Sound-producing device and electronic device

Abstract

Disclosed in the present invention are a sound-producing device and an electronic device, the sound-producing device comprising a magnetic circuit system and a vibration system. The magnetic circuit system comprises a yoke plate, a first magnetic circuit portion and a second magnetic circuit portion, the first magnetic circuit portion being provided with a first magnetic gap, and the second magnetic circuit portion being arranged around part of the first magnetic circuit portion. The vibration system comprises a first vibration assembly and a second vibration assembly which vibrate perpendicular to each other, wherein the first vibration assembly comprises a first diaphragm and a first voice coil, the first voice coil being arranged in the first magnetic gap; and the second vibration assembly comprises a second diaphragm and a second voice coil, the second voice coil being a flat voice coil and having a central axis perpendicular to the second diaphragm. The second voice coil is provided with at least a first wire segment and a second wire segment which are arranged opposite each other and have opposite current directions; at least some of the magnetic induction lines of the second magnetic circuit portion pass through the first wire segment and the second wire segment in the direction of vibration of the first vibration assembly; and the directions of the magnetic induction lines passing through the first wire segment and the second wire segment are opposite.

Description

Sound-generating devices and electronic equipment Technical Field

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

[0002] With the development of the portable consumer electronics market, micro-sound devices have been widely used. Furthermore, the increasing multifunctionality and miniaturization of portable terminal electronic products have placed higher demands on the vibroacoustic performance of micro-sound generators. Currently, micro-speaker modules in smart mobile terminals have a narrow effective frequency band, a relatively monotonous timbre, and poor sound quality, and cannot meet various functional requirements.

[0003] Summary of the Invention

[0004] The main purpose of the present invention is to provide a sound-emitting device and an electronic device, aiming to provide a sound-emitting device in which vibration radiation surfaces are independent of each other and arranged at an angle. The sound-emitting device not only realizes multifunctional applications, but also effectively improves the sound effect and reduces the production cost.

[0005] To achieve the above object, the present invention provides a sound-generating device, comprising a housing, a magnetic circuit system and a vibration system connected to the housing.

[0006] The magnetic circuit system includes a yoke plate, a first magnetic circuit portion, and a second magnetic circuit portion. The yoke plate is flat. The first magnetic circuit portion and the second magnetic circuit portion are arranged on the same side of the yoke plate. The first magnetic circuit portion includes a central magnetic circuit and a side magnetic circuit. The side magnetic circuit is arranged outside the central magnetic circuit and is spaced from the central magnetic circuit to form a first magnetic gap. The second magnetic circuit portion is arranged on a side of the side magnetic circuit away from the central magnetic circuit.

[0007] The vibration system includes a first vibration component and a second vibration component arranged in a vertical vibration direction, wherein:

[0008] The first vibration component is opposite to the first magnetic circuit portion, and the first vibration component includes a first diaphragm and a first voice coil, one end of the first voice coil is connected to the first diaphragm, and the other end is suspended in the first magnetic gap;

[0009] The second vibration component is opposite to the second magnetic circuit part, and the second vibration component includes a second diaphragm and a second voice coil. The second voice coil is a flat voice coil and the central axis is perpendicular to the second diaphragm. The second voice coil and the second magnetic circuit part are spaced apart along the vibration direction of the second vibration component. The second voice coil has at least a first wire segment and a second wire segment that are relatively arranged. The current directions in the first wire segment and the second wire segment are opposite. At least part or at least part of the magnetic flux of the second magnetic circuit part passes through the first wire segment and the second wire segment along the vibration direction of the first vibration component, and the directions of the magnetic flux passing through the first wire segment and the second wire segment are opposite.

[0010] In one embodiment, the second magnetic circuit portion includes at least three magnetic regions, including a first magnetic region in the middle and second magnetic regions on both sides, and an arrangement direction of the three magnetic regions is parallel to the vibration direction of the first vibration component.

[0011] In one embodiment, the three magnetic regions are all magnetized along the vibration direction of the second vibration component, and the magnetization directions of the first magnetic region and the second magnetic region are opposite;

[0012] Alternatively, the first magnetic region is magnetized along the vibration direction of the second vibration component, the magnetization direction of the second magnetic region is perpendicular to the magnetization direction of the first magnetic region, and the magnetic pole of the second magnetic region on the side close to the first magnetic region is the same as the magnetic pole of the first magnetic region on the side close to the second voice coil.

[0013] In one embodiment, the second magnetic circuit portion includes a bar magnet, and the three magnetic regions are three magnetized regions of the bar magnet;

[0014] Alternatively, the second magnetic circuit portion includes three independent bar magnets, the arrangement direction of the three bar magnets is parallel to the vibration direction of the first vibration component, and the three bar magnets form the three magnetic regions accordingly;

[0015] Alternatively, the second magnetic circuit portion includes a ring magnet and a bar magnet, the central axis of the ring magnet is parallel to the central axis of the second voice coil, the bar magnet is arranged at the center of the ring magnet, the bar magnet forms the first magnetic zone, and the two opposite sides of the ring magnet form the second magnetic zone.

[0016] In one embodiment, a magnetic conductive plate is further provided on a side of the second magnetic circuit portion away from the second voice coil;

[0017] And / or, the outer shell includes a first shell and a second shell arranged at an angle, the first shell and the second shell enclose an installation cavity, the magnetic circuit system is arranged in the installation cavity, the first diaphragm is connected to the first shell, and the second diaphragm is connected to the second shell.

[0018] In one embodiment, the side magnetic circuit includes a first side magnetic circuit and a second side magnetic circuit, the first side magnetic circuit is located outside the central magnetic circuit and is spaced to form a first sub-gap, the second side magnetic circuit is located outside the central magnetic circuit and is spaced to form a second sub-gap, the first sub-gap is connected to the second sub-gap to form the first magnetic gap, and the second magnetic circuit portion is located on the side of the second side magnetic circuit away from the central magnetic circuit.

[0019] In one embodiment, along the vibration direction of the second vibration component, 0.5*the size of the first side magnetic circuit opposite to the second side magnetic circuit*the size of the second side magnetic circuit≤the size of the first side magnetic circuit opposite to the second side magnetic circuit;

[0020] And / or, along the vibration direction of the second vibration component, the size of the second magnetic circuit portion is ≤0.5*the size of the second side magnetic circuit.

[0021] In one embodiment, the first wire segment and the second wire segment are long axis segments of the second voice coil, and an arrangement direction of the first wire segment and the second wire segment is parallel to a vibration direction of the first vibration component;

[0022] And / or, the second diaphragm includes a second fold and a second reinforcement portion provided at the center of the second fold;

[0023] And / or, the second voice coil is formed by winding an enameled wire, or the second voice coil includes a coil structure formed by a circuit board and a conductive circuit arranged on the circuit board;

[0024] And / or, the second diaphragm is a planar diaphragm, and the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy;

[0025] And / or, the second diaphragm is a planar diaphragm, and a reinforcement portion is provided in a central area of ​​the second diaphragm.

[0026] In one embodiment, the first vibration component is used to produce low-pitched sounds, and the second vibration component is used to produce high-pitched sounds;

[0027] And / or, the size of the magnetic circuit system along the vibration direction of the first diaphragm is smaller than the size of the magnetic circuit system along the vibration direction of the second diaphragm.

[0028] The present invention further provides an electronic device, comprising a device housing and the above-mentioned sound-generating device, wherein the sound-generating device is arranged in the device housing.

[0029] The sound-generating device of the technical solution of the present invention is configured with a first vibration component and a second vibration component in a vibration system, so that the first vibration component is opposite to the magnetic circuit system, and the second vibration component is opposite to the magnetic circuit system. In this way, the magnetic circuit system is utilized to simultaneously provide a magnetic field and a driving force for the first vibration component and the second vibration component, so as to improve the utilization rate of the magnetic field while reducing the cost and size. The vibration direction of the first vibration component and the vibration direction of the second vibration component are further configured to be at an angle. In this way, the vibration system can form two independent vibration radiation surfaces that are set at an angle, which not only realizes multifunctional applications, but also effectively improves the sound-generating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] FIG1 is a schematic structural diagram of a sound-generating device according to an embodiment of the present invention;

[0032] FIG2 is a schematic structural diagram of a sound-generating device from another perspective according to an embodiment of the present invention;

[0033] FIG3 is an exploded schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0034] FIG4 is a cross-sectional schematic diagram of a sound-generating device in one embodiment of the present invention;

[0035] FIG5 is a schematic cross-sectional view of a portion of the structure of a sound-generating device according to an embodiment of the present invention;

[0036] FIG6 is a schematic diagram of a partial structure of a sound-generating device according to an embodiment of the present invention;

[0037] FIG7 is a schematic diagram of a partial structure of a sound-generating device according to an embodiment of the present invention;

[0038] FIG8 is a schematic diagram of a partial structure of a sound-generating device according to an embodiment of the present invention;

[0039] FIG9 is a schematic cross-sectional view of a portion of the structure of a sound-generating device according to an embodiment of the present invention;

[0040] FIG10 is a schematic cross-sectional view of a portion of the structure of a sound-generating device according to an embodiment of the present invention;

[0041] FIG11 is a schematic cross-sectional view of a portion of the structure of a sound-generating device according to an embodiment of the present invention;

[0042] FIG12 is a schematic cross-sectional view of a portion of the structure of a sound-generating device according to an embodiment of the present invention;

[0043] FIG13 is an enlarged schematic diagram of point D in FIG12;

[0044] FIG14 is a schematic structural diagram of a housing according to an embodiment of the present invention;

[0045] FIG15 is a schematic structural diagram of a sound-generating device from another perspective according to an embodiment of the present invention;

[0046] FIG16 is a perspective schematic diagram of a sound module with part of the module housing removed in accordance with an embodiment of the present invention;

[0047] FIG17 is an exploded schematic diagram of a sound module according to an embodiment of the present invention;

[0048] FIG18 is a schematic structural diagram of a lower housing of a sound module according to an embodiment of the present invention;

[0049] FIG19 is a plan view of a sound module according to an embodiment of the present invention;

[0050] FIG20 is a schematic cross-sectional view along line BB in FIG19;

[0051] FIG21 is a schematic cross-sectional view along line AA in FIG19 .

[0052] Description of Figure Numbers:

[0053] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0057] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] With the development of the portable consumer electronics market, micro-sound devices have been widely used. Furthermore, the increasing multifunctionality and miniaturization of portable terminal electronic products have placed higher demands on the vibroacoustic performance of micro-sound generators. Currently, micro-speaker modules in smart mobile terminals have a narrow effective frequency band, a relatively monotonous timbre, and poor sound quality, and cannot meet various functional requirements.

[0059] Based on the above concepts and problems, the present invention proposes a sound device 100. It is understood that the sound device 100 is applied to electronic devices, which may be mobile phones, speakers, computers, headphones, watches, or televisions, or applied to speaker modules, etc., without limitation.

[0060] Please refer to Figures 1 to 21. In an embodiment of the present invention, the sound-generating device 100 includes a magnetic circuit system 2 and a vibration system 3. The vibration system 3 includes a first vibration component 31 and a second vibration component 32. The first vibration component 31 is opposite to the magnetic circuit system 2, and the second vibration component 32 is opposite to the magnetic circuit system 2. The vibration direction of the first vibration component 31 is set at an angle to the vibration direction of the second vibration component 32.

[0061] The sound-generating device 100 of the present invention provides a vibration system 3 with a first vibration component 31 and a second vibration component 32, so that the first vibration component 31 is opposite to the magnetic circuit system 2, and the second vibration component 32 is opposite to the magnetic circuit system 2. In this way, the magnetic circuit system 2 is used to simultaneously provide a magnetic field and a driving force for the first vibration component 31 and the second vibration component 32, thereby improving the utilization rate of the magnetic field while reducing costs. The vibration direction of the first vibration component 31 and the vibration direction of the second vibration component 32 are further set at an angle, so that the vibration system 3 forms two independent vibration radiation surfaces set at an angle, not only achieving multifunctional applications but also effectively improving the sound effect. Optionally, the vibration directions of the first vibration component 31 and the second vibration component 32 are set perpendicularly.

[0062] In one embodiment, the sound-generating device 100 further includes a housing 1, which includes a first shell 12 and a second shell 13 arranged at an angle, the first shell 12 and the second shell 13 enclose a mounting cavity, the magnetic circuit system 2 is arranged in the mounting cavity, the first vibration component 31 is connected to the first shell 12 and is opposite to the magnetic circuit system 2, the second vibration component 32 is connected to the second shell 13 and is opposite to the magnetic circuit system 2, and the vibration direction of the first vibration component 31 is set at an angle to the vibration direction of the second vibration component 32. Optionally, the first shell 12 and the second shell 13 are an integrally molded structure, thereby improving the structural strength and stability of the housing 1. It can be understood that the first shell 12 and the second shell 13 enclose a mounting cavity, and the mounting cavity can be a through cavity or a through slot structure. Optionally, the first shell 12 and the second shell 13 are arranged vertically.

[0063] In this embodiment, the first housing 12 has a rectangular structure, having two opposing long sides and two opposing short sides. The ends of the short sides are connected to the two long sides, and the ends of the long sides are connected to the two short sides. It will be appreciated that the second housing 13 is connected to either the long side or the short side of the first housing 12, such that the second housing 13 is perpendicular to the first housing 12.

[0064] It is understood that the second shell 13 can be optionally a rectangular structure, with the second shell 13 having two opposing long sides and two short sides, with the ends of the short sides respectively connected to the two long sides, and the ends of the long sides respectively connected to the two short sides. In this embodiment, the first shell 12 and the second shell 13 share a long side or a short side, that is, the first shell 12 and the second shell 13 have a common side 14. The two long sides and two short sides of the first shell 12 define a first opening, and the two long sides and two short sides of the second shell 13 define a second opening, and the first opening and the second opening are respectively connected to the installation cavity. Optionally, the first opening and the second opening are located on two adjacent surfaces of the housing 1.

[0065] It should be noted that when the housing 1 is metal, the magnetic circuit system 2 is fixed to the housing 1 by bonding or welding. In another embodiment, when the housing 1 is plastic injection molded, the side magnetic conductive plate 235 of the magnetic circuit system 2 is first injection molded into the housing 1 as an insert, or the magnetic circuit system 2 is fixed to the housing 1 by bonding, and then the other parts are bonded and fixed, which is not limited here.

[0066] In this embodiment, the magnetic circuit system 2 is disposed within the mounting cavity of the housing 1 and is connected to the first shell 12 and the second shell 13 of the housing 1. The vibration system 3 is connected to the first shell 12 and the second shell 13 of the housing 1 and is opposite to the magnetic circuit system 2. As can be understood, the first vibration component 31 of the vibration system 3 is connected to the first shell 12 and covers the first opening, and the second vibration component 32 is connected to the second shell 13 and covers the second opening. In this way, the first shell 12 and the second shell 13 of the housing 1, the first vibration component 31 and the second vibration component 32, and the magnetic circuit system 2 together enclose a vibration space.

[0067] As will be appreciated, in this embodiment, the magnetic circuit system 2 provides a magnetic field and driving force for the first vibrating assembly 31 and the second vibrating assembly 32, allowing the first vibrating assembly 31 and the second vibrating assembly 32 to share the magnetic circuit system 2, thereby improving magnetic field utilization while reducing the cost of the sound-generating device 100. In this embodiment, the vibration direction of the first vibrating assembly 31 is perpendicular to the vibration direction of the second vibrating assembly 32.

[0068] The sound-generating device 100 of the present invention simplifies the design and assembly process of the sound-generating device 100 and facilitates production by configuring the outer shell 1 to be an angled first shell 12 and a second shell 13, which enclose a mounting cavity, and thereby utilizing the mounting cavity to mount a fixed magnetic circuit system 2 and a vibration system 3.

[0069] In one embodiment, the size of the magnetic circuit system 2 along the vibration direction of the first vibration component 31 is smaller than its size along the vibration direction of the second vibration component 32. This can reduce the size of the sound-generating device 100 and facilitate the miniaturized design of the sound-generating device 100.

[0070] In one embodiment, the magnetic circuit system 2 includes a yoke plate 21, a first magnetic circuit portion 22, and a second magnetic circuit portion 23. The first magnetic circuit portion 22 is disposed on the yoke plate 21 and defines a first magnetic gap 221. The second magnetic circuit portion 23 is disposed around a portion of the first magnetic circuit portion 22 and drives the second vibrating assembly 32 to vibrate. The second magnetic circuit portion 23 is disposed around a portion of the first magnetic circuit portion 22 and opposite the second vibrating system 3. This reduces the thickness (Z-axis) of the sound-generating device 100, facilitating flattening of the sound-generating device 100 and thinning of the electronic device.

[0071] Furthermore, the first magnetic circuit portion 22 includes a central magnetic circuit 222 and a side magnetic circuit 223. The side magnetic circuit 223 is disposed outside the central magnetic circuit 222 and spaced apart from the central magnetic circuit 222 to form a first magnetic gap 221. The first vibrating assembly 31 opposes the first magnetic circuit portion 22 and includes a first diaphragm 311 and a first voice coil 312. One end of the first voice coil 312 is connected to the first diaphragm 311, and the other end is suspended within the first magnetic gap 221. It will be understood that the first magnetic gap 221 surrounds the central magnetic circuit 222, and the first voice coil 312 is disposed around the central magnetic circuit 222.

[0072] Furthermore, the second magnetic circuit portion 23 is arranged on a side of the side magnetic circuit 223 away from the center magnetic circuit 222, and the second vibration component 32 is opposite to the second magnetic circuit portion 23. The second vibration component 32 includes a second diaphragm 321 and a second voice coil 323. The second voice coil 323 is a flat voice coil and the center axis is perpendicular to the second diaphragm 321. The second voice coil 323 is spaced apart from the second magnetic circuit portion 23 along the vibration direction of the second vibration component 32. The second voice coil 323 has at least a first wire segment 3231 and a second wire segment 3232 arranged opposite to each other. The current directions in the first wire segment 3231 and the second wire segment 3232 are opposite. At least part or at least part of the magnetic flux of the second magnetic circuit portion 23 passes through the first wire segment 3231 and the second wire segment 3232 along the vibration direction of the first vibration component 31, and the directions of the magnetic flux passing through the first wire segment 3231 and the second wire segment 3232 are opposite.

[0073] In this embodiment, the yoke plate 21 of the magnetic circuit system 2 provides a mounting and fixing base for the first magnetic circuit portion 22. The first magnetic circuit portion 22 can be bonded to the yoke plate 21. By providing a first magnetic gap 221 in the first magnetic circuit portion 22, the first magnetic gap 221 provides clearance and vibration space for the first voice coil. By positioning the second magnetic circuit portion 23 on a side of the side magnetic circuit 223 away from the center magnetic circuit 222 and configuring the second voice coil 323 as a flat voice coil with its central axis perpendicular to the second diaphragm 321, at least a portion, or at least a component, of the magnetic flux lines of the second magnetic circuit portion 23 passes through the first conductor segment 3231 and the second conductor segment 3232 along the vibration direction of the first vibrating assembly 31. This allows the second magnetic circuit portion 23 to provide driving force and vibration space for the second voice coil 323, while also making the structure of the entire magnetic circuit system 2 more compact and reducing its size.

[0074] In one embodiment, the second magnetic circuit portion 23 includes at least three magnetic regions, including a central first magnetic region 231 and two adjacent second magnetic regions 232. The three magnetic regions are arranged parallel to the vibration direction of the first vibrating assembly 31. This improves the utilization of the magnetic circuit system 2, increases the BL value of the second magnetic circuit portion 23, and enhances the sound performance of the second vibrating assembly 32.

[0075] As shown in FIG9 , all three magnetic regions are magnetized along the vibration direction of the second vibrating component 32, with the first magnetic region 231 and the second magnetic region 232 magnetized in opposite directions. Alternatively, as shown in FIG10 , the first magnetic region 231 is magnetized along the vibration direction of the second vibrating component 32, with the second magnetic region 232 magnetized in a direction perpendicular to that of the first magnetic region 231. Furthermore, the magnetic pole of the second magnetic region 232 on the side closest to the first magnetic region 231 is the same as the magnetic pole of the first magnetic region 231 on the side closest to the second voice coil 323. This allows the first and second wire segments 3231 and 3232 to vibrate in the same direction, cutting through the magnetic flux lines, thereby driving the second diaphragm 321 to vibrate and produce sound.

[0076] Alternatively, as shown in Figures 6 to 8 , the second magnetic circuit portion 23 includes a bar magnet 233, with the three magnetic zones representing the three magnetized regions of the bar magnet 233. Alternatively, the second magnetic circuit portion 23 includes three independent bar magnets 233, with the three bar magnets 233 arranged parallel to the vibration direction of the first vibrating assembly 31, and the three bar magnets 233 correspondingly forming three magnetic zones. Alternatively, the second magnetic circuit portion 23 includes a ring magnet 234 and a bar magnet 233, with the central axis of the ring magnet 234 parallel to the central axis of the second voice coil 323. The bar magnet 233 is positioned at the center of the ring magnet 234, forming the first magnetic zone 231, and the two opposing sides of the ring magnet 234 forming the second magnetic zone 232. It is understood that the bar magnet 233 has a simple structure and is easy to process, while the ring magnet 234 has a strong structural strength, improving its structural reliability. The second magnetic circuit portion 23 of the sound-generating device 100 can be arranged in various ways, allowing for flexibility during use.

[0077] In one embodiment, as shown in FIG4 , the second magnetic circuit portion 23 is disposed on the yoke plate 21 and is disposed on the same side of the yoke plate 21 as the first magnetic circuit portion 22. In this embodiment, the yoke plate 21 provides a mounting and fixing base for the first and second magnetic circuit portions 22, 23. The first and second magnetic circuit portions 22, 23 are disposed on the side of the yoke plate 21 facing the housing 1. The magnetic circuit system 2 is connected to the first and second shells 12, 13 of the housing 1 via the first and second magnetic circuit portions 22, 23.

[0078] It can be understood that the first magnetic circuit portion 22 and the second magnetic circuit portion 23 can be fixed to the yoke plate 21 by bonding or other methods, which is not limited here.

[0079] In one embodiment, as shown in FIG5 , a magnetic conductive plate 235 is further provided on a side of the second magnetic circuit portion 23 away from the second voice coil 323 , thereby further increasing the BL value of the second magnetic circuit portion 23 and the driving force on the second voice coil 323 .

[0080] In one embodiment, the yoke plate 21 is flat, making the shape of the sound device 100 more regular and enhancing the adaptability of the sound device 100 to different installation environments. Preferably, the outer surface of the yoke plate 21 away from the first vibration component 31 is flush with the outer surface of the housing 1.

[0081] In one embodiment, as shown in FIG5 , the second magnetic circuit portion 23 is larger than the first magnetic circuit portion 22 along the vibration direction of the first vibrating assembly 31. This arrangement of the second magnetic circuit portion 23 can fully utilize the height of the sound-generating device 100 along the vibration direction of the first vibrating assembly 31, thereby increasing the size of the magnetic region of the second magnetic circuit portion 23 and enhancing the driving force on the second voice coil 323.

[0082] In one embodiment, the side magnetic circuit 223 includes a first side magnetic circuit 223 and a second side magnetic circuit 223. The first side magnetic circuit 223 is located on the outside of the central magnetic circuit 222 and is spaced to form a first sub-gap 2211. The second side magnetic circuit 223 is located on the outside of the central magnetic circuit 222 and is spaced to form a second sub-gap 2212. The first sub-gap 2211 is connected to the second sub-gap 2212 to form a first magnetic gap 221. The second magnetic circuit portion 23 is located on the side of the second side magnetic circuit 2232 away from the central magnetic circuit 222.

[0083] It is understood that the side magnetic circuits 223 include multiple side magnetic circuits 223, which are arranged around the central magnetic circuit 222 and spaced apart from the central magnetic circuit 222 to form a first magnetic gap 221. The side magnetic circuits 223 include a first side magnetic circuit 2231 and a second side magnetic circuit 2232. For example, there are four side magnetic circuits 223: one second side magnetic circuit 2232 and three first side magnetic circuits 2231. It is understood that the three first side magnetic circuits 2231 are spaced apart outside the central magnetic circuit 222 and spaced apart from the central magnetic circuit 222 to form a first sub-gap 2211. The second side magnetic circuits 2232 are located on the side of the first common magnetic circuit facing away from the central magnetic circuit 222 and spaced apart to form a second sub-gap 2212. The first sub-gap 2211 and the second sub-gap 2212 are connected to form the first magnetic gap 221.

[0084] In this embodiment, the second magnetic circuit portion 23 is set only on the side of the second side magnetic circuit 2232 away from the central magnetic circuit 222. On the basis of meeting the magnetic circuit performance, the size of the sound-generating device 100 along the axial direction of the second voice coil 323 is further reduced, which is conducive to the miniaturization development of the sound-generating device 100.

[0085] Furthermore, as shown in FIG5 , along the vibration direction of the second voice coil 323, the size of the second side magnetic circuit 2232 is less than or equal to the size of the first side magnetic circuit 2231 opposite the second side magnetic circuit 2232, and greater than or equal to half the size of the first side magnetic circuit 2231 opposite the second side magnetic circuit 2232. This frees up installation space for the second magnetic circuit portion 23 without significantly increasing the size of the magnetic circuit system 2 along the vibration direction of the second voice coil 323, thereby leveraging the miniaturized design of the sound-generating device 100.

[0086] Optionally, along the axial direction of the second voice coil 323, that is, along the vibration direction of the second vibrating assembly 32, the size of the second magnetic circuit portion 23 is less than or equal to half the size of the second side magnetic circuit 2232. This provides sufficient driving force for the second voice coil 323 without increasing the size of the sound-generating device 100.

[0087] Optionally, as shown in FIG11 , a metal plate 236 is further provided on the side of the second magnetic circuit portion 23 away from the second voice coil 323. The metal plate 236 includes a bearing portion 2361 that supports the second magnetic circuit portion 23 and a fixing portion 2362 connected to the housing 1. The metal plate 236 is further connected to the housing 1 and supports the second magnetic circuit portion 23, thereby enhancing the connection strength between the second magnetic circuit portion 23 and the housing 1 and improving the installation reliability of the second magnetic circuit portion 23. Optionally, the metal plate 236 is made of a material such as stainless steel. Optionally, the fixing portion 2362 is bent and extended from the edge of the bearing portion 2361 toward the side where the second voice coil 323 is located, and the fixing portion 2362 is embedded in the housing 1.

[0088] In one embodiment, the fold of the first diaphragm 311 is recessed toward the magnetic circuit system 2, and the side of the second magnetic circuit portion 23 near the first diaphragm 311 is provided with a notch (not shown) to avoid the fold of the first diaphragm 311. As can be understood, in this embodiment, the second magnetic circuit portion 23 fully utilizes the height space of the sound-generating device 100 to maximize the height of the second magnetic circuit portion 23 while avoiding interference with the first vibrating assembly 31, thereby improving the sound quality and operational reliability of the sound-generating device 100.

[0089] In one embodiment, as shown in Figures 3, 6, and 8, the first and second wire segments 3231, 3232 form the long axis of the second voice coil 323. The first and second wire segments 3231, 3232 are arranged parallel to the vibration direction of the first vibrating assembly 31. The arrangement of the two long axis segments of the second voice coil 323 along the vibration direction of the first vibrating assembly 31 optimizes the structural design of the sound-generating device 100 and reduces its height, facilitating a thinner design.

[0090] As shown in Figures 3 and 4 , the yoke plate 21 is flat and has a recessed portion 211. The second magnetic circuit portion 23 is located in this recessed portion. The flat shape of the yoke plate 21 gives the sound-generating device 100 a more regular appearance and enhances its adaptability. The yoke can further include a recessed portion 211 to accommodate the second magnetic circuit portion 23. The height of the recessed portion 211 compensates for the thickness of the second magnetic portion, thereby increasing the driving force of the second magnetic circuit portion 23 on the second voice coil 323.

[0091] In one embodiment, the second diaphragm 321 is a planar diaphragm. The manufacturing process of a planar diaphragm is simple, reducing production costs. Optionally, the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy. These materials have high rigidity and low density, resulting in a lightweight planar diaphragm and improving the sound performance of the planar diaphragm. Further, optionally, a reinforcement portion is provided in the central region of the planar diaphragm to further increase the rigidity of the planar diaphragm and enhance its sound performance. The material of the reinforcement portion is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy. Flexible selection is available based on needs.

[0092] Optionally, the second diaphragm 321 includes a second fold ring and a second reinforcement portion 322 located at the center of the second fold ring. In this way, after the material and thickness of the second reinforcement portion 322 are determined, the width or material of the second fold ring can be further adjusted to adjust the resonance frequency to meet usage requirements.

[0093] As shown in Figures 3 and 4 , the first diaphragm 311 of the sound-generating device of the present application includes a first fold and a first reinforcement 314. The first reinforcement 314 is connected to the center of the first fold. The resonant frequency of the first diaphragm 311 can be adjusted to meet user requirements by adjusting the width or material of the first fold. Furthermore, the first voice coil 312 is an annular voice coil and is disposed around the central magnetic circuit 222.

[0094] In one embodiment, the aspect ratio of the inner diameter of the second voice coil 323 is ≤20 to reduce the difficulty of winding the second voice coil 323 . Optionally, the second voice coil 323 includes multiple second voice coils, each with an aspect ratio of ≤20, and the second voice coils 323 are distributed along the extension direction of the first wire segment 3231 . It is understood that when the sound-generating device has a relatively long dimension along the extension direction of the first wire segment 3231 , providing multiple second voice coils 323 and, accordingly, providing multiple bar magnets 233 or ring magnets 234 of the second magnetic circuit portion 23 can reduce the breakage rate of the bar magnets 233 or ring magnets 234 and improve the structural reliability.

[0095] In one embodiment, the second voice coil 323 is formed by winding enameled wire, or alternatively, the second voice coil 323 includes a coil structure formed by a circuit board and conductive traces arranged on the circuit board. Compared to conventional annular voice coils, flat voice coils have a smaller axial dimension, further reducing the space occupied by the sound-generating device 100 along the vibration direction of the second vibrating assembly 32.

[0096] In one embodiment, the yoke plate 21 is provided with an air vent 212 that communicates with the first magnetic gap 221. The sound-generating device 100 also includes an isolation net corresponding to the air vent 212. This ensures air pressure balance within the vibration space of the sound-generating device 100, thereby ensuring vibration balance between the first vibrating assembly 31 and the second vibrating assembly 32. Covering the air vent 212 with the isolation net prevents impurities or sound-absorbing particles from entering the sound-generating device 100 through the air vent 212 and potentially affecting its performance.

[0097] In one embodiment, the first vibration assembly 31 further includes a damper 313. One end of the damper 313 is connected to the first housing 12, and the other end of the damper 313 is connected to the end of the first voice coil 312 away from the first diaphragm 311. The damper 313 balances and stabilizes the vibration of the first voice coil 312, preventing it from swinging or polarizing.

[0098] Optionally, four centering dampers 313 are provided, corresponding to the four notches in the first magnetic circuit portion 22 of the magnetic circuit system 2. Alternatively, as shown in FIG3 , two centering dampers 313 are provided, one on each side of the minor axis of the first voice coil 312. In this embodiment, the centering damper 313 includes an outer fixing portion 2362, an inner fixing portion 2362, and an elastic portion connected between the outer fixing portion 2362 and the inner fixing portion 2362. The outer fixing portion 2362 is connected to the first shell 12 of the housing 1, and the inner fixing portion 2362 is connected to the first voice coil 312.

[0099] The centering support piece 313 can be made of PI material, or the centering support piece 313 can be made of FPCB, or a conductive circuit can be provided in the centering support piece 313, so that one end of the centering support piece 313 can be conductively connected to the lead of the first voice coil 312, and the other end of the centering support piece 313 is fixed on the housing 1 for connecting to the external circuit. In this way, the external circuit is connected to the first voice coil 312 by using the centering support piece 313, which effectively avoids the risk of the lead of the first voice coil 312 being broken during vibration.

[0100] In one embodiment, as shown in Figures 3, 6, 14, and 15, the outer end of the centering support 313 is connected to the surface of the first housing 12 facing away from the first diaphragm 311, and the inner end of the centering support 313 is connected to the end of the first voice coil 312 away from the first diaphragm 311. The inner end has a first inner solder pad electrically connected to the lead of the first voice coil 312, and the outer end has a first outer solder pad 3132 electrically connected to an external circuit. The housing 1 is provided with a conductive insert 15, which has a second inner solder pad 151 electrically connected to the second voice coil 323 and a second outer solder pad 152 electrically connected to the external circuit. The second inner solder pad 151 is exposed on the surface of the second housing 13 facing the second diaphragm 321, and the second outer solder pad 152 is exposed on the surface of the first housing 12 facing away from the first diaphragm 311. Furthermore, the first outer solder pad 3132 and the second outer solder pad 152 are located on the same side of the first housing 12. In this embodiment, the first external solder pad 3132 and the second external solder pad 152 are located on the same side of the first shell 12. When the first external solder pad 3132 and the second external solder pad 152 are electrically connected to an external electrical connector (such as a flexible circuit board), the design of the external electrical connector can be simplified and easy to implement.

[0101] In this embodiment, as shown in Figures 6 and 14 , a lead groove 132 is provided on the surface where the second housing 13 connects to the second diaphragm 321. The lead wires of the second voice coil 323 are led out through the lead groove 132 and then connected to the second inner pad 151. This routing of the lead wires of the second voice coil 323 through the lead groove 132 maintains the smoothness of the surface where the second housing 13 and the second diaphragm 321 are bonded, enhancing the bonding strength between the two and improving the waterproof performance of the second diaphragm 321.

[0102] As shown in Figures 14 and 15 , the first and second housings 12 and 13 share a common edge 14. Two conductive inserts 15 are included. One conductive insert 15 is located on this common edge 14, with its ends forming a second outer solder pad 152 exposed from the first housing 12 and a second inner solder pad 151 exposed from the second housing 13. The other conductive insert 15 has one end located on this common edge 14, forming a second inner solder pad 151 exposed from the second housing 13, and its other end extending along the edge of the first housing 12 to the side where the first outer solder pad 3132 is located. Embedding the conductive insert 15 in the housing 1 improves its installation reliability.

[0103] Optionally, the second housing 13 includes two alternating long sides and two short sides, and two second inner solder pads 151 are located at opposite ends of the second housing 13 along the direction in which one of the long sides extends. The outer edge of the second diaphragm 321 along the direction in which the long side extends is located inwardly of the two second inner solder pads 151. In other words, symmetrically arranging the two second inner solder pads 151 at opposite ends of the long sides of the second diaphragm 321 simplifies the design of the first solder pads and facilitates manufacturing when the housing 1 of the sound-generating device 100 is relatively small. Furthermore, a lead slot 132 is provided on the surface where the second housing 13 connects to the second diaphragm 321. The leads of the second voice coil 323 are routed through the lead slot 132 and then connected to the second inner solder pad 151. The second diaphragm 321 covers the lead slot 132.

[0104] To improve the waterproof performance of the sound-generating device 100 of the present invention, the outer edge of the first diaphragm 311 and the outer edge of the second diaphragm 321 are at least partially overlapped. Specifically, as shown in Figures 3 and 4, and Figures 12 and 13, the first housing 12 and the second housing 13 have a common edge 14, and the first diaphragm 311 and the second diaphragm 321 are both connected to the common edge 14. The outer edge of the first diaphragm 311 on the side closest to the second diaphragm 321 and the outer edge of the second diaphragm 321 on the side closest to the first diaphragm 311 are at least partially overlapped.

[0105] In one embodiment, the outer edge of the second diaphragm 321 has a second flange 3211 connected to the second housing 13. The second flange 3211, which is opposite the shared edge 14, at least partially overlaps the outer edge of the first diaphragm 311. The provision of the second flange 3211 can increase the bonding area between the second diaphragm 321 and the second housing 13, thereby improving the waterproof performance of the second diaphragm 321.

[0106] Optionally, a second sink 141 is provided on the common edge 14 corresponding to the second flange 3211, so that the thickness of the shell wall of the common edge 14 can be reduced. When the first diaphragm 311 and the second diaphragm 321 are both bonded to the common edge 14, the outer surface of the sound-emitting device 100 is smoother.

[0107] Optionally, the outer edge of the first diaphragm 311 close to the second diaphragm 321 is arranged between the common edge 14 and the second flange 3211. In this way, when external liquid enters the interior of the sound-emitting device 100, it needs to pass through the junction area between the second flange 3211 and the first diaphragm 311 and the junction area between the first diaphragm 311 or the second diaphragm 321 and the common edge 14. The path to enter the sound-emitting device 100 is extended and the risk of entering the interior of the sound-emitting device 100 is reduced.

[0108] Optionally, the outer edges of the two long sides of the second diaphragm 321 are provided with second flanges 3211, and the common edge 14 is opposite to the long sides of the second diaphragm 321. The second flanges 3211 on the long sides of the second diaphragm 321 are combined with the outer edges of the first diaphragm 311 to further improve the waterproof performance of the sound-generating device 100.

[0109] In another embodiment, the outer edge of the first diaphragm 311 has a first flange (not shown) connected to the first housing 12. The first flange, opposite the shared edge 14, at least partially overlaps the outer edge of the second diaphragm 321. The provision of the first flange can increase the bonding area between the first diaphragm 311 and the first housing 12, thereby improving the waterproof performance of the first diaphragm 311.

[0110] Optionally, a first sink (not shown in the figure) is provided on the common edge 14 corresponding to the first flange, so that the thickness of the shell wall of the common edge 14 can be reduced. When the first diaphragm 311 and the second diaphragm 321 are both bonded to the common edge 14, the outer surface of the sound-emitting device 100 is smoother.

[0111] Optionally, the outer edge of the second diaphragm 321 on the side closest to the first diaphragm 311 is positioned between the shared edge 14 and the first flange. This allows external liquid to enter the interior of the sound-generating device 100 through the junction area between the first flange and the second diaphragm 321, as well as the junction area between the first diaphragm 311 or the second diaphragm 321 and the shared edge 14. This extends the path through which liquid enters the sound-generating device 100, reducing the risk of liquid entering the interior of the sound-generating device 100.

[0112] In another embodiment, the outer edge of the second diaphragm 321 has a second flange 3211 connected to the second housing 13, and the outer edge of the first diaphragm 311 has a first flange connected to the first housing 12, and both the first flange 3211 and the second flange 3211 are connected to the common edge 14. The provision of the second flange 3211 can increase the bonding area between the second diaphragm 321 and the second housing 13, and the provision of the first flange can increase the bonding area between the first diaphragm 311 and the first housing 12, thereby improving the waterproof performance of the first diaphragm 311.

[0113] Optionally, a first flange, opposite the common edge 14, is provided between the common edge 14 and the second diaphragm 321, thereby extending the path for external liquid to enter the interior of the sound-generating device 100 from the bonding area between the first diaphragm 311 and the common edge 14. Alternatively, a second flange 3211, opposite the common edge 14, is provided between the first diaphragm 311 and the common edge 14, thereby extending the path for external liquid to enter the interior of the sound-generating device 100 from the bonding area between the second diaphragm 321 and the common edge 14. This is not a limitation and can be flexibly selected based on assembly requirements.

[0114] Optionally, the common edge 14 is provided with a first recessed platform corresponding to the first flange, or the common edge 14 is provided with a second recessed platform 141 corresponding to the second flange 3211, or the common edge 14 is provided with a first recessed platform corresponding to the first flange and a second recessed platform 141 corresponding to the second flange 3211. This can reduce the thickness of the housing wall of the common edge 14, and when both the first diaphragm 311 and the second diaphragm 321 are bonded to the common edge 14, the outer surface of the sound-generating device 100 is smoother.

[0115] In the sound-generating device 100 , the vibration direction of the first diaphragm 311 is perpendicular to the vibration direction of the second diaphragm 321 , which facilitates the installation of the first voice coil 312 and the second voice coil 323 , making the magnetic system more regular and facilitating production.

[0116] In this sound-generating device 100, the dimension of the sound-generating device 100 along the vibration direction of the first diaphragm 311 is smaller than the dimension of the sound-generating device 100 along the vibration direction of the second diaphragm 321. This results in a flat structure of the sound-generating device 100, which facilitates a thinner design when adapted for an application, improving the user experience.

[0117] In the sound-generating device 100 of the present invention, the first vibration component 31 is used for bass sounding, and the second vibration component 32 is used for treble sounding. In this way, the bandwidth of the sound-generating device 100 can be expanded, making the timbre of the sound-generating device 100 fuller and rounder.

[0118] As shown in Figures 16 to 21, the present invention also provides a sound module 400, which includes the above-mentioned sound device 100 and a module shell, wherein the module shell has a receiving space, and the sound unit is received in the receiving space, the module shell has a support wall 412 and a sound output part 411 connected to the support wall 412, the sound device 100 is provided with a first vibration component 31 on one side connected to the support wall 412, and the sound device 100 is provided with a second vibration component 32 on one side connected to the sound output part 411, and the sound output part 411 transmits the sound waves of the first vibration component 31 and the sound waves of the second vibration component 32 to the outside world.

[0119] In this embodiment, as shown in Figures 20 and 21, the sound-emitting device 100 is arranged in the receiving space and forms a rear sound cavity (not shown in the figures) between the sound-emitting device 100 and the module shell. The rear sound cavity can be further used to fill sound-absorbing particles, thereby effectively improving the low-frequency performance and acoustic performance of the sound-emitting module 400.

[0120] In this embodiment, by arranging the first vibration component 31 and the second vibration component 32 on the sound-emitting device 100, the vibration direction of the first vibration component 31 and the vibration direction of the second vibration component 32 are set at an angle, and the sound waves of the first vibration component 31 and the second vibration component 32 are radiated to the outside through the sound output part 411, thereby broadening the frequency band of the sound module 400 and making the sound of the sound module 400 richer and fuller.

[0121] Optionally, as shown in Figures 16 to 21, the sound-emitting portion 411 is located on the peripheral side of the module shell, the sound-emitting portion 411 is opposite to and connected to the second vibration component 32, and the sound waves of the second vibration component 32 are radiated outward through the sound-emitting portion 411. A first front cavity 40 is formed between the first vibration component 31 and the module shell, and the support wall 412 is provided with a first break 4121. The first front cavity 40 is connected to the sound-emitting portion 411 through the first break 4121. The sound waves of the first vibration component 31 are radiated outward through the first front cavity 40, the first break 4121, and the sound-emitting portion 411. In this way, the sound waves of the first vibration component 31 and the second vibration component 32 are both radiated to the outside world by the sound-emitting portion 411, broadening the frequency band of the sound module 400 and improving its sound effect. Optionally, a dustproof net is further provided on the sound-emitting portion 411 to prevent external dust or impurities from entering the interior of the sound-emitting portion 411 and affecting its sound effect.

[0122] As a specific embodiment, the sound outlet portion 411 has a first sound outlet channel 4111 and a second sound outlet channel 4112. The first sound outlet channel 4111 and the second sound outlet channel 4112 are isolated from each other. The first sound outlet channel 4111 is opposite to and connected to the second vibration component 32. The sound waves of the second vibration component 32 radiate outward through the first sound outlet channel 4111. The first break 4121 and the second sound outlet channel 4112 are connected. The sound waves of the first vibration component 31 radiate outward through the first front cavity 40, the first break 4121, and the second sound outlet channel 4112. It can be understood that the first sound outlet channel 4111 and the second sound outlet channel 4112 have a hollow structure. In this way, the sound emitted by the second vibration component 32 can be smoothly transmitted through the first sound outlet channel 4111, and the sound emitted by the first vibration component 31 can be smoothly transmitted through the second sound outlet channel 4112, thereby improving the sound effect of the sound module 400.

[0123] In this embodiment, the first sound outlet channel 4111 and the second sound outlet channel 4112 are isolated from each other, that is, the sound waves of the first vibration component 31 and the sound waves of the second vibration component 32 are radiated outward through different radiation paths. In this way, the space between the first vibration component 31 and the second vibration component 32 and the module shell is separated into different radiation paths, which can improve the high-frequency performance of the sound module 400.

[0124] Optionally, the second sound outlet channel 4112 includes two second sound outlet channels 4112, which are respectively arranged on opposite sides of the first sound outlet channel 4111. In this way, the first sound outlet channel 4111 can be directly opposite the second vibration component 32, so that the sound waves of the second vibration component 32 can be directly radiated to the outside world, thereby improving the high-frequency performance of the sound module 400. It can be understood that the first break 4121 and the first sound outlet channel 4111 are isolated from each other, and the first break 4121 is divided into two parts located on both sides of the first sound outlet channel 4111, each of which is connected to a corresponding second sound outlet channel 4112. Optionally, the second sound outlet channel 4112 and the first sound outlet channel 4111 are flared, and the diameter of the side away from the sound-emitting device 100 is larger than the diameter of the side close to the sound-emitting device 100. Of course, in other embodiments, there can also be one second sound outlet channel 4112, which is not limited here.

[0125] Optionally, a sound-guiding pipe 43 is provided between the sound-emitting portion 411 and the second vibration component 32. The sound-guiding pipe 43 is connected to the periphery of the second vibration component 32 and is correspondingly connected to the first sound outlet channel 4111. The sound waves of the second vibration component 32 radiate outward through the sound-guiding pipe 43 and the first sound outlet channel 4111. A first avoidance channel 44 is provided between the sound-emitting portion 411 and the sound-guiding pipe 43. The first avoidance channel 44 is opposite to and connected to the first break 4121. The sound waves of the first vibration component 31 radiate outward through the first front cavity 40, the first break 4121, the first avoidance channel 44, and the second sound outlet channel 4112. It can be understood that the sound-guiding pipe 43 has a hollow structure, so that the sound emitted by the second vibration component 32 can be smoothly transmitted through the sound-guiding pipe 43, thereby improving the sound effect of the sound module 400. It can be understood that the inner wall of the sound outlet portion 411 and the outer wall of the sound guide tube 43 are connected, and the first avoidance channel 44 is formed between the sound guide tube 43 and the sound outlet portion 411, specifically between the inner wall of the sound outlet portion 411 and the outer wall of the sound guide tube 43. As shown in Figure 18, the first avoidance channel 44 is formed by the inner wall forming the second sound outlet channel 4112 being recessed in a direction away from the second vibration component 32 relative to the inner wall forming the first sound outlet channel 4111. Of course, in other embodiments, the portion of the outer wall of the sound guide tube 43 corresponding to the second sound outlet channel 4112 can also be recessed in a direction close to the second vibration component 32 to form a first avoidance channel 44 connected to the first break 4121 between the two.

[0126] In this embodiment, a sound-conducting tube 43 is provided between the sound-emitting part 411 and the second vibration component 32, that is, a sound-conducting tube 43 is provided between the sound-emitting device 100 and the module shell. This facilitates the assembly and use of the sound-emitting device 100 by simply replacing the sound-conducting tube 43 to make the sound-emitting device 100 adapt to different assembly environments and match different module 400 shells 1. In this way, the appearance design of the sound-emitting device 100 can be liberated.

[0127] Optionally, as shown in Figures 17, 20, and 21, a sealing foam 45 is provided on the surface of the sound-conducting tube 43 away from the second vibration assembly 32. This improves the seal between the sound-conducting tube 43 and external components, thereby enhancing the sound quality of the sound module 400. It is understood that the sealing foam 45 is annular and has a first avoidance groove 451 that communicates with the second sound outlet channel 4112.

[0128] Optionally, the side of the sound-conducting tube 43 away from the second vibration component 32 is an inclined surface, that is, there is an angle between the inclined surface and the mounting surface of the second vibration component 32. This facilitates assembly between the sound-generating device 100 and the module housing. While the sound-generating device 100 is being assembled along the vibration direction of the first vibration component 31, the inclined surface of the sound-conducting tube 43 can also be tightened by force, thereby improving the operability of the sound-generating device 100 during assembly. Furthermore, the distance between the end of the inclined surface closest to the first vibration component 31 and the second vibration component 32 is smaller than the distance between the end of the inclined surface away from the first vibration component 31 and the second vibration component 32.

[0129] In one embodiment of the present invention, the module housing includes a module upper housing 42 and a module lower housing 41. The module lower housing 41 and the module upper housing 42 are connected and enclose a receiving space. The module lower housing 41 is provided with a support wall 412 and a sound-emitting portion 411. A rear sound cavity is formed between the module lower housing 41, the sound-emitting device 100, the module upper housing 42, and the module lower housing 41. In this embodiment, as shown in the figure, by configuring the module housing as a two-part structure of the module lower housing 41 and the module upper housing 42, the installation and fixation of the sound-emitting device 100 is facilitated. The module upper housing 42 and the module lower housing 41 can be fixed by bonding, welding, or other methods, which are not limited here.

[0130] The present application also provides an electronic device, which includes a device housing and a sound-generating device 100 of the present application. Specifically, the sound-generating device 100 has a crossover point F1. When the sound-generating device 100 is used in an electronic device, the Fh (front cavity resonance frequency) corresponding to the first vibration component 31 is greater than or equal to 4kHz and less than or equal to 7kHz, and F1>Fh. In this way, the phase mutation of the sound waves of the first vibration component 31 and the second vibration component 32 at the crossover point F1 can be avoided, ensuring that the vibration phases of the first vibration component 31 and the second vibration component 32 at the crossover point F1 are consistent, and the sound pressure of the sound-generating device 100 is stable.

[0131] Optionally, F1 is greater than or equal to 6kHz, so that the sound pressure level curve of the sound-generating device 100100 formed by the combination of the first vibration component 31 and the second vibration component 32 is relatively smooth, does not produce a large trough, and the listening experience is natural.

[0132] Furthermore, the crossover point F1 is greater than or equal to 6kHz and less than or equal to 10kHz, and the crossover point F1 can be 6kHz, 6.5KHz, 7kHz, 7.5kHz, 8kHz, 8.5kHz, 9kHz, 9.5kHz, 10kHz, etc. In this way, the sound pressure levels of the first vibration component 31 and the second vibration component 32 can be better connected at the crossover point, and the sound quality is richer and more natural. The bass of the sound-emitting device 100 in this embodiment is deep and powerful, and the treble is clear and rich. Since this electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be repeated here.

[0133] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises a housing and a magnetic circuit system and a vibration system connected to the housing. The magnetic circuit system includes a yoke plate, a first magnetic circuit part and a second magnetic circuit part, the yoke plate is in the shape of a flat plate, the first magnetic circuit part and the second magnetic circuit part are arranged on the same side of the yoke plate, the first magnetic circuit part includes a central magnetic circuit and a side magnetic circuit, the side magnetic circuit is arranged outside the central magnetic circuit and is spaced from the central magnetic circuit to form a first magnetic gap, and the second magnetic circuit part is arranged on a side of the side magnetic circuit away from the central magnetic circuit. The vibration system comprises a first vibration component and a second vibration component which are arranged vertically in vibration direction, wherein: The first vibration component is opposite to the first magnetic circuit portion, the first vibration component includes a first diaphragm and a first voice coil, one end of the first voice coil is connected to the first diaphragm, and the other end is suspended in the first magnetic gap; The second vibration component is opposite to the second magnetic circuit portion, the second vibration component includes a second diaphragm and a second voice coil, the second voice coil is a flat voice coil and the center axis is perpendicular to the second diaphragm, the second voice coil and the second magnetic circuit portion are spaced apart along the vibration direction of the second vibration component, the second voice coil has at least a first wire segment and a second wire segment that are relatively arranged, the current directions in the first wire segment and the second wire segment are opposite, the magnetic flux of the second magnetic circuit portion at least partially or at least partially passes through the first wire segment and the second wire segment along the vibration direction of the first vibration component, and the directions of the magnetic flux passing through the first wire segment and the second wire segment are opposite.

2. The sound-generating device according to claim 1, characterized in that: The second magnetic circuit portion includes at least three magnetic regions, the three magnetic regions include a first magnetic region in the middle and second magnetic regions on both sides, and the arrangement direction of the three magnetic regions is parallel to the vibration direction of the first vibration component.

3. The sound-generating device according to claim 2, characterized in that: The three magnetic regions are all magnetized along the vibration direction of the second vibration component, and the magnetization directions of the first magnetic region and the second magnetic region are opposite; Alternatively, the first magnetic region is magnetized along the vibration direction of the second vibration component, the magnetization direction of the second magnetic region is perpendicular to the magnetization direction of the first magnetic region, and the magnetic pole of the second magnetic region on a side close to the first magnetic region is the same as the magnetic pole of the first magnetic region on a side close to the second voice coil.

4. The sound-generating device according to claim 2, characterized in that: The second magnetic circuit portion includes a bar magnet, and the three magnetic regions are three magnetized regions of the bar magnet; Alternatively, the second magnetic circuit portion includes three independent bar magnets, the arrangement direction of the three bar magnets is parallel to the vibration direction of the first vibration component, and the three bar magnets form the three magnetic regions accordingly; Alternatively, the second magnetic circuit portion includes an annular magnet and a bar magnet, the central axis of the annular magnet is parallel to the central axis of the second voice coil, the bar magnet is arranged at the center of the annular magnet, the bar magnet forms the first magnetic zone, and the two opposite sides of the annular magnet form the second magnetic zone.

5. The sound-generating device according to claim 1, characterized in that: A magnetic conductive plate is also provided on a side of the second magnetic circuit portion away from the second voice coil; And / or, the outer shell includes a first shell and a second shell arranged at an angle, the first shell and the second shell enclose an installation cavity, the magnetic circuit system is arranged in the installation cavity, the first diaphragm is connected to the first shell, and the second diaphragm is connected to the second shell.

6. The sound-generating device according to claim 1, characterized in that: The side magnetic circuit includes a first side magnetic circuit and a second side magnetic circuit, the first side magnetic circuit is located outside the central magnetic circuit and is spaced to form a first sub-gap, the second side magnetic circuit is located outside the central magnetic circuit and is spaced to form a second sub-gap, the first sub-gap is connected to the second sub-gap to form the first magnetic gap, and the second magnetic circuit portion is located on the side of the second side magnetic circuit away from the central magnetic circuit.

7. The sound-generating device according to claim 6, characterized in that: Along the vibration direction of the second vibration component, 0.5*the size of the first side magnetic circuit opposite to the second side magnetic circuit*the size of the second side magnetic circuit≤the size of the first side magnetic circuit opposite to the second side magnetic circuit; And / or, along the vibration direction of the second vibration component, the size of the second magnetic circuit portion is ≤0.5*the size of the second side magnetic circuit.

8. The sound-generating device according to claim 1, characterized in that: The first wire segment and the second wire segment are long axis segments of the second voice coil, and the arrangement direction of the first wire segment and the second wire segment is parallel to the vibration direction of the first vibration component; And / or, the second diaphragm includes a second fold ring and a second reinforcement portion provided at the center of the second fold ring; And / or, the second voice coil is formed by winding an enameled wire, or the second voice coil includes a circuit A circuit board and a coil structure formed by conductive lines arranged on the circuit board; And / or, the second diaphragm is a planar diaphragm, and the material of the planar diaphragm is any one of PEN, LCP, PEEK, carbon paper, and magnesium-lithium alloy; And / or, the second diaphragm is a planar diaphragm, and a reinforcement portion is provided in a central area of ​​the second diaphragm.

9. The sound-generating device according to any one of claims 1 to 8, characterized in that: The first vibration component is used for producing bass sounds, and the second vibration component is used for producing treble sounds; And / or, a dimension of the magnetic circuit system along the vibration direction of the first diaphragm is smaller than a dimension of the magnetic circuit system along the vibration direction of the second diaphragm.

10. An electronic device, characterized in that: The device comprises a device housing and a sound-generating device as claimed in any one of claims 1 to 9, wherein the sound-generating device is arranged in the device housing.

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