162] It can be understood that each of the multiple shared magnetic parts 213 includes a first shared magnet 2131, a shared magnetic plate 2132, and a second shared magnet 2133 that are stacked. At this time, the adjacent first shared magnets 2131 in the adjacent shared magnetic parts 213 are spaced to form a gap, the adjacent shared magnetic plates 2132 are spaced to form a gap, and the adjacent second shared magnets 2133 are spaced to form a gap, so that the multiple shared magnetic parts 213 are spaced and surrounded to form a ring structure with a gap, which is not limited here. Optionally, the gap formed by the spacing between adjacent shared magnetic parts 213 is an avoidance gap 2135.

[0163] In this embodiment, the first common magnet 2131 and the second common magnet 2133 of the common magnetic part 213 may be selected as permanent magnets. It can be understood that the first common magnet 2131, the common magnetic plate 2132 and the second common magnet 2133 of the common magnetic part 213 are stacked along the moving direction of the first bass voice coil 312, that is, the first common magnet 2131 is connected to the first magnetic yoke 2111 of the magnetic yoke 211, the second common magnet 2133 is connected to the second magnetic yoke 2112 of the magnetic yoke 211, the common magnetic plate 2132 is stacked between the first common magnet 2131 and the second common magnet 2133, and the second common magnet 2133 is stacked on the side of the common magnetic plate 2132 facing away from the first common magnet 2131.

[0164] In one embodiment, a projection of at least part of the common magnetic conductive plate 2132 along a vibration direction perpendicular to the bass diaphragm 311 overlaps with a projection of the first bass voice coil 312 and the second bass voice coil 313 along a vibration direction perpendicular to the bass diaphragm 311 .

[0165] It can be understood that such a configuration makes the magnetic flux lines of the first common magnet 2131 and the second common magnet 2133 of the common magnetic part 213 gather on the common magnetic conductive plate 2132, and pass through the first bass magnetic gap 215 and the second bass magnetic gap 216, thereby increasing the density of the magnetic flux of the first bass magnetic gap 215 and the second bass magnetic gap 216, so that the first bass voice coil 312 and the second bass voice coil 313 are in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100. Optionally, the projection of the common magnetic conductive plate 2132 in the horizontal direction is located in the projection of the first bass voice coil 312 and the second bass voice coil 313 in the horizontal direction.

[0166] Optionally, the thickness of the common magnetic conductive plate 2132 is less than or equal to the thickness of the first common magnet 2131 , and the thickness of the common magnetic conductive plate 2132 is less than or equal to the thickness of the second common magnet 2133 , which is not limited here.

[0167] In one embodiment, at least a portion of the projection of the central magnetic conductive plate 2122 along the vibration direction perpendicular to the bass diaphragm 311 overlaps with the projection of the first bass voice coil 312 along the vibration direction perpendicular to the bass diaphragm 311 .

[0168] It can be understood that such a configuration makes the magnetic flux lines of the first central magnet 2121 and the second central magnet 2123 of the central magnetic part 212 gather on the central magnetic plate 2122 and pass through the first bass magnetic gap 215, thereby increasing the density of the magnetic flux of the first bass magnetic gap 215, so that the first bass voice coil 312 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound device 100 and improve the sound quality of the audio output by the sound device 100. Optionally, the projection of the central magnetic plate 2122 in the horizontal direction is located in the projection of the first bass voice coil 312 in the horizontal direction.

[0169] Optionally, the thickness of the central magnetic conductive plate 2122 is less than or equal to the thickness of the first central magnet 2121, and the thickness of the central magnetic conductive plate 2122 is less than or equal to the thickness of the second central magnet 2123, which is not limited here. In this embodiment, the thickness of the central magnetic conductive plate 2122 can be equivalent to the thickness of the common magnetic conductive plate 2132.

[0170] In this embodiment, if Figure 2 As shown, the thickness of the first central magnet 2121 along the vibration direction of the bass diaphragm 311 may be the same as the thickness of the first common magnet 2131 along the vibration direction of the bass diaphragm 311. Optionally, the thickness of the central magnetic plate 2122 along the vibration direction of the bass diaphragm 311 may be the same as the thickness of the side magnetic plate 2142 along the vibration direction of the bass diaphragm 311.

[0171] In one embodiment, the thickness of the second central magnet 2123 along the vibration direction of the bass diaphragm 311 is greater than or equal to the thickness of the second common magnet 2133 along the vibration direction of the bass diaphragm 311. That is, the side surface of the second central magnet 2123 facing away from the central magnetic plate 2122 protrudes from the side surface of the second common magnet 2133 facing away from the common magnetic plate 2132 to form a protrusion 2124. That is, the thickness of the central magnetic part 22 is greater than the thickness of the common magnetic part 23. In this way, under the limited reserved space, the size of the bass magnetic circuit part 21 can be maximized, and at the same time, the vibration area of ​​the diaphragm 31 is taken into account to ensure the sound performance of the sound-generating device 100.

[0172] It can be understood that the bass vibration unit 31 of the vibration system 3 is provided with a through structure for the protrusion to pass through. When the sound-generating device 100 is applied to an electronic device, in order to reduce the Z-direction height of the electronic device, the protrusion 2124 of the magnetic circuit system 2 in the sound-generating device 100 can be used to abut against the inner wall of the shell of the electronic device. There is no need to increase the front cavity space additionally. The front sound cavity structure can be formed by utilizing the height difference between the protrusion 2124 of the magnetic circuit system 2 and the bass vibration unit 31 of the vibration system 3. No limitation is made here.

[0173] Of course, in other implementations, the thickness of the second central magnet 2123 along the moving direction of the first bass voice coil 312 may be the same as the thickness of the second common magnet 2133 along the moving direction of the first bass voice coil 312. The bass diaphragm 311 of the bass vibration unit 31 is opposite to and spaced from the central magnetic part 212; or, the bass diaphragm 311 of the bass vibration unit 31 is connected and sealed to the central magnetic part 212, which is not limited here.

[0174] In one embodiment, the size of the sound device 100 along the vibration direction of the bass vibration unit 31 is smaller than the size of the sound device 100 along the vibration direction of the tweeter diaphragm unit 32. It can be understood that such a configuration makes the sound device 100 have a flat structure, which facilitates the thin design of the application end when adapted to the application end, thereby improving the user experience.

[0175] In one embodiment, the sound-emitting device 100 is installed in the shell 400 of the sound-emitting module 500, and forms a bass front cavity 421, a treble front cavity 422 and a rear cavity 430 which are isolated from each other between the shell 400. The shell 400 is provided with a bass sound outlet 411 connected to the bass front cavity 421 and a treble sound outlet 412 connected to the treble front cavity 422. The sound waves of the bass diaphragm 311 are radiated to the outside through the bass sound outlet 411, and the sound waves of the treble radiation surface 323 are radiated to the outside through the treble sound outlet 412; wherein, the volume of the rear cavity 430 is ≤1.5cc.

[0176] In this embodiment, if Figures 8 to 11 As shown, the housing 400 of the sound module 500 has an installation space, and the sound device 100 is arranged in the installation space of the housing 400, and forms a front cavity and a rear cavity 430 separated from the housing 400. It can be understood that in order to avoid mutual interference between the sound of the bass vibration unit 31 of the sound device 100 and the sound of the treble vibration unit 32, the front cavity formed by the sound device 100 and the housing 400 includes a bass front cavity 421 and a treble front cavity 422.

[0177] In one embodiment, if Figures 9 to 11As shown, the housing 400 is further provided with a treble sound guide 413, which is arranged corresponding to the treble vibration unit 32 of the sound-generating device 100 and encloses a treble front cavity 422. It can be understood that the bass vibration unit 31 of the sound-generating device 100 and the housing 400 enclose a bass front cavity 421.

[0178] In order to facilitate the smooth transmission of the sounds generated by the bass diaphragm 311 and the tweeter diaphragm 321 of the sound-generating device 100 to the outside, the shell 400 is provided with a bass sound outlet hole 411 connected to the bass front cavity 421 and a tweeter sound outlet hole 412 connected to the tweeter front cavity 422, so that the sound waves of the bass diaphragm 311 are radiated to the outside through the bass sound outlet hole 411, and the sound waves of the tweeter diaphragm 321 are radiated to the outside through the tweeter sound outlet hole 412.

[0179] It can be understood that the bass sound outlet 411 and the treble sound outlet 412 can be arranged on different sides of the housing 400 to achieve different sound effects. Figure 8 and Fig. 9 As shown, the bass sound outlet 411 and the treble sound outlet 412 are optionally located on the same side of the housing 400 and are arranged at intervals. Optionally, the bass sound outlet 411 includes multiple bass sound outlets, and the multiple bass sound outlets 411 are located on opposite sides or peripheries of the treble sound outlet 412, which is not limited here.

[0180] It is understandable that in order to balance the air pressure inside the sound-generating device 100, the sound-generating device 100 is also provided with a pressure relief hole, so that when the bass diaphragm 311 vibrates, the sound waves on the side of the bass diaphragm 311 facing away from the bass front cavity 421 are radiated to the rear cavity 430 through the pressure relief hole, thereby balancing the air pressure on both sides of the bass diaphragm 311. Optionally, the pressure relief hole is provided on the housing 1 of the sound-generating device 100; or, the pressure relief hole is provided on the magnetic yoke 211 of the magnetic circuit system 2 of the sound-generating device 100, which is not limited here. In this embodiment, the pressure relief hole is optionally provided on the first magnetic yoke 2111 of the magnetic yoke 211 of the magnetic circuit system 2.

[0181] Of course, in order to balance the air pressure on the two sides of the tweeter diaphragm 321 of the sound-emitting device 100, the sound-emitting device 100 is also provided with a pressure relief hole, which connects the rear cavity 430 with the space between the tweeter magnetic circuit part 22 and the tweeter vibration unit 32. In this way, when the tweeter diaphragm 321 vibrates, the sound waves on the side of the tweeter diaphragm 321 facing away from the tweeter front cavity 422 are radiated to the rear cavity 430 through the pressure relief hole, thereby balancing the air pressure on both sides of the tweeter diaphragm 321.

[0182] In this embodiment, the sound device 100 is installed in the housing 400 of the sound module 500, and the volume of the rear cavity 430 is optionally less than or equal to 1.5cc. Optionally, the volume of the rear cavity 430 is 1.5cc, 1.4cc, 1.3cc, 1.2cc, 1.1cc, 1cc, 0.9cc, 0.8cc, 0.7cc, 0.6cc, 0.5cc, 0.4cc, 0.3cc, 0.2cc, 0.1cc, etc., which is not limited here.

[0183] It can be understood that by setting the magnetic circuit system 2 of the sound-generating device 100 to a bass magnetic circuit part 21 and a treble magnetic circuit part 22, and setting the bass magnetic circuit part 21 to a magnetic yoke 211 and a central magnetic part 212, a common magnetic part 213 and a side magnetic part 214 arranged on the magnetic yoke, so that the central magnetic part 212 and the side magnetic part 214 share the common magnetic part 213, respectively forming a first bass magnetic gap 215 and a second bass magnetic gap 216, and setting the bass vibration unit 31 of the vibration system 3 to an inner and outer double voice coil structure, so that the first bass voice coil 312 is arranged corresponding to the first bass magnetic gap 215, and the second bass magnetic gap 216 is formed. The coil 313 is arranged corresponding to the second bass magnetic gap 216, so that current is passed through the first bass voice coil 312 and the second bass voice coil 313, so that the two voice coils vibrate in the magnetic fields of the first bass magnetic gap 215 and the second bass magnetic gap 216 formed by the bass magnetic circuit part 21 respectively, and drive the bass diaphragm 311 to vibrate and make sound, so as to improve the BL value. At the same time, the first bass voice coil 312 and the second bass voice coil 313 can make full use of the magnetic fields of the central magnetic part 212 and the common magnetic part 213, improve the magnetic energy utilization rate of the magnetic circuit system 2, thereby improving the loudness and sensitivity of the sound-generating device 100, so as to improve product performance.

[0184] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device 100. The specific structure of the sound-generating device 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0185] In one embodiment, the electronic device further includes a device housing, the device housing has an installation space, and the sound device 100 is disposed in the installation space of the device housing. Of course, in other embodiments, the electronic device may include a sound module 500, which is not limited here.

[0186] In this embodiment, the electronic device further includes a flexible circuit board, one end of which is electrically connected to the sound-generating device 100, and the other end of which is used to connect to an external power source. It can be understood that the flexible circuit board is used to connect the external circuit to the first bass voice coil 312, the second bass voice coil 313, and the treble voice coil 322 of the sound-generating device 100. The flexible circuit board is provided with an inner pad and an outer pad, the inner pad of the flexible circuit board is connected to the sound-generating device 100, and the outer pad of the flexible circuit board is used to connect to an external terminal.

[0187] In this embodiment, the device housing has an installation space, the sound device 100 is disposed in the installation space of the device housing, and at least one end of the flexible circuit board connected to the sound device 100 is located in the installation space of the device housing. Of course, in other embodiments, the flexible circuit board can also be entirely disposed in the installation space of the device housing, which is not limited here.

[0188] It is understandable that the electronic device can be headphones, mobile phones, MP3, MP4, computers, tablet computers, smart wearable devices, etc., which are not limited here. In the electronic device, the sound device 100 can be assembled into the housing of the electronic device in the form of a module, or it can be assembled into the housing of the electronic device in the form of a single body.

[0189] The above descriptions are only optional 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-generating device, characterized in that: The sound-generating device comprises: shell; a magnetic circuit system connected to the housing, the magnetic circuit system comprising a bass magnetic circuit portion and a treble magnetic circuit portion, the bass magnetic circuit portion comprising a magnetic yoke and a central magnetic portion, a common magnetic portion and a side magnetic portion arranged on the magnetic yoke, the common magnetic portion being located outside the central magnetic portion and spaced from the central magnetic portion to form a first bass magnetic gap, the side magnetic portion being located outside the common magnetic portion and spaced from the common magnetic portion to form a second bass magnetic gap; and A vibration system, the vibration system comprising a bass vibration unit and a treble vibration unit, the bass vibration unit comprising a bass diaphragm and a first bass voice coil and a second bass voice coil connected to the bass diaphragm, an inner ring hole is provided at the center of the bass diaphragm, the outer periphery of the bass diaphragm is connected to the housing, the inner periphery of the bass diaphragm is connected to the bass magnetic circuit part, the first bass voice coil is arranged corresponding to the first bass magnetic gap, the second bass voice coil is arranged corresponding to the second bass magnetic gap, the treble vibration unit is connected to the housing, and is arranged opposite to and spaced from the treble magnetic circuit part; Among them, the central magnetic part includes a first central magnet, a central magnetic conductive plate and a second central magnet which are stacked, and the common magnetic part includes a first common magnet, a common magnetic conductive plate and a second common magnet which are stacked. The first central magnet, the central magnetic conductive plate and the second central magnet respectively correspond to the first common magnet, the common magnetic conductive plate and the second common magnet in a vibration direction perpendicular to the vibration system, and the thickness of the second central magnet along the vibration direction of the vibration system is greater than the thickness of the second common magnet along the vibration direction of the vibration system, and the top surface height of the bass diaphragm is lower than the top surface height of the bass magnetic circuit part.

2. The sound generating device according to claim 1, characterized in that: The tweeter magnetic circuit portion is located on the side of the side magnetic circuit, the bass vibration unit has a bass radiation surface, the tweeter vibration unit has a tweeter radiation surface, and the bass radiation surface is arranged at an angle to the tweeter radiation surface.

3. The sound-generating device according to claim 2, characterized in that: The housing comprises a frame body and a mounting side wall, wherein the mounting side wall is arranged at one side of the frame body and encloses an mounting space with an outer wall of the frame body, and the mounting side wall is provided with a mounting hole communicating with the mounting space; The periphery of the bass diaphragm is connected to one end of the frame body, the side magnet portion is connected to the other end of the frame body, the tweeter magnetic circuit portion is arranged in the installation space and corresponds to the installation hole, and the tweeter vibration unit is connected to the installation side wall and covers the installation hole.

4. The sound-generating device according to claim 3, characterized in that: The tweeter magnetic circuit part includes a first magnet, a second magnet and a third magnet arranged in the installation space, the first magnet, the second magnet and the third magnet are stacked in a direction parallel to the tweeter radiation surface, the first magnet is adjacent to the magnetic yoke, and the third magnet is connected to the frame body; The tweeter vibration unit includes a tweeter diaphragm and a tweeter voice coil connected to the tweeter diaphragm, the tweeter diaphragm is connected to the mounting side wall and covers the mounting hole, the tweeter voice coil is located in the mounting hole and is opposite to and spaced apart from the tweeter magnetic circuit part.

5. The sound generating device according to claim 4, characterized in that: The first magnet, the second magnet and the third magnet are all magnetized in a direction perpendicular to the tweeter radiation surface, and the magnetization direction of the second magnet is opposite to the magnetization direction of the first magnet and the third magnet; Or, the second magnet is magnetized in a direction perpendicular to the tweeter radiation surface, the first magnet and the third magnet are magnetized in a direction parallel to the tweeter radiation surface, and the magnetization direction of the first magnet is opposite to the magnetization direction of the third magnet, and the magnetic pole of the first magnet close to the second magnet is the same as the magnetic pole of the second magnet close to the tweeter radiation surface; And / or, the tweeter diaphragm is a planar diaphragm, and the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy; And / or, the tweeter voice coil is fixed to a side of the tweeter diaphragm facing the tweeter magnetic circuit portion, the tweeter voice coil is a flat voice coil formed by winding an enameled wire, and the central axis of the flat voice coil is perpendicular to the tweeter radiation surface; or, the tweeter voice coil includes a coil structure formed by a circuit board and a conductive circuit arranged on the circuit board; And / or, the tweeter diaphragm is a planar diaphragm, and a reinforcement portion is provided in a central area of ​​the tweeter diaphragm.

6. The sound generating device according to claim 1, characterized in that: The first central magnet and the second central magnet are both magnetized along the vibration direction of the bass diaphragm, and the magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are the same; The first common magnet and the second common magnet are both magnetized along the vibration direction of the bass diaphragm, and the magnetic poles of the first common magnet and the second common magnet close to the common magnetic conductive plate are the same, and the side magnets are magnetized along the vibration direction of the bass diaphragm; The magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are opposite to the magnetic poles of the first common magnet and the second common magnet close to the common magnetic conductive plate; The edge magnetic part includes stacked edge magnets and edge magnetic conductive plates, the edge magnetic conductive plates are connected to the outer shell, the magnetic poles of the edge magnets close to the edge magnetic conductive plates are the same as the magnetic poles of the first center magnets close to the center magnetic conductive plates, and the magnetic poles of the edge magnets close to the edge magnetic conductive plates are opposite to the magnetic poles of the first common magnets close to the common magnetic conductive plates.

7. The sound generating device according to claim 1, characterized in that: The side magnetic part includes a stacked side magnet and a side magnetic conductive plate, the side magnetic conductive plate is connected to the housing, the magnetic conductive yoke includes a first magnetic yoke and a second magnetic yoke, the first center magnet, the first common magnet and the side magnet are connected to the first magnetic yoke, and the second center magnet and the second common magnet are connected to the second magnetic yoke; The second magnetic yoke includes a protruding portion and a border portion connected to the edge of the protruding portion, the protruding portion passes through the inner ring hole and forms a recessed groove facing the central magnetic portion, the second central magnet has a protruding portion protruding from the second common magnet, the protruding portion is accommodated and confined in the recessed groove, and the inner periphery of the bass diaphragm is connected to the border portion.

8. The sound generating device according to claim 7, characterized in that: The bass diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the inner ring portion forms the inner ring hole, and the inner ring portion is connected to the edge portion.

9. The sound-generating device according to claim 8, characterized in that: The inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure; And / or, the top surface height of the side magnetic portion is lower than the top surface height of the common magnetic portion, the protrusion direction of the first fold ring is toward the direction away from the bass magnetic circuit portion, the protrusion direction of the second fold ring is opposite to the protrusion direction of the first fold ring, the first fold ring is at least partially opposite to the second magnetic gap, and the second fold ring is at least partially opposite to the side magnetic circuit portion; And / or, a avoidance structure is provided at the periphery of the second common magnet adjacent to the second bass magnetic gap.

10. The sound generating device according to any one of claims 1 to 9, characterized in that: The common magnetic part is provided with an avoidance gap connecting the first bass magnetic gap and the second bass magnetic gap; The bass vibration unit also includes a frame, which includes a main body and a connecting part connected to the main body, the main body is connected to the bass diaphragm, the connecting part is located in the avoidance gap, and two ends of the connecting part are respectively connected to the first bass voice coil and the second bass voice coil.

11. The sound generating device according to claim 10, characterized in that: An escape space is formed between the edge magnetic portion and the shell; The bass vibration unit further includes a centering support plate, one end of which is connected to the housing, and the other end of which is located in the avoidance space; The frame further includes an extension portion, one end of which is connected to the periphery of the main body portion, and the other end of which extends toward the centering support piece and is connected to the centering support piece.

12. The sound generating device according to claim 11, characterized in that: The main body is arranged in a rectangular ring, the connecting parts include a plurality of connecting parts, the plurality of connecting parts are arranged corresponding to the four corners of the main body respectively, and the common magnetic part is provided with an avoidance notch corresponding to each connecting part; And / or, two ends of the connecting portion are respectively provided with a first connecting surface and a second connecting surface, the first connecting surface is connected to the first bass voice coil, and the second connecting surface is connected to the second bass voice coil; And / or, the shell has two long sides and two short sides connected end to end, the centering support plates include two, the two centering support plates are symmetrically arranged and respectively correspond to the two short sides, and the tweeter magnetic circuit part and the tweeter vibration unit are arranged corresponding to the long sides.

13. The sound generating device according to any one of claims 1 to 9, characterized in that: The size of the sound generating device along the vibration direction of the bass vibration unit is smaller than the size of the sound generating device along the vibration direction of the treble vibration unit.

14. The sound generating device according to any one of claims 1 to 9, characterized in that: The sound-generating device is installed in the shell of the sound-generating module, and forms a bass front cavity, a treble front cavity and a rear cavity which are isolated from each other with the shell. The shell is provided with a bass sound outlet hole connected to the bass front cavity and a treble sound outlet hole connected to the treble front cavity. The sound waves of the bass diaphragm are radiated to the outside through the bass sound outlet hole, and the sound waves of the treble radiation surface are radiated to the outside through the treble sound outlet hole; wherein the volume of the rear cavity is ≤1.5cc.

15. An electronic device, characterized in that: The electronic device comprises the sound emitting device according to any one of claims 1 to 14.

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