Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, the sound production device comprises a magnetic circuit system, a conductive support and a vibration system, the magnetic circuit system is provided with a mounting hole, a first magnetic gap and a second magnetic gap which are sequentially arranged at intervals from inside to outside, the conductive support is arranged in the mounting hole, and the vibration system comprises a vibrating diaphragm assembly, a voice coil assembly and a first support chip. The vibrating diaphragm assembly and the magnetic circuit system are oppositely arranged, the voice coil assembly comprises a first voice coil and a second voice coil, one end of the first voice coil and one end of the second voice coil are fixedly arranged on the vibrating diaphragm assembly, and the other end of the first voice coil and the other end of the second voice coil correspond to the first magnetic gap and the second magnetic gap respectively. The first voice coil, the communication wire and the second voice coil are formed by winding a wire, one end of the first support chip is connected with the diaphragm assembly and electrically connected with the voice coil assembly, and the other end of the first support chip is electrically connected with the conductive support. According to the technical scheme, the operation stability of the vibration system of the sound production device is 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 running stability 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] The magnetic circuit system is provided with mounting holes, a first magnetic gap and a second magnetic gap which are sequentially arranged from the inside to the outside;

[0006] A conductive bracket, disposed in the mounting hole; and

[0007] A vibration system includes a diaphragm assembly, a voice coil assembly and a first support, wherein the diaphragm assembly is arranged opposite to the magnetic circuit system, the voice coil assembly includes a first voice coil and a second voice coil, one end of the first voice coil is fixedly arranged on the diaphragm assembly, and the other end is arranged corresponding to the first magnetic gap, one end of the second voice coil is fixedly arranged on the diaphragm assembly, and the other end is arranged corresponding to the second magnetic gap, the first voice coil is connected to the second voice coil through a connecting wire, and the first voice coil, the connecting wire and the second voice coil are formed by winding a wire, one end of the first support is connected to the diaphragm assembly and electrically connected to the voice coil assembly, and the other end of the first support is electrically connected to the conductive bracket.

[0008] 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 first side magnetic circuit portion being arranged around the central magnetic circuit portion and forming a first magnetic gap with the central magnetic circuit portion, the second side magnetic circuit portion being arranged around the first side magnetic circuit portion and forming the second magnetic gap with the first side magnetic circuit portion, and the mounting hole passes through the magnetic yoke and the central magnetic circuit portion.

[0009] In one embodiment, the second voice coil is connected to the first voice coil via a section of the connecting wire, two sections of the lead wires of the voice coil assembly are both connected to the first voice coil and extend toward the inside of the first voice coil, and the first support is located inside the first voice coil.

[0010] In one embodiment, the first support piece includes a first connecting portion, a first elastic portion, and a second connecting portion which are connected in sequence, the first connecting portion is electrically connected to the conductive bracket, and the second connecting portion is fixed to the diaphragm assembly and electrically connected to the lead of the voice coil assembly.

[0011] In one embodiment, the central magnetic circuit portion includes a central magnet connected to the magnetic yoke, and a central washer arranged at one end of the central magnet close to the diaphragm assembly, and a second avoidance groove is provided on the surface of the central washer close to the diaphragm assembly corresponding to the second connecting portion.

[0012] In one embodiment, the first connecting portion, the first elastic portion and the second connecting portion are an integrally formed structure.

[0013] In one embodiment, the first elastic portion is provided with at least one bend.

[0014] In one embodiment, a plurality of the first support sheets are provided, and the plurality of the first support sheets are arranged at intervals along the circumference of the conductive support.

[0015] In one embodiment, the plurality of first supporting pieces are an integrally formed structure.

[0016] In one embodiment, the main body of the first support plate is made of an insulating material, a conductive circuit is provided on the insulating material, and the voice coil assembly is electrically connected to the conductive support via the conductive circuit.

[0017] In one embodiment, the sound-generating device further includes a housing connecting the magnetic circuit system and the diaphragm assembly, and the vibration system further includes a second support plate, a plurality of second supports are arranged at intervals along the circumference of the second voice coil, and the second voice coil is also connected to the housing through the second support plate.

[0018] In one embodiment, the second support includes a third connection portion, a second elastic portion, and a fourth connection portion which are connected in sequence, the third connection portion is connected to the second voice coil, and the fourth connection portion is connected to the housing.

[0019] In one embodiment, the second side magnetic path portion is provided with a plurality of avoidance gaps connected to the second magnetic gap, and one of the second support pieces is correspondingly provided at one of the avoidance gaps.

[0020] In one embodiment, the third connecting portion, the second elastic portion and the fourth connecting portion are an integrally formed structure.

[0021] In one embodiment, the second elastic portion is provided with at least one bend.

[0022] In one embodiment, the second support sheet is made of elastomer, metal or engineering plastic.

[0023] In one embodiment, the diaphragm assembly comprises:

[0024] A diaphragm, the diaphragm is arranged opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm;

[0025] A frame, the frame is arranged in the inner ring hole and connected to the diaphragm, the first support is connected to the frame, and the frame is provided with an assembly hole corresponding to the conductive bracket; and

[0026] A ball top, the ball top cover is arranged on the assembly hole;

[0027] Wherein, the first voice coil and the second voice coil are both connected to the frame.

[0028] In one embodiment, the skeleton is provided with a connecting flange extending from the edge of the assembly hole toward the mounting hole, the first support piece includes a first connecting portion, a first elastic portion, and a second connecting portion connected in sequence, the first connecting portion is electrically connected to the conductive bracket, the second connecting portion is fixed to the diaphragm assembly and is electrically connected to the lead of the voice coil assembly, and a transition section extending along the vibration direction of the vibration system is provided between the second connecting portion and the first elastic portion, and the transition section is connected to the connecting flange.

[0029] The present invention also provides an electronic device, comprising the aforementioned sound-generating device.

[0030] In the technical solution of the present invention, by arranging multiple voice coils, the amplitude of the vibration system can be increased, thereby improving the loudness of the sound-generating device; the first support is connected to the conductive bracket, the conductive bracket is arranged in the magnetic circuit system, and the magnetic circuit system is relatively fixed to the shell, so as to provide a support point for the vibration system, that is, the first support can provide a stabilizing force for the vibration system, avoiding shaking and polarization of the vibration system when vibrating with a large amplitude. In addition, since multiple second supports are arranged at intervals in the circumferential direction, multiple positions on the vibration system that are distributed at intervals in the circumferential direction can be affected by the stabilizing force provided by the second support, which is conducive to ensuring the vibration stability of the vibration system. On this basis, the first support is reused as an electrical connection structure, so that the first voice coil and the second voice coil can be electrically connected to the conductive bracket through the first support, thereby realizing electrical connection with an external power supply, and there is no need to add an additional electrical connection structure. At the same time, the first voice coil and the second voice coil are integrally wound by a wire, and the first voice coil and the second voice coil can maintain a conductive relationship. The first voice coil and the second voice coil do not need to be provided with two leads respectively. The first voice coil and the second voice coil as a whole can be provided with one lead-in wire and one lead-out wire, and the electrical connection point on the first support can also be simplified to two. In this way, the structure of the sound-generating device can be simplified, which is convenient for the layout of the internal space of the sound-generating device, and is also conducive to reducing the volume of the sound-generating device and ensuring the miniaturization of the sound-generating device. In addition, by arranging the conductive bracket in the mounting hole of the magnetic circuit system, it is not necessary to set the space required for the first support to lead out in the magnetic circuit system, thereby increasing the volume of the magnetic circuit system and improving the BL value of the product. In addition, due to the serious magnetic leakage in the central position of the magnetic circuit system, the mounting hole needs to be formed by removing at least a part of the central magnet in the central position of the magnetic circuit system, thereby reducing the magnetic leakage of the central magnet. When the sound-emitting device is assembled in an electronic device, the influence of the magnetic leakage of the central magnet in the sound-emitting device on the performance of the electronic device can be reduced, thereby meeting the requirements of the electronic device for magnetic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 A schematic diagram of the explosion structure of an embodiment of the sound-generating device of the present invention;

[0033] Figure 2 It is a structural schematic diagram of an embodiment of a voice coil assembly of a sound-generating device of the present invention;

[0034] Figure 3It is a structural schematic diagram of an embodiment of two integrally formed first supporting pieces of the sound-generating device of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the sound-generating device of an embodiment of the present invention after the diaphragm assembly is removed;

[0036] Figure 5 It is a structural schematic diagram of an embodiment of the top portion (the side where the diaphragm assembly is arranged) of the sound-generating device of the present invention;

[0037] Figure 6 for Figure 2 Schematic diagram of the cross-section structure cut along XX;

[0038] Figure 7 for Figure 6 A magnified view of the local structure between the two dashed lines in FIG.

[0039] Figure 8 A schematic diagram of the coordination of a conductive support and a magnetic yoke of a sound-generating device according to an embodiment of the present invention;

[0040] Fig. 9 It is an enlarged view of the local structure of the skeleton of the diaphragm assembly of the sound-generating device of the present invention at the assembly hole.

[0041] Description of Figure Numbers:

[0042] 100. Shell;

[0043] 200, magnetic circuit system; 201, first magnetic gap; 202, second magnetic gap; 203, mounting hole; 210, magnetic yoke;

[0044] 220, central magnetic circuit portion; 221, central magnet; 222, central washer; 2221, second avoidance groove;

[0045] 230, a first side magnetic circuit portion; 231, a first side magnet; 232, a first side washer;

[0046] 240, second side magnetic circuit portion; 241, second side magnet; 242, second side washer; 243, avoidance gap;

[0047] 300. Vibration system;

[0048] 310, diaphragm assembly; 311, diaphragm; 3111, inner ring hole; 312, frame; 3121, assembly hole; 3122, connecting flange; 3123, first boss; 3124, second boss; 313, ball top;

[0049] 320, first voice coil; 325, lead wire; 326, connecting wire; 330, second voice coil;

[0050] 340, first support sheet; 341, first connecting portion; 342, second connecting portion; 343, first elastic portion; 344, transition section;

[0051] 350, second support sheet; 351, third connecting portion; 352, fourth connecting portion; 353, second elastic portion;

[0052] 400, conductive bracket; 410, main body; 420, solder pad.

[0053] 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

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The invention provides a sound generating device.

[0058] Reference Figures 1 to 8 In one embodiment of the present invention, the sound-generating device comprises:

[0059] The magnetic circuit system 200 is provided with a mounting hole 203, a first magnetic gap 201 and a second magnetic gap 202 which are sequentially arranged from the inside to the outside;

[0060] A conductive bracket 400 is disposed in the mounting hole 203; and

[0061] The vibration system 300 includes a diaphragm assembly 310, a voice coil assembly and a first support piece 340. The diaphragm assembly 310 is arranged opposite to the magnetic circuit system 200. The voice coil assembly includes a first voice coil 320 and a second voice coil 330. One end of the first voice coil 320 is fixed to the diaphragm assembly 310, and the other end is arranged corresponding to the first magnetic gap 201. One end of the second voice coil 330 is fixed to the diaphragm assembly 310, and the other end is arranged corresponding to the second magnetic gap 202. The first voice coil 320 is connected to the second voice coil 330 through a connecting wire 326, and the first voice coil 320, the connecting wire 326 and the second voice coil 330 are formed by winding a wire. One end of the first support piece 340 is connected to the diaphragm assembly 310 and electrically connected to the voice coil assembly. The other end of the first support piece 340 is electrically connected to the conductive bracket 400.

[0062] In the technical solution of the present invention, by arranging multiple voice coils, the amplitude of the vibration system 300 can be increased, thereby improving the loudness of the sound-generating device; the first support 340 is connected to the conductive bracket 400, and the conductive bracket 400 is arranged on the magnetic circuit system 200, so as to provide a support point for the vibration system 300, that is, the first support 340 can provide a stabilizing force for the vibration system 300, and prevent the vibration system 300 from shaking and polarizing when vibrating with a large amplitude. In addition, since the multiple second supports 350 are arranged at intervals in the circumferential direction, the multiple positions on the vibration system 300 that are distributed at intervals in the circumferential direction can be subjected to the stabilizing force provided by the second supports 350, which is conducive to ensuring the vibration stability of the vibration system 300. On this basis, the first support 340 is reused as an electrical connection structure, so that the first voice coil 320 and the second voice coil 330 can be electrically connected to the conductive bracket 400 through the first support 340, thereby realizing electrical connection with an external power supply, and no additional electrical connection structure is required. At the same time, the first voice coil 320 and the second voice coil 330 are integrally wound by a wire, and the first voice coil 320 and the second voice coil 330 can maintain a conductive relationship. The first voice coil 320 and the second voice coil 330 do not need to be respectively provided with two lead wires 325. The first voice coil 320 and the second voice coil 330 can be provided with one lead-in wire and one lead-out wire as a whole, and the electrical connection point on the first support 340 can also be simplified to two. In this way, the structure of the sound-generating device can be simplified, which is convenient for the layout of the internal space of the sound-generating device, and is also conducive to reducing the volume of the sound-generating device and ensuring the miniaturization of the sound-generating device.

[0063] In addition, by arranging the conductive bracket 400 in the mounting hole 203 of the magnetic circuit system 200, it is not necessary to arrange the space required for the first support piece 340 to be led out in the magnetic circuit system 200, thereby increasing the volume of the magnetic circuit system 200 and improving the BL value of the product. In addition, since the magnetic flux leakage at the central position of the magnetic circuit system 200 is serious, the mounting hole 203 needs to be formed by removing at least a part of the central magnet 221 at the central position of the magnetic circuit system 200, thereby reducing the magnetic flux leakage of the central magnet 221. When the sound-generating device is assembled in an electronic device, the influence of the magnetic flux leakage of the central magnet 221 in the sound-generating device on the performance of the electronic device can be reduced, and the requirements of the electronic device for the magnetic flux leakage can be met.

[0064] It should be noted that the end of the first voice coil 320 away from the diaphragm assembly 310 is arranged corresponding to the first magnetic gap 201, and the end of the second voice coil 330 away from the diaphragm assembly 310 is arranged corresponding to the second magnetic gap 202. It can be understood that the end of the first voice coil 320 can be inserted into the first magnetic gap 201. Of course, the end of the first voice coil 320 can also be located above the first magnetic gap 201. Similarly, the end of the second voice coil 330 can also be inserted into the second magnetic gap 202, and can also be located above the second magnetic gap 202.

[0065] In one embodiment, 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 first side magnetic circuit portion 230 is arranged around the central magnetic circuit portion 220, and a first magnetic gap 201 is formed between the first side magnetic circuit portion 230 and the central magnetic circuit portion 220, the second side magnetic circuit portion 240 is arranged around the first side magnetic circuit portion 230, and a second magnetic gap 202 is formed between the second side magnetic circuit portion 230, the second side magnetic circuit portion 240 is provided with an avoidance notch 243 for accommodating the first support piece 340, and the mounting hole 203 passes through the magnetic yoke 210 and the central magnetic circuit portion 220.

[0066] 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 .

[0067] In this way, the first side magnetic circuit portion 230 is used as a common magnetic circuit structure of the first magnetic gap 201 and the second magnetic gap 202, 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. In addition, since the mounting hole 203 passes through the magnetic yoke 210 and the central magnetic circuit portion 220, it is convenient to combine the conductive bracket 400 with the magnetic yoke 210, so that the conductive bracket 400 can form a conductive position both inside and outside the sound-generating device, and the external conductive position is used for electrical connection of an external power supply, and the internal conductive position is used for electrical connection of the first support 340.

[0068] Of course, in other embodiments, the first magnetic gap 201 and the second magnetic gap 202 may be respectively constructed by two independent magnetic circuit groups. The central magnetic circuit structure of the second magnetic gap 202 may be superimposed on the side magnetic circuit structure of the first magnetic gap 201, which can also achieve the purpose of reducing the radial dimension. The through mounting hole 203 may not be provided on the magnetic yoke 210. An electrical connection structure for connecting to an external power supply is formed on the magnetic yoke 210. The conductive bracket 400 is installed on the magnetic yoke 210 and is electrically connected to the electrical connection structure.

[0069] In one embodiment, see Figure 3 and Figure 4 , the second voice coil 330 is connected to the first voice coil 320 through a connecting wire 326, wherein the two leads 325 of the voice coil assembly are respectively provided on the first voice coil 320 and the second voice coil 330, and the first support 340 is respectively electrically connected to the two leads 325. That is, a wire is firstly wound to form one of the first voice coil 320 and the second voice coil 330, and then wound to form the other of the first voice coil 320 and the second voice coil 330, so that the processing and forming of the first voice coil 320 and the second voice coil 330 are facilitated, and the structural stability of the first voice coil 320 and the second voice coil 330 is ensured. One of the first lead 325 and the second lead 325 is used to input current to the voice coil assembly, and the other is used for the voice coil assembly to output current to the outside. By connecting the first lead 325 and the second lead 325 to the first support 340, the voice coil assembly can be connected to an external power source through the circuit on the first support 340.

[0070] The lead wire 325 can be located outside the second voice coil 330 or inside the first voice coil 320, or between the first voice coil 320 and the second voice coil 330. The lead wire 325 and the connecting wire 326 can be arranged close to each other on the same side or on opposite sides. Without loss of generality, the lead wire 325 of the first voice coil 320 and the lead wire 325 of the second voice coil 330 are located on one side of the long axis direction of the voice coil assembly, and the connecting wire 326 is located on the other side of the long axis direction of the voice coil assembly. The lead wire 325 of the first voice coil 320 is located on the inner circumference side of the first voice coil 320, and the lead wire 325 of the second voice coil 330 is located on the inner circumference side of the second voice coil 330 and between the first voice coil 320 and the second voice coil 330. In this way, the first voice coil 320 and the second voice coil 330 can be easily wound, and the first support 340 and the lead wire 325 of the first voice coil 320 and the second voice coil 330 can be easily electrically connected.

[0071] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 7 , the first support 340 includes a first connection portion 341, a first elastic portion 343 and a second connection portion 342 connected in sequence, the first connection portion 341 is electrically connected to the conductive support 400, the second connection portion 342 is fixed to the diaphragm assembly 310, and is electrically connected to the lead 325 of the voice coil assembly. In this way, the first connection portion 341 can provide a stable connection structure for the conductive support 400, and the second connection portion 342 can provide a stable connection structure for the lead 325 of the voice coil assembly, so that the second connection portion 342 and the voice coil assembly and the diaphragm assembly 310 maintain the consistency of movement. The first elastic portion 343 has the ability to deform and restore deformation, and can prevent lateral displacement and unnecessary vibration of the system through the first elastic portion 343, thereby ensuring the clarity and accuracy of the sound quality. Of course, in other embodiments, the lead 325 of the voice coil assembly can also be connected to the first connection portion 341, and the lead 325 of the voice coil assembly can be left with a sufficient length.

[0072] In one embodiment, please refer to Figure 2 and Figure 4The central magnetic circuit portion 220 includes a central magnet 221 connected to the magnetic yoke 210, and a central washer 222 disposed at one end of the central magnet 221 close to the diaphragm assembly 310. The surface of the central washer 222 close to the diaphragm assembly 310 is provided with a second avoidance groove 2221 corresponding to the second connection portion 342. In this way, the second connection portion 342 can be avoided by the second avoidance groove 2221. When the first support plate 340 is driven to move in the vibration direction of the vibration system 300, the second avoidance groove 2221 can provide sufficient movement space for the second connection portion 342, so that the first support plate 340 is not interfered, thereby ensuring that the movement of each voice coil and the diaphragm assembly 310 is not affected. In this way, the internal structure of the sound-generating device can be compactly arranged in the axial direction without interfering with each other, which is conducive to ensuring the miniaturization of the sound-generating device. Of course, in other embodiments, the distance between the center washer 222 and the second connection portion 342 in the vibration direction of the vibration system 300 may be increased to achieve avoidance between the two.

[0073] In one embodiment, the first connection portion 341, the first elastic portion 343 and the second connection portion 342 are an integrally formed structure. This is conducive to ensuring the structural stability and structural consistency of the first support piece 340, and is convenient for the production, processing and assembly of the first support piece 340. Of course, in other embodiments, the first connection portion 341, the first elastic portion 343 and the second connection portion 342 of the first support piece 340 can also be formed separately and then bonded, welded or clamped together.

[0074] In one embodiment, the first elastic part 343 is provided with at least one bend. In this way, the first elastic part 343 can have a certain deformation ability and deformation recovery ability, ensuring that the first elastic part 343 can absorb vibration energy in other directions. The bend can be bent in the horizontal direction or in the vibration direction of the vibration system 300. Of course, in other embodiments, the first elastic part 343 can also be other structural forms.

[0075] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 , a plurality of first support pieces 340 are provided, and the plurality of first support pieces 340 are arranged at intervals along the circumference of the conductive bracket 400. In this way, the stabilizing effect of the first support piece 340 on the diaphragm assembly 310 can be improved to ensure the vibration stability of the vibration system 300. At the same time, the electrical connection points between the first support piece 340 and the two voice coils can be dispersed to avoid excessive heat concentration, which affects the electrical connection stability between the first support piece 340 and the two voice coils. Of course, in other embodiments, only one first support piece 340 is provided, and the positions of the electrical connection between the first support piece 340 and the two voice coils can be dispersed.

[0076] Without loss of generality, in the long axis direction of the magnetic circuit system 200, two first support pieces 340 are symmetrically provided, wherein two first pads and one second pad are provided on the second connection section of one first support piece 340, and a second pad is provided on the second connection section of the other first support piece 340, and the two first pads are respectively provided for electrical connection of the two leads 325 of the first voice coil 320, and the two second pads are respectively provided for electrical connection of the two leads 325 of the second voice coil 330. However, the present invention is not limited thereto, and in other embodiments, the two first pads may be separately provided on the second connection sections of the two first support pieces 340, that is, a first pad and a second pad are provided on the second connection section of one first support piece 340, and a first pad and a second pad are also provided on the second connection section of the other first support piece 340; or, two first pads are provided on the second connection section of one first support piece 340, and two second pads are provided on the second connection section of the other first support piece 340.

[0077] In one embodiment, the first plurality of support sheets 340 are integrally formed. In this way, the structural consistency of the first plurality of support sheets 340 can be improved, and the processing, forming and assembly of the first plurality of support sheets 340 can be facilitated. Specifically, the first connection portions 341 of the first plurality of support sheets 340 are integrally formed, and the conductive support 400 is connected via the integrally formed first connection portions 341. The first connection portions 341 are provided with at least two third pads to at least correspond to the positive and negative connection positions of the conductive support 400. Of course, in other embodiments, the first plurality of support sheets 340 can also be formed separately and independently connected to the conductive support 400.

[0078] In one embodiment, the main body of the first support 340 is made of an insulating material, and a conductive circuit is provided on the insulating material, and the first voice coil 320 and the second voice coil 330 are both electrically connected to the conductive support 400 through the conductive circuit. In this way, the first voice coil 320 and the second voice coil 330 can be stably and reliably electrically connected to the conductive support 400 through the conductive circuit on the first support 340 to ensure the working performance of the sound-generating device. Of course, in other embodiments, the main body of the first support 340 can also be made of a conductive material, and an insulating film layer can be coated on the outer surface of the first support 340.

[0079] Optionally, the insulating material used in the main body of the first support piece 340 is a composite material, which can combine the advantages of multiple materials, so that the main body of the first support piece 340 has sufficient hardness and strength, so that the first support piece 340 can stably and reliably provide stabilizing force for the vibration system 300. Specifically, glass fiber reinforced plastic can be used, the matrix material can be epoxy resin, polyester resin, etc., and the reinforcing material can be glass fiber; carbon fiber reinforced plastic can also be used, the matrix material can be epoxy resin, bismaleimide, etc., and the reinforcing material can be carbon fiber; aramid fiber reinforced plastic can also be used, the matrix material can be epoxy resin, phenolic resin, etc., and the reinforcing material can be aramid fiber; or glass cloth laminate can be used, the matrix material can be epoxy resin, and the reinforcing material can be glass fiber cloth. Of course, in other embodiments, the insulating material used in the main body of the first support piece 340 can also be a single material, such as engineering plastic or rubber material.

[0080] In one embodiment, please refer to Figures 1 to 3 , the second side magnetic circuit portion 240 is formed into a square structure, the four corners of the second side magnetic circuit portion 240 are provided with the avoidance gaps 243, and there are four second support plates 350, which are arranged one by one in the corresponding avoidance gaps 243. In this way, the layout of the internal components of the sound-generating device can be facilitated, and the various components can be compactly matched without interfering with each other, which is conducive to the miniaturized design of the sound-generating device; and the four second support plates 350 can act on the second voice coil 330 relatively evenly in the circumferential direction, thereby ensuring the vibration stability of the vibration system 300. Specifically, the second side magnet 241 and the second side washer 242 are correspondingly formed with avoidance gaps 243. Of course, in other embodiments, the second side magnetic circuit can also be annular or quasi-annular.

[0081] In one embodiment, see Figure 1 The first side magnetic path portion 230 is formed into a closed ring structure, and the second side magnetic path portion 240 includes a plurality of second side magnets 241 arranged at intervals, and the avoidance gaps 243 are defined between adjacent second side magnets 241.

[0082] For the first side magnetic circuit portion 230, the first side magnet 231 may be set as a circumferentially continuous structure, or a plurality of first side magnets 231 may be set and intermittently distributed along the circumference, and compactly arranged in a ring shape, and the interval between each two adjacent first side magnets 231 is very small, so that the first side magnetic circuit portion 230 as a whole can have a compact layout in the circumferential direction to form a structure similar to a closed ring, and at the same time, the first side magnet 231 is controlled to have a suitable length to facilitate the production and processing of the first side magnet 231, and the first side washer 232 can be set as a circumferentially continuous structure, so that the circumferential space can be fully utilized to maximize the volume of the first side magnet 231 to ensure the magnetic field strength of the first magnetic gap 201 and the second magnetic gap 202, thereby ensuring the sound performance of the sound-generating device. Of course, in other embodiments, under the premise that the magnetic field strength of the first side magnetic circuit portion 230 is sufficient, the intervals between the multiple magnets included in the first side magnet 231 can also be set larger.

[0083] For the second magnetic circuit portion 240, at least the second side magnets 241 are distributed differently in the long axis direction and the short axis direction, and the second side magnets 241 in the long axis direction and the short axis direction are arranged at large intervals to form avoidance gaps 243 at the four corners of the second magnetic circuit portion 240. Furthermore, on each side in the long axis direction, a plurality of second side magnets 241 arranged in sequence can be correspondingly arranged so that the second side magnets 241 can have a suitable length, which is convenient for the production and processing of the second side magnets 241. The intervals between the plurality of second side magnets 241 arranged on the same long axis side can be slightly smaller so that the arrangement is compact, which is conducive to ensuring the magnetic field strength of the second magnetic circuit portion 240. Of course, in other embodiments, the first side magnets 231 can also be a circumferentially continuous structure, and the corresponding corner positions of the surface facing the diaphragm assembly 310 are recessed toward the direction of the magnetic yoke 210 to form avoidance gaps 243.

[0084] In one embodiment, the magnetic yoke 210 and the conductive bracket 400 are integrally injection molded. Figure 7The conductive support 400 includes a main body 410 and a pad 420. The main body 410 is connected to the magnetic yoke 210. The pad 420 is embedded in the main body 410. The pad has exposed conduction positions on opposite sides of the magnetic yoke 210. The conduction position exposed outside the sound-generating device is used for connection with an external power source, and the conduction position exposed inside the sound-generating device is used for connection with the first connection portion 341. The main body 410 can be made of plastic material, so that the magnetic yoke 210 can be integrally molded with the conductive support 400 by injection molding, thereby eliminating the assembly process of the magnetic yoke 210 and the conductive support 400, and can improve the connection stability of the magnetic yoke 210 and the conductive support 400. Of course, in other embodiments, the magnetic yoke 210 and the conductive support 400 can also be assembled into one after being separately molded.

[0085] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 6 and Figure 7 , the sound-generating device further includes a housing 100 connecting the magnetic circuit system 200 and the diaphragm assembly 310, and the vibration system 300 further includes a second support 350, and a plurality of the second support 350 are arranged at intervals along the circumference of the second voice coil 330, and the second voice coil 330 is also connected to the housing 100 through the second support 350. In this way, the housing 100 can provide an additional support point for the vibration system 300 to ensure the vibration stability of the vibration system 300, and because the plurality of second support 350 are arranged at intervals in the circumference, the plurality of positions on the vibration system 300 that are distributed at intervals in the circumference can be subjected to the stabilizing force provided by the second support 350, which is conducive to ensuring the vibration consistency of the vibration system 300 in the circumferential direction. Of course, in other embodiments, the second support 350 may not be provided, or the second support 350 may be connected to the diaphragm assembly 310 and the housing 100 respectively.

[0086] In one embodiment, see Figure 1 and Figure 4 The second support piece 350 includes a third connection part 351, a second elastic part 353 and a fourth connection part 352 which are connected in sequence. The third connection part 351 is connected to the second voice coil 330, the fourth connection part 352 is connected to the housing 100, and the second elastic part 353 is provided with at least one bend. In this way, the second elastic part 353 has a certain deformation ability and deformation recovery ability, which ensures that the second elastic part 353 can absorb vibration energy in other directions and prevent lateral displacement and unnecessary vibration of the vibration system 300. The bend set in the second elastic part 353 can be bent in the horizontal direction or in the vibration direction of the vibration system 300. Of course, in other embodiments, the second support piece 350 can also be other structural forms.

[0087] In one embodiment, the third connection portion 351, the second elastic portion 353 and the fourth connection portion 352 are an integrally formed structure. This is conducive to ensuring the structural stability and structural consistency of the second support piece 350, and is convenient for the production, processing and assembly of the second support piece 350. Of course, in other embodiments, the third connection portion 351, the second elastic portion 353 and the fourth connection portion 352 of the second support piece 350 can also be formed separately and then bonded, welded or clamped together.

[0088] In one embodiment, the material of the second support sheet 350 is one of rubber, elastomer, metal or engineering plastic. The metal can be stainless steel, spring steel or aluminum alloy, the elastomer can be polyurethane or polyester, and the engineering plastic can be nylon, polyoxymethylene, polyimide and polytetrafluoroethylene. In this way, while ensuring the structural stability of the second support sheet 350, the second support sheet 350 has sufficient deformation ability and deformation recovery ability, so that the second support sheet 350 can stably and reliably provide stabilizing force for the vibration system 300. Of course, in other embodiments, the second support sheet 350 can also be made of other suitable materials.

[0089] In one embodiment, please refer to Figure 1 and Figure 4 , the second side magnetic circuit portion 240 is provided with a plurality of avoidance gaps 243 connected to the second magnetic gap 202, and one of the second support pieces 350 is correspondingly provided in one of the avoidance gaps 243. In this way, the second support piece 350 can be avoided through the avoidance gaps 243. When the second support piece 350 is driven to move in the vibration direction of the vibration system 300, the avoidance gaps 243 can provide sufficient movement space for the second support piece 350, so that the second support piece 350 is not interfered with, thereby ensuring that the movement of the voice coil and the diaphragm assembly 310 is not affected. Specifically, the second side magnet 241 and the second side washer 242 are both provided with avoidance gaps 243. 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 second support piece 350 and the magnetic circuit structure can be staggered.

[0090] In one embodiment, please refer to Figure 1 , Figure 4 , Figure 7 and Fig. 9 , the diaphragm assembly 310 includes:

[0091] A diaphragm 311, wherein the diaphragm 311 is arranged opposite to the magnetic circuit system 200, and an inner ring hole 3111 is arranged at the center of the diaphragm 311;

[0092] A frame 312, wherein the frame 312 is disposed in the inner ring hole 3111 and connected to the diaphragm 311, the first support piece 340 is connected to the frame 312, and the frame 312 is provided with an assembly hole 3121 corresponding to the conductive bracket 400; and

[0093] A ball top 313, wherein the ball top 313 is covered in the assembly hole 3121;

[0094] The first voice coil 320 and the second voice coil 330 are both connected to the frame 312 .

[0095] In one embodiment, the frame 312 is provided with a connecting flange 3122 extending from the edge of the assembly hole 3121 toward the installation hole 203 , and the side of the first support piece 340 facing away from the conductive bracket 400 is connected to the connecting flange 3122 .

[0096] In this embodiment, the diaphragm assembly 310 is provided with a three-part structure of a diaphragm 311, a frame 312 and a dome 313, so that the periphery of the diaphragm 311 is connected to the housing 100, and an inner ring hole 3111 is formed in the center of the diaphragm 311. The frame 312 is provided at the inner ring hole 3111, so that the frame 312 is used to connect and fix the voice coil and the first support 340, thereby improving the installation stability. At the same time, by providing an assembly hole 3121 on the frame 312 corresponding to the conductive bracket 400, the assembly hole 3121 can be used to conveniently position and install the first support 340, so that the first support 340 is connected and fixed to the conductive bracket 400 and the frame 312, thereby improving the installation convenience.

[0097] It can be understood that in order to seal the assembly hole 3121 , a spherical top 313 is provided at the assembly hole 3121 so that the spherical top 313 covers the assembly hole 3121 . This can not only seal the assembly hole 3121 but also ensure the vibration performance of the diaphragm assembly 310 .

[0098] In one embodiment, see Fig. 9 The frame 312 is further provided with a connecting flange 3122 adjacent to the assembly hole 3121 and extending toward the mounting hole 203 , and a side of the first support piece 340 away from the conductive bracket 400 is connected to the connecting flange 3122 .

[0099] In this embodiment, a connecting flange 3122 is provided on the frame 312 so that the connecting flange 3122 extends toward the mounting hole 203 . Thus, the connecting flange 3122 can be used to further fix the first support piece 340 , thereby improving the connection stability of the first support piece 340 .

[0100] Please also read Figure 2 , Figure 4 , Figure 7 and Fig. 9 , the first support piece 340 also includes a transition section 344 that is bent and connected to both the second connection part 342 and the first elastic part 343, and the transition section 344 extends along the vibration direction of the diaphragm assembly 310. In this way, there can be a height difference between the second connection part 342 and the first elastic part 343 in the vibration direction of the diaphragm assembly 310, which can facilitate the connection between the first connection part 341 and the conductive bracket 400 on the magnetic circuit system 200. At the same time, the transition section 344 can make the second connection part 342 and the first elastic part 343 located at different horizontal planes, and the second connection part 342 and the first elastic part 343 can play a centering role on the vibration system 300 from different positions, thereby improving the vibration stability of the vibration system 300. Of course, in other embodiments, part of the first elastic part 343 or the second connection part 342 can extend along the vibration direction of the diaphragm assembly 310.

[0101] Specifically, the connecting flange 3122 can be closely connected to the transition section 344 of the first support piece 340, thereby facilitating the positioning and assembly of the first support piece 340 and the skeleton 312, and can provide support for the transition section 344 of the first support piece 340 through the skeleton 312, which is beneficial to improving the structural stability of the first support piece 340.

[0102] Optionally, the connecting flange 3122 is formed by bending or stretching one side of the frame 312 adjacent to the assembly hole 3121. For example, the connecting flange 3122 is formed as a vertically extending structure extending along the vibration direction (vertical direction) of the vibration system 300 by a side wall of the frame 312 adjacent to the assembly hole 3121. Such a configuration can effectively improve the structural strength and processing convenience of the connecting flange 3122. Of course, in other embodiments, the connecting flange 3122 and the frame 312 can also be separately configured and connected to form an integrated structure by welding or bonding, which is not limited here.

[0103] Optionally, the connecting flange 3122 includes a plurality of connecting flanges 3122, which are arranged at intervals along the periphery of the assembly hole 3121. Each connecting flange 3122 includes two first bosses 3123 protruding toward the inner circumference of the assembly hole 3121, and a second boss 3124 connected between the two first bosses 3123 and protruding toward the outer circumference of the assembly hole 3121. The transition section 344 of the second connecting portion 342 is fitted and connected to the second boss 3124, which is conducive to improving the structural stability of the connecting flange 3122, thereby enhancing the supporting capacity of the connecting flange 3122 for the transition section 344. Without loss of generality, the connecting flange 3122 includes two connecting flanges 3122, which are respectively arranged corresponding to the long axis direction or the short axis direction of the magnetic circuit system 200.

[0104] It should be noted that the specific structural design of the connecting flange 3122 is not limited to the above-described situation. As long as the installation and fixation of the first support piece 340 can be achieved, the present invention does not impose any specific limitation on this.

[0105] 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.

[0106] 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: The magnetic circuit system is provided with mounting holes, a first magnetic gap and a second magnetic gap which are sequentially arranged from the inside to the outside; A conductive bracket, arranged in the mounting hole; as well as A vibration system includes a diaphragm assembly, a voice coil assembly and a first support, wherein the diaphragm assembly is arranged opposite to the magnetic circuit system, the voice coil assembly includes a first voice coil and a second voice coil, one end of the first voice coil is fixedly arranged on the diaphragm assembly, and the other end is arranged corresponding to the first magnetic gap, one end of the second voice coil is fixedly arranged on the diaphragm assembly, and the other end is arranged corresponding to the second magnetic gap, the first voice coil is connected to the second voice coil through a connecting wire, and the first voice coil, the connecting wire and the second voice coil are formed by winding a wire, one end of the first support is connected to the diaphragm assembly and electrically connected to the voice coil assembly, and the other end of the first support is electrically connected to the conductive bracket.

2. The sound generating device according to claim 1, 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 first side magnetic circuit portion is arranged around the central magnetic circuit portion and a first magnetic gap is formed between the first side magnetic circuit portion and the central magnetic circuit portion. The second side magnetic circuit portion is arranged around the first side magnetic circuit portion and a second magnetic gap is formed between the second side magnetic circuit portion and the first side magnetic circuit portion. The mounting hole passes through the magnetic yoke and the central magnetic circuit portion.

3. The sound-generating device according to claim 2, characterized in that: The second voice coil is connected to the first voice coil via a connecting wire, wherein two leads of the voice coil assembly are respectively provided on the first voice coil and the second voice coil, and the first support is electrically connected to the two leads respectively.

4. The sound-generating device according to claim 3, characterized in that: The first support sheet includes a first connection portion, a first elastic portion, and a second connection portion which are connected in sequence. The first connection portion is electrically connected to the conductive bracket. The second connection portion is fixed to the diaphragm assembly and is electrically connected to the lead of the voice coil assembly.

5. The sound generating device according to claim 4, characterized in that: The central magnetic circuit portion includes a central magnet connected to the magnetic yoke, and a central washer provided at one end of the central magnet close to the diaphragm assembly, and a second avoidance groove is provided on a surface of the central washer close to the diaphragm assembly corresponding to the second connection portion; and / or The first connecting portion, the first elastic portion and the second connecting portion are an integrally formed structure; and / or The first elastic portion is provided with at least one bend.

6. The sound generating device according to claim 1, characterized in that: There are a plurality of the first support sheets, and the plurality of the first support sheets are arranged at intervals along the circumference of the conductive bracket; and / or the plurality of the first support sheets are an integrally formed structure; and / or The main body of the first support piece is made of insulating material, a conductive circuit is arranged on the insulating material, and the voice coil assembly is electrically connected to the conductive support through the conductive circuit.

7. The sound generating device according to claim 2, characterized in that: The sound-generating device also includes a shell connecting the magnetic circuit system and the diaphragm assembly. The vibration system also includes a second support plate. A plurality of second supports are arranged at intervals along the circumference of the second voice coil. The second voice coil is also connected to the shell through the second support plate.

8. The sound generating device according to claim 7, characterized in that: The second support includes a third connection portion, a second elastic portion, and a fourth connection portion which are connected in sequence. The third connection portion is connected to the second voice coil, and the fourth connection portion is connected to the housing.

9. The sound-generating device according to claim 8, characterized in that: The second side magnetic circuit portion is provided with a plurality of avoidance gaps connected to the second magnetic gap, and one of the second support pieces is correspondingly provided at one of the avoidance gaps; and / or The third connecting portion, the second elastic portion and the fourth connecting portion are an integrally formed structure; and / or The second elastic portion is provided with at least one bend.

10. The sound generating device according to claim 1, characterized in that: The second sheet is made of one of rubber, elastomer, metal and engineering plastic.

11. The sound generating device according to any one of claims 1 to 10, characterized in that: The diaphragm assembly comprises: A diaphragm, the diaphragm is arranged opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm; A frame, the frame is arranged in the inner ring hole and connected to the diaphragm, the first support is connected to the frame, and the frame is provided with an assembly hole corresponding to the conductive bracket; and A ball top, the ball top cover is arranged on the assembly hole; Wherein, the first voice coil and the second voice coil are both connected to the frame.

12. The sound generating device according to claim 11, characterized in that: The skeleton is provided with a connecting flange extending from the edge of the assembly hole toward the mounting hole, the first support piece includes a first connecting portion, a first elastic portion and a second connecting portion connected in sequence, the first connecting portion is electrically connected to the conductive bracket, the second connecting portion is fixed to the diaphragm assembly and is electrically connected to the lead of the voice coil assembly, a transition section extending along the vibration direction of the vibration system is provided between the second connecting portion and the first elastic portion, and the transition section is connected to the connecting flange.

13. An electronic device, characterized in that: Comprising a sound-generating device as claimed in any one of claims 1 to 12.

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