Sound-generating devices and electronic equipment

Abstract

The present invention discloses a sound-generating device and electronic device. The sound-generating device includes a housing, a back cover, a magnetic circuit system, and a vibration system. The housing is a metal component having a cavity. The back cover is connected to one end of the housing and has a mounting opening formed on the back cover that communicates with the cavity. The magnetic circuit system is located at the mounting opening and is connected to the housing and the back cover. The magnetic circuit system has a magnetic gap. The magnetic circuit system, the back cover, and the housing together form a wiring cavity located outside the magnetic gap. The vibration system includes a diaphragm and a voice coil. The diaphragm is connected to the end of the housing facing away from the back cover and is opposite to and spaced from the magnetic circuit system. One end of the voice coil is connected to the diaphragm, and the other end is suspended within the magnetic gap. The voice coil has leads that extend from the magnetic gap into the wiring cavity. The present invention aims to provide a sound-generating device that is easy to process and assemble and reduces costs. The sound-generating device optimizes the routing of the voice coil leads, thereby preventing breakage of the voice coil leads and improving the stability of the voice coil lead connection.

Description

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, miniature sound-generating devices have been widely used. And with the multifunctional and miniaturized design of portable terminal electronic products, higher requirements are placed on the vibration and acoustic performance of miniature sounders.

[0003] A sound-generating device generally includes a housing and a magnetic circuit system and a vibration system housed in the housing. The housing is generally injection molded or a metal conductive part is integrally injection molded with a plastic part, resulting in a larger overall structure, complicated processing, and high production costs. Meanwhile, the vibration system includes a diaphragm and a voice coil attached to one side of the diaphragm. Typically, the voice coil's leads are connected to an external circuit via a centering support or other conductive parts, allowing the energized voice coil to vibrate the diaphragm under the action of the magnetic circuit system, thereby achieving sound generation by the sound-generating device. However, the voice coil's leads are typically suspended leads for electrical conduction, which is prone to the risk of wire breakage and can affect the acoustic performance of the sound-generating device as the voice coil vibrates. Summary of the Invention

[0004] The main purpose of the present invention is to provide a sound-generating device and an electronic device, aiming to provide a sound-generating device that is easy to process and assemble and reduces costs. The sound-generating device optimizes the routing of the voice coil lead, which can avoid the breakage of the voice coil lead and improve the stability of the voice coil lead connection.

[0005] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0006] A housing, wherein the housing is a metal part and has a cavity;

[0007] a rear cover connected to one end of the housing, the rear cover being formed with a mounting opening communicating with the cavity;

[0008] a magnetic circuit system, the magnetic circuit system being disposed at the mounting opening and connected to the housing and the rear cover, the magnetic circuit system being provided with a magnetic gap, the magnetic circuit system, the rear cover, and the housing enclosing a wiring cavity located outside the magnetic gap; and

[0009] A vibration system comprising a diaphragm and a voice coil, wherein the diaphragm is connected to an end of the housing facing away from the rear cover and is opposite to and spaced from the magnetic circuit system; one end of the voice coil is connected to the diaphragm and the other end is suspended in the magnetic gap; the voice coil has a lead, which is led out from the magnetic gap into the wiring cavity.

[0010] In one embodiment, the housing is further provided with a support arm, the support arm is located in the wiring cavity, the lead wire is led out from the magnetic gap to the wiring cavity, and is supported by the support arm.

[0011] In one embodiment, the housing includes a flat wall and a vertical wall arranged at an angle, the flat wall and the vertical wall enclosing a cavity, the rear cover being connected to an end of the vertical wall away from the flat wall, the support arm being formed by the vertical wall bending and extending toward the cavity, and being located between the flat wall and the rear cover;

[0012] The magnetic circuit system has a vertical portion spaced apart from the vertical wall, and the flat wall, the vertical wall, the back cover and the vertical portion cooperate to form the wiring cavity.

[0013] In one embodiment, the support arm includes a platform portion and an inclined portion connected to each other, the platform portion is connected to the vertical wall, and the inclined portion extends obliquely from the platform portion toward the wiring cavity;

[0014] The sound-generating device further includes a conductive member, which is arranged on the platform portion. The lead wire is supported by the support arm and connected to the conductive member.

[0015] In one embodiment, the distance between the inclined portion and the straight wall gradually decreases from an end adjacent to the platform portion to an end away from the platform portion;

[0016] And / or, one end of the lead wire adjacent to the conductive member is connected to the inclined portion via an adhesive layer, and the adhesive layer is a damping adhesive;

[0017] And / or, the conductive member is an FPCB.

[0018] In one embodiment, the voice coil has a long axis side and a short axis side connected end to end;

[0019] The lead wires include two, and each lead wire is arranged corresponding to one of the long axis sides;

[0020] The vertical wall is bent and extended corresponding to each of the long axis edges to form a support arm, and the flat wall, the vertical wall, the back cover and the vertical portion are enclosed corresponding to each of the long axis edges to form a wiring cavity;

[0021] Each of the lead wires is led out from the magnetic gap into a wiring cavity and supported by a support arm.

[0022] In one embodiment, the magnetic circuit system comprises:

[0023] A magnetically conductive yoke, the magnetically conductive yoke comprising a bottom and the vertical portion provided on the periphery of the bottom, the vertical portion and the bottom enclosing a receiving groove; and

[0024] A central magnetic circuit portion is disposed in the accommodating groove and spaced apart from the vertical portion to form the magnetic gap.

[0025] In one embodiment, the vertical portions include a plurality of vertical portions, which are spaced apart along the periphery of the bottom portion, and two adjacent vertical portions form a connecting gap, through which the wiring cavity is connected to the magnetic gap.

[0026] In one embodiment, the magnetic yoke further includes a positioning portion, which is formed by bending and extending the side of the vertical portion corresponding to the short axis side toward and away from the accommodating groove, and the positioning portion abuts against the vertical wall for limiting position.

[0027] In one embodiment, the vertical wall is further provided with a positioning notch corresponding to the short axis side, and the positioning portion is provided with a positioning protrusion corresponding to the positioning notch, and the positioning protrusion is accommodated and limited in the positioning notch;

[0028] And / or, a side of the straight wall corresponding to the short axis is bent and extended toward the cavity to form a positioning platform, and the positioning platform abuts against the positioning portion for positioning;

[0029] And / or, the side of the straight wall corresponding to the long axis edge is bent and extended toward the wiring cavity to form a limiting wall, the limiting wall is spaced and opposite to the vertical wall, and is staggered with the support arm, the limiting wall, the straight wall and the vertical wall are combined to form a limiting groove, the lead is led out from the magnetic gap into the limiting groove, and is supported on the support arm.

[0030] In one embodiment, the back cover includes a bottom wall and side walls arranged at an angle, the side walls are connected to the shell, and the bottom wall encloses the installation opening and is connected to the magnetic circuit system.

[0031] In one embodiment, a side of the bottom wall adjacent to the magnetic circuit system is bent and extended toward the wiring cavity to form a connecting arm, and the connecting arm is connected to the magnetic circuit system;

[0032] Alternatively, a limit platform is provided on a side of the magnetic circuit system facing away from the diaphragm, and an end of the bottom wall away from the side wall is limited to the limit platform.

[0033] In one embodiment, the bottom wall is provided with an air flow hole communicating with the wiring cavity.

[0034] In one embodiment, the rear cover is a U-shaped frame, and the rear cover encloses the mounting port and an opening communicating with the mounting port;

[0035] Alternatively, the rear cover is a square frame, and the rear cover is further provided with a communication port connected to the wiring cavity.

[0036] 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.

[0037] The sound-emitting device of the technical solution of the present invention is configured such that the shell is formed as a metal part by stamping the metal part, thereby effectively simplifying the processing steps of the shell and reducing the cost. A cavity is provided in the shell, thereby disposing the magnetic circuit system and the vibration system on the shell, thereby improving the installation stability of the magnetic circuit system and the vibration system. A magnetic gap is provided in the magnetic circuit system, and the diaphragm of the vibration system is connected to the shell, and is opposite to and spaced from the magnetic circuit system to enclose a vibration space. One end of the voice coil is connected to the diaphragm, and the other end is suspended in the magnetic gap. In this way, current is passed through the voice coil, thereby utilizing the voice coil to introduce current into the magnetic field formed by the magnetic circuit system. In this way, under the action of the magnetic circuit system, the voice coil drives the diaphragm to vibrate and produce sound. The magnetic circuit system, the back cover and the shell are further utilized to enclose a wiring cavity located outside the magnetic gap. In this way, when the magnetic circuit system is connected to the shell and the back cover at the installation opening of the back cover and is located in the cavity, the wiring cavity is located outside the magnetic gap, so that the lead of the voice coil is led out from the magnetic gap into the wiring cavity, thereby optimizing the routing method of the voice coil lead, avoiding the breakage of the voice coil lead during the vibration of the voice coil, improving the connection stability of the voice coil lead, and at the same time isolating the voice coil lead in the wiring cavity, thereby effectively avoiding the lead affecting the acoustic performance of the sound-generating device during the vibration of the voice coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] Figure 1 A schematic structural diagram of a sound-generating device according to an embodiment of the present invention;

[0040] Figure 2 A schematic structural diagram of a sound-generating device from another perspective in one embodiment of the present invention;

[0041] Figure 3 is an exploded schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0042] Figure 4is a schematic cross-sectional view of a sound-generating device along the minor axis in one embodiment of the present invention;

[0043] Figure 5 is a schematic cross-sectional view of a sound-generating device along the long axis in one embodiment of the present invention;

[0044] Figure 6 A schematic structural diagram of a sound-generating device in another embodiment of the present invention;

[0045] Figure 7 A schematic structural diagram of a sound-generating device from another perspective in another embodiment of the present invention;

[0046] Figure 8 is an exploded schematic diagram of a sound-generating device in another embodiment of the present invention;

[0047] Figure 9 is a schematic cross-sectional view of a sound-generating device along the minor axis in another embodiment of the present invention;

[0048] Figure 10 This is a schematic structural diagram of a housing in one embodiment of the present invention;

[0049] Figure 11 This is a schematic structural diagram of a back cover in one embodiment of the present invention;

[0050] Figure 12 Schematic diagram of the structure of the back cover in another embodiment of the present invention.

[0051] Description of Figure Numbers:

[0052] Label name Label name 100 Sound-generating device 226 Positioning protrusion 1 case 227 Limit table 11 cavity 23 Central magnetic circuit part 12 Support arm 231 Center magnet 121 Platform Department 232 Center Washer 122 Inclined portion 3 Vibration system 13 Straight wall 31 diaphragm 14 vertical wall 32 voice coil 141 Positioning notch 321 lead 15 Positioning stage 322 Long axis 16 Limiting wall 323 Short axis side 17 Wiring cavity 33 Dome 18 Limit slot 4 Conductive parts 2 Magnetic circuit system 5 back cover 21 Magnetic gap 51 Installation port 22 Magnetic yoke 52 bottom wall 221 bottom 53 sidewall 222 vertical part 54 Connecting arm 223 Container 55 airflow holes 224 Connectivity gap 56 Opening 225 Positioning unit 57 Connecting port

[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, miniature sound-generating devices have been widely used. And with the multifunctional and miniaturized design of portable terminal electronic products, higher requirements are placed on the vibration and acoustic performance of miniature sounders.

[0059] A sound-generating device generally includes a housing and a magnetic circuit system and a vibration system housed in the housing. The housing is generally injection-molded or a metal conductive part is integrally injection-molded with a plastic part, resulting in a larger overall structure, complicated processing, and high production costs. Meanwhile, the vibration system includes a diaphragm and a voice coil attached to one side of the diaphragm. Typically, the voice coil's leads are connected to an external circuit via a centering support or other conductive parts, allowing the energized voice coil to vibrate the diaphragm under the action of the magnetic circuit system, thereby achieving sound generation by the sound-generating device. However, the voice coil's leads are typically guided to the housing and connected to the conductive parts using suspended leads, which are prone to the risk of disconnection and can affect the acoustic performance of the sound-generating device as the voice coil vibrates.

[0060] Based on the above concepts and problems, the present invention proposes a sound-generating device 100. It is understandable that the sound-generating device 100 is applied to electronic devices, which may be mobile phones, speakers, computers, headphones, watches, or televisions, etc., without limitation herein.

[0061] Please refer to Figures 1 to 12As shown, in an embodiment of the present invention, the sound-generating device 100 includes a shell 1, a back cover 5, a magnetic circuit system 2 and a vibration system 3. The shell 1 is a metal part. The shell 1 has a cavity 11. The back cover 5 is connected to one end of the shell 1. The back cover 5 is formed with an installation port 51 connected to the cavity 11. The magnetic circuit system 2 is arranged at the installation port 51 and is connected to the shell 1 and the back cover 5. The magnetic circuit system 2 is provided with a magnetic gap 21. The magnetic circuit system 2, the back cover 5 and the shell 1 are enclosed to form a wiring cavity 17 located outside the magnetic gap 21. The vibration system 3 includes a diaphragm 31 and a voice coil 32. The diaphragm 31 is connected to one end of the shell 1 facing away from the back cover 5, and is opposite to and spaced from the magnetic circuit system 2. One end of the voice coil 32 is connected to the diaphragm 31, and the other end is suspended in the magnetic gap 21. The voice coil 32 has a lead 321, and the lead 321 is led out from the magnetic gap 21 to the wiring cavity 17.

[0062] In this embodiment, the shell 1 is used to install, fix, support and protect components such as the vibration system 3, the magnetic circuit system 2 and the back cover 5, that is, the shell 1 provides an installation base for components such as the vibration system 3, the magnetic circuit system 2 and the back cover 5. It can be understood that the shell 1 can be a mounting shell, a shell or a box body with a mounting cavity, that is, the shell 1 defines a receiving space, that is, the shell 1 has a cavity 11, which is not limited here. Optionally, the shell 1 is a rectangular structure, and the shell 1 has two opposite long sides and two short sides, the two ends of the short side are respectively connected to the two long sides, and the two ends of the long side are respectively connected to the two short sides, so that the shell 1 defines the cavity 11. The shell 1 can also be a circular structure or other structure, suitable for different terminals.

[0063] As can be understood, the housing 1 is a metal part. By setting the housing 1 as a metal housing solution, the housing 1 can be processed by a stamping process, which not only significantly reduces costs but also effectively simplifies the processing steps of the housing 1. In this embodiment, the magnetic circuit system 2 and the housing 1 can be fixed by bonding or welding.

[0064] In this embodiment, the housing 1 has a cavity 11 that is open at both ends. By attaching a rear cover 5 to one end of the housing 1, forming a mounting opening 51 in communication with the cavity 11, and positioning the magnetic circuit system 2 within the mounting opening 51 to cover the mounting opening 51, the magnetic circuit system 2 is connected to the housing 1 and the rear cover 5, thereby allowing the rear cover 5 and the magnetic circuit system 2 to cooperatively cover the opening at one end of the cavity 11. The magnetic circuit system 2 is provided with a magnetic gap 21. The vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31. One end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is suspended within the magnetic gap 21. By introducing current from an external circuit into the voice coil 32, the voice coil 32 transfers electrical energy to the magnetic gap 21 of the magnetic circuit system 2. The magnetic field generated by the magnetic circuit system 2 converts the electrical energy into mechanical energy, thereby causing the voice coil 32 to vibrate, which in turn drives the diaphragm 31 to vibrate and produce sound, further converting the mechanical energy into acoustic energy.

[0065] It can be understood that after the voice coil 32 arranged in the magnetic gap 21 receives the external changing AC signal, it is driven by the magnetic field force of the magnetic circuit system 2 to make a reciprocating movement of cutting the magnetic lines of force, driving the diaphragm 31 of the vibration system 3 to vibrate and make sound, thereby effectively improving the BL value of the sound-producing device 100.

[0066] It should be noted that the voice coil 32 has a lead 321, through which the voice coil 32 receives an external alternating current signal. In related art, the lead 321 of the voice coil 32 is typically attached to the surface of the diaphragm, and a conductive insert is injection-molded into the plastic housing to introduce external current into the lead 321 of the voice coil 32 through the conductive insert. Alternatively, a structure such as a centering support is provided, the centering support is fixed to the end of the voice coil 32 located within the magnetic gap 21, and the lead 321 is welded to the centering support. This not only secures the voice coil 32 with the centering support, but also introduces external current into the lead 321 of the voice coil 32 through the centering support. However, these methods not only increase processing costs and complicate the assembly process, but also, when the lead 321 vibrates with the voice coil 32, the shaking of the lead 321 can affect the vibration effect of the diaphragm 31, thereby affecting the acoustic performance of the sound-generating device 100.

[0067] In this embodiment, if Figure 4 and Figure 9 As shown, the wiring cavity 17 located outside the magnetic gap 21 is formed by enclosing the magnetic circuit system 2, the back cover 5 and the shell 1. The wiring cavity 17 can not only be used to isolate the lead 321, but also be used to protect the lead 321 to prevent the lead 321 from being exposed, thereby optimizing the wiring method of the lead 321 of the voice coil 32, avoiding the lead 321 of the voice coil 32 from breaking during the vibration of the voice coil 32, improving the connection stability of the lead 321 of the voice coil 32, and isolating the lead 321 of the voice coil 32 in the wiring cavity 17, thereby effectively preventing the lead from vibrating with the voice coil 32 and affecting the acoustic performance of the sound-generating device 100.

[0068] The sound-generating device 100 of the present invention is configured such that the shell 1 is formed into the shell 1 by stamping the metal part, thereby effectively simplifying the processing steps of the shell 1 and reducing the cost. A cavity 11 is provided in the shell 1, thereby providing the magnetic circuit system 2 and the vibration system 3 on the shell 1, so as to improve the installation stability of the magnetic circuit system 2 and the vibration system 3. A magnetic gap 21 is provided in the magnetic circuit system 2, and the diaphragm 31 of the vibration system 3 is connected to the shell 1, and is opposite to and spaced from the magnetic circuit system 2 to enclose a vibration space. One end of the voice coil 32 is connected to the diaphragm 31, and the other end is suspended in the magnetic gap 21. In this way, current is passed through the voice coil 32, thereby using the voice coil 32 to introduce current into the magnetic field formed by the magnetic circuit system 2. In this way, under the action of the magnetic circuit system 2, the voice coil 32 drives the diaphragm 31 to vibrate and produce sound. The magnetic circuit system 2, the back cover 5 and the shell 1 are further utilized to enclose a wiring cavity 17 located outside the magnetic gap 21. In this way, when the magnetic circuit system 2 is connected to the shell 1 and the back cover 5 at the installation opening 51 of the back cover 5 and is located in the cavity 11, the wiring cavity 17 is located outside the magnetic gap 21, so that the lead 321 of the voice coil 32 is led out from the magnetic gap 21 into the wiring cavity 17, thereby optimizing the routing method of the lead of the voice coil 32, avoiding the breakage of the lead 321 of the voice coil 32 during the vibration of the voice coil 32, improving the connection stability of the lead 321 of the voice coil 32, and at the same time isolating the lead of the voice coil 32 in the wiring cavity 17, thereby effectively avoiding the lead 321 affecting the acoustic performance of the sound-generating device 100 during the vibration of the voice coil 32.

[0069] In one embodiment, the diaphragm 31 includes a central portion, a folded ring portion surrounding the central portion, and a fixed portion provided outside the folded ring portion, wherein the fixed portion is connected to the housing 1. Figure 1 、 Figures 3 to 6 、 Figure 8 and Figure 9 As shown, the central portion, fold, and fixed portion of the diaphragm 31 are integrally formed. The fold surrounds the central portion and is located between the central portion and the fixed portion. The fold can be an upward or downward raised structure. The diaphragm 31 is connected and fixed to the housing 1 of the sound-generating device 100 via the fixed portion, improving the stability and sealing of the connection between the housing 1 and the diaphragm 31.

[0070] It is understandable that in order to increase the effective vibration area of ​​the diaphragm 31 , the fixing portion may be formed by extending downward or upward from the outer side of the folding ring portion so that the fixing portion is connected and fixed to the inner wall or outer wall of the housing 1 .

[0071] In one embodiment, if Figure 1 、 Figures 3 to 6 、 Figure 8 and Figure 9As shown, a hollow hole is provided in the central portion, and the vibration system 3 also includes a dome 33, which is connected to the central portion and covers the hollow hole. It can be understood that by providing a hollow hole in the central portion of the diaphragm 31, the overall weight of the diaphragm 31 can be effectively reduced. Optionally, a hollow hole is provided at the central position of the central portion, and the hollow hole can be a through hole, a hollow hole, or an opening. Optionally, there can be one or more hollow holes, which is not limited here.

[0072] In order to strengthen the structural strength of the diaphragm 31 and prevent the diaphragm 31 from shrinking and deforming more during the vibration process, a dome 33 is provided in the central part of the diaphragm 31. The dome 33 is connected to the central part and covers the hollow hole. On the one hand, the structural strength of the diaphragm 31 is strengthened, and on the other hand, external impurities or dust are prevented from entering the interior of the sound-emitting device 100 through the hollow hole. At the same time, the diaphragm 31 is prevented from shrinking and deforming more during the vibration process, thereby reducing the THD distortion of the sound-emitting device 100 and improving the audio effect.

[0073] In one embodiment, the housing 1 is further provided with a support arm 12 . The support arm 12 is located in the wiring cavity 17 . The lead wire 321 is led out from the magnetic gap 21 to the wiring cavity 17 and supported by the support arm 12 .

[0074] In this embodiment, if Figure 2 、 Figure 3 、 Figure 4 、 Figures 8 to 10 As shown, by providing a support arm 12 on the metal housing 1, the support arm 12 is positioned within the cavity 11. When the magnetic circuit system 2 is connected to the housing 1 and positioned within the cavity 11, the support arm 12 is positioned outside the magnetic gap 21, that is, within the wiring cavity 17. Thus, when the voice coil 32 is suspended within the magnetic gap 21, the lead wire 321 of the voice coil 32 is led from the magnetic gap 21 into the wiring cavity 17 and supported by the support arm 12. The support arm 12 thus supports and secures the lead wire 321, preventing it from breaking during vibration, improving the connection stability of the lead wire 321, and reducing the risk of disconnection. The positioning of the support arm 12 outside the magnetic gap 21 also prevents interference between the lead wire and components such as the body of the voice coil 32 during vibration.

[0075] It should be noted that in order to ensure that the lead wire 321 has a certain amount of space for movement during the vibration of the voice coil 32, one end of the lead wire 321 connected to the voice coil 32 is located in the magnetic gap 21, and is led from the magnetic gap 21 to the wiring cavity 17 and supported on the support arm 12, that is, the lead wire 321 is suspended before being supported by the support arm 12 to one end of the voice coil 32. In this way, during the vibration of the voice coil 32, the lead wire 321 vibrates with the voice coil 32, thereby effectively avoiding the connection between the lead wire 321 and the support arm 12, which causes the lead wire 321 to break.

[0076] In one embodiment, support arm 12 is positioned opposite the lead wire 321's exit point. After exiting magnetic gap 21, lead wire 321 is guided through wiring cavity 17 to support arm 12. A certain distance separates support arm 12 from the lead wire 321's exit point, ensuring sufficient lead wire 321's exit length. This further ensures sufficient compliance, preventing the risk of lead wire 321 being pulled and broken during the vibration of voice coil 32. The exit point can, understandably, be formed by providing a notch or groove in magnetic circuit system 2 or housing 1.

[0077] In one embodiment, the lead wire 321 is supported on the side of the support arm 12 facing away from the diaphragm 31. That is, the lead wire 321 is supported on the outer surface of the support arm 12. This makes securing the lead wire 321 easy and facilitates assembly. The lead wire 321 can be secured to the support arm 12 using damping adhesive. The damping adhesive is a soft adhesive such as silicone or rubber. This adhesive layer not only secures the lead wire 321 to the support arm 12 but also ensures a certain degree of freedom for the lead wire 321, thereby damping the vibration transmitted from the voice coil 32 to the lead wire 321.

[0078] As will be appreciated, a certain distance exists between the lead wire 321 and the voice coil 32 and the support arm 12 to ensure that the lead wire 321 can move. Furthermore, to prevent the lead wire 321 from swinging while suspended in the air with the vibration of the voice coil 32, thereby affecting the acoustic performance of the sound-generating device 100, the lead wire 321 is fixed to the support arm 12 at one end away from the voice coil 32, thereby reducing the length of the suspended lead wire 321. This effectively prevents the lead wire 321 from swinging while suspended in the air with the vibration of the voice coil 32, thereby affecting the acoustic performance of the sound-generating device 100. Furthermore, the lead wire 321 is isolated by the wiring cavity 17 formed by the magnetic circuit system 2, the rear cover 5, and the housing 1, thereby not only protecting the lead wire 321 but also preventing the lead wire 321 from vibrating with the voice coil 32, thereby affecting the acoustic performance of the sound-generating device 100.

[0079] In this embodiment, in order to prevent the lead wire 321 from being completely unable to move when connected to the support arm 12, resulting in the lead wire 321 being broken due to the hard connection between the lead wire 321 and the support arm 12 during the vibration of the voice coil 32, an adhesive layer is used to connect the lead wire 321 to the support arm 12. Optionally, the adhesive layer is a damping adhesive, and the damping adhesive is a soft adhesive such as silicone, rubber, etc. The adhesive layer can not only fix the lead wire 321 to the support arm 12, but also ensure that the lead wire 321 has a certain degree of freedom, thereby buffering the vibration transmitted to the lead wire 321 by the voice coil 32.

[0080] It can be understood that by further providing a support arm 12 located in the cavity 11 on the shell 1, when the magnetic circuit system 2 is connected to the shell 1 and located in the cavity 11, the support arm 12 is located outside the magnetic gap 21, so that the lead 321 of the voice coil 32 is led out from the magnetic gap 21 to the wiring cavity 17 and supported on the support arm 12, thereby avoiding the lead 321 of the voice coil 32 from breaking during the vibration of the voice coil 32, improving the connection stability of the lead 321 of the voice coil 32, and avoiding the risk of the lead 321 of the voice coil 32 breaking.

[0081] In one embodiment, the shell 1 includes a flat wall 13 and a vertical wall 14 arranged at an angle, the flat wall 13 and the vertical wall 14 enclose a cavity 11, the back cover 5 is connected to the end of the vertical wall 14 away from the flat wall 13, the support arm 12 is formed by the vertical wall 14 bending and extending toward the cavity 11, and is located between the flat wall 13 and the back cover 5; the magnetic circuit system 2 has a vertical portion 222 separated from the vertical wall 14, and the flat wall 13, the vertical wall 14, the back cover 5 and the vertical portion 222 cooperate to form a wiring cavity 17.

[0082] In this embodiment, if Figures 1 to 10 As shown, the housing 1 has a square frame structure and includes a flat wall 13 and a vertical wall 14 arranged at an angle. Optionally, the vertical wall 14 is formed by bending and extending one side of the flat wall 13. The vertical wall 14 and the flat wall 13 are arranged perpendicular to each other to enclose the cavity 11. The support arm 12 is disposed at one end of the vertical wall 14 away from the flat wall 13. Optionally, the support arm 12 is formed by bending and extending the vertical wall 14 toward the cavity 11, and is opposite and spaced from the flat wall 13.

[0083] It can be understood that the side of the straight wall 13 facing away from the vertical wall 14 is connected and fixed to the fixed portion of the diaphragm 31. Optionally, the straight wall 13 and the fixed portion of the diaphragm 31 are connected and fixed by bonding. The back cover 5 is connected to the end of the vertical wall 14 away from the straight wall 13, and encloses to form a mounting opening 51. When the magnetic circuit system 2 is installed in the mounting opening 51, the vertical portion 222 of the magnetic circuit system 2 is located on the inner side of the vertical wall 14 and is spaced apart from the vertical wall 14, so that the straight wall 13, the vertical wall 14, the back cover 5 and the vertical portion 222 cooperate to form a wiring cavity 17, so that the wiring cavity 17 can be used to achieve the routing limitation of the lead wire 321 and to space the wiring cavity 17 from the magnetic gap 21, thereby further preventing the lead wire 321 from affecting the vibration of the voice coil 32.

[0084] It should be noted that by providing the back cover 5, the back cover 5 is used to cover the opening of the wiring cavity 17, so as to shield the lead 321 while protecting the lead 321, which can not only improve the aesthetic performance, but also adjust the airflow in the vibration space through the back cover 5 to control the acoustic performance of the sound-emitting device 100.

[0085] Optionally, the flat wall 13 and the vertical wall 14 of the housing 1 are an integrally formed structure, that is, they are formed by a stamping or bending process.

[0086] In one embodiment, the support arm 12 includes a platform portion 121 and an inclined portion 122 connected to each other, the platform portion 121 is connected to the vertical wall 14, and the inclined portion 122 extends obliquely from the platform portion 121 toward the wiring cavity 17; the sound-emitting device 100 also includes a conductive part 4, the conductive part 4 is provided on the platform portion 121, and the lead 321 is supported on the support arm 12 and connected to the conductive part 4.

[0087] In this embodiment, if Figure 2 、 Figure 3 、 Figure 8 and Figure 10 As shown, by setting the support arm 12 as a connected platform portion 121 and an inclined portion 122, the platform portion 121 is connected to the vertical wall 14, that is, the platform portion 121 is formed by bending and extending the vertical wall 14, and the inclined portion 122 is formed by extending one end of the platform portion 121 into the wiring cavity 17.

[0088] Optionally, the inclined portion 122 extends obliquely from the platform portion 121 toward the interior of the wiring cavity 17. Specifically, the inclined portion 122 extends from the platform portion 121 along the interior of the wiring cavity 17 and toward the end of the lead wire 321 connected to the voice coil 32. Alternatively, the inclined portion 122 may be suspended. As will be appreciated, by providing the inclined portion 122 with an inclined structure, the lead wire 321 can be guided more smoothly toward the platform portion 121, avoiding sharp bends in the lead wire 321 and ensuring the compliance of the lead wire 321.

[0089] As will be appreciated, the platform portion 121 of the support arm 12 is located at the end of the vertical wall 14 away from the end where the lead wire 321 connects to the voice coil 32. The platform portion 121 is provided so that the conductive member 4 can be mounted and fixed thereto, thereby ensuring a stable connection between the conductive member 4 and the lead wire 321. In this embodiment, after the lead wire 321 is connected to the conductive member 4, to ensure a stable connection and prevent breakage that could result in poor conduction, the lead wire 321 is secured to the end of the inclined portion 122 near the platform portion 121, thereby ensuring a stable connection between the lead wire 321 and the conductive member 4.

[0090] Optionally, the distance between the inclined portion 122 and the straight wall 13 gradually decreases from the end adjacent to the platform portion 121 to the end away from the platform portion 121. It can be understood that the end of the lead 321 adjacent to the conductive member 4 is connected to the inclined portion 122 through an adhesive layer, which can be a damping adhesive.

[0091] In this embodiment, the lead 321 is connected to the side of the inclined portion 122 facing away from the straight wall 13, and the conductive member 4 is fixed to the side of the platform portion 121 facing away from the straight wall 13. Optionally, the conductive member 4 is an FPCB. The conductive member 4 can be fixed to the platform portion 121 by bonding.

[0092] Optionally, the straight wall 13 and the vertical wall 14 of the housing 1 and the platform portion 121 and the inclined portion 122 of the support arm 12 are an integrally formed structure, that is, formed by a stamping or bending process.

[0093] In one embodiment, if Figure 3 and Figure 8 As shown, the voice coil 32 has a long axis side 322 and a short axis side 323 connected end to end. Optionally, the voice coil 32 is a rectangular ring structure, that is, the two long axis sides 322 and the two short axis sides 323 of the voice coil 32 are alternately connected to form a ring structure connected end to end. To ensure that external current can flow into the voice coil 32, the voice coil 32 includes two leads 321, that is, the voice coil 32 has two leads 321. For example, the voice coil 32 has an input lead and an output lead. This facilitates the introduction of external current into the voice coil 32 through the conductive member 4 from the input lead of the voice coil 32, and the output lead is led out of the voice coil 32 to the conductive member 4, and then input into the external circuit.

[0094] Optionally, the two leads 321 may be respectively arranged on the two long axis sides 322 or the two short axis sides 323 of the voice coil 32. Figure 3 As shown, there are two leads 321 , and each lead 321 is disposed corresponding to a long axis side 322 .

[0095] In this embodiment, if Figure 3 、 Figure 8 and Figure 10 As shown, the vertical wall 14 is bent and extended corresponding to each long axis edge 322 to form a support arm 12, and the flat wall 13, the vertical wall 14, the back cover 5 and the vertical portion 222 are enclosed to form a wiring cavity 17 corresponding to each long axis edge 322; wherein, each lead 321 is led out from the magnetic gap 21 into a wiring cavity 17 and supported by a support arm 12.

[0096] As can be understood, the lead wire 321 is located at one end of the long axis 322 of the voice coil 32, and the vertical wall 14 is bent and extended at the other end corresponding to the long axis 322 to form the support arm 12. In this embodiment, the number of support arms 12 and the number of wiring cavities 17 are the same as the number of lead wires 321.

[0097] It should be noted that when the lead wires 321 are arranged on the two long axis sides 322 of the voice coil 32, the support arm 12 and the wiring cavity 17 are arranged corresponding to the long axis sides 322 of the voice coil 32. When the lead wires 321 are arranged on the two short axis sides 323 of the voice coil 32, the support arm 12 and the wiring cavity 17 are arranged corresponding to the short axis sides 323 of the voice coil 32, which is not limited here.

[0098] In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 22 and a central magnetic circuit portion 23, wherein the magnetic yoke 22 includes a bottom 221 and a vertical portion 222 arranged on the periphery of the bottom 221, the vertical portion 222 and the bottom 221 enclose a receiving groove 223, and the central magnetic circuit portion 23 is arranged in the receiving groove 223 and is spaced from the vertical portion 222 to form a magnetic gap 21.

[0099] In this embodiment, if Figures 2 to 5 、 Figures 7 to 9 As shown, the magnetic yoke 22 can be a magnetic plate or a magnetic yoke, etc., without limitation. The magnetic yoke 22 is used to support and secure the central magnetic circuit portion 23. The magnetic circuit system 2 is fixedly connected to the housing 1 via the magnetic yoke 22. Optionally, the magnetic yoke 22 is bonded to the central magnetic circuit portion 23, and the magnetic yoke 22 is bonded to the housing 1.

[0100] It can be understood that by setting the magnetic yoke 22 as a bottom 221 and a vertical portion 222, the vertical portion 222 is arranged on the periphery of the bottom 221, so that the vertical portion 222 and the bottom 221 are surrounded to form a accommodating groove 223. In this way, the accommodating groove 223 can be used to install and fix the central magnetic circuit part 23 while separating the central magnetic circuit part 23 from the vertical portion 222 to form a magnetic gap 21.

[0101] Optionally, the central magnetic circuit portion 23 includes a stacked central magnet 231 and a central washer 232, wherein the central magnet 231 is disposed between the central washer 232 and the bottom 221 of the magnetic yoke 22. The central magnet 231 and the central washer 232 are spaced from the vertical portion 222 to form a magnetic gap 21.

[0102] It is understandable that the center washer 232 can be a magnetic plate structure. The center magnet 231 and the center washer 232 have the same structural profile. The center magnet 231 and the center washer 232 can be a plate structure or a ring structure, which is not limited here.

[0103] In this embodiment, the vertical portion 222 may be an annular structure, wherein the annular vertical portion 222 surrounds the central magnetic circuit portion 23 and is spaced apart from the central magnetic circuit portion 23 to form an annular magnetic gap 21. Alternatively, the vertical portion 222 may be annular, or in a polygonal shape such as a quadrilateral, pentagon, or hexagon.

[0104] In one embodiment, if Figure 3and Figure 8 As shown, the vertical portion 222 includes multiple vertical portions 222, which are spaced apart along the periphery of the bottom 221. Two adjacent vertical portions 222 form a connecting gap 224, and the wiring cavity 17 is connected to the magnetic gap 21 through the connecting gap 224.

[0105] As will be appreciated, the lead wire 321 is connected at the junction of the long axis 322 and the short axis 323 of the voice coil 32. The provision of the communication gap 224 facilitates the lead wire 321 to pass through the communication gap 224 from the magnetic gap 21 and out of the wiring cavity 17. In this embodiment, the vertical portion 222 has a long side opposite the long axis 322 and a short side opposite the short axis 323. The communication gap 224 is formed adjacent to the long and short sides of the vertical portion 222.

[0106] In one embodiment, if Figure 2 、 Figure 3 、 Figure 5 and Figure 8 As shown, the magnetic yoke 22 further includes a positioning portion 225. The positioning portion 225 is formed by bending and extending the side of the vertical portion 222 corresponding to the short axis side 323 toward and away from the accommodating groove 223. The positioning portion 225 abuts against the vertical wall 14 for positioning. It can be understood that by providing the positioning portion 225 on the magnetic yoke 22, the magnetic yoke 22 is connected and fixed to the vertical wall 14 of the housing 1 through the positioning portion 225.

[0107] Optionally, the positioning portion 225 abuts against the vertical wall 14 and is fixed together by gluing or welding. In this embodiment, the bottom 221, vertical portion 222 and positioning portion 225 of the magnetic yoke 22 are an integrally formed structure, that is, formed by stamping or continuous bending process.

[0108] In one embodiment, if Figures 1 to 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, the vertical wall 14 is further provided with a positioning notch 141 corresponding to the short axis side 323, and the positioning portion 225 is provided with a positioning protrusion 226 corresponding to the positioning notch 141. The positioning protrusion 226 is accommodated and constrained within the positioning notch 141. It can be understood that such a configuration can achieve the positioning and installation of the magnetic circuit system 2 and the housing 1 through the cooperation of the positioning protrusion 226 and the positioning notch 141, ensuring that the wiring cavity 17 formed by the cooperation of the vertical portion 222 of the magnetic circuit system 2 and the vertical wall 14 of the housing 1 is symmetrically arranged, thereby ensuring the performance of the sound-generating device 100.

[0109] In one embodiment, if Figure 3 、 Figure 5 and Figure 10As shown, the side of the straight wall 13 corresponding to the minor axis 323 bends and extends toward the interior of the cavity 11 to form a positioning platform 15, which abuts and positions the positioning portion 225. As will be appreciated, this arrangement allows the positioning platform 15 to support and secure the positioning portion 225 while also ensuring the positioning effectiveness of the positioning platform 15. Optionally, the protrusion thickness or bend length of the positioning platform 15 is consistent with the protrusion thickness or bend length of the positioning protrusion 226.

[0110] In one embodiment, if Figure 3 、 Figure 4 and Figure 10 As described, the side of the straight wall 13 corresponding to the long axis edge 322 is bent and extended toward the wiring cavity 17 to form a limiting wall 16. The limiting wall 16 is spaced apart and opposite to the vertical wall 14, and is staggered with the support arm 12. The limiting wall 16, the straight wall 13 and the vertical wall 14 are combined to form a limiting groove 18. The lead 321 is led out from the magnetic gap 21 into the limiting groove 18 and is supported on the support arm 12.

[0111] It can be understood that the provision of the limiting wall 16 can effectively limit the lead 321 from the magnetic gap 21 through the connecting notch 224 into the wiring cavity 17. Optionally, the limiting wall 16 is formed by bending and extending the side of the straight wall 13 corresponding to the long axis 322 toward the wiring cavity 17, so that the limiting wall 16 is spaced apart from and opposite to the vertical wall 14, so that the limiting wall 16, the straight wall 13 and the vertical wall 14 enclose a limiting groove. In this way, when the lead 321 is introduced from the magnetic gap 21 through the connecting notch 224 into the wiring cavity 17, it is limited in the limiting groove and is led out to the inclined portion 122 of the support arm 12 through the limiting groove.

[0112] Optionally, the limiting wall 16 and the support arm 12 are staggered, that is, the projection of the limiting wall 16 onto the vertical wall 14 does not overlap with the projection of the support arm 12 onto the vertical wall 14 .

[0113] In one embodiment, if Figures 2 to 9 、 Figure 11 and Figure 12 As shown, the rear cover 5 includes a bottom wall 52 and side walls 53 arranged at an angle. The side walls 53 are connected to the housing 1. The bottom wall 52 encloses a mounting opening 51 and is connected to the magnetic circuit system 2. It can be understood that by configuring the rear cover 5 with the bottom wall 52 and side walls 53 arranged at an angle, the side walls 53 are connected to the vertical wall 14 of the housing 1 to improve the connection stability.

[0114] Optionally, the side walls 53 and the vertical wall 14 may be connected by bonding or welding. The side walls 53 may be connected to the inside or outside of the vertical wall 14, without limitation. In this embodiment, the bottom wall 52 is used to cover or conceal the opening of the wiring cavity 17 to conceal the lead wires 321. This not only improves the aesthetics, but also allows the rear cover 5 to regulate the airflow within the vibration space, thereby adjusting the acoustic performance of the sound-generating device 100.

[0115] It should be noted that the back cover 5 can be made of metal. Optionally, the bottom wall 52 and the side wall 53 of the back cover 5 are an integrally formed structure, that is, formed by stamping or continuous bending process.

[0116] In one embodiment, if Figures 2 to 5 、 Figure 11 As shown, the rear cover 5 is a U-shaped frame, enclosing a mounting opening 51 and an opening 56 communicating with the mounting opening 51. It will be appreciated that the U-shaped rear cover 5 encloses the mounting opening 51 for mounting the magnetic circuit system 2 and forms an opening 56 communicating with the mounting opening 51. The opening 56 is used to expose the conductive member 4 to ensure connection between the external circuit and the conductive member 4. Optionally, the opening 56 formed in the rear cover 5 is provided corresponding to the conductive member 4.

[0117] In this embodiment, the bottom wall 52 and the side walls 53 of the rear cover 5 both present a U-shaped frame structure, and the side walls 53 cooperate with the bottom wall 52 to form an L-shaped structure.

[0118] In order to further improve the installation stability of the rear cover 5 and the installation stability of the magnetic circuit system 2. In one embodiment, Figures 2 to 5 and Figure 11 As shown, the side of the bottom wall 52 adjacent to the magnetic circuit system 2 bends and extends toward the wiring cavity 17 to form a connecting arm 54, which is connected to the magnetic circuit system 2. It can be understood that the connecting arm 54 is connected and fixed to the vertical portion 222 of the magnetic circuit system 2 to increase the contact area, thereby improving the connection stability.

[0119] Optionally, the connecting arm 54 of the rear cover 5 and the vertical portion 222 of the magnetic circuit system 2 can be connected by bonding or welding. It should be noted that the bottom wall 52, side walls 53, and connecting arm 54 of the rear cover 5 are integrally formed, that is, formed by stamping or continuous bending. In this embodiment, the connecting arm 54 is spaced apart from the side walls 53 and is located on the same side of the bottom wall 52, so that the side walls 53, bottom wall 52, and connecting arm 54 enclose a U-shaped groove structure.

[0120] In another embodiment, if Figures 6 to 9 、 Figure 12As shown, the rear cover 5 is a square frame and is further provided with a communication port 57 that communicates with the wiring cavity 17. It will be appreciated that the square frame of the rear cover 5 encloses a mounting opening 51 for mounting the magnetic circuit system 2. By providing the communication port 57 that communicates with the wiring cavity 17 on the rear cover 5, the communication port 57 is provided corresponding to the conductive member 4, thereby exposing the conductive member 4 through the communication port 57 to ensure connection between the external circuit and the conductive member 4. Optionally, the communication port 57 formed on the rear cover 5 is provided corresponding to the conductive member 4.

[0121] In this embodiment, the bottom wall 52 and the side walls 53 of the rear cover 5 are both square frame structures, and the side walls 53 cooperate with the bottom wall 52 to form an L-shaped structure, so that the center of the bottom wall 52 is hollowed out to form a mounting opening 51.

[0122] In order to further improve the installation stability of the rear cover 5 and the installation stability of the magnetic circuit system 2. In one embodiment, Figures 7 to 9 and Figure 12 As shown, a limit platform 227 is provided on the side of the magnetic circuit system 2 facing away from the diaphragm 31, and an end of the bottom wall 52 away from the side wall 53 is limited to the limit platform 227. It can be understood that by providing a protrusion on the side of the bottom 221 of the magnetic circuit system 2 facing away from the central magnetic circuit portion 23, the protrusion and the edge of the bottom 221 form a limit platform 227 structure. In this way, the protrusion of the bottom 221 can be used to cooperate with the installation opening 51 for positioning, and the bottom wall 52 can be used to support and connect to the limit platform 227, thereby improving the connection stability between the back cover 5 and the magnetic circuit system 2.

[0123] In one embodiment, if Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 、 Figure 11 and Figure 12 As shown, the bottom wall 52 is provided with an air flow hole 55 connected to the wiring cavity 17. It can be understood that by providing the air flow hole 55 on the back cover 5, the air flow hole 55 is connected to the wiring cavity 17, so that the air flow hole 55 is used to regulate and control the air flow in the vibration space of the sound-generating device 100 to ensure the acoustic performance of the sound-generating device 100.

[0124] As can be understood, the bottom wall 52 of the rear cover 5 is provided with air holes 55 at the corners corresponding to the communicating notches 224. There are multiple air holes 55, which are spaced apart on the bottom wall 52 of the rear cover 5. Of course, the multiple air holes 55 can also be spaced apart along the extending direction of the bottom wall 52, which is not limited here.

[0125] In one embodiment, the magnetic yoke 22 is provided with an air hole, and the sound-generating device 100 further includes a metal mesh. The metal mesh is provided on a side of the magnetic yoke 22 facing away from the housing 1 and covers the air hole.

[0126] In this embodiment, the diaphragm 31, the shell 1 and the magnetic circuit system 2 enclose a vibration space. In order to balance the pressure inside and outside the vibration space of the sound-generating device 100, an air vent is provided on the magnetic yoke 22 so that the air vent is connected to the external atmosphere. In this way, when the voice coil 32 drives the diaphragm 31 to vibrate, the atmospheric pressure inside and outside the vibration space can be balanced through the air vent to ensure the acoustic performance of the sound-generating device 100.

[0127] As will be appreciated, by providing a metal mesh with a magnetic yoke 22 on the side facing away from the housing 1 and covering the ventilation holes, when the sound-generating device 100 is installed in an electronic device, it can be filled with sound-absorbing material to further enhance the sound quality and acoustic performance. The metal mesh effectively prevents the sound-absorbing material from entering the interior of the sound-generating device 100 through the ventilation holes and affecting the sound quality of the sound-generating device 100.

[0128] In one embodiment, the vibration system 3 further includes a centering support plate, which includes an outer fixing portion, an inner fixing portion, and an elastic portion connected between the outer fixing portion and the inner fixing portion. The outer fixing portion is connected to the shell 1, and the inner fixing portion is connected to the voice coil 32.

[0129] In this embodiment, a centering support is provided so that the outer fixing portion of the centering support is connected to the shell 1, and the inner fixing portion of the centering support is connected to the voice coil 32, so that the centering support is used to balance and stabilize the vibration of the diaphragm 31 driven by the voice coil 32, thereby preventing the voice coil 32 from causing the diaphragm 31 to swing or polarize.

[0130] In this embodiment, the centering support is optionally made of PI material. This allows the support to be made thinner, saving material and installation space, thereby effectively increasing the volume of the magnetic circuit system 2 and improving the product's BL value. Optionally, the centering support can be a single-layer structure. Of course, in other embodiments, the centering support can also be a multi-layered composite structure, which is not limited here. Optionally, the thickness of the centering support is greater than or equal to 0.0125 mm.

[0131] In order to further increase the elongation of the centering support plate, in one embodiment, the elastic portion includes two elastic arms and a bending portion connecting the two elastic arms. The bending portion and the two elastic arms enclose an elastic space 336, and the ends of the two elastic arms away from the bending portion are respectively connected to the external fixing portion and the internal fixing portion.

[0132] As can be understood, this arrangement effectively increases the length of the elastic arm, improving the elasticity and elastic deformation performance of the centering support. It should be noted that when the centering support is in a stationary state, the elastic arm of the centering support can be made very short, thereby providing more space for increasing the size of the magnets in magnetic circuit system 2 and improving product performance.

[0133] Optionally, the centering support can be composed of one or more layers of material. When using a single layer, the hardness and thickness of the material can be selected to match the length of the elastic portion. In contrast, when using multiple layers, each layer can be made of a material with a lower elastic modulus. This flexible design facilitates the selection of a lightweight design, which improves product performance.

[0134] In one embodiment, the centering support includes a plurality of support plates, and the magnetic circuit system 2 is provided with a plurality of communication gaps 224 connected to the magnetic gap 21 , and each centering support plate is provided corresponding to a communication gap 224 .

[0135] In this embodiment, the centering support includes an outer fixing portion, an inner fixing portion, and an elastic portion connected between the outer fixing portion and the inner fixing portion. The outer fixing portion is connected to the housing 1 , and the inner fixing portion is connected to the side of the voice coil 32 facing away from the diaphragm 31 .

[0136] It can be understood that the centering support plate can be a large integral structure, the outer fixing part can be optionally an annular structure and connected to the shell 1, the inner fixing part is connected to the end of the voice coil 32 facing away from the diaphragm 31, and the inner fixing part is connected to the outer fixing part through the elastic part. In this way, when the voice coil 32 vibrates, the inner fixing part drives the elastic part to deform, so as to avoid the voice coil 32 driving the diaphragm 31 to swing or polarize.

[0137] Of course, in other embodiments, the centering dampers may be multiple small components, for example, including two or four dampers. When there are two dampers, the dampers are symmetrically arranged and connected to the two minor axes or two major axes of housing 1, without limitation. When there are four dampers, the dampers are disposed at the four corners of housing 1 to ensure symmetry and thus balanced vibration of voice coil 32 of sound-generating device 100. Optionally, there are four dampers, each corresponding to the four connecting openings 224 of magnetic circuit system 2.

[0138] The present invention further provides an electronic device comprising a device housing 1 and the aforementioned sound-generating device 100, with the sound-generating device 100 disposed within the device housing 1. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all of the technical solutions of all of the aforementioned embodiments, it at least possesses all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon herein.

[0139] 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, wherein the housing is a metal part and has a cavity; a rear cover connected to one end of the housing, the rear cover being formed with a mounting opening communicating with the cavity; a magnetic circuit system, the magnetic circuit system being disposed at the mounting opening and connected to the housing and the rear cover, the magnetic circuit system being provided with a magnetic gap, the magnetic circuit system, the rear cover, and the housing enclosing a wiring cavity located outside the magnetic gap; and a vibration system comprising a diaphragm and a voice coil, the diaphragm being connected to an end of the housing facing away from the rear cover and being opposite and spaced from the magnetic circuit system; one end of the voice coil being connected to the diaphragm and the other end being suspended within the magnetic gap; the voice coil having a lead extending from the magnetic gap into the wiring cavity; In which, the shell is also provided with a support arm, which is located in the routing cavity, and the lead is led out from the magnetic gap to the routing cavity and supported by the support arm. The shell includes a flat wall and a vertical wall arranged at an angle, and the flat wall and the vertical wall enclose a cavity. The back cover is connected to one end of the vertical wall away from the flat wall. The support arm is formed by the vertical wall bending and extending toward the cavity, and is located between the flat wall and the back cover; the magnetic circuit system has a vertical portion separated from the vertical wall, and the flat wall, the vertical wall, the back cover and the vertical portion cooperate to form the routing cavity.

2. The sound-generating device according to claim 1, characterized in that: The support arm includes a platform portion and an inclined portion connected to each other, the platform portion is connected to the vertical wall, and the inclined portion extends obliquely from the platform portion toward the wiring cavity; The sound-generating device further includes a conductive member, which is disposed on the platform portion. The lead wire is guided to the platform portion via the inclined portion and is connected to the conductive member.

3. The sound-generating device according to claim 2, characterized in that: The distance between the inclined portion and the straight wall gradually decreases from an end adjacent to the platform portion to an end away from the platform portion; And / or, one end of the lead wire adjacent to the conductive member is connected to the inclined portion via an adhesive layer, and the adhesive layer is a damping adhesive; And / or, the conductive member is an FPCB.

4. The sound-generating device according to claim 1, wherein: The voice coil has a long axis side and a short axis side connected end to end; The lead wires include two, and each lead wire is arranged corresponding to one of the long axis sides; The vertical wall is bent and extended corresponding to each of the long axis edges to form a support arm, and the flat wall, the vertical wall, the back cover and the vertical portion are enclosed corresponding to each of the long axis edges to form a wiring cavity; Each of the lead wires is led out from the magnetic gap into a wiring cavity and supported by a support arm.

5. The sound-generating device according to claim 4, characterized in that: The magnetic circuit system comprises: A magnetically conductive yoke, the magnetically conductive yoke comprising a bottom and the vertical portion provided on the periphery of the bottom, the vertical portion and the bottom enclosing a receiving groove; and A central magnetic circuit portion is disposed in the accommodating groove and spaced apart from the vertical portion to form the magnetic gap.

6. The sound-generating device according to claim 5, characterized in that: The vertical portions include a plurality of vertical portions, which are spaced apart along the periphery of the bottom portion. Two adjacent vertical portions form a connecting gap, and the wiring cavity is connected to the magnetic gap through the connecting gap.

7. The sound-generating device according to claim 5, characterized in that: The magnetic yoke further includes a positioning portion, which is formed by bending and extending the side of the vertical portion corresponding to the short axis side toward and away from the accommodating groove, and the positioning portion abuts against the vertical wall for limiting position.

8. The sound-generating device according to claim 7, characterized in that: The vertical wall is further provided with a positioning notch corresponding to the short axis side, and the positioning portion is provided with a positioning protrusion corresponding to the positioning notch, and the positioning protrusion is accommodated and limited in the positioning notch; And / or, a side of the straight wall corresponding to the short axis is bent and extended toward the cavity to form a positioning platform, and the positioning platform abuts against the positioning portion for positioning; And / or, the side of the straight wall corresponding to the long axis edge is bent and extended toward the wiring cavity to form a limiting wall, the limiting wall is spaced and opposite to the vertical wall, and is staggered with the support arm, the limiting wall, the straight wall and the vertical wall are combined to form a limiting groove, the lead is led out from the magnetic gap into the limiting groove, and is supported on the support arm.

9. The sound-generating device according to any one of claims 1 to 8, characterized in that: The rear cover includes a bottom wall and side walls arranged at an angle, the side walls are connected to the shell, and the bottom wall encloses the installation opening and is connected to the magnetic circuit system.

10. The sound generating device according to claim 9, characterized in that: A side of the bottom wall adjacent to the magnetic circuit system bends and extends toward the wiring cavity to form a connecting arm, and the connecting arm is connected to the magnetic circuit system; Alternatively, a limit platform is provided on a side of the magnetic circuit system facing away from the diaphragm, and an end of the bottom wall away from the side wall is limited to the limit platform.

11. The sound generating device according to claim 9, characterized in that: The bottom wall is provided with an air flow hole communicating with the wiring cavity.

12. The sound generating device according to any one of claims 1 to 8, characterized in that: The rear cover is a U-shaped frame, and the rear cover encloses the mounting port and an opening communicating with the mounting port; Alternatively, the rear cover is a square frame, and the rear cover is further provided with a communication port connected to the wiring cavity.

13. An electronic device, characterized in that: The device comprises a device housing and a sound-generating device according to any one of claims 1 to 12, wherein the sound-generating device is arranged in the device housing.

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