Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electronic equipment, in the sound production device, a magnetic circuit assembly is provided with a plurality of magnetic gaps arranged at intervals; the plurality of voice coils are respectively arranged in the plurality of magnetic gaps; the vibrating diaphragm is located on one side of the magnetic circuit assembly in the first direction, the vibrating diaphragm comprises a vibrating plate and a folding ring arranged on the periphery of the vibrating plate, and a part of the vibrating plate protrudes towards the direction of the voice coil to form a convex part; the framework is provided with a first end and a second end which are oppositely arranged along the first direction, the first end is connected with the convex part, the second end is provided with a plurality of first connecting parts, and the plurality of first connecting parts are respectively connected with the plurality of voice coils. The plurality of voice coils work in the same phase at the same time and drive the same diaphragm together. The design of the convex part on the vibrating plate can enable the voice coil to sink towards the direction far away from the vibrating diaphragm after being matched with the framework, and compared with a traditional structure, the voice coil can sink to a deeper position in a magnetic gap, so that the utilization rate of the magnetic gap is improved, and the effective length of cutting a magnetic induction line is increased.

Description

Technical Field

[0001] This invention relates to the field of electronic equipment technology, and particularly to sound-generating devices and electronic equipment. Background Technology

[0002] With the rapid upgrading of smartphones and other mobile devices, consumers' demands for audio-visual entertainment experiences are constantly increasing, leading to more stringent standards for the audio performance of the entire product. Especially in terms of mobile phone speaker performance, the market's pursuit of ultra-thin and ultra-wide screens has increasingly limited the physical space available for speaker placement. Improving the speaker's vibration area and maximum amplitude faces significant design bottlenecks, making the achievement of superior acoustic performance within limited space a crucial industry challenge. Summary of the Invention

[0003] The main objective of this invention is to provide a sound-generating device and electronic device that can improve the utilization rate of magnetic gaps, thereby improving overall performance.

[0004] To achieve the above objectives, the present invention provides a sound-generating device, comprising: A magnetic circuit assembly having multiple magnetic gaps spaced apart; Multiple voice coils are respectively disposed within multiple magnetic gaps; A diaphragm, located on one side of the magnetic circuit assembly in a first direction, the diaphragm including a diaphragm plate and a pleated ring disposed around the periphery of the diaphragm plate, a portion of the diaphragm plate protruding towards the voice coil to form a convex portion; and, The frame has a first end and a second end disposed opposite to each other along a first direction. The first end is connected to the diaphragm, and the second end is provided with a plurality of first connecting parts, which are respectively connected to a plurality of voice coils.

[0005] In one embodiment, the plurality of voice coils are arranged along a second direction; The skeleton includes a plurality of first frames arranged along a second direction, each of the plurality of first frames corresponding to a plurality of voice coils, and the two opposite ends of the plurality of first frames along the first direction corresponding to form a first end and a second end. Each of the first frames is provided with a plurality of first connecting parts.

[0006] In one embodiment, the first frame includes a support body, the support body is provided with a first connecting portion on the side facing the voice coil, and the side end of the support body is also provided with a second connecting portion, the second connecting portion being disposed to avoid the magnetic circuit assembly; The sound-generating device further includes a centering support plate, which includes an outer support portion, a cantilever portion, and an inner support portion connected in sequence, and the inner support portion is connected to the second connecting portion.

[0007] In one embodiment, the middle part of the support body is hollowed out to form a hollow area; The protrusion is arranged in a ring shape and corresponds to the outer periphery of the hollowed-out area.

[0008] In one embodiment, the first connecting portion includes a plurality of connecting segments arranged at intervals along the circumference of the support body, the plurality of connecting segments jointly connecting to the corresponding voice coil, and the plurality of connecting segments respectively corresponding to the major axis and / or minor axis of the corresponding voice coil.

[0009] In one embodiment, the second connecting portion includes a first support section and a second support section arranged at an angle. The first support section is connected to the side end of the bracket body, and the second support section extends along a first direction and is connected to the first support section and the centering support plate.

[0010] In one embodiment, the magnetic circuit assembly includes a magnetic yoke and a first central magnetic portion and a side magnetic portion disposed on the magnetic yoke. The first central magnetic portion includes a plurality of central magnets spaced apart along a second direction. The plurality of central magnets includes a first central magnet and two second central magnets. The first central magnet includes a main body segment and two extension segments located at opposite ends of the main body segment. The extension segments extend along the second direction, and the main body segment extends along a third direction perpendicular to the second direction. The two second central magnets are disposed on opposite sides of the main body segment along the second direction. The side magnetic portion includes two side magnets. The two side magnets are disposed on the side of the second central magnet facing away from the main body segment. The two side magnets are spaced apart from the plurality of central magnets to jointly enclose and form two magnetic gaps spaced apart along the second direction. Two voice coils are provided, with the major axis of each voice coil corresponding to the main body segment and the minor axis of each voice coil corresponding to the extension segment; The diaphragm is located on the side of the first central magnetic part away from the magnetic yoke.

[0011] In one embodiment, the magnetic circuit assembly further includes a second central magnetic part, which is disposed opposite to the first central magnetic part in a first direction. The second central magnetic part includes a third central magnet and two fourth central magnets disposed at intervals along a second direction. The third central magnet is connected to the first central magnet via a first washer, and the fourth central magnet is connected to the second central magnet via a second washer.

[0012] In one embodiment, the third central magnet is a bar magnet that corresponds only to the main body segment; and / or, The heights of the third and fourth central magnets along the first direction are less than the heights of the first and second central magnets along the first direction; and / or, The height of the side magnet along the first direction is greater than the height of the first center magnet and the second center magnet along the first direction.

[0013] The present invention also proposes an electronic device, including a sound-generating device, the sound-generating device comprising: A magnetic circuit assembly having multiple magnetic gaps spaced apart; Multiple voice coils are respectively disposed within multiple magnetic gaps; A diaphragm, located on one side of the magnetic circuit assembly in a first direction, the diaphragm including a diaphragm plate and a pleated ring disposed around the periphery of the diaphragm plate, a portion of the diaphragm plate protruding towards the voice coil to form a convex portion; and, The frame has a first end and a second end disposed opposite to each other along a first direction. The first end is connected to the diaphragm, and the second end is provided with a plurality of first connecting parts, which are respectively connected to a plurality of voice coils.

[0014] In this invention, multiple voice coils operate simultaneously and in phase, jointly driving the same diaphragm. Each voice coil, when energized, experiences a Lorentz force in the magnetic field. When multiple voice coils drive the same diaphragm in phase, based on the principle of electromagnetic vector superposition, their driving forces are superimposed, resulting in a greater total driving force than a single-voice-coil loudspeaker under the same current. This makes the diaphragm vibrate more strongly, improving the loudspeaker's sensitivity and maximum sound pressure level. The protrusions on the diaphragm, when combined with the frame, allow the voice coils to sink further away from the diaphragm. Compared to traditional structures, the voice coils can sink deeper into the magnetic gap, thereby improving the utilization rate of the magnetic gap, increasing the effective length of the cut magnetic field lines, and improving the overall performance by increasing the BL parameter. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 An exploded view of an embodiment of the sound-generating device provided by the present invention; Figure 2 for Figure 1 A structural diagram of the first frame in the middle; Figure 3for Figure 1 A cross-sectional schematic diagram of the sound-generating device.

[0017] Figure 4 for Figure 1 A top view of the first central magnet.

[0018] Explanation of icon numbers: 100. Sound-generating device; 1. Magnetic circuit assembly; 10. Magnetic gap; 11. Magnetic yoke; 12. First central magnet; 121. First central magnet; 1211. Main body section; 1212. Extension section; 122. Second central magnet; 13. Side magnet; 131. Side magnet; 14. Second central magnet; 141. Third central magnet; 142. First washer; 143. Fourth central magnet; 144. Second washer; 2. Voice coil; 31. Vibrating plate; 310. Protrusion; 32. Wrapper; 4. Frame; 41. First frame; 411. Support body; 412. Second connecting part; 4121. First support section; 4122. Second support section; 42. First connecting part; 421. Connecting section; 5. Centering support plate; 51. Outer support part; 52. Cantilever part; 53. Inner support part; 6. Outer shell.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, if the embodiments of this invention 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 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. If 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 invention.

[0023] With the rapid updates and iterations of smartphones and other mobile devices, consumers' demands for audio-visual entertainment experiences are constantly increasing, which places higher standards on the audio performance of terminal products. Especially in terms of the performance of individual mobile phone speaker units, the market expects superior sound quality, higher sound pressure level output, and a slimmer design. Unlike traditional external speakers, modern smartphones pursue extreme screen-to-body ratios and thinness, making the spatial layout and performance optimization of speakers particularly crucial. However, traditional designs face physical limitations in terms of vibration area and amplitude within a limited space, resulting in very limited room for improvement in acoustic performance, making it difficult to meet the current market demands for mobile phone audio experiences. Therefore, exploring innovative speaker architectures has become a core breakthrough for improving mobile phone audio performance.

[0024] Due to the limited space within the overall cavity, it is difficult to increase the vibration area and vibration displacement. To address these issues, this invention proposes a sound-generating device that can sink multiple voice coils deeper into the magnetic gap, thereby improving the utilization rate of the magnetic gap and achieving better performance.

[0025] Please refer to Figures 1 to 3 The sound-generating device 100 includes a magnetic circuit assembly 1, multiple voice coils 2, a diaphragm, and a frame 4. The magnetic circuit assembly 1 has multiple magnetic gaps 10 spaced apart. The multiple voice coils 2 are respectively disposed within the multiple magnetic gaps 10. The diaphragm is located on one side of the magnetic circuit assembly 1 in a first direction. The diaphragm includes a vibrating plate 31 and a folded ring 32 disposed around the vibrating plate 31. A portion of the vibrating plate 31 protrudes towards the voice coils 2 to form a protrusion 310. The frame 4 has a first end and a second end disposed opposite to each other in the first direction. The first end is connected to the diaphragm, and the second end is provided with multiple first connecting portions 42, which are respectively connected to the multiple voice coils 2.

[0026] It should be noted that the first direction, second direction, and third direction in this application are three mutually perpendicular directions. Depending on the different placement orientations of the device, the first direction can be up and down, the second direction can be left and right, and the third direction can be front and back. When the placement orientation of the device changes, the orientations referred to by the first direction, second direction, and third direction change accordingly. In this embodiment, the first direction is the vibration direction of the voice coil 2, the second direction is the short axis direction of the voice coil 2, and the third direction is the long axis direction of the voice coil 2.

[0027] In the technical solution of this invention, multiple voice coils 2 operate simultaneously and in phase, jointly driving the same diaphragm. Each voice coil 2, after being energized, experiences a Lorentz force in the magnetic field. When multiple voice coils 2 drive the same diaphragm in phase, based on the principle of electromagnetic vector superposition, their driving forces are superimposed, resulting in a greater total driving force than a single voice coil 2 speaker under the same current. This makes the diaphragm vibrate more strongly, improving the speaker's sensitivity and maximum sound pressure level. The design of the protrusion 310 on the diaphragm 31, in conjunction with the frame 4, allows the voice coils 2 to sink further away from the diaphragm. Compared to traditional structures, the voice coils 2 can sink deeper into the magnetic gap 10, thereby improving the utilization rate of the magnetic gap 10, increasing the effective length of the cut magnetic field lines, and improving the overall performance by increasing the BL parameter.

[0028] A hole is formed in the central area of ​​the folded ring 32, and the vibrating plate 31 covers the through hole, which can further reduce the mass of the diaphragm and adjust the acoustic performance of the sound-generating device 100.

[0029] The specific structural form of the first connecting part 42 is not limited. For example, it can be arranged in a ring or in a block shape. The first connecting part 42 can be arranged in an arc shape or in a straight line.

[0030] The protrusion 310 can be formed on the end face of the diaphragm 31 facing the voice coil 2, or it can be formed by partially sinking the end face of the diaphragm 31 away from the voice coil 2.

[0031] The number and structure of the protrusions 310 are not limited. Provided that the protrusions 310 meet certain dimensional requirements in the first direction, they can be designed to match the structure of the frame 4. For example, when the frame 4 is arranged in a ring shape, the protrusions 310 can be arranged in a corresponding ring shape to achieve a harmonious match between form and function, enhancing the fit between components and improving the overall structural stability and mechanical performance. For instance, when two protrusions 310 are arranged side-by-side on the frame 4 to correspond to the two voice coils 2, two protrusions 310 can be arranged accordingly.

[0032] The present invention does not limit the specific structure of the skeleton 4, as long as it can satisfy the connection relationship between the vibrating plate 31 and the voice coil 2. One skeleton 4 can be set to be bonded and cooperate with two voice coils 2 at the same time, or two skeletons 4 can be set to correspond to two voice coils 2 respectively.

[0033] Please refer to Figure 1 and Figure 2 Multiple voice coils 2 are arranged along a second direction. The frame 4 includes multiple first frames 41 arranged along the second direction, each first frame 41 corresponding to a voice coil 2. The two opposite ends of the multiple first frames 41 along the first direction form a first end and a second end, respectively. Each first frame is provided with multiple first connecting parts 42. This connection method enables a stable and effective transmission structure between the diaphragm and the voice coil 2. When the voice coil 2 vibrates due to changes in current in the magnetic field, the vibration of each voice coil 2 can be accurately and efficiently transmitted to the diaphragm 31 through the corresponding first frame 41. At the same time, there is a certain space between two adjacent first frames 41 along the second direction, which can provide more space for the placement of the magnetic circuit assembly 1.

[0034] In some embodiments, two adjacent first frames 41 may also be connected as one unit. No limitation is made here.

[0035] Furthermore, the first frame 41 includes a support body 411, with a first connecting portion 42 disposed on the side of the support body 411 facing the voice coil 2; a second connecting portion 412 is also disposed on the side end of the support body 411, the second connecting portion 412 being disposed to avoid the magnetic circuit assembly 1. The sound generating device 100 also includes a centering support 5, which connects the second connecting portion 412 and the lead wire of the voice coil 2. In the structural design of the first frame 41, the middle area of ​​the support body 411 is connected and cooperates with the voice coil 2, and the outer area of ​​the support body 411 is connected and cooperates with the centering support, thereby optimizing the internal spatial layout of the sound generating device 100 and reducing energy loss during vibration transmission while achieving a tight and stable connection.

[0036] It should be understood that the centering support 5, as an important component in the sound-generating device 100, is crucial to the performance of the entire sound-generating system. When the voice coil 2 vibrates, the centering support 5 can play a role in auxiliary positioning and buffering, preventing the voice coil 2 from shifting or shaking during vibration, thereby ensuring accurate sound propagation and stable sound quality.

[0037] The centering support 5 includes an outer support 51, a cantilever 52, and an inner support 53 connected in sequence. The outer support 51 is connected to the second connecting part 412, and the inner support 53 is also connected to the second connecting part 412, providing stable support for the centering support 5 and ensuring its fixed position during the operation of the sound-generating device 100. The cantilever 52 has a certain degree of elasticity, which can buffer and guide the vibration of the voice coil 2, making the vibration of the voice coil 2 more stable and regular. The inner support 53 is electrically connected to the lead wire of the voice coil 2, further enhancing the cooperative working ability between the voice coil 2 and the centering support 5. The centering support 5 is connected to the frame 4 and the diaphragm 31, which can suppress diaphragm polarization, free up the magnetic circuit, and eliminate the need for a larger clearance space to avoid the inner support 53, thereby increasing the magnet mounting volume. The increased magnet mounting volume can generate a stronger magnetic field, further improving the efficiency of the voice coil 2 in cutting magnetic field lines.

[0038] The inner support portion 43 also has a pad for electrical connection with the voice coil lead. The lead of the voice coil 2 can be attached to the inside of the second connection portion 412 and finally connected to the pad on the inner support portion 53.

[0039] The sound-generating device 100 also includes a housing 6, a diaphragm and a magnetic circuit assembly 1 respectively connected to both sides of the housing 6 along the first direction, the outer edge of the diaphragm connected to one end of the housing 6 along the first direction, and an outer support 51 connected to the end of the housing 6 away from the diaphragm.

[0040] Please refer to Figure 2 The central part of the support body 411 is hollowed out to form a hollow area, meaning the support body 411 as a whole has a ring-shaped structure, corresponding to the commutation structure of the voice coil 2. The protrusion 310 is also ring-shaped and corresponds to the outer perimeter of the hollow area, thus matching the support body 411. The hollowed-out design in the central part of the support body 411 not only reduces the weight of the first frame 41 and lowers the overall energy consumption of the sound-generating device 100, but also provides some space for heat dissipation.

[0041] The specific structural form of the first connecting part 42 is not limited. The first connecting part 42 can be arranged in a ring shape, corresponding to the outer periphery of the hollow area, and bonded to the end face of the voice coil 2. In this embodiment, the first connecting part 42 includes multiple connecting segments 421 arranged at intervals along the circumference of the support body 411. The multiple connecting segments 421 are connected to the corresponding voice coil 2, and the multiple connecting segments 421 correspond to multiple corners of the corresponding voice coil 2. The multiple connecting segments 421 are arranged at intervals, which can more evenly disperse the vibration transmitted from the voice coil 2, avoid the problem of stress concentration, and enable the first frame 41 to receive and transmit vibration more stably, which helps to improve the overall stability and reliability of the sound generating device 100. Considering the shape characteristics of the voice coil 2, the multiple connecting segments 421 correspond to multiple corners of the corresponding voice coil 2. That is, each connecting segment 421 can correspond to the adjacent two sides of the voice coil 2, thereby having a more stable connection and vibration transmission effect. It can also improve the airflow inside the sound-generating device 100, and improve the exchange efficiency and heat dissipation performance when the airflow inside the sound-generating device 100 exchanges with the outside through the sound vent.

[0042] Specifically, the first connecting part 42 is formed by bending and extending a portion of the support body 411 toward the voice coil 2. The design of the first connecting part 42 allows the voice coil 2 to sink further toward the magnetic yoke 11, which can free up the height design of the protrusion 310, or better match the protrusion 310, thereby improving the utilization rate of the magnetic gap 10, increasing the effective length of the cut magnetic field lines, and improving the overall performance by increasing the BL parameter.

[0043] The present invention does not limit the structural form of the second connecting part 412; it can be sheet-like or multi-segmented with bends. In this embodiment, the second connecting part 412 includes a first support segment 4121 and a second support segment 4122 arranged at an angle. The first support segment 4121 is connected to the side end of the support body 411 and is inclined in a second direction. The second support segment 4122 extends along a first direction, and the first support segment 4121 is connected to the centering support plate 5. The inclined arrangement of the first support segment 4121 can better adapt to the arrangement and shape characteristics of the magnetic circuit assembly 1, thereby achieving a good avoidance effect. The arrangement of the first support segment 4121 can compensate for the positional difference between the outer edge of the support body 411 and the outer edge of the magnetic circuit assembly 1, avoiding mutual interference that may occur during the operation of the sound-generating device 100, ensuring the stability of the magnetic field, and adapting to the distance between the frame 4 and the centering support plate 5. In the limited internal space, the L-shaped second connecting part 412 can be reasonably arranged and cooperate with other components, making the structure of the entire sound-generating device 100 more compact.

[0044] It should be noted that the first connecting part 42 and the second connecting part 412 can be assembled with the bracket body 411 as a whole. In this embodiment, the first connecting part 42 and the second connecting part 412 are integrally formed with the bracket body 411. Considering the structural strength and stress issues, the end face of the bracket body 411 away from the voice coil 2 is recessed near the hollow area, so that the side of the bracket body 411 facing the voice coil 2 forms a protruding structure, and the protruding structure constitutes the first connecting part 42.

[0045] The present invention does not limit the specific arrangement of the magnetic circuit component 1, as long as it can meet the magnetic field design requirements.

[0046] Please refer to Figure 1 and Figure 3 The magnetic circuit assembly 1 includes a magnetic yoke 11 and a first central magnetic part 12 and a side magnetic part 13 disposed on the magnetic yoke 11. The first central magnetic part 12 includes a plurality of central magnets spaced apart along a second direction. The side magnetic part 13 includes two side magnets 131, which are disposed on opposite sides of the first central magnetic part 12 along the second direction. The two side magnets 131 are spaced apart from the plurality of central magnets to jointly enclose two magnetic gaps 10 spaced apart along the second direction. Two voice coils 2 are provided. The diaphragm is located on the side of the first central magnetic part 12 away from the magnetic yoke 11. The two voice coils 2 are arranged in parallel and share one magnetic circuit assembly 1. Based on the arrangement of the magnetic gaps 10, the two voice coils 2 are arranged in a mirror symmetrical manner. When driven by a current in the same direction, based on the superposition principle of electromagnetic vectors, the Lorentz forces generated by the two voice coils 2 are in the same direction, thereby increasing the driving force output. This voice coil 2 layout avoids local stress concentration caused by single voice coil 2 driving. The design of two voice coils 2 improves the symmetry of the force on the diaphragm and reduces the nonlinear distortion of the vibration system.

[0047] The arrangement of the multiple central magnets is not limited. In some embodiments, the multiple central magnets are all magnetized along the vibration direction of the voice coil 2, and the multiple central magnets are spaced apart on the periphery of the two voice coils 2. That is, there are central magnets between the two voice coils 2 and on opposite sides of each voice coil 2 along the second direction, and the multiple central magnets are spaced apart from each other and do not contact each other.

[0048] In some embodiments, please refer to Figure 1 and Figure 4The plurality of central magnets include a first central magnet 121 and two second central magnets 122. The first central magnet 121 includes a main body segment 1211 and two extension segments 1212 located at opposite ends of the main body segment 1211. The extension segments 1212 extend along a second direction, and the main body segment 1211 extends along a third direction. The two second central magnets 123 are respectively disposed on opposite sides of the main body segment 1211 along the second direction. The major axis of the voice coil 2 corresponds to the main body segment 1211, and the minor axis of the voice coil 2 corresponds to the extension segments 1212. In this structure, two voice coils 2 are located on opposite sides of the main body segment 1211 along a third direction. Extension segments 1212 are added at both ends of the main body segment 1211 to increase the size of the first central magnet 121. The main body segment 1211 and the two extension segments 1212 are integrated as a whole. A closed magnetic circuit can be formed by the N and S poles of the first central magnet 121 in the first direction. The voice coils 2 can simultaneously cut the magnetic field lines of the main body segment 1211 and the extension segments 1212 at both ends, which can fully improve the space utilization and better fit the whole machine.

[0049] Compared to some structures where multiple magnets are separately placed to correspond to different directions of the voice coil 2, this integrated structure of the main body 1211 and the two extension sections 1212 provides a larger magnetic field coverage, more magnetic field cutting of the voice coil 2, and greater structural strength. The side magnet 131 is set separately and is not combined with the first center magnet 121 because, in terms of structural principle, even if the side magnet 131 and the first center magnet 121 were integrated, a notch would necessarily need to be set on the periphery of the voice coil 2 to avoid obstructing the frame 4 and other structures, thus increasing the difficulty of manufacturing.

[0050] Based on the arrangement of the magnetic circuit assembly 1, there are four inner support parts 53, which correspond to the areas between the side magnet 131 and the extension section 1212, respectively, thus ensuring spatial avoidance. It should be understood that, based on the four inner support parts 53, the cantilever part 52 is provided with four inner support parts 53 in a one-to-one correspondence, and the outer support part 51 can be provided with one, two, or four.

[0051] The two extension segments 1212 can have the same or different lengths in the second direction, and their connection points with the main body segment 1211 can be the same or different. Correspondingly, the two side magnets 131 are appropriately positioned to accommodate the two extension segments 1212. For example, the two extension segments 1212 connect to the main body segment 1211 at their midpoints, and the two extension segments 1212 have the same length. In this case, the first center magnet 121 is H-shaped, and the voice coil 2 can simultaneously cut the magnetic field lines at both ends of the H-shaped magnet. The two side magnets 131 are then arranged in a long strip shape (in conjunction with...). Figure 4For example, the two extension segments 1212 on the same side of the main body segment 1211 have different lengths, but the first central magnet 121 is centrally symmetrically arranged. Correspondingly, the two side magnets 131 are L-shaped and centrally symmetrically arranged. In this application, it is preferred that the two extension segments 1212 have the same length in the second direction, and the portions of the extension segments 1211 on the same side of the main body segment 1211 have the same length, which facilitates process design and ensures the consistency of the magnetic field lines cut by the two voice coils 21.

[0052] When the first center magnet 121 engages with the voice coil 2, the second center magnet 122 is located inside the voice coil 2, and the first center magnet 121 and the side magnet 131 together correspond to the outer side of the voice coil 2. In this embodiment, the short axis of the voice coil 2 corresponds to the extension segment 1212. That is, the long axis of the voice coil 2 extends along the second direction, and the short axis of the voice coil 2 extends along the third direction. This arrangement can increase space utilization and magnetic field line cutting while reducing the axial space of the entire device, which is beneficial to reducing the overall size of the device. It not only adapts to the flat structure of the device, which has significant advantages in today's pursuit of thin and light electronic devices, but also reduces resonance and noise problems that may be caused by excessive internal space, thus improving the purity of sound and sound quality.

[0053] Based on this embodiment, the skeleton 4 includes two first frames 41, corresponding to two voice coils 2, the area between the two first frames 41 corresponds to the main body segment 1211, and the second connecting part 412 in the first frame 41 is located on the side of the extension segment 1212 away from the main body segment 1211.

[0054] Specifically, the second connecting part 412 corresponds to the area between the side magnet 131 and the extension 1212.

[0055] When the second connecting part 412 is composed of the first support section 4121 and the second support section 4122, the first support section 4121 extends away from the support body 411 and away from the extension section 1212, so as to correspond to the periphery of the extension section 1212 and avoid the first central magnet 121.

[0056] On the two first frames 41, based on the cooperation of the main body segment 1211 and the two extension segments 1212 in the first central magnet 121, in the second direction, the two first support segments 4121 corresponding to the same extension segment 1212 extend away from each other.

[0057] It should be noted that each central magnet can be a single magnet structure or a combined magnet structure. When the central magnet is a combined magnet structure, it consists of a central washer and two magnets located on opposite sides of the central washer in the first direction.

[0058] The vibration effect of the diaphragm is influenced not only by the distribution and intensity of the magnetic field, but also by the relative positional relationship between the voice coil 2 and the magnetic circuit assembly 1. When the central magnet is a composite magnet structure, the middle of the voice coil 2 corresponds to the central washer in the first direction. This arrangement allows the voice coil 2 to be positioned in the middle of the magnetic gap 10, which not only improves the utilization rate of the magnetic gap 10, but also helps to optimize the effective range of the magnetic field, thereby improving the overall vibration performance of the diaphragm and the stability of the sound output.

[0059] Similarly, the side magnet 131 can be a single magnet structure or a combined magnet structure. When the side magnet 131 is a combined magnet structure, it consists of a side washer and two magnets located on opposite sides of the side washer in the first direction. The two magnets have the same polarity towards the side washer.

[0060] In this embodiment, the magnetic circuit assembly 1 further includes a second central magnetic section 14, which is disposed opposite to the first central magnetic section 12 in a first direction. The second central magnetic section 14 includes a third central magnet 141 and two fourth central magnets 143 spaced apart along a second direction. The third central magnet 141 is connected to the first central magnet 121 via a first washer 142, and the fourth central magnets 143 are connected to the second central magnet 122 via a second washer 144. In this embodiment, the first central magnetic section 12 and the second central magnetic section 14 are symmetrically arranged, which can improve the magnetic flux density and magnetic field uniformity, so that the voice coil 2 is subjected to a more stable and balanced driving force when moving in the magnetic field. This stable driving force helps to reduce nonlinear distortion during the movement of the voice coil 2, thereby significantly improving the sound reproduction and sound quality performance of the sound generating device 100. At the same time, the symmetrical arrangement design also enhances the overall stability of the magnetic circuit assembly 1, reduces vibration and noise that may be caused by uneven magnetic field distribution, and further optimizes the sound quality.

[0061] Specifically, the use of the first washer 142 and the second washer 144 not only serves to connect the central magnet but also effectively conducts and concentrates the magnetic field. They can better guide the magnetic field generated by the central magnet to the area where the voice coil 2 is located, improving the utilization rate of the magnetic field and enabling the voice coil 2 to more efficiently convert electrical energy into mechanical energy, thereby improving the sound energy conversion efficiency of the sound-generating device 100. The third central magnet 141 and the two fourth central magnets 143 correspond one-to-one with the first central magnet 121 and the two second central magnets 122, respectively, providing greater flexibility in the design of the magnetic circuit assembly 1.

[0062] Both the first central magnet 12 and the second central magnet 14 are magnetized along the vibration direction of the voice coil 2, and the first central magnet 121 and the third central magnet 141 have the same magnetic pole near the first washer 142; the second central magnet 122 and the fourth central magnet 143 have the same magnetic pole near the second washer 144. By arranging the first central magnet 12 and the second central magnet 14 with opposite polarities, a closed magnetic circuit is formed, increasing the magnetic flux density. This increased magnetic flux density means that the voice coil 2 experiences a stronger Ampere force when moving in the magnetic field, thus driving it to vibrate more powerfully. The stronger Ampere force allows the voice coil 2 to produce a larger amplitude, thereby increasing the sound pressure level of the sound-generating device 100 and making the sound louder and clearer. Simultaneously, because the magnetic field is more concentrated and stable, the voice coil 2 experiences less interference during its movement, allowing it to vibrate more accurately according to changes in the electrical signal, further improving the sound reproduction accuracy and the purity of the sound quality. Moreover, this opposite polarity arrangement can reduce the occurrence of magnetic leakage, reduce the interference of the magnetic field on other surrounding electronic components, and improve the electromagnetic compatibility of the entire sound-generating device 100. For example, when the end of the first central magnet 121 near the first washer 142 is the N pole, and the end of the third central magnet 141 near the first washer 142 is also the N pole; the end of the second central magnet 122 near the second washer 144 is the S pole, and the end of the fourth central magnet 143 near the second washer 144 is also the S pole, the magnetic field lines start from the N pole of the first central magnet 12, pass through the area where the voice coil 2 is located, return to the S pole of the second central magnet 14, and then return to the N pole of the first central magnet 12 through the other parts of the magnetic circuit, forming a complete closed magnetic circuit.

[0063] In some embodiments, the shapes of the third central magnet 141 and the first washer 142 are adapted to the first central magnet 121. For example, if the first central magnet 121 is H-shaped, then the third central magnet 141 and the first washer 142 are both H-shaped, and the dimensions of the three are matched.

[0064] In this embodiment, the third central magnet 141 is a strip-shaped arrangement that corresponds only to the main body segment 1211. This arrangement is to reserve space on both sides of the third central magnet 141 along the second direction, thereby providing more space for the skeleton 3 and other structures, so as to avoid the protrusion 220 of the vibrating plate 22 during the vibration of the diaphragm.

[0065] In this embodiment, the first center magnet 121 is H-shaped, the third center magnet 141 is elongated, and the second center magnet 122 and the fourth center magnet 143 are adapted to the shape of the inner hole of the voice coil 2 because they correspond to the inner hole of the voice coil 2.

[0066] The vibration effect of the diaphragm is influenced not only by the distribution and intensity of the magnetic field, but also by the relative positional relationship between the voice coil 2 and the magnetic circuit assembly 1. In this embodiment, in the first direction, the middle part of the voice coil 2 corresponds to the first washer 142. This arrangement allows the voice coil 2 to be positioned in the middle of the magnetic gap 10, which not only improves the utilization rate of the magnetic gap 10, but also helps to optimize the effective range of the magnetic field, thereby improving the overall vibration performance of the diaphragm and the stability of the sound output.

[0067] Based on this, when the third central magnet 141 is a strip-shaped arrangement that corresponds only to the main body segment 1211, it can also avoid the vibrating plate 22 in the second direction. This avoidance design can also optimize the spatial layout inside the sound-generating device.

[0068] The heights of the third center magnet 141 and the fourth center magnet 143 along the first direction are less than the heights of the first center magnet 121 and the second center magnet 122 along the first direction; with the height dimension of the sound-generating device 100 being constant, this ensures that the diaphragm has sufficient vibration space and that the vibration spaces of the voice coil 2 on opposite sides in the first direction tend to be consistent.

[0069] Based on the structural design of the magnet, the height of the side magnet 131 is greater than the height of the first central magnet 121 and the second central magnet 122. Therefore, in the spatial arrangement, since the voice coil 2 is located between the washer and the side magnet 131, the reasonable height setting of the side magnet 131 can make the position of the voice coil 2 in the magnetic gap 10 fill. That is, the relationship between the winding width of the voice coil 2 and the height of the magnetic gap 10 is more suitable, and the utilization efficiency of magnetic energy is high.

[0070] Based on the above embodiments, since the overall trend of the diaphragm is downward bending, it is prone to interference with the side magnet 131 when the diaphragm vibrates downward. Therefore, the thickness of the side magnet 131 needs to be lower than the superimposed thickness of the first central magnet 12 and the second central magnet 14 in the first direction. With respect to this structure of the first central magnet 121 and the third central magnet 141, the side magnet 131 is higher than the first central magnet 121 in the first direction, but lower than the third central magnet 141.

[0071] Please refer to Figure 1In this embodiment, the sound-generating device 100 is composed of a vibrating plate 31, a diaphragm, an injection-molded shell 6, a frame 4, a first central magnet 121 and two second central magnets 122 forming a combined magnet structure, two voice coils 2, a side magnetic part 13, four centering supports 5, and a magnetic yoke 11. The two voice coils 2 share a magnetic circuit system. When driven by a current in the same direction, based on the principle of superposition of electromagnetic vectors, the Lorentz force generated by the two voice coils 2 forms a synergistic effect, thereby increasing the driving force output. The side magnet 131, the first central magnet 121, and the second central magnet 122 are neodymium iron boron magnets, which form a closed magnetic circuit loop by alternating N and S poles. The first central magnet 121 adopts an H-shaped structure, which transforms the traditional method of cutting only a single-sided central magnetic field line into a multi-sided one, thus fully improving the space utilization. Both magnets in the first central magnet 121 and the second central magnet 122 are designed with opposing magnetic poles to form a closed magnetic circuit, thereby increasing the magnetic flux density. The diaphragm 31 is connected to the two first frames 41 by forming two annular protrusions 310 through a recessed groove. This allows the voice coil 2 to sink to a magnetic gap 10 depth that is unattainable in traditional designs, increasing the effective working length of the voice coil 2 and improving the utilization rate of the magnetic gap. Ultimately, this increases the product's BL value and makes it more suitable for overall assembly.

[0072] The present invention also proposes an electronic device, which includes a sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0073] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: A magnetic circuit assembly having multiple magnetic gaps spaced apart; Multiple voice coils are respectively disposed within multiple magnetic gaps; A diaphragm, located on one side of the magnetic circuit assembly in a first direction, the diaphragm including a diaphragm plate and a pleated ring disposed around the periphery of the diaphragm plate, a portion of the diaphragm plate protruding towards the voice coil to form a convex portion; and, The frame has a first end and a second end disposed opposite to each other along a first direction. The first end is connected to the protrusion, and the second end is provided with a plurality of first connecting parts, which are respectively connected to a plurality of voice coils.

2. The sound-generating device as described in claim 1, characterized in that, The multiple voice coils are arranged along the second direction; The skeleton includes a plurality of first frames arranged along a second direction, each of the plurality of first frames corresponding to a plurality of voice coils, and the two opposite ends of the plurality of first frames along the first direction corresponding to form a first end and a second end. Each of the first frames is provided with a plurality of first connecting parts.

3. The sound-generating device as described in claim 2, characterized in that, The first frame includes a support body, the support body is provided with a first connecting part on the side facing the voice coil, and the side end of the support body is also provided with a second connecting part, the second connecting part being disposed to avoid the magnetic circuit assembly; The sound-generating device further includes a centering support plate, which includes an outer support portion, a cantilever portion, and an inner support portion connected in sequence, and the inner support portion is connected to the second connecting portion.

4. The sound-generating device as described in claim 3, characterized in that, The main body of the support is hollowed out in the middle to form a hollow area; The protrusion is arranged in a ring shape and corresponds to the outer periphery of the hollowed-out area.

5. The sound-generating device as described in claim 3, characterized in that, The first connecting portion includes a plurality of connecting segments arranged at intervals along the circumference of the support body. The plurality of connecting segments are connected together to the corresponding voice coil, and each connecting segment corresponds to the major axis and / or minor axis of the corresponding voice coil.

6. The sound-generating device as described in claim 3, characterized in that, The second connecting part includes a first support section and a second support section arranged at an angle. The first support section is connected to the side end of the bracket body, and the second support section extends along a first direction and is connected to the first support section and the centering support plate.

7. The sound-generating device as claimed in claim 1, characterized in that, The magnetic circuit assembly includes a magnetic yoke and a first central magnetic part and a side magnetic part disposed on the magnetic yoke. The first central magnetic part includes a plurality of central magnets spaced apart along a second direction. The plurality of central magnets includes a first central magnet and two second central magnets. The first central magnet includes a main body segment and two extension segments located at opposite ends of the main body segment. The extension segments extend along the second direction, and the main body segment extends along a third direction perpendicular to the second direction. The two second central magnets are disposed on opposite sides of the main body segment along the second direction. The side magnetic part includes two side magnets. The two side magnets are disposed on the side of the second central magnet facing away from the main body segment. The two side magnets are spaced apart from the plurality of central magnets to jointly enclose and form two magnetic gaps spaced apart along the second direction. Two voice coils are provided, with the major axis of each voice coil corresponding to the main body segment and the minor axis of each voice coil corresponding to the extension segment; The diaphragm is located on the side of the first central magnetic part away from the magnetic yoke.

8. The sound-generating device as claimed in claim 7, characterized in that, The magnetic circuit assembly further includes a second central magnetic part, which is disposed opposite to the first central magnetic part in a first direction. The second central magnetic part includes a third central magnet and two fourth central magnets disposed at intervals along a second direction. The third central magnet is connected to the first central magnet through a first washer, and the fourth central magnet is connected to the second central magnet through a second washer.

9. The sound-generating device as described in claim 8, characterized in that, The third central magnet is a bar magnet that corresponds only to the main body segment; and / or The heights of the third and fourth central magnets along the first direction are less than the heights of the first and second central magnets along the first direction; and / or, The height of the side magnet along the first direction is greater than the height of the first center magnet and the second center magnet along the first direction.

10. An electronic device, characterized in that, Includes the sound-generating device as described in any one of claims 1 to 9.

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