Sound production device

Abstract

The utility model discloses an embodiment of sounding device, this sounding device includes casing, magnetic circuit system and vibration system. Among them, magnetic circuit system sets up in casing and is formed with magnetic gap. Vibration system includes drive coil, support, sound film and centering support piece, and drive coil is suspended in magnetic gap, and support sets up around drive coil and includes first connecting structure and second connecting structure, and first connecting structure is connected with drive coil, and second connecting structure is connected with sound film, and sound film is located the top of drive coil, and the first connecting structure sinks and forms the avoidance slot, and centering support piece is located the below of drive coil and is connected with casing and drive coil respectively. Thus, sounding device passes through the support of side joint drive coil to firm connection drive coil and sound film, thereby realizes ensuring drive coil and sound film can vibrate in unison, and provides the installation space for centering support piece simultaneously, helps to improve the low frequency loudness of sounding device.

Description

Technical Field

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

[0002] Sound-generating devices are energy conversion devices used to convert electrical signals into sound signals. With the miniaturization of electronic devices such as mobile phones, tablets, and laptops, it is challenging to improve low-frequency loudness using the limited space of miniature sound-generating devices. The support structure in existing sound-generating devices limits the improvement of low-frequency loudness. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a sound-generating device that ensures that the drive coil and the diaphragm can vibrate synchronously by improving the support structure of the drive coil, bracket and diaphragm, and provides installation space for the centering support plate, which helps to improve the low-frequency loudness of the sound-generating device.

[0004] This utility model provides a sound-generating device, which includes: a housing; a magnetic circuit system disposed in the housing and forming a magnetic gap; and a vibration system, which includes a drive coil, a bracket, a diaphragm, and a centering support plate. The drive coil is suspended in the magnetic gap. The bracket is disposed around the drive coil and includes a first connecting structure and a second connecting structure. The first connecting structure is connected to the drive coil, and the second connecting structure is connected to the diaphragm. The diaphragm is located above the drive coil. The first connecting structure is recessed to form a relief groove. The centering support plate is located below the drive coil and is connected to the housing and the drive coil respectively.

[0005] In some embodiments, the support further includes a support structure, which is connected to the first connecting structure and the second connecting structure respectively.

[0006] In some embodiments, the first connection structure includes: a fitting portion connected to the outer side of the drive coil; a groove bottom connected to the bottom of the fitting portion and disposed away from the drive coil; and an extension portion connected to the groove bottom and extending toward the support structure to connect with the support structure; wherein the fitting portion, the groove bottom, and the extension portion cooperate to form a clearance groove.

[0007] In some embodiments, the bonding portion is arranged vertically and its height is less than that of the drive coil, and the bonding portion is located at the middle position of the outer side of the drive coil.

[0008] In some embodiments, the bonding portion is arranged vertically and its height is less than that of the drive coil, and the distance between the bonding portion and the top of the drive coil is greater than or less than the distance between the bonding portion and the bottom of the drive coil.

[0009] In some implementations, the connection between the first connecting structure and the supporting structure is recessed to form a step.

[0010] In some implementations, the second connecting structure is frame-shaped and has rounded edges.

[0011] In some embodiments, the outer edge of the second connecting structure extends downward to form a bent portion.

[0012] In some embodiments, the diaphragm includes: a first ring portion having a hollowed-out center; a first folded ring arching upwards and surrounding the first ring portion; a second ring portion surrounding the first folded ring, the bottom of the second ring portion being connected to a second connecting structure; a second folded ring arching upwards and surrounding the second ring portion; and a third ring portion surrounding the second folded ring, the third ring portion being connected to a housing.

[0013] In some embodiments, an annular groove is formed by a recess between the second fold and the third ring.

[0014] In some embodiments, the bottom of the third ring is recessed to form a mounting groove, through which the third ring is connected to the housing.

[0015] In some embodiments, the centering support includes: a first connecting portion configured as a frame and connected to the housing; a support portion extending inward from the first connecting portion; and a second connecting portion connected to the support portion and connected to the drive coil.

[0016] In some embodiments, the second connection portion has a receiving groove on the side facing the drive coil.

[0017] In some implementations, the second connecting portion is connected to the first connecting structure.

[0018] In some embodiments, the magnetic circuit system includes: a first magnetic plate connected to a housing; a central magnetic assembly disposed on the first magnetic plate; a side magnetic assembly disposed on the first magnetic plate and surrounding the central magnetic assembly, with a gap between the side magnetic assembly and the central magnetic assembly; and a second magnetic plate connected to the top of the central magnetic assembly.

[0019] In some embodiments, the central magnetic assembly includes: a first central magnet connected to a first magnetic plate; a central magnetic element connected to the first central magnet; and a second central magnet connected to the central magnetic element and the second magnetic plate, respectively.

[0020] In some embodiments, the side magnetic assembly includes: a first side magnet connected to a first magnetic plate; a side magnetic conductor connected to the first side magnet; and a second side magnet connected to the side magnetic conductor.

[0021] In some implementations, the second side magnet is connected to the diaphragm.

[0022] In some embodiments, the first magnetic plate includes: a central portion on which a central magnetic assembly is disposed; and a side portion extending outward from the edge of the central portion, on which a side magnetic assembly is disposed, and the side portion being connected to the housing.

[0023] In some embodiments, the housing includes: a main body portion configured as a frame and connected to a centering support plate; a side wall portion extending upward from the outer edge of the main body portion and connected to a diaphragm; and a lower extension portion extending downward from the inner edge of the main body portion and connected to a magnetic circuit system.

[0024] This invention provides a sound-generating device, comprising a housing, a magnetic circuit system, and a vibration system. The magnetic circuit system is disposed within the housing and forms a magnetic gap. The vibration system includes a drive coil, a support, a diaphragm, and a centering support. The drive coil is suspended in the magnetic gap. The support surrounds the drive coil and includes a first connecting structure and a second connecting structure. The first connecting structure is connected to the drive coil, and the second connecting structure is connected to the diaphragm, which is located above the drive coil. The first connecting structure is recessed to form a clearance groove. The centering support is located below the drive coil and is connected to both the housing and the drive coil. Thus, the sound-generating device securely connects the drive coil and the diaphragm via the support side-connected to the drive coil, ensuring synchronous vibration of the drive coil and the diaphragm. It also provides installation space for the centering support, contributing to improved low-frequency loudness of the sound-generating device. Attached Figure Description

[0025] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a schematic diagram of the structure of the sound-generating device provided in this embodiment of the utility model;

[0027] Figure 2 This is a structural schematic diagram of the sound-generating device provided in another embodiment of the present utility model;

[0028] Figure 3 This is a structural schematic diagram of the sound-generating device provided in another embodiment of the present utility model;

[0029] Figure 4This is a cross-sectional schematic diagram of the sound-generating device provided in an embodiment of this utility model;

[0030] Figure 5 This is another cross-sectional schematic diagram of the sound-generating device provided in this embodiment of the utility model;

[0031] Figure 6 This is an exploded schematic diagram of the sound-generating device provided in this embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the bracket provided in an embodiment of the present utility model;

[0033] Figure 8 This is a schematic diagram of the diaphragm structure provided in an embodiment of the present invention;

[0034] Figure 9 This is a structural schematic diagram of the diaphragm from another perspective provided in an embodiment of this utility model;

[0035] Figure 10 This is a schematic diagram of the centering support provided in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the first magnetic plate provided in this embodiment of the utility model;

[0037] Figure 12 This is a schematic diagram of the structure of the shell provided in an embodiment of the present utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Housing; 11-Main body; 12-Side wall; 13-Lower extension; 2-Magnetic circuit system; 21-Magnetic gap; 22-First magnetic guide plate; 221-Center; 222-Side; 23-Central magnetic assembly; 231-First central magnet; 232-Central magnetic guide; 233-Second central magnet; 24-Side magnetic assembly; 241-First side magnet; 242-Side magnetic guide; 243-Second side magnet; 25-Second magnetic guide plate; 3-Vibration system; 31-Drive coil; 311-Lead wire; 32-Bracket; 321-First connecting structure; 3211-Fitting part ; 3212-Groove bottom; 3213-Extension; 322-Second connecting structure; 3221-Circular edge; 3222-Bending part; 323-Allowing groove; 324-Supporting structure; 325-Step; 33-Diaphragm; 331-First ring; 332-First folded ring; 333-Second ring; 334-Second folded ring; 335-Third ring; 3351-Mounting groove; 336-Annular groove; 34-Centering support; 341-First connecting part; 342-Supporting part; 343-Second connecting part; 3431-Receiving groove; 35-First reinforcing member; 36-Second reinforcing member. Detailed Implementation

[0040] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0041] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0042] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0044] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0045] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] Figure 1This is a schematic diagram of the structure of the sound-generating device provided in this embodiment of the utility model. Figure 2 This is a structural schematic diagram of the sound-generating device provided in another embodiment of the present invention, combined with... Figure 1 and Figure 2 As shown, the sound-generating device includes a housing 1, a magnetic circuit system 2, and a vibration system 3. Further, Figure 3 This is a structural schematic diagram of the sound-generating device provided in another embodiment of the present invention. Figure 4 This is a cross-sectional schematic diagram of the sound-generating device provided in an embodiment of this utility model. Figure 5 This is another cross-sectional view of the sound-generating device provided in this embodiment of the utility model. It should be noted that... Figure 4 This is a rotated sectional view of plane AA. Figure 5 This is a full cross-sectional view of the BB surface. Furthermore, Figure 6 This is an exploded schematic diagram of the sound-generating device provided in this embodiment of the utility model, combined with the body. Figures 4 to 6 As shown, the magnetic circuit system 2 is disposed in the housing 1 and forms a magnetic gap 21. The vibration system 3 includes a drive coil 31, a support 32, a diaphragm 33, and a centering support 34. The diaphragm 33 is located above the drive coil 31, and the centering support 34 is located below the drive coil 31. Specifically, the drive coil 31 is suspended in the magnetic gap 21. The support 32 is disposed around the drive coil 31 and includes a first connecting structure 321 and a second connecting structure 322. The first connecting structure 321 is connected to the outer surface of the drive coil 31, and the second connecting structure 322 is connected to the bottom surface of the diaphragm 33. The centering support 34 is connected to both the housing 1 and the bottom of the drive coil 31. More specifically, the first connecting structure 321 is recessed to form a relief groove 323. The relief groove 323 has a U-shaped cross-section and its opening faces the diaphragm 33 to avoid interference between the support 32 and the diaphragm 33 during vibration. Thus, the sound-generating device securely connects the drive coil 31 and the diaphragm 33 via the bracket 32 ​​that connects the drive coil 31 to the side, thereby ensuring that the drive coil 31 and the diaphragm 33 can vibrate synchronously, while providing installation space for the centering support plate 34, which helps to improve the low-frequency loudness of the sound-generating device.

[0047] Figure 7 This is a structural schematic diagram of the bracket provided in an embodiment of the present utility model, combined with... Figure 4 and Figure 7As shown, in one embodiment, the bracket 32 ​​further includes a support structure 324. Specifically, the support structure 324 is connected to the first connecting structure 321 and the second connecting structure 322, respectively. Optionally, the first connecting structure 321, the support structure 324, and the second connecting structure 322 are integrally formed. It should be noted that there are four first connecting structures 321, which correspond to the four curved surfaces on the outer side of the drive coil 31, respectively. Correspondingly, the second connecting structure 322 extends four support structures 324 to connect the four first connecting structures 321, respectively. Thus, the connection between the bracket 32 ​​and the drive coil 31 can ensure uniform force distribution, which can improve the connection strength and enable the vibration system 3 to vibrate smoothly.

[0048] like Figure 7 As shown, in one embodiment, the first connecting structure 321 includes a fitting portion 3211, a groove bottom 3212, and an extension portion 3213. Specifically, the fitting portion 3211 is connected to the outer surface of the drive coil 31, the groove bottom 3212 is connected to the bottom of the fitting portion 3211 and is disposed away from the drive coil 31, and the extension portion 3213 is connected to the groove bottom 3212 and extends toward the support structure 324 to achieve connection with the support structure 324. It is easy to understand that the fitting portion 3211, the groove bottom 3212, and the extension portion 3213 cooperate to form a clearance groove 323. It should be noted that since the first connecting structure 321 of the bracket 32 ​​is connected to the curved surface on the outer surface of the drive coil 31, the fitting portion 3211 is matched with the curved surface and is set as a plate-like structure with a certain curvature to ensure that the fitting portion 3211 can be stably connected to the drive coil 31. Furthermore, the bottom of the groove 3212 is horizontally arranged, and the extension 3213 is inclined upward from the bottom of the groove 3212, thereby adapting to the structure of the diaphragm 33 to form a clearance and prevent interference during vibration.

[0049] Combination Figure 4 and Figure 7 As shown, in one embodiment, the bonding portion 3211 is arranged vertically and its height is less than that of the drive coil 31. Further, the bonding portion 3211 is located at the middle position of the outer surface of the drive coil 31. It is readily understood that the vibration of the drive coil 31 in the magnetic gap 21 causes the support 32 to vibrate, thereby causing the diaphragm 33 to vibrate. The relative position of the bonding portion 3211 and the drive coil 31 actually reflects the initial position of the drive coil 31 in the magnetic gap 21. By placing the bonding portion 3211 at the middle position of the outer surface of the drive coil 31, it helps ensure that the drive coil 31 can be symmetrically and centrally suspended in the magnetic gap 21, thereby reducing distortion and improving electroacoustic conversion efficiency.

[0050] As an optional implementation, the fitting portion 3211 is arranged vertically and its height is less than that of the drive coil 31. Furthermore, the distance between the fitting portion 3211 and the top of the drive coil 31 is greater than or less than the distance between the fitting portion 3211 and the bottom of the drive coil 31. That is, the position of the fitting portion 3211 is offset downwards or upwards relative to the drive coil 31. It should be noted that, based on different design requirements of the magnetic circuit system 2 and the bracket 32, the sound quality can also be improved by adjusting the relative position of the fitting portion 3211 and the drive coil 31.

[0051] like Figure 7 As shown, in one embodiment, the connection between the first connecting structure 321 and the support structure 324 is recessed to form a step 325. It is readily understood that the bracket 32 ​​forms a height difference, or a thickness difference, at the step 325. It is also readily understood that the step 325 is lower on the side closer to the clearance groove 323. Thus, the step 325 can cooperate with the clearance groove 323 to form a clearance, preventing interference with the diaphragm 33 during vibration.

[0052] like Figure 7 As shown, in one embodiment, the second connecting structure 322 is frame-shaped and has rounded edges 3221. It should be noted that the rounded edges 3221 are located at the four corners of the second connecting structure 322. When the second connecting structure 322 is connected to the diaphragm 33, the rounded edges 3221 can create a buffer to reduce the bonding area with the diaphragm 33, thereby ensuring that the diaphragm 33 can vibrate stably and effectively.

[0053] like Figure 7 As shown, in one embodiment, the outer edge of the second connecting structure 322 extends downward to form a bent portion 3222. It should be noted that the bent portions 3222 are located at the positions of the two longer sides of the second connecting structure 322, and the sound-generating device has sufficient space inside for the bent portions 3222 to allow the diaphragm 33 to reciprocate, which can be used in conjunction with... Figure 5 As shown. Furthermore, the second connecting structure 322, by providing a bend 3222, helps to balance the forces, thereby ensuring that the vibration system 3 can vibrate smoothly.

[0054] Figure 8 This is a schematic diagram of the diaphragm structure provided in an embodiment of the present invention, as shown below. Figure 8As shown, in one embodiment, the diaphragm 33 is integrally formed and includes, from the inside out, a first ring portion 331, a first folded ring 332, a second ring portion 333, a second folded ring 334, and a third ring portion 335. Specifically, the first ring portion 331 has a hollow center; the first folded ring 332 arches upward and surrounds the first ring portion 331; the second ring portion 333 surrounds the first folded ring 332 and its bottom is connected to the second connecting structure 322; the second folded ring 334 arches upward and surrounds the second ring portion 333; and the third ring portion 335 surrounds the second folded ring 334 and is connected to the housing 1. Thus, the diaphragm 33 improves effective compliance by providing double folded rings, which helps to improve low-frequency loudness. Optionally, the diaphragm 33 is made of a highly compliant diaphragm material, such as a rubber diaphragm.

[0055] Combination Figure 5 and Figure 6 As shown, in one embodiment, a first reinforcing member 35 is provided above the second ring portion 333 of the diaphragm 33. Further, a second connecting structure 322 is provided below the second ring portion 333. That is, the second ring portion 333 of the diaphragm 33 is clamped and fixed between the first reinforcing member 35 and the second connecting structure 322, which helps to enhance the connection strength between the second connecting structure 322 and the second ring portion 333, that is, to enhance the connection strength between the support 32 and the diaphragm 33.

[0056] like Figure 8 As shown, in one embodiment, an annular groove 336 is formed between the second folded ring 334 and the third ring portion 335. It should be noted that by providing the annular groove 336 that arches in the opposite direction to the first folded ring 332 and the second folded ring 334, the diaphragm 33 can improve both the structural strength and the connection strength between the third ring portion 335 and the housing 1, thereby helping to improve the sound quality of the sound-generating device.

[0057] Figure 9 This is a structural schematic diagram of the diaphragm from another perspective, as shown in the embodiment of this utility model. Figure 9 As shown, in one embodiment, a mounting groove 3351 is formed in the bottom recess of the third ring portion 335. Specifically, the third ring portion 335 is connected to the housing 1 through the mounting groove 3351. That is, the housing 1 can increase the connection area between the two by embedding the mounting groove 3351, thereby further improving the connection strength between the diaphragm 33 and the housing 1, so as to improve the product quality of the sound-generating device.

[0058] Figure 10 This is a schematic diagram of the centering support provided in an embodiment of the present invention, as shown below. Figure 10As shown, in one embodiment, the centering support 34 includes a first connecting portion 341, a supporting portion 342, and a second connecting portion 343. Specifically, the first connecting portion 341 is frame-shaped and connected to the housing 1, the supporting portion 342 extends inward from the first connecting portion 341, and the second connecting portion 343 is connected to the supporting portion 342 and connected to the drive coil 31. Further, corresponding to the four corners of the drive coil 31, there are four supporting portions 342 and four second connecting portions 343. It should be noted that the centering support 34 is made of a flexible material, which can suppress vibration and sway, and help improve sound quality. Optionally, the centering support 34 is configured as a flexible circuit board, which helps to realize the electrical signal conduction of the drive coil 31 when the centering support 34 is connected to the drive coil 31. It should be further explained that the support part 342 is set as a strip structure and is bent once or multiple times on the horizontal plane. When the drive coil 31 vibrates and drives the second connecting part 343, the support part 342 can use its own deformation to provide sufficient range of motion, thereby avoiding pulling the drive coil 31 and causing sound problems.

[0059] like Figure 10 As shown, in one embodiment, the second connecting portion 343 has a receiving groove 3431 on the side facing the driving coil 31, and the receiving groove 3431 is located below the first connecting structure 321. It should be noted that, as... Figure 6 As shown, the drive coil 31 has two leads 311. Furthermore, the leads 311 are disposed in a receiving groove 3431, which can position and limit the leads 311. On the other hand, the receiving groove 3431 prevents the leads 311 from occupying too much space between the first connecting structure 321 and the centering support 34, thus helping to reduce the overall thickness of the sound-generating device. Therefore, the leads 311 can be fixedly disposed between the second connecting portion 343 and the bottom 3212 of the groove in the first connecting structure 321, that is, fixedly disposed between the centering support 34 and the bracket 32.

[0060] In one embodiment, the second connecting portion 343 is connected to the first connecting structure 321. It should be noted that the second connecting portion 343 of the centering support 34 is simultaneously bonded to the first connecting structure 321 of the bracket 32 ​​and the bottom of the drive coil 31, so that the bracket 32 ​​and the centering support 34 can act on the drive coil 31 at the same time, thereby reducing polarization and improving sound quality.

[0061] Combination Figures 4 to 6As shown, in one embodiment, the magnetic circuit system 2 includes a first magnetic guide plate 22, a central magnetic assembly 23, a side magnetic assembly 24, and a second magnetic guide plate 25. Specifically, the first magnetic guide plate 22 is connected to the housing 1, the central magnetic assembly 23 is disposed on the first magnetic guide plate 22, the side magnetic assembly 24 is disposed on the first magnetic guide plate 22 and surrounds the central magnetic assembly 23, and there is a gap between the side magnetic assembly 24 and the central magnetic assembly 23 to form a magnetic gap 21. The second magnetic guide plate 25 is connected to the top of the central magnetic assembly 23. It should be noted that the first magnetic guide plate 22 and the second magnetic guide plate 25, together with the housing 1, constitute the outer shell of the sound-generating device. It should be further noted that the first magnetic guide plate 22 and the second magnetic guide plate 25 are made of soft iron.

[0062] Combination Figures 4 to 6 As shown, in one embodiment, the central magnetic assembly 23 includes a first central magnet 231, a central magnetic conductor 232, and a second central magnet 233. Specifically, the first central magnet 231 is connected to a first magnetic plate 22, the central magnetic conductor 232 is connected to the first central magnet 231, and the second central magnet 233 is connected to the central magnetic conductor 232 and the second magnetic plate 25, respectively. Thus, the first central magnet 231, the central magnetic conductor 232, and the second central magnet 233 are clamped and fixed between the first magnetic plate 22 and the second magnetic plate 25. It should be noted that the central magnetic conductor 232 is made of soft iron.

[0063] Combination Figure 5 and Figure 6 As shown, in one embodiment, the side magnetic assembly 24 includes a first side magnet 241, a side magnetic conductor 242, and a second side magnet 243. Specifically, the first side magnet 241 is connected to the first magnetic plate 22, the side magnetic conductor 242 is connected to the first side magnet 241, and the second side magnet 243 is connected to the side magnetic conductor 242. It should be noted that the side magnetic conductor 242 is made of soft iron.

[0064] like Figure 5 As shown, in one embodiment, the second side magnet 243 is connected to the bottom of the diaphragm 33. Further, a second reinforcing member 36 is provided above the first ring portion 331 of the diaphragm 33, and a second side magnet 243 is provided below it. A second magnetically conductive plate 25 is connected to the top of the second reinforcing member 36. Thus, the second magnetically conductive plate 25 and the first magnetically conductive plate 22 can clamp and fix the first side magnet 241, the side magnetically conductive member 242, the second side magnet 243, the diaphragm 33, and the second reinforcing member 36, which helps to improve the connection strength of each part.

[0065] Figure 11 This is a schematic diagram of the structure of the first magnetic plate provided in an embodiment of this utility model, as shown below. Figure 11As shown, in one embodiment, the first magnetic plate 22 includes a central portion 221 and side portions 222. Specifically, a central magnetic component 23 is disposed on the central portion 221, and the side portions 222 extend outward from the edge of the central portion 221, with side magnetic components 24 disposed on the side portions 222. The side portions 222 are connected to the housing 1. More specifically, the central portion 221 is connected to the first central magnet 231, and the side portions 222 are connected to the first side magnet 241. It should be noted that there are four sets of side magnetic components 24, spaced apart around the central magnetic component 23, with the four side portions 222 extending outward from the four sides of the central portion 221. That is, the first magnetic plate 22 is configured with a cross-shaped structure. It is easy to understand that the first connecting structure 321 and the side magnetic components 24 are staggered to avoid mutual interference.

[0066] Therefore, the magnetic circuit system 2 described above increases the magnet volume and improves the magnetic flux density modulus by forming a double-layer symmetrical magnetic circuit, which helps to improve the low-frequency loudness of the sound-generating device.

[0067] Figure 12 This is a schematic diagram of the structure of the shell provided in an embodiment of the present utility model, as shown below. Figure 12 As shown, in one embodiment, the housing 1 includes a main body 11, a side wall 12, and a lower extension 13. Specifically, the main body 11 is frame-shaped and connected to a centering support 34. The side wall 12 extends upward from the outer edge of the main body 11 and is connected to a diaphragm 33. The lower extension 13 extends downward from the inner edge of the main body 11 and is connected to the magnetic circuit system 2. More specifically, the first connecting portion 341 of the centering support 34 is connected to the bottom of the main body 11. The side wall 12 is embedded in the mounting groove 3351 at the bottom of the third ring portion 335 of the diaphragm 33 for easy connection to the diaphragm 33. The bottom of the lower extension 13 extends horizontally to form an L-shaped structure and is connected to the side portion 222 of the first magnetic plate 22 of the magnetic circuit system 2. It should be noted that there are four side portions 222. The four sides of the main body 11 extend downward to form four lower extensions 13, and the four lower extensions 13 are connected to the four side portions 222 one by one. It should be further explained that the shape and size of the side portion 222 can match the lower extension 13, and the size of the side portion 222 can also be set to be larger than the lower extension 13 to ensure the connection effect.

[0068] This invention provides a sound-generating device, comprising a housing, a magnetic circuit system, and a vibration system. The magnetic circuit system is disposed within the housing and forms a magnetic gap. The vibration system includes a drive coil, a support, a diaphragm, and a centering support. The drive coil is suspended in the magnetic gap. The support surrounds the drive coil and includes a first connecting structure and a second connecting structure. The first connecting structure is connected to the drive coil, and the second connecting structure is connected to the diaphragm, which is located above the drive coil. The first connecting structure is recessed to form a clearance groove. The centering support is located below the drive coil and is connected to both the housing and the drive coil. Thus, the sound-generating device securely connects the drive coil and the diaphragm via the support side-connected to the drive coil, ensuring synchronous vibration of the drive coil and the diaphragm. It also provides installation space for the centering support, contributing to improved low-frequency loudness of the sound-generating device.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sound producing device, characterized by, The sound production device comprises: a shell; a magnetic circuit system arranged in the shell and formed with a magnetic gap; and a vibration system comprising a driving coil, a support, a sound film and a centering bracket, the driving coil being suspended in the magnetic gap, the support being arranged around the driving coil and comprising a first connecting structure and a second connecting structure, the first connecting structure being connected with the driving coil, the second connecting structure being connected with the sound film, the sound film being located above the driving coil, a first reinforcing member being arranged above the sound film, the first connecting structure being sunken to form an avoiding groove, the centering bracket being located below the driving coil and connected with the shell and the driving coil respectively.

2. The sound production device of claim 1, wherein, The support further comprises: a support structure connected with the first connecting structure and the second connecting structure respectively.

3. The sound production device of claim 2, wherein, The first connecting structure comprises: a fitting part connected with the outer side of the driving coil; a groove bottom connected with the bottom of the fitting part and arranged away from the driving coil; and an extension part connected with the groove bottom and extending towards the support structure to be connected with the support structure; wherein the fitting part, the groove bottom and the extension part cooperatively form the avoiding groove.

4. The sound production device of claim 3, wherein, The fitting part is arranged in the vertical direction and has a height smaller than the driving coil, and the fitting part is located at the middle position of the outer side of the driving coil.

5. The sound production device of claim 3, wherein, The fitting part is arranged in the vertical direction and has a height smaller than the driving coil, and the distance between the fitting part and the top of the driving coil is greater than or smaller than the distance between the fitting part and the bottom of the driving coil.

6. The sound production device of claim 2, wherein, The connection between the first connecting structure and the support structure is sunken to form a step.

7. The sound production device of any one of claims 1-6, wherein, The second connecting structure is arranged in a frame type and provided with a circular arc edge.

8. The sound production device of any one of claims 1-6, wherein, The outer edge of the second connecting structure extends downward to form a bending part.

9. The sound production device of any one of claims 1-6, wherein, The sound film comprises: a first ring part with a hollow formed in the middle thereof; a first folded ring part arched upward and arranged around the first ring part; a second ring part arranged around the first folded ring part, the bottom of the second ring part being connected with the second connecting structure; a second folded ring part arched upward and arranged around the second ring part; and a third ring part arranged around the second folded ring part, the third ring part being connected with the shell.

10. The sound production device of claim 9, wherein, An annular groove is sunken between the second folded ring part and the third ring part.

11. The sound production device of claim 9, wherein, The bottom of the third ring part is recessed to form a mounting groove, and the third ring part is connected with the shell through the mounting groove.

12. The sound production device of any one of claims 1-6, wherein, The centering bracket comprises: a first connecting part arranged in a frame type and connected with the shell; a support part extended inwardly from the first connecting part; and a second connecting part connected with the support part and connected with the driving coil.

13. The sound production device of claim 12, wherein, The second connecting part is provided with a containing groove towards one side of the driving coil.

14. The sound production device of claim 12, wherein, The second connecting part is connected with the first connecting structure.

15. The sound production device of any one of claims 1-6, wherein, The magnetic circuit system comprises: a first magnetic conducting plate connected with the shell; a center magnetic assembly disposed on the first magnetic conductive plate; a side magnetic assembly disposed on the first magnetic conductive plate and around the center magnetic assembly, the side magnetic assembly having a space with the center magnetic assembly; and a second magnetic conductive plate connected to a top of the center magnetic assembly.

16. The sound production device of claim 15, wherein, The center magnetic assembly comprises: a first center magnet connected to the first magnetic conductive plate; a center magnetic conductive member connected to the first center magnet; and a second center magnet connected to the center magnetic conductive member and the second magnetic conductive plate respectively.

17. The sound production device of claim 15, wherein, The side magnetic assembly comprises: a first side magnet connected to the first magnetic conductive plate; a side magnetic conductive member connected to the first side magnet; and a second side magnet connected to the side magnetic conductive member.

18. The sound production device of claim 17, wherein, The second side magnet is connected to the diaphragm.

19. The sound production device of claim 15, wherein, The first magnetic conductive plate comprises: a center portion on which the center magnetic assembly is disposed; and a side portion extended outwardly from an edge of the center portion, on which the side magnetic assembly is disposed, the side portion being connected to the shell.

20. The sound production device of any one of claims 1-6, wherein, The shell comprises: a main body portion disposed in a frame type and connected to the centering web; a side wall portion extended upwardly from an outer edge of the main body portion and connected to the diaphragm; and a lower extension portion extended downwardly from an inner edge of the main body portion and connected to the magnetic circuit system.

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