Sound production device and electronic device

Abstract

The application provides a sound production device and an electronic device. The sound production device comprises a magnetic circuit system, a magnetic yoke, a center magnetic circuit and a side magnetic circuit. The side magnetic circuit and the center magnetic circuit form a magnetic gap. The center magnetic circuit comprises a first magnetic group, a second magnetic group and a third magnetic group. The second magnetic group is arranged between the first magnetic group and the third magnetic group to form a Halbach magnetic circuit. Mounting holes are arranged on the first magnetic group, the second magnetic group and the third magnetic group. A vibration system comprises a diaphragm assembly and a 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 support is arranged in the mounting hole and fixed on the magnetic yoke. One end of the conductive support is arranged on and electrically connected to the conductive diaphragm, and the other end is electrically connected to an external circuit. The application can solve the problem that the performance of the existing sound production device is poor due to the limitation of the space size and the non-increase of the BL value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic transduction, in particular to a sound generating device and an electronic device using the same. BACKGROUND

[0002] In recent years, convenient electronic devices (such as mobile phones, earphones, computers) have penetrated into people's daily life. With the rapid development of technology, people's demand for the sound quality of electronic devices is also getting higher and higher, and the full-frequency and miniaturization of loudspeakers have become mainstream demands.

[0003] At present, the box space in the electronic device is getting smaller and smaller, and 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, thereby causing the voice coil to receive a small magnetic field force, which makes the sensitivity of the sound generating device low and the overall acoustic performance and sound effect poor. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a sound generating device and an electronic device to solve the problem that the performance of the existing sound generating device is poor due to the limitation of the space size BL value.

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

[0006] A magnetic circuit system comprising a magnetic yoke, a center magnetic circuit and a side magnetic circuit arranged on the magnetic yoke, the center magnetic circuit and the side magnetic circuit being located on the same side of the magnetic yoke, the side magnetic circuit being located outside the center magnetic circuit and surrounding the center magnetic circuit to form a magnetic gap, the center magnetic circuit comprising a first magnetic group, a second magnetic group and a third magnetic group, the second magnetic group being arranged between the first magnetic group and the third magnetic group, and mounting holes being arranged on the first magnetic group, the second magnetic group and the third magnetic group;

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

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

[0009] Wherein, the first magnetic group and the third magnetic group are magnetized along the vibration direction of the vibration system and the magnetization directions are opposite, and the magnetization direction of the second magnetic group is perpendicular to the vibration direction of the vibration system, so as to form a Halbach magnetic circuit.

[0010] In addition, preferably, a vibrating diaphragm pad is arranged at the periphery of the conductive vibrating diaphragm, the vibrating diaphragm pad is electrically connected with the lead wire of the voice coil, and the conductive vibrating diaphragm is electrically connected with the voice coil through the vibrating diaphragm pad.

[0011] In addition, preferably, the conductive support includes an injection molded support, an inner pad arranged at the upper end surface of the injection molded support, and an outer pad arranged at the lower end surface of the injection molded support, the injection molded support penetrates through the mounting hole and is fixed on the magnetic yoke, the inner pad is electrically connected with the middle part of the conductive vibrating diaphragm, and the outer pad is electrically connected with an external circuit.

[0012] In addition, preferably, the outer pad is arranged corresponding to a through hole on the magnetic yoke, the outer pad is welded with a flexible circuit board through the through hole, and the outer pad is electrically connected with the external circuit through the flexible circuit board.

[0013] In addition, preferably, the first magnetic group includes at least two first magnets symmetrically arranged at intervals, and the interval space formed by the two first magnets forms the mounting hole.

[0014] In addition, preferably, the second magnetic circuit and the third magnetic circuit are arranged in a ring shape, the second magnetic circuit includes at least two second magnets connected in sequence, and the second magnets are arranged in a ring shape to enclose the mounting hole.

[0015] The third magnetic circuit includes a third magnet arranged in an integral structure, and the mounting hole is arranged at the center of the third magnet.

[0016] The conductive support penetrates through the mounting holes of the first magnetic circuit, the second magnetic circuit, and the third magnetic circuit and is fixed on the magnetic yoke.

[0017] In addition, preferably, 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 direction perpendicular to the vibration direction of the vibration system, and the magnetization direction of the second magnetic group is a direction from the periphery of the second magnetic group to the center of the second magnetic group.

[0019] In addition, preferably, the side magnetic circuit includes a side magnet and a side magnetic guide plate arranged in a stack, and the side magnet is fixed on the magnetic yoke; wherein the first magnetic group, the third magnetic group, and the side magnet 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 magnet, and the magnetization direction of the third magnetic group is opposite to the magnetization direction of the side magnet.

[0020] Furthermore, in a preferred embodiment, the diaphragm assembly further includes a reinforcing portion connected to the outer edge of the conductive diaphragm and an outer folded ring connected to the outer edge of the reinforcing portion.

[0021] The middle portion of the reinforcing part has a hollow hole, and the conductive diaphragm is placed over the hollow hole and sealed to the central magnetic circuit; or...

[0022] The diaphragm assembly further includes an outer folded ring and a reinforcing portion connected to the edge of the conductive diaphragm. The conductive diaphragm and the outer folded ring are integrally formed. The reinforcing portion is connected to the integrally formed connection between the conductive diaphragm and the outer folded ring. The middle part of the reinforcing portion is a hollow hole. The conductive diaphragm is covered by the hollow hole and sealed to the central magnetic circuit.

[0023] In addition, a preferred embodiment includes a skeleton, one side of which is connected to the reinforcing part, and the other side of which is connected to the voice coil, so that the voice coil is suspended within the magnetic gap.

[0024] The present invention also provides an electronic device including the above-described sound-generating device.

[0025] As can be seen from the above technical solution, the sound-generating device and electronic device provided by the present invention, by setting the central magnetic circuit as a Hellbeck magnetic circuit, can effectively improve the magnetic field strength, increase the density of magnetic flux in the magnetic gap, increase the number of magnetic lines of force passing through the voice coil, increase the magnetic force on the voice coil, effectively improve the BL value, improve the sensitivity of the sound-generating device, effectively improve the flatness of the BL curve, significantly improve the FR frequency response curve, and effectively reduce harmonic distortion (THD), thereby improving the overall sound effect and performance. By setting a conductive support in the Hellbeck magnetic circuit, the conductive support is attached to the conductive diaphragm, and the conductive diaphragm is electrically connected to the voice coil. The voice coil is electrically connected to the external circuit through the conductive support and the conductive diaphragm. In addition, the polarization problem of the speaker is improved by sealing the conductive diaphragm with the Hellbeck magnetic circuit.

[0026] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0027] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0028] Figure 1Exploded view of sound production device according to an embodiment of the present application;

[0029] Figure 2 Schematic diagram of conductive support structure according to an embodiment of the present application;

[0030] Figure 3 Schematic diagram of cross-sectional structure of sound production device according to an embodiment of the present application;

[0031] Figure 4 Schematic diagram of partial cross-sectional structure of sound production device according to an embodiment of the present application;

[0032] Figure 5 Schematic diagram of conductive diaphragm and conductive pad position according to an embodiment of the present application;

[0033] Figure 6 Top view of sound production device according to an embodiment of the present application;

[0034] Figure 7 Schematic diagram of magnetization of sound production device according to an embodiment of the present application.

[0035] The reference signs in the drawings include: 1, conductive diaphragm, 2, reinforcing part, 3, outer folding ring, 4, skeleton, 5, voice coil, 6, metal shell, 8, conductive support, 81, first inner connection pad, 82, second inner connection pad, 83, first outer connection pad, 84, second outer connection pad, 91, central magnetic circuit, 911, first magnetic group, 912, second magnetic group, 913, third magnetic group, 92, edge magnetic circuit, 921, edge magnetic conducting plate, 922, edge magnet, 93, mounting hole, 10, magnetic yoke, 101, first through hole, 102, second through hole, 11, magnetic gap, 12, flexible circuit board, 13, diaphragm pad.

[0036] The same reference signs in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0037] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It is apparent, however, that the embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0038] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] To solve the problem that the performance of the existing sound generating device is deteriorated due to the limitation of the space size and the BL value cannot be increased, the present application provides a sound generating device and electronic equipment.

[0040] The specific embodiments of the present application 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 application, Figures 1 to 7 The structure of the sound generating device is exemplarily indicated from different angles. Specifically, Figure 1 The exploded structure of the sound generating device according to the embodiment of the present application is shown; Figure 2 The conductive support structure according to the embodiment of the present application is shown; Figure 3 The cross-sectional structure of the sound generating device according to the embodiment of the present application is shown; Figure 4 The partial cross-sectional structure of the sound generating device according to the embodiment of the present application is shown; Figure 5 The conductive diaphragm and conductive pad positions according to the embodiment of the present application are shown; Figure 6 The top view structure of the sound generating device according to the embodiment of the present application is shown; Figure 7 The magnetization of the sound generating device according to the embodiment of the present application is shown.

[0042] As Figures 1 to 7As shown in the drawings, the sound generating device provided by the present application comprises a magnetic circuit system, a vibration system and a conductive support 8. The magnetic circuit system comprises a magnetic yoke 10, a center magnetic circuit 91 and a side magnetic circuit 92 arranged on the magnetic yoke 10, the center magnetic circuit 91 and the side magnetic circuit 92 are located on the same side of the magnetic yoke 10, the side magnetic circuit 92 is located outside the center magnetic circuit 91 and forms a magnetic gap 11 together with the center magnetic circuit 91, the center magnetic circuit 91 comprises a first magnetic group 911, a second magnetic group 912 and a third magnetic group 913, the second magnetic group 912 is arranged 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 comprises a diaphragm assembly opposite to the magnetic circuit system and a voice coil 5, the diaphragm assembly comprises a conductive diaphragm 1, the conductive diaphragm 1 is electrically connected with the lead wire of the voice coil 5, one end of the voice coil 5 is connected with the diaphragm assembly, and the other end of the voice coil 5 is suspended in the magnetic gap 11; the conductive support 8 is arranged in the mounting hole 93 and fixed on the magnetic yoke 10, one end of the conductive support 8 is arranged on and electrically connected with the conductive diaphragm 1, and the other end of the conductive support 8 is electrically connected with 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 the magnetization directions thereof are opposite, and the magnetization direction of the second magnetic group 912 is perpendicular to the vibration direction of the vibration system, so that the center magnetic circuit 91 forms a Halbach magnetic circuit.

[0043] In the embodiment of the present application, the sound generating device can be a sound generating unit of a loudspeaker, and the loudspeaker can be a micro loudspeaker. It should be noted that the magnetic circuit system and the vibration system of the sound generating device are arranged oppositely. Alternatively, the magnetic circuit system is arranged in a square shape. For example, the magnetic circuit system can comprise a center magnetic circuit 91 and a side magnetic circuit 92 which are both square structures. The vibration system is also arranged in a square shape. It can be understood that the periphery of the diaphragm assembly of the vibration system can be connected with the magnetic circuit system, or the magnetic circuit system and the vibration system are respectively assembled on a module shell, which is not limited herein.

[0044] In order to better assemble the magnetic circuit system and the vibration system of the sound generating device, Figures 1 to 7In the shown embodiment, the sound production device further comprises an outer metal shell 6, the magnetic circuit system is connected to one end of the metal shell 6, and 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 this embodiment, the metal shell 6 is used to mount, fix and support the components such as the magnetic circuit system and the vibration system, that is, the metal shell 6 provides a mounting base for the components such as the magnetic circuit system and the vibration system. It can be understood that the metal shell 6 can be a whole structure or a plurality of split structures cooperatively formed, which is not limited herein. In this embodiment, the metal shell 6 can be selected as a square frame structure, that is, the metal shell 6 has a cavity with two open ends, and the magnetic circuit system and the vibration system are connected to the two sides of the metal shell 6 respectively, so that the magnetic circuit system, the shell and the diaphragm assembly of the vibration system form a vibration cavity.

[0045] In the shown embodiment, the sound production device further comprises an outer metal shell 6, the magnetic circuit system is connected to one end of the metal shell 6, and 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 this embodiment, the metal shell 6 is used to mount, fix and support the components such as the magnetic circuit system and the vibration system, that is, the metal shell 6 provides a mounting base for the components such as the magnetic circuit system and the vibration system. It can be understood that the metal shell 6 can be a whole structure or a plurality of split structures cooperatively formed, which is not limited herein. In this embodiment, the metal shell 6 can be selected as a square frame structure, that is, the metal shell 6 has a cavity with two open ends, and the magnetic circuit system and the vibration system are connected to the two sides of the metal shell 6 respectively, so that the magnetic circuit system, the shell and the diaphragm assembly of the vibration system form a vibration cavity.

[0046] In this embodiment, the metal shell 6 is used to accommodate and fix the structures such as the vibration system and the magnetic circuit system, so that the sound production device can be applied as an independent component in the electronic device or the sound production module, which is not limited herein. Of course, in other embodiments, the sound production device can also be a module structure, and the structures such as the vibration system and the magnetic circuit system of the sound production device are mounted on the metal shell 6 of the module structure as a plurality of independent components, which is not limited herein.

[0047] It can be understood that by arranging the magnetic circuit system as the magnetic yoke 10, the center magnetic circuit 91 and the side magnetic circuit 92 arranged 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 herein. In this embodiment, the side magnetic circuit 92 is located outside the center magnetic circuit 91 and forms the magnetic gap 11 with the center magnetic circuit 91, 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 and spaced from the magnetic circuit system, thereby connecting one end of the voice coil 5 to the diaphragm assembly and suspending the other end of the voice coil 5 in the magnetic gap 11.

[0048] In order to realize the electrical connection between the voice coil 5 and the external circuit, in the embodiment of the present application, as shown in Figures 1 to 7As shown, the diaphragm assembly includes the conductive diaphragm 1, the conductive diaphragm 1 is electrically connected with the lead of the voice coil 5 through the diaphragm pad 13, the conductive support 8 is attached to the conductive diaphragm 1 and is electrically connected with the conductive diaphragm 1, so that the external current is introduced into the voice coil 5 through the conductive support 8, the conductive support 8 is located in the middle position and is electrically connected with the conductive diaphragm 1, the side magnetic circuit 92 does not need to be provided with the structure for avoiding the lead of the voice coil 5, the performance of the side magnetic circuit 92 is stronger, so that the sound production effect and the acoustic performance of the sound production device are improved.

[0049] Optionally, the mounting hole 25 can be a circular hole, an oval hole, a square hole, a triangular hole or a polygonal hole or a special-shaped hole, and the specific selection and arrangement are not limited herein.

[0050] In the embodiment of the present application, the first magnetic group 911 includes at least two first magnets which are symmetrically arranged at intervals, and the interval space formed by the two magnets forms the mounting hole 93 for mounting the conductive support. The second magnetic circuit 912 and the third magnetic circuit 913 are both arranged in a ring shape, the second magnetic circuit 912 includes at least two second magnets which are sequentially connected, and the second magnets are arranged in a ring shape to form the mounting hole 93; the third magnetic circuit 913 includes a third magnet which is arranged in an integral structure, and the mounting hole 93 for mounting the conductive support is arranged at the center of the third magnet; the conductive support 8 penetrates the mounting hole 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 application, the first magnetic group 911 and the third magnetic group 913 of the center magnetic circuit 91 are magnetized along the vibration direction of the vibration system, and the second magnetic group 912 is magnetized in a direction perpendicular to the vibration direction of the vibration system, that is, the second magnetic group 912 is magnetized along a direction perpendicular to the vibration direction of the vibration system, so that the center magnetic circuit 91 forms a Halbach magnetic circuit and forms a magnetic field with high magnetic field strength, thereby increasing the magnetic flux density of the magnetic gap 11, increasing the number of magnetic lines of force passing through the voice coil 5, increasing the magnetic field force acting on the voice coil 5, effectively improving the BL value, improving the sensitivity of the sound production device, and better improving the sound effect and performance of the whole machine.

[0052] Optionally, the vibration direction of the vibration system in the embodiment can be a vertical direction, and the first magnetic group 911 and the third magnetic group 913 of the center magnetic circuit 91 are both magnetized along the vertical direction. It can be understood that the magnetization direction of the second magnetic group 9122 is perpendicular to the magnetization direction of the first magnetic group 911 and the third magnetic group 913, that is, the second magnetic group 9122 is magnetized along the horizontal direction. It should be noted that,Figure 7 The arrows in the central magnetic circuit system indicate the direction of magnetization.

[0053] Understandably, the central magnetic circuit 91 forms a Heilbeck magnetic array, which can generate a strong magnetic field. The magnetic field generated by the Heilbeck magnetic array drives the voice coil 5 to vibrate the diaphragm assembly and produce sound. This results in a strong magnetic field at the voice coil 5, which is beneficial to improving the sensitivity of controlling the diaphragm vibration. Furthermore, the Heilbeck magnetic array allows for a uniform distribution of magnetic field lines at the voice coil 5 and good linearity in the magnetic field change in the direction of diaphragm assembly vibration. This can effectively improve the sound quality of the audio output by the sound-producing device, enhance the treble effect, and alleviate the distortion of the audio output by the sound-producing device to a certain extent.

[0054] exist Figure 7 In the illustrated embodiment, the magnetization direction of the first magnetic group 911 is opposite to that of the third magnetic group 913. The second magnetic group 912 is magnetized along the vibration direction perpendicular to the vibration direction of the vibration system and in the opposite direction. The magnetization direction of the second magnetic group 912 is along the periphery of the second magnetic group 912 towards the center of the second magnetic group 912. The polarity of the outer side of the second magnetic group 912 is the same as the polarity of the first magnetic group 911 near the end of the second magnetic group 912. This causes the magnetic field lines of the first magnetic group 911 and the third magnetic group 913 to converge at the second magnetic group 912. A magnetic field with a strong magnetic field strength is generated by the central magnetic circuit and passes through the magnetic gap 11, thereby increasing the magnetic flux density of the magnetic gap 11, increasing the number of magnetic field lines passing through the voice coil 5, increasing the magnetic 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 side magnet 922 and a side magnetic plate 921 stacked together, and the side magnet 92 is fixed on the magnetic 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 magnetization direction of the first magnetic group 911 is the same as the magnetization direction of the side magnet 922, and the magnetization direction of the third magnetic group 913 is opposite to the magnetization direction of the side magnet 922.

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

[0057] Optionally, the side magnetic circuit 92 is arranged in a ring shape, with the annular side magnetic circuit 92 located outside the central magnetic circuit 91 and forming a magnetic gap 11 between it and the central magnetic circuit 91. Optionally, the side magnet 922 and / or the side magnetic plate 921 form a closed, integrated ring structure.

[0058] In Figure 2 In the embodiment shown, the conductive support 8 comprises an injection support, inner pads arranged on the upper end surface of the injection support, and outer pads arranged on the lower end surface of the injection support, wherein the injection support penetrates through the mounting hole 93 and is fixed on the magnetic yoke 10, the inner pads are electrically connected with the middle part of the conductive diaphragm 1, and the outer pads are electrically connected with the external circuit.

[0059] In the embodiment shown, the conductive support 8 comprises an injection support, inner pads arranged on the upper end surface of the injection support, and outer pads arranged on the lower end surface of the injection support, wherein the injection support penetrates through the mounting hole 93 and is fixed on the magnetic yoke 10, the inner pads are electrically connected with the middle part of the conductive diaphragm 1, and the outer pads are electrically connected with the external circuit.

[0060] In the embodiment of the present application, the diaphragm assembly comprises the conductive diaphragm 1 arranged corresponding to the center magnetic circuit 91, the reinforcing part 2 connected with the edge of the conductive diaphragm 1, and the outer folding ring 3 connected with the outer edge of the reinforcing part 2, the middle part of the reinforcing part 2 is a hollow hole, and the conductive diaphragm 1 is arranged on the hollow hole and is in sealing connection with the center magnetic circuit 91.

[0061] Further, the sound generating device further comprises a framework 4, one side of the framework 4 is connected with the reinforcing part 2, and the other side of the framework 4 is connected with the voice coil 5, so that the voice coil 5 is suspended in the magnetic gap. The first folding ring 1 and the second folding ring 3 are respectively located on the two sides of the reinforcing part 2, and the framework 4 and the second folding ring 3 are located on the same side of the reinforcing part 2.

[0062] In the embodiment of the present application, the conductive diaphragm 1 and the outer folding ring 3 are both provided with protruding parts, which are recessed or protruded towards the side of the vibration system according to specific conditions, which are not specifically limited here.

[0063] In the embodiment of the present application, the conductive diaphragm 1 has electrical conductivity, and the diaphragm pads 13 are arranged on the periphery (which can be the corner) of the conductive diaphragm 1, the conductive diaphragm 1 is electrically connected with the lead of the voice coil 5 through the diaphragm pads 13, in addition, the middle part of the conductive diaphragm 1 is arranged in abutment with and electrically connected with the first inner pad 81 and the second inner pad 82 of the conductive support 8, and the outer pad of the conductive support 8 is electrically connected with the external circuit. Therefore, the electrical conductivity of the conductive diaphragm 1 and the conductive support 8 realize the electrical connection between the voice coil 5 and the external circuit.

[0064] In order to improve the polarization of the sound generating device, the conductive diaphragm 1 is fixed on the reinforcing part 2 in the present application, the middle part of the reinforcing part 2 and the outer folding ring 3 is a hollow hole, and the conductive diaphragm 1 is in sealing connection with the Halbach magnetic circuit, so as to improve the polarization of the sound generating device.

[0065] In order to further improve the polarization problem, the conductive diaphragm 1 and the outer folded ring 3 can be designed as an integral structure, and the reinforcing part 2 is connected to the integral structure of the conductive diaphragm 1 and the outer folded ring 3. The middle part of the reinforcing part 2 is a hollow hole, and the first folded ring 1 cover is arranged in the hollow hole and is sealingly connected with the center magnetic circuit 91.

[0066] Further, the skeleton 4 is arranged around the inner edge of the reinforcing part 2, wherein one side of the skeleton 4 is connected with the reinforcing part 2, and the other side of the skeleton 4 is connected with the voice coil 5, so that the voice coil 5 is suspended in the magnetic gap 11. The voice coil 5 is connected with the diaphragm assembly through the skeleton 4, so that the voice coil 5 is in a more reasonable magnetic field, that is, the region with the maximum magnetic flux density, thereby effectively improving the BL value.

[0067] The present application also provides an electronic device comprising the sound generating device. The specific structure of the sound generating device is described in the foregoing embodiments. Since the electronic device adopts all the technical solutions of the foregoing embodiments, it has all the beneficial effects of the technical solutions of the foregoing embodiments, which will not be repeated here.

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

[0069] In the embodiment, the electronic device can 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 generating device can be assembled into the shell of the electronic device in a module form or in a single form.

[0070] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A sound-generating device, characterized in that, include: A magnetic circuit system includes a magnetic yoke, a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke. 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 forms a magnetic gap with the central magnetic circuit. The central magnetic circuit includes 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. Mounting holes are provided on the first magnetic group, the second magnetic group and the third magnetic group. The vibration system includes a diaphragm assembly and a voice coil opposite to the magnetic circuit system. The diaphragm assembly includes a conductive diaphragm, which is electrically connected to the lead wire 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 disposed in the mounting hole and fixed on the magnetic yoke. One end of the conductive bracket is attached to 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 and third magnetic groups are magnetized along the vibration direction of the vibration system but in opposite directions, while the second magnetic group is magnetized perpendicular to the vibration direction of the vibration system, so that the central magnetic circuit forms a Heilbeck magnetic circuit. The conductive support includes an injection-molded support, an inner solder pad disposed on the upper end face of the injection-molded support, and an outer solder pad disposed on the lower end face of the injection-molded support, wherein... The injection-molded bracket passes through the mounting hole and is fixed on the magnetic yoke. The inner solder pad is electrically connected to the middle part of the conductive diaphragm, and the outer solder pad is electrically connected to the external circuit. The external solder pads are correspondingly arranged with the through holes on the magnetic yoke. The external solder pads are soldered to the flexible circuit board through the through holes, and the external solder pads are electrically connected to the external circuit through the flexible circuit board.

2. The sound-generating device according to claim 1, characterized in that, A diaphragm pad is provided around 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 1, characterized in that, The first magnetic assembly includes at least two first magnets symmetrically arranged at intervals, and the space between the two first magnets forms the mounting hole.

4. The sound-generating device according to claim 3, characterized in that, Both the second magnetic group and the third magnetic group are arranged in a ring. The second magnetic group includes at least two second magnets connected in sequence, and the second magnets form the mounting hole in a ring. The third magnetic assembly includes a third magnet with an integral structure, and the mounting hole is provided at the center of the third magnet; The conductive bracket passes through the mounting holes of the first magnetic group, the second magnetic group, and the third magnetic group respectively and is fixed on the magnetic yoke.

5. The sound-generating device according to claim 1, characterized in that, The second magnetic group is magnetized along the 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 towards the center of the second magnetic group.

6. The sound-generating device according to claim 1, characterized in that, The side magnetic circuit includes stacked side magnets and side magnetic plates, with the side magnets fixed on the magnetic 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.

7. The sound-generating device according to claim 1, characterized in that, The diaphragm assembly further includes a reinforcing portion connected to the outer edge of the conductive diaphragm and an outer folded ring connected to the outer edge of the reinforcing portion. The middle part of the reinforcing portion is a hollow hole, and the conductive diaphragm is covered by the hollow hole and sealed to the central magnetic circuit. Alternatively, the diaphragm assembly may further include an outer folding ring and a reinforcing portion connected to the edge of the conductive diaphragm. The conductive diaphragm and the outer folding ring are integrally formed. The reinforcing portion is connected to the integrally formed connection between the conductive diaphragm and the outer folding ring. The middle part of the reinforcing portion is a hollow hole. The conductive diaphragm is covered by the hollow hole and sealed to the central magnetic circuit.

8. The sound-generating device according to claim 7, characterized in that, It also includes the skeleton, One side of the skeleton is connected to the reinforcing 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.

9. An electronic device, characterized in that, Includes the sound-generating device as described in any one of claims 1 to 8.

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