Sound unit, speaker module and electronic equipment

Abstract

This application relates to the field of terminal technology, and more particularly to a sound-generating unit, a speaker module, and an electronic device. The sound-generating unit includes a frame, a diaphragm, a first magnetic circuit assembly, and a first voice coil; the first magnetic circuit assembly is fixed to the frame, the diaphragm is arranged around the first magnetic circuit assembly, the inner periphery of the diaphragm is fixedly connected to the first magnetic circuit assembly, the outer periphery of the diaphragm is fixedly connected to the frame, the first voice coil is fixedly connected to the vibrating part of the diaphragm, and the first voice coil is located in the first magnetic gap of the first magnetic circuit assembly; the first magnetic circuit assembly includes a first central magnetic element and a first side magnetic element, wherein the first central magnetic element and / or the first side magnetic element constitute a Heilbeck array, in which case the leakage magnetic field of the first central magnetic element and / or the first side magnetic element is small, and the first central magnetic element and / or the first side magnetic element strengthens the magnetic field on one side of the first magnetic gap, thus the magnetic field strength of the first magnetic gap is stronger, making the performance of the first magnetic circuit assembly stronger, and which is conducive to improving the sound quality of the sound-generating unit.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a sound-generating unit, a speaker module, and an electronic device. Background Technology

[0002] With the increasing demand for thinner and lighter terminal devices, these devices are becoming increasingly thinner, posing a significant challenge to the thickness of loudspeakers. Traditionally, as loudspeakers become thinner, the thickness of other components decreases, leading to a reduction in speaker performance. Current technologies can increase the vibrating area of ​​the loudspeaker diaphragm to improve performance, but this requires a larger rear cavity. Therefore, existing loudspeaker technologies struggle to achieve high sound quality while maintaining a thin design. Utility Model Content

[0003] The purpose of this application is to provide a sound generating unit, a speaker module, and an electronic device.

[0004] In a first aspect, embodiments of this application provide a sound-generating unit, including a frame, a diaphragm, a first magnetic circuit assembly, and a first voice coil; the first magnetic circuit assembly is fixed to the frame, the diaphragm is disposed around the first magnetic circuit assembly, the inner periphery of the diaphragm is fixedly connected to the first magnetic circuit assembly, the outer periphery of the diaphragm is fixedly connected to the frame, the first voice coil is fixedly connected to the vibrating part of the diaphragm, and the first voice coil is located in a first magnetic gap of the first magnetic circuit assembly; the first magnetic circuit assembly includes a first central magnetic element and a first side magnetic element, the first side magnetic element is disposed around the first central magnetic element, and the first central magnetic element and the first side magnetic element form a first magnetic gap.

[0005] The first central magnetic component includes a first central magnet, a second central magnet, and a third central magnet arranged along a first direction, which is parallel to the axis of the first voice coil. The first central magnet is fixedly connected to the frame, and the third central magnet is located on the side of the first central magnet closer to the diaphragm. The magnetization directions of the first and third central magnets are both parallel to the first direction and both point towards the second central magnet. The magnetization direction of the second central magnet is parallel to the radial direction of the first voice coil and points from the center of the second central magnet to the periphery. The magnetization direction points from the south pole to the north pole or from the north pole to the south pole.

[0006] And / or, the first side magnetic component includes a first side magnet, a second side magnet, and a third side magnet arranged along a first direction. The first side magnet is fixedly connected to the frame, and the third side magnet is located on the side of the first side magnet closer to the diaphragm. The magnetization directions of the first side magnet and the third side magnet are both parallel to the first direction and both point away from the direction of the second side magnet. The magnetization direction of the second side magnet is parallel to the radial direction of the first voice coil and points from the center of the second side magnet to the periphery.

[0007] For example, the axis of the first voice coil is perpendicular to the radial direction.

[0008] For example, the magnetic pole of the second central magnet near the first magnetic gap has the same magnetic polarity as the magnetic pole of the first central magnet near the second central magnet. The magnetic pole of the first central magnet near the second central magnet also has the same magnetic polarity as the magnetic pole of the third central magnet near the second central magnet.

[0009] For example, when the first central magnetic element forms a Hellbeck array, the first side magnetic element may not form a Hellbeck array. Alternatively, when the first side magnetic element forms a Hellbeck array, the first central magnetic element may not form a Hellbeck array. Or, both the first central magnetic element and the first side magnetic element form a Hellbeck array.

[0010] In this embodiment, when the first central magnetic element forms a Heilbeck array, the second central magnet is the main magnet, and the first and third central magnets are auxiliary magnets. By setting the magnetization directions of the first, second, and third central magnets, the magnetic field strength on the side of the first central magnetic element near the first magnetic gap is strengthened, and the magnetic leakage on the side of the first central magnetic element away from the first magnetic gap is reduced, thereby enhancing the magnetic field strength of the first magnetic gap. This is beneficial for improving the driving force of the first magnetic circuit assembly on the first voice coil. When the sound-generating unit is applied to a speaker module, it is beneficial for improving the frequency response performance of the speaker module, thereby improving the sound quality, and also beneficial for reducing the space requirements of the speaker module for the rear cavity, thus facilitating the miniaturization design of the speaker module.

[0011] When the first central magnetic component forms a Heilbeck array, the second central magnet is the main magnet, and the first and third central magnets are auxiliary magnets. By setting the magnetization directions of the first, second, and third central magnets, the magnetic field strength on the side of the first central magnetic component near the first magnetic gap is strengthened, and the magnetic leakage on the side of the first central magnetic component away from the first magnetic gap is reduced. This, in turn, enhances the magnetic field strength of the first magnetic gap, which is beneficial for improving the driving force of the first magnetic circuit assembly on the first voice coil. When the sound-generating unit is applied to a speaker module, it helps to improve the frequency response performance of the speaker module, thereby improving the sound quality. It also helps to reduce the space requirements of the speaker module for the rear cavity, thus facilitating the miniaturization design of the speaker module.

[0012] In some embodiments, a through hole is provided in the middle of the first magnetic circuit assembly.

[0013] In this embodiment, by creating a through hole in the first central magnetic component, material is removed from the first central magnetic component, thereby reducing the weight of the first central magnetic component without reducing its magnetic strength.

[0014] In some implementations, the second central magnet is a one-piece ring-shaped magnet.

[0015] In this embodiment, the second central magnet has good overall integrity and is easy to assemble with other components. Furthermore, by providing through holes, the weight of the second central magnet is reduced, and the second central magnet is easy to magnetize as a whole in the direction from the center to the edge.

[0016] In some embodiments, the second central magnet includes a plurality of magnets arranged around a first direction, and the magnetization direction of the plurality of magnets of the second central magnet points from the side closest to the center of the second central magnet to the side closest to the periphery of the second central magnet.

[0017] For example, multiple magnets can be magnetized separately and then assembled to form a second central magnet.

[0018] In this embodiment, the second central magnet is easily formed by splicing together multiple magnets, which facilitates the production of the second central magnet and the magnetization of the second central magnet.

[0019] In some embodiments, the second center magnet includes a first magnet, a second magnet, a third magnet, and a fourth magnet, with the first magnet and the third magnet disposed opposite to each other, and the second magnet and the fourth magnet disposed opposite to each other and located between the first magnet and the third magnet, and the length direction of the first magnet being parallel to the length direction of the first voice coil.

[0020] In this embodiment, the first and third magnets are relatively long, making it easier for them to form a longer magnetic field with the second side magnet, which is beneficial to increasing the magnetic field strength of the first magnetic gap.

[0021] In some embodiments, the second center magnet includes a first magnet, a second magnet, a third magnet, and a fourth magnet, with the first magnet and the third magnet disposed opposite to each other, the second magnet and the fourth magnet disposed opposite to each other, the first magnet and the third magnet located between the second magnet and the fourth magnet, and the length direction of the first magnet being parallel to the length direction of the first voice coil.

[0022] In this embodiment, the first magnet, the second magnet, the third magnet, and the fourth magnet are relatively similar in size, making them easy to assemble and splice.

[0023] In some embodiments, a plurality of magnets of the second side magnet are arranged around a first direction, and the magnetization direction of the plurality of magnets of the second side magnet is from the center side of the second central magnet to the periphery side of the second central magnet.

[0024] In this embodiment, the multiple magnets of the second side magnet can be made independently, which makes it easy to make the second side magnet and easy to magnetize each magnet. The magnetization direction is easy to control, so the overall magnetization direction of the second side magnet is easy to control.

[0025] In some embodiments, the thickness of the first voice coil is greater than the thickness of the second central magnet, the first voice coil surrounds the second central magnet, and surrounds a portion of the structure of the first central magnet and a portion of the structure of the third central magnet; and / or the thickness of the first voice coil is greater than the thickness of the second side magnet, the second side magnet surrounds the first voice coil, and a portion of the structure of the first central magnet and a portion of the structure of the third central magnet surround the first voice coil.

[0026] For example, the thickness direction of the first voice coil can be parallel to the first direction.

[0027] In this embodiment, when the thickness of the second central magnet and / or the second side magnet is relatively thin, the magnetic field formed by the first central magnetic element and / or the first side magnetic element in the first magnetic gap is more concentrated and the magnetic field strength is higher, which is beneficial to improving the driving force on the first voice coil and thus improving the sound quality.

[0028] In some embodiments, the sound-generating unit further includes a first top plate, which connects the diaphragm and the first magnetic circuit assembly. The frame includes a frame and a first plate, which connects the frame and the first magnetic circuit assembly. Both the first top plate and the first plate are made of magnetically conductive material. The first top plate and the first plate are located on opposite sides of the first magnetic circuit assembly. The first top plate is fixedly connected to a first central magnetic component and a first side magnetic component, and the first plate is fixedly connected to the first central magnetic component and the first side magnetic component.

[0029] In this embodiment, the first and second top plates also form a magnetic circuit, which helps reduce magnetic leakage and thus increases the magnetic field strength of the first and second magnetic gaps, thereby increasing the driving force when the first and second magnetic circuit assemblies interact with the first and second voice coils, respectively. Furthermore, there is no need to provide magnetic conductive elements on the top sides of the first and second magnetic circuit assemblies, which facilitates a thinner design for the sound-generating unit.

[0030] In some embodiments, the sound-generating unit further includes a second magnetic circuit assembly and a second voice coil. The second magnetic circuit assembly is fixed to the frame, and the diaphragm is arranged around the second magnetic circuit assembly. The inner periphery of the diaphragm is fixedly connected to the second magnetic circuit assembly, and the outer periphery of the diaphragm is fixedly connected to the frame. The second voice coil is fixedly connected to the vibrating part of the diaphragm and is located in the second magnetic gap of the second magnetic circuit assembly. The second magnetic circuit assembly includes a second central magnetic element and a second side magnetic element. The second side magnetic element is arranged around the second central magnetic element, and the second central magnetic element and the second side magnetic element form a second magnetic gap.

[0031] The second central magnetic component includes a fourth central magnet, a fifth central magnet, and a sixth central magnet arranged along a first direction. The fourth central magnet is fixedly connected to the frame, and the sixth central magnet is located on the side of the fourth central magnet closer to the diaphragm. The magnetization directions of the fourth and sixth central magnets are parallel to the first direction and both point towards the fifth central magnet. The magnetization direction of the fifth central magnet is parallel to the radial direction of the second voice coil and points from the center of the fifth central magnet towards the periphery. Alternatively, the second side magnetic component includes a fourth side magnet, a fifth side magnet, and a sixth side magnet arranged along the first direction. The fourth side magnet is fixedly connected to the frame, and the sixth side magnet is located on the side of the fourth side magnet closer to the diaphragm. The magnetization directions of the fourth and sixth side magnets are parallel to the first direction and both point away from the fifth side magnet. The magnetization direction of the fifth side magnet is parallel to the radial direction of the second voice coil and points from the center of the fifth side magnet towards the periphery.

[0032] In this embodiment, the leakage magnetic field of the second central magnetic element and / or the second side magnetic element is small, and the second central magnetic element and / or the second side magnetic element strengthens the magnetic field on one side of the second magnetic gap. Therefore, the magnetic field strength of the second magnetic gap is stronger, which makes the performance of the second magnetic circuit assembly stronger. This is beneficial to the thin design of the sound unit and to improving the sound quality of the sound unit.

[0033] Through the cooperation of the first magnetic circuit assembly and the first voice coil, and the cooperation of the second magnetic circuit assembly and the second voice coil, the two sets of driving mechanisms jointly drive the diaphragm to vibrate. This helps to reduce the deformation of the diaphragm during vibration, improve the stability of the diaphragm vibration, and thus improve the sound quality. In addition, the two sets of driving mechanisms also allow the diaphragm to be designed as a long strip shape with a large length-to-width ratio, making the sound unit more adaptable.

[0034] In some implementations, the length direction of the first voice coil and the length direction of the second voice coil are parallel to the arrangement direction of the first and second voice coils.

[0035] In this embodiment, the first voice coil and the second voice coil can easily make full use of the magnetic field in the length direction, thereby improving the utilization rate of the first magnetic circuit component and the second magnetic circuit component, which is beneficial to improving the driving force of the first voice coil and the second voice coil. Furthermore, the sound generating unit can easily form a long strip structure, making it easy to apply to long strip-shaped spaces.

[0036] In some embodiments, the speaker module further includes a flexible circuit board, which includes an outer ring portion, a first deformable portion, a first fixed portion, a second deformable portion, and a second fixed portion. The first deformable portion is fixedly connected to the outer ring portion and the first fixed portion, and the second deformable portion is fixedly connected to the outer ring portion and the second fixed portion. The outer ring portion is fixed to the frame, the first fixed portion is fixedly connected to the first voice coil, and the second fixed portion is fixedly connected to the second voice coil.

[0037] In this embodiment, the flexible circuit board is used to transmit electrical signals to the first voice coil and the second voice coil. In addition, the flexible circuit board is also used to position the first voice coil and the second voice coil to prevent the axis of the first voice coil and the axis of the second voice coil from deflecting, so that the first voice coil and the second voice coil vibrate in a straight and stable manner.

[0038] In some embodiments, the speaker module further includes a first reinforcing member and a second reinforcing member; the first reinforcing member is fixedly connected to the outer ring portion and the first fixing portion, and the second reinforcing member is fixedly connected to the outer ring portion and the second fixing portion.

[0039] In this embodiment, the first reinforcing member can deform axially in the first voice coil and reinforce the flexible circuit board in a direction perpendicular to the central axis of the first voice coil, thereby improving the positioning effect of the flexible circuit board on the first voice coil. The second reinforcing member can deform axially in the second voice coil and reinforce the flexible circuit board in a direction perpendicular to the central axis of the second voice coil, thereby improving the positioning effect of the flexible circuit board on the second voice coil.

[0040] Secondly, embodiments of this application provide a speaker module, including a housing and a sound-emitting unit as provided in any embodiment of the first aspect, wherein the sound-emitting unit is fixed to the housing.

[0041] In this embodiment, the speaker module is easy to balance with a thin design and high sound quality requirements.

[0042] Thirdly, embodiments of this application provide an electronic device, including a housing and a speaker module as provided in the second aspect, wherein the speaker module is fixed inside the housing.

[0043] In this embodiment, the electronic device can easily balance a thin design with high sound quality requirements. Attached Figure Description

[0044] To illustrate the technical solutions in the embodiments or background art of this application, the accompanying drawings used in the embodiments or background art of this application will be described below.

[0045] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0046] Figure 2 yes Figure 1 The diagram shows a schematic block diagram of the audio playback process of the electronic device in some usage scenarios.

[0047] Figure 3 yes Figure 1 The diagram shown is an exploded view of the speaker module in some embodiments.

[0048] Figure 4 yes Figure 1 A schematic diagram of the internal structure of the speaker module shown.

[0049] Figure 5 yes Figure 3 The diagram shows a structural schematic of the sound-generating unit in some embodiments.

[0050] Figure 6 yes Figure 5 The diagram shown is an exploded view of the sound-generating unit in some embodiments.

[0051] Figure 7 yes Figure 6 The diagram shown is an exploded structural schematic of a basin stand in some embodiments.

[0052] Figure 8 yes Figure 5 The diagram shows a structural schematic of the basin stand in some other embodiments;

[0053] Figure 9 yes Figure 6 The exploded structural diagram of the first magnetic circuit assembly and the second magnetic circuit assembly is shown.

[0054] Figure 10 yes Figure 5 The diagram shows a partial structural representation of the sound-generating unit in some embodiments.

[0055] Figure 11 yes Figure 6 The diagram shows a schematic representation of the circuit board assembly in some embodiments.

[0056] Figure 12A yes Figure 5 The diagram shows a partial structural representation of the sound-generating unit in some embodiments.

[0057] Figure 12B It is along Figure 12A A sectional view cut at point AA in the middle;

[0058] Figure 13 yes Figure 6 The diagram shows a structural schematic of the support member in some embodiments.

[0059] Figure 14 yes Figure 6 The diagram shows a partial structural representation of the sound-generating unit in some embodiments.

[0060] Figure 15 yes Figure 6 The diagram shows the structure of the diaphragm, the first top plate, and the second top plate.

[0061] Figure 16 It is along Figure 5 A sectional view cut at point BB in the middle;

[0062] Figure 17 yes Figure 16The front view of the sound-generating unit shown;

[0063] Figure 18 It is along Figure 5 A sectional view cut at point CC;

[0064] Figure 19 yes Figure 18 A schematic diagram of the magnetization direction of the sound-generating unit shown.

[0065] Figure 20 yes Figure 18 A schematic diagram of the magnetic field simulation of the sound-generating unit shown.

[0066] Figure 21 yes Figure 18 The diagram shows a structural schematic of the first intermediate magnet layer in some embodiments.

[0067] Figure 22 yes Figure 18 The diagram shown is a structural schematic of the first intermediate magnet layer in some other embodiments;

[0068] Figure 23 yes Figure 18 The diagram shown is a structural schematic of the first intermediate magnet layer in some embodiments.

[0069] Figure 24 yes Figure 18 The diagram shown is a structural schematic of the first intermediate magnet layer in some other embodiments.

[0070] Figure 25 This is a schematic diagram of the internal structure of another sound-generating unit provided in this application;

[0071] Figure 26 yes Figure 25 The diagram shows a simulation of the magnetic field of the sound-generating unit. Detailed Implementation

[0072] The embodiments of this application are described below with reference to the accompanying drawings.

[0073] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" refers to at least two.

[0074] The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0075] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0076] 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.

[0077] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application.

[0078] In some embodiments, the electronic device 1000 can be a device with audio playback capabilities, such as a mobile phone, tablet computer, multimedia player, headphones, speaker, laptop computer, in-vehicle device, foldable terminal device, television, or wearable device. Wearable devices can include smart bracelets, smartwatches, smart headsets, smart glasses, etc. For example, the electronic device can be a thinner, lighter, and smaller rear cavity terminal device. Figure 1 The electronic device 1000 of the illustrated embodiment is described using a mobile phone as an example. Of course, other types of electronic devices 1000 can also adopt a similar structure, which will not be described in detail below.

[0079] For example, electronic device 1000 may include housing 100, display screen 200, and speaker module 300. Housing 100 is used to protect the internal electronic components of electronic device 1000. Housing 100 may include middle frame 1001 and rear cover 1002, middle frame 1001 is connected to rear cover 1002, and middle frame 1001 and rear cover 1002 are disposed opposite to each other.

[0080] For example, the mid-frame 1001 may be located between the display screen 200 and the back cover 1002. The display screen 200 may be fixed to one side of the mid-frame 1001, and the back cover 1002 may be fixed to the side of the mid-frame 1001 facing away from the display screen 200. The display screen 200, together with the mid-frame 1001 and the back cover 1002, may enclose the interior of the electronic device 1000.

[0081] The display screen 200 can be a flexible display screen or a rigid display screen. The display screen 200 can be an organic light-emitting diode (OLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD) display screen, etc.

[0082] For example, the middle frame 1001 may be provided with a sound outlet 1003. The number of sound outlets 1003 may be one or more. Figure 1 The diagram illustrates a plurality of sound outlet holes 1003. In other embodiments, the sound outlet holes 1003 may also be located at the connection points of the back cover 1002, the display screen 200, the middle frame 1001 and the display screen 200, or the middle frame 1001 and the back cover 1002. For example, there may be two sets of sound outlet holes, each set having multiple small holes, with all four sets of sound outlet holes located on two opposite sides of the middle frame, and one set of sound outlet holes distributed on each side.

[0083] For example, the speaker module 300 can be mounted in the housing 100 and located inside the electronic device 1000. Wherein, Figure 1 The speaker module 300 is indicated by a dashed line. There can be multiple speaker modules 300, which can emit sound independently or simultaneously. Different speaker modules 300 can emit sound in the same frequency band or in adjacent frequency bands. For example, there can be four speaker modules 300.

[0084] The speaker module 300 may have a diaphragm for vibrating and producing sound, and the diaphragm may be exposed on the surface of the speaker module 300. The speaker module 300 may be fixed to the housing 100 and together with the housing 100 form a sound outlet channel (also called a front cavity), which is connected to the sound outlet hole 1003. When the diaphragm vibrates, it pushes the air in the sound outlet channel, causing the air in the sound outlet channel to vibrate and produce sound, which is then transmitted through the sound outlet hole 1003, thus enabling the speaker module 300 to play sound to the outside of the electronic device 1000 through the sound outlet hole 1003.

[0085] Please refer to the following: Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows a schematic block diagram of the audio playback process of the electronic device 1000 in some usage scenarios.

[0086] In some embodiments, the audio playback process of the speaker module 300 can be as follows: the electronic device 1000 decodes the audio file into a digital signal, performs digital-to-analog conversion on the digital signal to restore it to an analog signal, then amplifies the analog signal and inputs it to the speaker module 300 for audio playback. Specifically, when the voice coil of the speaker module 300 receives a current signal, the energized voice coil vibrates magnetically in the magnetic field environment of the magnetic circuit assembly of the speaker module 300, thereby causing the diaphragm to vibrate and produce sound.

[0087] In other embodiments, the electronic device 1000 may also include a plurality of speaker modules 300, which can be used to emit sound from multiple audio tracks to form stereo.

[0088] It should be noted that, Figure 1 Only some components of the electronic device 1000 are shown schematically; the actual shape and size of these components are not subject to change. Figure 1 As defined in the accompanying drawings below. It should be understood that when the electronic device 1000 is in other forms, the electronic device 1000 may not include the display screen 200, or the electronic device 1000 may include multiple display screens 200.

[0089] Please refer to the following: Figure 3 and Figure 4 , Figure 3 yes Figure 1 The speaker module 300 shown is an exploded view diagram in some embodiments. Figure 4 yes Figure 1 The diagram shows the internal structure of the speaker module 300.

[0090] In some embodiments, the speaker module 300 may include a housing 10 and a sound-emitting unit 20. The housing 10 is used to fix the sound-emitting unit 20. The sound-emitting unit 20 may also be called a speaker. For ease of description, the speaker module 300 is defined to have a length direction, a width direction, and a thickness direction. The length direction of the speaker module 300 may be parallel to the X direction, the width direction may be parallel to the Y direction, and the thickness direction may be parallel to the Y direction. These directions are arranged perpendicularly to each other. The speaker module 300 and its components or structures are positioned such that the diaphragm is exposed on one side of the speaker module 300 ("top"), and the side opposite to the top side is designated as the "bottom". The length direction, width direction, and thickness direction of the sound-emitting unit 20 may correspond to the same direction as the length direction, width direction, and thickness direction of the speaker module 300.

[0091] The housing 10 can serve as a load-bearing structure for the sound-generating unit 20, supporting and positioning the sound-generating unit 20.

[0092] For example, the housing 10 may have a first mounting groove 101. The first mounting groove 101 may be generally rectangular, and its shape may be approximately the same as that of the sound-generating unit 20. The first mounting groove 101 may be formed in the central region of the housing 10, and the housing 10 may surround the groove space of the first mounting groove 101. The first mounting groove 101 may be a through groove that penetrates the housing 10, that is, the opening size of the first mounting groove 101 on the top and bottom sides of the housing 10 is approximately the same.

[0093] For example, housing 10 may have a sound outlet groove 102. The sound outlet groove 102 may be generally rectangular and may communicate with the first mounting groove 101.

[0094] For example, the housing component 10 may have a mounting hole 103. The mounting hole 103 may penetrate the housing component 10. There may be multiple mounting holes 103, and the multiple mounting holes 103 may be arranged at intervals. The mounting hole 103 is used to pass through a fastener, which can be fixedly connected to the housing of the electronic device to install the speaker module 300 into the electronic device.

[0095] The housing 10 can form a cavity to improve the sound quality of the speaker module 300.

[0096] For example, please refer to the following: Figure 3 and Figure 4 The housing 10 may have a first cavity 104a. The first cavity 104a may be a semi-open cavity. The first cavity 104a may be used to form the rear cavity of the speaker module 300. Within the housing 10, the housing 10 may have a thin-walled structure to maximize the volume of the first cavity 104a.

[0097] The sound-generating unit 20 can be roughly rectangular thin plate structure.

[0098] For example, the sound-generating unit 20 has a diaphragm 41 and a frame 1, with the diaphragm 41 fixed to the frame 1. A second cavity 201 can be formed between the diaphragm 41 and the frame 1, and the second cavity 201 can be a semi-open cavity. For example, the sound-generating unit 20 can have a vent 202. The vent 202 can be located on the side wall of the sound-generating unit 20. There can be multiple vents 202 to increase the flow of gas at the vents 202. One side of the diaphragm 41 is exposed in the sound-generating unit 20. The vent 202 can connect the space on the other side of the diaphragm 41 with the external space of the sound-generating unit 20. For example, the vent 202 can be used to connect the first cavity 104a and the second cavity 201 so that the first cavity 104a and the second cavity 201 together form the rear cavity of the speaker module 300. In this case, the speaker module 300 has a larger rear cavity, which is beneficial to improving the low-frequency sound quality of the speaker module 300.

[0099] It is understandable that the sound-generating unit 20 produces sound through the vibration of the diaphragm 41.

[0100] It is understood that the sound-generating unit 20 can be sealed to the side wall of the first mounting groove 101 so that the first cavity 104a and the second cavity 201 are sealed and connected, forming the rear cavity of the speaker module 300.

[0101] Please refer to the following: Figure 5 and Figure 6 , Figure 5 yes Figure 3 The diagram shown illustrates the structure of the sound-emitting unit 20 in some embodiments. Figure 6 yes Figure 5 The diagram shows an exploded view of the sound-generating unit 20 in some embodiments.

[0102] In some embodiments, the sound-generating unit 20 includes a frame 1, a first magnetic circuit assembly 2, a second magnetic circuit assembly 3, and a vibration assembly 4.

[0103] The first magnetic circuit assembly 2 and / or the second magnetic circuit assembly 3 constitute the magnetic circuit system. The vibration assembly 4 constitutes the vibration system.

[0104] For example, the basin frame 1 can be generally rectangular in shape, and the basin frame 1 can enclose a receiving space. The material of the basin frame 1 can be plastic or the like. The basin frame 1 can serve as the outer shell of the sound-emitting unit 20 and is used to install other components of the sound-emitting unit 20.

[0105] For example, the first magnetic circuit assembly 2 can form a first magnetic gap 2a, and the second magnetic circuit assembly 3 can form a second magnetic gap 3a. The first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 can be fixed to the basin frame 1 respectively. The first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 can be arranged side by side with a gap.

[0106] For example, the vibrating assembly 4 may include a diaphragm 41, a first voice coil 42, and a second voice coil 43. The diaphragm 41 is deformable. The diaphragm 41 can be fixed to the frame 1. The first voice coil 42 can be located in a first magnetic gap 2a, and the second voice coil 43 can be located in a second magnetic gap 3a. The first voice coil 42 can be fixedly connected to the diaphragm 41. The second voice coil 43 can be fixedly connected to the diaphragm 41. The first voice coil 42 and the second voice coil 43 can each be formed by winding wire.

[0107] It is understood that the sound-generating unit 20 may include more or fewer components. When the sound-generating unit 20 includes more components, it may also include a circuit board assembly 5, a support member 6, an annular member 7, a first top plate 8, and a second top plate 9.

[0108] Please refer to the following: Figure 6 and Figure 7 , Figure 7 yes Figure 6 The exploded structural diagram of the basin stand 1 shown in some embodiments.

[0109] In some embodiments, the basin stand 1 may include a frame 11, a first plate 12, and a second plate 13.

[0110] For example, the outer edge of the frame 11 can be rectangular. The frame 11 as a whole can be approximately figure-eight shaped. The frame 11 can have a first opening 111 and a second opening 112. The shape of the first opening 111 can be approximately the same as the shape of the first plate 12, and the shape of the second opening 112 can be approximately the same as the shape of the second plate 13. A reinforcing rib 113 can be formed between the first opening 111 and the second opening 112, which can strengthen the overall strength of the frame 11.

[0111] For example, vent holes 202 can be spaced out on the frame 11. Vent holes 202 can be provided on all four side walls of the outer edge of the frame 11. The vent holes 202 are used for ventilation, and when the sound-generating unit is applied in the speaker module, it can communicate with the rear cavity through the vent holes 202.

[0112] For example, the first plate 12 and the second plate 13 can each be generally thin plate-shaped structures. The first plate 12 and the second plate 13 can each be rectangular structures.

[0113] In this design, the first plate 12 and the second plate 13 are fixedly connected to the frame 11. The first plate 12 is installed in the first opening 111 and covers and seals the first opening 111. The first plate 12 can be sealed to the frame 11. The second plate 13 is installed in the second opening 112 and covers and seals the second opening 112. The second plate 13 can be sealed to the frame 11. In this configuration, the basin frame 1 has a simple structure and is easy to manufacture. In some other embodiments, the basin frame 1 can also be a one-piece molded structural component.

[0114] For example, the first plate 12 and the second plate 13 can each be made of a magnetically conductive material. In this case, the first plate 12 and the second plate 13 can each serve as magnetically conductive components of the speaker module 300, i.e., lower magnetically conductive plates. For example, the materials of the first plate 12 and the second plate 13 can be steel sheets, but the materials of the first plate 12 and the second plate 13 are not limited to this.

[0115] For example, the basin stand 1 may also have a second mounting groove 14. The second mounting groove 14 may be located on the frame 11, the shape of the second mounting groove 14 may be approximately the same as the shape of the frame 11, and the size of the second mounting groove 14 may be smaller than the size of the frame 11.

[0116] For example, the basin stand 1 may also have a first clearance groove 15 and a second clearance groove 16. The first clearance groove 15 and the second clearance groove 16 may each be approximately annular in structure. The first clearance groove 15 may be located on the first plate 12. The second clearance groove 16 may be located on the second plate 13.

[0117] Please see Figure 8 , Figure 8 yes Figure 5 The diagram shows the structure of the basin stand 1 in some other embodiments. Figure 8 The basin stand 1 shown in the embodiment may include Figure 7 Most of the technical features of the basin stand 1 shown in the embodiment will not be repeated for the same technical features in both. The following mainly describes the differences between the two.

[0118] Figure 8 The basin stand 1 shown in the embodiment and Figure 7 The main difference in the basin stand 1 shown in the embodiment is the shape of the basin stand.

[0119] In some embodiments, the areas of the first plate 12 and the second plate 13 are small, and the frame 11 may not include... Figure 7The reinforcing rib 113 is shown in the embodiment. When the first plate 12 and the second plate 13 are assembled onto the frame 11, the first plate 12 and the second plate 13 do not completely cover the bottom space of the frame. Ventilation holes 202 are formed between the first plate 12 and the second plate 13, between the frame 11 and the first plate 12, and between the frame 11 and the second plate 13. Ventilation holes 202 can be used for ventilation. When the sound-generating unit is applied in the speaker module, it can communicate with the rear cavity through the ventilation holes 202.

[0120] Please refer to the following: Figure 6 and Figure 9 , Figure 9 yes Figure 6 The diagram shows an exploded view of the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3.

[0121] In some embodiments, the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 may be arranged along the length direction (e.g., the X direction) of the sound-generating unit. The first magnetic circuit assembly 2 may include a first central magnetic element 21 and a first side magnetic element 22, with the first side magnetic element 22 surrounding the first central magnetic element 21. A first magnetic gap 2a is formed between the first side magnetic element 22 and the first central magnetic element 21.

[0122] The first central magnetic component 21 can be roughly rectangular in shape.

[0123] For example, the first central magnetic component 21 may include a first central magnet 211, a second central magnet 212, and a third central magnet 213, which are stacked sequentially. The shapes and sizes of the three magnets may be substantially the same, but are not specifically limited. The first central magnet 211 may be located on top of the second central magnet 212. The first central magnet 211 may serve as the upper central magnet, and the third central magnet 213 may serve as the lower central magnet.

[0124] For example, the first side magnetic element 22 may be generally ring-shaped. The first side magnetic element 22 includes a first side magnetic portion 221 and a second side magnetic portion 222, which are spaced apart, and a first central magnetic element 21 is located between the first side magnetic portion 221 and the second side magnetic portion 222.

[0125] For example, the first side magnetic element 22 may include a first side magnet 224, a second side magnet 225, and a third side magnet 226, which are stacked sequentially. The first side magnet 224 may be located on top of the second side magnet 225. The shapes of the first side magnet 224 and the second side magnet 225 may be substantially the same. The shape of the third side magnet 226 may be substantially the same as the shape of the second side magnet 225, and the outer dimensions of the third side magnet 226 may be larger than the outer dimensions of the second side magnet 225.

[0126] The first magnetic part 221 and the second magnetic part 222 are both rounded ends. Therefore, the arrangement direction of the first magnetic part 221 and the second magnetic part 222 is as follows: Figure 9 In the Y direction, the distance between the end of the first side magnetic part 221 and the end of the second side magnetic part 222 is less than the width of the first central magnetic element 21, that is, the width of the first clearance space 223 is less than the width of the first central magnetic element 21. At this time, the interval between the first side magnetic part 221 and the second side magnetic part 222 is small, and their volumes are relatively large, making full use of the space occupied by the first magnetic circuit assembly 2, which is beneficial to improving the magnetic field strength of the first magnetic gap 2a.

[0127] For example, the first side magnet 224 may include four sub-magnets, which are arranged at intervals and each has a rounded corner. Similarly, the third side magnet 226 may include four sub-magnets, which are arranged at intervals and each has a rounded corner. The sub-magnets of the first side magnet 224 and the third side magnet 226 are configured in a one-to-one correspondence. In other examples, the first side magnet 224 may include two sub-magnets or other numbers of sub-magnets; this embodiment does not impose specific limitations.

[0128] In some embodiments, the first magnetic circuit assembly 2 may include a first magnet layer 23, a first intermediate magnet layer 24, and a second magnet layer 25, which are stacked sequentially along the axial direction (e.g., the Z direction) of the first voice coil 42.

[0129] The first magnet layer 23 may include a first central magnet 211 and a first side magnet 224; the first intermediate magnet layer 24 may include a second central magnet 212 and a second side magnet 225; and the second magnet layer 25 may include a third central magnet 213 and a third side magnet 226.

[0130] In some embodiments, the second magnetic circuit assembly 3 may include a second central magnetic element 31 and a second side magnetic element 32, the second side magnetic element 32 surrounding the second central magnetic element 31. A second magnetic gap 3a is formed between the second side magnetic element 32 and the second central magnetic element 31.

[0131] For example, the second central magnetic element 31 may include a fourth central magnet 311, a fifth central magnet 312, and a sixth central magnet 313.

[0132] For example, the second magnetic element 32 may include a third magnetic part 321 and a fourth magnetic part 322.

[0133] For example, the second magnetic element 32 may include a fourth magnet 324, a fifth magnet 325, and a sixth magnet 326.

[0134] The specific structures of the second central magnetic element 31 and the second side magnetic element 32 can be referred to the relevant settings of the first central magnetic element 21 and the first side magnetic element 22, which will not be described in detail in this embodiment.

[0135] In some embodiments, the second magnetic circuit assembly 3 includes a third magnet layer 33, a second intermediate magnet layer 34, and a fourth magnet layer 35, which are stacked sequentially along the vibration direction (i.e., the Z direction) of the first voice coil 42.

[0136] For example, the third magnet layer 33 may include a fourth central magnet 311 and a fourth side magnet 324, the second intermediate magnet layer 34 may include a fifth central magnet 312 and a fifth side magnet 325, and the fourth magnet layer 35 may include a sixth central magnet 313 and a sixth side magnet 326.

[0137] Please continue reading. Figure 9 In some embodiments, through holes may be provided in the middle portions of the first central magnetic element 21 and the second central magnetic element 31.

[0138] For example, through holes can be formed in the middle portions of the first central magnet 211, the second central magnet 212, and the third central magnet 213. The through holes 2111 of the first central magnet 211, 2121 of the second central magnet 212, and 2131 of the third central magnet 213 can be coaxially arranged, and each can be approximately rectangular. The size of the through hole 2121 of the second central magnet 212 can be larger than the through holes 2111 of the first central magnet 211 and 2131 of the third central magnet 213. In this case, the first central magnet 211, the second central magnet 212, the third central magnet 213, the fourth central magnet 311, the fifth central magnet 312, and the sixth central magnet 313 are all approximately ring-shaped magnets. In this example, by opening a through hole in the first central magnetic element 21, material is removed from the first central magnetic element 21, and the area of ​​the through hole 2121 of the second central magnet 212 is large, thereby reducing the weight of the first central magnetic element 21 without reducing the magnetic strength of the first central magnetic element 21.

[0139] For example, the fourth central magnet 311 can have a through hole 3111, the fifth central magnet 312 can have a through hole 3121, and the sixth central magnet 313 can have a through hole 3131. For details, please refer to the relevant settings of the first magnetic circuit assembly 2. This embodiment will not repeat them.

[0140] It is understood that in some other embodiments, the middle portions of the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 are not provided with through holes. In this case, the first central magnet 211, the second central magnet 212, the third central magnet 213, the fourth central magnet 311, the fifth central magnet 312, and the sixth central magnet 313 can all be block-shaped magnets.

[0141] Please see Figure 10 , Figure 10 yes Figure 5 The diagram shows a partial structural representation of the sound-generating unit 20 in some embodiments.

[0142] In some embodiments, the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 may be mounted on the basin frame 1.

[0143] For example, the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 can be located in the spaces on both sides of the reinforcing rib 113, respectively. The first magnetic circuit assembly 2 can be fixed to the first plate 12, and the first magnetic gap 2a and the first clearance groove 15 can be correspondingly arranged in the plate surface direction of the first plate 12. For example, the first magnetic gap 2a and the first clearance groove 15 can overlap in the Z direction. The third central magnet 213 (see [reference]) Figure 9 ) and third-side magnet 226 (see Figure 9The first magnetic circuit assembly 3 is fixed to the first plate 12. The second magnetic circuit assembly 3 can be fixed to the second plate 13, and the second magnetic gap 3a and the second clearance groove 16 can be correspondingly arranged in the plate surface direction of the second plate 13. For example, the second magnetic gap 3a and the second clearance groove 16 can overlap in the Z direction. The sixth central magnet 313 (see also...) Figure 9 ) and the sixth-sided magnet 326 (see Figure 9 It is fixed to the second plate 13.

[0144] The first magnetic component 22 has two first clearance spaces 223 formed at its two ends, and the two first clearance spaces 223 are arranged along the length direction (e.g., the X direction) of the sound-generating unit 20. The second magnetic component 32 has two second clearance spaces 323 formed at its two ends, and the two second clearance spaces 323 are arranged along the length direction (e.g., the X direction) of the sound-generating unit 20.

[0145] In some embodiments, when the first plate 12 and the second plate 13 are made of magnetically conductive material, since the first magnetic circuit assembly 2 is fixed to the first plate 12, the first plate 12 can serve as a magnetically conductive element for the first magnetic circuit assembly 2, thereby increasing the magnetic field strength of the first magnetic gap 2a. This is beneficial for increasing the driving force on the first voice coil 42, and the first magnetic circuit assembly 2 does not need to be equipped with a magnetically conductive element, thus reducing the height of the first magnetic circuit assembly 2. Similarly, since the second magnetic circuit assembly 3 is fixed to the second plate 13, the second plate 13 can serve as a magnetically conductive element for the second magnetic circuit assembly 3, thereby increasing the magnetic field strength of the second magnetic gap 3a. This is beneficial for increasing the driving force on the second voice coil 43, and the second magnetic circuit assembly 3 does not need to be equipped with a magnetically conductive element, thus reducing the height of the second magnetic circuit assembly 3.

[0146] Please see Figure 11 , Figure 11 yes Figure 6 The circuit board assembly 5 shown is a structural schematic diagram in some embodiments.

[0147] In some embodiments, the circuit board assembly 5 may include a flexible circuit board 51, a first reinforcement 52, and a second reinforcement 53.

[0148] The flexible circuit board 51 can be deformed. The main deformable direction of the flexible circuit board 51 is its thickness direction (e.g., the Z-direction), and the flexible circuit board 51 can have relatively low stiffness in its thickness direction. The deformability of the flexible circuit board 51 in its thickness direction can be minimized, while its stiffness can be maximized.

[0149] The flexible circuit board 51 may be conductive.

[0150] For example, the flexible circuit board 51 may include an outer ring portion 511, a first deformable portion 512, a first fixing portion 513, a second deformable portion 514, and a second fixing portion 515. The first deformable portion 512 is fixedly connected to the outer ring portion 511 and the first fixing portion 513. The second deformable portion 514 is fixedly connected to the outer ring portion 511 and the second fixing portion 515. The outer ring portion 511 may be a rectangular ring structure. The first deformable portion 512 and the second deformable portion 514 are respectively bent strip structures. The first fixing portion 513 and the second fixing portion 515 are respectively sheet structures. The first fixing portion 513 and the second fixing portion 515 may be arranged along the length direction of the flexible circuit board 51.

[0151] For example, the flexible circuit board 51 can be a one-piece structure. For instance, the flexible circuit board 51 can be formed by one-piece cutting.

[0152] The first reinforcing member 52 and the second reinforcing member 53 also have deformation capabilities. The first reinforcing member 52 and the second reinforcing member 53 can each serve as a small membrane.

[0153] Please refer to the following: Figure 12A and Figure 12B , Figure 12A yes Figure 5 The diagram shows a partial structural representation of the sound-generating unit 20 in some embodiments. Figure 12B It is along Figure 12A A sectional view taken at point AA in the middle.

[0154] In some embodiments, the first voice coil 42 is located in the first magnetic gap 2a and is movably connected to the frame 1.

[0155] For example, a first voice coil 42 surrounds a first central magnetic element 21, and a first side magnetic element 22 surrounds the first voice coil 42.

[0156] For example, the flexible circuit board 51 connects the first voice coil 42 and the frame 1. The outer ring 511 of the flexible circuit board 51 is located in the second mounting groove 14 and is fixedly connected to the groove wall of the second mounting groove 14. The first fixing part 513 can be fixedly connected to the first voice coil 42. Furthermore, the first fixing part 513 can be electrically connected to the first voice coil 42. The first fixing part 513 can be located in a first clearance space 223 away from the second magnetic circuit assembly 3. The first deformable part 512 can be located in the space between the frame 11 and the first magnetic circuit assembly 2. Since the first deformable part 512 can elastically deform, the first voice coil 42 can move relative to the frame 1. The first voice coil 42 can move mainly along the axial direction, and the main deformation direction corresponding to the first deformable part 512 is the axial direction of the first voice coil 42, in a direction perpendicular to the central axis of the first voice coil 42 (e.g., Figure 12B(In the direction within the XY plane), the first deformable part 512 is used to position the first voice coil 42 to prevent the first voice coil 42 from deflecting during sound generation. At this time, the flexible circuit board 51 is used to transmit electrical signals to the first voice coil 42 and the second voice coil 43. In addition, the flexible circuit board 51 is also used to position the first voice coil 42 and the second voice coil 43 to prevent the axis of the first voice coil 42 and the axis of the second voice coil 43 from deflecting, so that the first voice coil 42 and the second voice coil 43 vibrate straight and stably.

[0157] For example, on the axis of the first voice coil 42 (e.g.) Figure 12B In the Z-direction, the first voice coil 42 can be located on the top side of the first clearance groove 15. At this time, the first clearance groove 15 increases the distance between the first voice coil 42 and the first plate 12, which is equivalent to increasing the space required for the vibration of the first voice coil 42, thereby facilitating the thin design of the sound-generating unit 20.

[0158] For example, the first reinforcing member 52 is fixedly connected to the flexible circuit board 51. One end of the first reinforcing member 52 is fixedly connected to the bottom side of the outer ring portion 511, and the other end of the first reinforcing member 52 is fixedly connected to the bottom side of the first fixing portion 513. The first reinforcing member 52 can deform axially in the first voice coil 42 and reinforce the flexible circuit board 51 in a direction perpendicular to the central axis of the first voice coil 42, thereby improving the positioning effect of the flexible circuit board 51 on the first voice coil 42.

[0159] In some embodiments, the second voice coil 43 is located in the second magnetic gap 3a and is movably connected to the frame 1.

[0160] Similarly, the second fixing part 515 can be fixedly connected to the second voice coil 43. Furthermore, the second fixing part 515 can be electrically connected to the second voice coil 43. The first fixing part 513 can be located within a second clearance space 323 away from the first magnetic circuit assembly 2. The second deformable part 514 can be located within the space between the frame 11 and the second magnetic circuit assembly 3. Because the second deformable part 514 can elastically deform, the second voice coil 43 can move relative to the frame 1. The second voice coil 43 can vibrate primarily along its own axial direction. The main deformation direction of the second deformable part 514 is parallel to the axial direction of the second voice coil 43. In a direction perpendicular to the central axis of the second voice coil 43, the second deformable part 514 positions the second voice coil 43, preventing deflection during its movement.

[0161] For example, in the axial direction of the second voice coil 43 (e.g.) Figure 12B (Z-direction), the second voice coil 43 can be located in the second clearance slot 16 (see reference). Figure 10The second clearance groove 16 increases the distance between the second voice coil 43 and the second plate 13, which is equivalent to increasing the space required for the vibration of the second voice coil 43, thus facilitating the thin design of the sound-generating unit 20.

[0162] For example, the second reinforcing member 53 is fixedly connected to the flexible circuit board 51. One end of the second reinforcing member 53 is fixedly connected to the bottom side of the outer ring portion 511, and the other end of the second reinforcing member 53 is fixedly connected to the bottom side of the second fixing portion 515. The second reinforcing member 53 can deform axially in the second voice coil 43 and reinforce the flexible circuit board 51 in a direction perpendicular to the central axis of the second voice coil 43, thereby improving the positioning effect of the flexible circuit board 51 on the second voice coil 43.

[0163] The flexible circuit board 51 is conductive, and the current passing through it causes the first voice coil 42 and the second voice coil 43 to be connected in series.

[0164] In some embodiments, the first voice coil 42 and the second voice coil 43 can be arranged along the length of the speaker module 300. The length directions of both the first voice coil 42 and the second voice coil 43 can be parallel to their arrangement direction. For example, the length direction of the speaker module 300 can be parallel to the X-direction. In this embodiment, the first voice coil 42 and the second voice coil 43 easily make full use of the magnetic field along their length, thereby improving the utilization rate of the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3. This is beneficial for increasing the driving force of the first voice coil 42 and the second voice coil 43. Furthermore, the sound-emitting unit 20 can easily be formed into a long strip structure, making it easy to apply to long, narrow spaces.

[0165] Please see Figure 13 , Figure 13 yes Figure 6 The diagram shows the structural features of the support member 6 in some embodiments. Figure 13 The perspective is Figure 6 The view of the middle support member 6 after it has been flipped. Figure 13 It is roughly a downward-looking perspective.

[0166] In some embodiments, the outer edge of the support member 6 can be a generally rectangular thin plate structure. The support member 6 can serve as a skeleton.

[0167] For example, the support member 6 may form a first receiving hole 61 and a second receiving hole 62 that are spaced apart. The first receiving hole 61 and the second receiving hole 62 pass through the support member 6. The support member 6 as a whole may have a generally figure-eight shaped structure.

[0168] For example, the support member 6 may include a support frame 63, a first support portion 64, and a second support portion 65. The first support portion 64 is fixedly connected to the support frame 63. For instance, the first support portion 64 may include two opposing first support pieces 641 and 642. The first support portion 64 may protrude towards the bottom relative to the support frame 63, and in a direction perpendicular to the support frame 63, the projection of the first support portion 64 coincides with the first receiving hole 61. The second support portion 65 may include two opposing first support pieces 651 and 652. The second support portion 65 may protrude towards the bottom relative to the support frame 63, and in a direction perpendicular to the support frame 63, the projection of the second support portion 65 coincides with the second receiving hole 62.

[0169] In this embodiment, the support member 6 is an integral structural component with strong support capacity.

[0170] Please see Figure 14 , Figure 14 yes Figure 6 The diagram shows a partial structural representation of the sound-generating unit 20 in some embodiments.

[0171] In some embodiments, the support 6 may be fixedly connected to the first voice coil 42 and the second voice coil 43.

[0172] For example, the first support portion 64 can be fixedly connected to the sidewall of the first voice coil 42. The first support piece 641 and the second support piece 642 of the first support portion 64 can be located in two first clearance spaces 223. One support piece of the first support portion 64 that is away from the second voice coil 43 (i.e., the first support piece 641 of the first support portion 64) can be fixedly connected to the first fixing portion 513 of the flexible circuit board 51 (see also...). Figure 12B ).

[0173] For example, the second support portion 65 can be fixedly connected to the sidewall of the second voice coil 43. The first support piece 651 and the second support piece 652 of the second support portion 65 can be located in two second clearance spaces 323. One support piece of the second support portion 65 that is away from the first voice coil 42 (i.e., the first support piece 651 of the second support portion 65) can be fixedly connected to the second fixing portion 515 of the flexible circuit board 51 (see also...). Figure 12B ).

[0174] The support frame 63 of the support member 6 can be located in the space between the first magnetic circuit assembly 2, the second magnetic circuit assembly 3 and the frame 11.

[0175] In some embodiments, the first voice coil 42 may have a first end and a second end disposed opposite to each other in its length direction (e.g., the X direction). A first support piece 641 and a second support piece 642 of the first support portion 64 are arranged along the sound-generating unit 20. The first support piece 641 of the first support portion 64 is fixedly connected to the first end of the first voice coil 42, and the second support piece 642 of the first support portion 64 is fixedly connected to the second end of the first voice coil 42. The second voice coil 43 may have a first end and a second end disposed opposite to each other in its length direction (e.g., the X direction). A first support piece 651 and a second support piece 652 of the second support portion 65 are arranged along a first direction. The first support piece 651 of the second support portion 65 is fixedly connected to the first end of the second voice coil 43, and the second support piece 652 of the second support portion 65 is fixedly connected to the second end of the second voice coil 43. The first support member 6 is directly fixedly connected to the two short shafts of the first voice coil 42 through the first support portion 64, and directly fixedly connected to the two short shafts of the second voice coil 43 through the second support portion 65, simplifying the structure of the support member 6 and improving the reliability of the sound-generating unit 20.

[0176] Please see Figure 15 , Figure 15 yes Figure 6 The diagram shows the structure of the diaphragm 41, the first top plate 8, and the second top plate 9.

[0177] In some embodiments, the diaphragm 41 may include a mounting portion 413, a first folded ring portion 414, a vibrating portion 415, a second folded ring portion 416, and a third folded ring portion 417. The second folded ring portion 416 and the third folded ring portion 417 are spaced apart. The vibrating portion 415 is fixedly connected to both the second folded ring portion 416 and the third folded ring portion 417, and the vibrating portion 415 surrounds the outer edges of both the second folded ring portion 416 and the third folded ring portion 417. The first folded ring portion 414 is fixedly connected to the vibrating portion 415 and surrounds the outer edge of the vibrating portion 415. The mounting portion 413 is fixedly connected to the first folded ring portion 414 and surrounds its outer edge. The vibrating portion 415 may have a generally figure-eight shaped structure. The second folded ring portion 416 and the third folded ring portion 417 may have generally the same shape. The first folded ring portion 414, the second folded ring portion 416, and the third folded ring portion 417 are deformable to allow the vibrating portion 415 to vibrate in the thickness direction of the diaphragm 41, which can be parallel to the Z-direction. In this example, by providing the first folded ring portion 414, the second folded ring portion 416, and the third folded ring portion 417, the inner and outer edges of the vibrating portion 415 are connected with deformable structures, which helps to make the vibrating portion 415 vibrate smoothly. Furthermore, since the second folded ring portion 416 and the third folded ring portion 417 are spaced apart, the vibrating portion 415 has an approximate figure-eight shape, resulting in higher overall strength and greater stability during vibration.

[0178] The vibrating part 415 can serve as a support plate, providing rigidity for the first folded ring part 414, the second folded ring part 416, and the third folded ring part 417. Its strength affects the diaphragm's vibration radiation area and the amount of air propelled, thus affecting the acoustic performance. The portion of the diaphragm 41 other than the vibrating part 415 can be a rubber diaphragm.

[0179] For example, the diaphragm 41 can be a one-piece structural component. In this case, the diaphragm 41 has better overall integrity, better reliability, and is easier to manufacture. For example, the diaphragm 41 can be integrally molded by compression molding or other methods. In some other examples, the diaphragm 41 can also be a split structural component.

[0180] In some embodiments, the first top plate 8 and the second top plate 9 may each be a generally rectangular plate structure.

[0181] For example, the stiffness of the first top plate 8 and the second top plate 9 can be greater than the stiffness of the diaphragm 41. For instance, the first top plate 8 and the second top plate 9 can each be made of a rigid material. In some examples, the first top plate 8 and the second top plate 9 can be made of a magnetically conductive material, in which case the first top plate 8 and the second top plate 9 can each serve as an upper magnetically conductive plate. For example, the materials of the first top plate 8 and the second top plate 9 can both be steel sheets; the materials of the first top plate 8 and the second top plate 9 are not limited to this.

[0182] In some embodiments, the first top plate 8 and the second top plate 9 can be fixedly connected to the diaphragm 41. The first top plate 8 can be fixedly connected to the edge of the second folded ring portion 416. The first top plate 8 and the second folded ring portion 416 can be sealed together. The second top plate 9 can be fixedly connected to the edge of the third folded ring portion 417. The second top plate 9 and the third folded ring portion 417 can be sealed together.

[0183] Please see Figure 16 and Figure 17 , Figure 16 It is along Figure 5 A sectional view cut at point BB. Figure 17 yes Figure 16 The front view of the sound-generating unit 20 shown.

[0184] In some embodiments, the diaphragm 41 may be fixedly connected to the frame 1, the support 6, the first magnetic circuit assembly 2, and the second magnetic circuit assembly 3.

[0185] For example, the mounting portion 413 of the diaphragm 41 can be mated and fixedly connected to the top of the frame 11, and the mounting portion 413 can cover the top of the frame 11 and be sealed at the connection between the two.

[0186] For example, such as Figure 16The vibrating part 415 of the diaphragm 41 can be fixedly connected to the support frame 63 of the support member 6. The shape of the vibrating part 415 is adapted to the shape of the support member 6, and the connection area between the two is large, making the connection more reliable. Since the support member 6 is fixedly connected to the first voice coil 42 and the second voice coil 43, the first voice coil 42 and the second voice coil 43 are fixedly connected to the vibrating part 415 of the diaphragm 41. When the first voice coil 42 and the second voice coil 43 vibrate, the vibrating part 415 vibrates synchronously through the drive of the support member 6. At this time, the first voice coil 42 and the second voice coil 43 are connected to the vibrating part 415 of the diaphragm 41 through the support member 6, which is conducive to flexibly setting the position of the vibrating part 415; and it is also conducive to uniform vibration of the vibrating part 415, thereby improving the sound quality of the sound-producing unit 20.

[0187] For example, such as Figure 17 The first top plate 8 can be fixedly connected to the first magnetic circuit assembly 2. The first top plate 8 can face the first central magnet 211 and is fixedly connected to the first central magnet 211. The second top plate 9 can be fixedly connected to the second magnetic circuit assembly 3. The second top plate 9 can face the third central magnet 213 and is fixedly connected to the third central magnet 213. At this time, the second folded ring portion 416 is fixed between the first side magnetic element 22 and the first top plate 8, and the third folded ring portion 417 is fixed between the second side magnetic element 32 and the second top plate 9. It is understood that when the first voice coil 42 and the second voice coil 43 vibrate, the first top plate 8 and the second top plate 9 do not vibrate. In this example, the diaphragm 41 is fixedly connected to the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 via the first top plate 8 and the second top plate 9, respectively. This facilitates the alignment of the vibrating part 415 of the diaphragm 41 with the position of the support member 6, and also allows for the appropriate size and shape of the first folded ring part 414, the second folded ring part 416, and the third folded ring part 417. In other examples, the diaphragm 41 can be directly connected to the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3. In other examples, the second folded ring part 416 can be located between the first side magnet 224 and the second side magnet 225, and the second folded ring part 416 can be located between the third side magnet 226 and the fifth side magnet 325.

[0188] For example, the vibrating part 415 may be recessed relative to the first top plate 8 and the second top plate 9; in other words, the height of the vibrating part 415 is lower than the height of the first top plate 8 and the second top plate 9. The height space between the first top plate 8 and the vibrating part 415 can serve as part of the space for the vibrating part 415 to vibrate upwards. It can be understood that the space between the vibrating part 415 and the first plate 12 and the second plate 13 can serve as the space for the vibrating part 415 to vibrate downwards. At this time, the height space required for the vibration of the vibrating part 415 coincides with the height space of the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3, which is equivalent to reusing the height space required for setting the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3. There is no need to provide additional vibration space in the height direction for the vibration of the diaphragm 41, which is beneficial to the thin design of the sound-generating unit 20. Therefore, by reducing the height of the diaphragm 41, making the diaphragm 41 lower than the height of the first top plate 8 and the second top plate 9, it is beneficial to the thin design of the speaker module 300.

[0189] It is understood that the diaphragm 41 can be sealed to the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 of the frame 1 to form the first cavity 104a of the sound-generating unit 20.

[0190] Understandably, the first top plate 8 and the second top plate 9 are exposed relative to the diaphragm 41.

[0191] In this embodiment, when the first voice coil 42 and the second voice coil 43 are energized, the first voice coil 42 interacts with the first magnetic circuit assembly 2, and the second voice coil 43 interacts with the second magnetic circuit assembly 3, causing the first voice coil 42 and the second voice coil 43 to vibrate. At this time, the circuit board assembly 5 energizes the first voice coil 42 and the second voice coil 43 and positions them to prevent them from deflecting or swaying during vibration. Furthermore, the support member 6 drives the vibrating part 415 of the diaphragm 41 to vibrate synchronously along the vibration direction of the first voice coil 42, thereby producing sound.

[0192] In some embodiments, the annular member 7 can be fixedly connected to the diaphragm 41. The annular member 7 may include a first annular member 71 and a second annular member 72, both made of metal. The first annular member 71 is located between the second folded ring portion 416 and the first magnetic circuit assembly 2, and is fixedly connected to both. The second annular member 72 is located between the third folded ring portion 417 and the second magnetic circuit assembly 3, and is fixedly connected to both.

[0193] For example, the stiffness of the ring member 7 can be greater than that of the diaphragm 41. For instance, the ring member 7 can be made of a metallic material, such as steel, meaning that both the first ring member 71 and the second ring member 72 can serve as diaphragm steel rings.

[0194] For example, the first ring member 71 is fixed to the side edge of the second folded ring portion 416 opposite to the first top plate 8. The second ring member 72 is fixed to the side edge of the third folded ring portion 417 opposite to the second top plate 9.

[0195] In some examples, the first ring 71 can be fixedly connected to the first side magnetic element 22, and the second ring 72 can be fixedly connected to the second side magnetic element 32, so that the diaphragm 41 is also fixedly connected to the first side magnetic element 22 and the second side magnetic element 32.

[0196] In this embodiment, the first ring member 71 and the second ring member 72 have high rigidity. After they are fixedly connected to the diaphragm 41, on the one hand, the fixing of the diaphragm 41 to the first top plate 8 and the second top plate 9 is more reliable, and on the other hand, they can also support the first folded ring portion 414 and the second folded ring portion 416, thereby improving the fixing effect of the first folded ring portion 414 and the second folded ring portion 416 and facilitating the deformation of the first folded ring portion 414 and the second folded ring portion 416.

[0197] In some embodiments, the first top plate 8 and the second top plate 9 are made of magnetically conductive material. In this case, since the first top plate 8 is connected to the first magnetic circuit assembly 2, the first top plate 8 can serve as part of the first magnetic circuit assembly 2 and form a magnetic circuit. Similarly, the second top plate 9 is connected to the second magnetic circuit assembly 3, and the second top plate 9 can serve as part of the second magnetic circuit assembly 3 and form a magnetic circuit.

[0198] In this embodiment, the first top plate 8 and the second top plate 9 are not only used to fix and connect the diaphragm 41, but also to seal the connection between the diaphragm 41 and the frame 1. The first top plate 8 and the second top plate 9 also form a magnetic circuit, which helps to reduce magnetic leakage, thereby increasing the magnetic field strength of the first magnetic gap 2a and the second magnetic gap 3a, and further increasing the driving force when the first magnetic circuit assembly 2 and the second magnetic circuit assembly 3 interact with the first voice coil 42 and the second voice coil 43, respectively. Furthermore, there is no need to provide magnetic conductive elements on the top side of the first magnetic circuit assembly 2 and the top side of the second magnetic circuit assembly 3, which is beneficial for the thinner design of the sound-generating unit 20.

[0199] In some embodiments, by providing a first clearance space 223 in the first magnetic circuit assembly 2 and a second clearance space 323 in the second magnetic circuit assembly 3, movement space is provided for other components of the sound-generating unit 20, and the space occupied by the first side magnetic element 22 and the second side magnetic element 32 is reduced. This improves the utilization rate of the internal space of the sound-generating unit 20, increases the equivalent space of the sound-generating unit 20 used to form the rear cavity, and helps to improve the sound quality of the sound-generating unit 20.

[0200] In some embodiments, by setting a first magnetic circuit component 2 and a second magnetic circuit component 3 with an interval, that is, setting two sets of magnetic circuit components, compared with one set of magnetic circuit components, the sound generating unit 20 in this embodiment has more space between the two sets of magnetic circuit components, that is, the equivalent rear cavity of the sound generating unit is increased, which is beneficial to improving the low frequency sound quality of the sound generating unit 20.

[0201] Furthermore, through the cooperation of the first magnetic circuit assembly 2 and the first voice coil 42, and the cooperation of the second magnetic circuit assembly 3 and the second voice coil 43, the two sets of driving mechanisms jointly drive the diaphragm 41 to vibrate. This helps to reduce the deformation of the diaphragm 41 during vibration, improve the stability of the diaphragm 41 vibration, and thus improve the sound quality. In addition, the two sets of driving mechanisms also allow the diaphragm 41 to be set into a long strip shape with a large length-to-width ratio, making the sound unit more adaptable.

[0202] In some embodiments, the sound-generating unit 20 may not include the second magnetic circuit assembly 3 and the second voice coil 43. In this case, the diaphragm 41, support member 6, flexible circuit board 51 and other components of the sound-generating unit 20 can be adjusted accordingly. This embodiment does not impose specific limitations.

[0203] Please combine participation Figure 18 and Figure 19 , Figure 18 It is along Figure 5 A sectional view cut at point CC. Figure 19 yes Figure 18 A schematic diagram of the magnetization direction of the sound-generating unit 20 shown.

[0204] In some embodiments, at least one of the first central magnetic element 21 and the first side magnetic element 22 of the first magnetic circuit assembly 2 constitutes a Halbach array.

[0205] In some embodiments, the magnetization directions of the first central magnet 211 and the third central magnet 213 are both parallel to the first direction and both point towards the second central magnet 212. The magnetization direction of the second central magnet 212 is both parallel to the radial direction of the first voice coil 42 and points from the center of the second central magnet 212 to the periphery.

[0206] The first direction is parallel to the axial direction of the first voice coil 42. It can be understood that the axial direction of the first voice coil 42 is perpendicular to the radial direction. The magnetization directions of both the first central magnet 211 and the third central magnet 213 are perpendicular to the magnetization direction of the second central magnet 212.

[0207] In the first magnetic circuit assembly 2, the magnetization direction of the magnet can be from the south pole to the north pole. It is understandable that the magnetization direction determines the magnetism and relative position of the magnetic poles within the magnet.

[0208] For example, the magnetic pole of the second central magnet 212 near the first magnetic gap 2a is the same polarity as the magnetic pole of the first central magnet 211 near the second central magnet 212. The magnetic pole of the first central magnet 211 near the second central magnet 212 is also the same polarity as the magnetic pole of the third central magnet 213 near the second central magnet 212. For example, the magnetic poles of the first central magnet 211 near the second central magnet 212, the magnetic poles of the first central magnet 211 near the first magnetic gap 2a, and the magnetic poles of the third central magnet 213 near the second central magnet 212 are all north poles (N poles).

[0209] In this embodiment, the second central magnet 212 is the main magnet, the first central magnet 211 and the third central magnet 213 are auxiliary magnets, and the first central magnetic element 21 constitutes a Heilbeck array.

[0210] By setting the magnetization directions of the first central magnet 211, the second central magnet 212, and the third central magnet 213, the magnetic field strength on the side of the first central magnetic component 21 near the first magnetic gap 2a is strengthened, and the magnetic leakage on the side of the first central magnetic component 21 away from the first magnetic gap 2a is reduced. This, in turn, enhances the magnetic field strength of the first magnetic gap 2a, which is beneficial for increasing the driving force of the first magnetic circuit assembly 2 on the first voice coil 42. When the sound-generating unit 20 is applied to the speaker module 300, it is beneficial for improving the frequency response performance of the speaker module 300, thereby improving the sound quality. It is also beneficial for reducing the space requirement of the speaker module 300 for the rear cavity, thus facilitating the miniaturization design of the speaker module 300.

[0211] In some embodiments, the magnetization directions of the first side magnet 224 and the third side magnet 226 are both parallel to the first direction and both point away from the direction of the second side magnet 225. The magnetization direction of the second side magnet 225 is parallel to the radial direction of the first voice coil 42 and points from the center of the second side magnet 225 to the periphery.

[0212] For example, the magnetic pole of the second side magnet 225 near the first magnetic gap 2a is the same polarity as the magnetic pole of the first side magnet 224 near the second side magnet 225. The magnetic pole of the first side magnet 224 near the second side magnet 225 is also the same polarity as the magnetic pole of the third side magnet 226 near the second side magnet 225. For instance, the magnetic poles of the first side magnet 224 near the second side magnet 225, the second side magnet 225 near the first magnetic gap 2a, and the third side magnet 226 near the second side magnet 225 are all south poles (S poles).

[0213] In this embodiment, the second side magnet 225 is the main magnet, the first side magnet 224 and the third side magnet 226 are auxiliary magnets, and the first side magnetic element 22 constitutes a Heilbeck array.

[0214] The first magnetic component 22 forms a Heilbeck array. By setting the magnetization direction of the first magnetic component 224, the second magnetic component 225 and the third magnetic component 226, the magnetic field strength of the first magnetic component 22 near the first magnetic gap 2a is strengthened, and the magnetic leakage of the first magnetic component 22 away from the first magnetic gap 2a is reduced. This enhances the magnetic field strength of the first magnetic gap 2a, which is beneficial to improving the driving force of the first magnetic circuit assembly 2 on the first voice coil 42. When the sound unit 20 is applied to the speaker module 300, it is beneficial to improve the sound quality of the speaker module 300 and reduce the space requirement of the speaker module 300 for the rear cavity, thus facilitating the miniaturization design of the speaker module 300.

[0215] In some other embodiments, the magnetization direction can be from the North Pole to the South Pole. It is understood that in this case, the magnetism of each magnet pole in the first magnetic circuit assembly 2 is similar to... Figure 18 In the embodiment, the magnetic poles of each magnet have opposite magnetism.

[0216] It is understandable that when the first central magnetic element 21 forms a Hellbeck array, the first side magnetic element 22 does not form a Hellbeck array. In this case, the first side magnetic element 22 may include multiple layers of magnets in the first direction, such as a first side magnet 224 and a third side magnet 226. The first side magnet 224 and the third side magnet 226 may be magnetic, while the second side magnet 225 may be replaced with a non-magnetic magnetic material or not be magnetized.

[0217] When the first side magnetic element 22 forms a Hellbeck array, the first central magnetic element 21 does not form a Hellbeck array. In this case, the first central magnetic element 21 may include multiple layers of magnets in the first direction, such as a first central magnet 211 and a third central magnet 213. The first central magnet 211 and the third central magnet 213 may be magnetic, while the second central magnet 212 may be replaced with a non-magnetic magnetic material or not be magnetized.

[0218] When the first central magnetic element 21 and the first side magnetic element 22 both form a Heilbeck array, the leakage magnetic field of the first central magnetic element 21 and the first side magnetic element 22 is small. The first central magnetic element 21 and the first side magnetic element 22 strengthen the magnetic field on one side of the first magnetic gap 2a, so the magnetic field strength of the first magnetic gap 2a is stronger, which makes the performance of the first magnetic circuit assembly 2 stronger, which is conducive to the thin design of the sound unit 20 and to improving the sound quality of the sound unit 20.

[0219] In some embodiments, the thickness of the first voice coil 42 is greater than the thickness of the second central magnet 212, the first voice coil 42 surrounds the second central magnet 212, and surrounds a portion of the structure of the first central magnet 211 and a portion of the structure of the third central magnet 213. And / or, the thickness of the first voice coil 42 is greater than the thickness of the second side magnet 225, the second side magnet 225 surrounds the first voice coil 42, and a portion of the structure of the first central magnet 211 and a portion of the structure of the third central magnet 213 surrounds the first voice coil 42.

[0220] It is understandable that the thickness direction of the first voice coil 42 can be parallel to the first direction.

[0221] When the thickness of the second central magnet 212 and / or the second side magnet 225 is relatively thin, the magnetic field formed by the first central magnetic element 21 and / or the first side magnetic element 22 in the first magnetic gap 2a is more concentrated and the magnetic field strength is higher, which is beneficial to improving the driving force on the first voice coil 42 and thus improving the sound quality.

[0222] It is understood that the first top plate 8, the first central magnet 211, the second central magnet 212, the third central magnet 213, and the first plate 12 are stacked and arranged along a first direction (such as the Z direction). The first top plate 8, the first side magnet 224, the second side magnet 225, the third side magnet 226, and the first plate 12 are stacked and arranged along a first direction (such as the Z direction).

[0223] When the first top plate 8 and the first plate body 12 are made of magnetically conductive materials, the first top plate 8 and the first plate body 12 can be used to conduct magnetism between the first central magnetic element 21 and the first side magnetic element 22.

[0224] In some embodiments, at least one of the second central magnetic element and the second side magnetic element of the second magnetic circuit assembly constitutes a Helbch array.

[0225] In some embodiments, the magnetization directions of the fourth and sixth central magnets are both parallel to the first direction and both point towards the fifth central magnet. The magnetization direction of the fifth central magnet is parallel to the radial direction of the second voice coil and points from the center of the fifth central magnet towards the periphery.

[0226] In some embodiments, the magnetization directions of the fourth and sixth side magnets are both parallel to the first direction and both point away from the fifth side magnet. The magnetization direction of the fifth side magnet is parallel to the radial direction of the second voice coil and points from the center of the fifth side magnet to the periphery.

[0227] The specific setting of the magnetic field of the second magnetic circuit component can be referred to the description of the first magnetic circuit component, and will not be repeated in this embodiment.

[0228] In this embodiment, the leakage magnetic field of the second central magnetic component and the second side magnetic component are both small. The second central magnetic component and the second side magnetic component strengthen the magnetic field on one side of the second magnetic gap, so the magnetic field strength of the second magnetic gap is stronger, which makes the performance of the second magnetic circuit assembly stronger. This is beneficial to the thin design of the sound unit and to improving the sound quality of the sound unit.

[0229] Please see Figure 20 , Figure 20 yes Figure 18 The diagram shows a simulation of the magnetic field of the sound-generating unit 20. Arrows represent magnetic field lines; the denser the arrows, the stronger the magnetic field.

[0230] In the first magnetic gap 2a, magnetic field lines are mainly emitted by the first central magnetic element 21 and enter the first side magnetic element 22. Among them, the magnetic field lines are mainly emitted by the second central magnet 212 and received by the second side magnet 225. Therefore, the magnetic field line density is high and the magnetic field is strong between the second central magnet 212 and the second side magnet 225.

[0231] Furthermore, on the side of the first central magnetic element 21 away from the first magnetic gap 2a, the magnetic field line density is low. The magnetic field is weak, and there is little magnetic leakage. On the side of the first peripheral magnetic element 22 away from the first magnetic gap 2a, the magnetic field line density is low. The magnetic field is weak, and there is little magnetic leakage.

[0232] Please refer to the following: Figures 21 to 24 , Figure 21 yes Figure 18 The diagram shown is a structural schematic of the first intermediate magnet layer 24 in some embodiments. Figure 22 yes Figure 18 The diagram shown illustrates the structure of the first intermediate magnet layer 24 in some other embodiments. Figure 23 yes Figure 18 The first intermediate magnet layer 24 shown is a structural schematic diagram in some other embodiments. Figure 24 yes Figure 18 The diagram shows the structure of the first intermediate magnet layer 24 in some other embodiments.

[0233] like Figure 21 and Figure 22 In some embodiments, the second central magnet 212 is a one-piece formed ring-shaped magnet, and a through hole 2121 is provided in the middle of the second central magnet 212. In this case, the second central magnet 212 has better overall integrity and is easy to assemble with other components. Furthermore, by providing the through hole 2121, the weight of the second central magnet 212 is reduced, and the second central magnet 212 is easy to magnetize as a whole in the direction from the center to the edge.

[0234] like Figure 23 and Figure 24In some embodiments, the second central magnet 212 includes multiple magnets arranged around the first direction, and the magnetization direction of the multiple magnets of the second central magnet 212 points from the side closest to the center of the second central magnet 212 to the side closest to the periphery of the second central magnet 212. In this case, the second central magnet 212 is easily formed by splicing multiple magnets, which facilitates the manufacturing of the second central magnet 212 and the magnetization of the second central magnet 212.

[0235] In some embodiments, the second central magnet 212 includes a first magnet 2122, a second magnet 2123, a third magnet 2124, and a fourth magnet 2125. The first magnet 2122 and the third magnet 2124 are arranged opposite to each other, and the second magnet 2123 and the fourth magnet 2125 are arranged opposite to each other. The length direction of the first magnet 2122 is parallel to the length direction of the second central magnet 212. The length direction of the second central magnet 212 may be parallel to the length direction of the first voice coil (e.g., the X direction).

[0236] For example, a through hole 2121 is provided in the middle of the second central magnet 212 to reduce the weight of the second central magnet 212. In some other embodiments, when the second central magnet 212 includes multiple magnets, the second central magnet 212 may not have a through hole 2121.

[0237] For example, such as Figure 23 The second magnet 2123 and the fourth magnet 2125 are located between the first magnet 2122 and the third magnet 2124. At this time, the first magnet 2122 and the third magnet 2124 are relatively long, and the first magnet 2122 and the third magnet 2124 are more likely to form a longer magnetic field with the second side magnet 225, which is beneficial to increasing the magnetic field strength of the first magnetic gap 2a.

[0238] For example, such as Figure 24 The first magnet 2122 and the third magnet 2124 are located between the second magnet 2123 and the fourth magnet 2125. At this time, the sizes of the first magnet 2122, the second magnet 2123, the third magnet 2124 and the fourth magnet 2125 are relatively close, making them easy to assemble and splice.

[0239] For example, the magnetization direction of the first magnet 2122 is opposite to that of the third magnet 2124 and can be parallel to the Y direction. The magnetization direction of the second magnet 2123 is opposite to that of the fourth magnet 2125 and can be parallel to the X direction.

[0240] For example, the first magnet 2122, the second magnet 2123, the third magnet 2124, and the fourth magnet 2125 can all be roughly rectangular block structures. This embodiment does not impose specific limitations on the shape of the multiple magnets of the second central magnet 212.

[0241] It is understood that the second central magnet 212 includes multiple magnets, which can be magnetized separately and then assembled to form the second central magnet 212, but are not limited to this.

[0242] Please continue to refer to the following: Figures 21 to 24 In some embodiments, the second side magnet 225 may include multiple magnets arranged around a first direction. The magnetization direction of the multiple magnets can be determined by the position of the magnets relative to the second central magnet 212, from the center of the second central magnet 212 towards the edge. In this case, the multiple magnets of the second side magnet 225 can be manufactured independently, thus facilitating the manufacture of the second side magnet 225 and making it easy to magnetize each magnet. The magnetization direction is easy to control, and therefore the overall magnetization direction of the second side magnet 225 is easy to control.

[0243] like Figure 21 The second side magnet 225 may include two magnets. These two magnets may be arranged opposite each other, and their arrangement direction may be the same as the short side direction of the second central magnet 212 to improve the utilization rate of the second central magnet 212. For example, the ends of the two magnets of the second side magnet 225 may be rounded and arranged opposite to a portion of the short side of the second central magnet 212 to further improve the utilization rate of the second central magnet 212.

[0244] like Figures 22 to 24 The second side magnet 225 may include four magnets. The four magnets are arranged in pairs facing each other, and each magnet corresponds to one of the four sides of the second central magnet 212. In this case, the shape of the second side magnet 225 is relatively simple, and its manufacture is easier.

[0245] It is understandable that the arrangement of the second central magnet 212 and the second side magnet 225 is not limited to... Figures 21 to 24 The settings of the embodiments can also be combined from the above embodiments. For example, they can be provided by... Figure 21 The second side magnet 225 in the embodiment and Figure 23 or Figure 24 The second central magnet 212 in the embodiment constitutes the first intermediate magnet layer 24.

[0246] Please refer to the following: Figure 25 and Figure 26 , Figure 25 This is a schematic diagram of the internal structure of another sound-generating unit 20 provided in this application. Figure 26 yes Figure 25 The diagram shows a simulation of the magnetic field of the sound-generating unit 20. Arrows represent magnetic field lines; the denser the arrows, the stronger the magnetic field. Figure 25The sound-emitting unit 20 shown in the embodiment may include Figure 18 Most of the technical features of the sound-generating unit 20 shown in the embodiment will not be repeated for the same technical features. The following mainly describes the differences between the two.

[0247] Figure 25 The sound-emitting unit 20 shown in the embodiment and Figure 18 The main difference in the sound-generating unit 20 shown in the embodiment lies in the arrangement of the first magnetic circuit assembly 2.

[0248] In some embodiments, the first central magnetic element 21 includes a first central magnet 211, a first central washer 214, and a third central magnet 213, which are stacked along the Z direction. The first side magnetic element 22 includes a first side magnet 224, a first side washer 227, and a third side magnet 226.

[0249] For example, the first center washer 214 and the first side washer 227 are not magnetic. The first center washer 214 and the first side washer 227 are magnetic.

[0250] For example, the magnetic pole arrangement and structural arrangement of the first central magnet 211, the third central magnet 213, the first side magnet 224, and the third side magnet 226 can be consistent with... Figure 18 The magnetic pole settings and structural settings of the corresponding magnets in the embodiment are the same, and will not be described again in this embodiment.

[0251] In this embodiment, since the first central washer 214 and the first side washer 227 are magnetically conductive, the first central washer 214 and the first side washer 227 can also enhance the magnetic field strength of the first magnetic gap 2a to a certain extent.

[0252] and Figure 18 The configuration of this embodiment significantly enhances the magnetic field strength of the first magnetic gap 2a, and, due to Figure 18 The embodiment employs a second central magnet 212 and a second side magnet 225. The second central magnet 212 and the second side magnet 225 have lower material density than the magnetically conductive structure (first central washer 214 and first side washer 227), which is beneficial for reducing the weight of the first magnetic circuit assembly 2, and thus for the lightweight design of the sound generating unit 20.

[0253] like Figure 26 In the first magnetic gap 2a, the magnetic field lines (red arrows in the figure) are mainly emitted by the first central magnetic element 21 and enter the first side magnetic element 22. Among them, the magnetic field lines are mainly emitted by the first central washer 214 and received by the first side washer 227. Therefore, the magnetic field line density and magnetic field are high between the first central washer 214 and the first side washer 227.

[0254] Compared to Figure 20 In this embodiment, the magnetic field strength between the first central washer 214 and the first side washer 227 is lower than that of the central washer 214. Figure 20 The embodiment describes the magnetic field strength between the second central magnet 212 and the second side magnet 225. Figure 26 In this embodiment, the magnetic field strength on the side of the first central magnetic element 21 away from the first magnetic gap 2a and the side closer to the first magnetic gap 2a is relatively small. The side of the first central magnetic element 21 away from the first magnetic gap 2a has more magnetic leakage, relatively lower acoustic frequency response, and relatively poor sound quality.

[0255] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0256] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0257] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sound emitting unit (20) characterized by, It includes a frame (1), a diaphragm (41), a first magnetic circuit assembly (2), and a first voice coil (42); The first magnetic circuit assembly (2) is fixed to the frame (1), the diaphragm (41) is arranged around the first magnetic circuit assembly (2), the inner periphery of the diaphragm (41) is fixedly connected to the first magnetic circuit assembly (2), the outer periphery of the diaphragm (41) is fixedly connected to the frame (1), the first voice coil (42) is fixedly connected to the vibrating part of the diaphragm (41), and the first voice coil (42) is located in the first magnetic gap (2a) of the first magnetic circuit assembly (2); The first magnetic circuit assembly (2) includes a first central magnetic element (21) and a first side magnetic element (22). The first side magnetic element (22) is disposed around the first central magnetic element (21), and the first central magnetic element (21) and the first side magnetic element (22) form the first magnetic gap (2a). The first central magnetic component (21) includes a first central magnet (211), a second central magnet (212), and a third central magnet (213) arranged along a first direction. The first direction is parallel to the axial direction of the first voice coil (42). The first central magnet (211) is fixedly connected to the frame (1). The third central magnet (213) is located on the side of the first central magnet (211) near the diaphragm (41). The magnetization directions of the first central magnet (211) and the third central magnet (213) are both parallel to the first direction and both point towards the second central magnet (212). The magnetization direction of the second central magnet (212) is parallel to the radial direction of the first voice coil (42) and points from the center of the second central magnet (212) to the periphery. The magnetization direction points from the south pole to the north pole or from the north pole to the south pole. And / or, the first side magnetic element (22) includes a first side magnet (224), a second side magnet (225) and a third side magnet (226) arranged along a first direction. The first side magnet (224) is fixedly connected to the frame (1), and the third side magnet (226) is located on the side of the first side magnet (224) close to the diaphragm (41). The magnetization directions of the first side magnet (224) and the third side magnet (226) are both parallel to the first direction and both point away from the second side magnet (225). The magnetization direction of the second side magnet (225) is parallel to the radial direction of the first voice coil (42) and points from the center of the second side magnet (225) to the periphery.

2. Sound emitting unit (20) according to claim 1, characterized in that The first central magnetic component (21) has a through hole in its middle part.

3. Sound emitting unit (20) according to claim 2, characterized in that The second central magnet (212) is a one-piece formed ring magnet.

4. Sound emitting unit (20) according to claim 1 or 2, characterized in that The second central magnet (212) includes a plurality of magnets, which are arranged around the first direction. The magnetization direction of the plurality of magnets in the second central magnet (212) is from the side closest to the center of the second central magnet (212) to the side closest to the periphery of the second central magnet (212).

5. The sound-generating unit (20) according to claim 4, characterized in that, The second central magnet (212) includes a first magnet (2122), a second magnet (2123), a third magnet (2124), and a fourth magnet (2125). The first magnet (2122) and the third magnet (2124) are arranged opposite to each other. The second magnet (2123) and the fourth magnet (2125) are arranged opposite to each other and located between the first magnet (2122) and the third magnet (2124). The length direction of the first magnet (2122) is parallel to the length direction of the first voice coil (42). Alternatively, the second central magnet (212) includes a first magnet (2122), a second magnet (2123), a third magnet (2124), and a fourth magnet (2125), with the first magnet (2122) and the third magnet (2124) arranged opposite to each other, the second magnet (2123) and the fourth magnet (2125) arranged opposite to each other, the first magnet (2122) and the third magnet (2124) located between the second magnet (2123) and the fourth magnet (2125), and the length direction of the first magnet (2122) being parallel to the length direction of the first voice coil (42).

6. The sound-generating unit (20) according to claim 1 or 2, characterized in that, The second side magnet (225) includes a plurality of magnets, which are arranged around the first direction. The magnetization direction of the plurality of magnets in the second side magnet (225) is from the center side near the second central magnet (212) to the periphery side near the second central magnet (212).

7. The sound-generating unit (20) according to claim 1 or 2, characterized in that, The thickness of the first voice coil (42) is greater than the thickness of the second central magnet (212), the first voice coil (42) surrounds the second central magnet (212), and surrounds a portion of the structure of the first central magnet (211) and a portion of the structure of the third central magnet (213); and / or The thickness of the first voice coil (42) is greater than the thickness of the second side magnet (225), the second side magnet (225) surrounds the first voice coil (42), and a portion of the structure of the first center magnet (211) and a portion of the structure of the third center magnet (213) surround the first voice coil (42).

8. The sound-generating unit (20) according to claim 1 or 2, characterized in that, The sound-generating unit (20) further includes a first top plate (8), which connects the diaphragm (41) and the first magnetic circuit assembly (2). The frame (1) includes a frame (11) and a first plate (12), which connects the frame (11) and the first magnetic circuit assembly (2). Both the first top plate (8) and the first plate body (12) are made of magnetically conductive material. The first top plate (8) and the first plate body (12) are located on opposite sides of the first magnetic circuit assembly (2). The first top plate (8) is fixedly connected to the first central magnetic component (21) and the first side magnetic component (22). The first plate body (12) is fixedly connected to the first central magnetic component (21) and the first side magnetic component (22).

9. The sound-generating unit (20) according to claim 1 or 2, characterized in that, The sound-generating unit (20) further includes a second magnetic circuit assembly (3) and a second voice coil (43). The second magnetic circuit assembly (3) is fixed to the frame (1). The diaphragm (41) is arranged around the second magnetic circuit assembly (3). The inner periphery of the diaphragm (41) is fixedly connected to the second magnetic circuit assembly (3), and the outer periphery of the diaphragm (41) is fixedly connected to the frame (1). The second voice coil (43) is fixedly connected to the vibrating part of the diaphragm (41). The second voice coil (43) is located in the second magnetic gap (3a) of the second magnetic circuit assembly (3). The second magnetic circuit assembly (3) includes a second central magnetic element (31) and a second side magnetic element (32). The second side magnetic element (32) is arranged around the second central magnetic element (31), and the second central magnetic element (31) and the second side magnetic element (32) form a second magnetic gap (3a). The second central magnetic component (31) includes a fourth central magnet (311), a fifth central magnet (312), and a sixth central magnet (313) arranged along a first direction. The fourth central magnet (311) is fixedly connected to the frame (1), and the sixth central magnet (313) is located on the side of the fourth central magnet (311) closer to the diaphragm (41). The magnetization directions of the fourth central magnet (311) and the sixth central magnet (313) are parallel to the first direction and both point towards the fifth central magnet (312). The magnetization direction of the fifth central magnet (312) is parallel to the radial direction of the second voice coil (43) and points from the center of the fifth central magnet (312) to the periphery. And / or, the second side magnetic element (32) includes a fourth side magnet (324), a fifth side magnet (325), and a sixth side magnet (326) arranged along a first direction. The fourth side magnet (324) is fixedly connected to the frame (1), and the sixth side magnet (326) is located on the side of the fourth side magnet (324) close to the diaphragm (41). The magnetization directions of the fourth side magnet (324) and the sixth side magnet (326) are both parallel to the first direction and both point away from the fifth side magnet (325). The magnetization direction of the fifth side magnet (325) is parallel to the radial direction of the second voice coil (43) and points from the center of the fifth side magnet (325) to the periphery.

10. The sound-generating unit (20) according to claim 9, characterized in that, The length direction of the first voice coil (42) and the length direction of the second voice coil (43) are parallel to the arrangement direction of the first voice coil (42) and the second voice coil (43).

11. The electronic device according to claim 9 or 10, characterized in that, The speaker module (300) further includes a flexible circuit board (51), which includes an outer ring portion (511), a first deformable portion (512), a first fixed portion (513), a second deformable portion (514), and a second fixed portion (515). The first deformable portion (512) is fixedly connected to the outer ring portion (511) and the first fixed portion (513), and the second deformable portion (514) is fixedly connected to the outer ring portion (511) and the second fixed portion (515). The outer ring (511) is fixed to the frame (1), the first fixing part (513) is fixedly connected to the first voice coil (42), and the second fixing part (515) is fixedly connected to the second voice coil (43).

12. The electronic device according to claim 11, characterized in that, The speaker module (300) further includes a first reinforcing member (52) and a second reinforcing member (53); the first reinforcing member (52) is fixedly connected to the outer ring portion (511) and the first fixing portion (513), and the second reinforcing member (53) is fixedly connected to the outer ring portion (511) and the second fixing portion (515).

13. A loudspeaker module (300), characterized in that, It includes a housing and a sound-generating unit (20) as claimed in any one of claims 1 to 12, the sound-generating unit (20) being fixed to the housing (10).

14. An electronic device (1000), characterized in that, It includes a housing (100) and a speaker module (300) as described in claim 13, the speaker module (300) being fixed inside the housing (100).

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