Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, wherein the sound production device comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap which are spaced apart from inside to outside, the vibration system comprises a diaphragm, a first voice coil, a second voice coil and a centering support sheet, the diaphragm is arranged opposite to the magnetic circuit system, the shell is connected to the magnetic circuit system and the diaphragm, the centering support sheet comprises a first connecting part, an elastic part and a second connecting part, the first connecting part is connected to the diaphragm and connected to the upper ends of the first voice coil and the second voice coil, the second connecting part is connected to the shell, along the vibration direction of the vibration system, the first connecting part and the elastic part are located in different horizontal planes, and the lower ends of the first voice coil and the second voice coil are arranged correspondingly to the first magnetic gap and the second magnetic gap. The technical scheme of the application aims to play a centering role on the vibration system from different positions through the first connecting part and the elastic part, improve the running stability of the vibration system of the sound production device, and improve the sound production effect.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic conversion equipment, and particularly to a sound-generating device and electronic equipment. 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, increasing the difficulty of setting up the corresponding centering structure and affecting the centering effect of the centering support. Therefore, maintaining the vibrational stability of a large-amplitude vibration system becomes a pressing problem to solve. Summary of the Invention

[0003] The main objective of this invention is to provide a sound-generating device that uses a first connecting part and an elastic part to center the vibration system from different positions, thereby improving the operational stability of the vibration system and enhancing the sound-generating effect.

[0004] To achieve the above objectives, the sound-generating device proposed in this invention includes:

[0005] shell;

[0006] The magnetic circuit system is provided with a first magnetic gap and a second magnetic gap spaced apart from the inside to the outside;

[0007] A vibration system includes a diaphragm, a first voice coil, a second voice coil, and a centering support. The diaphragm is disposed opposite to the magnetic circuit system. A housing connects the magnetic circuit system and the diaphragm. The centering support includes a first connecting portion, an elastic portion, and a second connecting portion. The first connecting portion is connected to the diaphragm and is connected to the upper ends of both the first and second voice coils. The second connecting portion is connected to the housing. Along the vibration direction of the vibration system, the first connecting portion and the elastic portion are located in different horizontal planes. The lower end of the first voice coil is disposed corresponding to the first magnetic gap, and the lower end of the second voice coil is disposed corresponding to the second magnetic gap.

[0008] In one embodiment, the first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion. Multiple connecting legs are arranged at intervals along the circumference of the annular connecting portion. Each connecting leg is sequentially connected to an elastic portion and a second connecting portion. The upper end of the first voice coil is connected to the annular connecting portion, and the upper end of the second voice coil is connected to multiple connecting legs.

[0009] In one embodiment, the vibration system further includes a first frame, the upper end of the first voice coil is connected to the first frame, and the annular connecting portion is located on the side of the first frame opposite to the first voice coil.

[0010] In one embodiment, the vibration system further includes a second frame, the upper end of the second voice coil being connected to the second frame, and a portion of the connecting legs being located between the second frame and the second voice coil.

[0011] In one embodiment, a connecting step is provided at the end of the connecting leg away from the annular connecting portion, and the second frame is sandwiched between the connecting step and the diaphragm.

[0012] In one embodiment, the first connecting portion further includes a transition section that connects the connecting leg and the elastic portion respectively, at least a portion of the transition section extending along the vibration direction of the vibration system, and the transition section being located inside or outside the second voice coil.

[0013] In one embodiment, the vibration system further includes a second frame, which includes an annular frame body and frame extensions spaced apart along the circumferential direction of the frame body. The top of the second voice coil is connected to the frame body, and the transition section is fitted and connected to the frame extensions.

[0014] In one embodiment, both the transition section and the skeleton extension extend along the vibration direction of the vibration system.

[0015] In one embodiment, the adapter segment is located between the skeleton extension and the second voice coil.

[0016] In one embodiment, both the adapter section and the skeleton extension are located outside the second voice coil.

[0017] In one embodiment, the adapter segment is bonded to the skeleton extension.

[0018] In one embodiment, the first connection portion is provided with a plurality of first pads, and the leads of the first voice coil and the second voice coil are electrically connected to the first pads. The second connection portion is provided with second pads for electrical connection to an external power source.

[0019] In one embodiment, the first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion. Multiple connecting legs are arranged at intervals along the circumference of the annular connecting portion. Each connecting leg is sequentially connected to an elastic portion and a second connecting portion. The upper end of the first voice coil is connected to the annular connecting portion, and the upper end of the second voice coil is connected to multiple connecting legs. The first solder pad is provided on the connecting leg.

[0020] 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.

[0021] In one embodiment, multiple elastic portions are provided in a one-to-one correspondence with the second connecting portion, and the multiple elastic portions are arranged at intervals along the circumference of the first connecting portion; the second side magnetic circuit portion is provided with multiple clearance notches that connect the second magnetic gap, and one elastic portion is correspondingly provided in one clearance notch.

[0022] The present invention also proposes an electronic device including the aforementioned sound-generating device.

[0023] In this invention, the first connecting portion of the centering support is located between the diaphragm and the voice coil, and is connected to the diaphragm, the first voice coil, and the second voice coil. The second connecting portion of the centering support is connected to the housing, allowing the housing to provide an additional fulcrum for the diaphragm, the first voice coil, and the second voice coil. An elastic portion exists between the first connecting portion and the housing. While ensuring that the first connecting portion can move relative to the housing with the diaphragm and the voice coil, the elastic portion can also absorb vibration energy in other directions. Therefore, the centering support can effectively limit the displacement of the first voice coil, the second voice coil, and the diaphragm in non-vibration directions, thereby maintaining the vibration stability of the vibration system and ensuring the sound production performance of the sound-generating device. Simultaneously, since the first connecting portion is connected to both the diaphragm, the first voice coil, and the second voice coil, the vibration synchronization of the first and second voice coils can be ensured, further guaranteeing the sound production performance of the sound-generating device. Furthermore, since the elastic part and the first connecting part are located on different horizontal planes, the elastic part is less likely to interfere with the diaphragm. Moreover, the first connecting part and the elastic part can center the voice coil from different positions, ensuring that the voice coil moves in a precise straight line in the vertical direction, reducing skew or lateral displacement, thereby improving the smoothness of the sound-generating device and enhancing the sound production effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of the sound-generating device of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a centering support plate of the sound-generating device of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of an embodiment of the second frame of the sound-generating device of the present invention;

[0028] Figure 4 This is a schematic diagram of a partial structural assembly state of an embodiment of the sound-generating device of the present invention;

[0029] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0030] Figure 6 for Figure 4 Another enlarged view of a section;

[0031] Figure 7 This is a cross-sectional schematic diagram of an embodiment of the sound-generating device of the present invention, cut along the width direction;

[0032] Figure 8 This is a schematic diagram of the structure of a first-side washer of the sound-generating device of the present invention.

[0033] Explanation of icon numbers:

[0034] 100. Outer shell;

[0035] 200. Magnetic circuit system; 201. First magnetic gap; 202. Second magnetic gap;

[0036] 210. Magnetic yoke;

[0037] 220. Central magnetic circuit section; 221. Central magnet; 222. Central washer;

[0038] 230. First side magnetic circuit section; 231. First side magnet; 232. First side washer; 2321. Avoidance structure;

[0039] 240. Second side magnetic circuit section; 241. Second side magnet; 242. Second side washer; 243. Avoidance gap;

[0040] 300. Vibration system;

[0041] 310. Diaphragm; 311. Diaphragm body; 312. Vibrating plate;

[0042] 320. First voice coil; 321. First skeleton;

[0043] 330. Second voice coil; 331. Second frame; 3311. Frame body; 3312. Frame extension;

[0044] 340. Centering support plate; 341. First connecting part; 3411. Annular connecting part; 3412. Connecting leg; 3413. Connecting step; 3414. Transition section; 342. Second connecting part; 343. Elastic part.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications 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 indications will also change accordingly.

[0048] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, 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 invention.

[0049] This invention proposes a sound-generating device.

[0050] Reference Figure 1 , Figure 2 , Figures 4 to 7 In one embodiment of the present invention, the sound-generating device includes:

[0051] Casing 100;

[0052] The magnetic circuit system 200 is provided with a first magnetic gap 201 and a second magnetic gap 202 that are spaced apart from the inside to the outside.

[0053] The vibration system 300 includes a diaphragm 310, a first voice coil 320, a second voice coil 330, and a centering support 340. The diaphragm 310 is disposed opposite to the magnetic circuit system 200. The housing 100 connects the magnetic circuit system 200 and the diaphragm 310. The centering support 340 includes a first connecting portion 341, an elastic portion 343, and a second connecting portion 342. The first connecting portion 341 is connected to the diaphragm 310 and is connected to the upper ends of both the first voice coil 320 and the second voice coil 330. The second connecting portion 342 is connected to the housing 100. Along the vibration direction of the vibration system 300, the first connecting portion 341 and the elastic portion 343 are located in different horizontal planes. The lower end of the first voice coil 320 is disposed corresponding to the first magnetic gap 201, and the lower end of the second voice coil 330 is disposed corresponding to the second magnetic gap 202. The elastic part 343 may include at least one bend, which may be bent in the horizontal direction or in the vibration direction of the vibration system, so that the elastic part 343 has the ability to deform and recover deformation. The diaphragm 310 may include a diaphragm body 311 and a vibrating plate 312. The diaphragm body 311 has an inner ring hole in the center, and the vibrating plate 312 is disposed in the inner ring hole and connected to the diaphragm body 311.

[0054] In the technical solution of the present invention, the first connecting portion 341 of the centering support plate 340 is located between the diaphragm 310 and the voice coil, and is connected to the diaphragm 310, the first voice coil 320 and the second voice coil 330. The second connecting portion 342 of the centering support plate 340 is connected to the housing, so that the housing can provide an additional fulcrum for the diaphragm 310, the first voice coil 320 and the second voice coil 330. There is an elastic portion 343 between the first connecting portion 341 and the housing. While ensuring that the first connecting portion 341 can move with the diaphragm 310 and the voice coil relative to the housing, the elastic portion 343 can also absorb vibration energy in other directions. Thus, the centering support plate 340 can effectively limit the displacement of the first voice coil 320, the second voice coil 330 and the diaphragm 310 in non-vibration directions, thereby maintaining the vibration stability of the vibration system 300 and ensuring the sound production performance of the sound generating device. Meanwhile, since the first connecting part 341 is connected to both the diaphragm 310, the first voice coil 320, and the second voice coil 330, it can ensure the vibration synchronization of the first voice coil 320 and the second voice coil 330, thereby further ensuring the sound production performance of the sound-generating device. In addition, since the elastic part 343 and the first connecting part 341 are located on different horizontal planes, the elastic part 343 is less likely to interfere with the diaphragm 310. Moreover, the elastic part 343 and the first connecting part 341 can center the voice coil at different positions, which can help ensure that the voice coil moves precisely in a vertical direction, reduce skew or lateral displacement, thereby improving the operational stability of the sound-generating device and enhancing the sound production effect.

[0055] It should be noted that in the present invention, the upper end, horizontal plane, horizontal direction, and vertical direction refer to the location of the sound-generating device. Figure 1 and Figure 7 In the illustrated state, the horizontal direction is the extension direction of the diaphragm 310, and the vertical direction is the vibration direction of the diaphragm 310. The upper end of the first voice coil 320 and the second voice coil 330 refers to the end closest to the diaphragm 310, and the lower end of the first voice coil 320 and the second voice coil 330 refers to the end away from the diaphragm 310. The first connecting part 341 and the elastic part 343 are located on different horizontal planes, meaning that the first connecting part 341 and the elastic part 343 are not coplanar in the vibration direction of the diaphragm 310. Other related concepts referring to the illustrated state correspond in the same way and will not be repeated later. In addition, the lower end of the first voice coil 320 is set in the first magnetic gap 201, and the lower end of the second voice coil 330 is set in the second magnetic gap 202. It can be understood that the lower end of the first voice coil 320 can be inserted into the first magnetic gap 201. Of course, the lower end of the first voice coil 320 can also be located above the first magnetic gap 201. Similarly, the lower end of the second voice coil 330 can be inserted into the second magnetic gap 202 or located above the second magnetic gap 202.

[0056] In one embodiment, please refer to the following: Figure 1 , Figure 2 , Figures 4 to 6 The first connecting portion 341 includes an annular connecting portion 3411 and connecting legs 3412 extending outward from the annular connecting portion 3411. Multiple connecting legs 3412 are spaced apart along the circumference of the annular connecting portion 3411. Each connecting leg 3412 is sequentially connected to an elastic portion 343 and a second connecting portion 342. The upper end of the first voice coil 320 is connected to the annular connecting portion 3411, and the upper end of the second voice coil 330 is connected to multiple connecting legs 3412. Thus, the centering support 340 can provide uniform stabilizing force at multiple points along the circumference of the voice coil, reliably maintaining the stability of the vibration of the first voice coil 320 and the second voice coil 330, ensuring the sound production performance of the sound-generating device. Furthermore, the centering support 340 has high structural stability and is not prone to failure, which helps ensure the service life of the sound-generating device. Of course, in other embodiments, the centering support 340 can also be in other structural forms. For example, the annular connecting portion 3411 can be replaced by a straight connecting portion, with at least one connecting foot 3412 at each end of the straight connecting portion. Alternatively, the annular connecting portion 3411 can be replaced by multiple straight connecting portions arranged in a cross pattern, with one connecting foot 3412 at each end.

[0057] In one embodiment, please refer to the following: Figure 1 , Figures 4 to 7The vibration system 300 further includes a first frame 321, with the upper end of the first voice coil 320 connected to the first frame 321. The annular connecting portion 3411 is located on the side of the first frame 321 away from the first voice coil 320, i.e., the first frame 321 is located between the first voice coil 320 and the annular connecting portion 3411. In this way, the position of the first voice coil 320 within the magnetic gap can be adjusted by the first frame 321, ensuring that the first voice coil 320 is located in an area with dense magnetic field lines, thus improving the sound sensitivity of the sound-generating device. Furthermore, it also ensures the structural stability and service life of the first voice coil 320. The annular connecting portion 3411, located between the first frame 321 and the diaphragm 310, can stably and effectively transmit stabilizing force to the first voice coil 320. Moreover, the annular connecting portion 3411 does not directly contact the first voice coil 320 and is not directly affected by the heat generated by the first voice coil 320, which helps ensure the structural stability of the centering support 340. During the manufacturing process, the first frame 321 and the first voice coil 320 can be pre-assembled, ensuring the production and assembly efficiency of the sound-generating device. Of course, in other embodiments, the annular connecting part 3411 may be disposed between the first frame 321 and the first voice coil 320.

[0058] In one embodiment, please refer to the following: Figure 1 , Figure 2 , Figures 4 to 7 The vibration system 300 further includes a second frame 331, the upper end of the second voice coil 330 is connected to the second frame 331, and part of the connecting foot 3412 is located between the second frame 331 and the second voice coil 330. Thus, the position of the second voice coil 330 within the magnetic gap can be adjusted by the second frame 331, ensuring that the second voice coil 330 is located in an area with dense magnetic field lines, improving the sound-generating sensitivity of the sound-generating device. The connecting foot 3412 passes between the second frame 331 and the diaphragm 310, and has a portion located between the second frame 331 and the diaphragm 310, thereby enabling the centering support 340 to stably and effectively transmit stabilizing force to the second voice coil 330. Furthermore, the annular second frame 331 is directly connected to the diaphragm 310, allowing it to fit well against the diaphragm 310 and ensuring the uniformity of vibration throughout the diaphragm 310. Of course, in other embodiments, the connecting leg 3412 may be inserted between the second frame 331 and the diaphragm 310, and the second frame 331 may be provided with a groove to avoid the connecting leg 3412.

[0059] In one embodiment, please refer to the following: Figure 1 , Figure 2 , Figures 4 to 7The connecting foot 3412, at its end away from the annular connecting portion 3411, has a connecting step 3413. The second frame 331 is sandwiched between the connecting step 3413 and the diaphragm 310. Thus, the connecting step 3413 provides a positioning function for the connection between the second frame 331 and the connecting foot 3412, allowing the second frame 331 to connect to the same position on multiple connecting feet 3412, ensuring consistent force distribution across multiple circumferential locations on the second frame 331, thereby ensuring the vibration stability of the second voice coil 330. Furthermore, this structural arrangement allows for a more compact fit between the second frame 331 and the connecting step 3413, reducing the occupied vibration space. Additionally, the step surface of the connecting step 3413 can fit against the inner circumference of the second frame 331, improving the connection stability between the connecting foot 3412 and the second frame 331. Without loss of generality, the connecting leg 3412 between the connecting step 3413 and the annular connecting portion 3411 extends obliquely to achieve a height transition from the annular connecting portion 3411 to the connecting step 3413, allowing the former to connect to the upper end face of the first frame 321 and the latter to connect to the lower end face of the second frame 331, while ensuring the structural stability of the centering support 340. Alternatively, in other embodiments, the connecting leg 3412 may have a groove structure at a corresponding position for the second frame 331 to engage.

[0060] In one embodiment, please refer to the following: Figure 1 , Figure 2 , Figures 4 to 7 The first connecting portion 341 further includes a transition section 3414 that connects the connecting leg 3412 and the elastic portion 343 respectively. At least a portion of the transition section 3414 extends along the vibration direction of the vibration system 300, and the transition section 3414 is located inside or outside the second voice coil 330. This allows the elastic portion 343 and the first connecting portion 341 to be located on different horizontal planes, enabling them to center the voice coil from different positions, thereby improving the vibration stability of the vibration system 300. Alternatively, in other embodiments, the elastic portion 343 itself may extend along the vibration direction of the vibration system 300.

[0061] Furthermore, please refer to the following: Figures 1 to 7The vibration system 300 further includes a second frame 331, which comprises an annular frame body 3311 and frame extensions 3312 spaced apart along the circumferential direction of the frame body 3311. The top of the second voice coil 330 is connected to the frame body 3311, and the transition section 3414 is fitted and connected to the frame extensions 3312. This increases the contact area between the centering support 340 and the second frame 331, enabling the centering support 340 to reliably transmit stabilizing force to the second voice coil 330. Simultaneously, the second frame 331 has higher structural strength, and the transition section 3414 of the centering support 340, fitted to the frame extensions 3312, enhances the structural stability of the centering support 340. Alternatively, in other embodiments, the structural stability of the centering support 340 can be ensured by strengthening the structural strength of the transition section 3414.

[0062] Specifically, both the transition section 3414 and the frame extension 3312 extend along the vibration direction of the vibration system 300. That is, the transition section 3414 and the frame extension 3312 have no radial extension, or a very small radial extension, which helps to reduce the radial dimension of the sound-generating device and facilitates miniaturization of the sound-generating device. Of course, in other embodiments, the transition section 3414 and the frame extension 3312 may also have portions extending in a horizontal direction.

[0063] The adapter segment 3414 can be located inside or outside the second voice coil 330, and the frame extension 3312 is located inside or outside the second voice coil 330 corresponding to the adapter segment 3414, for the adapter segment 3414 to be fitted and connected. Without loss of generality, the adapter segment 3414 and the frame extension 3312 are bonded together to ensure reliable fixation of the adapter segment 3414 and the frame extension 3312. Currently, the adapter segment 3414 and the frame extension 3312 can also be fixed together by a snap-fit ​​method.

[0064] Specifically, when the transition section 3414 is located outside the second voice coil 330, the skeleton extension 3312 will also be located outside the second voice coil 330. In this case, the transition section 3414 will be between the second voice coil 330 and the skeleton extension 3312, and the position of the first connecting part 341 connecting the second voice coil 330 will be between the position of the first connecting part 341 connecting the transition section 3414 and the first voice coil 320. When the transition section 3414 is located inside the second voice coil 330, the skeleton extension 3312 will also be located inside the second voice coil 330. In this case, the transition section 3414 can be located between the second voice coil 330 and the skeleton extension 3312, or the skeleton extension 3312 can be located between the second voice coil 330 and the transition section 3414, and the position of the first connecting part 341 connecting the transition section 3414 will be between the position of the first connecting part 341 connecting the first voice coil 320 and the second voice coil 330.

[0065] In one embodiment, the first connecting portion 341 is provided with a plurality of first pads, and the leads of the first voice coil 320 and the second voice coil 330 are electrically connected to the first pads. The second connecting portion 342 is provided with second pads for electrical connection to an external power source. It can be understood that the electrical connection between the first and second pads allows the first and second voice coils 320 and 330 to be electrically connected to an external power source through the circuitry on the centering support 340. In this way, the centering support 340 can be reused as a conductive element to achieve electrical connection between the voice coils and the external power source, which simplifies the structure of the sound-generating device and facilitates the layout of the internal structure of the sound-generating device. Of course, in other embodiments, the first and second voice coils 320 and 330 can also be connected to an external power source through other conductive elements.

[0066] In one embodiment, the first connecting portion 341 includes an annular connecting portion 3411 and connecting legs 3412 extending outward from the annular connecting portion 3411. Multiple connecting legs 3412 are arranged at intervals along the circumference of the annular connecting portion 3411. Each connecting leg 3412 is sequentially connected to an elastic portion 343 and a second connecting portion 342. The upper end of the first voice coil 320 is connected to the annular connecting portion 3411, and the upper end of the second voice coil 330 is connected to multiple connecting legs 3412. The first pad is disposed on the connecting leg 3412. The connecting foot 3412 is relatively close to both the first voice coil 320 and the second voice coil 330. The first pad on it facilitates the connection of the leads of the first voice coil 320 and the second voice coil 330. Specifically, the first pad on the connecting foot 3412 located between the first voice coil 320 and the second voice coil 330 further facilitates the connection of their leads. Of course, the centering support 340 can also have a corresponding structure with the first pad on the outer side of the second voice coil 330 or the inner side of the first voice coil 320.

[0067] Specifically, the first voice coil 320 and the second voice coil 330 can each be provided with two leads, or the first voice coil 320 and the second voice coil 330 can be formed by winding the same wire sequentially. There is a connecting line between the first voice coil 320 and the second voice coil 330. The first voice coil 320 and the second voice coil 330 are each provided with one lead. The number of first pads can be set to correspond to the number of leads. The number of first pads can also be less than the number of leads. Multiple electrical connection points can be provided on the first pads.

[0068] Without loss of generality, the plurality of first pads include a first input pad for connecting the input lead of the first voice coil 320, a first output pad for connecting the output lead of the first voice coil 320, a second input pad for connecting the input lead of the second voice coil 330, and a second output pad for connecting the output lead of the second voice coil 330. The first input pad and the second input pad are provided corresponding to one of the connecting pins 3412, and the first output pad and the second output pad are provided corresponding to the other connecting pin 3412. The second connection portion 342 corresponding to these two connecting pins 3412 is provided with a second pad connected to the housing 100, and these two connecting pins 3412 are arranged adjacent to each other. In this way, it is convenient to arrange the circuit on the centering bracket 340 and to ensure that the electrical connection structure on the housing 100 is relatively concentrated, which facilitates the access of external lines. Furthermore, the first and second input pads can be spaced apart or integrated into a single pad. This pad has two access points for the input leads of the first voice coil 320 and the second voice coil 330 to connect, respectively. The first and second output pads are arranged similarly. Of course, in other embodiments, the four pads can also be located on the four connecting pins 3412.

[0069] In one embodiment, please refer to Figure 1 and Figure 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 with 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 the first side magnetic circuit portion 230. Without loss of generality, the central magnetic circuit portion 220 includes a central magnet 221 and a central washer 222, the first side magnetic circuit portion 230 includes a first side magnet 231 and a first side washer 232, and the second side magnetic circuit portion 240 includes a second side magnet 241 and a second side washer 242.

[0070] 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, the production cost of the sound-generating device is reduced, and the radial dimension of the sound-generating device is also reduced. 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, and 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, which can also achieve the purpose of reducing the radial dimension.

[0071] In one embodiment, multiple elastic portions 343 are provided corresponding to the second connecting portions 342, and the multiple elastic portions 343 are arranged at circumferential intervals along the first connecting portion 341; the second side magnetic circuit portion 240 is provided with multiple clearance notches 243 communicating with the second magnetic gap 202, and one elastic portion 343 is correspondingly provided with one clearance notch 243. In this embodiment, the clearance notches 243 can avoid the elastic portions 343. When the elastic portions 343 are driven and move in the vibration direction of the vibration system 300, the clearance notches 243 can provide sufficient movement space for the elastic portions 343, so that the elastic portions 343 are not interfered with, thereby ensuring that the movement of the voice coil and the diaphragm 310 is not affected. Moreover, multiple elastic portions 343 can center the voice coil from multiple angles, thereby further improving the operational stability of the vibration system. Specifically, both the second side magnet 241 and the second side washer 242 are provided with clearance notches 243. Further, please refer to the figures and Figure 8 The first washer 232 can also be provided with a clearance structure 2321 to avoid related structures of the first connecting part 341, such as the connecting leg 3412. In this way, the internal structure of the sound-generating device can be arranged compactly and without interference. Of course, in other embodiments, the elastic part 343 and the magnetic circuit structure can also be staggered.

[0072] The present invention also proposes an electronic device including 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, which will not be elaborated here. Optionally, the electronic device can be headphones, mobile phones, televisions, computers, tablets, smart wearable devices, etc., and is not limited thereto.

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

Claims

1. A sound producing device, characterized by, The application relates to a loudspeaker, which comprises: a shell; a magnetic circuit system provided with a first magnetic gap and a second magnetic gap arranged in sequence from inside to outside; a vibration system comprising a diaphragm, a first voice coil, a second voice coil and a centering bracket, the diaphragm being arranged opposite to the magnetic circuit system, the shell connecting the magnetic circuit system and the diaphragm, the centering bracket comprising a first connecting part, an elastic part and a second connecting part, the first connecting part being connected to the diaphragm and connected to upper ends of the first voice coil and the second voice coil, the second connecting part being connected to the shell, the first connecting part and the elastic part being located in different horizontal planes along a vibration direction of the vibration system, a lower end of the first voice coil being arranged corresponding to the first magnetic gap, and a lower end of the second voice coil being arranged corresponding to the second magnetic gap; the diaphragm comprising a diaphragm body and a vibration plate, a central part of the diaphragm body being provided with an inner ring hole, and the vibration plate being arranged in the inner ring hole and connected to the diaphragm body; the first connecting part is provided with a plurality of first solder pads, lead wires of the first voice coil and the second voice coil being electrically connected to the first solder pads, and the second connecting part is provided with a second solder pad for electrically connecting to an external power supply; the first connecting part comprises a ring-shaped connecting part and connecting legs extending outward from the ring-shaped connecting part, a plurality of the connecting legs are arranged in sequence along a circumferential direction of the ring-shaped connecting part, each of the connecting legs is sequentially connected to one of the elastic parts and one of the second connecting parts, upper ends of the first voice coil are connected to the ring-shaped connecting part, and upper ends of the second voice coil are connected to the connecting legs; and the first solder pads are arranged on the connecting legs.

2. The sound production device of claim 1, wherein The vibration system further comprises a first skeleton, the upper ends of the first voice coil are connected to the first skeleton, and the ring-shaped connecting part is located on a side of the first skeleton away from the first voice coil.

3. The sound production device of claim 1, wherein The vibration system further comprises a second skeleton, the upper ends of the second voice coil are connected to the second skeleton, and part of the connecting legs are located between the second skeleton and the second voice coil.

4. The sound production device of claim 3, wherein An end of the connecting leg away from the ring-shaped connecting part is provided with a connecting step, and the second skeleton is clamped between the connecting step and the diaphragm.

5. The sound production device of claim 1, wherein, The first connecting part further comprises a transition section connecting the connecting legs and the elastic parts, at least part of the transition section extends along the vibration direction of the vibration system, and the transition section is located on an inner side or an outer side of the second voice coil.

6. The sound production device of claim 5, wherein, The vibration system further comprises a second skeleton, the second skeleton comprises a ring-shaped skeleton body and skeleton extension members arranged in sequence along a circumferential direction of the skeleton body, a top of the second voice coil is connected to the skeleton body, and the transition section is connected to the skeleton extension members in a fit mode.

7. The sound production device of claim 6, wherein The transition section and the skeleton extension members both extend along the vibration direction of the vibration system; and / or, the transition section is located between the skeleton extension members and the second voice coil; and / or, the transition section and the skeleton extension members are both located on an outer side of the second voice coil; and / or, the transition section and the skeleton extension members are connected in a bonding mode.

8. The sound production device of claim 1, wherein, The magnetic circuit system comprises a magnetic yoke, a center magnetic circuit part, a first side magnetic circuit part and a second side magnetic circuit part arranged on the same side of the magnetic yoke, the first side magnetic circuit part is arranged around the center magnetic circuit part and a first magnetic gap is formed between the center magnetic circuit part and the first side magnetic circuit part, and the second side magnetic circuit part is arranged around the first side magnetic circuit part and a second magnetic gap is formed between the first side magnetic circuit part and the second side magnetic circuit part.

9. The sound production device of claim 8, wherein, The second side magnetic circuit part is provided with a plurality of avoiding notches communicating with the second magnetic gap, and one elastic part is arranged in one avoiding notch.

10. An electronic device, comprising: The sound production device comprises the sound production device as claimed in any one of claims 1 to 9.

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