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, a magnetic circuit system, a vibration system and a waterproof sealing ring, the magnetic circuit system, the vibration system and the waterproof sealing ring are connected with the housing, and the housing comprises a first housing and a second housing which are connected with each other. The first shell is made of a plastic material, and the second shell is formed through injection molding of metal powder; the magnetic circuit system is connected with the second shell, and the magnetic circuit system is provided with a formed magnetic gap; the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm comprises a folding ring part and a reinforcing part arranged in the central area of the folding ring part, the folding ring part is connected with the first shell, the reinforcing part is connected with the voice coil, the voice coil is arranged in the magnetic gap, and the axial direction of the voice coil is in the short axis direction; wherein the waterproof sealing ring, the first shell, the folding ring part and the reinforcing part are integrally formed through injection molding. 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 casing includes a first shell and a second shell connected to each other, the first shell being made of plastic and the second shell being injection molded from metal powder.

[0006] A magnetic circuit system connected to the second housing, the magnetic circuit system including a support plate and two magnetic components spaced apart on the support plate along the short axis, with a magnetic gap formed between the two magnetic components;

[0007] A vibration system comprising a diaphragm and a voice coil for driving the diaphragm to vibrate, the diaphragm comprising a folded ring portion and a reinforcing portion disposed in the central region of the folded ring portion, the folded ring portion being connected to the first housing, the reinforcing portion being connected to the voice coil, the voice coil being disposed in the magnetic gap, and the axial direction of the voice coil being along the minor axis direction; and

[0008] A waterproof sealing ring is disposed at the end of the first housing away from the second housing; wherein the waterproof sealing ring, the first housing, the folded ring portion, and the reinforcing portion are integrally injection molded.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] In one embodiment, the sound-generating device further includes a reinforcing bracket extending along the long axis. The reinforcing bracket includes two main body segments spaced apart along the short axis and a connecting segment connecting the two main body segments. The connecting segment is recessed toward the voice coil to form a recessed portion. The recessed portion extends along the long axis, and an airflow channel is formed between the recessed portion and the reinforcing portion.

[0014] In one embodiment, each of the main body segments has a positioning portion formed by bending towards the voice coil at both ends along the long axis direction;

[0015] And / or, the reinforcing part is provided with a positioning notch.

[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 first housing to the end away from the first housing in a direction close to the diaphragm;

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

[0019] And / or, the first housing has a second protrusion that protrudes toward the waterproof sealing ring and is embedded within the waterproof sealing ring.

[0020] In one embodiment, the two magnetic components protrude along the vibration direction toward the direction away from the support plate on the side near the magnetic gap to form a protrusion.

[0021] 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 plate, 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 plate is made of a non-magnetic material.

[0022] And / or, the support plate has a clearance hole facing the magnetic gap, and the sound-generating device further includes a cover, which is located on the side of the support plate away from the voice coil and covers the clearance hole.

[0023] In one embodiment, the second housing includes an annular body and a sidewall connected to the annular body, the magnetic assembly is connected to the annular body on the side away from the support plate, and the sidewall is welded to the support plate;

[0024] And / or, the second housing includes an annular body and a sidewall connected to the annular body, the magnetic assembly is connected to the annular body on the side away from the support plate, the sidewall has a receiving hole, and the magnetic assembly has an extension extending to the receiving hole;

[0025] And / or, the second housing is provided with mounting ears at both ends along the long axis, and the mounting ears are provided with mounting holes for assembly.

[0026] In one embodiment, the reinforcing part has a plurality of vent holes, and the sound-generating device further includes a waterproof and breathable membrane that covers the vent holes;

[0027] Alternatively, at least a portion of the reinforcing part is made of breathable material, and the sound-generating device further includes a waterproof and breathable membrane covering the breathable material;

[0028] And / or, the reinforcing part is provided with reinforcing ribs, the reinforcing ribs being located in the central region of the reinforcing part and extending along the long axis direction.

[0029] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device.

[0030] In the technical solution of this utility model, the outer shell includes a first shell made of plastic, and the waterproof sealing ring, the folded ring of the diaphragm and the reinforcing part are integrally injection molded with the first shell, thereby improving the waterproof capability of the sound-generating device; furthermore, the second shell is made by metal powder injection molding, which improves the sound-generating device's resistance to deformation under frontal water pressure and enhances the reliability of the sound-generating device. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a three-dimensional structural diagram of an embodiment of the sound-generating device of this utility model;

[0033] Figure 2 This is a three-dimensional structural schematic diagram of another embodiment of the sound-generating device of this utility model.

[0034] Figure 3 This is an exploded structural diagram of an embodiment of the sound-generating device of this utility model;

[0035] Figure 4 This is a side view of an embodiment of the sound-generating device of this utility model;

[0036] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0037] Figure 6 This is a side view schematic diagram of the combined structure of the vibration system and the first housing in one embodiment of the sound-generating device of this utility model;

[0038] Figure 7 for Figure 6 Cross-sectional view at BB;

[0039] Figure 8 for Figure 7 A magnified view of the area at point C;

[0040] Figure 9 This is a cross-sectional schematic diagram of the combined structure of the vibration system and the first housing in one embodiment of the sound-generating device of this utility model;

[0041] Figure 10 This is a schematic diagram of the combined structure of the reinforcing part and the reinforcing bracket in an embodiment of the sound-generating device of this utility model from different angles.

[0042] Figure 11 This is a schematic diagram of the structure of the conductive connection part of the sound-generating device of this utility model after bending.

[0043] Explanation of icon numbers:

[0044] 100. Sound-generating device;

[0045] 1. Outer shell; 11. First shell; 111. Second protrusion; 12. Second shell; 121. Annular body; 122. Side wall; 1221. Receiving hole;

[0046] 2. Vibration system; 21. Diaphragm; 211. Hoop; 212. Reinforcing part; 2121. Vent hole; 2122. Positioning notch; 213. Waterproof and breathable membrane; 22. Voice coil; 23. Connecting frame; 24. Reinforcing bracket; 241. Main body section; 2411. Positioning part; 242. Connecting section; 25. Centering support; 251. Sub-support; 252. Conductive connection part; 2521. External solder pad;

[0047] 3. Magnetic circuit system; 31. Magnetic component; 310. Magnetic gap; 311. First magnet; 312. Second magnet; 313. Third magnet; 32. Support plate; 321. Clearance hole; 4. Waterproof sealing ring; 41. First protrusion; 42. Groove; 5. Covering component.

[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 scope of protection of the present utility model.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Please see Figures 1 to 11 In one embodiment of this utility model, the sound-generating device 100 has a length along its major axis and a width along its 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, and a vibration system 2. The housing 1 includes a first housing 11 and a second housing 12 connected together. The first housing 11 is made of plastic, and the second housing 12 is injection molded from metal powder. The magnetic circuit system 3 is connected to the second housing 12 and includes a support plate 32 and two magnetic components 31 spaced apart on the support plate 32 along its minor axis, forming a gap between the two magnetic components 31. The magnetic gap; the vibration system 2 includes a diaphragm 21 and a voice coil 22 that drives the diaphragm 21 to vibrate. The diaphragm 21 includes a folded ring portion 211 and a reinforcing portion 212 located in the central region of the folded ring portion 211. The folded ring portion 211 is connected to the first housing 11, and the reinforcing portion 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 direction. The sound-generating device 100 also includes a waterproof sealing ring 4, which is located at the end of the first housing 11 away from the second housing 12. The waterproof sealing ring 4, the first housing 11, the folded ring portion 211, and the reinforcing portion 212 are integrally injection molded.

[0055] 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.

[0056] In this application, by setting the outer shell 1 to include a first shell 11 made of plastic, and integrally injection molding the waterproof sealing ring 4, the folded ring portion 211 of the diaphragm 21, and the reinforcing portion 212 with the first shell 11, the waterproof capability of the sound-generating device 100 is improved; furthermore, by setting the second shell 12 to be injection molded by metal powder, the strength of the second shell 12 is improved, the resistance of the sound-generating device 100 to deformation under frontal water pressure is improved, and the reliability of the sound-generating device 100 is further improved. It should be noted that the voice coil 22 is a flat voice coil 22 formed by winding wire, or a planar coil formed by electroplating or other forms suitable for this structure.

[0057] 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).

[0058] Please see Figure 3 and Figure 6 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.

[0059] 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.

[0060] Please see Figure 3 , Figure 7 and Figure 9In 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.

[0061] 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.

[0062] Furthermore, such as Figure 1-2 , Figure 11 As shown, 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 towards the side closer to the support plate 32 so that the external connection portion abuts against the support plate 32. The external solder pad 2521 is located on the side of the external connection portion away from the support plate 32, thereby facilitating the assembly of the sound-generating device 100 with the electronic equipment.

[0063] 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.

[0064] 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.

[0065] Please see Figure 3 , Figures 6 to 7 In one embodiment, the sound-generating device 100 further includes a reinforcing bracket 24, which extends along the long axis and includes two main body segments 241 spaced apart along the short axis and a connecting segment 242 connecting the two main body segments. The connecting segment 242 is recessed toward the voice coil 22 to form a recessed portion, which extends along the long axis, and an airflow channel is formed between the recessed portion and the reinforcing portion 212.

[0066] By connecting the reinforcing bracket 24 to the reinforcing part 212, the structural strength of the reinforcing part 212 is improved, thereby avoiding the segmented vibration during high-frequency vibration of the reinforcing part 212 and improving the mid-to-high frequency sound quality of the sound-generating device 100. By configuring the reinforcing bracket 24 to include two spaced-apart main body sections 241 and a connecting section 242 connecting the two main body sections, the connecting section 242 is recessed towards the voice coil 22 to form a recessed part, which extends along the long axis. An airflow channel is formed between the recessed part and the reinforcing part 212, making the internal airflow of the sound-generating device 100 smoother, which is conducive to balancing the air pressure in various areas inside the sound-generating device 100 and improving the vibration performance of the vibration system 2.

[0067] In this embodiment, the reinforcing part 212 can be further configured as at least partially waterproof and breathable, with the waterproof and breathable structure positioned opposite to the airflow channel. Optionally, a plurality of vent holes 2121 are provided in the area of ​​the reinforcing part 212 corresponding to the airflow channel, and a waterproof and breathable membrane 213 is further provided to cover the vent holes 2121. The vent holes 2121 of the reinforcing part 212 can facilitate the flow of air between the internal and external parts of the sound-generating device 100, balance the internal and external air pressure of the sound-generating device 100, improve the vibration performance of the diaphragm 21, and enhance the sensitivity of the sound-generating device 100. Furthermore, by positioning the waterproof and breathable structure opposite to the airflow channel, the smoothness of the internal airflow of the sound-generating device 100 is improved, further enhancing the smoothness of the internal and external airflow of the sound-generating device 100 and improving the acoustic performance of the sound-generating device 100.

[0068] In this embodiment, each main body segment 241 has a positioning portion 2411 formed by bending towards the voice coil 22 at both ends along its long axis. By providing positioning portions 2411 at both ends of each main body segment 241 along its long axis, during assembly, the positioning portions 2411 cooperate with external tooling to position the reinforcing bracket 24 in the central region of the reinforcing portion 212, i.e., the distance between the two ends of the reinforcing bracket 24 and the two ends of the reinforcing portion 212 is equal. This avoids the polarization oblique vibration problem of the reinforcing portion 212 during vibration and improves its vibration stability. Alternatively, the reinforcing portion 212 may have a positioning notch 2122; by utilizing the positioning notch 2122 on the reinforcing portion 212 in cooperation with external tooling, the reinforcing bracket 24 can be positioned in the central region of the reinforcing portion 212. Optionally, the positioning notch 2122 penetrates through the edge of the reinforcing portion 212, and there are multiple positioning notches 2122, which extend circumferentially along the edge of the reinforcing portion 212. Of course, the aforementioned positioning part 2411 can also be provided on the main body section 241 and the aforementioned positioning notch 2122 can also be provided on the reinforcing part 212. This application does not impose any restrictions here.

[0069] Please see 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.

[0070] Alternatively, the outer surface of the waterproof sealing ring 4 can extend obliquely from the end near the first housing 11 to the end away from the first housing 11 in a direction close to the diaphragm 21; this can also guide the waterproof sealing ring 4 to tilt inward, preventing it from turning 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.

[0071] Please see Figure 7 and Figure 8 In one embodiment, the waterproof sealing ring 4 has a first protrusion 41 that protrudes towards the first housing 11 and is embedded within the first housing 11. By providing the first protrusion 41 embedded within the first housing 11, the connection strength and reliability between the waterproof sealing ring 4 and the first housing 11 are effectively improved.

[0072] In another embodiment, the first housing 11 has a second protrusion 111 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 first housing 11. 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 first housing 11, and the first housing 11 may have a second protrusion 111 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 first housing 11.

[0073] Please see Figure 2 and Figure 3 In one embodiment, the second housing 12 includes an annular body 121 and a sidewall 122 connected to the annular body 121. The side of the magnetic assembly 31 away from the support plate 32 is connected to the annular body 121, and the sidewall 122 is welded to the support plate 32. This effectively enhances the connection strength between the second housing 12, the support plate 32, and the magnetic circuit system 3. In this embodiment, the support plate 32 is made of metal.

[0074] Please see Figures 1 to 3 In one embodiment, the second housing 12 includes an annular body 121 and a sidewall 122 connected to the annular body 121. The side of the magnetic assembly 31 away from the support plate 32 is connected to the annular body 121. The sidewall 122 has a receiving hole 1221, and the magnetic assembly 31 has an extension extending to the receiving hole 1221. By opening the receiving hole 1221 on the sidewall 122, each magnetic assembly 31 can extend outward to form an extension, thereby increasing the volume of each magnetic assembly 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 extension 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 devices.

[0075] Please see Figure 5 In one embodiment, the two magnetic components 31 protrude along the vibration direction away from the support plate 32 on the side near the magnetic gap to form a protrusion (not shown in the figure); by setting 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 voice coil 22 can be symmetrical relative to the static equilibrium position.

[0076] Please see Figure 5In 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 a support plate 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 plate 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 plate 32 is made of a non-magnetic material, so that the magnetic field lines of the third magnet 313 can pass through the voice coil 22 more along a direction perpendicular to the vibration direction, preventing the magnetic field lines from dispersing and ensuring the driving force of the voice coil 22.

[0077] In this embodiment, the first magnet 311 protrudes along the vibration direction away from the support plate 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 12. 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.

[0078] In one embodiment, the support plate 32 has a clearance hole 321 facing the magnetic gap; the sound-generating device 100 also includes a cover 5, which is located on the side of the support plate 32 away from the voice coil 22, and covers the clearance hole 321; by providing the clearance hole 321, a larger vibration space is provided for the voice coil 22. The cover 5, which covers the clearance hole 321, serves to adjust the amplitude symmetry of the sound-generating device 100. It should be noted that the cover 5 can be a cover plate or a nylon mesh.

[0079] Please see Figure 3 , Figure 9 and Figure 10In one embodiment, the reinforcing part 212 has a plurality of vent holes 2121, and the sound-generating device 100 also includes a waterproof and breathable membrane 213, which covers the vent holes 2121. By providing a plurality of vent holes 2121 on the reinforcing part 212, it is beneficial to balance the air pressure inside and outside the sound-generating device 100. By providing a waterproof and breathable membrane 213 covering the vent holes 2121, the waterproof performance of the sound-generating device 100 is effectively improved while ensuring the balance of air pressure inside and outside the sound-generating device 100.

[0080] According to another embodiment of the present invention, at least a portion of the reinforcing part 212 is made of a breathable material, and the sound-generating device 100 further includes a waterproof and breathable membrane 213 covering the breathable material. By making at least a portion of the reinforcing part 212 a breathable material, it is beneficial to balance the air pressure inside and outside the sound-generating device 100. By providing a waterproof and breathable membrane 213 covering the breathable material, the waterproof performance of the sound-generating device 100 is effectively improved while ensuring the balance of air pressure inside and outside the sound-generating device 100. It should be noted that the breathable material can be an organic aerogel, or a foamed metal, etc.

[0081] According to one embodiment of this utility model, the cover 5 is a double-sided adhesive layer. One side of the double-sided adhesive layer is bonded to the side of the support plate 32 opposite to the voice coil 22, and the other side of the double-sided adhesive layer is used to bond the conductive connection part 252 of the centering support piece 25, that is, the side of the external connection part opposite to the external solder pad 2521, so that the conductive connection part 252 can remain in a bent state, thereby facilitating the assembly of the sound generating device 100 with the whole machine. It should be noted that a release film extending into the clearance hole 321 is provided on the side of the double-sided adhesive layer facing the magnetic gap. The release film is used to contact the voice coil 22. The release film is provided to prevent the vibrating voice coil 22 from sticking to the double-sided adhesive layer.

[0082] In one embodiment, the second housing 12 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 second housing 12, it is easier to manufacture and the process difficulty is reduced.

[0083] 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.

[0084] 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.

[0085] 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-generating device, characterized in that, The sound-generating device has a length along its major axis and a width along its minor axis, the ratio of the length to the width being greater than 2:1, and the sound-generating device includes: The outer casing includes a first shell and a second shell connected to each other, the first shell being made of plastic and the second shell being injection molded from metal powder. A magnetic circuit system connected to the second housing, the magnetic circuit system including a support plate and two magnetic components spaced apart on the support plate along the short axis, with a magnetic gap formed between the two magnetic components; A vibration system comprising a diaphragm and a voice coil for driving the diaphragm to vibrate, the diaphragm comprising a folded ring portion and a reinforcing portion disposed in the central region of the folded ring portion, the folded ring portion being connected to the first housing, the reinforcing portion being connected to the voice coil, the voice coil being disposed in the magnetic gap, and the axial direction of the voice coil being along the minor axis direction; and A waterproof sealing ring is disposed at the end of the first housing away from the second housing; wherein the waterproof sealing ring, the first housing, the folded ring portion, and the reinforcing portion are integrally injection molded.

2. The sound-generating device as described in claim 1, characterized in that, The sound-generating device further includes a connecting frame, which is disposed at both ends of the reinforcing part along the long axis direction, and the connecting frame connects the reinforcing part and the voice coil.

3. The sound-generating device as described in claim 2, characterized in that, 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 located 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 located 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.

4. The sound-generating device as described in claim 3, characterized in that, 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. 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.

5. The sound-generating device as described in claim 1, characterized in that, The sound-generating device further includes a reinforcing bracket that extends along the long axis. The reinforcing bracket includes two main body segments spaced apart along the short axis and a connecting segment connecting the two main body segments. The connecting segment is recessed toward the voice coil to form a recessed portion. The recessed portion extends along the long axis, and an airflow channel is formed between the recessed portion and the reinforcing portion.

6. The sound-generating device as described in claim 5, characterized in that, Each of the main body segments has a positioning portion formed by bending towards the voice coil at both ends along the long axis direction; And / or, the reinforcing part is provided with a positioning notch.

7. The sound-generating device according to any one of claims 1 to 6, characterized in that, The inner side of the waterproof sealing ring is provided with a groove, which extends along the circumference of the waterproof sealing ring. And / or, the outer surface of the waterproof sealing ring extends obliquely from one end near the first housing to the end away from the first housing in a direction close to the diaphragm; And / or, the waterproof sealing ring has a first protrusion that protrudes toward the first housing and is embedded in the first housing; And / or, the first housing has a second protrusion that protrudes toward the waterproof sealing ring and is embedded within the waterproof sealing ring.

8. The sound-generating device according to any one of claims 1 to 6, characterized in that, The two magnetic components protrude from the side near the magnetic gap along the vibration direction of the vibration system in a direction away from the support plate to form a protrusion. And / or, each of the magnetic components includes a first magnet, a second magnet, and a third magnet arranged sequentially along the vibration direction of the vibration system, the third magnet being disposed on the support plate, the first magnet and the third magnet being magnetized in a direction perpendicular to the vibration direction of the vibration system and in opposite directions; the second magnet being magnetized along the vibration direction of the vibration system, 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 plate is made of a non-magnetic material. And / or, the support plate has a clearance hole facing the magnetic gap, and the sound-generating device further includes a cover, which is located on the side of the support plate away from the voice coil and covers the clearance hole.

9. The sound-generating device as described in any one of claims 1 to 6, characterized in that, The second housing includes an annular body and a sidewall connected to the annular body. The magnetic assembly is connected to the annular body on the side away from the support plate, and the sidewall is welded to the support plate. And / or, the second housing includes an annular body and a sidewall connected to the annular body, the magnetic assembly is connected to the annular body on the side away from the support plate, the sidewall has a receiving hole, and the magnetic assembly has an extension extending to the receiving hole; And / or, the second housing is provided with mounting ears at both ends along the long axis, and the mounting ears are provided with mounting holes for assembly.

10. The sound-generating device according to any one of claims 1 to 6, characterized in that, The reinforcing part has multiple vent holes, and the sound-generating device also includes a waterproof and breathable membrane that covers the vent holes. Alternatively, at least a portion of the reinforcing part is made of breathable material, and the sound-generating device further includes a waterproof and breathable membrane covering the breathable material; And / or, the reinforcing part is provided with reinforcing ribs, the reinforcing ribs being located in the central region of the reinforcing part and extending along the long axis direction.

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.

Images