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 at least two first magnetic gaps arranged side by side and a second magnetic gap arranged at the periphery of the at least two first magnetic gaps, the vibration system comprises a diaphragm, a first voice coil, a second voice coil and a centering bracket, the first voice coil is provided with at least two corresponding to the first magnetic gaps, the diaphragm is arranged opposite to the magnetic circuit system, the shell is connected to the magnetic circuit system and the diaphragm, the centering bracket 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 second voice coil and the upper end of each first voice coil, the second connecting part is connected to the shell, and the first connecting part and the elastic part are located in different horizontal planes along the vibration direction of the vibration system. The technical scheme of the application aims to improve the vibration stability of the vibration system of the sound production device and the product BL value, and improve the sound production effect.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic equipment, and in particular to a sound-generating device and an electronic device. Background Art

[0002] Sound-generating devices are important electroacoustic transducer components in consumer electronics, and are widely used as speakers, receivers, and headphones. In related technologies, to achieve high performance and large amplitude, a sound-generating device with multiple voice coils has been proposed, whereby multiple voice coils synchronously drive a diaphragm to vibrate. While this structure can increase the amplitude and sensitivity of the sound-generating device, the multiple voice coils complicate the structure of the sound-generating device, increasing the difficulty of setting up the corresponding centering structure, thereby affecting the centering effect of the centering support. Consequently, maintaining the vibration stability of a large-amplitude vibration system has become an urgent issue. Summary of the Invention

[0003] The main purpose of the present invention is to provide a sound-generating device, aiming to improve the vibration stability and product BL value of the vibration system of the sound-generating device and enhance the sound effect.

[0004] To achieve the above-mentioned purpose, the sound-generating device proposed by the present invention comprises:

[0005] shell;

[0006] A magnetic circuit system comprising at least two first magnetic gaps arranged side by side and a second magnetic gap arranged outside the at least two first magnetic gaps; and

[0007] A vibration system includes a diaphragm, a first voice coil, a second voice coil, and a centering support. At least two first voice coils are provided corresponding to the first magnetic gap. The diaphragm is arranged opposite to the magnetic circuit system. The 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 to the second voice coil and the upper end of each of the first 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 arranged corresponding to the first magnetic gap, and the lower end of the second voice coil is arranged 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, and a plurality of the connecting legs are arranged at intervals along the circumference of the annular connecting portion, and each of the connecting legs is sequentially connected to one of the elastic portions and one of the second connecting portions, and the upper ends of at least two of the first voice coils are connected to the annular connecting portion and are arranged at intervals in the longitudinal direction of the annular connecting portion, and the upper end of the second voice coil is connected to the plurality of 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 a side of the first frame away from the first voice coil.

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

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

[0012] In one embodiment, the first connecting portion further includes a transition section respectively connecting the connecting leg and the elastic portion, at least a portion of the transition section extends along the vibration direction of the vibration system, and the transition section is located on the inner side or the outer side of the second voice coil.

[0013] In one embodiment, the vibration system also includes a second skeleton, the second skeleton includes an annular skeleton body and skeleton extensions spaced apart along the circumferential direction of the skeleton body, the top of the second voice coil is connected to the skeleton body, and the transition section is fit-fittingly connected to the skeleton extensions.

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

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

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

[0017] In one embodiment, the transition section is adhesively connected to the skeleton extension.

[0018] In one embodiment, the second voice coil is configured as a special-shaped voice coil having a concave curved section provided at a position corresponding to the interval between two adjacent first voice coils.

[0019] In one embodiment, the first connection portion is provided with a plurality of first pads, the second voice coil and leads of each of the first voice coils are electrically connected to the first pads, and the second connection portion is provided with a second pad for electrically connecting to an external power supply.

[0020] In one embodiment, the first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion, and a plurality of the connecting legs are arranged at intervals along the circumference of the annular connecting portion, each of the connecting legs is sequentially connected to one of the elastic portions and one of the second connecting portions, the upper ends of at least two of the first voice coils are connected to the annular connecting portion, and are arranged at intervals in the longitudinal direction of the annular connecting portion, and the upper end of the second voice coil is connected to a plurality of the connecting legs; the first soldering pad is provided on the connecting legs.

[0021] 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 arranged on the same side of the magnetic yoke, the central magnetic circuit portion is two and arranged side by side, the first side magnetic circuit portion is two and arranged one-to-one with the corresponding central magnetic circuit portion, and a first magnetic gap is formed between the corresponding central magnetic circuit portion, and the second side magnetic circuit portion is arranged with an interval around the two first side magnetic circuit portions to form the second magnetic gap on the inner side of the second side magnetic circuit portion.

[0022] In one embodiment, the first side magnetic circuit portion includes a plurality of first side magnets connected end to end, the plurality of first side magnets include a central side magnet located between two adjacent central magnetic circuit portions, and the two adjacent first side magnetic circuit portions share the central side magnet.

[0023] In one embodiment, the elastic portion is 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 path portion is provided with a plurality of avoidance gaps connected to the second magnetic gap, and one elastic portion is correspondingly provided in one of the avoidance gaps.

[0024] The present invention also provides an electronic device comprising the aforementioned sound-generating device.

[0025] In the technical solution of the present invention, by arranging at least two first voice coils side by side, the product BL value of the sound-emitting device can be increased, the sound-emitting effect can be improved, and the combined area of ​​the voice coil and the diaphragm can be increased, and the combined position of the voice coil and the diaphragm is increased, which is beneficial to increasing the amplitude of the vibration system and making the position of the voice coil acting on the diaphragm more evenly dispersed, which is beneficial to ensuring the vibration stability of the vibration system.

[0026] The first connection portion of the centering damper 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 connection portion of the centering damper is connected to the housing, enabling the housing to provide an additional fulcrum for the diaphragm, the first voice coil, and the second voice coil. An elastic portion is present between the first connection portion and the housing. While ensuring that the first connection 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. As a result, the centering damper 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 performance of the sound-generating device. Furthermore, since the first connection portion is simultaneously connected to the diaphragm, the first voice coil, and the second voice coil, it can ensure the synchronization of the vibrations of the first and second voice coils, further enhancing the sound performance of the sound-generating device.

[0027] In addition, since the elastic portion and the first connecting portion are located at different horizontal planes, the elastic portion is not likely to interfere with the diaphragm. Moreover, the first connecting portion and the elastic portion can center the voice coil from different positions, ensuring that the voice coil performs precise linear motion in the vertical direction, reducing deflection or lateral displacement, thereby improving the sound quality, and conveniently adjusting the natural resonant frequency of the centering support plate to keep it away from the operating frequency band of the sound-emitting device, thereby reducing the impact of unnecessary resonance on the sound quality, and can disperse stress points to avoid material fatigue or damage caused by long-term use, thereby improving the durability of the centering support plate and the reliability of the entire sound-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the explosion structure of an embodiment of the sound-generating device of the present invention;

[0030] Figure 2 This is a structural diagram of an embodiment of a centering support plate of a sound-generating device of the present invention;

[0031] Figure 3 This is a schematic structural diagram of an embodiment of a second skeleton of the sound-generating device of the present invention;

[0032] Figure 4 A schematic diagram of the assembly state of the local structure of an embodiment of the sound-generating device of the present invention;

[0033] Figure 5 for Figure 4 A partial enlarged view of the

[0034] Figure 6 for Figure 4 Another partial enlarged view in the figure;

[0035] Figure 7 A view of the sound-generating device of the present invention from the perspective of the vibration direction of the vibration system;

[0036] Figure 8 for Figure 7 A schematic cross-sectional view of an embodiment taken along line vv;

[0037] Figure 9 A schematic diagram of an embodiment of the structure of the sound-generating device of the present invention after removing the magnetic yoke;

[0038] Figure 10 FIG. 1 is a schematic diagram of another embodiment of the structure of the sound-generating device of the present invention after removing the magnetic yoke. FIG.

[0039] Description of Figure Numbers:

[0040] 100, shell;

[0041] 200, magnetic circuit system; 201, first magnetic gap; 202, second magnetic gap;

[0042] 210, magnetic yoke;

[0043] 220, central magnetic circuit; 221, central magnet; 222, central washer;

[0044] 230, first side magnetic circuit portion; 231, first side magnet; 2311, center side magnet; 232, first side washer; 2321, avoidance structure;

[0045] 240, second side magnetic circuit portion; 241, second side magnet; 242, second side washer; 243, avoidance gap;

[0046] 300, vibration system;

[0047] 310, diaphragm; 311, diaphragm body; 312, vibration plate;

[0048] 320, first voice coil; 321, first frame; 325, lead wire;

[0049] 330, second voice coil; 331, second frame; 3311, frame body; 3312, frame extension; 332, curved section;

[0050] 340. Centering support piece; 341. First connecting part; 3411. Annular connecting part; 3412. Connecting support foot; 3413. Connecting step; 3414. Transition section; 342. Second connecting part; 343. Elastic part.

[0051] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0053] 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 position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The present invention provides a sound-generating device.

[0056] Reference Figure 1 、 Figure 2 and Figures 4 to 10 In one embodiment of the present invention, the sound-generating device includes:

[0057] Housing 100;

[0058] The magnetic circuit system 200 includes at least two first magnetic gaps 201 arranged side by side and a second magnetic gap 202 arranged outside the at least two first magnetic gaps 201; and

[0059] The vibration system 300 includes a diaphragm 310, a first voice coil 320, a second voice coil 330, and a centering support 340. At least two first voice coils 320 are provided corresponding to the first magnetic gap 201. The diaphragm 310 is arranged opposite 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 second voice coil 330 and the upper end of each of the first voice coils 320. 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 arranged corresponding to the first magnetic gap 201, and the lower end of the second voice coil 330 is arranged corresponding to the second magnetic gap 202. Among them, the elastic part 343 may include at least one bend, or may be wavy, so as to have the ability to deform and restore deformation. The diaphragm 310 may include a diaphragm 310 body and a vibration plate 312. An inner ring hole is provided in the center of the diaphragm 310 body, and the vibration plate 312 is provided in the inner ring hole and is connected to the diaphragm 310 body.

[0060] In the technical solution of the present invention, by providing at least two side-by-side first voice coils 320, the product BL value of the sound-producing device can be increased, thereby improving the sound-producing effect. Moreover, the combined area between the voice coil and the diaphragm 310 can be increased, and the combined position of the voice coil and the diaphragm 310 is increased, which is beneficial to improving the amplitude of the vibration system 300 and making the action position of the voice coil on the diaphragm 310 more evenly dispersed, which is beneficial to ensuring the vibration stability of the vibration system 300.

[0061] The first connecting portion 341 of the centering support 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 340 is connected to the shell, so that the shell 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 shell. While ensuring that the first connecting portion 341 can move relative to the shell with the diaphragm 310 and the voice coil, the elastic portion 343 can also absorb vibration energy in other directions. Therefore, the centering support 340 can effectively limit the displacement of the first voice coil 320, the second voice coil 330 and the diaphragm 310 in the non-vibration direction, thereby maintaining the vibration stability of the vibration system 300 and ensuring the sound performance of the sound-generating device. At the same time, since the first connecting portion 341 is simultaneously connected to the diaphragm 310 , the first voice coil 320 and the second voice coil 330 , the vibration synchronization of the first voice coil 320 and the second voice coil 330 can be ensured, thereby further ensuring the sound performance of the sound generating device.

[0062] In addition, since the elastic portion 343 and the first connecting portion 341 are located at different horizontal planes, the elastic portion 343 is not likely to interfere with the diaphragm 310. Moreover, the first connecting portion 341 and the elastic portion 343 can center the voice coil from different positions, ensuring that the voice coil performs precise linear motion in the vertical direction, reducing deflection or lateral displacement, thereby improving the sound quality, and conveniently adjusting the natural resonant frequency of the centering support 340 to keep it away from the operating frequency band of the sound-emitting device, thereby reducing the impact of unnecessary resonance on the sound quality, and can disperse stress points to avoid material fatigue or damage caused by long-term use, thereby improving the durability of the centering support 340 and the reliability of the entire sound-emitting device.

[0063] It should be noted that the up and down directions in the present invention are based on the direction of the sound emitting device. Figure 1 and Figure 8 The definition in the illustrated state essentially refers to the vibration direction of the vibration system 300, with the diaphragm 310 positioned at the top and the magnetic circuit system 200 at the bottom. The upper end of the voice coil faces the diaphragm 310, while the lower end faces away from it. Furthermore, the lower end of the first voice coil 320 corresponds to the first magnetic gap 201, while the lower end of the second voice coil 330 corresponds to the second magnetic gap 202. This means that the lower end of the first voice coil 320 can be inserted into the first magnetic gap 201, or alternatively, can be located above the first magnetic gap 201. Similarly, the lower end of the second voice coil 330 can be inserted into or located above the second magnetic gap 202.

[0064] In one embodiment, see Figure 1 、 Figure 2 and Figure 4The first connecting portion 341 includes an annular connecting portion 3411 and connecting legs 3412 extending outward from the annular connecting portion 3411. A plurality of 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 ends of at least two first voice coils 320 are connected to the annular connecting portion 3411 and are spaced apart along the length of the annular connecting portion 3411. The upper end of the second voice coil 330 is connected to the plurality of connecting legs 3412. In this manner, the centering support 340 can provide uniform stabilizing force at multiple locations along the circumference of the voice coils, reliably maintaining the stable vibration of the first and second voice coils 320, 330, and ensuring the sound performance of the sound-generating device. Furthermore, the centering support 340 is structurally stable and not prone to failure, which helps to ensure the service life of the sound-generating device. Furthermore, the annular connecting portion 3411 and each first voice coil 320 can have a sufficiently large connection area, so that the centering damper 340 can provide sufficient stabilizing force for each first voice coil 320 through the annular connecting portion 3411, thereby ensuring the vibration stability of the vibration system 300. Of course, in other embodiments, the centering damper 340 can also have other structural forms. For example, the annular connecting portion 3411 can be replaced by a linear connecting portion, the linear connecting portion extending in a direction parallel to the arrangement direction of the multiple first voice coils 320, the linear connecting portion connecting both sides of each first voice coil 320, and at least one connecting leg 3412 being provided at each end of the linear connecting portion. Alternatively, the annular connecting portion 3411 can be replaced by a plurality of cross-arranged linear connecting portions, each end of which is provided with a connecting leg 3412.

[0065] In one embodiment, please refer to Figures 4 to 8The vibration system 300 also includes a first frame 321. The upper end of the first voice coil 320 is connected to the first frame 321, and the annular connecting portion 3411 is located on the side of the first frame 321 facing away from the first voice coil 320. That is, the first frame 321 is located between the first voice coil 320 and the annular connecting portion 3411. In this way, the first frame 321 can be used to adjust the position of the first voice coil 320 within the magnetic gap, ensuring that the first voice coil 320 is located in an area with dense magnetic flux lines, thereby improving the sound sensitivity of the sound-generating device. Furthermore, the structural stability and service life of the first voice coil 320 are ensured. The annular connecting portion 3411 is located between the first frame 321 and the diaphragm 310, stably and effectively transmitting stabilizing force to the first voice coil 320. Furthermore, 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, thereby ensuring the structural stability of the centering plate 340. During the manufacturing process, the first frame 321 and the first voice coil 320 can be pre-assembled to ensure the production and assembly efficiency of the sound-generating device. Of course, in other embodiments, the annular connecting portion 3411 can also be provided between the first frame 321 and the first voice coil 320.

[0066] In one embodiment, please refer to Figures 4 to 8 The vibration system 300 also includes a second frame 331. The upper end of the second voice coil 330 is connected to the second frame 331, and a portion of the connecting leg 3412 is located between the second frame 331 and the second voice coil 330. In this way, the second frame 331 can be used to adjust the position of the second voice coil 330 within the magnetic gap, ensuring that the second voice coil 330 is located in an area with dense magnetic flux lines, thereby improving the sound sensitivity of the sound-generating device. The connecting leg 3412 passes between the second frame 331 and the diaphragm 310, with a portion located between the second frame 331 and the diaphragm 310. This allows the centering arm 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, providing a good fit to the diaphragm 310 and ensuring uniform vibration across the diaphragm 310. Of course, in other embodiments, the connecting legs 3412 may be provided between the second frame 331 and the diaphragm 310 , and the second frame 331 may be provided with grooves corresponding to the connecting legs 3412 for avoiding the grooves.

[0067] In one embodiment, please refer to Figure 2 、 Figures 4 to 8A connecting step 3413 is provided at one end of the connecting leg 3412 away from the annular connecting portion 3411, and the second frame 331 is sandwiched between the connecting step 3413 and the diaphragm 310. In this way, the connecting step 3413 can provide a positioning function for the connection between the second frame 331 and the connecting leg 3412. The second frame 331 can also be connected to the same position of multiple connecting legs 3412, ensuring the consistency of force at multiple locations distributed in the circumferential direction of the second frame 331, thereby ensuring the vibration stability of the second voice coil 330. Moreover, the above-mentioned structural arrangement can also make the matching structure between the second frame 331 and the connecting step 3413 more compact, thereby reducing the occupied vibration space. In addition, the step surface of the connecting step 3413 can be attached to the inner circumference of the second frame 331 to improve the connection stability between the connecting leg 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, enabling the former to connect to the upper end surface of the first frame 321 and the latter to connect to the lower end surface of the second frame 331, while also ensuring the structural stability of the centering support 340. Of course, in other embodiments, the connecting leg 3412 may also be provided with a groove structure at a corresponding position for the second frame 331 to engage.

[0068] In one embodiment, please refer to Figure 2 、 Figures 4 to 8 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 at different horizontal planes. The elastic portion 343 and the first connecting portion 341 can center the voice coil from different positions, thereby improving the vibration stability of the vibration system 300. Of course, in other embodiments, the elastic portion 343 itself can also extend along the vibration direction of the vibration system 300.

[0069] In one embodiment, please refer to Figures 1 to 8The vibration system 300 also includes a second frame 331, which includes an annular frame body 3311 and frame extensions 3312 spaced apart circumferentially along 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 in close contact with the frame extension 3312. This increases the contact area between the centering damper 340 and the second frame 331, allowing the centering damper 340 to reliably transmit stabilizing force to the second voice coil 330. Furthermore, the structural strength of the second frame 331 is enhanced, and the transition section 3414 of the centering damper 340 is in close contact with the frame extension 3312, thereby improving the structural stability of the centering damper 340. Of course, in other embodiments, the structural strength of the transition section 3414 can be enhanced to ensure the structural stability of the centering damper 340.

[0070] Specifically, the transition section 3414 and the frame extension 3312 both 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 have very little radial extension. This facilitates reducing the radial dimensions of the sound-generating device and facilitating a miniaturized design of the sound-generating device. Of course, in other embodiments, the transition section 3414 and the frame extension 3312 may also have portions extending horizontally.

[0071] The transition section 3414 can be located inside or outside the second voice coil 330, and the skeleton extension 3312 is located inside or outside the second voice coil 330 corresponding to the transition section 3414, so that the transition section 3414 can be tightly connected. Without loss of generality, the transition section 3414 and the skeleton extension 3312 are adhesively connected to ensure a secure fixation between the transition section 3414 and the skeleton extension 3312. Currently, the transition section 3414 and the skeleton extension 3312 can also be fixed together by a snap-fit ​​connection.

[0072] Specifically, when the transition section 3414 is located on the outside of the second voice coil 330, the skeleton extension 3312 will also be located on the outside of the second voice coil 330. At this time, the transition section 3414 will be between the second voice coil 330 and the skeleton extension 3312, and the position where the first connecting portion 341 connects to the second voice coil 330 will be between the position where the first connecting portion 341 connects to the transition section 3414 and the first voice coil 320; when the transition section 3414 is located on the inside of the second voice coil 330, the skeleton extension 3312 will also be located on the inside of the second voice coil 330. At this time, 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 where the first connecting portion 341 connects to the transition section 3414 will be between the position where the first connecting portion 341 connects to the first voice coil 320 and the second voice coil 330.

[0073] In one embodiment, please refer to Figure 9 The second voice coil 330 is configured as a special-shaped voice coil with a concave curved section 332 provided at the interval between two adjacent first voice coils 320. In this way, the gap between two adjacent first voice coils 320 can be fully utilized, the wire length of the second voice coil 330 can be greatly increased, and the BL value of the product can be increased, thereby increasing the driving force that the second voice coil 330 can generate on the diaphragm 310, thereby increasing the amplitude of the vibration system 300 and the loudness of the sound-generating device. Of course, in other embodiments, please refer to Figure 10 The second voice coil 330 is set to be straight on the adjacent sides of the two adjacent first voice coils 320, so that the second voice coil 330 can maintain an equal distance from the magnet structures on both sides, thereby ensuring the uniformity of the driving force of the second voice coil 330 in the circumferential direction.

[0074] In one embodiment, please refer to Figure 9 and Figure 10 The first connection portion 341 is provided with a plurality of first soldering pads, and the second voice coil 330 and the leads 325 of each of the first voice coils 320 are electrically connected to the first soldering pads. The second connection portion 342 is provided with a second soldering pad for electrically connecting to an external power supply. It can be understood that the first soldering pad and the second soldering pad are electrically connected, so that the first voice coil 320 and the second voice coil 330 can be electrically connected to the external power supply through the circuit on the centering support plate 340. In this way, the centering support plate 340 can be reused as a conductive member to achieve electrical connection between the voice coil and the external power supply, which is conducive to simplifying the structure of the sound-generating device and facilitating the layout of the internal structure of the sound-generating device. Of course, in other embodiments, the first voice coil 320 and the second voice coil 330 can also be connected to the external power supply through another conductive member.

[0075] In one embodiment, please refer to Figure 9 and Figure 10The first connecting part 341 includes an annular connecting part 3411 and connecting legs 3412 extending outward from the annular connecting part 3411. A plurality of connecting legs 3412 are arranged at intervals along the circumference of the annular connecting part 3411. Each connecting leg 3412 is connected to an elastic part 343 and a second connecting part 342 in sequence. The upper ends of at least two first voice coils 320 are connected to the annular connecting part 3411 and are arranged at intervals in the longitudinal direction of the annular connecting part 3411. The upper end of the second voice coil 330 is connected to a plurality of connecting legs 3412, and the first soldering pad is provided on the connecting leg 3412. The connecting leg 3412 is relatively close to both the first voice coil 320 and the second voice coil 330. The first soldering pad disposed thereon facilitates connection of the leads 325 of the first and second voice coils 320, 330. In particular, the first soldering pad disposed on the connecting leg 3412 between the first and second voice coils 320, 330, further facilitates connection of the leads 325 of the first and second voice coils 320, 330. Of course, the centering support 340 may also be provided with a corresponding structure and a first soldering pad on the outside of the second voice coil 330 or the inside of the first voice coil 320.

[0076] Specifically, each first voice coil 320 and second voice coil 330 can be respectively provided with two lead wires 325, and at least two first voice coils 320 and second voice coils 330 can also be formed by winding the same wire in sequence. There is a connecting wire between the two first voice coils 320 and between the first voice coil 320 and the second voice coil 330. The first voice coil 320 and the second voice coil 330 are respectively provided with a lead wire 325. The number of first soldering pads can be set corresponding to the number of lead wires 325, and the number of first soldering pads can also be less than the number of lead wires 325, and multiple electrical connection points can be set on the first soldering pads.

[0077] Without loss of generality, the plurality of first solder pads include a first lead-in solder pad for connecting the lead-in wire of the first voice coil 320, a first lead-out solder pad for connecting the lead-out wire of the first voice coil 320, a second lead-in solder pad for connecting the lead-in wire of the second voice coil 330, and a second lead-out solder pad for connecting the lead-out wire of the second voice coil 330. The first lead-in solder pad and the second lead-in solder pad are provided corresponding to one of the connecting legs 3412, and the first lead-out solder pad and the second lead-out solder pad are provided corresponding to the other connecting leg 3412. The second connecting portion 342 corresponding to these two connecting legs 3412 is provided with a second solder pad connected to the housing 100, and these two connecting legs 3412 are arranged adjacent to each other. This facilitates the circuit layout on the centering support 340 and ensures that the electrical connection structure on the housing 100 is relatively centralized, facilitating external circuit access. Furthermore, the first lead-in pad and the second lead-in pad can be spaced apart or integrated into one pad, with two access points provided on the pad for connecting the lead-in wires of the first voice coil 320 and the second voice coil 330, respectively. The same applies to the first lead-out pad and the second lead-out pad. Of course, in other embodiments, the four pads can also be provided on the four connecting legs 3412.

[0078] In one embodiment, see Figures 4 to 8 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 central magnetic circuit portion 220 is provided in two parallel rows. The first side magnetic circuit portions 230 are provided in two rows, one-to-one, and are arranged to surround the corresponding central magnetic circuit portion 220, forming a first magnetic gap 201 between the corresponding central magnetic circuit portion 220. The second side magnetic circuit portions 240 are arranged to surround the two first side magnetic circuit portions 230, forming a second magnetic gap 202 inside the second side magnetic circuit portions 240. In this way, the second magnetic gap 202 can be formed by utilizing the first side magnetic circuit portions 230 and the second side magnetic circuit portion, simplifying the structure of the magnetic circuit system 200, reducing the production cost of the sound-generating device, and facilitating a reduction in the radial size of the sound-generating device. Of course, in other embodiments, the first magnetic gap 201 and the second magnetic gap 202 can be constructed separately by independent magnetic circuit groups, and the central magnetic circuit portion 220 of the second magnetic gap 202 can be stacked on the side magnetic circuit portion of the first magnetic gap 201, which can also achieve the purpose of reducing the radial size.

[0079] In one embodiment, see Figure 1 、 Figure 4 、 Figure 9 and Figure 10The first side magnetic circuit portion 230 includes a plurality of first side magnets 231 connected end to end in sequence, and the plurality of first side magnets 231 include a center side magnet 2311 located between two adjacent center magnetic circuit portions 220. The two adjacent first side magnetic circuit portions 230 share the center side magnet 2311. In this way, the center side magnet 2311 can be used to construct two first magnetic gaps 201, further simplifying the structure of the magnetic circuit system 200, reducing the production cost of the sound-generating device, and at the same time, helping to further reduce the radial size of the sound-generating device. Of course, in other embodiments, there may be no shared magnet between the two first magnetic gaps 201.

[0080] 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 .

[0081] In one embodiment, see Figure 1 、 Figure 2 and Figure 4 Multiple elastic portions 343 are provided, corresponding one-to-one with the second connecting portion 342, and are spaced apart circumferentially around the first connecting portion 341. The second side magnetic circuit portion 240 is provided with multiple escape notches 243 that connect to the second magnetic gap 202, with each elastic portion 343 corresponding to each escape notch 243. In this embodiment, the escape notches 243 allow for the first elastic portion 343 to escape. When the first elastic portion 343 is driven and moves in the vibration direction of the vibration system 300, the escape notches 243 provide sufficient space for the first elastic portion 343 to move, freeing it from interference and thus ensuring that the movement of the voice coil and diaphragm 310 is unaffected. Specifically, both the second side magnet 241 and the second side washer 242 are provided with escape notches 243. Furthermore, the first side washer 232 may also be provided with an escape structure 2321 to allow for the first inner connecting portion to escape. In this way, the internal structure of the sound-generating device can be arranged compactly without interfering with each other. Of course, in other embodiments, the first elastic portion 343 and the magnetic circuit structure can also be staggered.

[0082] The present invention also provides an electronic device including a sound-generating device. The specific structure of the sound-generating device is as described in the above embodiments. Since the electronic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. Optionally, the electronic device can be a headset, a mobile phone, a television, a computer, a pad, a smart wearable device, etc., without limitation here.

[0083] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: include: shell; A magnetic circuit system is provided with at least two first magnetic gaps arranged side by side and a second magnetic gap arranged outside the at least two first magnetic gaps; as well as A vibration system includes a diaphragm, a first voice coil, a second voice coil, and a centering support. At least two first voice coils are provided corresponding to the first magnetic gap. The diaphragm is arranged opposite to the magnetic circuit system. The 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 to the second voice coil and the upper end of each of the first 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 arranged corresponding to the first magnetic gap, and the lower end of the second voice coil is arranged corresponding to the second magnetic gap.

2. The sound-generating device according to claim 1, wherein: The first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion. A plurality of connecting legs are arranged at intervals along the circumference of the annular connecting portion. Each of the connecting legs is sequentially connected to one of the elastic portions and one of the second connecting portions. The upper ends of at least two of the first voice coils are connected to the annular connecting portion and are arranged at intervals in the longitudinal direction of the annular connecting portion. The upper end of the second voice coil is connected to a plurality of the connecting legs.

3. The sound-generating device according to claim 2, wherein: 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 a side of the first frame away from the first voice coil.

4. The sound-generating device according to claim 2, wherein: The vibration system further includes a second frame, the upper end of the second voice coil is connected to the second frame, and part of the connecting legs are located between the second frame and the second voice coil.

5. The sound-generating device according to claim 4, wherein: A connecting step is provided at one end of the connecting leg away from the annular connecting portion, and the second frame is clamped between the connecting step and the diaphragm.

6. The sound-generating device according to claim 2, wherein: The first connecting portion further includes a transition section respectively connecting the connecting legs and the elastic portion, at least a portion of the transition section extends along the vibration direction of the vibration system, and the transition section is located on the inner side or the outer side of the second voice coil.

7. The sound-generating device according to claim 6, wherein: The vibration system also includes a second skeleton, which includes an annular skeleton body and skeleton extensions spaced apart along the circumferential direction of the skeleton body. The top of the second voice coil is connected to the skeleton body, and the transition section is fittedly connected to the skeleton extensions.

8. The sound-generating device according to claim 7, wherein: The transition section and the skeleton extension both extend along the vibration direction of the vibration system; And / or, the transition section is located between the skeleton extension and the second voice coil; And / or, the transition section and the skeleton extension are both located outside the second voice coil; And / or, the transition section is adhesively connected to the skeleton extension piece.

9. The sound-generating device according to claim 1, wherein: The second voice coil is configured as a special-shaped voice coil having a concave curved section provided at a position corresponding to the interval between two adjacent first voice coils.

10. The sound-generating device according to claim 1, wherein: The first connection portion is provided with a plurality of first pads, the second voice coil and the leads of each of the first voice coils are electrically connected to the first pads, and the second connection portion is provided with a second pad for electrically connecting to an external power supply.

11. The sound generating device according to claim 10, wherein: The first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion. A plurality of connecting legs are arranged at intervals along the circumference of the annular connecting portion. Each connecting leg is sequentially connected to one of the elastic portions and one of the second connecting portions. The upper ends of at least two of the first voice coils are connected to the annular connecting portion and are arranged at intervals in the longitudinal direction of the annular connecting portion. The upper end of the second voice coil is connected to a plurality of the connecting legs. The first soldering pad is provided on the connecting legs.

12. The sound-generating device according to any one of claims 1 to 11, characterized in that: The magnetic circuit system includes a magnetic yoke and a central magnetic circuit portion, a first side magnetic circuit portion and a second side magnetic circuit portion arranged on the same side of the magnetic yoke. There are two central magnetic circuit portions and they are arranged side by side. There are two first side magnetic circuit portions and they are arranged one by one at intervals around the corresponding central magnetic circuit portion, and a first magnetic gap is formed between the corresponding central magnetic circuit portion. The second side magnetic circuit portion is arranged at intervals around the two first side magnetic circuit portions to form the second magnetic gap on the inner side of the second side magnetic circuit portion.

13. The sound generating device according to claim 12, wherein: The first side magnetic circuit portion includes a plurality of first side magnets connected end to end, the plurality of first side magnets includes a central side magnet located between two adjacent central magnetic circuit portions, and the two adjacent first side magnetic circuit portions share the central side magnet; and / or The elastic parts are provided in a one-to-one correspondence with the second connecting parts, and the multiple elastic parts are arranged at intervals along the circumference of the first connecting part; the second side magnetic path part is provided with a plurality of avoidance gaps connected to the second magnetic gap, and one elastic part is correspondingly provided in one avoidance gap.

14. An electronic device, characterized in that: Comprising the sound-generating device according to any one of claims 1 to 13.

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