Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and an electronic device, and relates to the technical field of sound energy conversion, the ratio of the length to the width of the sounding device is greater than 2: 1, the sounding device comprises a housing, and a magnetic circuit system, a vibration system, a waterproof sealing ring and a support plate which are connected with the housing, and the housing is formed by injection molding of metal powder; the magnetic circuit system is provided with magnetic assemblies which form a magnetic gap and are arranged at intervals; the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm comprises a folding ring part connected with the shell and a reinforcing part arranged in the center area of the folding ring part, the reinforcing part is connected with the voice coil, the voice coil is arranged in the magnetic gap, the axial direction of the voice coil is in the short axis direction, and the waterproof sealing ring, the shell, the folding ring part and the reinforcing part are integrally formed through injection molding; the supporting plate comprises an annular plate connected with the inner side of the shell, the annular plate and the deformation part of the folding ring part are oppositely arranged in the vibration direction, and the magnetic assembly is connected to the annular plate. The sound production device is excellent in waterproof capability and deformation resistance capability of resisting front water pressure.

Description

Technical Field

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

[0002] With the development and widespread application of smart wearable products, the requirements for sound-generating devices such as speakers are becoming increasingly stringent. When users wear smart wearable products while swimming or diving, the sound-generating devices need to have a very high waterproof rating and resistance to deformation. Utility Model Content

[0003] The main purpose of this invention is to provide a sound-generating device and electronic device, which aims to improve the waterproof rating and deformation resistance of the sound-generating device.

[0004] To achieve the above objectives, the present invention proposes a sound-generating device having a length along its major axis and a width along its minor axis, wherein the ratio of the length to the width is greater than 2:1, and the sound-generating device comprises:

[0005] The outer shell is a ring-shaped frame structure with openings at both ends, and the outer shell is formed by metal powder injection molding;

[0006] A magnetic circuit system is connected to one end of the housing. The magnetic circuit system includes a support portion and two magnetic components spaced apart from the support portion along the short axis direction, with a magnetic gap formed between the two magnetic components.

[0007] A vibration system is connected to the other end of the housing. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate. The diaphragm includes a folded ring portion and a reinforcing portion disposed in the central region of the folded ring portion. The folded ring portion is connected to the housing, and the reinforcing portion is connected to the voice coil. The voice coil is disposed in the magnetic gap, and the axial direction of the voice coil is along the short axis direction.

[0008] A waterproof sealing ring, wherein the waterproof sealing ring is disposed at the end of the outer shell away from the magnetic circuit system and surrounds the diaphragm, and the waterproof sealing ring, the outer shell, the folded ring portion, and the reinforcing portion are integrally injection molded; and

[0009] The support plate includes an annular plate connected to the inner side of the housing. Along the vibration direction of the vibration system, the annular plate is disposed opposite to the deformed portion of the folded ring. The magnetic assembly is connected to the annular plate on the side away from the support portion.

[0010] In one embodiment, the sound-generating device further includes a connecting frame disposed at both ends of the reinforcing portion along the long axis direction, the connecting frame connecting the reinforcing portion and the voice coil.

[0011] In one embodiment, the sound-generating device further includes a centering support plate, which includes two sub-support plates and a conductive connection portion connecting the two sub-support plates. The two sub-support plates are disposed at both ends of the sound-generating device along the long axis. Each sub-support plate includes an inner fixing portion, a spring arm portion, and an outer fixing portion. The inner fixing portion is connected to the connecting frame, and the outer fixing portion is disposed on the outer shell. The two ends of the spring arm portion are respectively connected to the inner fixing portion and the outer fixing portion. The conductive connection portion is also provided with an external solder pad that can be electrically connected to an external circuit.

[0012] In one embodiment, each of the connecting frames includes a top plate, a side plate, and a bottom plate connected to each other. The bottom plate is disposed on the side of the side plate facing the inner fixing part and is used to connect the inner fixing part. The top plate is disposed on the end of the side plate facing the reinforcing part and is used to connect the reinforcing part. The side plate is connected to the side of the voice coil.

[0013] And / or, the conductive connection portion includes two electrical connection portions that respectively connect the two sub-support pieces and an external connection portion that connects the two electrical connection portions. The external connection portion is provided with an external solder pad. The electrical connection portion can be bent toward the side closer to the support portion so that the external connection portion abuts against the support portion. The external solder pad is located on the side of the external connection portion away from the support portion.

[0014] In one embodiment, the sidewall of the housing has a receiving hole, the magnetic assembly extends into the receiving hole, and the support plate further includes an extension plate extending from the annular plate into the receiving hole, the extension plate being disposed between the sidewall and the magnetic assembly.

[0015] In one embodiment, the support includes a bottom wall and a surrounding wall connected to the bottom wall, the surrounding wall being connected to the side wall, the surrounding wall having a receiving notch, the receiving notch being aligned with the receiving hole to form a through hole, and the magnetic component extending into the through hole.

[0016] In one embodiment, a groove is provided on the inner side of the waterproof sealing ring, and the groove extends circumferentially along the waterproof sealing ring;

[0017] And / or, the outer surface of the waterproof sealing ring extends obliquely from the end near the housing to the end away from the housing in a direction close to the diaphragm;

[0018] And / or, the waterproof sealing ring has a first protrusion that protrudes toward the housing and is embedded in the housing;

[0019] And / or, the outer casing has a second protrusion that protrudes toward the waterproof sealing ring and is embedded within the waterproof sealing ring;

[0020] And / or, the reinforcing part is provided with a positioning notch.

[0021] In one embodiment, the two magnetic components protrude along the vibration direction away from the support portion on the side near the magnetic gap to form a protrusion, and the annular plate surrounds the protrusion.

[0022] And / or, each of the magnetic components includes a first magnet, a second magnet, and a third magnet arranged sequentially along the vibration direction, the third magnet being disposed on the support portion, the first magnet and the third magnet being magnetized in a direction perpendicular to the vibration direction and in opposite directions; the second magnet being magnetized along the vibration direction, and the polarity of the second magnet's magnetic pole facing the first magnet being the same as the polarity of the first magnet's magnetic pole near the magnetic gap; the support portion is made of a non-magnetic material.

[0023] And / or, the support portion is provided with a relief groove facing the magnetic gap, the relief groove being a recessed groove or a through hole.

[0024] In one embodiment, the housing is provided with mounting ears at both ends along the long axis, and the mounting ears are provided with mounting holes for assembly.

[0025] And / or, the support part is made of metal, and the outer shell is welded to the support part;

[0026] And / or, the support plate is made of metal, and the outer shell is welded to the support plate.

[0027] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device.

[0028] In this invention, the waterproof sealing ring, the folded ring portion of the diaphragm, and the reinforcing portion are integrally injection molded with the outer shell, thereby improving the bonding strength between the waterproof sealing ring, the folded ring portion, and the reinforcing portion and the outer shell, and enhancing the waterproof capability of the sound-generating device. Furthermore, by using metal powder injection molding for the outer shell, the strength of the outer shell and the sound-generating device's resistance to deformation under frontal water pressure are improved. Simultaneously, the annular plate of the support plate is positioned opposite to the deformed portion of the folded ring portion, and the support plate is connected to the magnetic assembly. When the sound-generating device is subjected to water pressure from the front, the support plate can support the diaphragm and the reinforcing portion, avoiding the risk of diaphragm cracking and improving the reliability of the connection between the diaphragm, the reinforcing portion, and the outer shell, further enhancing the reliability and waterproof rating of the sound-generating device. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of the sound-generating device of this utility model;

[0031] Figure 2 This is a three-dimensional structural schematic diagram of another embodiment of the sound-generating device of this utility model.

[0032] Figure 3 This is an exploded structural diagram of an embodiment of the sound-generating device of this utility model;

[0033] Figure 4 This is a side view of an embodiment of the sound-generating device of this utility model;

[0034] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0035] Figure 6 This is a side view schematic diagram of the combined structure of the vibration system and the housing in one embodiment of the sound-generating device of this utility model;

[0036] Figure 7 for Figure 6 Cross-sectional view at BB;

[0037] Figure 8 for Figure 7 A magnified view of the area at point C;

[0038] Figure 9 This is a three-dimensional structural diagram of the reinforcing part of an embodiment of the sound-generating device of this utility model;

[0039] Figure 10 This is a schematic diagram of the structure of the conductive connection part of the sound-generating device of this utility model after bending.

[0040] Explanation of icon numbers:

[0041] 100. Sound-generating device;

[0042] 1. Outer shell; 11. Side wall; 12. Second protrusion; 13. Receiving hole;

[0043] 2. Vibration system; 21. Diaphragm; 211. Surround section; 212. Reinforcing section; 2121. Positioning notch; 22. Voice coil; 23. Connecting frame; 25. Centering support; 251. Sub-support; 252. Conductive connection section; 2521. External solder pad;

[0044] 3. Magnetic circuit system; 31. Magnetic component; 311. First magnet; 312. Second magnet; 313. Third magnet; 32. Support part; 321. Bottom wall; 322. Enclosure wall; 323. Receiving notch; 324. Clearance groove;

[0045] 4. Waterproof sealing ring; 41. First protrusion; 42. Groove;

[0046] 5. Support plate; 51. Annular plate; 52. Extension plate.

[0047] 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

[0048] 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 scope of protection of the present utility model.

[0049] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0050] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions 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 those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0051] With the development and widespread application of smart wearable products, the requirements for sound-generating devices such as speakers are becoming increasingly stringent. When users wear smart wearable products while swimming or diving, the sound-generating devices need to have a very high waterproof rating and resistance to deformation.

[0052] Therefore, it is necessary to propose a sound-generating device and electronic device that aims to improve the waterproof capability and deformation resistance of the sound-generating device.

[0053] Please see Figures 1 to 10 In one embodiment of this utility model, the sound-generating device 100 has a length along the major axis and a width along the minor axis, with a length-to-width ratio greater than 2:1. The sound-generating device 100 includes a housing 1, a magnetic circuit system 3, a vibration system 2, and a waterproof sealing ring 4. The housing 1 is an annular frame structure with openings at both ends, and is formed by metal powder injection molding. The magnetic circuit system 3 is connected to one end of the housing 1 and includes a support 32 and two magnetic components 31 spaced apart on the support 32 along the minor axis, forming a magnetic gap between the two magnetic components 31. The vibration system 2 is connected to the other end of the housing 1 and includes a diaphragm 21 and a voice coil 22 that drives the diaphragm 21 to vibrate. The diaphragm 21 includes a folded ring. The device 100 includes a folded ring 211 and a reinforcing part 212 located in the central region of the folded ring 211. The folded ring 211 is connected to the outer shell 1, and the reinforcing part 212 is connected to the voice coil 22. The voice coil 22 is located in the magnetic gap, and the axial direction of the voice coil 22 is along the short axis. A waterproof sealing ring 4 is located at the end of the outer shell 1 away from the magnetic circuit system 3 and surrounds the diaphragm 21. The waterproof sealing ring 4, the outer shell 1, the folded ring 211, and the reinforcing part 212 are integrally injection molded. The sound-generating device 100 also includes a support plate 5. The support plate 5 includes an annular plate 51 connected to the inner side of the outer shell 1. Along the vibration direction of the vibration system 2, the annular plate 51 is positioned opposite to the deformed portion of the folded ring 211. The magnetic component 31 is connected to the annular plate 51 on the side away from the support part 32.

[0054] The sound-generating device 100 of this utility model can be a single loudspeaker unit, and can be applied in electronic devices, such as computers, mobile phones, and smart wearable devices. This embodiment uses a single loudspeaker unit as an example for illustration.

[0055] In this application, by integrally injection molding the waterproof sealing ring 4, the folded ring portion 211 of the diaphragm 21, and the reinforcing portion 212 with the outer shell 1, the bonding strength between the waterproof sealing ring 4, the folded ring portion 211, and the reinforcing portion 212 and the outer shell 1 is improved, thereby enhancing the waterproof capability of the sound-generating device 100. Furthermore, by setting the outer shell 1 to be injection molded from metal powder, the strength of the outer shell 1 and the deformation resistance of the sound-generating device 100 against frontal water pressure are improved. At the same time, the support plate 5 is positioned opposite to the deformed portion of the folded ring portion 211, and the support plate 5 is connected to the magnetic component 31. When the sound-generating device 100 is subjected to water pressure from the front, the support plate 5 can support the folded ring portion 211 and the reinforcing portion 212, avoiding the risk of diaphragm 21 cracking, improving the reliability of the connection between the folded ring portion 211, the reinforcing portion 212, and the outer shell 1, and further enhancing the reliability and waterproof rating of the sound-generating device 100. It should be noted that the voice coil 22 can be a flat voice coil 22 formed by winding wire, or a planar coil formed by electroplating, or other coils suitable for this structure.

[0056] In this application, the sound-generating device 100 has a narrow and elongated shape. It should be noted that the sound-generating device 100 has a height (thickness) along the vibration direction, and the vibration direction, the major axis direction, and the minor axis direction are perpendicular to each other. The length-to-width ratio of the sound-generating device 100 is greater than 2:1, which allows for better adaptation to the reserved space of microelectronic devices, such as smart wearable devices (e.g., smartwatches).

[0057] Please see Figure 3 , Figure 5 and Figure 7 In one embodiment, the sound-generating device 100 further includes a connecting frame 23, which is disposed at both ends of the reinforcing part 212 along the long axis direction, and the connecting frame 23 connects the reinforcing part 212 and the voice coil 22.

[0058] It should be noted that in this embodiment, the voice coil 22 is a flat voice coil 22 formed by winding a wire. The voice coil 22 includes two opposing long axis sides disposed in the magnetic gap and a short axis side connecting the two long axis sides. The connecting frame 23 is disposed at both ends of the reinforcing part 212 along the long axis direction and connects the reinforcing part 212 and the short axis side. In this way, the connecting frame 23 does not occupy the width of the magnetic gap, which can reduce the width of the sound generating device 100, or, with a fixed width, can increase the setting size of the magnetic component 31 and improve the magnetic field performance. At the same time, the connecting frame 23 can flexibly adjust the (height) position of the voice coil 22 in the magnetic gap, which is convenient for operation.

[0059] Please see Figures 1 to 3 and Figure 10In one embodiment, the sound-generating device 100 further includes a centering support 25, which includes two sub-supports 251 and a conductive connection portion 252 connecting the two sub-supports 251. The two sub-supports 251 are located at both ends of the sound-generating device 100 along the long axis. Each sub-support 251 includes an inner fixing portion, a spring arm portion and an outer fixing portion. The inner fixing portion is connected to the connecting frame 23, and the outer fixing portion is located on the outer shell 1. The two ends of the spring arm portion are respectively connected to the inner fixing portion and the outer fixing portion. The conductive connection portion 252 is also provided with an external solder pad 2521 that can be electrically connected to an external circuit.

[0060] By providing the conductive connection part 252, the two sub-support pieces 251 can be electrically connected, thereby facilitating the introduction of external circuit current into the voice coil 22. It should be noted that an internal solder pad is provided on the inner fixing part, and the leads of the voice coil 22 are electrically connected to the internal solder pad. Optionally, the conductive connection part 252 and the sub-support piece 251 are integrally molded, thereby reducing the number of structural components and facilitating the assembly of the sound-generating device 100. Simultaneously, the connecting frame 23 is connected to the inner fixing part; that is, the connecting frame 23 simultaneously connects the reinforcing part 212, the voice coil 22, and the centering support piece 25. This can improve the vibration consistency of the vibration system 2, enhance the response sensitivity of the sound-generating device 100, reduce distortion, and further optimize the acoustic performance of the sound-generating device 100.

[0061] Furthermore, the conductive connection portion 252 is located on the outside of the housing 1, facilitating the electrical connection of the external solder pad 2521 to the external circuit. The conductive connection portion 252 includes two electrical connection portions that respectively connect the two sub-support pieces 251 and an external connection portion that connects the two electrical connection portions. The external connection portion is provided with an external solder pad 2521. The electrical connection portion can be bent toward the side closer to the support portion 32 so that the external connection portion abuts against the support portion 32. The external solder pad 2521 is located on the side of the external connection portion away from the support portion 32, thereby facilitating the assembly of the sound-generating device 100 with the electronic device.

[0062] In this embodiment, the centering support 25 provides a constraint force to constrain the voice coil 22 to vibrate along the vibration direction, while introducing external circuit current into the voice coil 22, which simplifies the number of structural components of the sound-generating device 100, simplifies the assembly process, and improves assembly efficiency.

[0063] In one embodiment, each connecting frame 23 includes a top plate, a side plate, and a bottom plate connected together. The bottom plate is disposed on the side of the side plate facing the inner fixing part and is used to connect to the inner fixing part. The top plate is disposed on the end of the side plate facing the reinforcing part 212 and is used to connect to the reinforcing part 212. The side plate is connected to the side of the voice coil 22. This facilitates the connection between the connecting frame 23 and the reinforcing part 212, the voice coil 22, and the centering support 25, improving the connection stability between the components.

[0064] refer to Figure 9In one embodiment, the reinforcing part 212 is provided with a positioning notch 2121; the positioning notch 2121 on the reinforcing part 212 is used to cooperate with external tooling to realize the positioning and installation of the connecting frame 23 or the voice coil 22. Optionally, the positioning notch 2121 penetrates through the edge of the reinforcing part 212, and there are multiple positioning notches 2121, which extend circumferentially along the edge of the reinforcing part 212.

[0065] Please see Figure 5 , Figure 7 and Figure 8 In one embodiment, a groove 42 is provided on the inner side of the waterproof sealing ring 4, extending circumferentially along the waterproof sealing ring 4. By providing the groove 42 on the inner side of the waterproof sealing ring 4, the waterproof sealing ring 4 is compressed when it is assembled and sealed with the whole machine. The groove 42 guides the waterproof sealing ring 4 to tilt inward, preventing it from turning outward and thus avoiding waterproofing failure. It is understood that the groove 42 is preferably provided in the connection area between the waterproof sealing ring 4 and the diaphragm 21, that is, at the bottom end of the waterproof sealing ring 4, so as to make better use of the shape of the waterproof sealing ring 4 to achieve a better waterproofing effect.

[0066] Alternatively, the outer surface of the waterproof sealing ring 4 can extend at an angle from the end closest to the outer shell 1 to the end furthest from the outer shell 1, in a direction close to the diaphragm 21. This also serves to guide the waterproof sealing ring 4 to tilt inward, preventing it from flipping outward and thus avoiding waterproofing failure. Of course, the waterproof sealing ring 4 can also be provided with both a groove 42 and an inclined surface, which is not limited here.

[0067] Please see Figure 7 and Figure 8 In one embodiment, the waterproof sealing ring 4 has a first protrusion 41 that protrudes towards the outer shell 1 and is embedded within the outer shell 1. By providing the first protrusion 41 embedded within the outer shell 1, the connection strength and reliability between the waterproof sealing ring 4 and the outer shell 1 are effectively improved.

[0068] In another embodiment, the outer casing 1 has a second protrusion 12 that protrudes toward and is embedded within the waterproof sealing ring 4, thereby effectively improving the connection strength and reliability between the waterproof sealing ring 4 and the outer casing 1. Of course, in other embodiments, the waterproof sealing ring 4 may simultaneously have a first protrusion 41 that protrudes toward and is embedded within the outer casing 1, and the outer casing 1 may have a second protrusion 12 that protrudes toward and is embedded within the waterproof sealing ring 4, further improving the connection strength and reliability between the waterproof sealing ring 4 and the outer casing 1.

[0069] Please see Figures 1 to 5In one embodiment, the sidewall 11 of the housing 1 has a receiving hole 13, and the magnetic component 31 extends into the receiving hole 13. By opening the receiving hole 13 on the sidewall 11, each magnetic component 31 can extend outward to form an extension, thereby increasing the volume of each magnetic component 31, 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 magnetic component 31 is approximately flush with the outer surface of the sidewall 11, so that the shape of the sound-generating device 100 is more regular and easier to fit into the reserved space of electronic devices.

[0070] Furthermore, the support plate 5 also includes an extension plate 52 extending from the annular plate 51 into the receiving hole 13, with the extension plate 52 disposed between the side wall 11 and the magnetic assembly 31. This arrangement of the annular plate 51 and the extension plate 52 further increases the connection area between the magnetic assembly 31 and the housing 1, enhancing the connection strength between them. It should be noted that the extension plate 52 and the annular plate 51 are in the same plane, thus reducing the height space of the sound-generating device 100; and the outer surface of the extension plate 52 is approximately flush with the outer surface of the side wall 11.

[0071] Furthermore, the support portion 32 includes a bottom wall 321 and a surrounding wall 322 connected to the bottom wall 321. The surrounding wall 322 is connected to the side wall 11 of the outer casing 1. The surrounding wall 322 has a receiving notch 323, which is aligned with the receiving hole 13 to form a through hole. The magnetic component 31 extends into the through hole. By aligning the receiving notch 323 of the support portion 32 with the receiving hole 13 of the outer casing 1 to form a through hole, and extending the magnetic component 31 into the through hole, the size of the magnetic component 31 can be further increased, thereby enhancing the magnetic field strength of the magnetic circuit system 3.

[0072] In one embodiment, the support part 32 is made of metal, and the outer shell 1 is welded to the support part 32. This can improve the connection strength between the outer shell 1, the support part 32, and the magnetic circuit system 3, thereby improving the reliability of the sound generating device 100.

[0073] Please see Figure 5 In one embodiment, the two magnetic components 31 protrude along the vibration direction away from the support portion 32 on the side near the magnetic gap to form a protrusion (not shown in the figure). By providing the protrusion, the volume of the two magnetic components 31 is increased, the magnetic induction intensity is improved, and the magnetic field region where the voice coil 22 is located is further expanded, so that the driving force factor of the sound generating device 100 can be symmetrical with respect to the static equilibrium position. In this embodiment, the annular plate 51 is arranged around the protrusion, that is, the annular plate 51 is located outside the protrusion, and the annular plate 51 does not protrude above the surface of the protrusion, so as to avoid increasing the height dimension of the sound generating device 100 by setting the annular plate 51.

[0074] In one embodiment, each magnetic component 31 includes a first magnet 311, a second magnet 312, and a third magnet 313 arranged sequentially along the vibration direction. The third magnet 313 is disposed on the support portion 32. The first magnet 311 and the third magnet 313 are both magnetized in a direction perpendicular to the vibration direction (i.e., the short axis direction) and in opposite directions. The second magnet 312 is magnetized along the vibration direction, and the polarity of the second magnet 312 toward the first magnet 311 is the same as the polarity of the first magnet 311 near the magnetic gap. The support portion 32 is made of a non-magnetic material. In this embodiment, by using the first magnet 311 and the third magnet 313 to be magnetized in a direction perpendicular to the vibration direction and in opposite directions, and the second magnet 312 to be magnetized along the vibration direction, and the polarity of the second magnet 312 toward the first magnet 311 is the same as the polarity of the first magnet 311 near the magnetic gap, the magnetic component 31 can form a magnetic field enhancement side toward the magnetic gap, thereby improving the magnetic field driving force and enhancing the acoustic performance of the loudspeaker. Furthermore, the first magnet 311 and the third magnet 313 are respectively positioned opposite the two long axes of the voice coil 22, forming a complete loop of magnetic field lines, which pass through the two long axes of the voice coil 22. It should be noted that the support portion 32 is made of a non-magnetic material to allow the magnetic field lines of the third magnet 313 to pass through the voice coil 22 more extensively in a direction perpendicular to the vibration direction, preventing the magnetic field lines from dispersing and ensuring the driving force of the voice coil 22. The support plate 5 is also made of a non-magnetic material, such as a non-magnetic steel plate, to allow the magnetic field lines of the first magnet 311 to flow out of the first magnet 311 and pass more extensively through the second magnet 312, forming a closed loop with the magnetic field lines of the third magnet 313.

[0075] In this embodiment, the first magnet 311 protrudes along the vibration direction away from the support portion 32 on the side near the magnetic gap, forming a protrusion. Simultaneously, the portion of the first magnet 311 located outside the protrusion is used for assembly and connection with the second housing. In this embodiment, the thickness of the outer portion of the first magnet 311 is less than the thickness of the third magnet 313, thus reducing the height of the sound-generating device 100 and its space occupation. Furthermore, by providing the protrusion, the volume of the first magnet 311 is increased, the magnetic induction intensity is improved, and the magnetic field region where the voice coil 22 is located is expanded, allowing the driving force factor of the sound-generating device 100 to be symmetrical relative to the static equilibrium position.

[0076] In one embodiment, the support portion 32 has a relief groove 324 facing the magnetic gap. The relief groove 324 can be a recessed groove 42 or a through hole. By providing the relief groove 324, a larger vibration space is provided for the voice coil 22. When the relief groove 324 is a through hole structure, the sound generating device 100 also includes a cover member located on the side of the support portion 32 away from the voice coil 22, and the cover member covers the through hole. By providing a cover member that covers the relief groove 324, the amplitude symmetry of the sound generating device 100 can be adjusted. It should be noted that the cover member can be a cover plate or a nylon mesh.

[0077] In one embodiment, the outer casing 1 has mounting ears at both ends along its long axis, and the mounting ears have mounting holes for assembly. By providing mounting ears on the outer casing 1, manufacturing is easier and the process difficulty is reduced.

[0078] In one embodiment, the housing 1 has a central portion and two ends located at both ends along the long side of the housing 1. The central portion protrudes towards the side away from the voice coil 22. It should be noted that the outer surface of the central portion near the diaphragm 21 protrudes towards the side away from the voice coil 22. The protrusion of the central portion towards the side away from the voice coil 22 is to better adapt to the shape of the electronic device housing, so that the housing 1 can extend along the electronic device housing and achieve a sealed contact between the housing 1 and the electronic device housing. The protrusion of the central portion towards the side away from the voice coil 22 makes the housing 1 have a curved or nearly curved shape to adapt to the shape of the electronic device housing, thereby improving the utilization rate of the internal space of the electronic device housing. In this embodiment, the shape of the diaphragm 21 is similar to that of the housing 1. By adapting the shape of the housing 1 to the shape of the electronic device's casing, a portion of the gap is used as the vibration space for the diaphragm 21. This increases the vibration space of the diaphragm 21 without increasing the installation space of the sound-generating device 100, and also increases the volume of the front acoustic cavity of the sound-generating device 100, thereby effectively improving the acoustic performance of the sound-generating device 100. It should be noted that the outer surface of the housing 1 can be an overall arc-shaped structure, or it can be a flat part in the center and a flat or curved part at the ends, or it can be a curved part in the center and a flat or curved part at the ends.

[0079] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The electronic device can be a computer, mobile phone, smart wearable device, etc. The specific structure of the sound-generating device 100 is as described in the above embodiments. Since the electronic device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A sound producing device, characterized by, The sound production device has a length along a long axis direction and a width along a short axis direction, a ratio of the length and the width is greater than 2:1, and the sound production device comprises: a shell, which is an annular frame structure with open ends, the shell being formed by metal powder injection molding; a magnetic circuit system connected to one end of the shell, the magnetic circuit system comprising a support part and two magnetic assemblies arranged at intervals along the short axis direction on the support part, a magnetic gap being formed between the two magnetic assemblies; a vibration system connected to the other end of the shell, the vibration system comprising a diaphragm and a voice coil for driving the diaphragm to vibrate, the diaphragm comprising a folded ring part and a reinforcing part arranged at a central region of the folded ring part, the folded ring part being connected to the shell, the reinforcing part being connected to the voice coil, the voice coil being arranged in the magnetic gap, and an axial direction of the voice coil being along the short axis direction; a waterproof sealing ring arranged at an end of the shell away from the magnetic circuit system and surrounding the diaphragm, the waterproof sealing ring, the shell, the folded ring part and the reinforcing part being integrally injection molded; and a support plate comprising an annular plate connected to an inner side of the shell, the annular plate being arranged opposite to a deformed part of the folded ring part along a vibration direction of the vibration system, and the magnetic assemblies being connected to the annular plate at a side away from the support part.

2. The sound production device of claim 1, wherein The sound production device further comprises a connecting skeleton arranged at two ends of the reinforcing part along the long axis direction, the connecting skeleton connecting the reinforcing part and the voice coil.

3. The sound production device of claim 2, wherein The sound production device further comprises a centering support sheet comprising two sub-support sheets and a conductive connecting part connecting the two sub-support sheets, the two sub-support sheets being arranged at two ends of the sound production device along the long axis direction, each of the sub-support sheets comprising an inner fixing part, a spring arm part and an outer fixing part, the inner fixing part being connected to the connecting skeleton, the outer fixing part being arranged on the shell, two ends of the spring arm part being connected to the inner fixing part and the outer fixing part respectively, and the conductive connecting part further comprising an external connecting pad capable of being electrically connected to an external circuit.

4. The sound production device of claim 3, wherein Each of the connecting skeletons comprises a top plate, a side plate and a bottom plate connected to each other, the bottom plate being arranged on a side of the side plate facing the inner fixing part and being used for connecting the inner fixing part, the top plate being arranged on an end of the side plate facing the reinforcing part and being used for connecting the reinforcing part, and the side plate being connected to a side surface of the voice coil. Furthermore, the conductive connecting part comprises two electric connecting parts respectively connected to the two sub-support sheets and an external connecting part connecting the two electric connecting parts, the external connecting part being provided with the external connecting pad, the electric connecting part being capable of being bent towards a side close to the support part so that the external connecting part abuts against the support part, and the external connecting pad being arranged on a side of the external connecting part away from the support part.

5. The sound production device of claim 1, wherein A side wall of the shell has a receiving hole, the magnetic assembly extends into the receiving hole, and the support plate further comprises an extension plate extending from the annular plate into the receiving hole, the extension plate being arranged between the side wall and the magnetic assembly.

6. The sound production device of claim 5, wherein The support part comprises a bottom wall and a surrounding wall connected with the bottom wall, the surrounding wall is connected with the side wall, the surrounding wall has a receiving gap, the receiving gap is connected with the receiving hole to form a through hole, and the magnetic assembly extends into the through hole.

7. A sound production device according to any one of claims 1 to 6, wherein The inner side of the waterproof sealing ring is provided with a groove extending along the circumference of the waterproof sealing ring; And / or, the outer side surface of the waterproof sealing ring extends in a direction close to the diaphragm from one end close to the shell to an end away from the shell; And / or, the waterproof sealing ring has a first protruding part protruding towards the shell and embedded in the shell; And / or, the shell has a second protruding part protruding towards the waterproof sealing ring and embedded in the waterproof sealing ring; And / or, the reinforcing part is provided with a positioning gap.

8. The sound production device of any one of claims 1 to 6, wherein, Two magnetic assemblies are provided with protruding parts protruding away from the support part along the vibration direction on the side close to the magnetic gap, and the annular plate surrounds the protruding parts; And / or, each magnetic assembly comprises a first magnet, a second magnet and a third magnet arranged in sequence along the vibration direction, the third magnet is arranged on the support part, the first magnet and the third magnet are magnetized in a direction perpendicular to the vibration direction and the magnetization directions are opposite; the second magnet is magnetized along the vibration direction, and the polarity of the magnetic pole of the second magnet towards the first magnet is the same as the polarity of the magnetic pole of the first magnet on the side close to the magnetic gap, and the support part is a non-magnetic material; And / or, the support part is provided with a avoiding groove opposite to the magnetic gap, and the avoiding groove is a recessed groove or a through hole.

9. The sound production device of any one of claims 1 to 6, wherein, The shell is provided with assembly ears at both ends along the long axis direction, and the assembly ears are provided with assembly holes for assembly; And / or, the support part is a metal material, and the shell and the support part are welded; And / or, the support plate is a metal material, and the shell and the support plate are welded.

10. An electronic device, comprising: The electronic device comprises the sound production device as claimed in any one of claims 1 to 9.

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