Sound production device and acoustic equipment

Abstract

The utility model discloses a sounding device and acoustic equipment. The sound production device comprises a support, a magnetic circuit unit and a vibration unit. The magnetic circuit unit is connected with the support, the magnetic circuit unit comprises a magnet yoke, a center magnetic circuit and an edge magnetic circuit, the magnet yoke is provided with a center yoke plate, an edge yoke plate and a connecting plate, a first magnetic gap is formed between the center magnetic circuit and the inner side of the connecting plate, and a second magnetic gap is formed between the edge magnetic circuit and the outer side of the connecting plate; the vibration unit comprises a first vibration assembly and a second vibration assembly, one part of the first vibration assembly is located in the first magnetic gap, and one part of the second vibration assembly is located in the second magnetic gap; wherein a plurality of positioning holes are formed in the connecting area of the central yoke plate and the connecting plate and / or the connecting area of the side yoke plate and the connecting plate, and the plurality of positioning holes are uniformly distributed along the circumference. The sounding device disclosed by the utility model is low in assembly difficulty.

Description

Technical Field

[0001] The utility model belongs to the technical field of acoustics, and specifically relates to a sound-generating device and an acoustic equipment. Background Art

[0002] During the assembly process of traditional dual-diaphragm sound-generating devices, the concentricity requirements of each component in the vibration system and magnetic circuit system of the product make it difficult to assemble using conventional assembly processes. Utility Model Content

[0003] One purpose of the embodiments of the utility model is to provide a new technical solution for a sound-generating device and an acoustic device.

[0004] According to a first aspect of the present invention, there is provided a sound generating device, comprising:

[0005] Bracket;

[0006] A magnetic circuit unit, the magnetic circuit unit is connected to the bracket, the magnetic circuit unit includes a yoke, a central magnetic circuit and a side magnetic circuit, the magnetic yoke has a central yoke plate, a side yoke plate and a connecting plate, the side yoke plate is located on the outer side of the central yoke plate and is connected to the central yoke plate through the connecting plate, the central magnetic circuit is arranged on the central yoke plate and forms a first magnetic gap with the inner side of the connecting plate, the side magnetic circuit is arranged on the side yoke plate and forms a second magnetic gap with the outer side of the connecting plate;

[0007] A vibration unit, the vibration unit comprising a first vibration component and a second vibration component, the first vibration component and the second vibration component are respectively connected to the bracket, the first vibration component comprises a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component comprises a second diaphragm and a second voice coil connected to the second diaphragm, at least a portion of the first voice coil is located in the first magnetic gap, and at least a portion of the second voice coil is located in the second magnetic gap;

[0008] Wherein, a connection area between the central yoke plate and the connection plate and / or a connection area between the side yoke plate and the connection plate is provided with a plurality of positioning holes, and the plurality of positioning holes are evenly distributed along the circumference.

[0009] Optionally, three positioning holes are provided.

[0010] Optionally, a side of the first vibration component facing away from the second vibration component forms a first front cavity, and a side of the second vibration component facing away from the first vibration component forms a second front cavity;

[0011] The bracket has a top surface, a bottom surface, and side surfaces, and sound outlet holes are provided on the side surfaces. Among them, in a direction perpendicular to the vibration direction of the vibration unit, at least part of the sound outlet holes correspond to the magnetic circuit unit. A first channel that penetrates the top surface and communicates the first front cavity and the sound outlet holes, and a second channel that penetrates the bottom surface and communicates the second front cavity and the sound outlet holes are provided on the bracket.

[0012] Optionally, the bracket includes a first bracket and a second bracket, and the first bracket and the second bracket are connected relatively.

[0013] One side of the first bracket away from the second bracket forms the top surface of the bracket, the first vibration assembly is connected to the top surface, one side of the second bracket away from the first bracket forms the bottom surface of the bracket, the second vibration assembly is connected to the bottom surface, and the sound outlet holes are provided between the first bracket and the second bracket.

[0014] Optionally, the sound generating device further includes an upper cover and a lower cover. The upper cover is connected to the top surface and forms a first front cavity with the first vibration assembly. The lower cover is connected to the bottom surface and forms a second front cavity with the second vibration assembly. The upper cover has a first convex portion facing away from the bracket, and the lower cover has a second convex portion facing away from the bracket. At least part of the first convex portion corresponds to the first channel, and at least part of the second convex portion corresponds to the second channel.

[0015] Optionally, the bracket includes a circular portion and an extension portion protruding from the circular portion. The first vibration assembly and the second vibration assembly are both connected to the circular portion, and the first channel and the second channel are both provided in the extension portion.

[0016] And / or, the first channel and the second channel communicate in a direction along the vibration direction of the vibration unit.

[0017] Optionally, the bracket, the first vibration assembly, and the second vibration assembly enclose a rear cavity. Leakage holes communicating with the outside of the sound generating device are provided on the side surface of the bracket. The rear cavity communicates with the leakage holes and is separated from the first front cavity and the second front cavity.

[0018] Optionally, when the sound generating device generates sound, the first vibration assembly and the second vibration assembly radiate a first sound wave with the same phase to the outside of the sound generating device through the sound outlet holes, and the first vibration assembly and the second vibration assembly radiate a second sound wave with a phase opposite to that of the first sound wave to the outside of the sound generating device through the leakage holes.

[0019] According to a second aspect of the present utility model, there is provided an acoustic device including the sound generating device described in the first aspect.

[0020] Optionally, the acoustic device further includes a housing, on which there are provided an external leakage hole and an external sound hole. There are provided a sound outlet hole and a leakage hole on the side surface of the bracket. The sound outlet hole is disposed opposite to and communicated with the external sound hole, and the leakage hole is communicated with the external leakage hole;

[0021] A first front cavity is formed on the side of the first vibration assembly facing away from the second vibration assembly, and a second front cavity is formed on the side of the second vibration assembly facing away from the first vibration assembly. A rear cavity is formed by enclosing the first vibration assembly, the second vibration assembly, the bracket and the magnetic circuit unit;

[0022] Both the first front cavity and the second front cavity are communicated with the external sound hole through the sound outlet hole, the rear cavity is communicated with the external leakage hole through the leakage hole, and the external leakage hole and the external sound hole are respectively communicated with the outside of the acoustic device.

[0023] One technical effect of the present utility model lies in:

[0024] By providing a plurality of positioning holes in the connection area between the central yoke plate and the connection plate and / or the connection area between the side yoke plate and the connection plate, and making the plurality of positioning holes evenly distributed along the circumference, the present utility model improves the positioning accuracy of the magnetic circuit unit and the vibration unit and reduces the assembly difficulty.

[0025] Other features and advantages of the present utility model will become clear through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present utility model and, together with the description thereof, are used to explain the principles of the present utility model.

[0027] Figure 1 A perspective view of a sound generating device provided for an embodiment of the present utility model;

[0028] Figure 2 One of the cross-sectional views of a sound generating device provided for an embodiment of the present utility model;

[0029] Figure 3 A schematic structural view of a magnetic yoke provided for an embodiment of the present utility model;

[0030] Figure 4 A front view of a sound generating device provided for an embodiment of the present utility model.

[0031] Figure 5The second cross-sectional view of a sound generating device provided by an embodiment of the present utility model;

[0032] Figure 6 The structural schematic diagram of a bracket provided by an embodiment of the present utility model.

[0033] Figure 7 The three-dimensional view of an acoustic device provided by an embodiment of the present utility model;

[0034] Figure 8 The cross-sectional view of an acoustic device provided by an embodiment of the present utility model.

[0035] Wherein: 1. Bracket; 11. First bracket; 12. Second bracket; 13. Sound outlet hole; 14. Leakage hole; 15. Circular part; 16. Extension part; 17. First channel; 18. Second channel; 2. Magnetic circuit unit; 21. Central magnetic circuit; 22. Yoke; 221. Central yoke plate; 222. Side yoke plate; 223. Connecting plate; 224. Positioning hole; 23. Side magnetic circuit; 3. Vibration unit; 31. First vibration component; 311. First voice coil; 312. First diaphragm; 32. Second vibration component; 321. Second voice coil; 322. Second diaphragm; 4. Upper cover; 41. First convex part; 5. Lower cover; 51. Second convex part.

[0036] 100. Outer shell; 101. External sound outlet hole; 102. External leakage hole. Detailed implementation manners

[0037] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present utility model.

[0038] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0039] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0040] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0041] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] It should be noted that like reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0043] As Figures 1 to 6 shown, according to the first aspect of the present invention, there is provided a sound generating device, comprising: a bracket 1, a magnetic circuit unit 2 and a vibration unit 3; the magnetic circuit unit 2 is connected to the bracket 1, the magnetic circuit unit 2 includes a magnetic yoke 22, a central magnetic circuit 21 and a side magnetic circuit 23, the magnetic yoke 22 has a central yoke plate 221, a side yoke plate 222 and a connecting plate 223, the side yoke plate 222 is located outside the central yoke plate 221 and is connected to the central yoke plate 221 through the connecting plate 223, the central magnetic circuit 21 is disposed on the central yoke plate 221 and forms a first magnetic gap with the inner side of the connecting plate 223, and the side magnetic circuit 23 is disposed on the side yoke plate 222 and forms a second magnetic gap with the outer side of the connecting plate 223.

[0044] In the above structure, the double magnetic gap structure formed by the assembly and connection relationships of the various parts of the magnetic circuit unit 2 not only effectively utilizes the layout space, but also enhances the complexity and flexibility of the magnetic field, helps to reduce distortion, improves the clarity and layering of the sound, and thus improves the sound generating effect of the sound generating device.

[0045] The vibration unit 3 includes a first vibration assembly 31 and a second vibration assembly 32. The first vibration assembly 31 and the second vibration assembly 32 are respectively connected to the bracket 1. The first vibration assembly 31 includes a first diaphragm 312 and a first voice coil 311 connected to the first diaphragm 312. The second vibration assembly 32 includes a second diaphragm 322 and a second voice coil 321 connected to the second diaphragm 322. At least a part of the first voice coil 311 is located in the first magnetic gap, and at least a part of the second voice coil 321 is located in the second magnetic gap. Wherein, a plurality of positioning holes 224 are provided in the connection area between the central yoke plate 221 and the connection plate 223 and / or the connection area between the side yoke plate 222 and the connection plate 223, and the plurality of positioning holes 224 are evenly distributed along the circumference.

[0046] In the above structure, the first vibration assembly 31 and the second vibration assembly 32 can vibrate up and down in the vertical direction as shown in Figure 2 The first magnetic gap and the second magnetic gap are respectively formed on the upper and lower sides of the magnetic circuit unit 2. The annular first magnetic gap is located inside the annular second magnetic gap.

[0047] Among them, the first diaphragm 312 in the first vibration assembly 31 is located on the upper side of the magnetic circuit unit 2. The top side of the first voice coil 311 is connected to the first diaphragm 312, and the bottom side of the first voice coil 311 is suspended and extends into the first magnetic gap, so that the first voice coil 311 can vibrate up and down under the action of the magnetic field change in the first magnetic gap, ensuring the vibration efficiency of the first vibration assembly 31. The second diaphragm 322 in the second vibration assembly 32 is located on the lower side of the magnetic circuit unit 2. The bottom side of the second voice coil 321 is connected to the second diaphragm 322, and the top side of the second voice coil 321 is suspended and extends into the second magnetic gap, so that the second voice coil 321 can vibrate up and down under the action of the magnetic field change in the second magnetic gap, ensuring the vibration efficiency of the second vibration assembly 32.

[0048] At least a part of the first voice coil 311 of the first vibration assembly 31 of the vibration unit 3 is located in the first magnetic gap, and at least a part of the second voice coil 321 of the second vibration assembly 32 is located in the second magnetic gap, so that the vibration unit 3 can directly receive the drive of the magnetic field in each magnetic gap, thereby improving the energy conversion efficiency, reducing the loss in the energy transfer process, and making the sound output more efficient. In addition, the first vibration assembly 31 and the second vibration assembly 32 are respectively independently driven by the internal magnetic fields in different magnetic gaps, which helps to improve the sound separation and stereoscopic effect, and ensure the continuity and stability of the sound output, further improving the sound quality.

[0049] Furthermore, in this embodiment, since the first vibration unit 3 and the second vibration unit 3 are respectively arranged on both sides of the magnetic circuit unit 2 and cooperate with the magnetic circuit unit 2, there are relatively high assembly requirements for the concentricity among the first vibration unit 3, the second vibration unit 3, and the magnetic circuit unit 2, that is, the positions of the first voice coil 311 and the second voice coil 321 in the first magnetic gap and the second magnetic gap respectively affect the vibration effects of the vibration components on both sides. And in this application, by arranging a plurality of positioning holes 224 in the connection area between the central yoke plate 221 and the connecting plate 223 of the yoke 22 or in the connection area between the side yoke plate 222 and the connecting plate 223, it is convenient to adjust the positions of the first voice coil 311 and the second voice coil 321 at any time, making the positioning of the first voice coil 311 and the second voice coil 321 more accurate, so as to reduce the assembly difficulty of the sound generating device and improve its sound quality. Among them, a plurality of positioning holes 224 are evenly arranged along the circumference, which is convenient to adjust the assembly positions of the first vibration component 31 and the second vibration component 32 from multiple positions, so as to further improve the positioning accuracy and the sound quality of the sound generating device.

[0050] Furthermore, the positions of the plurality of positioning holes 224 can also extend from the side yoke plate 222 to the central yoke plate 221 respectively, that is, each positioning hole 224 can extend to both the connection area between the central yoke plate 221 and the connecting plate 223 and the connection area between the side yoke plate 222 and the connecting plate 223 at the same time, so that each positioning hole 224 can adapt to the positioning between the vibration unit 3 and the magnetic circuit unit 2 of various different specifications.

[0051] Optionally, as Figure 3 shown, three positioning holes 224 are provided.

[0052] Specifically, in this embodiment, too many positioning holes 224 will affect the magnetic conduction effect of the yoke 22, and too few will result in a relatively high positioning and assembly difficulty of the vibration unit 3. In this embodiment, three positioning holes 224 are evenly arranged in the circumferential direction of the yoke plate, which neither affects the magnetic conduction effect of the yoke 22 nor is inconvenient for the positioning and assembly of the magnetic circuit unit 2 and the vibration unit 3.

[0053] Optionally, as Figure 5 shown, a first front cavity is formed on the side of the first vibration component 31 facing away from the second vibration component 32, and a second front cavity is formed on the side of the second vibration component 32 facing away from the first vibration component 31; the bracket 1 has a top surface, a bottom surface, and a side surface, and the side surface is provided with a sound outlet hole 13. Among them, in the direction perpendicular to the vibration direction of the vibration unit 3, at least part of the sound outlet hole 13 corresponds to the magnetic circuit unit 2, and a first channel 17 is provided on the bracket 1 that penetrates the top surface and communicates the first front cavity and the sound outlet hole 13, and a second channel 18 that penetrates the bottom surface and communicates the second front cavity and the sound outlet hole 13.

[0054] Specifically, in this embodiment, a first front cavity is formed on the side of the first vibration assembly 31 facing away from the second vibration assembly 32, and a second front cavity is formed on the side of the second vibration assembly 32 facing away from the first vibration assembly 31. The side surface of the bracket 1 is adjacent between the top surface and the bottom surface. The sound outlet hole 13 is provided on the side surface of the bracket 1. The first channel 17 and the second channel 18 respectively penetrate through the top surface and the bottom surface of the bracket 1 and communicate with the sound outlet hole 13, so that the sound outlet structure of the sound generating device is completed by using the bracket 1 itself, without additionally adding components to set the first channel 17 and the second channel 18, reducing the axial and radial dimensions of the sound generating device. The axial direction of the sound generating device can be the vibration direction of the vibration unit 3, and the radial direction of the sound generating device can be perpendicular to the vibration direction of the vibration unit 3, making the structure of the sound generating device simpler and more compact, and facilitating the miniaturization setting of the sound generating device.

[0055] In this embodiment, the first vibration assembly 31 and the second vibration assembly 32 can vibrate up and down in the vertical direction as shown in Figure 2 or Figure 5 so that the first vibration assembly 31 and the second vibration assembly 32 cooperate with the magnetic circuit unit 2 on the opposite sides of the magnetic circuit unit 2 to facilitate the generation of acoustic vibrations in the first front cavity and the second front cavity.

[0056] At least part of the sound outlet hole 13 is opposite to the magnetic circuit unit 2 in the direction perpendicular to the vibration direction of the vibration unit 3. For example, Figure 5 at least part of the sound outlet hole 13 is opposite to the magnetic circuit unit 2 in the horizontal direction as shown in

[0057] That is, the sound outlet hole 13 can be arranged at a position opposite to the area between the first vibration assembly 31 and the second vibration assembly 32, so as to facilitate the rapid transmission of the acoustic vibrations generated in the two front cavities outside the first vibration assembly 31 and outside the second vibration assembly 32 to the sound outlet hole 13 and converge and sound at the sound outlet hole 13, improving the sound generation efficiency and sound generation intensity of the sound generating device.

[0057] Optionally, as shown in Figures 1 to 5 the bracket 1 includes a first bracket 11 and a second bracket 12, and the first bracket 11 and the second bracket 12 are connected relatively; the side of the first bracket 11 away from the second bracket 12 forms the top surface of the bracket 1, the first vibration assembly 31 is connected to the top surface, the side of the second bracket 12 away from the first bracket 11 forms the bottom surface of the bracket 1, the second vibration assembly 32 is connected to the bottom surface, and the sound outlet hole 13 is arranged between the first bracket 11 and the second bracket 12.

[0058] Specifically, in this embodiment, the bracket 1 includes a first bracket 11 and a second bracket 12 that are butt-jointed with each other, so that in the actual assembly process, the structures of the upper half or the lower half of the sound generating device can be assembled first, and then the butt-joint assembly can be carried out. The first vibration assembly 31 is connected to the top surface of the first bracket 11 of the bracket 1, and the second vibration assembly 32 is connected to the bottom surface of the second bracket 12, which facilitates the assembly of the magnetic circuit unit 2 and the vibration unit 3 inside the bracket 1 and simplifies the assembly difficulty of the entire sound generating device.

[0059] Wherein, a first notch is formed on one side of the first bracket 11 close to the second bracket 12, and the first notch extends to the side surface of the first bracket 11. A second notch is formed on one side of the second bracket 12 close to the first bracket 11, and the second notch extends to the side surface of the second bracket 12. The side surfaces of the first bracket 11 and the second bracket 12 together form the side surface of the bracket 1, that is, both the first notch and the second notch extend to the side surface of the bracket 1. In this embodiment, the first notch and the second notch are opposite to each other up and down, and then enclose to form a sound hole 13, which facilitates the transmission of the sound wave vibrating in the front cavity outside the first bracket 11 and the second bracket 12 to the sound hole 13.

[0060] Optionally, as Figures 1 to 2 and Figure 4 and Figure 5 shown, the sound generating device further includes an upper cover 4 and a lower cover 5. The upper cover 4 is connected to the top surface and forms a first front cavity with the first vibration assembly 31. The lower cover 5 is connected to the bottom surface and forms a second front cavity with the second vibration assembly 32. The upper cover 4 has a first convex portion 41 facing away from the bracket 1, and the lower cover 5 has a second convex portion 51 facing away from the bracket 1. At least part of the first convex portion 41 corresponds to the first channel 17, and at least part of the second convex portion 51 corresponds to the second channel 18.

[0061] Specifically, the upper cover 4 is connected to the top surface of the bracket 1, so that the upper cover 4 can surround part of the first vibration assembly 31 and the first bracket 11, ensuring the sealing performance when the sound wave in the first front cavity is transmitted to the outside of the sound generating device; the lower cover 5 is connected to the bottom surface of the bracket 1, so that the lower cover 5 can surround part of the second vibration assembly 32 and the second bracket 12, ensuring the sealing performance when the sound wave in the second front cavity is transmitted to the outside of the sound generating device, avoiding sound leakage when the sound generating device emits sound, and having a simple structure, improving the compactness of the device.

[0062] Further, the area of the upper cover 4 close to the bracket 1 bulges outwards to form a first outward convex portion 41 away from the bracket 1 on the upper cover 4, increasing the conveying space between the first front cavity and the first channel 17 and ensuring the efficiency of sound wave transmission from the first front cavity to the first channel 17. The area of the lower cover 5 close to the bracket 1 bulges outwards to form a second outward convex portion 51 away from the bracket 1 on the lower cover 5, increasing the conveying space between the second front cavity and the second channel 18 and ensuring the efficiency of sound wave transmission from the second front cavity to the second channel 18.

[0063] Optionally, as Figure 6 shown, the bracket 1 includes a circular portion 15 and an extension portion 16 protruding from the circular portion 15. The first vibration assembly 31 and the second vibration assembly 32 are both connected to the circular portion 15, and the first channel 17 and the second channel 18 are both provided in the extension portion 16; and / or, the first channel 17 and the second channel 18 communicate with each other in the vibration direction of the vibration unit 3.

[0064] Specifically, the circular portion 15 can be used to connect the first vibration assembly 31 and the second vibration assembly 32. The extension portion 16 is located in a partial area on the circumferential side of the circular portion 15, so that the first channel 17 and the second channel 18 are formed in the extension portion 16, and the height direction of the extension portion 16 and the circular portion 15 can be the vibration direction of the vibration unit 3, which is convenient for arranging the first vibration assembly 31 and the second vibration assembly 32 on the circular portion 15.

[0065] Optionally, as Figures 1 to 6 shown, the bracket 1, the first vibration assembly 31, the second vibration assembly 32 and the bracket enclose a rear cavity. A leakage hole 14 communicating with the outside of the sound generating device is provided on the side surface of the bracket 1. The rear cavity communicates with the leakage hole 14 and is separated from the first front cavity and the second front cavity.

[0066] Specifically, since the first vibration assembly and the second vibration assembly 32 are placed on the opposite sides of the bracket 1, the space inside the bracket 1 forms a rear cavity inside the sound generating device through the enclosure of the first vibration assembly 31 and the second vibration assembly 32; the rear cavity is isolated from the space where the two front cavities are located, which can optimize the output frequency response curve of the sound generating device and make the sound emitted by the sound generating device more natural and real.

[0067] In a specific embodiment, two leakage holes 14 are formed on the side surface of the bracket 1. The two leakage holes 14 are respectively located on the opposite side surfaces of the bracket 1, and the distance between the sound outlet hole 13 and the two leakage holes 14 is equal, so as to arrange the sound outlet hole 13 away from the leakage holes 14 to avoid the influence of the sound waves of the leakage holes 14 on the sound emission of the sound outlet hole 13.

[0068] Optionally, as Figure 2 andFigure 5 As shown, when the sound generating device generates sound, the first vibration assembly 31 and the second vibration assembly 32 radiate first sound waves with the same phase to the outside of the sound generating device through the sound outlet hole 11, and the first vibration assembly 31 and the second vibration assembly 32 radiate second sound waves with a phase opposite to that of the first sound waves to the outside of the sound generating device through the leakage hole 14.

[0069] Specifically, the vibration frequencies and amplitudes of the first vibration assembly 31 and the second vibration assembly 32 can be the same, so that the first vibration assembly 31 and the second vibration assembly 32 radiate first sound waves with the same phase to the outside of the sound generating device through the sound outlet hole 13; at least one leakage hole 14 communicating with the side surface can be formed on the side surface of the bracket 1, and the channels of the rear cavity communicating with the leakage hole 14 are separated from the channels of the two front cavities communicating with the sound outlet hole 13, so as to balance the air pressure in the rear cavity and avoid distortion when the sound generating device generates sound.

[0070] In a specific embodiment, two leakage holes 14 communicating with the side surface are formed on the side surface of the bracket 1, and the two leakage holes 14 are respectively located on the opposite sides of the bracket 1, and the distances between the sound outlet hole 13 and the two leakage holes 14 are equal, so as to arrange the sound outlet hole 13 away from the leakage hole 14 to avoid the influence of the sound waves of the leakage hole 14 on the sound generation of the sound outlet hole.

[0071] According to the second aspect of the present invention, as Figures 7 to 8 shown, an acoustic device is provided, including the sound generating device described in the first aspect.

[0072] Specifically, the acoustic device can be a wearable acoustic device. For example, the acoustic device can be an earphone, a bracelet, a watch, a VR device, an AR device or an MR device, or the acoustic device can be other electronic devices. For example, the acoustic device can be one of a mobile phone, a tablet computer, an e-book reader, an audio player, a video player, a computer, a set-top box, a smart TV and a wearable device.

[0073] In the sound generating device of the acoustic device, a plurality of positioning holes 224 evenly distributed along the circumference are provided in the connection area between the central yoke plate 221 and the connecting plate 223 and / or the connection area between the side yoke plate 222 and the connecting plate 223, which can improve the positioning accuracy between the magnetic circuit unit 2 and the vibration unit 3, so as to reduce the assembly difficulty and improve the sound quality of the acoustic device.

[0074] Optionally, as Figures 7 to 8As shown, the acoustic device further includes a housing 100. An external leakage hole 102 and an external speaker hole 101 are provided on the housing 100. Sound output holes 13 and leakage holes 14 are provided on the side surface of the bracket 1. The sound output holes 13 are disposed opposite to and communicate with the external speaker hole. The leakage holes 14 communicate with the external leakage hole 102. A first front cavity is formed on the side of the first vibration assembly 31 away from the second vibration assembly 32. A second front cavity is formed on the side of the second vibration assembly 32 away from the first vibration assembly 31. The first vibration assembly 31, the second vibration assembly 32, the bracket 1 and the magnetic circuit unit 2 enclose a rear cavity. Both the first front cavity and the second front cavity communicate with the external speaker hole 101 through the sound output holes 13. The rear cavity communicates with the external leakage hole 102 through the leakage holes 14. The external leakage hole 102 and the external speaker hole 101 communicate with the outside of the acoustic device respectively.

[0075] Specifically, in this embodiment, when the sound generating device is connected inside the housing 100, an assembly space may exist between the sound generating device and the housing 100. This assembly space can communicate with the rear cavity through the leakage holes 14 to form an external rear cavity, so as to increase the overall volume of the rear cavity in the acoustic device. The external rear cavity communicates with the outside of the acoustic device through the external leakage hole 102, thereby improving the low-frequency sound generating performance of the acoustic device.

[0076] In a specific embodiment, the housing 100 is square. The six surfaces of the housing 100 are respectively a front wall surface, a rear wall surface, a left wall surface, a right wall surface, an upper wall surface and a lower wall surface. One external speaker hole 101 and two external leakage holes 102 are provided on the housing 100. The external speaker hole 101 is located in the middle area of the front wall surface. One external leakage hole 102 is located at the connection of the rear wall surface and the upper wall surface. The other external leakage hole 102 is located at the connection of the rear wall surface and the lower wall surface, so as to balance the low-frequency performance of the acoustic device while ensuring the sound generating effect of the acoustic device.

[0077] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that: include: Bracket; A magnetic circuit unit, the magnetic circuit unit is connected to the bracket, the magnetic circuit unit includes a yoke, a central magnetic circuit and a side magnetic circuit, the magnetic yoke has a central yoke plate, a side yoke plate and a connecting plate, the side yoke plate is located on the outer side of the central yoke plate and is connected to the central yoke plate through the connecting plate, the central magnetic circuit is arranged on the central yoke plate and forms a first magnetic gap with the inner side of the connecting plate, the side magnetic circuit is arranged on the side yoke plate and forms a second magnetic gap with the outer side of the connecting plate; A vibration unit, the vibration unit comprising a first vibration component and a second vibration component, the first vibration component and the second vibration component are respectively connected to the bracket, the first vibration component comprises a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component comprises a second diaphragm and a second voice coil connected to the second diaphragm, at least a portion of the first voice coil is located in the first magnetic gap, and at least a portion of the second voice coil is located in the second magnetic gap; Wherein, a connection area between the central yoke plate and the connection plate and / or a connection area between the side yoke plate and the connection plate is provided with a plurality of positioning holes, and the plurality of positioning holes are evenly distributed along the circumference.

2. The sound generating device according to claim 1, characterized in that: The number of the positioning holes is three.

3. The sound generating device according to claim 1, characterized in that: A side of the first vibration component facing away from the second vibration component forms a first front cavity, and a side of the second vibration component facing away from the first vibration component forms a second front cavity; The bracket has a top surface, a bottom surface and a side surface, and the side surface is provided with a sound hole, wherein in a vibration direction perpendicular to the vibration unit, the sound hole at least partially corresponds to the magnetic circuit unit, and the bracket is provided with a first channel that passes through the top surface and connects the first front cavity and the sound hole, and a second channel that passes through the bottom surface and connects the second front cavity and the sound hole.

4. The sound-generating device according to claim 3, characterized in that: The bracket comprises a first bracket and a second bracket, wherein the first bracket and the second bracket are relatively connected; A side of the first bracket away from the second bracket forms a top surface of the bracket, the first vibration component is connected to the top surface, a side of the second bracket away from the first bracket forms a bottom surface of the bracket, the second vibration component is connected to the bottom surface, and the sound hole is arranged between the first bracket and the second bracket.

5. The sound generating device according to claim 3, characterized in that: The sound-generating device further includes an upper cover and a lower cover, wherein the upper cover is connected to the top surface and forms a first front cavity with the first vibration component, and the lower cover is connected to the bottom surface and forms a second front cavity with the second vibration component, the upper cover has a first outer protrusion facing away from the bracket, and the lower cover has a second outer protrusion facing away from the bracket, at least a portion of the first outer protrusion corresponds to the first channel, and at least a portion of the second outer protrusion corresponds to the second channel.

6. The sound generating device according to claim 3, characterized in that: The bracket includes a circular portion and an extension portion protruding from the circular portion, the first vibration component and the second vibration component are both connected to the circular portion, and the first channel and the second channel are both arranged in the extension portion; And / or, the first channel and the second channel are connected along the vibration direction of the vibration unit.

7. The sound-generating device according to claim 3, characterized in that: The bracket, the first vibration component and the second vibration component surround a rear cavity, and a leakage hole connected to the outside of the sound-generating device is provided on the side of the bracket. The rear cavity is connected to the leakage hole and is separated from the first front cavity and the second front cavity.

8. The sound generating device according to claim 7, characterized in that: When the sound-emitting device emits sound, the first vibration component and the second vibration component radiate first sound waves of the same phase to the outside of the sound-emitting device through the sound outlet hole, and the first vibration component and the second vibration component radiate second sound waves of opposite phase to the first sound wave to the outside of the sound-emitting device through the leakage hole.

9. An acoustic device, characterized in that: A sound-generating device comprising any one of claims 1 to 8.

10. The acoustic device according to claim 9, characterized in that It also includes a shell, the shell is provided with an external leakage hole and an external sounding hole, the side of the bracket is provided with a sound outlet hole and a leakage hole, the sound outlet hole is arranged opposite to and connected to the external sounding hole, and the leakage hole is connected to the external leakage hole; A side of the first vibration component facing away from the second vibration component forms a first front cavity, a side of the second vibration component facing away from the first vibration component forms a second front cavity, and the first vibration component, the second vibration component, the bracket and the magnetic circuit unit form a rear cavity; The first front cavity and the second front cavity are both connected to the external sounding hole through the sound outlet hole, the rear cavity is connected to the external leakage hole through the leakage hole, and the external leakage hole and the external sounding hole are respectively connected to the outside of the acoustic device.

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