Speaker module core, speaker module and electronic device

Abstract

The application discloses a loudspeaker module core, a loudspeaker module and an electronic device, and relates to the technical field of electronic devices, and the loudspeaker module can balance the thinness and audio performance of the device. The loudspeaker module core comprises a diaphragm group, a first voice coil, a magnetic circuit system and a second voice coil. The first voice coil is connected with the diaphragm group, and the magnetic circuit system is located on the same side of the diaphragm group as the first voice coil. The second voice coil is fixed to the diaphragm group, and the second voice coil and the first voice coil are located on opposite sides of the diaphragm group, respectively. The first voice coil and the second voice coil are matched with the magnetic circuit system to synchronously drive the diaphragm group to vibrate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to a loudspeaker module core, a loudspeaker module and an electronic device. BACKGROUND

[0002] With the rapid development of science and technology, the popularity rate of loudspeakers is getting higher and higher. People's requirements for loudspeaker modules are not only limited to playing video and audio, but also have higher requirements for the sound quality of the loudspeaker modules. However, the core in the related art has small driving force acting on the diaphragm group and poor acoustic performance. SUMMARY

[0003] The present application provides a loudspeaker module core, a loudspeaker module and an electronic device, which can simultaneously consider device thinning and audio performance.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, the present application provides a loudspeaker module core, which comprises a diaphragm group, a first voice coil, a magnetic circuit system and a second voice coil. The first voice coil is connected with the diaphragm group. The magnetic circuit system and the first voice coil are located on the same side of the diaphragm group. The second voice coil is fixed to the diaphragm group, and the second voice coil and the first voice coil are located on opposite sides of the diaphragm group, respectively. The first voice coil and the second voice coil are matched with the magnetic circuit system to synchronously drive the diaphragm group to vibrate.

[0006] The loudspeaker module core provided by the present application sets two voice coils, i.e. the first voice coil and the second voice coil, so that the winding length of the voice coil is longer. Since the winding length L of the voice coil is increased, the corresponding electric power conversion coefficient BL is larger, and the driving force BLI of the loudspeaker module is larger, so that the low-frequency performance of the loudspeaker module is improved. At the same time, the setting of the second voice coil can increase the rigidity of the diaphragm group, which is beneficial to improve the high-frequency performance of the core, so that a high-frequency loudspeaker module does not need to be set in the electronic device, and the structure of the electronic device is simplified. In addition, the second voice coil is arranged on the side surface of the diaphragm group away from the magnetic circuit system, and the magnetic force lines diverging outward from the magnetic circuit system act on the second voice coil, without the need to change the structure of the original magnetic circuit system, which is beneficial to reduce the production cost of the core.

[0007] In a possible design manner of the first aspect, the central axis of the first voice coil coincides with the central axis of the second voice coil. That is, the first voice coil and the second voice coil are coaxially arranged. In this way, the split vibration in the vibration process of the diaphragm group can be avoided, and the audio performance of the core can be improved.

[0008] In a possible design of the first aspect, the diaphragm group comprises a dome and a diaphragm, the second voice coil is arranged on the dome, the diaphragm surrounds the edge of the dome, a part of the diaphragm protrudes in a direction away from the first voice coil to form a folded ring, and the thickness of the second voice coil is less than or equal to the height of the folded ring. In this way, the driving force of the diaphragm group can be increased without changing the thickness of the inner core, so that the thin design of the inner core can be implemented while the audio performance of the inner core is improved.

[0009] In a possible design of the first aspect, the second voice coil is a planar voice coil. The planar voice coil has a small thickness, so that the thickness of the inner core can be reduced, and the thin design of the inner core can be implemented. Meanwhile, the second voice coil is arranged as a planar voice coil, so that the length of the wire of the second voice coil can be ensured while the weight of the second voice coil is reduced, and the vibration resistance of the diaphragm group is reduced, thereby improving the audio performance of the inner core. Therefore, the inner core provided in this application can balance the thin design and the audio performance to a certain extent. In addition, the second voice coil is arranged as a planar voice coil, so that the contact area between the second voice coil and the dome can be increased, thereby increasing the rigidity of the diaphragm group and improving the high-frequency performance of the inner core, so that a high-frequency loudspeaker module does not need to be arranged in the electronic device, and the structure of the electronic device is simplified.

[0010] In a possible design of the first aspect, the second voice coil is annular. In this way, the weight of the second voice coil can be further reduced, and the audio performance of the inner core is further improved.

[0011] In a possible design of the first aspect, the second voice coil is wound by a copper-aluminum alloy wire. The copper-aluminum alloy has a small density, and the second voice coil is wound by the copper-aluminum alloy wire, so that the weight of the second voice coil can be reduced, thereby improving the audio performance of the inner core. Meanwhile, the process of winding the wire to form the coil is simple, and the processing cost is reduced.

[0012] In a possible design of the first aspect, the inner core further comprises a positive conductive layer and a negative conductive layer, the positive conductive layer and the negative conductive layer are arranged on the side surface of the diaphragm group away from the magnetic circuit system, the positive terminal of the second voice coil is connected to the positive conductive layer, and the negative terminal of the second voice coil is connected to the negative conductive layer.

[0013] In a possible design of the first aspect, the positive terminal of the second voice coil is projected onto the positive conductive layer on the dome, and the negative terminal of the second voice coil is projected onto the negative conductive layer on the dome. In this way, the positive conductive layer and the positive terminal of the second voice coil are electrically connected, and the negative conductive layer and the negative terminal of the second voice coil are electrically connected.

[0014] In a possible design of the first aspect, the positive conductive layer and the negative conductive layer both extend outward to the outer edge of the diaphragm group. In this way, the difficulty of electrical connection between the positive conductive layer, the negative conductive layer and the internal circuit of the electronic device can be reduced, and the assembly efficiency can be improved.

[0015] In a second aspect, the present application provides a loudspeaker module, comprising a core, which is the core of any of the technical solutions described above.

[0016] In a possible design of the second aspect, the magnetic circuit system comprises a center magnet and an edge magnet, the edge magnet is arranged around the circumference of the center magnet; the loudspeaker module further comprises a first auxiliary magnet, the first auxiliary magnet is located on the side of the diaphragm group away from the magnetic circuit system, a projection of the first auxiliary magnet on the diaphragm group along the central axis of the diaphragm group is a first projection, a projection of the second voice coil on the diaphragm group along the central axis of the diaphragm group is a second projection, and the first projection overlaps the second projection.

[0017] In a possible design of the second aspect, a projection of the center magnet on the diaphragm group along the central axis of the diaphragm group is a third projection, and the third projection overlaps the first projection. In this way, the second voice coil can be ensured to be in the magnetic field of the first auxiliary magnet, so that the magnetic field strength of the magnetic field used for cooperation with the second voice coil can be increased, the driving force of the diaphragm group can be improved, and the sensitivity of the loudspeaker module can be improved.

[0018] In a possible design of the second aspect, the magnetic pole of the first auxiliary magnet close to one end of the center magnet is opposite to the magnetic pole of the center magnet close to the first auxiliary magnet, and the magnetic pole of the first auxiliary magnet away from one end of the center magnet is the same as the magnetic pole of the center magnet close to the first auxiliary magnet.

[0019] In a possible design of the second aspect, the magnetic pole of the first auxiliary magnet close to one end of the center magnet is the same as the magnetic pole of the center magnet close to the first auxiliary magnet, and the magnetic pole of the first auxiliary magnet away from one end of the center magnet is opposite to the magnetic pole of the center magnet close to the first auxiliary magnet.

[0020] In a possible design of the second aspect, the loudspeaker module further comprises a shell, the diaphragm group is arranged in the shell, the shell comprises a first cover plate, the first cover plate is opposite to the diaphragm group, and the first auxiliary magnet is arranged on the first cover plate. In this way, the fixation of the first auxiliary magnet is facilitated.

[0021] In a possible design of the second aspect, the first cover plate comprises a cover plate body and a reinforcing plate, the cover plate body is provided with an assembly opening, the reinforcing plate is arranged at the assembly opening and seals the assembly opening, and the first auxiliary magnet is arranged on the reinforcing plate. In this way, by arranging the reinforcing plate, the overall structural strength of the front shell can be improved without increasing the thickness of the front shell, and meanwhile, by arranging the reinforcing plate, resonance of the first cover plate can be effectively avoided, which is beneficial to improving the sound quality of the loudspeaker module.

[0022] In a possible design of the second aspect, a groove recessed towards the diaphragm group is arranged on the outer surface of the first cover plate, and the first auxiliary magnet is arranged in the groove. In this way, the overall volume of the loudspeaker module can be reduced, so as to save the overall occupied space of the loudspeaker module.

[0023] In a possible design of the first aspect, a hollow part is arranged on the bottom wall of the groove, and the orthographic projection of the first auxiliary magnet on the bottom wall of the groove covers the hollow part. In this way, at least part of the surface of the first auxiliary magnet is exposed from the hollow part, which is beneficial to increasing the inhibition of the magnetic lines of force of the central magnet by the first auxiliary magnet, so as to further increase the magnetic field strength in the magnetic gap.

[0024] In a possible design of the first aspect, a mounting hole is arranged on the first cover plate, and the first auxiliary magnet is arranged in the mounting hole. The mounting hole is formed as a through hole penetrating through the inner surface and the outer surface of the first cover plate. The outer peripheral wall of the first auxiliary magnet is connected with the inner edge of the mounting hole. In this way, the fixation of the first auxiliary magnet can be conveniently implemented, and meanwhile, resonance of the first cover plate can be effectively avoided, which is beneficial to improving the sound quality of the loudspeaker module.

[0025] In a possible design of the first aspect, at least part of the first auxiliary magnet extends into the front cavity. Specifically, part of the first auxiliary magnet extends into the front cavity, or the entire first magnet extends into the front cavity. In this way, the size of the loudspeaker module in the Z-axis direction, that is, the thickness dimension of the loudspeaker module can be reduced, and the overall volume of the loudspeaker module is reduced.

[0026] In a possible design of the first aspect, a sealing member is arranged in the shell, and the sealing member is used for sealing the gap between the first auxiliary magnet and the mounting hole. In this way, the gap between the mounting hole and the first auxiliary magnet can be effectively sealed by the sealing member, and the structure is simple and convenient to process.

[0027] In a possible design of the first aspect, the sealing member includes a first connecting piece, a sealing piece and a second connecting piece, and the first connecting piece, the sealing piece and the second connecting piece are all annular. The first connecting piece is connected to the inner surface of the first cover plate and surrounds the outer periphery of the mounting hole, the second connecting piece is connected to the end surface of the end of the first auxiliary magnet extending into the mounting hole, and the sealing piece is connected between the first connecting piece and the second connecting piece.

[0028] In a possible design of the first aspect, the sealing member can be a sealing glue filled between the mounting hole and the first auxiliary magnet. The sealing glue can seal the gap between the inner edge of the mounting hole and the first auxiliary magnet. This structure is simple, convenient to operate, suitable for sealing gaps of different shapes, has a wide range of applications and high flexibility. The sealing glue further bonds the first auxiliary magnet to the first cover plate, thereby improving the connection stability of the first auxiliary magnet and the first cover plate.

[0029] In a possible design of the first aspect, the first cover plate and the first auxiliary magnet are in an integrated structure. In this embodiment, the first cover plate can be a plastic part. In this way, the sealing between the first auxiliary magnet and the mounting hole can be improved, and no additional sealing member needs to be provided, thereby simplifying the assembly steps of the first auxiliary magnet and the first cover plate and improving the assembly efficiency.

[0030] In a possible design of the second aspect, the loudspeaker module further includes a second auxiliary magnet, the second auxiliary magnet is located on a side of the diaphragm group away from the magnetic circuit system, a projection of the second auxiliary magnet on the diaphragm group along a central axis of the diaphragm group is a fourth projection, a projection of the side magnet on the diaphragm group along the central axis of the diaphragm group is a fifth projection, the fourth projection and the fifth projection overlap, a magnetic pole of the second auxiliary magnet close to one end of the side magnet is the same as a magnetic pole of the side magnet close to the second auxiliary magnet, and a magnetic pole of the second auxiliary magnet away from the side magnet is opposite to the magnetic pole of the side magnet close to the second auxiliary magnet. In this way, by arranging the second auxiliary magnet, the magnetic force lines of the second auxiliary magnet and the magnetic force lines of the side magnet can be mutually inhibited, the magnetic force lines of the side magnet are effectively inhibited from diverging outward, the magnetic flux density in the magnetic gap is effectively increased, the magnetic field strength in the magnetic gap is increased, and the sensitivity and the acoustic performance of the loudspeaker module are improved. Meanwhile, since the second auxiliary magnet is located on the side of the diaphragm group away from the magnetic circuit system, the overall volume of the magnetic circuit system is not increased while the magnetic flux density in the magnetic gap is increased, which is conducive to the miniaturization design of the loudspeaker module, and the structure of the magnetic circuit system and the core of the loudspeaker module does not need to be changed in the production process, thereby effectively reducing the production cost.

[0031] In a possible design of the second aspect, the second auxiliary magnet is arranged on the first cover plate.

[0032] In one possible design of the second aspect, the second auxiliary magnet is arranged circumferentially around the first auxiliary magnet. The speaker module further includes a third auxiliary magnet, which is disposed between the first and second auxiliary magnets. The first and second auxiliary magnets are spaced apart from the third auxiliary magnet. The magnetization direction of the third auxiliary magnet is perpendicular to the magnetization direction of the first auxiliary magnet. The magnetic pole of the third auxiliary magnet at the end closest to the first auxiliary magnet is the same as the magnetic pole of the first auxiliary magnet at the end closest to the diaphragm assembly, and the magnetic pole of the third auxiliary magnet at the end furthest from the first auxiliary magnet is the same as the magnetic pole of the first auxiliary magnet at the end furthest from the diaphragm assembly. In this way, the first, second, and third auxiliary magnets can form a Heilbeck array, thereby concentrating the magnetic force towards the second voice coil and increasing the driving strength of the diaphragm assembly.

[0033] In one possible design of the second aspect, the second auxiliary magnet is disposed on the middle plate or housing of the electronic device.

[0034] Thirdly, this application provides an electronic device, including: a housing and a speaker module, the housing having a sound outlet hole, the speaker module being disposed inside the housing, the speaker module being a speaker module as described in any of the above technical solutions, the speaker module having a sound outlet channel communicating with the sound outlet hole.

[0035] Understandably, the beneficial effects that the speaker module of the second aspect and the electronic device of the third aspect can achieve can be referred to as the beneficial effects of the first aspect and any of its possible design methods, which will not be repeated here. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0037] Figure 2 for Figure 1 Exploded view of the electronic device;

[0038] Figure 3 for Figure 1 A perspective view of a speaker module inside the electronic device shown.

[0039] Figure 4 for Figure 3 Exploded view of the speaker module shown;

[0040] Figure 5a for Figure 4 A perspective view of the front housing of the speaker module shown.

[0041] Figure 5b for Figure 5a An exploded view of the front shell shown in the image;

[0042] Figure 5c for Figure 5a The diagram shows the structure of the front shell when viewed from below.

[0043] Figure 6 for Figure 4 The diagram shows the structure of the rear shell in the speaker module.

[0044] Figure 7 for Figure 4 The diagram shows the structure of the core in the speaker module.

[0045] Figure 8 for Figure 5c An enlarged view of region A in the structural schematic diagram shown;

[0046] Figure 9 for Figure 4 The diagram shows the assembly of the core and the housing in the speaker module shown.

[0047] Figure 10 A perspective view of the kernel provided for some embodiments of this application;

[0048] Figure 11 for Figure 10 An exploded view of the kernel shown;

[0049] Figure 12 for Figure 11 A three-dimensional view of the basin rack in the core shown;

[0050] Figure 13 for Figure 11 A schematic diagram of a diaphragm assembly in the core shown in the image;

[0051] Figure 14 for Figure 13 A three-dimensional cross-sectional view of the diaphragm assembly shown at line AA;

[0052] Figure 15 for Figure 14 An enlarged view of region B in the three-dimensional sectional view shown;

[0053] Figure 16 for Figure 13 The diaphragm assembly shown is Figure 12 The assembly diagram of the basin stand shown;

[0054] Figure 17 for Figure 16 The assembly drawing shown is a perspective sectional view at line BB;

[0055] Figure 18 for Figure 11 A schematic diagram of the structure of the first voice coil in the kernel shown in the figure;

[0056] Figure 19 for Figure 18The first voice coil shown is Figure 12 The basin stand shown Figure 13 The assembly structure diagram of the diaphragm assembly shown in the figure;

[0057] Figure 11 for Figure 20 A schematic diagram of the magnetic circuit system of the core shown in the figure;

[0058] Figure 21 for Figure 20 Exploded view of the magnetic circuit system shown;

[0059] Figure 22 For along Figure 10 A three-dimensional cross-sectional view of the kernel at the CC line shown in the diagram;

[0060] Figure 23 for Figure 20 The magnetic circuit system shown is Figure 12 The assembly diagram of the basin stand shown;

[0061] Figure 24 Perspective view of the kernel provided for other embodiments of this application;

[0062] Figure 25 for Figure 24 The 3D view shown is a cross-sectional view along line DD;

[0063] Figure 26 for Figure 24 A schematic diagram of the magnetic field where the second voice coil is located;

[0064] Figure 27 A perspective view of a speaker module provided in other embodiments of this application;

[0065] Figure 28 for Figure 27 A cross-sectional view of the speaker module shown;

[0066] Figure 29 This is a schematic diagram of the projection process of the first auxiliary magnet;

[0067] Figure 30 This is a cross-sectional view of a speaker module according to other embodiments of this application;

[0068] Figure 31 This is a cross-sectional view of a speaker module according to some embodiments of this application;

[0069] Figure 32 This is a perspective view of a speaker module according to some embodiments of this application;

[0070] Figure 33 for Figure 32 A cross-sectional view of the speaker module shown;

[0071] Figure 34 Cross-sectional views of a speaker module provided in some embodiments of this application;

[0072] Figure 35 Cross-sectional views of a speaker module provided in some embodiments of this application;

[0073] Figure 36 Cross-sectional views of a speaker module provided in some embodiments of this application;

[0074] Figure 37 Cross-sectional views of a speaker module provided in some embodiments of this application;

[0075] Figure 38 Assembly diagrams of speaker modules and electronic devices according to some embodiments of this application;

[0076] Figure 39 Cross-sectional views of a speaker module provided in some embodiments of this application;

[0077] Figure 40 Assembly diagrams of speaker modules and electronic devices according to other embodiments of this application;

[0078] Figure 41 A cross-sectional view of a speaker module provided in some embodiments of this application.

[0079] Figure label:

[0080] 100. Electronic devices;

[0081] 10. Screen; 11. Light-transmitting cover; 12. Display screen; 20. Back cover; 21. Back cover; 22. Bezel; 22a. Speaker hole; 22b. Port; 30. Mid-plate;

[0082] 301. Main circuit board; 302. Secondary circuit board; 303. Connection structure;

[0083] 40. Battery; 50. USB device;

[0084] 60. Speaker module; 60a. Sound output channel;

[0085] 61. Housing; 61a. Fixing part; 601. Front cavity; 602. Rear cavity;

[0086] 611, Front housing; 6111, First cover plate; 6111a, Cover plate body; 6111b, Assembly port; 6111c, Reinforcing plate; 6111d, Groove; 6111e, Hollowed-out portion; 6111f, Mounting hole; 6111g, Seal; 6111g1, First connecting piece; 6111g2, Sealing piece; 6111g3, Second connecting piece; 6112, First side frame; 6112a, First stepped surface; 6112b, Second stepped surface;

[0087] 612, Rear shell; 6121, Flat plate section; 6122, Second side frame;

[0088] 62. Kernel; 62a. Fixed surface;

[0089] 621, pot stand; 621a, first short side; 621b, second short side; 621c, first long side; 621c, first notch; 621d, second long side; 621d, second notch;

[0090] 622, Diaphragm assembly; 6221, Dome; 6221a, First top surface; 6221b, First bottom surface; 6221c, Limiting groove; 6222, Diaphragm; 6222a, First fixing part; 6222a1, Second top surface; 6222a2, Second bottom surface; 6222b, Folded ring; 6222c, Second fixing part; 6222c1, Third top surface; 6222c2, Third bottom surface; 6222d, Positive conductive layer; 6222e, Negative conductive layer;

[0091] 623. Magnetic circuit system; 6231. Central magnet; 6232. Side magnet; 6232a. First side magnet; 6232b. Second side magnet; 6232c. Third side magnet; 6232d. Fourth side magnet; 6233. Central magnetic yoke; 6234. Edge magnetic yoke; 6235. Lower magnetic yoke; 6238. First auxiliary magnet; 6239. Second auxiliary magnet; 623a. Magnetic gap; 6240. Third auxiliary magnet;

[0092] 6241, First voice coil; 6242, Second voice coil. Detailed Implementation

[0093] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0094] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0095] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0096] This application provides an electronic device, which is a type of electronic device with sound playback function. Specifically, the electronic device includes, but is not limited to, mobile phones, tablet personal computers, laptop computers, personal digital assistants (PDAs), personal computers, laptops, in-vehicle devices, wearable devices, portable music players, radios, etc. Among them, wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, smart glasses, etc.

[0097] Please see Figure 1 and Figure 2 , Figure 1 A perspective view of an electronic device 100 provided in some embodiments of this application. Figure 2 for Figure 1 An exploded view of the electronic device 100 shown. Figure 1 The illustrated electronic device 100 is a mobile phone. In this example, the electronic device 100 includes a screen 10, a back cover 20, a main circuit board 301, a secondary circuit board 302, a connection structure 303, a battery 40, a universal serial bus (USB) device, and a speaker module 60.

[0098] Understandable Figure 1 and Figure 2 The accompanying drawings below only schematically illustrate some components included in the electronic device 100; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 and Figure 2 As well as the accompanying drawings below. In addition, when the electronic device 100 is some other type of device, the electronic device 100 may not include at least one of the screen 10, the sub-circuit board 302, the connection structure 303, the battery 40 and the USB device 50.

[0099] exist Figure 1In the illustrated embodiment, the electronic device 100 is in the shape of a rectangular plate. For ease of description in the following embodiments, an XYZ coordinate system is established. Specifically, the width direction of the electronic device 100 is defined as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. It is understood that the coordinate system setting of the electronic device 100 can be flexibly configured according to actual needs and is not specifically limited here. In other embodiments, the shape of the electronic device 100 may also be a square plate, a circular plate, an elliptical plate, etc.

[0100] Screen 10 is used to display images, videos, etc. Screen 10 includes a light-transmitting cover plate 11 and a display panel 12. The light-transmitting cover plate 11 and the display panel 12 are stacked and fixedly connected by adhesive or other means. The light-transmitting cover plate 11 mainly serves to protect the display panel 12 and prevent dust. The material of the light-transmitting cover plate 11 includes, but is not limited to, glass. The display panel 12 can be a flexible display panel or a rigid display panel. For example, the display panel 12 can be an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a mini organic light-emitting diode (MLED) display panel, a micro organic light-emitting diode (MicroOLED) display panel, a quantum dot light-emitting diode (QLED) display panel, a liquid crystal display (LCD), etc.

[0101] The back cover 20 forms the outer shell of the electronic device 100. The back cover 20 protects the internal electronic components of the electronic device 100. The material of the back cover 20 includes, but is not limited to, metal, ceramic, plastic, and glass. To achieve a thinner and lighter electronic device 100 while maintaining the structural strength of the back cover 20, the material of the back cover 20 can be metal. The back cover 20 includes a back cover 21 and a frame 22. The back cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the back cover 21 and the light-transmitting cover plate 11, and the frame 22 is fixed to the back cover 21. For example, the frame 22 can be fixed to the back cover 21 by adhesive. The frame 22 can also be integrally formed with the back cover 21, i.e., the frame 22 and the back cover 21 are a single integral structure. The light-transmitting cover plate 11 is fixed to the frame 22. In some embodiments, the light-transmitting cover plate 11 can be fixed to the frame 22 by adhesive. The light-transmitting cover 11, the back cover 21, and the frame 22 enclose the internal housing space of the electronic device 100. This internal housing space accommodates the display screen 12, the main circuit board 301, the secondary circuit board 302, the connection structure 303, the battery 40, the USB device 50, and the speaker module 60.

[0102] In some embodiments, please refer to Figure 2 The electronic device 100 also includes a middle plate 30. The middle plate 30 is fixed around the inner surface of the frame 22. For example, the middle plate 30 can be fixed to the frame 22 by welding, or the middle plate 30 can be integrally formed with the frame 22. The middle plate 30 serves as the structural "skeleton" of the electronic device 100, and the main circuit board 301, the secondary circuit board 302, the battery 40, the USB device 50, and the speaker module 60 can be fixed to the middle plate 30 by means of threaded connection, snap-fit, welding, etc.

[0103] When the electronic device 100 does not include the middle board 30, the main circuit board 301, the secondary circuit board 302, the battery 40, the USB device 50 and the speaker module 60 can be fixed to the surface of the display screen 12 facing the back cover 21 by means of threaded connection, snap-fit, welding or other methods, or they can be fixed to the inner surface of the back cover 21 by means of threaded connection, snap-fit, welding or other methods.

[0104] The main circuit board 301 is used to integrate a control chip. The control chip may be, for example, an application processor (AP), double data rate synchronous dynamic random access memory (DDR), or universal flash storage (UFS). In some embodiments, the main circuit board 301 is electrically connected to the display screen 12, and the main circuit board 301 is used to control the display screen 12 to display images or videos.

[0105] The main circuit board 301 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The main circuit board 301 can use an FR-4 dielectric substrate, a Rogers dielectric substrate, or a hybrid dielectric substrate of FR-4 and Rogers, etc. Here, FR-4 is a designation for a flame-retardant material grade, and the Rogers dielectric substrate is a high-frequency board.

[0106] Sub-circuit board 302 is used to integrate electronic components such as antenna (e.g., 5G antenna) RF front end and universal serial bus (USB) devices.

[0107] The secondary circuit board 302 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The secondary circuit board 302 can use FR-4 dielectric substrate, Rogers dielectric substrate, or a hybrid dielectric substrate of FR-4 and Rogers, etc.

[0108] The secondary circuit board 302 is electrically connected to the main circuit board 301 via a connection structure 303 to enable data and signal transmission between the secondary circuit board 302 and the main circuit board 301. The connection structure 303 can be a flexible printed circuit board (FPC). In other embodiments, the connection structure 303 can also be a wire or enameled wire.

[0109] The battery 40 is located between the main circuit board 301 and the sub-circuit board 302. The battery 40 is used to provide power to electronic devices such as the display screen 12, the main circuit board 301, the sub-circuit board 302, and the speaker module 60 within the electronic device 100. In some embodiments, the surface of the middle plate 30 facing the back cover 21 is provided with a battery mounting groove, in which the battery 40 is mounted.

[0110] The USB device 50 is connected to the secondary circuit board 302. The USB device 50 is an interface device compliant with the USB standard specification. Specifically, the USB device 50 can be a Mini USB device, a Micro USB device, a USB Type-C device, etc. The USB device 50 is used to connect a charger to the electronic device 100 via the port 22b on the frame 22 to charge the electronic device 100. It can also be used to transfer data between the electronic device 100 and peripheral devices, and can be used to connect headphones for audio playback. The USB device 50 can also be used to connect other electronic devices 100, such as augmented reality (AR) devices.

[0111] The speaker module 60 is used to convert audio electrical signals such as music and speech into sound, supporting audio playback functionality. In some embodiments, the speaker module 60 is electrically connected to the sub-circuit board 302. In this case, the audio electrical signal sent by the main circuit board 301 is transmitted to the speaker module 60 via the sub-circuit board 302, and further converted into a sound signal for output by the speaker module 60. Specifically, the speaker module 60 has a sound output channel 60a. The sound signal output by the speaker module 60 is output through this sound output channel 60a. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 The frame 22 has a sound outlet 22a. This sound outlet 22a is connected to the sound outlet channel 60a. The sound signal output from the sound outlet channel 60a is further output to the outside of the electronic device 100 through the sound outlet 22a. In other embodiments, the speaker module 60 can also be directly electrically connected to the main circuit board 301 through the connection structure 303 such as FPC, wires, and enameled wires.

[0112] Please see Figure 3 , Figure 3 for Figure 1 A perspective view of a speaker module 60 within the electronic device 100 shown. Figure 4 for Figure 3 The image shows an exploded view of the speaker module 60. In this embodiment, the speaker module 60 includes a housing 61 and a core 62. The core 62 is disposed inside the housing 61, which serves to fix and protect the core 62. The housing 61 is provided with a sound outlet channel 60a, through which the sound generated by the core 62 can be transmitted to the outside of the housing 61.

[0113] It should be noted that, Figure 3 and Figure 4 The speaker module 60 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 3 and Figure 4 The limitations. Additionally... Figure 3 coordinate system and Figure 1 The coordinate systems in the text are represented by the same coordinate system. That is, Figure 3 The various components within the middle speaker module 60 Figure 3 The orientation relationship in the coordinate system shown is related to the application of the speaker module 60. Figure 1 When the electronic device 100 shown is inside, its various components are... Figure 1 The orientation relationships are the same in the coordinate system shown.

[0114] The housing 61 is provided with a fixing part 61a. The fixing part 61a includes, but is not limited to, through holes, threaded holes, snap fasteners, slots, and limiting steps. Figure 3 and Figure 4In the illustrated embodiment, the fixing part 61a includes two through holes. These through holes are used to engage with screws to fix the speaker module 60 to the mounting surface. Figure 1 The electronic device 100 shown is located inside.

[0115] The materials of the housing 61 include, but are not limited to, metal and plastic. In some embodiments, the housing 61 is made of plastic, which is low in cost and easy to mold, thus reducing the processing cost of the speaker module 60.

[0116] The housing 61 can be a single structural unit or assembled from multiple parts. In some embodiments, the housing 61 includes a front housing 611 and a rear housing 612. The housing 61 is assembled from the front housing 611 and the rear housing 612, which helps to reduce the molding and assembly difficulty of the housing 61.

[0117] For details, please refer to Figure 5a , Figure 5b and Figure 5c , Figure 5a for Figure 4 The diagram shows the structure of the inner front housing 611 of the speaker module 60. Figure 5b for Figure 5a The exploded view of the front shell 611 shown. Figure 5c for Figure 5a The diagram shows the front housing 611 viewed from below. The front housing 611 includes a first cover plate 6111 and a first side frame 6112. The first side frame 6112 is arranged around the edge of the first cover plate 6111. One end of the first side frame 6112 is connected to the first cover plate 6111, and the other end extends away from the first cover plate 6111. Please refer to [link / reference]. Figure 5c The first side frame 6112 has a first stepped surface 6112a at the end away from the first cover plate 6111, and the first stepped surface 6112a is arranged around the circumference of the first side frame 6112. The front shell 611 connects with the first stepped surface 6112a. Figure 4 The rear shell 612 is fixed in the middle.

[0118] In some embodiments, please refer to the following: Figure 5a , Figure 5b and Figure 5cThe first cover plate 6111 includes a cover plate body 6111a and a reinforcing plate 6111c. The cover plate body 6111a has an assembly opening 6111b, and the reinforcing plate 6111c is disposed at the assembly opening 6111b and seals the assembly opening 6111b. The cover plate body 6111a can be a plastic part, and the reinforcing plate 6111c can be a metal part. For example, the reinforcing plate 6111c can be a stainless steel part. The reinforcing plate 6111c and the cover plate body 6111a can be an integral structure, that is, the reinforcing plate 6111c and the cover plate body 6111a are formed as a whole. For example, the cover plate body 6111a can be molded onto the reinforcing plate 6111c using an injection molding process. Alternatively, the reinforcing plate 6111c can be disposed at the assembly opening 6111b by adhesive, snap-fit, screws, etc. Therefore, by setting the reinforcing plate 6111c, the overall structural strength of the front shell 611 can be improved without increasing the thickness of the front shell 611. At the same time, by setting the reinforcing plate 6111c, resonance of the first cover plate 6111 can be effectively avoided, which is beneficial to improving the sound quality of the speaker module 60.

[0119] In other embodiments, the first cover plate 6111 may not have an assembly opening 6111b. In this example, the first cover plate 6111 may be a plastic part or a metal part.

[0120] Please see Figure 6 , Figure 6 for Figure 4 The diagram shows the structure of the rear shell 612 within the speaker module 60. The rear shell 612 includes a flat plate portion 6121 and a second side frame 6122. The second side frame 6122 is disposed on the inner surface of the flat plate portion 6121 and is fixed to the first stepped surface 6112a of the front shell 611. The rear shell 612 and the front shell 611 form an accommodating space. This enables the assembly of the front shell 611 and the rear shell 612. This simple structure helps reduce the molding and assembly difficulty of the shell 61. The "inner surface of the flat plate portion 6121" refers to the side surface of the flat plate portion 6121 facing the internal space of the shell 61.

[0121] The kernel 62 is disposed within the aforementioned accommodating space, which is divided into a front cavity 601 and a rear cavity 602. Specifically, the kernel 62 is disposed within the front housing 611. See also... Figure 7 , Figure 7 for Figure 4 The diagram shows the structure of the core 62 in the speaker module 60. The core 62 has a fixing surface 62a, which is formed by the outer edge portion of the diaphragm 6222. The core 62 is fixed to the front shell 611 by means of this fixing surface 62a. (See also...) Figure 8 , Figure 8 for Figure 5cThe enlarged view circled in section A shows that the front shell 611 has a second stepped surface 6112b, the shape and size of which are adapted to the shape and size of the fixing surface 62a. Specifically, the second stepped surface 6112b is disposed on the inner surface of the first side frame 6112. Here, "the inner surface of the first side frame 6112" refers to the surface of the first side frame 6112 facing the interior space of the shell 61. The fixing surface 62a of the core 62 is fixed to the second stepped surface 6112b. Thus, the core 62 can be disposed within the front shell 611, and the core 62 and the front shell 611 can be fixed together.

[0122] Please see Figure 9 , Figure 9 for Figure 4 The diagram shows the assembly of the core 62 and housing 61 in the speaker module 60. Specifically, the core 62 is disposed within the front housing 611, and the core 62 and the first cover plate 6111 of the housing 61 are stacked. The core 62, a portion of the first side frame 6112, and the first cover plate 6111 form a front cavity 601, and the rear housing 612 and a portion of the first side frame 6112 form a rear cavity 602. A sound outlet channel 60a is provided on the first side frame 6112, which communicates with the front cavity 601. The airflow generated in the front cavity 601 of the speaker module 60 can be discharged through the sound outlet channel 60a to generate sound. The sound outlet channel 60a and... Figure 1 The sound outlet 22a on the frame 22 of the electronic device 100 shown is connected.

[0123] Please see Figure 10 and Figure 11 , Figure 10 A perspective view of kernel 62 provided in some embodiments of this application. Figure 11 for Figure 10 The exploded view of the core 62 shown is shown. The core 62 includes a frame 621, a diaphragm assembly 622, a first voice coil 6241, and a magnetic circuit system 623.

[0124] It should be noted that, Figure 10 and Figure 11 The diagram only schematically illustrates some of the components included in the kernel 62; the actual shape, size, location, and construction of these components are not subject to change. Figure 10 and Figure 11 The limitations. Additionally... Figure 10 coordinate system and Figure 3 The coordinate systems in the text are represented by the same coordinate system. That is, Figure 11 The various components within the kernel 62 Figure 11 The orientation relationship in the coordinate system shown is related to the position of the kernel 62 when it is applied to the system. Figure 3 When the speaker module 60 shown is inside, its various components are in Figure 3 The orientation relationships are the same in the coordinate system shown.

[0125] It is understood that the terms "top" and "bottom" used in the following description of the components in the core 62 refer to the part of the component near the front cavity 601 when the core 62 is applied within the speaker module 60, "inner" refers to the part of the component away from the front cavity 601 when the core 62 is applied within the speaker module 60, "outer" refers to the part of the component near the central axis of the core 62, and "outer" refers to the part of the component away from the central axis of the core 62. These terms do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "rectangular" and "square" used in the following description of the shapes of the components in the core 62 indicate approximate shapes; rounded corners may or may not be provided between adjacent sides. Moreover, the directional relation qualifiers such as "parallel," "perpendicular," "consistent in direction," "same direction," and "opposite direction" used in the following description of the components in the core 62 indicate approximate orientations with a certain margin of error.

[0126] The frame 621 serves as a "support skeleton" for the core 62, supporting the diaphragm assembly 622 and securing the magnetic circuit system 623. The frame 621 may be made of materials including, but not limited to, metal and plastic.

[0127] Please see Figure 12 , Figure 12 for Figure 11 The diagram shows a perspective view of the basin frame 621 within the core 62. The basin frame 621 is a rectangular frame. Specifically, the basin frame 621 includes opposing first short sides 621a and second short sides 621b, and opposing first long sides 621c and second long sides 621d. The extending directions of the first long sides 621c and second long sides 621d are parallel to the X-axis, while the extending directions of the first short sides 621a and second short sides 621b are parallel to the Y-axis. The lengths of the first long sides 621c and second long sides 621d are greater than the lengths of the first short sides 621a and second short sides 621b. The basin frame 621 is formed by sequentially connecting and enclosing the first short sides 621a, the first long sides 621c, the second short sides 621b, and the second long sides 621d.

[0128] The basin frame 621 can be a single structural component or assembled from multiple parts through methods such as bonding, snap-fitting, or threaded connection. It is understood that the basin frame 621 is used to support the diaphragm assembly 622 and fix the magnetic circuit system 623. While meeting this requirement, the basin frame 621 can also have other design shapes, not limited to this embodiment.

[0129] Please see Figure 13 , Figure 14 and Figure 15 , Figure 13 for Figure 11A schematic diagram of one structure of the diaphragm assembly 622 in the core 62 shown. Figure 14 for Figure 13 The diaphragm assembly 622 shown is a three-dimensional sectional view at line AA. Figure 15 for Figure 14 The enlarged view of region B in the sectional view shown is shown below. It should be noted that "at line AA" refers to the plane containing line AA and the arrows at both ends of line AA. The same understanding should be applied to similar figures in the following text, and will not be repeated here.

[0130] The diaphragm assembly 622 is the main component that drives the air movement within the front cavity 601 of the speaker module 60. Figure 11 The kernel 62 shown is applied to Figure 3-4 When the speaker module 60 is installed, the core 62 separates the rear cavity 602 and the front cavity 601 of the speaker module 60 by means of the diaphragm assembly 622. That is, the diaphragm assembly 622 divides the housing 61 into the front cavity 601 and the rear cavity 602. The diaphragm assembly 622 is opposite to the first cover plate 6111. That is, the orthographic projection of the diaphragm assembly 622 onto the first cover plate 6111 overlaps with the first cover plate 6111. The front cavity 601 is defined between the diaphragm assembly 622 and the first cover plate 6111 of the housing 61.

[0131] Please see Figure 13 The diaphragm assembly 622 includes a dome 6221 and a diaphragm 6222. The dome 6221 is rectangular in shape. The length direction of the dome 6221 is parallel to the X-axis, the width direction is parallel to the Y-axis, and the thickness direction is parallel to the Z-axis. Please refer to [link / reference]. Figure 14 and Figure 15 The dome 6221 includes a first top surface 6221a and a first bottom surface 6221b disposed opposite to each other. A limiting groove 6221c is provided in the edge region of the first bottom surface 6221b. In other embodiments, the limiting groove 6221c of the dome 6221 may also be provided in the edge region of the first top surface 6221a of the dome 6221.

[0132] Please continue reading. Figure 13 The diaphragm 6222 is rectangular and ring-shaped. It surrounds the edge of the dome 6221, with its long side extending parallel to the X-axis and its short side extending parallel to the Y-axis. The diaphragm 6222 includes a first fixing part 6222a, a surround 6222b, and a second fixing part 6222c connected in sequence. The first fixing part 6222a is located inside the surround 6222b, and the second fixing part 6222c is located outside the surround 6222b. It is understood that a portion of the diaphragm 6222 protrudes away from the first voice coil 6241 to form the aforementioned surround 6222b.

[0133] Please see Figure 14 andFigure 15 The first fixing part 6222a is partially received in the limiting groove 6221c of the dome 6221 and fixed to the dome 6221. Based on this, the first fixing part 6222a of the diaphragm 6222 has a second top surface 6222a1 and a second bottom surface 6222a2. The second top surface 6222a1 of the first fixing part 6222a contacts the bottom wall of the limiting groove 6221c, and the second bottom surface 6222a2 of the first fixing part 6222a is flush with the first bottom surface 6221b of the dome 6221. The surface formed by the splicing of the second bottom surface 6222a2 of the first fixing part 6222a and the first bottom surface 6221b of the dome 6221 is used to fix the first voice coil 6241, thereby facilitating the fixation of the first voice coil 6241.

[0134] Please see Figure 14 The second fixing part 6222c has a third top surface 6222c1 and a third bottom surface 6222c2 facing each other. The third top surface 6222c1 of the second fixing part 6222c is formed Figure 7 The core 62 is shown as having a fixed surface 62a. When the core 62 is installed inside the speaker module 60, the diaphragm assembly 622 is fixed to the inner surface of the front shell 611 of the speaker module 60 by means of the third top surface 6222c1 of the second fixing part 6222c. The third bottom surface 6222c2 of the second fixing part 6222c is used for... Figure 12 The top surface of the basin stand 621 shown is fixed.

[0135] The cross-sectional shape of the surround 6222b of the diaphragm 6222 is arc-shaped or approximately arc-shaped, and the extension trajectory of the surround 6222b is a rounded rectangle. The long side of the extension trajectory of the surround 6222b extends parallel to the X-axis, and the short side extends parallel to the Y-axis. The surround 6222b of the diaphragm 6222 is convex, that is, the surround 6222b protrudes away from the first voice coil 6241. When the surround 6222b of the diaphragm 6222 is subjected to external force, it can deform, allowing the dome 6221 to vibrate up and down in the Z-axis direction relative to the second fixed part 6222c.

[0136] In this embodiment, since the fold ring 6222b of the diaphragm 6222 is convex, the space below the diaphragm 6222 is freed up, allowing the magnetic circuit system 623 located below the diaphragm 6222 to have a larger height dimension, thereby increasing the magnetic induction intensity of the core 62 and improving the sensitivity of the core 62.

[0137] It is understood that in other embodiments, the surround 6222b of the diaphragm 6222 may also be recessed, that is, the surround 6222b is recessed towards the side facing the first voice coil 6241. In this way, the core 62 can save its upper space, thereby saving space in the front cavity 601.

[0138] Please see Figure 16 and Figure 17 , Figure 16 for Figure 13 The diaphragm assembly 622 shown is... Figure 12 The assembly drawing of the basin stand 621 shown is shown. Figure 17 for Figure 16 The assembly diagram shown is a perspective sectional view at line BB. In the diaphragm assembly 622, the third bottom surface 6222c2 of the second fixing part 6222c of the diaphragm 6222 faces the frame 621 and is fixed to the top surface of the frame 621.

[0139] Please see Figure 18 and Figure 19 , Figure 18 for Figure 11 The diagram shows a 3D view of the first voice coil 6241 in the core 62. Figure 19 for Figure 18 The first voice coil 6241 shown in the figure is... Figure 12 The basin stand 621 shown is Figure 13 The diagram shows the assembly structure of the diaphragm assembly 622. The first voice coil 6241 is rectangular. The extension directions of the two adjacent sides of the first voice coil 6241 are aligned with the X-axis and Y-axis directions, respectively. The first voice coil 6241 is used in conjunction with the magnetic circuit system 623 to drive the diaphragm assembly 622 to vibrate, thereby pushing the air in the front cavity 601 of the speaker module 60 to generate sound.

[0140] The first voice coil 6241 has a top surface and a bottom surface. The end with the top surface of the first voice coil 6241 is used to fix it to the dome 6221 of the diaphragm assembly 622, and the end with the bottom surface of the first voice coil 6241 is used to extend into the magnetic circuit system 623 to cooperate with the magnetic circuit system 623.

[0141] The first voice coil 6241 can be electrically connected to the internal circuitry of the electronic device 100 via a flexible electrical connection structure. For example, the first voice coil 6241 can be electrically connected to the main circuit board 301 or the sub-circuit board 302 of the electronic device 100 via the flexible electrical connection structure. The flexible electrical connection structure can be a flexible circuit board, a wire, etc., and this application does not specifically limit its application to this type of connection.

[0142] Please return to the reference. Figure 11 The magnetic circuit system 623 is fixed to the frame 621 and is located in the rear cavity 602. The magnetic circuit system 623 is used to cooperate with the first voice coil 6241 to drive the diaphragm assembly 622 to vibrate. (See also...) Figure 20 and Figure 21 , Figure 20 for Figure 11 The diagram shows the structure of the magnetic circuit system 623 in the core 62. Figure 21 for Figure 20The exploded view of the magnetic circuit system 623 is shown. The magnetic circuit system 623 includes a central magnet 6231 and side magnets 6232.

[0143] Please see Figure 21 The lateral magnet 6232 is arranged circumferentially around the central magnet 6231, and a magnetic gap 623a is defined between the central magnet 6231 and the lateral magnet 6232. (See also...) Figure 22 , Figure 22 For along Figure 10 A cross-sectional view along the CC line. The portion of the first voice coil 6241 furthest from the diaphragm assembly 622 extends into the magnetic gap 623a. It is understood that in other embodiments, when the first voice coil 6241 is a planar voice coil, the first voice coil 6241 may not extend into the aforementioned magnetic gap 623a.

[0144] The central magnet 6231 can be a magnet or a steel magnet. Similarly, the side magnet 6232 can also be a magnet or a steel magnet. The magnetization direction of the central magnet 6231 (from the south pole to the north pole, i.e., from the S pole to the N pole) is opposite to the magnetization direction of the side magnet 6232. For an example, please refer to [link to example]. Figure 22 The central magnet 6231 has an N pole at the end closest to the diaphragm assembly 622 and an S pole at the end furthest from the diaphragm assembly 622. Similarly, the side magnet 6232 has an S pole at the end closest to the diaphragm assembly 622 and an N pole at the end furthest from the diaphragm assembly 622. This creates a magnetic circuit between the central magnet 6231 and the side magnet 6232. When the first voice coil 6241 is energized, it drives the diaphragm assembly 622 to vibrate under the influence of the magnetic field within the magnetic gap 623a.

[0145] Please see Figure 21 The central magnet 6231 forms a rectangular flat plate structure. The length direction of the central magnet 6231 is parallel to the X-axis, the width direction of the central magnet 6231 is parallel to the Y-axis, and the thickness direction of the central magnet 6231 is parallel to the Z-axis.

[0146] The number of side magnets 6232 can be one or more. When there are multiple side magnets 6232, they are evenly arranged around the central magnet 6231 in a circumferential manner. For an example, please refer to [link to example]. Figure 21The number of side magnets 6232 is four. Specifically, the side magnets 6232 include a first side magnet 6232a, a second side magnet 6232b, a third side magnet 6232c, and a fourth side magnet 6232d. The first side magnet 6232a and the second side magnet 6232b are located on opposite sides of the central magnet 6231 along its length, while the third side magnet 6232c and the fourth side magnet 6232d are located on opposite sides of the central magnet 6231 along its width. The first side magnet 6232a and the second side magnet 6232b can be formed in an "H" shape, while the third side magnet 6232c and the fourth side magnet 6232d can be formed in a long strip shape.

[0147] In other embodiments, the side magnet 6232 may also be formed as a ring magnet arranged around the central magnet 6231, without specific limitation.

[0148] Based on the above embodiments, in order to increase the magnetic flux intensity, please refer to some embodiments as well. Figure 20 , Figure 21 and Figure 22 The magnetic circuit system 623 also includes a central magnetic yoke 6233 and an edge magnetic yoke 6234. The central magnetic yoke 6233 and the edge magnetic yoke 6234 are used to constrain the outward diffusion of leakage magnetic flux from the induction coil. Their material can be a yoke iron made of stacked silicon steel sheets. The central magnetic yoke 6233 is formed into a rectangular flat plate structure, and the edge magnetic yoke 6234 is formed into a ring-shaped flat plate structure. The central magnetic yoke 6233 is mounted on the surface of the central magnet 6231 near the diaphragm assembly 622 by means of adhesive bonding, snap-fitting, or threaded connection, and the edge magnetic yoke 6234 is mounted on the surface of the edge magnet 6232 near the diaphragm assembly 622 by means of adhesive bonding, snap-fitting, or threaded connection. In this way, by constraining the magnetic lines of force through the central magnetic yoke 6233 and the edge magnetic yoke 6234, the magnetic flux intensity within the aforementioned magnetic gap 623a can be increased, thereby improving the driving strength of the diaphragm assembly 622.

[0149] It is understood that in some other embodiments, the magnetic circuit system 623 may also not include the central magnetic yoke 6233, the edge magnetic yoke 6234, and the edge magnetic yoke 6234.

[0150] Furthermore, the core 62 also includes a lower magnetic yoke 6235, which is located on the surface of the central magnet 6231 and the side magnet 6232 away from the diaphragm assembly 622. The central magnet 6231 and the side magnet 6232 can be fixed to the lower magnetic yoke 6235 by means of adhesive, snap-fit, threaded connection, etc.

[0151] The lower magnetic yoke 6235 can be made of stacked silicon steel sheets. The lower magnetic yoke 6235 can constrain the magnetic lines of force of the central magnet 6231 and the side magnets 6232, thereby further increasing the magnetic flux intensity within the magnetic gap 623a between the central magnet 6231 and the side magnets 6232, and improving the driving strength of the diaphragm assembly 622. Simultaneously, the lower magnetic yoke 6235 can be used to fix the relative positions of the central magnet 6231 and the side magnets 6232 in the magnetic circuit system 623. Thus, by setting the lower magnetic yoke 6235, the various components of the magnetic circuit system 623 can be integrated into a single unit, allowing for overall assembly of the magnetic circuit system 623, which helps reduce assembly difficulty and improve assembly efficiency.

[0152] Please see Figure 23 , Figure 23 for Figure 20 The magnetic circuit system 623 shown in the figure and Figure 12 The diagram shows the assembly of the basin frame 621. The side surface of the edge magnetic yoke 6234 away from the edge magnet 6232 is connected to the bottom surfaces of the first long side portion 621c and the second long side portion 621d of the basin frame 621. Specifically, the bottom surface of the first long side portion 621c has a first notch 6211c, and the bottom surface of the second long side portion 621d has a second notch 6211d. The edge magnetic yoke 6234 is connected at the first notch 6211c and the second notch 6211d.

[0153] To improve kernel 62 sensitivity, please refer to Figure 24 and Figure 25 , Figure 24 A perspective view of kernel 62 for some other embodiments provided in this application. Figure 25 For along Figure 24 A cross-sectional view along the DD line. In this embodiment, the kernel 62, in addition to including... Figure 11 In addition to the diaphragm assembly 622, the first voice coil 6241, and the magnetic circuit system 623 shown in the diagram, the core 62 also includes a second voice coil 6242. The second voice coil 6242 is fixed to the diaphragm assembly 622, and the second voice coil 6242 and the first voice coil 6241 are located on opposite sides of the diaphragm assembly 622. Specifically, the first voice coil 6241 is fixed to the surface of the diaphragm assembly 622 facing the magnetic circuit system 623, and the second voice coil 6242 is fixed to the surface of the diaphragm assembly 622 facing away from the magnetic circuit system 623. For example, the first voice coil 6241 is glued to the surface of the diaphragm assembly 622 facing the magnetic circuit system 623, and the second voice coil 6242 is glued to the surface of the diaphragm assembly 622 facing away from the magnetic circuit system 623.

[0154] The second voice coil 6242 is used in conjunction with the magnetic circuit system 623 to drive the diaphragm assembly 622 to vibrate. Specifically, the second voice coil 6242 vibrates under the influence of the magnetic field of the magnetic circuit system 623. For an example, please refer to [link to example]. Figure 26 , Figure 26 This is a schematic diagram of the magnetic field of the second voice coil 6242. The magnetic field lines radiating outward from the central magnet 6231 and the edge magnet 6232 can form a magnetic field acting on the second voice coil 6242. Of course, it is understood that in other embodiments, the magnetic field lines radiating outward from either the central magnet 6231 or the edge magnet 6232 can also form a magnetic field acting on the second voice coil 6242.

[0155] In this way, both the first voice coil 6241 and the second voice coil 6242 cooperate with the magnetic circuit system 623 to synchronously drive the diaphragm assembly 622 to vibrate. The design of two voice coils allows for a longer winding length. Due to the increased winding length L, the corresponding electrical transduction coefficient BL is larger, resulting in a greater driving force BLI for the speaker module 60, thus improving its low-frequency performance. Simultaneously, the second voice coil 6242 increases the rigidity of the diaphragm assembly 622, which is beneficial for improving the high-frequency performance of the core 62. Therefore, a high-frequency speaker module 60 is not required within the electronic device 100, simplifying its structure. Furthermore, placing the second voice coil 6242 on the surface of the diaphragm assembly 622 facing away from the magnetic circuit system 623 allows the magnetic lines of force emanating outwards from the central magnet 6231 and / or the side magnet 6232 to act on the second voice coil 6242 without altering the structure of the original magnetic circuit system 623, thus reducing the production cost of the core 62.

[0156] In some embodiments, the central axis of the first voice coil 6241 coincides with the central axis of the second voice coil 6242. That is, the first voice coil 6241 and the second voice coil 6242 are coaxially arranged. This avoids segmented vibration during the vibration of the diaphragm assembly 622, thereby improving the audio performance of the core 62.

[0157] Based on this, in some embodiments, the second voice coil 6242 covers at least a portion of the orthographic projection of the magnetic gap 623a onto the dome 6221. Specifically, a portion of the orthographic projection of the magnetic gap 623a onto the dome 6221 is covered by the second voice coil 6242, or the entire orthographic projection of the magnetic gap 623a onto the dome 6221 is covered by the second voice coil 6242. This allows the second voice coil 6242 to be closer to the region where the magnetic gap 623a is located, which helps to increase the magnetic field strength acting on the second voice coil 6242, thereby increasing the driving force acting on the diaphragm assembly 622.

[0158] In some embodiments, the thickness of the second voice coil 6242 is less than or equal to the height of the surround 6222b of the diaphragm assembly 622. Here, "thickness of the second voice coil 6242" refers to its dimension in the Z-axis direction, and "height of the surround 6222b" refers to its dimension in the Z-axis direction. This allows for an increase in the driving force of the diaphragm assembly 622 while maintaining the same thickness of the core 62, thereby improving the audio performance of the core 62 while achieving a thinner design.

[0159] Please return to the reference. Figure 24 In some embodiments, the second voice coil 6242 is a planar voice coil. The second voice coil 6242 can be bonded to the dome 6221. The planar voice coil has a smaller thickness, which helps to reduce the thickness of the core 62, thereby achieving a thinner design for the core 62. Simultaneously, setting the second voice coil 6242 as a planar voice coil also allows for a reduction in the weight of the second voice coil 6242 while maintaining its winding length, thus reducing the vibration resistance of the diaphragm assembly 622 and improving the audio performance of the core 62. Therefore, the core 62 provided in this application can, to a certain extent, balance thinness and audio performance.

[0160] Furthermore, by setting the second voice coil 6242 as a planar voice coil, the contact area between the second voice coil 6242 and the dome 6221 can be increased, which is beneficial to increasing the rigidity of the diaphragm assembly 622 and improving the high-frequency performance of the core 62. As a result, there is no need to set a high-frequency speaker module 60 in the electronic device 100, which simplifies the structure of the electronic device 100.

[0161] In some alternative embodiments, please refer to Figure 24 The second voice coil 6242 is ring-shaped. This further reduces the weight of the second voice coil 6242, thereby further improving the audio performance of the core 62.

[0162] In some embodiments, the second voice coil 6242 is wound with copper-aluminum alloy wire. The second voice coil 6242 can have one or more layers (i.e., two or more layers). Copper-aluminum alloy has a low density; using copper-aluminum alloy wire to wind the second voice coil 6242 can reduce its weight, thereby improving the audio performance of the core 62. Simultaneously, the process of forming the coil by winding wire is simple, which helps reduce manufacturing costs.

[0163] Optionally, the conductor is enameled wire. Enameled wire has good shaping ability, which helps to reduce the difficulty of winding the coil.

[0164] It is understood that in other embodiments, the second voice coil 6242 may also be fabricated by means of printed circuits.

[0165] Please continue reading. Figure 24 The diaphragm assembly 622 has a positive conductive layer 6222d and a negative conductive layer 6222e on its side facing away from the magnetic circuit system 623, with the positive conductive layer 6222d and the negative conductive layer 6222e spaced apart. The positive terminal of the second voice coil 6242 is electrically connected to the positive conductive layer 6222d, and the negative terminal of the second voice coil 6242 is electrically connected to the negative conductive layer 6222e.

[0166] For example, please refer to Figure 24 The second voice coil 6242 has an inner end m and an outer end n. The inner end m of the second voice coil 6242 can form the positive terminal of the second voice coil 6242, and the outer end n of the second voice coil 6242 can form the negative terminal of the second voice coil 6242. The positive terminal of the second voice coil 6242 can be soldered to the positive conductive layer 6222d, or bonded to the positive conductive layer 6222d with conductive adhesive. Similarly, the negative terminal of the second voice coil 6242 can be soldered to the negative conductive layer 6222e, or bonded to the negative conductive layer 6222e with conductive adhesive. In this way, by connecting the positive and negative terminals of the second voice coil 6242 to the positive conductive layer 6222d and the negative conductive layer 6222e of the diaphragm assembly 622, respectively, the positive and negative terminals of the second voice coil 6242 can vibrate synchronously with the diaphragm assembly 622, avoiding the breakage of the positive and negative terminals of the second voice coil 6242 during vibration and improving the reliability of the core 62.

[0167] Based on this, in order to facilitate the electrical connection between the positive conductive layer 6222d and the positive terminal of the second voice coil 6242, and the negative conductive layer 6222e and the negative terminal of the second voice coil 6242, the positive projection of the positive terminal of the second voice coil 6242 on the dome 6221 is located on the positive conductive layer 6222d, and the positive projection of the negative terminal of the second voice coil 6242 on the dome 6221 is located on the negative conductive layer 6222e.

[0168] For further details, please refer to Figure 24 The positive conductive layer 6222d extends to the outer edge of the diaphragm assembly 622, and the negative conductive layer 6222e extends to the outer edge of the diaphragm assembly 622. This reduces the difficulty of electrical connection between the positive conductive layer 6222d, the negative conductive layer 6222e and the internal circuit of the electronic device 100, which is beneficial to improving assembly efficiency.

[0169] For example, the positive conductive layer 6222d can be electrically connected to the main circuit board 301 or the sub-circuit board 302 of the electronic device 100 via wires, flexible circuit boards, conductive sheets, etc., to achieve electrical connection between the positive conductive layer 6222d and the internal circuitry of the electronic device 100. The negative conductive layer 6222e can be electrically connected to the main circuit board 301 or the sub-circuit board 302 of the electronic device 100 via wires, flexible circuit boards, conductive sheets, etc., to achieve electrical connection between the positive conductive layer 6222d and the internal circuitry of the electronic device 100.

[0170] In some embodiments, a positive conductive layer 6222d and a negative conductive layer 6222e are coated on the diaphragm assembly 622. The process is simple and easy to manufacture.

[0171] In some embodiments, the first voice coil 6241 and the second voice coil 6242 are connected in series. Specifically, after the first voice coil 6241 and the second voice coil 6242 are connected in series, they are connected to the positive and negative terminals of the power supply. In this embodiment, the first voice coil 6241 and the second voice coil 6242 are connected to the power supply through a single current path. Specifically, the current flowing from the positive terminal of the power supply flows sequentially through the first voice coil 6241 and the second voice coil 6242 (or sequentially through the second voice coil 6242 and the first voice coil 6241) and then flows back to the negative terminal of the power supply. In this way, after the electronic device 100 receives a drive signal, the first voice coil 6241 and the second voice coil 6242 operate simultaneously, which can increase the driving force acting on the diaphragm assembly 622, thereby improving the external loudness of the core 62.

[0172] In other embodiments, the first voice coil 6241 and the second voice coil 6242 are connected in parallel. Specifically, the first voice coil 6241 and the second voice coil 6242 are respectively connected to the positive and negative terminals of the power supply. The current flowing from the positive terminal of the power supply is divided into two paths. The first path flows to the positive terminal of the first voice coil 6241 and returns to the negative terminal of the power supply via the negative terminal of the first voice coil 6241. The second path flows to the positive terminal of the second voice coil 6242 and returns to the negative terminal of the power supply via the negative terminal of the second voice coil 6242. In this way, on the one hand, the driving force acting on the diaphragm assembly 622 can be increased, and on the other hand, when the first voice coil 6241 is energized to drive the diaphragm assembly 622 to vibrate, the second voice coil 6242 vibrates with the diaphragm assembly 622 and generates current. This current flows back to the power supply. The electronic device 100 can determine the position of the diaphragm assembly 622 by detecting the current generated by the second voice coil 6242. In this way, the electronic device 100 can control the amplitude of the diaphragm assembly 622, perform amplitude protection, and reduce noise.

[0173] Based on the above embodiments, in order to further improve the driving force of the diaphragm assembly 622, please refer to... Figure 27 and Figure 28 , Figure 27 This is a perspective view of a speaker module 60 according to other embodiments of this application. Figure 28 for Figure 27 The speaker module 60 shown is a cross-sectional view. In this embodiment, the speaker module 60 includes, in addition to... Figure 3 The housing 61 of the speaker module 60 shown Figure 24In addition to the core 62 shown, a first auxiliary magnet 6238 is also included. The first auxiliary magnet 6238 can be a magnet or a steel magnet. The first auxiliary magnet 6238 is located on the side of the diaphragm assembly 622 away from the magnetic circuit system 623. The first auxiliary magnet 6238 is spaced apart from the diaphragm assembly 622 to avoid interfering with the movement of the diaphragm assembly 622. The first auxiliary magnet 6238 can be located inside or outside the housing 61. When the first auxiliary magnet 6238 is located inside the housing 61, it can be disposed on the inner surface of the housing 61. When the first auxiliary magnet 6238 is located outside the housing 61, it can be disposed on the outer surface of the housing 61, or on the middle plate 30 or the outer casing of the electronic device 100.

[0174] Please see Figure 27 The first auxiliary magnet 6238 can be formed into a rectangular plate structure. Of course, the shape of the first auxiliary magnet 6238 is not limited to this. In other embodiments, the first auxiliary magnet 6238 can also be formed into a rectangular ring structure, etc.

[0175] The projection of the first auxiliary magnet 6238 onto the diaphragm assembly 622 along the central axis O is called the first projection, and the projection of the second voice coil 6242 onto the diaphragm assembly 622 along the central axis O is called the second projection. The central axis O of the diaphragm assembly 622 refers to a straight line passing through the center of the diaphragm assembly 622 and perpendicular to the plane containing the dome 6221 of the diaphragm assembly 622. The first projection can be the orthographic projection of the first auxiliary magnet 6238 onto the plane containing the dome 6221. The second projection can be the orthographic projection of the second voice coil 6242 onto the plane containing the dome 6221.

[0176] For example, please refer to Figure 29 , Figure 29 This is a schematic diagram of the projection of the first auxiliary magnet 6238 onto the diaphragm assembly 622 along the central axis O. The projection lines n of each point on the first auxiliary magnet 6238 are all parallel to the central axis O of the diaphragm assembly 622. The projection process of the second projection, as well as the first, second, and fifth projections mentioned below, is similar to that of the first projection and will not be described again here.

[0177] Specifically, the first projection and the second projection overlap. That is, the first projection and the second projection have an overlapping area. The first projection and the second projection can partially overlap or completely overlap. This ensures that the second voice coil 6242 is within the magnetic field of the first auxiliary magnet 6238, thereby increasing the magnetic field strength of the magnetic field used to cooperate with the second voice coil 6242, improving the driving force of the diaphragm assembly 622, and thus improving the sensitivity of the speaker module 60.

[0178] When the first projection and the second projection partially overlap, there are three possible scenarios: First, the first and second projections intersect, with a portion of the first projection coinciding with a portion of the second projection, while another portion of the first projection does not coincide with another portion of the second projection. Second, the outer contour line of the first projection lies within the outer contour line of the second projection, meaning the first projection is contained within the second projection; in this case, the area of ​​the second projection is larger than the area of ​​the first projection. Third, the outer contour line of the second projection lies within the outer contour line of the first projection, meaning the second projection can be contained within the first projection; in this case, the area of ​​the second projection is smaller than the area of ​​the first projection.

[0179] When the first projection and the second projection completely overlap, their outer contours completely coincide. At this time, the area of ​​the first projection is equal to the area of ​​the second projection. It should be noted that the phrase "the first projection and the second projection completely overlap" in this application should be interpreted broadly. That is, a strict overlap is not required. Due to manufacturing errors, if the area of ​​the first projection is slightly larger or slightly smaller than the area of ​​the second projection, it can still be considered as a complete overlap.

[0180] For example, the first projection and the second projection completely overlap, or the second projection is contained within the first projection. That is, the second projection is completely covered by the first projection, and the overlapping area of ​​the second projection and the first projection is the second projection. In this way, the magnetic field strength of the magnetic field cooperating with the second voice coil 6242 can be further increased, thereby improving the total driving force of the diaphragm assembly 622.

[0181] In some embodiments, the projection of the central magnet 6231 along the central axis O of the diaphragm assembly 622 onto the diaphragm assembly 622 is a third projection, which overlaps with the first projection. That is, the third projection and the first projection have an overlapping area. The third projection and the first projection can partially overlap or completely overlap. This facilitates the cooperation between the first auxiliary magnet 6238 and the central magnet 6231, thereby improving the magnetic field strength of the magnetic field system.

[0182] When the first and third projections partially overlap, there are three possible scenarios: First, the first and third projections intersect, with a portion of the first projection coinciding with a portion of the third projection, while another portion of the first projection does not coincide with another portion of the third projection. Second, the outer contour line of the first projection lies within the outer contour line of the third projection, meaning the first projection is contained within the third projection; in this case, the area of ​​the third projection is larger than the area of ​​the first projection. Third, the outer contour line of the third projection lies within the outer contour line of the first projection, meaning the third projection can be contained within the first projection; in this case, the area of ​​the third projection is smaller than the area of ​​the first projection.

[0183] When the first projection and the third projection completely overlap, their outer contours completely coincide. In this case, the area of ​​the first projection is equal to the area of ​​the third projection. It should be noted that the phrase "the first projection and the third projection completely overlap" in this application should be interpreted broadly. That is, a strict overlap is not required. Due to manufacturing errors, if the area of ​​the first projection is slightly larger or slightly smaller than the area of ​​the third projection, it can still be considered as a complete overlap.

[0184] In some embodiments, the magnetic pole of the first auxiliary magnet 6238 near the central magnet 6231 is opposite to the magnetic pole of the central magnet 6231 near the first auxiliary magnet 6238, and the magnetic pole of the first auxiliary magnet 6238 away from the central magnet 6231 is the same as the magnetic pole of the central magnet 6231 near the first auxiliary magnet 6238. For example, please refer to... Figure 28 The central magnet 6231 has an N pole at the end closest to the first auxiliary magnet 6238 and an S pole at the end furthest from the first auxiliary magnet 6238. Similarly, the first auxiliary magnet 6238 has an S pole at the end closest to the central magnet 6231 and an N pole at the end furthest from the central magnet 6231. This mutual attraction between the central magnet 6231 and the first auxiliary magnet 6238 helps to increase the magnetic field strength of the second voice coil 6242, thereby increasing the driving force of the diaphragm assembly 622 and improving the sensitivity of the speaker module 60.

[0185] In other embodiments, the magnetic pole of the first auxiliary magnet 6238 near the central magnet 6231 is the same as the magnetic pole of the central magnet 6231 near the first auxiliary magnet 6238, and the magnetic pole of the first auxiliary magnet 6238 away from the central magnet 6231 is opposite to the magnetic pole of the central magnet 6231 near the first auxiliary magnet 6238. For example, please refer to... Figure 30 The end of the central magnet 6231 closest to the first auxiliary magnet 6238 is the N pole, and the end furthest from the first auxiliary magnet 6238 is the S pole. The end of the first auxiliary magnet 6238 closest to the central magnet 6231 is the N pole, and the end furthest from the central magnet 6231 is the S pole.

[0186] In this way, the first auxiliary magnet 6238 and the central magnet 6231 repel each other, and the magnetic field lines of the first auxiliary magnet 6238 and the magnetic field lines of the central magnet 6231 inhibit each other, effectively suppressing the outward divergence of the magnetic field lines of the central magnet 6231. This effectively increases the magnetic flux density in the magnetic gap 623a, increases the magnetic field strength in the magnetic gap 623a, and improves the driving force of the first voice coil 6241, thereby improving the sensitivity of the speaker module 60 and the acoustic performance of the speaker module 60.

[0187] Furthermore, in the above embodiments, since the first auxiliary magnet 6238 is located on the side of the diaphragm assembly 622 away from the magnetic circuit system 623, the overall volume of the magnetic circuit system 623 will not be increased while the magnetic field strength is improved. This is conducive to realizing the miniaturization design of the speaker module 60. Moreover, in the production process, there is no need to change the original structure of the magnetic circuit system 623 and the core 62 of the speaker module 60, which effectively reduces the production cost.

[0188] In some embodiments, please continue reading Figure 30 The first auxiliary magnet 6238 is disposed on the first cover plate 6111. The first auxiliary magnet 6238 may be disposed on the inner surface of the first cover plate 6111 or on the outer surface of the first cover plate 6111.

[0189] For example, please refer to Figure 30 The first auxiliary magnet 6238 can be disposed on the outer surface of the reinforcing plate 6111c of the first cover plate 6111. The first auxiliary magnet 6238 can be disposed on the outer surface of the reinforcing plate 6111c by means of adhesive, snap-fit, or other methods. This facilitates the fixing of the first auxiliary magnet 6238 and avoids the first auxiliary magnet 6238 occupying the space of the front cavity 601, thereby saving space in the front cavity 601 and improving the sensitivity of the speaker module 60.

[0190] In other embodiments, please refer to Figure 31 The first auxiliary magnet 6238 can also be disposed on the inner surface of the reinforcing plate 6111c. This also facilitates the fixation of the first auxiliary magnet 6238, ensuring its stable position and reducing the size of the speaker module 60 in the Z-axis direction. Furthermore, the first auxiliary magnet 6238 disposed on the inner surface of the reinforcing plate 6111c can limit the vibration stroke of the diaphragm assembly 622, preventing the first voice coil 6241 from slipping out of the magnetic gap 623a.

[0191] In other embodiments, the first auxiliary magnet 6238 may also be disposed on the middle plate 30 or the outer casing of the electronic device 100. In this way, the space within the electronic device 100 can be utilized to arrange the first auxiliary magnet 6238, which is beneficial for achieving a thinner and lighter design of the electronic device 100.

[0192] Based on the above embodiments, in order to reduce the overall size of the speaker module 60 and save the overall space occupied by the speaker module 60, in some embodiments, please refer to... Figure 32 and Figure 33 , Figure 32 A perspective view of a speaker module 60 provided in some embodiments of this application. Figure 33 for Figure 32The image shows a cross-sectional view of the speaker module 60. In this embodiment, the outer surface of the first cover plate 6111 is provided with a groove 6111d that is recessed toward the diaphragm assembly 622, and the first auxiliary magnet 6238 is disposed in the groove 6111d.

[0193] In some embodiments, please refer to Figure 32 and Figure 33 A portion of the first cover plate 6111 is recessed inward to form a groove 6111d, and a first auxiliary magnet 6238 is disposed within the groove 6111d. Specifically, the first auxiliary magnet 6238 can be adhered to the bottom wall of the groove 6111d. Here, the "bottom wall of the groove 6111d" refers to the side wall opposite the open opening of the groove 6111d. This reduces the size of the speaker module 60 in the Z-axis direction, decreases the overall volume of the speaker module 60, and simplifies the structure and facilitates manufacturing. Furthermore, since a portion of the first cover plate 6111 is recessed inward, this recessed portion can limit the vibration stroke of the diaphragm assembly 622, preventing the first voice coil 6241 from slipping out of the magnetic gap 623a.

[0194] For example, please refer to Figure 32 and Figure 33 The groove 6111d is formed by a portion of the reinforcing plate 6111c being recessed inward.

[0195] For further details, please refer to Figure 34 , Figure 34 A cross-sectional view of a speaker module 60 provided in some embodiments of this application. This embodiment is related to... Figure 34 The difference in the speaker module 60 shown is that, in this embodiment, the bottom wall of the groove 6111d is provided with a hollow portion 6111e, and the orthographic projection of the first auxiliary magnet 6238 on the bottom wall of the groove 6111d covers the hollow portion 6111e. In this way, at least a part of the surface of the first auxiliary magnet 6238 can be exposed from the hollow portion 6111e, which is beneficial to increase the suppression effect of the first auxiliary magnet 6238 on the magnetic field lines of the central magnet 6231, thereby further increasing the magnetic field strength in the magnetic gap 623a.

[0196] In some other embodiments, please refer to Figure 35 , Figure 35This is a cross-sectional view of a speaker module 60 provided in some embodiments of this application. A first cover plate 6111 has a mounting hole 6111f, and a first auxiliary magnet 6238 is disposed within the mounting hole 6111f. The mounting hole 6111f is formed as a through hole penetrating both the inner and outer surfaces of the first cover plate 6111. The outer peripheral wall of the first auxiliary magnet 6238 is connected to the inner edge of the mounting hole 6111f. This facilitates the fixing of the first auxiliary magnet 6238 and effectively prevents resonance in the first cover plate 6111, thus improving the sound quality of the speaker module 60.

[0197] In some embodiments, when the first cover plate 6111 includes a reinforcing plate 6111c, a mounting hole 6111f may be formed on the reinforcing plate 6111c.

[0198] Based on the above embodiments, please continue to refer to Figure 35 At least a portion of the first auxiliary magnet 6238 extends into the front cavity 601. Specifically, a portion of the first auxiliary magnet 6238 extends into the front cavity 601, or the entire first magnet extends into the front cavity 601. This reduces the size of the speaker module 60 in the Z-axis direction, thereby reducing the overall volume of the speaker module 60.

[0199] Based on the above embodiments, the portion of the first auxiliary magnet 6238 located within the mounting hole 6111f is also used to seal the mounting hole 6111f to prevent sound generated by the vibration of the diaphragm assembly 622 from leaking from the mounting hole 6111f. Therefore, to ensure the sealing effect of the first auxiliary magnet 6238 on the mounting hole 6111f, the inner edge of the mounting hole 6111f is sealed to the first auxiliary magnet 6238 to seal the gap between the inner edge of the mounting hole 6111f and the first auxiliary magnet 6238.

[0200] To achieve a sealed connection between the inner edge of the mounting hole 6111f and the first auxiliary magnet 6238, in some embodiments, please refer to... Figure 36 , Figure 36 This is a cross-sectional view of a speaker module 60 provided in some embodiments of this application. In this embodiment, the speaker module 60 further includes a seal 6111g, which is used to seal the gap between the mounting hole 6111f and the first auxiliary magnet 6238. The seal 6111g can be disposed inside the housing 61 or outside the housing 61.

[0201] For example, please refer to Figure 36The sealing element 6111g is disposed within the housing 61. The sealing element 6111g includes a first connecting piece 6111g1, a sealing piece 6111g2, and a second connecting piece 6111g3, all of which are annular. The first connecting piece 6111g1 is connected to the inner surface of the first cover plate 6111 and surrounds the outer periphery of the mounting hole 6111f. The second connecting piece 6111g3 is connected to the end face of one end of the first auxiliary magnet 6238 that extends into the mounting hole 6111f. The sealing piece 6111g2 is connected between the first connecting piece 6111g1 and the second connecting piece 6111g3. In this way, the sealing element 6111g effectively seals the gap between the mounting hole 6111f and the first auxiliary magnet 6238, and the structure is simple and easy to manufacture.

[0202] In other embodiments, the sealant 6111g may also be a sealant (not shown) filling the space between the mounting hole 6111f and the first auxiliary magnet 6238. This sealant includes, but is not limited to, one or more of UV adhesive (also known as shadowless adhesive), polyurethane, silicone rubber, polysulfide rubber, neoprene rubber, and epoxy resin sealant. This sealant can seal the gap between the inner edge of the mounting hole 6111f and the first auxiliary magnet 6238. This structure is simple, easy to operate, and suitable for sealing gaps of different shapes, offering a wide range of applications and superior flexibility. Furthermore, the sealant further bonds the first auxiliary magnet 6238 to the first cover plate 6111, improving the connection stability between the first auxiliary magnet 6238 and the first cover plate 6111.

[0203] In some embodiments, the first auxiliary magnet 6238 and the first cover plate 6111 are an integral structure. That is, the first auxiliary magnet 6238 and the first cover plate 6111 are formed as a single unit. For example, in some embodiments, the first cover plate 6111 is a plastic part, and in this embodiment, the first cover plate 6111 can be molded onto the first auxiliary magnet 6238 using an injection molding process. This improves the sealing performance between the first auxiliary magnet 6238 and the mounting hole 6111f, eliminates the need for an additional sealing element 6111g, simplifies the assembly steps of the first auxiliary magnet 6238 and the first cover plate 6111, and improves assembly efficiency.

[0204] For further details, please refer to Figure 37 , Figure 37 This is a cross-sectional view of a speaker module 60 according to other embodiments of this application. The speaker module 60 in this embodiment includes, in addition to... Figure 27In addition to the housing 61, diaphragm assembly 622, voice coil, magnetic circuit system 623, and first auxiliary magnet 6238, the loudspeaker module 60 shown includes a second auxiliary magnet 6239, located on the side of the diaphragm assembly 622 away from the magnetic circuit system 623. The second auxiliary magnet 6239 is spaced apart from the diaphragm assembly 622 to avoid interfering with its movement. The second auxiliary magnet 6239 can be located inside or outside the housing 61. When located inside the housing 61, it can be disposed on the inner surface of the housing 61. When located outside the housing 61, it can be disposed on the outer surface of the housing 61, or on the middle plate 30 or outer casing of the electronic device 100.

[0205] The projection of the second auxiliary magnet 6239 along the central axis O of the diaphragm assembly 622 onto the diaphragm assembly 622 is the fourth projection, and the projection of the side magnet 6232 along the central axis O of the diaphragm assembly 622 onto the diaphragm assembly 622 is the fifth projection. The fourth projection can be the orthographic projection of the second auxiliary magnet 6239 onto the plane where the dome 6221 is located. The fifth projection can be the orthographic projection of the side magnet 6232 onto the plane where the dome 6221 is located.

[0206] The fourth and fifth projections overlap. The fourth and fifth projections may partially or completely overlap. When the first and second projections partially overlap, there are three cases: First, the fourth and fifth projections intersect, with a portion of the fourth projection coinciding with a portion of the fifth projection, while another portion of the fourth projection does not coincide with another portion of the fifth projection. Second, the outer contour line of the fourth projection lies within the outer contour line of the fifth projection, meaning the fourth projection is contained within the fifth projection; in this case, the area of ​​the fifth projection is larger than the area of ​​the fourth projection. Third, the outer contour line of the fifth projection lies within the outer contour line of the fourth projection, meaning the fifth projection can be contained within the fourth projection; in this case, the area of ​​the fifth projection is smaller than the area of ​​the fourth projection.

[0207] When the fourth and fifth projections completely overlap, their outer contours completely coincide. In this case, the area of ​​the fourth projection is equal to the area of ​​the fifth projection. It should be noted that the phrase "the fourth and fifth projections completely overlap" in this application should be interpreted broadly. That is, a strict overlap is not required. Due to manufacturing errors, if the area of ​​the fourth projection is slightly larger or slightly smaller than the area of ​​the fifth projection, it can still be considered as a complete overlap.

[0208] The second auxiliary magnet 6239 can be a magnet or a magnetic steel. The magnetic pole of the second auxiliary magnet 6239 near the side magnet 6232 is the same as the magnetic pole of the side magnet 6232 near the second auxiliary magnet 6239, and the magnetic pole of the second auxiliary magnet 6239 away from the side magnet 6232 is opposite to the magnetic pole of the side magnet 6232 near the second auxiliary magnet 6239.

[0209] For example, please refer to Figure 37 The end of the side magnet 6232 closest to the second auxiliary magnet 6239 is the S pole, and the end away from the second auxiliary magnet 6239 is the N pole. The end of the second auxiliary magnet 6239 closest to the side magnet 6232 is the S pole, and the end away from the side magnet 6232 is the N pole.

[0210] Therefore, the magnetic field lines of the second auxiliary magnet 6239 and the magnetic field lines of the side magnet 6232 mutually inhibit each other, effectively suppressing the outward divergence of the magnetic field lines of the side magnet 6232. This effectively increases the magnetic flux density and magnetic field strength within the magnetic gap 623a, thereby improving the sensitivity and acoustic performance of the speaker module 60. Simultaneously, since the second auxiliary magnet 6239 is located on the side of the diaphragm assembly 622 furthest from the magnetic circuit system 623, increasing the magnetic flux density within the magnetic gap 623a does not increase the overall volume of the magnetic circuit system 623. This facilitates the miniaturization of the speaker module 60, and during production, there is no need to alter the structure of the magnetic circuit system 623 and the core 62 of the speaker module 60, effectively reducing production costs.

[0211] In some embodiments, the second auxiliary magnet 6239 may be disposed on the first cover plate 6111. See also... Figure 37 The second auxiliary magnet 6239 can be disposed on the outer surface of the first cover plate 6111. In other embodiments, the second auxiliary magnet 6239 can also be disposed on the inner surface of the first cover plate 6111. Exemplarily, the second auxiliary magnet 6239 can be disposed on the outer or inner surface of the reinforcing plate 6111c in the first cover plate 6111 by means of adhesive bonding, snap-fit, etc. This facilitates the assembly of the second auxiliary magnet 6239.

[0212] In some other embodiments, please refer to Figure 38 , Figure 38This is an assembly diagram of the speaker module 60 and the electronic device 100 according to some embodiments of this application. In this embodiment, the second auxiliary magnet 6239 is disposed on the middle plate 30 of the electronic device 100. In other embodiments, the second auxiliary magnet 6239 may also be disposed on the outer casing of the electronic device 100. In this way, the second auxiliary magnet 6239 can be arranged using the space inside the electronic device 100, thereby making full and reasonable use of the internal space of the electronic device 100, which is conducive to realizing the thin and light design of the electronic device 100.

[0213] It is understood that in some other embodiments, the speaker module 60 may only provide the second auxiliary magnet 6239 described above, without providing the first auxiliary magnet 6238. Please refer to [link to relevant documentation]. Figure 39 , Figure 39 This is a cross-sectional view of a speaker module 60 according to some embodiments of this application. The speaker module 60 in this embodiment is... Figure 27 The difference between the speaker module 60 shown is that the speaker module 60 in this embodiment includes, in addition to, Figure 27 In addition to the housing 61, diaphragm assembly 622, first voice coil 6241, second voice coil 6242, and magnetic circuit system 623 in the speaker module 60 shown in this embodiment, the speaker module 60 also includes a second auxiliary magnet 6239, which is located on the side of the diaphragm assembly 622 away from the magnetic circuit system 623. The second auxiliary magnet 6239 is spaced apart from the diaphragm assembly 622 to avoid interfering with the movement of the diaphragm assembly 622. The second auxiliary magnet 6239 can be located inside or outside the housing 61. When the second auxiliary magnet 6239 is located inside the housing 61, it can be disposed on the inner surface of the housing 61. When the second auxiliary magnet 6239 is located outside the housing 61, it can be disposed on the outer surface of the housing 61, or on the middle plate 30 or the outer casing of the electronic device 100.

[0214] In some embodiments, the second auxiliary magnet 6239 may be formed as a rectangular ring structure. The second auxiliary magnet 6239 may be an integral structure or a separate structure.

[0215] The projection of the second auxiliary magnet 6239 along the central axis O of the diaphragm assembly 622 onto the diaphragm assembly 622 is the fourth projection, and the projection of the side magnet 6232 along the central axis O of the diaphragm assembly 622 onto the diaphragm assembly 622 is the fifth projection. The fourth projection can be the orthographic projection of the second auxiliary magnet 6239 onto the plane where the dome 6221 is located. The fifth projection is the orthographic projection of the side magnet 6232 onto the plane where the dome 6221 is located. The fourth and fifth projections overlap. The fourth and fifth projections partially overlap or completely overlap.

[0216] In this embodiment, the magnetic pole direction of the second auxiliary magnet 6239 can be the same as... Figure 37 and Figure 38 The magnetic poles of the second auxiliary magnet 6239 shown are in the same direction, which will not be described again here.

[0217] In this embodiment, the second auxiliary magnet 6239 may be disposed on the first cover plate 6111. See also... Figure 39 The second auxiliary magnet 6239 can be disposed on the outer surface of the first cover plate 6111. In other embodiments, the second auxiliary magnet 6239 can also be disposed on the inner surface of the first cover plate 6111. Exemplarily, the second auxiliary magnet 6239 can be disposed on the outer or inner surface of the reinforcing plate 6111c in the first cover plate 6111 by means of adhesive bonding, snap-fit, etc. This facilitates the assembly of the second auxiliary magnet 6239.

[0218] In some other embodiments, please refer to Figure 40 The second auxiliary magnet 6239 can also be disposed on the middle plate 30 of the electronic device 100. In other embodiments, the second auxiliary magnet 6239 can also be disposed on the housing of the electronic device 100. This application does not limit the specific location of the second auxiliary magnet 6239.

[0219] Please see Figure 41 , Figure 41 This is a cross-sectional view of a speaker module 60 according to some embodiments of this application. The speaker module 60 in this embodiment, in addition to including... Figure 37The speaker module 60 shown includes a housing 61, a diaphragm assembly 622, a first voice coil 6241, a second voice coil 6242, a magnetic circuit system 623, a first auxiliary magnet 6238, a second auxiliary magnet 6239, and a third auxiliary magnet 6240, which is a magnet or a steel magnet. In this embodiment, the second auxiliary magnet 6239 is arranged circumferentially around the first auxiliary magnet 6238, and the third auxiliary magnet 6240 is disposed between the first auxiliary magnet 6238 and the second auxiliary magnet 6239, and is spaced apart from both the first and second auxiliary magnets. The magnetization direction of the third auxiliary magnet 6240 is perpendicular to the magnetization direction of the first auxiliary magnet 6238, and the magnetic pole of the end of the third auxiliary magnet 6240 near the first auxiliary magnet 6238 is the same as the magnetic pole of the end of the first auxiliary magnet 6238 near the diaphragm assembly 622, while the magnetic pole of the end of the third auxiliary magnet 6240 away from the first auxiliary magnet 6238 is the same as the magnetic pole of the end of the first auxiliary magnet 6238 away from the diaphragm assembly 622. In some embodiments, the first auxiliary magnet 6238 and the second auxiliary magnet 6239 may be disposed on the same side surface of the first cover plate 6111. In other embodiments, the first auxiliary magnet 6238 and the second auxiliary magnet 6239 may also be disposed on the same side surface of the middle plate 30 or the outer shell.

[0220] For example, please refer to Figure 41 The first auxiliary magnet 6238 has its N pole at the end closest to the diaphragm assembly 622 and its S pole at the end furthest from the diaphragm assembly 622. The third auxiliary magnet 6240 has its N pole at the end closest to the first auxiliary magnet 6238 and its S pole at the end furthest from the first auxiliary magnet 6238. In this way, the first auxiliary magnet 6238, the second auxiliary magnet 6239, and the third auxiliary magnet 6240 form a Hellbeck array, which concentrates the magnetic force towards the second voice coil 6242, increasing the driving strength of the diaphragm assembly 622. The Hellbeck array is a permanent magnet arrangement where permanent magnets with different magnetization directions are arranged in a specific order, resulting in a significantly stronger magnetic field on one side of the Hellbeck array and a significantly weaker magnetic field on the other side.

[0221] With the trend towards thinner and miniaturized electronic devices 100, a common approach to improving the sensitivity of speaker modules 60 is to increase the magnetic circuit utilization rate of the speaker module 60 itself, which has now reached its limit. The speaker module 60 provided in this application fully utilizes the internal space of the electronic device 100. By coupling the speaker module 60 with the entire electronic device 100, an integrated solution is proposed to enhance the magnetic field strength B and the voice coil length L within the vibration region of the diaphragm assembly 622. This allows for improved audio performance of the electronic device 100 while meeting the requirements of a thinner design.

[0222] Since the electronic device 100 provided in some embodiments of this application includes the above-described speaker module 60, it is possible to improve the audio performance of the electronic device 100 while satisfying the thin design of the electronic device 100.

[0223] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0224] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A loudspeaker module (60) characterized by, The application relates to a loudspeaker module (60), which comprises: a shell (61), wherein a first cover plate (6111) is provided with a mounting hole (6111f) penetrating the inner surface and the outer surface of the first cover plate (6111); a core (62) arranged in the shell (61), wherein the core (62) comprises: a diaphragm group (622), wherein the first cover plate (6111) is opposite to the diaphragm group (622), and a front cavity (601) of the loudspeaker module (60) is located between the first cover plate (6111) and the diaphragm group (622); a first voice coil (6241) connected with the diaphragm group (622), a magnetic circuit system (623) located on the same side of the diaphragm group (622) as the first voice coil (6241); and a second voice coil (6242) fixed to the diaphragm group (622), wherein the second voice coil (6242) is a planar voice coil, the second voice coil (6242) and the first voice coil (6241) are located on opposite sides of the diaphragm group (622) respectively, the first voice coil (6241) is fixed to one side of the diaphragm group (622) facing the magnetic circuit system (623), the second voice coil (6242) is fixed to one side of the diaphragm group (622) facing away from the magnetic circuit system (623), and the first voice coil (6241) and the second voice coil (6242) are matched with the magnetic circuit system (623) to synchronously drive the diaphragm group (622) to vibrate; a first auxiliary magnet (6238) arranged in the mounting hole (6111f) and in sealing connection with the mounting hole (6111f) and the first auxiliary magnet (6238). The loudspeaker module (60) further comprises a sealing member (6111g), which comprises a first connecting sheet (6111g1), a sealing sheet (6111g2) and a second connecting sheet (6111g3); 2. The loudspeaker module (60) according to claim 1, characterized in that the first connecting sheet (6111g1) is connected with the inner surface of the first cover plate (6111) and surrounds the outer periphery of the mounting hole (6111f), the second connecting sheet (6111g3) is connected to the surface of the first auxiliary magnet (6238) facing the diaphragm group (622), and the sealing sheet (6111g2) is connected between the first connecting sheet (6111g1) and the second connecting sheet (6111g3). The inner edge of the mounting hole (6111f) is filled with sealing glue between the first auxiliary magnet (6238).

3. The loudspeaker module (60) according to claim 1, characterized in that The first auxiliary magnet (6238) and the first cover plate (6111) are in an integrated structure.

4. The loudspeaker module (60) of claim 1, characterized in that The second voice coil (6242) is annular.

5. The loudspeaker module (60) according to any of claims 1-4, characterized by The second voice coil (6242) is wound by copper-aluminum alloy wires.

6. The loudspeaker module (60) according to any of claims 1-4, characterized by The application further relates to a loudspeaker module (60), which comprises:

7. The loudspeaker module (60) according to any of claims 1-4, characterized by ​ A positive conductive layer (6222d) and a negative conductive layer (6222e), both of which are arranged on a side surface of the diaphragm group (622) facing away from the magnetic circuit system (623); A positive terminal of the second voice coil (6242) is connected to the positive conductive layer (6222d), and a negative terminal of the second voice coil (6242) is connected to the negative conductive layer (6222e).

8. The loudspeaker module (60) according to claim 7, characterized in that Both the positive conductive layer (6222d) and the negative conductive layer (6222e) extend outward to the outer edge of the diaphragm group (622).

9. The loudspeaker module (60) according to any of claims 1-4, characterized by The diaphragm group (622) includes a diaphragm (6222), a portion of the diaphragm (6222) protrudes in a direction away from the first voice coil (6241) to form a folded ring (6222b); the thickness of the second voice coil (6242) is less than or equal to the height of the folded ring (6222b).

10. The loudspeaker module (60) according to any of claims 1-4, characterized by The magnetic circuit system (623) includes a center magnet (6231) and a side magnet (6232), and the side magnet (6232) is arranged in the circumferential direction of the center magnet (6231); The projection of the first auxiliary magnet (6238) on the diaphragm group (622) along the central axis of the diaphragm group (622) is a first projection, and the projection of the second voice coil (6242) on the diaphragm group (622) along the central axis of the diaphragm group (622) is a second projection, and the first projection and the second projection overlap.

11. The loudspeaker module (60) according to claim 10, characterized in that The projection of the center magnet (6231) on the diaphragm group (622) along the central axis of the diaphragm group (622) is a third projection, and the third projection overlaps the first projection.

12. The loudspeaker module (60) of claim 10, characterized by The magnetic pole of the first auxiliary magnet (6238) close to one end of the center magnet (6231) is opposite to the magnetic pole of the center magnet (6231) close to one end of the first auxiliary magnet (6238), and the magnetic pole of the first auxiliary magnet (6238) away from one end of the center magnet (6231) is the same as the magnetic pole of the center magnet (6231) close to one end of the first auxiliary magnet (6238); Or the magnetic pole of the first auxiliary magnet (6238) close to one end of the center magnet (6231) is the same as the magnetic pole of the center magnet (6231) close to one end of the first auxiliary magnet (6238), and the magnetic pole of the first auxiliary magnet (6238) away from one end of the center magnet (6231) is opposite to the magnetic pole of the center magnet (6231) close to one end of the first auxiliary magnet (6238).

13. The loudspeaker module (60) of claim 10, characterized by Further comprising: A second auxiliary magnet (6239) is located on a side of the diaphragm group (622) away from the magnetic circuit system (623), a projection of the second auxiliary magnet (6239) on the diaphragm group (622) along a central axis of the diaphragm group (622) is a fourth projection, a projection of the side magnet (6232) on the diaphragm group (622) along the central axis of the diaphragm group (622) is a fifth projection, the fourth projection overlaps with the fifth projection, a magnetic pole of the second auxiliary magnet (6239) near one end of the side magnet (6232) is the same as a magnetic pole of the side magnet (6232) near one end of the second auxiliary magnet (6239), and a magnetic pole of the second auxiliary magnet (6239) away from one end of the side magnet (6232) is opposite to the magnetic pole of the side magnet (6232) near one end of the second auxiliary magnet (6239).

14. The loudspeaker module (60) according to claim 13, characterized in that The second auxiliary magnet (6239) is arranged around the circumference of the first auxiliary magnet (6238), and the speaker module (60) further comprises: A third auxiliary magnet (6240) is arranged between the first auxiliary magnet (6238) and the second auxiliary magnet (6239), the first auxiliary magnet (6238) and the second auxiliary magnet (6239) are spaced apart from the third auxiliary magnet (6240), a magnetization direction of the third auxiliary magnet (6240) is perpendicular to a magnetization direction of the first auxiliary magnet (6238), a magnetic pole of the third auxiliary magnet (6240) near one end of the first auxiliary magnet (6238) is the same as a magnetic pole of the first auxiliary magnet (6238) near the diaphragm group (622), and a magnetic pole of the third auxiliary magnet (6240) away from one end of the first auxiliary magnet (6238) is the same as a magnetic pole of the first auxiliary magnet (6238) away from the diaphragm group (622).

15. A loudspeaker module (60) characterized by It comprises: A shell (61) comprising a first cover plate (6111); A core (62) arranged in the shell (61), the core (62) comprising: A diaphragm group (622) that divides a containing space in the shell (61) into a front cavity (601) and a rear cavity (602), the front cavity (601) being located between the diaphragm group (622) and the first cover plate (6111); A first voice coil (6241) connected to the diaphragm group (622), the first voice coil (6241) being located on a side of the diaphragm group (622) away from the cover plate (6111); A magnetic circuit system (623) located on the same side of the diaphragm group (622) as the first voice coil (6241); and ​ A second voice coil (6242) is fixed to the diaphragm group (622), and the second voice coil (6242) is located on the side of the diaphragm group (622) close to the first cover plate (6111), and the second voice coil (6242) is a planar voice coil; the first voice coil (6241) and the second voice coil (6242) cooperate with the magnetic circuit system (623) to synchronously drive the diaphragm group (622) to vibrate; A first auxiliary magnet (6238) is arranged on the side of the first cover plate (6111) away from the diaphragm group (622); The outer surface of the first cover plate (6111) is provided with a groove (6111d) recessed towards the diaphragm group (622), and the first auxiliary magnet (6238) is arranged in the groove (6111d); the bottom wall of the groove (6111d) is provided with an open portion (6111e), and the orthographic projection of the first auxiliary magnet (6238) on the bottom wall of the groove (6111d) covers the open portion (6111e).

16. An electronic device (100), characterized by Comprise: A housing, wherein an acoustic outlet (22a) is arranged on the housing; A loudspeaker module (60) is arranged in the housing, and the loudspeaker module (60) is the loudspeaker module (60) according to any one of claims 1-15, and the loudspeaker module (60) has a sound outlet channel (60a), and the sound outlet channel (60a) communicates with the acoustic outlet (22a).

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