Sound-producing apparatus and electronic device

Abstract

A sound-producing apparatus and an electronic device. The sound-producing apparatus comprises a magnetic circuit system, a conductive support, a vibration system, and a housing. From inside to outside, the magnetic circuit system is provided with a mounting hole, a first magnetic gap, and a second magnetic gap that are sequentially arranged at intervals. The conductive support is provided with a mounting hole. The vibration system comprises a diaphragm assembly, a first voice coil, a second voice coil, a first support piece, and second support pieces. One end of each of the first voice coil and the second voice coil is fixedly arranged on the diaphragm assembly, and the other end of each of the first voice coil and the second voice coil is arranged corresponding to the first magnetic gap and the second magnetic gap, respectively. One end of the first support piece is fixedly arranged on the diaphragm assembly and is separately electrically connected to the first voice coil and the second voice coil, and the other end of the first support piece is electrically connected to the conductive support. A plurality of second support pieces are arranged at intervals in the circumferential direction of the second voice coil. The housing is connected to the magnetic circuit system and the diaphragm assembly, and the housing is further connected to the second voice coil by means of the second support pieces.

Description

Sound-generating devices and electronic equipment Technical Field

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

[0002] Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in loudspeakers, earpieces, and headphones. To achieve high performance and large amplitude, a multi-voice-coil sound-generating device has been proposed, where multiple voice coils synchronously drive a single diaphragm. While this structure increases the amplitude and sensitivity of the sound-generating device, the multiple voice coils complicate its structure, making it more difficult to design the corresponding centering structure and thus affecting the centering effect of the centering support.

[0003] Utility Model Content

[0004] The main purpose of this invention is to provide a sound-generating device that improves the operational stability of the vibration system of the sound-generating device and enhances the sound-generating effect.

[0005] To achieve the above objectives, the sound-generating device proposed in this utility model includes:

[0006] The magnetic circuit system is provided with mounting holes, a first magnetic gap, and a second magnetic gap arranged sequentially from the inside to the outside;

[0007] A conductive bracket is disposed in the mounting hole;

[0008] A vibration system includes a diaphragm assembly, a first voice coil, a second voice coil, a first support plate, and a second support plate. The diaphragm assembly is disposed opposite to the magnetic circuit system. One end of the first voice coil is fixed to the diaphragm assembly, and the other end is disposed corresponding to the first magnetic gap. One end of the second voice coil is fixed to the diaphragm assembly, and the other end is disposed corresponding to the second magnetic gap. One end of the first support plate is fixed to the diaphragm assembly and electrically connected to both the first and second voice coils. The other end of the first support plate is electrically connected to the conductive support. Multiple second support plates are spaced apart along the circumference of the second voice coil.

[0009] The housing connects the magnetic circuit system and the diaphragm assembly, and the housing is also connected to the second voice coil via the second support plate.

[0010] In one embodiment, the magnetic circuit system includes a magnetic yoke and a central magnetic circuit portion, a first side magnetic circuit portion, and a second side magnetic circuit portion disposed on the same side of the magnetic yoke. The first side magnetic circuit portion is disposed around the central magnetic circuit portion and forms a first magnetic gap with the central magnetic circuit portion. The second side magnetic circuit portion is disposed around the first side magnetic circuit portion and forms a second magnetic gap with the first side magnetic circuit portion. The second side magnetic circuit portion is provided with a clearance notch for accommodating the second support piece. The mounting hole passes through the magnetic yoke and the central magnetic circuit portion.

[0011] In one embodiment, the first support includes a first connecting portion, a first elastic portion, and a second connecting portion connected in sequence. The first connecting portion is electrically connected to the conductive support, and the second connecting portion is fixed to the diaphragm assembly and electrically connected to the leads of the first voice coil and the second voice coil. The two ends of the first elastic portion are respectively connected to the first connecting portion and the second connecting portion.

[0012] In one embodiment, the second connecting portion includes a first connecting segment and a second connecting segment. The second connecting segment is connected to the first elastic portion through the first connecting segment. The width of the second connecting segment is greater than the width of the first connecting segment. The second connecting segment is located between the first voice coil and the second voice coil. The leads of the first voice coil and the second voice coil are electrically connected to the second connecting segment.

[0013] In one embodiment, the vibration system further includes a first frame, the first voice coil being connected to the diaphragm assembly via the first frame, and a first clearance groove being provided on the surface of the first frame near the diaphragm assembly corresponding to the first connecting segment.

[0014] In one embodiment, the central magnetic circuit portion includes a central magnet connected to the magnetic yoke and a central washer disposed at one end of the central magnet near the diaphragm assembly. The surface of the central washer near the diaphragm assembly is provided with a second clearance groove corresponding to the first connecting segment.

[0015] In one embodiment, the first side magnetic circuit portion includes a first side magnet connected to the magnetic yoke and a first side washer disposed at one end of the first side magnet near the diaphragm assembly, wherein the first side washer is provided with an avoidance break corresponding to the second connecting segment.

[0016] In one embodiment, the first connecting portion, the first elastic portion, and the second connecting portion are integrally formed.

[0017] In one embodiment, the first elastic portion has at least one bend.

[0018] In one embodiment, multiple first support plates are provided, and the multiple first support plates are arranged at intervals along the circumference of the conductive support.

[0019] In one embodiment, the plurality of the first support pieces are integrally formed.

[0020] In one embodiment, the main body of the first support piece is made of an insulating material, and conductive lines are provided on the insulating material. The first voice coil and the second voice coil are both electrically connected to the conductive support through the conductive lines.

[0021] In one embodiment, the second side magnetic circuit portion is formed into a square structure, and the avoidance notch is provided at each of the four corners of the second side magnetic circuit portion. There are four second support plates, which are arranged one-to-one in the corresponding avoidance notch.

[0022] In one embodiment, the first side magnetic circuit portion is formed as a closed ring structure, and the second side magnetic circuit portion includes a plurality of second side magnets arranged at intervals, with the avoidance gap defined between adjacent second side magnets.

[0023] In one embodiment, the magnetic yoke and the conductive support are integrally injection molded.

[0024] In one embodiment, the second support includes a third connecting portion, a second elastic portion, and a fourth connecting portion connected in sequence. The third connecting portion is connected to the second voice coil, and the fourth connecting portion is connected to the housing. The second elastic portion has at least one bend.

[0025] In one embodiment, the second sheet is made of an elastomer, metal, or engineering plastic.

[0026] In one embodiment, the diaphragm assembly includes:

[0027] A diaphragm is disposed opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm;

[0028] The skeleton is disposed in the inner annular hole and connected to the diaphragm; the first support plate is connected to the skeleton; and the skeleton has mounting holes corresponding to the conductive bracket.

[0029] A spherical dome, wherein the spherical dome is disposed at the assembly hole;

[0030] Both the first voice coil and the second voice coil are connected to the skeleton.

[0031] In one embodiment, the frame is provided with a connecting flange extending from the edge of the mounting hole toward the interior of the mounting hole. The first support includes a first connecting portion, a first elastic portion, and a second connecting portion connected in sequence. The first connecting portion is electrically connected to the conductive bracket. The second connecting portion is fixed to the diaphragm assembly and electrically connected to the leads of the first voice coil and the second voice coil. The two ends of the first elastic portion are respectively connected to the first connecting portion and the second connecting portion. A transition section extending along the vibration direction of the diaphragm assembly is provided between the second connecting portion and the first elastic portion. The transition section is fitted and connected to the connecting flange.

[0032] This invention also proposes an electronic device, including the aforementioned sound-generating device.

[0033] In this invention, by arranging multiple voice coils, the amplitude of the vibration system can be increased, thereby enhancing the loudness of the sound-generating device. The first support plate is connected to a conductive bracket, which is located within the magnetic circuit system. The magnetic circuit system is relatively fixed to the outer casing. The second support plate is connected to the second voice coil and the outer casing, ensuring that both the outer casing and the magnetic circuit system provide support points for the vibration system. This allows the first and second support plates to provide stabilizing forces, preventing swaying and polarization during large-amplitude vibrations. Furthermore, because multiple second support plates are arranged circumferentially, multiple circumferentially spaced positions on the vibration system receive stabilizing forces from the second support plates, which helps ensure the vibration stability of the system. Moreover, by placing the conductive bracket within the mounting holes of the magnetic circuit system, the space required for leading out the first support plate in the magnetic circuit system is eliminated, thereby increasing the volume of the magnetic circuit system and improving the product's BL value. Furthermore, due to severe magnetic leakage at the central position of the magnetic circuit system, the mounting hole needs to be formed by removing at least a portion of the central magnet at the central position of the magnetic circuit system. This reduces the magnetic leakage of the central magnet. When the sound-generating device is assembled with electronic equipment, the impact of magnetic leakage of the central magnet in the sound-generating device on the performance of the electronic equipment can be reduced, thus meeting the requirements of the electronic equipment for the amount of magnetic leakage. Attached Figure Description

[0034] 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.

[0035] Figure 1 is an exploded structural diagram of an embodiment of the sound-generating device of this utility model;

[0036] Figure 2 is a schematic diagram of the structure exposed after removing the diaphragm assembly in an embodiment of the sound-generating device of this utility model;

[0037] Figure 3 is a schematic diagram of the structure exposed after removing the magnetic yoke in an embodiment of the sound-generating device of this utility model.

[0038] Figure 4 is a structural schematic diagram of an embodiment of the bottom (side where the magnetic yoke is provided) of the sound-generating device of this utility model;

[0039] Figure 5 is a structural schematic diagram of an embodiment of the top (side where the diaphragm assembly is provided) of the sound-generating device of this utility model;

[0040] Figure 6 is a schematic diagram of the cross-sectional structure of Figure 2 cut along XX;

[0041] Figure 7 is a magnified view of the local structure between the two dashed lines in Figure 6;

[0042] Figure 8 is a structural schematic diagram of an embodiment of the two integrally formed first support pieces of the sound-generating device of this utility model.

[0043] Figure 9 is a schematic diagram of the first frame of the sound-generating device of this utility model;

[0044] Figure 10 is a schematic diagram of the cooperation between the conductive support and the magnetic yoke of the sound-generating device of this utility model in one embodiment.

[0045] Figure 11 is a partial enlarged view of the skeleton of the diaphragm assembly of the sound-generating device of this utility model at the assembly hole.

[0046] Reference numerals: 100, Outer shell; 200, Magnetic circuit system; 201, First magnetic gap; 202, Second magnetic gap; 203, Mounting hole; 210, Magnetic yoke; 220, Central magnetic circuit section; 221, Central magnet; 222, Central washer; 2221, Second clearance groove; 230, First side magnetic circuit section; 231, First side magnet; 232, First side washer; 2321, Clearance break; 240, Second side magnetic circuit section; 241, Second side magnet; 242, Second side washer; 243, Clearance notch; 300, Vibration system; 310, Diaphragm assembly; 311, Diaphragm; 3111, Inner ring hole; 312, Frame; 3121, Mounting hole; 3122. Connecting flange; 3123. First boss; 3124. Second boss; 313. Dome; 320. First voice coil; 321. First frame; 3211. First clearance groove; 330. Second voice coil; 340. First support piece; 341. First connecting part; 342. Second connecting part; 3421. First connecting segment; 3422. Second connecting segment; 343. First elastic part; 344. Adapter segment; 350. Second support piece; 351. Third connecting part; 352. Fourth connecting part; 353. Second elastic part; 400. Conductive support; 410. Main body; 420. Solder pad.

[0047] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

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

[0050] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0051] This utility model proposes a sound-generating device.

[0052] Referring to Figures 1 to 7, in one embodiment of this utility model, the sound-generating device includes:

[0053] The magnetic circuit system 200 is provided with mounting holes 203, a first magnetic gap 201 and a second magnetic gap 202 arranged sequentially from the inside to the outside.

[0054] A conductive bracket 400 is disposed in the mounting hole 203;

[0055] A vibration system 300 includes a diaphragm assembly 310, a first voice coil 320, a second voice coil 330, a first support 340, and a second support 350. The diaphragm assembly 310 is disposed opposite to the magnetic circuit system 200. One end of the first voice coil 320 is fixed to the diaphragm assembly 310, and the other end is disposed corresponding to the first magnetic gap 201. One end of the second voice coil 330 is fixed to the diaphragm assembly 310, and the other end is disposed corresponding to the second magnetic gap 202. One end of the first support 340 is fixed to the diaphragm assembly 310 and electrically connected to both the first voice coil 320 and the second voice coil 330. The other end of the first support 340 is electrically connected to the conductive support 400. Multiple second supports 350 are arranged at intervals along the circumference of the second voice coil 330.

[0056] The housing 100 connects the magnetic circuit system 200 and the diaphragm assembly 310, and the housing 100 is also connected to the second voice coil 330 via the second support 350.

[0057] In this invention, by arranging multiple voice coils, the amplitude of the vibration system 300 can be increased, thereby enhancing the loudness of the sound-generating device. The first support plate 340 is connected to the conductive bracket 400, which is located within the magnetic circuit system 200, which is relatively fixed to the outer casing 100. The second support plate 350 is connected to the second voice coil 330 and the outer casing 100, ensuring that both the outer casing 100 and the magnetic circuit system 200 provide support points for the vibration system 300. This allows the first and second support plates 340 and 350 to provide stabilizing forces for the vibration system 300, preventing swaying and polarization during large-amplitude vibrations. Furthermore, because multiple second support plates 350 are arranged circumferentially, multiple circumferentially spaced positions on the vibration system 300 receive stabilizing forces from the second support plates 350, which helps ensure the vibration stability of the vibration system 300. Based on this, the first support plate 340 is reused as an electrical connection structure, so that the first voice coil 320 and the second voice coil 330 can be electrically connected to the conductive bracket 400 through the first support plate 340, thereby realizing electrical connection with the external power supply without adding an additional electrical connection structure. In this way, the structure of the sound-generating device can be simplified, which facilitates the layout of the internal space of the sound-generating device, and also helps to reduce the size of the sound-generating device and ensure the miniaturization of the sound-generating device.

[0058] Furthermore, by placing the conductive support 400 within the mounting hole 203 of the magnetic circuit system 200, the space required for the first support plate 340 to be led out in the magnetic circuit system 200 is eliminated, thereby increasing the volume of the magnetic circuit system 200 and improving the product's BL value. In addition, due to severe magnetic leakage at the central position of the magnetic circuit system 200, the mounting hole 203 needs to be formed by removing at least a portion of the central magnet 221 in the magnetic circuit system 200. This reduces the magnetic leakage of the central magnet 221. When the sound-generating device is assembled with electronic equipment, the impact of magnetic leakage of the central magnet 221 on the performance of the electronic equipment can be reduced, meeting the electronic equipment's requirements for magnetic leakage.

[0059] It should be noted that the end of the first voice coil 320 facing away from the diaphragm assembly 310 is positioned corresponding to the first magnetic gap 201, and the end of the second voice coil 330 facing away from the diaphragm assembly 310 is positioned corresponding to the second magnetic gap 202. This means that the end of the first voice coil 320 can be inserted into the first magnetic gap 201, or it can be located above the first magnetic gap 201. Similarly, the end of the second voice coil 330 can be inserted into the second magnetic gap 202, or it can be located above the second magnetic gap 202.

[0060] In one embodiment, referring to Figures 1 to 7, the magnetic circuit system 200 includes a magnetic yoke 210 and a central magnetic circuit portion 220, a first side magnetic circuit portion 230, and a second side magnetic circuit portion 240 disposed on the same side of the magnetic yoke 210. The first side magnetic circuit portion 230 is disposed around the central magnetic circuit portion 220 and forms a first magnetic gap 201 between it and the central magnetic circuit portion 220. The second side magnetic circuit portion 240 is disposed around the first side magnetic circuit portion 230 and forms a second magnetic gap 202 with it. The second side magnetic circuit is provided with a clearance notch 243 for accommodating the second support piece 350. The mounting hole 203 passes through the magnetic yoke 210 and the central magnetic circuit portion 220. Without loss of generality, the central magnetic circuit section 220 includes a central magnet 221 and a central washer 222, the first side magnetic circuit section 230 includes a first side magnet 231 and a first side washer 232, and the second side magnetic circuit section 240 includes a second side magnet 241 and a second side washer 242.

[0061] Thus, by using the first side magnetic circuit portion 230 as a shared magnetic circuit structure for the first magnetic gap 201 and the second magnetic gap 202, the structure of the magnetic circuit system 200 is simplified, reducing the production cost of the sound-generating device and facilitating a reduction in the radial dimension of the sound-generating device. Furthermore, since the mounting hole 203 penetrates the magnetic yoke 210 and the central magnetic circuit portion 220, it facilitates the connection between the conductive support 400 and the magnetic yoke 210, allowing the conductive support 400 to form conductive positions both inside and outside the sound-generating device. The external conductive positions are used for electrical connection to an external power source, while the internal conductive positions are used for electrical connection to the first support piece 340. Of course, in other embodiments, the first magnetic gap 201 and the second magnetic gap 202 can also be constructed using two independent magnetic circuit groups. The central magnetic circuit structure of the second magnetic gap 202 can be superimposed on the side magnetic circuit structure of the first magnetic gap 201, also achieving the goal of reducing the radial dimension.

[0062] In this embodiment, the second support piece 350 can be avoided by the clearance notch 243. When the second support piece 350 is driven to move in the vibration direction of the vibration system 300, the clearance notch 243 can provide sufficient movement space for the second support piece 350, so that the second support piece 350 is not interfered with, thereby ensuring that the movement of the voice coil and diaphragm assembly 310 is not affected. Specifically, both the second side magnet 241 and the second side washer 242 are provided with clearance notches 243. In this way, the internal structure of the sound-generating device can be compactly arranged without interference. Of course, in other embodiments, the second support piece 350 and the magnetic circuit structure can be staggered.

[0063] In one embodiment, referring to Figures 1 to 8 together, the first support 340 includes a first connecting portion 341, a first elastic portion 343, and a second connecting portion 342 connected in sequence. The first connecting portion 341 is electrically connected to the conductive support 400. The second connecting portion 342 is fixed to the diaphragm assembly 310 and is electrically connected to the leads of the first voice coil 320 and the second voice coil 330. The two ends of the first elastic portion 343 are respectively connected to the first connecting portion 341 and the second connecting portion 342. Thus, the first connecting part 341 provides a stable connection structure for the conductive support 400, and the second connecting part 342 provides a stable connection structure for the leads of the first voice coil 320 and the second voice coil 330, facilitating the consistency of movement between the second connecting part 342, the first voice coil 320, the second voice coil 330, and the diaphragm assembly 310. The first elastic part 343 has the ability to deform and recover from deformation, preventing lateral displacement and unnecessary vibration of the system, thereby ensuring the clarity and accuracy of the sound quality. Of course, in other embodiments, the first support piece 340 may also include three connecting parts, which are Y-shaped and electrically connected to the first voice coil 320, the second voice coil 330, and the conductive support 400, respectively. The elastic part is located at the junction of the three connecting parts. Alternatively, the leads of the first voice coil 320 and the second voice coil 330 may also be connected to the first connecting part 341, with sufficient length reserved for the leads of the voice coil assembly.

[0064] In one embodiment, referring to Figures 1 to 8, the second connecting portion 342 includes a first connecting segment 3421 and a second connecting segment 3422. The second connecting segment 3422 is connected to the first elastic portion 343 through the first connecting segment 3421. The width of the second connecting segment 3422 is greater than the width of the first connecting segment 3421. The second connecting segment 3422 is located between the first voice coil 320 and the second voice coil 330. The leads of the first voice coil 320 and the second voice coil 330 are electrically connected to the second connecting segment 3422. Thus, the second connecting segment 3422 provides a sufficiently large connection area for the leads of the first voice coil 320 and the second voice coil 330, ensuring the stability of the electrical connection between the two voice coils and the second connecting segment 3422. Furthermore, the second connecting segment 3422, located between the first voice coil 320 and the second voice coil 330, allows for convenient electrical connection with the leads of both the first voice coil 320 and the second voice coil 330. Specifically, the first voice coil 320 has leads extending outwards, and the second voice coil 330 has leads extending inwards, so that the leads of both are located between the first voice coil 320 and the second voice coil 330, allowing for convenient and reliable connection to the second connecting segment 3422. The width of the first connecting segment 3421 is sufficient to ensure stable connection with the first voice coil 320, the second voice coil 330, and the diaphragm assembly 310. Making the width of the first connecting segment 3421 smaller can save material on the first support plate 340, thereby reducing the production cost of the sound-generating device. Of course, in other embodiments, the first connecting segment 3421 and the second connecting segment 3422 can also be of equal width.

[0065] In this embodiment, both the first connecting segment 3421 and the second connecting segment 3422 are fixed to the diaphragm 311; however, the present invention is not limited thereto. In other embodiments, only the first connecting segment 3421 or only the second connecting segment 3422 may be fixed to the diaphragm 311.

[0066] In one embodiment, referring to Figures 1 to 9, the vibration system 300 further includes a first frame 321. The first voice coil 320 is connected to the diaphragm assembly 310 through the first frame 321. A first clearance groove 3211 is provided on the surface of the first frame 321 near the diaphragm assembly 310, corresponding to the first connecting segment 3421. Thus, the position of the first voice coil 320 within the first magnetic gap 201 can be adjusted by the first frame 321, ensuring that the first voice coil 320 is located in a region with dense magnetic field lines, thereby improving the sound-generating sensitivity of the sound-generating device. By providing the first clearance groove 3211, a space is formed between the first frame 321 and the diaphragm assembly 310 for the first connecting segment 3421 to pass through. The first connecting segment 3421 passing through this space ensures that the second connecting portion 342 and the diaphragm assembly 310 remain in close contact, ensuring the connection stability of the second connecting portion 342 and the diaphragm assembly 310. This allows the first support plate 340 to stably and effectively provide stabilizing force to the vibration system 300. Furthermore, the above-mentioned arrangement allows for a more compact assembly structure between the first frame 321 and the diaphragm assembly 310, thereby increasing the vibration space of the vibration system. Alternatively, in other embodiments, the first frame 321 may have an axially penetrating notch at a corresponding position to avoid obstructing the first connecting segment 3421.

[0067] In one embodiment, referring to Figures 1, 2, and 8, the central magnetic circuit section 220 includes a central magnet 221 connected to the magnetic yoke 210 and a central washer 222 disposed at one end of the central magnet 221 near the diaphragm assembly 310. A second clearance groove 2221 is provided on the surface of the central washer 222 near the diaphragm assembly 310 corresponding to the first connecting segment 3421. Thus, the second clearance groove 2221 can avoid the first connecting segment 3421. When the first support plate 340 is driven and moves in the vibration direction of the vibration system 300, the second clearance groove 2221 can provide sufficient movement space for the first connecting segment 3421, ensuring that the first support plate 340 is not interfered with, thereby ensuring that the movement of the voice coil and the diaphragm assembly 310 is not affected. This allows the internal structure of the sound-generating device to be compactly arranged axially without interference, which is beneficial for miniaturizing the sound-generating device. Of course, in other embodiments, the distance between the central washer 222 and the first connecting segment 3421 in the vibration direction of the vibration system 300 can be increased to achieve avoidance between the two.

[0068] In one embodiment, referring to Figures 1, 2, and 8, the first side magnetic circuit portion 230 includes a first side magnet 231 connected to the magnetic yoke 210, and a first side washer 232 disposed at one end of the first side magnet 231 near the diaphragm assembly 310. The first side washer 232 has a clearance break 2321 corresponding to the second connecting segment 3422. Thus, the clearance break 2321 can avoid the second connecting segment 3422. When the first support plate 340 is driven and moves in the vibration direction of the vibration system 300, the clearance break 2321 can provide sufficient movement space for the second connecting segment 3422, ensuring that the first support plate 340 is not interfered with, thereby ensuring that the movement of the voice coil and the diaphragm assembly 310 is not affected. This allows the internal structure of the sound-generating device to be compactly arranged axially without interference, which is beneficial for miniaturizing the sound-generating device. Of course, in other embodiments, the distance between the first washer 232 and the second connecting segment 3422 in the vibration direction of the vibration system 300 can be increased to achieve avoidance between the two.

[0069] In one embodiment, the first connecting portion 341, the first elastic portion 343, and the second connecting portion 342 are integrally formed. This helps ensure the structural stability and consistency of the first support piece 340, while also facilitating its production, processing, and assembly. Of course, in other embodiments, the first connecting portion 341, the first elastic portion 343, and the second connecting portion 342 of the first support piece 340 can also be separately formed and then bonded, welded, or snapped together.

[0070] In one embodiment, referring to FIG8, the first elastic portion 343 has at least one bend. This allows the first elastic portion 343 to have a certain deformation capacity and the ability to recover from deformation, ensuring that the first elastic portion 343 can absorb vibration energy from other directions. The bend can be horizontal or along the vibration direction of the vibration system 300. Of course, in other embodiments, the first elastic portion 343 can also have other structural forms.

[0071] In one embodiment, referring to Figures 1 to 8, multiple first support plates 340 are provided, and these multiple first support plates 340 are arranged at intervals along the circumference of the conductive support 400. This enhances the stabilizing effect of the first support plates 340 on the diaphragm assembly 310, ensuring the vibration stability of the vibration system 300. Simultaneously, the electrical connection points between the first support plates 340 and the two voice coils are dispersed, preventing excessive heat concentration and ensuring the stability of the electrical connection between the first support plates 340 and the two voice coils. Of course, in other embodiments, only one first support plate 340 may be provided, and the positions of the electrical connections between the first support plate 340 and the two voice coils may be dispersed.

[0072] Without loss of generality, in the long axis direction of the magnetic circuit system 200, two first support plates 340 are symmetrically provided. One first support plate 340 has two first pads and one second pad on its second connecting segment 3422, and the other first support plate 340 has one second pad on its second connecting segment 3422. The two first pads are used to electrically connect the two leads of the first voice coil 320, and the two second pads are used to electrically connect the two leads of the second voice coil 330, respectively. However, the present invention is not limited to this. In other embodiments, the two first pads can also be provided on the second connecting segments 3422 of the two first support plates 340 respectively. That is, one first support plate 340 has one first pad and one second pad on its second connecting segment 3422, and the other first support plate 340 also has one first pad and one second pad on its second connecting segment 3422; or, one first support plate 340 has two first pads on its second connecting segment 3422, and the other first support plate 340 has two second pads on its second connecting segment 3422.

[0073] In one embodiment, the plurality of first support pieces 340 are integrally formed. This improves the structural consistency of the plurality of first support pieces 340 and facilitates their processing, forming, and assembly. Specifically, the first connecting portion 341 of the plurality of first support pieces 340 is integrally formed, and the conductive support 400 is connected to the integrally formed first connecting portion 341. The first connecting portion 341 is provided with at least two third pads to correspond to at least the positive and negative terminal connection positions of the conductive support 400. Of course, in other embodiments, the plurality of first support pieces 340 can also be separately formed and independently connected to the conductive support 400.

[0074] In one embodiment, the main body of the first support piece 340 is made of an insulating material, and conductive lines are provided on the insulating material. Both the first voice coil 320 and the second voice coil 330 are electrically connected to the conductive support 400 through the conductive lines. Thus, the first voice coil 320 and the second voice coil 330 can be stably and reliably electrically connected to the conductive support 400 through the conductive lines on the first support piece 340, ensuring the working performance of the sound-generating device. Of course, in other embodiments, the main body of the first support piece 340 may also be made of a conductive material, with an insulating film layer covering the outer surface of the first support piece 340.

[0075] Optionally, the insulating material used for the main body of the first sheet 340 is a composite material, which combines the advantages of multiple materials to give the main body of the first sheet 340 sufficient hardness and strength, enabling the first sheet 340 to stably and reliably provide stabilizing force for the vibration system 300. Specifically, it can be glass fiber reinforced plastic, with epoxy resin, polyester resin, etc. as the matrix material and glass fiber as the reinforcing material; it can also be carbon fiber reinforced plastic, with epoxy resin, bismaleimide, etc. as the matrix material and carbon fiber as the reinforcing material; it can also be aramid fiber reinforced plastic, with epoxy resin, phenolic resin, etc. as the matrix material and aramid fiber as the reinforcing material; or it can be a glass cloth laminate, with epoxy resin as the matrix material and glass fiber cloth as the reinforcing material. Of course, in other embodiments, the insulating material used for the main body of the first sheet 340 can also be a single material, such as engineering plastic or rubber.

[0076] In one embodiment, referring to Figures 1 to 3, the second side magnetic circuit portion 240 is formed into a square structure, with clearance notches 243 provided at each of the four corners. Four second support plates 350 are correspondingly disposed within the respective clearance notches 243. This facilitates the layout of the internal components of the sound-generating device, allowing for compact and non-interfering cooperation between components, which is beneficial for the miniaturization design of the sound-generating device. Furthermore, the four second support plates 350 can act relatively evenly on the second voice coil 330 in the circumferential direction, thereby ensuring the vibration stability of the vibration system 300. Specifically, the second side magnet 241 and the second side washer 242 are correspondingly formed with clearance notches 243. Of course, in other embodiments, the second side magnetic circuit can also be annular or quasi-annular.

[0077] In one embodiment, the first side magnetic circuit portion 230 is formed as a closed ring structure, and the second side magnetic circuit portion 240 includes a plurality of spaced second side magnets 241, with the avoidance gap 243 defined between adjacent second side magnets 241.

[0078] For the first side magnetic circuit section 230, the first side magnet 231 can be configured as a continuous circumferential structure, or multiple first side magnets 231 can be provided and discontinuously distributed along the circumference, and compactly arranged in a ring shape, with a small interval between each two adjacent first side magnets 231. This allows the first side magnetic circuit section 230 to have a compact layout in the circumferential direction, forming a structure similar to a closed ring. At the same time, the length of the first side magnets 231 is controlled to facilitate the manufacturing and processing of the first side magnets 231. The break provided on the first side washer 232 can provide sufficient clearance for the first support plate 340, making full use of the circumferential space and maximizing the volume of the first side magnets 231 to ensure the magnetic field strength of the first magnetic gap 201 and the second magnetic gap 202, thereby ensuring the sound production performance of the sound generating device. Of course, in other embodiments, provided that the magnetic field strength of the first side magnetic circuit section 230 is sufficient, the interval between the multiple magnets included in the first side magnet 231 can also be set to be larger.

[0079] For the second side magnetic circuit section 240, second side magnets 241 are distributed differently in at least the long axis direction and the short axis direction. The second side magnets 241 in the long axis direction and the short axis direction are arranged with a large interval to form clearance gaps 243 at the four corners of the second side magnetic circuit section 240. Furthermore, on each side in the long axis direction, multiple second side magnets 241 arranged in sequence can be correspondingly arranged so that the second side magnets 241 have a suitable length to facilitate the production and processing of the second side magnets 241. The interval between multiple second side magnets 241 arranged on the same long axis side can be slightly smaller to make them arranged compactly, which is beneficial to ensuring the magnetic field strength of the second side magnetic circuit section 240. Of course, in other embodiments, the first side magnet 231 may have a circumferential continuous structure, and clearance gaps 243 may be formed by recessing at the corner positions facing the diaphragm assembly 310 towards the magnetic yoke 210.

[0080] In one embodiment, the magnetic yoke 210 and the conductive support 400 are integrally injection molded. Specifically, referring to Figure 7, the conductive support 400 includes a main body 410 and pads 420. The main body 410 is connected to the magnetic yoke 210, and the pads 420 are embedded in the main body 410. The pads have exposed conductive positions on opposite sides of the magnetic yoke 210. The conductive positions exposed outside the sound-generating device are used for external power supply connection, and the conductive positions exposed inside the sound-generating device are used for connection to the first connecting part 341. The main body 410 can be made of plastic, allowing the magnetic yoke 210 and the conductive support 400 to be integrally injection molded, thereby eliminating the assembly process of the magnetic yoke 210 and the conductive support 400 and improving the connection stability of the magnetic yoke 210 and the conductive support 400. Of course, in other embodiments, the magnetic yoke 210 and the conductive support 400 can also be separately molded and then assembled into one piece.

[0081] In one embodiment, referring to Figures 1 to 4, the second support piece 350 includes a third connecting portion 351, a second elastic portion 353, and a fourth connecting portion 352 connected in sequence. The third connecting portion 351 is connected to the second voice coil 330, and the fourth connecting portion 352 is connected to the outer casing 100. The second elastic portion 353 has at least one bend. Thus, the second elastic portion 353 has a certain deformation capacity and the ability to recover from deformation, ensuring that the second elastic portion 353 can absorb vibration energy from other directions and prevent lateral displacement and unnecessary vibration of the vibration system 300. The bend in the second elastic portion 353 can be bent horizontally or along the vibration direction of the vibration system 300. Of course, in other embodiments, the second support piece 350 can also have other structural forms.

[0082] In one embodiment, the second support plate 350 is made of one of the following materials: rubber, elastomer, metal, or engineering plastic. The metal can be stainless steel, spring steel, or aluminum alloy; the elastomer can be polyurethane, polyester, etc.; and the engineering plastic can be nylon, polyoxymethylene, polyimide, or polytetrafluoroethylene. This ensures the structural stability of the second support plate 350 while also providing sufficient deformation and recovery capabilities, enabling it to reliably provide stabilizing force to the vibration system 300. Of course, in other embodiments, the second support plate 350 can also be made of other suitable materials.

[0083] In one embodiment, referring to Figures 1, 5 to 7, the diaphragm assembly 310 includes:

[0084] A diaphragm 311 is disposed opposite to the magnetic circuit system 200, and an inner ring hole 3111 is provided in the center of the diaphragm 311.

[0085] A frame 312 is disposed in the inner annular hole 3111 and connected to the diaphragm 311. The first support plate 340 is connected to the frame 312. The frame 312 has an assembly hole 3121 corresponding to the conductive support 400.

[0086] A dome 313 is provided to cover the mounting hole 3121;

[0087] Both the first voice coil 320 and the second voice coil 330 are connected to the frame 312.

[0088] In this embodiment, the diaphragm assembly 310 is configured as a three-part structure consisting of a diaphragm 311, a frame 312, and a dome 313. The periphery of the diaphragm 311 is connected to the outer shell 100, and an inner ring hole 3111 is formed in the center of the diaphragm 311. The frame 312 is positioned at the inner ring hole 3111, thereby connecting and fixing the voice coil and the first support plate 340, improving installation stability. Simultaneously, by providing mounting holes 3121 corresponding to the conductive bracket 400 on the frame 312, the first support plate 340 can be easily positioned and installed using the mounting holes 3121, allowing the first support plate 340 to be connected and fixed to the conductive bracket 400 and the frame 312, improving installation convenience.

[0089] Understandably, in order to seal the assembly hole 3121, a dome 313 is provided at the assembly hole 3121, so that the dome 313 covers the assembly hole 3121. This can both seal the assembly hole 3121 and ensure the vibration performance of the diaphragm assembly 310.

[0090] In one embodiment, please refer to Figures 7 and 11 together. The frame 312 is also provided with a connecting flange 3122 extending toward the mounting hole 203 near the mounting hole 3121. The side of the first support piece 340 away from the conductive support 400 is connected to the connecting flange 3122.

[0091] In this embodiment, by providing a connecting flange 3122 on the frame 312, the connecting flange 3122 extends toward the mounting hole 203, so that the first support piece 340 can be further fixed by the connecting flange 3122, thereby improving the connection stability of the first support piece 340.

[0092] Referring to Figures 6 to 8, the first support plate 340 further includes a transition section 344 that is bent and connected to both the second connecting portion 342 and the first elastic portion 343. The transition section 344 extends along the vibration direction of the diaphragm assembly 310. This allows for a height difference between the second connecting portion 342 and the first elastic portion 343 in the vibration direction of the diaphragm assembly 310, facilitating connection between the first connecting portion 341 and the conductive support 400 on the magnetic circuit system 200. Simultaneously, the transition section 344 allows the second connecting portion 342 and the first elastic portion 343 to be located on different horizontal planes, enabling them to center the vibration system 300 from different positions, thereby improving the vibration stability of the vibration system 300. Of course, in other embodiments, a portion of the first elastic portion 343 or the second connecting portion 342 may extend along the vibration direction of the diaphragm assembly 310.

[0093] Specifically, the connecting flange 3122 can be fitted and connected to the transition section 344 of the first support piece 340, thereby facilitating the positioning and assembly of the first support piece 340 and the frame 312, and enabling the frame 312 to provide support for the transition section 344 of the first support piece 340, which is beneficial to improving the structural stability of the first support piece 340.

[0094] Optionally, the connecting flange 3122 is formed by bending or stretching one side of the skeleton 312 adjacent to the mounting hole 3121. For example, the connecting flange 3122 is formed as a vertically extending structure extending from one sidewall of the skeleton 312 adjacent to the mounting hole 3121 along the vibration direction (vertical direction) of the vibration system 300. This configuration can effectively improve the structural strength and processing convenience of the connecting flange 3122. Of course, in other embodiments, the connecting flange 3122 and the skeleton 312 can also be separately configured and connected into an integral structure by welding or bonding, which is not limited here.

[0095] Optionally, the connecting flange 3122 is arranged in a ring shape to facilitate the connection and fixation of the adapter sections 344 of multiple first support pieces 340, thereby improving installation convenience.

[0096] Optionally, multiple connecting flanges 3122 are provided, spaced apart along the periphery of the mounting hole 3121. Each connecting flange 3122 includes two first bosses 3123 protruding towards the inner periphery of the mounting hole 3121, and a second boss 3124 connected between the two first bosses 3123 and protruding towards the outer periphery of the mounting hole 3121. The transition section 344 of the second connecting portion 342 is fitted and connected to the second boss 3124. This helps to improve the structural stability of the connecting flange 3122, thereby enhancing the support capacity of the connecting flange 3122 for the transition section 344. Without loss of generality, two connecting flanges 3122 are provided, respectively corresponding to the major axis direction or the minor axis direction of the magnetic circuit system 200.

[0097] It should be noted that the specific structural design of the connecting flange 3122 is not limited to the situation described above. As long as the installation and fixation of the first support piece 340 can be achieved, this utility model does not impose any specific restrictions on it.

[0098] This utility model also proposes an electronic device, which includes a sound-generating device. The specific structure of the sound-generating device is as described in the above embodiments. Since this electronic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. Optionally, the electronic device can be headphones, mobile phones, televisions, computers, tablets, smart wearable devices, etc., and is not limited thereto.

[0099] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using 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, include: The magnetic circuit system is provided with mounting holes, a first magnetic gap, and a second magnetic gap arranged sequentially from the inside to the outside; A conductive bracket is disposed in the mounting hole; A vibration system includes a diaphragm assembly, a first voice coil, a second voice coil, a first support plate, and a second support plate. The diaphragm assembly is disposed opposite to the magnetic circuit system. One end of the first voice coil is fixed to the diaphragm assembly, and the other end is disposed corresponding to the first magnetic gap. One end of the second voice coil is fixed to the diaphragm assembly, and the other end is disposed corresponding to the second magnetic gap. One end of the first support plate is fixed to the diaphragm assembly and electrically connected to both the first and second voice coils. The other end of the first support plate is electrically connected to the conductive support. Multiple second support plates are spaced apart along the circumference of the second voice coil. The housing connects the magnetic circuit system and the diaphragm assembly, and the housing is also connected to the second voice coil via the second support plate.

2. The sound-generating device as described in claim 1, characterized in that, The magnetic circuit system includes a magnetic yoke and a central magnetic circuit portion, a first side magnetic circuit portion, and a second side magnetic circuit portion disposed on the same side of the magnetic yoke. The first side magnetic circuit portion is disposed around the central magnetic circuit portion and forms a first magnetic gap with the central magnetic circuit portion. The second side magnetic circuit portion is disposed around the first side magnetic circuit portion and forms a second magnetic gap with the first side magnetic circuit portion. The second side magnetic circuit portion is provided with a clearance notch for accommodating the second support piece. The mounting hole passes through the magnetic yoke and the central magnetic circuit portion.

3. The sound-generating device as described in claim 2, characterized in that, The first support includes a first connecting part, a first elastic part, and a second connecting part connected in sequence. The first connecting part is electrically connected to the conductive support. The second connecting part is fixed to the diaphragm assembly and electrically connected to the leads of the first voice coil and the second voice coil. The two ends of the first elastic part are respectively connected to the first connecting part and the second connecting part.

4. The sound-generating device as described in claim 3, characterized in that, The second connecting part includes a first connecting segment and a second connecting segment. The second connecting segment is connected to the first elastic part through the first connecting segment. The width of the second connecting segment is greater than the width of the first connecting segment. The second connecting segment is located between the first voice coil and the second voice coil. The leads of the first voice coil and the second voice coil are electrically connected to the second connecting segment.

5. The sound-generating device as described in claim 4, characterized in that, The vibration system further includes a first frame, the first voice coil being connected to the diaphragm assembly via the first frame, and the surface of the first frame near the diaphragm assembly having a first clearance groove corresponding to the first connecting section; and / or The central magnetic circuit section includes a central magnet connected to the magnetic yoke, and a central washer disposed at one end of the central magnet near the diaphragm assembly. The surface of the central washer near the diaphragm assembly has a second clearance groove corresponding to the first connecting section; and / or The first side magnetic circuit section includes a first side magnet connected to the magnetic yoke, and a first side washer disposed at one end of the first side magnet near the diaphragm assembly. The first side washer has an avoidance break corresponding to the second connecting section; and / or The first connecting portion, the first elastic portion, and the second connecting portion are integrally formed; and / or The first elastic portion has at least one bend.

6. The sound-generating device as claimed in claim 1, characterized in that, The first support piece is provided in multiple ways, and the multiple first support pieces are arranged at intervals along the circumference of the conductive bracket; And / or, multiple first pieces are integrally formed structures; And / or, the main body of the first support piece is made of insulating material, and conductive lines are provided on the insulating material, and the first voice coil and the second voice coil are both electrically connected to the conductive support through the conductive lines.

7. The sound-generating device as described in claim 2, characterized in that, The second side magnetic circuit portion is formed into a square structure, and the four corners of the second side magnetic circuit portion are provided with the clearance notch. There are four second support pieces, which are arranged one-to-one in the corresponding clearance notch. And / or, the first side magnetic circuit portion is formed as a closed ring structure, and the second side magnetic circuit portion includes a plurality of second side magnets arranged at intervals, with the avoidance gap defined between adjacent second side magnets; And / or, the magnetic yoke and the conductive support are integrally injection molded; And / or, the second support includes a third connecting portion, a second elastic portion and a fourth connecting portion connected in sequence, the third connecting portion being connected to the second voice coil, the fourth connecting portion being connected to the housing, and the second elastic portion having at least one bend.

8. The sound-generating device as claimed in claim 1, characterized in that, The second piece is made of one of the following materials: rubber, elastomer, metal, or engineering plastic.

9. The sound-generating device according to any one of claims 1 to 8, characterized in that, The diaphragm assembly includes: A diaphragm is disposed opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm; The skeleton is disposed in the inner annular hole and connected to the diaphragm; the first support plate is connected to the skeleton; and the skeleton has mounting holes corresponding to the conductive bracket. A spherical dome, wherein the spherical dome is disposed at the assembly hole; Both the first voice coil and the second voice coil are connected to the skeleton.

10. The sound-generating device as claimed in claim 9, characterized in that, The frame is provided with a connecting flange extending from the edge of the mounting hole toward the mounting hole. The first support plate includes a first connecting part, a first elastic part and a second connecting part connected in sequence. The first connecting part is electrically connected to the conductive bracket. The second connecting part is fixed to the diaphragm assembly and electrically connected to the leads of the first voice coil and the second voice coil. The two ends of the first elastic part are respectively connected to the first connecting part and the second connecting part. A transition section extending along the vibration direction of the diaphragm assembly is provided between the second connecting part and the first elastic part. The transition section is fitted and connected to the connecting flange.

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

Images