Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction. Two magnetic circuit assemblies of the sound production device are arranged at intervals along a first direction and form a magnetic gap therebetween. Each magnetic circuit assembly comprises a first magnetic conducting plate, a first magnet, a second magnetic conducting plate and a second magnet which are sequentially arranged along a second direction. The second magnet is connected with a magnetic yoke. One of the second magnetic conducting plate and the magnetic yoke is bent and extended to form a first welding part, and the first welding part is welded with the other one. A first stop part is arranged on a side of the first magnetic conducting plate close to the magnetic gap and abuts against a side of the first magnet facing the magnetic gap. A second stop part is arranged on a side of the second magnetic conducting plate close to the magnetic gap and abuts against a side of the second magnet facing the magnetic gap. The application aims to improve the installation stability of the magnetic circuit system in the sound production device and avoid problems such as falling off and failure of the magnetic circuit assembly of the magnetic circuit system.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained widespread acceptance and adoption. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As the performance of electronic products improves, the acoustic performance of these devices is also an inevitable trend.

[0003] In the related art, the magnetic circuit system of the sound-generating device is usually fixed by glue. When the glue fails due to external environmental factors, the adhesive force of the glue decays or disappears, causing the magnets of the magnetic circuit system to fall off and fail. 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 improve the installation stability of the magnetic circuit system in the sound-generating device and avoid problems such as the magnetic circuit components of the magnetic circuit system falling off and failing.

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

[0006] shell;

[0007] A magnetic circuit system connected to the housing, comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, wherein the two magnetic circuit components are spaced apart along a first direction and a magnetic gap is formed therebetween, and each magnetic circuit component comprises a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked in sequence along a second direction, wherein the second magnet is connected to the magnetic yoke, wherein a periphery of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, wherein the first welding portion is welded to the other, and the second direction is perpendicular to the first direction; and

[0008] a vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, wherein the periphery of the diaphragm assembly is connected to the housing, the voice coil is flat, the axial direction of the voice coil is along the first direction and the voice coil is inserted into the magnetic gap, and the voice coil drives the diaphragm assembly to vibrate along the second direction;

[0009] In which, a first stop portion is provided on the side of the first magnetic conductive plate close to the magnetic gap, and the first stop portion is in limited contact with the side of the first magnet facing the magnetic gap; and / or a second stop portion is provided on the side of the second magnetic conductive plate close to the magnetic gap, and the second stop portion is in limited contact with the side of the second magnet facing the magnetic gap.

[0010] In one embodiment, a side of the second magnetic conductive plate facing away from the voice coil is bent and extended toward the magnetic conductive yoke to form the first welding portion. The second magnet and the magnetic conductive yoke are provided with a first groove corresponding to the first welding portion. The first welding portion is received in the first groove and welded to the magnetic conductive yoke. A surface of the first welding portion facing away from the first groove does not extend beyond surfaces of the second magnet and the magnetic conductive yoke facing away from the voice coil.

[0011] Alternatively, the magnetic yoke is bent and extended toward the side of the second magnetic plate facing away from the voice coil to form the first welding portion, and the second magnet and the second magnetic plate are provided with a first groove corresponding to the first welding portion, and the first welding portion is accommodated in the first groove and is welded to the second magnetic plate, and the surface of the first welding portion facing away from the first groove does not exceed the surface of the second magnet and the second magnetic plate facing away from the voice coil.

[0012] In one embodiment, a plurality of first stoppers are provided on a side of each first magnetic conductive plate close to the magnetic gap, the plurality of first stoppers are spaced apart, and all of the first stoppers are in limited contact with the side of the first magnet facing the magnetic gap; or, the first stoppers are provided at two corners of each first magnetic conductive plate close to the magnetic gap, and both of the first stoppers are in limited contact with the side of the first magnet facing the magnetic gap.

[0013] And / or, the first stop portion is formed by bending and extending the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet; or, the first stop portion is a boss formed by recessing the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet, and the boss is formed by the first magnetic conductive plate through a stamping and half-shearing process;

[0014] And / or, a first limiting groove is provided on the side of each first magnet facing the magnetic gap corresponding to the first stop portion, the first stop portion is limited in the first limiting groove, and the surface of the first stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

[0015] In an embodiment, each of the second magnetic conductive plates is provided with a plurality of second stop portions near a side of the second magnetic conductive plate close to the magnetic gap, the plurality of second stop portions are arranged at intervals, and each of the plurality of second stop portions is in limiting abutment with a side of the second magnet facing the magnetic gap; or, each of the second magnetic conductive plates is provided with a second stop portion at each of two corner portions of the second magnetic conductive plate close to the magnetic gap, and each of the two second stop portions is in limiting abutment with the side of the second magnet facing the magnetic gap.

[0016] Furthermore, the second stop portion is formed by bending extension of a corner portion of the second magnetic conductive plate close to the magnetic gap towards the second magnet; or, the second stop portion is a boss formed by recessing a corner portion of the second magnetic conductive plate close to the magnetic gap towards the second magnet, and the boss is formed by stamping and half-cutting process of the second magnetic conductive plate.

[0017] Furthermore, each of the second magnets is provided with a second limiting groove corresponding to the second stop portion at a side of the second magnet facing the magnetic gap, and the second stop portion is limited in the second limiting groove, and a surface of the second stop portion facing the magnetic gap does not exceed a surface of the first magnet facing the magnetic gap.

[0018] In an embodiment, the shell is a metal shell, and the shell is welded to the first magnetic conductive plate.

[0019] Furthermore, the first magnet and the second magnet of each of the magnetic circuit assemblies are magnetized along the second direction and in opposite directions, and the first magnet and the second magnet opposite to each other along the first direction are magnetized in opposite directions.

[0020] In an embodiment, an inner wall of the shell is provided with a limiting portion protruding, and the limiting portion is connected to the first magnetic conductive plate.

[0021] In an embodiment, a side of the first magnetic conductive plate close to the magnetic gap is provided with a protruding portion protruding in a direction away from the first magnet along the second direction, the protruding portion and the first magnetic conductive plate form a limiting groove, the limiting portion is limited in the limiting groove, and the limiting portion is in limiting abutment with the protruding portion.

[0022] Furthermore, the limiting portion is provided with an avoiding groove corresponding to the folded ring portion of the diaphragm assembly.

[0023] In an embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate connected to the diaphragm, and the vibrating plate is connected to the voice coil.

[0024] The shell includes a ring-shaped support and a bottom shell connected to each other, a periphery of the diaphragm is combined to an inner peripheral wall of the ring-shaped support, the diaphragm and the ring-shaped support are integrally formed by hot-pressing or injection molding, and the bottom shell is connected to the magnetic circuit system.

[0025] In one embodiment, the bottom shell includes an annular body and a side wall connected to the annular body, the first magnetic conductive plate is connected to the annular body on a side facing away from the magnetic conductive yoke, and the side wall is welded to the magnetic conductive yoke;

[0026] And / or, the bottom shell includes an annular body and a side wall connected to the annular body, the first magnetic conductive plate is connected to the annular body on a side facing away from the magnetic conductive yoke, the side wall has a receiving hole, and the magnetic circuit assembly extends into the receiving hole;

[0027] And / or, the bottom shell is a metal shell, and the bottom shell is welded to the first magnetic conductive plate;

[0028] And / or, the vibration plate is provided with a reinforcing rib extending concavely toward a side close to the voice coil.

[0029] In one embodiment, the vibration system further includes a frame, wherein the frame includes two frames and is respectively provided at two ends of the voice coil along the third direction, and the frames connect the voice coil and the vibration plate;

[0030] The third direction is perpendicular to the first direction and the second direction respectively.

[0031] In one embodiment, the vibration system further includes two centering supports, which are distributed at both ends of the voice coil corresponding to the skeleton.

[0032] Each of the skeletons includes a first connecting portion and a second connecting portion and a third connecting portion respectively arranged at both ends of the first connecting portion and bent toward both sides of the first connecting portion. The two first connecting portions are located at both ends of the voice coil along the third direction and are respectively connected to two side surfaces opposite to the voice coil. The two second connecting portions are respectively connected to the vibration plate, and the two third connecting portions are respectively connected to the two centering supports.

[0033] In one embodiment, each of the centering supports includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion, each of the inner fixing portions is connected to one of the third connecting portions and is provided with an inner solder pad electrically connected to a lead of the voice coil;

[0034] The housing is provided with a relief opening corresponding to each of the external fixing parts, each of the external fixing parts is passed through the relief opening and provided with an external soldering pad, and the magnetic yoke is bent and extended toward the external fixing part corresponding to each of the relief openings to form a positioning protrusion.

[0035] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device.

[0036] The sound generating device of the technical scheme of the present application connects the magnetic circuit system and the vibration system to the shell, thereby achieving the installation and fixation of the magnetic circuit system and the vibration system, and sets the magnetic circuit system as a magnetic yoke and two magnetic circuit components on one side of the magnetic yoke, so that the two magnetic circuit components are arranged at intervals along a first direction and form a magnetic gap therebetween, and sets the vibration system as a diaphragm component and a voice coil connected to the diaphragm component, so that the voice coil is located in the magnetic gap of the magnetic circuit system. When the voice coil is energized, it can vibrate in the magnetic gap under the drive of the magnetic circuit system, thereby driving the diaphragm component to vibrate and generate sound. In this way, the sound generating device has a sound generating function. At the same time, the voice coil is set to be flat, so that the axial direction of the voice coil is along the first direction and is inserted into the magnetic gap. Compared with the sound generating device with a ring-shaped voice coil cooperating with a ring-shaped magnetic gap, the structure of the sound generating device of the present application is more compact and occupies less assembly space. Further, each magnetic circuit component is set as a first magnetic plate, a first magnet, a second magnetic plate and a second magnet arranged in sequence along a second direction. The second magnet is connected to the magnetic yoke, and one of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, so that the first welding portion is welded to the other one, thereby further connecting the magnetic yoke and the magnetic circuit component of the magnetic circuit system as a whole through the first welding portion, improving the connection stability. In this way, the attractive force between the magnetic circuit components of the magnetic circuit system can be offset by the first welding portion, and the problem of the magnetic circuit components of the magnetic circuit system falling off and failing when the adhesive bonding force of the magnetic circuit system decays or disappears can be prevented. At the same time, a first stop portion is provided on one side of the first magnetic plate close to the magnetic gap, and the first stop portion is limited to abut against the first magnet. Alternatively, a second stop portion is provided on one side of the second magnetic plate close to the magnetic gap, and the second stop portion is limited to abut against the second magnet. In this way, the two first magnets and / or the two second magnets can be prevented from being attracted to each other and approaching, and the product defects caused by the attraction of the two first magnets and / or the two second magnets can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0038] Figure 1 Structure schematic diagram of an embodiment of the sound generating device provided by the present application;

[0039] Figure 2 Structure schematic diagram of another view of an embodiment of the sound generating device provided by the present application;

[0040] Figure 3A partially exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0041] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0042] Figure 5 A structural schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0043] Figure 6 A cross-sectional schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0044] Figure 7 An exploded schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0045] Figure 8 An exploded schematic diagram of an embodiment of a magnetic circuit assembly provided by the present invention;

[0046] Figure 9 A cross-sectional schematic diagram of the connection between the diaphragm assembly and the annular support in one embodiment of the sound-generating device provided by the present invention;

[0047] Figure 10 This is a schematic structural diagram of the connection between the voice coil, the frame and the centering support in one embodiment of the sound-generating device provided by the present invention.

[0048] Description of Figure Numbers:

[0049] 100. Sound-generating device; 1. Housing; 11. Annular bracket; 12. Bottom shell; 121. Annular body; 1211. Limiting portion; 1212. Avoidance groove; 122. Sidewall; 1221. Accommodating hole; 1222. Avoidance port; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Positioning protrusion; 22. Magnetic circuit assembly; 221. First magnetic plate; 2211. Protrusion; 2212. Limiting groove; 2213. First stopper; 222. First magnet; 2221. First limiting groove; 223. Second magnetic plate ;2231, first welding part;2232, second stop part;224, second magnet;2241, second limiting groove;23, magnetic gap;24, first groove;3, vibration system;31, diaphragm assembly;311, diaphragm;312, vibration plate;3121, reinforcing rib;32, voice coil;33, skeleton;331, first connecting part;332, second connecting part;333, third connecting part;34, centering support plate;341, external fixing part;3411, external welding pad;342, internal fixing part;343, elastic arm.

[0050] 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

[0051] 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.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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.

[0053] 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.

[0054] 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.

[0055] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained widespread acceptance and adoption. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As the performance of electronic products improves, the acoustic performance of these devices is also an inevitable trend.

[0056] In the related art, the magnetic circuit system of the sound-generating device is usually fixed by glue. The glue can be preserved for a long time in a physical environment at room temperature without the bonding force decaying. However, in some high-temperature, high-humidity or acidic and alkaline environments, the bonding force of the glue will decay rapidly, resulting in bonding failure. When the glue fails due to external environmental factors, the bonding force of the glue decays or disappears, causing the magnets of the magnetic circuit system to fall off and fail. At the same time, the magnetic circuit system provides driving force for the vibration of the voice coil, and there is a static magnetic force of attraction or repulsion between the magnets of the magnetic circuit system, which accelerates the shedding and failure of the magnets due to the existence of static magnetic force.

[0057] Based on the above concepts and problems, the present invention proposes a sound-generating device 100, which is applied to an electronic device. It is understood that the electronic device can be a mobile phone, headphones, smart wearable devices, smart glasses, etc., which are not limited here.

[0058] In this embodiment, the sound-generating device 100 provides a first welding portion 2231 on the second magnetic plate 223 or the magnetic yoke 21 of the magnetic circuit assembly 22 of the magnetic circuit system 2, so that the first welding portion 2231 is welded to the magnetic yoke 21 or the second magnetic plate 223. In this way, even if the glue of the magnetic circuit system 2 fails, it will not fall off due to the welding and fixation restriction of the first welding portion 2231; at the same time, a first stop portion 2213 is provided on the side of the first magnetic plate 221 close to the magnetic gap 23, and the first stop portion 2213 is used to limit and abut against the first magnet 222, and / or a second stop portion 2232 is provided on the side of the second magnetic plate 223 close to the magnetic gap 23, and the second stop portion 2232 is used to limit and abut against the second magnet 224. In this way, the two first magnets 222 or the two second magnets 224 can be prevented from attracting each other and approaching each other, thereby avoiding product defects caused by the two first magnets 222 or the two second magnets 224 being attracted to each other.

[0059] Please refer to Figures 1 to 10 As shown, in an embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3. The magnetic circuit system 2 is connected to the housing 1. The magnetic circuit system 2 includes a magnetic yoke 21 and two magnetic circuit components 22 provided on one side of the magnetic yoke 21. The two magnetic circuit components 22 are arranged at intervals along the first direction and a magnetic gap 23 is formed between them. Each magnetic circuit component 22 includes a first magnetic plate 221, a first magnet 222, a second magnetic plate 223 and a second magnet 224 stacked in sequence along the second direction. The second magnet 224 is connected to the magnetic yoke 21. The periphery of one of the second magnetic plate 223 and the magnetic yoke 21 is bent and extended to form a first welding portion 2231. The first welding portion 2231 is welded to the other, and the second The direction is perpendicular to the first direction, the vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31, the periphery of the diaphragm assembly 31 is connected to the shell 1, the voice coil 32 is formed into a flat shape, the axial direction of the voice coil 32 is along the first direction and inserted in the magnetic gap 23, and the voice coil 32 drives the diaphragm assembly 31 to vibrate along the second direction; wherein, the first magnetic conductive plate 221 is provided with a first stop portion 2213 on the side close to the magnetic gap 23, and the first stop portion 2213 is limitedly abutted with the side of the first magnet 222 facing the magnetic gap 23; and / or, the second magnetic conductive plate 223 is provided with a second stop portion 2232 on the side close to the magnetic gap 23, and the second stop portion 2232 is limitedly abutted with the side of the second magnet 224 facing the magnetic gap 23.

[0060] In this embodiment, the sound-generating device 100 may be a speaker unit, and the sound-generating device 100 may be applied to electronic devices, such as computers, mobile phones, smart wearable devices, etc. This embodiment is described by taking the sound-generating device 100 as a speaker unit as an example.

[0061] Understandably, Figures 1 to 3 As shown, the sound-generating device 100 has a long and narrow shape. It should be noted that the sound-generating device 100 has a long axis, a short axis, and a height (thickness) along the vibration direction. The short axis of the sound-generating device 100 is defined as the first direction, the vibration direction of the sound-generating device 100 (i.e., the height (thickness) direction of the sound-generating device 100) is defined as the second direction, and the long axis of the sound-generating device 100 is defined as the third direction. The vibration direction, short axis, and long axis directions are mutually perpendicular, meaning that the first, second, and third directions are perpendicular to each other.

[0062] In this embodiment, the ratio of the length to the width of the sound-generating device 100 is greater than 2:1, allowing it to better fit within the reserved space of a microelectronic device, such as a smart wearable device (e.g., a smartwatch). As will be appreciated, the voice coil 32 of the vibration system 3 is flat, with its axial direction along a first direction and inserted within the magnetic gap 23. This allows the voice coil 32 to drive the diaphragm assembly 31 to vibrate in a second direction, thereby vibrating the vibration system 3 in the second direction. By configuring the voice coil 32 in a flat shape, the voice coil 32 of the present invention, when used in the sound-generating device 100, makes the structure of the sound-generating device 100 more compact and occupies less assembly space, compared to sound-generating devices with an annular voice coil and an annular magnetic gap.

[0063] Understandably, Figures 3 to 8 As shown, the two magnetic circuit assemblies 22 of the magnetic circuit system 2 are arranged at intervals along a first direction on one side of the magnetic yoke 21, forming a magnetic gap 23 between the two magnetic circuit assemblies 22. The voice coil 32 is inserted into the magnetic gap 23 on the side away from the diaphragm assembly 31. In this way, when powered, the voice coil 32 can vibrate under the drive of the magnetic circuit system 2, thereby driving the diaphragm assembly 31 connected to the voice coil 32 to vibrate and produce sound, thus enabling the sound-generating device 100 to have a sound-generating function. At the same time, by configuring the voice coil 32 in a flat shape, the structure of the sound-generating device 100 of the present invention is more compact than a sound-generating device with an annular voice coil and an annular magnetic gap, occupying less assembly space.

[0064] In this embodiment, if Figures 1 to 8As shown, by setting each magnetic circuit component 22 to have a first magnetic conductive plate 221, a first magnet 222, a second magnetic conductive plate 223 and a second magnet 224 stacked in sequence along the second direction, the second magnet 224 of each magnetic circuit component 22 is connected to one side of the magnetic yoke 21, the second magnetic conductive plate 223 is clamped between the first magnet 222 and the second magnet 224, and the first magnet 222 is clamped between the first magnetic conductive plate 221 and the second magnetic conductive plate 223, so that the first magnetic conductive plate 221, the first magnet 222, the second magnetic conductive plate 223 and the second magnet 224 of the two magnetic circuit components 22 correspond one to one along the first direction and are spaced to form a magnetic gap 23.

[0065] Alternatively, as Figure 6 As shown, the first magnet 222 and the second magnet 224 of each magnetic circuit assembly 22 are magnetized along the second direction and in opposite directions. The magnetization directions of the two first magnets 222 and the two second magnets 224 facing each other along the first direction are opposite.

[0066] It can be understood that a first magnetic gap is formed between the two first magnetic conductive plates 221, and the long side of the voice coil 32 close to the diaphragm assembly 31 is located in the first magnetic gap. A second magnetic gap is formed between the two second magnetic conductive plates 223, and the long side of the voice coil 32 away from the diaphragm assembly 31 is located in the second magnetic gap. The utilization rate of the magnetic circuit system 2 is higher, and the voice coil 32 can obtain greater driving force.

[0067] In this embodiment, a first welding portion 2231 is formed by bending and extending the periphery of the second magnetic plate 223 toward the magnetic yoke 21, so that the first welding portion 2231 is welded to the magnetic yoke 21, or a first welding portion 2231 is formed by bending and extending the magnetic yoke 21 toward the second magnetic plate 223, so that the first welding portion 2231 is welded to the second magnetic plate 223. In this way, the first welding portion 2231 is used to further strengthen the connection strength between the magnetic yoke 21 and the magnetic circuit component 22 of the magnetic circuit system 2, so that the magnetic circuit system 2 is further connected as a whole through the first welding portion 2231, thereby improving the structural stability of the magnetic circuit system 2. In this way, the first welding portion 2231 can be used to offset the suction force between the magnetic circuit components 22 of the magnetic circuit system 2, and can also prevent the magnetic circuit components 22 of the magnetic circuit system 2 from falling off and failing when the adhesive force of the glue of the magnetic circuit system 2 declines or disappears.

[0068] At the same time, a first stop portion 2213 is further provided on the side of the first magnetic conductive plate 221 close to the magnetic gap 23, and the first stop portion 2213 is used to limit and abut against the first magnet 222, and / or a second stop portion 2232 is provided on the side of the second magnetic conductive plate 223 close to the magnetic gap 23, and the second stop portion 2232 is used to limit and abut against the second magnet 224. In this way, the two first magnets 222 and / or the two second magnets 224 are prevented from attracting each other and approaching each other, further offsetting the static magnetic force, avoiding product defects caused by the attraction of the two first magnets 222 and / or the two second magnets 224, and at the same time, when the adhesive force of the glue of the magnetic circuit system 2 declines or disappears, the magnetic circuit component 22 of the magnetic circuit system 2 is prevented from falling off and failing.

[0069] Optionally, multiple first welding portions 2231 are provided, with at least one first welding portion 2231 provided around the periphery of each second magnetic conductive plate 223. Each of the multiple first welding portions 2231 is welded to the magnetic conductive yoke 21, though this is not limited herein. This can further enhance the structural stability of the magnetic circuit system 2. It will be appreciated that multiple first welding portions 2231 are provided around the periphery of each second magnetic conductive plate 223, with the multiple first welding portions 2231 spaced apart along the third direction.

[0070] Of course, in other embodiments, the magnetic yoke 21 may be provided with at least one first welding portion 2231 corresponding to each second magnetic conductive plate 223, and the first welding portion 2231 may be welded to the second magnetic conductive plate 223. This is not limited herein. This further enhances the structural stability of the magnetic circuit system 2. It is understood that the magnetic yoke 21 may be provided with multiple first welding portions 2231 corresponding to each second magnetic conductive plate 223, and the multiple first welding portions 2231 may be arranged at intervals along the third direction.

[0071] The sound-generating device 100 of the present invention connects the magnetic circuit system 2 and the vibration system 3 to the housing 1, thereby achieving the installation and fixation of the magnetic circuit system 2 and the vibration system 3, and sets the magnetic circuit system 2 as a magnetic yoke 21 and two magnetic circuit components 22 arranged on one side of the magnetic yoke 21, so that the two magnetic circuit components 22 are arranged at intervals along the first direction and form a magnetic gap 23 therebetween, and sets the vibration system 3 as a diaphragm component 31 and a voice coil 32 connected to the diaphragm component 31, so that the voice coil 32 is located in the magnetic gap 23 of the magnetic circuit system 2, so that when power is turned on, the voice coil 32 can be driven by the magnetic circuit system 2 to rotate in the magnetic gap 23. The diaphragm assembly 31 vibrates in the magnetic gap 23, thereby driving the diaphragm assembly 31 to vibrate and produce sound, so that the sound-producing device 100 has a sound-producing function; at the same time, by setting the voice coil 32 to a flat shape, the axial direction of the voice coil 32 is along the first direction and inserted into the magnetic gap 23, so that compared with the sound-producing device with an annular voice coil and an annular magnetic gap, the structure of the sound-producing device 100 of the present invention is more compact and occupies less assembly space; further, by setting each magnetic circuit assembly 22 to be a first magnetic conductive plate 221, a first magnet 222, a second magnetic conductive plate 223 and a second magnet 22 stacked in sequence along the second direction 4. The second magnet 224 is connected to the magnetic yoke 21, and one of the second magnetic plate 223 and the magnetic yoke 21 is bent and extended to form a first welding portion 2231, so that the first welding portion 2231 is welded to the other, thereby further connecting the magnetic yoke 21 and the magnetic circuit component 22 of the magnetic circuit system 2 into a whole by using the first welding portion 2231, thereby improving the connection stability. In this way, the first welding portion 2231 can offset the suction force between the magnetic circuit components 22 of the magnetic circuit system 2 and prevent the magnetic circuit components 22 of the magnetic circuit system 2 from being weakened or lost when the adhesive force of the glue of the magnetic circuit system 2 is weakened or lost. 2 and other problems such as falling off and failure occur. At the same time, a first stopper 2213 is provided on the side of the first magnetic conductive plate 221 close to the magnetic gap 23, and the first stopper 2213 is used to limit and abut against the first magnet 222, and / or a second stopper 2232 is provided on the side of the second magnetic conductive plate 223 close to the magnetic gap 23, and the second stopper 2232 is used to limit and abut against the second magnet 224. In this way, the two first magnets 222 and / or the two second magnets 224 are prevented from being attracted to each other and approaching each other, thereby avoiding product defects caused by the two first magnets 222 and / or the two second magnets 224 being attracted to each other.

[0072] In one embodiment, if Figures 1 to 7 As shown, the side of the second magnetic plate 223 facing away from the voice coil 32 bends and extends toward the magnetic yoke 21 to form a first welding portion 2231. The first welding portion 2231 is welded to the magnetic yoke 21. This arrangement not only strengthens the connection between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 through the first welding portion 2231, but also facilitates assembly and improves assembly efficiency without affecting the magnetic circuit system 2's drive of the voice coil 32.

[0073] Optionally, the first welding portion 2231 includes a plurality of welding portions. In this embodiment, the plurality of welding portions 2231 are spaced apart along the third direction and are all welded to the magnetic yoke 21. The third direction is perpendicular to the first direction and the second direction.

[0074] As can be understood, the side of the second magnetic plate 223 facing away from the voice coil 32 bends and extends toward the magnetic yoke 21 to form a plurality of spaced first welding portions 2231. Each of the first welding portions 2231 is welded to the magnetic yoke 21. This further strengthens the connection between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2.

[0075] Of course, in other embodiments, such as Figures 1 to 3 、 Figure 5 、 Figure 7 As shown, there is one first welding portion 2231. Optionally, the first welding portion 2231 is located in the middle of the side of the second magnetic conductive plate 223 facing away from the voice coil 32, which is not limited here.

[0076] In one embodiment, the second magnet 224 and the magnetic yoke 21 are provided with a first groove 24 corresponding to the first welding portion 2231 . The first welding portion 2231 is received in the first groove 24 and is welded to the magnetic yoke 21 .

[0077] In this embodiment, if Figures 1 to 8 As shown, the second magnet 224 and the magnetic yoke 21 are both provided with a first groove 24. The first groove 24 provides an accommodation space for the first welding portion 2231. This not only allows the first welding portion 2231 to be positioned and installed, but also allows the first welding portion 2231 to further enhance the structural stability of the magnetic circuit system 2. Optionally, the first welding portion 2231 is provided in a one-to-one correspondence with the first groove 24.

[0078] Optionally, the surface of the first welding portion 2231 facing away from the first groove 24 does not extend beyond the surfaces of the second magnet 224 and the magnetic yoke 21 facing away from the voice coil 32. This arrangement ensures that the first welding portion 2231 does not protrude from the outer surface of the sound-emitting device 100, thereby improving the aesthetics while preventing the first welding portion 2231 from interfering with or affecting other structures. In this embodiment, the side of the first welding portion 2231 facing away from the first groove 24 is flush with the side of the second magnet 224 and the magnetic yoke 21 facing away from the voice coil 32.

[0079] In this embodiment, a welding identification line is provided on the first welding portion 2231 corresponding to the magnetic yoke 21 , so that the first welding portion 2231 and the magnetic yoke 21 can be easily positioned during welding, thereby improving welding efficiency.

[0080] In one embodiment, the magnetic yoke 21 bends and extends toward the side of the second magnetic plate 223 facing away from the voice coil 32 to form a first welding portion 2231. The first welding portion 2231 is welded to the second magnetic plate 223. This arrangement not only strengthens the connection between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 via the first welding portion 2231, but also facilitates assembly and improves assembly efficiency without affecting the magnetic circuit system 2's ability to drive the voice coil 32.

[0081] Optionally, the first welding portion 2231 includes a plurality of welding portions. In this embodiment, the plurality of first welding portions 2231 are spaced apart along the third direction and are all welded to the second magnetic conductive plate 223. The third direction is perpendicular to the first direction and the second direction.

[0082] As can be understood, the periphery of the magnetic yoke 21 bends and extends toward the side of the magnetic circuit assembly 22 facing away from the voice coil 32 to form a plurality of spaced first welding portions 2231. Each of the plurality of first welding portions 2231 is welded to the second magnetic plate 223. This further strengthens the connection between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2.

[0083] Of course, in other embodiments, there is one first welding portion 2231. Optionally, the first welding portion 2231 is welded to the middle position of the side of the second magnetic conductive plate 223 facing away from the voice coil 32, which is not limited here.

[0084] In one embodiment, the second magnet 224 and the second magnetic conductive plate 223 are provided with a first groove 24 corresponding to the first welding portion 2231 . The first welding portion 2231 is received in the first groove 24 and is welded to the second magnetic conductive plate 223 .

[0085] In this embodiment, a first groove 24 is provided on each of the second magnet 224 and the second magnetic conductive plate 223 on a side facing away from the voice coil 32, corresponding to the first welding portion 2231. The first groove 24 provides accommodation space for the first welding portion 2231, thereby enabling positioning and installation of the first welding portion 2231 and further enhancing the structural stability of the magnetic circuit system 2. Optionally, the first welding portions 2231 and the first grooves 24 are provided in a one-to-one correspondence.

[0086] Optionally, the surface of the first welding portion 2231 facing away from the first groove 24 does not extend beyond the surfaces of the second magnet 224 and the second magnetic conductive plate 223 facing away from the voice coil 32. This arrangement ensures that the first welding portion 2231 does not protrude from the outer surface of the sound-producing device 100, thereby improving the aesthetics while preventing the first welding portion 2231 from interfering with or affecting other structures. In this embodiment, the side of the first welding portion 2231 facing away from the first groove 24 is flush with the side of the magnetic circuit assembly 22 facing away from the voice coil 32.

[0087] In this embodiment, a welding identification line is provided on the first welding portion 2231 corresponding to the second magnetic conductive plate 223 , so that the first welding portion 2231 and the second magnetic conductive plate 223 can be easily positioned during welding, thereby improving welding efficiency.

[0088] In one embodiment, a plurality of first stoppers 2213 are provided on a side of each first magnetic conductive plate 221 close to the magnetic gap 23 . The plurality of first stoppers 2213 are spaced apart and all abut against a side of the first magnet 222 facing the magnetic gap 23 .

[0089] In this embodiment, if Figure 5 、 Figure 7 、 Figure 8 As shown, by providing a first stop portion 2213 on the side of the first magnetic conductive plate 221 facing the voice coil 32, the first stop portion 2213 is utilized to limit and abut against the side of the first magnet 222 facing the voice coil 32, thereby preventing the two first magnets 222 from being attracted to each other along the first direction.

[0090] Optionally, a plurality of first stoppers 2213 are provided on a side of the first magnetic conductive plate 221 facing the voice coil 32. The plurality of first stoppers 2213 are spaced apart along a third direction, and each of the plurality of first stoppers 2213 is in limited contact with a side of the first magnet 222 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0091] In one embodiment, first stoppers 2213 are provided at two corners of each first magnetic conductive plate 221 close to the magnetic gap 23 . The two first stoppers 2213 are in limited contact with the side of the first magnet 222 facing the magnetic gap 23 .

[0092] Understandably, Figure 5 、 Figure 7 、 Figure 8 As shown, by providing the first stop portions 2213 at the two corners of the first magnetic conductive plate 221 facing the voice coil 32, the two first stop portions 2213 at the two corners can be used to limit the first magnet 222 without affecting the magnetic field driving effect of the first magnetic conductive plate 221 and the first magnet 222 on the voice coil 32.

[0093] Optionally, the first stop portion 2213 is formed by bending and extending the corner of the first magnetic conductive plate 221 on the side close to the magnetic gap 23 toward the first magnet 222. This can simplify the processing steps.

[0094] Of course, in other embodiments, the first stop portion 2213 may alternatively be a boss formed by a corner portion of the first magnetic conductive plate 221 on the side near the magnetic gap 23 that is recessed toward the first magnet 222, and the boss is formed by the first magnetic conductive plate 221 through a stamping and half-shearing process. It is understood that the side of the first magnetic conductive plate 221 facing away from the first magnet 222 is recessed toward the first magnet 222, so that the side of the first magnetic conductive plate 221 facing the first magnet 222 protrudes to form the first stop portion 2213. Optionally, the height of the first stop portion 2213 protruding from the side of the first magnetic conductive plate 221 facing the first magnet 222 is consistent with the thickness of the first magnetic conductive plate 221 along the second direction.

[0095] In one embodiment, a first limiting groove 2221 is provided on the side of each first magnet 222 facing the magnetic gap 23 corresponding to the first stop portion 2213, and the first stop portion 2213 is limited in the first limiting groove 2221, and the surface of the first stop portion 2213 facing the magnetic gap 23 does not exceed the surface of the first magnet 222 facing the magnetic gap 23.

[0096] In this embodiment, if Figure 5 、 Figure 7 、 Figure 8 As shown, by providing a first limiting groove 2221 on the side of the first magnet 222 facing the voice coil 32, the first limiting groove 2221 corresponds to the first stop portion 2213. In this way, the first stop portion 2213 is limited within the first limiting groove 2221. Therefore, the first limiting groove 2221 can be used to position the first stop portion 2213 and prevent the two first magnets 222 from attracting each other along the first direction. It can be understood that the first limiting groove 2221 is formed by removing material from the position of the first magnet 222 corresponding to the first stop portion 2213.

[0097] Optionally, the surface of the first stopper 2213 facing the magnetic gap 23 does not extend beyond the surface of the first magnet 222 facing the magnetic gap 23. This arrangement effectively prevents collision between the voice coil 32 and the first stopper 2213, while also strengthening the first stopper 2213 and thereby increasing product stability. In this embodiment, the side of the first stopper 2213 facing the magnetic gap 23 is flush with the side of the first magnet 222 facing the magnetic gap 23.

[0098] In this embodiment, the lower end surface of the first stop portion 2213 does not extend beyond the surface of the first magnet 222 facing away from the first magnetic conductive plate 221. Optionally, the lower end surface of the first stop portion 2213 is flush with the surface of the first magnet 222 facing away from the first magnetic conductive plate 221. This effectively increases the stopping force of the first stop portion 2213 on the first magnet 222, ensuring product stability. It should be noted that the shape of the first stop portion 2213 can be cylindrical or another shape, as long as it matches the first limiting groove 2221, and is not limited here.

[0099] In one embodiment, a plurality of second stoppers 2232 are provided on a side of each second magnetic conductive plate 223 close to the magnetic gap 23 . The plurality of second stoppers 2232 are spaced apart and all abut against a side of the second magnet 224 facing the magnetic gap 23 .

[0100] In this embodiment, if Figure 5 、 Figure 7 and Figure 8 As shown, by providing a second stop portion 2232 on the side of the second magnetic conductive plate 223 facing the voice coil 32, the second stop portion 2232 is utilized to limit and abut against the side of the second magnet 224 facing the voice coil 32, thereby preventing the two second magnets 224 from being attracted to each other along the first direction.

[0101] Optionally, a plurality of second stoppers 2232 are provided on a side of the second magnetic conductive plate 223 facing the voice coil 32. The plurality of second stoppers 2232 are spaced apart along a third direction, and each of the plurality of second stoppers 2232 is in limited contact with a side of the second magnet 224 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0102] In one embodiment, each second magnetic conductive plate 223 has two second stoppers 2232 at two corners close to the magnetic gap 23 . The two second stoppers 2232 are in limited contact with the side of the second magnet 224 facing the magnetic gap 23 .

[0103] Understandably, Figure 5 、 Figure 7 and Figure 8 As shown, by providing second stop portions 2232 at the two corners of the second magnetic conductive plate 223 facing the voice coil 32, the two second stop portions 2232 at the two corners can be used to limit the second magnet 224 without affecting the magnetic field driving effect of the second magnetic conductive plate 223 and the second magnet 224 on the voice coil 32.

[0104] Optionally, the second stop portion 2232 is formed by bending and extending a corner portion of the second magnetic conductive plate 223 on a side close to the magnetic gap 23 toward the second magnet 224. This simplifies the processing steps.

[0105] Of course, in other embodiments, the second stop portion 2232 is a boss formed by a corner portion of the second magnetic conductive plate 223 on the side near the magnetic gap 23, which is recessed toward the second magnet 224. The boss is formed by the second magnetic conductive plate 223 through a stamping and half-shearing process. It is understood that the side of the second magnetic conductive plate 223 facing away from the second magnet 224 is recessed toward the second magnet 224, so that the side of the second magnetic conductive plate 223 facing the second magnet 224 protrudes to form the second stop portion 2232. Optionally, the height of the second stop portion 2232 protruding from the side of the second magnetic conductive plate 223 facing the second magnet 224 is consistent with the thickness of the second magnetic conductive plate 223 along the second direction.

[0106] In one embodiment, a second limiting groove 2241 is provided on the side of each second magnet 224 facing the magnetic gap 23 corresponding to the second stop portion 2232, and the second stop portion 2232 is limited in the second limiting groove 2241, and the surface of the second stop portion 2232 facing the magnetic gap 23 does not exceed the surface of the first magnet 222 facing the magnetic gap 23.

[0107] In this embodiment, if Figure 5 、 Figure 7 and Figure 8 As shown, by providing a second limiting groove 2241 on the side of the second magnet 224 facing the voice coil 32, the second limiting groove 2241 corresponds to the second stop portion 2232, so that the second stop portion 2232 is limited in the second limiting groove 2241. Therefore, the second limiting groove 2241 can be used to position the second stop portion 2232 and prevent the two second magnets 224 from attracting each other along the first direction. It can be understood that the second limiting groove 2241 is formed by removing material from the second magnet 224 at the position corresponding to the second stop portion 2232.

[0108] Optionally, the surface of the second stopper 2232 facing the magnetic gap 23 does not extend beyond the surface of the second magnet 224 facing the magnetic gap 23. This arrangement effectively prevents collision between the voice coil 32 and the second stopper 2232 while also strengthening the second stopper 2232 and thereby increasing product stability. In this embodiment, the side of the second stopper 2232 facing the magnetic gap 23 is flush with the side of the second magnet 224 facing the magnetic gap 23.

[0109] In this embodiment, the lower end surface of the second stop portion 2232 is flush with the surface of the second magnet 224 facing away from the second magnetic conductive plate 223. This effectively increases the stopping force of the second stop portion 2232 on the second magnet 224, ensuring product stability. It should be noted that the shape of the second stop portion 2232 can be cylindrical or other shapes, as long as it matches the second limiting groove 2241, and is not limited here.

[0110] To further improve the installation stability and reliability of the magnetic circuit system 2 of the sound-generating device 100, in one embodiment, the housing 1 is a metal housing, and the housing 1 is welded to the first magnetic conductive plate 221. Optionally, the housing 1 is a metal housing or at least partially made of metal. In this way, while the housing 1 is welded to the first magnetic conductive plate 221, the magnetic yoke 21 and the magnetic circuit assembly 22 are welded together using the first welding portion 2231. As a result, the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 are welded and fixed to the housing 1, thereby further improving the reliability of the magnetic circuit system 2 and the stability of the connection between the magnetic circuit system 2 and the housing 1.

[0111] Of course, in other embodiments, the housing 1 and the first magnetic conductive plate 221 may also be bonded together, which is not limited here.

[0112] In order to further improve the connection stability between the housing 1 and the magnetic circuit system 2, in one embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, the inner wall of the housing 1 is provided with a protruding stopper 1211, which is connected to the first magnetic conductive plate 221. It will be appreciated that the stopper 1211 extends along the plane of the first direction. Optionally, the stopper 1211 is annular. The stopper 1211 is connected to the side of the first magnetic conductive plate 221 facing away from the first magnet 222. Optionally, the stopper 1211 and the first magnetic conductive plate 221 are welded or adhesively bonded, which is not limited here.

[0113] Optionally, the limiting portion 1211 is arranged in a ring shape along the interior of the housing 1. The limiting portion 1211 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage, thereby achieving a high waterproof goal.

[0114] It is understandable that in order to ensure that the diaphragm assembly 31 has sufficient vibration space, the limiting portion 1211 is optionally provided with an escape groove 1212 corresponding to the folding ring portion of the diaphragm assembly 31. In this way, the escape groove 1212 can be used to provide vibration and escape space for the diaphragm assembly 31 during vibration.

[0115] In one embodiment, one side of the first magnetic conductive plate 221 close to the magnetic gap 23 protrudes along the second direction toward the direction away from the first magnet 222 to form a protrusion 2211, and the protrusion 2211 cooperates with the first magnetic conductive plate 221 to form a limiting groove 2212. The limiting portion 1211 is limited in the limiting groove 2212 and is in limiting contact with the protrusion 2211.

[0116] In this embodiment, if Figures 3 to 8As shown, by protruding a protrusion 2211 on one side of the first magnetic conductive plate 221 close to the magnetic gap 23, the first magnetic conductive plate 221 increases the density of magnetic flux lines passing through the voice coil 32 through the protrusion 2211, improves the magnetic induction intensity, and further expands the magnetic field area where the voice coil 32 is located, so that the driving force factor of the voice coil 32 can be symmetrical relative to the static equilibrium position.

[0117] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312 connected to the diaphragm 311, and the vibration plate 312 is connected to the voice coil 32; the outer shell 1 includes a connected annular bracket 11 and a bottom shell 12, the periphery of the diaphragm 311 is combined with the inner wall of the annular bracket 11, and the diaphragm 311 and the annular bracket 11 are integrally hot-pressed or injection-molded, and the bottom shell 12 is connected to the magnetic circuit system 2.

[0118] In this embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 9 As shown, the diaphragm 311 can optionally be annular, with the vibration plate 312 disposed in the center of the diaphragm 311. Optionally, the vibration plate 312 can be provided with reinforcing ribs 3121 that extend concavely toward the side closest to the voice coil 32. This can enhance the structural strength of the vibration plate 312. It is understood that there can be one or more reinforcing ribs 3121, and one or more reinforcing ribs 3121 can extend along the first direction or the third direction, without limitation.

[0119] Optionally, the vibration plate 312 is hot-pressed or injection-molded using one of magnesium-aluminum alloy, aluminum, polyethylene naphthalate, polyethylene terephthalate, liquid crystal polymer, or polyetherimide. Alternatively, the diaphragm 311 can be hot-pressed or injection-molded using one of silicone rubber, AEM rubber, or ACM rubber. In this embodiment, the prepared vibration plate 312 is placed as an insert in a mold, and then the diaphragm 311 is molded, so that the vibration plate 312 and diaphragm 311 form an integrated structure.

[0120] In this embodiment, if Figures 1 to 4 、 Figure 9 As shown, the housing 1 includes an annular support 11, and the diaphragm 311 is combined with the inner circumferential wall of the annular support 11. Optionally, the diaphragm 311 and the annular support 11 are integrally formed by hot pressing or injection molding. It is understood that the annular support 11 is made of plastic and can be integrally formed with the diaphragm 311 of the vibration system 3 through an injection molding process.

[0121] As can be understood, the annular support 11 is placed in the mold as an insert, and then the diaphragm raw material is injection-molded into the mold to form the diaphragm 311. During the injection of the raw material, the raw material combines with the annular support 11, thereby achieving a connection between the two, that is, the diaphragm 311 is combined with the inner circumferential wall of the annular support 11. Alternatively, the diaphragm 311 is integrally formed with the annular support 11 through a hot pressing process.

[0122] In this embodiment, the diaphragm 311 and the annular bracket 11 are integrally formed, which can improve the connection stability between the two. No glue is required between the diaphragm 311 and the annular bracket 11, thereby meeting the high-level waterproof requirements of electronic equipment.

[0123] In this embodiment, if Figures 1 to 4 As shown, the housing 1 further includes a bottom shell 12 , which is an annular frame structure and is bonded or inlaid to the side of the annular bracket 11 facing the magnetic circuit system 2 . The magnetic circuit system 2 is connected inside the bottom shell 12 .

[0124] It is understood that the bottom shell 12 can be made of plastic or metal. In this embodiment, the bottom shell 12 can be made of metal, that is, the bottom shell 12 is a metal shell. In this way, the bottom shell 12 is welded to the first magnetic conductive plate 221 of the magnetic circuit assembly 22, thereby further improving the connection stability between the housing 1 and the magnetic circuit system 2.

[0125] In this embodiment, the first magnet 222, the second magnetic conductive plate 223, and the second magnet 224 are sequentially connected to the first magnetic conductive plate 221 by bonding. It is understood that the two first magnetic conductive plates 221 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage, thereby achieving high waterproofing.

[0126] In one embodiment, if Figures 1 to 3 As shown, the bottom shell 12 includes an annular body 121 and a side wall 122 connected to the annular body 121. The first magnetic plate 221 is connected to the annular body 121 on the side facing away from the magnetic yoke 21, and the side wall 122 is welded to the magnetic yoke 21. This effectively enhances the connection strength between the bottom shell 12, the magnetic yoke 21, and the magnetic circuit system 2.

[0127] In one embodiment, if Figures 1 to 3 As shown, the bottom shell 12 includes an annular body 121 and a side wall 122 connected to the annular body 121. The first magnetic conductive plate 221 is connected to the annular body 121 on the side facing away from the magnetic guide yoke 21. The side wall 122 has a receiving hole 1221, and the magnetic circuit assembly 22 extends into the receiving hole 1221.

[0128] It is understood that by providing the receiving hole 1221 in the side wall 122, each magnetic circuit assembly 22 can extend into the receiving hole 1221, thereby increasing the volume of each magnetic circuit assembly 22, improving the magnetic field strength, and thereby enhancing the acoustic performance of the sound-generating device 100. It should be noted that the outer surface of the magnetic circuit assembly 22 does not extend beyond the outer surface of the side wall 122. Optionally, the outer surface of the magnetic circuit assembly 22 is substantially flush with the outer surface of the side wall 122. In this way, the outer shape of the sound-generating device 100 is more regular, making it easier to adapt to the reserved space of the electronic device.

[0129] In one embodiment, the vibration system 3 further includes a skeleton 33 , which includes two skeletons 33 and are respectively arranged at both ends of the voice coil 32 along the third direction. The skeleton 33 connects the voice coil and the vibration plate 312 ; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0130] In this embodiment, if Figure 3 、 Figure 10 As shown, the voice coil 32 is connected to the diaphragm assembly 31 via a bobbin 33. The bobbin 33 can be used to adjust the vertical position and depth of the voice coil 32 within the magnetic gap 23, placing the voice coil 32 in a location with denser magnetic flux lines, thereby improving magnetic circuit utilization. Optionally, two bobbins 33 are provided, one at each end of the voice coil 32 along the third direction.

[0131] It can be understood that the voice coil 32 is a flat voice coil formed by winding a wire. The voice coil 32 includes two opposite long axis sides arranged in the magnetic gap 23 and a short axis side connecting the two long axis sides. The skeleton 33 includes two skeletons 33, and the two skeletons 33 are arranged at both ends of the voice coil 32 along the long axis direction (i.e., the third direction), and are respectively connected to the vibration plate 312 of the diaphragm assembly 31 and the short axis side of the voice coil 32. In this way, the skeleton 33 does not occupy the width of the magnetic gap 23, and can reduce the width of the sound-emitting device 100, or when the width dimension is constant, the setting dimension of the magnetic circuit assembly 22 can be increased to improve the magnetic field performance; at the same time, the skeleton 33 can flexibly adjust the (height) position of the voice coil 32 in the magnetic gap 23, which is convenient for operation.

[0132] In one embodiment, the vibration system 3 further includes a centering support 34, and there are two centering supports 34, which are distributed at both ends of the voice coil 32 corresponding to the skeleton 33; wherein each skeleton 33 includes a first connecting portion 331 and a second connecting portion 332 and a third connecting portion 333 respectively arranged at both ends of the first connecting portion 331 and bent toward both sides of the first connecting portion 331. The two first connecting portions 331 are located at both ends of the voice coil 32 along the third direction and are respectively connected to two side surfaces opposite to the voice coil 32. The two second connecting portions 332 are respectively connected to the vibration plate 312, and the two third connecting portions 333 are respectively connected to the two centering supports 34.

[0133] In this embodiment, if Figures 1 to 4 、 Figure 10 As shown, each centering support 34 is provided with at least two electrically connected spot welding pads. One of the spot welding pads on each centering support 34 is connected to an external power line, while the other spot welding pad on each centering support 34 is connected to a lead of the voice coil 32. This allows current to flow into the voice coil 32 through one centering support 34 and out through the other centering support 34, thus achieving electrical connection between the voice coil 32 and the external power source. This arrangement not only solves the connection problem between the voice coil 32 and the external power source, but also improves the balance of the voice coil 32, thereby reducing polarization of the vibration system 3.

[0134] It can be understood that the skeleton 33 can be optionally an integrally molded structure, that is, the skeleton 33 includes a first connecting part 331, a second connecting part 332 and a third connecting part 333, all of which are plate-shaped, wherein the two first connecting parts 331 of the two skeletons 33 are located at both ends of the voice coil 32 along the third direction, and are respectively bonded to the two side surfaces opposite to the voice coil 32, the two second connecting parts 332 are respectively connected to the vibration plate 312, and the two third connecting parts 333 are respectively connected to the two centering supports 34.

[0135] Through the above arrangement, this embodiment solves the connection problem between the voice coil 32 and the external power supply and improves the balance of the voice coil 32 , thereby reducing the polarization phenomenon of the vibration system 3 .

[0136] In one embodiment, each centering support 34 includes an outer fixing portion 341 , an inner fixing portion 342 , and an elastic arm 343 connecting the outer fixing portion 341 and the inner fixing portion 342 . Each inner fixing portion 342 is connected to a third connecting portion 333 and has an inner solder pad electrically connected to the lead of the voice coil 32 .

[0137] In this embodiment, if Figures 1 to 4 、 Figure 10 As shown, two centering supports 34 are provided at both ends of the sound-generating device 100 along the long axis direction. Each centering support 34 includes an inner fixing portion 342, an elastic arm 343 and an outer fixing portion 341. The inner fixing portion 342 is connected to the skeleton 33, and the outer fixing portion 341 is provided on the outer shell 1. The two ends of the elastic arm 343 are respectively connected to the inner fixing portion 342 and the outer fixing portion 341. The outer fixing portion 341 is also provided with an outer soldering pad 3411 that can be electrically connected to an external circuit, and the inner fixing portion 342 is provided with an inner soldering pad that is electrically connected to the lead of the voice coil 32.

[0138] As can be understood, the provision of the external solder pad 3411 enables the centering support 34 to be connected to the external circuit, thereby facilitating the introduction of external circuit current into the voice coil 32. It should be noted that an internal solder pad is provided on the internal fixing portion 342, and the lead of the voice coil 32 is electrically connected to the internal solder pad.

[0139] Optionally, the outer pad 3411 is an integral forming part with the centering fin 34, thereby reducing the number of structural parts and facilitating assembly of the sound production device 100. Meanwhile, the skeleton 33 is connected with the inner fixing part 342, that is, the skeleton 33 is connected with the vibrating plate 312, the voice coil 32 and the centering fin 34 at the same time, which can improve vibration consistency of the vibration system 3, improve response sensitivity of the sound production device 100, and reduce distortion, thereby further optimizing the acoustic performance of the sound production device 100.

[0140] In an embodiment, the shell 1 is provided with a relief 1222 corresponding to each outer fixing part 341, each outer fixing part 341 is arranged in the relief 1222, and an outer pad 3411 is arranged, and the magnetic yoke 21 is bent and extended to form a positioning protrusion 211 corresponding to each relief 1222 towards the outer fixing part 341.

[0141] In the embodiment, as shown in Figures 1 to 4 the outer fixing part 341 of the centering fin 34 is at least partially located outside the shell 1, thereby facilitating electrical connection between the outer pad 3411 and the external circuit. The relief 1222 is arranged on the shell 1, so that the outer fixing part 341 of the centering fin 34 extends outside the shell 1.

[0142] It can be understood that, in order to cover the relief 1222, the magnetic yoke 21 is bent and extended to form a positioning protrusion 211 corresponding to each relief 1222 towards the outer fixing part 341, that is, the outer fixing part 341 is located between the positioning protrusion 211 and the relief 1222 of the shell 1.

[0143] In the embodiment, the centering fin 34 provides a constraint force for constraining the voice coil 32 to vibrate along the vibration direction, and at the same time, the external circuit current is introduced into the voice coil 32, thereby simplifying the number of structural parts of the sound production device 100, simplifying the assembly process, and improving assembly efficiency.

[0144] The present application also provides an electronic device comprising the sound production device 100. The specific structure of the sound production device 100 is described in the foregoing embodiments. Since the electronic device adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be described here.

[0145] Optionally, the electronic device of the present application can be a mobile phone, a tablet computer or other portable mobile electronic product, or a watch, a VR, an AR or other wearable device, which is not limited here.

[0146] 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: shell; A magnetic circuit system connected to the housing, comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, wherein the two magnetic circuit components are spaced apart along a first direction and a magnetic gap is formed therebetween, and each magnetic circuit component comprises a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked in sequence along a second direction, wherein the second magnet is connected to the magnetic yoke, wherein a periphery of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, wherein the first welding portion is welded to the other, and the second direction is perpendicular to the first direction; and a vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, wherein the periphery of the diaphragm assembly is connected to the housing, the voice coil is flat, the axial direction of the voice coil is along the first direction and the voice coil is inserted into the magnetic gap, and the voice coil drives the diaphragm assembly to vibrate along the second direction; In which, a first stop portion is provided on the side of the first magnetic conductive plate close to the magnetic gap, and the first stop portion is in limited contact with the side of the first magnet facing the magnetic gap; and / or a second stop portion is provided on the side of the second magnetic conductive plate close to the magnetic gap, and the second stop portion is in limited contact with the side of the second magnet facing the magnetic gap.

2. The sound-generating device according to claim 1, wherein: The second magnetic plate is bent and extended toward the magnetic yoke on a side facing away from the voice coil to form the first welding portion. The second magnet and the magnetic yoke are provided with a first groove corresponding to the first welding portion. The first welding portion is received in the first groove and welded to the magnetic yoke. The surface of the first welding portion facing away from the first groove does not extend beyond the surfaces of the second magnet and the magnetic yoke facing away from the voice coil. Alternatively, the magnetic yoke is bent and extended toward the side of the second magnetic plate facing away from the voice coil to form the first welding portion, and the second magnet and the second magnetic plate are provided with a first groove corresponding to the first welding portion, and the first welding portion is accommodated in the first groove and is welded to the second magnetic plate, and the surface of the first welding portion facing away from the first groove does not exceed the surface of the second magnet and the second magnetic plate facing away from the voice coil.

3. The sound-generating device according to claim 1, wherein: A plurality of first stoppers are provided on a side of each first magnetic conductive plate close to the magnetic gap, the plurality of first stoppers are spaced apart, and all of them are in limited contact with the side of the first magnet facing the magnetic gap; or, the first stoppers are provided on two corners of each first magnetic conductive plate close to the magnetic gap, and both of the first stoppers are in limited contact with the side of the first magnet facing the magnetic gap; And / or, the first stop portion is formed by bending and extending the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet; or, the first stop portion is a boss formed by recessing the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet, and the boss is formed by the first magnetic conductive plate through a stamping and half-shearing process; And / or, a first limiting groove is provided on the side of each first magnet facing the magnetic gap corresponding to the first stop portion, the first stop portion is limited in the first limiting groove, and the surface of the first stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

4. The sound-generating device according to claim 1, wherein: A plurality of second stoppers are provided on a side of each second magnetic conductive plate close to the magnetic gap, the plurality of second stoppers are spaced apart, and all of them are in limited contact with the side of the second magnet facing the magnetic gap; or, a second stopper is provided on two corners of each second magnetic conductive plate close to the magnetic gap, and both of the second stoppers are in limited contact with the side of the second magnet facing the magnetic gap; And / or, the second stop portion is formed by bending and extending the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet; or, the second stop portion is a boss formed by recessing the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet, and the boss is formed by the second magnetic conductive plate through a stamping and half-shearing process; And / or, a second limiting groove is provided on the side of each second magnet facing the magnetic gap corresponding to the second stop portion, the second stop portion is limited in the second limiting groove, and the surface of the second stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

5. The sound-generating device according to claim 1, wherein: The outer shell is a metal shell, and the outer shell is welded to the first magnetic conductive plate; And / or, the first magnet and the second magnet of each magnetic circuit assembly are magnetized along the second direction and in opposite directions, and the magnetization directions of the two first magnets and the two second magnets facing each other along the first direction are opposite.

6. The sound-generating device according to claim 1, wherein: A limiting portion is protruded from the inner wall of the shell, and the limiting portion is connected to the first magnetic conductive plate; The first magnetic conductive plate has a side close to the magnetic gap that is raised along the second direction away from the first magnet to form a protrusion, and the protrusion cooperates with the first magnetic conductive plate to form a limiting groove, and the limiting portion is limited in the limiting groove and abuts against the protrusion. And / or, the limiting portion is provided with an avoidance groove corresponding to the folding ring portion of the diaphragm assembly.

7. The sound-generating device according to any one of claims 1 to 6, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate connected to the diaphragm, and the vibration plate is connected to the voice coil; The housing includes a connected annular bracket and a bottom shell. The periphery of the diaphragm is combined with the inner wall of the annular bracket, and the diaphragm and the annular bracket are integrally hot-pressed or injection-molded. The bottom shell is connected to the magnetic circuit system.

8. The sound-generating device according to claim 7, wherein: The bottom shell includes an annular body and a side wall connected to the annular body, the first magnetic conductive plate is connected to the annular body on a side facing away from the magnetic conductive yoke, and the side wall is welded to the magnetic conductive yoke; And / or, the bottom shell includes an annular body and a side wall connected to the annular body, the first magnetic conductive plate is connected to the annular body on a side facing away from the magnetic conductive yoke, the side wall has a receiving hole, and the magnetic circuit assembly extends into the receiving hole; And / or, the bottom shell is a metal shell, and the bottom shell is welded to the first magnetic conductive plate; And / or, the vibration plate is provided with a reinforcing rib extending concavely toward a side close to the voice coil.

9. The sound-generating device according to claim 7, wherein: The vibration system further includes a frame, wherein the frame includes two frames and is respectively provided at two ends of the voice coil along the third direction, and the frames connect the voice coil and the vibration plate; The third direction is perpendicular to the first direction and the second direction respectively.

10. The sound-generating device according to claim 9, wherein: The vibration system further includes two centering supports, which are distributed at both ends of the voice coil corresponding to the skeleton; Each of the skeletons includes a first connecting portion and a second connecting portion and a third connecting portion respectively arranged at both ends of the first connecting portion and bent toward both sides of the first connecting portion. The two first connecting portions are located at both ends of the voice coil along the third direction and are respectively connected to two side surfaces opposite to the voice coil. The two second connecting portions are respectively connected to the vibration plate, and the two third connecting portions are respectively connected to the two centering supports.

11. The sound generating device according to claim 10, wherein: Each of the centering supports includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion, each of the inner fixing portions is connected to one of the third connecting portions and is provided with an inner solder pad electrically connected to the lead of the voice coil; The housing is provided with a relief opening corresponding to each of the external fixing parts, each of the external fixing parts is passed through the relief opening and provided with an external soldering pad, and the magnetic yoke is bent and extended toward the external fixing part corresponding to each of the relief openings to form a positioning protrusion.

12. An electronic device, characterized in that: The electronic device includes the sound emitting device according to any one of claims 1 to 11.

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