Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, 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, and the vibration system comprises a vibrating diaphragm, a first voice coil, a second voice coil and a centering disk, the vibrating diaphragm and the magnetic circuit system are oppositely arranged, the shell is connected with the magnetic circuit system and the vibrating diaphragm, the centering disk comprises a first connecting part, an elastic part and a second connecting part, the first connecting part is connected to the vibrating diaphragm and is connected with the second voice coil and the upper end of each first voice coil, and the elastic part is connected with the second connecting part. The second connecting part is connected to the shell, and the first connecting part and the elastic part are located in different horizontal planes in the vibration direction of the vibration system. According to the technical scheme, the vibration stability of the vibration system of the sound production device and the product BL value are improved, and the sound production effect is improved.

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] The sound-generating device is an important electroacoustic transducer component in consumer electronic products, and is widely used as a speaker, receiver, earphone, etc. In the related art, in order to achieve high performance and large amplitude, a sound-generating device with multiple voice coils is proposed, that is, multiple voice coils synchronously drive a diaphragm to vibrate. Although the above structure can increase the amplitude and sound sensitivity of the sound-generating device, the setting of multiple voice coils makes the structure of the sound-generating device more complicated, increases the difficulty of setting the corresponding centering structure, and thus affects the centering effect of the centering support. On this basis, how to maintain the vibration stability of the large-amplitude vibration system has become an urgent problem to be solved. 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 improve the sound-generating effect.

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

[0005] shell;

[0006] 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; and

[0007] A vibration system includes a diaphragm, a first voice coil, a second voice coil and a centering support plate, wherein 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 plate 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 second voice coil and the upper ends 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 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 length 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, an 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, an 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 frame 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 fittedly 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 member.

[0018] In one embodiment, the second voice coil is configured as a special-shaped voice coil having a concave curved section disposed at a spacing position corresponding to 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 source.

[0020] In one embodiment, 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 length 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.

[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 number of the central magnetic circuit portions being two and arranged side by side, the number of the first side magnetic circuit portions being two and arranged one by one at intervals around the corresponding central magnetic circuit portion, and forming a first magnetic gap between the corresponding central magnetic circuit portion, and the second side magnetic circuit portions being 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.

[0022] In one embodiment, the first side magnetic circuit portion includes a plurality of first side magnets connected end to end in sequence, 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 plurality corresponding to the second connecting portion, and the plurality of the 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 of the elastic portions is correspondingly arranged 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 arranged 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 improving the amplitude of the vibration system and making the action position of the voice coil on the diaphragm more evenly dispersed, which is beneficial to ensuring the vibration stability of the vibration system.

[0026] The first connection part 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 connection part of the centering support is connected to the shell, so that the shell can provide an additional fulcrum for the diaphragm, the first voice coil and the second voice coil. There is an elastic part between the first connection part and the shell. While ensuring that the first connection part can move relative to the shell with the diaphragm and the voice coil, the elastic part 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 the non-vibration direction, so as to maintain the vibration stability of the vibration system and ensure the sound performance of the sound-generating device. At the same time, since the first connection part is connected to the diaphragm, the first voice coil and the second voice coil at the same time, the vibration synchronization of the first voice coil and the second voice coil can be ensured, so as to further ensure the sound performance of the sound-generating device.

[0027] In addition, since the elastic part and the first connecting part are located at different horizontal planes, the elastic part is not easy to interfere with the diaphragm, and the first connecting part and the elastic part can play a centering role on 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 quality of sound, and can conveniently adjust the inherent resonant frequency of the centering support plate to keep it away from the working 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 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 It is a structural schematic diagram of an embodiment of a centering support piece of a sound-generating device of the present invention;

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

[0032] Figure 4 It is 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 of the

[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 cut along vv;

[0037] Fig. 9 A schematic diagram of an embodiment of the structure of the sound-generating device of the present invention after the magnetic yoke is removed;

[0038] Fig.10 This is a schematic diagram of another embodiment of the structure of the sound-generating device of the present invention after the magnetic yoke is removed.

[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 portion; 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, bending section;

[0050] 340, centering support piece; 341, first connecting part; 3411, annular connecting part; 3412, connecting foot; 3413, connecting step; 3414, transition section; 342, second connecting part; 343, elastic part.

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

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 in a certain specific posture. If the specific posture changes, the directional indication 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the 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 contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The 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 comprises:

[0057] Housing 100;

[0058] The magnetic circuit system 200 is provided with 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 piece 340. At least two of the first voice coils 320 are provided corresponding to the first magnetic gap 201. The diaphragm 310 is arranged opposite to the magnetic circuit system 200. The housing 100 connects the magnetic circuit system 200 and the diaphragm 310. The centering support piece 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 ends 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, and may also 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. 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 setting at least two side-by-side first voice coils 320, 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 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 connection 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 to further ensure 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, and 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 can conveniently adjust the inherent resonant frequency of the centering support plate 340 to keep it away from the working 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 340 and the reliability of the entire sound-emitting device.

[0063] It should be noted that the up and down directions in the solution of the present invention are based on the direction of the sound-emitting device. Figure 1 and Figure 8 The state defined in the figure actually refers to the vibration direction of the vibration system 300, the diaphragm 310 is arranged at the top, the magnetic circuit system 200 is arranged at the bottom, the upper end of the voice coil faces the diaphragm 310, and the lower end faces away from the diaphragm 310. In addition, 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. 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 also be inserted into the second magnetic gap 202, or can be located above the second magnetic gap 202.

[0064] In one embodiment, see Figure 1 , Figure 2 and Figure 4The first connection part 341 includes an annular connection part 3411 and a connection leg 3412 extending outward from the annular connection part 3411. A plurality of the connection legs 3412 are arranged at intervals along the circumference of the annular connection part 3411. Each of the connection legs 3412 is sequentially connected to an elastic part 343 and a second connection part 342. The upper ends of at least two first voice coils 320 are connected to the annular connection part 3411 and are arranged at intervals in the length direction of the annular connection part 3411. The upper end of the second voice coil 330 is connected to a plurality of the connection legs 3412. In this way, the centering support 340 can provide uniform stabilizing force at multiple locations in the circumference of the voice coil, can reliably maintain the stability of the vibration of the first voice coil 320 and the second voice coil 330, and ensure the sound performance of the sound-generating device. The structure of the centering support 340 is highly stable and not prone to failure, which is conducive to ensuring the service life of the sound-generating device. Furthermore, it can be ensured that the annular connection portion 3411 and each first voice coil 320 have a sufficiently large connection area, so that the centering support 340 can provide sufficient stabilizing force for each first voice coil 320 through the annular connection portion 3411, so as to ensure the vibration stability of the vibration system 300. Of course, in other embodiments, the centering support 340 can also be other structural forms, for example, the annular connection portion 3411 is replaced by a linear connection portion, the extension direction of the linear connection portion is parallel to the arrangement direction of the plurality of first voice coils 320, the linear connection portion is connected to both sides of each first voice coil 320, and at least one connecting leg 3412 is provided at each end of the linear connection portion, or the annular connection portion 3411 is replaced by a plurality of cross-arranged linear connection portions, and a connecting leg 3412 is provided at each end.

[0065] In one embodiment, please refer to Figures 4 to 8The vibration system 300 further includes a first frame 321, the upper end of the first voice coil 320 is connected to the first frame 321, and the annular connection portion 3411 is located on the side of the first frame 321 away from the first voice coil 320, that is, the first frame 321 is located between the first voice coil 320 and the annular connection portion 3411. In this way, the position of the first voice coil 320 in the magnetic gap can be adjusted by the first frame 321 to ensure 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. In addition, the structural stability and service life of the first voice coil 320 can be guaranteed. The annular connection portion 3411 is located between the first frame 321 and the diaphragm 310, and can stably and effectively transmit the stabilizing force to the first voice coil 320. Moreover, the annular connection portion 3411 does not directly contact the first voice coil 320, and will not be directly affected by the heat generated by the first voice coil 320, which is conducive to ensuring the structural stability of the centering support 340. During the manufacturing process, the first frame 321 and the first voice coil 320 can be preassembled 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 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 leg 3412 is located between the second frame 331 and the second voice coil 330. In this way, the position of the second voice coil 330 in 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 flux lines, thereby improving the sound sensitivity of the sound-generating device, and the connecting leg 3412 passes between the second frame 331 and the diaphragm 310, and can have a part located between the second frame 331 and the diaphragm 310, so that the centering support 340 can stably and effectively transmit the stabilizing force to the second voice coil 330, and the annular second frame 331 is directly connected to the diaphragm 310, and can fit the diaphragm 310 well, thereby ensuring the uniformity of vibration of all parts of 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 for avoiding the connecting leg 3412 .

[0067] In one embodiment, please refer to Figure 2 , Figures 4 to 8, a connecting step 3413 is provided at one end of the connecting leg 3412 away from the annular connecting portion 3411, and the second skeleton 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 skeleton 331 and the connecting leg 3412, and the second skeleton 331 can be connected to the same position of multiple connecting legs 3412, thereby ensuring the force consistency of multiple locations of the second skeleton 331 distributed in the circumferential direction, thereby ensuring the vibration stability of the second voice coil 330. Moreover, the above structural setting can also make the matching structure between the second skeleton 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 skeleton 331 to improve the connection stability between the connecting leg 3412 and the second skeleton 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, so that the former can be connected to the upper end surface of the first frame 321, and the latter can be connected to the lower end surface of the second frame 331, while ensuring the structural stability of the centering support piece 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 be inserted.

[0068] In one embodiment, please refer to Figure 2 , Figures 4 to 8 , the first connection part 341 also includes a transition section 3414 respectively connecting the connection leg 3412 and the elastic part 343, at least part of the transition section 3414 extends along the vibration direction of the vibration system 300, and the transition section 3414 is located on the inner side or the outer side of the second voice coil 330. In this way, the elastic part 343 and the first connection part 341 can be located at different horizontal planes, and the elastic part 343 and the first connection part 341 can play a centering role on the voice coil from different positions, thereby improving the vibration stability of the vibration system 300. Of course, in other embodiments, the elastic part 343 itself can also extend along the vibration direction of the vibration system 300.

[0069] In one embodiment, please refer to Figures 1 to 8, the vibration system 300 also includes a second skeleton 331, the second skeleton 331 includes an annular skeleton body 3311 and skeleton extensions 3312 spaced apart along the circumferential direction of the skeleton body 3311, the top of the second voice coil 330 is connected to the skeleton body 3311, and the transition section 3414 is closely connected to the skeleton extension 3312. In this way, the contact area between the centering support piece 340 and the second skeleton 331 can be increased, so that the centering support piece 340 can reliably transmit the stabilizing force to the second voice coil 330. At the same time, the structural strength of the second skeleton 331 is higher, and the transition section 3414 of the centering support piece 340 is closely connected to the skeleton extension 3312, which can improve the structural stability of the centering support piece 340. Of course, in other embodiments, the structural strength of the transition section 3414 can be strengthened to ensure the structural stability of the centering support piece 340.

[0070] Specifically, the transition section 3414 and the skeleton extension 3312 both extend along the vibration direction of the vibration system 300. That is, the transition section 3414 and the skeleton extension 3312 have no radial extension or a very small radial extension, which is conducive to reducing the radial size of the sound-generating device and realizing a miniaturized design of the sound-generating device. Of course, in other embodiments, the transition section 3414 and the skeleton extension 3312 may also have a portion extending in the horizontal direction.

[0071] The transition section 3414 can be located on the inner side or the outer side of the second voice coil 330, and the skeleton extension 3312 is located on the inner side or the outer side of the second voice coil 330 corresponding to the transition section 3414, so as to be fitted and connected with the transition section 3414. Without loss of generality, the transition section 3414 is bonded and connected with the skeleton extension 3312 to ensure reliable fixation of the transition section 3414 and the skeleton extension 3312. Currently, the transition section 3414 and the skeleton extension 3312 can also be fixed by snapping.

[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 part 341 connects the second voice coil 330 will be between the position where the first connecting part 341 connects 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 part 341 connects the transition section 3414 will be between the position where the first connecting part 341 connects the first voice coil 320 and the second voice coil 330.

[0073] In one embodiment, please refer to Fig. 9 , the second voice coil 330 is configured as a special-shaped voice coil having a concave curved section 332 disposed 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, the product BL value can be increased, and the driving force that the second voice coil 330 can generate on the diaphragm 310 can be increased, so as to increase the amplitude of the vibration system 300 and the loudness of the sound-generating device. Of course, in other embodiments, please refer to Fig.10 The second voice coil 330 is arranged to be straight on adjacent sides of 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 Fig. 9 and Fig.10 , the first connection part 341 is provided with a plurality of first pads, the second voice coil 330 and the leads 325 of each of the first voice coils 320 are electrically connected to the first pads, and the second connection part 342 is provided with a second pad for electrically connecting to an external power supply. It can be understood that the first pad and the second 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 realize the 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 Fig. 9 and Fig.10The first connecting part 341 includes an annular connecting part 3411 and a connecting leg 3412 extending outward from the annular connecting part 3411, and a plurality of the connecting legs 3412 are arranged at intervals along the circumference of the annular connecting part 3411, and each of the connecting legs 3412 is connected to an elastic part 343 and a second connecting part 342 in sequence, and the upper ends of at least two of the first voice coils 320 are connected to the annular connecting part 3411, and are arranged at intervals in the length direction of the annular connecting part 3411, and the upper end of the second voice coil 330 is connected to a plurality of the connecting legs 3412, and the first soldering pad is provided on the connecting legs 3412. The connection leg 3412 is relatively close to the first voice coil 320 and the second voice coil 330, and the first pad disposed thereon can facilitate the connection of the leads 325 of the first voice coil 320 and the second voice coil 330. In particular, the connection leg 3412 with the first pad disposed between the first voice coil 320 and the second voice coil 330 can facilitate the connection of the leads 325 of the first voice coil 320 and the second voice coil 330. Of course, the centering support 340 can also form a corresponding structure to dispose the first 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 the second voice coil 330 may be respectively provided with two lead wires 325, and at least two first voice coils 320 and second voice coils 330 may also be formed by winding the same wire in sequence, and 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, and 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 may be set corresponding to the number of lead wires 325, the number of first soldering pads may also be less than the number of lead wires 325, and a plurality of electrical connection points may be set on the first soldering pads.

[0077] Without loss of generality, the plurality of first pads include a first lead-in pad for connecting the lead-in wire of the first voice coil 320, a first lead-out pad for connecting the lead-out wire of the first voice coil 320, a second lead-in pad for connecting the lead-in wire of the second voice coil 330, and a second lead-out pad for connecting the lead-out wire of the second voice coil 330. The first lead-in pad and the second lead-in pad are arranged corresponding to one of the connection legs 3412, the first lead-out pad and the second lead-out pad are arranged corresponding to the other connection leg 3412, and the second connection portion 342 corresponding to the two connection legs 3412 is provided with a second pad connected to the housing 100, and the two connection legs 3412 are arranged adjacent to each other, so that the circuit arrangement on the centering support 340 can be facilitated, and the electrical connection structure on the housing 100 can be relatively centrally arranged, which is convenient for external line access. Furthermore, the first lead-in pad and the second lead-in pad can be arranged at intervals, or can be integrated into one pad, and two access points are arranged on the pad, respectively for the lead-in leads of the first voice coil 320 and the second voice coil 330 to connect, and the first lead-out pad and the second lead-out pad are also referred to in the same way. Of course, in other embodiments, the above four pads can also be arranged on the four connecting legs 3412 respectively.

[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 arranged on the same side of the magnetic yoke 210. The central magnetic circuit portion 220 is two and arranged side by side. The first side magnetic circuit portion 230 is two and arranged one by one to surround the corresponding central magnetic circuit portion 220 at intervals, and a first magnetic gap 201 is formed between the corresponding central magnetic circuit portion 220. The second side magnetic circuit portion 240 is arranged to surround the two first side magnetic circuit portions 230 at intervals, so as to form the second magnetic gap 202 inside the second side magnetic circuit portion 240. In this way, the second magnetic gap 202 can be formed by using the first side magnetic circuit portion 230 and the second side magnetic circuit structure, which simplifies the structure of the magnetic circuit system 200, can reduce the production cost of the sound-generating device, and at the same time, is conducive to reducing the radial size of the sound-generating device. Of course, in other embodiments, the first magnetic gap 201 and the second magnetic gap 202 may be constructed separately by independent magnetic circuit groups, and the central magnetic circuit portion 220 of the second magnetic gap 202 may 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 , Fig. 9 and Fig.10, the first side magnetic circuit portion 230 includes a plurality of first side magnets 231 connected end to end in sequence, the plurality of first side magnets 231 include a center side magnet 2311 located between two adjacent center magnetic circuit portions 220, and 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, it is also possible that there is 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 , the elastic part 343 is provided with a plurality of the second connecting part 342 in a one-to-one correspondence, and the plurality of the elastic parts 343 are arranged at intervals along the circumference of the first connecting part 341; the second side magnetic circuit part 240 is provided with a plurality of avoidance gaps 243 connected to the second magnetic gap 202, and one elastic part 343 is correspondingly provided in one avoidance gap 243. In this embodiment, the first elastic part 343 can be avoided by the avoidance gap 243. When the first elastic part 343 is driven to move in the vibration direction of the vibration system 300, the avoidance gap 243 can provide sufficient movement space for the first elastic part 343, so that the first elastic part 343 is not interfered, thereby ensuring that the movement of the voice coil and the diaphragm 310 is not affected. Specifically, the second side magnet 241 and the second side washer 242 are both provided with avoidance gaps 243. Furthermore, the first side washer 232 can also be provided with an avoidance structure 2321 to avoid the first inner connecting part. 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 may be arranged in a staggered manner.

[0082] The present invention also proposes an electronic device, which includes a sound-generating device. The specific structure of the sound-generating device refers to the above embodiment. Since the electronic device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Optionally, the electronic device can be a headset, a mobile phone, a television, a computer, a pad, a smart wearable device, etc., which is not limited 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 changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied 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 plate, wherein 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 plate 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 second voice coil and the upper ends 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, characterized in that: The first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion, and a plurality of 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 length direction of the annular connecting portion, and 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, characterized in that: 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, characterized in that: The vibration system also 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, characterized in that: 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, characterized in that: 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.

7. The sound generating device according to claim 6, characterized in that: 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, characterized in that: 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, characterized in that: The second voice coil is configured as a special-shaped voice coil having a concave curved section disposed at a spacing position corresponding to two adjacent first voice coils.

10. The sound generating device according to claim 1, characterized in that: 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 source.

11. The sound generating device according to claim 10, characterized in that: The first connecting portion includes an annular connecting portion and connecting legs extending outward from the annular connecting portion, and a plurality of connecting legs are arranged at intervals along the circumference of the annular connecting portion, and each of the connecting legs is sequentially connected to an elastic portion and a second connecting portion, 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 length 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.

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, the number of the central magnetic circuit portions being two and arranged side by side, the number of the first side magnetic circuit portions being two and arranged one by one at intervals around the corresponding central magnetic circuit portion and forming a first magnetic gap between the corresponding central magnetic circuit portion, the second side magnetic circuit portions being 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, characterized in that: The first side magnetic circuit portion includes a plurality of first side magnets connected end to end in sequence, 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 arranged in one avoidance gap.

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

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