Sound production device and electronic equipment

Abstract

The invention provides a sound production device and electronic equipment, the sound production device comprises a magnetic circuit system, the magnetic circuit system comprises a magnetic conductive yoke, a central magnetic circuit and an edge magnetic circuit, the edge magnetic circuit and the central magnetic circuit enclose to form a magnetic gap, the central magnetic circuit comprises a first magnetic group, a second magnetic group and a third magnetic group, the second magnetic group is clamped between the first magnetic group and the third magnetic group, and the third magnetic group is clamped between the first magnetic group and the third magnetic group; a Halbach magnetic circuit is formed; mounting holes are formed in the first magnetic group, the second magnetic group and the third magnetic group; the vibration system comprises a diaphragm assembly and a voice coil, one end of the voice coil is connected with the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap; the conductive support is arranged in the mounting hole and fixed on the magnetic conductive yoke, one end of the conductive support is attached to the conductive vibrating diaphragm and electrically connected with the conductive vibrating diaphragm, and the other end of the conductive support is electrically connected with an external circuit. According to the invention, the problem of poor product performance caused by the fact that the BL value is not increased due to the limitation of the spatial size of the existing sound production device can be solved.

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] At present, the box space in electronic devices is getting smaller and smaller. The BL value of the sound-generating device is limited by the space size, resulting in a small number of magnetic lines passing through the voice coil, which leads to a smaller magnetic field force on the voice coil, low sensitivity of the sound-generating device, and poor overall acoustic performance and sound effects. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a sound-generating device and an electronic device to solve the problem that the BL value of the existing sound-generating device does not increase due to space size limitations, resulting in poor product performance.

[0005] The present invention provides a sound-generating device, comprising:

[0006] A magnetic circuit system, comprising a magnetic yoke, a central magnetic circuit and a side magnetic circuit arranged on the magnetic yoke, wherein the central magnetic circuit and the side magnetic circuit are located on the same side of the magnetic yoke, the side magnetic circuit is located outside the central magnetic circuit and encloses the central magnetic circuit to form a magnetic gap, the central magnetic circuit comprises a first magnetic group, a second magnetic group and a third magnetic group, the second magnetic group is sandwiched between the first magnetic group and the third magnetic group, and mounting holes are arranged on the first magnetic group, the second magnetic group and the third magnetic group;

[0007] A vibration system, comprising a diaphragm assembly and a voice coil opposite to the magnetic circuit system, wherein the diaphragm assembly comprises a conductive diaphragm, the conductive diaphragm is electrically connected to the lead of the voice coil, one end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap;

[0008] A conductive bracket is arranged in the mounting hole and fixed on the magnetic yoke, one end of the conductive bracket is fitted on the conductive diaphragm and electrically connected to the conductive diaphragm, and the other end of the conductive bracket is electrically connected to an external circuit;

[0009] The first magnetic group and the third magnetic group are magnetized along the vibration direction of the vibration system and in opposite directions, and the magnetization direction of the second magnetic group is perpendicular to the vibration direction of the vibration system, so that the central magnetic circuit forms a Halbach magnetic circuit.

[0010] In addition, a preferred solution is that a diaphragm pad is provided on the periphery of the conductive diaphragm, the diaphragm pad is electrically connected to the lead of the voice coil, and the conductive diaphragm is electrically connected to the voice coil via the diaphragm pad.

[0011] In addition, a preferred solution is that the conductive bracket includes an injection molded bracket, an internal solder pad arranged on the upper end surface of the injection molded bracket, and an external solder pad arranged on the lower end surface of the injection molded bracket, wherein the injection molded bracket passes through the mounting hole and is fixed on the magnetic yoke, the internal solder pad is electrically connected to the middle part of the conductive diaphragm, and the external solder pad is electrically connected to the external circuit.

[0012] In addition, a preferred solution is that the external solder pad is arranged corresponding to the through hole on the magnetic yoke, the external solder pad is welded to the flexible circuit board through the through hole, and the external solder pad is electrically connected to the external circuit through the flexible circuit board.

[0013] In addition, a preferred solution is that the first magnetic group includes at least two first magnets that are symmetrically arranged at intervals, and the interval space formed by the two first magnets forms the mounting hole for mounting.

[0014] In addition, a preferred solution is that the second magnetic circuit and the third magnetic circuit are both arranged in an annular shape, the second magnetic circuit includes at least two second magnets connected in sequence, and the second magnets are annularly enclosed to form the mounting hole;

[0015] The third magnetic circuit includes a third magnet provided as an integral structure, and a mounting hole is provided at the center of the third magnet;

[0016] The conductive brackets respectively penetrate the mounting holes of the first magnetic circuit, the second magnetic circuit, and the third magnetic circuit and are fixed on the magnetic yoke.

[0017] In addition, a preferred solution is that the magnetization direction of the first magnetic group is opposite to the magnetization direction of the third magnetic group;

[0018] The second magnetic group is magnetized along a vibration direction perpendicular to the vibration system, and the magnetization direction of the second magnetic group is from the periphery of the second magnetic group to the center of the second magnetic group.

[0019] In addition, a preferred solution is that the side magnetic circuit includes stacked side magnets and side magnetic conductive plates, and the side magnets are fixed on the magnetic conductive yoke; wherein the first magnetic group, the third magnetic group and the side magnets are all magnetized along the vibration direction of the vibration system, the magnetizing direction of the first magnetic group is the same as the magnetizing direction of the side magnets, and the magnetizing direction of the third magnetic group is opposite to the magnetizing direction of the side magnets.

[0020] In addition, a preferred solution is that the diaphragm assembly further includes a reinforcement portion connected to the outer edge of the conductive diaphragm and an outer folding ring connected to the outer edge of the reinforcement portion.

[0021] The middle part of the reinforcement part is a hollow hole, the conductive diaphragm cover is arranged in the hollow hole and is sealed and connected to the central magnetic circuit; or,

[0022] The diaphragm assembly also includes an outer folding ring and a reinforcement portion connected to the edge of the conductive diaphragm, the conductive diaphragm and the outer folding ring are an integrally formed structure, the reinforcement portion is connected to the integrally formed connection between the conductive diaphragm and the outer folding ring, the middle portion of the reinforcement portion is a hollow hole, the conductive diaphragm cover is arranged in the hollow hole and is sealed and connected to the central magnetic circuit.

[0023] In addition, a preferred solution is to further include a skeleton, one side of the skeleton is connected to the reinforcement part, and the other side of the skeleton is connected to the voice coil, so that the voice coil is suspended in the magnetic gap.

[0024] The present invention also provides an electronic device, comprising the above-mentioned sound-generating device.

[0025] It can be seen from the above technical solutions that the sound-emitting device and electronic device provided by the present invention can effectively improve the magnetic field strength, increase the density of the magnetic flux in the magnetic gap, increase the number of magnetic lines of force passing through the voice coil, increase the magnetic field force on the voice coil, effectively improve the BL value, improve the sensitivity of the sound-emitting device, effectively improve the flatness of the BL curve, significantly improve the FR frequency response curve, and effectively reduce the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved; by arranging a conductive bracket in the Halbach magnetic circuit, the conductive bracket is fitted and connected to the conductive diaphragm, the conductive diaphragm is electrically connected to the voice coil, and the voice coil is electrically connected to the external circuit through the conductive bracket and the conductive diaphragm; in addition, the conductive diaphragm is sealed and connected to the Halbach magnetic circuit, thereby improving the polarization problem of the speaker.

[0026] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0028] Figure 1is an exploded view of a sound-generating device according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a conductive bracket structure according to an embodiment of the present invention;

[0030] Figure 3 is a schematic cross-sectional structure diagram of a sound-generating device according to an embodiment of the present invention;

[0031] Figure 4 is a partial cross-sectional structural schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the positions of a conductive diaphragm and a conductive pad according to an embodiment of the present invention;

[0033] Figure 6 is a top view of a sound-generating device according to an embodiment of the present invention;

[0034] Figure 7 Schematic diagram of magnetization of a sound-generating device according to an embodiment of the present invention.

[0035] The accompanying drawings include: 1. conductive diaphragm, 2. reinforcement part, 3. outer folding ring, 4. skeleton, 5. voice coil, 6. metal shell, 8. conductive bracket, 81. first internal welding pad, 82. second internal welding pad, 83. first external welding pad, 84. second external welding pad, 91. center magnetic circuit, 911. first magnetic group, 912. second magnetic group, 913. third magnetic group, 92. side magnetic circuit, 921. side magnetic plate, 922. side magnet, 93. mounting hole, 10. magnetic yoke, 101. first through hole, 102. second through hole, 11. magnetic gap, 12. flexible circuit board, 13. diaphragm welding pad.

[0036] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0037] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In order to solve the problem that the BL value of the existing sound-generating device does not increase due to space size limitation, resulting in poor product performance, the present invention proposes a sound-generating device and an electronic device.

[0040] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] In order to illustrate the structure of the sound generating device provided by the present invention, Figures 1 to 7 The structure of the sound-generating device is exemplarily indicated from different angles. Specifically, Figure 1 The explosion structure of the sound generating device according to an embodiment of the present invention is shown; Figure 2 A conductive support structure according to an embodiment of the present invention is shown; Figure 3 The cross-sectional structure of the sound-generating device according to the embodiment of the present invention is shown; Figure 4 shows a partial cross-sectional structure of a sound-generating device according to an embodiment of the present invention; Figure 5 The positions of the conductive diaphragm and the conductive pad according to the embodiment of the present invention; Figure 6 The top view structure of the sound-generating device according to an embodiment of the present invention is shown; Figure 7 The magnetization of the sound-generating device according to the embodiment of the present invention is shown.

[0042] like Figures 1 to 7As shown together, the sound-generating device provided by the present invention includes a magnetic circuit system, a vibration system and a conductive bracket 8. The magnetic circuit system includes a magnetic yoke 10, a central magnetic circuit 91 and a side magnetic circuit 92 arranged on the magnetic yoke 10, wherein the central magnetic circuit 91 and the side magnetic circuit 92 are located on the same side of the magnetic yoke 10, and the side magnetic circuit 92 is located on the outside of the central magnetic circuit 91 and encloses the central magnetic circuit 91 to form a magnetic gap 11, and the central magnetic circuit 91 includes a first magnetic group 911, a second magnetic group 912 and a third magnetic group 913, wherein the second magnetic group 912 is sandwiched between the first magnetic group 911 and the third magnetic group 913, and mounting holes 93 are arranged on the first magnetic group 911, the second magnetic group 912 and the third magnetic group 913; the vibration system includes a diaphragm assembly and a voice coil 5 opposite to the magnetic circuit system, and the diaphragm assembly The component includes a conductive diaphragm 1, which is electrically connected to the lead of the voice coil 5, one end of the voice coil 5 is connected to the diaphragm assembly, and the other end of the voice coil 5 is suspended in the magnetic gap 11; a conductive bracket 8 is arranged in the mounting hole 93 and fixed on the magnetic yoke 10, one end of the conductive bracket 8 is fitted on the conductive diaphragm 1 and electrically connected to the conductive diaphragm 1, and the other end of the conductive bracket 8 is electrically connected to an external circuit; wherein, the first magnetic group 911 and the third magnetic group 913 are magnetized along the vibration direction of the vibration system and in opposite directions, and the magnetization direction of the second magnetic group 912 is perpendicular to the vibration direction of the vibration system, so that the central magnetic circuit 91 forms a Halbach magnetic circuit.

[0043] In an embodiment of the present invention, the sound-generating device may be a sound-generating unit of a loudspeaker, and the loudspeaker may be a miniature loudspeaker. It should be noted that the magnetic circuit system and the vibration system of the sound-generating device are arranged relative to each other. Optionally, the magnetic circuit system is arranged in a square shape. For example, the magnetic circuit system may include a central magnetic circuit 91 and a side magnetic circuit 92, both of which are square structures. The vibration system is also arranged in a square shape. It is understandable that the periphery of the diaphragm assembly of the vibration system may be connected to the magnetic circuit system, or the magnetic circuit system and the vibration system may be separately assembled on the module housing, etc., which are not limited here.

[0044] In order to better assemble the magnetic circuit system and vibration system of the sound device, Figures 1 to 7In the illustrated embodiment, the sound-generating device further comprises an outer metal shell 6, the magnetic circuit system is connected to one end of the metal shell 6, the vibration system is connected to the other end of the metal shell 6 and is arranged opposite to the magnetic circuit system, that is, the periphery of the diaphragm assembly of the vibration system is connected to the other end of the metal shell 6 and is arranged opposite to the magnetic circuit system. In the present embodiment, the metal shell 6 is used to install, fix and support components such as the magnetic circuit system and the vibration system, that is, the metal shell 6 provides an installation basis for components such as the magnetic circuit system and the vibration system. It can be understood that the metal shell 6 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The metal shell 6 in the present embodiment can be selected as a square frame or frame structure, that is, the metal shell 6 has a cavity with openings at both ends, and the magnetic circuit system and the vibration system are respectively connected to the two sides of the metal shell 6, so that the magnetic circuit system, the shell and the diaphragm assembly of the vibration system enclose to form a vibration cavity.

[0045] Among them, the sound-generating device is applied to electronic equipment, that is, the sound-generating device can be installed in the electronic equipment through a metal shell. It should be noted that the metal shell 6 of the sound-generating device can be a shell or box structure independent of the electronic equipment. In this case, the metal shell 6 is used to integrate the magnetic circuit system and the vibration system and other components of the sound-generating device into an integral structure, so as to facilitate disassembly and assembly. Of course, the metal shell 6 of the sound-generating device can also be an integrally formed structure with the shell or box structure of the electronic equipment, which can effectively improve the structural strength and sealing performance.

[0046] In this embodiment, the metal shell 6 is used to accommodate and fix the vibration system and the magnetic circuit system and other structures, so that the sound-generating device can be used as an independent component in an electronic device or a sound module, which is not limited here. Of course, in other embodiments, the sound-generating device can also be a module structure, in which case the vibration system and the magnetic circuit system of the sound-generating unit are installed as multiple independent components on the metal shell 6 of the module structure, which is not limited here.

[0047] It can be understood that by setting the magnetic circuit system as the magnetic yoke 10 and the central magnetic circuit 91 and the side magnetic circuit 92 provided on the magnetic yoke 10, the magnetic circuit system can be connected to the metal shell through the periphery of the magnetic yoke 10; or, the magnetic circuit system can be connected to the shell through the side magnetic circuit 92, which is not limited here. In this embodiment, the side magnetic circuit 92 is located outside the central magnetic circuit 91 and is enclosed with the central magnetic circuit 91 to form a magnetic gap 11, so that the diaphragm assembly of the vibration system is connected to the end of the shell away from the magnetic yoke 10, and is opposite to and spaced from the magnetic circuit system, so that one end of the voice coil 5 is connected to the diaphragm assembly, and the other end of the voice coil 5 is suspended in the magnetic gap 11.

[0048] In order to realize the electrical connection between the voice coil 5 and the external circuit. Figures 1 to 7As shown, by providing a mounting hole 93 passing through the central magnetic part 91 and a through hole passing through the magnetic yoke 10 in the magnetic circuit system, and arranging a conductive bracket 8 in the mounting hole 93, the diaphragm assembly includes a conductive diaphragm 1, and the conductive diaphragm 1 is electrically connected to the lead of the voice coil 5 through the diaphragm welding pad 13, and the conductive bracket 8 is attached to the conductive diaphragm 1 and electrically connected thereto, so that the external current is introduced into the voice coil 5 through the conductive bracket 8, and the conductive bracket 8 is located in the middle position and is electrically connected to the conductive diaphragm 1. The side magnetic circuit 92 does not need to be provided with a structure to avoid the lead of the voice coil 5, and the side magnetic circuit 92 has stronger performance, so as to improve the sound effect and acoustic performance of the sound-generating device.

[0049] Optionally, the mounting hole 25 may be a polygonal hole or a special-shaped hole such as a circular hole, an elliptical hole, a square hole, a triangular hole, etc., and may be selected and set according to actual needs and is not limited here.

[0050] In an embodiment of the present invention, the first magnetic group 911 includes at least two first magnets symmetrically arranged at intervals, and the interval space formed by the two magnets forms the mounting hole 93 for mounting the conductive bracket. The second magnetic circuit 912 and the third magnetic circuit 913 are both arranged in an annular shape, and the second magnetic circuit 912 includes at least two second magnets connected in sequence, and the second magnets are surrounded in an annular shape to form the mounting hole 93; the third magnetic circuit 913 includes a third magnet arranged in an integral structure, and a mounting hole 93 for mounting the conductive bracket is arranged at the center of the third magnet; the conductive bracket 8 passes through the mounting holes 93 of the first magnetic circuit, the second magnetic circuit, and the third magnetic circuit respectively and is fixed on the magnetic yoke 10.

[0051] In the embodiment of the present invention, by setting the central magnetic circuit 91 as the first magnetic group 911, the second magnetic group 912 and the third magnetic group 913 stacked on the magnetic yoke 10, the first magnetic group 911 and the third magnetic group 913 of the central magnetic circuit 91 are magnetized along the vibration direction of the vibration system, and the magnetizing direction of the second magnetic group 912 is perpendicular to the magnetizing directions of the first magnetic group 911 and the third magnetic group 913, that is, magnetized in a direction perpendicular to the vibration direction of the vibration system, so that the central magnetic circuit 91 forms a Halbach magnetic circuit, forming a magnetic field with a higher magnetic field strength, thereby increasing the density of the magnetic flux of the magnetic gap 11, increasing the number of magnetic lines of force passing through the voice coil 5, increasing the magnetic field force on the voice coil 5, effectively improving the BL value, improving the sensitivity of the sound-generating device, and improving the sound effect and performance of the whole machine.

[0052] Optionally, the vibration direction of the vibration system in this embodiment can be selected as the vertical direction, and the first magnetic group 911 and the third magnetic group 913 of the central magnetic circuit 91 are magnetized in the vertical direction. It can be understood that the magnetization direction of the second magnetic group 9122 is perpendicular to the magnetization directions of the first magnetic group 911 and the third magnetic group 913, that is, the second magnetic group 9122 is magnetized in the horizontal direction. It should be noted that Figure 7 The direction of the arrow in the magnetic circuit system indicates the magnetization direction.

[0053] It can be understood that the central magnetic circuit 91 forms a Halbach magnetic array, which can generate a strong magnetic field. The magnetic field generated by the Halbach magnetic array drives the voice coil 5 to drive the diaphragm assembly to vibrate and produce sound, so that there is a strong magnetic field at the voice coil 5, which is beneficial to improve the sensitivity of controlling the diaphragm vibration; and the Halbach magnetic array allows the magnetic flux lines at the voice coil 5 to be evenly distributed and the magnetic field changes in the vibration direction of the diaphragm assembly have good linearity, which can effectively improve the sound quality of the audio output by the sound-emitting device, enhance the treble effect, and alleviate the distortion of the audio output by the sound-emitting device to a certain extent.

[0054] exist Figure 7 In the illustrated embodiment, the magnetizing direction of the first magnetic group 911 is opposite to that of the third magnetic group 913, and the second magnetic group 912 is magnetized along a vibration direction perpendicular to the vibration system and in an opposite direction, and the magnetizing direction of the second magnetic group 912 is along the periphery of the second magnetic group 912 toward the center of the second magnetic group 912, and the polarity of the outer side of the second magnetic group 912 is the same as the polarity of the first magnetic group 911 close to one end of the second magnetic group 912, so that the magnetic flux lines of the first magnetic group 911 and the third magnetic group 913 are gathered in the second magnetic group 912, and a magnetic field with a strong magnetic field strength is generated by the central magnetic circuit to pass through the magnetic gap 11, thereby increasing the density of the magnetic flux of the magnetic gap 11, increasing the number of magnetic flux lines passing through the voice coil 5, increasing the magnetic field force on the voice coil 5, and effectively improving the BL value.

[0055] In an embodiment of the present invention, the side magnetic circuit 92 includes a stacked side magnet 922 and a side magnetic conductive plate 921, and the side magnet 92 is fixed on the magnetic conductive yoke 10; wherein the first magnetic group 911, the third magnetic group 913 and the side magnet 922 are all magnetized along the vibration direction of the vibration system, the magnetizing direction of the first magnetic group 911 is the same as the magnetizing direction of the side magnet 922, and the magnetizing direction of the third magnetic group 913 is opposite to the magnetizing direction of the side magnet 922.

[0056] exist Figure 3 and Figure 4 In the illustrated embodiment, the side magnets 922 and the side magnetic plates 921 of the side magnetic circuit 92 are stacked on the magnetic yoke 10, and the side magnets 922 are connected to the magnetic yoke 10. The side magnets 922 and the side magnetic plates 921 are located outside the central magnetic circuit 91 and are spaced to form a magnetic gap 11.

[0057] Optionally, the side magnetic circuit 92 is annularly arranged, and the annular side magnetic circuit 92 is located outside the central magnetic circuit 91, and is spaced apart from the central magnetic circuit 91 to form a magnetic gap 11. Optionally, the side magnet 922 and / or the side magnetic conductive plate 921 form a closed integral annular structure.

[0058] exist Figure 2 In the illustrated embodiment, the conductive bracket 8 includes an injection molded bracket, an internal solder pad arranged on the upper end surface of the injection molded bracket, and an external solder pad arranged on the lower end surface of the injection molded bracket, wherein the injection molded bracket passes through the mounting hole 93 and is fixed on the magnetic yoke 10, the internal solder pad is electrically connected to the middle part of the conductive diaphragm 1, and the external solder pad is electrically connected to the external circuit.

[0059] Among them, there are two internal welding pads on the upper end surface of the injection molded bracket, namely the first internal welding pad 81 and the second internal welding pad 82, each of which is welded to the conductive diaphragm 1, and there are two external welding pads on the lower end surface of the injection molded bracket, namely the first external welding pad 83 and the second external welding pad 84; the first external welding pad 83 and the second external welding pad 84 are respectively welded to the flexible circuit board.

[0060] In an embodiment of the present invention, the diaphragm assembly includes a conductive diaphragm 1 arranged corresponding to the central magnetic circuit 91, a reinforcement portion 2 connected to the edge of the conductive diaphragm 1, and an outer folding ring 3 connected to the outer edge of the reinforcement portion 2, the middle portion of the reinforcement portion 2 is a hollow hole, and the conductive diaphragm 1 is covered in the hollow hole and sealedly connected to the central magnetic circuit 91.

[0061] Furthermore, the sound-generating device further comprises a frame 4, one side of the frame 4 is connected to the reinforcement part 2, and the other side of the frame 4 is connected to the voice coil 5, so that the voice coil 5 is suspended in the magnetic gap. The first fold ring 1 and the second fold ring 3 are respectively located on both sides of the reinforcement part 2, and the frame 4 and the second fold ring 3 are located on the same side of the reinforcement part 2.

[0062] In the embodiment of the present invention, both the conductive diaphragm 1 and the outer folding ring 3 are provided with protruding portions. Depending on the specific situation, the bent portion is recessed or protruded toward the side facing the vibration system, which is not specifically limited here.

[0063] In the embodiment of the present invention, the conductive diaphragm 1 has conductivity, and a diaphragm pad 13 is provided on the periphery (which may be a corner) of the conductive diaphragm 1. The conductive diaphragm 1 is electrically connected to the lead of the voice coil 5 through the diaphragm pad 13. In addition, the middle part of the conductive diaphragm 1 is arranged in contact with and electrically connected to the first internal pad 81 and the second internal pad 82 of the conductive bracket 8, and the external pad of the conductive bracket 8 is electrically connected to the external circuit. Therefore, the conductivity of the conductive diaphragm 1 and the conductive bracket 8 realize the electrical connection between the voice coil 5 and the external circuit.

[0064] In order to improve the polarization of the sound-emitting device, the conductive diaphragm 1 is sealed and fixed on the reinforcement part 2 in the present invention, and a hollow hole is provided in the middle part of the reinforcement part 2 and the outer folding ring 3. The conductive diaphragm 1 is sealed and connected to the Halbach magnetic circuit, thereby improving the polarization of the sound-emitting device.

[0065] In order to further improve the polarization problem, optionally, the conductive diaphragm 1 and the outer fold ring 3 can be designed as an integrally formed structure, the reinforcement part 2 is connected to the integrally formed connection between the conductive diaphragm 1 and the outer fold ring 3, the middle part of the reinforcement part 2 is a hollow hole, and the first fold ring 1 covers the hollow hole and is sealed and connected to the central magnetic circuit 91.

[0066] Furthermore, the skeleton 4 is arranged around the inner edge of the reinforcement part 2, wherein one side of the skeleton 4 is connected to the reinforcement part 2, and the other side of the skeleton 4 is connected to the voice coil 5, so that the voice coil 5 is suspended in the magnetic gap 11. The voice coil 5 is connected to the diaphragm assembly through the skeleton 4, so that the voice coil 5 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.

[0067] The present invention also provides an electronic device, which includes the above-mentioned sound-generating device. The specific structure of the sound-generating device 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.

[0068] In this embodiment, the electronic device is connected to the sound device via a flexible circuit board, one end of the flexible circuit board is electrically connected to the sound device, and the other end of the flexible circuit board is used to connect the external circuit. It can be understood that the flexible circuit board is used to connect the external circuit to the sound device.

[0069] In this embodiment, the electronic device may be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., which is not limited here. In the electronic device, the sound device may be assembled into the housing of the electronic device in the form of a module or in the form of a single body.

[0070] 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: include: A magnetic circuit system, comprising a magnetic yoke, a central magnetic circuit and a side magnetic circuit arranged on the magnetic yoke, wherein the central magnetic circuit and the side magnetic circuit are located on the same side of the magnetic yoke, the side magnetic circuit is located outside the central magnetic circuit and encloses the central magnetic circuit to form a magnetic gap, the central magnetic circuit comprises a first magnetic group, a second magnetic group and a third magnetic group, the second magnetic group is sandwiched between the first magnetic group and the third magnetic group, and mounting holes are arranged on the first magnetic group, the second magnetic group and the third magnetic group; A vibration system, comprising a diaphragm assembly and a voice coil opposite to the magnetic circuit system, wherein the diaphragm assembly comprises a conductive diaphragm, the conductive diaphragm is electrically connected to the lead of the voice coil, one end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap; A conductive bracket is arranged in the mounting hole and fixed on the magnetic yoke, one end of the conductive bracket is fitted on the conductive diaphragm and electrically connected to the conductive diaphragm, and the other end of the conductive bracket is electrically connected to an external circuit; The first magnetic group and the third magnetic group are magnetized along the vibration direction of the vibration system and in opposite directions, and the magnetization direction of the second magnetic group is perpendicular to the vibration direction of the vibration system, so that the central magnetic circuit forms a Halbach magnetic circuit.

2. The sound generating device according to claim 1, characterized in that: A diaphragm pad is arranged on the periphery of the conductive diaphragm, the diaphragm pad is electrically connected to the wire of the voice coil, and the conductive diaphragm is electrically connected to the voice coil through the diaphragm pad.

3. The sound-generating device according to claim 2, characterized in that: The conductive support comprises an injection molded support, an internal soldering pad arranged on the upper end surface of the injection molded support, and an external soldering pad arranged on the lower end surface of the injection molded support, wherein: The injection-molded bracket passes through the mounting hole and is fixed on the magnetic yoke. The internal soldering pad is electrically connected to the middle part of the conductive diaphragm, and the external soldering pad is electrically connected to an external circuit.

4. The sound-generating device according to claim 3, characterized in that: The external pad is arranged corresponding to the through hole on the magnetic yoke, the external pad is welded to the flexible circuit board through the through hole, and the external pad is electrically connected to the external circuit through the flexible circuit board.

5. The sound generating device according to claim 1, characterized in that: The first magnetic group includes at least two first magnets that are symmetrically arranged at intervals, and the interval space formed by the two first magnets forms the mounting hole.

6. The sound generating device according to claim 5, characterized in that: The second magnetic circuit and the third magnetic circuit are both arranged in an annular shape, the second magnetic circuit comprises at least two second magnets connected in sequence, and the second magnets are arranged in an annular shape to form the mounting hole; The third magnetic circuit includes a third magnet provided as an integral structure, and the mounting hole is provided at the center of the third magnet; The conductive brackets respectively penetrate the mounting holes of the first magnetic circuit, the second magnetic circuit, and the third magnetic circuit and are fixed on the magnetic yoke.

7. The sound generating device according to claim 1, characterized in that: The second magnetic group is magnetized along a vibration direction perpendicular to the vibration system, and the magnetization direction of the second magnetic group is from the periphery of the second magnetic group to the center of the second magnetic group.

8. The sound generating device according to claim 1, characterized in that: The side magnetic circuit includes stacked side magnets and side magnetic conductive plates, and the side magnets are fixed on the magnetic conductive yoke; wherein the first magnetic group, the third magnetic group and the side magnets are all magnetized along the vibration direction of the vibration system, the magnetization direction of the first magnetic group is the same as the magnetization direction of the side magnets, and the magnetization direction of the third magnetic group is opposite to the magnetization direction of the side magnets.

9. The sound generating device according to claim 1, characterized in that: The diaphragm assembly further includes a reinforcement portion connected to the outer edge of the conductive diaphragm and an outer folding ring connected to the outer edge of the reinforcement portion, the middle portion of the reinforcement portion is a hollow hole, the conductive diaphragm cover is arranged in the hollow hole and is sealed and connected to the central magnetic circuit; Alternatively, the diaphragm assembly also includes an outer folding ring and a reinforcement portion connected to the edge of the conductive diaphragm, the conductive diaphragm and the outer folding ring are an integrally formed structure, the reinforcement portion is connected to the integrally formed connection between the conductive diaphragm and the outer folding ring, the middle portion of the reinforcement portion is a hollow hole, the conductive diaphragm cover is arranged in the hollow hole and is sealed and connected to the central magnetic circuit.

10. The sound generating device according to claim 9, characterized in that: Also includes the skeleton, One side of the frame is connected to the reinforcing part, and the other side of the frame is connected to the voice coil, so that the voice coil is suspended in the magnetic gap.

11. An electronic device, characterized in that: The device comprises a sound emitting device as claimed in any one of claims 1 to 10.

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