Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a shell, a magnetic circuit system, a vibration system and a metal connecting piece, the magnetic circuit system is connected with the shell, the magnetic circuit system comprises a magnetic conductive yoke and two magnetic circuit assemblies arranged on one side of the magnetic conductive yoke, the two magnetic circuit assemblies are arranged at intervals in the first direction, a magnetic gap is formed between the two magnetic circuit assemblies, the vibration system comprises a vibrating diaphragm assembly and a voice coil connected to the vibrating diaphragm assembly, the periphery of the vibrating diaphragm assembly is connected with the shell, the voice coil is flat, the axial direction of the voice coil is in the first direction and inserted into the magnetic gap, and the voice coil drives the vibrating diaphragm assembly to vibrate in the second direction. The second direction is perpendicular to the first direction, and the metal connecting piece is welded to the magnetic conductive yoke and the magnetic circuit assembly. The invention aims to improve the installation stability of the magnetic circuit system in the sound production device and avoid the problems of falling 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: shell; a magnetic circuit system connected to the housing, the magnetic circuit system comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, the two magnetic circuit components being spaced apart along a first direction and forming a magnetic gap therebetween; 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 in a second direction, the second direction being perpendicular to the first direction; and A metal connector is welded to the magnetic yoke and the magnetic circuit assembly.

[0006] In one embodiment, a welding groove is provided on the outer wall of the magnetic circuit system, and the metal connecting member is accommodated in the welding groove and is welded to the magnetic yoke and the magnetic circuit assembly.

[0007] In one embodiment, the housing is provided with a recessed groove corresponding to the welding groove, and one end of the metal connector away from the magnetic yoke extends into the recessed groove and is welded to the housing; And / or, the surface of the metal connector facing away from the welding groove does not exceed the outer surfaces of the magnetic yoke and the magnetic circuit assembly; And / or, the metal connecting parts include multiple ones, and each side of the magnetic circuit component facing away from the voice coil is welded to at least one of the metal connecting parts; or, the metal connecting part includes one, and the metal connecting part is located in the middle position of the side of the magnetic circuit component facing away from the voice coil.

[0008] In one embodiment, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate, and a second magnet stacked in sequence along the second direction, and the second magnet is connected to the magnetic conductive yoke; Wherein, the metal connecting member is welded to the first magnetic conductive plate, the second magnetic conductive plate and the magnetic conductive yoke.

[0009] In one embodiment, the metal connector is provided with a first through hole corresponding to the first magnetic conductive plate, and a first protrusion is provided on an outer wall of the first magnetic conductive plate. The first protrusion is inserted into the first through hole and is welded to the metal connector; And / or, the metal connector is provided with a second through hole corresponding to the second magnetic conductive plate, the outer wall of the second magnetic conductive plate is provided with a second protrusion, the second protrusion is passed through the second through hole, and is welded to the metal connector.

[0010] In one embodiment, 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; And / or, the metal connectors are provided with welding identification lines corresponding to the first magnetic conductive plate, the second magnetic conductive plate and the magnetic conductive yoke respectively; And / or, the shell is connected to the first magnetic conductive plate by welding or bonding.

[0011] In one embodiment, a limiting portion is protruded from the inner wall of the housing, 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.

[0012] In one embodiment, 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.

[0013] In one embodiment, the bottom shell includes an annular body and a side wall connected to the annular body, the side of the magnetic circuit assembly away from the magnetic yoke is connected to the annular body, and the side wall is welded to the magnetic yoke; And / or, the bottom shell includes an annular body and a side wall connected to the annular body, the side of the magnetic circuit component away from the magnetic yoke is connected to the annular body, the side wall has a receiving hole, and the magnetic circuit component extends to the receiving hole; And / or, the bottom shell is a metal shell, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate, and a second magnet stacked in sequence along the second direction, the second magnet is connected to the magnetic conductive yoke, 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.

[0014] In one embodiment, the vibration system further includes a frame and a centering support, the frame includes two frames and is respectively provided at both ends of the voice coil along a third direction, the frame connects the voice coil and the vibration plate, and the third direction is perpendicular to the first direction and the second direction respectively; There are two centering supports, which are distributed at both ends of the voice coil corresponding to the frame. Each centering support includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion. Each inner fixing portion is connected to one of the frames and has 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.

[0015] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device.

[0016] The sound-generating device of the technical solution of the present invention connects the magnetic circuit system and the vibration system to the shell, thereby realizing 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 arranged on one side of the magnetic yoke, so that the two magnetic circuit components are arranged at intervals along the 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, so that when power is turned on, the voice coil can vibrate in the magnetic gap under the drive of the magnetic circuit system, thereby driving the diaphragm component to vibrate and make sound, so that the sound-generating device has a sound-generating function; at the same time, by rotating the voice coil axially along the first direction, so that the voice coil is arranged in a flat shape. Compared with the sound-producing device with an annular voice coil and an annular magnetic gap, the sound-producing device of the present invention has a more compact structure and occupies less assembly space. Furthermore, by arranging a metal connector, the metal connector is welded to the magnetic yoke and the magnetic circuit component of the magnetic circuit system, so that the magnetic yoke and the magnetic circuit component of the magnetic circuit system are further connected as a whole by the metal connector, thereby improving the connection stability. In this way, the metal connector can offset the suction force between the magnetic circuit components of the magnetic circuit system, and prevent the magnetic circuit components of the magnetic circuit system from falling off and failing when the adhesive force of the glue of the magnetic circuit system declines or disappears. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention; Figure 2 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention from another perspective; Figure 3 A partially exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention; Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention; Figure 5 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by the present invention; Figure 6 A schematic cross-sectional view of another embodiment of the sound-generating device provided by the present invention; Figure 7 A cross-sectional schematic diagram of an embodiment of a magnetic circuit system provided by the present invention; Figure 8A cross-sectional schematic diagram of another embodiment of the magnetic circuit system provided by the present invention; 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; 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.

[0019] Description of Figure Numbers: 100. Sounding device; 1. Housing; 11. Ring bracket; 12. Bottom shell; 121. Ring body; 1211. Positioning portion; 1212. Avoidance groove; 1213. Recessed groove; 122. Side wall; 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. Positioning groove; 222. First magnet; 223. Second magnetic plate; 2231. Second Protrusion; 224, second magnet; 23, magnetic gap; 24, welding groove; 3, vibration system; 31, diaphragm assembly; 311, diaphragm; 312, vibration plate; 3121, reinforcement 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; 4, metal connector; 41, welding identification line; 42, second through hole.

[0020] 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

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In this embodiment, the sound-generating device 100 is provided with a metal connector 4 on the outside of the magnetic circuit system 2, so that the metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit assembly 22. In this way, even if the glue of the magnetic circuit system 2 fails, it will not fall off due to the welding fixation of the metal connector 4.

[0029] Please refer to Figures 1 to 10As shown, in an embodiment of the present invention, the sound-generating device 100 includes a shell 1, a magnetic circuit system 2, a vibration system 3 and a metal connector 4. The magnetic circuit system 2 is connected to the shell 1. The magnetic circuit system 2 includes a magnetic yoke 21 and two magnetic circuit components 22 arranged on one side of the magnetic yoke 21. The two magnetic circuit components 22 are arranged at intervals along a first direction and form a magnetic gap 23 therebetween. The vibration system 3 includes a diaphragm component 31 and a voice coil 32 connected to the diaphragm component 31. The periphery of the diaphragm component 31 is connected to the shell 1. The voice coil 32 is formed in a flat shape. The axial direction of the voice coil 32 is along the first direction and is inserted into the magnetic gap 23. The voice coil 32 drives the diaphragm component 31 to vibrate in a second direction. The second direction is perpendicular to the first direction. The metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit component 22.

[0030] 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.

[0031] 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.

[0032] 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 miniature electronic device, such as a smart wearable device (e.g., a smartwatch). It will be appreciated that the axial direction of the voice coil 32 of the vibration system 3 is along a first direction. Optionally, the voice coil 32 is flat, so that the voice coil 32 drives 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, occupying less assembly space, compared to sound-generating devices with an annular voice coil and an annular magnetic gap.

[0033] Understandably, Figures 3 to 8As 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.

[0034] In this embodiment, a metal connector 4 is provided so that the metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit assembly 22. In this way, the metal connector 4 is used to further strengthen the connection strength between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2, so that the magnetic circuit system 2 is further connected as a whole through the metal connector 4, thereby improving the structural stability of the magnetic circuit system 2. In this way, the metal connector 4 can offset the suction force between the magnetic circuit assemblies 22 of the magnetic circuit system 2, and can prevent the magnetic circuit assembly 22 of the magnetic circuit system 2 from falling off and failing when the glue bonding force of the magnetic circuit system 2 declines or disappears.

[0035] Optionally, the metal connector 4 includes multiple metal connectors 4, and each magnetic circuit component 22 is welded to at least one metal connector 4 on the side facing away from the voice coil 32, which is not limited here. This can further improve the structural stability of the magnetic circuit system 2. It is understandable that the multiple metal connectors 4 are arranged at intervals along the third direction. In this embodiment, Figures 1 to 3 As shown, the metal connecting member 4 includes one. Optionally, the metal connecting member 4 is located in the middle of the side of the magnetic circuit assembly 22 facing away from the voice coil 32, which is not limited here.

[0036] 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. In this way, when power is turned on, the voice coil 32 can vibrate in the magnetic gap 23 under the drive of the magnetic circuit system 2, thereby driving the diaphragm component 31 to vibrate and make sound, so that the sound-generating device 100 has a sound-generating function; at the same time, by setting the voice coil 32 The axial direction is along the first direction, so that the voice coil 32 is arranged in a flat shape. Compared with the sound-emitting device with an annular voice coil and an annular magnetic gap, the structure of the sound-emitting device 100 of the present invention is more compact and occupies less assembly space; further, by arranging the metal connector 4, the metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit component 22 of the magnetic circuit system 2, so that the magnetic yoke 21 and the magnetic circuit component 22 of the magnetic circuit system 2 are further connected as a whole by the metal connector 4, thereby improving the connection stability. In this way, the metal connector 4 can offset the suction force between the magnetic circuit components 22 of the magnetic circuit system 2, and prevent the magnetic circuit component 22 of the magnetic circuit system 2 from falling off and failing when the glue bonding force of the magnetic circuit system 2 declines or disappears.

[0037] In one embodiment, a welding groove 24 is provided on the outer wall of the magnetic circuit system 2 , and the metal connector 4 is accommodated in the welding groove 24 and welded to the magnetic yoke 21 and the magnetic circuit assembly 22 .

[0038] In this embodiment, if Figures 1 to 3 As shown, by setting a welding groove 24 on the outside of the magnetic circuit system 2, the welding groove 24 is used to provide an accommodation space for the metal connector 4, which can not only realize the positioning and installation of the metal connector 4, but also further enhance the structural stability of the magnetic circuit system 2 by using the metal connector 4.

[0039] Optionally, the surface of the metal connector 4 facing away from the welding groove 24 does not extend beyond the outer surfaces of the magnetic yoke 21 and the magnetic circuit assembly 22. This arrangement ensures that the metal connector 4 does not protrude from the outer surface of the sound-generating device 100, thereby improving the aesthetics while preventing the metal connector 4 from interfering with or affecting other structures. In this embodiment, the side of the metal connector 4 facing away from the welding groove 24 is flush with the outer walls of the magnetic yoke 21 and the magnetic circuit assembly 22.

[0040] To further improve the installation stability and reliability of the magnetic circuit system 2 of the sound-generating device 100, in one embodiment, the metal connector 4 is welded to the housing 1 at one end away from the magnetic yoke 21. It will be appreciated that the housing 1 may be a metal shell or at least partially made of metal. In this manner, the metal connector 4 is simultaneously welded to the magnetic yoke 21, the magnetic circuit assembly 22, and the housing 1 of the magnetic circuit system 2. This allows the metal connector 4 to weld and secure the magnetic yoke 21, the magnetic circuit assembly 22, and the housing 1 together, thereby further improving the reliability of the magnetic circuit system 2.

[0041] In one embodiment, the housing 1 is provided with a recessed groove 1213 corresponding to the welding groove 24 , and one end of the metal connector 4 away from the magnetic yoke 21 extends into the recessed groove 1213 and is welded to the housing 1 .

[0042] In this embodiment, if Figure 3 and Figure 4 、 Figure 6 As shown, by providing a recessed groove 1213 on the housing 1 corresponding to the welding groove 24, the end of the metal connector 4 away from the magnetic yoke 21 extends into the recessed groove 1213 and is welded to the housing 1. It should be noted that the recessed groove 1213 extends along the second direction. This not only connects the metal connector 4 to the housing 1, but also allows the housing 1, magnetic circuit assembly 22, and magnetic yoke 21 to be welded together as a whole through the metal connector 4, further enhancing the structural stability of the magnetic circuit system 2.

[0043] Optionally, the surface of the metal connector 4 facing away from the recessed groove 1213 does not extend beyond the outer wall of the housing 1. This ensures that the metal connector 4 does not protrude from the outer surface of the sound-emitting device 100, thereby improving the aesthetics while preventing the metal connector 4 from interfering with or affecting other structures. In this embodiment, the side of the metal connector 4 facing away from the recessed groove 1213 is flush with the outer wall of the housing 1.

[0044] In one embodiment, each magnetic circuit assembly 22 includes 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, and the second magnet 224 is connected to the magnetic conductive yoke 21; wherein the metal connecting member 4 is welded to the first magnetic conductive plate 221, the second magnetic conductive plate 223 and the magnetic conductive yoke 21.

[0045] In this embodiment, if Figures 1 to 8As shown, the second magnet 224 of each magnetic circuit component 22 is connected to one side of the magnetic yoke 21, the second magnetic 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 plate 221 and the second magnetic plate 223, so that the first magnetic plate 221, the first magnet 222, the second magnetic 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.

[0046] Alternatively, as Figure 7 and Figure 8 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.

[0047] 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 311 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 311 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.

[0048] Optionally, the housing 1 is a metal shell or at least partially metal, and the housing 1 is welded to the first magnetic conductive plate 221. This further improves the connection stability between the magnetic circuit system 2 and the housing 1. Of course, in other embodiments, the housing 1 and the first magnetic conductive plate 221 may also be bonded, which is not limited here.

[0049] In this embodiment, the first magnetic plate 221, the first magnet 222, the second magnetic plate 223, the second magnet 224 and the magnetic yoke 21 of the magnetic circuit assembly 22 are all provided with grooves on the side facing away from the voice coil 32, and are connected in sequence along the second direction to form a welding groove 24. This makes it convenient to place the metal connecting member 4 in the welding groove 24, and the metal connecting member 4 is welded and connected to the first magnetic plate 221, the second magnetic plate 223 and the magnetic yoke 21 respectively.

[0050] In one embodiment, the metal connector 4 is provided with welding identification lines 41 corresponding to the first magnetic conductive plate 221 , the second magnetic conductive plate 223 and the magnetic conductive yoke 21 .

[0051] In this embodiment, if Figures 1 to 3 As shown, by providing a welding identification line 41 on the metal connector 4, it is convenient to position the metal connector 4 when welding with the first magnetic conductive plate 221, the second magnetic conductive plate 223 and the magnetic conductive yoke 21, thereby improving welding efficiency.

[0052] Optionally, the lower end surface of the metal connector 4 does not extend beyond the surface of the magnetic yoke 21 on the side facing away from the magnetic circuit assembly 22. In this embodiment, the lower end surface of the metal connector 4 is flush with the surface of the magnetic yoke 21 on the side facing away from the magnetic circuit assembly 22. In one embodiment, the upper end surface of the metal connector 4 does not extend beyond the surface of the first magnetic plate 221 on the side facing away from the first magnet 222. Optionally, the upper end surface of the metal connector 4 is flush with the surface of the first magnetic plate 221 on the side facing away from the first magnet 222. Of course, in other embodiments, the upper end of the metal connector 4 may also protrude beyond the first magnetic plate 221 and be welded to the housing 1, which is not limited here.

[0053] In order to further improve the connection stability and positioning assembly effect between the metal connector 4 and the magnetic circuit system 2, in one embodiment, the metal connector 4 is provided with a first through hole corresponding to the first magnetic conductive plate 221, and the outer wall of the first magnetic conductive plate 221 is provided with a first protrusion, which is passed through the first through hole and is welded to the metal connector 4.

[0054] Of course, in one embodiment, if Figure 6 and Figure 8 As shown, the metal connector 4 is provided with a second through hole 42 corresponding to the second magnetic conductive plate 223 , and a second protrusion 2231 is protruded from the outer wall of the second magnetic conductive plate 223 . The second protrusion 2231 is passed through the second through hole 42 and is welded to the metal connector 4 .

[0055] It should be noted that the metal connector 4 can be provided with a first through hole and a second through hole 42 corresponding to the first magnetic conductive plate 221 and the second magnetic conductive plate 223 respectively. At this time, the outer wall of the first magnetic conductive plate 221 is provided with a first protrusion, and the outer wall of the second magnetic conductive plate 223 is provided with a second protrusion 2231. The first protrusion is passed through the first through hole and is welded to the metal connector 4. The second protrusion 2231 is passed through the second through hole 42 and is welded to the metal connector 4. No limitation is made here.

[0056] 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. Figures 3 to 6 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] In this embodiment, if Figures 3 to 8 As 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.

[0061] 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.

[0062] In this embodiment, if Figure 1 、 Figures 3 to 6 、 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.

[0063] 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.

[0064] In this embodiment, if Figures 1 to 6 、 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.

[0065] 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.

[0066] 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.

[0067] In this embodiment, if Figures 1 to 6 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 .

[0068] 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.

[0069] 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.

[0070] 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 side of the magnetic circuit assembly 22 away from the magnetic yoke 21 is connected to the annular body 121, 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.

[0071] 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 side of the magnetic circuit component 22 away from the magnetic yoke 21 is connected to the annular body 121 . The side wall 122 has a receiving hole 1221 , and the magnetic circuit component 22 extends to the receiving hole 1221 .

[0072] It is understandable that by providing the receiving hole 1221 on the side wall 122, each magnetic circuit assembly 22 can extend into the receiving hole 1221 and form an extension portion, thereby increasing the volume of each magnetic circuit assembly 22, improving the magnetic field strength, and further improving the acoustic performance of the sound-generating device 100. It should be noted that the outer surface of the extension portion of the magnetic circuit assembly 22 does not exceed the outer surface of the side wall 122. Optionally, the outer surface of the extension portion 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] In one embodiment, the vibration system 3 further includes two centering supports 34 , and the centering supports 34 are distributed at both ends of the voice coil 32 corresponding to the skeleton 33 .

[0077] Optionally, 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.

[0078] In this embodiment, if Figures 1 to 6 、 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.

[0079] 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.

[0080] 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 .

[0081] 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 frame 33 and has an inner solder pad electrically connected to the lead of the voice coil 32 .

[0082] In this embodiment, if Figures 1 to 6 、 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 third connecting portion 333 of 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.

[0083] 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.

[0084] Optionally, the outer solder pad 3411 and the centering support 34 are integrally formed, thereby reducing the number of structural components and facilitating assembly of the sound-generating device 100. Furthermore, the skeleton 33 is connected to the inner fixing portion 342, that is, the skeleton 33 simultaneously connects the vibration plate 312, the voice coil 32, and the centering support 34. This improves the vibration consistency of the vibration system 3, enhances the responsiveness of the sound-generating device 100, reduces distortion, and further optimizes the acoustic performance of the sound-generating device 100.

[0085] In one embodiment, the housing 1 has an escape opening 1222 corresponding to each external fixing portion 341 . Each external fixing portion 341 passes through the escape opening 1222 and has an external solder pad 3411 . The magnetic yoke 21 bends and extends toward the external fixing portion 341 corresponding to each escape opening 1222 to form a positioning protrusion 211 .

[0086] In this embodiment, if Figures 1 to 3 As shown, the outer fixing portion 341 of the centering support 34 is at least partially located outside the housing 1, facilitating electrical connection between the outer solder pad 3411 and the external circuit. By providing a clearance opening 1222 on the housing 1, the outer fixing portion 341 of the centering support 34 extends toward the outside of the housing 1.

[0087] It is understandable that in order to cover the avoidance openings 1222 , the magnetic yoke 21 bends and extends toward the outer fixing portion 341 corresponding to each avoidance opening 1222 to form a positioning protrusion 211 , that is, the outer fixing portion 341 is located between the positioning protrusion 211 and the avoidance openings 1222 of the housing 1 .

[0088] In this embodiment, the centering support 34 not only provides a restraining force to restrain the voice coil 32 from vibrating along the vibration direction, but also introduces the external circuit current into the voice coil 32, thereby simplifying the number of structural components of the sound-generating device 100, simplifying the assembly process, and improving assembly efficiency.

[0089] The present invention further provides an electronic device comprising the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and thus will not be described in detail here.

[0090] Optionally, the electronic device of the present invention may be a portable mobile electronic product such as a mobile phone or a tablet, or a wearable device such as a watch, VR, AR, etc., which is not specifically limited here.

[0091] 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, the magnetic circuit system comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, the two magnetic circuit components being spaced apart along a first direction and forming a magnetic gap therebetween; 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 in a second direction, the second direction being perpendicular to the first direction; and A metal connector is welded to the magnetic yoke and the magnetic circuit assembly.

2. The sound-generating device according to claim 1, wherein: The outer wall of the magnetic circuit system is provided with a welding groove, the metal connecting piece is accommodated in the welding groove, and is welded to the magnetic yoke and the magnetic circuit assembly.

3. The sound-generating device according to claim 2, wherein: The housing is provided with a recessed groove corresponding to the welding groove, and one end of the metal connector away from the magnetic yoke extends into the recessed groove and is welded to the housing; And / or, the surface of the metal connector facing away from the welding groove does not exceed the outer surfaces of the magnetic yoke and the magnetic circuit assembly; And / or, the metal connecting parts include multiple ones, and each side of the magnetic circuit component facing away from the voice coil is welded to at least one of the metal connecting parts; or, the metal connecting part includes one, and the metal connecting part is located in the middle position of the side of the magnetic circuit component facing away from the voice coil.

4. The sound-generating device according to claim 1, wherein: Each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate, and a second magnet stacked in sequence along the second direction, wherein the second magnet is connected to the magnetic conductive yoke; Wherein, the metal connecting member is welded to the first magnetic conductive plate, the second magnetic conductive plate and the magnetic conductive yoke.

5. The sound-generating device according to claim 4, wherein: The metal connector is provided with a first through hole corresponding to the first magnetic conductive plate, and a first protrusion is provided on the outer wall of the first magnetic conductive plate. The first protrusion is inserted into the first through hole and is welded to the metal connector; And / or, the metal connector is provided with a second through hole corresponding to the second magnetic conductive plate, the outer wall of the second magnetic conductive plate is provided with a second protrusion, the second protrusion is passed through the second through hole, and is welded to the metal connector.

6. The sound-generating device according to claim 4, wherein: 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; And / or, the metal connectors are provided with welding identification lines corresponding to the first magnetic conductive plate, the second magnetic conductive plate and the magnetic conductive yoke respectively; And / or, the shell is connected to the first magnetic conductive plate by welding or bonding.

7. The sound-generating device according to claim 4, 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.

8. The sound generating device according to any one of claims 1 to 7, 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.

9. The sound-generating device according to claim 8, wherein: The bottom shell includes an annular body and a side wall connected to the annular body, the side of the magnetic circuit assembly away from the magnetic yoke is connected to the annular body, and the side wall is welded to the magnetic yoke; And / or, the bottom shell includes an annular body and a side wall connected to the annular body, the side of the magnetic circuit component away from the magnetic yoke is connected to the annular body, the side wall has a receiving hole, and the magnetic circuit component extends to the receiving hole; And / or, the bottom shell is a metal shell, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate, and a second magnet stacked in sequence along the second direction, the second magnet is connected to the magnetic conductive yoke, 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.

10. The sound generating device according to claim 8, wherein: The vibration system further includes a frame and a centering support plate, wherein the frame includes two frames and is respectively provided at both ends of the voice coil along a third direction, the frame connecting the voice coil and the vibration plate, and the third direction is perpendicular to the first direction and the second direction respectively; There are two centering supports, which are distributed at both ends of the voice coil corresponding to the frame. Each centering support includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion. Each inner fixing portion is connected to one of the frames and has 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.

11. An electronic device, characterized in that: The electronic device includes the sound emitting device according to any one of claims 1 to 10.

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