Sound production device and electronic device

Abstract

The utility model discloses a sound production device and electronic equipment relate to electric sound transduction technical field, the sound production device includes shell, magnetic circuit system, vibration system and metal connecting piece, and the magnetic circuit system is connected with the shell, and the magnetic circuit system includes magnetic yoke and two magnetic circuit components arranged at one side of magnetic yoke, and two magnetic circuit components are arranged along the first direction interval and form the magnetic gap between, and the vibration system includes diaphragm component and the voice coil connected in diaphragm component, and the circumference of diaphragm component is connected with the shell, and the axial direction of voice coil is along the first direction, and is inserted in the magnetic gap, and voice coil drives diaphragm component to vibrate along the second direction, and the second direction is perpendicular to the first direction, and the metal connecting piece is welded with magnetic yoke and magnetic circuit component and is connected. The utility model aims at improving the installation stability of magnetic circuit system in sound production device, avoids the magnetic circuit component of magnetic circuit system and falls off and fails to occur etc.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Technology

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

[0003] In related technologies, the magnetic circuit system of a sound-generating device is usually fixed by adhesive. When the adhesive fails due to external environmental factors, the adhesive strength weakens or disappears, leading to problems such as the magnets in the magnetic circuit system falling off and failing. Utility Model Content

[0004] The main purpose of this invention is to provide a sound-generating device and electronic device, which aims to improve the installation stability of the magnetic circuit system in the sound-generating device and avoid problems such as the detachment and failure of the magnetic circuit components.

[0005] To achieve the above objectives, this utility model proposes a sound-generating device, wherein the aspect ratio of the sound-generating device is greater than or equal to 2:1, and the sound-generating device comprises:

[0006] shell;

[0007] A magnetic circuit system connected to the housing, the magnetic circuit system including a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, the two magnetic circuit components being arranged at intervals along a first direction and forming a magnetic gap between them;

[0008] A vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, the periphery of the diaphragm assembly being connected to the housing, the voice coil having an axial direction along a first direction and being inserted into the magnetic gap, the voice coil driving the diaphragm assembly to vibrate along a second direction, the second direction being perpendicular to the first direction; and

[0009] A metal connector is welded to the magnetic yoke and the magnetic circuit assembly.

[0010] In one embodiment, the outer wall of the magnetic circuit system is provided with a welding groove, the metal connector is housed in the welding groove, and is welded to the magnetic yoke and the magnetic circuit assembly.

[0011] In one embodiment, the outer casing has a recessed groove corresponding to the welding groove, and the end of the metal connector away from the magnetic yoke extends into the recessed groove and is welded to the outer casing;

[0012] And / or, the surface of the metal connector facing away from the welding groove does not extend beyond the outer surface of the magnetic yoke and the magnetic circuit assembly;

[0013] And / or, the metal connectors include multiple components, and each magnetic circuit assembly is welded to at least one metal connector on the side facing away from the voice coil; or, the metal connector includes one component, which is located at the middle position on the side of the magnetic circuit assembly facing away from the voice coil.

[0014] In one embodiment, each of the magnetic circuit components includes a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked sequentially along the second direction, wherein the second magnet is connected to the magnetic yoke;

[0015] The metal connector is welded to the first magnetic plate, the second magnetic plate, and the magnetic yoke.

[0016] In one embodiment, the metal connector has a first through hole corresponding to the first magnetic plate, and the outer wall of the first magnetic plate has a first protrusion, which passes through the first through hole and is welded to the metal connector.

[0017] And / or, the metal connector has a second through hole corresponding to the second magnetic plate, the outer wall of the second magnetic plate has a second protrusion, the second protrusion passes through the second through hole and is welded to the metal connector.

[0018] 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 two first magnets and two second magnets opposite to each other along the first direction are in opposite directions;

[0019] And / or, the metal connectors are respectively provided with welding marking lines corresponding to the first magnetic plate, the second magnetic plate and the magnetic yoke;

[0020] And / or, the outer casing is welded or bonded to the first magnetic plate.

[0021] In one embodiment, a limiting portion is provided on the inner wall of the outer shell, and the limiting portion is connected to the first magnetic plate;

[0022] Wherein, the side of the first magnetic plate near the magnetic gap protrudes along the second direction toward the direction away from the first magnet to form a protrusion, the protrusion and the first magnetic plate cooperate to form a limiting groove, the limiting part is limited in the limiting groove and abuts against the protrusion;

[0023] And / or, the limiting part is provided with an avoidance groove corresponding to the folded ring part of the diaphragm assembly.

[0024] In one embodiment, the diaphragm assembly includes a diaphragm and a resonant plate connected to the diaphragm, the resonant plate being connected to the voice coil;

[0025] The outer shell includes a connected annular support and a bottom shell. The periphery of the diaphragm is bonded to the inner peripheral wall of the annular support, and the diaphragm and the annular support are integrally thermo-pressed or injection-molded. The bottom shell is connected to the magnetic circuit system.

[0026] In one embodiment, the bottom shell includes an annular body and a sidewall connected to the annular body, the magnetic circuit assembly is connected to the annular body on the side away from the magnetic yoke, and the sidewall is welded to the magnetic yoke;

[0027] And / or, the bottom shell includes an annular body and a sidewall connected to the annular body, the magnetic circuit assembly is connected to the annular body on the side away from the magnetic yoke, the sidewall has a receiving hole, and the magnetic circuit assembly extends to the receiving hole;

[0028] And / or, the bottom shell is a metal shell, and each magnetic circuit assembly includes a first magnetic guide plate, a first magnet, a second magnetic guide plate and a second magnet stacked sequentially along the second direction, the second magnet is connected to the magnetic guide yoke, and the bottom shell is welded to the first magnetic guide plate;

[0029] And / or, the diaphragm is provided with reinforcing ribs that extend inward toward the side closer to the voice coil.

[0030] In one embodiment, the vibration system further includes a frame and a centering support. The frame includes two parts, which are respectively disposed at both ends of the voice coil along a third direction. The frame connects the voice coil and the resonating plate. The third direction is perpendicular to the first direction and the second direction, respectively.

[0031] The centering support is two in number and is distributed at both ends of the voice coil corresponding to the skeleton. Each centering support includes an outer fixing part, an inner fixing part, and an elastic arm connecting the outer fixing part and the inner fixing part. Each inner fixing part is connected to a skeleton and is provided with an inner solder pad that is electrically connected to the lead wire of the voice coil.

[0032] The outer shell has a clearance opening for each of the outer fixing parts, each of the outer fixing parts passes through the clearance opening and has an outer solder pad, and the magnetic yoke bends and extends toward the outer fixing part to form a positioning protrusion for each of the clearance openings.

[0033] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0034] The sound-generating device of this utility model connects a magnetic circuit system and a vibration system to a housing, thereby achieving the installation and fixation of the magnetic circuit system and the vibration system. The magnetic circuit system is configured as a magnetic yoke and two magnetic circuit components located on one side of the magnetic yoke, such that the two magnetic circuit components are arranged at intervals along a first direction and form a magnetic gap between them. The vibration system is configured as a diaphragm assembly and a voice coil connected to the diaphragm assembly, such that the voice coil is located in the magnetic gap of the magnetic circuit system. In this way, when energized, the voice coil can vibrate in the magnetic gap under the drive of the magnetic circuit system, thereby driving the diaphragm assembly to vibrate and generate sound, thus enabling the sound-generating device to have a sound-generating function; at the same time, by moving the axial direction of the voice coil along the first direction... The orientation of the voice coil results in a flattened shape, making the structure of this sound-generating device more compact and requiring less assembly space compared to a sound-generating device with a ring voice coil and a ring magnetic gap. Furthermore, by incorporating metal connectors, the metal connectors are welded to the magnetic yoke and magnetic circuit components of the magnetic circuit system. This further connects the magnetic yoke and magnetic circuit components of the magnetic circuit system into a whole, improving connection stability. In this way, the metal connectors can both counteract the attraction between the magnetic circuit components of the magnetic circuit system and prevent the magnetic circuit components from detaching and failing when the adhesive strength of the magnetic circuit system weakens or disappears. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model;

[0037] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model from another perspective;

[0038] Figure 3 A partially exploded schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0039] Figure 4 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0040] Figure 5 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by this utility model;

[0041] Figure 6 A cross-sectional schematic diagram of yet another embodiment of the sound-generating device provided by this utility model;

[0042] Figure 7 A cross-sectional schematic diagram of an embodiment of the magnetic circuit system provided by this utility model;

[0043] Figure 8 A cross-sectional schematic diagram of another embodiment of the magnetic circuit system provided by this utility model;

[0044] Figure 9 A cross-sectional schematic diagram of the connection between the diaphragm assembly and the ring bracket in one embodiment of the sound-generating device provided by this utility model;

[0045] Figure 10 A schematic diagram of the connection between the voice coil, frame, and centering support in one embodiment of the sound-generating device provided by this utility model.

[0046] Explanation of icon numbers:

[0047] 100. Sound-generating device; 1. Outer shell; 11. Ring-shaped bracket; 12. Bottom shell; 121. Ring-shaped main body; 1211. Limiting part; 1212. Clearance groove; 1213. Recessed groove; 122. Side wall; 1221. Receiving hole; 1222. Clearance opening; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Positioning protrusion; 22. Magnetic circuit assembly; 221. First magnetic plate; 2211. Protrusion; 2212. Limiting groove; 222. First magnet; 223. Second magnetic plate; 2231. Second 224. Protrusion; 23. Second magnet; 24. Magnetic gap; 3. Welding groove; 3. Vibration system; 31. Diaphragm assembly; 311. Diaphragm; 312. Vibrating plate; 3121. Reinforcing rib; 32. Voice coil; 33. Frame; 331. First connecting part; 332. Second connecting part; 333. Third connecting part; 34. Centering support; 341. External fixing part; 3411. External welding pad; 342. Internal fixing part; 343. Elastic arm; 4. Metal connector; 41. Welding marking line; 42. Second through hole.

[0048] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0052] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0053] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained consumer acceptance and widespread application. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used as speakers, earpieces, and headphones. As the performance of electronic products improves, the improvement of the acoustic performance of sound-generating devices is an inevitable trend.

[0054] In related technologies, the magnetic circuit system of a sound-generating device is typically fixed using adhesive. While adhesive can remain strong for a long time at room temperature, it rapidly deteriorates in high-temperature, high-humidity, or acidic / alkaline environments, leading to bonding failure. When the adhesive fails due to external environmental factors, its bonding strength weakens or disappears, causing the magnets in the magnetic circuit system to detach and fail. Simultaneously, the magnetic circuit system provides the driving force for the voice coil's vibration, and the magnets within the system exhibit static magnetic forces of attraction or repulsion, which accelerate the detachment and failure of the magnets.

[0055] Based on the above concept and problems, this utility model proposes a sound-generating device 100, which is applied in electronic devices. It is understood that the electronic device can be a mobile phone, headphones, smart wearable devices, smart glasses, etc., and is not limited thereto.

[0056] In this embodiment, the sound-generating device 100 provides 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 and fixing of the metal connector 4.

[0057] Please refer to the reference. Figures 1 to 10 As shown in the embodiment of this utility model, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2, a vibration system 3, and a metal connector 4. 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 disposed 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 between them. 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 housing 1. 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 assembly 31 to vibrate along a second direction, which is perpendicular to the first direction. The metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit components 22.

[0058] In this embodiment, the sound-generating device 100 can be a single loudspeaker unit, and the sound-generating device 100 can be applied in an electronic device, such as a computer, mobile phone, or smart wearable device. This embodiment uses a single loudspeaker unit as an example for illustration.

[0059] Understandable, such as Figures 1 to 3 As shown, the sound-generating device 100 has a narrow and elongated shape. It should be noted that the sound-generating device 100 has a major axis direction, a minor axis direction, and a height (thickness) along the vibration direction. The minor axis direction of the sound-generating device 100 is defined as the first direction, the vibration direction of the sound-generating device 100 (that is, the height (thickness) direction of the sound-generating device 100) is defined as the second direction, and the major axis direction of the sound-generating device 100 is defined as the third direction. The vibration direction, the minor axis direction, and the major axis direction are perpendicular to each other, that is, the first direction, the second direction, and the third direction are perpendicular to each other.

[0060] In this embodiment, the length-to-width ratio of the sound-generating device 100 is greater than or equal to 2:1, which better adapts it to the reserved space of microelectronic devices, such as smart wearable devices (e.g., smartwatches). It is understood 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, thus causing the voice coil 32 to drive the diaphragm assembly 31 to vibrate along a second direction, i.e., the vibration system 3 vibrates along the second direction. By setting the voice coil 32 to a flat shape, compared to a sound-generating device with a ring voice coil and a ring magnetic gap, the voice coil 32 of this invention, when applied to the sound-generating device 100, makes the structure of the sound-generating device 100 more compact and occupies less assembly space.

[0061] Understandable, such as Figures 3 to 8 As shown, two magnetic circuit components 22 of the magnetic circuit system 2 are arranged at intervals along a first direction on one side of the magnetic yoke 21, and a magnetic gap 23 is formed between the two magnetic circuit components 22. The voice coil 32 is inserted into the magnetic gap 23 on the side away from the diaphragm assembly 31. In this way, the voice coil 32 can vibrate under the drive of the magnetic circuit system 2 when energized, thereby driving the diaphragm assembly 31 connected to the voice coil 32 to vibrate and produce sound, thus enabling the sound-producing device 100 to have a sound-producing function. At the same time, by setting the voice coil 32 to a flat shape, compared with the sound-producing device with a ring voice coil and a ring magnetic gap, the structure of the sound-producing device 100 of this utility model is more compact and occupies less assembly space.

[0062] In this embodiment, by providing a metal connector 4, the metal connector 4 is welded to the magnetic yoke 21 and the magnetic circuit assembly 22. In this way, the metal connector 4 further strengthens 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 into 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 not only offset the attraction between the magnetic circuit assemblies 22 of the magnetic circuit system 2, but also prevent the magnetic circuit assemblies 22 of the magnetic circuit system 2 from falling off and failing when the adhesive bonding force of the magnetic circuit system 2 weakens or disappears.

[0063] Optionally, multiple metal connectors 4 are included, and each magnetic circuit assembly 22 is welded to at least one metal connector 4 on the side facing away from the voice coil 32; this is not limited. This further improves the structural stability of the magnetic circuit system 2. It is understood that the multiple metal connectors 4 are spaced apart along a third direction. In this embodiment, as... Figures 1 to 3 As shown, the metal connector 4 includes one piece. Optionally, the metal connector 4 is located at the middle position on the side of the magnetic circuit assembly 22 facing away from the voice coil 32, which is not limited here.

[0064] The sound-generating device 100 of this utility model connects the magnetic circuit system 2 and the vibration system 3 to the outer shell 1, thereby realizing the installation and fixation of the magnetic circuit system 2 and the vibration system 3. The magnetic circuit system 2 is configured as a magnetic yoke 21 and two magnetic circuit components 22 located on one side of the magnetic yoke 21, such that the two magnetic circuit components 22 are arranged at intervals along a first direction and form a magnetic gap 23 between them. The vibration system 3 is configured as a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31, such that the voice coil 32 is located in the magnetic gap 23 of the magnetic circuit system 2. In this way, when energized, the voice coil 32 can vibrate in the magnetic gap 23 under the drive of the magnetic circuit system 2, thereby driving the diaphragm assembly 31 to vibrate and generate sound, thus enabling the sound-generating device 100 to have a sound-generating function; at the same time, by using the voice coil 32 The axial direction is along the first direction, making the voice coil 32 flat. Compared with the sound-generating device with an annular voice coil and an annular magnetic gap, the structure of the sound-generating device 100 of this utility model is more compact and occupies less assembly space. Furthermore, by setting the metal connector 4, the metal connector 4 is welded to the magnetic yoke 21 and magnetic circuit component 22 of the magnetic circuit system 2. Thus, the metal connector 4 further connects the magnetic yoke 21 and magnetic circuit component 22 of the magnetic circuit system 2 into a whole, improving the connection stability. In this way, the metal connector 4 can not only counteract the attraction between the magnetic circuit components 22 of the magnetic circuit system 2, but also prevent the magnetic circuit components 22 of the magnetic circuit system 2 from falling off and failing when the adhesive bonding force of the magnetic circuit system 2 weakens or disappears.

[0065] In one embodiment, the outer wall of the magnetic circuit system 2 is provided with a welding groove 24, and the metal connector 4 is housed in the welding groove 24 and welded to the magnetic yoke 21 and the magnetic circuit assembly 22.

[0066] In this embodiment, as 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 provides a space for the metal connector 4, which can not only enable the positioning and installation of the metal connector 4, but also further enhance the structural stability of the magnetic circuit system 2.

[0067] 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 aesthetics and 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.

[0068] To further improve the installation stability and reliability of the magnetic circuit system 2 of the sound-generating device 100, in one embodiment, the end of the metal connector 4 away from the magnetic yoke 21 is welded to the outer casing 1. It is understood that the outer casing 1 may be a metal shell or at least partially made of metal. Thus, by simultaneously welding the metal connector 4 to the magnetic yoke 21, the magnetic circuit assembly 22, and the outer casing 1 of the magnetic circuit system 2, the metal connector 4 welds and fixes the magnetic yoke 21, the magnetic circuit assembly 22, and the outer casing 1 together, thereby further improving the reliability of the magnetic circuit system 2.

[0069] In one embodiment, the outer shell 1 is provided with a recessed groove 1213 corresponding to the welding groove 24, and the end of the metal connector 4 away from the magnetic yoke 21 extends into the recessed groove 1213 and is welded to the outer shell 1.

[0070] In this embodiment, as Figure 3 and Figure 4 , Figure 6 As shown, a recessed groove 1213 is provided on the outer shell 1 corresponding to the welding groove 24, allowing the end of the metal connector 4 away from the magnetic yoke 21 to extend into the recessed groove 1213 and be welded to the outer shell 1. It should be noted that the recessed groove 1213 extends along the second direction. This allows the metal connector 4 to connect to the outer shell 1, and also allows the outer shell 1, the magnetic circuit assembly 22, and the magnetic yoke 21 to be welded into a single unit via the metal connector 4, further enhancing the structural stability of the magnetic circuit system 2.

[0071] 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-generating device 100, thereby improving aesthetics and 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.

[0072] In one embodiment, each magnetic circuit assembly 22 includes a first magnetic plate 221, a first magnet 222, a second magnetic plate 223 and a second magnet 224 stacked sequentially along a second direction, with the second magnet 224 connected to the magnetic yoke 21; wherein, the metal connector 4 is welded to the first magnetic plate 221, the second magnetic plate 223 and the magnetic yoke 21.

[0073] In this embodiment, as Figures 1 to 8As shown, the second magnet 224 of each magnetic circuit assembly 22 is connected to one side of the magnetic yoke 21, and the second magnetic plate 223 is sandwiched between the first magnet 222 and the second magnet 224. The first magnet 222 is sandwiched 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 assemblies 22 correspond one-to-one along the first direction and are spaced apart to form a magnetic gap 23.

[0074] Optionally, such 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 the magnetization directions are opposite. The magnetization directions of the two first magnets 222 and the two second magnets 224 that are opposite to each other along the first direction are also opposite.

[0075] Understandably, a first magnetic gap is formed between the two first magnetic plates 221, and the long side of the voice coil 32 on the side closer to the diaphragm 311 is located in the first magnetic gap. A second magnetic gap is formed between the two second magnetic plates 223, and the long side of the voice coil 32 on the side farther 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 a greater driving force.

[0076] Optionally, the outer casing 1 is a metal casing or at least partially made of metal, and the outer casing 1 is welded to the first magnetic conductive plate 221. This can further improve the connection stability between the magnetic circuit system 2 and the outer casing 1. Of course, in other embodiments, the outer casing 1 and the first magnetic conductive plate 221 can also be bonded together, which is not limited here.

[0077] 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 sequentially connected along the second direction to form a welding groove 24. This facilitates the placement of the metal connector 4 in the welding groove 24, and allows the metal connector 4 to be welded to the first magnetic plate 221, the second magnetic plate 223, and the magnetic yoke 21 respectively.

[0078] In one embodiment, the metal connector 4 is provided with welding marking lines 41 corresponding to the first magnetic plate 221, the second magnetic plate 223 and the magnetic yoke 21 respectively.

[0079] In this embodiment, as Figures 1 to 3 As shown, by setting welding marking lines 41 on the metal connector 4, it is convenient to position the metal connector 4 when welding with the first magnetic plate 221, the second magnetic plate 223 and the magnetic yoke 21, thereby improving welding efficiency.

[0080] Optionally, the lower end face of the metal connector 4 does not extend beyond the surface of the magnetic yoke 21 facing away from the magnetic circuit assembly 22. In this embodiment, the lower end face of the metal connector 4 is flush with the surface of the magnetic yoke 21 facing away from the magnetic circuit assembly 22. In one embodiment, the upper end face of the metal connector 4 does not extend beyond the surface of the first magnetic plate 221 facing away from the first magnet 222. Optionally, the upper end face of the metal connector 4 is flush with the surface of the first magnetic plate 221 facing away from the first magnet 222. Of course, in other embodiments, the upper end of the metal connector 4 may also protrude from the first magnetic plate 221 and be welded to the outer casing 1, which is not limited here.

[0081] 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 guide plate 221, and the outer wall of the first magnetic guide plate 221 is provided with a first protrusion, which passes through the first through hole and is welded to the metal connector 4.

[0082] Of course, in one implementation, such as Figure 6 and Figure 8 As shown, the metal connector 4 is provided with a second through hole 42 corresponding to the second magnetic plate 223. The outer wall of the second magnetic plate 223 is provided with a second protrusion 2231. The second protrusion 2231 passes through the second through hole 42 and is welded to the metal connector 4.

[0083] It should be noted that the metal connector 4 may have a first through hole and a second through hole 42 corresponding to the first magnetic plate 221 and the second magnetic plate 223, respectively. In this case, the outer wall of the first magnetic plate 221 is provided with a first protrusion, and the outer wall of the second magnetic plate 223 is provided with a second protrusion 2231. The first protrusion passes through the first through hole and is welded to the metal connector 4, and the second protrusion 2231 passes through the second through hole 42 and is welded to the metal connector 4. This is not limited here.

[0084] To further improve the connection stability between the outer casing 1 and the magnetic circuit system 2, in one embodiment, such as Figures 3 to 6 As shown, a limiting portion 1211 protrudes from the inner wall of the outer casing 1, and the limiting portion 1211 is connected to the first magnetic plate 221. It is understood that the limiting portion 1211 extends along the plane containing the first direction; optionally, the limiting portion 1211 is annular. The limiting portion 1211 is connected to the side of the first magnetic plate 221 facing away from the first magnet 222. Optionally, the limiting portion 1211 is welded or bonded to the first magnetic plate 221; this is not limited here.

[0085] Optionally, the limiting part 1211 is arranged in a ring along the inside of the outer shell 1. The limiting part 1211 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage and thus achieving a high waterproof target.

[0086] Understandably, in order to ensure that the diaphragm assembly 31 has sufficient vibration space, the limiting part 1211 may optionally provide a clearance groove 1212 corresponding to the folded ring part of the diaphragm assembly 31. In this way, the clearance groove 1212 can be used to provide vibration and clearance space for the diaphragm assembly 31 during vibration.

[0087] In one embodiment, the side of the first magnetic plate 221 near the magnetic gap 23 protrudes in the second direction away from the first magnet 222 to form a protrusion 2211. The protrusion 2211 cooperates with the first magnetic plate 221 to form a limiting groove 2212. The limiting part 1211 is limited in the limiting groove 2212 and abuts against the protrusion 2211.

[0088] In this embodiment, as Figures 3 to 8 As shown, by providing a protrusion 2211 on the side of the first magnetic plate 221 near the magnetic gap 23, the first magnetic plate 221 increases the magnetic field line density passing through the voice coil 32 through the protrusion 2211, thereby increasing the magnetic induction intensity and further expanding the magnetic field region 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.

[0089] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibrating plate 312 connected to the diaphragm 311, the vibrating plate 312 being connected to the voice coil 32; the outer shell 1 includes an annular support 11 and a bottom shell 12 connected to each other, the periphery of the diaphragm 311 being joined to the inner peripheral wall of the annular support 11, and the diaphragm 311 and the annular support 11 being integrally thermo-pressed or injection-molded, and the bottom shell 12 being connected to the magnetic circuit system 2.

[0090] In this embodiment, as Figure 1 , Figures 3 to 6 , Figure 9 As shown, the diaphragm 311 may optionally be arranged in a ring shape, and the diaphragm 312 is disposed in the central region of the diaphragm 311. Optionally, the diaphragm 312 is provided with reinforcing ribs 3121 extending recessed towards the side near the voice coil 32. In this way, the reinforcing ribs 3121 can be used to enhance the structural strength of the diaphragm 3122. It is understood that there may be one or more reinforcing ribs 3121, and the one or more reinforcing ribs 3121 may be arranged along a first direction or a third direction, which is not limited here.

[0091] Optionally, the vibrating plate 312 is formed by hot pressing or injection molding using one of the following materials: magnesium-aluminum alloy, aluminum, polyethylene naphthalate, polyethylene terephthalate, liquid crystal polymer, or polyetherimide. Optionally, the diaphragm 311 can be formed by hot pressing or injection molding using one of the following materials: silicone rubber, AEM rubber, or ACM rubber. In this embodiment, the prepared vibrating plate 312 is placed as an insert in the mold, and then the diaphragm 311 is formed, thus forming an integral structure of the vibrating plate 312 and the diaphragm 311.

[0092] In this embodiment, as Figures 1 to 6 , Figure 9 As shown, the housing 1 includes an annular support 11, and the diaphragm 311 is attached to the inner peripheral 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 it can be integrally formed with the diaphragm 311 of the vibration system 3 through injection molding.

[0093] Understandably, the annular support 11 is placed as an insert in the mold, and then the diaphragm raw material is injected 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 the connection between the two, that is, the diaphragm 311 is combined with the inner peripheral wall of the annular support 11. Alternatively, the diaphragm 311 can be integrally formed with the annular support 11 through a hot pressing process.

[0094] 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 devices.

[0095] In this embodiment, as Figures 1 to 6 As shown, the housing 1 also includes a bottom shell 12, which has an annular frame structure and is attached to the side of the annular support 11 facing the magnetic circuit system 2 by adhesive bonding or inlay. The magnetic circuit system 2 is connected inside the bottom shell 12.

[0096] Understandably, 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 plate 221 of the magnetic circuit assembly 22, thereby further improving the connection stability between the outer shell 1 and the magnetic circuit system 2.

[0097] In this embodiment, the first magnet 222, the second magnetic plate 223, and the second magnet 224 are sequentially connected to the first magnetic plate 221 by adhesive bonding. It is understood that the two first magnetic plates 221 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage and achieving a high waterproof target.

[0098] In one implementation, such as Figures 1 to 3 As shown, the bottom shell 12 includes an annular body 121 and a sidewall 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 sidewall 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.

[0099] In one implementation, such as Figures 1 to 3 As shown, the bottom shell 12 includes an annular body 121 and a sidewall 122 connected to the annular body 121. The magnetic circuit assembly 22 is connected to the annular body 121 on the side away from the magnetic yoke 21. The sidewall 122 has a receiving hole 1221, and the magnetic circuit assembly 22 extends to the receiving hole 1221.

[0100] Understandably, by creating a receiving hole 1221 on the sidewall 122, each magnetic circuit assembly 22 can extend into the receiving hole 1221 and form an extension, thereby increasing the volume of each magnetic circuit assembly 22, improving the magnetic field strength, and thus enhancing the acoustic performance of the sound-generating device 100. It should be noted that the outer surface of the extension of the magnetic circuit assembly 22 does not extend beyond the outer surface of the sidewall 122. Optionally, the outer surface of the extension of the magnetic circuit assembly 22 is approximately flush with the outer surface of the sidewall 122, thus making the shape of the sound-generating device 100 more regular and easier to fit into the reserved space of electronic equipment.

[0101] In one embodiment, the vibration system 3 further includes a frame 33, which includes two frames respectively disposed at both ends of the voice coil 32 along a third direction. The frame 33 connects the voice coil and the diaphragm 312; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0102] In this embodiment, as Figure 3 , Figure 10 As shown, the voice coil 32 is connected to the diaphragm assembly 31 via the frame 33. This allows the frame 33 to adjust the vertical position and depth of the voice coil 32 within the magnetic gap 23, placing the voice coil 32 in a position with denser magnetic field lines, thereby improving the utilization rate of the magnetic circuit. Optionally, there are two frames 33, with the two frames 33 respectively located at both ends of the voice coil 32 along a third direction.

[0103] Understandably, the voice coil 32 is a flat voice coil 32 formed by winding wire. The voice coil 32 includes two opposing long axis sides disposed in the magnetic gap 23 and a short axis side connecting the two long axis sides. The skeleton 33 includes two skeletons, and the two skeletons 33 are disposed at both ends of the voice coil 32 along the long axis direction (i.e., the third direction), and are respectively connected to the diaphragm assembly 31's vibrating plate 312 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, which can reduce the width of the sound generating device 100, or, with a fixed width, can increase the setting size of the magnetic circuit assembly 22 and 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.

[0104] In one embodiment, the vibration system 3 further includes two centering supports 34, with corresponding skeletons 33 distributed at both ends of the voice coil 32.

[0105] Optionally, each frame 33 includes a first connecting portion 331 and a second connecting portion 332 and a third connecting portion 333 respectively located 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 a third direction and are respectively connected to two sides opposite to the voice coil 32. The two second connecting portions 332 are respectively connected to the diaphragm 312, and the two third connecting portions 333 are respectively connected to the two centering supports 34.

[0106] In this embodiment, as Figures 1 to 6 , Figure 10 As shown, each centering support 34 has at least two spot-welded pads for electrical connection. One spot-welded pad of each centering support 34 is connected to an external power supply line, and the other spot-welded pad of each centering support 34 is connected to a lead of the voice coil 32. In this way, current flows into the voice coil 32 through one centering support 34 and flows out through the other centering support 34, thus achieving conductivity between the voice coil 32 and the external power supply. This configuration solves the connection problem between the voice coil 32 and the external power supply, and also improves the balance of the voice coil 32, thereby reducing the polarization phenomenon of the vibration system 3.

[0107] Understandably, the skeleton 33 can be selected as 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. The two first connecting parts 331 of the two skeletons 33 are located at both ends of the voice coil 32 along a third direction and are respectively bonded to the two sides opposite to the voice coil 32. The two second connecting parts 332 are respectively connected to the diaphragm 312, and the two third connecting parts 333 are respectively connected to the two centering support plates 34.

[0108] This embodiment solves the connection problem between the voice coil 32 and the external power supply through the above settings, and also improves the balance of the voice coil 32, thereby reducing the polarization phenomenon of the vibration system 3.

[0109] In one embodiment, each centering support 34 includes an outer fixing part 341, an inner fixing part 342, and an elastic arm 343 connecting the outer fixing part 341 and the inner fixing part 342. Each inner fixing part 342 is connected to a frame 33 and is provided with an inner solder pad that is electrically connected to the lead wire of the voice coil 32.

[0110] In this embodiment, as Figures 1 to 6 , Figure 10 As shown, two centering supports 34 are located at both ends of the sound-generating device 100 along the long axis. Each centering support 34 includes an inner fixing part 342, an elastic arm 343, and an outer fixing part 341. The inner fixing part 342 is connected to the third connecting part 333 of the frame 33. The outer fixing part 341 is located on the outer shell 1. The two ends of the elastic arm 343 are respectively connected to the inner fixing part 342 and the outer fixing part 341. The outer fixing part 341 is also provided with an outer solder pad 3411 that can be electrically connected to an external circuit. The inner fixing part 342 is provided with an inner solder pad that is electrically connected to the lead wire of the voice coil 32.

[0111] Understandably, by setting the outer pad 3411, the centering support 34 can be connected and conductive to the external circuit, thereby facilitating the introduction of external circuit current into the voice coil 32. It should be noted that the inner fixing part 342 is provided with an inner pad, and the leads of the voice coil 32 are electrically connected to the inner pad.

[0112] Optionally, the outer solder pad 3411 and the centering support plate 34 are integrally molded components, thereby reducing the number of structural parts and facilitating the assembly of the sound-generating device 100. At the same time, the frame 33 is connected to the inner fixing part 342, that is, the frame 33 connects the vibrating plate 312, the voice coil 32 and the centering support plate 34, which can improve the vibration consistency of the vibration system 3, improve the response sensitivity of the sound-generating device 100, and reduce the generation of distortion, further optimizing the acoustic performance of the sound-generating device 100.

[0113] In one embodiment, the outer shell 1 is provided with a clearance opening 1222 for each outer fixing part 341, each outer fixing part 341 passes through the clearance opening 1222 and is provided with an outer solder pad 3411, and the magnetic yoke 21 bends and extends toward the outer fixing part 341 corresponding to each clearance opening 1222 to form a positioning protrusion 211.

[0114] In this embodiment, as Figures 1 to 3 As shown, the outer fixing portion 341 of the centering support 34 is at least partially located on the outside of the housing 1, facilitating the electrical connection of the outer solder pad 3411 with the external circuit. By providing a clearance opening 1222 on the housing 1, the outer fixing portion 341 of the centering support 34 extends to the outside of the housing 1.

[0115] Understandably, in order to cover the clearance opening 1222, the magnetic yoke 21 bends and extends toward the outer fixing part 341 to form a positioning protrusion 211 corresponding to each clearance opening 1222. That is, the outer fixing part 341 is located between the positioning protrusion 211 and the clearance opening 1222 of the outer shell 1.

[0116] In this embodiment, the centering support 34 provides a constraint force to constrain the voice coil 32 to vibrate along the vibration direction, while introducing external circuit current into the voice coil 32, which simplifies the number of structural components of the sound-generating device 100, simplifies the assembly process, and improves assembly efficiency.

[0117] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0118] Optionally, the electronic device of this utility model can be a portable mobile electronic product such as a mobile phone or tablet, or a wearable device such as a watch, VR, or AR, etc., without specific limitations.

[0119] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sound-generating device, characterized in that, The aspect ratio of the sound-generating device is greater than or equal to 2:1, and the sound-generating device includes: shell; A magnetic circuit system connected to the housing, the magnetic circuit system including a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, the two magnetic circuit components being arranged at intervals along a first direction and forming a magnetic gap between them; A vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, the periphery of the diaphragm assembly being connected to the housing, the voice coil having an axial direction along a first direction and being inserted into the magnetic gap, the voice coil driving the diaphragm assembly to vibrate along 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 as described in claim 1, characterized in that, The outer wall of the magnetic circuit system is provided with a welding groove, the metal connector is housed in the welding groove, and is welded to the magnetic yoke and the magnetic circuit assembly.

3. The sound-generating device as described in claim 2, characterized in that, The outer shell has a recessed groove corresponding to the welding groove, and the end of the metal connector away from the magnetic yoke extends into the recessed groove and is welded to the outer shell; And / or, the surface of the metal connector facing away from the welding groove does not extend beyond the outer surface of the magnetic yoke and the magnetic circuit assembly; And / or, the metal connectors include multiple components, and each magnetic circuit assembly is welded to at least one metal connector on the side facing away from the voice coil; or, the metal connector includes one component, which is located at the middle position on the side of the magnetic circuit assembly facing away from the voice coil.

4. The sound-generating device as described in claim 1, characterized in that, Each of the magnetic circuit components includes a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked sequentially along the second direction, wherein the second magnet is connected to the magnetic yoke; The metal connector is welded to the first magnetic plate, the second magnetic plate, and the magnetic yoke.

5. The sound-generating device as described in claim 4, characterized in that, The metal connector has a first through hole corresponding to the first magnetic plate, and the outer wall of the first magnetic plate has a first protrusion. The first protrusion passes through the first through hole and is welded to the metal connector. And / or, the metal connector has a second through hole corresponding to the second magnetic plate, the outer wall of the second magnetic plate has a second protrusion, the second protrusion passes through the second through hole and is welded to the metal connector.

6. The sound-generating device as described in claim 4, characterized in that, 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 two first magnets and two second magnets that are opposite to each other along the first direction are in opposite directions; And / or, the metal connectors are respectively provided with welding marking lines corresponding to the first magnetic plate, the second magnetic plate and the magnetic yoke; And / or, the outer casing is welded or bonded to the first magnetic plate.

7. The sound-generating device as described in claim 4, characterized in that, The inner wall of the outer shell is provided with a limiting part, which is connected to the first magnetic plate; Wherein, the side of the first magnetic plate near the magnetic gap protrudes along the second direction toward the direction away from the first magnet to form a protrusion, the protrusion and the first magnetic plate cooperate to form a limiting groove, the limiting part is limited in the limiting groove and abuts against the protrusion; And / or, the limiting part is provided with an avoidance groove corresponding to the folded ring part of the diaphragm assembly.

8. The sound-generating device as described in any one of claims 1 to 7, characterized in that, The diaphragm assembly includes a diaphragm and a vibrating plate connected to the diaphragm, the vibrating plate being connected to the voice coil; The outer shell includes a connected annular support and a bottom shell. The periphery of the diaphragm is bonded to the inner peripheral wall of the annular support, and the diaphragm and the annular support are integrally thermo-pressed or injection-molded. The bottom shell is connected to the magnetic circuit system.

9. The sound-generating device as described in claim 8, characterized in that, The bottom shell includes an annular body and a sidewall connected to the annular body. The magnetic circuit assembly is connected to the annular body on the side away from the magnetic yoke, and the sidewall is welded to the magnetic yoke. And / or, the bottom shell includes an annular body and a sidewall connected to the annular body, the magnetic circuit assembly is connected to the annular body on the side away from the magnetic yoke, the sidewall has a receiving hole, and the magnetic circuit assembly extends to the receiving hole; And / or, the bottom shell is a metal shell, and each magnetic circuit assembly includes a first magnetic guide plate, a first magnet, a second magnetic guide plate and a second magnet stacked sequentially along the second direction, the second magnet is connected to the magnetic guide yoke, and the bottom shell is welded to the first magnetic guide plate; And / or, the diaphragm is provided with reinforcing ribs that extend inward toward the side closer to the voice coil.

10. The sound-generating device as claimed in claim 8, characterized in that, The vibration system further includes a frame and a centering support. The frame includes two frames, which are respectively located at both ends of the voice coil along a third direction. The frame connects the voice coil and the resonating plate. The third direction is perpendicular to the first direction and the second direction, respectively. The centering support is two in number and is distributed at both ends of the voice coil corresponding to the skeleton. Each centering support includes an outer fixing part, an inner fixing part, and an elastic arm connecting the outer fixing part and the inner fixing part. Each inner fixing part is connected to a skeleton and is provided with an inner solder pad that is electrically connected to the lead wire of the voice coil. The outer shell has a clearance opening for each of the outer fixing parts, each of the outer fixing parts passes through the clearance opening and has an outer solder pad, and the magnetic yoke bends and extends toward the outer fixing part to form a positioning protrusion for each of the clearance openings.

11. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 10.

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